# US 10,484,157 B2 · UE supporting low-latency wireless communication, method and apparatus in base station > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,484,157 B2 - Document ID: US10484157B2 - Status: Granted - Kind: B2 - Application number: 15/916,213 - Filed: 2018-03-08 - Published: 2018-07-12 - Granted: 2019-11-19 - Earliest claimed: 2015-09-10 - Assignees: Shanghai Langbo Communication Technology Company Limited - Applicants: Shanghai Langbo Communication Technology Company Limited - Inventors: Xiaobo Zhang - Web page: https://patentgrep.com/patent/US10484157B2 ## CPC - H04L 5/0051: {of dedicated pilots, i.e. pilots destined for a single user or terminal} - H04L 5/0007: {the frequencies being orthogonal, e.g. OFDM(A) or DMT} - 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: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) ## Abstract A UE receives a first signaling indicating whether a Reference Signal (RS) pattern of a target RS set is a first pattern or a second pattern in a second LTE timeslot. Next, according to the indication of the first signaling, the target RS set and a second data are processed by a first operation in the second LTE. The target RS set includes P RSs, P being a positive integer, and the P RSs are respectively mapped to P antenna ports. The second data is transmitted by the P antenna ports. The second LTE timeslot is an LTE timeslot that is behind the first LTE timeslot and continuous with the first LTE timeslot. The first pattern is the RS pattern of the LTE downlink UE-specific Reference Signal in the LTE timeslot. This reduces network delay, improves channel estimation performance in short TTI scenes and maintains compatibility with current LTE equipment. ## Claims ### Claim 1 A method in a User Equipment (UE) supporting low-latency wireless communication, comprising: Step A: receiving a first signaling, the first signaling indicating at least one of the following: first information: whether a target Reference Signal (RS) set is transmitted in a first Long Term Evolution (LTE) timeslot; and second information: whether an RS pattern of the target RS set is a first pattern or a second pattern in a second LTE timeslot; Step B: according to the indication of the first signaling, receiving the target RS set and a second data in the second LTE timeslot; and Step B2 of Step B: according to the target RS set received in the second LTE timeslot, estimating a parameter of a wireless channel through which the second data passes; wherein: the target RS set comprises P RSs, P being a positive integer, and the P RSs are respectively mapped to P antenna ports; the second data is transmitted by the P antenna ports; the second LTE timeslot is an LTE timeslot that is behind the first LTE timeslot and continuous with the first LTE timeslot; the first pattern is the RS pattern of the LTE downlink UE-specific Reference Signal (URS) in the LTE timeslot; and the first information indicates that the target RS set is not transmitted in the first LTE timeslot, or the second information indicates that the RS pattern of the target RS set is the second pattern in the second LTE timeslot. ### Claim 2 (depends on 1) The method in a UE supporting low-latency wireless communication according to claim 1, wherein the second pattern is the RS pattern of the LTE downlink URS in the former 0.5 ms of a special subframe of a first configuration. ### Claim 3 (depends on 1) The method in a UE supporting low-latency wireless communication according to claim 1, wherein: Step A further comprises: Step A1: processing the target RS in the first LTE timeslot; Step B further comprises: Step B1: according to the target RS set received in the first LTE timeslot and the second LTE timeslot, estimating a parameter of a wireless channel through which the second data passes; and wherein the first information indicates that the target RS set is transmitted in the first LTE timeslot. ### Claim 4 (depends on 1) The method in a UE supporting low-latency wireless communication according to claim 1, wherein the target RS set comprises P LTE downlink URSs in the first LTE timeslot and the second LTE timeslot. ### Claim 5 (depends on 1) The method in a UE supporting low-latency wireless communication according to claim 1, wherein if the target RS set is transmitted in the first LTE timeslot, the RS pattern of the target RS set is the first pattern in the second LTE timeslot; otherwise, the RS pattern of the target RS set is the second pattern in the second LTE timeslot. ### Claim 6 A method in a base station supporting low-latency wireless communication, comprising: Step A: transmitting a first signaling, the first signaling indicating at least one of the following: first information: whether a target Reference Signal (RS) set is transmitted in a first Long Term Evolution (LTE) timeslot; and second information: whether an RS pattern of the target RS set is a first pattern or a second pattern in a second LTE timeslot; Step B: according to the indication of the first signaling, transmitting the target RS set and a second data in the second LTE timeslot; wherein: the target RS set comprises P RSs, P being a positive integer, and the P RSs are respectively mapped to P antenna ports; the second data is transmitted by the P antenna ports; the second LTE timeslot is an LTE timeslot that is behind the first LTE timeslot and continuous with the first LTE timeslot; the first pattern is the RS pattern of the LTE downlink UE-specific Reference Signal (URS) in the LTE timeslot; Step B further comprises: Step B2: determining a modulation coding mode of the second data according to the following assumption: a target UE estimates a parameter of a wireless channel through which the second data passes according to the target RS set received in the second LTE timeslot; and the first information indicates that the target RS set is not transmitted in the first LTE timeslot, or the second information indicates that the RS pattern of the target RS set is the second pattern in the second LTE timeslot; and the target UE is a receiving UE of the target RS set. ### Claim 7 (depends on 6) The method in a base station supporting low-latency wireless communication according to claim 6, wherein the second pattern is the RS pattern of the LTE downlink URS in the former 0.5 ms of a special subframe of a first configuration. ### Claim 8 (depends on 6) The method in a base station supporting low-latency wireless communication according to claim 6, wherein: Step A further comprises: Step A1: transmitting the target RS set in the first LTE timeslot; and wherein the first information indicates that the target RS set is transmitted in the first LTE timeslot. ### Claim 9 (depends on 6) The method in a base station supporting low-latency wireless communication according to claim 6, wherein the target RS set comprises P LTE downlink URSs in the first LTE timeslot and the second LTE timeslot, or, the target RS set comprises P LTE uplink DMRSs in a first LTE subframe and a second LTE subframe. ### Claim 10 (depends on 6) The method in a base station supporting low-latency wireless communication according to claim 6, wherein if the target RS set is transmitted in the first LTE timeslot, the RS pattern of the target RS set is the first pattern in the second LTE timeslot; otherwise, the RS pattern of the target RS set is the second pattern in the second LTE timeslot. ### Claim 11 A UE supporting low-latency wireless communication, comprising: a first receiver configured to receive a first signaling, the first receiver including one or more of hardware and instructions stored in computer-readable storage media, the first signaling indicating at least one of the following: first information: whether a target RS set is transmitted in a first LTE timeslot; and second information: whether an RS pattern of the target RS set is a first pattern or a second pattern in a second LTE timeslot; and a second receiver that includes one or more of hardware and instructions stored in computer-readable storage media and that is configured to: receive the target RS set and a second data in the second LTE timeslot according to the indication of the first signaling; and according to the target RS set received in the second LTE timeslot, estimate a parameter of a wireless channel through which the second data passes; wherein: the target RS set comprises P RSs, P being a positive integer, and the P RSs are respectively mapped to P antenna ports; the second data is transmitted by the P antenna ports; the second LTE timeslot is an LTE timeslot that is behind the first LTE timeslot and continuous with the first LTE timeslot; the first pattern is the RS pattern of the LTE downlink UE-specific Reference Signal (URS) in the LTE timeslot; and the first information indicates that the target RS set is not transmitted in the first LTE timeslot, or the second information indicates that the RS pattern of the target RS set is the second pattern in the second LTE timeslot. ### Claim 12 (depends on 11) The UE supporting low-latency wireless communication according to claim 11, wherein the second pattern is the RS pattern of the LTE downlink URS in the former 0.5 ms of a special subframe of a first configuration. ### Claim 13 A base station apparatus supporting low-latency wireless communication, comprising a first transmitter configured to transmit a first signaling, the first transmitter including one or more of hardware and instructions stored in computer-readable storage media, the first signaling indicating at least one of the following: first information: whether a target RS set is transmitted in a first LTE timeslot; and second information: whether an RS pattern of the target RS set is a first pattern or a second pattern in a second LTE timeslot; and a second transmitter that includes one or more of hardware and instructions stored in computer-readable storage media and that is configured to: transmit the target RS set and a second data by a second operation in the second LTE according to the indication of the first signaling; and determine a modulation coding mode of the second data according to the following assumption: a target UE estimates a parameter of a wireless channel through which the second data passes according to the target RS set received in the second LTE timeslot; wherein: the target RS set comprises P RSs, P being a positive integer, and the P RSs are respectively mapped to P antenna ports; the second data is transmitted by the P antenna ports; the second LTE timeslot is an LTE timeslot that is behind the first LTE timeslot and continuous with the first LTE timeslot; the first pattern is the RS pattern of the LTE downlink UE-specific Reference Signal (URS) in the LTE timeslot; and the first information indicates that the target RS set is not transmitted in the first LTE timeslot, or the second information indicates that the RS pattern of the target RS set is the second pattern in the second LTE timeslot; and the target UE is a receiving UE of the target RS set. ### Claim 14 (depends on 13) The base station apparatus supporting low-latency wireless communication according to claim 13, wherein the second pattern is the RS pattern of the LTE downlink URS in the former 0.5 ms of a special subframe of a first configuration.