Radio Resource Management Functions; Mobile Equipment Identity Check; Multiple Pdn Support; System Management Features - Cisco ASR 5000 Series Administration Manual

MME in LTE/SAE Wireless Data Services

Radio Resource Management Functions

Benefits
Radio resource management functions are concerned with the allocation and maintenance of radio communication
paths, and are performed by the radio access network.
Description
To support radio resource management in E-UTRAN the MME provides the RAT/Frequency Selection Priority (RFSP)
parameter to an eNodeB across S1. The RFSP is a „per UE‟ parameter that is used by the E-UTRAN to derive UE
specific cell reselection priorities to control idle mode camping. The RFSP can also be used by the E-UTRAN to decide
on redirecting active mode UEs to different frequency layers or RATs.
The MME receives the RFSP from the HSS during the attach procedure. For non-roaming subscribers the MME
transparently forwards the RFSP to the eNodeB across S1. For roaming subscribers the MME may alternatively send an
RFSP value to the eNodeB across S1 that is based on the visited network policy, e.g. an RFSP pre-configured per
Home-PLMN, or a single RFSP values to be used for all roamers independent of the Home-PLMN.

Mobile Equipment Identity Check

The Mobile Equipment Identity Check Procedure permits the operator(s) of the MME and/or the HSS and/or the PDN-
GW to check the Mobile Equipment's identity with EIR.
The ME Identity is checked by the MME passing it to an Equipment Identity Register (EIR) and then the MME
analyzes the response from the EIR in order to determine its subsequent actions; like rejecting/attaching a UE.

Multiple PDN Support

It provides multiple PDN connectivity support for UE initiated service request.
The MME supports an UE-initiated connectivity establishment to separate PDN GWs or single PDN GW in order to
allow parallel access to multiple PDNs. Up to 11 PDNs are supported per subscriber.

System Management Features

This section describes following features:
Management System Overview
Bulk Statistics Support
Threshold Crossing Alerts (TCA) Support
NAS Signalling Security
OL-22987-01
Cisco ASR 5000 Series Mobility Management Entity Administration Guide ▄
Features and Functionality - Base Software ▀
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