Category: Mobility Management
Combined Attach procedure in GPRS
‘Combined Attach’ means the MS is making an attach to the CS and PS domains in the same time. And this will save the radio resources of the network. This […]
Gs interface – SGSN/MSC association in GPRS
The Gs interface is the interface between the SGSN, and the MSC/VLR. In other words, it is the interface between the PS domain and the CS domain. When you switch […]
Paging procedure in GPRS
The network inanities ‘Paging procedure’ towards to the MS, in order to move the MM context from STANDBY to READY in 2G, or from PMM-IDLE to PMM-CONNECTED in 3G. Paging […]
Service Request in 3G
The MS initiates the ‘Service Request’ procedure in order to establish the ‘PS signaling connection’ between the MS and the SGSN. The MS do this in order to move the […]
GPRS Detach procedure
There are three nodes that can initiate ‘GPRS Detach’ procedure. Those nodes are the MS, the SGSN, and the HLR. There are two types of Detach, ‘Explicit Detach’, and ‘Implicit […]
Timers in GPRS Mobility Management
There are a few Mobility Management timers exist on the MS and the SGSN. Using those timers the nodes will be able to properly manage the states of the MM […]
How MM state transition in 2G occurs
The MM context exist on both the MS and the SGSN. One of the information elements exist inside the MM context, is the ‘MM state’ the MS currently exist in. Below […]
PMM state transition in 3G
The PMM state are the Mobility management state for the MM context exist on the MS and on the SGSN after the ‘GPRS attach’ procedure completed. Please take into consideration […]
What is Mobility Management states in GPRS
The GPRS Mobility Management determines if the user equipment is registered to the network or not. In another words, it defines if the network knows about the presence of the […]
Routing Area Update ‘RAU’ in GPRS
Types of Routing Area Update ‘RAU’ Intra-SGSN RAU The Intra SGSN RAU occurs when the MS moves from one RA to another RA, and both RAs exist under the same […]