Distributed Physical-layer Network Coding MAC protocol

IF 4.4 3区 计算机科学 Q1 COMPUTER SCIENCE, INFORMATION SYSTEMS Ad Hoc Networks Pub Date : 2023-11-03 DOI:10.1016/j.adhoc.2023.103344
Mohammed Aissaoui , Chiraz Houaidia , Adrien Van Den Bossche , Thierry Val , Leïla Azouz Saidane
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Abstract

Physical-layer Network Coding (PNC) was first proposed for a Two-Way Relay Channel (TWRC) to improve the spectrum efficiency since it allows nodes to transmit simultaneously via a relay node. This technique requires multiple nodes to transmit their packets with accurate synchronization. Therefore, in many works of literature, centralized scheduling with perfect synchronization has been assumed to be employed on top of PNC.

Such assumptions are not applicable in general random access multi-hop wireless networks. Therefore, this paper proposes a distributed MAC protocol that supports PNC in static multi-hop wireless networks. The proposed MAC protocol is based on the Carrier Sense Multiple Access (CSMA) strategy, where RTS/CTS frames are used to detect PNC opportunities and to offer the appropriate scheduling of the involved transmissions that should occur simultaneously. This packet exchange process is coordinated by the relay node and was designed to guarantee compatibility with other conventional relaying schemes with specific concerns for the hidden node issues. Our solution was practically tested on a real testbed with different static wireless topologies and several physical settings.

With numerical results, we investigate the effectiveness of PNC in distributed wireless multi-hop networks. Compared to the conventional CSMA/CA and the PNC opportunistic (PNCOPP) MAC protocols, the proposed protocol’s performances are advantageous in various scenarios, especially in large networks.

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分布式物理层网络编码MAC协议
物理层网络编码(PNC)首先被提出用于双向中继信道(TWRC),以提高频谱效率,因为它允许节点通过中继节点同时传输。这种技术要求多个节点以精确的同步传输它们的数据包。因此,在许多文献中,都假定在PNC之上采用了具有完全同步的集中式调度。这种假设不适用于一般的随机存取多跳无线网络。为此,本文提出了一种在静态多跳无线网络中支持PNC的分布式MAC协议。提出的MAC协议基于载波感知多址(CSMA)策略,其中RTS/CTS帧用于检测PNC机会,并提供应同时发生的相关传输的适当调度。这种分组交换过程由中继节点协调,并被设计为保证与其他传统中继方案的兼容性,并特别关注隐藏节点问题。我们的解决方案在具有不同静态无线拓扑和几种物理设置的真实测试台上进行了实际测试。通过数值结果研究了PNC算法在分布式无线多跳网络中的有效性。与传统的CSMA/CA和PNC机会型(PNCOPP) MAC协议相比,该协议的性能在各种场景下都具有优势,特别是在大型网络中。
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来源期刊
Ad Hoc Networks
Ad Hoc Networks 工程技术-电信学
CiteScore
10.20
自引率
4.20%
发文量
131
审稿时长
4.8 months
期刊介绍: The Ad Hoc Networks is an international and archival journal providing a publication vehicle for complete coverage of all topics of interest to those involved in ad hoc and sensor networking areas. The Ad Hoc Networks considers original, high quality and unpublished contributions addressing all aspects of ad hoc and sensor networks. Specific areas of interest include, but are not limited to: Mobile and Wireless Ad Hoc Networks Sensor Networks Wireless Local and Personal Area Networks Home Networks Ad Hoc Networks of Autonomous Intelligent Systems Novel Architectures for Ad Hoc and Sensor Networks Self-organizing Network Architectures and Protocols Transport Layer Protocols Routing protocols (unicast, multicast, geocast, etc.) Media Access Control Techniques Error Control Schemes Power-Aware, Low-Power and Energy-Efficient Designs Synchronization and Scheduling Issues Mobility Management Mobility-Tolerant Communication Protocols Location Tracking and Location-based Services Resource and Information Management Security and Fault-Tolerance Issues Hardware and Software Platforms, Systems, and Testbeds Experimental and Prototype Results Quality-of-Service Issues Cross-Layer Interactions Scalability Issues Performance Analysis and Simulation of Protocols.
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