# US 12,192,151 B2 · Reliability using signal space diversity in cooperative non-orthogonal multiple access (NOMA) > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,192,151 B2 - Document ID: US12192151B2 - Status: Granted - Kind: B2 - Application number: 17/624,622 - Filed: 2019-08-12 - Published: 2022-08-25 - Granted: 2025-01-07 - Earliest claimed: 2019-08-12 - Assignees: Telefonaktiebolaget LM Ericsson (publ) - Applicants: Telefonaktiebolaget LM Ericsson (publ) - Inventors: Hamza Sokun - Web page: https://patentgrep.com/patent/US12192151B2 ## CPC - H04L 1/02: by diversity reception - H04L 5/0083: {symbol-by-symbol} - H04B 7/022: Site diversity; Macro-diversity (using two or more spaced independent antennas H04B7/04) - H04B 7/0413: MIMO systems - H04J 11/0026: {of multi-user interference} - H04L 1/0071: {Use of interleaving (interleaving per se H03M13/27)} - H04L 5/0005: {Time-frequency} - H04L 27/3444: {by applying a certain rotation to regular constellations} - H04B 7/15592: {Adapting at the relay station communication parameters for supporting cooperative relaying, i.e. transmission of the same data via direct - and relayed path (cooperative diversity H04B7/024)} - H04L 1/0041: {Arrangements at the transmitter end} - H04L 1/0045: {Arrangements at the receiver end} - H04L 2001/0097: {Relays} - Y02D 30/70: in wireless communication networks - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) - H04B: TRANSMISSION - H04J: MULTIPLEX COMMUNICATION (transmission in general H04B; peculiar to transmission of digital information H04L5/00; systems for the simultaneous or sequential transmission of more than one television signal H04N7/08; in exchanges H04Q11/00; stereophonic systems H04S) - 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 A method, network node and user equipment are provided. In one or more embodiments, a first user equipment, UE, configured to communicate with a second UE for performing non-orthogonal multiple access, NOMA, communication is provided. The first UE includes processing circuitry configured to receive a first signal including a first component of interleaved-rotated symbols associated with the second UE, determine a second component of the interleaved-rotated symbols based at least in part on the received first component, and cause transmission of a second signal including the second component of the interleaved-rotated symbols to the second UE as part of the NOMA communication where the second signal not including the first component of the interleaved-rotated symbols. ## Claims ### Claim 1 A first user equipment, UE, (UE-1) configured to communicate with a second UE (UE-2) for performing non-orthogonal multiple access, NOMA, communication, the first UE (UE-1) comprising processing circuitry configured to: receive a first signal including a first component of interleaved-rotated symbols associated with the second UE (UE-2); determine a second component of the interleaved-rotated symbols based at least in part on the received first component; and cause transmission of a second signal including the second component of the interleaved-rotated symbols to the second UE (UE-2) as part of the NOMA communication, the second signal not including the first component of the interleaved-rotated symbols. ### Claim 2 A first user equipment, UE, (UE-2) configured to communicate with a second UE (UE-1) and a network node for performing non-orthogonal multiple access, NOMA, communication, the first UE comprising processing circuitry configured to: receive a first signal as part of the NOMA communication, the first signal including a first component of interleaved-rotated symbols associated with the first UE (UE-2); receive a second signal as part of the NOMA communication, the second signal including a second component of interleaved-rotated symbols associated with the first UE (UE-2), the second signal not including the first component of interleaved-rotated symbols; and determine original symbols based at least in part on the first and second signals. ### Claim 3 A method implemented by a first user equipment, UE, (UE-1) configured to communicate with a second UE (UE-2) for performing non-orthogonal multiple access, NOMA, communication, the method comprising: receiving a first signal including a first component of interleaved-rotated symbols associated with the second UE (UE-2); determining a second component of the interleaved-rotated symbols based at least in part on the received first component; and causing transmission of a second signal including the second component of the interleaved-rotated symbols to the second UE (UE-2) as part of the NOMA communication, the second signal not including the first component of the interleaved-rotated symbols. ### Claim 4 (depends on 3) The method of claim 3, wherein determining the second component of the interleaved-rotated symbols includes: decoding the first component of the interleaved-rotated symbols into deinterleaved-rotated first and second symbols; and interleaving the deinterleaved-rotated components of the rotated symbols to generate the second component of the interleaved-rotated symbols that was not included in the first signal. ### Claim 5 (depends on 3) The method of claim 3, wherein determining the second component of the interleaved-rotated symbols includes: decoding the first component of the interleaved-rotated symbols to generate deinterleaved and unrotated first and second original symbols; rotating the first and second original symbols to generate rotated first and second symbols; and interleaving the rotated components of the rotated symbols to generate the second component of the interleaved-rotated symbols that was not included in the first signal. ### Claim 6 (depends on 3) The method of claim 3, wherein the first signal is a superimposed signal including the first component of interleaved-rotated symbols associated with the second UE (UE-2) and another component of interleaved-rotated symbols associated with the first UE (UE-1); and the second signal not including components of interleaved-rotated symbols associated with the first UE (UE-1). ### Claim 7 (depends on 3) The method of claim 3, wherein the first signal is received in a first time slot and the second signal is transmitted in a second time slot, the second time slot occurring after the first time slot. ### Claim 8 (depends on 7) The method of claim 7, further comprising: receiving, in a third time slot, a third signal including the second component of interleaved-rotated symbols associated with the second UE (UE-2); determining the first component of the interleaved-rotated symbols based at least in part on the received first component of the interleaved-rotated symbols; and causing transmission, in a fourth time slot occurring after the third time slot, of a fourth signal including the first component of the interleaved-rotated symbols to the second UE (UE-2) as part of the NOMA communication, the fourth signal not including the second component of the interleaved-rotated symbols. ### Claim 9 (depends on 3) The method of claim 3, wherein the first component of interleaved-rotated symbols corresponds to interleaved in-phase and quadrature components of rotated symbols. ### Claim 10 (depends on 3) The method of claim 3, wherein the first UE (UE-1) is a relay UE communicating with the second UE (UE-2) over a wireless communication channel having a higher signal to noise ratio, SNR, than other wireless communication channels between the second UE (UE-2) and other UEs (UE-2). ### Claim 11 (depends on 3) The method of claim 3, wherein the first and second components of the interleaved-rotated symbols are part of an expanded constellation of symbols that is expanded from a rotated constellation of rotated symbols. ### Claim 12 (depends on 11) The method of claim 11, wherein the rotated constellation of symbols corresponds to a rotation of an original constellation of original symbols by a predefined quantity. ### Claim 13 (depends on 12) The method of claim 12, wherein the predefined quantity of rotation is based at least in part on a signal-to-interference-plus-noise ratio, SINR. ### Claim 14 A method implemented by a first user equipment, UE, (UE-2) configured to communicate with a second UE and a network node for performing non-orthogonal multiple access, NOMA, communication, the method comprising: receiving a first signal as part of the NOMA communication, the first signal including a first component of interleaved-rotated symbols associated with the first UE (UE-2); receiving a second signal as part of the NOMA communication, the second signal including a second component of interleaved-rotated symbols associated with the first UE (UE-2), the second signal not including the first component of interleaved-rotated symbols; and determining original symbols based at least in part on the first and second signals. ### Claim 15 (depends on 14) The method of claim 14, wherein the first signal is a superimposed signal including the first component of interleaved-rotated symbols associated with the first UE (UE-2) and another component of interleaved-rotated symbols associated with the second UE (UE-1). ### Claim 16 (depends on 14) The method of claim 14, wherein the first signal is received in a first time slot and the second signal is transmitted in a second time slot that occurs after the first time slot. ### Claim 17 (depends on 16) The method of claim 16, further comprising: receiving a third signal during a third time slot as part of the NOMA communication, the third signal including the second component of interleaved-rotated symbols associated with the first UE (UE-2); receiving a fourth signal during a fourth time slot as part of the NOMA communication, the fourth signal including the first component of interleaved-rotated symbols associated with the first UE (UE-2), the fourth signal not including the second component of interleaved-rotated symbols; and the determining of the original symbols being further based at least in part on the third and fourth signals. ### Claim 18 (depends on 14) The method of claim 14, wherein the first component of interleaved-rotated symbols correspond to interleaved in-phase and quadrature components of rotated symbols. ### Claim 19 (depends on 14) The method of claim 14, wherein the second UE (UE-1) is a relay UE communicating with the first UE (UE-2) over a channel having a higher signal to noise ratio, SNR, than other channels between the first UE (UE-2) and other UEs (UE-3). ### Claim 20 (depends on 14) The method of claim 14, wherein the first and second components of the interleaved-rotated symbols are part of an expanded constellation of symbols that is expanded from a rotated constellation of rotated symbols. ### Claim 21 (depends on 18) The method of claim 18, wherein the rotated constellation of symbols corresponds to a rotation of an original constellation of original symbols by a predefined quantity. ### Claim 22 (depends on 21) The method of claim 21, wherein the predefined quantity of rotation is based at least in part on a signal-to-interference-plus-noise ratio, SINR. ### Claim 23 (depends on 14) The method of claim 14, further comprising: receiving at least one other signal including the second component of interleaved-rotated symbols associated with the first UE (UE-2) from at least one other UE (UE-3); determining the second signal including the second component of interleaved-rotated symbols associated with the first UE (UE-2) has a higher signal to noise ratio, SNR, than the at least one other signal; and the determining of the original symbols not being based at least in part on the at least one other signal including the second component. ### Claim 24 (depends on 14) The method of claim 14, wherein the first signal is received from the network node (16) and the second signal is received from the second UE (UE-1) acting as a relay UE.