图6-2VoLTE Call参数设置
表3-4VoLTE Call参数列表
参数级别 参数名 Remark 参数缩写 actEnhAcAnd GbrServices 参数意义 推荐值 LNBTS Activate enhanced AC and GBR services LNBTS LNBTS Activate multiple GBR bearers Activate multiple bearers actmultGbrbearers actMultBearers This parameter activates support of the following features ARP based Admission Control (LTE534), Smart Admission Control, comprising RAC and TAC (LTE497) and EPS bearers with QCI 2, 3 and 4(LTE496).Feature LTE496 introduces support of QCI 2, 3, and 4 along with higher guaranteed bit rates and related congestion detection and handling mechanisms.Admission control functionality (LTE497) is extended at the same time from a counter based solution to become load based and offer in addition congestion handling functionality to better address FALSE the needs being imposed by higher guaranteed bit rates.Finally the ARP based admission control (LTE534) allows to consider the ARP priority in load-based admission and admission related pre-emption as well as in congestion handling as an additional more service-related dimension for differentiated treatment of bearers with guaranteed resources.As those features are closely inter-related, they are activated via a common activation parameter. his parameter activates the support of multiple GBR EPS Bearers. This parameter activates the support of multiple EPS Bearers. FALSE FALSE 3.3 SRVCC（eSRVCC）设置
o 基站要关闭VoLTE Call，SRVCC和eSRVCC从基站侧看无区别，只需要关闭actSrvccToGsm这个参数
即可。具体设置如下
LNBTS部分LNBTS：设置actSrvccToGsm=false
图3-3 SRVCC切换开关
表3-5 SRVCC切换参数列表
参数级别 参数名 Activate SRVCC to GSM Remark 参数缩写 参数意义 This parameter enables the feature SRVCC from LTE to GSM 推荐值 LNBTS actSrvccToGsm FALSE 3.4 ROHC参数
表3-6 ROHC
参数级别 参数名 Remark 参数缩写 参数意义 推荐值 LNBTS Activate PDCP robust header compression This parameter activates the actPdcpRohc usage of PDCP Robust Header FALSE Compression.