Telecommunications – Radiotelephone system – Zoned or cellular telephone system
Patent
1997-08-20
2000-02-29
Trost, William G.
Telecommunications
Radiotelephone system
Zoned or cellular telephone system
455 62, 455 671, 455 673, H04Q 734
Patent
active
060320451
ABSTRACT:
An automatic frequency assignment method, which is capable of assigning optimum frequencies to radio ports even when the radio ports are adjacent with a shield therebetween, is provides. A plurality of radio ports around a radio port to be assigned with a frequency to sequentially transmit signals at an assignment candidate frequency. A radio port already using the same frequency as the candidate frequency measures the received signal power of these signals, and compares them with a threshold. If the result of comparison reveals that there is no radio port receiving received signal power exceeding the threshold, the assignment candidate frequency is assigned. If there is a radio port receiving the received signal power exceeding the threshold, the candidate frequency is excluded from assignment candidate frequencies. This locates a radio port covered by a shielding object, so that the same frequency is prevented from being assigned to adjacent radio ports.
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Motorola, Inc., Automatic Port Frequency Assignment, JTC (AIR)/ 95.06.08-033R3, pp. 313-315, Annex C, Jun. 8, 1995.
NEC Corporation
Trost William G.
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