An Advanced CSMA/CA System for Wide Area Broadband Wireless Access

被引：0

作者：

Sano, Kaoru ^{[1
]}

Kobayashi, Hiroshi ^{[1
]}

Moriya, Osamu ^{[2
]}

机构：

[1] Tokyo Denki Univ, Sch Informat Environm, Chiba, Japan

[2] Toshiba Co Ltd, Social Infrastructure Syst Co, Kawasaki, Kanagawa, Japan

来源：

2011 IEEE INTERNATIONAL CONFERENCE ON COMMUNICATIONS (ICC) | 2011年

关键词：

D O I：

暂无

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

An advanced CSMA/CA (carrier sense multiple access with collision avoidance) system incorporating total precedence transmission of all CA and MAC frames (known as a full-flying synchronous CSMA/v-MCA system in Japan, where v-MCA means a variable multiple CA) was developed to minimize the time wasted for upstream channels. In this system, the CA procedures and the controls of the MAC frame transmission run independently of each other by adopting out-of-band signaling (OBS) in order to achieve flexible access control. However, in highly offered traffic, MAC frames that have completed the CA procedure queue to be transmitted, causing latency to increase rapidly. To solve this problem, the CA and MAC channels are properly distributed, and flow control is added to the CA procedure. In this study, the performance of this system was evaluated and confirmed using a theoretical calculation and a computer simulation. Maximum throughput of approximately 0.9 was observed regardless of network length (up to tens of kilometers) and physical transmission speed, maintaining the low latency that is characteristic of contention systems.

引用

页数：6