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Title:
送信権獲得方法、通信中継装置、および無線端末
Document Type and Number:
Japanese Patent JP5286854
Kind Code:
B2
Abstract:

To provide a transmission right acquisition method which reduces a deterioration of a communication quality and enables more simultaneous communications.

A controller 60 sets a value of CW to CW_MIN. The controller 60 initializes a value of a reset counter. The controller 60 confirms whether or not the value of the reset counter has become "0". When is it not "0", a back-off time determining portion 50 selects a back-off time from among a section of [(1/2)*CW, CW] at random. According to the selected back-off time, a timer 54 counts a standby time. A radio transmitting/receiving portion 42 starts a transmission of a voice packet. The radio transmitting/receiving portion 42 confirms the presence/absence of a collision of the voice packet transmission. When the collision of the voice packet transmission is present, the radio transmitting/receiving portion 42 stops the transmission of the voice packet. A competitive window setting portion 52 updates a value of CW. A smaller one of a double value of the present CW value and CW_MAX is selected as an updated value.

COPYRIGHT: (C)2010,JPO&INPIT


Inventors:
Kako Koji
Application Number:
JP2008067475A
Publication Date:
September 11, 2013
Filing Date:
March 17, 2008
Export Citation:
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Assignee:
富士通株式会社
International Classes:
H04W74/08; H04L29/08; H04W84/12
Domestic Patent References:
JP10173663A
JP2005072861A
Foreign References:
WO2007091738A1
Attorney, Agent or Firm:
Junichi Yokoyama



 
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