认知无线多跳网中结合QoS查找的跨层多信道MAC协议

doi:10.3969/j.issn.1000-436x.2013.04.002

摘要/Abstract

摘要：

针对认知无线多跳网中频谱资源具有较大时变性及差异性的问题，设计了一种结合QoS查找的跨层多信道MAC协议。该协议将按需QoS查找与动态频谱分配跨层相结合，仅让参与传输的节点执行频谱分配并按QoS要求获取频谱资源。此外，协议使用频分双工收发机实现了对公共控制信道的不间断监听，并设计了一套支持不同数量收发机节点间混合通信的接入算法。大量仿真结果表明，该协议能有效保证对端到端传输的QoS要求的满足，并显著提高端到端吞吐量及时延。

关键词: 认知无线电, 无线多跳网, MAC协议, QoS保证

Abstract:

In cognitive wireless multi-hop networks,the spectrum resources are highly variable and diverse.A cross-layer multi-channel MAC protocol combined with QoS search was proposed.The protocol combines the on-demand QoS search with dynamic spectrum allocation via cross-layer method,which only permits the transmission nodes to participate in the spectrum allocation and can guarantee the allocation results meet the QoS requirement.Besides,frequency division duplex transceivers are introduced to continuously listen to the common control channel,and an access algorithm is carefully designed to realize hybrid communication between nodes with erent number of transceivers.Extensive simulations show that our protocol can efficiently guarantees the QoS requirement for end-to-end transmission and significantly improves end-to-end throughput and delay.

Key words: cognitive radio, wireless multi-hop networks, MAC protocol, QoS guarantee

孙杰,郭伟. 认知无线多跳网中结合QoS查找的跨层多信道MAC协议[J]. 通信学报, 2013, 34(4): 10-18.

Jie SUN,Wei GUO. Cross-layer multi-channel MAC protocol combined with QoS search for cognitive wireless multi-hop networks[J]. Journal on Communications, 2013, 34(4): 10-18.

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参数	值
PU平均活跃时间（ON状态）	1s
PU平均非活跃时间（OFF状态）	5s
PU检测时间（PSP）	1s
SU自主时间（SAP）	1s
数据负载大小	1 000byte
公共控制信道最大传输速率	1Mbit/s
数据信道最大传输速率	1Mbit/s
DIFS	50μs
SIFS	10μs