MME Changes in Release
14.0
This chapter
identifies features and functionality added to, modified for, or
deprecated from 14.0 MME software releases.
Topics covered in this
chapter are:
-
Omissions and Corrections
-
MME Feature Changes
as of May 31, 2013
-
MME Command Changes
as of May 31, 2013
-
MME Performance Indicator
Changes as of May 31, 2013
-
MME Feature Changes
as of January 31, 2013
-
MME Configuration
Management Changes as of January 31, 2013
-
MME Performance Management
Changes as of January 31, 2013
-
MME Security Management
Changes as of January 31, 2013
-
MME Feature Changes
as of November 7, 2012
-
MME Configuration Management
Changes as of November 7, 2012
-
MME Performance Management
Changes as of November 7, 2012
-
MME Security Management
Changes as of November 7, 2012
-
MME Feature Changes as
of September 28, 2012
-
MME Configuration Management
Changes as of September 28, 2012
-
MME Performance Management
Changes as of September 28, 2012
-
MME Security Management
Changes as of September 28, 2012
-
MME Feature Changes
as of July 31, 2012
-
MME Configuration Management
Changes as of July 31, 2012
-
MME Performance Management
Changes as of July 31, 2012
-
MME Security Management
Changes as of July 31, 2012
-
MME Feature Changes
as of June 29, 2012
-
MME Configuration Management
Changes as of June 29, 2012
-
MME Performance Management
Changes as of June 29, 2012
-
MME Security Management
Changes as of June 29, 2012
IMPORTANT:
Enhancements to Diameter,
GTPP, and RADIUS in release 14.0 are located in the Accounting Management
Changes chapter.
Enhancements to SNMP
MIB in release 14.0 are located in the SNMP MIB Changes chapter.
Enhancements to Web
Element Manager (WEM) in release 14.0 are located in the Web Element Manager
Changes chapter.
Omissions and Corrections
The following lists
of items link to changes found in a previous code drop that were
omitted from the Release Change Reference or to technical corrections
made to previously published content.
Omissions from/Corrections
to September 28, 2012 Content
Omissions from/Corrections
to June 29, 2012 Content
MME Feature Changes
as of May 31, 2013
This section
provides information on MME feature changes in release 14.0.
IMPORTANT:
For more information
regarding features in this section, refer to the MME Administration
Guide for this release.
New MME Features
This section
identifies new MME features available in release 14.0.
eWAG and MME Combination
Support
This release introduces
support for Enhanced Wireless Access Gateway (eWAG) and MME deployed
on the same ASR 5000 chassis.
Modified MME Features
This section
identifies MME features modified in release 14.0.
3G/4G to
4G TAU Security Mode Reject Cause Code
When a Security mode
reject happens for a mapped security context in case of 3G to 4G TAU,
the cause code in TAU reject is now mapped to “Cannot Derive
MS identity” (0x09). This change is specific to 3G/4G
to 4G TAU and does not affect normal TAU.
Previous Behavior: Security
mode reject triggered TAU reject with the cause code “Illegal
ME”.
New Behavior: Security
mode reject triggers TAU reject with the cause code “Cannot
derive MS identity”.
Default Session
Disconnect Reason Changed
Previous Behavior: The
default (catch-all) session disconnect reason for the MME as reported
by the show session
disconnect-reasons command was previously driver-initiated
(186).
New Behavior: The
new default session disconnect reason is mme-driver-inititated
(460).
This provides more clarity when diagnosing disconnect issues in
combo nodes.
Enhanced Signaling
Behavior During SGs Location Update
Previous Behavior: The
MME was rejecting the service request from a different eNodeB with
cause MESSAGE TYPE NOT COMPATIBLE WITH PROTOCOL STATE while waiting
for the TAU complete message from UE.
New Behavior: The
MME now accepts the service request from the eNodeB with a new P-TMSI
before receiving the TAU complete message from the UE.
Improvements to
P-GW Selection After Session Recovery
Previous Behavior: After
session recovery, the gw-selection preferences of colocation and
topology were not honored. During handoffs, when there was no S-GW
change and no sgw-host-name was learned from the peer MME/SGSN,
the MME would select the P-GW with least 'order/priority'
value, as the sgw-host-name was unknown.
New Behavior: The
MME now honors the gw-selection preferences of colocation and topology
while selecting the P-GW at all times (with or without session recovery). If
the S-GW DNS query is successful and the MME detects that there
is no S-GW change, the MME learns the sgw-host-name corresponding
to the S-GW IP address from peer SGSN/MME. This sgw-host-name
is used to select the P-GW during subsequent additional pdn connectivity procedures.
Trace logs now also
display the S-GW and P-GW host names along with the respective IP addresses
of the selected nodes.
Improvements to
S-GW and P-GW Fallback Handling
Previous Behavior: During
Attach and Additional PDN Connectivity requests, the MME treated
cause “EGTP_CAUSE_PEER_NOT_RESPONDING-(100)” as
a P-GW failure and all other causes as S-GW failures.
New Behavior: The
MME now checks the CS bit within the Cause IE received in the Create
Session Response indicating session creation failure. This is checked
in both Attach case as well additional PDN Connectivity case. This
bit is used to determine whether the S-GW or P-GW is responsible
for the failure. Depending on which node failed, the respective
fallback mechanism shall be triggered.
If CS = 1,
then the failure is interpreted as a P-GW failure and P-GW selection
shall be performed as part of fallback logic. If CS = 0,
then the failure is interpreted as an S-GW failure and S-GW selection
shall be performed as part of fallback logic.
Notify Request Signaling
Change to HSS
Previous Behavior: The
MME previously sent a Notify Request message for every new PDN connection.
New Behavior: The
MME now sends Notify Request messages only if the PDN is dynamically
allocated. If PDN-GW Allocation Type for an APN is static in APN
Configuration Profile, then during PDN Connect Procedure, the MME
will not send a Notify Request to the HSS. If Allocation Type is
set to dynamic, then MME will send PDN-GW address in MIP-Home-Agent-Address
in Notify Request to HSS.
Support for Class
Selector IP QoS DSCP Codes
Previous Behavior: The
MME supports the following IP QoS DSCP codes for the S1-MME interface:
AF (Assured Forwarding), BE (Best Effort), and EF (Expedited Forwarding).
New Behavior: Support
is now extended to provide configuration of Class Selector DSCP
codes: CS0, CS1, CS2, CS3, CS4, CS5, CS6, and CS7.
Support for Optional
IEs in Attach Related to SRVCC
Previous Behavior: The
MME previously ignored the following Mobile Station Information
Elements (IEs) sent by a UE:
- Classmark 2
- Classmark 3
- Supported Codecs.
New Behavior: The
above IEs are processed, stored and send to the MSC over the Sv
interface.
Support for Multiple
MME Services with Co-located SGSN Services
Previous Behavior: Configuration
of multiple MME services where each MME service was associated
to a unique SGTP service was previously not supported.
New Behavior: Support
is now extended to handle multiple MME services, each associated
with unique SGTP services. With this new behavior, multiple MME
services and co-located SGSN services have the ability to perform
Gn/Gp based handovers between the respective services.
IMPORTANT:
When co-locating an
SGSN and MME, the MME Service cannot be associated with the same
SGTP service that is used by the SGSN.
MME Command Changes
as of May 31, 2013
This section
provides information on MME command changes in release 14.0.
IMPORTANT:
For more information
regarding commands in this section, refer to the Command Line Interface
Reference for this release.
New MME Commands
This section
identifies new MME commands available in release 14.0.
Modified MME Commands
This section
identifies MME commands modified in release 14.0.
apn-selection-default
The MME now supports
the lowest-context-id keyword to
specify that the APN with the lowest context-ID in the subscription
record which matches the UE-requested PDN type be used as the default
APN when normal APN selection fails.
configure
apn-remap-table <apn_remap_table_name>
apn-selection-default
lowest-context-id
no
apn-selection-default lowest-context-id
s1-mme ip
The MME now supports
the following IP QoS DSCP codes for the S1-MME interface: cs0, cs1, cs2, cs3, cs4,
cs5, cs6, cs7.
configure
context <context_name>
mme-service <service_name>
s1-mme
ip qos-dscp { cs0 | cs1 | cs2 | cs3 | cs4 | cs5 | cs6 | cs7 }
default
s1-mme ip qos-dscp
Where:
-
cs0: Class
Selector 0 PHB
-
cs1: Class
Selector 1 PHB
-
cs2: Class
Selector 2 PHB
-
cs3: Class
Selector 3 PHB
-
cs4: Class
Selector 4 PHB
-
cs5: Class
Selector 5 PHB
-
cs6: Class
Selector 6 PHB
-
cs7: Class
Selector 7 PHB
Deprecated MME Commands
This section
identifies deprecated MME commands that are no longer supported
in release 14.0.
MME Performance Indicator
Changes as of May 31, 2013
This section
provides information on MME performance indicator changes in release 14.0.
IMPORTANT:
For more information
regarding bulk statistics and output fields and counters in this
section, refer to the Statistics
and Counters Reference for this release.
New MME Bulk Statistics
This section
identifies new MME bulk statistics available in release 14.0.
MME Schema
- dedi-brr-activation-nw-attempted
- dedi-brr-activation-nw-success
- dedi-brr-activation-nw-failures
- brr-deactivation-nw-attempted
- brr-deactivation-nw-success
- brr-deactivation-nw-failures
- brr-modification-nw-attempted
- brr-modification-nw-success
- brr-modification-nw-failures
Modified MME Bulk
Statistics
This section
identifies MME bulk statistics modified in release 14.0.
MME Schema
The following bulk statistics
where obsoleted in a previous release of 14.0, but have been made
operational again in this release.
- dedi-brr-activation-ue-attempted
- dedi-brr-activation-ue-success
- dedi-brr-activation-ue-failures
The following bulk statistic
has been renamed in this release.
- Old: s1ap-transdata-cfgtfr New:
s1ap-transdata-mmecfgtfr
Deprecated MME Bulk
Statistics
This section
identifies deprecated MME bulk statistics that are no longer supported
in release 14.0.
SGS-VLR Schema
- reset-ind-tx
- reset-ind-retx
- reset-ind-rx
- reset-ack-tx
- reset-ack-retx
- reset-ack-rx
New MME Output Fields
and Counters
This section
identifies new MME show command output fields and counters available
in release 14.0.
Modified MME Output
Fields and Counters
This section
identifies modified MME show command output fields and counters
available in release 14.0.
Deprecated MME Output
Fields and Counters
This section
identifies deprecated MME output fields and counters that are no
longer supported in release 14.0.
show sgs-service
vlr-status full
The following fields
have been removed from this command.
- Reset Indication
- Reset Ack
These two counters
are still displayed under the show sgs-service statistics
all command.
MME Feature Changes
as of January 31, 2013
This section
provides information on MME feature changes in release 14.0.
IMPORTANT:
For more information
regarding features in this section, refer to the MME Administration
Guide for this release.
New MME Features
This section
identifies new MME features available in release 14.0.
Modified MME Features
This section
identifies MME features modified in release 14.0 and contains two
types of modifications: enhancements and behavior changes. Feature
enhancements are modifications based on customer change requests.
Feature behavior changes are modifications based on software error
corrections (bug fixes) that result in a change in the behavior
of the feature.
Increased SGs Interface
Operational Limits
The limits for various
operational capacities have been increased in this release as described in
the following table.
Table 1. SGs Operational Limits
. |
Previous
Limits (12.2) |
New
Limits |
Maximum
Number of VLRs |
32 |
48 |
Maximum
Number of Pools + Non Pool Areas (combined total) |
8 |
48 |
Maximum
Number of LACs per Pool/Non Pool Area |
16 |
96 |
Maximum
Number of Hash lists per pool area |
32 |
48 |
Maximum
Number of TAC to LAC Mapping Lists |
32 |
64 |
Maximum
Number of mapping per TAC to LAC List |
8 |
8 |
Change in Signaling
When UE is Unreachable
Previous Behavior: The
MME used to send an ATTACH/TAU/Service reject message
when any authentication procedure started by these requests retransmit
the maximum number of times without the UE responding.
New Behavior: If
an authentication request is retransmitted the maximum number of
times, the MME no longer sends a reject for the request (ATTACH/TAU/Service Request)
that triggered the authentication. The reject cause sent was one
that required the UE to be power cycled.The Error Indication with
the following cause codes ( Unknown or already allocated MME UE
S1AP ID, Unknown or already allocated eNB UE S1AP ID, Unknown or inconsistent
pair of UE S1AP ID) will be treated as the equivalent to a UE Context
release request, but without the MME sending back a UE Context Release
Command, as this would result in another error indication being
generated.
Change in Signaling
for UE Security Integrity Algorithm Mismatch
Previous Behavior: If
there was a mismatch between the MME and UE security integrity algorithm,
the MME would continue the call.
New Behavior: The
MME now rejects the call with cause “NAS_EMM_CAUSE_NETWORK_FAILURE” if
there is an Integrity or Encryption Algorithm mismatch.
MME Configuration
Management Changes as of January 31, 2013
This section
provides information on MME configuration command changes in release 14.0.
MME Performance Management
Changes as of January 31, 2013
This section
provides information on MME performance management changes in release 14.0.
IMPORTANT:
For more information
regarding bulk statistics in this section, refer to the Statistics and Counters
Reference for this release.
For more information
regarding commands in this section, refer to the Command Line Interface Reference for
this release.
New MME Bulk Statistics
This section
identifies new MME bulk statistics available in release 14.0.
MME Schema
- dedi-brr-activation-nw-attempted
- dedi-brr-activation-nw-success
- dedi-brr-activation-nw-failures
- brr-deactivation-nw-attempted
- brr-deactivation-nw-success
- brr-deactivation-nw-failures
- brr-modification-nw-attempted
- brr-modification-nw-success
- brr-modification-nw-failures
Modified MME Bulk
Statistics
This section
identifies MME bulk statistics modified in release 14.0.
Deprecated MME Bulk
Statistics
This section
identifies deprecated MME bulk statistics that are no longer supported
in release 14.0.
New MME Performance
Commands
This section
identifies new MME performance commands available in release 14.0.
Modified MME Performance
Commands
This section
identifies MME performance commands modified in release 14.0.
show congestion-control
statistics mme
The following commands
now include separate Rejected and Dropped counters for all call events.
Exec Mode
show congestion-control
statistics mme critical
show congestion-control
statistics mme major
show congestion-control
statistics mme minor
show location-service
statistics
The following commands
have been updated to include the following fields to represent the number
of dropped Provide Subscriber Request and Answer messages respectively:
- PSL Request Dropped
- PSL Answer Dropped
The following fields
have been renamed:
- PSL Request - replaces “PL
Request”
- PSL Answer - replaces “PL
Answer”
Also, the following
fields have been removed as they are unsupported:
- PLR Retries
- LR Request
- LR Answer
- LRR Retries
- LRA Timeouts
- LRA Dropped
Exec Mode
show location-service
statistics all
show location-service
statistics all service service_name
Deprecated MME Performance
Commands
This section
identifies deprecated MME performance commands that are no longer
supported in release 14.0.
MME Security Management
Changes as of January 31, 2013
This section
provides information on MME security management changes in release 14.0.
MME Feature Changes
as of November 7, 2012
This section
provides information on MME feature changes in release 14.0.
IMPORTANT:
For more information
regarding features in this section, refer to the MME Administration
Guide for this release.
New MME Features
This section
identifies new MME features available in release 14.0.
Modified MME Features
This section
identifies MME features modified in release 14.0 and contains two
types of modifications: enhancements and behavior changes. Feature
enhancements are modifications based on customer change requests.
Feature behavior changes are modifications based on software error
corrections (bug fixes) that result in a change in the behavior
of the feature.
SCTP Association
Retry Interval
Previous Behavior: The
SCTP association was retried indefinitely every 10 seconds after
a failure until the service or VLR was removed or the association
comes up.
New Behavior: The
SCTP association is still retried indefinitely after a failure until
the service or VLR is removed or the association comes up. The SCTP
association retry interval is now a value between 10 and 30 second
and is a calculated product of the SCTP Initial Retransmission Timeout
value and the SCTP Max Init re-transmissions. If the calculated
product is beyond the 10 to 30 second range, it is bound to the
range. If SCTP Templates are not configured, the retry interval
is 10 seconds.
Default Cause Code
When VLR Down
Previous Behavior: Combined
TAU/Accept used to send the CS_DOMAIN_NOT_AVAILBALE
(#12) NAS cause code when a VLR was down.
New Behavior: Combined
TAU/Accept now sends the MSC_TEMPORARILY_NOT_REACHABLE
(#10) NAS cause code when a VLR is down.
MME Configuration
Management Changes as of November 7, 2012
This section
provides information on MME configuration command changes in release 14.0.
MME Performance Management
Changes as of November 7, 2012
This section
provides information on MME performance management changes in release 14.0.
IMPORTANT:
For more information
regarding bulk statistics in this section, refer to the Statistics and Counters
Reference for this release.
For more information
regarding commands in this section, refer to the Command Line Interface Reference for
this release.
New MME Bulk Statistics
This section
identifies new MME bulk statistics available in release 14.0.
Modified MME Bulk
Statistics
This section
identifies MME bulk statistics modified in release 14.0.
Deprecated MME Bulk
Statistics
This section
identifies deprecated MME bulk statistics that are no longer supported
in release 14.0.
New MME Performance
Commands
This section
identifies new MME performance commands available in release 14.0.
Modified MME Performance
Commands
This section
identifies MME performance commands modified in release 14.0.
show crypto statistics
The following new field
has been added to track the total errors due to authentication failures
during IKE_AUTH exchanges.
Exec Mode
show crypto statistics
Deprecated MME Performance
Commands
This section
identifies deprecated MME performance commands that are no longer
supported in release 14.0.
MME Security Management
Changes as of November 7, 2012
This section
provides information on MME security management changes in release 14.0.
MME Feature Changes
as of September 28, 2012
This section
provides information on MME feature changes in release 14.0.
IMPORTANT:
For more information
regarding features in this section, refer to the MME Administration
Guide for this release.
New MME Features
This section
identifies new MME features available in release 14.0.
Location Services
LoCation Services (LCS)
is a 3GPP standards-compliant feature that enables the system MME
to collect and use or share location (geographical position) information
for connected UEs in support of a variety of location services.
Refer to the Location Services chapter
of the MME Administration
Guide for more information about this feature.
Modified MME Features
This section
identifies MME features modified in release 14.0 and contains two
types of modifications: enhancements and behavior changes. Feature
enhancements are modifications based on customer change requests.
Feature behavior changes are modifications based on software error
corrections (bug fixes) that result in a change in the behavior
of the feature.
EIR Endpoint Behavior
Change
Omitted Content: The
following behavior changed in the September 28, 2012 release, but
was omitted from this document until now:
Previous Behavior: The
MME did not support association of the same EIR endpoint name to
two different mme-hss-services.
New Behavior: The
same EIR endpoint name can now be associated with two different
HSS endpoints.
Attach/TAU
Attach Reject Behavior Change
Omitted Content: The
following behavior changed in the September 28, 2012 release, but
was omitted from this document until now:
Previous Behavior: For
ATTACH/TAU procedures, if the ATTACH REQUEST passes integrity
checks, but an IMSI mismatch with SGSN occurs, the MME rejects the
call with cause code #3: Illegal UE.
New Behavior: For
ATTACH procedures, if the ATTACH REQUEST passes integrity checks,
but an IMSI mismatch with SGSN occurs, then MME assumes that MME mapping
is correct and proceeds with authentication with that IMSI. For
TAU ATTACH procedures, the cause code for reject has been changed
to #9: UE identity cannot be derived by the network.
Congestion Overload
Behavior Change
Omitted Content: The
following behavior changed in the September 28, 2012 release, but
was omitted from this document until now:
Previous Behavior: With
a congestion control profile set to reject combined-attaches at
a specific threshold, calls were dropped without a reject cause
code.
New Behavior: The
NAS reject cause code due to congestion for attach-reject, TAU-reject,
and service-reject call events is now displayed as CONGESTION (#16).
APN OI Used in Create
Session Request Behavior Change
Omitted Content: The
following behavior changed in the September 28, 2012 release, but
was omitted from this document until now:
Previous Behavior: When
a roamer attached to a MME, the MME always predicted the visitor/IMSIs
MNC to be 3 digits or 2 digits based on the MNC length of MME PLMN
and thereby did not accurately calculate the IMSIs MNC. This could
result in an incorrect MNC in the APN OI sent in the Create Session
Request/Attach Accept message.
New Behavior: A
table is now maintained internally by the MME for PLMNs with valid
3 digit MNCs as per Telecommunication standards. All the MNCs which
are not present in this table will be considered as 2 digit MNCs.
SGs Context Allocation
Failure Behavior Change
Omitted Content: The
following behavior changed in the September 28, 2012 release, but
was omitted from this document until now:
Previous Behavior: Numerous
errors were reported per subscriber when the MME failed to allocate
an SGs context.
New Behavior: The “Could
not register UE Context with SGS” error message is no longer
reported under these circumstances.
The “Failed
to allocate SGS context” error message has been downgraded
from ERROR to UNUSUAL.
S1-HO During Attach
Procedure Behavior Change
Omitted Content: The
following behavior changed in the September 28, 2012 release, but
was omitted from this document until now:
Previous Behavior: The
MME did not support S1-HO during Attach Procedure.
New Behavior: S1-HO
is now supported during initial attach on the condition that the
S1-HO is initiated to the same TAC if attach complete has not yet
been received. Also, any pending dedicated bearer requests will
be rejected during this procedure.
If the attach complete
was not yet received, the UE cannot change the TAC.
Any dedicated bearer
procedures started during S1-HO during initial attach are aborted.
Indirect forwarding
for user-data is not supported during this timeframe.
Error Handling During
S10 Handover Behavior Change
During an S10 handover,
when the source MME sends a DNS query for the target MME, and the
address in the DNS response is the same as that of an S-GW with
which the source MME has already communicated, the source MME now
rejects the handover with a Handover Preparation Failure message.
VLR Offload Behavior
Change
New Behavior: When
Initial UE message is received for a subscriber that has already
been offloaded, the procedure will be completed and UE will not
be offloaded again.
Previous Behavior: In
previous releases, when Initial UE message is received for a subscriber
that has already been offloaded, the UE would be offloaded again
after completing the procedure.
Zone Code Roaming
Restrictions Behavior Change
To minimize HSS signaling,
the MME has changed when zone code restrictions are applied.
New Behavior: Locally
configured zone code restrictions are applied before attempting
to authenticate the UE.
Previous Behavior: The
zone codes provided by the HSS is given preference over the locally
configured values. As a result, the restrictions are applied after
an Update Location Answer (ULA) is received from the HSS even if
there is no HSS-based restrictions implemented.
MME Configuration
Management Changes as of September 28, 2012
This section
provides information on MME configuration command changes in release 14.0.
IMPORTANT:
For more information
regarding commands in this section, refer to the Command Line Interface
Reference for this release.
New MME Configuration
Commands
This section
identifies new MME commands available in release 14.0.
associate
This command associates
or disassociates supportive interfaces or services with a Location service.
LoCation Services (LCS) are used to determine the geographic location
of a UE.
Location Service Configuration
Mode
associate { diameter { dictionary
standard | endpoint }
location-service
This command creates
a Location service or configures an existing Location service and enters
the Location Service Configuration Mode. LoCation Services (LCS)
are used to determine the geographic location of a UE.
Context Configuration
Mode
[ no ] location-service service_name [ -noconfirm ]
sgs-cause-code-mapping
This command configures
the EMM reject cause code to send to a UE when an SGs cause code
is received.
Call Control Profile
Configuration Mode
sgs-cause-code-mapping sgs_cause_code emm-cause-code emm_cause_code
remove sgs-cause-code-mapping sgs-cause
Modified MME Configuration
Commands
This section
identifies MME commands modified in release 14.0.
associate
This command has been
updated with a location-service keyword
to associate a location service with this MME service. Only one
location service should be associated with an MME Service.
MME Service Configuration
Mode
associate { { egtp-service egtp_svc_name | egtp-sv-service egtp_sv_svc_name | hss-peer-service hss_svc_name | location-service location_svc_name | lte-emergency-profile profile_name | network-global-mme-id-mgmt-db | sctp-param-template template_name | sgs-service sgs_svc_name | sgtpc-service sgtpc_svc_name } [ context ctx_name ] | subscriber-map map_name | tai-mgmt-db database_name }
no associate { egtp-service | egtp-sv-service | hss-peer-service | location-service | lte-emergency-profile | network-global-mme-id-mgmt-db | sctp-param-template | sgs-service | sgtpc-service | subscriber-map | tai-mgmt-db }
local-cause-code-mapping
This command has been
enhanced to enable configuration of cause codes sent to the UE when
there is an APN mismatch, when the VLR is down (either not configured,
or the link is not up), or when the VLR is not reachable (no response
from VLR).
These mappings are applied
at the call control profile level, with the exception of apn-mismatch,
which can also be applied at the MME service level for cases where
a call control profile could not be applied to a call.
An EMM cause code can
be set for each reject scenario using the emm-cause-code keyword.
Call Control Profile
Configuration Mode
local-cause-code-mapping
apn-mismatch emm-cause-code { eps-service-not-allowed-in-this-plmn | esm-failure
esm-cause-code unknown-apn | no-suitable-cell-in-tracking-area | plmn-not-allowed | roaming-not-allowed-in-this-tracking-area | tracking-area-not-allowed }
local-cause-code-mapping
vlr-down emm-cause-code { congestion | cs-domain-unavailable | imsi-unknown-in-hlr | msc-temp-unreachable | network-failure }
local-cause-code-mapping
vlr-unreachable emm-cause-code { congestion | cs-domain-unavailable | imsi-unknown-in-hlr | msc-temp-unreachable | network-failure }
MME Service Configuration
Mode
local-cause-code-mapping
apn-mismatch emm-cause-code { eps-service-not-allowed-in-this-plmn | esm-failure
esm-cause-code unknown-apn | no-suitable-cell-in-tracking-area | plmn-not-allowed | roaming-not-allowed-in-this-tracking-area | tracking-area-not-allowed }
Deprecated MME Configuration
Commands
This section
identifies deprecated MME commands that are no longer supported
in release 14.0.
MME Performance Management
Changes as of September 28, 2012
This section
provides information on MME performance management changes in release 14.0.
IMPORTANT:
For more information
regarding bulk statistics in this section, refer to the Statistics and Counters
Reference for this release.
For more information
regarding commands in this section, refer to the Command Line Interface Reference for
this release.
New MME Bulk Statistics
This section
identifies new MME bulk statistics available in release 14.0.
MME Schema
- ded_brr-deactivation-mme-attempted
- ded_brr-deactivation-mme-success
- ded_brr-deactivation-mme-failures
- ded_brr-deactivation-pgw-attempted
- ded_brr-deactivation-pgw-success
- ded_brr-deactivation-pgw-failures
- ded_brr-deactivation-ue-attempted
- ded_brr-deactivation-ue-success
- ded_brr-deactivation-ue-failures
- dflt_brr-deactivation-mme-attempted
- dflt_brr-deactivation-mme-success
- dflt_brr-deactivation-mme-failures
- dflt_brr-deactivation-pgw-attempted
- dflt_brr-deactivation-pgw-success
- dflt_brr-deactivation-pgw-failures
- dflt_brr-deactivation-ue-attempted
- dflt_brr-deactivation-ue-success
- dflt_brr-deactivation-ue-failures
- emm-msgtx-attach-accept-imsi-unknown
- emm-msgtx-attach-accept-no-msc
- emm-msgtx-attach-accept-nw-fail
- emm-msgtx-attach-accept-congestion
- emm-msgtx-attach-accept-no-cs
- emm-msgtx-tau-accept-imsi-unknown
- emm-msgtx-tau-accept-no-msc
- emm-msgtx-tau-accept-nw-fail
- emm-msgtx-tau-accept-congestion
- emm-msgtx-tau-accept-no-cs
Modified MME Bulk
Statistics
This section
identifies MME bulk statistics modified in release 14.0.
Deprecated MME Bulk
Statistics
This section
identifies deprecated MME bulk statistics that are no longer supported
in release 14.0.
MME Schema
- dedi-brr-activation-ue-attempted
- dedi-brr-activation-ue-success
- dedi-brr-activation-ue-failures
- brr-deactivation-mme-attempted
- brr-deactivation-mme-success
- brr-deactivation-mme-failures
- brr-deactivation-pgw-attempted
- brr-deactivation-pgw-success
- brr-deactivation-pgw-failures
- brr-deactivation-ue-attempted
- brr-deactivation-ue-success
- brr-deactivation-ue-failures
New MME Performance
Commands
This section
identifies new MME performance commands available in release 14.0.
show location-service
The following commands
show configuration information and statistics relating to the LoCation
Services (LCS) feature.
Exec Mode
show location-service
service all
show location-service
statistics all
show mme-service
id summary
This command displays
the current number of MME-assigned and eNodeB-assigned S1AP session
IDs.
Exec Mode
show mme-service id
summary
Modified MME Performance
Commands
This section
identifies MME performance commands modified in release 14.0.
monitor subscriber
The following output
fields now show “n/a” (Not applicable)
instead of being blank when issuing this command.
Exec Mode
monitor subscriber
show mme-service
all
The following field
has been added to show the name of the location service to which
the MME service has been associated.
Exec Mode
show mme-service all
show mme-service
db record imsi
A new Trace Data group
of fields displays trace data if it is provided as part of the UE
subscription data from the HSS. For information about this trace
data provided, refer to section 5 of 3GPP TS 32.422.
Exec Mode
show mme-service db
record imsi
show mme-service
enodeb-association
A new eNodeB Type field
has been added to display the type of eNodeB, either Home or Macro,
as reported by the eNodeB.
Exec Mode
show mme-service enodeb-association
full
A
path-info keyword
has been added to display S1 path association information. When
issued, the following information is displayed for all eNodeBs associated
with MME services on the system:
- Path Source IP Address
- Path Destination IP Address
- Path State
Exec Mode
show mme-service enodeb-association
path-info
show mme-service
statistics
The following new Total
EMM Control Messages - Sent - Attach Accept: output fields have been
added to this command:
- IMSI Unknown in HSS
- MSC Unreachable
- Network Failure
- CS Domain Not Available
- Congestion
The following new Total
EMM Control Messages - Sent - TAU Accept: output fields have been
added to this command:
- IMSI Unknown in HSS
- MSC Unreachable
- Network Failure
- CS Domain Not Available
- Congestion
The output of this
command has been updated to show separate dedicated and default
bearer deactivation statistics as follows:
- MME Initiated Dedicated
Bearer Deactivations
- PGW/SGW Initiated
Dedicated Bearer Deactivations
- UE Initiated Dedicated
Bearer Deactivations
- MME Initiated Default
Bearer Deactivations
- PGW/SGW Initiated
Default Bearer Deactivations
- UE Initiated Default
Bearer Deactivations
The following output
fields have been deprecated from this command:
- MME Initiated Bearer
Deactivations
- PGW/SGW Initiated
Bearer Deactivations
- UE Initiated Bearer
Deactivations
Exec Mode
show mme-service statistics
show sgs-service
vlr-status full
The following field
has been updated to show the path status information for each association,
indicating either UP or DOWN:
Exec Mode
show sgs-service vlr-status
full
Deprecated MME Performance
Commands
This section
identifies deprecated MME performance commands that are no longer
supported in release 14.0.
MME Security Management
Changes as of September 28, 2012
This section
provides information on MME security management changes in release 14.0.
MME Feature Changes
as of July 31, 2012
This section
provides information on MME feature changes in release 14.0.
MME Configuration
Management Changes as of July 31, 2012
This section
provides information on MME configuration command changes in release 14.0.
MME Performance Management
Changes as of July 31, 2012
This section
provides information on MME performance management changes in release 14.0.
IMPORTANT:
For more information
regarding bulk statistics in this section, refer to the Statistics and Counters
Reference for this release.
For more information
regarding commands in this section, refer to the Command Line Interface Reference for
this release.
New MME Bulk Statistics
This section
identifies new MME bulk statistics available in release 14.0.
eGTP-C Schema
The following eGTP-C
Schema bulk statistics have been introduced in this release:
- tun-sent-stoppagingind
- tun-recv-stoppagingind
Modified MME Bulk
Statistics
This section
identifies MME bulk statistics modified in release 14.0.
Deprecated MME Bulk
Statistics
This section
identifies deprecated MME bulk statistics that are no longer supported
in release 14.0.
New MME Performance
Commands
This section
identifies new MME performance commands in release 14.0.
Modified MME Performance
Commands
This section
identifies MME performance commands modified in release 14.0.
show congestion-control
statistics mme full
The output of this
command to include statistics for the emergency events and voice
calls that were excluded from the congestion control policy:
- Excluded Emergency
Events
- Excluded Voice Events
Exec Mode
show congestion-control
statistics mme full
Deprecated MME Performance
Commands
This section
identifies deprecated MME performance commands that are no longer
supported in release 14.0.
MME Security Management
Changes as of July 31, 2012
This section
provides information on MME security management changes in release 14.0.
MME Feature Changes
as of June 29, 2012
This section
provides information on MME feature changes in release 14.0.
IMPORTANT:
For more information
regarding features in this section, refer to the MME Administration
Guide for this release.
New MME Features
This section
identifies new MME features available in release 14.0.
APN Override
This release provides
enhancements to enable operators to override the Access Point Name (APN)
requested by the UE. The functionality to provide configurable remapping
provides the operator flexible options with APN handling locally
rather than requiring changes in the external systems. Refer to
the APN Override chapter
of the MME Administration
Guide for more information about this feature.
Closed Subscriber
Groups
The MME now provides
support for Closed Subscriber Groups (CSG). This enables the MME
to provide access control and mobility management for subscribers
who are permitted to access one or more CSG cells of the PLMN as
a member of the CSG for a Home eNodeB (HeNB). Refer to the Closed Subscriber Group chapter
of the MME Administration Guide for
more information about this feature.
Configurable Target
RNC-ID to Target eNodeB-ID Mapping for Inter-RAT Handovers
The MME now provides
the ability to configure how the fields in the Target RNC-ID are mapped
to the Target eNodeB fields during a UMTS to E-UTRAN relocation.
Refer to the mapping command
in the MME Service Configuration Mode in the Command Line Interface
Reference for more information.
DNS Gateway Selection
- Topology-Match and Weight
In previous releases,
MME supported gateway selection based on topological closeness and a
round-robin method of weight distribution if equally viable pairs
of gateways were selected. In this release, the MME can now support
statistical distribution of calls to multiple S-GW/P-GW nodes
(in accordance with 3GPP TS 29.303) when multiple records in a topological/co-location match
have the same value for the ‘order’ field.
The preferences/weights
of the P-GW/S-GW from the NAPTR/SRV resource records
are used for the load balancing as configured using the gw-selection command
in the call-control-profile mode.
This provides a method
of distributing calls according to the capacity available on each gateway.
Dual Stack Handover
Support for S3/S4 SGSN
The MME now supports
inter-RAT handovers between the MME and S3/S4 SGSN for
dual stack (dual address) IP4v/IPv6 PDN connections.
Heuristic and Intelligent
Paging
This release provides
enhancements to enable operators to minimize the paging load in
the EUTRAN network by specifying different paging profiles for different
types of traffic. The pace, volume, and type of paging requests
sent to eNodeBs can now be controlled. Refer to the Heuristic and Intelligent
Paging chapter of the MME
Administration Guide for more information about this feature.
Idle-mode Signaling
Reduction
Idle-mode Signaling
Reduction (ISR) allows a UE to be registered on (and roam between) E-UTRAN
and UTRAN/GERAN networks while reducing the frequency of
TAU and RAU procedures and overall signaling.
Refer to the Idle-mode Signaling
Reduction chapter of the MME Administration
Guide for more information about this feature.
Interworking Enhancements
S4-SGSN Handover Support
MME to 2G SGSN (GERAN)
Handovers: The MME now supports E-UTRAN-to-GERAN (4G MME to
2G SGSN) handovers over the S3 interface.
2G SGSN (GERAN) to
MME Handovers: The MME now supports GERAN-to-E-UTRAN (2G SGSN
to 4G MME) handovers over the S3 interface.
MME to 2G SGSN (GERAN)
PS Handovers: The MME now supports E-UTRAN-to-GERAN (4G MME
to 2G SGSN) PS handovers over the Gn/Gp interface.
2G SGSN (GERAN) to
MME PS Handovers: The MME now supports GERAN-to-E-UTRAN (2G
SGSN to 4G MME) PS handovers over the Gn/Gp interface.
The MME now supports
PS handover-related SGTPC Information Elements during E-UTRAN to/from
GERAN PS Handovers.
Relocate UE to Specific
MME
The MME now supports
the ability to release a UE, and cause it to attach to another particular
MME within the pool. Once an IMSI is configured to be relocated
to a different MME, that configuration shall exist till it is removed.
The MME allows for up to 20 such IMSI to be configured. The UE must
be in the EMM-REGISTERED or ECM-CONNECTED state in order to be relocated.
If the UE is in ECM-CONNECTED
state, the MME uses the GUTI relocation command to change the GUTI
to a configured GUTI. Once confirmation is received from the UE,
the UE is detached with detach type “re-attach required”.
If the GUTI relocation procedure fails, the UE is still detached
from the network.
PDN Type Control
PDN Type Control enables
the MME to override the requested Packet Data Network (PDN) type
based on the inbound roamer PLMN, and assign the UE to an IPv4 only
or IPv6 only PDN.
If a UE requests an
IPv4v6 PDN, it can be downgraded to an IPv4- or IPv6-only address. The
MME signals the appropriate cause to the UE to account for the PDN
type change.
PDN Type Control is
configured in a call control profile that is applied via an operator policy.
Refer to the pdn-type-override command
in the Call Control Profile
Configuration Mode chapter of the Command Line Interface Reference for
more information.
SGs Architecture
Enhancements
In order to realize
the full potential of the current architecture in terms of capacity
and robustness (redundancy), the MME can now establish multiple
logical associations towards the same MSC/VLR.
Each individual VLR
can now be defined with up to 10 separate associations to a single MSS
pool. Each of these associations support SCTP multi-homing by defining
a primary/secondary IP address. Application layer messages
are transmitted in a balanced fashion across available associations
for a particular VLR. If a complete failure of the underlying SCTP
layer for a given association (for example, both SCTP paths in a
multi-homed configuration) occurs, the VLR association is removed
as a candidate for application message transmission until it recovers. A
given MSC (VLR) will remain available as long as at least one related
association remains available.
To implement this change,
each vlr defined using the vlr command
in the MME SGs Service Mode can now be configured up to 10 times
with the same name corresponding with the 10 associations.
VLR Offload Enhancements
The MME now supports
the ability to perform a controlled release of UEs when a VLR connection
becomes unavailable, as well as the ability to reattach CSFB (SMS-only)
UEs when a failed VLR becomes responsive again.
Refer to the sgs vlr-failureand sgs vlr-recover commands
in the Exec Mode chapter of the Command Line Interface Reference
for more information.
In Release 12.2, the
MME introduced a sgs
offload sgs-serviceExec Mode command to passively offload
UEs for a specific VLR. This capability enables operators to preemptively
move subscribers away from an SGs interface associated with an MSS
which is planned for maintenance mode.
These features require
a valid license key to be installed. Contact your Cisco Account
or Support Representative for information on how to obtain a license.
Modified MME Features
This section
identifies MME features modified in release 14.0 and contains two
types of modifications: enhancements and behavior changes. Feature
enhancements are modifications based on customer change requests.
Feature behavior changes are modifications based on software error
corrections (bug fixes) that result in a change in the behavior
of the feature.
APN-specific APN-OI
Replacement Behavior Change
New Behavior: The
MME now uses the APN-OI replacement value provided by the HSS to
construct the FQDN for DNS resolution.
Previous Behavior: The
MME ignored this value in previous releases.
Application-specific
Overload Controls
A new overload control
framework has been introduced to provide additional flexibility
to configure application specific handling of overload (congestion)
conditions. As a part of this framework, it is now possible to define
three threshold levels - critical, major and minor. The operator
can define specific threshold values for each of these levels. Each
of these levels in turn are associated with congestion action profiles
in which application-specific control procedure handling is defined.
These enhancements
enable the operator to address localized problems in the network
by intelligently invoking congestion procedures on a selective basis.
Application-specific
overload control is configured in the Global Configuration Mode
using the congestion-control commands.
The congestion action profiles which define the actions to take
once a congestion condition has occurred are configured in the Congestion
Action Profile Configuration mode. Refer to the Global Configuration Mode chapter
and Congestion Action
Profile Configuration Mode chapter of the Command Line Interface
Reference for more information.
Cause Information
Element Behavior Change
To distinguish errors
in the message level IE versus errors in the grouped IE within the message,
the Cause IE is now extended to include a flag indicating whether
the rejection cause is due to error in the grouped IE within the
message or due to error in IEs at message level. The bits are:
- BCE (Bearer Context
IE Error): If this bit is set to 1, it indicates that the corresponding
rejection cause is due to the error in the Bearer Context IE.
- PCE (PDN Connection
IE Error): If this bit is set to 1, it indicates that the corresponding rejection
cause is due to the error in the PDN Connection IE.
Emergency Attach
Message Behavior Changes
The IMSI is now conditional
in the following GTPv2 messages for Emergency attach sessions:
- Relocation Cancel Request
- Change Notification
Request
- Trace Session Activation
Request
Enhanced Load Rebalancing
Controls
To address the significant
signaling events that might be generated when performing load rebalancing
across MMEs in a pool, the operator can now specify the percentage
of UEs to offload and a time duration in which the rebalancing (offload)
procedure occurs.
Extended RNC-ID
IE Support
Corrected Content: This
section includes corrections to previously published content. The
previous content stated that “The MME now supports RNC-ids
from 0-64 kilobytes instead of the earlier 0-32 kilobytes range”,
which is incorrect.
Support for the Extended
RNC-id IE (Information Element) in this release extends the RNC-id
range from 0-4095 to 0-65535. The MME will now process the message,
construct the Target ID value from the extensions and proceed with
the SRNS relocation procedure.
Previously the MME
would reject the Handover Required messages received over S1ap when
the RNC-id within the Target ID was greater than 4095 bytes. The
MME also ignored Forward Relocation Requests received on Gn/Gp
interface when the RNC-id within the Target ID was greater than
4095 bytes.
Heuristic Paging
Behavior Change
Previous Behavior: If
heuristics paging is turned on for the mme-service the following
heuristics paging behavior is used:
1. Page the last eNodeB
from which the UE contacted the MME in the last TAI from which the
UE contacted the MME.
2. Page all eNodeBs
in the last TAI from which the UE contacted the MME.
3. Page all eNodeBs
in all TAIs present in the TAI list assigned to the UE.
New behavior: For
paging requests for Circuit Switch (CS) calls, the MME does not
follow this staged paging behavior. Instead, it follows the standards-defined
paging mechanism of paging all eNodeBs in all TAIs present in the
TAI list assigned to the UE (all-enb-all-tai). Only one attempt
is made with no retries.
Inter-RAT Context-ID
Mismatch Behavior Change
The MME can now be
configured to ignore Context-Identifier mismatches between the HSS and
HLR for a given subscriber during inter-RAT procedures. If enabled,
the MME uses the Context-ID from the HSS to override the Context-ID
from the HLR. If this option is disabled (default), the MME drops
the PDN when there is a Context-ID mismatch.
Refer to the policy inter-rat command
in the MME Service Mode Configuration chapter of the Command Line
Interface Reference for more information.
Licensing Changes
The following features
are now enabled by optional licenses:
- Circuit Switch Fall
Back
- VLR Offload
- Location Change Reporting.
Location Reporting
to PGW Behavior Change
The MME now sends an
S11 Change Notification to the PGW only when a TAI/ECGI change
occurs. The MME now reports only the information requested by the
PGW, either the TAI or ECGI. To accomplish this, the MME maintains
separate timestamps for TAI and ECGI at the UE level and a single
timestamp for ULI at the PDN context level. In addition to this,
counters are maintained at both UE and PDN context to enable location
changes that happens within a second.
NAS Compliance with
3GPP Release 9
The following changes
have been implemented in support of 3GPP TS 24.301 V9.5.0 (2010-12):
- Accepting all optional
IEs by the parser.
- Triggering of authentication
procedure if a TAU message fails integrity checks.
- Processing of EPS_Bearer
Status IE in Extended Service request.
- Accepting “Add
packet filters to existing TFT” (ADD_TFT_TO_EXISTING_FILTERS) operation
code in the Traffic flow aggregate IE in a EPS BEARER MODIFICATION
request.
Peer SGSN Behavior
Change
Multiple peer-sgsn
RNC-ID records can now be configured (using the peer-sgsn command
in the MME Service Configuration Mode) for the same MCC/MNC/RNC,
each with different IP addresses. During a handover, if the initial
peer SGSN rejects the forward relocation request, the MME will step
through any alternate peer SGSNs to attempt the handover.
RFSP Override
The MME can now be
configured to adjust or override the RAT Frequency Selection Priority (RFSP)
for subscribers based on the following criteria:
- UE usage setting (voice
centric, data centric)
- Voice domain preference
(CS voice only, CS voice preferred, IMS PS voice preferred, IMS PS
voice only).
RFSP Override is configured
in a call control profile that is applied via an operator policy. Refer
to the rfsp-override
ue-settings command in the Call Control Profile
Configuration Mode chapter of the Command Line Interface Reference for
more information.
S11 Interface Enhancements
The following enhancements
have been made relating to the S11 interface:
-
When the MME receives
a Delete-Bearer-Request (dedicated BRR delete, PDN delete or UE
detach) while it is waiting for a Release-Access-Bearer response,
it will now perform the following:
- If the Delete-Bearer-Request
corresponds to a dedicated BRR deletion or additional PDN deletion,
the MME replies to the Delete-Bearer-Request and then attempt the rel-access-brr
transaction again.
- If the Delete-Bearer-Request
corresponds to the last PDN - UE detach, the MME aborts the IM entry
procedure and then proceed towards UE detach.
Previously, when the
MME received a Delete-Bearer-Request while it was waiting for a Release-Access-Bearer
response, the Release-Access-Bearer transaction was aborted and
the Delete-Bearer-Indication was being sent to MME-App.
- The MME now supports
S11 'Failed Bearer Contexts' IE received in the Delete-Bearer-Request
message. This IE may be included if the request corresponds to an
MME-initiated bearer deactivation procedure. This IE must contain
the list of failed bearers if the partial Bearer Contexts included
in the Delete Bearer Command message could not be deleted at the
P-GW. The Failed Bearer Contexts IE is included by P-GW in cases
where the P-GW has implicitly deleted the bearer context, but failed
to inform the peer node about it.
SCTP Multihoming
Behavior Change
Previous Behavior:
When an SCTP association is established and then a secondary IP
addresses was added or removed, the SCTP connection would be terminated.
New Behavior: Now
when a secondary IP addresses is added to an established SCTP association,
an ASCONF chunk is sent to the peer indicating if an IP was added
or removed.
SRVCC Handover Behavior
Change
During SRVCC Handover,
if the MME receives a HANDOVER CANCEL from the source eNodeB during
the handover preparation phase, it will now respond with a HANDOVER CANCEL
ACK to the source eNB. The MME will send a PS to CS Cancel to the
MSC and receive a PS to CS CANCEL ACK in response. If the PS to
CS CANCEL ACK has the Service Continuity flag set, the MME will
notify the UE to start the session re-establishment procedure by sending
it a Notification message with the value “SRVCC handover
cancelled, IMS session re-establishment required”.
TAU Updates Behavior
Change
Previous Behavior: S-GW
relocation occurred irrespective of TAU update type.
New behavior: S-GW
selection and relocation is not triggered if the TAU update type
is 'PERIODIC UPDATING'.
Timezone Reporting
Behavior Change
Previous Behavior: The
timezone IE was sent in all S11 messages.
New behavior: The
timezone IE is now sent in S11 messages only if there is change
in timezone such as due to DST (system clock) change or configuration
change at the TAI DB Management or TAI DB Object Configuration Mode level.
MME Configuration
Management Changes as of June 29, 2012
This section
provides information on MME configuration command changes in release 14.0.
IMPORTANT:
For more information
regarding commands in this section, refer to the Command Line Interface
Reference for this release.
New MME Configuration
Commands
This section
identifies new MME commands available in release 14.0.
apn-remap
This command provides
the ability to override the APN requested by the UE based on the network
identifier or operator identifier.
APN Remap Table Configuration
Mode
apn-remap { network-identifier apn_net_id { new-ni new_apn_net_id | operator-identifier apn_op_id new-ni new_apn_net_id { new-oi new_apn_op_id | value-for-oi-mcc mcc | value-for-oi-mnc mnc } | value-for-ni-wc new_apn_net_id } | operator-identifier apn_op_id { new-oi new_apn_op_id | value-for-oi-mcc mcc | value-for-oi-mnc mnc } }
cc
This command provides
the ability to override the APN requested by the UE based on the charging
characteristics.
APN Remap Table Configuration
Mode
cc behavior bit_value profile index_bit apn-remap network-identifier apn_net_id new-ni new_apn_net_id
congestion-action-profile
This command creates
an action profile for MME critical, major and minor congestion thresholds
for the Application-specific Overload Control feature. The profile
defines the action to be taken when these thresholds are exceeded.
For information on setting
the action to be taken within this profile, see the Congestion Action Profile
Configuration Mode Commands chapter in the Command Line Interface Reference.
LTE Policy Configuration
Mode
[ no ] congestion-action-profile profile_name
csg-change-notification
This command enables
or disables the Closed Subscriber Group (CSG) Information reporting
(notification) mechanism on the MME.
MME Service Configuration
Mode
[ default | no ] csg-change-notification
diameter suppress
The MME can now be
configured to restrict the sending of the Notify-Request-Message
to the HSS. By default, the Notify-Request-Message is sent to the
HSS. This can be used to control whether handover to non-3GPP access
can occur.
HSS Peer Service Configuration
Mode
[ no ] diameter
suppress notify-request
isr-capability
This new command enables
or disables the Idle mode Signaling Reduction (ISR) feature on the
MME service.
MME Service Configuration
Mode
[ no | default ] isr-capability
local-cause-code-mapping
This command enables
or disables the Closed Subscriber Group (CSG) Information reporting
(notification) mechanism on the MME.
MME Service Configuration
Mode
local-cause-code-mapping
{ congestion emm-cause-code { congestion [ esm-cause-code { congestion | insufficient-resources | service-option-temporarily-out-of-order } ] | eps-service-not-allowed-in-this-plmn | network
failure | no-suitable-cell-in-tracking-area | plmn-not-allowed | roaming-not-allowed-in-this-tracking-area | tracking-area-not-allowed } | newcall-policy-restrict
emm-cause-code emm_cause_code | restricted-zone-code
emm-cause-code emm_cause_code }
mapping
This command configures
how the MME maps the Target RNC-ID fields to the Target eNodeB-ID
and TAC fields for Inter-RAT Gn/Gp handovers.
MME Service Configuration
Mode
mapping rncid-to-enbid { maptype-default-includes-only-enb | maptype1-includes-enb-tai }
mme relocate-ue imsi
This command enables
the operator to detach a UE from the current MME and cause it to reattach
to another MME in the pool.
Exec Mode
mme relocate-ue imsi imsi new-guti mme-group-id group_id mme-code mme_code m-tmsi mtmsi
network-name
This command configures
the long (full) and short network name used in the Long and Short network
name IE in the EMM Information message that is sent to the UE from
the MME.
LTE TAI Management
Database Configuration Mode
and
LTE TAI Management
Object Configuration Mode
[ no ] network-name [ full full_name | short short_name ]
paging-map
This command has been
added in support of the Heuristic and Intelligent Paging feature.
It creates a paging map or specifies an existing paging map and
enters the Paging Map Configuration Mode.
LTE Policy Profile
Configuration Mode
[ no ] paging-map paging_map_name [ -noconfirm ]
The following command
is contained within this new mode:
[ no ] precedence precedence traffic-type { cs | ps } paging-profile paging_profile_name
Paging
Map Configuration Mode commands are defined in the LTE Paging Map Configuration
Mode Commands chapter of the Command Line Interface Reference.
paging-profile
This command has been
added in support of the Heuristic and Intelligent Paging feature.
It creates a paging profile or specifies an existing paging profile
and enters the Paging Map Configuration Mode.
LTE Policy Profile
Configuration Mode
[ no ] paging-profile paging_profile_name [ -noconfirm ]
The following command
is contained within this new mode:
[ no ] paging-stage level match-criteria { ue-contact-time seconds | all } action { last-n-enb-last-tai
max-n-enb value | all-enb-last-tai | all-enb-all-tai } t3413-timeout seconds max-paging-attempts attempts
Paging
Profile Configuration Mode commands are defined in the LTE Paging Profile Configuration
Mode Commands chapter of the Command Line Interface Reference.
pdn-type-override
This command configures
the MME to override the requested Packet Data Network (PDN) type
based on the inbound roamer PLMN, and assign the UE to an IPv4-only
or IPv6-only PDN.
This override can be
applied based on the type of access technology.
Call Control Profile
Configuration Mode
[ remove ] pdn-type-override
ipv4v6 { ipv4 | ipv6 } access-type { eps | grps | umts }
sgs vlr-failure
This command enables
the active detach of UEs connected to a VLR when the VLR becomes
unavailable.
Exec Mode
[ no ] sgs
vlr-failure sgs-service sgs_svc_name duration minutes backoff-timer seconds [ -noconfirm ]
sgs vlr-recover
This command enables
active recovery of Circuit Switched Fall Back (SMS-only) UEs when a
failed VLR becomes responsive again.
Exec Mode
[ no ] sgs
vlr-recover sgs-service sgs_svc_name duration minutes backoff-timer seconds [ -noconfirm ]
Modified MME Configuration
Commands
This section
identifies MME commands modified in release 14.0.
attach restrict
This command now enables
the MME to reject EPS Attaches when the IMSI Attach fails.
The MME can now also
be configured to reject EPS Attaches when CSFB and IMS is not available
or not configured (voice unsupported).
An EMM cause code can
be set for each reject scenario using the emm-cause-code keyword.
Call Control Profile
Configuration Mode
attach restrict access-type
eps imsi-attach-fail [ emm-cause-code value ]
attach restrict access-type
eps voice-unsupported [ emm-cause-code value ]
congestion-control
policy
As part of the Application-specific
Overload Control feature, the MME can now be configured to associate
a congestion-action-profile for each of three separate threshold
levels (critical, major and minor).
Global Configuration
Mode
congestion-control policy { critical
mme-service action-profile action_profile_name | major mme-service
action-profile action_profile_name | minor mme-service
action-profile action_profile_name }
congestion-control
threshold
The MME can now be
configured with three separate threshold levels (critical, major
and minor) for each congestion-control threshold.
The example below shows
the changes to the command for the system-memory-utilization threshold.
Global Configuration
Mode
congestion-control
threshold system-memory-utilization { critical
percent | major percent | minor percent }
csfb
The MME can now be
configured to return a “not-preferred” response
for CSFB services.
Call Control Profile
Configuration Mode
csfb policy not-preferred
gw-selection
The MME can now be
configured with preferences/weights of the P-GW/S-GW
from the NAPTR/SRV resource records for load balancing.
Call Control Profile
Configuration Mode
[ remove ] gw-selection { co-location [ weight [ prefer { sgw | pgw } ] ] | pgw
weight | sgw weight | topology [ weight [ prefer { sgw | pgw } ] ] }
heuristic-paging
The MME can now be
configured to enable intelligent paging by associating a profile-map when
heuristic paging is enabled.
Refer to the Heuristic and Intelligent
Paging chapter in the MME Administration
Guide for more information about this command.
MME Service Configuration
Mode
heuristic-paging [ paging-map paging_map_name ]
local-cause-code-mapping
The MME can now be
configured via the call control policy to return a specific emm-cause-code
to a UE when encountering a congestion condition by using the new congestion keyword
option.
Call Control Profile
Configuration Mode
local-cause-code-mapping { congestion
emm-cause-code { congestion [ esm-cause-code { congestion | insufficient-resources | service-option-temporarily-out-of-order } ] | eps-service-not-allowed-in-this-plmn | network
failure | no-suitable-cell-in-tracking-area | plmn-not-allowed | roaming-not-allowed-in-this-tracking-area | tracking-area-not-allowed } | restricted-zone-code
emm-cause-code emm_cause_code }
mme offload mme-service
This MME load rebalancing
(UE offload) command has been updated to include the time-duration, offload-percentage,
and disable-implicit-detach keyword
options.
The start mme-init-release-timeout seconds paging-init-timeout seconds options
have been removed in this release.
Exec Mode
mme offload mme-service mme_svc_name { time-duration minutes offload-percentage percent [ disable-implicit-detach ] | stop } [ -noconfirm ]
policy inter-rat
This command now includes
an ignore-sgsn-context-id keyword
option which configures the MME to ignore Context-Identifier mismatches
between the HSS and HLR for a given subscriber. If enabled, the
MME uses the Context-ID from the HSS to override the Context-ID
from the HLR. If this option is disabled (default), the MME will
drop the PDN when there is a Context-ID mismatch.
MME Service Configuration
Mode
policy inter-rat { ignore-sgsn-context-id | indirect-forwarding-tunnels
always }
qos prefer-as-cap
This qos command
has been enhanced to specifies the QoS cap value to use using the prefer-as-cap keyword.
Call Control Profile
Configuration Mode
qos prefer-as-cap { both-hlr-and-local | both-hss-and-local { local-when-subscription-not-available | minimum | subscription-exceed-reject } | hlr-subscription | local }
IMPORTANT:
No changes were made
to the syntax of this command. All changes are embedded.
qos prefer-as-cap
(Behavior change)
Previous Behavior:
The MME used hlr-subscription as
the default.
New Behavior: The
MME has no default for this command.
APN Profile Configuration
Mode
qos prefer-as-cap { both-hlr-and-local | both-hss-and-local { local-when-subscription-not-available | minimum | subscription-exceed-reject } | hlr-subscription | local }
IMPORTANT:
No changes were made
to the syntax of this command. All changes are embedded.
rfsp-override
This command now includes
the ability to override of the RAT Frequency Selection Priority (RFSP)
of matching subscribers based on UE usage setting and voice domain
preference.
Call Control Profile
Configuration Mode
[ remove ] rfsp-override
ue-settings { data-centric ue-voice-domain-preference { cs-voice-only | cs-voice-preferred-ims-ps-voice-secondary | ims-ps-voice-only | ims-ps-voice-preferred-cs-voice-secondary } | voice-centric
ue-voice-domain-preference { cs-voice-only | cs-voice-preferred-ims-ps-voice-secondary | ims-ps-voice-only | ims-ps-voice-preferred-cs-voice-secondary } new-val value }
timer
This command has been
updated to include the following new configurable SGs-AP timers:
ts10 | ts12-1 | ts12-2 | ts6-1 | ts8 | ts9.
MME SGs Service Configuration
Mode
timer { ts10 value | ts12-1 value | ts12-2 value | ts6-1 value | ts8 value | ts9 value }
timezone
This command has been
updated to include a new daylight-savings-time-increment keyword.
This keyword specifies the number of hours the timezone should be
offset due to daylight savings time. This allows the MME to serve
areas that have daylight savings time different than that of the
MME.
LTE TAI Management
Database Configuration Mode
and
LTE TAI Management
Object Configuration Mode
timezone { + | - } hours value [ minutes { 0 | 15 | 30 | 45 } | daylight-savings-time-increment { 0 | 1 | 2 } ]
vlr
This command has been
enhanced to allow each individual VLR to be defined with up to 10 separate
associations to a single MSS pool. Refer to the SGs Architecture Enhancements section
in this chapter for more information about these changes.
MME SGs Service Configuation
Mode
vlr vlr_name { ipv4-address ipv4_address [ ipv4-address ipv4_address ] | ipv6-address ipv6_address [ ipv6-address ipv6_address ] } port port_number
Deprecated MME Configuration
Commands
This section
identifies deprecated MME commands that are no longer supported
in release 14.0.
mme offload mme-service
The start mme-init-release-timeout seconds paging-init-timeout seconds options
have been removed in this release.
Exec Mode
mme offload mme-service mme_svc_name { time-duration minutes offload-percentage percent [ disable-implicit-detach ] | stop } [ -noconfirm ]
MME Performance Management
Changes as of June 29, 2012
This section
provides information on MME performance management changes in release 14.0.
IMPORTANT:
For more information
regarding bulk statistics in this section, refer to the Statistics and Counters
Reference for this release.
For more information
regarding commands in this section, refer to the Command Line Interface Reference for
this release.
New MME Bulk Statistics
This section
identifies new MME bulk statistics available in release 14.0.
MME Schema
- ecmevent-nw-srvcreq-attempt
- ecmevent-nw-srvcreq-success
- ecmevent-nw-srvcreq-failure
- esmevent-pdncon-ipv4-attempt
- esmevent-pdncon-ipv4-success
- esmevent-pdncon-ipv4-failure
- esmevent-pdncon-ipv6-attempt
- esmevent-pdncon-ipv6-success
- esmevent-pdncon-ipv6-failure
- emm-msgtx-eps-non-eps-not-allowed
- emm-msgtx-no-eps-svc-plmn
- emm-msgtx-tau-no-eps-svc-plmn
- esm-msgtx-brralloc-rej-auth-failed
- esm-msgtx-brralloc-rej-svc-not-supported
- esm-msgtx-brralloc-rej-svc-not-subscribed
- esm-msgtx-brrmod-rej-auth-failed
- esm-msgtx-brrmod-rej-svc-not-supported
- esm-msgtx-brrmod-rej-svc-not-subscribed
- esm-msgtx-pdncon-rej-auth-failed
- esm-msgtx-pdncon-rej-svc-not-supported
- esm-msgtx-pdncon-rej-svc-not-subscribed
- isr-deactivation-s3-pathfail
- isr-deactivation-sgsn-localdetach
- isr-deactivation-sgw-reloc
- isr-deactivation-cn-nodereloc
- isr-deactivation-impdetach
- isr-deactivation-otherdetach
- isr-deactivation-otherreason
eGTP-C Schema
The following eGTP-C
Schema bulk statistics have been introduced for the Idle-mode Signaling
Reduction feature:
- mobility-sent-cspagingind
- mobility-recv-cspagingind
- mobility-sent-alertmmenotf
- mobility-sent-retransalertmmenotf
- mobility-recv-alertmmenotf
- mobility-recv-retransalertmmenotf
- mobility-sent-alertmmeack
- mobility-sent-retransalertmmeack
- mobility-recv-alertmmeack
- mobility-recv-retransalertmmeack
- mobility-sent-alertmmeackaccept
- mobility-sent-alertmmeackdenied
- mobility-recv-alertmmeackaccept
- mobility-recv-alertmmeackdenied
- mobility-sent-ueactivitynotf
- mobility-sent-ueactivitynotf
- mobility-sent-retransueactivitynotf
- mobility-recv-ueactivitynotf
- mobility-recv-retransueactivitynotf
- mobility-sent-ueactivityack
- mobility-sent-retransueactivityack
- mobility-recv-ueactivityack
- mobility-recv-retransueactivityack
- mobility-sent-ueactivityackaccept
- mobility-sent-ueactivityackdenied
- mobility-recv-ueactivityackaccept
- mobility-recv-ueactivityackdenied
- mobility-sent-detachnotf
- mobility-sent-retransdetachnotf
- mobility-recv-detachnotf
- mobility-recv-retransdetachnotf
- mobility-sent-detachack
- mobility-recv-detachack
- mobility-sent-detachackaccept
- mobility-sent-detachackdenied
- mobility-recv-detachackaccept
- mobility-recv-detachackdenied
The following eGTP-C
Schema bulk statistics have been introduced for the Single Radio Voice
Call Continuity (SRVCC) feature:
- srvcc-sent-pstocsreq
- srvcc-sent-retranspstocsreq
- srvcc-recv-pstocsreq
- srvcc-recv-pstocsrspaccept
- srvcc-recv-pstocsrspdenied
- srvcc-recv-pstocscmpnotf
- srvcc-recv-retranspstocscmpnotf
- srvcc-sent-pstocscmpack
- srvcc-sent-retranspstocscmpack
- srvcc-sent-pstocscmpackaccept
- srvcc-sent-pstocscmpackdenied
- srvcc-sent-pstocscancelnotf
- srvcc-sent-retranspstocscancelnotf
- srvcc-recv-pstocscancelack
- srvcc-recv-pstocscanelackaccept
- srvcc-recv-pstocscancelackdenied
HSS Schema
This new Home Subscriber
Server (HSS) schema has been introduced to provide operational statistics
that can be used for monitoring and troubleshooting of the S6a and
S13 interfaces.
SGS-VLR Schema
This new SGs schema
has been introduced to provide operational statistics that can be
used for monitoring and troubleshooting of the SGs connections on
a per-VLR basis.
Modified MME Bulk
Statistics
This section
identifies MME bulk statistics modified in release 14.0.
MME Schema
- Old: ecmevent-srvcreq-attempt New:
ecmevent-ue-srvcreq-attempt
- Old: ecmevent-srvcreq-success New:
ecmevent-ue-srvcreq-success
- Old: ecmevent-srvcreq-failure New:
ecmevent-ue-srvcreq-failure
Deprecated MME Bulk
Statistics
This section
identifies deprecated MME bulk statistics that are no longer supported
in release 14.0.
MME Schema
- emm-msgrx-attach-retx
- emm-msgrx-tau-retx
New MME Performance
Commands
This section
identifies new MME performance commands available in release 14.0.
show lte-policy
paging-map
The following commands
show information about the paging maps used for the Heuristic and
Intelligent Paging feature.
Exec Mode
show lte-policy paging-map summary
show lte-policy paging-map
name <name>
show lte-policy
paging-profile
The following commands
show information about the paging profiles used for the Heuristic and
Intelligent Paging feature.
Exec Mode
show lte-policy paging-profile summary
show lte-policy paging-profile
name <name>
Modified MME Performance
Commands
This section
identifies MME performance commands modified in release 14.0.
clear mme-service
statistics
This command includes
a new offload keyword
to clear load rebalancing (UE offload) statistics.
Exec Mode
clear mme-service statistics [ mme-service mme_svc_name [ offload ] | offload | peer-id peer_identifier [ offload ]
show call-control-profile
full name
The following fields
have been added to the output of this command:
- Idle-mode-Signaling-Reduction
(ISR) for UMTS
- Idle-mode-Signaling-Reduction
(ISR) for GPRS
- Location Reporting for
UMTS
- Location Reporting for
GPRS
-
EPS Attach Restrict
- Voice
Unsupported
- IMSI
Attach Fail
-
CFSB Restrictions
- SMS
Only
- Not
Allowed
- Not
Preferred
- GPRS PDP Type IPV4V6
Override
- UMTS PDP Type IPV4V6
Override
- EPS PDN Type IPV4V6
Override
- RFSP
Exec Mode
show call-control-profile
full name name
show congestion-control
configuration
This command now displays
congestion-control configuration information for each of the MME
threshold levels – critical, major and minor.
Exec Mode
show congestion-control configuration
show congestion-control
statistics
The system can displays
congestion-control statistics for the MME based on the individual threshold
level (critical, major or minor) or all threshold levels.
Exec Mode
show congestion-control
statistics mme { critical | full | major | minor } [ | { grep grep_options | more } ]
show hss-peer-service
service all
The following fields
have been added to the output of this command to show the configuration
of the
diameter
suppress command.
Exec Mode
show hss-peer-service
service all
show lte-policy
tai-mgmt-db
The following fields
have been added or updated in the output of this command:
- Time Zone (now shows
the value for daylight-savings-time-increment such
as “DST 1”)
- Short Network Name
- Long Network Name
Exec Mode
show lte-policy tai-mgmt-db name
show mme-service
all
Exec Mode
show mme-service all
The following fields
have been added to the output of this command:
- CSG Change Notification
- Heuristic Paging
- Heuristic Paging Map
- Inter-RAT Mapping RNCID
to eNBID
- Condition Restricted
zone code
- Condition Congestion
- Condition Newcall
policy restrict
show mme-service
db record imsi
The following tables
have been added to the output of this command:
- UE Tracking Information:
Last Reported 5 eNBs (most recent first)
- UE Tracking Information:
Last Reported 7 ECGIs (most recent first)
Exec Mode
show mme-service db
record imsi imsi
show mme-service
enodeb-association
This command includes
a new enodeb-name keyword
to display information for only the specified eNodeB.
Exec Mode
show mme-service enodeb-association
enodeb-name enodeb_name
show mme-service
name
This command includes
a new offload statistics keyword
to display configuration information for the MME load rebalancing
feature (UE offload), as well as current statistics about any active
offloading processes.
Exec Mode
show mme-service { all | name svc_name [ offload
statistics ] } [ | { grep grep_options | more } ]
show mme-service
session counters
The following two groups
have been added to the output of this command and replace the existing
group
Service Request
Events:
-
UE Requested Service
Request Events
-
NW Initiated Service
Request Events
Exec Mode
show mme-service session counters
show mme-service
statistics
The following two groups
have been added to the output of this command and replace the existing
group
Service Request
Events:
-
UE Requested Service
Request Events
-
NW Initiated Service
Request Events
The following fields
have been added to the output of this command:
- PDN Connections with
PDN-type Override to IPv4
- PDN Connections with
PDN-type Override to IPv6
- EPS PDN Type IPV4V6
Override
-
Total EMM Control Messages
-
-
EPS and non EPS Not
Allowed
-
EPS Not allowed in
this PLMN
-
Total ESM Control Messages
-
-
ISR deactivation Statistics
-
- S3 path failure
- SGSN local detach
- SGW relocation
- CN Node relocation
- Implicit detach
- Other detach procedures
- Other reasons
The Success at Last eNBs field
output has been replaced in this release with the Success at Last n eNBs field.
Exec Mode
show mme-service statistics
show mme-service
session full
The following fields
have been added to the output of this command:
-
Idle Mode Information
Data
-
-
CSG Cell Change Notification
-
CSG Subscribed Hybrid
Cell Change Notification
-
CSG Unsubscribed Hybrid
Cell Change Notification
-
CSG Information
-
-
CSG ID at Last Connection
-
-
-
-
Exec Mode
show mme-service session full
show sgs-service
all
The following fields
have been added to the output of this command:
- Timer Ts8
- Timer Ts9
- Timer Ts10
- Timer Ts12-1
- Timer Ts12-2
Exec Mode
show sgs-service all
show sgs-service
vlr-status full
Omitted Content: The
following fields were added to the output of this command in the
June 29, 2012 release, but were omitted from this document until
now:
- VLR Failure Detach
- VLR Recover Detach
Exec Mode
show sgs-service vlr-status
full
show session subsystem
facility mmedemux
The following fields
have been added to the output of this command:
- Total number of packets
dropped
- Total number of octets
dropped
Exec Mode
show session subsystem
facility mmedemux
show subscribers
A new sgw-address keyword
displays information about the subscribers connected to the specified
S-GW.
Exec Mode
show subscribers sgw-address ip_address
Deprecated MME Performance
Commands
This section
identifies deprecated MME performance commands that are no longer
supported in release 14.0.
show mme-service
all
The following fields
have been removed from the output of this command as a result of
the enhancements to the MME load rebalancing feature:
- MME Offloading
- MME Init Release Timeout
- MME Paging Init Timeout
Exec Mode
show mme-service all
show mme-service
statistics
The Service Request Events group
of counters (attempts/successes/failures) have
been deprecated from the output of this command and replaced by
the UE Requested Service
Request Events and NW
Initiated Service Request Events groups.
The following fields
have been removed from the output of this command:
- TAU Request: Retransmissions – The
total number of retransmitted EMM TAU Request messages received
for a specific ECM event associated with all MME services on the
system.
- Attach Request: Retransmissions – The
total number of retransmitted EMM Attach Request messages received
for a specific ECM event associated with all MME services on the
system.
Exec Mode
show mme-service statistics
MME Security Management
Changes as of June 29, 2012
This section
provides information on MME security management changes in release 14.0.