A valid license key is required to enable heuristic and intelligent paging. Contact your Cisco Account or Support representative for information on how to obtain a license.
Paging is a shared resource with a finite capacity in the radio access network. When a request for an idle mode access terminal is received by the S-GW, the MME floods the paging notification message to all eNodeBs in the Tracking Area List (TAI). A network has several million customers and hundreds of eNodeBs in the TAI. If each subscriber receives a page during peak network traffic hour, more than a million number of paging messages are generated per second. In order to prevent this scenario, Heuristics or Idle-mode paging is introduced. This optimized paging feature reduces network operations cost through more efficient utilization of paging resources and reduced paging load in the E-UTRAN access network. In heuristics paging the MME keeps track of the eNodeB to which the UE most commonly attaches or was previously connected to and only pages those eNodeBs before paging the TA or TA (Tracking Area) list, thus reducing the signaling otherwise associated with continuous paging.
When heuristics paging is enabled, MME selects the paging profile based on the APN profile, if paging-profile with matching APN profile name is fetched from the APN information corresponding to the EBI received in DDN is configured in the paging-map. If the incoming DDN does not have the EBI information then the APN information is received from the bearers stored in the MME for the UE. If multiple APN information is available then the mapping with the highest precedence is picked. MME warns the user of duplicate APN profile names in a given entry. The same APN profile name cannot be configured with more than one precedence level.
Intelligent Paging further optimizes heuristic paging to allow operators to specify different paging profiles for different streams of traffic (CS or PS traffic types). Each paging profile provides the flexibility to control the pace, volume and type of paging requests sent to eNBs.