Mitigation of interference between communication terminals in TD-LTE
First Claim
Patent Images
1. A method for communication, comprising:
- communicating between one or more first base stations and first wireless communication terminals using a first alternating pattern of downlink time intervals and uplink time intervals;
selecting a time offset between the first alternating pattern and a second alternating pattern that is used by one or more second base stations for communicating with second wireless communication terminals, so as to minimize impact of interference between the first and second wireless communication terminals; and
synchronizing the first base stations relative to the second base stations according to the selected time offset,wherein each of the first and second alternating patterns comprises one or more uplink sub-frames, one or more downlink sub-frames, and one or more special sub-frames containing respective uplink and downlink regions, and comprising applying an interference mitigation process to reduce the interference during the special sub-frames, andwherein applying the interference mitigation process comprises distinguishing between a first subset of the special sub-frames that are subjected to the interference and a second subset of the special sub-frames that are not subjected to the interference, and performing at least one of;
processing only the special sub-frames in the second subset; and
activating the interference mitigation process only during the special sub-frames in the first subset.
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Abstract
A method for communication includes communicating between one or more first base stations (28A) and first wireless communication terminals (32A) using a first alternating pattern (56) of downlink time intervals and uplink time intervals. A time offset is selected between the first alternating pattern and a second alternating pattern (60), which is used by one or more second base stations (28B) for communicating with second wireless communication terminals (32B), so as to minimize impact of interference between the first and second wireless communication terminals. The first base stations are synchronized relative to the second base stations according to the selected time offset.
56 Citations
16 Claims
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1. A method for communication, comprising:
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communicating between one or more first base stations and first wireless communication terminals using a first alternating pattern of downlink time intervals and uplink time intervals; selecting a time offset between the first alternating pattern and a second alternating pattern that is used by one or more second base stations for communicating with second wireless communication terminals, so as to minimize impact of interference between the first and second wireless communication terminals; and synchronizing the first base stations relative to the second base stations according to the selected time offset, wherein each of the first and second alternating patterns comprises one or more uplink sub-frames, one or more downlink sub-frames, and one or more special sub-frames containing respective uplink and downlink regions, and comprising applying an interference mitigation process to reduce the interference during the special sub-frames, and wherein applying the interference mitigation process comprises distinguishing between a first subset of the special sub-frames that are subjected to the interference and a second subset of the special sub-frames that are not subjected to the interference, and performing at least one of; processing only the special sub-frames in the second subset; and activating the interference mitigation process only during the special sub-frames in the first subset. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A wireless communication terminal, comprising:
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a transceiver, which is configured to communicate with a first base station using a first alternating pattern of downlink time intervals and uplink time intervals, wherein the first alternating pattern is synchronized relative to a second alternating pattern that is used by a second base station for communicating with at least another wireless communication terminal while applying between the first and second patterns a time offset selected so as to minimize impact of interference between the terminal and the other terminal; and a processor, which is configured to apply an interference mitigation process for reducing residual interference caused by the second pattern, wherein each of the first and second alternating patterns comprises one or more uplink sub-frames, one or more downlink sub-frames, and one or more special sub-frames containing respective uplink and downlink regions, and wherein the processor is configured to apply the interference mitigation process during the special sub-frames, to distinguish between a first subset of the special sub-frames that are subjected to the interference and a second subset of the special sub-frames that are not subjected to the interference, and to perform at least one of; processing only the special sub-frames in the second subset; and activating the interference mitigation process only during the special sub-frames in the first subset. - View Dependent Claims (11, 12, 13, 14, 15, 16)
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Specification