# US 11,452,090 B2 · Performance of 5G MIMO > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,452,090 B2 - Document ID: US11452090B2 - Status: Granted - Kind: B2 - Application number: 17/459,196 - Filed: 2021-08-27 - Published: 2021-12-30 - Granted: 2022-09-20 - Earliest claimed: 2018-06-22 - Assignees: AT&T Intellectual Property I, L.P. - Applicants: AT&T Intellectual Property I, L.P. - Inventors: SaiRamesh Nammi; Salam Akoum; Arunabha Ghosh - Web page: https://patentgrep.com/patent/US11452090B2 ## CPC - H04W 72/23: in the downlink direction of a wireless link, i.e. towards a terminal - H04B 7/0413: MIMO systems - H04B 7/0486: {taking channel rank into account} - H04B 7/0626: {Channel coefficients, e.g. channel state information [CSI]} - H04B 7/0697: {using spatial multiplexing} - H04W 84/042: {Public Land Mobile systems, e.g. cellular systems} - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) - H04B: TRANSMISSION ## Abstract A base station device can transmit data via multiple data channels to a single user equipment device. Each of the multiple data channels can be configured and scheduled via respective downlink control channels to the user equipment device. In an embodiment, the first data channel can be mapped to multiple layers, with a modulation and coding scheme (MCS) assigned based on the average channel quality indicator (CQI) of the layers. One or more of the layers can have a higher CQI however, capable of supporting an additional transmission. The base station device can then facilitate establishing a second data channel to the layer with the higher CQI. The MCS assigned to the second data traffic channel can be based on the CQI of the layer, or based on a difference between the average CQI of the layers and the CQI of the layer. ## Claims ### Claim 1 A transmitter device, comprising: a processor; and a memory that stores executable instructions that, when executed by the processor, facilitate performance of operations, comprising: determining a first group of layers available for a downlink transmission to a user equipment; establishing a first data channel between the transmitter device and the user equipment, wherein the first data channel only uses a layer of the first group of layers that has a highest signal to noise ratio of the first group of layers; and establishing, concurrent with the first data channel, a second data channel between the transmitter device and the user equipment comprising: in response to determining that a first subgroup of the first group of layers that comprises the layer achieves a higher data rate between the transmitter device and the user equipment for the first group of layers than a second subgroup of the first group of layers that does not comprise the layer, selecting the first subgroup for use in the second data channel, and in response to determining that the second subgroup achieves the higher data rate between the transmitter device and the user equipment for the first group of layers than the first subgroup, selecting the second subgroup for use in the second data channel. ### Claim 2 (depends on 1) The transmitter device of claim 1, wherein the operations further comprise employing different modulation and coding schemes for the first data channel and the second data channel. ### Claim 3 (depends on 1) The transmitter device of claim 1, wherein the operations further comprise sending an indication to the user equipment that the first data channel only employs the layer. ### Claim 4 (depends on 1) The transmitter device of claim 1, wherein the operations further comprise, in response to determining that the first subgroup achieves the higher data rate than the second subgroup, sending an indication to the user equipment that the second data channel employs the first subgroup. ### Claim 5 (depends on 1) The transmitter device of claim 1, wherein the operations further comprise, in response to determining that the second subgroup achieves the higher data rate than the first subgroup, sending an indication to the user equipment that the second data channel employs the second subgroup. ### Claim 6 (depends on 1) The transmitter device of claim 1, wherein the first subgroup comprise all layers of the first group of layers. ### Claim 7 (depends on 1) The transmitter device of claim 1, wherein the operations further comprise: transmitting, to the user equipment, first data via the first data channel and second data via the second data channel. ### Claim 8 A method, comprising: receiving, by a base station comprising a processor, information indicating a first group of layers available for a downlink transmission to a user equipment; facilitating, by the base station, establishing a first data channel between the base station and the user equipment, wherein the first data channel only uses a layer of the first group of layers that has a highest signal to noise ratio of the first group of layers; and facilitating, by the base station, establishing, concurrent with the first data channel, a second data channel between the base station and the user equipment comprising: in response to determining that a first subgroup of the first group of layers that comprises the layer achieves a higher data rate between the base station and the user equipment for the first group of layers than a second subgroup of the first group of layers that does not comprise the layer, selecting the first subgroup for the second data channel, and in response to determining that the second subgroup achieves the higher data rate between the base station and the user equipment for the first group of layers than the first subgroup, selecting the second subgroup for the second data channel. ### Claim 9 (depends on 8) The method of claim 8, further comprising employing, by the base station, different modulation and coding schemes for the first data channel and the second data channel. ### Claim 10 (depends on 8) The method of claim 8, further comprising sending, by the base station, a mapping to the user equipment indicating that the first data channel only employs the layer. ### Claim 11 (depends on 8) The method of claim 8, further comprising, in response to determining that the first subgroup achieves the higher data rate than the second subgroup, sending, by the base station, a mapping to the user equipment indicating that the second data channel employs the first subgroup. ### Claim 12 (depends on 8) The method of claim 8, further comprising, in response to determining that the second subgroup achieves the higher data rate than the first subgroup, sending, by the base station, a mapping to the user equipment indicating that the second data channel employs the second subgroup. ### Claim 13 (depends on 8) The method of claim 8, wherein the first subgroup comprise all layers of the first group of layers. ### Claim 14 (depends on 8) The method of claim 8, further comprising sending, by the base station to the user equipment, first data via the first data channel and second data via the second data channel. ### Claim 15 A non-transitory machine-readable medium, comprising executable instructions that, when executed by a processor of network equipment, facilitate performance of operations, comprising: identifying a first group of layers available for a downlink transmission to a user equipment; establishing a first data channel between the network equipment and the user equipment, wherein the first data channel only uses a layer of the first group of layers that has a highest signal to noise ratio of the first group of layers; and establishing, concurrent with the first data channel, a second data channel between the network equipment and the user equipment comprising: in response to determining that a first subset of the first group of layers that comprises the layer achieves a higher data rate between the network equipment and the user equipment for the first group of layers than a second subset of the first group of layers that does not comprise the layer, selecting the first subset for use with the second data channel, and in response to determining that the second subset achieves the higher data rate between the network equipment and the user equipment for the first group of layers than the first subset, selecting the second subset for with in the second data channel. ### Claim 16 (depends on 15) The non-transitory machine-readable medium of claim 15, wherein the operations further comprise employing different modulation and coding schemes for the first data channel and the second data channel. ### Claim 17 (depends on 15) The non-transitory machine-readable medium of claim 15, wherein the operations further comprise communicating an indication to the user equipment that the first data channel only employs the layer. ### Claim 18 (depends on 15) The non-transitory machine-readable medium of claim 15, wherein the operations further comprise, in response to determining that the first subset achieves the higher data rate than the second subset, communicating an indication to the user equipment that the second data channel employs the first subset. ### Claim 19 (depends on 15) The non-transitory machine-readable medium of claim 15, wherein the operations further comprise, in response to determining that the second subset achieves the higher data rate than the first subset, providing an indication to the user equipment that the second data channel employs the second subset. ### Claim 20 (depends on 15) The non-transitory machine-readable medium of claim 15, wherein the first subset comprise all layers of the first group of layers.