GPRS Advanced System TechniqueGPRS Advanced System Technique
GPRS Advanced System Technique
GPRS Advanced System Technique
GPRS Advanced System Technique
GPRS Advanced System Technique
GPRS Advanced System Technique
Figure 2-4
GPRS Advanced System Technique
GPRS Advanced System Technique
GPRS Advanced System Technique
Figure 4 -3
GPRS Advanced System Technique
than one PDCH
Figure 4 -4
GPRS Advanced System Technique
The open Gb interface connects the PCU with the SGSN
Figure 5 -1
GPRS Advanced System Technique
GPRS Advanced System Technique
GPRS Advanced System Technique
Position of the NS within the Gb interface protocol stack
Figure 5 -4
GPRS Advanced System Technique
Figure 5 -5
GPRS Advanced System Technique
Figure 5 -6
intermediate transmission network
BSS
SGSN
GPRS Advanced System Technique
Figure 5 -7
GPRS Advanced System Technique
SGSN - HLR
SGSN- MSC/VLR
GPRS Advanced System Technique
Figure 6-2
GPRS Advanced System Technique
Figure 6 -3
GPRS Advanced System Technique
Figure 6 -4
10Base-T Ethernet
100BaseTX Ethernet
GPRS Advanced System Technique
Figure 6-6
Signaling Interface
GPRS Advanced System Technique
GPRS Advanced System Technique
 
SNN
TID
GPRS Advanced System Technique
Figure 6 -9
GPRS Advanced System Technique
GPRS Advanced System Technique
GPRS Advanced System Technique
1. The MS initiates the attach procedure by the transmission of an Attach Request message to the SGSN. The Attach Request message contains information about the MS.
2. If no MM context for the MS exists anywhere in the network, authentication is mandatory. The optional Selective Authentication may also apply, and e.g. maximum number of attaches reached. If P-TMSI allocation is going to be done, and if the optional ciphering is supported by the network, ciphering mode is entered.
3. If the MS has changed SGSN since the GPRS detach, or if it is the very first attach, the SGSN informs the HLR of the updated location. The HLR informs the old SGSN if the MS has changed SGSN.
4. The SGSN selects Radio Priority SMS, and sends an Attach Accept message to the MS. P-TMSI is included if the SGSN allocates a new P-TMSI.
5. If P-TMSI was changed, the MS acknowledges the received TMSI(s) with Attach Complete.
LZU 108 5931 Uen Rev PA1
LZU 108 5931 Uen Rev PA1
GPRS Advanced System Technique
LZU 108 5931 Uen Rev PA1
GPRS Advanced System Technique
LZU 108 5931 Uen Rev PA1
GPRS Advanced System Technique
2. Security Functions
Conditional or optional communication
GPRS Advanced System Technique
1. The MS sends an Activate PDP Context Request message to the SGSN. The message contains information for the IP address allocation and of the requested Quality of Service.
2. Security functions may be executed.
3. The SGSN validates the Activate PDP Context Request using the information provided by the MS and the PDP context subscription records.
4. If the validation was successful, the SGSN sends an Activate PDP Context Accept message to the MS.
LZU 108 5931 Uen Rev PA1
LZU 108 5931 Uen Rev PA1
GPRS Advanced System Technique
Figure 7-5
2. Security Functions
GPRS Advanced System Technique
Figure 7-6
Compulsory communication
GPRS Advanced System Technique
1. The SGSN sends a Delete PDP Context Request message to the GGSN. The GGSN removes the PDP context and returns a Delete PDP Context Response message to the SGSN. If the MS was using a dynamic PDP address, then the GGSN releases this PDP address and makes it available for subsequent activation by other MSs.
2. The SGSN sends a Deactivate PDP Context Request message to the MS. The MS removes the PDP context and returns a Deactivate PDP Context Accept message to the SGSN.
LZU 108 5931 Uen Rev PA1
LZU 108 5931 Uen Rev PA1
GPRS Advanced System Technique
Figure 7-7
GPRS Advanced System Technique
GPRS Advanced System Technique
GPRS Advanced System Technique
GPRS Advanced System Technique
GPRS Advanced System Technique
Figure 7-12
GPRS Advanced System Technique
Inter-SGSN RA Update Procedure
end-to-end NS-VC