CN108023696B

CN108023696B - Method and apparatus for wireless communication

Info

Publication number: CN108023696B
Application number: CN201610959058.8A
Authority: CN
Inventors: 吴作敏; 马莎
Original assignee: Huawei Technologies Co Ltd
Current assignee: XFusion Digital Technologies Co Ltd
Priority date: 2016-11-03
Filing date: 2016-11-03
Publication date: 2020-06-02
Anticipated expiration: 2036-11-03
Also published as: WO2018082677A1; CN108023696A

Abstract

A method and apparatus of wireless communication are provided, the method comprising: a first terminal device determines a downlink subframe format, wherein the downlink subframe format is a subframe format used when downlink transmission is carried out between the first terminal device and a network device; the first terminal equipment receives a first signal sent by the second terminal equipment according to the downlink subframe format, and the subframe format corresponding to the first signal is the downlink subframe format, so that the burden of the terminal equipment can be reduced, and the performance of wireless communication can be improved.

Description

Method and apparatus for wireless communication

Technical Field

The present embodiments relate to the field of communications, and more particularly, to a method and apparatus for wireless communication.

Background

At present, an inter-device communication technology is known, when two terminal devices need to transmit data, one terminal device needs to send request information for requesting to establish an inter-device communication connection to the other terminal device, and the format of the request information is a specific format specified by the inter-device communication technology, so that the terminal devices can recognize the communication connection to be established as the inter-device communication connection according to the specific format.

Therefore, the related art inter-device communication technique needs to be based on transmission of the request information having a specific format, and the transmission of the request information (e.g., generation and identification processes) increases the processing load of the terminal device, affecting the performance of wireless communication.

Disclosure of Invention

The embodiment of the invention provides a wireless communication method and a wireless communication device, which can reduce the burden of terminal equipment and improve the performance of wireless communication.

In a first aspect, a method of wireless communication is provided, the method comprising: a first terminal device determines a downlink subframe format, wherein the downlink subframe format is a subframe format used when downlink transmission is carried out between the first terminal device and a network device; and the first terminal equipment receives a first signal sent by second terminal equipment according to the downlink subframe format, wherein the subframe format corresponding to the first signal is the downlink subframe format.

The sending terminal equipment sends the signal for bearing the information required to be sent to the receiving terminal equipment by adopting the downlink subframe format used by downlink transmission, and the receiving terminal equipment can receive the information from the sending terminal equipment according to the downlink subframe format used during downlink transmission, so that the inter-equipment communication is completed.

With reference to the first aspect, in a first implementation manner of the first aspect, the downlink subframe format includes a first downlink subframe format, where the first downlink subframe format is a subframe format of a downlink reference signal sent by the network device to the first terminal device, the first signal includes a first reference signal, and a subframe format corresponding to the first reference signal is the first downlink subframe format; and the first terminal equipment receives a first signal sent by second terminal equipment according to the downlink subframe format, and the method comprises the following steps: the first terminal equipment receives the first reference signal according to the first downlink subframe format; the method further comprises the following steps: and the first terminal equipment receives the first control channel and/or the first data channel sent by the second terminal equipment according to the first reference signal.

The reference signal which needs to be sent to the receiving terminal equipment is sent by the sending terminal equipment according to the subframe format of the downlink reference signal, so that the receiving terminal equipment can receive the reference signal from the sending terminal equipment according to the downlink subframe format used during downlink reference signal transmission, the transmission process of the reference signal between the sending terminal equipment and the receiving terminal equipment is completed, further, the subsequent communication process can be completed according to the reference signal, therefore, the communication scheme of the network equipment and the terminal equipment in the prior art can be compatible to complete the communication process between the equipment, and the universality and the practicability of the wireless communication method in the embodiment of the invention are improved.

With reference to the first aspect and the foregoing implementation manner, in a second implementation manner of the first aspect, the first reference signal is a reference signal generated according to any one of a first cell identifier, a second cell identifier, or a third cell identifier, where the first cell identifier is a virtual cell identifier of the first terminal device, the second cell identifier is a virtual cell identifier allocated by the first terminal device for the second terminal device, and the third cell identifier is a cell identifier of a cell in which the first terminal device and the second terminal device are located together.

By enabling the sending terminal device to generate the reference signal based on the specified virtual cell identifier, the receiving terminal device can identify the identity of the sending terminal device according to the specified virtual cell identifier, and therefore the communication safety can be improved.

With reference to the first aspect and the foregoing implementation manner, in a third implementation manner of the first aspect, the downlink subframe format includes a second downlink subframe format, where the second downlink subframe format is a subframe format of a downlink control channel sent by the network device to the first terminal device, the first signal includes a first control channel, and a subframe format corresponding to the first control channel is the second downlink subframe format; and the first terminal equipment receives a first signal sent by second terminal equipment according to the downlink subframe format, and the method comprises the following steps: the first terminal equipment receives the first control channel according to the second downlink subframe format; the method further comprises the following steps: and the first terminal equipment receives a first data channel sent by the second terminal equipment according to the first control channel.

The control channel required to be sent to the receiving terminal equipment is sent by the sending terminal equipment according to the subframe format of the downlink control channel, so that the receiving terminal equipment can receive the control channel from the sending terminal equipment according to the downlink subframe format used during downlink control channel transmission, the transmission process of the control channel between the sending terminal equipment and the receiving terminal equipment is completed, further, the subsequent communication process can be completed according to the control channel, therefore, the communication process between the equipment can be completed by utilizing the communication technology of the existing network equipment and terminal equipment, and the universality and the practicability of the wireless communication method of the embodiment of the invention are improved.

With reference to the first aspect and the foregoing implementation manner, in a fourth implementation manner of the first aspect, the second downlink subframe format includes a subframe format of any one control channel of a physical downlink control channel PDCCH, an enhanced physical downlink control channel EPDCCH, a machine type communication physical downlink control channel MPDCCH, and a short transmission time interval physical downlink control channel SPDCCH.

With reference to the first aspect and the foregoing implementation manner, in a fifth implementation manner of the first aspect, the scrambling identifier RNTI carried by the first control channel is a first scrambling identifier or a second scrambling identifier, where the first scrambling identifier is a scrambling identifier of the first terminal device, and the second scrambling identifier is a scrambling identifier allocated by the first terminal device to the second terminal device.

The terminal equipment at the sending end carries the specified scrambling code identification in the control channel, so that the terminal equipment at the receiving end can identify the identity of the terminal equipment at the sending end according to the specified scrambling code identification, and the communication safety can be improved.

With reference to the first aspect and the foregoing implementation manner, in a sixth implementation manner of the first aspect, the downlink subframe format includes a third downlink subframe format, where the third downlink subframe format is a subframe format of a downlink data channel sent by the network device to the first terminal device, the first signal includes a first data channel, and a subframe format corresponding to the first data channel is the third downlink subframe format; and the first terminal equipment receives a first signal sent by second terminal equipment according to the downlink subframe format, and the method comprises the following steps: and the first terminal equipment receives the first data channel according to the third downlink subframe format.

The data channel which needs to be sent to the receiving terminal equipment is sent by the sending terminal equipment according to the subframe format of the downlink data channel, so that the receiving terminal equipment can receive the data channel from the sending terminal equipment according to the downlink subframe format used during downlink data channel transmission, the transmission process of the data channel between the sending terminal equipment and the receiving terminal equipment is completed, further, data transmission based on the data channel can be realized, the communication process between the equipment can be completed by utilizing the communication technology of the existing network equipment and terminal equipment, and the universality and the practicability of the wireless communication method of the embodiment of the invention are improved.

With reference to the first aspect and the foregoing implementation manner of the first aspect, in a seventh implementation manner of the first aspect, the method further includes: the first terminal device sends the first data carried in the first data channel to the network device.

In a second aspect, a method of wireless communication is provided, the method comprising: the second terminal equipment determines a downlink subframe format, wherein the downlink subframe format is a subframe format used when downlink transmission is carried out between the first terminal equipment and the network equipment; and the second terminal equipment sends a first signal to the first terminal equipment according to the downlink subframe format, wherein the subframe format corresponding to the first signal is the downlink subframe format.

With reference to the second aspect, in a first implementation manner of the second aspect, the sending, by the second terminal device, the first signal to the first terminal device according to the downlink subframe format includes: and the second terminal equipment sends a first reference signal to the first terminal according to the first downlink subframe format, wherein the subframe format corresponding to the first reference signal is the first downlink subframe format.

With reference to the second aspect and the foregoing implementation manner of the second aspect, in a second implementation manner of the second aspect, the method further includes: the second terminal device generates the first reference signal according to the first downlink subframe format and any one of a first cell identifier, a second cell identifier, or a third cell identifier, where the first cell identifier is a virtual cell identifier of the first terminal device, the second cell identifier is a virtual cell identifier allocated by the first terminal device to the second terminal device, and the third cell identifier is a cell identifier of a cell in which the first terminal device and the second terminal device are located together.

With reference to the second aspect and the foregoing implementation manner, in a third implementation manner of the second aspect, the sending, by the second terminal device, the first signal to the first terminal device according to the downlink subframe format includes: and the second terminal equipment sends a first control channel to the first terminal according to a second downlink subframe format, wherein the subframe format corresponding to the first control channel is the second downlink subframe format.

With reference to the second aspect and the foregoing implementation manner, in a fourth implementation manner of the second aspect, the second downlink subframe format includes a subframe format of any one control channel of a physical downlink control channel PDCCH, an enhanced physical downlink control channel EPDCCH, a machine type communication physical downlink control channel MPDCCH, and a short transmission time interval physical downlink control channel SPDCCH.

With reference to the second aspect and the foregoing implementation manner, in a fifth implementation manner of the second aspect, the scrambling code identifier RNTI carried by the first control channel is a first scrambling code identifier or a second scrambling code identifier, where the first scrambling code identifier is a scrambling code identifier of the first terminal device, and the second scrambling code identifier is a scrambling code identifier allocated by the first terminal device to the second terminal device.

With reference to the second aspect and the foregoing implementation manner, in a sixth implementation manner of the second aspect, the sending, by the second terminal device, the first signal to the first terminal device according to the downlink subframe format includes: and the second terminal equipment sends a first data channel to the first terminal equipment according to a third downlink subframe format, wherein the subframe format corresponding to the first data channel is the third downlink subframe format.

In another implementation, with reference to the above aspects and various implementations of aspects, the first signal is transmitted through an unlicensed time-frequency resource.

In a third aspect, a method of wireless communication is provided, the method comprising: a first terminal device determines a first time period, wherein the first time period belongs to a first time range, the starting time of the first time range is the ending time of a first downlink transmission, the duration of the first time range is a preset value, the first downlink transmission belongs to downlink transmission performed in a cell to which the first terminal device and a second terminal device belong, and the first downlink transmission is downlink transmission performed at the current time in the downlink transmission, or the first downlink transmission is first downlink transmission performed after the current time in the downlink transmission; the first terminal device receives transmission request information sent by the second terminal device in the first period, wherein the transmission request information is used for indicating that the second terminal device requests to send data to the first terminal device; and the first terminal equipment receives second data sent by the second terminal equipment according to the transmission request information.

By enabling the sending terminal equipment and the receiving terminal equipment to transmit the request information within the specified time length range after the downlink transmission is finished and carrying out equipment-to-equipment communication with the receiving terminal equipment based on the request information, the receiving terminal equipment can be enabled not to need to detect the request information in real time, and the processing burden of the receiving terminal equipment can be reduced.

With reference to the third aspect, in a first implementation manner of the third aspect, the end time of the first downlink Transmission is an end time of signal Transmission in a last downlink subframe in a downlink Burst Transmission DL Transmission Burst to which the first downlink Transmission belongs, and a time interval is provided between the end time of the first downlink Transmission and a subframe end time of the last downlink subframe.

With reference to the third aspect and the foregoing implementation manner of the third aspect, in a second implementation manner of the third aspect, the method further includes: the first terminal device sends the second data to the network device.

In a fourth aspect, a method of wireless communication is provided, the method comprising: the second terminal device determines a first time period, the first time period belongs to a first time range, the starting time of the first time range is the ending time of first downlink transmission, the duration of the first time range is a preset value, the first downlink transmission belongs to downlink transmission performed in a cell to which the first terminal device and the second terminal device belong, and the first downlink transmission is downlink transmission performed at the current time in the downlink transmission, or the first downlink transmission is first downlink transmission performed after the current time in the downlink transmission; the second terminal device sends transmission request information to the first terminal device in the first period, wherein the transmission request information is used for indicating that the second terminal device requests to send data to the first terminal device; the second terminal device sends second data to the first terminal device.

With reference to the fourth aspect, in a first implementation manner of the fourth aspect, the ending time of the first downlink Transmission is an ending time of signal Transmission in a last downlink subframe in a downlink Burst Transmission DL Transmission Burst to which the first downlink Transmission belongs, and a time interval is provided between the ending time of the first downlink Transmission and a subframe ending time of the last downlink subframe.

In a fifth aspect, there is provided an apparatus for wireless communication, configured to perform the method of the first aspect and any possible implementation manner of the first aspect, or for performing the method of the second aspect and any of its possible implementations, or for performing the method of the third aspect and any of its possible implementations, or for performing the method of any one of the possible implementations of the fourth aspect and the fourth aspect, in particular, the apparatus of wireless communication may comprise means for performing the method of the first aspect and any possible implementation manner of the first aspect, or means for performing the method of the second aspect and any possible implementation of the second aspect, or means for performing the method of any possible implementation of the third aspect, or means for performing the method of any possible implementation of the fourth aspect and the fourth aspect.

In a sixth aspect, there is provided a wireless communication device, comprising a memory for storing a computer program and a processor for calling up and running the computer program from the memory, so that the wireless communication device performs the method of the first aspect and any one of the possible implementations of the first aspect, or performs the method of the second aspect and any one of the possible implementations of the second aspect, or performs the method of the third aspect and any one of the possible implementations of the third aspect, or performs the method of the fourth aspect and any one of the possible implementations of the fourth aspect.

In a seventh aspect, a computer program product is provided, the computer program product comprising: computer program code which, when run by a receiving unit, a processing unit, a transmitting unit or a receiver, a processor, a transmitter of a terminal device, causes the terminal device to perform the method of the first to fourth aspect or any of the possible implementations of the first to fourth aspects.

In an eighth aspect, a computer-readable storage medium is provided, which stores a program that causes a user equipment to execute the method of the first to fourth aspects or any possible implementation manner of the first to fourth aspects.

In another implementation manner, with reference to the above aspects and various implementation manners of the aspects, the first terminal device is a wearable device, and the second terminal device is a user device.

Drawings

Fig. 1 is a schematic architecture diagram of a communication system to which the method and apparatus for wireless communication of embodiments of the present invention are applicable.

Fig. 2 is a schematic interaction diagram of an example of a method of wireless communication according to an embodiment of the present invention.

Fig. 3 is a schematic interaction diagram of another example of a wireless communication method according to an embodiment of the present invention.

Fig. 4 is a schematic diagram illustrating an example of the position of the gap period according to the embodiment of the present invention.

Fig. 5 is a schematic block diagram of an example of a device for wireless communication according to an embodiment of the present invention.

Fig. 6 is a schematic block diagram of another example of a wireless communication apparatus according to an embodiment of the present invention.

Fig. 7 is a schematic block diagram of still another example of an apparatus for wireless communication according to an embodiment of the present invention.

Fig. 8 is a schematic block diagram of still another example of an apparatus for wireless communication according to an embodiment of the present invention.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

As used in this specification, the terms "component," "module," "system," and the like are intended to refer to a computer-related entity, either hardware, firmware, a combination of hardware and software, or software in execution. For example, a component may be, but is not limited to being, a process running on a processor, an object, an executable, a thread of execution, a program, and/or a computer. By way of illustration, both an application running on a computing device and the computing device can be a component. One or more components can reside within a process and/or thread of execution and a component can be localized on one computer and/or distributed between 2 or more computers. In addition, these components can execute from various computer readable media having various data structures stored thereon. The components may communicate by way of local and/or remote processes such as in accordance with a signal having one or more data packets (e.g., data from two components interacting with another component in a local system, distributed system, and/or across a network such as the internet with other systems by way of the signal).

It should be understood that embodiments of the present invention may be applied to various communication systems, such as: 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, an Advanced Long Term Evolution (LTE-a) System, a Universal Mobile Telecommunications System (UMTS) System, or a next-generation communication System, etc.

Generally, conventional Communication systems support a limited number of connections and are easy to implement, however, with the development of Communication technology, mobile Communication systems will support not only conventional Communication but also, for example, Device-to-Device (D2D) Communication, Machine-to-Machine (M2M) Communication, Machine Type Communication (MTC) and Vehicle-to-Vehicle (V2V) Communication.

The embodiments of the present invention have been described in connection with terminal devices. A terminal device may also be referred to as a User Equipment (UE), 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 be a Station (ST) in a Wireless Local Area Network (WLAN), and may be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA) device, 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, and a next-generation communication system, such as a terminal device in a fifth-generation communication (5G) Network or a terminal device in a future-evolution Public Land Mobile Network (PLMN) Network, and the like.

By way of example, and not limitation, in embodiments of the present invention, the terminal device may also be a wearable device. Wearable equipment can also be called wearable intelligent equipment, is the general term of applying wearable technique to carry out intelligent design, develop the equipment that can dress to daily wearing, like glasses, gloves, wrist-watch, dress and shoes etc.. A wearable device is a portable device that is worn directly on the body or integrated into the clothing or accessories of the user. The wearable device is not only a hardware device, but also realizes powerful functions through software support, data interaction and cloud interaction. The generalized wearable smart device includes full functionality, large size, and can implement full or partial functionality without relying on a smart phone, such as: smart watches or smart glasses and the like, and only focus on a certain type of application functions, and need to be used in cooperation with other devices such as smart phones, such as various smart bracelets for physical sign monitoring, smart jewelry and the like.

Furthermore, various embodiments of the present invention are described in connection with a network device. The network device may be a device such as a network device for communicating with a mobile device, and the network device may be an ACCESS POINT (AP) in a WLAN, a Base Transceiver Station (BTS) in GSM or CDMA, a Base Station (NodeB) in WCDMA, an evolved Node B (eNB) in LTE, a relay Station or an ACCESS POINT, or a network device in a vehicle-mounted device, a wearable device, a future 5G network, or a network device in a future evolved PLMN network.

In addition, the embodiments of the present invention are described in conjunction with a cell, where the cell may be a cell corresponding to a network device (for example, a base station), and the cell may belong to a macro base station or a base station corresponding to a small cell (small cell), where the small cell may include: urban cells (Metro cells), Micro cells (Micro cells), Pico cells (Pico cells), Femto cells (Femto cells), and the like, and the small cells have the characteristics of small coverage area and low transmission power, and are suitable for providing high-rate data transmission services.

In addition, multiple cells can simultaneously work at the same frequency on the carrier in the LTE system, and under some special scenes, the concepts of the carrier and the cells in the LTE system can also be considered to be equivalent. For example, in a Carrier Aggregation (CA) scenario, when configuring a secondary carrier for a UE, the secondary carrier may simultaneously carry a carrier index of the secondary carrier and a Cell identity (Cell identity, Cell ID) of a secondary Cell operating on the secondary carrier, and in this case, it may be considered that the concepts of the carrier and the Cell are equivalent, for example, it is equivalent that the UE accesses one carrier and one Cell.

The method and the device provided by the embodiment of the invention can be applied to terminal equipment or network equipment, and the terminal 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. In the embodiment of the present invention, a specific structure of an execution main body of a method for transmitting a signal is not particularly limited in the embodiment of the present invention, as long as the execution main body can perform communication by the method for transmitting a signal according to the embodiment of the present invention by running a program in which a code of the method for transmitting a signal of the embodiment of the present invention is recorded, for example, the execution main body of the method for wireless communication of the embodiment of the present invention may be a terminal device or a network device, or a functional module capable of calling a program and executing the program in the terminal device or the network device.

Moreover, various aspects or features of embodiments of the invention may be implemented as a method, apparatus, or article of manufacture using standard programming and/or engineering techniques. The term "article of manufacture" as used herein is intended to encompass a computer program accessible from any computer-readable device, carrier, or media. For example, computer-readable media can include but are not limited to magnetic storage devices (e.g., hard disk, floppy disk, magnetic strips, etc.), optical disks (e.g., Compact disk ("CD"), digital versatile disk ("DVD"), etc.), smart cards, and flash Memory devices (e.g., Erasable Programmable Read-Only Memory ("EPROM"), card, stick, or key drive, etc.). In addition, various storage media described herein can represent one or more devices and/or other machine-readable media for storing information. The term "machine-readable medium" can include, without being limited to, wireless channels and various other media capable of storing, containing, and/or carrying instruction(s) and/or data.

Fig. 1 is a schematic diagram of a communication system 100 to which the method and apparatus for wireless communication of embodiments of the present invention are applicable. As shown in fig. 1, the communication system 100 includes a network device 102, and the network device 102 may include 1 or more antennas. Additionally, network device 102 can additionally include a transmitter chain and a receiver chain, each of which can comprise a plurality of components associated with signal transmission and reception (e.g., processors, modulators, multiplexers, demodulators, demultiplexers, antennas, etc.), as will be appreciated by one skilled in the art.

Network device 102 may communicate with a plurality of terminal devices, such as terminal device 104 and terminal device 106. However, it is understood that network device 102 may communicate with any number of terminal devices similar to

terminal devices

104 or 106. The

end devices

104 or 106 may be, for example, cellular phones, smart phones, laptops, handheld communication devices, handheld computing devices, satellite radios, global positioning systems, PDAs, wearable devices, and/or any other suitable device for communicating over the wireless communication system 100.

For example, network device 102 may transmit information to a terminal device (e.g., terminal device 104 or 106) over a forward link and receive information from the terminal device over a reverse link.

For example, in a Frequency Division Duplex (FDD) system, the forward link may utilize a different Frequency band than that used by the reverse link.

As another example, in a Time Division Duplex (TDD) system and a full Duplex (fullbduplex) system, the forward link and the reverse link may use a common frequency band.

Each antenna (or group of antennas consisting of multiple antennas) and/or area designed for communication is referred to as a sector of network device 102. For example, antenna groups may be designed to communicate to terminal devices in a sector of the areas covered by network device 102. During communication of network device 102 with terminal devices over respective forward links, the transmitting antennas of network device 102 may utilize beamforming to improve signal-to-noise ratio of the forward links. Moreover, mobile devices in neighboring cells can experience less interference when network device 102 utilizes beamforming to transmit to terminal devices scattered randomly through an associated coverage area, as compared to a manner in which the network device transmits through a single antenna to all of its terminal devices.

At a given time, network device 102, terminal device 104, or terminal device 106 may be a wireless communication transmitting apparatus and/or a wireless communication receiving apparatus. When sending data, the wireless communication sending device may encode the data for transmission. Specifically, the wireless communication transmitting device may obtain (e.g., generate, receive from other communication devices, or save in memory, etc.) a number of data bits to be transmitted over the channel to the wireless communication receiving device. Such data bits may be contained in a transport block (or transport blocks) of data, which may be segmented to produce multiple code blocks.

In addition, the communication system 100 may be a PLMN network, a D2D network, an M2M network, or other networks, and fig. 1 is a simplified schematic diagram for example, and other network devices may be included in the network, which are not shown in fig. 1.

It should be noted that, in the embodiment of the present invention, the first terminal device may be one of the terminal device 104 or the terminal device 106, and the second terminal device may be the other of the terminal device 104 or the terminal device 106.

By way of example and not limitation, in the embodiment of the present invention, the types of the first terminal device and the second terminal device may be different, for example, the first terminal device may be a smartphone, and the second terminal device may be a wearable device.

In addition, in the embodiment of the present invention, the communication capabilities of the first terminal device and the second terminal device may be the same or different, for example, the transmission power of the second terminal device may be lower than the transmission power of the first terminal device.

It should be understood that the specific cases of the first terminal device and the second terminal device listed above are only exemplary, and the embodiment of the present invention is not particularly limited, for example, the types of the first terminal device and the second terminal device may also be the same, for example, the first terminal device and the second terminal device may both be a smartphone, or the communication capabilities of the first terminal device and the second terminal device may also be the same, for example, the transmission powers of the first terminal device and the second terminal device may be the same.

The time-frequency resources used by the communication system 100 for wireless communication will be described in detail below.

In this embodiment of the present invention, the time-frequency resource used by the communication system 100 (for example, the time-frequency resource used for communication between the network device 102 and the

terminal device

104 or 106, and/or the adaptive resource used for communication between the terminal device 104 and the terminal device 106) may be an authorized time-frequency resource or an unauthorized time-frequency resource, or in this embodiment of the present invention, each communication device (for example, a network device or a terminal device) in the communication system 100 may use the time-frequency resource for communication based on an unauthorized transmission scheme or use the time-frequency resource for communication based on an authorized manner, which is not particularly limited in this embodiment of the present invention.

The unlicensed time-frequency resource means that, without system allocation, each communication device can share and use the resource included in the unlicensed time-frequency domain. Resource sharing on the unlicensed frequency band means that only the limit on indexes such as transmission power, out-of-band leakage and the like is regulated for the use of a specific frequency spectrum so as to ensure that a plurality of devices commonly using the frequency band meet basic coexistence requirements, and an operator can achieve the purpose of network capacity distribution by using the unlicensed frequency band resource but needs to comply with the regulatory requirements of different regions and different frequency spectrums on the unlicensed frequency band resource. These requirements are usually made to protect public systems such as radar, and to ensure that multiple systems coexist fairly without causing harmful effects to each other as much as possible, including transmit power limitations, out-of-band leakage indicators, indoor and outdoor usage limitations, and in some regions, some additional coexistence strategies. For example, each communication device can use time-frequency resources in a contention mode or a listening mode, for example, a mode specified by Listen Before Talk (LBT).

In order to solve a large amount of MTC services in a future network and meet low-delay and high-reliability service transmission, the patent provides a scheme of authorization-free transmission. The Grant Free transmission in english may be denoted Grant Free. The unlicensed transmission here may be for uplink data transmission. The unlicensed transmission can be understood as any one of the following meanings, or a plurality of meanings, or a combination of partial technical features in the plurality of meanings or other similar meanings:

the unlicensed transmission may refer to: the network equipment allocates and informs the terminal equipment of a plurality of transmission resources in advance; when the terminal equipment has the requirement of uplink data transmission, selecting at least one transmission resource from a plurality of transmission resources pre-allocated by the network equipment, and sending uplink data by using the selected transmission resource; and the network equipment detects the uplink data sent by the terminal equipment on one or more transmission resources in the plurality of pre-allocated transmission resources. The detection may be blind detection, or detection according to a certain control field in the uplink data, or detection in other manners.

The unlicensed transmission may refer to: the network device pre-allocates and informs the terminal device of a plurality of transmission resources, so that when the terminal device has a requirement for uplink data transmission, at least one transmission resource is selected from the plurality of transmission resources pre-allocated by the network device, and the selected transmission resource is used for transmitting uplink data.

The unlicensed transmission may refer to: the method comprises the steps of obtaining information of a plurality of pre-allocated transmission resources, selecting at least one transmission resource from the plurality of transmission resources when uplink data transmission is required, and sending the uplink data by using the selected transmission resource. The manner of acquisition may be acquired from a network device.

The unlicensed transmission may refer to: the method for realizing uplink data transmission of the terminal equipment without dynamic scheduling of the network equipment can be a scheduling mode that the network equipment indicates transmission resources for each uplink data transmission of the terminal equipment through signaling. Alternatively, implementing uplink data transmission of a terminal device may be understood as allowing data of two or more terminal devices to be transmitted on the same time-frequency resource. Alternatively, the transmission resource may be one or more transmission time units of transmission time after the time when the UE receives the signaling. A TTI may refer to a minimum time unit of a Transmission, such as a Transmission Time Interval (TTI), which may be 1ms or 0.5ms, or may be a predetermined TTI.

The unlicensed transmission may refer to: the terminal equipment carries out uplink data transmission without authorization of the network equipment. The authorization may refer to that the terminal device sends an uplink scheduling request to the network device, and the network device sends an uplink authorization to the terminal device after receiving the scheduling request, where the uplink authorization indicates an uplink transmission resource allocated to the terminal device.

The unlicensed transmission may refer to: a contention transmission mode, specifically, may refer to that multiple terminals perform uplink data transmission simultaneously on the same pre-allocated time-frequency resource without requiring a base station to perform authorization.

The data may include service data or signaling data.

The blind detection may be understood as a detection of data that may arrive without predicting whether data arrives. The blind detection may also be understood as a detection without an explicit signaling indication.

By way of example and not limitation, in an embodiment of the present invention, the unlicensed spectrum resource may include a frequency band near 5GHz, or a frequency band near 2.4GHz, or a frequency band near 3.5GHz, or a frequency band near 60 GHz.

For example, but not limited to, the communication system 100 may adopt a long term evolution-Assisted usage (LTE, abbreviated as "LAA-LTE") technology on an Unlicensed carrier, or may also adopt a technology supporting independent deployment of the communication system in an Unlicensed frequency band, such as a standard LTE over Unlicensed spectrum, or may also adopt an LTE (LTE Advanced in Unlicensed spectrum, abbreviated as "LTE-U") technology on an Unlicensed carrier, that is, the communication system 100 may independently deploy the LTE system to the Unlicensed frequency band, and then complete communication in the Unlicensed frequency band by Using an LTE air interface protocol, where the system does not include the Licensed frequency band. The LTE system deployed in the unlicensed frequency band can utilize technologies such as centralized scheduling, interference coordination, self-adaptive reQuest retransmission (HARQ for short) and the like, and access technologies such as Wi-Fi and the like, and the technology has better robustness, can obtain higher spectrum efficiency, and provides larger coverage range and better user experience.

Also, by way of example and not limitation, in the embodiments of the present invention, the communication system 100 may employ, for example, Licensed-Assisted Access (LAA), Dual Connectivity (DC), license-free Assisted Access (standby) technology, and the like. The LAA includes configuration and structure of Carrier Aggregation (CA) in the existing LTE system, and configures carriers (authorized carriers) in multiple unlicensed frequency bands based on the configuration of carriers (authorized carriers) in an authorized frequency band of an operator for communication, and uses the authorized carriers as an auxiliary to communicate using the unlicensed carriers. That is, the LTE device may use a licensed Carrier as a Primary Component Carrier (PCC) or a Primary Cell (PCell) and use an unlicensed Carrier as a Secondary Component Carrier (SCC) or a Secondary Cell (SCell) in a CA manner. The dual connectivity DC technique includes a technique in which a licensed carrier and an unlicensed carrier are jointly used by means of non-CA (or non-ideal backhaul), or also includes a technique in which a plurality of unlicensed carriers are jointly used by means of non-CA. The LTE device may also be deployed directly on the unlicensed carrier by an independent deployment manner.

By way of example and not limitation, in the embodiment of the present invention, the first terminal device may be a terminal device supporting LAA technology.

In addition, in the embodiment of the present invention, each communication device in the communication system 100 may also use the licensed spectrum resource for wireless communication, that is, the communication system 100 of the embodiment of the present invention is a communication system capable of using the licensed frequency band.

Generally, authorized time-frequency resources need to be approved by a national or local wireless committee to use, and different systems, such as an LTE system and a WiFi system, or systems included by different operators may not share and use the authorized time-frequency resources.

In addition, in the embodiment of the present invention, the network device can provide one or more unlicensed cells (or may also be referred to as unlicensed carriers) and one or more licensed cells (or may also be referred to as licensed carriers).

In the embodiment of the present invention, wireless communication (for example, transmission of signals or channels) can be performed between the first terminal device and the second terminal device, and a wireless communication process between the first terminal device and the second terminal device is described in detail below with reference to fig. 2 and 3.

Fig. 2 shows a schematic interaction diagram of a method 200 of communication between a first terminal device and a second terminal device.

As shown in fig. 2, in the embodiment of the present invention, a terminal apparatus # a (i.e., an example of a first terminal apparatus) can perform wireless communication with a network apparatus based on a scheme provided in the prior art, for example, in the embodiment of the present invention, the network apparatus and the terminal apparatus # a may perform downlink transmission using a downlink subframe format # a (i.e., an example of a downlink subframe format). Also, the downlink transmission process between the terminal device # a and the network device may be similar to the prior art, and here, a detailed description thereof is omitted to avoid redundancy.

Thus, at S210, terminal apparatus # a can know the downlink subframe format # a.

Next, an exemplary description is given of a "downlink subframe format" in the embodiment of the present invention.

By way of example and not limitation, in the embodiments of the present invention, the "downlink subframe format" may include the following parameters or information.

A. And (3) a downlink signal or a downlink channel mapping mode.

Specifically, in the embodiment of the present invention, the "downlink subframe format" may refer to a mapping manner of a downlink signal (e.g., a downlink reference signal) or a downlink channel (e.g., a downlink control channel or a downlink data channel) on a time-frequency resource. By way of example and not limitation, the "mapping manner" may refer to a time-frequency location of a time-frequency resource used for carrying a downlink signal or a downlink channel in one TTI, for example. For another example, the "mapping manner" may refer to a time domain position, or a configuration pattern, of a time-frequency resource used for carrying a downlink signal or a downlink channel in a radio frame (e.g., including an uplink subframe and a downlink subframe). For another example, the "mapping manner" may refer to a transmission period, or a transmission interval, of the downlink signal.

B. And (3) the structure of a downlink subframe.

For example, in the embodiment of the present invention, the downlink subframe format may refer to a length of a downlink subframe carried by a downlink signal (e.g., a downlink reference signal) or a downlink channel (e.g., a downlink control channel or a downlink data channel). For example, the length of the subframes of different downlink subframe formats may be different.

For another example, in the embodiment of the present invention, the downlink subframe format may refer to a timeslot division manner or a symbol division manner of a downlink subframe carried by a downlink signal (e.g., a downlink reference signal) or a downlink channel (e.g., a downlink control channel or a downlink data channel), or the downlink subframe format may refer to a timeslot or a number of symbols included in a downlink subframe carried by a downlink signal (e.g., a downlink reference signal) or a downlink channel (e.g., a downlink control channel or a downlink data channel). For example, different communication systems, or different services, have different requirements on data transmission delay, and therefore, in the embodiment of the present invention, a plurality of downlink subframe formats with different subframe lengths may be provided. By way of example and not limitation, in the embodiment of the present invention, for example, subframes of different downlink subframe formats may include different numbers of slots, and for example, subframes of different downlink subframe formats may include different numbers of symbols.

For example, but not by way of limitation, as a downlink subframe format for the DRS, the downlink subframe format may be used to indicate a transmission period of the DRS (for example, may be configured to be 40, 80, or 160ms), may also be used to indicate a length of a primary DRS burst (for example, may be configured to be 1 to 5ms for FDD, and may be configured to be 2 to 5ms for TDD), and may also be used to indicate a DRS subframe where a synchronization signal is located in the primary DRS burst. It should be noted that, in the LAA system, a DRS subframe in which a synchronization signal is located in one DRS burst may include only the first 12 symbols of the subframe. The DRS includes a primary synchronization signal PSS, a secondary synchronization signal SSS, and a common reference signal CRS with an antenna port of 0, and optionally, the DRS may further include a channel state information reference signal CSI-RS with an antenna port of 15.

C. And the sending time of the downlink subframe.

For example, in the embodiment of the present invention, the downlink subframe format may refer to a transmission time of a downlink subframe in which a downlink signal (e.g., a downlink reference signal) or a downlink channel (e.g., a downlink control channel or a downlink data channel) is carried. For example, in the embodiment of the present invention, the transmission time of the downlink subframe may be a subframe boundary, a slot boundary, or a symbol boundary at which the network device transmits a downlink signal. For another example, in this embodiment of the present invention, the sending time of the downlink subframe may be a subframe boundary, a slot boundary, or a symbol boundary of a subframe within a Discovery signal Measurement timing configuration (DMTC) window configured by the network device.

It should be understood that the definitions or uses of the "downlink subframe format" and the specific parameters or information included in the "downlink subframe format" and the transmission time of the "downlink subframe format" are merely exemplary, and the present invention is not limited thereto, and the definitions of the "downlink subframe format" may also be similar to the prior art, for example, the definitions of the "downlink subframe format" may be the definitions specified in the existing communication protocol, or the parameters or information included in the "downlink subframe format" may also be the parameters or information specified in the existing communication protocol.

It should be noted that, depending on the type of signals transmitted by the network device and the terminal device # a during downlink transmission, the downlink subframe format # a may also be changed, that is, by way of example and not limitation, in an embodiment of the present invention, the downlink subframe format # a may include at least one of the following formats:

1. a downlink subframe format of a downlink reference signal (i.e., an example of a first downlink subframe format, hereinafter, referred to as a downlink subframe format # a-1 for ease of understanding and distinction);

2. a downlink subframe format corresponding to the downlink control channel (i.e., an example of the second downlink subframe format, hereinafter referred to as downlink subframe format # a-2 for ease of understanding and distinction);

3. the downlink subframe format corresponding to the downlink data channel (i.e., an example of the third downlink subframe format, hereinafter referred to as downlink subframe format # a-3 for ease of understanding and distinction).

As shown in fig. 2, when terminal apparatus # B (i.e., an example of the second terminal apparatus) needs to transmit a signal or channel (i.e., an example of the first signal) to terminal apparatus # a, terminal apparatus # B may determine the downlink subframe format # a at S210.

For example, but not by way of limitation, in the embodiment of the present invention, the downlink subframe format # a may be specified by a system or a communication protocol, and thus, the terminal apparatus # B may determine the downlink subframe format # a according to the specification of the system or the communication protocol (for example, the terminal apparatus # B is configured with relevant information of the downlink subframe format # a by a manufacturer or an operator in advance).

for another example, in the embodiment of the present invention, the terminal apparatus # B may be a terminal apparatus that has accessed a cell provided by a network apparatus, or the terminal apparatus # B may be a terminal apparatus located in a coverage area of the network apparatus, that is, the terminal apparatus # B may receive information sent by the network apparatus, so that, for example, the network apparatus may send indication information (denoted as first indication information) of the downlink subframe format # a to the terminal apparatus # B, and the terminal apparatus # B may determine the downlink subframe format # a according to the first indication information.

For another example, in the embodiment of the present invention, the user of terminal apparatus # B may input the information related to downlink subframe format # a to terminal apparatus # B.

It should be understood that the above-listed method and procedure for determining downlink subframe format # a by terminal apparatus # B are only exemplary, and the embodiment of the present invention is not limited thereto, and those skilled in the art may make appropriate changes to the method and procedure for determining downlink subframe format # a by terminal apparatus # B according to practical situations, as long as terminal apparatus # B can know downlink subframe format # a.

By way of example and not limitation, optionally the method further comprises:

and the second terminal equipment determines the downlink subframe format according to the type of the first signal needing to be sent.

Specifically, in this embodiment of the present invention, the terminal apparatus # B may further determine, according to the type of the signal (or the channel) to be transmitted, a downlink subframe format used, for example:

if the first signal includes a reference signal (i.e., an example of the first reference signal), the second terminal device may determine that the first signal (specifically, the first reference signal) needs to be transmitted according to the downlink subframe format # a-1;

if the first signal includes a control channel (i.e., an example of a first control channel), the second terminal device may determine that the first signal (specifically, the first control channel) needs to be transmitted according to downlink subframe format # a-2;

if the first signal includes a data channel (i.e., an example of a first data channel), the second terminal device may determine that the first signal (specifically, the first data channel) needs to be transmitted according to downlink subframe format # a-3.

at S220, terminal apparatus # a and terminal apparatus # B (i.e., an example of a second terminal apparatus) may perform wireless communication according to the downlink subframe format # a, and for example, terminal apparatus # a may transmit signal # α (or channel # α) on carrier # a (specifically, on a time domain range corresponding to the downlink subframe format in carrier # a).

by way of example and not limitation, for example, terminal device # B may map signal # α on a time-frequency resource based on a mapping manner corresponding to downlink subframe format # a, terminal device # a may obtain signal # α from the time-frequency resource based on the mapping manner corresponding to downlink subframe format # a, and the "mapping manner" may refer to a location of the time-frequency resource used for carrying signal # α indicated by downlink subframe format # a, e.g., a location of a symbol used for carrying signal # α in one TTI indicated by downlink subframe format # a in the TTI.

In this embodiment of the present invention, the objects transmitted by terminal apparatus # a and terminal apparatus # B according to the downlink subframe format # a may include a reference signal (i.e., case 1), may also include a control channel (i.e., case 2), and may also include a data channel (i.e., case 3).

Case 1

specifically, in the embodiment of the present invention, terminal apparatus # B may transmit a reference signal (i.e., an example of a first reference signal, hereinafter referred to as reference signal # α -1 for ease of understanding and distinction) to terminal apparatus # a in downlink subframe format # a (specifically, downlink subframe format # a-1), for example, on carrier a.

Here, the Reference Signal (RS) may also be referred to as a Pilot Signal (Pilot Signal), and is a known Signal provided by a transmitting end device (for example, the terminal device # B) to a receiving device (for example, the terminal device # a) for channel estimation, channel measurement, channel sounding, channel demodulation, or the like. In the embodiment of the invention, the reference signal can be applied to a physical layer and does not carry data information from a higher layer.

by way of example and not limitation, in embodiments of the present invention, reference signal # α -1 may include at least one of the following reference signals:

a Cell-specific Reference Signal (CRS), a terminal-equipment-specific Reference Signal (UE-RS), a Channel-State-Information-Reference Signal (PRS), a Beam Reference Signal (BRS), a refined Beam Reference Signal (BRRS), a Phase-compensated Reference Signal (PCRS), a primary synchronization Signal (primary synchronization Signal, PSS), a Secondary Synchronization Signal (SSS), a Channel-State-Information-Reference Signal (CSI-RS), "DRS" for short, also known as Discovery signal), and the like. Wherein, the UE-RS may also be referred to as: demodulation reference Signal (DMRS).

The transmission object between the terminal apparatus # a and the terminal apparatus # B may be one of a set of sequence signals having a good correlation characteristic in addition to the reference signal. The good correlation property is that any one sequence in the set has a large autocorrelation peak and any two sequences in the set have a small cross-correlation peak. That is, in the embodiment of the present invention, a plurality of signals may be transmitted between the terminal apparatus # a and the terminal apparatus # B, where at least one of the signals is a sequence signal having the above-mentioned good correlation, such as a pseudo random (pseudo random) sequence or a Zadoff-chu (Zadoff-chu) sequence.

also, by way of example and not limitation, for example, when the terminal device # B transmits the reference signal # α -1 using the unlicensed frequency band (or unlicensed time-frequency resources), or when the carrier # a is a carrier on the unlicensed frequency band, the terminal device # B may first perform sensing before performing signal transmission using the unlicensed frequency band (e.g., carrier # a), and when the sensing result is that the current carrier # a is available (or resources on the current carrier # a are not occupied by other devices), the reference signal # α -1 is transmitted using the carrier # a based on the downlink subframe format # a-1, e.g., the terminal device # B may carry the reference signal # α -1 on a symbol for carrying the reference signal indicated by the downlink subframe format # a-1 on the carrier # a.

it should be understood that the method and process of the terminal apparatus # B for transmitting the reference signal # α -1 based on the downlink subframe format # a-1 listed above are only exemplary, and the embodiment of the present invention is not limited thereto, for example, the terminal apparatus # B may also transmit the reference signal # α -1 based on the downlink subframe format # a-1 on the authorized spectrum.

accordingly, the terminal apparatus # a may detect whether there is signal transmission on the carrier # a based on the downlink subframe format # a-1 by using, for example, a blind detection method, so as to obtain the reference signal # α -1 transmitted by the terminal apparatus # B through the carrier # a.

for example, reference signal # α -1 may include a CRS, or reference signal # α -1 may include a PSS or a SSS and a CRS, or reference signal # α -1 may include a PSS, a SSS and a CRS, or reference signal # α -1 may include a DRS.

in the embodiment of the present invention, the reference signal # α -1 may have a mapping relationship with the terminal apparatus # B or the terminal apparatus # a, that is, the terminal apparatus # a can determine whether to use the reference signal # α -1 by performing prescribed processing on the reference signal # α -1, for example, determine whether to perform further communication (e.g., synchronization, control channel transmission or data channel transmission, etc.) with the terminal apparatus # B based on the reference signal # α -1.

thus, by way of example and not limitation, in an embodiment of the present invention, the reference signal # α -1 may be generated by the terminal device # B in the following manner.

Mode 1

By way of example and not limitation, in an embodiment of the present invention, for example, terminal device # a may authenticate terminal device # B, and thus terminal device # a may determine that further communication (e.g., synchronization, control channel transmission, data channel transmission, or the like) is required based on the reference signal transmitted by terminal device # B after receiving the reference signal.

Also, the terminal apparatus # B may know in advance the virtual cell id of the terminal apparatus # a (i.e., an example of the first cell id, hereinafter, referred to as "cell id # 1" for easy understanding and distinction) in the authentication procedure, for example, and the terminal apparatus # a may transmit the virtual cell id of the terminal apparatus # a (i.e., the cell id #1) to the terminal apparatus # B in advance.

the terminal apparatus # B may generate the reference signal # α -1 according to the virtual cell identifier (i.e., the cell identifier #1) of the terminal apparatus # a, here, the method and the process for generating the reference signal according to the virtual cell identifier by the terminal apparatus # B may be similar to those in the prior art, and detailed descriptions thereof are omitted to avoid redundancy.

thus, the terminal apparatus # a may generate the reference signal # α -1 based on the virtual cell id and detect the received signal based on the reference signal # α -1 to determine whether the reference signal # α -1 is received, and if the terminal apparatus # a receives the reference signal # α -1, it may be determined that the reference signal # α -1 is generated based on the cell id #1, and further, the terminal apparatus # a may determine that further communication (e.g., synchronization, control channel transmission, data channel transmission, or the like) with the terminal apparatus # B based on the reference signal # α -1 is required based on the cell id # 1.

Here, the process of determining the virtual cell identifier corresponding to the reference signal by the terminal device # a may be a process of performing blind detection on the received signal by the terminal device # a according to the virtual cell identifier, and the method and the process of determining the virtual cell identifier corresponding to the reference signal by the terminal device # a may be similar to those in the prior art, and detailed descriptions thereof are omitted to avoid redundancy.

Mode 2

Also, for example, in the authentication procedure described above, the terminal apparatus # a may allocate a virtual cell id (i.e., an example of the second cell id, hereinafter, referred to as "cell id # 2" for ease of understanding and distinction) indicating the terminal apparatus # B to the terminal apparatus B.

the terminal apparatus # B can generate the reference signal # α -1 from the cell identity # 2.

thus, the terminal apparatus # a may generate the reference signal # α -1 based on the cell id #2 and detect the received signal based on the reference signal # α -1 to determine whether the reference signal # α -1 is received, and if the terminal apparatus # a receives the reference signal # α -1, it may be determined that the reference signal # α -1 is generated based on the cell id #2, and further, the terminal apparatus # a may determine that further communication (e.g., synchronization, control channel transmission, data channel transmission, or the like) with the terminal apparatus # B based on the reference signal # α -1 is required based on the cell id # 2.

Mode 3

For example, when terminal apparatus # a and terminal apparatus # B are located in the same cell, terminal apparatus # a may determine that further communication is required based on the reference signal transmitted by terminal apparatus # B after receiving the reference signal.

in this case, the authentication procedure may be performed together with the transmission procedure of the reference signal, and for example, when the terminal apparatus # a and the terminal apparatus # B are located in the same cell, the terminal apparatus # B may generate the reference signal # α -1 based on an identifier of a cell in which the terminal apparatus # a and the terminal apparatus # B are located in common (i.e., an example of a third cell identifier, hereinafter, referred to as a cell identifier #3 for easy understanding).

thus, the terminal apparatus # a may generate the reference signal # α -1 based on the cell id #3 and detect the received signal based on the reference signal # α -1 to determine whether the reference signal # α -1 is received, and if the terminal apparatus # a receives the reference signal # α -1, it may be determined that the reference signal # α -1 is generated based on the cell id #3, and further, the terminal apparatus # a may determine that further communication (e.g., synchronization, control channel transmission, data channel transmission, or the like) with the terminal apparatus # B based on the reference signal # α -1 is required based on the cell id # 3.

In summary, in the embodiment of the present invention, the first reference signal may be generated according to the first virtual cell identifier.

The first virtual cell identifier may be notified to the second terminal device by the first terminal device.

For example, the first virtual cell identifier may be a virtual cell identifier of the first terminal device, that is, when the first terminal device and the plurality of second terminal devices are connected, the first terminal device may notify the plurality of second terminal devices of the virtual cell identifier of the first terminal device.

For another example, the first virtual cell identifier may be a virtual cell identifier of the second terminal device, that is, when the first terminal device is connected to a plurality of second terminal devices, the first terminal device may allocate a dedicated virtual cell identifier to each second terminal device.

For another example, the first virtual cell identifier may be a cell identifier of a cell in which the first terminal device and the second terminal device are located, that is, when the first terminal device and the plurality of second terminal devices are connected, the first terminal device may notify the plurality of second terminal devices of the cell identifier of the cell in which the first terminal device is located.

That is, the first terminal device and the second terminal device have an authentication procedure before data transmission between the first terminal device and the second terminal device. The authentication process may be one-time or periodic. In this case, the first terminal device only needs to blindly detect the specific reference signal generated based on the specific virtual cell identity.

It should be noted that, if the first virtual cell identifier is a cell identifier of a cell in which the first terminal device and the second terminal device are located, the manner in which the second terminal device obtains the first virtual cell identifier may also be that the second terminal device determines the cell identifier of the cell according to a downlink signal of the cell in which the second terminal device is located.

It should be noted that, in the embodiment of the present invention, the first terminal device and the second terminal device may be in the same cell, and at this time, the first reference signal sent by the second terminal device may be the same as the reference signal sent by the network device in the cell where the first terminal device is located. In this case, the first terminal device only needs to blindly detect one reference signal, thereby reducing the complexity of blind detection. It should be noted that, in the embodiments of the present invention, it is not limited that the first terminal device and the second terminal device are necessarily located in the same cell.

Case 2

specifically, in the embodiment of the present invention, terminal apparatus # B may transmit a control channel (i.e., an example of a first control channel, hereinafter referred to as control channel # α -2 for ease of understanding and distinction) to terminal apparatus # a in downlink subframe format # a (specifically, downlink subframe format # a-2), for example, on carrier a.

Wherein a control channel may be used for conveying signaling, in particular, a control channel may be used for scheduling transmission of a data channel, e.g., a control channel may be used for indicating at least one of the following information:

modulation and Coding Scheme (MCS) of a data channel, resource allocation of the data channel, Hybrid Automatic Repeat reQuest (HARQ) process number, Redundancy version (Redundancy version), new data indication, Precoding Matrix Indicator (PMI), Rank Indicator (RI), antenna port, Downlink Assignment indicator (Downlink Assignment Index), and power control of HARQ-ACK feedback corresponding to the data channel.

Alternatively, the downlink subframe format # a-2 may be a subframe format of a control channel of a cell in which the terminal device # a is located (or a control channel transmitted to the terminal device # a by the network device).

The control channel of the cell in which the terminal apparatus # a is located may be any one of the following control channels:

a Physical Downlink Control Channel ("PDCCH") or an Enhanced Physical Downlink Control Channel ("EPDCCH"), a Machine Type Communication Physical Downlink Control Channel ("MPDCCH") or a short transmission Time Interval Physical Downlink Control Channel ("SPDCCH").

for example, the terminal device # B may transmit the control channel # α -2 using the carrier # a based on the downlink subframe format # a-2, and for example, the terminal device # B may map the control channel # α -2 on a symbol on the carrier # a corresponding to the control channel indicated by the downlink subframe format # a-2.

Accordingly, the terminal apparatus # a may detect whether there is a control channel transmission of the terminal apparatus # B on the carrier # a by using, for example, a blind detection method based on the downlink subframe format # a-2, so as to be able to acquire the control channel transmitted by the terminal apparatus # B through the carrier # a.

In the embodiment of the present invention, there may be a case where a plurality of terminal apparatuses including the terminal apparatus # B transmit a control channel using the carrier # a in common, and in this case, it is necessary for the terminal apparatus # a to identify a control channel to be acquired (i.e., a control channel transmitted by the terminal apparatus # B) from control channels carried on the carrier # a

for example, in the embodiment of the present invention, the control channel # α -2 may have a mapping relationship with the terminal apparatus # B or the terminal apparatus # a, that is, the terminal apparatus # a can determine whether to use the control channel # α -2 by performing a prescribed process on the control channel # α -2, for example, determine whether to perform further communication (e.g., synchronization, control channel transmission, data channel transmission, or the like) with the terminal apparatus # B based on the control channel # α -2.

by way of example and not limitation, in the embodiment of the present invention, the processing that the terminal device # a can specify the control channel # α -2 may include the terminal device # a determining whether the control channel # α -2 carries a specified scrambling code identifier.

Also, by way of example and not limitation, in embodiments of the present invention, the above-mentioned "prescribed scrambling code identification" may include the following scrambling code identifications.

1. Scrambling code identification of terminal equipment # A

By way of example and not limitation, in an embodiment of the present invention, for example, terminal apparatus # a may authenticate terminal apparatus B, and thus terminal apparatus # a may determine that further communication (e.g., data channel transmission, etc.) based on the control channel transmitted by terminal apparatus # B is required after receiving the control channel.

Also, the terminal apparatus # B may know in advance the scrambling code identifier of the terminal apparatus # a (i.e., an example of the first scrambling code identifier, hereinafter, referred to as "scrambling code identifier # 1" for easy understanding and distinction) in the above authentication procedure, for example, and the terminal apparatus # a may transmit the scrambling code identifier of the terminal apparatus # a (i.e., scrambling code identifier #1) to the terminal apparatus # B in advance. Here, the scrambling code identifier may include a Radio Network Temporary Identity (RNTI), which is an identifier used as a terminal device within a signal transmitted between the terminal device and the UTRAN. By way of example and not limitation, scrambling code identity #1 may be a Cell RNTI (Cell RNTI, C-RNTI) for terminal device # a, or a Semi-Persistent Scheduling Cell RNTI (SPS C-RNTI) for terminal device # a, or a Paging RNTI (Paging RNTI, P-RNTI) for terminal device # a, or a secondary link RNTI (Sidelink, SL-RNTI) for terminal device # a.

terminal apparatus # B can carry the scrambling code identification of terminal apparatus # a (i.e., scrambling code identification #1) to control channel # α -2.

thus, terminal apparatus # a blindly detects the presence or absence of control channel # α -2 based on scrambling code identification #1 if terminal apparatus # a detects control channel # α -2, terminal apparatus # a may determine that further communication (e.g., data channel transmission, etc.) with terminal apparatus # B based on the control channel # α -2 is required based on scrambling code identification # 1.

2. Scrambling code identification assigned by terminal equipment # A to terminal equipment # B

Also, for example, in the authentication procedure described above, the terminal apparatus # a may allocate a scrambling code identifier indicating the terminal apparatus # B to the terminal apparatus B (i.e., an example of the second scrambling code identifier, hereinafter, referred to as "scrambling code identifier # 2" for ease of understanding and distinction).

terminal apparatus # B can carry the scrambling code identification #2 to control channel # α -2.

thus, terminal apparatus # a blindly detects the presence or absence of control channel # α -2 based on scrambling code identification #2 if terminal apparatus # a detects control channel # α -2, terminal apparatus # a may determine that further communication (e.g., data channel transmission, etc.) with terminal apparatus # B based on the control channel # α -2 is required based on scrambling code identification # 2.

It should be noted that the authentication processes mentioned in the above cases 1 and 2 can be implemented by one authentication process, or can be implemented by different authentication processes, respectively, and the embodiment of the present invention is not particularly limited.

That is, in the embodiment of the present invention, when there is a plurality of terminal devices including the second terminal device that use the unlicensed carrier in common to transmit the control channel, the first terminal device needs to receive the control channel transmitted by the authenticated second terminal device. In this case, the second terminal device may carry prescribed identification information (e.g., the above-described scrambling code identification #1 or scrambling code identification #2) in the transmitted control channel. It should be noted that the first control channel may be demodulated using the first reference signal. The first control channel may also be demodulated using a terminal device specific reference signal.

in addition, in the embodiment of the present invention, the transmission of the control channel # α -2 may be performed in addition to the transmission of the reference signal # α -1, or the transmission of the control channel # α -2 may be independent of the transmission of the reference signal # α -1, and the embodiment of the present invention is not particularly limited.

Case 3

specifically, in the embodiment of the present invention, terminal apparatus # B may transmit a data channel (i.e., an example of a first data channel, hereinafter referred to as data channel # α -3 for ease of understanding and distinction) to terminal apparatus # a on downlink subframe format # a (specifically, downlink subframe format # a-3), for example, on carrier a.

for example, terminal apparatus # B may transmit the data channel # α -3 using carrier # a based on downlink subframe format # a-3, and for example, terminal apparatus # B may map the data channel # α -3 on a symbol corresponding to the data channel indicated by downlink subframe format # a-3 on carrier # a.

Accordingly, the terminal apparatus # a may detect whether there is signal transmission on the carrier # a based on the downlink subframe format # a-3, for example, in a blind detection manner, so as to be able to acquire the data channel transmitted by the terminal apparatus # B through the carrier # a.

In the embodiment of the present invention, there may be a case where a plurality of terminal apparatuses including the terminal apparatus # B transmit a data channel using the carrier # a in common, and in this case, it is necessary for the terminal apparatus # a to identify a data channel to be acquired (i.e., a data channel transmitted by the terminal apparatus # B) from a control channel carried on the carrier # a

for example, in the embodiment of the present invention, the data channel # α -3 may have a mapping relationship with the terminal apparatus # B or the terminal apparatus # a, that is, the terminal apparatus # a can determine whether to acquire the data carried in the data channel # α -3 by performing a prescribed process on the data channel # α -3.

by way of example and not limitation, in the embodiment of the present invention, the processing that the terminal device # a can specify the data channel # α -3 may include that the terminal device # a determines whether the data channel # α -3 carries a specified user identifier.

Also, by way of example and not limitation, in embodiments of the present invention, the "prescribed user identification" described above may include the following identifications.

1. Device identification of terminal # A

Also, the terminal apparatus # B may know in advance the apparatus identification of the terminal apparatus # a (hereinafter, referred to as apparatus identification #1 for easy understanding and distinction) in the authentication process described above, for example, and the terminal apparatus # a may transmit the apparatus identification of the terminal apparatus # a (i.e., apparatus identification #1) to the terminal apparatus # B in advance. Here, one device identification can uniquely indicate one terminal device.

the terminal apparatus # B can carry the apparatus identification (i.e., apparatus identification #1) of the terminal apparatus # a to the data channel # α -3.

thus, the terminal apparatus # a detects whether the data channel # α -3 exists according to the apparatus identification #1, if the terminal apparatus # a detects the data channel # α -3, the terminal apparatus # a may determine that the data carried in the data channel # α -3 needs to be acquired based on the apparatus identification # 1.

or, after the terminal device # a receives the data channel # α -3, the device identifier carried in the data channel # α -3 may be determined, that is, the terminal device # a may determine that the data channel # α -3 carries the device identifier #1, and further, the terminal device # a may determine that the data carried in the data channel # α -3 needs to be acquired based on the device identifier # 1.

2. Terminal device # A assigns device identification of terminal device # B

By way of example and not limitation, in the embodiment of the present invention, for example, terminal apparatus # a may authenticate terminal apparatus B, and thus terminal apparatus # a may determine that data carried in a data channel transmitted by terminal apparatus # B needs to be acquired after receiving the data channel.

Also, the terminal apparatus # a may assign an apparatus identification indicating the terminal apparatus # B to the terminal apparatus B in, for example, the above-described authentication procedure (hereinafter, for convenience of understanding and distinction, referred to as an apparatus identification # 2).

terminal apparatus # B can carry the apparatus identification #2 to the data channel # α -3.

thus, the terminal apparatus # a detects whether the data channel # α -3 exists according to the apparatus identification #2, if the terminal apparatus # a detects the data channel # α -3, the terminal apparatus # a may determine that the data carried in the data channel # α -3 needs to be acquired based on the apparatus identification # 2.

or, after the terminal apparatus # a receives the data channel # α -3, the apparatus identifier carried by the data channel # α -3 may be determined, that is, the terminal apparatus # a may determine that the data channel # α -3 carries the apparatus identifier #2, and further, the terminal apparatus # a may determine, based on the apparatus identifier #2, that the data carried in the data channel # α -3 needs to be acquired.

It should be noted that the authentication processes mentioned in the above cases 1, 2 and 2 can be implemented by one authentication process, or can be implemented by different authentication processes, respectively, and the embodiment of the present invention is not particularly limited.

That is, in the embodiment of the present invention, when there is a plurality of terminal apparatuses including the second terminal apparatus that transmit a data channel using the unlicensed carrier in common, the first terminal apparatus cannot determine which terminal transmits the received data channel. In this case, the second terminal device may carry prescribed identification information (e.g., the above-described device identification #1 or device identification #2) in the transmitted data channel.

Optionally, the first terminal device sends the response information to the second terminal device. I.e. the communication between the first terminal device and the second terminal device may follow HARQ techniques or ARQ techniques. Taking the example that the communication between the first terminal device and the second terminal device follows the HARQ technology, if the first terminal device demodulates and decodes the received data of the second terminal device correctly, an Acknowledgement (ACK) is fed back to the second terminal device; if the first terminal device does not demodulate and decode the received data of the second terminal device correctly, a Negative Acknowledgement (NACK) is fed back to the second terminal device, and the second terminal device retransmits the data packet after receiving the NACK.

in addition, in the embodiment of the present invention, the transmission of the data channel # α -3 may be performed on the basis of the transmission of the control channel # α -2 and the reference signal # α -1, that is, optionally, the first terminal device may blindly detect the first reference signal, further optionally, the first terminal device may detect the first control channel according to the scrambling code identifier notified to the second terminal device after detecting the first reference signal, may receive the first data channel according to the indication information in the first control channel after the first terminal device correctly receives the first control channel, and, when the transmission of the data channel # α -3 is performed on the basis of the transmission of the control channel # α -2, since the time-frequency resource corresponding to the data channel # α -3 can be indicated through the control channel # α -2, it may not be necessary to carry an identifier (for example, the device identifier #1 or the device identifier #2) for indicating the terminal device # B in the data channel # α -3.

alternatively, the transmission of the data channel # α -3 is performed on the basis of the transmission of the control channel # α -2 and the reference signal # α -1, and when a plurality of second terminal devices use the same first virtual cell identity and/or the same defined scrambling code identity, the plurality of second terminal devices may use a common reference signal for demodulation of the control channel # α -2. in this case, the transmission of the first data channel of each second terminal device preferably uses a transmission mode for terminal device specific reference signal demodulation, e.g. using one of TM7, TM8, TM9, TM 10. alternatively, the transmission of the data channel # α -3 may be independent of the transmission of the control channel # α -2 and the reference signal # α -1.

optionally, in this embodiment of the present invention, after receiving the data channel # α -3 sent by the terminal apparatus # B through the carrier # a, the terminal apparatus # a may obtain a data packet carried in the data channel # α -3 (hereinafter, referred to as "data packet # B" for ease of understanding and understanding), where the data packet # B may be data that the terminal apparatus # B needs to send to the terminal apparatus # a (hereinafter, referred to as "data # 1" for ease of understanding and distinguishing).

By way of example and not limitation, for example, the data #1 may also be data (i.e., an example of first data) that needs to be transmitted to the network device through the terminal device # a, in which case the terminal device # a may also transmit the data #1 to the network device through the carrier # B.

The carrier # B may be a carrier on a licensed frequency band or a carrier on an unlicensed frequency band, and the embodiment of the present invention is not particularly limited.

The carrier # B and the carrier # a may be the same carrier or different carriers, and the embodiment of the present invention is not particularly limited.

By way of example and not limitation, in the embodiment of the present invention, the terminal apparatus # B transmits the data #1 to the network apparatus in the following method.

Method 1

Alternatively, the terminal apparatus # a may not parse (or decapsulate) the packet # B, but further encapsulate the packet # B directly on the basis of the packet # B to generate a packet # a1 that complies with the communication rule between the terminal apparatus # a and the network apparatus, and transmit the packet # a1 to the network apparatus, so that the network apparatus may decapsulate the packet # a1 to obtain a packet # B, and decapsulate the packet # B to obtain data # 1.

Method 2

Alternatively, the terminal apparatus # a may parse (or decapsulate) the packet # B to obtain the data #1, encapsulate the data #1 to generate the packet # a2 according to the communication rule between the terminal apparatus # a and the network apparatus, and transmit the packet # a2 to the network apparatus, so that the network apparatus may decapsulate the packet # a2 to obtain the data # 1.

In addition, by way of example and not limitation, in the embodiment of the present invention, the terminal apparatus # a may transmit data from a plurality of terminal apparatuses (including the terminal apparatus # B) to the network apparatus in one packet. And optionally, the data of each terminal device may carry the identification information of the terminal device, so that the network device may distinguish the terminal device from which each data comes based on the identification information in each data.

Also, by way of example and not limitation, the terminal apparatus # B may transmit the data packet # B to another terminal apparatus, which may transmit the data in the data packet # B to the network apparatus, in addition to the terminal apparatus # a described above. In this case, the network device only needs to be able to correctly receive the data in the data packet # B forwarded by one terminal device, and the communication procedure between the terminal device # B or the network device and the other terminal device may be similar to the communication procedure between the terminal device # B or the network device and the terminal device # a, and here, detailed descriptions thereof are omitted to avoid redundancy.

Alternatively, after successfully receiving and resolving the data #1, the network device may transmit a message indicating that the data reception is successful (hereinafter, for convenience of understanding and explanation, referred to as a success message), for example, via the carrier # a or the carrier # B, to the terminal device # B.

Also, the manner in which the network device transmits the success message to the terminal device # B is the manner in which the network device transmits the downlink data to the terminal device # B. Due to the limited uplink transmission coverage of terminal # B, further optionally, the network device sends the success message in a conservative manner (selecting a lower modulation and coding scheme, a lower target BLER, bundling transmission, multiple retransmissions, etc.), i.e. the network device may assume the correctness of the successful message transmission, i.e. terminal # B does not need to respond to the success message.

By way of example and not limitation, the terminal device # a may be a device with higher transmission power, such as a smartphone, in the prior art, and the terminal device # B may be a device with lower transmission power, such as a wearable device, so that, even in a case where the network device is out of the coverage of the terminal device # B, through the method of wireless communication according to the embodiment of the present invention, the network device can reliably obtain the uplink data of the terminal device # B through forwarding of the terminal device # a.

According to the wireless communication method of the embodiment of the invention, the sending terminal equipment adopts the downlink subframe format used by downlink transmission to send the signal for bearing the information required to be sent to the receiving terminal equipment, and the receiving terminal equipment can receive the information from the sending terminal equipment according to the downlink subframe format used during downlink transmission, so that the communication between the equipment is completed.

In the existing inter-device communication technology, when two terminal devices need to transmit data, one terminal device needs to send request information for requesting to establish inter-device communication connection to the other terminal device, and because the time for sending the request information is dynamically changed, the receiving terminal device needs to detect the request information constantly, thereby causing a large processing burden on the receiving terminal device.

In view of the above, the embodiment of the present invention provides a wireless communication method 300 capable of effectively reducing the processing load of the receiving end device. Fig. 3 shows a schematic interaction diagram of the communication method 300.

As shown in fig. 3, in the embodiment of the present invention, in a cell (hereinafter, referred to as cell # X for ease of understanding and distinction) to which a terminal apparatus # C (i.e., an example of a first terminal apparatus) and a terminal apparatus # D (i.e., an example of a second terminal apparatus) belong, a network apparatus providing the cell # X can perform wireless communication with one or more terminal apparatuses (which may include the terminal apparatus # C or the terminal apparatus # D) in the cell based on a scheme provided in the related art.

It should be noted that the time-frequency resource used in the wireless communication may be a time-frequency resource on a licensed frequency band or a time-frequency resource on an unlicensed frequency band, and the embodiment of the present invention is not particularly limited.

In addition, the wireless communication may include uplink and downlink transmissions.

Thus, at S310, the terminal device # C and the terminal device # D may listen to the frequency band used by the cell # X to determine the end time of the ongoing downlink transmission (or downlink transmission performed at the current time) or the end time of the upcoming downlink transmission (or the first downlink transmission after the current time) on a certain frequency band used by the cell # X (hereinafter, for ease of understanding and distinction, referred to as: frequency band # C). Further, the terminal apparatus # C and the terminal apparatus # D can determine a time range having a preset time length from the end time of the downlink transmission (i.e., an example of the first time range, hereinafter, referred to as: time range #1 for easy understanding and distinction).

In the LTE system, a concept of Transmission opportunity (TxOP) is introduced into a frame structure on an unlicensed frequency band, where the Transmission opportunity may also be referred to as a Transmission Burst (Transmission Burst), and one TxOP may include a Downlink Transmission Burst (DL Transmission Burst).

Optionally, in the embodiment of the present invention, one TxOP may further include an Uplink Transmission Burst (ULTransmission Burst).

By way of example, and not limitation, as shown in fig. 4, a "first time range" may refer to: the time range from the end time of the signal transmission of the last downlink subframe (which may be a complete subframe or a partial subframe) in an ongoing or upcoming downlink burst transmission (for ease of understanding and distinction, it is noted: downlink burst transmission #1) to the start time of the uplink burst transmission. Here, the specific manner of the downlink burst transmission and the uplink burst transmission, the subframe structure, and the like may adopt a scheme provided in the prior art, and here, detailed descriptions thereof are omitted to avoid redundancy.

By way of example and not limitation, the "first time range" only occurs when the last downlink subframe of the downlink burst transmission is a partial subframe, and specifically may refer to: the time range from the end time of the signal transmission of the last downlink subframe within an ongoing or upcoming downlink burst transmission (for ease of understanding and distinction, denoted as downlink burst transmission #2) to the subframe end time of the last downlink subframe of downlink burst transmission # 2. Here, the specific manner of the downlink burst transmission, the subframe structure, and the like may adopt schemes provided in the prior art, and here, detailed descriptions thereof are omitted to avoid redundancy.

Thereafter, the terminal device # C and the terminal device # D may determine a period #1 (i.e., an example of the first period) from a time range #1 on the frequency band # C, wherein the period #1 may be all or a part of the period within the time range #1, the embodiment of the present invention is not particularly limited, and when the period #1 may be a part of the period within the time range #1, the position of the period #1 in the time range #1 may be arbitrarily changed, and the embodiment of the present invention is not particularly limited.

By way of example and not limitation, the time period #1 may be, for example, the first K symbols in the time range #1, K ≧ 1. Or, for example, the period #1 may be the first K symbols that are experienced since the network device completed one data transmission (i.e., one downlink transmission ended).

Also, the terminal apparatus # D may generate request information # M (i.e., an example of transmission request information) for instructing the terminal apparatus # D to request transmission of data to the terminal apparatus # C (i.e., an example of second data, hereinafter, referred to as data #2 for easy understanding and distinction). In the embodiment of the present invention, the format, content and generation manner of the request message # M may be similar to those of the prior art, and a detailed description thereof is omitted here for avoiding redundancy.

At S320, the terminal device # D may transmit the request information # M to the terminal device # C through the frequency band # C in the period # 1.

The terminal apparatus # C can detect whether or not the request information is carried on the frequency band # C in the period #1 (or the time range #1), and can detect the request information # M.

At S330, the terminal apparatus # C and the terminal apparatus # D may perform data transmission based on the request information # M, and the procedure of the data transmission may be similar to the prior art, and a detailed description thereof is omitted here for avoiding redundancy.

That is, in the embodiment of the present invention, the data packet transmitted from terminal apparatus # D to terminal apparatus # C is written as: packet # D, the packet # D may be data that terminal apparatus # D needs to transmit to terminal apparatus # C (i.e., data # 2).

By way of example and not limitation, the data #2 may also be data that needs to be transmitted to the network device by the terminal device # C, in which case the terminal device # C may also transmit the data #2 to the network device by the carrier # D, for example.

The carrier # D may be a carrier on a licensed frequency band or a carrier on an unlicensed frequency band, and the embodiment of the present invention is not particularly limited.

The carrier # D and the carrier # C may be the same carrier or different carriers, and the embodiment of the present invention is not particularly limited.

By way of example and not limitation, in the embodiment of the present invention, the terminal apparatus # C transmits the data #2 to the network apparatus in the following method.

Method 3

Alternatively, the terminal apparatus # C may not parse (or decapsulate) the packet # D, but further encapsulate the packet # D directly on the basis of the packet # D to generate a packet # C1 that conforms to the communication rule between the terminal apparatus # C and the network apparatus, and transmit the packet # C1 to the network apparatus, so that the network apparatus may decapsulate the packet # C1 to obtain a packet # D, and decapsulate the packet # D to obtain data # 2.

Method 4

Alternatively, the terminal apparatus # C may parse (or decapsulate) the packet # D to obtain the data #2, encapsulate the data #2 to generate a packet # C2 according to the communication rule between the terminal apparatus # C and the network apparatus, and transmit the packet # C2 to the network apparatus, so that the network apparatus may decapsulate the packet # C2 to obtain the data # 2.

In addition, by way of example and not limitation, in the embodiment of the present invention, the terminal apparatus # C may transmit data from a plurality of terminal apparatuses (including the terminal apparatus # D) to the network apparatus in one packet. And optionally, the data of each terminal device may carry the identification information of the terminal device, so that the network device may distinguish the terminal device from which each data comes based on the identification information in each data.

Also, by way of example and not limitation, the terminal apparatus # D may transmit the packet # D to another terminal apparatus, which may transmit the data in the packet # D to the network apparatus, in addition to the terminal apparatus # C described above. In this case, the network device only needs to be able to correctly receive the data in the data packet # D forwarded by one terminal device, and the communication procedure between the terminal device # D or the network device and the other terminal device may be similar to the communication procedure between the terminal device # D or the network device and the terminal device # C, and here, detailed description thereof is omitted to avoid redundancy.

Alternatively, after successfully receiving and resolving the data #2, the network device may transmit a message indicating that the data reception is successful (hereinafter, for convenience of understanding and explanation, referred to as a success message), for example, via the carrier # C or the carrier # D, to the terminal device # D.

Also, the manner in which the network device transmits the success message to the terminal device # D is a manner in which the network device transmits downlink data to the terminal device # D. Due to the limited uplink transmission coverage of the terminal device # D, further optionally, the network device sends the success message in a conservative manner (selecting a lower modulation and coding scheme, a lower target BLER, bundling transmission, multiple retransmissions, etc.), i.e. the network device may assume the correctness of the successful message transmission, i.e. the terminal device # D does not need to reply to the success message.

By way of example and not limitation, the terminal device # C may be a device with higher transmission power, such as a smartphone, in the prior art, and the terminal device # D may be a device with lower transmission power, such as a wearable device, so that even in a case where the network device is out of the uplink coverage range of the terminal device # D, through the method of wireless communication according to the embodiment of the present invention, the network device can reliably obtain the uplink data of the terminal device # D through forwarding of the terminal device # C. Further, since the terminal apparatus # C does not need to detect whether or not the transmission request information transmitted by the terminal apparatus # D is received for a long time, the load on the terminal apparatus # C can be reduced.

Fig. 5 shows a schematic block diagram of an apparatus 400 for wireless communication according to an embodiment of the present invention, where the apparatus 400 for wireless communication may correspond to (e.g., may be configured to or is itself the first terminal device (e.g., terminal device # a) described in the method 200, and each module or unit in the apparatus 400 for wireless communication is respectively configured to execute each action or processing procedure executed by the first terminal device (e.g., terminal device # a) in the method 200, and here, a detailed description thereof is omitted to avoid redundancy.

In an embodiment of the present invention, the apparatus 400 may include: a processor and a transceiver, the processor and the transceiver being connected, optionally the device further comprises a memory, the memory being connected to the processor, further optionally the device comprises a bus system. Wherein the processor, the memory and the transceiver may be coupled by a bus system, the memory may be configured to store instructions, and the processor may be configured to execute the instructions stored by the memory to control the transceiver to transmit information or signals.

Wherein the determining unit in the apparatus 400 shown in fig. 5 may correspond to the processor and the communication unit in the apparatus 400 shown in fig. 5 may correspond to the transceiver.

Fig. 6 shows a schematic block diagram of an apparatus 500 for wireless communication according to an embodiment of the present invention, where the apparatus 500 for wireless communication may correspond to (e.g., may be configured to or be itself the) the second terminal device (e.g., terminal device # B) described in the method 200, and each module or unit in the apparatus 500 for wireless communication is respectively configured to execute each action or processing procedure executed by the second terminal device (e.g., terminal device # B) in the method 200, and here, a detailed description thereof is omitted to avoid redundancy.

In an embodiment of the present invention, the apparatus 500 may include: a processor and a transceiver, the processor and the transceiver being connected, optionally the device further comprises a memory, the memory being connected to the processor, further optionally the device comprises a bus system. Wherein the processor, the memory and the transceiver may be coupled by a bus system, the memory may be configured to store instructions, and the processor may be configured to execute the instructions stored by the memory to control the transceiver to transmit information or signals.

Wherein the determining unit in the apparatus 500 shown in fig. 6 may correspond to the processor and the communication unit in the apparatus 500 shown in fig. 6 may correspond to the transceiver.

Fig. 7 shows a schematic block diagram of an apparatus 600 for wireless communication according to an embodiment of the present invention, where the apparatus 600 for wireless communication may correspond to (e.g., may be configured to or be itself the) the first terminal device (e.g., terminal device # C) described in the method 300, and each module or unit in the apparatus 600 for wireless communication is respectively configured to execute each action or processing procedure executed by the first terminal device (e.g., terminal device # C) in the method 300, and here, a detailed description thereof is omitted to avoid redundancy.

In an embodiment of the present invention, the apparatus 600 may include: a processor and a transceiver, the processor and the transceiver being connected, optionally the device further comprises a memory, the memory being connected to the processor, further optionally the device comprises a bus system. Wherein the processor, the memory and the transceiver may be coupled by a bus system, the memory may be configured to store instructions, and the processor may be configured to execute the instructions stored by the memory to control the transceiver to transmit information or signals.

Wherein the determining unit in the apparatus 600 shown in fig. 7 may correspond to the processor and the communication unit in the apparatus 600 shown in fig. 7 may correspond to the transceiver.

Fig. 8 shows a schematic block diagram of an apparatus 700 for wireless communication according to an embodiment of the present invention, where the apparatus 700 for wireless communication may correspond to (e.g., may be configured to or be itself the) the second terminal device (e.g., terminal device # D) described in the method 300, and each module or unit in the apparatus 700 for wireless communication is respectively configured to execute each action or processing procedure executed by the second terminal device (e.g., terminal device # D) in the method 300, and here, a detailed description thereof is omitted to avoid redundancy.

In an embodiment of the present invention, the apparatus 700 may include: a processor and a transceiver, the processor and the transceiver being connected, optionally the device further comprises a memory, the memory being connected to the processor, further optionally the device comprises a bus system. Wherein the processor, the memory and the transceiver may be coupled by a bus system, the memory may be configured to store instructions, and the processor may be configured to execute the instructions stored by the memory to control the transceiver to transmit information or signals.

Wherein the determining unit in the apparatus 700 shown in fig. 8 may correspond to the processor, and the transmitting unit in the apparatus 700 shown in fig. 8 may correspond to the transceiver.

It should be noted that the above method embodiments of the present invention may be applied to or implemented by a processor. The processor may be an integrated circuit chip having signal processing capabilities. In implementation, the steps of the above method embodiments may be performed by integrated logic circuits of hardware in a processor or instructions in the form of software. The Processor may be a general purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), an off-the-shelf programmable Gate Array (FPGA) or other programmable logic device, discrete Gate or transistor logic device, discrete hardware component. The various methods, steps and logic blocks disclosed in the embodiments of the present invention may be implemented or performed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of the method disclosed in connection with the embodiments of the present invention may be directly implemented by a hardware decoding processor, or implemented by a combination of hardware and software modules in the decoding processor. The software module may be located in ram, flash memory, rom, prom, or eprom, registers, etc. storage media as is well known in the art. The storage medium is located in a memory, and a processor reads information in the memory and completes the steps of the method in combination with hardware of the processor.

It will be appreciated that the memory in embodiments of the invention may be either volatile memory or nonvolatile memory, or may include both volatile and nonvolatile memory. The non-volatile Memory may be a Read-Only Memory (ROM), a Programmable ROM (PROM), an Erasable PROM (EPROM), an Electrically Erasable PROM (EEPROM), or a flash Memory. Volatile Memory can be Random Access Memory (RAM), which acts as external cache Memory. By way of example, but not limitation, many forms of RAM are available, such as Static random access memory (Static RAM, SRAM), Dynamic Random Access Memory (DRAM), Synchronous Dynamic random access memory (Synchronous DRAM, SDRAM), Double Data rate Synchronous Dynamic random access memory (DDR SDRAM), Enhanced Synchronous SDRAM (ESDRAM), Synchronous Link DRAM (SLDRAM), and direct memory bus RAM (DR RAM). It should be noted that the memory of the systems and methods described herein is intended to comprise, without being limited to, these and any other suitable types of memory.

It should be understood that the term "and/or" herein is merely one type of association relationship 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.

It should be understood that, in various embodiments of the present invention, the sequence numbers of the above-mentioned processes do not mean the execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation on the implementation process of the embodiments of the present invention.

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 embodiments.

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 invention 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 solutions of the embodiments of the present invention may be essentially implemented or make a contribution to the prior art, or may be implemented in the form of a software product, which is stored in a storage medium and includes several 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 methods described in the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.

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

Claims

1. A method of wireless communication, the method comprising:

a first terminal device determines a downlink subframe format, wherein the downlink subframe format is a subframe format used when downlink transmission is performed between the first terminal device and a network device;

and the first terminal equipment receives a first signal sent by second terminal equipment according to the downlink subframe format, wherein the subframe format corresponding to the first signal is the downlink subframe format.

2. The method of claim 1, wherein the downlink subframe format comprises a first downlink subframe format, wherein the first downlink subframe format is a subframe format of a downlink reference signal sent by the network device to the first terminal device, wherein the first signal comprises a first reference signal, and wherein

The first terminal equipment receives a first signal sent by second terminal equipment according to the downlink subframe format, and the method comprises the following steps:

and the first terminal equipment receives the first reference signal according to the first downlink subframe format.

3. The method according to claim 2, wherein the first reference signal is a reference signal generated according to any one of a first cell identifier, a second cell identifier, or a third cell identifier, wherein the first cell identifier is a virtual cell identifier of the first terminal device, the second cell identifier is a virtual cell identifier allocated by the first terminal device to the second terminal device, and the third cell identifier is a cell identifier of a cell in which the first terminal device and the second terminal device are commonly located.

4. The method of claim 1, wherein the downlink subframe format comprises a second downlink subframe format, wherein the second downlink subframe format is a subframe format of a downlink control channel transmitted by the network device to the first terminal device, wherein the first signal comprises a first control channel, and wherein

and the first terminal equipment receives the first control channel according to the second downlink subframe format.

5. The method of claim 4, wherein the second downlink subframe format comprises a subframe format of any one control channel of a Physical Downlink Control Channel (PDCCH), an Enhanced Physical Downlink Control Channel (EPDCCH), a machine type communication physical downlink control channel (MPDCCH) or a short transmission time interval (STP) physical downlink control channel (SPDCCH).

6. The method according to claim 4 or 5, wherein the scrambling code identifier RNTI carried by the first control channel is a first scrambling code identifier or a second scrambling code identifier, wherein the first scrambling code identifier is a scrambling code identifier of the first terminal device, and the second scrambling code identifier is a scrambling code identifier allocated by the first terminal device for the second terminal device.

7. The method of claim 1, wherein the downlink subframe format comprises a third downlink subframe format, wherein the third downlink subframe format is a subframe format of a downlink data channel transmitted by the network device to the first terminal device, wherein the first signal comprises the first data channel, and wherein

and the first terminal equipment receives the first data channel according to the third downlink subframe format.

8. The method of claim 7, further comprising:

and the first terminal equipment sends the first data carried in the first data channel to network equipment.

9. A method of wireless communication, the method comprising:

the second terminal equipment determines a downlink subframe format, wherein the downlink subframe format is a subframe format used when downlink transmission is carried out between the first terminal equipment and the network equipment;

and the second terminal equipment sends a first signal to the first terminal equipment according to the downlink subframe format, wherein the subframe format corresponding to the first signal is the downlink subframe format.

10. The method of claim 9, wherein the downlink subframe format comprises a first downlink subframe format, wherein the first downlink subframe format is a subframe format of a downlink reference signal sent by the network device to the first terminal device, and wherein

The second terminal device sends a first signal to the first terminal device according to the downlink subframe format, including:

and the second terminal equipment sends a first reference signal to the first terminal according to the first downlink subframe format, wherein the subframe format corresponding to the first reference signal is the first downlink subframe format.

11. The method of claim 10, further comprising:

and the second terminal device generates the first reference signal according to the first downlink subframe format and any one of a first cell identifier, a second cell identifier or a third cell identifier, where the first cell identifier is a virtual cell identifier of the first terminal device, the second cell identifier is a virtual cell identifier allocated to the second terminal device by the first terminal device, and the third cell identifier is a cell identifier of a cell in which the first terminal device and the second terminal device are located together.

12. The method according to claim 9, wherein the downlink subframe format comprises a second downlink subframe format, the second downlink subframe format being a subframe format of a downlink control channel transmitted by the network device to the first terminal device, and

and the second terminal equipment sends a first control channel to the first terminal according to a second downlink subframe format, wherein the subframe format corresponding to the first control channel is the second downlink subframe format.

13. The method of claim 12, wherein the second downlink subframe format comprises a subframe format of any one of a physical downlink control channel PDCCH, an enhanced physical downlink control channel EPDCCH, a machine type communication physical downlink control channel MPDCCH, or a short transmission time interval physical downlink control channel SPDCCH.

14. The method according to claim 12 or 13, wherein the scrambling code identifier RNTI carried by the first control channel is a first scrambling code identifier or a second scrambling code identifier, wherein the first scrambling code identifier is a scrambling code identifier of the first terminal device, and the second scrambling code identifier is a scrambling code identifier allocated by the first terminal device for the second terminal device.

15. The method according to claim 9, wherein the downlink subframe format comprises a third downlink subframe format, the third downlink subframe format being a subframe format of a downlink data channel transmitted by the network device to the first terminal device, and

and the second terminal equipment sends a first data channel to the first terminal equipment according to a third downlink subframe format, wherein the subframe format corresponding to the first data channel is the third downlink subframe format.

16. An apparatus of wireless communication, the apparatus comprising:

a determining unit, configured to determine a downlink subframe format, where the downlink subframe format is a subframe format used when performing downlink transmission between the apparatus and a network device;

and the communication unit is used for receiving a first signal sent by second terminal equipment according to the downlink subframe format, wherein the subframe format corresponding to the first signal is the downlink subframe format.

17. The apparatus of claim 16, wherein the downlink subframe format comprises a first downlink subframe format, wherein the first downlink subframe format is a subframe format of a downlink reference signal sent by the network device to the apparatus, and wherein the first signal comprises a first reference signal; and

the communication unit is specifically configured to receive the first reference signal according to the first downlink subframe format.

18. The apparatus of claim 17, wherein the first reference signal is a reference signal generated according to any one of a first cell identifier, a second cell identifier, or a third cell identifier, and wherein the first cell identifier is a virtual cell identifier of the apparatus, the second cell identifier is a virtual cell identifier allocated by the apparatus for the second terminal device, and the third cell identifier is a cell identifier of a cell in which the apparatus and the second terminal device are co-located.

19. The apparatus of claim 16, wherein the downlink subframe format comprises a second downlink subframe format, the second downlink subframe format being a subframe format of a downlink control channel transmitted by the network device to the apparatus, and wherein the first signal comprises a first control channel; and

the communication unit is specifically configured to receive the first control channel according to the second downlink subframe format.

20. The apparatus of claim 19, wherein the second downlink subframe format comprises a subframe format of any one of a physical downlink control channel PDCCH, an enhanced physical downlink control channel EPDCCH, a machine type communication physical downlink control channel MPDCCH, or a short transmission time interval physical downlink control channel SPDCCH.

21. The apparatus according to claim 19 or 20, wherein the scrambling code identifier RNTI carried by the first control channel is a first scrambling code identifier or a second scrambling code identifier, wherein the first scrambling code identifier is a scrambling code identifier of the apparatus, and the second scrambling code identifier is a scrambling code identifier allocated by the apparatus for the second terminal device.

22. The apparatus of claim 16, wherein the downlink subframe format comprises a third downlink subframe format, wherein the third downlink subframe format is a subframe format of a downlink data channel transmitted by the network device to the apparatus, and wherein the first signal comprises a first data channel; and

the communication unit is specifically configured to receive the first data channel according to the third downlink subframe format.

23. The apparatus of claim 22, wherein the communication unit is further configured to send the first data carried in the first data channel to a network device.

24. An apparatus of wireless communication, the apparatus comprising:

a determining unit, configured to determine a downlink subframe format, where the downlink subframe format is a subframe format used when performing downlink transmission between a first terminal device and a network device;

and a communication unit, configured to send a first signal to the first terminal device according to the downlink subframe format, where a subframe format corresponding to the first signal is the downlink subframe format.

25. The apparatus of claim 24, wherein the downlink subframe format comprises a first downlink subframe format, and wherein the first downlink subframe format is a subframe format of a downlink reference signal sent by the network device to the first terminal device, and wherein

The communication unit is specifically configured to send a first reference signal to the first terminal according to the first downlink subframe format, where a subframe format corresponding to the first reference signal is the first downlink subframe format.

26. The apparatus of claim 25, wherein the determining unit is further configured to generate the first reference signal according to the first downlink subframe format and any one of a first cell id, a second cell id, or a third cell id, where the first cell id is a virtual cell id of the first terminal device, the second cell id is a virtual cell id allocated by the first terminal device to the apparatus, and the third cell id is a cell id of a cell in which the first terminal device and the apparatus are located together.

27. The apparatus of claim 24, wherein the downlink subframe format comprises a second downlink subframe format, and wherein the second downlink subframe format is a subframe format of a downlink control channel sent by the network device to the first terminal device, and wherein

The communication unit is specifically configured to send a first control channel to the first terminal according to a second downlink subframe format, where a subframe format corresponding to the first control channel is the second downlink subframe format.

28. The apparatus of claim 27, wherein the second downlink subframe format comprises a subframe format of any one of a physical downlink control channel PDCCH, an enhanced physical downlink control channel EPDCCH, a machine type communication physical downlink control channel MPDCCH, or a short transmission time interval physical downlink control channel SPDCCH.

29. The apparatus according to claim 27 or 28, wherein the scrambling code identifier RNTI carried by the first control channel is a first scrambling code identifier or a second scrambling code identifier, wherein the first scrambling code identifier is a scrambling code identifier of the first terminal device, and the second scrambling code identifier is a scrambling code identifier allocated to the apparatus by the first terminal device.

30. The apparatus of claim 24, wherein the downlink subframe format comprises a third downlink subframe format, and wherein the third downlink subframe format is a subframe format of a downlink data channel transmitted by the network device to the first terminal device, and wherein

The communication unit is specifically configured to send a first data channel to the first terminal device according to a third downlink subframe format, where a subframe format corresponding to the first data channel is the third downlink subframe format.