TD-LTE下行系统中 PDSCH资源映射设计与实现

物理下行共享信道(PDSCH)是长期演进(LTE)下行系统中主要承载用户数据的物理通道, 在资源映射过程中, 需避让其他信道或信号, 逻辑复杂, 加大了实现难度。本文在分析 PDSCH资源映射原理的基础上, 将其映射过程根据避让情形分为 5类, 并提出了符号级、资源块组(RBG)级等 2级跳转条件和符号级、 RBG级、资源粒子(RE)级等 3种跳转处理方式, 通过对位图进行参数提取, 设计出一种支持下行所有带宽配置的映射方案。该方案资源开销小, 可扩展性强, 已应用到 LTE基站项目的开发中。

Abstract

In Long Term Evolution(LTE) downlink system, Physical Downlink Shared Channel(PDSCH) is the main physical channel carrying user data. In resource-mapping, these data mapping to elements not reserved for other channels or signals makes implementation more logically complex. By analyzing the principle of PDSCH resource mapping, the paper divides the mapping process into five categories depending on avoidance situations. Also, two jumping conditions including symbol-level, Resource Block Group(RBG)-level are proposed; and three jumping treatments: symbol-level, RBG-level, Resource Element(RE-level, are introduced. Finally, coupled with parameters extracted from bitmap, a mapping scheme supporting all downlink bandwidth kinds is designed. The scheme with low cost and strong scalability has been applied to the development of LTE base station project.

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何云瑞, 张瑞齐, 宋华, 李宗强, 艾渤. TD-LTE下行系统中 PDSCH资源映射设计与实现[J]. 太赫兹科学与电子信息学报, 2016, 14(6): 885. HE Yunrui, ZHANG Ruiqi, SONG Hua, LI Zongqiang, AI Bo. Design and implementation of PDSCH resource-mapping in TD-LTE downlink system[J]. Journal of terahertz science and electronic information technology, 2016, 14(6): 885.

TD-LTE下行系统中 PDSCH资源映射设计与实现

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