Method and apparatus for reducing inter-cell interference
First Claim
1. A method comprising:
- identifying, for a cluster of wireless cells comprising a plurality of wireless cells, a first wireless cell that is a most interfered wireless cell of the cluster of wireless cells by comparing a hybrid automatic repeat request (HARQ) success rate to a threshold value;
identifying, for a plurality of radio resources available to the first wireless cell, one or more most interfered radio resources of the plurality of radio resources;
identifying one or more user equipment (UE) associated with the one or more most interfered radio resources for the first wireless cell;
identifying at least one UE associated with the one or more most interfered radio resources for the first wireless cell as a cell edge UE based, at least in part, on at least one of a time adjustment (TA) value and a received signal strength power (RSSP) value associated with the at least one UE;
identifying at least one other UE associated with the one or more most interfered radio resources;
determining whether the at least one other UE is one of;
a cell edge UE served by a second wireless cell of the cluster of wireless cells, wherein the second wireless cell is not identified in a neighbor list of the first wireless cell;
ora cell core UE served by a second wireless cell of the cluster of wireless cells, wherein the second wireless cell is identified in a neighbor list of the first wireless cell but no inter-cell interference coordination is provided for the cell core UE,wherein the at least one other UE is determined to be a cell edge UE or a cell core UE based, at least in part, on at least one of TA value and a RSSP value associated with the at least one other UE;
including the second wireless cell in the neighbor list of the first wireless cell if the at least one other UE is determined to be a cell edge UE for the second wireless cell that is not identified in the neighbor list of the first wireless cell;
falsely identifying the at least one other UE as a cell edge UE if the at least one other UE is determined to be a cell core UE for the second wireless cell that is identified in the neighbor list of the first wireless cell;
determining if the first wireless cell remains the most interfered wireless cell of the cluster of wireless cells by comparing the hybrid automatic repeat request (HARQ) success rate of the first wireless cell to the predetermined threshold; and
issuing an error message based on the determination that the first wireless cell remains the most interfered wireless cell of the cluster of wireless cells.
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Abstract
A method is described for reducing interferences in a wireless network, by: identifying cells which experience more interference than others; identifying a group of PRBs that their transmissions are subjected to more interference than other concurrent transmissions; identifying UEs associated with the group of PRBs, and determining whether the location of the UEs is at the cells'"'"' edges; selecting a pair of UEs where one member is located at a first cell'"'"'s edge and the other is located either (i) at a second cell, not included within a neighbors'"'"' list of the first cell, or (ii) at the core or remote edge of a second cell. In case (i), the second cell is introduced to the first cell neighbors'"'"' list, and in case (ii) the other UE is falsely defined as a UE located at the near second cell'"'"'s edge. Then, ICIC procedure is invoked for that pair of UEs.
242 Citations
20 Claims
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1. A method comprising:
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identifying, for a cluster of wireless cells comprising a plurality of wireless cells, a first wireless cell that is a most interfered wireless cell of the cluster of wireless cells by comparing a hybrid automatic repeat request (HARQ) success rate to a threshold value; identifying, for a plurality of radio resources available to the first wireless cell, one or more most interfered radio resources of the plurality of radio resources; identifying one or more user equipment (UE) associated with the one or more most interfered radio resources for the first wireless cell; identifying at least one UE associated with the one or more most interfered radio resources for the first wireless cell as a cell edge UE based, at least in part, on at least one of a time adjustment (TA) value and a received signal strength power (RSSP) value associated with the at least one UE; identifying at least one other UE associated with the one or more most interfered radio resources; determining whether the at least one other UE is one of; a cell edge UE served by a second wireless cell of the cluster of wireless cells, wherein the second wireless cell is not identified in a neighbor list of the first wireless cell;
ora cell core UE served by a second wireless cell of the cluster of wireless cells, wherein the second wireless cell is identified in a neighbor list of the first wireless cell but no inter-cell interference coordination is provided for the cell core UE, wherein the at least one other UE is determined to be a cell edge UE or a cell core UE based, at least in part, on at least one of TA value and a RSSP value associated with the at least one other UE; including the second wireless cell in the neighbor list of the first wireless cell if the at least one other UE is determined to be a cell edge UE for the second wireless cell that is not identified in the neighbor list of the first wireless cell; falsely identifying the at least one other UE as a cell edge UE if the at least one other UE is determined to be a cell core UE for the second wireless cell that is identified in the neighbor list of the first wireless cell; determining if the first wireless cell remains the most interfered wireless cell of the cluster of wireless cells by comparing the hybrid automatic repeat request (HARQ) success rate of the first wireless cell to the predetermined threshold; and issuing an error message based on the determination that the first wireless cell remains the most interfered wireless cell of the cluster of wireless cells. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A controller comprising:
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a memory element for storing data; and a processor to execute instructions associated with the data that, when executed, the controller is configured to; identify, for a cluster of wireless cells comprising a plurality of wireless cells, a first wireless cell that is a most interfered wireless cell of the cluster of wireless cells by comparing a hybrid automatic repeat request (HARQ) success rate to a threshold value; identify, for a plurality of radio resources available to the first wireless cell, one or more most interfered radio resources of the plurality of radio resources; identify one or more user equipment (UE) associated with the one or more most interfered radio resources for the first wireless cell; identify at least one UE associated with the one or more most interfered radio resources for the first wireless cell as a cell edge UE based, at least in part, on at least one of a time adjustment (TA) value and a received signal strength power (RSSP) value associated with the at least one UE; identify at least one other UE associated with the one or more most interfered radio resources; determine whether the at least one other UE is one of; a cell edge UE served by a second wireless cell of the cluster of wireless cells, wherein the second wireless cell is not identified in a neighbor list of the first wireless cell;
ora cell core UE served by a second wireless cell of the cluster of wireless cells, wherein the second wireless cell is identified in a neighbor list of the first wireless cell but no inter-cell interference coordination is provided for the cell core UE, wherein the at least one other UE is determined to be a cell edge UE or a cell core UE based, at least in part, on at least one of a TA value and a RSSP value associated with the at least one other UE; include the second wireless cell in the neighbor list of the first wireless cell if the at least one other UE is determined to be a cell edge UE for the second wireless cell that is not identified in the neighbor list of the first wireless cell; falsely identify the at least one other UE as a cell edge UE if the at least one other UE is determined to be a cell core UE for the second wireless cell that is identified in the neighbor list of the first wireless cell; determine if the first wireless cell remains the most interfered wireless cell of the cluster of wireless cells by comparing the hybrid automatic repeat request (HARQ) success rate of the first wireless cell to the threshold value; and issue an error message based on the determination that the first wireless cell remains the most interfered wireless cell of the cluster of wireless cells. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification