Out-of-group interference reduction in wireless communication systems
First Claim
1. A method for use in a multiple-input multiple-output wireless communication system in which:
- a plurality of base stations are provided each of which can transmit signals to, and receive signals transmitted from, one or more user equipments;
the base stations are organized into a plurality of groups;
in a given group of base stations serving one or more user equipments, those serving base stations coordinate with each other to simultaneously transmit signals to the one or more served user equipments, and one or more of the served user equipments feed back information to one or more of those serving base stations, wherein said information incorporates inter-group noise information related to interference between different base station groups, the method comprising;
processing signals for simultaneous transmission from base stations of a group of the plurality of groups to one or more user equipments served by that group, said processing using the inter-group noise information fed back to the base station(s) of that group to improve transmission capacity, whereina noise-related parameter is defined which incorporates the inter-group noise information which, includes noise power Ĩ
0 which represents the component of the total power of the noise in the system that is associated with inter-group interference,the processing involves using the noise-related parameter to precode signals for simultaneous transmission from base stations of a group to one or more user equipments served by that group,information fed back by the one or more of the served user equipments further includes noise power Ñ
0 which represents the component of the total power of the noise in the system that is associated with background noise,the noise-related parameter, μ
, is calculated using an equation equivalent to the following;
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Accused Products
Abstract
In a MIMO wireless communication system, a plurality of base stations (BSs) are provided each of which can transmit signals to, and receive signals transmitted from, one or more user equipments (UEs). The BSs are also organized into a plurality of groups. In a given group of BSs serving one or more UEs, those serving BSs coordinate with each other to simultaneously transmit signals to the one or more served UEs, and one or more of the served UEs feed back information to one or more of those serving BSs. The fed back information incorporates inter-group noise information related to interference between different BS groups. The method involves processing signals for simultaneous transmission by BSs of a group to one or more UEs served by that group and using the information fed back to the BSs of that group to improve system performance.
16 Citations
13 Claims
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1. A method for use in a multiple-input multiple-output wireless communication system in which:
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a plurality of base stations are provided each of which can transmit signals to, and receive signals transmitted from, one or more user equipments; the base stations are organized into a plurality of groups; in a given group of base stations serving one or more user equipments, those serving base stations coordinate with each other to simultaneously transmit signals to the one or more served user equipments, and one or more of the served user equipments feed back information to one or more of those serving base stations, wherein said information incorporates inter-group noise information related to interference between different base station groups, the method comprising; processing signals for simultaneous transmission from base stations of a group of the plurality of groups to one or more user equipments served by that group, said processing using the inter-group noise information fed back to the base station(s) of that group to improve transmission capacity, wherein a noise-related parameter is defined which incorporates the inter-group noise information which, includes noise power Ĩ
0 which represents the component of the total power of the noise in the system that is associated with inter-group interference,the processing involves using the noise-related parameter to precode signals for simultaneous transmission from base stations of a group to one or more user equipments served by that group, information fed back by the one or more of the served user equipments further includes noise power Ñ
0 which represents the component of the total power of the noise in the system that is associated with background noise,the noise-related parameter, μ
, is calculated using an equation equivalent to the following; - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 13)
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11. A multiple-input multiple-output wireless communication system comprising:
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a plurality of base stations, each of which can transmit signals to, and receive signals transmitted from, one or more user equipments, wherein the base stations are organized into a plurality of groups; and in a given group of base stations serving one or more user equipments, those serving base stations coordinate with each other to simultaneously transmit signals to the one or more served user equipments, and one or more of the served user equipments feed back information to one or more of those serving base stations, said information incorporating inter-group noise information related to interference between different base station groups; wherein signals are processed for simultaneous transmission from base stations of a group to one or more user equipments served by that group and said processing uses the inter-group noise information fed back to the base station(s) of that group to improve transmission capacity, wherein a noise-related parameter is defined which incorporates the inter-group noise information which, includes noise power Ĩ
0 which represents the component of the total power of the noise in the system that is associated with inter-group interference,the processing involves using the noise-related parameter to precode signals for simultaneous transmission from base stations of a group to one or more user equipments served by that group, information fed back by the one or more of the served user equipments further includes noise power Ñ
0 which represents the component of the total power of the noise in the system that is associated with background noise,the noise-related parameter, μ
, is calculated using an equation equivalent to the following;
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12. An apparatus for use in a multiple-input multiple-output wireless communication system, the system comprising:
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a plurality of base stations, each of which can transmit signals to, and receive signals transmitted from, one or more user equipments, wherein the base stations are organized into a plurality of groups; and in a given group of base stations serving one or more user equipments, those serving base stations coordinate with each other to simultaneously transmit signals to the one or more served user equipments, and one or more of the served user equipments feed back information to one or more of those serving base stations, said information incorporating inter-group noise information related to interference between different base station groups; the apparatus comprising; a processor which processes signals for simultaneous transmission from base stations of a group to one or more user equipments served by that group and, said processing uses the inter-group noise information fed back to the base station(s) of that group to improve transmission capacity, wherein a noise-related parameter is defined which incorporates the inter-group noise information which, includes noise power Ĩ
0 which represents the component of the total power of the noise in the system that is associated with inter-group interference,the processing involves using the noise-related parameter to precode signals for simultaneous transmission from base stations of a group to one or more user equipments served by that group, information fed back by the one or more of the served user equipments further includes noise power Ñ
0 which represents the component of the total power of the noise in the system that is associated with background noise,the noise-related parameter, μ
, is calculated using an equation equivalent to the following;
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Specification