Telecommunications – Transmitter and receiver at separate stations
Patent
1994-12-15
1997-02-25
Pham, Chi H.
Telecommunications
Transmitter and receiver at separate stations
455 331, 455 541, 455 62, 455 671, H04B 726
Patent
active
056067275
ABSTRACT:
Each of base stations 2 is positioned in a radio zone composed of three sectors and has a base station controller 3. The base station controller 3 measures upstream interference signal levels in all directions with receiving sector antennas 11, 13, 15 or omnidirectional antenna 17, determines candidate channels for assignment to the mobile stations 18, indicates the candidate channels to the mobile stations 18, instructs each of the mobile stations 18 to measure and report downstream interference signal levels to the base station controller 3, and then determines channels to be assigned. When determining candidate channels for assignment to the mobile stations 18, the base station controller 3 rearranges candidate channels into an order of an ascending order of upstream interference signal levels based on the measured upstream interference signal levels, and assigns candidate channels to groups of mobile stations 18.
REFERENCES:
patent: 5093924 (1992-03-01), Toshiyuki et al.
patent: 5418839 (1995-05-01), Knuth et al.
"Personal Digital Cellular Telecommunications System, RCR Standard-27 B," Research and Development Center for Radio Systems (RCR), pp. 208; 235; 325-328.
NEC Corporation
Pham Chi H.
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