Intra cell interference mitigation in a wireless network employing relay nodes
First Claim
1. A method in a Relay Node (RN) for controlling downlink transmissions to User Equipments (UEs) being served by the RN in a wireless communications network, the method comprising:
- the RN requesting each of said UEs to measure and report to the RN a UE-specific Reference Signal Received Power (RSRP) and a UE-specific total downlink interference;
the RN measuring an RN-specific total downlink interference prior to receiving the UE-specific RSRP and the UE-specific total downlink interference reports from each of said UEs;
the RN determining which UEs are closely located to the RN, based on each of the reported UE-specific RSRP;
the RN creating a UE-list with UEs determined to be closely located to the RN and for which a difference between the measured UE-specific total downlink interference and the measured RN-specific total downlink interference does not exceed a difference threshold;
the RN determining whether the measured RN-specific total downlink interference exceeds an RN interference threshold; and
when the measured RN-specific total downlink interference exceeds the RN interference threshold, the RN controlling the downlink transmissions to the UEs in the created UE-list by independently performing at least one of the following;
suspending downlink transmissions to UEs in the UE-list for a predefined time period,decreasing output power from the RN towards UEs in the UE-list for a predefined time period, andallocating a fewer number of slots for downlink transmission from the RN to UEs in the UE-list.
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Accused Products
Abstract
A method and relay node (RN) in a wireless communications network for controlling downlink transmissions to User Equipments (UEs) being served by the RN. An RN transceiver circuit requests each UE to measure and report a Reference Signal Received Power (RSRP) and a UE total downlink interference. An RN receiver circuit receives and forwards the reported RSRP and UE total downlink interference for each UE. An RN processing and control circuit measures an RN total downlink interference; determines which UEs are closely located to the RN based on the reported RSRP of each UE; creates a UE-list with UEs determined to be closely located to the RN and which experience UE total downlink interference similar to the measured RN total downlink interference; determines whether the measured RN total downlink interference exceeds an RN interference threshold; and if so, controls the downlink transmissions to the UEs in the created UE-list.
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Citations
19 Claims
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1. A method in a Relay Node (RN) for controlling downlink transmissions to User Equipments (UEs) being served by the RN in a wireless communications network, the method comprising:
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the RN requesting each of said UEs to measure and report to the RN a UE-specific Reference Signal Received Power (RSRP) and a UE-specific total downlink interference; the RN measuring an RN-specific total downlink interference prior to receiving the UE-specific RSRP and the UE-specific total downlink interference reports from each of said UEs; the RN determining which UEs are closely located to the RN, based on each of the reported UE-specific RSRP; the RN creating a UE-list with UEs determined to be closely located to the RN and for which a difference between the measured UE-specific total downlink interference and the measured RN-specific total downlink interference does not exceed a difference threshold; the RN determining whether the measured RN-specific total downlink interference exceeds an RN interference threshold; and when the measured RN-specific total downlink interference exceeds the RN interference threshold, the RN controlling the downlink transmissions to the UEs in the created UE-list by independently performing at least one of the following; suspending downlink transmissions to UEs in the UE-list for a predefined time period, decreasing output power from the RN towards UEs in the UE-list for a predefined time period, and allocating a fewer number of slots for downlink transmission from the RN to UEs in the UE-list. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A relay node (RN) for controlling downlink transmissions to User Equipments (UEs) being served by the RN in a wireless communications network, the RN comprising:
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a transceiver circuit configured to request each of said UEs to measure and report to the RN a UE-specific Reference Signal Received Power (RSRP) and a UE-specific total downlink interference; a receiver circuit configured to receive and forward the reported UE-specific RSRP and UE-specific total downlink interference for each of said UEs; and a processing and control circuit configured to; measure an RN-specific total downlink interference prior to receiving from the receiver circuit the UE-specific RSRP and the UE-specific total downlink interference reports from each of said UEs; determine which UEs are closely located to the RN, based on the reported UE-specific RSRP of each of said UEs; create a UE-list with UEs determined to be closely located to the RN and for which a difference between the measured UE-specific total downlink interference and the measured RN-specific total downlink interference does not exceed a difference threshold; determine whether the measured RN-specific total downlink interference exceeds an RN interference threshold; and when the measured RN-specific total downlink interference exceeds the RN interference threshold, control the downlink transmissions to the UEs in the created UE-list by independently performing at least one of the following; suspending downlink transmissions to UEs in the UE-list for a predefined time period, decreasing output power from the RN towards UEs in the UE-list for a predefined time period, and allocating a fewer number of slots for downlink transmission from the RN to UEs in the UE-list. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19)
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Specification