Abstract channel This paper analyzes the performance of IEEE 802.11 MAC protocol under a disaster scenario. The performance is measured in terms of the recovery time and the throughput of the protocol when a network disaster occurs. To make the problem amenable to analysis, some approximations are used, and a new technique to collapse a very large state space is introduced. The analytical results are found to agree with simulations. is busy channel is busy idle slots

Absmct-In two companion papers a method for multiplexing a population of terminals communicating with a central station over a packet-switched radio channel was introduced; this method is known as Carrier Sense Multiple Access (CSMA). CSMA, as with ALOHA multiaccess broadcast channels, has

(CSMA/CA) is probably the most widespread multiple access protocol in use today, mainly due to the tremendous success of the IEEE 802.11 suite of standards. Until now most of the studies done about the protocol have focused on maximizing the performance. However as the bands become more crowded

. An alternate solution is the subject of this paper, namely, nal to sense the presence of other transmissions; this leads to a ground radio packet switching. new method for multiplexing in a packet radio environment: carrier sense multiple access (CSMA). Two protocols are described for CSMA and their throughput

, transmissions may conflict with and destroy each other. A means for controlling this is for the termi-nal to sense the presence of other transmissions; this leads to a new method for multiplexing in a packet radio environment: carrier sense multiple access (CSMA). Two protocols are described for CSMA

Tactical network designers are faced with difficult protocol choices. A common choice available is a Carrier Sense Multiple Access (CSMA) network. For

Abstract — In wireless ad hoc networks with multi-hop routing, a node A may know the contents of a packet being transmitted by a neighbor B because A may have transmitted the packet to B in a previous interval. In networks not employing spreadspectrum multiple access (SSMA), a transmission by B

cess (PRCSMA) has been recently presented in the literature as a novel Medium Access Control (MAC) protocol based on the IEEE 802.11 and modified to cope with the contention among the relays in a Cooperative ARQ (C-ARQ) scheme. We present in this paper a theoretical model to calculate the average

, the lifetime of WSNs, to some extent, is determined by the power consumption of communication between sink and sensing nodes that near the sink. To address this issue, we propose CSMA/SF (Shortest First) protocol to reduce power consumption of sink-node com-munication by minimizing energy cost in carrier sense

Abstract not found