# US 2019/0173630 A1 · Multi-user multiplexing of orthogonal time frequency space signals > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2019/0173630 A1 - Document ID: US20190173630A1 - Status: Published application - Kind: A1 - Application number: 16/273,482 - Filed: 2019-02-12 - Published: 2019-06-06 - Earliest claimed: 2016-08-12 - Assignees: Cohere Technologies, Inc. - Applicants: Cohere Technologies, Inc. - Inventors: Shachar Kons; Ronny Hadani; Yoav Hebron - Web page: https://patentgrep.com/patent/US20190173630A1 ## CPC - H04L 5/0005: {Time-frequency} - H04J 4/00: Combined time-division and frequency-division multiplex systems (H04J13/00 takes precedence {; data transmission H04L5/26; telemetry G08C15/00}) - H04L 5/0026: {Division using four or more dimensions, e.g. beam steering or quasi-co-location [QCL]} - H04L 5/0037: {Inter-user or inter-terminal allocation} - H04L 5/0051: {of dedicated pilots, i.e. pilots destined for a single user or terminal} - H04L 23/02: adapted for orthogonal signalling - H04W 72/044: based on the type of the allocated resource - H04W 72/121: for groups of terminals or users - H04W 72/20: Control channels or signalling for resource management - G01S 7/41: using analysis of echo signal for target characterisation; Target signature; Target cross-section - H04L 5/0007: {the frequencies being orthogonal, e.g. OFDM(A) or DMT} - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) - 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) - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) - G01S: RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES ## Abstract A method for performing downlink transmissions from a transmitting device to multiple user devices using transmission resources from a multi-dimensional grid of resources is described. The method includes logically partitioning the transmission resources into multiple segments, assigning, to a given user device of the multiple user devices, transmission resources of one or more of the multiple segments, and performing, using at least some of the assigned transmission resources for the given user device, a downlink transmission using an orthogonal time frequency space (OTFS) transformation on data or signals to be transmitted to the given user device. ## Claims ### Claim 1 A wireless communication method for performing downlink transmissions from a transmitting device to multiple user devices using transmission resources from a multi-dimensional grid of resources, comprising: logically partitioning the transmission resources into multiple segments; assigning, to a given user device of the multiple user devices, transmission resources of one or more of the multiple segments; and performing, using at least some of the assigned transmission resources for the given user device, a downlink transmission using an orthogonal time frequency space (OTFS) transformation on data or signals to be transmitted to the given user device. ### Claim 2 (depends on 1) The method of claim 1, wherein the logically partitioning the transmission resource includes multiplexing the transmission resources along one dimension of the multi-dimensional grid of resources. ### Claim 3 (depends on 2) The method of claim 2, wherein the multi-dimensional grid of resources includes a delay dimension and a Doppler dimension and wherein the multiplexing the transmission resources includes multiplexing the transmission resources along the delay dimension. ### Claim 4 (depends on 2) The method of claim 2, wherein the multi-dimensional grid of resources includes a delay dimension and a Doppler dimension and wherein the multiplexing the transmission resources includes multiplexing the transmission resources along the Doppler dimension. ### Claim 5 (depends on 2) The method of claim 2, wherein the multi-dimensional grid or resources includes a time dimension and a frequency dimension and wherein the multiplexing the transmission resources includes multiplexing the transmission resources along the frequency dimension. ### Claim 6 (depends on 2) The method of claim 2, wherein the multi-dimensional grid or resources includes a time dimension and a frequency dimension and wherein the multiplexing the transmission resources includes multiplexing the transmission resources along the time dimension. ### Claim 7 (depends on 1) The method of claim 1, wherein the downlink transmission includes a reference signal to enable channel estimation by the given user device. ### Claim 8 (depends on 7) The method of claim 7, wherein the reference signal is based on an identity of the given user device. ### Claim 9 (depends on 1) The method of claim 1, wherein the multi-dimensional grid of resources comprises a two-dimensional grid of resources. ### Claim 10 (depends on 1) The method of claim 1, wherein the multi-dimensional grid of resource comprises a delay dimension and a Doppler dimension. ### Claim 11 (depends on 1) The method of claim 1, wherein the partitioning is non-uniformly spaced in the multi-dimensional grid of resources. ### Claim 12 A wireless communication method for performing uplink transmissions from multiple user devices using transmission resources from a multi-dimensional grid of resources to a receiving device, comprising: logically partitioning the transmission resources into multiple segments; assigning, to a given user device of the multiple user devices, transmission resources of one or more of the multiple segments; and performing, an uplink transmission from the given user device using at least some of the assigned transmission resources for the given user device, wherein the uplink transmission includes data that has undergone an orthogonal time frequency space (OTFS) transform. ### Claim 13 (depends on 12) The method of claim 12, wherein the logically partitioning the transmission resource includes multiplexing the transmission resources along one dimension of the multi-dimensional grid of resources. ### Claim 14 (depends on 13) The method of claim 13, wherein the multi-dimensional grid or resources includes a delay dimension and a Doppler dimension and wherein the multiplexing the transmission resources includes multiplexing the transmission resources along the delay dimension. ### Claim 15 (depends on 13) The method of claim 13, wherein the multi-dimensional grid or resources includes a delay dimension and a Doppler dimension and wherein the multiplexing the transmission resources includes multiplexing the transmission resources along the Doppler dimension. ### Claim 16 (depends on 13) The method of claim 13, wherein the two dimensional grid or resources includes a delay dimension and a Doppler dimension and wherein the multiplexing the transmission resources includes multiplexing the transmission resources along the frequency dimension. ### Claim 17 (depends on 13) The method of claim 13, wherein the two dimensional grid or resources includes a delay dimension and a Doppler dimension and wherein the multiplexing the transmission resources includes multiplexing the transmission resources along the time dimension. ### Claim 18 (depends on 12) The method of claim 12, wherein the logical partitioning is non-uniformly spaced in the multi-dimensional grid of resources. ### Claim 19 (depends on 12) The method of claim 12, wherein the uplink transmission includes a reference signal to enable channel estimation by the receiving device. ### Claim 20 (depends on 19) The method of claim 19, wherein the reference signal is based on an identity of the transmitting device. ### Claim 21 A wireless communication method for performing transmissions between a wireless device to multiple user devices, comprising: logically grouping the multiple user devices into a first group of user devices and a second group of user devices; allocating a first group of transmission resources to the first group of user devices and a second group of transmission resources to the second group of user devices by multiplexing along a first dimension of a first multi-dimensional representation of transmission resources; allocating, from the first group of transmission resources, transmissions resources to user devices in the first group by multiplexing along a second dimension in a second multi-dimensional representation of the transmission resources; and performing a transmission between the wireless device and at least one user device using corresponding allocated transmission resources. ### Claim 22 (depends on 21) The method of claim 21, wherein the first multi-dimensional representation comprises a time-frequency representation and the second multi-dimensional representation comprises a delay-Doppler representation. ### Claim 23 (depends on 22) The method of claim 22, wherein the first dimension of the first multi-dimensional representation comprises a frequency dimension. ### Claim 24 (depends on 22) The method of claim 22, wherein the first dimension of the first multi-dimensional representation comprises a time dimension. ### Claim 25 (depends on 22) The method of claim 22, wherein the second dimension of the second multi-dimensional representation comprises a delay dimension. ### Claim 26 (depends on 22) The method of claim 22, wherein the second dimension of the second multi-dimensional representation comprises a Doppler dimension. ### Claim 27 (depends on 22) The method of claim 22, wherein the transmission is performed from the wireless device to the at least one user device. ### Claim 28 (depends on 22) The method of claim 22, wherein the transmission is performed from the at least one user device to the wireless device. ### Claim 29 (depends on 21) The method of claim 21, wherein the first group of receiving devices includes one or more receiving devices and the second group of receiving devices includes one or more receiving devices. ### Claim 30 (depends on 21) The method of claim 21, wherein the transmissions includes a reference signal to enable channel estimation by a given receiving device. ### Claim 31 (depends on 21) The method of claim 21, wherein the reference signal is based on an identity of the given transmitting device.