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总览 评价 谢亚男 1， ， 权威 2， ， 苗金华 2， ， 张戬 2， ， 常永宇 1，* （ 1、 北京邮电大学, 100876； 2、 华为技术有限公司北京研究所, 100085； ） 摘要： 传统的上行传输由于时延高而不能满足延迟敏感业务的需求。为了降低时延，LTE-A系统中提出
谢亚男1，， 权威2，， 苗金华2，， 张戬2，， 常永宇1，*
（
1、北京邮电大学, 100876； 2、华为技术有限公司北京研究所, 100085； ）
摘要：
传统的上行传输由于时延高而不能满足延迟敏感业务的需求。为了降低时延，LTE-A系统中提出了基于竞争的上行传输方案。然而，由于多个用户共享相同的上行链路资源，碰撞概率过大。本文中提出了基于协调的上行传输方案，以避免碰撞。基站为一组可以利用D2D相互倾听的用户配置协调资源。当用户设备(UE)发送数据时，它会先在预配置的协调资源上发送请求，并同时监听该资源。在优先级最高的协调资源上发送请求的UE可以发送上行数据。仿真结果表明，我们所提出的方案可以提高资源利用率，同时减少延迟。
关键词：
无线通信技术；基于协调；上行传输
Xie Yanan1,， Quan Wei2,， Miao Jinhua2,， Zhang Jian2,， Chang Yongyu1,*
（
1、Beijing University of Posts and Telecommunications, 100876； 2、Beijing Institute, Huawei Technologies Co., Ltd, 100085； ）
Abstract：
The conventional uplink transmission method suffers from high latency which is not enough to guarantee the requirement of latency sensitive applications, such as Voice over Internet Protocol (VoIP) and real time gaming. In order to decrease the delay, in the Long Term Evolution Advanced (LTE-A) system, contention-based (CB) uplink transmission solution is proposed. This method allocates a contention-based Grant (CB Grant) to a group of uplink synchronized users (i.e., a CB user group). However, collision probability increases with the load due to the same uplink resources shared by several users. In this paper, we proposed a coordination-based uplink transmission method to avoid collisions. The eNB configures the coordination resource to a group of users which can listen to each other by using Device-to-Device (D2D) communication, and one shared Physical Uplink Shared Channel (PUSCH) resources. When a user equipment (UE) has data to transmit, it will send a request and listen on the coordination resource, then UE sending on the coordination resource with the highest priority can transmit uplink data on the shared PUSCH resource. The simulation results demonstrate that our proposed method can improve resource utilization and reduce latency.
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