MS BCCH . , .
MS:
1. MS .
2. MS RACH , .
3. , LA MS ( MS)
( IDLE) MS 4 :
PLMN (PLMN selection)
(Cell Selection)
(Cell Reselection)
(Location updating).
. 7.3 IDLE
PLMN
MS PLMN PLMN. MS . MS , PLMN (registered PLMN). MS . , MS PLMN , . , .
PLMN, SIM- , . MS PLMN. PLMN , MS . , , - PLMN. (location updating). MS , MS . , MS , MS LA, PLMN, .
MS PLMN ( ), PLMN, MS PLMN. PLMN :
1. PLMN ;
2. - PLMN, SIM- ;
3. PLMN -85 dBm;
4. PLMN .
, PLMN , MS PLMN. PLMN, MS PLMN. PLMN . , PLMN , PLMN. , PLMN , MS.
|
|
|
(Cell Selection)
, .
:
Stored list selection. , BCCH BA (BCCH Allocation list). .
Normal cell selection. . , BA .
. (Normal cell selection)
normal cell selection MS .
. 7.4
:
PLMN.
. ( , MS IDLE, MS ( ), );
.
LA,
.
MS IDLE 1. : 1>0.
:
7.1
| RXLEV | MS BTS (downlink). . |
| ACCMIN | MS, MS (downlink). . |
| CCHPWR | , MS, (uplink). . |
| P | , MS, . |
dBm.
(Cell Reselection)
(Cell reselection measurements)
, , MS . , .
MS BCCH , BA, BCCH , . 5 . BA.
, BCCH, 30 . , MS , 5 , BCCH. , . BCCH , . , , , , BA.
|
|
|
MS BSIC , ( 30 ) , . BSIC :
BSIC=NCC+BCC
NCC - National Color Code ( );
BCC - Base Station Color Code ( ).
BSIC, MS , BCCH . PLMN, , .
(Cell reselection criteria)
. Locating . , , MS IDLE. , , , , . CRO, TO, PT, BCCH . , MS , offset, . BCCH .
2. 2.
2
, 
.
CRO, TO PT RLSBC (BSC)
CRO Cell Reselection Offset , [dB];
TO Temporary Offset. , [dB];
PT Penalty Time. .
T ;
2 , GSM 2. 2.
MS C1, C2 . , MS .
, MS :
.
MS , downlink .
1 (1<0) 5 , , MS .
2 5 ;
MS ( ).
