Radio calling method and apparatus for removing near-far problem

Details Radio calling method and apparatus for removing near-far problem Radio calling method and apparatus for removing near-far problem

1996-06-17

1997-12-23

Eisenzopf, Reinhard J.

Telecommunications

Transmitter and receiver at separate stations

455 342, 455 541, 455 561, 379 61, H04Q 738

Patent

active

057015872

ABSTRACT:
A radio calling method and apparatus for removing a near-far problem in a radio switching system groups a plurality of cordless fixed parts distributed in various areas into at least two groups. If a cordless portable part attempts an outgoing call, a channel is scanned by the cordless fixed part, a received field strength is compared with a communication field strength. If the received field strength is more than the communication field strength, the received field strength is stored and a determination is made as to whether or not link-request data has been received during a given period of time. If the link-request data has been received during the given period of time, a determination is made as to whether or not the received field strength is more than a near-far field strength and if received field strength is more than the near-far field strength, a link-grant is transmitted to the cordless portable part. If the received field strength is less than the near-far field strength, a received cordless portable part ID is compared with a cordless portable part ID of link-request data which has been previously received and stored in a memory, and a count in a corresponding counter is increased when the received cordless portable part ID is equal to the cordless portable part ID of the link-request data. The increased count in the counter with a predetermined count the predefined counter, and a link-grant is transmitted to the cordless portable part when the increased count is more than the predetermined count.

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