WO2021017949A1 - 一种数据传输方法、装置及系统 - Google Patents

一种数据传输方法、装置及系统 Download PDF

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Publication number
WO2021017949A1
WO2021017949A1 PCT/CN2020/103317 CN2020103317W WO2021017949A1 WO 2021017949 A1 WO2021017949 A1 WO 2021017949A1 CN 2020103317 W CN2020103317 W CN 2020103317W WO 2021017949 A1 WO2021017949 A1 WO 2021017949A1
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WIPO (PCT)
Prior art keywords
frequency domain
terminal devices
bit
terminal device
terminal
Prior art date
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PCT/CN2020/103317
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English (en)
French (fr)
Inventor
余雅威
李超君
Original Assignee
华为技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to EP20845879.4A priority Critical patent/EP3996443A4/en
Publication of WO2021017949A1 publication Critical patent/WO2021017949A1/zh
Priority to US17/588,987 priority patent/US20220158779A1/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
    • H04L5/005—Allocation of pilot signals, i.e. of signals known to the receiver of common pilots, i.e. pilots destined for multiple users or terminals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/0413—MIMO systems
    • H04B7/0452—Multi-user MIMO systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0014—Three-dimensional division
    • H04L5/0023—Time-frequency-space
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
    • H04L5/0051—Allocation of pilot signals, i.e. of signals known to the receiver of dedicated pilots, i.e. pilots destined for a single user or terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0453—Resources in frequency domain, e.g. a carrier in FDMA
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal

Definitions

  • This application relates to the field of communication technology, and in particular to a data transmission method, device and system.
  • the multiple-input multiple-output (MIMO) system refers to the use of multiple transmitting antennas and receiving antennas at the transmitting end and the receiving end respectively, so that the signal is transmitted and received through the multiple antennas at the transmitting end and the receiving end, thereby fully Utilize space resources, improve communication quality, and double the system channel capacity without increasing spectrum resources and antenna transmit power.
  • a multi-user MIMO (multiple user MIMO, MU-MIMO) system refers to a MIMO system that simultaneously serves multiple terminal devices.
  • Different terminal devices can use the same time-frequency resource to send data to the base station, and the base station can also send multiple parallel data occupying the same time-frequency resource to different terminal devices, thereby realizing an increase in the overall transmission rate of the multi-user MIMO system.
  • the terminal devices that are served at the same time are called paired terminal devices.
  • the number of data transmitted by each terminal device in parallel is called the number of layers.
  • the data of different layers can be mapped to different antenna ports for transmission or Was received.
  • the paired terminal device sends data on the physical uplink shared channel (PUSCH) or receives data on the physical downlink shared channel (PDSCH), the configuration information required for data transmission (such as time and frequency) Resource location, modulation method, etc.), all need to be indicated by correctly interpreting downlink control information (DCI) carried on a physical downlink control channel (PDCCH).
  • DCI downlink control information
  • the base station can separately send DCI for each terminal device on the PDCCH to instruct the corresponding terminal device to transmit data (for example, PDSCH and/or PUSCH).
  • data for example, PDSCH and/or PUSCH.
  • separately sending DCI for each terminal device to perform data transmission instructions may cause the total DCI resource overhead of multiple terminal devices to be too large.
  • the embodiments of the present application provide a data transmission method, device, and system to solve the problem of excessive DCI overhead when sending DCI separately to multiple terminal devices for data transmission instructions.
  • an embodiment of the present application provides a data transmission method, including: a network device determines first downlink control information; the network device sends first downlink control information to n terminal devices; wherein, the first downlink control information Used to instruct n terminal devices to transmit data, n is an integer greater than or equal to 2.
  • the embodiment of the present application provides a data transmission method.
  • a network device instructs data transmission of n terminal devices by sending first downlink control information to n terminal devices.
  • each terminal device sends downlink control separately.
  • the total bit overhead for sending downlink control information can be saved, and system performance can be improved.
  • the first downlink control information includes modulation and demodulation reference signal DMRS antenna port indication information, and the DMRS antenna port indication information is used to indicate the first sequence value corresponding to the n terminal devices.
  • the network device indicates the first sequence value corresponding to the n terminal devices, so that the n terminal devices can determine the corresponding DMRS antenna port combination.
  • the method provided in the embodiment of the present application further includes: the network device sends first information to the n terminal devices, the first information includes a first correspondence table, and the first correspondence table The correspondence relationship between at least one first sequence value and at least one second sequence value and the DMRS antenna port is included.
  • the network device may send the first correspondence table to n terminal devices, so that the n terminal devices can determine the correspondence between at least one first sequence value and at least one second sequence value and the DMRS antenna port according to the first correspondence table.
  • the method provided in the embodiment of the present application further includes: the network device sends second information to the n terminal devices, the second information includes the value of n and the parallel transmission by the n terminal devices The total number of layers of data, the second information is used by the n terminal devices to determine a first correspondence table according to a predefined first relationship table set, the first relationship table set includes at least one first correspondence table, the The first correspondence table includes the correspondence between at least one first sequence value and at least one second sequence value and the DMRS antenna port.
  • the terminal device may determine the first correspondence table from the predefined first correspondence table set according to the second information, and the transmission resource for the network device to send the second information can be saved by predefining the first correspondence table.
  • the method provided in the embodiment of the present application further includes: the network device sends first indication information to the n terminal devices, where the first indication information is used to indicate each of the n terminal devices The second sequence value corresponding to the terminal device. Through the first sequence value and the second sequence value, each terminal device can determine its corresponding DMRS antenna port from the first correspondence table.
  • the n terminal devices when the frequency domain resources of the n terminal devices do not completely overlap, the n terminal devices include m target groups, and the m target groups in the same target group are used for terminal devices
  • the frequency domain resources for transmitting data are the same, and the frequency domain resources used for the terminal device to transmit data in different target groups in the m target groups are not completely the same, and m is an integer greater than or equal to 2.
  • the frequency domain resources of the terminal devices in each target group can be the same for data transmission, and the problem of indicating the downlink control information of n terminal devices when the frequency domain resources of n terminal devices are not completely overlapped .
  • the first correspondence table further includes: a correspondence between at least one group identifier and a DMRS antenna port, and the at least one group identifier corresponds to at least one target group.
  • the DMRS antenna port corresponding to the target group can be determined through the correspondence between the group identifier and the DMRS antenna port.
  • the method provided in the embodiment of the present application further includes: the network device sends a group identifier of the first target group to the terminal device of the first target group, and the group identifier is used to make it belong to the first target group.
  • the terminal device in the target group is determined to belong to the first target group, and the first target group is any one of the m target groups.
  • the terminal device of the first target group may be allowed to determine the first target group.
  • the first downlink control information includes second indication information
  • the second indication information is used to indicate frequency domain resources used when the n terminal devices perform data transmission.
  • the frequency domain resources used by n terminal devices for data transmission can be determined.
  • the second indication information when the allocation type of the frequency domain resource is a discrete frequency domain resource, includes at least one first bit and at least one second bit, where the first bit is used to indicate The frequency domain resource associated with the first bit is available, and the second bit is used to indicate that the frequency domain resource associated with the second bit is not available; the allocation type of the frequency domain resource is continuous frequency domain resource, and the second indication information
  • the resource indication value is included, and the resource indication value is used to determine the starting point of the frequency domain resource and the continuous resource block length of the frequency domain resource of n terminal devices. It can solve the problem of indication of frequency domain resources when frequency domain resources are discrete and continuous.
  • an embodiment of the present application provides a data transmission method, including: a terminal device receives first downlink control information from a network device, where the first downlink control information is used to instruct n terminal devices to transmit data, the n Is an integer greater than or equal to 2, the terminal device is any one of the n terminal devices; the terminal device performs data transmission with the network device according to the first downlink control information.
  • the embodiment of the present application provides a data transmission method.
  • N terminal devices determine their corresponding data transmission modes by receiving first downlink control information.
  • each terminal device separately performs downlink control information instructions, which can save downlink Control the bit overhead of information and improve system performance.
  • the first downlink control information includes modulation and demodulation reference signal DMRS antenna port indication information, and the DMRS antenna port indication information is used to indicate the first sequence value corresponding to the n terminal devices.
  • the method provided in the embodiment of the present application further includes: the terminal device receives first information from the network device, the first information includes the first correspondence table, and the first correspondence table includes The correspondence between the at least one first sequence value and the at least one second sequence value and the DMRS antenna port.
  • the method provided in the embodiment of the present application further includes: the terminal device receives second information from a network device, the second information includes the value of n and the parallel transmission of data by the n terminal devices The total number of layers; the terminal device determines the first correspondence table from the predefined first relationship table set according to the second information.
  • the method provided in the embodiment of the present application further includes: the terminal device receives first indication information from the network device, where the first indication information is used to indicate each terminal of the n terminal devices The second sequence value corresponding to the device; the terminal device determines the DMRS antenna port corresponding to the terminal device from the first correspondence table according to the first sequence value and the second sequence value.
  • the n terminal devices when the frequency domain resources of the n terminal devices do not completely overlap, the n terminal devices include m target groups, and the m target groups in the same target group are used for terminal devices
  • the frequency domain resources for transmitting data are the same, and the frequency domain resources used for the terminal device to transmit data in different target groups in the m target groups are not completely the same, and m is an integer greater than or equal to 2.
  • the first correspondence table further includes: a correspondence between at least one group identifier and a DMRS antenna port.
  • the method provided by the embodiment of the present application further includes: the terminal device receives a group identifier of a first target group from the network device, and the group identifier is used to make the group identifier of the first target group The terminal device determines that it belongs to the first target group, and the first target group is any one of the m target groups; the terminal device determines that the terminal device belongs to the first target group according to the group identifier.
  • the first downlink control information includes second indication information
  • the second indication information is used to indicate frequency domain resources used when the n terminal devices perform data transmission.
  • the allocation type of the frequency domain resource is a discrete frequency domain resource
  • the second indication information includes at least one first bit and at least one second bit, where the first bit is used to indicate The frequency domain resource associated with the first bit is available, and the second bit is used to indicate that the frequency domain resource associated with the second bit is not available;
  • the allocation type of the frequency domain resource is continuous frequency domain resource, and the second indication information includes The resource indication value is used to determine the starting point of the frequency domain resource of the n terminal devices and the continuous resource block length of the frequency domain resource.
  • an embodiment of the present application provides a data transmission device, which can implement the first aspect or any possible implementation method of the first aspect, and therefore can also implement any of the first aspect or the first aspect.
  • the data transmission device may be a network device, or a device that can support the network device to implement the method in the first aspect or any possible implementation manner of the first aspect, for example, a chip applied to the network device.
  • the device can implement the above method by software, hardware, or by hardware executing corresponding software.
  • an embodiment of the present application provides a data transmission device, including: a processing unit, configured to determine first downlink control information; a communication unit, configured to send first downlink control information to n terminal devices; wherein, The first downlink control information is used to instruct the n terminal devices to transmit data, where n is an integer greater than or equal to 2.
  • the first downlink control information includes modulation and demodulation reference signal DMRS antenna port indication information, and the DMRS antenna port indication information is used to indicate the first sequence value corresponding to the n terminal devices.
  • the communication unit is further configured to send first information to the n terminal devices, the first information includes a first correspondence table, and the first correspondence table includes at least one first sequence Value and the correspondence between at least one second sequence value and the DMRS antenna port.
  • the communication unit is further configured to send second information to the n terminal devices, where the second information includes the value of n and the total number of layers of data transmitted in parallel by the n terminal devices,
  • the second information is used by the n terminal devices to determine a first correspondence table according to a predefined first relationship table set, the first relationship table set includes at least one first correspondence table, and the first correspondence table includes The correspondence between the at least one first sequence value and the at least one second sequence value and the DMRS antenna port.
  • the communication unit is further configured to send first indication information to the n terminal devices, and the first indication information is used to indicate the first indication information corresponding to each of the n terminal devices. Two sequence value.
  • the n terminal devices when the frequency domain resources of the n terminal devices do not completely overlap, the n terminal devices include m target groups, and the m target groups in the same target group are used for terminal devices
  • the frequency domain resources for transmitting data are the same, and the frequency domain resources used for the terminal device to transmit data in different target groups in the m target groups are not completely the same, and m is an integer greater than or equal to 2.
  • the first correspondence table further includes: a correspondence between at least one group identifier and a DMRS antenna port, and the at least one group identifier corresponds to at least one target group.
  • the communication unit is further configured to send a group identifier of the first target group to the terminal devices of the first target group, and the group identifier is used to make the terminal devices belonging to the first target group It is determined to belong to the first target group, and the first target group is any one of the m target groups.
  • the first downlink control information includes second indication information
  • the second indication information is used to indicate frequency domain resources used when the n terminal devices perform data transmission.
  • the second indication information includes at least one first bit and at least one second bit, where the first bit is used to indicate The frequency domain resource associated with the first bit is available, and the second bit is used to indicate that the frequency domain resource associated with the second bit is not available; the allocation type of the frequency domain resource is continuous frequency domain resource, and the second indication information
  • the resource indication value is included, and the resource indication value is used to determine the starting point of the frequency domain resource and the continuous resource block length of the frequency domain resource of n terminal devices.
  • an embodiment of the present application provides a data transmission device.
  • the data transmission device may be a network device or a chip in the network device.
  • the data transmission device may include: a communication unit and a processing unit.
  • the communication unit may be a communication interface or an interface circuit.
  • the processing unit may be a processor.
  • the processing unit executes the instructions stored in the storage unit, so that the data transmission device implements the first aspect or the method described in any one of the possible implementation manners of the first aspect.
  • the processing unit may be a processor, and the communication unit may be collectively referred to as a communication interface.
  • the processor, the communication interface and the memory are coupled with each other.
  • an embodiment of the present application provides a data transmission device, which can implement the second aspect or any of the possible implementation methods of the second aspect, and therefore can also implement the second aspect or any of the second aspect.
  • the communication device may be a terminal device, or a device that can support the terminal device to implement the second aspect or any possible implementation manner of the second aspect, for example, a chip applied to the terminal device.
  • the device can implement the above method by software, hardware, or by hardware executing corresponding software.
  • an embodiment of the present application provides a data transmission device.
  • the data transmission device includes a communication unit configured to receive first downlink control information from a network device, where the first downlink control information is used to indicate n
  • the terminal device transmits data, where n is an integer greater than or equal to 2, and the terminal device is any one of the n terminal devices; the communication unit is also used to perform data transmission with the network device according to the first downlink control information .
  • the first downlink control information includes modulation and demodulation reference signal DMRS antenna port indication information, and the DMRS antenna port indication information is used to indicate the first sequence value corresponding to the n terminal devices.
  • the communication unit is further configured to receive first information from a network device, the first information includes the first correspondence table, and the first correspondence table includes at least one first sequence value And the correspondence between at least one second sequence value and the DMRS antenna port.
  • the communication unit is further configured to receive second information from a network device, where the second information includes the value of n and the total number of layers of data transmitted in parallel by the n terminal devices; the apparatus It further includes: a processing unit, configured to determine a first correspondence table from a predefined first relationship table set according to the second information, the first relationship table set including at least one first correspondence table.
  • the communication unit is further configured to receive first indication information from the network device, where the first indication information is used to indicate the second sequence corresponding to each of the n terminal devices Value; the processing unit is further configured to determine the DMRS antenna port corresponding to the terminal device from the first correspondence table according to the first sequence value and the second sequence value.
  • the n terminal devices when the frequency domain resources of the n terminal devices do not completely overlap, the n terminal devices include m target groups, and the m target groups in the same target group are used for terminal devices
  • the frequency domain resources for transmitting data are the same, and the frequency domain resources used for the terminal device to transmit data in different target groups in the m target groups are not completely the same, and m is an integer greater than or equal to 2.
  • the first correspondence table further includes: a correspondence between at least one group identifier and a DMRS antenna port, and the at least one group identifier corresponds to at least one target group.
  • the communication unit is further configured to receive a group identifier of the first target group from the network device, and the group identifier is used to enable the terminal devices belonging to the first target group to determine that they belong to the first target group.
  • a target group, the first target group is any one of the m target groups; the processing unit is further configured to determine that the terminal device belongs to the first target group according to the group identifier.
  • the first downlink control information includes second indication information
  • the second indication information is used to indicate frequency domain resources used when the n terminal devices perform data transmission.
  • the allocation type of the frequency domain resource is a discrete frequency domain resource
  • the second indication information includes at least one first bit and at least one second bit, where the first bit is used to indicate The frequency domain resource associated with the first bit is available, and the second bit is used to indicate that the frequency domain resource associated with the second bit is not available;
  • the allocation type of the frequency domain resource is continuous frequency domain resource, and the second indication information includes The resource indication value is used to determine the starting point of the frequency domain resource of the n terminal devices and the continuous resource block length of the frequency domain resource.
  • an embodiment of the present application provides a data transmission device, and the data transmission device may be a terminal device or a chip in the terminal device.
  • the data transmission device may include: a communication unit and a processing unit.
  • the communication unit may be a communication interface or an interface circuit.
  • the data transmission device may also include a storage unit.
  • the processing unit may be a processor.
  • the processing unit executes the instructions stored in the storage unit, so that the data transmission device implements the second aspect or the method described in any one of the possible implementation manners of the second aspect.
  • the processing unit may be a processor, and the communication unit may be collectively referred to as a communication interface.
  • the processing unit executes the computer program code stored in the storage unit, so that the terminal device implements the second aspect or the method described in any one of the possible implementation manners of the second aspect.
  • the processor, the communication interface and the memory are coupled with each other.
  • the embodiments of the present application provide a computer-readable storage medium.
  • the computer-readable storage medium stores a computer program or instruction.
  • the computer program or instruction When the computer program or instruction is run on a computer, the computer can execute operations as described in the first aspect to the first aspect.
  • the embodiments of the present application provide a computer-readable storage medium.
  • the computer-readable storage medium stores a computer program or instruction.
  • the computer program or instruction When the computer program or instruction is run on a computer, the computer executes operations such as the second aspect to the first aspect.
  • the embodiments of the present application provide a computer program product including instructions.
  • the instructions run on a computer, the computer executes the data transmission described in the first aspect or various possible implementations of the first aspect. method.
  • this application provides a computer program product including instructions, which when the instructions run on a computer, cause the computer to execute the second aspect or a data transmission method described in various possible implementations of the second aspect.
  • an embodiment of the present application provides a communication device.
  • the communication device includes a processor and a memory.
  • the memory stores instructions. When the instructions are executed by the processor, they can implement various aspects such as the first aspect or the first aspect. Possible implementations describe the data transmission method.
  • an embodiment of the present application provides a communication device.
  • the communication device includes a processor and a memory.
  • the memory stores instructions. When the instructions are executed by the processor, they can implement various aspects such as the second aspect or the second aspect. Possible implementations describe the data transmission method.
  • an embodiment of the present application provides a communication device.
  • the communication device includes one or more modules for implementing the methods of the first and second aspects.
  • the one or more modules may be compatible with the first and second aspects.
  • the steps in the method of the second aspect correspond to each other.
  • an embodiment of the present application provides a chip that includes a processor and a communication interface, the communication interface is coupled to the processor, and the processor is used to run a computer program or instruction to implement the first aspect or each of the first aspect.
  • the communication interface is used to communicate with other modules outside the chip.
  • an embodiment of the present application provides a chip including a processor and a communication interface, the communication interface and the processor are coupled, and the processor is used to run a computer program or instruction to implement the second aspect or each of the second aspect.
  • the communication interface is used to communicate with other modules outside the chip.
  • the chip provided in the embodiment of the present application further includes a memory for storing computer programs or instructions.
  • embodiments of the present application provide a communication system, which includes any one or more of the following: the third aspect and the data transmission device described in various possible implementations, the fourth aspect and the fourth aspect Aspects of the various possible implementations are described in the data transmission device.
  • any device or computer readable storage medium or computer program product or chip provided above is used to execute the corresponding method provided above, therefore, the beneficial effects that can be achieved can refer to the corresponding method provided above The beneficial effects of the corresponding solutions in the above will not be repeated here.
  • FIG. 1 is a schematic diagram of an application scenario of a communication system applicable to embodiments of the present application
  • FIG. 2 is a schematic structural diagram of a communication system applicable to an embodiment of the present application
  • FIG. 3 is a schematic diagram of downlink control information indicating data transmission according to an embodiment of the application.
  • FIG. 4 is a schematic diagram of DMRS antenna port allocation provided by an embodiment of the application.
  • FIG. 5 is a schematic flowchart of a data transmission method provided by an embodiment of this application.
  • FIG. 6 is a schematic structural diagram of a data transmission device provided by an embodiment of the application.
  • FIG. 7 is a schematic structural diagram of another data transmission device provided by an embodiment of this application.
  • FIG. 8 is a schematic structural diagram of a communication device provided by an embodiment of this application.
  • FIG. 9 is a schematic structural diagram of a chip provided by an embodiment of the application.
  • At least one (species) in the embodiments of the present application includes one (species) or more (species).
  • Multiple (species) means two (species) or more than two (species).
  • at least one of A, B and C includes: A alone, B alone, A and B simultaneously, A and C simultaneously, B and C simultaneously, and A, B and C simultaneously.
  • "/" means or, for example, A/B can mean A or B; the "and/or” in this document is only an association relationship describing associated objects, meaning that There are three relationships, such as A and/or B, which can mean: A alone exists, A and B exist at the same time, and B exists alone.
  • Multiple means two or more than two.
  • the words “first”, “second” and the like are used in the embodiments of the present application to distinguish the same or similar items with basically the same function and effect. Those skilled in the art can understand that the words “first”, “second” and the like do not limit the quantity and execution order, and the words “first” and “second” do not limit the difference.
  • CDMA code division multiple access
  • TDMA time division multiple access
  • FDMA frequency division multiple access
  • OFDMA orthogonal frequency-division multiple access
  • SC-FDMA single carrier frequency-division multiple access
  • the term "system” can be replaced with "network”.
  • the CDMA system can implement wireless technologies such as universal terrestrial radio access (UTRA) and CDMA2000.
  • UTRA can include wideband CDMA (WCDMA) technology and other CDMA variants.
  • CDMA2000 can cover the interim standard (IS) 2000 (IS-2000), IS-95 and IS-856 standards.
  • the TDMA system can implement wireless technologies such as the global system for mobile communication (GSM).
  • GSM global system for mobile communication
  • OFDMA system can realize such as evolved universal wireless terrestrial access (evolved UTRA, E-UTRA), ultra mobile broadband (ultra mobile broadband, UMB), IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, Flash OFDMA And other wireless technologies.
  • UTRA and E-UTRA are UMTS and UMTS evolved versions.
  • 3GPP is a new version of UMTS using E-UTRA in long term evolution (LTE) and various versions based on LTE evolution.
  • LTE long term evolution
  • NR new radio
  • the communication system may also be applicable to future-oriented communication technologies, all of which are applicable to the technical solutions provided in the embodiments of the present application.
  • massive machine type communication is one of the main application scenarios in the NR system.
  • mMTC massive machine type communication
  • the position of the scatterers in the network equipment, terminal equipment, and the channel basically remain unchanged. Therefore, the uplink wireless channel from the terminal equipment to the network equipment also remains basically unchanged within a time period of 100 milliseconds.
  • the monitoring terminal 40 can upload business data generated by city monitoring, traffic monitoring, home monitoring, and factory monitoring to The network device 10 communicates with the local server 30 through the cloud network. Since the video service data packet is large, the data transmission is relatively stable, and multiple monitoring terminals work in the same frequency range for a long time, the multi-user monitoring terminal formed by multiple video return cameras will be preset after the pairing is completed. There will be no change in time.
  • the multi-user MIMO system in the embodiment of the present application may include a quasi-static channel system similar to the above-mentioned video surveillance application scenario.
  • FIG. 2 shows a schematic structural diagram of a communication system provided by an embodiment of the present application.
  • the communication system is a MU-MIMO system and includes: a network device 10 and one or more terminals communicating with the network device 10 Equipment 20.
  • each of the one or more terminal devices 20 has one or more antenna ports (for example, DMRS antenna ports), and the network device 10 also has one or more antenna ports.
  • Each antenna port can be used to receive data, can also be used to send data.
  • the terminal device 20 sends uplink data to the network device 10
  • one or more antenna ports of the terminal device 20 may be used in whole or in part for sending data.
  • the terminal device 20 receives downlink data from the network device 10
  • one or more antenna ports of the terminal device 20 may be used to receive data in whole or in part.
  • the antenna ports in the embodiments of the present application all refer to DMRS antenna ports.
  • Each terminal device can use its own antenna port to send uplink data to the network device 10, and the network device 10 can receive uplink data from each terminal device through one or more antenna ports (for example, port 1.1, port 1.2, etc.) , And send downlink data to each terminal device through one or more antenna ports.
  • Each terminal device can also use its own antenna port (for example, port 2.1, port 2.2, etc.) to receive downlink data from the network device 10.
  • the network device 10 and one or more terminal devices 20 may use MIMO technology to communicate.
  • Different terminal devices 20 in one or more terminal devices 20 may use the same time-frequency resource to send uplink data to the network device 10.
  • the network device may send multiple parallel downlink data occupying the same time-frequency resource to one or more terminal devices 20 to achieve an increase in the transmission rate of multiple users.
  • the one or more terminal devices 20 being served can be called paired terminal devices (Paired UE), the number of data transmitted in parallel by each terminal device is called the number of layers (Layer), and the data of different layers are mapped by layer mapping.
  • this MIMO system serving multiple users at the same time is called multi-user MIMO (MU-MIMO).
  • MU-MIMO multi-user MIMO
  • the paired terminal device can send uplink data to the network device 10 on the PUSCH, or receive downlink data from the network device on the physical downlink shared channel PDSCH.
  • the terminal device 20 When receiving downlink data, the terminal device 20 needs to know the scheduling information configured by the network device 10 to the terminal device 20, such as the allocation position of time-frequency resources, the modulation and coding mode, and so on. Similarly, when the terminal device 20 is authorized to perform uplink data transmission to the network device 10, it also needs to perform data transmission in the corresponding position and modulation and coding mode according to the scheduling information indicated by the network device 10. All these scheduling information belong to Downlink Control Information (DCI). Therefore, the terminal device 20 needs to perform indication and scheduling by correctly interpreting the DCI carried on the PDCCH.
  • DCI Downlink Control Information
  • Each downlink subframe includes a control region and a data region.
  • the control region is located in the first 1-3 symbols of the 14 Orthogonal Frequency Division Multiplexing (OFDM) symbols in each downlink subframe (subframe). (When the system bandwidth is 1.4MHz, 4 OFDM symbols may be occupied), used to transmit downlink control signaling, such as DCI, and the channel type corresponding to the downlink control signaling includes PDCCH carrying DCI.
  • OFDM Orthogonal Frequency Division Multiplexing
  • the control region contains multiple PDCCH channels, and multiple DCIs can be configured in a subframe of the PDCCH channel, and the correct transmission of PDSCH or PUSCH can be indicated through the fields configured in the DCI.
  • the indication overhead of the DCI is greater, the time-frequency resources used for data transmission in the same subframe are less. Therefore, it is necessary to minimize the DCI overhead and make full use of time-frequency resources to transmit valid data.
  • the network equipment can receive feedback from multiple terminal equipment on the downlink channel (for example, channel state information (CSI) or channel quality indicator (CQI)) and network Related algorithms on the device side determine the number of best paired terminal devices in the current channel state, the number of layers of data that each paired terminal device transmits in parallel, and so on.
  • Multiple paired terminal devices may occupy the same time-frequency resources, or they may occupy the same time-domain resources, but the occupied frequency-domain resources are not completely the same (the occupied frequency-domain resources may be completely different, or some of them may be the same).
  • the network equipment will independently allocate DCI to each terminal device on the PDCCH to instruct the corresponding user terminal to perform PDSCH and/or PUSCH transmission.
  • the total DCI overhead of multiple terminal devices is relatively large, which reduces the resources used for effective data transmission on the same time-frequency resources.
  • the DCI may contain 8 different types (Format) indication fields, and different indication fields are used to indicate the transmission of the corresponding PDSCH or PUSCH data channel.
  • Format Format
  • Table 1 for 8 different Formats and their corresponding uses.
  • the DCI Format 0_1 for scheduling PUSCH transmission is taken as an example for description.
  • the parameter configuration in the DCI includes:
  • DCI Format indication occupies 1 bit. When the value of this field is 0, it indicates that the DCI is a scheduling indication for PUSCH data transmission. When the value is 1, it indicates that the DCI is a scheduling indication for PDSCH data transmission.
  • Subcarrier indication Occupies 0bit or 3bit.
  • Part of the bandwidth (bandwidth part, BWP) indication Occupies 0, 1, or 2 bits. If it indicates that the number of uplink BWP configured by the upper layer is k BWP , the number of bits occupied by the BWP indication is Among them, the symbol Indicates rounding up.
  • the number of high-level configured BWPs (not including the initial BWP) does not exceed 3, it is indicated by the BWP identifier (such as BWP-ID), and the corresponding BWP-ID is selected from the configured BWP set according to the high-level signaling configuration.
  • BWP the total number of BWPs is equal to k BWP +1.
  • the bit value indicated by the BWP is selected from the predefined table through a separate DCI command.
  • the BWP is determined from the BWP set configured by the higher layer signaling through the fields in the DCI, for example, the BWP indication in the DCI
  • the value of the domain is 00, the first BWP is taken.
  • the value m of the field time-domain-resource-assignment in the DCI can be determined, where m is an integer greater than or equal to 0, and m+1 is determined as the row index.
  • the allocation of time domain resources can also be determined through the pusch-Allocationlist in the high-level signaling pusch-ConfigCommon/pusch-Config.
  • the allocation of time domain resources is determined through the field pusch-Allocationlist in the high-level signaling pusch-ConfigCommon or pusch-Config.
  • the default (Default) A PUSCH time domain resource allocation is used, which are DefaultA normal cyclic prefix (cyclic prefix, CP) and extended CP respectively .
  • Table 4 is the normal CP
  • Table 5 is the extended CP.
  • the CP time length intercepted by the normal CP is shorter than the extended CP.
  • the coverage area is smaller, the corresponding multipath delay spread is smaller, and the required CP is smaller, so normal CP can be adopted.
  • the coverage area is larger, the corresponding multipath delay extension is larger, and the required CP is larger, and the extended CP can be used.
  • the subcarrier interval is 15KHz
  • the normal CP is 144Ts
  • the specific values of the PUSCH mapping type and related parameters can be determined through the DCI notification row index. For example, when the coverage is small, if the row index is 1, the PUSCH mapping type is Type A, the slot offset value K2 is j, the slot start position S is 0, and the continuous continuous symbol length L is 14. Among them, the value of j is related to the PUSCH sub-carrier spacing configuration ⁇ PUSCH . Referring to Table 6, when ⁇ PUSCH is 0, the value of j is 1, and when ⁇ PUSCH is 1, the value of j is 1.
  • the slot start position S and the continuous persistence symbol L of the time domain resource allocation can still be determined by the DCI notification row index, but the slot offset value K2 It is determined according to the reportSlotConfig in the high-level parameter CSI-ReportConfig.
  • ⁇ PUSCH and ⁇ PDCCH respectively represent the subcarrier spacing configuration of PUSCH and PDCCH.
  • the frequency domain resource allocation types include discrete frequency domain resource type0 and continuous frequency domain resource type1.
  • Discrete frequency domain resources refer to available frequency domain resources that are discontinuous or incompletely continuous, and continuous frequency domain resources refer to unavailable frequency domain resources with continuous frequency domain resources and no gaps in between.
  • the terminal device may determine the frequency domain resource allocation type according to the first downlink control information, and may also determine the frequency domain resource allocation type according to high-level signaling.
  • the frequency domain resource allocation type can be determined through the first downlink control information. If the resource allocation in pusch-Config is a configuration other than dynamicswitch, the allocation type of frequency domain resources is determined through high-level signaling.
  • the network device is a terminal device
  • the allocation type of the configured frequency domain resources can only be type1.
  • the network device configures the frequency domain for the terminal device
  • the resource allocation type can be type0 or type1.
  • the frequency domain resource allocation type configured by the network device for the terminal device is type1.
  • the bitmap notified by the DCI indicates the resource block group (RBG) resources that the terminal device should schedule.
  • RBG resource block group
  • each bit represents a resource block group (resource block group, RBG), and the number of resource blocks (resource block, RB) included in each RBG depends on the partial bandwidth and configuration type (Configuration, Config for short). Both BWP and configuration type are configured through high-level signaling.
  • each RBG includes 4 RBs, that is, 4 physical resource blocks (PRBs).
  • each RBG includes 8 physical resource blocks (PRB).
  • Table 7 can also be represented by Table 8, as follows:
  • the value of the bit in the corresponding position is 1, which indicates that the frequency domain resource associated with the position is available. On the contrary, the value of the bit in the corresponding position is 0, which indicates that the frequency domain resource associated with the position is not available.
  • the frequency domain resource allocation type is type1
  • the frequency domain resource allocation is configured through two parameters: the starting position of the RB and the continuous duration of the RB. Therefore, type 1 frequency domain resource allocation only supports continuous PRB allocation.
  • Modulation and demodulation reference signal demodulation defenrece signal, DMRS
  • the network device determines the antenna port according to the configuration type of the downlink DMRS (DL_dmrs_config_type) and the time domain length of the downlink front DMRS (DL_dmrs_config_maxlength).
  • DL_dmrs_config_type includes the first configuration type type-1 and the second configuration type type-2.
  • DL_dmrs_config_maxlength can include 1 time. Domain symbol (symbol) and 2 symbols.
  • the NR system can support space division multiplexing of 12 antenna ports, but in uplink transmission, a single terminal device can support up to 4 layers of data transmission.
  • the DMRS frequency domain can be divided into 2 groups, namely code division multiplexing (CDM) group 0 and CDM group 1.
  • CDM code division multiplexing
  • the DMRS frequency domain can be divided into 3 groups, namely CDM group 0, CDM group 1, and CDM group 2.
  • the configuration type of the downlink DMRS is type-1 and the time domain length of the downlink pre-DMRS is 1 symbol, it supports the transmission of up to 4 layers of data, corresponding to 4 different antenna ports, among which CDM group 0 supports port 0, port1 Frequency domain OCC multiplexing of CDM; CDM group1 supports frequency domain OCC multiplexing of port 2 and port 3.
  • CDM group0 supports port 0, port1 (port4, port5) frequency domain OCC multiplexing; CDM group1 supports port 2, port3 (port6, port7) frequency domain OCC multiplexing use.
  • the downlink DMRS configuration type is type-2 and the downlink pre-DMRS time domain length is 1 symbol, it supports up to 6 layers of data transmission, corresponding to 6 different antenna ports.
  • CDM group0 supports port 0 and port1.
  • Frequency domain OCC multiplexing CDM group1 supports frequency domain OCC multiplexing of port 2, port 3;
  • CDM group 2 supports frequency domain OCC multiplexing of port 4 and port 5.
  • CDM group0 supports port 0, port1( The frequency domain OCC multiplexing of port6, port7); CDM group1 supports the frequency domain OCC multiplexing of port2 and port3 (port8, port9); CDM group2 supports the frequency domain OCC multiplexing of port4 and port5 (port10, port11).
  • terminal device 1 and terminal device 2 when terminal device 1 and terminal device 2 use the same PRB to transmit data, terminal device 1 and terminal device 2 can be in a CDM group (occupying the same subcarrier), and interference cancellation can be achieved through orthogonal codes, for example, Terminal device 1 (layer 2) uses port 0 and port 1; terminal device 2 (layer 1) uses port 4.
  • terminal device 1 and terminal device 2 use different PRBs to transmit data
  • terminal device 1 and terminal device 2 cannot be in the same CDMgroup (it must occupy different subcarriers and achieve interference cancellation through FDM).
  • terminal device 1 Layer 2 can adopt port 0, port 1
  • terminal device 2 layer 1 can adopt port 2.
  • the antenna port number used by each terminal device needs to be notified of the index value through the DCI, which is selected from the predefined Table 9.
  • a 2-bit indication is used in the DCI to notify the terminal device of the antenna port that should be used.
  • the bit value is 00
  • the corresponding value value is 0, and the antenna port that the terminal device should use is port 0
  • the bit value is 01
  • the corresponding value value is 1, and the antenna port that the terminal device should use is port 1.
  • the bit value is 10
  • the corresponding value value is 2
  • the antenna port that the terminal device should use is port 2
  • the bit value is 11
  • the antenna port that the terminal device should use is port 3.
  • Modulation and coding scheme (MCS) indication :
  • the network device determines the uplink channel fading according to the uplink sounding reference signal (SRS), and selects the corresponding modulation order and target bit rate.
  • SRS uplink sounding reference signal
  • the scheduling information of the uplink transmission is sent to the terminal device through DCI.
  • the network equipment When the channel quality is good, the network equipment will choose a higher modulation order and target code rate to increase the data rate of the uplink transmission; when the channel quality is poor, the network equipment will choose a lower modulation order and target code rate Rate, by adding redundant bits to resist channel fading, to ensure the correct transmission of TB.
  • the existing NR protocol provides 32 different MCS combinations in the form of a predefined table.
  • the corresponding index value is sent to the terminal device through the 5-bit indication in the DCI, and the terminal device can be based on the index value. Determine the modulation order and target code rate that should be used.
  • the adopted modulation order is 2
  • the product of the target code rate and 1024 is 251.
  • Each terminal device determines whether the data is newly transmitted or retransmitted through a 1-bit NDI indication.
  • the terminal equipment determines whether the data is retransmitted in the uplink, including the following two methods:
  • Manner 1 Triggered by an acknowledgement (ACK) response or a non-acknowledgement (Negative Acknowledgement, NACK) response transmitted in a physical hybrid ARQ indicator channel (PHICH).
  • the network device decodes the PUSCH after receiving the PUSCH. If the decoding is correct, the ACK is sent through the PHICH to indicate that the terminal device does not need to perform data retransmission; if the decoding fails, the NACK is sent through the PHICH to indicate that the terminal device needs to retransmit data.
  • Manner 2 Instruct the terminal device to send data by triggering the uplink scheduling grant (UL grant) transmitted in the PDCCH. Determine whether the data is newly transmitted or retransmitted by whether the NDI is reversed.
  • NDI inversion means that the value of NDI changes from 0 to 1, or from 1 to 0. If the NDI parameter is reversed compared with the last time, it means a new transmission. If the NDI parameter is the same as the last time, it means a retransmission.
  • PHICH is usually used to indicate non-adaptive retransmission, and has a lower priority than the NDI indication in DCI. Retransmission is performed through the NDI inversion in the DCI of the PDCCH, which can adaptively resolve user resource conflicts.
  • the RV number of each terminal device needs a 2-bit indication, and the value may be ⁇ 0,1,2,3 ⁇ .
  • the current data channel transmission uses low density parity check coding (LDPC) for channel coding, which can enhance the ability to resist channel fading.
  • LDPC low density parity check coding
  • the LDPC-encoded bit sequence will be rate-matched according to the MCS instruction, that is, selected from different positions in the LDPC-encoded bit sequence to meet the corresponding code rate.
  • Part of the bits selected from the bit sequence after LDPC encoding is called an RV.
  • the bit sequence after LDPC encoding has 4 starting points for selection.
  • the selected RVs can be defined as RV0, RV1, RV2, and RV3 respectively.
  • the RV number used by the terminal device for each transmission needs to be instructed and retransmitted in HARQ In, the RV received multiple times will be combined and decoded.
  • Hybrid Automatic Retransmission Quest (Hybrid Automatic Retransmission Quest, HARQ) process instructions:
  • the HARQ process of each terminal device requires a 4-bit indication. Because the terminal device has a long waiting time between sending data and receiving data, in order to avoid wasting time domain resources in the waiting time, the time corresponding to the waiting time can be used. The domain symbol carries out the data transmission of other processes. Therefore, the current NR system can support the transmission of up to 16 processes.
  • the network device 10 may be a transmission reception point (TRP), a base station, a relay station, or an access point.
  • the network device 10 may be a network device in a 5G communication system or a network device in a future evolution network; it may also be a wearable device or a vehicle-mounted device. It can also be the base transceiver station (BTS) in the global system for mobile communication (GSM) or code division multiple access (CDMA) network, or broadband
  • the NB (NodeB) in wideband code division multiple access (WCDMA) may also be the eNB or eNodeB (evolutional NodeB) in long term evolution (LTE).
  • the network device 10 may also be a wireless controller in a cloud radio access network (cloud radio access network, CRAN) scenario.
  • cloud radio access network cloud radio access network, CRAN
  • the terminal device 20 is a device with a wireless communication function, which can be deployed on land, including indoor or outdoor, handheld or vehicle-mounted. It can also be deployed on the water (such as ships, etc.). It can also be deployed in the air (for example, on airplanes, balloons, and satellites).
  • Terminal equipment is also referred to as user equipment (UE), mobile station (MS), mobile terminal equipment (mobile terminal, MT), and terminal equipment, etc., which provide users with voice and/or data connectivity Sexual equipment.
  • terminal devices include handheld devices and vehicle-mounted devices with wireless connection functions.
  • terminal devices can be: mobile phones (mobile phones), tablets, laptops, handheld computers, mobile internet devices (MID), wearable devices (such as smart watches, smart bracelets, pedometers, etc.) , In-vehicle equipment (for example, cars, bicycles, electric cars, airplanes, ships, trains, high-speed rail, etc.), virtual reality (VR) equipment, augmented reality (AR) equipment, industrial control (industrial control) Wireless terminal equipment, smart home equipment (for example, refrigerators, TVs, air conditioners, electric meters, etc.), smart robots, workshop equipment, wireless terminal equipment in self-driving, and wireless in remote medical surgery Terminal equipment, wireless terminal equipment in smart grid, wireless terminal equipment in transportation safety, wireless terminal equipment in smart city, or wireless terminal in smart home Equipment, flying equipment (for example, smart robots, hot air balloons, drones, airplanes), etc.
  • In-vehicle equipment for example, cars, bicycles, electric cars, airplanes, ships, trains, high-speed rail, etc.
  • VR virtual reality
  • AR augmented reality
  • the terminal device is a terminal device that often works on the ground, such as a vehicle-mounted device.
  • chips deployed in the above devices such as System-On-a-Chip (SOC), baseband chips, etc., or other chips with communication functions may also be referred to as terminal devices.
  • the terminal device may be a vehicle with corresponding communication function, or a vehicle-mounted communication device, or other embedded communication device, or a user-held communication device, including a mobile phone, a tablet computer, and the like.
  • the terminal device may also be a wearable device.
  • Wearable devices can also be called wearable smart devices. It is a general term for the application of wearable technology to intelligently design daily wear and develop wearable devices, such as glasses, gloves, watches, clothing and shoes.
  • a wearable device is a portable device that is directly worn on the body or integrated into the user's clothes or accessories. Wearable devices are not only a hardware device, but also realize powerful functions through software support, data interaction, and cloud interaction.
  • wearable smart devices include full-featured, large-sized, complete or partial functions that can be achieved without relying on smart phones, such as smart watches or smart glasses, and only focus on a certain type of application function, and need to cooperate with other devices such as smart phones.
  • Network equipment is an entity that can be used to transmit or receive signals in conjunction with terminal equipment.
  • it can be an access point (Access Point, AP) in WLAN, an eNB or eNodeB in LTE, or a relay station or access point, or vehicle-mounted equipment, wearable devices, and network equipment in the future 5G network.
  • the network equipment provides services for the cell, and the terminal equipment communicates with the network equipment through the transmission resources used by the cell (for example, time domain resources, or frequency domain resources, or time-frequency resources).
  • the cell can be a cell corresponding to a network device (e.g. a base station).
  • the cell can belong to a macro base station or a base station corresponding to a small cell.
  • the small cell here can include: metro cell, micro cell ( Micro cells, pico cells, femto cells, etc. These small cells have the characteristics of small coverage and low transmit power, and are suitable for providing high-rate data transmission services.
  • each terminal device In the above DCI indication of format0_1, multiple fields are defined to indicate the time-frequency resource, modulation and coding method, antenna port and many other parameters that each terminal device should use for PUSCH transmission. Each DCI needs to occupy multiple bits to indicate the data transmission of the terminal device. Even in the MU-MIMO system, the DCI of each terminal device is independently configured.
  • FIG. 5 shows a schematic flowchart of a data transmission method provided by an embodiment of the present application, and the method includes:
  • the network device determines first downlink control information.
  • the first downlink control information includes DMRS antenna port indication information, frequency domain resource indication information, time domain resource indication information, hybrid automatic retransmission request (Hybrid Automatic Retransmission Quest, HARQ) process indication, new data indicator (New Data Indicator, Any one or more of NDI indication and Redundancy Version (RV) indication.
  • DMRS antenna port indication information frequency domain resource indication information, time domain resource indication information, hybrid automatic retransmission request (Hybrid Automatic Retransmission Quest, HARQ) process indication, new data indicator (New Data Indicator, Any one or more of NDI indication and Redundancy Version (RV) indication.
  • HARQ Hybrid Automatic Retransmission Quest
  • RV Redundancy Version
  • the network device executes S101. For example, based on the CSI reported by each terminal device in the cell, the interference calculation of multiple terminal devices, the interference calculation of multiple cells, the current service type and characteristics, etc., the network equipment determines the number of paired terminal devices, the total number of layers of parallel transmission data, and The first downlink control information.
  • the network device sends first downlink control information to n terminal devices.
  • the first downlink control information is used to instruct n terminal devices to transmit data, and n is an integer greater than or equal to 2.
  • n terminal devices are paired terminal devices, and the n terminal devices occupy the same time domain resources when transmitting data, so they can share one downlink control information.
  • the first downlink control information is common information of n terminal devices, that is, information that can be shared by n terminal devices.
  • the network device When the frequency domain resources used by the n terminal devices to transmit data completely overlap, the network device sends the same first downlink control information to each of the n terminal devices.
  • the network device may send a PDCCH to each of the n terminal devices, where the PDCCH carries the first downlink control information.
  • the terminal device receives the first downlink control information from the network device.
  • the terminal device performs data transmission with the network device according to the first downlink control information.
  • the terminal device can determine information such as DMRS antenna port, frequency domain resource, time domain resource, etc. according to the first downlink control information, and perform data transmission with the network device according to these information.
  • the data transmission between the terminal device and the network device includes: the terminal device receives downlink data from the network device, and/or the terminal device sends uplink data to the network device.
  • the embodiment of the present application provides a data transmission method.
  • a network device instructs data transmission of n terminal devices by sending first downlink control information to n terminal devices.
  • each terminal device sends downlink control separately.
  • the information indication can save the total bit overhead for sending downlink control information and improve system performance.
  • the first downlink control information includes DMRS antenna port indication information.
  • the DMRS antenna port indication information is used to indicate the first sequence value corresponding to the n terminal devices.
  • the first sequence value is used to determine the DMRS antenna port combination corresponding to n terminal devices.
  • the first sequence value includes the indication information of the corresponding relationship between the n terminal devices and the DMRS antenna port combination, for example, it may be the index value of the DMRS antenna port combination corresponding to the n terminal devices.
  • the terminal device may determine the DMRS antenna port combination corresponding to n terminal devices from the first correspondence table according to the first sequence value.
  • the terminal device may determine the first correspondence table according to a predefined manner, or may obtain the first correspondence table from the network device.
  • the determination manner of the above-mentioned first correspondence table includes the following two, respectively:
  • Manner 1 The network device sends the first information to n terminal devices, and the terminal device receives the first information from the network device, thereby determining the first correspondence table.
  • the first information includes a first correspondence table.
  • the network device may send high-level signaling to the terminal device, and the high-level signaling carries the first information.
  • the high-level signaling may be radio resource control (radio resource control, RRC).
  • RRC radio resource control
  • the configuration or update time for high-level signaling is generally tens to hundreds of milliseconds. In a low-moving-rate multi-user MIMO system, the quasi-static channel remains unchanged for a certain period of time. Therefore, high-level signaling can be used to configure the first correspondence Relational tables.
  • the network device sends second information to n terminal devices, and the second information can be configured through RRC signaling and sent to the n terminal devices.
  • the second information may include the value of n and the total number of layers of data transmitted by n terminal devices in parallel, and may also include configuration information of multiple parameters such as dmrs_config_type, DL_dmrs_config_maxlength, transform and precoder.
  • Different numbers of terminal devices and the total number of layers of parallel transmission data may correspond to different first correspondence tables, and the second information is used for n terminal devices to determine the first correspondence table according to the predefined first relationship table set.
  • a relationship table set includes at least one first corresponding relationship table, and the first corresponding relationship table includes a corresponding relationship between at least one first sequence value and at least one second sequence value and a DMRS antenna port.
  • the first relationship table set includes a plurality of first correspondence relationship tables, because different numbers of terminal devices and the total number of parallel transmission data layers correspond to different first correspondence relationship tables. Therefore, the terminal device can determine the first correspondence table from the predefined first relationship table set according to the second information.
  • both the network device and the terminal device store the predefined first relationship table set.
  • the first sequence value is the index value of the DMRS antenna port combination corresponding to n terminal devices.
  • Table 11 when the value of n is 3 and the total number of layers of data transmitted by 3 terminal devices in parallel is 8, Table 11 is a possible form of expression of the first correspondence table.
  • the corresponding relationship of the antenna ports with the first sequence value of 0-11 indicates that the number of layers for parallel transmission of data by 3 terminal devices is 2, 2, and 4 respectively, and the corresponding relationship of the antenna ports with the first sequence value of 12-15 indicates 3
  • the number of layers for the terminal equipment to transmit data in parallel is 1, 3, and 4 respectively.
  • the DMRS antenna port combination corresponding to n terminal devices can be determined through the first correspondence table and the first sequence value. For example, if the first sequence value is 0, the three terminal devices correspond to the antenna port combination: (port0, port 1) , (Port 4, port 5) and (port 2, port 3, port 6, port 7).
  • the first correspondence table includes at least one first sequence value and at least one second sequence value, the correspondence relationship with the DMRS antenna port. Therefore, as a possible embodiment, as shown in FIG. 5, the method provided in the embodiment of the present application further includes before S104:
  • the network device sends first indication information to n terminal devices.
  • the network device in the embodiment of the present application may separately send the first indication information to each of the n terminal devices through the second downlink control information.
  • the first indication information is carried in second downlink control information, and the second downlink control information is sent for each terminal device and is used to carry the first indication information.
  • the network device may also send the first indication information to each of the n terminal devices through high-level signaling.
  • the first indication information is used to indicate the second sequence value corresponding to each of the n terminal devices.
  • the second sequence value may be an index value indicating the pairing sequence of n terminal devices.
  • the terminal device receives the first indication information from the network device.
  • the terminal device can determine the antenna port corresponding to each of the three terminal devices by combining the first sequence value and the second sequence value.
  • the antenna ports corresponding to the terminal device are antenna port 2, antenna port 3, antenna port 6, and antenna port 7. Therefore, the antenna port corresponding to each of the three terminal devices can be determined through the second sequence value.
  • the network device determines m target groups according to the n terminal devices.
  • the n terminal devices include m target groups, and m is an integer greater than or equal to 2.
  • the frequency domain resources used for terminal device transmission in the same target group in the m target groups are the same, and the m target groups are different targets
  • the frequency domain resources used for the terminal device to transmit data in the group are not completely the same, that is, the frequency domain resources used for the terminal device to transmit data in different target groups may be completely different, or some of them may be the same.
  • S102 in the embodiment of the present application may also be implemented in the following manner: the first downlink control information may include m third downlink control information, and the network device sends a message to each of the m target groups The target groups send respective corresponding third downlink control information, where the third downlink control information corresponding to any target group is used to instruct terminal devices in any target group to transmit data.
  • the third downlink control information 1 is used to instruct the terminal devices in the target group 1 to transmit data
  • the third downlink control information 2 is used to instruct the terminal devices in the target group 2 to transmit data
  • the third downlink control information 1 and the first Third, the downlink control information 2 is different.
  • the terminal devices in the m target groups may determine the DMRS antenna port corresponding to the corresponding target group from the first correspondence table obtained in the above manner 1 or manner 2 according to the first sequence value in the corresponding third downlink control information. combination.
  • the target group 1 corresponds to the third downlink control information 1
  • the third downlink control information 1 contains the first sequence value
  • the terminal equipment in the target group 1 can be determined from the first correspondence table according to the first sequence value DMRS antenna port combination used by all terminal devices in target group 1.
  • S105 in the embodiment of the present application can also be implemented in the following manner: the network device sends the first indication information to each terminal device in each target group of the m target groups through high-level signaling or second downlink control information.
  • the first indication information is used to indicate the second sequence value corresponding to each terminal device in each target group in the m target groups.
  • Each terminal device can determine its corresponding DMRS antenna port according to the first sequence value and the second sequence value.
  • the method for each terminal device to determine the DMRS antenna port can refer to S105, which will not be repeated here.
  • the method provided in this embodiment of the present application further includes after S106:
  • the network device sends the group identifier of the first target group to the terminal device of the first target group.
  • the group identifier of the first target group in the embodiment of the present application may be carried in the first downlink control information.
  • the network device may send the group identifier of the first target group to the terminal device of the first target group through high-level signaling.
  • the first correspondence table further includes: a correspondence between at least one group identifier and a DMRS antenna port.
  • the group identifier is used to enable the terminal devices belonging to the first target group to determine that they belong to the first target group, and the first target group is any one of the m target groups.
  • the terminal device receives the group identifier of the first target group from the network device.
  • the terminal device 1 may determine according to the group identifier that the first target group includes the terminal device 1 and the terminal device 2, and then determine the index value indicating the pairing sequence of the terminal device 1 through the second sequence value, and then it can be determined that the terminal device 1 corresponds to DMRS antenna port.
  • the first downlink control information involved in the embodiment of the present application may also include second indication information.
  • the second indication information is used to indicate the frequency used by n terminal devices for data transmission. Domain resources.
  • the network device sends second indication information to n terminal devices, and n terminal devices can follow the second indication The information determines frequency domain resources.
  • the frequency domain resources of the n terminal devices do not completely overlap, that is, the frequency domain resources used by the n terminal devices to transmit data are not the same (no overlap) or not completely the same (there may be partial overlap).
  • at least two of the n terminal devices may use the same frequency domain resources for data transmission, while the frequency domain resources used by other terminal devices for data transmission are not completely the same. It may also be each terminal in the n terminal devices.
  • the frequency domain resources used by devices to transmit data are not completely the same.
  • the network device determines m target groups according to n terminal devices. For specific implementation, refer to S106, which will not be repeated here.
  • the network device respectively sends second indication information to each of the m target groups, and each target group determines the frequency domain resource of the corresponding target group according to the corresponding second indication information.
  • the network device sends the second indication information 1 to the target group 1, and sends the second indication information 2 to the target group 2.
  • the second indication information 1 is carried in the first downlink control information 1, and the second indication information 2 It is carried in the first downlink control information 2.
  • the target group 1 can determine the frequency domain resources of the target group 1 according to the second indication information 1, and the target group 2 can determine the frequency domain resources of the target group 2 according to the second indication information 2.
  • Example 1 When the frequency domain resource allocation type is type 0, the number of RBGs is determined according to the partial bandwidth and the configuration type, and the available RBGs are determined through the second indication information.
  • the second indication information includes at least one first bit and at least one second bit. The first bit is used to indicate that the frequency domain resource associated with the first bit is available, and the second bit is used to indicate that the frequency domain resource associated with the second bit is not available.
  • the n terminal devices determine the configured RBG resources based on the second indication information.
  • the second bit may be “0” and the first bit may be “1".
  • the network device determines that the number of RBGs is 8, and uses an 8-bit bitmap in the DCI to indicate the frequency domain resources that the terminal device should use.
  • the bitmap can be 10001101, indicating that the frequency domain resources associated with the location of the 1, 5, 6, and 8 RBGs (the value of the corresponding position is 1) are available, and the remaining 4 RBGs (the value of the corresponding position is 0) is not available.
  • the n terminal devices can determine the configured RBG resources based on the indication of the bitmap.
  • the second indication information includes a resource indication value, and the resource indication value is used to determine the frequency domain resource starting point of n terminal devices and the continuous resource block of the frequency domain resource Length, the starting point of the frequency domain resources of each terminal device may be the same or not completely the same.
  • the starting points of frequency domain resources are not completely the same. It may be that the starting points of frequency domain resources of some terminal devices are the same, and the starting points of frequency domain resources of another part of terminal devices are different.
  • the continuous resource block lengths of the frequency domain resources of the n terminal devices may also be the same or not completely the same, which will not be repeated here.
  • the second indication information may be a resource indication value (RIV) field in the first downlink control information.
  • the number of bits of the resource indication value is Among them, n 1 represents the bandwidth length of the current part of the bandwidth, which is a known value pre-configured by the network device.
  • the terminal device may determine the RIV according to the number of bits. For example, when the value of 4bit is 1111, the value of RIV is 16; when the value of 4bit is 0000, the value of RIV is 1.
  • the terminal device can determine the corresponding frequency domain resource starting point RB start and the continuous resource block length L RB of the frequency domain resource according to the RIV.
  • the terminal device can pass Determine RB start and L RB , where The remainder of is RB start and the quotient is L RB -1.
  • RB start is 0, and L RB is 5.
  • the terminal device After determining RB start and L RB , the terminal device also needs to verify RB start and L RB :
  • each terminal device needs a 10-bit bitmap to indicate the RBG position that should be scheduled, and the 3 paired users need 30 bits in total.
  • the first DCI uniformly indicates the RBG positions that the three paired terminal devices should schedule, and only 10 bits are required. Therefore, compared with the prior art, the embodiment of the present application can save 67% of the DCI frequency domain resource indication overhead.
  • the first downlink control information involved in the embodiment of this application further includes third indication information, and the third indication information is used to indicate the time domain resources used by n terminal devices for data transmission. .
  • the network device Since the n terminal devices that are paired completely overlap in the time domain resource occupation, when the network device and the terminal device perform data transmission, the network device only needs to send a common DCI to the n terminal devices to indicate the time domain configuration.
  • the value of m requires 4bit indication (16 possible values). If indicated separately, the time domain resource indication of 3 terminal devices requires 12bit for DCI overhead, and Through the first DCI in the embodiment of the present application, the three paired terminal devices are uniformly indicated, and only a 4-bit indication is required, which can save 67% of the DCI time domain resource indication overhead.
  • the first downlink control information involved in the embodiment of this application further includes fourth indication information, which is used to indicate the HARQ process used by n terminal devices for data transmission Instructions.
  • the current NR system can support the transmission of up to 16 processes, the more terminal devices that are paired, the more processes there will be. According to the number of paired terminal devices, that is, the value of n, the maximum supported by each terminal device can be determined The number of processes. The value of n is included in the fourth indication information.
  • the number of paired terminal devices is 3
  • a single terminal device supports a maximum of 8 processes, and each terminal device needs 3 bits for indication, so the total HARQ process indication overhead in the first downlink control information is 9 bits.
  • each terminal device requires 4 bits for indication, and 3 terminal devices require 12 bits. Therefore, the embodiment of the present application can save 25% of the DCI HARQ process indication overhead.
  • the first downlink control information involved in the embodiment of the present application further includes fifth indication information, and the fifth indication information is used to indicate the NDI indication used when n terminal devices perform data transmission.
  • a single terminal device needs 1 bit to indicate whether the NDI is reversed.
  • the first downlink control information involved in the embodiment of the present application further includes sixth indication information, and the sixth indication information is used to indicate an RV indication used when n terminal devices perform data transmission.
  • the RV number of a single terminal device needs to be indicated by 2 bits.
  • a sequence of n*2 bits can be defined in the first downlink control information according to the number n of paired terminal devices to indicate the respective RV numbers of n terminal devices.
  • each device such as a network device, a terminal device, etc.
  • each device includes a hardware structure and/or software module corresponding to each function.
  • the present application can be implemented in the form of hardware or a combination of hardware and computer software. Whether a certain function is executed by hardware or computer software-driven hardware depends on the specific application and design constraint conditions of the technical solution. Professionals and technicians can use different methods for each specific application to implement the described functions, but such implementation should not be considered beyond the scope of this application.
  • the embodiments of the present application may divide network devices and terminal devices into functional units according to the foregoing method examples.
  • each functional unit may be divided corresponding to each function, or two or more functions may be integrated into one processing unit.
  • the above-mentioned integrated unit can be implemented in the form of hardware or software functional unit. It should be noted that the division of units in the embodiments of the present application is illustrative, and is only a logical function division, and there may be other division methods in actual implementation.
  • FIG. 6 shows a data transmission device involved in the foregoing embodiment.
  • the data transmission device may include: a processing unit 101 and a communication unit 102.
  • the data transmission device is a network device, or a chip applied to the network device.
  • the communication unit 102 is configured to support the data transmission apparatus to execute S102 executed by the network device in the foregoing embodiment.
  • the processing unit 101 is configured to support the data transmission apparatus to execute S101 executed by the network device in the foregoing embodiment.
  • the communication unit 102 is further configured to support the data transmission apparatus to execute S105a and S107a performed by the network device in the foregoing embodiment. It is also used to support the data transmission apparatus to execute S106 executed by the network device in the foregoing embodiment.
  • the data transmission apparatus is a terminal device or a chip applied to the terminal device.
  • the processing unit 101 is configured to support the data transmission apparatus to execute S104 executed by the terminal device in the foregoing embodiment.
  • the communication unit 102 is configured to support the data transmission apparatus to execute S103 executed by the terminal device in the foregoing embodiment.
  • the communication unit 102 is further configured to support the data transmission apparatus to execute S105b and S107b executed by the terminal device in the foregoing embodiment.
  • the data transmission device may also include a storage unit.
  • the storage unit is used to store computer program code, and the computer program code includes instructions. If the data transmission device is applied to a network device, the storage unit can be a storage unit in the chip (for example, a register, cache, etc.), or a storage unit outside the chip in the network device (for example, read-only Memory, random access memory, etc.).
  • FIG. 7 shows a schematic diagram of a possible logical structure of the data transmission device involved in the foregoing embodiment.
  • the data transmission device includes: a processing module 112 and a communication module 113.
  • the processing module 112 is used to control and manage the actions of the data transmission device.
  • the processing module 112 is used to perform information/data processing steps in the data transmission device.
  • the communication module 113 is used to support the steps of information/data sending or receiving in the data transmission device.
  • the data transmission device may further include a storage module 111 for storing program codes and data that the data transmission device can use.
  • the data transmission device is a network device or a chip applied to the network device.
  • the communication module 113 is used to support the data transmission apparatus to execute S102 executed by the network device in the foregoing embodiment.
  • the processing module 112 is configured to support the data transmission device to execute S101 in the foregoing embodiment.
  • the communication module 113 is also used to support the data transmission apparatus to execute S105a and S107a executed by the network device in the foregoing embodiment.
  • the processing module 112 is also configured to support the data transmission apparatus to execute S106 executed by the network device in the foregoing embodiment.
  • the communication module 113 is used to support the data transmission apparatus to execute S103 executed by the network device in the foregoing embodiment.
  • the processing module 112 is configured to support the data transmission apparatus to execute S104 executed by the network device in the foregoing embodiment.
  • the communication module 113 is also used to support the data transmission apparatus to execute S105b and S107b executed by the terminal device in the foregoing embodiment.
  • the processing module 112 may be a processor or a controller, for example, a central processing unit, a general-purpose processor, a digital signal processor, an application specific integrated circuit, a field programmable gate array or other programmable logic devices, transistor logic devices, Hardware components or any combination thereof. It can implement or execute various exemplary logical blocks, modules and circuits described in conjunction with the disclosure of the present invention.
  • the processor may also be a combination of computing functions, for example, a combination of one or more microprocessors, a combination of a digital signal processor and a microprocessor, and so on.
  • the communication module 113 may be a transceiver, a transceiver circuit, or a communication interface.
  • the storage module 111 may be a memory.
  • the processing module 112 is the processor 41 or the processor 45
  • the communication module 113 is the communication interface 43 or the transceiver
  • the storage module 111 is the memory 42
  • the data transmission device involved in this application may be the communication device shown in FIG. 8 .
  • the communication device includes a processor 41, a communication line 44, and at least one communication interface (in FIG. 8 it is only an example and the communication interface 43 is included as an example for illustration).
  • the communication device may further include a memory 42.
  • the processor 41 may be a general-purpose central processing unit (CPU), a microprocessor, an application-specific integrated circuit (ASIC), or one or more programs for controlling the execution of the program of this application. integrated circuit.
  • CPU central processing unit
  • ASIC application-specific integrated circuit
  • the communication line 44 may include a path to transmit information between the aforementioned components.
  • the communication interface 43 uses any device such as a transceiver to communicate with other devices or communication networks, such as Ethernet, radio access network (RAN), wireless local area networks (WLAN), etc. .
  • RAN radio access network
  • WLAN wireless local area networks
  • the memory 42 may be a read-only memory (ROM) or other types of static storage devices that can store static information and instructions, random access memory (RAM), or other types that can store information and instructions
  • the dynamic storage device can also be electrically erasable programmable read-only memory (EEPROM), compact disc read-only memory (CD-ROM) or other optical disk storage, optical disc storage (Including compact discs, laser discs, optical discs, digital versatile discs, Blu-ray discs, etc.), magnetic disk storage media or other magnetic storage devices, or can be used to carry or store desired program codes in the form of instructions or data structures and can be used by a computer Any other media accessed, but not limited to this.
  • the memory can exist independently and is connected to the processor through the communication line 44. The memory can also be integrated with the processor.
  • the memory 42 is used to store computer-executable instructions for executing the solution of the present application, and the processor 41 controls the execution.
  • the processor 41 is configured to execute computer-executable instructions stored in the memory 42 to implement the data transmission method provided in the following embodiments of the present application.
  • the computer-executable instructions in the embodiments of the present application may also be referred to as application program code, which is not specifically limited in the embodiments of the present application.
  • the processor 41 may include one or more CPUs, such as CPU0 and CPU1 in FIG. 8.
  • the communication device may include multiple processors, such as the processor 41 and the processor 45 in FIG. 8.
  • processors can be a single-CPU (single-CPU) processor or a multi-core (multi-CPU) processor.
  • the processor here may refer to one or more devices, circuits, and/or processing cores for processing data (for example, computer program instructions).
  • FIG. 9 is a schematic structural diagram of a chip 150 provided by an embodiment of the present application.
  • the chip 150 includes one or more than two (including two) processors 1510 and a communication interface 1530.
  • the chip 150 further includes a memory 1540.
  • the memory 1540 may include a read-only memory and a random access memory, and provides operation instructions and data to the processor 1510.
  • a part of the memory 1540 may also include a non-volatile random access memory (NVRAM).
  • NVRAM non-volatile random access memory
  • the memory 1540 stores the following elements, execution modules or data structures, or their subsets, or their extended sets.
  • the corresponding operation is executed by calling the operation instruction stored in the memory 1540 (the operation instruction may be stored in the operating system).
  • the processor 1510 controls the processing operations of any one of the network device and the terminal device.
  • the processor 1510 may also be referred to as a central processing unit (CPU).
  • the memory 1540 may include a read-only memory and a random access memory, and provides instructions and data to the processor 1510.
  • a part of the memory 1540 may also include a non-volatile random access memory (NVRAM).
  • NVRAM non-volatile random access memory
  • the memory 1540, the communication interface 1530, and the memory 1540 are coupled together through a bus system 1520, where the bus system 1520 may include a power bus, a control bus, and a status signal bus in addition to a data bus.
  • various buses are marked as the bus system 1520 in FIG. 9.
  • the methods disclosed in the foregoing embodiments of the present application may be applied to the processor 1510 or implemented by the processor 1510.
  • the processor 1510 may be an integrated circuit chip with signal processing capabilities. In the implementation process, the steps of the foregoing method can be completed by hardware integrated logic circuits in the processor 1510 or instructions in the form of software.
  • the above-mentioned processor 1510 may be a general-purpose processor, a digital signal processing (digital signal processing, DSP), an application specific integrated circuit (ASIC), a field-programmable gate array (FPGA), or Other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components.
  • DSP digital signal processing
  • ASIC application specific integrated circuit
  • FPGA field-programmable gate array
  • Other programmable logic devices discrete gates or transistor logic devices, discrete hardware components.
  • the general-purpose processor may be a microprocessor or the processor may also be any conventional processor or the like.
  • the steps of the method disclosed in the embodiments of the present application may be directly embodied as being executed and completed by a hardware decoding processor, or executed and completed by a combination of hardware and software modules in the decoding processor.
  • the software module can be located in a mature storage medium in the field such as random access memory, flash memory, read-only memory, programmable read-only memory, or electrically erasable programmable memory, registers.
  • the storage medium is located in the memory 1540, and the processor 1510 reads the information in the memory 1540, and completes the steps of the foregoing method in combination with its hardware.
  • the communication interface 1530 is used to perform the receiving and sending steps of the network device or the terminal device in any of the foregoing embodiments.
  • the processor 1510 is configured to execute the processing steps of the network device or the terminal device in any of the foregoing embodiments.
  • the above communication unit may be an interface circuit or communication interface of the device for receiving signals from other devices.
  • the communication unit is an interface circuit or communication interface used by the chip to receive signals or send signals from other chips or devices.
  • the instructions stored in the memory for execution by the processor may be implemented in the form of a computer program product.
  • the computer program product may be written in the memory in advance, or it may be downloaded and installed in the memory in the form of software.
  • the computer program product includes one or more computer instructions.
  • the computer can be a general-purpose computer, a dedicated computer, a computer network, or other programmable devices.
  • Computer instructions can be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium.
  • computer instructions can be transmitted from a website, computer, server, or data center through a cable (such as Coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (such as infrared, wireless, microwave, etc.) means to transmit to another website, computer, server or data center.
  • a cable such as Coaxial cable, optical fiber, digital subscriber line (DSL)
  • wireless such as infrared, wireless, microwave, etc.
  • the computer-readable storage medium may be any available medium that can be stored by a computer or a data storage device such as a server or a data center integrated with one or more available media.
  • the usable medium may be a magnetic medium (for example, a floppy disk, a hard disk, and a magnetic tape), an optical medium (for example, a DVD), or a semiconductor medium (for example, a solid state disk, SSD).
  • a computer-readable storage medium stores instructions.
  • a network device or a chip applied to the network device executes S101 and S102 in the embodiment.
  • a computer-readable storage medium stores instructions.
  • the network device or the chip applied to the network device executes S105a, S106, and S107a in the embodiment. .
  • a computer-readable storage medium stores instructions.
  • the terminal device or a chip applied to the terminal device executes S103 and S104 in the embodiment.
  • a computer-readable storage medium stores instructions.
  • the terminal device or a chip applied to the terminal device executes S105b and S107b in the embodiment.
  • the aforementioned readable storage medium may include: U disk, mobile hard disk, read-only memory, random access memory, magnetic disk or optical disk and other media that can store program codes.
  • a computer program product including instructions is provided.
  • the computer program product stores instructions.
  • the network device or a chip applied to the network device executes S101 and S102 in the embodiment.
  • a computer program product including instructions is provided.
  • the computer program product stores instructions.
  • the network device or a chip applied to the network device executes S105a, S106, and S107a in the embodiment.
  • a computer program product including instructions.
  • the computer program product stores instructions.
  • the terminal device or a chip applied to the terminal device executes S103 and S104 in the embodiment.
  • a computer program product including instructions.
  • the computer program product stores instructions.
  • the terminal device or a chip applied to the terminal device executes S105b and S107b in the embodiment.
  • a chip is provided.
  • the chip is applied to a network device.
  • the chip includes at least one processor and a communication interface.
  • the communication interface is coupled to the at least one processor.
  • the processor is used to run instructions to execute S101 and S102 in the embodiment. .
  • a chip is provided.
  • the chip is applied to a network device.
  • the chip includes at least one processor and a communication interface, the communication interface is coupled to the at least one processor, and the processor is used to run instructions to execute S105a and S106 in the embodiment. , S107a.
  • a chip is provided.
  • the chip is applied to a terminal device.
  • the chip includes at least one processor and a communication interface.
  • the communication interface is coupled to the at least one processor.
  • the processor is used to run instructions to execute the terminal device in the embodiment.
  • a chip applied to a terminal device executes S103 and S104 in the embodiment.
  • a chip is provided.
  • the chip is applied to a terminal device.
  • the chip includes at least one processor and a communication interface, the communication interface is coupled to the at least one processor, and the processor is used to execute instructions to execute S105b and S107b in the embodiment. .
  • the above embodiments it may be implemented in whole or in part by software, hardware, firmware or any combination thereof.
  • a software program it may be implemented in the form of a computer program product in whole or in part.
  • the computer program product includes one or more computer instructions.
  • the computer program instructions When the computer program instructions are loaded and executed on the computer, the processes or functions according to the embodiments of the present application are generated in whole or in part.
  • the computer can be a general-purpose computer, a dedicated computer, a computer network, or other programmable devices.
  • 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.
  • computer instructions may be transmitted from a website, computer, server, or data center through a cable (such as Coaxial cable, optical fiber, digital subscriber line (digital subscriber line, referred to as DSL)) or wireless (such as infrared, wireless, microwave, etc.) transmission to another website site, computer, server or data center.
  • the computer-readable storage medium may be any available medium that can be accessed by a computer or includes one or more data storage devices such as a server or a data center that can be integrated with the medium.
  • the usable medium may be a magnetic medium (for example, a floppy disk, a hard disk, and a magnetic tape), an optical medium (for example, a DVD), or a semiconductor medium (for example, a solid state disk (SSD)).

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Abstract

本发明公开一种数据传输方法、装置及系统，涉及通信技术领域，用以解决向多个终端设备单独发送下行控制信息（DCI）进行数据传输指示时总的DCI开销过大的问题。该方法包括：网络设备确定第一DCI；所述网络设备向n个终端设备发送第一DCI；其中，所述第一DCI用于指示所述n个终端设备传输数据，所述n为大于或等于2的整数。基于该方案，可以节约发送DCI的总的资源开销，提升系统性能。

Description

一种数据传输方法、装置及系统
本申请要求于2019年07月31日提交国家知识产权局、申请号为201910704667.2、申请名称为“一种数据传输方法、装置及系统”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及通信技术领域，尤其涉及一种数据传输方法、装置及系统。
背景技术
多输入多输出(multiple-input multiple-output，MIMO)系统是指在发射端和接收端分别使用多个发射天线和接收天线，使信号通过发射端与接收端的多个天线传送和接收，从而充分利用空间资源、改善通信质量，在不增加频谱资源和天线发射功率的情况下，成倍的提高系统信道容量。
多用户MIMO(multiple user MIMO，MU-MIMO)系统是指同时服务多个终端设备的MIMO系统。不同的终端设备可以采用相同的时频资源向基站发送数据，基站也可以将占用相同时频资源的多个并行数据发送给不同的终端设备，从而实现多用户MIMO系统总的传输速率的提升。同时被服务的终端设备称为配对的终端设备，每个终端设备并行传输数据的数目称之为层数(layer)，不同层的数据可以以层映射的方式映射到不同的天线端口进行发送或被接收。
配对的终端设备无论是在物理上行共享信道(physical uplink shared channel，PUSCH)发送数据，还是在物理下行共享信道(physical downlink shared channel，PDSCH)接收数据，数据传输所需的配置信息(如时频资源位置、调制方式等)，都需要通过正确解读承载于物理下行控制信道(physical downlink control channel，PDCCH)的下行控制信息(downlink control information，DCI)来进行指示。
现有技术中，基站可以在PDCCH上为每个终端设备单独发送DCI以指示相应终端设备进行数据(例如，PDSCH和/或PUSCH)的传输。但是，为每个终端设备单独发送DCI进行数据的传输指示，可能会导致多个终端设备总的DCI资源开销过大。
发明内容
本申请实施例提供一种数据传输方法、装置及系统，用以解决向多个终端设备单独发送DCI进行数据传输指示时总的DCI开销过大的问题。
为了解决上述技术问题，本申请实施例提供如下技术方案：
第一方面，本申请实施例提供一种数据传输方法，包括：网络设备确定第一下行控制信息；网络设备向n个终端设备发送第一下行控制信息；其中，第一下行控制信息用于指示n个终端设备传输数据，n为大于或等于2的整数。
本申请实施例提供一种数据传输方法，网络设备通过向n个终端设备发送第一下行控制信息来指示n个终端设备的数据传输，相比现有技术为每个终端设备单独发送下行控制信息指示相比，可以节约发送下行控制信息的总的比特开销，提升系统性能。
在一种可能的实现方式中，该第一下行控制信息包括调制解调参考信号DMRS天线端口指示信息，该DMRS天线端口指示信息用于指示该n个终端设备对应的第一序列值。网络设备通过指示n个终端设备对应的第一序列值，以便于n个终端设备确定对应的DMRS天线端口组合。
在一种可能的实现方式中，本申请实施例提供的方法还包括：该网络设备向该n个终端设备发送第一信息，该第一信息包括第一对应关系表，该第一对应关系表包括至少一个第一序列值和至少一个第二序列值与DMRS天线端口的对应关系。网络设备可以向n个终端设备发送第一对应关系表，使n个终端设备可以根据该第一对应关系表确定至少一个第一序列值和至少一个第二序列值与DMRS天线端口的对应关系。
在一种可能的实现方式中，本申请实施例提供的方法还包括：该网络设备向该n个终端设备发送第二信息，该第二信息包括该n的值以及该n个终端设备并行传输数据的总层数，该第二信息用于该n个终端设备根据预定义的第一关系表集合确定第一对应关系表，该第一关系表集合包括至少一个该第一对应关系表，该第一对应关系表包括至少一个第一序列值和至少一个第二序列值与DMRS天线端口的对应关系。终端设备可以根据第二信息从预定义的第一关系表集合中确定第一对应关系表，通过预定义第一对应关系表的方式可以节约网络设备发送第二信息的传输资源。
在一种可能的实现方式中，本申请实施例提供的方法还包括：该网络设备向该n个终端设备发送第一指示信息，该第一指示信息用于指示该n个终端设备中每个终端设备对应的该第二序列值。通过第一序列值和第二序列值可以使每个终端设备从第一对应关系表中确定各自对应的DMRS天线端口。
在一种可能的实现方式中，该n个终端设备的频域资源不完全重叠时，该n个终端设备包括m个目标组，该m个目标组中同一个目标组内的用于终端设备传输数据的频域资源相同，该m个目标组中不同目标组内的用于终端设备传输数据的频域资源不完全相同，该m为大于或等于2的整数。通过将n个终端设备分组，可以使每个目标组内的终端设备传输数据的频域资源相同，解决n个终端设备的频域资源不完全重叠时，n个终端设备下行控制信息的指示问题。
在一种可能的实现方式中，该第一对应关系表还包括：至少一个组标识与DMRS天线端口的对应关系，该至少一个组标识与至少一个目标组对应。通过组标识与DMRS天线端口的对应关系可以确定目标组对应的DMRS天线端口。
在一种可能的实现方式中，本申请实施例提供的方法还包括：该网络设备向第一目标组的终端设备发送该第一目标组的组标识，该组标识用于使属于该第一目标组中的终端设备确定属于该第一目标组，该第一目标组为该m个目标组中的任一个。可以使第一目标组的终端设备确定该第一目标组。
在一种可能的实现方式中，该第一下行控制信息包括第二指示信息，该第二指示信息用于指示该n个终端设备进行数据传输时使用的频域资源。可以确定n个终端设备进行数据传输时使用的频域资源。
在一种可能的实现方式中，该频域资源的分配类型为离散频域资源时，该第二指示信息包括至少一个第一比特和至少一个第二比特，其中，该第一比特用于指示与该第一比特关联的频域资源可用，该第二比特用于指示与该第二比特关联的频域资源不 可用；该频域资源的分配类型为连续频域资源，该第二指示信息包括资源指示取值，该资源指示取值用于确定n个终端设备的频域资源起点和频域资源持续的连续资源块长度。可以解决频域资源离散以及连续时，频域资源的指示问题。
第二方面，本申请实施例提供一种数据传输方法，包括：终端设备接收来自网络设备的第一下行控制信息，该第一下行控制信息用于指示n个终端设备传输数据，该n为大于等于2的整数，该终端设备为该n个终端设备中的任一个；该终端设备根据该第一下行控制信息与该网络设备进行数据传输。
本申请实施例提供一种数据传输方法，n个终端设备通过接收第一下行控制信息确定各自对应的数据传输方式，相比现有技术每个终端设备单独进行下行控制信息指示，可以节约下行控制信息的比特开销，提升系统性能。
在一种可能的实现方式中，该第一下行控制信息包括调制解调参考信号DMRS天线端口指示信息，该DMRS天线端口指示信息用于指示该n个终端设备对应的第一序列值。
在一种可能的实现方式中，本申请实施例提供的方法还包括：该终端设备接收来自网络设备的第一信息，该第一信息包括该第一对应关系表，该第一对应关系表包括至少一个第一序列值和至少一个第二序列值与DMRS天线端口的对应关系。
在一种可能的实现方式中，本申请实施例提供的方法还包括：该终端设备接收来自网络设备的第二信息，该第二信息包括该n的值以及该n个终端设备并行传输数据的总层数；该终端设备根据该第二信息，从预定义的第一关系表集合中确定第一对应关系表。
在一种可能的实现方式中，本申请实施例提供的方法还包括：该终端设备接收来自该网络设备的第一指示信息，该第一指示信息用于指示该n个终端设备中每个终端设备对应的第二序列值；该终端设备根据该第一序列值以及该第二序列值，从该第一对应关系表中确定该终端设备对应的DMRS天线端口。
在一种可能的实现方式中，该n个终端设备的频域资源不完全重叠时，该n个终端设备包括m个目标组，该m个目标组中同一个目标组内的用于终端设备传输数据的频域资源相同，该m个目标组中不同目标组内的用于终端设备传输数据的频域资源不完全相同，该m为大于或等于2的整数。
在一种可能的实现方式中，该第一对应关系表还包括：至少一个组标识与DMRS天线端口的对应关系。
在一种可能的实现方式中，本申请实施例提供的方法还包括：该终端设备接收来自该网络设备的第一目标组的组标识，该组标识用于使属于该第一目标组中的终端设备确定属于该第一目标组，该第一目标组为该m个目标组中的任一个；该终端设备根据该组标识确定该终端设备属于该第一目标组。
在一种可能的实现方式中，该第一下行控制信息包括第二指示信息，该第二指示信息用于指示该n个终端设备进行数据传输时使用的频域资源。
在一种可能的实现方式中，该频域资源的分配类型为离散频域资源，该第二指示信息包括至少一个第一比特和至少一个第二比特，其中，该第一比特用于指示与该第一比特关联的频域资源可用，该第二比特用于指示与该第二比特关联的频域资源不可 用；该频域资源的分配类型为连续频域资源，该第二指示信息包括资源指示取值，该资源指示取值用于确定n个终端设备的频域资源起点和频域资源持续的连续资源块长度。
第三方面，本申请实施例提供一种数据传输装置，该数据传输装置可以实现第一方面或第一方面的任意可能的实现方式中的方法，因此也能实现第一方面或第一方面任意可能的实现方式中的有益效果。该数据传输装置可以为网络设备，也可以为可以支持网络设备实现第一方面或第一方面的任意可能的实现方式中的方法的装置，例如应用于网络设备中的芯片。该装置可以通过软件、硬件、或者通过硬件执行相应的软件实现上述方法。
一种示例，本申请实施例提供一种数据传输装置，包括：处理单元，用于确定第一下行控制信息；通信单元，用于向n个终端设备发送第一下行控制信息；其中，该第一下行控制信息用于指示该n个终端设备传输数据，该n为大于或等于2的整数。
在一种可能的实现方式中，该第一下行控制信息包括调制解调参考信号DMRS天线端口指示信息，该DMRS天线端口指示信息用于指示该n个终端设备对应的第一序列值。
在一种可能的实现方式中，该通信单元，还用于向该n个终端设备发送第一信息，该第一信息包括第一对应关系表，该第一对应关系表包括至少一个第一序列值和至少一个第二序列值与DMRS天线端口的对应关系。
在一种可能的实现方式中，该通信单元，还用于向该n个终端设备发送第二信息，该第二信息包括该n的值以及该n个终端设备并行传输数据的总层数，该第二信息用于该n个终端设备根据预定义的第一关系表集合确定第一对应关系表，该第一关系表集合包括至少一个该第一对应关系表，该第一对应关系表包括至少一个第一序列值和至少一个第二序列值与DMRS天线端口的对应关系。
在一种可能的实现方式中，该通信单元，还用于向该n个终端设备发送第一指示信息，该第一指示信息用于指示该n个终端设备中每个终端设备对应的该第二序列值。
在一种可能的实现方式中，该n个终端设备的频域资源不完全重叠时，该n个终端设备包括m个目标组，该m个目标组中同一个目标组内的用于终端设备传输数据的频域资源相同，该m个目标组中不同目标组内的用于终端设备传输数据的频域资源不完全相同，该m为大于或等于2的整数。
在一种可能的实现方式中，该第一对应关系表还包括：至少一个组标识与DMRS天线端口的对应关系，该至少一个组标识与至少一个目标组对应。
在一种可能的实现方式中，该通信单元，还用于向第一目标组的终端设备发送该第一目标组的组标识，该组标识用于使属于该第一目标组中的终端设备确定属于该第一目标组，该第一目标组为该m个目标组中的任一个。
在一种可能的实现方式中，该第一下行控制信息包括第二指示信息，该第二指示信息用于指示该n个终端设备进行数据传输时使用的频域资源。
在一种可能的实现方式中，该频域资源的分配类型为离散频域资源时，该第二指示信息包括至少一个第一比特和至少一个第二比特，其中，该第一比特用于指示与该第一比特关联的频域资源可用，该第二比特用于指示与该第二比特关联的频域资源不 可用；该频域资源的分配类型为连续频域资源，该第二指示信息包括资源指示取值，该资源指示取值用于确定n个终端设备的频域资源起点和频域资源持续的连续资源块长度。
另一种示例，本申请实施例提供一种数据传输装置，该数据传输装置可以是网络设备，也可以是网络设备内的芯片。该数据传输装置可以包括：通信单元和处理单元。当该数据传输装置是网络设备时，该通信单元可以为通信接口或接口电路。该处理单元可以是处理器。该处理单元执行该存储单元所存储的指令，以使该数据传输装置实现第一方面或第一方面的任意一种可能的实现方式中描述的方法。当该数据传输装置是网络设备内的芯片时，该处理单元可以是处理器，该通信单元可以统称为：通信接口。
可选的，处理器、通信接口和存储器相互耦合。
第四方面，本申请实施例提供一种数据传输装置，该数据传输装置可以实现第二方面或第二方面的任意可能的实现方式中的方法，因此也能实现第二方面或第二方面任意可能的实现方式中的有益效果。该通信装置可以为终端设备，也可以为可以支持终端设备实现第二方面或第二方面的任意可能的实现方式中的方法的装置，例如应用于终端设备中的芯片。该装置可以通过软件、硬件、或者通过硬件执行相应的软件实现上述方法。
一种示例，本申请实施例提供一种数据传输装置，该数据传输装置包括：通信单元，用于接收来自网络设备的第一下行控制信息，该第一下行控制信息用于指示n个终端设备传输数据，该n为大于等于2的整数，该终端设备为该n个终端设备中的任一个；该通信单元，还用于根据该第一下行控制信息与该网络设备进行数据传输。
在一种可能的实现方式中，该第一下行控制信息包括调制解调参考信号DMRS天线端口指示信息，该DMRS天线端口指示信息用于指示该n个终端设备对应的第一序列值。
在一种可能的实现方式中，该通信单元，还用于接收来自网络设备的第一信息，该第一信息包括该第一对应关系表，该第一对应关系表包括至少一个第一序列值和至少一个第二序列值与DMRS天线端口的对应关系。
在一种可能的实现方式中，该通信单元，还用于接收来自网络设备的第二信息，该第二信息包括该n的值以及该n个终端设备并行传输数据的总层数；该装置还包括：处理单元，用于根据该第二信息，从预定义的第一关系表集合中确定第一对应关系表，该第一关系表集合包括至少一个该第一对应关系表。
在一种可能的实现方式中，该通信单元，还用于接收来自该网络设备的第一指示信息，该第一指示信息用于指示该n个终端设备中每个终端设备对应的第二序列值；该处理单元，还用于根据该第一序列值以及该第二序列值，从该第一对应关系表中确定该终端设备对应的DMRS天线端口。
在一种可能的实现方式中，该n个终端设备的频域资源不完全重叠时，该n个终端设备包括m个目标组，该m个目标组中同一个目标组内的用于终端设备传输数据的频域资源相同，该m个目标组中不同目标组内的用于终端设备传输数据的频域资源不完全相同，该m为大于或等于2的整数。
在一种可能的实现方式中，该第一对应关系表还包括：至少一个组标识与DMRS天线端口的对应关系，该至少一个组标识与至少一个目标组对应。
在一种可能的实现方式中，该通信单元，还用于接收来自该网络设备的第一目标组的组标识，该组标识用于使属于该第一目标组中的终端设备确定属于该第一目标组，该第一目标组为该m个目标组中的任一个；该处理单元，还用于根据该组标识确定该终端设备属于该第一目标组。
在一种可能的实现方式中，该第一下行控制信息包括第二指示信息，该第二指示信息用于指示该n个终端设备进行数据传输时使用的频域资源。
在一种可能的实现方式中，该频域资源的分配类型为离散频域资源，该第二指示信息包括至少一个第一比特和至少一个第二比特，其中，该第一比特用于指示与该第一比特关联的频域资源可用，该第二比特用于指示与该第二比特关联的频域资源不可用；该频域资源的分配类型为连续频域资源，该第二指示信息包括资源指示取值，该资源指示取值用于确定n个终端设备的频域资源起点和频域资源持续的连续资源块长度。
另一种示例，本申请实施例提供一种数据传输装置，该数据传输装置可以是终端设备，也可以是终端设备内的芯片。该数据传输装置可以包括：通信单元和处理单元。当该数据传输装置是终端设备时，该通信单元可以为通信接口或接口电路。该数据传输装置还可以包括存储单元。该处理单元可以是处理器。该处理单元执行该存储单元所存储的指令，以使该数据传输装置实现第二方面或第二方面的任意一种可能的实现方式中描述的方法。当该数据传输装置是终端设备内的芯片时，该处理单元可以是处理器，该通信单元可以统称为：通信接口。该处理单元执行存储单元所存储的计算机程序代码，以使该终端设备实现第二方面或第二方面的任意一种可能的实现方式中描述的方法。
可选的，处理器、通信接口和存储器相互耦合。
第五方面，本申请实施例提供一种计算机可读存储介质，计算机可读存储介质中存储有计算机程序或指令，当计算机程序或指令在计算机上运行时，使得计算机执行如第一方面至第一方面的任意一种可能的实现方式中描述的数据传输方法。
第六方面，本申请实施例提供一种计算机可读存储介质，计算机可读存储介质中存储有计算机程序或指令，当计算机程序或指令在计算机上运行时，使得计算机执行如第二方面至第二方面的任意一种可能的实现方式中描述的数据传输方法。
第七方面，本申请实施例提供一种包括指令的计算机程序产品，当指令在计算机上运行时，使得计算机执行第一方面或第一方面的各种可能的实现方式中描述的一种数据传输方法。
第八方面，本申请提供一种包括指令的计算机程序产品，当指令在计算机上运行时，使得计算机执行第二方面或第二方面的各种可能的实现方式中描述的一种数据传输方法。
第九方面，本申请实施例提供一种通信装置，该通信装置包括处理器和存储器，该存储器存储有指令，该指令被该处理器运行时，实现如第一方面或第一方面的各种可能的实现方式描述的数据传输方法。
第十方面，本申请实施例提供一种通信装置，该通信装置包括处理器和存储器，该存储器存储有指令，该指令被该处理器运行时，实现如第二方面或第二方面的各种可能的实现方式描述的数据传输方法。
第十一方面，本申请实施例提供了一种通信装置，该通信装置包括一个或者多个模块，用于实现上述第一方面、第二方面的方法，该一个或者多个模块可以与上述第一方面、第二方面的方法中的各个步骤相对应。
第十二方面，本申请实施例提供一种芯片，该芯片包括处理器和通信接口，通信接口和处理器耦合，处理器用于运行计算机程序或指令，以实现第一方面或第一方面的各种可能的实现方式中所描述的一种数据传输方法。通信接口用于与该芯片之外的其它模块进行通信。
第十三方面，本申请实施例提供一种芯片，该芯片包括处理器和通信接口，通信接口和处理器耦合，处理器用于运行计算机程序或指令，以实现第二方面或第二方面的各种可能的实现方式中所描述的一种数据传输方法。通信接口用于与芯片之外的其它模块进行通信。
具体的，本申请实施例中提供的芯片还包括存储器，用于存储计算机程序或指令。
第十四方面，本申请实施例提供一种通信系统，该通信系统包括如下中任一个或多个：第三方面及各种可能的实现方式中描述的数据传输装置，第四方面及第四方面的各种可能的实现方式中描述的数据传输装置。
上述提供的任一种装置或计算机可读存储介质或计算机程序产品或芯片均用于执行上文所提供的对应的方法，因此，其所能达到的有益效果可参考上文提供的对应的方法中对应方案的有益效果，此处不再赘述。
附图说明
图1为可适用于本申请实施例的一种通信系统的应用场景示意图；
图2为可适用于本申请实施例的一种通信系统的结构示意图；
图3为本申请实施例提供的下行控制信息指示数据传输的示意图；
图4为本申请实施例提供的DMRS天线端口分配示意图；
图5为本申请实施例提供的一种数据传输方法的流程示意图；
图6为本申请实施例提供的一种数据传输装置的结构示意图；
图7为本申请实施例提供的另一种数据传输装置的结构示意图；
图8为本申请实施例提供的一种通信设备的结构示意图；
图9为本申请实施例提供的一种芯片的结构示意图。
具体实施方式
本申请实施例中的术语“至少一个(种)”包括一个(种)或多个(种)。“多个(种)”是指两个(种)或两个(种)以上。例如，A、B和C中的至少一种，包括：单独存在A、单独存在B、同时存在A和B、同时存在A和C、同时存在B和C，以及同时存在A、B和C。在本申请中，除非另有说明，“/”表示或的意思，例如，A/B可以表示A或B；本文中的“和/或”仅仅是一种描述关联对象的关联关系，表示可以存在三种关系，例如A和/或B，可以表示：单独存在A，同时存在A和B，单独存在B这三种情况。“多个”是指两个或多于两个。
为了便于清楚描述本申请实施例的技术方案，本申请的实施例中采用了“第一”、“第二”等字样对功能和作用基本相同的相同项或相似项进行区分。本领域技术人员可以理解“第一”、“第二”等字样并不对数量和执行次序进行限定，且“第一”、“第二”等字样也并不限定一定不同。
需要说明的是，本申请中，“示例性的”或者“例如”等词用于表示作例子、例证或说明。本申请中被描述为“示例性的”或者“例如”的任何实施例或设计方案不应被解释为比其他实施例或设计方案更优选或更具优势。确切而言，使用“示例性的”或者“例如”等词旨在以具体方式呈现相关概念。
本申请实施例的技术方案可以应用于各种通信系统，例如：码分多址(code division multiple access，CDMA)、时分多址(time division multiple access，TDMA)、频分多址(frequency division multiple access，FDMA)、正交频分多址(orthogonal frequency-division multiple access，OFDMA)、单载波频分多址(single carrier FDMA，SC-FDMA)和其它系统等。术语“系统”可以和“网络”相互替换。CDMA系统可以实现例如通用无线陆地接入(universal terrestrial radio access，UTRA)、CDMA2000等无线技术。UTRA可以包括宽带CDMA(wideband CDMA，WCDMA)技术和其它CDMA变形的技术。CDMA2000可以覆盖过渡标准(interim standard，IS)2000(IS-2000)，IS-95和IS-856标准。TDMA系统可以实现例如全球移动通信系统(global system for mobile communication，GSM)等无线技术。OFDMA系统可以实现诸如演进通用无线陆地接入(evolved UTRA，E-UTRA)、超级移动宽带(ultra mobile broadband，UMB)、IEEE 802.11(Wi-Fi)，IEEE 802.16(WiMAX)，IEEE 802.20，Flash OFDMA等无线技术。UTRA和E-UTRA是UMTS以及UMTS演进版本。3GPP在长期演进(long term evolution，LTE)和基于LTE演进的各种版本是使用E-UTRA的UMTS的新版本。5G通信系统、新空口(new radio，NR)是正在研究当中的下一代通信系统。此外，通信系统还可以适用于面向未来的通信技术，都适用本申请实施例提供的技术方案。
本申请实施例描述的系统架构以及业务场景是为了更加清楚的说明本申请实施例的技术方案，并不构成对于本申请实施例提供的技术方案的限定，本领域普通技术人员可知，随着网络架构的演变和新业务场景的出现，本申请实施例提供的技术方案对于类似的技术问题，同样适用。本申请实施例中以提供的方法应用于NR系统或5G网络中为例进行说明。
在5G通信时代，海量机器类通信(massive machine type communication，mMTC)是NR系统中的主要应用场景之一。对于准静态信道，网络设备、终端设备和信道中散射体基本保持位置不变，因此，终端设备到网络设备的上行无线信道在百毫秒级的时间段内也基本保持不变。
例如针对高能力(high-end)终端的视频监控类应用场景，参考图1，该应用场景下，监控终端40可以将通过城市监控、交通监控、家庭监控和工厂监控生成的业务数据上行传输至网络设备10，网络设备10通过云端网络与本地服务器30通信。由于视频类业务数据包较大，数据传输较稳定，且多个监控终端长时间工作在相同频段范围，因此，由多个视频回传摄像头形成的多用户监控终端在配对完成后，在预设时间内不会发生变化。本申请实施例中的多用户MIMO系统可以包括类似于上述视频监控类应 用场景的准静态信道系统。
参考图2，图2示出了本申请实施例提供的一种通信系统的结构示意图，该通信系统为MU-MIMO系统，包括：网络设备10以及与该网络设备10通信的一个或多个终端设备20。
本申请实施例中一个或多个终端设备20中每个终端设备具有一个或多个天线端口(port)(例如，DMRS天线端口)，网络设备10也具有一个或多个天线端口。各个天线端口可以用于接收数据，也可以用于发送数据。例如，当终端设备20向网络设备10发送上行数据时，该终端设备20的一个或多个天线端口可以全部或部分用于发送数据。相应的，当终端设备20接收来自网络设备10的下行数据时，该终端设备20的一个或多个天线端口可以全部或部分用于接收数据。
需要说明的，除另有说明之外，本申请实施例中的天线端口都表示DMRS天线端口。
每个终端设备可以利用各自的天线端口向网络设备10发送上行数据，网络设备10可以通过一个或多个天线端口(例如，port1.1、port1.2等)接收来自每个终端设备的上行数据，以及通过一个或多个天线端口向每个终端设备发送下行数据。每个终端设备还可以利用各自的天线端口(例如，port2.1、port2.2等)接收来自网络设备10的下行数据。
网络设备10和一个或多个终端设备20之间可以采用MIMO技术通信。一个或多个终端设备20中不同的终端设备20可以采用相同的时频资源向网络设备10发送上行数据。或者网络设备可以将占用相同时频资源的多个并行下行数据发送给一个或多个终端设备20，实现多用户传输速率的提升。被服务的一个或多个终端设备20可以称为配对的终端设备(Paired UE)，每个终端设备并行传输数据的数目称之为层数(Layer)，不同层的数据以层映射的方式映射到不同的天线端口进行发送或者被接收，该同时服务多个用户的MIMO系统称之为多用户MIMO(Multiple User MIMO，MU-MIMO)。
配对的终端设备可以在PUSCH上向网络设备10发送上行数据，或在物理下行共享信道PDSCH上接收来自网络设备的下行数据。
终端设备20在接收下行数据时，需要知道网络设备10配置给终端设备20的调度信息，如时频资源的分配位置、调制编码的方式等。同样的，当终端设备20获得授权向网络设备10进行上行数据传输时，也需要按照网络设备10的指示的调度信息，进行相应位置和调制编码方式的数据发送。而所有这些调度信息都属于下行控制信息(Downlink Control Information，DCI)。因此，终端设备20需要通过正确解读承载于PDCCH的DCI来进行指示和调度。
下行的每个子帧包括控制区域和数据区域，通常，控制区域位于每个下行子帧(subframe)14个正交频分复用(Orthogonal Frequency Division Multiplexing，OFDM)符号的前1-3个符号。(当系统带宽为1.4MHz时，可能占用4个OFDM符号)，用于传输下行控制信令，如DCI，该下行控制信令对应的信道类型包括承载DCI的PDCCH。
参考图3，在控制区域包含多个PDCCH信道，该PDCCH信道的一个子帧中可以配置多个DCI，通过DCI中配置的字段可以指示PDSCH或PUSCH的正确传输。当 DCI的指示开销越大，同一子帧内用于数据传输的时频资源就越少。因此，需要尽量降低DCI开销，充分利用时频资源来传输有效数据。
在MU-MIMO系统中，网络设备可以根据接收到的多个终端设备对下行信道的反馈(例如：信道状态信息(Channel state information，CSI)或信道质量指示(channel quality indicator，CQI))以及网络设备侧的相关算法等，确定当前信道状态下最佳的配对的终端设备的数目、每个配对的终端设备并行传输数据的层数等。多个配对的终端设备可以占用相同的时频资源，也可以是占用的时域资源相同，但占用的频域资源不完全相同(占用的频域资源可以完全不同，也可以存在部分相同)。通过对空间资源的利用，实现多个终端设备的并行传输，改善系统的并行传输能力和信道容量。在5G NR系统中，为了保证数据传输的灵活性，网络设备会在PDCCH上为每个终端设备独立的分配DCI指示相应用户终端进行PDSCH和/或PUSCH的传输。导致多个终端设备总的DCI开销较大，减少了在相同时频资源上用于有效数据传输的资源。
具体的，在NR系统中，根据DCI用途的不同，DCI中可以包含8种不同类型(Format)的指示字段，不同的指示字段用于指示对应的PDSCH或PUSCH数据信道的传输。参考表1，为8种不同的Format以及各自对应的用途。
表1 DCI类型及用途
Figure PCTCN2020103317-appb-000001
本申请实施例中，以调度PUSCH传输的DCI Format 0_1为例进行说明，该DCI中的参数配置包括：
1、DCI Format指示：占用1bit，当该字段取值为0时，表明该DCI是对PUSCH数据传输的调度指示，取值为1时，表明该DCI是对PDSCH数据传输的调度指示。
2、子载波指示：占用0bit或者3bit。
3、部分带宽(bandwidth part，BWP)指示：占用0、1或2bit。若指示高层配置的上行BWP的个数为k BWP，则BWP指示所占用的bit数目为
Figure PCTCN2020103317-appb-000002
其中，符号
Figure PCTCN2020103317-appb-000003
表示向上取整。
当高层配置的BWP的个数(不包含初始BWP)不超过3个时，通过BWP标识(例如BWP-ID)进行指示，从配置的BWP集合中依据高层信令配置的BWP-ID选择对应的BWP，总的BWP个数等于k BWP+1。
当高层配置的BWP(不包含初始BWP)超过3个时，通过单独的DCI指令从预 定义表格中选取BWP指示的比特取值。
参考表2，为预定义表格的一种可能的表现形式，当高层配置的BWP个数为4时，通过DCI中的字段从高层信令配置的BWP集合中确定BWP，例如，DCI中BWP指示域的取值为00，则取值第一个BWP。
表2
Figure PCTCN2020103317-appb-000004
4、时域资源分配指示：
当通过DCI调度PUSCH进行传输块(transmit block，TB)发送时，可以根据DCI中字段time-domain-resource-assignment的取值m，m为大于等于0的整数，确定m+1为行索引，从预定义的表格中选取第m+1行对应的slot偏移值K2、slot起始位置S和连续持续的符号长度L、PUSCH的映射类型，从而确定时域资源的分配。也可以通过高层信令pusch-ConfigCommon/pusch-Config中的pusch-Allocationlist来确定时域资源的分配。
参考表3，当高层信令pusch-ConfigCommon中包含pusch-Allocationlist时，通过高层信令pusch-ConfigCommon或者pusch-Config中的字段pusch-Allocationlist来确定时域资源的分配。
表3
Figure PCTCN2020103317-appb-000005
Figure PCTCN2020103317-appb-000006
Figure PCTCN2020103317-appb-000007
参考表4和表5，当高层信令pusch-ConfigCommon中不包含pusch-Allocationlist时，采用默认(Default)A的PUSCH时域资源分配，分别为DefaultA正常循环前缀(cyclic prefix，CP)和扩展CP。表4为正常CP，表5为扩展CP。
正常CP截取的CP时间长度小于扩展CP。当覆盖范围较小时，对应的多径时延扩展较小，需要的CP也越小，因此可以采用正常CP。当覆盖范围较大时，对应的多径时延扩展较大，需要的CP也越大，可以采用扩展CP。例如，在子载波间隔为15KHz时，正常CP是144Ts，扩展CP是512Ts，其中，(30720Ts＝1ms)。
表4
Figure PCTCN2020103317-appb-000008
表5
Figure PCTCN2020103317-appb-000009
通过DCI通知行索引(row index)就可以确定PUSCH的映射类型和相关参数(如slot偏移值K2、slot起始位置S、连续持续符号长度L以及PUSCH的映射类型)的具体取值。例如，当覆盖范围较小时，若row index为1，则PUSCH的映射类型为Type A，slot偏移值K2为j，slot起始位置S为0，连续持续符号长度L为14。其中，j的取值和PUSCH的子载波间隔配置μ PUSCH有关，参考表6，当μ PUSCH为0时，j的取值为1，当μ PUSCH为1时，j的取值为1。
表6
μ PUSCH j
0 1
1 1
2 2
3 3
当通过DCI调度PUSCH发送CSI报告(report)而不发送TB时，时域资源分配的slot起始位置S和连续持续符号L仍旧可以通过DCI通知行索引的方式确定，但slot的偏移值K2依据高层参数CSI-ReportConfig中的reportSlotConfig来确定。
终端设备发送PUSCH的起始slot位置
Figure PCTCN2020103317-appb-000010
其中，μ PUSCH和μ PDCCH分别表示PUSCH和PDCCH的子载波间隔配置。
slot起始位置S、连续持续符号L和时域符号的时序时间(Start and length indicator value，SLIV)之间满足：当L-1≤7时，SLIV＝14(L-1)+S；除此之外，SLIV＝14(14-L+1)+(14-1-S)。
5、频域资源分配指示：
频域资源的分配类型包括离散频域资源type0和连续频域资源type1。离散频域资源是指可用的频域资源为不连续的，或不完全连续的，连续频域资源是指频域资源为连续的，中间没有间隔的不可用的频域资源。终端设备可以根据第一下行控制信息确定频域资源的分配类型，也可以根据高层信令确定频域资源的分配类型。
若pusch-Config中的资源配置(resource allocation)为dynamicswitch时，可以通过第一下行控制信息确定频域资源的分配类型。若pusch-Config中的resource allocation为除dynamicswitch以外的其他配置，则通过高层信令确定频域资源的分配类型。
需要说明的，当使能预编码转换(transform precoder enable)，即当采用单载波频分多址(Single-carrier Frequency-Division Multiple Access，SC-OFDM)波形进行数据传输时，网络设备为终端设备配置的频域资源的分配类型只能为type1。
当不使能预编码转换(transform precoder disabled)，即当采用循环前缀频分多址(cyclic prefix Frequency-Division Multiple Access，CP-OFDM)波形进行数据传输时，网络设备为终端设备配置的频域资源的分配类型可以为type0，也可以为type1。当DCI format为format0_0时，网络设备为终端设备配置的频域资源的分配类型为type1。
当频域资源的分配类型为type0时，通过DCI通知的比特位图(bitmap)指示终端设备应该调度的资源块组(resource block group，RBG)资源。
具体的，每个比特代表一个资源块组(resource block group，RBG)，每个RBG中包含的资源块(resource block，RB)的数目取决于部分带宽和配置类型(Configuration，简称Config)。BWP与配置类型都通过高层信令配置。
示例性的，参考表7，当BWP在1-36之间、Config字段为2时，每个RBG包含4个RB，即4个物理资源块(physical resource block，PRB)。当BWP在37-72之间、Config字段为2时，每个RBG包含8个物理资源块(physical resource block，PRB)。
表7
Figure PCTCN2020103317-appb-000011
Figure PCTCN2020103317-appb-000012
表7也可以用表8表示，具体如下：
表8
Figure PCTCN2020103317-appb-000013
比特位图中，相应位置的比特取值为1，表明该位置关联的频域资源可用，反之，相应位置的比特取值为0，则表明该位置关联的频域资源不可用。
当频域资源的分配类型为type1时，通过两个参数来配置频域的资源分配：即RB的起始位置和RB连续持续长度。因此，type1的频域资源分配只支持连续的PRB分配。
6、调制解调参考信号(demodulation refenrece signal，DMRS)天线端口指示：
网络设备根据下行DMRS的配置类型(DL_dmrs_config_type)以及下行前置DMRS时域长度(DL_dmrs_config_maxlength)确定天线端口，DL_dmrs_config_type包括第一配置类型type-1和第二配置类型type-2，DL_dmrs_config_maxlength可以包括1个时域符号(symbol)和2个symbol。目前NR系统可以支持12个天线端口的空分复用，但在上行传输中，单个终端设备最多可以支持4层数据的传输。
参考图4，为不同DL_dmrs_config_type和DL_dmrs_config_maxlength配置下，DMRS天线端口对应情况，其中，配置类型为type-1时，DMRS频域可以分成2个group，分别为码分复用(code dividing multiplexing，CDM)group 0和CDM group 1。配置类型为type-2时，DMRS频域可以分为3个group，分别为CDM group 0、CDM group 1和CDM group2。
当下行DMRS的配置类型为type-1以及下行前置DMRS时域长度为1个symbol时，最多支持4层数据的传输，对应4个不同天线端口port，其中，CDM group 0支持port 0，port1的频域OCC复用；CDM group1支持port 2，port3的频域OCC复用。
当下行DMRS的配置类型为type-1以及下行前置DMRS时域长度为2个symbol时，在上述type-1和1个symbol基础上，引入时域OCC增加1个symbol，因此可以支持8层数据的传输，对应8个不同天线端口port，其中，CDM group0支持port 0， port1(port4，port5)的频域OCC复用；CDM group1支持port 2，port3(port6，port7)的频域OCC复用。
当下行DMRS的配置类型为type-2以及下行前置DMRS时域长度为1个symbol时，最多支持6层数据的传输，对应6个不同天线端口port，其中，CDM group0支持port 0，port1的频域OCC复用；CDM group1支持port 2，port3的频域OCC复用；CDM group2支持port 4，port5的频域OCC复用。
当下行DMRS的配置类型为type-2以及下行前置DMRS时域长度为2个symbol时，最多支持12层数据的传输，对应12个不同天线端口port，其中，CDM group0支持port 0，port1(port6，port7)的频域OCC复用；CDM group1支持port 2，port3(port8，port9)的频域OCC复用；CDM group2支持port 4，port5(port10，port11)的频域OCC复用。
示例性的，当终端设备1和终端设备2传输数据使用的PRB相同时，终端设备1和终端设备2可以在一个CDM group内(占用相同子载波)，通过正交码实现干扰消除，例如，终端设备1(layer 2)采用port 0和port 1；终端设备2(layer1)采用port 4。
当终端设备1和终端设备2传输数据使用的PRB不同时，终端设备1和终端设备2不能在同一个CDMgroup内(必须占用不同子载波，通过FDM实现干扰消除)，此时，终端设备1(layer 2)可以采用port0，port 1，终端设备2(layer 1)可以采用port 2。
参考表9，每个终端设备采用的天线端口编号，需要通过DCI通知索引值，从预定义的表9中选取。示例性的，当dmrs_config_type＝1，dmrs_config_maxlength＝1，transform precoder不使能(enabled)时，DCI中通过2bit指示通知终端设备应该采用的天线端口。当比特取值为00时，对应value值为0，终端设备应该采用的天线端口为port 0；当比特取值为01时，对应value值为1，终端设备应该采用的天线端口为port 1；当比特取值为10时，对应value值为2，终端设备应该采用的天线端口为port 2；当比特取值为11时，对应value值为3，终端设备应该采用的天线端口为port 3。
表9
Figure PCTCN2020103317-appb-000014
7、调制编码方式(modulation and coding scheme，MCS)指示：
网络设备根据上行探测参考信号(sounding reference signal，SRS)确定上行信道衰落，并选择相应的调制阶数和目标码率。通过DCI将该上行传输的调度信息发送至终端设备。
当信道质量较好时，网络设备会选择较高的调制阶数和目标码率，来提高上行传输的数据速率；当信道质量较差时，网络设备会选择较低的调制阶数和目标码率，通过添加冗余比特来抵抗信道衰落，保证TB的正确传输。
参考表10，现有NR协议中通过预定义表格的形式，给出了32种不同的MCS组合，通过DCI中5bit的指示将相应的索引值发送至终端设备，终端设备根据该索引值就可以确定应该采用的调制阶数和目标码率。
示例性的，当调制编码方式的索引值为3时，采用的调制阶数为2，目标码率与1024的乘积为251。
表10
Figure PCTCN2020103317-appb-000015
Figure PCTCN2020103317-appb-000016
8、新传数据指示(new data indicator，NDI)指示：
每个终端设备通过1bit的NDI指示确定数据是新传还是重传。终端设备确定数据是否上行重传包括以下2种方式，分别为：
方式1：通过在物理混合重传指示信道(physical hybrid ARQ indicator channel，PHICH)中传输的确认(Acknowledge，ACK)响应或非确认(Negative Acknowledgement，NACK)响应的触发。网络设备收到PUSCH后进行译码，若译码正确，则通过PHICH发送ACK指示终端设备无需进行数据重传，若译码失败，则通过PHICH发送NACK指示终端设备需要进行数据重传。
方式2：通过PDCCH中传输的上行调度授权(UL grant)的触发指示终端设备可以发送数据。通过NDI是否发生反转确定数据是新传还是重传。NDI反转，是指NDI的值从0变成1，或者从1变成0。若NDI参数与上次的相比发生了反转，则表示新传，若NDI参数与上次的相同，则表示重传。PHICH通常用于指示非自适应重传，且优先级低于DCI中的NDI指示。通过PDCCH的DCI中NDI反转进行重传，可以自适应的解决用户的资源冲突。
9、冗余版本(redundancy version，RV)编号指示：
每个终端设备的RV编号需要2bit的指示，取值可能为{0,1,2,3}。当前数据信道传输用低密度奇偶检验码(low density parity check coding，LDPC)进行信道编码，可以增强抵抗信道衰落的能力。
LDPC编码后的比特序列，将依据MCS指示进行速率匹配，即从LDPC编码后的比特序列中从不同位置选取，满足相应的码率。从LDPC编码后比特序列中选取出来的部分比特，称为一个RV。
现有NR系统中，LDPC编码后比特序列有4个选择的起点，选择出来的RV分别可以定义为RV0、RV1、RV2、RV3，需要指示终端设备每次传输采用的RV编号，在HARQ重传中，会将多次接收到的RV进行合并译码。
10、混合自动重传请求(Hybrid Automatic Retransmission Quest，HARQ)进程指示：
每个终端设备的HARQ进程需要4bit的指示，由于终端设备在发送数据和接收数据之间的等待时间较长，为避免浪费等待时间内的时域资源，可以利用与该等待时间相对应的时域符号进行其他进程的数据发送。因此，当前NR系统最多可以支持16个进程的传输。
本申请实施例中，网络设备10可以是传输接收节点(transmission reception point，TRP)、基站、中继站或接入点等。网络设备10可以是5G通信系统中的网络设备或未来演进网络中的网络设备；还可以是可穿戴设备或车载设备等。另外还可以是：全球移动通信系统(global system for mobile communication，GSM)或码分多址(code  division multiple access，CDMA)网络中的基站收发信台(base transceiver station，BTS)，也可以是宽带码分多址(wideband code division multiple access，WCDMA)中的NB(NodeB)，还可以是长期演进(long term evolution，LTE)中的eNB或eNodeB(evolutional NodeB)。网络设备10还可以是云无线接入网络(cloud radio access network，CRAN)场景下的无线控制器。
本申请实施例中，终端设备20是一种具有无线通信功能的设备，可以部署在陆地上，包括室内或室外、手持或车载。也可以部署在水面上(如轮船等)。还可以部署在空中(例如飞机、气球和卫星上等)。终端设备又称之为用户设备(user equipment，UE)，移动台(mobile station，MS)、移动终端设备(mobile terminal，MT)以及终端设备等，是一种向用户提供语音和/或数据连通性的设备。例如，终端设备包括具有无线连接功能的手持式设备、车载设备等。目前，终端设备可以是：手机(mobile phone)、平板电脑、笔记本电脑、掌上电脑、移动互联网设备(mobile internet device，MID)、可穿戴设备(例如智能手表、智能手环、计步器等)，车载设备(例如，汽车、自行车、电动车、飞机、船舶、火车、高铁等)、虚拟现实(virtual reality，VR)设备、增强现实(augmented reality，AR)设备、工业控制(industrial control)中的无线终端设备、智能家居设备(例如，冰箱、电视、空调、电表等)、智能机器人、车间设备、无人驾驶(self driving)中的无线终端设备、远程手术(remote medical surgery)中的无线终端设备、智能电网(smart grid)中的无线终端设备、运输安全(transportation safety)中的无线终端设备、智慧城市(smart city)中的无线终端设备，或智慧家庭(smart home)中的无线终端设备、飞行设备(例如，智能机器人、热气球、无人机、飞机)等。本申请一种可能的应用的场景中终端设备为经常工作在地面的终端设备，例如车载设备。在本申请中，为了便于叙述，部署在上述设备中的芯片，例如片上系统(System-On-a-Chip，SOC)、基带芯片等，或者其他具备通信功能的芯片也可以称为终端设备。
终端设备可以是具有相应通信功能的车辆，或者车载通信装置，或者其它嵌入式通信装置，也可以是用户手持通信设备，包括手机，平板电脑等。
作为示例，在本申请实施例中，该终端设备还可以是可穿戴设备。可穿戴设备也可以称为穿戴式智能设备，是应用穿戴式技术对日常穿戴进行智能化设计、开发出可以穿戴的设备的总称，如眼镜、手套、手表、服饰及鞋等。可穿戴设备即直接穿在身上，或是整合到用户的衣服或配件的一种便携式设备。可穿戴设备不仅仅是一种硬件设备，更是通过软件支持以及数据交互、云端交互来实现强大的功能。广义穿戴式智能设备包括功能全、尺寸大、可不依赖智能手机实现完整或者部分的功能，例如：智能手表或智能眼镜等，以及只专注于某一类应用功能，需要和其它设备如智能手机配合使用，如各类进行体征监测的智能手环、智能首饰等。
网络设备为与终端设备配合使用的一种可以用于发射或接收信号的实体。例如，可以是WLAN中的接入点(Access Point，AP)，还可以是LTE中的eNB或eNodeB，或者中继站或接入点，或者车载设备、可穿戴设备以及未来5G网络中的网络设备或者未来演进的PLMN网络中的网络设备等。
另外，在本发明实施例中，网络设备为小区提供服务，终端设备通过该小区使用 的传输资源(例如，时域资源，或者，频域资源，或者，时频资源)与网络设备进行通信。该小区可以是网络设备(例如基站)对应的小区，小区可以属于宏基站，也可以属于小小区(small cell)对应的基站，这里的小小区可以包括：城市小区(metro cell)、微小区(micro cell)、微微小区(Pico cell)、毫微微小区(femto cell)等，这些小小区具有覆盖范围小和发射功率低的特点，适用于提供高速率的数据传输服务。
上述format0_1的DCI指示中，定义了多个字段指示每个终端设备PUSCH传输应该采用的时频资源、调制编码方式、天线端口等诸多参数。每个DCI中需要占用多个bit指示终端设备的数据传输。即使是在MU-MIMO系统中，每个终端设备的DCI也是独立配置的。
参考图5，图5示出了本申请实施例提供的一种数据传输方法的流程示意图，该方法包括：
S101、网络设备确定第一下行控制信息。
第一下行控制信息包括DMRS天线端口指示信息、频域资源指示信息、时域资源指示信息、混合自动重传请求(Hybrid Automatic Retransmission Quest，HARQ)进程指示、新传数据指示(New Data Indicator，NDI)指示、冗余版本(Redundancy Version，RV)指示中的任一个或多个。不同的指示信息在第一下行控制信息中分别占用了不同的比特。
当终端设备需要进行PDSCH接收和/或PUSCH调度时，网络设备执行S101。例如，网络设备基于小区内各个终端设备上报的CSI、多个终端设备的干扰计算、多小区的干扰计算、当前业务类型和特点等，确定配对的终端设备数目、并行传输数据的总层数以及第一下行控制信息。
S102、网络设备向n个终端设备发送第一下行控制信息。其中，第一下行控制信息用于指示n个终端设备传输数据，n为大于或等于2的整数。
示例性的，n个终端设备为配对的终端设备，该n个终端设备传输数据时占用的时域资源相同，因此可以共用一个下行控制信息。该第一下行控制信息为n个终端设备的公共信息，即n个终端设备可以共享的信息。
当n个终端设备传输数据的频域资源完全重叠时，网络设备向n个终端设备中每个终端设备发送相同的第一下行控制信息。
示例性的，网络设备可以向n个终端设备中每个终端设备发送PDCCH，该PDCCH中携带第一下行控制信息。
S103、终端设备接收来自网络设备的第一下行控制信息。
S104、终端设备根据第一下行控制信息与网络设备进行数据传输。
终端设备根据第一下行控制信息可以确定DMRS天线端口、频域资源、时域资源等信息，并根据这些信息与网络设备进行数据传输。其中，终端设备与网络设备之间的数据传输包括：终端设备接收来自网络设备的下行数据，和/或，终端设备向网络设备发送上行数据。
本申请实施例提供一种数据传输方法，网络设备通过向n个终端设备发送第一下行控制信息来指示n个终端设备的数据传输，相比现有技术为每个终端设备单独发送下行控制信息指示，可以节约发送下行控制信息的总的比特开销，提升系统性能。
在一种可能的实现方式中，当n个终端设备传输数据的频域资源完全重叠或不完全重叠时，第一下行控制信息包括DMRS天线端口指示信息。其中，该DMRS天线端口指示信息用于指示n个终端设备对应的第一序列值。该第一序列值用于确定n个终端设备对应的DMRS天线端口组合。
该第一序列值为包含n个终端设备与DMRS天线端口组合对应关系的指示信息，例如，可以为n个终端设备对应DMRS天线端口组合的索引值。
举例说明，终端设备可以根据第一序列值从第一对应关系表中确定n个终端设备对应的DMRS天线端口组合。
示例性的，该终端设备可以根据预定义的方式确定第一对应关系表，也可以从网络设备处获取第一对应关系表。
作为一种可能的实现方式，上述第一对应关系表的确定方式包括以下两种，分别为：
方式1：网络设备向n个终端设备发送第一信息，终端设备接收来自网络设备的第一信息，从而确定第一对应关系表。该第一信息包括第一对应关系表。
示例性的，网络设备可以向终端设备发送高层信令，该高层信令中携带第一信息。例如，高层信令可以为无线资源控制信令(radio resource control，RRC)。高层信令配置或更新的时间一般为几十至百毫秒级别，在低移动速率的多用户MIMO系统中，准静态信道在一定时间内保持不变，因此，可以采用高层信令配置第一对应关系表。
方式2：网络设备向n个终端设备发送第二信息，该第二信息可以通过RRC信令配置并发送至n个终端设备。该第二信息可以包括n的值以及n个终端设备并行传输数据的总层数，还可以包括dmrs_config_type、DL_dmrs_config_maxlength、transform precoder等多个参数的配置信息。不同数目的终端设备以及并行传输数据的总层数可以对应不同的第一对应关系表，该第二信息用于n个终端设备根据预定义的第一关系表集合确定第一对应关系表，第一关系表集合包括至少一个第一对应关系表，该第一对应关系表包括至少一个第一序列值和至少一个第二序列值与DMRS天线端口的对应关系。
第一关系表集合包括多个第一对应关系表，由于不同数目的终端设备以及并行传输数据的总层数对应不同的第一对应关系表。因此，终端设备可以根据第二信息从预定义的第一关系表集合中确定第一对应关系表。
需要说明的，网络设备以及终端设备都存储有该预定义的第一关系表集合。
示例性的，当第一序列值为n个终端设备对应DMRS天线端口组合的索引值。参考表11，当n的值为3，3个终端设备并行传输数据的总层数为8时，表11为第一对应关系表的一种可能的表现形式。其中，第一序列值为0-11的天线端口对应关系表示3个终端设备并行传输数据的层数分别为2、2、4，第一序列值为12-15的天线端口对应关系表示3个终端设备并行传输数据的层数分别为1、3、4。
通过第一对应关系表以及第一序列值可以确定n个终端设备对应的DMRS天线端口组合，例如，第一序列值为0，则3个终端设备分别对应天线端口组合：(port0，port 1)、(port 4，port 5)和(port 2，port 3，port 6，port 7)。
表11
Figure PCTCN2020103317-appb-000017
由于第一对应关系表包括至少一个第一序列值和至少一个第二序列值与DMRS天线端口的对应关系。因此，作为一种可能的实施例，如图5所示，本申请实施例提供的方法在S104之前还包括：
S105a、网络设备向n个终端设备发送第一指示信息。
示例性的，本申请实施例中网络设备可以通过第二下行控制信息分别向n个终端设备中的每个终端设备发送第一指示信息。该第一指示信息携带在第二下行控制信息中，该第二下行控制信息是针对每个终端设备发送的，用于携带第一指示信息。或者网络设备也可以通过高层信令分别向n个终端设备中的每个终端设备发送第一指示信息。该第一指示信息用于指示n个终端设备中每个终端设备对应的该第二序列值。第二序列值可以为表示n个终端设备配对顺序的索引值。
S105b、终端设备接收来自网络设备的第一指示信息。
继续参考表11，在上述示例的基础上，终端设备通过结合第一序列值和第二序列值可以确定3个终端设备中每个终端设备对应的天线端口。
示例性的，当第二序列值为索引值时，若第二序列值为3，则终端设备对应的天线端口为天线端口2、天线端口3、天线端口6和天线端口7。因此，通过第二序列值可以确定3个终端设备中每个终端设备对应的天线端口。
在一种可能的实现方式中，n个终端设备传输数据的频域资源不完全重叠时，作 为一种可能的实施例，如图5所示，本申请实施例提供的方法在S101之前，该方法还包括：
S106、网络设备根据n个终端设备确定m个目标组。
n个终端设备包括m个目标组，m为大于或等于2的整数，该m个目标组中同一个目标组内的用于终端设备传输数据的频域资源相同，m个目标组中不同目标组内的用于终端设备传输数据的频域资源不完全相同，即不同目标组内的用于终端设备传输数据的频域资源可以完全不同，也可以存在部分相同。
在一种可能的实现方式中，本申请实施例中的S102还可以通过以下方式实现：第一下行控制信息可以包括m个第三下行控制信息，网络设备向m个目标组中的每个目标组发送各自对应的第三下行控制信息，其中，任一个目标组对应的第三下行控制信息用于指示任一个目标组内的终端设备传输数据。
示例性的，第三下行控制信息1用于指示目标组1内的终端设备传输数据，第三下行控制信息2用于指示目标组2内的终端设备传输数据，第三下行控制信息1与第三下行控制信息2不同。
m个目标组中的终端设备可以根据各自对应的第三下行控制信息中的第一序列值从上述方式1或方式2获取到的第一对应关系表中确定对应目标组所对应的DMRS天线端口组合。
示例性的，目标组1对应第三下行控制信息1，第三下行控制信息1中包含第一序列值，目标组1内的终端设备根据该第一序列值可以从第一对应关系表中确定目标组1内的所有终端设备采用的DMRS天线端口组合。
本申请实施例中的S105还可以通过以下方式实现：网络设备通过高层信令或第二下行控制信息分别向m个目标组中每个目标组的每个终端设备发送第一指示信息。该第一指示信息用于指示m个目标组中每个目标组中的每个终端设备对应的第二序列值。每个终端设备根据第一序列值以及第二序列值即可确定各自对应的DMRS天线端口。每个终端设备确定DMRS天线端口的方法可参考S105，此处不再赘述。
作为一种可能的实施例，如图5所示，本申请实施例提供的方法在S106之后还包括：
S107a、网络设备向第一目标组的终端设备发送第一目标组的组标识。
示例性的，本申请实施例中的第一目标组的组标识可以携带在第一下行控制信息中。或者网络设备可以通过高层信令向第一目标组的终端设备发送第一目标组的组标识。
在一种可能的实现方式中，参考表12，第一对应关系表还包括：至少一个组标识与DMRS天线端口的对应关系。
表12
Figure PCTCN2020103317-appb-000018
组标识用于使属于该第一目标组中的终端设备确定属于第一目标组，第一目标组为m个目标组中的任一个。
S107b、终端设备接收来自网络设备的第一目标组的组标识。
示例性的，终端设备1可以根据该组标识确定第一目标组包括终端设备1和终端设备2，再通过第二序列值确定表示终端设备1配对顺序的索引值，就可以确定终端设备1对应的DMRS天线端口。
在一种可能的实施例中，本申请实施例中涉及到的第一下行控制信息还可以包括第二指示信息，该第二指示信息用于指示n个终端设备进行数据传输时使用的频域资源。
当n个终端设备的频域资源完全重叠时，即n个终端设备传输数据使用的频域资源相同，网络设备向n个终端设备发送第二指示信息，n个终端设备可以根据该第二指示信息确定频域资源。
当n个终端设备的频域资源不完全重叠时，即n个终端设备传输数据使用的频域资源不相同(没有重叠)或者不完全相同(可以有部分重叠)。例如，n个终端设备中可以有至少两个终端设备传输数据使用的频域资源完全相同，而其他终端设备传输数据使用的频域资源不完全相同，也可以是n个终端设备中每个终端设备传输数据使用的频域资源都不完全相同。网络设备根据n个终端设备确定m个目标组，具体实现可参考S106，此处不再赘述。网络设备分别向该m个目标组中的每个目标组发送第二指示信息，每个目标组根据对应的第二指示信息确定相应目标组的频域资源。
示例性的，网络设备向目标组1发送第二指示信息1，向目标组2发送第二指示信息2，该第二指示信息1承载于第一下行控制信息1中，第二指示信息2承载于第一下行控制信息2中。目标组1根据该第二指示信息1可以确定目标组1的频域资源，目标组2根据该第二指示信息2可以确定目标组2的频域资源。
由于频域资源的分配类型不同，第二指示信息的具体含义也存在差异，因此下述将分别介绍：
示例1、当频域资源的分配类型为type 0时，根据部分带宽和配置类型确定RBG的数目，再通过第二指示信息确定可用的RBG。第二指示信息包括至少一个第一比特和至少一个第二比特。其中，第一比特用于指示与该第一比特关联的频域资源可用，第二比特用于指示与该第二比特关联的频域资源不可用。n个终端设备基于该第二指示信息，确定配置的RBG资源。
示例性的，第二比特可以为“0”，第一比特可以为“1”。
示例性的，网络设备确定RBG数目为8，在DCI中通过8bit长度的比特位图指示终端设备应该采用的频域资源。该比特位图可以为10001101，表示第1、5、6、8个RBG(相应位置的比特取值为1)所在位置关联的频域资源可用，其余4个RBG(相应位置的比特取值为0)则不可用。n个终端设备基于比特位图的指示，即可确定配置的RBG资源。
示例2、当频域资源的分配类型为type1时，第二指示信息包括资源指示取值，该资源指示取值用于确定n个终端设备的频域资源起点和频域资源持续的连续资源块长度，各个终端设备的频域资源起点可以是相同的，也可以是不完全相同的。频域资源起点不完全相同可以是部分终端设备的频域资源起点相同，另一部分终端设备的频域资源起点不同。对应的，n个终端设备的频域资源持续的连续资源块长度也可以是相同的或不完全相同的，此处不再赘述。
该第二指示信息可以是第一下行控制信息中的资源指示取值(resource indication value，RIV)字段。该资源指示取值的比特数目为
Figure PCTCN2020103317-appb-000019
其中，n 1表示 当前部分带宽的带宽长度，是网络设备预配置的已知值。终端设备可以依据比特数目确定RIV，例如，当4bit的取值为1111时，RIV的取值为16；当4bit的取值为0000时，RIV的取值为1。终端设备根据RIV可以确定对应的频域资源起点RB start以及频域资源持续的连续资源块长度L RB。
具体的，终端设备可以通过
Figure PCTCN2020103317-appb-000020
确定RB start和L RB，其中
Figure PCTCN2020103317-appb-000021
的余数为RB start，商为L RB-1。示例性的，当RIV为16，n 1为4，则RB start为0，L RB为5。
确定RB start和L RB之后，终端设备还需要对RB start和L RB进行验证：
若资源块的长度L RB与n 1满足
Figure PCTCN2020103317-appb-000022
则RIV＝n 1*(L RB-1)+RB start；
若L RB与n 1满足
Figure PCTCN2020103317-appb-000023
且(n 1-RB start)≥L RB≥1，则RIV＝n 1*(n 1-L RB+1)+(n 1-1-RB start)。
当配对的终端设备的数目为3个时，现有技术每个终端设备都需要10bit的位图指示应该调度的RBG位置，3个配对的用户一共需要30bit。本申请实施例中第一DCI统一指示3个配对的终端设备应该调度的RBG位置，只需要10bit。因此，本申请实施例相比现有技术可以节省67％的DCI频域资源指示开销。
在一种可能的实施例中，本申请实施例中涉及到的第一下行控制信息还包括第三指示信息，第三指示信息用于指示n个终端设备进行数据传输时使用的时域资源。
由于配对的n个终端设备在时域资源的占用上是完全重叠的，因此网络设备与终端设备进行数据传输时，网络设备向n个终端设备发送一个公共的DCI指示时域配置即可。
示例性的，当配对的终端设备数目为3时，m的取值需要4bit指示(16种可能的取值)，若分别指示，则3个终端设备的时域资源指示DCI开销需要12bit，而通过本申请实施例的第一DCI统一指示3个配对的终端设备，只需要4bit指示，相比之下可以节省67％的DCI时域资源指示开销。
在一种可能的实施例中，本申请实施例中涉及到的第一下行控制信息还包括第四指示信息，该第四指示信息用于指示n个终端设备进行数据传输时使用的HARQ进程指示。
由于当前NR系统最多可以支持16个进程的传输，因此，配对的终端设备越多，总的进程越多，可以根据配对的终端设备的数目，即n的值，确定每个终端设备最多支持的进程数。该n的值包含在第四指示信息中。
示例性的，参考表13，配对的用户数目越多，DCI开销越小。当配对的终端设备的数目为3个时，单个终端设备最多支持8进程，每个终端设备需要3bit进行指示，因此第一下行控制信息中总的HARQ进程指示开销为9bit。相比现有技术中每个终端设备需要4bit进行指示，3个终端设备需要12bit，因此，本申请实施例可以节省25％的DCI HARQ进程指示开销。
表13
Figure PCTCN2020103317-appb-000024
在一种可能的实施例中，本申请实施例中涉及到的第一下行控制信息还包括第五指示信息，第五指示信息用于指示n个终端设备进行数据传输时使用的NDI指示。
单个终端设备需要1bit来指示NDI是否反转，在多用户配对中，可以根据配对的UE数目n，在第一下行控制信息中定义K bit的比特位图统一指示n个用户的NDI取值。
在一种可能的实施例中，本申请实施例中涉及到的第一下行控制信息还包括第六指示信息，第六指示信息用于指示n个终端设备进行数据传输时使用的RV指示。
单个终端设备的RV编号需要2bit指示，在多用户配对中，可以依据配对的终端设备数目n，在第一下行控制信息中定义n*2bit的序列来指示n个终端设备各自的RV编号。
需要说明的，第一下行控制信息中的其它字段，如DCI format指示、子载波指示、部分带宽指示等，都可以应用DCI指示单个终端设备的方法，通过第一下行控制信息统一指示配对的n个终端设备，而无需为每个终端设备单独配置。因此，配对的用户终端设备数目越多，节省的总的DCI开销就越大。
上述主要从各个设备之间交互的角度对本申请实施例的方案进行了介绍。可以理解的是，各个设备，例如网络设备、终端设备等为了实现上述功能，其包括了执行各个功能相应的硬件结构和/或软件模块。本领域技术人员应该很容易意识到，结合本文中所公开的实施例描述的各示例的单元及算法步骤，本申请能够以硬件或硬件和计算机软件的结合形式来实现。某个功能究竟以硬件还是计算机软件驱动硬件的方式来执行，取决于技术方案的特定应用和设计约束条件。专业技术人员可以对每个特定的应用来使用不同方法来实现所描述的功能，但是这种实现不应认为超出本申请的范围。
本申请实施例可以根据上述方法示例对网络设备、终端设备进行功能单元的划分，例如，可以对应各个功能划分各个功能单元，也可以将两个或两个以上的功能集成在一个处理单元中。上述集成的单元既可以采用硬件的形式实现，也可以采用软件功能单元的形式实现。需要说明的是，本申请实施例中对单元的划分是示意性的，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式。
上面结合图1至图5，对本申请实施例的方法进行了说明，下面对本申请实施例提供的执行上述方法的数据传输装置进行描述。本领域技术人员可以理解，方法和装置可以相互结合和引用，本申请实施例提供的一种数据传输装置可以执行上述数据传输方法中由网络设备、终端设备执行的步骤。
下面以采用对应各个功能划分各个功能模块为例进行说明：
在采用集成的单元的情况下，图6示出了上述实施例中所涉及的一种数据传输装置，该数据传输装置可以包括：处理单元101，以及通信单元102。
一种示例，该数据传输装置为网络设备，或者为应用于网络设备中的芯片。在这种情况下，通信单元102，用于支持该数据传输装置执行上述实施例中由网络设备执行的S102。处理单元101，用于支持数据传输装置执行上述实施例中由网络设备执行的S101。
在一种可能的实施例中，通信单元102，还用于支持数据传输装置执行上述实施例中由网络设备执行的S105a、S107a。还用于支持数据传输装置执行上述实施例中由网络设备执行的S106。
另一种示例，该数据传输装置为终端设备，或者为应用于终端设备中的芯片。在这种情况下，处理单元101，用于支持该数据传输装置执行上述实施例中由终端设备执行的S104。通信单元102，用于支持该数据传输装置执行上述实施例中由终端设备执行的S103。
在一种可能的实施例中，通信单元102，还用于支持数据传输装置执行上述实施例中由终端设备执行的S105b、S107b。
该数据传输装置还可以包括存储单元。该存储单元，用于存储计算机程序代码，计算机程序代码包括指令。如果数据传输装置应用于网络设备时，该存储单元可以是该芯片内的存储单元(例如，寄存器、缓存等)，也可以是该网络设备内的位于该芯片外部的存储单元(例如，只读存储器、随机存取存储器等)。
在采用集成的单元的情况下，图7示出了上述实施例中所涉及的数据传输装置的一种可能的逻辑结构示意图。该数据传输装置包括：处理模块112和通信模块113。处理模块112用于对数据传输装置的动作进行控制管理，例如，处理模块112用于执行在数据传输装置中进行信息/数据处理的步骤。通信模块113用于支持数据传输装置中进行信息/数据发送或者接收的步骤。
在一种可能的实施例中，数据传输装置还可以包括存储模块111，用于存储数据传输装置可的程序代码和数据。
示例性的，数据传输装置为网络设备，或者为应用于网络设备中的芯片。在这种情况下，通信模块113，用于支持数据传输装置执行上述实施例中由网络设备执行的S102。处理模块112，用于支持数据传输装置执行上述实施例中的S101。
在一种可能的实施例中，通信模块113，还用于支持数据传输装置执行上述实施例中由网络设备执行的S105a、S107a。处理模块112，还用于支持数据传输装置执行上述实施例中由网络设备执行的S106。
示例性的，当数据传输装置为终端设备，或者为应用于终端设备中的芯片。在这种情况下，通信模块113，用于支持该数据传输装置执行上述实施例中由网络设备执行的S103。处理模块112，用于支持数据传输装置执行上述实施例中由网络设备执行的S104。
在一种可能的实施例中，通信模块113，还用于支持数据传输装置执行上述实施例中由终端设备执行的S105b、S107b。
其中，处理模块112可以是处理器或控制器，例如可以是中央处理器单元，通用处理器，数字信号处理器，专用集成电路，现场可编程门阵列或者其他可编程逻辑器件、晶体管逻辑器件、硬件部件或者其任意组合。其可以实现或执行结合本发明公开内容所描述的各种示例性的逻辑方框，模块和电路。处理器也可以是实现计算功能的组合，例如包含一个或多个微处理器组合，数字信号处理器和微处理器的组合等等。通信模块113可以是收发器、收发电路或通信接口等。存储模块111可以是存储器。
当处理模块112为处理器41或处理器45，通信模块113为通信接口43或收发器时，存储模块111为存储器42时，本申请所涉及的数据传输装置可以为图8所示的通信设备。该通信设备包括处理器41，通信线路44以及至少一个通信接口(图8中仅是示例性的以包括通信接口43为例进行说明)。
可选的，该通信设备还可以包括存储器42。
处理器41可以是一个通用中央处理器(central processing unit，CPU)，微处理器，特定应用集成电路(application-specific integrated circuit，ASIC)，或一个或多个用于控制本申请方案程序执行的集成电路。
通信线路44可包括一通路，在上述组件之间传送信息。
通信接口43，使用任何收发器一类的装置，用于与其他设备或通信网络通信，如以太网，无线接入网(radio access network，RAN)，无线局域网(wireless local area networks，WLAN)等。
存储器42可以是只读存储器(read-only memory，ROM)或可存储静态信息和指令的其他类型的静态存储设备，随机存取存储器(random access memory，RAM)或者可存储信息和指令的其他类型的动态存储设备，也可以是电可擦可编程只读存储器(electrically erasable programmable read-only memory，EEPROM)、只读光盘(compact disc read-only memory，CD-ROM)或其他光盘存储、光碟存储(包括压缩光碟、激光碟、光碟、数字通用光碟、蓝光光碟等)、磁盘存储介质或者其他磁存储设备、或者能够用于携带或存储具有指令或数据结构形式的期望的程序代码并能够由计算机存取的任何其他介质，但不限于此。存储器可以是独立存在，通过通信线路44与处理器相连接。存储器也可以和处理器集成在一起。
其中，存储器42用于存储执行本申请方案的计算机执行指令，并由处理器41来控制执行。处理器41用于执行存储器42中存储的计算机执行指令，从而实现本申请下述实施例提供的数据传输方法。
可选的，本申请实施例中的计算机执行指令也可以称之为应用程序代码，本申请实施例对此不作具体限定。
在具体实现中，作为一种实施例，处理器41可以包括一个或多个CPU，例如图8中的CPU0和CPU1。
在具体实现中，作为一种实施例，通信设备可以包括多个处理器，例如图8中的处理器41和处理器45。这些处理器中的每一个可以是一个单核(single-CPU)处理器，也可以是一个多核(multi-CPU)处理器。这里的处理器可以指一个或多个设备、电路、和/或用于处理数据(例如计算机程序指令)的处理核。
图9是本申请实施例提供的芯片150的结构示意图。芯片150包括一个或两个以 上(包括两个)处理器1510和通信接口1530。
可选的，该芯片150还包括存储器1540，存储器1540可以包括只读存储器和随机存取存储器，并向处理器1510提供操作指令和数据。存储器1540的一部分还可以包括非易失性随机存取存储器(non-volatile random access memory，NVRAM)。
在一些实施方式中，存储器1540存储了如下的元素，执行模块或者数据结构，或者他们的子集，或者他们的扩展集。
在本申请实施例中，通过调用存储器1540存储的操作指令(该操作指令可存储在操作系统中)，执行相应的操作。
处理器1510控制网络设备、终端设备中任一个的处理操作，处理器1510还可以称为中央处理单元(central processing unit，CPU)。
存储器1540可以包括只读存储器和随机存取存储器，并向处理器1510提供指令和数据。存储器1540的一部分还可以包括非易失性随机存取存储器(non-volatile random access memory，NVRAM)。例如应用中存储器1540、通信接口1530以及存储器1540通过总线系统1520耦合在一起，其中总线系统1520除包括数据总线之外，还可以包括电源总线、控制总线和状态信号总线等。但是为了清楚说明起见，在图9中将各种总线都标为总线系统1520。
上述本申请实施例揭示的方法可以应用于处理器1510中，或者由处理器1510实现。处理器1510可能是一种集成电路芯片，具有信号的处理能力。在实现过程中，上述方法的各步骤可以通过处理器1510中的硬件的集成逻辑电路或者软件形式的指令完成。上述的处理器1510可以是通用处理器、数字信号处理器(digital signal processing，DSP)、专用集成电路(application specific integrated circuit，ASIC)、现成可编程门阵列(field-programmable gate array，FPGA)或者其他可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件。可以实现或者执行本申请实施例中的公开的各方法、步骤及逻辑框图。通用处理器可以是微处理器或者该处理器也可以是任何常规的处理器等。结合本申请实施例所公开的方法的步骤可以直接体现为硬件译码处理器执行完成，或者用译码处理器中的硬件及软件模块组合执行完成。软件模块可以位于随机存储器，闪存、只读存储器，可编程只读存储器或者电可擦写可编程存储器、寄存器等本领域成熟的存储介质中。该存储介质位于存储器1540，处理器1510读取存储器1540中的信息，结合其硬件完成上述方法的步骤。
一种可能的实现方式中，通信接口1530用于执行上述任一实施例中的网络设备或终端设备的接收和发送的步骤。处理器1510用于执行上述任一实施例中的网络设备或终端设备的处理的步骤。
以上通信单元可以是一种该装置的接口电路或通信接口，用于从其它装置接收信号。例如，当该装置以芯片的方式实现时，该通信单元是该芯片用于从其它芯片或装置接收信号或发送信号的接口电路或通信接口。
在上述实施例中，存储器存储的供处理器执行的指令可以以计算机程序产品的形式实现。计算机程序产品可以是事先写入在存储器中，也可以是以软件形式下载并安装在存储器中。
计算机程序产品包括一个或多个计算机指令。在计算机上加载和执行计算机程序 指令时，全部或部分地产生按照本申请实施例的流程或功能。计算机可以是通用计算机、专用计算机、计算机网络、或者其他可编程装置。计算机指令可以存储在计算机可读存储介质中，或者从一个计算机可读存储介质向另一计算机可读存储介质传输，例如，计算机指令可以从一个网站站点、计算机、服务器或数据中心通过有线(例如同轴电缆、光纤、数字用户线(DSL))或无线(例如红外、无线、微波等)方式向另一个网站站点、计算机、服务器或数据中心进行传输。计算机可读存储介质可以是计算机能够存储的任何可用介质或者是包括一个或多个可用介质集成的服务器、数据中心等数据存储设备。可用介质可以是磁性介质，(例如，软盘、硬盘、磁带)、光介质(例如，DVD)、或者半导体介质(例如固态硬盘solid state disk，SSD)等。
一方面，提供一种计算机可读存储介质，计算机可读存储介质中存储有指令，当指令被运行时，使得网络设备或者应用于网络设备中的芯片执行实施例中的S101、S102。
另一方面，提供一种计算机可读存储介质，计算机可读存储介质中存储有指令，当指令被运行时，使得网络设备或者应用于网络设备中的芯片执行实施例中的S105a、S106、S107a。
又一方面，提供一种计算机可读存储介质，计算机可读存储介质中存储有指令，当指令被运行时，使得终端设备或者应用于终端设备中的芯片执行实施例中的S103、S104。
另一方面，提供一种计算机可读存储介质，计算机可读存储介质中存储有指令，当指令被运行时，使得终端设备或者应用于终端设备中的芯片执行实施例中的S105b、S107b。
前述的可读存储介质可以包括：U盘、移动硬盘、只读存储器、随机存取存储器、磁碟或者光盘等各种可以存储程序代码的介质。
一方面，提供一种包括指令的计算机程序产品，计算机程序产品中存储有指令，当指令被运行时，使得网络设备或者应用于网络设备中的芯片执行实施例中的S101、S102。
另一方面，提供一种包括指令的计算机程序产品，计算机程序产品中存储有指令，当指令被运行时，使得网络设备或者应用于网络设备中的芯片执行实施例中的S105a、S106、S107a。
又一方面，提供一种包括指令的计算机程序产品，计算机程序产品中存储有指令，当指令被运行时，使得终端设备或者应用于终端设备中的芯片执行实施例中的S103、S104。
再一方面，提供一种包括指令的计算机程序产品，计算机程序产品中存储有指令，当指令被运行时，使得终端设备或者应用于终端设备中的芯片执行实施例中的S105b、S107b。
一方面，提供一种芯片，该芯片应用于网络设备中，芯片包括至少一个处理器和通信接口，通信接口和至少一个处理器耦合，处理器用于运行指令，以执行实施例中的S101、S102。
又一方面，提供一种芯片，该芯片应用于网络设备中，芯片包括至少一个处理器 和通信接口，通信接口和至少一个处理器耦合，处理器用于运行指令，以执行实施例中S105a、S106、S107a。
一方面，提供一种芯片，该芯片应用于终端设备中，芯片包括至少一个处理器和通信接口，通信接口和至少一个处理器耦合，处理器用于运行指令，以执行实施例中的使得终端设备或者应用于终端设备中的芯片执行实施例中的S103、S104。
又一方面，提供一种芯片，该芯片应用于终端设备中，芯片包括至少一个处理器和通信接口，通信接口和至少一个处理器耦合，处理器用于运行指令，以执行实施例中S105b、S107b。
在上述实施例中，可以全部或部分地通过软件、硬件、固件或者其任意组合来实现。当使用软件程序实现时，可以全部或部分地以计算机程序产品的形式来实现。该计算机程序产品包括一个或多个计算机指令。在计算机上加载和执行计算机程序指令时，全部或部分地产生按照本申请实施例的流程或功能。计算机可以是通用计算机、专用计算机、计算机网络、或者其他可编程装置。计算机指令可以存储在计算机可读存储介质中，或者从一个计算机可读存储介质向另一个计算机可读存储介质传输，例如，计算机指令可以从一个网站站点、计算机、服务器或者数据中心通过有线(例如同轴电缆、光纤、数字用户线(digital subscriber line，简称DSL))或无线(例如红外、无线、微波等)方式向另一个网站站点、计算机、服务器或数据中心进行传输。计算机可读存储介质可以是计算机能够存取的任何可用介质或者是包括一个或多个可以用介质集成的服务器、数据中心等数据存储设备。可用介质可以是磁性介质(例如，软盘、硬盘、磁带)，光介质(例如，DVD)、或者半导体介质(例如固态硬盘(solid state disk，简称SSD))等。
尽管在此结合各实施例对本申请进行了描述，然而，在实施所要求保护的本申请过程中，本领域技术人员通过查看附图、公开内容、以及所附权利要求书，可理解并实现公开实施例的其他变化。在权利要求中，“包括”(comprising)一词不排除其他组成部分或步骤，“一”或“一个”不排除多个的情况。单个处理器或其他单元可以实现权利要求中列举的若干项功能。相互不同的从属权利要求中记载了某些措施，但这并不表示这些措施不能组合起来产生良好的效果。
尽管结合具体特征及其实施例对本申请进行了描述，显而易见的，在不脱离本申请的精神和范围的情况下，可对其进行各种修改和组合。相应地，本说明书和附图仅仅是所附权利要求所界定的本申请的示例性说明，且视为已覆盖本申请范围内的任意和所有修改、变化、组合或等同物。显然，本领域的技术人员可以对本申请进行各种改动和变型而不脱离本申请的精神和范围。这样，倘若本申请的这些修改和变型属于本申请权利要求及其等同技术的范围之内，则本申请也意图包括这些改动和变型在内。

Claims (44)

  1. 一种数据传输方法，其特征在于，包括：
    网络设备确定第一下行控制信息；
    所述网络设备向n个终端设备发送第一下行控制信息；其中，所述第一下行控制信息用于指示所述n个终端设备传输数据，n为大于或等于2的整数。
  2. 根据权利要求1所述的方法，其特征在于，
    所述第一下行控制信息包括调制解调参考信号DMRS天线端口指示信息，所述DMRS天线端口指示信息用于指示所述n个终端设备对应的第一序列值。
  3. 根据权利要求1-2任一项所述的方法，其特征在于，所述方法还包括：
    所述网络设备向所述n个终端设备发送第一信息，所述第一信息包括第一对应关系表，所述第一对应关系表包括至少一个第一序列值和至少一个第二序列值与DMRS天线端口的对应关系。
  4. 根据权利要求1-2任一项所述的方法，其特征在于，所述方法还包括：
    所述网络设备向所述n个终端设备发送第二信息，所述第二信息包括n的值以及所述n个终端设备并行传输数据的总层数，所述第二信息用于所述n个终端设备根据预定义的第一关系表集合确定第一对应关系表，所述第一关系表集合包括至少一个所述第一对应关系表，所述第一对应关系表包括至少一个第一序列值和至少一个第二序列值与DMRS天线端口的对应关系。
  5. 根据权利要求3-4任一项所述的方法，其特征在于，所述方法还包括：
    所述网络设备向所述n个终端设备发送第一指示信息，所述第一指示信息用于指示所述n个终端设备中每个终端设备对应的所述第二序列值。
  6. 根据权利要求5所述的方法，其特征在于，
    所述n个终端设备的频域资源不完全重叠时，所述n个终端设备包括m个目标组，所述m个目标组中同一个目标组内的用于终端设备传输数据的频域资源相同，所述m个目标组中不同目标组内的用于终端设备传输数据的频域资源不完全相同，m为大于或等于2的整数。
  7. 根据权利要求6所述的方法，其特征在于，
    所述第一对应关系表还包括：至少一个组标识与DMRS天线端口的对应关系，所述至少一个组标识与至少一个目标组对应。
  8. 根据权利要求7所述的方法，其特征在于，所述方法还包括：
    所述网络设备向第一目标组的终端设备发送所述第一目标组的组标识，所述组标识用于使属于所述第一目标组中的终端设备确定属于所述第一目标组，所述第一目标组为所述m个目标组中的任一个。
  9. 根据权利要求1-8任一项所述的方法，其特征在于，所述第一下行控制信息包括第二指示信息，所述第二指示信息用于指示所述n个终端设备进行数据传输时使用的频域资源。
  10. 根据权利要求9所述的方法，其特征在于，
    所述频域资源的分配类型为离散频域资源时，所述第二指示信息包括至少一个第一比特和至少一个第二比特，其中，所述第一比特用于指示与所述第一比特关联的频 域资源可用，所述第二比特用于指示与所述第二比特关联的频域资源不可用；
    所述频域资源的分配类型为连续频域资源，所述第二指示信息包括资源指示取值，所述资源指示取值用于确定所述n个终端设备的频域资源起点和频域资源持续的连续资源块长度。
  11. 一种数据传输方法，其特征在于，包括：
    终端设备接收来自网络设备的第一下行控制信息，所述第一下行控制信息用于指示n个终端设备传输数据，n为大于等于2的整数，所述终端设备为所述n个终端设备中的任一个；
    所述终端设备根据所述第一下行控制信息与所述网络设备进行数据传输。
  12. 根据权利要求11所述的方法，其特征在于，
    所述第一下行控制信息包括调制解调参考信号DMRS天线端口指示信息，所述DMRS天线端口指示信息用于指示所述n个终端设备对应的第一序列值。
  13. 根据权利要求11-12任一项所述的方法，其特征在于，所述方法还包括：
    所述终端设备接收来自网络设备的第一信息，所述第一信息包括第一对应关系表，所述第一对应关系表包括至少一个第一序列值和至少一个第二序列值与DMRS天线端口的对应关系。
  14. 根据权利要求11-12任一项所述的方法，其特征在于，所述方法还包括：
    所述终端设备接收来自网络设备的第二信息，所述第二信息包括n的值以及所述n个终端设备并行传输数据的总层数；
    所述终端设备根据所述第二信息，从预定义的第一关系表集合中确定第一对应关系表。
  15. 根据权利要求13-14任一项所述的方法，其特征在于，所述方法还包括：
    所述终端设备接收来自所述网络设备的第一指示信息，所述第一指示信息用于指示所述n个终端设备中每个终端设备对应的第二序列值；
    所述终端设备根据第一序列值以及所述第二序列值，从所述第一对应关系表中确定所述终端设备对应的DMRS天线端口。
  16. 根据权利要求15所述的方法，其特征在于，
    所述n个终端设备的频域资源不完全重叠时，所述n个终端设备包括m个目标组，所述m个目标组中同一个目标组内的用于终端设备传输数据的频域资源相同，所述m个目标组中不同目标组内的用于终端设备传输数据的频域资源不完全相同，m为大于或等于2的整数。
  17. 根据权利要求16所述的方法，其特征在于，
    所述第一对应关系表还包括：至少一个组标识与DMRS天线端口的对应关系。
  18. 根据权利要求17所述的方法，其特征在于，所述方法还包括：
    所述终端设备接收来自所述网络设备的第一目标组的组标识，所述组标识用于使属于所述第一目标组中的终端设备确定属于所述第一目标组，所述第一目标组为所述m个目标组中的任一个；
    所述终端设备根据所述组标识确定所述终端设备属于所述第一目标组。
  19. 根据权利要求11-18任一项所述的方法，其特征在于，所述第一下行控制信 息包括第二指示信息，所述第二指示信息用于指示所述n个终端设备进行数据传输时使用的频域资源。
  20. 根据权利要求19所述的方法，其特征在于，
    所述频域资源的分配类型为离散频域资源，所述第二指示信息包括至少一个第一比特和至少一个第二比特，其中，所述第一比特用于指示与所述第一比特关联的频域资源可用，所述第二比特用于指示与所述第二比特关联的频域资源不可用；
    所述频域资源的分配类型为连续频域资源，所述第二指示信息包括资源指示取值，所述资源指示取值用于确定所述n个终端设备的频域资源起点和频域资源持续的连续资源块长度。
  21. 一种数据传输装置，其特征在于，包括：
    处理单元，用于确定第一下行控制信息；
    通信单元，用于向n个终端设备发送第一下行控制信息；其中，所述第一下行控制信息用于指示所述n个终端设备传输数据，n为大于或等于2的整数。
  22. 根据权利要求21所述的装置，其特征在于，
    所述第一下行控制信息包括调制解调参考信号DMRS天线端口指示信息，所述DMRS天线端口指示信息用于指示所述n个终端设备对应的第一序列值。
  23. 根据权利要求21-22任一项所述的装置，其特征在于，
    所述通信单元，还用于向所述n个终端设备发送第一信息，所述第一信息包括第一对应关系表，所述第一对应关系表包括至少一个第一序列值和至少一个第二序列值与DMRS天线端口的对应关系。
  24. 根据权利要求21-22任一项所述的装置，其特征在于，
    所述通信单元，还用于向所述n个终端设备发送第二信息，所述第二信息包括n的值以及所述n个终端设备并行传输数据的总层数，所述第二信息用于所述n个终端设备根据预定义的第一关系表集合确定第一对应关系表，所述第一关系表集合包括至少一个所述第一对应关系表，所述第一对应关系表包括至少一个第一序列值和至少一个第二序列值与DMRS天线端口的对应关系。
  25. 根据权利要求23-24任一项所述的装置，其特征在于，
    所述通信单元，还用于向所述n个终端设备发送第一指示信息，所述第一指示信息用于指示所述n个终端设备中每个终端设备对应的所述第二序列值。
  26. 根据权利要求25所述的装置，其特征在于，
    所述n个终端设备的频域资源不完全重叠时，所述n个终端设备包括m个目标组，所述m个目标组中同一个目标组内的用于终端设备传输数据的频域资源相同，所述m个目标组中不同目标组内的用于终端设备传输数据的频域资源不完全相同，m为大于或等于2的整数。
  27. 根据权利要求26所述的装置，其特征在于，
    所述第一对应关系表还包括：至少一个组标识与DMRS天线端口的对应关系，所述至少一个组标识与至少一个目标组对应。
  28. 根据权利要求27所述的装置，其特征在于，
    所述通信单元，还用于向第一目标组的终端设备发送所述第一目标组的组标识， 所述组标识用于使属于所述第一目标组中的终端设备确定属于所述第一目标组，所述第一目标组为所述m个目标组中的任一个。
  29. 根据权利要求21-28任一项所述的装置，其特征在于，所述第一下行控制信息包括第二指示信息，所述第二指示信息用于指示所述n个终端设备进行数据传输时使用的频域资源。
  30. 根据权利要求29所述的装置，其特征在于，
    所述频域资源的分配类型为离散频域资源时，所述第二指示信息包括至少一个第一比特和至少一个第二比特，其中，所述第一比特用于指示与所述第一比特关联的频域资源可用，所述第二比特用于指示与所述第二比特关联的频域资源不可用；
    所述频域资源的分配类型为连续频域资源，所述第二指示信息包括资源指示取值，所述资源指示取值用于确定所述n个终端设备的频域资源起点和频域资源持续的连续资源块长度。
  31. 一种数据传输装置，其特征在于，包括：
    通信单元，用于接收来自网络设备的第一下行控制信息，所述第一下行控制信息用于指示n个终端设备传输数据，n为大于等于2的整数，所述终端设备为所述n个终端设备中的任一个；
    所述通信单元，还用于根据所述第一下行控制信息与所述网络设备进行数据传输。
  32. 根据权利要求31所述的装置，其特征在于，
    所述第一下行控制信息包括调制解调参考信号DMRS天线端口指示信息，所述DMRS天线端口指示信息用于指示所述n个终端设备对应的第一序列值。
  33. 根据权利要求31-32任一项所述的装置，其特征在于，
    所述通信单元，还用于接收来自网络设备的第一信息，所述第一信息包括第一对应关系表，所述第一对应关系表包括至少一个第一序列值和至少一个第二序列值与DMRS天线端口的对应关系。
  34. 根据权利要求31-32任一项所述的装置，其特征在于，
    所述通信单元，还用于接收来自网络设备的第二信息，所述第二信息包括n的值以及所述n个终端设备并行传输数据的总层数；
    所述装置还包括：
    处理单元，用于根据所述第二信息，从预定义的第一关系表集合中确定第一对应关系表，所述第一关系表集合包括至少一个所述第一对应关系表。
  35. 根据权利要求33-34任一项所述的装置，其特征在于，
    所述通信单元，还用于接收来自所述网络设备的第一指示信息，所述第一指示信息用于指示所述n个终端设备中每个终端设备对应的第二序列值；
    处理单元，用于根据第一序列值以及所述第二序列值，从所述第一对应关系表中确定所述终端设备对应的DMRS天线端口。
  36. 根据权利要求35所述的装置，其特征在于，
    所述n个终端设备的频域资源不完全重叠时，所述n个终端设备包括m个目标组，所述m个目标组中同一个目标组内的用于终端设备传输数据的频域资源相同，所述m个目标组中不同目标组内的用于终端设备传输数据的频域资源不完全相同，m为大于 或等于2的整数。
  37. 根据权利要求36所述的装置，其特征在于，
    所述第一对应关系表还包括：至少一个组标识与DMRS天线端口的对应关系，所述至少一个组标识与至少一个目标组对应。
  38. 根据权利要求37所述的装置，其特征在于，
    所述通信单元，还用于接收来自所述网络设备的第一目标组的组标识，所述组标识用于使属于所述第一目标组中的终端设备确定属于所述第一目标组，所述第一目标组为所述m个目标组中的任一个；
    所述处理单元，还用于根据所述组标识确定所述终端设备属于所述第一目标组。
  39. 根据权利要求31-38任一项所述的装置，其特征在于，所述第一下行控制信息包括第二指示信息，所述第二指示信息用于指示所述n个终端设备进行数据传输时使用的频域资源。
  40. 根据权利要求39所述的装置，其特征在于，
    所述频域资源的分配类型为离散频域资源，所述第二指示信息包括至少一个第一比特和至少一个第二比特，其中，所述第一比特用于指示与所述第一比特关联的频域资源可用，所述第二比特用于指示与所述第二比特关联的频域资源不可用；
    所述频域资源的分配类型为连续频域资源，所述第二指示信息包括资源指示取值，所述资源指示取值用于确定所述n个终端设备的频域资源起点和频域资源持续的连续资源块长度。
  41. 一种芯片，其特征在于，所述芯片包括处理器和通信接口，所述通信接口和所述处理器耦合，所述处理器用于运行计算机程序或指令，以实现如权利要求1-10或权利要求11-20任一项所述的方法，所述通信接口用于与所述芯片之外的其它模块进行通信。
  42. 一种通信装置，其特征在于，包括：处理器，所述处理器与存储器耦合，所述存储器用于存储计算机程序或指令，所述处理器用于执行存储器中的该计算机程序或指令，使得所述通信装置执行权利要求1-10或权利要求11-20任一项所述的方法。
  43. 一种计算机可读存储介质，其特征在于，所述存储介质用于存储计算机程序或指令，所述计算机程序或指令被执行时，使得计算机执行权利要求1-10或权利要求11-20任一项所述的方法。
  44. 一种通信系统，其特征在于，包括：如权利要求21-30任一项所述的数据传输装置和至少一个如权利要求31-40任一项所述的数据传输装置。
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