Method for public safety communication and apparatus for the same

Patent metadata

Field	Value
Publication number	US-9510161-B2
Application number	US-201414324502-A
Country	US
Kind code	B2
Filing date	Jul 7, 2014
Priority date	Jul 8, 2013
Publication date	Nov 29, 2016
Grant date	Nov 29, 2016

Abstract

Disclosed are methods and apparatuses for public safety communication. A method comprises transmitting a groupcast setup request message to a base station; receiving an uplink grant message including information on groupcast resources in response to the groupcast setup request message from the base station; and transmitting data to be transmitted to receiving terminals belonging to a group to which the transmitting terminal belongs to the base station through the groupcast resources. Therefore, public safety communication can be efficiently performed in a wireless communication system.

First claim

What is claimed is:

1. A public safety communication method performed in a transmitting node supporting groupcast or broadcast, the method comprising:
a frame used in the method includes a plurality of data channels, a plurality of ACK channels corresponding the plurality of data channels, a plurality of L-REQ channels corresponding the plurality of data channels, and a plurality of L-RLY channels corresponding the plurality of data channels,
transmitting a k th L-REQ channel including a groupcast or a broadcast identifier (ID) to support groupcast or broadcast link setup, wherein k is a natural number; and
receiving a null message from a receiving node through a L-RLY channel corresponding the k th L-REQ channel if the groupcast or broadcast link setup is allowed, or a predefined sequence message from the receiving node through the L-RLY channel corresponding the k th L-REQ channel if the groupcast or broadcast link setup is not allowed.

2. The method of claim 1 , further comprising:
performing the groupcast from a next frame if the null message is received from the receiving node, or re-performing the groupcast link setup in the next frame if the predefined sequence message is received from the receiving node.

3. The method of claim 1 , wherein when the groupcast is performed by setting the groupcast link, a predefined signal to protect the groupcast link is transmitted from the receiving node through an ACK channel.

4. A priority call process method comprising:
a frame used in the method includes a plurality of data channels, a plurality of ACK channels corresponding the plurality of data channels, a plurality of L-REQ channels corresponding the plurality of data channels, and a plurality of L-RLY channels corresponding the plurality of data channels,
requesting, by a node having a priority call to be transmitted, priority call link setup using a specified data channel through a L-REQ channel in a n th frame, wherein n is a natural number;
transmitting, by a node having usage right of the specified data channel, information indicating transmission suspension through the specified data channel in a (n+1) th frame; and
transmitting, by a node receiving the information indicating transmission suspension, information indicating that the transmission suspension is recognized through an ACK channel corresponding the specified data channel.

5. A priority call process method comprising:
a frame used in the method includes a plurality of data channels, a plurality of ACK channels corresponding the plurality of data channels, a plurality of L-REQ channels corresponding the plurality of data channels, and a plurality of L-RLY channels corresponding the plurality of data channels,
requesting, by a node having a priority call to be transmitted, priority call link setup using a specified data channel through a L-REQ channel in a n th frame, wherein n is a nature number;
requesting, by a node receiving the specified data channel, usage suspension of the specified data channel through a ACK channel corresponding the specified data channel in a (n+1) th frame; and
suspending, by a node having a usage right of the specified data channel, usage of the specified data channel from a (n+2) th frame if request of usage suspension of the specified data channel is allowed.

6. A public safety communication method performed in a transmitting node, the method comprising:
a frame used in the method includes a plurality of broadcast channels (BCH), a plurality of BCH occupancy indication (bcoi) channels and a plurality of echo channels which are used for confirming occupancy status of the BCH,
transmitting a predefined orthogonal code through a bcoi channel in a n th frame to notifying that a BCH in a (n+1) th frame is occupied by the transmitting node, wherein n is a nature number;
receiving, by the transmitting node, information including at least one orthogonal code through an echo channel in the n th frame, wherein the information including at least one orthogonal code, transmitted through a bcoi channel in n th frame, is obtained by a receiving node; and
transmitting a data through a BCH in the (n+1) th frame if the predefined orthogonal code transmitted from the transmitting node is only included in the information including at least one orthogonal code, or a data through a BCH in the (n+1) th frame if the predefined orthogonal code transmitted from the transmitting node is conformed to a predefined condition when the information including at least one orthogonal code includes a plurality of orthogonal code.

Assignees

• Electronics & Telecommunications Res Inst
• Electronics & Telecoomunications Res Inst

Inventors

• Yeh Choong Il
• Ahn Jae Young
• Noh Tae Gyun
• Ahn Dong Hyun

Classifications

• H04W4/90

  Services for handling of emergency or hazardous situations, e.g. earthquake and tsunami warning systems [ETWS] · CPC title

• H04W4/08 Primary

  User group management · CPC title

• H04W4/06

  Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services · CPC title

• H04W4/70

  Services for machine-to-machine communication [M2M] or machine type communication [MTC] · CPC title

• H04W72/30

  Resource management for broadcast services · CPC title