用于可穿戴AR设备的高速低延时无线MAC协议  

High-speed,low-latency wireless MAC protocol for wearable AR devices

作　　者：汪健 丁福建 刘海波 刘文文 林庆毫 林敏 Wang Jian;Ding Fujian;Liu Haibo;Liu Wenwen;Lin Qinghao;Lin Min(School of Communication and Information Engineering,Shanghai University,Shanghai 200444,China)

机构地区：[1]上海大学通信与信息工程学院,上海200444

出　　处：《电子技术应用》2020年第10期73-78,共6页Application of Electronic Technique

基　　金：国家重点研发计划项目(2019YFB2204500)。

摘　　要：针对消费级AR眼镜与智能手机的无线通信场景需求,提出一种超高速、低功耗、低时延、短距离的定制化无线MAC协议。首先从应用场景的需求出发,对有效吞吐率、时延等指标进行定量分析,再通过指标进行协议的设计。与现有的ECMA-398协议相比,有效吞吐率标准从71%提高到86%,通过引入数据优先级机制来减少延时,使得关键数据的最大帧传输延时相比同类的ECMA-398协议降低了一个量级(小于1 ms);然后根据指标完成系统级模型的搭建与仿真、RTL级的编码与验证;最后通过FPGA平台进行测试。仿真和测试结果表明,所设计的定制化MAC协议可以较好地满足场景需求。For the application scenario of short-range, high speed wireless communication between consumer AR glasses terminal and smart phones, a customized wireless MAC protocol with ultra-high speed, low power, low latency characteristics is presented.Firstly, based on the requirements of the application scenario, quantitative analysis of specifications such as effective throughput and latency are presented, which is followed by detailed protocol design with the target of specifications above. Compared to the existing ECMA-398 protocol, the effective throughput standard increases from 71 % to 86 %. By introducing priority mechanism for various type of data transmission, the maximum frame transmission latency of critical data is reduced by an order of magnitude, which is less than 1 ms. This paper completed the construction and simulation of system-level models, RTL-level coding and verification ac-cording to the analysis above. Finally, the protocol was tested through the FPGA platform. Simulation and test results show that the customized MAC protocol designed in this paper can fulfill the requirement of the scenario much better.

关 键 词：AR MAC协议 短距离无线 有效吞吐率 时延 

分 类 号：TN92[电子电信—通信与信息系统]