| 摘要: |
| 水声无线传感器网络(Underwater Acoustic Wireless Sensor Networks，UAWSN)由于复杂的水下环境，面临着节点能量有限、网络传播时延大及吞吐量较低等挑战。为解决这些问题，提出一种时隙状态翻转自适应水声传感网MAC协议(Time-slot State Flip Adaptive Media Access Control Protocol for Underwater Acoustic Sensor Networks，SSFA)。协议通过伪随机方式生成初始时隙调度，基于强化学习的思想根据网络状态自适应动态调整时隙调度计划，并通过冲突检测机制评估当前信道状况，以确定发送数据包的时机，减少了高动态、长时延水声传感网中的数据冲突和网络能耗，提高了网络整体的吞吐量。仿真实验结果显示，与Aloha、S-FAMA和UW-Seedex相比，SSFA协议在吞吐量方面平均提高了35.3%、140.5%和12.7%，在端到端时延方面平均降低了77.8%、40%和30.8%。 |
| 关键词: 水声传感器网络(UAWSN) 媒介访问控制协议 冲突检测 时隙调度 状态翻转 |
| DOI：10.20079/j.issn.1001-893x.241221001 |
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| 基金项目:国家自然科学基金资助项目(62262073)；云南省重大科技专项计划项目(202402AD080002)；云南省应用基础研究计划项目(202101AT070098)；云南省万人计划青年拔尖人才项目(YNWR-QNBJ-2019-237) |
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| Time-slot State Flip Adaptive MAC Protocol for Underwater Acoustic Sensor Networks |
| XU Jie,WANG Min,CAO Bingyan,SHI Jun |
| (a.College of Information Science and Technology;b.Key Laboratory of Educational Informalization for Nationalities，Ministry of Education，Yunnan Normal University，Kunming 650500，China) |
| Abstract: |
| Underwater acoustic wireless sensor networks(UAWSN) are faced with the challenges of limited node energy，large network propagation delay and low throughput due to the complex underwater environment.To address these challenges，a time-slot state flip adaptive media access control protocol for UAWSN(SSFA) is proposed.The protocol generates initial time-slot schedules through pseudorandom allocation and adaptively adjusts scheduling plans based on network status using reinforcement learning principles.By implementing a collision detection mechanism to assess current channel conditions and determine optimal timing for packet transmission，SSFA effectively reduces data collisions and energy consumption in highly dynamic UAWSN with long propagation delays，while significantly enhancing overall network throughput.Simulation results demonstrate that compared with Aloha，S-FAMA，and UW-Seedex protocols，SSFA achieves average improvements of 35.3%，140.5%，and 12.7% in throughput，along with average reductions of 77.8%，40%，and 30.8% in end-to-end latency，respectively. |
| Key words: underwater acoustic sensor network(UAWSN) media access control protocol conflict detection time slot scheduling state flip |
《电讯技术》编辑部 