Telecommunications – Transmitter and receiver at separate stations
Patent
1992-02-27
1994-06-07
Eisenzopf, Reinhard J.
Telecommunications
Transmitter and receiver at separate stations
379 60, 455 341, 455 542, 455 561, 455137, H04B 726, H04Q 702
Patent
active
053197950
ABSTRACT:
In a cellular mobile communication system, each base station is allocated common frequencies shared with other base stations in addition to unique frequencies. One of the unique frequencies is assigned by a base station to a mobile terminal in response to a call request. The field strength of a signal from that mobile terminal is detected and one of the common frequencies is assigned to it if the detected field strength becomes lower than a threshold. The base station receives a field strength signal from a neighboring station indicating the field strength of a version of the signal at the neighboring station and compares it with a threshold, and combines the signal of that mobile terminal with the version of the signal received by and relayed from the neighboring station when the field strength of that version of the signal is higher than the threshold. At the given mobile station, a signal from the base station which assigned the common frequency is combined with a signal from the neighboring station. In a modification, the field strength of signals from surrounding base stations is detected by mobile terminals and a start-of-diversity-mode request is transmitted when the field strength of one of the surrounding stations is higher than a threshold and an end-of-diversity-mode request signal is transmitted when the field strength of such a surrounding station is lower than the threshold. The base station responds to these requests for effecting diversity reception.
REFERENCES:
patent: 5109390 (1992-04-01), Gilhousen et al.
patent: 5175867 (1992-12-01), Wejke et al.
Furuya Yukitsuna
Hamabe Kojiro
Kanai Toshihito
Taketsugu Masanori
Eisenzopf Reinhard J.
NEC Corporation
Pham Chi
LandOfFree
Cellular mobile communications system using frequencies commonly does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Cellular mobile communications system using frequencies commonly, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Cellular mobile communications system using frequencies commonly will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-801270