New combination of contention and allocation MAC protocol

Abstract

Abstract: Queue-length based Time Division Multiple Access（Q-TDMA） is a new Media Access Control（MAC） protocol. Its purpose is to resolve poor throughput for IEEE 802.11 with high competition and TDMA with low loads. TDMA protocol can guarantee that each node has a chance to send in a cycle, while synchronous Carrier Sense Multiple Access with Collision Avoidance（CSMA/CA） mechanism can solve the hidden terminal and exposed terminal problem. Combining with the advantages of TDMA and synchronous CSMA/CA mechanism, Q-TDMA demands that node needs to contend to access channel based on its’ own queue length. According to the simulation results, Q-TDMA improves the network throughput and reduces end to end delay.

Key words: Ad hoc network, Time Division Multiple Access（TDMA）, Media Access Control（MAC）, Queue-length based TDMA（Q-TDMA）

摘要： 针对IEEE 802.11在高竞争下吞吐量低，以及TDMA协议在低负载下吞吐量低的问题，提出了一种新的TDMA MAC协议：Q-TDMA。结合TDMA协议可以保证节点在每个周期内有一个发送机会，而同步CSMA/CA机制可以解决隐藏终端和暴露终端的问题，Q-TDMA协议要求节点根据本身的队列长度来竞争复用时隙。仿真实验结果表明，Q-TDMA提高了网络吞吐量，降低了端到端的延迟。

关键词: Ad hoc网络, 时分多址, 媒介接入控制, Q-TDMA协议

PAN Peng, GUO Dawei, LIU Hang, WANG Peng. New combination of contention and allocation MAC protocol[J]. Computer Engineering and Applications, 2013, 49(7): 76-80.

潘鹏，郭达伟，刘航，王鹏. 一种新的竞争与分配相结合的MAC协议[J]. 计算机工程与应用, 2013, 49(7): 76-80.

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New combination of contention and allocation MAC protocol

一种新的竞争与分配相结合的MAC协议

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