Patent ID: 8078109

Claim:
A system for operating a concurrently coordinated microwave path in a coordinated frequency pair, comprising: a first base station at a first site, the first base station comprising a transceiver portion; a second base station at a second site, the second base station comprising a transceiver portion, wherein the transceiver portion of the first base station and the transceiver portion of the second base station are configured to provide a first coordinated microwave path on a frequency pair from the first base station to the second base station using frequency division duplex (FDD) and to provide a second coordinated microwave path from the second base station to the first base station on the frequency pair using FDD such that a first frequency and a second frequency of the frequency pair operate with frequency division duplex-time division duplex (FDD-TDD) so as to cause co-channel interference; a third base station at a third site, the third base station comprising a transceiver portion, wherein the transceiver portion of the second base station and the transceiver portion of the third base station are configured provide a third coordinated microwave path on the frequency pair from the third base station to the second base station using FDD and to provide a fourth coordinated microwave path from the second base station to the third base station on the frequency pair using FDD such that the first frequency and the second frequency of the frequency pair operate with frequency division duplex-time division duplex (FDD-TDD) so as to cause co-channel interference; and a fourth site, the fourth site located in an optimized area defined by and including the union of a first coordination area of the first base station, a second coordination area of the second base station and a third coordination area of the third base station, the optimized area being subject to the co-channel interference created by transmitting from the first base station, the second base station and the third base station as a result of which no foreign transceiver can operate on a different coordinated microwave path on the first frequency or the second frequency in the optimized area without being subjected to or causing interference greater than a permissible level, the fourth site comprising a transceiver portion, the transceiver portion of the fourth site configured to transmit to a side lobe portion of the transceiver portion of the first site or the second site on a concurrently coordinated microwave path on the first frequency using time division multiplexing such that interference caused by the transceiver portion of the fourth site to other transceivers that operate on a different coordinated microwave path on the first frequency is less than interference caused by the transceiver portion of the third site to the other transceivers.