March 2006
Beginner
216 pages
6h 56m
English
Content preview from Cellular Communications Explained
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broadcasts general information such as powe r control parameters, access methods and
operational modes, network parameters, etc., required to set up calls.
Packet Paging Channel (PPCH). This is a downlink-only channel, and is used to alert the
mobile to an incoming call and to warn it to be ready to receive data. It is used for control
signalling prior to the call set-up. Once the call is in progress, a dedicated channel referred
to as the PACCH takes over.
Packet Access Grant Channel (PAGCH). This is also a downlink channel, and it sends
information telling the mobile which traffic channel has been assigned to it. It occurs after
the PPCH has informed the mobile that there is an incoming call.
Packet Notification Channel (PNCH). This is an other ...
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