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1、LTE PRACH参数配置分析 LTE PRACH参数配置分析 目录目录31引言41.1编写目的41.2文档组织41.3预期读者和阅读建议41.4参考资料41.5缩写术语和常用符号42PRACH信道的配置分析62.1PRACH信道的配置参数62.1.1PRACH配置索引（prach-ConfigurationIndex）62.1.2零相关配置（zeroCorrelationZoneConfig）142.1.3根序列索引（rootSequenceIndex）182.1.4是否为高速状态（highSpeedFlag）212.1.5频率偏移（prach-FrequencyOffset）222.2PR
2、ACH信道的参数的配置方法232.2.1PRACH信道参数的配置步骤232.2.2邻小区的PRACH信道的配置233LTE典型 PRACH配置243.1Format 0时 PRACH信道的参数的配置243.1.1密度为1情况下PRACH相关参数配置243.1.2密度为2情况下PRACH相关参数配置263.2Format 4时 PRACH信道的参数的配置274高速模式下配置原则295附录325.1南京规模实验网站址分布图321 引言1.1 编写目的本文档的编写目的是分析PRACH信道的各参数的配置方法及各邻区间如何进行配置。1.2 文档组织本文首先对LTE3.0版本需要配置的PRACH信道的各参
3、数进行了说明和描述，根据网络规划如何确定各参数的取值，并给出相邻小区各参数的配置原则。本文在第2章的后半部分给出了PRACH各参数的配置方法和步骤。第3章给出了高速模式下的零相关和根序列的配置有一定的关联关系。1.3 预期读者和阅读建议本文档的预期读者为LTE网络建设人员和LTE网络优化人员、测试人员等。1.4 参考资料1. LTE无线配置参数分析.doc V1.12. LTE PRACH密度需求分析.docV1.03. LTEUMTS长期演进理论与实践马霓、邬钢等译4. 3GPP TS 36.211 Physical Channels and Modulation 1.5 缩写术语和常用符号
4、英文缩写英文全称中文全称CMCubic Metric立方量度PAPRPeak-to-Average Power Ratio峰均值功率比PRACHPhysical Random Access Channel物理随机接入信道RACHRandom Access Channel随机接入信道2 PRACH信道的配置分析2.1 PRACH信道的配置参数LTE 中PRACH信道的配置参数主要有五个，都是小区级参数分别是： PRACH配置索引（prach-ConfigurationIndex） 零相关配置（zeroCorrelationZoneConfig） 根序列索引（rootSequenceIndex）
5、是否为高速状态（highSpeedFlag） 频率偏移（prach-FrequencyOffset）2.1.1 PRACH配置索引（prach-ConfigurationIndex）2.1.1.1 参数基本信息参数编号取值范围物理单位调整步长0.63默认值：51无无参数名称传送途径作用范围参数出处prach-ConfigurationIndexeNodeB-UECell36.211所属网元及设置途径小区逻辑无线资源参数-物理随机接入信道- PRACH配置索引不同场景下的差异化配置说明无用于指示小区的PRACH配置索引。该参数指示了PRACH的频域资源索引、时域的无线帧、半帧、子帧的资源占用情况
6、。该参数确定后，小区PRACH的时、频资源即可确定，同时也确定了采用的前导格式（047为前导格式03，4757为前导格式4），其定义见下表（36.211 Table 5.7.1-4）。PRACH configuration Index(See Table 5.7.1-3)UL/DL configuration (See Table 4.2-2)01234560(0,1,0,2)(0,1,0,1)(0,1,0,0)(0,1,0,2)(0,1,0,1)(0,1,0,0)(0,1,0,2)1(0,2,0,2)(0,2,0,1)(0,2,0,0)(0,2,0,2)(0,2,0,1)(0,2,0,0)(
7、0,2,0,2)2(0,1,1,2)(0,1,1,1)(0,1,1,0)(0,1,0,1)(0,1,0,0)N/A(0,1,1,1)3(0,0,0,2)(0,0,0,1)(0,0,0,0)(0,0,0,2)(0,0,0,1)(0,0,0,0)(0,0,0,2)4(0,0,1,2)(0,0,1,1)(0,0,1,0)(0,0,0,1)(0,0,0,0)N/A(0,0,1,1)5(0,0,0,1)(0,0,0,0)N/A(0,0,0,0)N/AN/A(0,0,0,1)6(0,0,0,2)(0,0,1,2)(0,0,0,1)(0,0,1,1)(0,0,0,0)(0,0,1,0)(0,0,0,1)(0
8、,0,0,2)(0,0,0,0)(0,0,0,1)(0,0,0,0)(1,0,0,0)(0,0,0,2)(0,0,1,1)7(0,0,0,1)(0,0,1,1)(0,0,0,0)(0,0,1,0)N/A(0,0,0,0)(0,0,0,2)N/AN/A(0,0,0,1)(0,0,1,0)8(0,0,0,0)(0,0,1,0)N/AN/A(0,0,0,0)(0,0,0,1)N/AN/A(0,0,0,0)(0,0,1,1)9(0,0,0,1)(0,0,0,2)(0,0,1,2)(0,0,0,0)(0,0,0,1)(0,0,1,1)(0,0,0,0)(0,0,1,0)(1,0,0,0)(0,0,0,0
9、)(0,0,0,1)(0,0,0,2)(0,0,0,0)(0,0,0,1)(1,0,0,1)(0,0,0,0)(1,0,0,0)(2,0,0,0)(0,0,0,1)(0,0,0,2)(0,0,1,1)10 (0,0,0,0)(0,0,1,0) (0,0,1,1) (0,0,0,1)(0,0,1,0) (0,0,1,1) (0,0,0,0)(0,0,1,0) (1,0,1,0)N/A(0,0,0,0)(0,0,0,1)(1,0,0,0)N/A (0,0,0,0)(0,0,0,2)(0,0,1,0)11N/A(0,0,0,0) (0,0,0,1)(0,0,1,0)N/AN/AN/AN/A (0,0
10、,0,1)(0,0,1,0)(0,0,1,1)12(0,0,0,1)(0,0,0,2)(0,0,1,1)(0,0,1,2)(0,0,0,0)(0,0,0,1)(0,0,1,0)(0,0,1,1)(0,0,0,0)(0,0,1,0)(1,0,0,0)(1,0,1,0)(0,0,0,0)(0,0,0,1)(0,0,0,2)(1,0,0,2)(0,0,0,0)(0,0,0,1)(1,0,0,0)(1,0,0,1)(0,0,0,0)(1,0,0,0)(2,0,0,0)(3,0,0,0)(0,0,0,1)(0,0,0,2)(0,0,1,0)(0,0,1,1)13(0,0,0,0)(0,0,0,2)(0,
11、0,1,0)(0,0,1,2)N/AN/A(0,0,0,0)(0,0,0,1)(0,0,0,2)(1,0,0,1)N/AN/A(0,0,0,0)(0,0,0,1)(0,0,0,2)(0,0,1,1)14(0,0,0,0)(0,0,0,1)(0,0,1,0)(0,0,1,1)N/AN/A(0,0,0,0)(0,0,0,1)(0,0,0,2)(1,0,0,0)N/AN/A(0,0,0,0)(0,0,0,2)(0,0,1,0)(0,0,1,1)15(0,0,0,0)(0,0,0,1)(0,0,0,2)(0,0,1,1)(0,0,1,2)(0,0,0,0)(0,0,0,1)(0,0,1,0)(0,0,
12、1,1)(1,0,0,1)(0,0,0,0)(0,0,1,0)(1,0,0,0)(1,0,1,0)(2,0,0,0)(0,0,0,0)(0,0,0,1)(0,0,0,2)(1,0,0,1)(1,0,0,2)(0,0,0,0)(0,0,0,1)(1,0,0,0)(1,0,0,1)(2,0,0,1)(0,0,0,0)(1,0,0,0)(2,0,0,0)(3,0,0,0)(4,0,0,0)(0,0,0,0)(0,0,0,1)(0,0,0,2)(0,0,1,0)(0,0,1,1)16(0,0,0,1)(0,0,0,2)(0,0,1,0)(0,0,1,1)(0,0,1,2)(0,0,0,0)(0,0,0
13、,1)(0,0,1,0)(0,0,1,1)(1,0,1,1)(0,0,0,0)(0,0,1,0)(1,0,0,0)(1,0,1,0)(2,0,1,0)(0,0,0,0)(0,0,0,1)(0,0,0,2)(1,0,0,0)(1,0,0,2)(0,0,0,0)(0,0,0,1)(1,0,0,0)(1,0,0,1)(2,0,0,0)N/AN/A17(0,0,0,0)(0,0,0,1)(0,0,0,2)(0,0,1,0)(0,0,1,2)(0,0,0,0)(0,0,0,1)(0,0,1,0)(0,0,1,1)(1,0,0,0)N/A(0,0,0,0)(0,0,0,1)(0,0,0,2) (1,0,0,0)(1,0,0,1)N/AN/AN/A18(0,0,0,0)(0,0,0,1)(0,0,0,2)(0,0,1,0)(0,0,1,1)(0,0,1,2)(0,0,0,0)(0,0,0,1)(0,0,1,0)(0,0,1,1)(1,0,0,1)(1,0,1,1)(0,0,0,0)(0,0,1,0)
