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1、 EV-DO 参数 EV-DO 参数 1 EVDO参数介绍 2 EVDO参数修改 目录1. EVDO参数介绍 接入参数 切换参数 寻呼参数 多载频参数 过载控制参数目录接入参数接入序列接入参数接入信道组成PreambleMax Capsule SizeAccess transmission max lengthAccessSlot NAccessSlot N+1AccessSlot N+226.66ms Access Channel FrameAccess Cycle DurationSystemTime 1-7frames1 - 15 framesAccess Cycle Duration接
2、入相关参数 参数名：Sector Size在GUI中的位置：Sectors - General / Service Node - General section 2参数描述：The maximum range of a cells desired coverage. It accommodates the maximum possible air propagation delay (one way). Non-updatable. Service Node:EVC down/up. Sectors: Restart EVM.推荐值：10 Miles接入相关参数 参数名：Maximum num
3、ber for an access probe sequence在GUI中的位置：Sectors - General / Service Node - General section 2参数描述：Maximum allowable number of access probe sequences for a single access attempt, either AT initiated or AN initiated. Updatable推荐值：2接入相关参数 参数名：Number of access probes在GUI中的位置：Sectors - General / Service
4、Node - General section 2参数描述：Maximum allowable number of access probe sequences for a single access attempt, either AT initiated or AN initiated. Updatable推荐值：5接入相关参数 参数名：Access preamble length在GUI中的位置：Sectors - Configuration / Service Node - General section 2参数描述：The access channel preamble is a se
5、ries of known symbols transmitted in the beginning portion of each access channel probe to assist the base station in detecting ATs signal through the whole range of delay hypotheses tests. Non-updatable. Service Node:EVC down/up. Sectors: Restart EVM.推荐值：1 Frames接入相关参数 参数名：Access capsule max length
6、在GUI中的位置：Sectors - Configuration / Service Node - General section 2参数描述：The maximum access message capsule length that will be used for the access message. The capsule length should be large enough to contain at least two access channel messages because, for any access channel message, the route upd
7、ate message is always included. Non-updatable. Service Node:EVC down/up. Sectors: Restart EVM.推荐值：4 Frames接入相关参数 参数名：Access cycle duration在GUI中的位置：Sectors - Access Control / Service Node - General section 2参数描述：The This parameter indicates to the AT the duration of an Access Channel Cycle in units o
8、f slots.Although the range of this parameter is 1-255, the BTS EVM generally doesnt support the full range. For both dual board EVM and SB-EVM, only the values 16, 32, 64, & 128 are supported. If a value is entered that is not supported on the EVM, then the default setting 64 slots will be used. Non
9、-updatable. Service Node:EVC down/up. Sectors: Restart EVM.推荐值：16 slots接入相关参数 参数名：Access channel probe backoff在GUI中的位置：Sectors - Configuration / Service Node - General section 2参数描述：If the maximum allowable number of access probes has not been reached, the next access probe is transmitted after TA +
10、 RT time. TA is a fixed waiting time defined by the IS-856 standard as 128 slots (213.376 ms) whereas RT is an additional random delay, which ranges from 0 to probe backoff in the units of access cycle duration. Updatable.推荐值：4 接入相关参数 参数名：Access channel probe sequence backoff在GUI中的位置：Sectors - Confi
11、guration / Service Node - General section 2参数描述：If the maximum allowable number of access probe sequences has not been reached, the next access probe in the next access probe sequence is transmitted after TA + RS time. TA is a fixed waiting time defined by the IS-856 standard as 128 slots (213.376 m
12、s) whereas RS is an additional random delay, which rangesfrom 0 to probesequencebackoff in the units of access cycle duration. Updatable.推荐值：8参数名：Open loop power adjustment在GUI中的位置：Sectors - Access Control /Service Node - General section 2参数描述：The nominal power used by an AT for initial transmission
13、 on the access channel. The value used by the AT is (1) times the value of open loop adjust. Updatable.推荐值：81 接入相关参数 参数名：Initial probe power correction factor在GUI中的位置：Sectors - Access Control / Service Node - General section 2参数描述：Correction factor to be used by an AT for open loop transmit power es
14、timation for initial transmission on the access channel. Updatable.推荐值：0接入相关参数 参数名：Power Increment Step在GUI中的位置：Sectors - Configuration / Service Node - General section 2参数描述：Power increment between two consecutive access probes within one access probe sequence. The recommended value is 8 (4 dB). Th
15、e allowed values are 0 to 15. The AT uses 0.5 dB times the value set in the database. Updatable.推荐值：8 (4db)接入相关参数 接入参数 切换参数 寻呼参数 多载频参数 过载控制参数目录切换参数手机以第一个被解调的多径信号为参考点假设：如果某个多径信号与最先被解调的信号之间的延迟为15个Chips, 则Srch_Win_A应大于2*15=30 Chips以保证该多径信号被正确解调。切换参数参数名：Search Window Size for the Active/Candidate Set在GUI中的位置：Sectors - Access Control / Service Node Search Window Size参数描述：This parameter indicates
