《计算机应用》唯一官方网站 ›› 2024, Vol. 44 ›› Issue (3): 863-868.DOI: 10.11772/j.issn.1001-9081.2023030322

• 网络与通信 • 上一篇    下一篇

基于自适应p持续的移动自组网信道接入和资源分配算法

秦鑫彤1, 宋政育1(), 侯天为1, 王飞越1, 孙昕1, 黎伟2   

  1. 1.北京交通大学 电子信息工程学院,北京 100044
    2.重庆金美通信有限责任公司,重庆 400030
  • 收稿日期:2023-03-29 修回日期:2023-05-29 接受日期:2023-06-08 发布日期:2023-06-30 出版日期:2024-03-10
  • 通讯作者: 宋政育
  • 作者简介:秦鑫彤(1999—),男,山西长治人,博士研究生,主要研究方向:无线通信、移动自组网、资源分配
    侯天为(1991—),男,天津人,副教授,博士,主要研究方向:无人机通信、大规模反射阵列、非正交多址接入
    王飞越(1999—),男,甘肃金昌人,硕士研究生,主要研究方向:无线通信、移动自组网、资源分配
    孙昕(1967—),女,吉林通化人,教授,博士,主要研究方向:专业移动通信、卫星通信、物联网
    黎伟(1988—),男,重庆人,高级工程师,博士,主要研究方向:无线通信电磁频谱感知、电磁干扰对抗、下一代移动通信关键技术。
  • 基金资助:
    国家自然科学基金资助项目(61901027)

Channel access and resource allocation algorithm for adaptive p-persistent mobile ad hoc network

Xintong QIN1, Zhengyu SONG1(), Tianwei HOU1, Feiyue WANG1, Xin SUN1, Wei LI2   

  1. 1.School of Electronic and Information Engineering,Beijing Jiaotong University,Beijing 100044,China
    2.Chongqing Jinmei Communication Company Limited,Chongqing 400030,China
  • Received:2023-03-29 Revised:2023-05-29 Accepted:2023-06-08 Online:2023-06-30 Published:2024-03-10
  • Contact: Zhengyu SONG
  • About author:QIN Xintong, born in 1999, Ph. D. candidate. His research interests include wireless communication, mobile Ad Hoc network, resource allocation.
    HOU Tianwei, born in 1991, Ph. D., associate professor. His research interests include UAV communication, large scale reflective array, non-orthogonal multiple access.
    WANG Feiyue, born in 1999, M. S. candidate. His research interests include wireless communication, mobile Ad Hoc network, resource allocation.
    SUN Xin, born in 1967, Ph. D., professor. Her research interests include professional mobile communication, satellite communication, internet of things.
    LI Wei, born in 1988, Ph. D., senior engineer. His research interests include wireless communication electromagnetic spectrum sensing, electromagnetic interference countermeasures, next-generation mobile communication key technologies.
  • Supported by:
    National Natural Science Foundation of China(61901027)

摘要:

针对基于p持续的移动自组网(MANET)信道接入和资源分配问题,提出一种具有低复杂度的自适应信道接入和资源分配算法。首先,考虑到自组网无中心分布式组网特点,以每个节点的信道利用率最大化为目标建立优化问题;其次将该问题建模为马尔可夫决策过程并定义状态、动作和奖励函数;最后基于策略梯度训练网络参数,联合优化竞争概率、优先级增长因子以及通信节点数量。仿真实验结果表明,所提算法可以显著提高p-持续载波侦听多址接入(CSMA)协议的性能,与固定竞争概率和p值预定义的方案相比,所提算法的信道利用率提高了45%和17%;此外,当节点数量小于35时,所提算法优于固定接入节点数量的方案同时,在节点数据包到达率较高时,所提算法可以充分利用信道,减少时隙资源浪费。

关键词: 移动自组网, 载波侦听多址接入, 深度强化学习, 信道利用率, 资源分配

Abstract:

For the channel access and resource allocation problem in the p-persistent Mobile Ad hoc NETwork (MANET), an adaptive channel access and resource allocation algorithm with low complexity was proposed. Firstly, considering the characteristics of MANET, the optimization problem was formulated to maximize the channel utility of each node. Secondly, the formulated problem was then transformed into a Markov decision process and the state, action, as well as the reward function were defined. Finally, the network parameters were trained based on policy gradient to optimize the competition probability, priority growth factor, and the number of communication nodes. Simulation experiment results indicate that the proposed algorithm can significantly improve the performance of p-persistent CSMA (Carrier Sense Multiple Access) protocol. Compared with the scheme with fixed competition probability and predefined p-value, the proposed algorithm can improve the channel utility by 45% and 17%, respectively. The proposed algorithm can also achieve higher channel utility compared to the scheme with fixed number of communication nodes when the total number of nodes is less than 35. Most importantly, with the increase of packet arrival rate, the proposed algorithm can fully utilize the channel resource to reduce the idle period of time slot.

Key words: Mobile Ad hoc NETwork (MANET), Carrier Sense Multiple Access (CSMA), deep reinforcement learning, channel utility, resource allocation

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