March 2006
Beginner
216 pages
6h 56m
English
Content preview from Cellular Communications Explained
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phones being used, the calls being made and the prevailing conditions. It is quite possible that one
slot may be supporting a GSM call, the next a GPRS data connection and the third an EDGE
connection using 8PSK.
Table 6.2 provides a comparison of GPRS and EDGE data payloads.
Data coding and throughput
Most of the data being sent over an EDGE link consist of TCP/IP packets. These packets are
longer than a single EDGE packet payload, and therefore it is necessary to split the TCP/IP
packets into smaller sections known as ‘chunks’. These chunks have defined sizes, and may
consist of one of 22, 28, 34 or 37 bytes or ‘octets’. The 37-octet chunk may be ...
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