# US 9,883,355 B2 · Method and apparatus for transmitting interest indication for group communication in wireless communication system

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- Number: US 9,883,355 B2
- Document ID: US9883355B2
- Status: Granted
- Kind: B2
- Application number: 14/906,447
- Filed: 2014-09-26
- Published: 2016-06-09
- Granted: 2018-01-30
- Earliest claimed: 2013-09-26
- Assignees: LG Electronics Inc.
- Applicants: LG Electronics Inc.
- Inventors: Youngdae Lee; Sunghoon Jung
- Web page: https://patentgrep.com/patent/US9883355B2

## CPC

- H04W 4/08: User group management
- H04L 12/189: {in combination with wireless systems (selective distribution or broadcast in wireless communication networks H04W4/06)}
- H04W 4/06: Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services
- H04W 68/005: {Transmission of information for alerting of incoming communication}
- H04W 72/21: in the uplink direction of a wireless link, i.e. towards the network
- H04W 72/23: in the downlink direction of a wireless link, i.e. towards a terminal
- H04W 72/30: Resource management for broadcast services
- H04W 76/27: Transitions between radio resource control [RRC] states
- H04L 12/1859: {adapted to provide push services, e.g. data channels}
- H04L 12/1895: {for short real-time information, e.g. alarms, notifications, alerts, updates}
- H04W 76/40: for selective distribution or broadcast
- H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72)
- H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M)

## Abstract

A method and apparatus for transmitting an interest indication for group communication in a wireless communication system is provided. A user equipment (UE) receives a paging message indicating a group, establishes a radio resource control (RRC) connection with an establishment cause indicating the group, and transmits an uplink interest indication message which informs a service or the group.

## Claims

### Claim 1

A method for transmitting, by a user equipment (UE), an interest indication for group communication in a wireless communication system, the method comprising:
receiving a paging message, which includes a group communication service enabler (GCSE) identity (ID), indicating a GCSE group;
establishing a radio resource control (RRC) connection with an establishment cause indicating the GCSE group; and
transmitting an uplink interest indication message including the interest indication which informs the GCSE group entitled to participate in the group communication, upon establishing the RRC connection,
wherein the uplink interest indication message is transmitted to one of an eNodeB (eNB), a mobility management entity (MME) or a GCSE server, and
wherein the uplink interest indication message is a multimedia broadcast multicast service (MBMS) interest indication message.

### Claim 2 (depends on 1)

The method of claim 1, wherein the paging message includes a paging cause which indicates group communication or GCSE.

### Claim 3 (depends on 1)

The method of claim 1, wherein the GCSE ID is one of a group ID or an application ID.

### Claim 4 (depends on 1)

The method of claim 1, wherein the group is a GCSE group which includes a set of members participating in a group communication service.

### Claim 5 (depends on 1)

The method of claim 1, wherein the UE belongs to the group.

### Claim 6 (depends on 1)

The method of claim 1, wherein the establishment cause indicating the group is one of group communication or GCSE.

### Claim 7

A user equipment (UE) in a wireless communication system, the UE comprising:
a radio frequency (RF) transceiver configured to transmit or receive a radio signal; and
a processor coupled to the RF transceiver, and configured to:
receive a paging message, which includes a group communication service enabler (GCSE) identity (ID), indicating a GCSE group,
establish a radio resource control (RRC) connection with an establishment cause indicating the GCSE group, and
transmit an uplink interest indication message including the interest indication which informs the GCSE group entitled to participate in a group communication, upon establishing the RRC connection,
wherein the uplink interest indication message is transmitted to one of an eNodeB (eNB), a mobility management entity (MME) or a GCSE server, and
wherein the uplink interest indication message is a multimedia broadcast multicast service (MBMS) interest indication message.

### Claim 8 (depends on 7)

The UE of claim 7, wherein the paging message includes a paging cause which indicates group communication or GCSE.