# US 11,121,814 B2 · Techniques of CSI feedback with unequal error protection messages > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,121,814 B2 - Document ID: US11121814B2 - Status: Granted - Kind: B2 - Application number: 16/654,201 - Filed: 2019-10-16 - Published: 2020-02-13 - Granted: 2021-09-14 - Earliest claimed: 2017-01-09 - Assignees: Mediatek Inc. - Applicants: Mediatek Inc. - Inventors: Lung-Sheng Tsai; Weidong Yang - Web page: https://patentgrep.com/patent/US11121814B2 ## CPC - H04L 1/0073: {Special arrangements for feedback channel} - H03M 13/13: Linear codes - H03M 13/136: {Reed-Muller [RM] codes} - H03M 13/356: {Unequal error protection [UEP]} - H04B 7/0478: {Special codebook structures directed to feedback optimisation} - H04B 7/0479: {for multi-dimensional arrays, e.g. horizontal or vertical pre-distortion matrix index [PMI]} - H04B 7/0626: {Channel coefficients, e.g. channel state information [CSI]} - H04B 7/0652: {Feedback error handling} - H04L 1/0013: {Rate matching, e.g. puncturing or repetition of code symbols} - H04L 1/007: {Unequal error protection (for format H04L1/0078; for codes per se H03M13/35)} - H04L 5/0057: {Physical resource allocation for CQI} - H04L 5/0064: {Rate requirement of the data, e.g. scalable bandwidth, data priority} - H04L 27/3488: {Multiresolution systems} - H04B 7/0417: Feedback systems - H04L 1/1812: Hybrid protocols; Hybrid automatic repeat request [HARQ] - Y02D 30/70: in wireless communication networks - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) - H03M: CODING; DECODING; CODE CONVERSION IN GENERAL (using fluidic means F15C4/00; optical analogue/digital converters G02F7/00; coding, decoding or code conversion, specially adapted for particular applications, see the relevant subclasses, e.g. G01D, G01R, G06F, G06T, G09G, G10L, G11B, G11C, H04B, H04L, H04M, H04N; ciphering or deciphering for cryptography or other purposes involving the need for secrecy G09C) - H04B: TRANSMISSION - Y02D: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE ## Abstract In an aspect of the disclosure, a method, a computer-readable medium, and an apparatus are provided. The apparatus may be a UE. The UE determines priority levels of a plurality of messages based on at least one predetermined rule. The plurality of messages contain channel state information to be reported to a base station. The at least one predetermined rule specifies that a message including an indicator indicating at least one of a beam selection at a particular dimension and an orthogonal beam group selection has a priority level higher than a priority level of a message including an indicator indicating at least one of a beam direction from a group of beam candidates or co-phasing between two sets of antennas for two polarizations. The UE sends, to the base station, one or more messages of the plurality of messages based on the priority levels of the plurality of messages. ## Claims ### Claim 1 A method of wireless communication of a user equipment (UE), comprising: determining priority levels of a plurality of messages based on at least one predetermined rule, wherein the plurality of messages contain channel state information to be reported to a base station, wherein the at least one predetermined rule specifies that a message including an indicator indicating at least one of a beam selection at a particular dimension and an orthogonal beam group selection has a priority level higher than a priority level of a message including an indicator indicating at least one of a beam direction from a group of beam candidates or co-phasing between two sets of antennas for two polarizations; and sending, to the base station, one or more messages of the plurality of messages based on the priority levels of the plurality of messages. ### Claim 2 (depends on 1) The method of claim 1, wherein the at least one predetermined rule specifies that a message including a wide-band component of the channel state information has a priority level higher than a priority level of a message including a sub-band component of the channel state information. ### Claim 3 (depends on 1) The method of claim 1, wherein the at least one predetermined rule specifies that a message including a rank indication has a priority level higher than a priority level of a message including a channel quality indicator. ### Claim 4 (depends on 1) The method of claim 1, wherein the at least one predetermined rule specifies that a message including a rank indication has a priority level higher than a priority level of a message including a precoding matrix indicator. ### Claim 5 (depends on 1) The method of claim 1, wherein the at least one predetermined rule specifies that a message including a precoding matrix indicator has a priority level higher than a priority level of a message including a channel quality indicator. ### Claim 6 A method of wireless communication of a user equipment (UE), comprising: determining priority levels of a plurality of messages based on at least one predetermined rule, wherein the plurality of messages contain channel state information to be reported to a base station, wherein the at least one predetermined rule specifies that, for reporting channel state information of a plurality of sub-band channels, all messages carrying channel state information of odd indexed sub-band channels of the plurality of sub-band channels have priority levels higher or lower than priority levels of all messages carrying channel state information of even indexed sub-band channels of the plurality of sub-band channels; selecting one or more messages from the plurality of messages based on priority levels of the plurality of messages; and sending the selected one or more messages to the base station. ### Claim 7 A method of wireless communication of a user equipment (UE), comprising: determining that a priority level of a first message is higher than a priority level of a second message based on at least one predetermined rule, wherein the first message and the second message contain channel state information to be reported to a base station; and mapping information bits of the first message to a first plurality of input bits of an encoder and information bits of the second message to a second plurality of input bits of the encoder, wherein, when the encoder is a Polar-code encoder, a reliability of at least one input bit of the first plurality of input bits is higher than a reliability of at least one input bit of the second plurality of input bits, and the reliability of the at least one input bit of the first plurality of input bits and the reliability of the at least one input bit of the second plurality of input bits are each defined by a correct rate or a log likelihood ratio (LLR) of a respective input bit. ### Claim 8 (depends on 7) The method of claim 7, further comprising: encoding, at the encoder, the first plurality of input bits and the second plurality of input bits to generate encoded bits; and transmitting the encoded bits to the base station. ### Claim 9 (depends on 8) The method of claim 8, further comprising: generating data bits representing the channel state information, wherein the information bits of the first message include a first group of data bits of the generated data bits and protection bits derived from the first group of data bits, wherein the information bits of the second message include a second group of data bits of the generated data bits. ### Claim 10 (depends on 7) The method of claim 7, wherein, when the encoder is a Reed-Muller encoder, the first plurality of input bits are carried by a first set of basis vectors, wherein the second plurality of input bits are carried by a second set of basis vectors, wherein and a minimum Euclidean distance of any basis vector in the first set of basis vectors with respect to the other basis vectors in the first set of basis vectors is greater than or equal to a minimum Euclidean distance of any basis vector in the second set of basis vectors with respect to the other basis vectors in the second set of basis vectors. ### Claim 11 (depends on 7) The method of claim 7, wherein, when the encoder is a super-position coding encoder, the first plurality of input bits are a predetermined number of most significant bits of one or more symbols, and the second plurality of input bits are among the other bits of the one or more symbols. ### Claim 12 (depends on 7) The method of claim 7, wherein the at least one predetermined rule specifies that a message including a wide-band component of the channel state information has a priority level higher than a priority level of a message including a sub-band component of the channel state information. ### Claim 13 (depends on 7) The method of claim 7, wherein the at least one predetermined rule specifies that a message including a rank indication has a priority level higher than a priority level of a message including a channel quality indicator. ### Claim 14 (depends on 7) The method of claim 7, wherein the at least one predetermined rule specifies that a message including a rank indication has a priority level higher than a priority level of a message including a precoding matrix indicator, wherein the at least one predetermined rule further specifies that a message including a precoding matrix indicator has a priority level higher than a priority level of a message including a channel quality indicator. ### Claim 15 (depends on 7) The method of claim 7, wherein the at least one predetermined rule specifies that a message including a precoding matrix indicator has a priority level higher than a priority level of a message including a channel quality indicator. ### Claim 16 (depends on 7) The method of claim 7, wherein the at least one predetermined rule specifies that a message including an indicator indicating at least one of a beam selection at a particular dimension and an orthogonal beam group selection has a priority level higher than a priority level of a message including an indicator indicating at least one of a beam direction from a group of beam candidates or co-phasing between two sets of antennas for two polarizations. ### Claim 17 (depends on 7) The method of claim 7, wherein the at least one predetermined rule specifies that a message including an indicator indicating a number of beams for a linear combination has a priority level higher than a priority level of a message including an indicator indicating an index for a strongest coefficient per layer. ### Claim 18 (depends on 7) The method of claim 7, wherein the at least one predetermined rule specifies that a priority level of a message including an indicator indicating an index for a strongest coefficient per layer has a priority level higher than a priority level of a message including an indicator indicating a wide-band amplitude. ### Claim 19 (depends on 7) The method of claim 7, wherein the at least one predetermined rule specifies that, for reporting a plurality of bits representing amplitudes, priority levels of messages carrying the plurality of bits descend from a message carrying a most significant bit of the plurality of bits to a message carrying a least significant bit of the plurality of bits. ### Claim 20 (depends on 7) The method of claim 7, wherein the at least one predetermined rule specifies that, for reporting channel state information of a plurality of sub-band channels, all messages carrying channel state information of odd indexed sub-band channels of the plurality of sub-band channels have priority levels higher or lower than priority levels of all messages carrying channel state information of even indexed sub-band channels of the plurality of sub-band channels.