A Physical/Virtual Carrier-Sense-Based Power Control MAC Protocol for Collision Avoidance in Wireless Ad Hoc Networks
A Physical/Virtual Carrier-Sense-Based Power Control MAC Protocol for Collision Avoidance in Wireless Ad Hoc Networks
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DOI：
10.1109/tpds.2010.75
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发表时间：
2011-02
影响因子：
5.3
通讯作者：
K. Shih;Yen-Da Chen;Chau-Chieh Chang
中科院分区：
文献类型：
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作者：
K. Shih;Yen-Da Chen;Chau-Chieh Chang
在无线自组织网络中，由于发送方的发射功率受到控制，接收方的干扰范围扩大，从而导致隐藏终端问题，称为POINT问题。本文利用物理和虚拟载波侦听方案，以避免点的问题。我们分析了在采用功率控制的情况下，传输范围，载波侦听范围和干扰范围之间的关系，并根据分析结果，我们提出了四种机制，以防止点问题发生在无线ad hoc网络。本文进一步分析了每种机制在特定情况下的优越性，并提出了一种自适应的基于范围的功率控制（ARPC）MAC协议，利用这四种机制的优点来避免POINT问题的发生。该协议不仅可以防止由POINT问题引起的冲突，而且还可以减少STA的能量消耗。仿真结果也验证了所提出的协议的优点。
A kind of hidden terminal problem, called the POINT problem, which is caused by the expansion of the interference range of the receiver due to the controlled transmission power of the sender, is deemed a notorious problem in wireless ad hoc networks. This paper utilizes physical and virtual carrier-sensing schemes to avoid the POINT problem. We analyze the relationships among the transmission range, the carrier-sensing range, and the interference range in case power control is adopted, and based on the analyzed results, we propose four mechanisms to prevent the POINT problem from occurring in wireless ad hoc networks. This paper further analyzes the superiority of each mechanism under certain situations and proposes an adaptive range-based power control (ARPC) MAC protocol to make use of the advantages of the four mechanisms to avoid the POINT problem from happening. The proposed protocol cannot only prevent collisions caused by the POINT problem, but it can also reduce the energy consumption of STAs. Simulation results also verify the advantages of the proposed protocol.