Delay analysis of carrier sense multiple access with collision resolution

Abstract

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 ppersistent 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.

Delay and Reliability Analysis of p-Persistent Carrier Sense Multiple Access for Multi-Event Industrial Wireless Sensor Networks

“…Several research works have proposed MAC protocols for multi-priority sensor networks [2,22,23,25,31] and analyzed the effectiveness of CSMA -persistent scheme in terms of network delay and reliability [27][28][29]. In particular, Bhandari and Wang [2] proposed a priority-based deterministic channel access mechanism to reduce the access delay by assigning different MAC layer attributes and used an emergency indication slot to prioritize critical traffic over normal traffic.…”

“…In [27][28][29], -persistent CSMA models were used to analyze the network delay, but it did not consider different priority requirements.…”

“…In past few years, many QoS based Medium Access Control (MAC) protocols are proposed for Wireless Sensor Networks (WSNs)/IWSNs based on [1,11,[18][19][20][21][22][23][24][25][26][27][28][29]. However, only few targeted priority as a primary focus.…”

“…Contention based protocols are based on Carrier Sense Multiple Access (CSMA) scheme which can be split into synchronous and asynchronous protocols. In asynchronous protocols, CSMA -persistent is used to reduce the chances of collision and improve efficiency [26][27][28][29]. In addition, there are two protocols which support different levels of priority, namely QoS aware energy-efficient (QAEE) [22] and multi-priority based QoS (MPQ) [23].…”

Performance Modeling and Analysis of AF Relaying with Hidden Nodes

“…If the channel is sensed idle, the user will send its signal, otherwise it will wait. This is called carrier sense multiple access (CSMA), which lead to a more efficient system compared to the ALOHA protocol, where no two users transmit at the same time [5], [6]. CSMA has many applications, particularly in public areas, such as university campuses, train stations, and airports where many users try to connect to one access point.…”