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WO2022077510A1 - Procédé de détermination de ressource pour signal de référence de démodulation (dmrs) et dispositif de communication - Google Patents

Procédé de détermination de ressource pour signal de référence de démodulation (dmrs) et dispositif de communication Download PDF

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Publication number
WO2022077510A1
WO2022077510A1 PCT/CN2020/121694 CN2020121694W WO2022077510A1 WO 2022077510 A1 WO2022077510 A1 WO 2022077510A1 CN 2020121694 W CN2020121694 W CN 2020121694W WO 2022077510 A1 WO2022077510 A1 WO 2022077510A1
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Prior art keywords
time domain
sub
domain resources
communication device
resource
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PCT/CN2020/121694
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English (en)
Chinese (zh)
Inventor
余雅威
郭志恒
谢信乾
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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Priority to CN202080106145.3A priority Critical patent/CN116368893A/zh
Priority to PCT/CN2020/121694 priority patent/WO2022077510A1/fr
Publication of WO2022077510A1 publication Critical patent/WO2022077510A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation

Definitions

  • the present application relates to the field of wireless communication, and in particular, to a resource determination method and a communication device for a demodulation reference signal DMRS.
  • 5G fifth-generation mobile communication technology
  • NR new radio
  • eMBB enhanced mobile broadband
  • URLLC ultra-reliability low-latency communication
  • mMTC massive machine-type communication
  • the sender usually sends the data repeatedly so that the receiver can obtain the combining gain, thereby improving the transmission quality of the data.
  • the current NR protocol specifies a type B (ie type B) repeated transmission mechanism, that is, in the process of L repeated transmissions, the starting time domain symbol position of the first repeated transmission in the L repeated transmissions will be used. Based on this, according to the number of time domain symbols required for each repeated transmission, L repeated transmission and transmission are performed on a plurality of consecutive time domain symbols.
  • the current NR protocol stipulates that if the time domain resources required for a certain repeated transmission (that is, all the time domain symbols occupied by this repeated transmission) are distributed in two different time slots, the two The time-domain resources corresponding to this repeated transmission are split into two sub-time-domain resources at the boundary of different time slots, and two repeated transmissions are performed on the two sub-time-domain resources respectively, and the split two repeated transmissions are performed.
  • the transfer block size remains unchanged.
  • the transmitting end allocates the time domain resources of the demodulation reference signal (DMRS) for the above-mentioned multiple repeated transmissions
  • DMRS demodulation reference signal
  • the time domain resource allocation of the DMRS is also performed directly on the above two sub-time domain resources.
  • the sub-time-domain resources are directly allocated to the time-domain resources of the DMRS, it is very likely that the number of time-domain resources of the DMRS to be finally allocated is too large or the location distribution is unreasonable, thereby reducing the frequency spectrum in the communication process.
  • Efficiency and channel estimation performance is very likely that the number of time-domain resources of the DMRS to be finally allocated is too large or the location distribution is unreasonable, thereby reducing the frequency spectrum in the communication process.
  • the present application provides a resource determination method and a communication device for a demodulation reference signal DMRS.
  • a resource determination method and a communication device for a demodulation reference signal DMRS With the method provided in the present application, it is possible to reduce or avoid the unreasonable allocation of the time domain resources of the DMRS caused by the allocation of the time domain resources of the DMRS to at least two sub-time domain resources included in a certain time domain resource. Improve the spectral efficiency and channel estimation performance in the communication process.
  • an embodiment of the present application provides a resource determination method for a demodulation reference signal DMRS.
  • the execution body of the method may be a first communication device, the first communication device may be a terminal device or a chip located in the terminal device, and the first communication device may be a network device or a chip located in the network device.
  • the first communication device determines a first time-domain resource, where the first time-domain resource includes at least two consecutive sub-time-domain resources, and the at least two sub-time-domain resources are time-domain resources in at least two adjacent first time units , and at least two sub-time domain resources are in one-to-one correspondence with at least two adjacent first time units.
  • the sum of the lengths of the at least two sub-time-domain resources is equal to the length of the first time-domain resources, where the length of the time-domain resources is the number of second time units included in the time-domain resources.
  • the first communication device determines the configuration of the time domain resources of the DMRS in the at least two sub-time domain resources according to the length of the first time domain resources.
  • the first communication device determines the configuration of the time domain resources of the DMRS on the at least two sub-time domain resources according to the length of the first time domain resource, which can avoid performing the time domain resources of the DMRS on the at least two sub-time domain resources respectively.
  • the configuration of may lead to a problem of excessive overhead caused by an excessive number of DMRSs on the first time domain resources, while ensuring that the distribution of DMRSs on the entire first time domain resources is relatively uniform.
  • the first time unit is a time slot
  • the second time unit is a time domain symbol
  • the first communication device determines the length of the first configuration resource and the second time domain resource.
  • the ratio of the lengths of the configuration resources is equal to or greater than a preset ratio, wherein the first configuration resources are time-domain resources of DMRSs in the at least two sub-time-domain resources determined according to the lengths of the at least two sub-time-domain resources, and the second configuration resources are The time domain resource of the DMRS in the at least two sub-time domain resources is determined according to the length of the first time domain resource. That is, after comparing the length of the first configuration resource with the length of the second configuration resource, the first communication device determines the time domain configuration resource for DMRS according to the length of the first time domain resource.
  • the first communication device determines that the ratio between the length of the first configuration resource and the length of the second configuration resource is less than a preset ratio, then the first communication device determines the length of the at least two sub-time domain resources respectively. Configuration of the time domain resources of the DMRS in the at least two sub-time domain resources.
  • the first communication device compares the length of the first configuration resource with the length of the second configuration resource, and when the ratio of the length of the first configuration resource to the length of the second configuration resource is equal to or greater than a preset ratio, that is, the first configuration
  • a preset ratio that is, the first configuration
  • configure the DMRS on the second configuration resource that is, determine the time domain of the DMRS on at least two sub-time domain resources according to the length of the first time domain resource
  • the allocation of resources is conducive to improving the spectral efficiency of transmission.
  • the first configuration resource is configured on the above, that is, the time domain resources of the DMRS in the at least two sub-time domain resources are respectively determined according to the lengths of the at least two sub-time domain resources, which has better compatibility with the prior art.
  • the first communication device may also determine at least two sub-time domain resources. includes at least one first sub-time domain resource, wherein the length of the first sub-time domain resource is less than or equal to the first threshold, or the transmission code rate corresponding to the first sub-time domain resource is equal to or greater than the preset transmission code rate.
  • the first communication device determines at least two sub-time domain resources respectively according to the length of the at least two sub-time domain resources.
  • the at least two sub-time domain resources do not include the first sub-time domain resource, and it can also be understood that the length of each sub-time domain resource in the at least two sub-time domain resources satisfies the transmission code greater than the first threshold or each sub-time domain resource.
  • the rate is less than the preset transmission code rate.
  • the at least two sub-time domain resources include the first sub-time domain resource
  • the first sub-time domain resource since the length of the first sub-time domain resource is relatively small, if the first sub-time domain resource is configured according to the length of the first sub-time domain resource
  • the DMRS on the domain resource will cause the first sub-time domain resource to use fewer resources for data transmission, so the actual transmission code rate will be higher, resulting in a higher probability of decoding failure at the receiving end.
  • the method is simple and easy to implement, It is beneficial to improve the transmission performance and improve the efficiency of the first communication device in determining the configuration of the time domain resources of the DMRS.
  • the first threshold is a preset value, or the first threshold is determined by the length of the first time domain resource.
  • the preset transmission code rate is a preset value, or the preset transmission code rate is determined by the length of the first time domain resource.
  • the first communication device before the first communication device determines the configuration of the time domain resources of the DMRS in the at least two sub-time domain resources according to the length of the first time domain resource, the first communication device also determines the DMRS corresponding to the first configuration resource.
  • the minimum interval is less than or equal to the preset interval, wherein the first configuration resource is the time domain resource of the DMRS in the at least two sub-time domain resources determined according to the lengths of the at least two sub-time domain resources, and the DMRS corresponding to the first configuration resource is the smallest
  • the interval is the offset of the second time unit between the two closest DMRSs among the at least two DMRSs carried on the first configuration resource.
  • the first communication device determines that the DMRS minimum interval is greater than the preset interval, and the first communication device determines the DMRS in the at least two sub-time domain resources according to the lengths of the at least two sub-time domain resources. configuration of time domain resources.
  • the first communication device is based on The configuration of the DMRS determined by the length of the first time domain resource can make the location distribution of the DMRS on the first time domain resource relatively uniform, which is beneficial to improve the accuracy of channel estimation at the receiving end.
  • the first communication device When the distance between the two closest DMRSs among the at least two DMRSs carried on the first configuration resource is not too close, or it is understood that the positions of the DMRSs carried on the first configuration resources are relatively uniform, the first communication device
  • the time-domain resources of the DMRS in the at least two sub-time-domain resources obtained are respectively determined according to the lengths of the at least two sub-time-domain resources, which has good compatibility with the prior art.
  • the first communication device before the first communication device determines the configuration of the time domain resources of the DMRS in the at least two sub-time domain resources according to the length of the first time domain resource, the first communication device receives the data from the second communication
  • the first indication information of the device is used to instruct the first communication device to perform the step of determining the configuration of the time domain resources of the DMRS in the at least two sub-time domain resources according to the length of the first time domain resources.
  • the first communication device determines the configuration of the time domain resources of the DMRS in the at least two sub-time domain resources according to the length of the first time domain resource, Signal at least twice on domain resources.
  • the first communication device After the first communication device determines the configuration of the time domain resources of the DMRS in the at least two sub-time domain resources according to the length of the first time domain resource, the first communication device passes through at least two sub-time domain resources according to preset transmission conditions.
  • the two sub-time domain resources perform signal transmission to the second communication device at least twice, wherein, any sub-time domain resource corresponds to one signal transmission, and the signal transmission on any sub-time domain resource uses the same transmit power, the same precoding and/or the same antenna port.
  • the signal transmission on any sub-time domain resource adopts the same transmit power, the same precoding and/or the same antenna port, which can ensure that the signal transmission on each sub-time domain resource adopts the same constraints, which is
  • the receiving end provides the possibility to perform joint channel estimation on the transmitted signals on each sub-time domain resource based on the total DMRS on each sub-time domain resource.
  • the first communication device determines the at least two sub-time domain resources. including at least one second sub-time domain resource, then the first communication device performs at least two signal transmissions to the second communication device through at least two sub-time domain resources respectively according to the preset transmission conditions, at least one second sub-time domain resource No DMRS is configured on each of the second sub-time domain resources in the above, any sub-time domain resource corresponds to one signal transmission, and the signal transmission on any sub-time domain resource adopts the same transmit power, the same precoding and/or or the same antenna port.
  • the receiving end cannot perform channel estimation on the sub-time domain resources that are not configured with DMRS. If the first communication device transmits signals on each sub-time domain resource according to preset transmission conditions, the receiving end may perform channel estimation based on all DMRSs on the first time-domain resource, so as to obtain the DMRS-unconfigured sub-time domain resources. Channel state information, which implements demodulation and decoding of the transmitted signal on the sub-time domain resources where DMRS is not configured.
  • the first communication device after the first communication device determines the configuration of the time domain resources of the DMRS in the at least two sub-time domain resources according to the length of the first time domain resource, the first communication device sends the information to the second communication device.
  • the communication device sends second indication information, where the second indication information is used to instruct the second communication device to determine, according to the length of the first time domain resource, the configuration of the time domain resources of the DMRS in the at least two sub-time domain resources.
  • the first communication device when the first communication device is the receiving end, after the first communication device determines the configuration of the time domain resources of the DMRS in the at least two sub-time domain resources according to the length of the first time domain resource, the first communication The device performs at least two signal receptions through the at least two sub-time domain resources.
  • the first communication device demodulates and decodes at least two signal receptions on at least two sub-time domain resources according to all DMRS on the first time domain resources.
  • the first communication device determines that no DMRS is configured on any sub-time domain resource in each sub-time domain resource, then the first communication device, according to all the DMRSs on the first time-domain resource, performs an update on the at least two time domain resources. Perform demodulation and decoding on at least two sub-time-domain resource receptions, that is, the first communication device determines the channel estimation result corresponding to the sub-time-domain resource configured with DMRS by performing for any of the sub-time-domain resources. The channel estimation result when the signal is received.
  • the transmitting end determines the DMRS configuration according to the length of the first time domain resource
  • the first communication device performs joint channel estimation based on all the DMRSs on the first time domain resource, and obtains channel state information on each sub-time domain resource of the first time domain resource, so as to realize the information on the sub-time domain resources that are not configured with DMRS.
  • the demodulation and decoding of the transmitted signal are not configured with DMRS.
  • the second communication device may also perform various methods in the method for determining the resources of the demodulation reference signal DMRS provided in the first aspect above.
  • a possible implementation manner is to cooperate with the first communication device to complete the sending or receiving of signals.
  • an embodiment of the present application provides an apparatus.
  • the device may be the first communication device itself, or may be an element or module such as a chip inside the first communication device.
  • the apparatus includes a unit for executing the DMRS resource determination method provided by any one of the possible implementations of the first aspect, so it can also achieve the beneficial effects of the DMRS resource determination method provided by the first aspect ( or advantage).
  • an embodiment of the present application provides a communication apparatus, and the communication apparatus may be a first communication device or at least one module or unit in the first communication device.
  • the communication device includes at least one memory and a processor.
  • the processor is used to call the code stored in the memory, so that the communication device executes the resource determination method of the DMRS provided by any one of the feasible implementations of the first aspect.
  • an embodiment of the present application provides a communication apparatus, and the communication apparatus may be a first communication device or at least one module or unit in the first communication device.
  • the communication device includes: at least one processor and an interface circuit.
  • the interface circuit is used to receive code instructions and transmit them to the processor.
  • the processor is used to run the above-mentioned code instructions to realize the resource determination method of the DMRS provided by any feasible implementation in the above-mentioned first aspect, and also can realize the beneficial effects possessed by the resource determination method of the DMRS provided by the above-mentioned first aspect ( or advantage).
  • an embodiment of the present application provides a computer-readable storage medium, where instructions are stored in the computer-readable storage medium, and when the instructions are run on a computer, any feasible implementation of the first aspect can be implemented
  • the DMRS resource determination method provided by the method can also achieve the beneficial effects (or advantages) of the DMRS resource determination method provided by the first aspect.
  • the embodiments of the present application provide a computer program product containing instructions, when the computer program product is run on a computer, the computer executes the DMRS resource determination method provided by the first aspect, and can also realize the first The beneficial effects of the DMRS resource determination method provided by the aspect.
  • an embodiment of the present application provides a communication system, where the communication system includes the first communication device and the second communication device described in at least one of the first aspects.
  • FIG. 1 is a schematic structural diagram of a communication system provided by an embodiment of the present application.
  • FIG. 2 is a schematic diagram of a time domain resource structure for repeated transmission under the existing type B provided by an embodiment of the present application;
  • FIG. 3 is a schematic flowchart of a method for determining a resource of a demodulation reference signal DMRS provided by an embodiment of the present application;
  • FIG. 4 is a schematic structural diagram of a first time domain resource provided by an embodiment of the present application.
  • FIG. 5 is another schematic flowchart of a method for determining a resource of a DMRS provided by an embodiment of the present application
  • FIG. 6 is another schematic flowchart of a method for determining a resource of a DMRS provided by an embodiment of the present application
  • FIG. 7 is another schematic flowchart of a method for determining a resource of a DMRS provided by an embodiment of the present application.
  • FIG. 8 is another schematic flowchart of a method for determining resources of a DMRS provided by an embodiment of the present application.
  • FIG. 9 is another schematic flowchart of a method for determining a resource of a DMRS provided by an embodiment of the present application.
  • FIG. 10 is another schematic flowchart of a method for determining a resource of a DMRS provided by an embodiment of the present application
  • FIG. 11 is a schematic structural diagram of a communication device provided by an embodiment of the present application.
  • FIG. 12 is another schematic structural diagram of a communication device provided by an embodiment of the present application.
  • the method for determining the resources of the demodulation reference signal DMRS can be applied to various communication systems, for example, MTC systems, code division multiple access (CDMA) systems, wideband code division multiple access ( wideband code division multiple access (WCDMA) system, general packet radio service (GPRS), long term evolution (LTE) system, LTE frequency division duplex (FDD) system, LTE time division Duplex (time division duplex, TDD), universal mobile telecommunication system (UMTS), worldwide interoperability for microwave access (WiMAX) communication system, fifth generation (5th generation, 5G) system Or new wireless (new radio, NR) and so on.
  • CDMA code division multiple access
  • WCDMA wideband code division multiple access
  • WCDMA wideband code division multiple access
  • GPRS general packet radio service
  • LTE long term evolution
  • LTE LTE frequency division duplex
  • FDD frequency division duplex
  • TDD time division duplex
  • UMTS universal mobile telecommunication system
  • WiMAX worldwide interoperability for microwave access
  • the method for determining the resource of the demodulation reference signal DMRS provided in the embodiment of the present application may be specifically performed by the first communication device and/or the second communication device.
  • the first communication device may be the sending end in the signal transmission process, and at this time, the second communication device is the receiving end.
  • the first communication device may be the receiving end in the process of signal transmission, and at this time, the second communication device is the transmitting end. It can be understood that, when the first communication device is a terminal device in the above-mentioned various communication systems, the above-mentioned second communication device is a network device in each communication system.
  • the above-mentioned second communication device is a terminal device in each communication system.
  • the above terminal equipment may specifically refer to user equipment, access terminal, subscriber unit, subscriber station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent or user equipment.
  • the terminal device may also be a cellular phone, a cordless phone, a session initiation protocol (SIP) phone, a wireless local loop (WLL) station, a personal digital assistant (PDA), a wireless communication Functional handheld devices, computing devices or other processing devices connected to wireless modems, in-vehicle devices, wearable devices, terminal devices in 5G networks or terminals in the future evolution of the public land mobile network (PLMN) equipment, etc., which are not limited in this embodiment of the present application.
  • the network device involved in the embodiments of the present application may be a device used for communicating with a terminal device, which may specifically be a global system of mobile communication (GSM) system or a code division multiple access (code division multiple access, CDMA) system.
  • GSM global system of mobile communication
  • CDMA code division multiple access
  • NodeB can also be a base station (NodeB, NB) in a wideband code division multiple access (WCDMA) system, or an evolved base station (evolutional nodeB) in an LTE system.
  • eNB or eNodeB it can also be a wireless controller in a cloud radio access network (CRAN) scenario, or the network device can be a relay station, an access point, an in-vehicle device, a wearable device, and a 5G network
  • CRAN cloud radio access network
  • the network equipment in the PLMN network or the network equipment in the future evolved PLMN network, etc., are not limited in the embodiments of the present application.
  • the length of a certain time domain resource refers to the number of second time units included in a certain time domain resource.
  • the second time unit is a unit for measuring or indicating the length of time domain resources.
  • the second time unit may be a time domain symbol.
  • the second time unit will be replaced by a time domain symbol for description hereinafter.
  • the so-called first time unit is also a unit for measuring or indicating the length of time domain resources, and a first time unit may include a preset number of second time units.
  • the above-mentioned first time unit may be a time slot.
  • one time slot may include 14 time domain symbols. One sort number for each time-domain symbol. The smaller the sequence number is, the earlier the time domain symbol is in the time slot. For example, the 1st time-domain symbol in a certain time slot is just before the 2nd time-domain symbol.
  • each time slot also corresponds to a time slot number to distinguish from each other. For the convenience of understanding, a time slot will be used instead of the second time unit for description hereinafter.
  • DMRS is a sequence known by the transceiver and mapped on time-frequency resources with known locations.
  • the transmitting end uses the same precoding and antenna port as the uplink transmission signal to send the DMRS. Since the DMRS and the uplink transmission signal experience the same fading channel, the receiving end can Based on the known DMRS sequence, the equivalent fading channel experienced by the uplink signal transmission is estimated, and the uplink data demodulation is completed based on the estimated equivalent channel state information.
  • DMRS needs to be configured for each uplink transmission.
  • DMRS parameters are configured through RRC signaling.
  • the DMRS parameters may include parameter fields as shown in Table 1-1.
  • Table 1-1 is an existing DMRS parameter table provided by this embodiment of the present application.
  • the parameters of the DMRS may include a type parameter DMRS-type, a maximum length parameter maxLength and a position parameter DMRS-additionalPosition.
  • the type parameter DMRS-type indicates the type of the DMRS, and can be selected as type 1 type1 and type 2 type2.
  • type1 indicates that the DMRS adopts the comb-shaped frequency division method of 2 groups of orthogonal codes. At this time, each group occupies 6 resource elements (Resource Element, RE) in the frequency domain; type2 indicates that the DMRS adopts the comb-shaped frequency division method. Three groups of orthogonal codes are grouped by the method. At this time, each group can use 4 REs in the frequency domain.
  • the maximum length parameter maxLength indicates the maximum number of consecutive time-domain symbols that can be occupied by the configured pre-DMRS, and the selectable values are single and double.
  • maxLength When the value of maxLength is single, it means that the pre-DMRS occupies one time domain symbol.
  • maxLength When the value of maxLength is double, it means that the pre-DMRS can occupy at most 2 consecutive time domain symbols. At this time, whether to occupy one time-domain symbol or two time-domain symbols can be further indicated by some fields in a message such as downlink control information (DCI).
  • DCI downlink control information
  • the position parameter DMRS-additionalPosition indicates the maximum number of additional DMRSs that can be configured in the current uplink transmission, and the number of time-domain symbols occupied by each additional DMRS is the same as that of the preceding DMRS. Its selectable values are Pos0, Pos1, Pos2, and Pos3.
  • the configuration of the pre-DMRS in uplink transmission is necessary. It can be understood that in addition to the pre-DMRS, Pos0, Pos1, Pos2, and Pos3 indicate that the maximum number of additional DMRSs that can be configured is 0, 1, 2, and 3, respectively. .
  • FIG. 1 is a schematic structural diagram of a communication system provided by an embodiment of the present application. It can be known from FIG. 1 that the communication system mainly includes a first communication device and a second communication device. The first communication device and the second communication device can communicate with each other.
  • the current NR protocol specifies a type B (that is, type B) repeated transmission mechanism, that is, during the L repeated transmission process, the L repeated Based on the starting time-domain symbol position of the first repeated transmission in the transmission, according to the number of time-domain symbols required for each repeated transmission, the transmission is performed on a plurality of consecutive time-domain symbols.
  • type B that is, type B
  • the time domain resource corresponding to this repeated transmission should be split into two sub-time domain resources according to the boundary of the two different time slots, and two repeated transmissions should be performed on the two sub-time domain resources respectively.
  • the transport block size remains the same for two repeated transmissions. Therefore, after a certain repeated transmission is split into two repeated transmissions according to the time slot boundary, when the transmitting end allocates the time domain resources of the DMRS for the above multiple repeated transmissions, it will also The time domain resources are allocated to the time domain resources of the DMRS respectively.
  • directly assigning the time domain resources of the DMRS to the two sub-time domain resources after splitting may lead to an excessive number or location of the time domain resources of the finally allocated DMRS.
  • FIG. 2 is a schematic diagram of a time domain resource structure of repetitive transmission under a conventional type B provided by an embodiment of the present application. As shown in Figure 2, it is assumed that 2 repeated transmissions are currently configured, each repeated transmission occupies 10 time domain symbols, and the starting time domain symbol position of the first repeated transmission T1 is the first time in time slot 2 Domain notation.
  • the time domain resources are configured according to the repeated transmission mechanism of type B, the first repeated transmission T1 in the configuration will occupy the first to tenth time domain symbols in the time slot 2, and the second repeated transmission in the configuration will occupy the first to tenth time domain symbols in the configuration.
  • T2' will occupy the 11th to 14th time-domain symbols in time slot 2, and the 1st to 6th time-domain symbols in time slot 3, respectively.
  • the configured second repeated transmission T2' will be split into the real second repeated transmission T2 and the third repeated transmission T3, and the second repeated transmission
  • the time domain resources occupied by T2' are also split into two sub-time domain resources occupied by the second repeated transmission T2 and the third repeated transmission T3.
  • the time-domain resources containing 10 time-domain symbols occupied by the second retransmission T2' will be split into sub-time-domain resources (including the sub-time domain resources occupied by the second repeated transmission T2) 11th to 14th time-domain symbols), and the sub-time-domain resources occupied by T3 (which includes the 1st to 6th time-domain symbols in slot 3) are repeatedly transmitted for the third time.
  • the location parameter corresponding to the additional DMRS is Pos1
  • the resource mapping rule under the mapping type B ie, mapping type B
  • PUSCH physical uplink shared channel
  • the sub-time domain resources corresponding to the second repeated transmission will be allocated The time domain resource of one DMRS, that is, the 11th time domain symbol in slot 2.
  • the sub-time domain resources corresponding to the third repeated transmission will be allocated two DMRS time-domain resources, that is, the first time-domain symbol and the fourth time-domain symbol in time slot 3 are used.
  • the sender will configure the time domain resources of the second repeated transmission T2' as a whole, so that the time domain resources of the second repeated transmission T2' will be equipped with two DMRS time domain resources, which are time slots respectively.
  • the allocation of the time-domain resources of the DMRS to the sub-time-domain resources after the splitting may make the time-domain of the DMRS obtained by the configuration.
  • the number of resources has increased, and the location distribution is not so uniform. Therefore, in the prior art, when a certain time-domain resource is divided into multiple sub-time-domain resources, the method of determining the DMRS time-domain resources for the divided sub-time-domain resources may not guarantee that each sub-time-domain resource is The time domain resources of the DMRS allocated on the resources are reasonable in quantity and location.
  • the technical problem to be solved by the embodiments of the present application is: how to reasonably allocate the time domain resources of the DMRS to a certain time domain resource including at least two sub-time domain resources.
  • FIG. 3 is a schematic flowchart of a method for determining a resource of a demodulation reference signal DMRS provided by an embodiment of the present application.
  • this embodiment will take a certain data transmission between the first communication device and the second communication device as an example to describe in detail the method for determining the time domain resources of the DMRS provided by the application. It can be seen from FIG. 3 that the method for determining the time domain resources of the DMRS provided by the embodiment of the present application includes the following steps:
  • the first communication device determines a first time domain resource.
  • the first communication device determines, according to the length of the first time domain resource, the configuration of the time domain resource of the DMRS in the at least two sub-time domain resources.
  • the first communication device may first determine the first time domain resource required for a data transmission between the first communication device and the second communication device.
  • the above-mentioned first time-domain resources may include at least two consecutive sub-time-domain resources, and the at least two sub-time-domain resources are inner time-domain resources of at least two adjacent first time units.
  • the at least two sub-time domain resources are in one-to-one correspondence with at least two adjacent first time units, and the sum of the lengths of the at least two sub-time domain resources will be equal to the length of the first time domain resources.
  • the above-mentioned first time unit may be a time slot, and each time slot includes 14 time domain symbols.
  • the length of the time domain resource can be understood as the number of time domain symbols.
  • the length of the first time domain resource may be less than or equal to 14 time domain symbols, that is, less than or equal to the length of one time slot, or greater than 14 time domain symbols, that is, greater than the length of one time slot.
  • the first time domain resource may include two sub-time domain resources, and the two sub-time domain resources may be located in two adjacent time slots, respectively.
  • the first time domain resource may include at least two sub-time domain resources, and the at least two sub-time domain resources may be respectively located in more than two adjacent time slots middle.
  • the first time unit is a time slot for detailed description.
  • FIG. 4 is a schematic structural diagram of a first time domain resource provided by an embodiment of the present application. As shown in FIG.
  • the above-mentioned first time domain resource includes adjacent sub-time domain resource 1 and sub-time domain resource 2, and sub-time domain resource 1 is included in time slot i, and sub-time domain resource 2 is included in time slot In i+1, the sum of the number of time-domain symbols included in sub-time-domain resource 1 and the number of time-domain resources included in sub-time-domain resource 2 is equal to the number of time-domain symbols included in the first time-domain resource number.
  • the first communication device when the above-mentioned first communication device is a network device, after the first communication device determines to perform a certain data transmission with the second communication device, the first communication device may utilize a preset time-domain resource scheduling algorithm and a current time-domain resource utilization The above-mentioned first time domain resource is determined from the available time domain resources between the first communication device and the second communication device.
  • the first communication device is a terminal device (in this case, the second communication device is a network device)
  • the first communication device can receive the resource configuration information for the first time domain resource sent by the second communication device, and The above-mentioned first time domain resource is determined according to the resource configuration information.
  • the second communication device will determine the above-mentioned first communication device from the available time domain resources between the first communication device and the second communication device according to the preset time domain resource scheduling algorithm and the current utilization of time domain resources. a time domain resource, regenerate resource configuration information corresponding to the first time domain resource, and send the resource configuration information to the first communication device.
  • step S20 after the first communication device determines the above-mentioned first time domain resource, it can directly perform DMRS time domain on the first time domain resource according to the length of the first time domain resource allocation of resources, thereby determining the configuration of the time domain resources of the DMRS in the at least two sub-time domain resources.
  • the configuration of the DMRS time-domain resources in each sub-time domain resource refers to the specific location of the DMRS time-domain resources in each sub-time domain resource.
  • the configuration of the DMRS time-domain resources in each sub-time domain resource refers to whether the DMRS time-domain resources in each sub-time domain resource exist and the specific location of the DMRS in the presence of the DMRS.
  • the first communication device can obtain the length of the first time domain resource and the position parameter DMRS-additionalPosition corresponding to the first time domain resource, that is, the additional DMRS
  • the maximum allowed number (for the convenience of description, the description will be replaced by the first maximum allowed number hereinafter).
  • the first maximum allowed number is the maximum number of additional DMRSs that can be carried on the first time domain resource. It should also be noted here that when the first communication device is a network device, the first communication device may determine the first maximum allowable number according to the length of the first time domain resource and the corresponding determination rule for the number of additional DMRSs .
  • the second communication device When the above-mentioned first communication device is a terminal device (the second communication device is a network device at this time), the second communication device first determines the number of additional DMRSs according to the length of the first time domain resource and the corresponding determination rule for the number of additional DMRSs. the first maximum allowed number, and then send the first maximum allowed number to the first communication device. After determining the first time domain resource, the first communication device determines the first maximum allowable number sent by the second communication device as the maximum number of additional DMRSs that can be carried on the first time domain resource.
  • the first communication device After the first communication device determines the length of the first time domain resource and the first maximum allowable number, it can also obtain the DMRS resource mapping set used for this data transmission. It should be noted here that the DMRS resource mapping set may include the length of one or more different values, the maximum allowable number of additional DMRSs with one or more different values, and the length and any value of any value.
  • the DMRS resource indication information corresponding to the maximum allowable number of additional DMRSs under a value.
  • the DMRS resource indication information corresponding to the maximum allowable number of DMRSs Pos1 is used to indicate the positions of the time domain resources occupied by the pre-DMRS and the additional DMRS in the time domain resources of length 1 d .
  • Table 1-2 is a DMRS resource mapping set provided by the embodiment of the present application. As shown in Table 1-2, the DMRS resource mapping set includes 14 lengths of 1, 2, . number.
  • DMRS resource indication information corresponding to different length values and different maximum allowable number values.
  • l 0 is the relative position between the time domain symbol occupied by the pre-DMRS and the first time domain symbol of the time domain resource of a certain length.
  • the mapping type of PUSCH is Type A (TypeA)
  • the number of time domain resources 1 d required for a single transmission is not less than 4 time domain symbols, and at this time 1 0 is 2 or 3 (specifically It can be determined by the first communication device itself, or configured by the second communication device for the first communication device).
  • mapping type of PUSCH is Type B (Type B)
  • transmission of any symbol length can be performed (that is, the length of the configured time domain resource ld can be less than 4).
  • the value of 1 0 is 0, that is to say The time domain symbol occupied by the pre-DMRS is the first time domain symbol in the to-be-configured time domain resource.
  • Table 1-2 is only an example of the DMRS resource mapping set provided by the embodiment of the present application. In practical applications, the length value in the DMRS resource mapping set provided by the embodiment of the present application may also be greater than 14 , and the value of the maximum allowable number of additional DMRSs may not be limited to Pos0, Pos1, Pos2 or Pos3.
  • the value of the maximum allowable number of additional DMRSs may also include Pos4, Pos5, and so on.
  • the DMRS resource mapping set provided in this embodiment of the present application may further include at least one length with a value greater than 14, at least one maximum number of additional DMRSs whose maximum number of corresponding indications is greater than 3, and at least one additional DMRS whose maximum number is greater than 3.
  • the first communication device After the first communication device obtains the DMRS resource mapping set used for this data transmission, the first communication device can look up the set of DMRS resource mappings according to the length of the first time domain resource and the first maximum allowable number by looking up a table.
  • the DMRS resource indication information corresponding to the first time domain resource, and the configuration of the DMRS time domain resource in the at least two sub-time domain resources is further determined according to the DMRS resource indication information corresponding to the first time domain resource. For example, with reference to the structure of the first time domain resource shown in FIG. 4 , the first communication device may determine that the length of the first time domain resource is 11.
  • the first communication device determines that the first maximum allowed number is Pos3, it can be found from Table 1-2 that the DMRS resource indication information corresponding to the first time domain resource is 1 0 , 3, 6, and 9. Assuming that the first communication device determines that l0 is 2, the first communication device may determine the third time domain symbol, the fourth time domain symbol, the seventh time domain symbol and the The tenth time domain symbol is the time domain resource of the DMRS corresponding to the first time domain resource. Further, the first communication device may determine the configuration of the DMRS resources of the sub-time domain resource 1 and the sub-time domain resource 2 according to the time domain resources of the DMRS corresponding to the first time domain resource.
  • the first communication device may determine that the third and fourth symbols in the sub-time-domain resource 1 are sub-time The time domain resource of the DMRS corresponding to domain resource 1. Since the sub-time domain resource 2 is composed of the last six time-domain symbols in the first time-domain resource, the first communication device can determine the second time-domain symbol and the fifth time-domain symbol in the sub-time domain resource 2 is the time domain resource of the DMRS corresponding to the sub-time domain resource 2.
  • FIG. 5 is another schematic flowchart of a DMRS resource determination method provided by an embodiment of the present application. As shown in FIG. 5 , before the step S20 , the method also includes the steps:
  • the first communication device determines that a ratio between the length of the first configuration resource and the length of the second configuration resource is equal to or greater than a preset ratio.
  • the first communication device may first determine the length of the first configuration resource and the length of the second configuration resource.
  • the first configuration resource is the time domain resource of the DMRS in the at least two sub-time domain resources determined by the first communication device according to the lengths of the at least two sub-resources, and can also be understood as the DMRS in the at least two sub-time domain resources at this time.
  • the configuration is determined by the first communication device based on the lengths of the respective sub-time domain resources.
  • the second configuration resource is the time domain resource of the DMRS in the at least two sub-time domain resources determined by the first communication device according to the length of the first time domain resource, which can also be understood as at least two sub-time domain resources at this time.
  • the configuration of the time domain resources of the DMRS in is determined by the first communication device based on the length of the first time domain resources.
  • the first communication device may independently determine the time domain resources of the DMRS in each sub-time domain resource based on the length of each sub-resource, and determine the time domain resource of the DMRS in each sub-time domain resource as the above-mentioned No. 1. Configure resources. The process of determining the first configuration resource by the first communication device is described below by taking the structure of the first time domain resource shown in FIG. 4 as an example. The first communication device may first obtain the length of the sub-time domain resource 1 and the above-mentioned first maximum allowable number.
  • the DMRS resource indication information corresponding to the sub-time domain resource 1 is determined from the DMRS resource mapping set adopted for this transmission, that is, according to the sub-time domain resource
  • the DMRS resource indication information corresponding to 1 determines the time domain resource of the DMRS corresponding to the sub-time domain resource 1.
  • the first communication device may also obtain the length of the sub-time domain resource 2 and the above-mentioned first maximum allowable number.
  • the DMRS resource indication information corresponding to the sub-time domain resource 2 is determined from the DMRS resource mapping set adopted for this transmission, that is, according to the sub-time domain resource
  • the DMRS resource indication information corresponding to 2 determines the time domain resource of the DMRS corresponding to the sub-time domain resource 2.
  • the first communication device may determine the time domain resources of the DMRS corresponding to the sub-time domain resource 1 and the sub-time domain resource 2 as the above-mentioned first configuration resource.
  • the first communication device can find from Table 1-2 that the DMRS resource indication information corresponding to sub-time domain resource 1 (its length is 5) is 10 . , 4. Assuming that the first communication device determines that l 0 is 2, the first communication device may determine that the third time domain symbol and the fifth time domain symbol in the sub-time domain resource 1 above are DMRS time domain resources. Similarly, the first communication device can also find from Table 1-2 that the DMRS resource indication information corresponding to sub-time domain resource 2 (whose length is 6) is also l 0 , 4.
  • the first communication device may determine that the third time domain symbol and the fifth time domain symbol in the above sub-time domain resource 2 are DMRS time domain resources. Then, the first communication device can determine that the above-mentioned first configuration resource is the third time domain symbol, the fifth time domain symbol in the sub-time domain resource 1, and the third time domain symbol in the sub-time domain resource 2, 5th time domain symbol.
  • the first communication device may further determine the time domain resource of the DMRS in the at least two sub-time domain resources according to the length of the first time domain resource, and determine the determined time domain resource of the DMRS as the above-mentioned second configuration resource.
  • the specific process of determining the time domain resources of the DMRS in the at least two sub-time domain resources by the first communication device according to the length of the first time domain resource reference may be made to determining at least two time domain resources according to the length of the first time domain resource described in the foregoing step S20. The process of the time domain resources of the DMRS in the sub-time domain resources will not be repeated here.
  • the first communication device may also calculate a ratio between the length of the first configuration resource and the length of the second configuration resource.
  • the first communication device may perform the above step S20.
  • the first communication device determining that the ratio between the length of the first configuration resource and the length of the second configuration resource is equal to or greater than the preset ratio can also be understood as a triggering condition for the first communication device to perform step S20.
  • the first communication device may respectively determine the configuration of the time domain resources of the DMRS in the at least two sub time domain resources according to the lengths of the at least two sub time domain resources.
  • FIG. 6 is another schematic flowchart of a DMRS resource determination method provided by an embodiment of the present application. As shown in FIG. 6 , before the step S20 , the method also includes the steps:
  • the first communication device determines that at least one first sub-time domain resource is included in the at least two sub-time domain resources.
  • the length of the first sub-time domain resource is less than or equal to the first threshold, or the transmission code rate corresponding to the first sub-time domain resource is equal to or greater than the preset transmission code rate.
  • the first communication device may first obtain the length of each sub-time domain resource in the at least two sub-time domain resources. Then, when the first communication device determines, according to the length of each sub-time domain resource, that there are sub-time domain resources whose length is less than the first threshold in the at least two sub-time domain resources, the first communication device determines that among the at least two sub-time domain resources If at least one first sub-time domain resource is included, the first communication device may perform the above S20. Alternatively, the first communication device may first obtain the transmission code rate corresponding to each sub-time domain resource in the at least two sub-time domain resources.
  • the first communication device determines, according to the length of each sub-time domain resource, that there is a sub-time domain resource with a transmission code rate equal to or greater than the preset transmission code rate in the at least two sub-time-domain resources, the first communication device determines that the at least two sub-time-domain resources above exist. If the two sub-time domain resources include at least one first sub-time domain resource, the first communication device may perform the foregoing step S20. In practical applications, the transmission code rate corresponding to each sub-time domain resource is determined by the transmission code rate obtained by the first communication device transmitting on the first time domain resource.
  • the size of the transport block transmitted on each sub-time-domain resource is equal to the size of the transport block transmitted on the first time-domain resource, but the length of each sub-time-domain resource is smaller than the length of the first time-domain resource. Therefore, the transmission code rate of each sub-time domain resource will be higher than the transmission code rate of the first time domain resource.
  • the first communication device can calculate and determine the transmission code rate on each sub-time domain resource. Here, when the number of time domain symbols occupied by the first sub-time domain resource is small, the transmission code rate on the first sub-time domain resource will be relatively high.
  • the first communication device is based on the length of the first sub-time domain resource Allocate DMRS time-domain resources to the first sub-time domain resources, and configure DMRS on other sub-time-domain resources based on other sub-time-domain resources in the first time-domain resources, which may cause the entire first time-domain resource.
  • the time-domain resource overhead of the DMRS on the resource is relatively large, thereby reducing the spectral efficiency of signal transmission.
  • the above-mentioned first threshold may be a preset fixed value, or may be related to the length of the first time domain resource.
  • the first threshold may be determined by the length of the first time domain resource.
  • the corresponding first thresholds are different.
  • a first time domain resource satisfying a first length range corresponds to a first threshold
  • a first time domain resource satisfying a second length range corresponds to another first threshold.
  • the preset transmission code rate may be a preset fixed value, or may be related to the length of the first time domain resource.
  • the preset transmission code rate is determined by the length of the first time domain resource, and when the length of the first time domain resource is different, the corresponding first threshold is different.
  • the first time domain resource satisfying the first length range corresponds to one preset transmission code rate
  • the first time domain resource satisfying the second length range corresponds to another preset transmission code rate.
  • the first threshold or the preset transmission code rate may also be obtained by multiplying the length of the first time domain resource by a preset scaling factor.
  • FIG. 7 is another schematic flowchart of a DMRS resource determination method provided by an embodiment of the present application. As shown in FIG. 7 , before the step S20 , the method also includes the steps:
  • the first communication device determines that the minimum interval of the DMRS corresponding to the first configuration resource is less than or equal to a preset interval.
  • the first communication device may first determine the time domain resources of the DMRS in the obtained at least two sub-time domain resources according to the lengths of the at least two sub-time domain resources, so as to obtain the above-mentioned first configuration resource. For the specific process, reference may be made to the foregoing process of the first communication device determining the first configuration resource, which will not be repeated here. Then, the first communication device may determine the minimum DMRS interval corresponding to the first configuration resource.
  • the minimum DMRS interval corresponding to the first configuration resource is the offset of the time domain symbols between the two closest DMRSs among the at least two DMRSs carried on the first configuration resource (that is, the offset second time number of units).
  • the first communication device may perform the foregoing step S20. If the first communication device determines that the minimum interval of the DMRS corresponding to the first configuration resource is greater than the preset interval, the configuration of the time domain resources of the DMRS in the obtained at least two sub-time domain resources may be determined according to the lengths of the at least two sub-time domain resources, respectively, That is, the above-mentioned first configuration resource is determined as the time domain resource of the DMRS in the at least two sub-time domain resources.
  • the first communication device may also send second indication information to the second communication device.
  • the second indication information is used to instruct the first communication device to determine, according to the length of the first time domain resource, the configuration of the time domain resources of the DMRS in the at least two sub-time domain resources.
  • the first communication device when it determines through the foregoing steps S101, S102 or S103 that DMRSs of at least two sub-time domain resources need to be configured based on the length of the first time domain resource, it can send a second indication to the second communication device information to notify the second communication device to determine the DMRS configuration of at least two sub-time domain resources in the first time domain resource in the same way, that is, at this time, the first communication device sends a second indication, which is used to notify the first communication device Two communication devices The first communication device determines the configuration of the time domain resources of the DMRS in at least two sub-time domain resources according to the length of the first time domain resources, and the second communication device receives the second indication information.
  • the length of determines the DMRS configuration on the first time domain resource.
  • the first communication device does not perform the above step S20, or it is understood that the first communication device determines the DMRS configuration of each sub-time domain resource according to the length of each sub-time domain resource, the first communication device does not send the second indication information.
  • the presence or absence of the second indication information can be used to notify the second communication device to learn the DMRS configuration of the first communication device.
  • different values of the second indication information may indicate different DMRS configurations. For example, in the first three optional implementations, when the first communication device determines to perform step S20, the first communication The device may send the second indication information under the first value to the second communication device.
  • the second indication information under the first value is used to instruct the second communication device to determine, according to the length of the first time domain resource, the configuration of the time domain resource of the DMRS in the at least two sub-time domain resources.
  • the first communication device may send the second indication information under the second value to the second communication device.
  • the second indication information under the second value is used to instruct the second communication device to determine the time-domain resource of the DMRS for each sub-time-domain resource according to the length of each sub-time-domain resource.
  • FIG. 8 is another schematic flowchart of a DMRS resource determination method provided by an embodiment of the present application. As shown in FIG. 8 , before the step S20 , the method also includes the steps:
  • the first communication device receives the first indication information from the second communication device.
  • the second communication device when it determines in the manner described in the above steps S101, S102 or S103 that it needs to determine the configuration of the time domain resources of the DMRS in the at least two sub-time domain resources according to the length of the first time domain resources Afterwards, it may send a fixed value of first indication information to the first communication device.
  • the first indication information may be used to instruct the first communication device to perform the above step S20. That is, after the first communication device determines that it has received the above-mentioned first indication information, it can directly execute the above-mentioned step S20, and the above-mentioned fixed value can also be understood as that when the first communication device receives the first indication information, the above-mentioned steps are executed.
  • the first communication device does not receive the first indication information, the first communication device does not perform the above step S20, and the presence or absence of the first indication information is used to notify the first terminal device whether to perform the step S20.
  • different values of the second indication information may indicate different DMRS configurations, and when the second communication device determines in the manner described in steps S101, S102 or S103 above, the at least one time domain resource needs to be determined according to the length of the first time domain resource.
  • the time domain resources of the DMRS in the two sub-time domain resources are configured, it may send a first indication information of a third value to the first communication device.
  • the first indication information of the third value may be used to instruct the first communication device to perform the above step S20.
  • the second communication device determines the configuration of the time domain resources of the DMRS in the at least two sub-time domain resources according to the lengths of the at least two sub-time domain resources in the manner described in the above steps S101, S102 or S103, it can send the A communication device sends first indication information of a fourth value.
  • the first indication information of the fourth value may be used to instruct the first communication device to respectively determine the configuration of the time domain resources of the DMRS in the at least two sub-time domain resources according to the lengths of the at least two sub-time domain resources. That is, when the first communication device determines that it has received the above-mentioned first indication information, and the value of the first indication information is the third value, the above-mentioned step S20 may be directly performed.
  • At least two sub-time domain resources can be determined respectively according to the lengths of the at least two sub-time domain resources Configuration of time domain resources in DMRS.
  • the second communication device instructs the first communication device whether to perform the above step S20 through the first indication information, which can save the processing capability of the first communication device.
  • FIG. 9 is another schematic flowchart of a DMRS resource determination method provided by an embodiment of the present application.
  • the first communication device when the first communication device is the data sender In this case, after the first communication device determines the configuration of the time domain resources of the DMRS in the at least two sub-time domain resources, the first communication device may further perform the steps:
  • the first communication device performs at least two signal transmissions to the second communication device through the at least two sub-time domain resources respectively according to the preset transmission condition.
  • the above-mentioned preset transmission conditions include: the same transmit power, the same precoding and/or the same antenna port.
  • the first communication device determines the configuration of the time domain resources of the DMRS in the at least two sub-time domain resources, it can respectively configure the time domain resources of the DMRS in the at least two sub-time domain resources according to the configuration of the time domain resources of the DMRS. At least two sub-time domain resources are configured for DMRS.
  • the first communication device may communicate with the second communication device through the at least two sub-time domain resources respectively according to preset transmission conditions
  • the device makes at least two signal transmissions. That is, when the first communication device performs at least two signal transmissions on at least two sub-time domain resources, at least one of transmit power, precoding, or antenna port used for any signal transmission is the same.
  • the first communication device determines the DMRS configuration in the at least two sub-time domain resources based on the length of the first time-domain resource, that is, the above-mentioned preset transmission condition is used to perform signal transmission on the at least two sub-time domain resources, No additional constraints are required on any of the sub-time domain resources.
  • the first communication device may send data to the second communication device at least twice through the at least two sub-time domain resources respectively according to the preset sending conditions.
  • the at least one second sub-time domain resource should satisfy that no DMRS is configured on each second sub-time domain resource, that is, the first communication device determines that at least one sub-time domain resource does not exist in the first time domain resource During DMRS, the first communication device sends signals to the second communication device at least twice through at least two sub-time domain resources respectively according to preset transmission conditions. That is, when the first communication device performs at least two signal transmissions on at least two sub-time domain resources, at least one of transmit power, precoding, or antenna port used for any signal transmission is the same.
  • the first communication device determines the DMRS configuration in at least two sub-time domain resources based on the length of the first time-domain resource, it needs to determine whether there is a sub-time domain resource without DMRS configured in each sub-time domain resource, If there is no DMRS configured on at least one sub-time domain resource, the first communication device performs signal transmission on at least two sub-time domain resources by using the foregoing preset sending condition.
  • the receiving end when the signal transmission on at least two sub-time domain resources satisfies the above preset conditions, it can be guaranteed that the receiving end, after receiving the signal transmission on the at least two sub-time domain resources, will All DMRSs on the time domain resources perform channel estimation on all signal transmissions on at least two sub-time domain resources to obtain channel fading information of all signal transmissions, so as to demodulate and decode the signal transmissions on each sub-time domain resource .
  • FIG. 10 is another schematic flowchart of a DMRS resource determination method provided by an embodiment of the present application. As shown in FIG. 10 , in the case where the first communication device is the receiver Next, after the first communication device determines the configuration of the time domain resources of the DMRS in the at least two sub-time domain resources, the first communication device may further perform the steps:
  • the first communication device demodulates and decodes the signal transmission on at least two sub-time domain resources according to all DMRS on the first time domain resource.
  • the first communication device when the first communication device is the receiver, after the first communication device determines the configuration of the time domain resources of the DMRS in the at least two sub-time domain resources, the first communication device The communication device may perform at least two signal receptions based on at least two sub-time domain resources. During the process of the first communication device performing at least two signal receptions according to the at least two sub-time domain resources, the first communication device may perform joint channel estimation on the at least two signal receptions.
  • the first communication device may perform joint channel estimation according to all DMRSs on at least two sub-time-domain resources to obtain channel state information on the entire first time-domain resource,
  • the channel state information is used as the channel state information of any sub-time domain resource, so as to demodulate and decode the signal on any sub-time domain resource.
  • the first communication device when the first communication device determines that there is a sub-time domain resource for which DMRS is not configured in at least one sub-time domain resource, the first communication device only uses all DMRS on the first time-domain resource , demodulate and decode the signal transmission on at least two sub-time domain resources. At this time, the first communication device may use the channel estimation result on the sub-time domain resource configured with DMRS as the channel state information of the sub-time domain resource not configured with DMRS, so as to realize the information on the sub-time domain resource not configured with DMRS. The signal is demodulated and decoded.
  • the first communication device cannot perform channel estimation on the sub-time domain resource, and thus cannot obtain the sub-time domain resource.
  • Channel state information so that the signal on the sub-time domain resource cannot be demodulated and decoded. Based on this, the first communication device can obtain the channel on the entire first time domain resource based on the DMRS on the entire first time domain resource.
  • the first communication device performs channel estimation based on the DMRS on the sub-time domain resources where the DMRS is configured, and obtains the channel state information on the sub-time domain resources where the DMRS is not configured, so as to obtain the channel state information on the sub-time domain resources where the DMRS is not configured.
  • the signal on the domain resource is demodulated and decoded.
  • the premise that the first communication device can perform step S40 is that the second communication device, as a sender, will communicate with the first communication device to the first communication device through the at least two sub-time domain resources according to the preset sending conditions described above and respectively.
  • the device makes at least two signal transmissions.
  • the provided DMRS resource determination method determines the configuration of the time domain resources of the DMRS in at least two sub-time domain resources in the first time domain resource, and further performs the configuration of the DMRS on the at least two sub-time domain resources, so as to realize the subsequent signal transmission.
  • the second communication device also needs to use the DMRS resource determination method provided by this application to determine the configuration of the time domain resources of the DMRS in at least two sub-time domain resources in the first time domain resources, and further based on the at least two sub-time domain resources The configuration of the time domain resources of the DMRS in the time domain resources realizes signal reception.
  • the second communication device needs to use the DMRS resource determination method provided by this application to determine at least two sub-times in the first time domain resource.
  • the time domain resources of the DMRS in the domain resources are configured, and the DMRS configuration is further performed on the at least two sub-time domain resources, so as to realize subsequent signal transmission.
  • the first communication device also needs to use the DMRS resource determination method provided by the present application to determine the configuration of the time domain resources of the DMRS in at least two sub-time domain resources in the first time domain resources, and further based on the at least two sub-time domain resources
  • the configuration of the time domain resources of the DMRS in the time domain resources realizes signal reception.
  • the foregoing description only takes the first communication device as the execution subject to describe in detail the configuration process of the first communication device to determine the time domain resources of the DMRS in the at least two sub-time domain resources.
  • the configuration process of the domain resources is the same as the process performed by the first communication device, and the present application will not repeat the description of the configuration process of the second communication device to determine the time domain resources of the DMRS in the at least two sub-time domain resources.
  • this time of data transmission may be a certain uplink or downlink repeated transmission during L times of uplink or downlink repeated transmissions performed between the first communication device and the second communication device.
  • the data transmission this time may also be another uplink or downlink data transmission process between the first communication device and the second communication device except repeated transmission, which is not specifically limited in this application.
  • the objects to be transmitted may be PUSCH, physical uplink control channel (PUCCH), physical downlink shared channel (physical dowmlink shared channel,
  • PUCCH physical downlink control channel
  • the data on any one of the channels such as PDSCH) or physical downlink control channel (physical downlink control channel, PDCCH) is not specifically limited in this application.
  • the first communication device may directly determine the at least two sub-time domain resources according to the length of the first time domain resource
  • the configuration of the time domain resources of the DMRS in the domain resources can reduce or avoid the unreasonable allocation of the time domain resources of the DMRS caused by the allocation of the time domain resources of the DMRS for at least two sub-time domain resources included in a certain time domain resource. Therefore, the spectral efficiency and channel estimation performance in the communication process are improved.
  • FIG. 11 is a schematic structural diagram of a communication device provided by an embodiment of the present application.
  • the communication apparatus can be used to execute the function of the first communication device in the above-mentioned first embodiment.
  • the communication apparatus may be the first communication device itself, or may be a unit or module inside the first communication device.
  • the communication device includes a processor, a memory, a radio frequency circuit, an antenna, and an input and output device.
  • the processor is mainly used to process the communication protocol and communication data, control the device, execute the software program, process the data of the software program, and the like.
  • the memory is mainly used to store software programs and data.
  • the radio frequency circuit is mainly used for the conversion of the baseband signal and the radio frequency signal and the processing of the radio frequency signal.
  • Antennas are mainly used to send and receive radio frequency signals in the form of electromagnetic waves.
  • Input and output devices such as a touch screen, a display screen, a keyboard, etc., are mainly used for receiving data input by a user using the device and outputting data to the user. It should be noted that, in some scenarios, the device may not include an input and output device.
  • the processor When data needs to be sent, the processor performs baseband processing on the data to be sent, and outputs the baseband signal to the radio frequency circuit.
  • the radio frequency circuit performs radio frequency processing on the baseband signal and sends the radio frequency signal through the antenna in the form of electromagnetic waves.
  • the radio frequency circuit receives the radio frequency signal through the antenna, converts the radio frequency signal into a baseband signal, and outputs the baseband signal to the processor, which converts the baseband signal into data and processes the data.
  • FIG. 11 only one memory and processor are shown in FIG. 11 . In an actual device product, there may be one or more processors and one or more memories.
  • the memory may also be referred to as a storage medium or a storage device or the like.
  • the memory may be set independently of the processor, or may be integrated with the processor, which is not limited in this embodiment of the present application.
  • the antenna and the radio frequency circuit with a transceiver function can be regarded as a transceiver unit of the communication device, and the processor with a processing function can be regarded as a processing unit of the communication device.
  • the communication device includes a transceiver unit 111 and a processing unit 112 .
  • the device for implementing the receiving function in the transceiver unit 111 may be regarded as a receiving unit
  • the device for implementing the transmitting function in the transceiver unit 111 may be regarded as a transmitting unit, that is, the transceiver unit 111 includes a receiving unit and a transmitting unit.
  • the receiving unit may also be sometimes referred to as a receiver, a receiver, or a receiving circuit or the like.
  • the transmitting unit may also sometimes be referred to as a transmitter, a transmitter, or a transmitting circuit, or the like.
  • processing unit 112 is configured to perform the configuration step of determining the time domain resource of the DMRS in the at least two sub-time domain resources according to the length of the first time domain resource described in step S20 in the first embodiment.
  • the transceiver unit 111 may be configured to perform the step of receiving the first indication information described in step S104 or according to the step of sending the second indication information in step S103.
  • the processing unit 112 is configured to determine a first time-domain resource, where the first time-domain resource includes at least two consecutive sub-time-domain resources, and the at least two sub-time-domain resources are at least Time domain resources in two adjacent first time units, and the at least two sub-time domain resources are in one-to-one correspondence with the at least two adjacent first time units, and the at least two sub-time domain resources are in one-to-one correspondence.
  • the sum of the lengths is equal to the length of the first time domain resource.
  • the processing unit 112 is further configured to determine, according to the length of the first time domain resource, the configuration of the time domain resource of the DMRS in the at least two sub-time domain resources.
  • the processing unit 112 is further configured to determine that a ratio between the length of the first configuration resource and the length in the second configuration resource is equal to or greater than a preset ratio.
  • the first configuration resource is the time domain resource of the DMRS in the at least two sub-time domain resources determined according to the lengths of the at least two sub-time domain resources
  • the second configuration resource is determined according to the length of the at least two sub-time domain resources. The time domain resource of the DMRS in the at least two sub-time domain resources determined by the length of the time domain resource.
  • the processing unit 112 is further configured to, if it is determined that the ratio between the length of the first configuration resource and the length of the second configuration resource is smaller than the preset ratio, according to the The lengths of the at least two sub-time domain resources respectively determine the configuration of the time domain resources of the DMRS in the at least two sub-time domain resources.
  • the processing unit 112 is further configured to determine that the at least two sub-time domain resources include at least one first sub-time domain resource. Wherein, the length of the first sub-time domain resource is less than or equal to the first threshold, or the transmission code rate corresponding to the first sub-time domain resource is equal to or greater than the preset transmission code rate.
  • the first threshold is determined by the length of the first time domain resource.
  • the processing unit 112 is further configured to, if it is determined that the at least two sub-time domain resources do not include the first sub-time domain resource, according to the at least two sub-time domain resources The lengths respectively determine the configuration of the time domain resources of the DMRS in the at least two sub-time domain resources.
  • the processing unit 112 is further configured to determine that the minimum DMRS interval corresponding to the first configuration resource is less than or equal to a preset interval.
  • the first configuration resource is a time domain resource of DMRS in the at least two sub-time domain resources determined according to the lengths of the at least two sub-time domain resources, and the minimum interval of DMRS corresponding to the first configuration resource is: The offset of the second time unit between the two closest DMRSs among the at least two DMRSs carried on the first configuration resource.
  • the processing unit 112 is further configured to: if it is determined that the minimum interval of the DMRS is greater than the preset interval, determine the at least two sub-time domain resources respectively according to the length of the at least two sub-time domain resources. Configuration of the time domain resources of the DMRS in the sub-time domain resources.
  • the transceiver unit 111 is configured to receive the first indication information from the second communication device.
  • the processing unit 112 is further configured to, after determining that the first indication information is received, determine to execute the configuration of the time domain resource of the DMRS in the at least two sub-time domain resources according to the length of the first time domain resource. step.
  • the transceiver unit 111 is further configured to perform at least two signal transmissions to the second communication device through the at least two sub-time domain resources respectively according to preset transmission conditions.
  • any sub-time domain resource is used for any signal transmission
  • the preset transmission conditions include at least one of the following: the transmission power used for each signal transmission is the same, the precoding used for each signal transmission is the same, the The same antenna ports are used for secondary signal transmission.
  • the processing unit 112 is further configured to, if it is determined that the at least two sub-time domain resources include at least one second sub-time domain resource, control the transmitting and receiving unit 111 according to a preset sending condition and performing at least two signal transmissions to the second communication device through the at least two sub-time domain resources respectively.
  • each second sub-time domain resource in the at least one second sub-time domain resource is not configured with DMRS, any sub-time domain resource is used for any signal transmission
  • the preset transmission condition includes at least one of the following Item: the same transmit power is used for each signal transmission, the same precoding is used for each signal transmission, and the same antenna port is used for each signal transmission.
  • the transceiving unit 111 is configured to send second indication information to the second communication device, wherein the second indication information is used to instruct the second communication device according to the first time
  • the length of the domain resources determines the configuration of the time domain resources of the DMRS in the at least two sub-time domain resources.
  • the processing unit 112 is further configured to, if it is determined that any sub-time domain resource in the sub-time domain resources is not configured with a DMRS, to The channel estimation result determines the channel estimation result when the signal is received for any of the sub-time domain resources.
  • the first time unit is a time slot
  • the second time unit is a time domain symbol
  • FIG. 12 is another schematic structural diagram of a communication device provided by an embodiment of the present application.
  • the communication apparatus may be the first communication device in Embodiment 1, and may be configured to implement the method for determining DMRS resources implemented by the first communication device in the foregoing Embodiment 1.
  • the communication device includes: a processor 121 , a memory 122 , a transceiver 123 and a bus system 124 .
  • the memory 121 includes but is not limited to RAM, ROM, EPROM or CD-ROM, and the memory 121 is used for storing related instructions and data.
  • the memory 121 stores the following elements, executable modules or data structures, or a subset thereof, or an extended set of them:
  • Operation instructions including various operation instructions, which are used to realize various operations.
  • Operating System Includes various system programs for implementing various basic services and handling hardware-based tasks.
  • the transceiver 123 may be a communication module, a transceiver circuit. Application In this embodiment of the present application, the transceiver 123 is configured to perform the process of receiving the first indication information or sending the second indication information involved in the first embodiment.
  • the processor 121 may be a controller, CPU, general purpose processor, DSP, ASIC, FPGA or other programmable logic device, transistor logic device, hardware component or any combination thereof. It may implement or execute various exemplary logical blocks, modules and circuits described in connection with the disclosure of the embodiments of this application.
  • the processor 121 may also be a combination that implements computing functions, such as a combination of one or more microprocessors, a combination of a DSP and a microprocessor, and the like.
  • bus system 124 various components of the device are coupled together through a bus system 124, where the bus system 124 may include a power bus, a control bus, a status signal bus, and the like in addition to a data bus.
  • bus system 124 may include a power bus, a control bus, a status signal bus, and the like in addition to a data bus.
  • bus system 124 may include a power bus, a control bus, a status signal bus, and the like in addition to a data bus.
  • bus system 124 may include a power bus, a control bus, a status signal bus, and the like in addition to a data bus.
  • bus system 124 may include a power bus, a control bus, a status signal bus, and the like in addition to a data bus.
  • the various buses are labeled as bus system 124 in Figure 12.
  • FIG. 12 For convenience of representation, only a schematic drawing is shown in FIG. 12 .
  • the second communication device may also execute the demodulation reference signal DMRS as executed by the first communication device.
  • the apparatus shown in FIG. 11 or FIG. 12 may also be the above-mentioned second communication device.
  • the apparatus shown in FIG. 11 or FIG. 12 can also act as the second communication device to perform various possible functions in the resource determination method for the demodulation reference signal DMRS as performed by the first communication device.
  • the processor in this embodiment of the present application may be an integrated circuit chip, which has a signal processing capability.
  • each step of the above method embodiments may be completed by a hardware integrated logic circuit in a processor or an instruction in the form of software.
  • the above-mentioned processor can be a general-purpose processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), an off-the-shelf programmable gate array (field programmable gate array, FPGA) or other Programming logic devices, discrete gate or transistor logic devices, discrete hardware components.
  • DSP digital signal processor
  • ASIC application specific integrated circuit
  • FPGA field programmable gate array
  • Programming logic devices discrete gate or transistor logic devices, discrete hardware components.
  • the memory in this embodiment of the present application may be a volatile memory or a non-volatile memory, or may include both volatile and non-volatile memory.
  • the non-volatile memory may be read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically programmable Erase programmable read-only memory (electrically EPROM, EEPROM) or flash memory.
  • Volatile memory may be random access memory (RAM), which acts as an external cache.
  • RAM random access memory
  • DRAM dynamic random access memory
  • SDRAM synchronous DRAM
  • SDRAM double data rate synchronous dynamic random access memory
  • ESDRAM enhanced synchronous dynamic random access memory
  • SLDRAM synchronous link dynamic random access memory
  • direct rambus RAM direct rambus RAM
  • Embodiments of the present application further provide a computer-readable medium on which a computer program is stored, and when the computer program is executed by a computer, implements the methods or steps performed by the first communication device in the above-mentioned first embodiment.
  • An embodiment of the present application further provides a computer program product, which implements the method or step performed by the first communication device in the first embodiment above when the computer program product is executed by a computer.
  • An embodiment of the present application further provides a communication apparatus, and the communication apparatus may be the first communication device in Embodiment 1, or may be at least one module or unit in the first communication device.
  • the communication device includes at least one processor and an interface.
  • the processor is configured to execute the method or step executed by the first communication device in the first embodiment.
  • the above-mentioned apparatus may be a chip, and the above-mentioned processor may be implemented by hardware or software.
  • the processor When implemented by hardware, the processor may be a logic circuit, an integrated circuit, or the like.
  • the processor can be a general-purpose processor, which can be implemented by reading software codes stored in the memory, and the memory can be integrated in the processor, and can be located outside the processor and exist independently.
  • the foregoing method embodiments may be implemented in whole or in part by software, hardware, firmware, or any combination thereof.
  • software When implemented in software, it can be implemented in whole or in part in the form of a computer program product.
  • the computer program product described above includes one or more computer instructions. When the above-mentioned computer instructions are loaded and executed on the computer, all or part of the above-mentioned processes or functions according to the embodiments of the present application are generated.
  • the aforementioned computer may be a general purpose computer, a special purpose computer, a computer network, or other programmable devices.
  • the above-mentioned computer instructions may be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the above-mentioned computer instructions may be transmitted from a website site, computer, server or data center via wired communication. (e.g. coaxial cable, fiber optic, digital subscriber Line (DSL) or wireless (e.g. infrared, wireless, microwave, etc.) to another website site, computer, server or data center.
  • the above computer readable storage The medium can be any available medium that can be accessed by a computer or a data storage device that contains one or more of the available media integration servers, data centers, etc.
  • the aforementioned available media can be magnetic media (eg, floppy disks, hard disks, magnetic tapes), optical media (For example, a high-density digital video disc (DVD), or a semiconductor medium (for example, a solid state disk (SSD), etc.).
  • magnetic media eg, floppy disks, hard disks, magnetic tapes
  • optical media For example, a high-density digital video disc (DVD), or a semiconductor medium (for example, a solid state disk (SSD), etc.
  • SSD solid state disk
  • system and “network” in the embodiments of the present application can often be used interchangeably.
  • the term “and/or” in this embodiment is only an association relationship to describe associated objects, indicating that there can be three kinds of relationships, for example, A and/or B, it can mean that A exists alone, A and B exist at the same time, There are three cases of B alone.
  • the character "/" in this document generally indicates that the related objects are an "or” relationship.
  • the disclosed systems, devices and methods may be implemented in other manners.
  • the apparatus described above is only illustrative.
  • the division of units is only a logical function division. In actual implementation, there may be other division methods.
  • multiple units or components may be combined or integrated into another A system, or some feature, can be ignored, or not implemented.
  • the shown or discussed mutual coupling or direct coupling or communication connection may be indirect coupling or communication connection through some interfaces, devices or units, and may also be electrical, mechanical or other forms of connection.
  • each functional unit in the embodiments of the present application may be integrated into one processing unit, or each unit may exist physically alone, or two or more units may be integrated into one unit.
  • the above-mentioned integrated units may be implemented in the form of hardware, or may be implemented in the form of software functional units.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

Des modes de réalisation de la présente demande concernent un procédé de détermination de ressource pour un signal de référence de démodulation (DMRS) et un dispositif de communication. Le procédé consiste à : déterminer une première ressource de domaine temporel, la première ressource de domaine temporel comprenant au moins deux sous-ressources de domaine temporel consécutives, lesdites au moins deux sous-ressources de domaine temporel étant des ressources de domaine temporel dans au moins deux premières unités temporelles adjacentes, lesdites au moins deux sous-ressources de domaine temporel correspondant respectivement auxdites au moins deux premières unités temporelles adjacentes, et la somme des durées respectives desdites au moins deux sous-ressources de domaine temporel étant égale à la durée de la première ressource de domaine temporel ; et déterminer la configuration d'une ressource de domaine temporel d'un DMRS dans lesdites au moins deux sous-ressources de domaine temporel en fonction de la durée de la première ressource de domaine temporel. Le procédé décrit dans la présente demande évite le problème selon lequel la réalisation séparée d'une configuration de ressource de domaine temporel pour le DMRS dans lesdites au moins deux sous-ressources de domaine temporel peut conduire à un nombre trop important de DMRS sur la première ressource de domaine temporel et, au lieu de cela, assure une distribution régulière des DMRS sur la totalité de la première ressource de domaine temporel.
PCT/CN2020/121694 2020-10-16 2020-10-16 Procédé de détermination de ressource pour signal de référence de démodulation (dmrs) et dispositif de communication Ceased WO2022077510A1 (fr)

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