LTE中“一个小区属于一个TA还是一个TA list.
在LTE中引入了TA list的概念,请问LTE中“一个小区属于一个TA还是一个TA list.”, 如回答中有规范列证最好。
第一,TAC概念类似于2G3G的LAC和RAC,也就是每个cell隶属于某个特定TAC,这个没有疑义,cell中通过SIB1将cellid和TAC广播给cell内驻留的终端:
SystemInformationBlockType1 message
-- ASN1START
SystemInformationBlockType1 ::= SEQUENCE {
cellAccessRelatedInfo SEQUENCE {
plmn-IdentityList PLMN-IdentityList,
trackingAreaCode TrackingAreaCode,
cellIdentity CellIdentity,
cellBarred ENUMERATED {barred, notBarred},
intraFreqReselection ENUMERATED {allowed, notAllowed},
第二,系统对TAC的使用上和LAC/RAC有所不同,就是所谓的TAlist的概念,终端attach后所遍历的所有TA都要记录入TA-list,这样寻呼终端是按照TAlist为目标进行。
Tracking area identity list
The purpose of the Tracking area identity list information element is to transfer a list of tracking areas from the network to the UE.The coding of the information element allows combining different types of lists. The lists of type "000" and "001" allow a more compact encoding, when the different TAIs are sharing the PLMN identity.
TAlist吧!
这个问题是你对TA 和TAlist的概念没搞清楚
TA是一个跟踪区有保函多个小区,而TAlist是保函多个TA
这个是LTE中为了减少重选而提出来的技术