Delay Analysis of Carrier Sense Multiple Access with Collision Resolution

作者：Choi Hyun Ho; Lee In Ho; Lee Howon^*

来源：Journal of Communications and Networks, 2015, 17(3): 275-285.

DOI：10.1109/JCN.2015.000050

• Carrier sense multiple access (CSMA)
• collision detection
• collision resolution
• delay analysis

To improve the efficiency of carrier sense multiple access (CSMA)-based medium access control (MAC) protocols, CSMA with collision resolution (CSMA/CR) has been proposed. In the CSMA/CR, a transmitting station can detect a collision by employing additional sensing after the start of a data transmission and then resolve the next collision that might occur by broadcasting a jam signal during a collision detection (CD) period. In this paper, we analyze the delay of a CSMA/CR based on a generic p persistent CSMA model and obtain the minimum achievable delay of the CSMA/CR by finding the optimal length of the CD period according to the number of contending stations. Through this delay analysis, we also investigate the throughput-delay characteristics of the CSMA/CR protocol according to various parameters. Analysis and simulation results show that the CSMA/CR has a considerably lower delay and its throughput-delay characteristic is significantly improved than the conventional CSMA/CA and wireless CSMA/CD protocols.

• 出版日期2015-6