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When a subscriber requests a PDP context, the SGSN will send a create PDP context request GTP-C message to the GGSN giving details of the subscriber's request. The GGSN will then respond with a create PDP context response GTP-C message which will either give details of the PDP context actually activated or will indicate a failure and give a ...
One PDP context may have several (secondary) PDP contexts and NSAPI. The NSAPI is an integer value within the PDP context header. In the UMTS system the data connection between a GPRS Core Network and a mobile station is identified using an NSAPI, that identifies as well a radio access bearer.
GPRS Tunnelling Protocol is the defining IP-based protocol of the GPRS core network. Primarily it is the protocol which allows end users of a GSM or WCDMA network to move from place to place while continuing to connect to the Internet as if from one location at the Gateway GPRS support node (GGSN).
It performs the multiple PDP Context PDU transfers and it also ensures that NPDUs from each PDP Context are transmitted to the LLC layer in sufficient time to maintain the QoS. SNDCP provides services to the higher layers which may include connectionless and connection-oriented mode, compression, multiplexing and segmentation.
Networks and mobile devices with GPRS started to roll out around the year 2001. [2] At the time of introduction it offered for the first time [ b ] seamless mobile data transmission using packet data for an "always-on" connection (eliminating the need to "dial-up"), [ 3 ] providing improved Internet access for web , email , WAP services, and ...
System Architecture Evolution (SAE) is the core network architecture of mobile communications protocol group 3GPP's LTE wireless communication standard.. SAE is the evolution of the GPRS Core Network, but with a simplified architecture; an all-IP Network (AIPN); support for higher throughput and lower latency radio access networks (RANs); and support for, and mobility between, multiple ...
The GMSC, on receipt of this Short Message, needs to discover the location of the B-Party in order to be able to correctly deliver the text to the recipient (the term Gateway MSC, in this context, indicating an MSC that is obtaining routing information from the Home Location Register (HLR)). To do this, the GMSC invokes the MAP service package ...
Devices while registered to the network, may not have a data session (PDP Context in the GSM world) established. A separate IP->MSISDN table has to be maintained in Connection Oriented Push. Typically, the PPG or another part of the gateway has to receive RADIUS or other accounting packets in order to support Connection Oriented Push.