Method and apparatus for relocating group owner of proximity services group in wireless communication system

• US 10,064,037 B2
• Filed: 08/04/2014
• Issued: 08/28/2018
• Est. Priority Date: 08/04/2013
• Status: Expired due to Fees

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Lee, Youngdae, Jung, Sunghoon
• Primary Examiner(s): Nawaz, Asad M
• Assistant Examiner(s): Chang, Kai
• Application Number:
  US14/909,874
• Publication Number:
  US 20160165414A1
• Time in Patent Office: 1,485 Days
• CPC Class Codes: H04B 17/309 Measuring or estimating channel quality parameters
• CPC Class Codes: H04L 67/1051 Group master selection mechanisms
• CPC Class Codes: H04W 36/06 Reselecting a communication resource in the serving access point
• CPC Class Codes: H04W 36/304 due to measured or perceived resources with higher communication quality
• CPC Class Codes: H04W 4/06 Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services
• CPC Class Codes: H04W 4/08 User group management
• CPC Class Codes: H04W 4/70 Services for machine-to-machine communication [M2M] or machine type communication [MTC]
• CPC Class Codes: H04W 4/80 Services using short range communication, e.g. near-field communication [NFC], radio-frequency identification [RFID] or low energy communication
• CPC Class Codes: H04W 48/16 Discovering, processing access restriction or access information
• CPC Class Codes: H04W 56/0015 one node acting as a reference for the others
• CPC Class Codes: H04W 72/0446 Resources in time domain, e.g. slots or frames
• CPC Class Codes: H04W 76/14 Direct-mode setup
• CPC Class Codes: H04W 76/20 Manipulation of established connections
• CPC Class Codes: H04W 76/23 Manipulation of direct-mode connections
• CPC Class Codes: H04W 76/30 Connection release
• CPC Class Codes: H04W 8/005 Discovery of network devices, e.g. terminals
• CPC Class Codes: H04W 8/186 Processing of subscriber group data
• CPC Class Codes: H04W 84/18 Self-organising networks, e.g. ad-hoc networks or sensor networks
• CPC Class Codes: H04W 84/20 Master-slave selection or change arrangements
• CPC Class Codes: H04W 88/06 adapted for operation in multiple networks or having at least two operational modes, e.g. multi-mode terminals

Abstract

A method and apparatus for relocating a group owner (GO) of a proximity services (ProSe) group in a wireless communication system is provided. A first user equipment (UE), which is the GO of the ProSe group currently, receives at least one of channel quality of a second UE in the ProSe group or priority of the second UE in the ProSe group, from the second UE. The first UE determines the second UE as a new GO of the ProSe group based on the at least one of the channel quality of the second UE in the ProSe group or priority of the second UE in the ProSe group. Alternatively, the second UE may determine itself as the new GO of the ProSe group if the priority of the second UE in the ProSe group is higher than a priority of the first UE in the ProSe group.

Claims

1. A method for relocating, by a first user equipment (UE) which is a group owner of a proximity services (ProSe) group currently, the group owner of the ProSe group in a wireless communication system, the method comprising:

receiving channel quality of a second UE and a ProSe priority of the second UE in the ProSe group, from the second UE;

if the channel quality of the second UE is better than channel quality of the first UE, and if the ProSe priority of the second UE is higher than a ProSe priority of the first UE, determining the second UE as a new group owner of the ProSe group; and

after determining the second UE as the new group owner of the ProSe group, transmitting a group owner relocation command, which includes a group identity (ID) of the ProSe group, to all members of the ProSe group including the second UE determined as the new group owner of the ProSe group,

wherein the ProSe priority of the first UE and the ProSe priority of the second UE are allocated by a network node,

wherein the channel quality of the first UE is channel quality of an evolved-universal mobile telecommunications system (UMTS) terrestrial radio access network (E-UTRAN) cell which serves the first UE,

wherein the channel quality of the second UE is channel quality of an E-UTRAN cell which serves the second UE, and

wherein the group owner relocation command informs the all members of the ProSe group that the group owner of the ProSe group is relocated from the first UE to the second UE.

2. The method of claim 1, wherein the channel quality of the second UE is measured by the second UE.

3. The method of claim 1, wherein the network node includes a ProSe server, a mobility management entity (MME), or an eNodeB (eNB).

4. The method of claim 1, wherein the group owner relocation command is broadcast.

5. The method of claim 1, further comprising:

receiving a group owner relocation request, which includes the group ID of the ProSe group, from the second UE.

6. The method of claim 5, further comprising:

transmitting a group owner relocation response to the second UE.

7. A method for relocating, by a second user equipment (UE) which is not a group owner of a proximity services (ProSe) group currently, the group owner of the ProSe group in a wireless communication system, the method comprising:

receiving a ProSe priority of the second UE in the ProSe group, which is higher than a ProSe priority of a first UE in the ProSe group, from a network;

receiving channel quality of the first UE in the ProSe group, which is the group owner of the ProSe group currently, from the first UE;

if channel quality of the second UE is better than a pre-determined threshold for determining a new group owner of the ProSe group, determining autonomously the second UE as the new group owner of the ProSe group based on the channel quality of the first UE; and

after determining autonomously the second UE as the new group owner of the ProSe group, transmitting a group owner relocation request including a group identity (ID) of the ProSe group, to all group members of the ProSe group and the first UE,

wherein the channel quality of the first UE is channel quality of an evolved-universal mobile telecommunications system (UMTS) terrestrial radio access network (E-UTRAN) cell which serves the first UE, and

wherein the channel quality of the second UE is channel quality of an E-UTRAN cell which serves the second UE.

8. The method of claim 7, wherein the priority of the second UE is received from a network node including a ProSe server, a mobility management entity (MME), or an eNodeB (eNB).

9. A second user equipment (UE) which is not a group owner of a proximity services (ProSe) group currently, the second UE comprising:

a radio frequency (RF) transceiver that transmits or receives a radio signal; and

a processor, coupled to the RF transceiver, and that;

controls the RF transceiver to receive a ProSe priority of the second UE in the ProSe group, which is higher than a ProSe priority of a first UE in the ProSe group, from a network,

controls the RF transceiver to receive channel quality of the first UE in the ProSe group, which is the group owner of the ProSe group currently, from the UE,

if channel quality of the second UE is better than a pre-determined threshold for determining a new group owner of the ProSe group, determines autonomously the second UE as the new group owner of the ProSe group based on the channel quality of the first UE, and UE; and

after determining autonomously the second UE as the new group owner of the ProSe group, controls the RF transceiver to transmit a group owner relocation request including a group identity (ID) of the ProSe group, to all group members of the ProSe group and the first UE,

wherein the channel quality of the first UE is channel quality of an evolved-universal mobile telecommunications system (UMTS) terrestrial radio access network (E-UTRAN) cell which serves the first UE, and

wherein the channel quality of the second UE is channel quality of an E-UTRAN cell which serves the second UE.