本文描述在Cisco聚集的服务路由器遇到的问题(ASR) 5x00系列该作为服务通用分组无线业务(GPRS)支持节点(SGSN),在用户从一个公有土地移动网络(PLMN)后移动向在同样SGSN内的另一PLMN,或者在两SGSNs之间。
预料之中的行为是SGSN应该执行路由的区域更新(RAU)拒绝,并且用户设备(UE)在新的PLMN应该执行新鲜的附上。然而,这例如不是实际情形。提供对此问题的一应急方案。
这是呼叫流,当UE从其家庭PLMN移动向一外国PLMN时:
sgsn-global
imsi-range mcc xxx mnc yyy operator-policy
<operator_policy_name>
operator-policy name <operator_policy_name>
associate call-control-profile
<call_control_profile_name>
#exit
call-control-profile < call_control_profile_name>
rau-inter-plmn restrict access-type gprs all
rau-inter-plmn access-type gprs all failure-code 14
rau-inter-plmn restrict access-type umts all
rau-inter-plmn access-type umts all failure-code 14
此配置启用或禁用发生区别PLMNs之间所有RAUs的限制。理论上来讲,应该限制它,以便移动站点(MS)尝试在新的PLMN的新鲜的附上。
一旦相互RAU拒绝, MS根据定义的故障代码正常运行(您在verbose命令的设置的输出中能看到此)。
在这种情况下,在信息包数据协议(PDP)后拒绝, UE不尝试新鲜的附上:
Wednesday June 17 2015
INBOUND>>>>> From sessmgr:1 gtapp_tun_fsm.c:4489 (Callid 00135958) 05:05:22:168
Eventid:116003(3)
GTPC Rx PDU, from <>:2123 to <>:19001 (14)
TEID: 0x81F0A001, Message type: GTP_DELETE_PDP_CONTEXT_RES_MSG (0x15)
Sequence Number:: 0x4E43 (20035)
GTP HEADER FOLLOWS:
Version number: 1
Protocol type: 1 (GTP C/U)
Extended header flag: Not present
Sequence number flag: Present
NPDU number flag: Not present
Message Type: 0x15 (GTP_DELETE_PDP_CONTEXT_RES_MSG)
Message Length: 0x0006 (6)
Tunnel ID: 0x81F0A001
Sequence Number: 0x4E43 (20035)
GTP HEADER ENDS.
INFORMATION ELEMENTS FOLLOW:
Cause: 0x80 (GTP_REQUEST_ACCEPTED)
INFORMATION ELEMENTS END.
PDU HEX DUMP FOLLOWS:
0x0000 3215 0006 81f0 a001 4e43 0000 0180 2.......NC....
Wednesday June 17 2015
INBOUND>>>>> From sessmgr:1 gbmgr_bssgp.c:60 (Callid 00135958) 05:05:22:195
Eventid:115053(13)
===>BSSGP Message (20 Bytes)
nsei-11311 bvci-10439
Message: UL-UNITDATA
Incorrect length=19
Decode Error
0x0000 0198 53da 0114 0020 0888 0425 4014 0121 ..S........%@..!
0x0010 3c67 0e80 <g..
Wednesday June 17 2015
INBOUND>>>>> From sessmgr:1 gbmgr_bssgp.c:60 (Callid 00135958) 05:05:22:195
Eventid:115053(13)
===>BSSGP Message (20 Bytes)
nsei-11311 bvci-10439
Message: UL-UNITDATA
Incorrect length=19
Decode Error
0x0000 0198 53da 0114 0020 0888 0425 4014 0121 ..S........%@..!
0x0010 3c67 0e80 <g..
Wednesday June 17 2015
***CONTROL*** From sessmgr:1 sessmgr_func.c:7482 (Callid 00135958) 05:05:22:259
Eventid:10285
CALL STATS: <>, msid <>, Call-Duration(sec): 541
input pkts: 1986 output pkts: 2039
input bytes: 319924 output bytes: 1126648
input bytes dropped: 0 output bytes dropped: 4266
input pkts dropped: 0 output pkts dropped: 8
Disconnect Reason: sgsn-roaming-not-allowed
***
*** Call Finished - Waiting to trace next matching call
***
Wednesday June 17 2015
<<<<OUTBOUND From aaaproxy:1 proxy_handler.c:1002 (Callid 00135958) 05:06:08:843
Eventid:66001(7)
CDR Tx from <>:49999 to <>:3386 (252) PDU-dict=custom33
Message Type: GTPP_DATA_RECORD_TRANSFER_REQUEST_MSG (0xf0)
CDR ELEMENTS FOLLOW
recordType SGSNPDPRECORD
对于故障代码14, MS进行这些操作:
因此,与使用故障代码14, MS从未尝试新鲜的附上,并且UE不能浏览在新的PLMN,直到设备重新启动。
为了应急方案此问题,您能更改失败代码14到9或10。
对于故障代码9 (MS标识不可能通过网络派生) MS进行这些操作:
对于故障代码10 (隐含地被分开), MS进行这些操作:
当使用时任一故障代码9或10,在一个移动向新的PLMN和,在PDP删除后后, MS尝试新鲜的附上并且能浏览:
Wednesday June 17 2015
INBOUND>>>>> From sessmgr:16 gtapp_tun_fsm.c:4489 (Callid 048dbde2) 19:03:02:682
Eventid:116003(3)
GTPC Rx PDU, from <>.55:2123 to<>:19016 (14)
TEID: 0x83108010, Message type: GTP_DELETE_PDP_CONTEXT_RES_MSG (0x15)
Sequence Number:: 0x2E96 (11926)
GTP HEADER FOLLOWS:
Version number: 1
Protocol type: 1 (GTP C/U)
Extended header flag: Not present
Sequence number flag: Present
NPDU number flag: Not present
Message Type: 0x15 (GTP_DELETE_PDP_CONTEXT_RES_MSG)
Message Length: 0x0006 (6)
Tunnel ID: 0x83108010
Sequence Number: 0x2E96 (11926)
GTP HEADER ENDS.
INFORMATION ELEMENTS FOLLOW:
Cause: 0x80 (GTP_REQUEST_ACCEPTED)
INFORMATION ELEMENTS END.
PDU HEX DUMP FOLLOWS:
0x0000 3215 0006 8310 8010 2e96 0000 0180 2.............
Wednesday June 17 2015
***CONTROL*** From sessmgr:16 sessmgr_func.c:7482 (Callid 048dbde2) 19:03:02:745
Eventid:10285
CALL STATS: <>, msid <>, Call-Duration(sec): 899
input pkts: 6490 output pkts: 6021
input bytes: 844122 output bytes: 3710188
input bytes dropped: 0 output bytes dropped: 8361
input pkts dropped: 0 output pkts dropped: 31
Disconnect Reason: sgsn-roaming-not-allowed
Wednesday June 17 2015
INBOUND>>>>> From sessmgr:16 gbmgr_bssgp.c:60 (Callid 77359e2d) 19:03:02:813
Eventid:115053(13)
===>BSSGP Message (79 Bytes)
nsei-1001 bvci-10243
Message: UL-UNITDATA
TLLI(Current)
TLLI Value: 0x953ce010 (Foreign TLLI)
QOS Profile
Peak Bitrate provided by NW : 5242 (in 0.1 kbps)
Precedence : Radio Priority 1
A-Bit : Radio interface uses RLC/MAC-ARQ functionality
T-Bit : The Sdu Contains Signalling
C/R-Bit : The Sdu does not contain a LLC ACK or SACK Command/response frame type
Peak Bit Rate Granularity : 0.1 kbps increments
Cell Identifier
Length: 8
MCC digit 1 : 4
MCC digit 2 : 0
MCC digit 3 : 5
MNC digit 1 : 0
MNC digit 2 : 3
MNC digit 3 : 1
LAC : 0x17d5
RAC : 0x3d
CI : 10813
Alignment Octets
Length: 0
LLC-PDU
Length: 57
===> Logical Link Control (LLC) (0x39) (57 bytes)
Address Field :
0... .... Protocol Discriminator : LLC
.0.. .... Command / Response : Command (MS to SGSN)
..00 .... Spare : 0
.... 0001 SAPI : GPRS Mobility Management
Control Field :
.... Unconfirmed Information Format (UI)
...0 0... Spare : 0
N(U) : 0 (0x000)
.... ..0. Encryption Mode bit : Non-ciphered information
.... ...1 Protected Mode bit : Protected information
Information Field :
===>GPRS Mobility/Session Management Message (51 Bytes)
Protocol Discriminator : GMM message
0000 .... : Skip Indicator : (0)
.... 1000 : Protocol Discriminator : (8)
Message Type: 0x1 (1)
Message : Attach Request