基于多信道预约可冲突避免的多址接入协议

本文为多跳分布多无线网络提出了一套灵活而有效的自适应获取冲突避免（AACA）的多址接入协议。在该协议中，各节点竞争公共信道，利用RTS/CTS对话形式来预约各业务信道，成功预约后的分组传输不会受到其他节点的干扰。它使用任意确定数目信道，以异步方式工作，并且使得各节点利用半双工无线电台就可以灵活、简便地实现资源预约。分析和比较结果说明，所提出的多信道预约协议可以有效地解决隐藏终端、暴露终端以及侵入终端的问题。

A reservation-based multi-channel multiple access protocol with collision avoidance

A flexible and effective medium access control (MAC) protocol called adaptive acquisition collision avoidance (AACA) multiple access for multihop wireless ad hoc networks is presented. In this scheme, one channel is used as the common channel for mobile users (or nodes) contending to reserve traffic channels by means of request-to-send and clear-to-send (RTS/CTS) dialogue. Other channels are used as traffic channels without collision. With this protocol, resource reservation is flexibly and effectively made on multiple frequency bands or spread-spectrum codes by half-duplex radios without any help of powerful base stations (BS) and wired backbone networks in an asynchronous fashion. The proposed protocol can use any number of channels and solve hidden, exposed and intruding terminal problems perfectly as is validated through our analysis and numerical results.