2. LTE Area
(1) Tracking Area
(a) TA (Tracking Area)
- A TA includes one or several E-UTRAN cells.
- The network allocates a list with one or more TAs to the UE.
- In certain operation modes, the UE may move freely in all TAs of the list without updating the Mobility Management Entity (MME).
-> 특정 오퍼레이션 모드에서,리스트에 있는 모든 TA들 내에서 MME 변경없이 UE가 자유롭게 이동할 것이다.
- The tracking area (TA) concept replaces the universal mobile telecommunications system (UMTS) routing area/location area (RA/LA)
and UMTS terrestrial radio access network registration area (URA) concepts to simplify the mobile area tracking operations and
to reduce the overhead caused by the area updates a wireless transmit/receive unit (WTRU) has to perform.
(b) TAI (Tracking Area Identity)
|
MCC |
MNC |
TAC |
|<---------- TAI --------->|
- This is the identity used to identify tracking areas.
- It is composed of a Tracking Area Code (TAC), a Mobile Network Code (MNC) and a Mobile Country Code (MCC).
- See 3GPP TS23.003 Section 19.4.2.3
(c) TAC (Tracking Area Code)
- 16 bit integer.
- See 3GPP TS23.003 Section 19.4.2.3.
(2) CSG (Closed Subscriber Group)
- A set of subscribers who are permitted to access a particular cell to which access is restricted.
- Allowed CSG list: 사업자가 미리 지정하여 특정 Home ENB에 접속 가능한 사용자 목록
- User CSG list: 사용자 자신이 특정 Home eNB에 접속 가능한 사용자 목록
- See 3GPP TS25.367 and TS36.304.