# US 11,910,438 B2 · Listen before talk sequence design for wireless communication > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,910,438 B2 - Document ID: US11910438B2 - Status: Granted - Kind: B2 - Application number: 17/456,551 - Filed: 2021-11-24 - Published: 2022-03-17 - Granted: 2024-02-20 - Earliest claimed: 2017-10-19 - Assignees: QUALCOMM Incorporated - Applicants: QUALCOMM Incorporated - Inventors: Tien Viet Nguyen; Sudhir Kumar Baghel; Kapil Gulati; Libin Jiang; Zhibin Wu; Shailesh Patil - Web page: https://patentgrep.com/patent/US11910438B2 ## CPC - H04W 74/0816: with collision avoidance - H04L 5/0044: {Allocation of payload; Allocation of data channels, e.g. PDSCH or PUSCH} - H04L 5/0048: {Allocation of pilot signals, i.e. of signals known to the receiver (allocation of control signalling H04L5/0053; use of control signalling H04L5/0091)} - H04L 27/0006: {Assessment of spectral gaps suitable for allocating digitally modulated signals, e.g. for carrier allocation in cognitive radio (for spectrum sharing between different networks H04W16/14)} - H04W 4/40: for vehicles, e.g. vehicle-to-pedestrians [V2P] - H04W 72/0446: Resources in time domain, e.g. slots or frames - H04W 4/44: for communication between vehicles and infrastructures, e.g. vehicle-to-cloud [V2C] or vehicle-to-home [V2H] - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) ## Abstract An apparatus for wireless communication of a UE determines to transmit data in a set of RBs to at least one other UE in at least one subframe. The at least one subframe includes a first subset of symbols configured for use for transmission collision avoidance signaling and a second subset of symbols configured for transmitting the data. The apparatus determines a subset of symbols of the first set of symbols within the set of RBs of the at least one subframe for transmitting at least one concatenated sequence. The apparatus transmits the at least one concatenated sequence in each symbol of the determined subset of symbols within the set of RBs of the at least one subframe to indicate that the data will be transmitted in the second set of symbols within the set of RBs of the at least one subframe. ## Claims ### Claim 1 A method of wireless communication of a user equipment (UE), comprising: receiving a transmission in a subset of symbols from at least one UE, each transmission including at least one concatenated sequence in each symbol of the subset of symbols for transmission collision avoidance signaling; determining a set of resource blocks (RBs) on which each transmission is received from the at least one UE; and receiving data on each determined set of RBs associated with each UE of the at least one UE, the transmission and the data being received on at least one subframe; wherein each symbol of the subset of symbols is associated with at least one subchannel, each of the at least one subchannel extends across x RBs, and each sequence of the at least one concatenated sequence from an ith UEi of the at least one UE is received in each symbol of the subset of symbols within a different subchannel of the at least one subframe. ### Claim 2 (depends on 1) The method of claim 1, further comprising determining, for each received transmission from a transmitting UE of the at least one UE, that the data is to be received from the transmitting UE on the determined set of RBs. ### Claim 3 (depends on 1) The method of claim 1, wherein a first subframe of the at least one subframe includes a first slot and a second slot, and the subset of symbols includes m−i+1 consecutive symbols i, i+1, . . . , m of the first slot, where 0≤i≤m and 2≤m≤6. ### Claim 4 (depends on 1) The method of claim 1, wherein x≥2. ### Claim 5 (depends on 4) The method of claim 4, wherein x=p5, where p is an integer greater than or equal to one. ### Claim 6 (depends on 1) The method of claim 1, wherein each sequence of the at least one concatenated sequence from the ith UEi of the at least one UE is received in a comb structure in every other subcarrier of each symbol of the subset of symbols within a different set of x RBs of the at least one subframe. ### Claim 7 (depends on 1) The method of claim 1, wherein each sequence of the at least one concatenated sequence has length equal to 6x. ### Claim 8 (depends on 1) The method of claim 1, wherein the at least one UE comprises a plurality of UEs, and the at least one concatenated sequence from each UE of the plurality of UEs at least partially overlap in each symbol of the subset of symbols by ax RBs, where a is an integer greater than zero. ### Claim 9 (depends on 1) The method of claim 1, wherein the determining the set of RBs on which each transmission is received from the at least one UE comprises: cross correlating the transmission received in each set of x RBs with a known sequence; and detecting sequences received based on the cross correlation, wherein the set of RBs on which each transmission is received from the at least one UE is determined based on the detected sequences. ### Claim 10 (depends on 1) The method of claim 1, wherein each sequence of the at least one concatenated sequence is one of y sequences, where y≥4. ### Claim 11 (depends on 10) The method of claim 10, wherein a first sequence is sequence s1, a second sequence is sequence s2, a third sequence is sequence s3, and a fourth sequence is sequence s4, and wherein the at least one concatenated sequence from an ith UEi of the at least one UE comprises zi concatenated sequences, and the zi concatenated sequences comprise: one s4 sequence when zi=1; and one s1 sequence, n s2 sequences, and one s3 sequence when zi=2+n, for n≥0. ### Claim 12 (depends on 1) The method of claim 1, wherein each sequence of the at least one concatenated sequence for each UE of the at least one UE is a Zadoff-Chu sequence. ### Claim 13 An apparatus of wireless communication of a user equipment (UE), comprising: a memory; and at least one processor coupled to the memory, the at least one processor being configured to: receive a transmission in a subset of symbols from at least one UE, each transmission including at least one concatenated sequence in each symbol of the subset of symbols for transmission collision avoidance; determine a set of resource blocks (RBs) on which each transmission is received from the at least one UE; and receive data on each determined set of RBs associated with each UE of the at least one UE, the transmission and the data being received on at least one subframe; wherein each symbol of the subset of symbols is associated with at least one subchannel, each of the at least one subchannel extends across x RBs, and each sequence of the at least one concatenated sequence from an ith UEi of the at least one UE is received in each symbol of the subset of symbols within a different subchannel of the at least one subframe. ### Claim 14 (depends on 13) The apparatus of claim 13, wherein the at least one processor is further configured to determine, for each received transmission from a transmitting UE of the at least one UE, that the data is to be received from the transmitting UE on the determined set of RBs. ### Claim 15 (depends on 13) The apparatus of claim 13, wherein a first subframe of the at least one subframe includes a first slot and a second slot, and the subset of symbols includes m−i+1 consecutive symbols i, i+1, . . . , m of the first slot, where 0≤i≤m and 2≤m≤6. ### Claim 16 (depends on 13) The apparatus of claim 13, wherein x≥2. ### Claim 17 (depends on 16) The apparatus of claim 16, wherein x=p5, where p is an integer greater than or equal to one. ### Claim 18 (depends on 13) The apparatus of claim 13, wherein each sequence of the at least one concatenated sequence from the ith UEi of the at least one UE is received in a comb structure in every other subcarrier of each symbol of the subset of symbols within a different set of x RBs of the at least one subframe. ### Claim 19 (depends on 13) The apparatus of claim 13, wherein each sequence of the at least one concatenated sequence has length equal to 6x. ### Claim 20 (depends on 13) The apparatus of claim 13, wherein the at least one UE comprises a plurality of UEs, and the at least one concatenated sequence from each UE of the plurality of UEs at least partially overlap in each symbol of the subset of symbols by ax RBs, where a is an integer greater than zero. ### Claim 21 (depends on 13) The apparatus of claim 13, wherein to determine the set of RBs on which each transmission is received from the at least one UE, the at least one processor is further configured to: cross correlate the transmission received in each set of x RBs with a known sequence; and detect sequences received based on the cross correlation, wherein the set of RBs on which each transmission is received from the at least one UE is determined based on the detected sequences. ### Claim 22 (depends on 13) The apparatus of claim 13, wherein each sequence of the at least one concatenated sequence is one of y sequences, where y≥4. ### Claim 23 (depends on 22) The apparatus of claim 22, wherein a first sequence is sequence s1, a second sequence is sequence s2, a third sequence is sequence s3, and a fourth sequence is sequence s4, and wherein the at least one concatenated sequence from an ith UEi of the at least one UE comprises zi concatenated sequences, and the zi concatenated sequences comprise: one s4 sequence when zi=1; and one s1 sequence, n s2 sequences, and one s3 sequence when zi=2+n, for n≥0. ### Claim 24 (depends on 13) The apparatus of claim 13, wherein each sequence of the at least one concatenated sequence for each UE of the at least one UE is a Zadoff-Chu sequence. ### Claim 25 An apparatus of wireless communication of a user equipment (UE), comprising: means for receiving a transmission in a subset of symbols from at least one UE, each transmission including at least one concatenated sequence in each symbol of the subset of symbols for transmission collision avoidance; means for determining a set of resource blocks (RBs) on which each transmission is received from the at least one UE; and means for receiving data on each determined set of RBs associated with each UE of the at least one UE, the transmission and the data being received on at least one subframe; wherein each symbol of the subset of symbols is associated with at least one subchannel, each of the at least one subchannel extends across x RBs, and each sequence of the at least one concatenated sequence from an ith UEi of the at least one UE is received in each symbol of the subset of symbols within a different subchannel of the at least one subframe. ### Claim 26 (depends on 25) The apparatus of claim 25, wherein further comprising: means for determining, for each received transmission from a transmitting UE of the at least one UE, that the data is to be received from the transmitting UE on the determined set of RBs. ### Claim 27 (depends on 25) The apparatus of claim 25, wherein a first subframe of the at least one subframe includes a first slot and a second slot, and the subset of symbols includes m−i+1 consecutive symbols i, i+1, . . . , m of the first slot, where 0≤i≤m and 2≤m≤6. ### Claim 28 (depends on 25) The apparatus of claim 25, wherein x≥2. ### Claim 29 (depends on 28) The apparatus of claim 28, wherein x=p5, where p is an integer greater than or equal to one. ### Claim 30 (depends on 25) The apparatus of claim 25, wherein each sequence of the at least one concatenated sequence from the ith UEi of the at least one UE is received in a comb structure in every other subcarrier of each symbol of the subset of symbols within a different set of x RBs of the at least one subframe. ### Claim 31 (depends on 25) The apparatus of claim 25, wherein each sequence of the at least one concatenated sequence has length equal to 6x. ### Claim 32 (depends on 25) The apparatus of claim 25, wherein the at least one UE comprises a plurality of UEs, and the at least one concatenated sequence from each UE of the plurality of UEs at least partially overlap in each symbol of the subset of symbols by ax RBs, where a is an integer greater than zero. ### Claim 33 (depends on 25) The apparatus of claim 25, wherein the means for determining the set of RBs on which each transmission is received from the at least one UE is configured to: cross correlate the transmission received in each set of x RBs with a known sequence; and detect sequences received based on the cross correlation, wherein the set of RBs on which each transmission is received from the at least one UE is determined based on the detected sequences. ### Claim 34 A non-transitory computer-readable medium storing computer executable code for wireless communication of a user equipment (UE), comprising code to: receive a transmission in a subset of symbols from at least one UE, each transmission including at least one concatenated sequence in each symbol of the subset of symbols for transmission collision avoidance; determine a set of resource blocks (RBs) on which each transmission is received from the at least one UE; and receive data on each determined set of RBs associated with each UE of the at least one UE, the transmission and the data being received on at least one subframe; wherein each symbol of the subset of symbols is associated with at least one subchannel, each of the at least one subchannel extends across x RBs, and each sequence of the at least one concatenated sequence from an ith UEi of the at least one UE is received in each symbol of the subset of symbols within a different subchannel of the at least one subframe.