中图分类号： TN92 文献标识码： A DOI：10.16157/j.issn.0258-7998.200156 中文引用格式： 汪健，丁福建，刘海波，等. 用于可穿戴AR设备的高速低延时无线MAC协议[J].电子技术应用，2020，46(10)：73-78. 英文引用格式： Wang Jian，Ding Fujian，Liu Haibo，et al. High-speed，low-latency wireless MAC protocol for wearable AR devices[J]. Application of Electronic Technique，2020，46(10)：73-78.
High-speed，low-latency wireless MAC protocol for wearable AR devices
Wang Jian，Ding Fujian，Liu Haibo，Liu Wenwen，Lin Qinghao，Lin Min
School of Communication and Information Engineering，Shanghai University，Shanghai 200444，China
Abstract： 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 according 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.
Key words : AR；MAC protocol；short-range wireless；effective throughput；latency
0 引言
随着5G移动通信技术的发展和成熟，增强移动宽带(Enhance Mobile Broadband，EMBB)成为了下一代移动互联网应用的核心技术。增强现实(Augmented Reality，AR)设备由于高速率、大流量、低延时的要求，使其成为了EMBB技术中的核心应用。
