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发明授权
CN101686547B 一种随机接入信道的频域配置方法、系统和装置 有权 转让

一种随机接入信道的频域配置方法、系统和装置
摘要：
本发明公开了一种随机接入信道(PRACH)的频域配置方法，基站和用户设备UE分别保存PRACH频域配置方式与PRACH频域配置信令的映射关系表，并包括如下步骤：基站根据当前的资源优化策略选择相应的PRACH频域配置方式，并根据所述PRACH频域配置方式查找所述映射关系表得到相应的PRACH频域配置信令，并将所述PRACH频域配置信令下发至UE；UE根据所述PRACH频域配置信令查找映射关系表得到相应的PRACH频域配置方式，根据预先获取的系统带宽信息以及所述PRACH频域配置方式，在频域上配置PRACH。本发明实施例还公开了实现PRACH频域配置的系统和装置。本发明方案能够避免频域碎片的产生，并尽量减小信令开销，降低PRACH不能被探测的可能性。
摘要（英）：

The invention discloses a frequency domain configuration method of random accessing channel (PRACH), PRACH frequency domain configuration modes and a PRACH frequency domain configuration signal mapping relationship table are respectively saved by a base station and user equipment UE, the method comprises the following steps: a corresponding PRACH frequency domain configuration mode is selected bythe base station according to current resource optimizing policy, a corresponding PRACH frequency domain configuration signal is obtained by searching the mapping relationship table according to the PRACH frequency domain configuration mode and is sent to the UE by the base station; the corresponding PRACH frequency domain configuration mode is obtained by searching the mapping relationship tableaccording to the PRACH frequency domain configuration signal and PRACH is configured on the frequency domain according to system bandwidth information which is obtained in advance and the PRACH frequency domain configuration mode by the UE. The embodiment of the invention further discloses a system and a device for realizing PRACH frequency domain configuration. Frequency domain fragment can be avoided to be generated in the invention, signal overhead is reduced to the greatest extent, and possibility that PRACH can not be detected is reduced.

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