Title:
ゲートウェイ無線通信装置、無線通信システム、及び通信制御方法
Document Type and Number:
Japanese Patent JP5841462
Kind Code:
B2
Abstract:
A period is defined to execute the sequences (processes) of communication data acquisition, measuring communication quality, communication quality data acquisition, and channel change. Processing is controlled to execute each process within a time limit set for each process and execute all processes in one cycle. This avoids that a delayed sequence influences and delays other sequences and can suppress delays. If processing fails to finish a sequence, it will resume the same sequence in the next cycle. For communication stations sharing timeslots, there are provided offset periods differing in length before the start of carrier sense in the timeslots for these stations. Consequently, even under a condition in which packet collision may occur, the collision of packets can be avoided by detecting a packet sent to another station by carrier sense. Moreover, by controlling sending priority of packets in the send queue of the gateway, sending delay can be avoided.
Inventors:
Yasutaka Serizawa
Takashi Yano
宮▲崎▼ 祐行
Kenichi Mizugaki
Takashi Yano
宮▲崎▼ 祐行
Kenichi Mizugaki
Application Number:
JP2012051907A
Publication Date:
January 13, 2016
Filing Date:
March 08, 2012
Export Citation:
Assignee:
株式会社日立製作所
International Classes:
H04W72/08; H04W72/04; H04W88/16
Domestic Patent References:
| JP2011229126A | ||||
| JP2008148254A |
Foreign References:
| US20110026481 |
Attorney, Agent or Firm:
Yusuke Hiraki
Sekiya Mitsuo
Toshiaki Watanabe
Sekiya Mitsuo
Toshiaki Watanabe