Method and circuit arrangement for the access of cordless terminals to a telecommunications system
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United States of America Patent
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Aug 31, 1999
Issued Date -
N/A
app pub date -
Feb 21, 1997
filing date -
Mar 24, 1994
priority date (Note) -
Expired
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Abstract
The essential functions and characteristics of a telecommunications system with cordless terminals are established by the known DECT standard. On the one hand, the invention has the task of reducing the cost of ADPCM/PCM transcoders in DECT or DECT-like systems, and on the other to improve the handover characteristics, by making an interruption-free channel changeover, even during a change of cell bundles. To that effect, all DECT interface circuits (9, 10) are jointly controlled by a central processing unit (MOB CPU) assigned only to these DECT interface circuits (9, 10). The otherwise usual ADPCM/PCM transcoders have been omitted in the DECT interface circuits (9, 10), and are now assigned to the central processing unit (MOB CPU), while their number can be reduced in comparison to known solutions. The central processing unit (MOB CPU) also takes over the switching functions for the channels offered by the DECT interface circuits (9, 10). Since the channels from different DECT interface circuits (9, 10) are in frame-synchronous form, the central processing unit (MOB CPU) can carry out an interruption-free channel change during the cell bundle change of a cordless terminal.
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