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Method and apparatus for reducing inter-cell interference

  • US 9,559,798 B2
  • Filed: 10/23/2013
  • Issued: 01/31/2017
  • Est. Priority Date: 10/25/2012
  • Status: Active Grant
First Claim
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1. A method for reducing interferences in a wireless communication network comprising a plurality of wireless cells, the method comprising steps of:

  • (a) identifying one or more of the plurality of wireless cells which experience more interference than a remainder of the plurality of wireless cells;

    (b) identifying at least one group of allocated radio resources for transmission to or from the one or more identified wireless cells, wherein transmissions made while utilizing the at least one identified group of allocated radio resources are characterized as being subjected to more interference than concurrent transmissions made while utilizing other groups of allocated radio resources for transmission to or from the one or more identified wireless cells;

    (c) for each of the at least one identified group of allocated radio resources, identifying two or more user equipments (UEs) utilizing that group of allocated radio resources and determining whether a location of at least one of the UEs is at an edge of a wireless cell at which the at least one of the UEs is provided with communication services;

    (d) selecting one pair of UEs from among the identified two or more UEs, wherein a current location of one member of the one pair of UEs is at an edge of a first wireless cell associated with the one member and a current location of another member of the one pair of UEs is either;

    i) located at a second wireless cell which is currently not included in a neighbors'"'"' list of the first wireless cell, orii) located at a second wireless cell which is adjacent to the first wireless cell, as long as the other UE member is located away from an edge of the second wireless cell, which is located adjacent to an edge of the first wireless cell;

    (dl) for a selected pair of UEs in which another UE member is located at a second wireless cell currently not included of a neighbors'"'"' list of the first wireless cell, including the second wireless cell in the neighbors'"'"' list of the first wireless cell;

    (d2) for a selected pair of UEs in which another UE member is located at a second wireless cell adjacent to the first wireless cell but away from an edge of the second wireless cell, which is adjacent to an edge of the first wireless cell, falsely defining the other member as being a UE located at the edge of the second wireless cell, which is adjacent to an edge of the first wireless cell; and

    (e) invoking an Inter-cell interference coordination procedure involving the selected pair of UEs, to reduce inter-cell interferences.

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