# US 10,455,450 B2 · Methods and apparatus for optimizing load re-balancing for dedicated core network in wireless communication system

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- Number: US 10,455,450 B2
- Document ID: US10455450B2
- Status: Granted
- Kind: B2
- Application number: 15/542,372
- Filed: 2016-01-07
- Published: 2018-09-27
- Granted: 2019-10-22
- Earliest claimed: 2015-01-07
- Assignees: LG Electronics Inc.
- Applicants: LG Electronics Inc.
- Inventors: Lair Yannick; Hyunsook Kim
- Web page: https://patentgrep.com/patent/US10455450B2

## CPC

- H04W 28/088: among core entities
- H04W 8/065: {involving selection of the user mobility server}
- H04W 40/34: Modification of an existing route
- H04W 8/02: Processing of mobility data, e.g. registration information at HLR [Home Location Register] or VLR [Visitor Location Register]; Transfer of mobility data, e.g. between HLR, VLR or external networks
- H04W 40/18: based on predicted events
- H04W 84/042: {Public Land Mobile systems, e.g. cellular systems}
- H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72)

## Abstract

A method and apparatus for performing load re-balancing for the dedicated core network in a wireless communication system is provided. An evolved NodeB (eNB) which supports a dedicated core network receives a mobility management entity group identity (MMEGI) of an MME pool, corresponding to the dedicated core network, from a UE which is attached to a first MME of the MME pool. The eNB redirects the UE to a second MME of the MME pool by using the MMEGI of the MME pool.

## Claims

### Claim 1

A method performed by an evolved NodeB (eNB) supporting a dedicated core network in a wireless communication system, the method comprising:
receiving, by the eNB, from a first mobility management entity (MME) an S1 user equipment (UE) context release command message including a cause value, which indicates load re-balancing for the dedicated core network, wherein the first MME is included in a dedicated MME pool;
transmitting, by the eNB, a radio resource control (RRC) connection release message including the cause value to a UE, wherein the RRC connection release message indicates that the eNB supports the dedicated core network functionality;
receiving, by the eNB, from the UE a RRC connection setup complete message including an MME group identity (MMEGI) indicating the dedicated MME pool;
selecting, by the eNB, a second MME among plurality of MMEs included in the dedicated MME pool; and
redirecting, by the eNB, the UE to the second MME, by transmitting a S1 initial UE message to the second MME,
wherein the dedicated MME pool is a specific group of the dedicated core network for a specific subscriber.

### Claim 2 (depends on 1)

The method of claim 1, wherein the MMEGI of the MME dedicated pool is included in a globally unique MME identity (GUMMEI) corresponding to the first MME.

### Claim 3 (depends on 1)

The method of claim 1, wherein the RRC connection release message is transmitted via a system information block (SIB).

### Claim 4

An evolved NodeB (eNB) comprising:
a memory;
a transceiver; and
a processor, coupled to the memory and the transceiver, that:
controls the transceiver to receive from a first mobility management entity (MME) an S1 user equipment (UE) context release command message including a cause value, which indicates load re-balancing for a dedicated core network, wherein the first MME is included in a dedicated MME pool,
controls the transceiver to transmit a radio resource control (RRC) connection release message including the cause value to a UE, wherein the RRC connection release message indicates that the eNB supports the dedicated core network functionality,
controls the transceiver to receive a RRC connection setup complete message including an MME group identity (MMEGI) indicating the dedicated MME pool from the UE,
selects a second MME among plurality of MMEs included in the dedicated MME pool, and
redirects the UE to the second MME, by transmitting a S1 initial UE message to the second MME,
wherein the dedicated MME pool is a specific group of the dedicated core network for a specific subscriber.