# US 2018/0323925 A1 · Transmitting reference signals based on wireless communications timeline > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2018/0323925 A1 - Document ID: US20180323925A1 - Status: Published application - Kind: A1 - Application number: 15/969,366 - Filed: 2018-05-02 - Published: 2018-11-08 - Earliest claimed: 2017-05-04 - Assignees: QUALCOMM Incorporated - Applicants: QUALCOMM Incorporated - Inventors: Yi HUANG; Renqiu WANG; Seyong PARK; Hao XU; Peter GAAL; Wanshi CHEN; Alexandros MANOLAKOS - Web page: https://patentgrep.com/patent/US20180323925A1 ## CPC - H04L 5/0051: {of dedicated pilots, i.e. pilots destined for a single user or terminal} - 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 5/0053: {Allocation of signalling, i.e. of overhead other than pilot signals} - H04L 5/0078: {Timing of allocation} - H04L 7/0337: {Selecting between two or more discretely delayed clocks or selecting between two or more discretely delayed received code signals} - H04L 27/2613: {Structure of the reference signals} - H04W 72/23: in the downlink direction of a wireless link, i.e. towards a terminal - H04L 5/0007: {the frequencies being orthogonal, e.g. OFDM(A) or DMT} - H04L 5/0012: {Hopping in multicarrier systems} - H04L 5/1469: {using time-sharing} - H04W 72/1268: of uplink data flows - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) ## Abstract Aspects herein describe transmitting a reference signal in wireless communications. A configured delay value related to a delay in communications can be determined based on receiving a corresponding resource grant. A time division of a slot for transmitting a reference signal for the communications can be determined based at least in part on the configured delay value. The reference signal can be transmitted during the time division of the slot. ## Claims ### Claim 1 A method for transmitting a reference signal in wireless communications, comprising: determining a configured delay value related to a delay in communications between receiving a corresponding resource grant and transmitting uplink communications over resources indicated by the corresponding resource grant; determining, based at least in part on the configured delay value, a time division of a slot for transmitting a reference signal for the communications; and transmitting the reference signal during the time division of the slot. ### Claim 2 (depends on 1) The method of claim 1, wherein determining the configured delay value comprises determining that the configured delay value indicates transmitting the communications in a same slot during which the corresponding resource grant is received, and wherein determining the time division of the slot for transmitting the reference signal comprises determining the time division of the slot as a first symbol of an uplink portion of the slot. ### Claim 3 (depends on 2) The method of claim 2, wherein determining the first symbol of the uplink portion of the slot comprises determining the first symbol as adjacent to a last symbol in a downlink portion of the slot as adjacent to a last symbol in a guard period following the downlink portion of the slot. ### Claim 4 (depends on 1) The method of claim 1, further comprising: determining a subsequent time division of the slot for transmitting the reference signal at a different frequency portion than used for transmitting the reference signal during the time division of the slot, wherein determining the subsequent time division of the slot comprises determining another first symbol of another uplink portion of the slot corresponding to the different frequency portion; and transmitting the reference signal during the subsequent time division of the slot. ### Claim 5 (depends on 1) The method of claim 1, wherein determining the configured delay value comprises determining that the configured delay value indicates transmitting the communications in a subsequent slot as receiving the corresponding resource grant, and wherein determining the time division of the slot for transmitting the reference signal comprises determining the time division of the slot as a symbol corresponding to a fixed symbol index of the slot. ### Claim 6 (depends on 5) The method of claim 5, further comprising receiving, from a base station, an indication of the fixed symbol index. ### Claim 7 (depends on 5) The method of claim 5, further comprising: determining, based on the determining that the configured delay value indicates transmitting the communications in the subsequent slot, a subsequent time division of the slot as another fixed symbol index of the slot for optionally transmitting the reference signal; and transmitting the reference signal during the subsequent time division of the slot. ### Claim 8 An apparatus for transmitting a reference signal in wireless communications, comprising: a transceiver for communicating one or more wireless signals via at least a transmitter and one or more antennas; a memory configured to store instructions; and one or more processors communicatively coupled with the transceiver and the memory, wherein the one or more processors are configured to: determine a configured delay value related to a delay in communications between receiving a corresponding resource grant and transmitting uplink communications over resources indicated by the corresponding resource grant; determine, based at least in part on the configured delay value, a time division of a slot for transmitting a reference signal for the communications; and transmit the reference signal during the time division of the slot. ### Claim 9 (depends on 8) The apparatus of claim 8, wherein the one or more processors are configured to determine that the configured delay value indicates transmitting the communications in a same slot during which the corresponding resource grant is received, and wherein the one or more processors are configured to determine the time division of the slot as a first symbol of an uplink portion of the slot. ### Claim 10 (depends on 9) The apparatus of claim 9, wherein the one or more processors are configured to determine the first symbol of the uplink portion of the slot as the first symbol as adjacent to a last symbol in a downlink portion of the slot as adjacent to a last symbol in a guard period following the downlink portion of the slot. ### Claim 11 (depends on 8) The apparatus of claim 8, wherein the one or more processors are further configured to: determine a subsequent time division of the slot for transmitting the reference signal at a different frequency portion than used for transmitting the reference signal during the time division of the slot, wherein the one or more processors are configured to determine the subsequent time division of the slot as another first symbol of another uplink portion of the slot corresponding to the different frequency portion; and transmit the reference signal during the subsequent time division of the slot. ### Claim 12 (depends on 8) The apparatus of claim 8, wherein the one or more processors are configured to determine that the configured delay value indicates transmitting the communications in a subsequent slot as receiving the corresponding resource grant, and wherein the one or more processors are configured to determine the time division of the slot as a symbol corresponding to a fixed symbol index of the slot. ### Claim 13 (depends on 12) The apparatus of claim 12, wherein the one or more processors are further configured to receive, from a base station, an indication of the fixed symbol index. ### Claim 14 (depends on 12) The apparatus of claim 12, wherein the one or more processors are further configured to: determine, based on the determining that the configured delay value indicates transmitting the communications in the subsequent slot, a subsequent time division of the slot as another fixed symbol index of the slot for optionally transmitting the reference signal; and transmit the reference signal during the subsequent time division of the slot. ### Claim 15 An apparatus for transmitting a reference signal in wireless communications, comprising: means for determining a configured delay value related to a delay in communications between receiving a corresponding resource grant and transmitting uplink communications over resources indicated by the corresponding resource grant; means for determining, based at least in part on the configured delay value, a time division of a slot for transmitting a reference signal for the communications; and means for transmitting the reference signal during the time division of the slot. ### Claim 16 (depends on 15) The apparatus of claim 15, wherein the means for determining the configured delay value determines that the configured delay value indicates transmitting the communications in a same slot during which the corresponding resource grant is received, and wherein the means for determining the time division of the slot for transmitting the reference signal determines the time division of the slot as a first symbol of an uplink portion of the slot. ### Claim 17 (depends on 16) The apparatus of claim 16, wherein the means for determining the first symbol of the uplink portion of the slot determines the first symbol as adjacent to a last symbol in a downlink portion of the slot as adjacent to a last symbol in a guard period following the downlink portion of the slot. ### Claim 18 (depends on 15) The apparatus of claim 15, further comprising: means for determining a subsequent time division of the slot for transmitting the reference signal at a different frequency portion than used for transmitting the reference signal during the time division of the slot, wherein the means for determining the subsequent time division of the slot determines another first symbol of another uplink portion of the slot corresponding to the different frequency portion; and means for transmitting the reference signal during the subsequent time division of the slot. ### Claim 19 (depends on 15) The apparatus of claim 15, wherein the means for determining the configured delay value determines that the configured delay value indicates transmitting the communications in a subsequent slot as receiving the corresponding resource grant, and wherein the means for determining the time division of the slot for transmitting the reference signal determines the time division of the slot as a symbol corresponding to a fixed symbol index of the slot. ### Claim 20 (depends on 19) The apparatus of claim 19, further comprising means for receiving, from a base station, an indication of the fixed symbol index. ### Claim 21 (depends on 19) The apparatus of claim 19, further comprising: means for determining, based on the determining that the configured delay value indicates transmitting the communications in the subsequent slot, a subsequent time division of the slot as another fixed symbol index of the slot for optionally transmitting the reference signal; and means for transmitting the reference signal during the subsequent time division of the slot. ### Claim 22 A computer-readable medium, comprising code executable by one or more processors for transmitting a reference signal in wireless communications, the code comprising: code for determining a configured delay value related to a delay in communications between receiving a corresponding resource grant and transmitting uplink communications over resources indicated by the corresponding resource grant; code for determining, based at least in part on the configured delay value, a time division of a slot for transmitting a reference signal for the communications; and code for transmitting the reference signal during the time division of the slot. ### Claim 23 (depends on 22) The computer-readable medium of claim 22, wherein the code for determining the configured delay value determines that the configured delay value indicates transmitting the communications in a same slot during which the corresponding resource grant is received, and wherein the code for determining the time division of the slot for transmitting the reference signal determines the time division of the slot as a first symbol of an uplink portion of the slot. ### Claim 24 (depends on 23) The computer-readable medium of claim 23, wherein the code for determining the first symbol of the uplink portion of the slot determines the first symbol as adjacent to a last symbol in a downlink portion of the slot as adjacent to a last symbol in a guard period following the downlink portion of the slot. ### Claim 25 (depends on 22) The computer-readable medium of claim 22, further comprising: code for determining a subsequent time division of the slot for transmitting the reference signal at a different frequency portion than used for transmitting the reference signal during the time division of the slot, wherein the code for determining the subsequent time division of the slot determines another first symbol of another uplink portion of the slot corresponding to the different frequency portion; and code for transmitting the reference signal during the subsequent time division of the slot. ### Claim 26 (depends on 22) The computer-readable medium of claim 22, wherein the code for determining the configured delay value determines that the configured delay value indicates transmitting the communications in a subsequent slot as receiving the corresponding resource grant, and wherein the code for determining the time division of the slot for transmitting the reference signal determines the time division of the slot as a symbol corresponding to a fixed symbol index of the slot. ### Claim 27 (depends on 26) The computer-readable medium of claim 26, further comprising code for receiving, from a base station, an indication of the fixed symbol index. ### Claim 28 (depends on 26) The computer-readable medium of claim 26, further comprising: code for determining, based on the determining that the configured delay value indicates transmitting the communications in the subsequent slot, a subsequent time division of the slot as another fixed symbol index of the slot for optionally transmitting the reference signal; and code for transmitting the reference signal during the subsequent time division of the slot. ### Claim 29 A method for configuring transmission of a reference signal in wireless communications, comprising: indicating, to a user equipment (UE), a configured delay value related to a delay in communications between receiving a corresponding resource grant and transmitting uplink communications over resources indicated by the corresponding resource grant; indicating, to the UE, an indication of a fixed symbol index for transmitting a reference signal based at least in part on the configured delay value; and receiving at least the reference signal from the UE in a symbol of a slot corresponding to the fixed symbol index. ### Claim 30 (depends on 29) The method of claim 29, wherein receiving at least the reference signal in the symbol is based at least in part on indicating the configured delay value as the communications in a same slot as receiving the corresponding resource grant. ### Claim 31 An apparatus for configuring transmission of a reference signal in wireless communications, comprising: a transceiver for communicating one or more wireless signals via at least a transmitter and one or more antennas; a memory configured to store instructions; and one or more processors communicatively coupled with the transceiver and the memory, wherein the one or more processors are configured to: indicate, to a user equipment (UE), a configured delay value related to a delay in communications between receiving a corresponding resource grant and transmitting uplink communications over resources indicated by the corresponding resource grant; indicate, to the UE, an indication of a fixed symbol index for transmitting a reference signal based at least in part on the configured delay value; and receive at least the reference signal from the UE in a symbol of a slot corresponding to the fixed symbol index. ### Claim 32 (depends on 31) The apparatus of claim 31, wherein the one or more processors are configured to receive at least the reference signal in the symbol based at least in part on indicating the configured delay value as the communications in a same slot as receiving the corresponding resource grant. ### Claim 33 An apparatus for configuring transmission of a reference signal in wireless communications, comprising: means for indicating, to a user equipment (UE), a configured delay value related to a delay in communications between receiving a corresponding resource grant and transmitting uplink communications over resources indicated by the corresponding resource grant; means for indicating, to the UE, an indication of a fixed symbol index for transmitting a reference signal based at least in part on the configured delay value; and means for receiving at least the reference signal from the UE in a symbol of a slot corresponding to the fixed symbol index. ### Claim 34 (depends on 33) The apparatus of claim 33, wherein the means for receiving at least the reference signal in the symbol receives based at least in part on indicating the configured delay value as the communications in a same slot as receiving the corresponding resource grant. ### Claim 35 A computer-readable medium, comprising code executable by one or more processors for configuring transmission of a reference signal in wireless communications, the code comprising: code for indicating, to a user equipment (UE), a configured delay value related to a delay in communications between receiving a corresponding resource grant and transmitting uplink communications over resources indicated by the corresponding resource grant; code for indicating, to the UE, an indication of a fixed symbol index for transmitting a reference signal based at least in part on the configured delay value; and code for receiving at least the reference signal from the UE in a symbol of a slot corresponding to the fixed symbol index. ### Claim 36 (depends on 35) The computer-readable medium of claim 35, wherein the code for receiving at least the reference signal in the symbol receives based at least in part on indicating the configured delay value as the communications in a same slot as receiving the corresponding resource grant.