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计算机工程 ›› 2020, Vol. 46 ›› Issue (6): 149-154. doi: 10.19678/j.issn.1000-3428.0055014

• 移动互联与通信技术 • 上一篇    下一篇

基于随机多子帧辅助调度的LTE非授权接入方案

张宏升1,2,3, 邹宁3   

  1. 1. 武汉大学 计算机学院, 武汉 430204;
    2. 武汉晴川学院 计算机学院, 武汉 430204;
    3. 中煤科工集团武汉设计研究院有限公司 生态与环保工程院, 武汉 430070
  • 收稿日期:2019-05-24 修回日期:2019-08-06 发布日期:2019-09-05
  • 作者简介:张宏升(1979-),女,讲师、硕士,主研方向为LTE系统开发、通信技术;邹宁,高级工程师、硕士。
  • 基金资助:
    湖北省教育厅科学研究计划指导性项目(B2018400)。

Unlicensed Access Scheme for LTE Based on Stochastic Multi-Subframe Aided Scheduling

ZHANG Hongsheng1,2,3, ZOU Ning3   

  1. 1. School of Computer Science, Wuhan University, Wuhan 430204, China;
    2. College of Computer Science, Wuhan Qingchuan University, Wuhan 430204, China;
    3. Institute of Ecology and Environmental Protection Engineering, Wuhan Design & Research Institute Co., Ltd of China Coal Technology & Engineering Group, Wuhan 430070, China
  • Received:2019-05-24 Revised:2019-08-06 Published:2019-09-05

摘要: 授权辅助接入(LAA)是长期演进高级系统用于在授权和非授权频谱上传输数据的一种载波聚合操作模式。为了与WiFi系统进行共存,LAA需要执行通话前侦听,这会降低其资源利用率。为此,提出一种提高上行LAA数据传输性能的多子帧调度(MSS)方案。允许用户设备具有多个信道感测机会或连续地传输多个子帧数据。提供能够最大化LAA资源利用率的MSS最佳参数配置,并对基于调度的方案和MSS方案进行评估和比较,结果表明,MSS方案可显著提高未授权频谱的资源利用率。

关键词: 随机接入, 多子帧, 辅助调度, 长期演进, 非授权许可

Abstract: Licensed Auxiliary Access(LAA) is a new carrier aggregation operation mode for Long-Term Evolution(LTE) advanced systems to transmit data over authorized and unauthorized spectrums.To coexist with WiFi systems,LAA need to perform pre-call listening,which significantly affects their resource utilization.To address the problem,this paper proposes a Multi-Subframe Scheduling(MSS) to improve the performance of uplink LAA data transmission.MSS allows user equipment to have multiple channel sensing and measurement opportunities to continuously transmit data of multiple subframes.The best parameter configuration of MSS that maximizes the utilization of LAA resources is provided,and the MSS scheme is compared with scheduling-based schemes.Results show that the proposed MSS scheme can significantly improve the resource utilization of unlicensed spectrum.

Key words: random access, multiple subframes, aided scheduling, Long-Term Evolution(LTE), unlicensed permission

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