GPRS for Mobile Internet
This book helps you understand how the GPRS system is used as a major technology building block for the emerging mobile Internet; the book
also provides you with detailed coverage of a wide range of important topics.
TABLE OF CONTENTS GPRS for Mobile Internet
5.4: Listening to MS Paging Blocks
5.4 Listening to MS Paging Blocks
If it needs to send GPRS data toward a given MS, the network analyzes the MS GMM state in order to decide whether it may or not initiate a paging procedure. When the MS is in GMM STANDBY state, the network does not know accurately the GPRS MS location. In fact, if the mobile camps on a new cell in (packet) idle mode within the same RA, it does not notify the network of a cell change in GMM STANDBY state. The paging procedure allows for the location of an MS within a whole RA by sending a paging message in all cells belonging to this MS's RA. When the MS detects a paging that is intended for it while it is in GMM STANDBY state, it answers by sending any LLC frame and changes into GMM READY state. Upon receipt of an LLC frame sent as a paging response, the network is able to send a resource assignment command for a downlink TBF.
| Note | The network does not need to initiate a paging procedure if the MS is in GMM READY state because in this state the MS notifies the network of each cell change in a given RA. Therefore, the network is able to send directly a resource assignment command for a downlink TBF toward an MS in GMM READY state. |
5.4.1 Network Operating Modes
Table 5.9 summarizes the MS behavior for the reception of paging messages for circuit and GPRS services...
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