Patent ID: 7929468
Filing Date: 2011-04-19
Classification: H04B,H04L,H04W

Abstract:
1. A method for reducing interference between at least two interfering radio networks, each comprising a plurality of radio entities, wherein at least one of the radio networks is operative in frequency division duplex (FDD) mode and at least one of the other radio networks is operative in a time division duplex (TDD) mode, said method comprising: for each of said at least of the radio networks operative in the FDD mode and said at least one of the radio networks operative in the TDD mode, identifying respective the radio entities for which interferences should be reduced, and wherein for each of the at least two networks, the respective radio entities are of a pre-defined type; defining a time pattern composed of time slots on each of the interfered FDD and TDD frequency channels, said time pattern comprising receive time intervals for the respective radio entities of the pre-defined types that are likely to be interfered while receiving communications transmitted thereto; aligning said defined time patterns for each of FDD frequency channel and a TDD frequency channel interfering therewith so that said receive time intervals for at least two of the respective radio entities of the pre-defined types that are potentially exposed to interferences, overlap each other; defining at least two types of time intervals within said time pattern on each of the FDD and TDD frequency channels, wherein a first type of time intervals is adapted to enable at least one of the radio entities to receive communications with substantially reduced interference and wherein a second type of time intervals is adapted for exchanging communications without mitigating interferences induced by at least one other of the radio entities transmitting during said time intervals, wherein at least one radio entity that might create interference to at least one of the radio entities of the pre-defined type associated with the at least one other radio network, is prevented from transmitting any communications that might create substantial interference to said at least one radio entity associated with the at least one other radio network, and wherein communications transmitted to at least some of the radio entities of the pre-defined types that might experience interference from others of the radio entities of the at least one other network are scheduled at intervals of the first type.