Performing coordinated multipoint transmission and reception (CoMP) in a wireless communication network
First Claim
1. A method performed by a network node configured for operation in a wireless communication network:
- obtaining received signal strength values for each user equipment among a plurality of user equipments, with respect to each antenna among a plurality of antennas associated with two or more access nodes to be used as a cooperating cell group for Coordinated Multi-Point (CoMP) data transmissions to the user equipments, wherein at least one of the access nodes includes two or more antennas available for use in the CoMP data transmissions;
calculating antenna relationship values for each user equipment with respect to the plurality of antennas, based on the received signal strength values;
identifying which ones of the plurality of antennas are most important for each user equipment, based on the antenna relationship values calculated for the user equipment;
arranging the plurality of user equipments into two or more groups, so that the user equipments in each group have one or more important antennas in common; and
associating subsets of the plurality of antennas with the groups, such that each group is allocated one or more of the antennas identified as being important for the user equipments in the group and such that the CoMP data transmissions to the user equipments in each group use only the associated subset of antennas; and
coordinating the CoMP data transmissions to the plurality of user equipments from the cooperating cell set based on scheduling the groups of user equipments separately and scheduling the user equipments in each group together.
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Abstract
The present invention relates to the field of coordinated multipoint transmission and reception (CoMP) in wireless communication networks, in particular to methods, an apparatus, and a network node for use in performing coordinated data transmissions in a wireless communication network. A method for use in a network node for coordinating data transmission to user equipments in a wireless communication network, wherein the wireless communication network comprising at least two access nodes each access node having one or more antennas and being arranged to perform coordinated data transmissions to user equipments is provided. The method comprising: obtaining signal strength values associated with the one or more antennas of the at least two access nodes for a number of user equipments; arranging the number of user equipments into one or more groups of user equipments and associating each of the one or more groups of user equipments with a sub-set of the one or more antennas of the at least two access nodes based on the obtained signal strength values; and coordinating data transmission performed by the at least two access nodes to each of the one or more groups of user equipments based on the subset of the one or more antennas of the at least two access nodes associated with each group of user equipments, respectively.
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Citations
20 Claims
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1. A method performed by a network node configured for operation in a wireless communication network:
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obtaining received signal strength values for each user equipment among a plurality of user equipments, with respect to each antenna among a plurality of antennas associated with two or more access nodes to be used as a cooperating cell group for Coordinated Multi-Point (CoMP) data transmissions to the user equipments, wherein at least one of the access nodes includes two or more antennas available for use in the CoMP data transmissions; calculating antenna relationship values for each user equipment with respect to the plurality of antennas, based on the received signal strength values; identifying which ones of the plurality of antennas are most important for each user equipment, based on the antenna relationship values calculated for the user equipment; arranging the plurality of user equipments into two or more groups, so that the user equipments in each group have one or more important antennas in common; and associating subsets of the plurality of antennas with the groups, such that each group is allocated one or more of the antennas identified as being important for the user equipments in the group and such that the CoMP data transmissions to the user equipments in each group use only the associated subset of antennas; and coordinating the CoMP data transmissions to the plurality of user equipments from the cooperating cell set based on scheduling the groups of user equipments separately and scheduling the user equipments in each group together. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. An apparatus configured for operation in a network node that is configured for operation in a wireless communication network, said apparatus comprising:
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a communication interface configured to obtain received signal strength values for each user equipment among a plurality of user equipments, with respect to each antenna among a plurality of antennas associated with two or more access nodes to be used as a cooperating cell group for Coordinated Multi-Point (CoMP) data transmissions to the user equipments, wherein at least one of the access nodes includes two or more antennas available for use in the CoMP data transmissions; and a processing circuit that is configured to; calculate antenna relationship values for each user equipment with respect to the plurality of antennas, based on the received signal strength values; identify which ones of the plurality of antennas are most important for each user equipment, based on the antenna relationship values calculated for the user equipment; arrange the plurality of user equipments into two or more groups, such that the user equipments in each group have one or more important antennas in common; and associate subsets of the plurality of antennas with each groups, such that each group is allocated one or more of the antennas identified as being important for the user equipments in the group and such that the CoMP data transmissions to the user equipments in each group use only the associated subset of antennas; and coordinate the CoMP data transmissions to the plurality of user equipments from the cooperating cell set based on scheduling the groups of user equipments separately and scheduling the user equipments in each group together. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification