LTE_PRACH配置参数分析
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LTE PRACH参数配置分析
目录
目录 (2)
1引言 (3)
1.1 编写目的 (3)
1.2 文档组织 (3)
1.3 预期读者和阅读建议 (3)
1.4 参考资料 (3)
1.5 缩写术语和常用符号 (3)
2PRACH信道的配置分析 (5)
2.1 PRACH信道的配置参数 (5)
2.1.1PRACH配置索引（prach-ConfigurationIndex） (5)
2.1.2零相关配置（zeroCorrelationZoneConfig） (13)
2.1.3根序列索引（rootSequenceIndex） (17)
2.1.4是否为高速状态（highSpeedFlag） (20)
2.1.5频率偏移（prach-FrequencyOffset） (21)
2.2 PRACH信道的参数的配置方法 (21)
2.2.1PRACH信道参数的配置步骤 (21)
2.2.2邻小区的PRACH信道的配置 (22)
3LTE典型PRACH配置 (23)
3.1 F ORMAT 0时PRACH信道的参数的配置 (23)
3.1.1密度为1情况下PRACH相关参数配置 (23)
3.1.2密度为2情况下PRACH相关参数配置 (24)
3.2 F ORMAT 4时PRACH信道的参数的配置 (26)
4高速模式下配置原则 (27)
5附录 (30)
5.1 南京规模实验网站址分布图 (30)
1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 》V1.1
2.《LTE PRACH密度需求分析.doc》V1.0
3.《LTE——UMTS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
2PRACH信道的配置分析
2.1PRACH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）
✧是否为高速状态（highSpeedFlag）
✧频率偏移（prach-FrequencyOffset）
2.1.1PRACH配置索引（prach-ConfigurationIndex）
2.1.1.1参数基本信息
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。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（0~47为前导格式0~3，47~57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)
0 1 2 3 4 5 6
0 (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) (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/A N/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)
(0,0,0,2)
(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/A N/A (0,0,0,1)
(0,0,1,0)
8 (0,0,0,0)
(0,0,1,0) N/A N/A (0,0,0,0)
(0,0,0,1)
N/A N/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)
(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)
11 N/A (0,0,0,0)
(0,0,0,1)
(0,0,1,0) N/A N/A N/A N/A (0,0,0,1)
(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)
(0,0,1,0)
(0,0,1,2) N/A N/A (0,0,0,0)
(0,0,0,1)
(0,0,0,2)
(1,0,0,1)
N/A N/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/A N/A (0,0,0,0)
(0,0,0,1)
(0,0,0,2)
(1,0,0,0)
N/A N/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)
(0,0,1,1)
(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)
(0,0,0,1)
(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/A N/A
17 (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/A N/A N/A
18 (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)
(1,0,0,0)
(1,0,1,0)
(2,0,0,0)
(2,0,1,0)
(0,0,0,0)
(0,0,0,1)
(0,0,0,2)
(1,0,0,0)
(1,0,0,1)
(1,0,0,2)
(0,0,0,0)
(0,0,0,1)
(1,0,0,0)
(1,0,0,1)
(2,0,0,0)
(2,0,0,1)
(0,0,0,0)
(1,0,0,0)
(2,0,0,0)
(3,0,0,0)
(4,0,0,0)
(5,0,0,0)
(0,0,0,0)
(0,0,0,1)
(0,0,0,2)
(0,0,1,0)
(0,0,1,1)
(1,0,0,2)
19 N/A (0,0,0,0)
(0,0,0,1)
(0,0,1,0)
(0,0,1,1)
(1,0,0,0)
(1,0,1,0) N/A N/A N/A N/A (0,0,0,0)
(0,0,0,1)
(0,0,0,2)
(0,0,1,0)
(0,0,1,1)
(1,0,1,1)
20 / 30 (0,1,0,1) (0,1,0,0) N/A (0,1,0,1) (0,1,0,0) N/A (0,1,0,1)
21 / 31 (0,2,0,1) (0,2,0,0) N/A (0,2,0,1) (0,2,0,0) N/A (0,2,0,1)
22 / 32 (0,1,1,1) (0,1,1,0) N/A N/A N/A N/A (0,1,1,0)
23 / 33 (0,0,0,1) (0,0,0,0) N/A (0,0,0,1) (0,0,0,0) N/A (0,0,0,1)