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arXiv 1706.07544cs.NI
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下一代IEEE 802.11无线局域网中同时发送和接收操作:一种MAC协议设计方法

Simultaneous Transmit and Receive Operation in Next Generation IEEE 802.11 WLANs: A MAC Protocol Design Approach

Adnan Aijaz, Parag Kulkarni

摘要:

全双工(FD)技术可能在各种传统通信标准中被采用。IEEE 802.11ax工作组一直在考虑用于下一代无线局域网(WLAN)的同时发送和接收(STR)模式。在802.11网络中启用STR模式(FD通信模式)可创建双向FD(BFD)和单向FD(UFD)链路。关键的挑战是以最小的协议修改来集成STR模式,同时考虑FD和传统半双工(HD)站(STA)的共存以及向后兼容性。本文提出了一种简单实用的方法,使STR模式在802.11网络与共存的FD和HD STA。该协议明确考虑了FD环境的特殊性和向后兼容性。所提出的解决方案的关键方面包括FD能力发现、用于信道接入的握手机制、用于UFD传输的节点选择、用于参与BFD或UFD传输的STA的自适应确认(ACK)超时以及竞争不公平性的缓解。性能评估证明了所提出的解决方案在实现下一代无线局域网FD技术的收益方面的有效性。

英文摘要:

Full-duplex (FD) technology is likely to be adopted in various legacy communications standards. The IEEE 802.11ax working group has been considering a simultaneous transmit and receive (STR) mode for the next generation wireless local area networks (WLANs). Enabling STR mode (FD communication mode) in 802.11 networks creates bi-directional FD (BFD) and uni-directional FD (UFD) links. The key challenge is to integrate STR mode with minimal protocol modifications, while considering the co-existence of FD and legacy half-duplex (HD) stations (STAs) and backwards compatibility. This paper proposes a simple and practical approach to enable STR mode in 802.11 networks with co-existing FD and HD STAs. The protocol explicitly accounts for the peculiarities of FD environments and backwards compatibility. Key aspects of the proposed solution include FD capability discovery, handshake mechanism for channel access, node selection for UFD transmission, adaptive acknowledgement (ACK) timeout for STAs engaged in BFD or UFD transmission, and mitigation of contention unfairness. Performance evaluation demonstrates the effectiveness of the proposed solution in realizing the gains of FD technology for next generation WLANs.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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