一种关于分布式网络调度协议的研究

Research of a Distributed Scheduler for Ad Hoc Networks

多址接入控制协议是网络的重要组成部分,特别是在分布式网络中,它直接影响网络的性能。随着技术的发展,如何将物理层和多址接入层有效的结合起来,如何在接入时可以有效的利用资源,这些因素对网络性能上的提升具有重要意义和价值。本文研究了高通公司提出的Flash Lin Q通信系统,并且详细介绍了Flash Lin Q通信系统所采用的分布式调度协议,该协议是一种高效的并且有效利用空间资源的多址接入协议,相比于RTS/CTS机制的CSMA/CA机制的多址接入协议有较大的增益。协议可以在信号覆盖范围之内实现多条链路的并行传输,增加了网络的吞吐量,改善了网络的性能。

MAC （Media Access Control） protocol is an important part of distributed network, which is a key factor that affects the performances of a network directly. With the development of technology, it has great significance and value in the networks that combine the physical layer and media access layer effectively, take good use of resources and bring the ascension of the network performance. The FlashLinQ communication system is studied, which is proposed by Qualcomm Company. The distributed scheduler protocol adopted by FlashLinQ communication system is introduced in detail. The protocol is effective use of space resources and has greater gain compared with the RTS/CTS mechanism of the CSMA/CA protocol. The physical layer of the protocol use OFDMA technology and an analog signal detecting technology to perceived channel information. With the information, a parallel transmission of multiple links can be implemented within the signal coverage, so the throughput of network is increased and the performance is improved.