# US 11,452,111 B2 · Multi-antenna transmission protocols for high doppler conditions > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,452,111 B2 - Document ID: US11452111B2 - Status: Granted - Kind: B2 - Application number: 17/196,830 - Filed: 2021-03-09 - Published: 2021-09-16 - Granted: 2022-09-20 - Earliest claimed: 2017-05-05 - Assignees: AT&T Intellectual Property I, L.P. - Applicants: AT&T Intellectual Property I, L.P. - Inventors: SaiRamesh Nammi; Arunabha Ghosh - Web page: https://patentgrep.com/patent/US11452111B2 ## CPC - H04W 72/542: using measured or perceived quality - H04B 7/0417: Feedback systems - H04B 7/0482: {Adaptive codebooks} - H04B 7/0486: {taking channel rank into account} - H04B 7/0626: {Channel coefficients, e.g. channel state information [CSI]} - H04B 7/0632: {Channel quality parameters, e.g. channel quality indicator [CQI]} - H04B 7/0639: {Using selective indices, e.g. of a codebook, e.g. pre-distortion matrix index [PMI] or for beam selection} - H04L 5/0057: {Physical resource allocation for CQI} - H04W 72/21: in the uplink direction of a wireless link, i.e. towards the network - H04W 72/0466: {the resource being a scrambling code} - H04W 72/51: based on terminal or device properties - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) - H04B: TRANSMISSION - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) ## Abstract In response to a metric (e.g., Doppler metric) exceeding a threshold, a network node device can facilitate transmitting a message instructing a user equipment to enable reception of transmission signals having a precoding rank value of one. The network node device can send a reference signal having the precoding rank value of one, and receive feedback from the user equipment comprising an indicator of channel quality. Optionally, in response to the metric exceeding a threshold, the network node device can facilitate transmitting a message instructing the user equipment to respond to a reference signal by providing feedback comprising a first indicator of rank having a value of one, and a second indicator of channel quality. ## Claims ### Claim 1 Network node equipment, comprising: a processor; and a memory that stores executable instructions that, when executed by the processor, facilitate performance of operations, comprising: in response to a metric representative of a Doppler shift related to frequencies of transmissions between the network node equipment and a user equipment being determined to exceed a threshold, transmitting a message instructing the user equipment to exclude, from channel state information feedback, reporting of a rank indicator representative of a number of different data streams transmitted between the network node equipment and the user equipment; receiving, from the user equipment, the channel state information feedback, wherein the channel state information feedback excludes the rank indicator; and based on the channel state information feedback, determining a transmission scheduling parameter related to a transmission protocol for further transmissions from the network node equipment to the user equipment. ### Claim 2 (depends on 1) The network node equipment of claim 1, wherein the operations further comprise transmitting, to the user equipment, traffic data based on the transmission protocol. ### Claim 3 (depends on 1) The network node equipment of claim 1, wherein the operations further comprise: obtaining speed measurements of the user equipment at multiple times, and wherein the metric comprises an average of the speed measurements. ### Claim 4 (depends on 1) The network node equipment of claim 1, wherein the operations further comprise: determining a rate of change of a characteristic of an uplink channel from the user equipment to the network node equipment. ### Claim 5 (depends on 1) The network node equipment of claim 1, wherein the operations further comprise: determining a rate of change of channel quality information of previous transmissions from the network node equipment to the user equipment, the previous transmissions occurring prior to determining the metric. ### Claim 6 (depends on 1) The network node equipment of claim 1, wherein the transmission scheduling parameter comprises a modulation and coding parameter applicable to modulating and coding of data streams for the further transmissions. ### Claim 7 (depends on 1) The network node equipment of claim 1, wherein the channel state information feedback comprises an indicator of channel quality, and the message instructing the user equipment further comprises an instruction to exclude, from the channel state information feedback, a precoding matrix indicator used to select a precoding matrix for the further transmissions. ### Claim 8 A method, comprising: determining, by network equipment comprising a processor, a metric representative of a Doppler shift related to frequencies of transmissions between the network equipment and a user equipment; in response to the metric being determined to exceed a threshold, facilitating, by the network equipment, transmitting a message instructing the user equipment to exclude, from a channel state information feedback, a rank indicator representative of a number of different data streams transmitted between the network equipment and the user equipment; facilitating, by the network equipment, receiving the channel state information feedback from the user equipment, wherein the channel state information feedback does not comprise the rank indicator; and based on the channel state information feedback, determining, by the network equipment, a transmission scheduling parameter related to a transmission protocol applicable to further transmissions between the user equipment and the network equipment. ### Claim 9 (depends on 8) The method of claim 8, further comprising: facilitating, by the network equipment, transmitting traffic data to the user equipment based on the transmission protocol. ### Claim 10 (depends on 8) The method of claim 8, wherein determining the metric comprises obtaining speed measurements of the user equipment at different times, and wherein the metric comprises a mean or a median of the speed measurements. ### Claim 11 (depends on 8) The method of claim 8, wherein determining the metric comprises determining a rate of change of a characteristic of an uplink channel from the user equipment to the network equipment. ### Claim 12 (depends on 8) The method of claim 8, wherein determining the metric comprises determining a rate of change of channel quality information of the further transmissions. ### Claim 13 (depends on 8) The method of claim 8, further comprising: facilitating, by the network equipment, transmitting the transmission scheduling parameter to the user equipment. ### Claim 14 (depends on 8) The method of claim 8, wherein the message instructing the user equipment further comprises an instruction to exclude, from the channel state information feedback, a channel state information indicator used to select a precoding matrix for the further transmissions. ### Claim 15 A non-transitory machine-readable medium, comprising executable instructions that, when executed by a processor of a network node, facilitate performance of operations, comprising: determining a metric representative of a Doppler shift related to frequencies of transmissions between the network node and a user equipment; in response to the metric exceeding a threshold, transmitting a message instructing the user equipment to exclude a rank indicator from channel state information feedback; receiving, from the user equipment, the channel state information feedback, wherein the channel state information feedback does not comprise the rank indicator; and based on the channel state information feedback, determining a transmission scheduling parameter related to a transmission protocol for further transmissions from the network node to the user equipment. ### Claim 16 (depends on 15) The non-transitory machine-readable medium of claim 15, wherein the operations further comprise: transmitting, to the user equipment, traffic data based on the transmission protocol. ### Claim 17 (depends on 15) The non-transitory machine-readable medium of claim 15, wherein determining the metric comprises obtaining speed measurements of the user equipment at multiple times, and wherein the metric comprises an average of the speed measurements. ### Claim 18 (depends on 15) The non-transitory machine-readable medium of claim 15, wherein the operations further comprise: transmitting, to the user equipment, the transmission scheduling parameter. ### Claim 19 (depends on 15) The non-transitory machine-readable medium of claim 15, wherein the operations further comprise: determining a rate of change of channel quality information of previous transmissions from the network node to the user equipment, the previous transmissions occurring prior to determining the metric. ### Claim 20 (depends on 15) The non-transitory machine-readable medium of claim 15, wherein the message instructing the user equipment further comprises an instruction to exclude from the channel state information feedback a precoding matrix indicator used to select a precoding matrix for the further transmissions.