Cisco Cisco ASR 5700
Mobility Management Entity Overview
▀ Features and Functionality - Base Software
▄ MME Administration Guide, StarOS Release 18
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Session Recovery: all MME sessions established using the S3 interface are capable of being recovered in case of
a session manager task failure.
Unoptimized Non-3GPP Handover Support
The MME provides support for Non-3GPP to EUTRAN and EUTRAN to Non-3GPP un-optimized handovers. These
include the LTE-eHRPD handover scenarios in sections 8.2.1.1 and 8.2.1.2, and 8.2.2 and 8.2.3 of 3GPP TS 23.402-
910.
include the LTE-eHRPD handover scenarios in sections 8.2.1.1 and 8.2.1.2, and 8.2.2 and 8.2.3 of 3GPP TS 23.402-
910.
No configuration is required to enable this functionality on the MME.
Note:
PDN Connectivity request should contain Request Type as HANDOVER.
P-GW is selected only through HSS-provided P-GW address or FQDN (MIP6-Info), with P-GW allocation type
as static always.
In the case of multiple PDN connectivity during handover from non-3gpp access to EUTRAN, the ESM PDN
connectivity message from UE is transported via S1AP Uplink NAS transport. All other such PDN
connectivity requests shall be rejected.
connectivity requests shall be rejected.
Handovers to other access (such as UTRAN, GERAN) are only supported after the S11 modify bearer
procedures with S-GW have been completed for all PDNs.
Performance Indicators:
The following MME schema bulk statistics track the number of outbound and inbound non-3GPP handovers that were
attempted, were successful, and which failed. Note: During an inbound relocation, both the handover statistics and
relevant attach/PDN connectivity statistics will be incremented.
attempted, were successful, and which failed. Note: During an inbound relocation, both the handover statistics and
relevant attach/PDN connectivity statistics will be incremented.
out-non-3GPP-ho-attempted
out-non-3GPP-ho-success
out-non-3GPP-ho-failures
in-non-3GPP-ho-attempted
in-non-3GPP-ho-success
in-non-3GPP-ho-failures
The
show mme-service statistics
command also displays the number of outbound and inbound non-3GPP
handovers that were attempted, were successful, and which failed. Note that these counters increment on a per-PDN
basis.
basis.
The system disconnect reason disc-reason-484 - mme-reloc-to-non-3GPP tracks the total number of session
disconnects resulting from outbound non-3GPP handovers.
disconnects resulting from outbound non-3GPP handovers.
IPv6 Support
This feature allows IPv6 subscribers to connect via the LTE/SAE infrastructure in accordance with the following
standards:
standards:
RFC 2460: Internet Protocol, Version 6 (IPv6) Specification
RFC 2461: Neighbor Discovery for IPv6
RFC 2462: IPv6 Stateless Address Autoconfiguration