异构M2M网络可扩展混合MAC协议设计
Design of A Scalable Hybrid MAC Protocol for Heterogeneous M2M Networks
摘要：
健壮且弹性的介质访问控制（MAC）协议对于许多机器类型设备并发地访问机器对机器（M2M）网络中的信道是至关重要的。在大多数文献中研究的是单纯的（基于预留或竞争的）MAC协议，这可能无法为具有大量异构设备的M2M网络提供可扩展的解决方案。本文针对异构M2M网络，设计了一种可扩展的混合MAC协议，该协议由竞争周期和传输周期组成。在该协议中，具有预设优先级（分层竞争概率）的不同设备首先遵循基于约定的$p$ -持久CSMA机制竞争传输机会。只有成功的设备将被分配一个时隙，用于遵循基于预留的TDMA机制进行传输。如果设备在前一帧竞争失败，为了保证所有设备之间的公平性，将通过增加它们在下一帧的竞争概率来提高它们的竞争优先级。为了平衡竞争和传输周期之间的权衡，在每帧中，制定了一个优化问题，以最大限度地提高信道效用，通过找到关键的设计参数：竞争持续时间，初始竞争概率和增量指示。分析和仿真结果表明了该混合MAC协议的有效性。
英文摘要：
A robust and resilient Medium Access Control (MAC) protocol is crucial for numerous machine-type devices to concurrently access the channel in a Machine-to-Machine (M2M) network. Simplex (reservation or contention based) MAC protocols are studied in most literatures which may not be able to provide a scalable solution for M2M networks with large number of heterogeneous devices. In this paper, a scalable hybrid MAC protocol, which consists of a contention period and a transmission period, is designed for heterogeneous M2M networks. In this protocol, different devices with pre-set priorities (hierarchical contending probabilities) firstly contend the transmission opportunities following the convention based $p$-persistent CSMA mechanism. Only the successful devices will be assigned a time slot for transmission following the reservation based TDMA mechanism. If the devices failed in contention at previous frame, to ensure the fairness among all devices, their contending priorities will be raised by increasing their contending probabilities at the next frame. To balance the tradeoff between the contention and transmission period in each frame, an optimization problem is formulated to maximize the channel utility by finding the key design parameters: the contention duration, initial contending probability and the incremental indicator. Analytical and simulation results demonstrate the effectiveness of the proposed Hybrid MAC protocol.
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。
