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Introduction to GSM Book
Introduction to GSM Book
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Discontinuous Reception (DRx) Discontinuous Reception (DRx)
Discontinuous reception (DRx) is a process of turning off a radio receiver when it does not expect to receive incoming messages. For DRx to operate, the system must coordinate with the mobile radio for the grouping of messages. The mobile radio (or pager) will wake up during scheduled periods to look for its messages. This reduces the power consumption which extends battery life. This is sometimes called: sleep mode.
Discontinuous Reception (DRx) Discontinuous Reception (DRx) Sleep Mode Operation
Discontinuous Reception (DRx) Sleep Mode Operation

This shows how paging groups can be used to provide for discontinuous reception capability. This diagram shows that the paging channels can be divided into 200 msec groups and that paging groups are typically associated with the last digit of the mobile devices telephone number. This provides for 10 groups with a typical maximum delay of 2 seconds.
Physical Channels, Logical Channels, Network Functions, and Operation Introduction to GSM Books
Introduction to GSM Book
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 Introduction to GSM
This book explains the basic components, technologies used, and operation of GSM systems. This book starts with the system components and basic services that the GSM system can provide. You will learn that the key types of GSM devices include single mode and dual mode mobile telephones, wireless PCMCIA cards, embedded radio modules, and external radio modems. You will then discover the different types of available services such as multiple types of voice services, data services, group call, and messaging services.

$19.99 Printed, $16.99 eBook
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