Packet Cell Change from GSM to WCDMA
|
Step |
Direction |
Message |
Channel |
Comments |
|
1 |
UE <--> NW |
< Packet Call in GSM/GPRS > |
|
|
|
2 |
UE <-- NW |
PACCH |
GSM_GRR_CONTROL_REQ |
|
|
3 |
UE <--> NW |
< PRACH/RRC Connection Setup in WCDMA > |
||
|
4 |
UE <--> NW |
< Complete Attach to WCDMA > |
||
|
5 |
UE <--> NW |
< Radio Bearer Setup but no PDP Activation might be required since it would use PDP established in GSM > |
||
|
6 |
UE <--> NW |
< Packet Traffic > |
|
GSM RLC/MAC: PACKET_CELL_CHANGE_ORDER (Downlink)
DLT: 147, Payload: gsm_rlcmac_dl (Radio Link Control, Medium Access Control, 3GPP TS44.060)
GSM RLC/MAC: PACKET_CELL_CHANGE_ORDER (1) (Downlink)
01.. .... = Payload Type (DL): RLC/MAC block contains an RLC/MAC control block that does not include the optional octets of the RLC/MAC control header (1)
..00 .... = RRBP: Reserved Block: (N+13) mod 2715648 (0)
.... 1... = S/P: RRBP field is valid
.... .000 = USF: 0
PACKET_CELL_CHANGE_ORDER (1) (downlink)
0000 01.. = MESSAGE_TYPE (DL): PACKET_CELL_CHANGE_ORDER (1)
.... ..00 = PAGE_MODE: Normal Paging (0)
ID
10.. .... Choice: PacketCellChangeOrderID (2)
PacketCellChangeOrderID
..11 0000 0000 0000 0000 0000 0010 0000 00.. .... = TLLI: 3221225600
..1. .... Union:UnionType
u.Target_Cell_3G
...0 0... 0x00
.... .1.. = IMMEDIATE_REL: 1
.... ..1. Exist_FDD_Description
FDD_Target_Cell
.... ...1 0011 0010 0100 0... = FDD_ARFCN: 9800
.... .0.. = DIVERSITY: 0
.... ..0. Exist_Bandwith_FDD
.... ...0 0000 1001 = SCRAMBLING_CODE: 9
0... .... Exist_TDD_Description
.0.. .... Exist_AdditionsR5
Padding Bits
..10 1011 0010 1011 0010 1011 0010 1011 Padding
0010 1011 0010 1011 0010 1011 0010 1011 Padding
0010 1011 0010 1011 0010 1011 0010 1011 Padding
0010 1011 Padding
HEX : 48 04 B0 00 00 20 27 32 40 09 2B 2B 2B 2B 2B 2B 2B 2B 2B 2B 2B 2B 2B
Packet Cell Change from WCDMA to GSM
|
Step |
Direction |
Message |
Channel |
Comments |
|
1 |
UE <--> NW |
< Packet Call in WCDMA > |
|
|
|
2 |
UE <-- NW |
DCCH |
|
|
|
3 |
UE <--> NW |
< Channel Request/Immediate Assignment in GSM > |
||
|
4 |
UE <--> NW |
< Complete Attach to GSM > |
||
|
5 |
UE <--> NW |
< PDP Activation might be required since it would use PDP established in WCDMA > |
||
|
6 |
UE <--> NW |
< Packet Traffic > |
|
DLT: 147, Payload: rrc.dl.dcch (Radio Resource Control (RRC) protocol)
DL-DCCH-Message
integrityCheckInfo
messageAuthenticationCode: d7297f3a
rrc-MessageSequenceNumber: 2
message: cellChangeOrderFromUTRAN (2)
cellChangeOrderFromUTRAN: r3 (0)
r3
cellChangeOrderFromUTRAN-IEs
rrc-TransactionIdentifier: 0
interRAT-TargetCellDescription
technologySpecificInfo: gsm (0)
gsm
bsic
ncc: 0
bcc: 1
frequency-band: dcs1800BandUsed (0)
bcch-ARFCN: 1
ncMode: 00 [bit length 3, 5 LSB pad bits, 000. .... decimal value 0]
HEX : EB 94 BF 9D 10 80 10 40 08