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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.
As the GPRS standard is an extension of GSM capabilities, the service operates on the 2G and 3G cellular communication GSM frequencies. [10] [12] GPRS devices can typically use (one or more) of the frequencies within one of the frequency bands the radio supports (850, 900, 1800, 1900 MHz). Depending on the device, location and intended use ...
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).
Peripheral Interchange Program (PIP) was a utility to transfer files on and between devices on Digital Equipment Corporation's computers. It was first implemented on the PDP-6 architecture by Harrison "Dit" Morse early in the 1960s. It was subsequently implemented for DEC's operating systems for PDP-10, PDP-11, and PDP-8 [1] architectures.
The HLR will set a flag against the destination account, indicating that it is unavailable for short message delivery, and store the SMSC's address in the Message Waiting Data (MWD) list for the destination party. Valid flags are Mobile Not Reachable Flag (MNRF), Memory Capacity Exceeded Flag (MCEF) and Mobile Not Reachable for GPRS (MNRG).
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.
The 18 address lines allow the addressing of a maximum of 256 KB. Typically, the top 8 KB is reserved for the registers of the memory-mapped I/O devices used in the PDP-11 architecture. The design deliberately minimizes the amount of redundant logic required in the system.