Multiple user MIMO interference suppression communications system and methods
First Claim
Patent Images
1. An apparatus, comprising:
- at least one processor; and
memory including computer program code;
the computer program code configured to, with the at least one processor and the memory, cause the apparatus to perform at least the following;
determine information related to transmit pre-coding for a plurality of communication devices coupled to the apparatus using shared radio resources in over the air communications;
provide an assigned communication resource for transmission of the determined information related to transmit pre-coding to the plurality of communication devices;
format said information related to transmit pre-coding as data for transmission to said communication device employing said assigned communication resource; and
determine that the information related to transmit pre-coding may be provided as a subset of pre-coding matrix indices corresponding to entries found within a codebook resident within the plurality of communication devices or may be provided as indices of pre-coded dedicated reference symbol sets associated to different spatial streams.
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Abstract
Messages containing interference vectors are transmitted efficiently to user equipments over a downlink channel. A pre-coding indicator channel is used for transmission in an over-the-air packet-based communication system. A table of pre-coding matrix indices or pre-coding vector information is transmitted to user equipments configured in a spatially multiplexed multiple user MIMO configuration. The UEs receive the pre-coding vector information that allows them to determine the pre-coding vectors used to communicate in the downlink direction from a MIMO base station to other MIMO UEs in the cell or system. The UEs use this information to actively suppress inter-user interference.
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Citations
18 Claims
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1. An apparatus, comprising:
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at least one processor; and memory including computer program code; the computer program code configured to, with the at least one processor and the memory, cause the apparatus to perform at least the following; determine information related to transmit pre-coding for a plurality of communication devices coupled to the apparatus using shared radio resources in over the air communications; provide an assigned communication resource for transmission of the determined information related to transmit pre-coding to the plurality of communication devices; format said information related to transmit pre-coding as data for transmission to said communication device employing said assigned communication resource; and determine that the information related to transmit pre-coding may be provided as a subset of pre-coding matrix indices corresponding to entries found within a codebook resident within the plurality of communication devices or may be provided as indices of pre-coded dedicated reference symbol sets associated to different spatial streams. - View Dependent Claims (2, 3, 4, 5)
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6. A computer program product comprising a program code stored in a computer readable medium which, when executed by an apparatus including a programmable processor and a memory, is configured to cause the apparatus to:
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determine information related to transmit pre-coding for a plurality of communication devices coupled to the apparatus using shared radio resources in over the air communications; provide an assigned communication resource for transmission of the information related to transmit pre-coding to the plurality of communication devices; format the information related to transmit pre-coding as data for transmission to the plurality of communications devices employing the assigned communication resource; and determine that the information related to transmit pre-coding may be provided as a subset of pre-coding matrix indices corresponding to entries found within a codebook resident within the plurality of communication devices or may be provided as indices of pre-coded dedicated reference symbol sets associated to different spatial streams.
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7. A method, comprising:
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determining information related to transmit pre-coding for a plurality of communication devices using shared radio resources in over the air communications; providing an assigned communication resource for transmission of the information related to transmit pre-coding as data to the plurality of communication devices; formatting the information related to transmit pre-coding as data for transmission to the plurality of communication devices employing the assigned communication resource; and determining the information related to transmit pre-coding as a subset of pre-coding matrix indices corresponding to entries in a predetermined pre-coding information table or as indices of pre-coded dedicated reference symbol sets associated to different spatial streams. - View Dependent Claims (8, 9)
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10. An apparatus comprising:
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at least one processor; and memory including computer program code; the memory and the computer program code configured, with the at least one processor, to cause the apparatus to perform at least the following; receive a communication containing information related to transmit pre-coding over a pre-assigned communication resource, and decode data indicating the information related to transmit pre-coding for at least one other communications device using a shared radio resource for over the air communications wherein the information related to transmit pre-coding is determined as a subset of pre-coding matrix indices corresponding to entries in a predetermined pre-coding information table, or as indices of pre-coded dedicated reference symbol sets associated to different spatial streams. - View Dependent Claims (11, 12, 13, 14)
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15. A method, comprising:
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receiving a communication containing information related to transmit pre-coding over a pre-assigned communications resource; and decoding data from the communication indicating information related to transmit pre-coding for at least one other communications device using a shared radio resource, wherein the information related to transmit pre-coding is determined as a subset of pre-coding matrix indices corresponding to entries in a predetermined pre-coding information table, or as indices of pre-coded dedicated reference symbol sets associated to different spatial streams. - View Dependent Claims (16, 17, 18)
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Specification