CN113424654A

CN113424654A - Data transmission method and communication equipment

Info

Publication number: CN113424654A
Application number: CN201980091859.9A
Authority: CN
Inventors: 王宇晨; 吴毅凌
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2019-04-01
Filing date: 2019-04-01
Publication date: 2021-09-21
Anticipated expiration: 2039-04-01
Also published as: WO2020199088A1; CN113424654B

Abstract

The application provides a data transmission method and a communication device. The method comprises the following steps: the relay device and the base station perform data transmission through a first interface, and the relay device and other relay devices or the relay device and the user equipment perform data transmission through a second interface, wherein at least one uplink physical channel of the second interface and at least one downlink physical channel of the first interface adopt the same modulation mode, and the uplink physical channel and the downlink physical channel of the first interface adopt different modulation modes. The technical scheme solves the problem that the relay equipment cannot reuse the receiving process to cause overhigh equipment complexity because the physical channels of the parent link and the child link of the relay equipment adopt different modulation modes, and reduces the equipment complexity and the cost while ensuring the normal transmission of data.

Description

Data transmission method and communication equipment

Technical Field

The present application relates to the field of communications, and in particular, to a method for data transmission and a communication device.

Background

With the development of wireless communication systems, future mobile communication will be a ubiquitous wireless communication system, providing seamless, different quality of service (QoS) and high-rate wireless multimedia services, but the contradiction between high-speed transmission and coverage is an urgent problem to be solved in future communication. Wireless multi-hop technology (WMN) developed in recent years is one of the more ideal solutions to this problem.

The wireless multi-hop technology is not communication between a base station and user equipment in the traditional sense, but realizes non-direct communication between the base station and the user equipment by means of one or more relay devices, wherein the relay devices are mainly characterized in that a direct transmission path in the traditional sense can be divided into a plurality of short paths to transmit information. In a Long Term Evolution (LTE) communication system, a mobile communication system terrestrial access network and a user equipment (UMTS terrestrial access network operator, Uu) interface is generally used for data transmission between a base station and a relay device, and a PC5(ProSe Control 5) interface is generally used for data transmission between the relay device and the user equipment or other relay devices. Therefore, it is necessary for the relay device to be able to simultaneously process data communicated with the upper node and data communicated with the lower node, which puts higher demands on the processing capability of the relay device.

How to ensure normal data transmission in a multi-hop network and reduce the complexity of data processing of equipment and equipment cost becomes an urgent problem to be solved.

Disclosure of Invention

The application provides a data transmission method, relay equipment and user equipment, which can reduce the complexity of equipment for processing data and equipment cost while ensuring normal data transmission in a multi-hop network.

In a first aspect, a method for data transmission is provided, including: a first device receives a first indication message sent by a second device, where the first indication message is used to indicate that the first device performs data transmission with the second device through a first interface or a second interface, and when the second device is a base station, the first indication message indicates that the first device performs data transmission with the second device through the first interface; the first device sends a second indication message to a third device, where the second indication message is used to indicate that the third device performs 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 method, and the uplink physical channel and the downlink physical channel of the first interface use different modulation methods.

According to the data transmission method, the interfaces can be flexibly selected between the first device and the second device and between the first device and the third device for data transmission, so that the first device can realize the multiplexing of receiving processes on a parent link and a child link, and the complexity and the cost of the device are reduced.

With reference to the first aspect, in some implementations of the first aspect, the uplink physical shared channel of the second interface and the downlink physical shared channel of the first interface use the same coding scheme; and/or the uplink physical channel of the second interface for bearing the control information and the downlink physical channel of the first interface for bearing the control information adopt the same coding mode.

According to the data transmission method of the embodiment of the application, the first device can realize multiplexing of the coding and decoding processes, and in addition, the uplink and downlink physical channels of the first interface adopt different coding modes, so that the data coding mode can be adapted to the coding capabilities of the first device and the second device.

With reference to the first aspect, in some implementations of the first aspect, the uplink physical shared channel of the second interface and the downlink physical shared channel of the second interface use the same coding scheme; and/or the uplink physical channel of the second interface for bearing the control information and the downlink physical channel of the second interface for bearing the control information adopt the same coding mode.

With reference to the first aspect, in certain implementations of the first aspect, physical resources used for downlink transmission of the first interface are the same as physical resources used for downlink transmission of the second interface; and/or the physical resource of the second interface for uplink transmission is the same as the physical resource of the second interface for downlink transmission.

With reference to the first aspect, in certain implementations of the first aspect, the physical resources include: time domain resources and/or frequency domain resources.

With reference to the first aspect, in certain implementations of the first aspect, the time domain resource includes: a time for transmission in a per transmission time interval, TTI, and a number of symbols in the per TTI and a symbol time length in the per TTI.

With reference to the first aspect, in certain implementations of the first aspect, the symbol time length comprises a cyclic prefix, CP, time length of the symbol.

With reference to the first aspect, in certain implementations of the first aspect, the frequency domain resources include: the number of subcarriers of a resource block and the bandwidth of the subcarriers at a specific position of the resource block, wherein the resource block comprises a carrier or a physical resource block.

With reference to the first aspect, in certain implementations of the first aspect, the first indication message or the second indication message includes at least one of: a synchronization channel base sequence, a period of a synchronization signal, an offset of the synchronization signal within a fixed time period, a physical broadcast channel PBCH time-frequency position, a broadcast message, a system message or a radio resource control RRC message.

With reference to the first aspect, in certain implementation manners of the first aspect, at least one downlink reference signal of the first interface and an uplink reference signal of the second interface use the same base sequence and/or resource block RE mapping manner.

With reference to the first aspect, in some implementations of the first aspect, at least one uplink physical channel and one downlink physical channel of the second interface and a downlink physical channel of the first interface use the same order mapping table and/or transport block size TBS table.

With reference to the first aspect, in certain implementations of the first aspect, the first interface and the second interface use different time advance offsets N_TA-offset。

With reference to the first aspect, in some implementations of the first aspect, when a preset interval between adjacent radio frames of the first interface is T, the second interface employs a time advance offset N_TA-offsetAnd enabling the preset interval between the adjacent wireless frames of the second interface to be T.

In a second aspect, a communication device is provided, comprising: a receiving unit, configured to receive a first indication message sent by a second device, where the first indication message is used to indicate that the first device performs data transmission with the second device through a first interface or a second interface, and where the first indication message indicates that the first device performs data transmission with the second device through the first interface when the second device is a base station; a sending unit, configured to send a second indication message to a third device, where the second indication message is used to indicate that the third device performs 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 method, and the uplink physical channel and the downlink physical channel of the first interface use different modulation methods.

With reference to the second aspect, in some implementations of the second aspect, the uplink physical shared channel of the second interface and the downlink physical shared channel of the first interface use the same coding scheme; and/or the uplink physical channel of the second interface for bearing the control information and the downlink physical channel of the first interface for bearing the control information adopt the same coding mode.

With reference to the second aspect, in some implementations of the second aspect, the uplink physical shared channel of the second interface and the downlink physical shared channel of the second interface use the same coding scheme; and/or the uplink physical channel of the second interface for bearing the control information and the downlink physical channel of the second interface for bearing the control information adopt the same coding mode.

With reference to the second aspect, in some implementations of the second aspect, the physical resources used for downlink transmission of the first interface are the same as the physical resources used for downlink transmission of the second interface; and/or the physical resource of the second interface for uplink transmission is the same as the physical resource of the second interface for downlink transmission.

With reference to the second aspect, in some implementations of the second aspect, the physical resources include: time domain resources and/or frequency domain resources.

With reference to the second aspect, in some implementations of the second aspect, the time domain resource includes: a time for transmission in a per transmission time interval, TTI, and a number of symbols in the per TTI and a symbol time length in the per TTI.

With reference to the second aspect, in certain implementations of the second aspect, the symbol time length comprises a cyclic prefix, CP, time length of the symbol.

With reference to the second aspect, in some implementations of the second aspect, the frequency domain resources include: the number of subcarriers of a resource block and the bandwidth of the subcarriers at a specific position of the resource block, wherein the resource block comprises a carrier or a physical resource block.

With reference to the second aspect, in some implementations of the second aspect, the first indication message or the second indication message includes at least one of: a synchronization channel base sequence, a period of a synchronization signal, an offset of the synchronization signal within a fixed time period, a physical broadcast channel PBCH time-frequency position, a broadcast message, a system message or a radio resource control RRC message.

With reference to the second aspect, in some implementations of the second aspect, at least one downlink reference signal of the first interface and an uplink reference signal of the second interface use the same base sequence and/or resource block RE mapping manner.

With reference to the second aspect, in some implementations of the second aspect, at least one uplink physical channel and one downlink physical channel of the second interface and a downlink physical channel of the first interface use the same order mapping table and/or transport block size, TBS, table.

With reference to the second aspect, in some implementations of the second aspect, the first interface and the second interface use different time advance offsets N_TA-offset。

With reference to the second aspect, in some implementations of the second aspect, when a preset interval between adjacent radio frames of the first interface is T, the second interface employs a time advance offset N_TA-offsetAnd enabling the preset interval between the adjacent wireless frames of the second interface to be T.

Drawings

Fig. 1 is a schematic diagram of a multi-hop network system according to an embodiment of the present application.

Fig. 2 is a schematic flow chart of a method for data transmission according to an embodiment of the present application.

Fig. 3 is a schematic diagram of time domain resources used by different interfaces according to an embodiment of the present application.

Fig. 4 is a schematic diagram of frame structures of different interfaces provided in an embodiment 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 method according to an embodiment of the present application.

Fig. 7 is a schematic diagram of another mapping manner of a reference signal according to an embodiment of the present application.

Fig. 8 is a schematic structural diagram of a communication device provided in an embodiment of the present application.

Detailed Description

The technical solution in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. It should be apparent that the described embodiments are only some of the embodiments of the present application, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without any creative effort, shall fall within the protection scope of the present application

It should be understood that the technical solutions of the embodiments of the present application may be applied to various communication systems, for example: a global System for Mobile communications (GSM) System, a Code Division Multiple Access (CDMA) System, a Wideband Code Division Multiple Access (WCDMA) System, a General Packet Radio Service (GPRS), a Long Term Evolution (LTE) System, a frequency Division Duplex (LTE FDD) System, a Time Division Duplex (LTE TDD) System, a Universal Mobile Telecommunications System (UMTS), a Worldwide Interoperability for Microwave Access (WiMAX) communication System, and a future fifth generation (5G) System or a New Radio (NR), etc., which are not limited to the embodiments. The method provided in this embodiment may also be applied to a communication system, such as a vehicle-to-vehicle communication technology (V2X), a long term evolution-based vehicle-to-vehicle communication technology (LTE-V), a vehicle-to-vehicle (V2V) communication system, a manual semi-automatic toll collection system (MTC), an internet of things (IoT), an LTE-to-machine (LTE-to-machine, LTE-M), a machine-to-machine (M2M), and the like.

A User Equipment (UE) in the embodiments of the present application may refer to a terminal device, an access terminal, a subscriber unit, a subscriber station, a mobile station, a remote terminal, a mobile device, a user terminal, a wireless communication device, a user agent, or a user equipment. The terminal device may also be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA), a handheld device with wireless communication function, a computing device or other processing device connected to a wireless modem, a vehicle-mounted device, a wearable device, a terminal device in a future 5G network or a terminal device in a future evolved Public Land Mobile Network (PLMN), and the like, which are not limited in this embodiment.

In this embodiment of the present application, the base station may be a Base Transceiver Station (BTS) in GSM or CDMA, a base station (NodeB, NB) in WCDMA, an evolved Node B (eNodeB) in LTE, a base station gbb in 5G, or other network equipment with a base station function, which is not limited in this application.

In the embodiment of the application, the user equipment, the relay equipment or the network equipment comprises 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 a memory (also referred to as a main memory). The operating system may be any one or more computer operating systems that implement business processing through processes (processes), such as a Linux operating system, a Unix operating system, an Android operating system, an iOS operating system, or a windows operating system. The application layer comprises applications such as a browser, an address list, word processing software, instant messaging software and the like. Furthermore, the embodiment of the present application does not particularly limit the specific structure of the execution main body of the method provided by the embodiment of the present application, as long as the communication can be performed according to the method provided by the embodiment of the present application by running the program recorded with the code of the method provided by the embodiment of the present application, for example, the execution main body of the method provided by the embodiment of the present application may be a terminal device or a network device, or a functional module capable of calling the program and executing the program in the terminal device or the network device.

Fig. 1 is a schematic view of a wireless multi-hop network applicable to the 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 a user equipment 104, wherein the base station 101 is a base station providing service to the user equipment 103, and the relay devices may be at different hop counts, in this application, a relay device whose upper node is the base station is referred to as a first-hop relay device (e.g., the relay device 102), and a relay device whose upper node is another relay device is referred to as a non-first-hop relay device (e.g., the relay device 103) may be a relay device whose upper node is the base station (e.g., the relay device 102).

It should be understood that fig. 1 is a schematic diagram illustrating a multi-hop network and various devices constituting the multi-hop network, and does not limit the embodiments of the present application, for example, the number of base stations, relay devices, and user equipment in fig. 1 does not limit the present application. The number of hops in the present application is for convenience of description and is not limited, and for example, a relay device in which an upper node is a base station may be a 0-hop relay device or a second-hop relay device.

Taking the example that the D2D multihop network in fig. 1 is combined with the LTE communication system, the relay device and the base station may communicate via a Uu interface, the relay device and the user equipment or the relay device and other relay devices may communicate via a PC5 interface, for example, the relay device 102 and the base station communicate via the Uu interface, and the relay device 102 and the user equipment 104 communicate via a PC5 interface.

When the relay device communicates with the base station through the Uu interface, taking the data channel as an example, both channel coding modes adopted by an uplink physical channel and a downlink physical channel of the Uu interface are turbo coding, a modulation mode of the uplink physical channel is single-carrier frequency-division multiple access (SC-FDM) waveform modulation, and a modulation mode of the downlink physical channel is Orthogonal Frequency Division Multiplexing (OFDM) waveform modulation. When the relay device communicates with the user equipment or other relay devices through the PC5 interface, the uplink physical channel and the downlink physical channel of the PC5 interface are both encoded by using turbo coding and are both modulated by using SC-FDM waveforms.

It should be understood that the downstream physical channel of the Uu interface and the physical channel of the PC5 interface for sidestream communication both use turbo coding, so that the user equipment that needs to access the network has turbo decoding capability, thereby increasing the complexity and cost of the user equipment, and being not suitable for power meter reading service. In addition, the downlink physical channel of the Uu interface and the physical channel of the PC5 interface for sidestream communication use different modulation waveforms, reference signals, mapping resources, and the like, so that the first relay device cannot multiplex the reception flow, increasing the complexity of processing data and the cost of the first relay device.

In view of the above existing problems, embodiments of the present application provide a method for data transmission.

Fig. 2 shows a schematic flow chart 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.

Optionally, the first device is a relay device, the second device is a parent node of the first device, and the second device may be a base station or another relay device.

Optionally, when the second device is a base station, the first indication information is used to indicate the first device to perform data transmission with the second device through the first interface.

Optionally, when the second device is another relay device, the first indication information is used to indicate the first device to perform data transmission with the second device through the first interface or the second interface.

Specifically, when the parent node of the relay device is a base station, the base station sends first indication information to the first device to indicate the first device to perform data transmission with the base station through a first interface; when the parent node of the relay device is 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. In other words, the first relay device and the base station may perform data transmission through the first interface, and the relay device or the relay device and the user equipment may perform data transmission through the first interface or the second interface.

S202, the first device sends second indication information to the third device.

Optionally, the first device is a relay device, and the third device may be a child node of the first device, for example, may be at least one other relay device or user equipment.

Optionally, the first device sends second indication information to the third device, where the second indication information is used to indicate, to the third device, that data transmission is performed with the first device through the first interface or the second interface. In other words, data transmission between the first device and the lower node of the first device may be performed through the first interface or the second interface.

It should be understood that, in the wireless communication process of the embodiment of the present application, to adapt to the processing capability of the relay device, the parent link and the sub-link of the relay device may flexibly select the interface type for data transmission, for example, the relay device and the base station may communicate via the first interface, and the relay device and other relay devices or the relay device and the user equipment may communicate via the first interface or the second interface. Meanwhile, the first interface and the second interface are set, so that at least one uplink physical channel of the second interface and a downlink physical channel of the first interface have the same modulation mode, the relay device can multiplex receiving processes of a parent link and a sub-link, and complexity and cost of the relay device are reduced.

It should also be appreciated that, in general, the base station has a different processing capability than the relay device or the user equipment, the base station has a stronger processing capability, and the relay device or the user equipment may have a relatively weaker processing capability. Therefore, for the base station and the relay device or the base station and the user equipment to communicate through the first interface, the first interface may satisfy: the uplink physical channel and the downlink physical channel adopt different modulation modes, that is, a pair of uplink and downlink physical channels with the same modulation mode does not exist in the uplink and downlink physical channels of the first interface.

In summary, in the embodiment of the present application, the downlink physical channel of the first interface and the uplink physical channel of the second interface use the same modulation method, and the uplink physical channel and the downlink physical channel of the first interface use different modulation methods.

For example, the downlink physical channel of the first interface and the uplink physical channel of the second interface use the same modulation scheme, where the downlink physical channel of the first interface may be a downlink physical channel carrying control information, for example, a Physical Downlink Control Channel (PDCCH) or a physical hybrid automatic repeat request channel (PHICH), or a downlink control channel (NPDCCH) in a narrow band internet of things (NB-IoT) system; the uplink physical channel of the second interface may be an uplink physical channel carrying control information, and may be, for example, an uplink physical control channel (PUCCH) or an uplink physical control channel (NPUCCH) in an NB-IoT system or an uplink physical control channel (IAB physical uplink control channel, IPUCCH) related to the second interface of the present application; alternatively, the downlink physical channel of the first interface and the uplink physical channel of the second interface may be a downlink Physical Downlink Shared Channel (PDSCH) and an uplink Physical Uplink Shared Channel (PUSCH), respectively. The uplink physical channel and the downlink physical channel related to the above scheme may also include other multiple types, which is not limited in this application.

For example, the uplink and downlink physical channels of the first interface use different debugging modes, for example, the uplink physical channel of the first interface may use SC-FDM waveform modulation, and the downlink channel uses OFDM waveform modulation. The uplink physical channel and the 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. In addition, the downlink physical channel of the first interface may also be a PHICH.

Optionally, the uplink control channel of the second interface and the downlink control channel of the first interface may adopt the same coding mode; the downlink control channel of the second interface may also be a PHICH, that is, the PUCCH of the second interface and the PHICH of the first interface adopt the same coding scheme.

Optionally, the uplink and downlink physical shared channels of the first interface respectively adopt different coding modes; or, the uplink and downlink physical control channels of the first interface respectively adopt different coding modes. For example, the uplink shared physical channel of the first interface may employ turbo coding, while the downlink shared physical channel may employ tail-biting convolutional coding.

Optionally, the physical resource for uplink transmission of the second interface is the same as the physical resource for downlink transmission of the first interface, and the physical resource may be a time domain resource and/or a frequency domain resource.

Optionally, the physical resources of the first interface used for uplink and downlink transmission are different, and the physical resources may be time domain resources and/or frequency domain resources.

Optionally, at least one uplink physical channel and at least one 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.

Optionally, the downlink reference signal of the first interface and the uplink reference signal of the second interface use the same base sequence and/or Resource Element (RE) mapping manner.

It should be understood that the uplink and downlink physical channels of the second interface may use the same modulation method and/or coding method, or the physical resources of the second interface used for uplink and downlink transmission are the same, that is, the modulation method of the uplink and downlink physical channels of the second interface is the same as the modulation method of the downlink physical channel of the first interface; and/or the coding mode of the uplink and downlink physical channel of the second interface is the same as that of the downlink physical channel of the first interface; and/or the physical resources used for uplink and downlink transmission of the second interface are the same as the physical resources used for downlink transmission of the first interface. The uplink and downlink physical channels of the second interface may be a PUSCH and a PDSCH, and the downlink physical channel of the first interface may be a PDSCH; or, the uplink and downlink physical channels of the second interface may be a PUCCH and a PDCCH, and the downlink physical channel of the first interface may be a PDCCH or a PHICH.

The following describes modulation schemes, coding schemes, reference signals, and the like that can be used by the first interface and the second interface in the present application.

As an example, when the first interface is a Uu interface, 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 (PBCH), PHICH. The channel coding method, the modulation method, and the reference signal adopted by different uplink physical channels or downlink physical channels of the first interface are respectively shown in table 1. The coding modes of the PDCCH, the PDSCH and the PBCH are tail-biting convolutional coding, the modulation mode is OFDM waveform modulation, and the reference signal is a Cell Reference Signal (CRS); the PUCCH adopts a repetition coding mode, SC-FDM waveform modulation and a demodulation reference signal (DMRS) mapping mode; and the PUSCH adopts a Turbo coding mode, SC-FDM waveform modulation and a DMRS mapping mode. The coding scheme, modulation waveform, and reference signal used for each physical channel are shown in table 1.

TABLE 1

It should be understood that the mapping manners of CRS and DMRS are different. As can be seen from the modulation mode, the coding mode and the reference signal of the uplink physical channel and the physical downlink channel of the Uu interface, for each uplink physical channel of the Uu interface, there is no downlink physical channel of the Uu interface, so that the two meet the requirement of the consistency of the coding mode, the modulation mode and the resource mapping.

Optionally, in order to satisfy that the uplink transmission resource of the second interface is the same as the downlink transmission resource of the first interface, a physical channel of the second interface may be designed. The channel coding scheme, the modulation scheme, and the reference signal used by different physical channels of the second interface are shown in table 2.

TABLE 2

It should be understood that the uplink shared channel (IPUSCH) in table 2 has the same essential function as the PUSCH, and is only for convenience of distinguishing the uplink shared channel of the interface designed in the embodiment of the present application. Similarly, an uplink control channel (IBA physical uplink shared channel, IPUSCH) has the same essential function as the PUCCH, and is only for convenience of distinguishing the uplink control channel of the interface designed in the embodiment of the present application.

As can be seen from tables 1 and 2, the PHICH of the first interface and the IPUCCH of the second interface both use an RM coding scheme, OFDM waveform modulation, and the reference signal is CRS, so that the PHICH of the first interface and the IPUCCH of the second interface have the same coding scheme, modulation scheme, and reference signal. In addition, the IPUSCH of the second interface and the PDSCHs of the first and second interfaces all use tail-biting convolutional coding, OFDM waveforms, and CRS reference signals, so the PDSCH of the first interface and the PDSCH of the second interface have the same coding scheme, modulation scheme, and reference signals. In other words, at least one downlink physical channel of the first interface and an uplink physical channel of the second interface adopt the same coding mode, modulation mode and reference signal.

Optionally, at least one downlink reference signal of the first interface, the uplink reference signal and the downlink reference signal of the second interface use the same base sequence and RE mapping manner. Specifically, when the number of antenna ports is the same, the same RE mapping method is adopted for the reference signal CRS of the first interface, the reference signal relay node specific reference signal (IRS) of the second interface, and the demodulation reference signal (integrated access and background modulation reference signal, IDMRS) of the second interface. The IDMRS and the DMRS have substantially the same function, and are only used to distinguish demodulation reference signals of the interface designed in the embodiment of the present application. The mapping manner of the CRS, IRS, or IDMRS single antenna port may be as shown in fig. 3. In addition, a demodulation reference signal (DMRS) mapping manner 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.

Alternatively, uplink transmission of the second interface may support only a single antenna port.

Optionally, the downlink physical channel of the first interface and the uplink physical channel of the second interface and the downlink physical channel use the same modulation and coding scheme (modulation and coding scheme) to end the mapping table. The downlink physical channel of the first interface may be a PDSCH or other downlink physical channels, and the uplink physical channel and the downlink physical channel of the second interface may be an IPUSCH, an IPDSCH, or other corresponding physical channels, which is not limited in this application.

Optionally, 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. For example, the base sequences of the reference signals CRS, IRS, and IDMRS are all formula 1:

wherein r is_l,nsComprises the following steps: l is the symbol number in a time slot, n_sNumbering the time slots, r_l,nsValues are taken for a base sequence mapped in a frame on a corresponding OFDM symbol of a corresponding slot.

m is an absolute force carrier index of a transmission reference signal carrier;

and c is a pseudo-random sequence.

In addition, the DMRS motif column is formula 2:

wherein,

is the number of subcarriers;

u is high-level parameter configuration;

alpha is a phase rotation value.

Optionally, the IPUSCH may use the same TBS table and scrambling code seed generation formula as the PDSCH; or the IPUCCH and the PHICH adopt the same modulation mode, the TBS table and the scrambling code seed generation formula; or any downlink physical channel of the first interface and the uplink physical channel of the second interface have the same CRS sequence formula or scrambling code seed generation formula.

It should be understood that, when the downlink physical channel of the first interface adopts a waveform modulation mode, the uplink physical channel of the second interface also adopts the same modulation mode, so that the first relay device can multiplex the receiving process, and the efficiency of data transmission is improved. And the uplink and downlink physical channels of the first interface can adopt different modulation modes to adapt to the processing capacities of the base station and the relay equipment respectively. In addition, the uplink and downlink physical channels of the second interface may also adopt the same modulation mode, for example, both the uplink physical channel and the downlink physical channel of the second interface adopt OFDM waveform modulation.

In addition, the uplink physical channel and the downlink physical channel of the second interface may both adopt the same coding mode, modulation mode, reference signal or other mapping resources, etc. as the downlink physical channel of the first interface. For example, both the uplink physical channel of the second interface and the downlink physical channel of the second interface adopt a tail biting convolutional coding mode; or, the uplink physical channel of the second interface and the downlink physical channel of the second interface both adopt OFDM waveform modulation and the like.

It should be understood that the resource for uplink transmission of the second interface and the resource for downlink transmission of the first interface may be the same uplink time domain resource of the second interface and the same downlink time domain resource of the first interface, or the same uplink frequency domain resource of the second interface and the same downlink frequency domain resource of the first interface, or both of them.

The specific description that the uplink transmission and the downlink transmission of the second interface are the same as the downlink transmission of the first interface is similar to the above-mentioned specific description that the uplink transmission and the downlink transmission of the second interface are the same as the downlink transmission of the first interface, and the specific description may be referred to above, and is not repeated here to avoid repetition.

The above-mentioned time domain resources are the same and the frequency domain resources are the same as specifically described below with reference to fig. 5 and 6.

Optionally, the uplink time domain resource of the second interface is the same as the downlink time domain resource of the first interface, and the method may include: the time for uplink transmission in each transmission time interval TTI of the second interface is the same as the time for downlink transmission in each TTI of the first interface, 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 time length of the uplink symbols in each TTI of the second interface is the same as the time length of the downlink symbols at the corresponding position in each TTI of the first interface.

As an example, the time for uplink transmission in each transmission time interval TTI of the second interface is the same as the time for downlink transmission in each TTI of the first interface, which is specifically described with reference to fig. 5 and 6. Fig. 5 is a schematic diagram of time-frequency resource transmission in a multi-hop network. The radio frame of the first interface (hereinafter referred to as a first radio frame) used by the base station for data transmission with the first relay device is different from the radio frame of the second interface (hereinafter referred to as a second radio frame) used by the first relay device for data transmission with the first device in frame structures, where the structures of the first radio frame and the second radio frame in this embodiment are respectively shown in fig. 6(a) and fig. 6 (b).

Fig. 6(a) shows a frame structure of the first wireless frame. In fig. 6(a), each radio frame with a length of 10 milliseconds (ms) of the first interface includes 5 subframes with a length of 2ms, where slots (slot) #0 and slot #1 are allocated for Downlink (DL) transmission, slots #3 and slot #4 are allocated for Uplink (UL) transmission, and a special slot #2 is located between a downlink transmission slot and an uplink transmission slot, where the structure of the special slot includes a downlink pilot slot (DwPTS), a guard slot GAP between uplink and downlink, and an uplink pilot slot (UpPTS).

Fig. 6(b) shows a frame structure of the second radio frame. For simplicity of description, only the difference between the radio frame of the second interface and the radio frame of the first interface is introduced. Unlike slot #4 for uplink transmission of the first radio frame, slot #4 for uplink transmission of the second interface is divided into a time length T_UL＝60T _sUpPTS and time length T of 4/3ms_GAP＝40T _sGAP of 2/3 ms.

It can be seen that, in the first radio frame, the slot #0 and the slot #1 are used for downlink transmission, the time length of the slot #0 and the slot #1 is 240Ts, and the time length of the special slot including the downlink pilot slot is 20Ts, so that it can be known that the time length used for uplink transmission in one TTI of the first interface is 240Ts +20Ts — 260 Ts. In a second radio frame, slot #3 and slot #4 are used for uplink transmission, where the time length of the slot #3 and slot #4 for uplink transmission is 240Ts-40 Ts-200 Ts, the time length of the uplink pilot slot in a special slot is 60Ts, and the time length of the uplink pilot slot in one TTI of the second interface is 200Ts +60 Ts-260 Ts. Therefore, the time for downlink transmission in one TTI of the first interface is the same as the time for uplink transmission in one TTI of the second interface.

Optionally, the step of that the uplink time domain resource of the second interface is the same as the downlink time domain resource of the first interface may further include: the uplink symbols in each TTI of the second interface have the same Cyclic Prefix (CP) time length as the downlink symbols at the corresponding position in each TTI of the first interface.

Optionally, the uplink frequency domain resources of the second interface are the same as the downlink frequency domain resources of the first interface, and may include at least one of the following: the number of the sub-carriers of the uplink resource block of the second interface is the same as that of the downlink resource block of the first interface, and the bandwidths of the sub-carriers of the uplink resource block and the sub-carriers of the corresponding positions of the downlink resource block are the same. The resource block may be a carrier or a physical resource block.

In addition, at least one uplink physical channel of the second interface is the same as one or more of a coding mode, a modulation mode, a reference signal, a mapping mode and the like of a downlink physical channel of the first interface.

Next, the first indication information and the second indication information will be specifically described.

Optionally, the first indication information and the second indication information may include reference information, where the reference information is information having correspondence with different interfaces, for example, a synchronization channel base sequence set, a period of a synchronization signal, a time-frequency position of the synchronization signal, an offset of the synchronization signal within a fixed time period, or a PBCH time-frequency position; alternatively, the first indication information and the second indication information may further include explicit indication information or implicit indication information, and the explicit indication information may directly indicate an interface used by the relay device or the user equipment in the first indication information, for example.

It should be understood that the base sequence sets, the periods of the synchronization signals, the time-frequency positions of the synchronization signals, the offsets of the synchronization signals within a fixed time period, or the PBCH time-frequency positions of the different interfaces are different. For convenience of understanding, the first interface is described as a Uu interface.

The base sequences used when the Secondary Synchronization Signal (SSS) is generated may be from different base sequence sets, and because each base sequence included in the base sequence sets of different interfaces is different, the user equipment may determine, according to the base sequence that generates the SSS, a type of a radio interface that the SSS corresponds to, and thus determine the radio interface that is used.

As one example, equations (1) through (4) generate equations for the SSS of the first interface:

equations (5) to (8) are SSS generation equations for the second interface:

wherein, SSS₁(n) SSS1 is the first ZC sequence used to form the SSS base sequence.

SSS ₂(n) is: SSS1 is the second ZC sequence used to form the SSS base sequence.

u ₁And u₂Comprises the following steps: for determining parameters of the base sequence.

It should be understood that the synchronization signal base sequences of the first interface and the second interface are different from each other, and the user equipment or the second relay equipment can know the radio interface to be used according to the blind detection synchronization signal.

Optionally, the first indication information and the second indication information may also be broadcast messages, system messages, or Radio Resource Control (RRC) messages.

As an example, when the user equipment or the second relay equipment accesses the network by searching for the synchronization signal, the first relay equipment or the base station may carry indication information in an RRC message to indicate an interface used by the user equipment or the second relay equipment.

Optionally, the RRC message may be one or more of an RRC connection setup message, an RRC reestablishment message, an RRC reply message, an RRC reconfiguration message, or the like, for example.

Optionally, the indication information included in the first indication information and the second indication information may be an implicit indication, for example, the indication information indicates a hop count of the first relay device or the first device, and the first device determines whether itself is a first hop node according to the hop count, and if so, may adopt a first interface; if the node is not the first hop node, the second interface may be used.

A protocol or system may specify a counting principle for the number of hops in which a relay device is located in a multihop system. For example, the protocol or system may specify that the base station is the 0 th hop, the first-stage relay node accessing the base station is the 1 st hop, and then the hop count of the relay node of each stage is sequentially increased by 1.

In addition, the protocol or system may also provide that the first-stage relay device accessing the base station is the 0 th hop, and then the hop count of each stage of relay device is sequentially increased by 1.

The above is merely for illustration, and the principle of counting the number of hops in which the relay device is located in the multi-hop system in the embodiment of the present application is not limited.

Optionally, 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.

Optionally, since the base sequence sets, the periods of the synchronization signals, the time-frequency positions of the synchronization signals, the offsets of the synchronization signals in a fixed time period, or the PBCH time-frequency positions corresponding to different interfaces are different, the first relay device may determine the used interface according to the first indication information, or according to the above information included in the second indication information, the other relay devices, or the user equipment.

As an example, the relay device or the user equipment may know the type of its 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 may obtain, according to a base sequence constituting a synchronization channel, which base sequence set is selected from among base sequence sets of which radio interfaces, so as to determine a type of a radio interface to be used.

Optionally, when the relay device or the user equipment accesses the network by searching for the synchronization signal, it may determine, according to the base sequence of the synchronization signal, which interface the base sequence set in which the base sequence is located belongs to, and further determine to use the interface; alternatively, the relay device or the user equipment may determine the type of radio interface used according to the time-frequency location of the PBCH.

Optionally, the relay device and the user equipment determine the used interface according to indication information carried in the first indication information and the second indication information, respectively, where the indication information may be explicit indication information or implicit indication information. For example, the relay device or the user equipment may determine the interface to be used according to the indication information carried in the received broadcast message or system message; or the relay equipment or the user equipment determines the used interface according to the indication information in the received RRC message.

Optionally, the relay device or the user equipment may also determine the used interface according to the hop count information sent by the upper node. For example, when the relay device or the user equipment determines that the relay device or the user equipment is a first-hop node according to a broadcast message or a system message of a superior node, it determines to use the first interface; and when the relay equipment or the user equipment determines that the relay equipment or the user equipment is not the first hop node, determining to use the second interface.

In the embodiment, the superior node notifies the subordinate node of the used wireless interface, so that the subordinate node can effectively complete transmission in the multi-hop network, and meanwhile, the public resource overhead of the multi-hop network is effectively saved.

In the embodiment, different interfaces are used for data transmission among different network element nodes in the multi-hop network, so that the first relay device can multiplex the receiving flows of the parent link and the sub-link, the complexity of a receiving module is minimized, and the cost of the device is reduced. In addition, the first interface or the second interface is used for data transmission between the relay equipment and between the relay equipment and the user equipment, and the first interface and the second interface are set, so that the user equipment can multiplex the receiving flows of the first interface and the second interface, and the complexity of data processing and the equipment cost are reduced.

When the base station performs data transmission with the first relay device through the first interface, and the first relay device performs data transmission with the second relay device or with the user equipment through the second interface, for the first relay device, the transmission or reception time of the first relay device to the parent link (transmission link between the base station and the first relay device) and the child link (transmission link between the first relay device and the second relay device or between the first relay device and the user equipment) needs to be aligned, so as to minimize cross interference, and extend the time length of the guard interval, so as to ensure normal transmission and transceiving switching due to filter tailing. This effect requires the timing advance parameter T to be adjusted by the first relay device_AAnd (5) realizing.

Fig. 7 shows a schematic diagram of a timing advance.

Due to the fact that transmission delay exists between the base station and the first relay device, the time when the base station receives the uplink information sent by the first relay device is delayed. In a multi-hop network communication system, a transmission delay also exists in a sub-link between a first relay device and a second relay device or between the first relay device and a user equipment. The sending or receiving time of the parent link and the child link of the first relay device needs to be aligned, specifically, the time of downlink information sent by the first relay device to the second relay device or the user equipment needs to be aligned with the time of uplink information sent by the first relay device to the base station; 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 following description will be given taking as an example the transmission time alignment of the first relay device between the parent link and the child link.

As an example, the frame structure of the radio frame of the first interface is shown in fig. 6(a), and the frame structure of the radio frame of the second interface is shown in fig. 6 (b).

It should be understood that the timing advance parameter is adjusted between the first relay device and the base station to enable the time of the uplink information sent by the first relay device to the base station to be aligned.

As an example, the timing advance scheme of the first interface is:

T＝[(N _TA+N _TA-offset)·Ts]s

wherein, T is the time advance needed by the transmission through the first interface;

N _TAthe time advance is set for overcoming the time delay caused by physical distance;

N _TA-offseta time advance set for a guard time slot GAP based on a radio frame;

optionally, when the radio frame of the first interface is the radio frame of the first interface shown in fig. 3, in order to ensure a necessary guard interval for switching between uplink transmission and downlink transmission, a subframe UL of the uplink transmission may be advanced by 20Ts (a duration of a GAP is 40Ts), so that there is a guard interval with a time length of 20Ts between the UL and a DL of a next TTI, at this time, N of the first interface is a guard interval with a time length of 20Ts_TA-offset＝20Ts。

It should be understood that there is a transmission delay between the base station and the first relay device, and there is also a transmission delay between the first relay device and the second relay device or between the first relay device and the user equipment, so the time length of the GAP used for adjusting the time advance in the radio frame of the second interface can be flexibly set according to the required time advance. For example, when setting the protection slot GAP of the second interface, both the time advance in the parent link and the time advance in the child link of the first relay device need to be taken into consideration, in other words, the setting requirement of the protection slot GAP in the frame structure of the second interface can satisfy the sum of the time advances required by the parent link and the child link.

Optionally, 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 N_TA-offsetSo that the interval between adjacent radio frames of the second interface is also T.

As an example, when the uplink subframe in the radio frame of the first interface is advanced by 20Ts, the interval between the radio frame and the next radio frame is 20Ts, so that the preset N required by the second interface is set_TA-offsetThe interval between adjacent radio frames can be also 20Ts, specifically, since the interval between adjacent radio frames of the second interface is 40Ts, the uplink subframe of the previous radio frame can be delayed by 20Ts, at this time, N_TA-offset-20Ts, wherein "-" denotes time delay.

Alternatively, for the second interface, the same timing advance scheme as for the first interface described above may be employed, but N_TA-offsetDifferent values may be used. For example, the ith-hop relay node should satisfy the following relationship:

2N _TA-offset+N _TA，i-1+N _TA，i＝T _RTT，i

wherein N is_TA，i-1The time advance of the time delay caused by the transmission distance for the i-1 hop relay equipment;

N _TA，ithe time advance of the time delay caused by the transmission distance for the i-1 hop relay equipment;

T _RTT，iis the signal round trip time between the ith hop device and its parent node;

alternatively, due to N_TA，iMust not be negative, N_TA-offsetThe values of the first interface cannot be multiplexed.

The present embodiment adopts different N for the first interface and the second interface_TA-offsetAnd the value ensures that the sending or receiving time of the parent link and the child link of the first relay device can be aligned.

It should be understood that the above description is only given by taking the case where the frame structures of the radio frames of the first interface and the second interface are shown in fig. 3 as an example, but the present application is not limited thereto.

Fig. 8 shows a schematic configuration diagram of a communication apparatus provided in the present application. The communication apparatus shown in fig. 8 may be the relay device mentioned above. The communications apparatus 800 can be used to implement the steps performed by the relay device above. The communication apparatus 800 includes a receiving unit 810 and a transmitting unit 820.

The receiving unit 810 is configured to receive, at a first device (that is, a relay device), a first indication message sent by a second device, where the first indication message is used to indicate that the first device performs data transmission with the second device through a first interface or a second interface, and when the second device is a base station, the first indication message indicates that the first device performs 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 indicate that the third device performs 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 method, and the uplink physical channel and the downlink physical channel of the first interface use different modulation methods.

It should be understood that in the present embodiment, "B corresponding to a" means that B is associated with a, from which B can be determined. It should also be understood that determining B from a does not mean determining B from a alone, but may be determined from a and/or other information.

It should also be understood that the term "and/or" herein is merely one type of association that describes an associated object, meaning that three relationships may exist, e.g., a and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.

Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.

It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.

In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.

The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application or portions thereof that substantially contribute to the prior art may be embodied in the form of a software product stored in a storage medium and including instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.

The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

A method of data transmission, comprising:

a first device receives a first indication message sent by a second device, where the first indication message is used to indicate that the first device performs data transmission with the second device through a first interface or a second interface, and when the second device is a base station, the first indication message indicates that the first device performs data transmission with the second device through the first interface;

the first device sends a second indication message to a third device, where the second indication message is used to indicate that the third device performs 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 method, and the uplink physical channel and the downlink physical channel of the first interface use different modulation methods.
The method of claim 1, further comprising:

the uplink physical shared channel of the second interface and the downlink physical shared channel of the first interface adopt the same coding mode; and/or

And the uplink physical channel of the second interface for bearing the control information and the downlink physical channel of the first interface for bearing the control information adopt the same coding mode.
The method according to claim 1 or 2, characterized in that the method further comprises:

the uplink physical shared channel of the second interface and the downlink physical shared channel of the second interface adopt the same coding mode; and/or

And the uplink physical channel of the second interface for bearing the control information and the downlink physical channel of the second interface for bearing the control information adopt the same coding mode.
The method according to any one of claims 1-3, further comprising:

the physical resource of the first interface for downlink transmission is the same as the physical resource of the second interface for downlink transmission; and/or

And the physical resource of the second interface for uplink transmission is the same as the physical resource of the second interface for downlink transmission.
The method of claim 4, wherein the physical resources comprise:

time domain resources and/or frequency domain resources.
The method of claim 5, wherein the time domain resources comprise:

a time for transmission in a per transmission time interval, TTI, and a number of symbols in the per TTI and a symbol time length in the per TTI.
The method of claim 6, wherein a symbol time length comprises a Cyclic Prefix (CP) time length of the symbol.
The method according to any of claims 4-7, wherein the frequency domain resources comprise:

the number of subcarriers of a resource block and the bandwidth of the subcarriers at a specific position of the resource block, wherein the resource block comprises a carrier or a physical resource block.
The method according to any of claims 1-8, wherein the first or second indication message comprises at least one of:

a synchronization channel base sequence, a period of a synchronization signal, an offset of the synchronization signal within a fixed time period, a physical broadcast channel PBCH time-frequency position, a broadcast message, a system message or a radio resource control RRC message.
The method according to any one of claims 1-9, further comprising:

and at least one downlink reference signal of the first interface and an uplink reference signal of the second interface adopt the same base sequence and/or resource block RE mapping mode.
The method according to any one of claims 1-10, further comprising:

at least one uplink physical channel and at least one downlink physical channel of the second interface and the downlink physical channel of the first interface adopt the same order mapping table and/or the same Transport Block Size (TBS) table.
The method according to any of claims 1-11, wherein the first interface and the second interface employ different time advance offsets, N_TA-offset。
The method of claim 12, wherein the second interface employs a time advance offset N when a preset interval between adjacent radio frames of the first interface is T_TA-offsetAnd enabling the preset interval between the adjacent wireless frames of the second interface to be T.
A communication device, comprising:

a receiving unit, configured to receive a first indication message sent by a second device, where the first indication message is used to indicate that the first device performs data transmission with the second device through a first interface or a second interface, and where the first indication message indicates that the first device performs data transmission with the second device through the first interface when the second device is a base station;

a sending unit, configured to send a second indication message to a third device, where the second indication message is used to indicate that the third device performs 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 method, and the uplink physical channel and the downlink physical channel of the first interface use different modulation methods.
The communication device according to claim 14, wherein the uplink physical shared channel of the second interface and the downlink physical shared channel of the first interface use the same coding scheme; and/or

And the uplink physical channel of the second interface for bearing the control information and the downlink physical channel of the first interface for bearing the control information adopt the same coding mode.
The communication device according to claim 14, wherein the uplink physical shared channel of the second interface and the downlink physical shared channel of the second interface use the same coding scheme; and/or

And the uplink physical channel of the second interface for bearing the control information and the downlink physical channel of the second interface for bearing the control information adopt the same coding mode.
The communications device according to any of claims 14-16, wherein the physical resources for downlink transmission of the first interface and the physical resources for downlink transmission of the second interface are the same; and/or

And the physical resource of the second interface for uplink transmission is the same as the physical resource of the second interface for downlink transmission.
The communications device of claim 17, wherein the physical resources comprise:

time domain resources and/or frequency domain resources.
The communications device of claim 18, wherein the time domain resources comprise:

a time for transmission in a per transmission time interval, TTI, and a number of symbols in the per TTI and a symbol time length in the per TTI.
The communications device of claim 19, wherein said symbol time length comprises a Cyclic Prefix (CP) time length of said symbol.
The communications device of any one of claims 18-20, wherein the frequency domain resources comprise:

the number of subcarriers of a resource block and the bandwidth of the subcarriers at a specific position of the resource block, wherein the resource block comprises a carrier or a physical resource block.
The communication device of any of claims 14-21, wherein the first or second indication message comprises at least one of:

a synchronization channel base sequence, a period of a synchronization signal, an offset of the synchronization signal within a fixed time period, a physical broadcast channel PBCH time-frequency position, a broadcast message, a system message or a radio resource control RRC message.
The communication device of any one of claims 14-22, wherein the method further comprises:

and at least one downlink reference signal of the first interface and an uplink reference signal of the second interface adopt the same base sequence and/or resource block RE mapping mode.
The communication device of any one of claims 14-23, wherein the method further comprises:

at least one uplink physical channel and at least one downlink physical channel of the second interface and the downlink physical channel of the first interface adopt the same order mapping table and/or the same Transport Block Size (TBS) table.
The communications device of any one of claims 14-24, wherein the first interface and the second interface employ different time advance offsets N_TA-offset。
The communications device of claim 25, wherein the second interface employs a time advance offset N when a preset interval between adjacent radio frames of the first interface is T_TA-offsetMaking a preset interval between adjacent radio frames of the second interfaceThe septum is also T.