Combined tala updating with imsi attach
Combined tala updating with imsi attach - Reallife cam sexso
If the MS is known to the SGSN, i.e., the SGSN has not changed since the MS was last attached to the network, then step 3 is not required. If this MS is unknown to the serving SGSN, the SGSN takes additional steps to get the IMSI from the old SGSN. If the SGSN has changed since the MS was last attached to the network, the new serving SGSN initiates the update location procedure with the HLR. The HLR sends a cancel location to the old SGSN and sends subscription data to the new SGSN by sending an insert subscriber data message. In the case of GPRS attach failure, one of the following errors is returned in the attach reject message.In case the old SGSN failed to provide the IMSI, the new SGSN requests the MS to provide the IMSI. Once the IMSI is known, the serving SGSN initiates the authentication procedure by sending an authentication and ciphering request’ to the MS. ■ Illegal MS ■ GPRS service not allowed ■ GPRS and non-GPRS services not allowed ■ PLMN not allowed ■ Location area not allowed ■ Roaming not allowed in this location area ■ GPRS services not allowed in the PLMN ■ No suitable cells in location area The Gs interface between the SGSN and the MSC/VLR is not a mandatory interface.
The MS and the SGSN contexts hold no valid location or routing information for the subscriber. The GPRS MS is not reachable, as paging is not possible.
The MS can activate PDP context only after a successful attach. Figures 4-11 and Figure 4-12 show the steps for the GPRS attach procedure. The MS sends the attach request message to the serving SGSN.
The key parameters are: ■ IMSI or P-TMSI ■ Routing area identifier (RAI) ■ Cipher key sequence number ■ Attach type ■ DRX 2. The MS acknowledges by sending an attach complete message.
The transition to the IDLE state happens when the MS implicit detach from the network occurs or the SGSN receives a MAP cancel location from the HLR. The mobile station must perform a GPRS attach in order to be known to the network and move to the READY state.
Following the successful GPRS attach, an MM context is said to be active at the MS and the SGSN.
However such supports are optional for LTE network deployment.
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The MS uses this procedure to inform the network that it does not want GPRS services anymore.
The SGSN or the HLR initiates a detach procedure to inform the MS that GPRS services are no more accessible to the MS.
The MS can send or receive PDP PDUs and activate and deactivate PDP contexts.
The MS makes the transition to the STANDBY state if no data transmission occurs for a settable timer period.
The LTE network supports combined attach, combined detach and combined TAU procedure Here are small information about “Combined Attach” Introduction: Generally both UE and Network are backward compatible that means UE can perform combined attach/detach for LTE and legacy GPRS/UMTS network.