March 2006
Beginner
216 pages
6h 56m
English
Content preview from Cellular Communications Explained
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latency required for packet access. It offers a 20-ms 9.6-kbps channel, and in addition to this
there are new 5- and 10-ms frames that offer data rates of 19.2 and 38.4 kbps, respectively.
In operation, this channel is controlled by a closed-loop power control system.
5. Reverse Dedicated Control Channel (R-DCCH) . This is similar to the F-DCCH, and is used to
carry signalling and user information in a call. The channel is only present if there are data to
be transmitted.
6. Reverse Fundamental Channel (R-FCH). This is the channel in the reverse link that is used
to carry the voice and data pa yload. It allows for either 5- or 20-ms frames; the shorter
frames are used to give lower latency (i.e. the phone gets the data it needs in 5 ms rather
than ...
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