论文部分内容阅读
对于LTE网络,物理上行随机接入信道(Physical Random Access Channel,PRACH)的作用是随机接入,是用户进行初始连接、切换、连接重建及上行同步的唯一途径。要确保用户接入的成功率,合理规划物理上行随机接入信道前导码,对网络的接入性能与容量起到至关重要的作用。规划前导码的过程涉及小区的覆盖半径、场景、前导格式及循环位移、物理随机接入信道、前导起始资源块位置的等方面的确定。
For the LTE network, the PRACH function is random access and is the only way for users to perform initial connection, handover, connection reestablishment, and uplink synchronization. To ensure the success rate of user access and reasonably plan the physical uplink random access channel preamble, the network access performance and capacity play a crucial role. The process of planning the preamble involves determining the coverage radius, scenario, preamble format and cyclic shift of the cell, the physical random access channel and the position of the preamble starting resource block.