March 2006
Beginner
216 pages
6h 56m
English
Content preview from Cellular Communications Explained
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Above this are the Radio Link Control (RLC) and the Medium Access Control (MAC) layers.
These org anize the logical links between the mobile and the base station. They control the
radio link access and organize the logical channels that route the data to and from the mobile.
There is also the Logical Link Layer (LLC), which formats the data frames and is used to link the
elements of the core network to the mobile.
GPRS mobiles
In view of the increased capabilities that GPRS offers, the mobiles that are available are classified
according to their capabilities in terms of both the ability to connect to GSM and GPRS facilities,
and also the data rates they support. In the first instance, they are classified into three classes to
describe the way in
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