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1. (CN1267408) Method of and apparatus for detecting and preventing message collisions in communication system

Office : China
Application Number: 98807187.8 Application Date: 14.05.1998
Publication Number: 1267408 Publication Date: 20.09.2000
Grant Number: 1140067 Grant Date: 25.02.2004
Publication Kind : C
Prior PCT appl.: Application Number:PCTUS9809927 ; Publication Number:9852299 Click to see the data
IPC:
H04N 1/00
H04B 7/005
H ELECTRICITY
04
ELECTRIC COMMUNICATION TECHNIQUE
N
PICTORIAL COMMUNICATION, e.g. TELEVISION
1
Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
[IPC code unknown for H04B 7/05]
CPC:
H04N 1/32619
H04B 7/015
H04L 1/1887
H04N 1/00281
H04N 1/32614
H04N 1/32641
H04N 1/32646
H04N 1/32683
H04N 1/327
H04N 2201/0015
H04W 24/00
H04W 74/0816
H04W 74/0825
Applicants: Qualcomm Inc.
夸尔柯姆股份有限公司
Inventors: Nikolai K. N. Leung
尼古拉·K·N·洛伊恩
Agents: chen liang
上海专利商标事务所
Priority Data: 08857343 16.05.1997 US
Title: (EN) Method of and apparatus for detecting and preventing message collisions in communication system
(ZH) 在通信系统中检测和防止报文冲突的方法和装置
Abstract: front page image
(EN) In a half-duplex communication system in which additional delays in the communication channel (18, 20) may cause a message collision between a message and a response, a collision detector (40a, 40b) is utilized to prevent and detect message collisions. The collision detector determines (204) if a response may be transmitted from the communication device while it is receiving the current message. If no response is expected, the collision detector is placed (214) into a train mode. If a response is possible, the collision detector is placed (206) into the monitor mode. In the monitor mode, the collision detector monitors the communication channel and determines (210) if a message collision has occurred during transmission of the message. A detection of a message collision causes retransmission of the message or possibly a new message at a later time after it has been determined (202) that the communication channel is clear.
(ZH)

在半双工通信系统中,通信信道(18,20)中的附加延迟可能引起报文与响应之间的报文冲突,用一个冲突检测器(40a,40b)来防止和检测这种报文冲突。冲突检测器确定(204)在通信设备接收当前报文的同时是否可以从通信设备传送响应。如果不期望响应,则冲突检测器进入训练模式(214)。如果可能有响应,则冲突检测器进入到监视模式(206)。在监视模式,冲突检测器监视通信信道,并确定(210)在报文传送期间是否发生报文冲突。报文冲突的检测引起在确定了通信信道已复位(202)之后的后面一时刻上重新传送报文,或者可能发送一个新的报文。


Also published as:
KR1020010012637EP0983641EP1478101JP2002502563 AU1998073878WO/1998/052299