# US 12,009,958 B2 · Methods and apparatuses for transmission and reception of demodulation reference signal > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,009,958 B2 - Document ID: US12009958B2 - Status: Granted - Kind: B2 - Application number: 17/133,001 - Filed: 2020-12-23 - Published: 2021-04-22 - Granted: 2024-06-11 - Earliest claimed: 2018-08-10 - Assignees: Fujitsu Limited - Applicants: Fujitsu Limited - Inventors: Jian Zhang; Pengyu Ji; Lei Zhang; Xin Wang - Web page: https://patentgrep.com/patent/US12009958B2 ## CPC - H04L 27/2602: {Signal structure} - H04L 27/2613: {Structure of the reference signals} - 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 5/0051: {of dedicated pilots, i.e. pilots destined for a single user or terminal} - H04W 72/0446: Resources in time domain, e.g. slots or frames - H04W 72/23: in the downlink direction of a wireless link, i.e. towards a terminal - H04L 5/0094: {Indication of how sub-channels of the path are allocated} - H04L 27/2607: {Cyclic extensions} - 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 Methods and apparatuses for information transmission and reception are provided. The method includes: determining a demodulation reference signal in a time-domain resource by a transmitting device at least according to the number of a part of symbols in the time-domain resource; wherein the number of symbols contained in the time-domain resource is less than or equal to the number of symbols contained in a slot or a subframe; and transmitting data information and the demodulation reference signal by the transmitting device to a receiving device by at least using the time-domain resource. ## Claims ### Claim 1 An apparatus for information transmission, comprising: a processor configured to determine a demodulation reference signal in a time-domain resource, wherein the number of symbols contained in the time-domain resource is less than or equal to the number of symbols contained in a slot or a subframe, wherein the number of symbols are occupied by the demodulation reference signal and positions where the symbols are located in the time-domain resource are determined by the processor circuitry according to a first parameter, a second parameters and a third parameter, where, the first parameter is the number of a part of symbols in the time-domain resource, the second parameter is a number parameter of the demodulation reference signal, and the third parameter denotes offset taking symbol as a unit; and a transmitter configured to transmit data information and the determined demodulation reference signal by at least using the time-domain resource to a receiving device. ### Claim 2 (depends on 1) The apparatus according to claim 1, wherein the time-domain resource comprises one or more symbols occupied by the data information and one or more symbols occupied by the demodulation reference signal. ### Claim 3 (depends on 2) The apparatus according to claim 2, wherein the time-domain resource further comprises at least one symbol used for automatic gain control and/or at least one symbol taken as a guard period. ### Claim 4 (depends on 1) The apparatus according to claim 1, wherein the time-domain resource is used for transmission or reception of sidelink information; and the number of a part of symbols in the time-domain resource is the number of symbols in the time-domain resource except at least one symbol used for automatic gain control and/or at least one symbol taken as a guard period. ### Claim 5 (depends on 1) The apparatus according to claim 1, wherein the number parameter of the demodulation reference signal is predefined, or is configured by a network device via one piece of the following information or signaling: a master information block, a system information block, radio resource control signaling, and downlink control information. ### Claim 6 (depends on 1) The apparatus according to claim 1, wherein for each combination of the first parameter and the second parameter, the third parameter is configured or determined independently, and the third parameter is greater than or equal to 0 and less than or equal to the number of symbols contained in the slot or the subframe. ### Claim 7 (depends on 4) The apparatus according to claim 4, wherein a sidelink time-domain resource comprises a plurality of consecutive uplink symbols; and in a case where a first symbol after the sidelink time-domain resources is a downlink symbol or a flexibly configured symbol, or a first symbol after the sidelink time-domain resources is an uplink symbol and the uplink symbol is not a sidelink time-domain resource, the sidelink time-domain resource comprises one or more symbols occupied by the data information and one or more symbols occupied by the demodulation reference signal, or comprises one or more symbols occupied by the data information, one or more symbols occupied by the demodulation reference signal and the at least one symbol used for automatic gain control. ### Claim 8 (depends on 4) The apparatus according to claim 4, wherein a plurality of sidelink time-domain resources occupy consecutive symbols in the time domain; a final sidelink time-domain resource comprises one or more symbols occupied by the data information, one or more symbols occupied by the demodulation reference signal, the at least one symbol used for automatic gain control and/or the at least one symbol taken as a guard period; and other sidelink time-domain resources comprise one or more symbols occupied by the data information and one or more symbols occupied by the demodulation reference signal, or comprises one or more symbols occupied by the data information, one or more symbols occupied by the demodulation reference signal and the at least one symbol used for automatic gain control. ### Claim 9 (depends on 1) The apparatus according to claim 1, wherein the processor circuitry is further configured to configure candidate time-domain resources in a plurality of slots or subframes. ### Claim 10 (depends on 9) The apparatus according to claim 9, wherein the candidate time-domain resources in the plurality of slots or subframes are determined according to a predefined rule, or are configured by a network device via one piece of the following information or signaling: a master information block, a system information block, radio resource control signaling, and downlink control information. ### Claim 11 (depends on 9) The apparatus according to claim 9, wherein the processor circuitry is configured to configure candidate time-domain resources in a starting slot or subframe via an initial time-domain resource indication and a first period parameter, or to configure candidate time-domain resources in a starting slot or subframe via a plurality of time-domain resource indications. ### Claim 12 (depends on 11) The apparatus according to claim 11, wherein the processor circuitry is further configured to obtain the candidate time-domain resources in the plurality of slots or subframes by repeating the starting slot or subframe with a period of subframe or slot. ### Claim 13 (depends on 9) The apparatus according to claim 9, wherein the processor circuitry is configured to configure the candidate time-domain resources in the plurality of slots or subframes via an initial time-domain resource indication and a second period parameter. ### Claim 14 (depends on 9) The apparatus according to claim 9, wherein the processor circuitry is further configured to determine time-domain resources in a plurality of slots or subframes from the candidate time-domain resources. ### Claim 15 (depends on 14) The apparatus according to claim 14, wherein the time-domain resources in the plurality of slots or subframes are determined by a transmitting device and a receiving device according to a predefined rule, or are determined by indicating to the transmitting device and/or the receiving device by a network device via a bitmap. ### Claim 16 (depends on 15) The apparatus according to claim 15, wherein the bitmap is configured by the network device via one piece of the following information or signaling: a master information block, a system information block, radio resource control signaling, and downlink control information. ### Claim 17 An apparatus for information reception, comprising: a receiver configured to receive data information and a demodulation reference signal transmitted by a transmitting device by at least using a time-domain resource; wherein, the demodulation reference signal is determined by the transmitting device, and the number of symbols contained in the time-domain resource is less than or equal to the number of symbols contained in a slot or a subframe; wherein the number of symbols occupied by the demodulation reference signal and positions where the symbols are located in the time-domain resource are determined according to a first parameter, a second parameter and a third parameter; and where, the first parameter is the number of a part of symbols in the time-domain resource, the second parameter is a number parameter of the demodulation reference signal, and the third parameter denotes offset taking symbol as a unit. ### Claim 18 A communication system, comprising: a transmitting device, comprising an apparatus for information transmission comprising processor circuitry configured to determine a demodulation reference signal in a time-domain resource, wherein the number of symbols contained in the time-domain resource is less than or equal to the number of symbols contained in a slot or a subframe, wherein the number of symbols are occupied by the demodulation reference signal and positions where the symbols are located in the time-domain resource are determined according to a first parameter, a second parameter and a third parameter, where, the first parameter is the number of a part of symbols in the time-domain resource, the second parameter is a number parameter of the demodulation reference signal, and the third parameter denotes offset taking symbol as a unit; and a transmitter configured to transmit data information and the determined demodulation reference signal to a receiving device by at least using the time-domain resource; and a receiving device, comprising a receiver configured to receive data information and the demodulation reference signal transmitted by the transmitting device by at least using the time-domain resource.