Section: 6.1.3.2.1a Successful Secondary PDP Context Activation Procedure Requested by the network
Content: In order to request a PDP context activation with the same PDP address and APN as an already active PDP context, the network shall send a REQUEST SECONDARY PDP CONTEXT ACTIVATION message to the MS and start timer T3385. The message contains the required QoS, Linked TI, and optionally protocol configuration options and a TFT. The network shall always include a TFT in the REQUEST SECONDARY PDP CONTEXT ACTIVATION message. If present, the TFT shall be sent transparently through the SGSN to the MS to enable packet classification and policing for uplink and downlink data transfer. The network shall allocate packet filter identifiers for all packet filters included in the TFT. NOTE: A network implementing an earlier release of this specification can send a REQUEST SECONDARY PDP CONTEXT ACTIVATION message without any TFT. Upon receipt of a REQUEST SECONDARY PDP CONTEXT ACTIVATION message, if the MS sent an APN for the establishment of the PDN connection, the MS shall stop the timer T3396 if it is running for the APN sent by the MS. If the MS did not send an APN for the establishment of the PDN connection and the request type was different from "emergency", the MS shall stop the timer T3396 associated with no APN if it is running. If the REQUEST SECONDARY PDP CONTEXT ACTIVATION message was received for an emergency PDN connection, the UE shall not stop the timer T3396 associated with no APN if it is running. For any case, the MS shall then either initiate the secondary PDP context activation procedure as described in the subclause 6.1.3.2.1 or shall reject the activation request by sending a REQUEST SECONDARY PDP CONTEXT ACTIVATION REJECT message as described in subclause 6.1.3.2.2a. The value of the reject cause IE of the REQUEST SECONDARY PDP CONTEXT ACTIVATION REJECT message shall indicate the reason for rejection, e.g. "insufficient resources to activate another context". The MS shall maintain the previously negotiated Bearer Control Mode (BCM) for all active PDP contexts sharing the same PDP Address and APN and ignore any BCM parameter, if included in the REQUEST SECONDARY PDP CONTEXT ACTIVATION message. If the previously negotiated BCM is 'MS only', the MS should reject the PDP context activation (see subclause 6.1.3.2.2a). The ACTIVATE SECONDARY PDP CONTEXT REQUEST message sent by the MS in order to initiate the secondary PDP context activation procedure shall contain the QoS and Linked TI required in the REQUEST SECONDARY PDP CONTEXT ACTIVATION message. The MS shall also include a TFT with packet filters as specified in the REQUEST SECONDARY PDP CONTEXT ACTIVATION message. Upon receipt of the ACTIVATE SECONDARY PDP CONTEXT REQUEST message, the network shall stop timer T3385. The same procedures then apply as described for MS initiated secondary PDP context activation.