Title:
サービス陰影地域における同期化のためのPTTサービスシステム及び方法
Document Type and Number:
Japanese Patent JP4653585
Kind Code:
B2
Abstract:
The present invention relates to synchronizing a terminal and a server in a shadow area of service in a push-to-talk (PTT) service system. An alive report packet is periodically transmitted to a server by a terminal having no permission to send a talk burst. A talk burst idle packet is periodically transmitted to each session-established terminal by the server in an idle state. Sessions are ended between each terminal and server if either the alive report packet or the talk burst idle packet are not received for a certain time. Accordingly, synchronization between the server and the terminal is periodically certified, unnecessary traffic generated due to inconsistent synchronization is decreased, and quality of service is enhanced.
Inventors:
Lycee-hee
Kwon Oh
Kwon Oh
Application Number:
JP2005217994A
Publication Date:
March 16, 2011
Filing Date:
July 27, 2005
Export Citation:
Assignee:
LG ELECTRONICS INC.
International Classes:
H04M3/00; H04N7/173; C07C67/52; C07C67/54; C07C69/82; G02B26/10; G03B11/00; G03B17/02; G06F1/16; G06F11/10; G06F15/00; G06K17/00; G06K19/00; G06T9/00; G09C1/00; G09G3/02; G10L19/00; G11B20/10; G11B20/14; G11B20/18; H03L7/091; H03M13/03; H03M13/13; H03M13/23; H03M13/29; H04B7/005; H04B7/24; H04B7/26; H04B14/00; H04B17/00; H04H60/72; H04J13/16; H04L7/00; H04L9/00; H04L9/08; H04L9/10; H04L9/32; H04L12/24; H04L12/26; H04L12/28; H04L12/54; H04L12/70; H04L25/03; H04L25/49; H04L25/497; H04L27/10; H04L27/156; H04L27/18; H04L29/06; H04L29/12; H04M1/66; H04M1/72415; H04M3/22; H04N5/225; H04N5/44; H04N5/46; H04N5/64; H04N5/74; H04N5/76; H04N5/765; H04N5/907; H04N5/92; H04N7/01; H04N7/08; H04N7/16; H04N7/26; H04N7/36; H04N7/52; H04N9/31; H04N9/64; H04N9/79; H04N21/41; H04N21/414; H04Q3/00; H04W4/06; H04W4/12; H04W4/14; H04W8/02; H04W8/16; H04W8/20; H04W12/06; H04W12/10; H04W24/00; H04W40/22; H04W56/00; H04W76/02; H04W80/06; H04W84/08; H04W84/12; H04W88/02; G11B20/22; H04L1/00; H04N5/38; H04N5/66; H04N5/775; H04N5/85; H04N9/804; H04N17/00; H04W4/10; H04W8/24; H04W8/26; H04W72/04; H04W76/06
Domestic Patent References:
| JP2000513526A |
Foreign References:
| GB2151883B | ||||
| US20030154249 | ||||
| WO2004046880A1 | ||||
| GB2151833B |
Other References:
Push-to-Talk over Cellular(PoC) User Plane;Transport Protocols:PoC Release 2.0;,Comneon,Ericsson,Motorola,Nokia,Siemens,2004年 6月 7日,[平成20年9月29日検索],URL,http://www.motorola.com/mot/doc/1/1572_MotDoc.pdf
尾上 裕子 Yuko Onoe,マルチメディアセッション制御プロトコルにおけるモビリティ拡張機能について Mobility Extensions for a Multimedia Session Management Protocol,情報処理学会研究報告 Vol.2001 No.83 IPSJ SIG Notes,日本,社団法人情報処理学会 Information Processing Society of Japan,2001年 9月 7日,第2001巻
宮崎 敏明 Toshiaki Miyazaki,IP unicast addressを用いたマルチキャスト方式の提案 A Stream-data Multicast Protocol Using IP Unicast Address,電子情報通信学会技術研究報告 Vol.101 No.62 IEICE Technical Report,日本,社団法人電子情報通信学会 The Institute of Electronics,Information and Communication Engineers,2001年 5月11日,第101巻
尾上 裕子 Yuko Onoe,マルチメディアセッション制御プロトコルにおけるモビリティ拡張機能について Mobility Extensions for a Multimedia Session Management Protocol,情報処理学会研究報告 Vol.2001 No.83 IPSJ SIG Notes,日本,社団法人情報処理学会 Information Processing Society of Japan,2001年 9月 7日,第2001巻
宮崎 敏明 Toshiaki Miyazaki,IP unicast addressを用いたマルチキャスト方式の提案 A Stream-data Multicast Protocol Using IP Unicast Address,電子情報通信学会技術研究報告 Vol.101 No.62 IEICE Technical Report,日本,社団法人電子情報通信学会 The Institute of Electronics,Information and Communication Engineers,2001年 5月11日,第101巻
Attorney, Agent or Firm:
Hidesaku Yamamoto
Takaaki Yasumura
Natsuki Morishita
Takaaki Yasumura
Natsuki Morishita