WO2020199088A1 - Procédé de transmission de données et dispositif de communication - Google Patents

Procédé de transmission de données et dispositif de communication Download PDF

Info

Publication number
WO2020199088A1
WO2020199088A1 PCT/CN2019/080848 CN2019080848W WO2020199088A1 WO 2020199088 A1 WO2020199088 A1 WO 2020199088A1 CN 2019080848 W CN2019080848 W CN 2019080848W WO 2020199088 A1 WO2020199088 A1 WO 2020199088A1
Authority
WO
WIPO (PCT)
Prior art keywords
interface
downlink
uplink
physical channel
physical
Prior art date
Application number
PCT/CN2019/080848
Other languages
English (en)
Chinese (zh)
Inventor
王宇晨
吴毅凌
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.)
Filing date
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 CN201980091859.9A priority Critical patent/CN113424654B/zh
Priority to PCT/CN2019/080848 priority patent/WO2020199088A1/fr
Publication of WO2020199088A1 publication Critical patent/WO2020199088A1/fr

Links

Images

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/02—Terminal devices
    • H04W88/04—Terminal devices adapted for relaying to or from another terminal or user

Definitions

  • This application relates to the field of communications, and more specifically, to a data transmission method and communication device.
  • the wireless multi-hop technology is not the communication between the base station and the user equipment in the traditional sense, but the indirect communication between the base station and the user equipment is realized by means of one or more relay devices.
  • the characteristic is that the direct transmission path in the traditional sense can be divided into multiple short paths to transmit information.
  • LTE long term evolution
  • the mobile communication system terrestrial access network and user equipment (UMTS terrestrial radio access network and user equipment, Uu) interfaces are usually used for data transmission between the base station and the relay equipment.
  • PC5 (ProSe Control 5) interface is usually used for data transmission between the relay device and the user equipment or other relay devices. Therefore, for the relay device, it is necessary to be able to simultaneously process the data communicated with the upper-level node and the data communicated with the lower-level node, which places higher requirements on the processing capability of the relay device.
  • the present application provides a data transmission method, relay device, and user equipment, which can ensure normal data transmission in a multi-hop network while reducing the complexity of processing data by the device and the cost of equipment.
  • a data transmission method including: a first device receives a first indication message sent by a second device, where the first indication message is used to instruct the first device to use a first interface or a second device.
  • the interface performs data transmission with the second device, where, when the second device is a base station, the first indication message instructs the first device to perform data transmission with the second device through the first interface
  • the first device sends a second instruction message to a third device, the second instruction message is used to instruct the third device to perform data transmission with the first device through the first interface or the second interface, wherein, at least one uplink physical channel of the second interface and at least one downlink physical channel of the first interface use the same modulation mode, and the uplink physical channel and the downlink physical channel of the first interface use different modulation modes.
  • the interface between the first device and the second device and the first device and the third device can be flexibly selected for data transmission, so that the first device can realize the reception on the parent link and the child link Process reuse, reducing equipment complexity and cost.
  • the uplink physical shared channel of the second interface and the downlink physical shared channel of the first interface use the same coding mode; and/or the second The uplink physical channel carrying the control information of the interface and the downlink physical channel carrying the control information of the first interface adopt the same coding mode.
  • the first device can realize the multiplexing of the encoding and decoding process.
  • the uplink and downlink physical channels of the first interface adopt different encoding methods, so that the data encoding method can be compared with that of the first device and The decoding capability of the second device is compatible.
  • the uplink physical shared channel of the second interface and the downlink physical shared channel of the second interface use the same coding mode; and/or the second The uplink physical channel carrying the control information of the interface and the downlink physical channel carrying the control information of the second interface adopt the same coding mode.
  • the physical resource used for downlink transmission of the first interface is the same as the physical resource used for downlink of the second interface; and/or the first interface
  • the physical resource used for uplink transmission of the second interface is the same as the physical resource used for downlink of the second interface.
  • the physical resources include time domain resources and/or frequency domain resources.
  • the time domain resource includes: the time used for transmission in each transmission time interval TTI, the number of symbols in each TTI, and the number of symbols in each TTI. Symbol time length.
  • the symbol time length includes the cyclic prefix CP time length of the symbol.
  • the frequency domain resources include: the number of subcarriers of the resource block and the bandwidth of the subcarrier at a specific position of the resource block, wherein the resource block includes Carrier or physical resource block.
  • the first indication message or the second indication message includes at least one of the following: a synchronization channel base sequence, a period of a synchronization signal, and a synchronization signal in a fixed time period Offset, physical broadcast channel PBCH time-frequency position, broadcast message, system message or radio resource control RRC message.
  • the at least one downlink reference signal of the first interface and the uplink reference signal of the second interface adopt the same base sequence and/or resource block RE mapping mode .
  • At least one uplink physical channel and downlink physical channel of the second interface and the downlink physical channel of the first interface use the same order mapping table and/ Or transport block size TBS table.
  • the first interface and the second interface adopt different timing advance offsets N TA-offset .
  • the second interface when the preset interval between adjacent radio frames of the first interface is T, the second interface adopts a time advance offset N TA -offset makes the preset interval between adjacent radio frames of the second interface also T.
  • a communication device including: a receiving unit configured to receive a first indication message sent by a second device, where the first indication message is used to instruct the first device to communicate with each other through a first interface or a second interface The second device performs data transmission, where when the second device is a base station, the first indication message instructs the first device to perform data transmission with the second device through the first interface; and A unit, configured to send a second instruction message to a third device, where the second instruction message is used to instruct the third device to perform data transmission with the first device through the first interface or the second interface, where: At least one uplink physical channel of the second interface and at least one downlink physical channel of the first interface use the same modulation mode, and the uplink physical channel and the downlink physical channel of the first interface use different modulation modes.
  • the uplink physical shared channel of the second interface and the downlink physical shared channel of the first interface use the same coding mode; and/or the second The uplink physical channel carrying the control information of the interface and the downlink physical channel carrying the control information of the first interface adopt the same coding mode.
  • the uplink physical shared channel of the second interface and the downlink physical shared channel of the second interface use the same coding mode; and/or the second The uplink physical channel carrying the control information of the interface and the downlink physical channel carrying the control information of the second interface adopt the same coding mode.
  • the physical resource used for downlink transmission of the first interface is the same as the physical resource used for downlink of the second interface; and/or the first interface
  • the physical resource used for uplink transmission of the second interface is the same as the physical resource used for downlink of the second interface.
  • the physical resources include time domain resources and/or frequency domain resources.
  • the time domain resource includes: the time used for transmission in each transmission time interval TTI, the number of symbols in each TTI, and the number of symbols in each TTI. Symbol time length.
  • the symbol time length includes the cyclic prefix CP time length of the symbol.
  • the frequency domain resource includes: the number of subcarriers of the resource block and the bandwidth of the subcarrier at a specific position of the resource block, wherein the resource block includes Carrier or physical resource block.
  • the first indication message or the second indication message includes at least one of the following: a synchronization channel base sequence, a period of a synchronization signal, and a synchronization signal in a fixed time period Offset, physical broadcast channel PBCH time-frequency position, broadcast message, system message or radio resource control RRC message.
  • the at least one downlink reference signal of the first interface and the uplink reference signal of the second interface use the same base sequence and/or resource block RE mapping mode .
  • At least one uplink physical channel and downlink physical channel of the second interface and the downlink physical channel of the first interface use the same order mapping table and/or Transmission block size TBS table.
  • the first interface and the second interface adopt different timing advance offsets N TA-offset .
  • the second interface when the preset interval between adjacent radio frames of the first interface is T, the second interface adopts a time advance offset N TA -offset makes the preset interval between adjacent radio frames of the second interface also T.
  • Fig. 1 is a schematic diagram of a multi-hop network system provided by an embodiment of the present application.
  • FIG. 2 is a schematic flowchart of a data transmission method provided by an embodiment of the present application.
  • FIG. 3 is a schematic diagram of time domain resources used by different interfaces provided by embodiments of the present application.
  • Fig. 4 is a schematic diagram of frame structures of different interfaces provided by embodiments of the present application.
  • FIG. 5 is a schematic diagram of time alignment provided by an embodiment of the present application.
  • FIG. 6 is a schematic diagram of a reference signal mapping manner related to an embodiment of the present application.
  • FIG. 7 is a schematic diagram of another reference signal mapping manner involved in an embodiment of the present application.
  • FIG. 8 is a schematic structural diagram of a communication device provided by an embodiment of the present application.
  • GSM global system of mobile communication
  • CDMA code division multiple access
  • WCDMA broadband code Wideband code division multiple access
  • GPRS general packet radio service
  • LTE FDD frequency division duplex
  • Time Division Duplex Time Division Duplex
  • UMTS Universal Mobile Telecommunication System
  • WiMAX Worldwide Interoperability for Microwave Access
  • 5G 5th generation
  • new radio new radio
  • V2X vehicle-to-everything
  • LTE-V long-term evolution-based vehicle-to-vehicle communication technology
  • vehicle to vehicle vehicle to vehicle
  • V2V vehicle-to-everything
  • MTC manual semi-automatic toll collection system
  • IoT Internet of things
  • LTE machine-to-machine LTE-machine to machine
  • LTE-M machine-to-machine (machine to machine) to machine
  • M2M etc.
  • UE User equipment in the embodiments of this application may refer to terminal equipment, access terminals, user units, user stations, mobile stations, mobile stations, remote stations, remote terminals, mobile equipment, user terminals, terminals, wireless Communication equipment, user agent or user device.
  • the terminal device can also be a cellular phone, a cordless phone, a session initiation protocol (SIP) phone, a wireless local loop (WLL) station, a personal digital assistant (PDA), and a wireless communication Functional handheld devices, computing devices, or other processing devices connected to wireless modems, in-vehicle devices, wearable devices, terminal devices in the future 5G network or future evolution of the public land mobile network (PLMN) Terminal equipment, etc., this embodiment of the present application does not limit this.
  • SIP session initiation protocol
  • WLL wireless local loop
  • PDA personal digital assistant
  • PLMN public land mobile network
  • the base station can be a base transceiver station (BTS) in GSM or CDMA, a base station (NodeB, NB) in WCDMA, or an evolutionary base station (Evolutional NodeB) in LTE. , ENodeB), the base station gNB in 5G, or other network equipment with base station functions, this application is not limited to this.
  • BTS base transceiver station
  • NodeB, NB base station
  • Evolutional NodeB evolution base station
  • ENodeB evolution base station
  • the base station gNB in 5G or other network equipment with base station functions
  • the user equipment, relay device, or network device includes a hardware layer, an operating system layer running on the hardware layer, and an application layer running on the operating system layer.
  • the hardware layer includes hardware such as a central processing unit (CPU), a memory management unit (MMU), and memory (also referred to as main memory).
  • the operating system may be any one or more computer operating systems that implement business processing through processes, for example, Linux operating system, Unix operating system, Android operating system, iOS operating system, or windows operating system.
  • the application layer includes applications such as browsers, address books, word processing software, and instant messaging software.
  • the embodiments of the application do not specifically limit the specific structure of the execution subject of the methods provided in the embodiments of the application, as long as the program that records the codes of the methods provided in the embodiments of the application can be provided according to the embodiments of the application.
  • the execution subject of the method provided in the embodiment of the present application may be a terminal device or a network device, or a functional module in the terminal device or network device that can call and execute the program.
  • Fig. 1 is a schematic diagram of a wireless multi-hop network applicable to an embodiment of the present application.
  • the D2D wireless multi-hop network system 100 shown in FIG. 1 is composed of a base station 101, relay devices 102, 103, and user equipment 104.
  • the base station 101 is a base station that provides services to the user equipment 103, and the relay devices can be in different hops.
  • the relay device whose superior node is the base station is called the first-hop relay device (such as relay device 102), and the relay device whose superior node is other relay devices is called the non-first-hop relay device.
  • the relay device (such as the relay device 103) may be a relay device (such as the relay device 102) whose upper node is a base station.
  • FIG. 1 is only a schematic diagram illustrating the multi-hop network and the various devices that make up the multi-hop network, and does not limit the embodiments of the present application.
  • the number of base stations, relay devices, and user equipment in FIG. There are no restrictions.
  • the number of hops in this application is only for convenience of explanation, and has no limiting effect.
  • a relay device whose superior node is a base station can also become a 0th hop relay device or a second hop relay device.
  • the relay device and the base station can communicate through the Uu interface, and the relay device and the user equipment or the relay device and other relay devices can communicate through the PC5
  • the interface performs side link communication.
  • a Uu interface is used for communication between the relay device 102 and a base station
  • a PC5 interface is used for communication between the relay device 102 and the user equipment 104.
  • the uplink physical channel and the downlink physical channel of the Uu interface use turbo coding, and the modulation method of the uplink physical channel is single carrier frequency division. Multiple access (single-carrier frequency-division multiple, SC-FDM) waveform modulation, and the modulation mode of the downlink physical channel is orthogonal frequency division multiplexing (OFDM) waveform modulation.
  • SC-FDM single-carrier frequency-division multiple
  • OFDM orthogonal frequency division multiplexing
  • both the downlink physical channel of the Uu interface and the physical channel of the PC5 interface for sideline communication use turbo coding. Therefore, the user equipment that needs to access the network has turbo decoding capability, which increases the complexity and complexity of the user equipment. Cost, not suitable for electricity meter reading business.
  • the downlink physical channel of the Uu interface and the physical channel of the PC5 interface for sideline communication use different modulation waveforms, reference signals, mapping resources, etc., so that the first relay device cannot reuse the receiving process and increase the first The complexity of data processing by the relay device and the cost of the first relay device.
  • an embodiment of the present application provides a data transmission method.
  • FIG. 2 shows a schematic flowchart of a data transmission method according to an embodiment of the present application.
  • S201 The first device receives first indication information sent by the second device.
  • the first device is a relay device
  • the second device is a parent node of the first device
  • the second device may be a base station or another relay device.
  • the first indication information is used to instruct the first device to perform data transmission with the second device through the first interface.
  • the first indication information is used to instruct the first device to perform data transmission with the second device through the first interface or the second interface.
  • the first indication information sent by the base station to the first device instructs the first device to perform data transmission with the base station through the first interface;
  • the parent node of the relay device is In the case of other relay devices, the first indication information indicates that the first relay device performs data transmission with the parent node through the first interface or the second interface.
  • the first relay device and the base station can transmit data through the first interface, and the relay device and the relay device or between the relay device and the user equipment can be through the first interface or the second interface. Perform data transfer.
  • S202 The first device sends second indication information to the third device.
  • the first device is a relay device
  • the third device may be a child node of the first device, for example, it may be at least one other relay device or user equipment.
  • the first device sends second instruction information to the third device, where the second instruction information is used to instruct the third device to perform data transmission with the first device through the first interface or the second interface.
  • the first device and the subordinate node of the first device can perform data transmission through the first interface or the second interface.
  • the parent link and the child link of the relay device can flexibly select the interface type for data transmission, for example, the relay device and the base station Communication between the relay device and other relay devices or between the relay device and the user equipment can be through the first interface or the second interface.
  • the embodiment of this application sets the first interface and the second interface so that at least one uplink physical channel of the second interface and the downlink physical channel of the first interface have the same modulation mode, so that the relay device can reuse the parent
  • the receiving process of links and sub-links reduces the complexity and cost of relay equipment.
  • the processing capabilities of a base station and a relay device or user equipment are different.
  • the base station has a relatively strong processing capability, while the relay device or a user equipment may have a relatively weak processing capability. Therefore, when the base station and the relay device or the base station and the user equipment communicate through the first interface, the first interface can satisfy: the uplink physical channel and the downlink physical channel adopt different modulation methods, that is, the uplink and downlink of the first interface There is no pair of uplink and downlink physical channels with the same modulation mode in the physical channels.
  • the downlink physical channel of the first interface and the uplink physical channel of the second interface use the same modulation mode, and the uplink and downlink physical channels of the first interface use different modulation modes.
  • the downlink physical channel of the first interface and the uplink physical channel of the second interface use the same modulation mode, where the downlink physical channel of the first interface may be a downlink physical channel that carries control information, for example, a physical downlink Control channel (physical downlink control channel, PDCCH) or physical hybrid automatic retransmission indicator channel (physical hybrid ARQ channel, PHICH), or narrowband internet of things (NB-IoT) system in the downlink control channel (narrow) physical downlink control channel, NPDCCH);
  • the uplink physical channel of the second interface can be an uplink physical channel that carries control information, for example, it can be an uplink physical control channel (physical uplink control channel, PUCCH) or an uplink physical channel in the NB-IoT system Control channel (narrow physical uplink control channel, NPUCCH) or uplink physical control channel (IAB physical uplink control channel, IPUCCH) involved in the second interface of this application; or, the downlink physical channel of the first interface and the uplink physical channel of the second interface
  • the uplink and downlink physical channels of the first interface adopt different debugging methods.
  • the uplink physical channel of the first interface may adopt SC-FDM waveform modulation
  • the downlink channel may adopt OFDM waveform modulation.
  • the uplink physical channel and downlink physical channel of the first interface may be: PUSCH and PDSCH of the first interface or PUCCH and PDCCH of the first interface, etc.
  • the downlink physical channel of the first interface may also be PHICH.
  • the uplink control channel of the second interface and the downlink control channel of the first interface can use the same coding mode; wherein, the downlink control channel of the second interface can also be PHICH, that is, the PUCCH of the second interface is the same as that of the first interface.
  • the PHICH of the interface adopts the same coding method.
  • the uplink and downlink physical shared channels of the first interface adopt different coding modes respectively; or, the uplink and downlink physical control channels of the first interface adopt different coding modes respectively.
  • the uplink shared physical channel of the first interface adopts turbo coding
  • the downlink shared physical channel may adopt tail-biting convolutional coding.
  • the physical resource used for uplink transmission of the second interface is the same as the physical resource used for downlink transmission of the first interface, and the physical resource may be a time domain resource and/or a frequency domain resource.
  • the physical resources used for uplink and downlink transmission of the first interface are different, and the physical resources may be time domain resources and/or frequency domain resources.
  • the at least one uplink physical channel and downlink physical channel of the second interface and the downlink physical channel of the first interface use the same order mapping table and/or transmission block size (TBS) table.
  • TBS transmission block size
  • the downlink reference signal of the first interface and the uplink reference signal of the second interface adopt the same base sequence and/or resource element (RE) mapping manner.
  • RE resource element
  • the uplink and downlink physical channels of the second interface may use the same modulation and/or coding mode, or the physical resources used for uplink and downlink transmission of the second interface are the same, that is, the uplink and downlink physical channels of the second interface
  • the modulation mode of the first interface is the same as that of the downlink physical channel; and/or the coding mode of the uplink and downlink physical channels of the second interface is the same as the coding mode of the downlink physical channel of the first interface; and/or, the second
  • the physical resources of the interface used for uplink and downlink transmission are the same as the physical resources of the first interface used for downlink transmission.
  • the uplink and downlink physical channels of the second interface may be PUSCH and PDSCH, and the downlink physical channel of the first interface may be PDSCH; or, the uplink and downlink physical channels of the second interface may be PUCCH and PDCCH, and the downlink physical channel of the first interface It can be PDCCH or PHICH.
  • the following introduces the modulation mode, coding mode, and reference signal that can be adopted by the first interface and the second interface of the present application.
  • the uplink physical channel of the first interface may include: PUCCH, PUSCH; the downlink physical channel of the first interface may include: PDCCH, PDSCH, physical broadcast channel (physical broadcast channel) , PBCH), PHICH.
  • the channel coding mode, modulation mode, and reference signal adopted by different uplink physical channels or downlink physical channels of the first interface are shown in Table 1 respectively.
  • the coding methods of PDCCH, PDSCH, and PBCH are all tail-biting convolutional coding
  • the modulation method is OFDM waveform modulation
  • the reference signal is cell reference signal (CRS)
  • PUCCH uses repeated coding method, and SC-FDM waveform modulation , And demodulation reference signal (demodulation reference signal, DMRS) mapping mode
  • PUSCH adopts Turbo coding mode, SC-FDM waveform modulation and DMRS mapping mode.
  • the coding mode, modulation waveform and reference signal adopted by each physical channel are shown in Table 1.
  • mapping modes of CRS and DMRS are different. It can be seen from the modulation mode, coding mode and reference signal of the uplink physical channel and physical downlink channel of the Uu interface that for each uplink physical channel of the Uu interface, there is no downlink physical channel of the Uu interface, so that both meet the coding mode. , Modulation mode and resource mapping are the same.
  • the physical channel of the second interface may be designed.
  • the channel coding mode, modulation mode, and reference signal adopted by different physical channels of the second interface are shown in Table 2.
  • the uplink shared channel (IBA physical uplink shared channel, IPUSCH) in Table 2 has the same substantive function as the PUSCH, and is only used to facilitate the distinction between the uplink shared channel of the interface designed in the embodiment of the present application.
  • the uplink control channel (IBA physical uplink shared channel, IPUSCH) has the same substantive function as the PUCCH, and is only used to facilitate the distinction between the uplink control channel of the interface designed in the embodiment of the application.
  • both the PHICH of the first interface and the IPUCCH of the second interface adopt the RM coding method, OFDM waveform modulation, and the reference signal is CRS. Therefore, the PHICH of the first interface and the IPUCCH of the second interface have the same The encoding method, modulation method and reference signal.
  • the IPUSCH of the second interface and the PDSCHs of the first and second interfaces use tail-biting convolution coding, OFDM waveform and CRS reference signal. Therefore, the PDSCH of the first interface and the PDSCH of the second interface have the same coding method , Modulation method and reference signal.
  • the at least one downlink physical channel of the first interface and the uplink physical channel of the second interface use the same coding mode, modulation mode, and reference signal.
  • the at least one downlink reference signal of the first interface and the uplink reference signal and the downlink reference signal of the second interface adopt the same base sequence and RE mapping mode.
  • the reference signal CRS of the first interface and the reference signal of the second interface relay the node-specific reference signal (IAB-node-specific reference signal, IRS) and the demodulation reference signal (integrated access and backhaul demodulation reference signal) of the second interface. signal, IDMRS)
  • the IDMRS and the DMRS have the same essential functions, which are only used to facilitate the distinction between the demodulation reference signal of the interface designed in the embodiment of the present application.
  • mapping mode of the single antenna port of CRS, IRS or IDMRS can be as shown in Figure 3.
  • mapping mode of the demodulation reference signal (DMRS) used for uplink transmission of the first interface is shown in FIG. 4. It can be seen that the RE mapping modes used by the reference signals for uplink transmission and downlink transmission of the first interface are different.
  • the uplink transmission of the second interface may only support a single antenna port.
  • the downlink physical channel of the first interface and the uplink physical channel of the second interface and the downlink physical channel adopt the same modulation & coding scheme (modulation & coding scheme) to end the mapping table.
  • the downlink physical channel of the first interface can be PDSCH or other downlink physical channels
  • the uplink physical channel and downlink physical channel of the second interface can be IPUSCH, IPDSCH, or other corresponding physical channels. This is not limited.
  • the downlink reference signal of the first interface and the uplink reference signal and the downlink reference signal of the second interface use the same base sequence.
  • the base sequences of the reference signals CRS, IRS, and IDMRS are all formula 1:
  • r l, ns are: l is the symbol number in a slot, n s is the slot number, r l, ns is the value of the base sequence mapped on the corresponding OFDM symbol of the corresponding slot in a frame.
  • m is the absolute force carrier index of the transmission reference signal carrier
  • c is a pseudo-random sequence.
  • DMRS base sequence is Formula 2:
  • u is high-level parameter configuration
  • ⁇ is a phase rotation value
  • IPUSCH and PDSCH can use the same TBS table and scrambling code seed generation formula; or, IPUCCH and PHICH can use the same modulation method, TBS table, and scrambling code seed generation formula; or, any downlink physical channel of the first interface It has the same CRS sequence formula or scrambling code seed generation formula as the second interface uplink physical channel.
  • the uplink physical channel of the second interface when adopts a waveform modulation method, the uplink physical channel of the second interface also adopts the same modulation method, so that the first relay device can reuse the receiving process and improve the data Transmission efficiency.
  • the uplink and downlink physical channels of the first interface can adopt different modulation modes to adapt to the processing capabilities of the base station and the relay device respectively.
  • the uplink and downlink physical channels of the second interface may also adopt the same modulation mode.
  • the uplink and downlink physical channels of the second interface both adopt OFDM waveform modulation.
  • the uplink physical channel and the downlink physical channel of the second interface may both use the same coding mode, modulation mode, reference signal or other mapping resources as the downlink physical channel of the first interface.
  • the uplink physical channel of the second interface and the downlink physical channel of the second interface both use tail-biting convolutional coding; or, the uplink physical channel of the second interface and the downlink physical channel of the second interface both use OFDM waveform modulation, etc. .
  • the same resource used for uplink transmission of the second interface and the resource used for downlink transmission of the first interface may be the same as the uplink time domain resource of the second interface and the downlink time domain resource of the first interface, or it may be the first interface.
  • the uplink frequency domain resource of the second interface is the same as the downlink frequency domain resource of the first interface, or both are the same.
  • the specific description of the uplink transmission and downlink transmission of the second interface that is the same as the downlink transmission of the first interface is similar to the above description of the uplink transmission of the second interface and the downlink transmission of the first interface. Repeat, not repeat them here.
  • the uplink time domain resource of the second interface is the same as the downlink time domain resource of the first interface may include: the time used for uplink transmission in each transmission time interval TTI of the second interface and the time used for each TTI of the first interface
  • the time for downlink transmission is the same, and the number of uplink symbols in each TTI of the second interface is the same as the number of downlink symbols in each TTI of the first interface, and the uplink symbols in each TTI of the second interface are the same as those of the first interface
  • the downlink symbol time length of the corresponding position in each TTI is the same.
  • the time used for uplink transmission in each transmission time interval TTI of the second interface is the same as the time used for downlink transmission in each TTI of the first interface.
  • Figure 5 is a schematic diagram of time-frequency resource transmission in a multi-hop network.
  • the wireless frame of the first interface used by the base station and the first relay device for data transmission (hereinafter referred to as the first wireless frame)
  • the wireless frame of the second interface used by the first relay device and the first device for data transmission The frame structure of the frame (hereinafter referred to as the second wireless frame) is different, wherein the structures of the first wireless frame and the second wireless frame in this embodiment are shown in FIG. 6(a) and FIG. 6(b), respectively.
  • Fig. 6(a) shows the frame structure of the first radio frame.
  • each radio frame with a length of 10 milliseconds (ms) on the first interface includes 5 subframes with a length of 2 ms, in which time slots (slot) #0 and slot #1 are allocated for Downlink (DL) transmission, slot#3, slot#4 are allocated for uplink (uplink, UL) transmission, between the downlink transmission time slot and the uplink transmission time slot is a special time slot slot#2 Among them, the structure of the special time slot includes the downlink pilot time slot (DwPTS), the guard time slot GAP between the uplink and the downlink, and the uplink pilot time slot (UpPTS).
  • DwPTS downlink pilot time slot
  • GAP guard time slot
  • UpPTS uplink pilot time slot
  • Figure 6(b) shows the frame structure of the second radio frame.
  • the time slots slot#0 and slot#1 are used for downlink transmission
  • the time length of slot#0 and slot#1 is 240Ts
  • the special time slot slot includes the time of the downlink pilot time slot.
  • time slots slot#3 and slot#4 are used for uplink transmission.
  • the uplink time domain resource of the second interface is the same as the downlink time domain resource of the first interface may also include: uplink symbols in each TTI of the second interface and downlink symbols in corresponding positions in each TTI of the first interface Have the same cyclic prefix (CP) time length.
  • CP cyclic prefix
  • the same uplink frequency domain resource of the second interface and the downlink frequency domain resource of the first interface may include at least one of the following: the uplink resource block of the second interface has the same number of subcarriers as the downlink resource block of the first interface , And the bandwidth of the subcarrier of the uplink resource block and the subcarrier of the corresponding position of the downlink resource block are the same.
  • the resource block may be a carrier or a physical resource block.
  • At least one uplink physical channel of the second interface is the same as one or more of the coding mode, modulation mode, reference signal, mapping mode, etc. of the downlink physical channel of the first interface.
  • the first instruction information and the second instruction information are specifically introduced.
  • the first indication information and the second indication information may include reference information, and the reference information is information corresponding to different interfaces, for example, a synchronization channel base sequence set, a period of a synchronization signal, and a time-frequency position of the synchronization signal , The offset of the synchronization signal in a fixed time period or the PBCH time-frequency position, etc.; or, the first indication information and the second indication information may also include explicit indication information or implicit indication information, the explicit indication information For example, the interface used by the relay device or the user equipment may be directly indicated in the first indication information.
  • the base sequence set corresponding to different interfaces, the period of the synchronization signal, the time-frequency position of the synchronization signal, the offset of the synchronization signal in a fixed time period or the PBCH time-frequency position are different.
  • description is made when the first interface is a Uu interface.
  • the base sequence used when generating the secondary synchronization signal can come from different base sequence sets. Since the base sequence sets of different interfaces include different base sequences, the user equipment can generate the SSS based on the base sequence. Sequence to determine the type of wireless interface to be used corresponding to the SSS, thereby determining the wireless interface used.
  • formula (1) to formula (4) are SSS generation formulas for the first interface:
  • Formula (5) to Formula (8) are the SSS generating formulas of the second interface:
  • SSS 1 (n) is SSS 1 is the first ZC sequence used to compose the SSS base sequence.
  • SSS 2 (n) is: SSS1 is the second ZC sequence used to form the SSS base sequence.
  • u 1 and u 2 are: parameters used to determine the base sequence.
  • the synchronization signal base sequence combination of the first interface and the second interface is different, and the user equipment or the second relay device can learn the wireless interface to be used according to the blind detection of the synchronization signal.
  • the first indication information and the second indication information may also be broadcast messages, system messages, or unlimited resource control (radio resource control, RRC) messages.
  • RRC radio resource control
  • the first relay device or the base station may carry indication information in the RRC message to indicate the user equipment or the second relay device used interface.
  • the RRC message may be, for example, one or more of an RRC connection establishment message, an RRC reestablishment message, an RRC reply message, or an RRC reconfiguration message.
  • the indication information included in the first indication information and the second indication information may be implicit indications, for example, the indication information indicates the hop count of the first relay device or the first device, and the first device determines according to the hop count Whether it is the first hop node, if it is, the first interface can be used; if it is not the first hop node, the second interface can be used.
  • the protocol or system may specify the counting principle of the number of hops where the relay device is located in the multi-hop system. For example, the protocol or system may specify that the base station is the 0th hop, the first-level relay node that accesses the base station is the first hop, and the number of hops of the relay nodes of each subsequent level is increased by one in turn.
  • the protocol or system may also specify that the first-level relay device that accesses the base station is the 0th hop, and the number of hops of each subsequent level of the relay device is sequentially increased by 1.
  • the indication information included in the first indication information and the second indication information may also be a display indication, for example, an interface type indication.
  • the first relay device may According to the first indication information or other relay devices or user equipment, the used interface may be determined according to the above information included in the second indication information.
  • the relay device or the user equipment may learn the type of the corresponding wireless interface according to the reference message. For example, when the reference information is a synchronization channel base sequence set, the relay device or the user equipment can obtain the base sequence set from which wireless interface base sequence set is selected according to the base sequence constituting the synchronization channel, thereby determining the use The type of wireless interface.
  • the reference information is a synchronization channel base sequence set
  • the relay device or the user equipment can obtain the base sequence set from which wireless interface base sequence set is selected according to the base sequence constituting the synchronization channel, thereby determining the use The type of wireless interface.
  • the base sequence of the synchronization signal can be used to determine which interface the base sequence set belongs to, and then determine to use the interface; or The device or user equipment can determine the type of wireless interface used according to the time-frequency position of the PBCH.
  • the relay device and the user equipment respectively determine the interface to be used according to the instruction information carried in the first instruction information and the second instruction information, and the instruction information may be explicit instruction information or implicit instruction information.
  • the relay device or user equipment may determine the interface to be used according to the instruction information carried in the received broadcast message or system message; or, the relay device or user equipment may determine the interface to be used according to the instruction information in the received RRC message. Interface.
  • the relay device or the user equipment may also determine the interface to be used according to the hop count information sent by the superior node. For example, when the relay device or user equipment determines that it is the first hop node according to the broadcast message or system message of the superior node, it determines to use the first interface; when the relay device or user equipment determines that it is not the first hop node, it determines to use the first interface. Two interface.
  • the upper-level node notifies the lower-level node of the wireless interface used, so that the lower-level node can effectively complete the transmission in the multi-hop network, and at the same time effectively save the public resource overhead of the multi-hop network.
  • This embodiment uses different interfaces for data transmission between different network element nodes in a multi-hop network, so that the first relay device can reuse the receiving process of the parent link and the child link, minimize the complexity of the receiving module, and reduce Equipment cost.
  • the first interface or the second interface is used for data transmission between the relay device and the relay device and between the relay device and the user equipment, and the first interface and the second interface are set so that the user equipment can reproduce data. Using the receiving process of the first interface and the second interface reduces the complexity of processing data and the cost of equipment.
  • the base station and the first relay device When the base station and the first relay device perform data transmission through the first interface, and the first relay device and the second relay device or the user equipment perform data transmission through the second interface, for the first relay device, Its connection to the parent link (the transmission link between the base station and the first relay device) and the child link (the transmission link between the first relay device and the second relay device or the first relay device and the user equipment)
  • the transmission or reception time of needs to be aligned to minimize cross interference and extend the length of the guard interval to ensure the normal transmission and reception conversion of the filter tail. This effect requires a timing advance parameter T A is achieved by adjusting the first relay device.
  • Figure 7 shows a schematic diagram of timing advance.
  • the time for the base station to receive the uplink information sent by the first relay device is delayed.
  • the sub-link between the first relay device and the second relay device or the first relay device and the user equipment also has a transmission delay.
  • the sending or receiving time on the parent link and the child link of the first relay device needs to be aligned.
  • the time of the downlink information sent by the first relay device to the second relay device or the user equipment and the first relay device The time for sending uplink information to the base station needs to be aligned; or, the time when the first relay device receives the uplink information sent by the second relay device or the user equipment and the time when the first relay device receives the downlink information sent by the base station need to be aligned.
  • the frame structure of the wireless frame of the first interface is shown in Figure 6(a), and the frame structure of the wireless frame of the second interface is shown in Figure 6(b).
  • the timing advance parameter between the first relay device and the base station By adjusting the timing advance parameter between the first relay device and the base station, the time of the uplink information sent by the first relay device to the base station can be aligned.
  • the timing advance scheme of the first interface is:
  • T [(N TA +N TA-offset ) ⁇ Ts]s
  • T is the time advance required for transmission through the first interface
  • N TA-offset is the time advance set based on the guard slot GAP in the wireless frame
  • the radio frame of the first interface is the radio frame of the first interface shown in FIG. 3, in order to ensure that there is a necessary guard interval when switching between uplink transmission and downlink transmission, the uplink transmission subframe UL Advance 20Ts (the duration of GAP is 40Ts), so that there is a guard interval of 20Ts between UL and DL of the next TTI.
  • N TA-offset of the first interface 20Ts.
  • the second interface The time length of the GAP used to adjust the time advance in the wireless frame can be flexibly set according to the required time advance. For example, when setting the protection timeslot GAP of the second interface, both the timing advance in the parent link of the first relay device and the timing advance of the child link need to be considered. In other words, the second interface The setting of the guard time slot GAP in the frame structure of, can meet the sum of the time advance required by the parent link and the child link.
  • the GAP time length between the downlink subframe and the uplink subframe in the radio frame of the second interface is set according to the time advance in the parent link and the time advance in the child link. Specifically, when the preset guard interval between adjacent radio frames of the first interface is T, the second interface presets a time advance of N TA-offset so that the interval between adjacent radio frames of the second interface Also T.
  • N TA-offset can take a different value.
  • the i-th hop relay node should satisfy the following relationship:
  • N TA,i-1 is the time advance of the i-1th hop relay device for the time delay caused by the transmission distance
  • N TA, i is the time advance of the i-1th hop relay device for the time delay caused by the transmission distance
  • T RTT, i is the signal round-trip time between the i-th hop device and its parent node
  • N TA,i cannot be a negative value
  • N TA-offset cannot reuse the value of the first interface
  • Fig. 8 shows a schematic structural diagram of the communication device provided by the present application.
  • the communication device shown in FIG. 8 may be the relay device mentioned above.
  • the communication device 800 can be used to implement the above steps performed by the relay device.
  • the communication device 800 includes a receiving unit 810 and a sending unit 820.
  • the receiving unit 810 is configured to receive a first indication message sent by a second device at a first device (that is, a relay device), where the first indication message is used to instruct the first device to communicate with the first device through the first interface or the second interface.
  • the second device performs data transmission, where when the second device is a base station, the first indication message instructs the first device to perform data transmission with the second device through the first interface.
  • the sending unit 820 is configured to send a second indication message to a third device, where the second indication message is used to instruct the third device to perform data transmission with the first device through the first interface or the second interface, where At least one uplink physical channel of the second interface and at least one downlink physical channel of the first interface use the same modulation mode, and the uplink physical channel and the downlink physical channel of the first interface use different modulation modes.
  • B corresponding to A means that B is associated with A, and B can be determined according to A.
  • determining B according to A does not mean that B is determined only according to A, and B can also be determined according to A and/or other information.
  • the disclosed system, device, and method may be implemented in other ways.
  • the device embodiments described above are only illustrative.
  • the division of the units is only a logical function division, and there may be other divisions in actual implementation, for example, multiple units or components can be combined or It can be integrated into another system, or some features can be ignored or not implemented.
  • the displayed or discussed mutual coupling or direct coupling or communication connection may be indirect coupling or communication connection through some interfaces, devices or units, and may be in electrical, mechanical or other forms.
  • the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the objectives of the solutions of the embodiments.
  • each unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units may be integrated into one unit.
  • the function is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer readable storage medium.
  • the technical solution of this application essentially or the part that contributes to the existing technology or the part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including Several instructions are used to make a computer device (which may be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the method described in each embodiment of the present application.
  • the aforementioned storage media include: U disk, mobile hard disk, read-only memory (Read-Only Memory, ROM), random access memory (Random Access Memory, RAM), magnetic disk or optical disk and other media that can store program code .

Landscapes

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

Abstract

L'invention concerne un procédé de transmission de données et un appareil de communication. Dans le procédé selon l'invention : un dispositif de relais effectue une transmission de données avec une station de base au moyen d'une première interface, et le dispositif de relais effectue une transmission de données avec un autre dispositif de relais ou avec un dispositif utilisateur au moyen d'une deuxième interface, au moins un canal physique de liaison montante de la deuxième interface utilisant le même mode de modulation qu'au moins un canal physique de liaison descendante de la première interface, et le canal physique de liaison montante et le canal physique de liaison descendante de la première interface utilisant différents modes de modulation. La présente invention permet de résoudre le problème de la complexité élevée de dispositif entraînée par un dispositif de relais inapte à répéter un processus de réception en raison du fait que la liaison parent et la liaison enfant du dispositif de relais utilisent des modes de modulation différents, et réduit la complexité et les coûts du dispositif tout en assurant la transmission normale des données.
PCT/CN2019/080848 2019-04-01 2019-04-01 Procédé de transmission de données et dispositif de communication WO2020199088A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN201980091859.9A CN113424654B (zh) 2019-04-01 2019-04-01 数据传输的方法及通信设备
PCT/CN2019/080848 WO2020199088A1 (fr) 2019-04-01 2019-04-01 Procédé de transmission de données et dispositif de communication

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2019/080848 WO2020199088A1 (fr) 2019-04-01 2019-04-01 Procédé de transmission de données et dispositif de communication

Publications (1)

Publication Number Publication Date
WO2020199088A1 true WO2020199088A1 (fr) 2020-10-08

Family

ID=72664858

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2019/080848 WO2020199088A1 (fr) 2019-04-01 2019-04-01 Procédé de transmission de données et dispositif de communication

Country Status (2)

Country Link
CN (1) CN113424654B (fr)
WO (1) WO2020199088A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115004795A (zh) * 2022-04-29 2022-09-02 北京小米移动软件有限公司 传输定时调整方法、装置及存储介质

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017167571A1 (fr) * 2016-04-01 2017-10-05 Sony Corporation Dispositif de communication, équipement d'infrastructure et procédé
CN108631917A (zh) * 2017-03-24 2018-10-09 中兴通讯股份有限公司 一种信息传输方法及装置
CN109155905A (zh) * 2016-05-20 2019-01-04 华为技术有限公司 一种业务消息发送方法、终端设备以及网络设备
CN109246793A (zh) * 2017-05-17 2019-01-18 华为技术有限公司 多链接的数据传输方法及装置
CN109245845A (zh) * 2017-05-05 2019-01-18 中兴通讯股份有限公司 一种信令传输方法及设备

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101925189A (zh) * 2009-06-15 2010-12-22 大唐移动通信设备有限公司 一种避免接口传输冲突的方法、装置和系统
CN102237989B (zh) * 2010-05-04 2015-08-12 中兴通讯股份有限公司 一种数据传输的方法及系统
US20110310789A1 (en) * 2010-06-21 2011-12-22 Teck Hu Method of uplink control channel allocation for a relay backhaul link
CN108391285B (zh) * 2017-02-03 2023-05-05 中兴通讯股份有限公司 一种设备直通系统的通信方法、数据转发方法及装置

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017167571A1 (fr) * 2016-04-01 2017-10-05 Sony Corporation Dispositif de communication, équipement d'infrastructure et procédé
CN109155905A (zh) * 2016-05-20 2019-01-04 华为技术有限公司 一种业务消息发送方法、终端设备以及网络设备
CN108631917A (zh) * 2017-03-24 2018-10-09 中兴通讯股份有限公司 一种信息传输方法及装置
CN109245845A (zh) * 2017-05-05 2019-01-18 中兴通讯股份有限公司 一种信令传输方法及设备
CN109246793A (zh) * 2017-05-17 2019-01-18 华为技术有限公司 多链接的数据传输方法及装置

Also Published As

Publication number Publication date
CN113424654A (zh) 2021-09-21
CN113424654B (zh) 2022-08-26

Similar Documents

Publication Publication Date Title
JP5763782B2 (ja) チャネル品質指標のレポート
US10965509B2 (en) Method for setting reference signal for V2V communication in wireless communication system and device for same
US10848362B2 (en) Method for electricity measurement for V2V communications in wireless communication system, and device for same
CA3030456C (fr) Procede et equipement terminal servant a transmettre des donnees
KR20200058558A (ko) 무선 통신 시스템에서 데이터를 송수신하기 위한 방법 및 이를 위한 장치
JP2015523825A (ja) 方法及び装置
JP6254698B2 (ja) 無線通信システムにおいて装置対装置端末の信号送信方法及び装置
CN110959266A (zh) 在新无线电网络中允许交叉传输时间间隔(tti)切换和混合自动重复请求(harq)操作的设备和方法
EP4017177B1 (fr) Procédé et appareil de multiplexage de ressources
WO2019024756A1 (fr) Procédé de communication, dispositif de réseau et dispositif relais
US11632219B2 (en) Resource determining method, indication method, and apparatus
JP2018538729A (ja) データ伝送方法、ネットワーク装置、及び端末装置
WO2018082678A1 (fr) Procédé de communications, et appareil de communications
US20230053388A1 (en) Terminal and communication method
EP3503454A1 (fr) Procédé de transmission d'informations de commande, équipement utilisateur et dispositif de réseau
JP2020519205A (ja) 無線通信システムにおける端末のＤ２Ｄ（ｄｅｖｉｃｅ ｔｏ ｄｅｖｉｃｅ）動作方法及び前記方法を利用する端末
WO2019028802A1 (fr) Procédé et dispositif d'envoi et de réception de signal
CN110521154B (zh) 无线通信系统中终端执行v2x控制信息捎带的方法和使用该方法的终端
RU2720979C1 (ru) Устройство и способ конфигурации подкадра
WO2020199088A1 (fr) Procédé de transmission de données et dispositif de communication
WO2016169479A1 (fr) Procédé et dispositif d'émission de données
JP2020520134A (ja) 無線通信システムにおいて信号を生成する方法及び装置
CN116261844A (zh) 一种侧行链路通信方法及装置
WO2023119756A1 (fr) Dispositif de communication et procédé de communication
US20240195570A1 (en) Communication device and communication method

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 19922302

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 19922302

Country of ref document: EP

Kind code of ref document: A1