Methods and apparatus for optimizing load re-balancing for dedicated core network in wireless communication system

• US 10,455,450 B2
• Filed: 01/07/2016
• Issued: 10/22/2019
• Est. Priority Date: 01/07/2015
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Yannick, Lair, Kim, Hyunsook
• Primary Examiner(s): Rampuria, Sharad
• Application Number:
  US15/542,372
• Publication Number:
  US 20180279174A1
• Time in Patent Office: 1,384 Days
• CPC Class Codes: H04W 28/088 among core entities
• CPC Class Codes: H04W 40/18 based on predicted events
• CPC Class Codes: H04W 40/34 Modification of an existing route
• CPC Class Codes: 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
• CPC Class Codes: H04W 8/065 involving selection of the user mobility server
• CPC Class Codes: H04W 84/042 Public Land Mobile systems, e.g. cellular systems

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

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.

2. 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.

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

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.