CN113273274B

CN113273274B - Method and apparatus for wireless communication

Info

Publication number: CN113273274B
Application number: CN201980087248.7A
Authority: CN
Inventors: 吴作敏
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2019-04-09
Filing date: 2019-04-09
Publication date: 2023-12-12
Anticipated expiration: 2039-04-09
Also published as: CN113273274A; WO2020206622A1

Abstract

A method and apparatus for wireless communication, the method comprising: the first device transmits first information on the first frequency domain resource, the first information being used to instruct the second device to receive second information or transmit third information on the second frequency domain resource.

Description

Method and apparatus for wireless communication

Technical Field

The embodiment of the application relates to the field of communication, in particular to a method and equipment for wireless communication.

Background

In a communication system based on an unlicensed frequency band, a communication device follows a principle of listen before talk (Listen Before Talk, LBT), that is, before the communication device performs signal transmission on a channel of an unlicensed frequency spectrum, channel interception is needed, and whether data transmission can be performed is determined according to a channel interception result, so that the resource utilization rate is low. Therefore, how to implement data scheduling on unlicensed bands to improve resource utilization is a problem to be solved.

Disclosure of Invention

The embodiment of the application provides a method and equipment for wireless communication, which are beneficial to improving the resource utilization rate, thereby improving the system performance.

In a first aspect, a method of wireless communication is provided, comprising: the first device transmits first information on the first frequency domain resource, the first information being used for indicating the second device to receive second information or transmit third information on the second frequency domain resource

In a second aspect, there is provided a method of wireless communication, comprising: the second device receives first information on the first frequency domain resource, the first information being used to instruct the second device to receive second information or send third information on the second frequency domain resource.

In a third aspect, there is provided a device for wireless communication for performing the method of the first aspect or any possible implementation of the first aspect. In particular, the apparatus comprises means for performing the method of the first aspect or any of the possible implementations of the first aspect.

In a fourth aspect, there is provided a device for wireless communication for performing the method of the second aspect or any possible implementation of the second aspect. In particular, the device comprises means for performing the method of the second aspect or any of the possible implementations of the second aspect.

In a fifth aspect, there is provided an apparatus for wireless communication, the apparatus comprising: including a processor and a memory. The memory is used for storing a computer program, and the processor is used for calling and running the computer program stored in the memory and executing the method in the first aspect or various implementation manners thereof.

In a sixth aspect, there is provided an apparatus for wireless communication, the apparatus comprising: including a processor and a memory. The memory is for storing a computer program and the processor is for calling and running the computer program stored in the memory for performing the method of the second aspect or implementations thereof described above.

A seventh aspect provides a chip for implementing the method of any one of the first to second aspects or each implementation thereof.

Specifically, the chip includes: a processor for calling and running a computer program from a memory, causing a device on which the chip is mounted to perform the method as in any one of the first to second aspects or implementations thereof described above.

In an eighth aspect, a computer-readable storage medium is provided for storing a computer program that causes a computer to perform the method of any one of the above-described first to second aspects or implementations thereof.

In a ninth aspect, there is provided a computer program product comprising computer program instructions for causing a computer to perform the method of any one of the first to second aspects or implementations thereof.

In a tenth aspect, there is provided a computer program which, when run on a computer, causes the computer to perform the method of any one of the first to second aspects or implementations thereof.

Based on the technical scheme, the first equipment can send the first information on the first frequency domain resource and is used for scheduling the second equipment to receive the second information or send the third information on the second frequency domain resource, so that the scheduling of the cross-frequency domain resource can be realized, the resource utilization rate is improved, and the system performance is improved.

Drawings

Fig. 1 is a schematic diagram of an application scenario provided in an embodiment of the present application.

Fig. 2 is a schematic diagram of a method of wireless communication provided by an embodiment of the present application.

Fig. 3 is a schematic diagram of a method of wireless communication according to an embodiment of the present application.

Fig. 4 is a schematic diagram of another method of wireless communication according to an embodiment of the present application.

Fig. 5 is a schematic diagram of a method of wireless communication according to yet another embodiment of the present application.

Fig. 6 is a schematic diagram of a method of wireless communication according to yet another embodiment of the present application.

Fig. 7 is a schematic diagram of a method of wireless communication according to yet another embodiment of the present application.

Fig. 8 is a schematic diagram of a method of wireless communication according to yet another embodiment of the present application.

Fig. 9 is a schematic diagram of a method of wireless communication provided by an embodiment of the present application.

Fig. 10 is a schematic block diagram of a device for wireless communication provided by an embodiment of the present application.

Fig. 11 is a schematic block diagram of a device for wireless communication provided by an embodiment of the present application.

Fig. 12 is a schematic block diagram of a communication device provided in another embodiment of the present application.

Fig. 13 is a schematic block diagram of a chip provided in an embodiment of the present application.

Fig. 14 is a schematic block diagram of a communication system provided by an embodiment of the present application.

Detailed Description

The following description of the technical solutions according to the embodiments of the present application will be given with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.

It should be appreciated that embodiments of the present application may be applied to various communication systems, such as: global system for mobile communications (Global System of Mobile communication, GSM), code division multiple access (Code Division Multiple Access, CDMA) system, wideband code division multiple access (Wideband Code Division Multiple Access, WCDMA) system, general packet radio service (General Packet Radio Service, GPRS), long term evolution (Long Term Evolution, LTE) system, long term evolution advanced (Advanced long term evolution, LTE-a) system, LTE-based access to unlicensed spectrum on unlicensed spectrum (LTE-based access to unlicensed spectrum, LTE-U) system, new Radio (NR) system, and an evolution system of the NR system, such as NR (NR-based access to unlicensed spectrum, NR-U) system on unlicensed spectrum, universal mobile communication system (Universal Mobile Telecommunication System, UMTS), wireless local area network (Wireless Local Area Networks, WLAN), wireless fidelity (Wireless Fidelity, wiFi) or next generation communication system, and the like.

Generally, the number of connections supported by the conventional communication system is limited and easy to implement, however, as the communication technology advances, the mobile communication system will support not only conventional communication but also, for example, device-to-Device (D2D) communication, machine-to-machine (Machine to Machine, M2M) communication, machine type communication (Machine Type Communication, MTC), and inter-vehicle (Vehicle to Vehicle, V2V) communication.

The communication system in the embodiment of the application can be applied to a carrier aggregation (CA, carrier Aggregation) scene, a dual-connection (DC, dual Connectivity) scene and an independent (SA) network deployment scene.

When the communication system in the embodiment of the application is applied to unlicensed spectrum and the network deployment scenario is CA, the CA network deployment scenario may be that the primary carrier is on licensed spectrum and the secondary carrier is on unlicensed spectrum, where the primary carrier and the secondary carrier are connected through an ideal backhaul (backhaul).

When the communication system in the embodiment of the application is applied to the unlicensed spectrum and the network deployment scenario is DC, the DC network deployment scenario may be that the primary carrier is on the licensed spectrum and the secondary carrier is on the unlicensed spectrum, where the primary carrier and the secondary carrier are connected through a non-ideal backhaul, and the system on the primary carrier may belong to different systems with the system on the secondary carrier, for example, the system on the primary carrier is an LTE system, the system on the secondary carrier is an NR system, or the system on the primary carrier may also belong to the same system with the system on the secondary carrier, for example, the systems on the primary carrier and the secondary carrier are both LTE systems or are both NR systems.

When the communication system in the embodiment of the application is applied to the unlicensed spectrum and the network deployment scenario is SA, the terminal equipment can access the network through the system on the unlicensed spectrum.

An exemplary communication system 100 to which embodiments of the present application may be applied is shown in fig. 1. The communication system 100 may include a network device 110, and the network device 110 may be a device that communicates with a terminal device 120 (or referred to as a communication terminal, terminal). Network device 110 may provide communication coverage for a particular geographic area and may communicate with terminal devices located within the coverage area. Alternatively, the network device 110 may be a base station (Base Transceiver Station, BTS) in a GSM system or a CDMA system, a base station (NodeB, NB) in a WCDMA system, an evolved base station (Evolutional Node B, eNB or eNodeB) in an LTE system, or a radio controller in a cloud radio access network (Cloud Radio Access Network, CRAN), or the network device may be a mobile switching center, a relay station, an access point, a vehicle device, a wearable device, a hub, a switch, a bridge, a router, a network-side device in a 5G network, or a network device in a future evolved public land mobile network (Public Land Mobile Network, PLMN), etc.

The communication system 100 further comprises at least one terminal device 120 located within the coverage area of the network device 110. "terminal device" as used herein includes, but is not limited to, a connection via a wireline, such as via a public-switched telephone network (Public Switched Telephone Networks, PSTN), a digital subscriber line (Digital Subscriber Line, DSL), a digital cable, a direct cable connection; and/or another data connection/network; and/or via a wireless interface, e.g., for a cellular network, a wireless local area network (Wireless Local Area Network, WLAN), a digital television network such as a DVB-H network, a satellite network, an AM-FM broadcast transmitter; and/or means of the other terminal device arranged to receive/transmit communication signals; and/or internet of things (Internet of Things, ioT) devices. Terminal devices arranged to communicate over a wireless interface may be referred to as "wireless communication terminals", "wireless terminals" or "mobile terminals". Examples of mobile terminals include, but are not limited to, satellites or cellular telephones; a personal communications system (Personal Communications System, PCS) terminal that may combine a cellular radiotelephone with data processing, facsimile and data communications capabilities; a PDA that can include a radiotelephone, pager, internet/intranet access, web browser, organizer, calendar, and/or a global positioning system (Global Positioning System, GPS) receiver; and conventional laptop and/or palmtop receivers or other electronic devices that include a radiotelephone transceiver. A terminal device may refer to an access terminal, user Equipment (UE), subscriber unit, subscriber station, mobile station, remote terminal, mobile device, user terminal, wireless communication device, user agent, or User Equipment. An access terminal may be a cellular telephone, a cordless telephone, a session initiation protocol (Session Initiation Protocol, SIP) phone, a wireless local loop (Wireless Local Loop, WLL) station, a personal digital assistant (Personal Digital Assistant, PDA), a handheld device with wireless communication capabilities, a computing device or other processing device connected to a wireless modem, an in-vehicle device, a wearable device, a terminal device in a 5G network or a terminal device in a future evolved PLMN, etc.

Alternatively, direct terminal (D2D) communication may be performed between the terminal devices 120.

Alternatively, the 5G system or 5G network may also be referred to as a New Radio (NR) system or NR network.

Fig. 1 illustrates one network device and two terminal devices by way of example, and the communication system 100 may alternatively include multiple network devices and may include other numbers of terminal devices within the coverage area of each network device, as embodiments of the application are not limited in this regard.

Optionally, the communication system 100 may further include a network controller, a mobility management entity, and other network entities, which are not limited by the embodiment of the present application.

It should be understood that a device having a communication function in a network/system according to an embodiment of the present application may be referred to as a communication device. Taking the communication system 100 shown in fig. 1 as an example, the communication device may include a network device 110 and a terminal device 120 with communication functions, where the network device 110 and the terminal device 120 may be specific devices described above, and are not described herein again; the communication device may also include other devices in the communication system 100, such as a network controller, a mobility management entity, and other network entities, which are not limited in this embodiment of the present application.

It should be understood that the terms "system" and "network" are used interchangeably herein. The term "and/or" is herein merely an association relationship describing an associated object, meaning that there may be three relationships, e.g., a and/or B, may represent: a exists alone, A and B exist together, and B exists alone. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship.

In the example of the present application, the channel access scheme (or channel detection scheme) on the unlicensed band may include the following types:

type 1 (Category 1, cat-1 LBT for short), the channel detection of type 1 is that LBT is not performed, transmission is immediately performed or immediately performed after the end of a switching time interval, wherein the interval from the end of uplink transmission to the start of downlink transmission does not exceed 16 μs;

type 2 (Cat-2 LBT for short), the channel detection of type 2 is single channel detection, that is, if the result of single channel detection is that the channel is occupied, the channel detection is considered to be failed, and if the result of single channel detection is that the channel is idle, the channel detection is considered to be successful. Specifically, after determining that the first information needs to be sent, the first device may perform a length T on a resource for sending the first information before the first information is sent _one-shot If the channel is idle, the LBT may be considered successful, i.e., the channel detection is successful, and if the channel is occupied, the LBT may be considered failed, i.e., the channel detection is failed. Wherein T is _one-shot The length of (c) may be indicated by the network device, or determined based on traffic priority, or specified by the communication system. Alternatively T _one-shot Is 25 microseconds in length.

Type 4 (Cat-4 LBT for short), the channel detection of type 4 is based on a contention window, and if the channel detection results in the contention window are all idle, the channel detection is considered successful, otherwise, the channel detection is considered failed. Optionally, the size of the contention window may be determined according to a channel access priority, where the channel access priority may correspond to a set of channel access parameters, and as shown in table 1, when channel detection is performed according to Cat-4 LBT, channel detection may be performed according to the channel access parameters corresponding to the channel access priority. It should be understood that the smaller the number corresponding to the channel access priority in table 1, the higher the priority. Alternatively, the channel access priority may be determined according to the length of the time domain resource of the first signal to be transmitted or the priority of the first signal to be transmitted.

Alternatively, the channel detection of type 4 may comprise the steps of:

s1, setting the count value n=n of the counter _init Wherein N is _init Is 0 to CW _p Random numbers uniformly distributed among the two, and executing the step S4;

s2, if N is greater than zero, subtracting 1 from the count value of the counter, i.e., n=n-1;

s3, making the length of the channel as T _sl (wherein T _sl A clear channel assessment (Clear Channel Assessment, CCA) slot detection of length 9us, i.e. CCA slot length 9 us), if the CCA slot is clear, performing step S4; otherwise, executing the step S5;

s4, if N is equal to zero, ending the channel access process; otherwise, executing the step S2;

s5, doing time length for the channel is T _d (T _d ＝16+m _p *9 (us)) with the result that at least one CCA slot is occupied or that all CCA slots are idle;

s6, if the channel detection result is T _d And (4) executing the step (S4) if all CCA time slots are idle in time; otherwise, step S5 is performed.

It should be noted that in this contention window based channel detection, the channel detection may be considered successful when the channel access procedure is ended, otherwise the channel detection is considered to be failed, rather than being considered to be successful when the channel is idle. Wherein CW is _p And m _p May be determined based on the priority of the traffic.

TABLE 1

Wherein CW is _min，p CW corresponding to channel access priority p _p Minimum value of value, CW _max，p CW corresponding to channel access priority p _p Maximum value of the value T _mcot，p And the maximum time length which can be occupied by the signal transmission corresponding to the channel access priority p.

It should be understood that, in the embodiment of the present application, with the updating and development of the standard, the channel access schemes on the unlicensed band may also include other types, or the above-mentioned several types of channel detection schemes may also be adjusted or updated, which is not limited in particular in the embodiment of the present application.

Fig. 2 is a schematic flow chart of a method of wireless communication according to an embodiment of the present application. Alternatively, the method 200 may be performed by a network device or a terminal device in the communication system shown in fig. 1, and as shown in fig. 2, the method may include the following:

s210, the first device transmits first information on the first frequency domain resource, where the first information is used to instruct the second device to receive second information or transmit third information on the second frequency domain resource.

That is, the first information on the first frequency domain resource can be used for scheduling the second information or the third information on the second frequency domain resource, so that the method for wireless communication according to the embodiment of the application can realize data scheduling of the cross-frequency domain resource, thereby improving the utilization rate of the frequency domain resource and improving the system performance.

Optionally, in some embodiments, the first frequency domain resource and the second frequency domain resource may be frequency domain resources on an unlicensed frequency band, that is, the embodiments of the present application can implement scheduling of cross-frequency domain resources on an unlicensed frequency band.

Optionally, in other embodiments, the first frequency domain resource may be a frequency domain resource on an licensed frequency band, and the second frequency domain resource is a frequency domain resource on an unlicensed frequency band, that is, the embodiment of the present application may implement data scheduling of the licensed frequency band to the unlicensed frequency band.

Alternatively, in the embodiment of the present application, the first frequency domain resource and the second frequency domain resource may be in units of a Bandwidth Part (BWP), a carrier, a subband (subband), or other frequency domain units, which is not limited in the embodiment of the present application. For example, the first frequency domain resource may be a first BWP and the second frequency domain resource may be a second BWP. For another example, the first frequency domain resource may be a first carrier and the second frequency domain resource may be a second carrier. For another example, the first frequency domain resource may be a first subband and the second frequency domain resource may be a second subband.

It should be understood that the embodiment of the application can be applied to various data scheduling scenes such as downlink data scheduling, uplink data scheduling, or sidestream data scheduling.

For example, the first device may be a network device, the second device may be a terminal device, the first information may be downlink control information, and the second information may be downlink information, that is, the first device may schedule the second device to receive the downlink information.

For another example, the first device may be a network device, the second device may be a terminal device, the first information may be downlink control information, and the third information may be uplink information, that is, the first device may schedule the second device to send the uplink information.

For another example, the first device may be a terminal device, the second device may be a terminal device, the first information may be side line control information, and the third information may be side line information, that is, the first device may schedule the second device to send or receive the side line information.

Optionally, in some embodiments, the first information may be a physical downlink control Channel (Physical Downlink Control Channel, PDCCH), downlink control information (Downlink Control Information, DCI) in the PDCCH, or may also be a downlink Signal or downlink Channel, and the second information may be a physical downlink shared Channel (Physical Downlink Shared Channel, PDSCH), a Channel-State Information-Reference Signal (CSI-RS), a part or all of a synchronization Signal block (Synchronization Signal Block, SSB), a demodulation Reference Signal (Demodulation Reference Signal, DMRS), a positioning Reference Signal (Positioning Reference Signals, PRS), a tracking Reference Signal (Tracing Reference Signals, TRS), or may also be other signals or channels, for example, a sounding Reference Signal (Sounding Reference Signals, SRS), a Phase tracking Reference Signal (Phase-Tracking Reference Signals, PT-RS), which is not limited by the embodiments of the present application.

It should be appreciated that SSB herein may be used for communication device access network and radio resource management measurements, DMRS may be used for demodulation of channels, CSI-RS may be used for measurement of downlink channels, and PT-RS may be used for downlink time-frequency synchronization or phase tracking. It should be understood that, in the embodiment of the present application, the second information may include a downlink channel or a downlink signal with the same name and different function, or may include a downlink channel or a downlink signal with the same name and different function, which is not limited in this aspect of the present application.

Alternatively, in other embodiments, the first information may be PDCCH, or DCI in PDCCH, or may also be a downlink signal or a downlink channel, and the third information may be a physical uplink shared channel (Physical Uplink Shared Channel, PUSCH), SRS, PT-RS, or may also be other uplink signals or uplink channels, for example, some or all of CSI-RS, SSB, DMRS, PRS, TRS, or the like, which is not limited by the embodiments of the present application.

It should be appreciated that SRS herein may be used for uplink or sidelink channel measurements and PT-RS may be used for uplink or sidelink time-frequency synchronization or phase tracking. It should be understood that, in the embodiment of the present application, the third information may include an uplink channel or an uplink signal or a sidelink channel or a sidelink signal with the same name and different functions, or may include an uplink channel or an uplink signal or a sidelink channel or a sidelink signal with the same name and different functions, which is not limited in this aspect of the present application.

Optionally, in some embodiments, the first device sending the first information on the first frequency domain resource may be that the first device does not perform channel detection on a second frequency domain resource, and directly sends the first information on the first frequency domain resource; or in other embodiments, the first device may first perform channel detection on the second frequency domain resource to determine whether the second frequency domain resource is available, and send the first information on the first frequency domain resource when the second frequency domain resource is available.

For ease of illustration and understanding, the first device is described as transmitting first information on a first frequency domain resource, the first information being used to schedule the second device to receive second information on a second frequency domain resource, is described as embodiment 1, the first device is described as transmitting first information on the first frequency domain resource, the first information being used to schedule the second device to transmit third information on the second frequency domain resource, is described as embodiment 2.

In this embodiment 1, the first device may also send the second information on the second frequency domain resource, alternatively, in some embodiments, the first device may send the second information directly on the second frequency domain resource without channel detection of the second frequency domain resource, or in other embodiments, the first device may also retransmit the second information if it is determined that the second frequency domain resource is available.

Similarly, in this embodiment 2, the second device may also send the third information on the second frequency domain resource, optionally, in some embodiments, the second device may send the third information directly on the second frequency domain resource without channel detection of the second frequency domain resource, or in other embodiments, the second device may also send the third information if it is determined that the second frequency domain resource is available.

It should be understood that, in the embodiment of the present application, the manner in which the first device and the second device perform channel detection on the second frequency domain resource is not limited, for example, the foregoing Cat-2 LBT manner may be used for channel detection, or the foregoing Cat-4 LBT manner may also be used for channel detection, or other newly added channel detection manners may also be used for channel detection, which is not limited in the embodiment of the present application.

Hereinafter, specific implementations of this embodiment 1 and embodiment 2 are described in conjunction with specific examples shown in fig. 3 to 8.

It should be understood that fig. 3 to fig. 5 are specific examples of embodiment 1, where the first device is a network device, the second device is a terminal device, the first information is a PDCCH, the second information is a PDCCH, the first frequency domain resource is a first BWP, i.e. BWP 1, and the second frequency domain resource is a second BWP, i.e. BWP 2. Fig. 6 to fig. 8 are specific examples of embodiment 2, in which the first device is a network device, the second device is a terminal device, the first information is a PDCCH, the third information is a PUSCH, the first frequency domain resource is a first BWP, i.e., BWP 1, and the second frequency domain resource is a second BWP, i.e., BWP 2.

Example 1:

in this embodiment 1, the second information is sent by the first device, and the first device wants to send the second information on the second frequency domain resource, and needs to obtain the usage right of the second frequency domain resource, so the first device may perform channel detection on the second frequency domain resource before sending the second information, to determine whether the second frequency domain resource is available.

As an alternative embodiment of the embodiment 1, denoted as embodiment 1.1, the network device may first determine whether the second BWP is available, and in case the second BWP is available, retransmit the PDCCH, and if the second BWP is not available, the network device may not transmit the PDCCH. Specifically, the network device may perform channel detection on the second BWP before transmitting the PDCCH to determine whether the second BWP is available.

Optionally, in some embodiments, after transmitting the PDCCH and before transmitting the PDSCH, the network device may further determine whether a second BWP is available, in which case the PDSCH is transmitted again. Specifically, the network device may perform channel detection on the second BWP after transmitting the PDCCH and before transmitting the PDSCH to determine whether the second BWP is available, as shown in fig. 3.

Therefore, when the network device wants to schedule the PDSCH on the second BWP through the PDCCH on the first BWP, the network device may perform channel detection on the second BWP before transmitting the PDCCH, so as to ensure that the second BWP can be used for scheduling data, and further perform channel detection on the second BWP before transmitting the PDSCH, which is beneficial to ensure that the second BWP can be used for scheduling data when transmitting the PDSCH.

Alternatively, as an alternative embodiment of the embodiment 1.1, the network device may first perform channel detection on the second BWP using a first channel detection mechanism to determine whether to transmit a PDCCH for scheduling a PDSCH on the second BWP, if the second BWP is available, the network device may transmit the PDCCH, further, before transmitting the PDSCH, the network device may further perform channel detection on the second BWP using a second channel detection mechanism to determine whether the second BWP is available, and if the second BWP is available, retransmit the PDSCH.

It should be understood that, in the embodiment of the present application, the channel detection based on the contention window may correspond to the Cat-4 LBT described above, and the single channel detection may correspond to the Cat-2 LBT described above, and the detailed description of the embodiment is referred to herein and is not repeated.

Optionally, in some embodiments, the first channel detection mechanism may be contention window based channel detection, and the second channel detection mechanism may be contention window based channel detection, and first performing channel detection on the second BWP using Cat-4 LBT may ensure that the second BWP is available, that is, allowing data to be scheduled on the second BWP at this time, and further performing channel detection on the second BWP using Cat-4 LBT before transmitting PDSCH, so as to ensure that the current channel is actually available.

Alternatively, when the first channel detection mechanism and the second channel detection mechanism are both Cat-4 LBT, the same channel access priority may be used, or different channel access priorities may be used, that is, the first channel detection mechanism and the second channel detection mechanism may use the same parameter for channel detection, or may use different parameters for channel detection, where the parameters may include, but are not limited to, some or all of the parameters in table 1.

Alternatively, in other embodiments, the first channel detection mechanism may be contention window based channel detection, and the second channel detection mechanism may be single channel detection, where first performing channel detection on the second BWP using Cat-4 LBT may ensure that the second BWP is available, that is, allowing data to be scheduled on the second BWP at this time, and then performing channel detection on the second BWP using Cat-2 LBT may further ensure that the current channel is actually available.

Optionally, in still other embodiments, the first channel detection mechanism may be single channel detection, the second channel detection mechanism may be channel detection based on a contention window, and the channel detection on the second BWP by using Cat-2 LBT is performed to primarily monitor a channel on the second BWP, determine that the channel is available, and further perform channel detection on the second BWP by using Cat-4 LBT, so as to ensure that the current channel is actually available.

Optionally, in still other embodiments, the first channel detection mechanism may be single channel detection, the second channel detection mechanism may be single channel detection, and using Cat-2 LBT to perform channel detection on the second BWP may primarily monitor a channel on the second BWP, determine that the channel is available, and further using Cat-2 LBT to perform channel detection may ensure that the current channel is actually available.

It should be understood that, in the embodiment of the present application, the channel detection manner of the first channel detection mechanism and the second channel detection mechanism is merely an example, which is not limited by the embodiment of the present application.

As another alternative embodiment of the embodiment 1, denoted as embodiment 1.2, the network device may not perform channel detection on the second BWP before transmitting the PDCCH, perform channel detection on the second BWP after transmitting the PDCCH and before transmitting the PDSCH, and retransmit the PDSCH if it is determined that the second BWP is available, as shown in fig. 4.

Thus, when the network device wants to schedule PDSCH on the second BWP through PDCCH on the first BWP, it may perform channel detection on the second BWP after transmitting PDCCH and before transmitting PDSCH, which is beneficial to ensure that the second BWP is available for transmitting PDSCH.

Alternatively, as an alternative embodiment of the embodiment 1.2, the network device may perform channel detection on the second BWP using a second channel detection mechanism before transmitting the PDSCH, to determine whether the second BWP is available, and in case the second BWP is available, to retransmit the PDSCH.

Alternatively, in some embodiments, the second channel detection mechanism may be contention window based channel detection, and the second BWP is not subjected to channel detection before the PDCCH is transmitted, and the second BWP is subjected to channel detection by Cat-4 LBT before the PDSCH is transmitted, so that the second BWP is guaranteed to be available, that is, PDSCH is allowed to be transmitted on the second BWP at this time.

Alternatively, in other embodiments, the second channel detection mechanism may be single channel detection, and the second BWP is not subjected to channel detection before the PDCCH is transmitted, and the second BWP is subjected to channel detection by Cat-2 LBT before the PDSCH is transmitted, so that the second BWP is ensured to be available, that is, the PDSCH is allowed to be transmitted on the second BWP at this time.

As yet another alternative embodiment of the embodiment 1, denoted as embodiment 1.3, the network device may perform channel detection on the second BWP before transmitting the PDCCH, and may not perform channel detection on the second BWP after transmitting the PDCCH and before transmitting the PDSCH, as shown in fig. 5.

In particular, when the network device transmits a PDCCH to the terminal device on the first BWP, and it desires to schedule the terminal device to receive downlink data on the second BWP, the network device may perform channel detection on the second BWP before transmitting the PDCCH in order to ensure that a channel is available when the network device transmits data on the second BWP, and may not perform channel detection on the second BWP after transmitting the PDCCH and before transmitting the PDSCH, in order to ensure channel availability.

Alternatively, as an alternative embodiment of the embodiment 1.3, the network device may use a first channel detection mechanism to perform channel detection on the second frequency domain resource before transmitting the PDCCH.

Alternatively, in some embodiments, the first channel detection mechanism may be contention window based channel detection. The use of Cat-4 LBT for channel detection of the second BWP before sending PDCCH may ensure that the second BWP is available, i.e. allow PDSCH to be sent on the second BWP at this time, and further, when PDSCH is sent on the second BWP, the network device may send PDSCH directly on the second BWP without channel detection of the second BWP.

Alternatively, in other embodiments, the first channel detection mechanism may be a single channel detection. The channel detection of the second BWP by Cat-2 LBT before transmitting PDCCH may ensure that the second BWP is available, i.e. allow PDSCH to be transmitted on the second BWP at this time, and further, when PDSCH is transmitted on the second BWP, the network device may directly transmit PDSCH on the second BWP without channel detection of the second BWP.

Example 2:

in embodiment 2, the third information is sent by the second device, the first device sends the first information on the first frequency domain resource, and the second device wants to schedule the second device to send the third information on the second frequency domain resource, so the second device needs to obtain the usage right of the second frequency domain resource, and the usage right of the second frequency domain resource can be determined according to the following manner.

As an alternative embodiment of the embodiment 2, denoted as embodiment 2.1, the network device may first determine whether the second BWP is available, and in case the second BWP is available, retransmit the PDCCH, and if the second BWP is not available, the network device may not transmit the PDCCH. Specifically, the network device may perform channel detection on the second BWP before transmitting the PDCCH to determine whether the second BWP is available.

Further, after transmitting the PDCCH, before the terminal device transmits the PUSCH, the terminal device may further determine whether a second BWP is available, and if the second BWP is available, the PUSCH is transmitted again. Specifically, the terminal device may perform channel detection on the second BWP after receiving the PDCCH and before transmitting the PUSCH to determine whether the second BWP is available, as shown in fig. 6.

Therefore, when the network device wants to schedule the PUSCH on the second BWP through the PDCCH on the first BWP, the network device may perform channel detection on the second BWP before transmitting the PDCCH, so as to ensure that the second BWP can be used for scheduling data, and further, before the terminal device transmits the PUSCH, the terminal device further performs channel detection on the second BWP, which is beneficial to ensure that the second BWP can be used for scheduling data when transmitting the PDSCH.

Alternatively, as an alternative embodiment of the embodiment 2.1, the network device may first perform channel detection on the second BWP using a first channel detection mechanism, determine whether to transmit a PDCCH for scheduling a PDSCH on the second BWP, if the second BWP is available, the network device may transmit the PDCCH, further, before the terminal device transmits a PUSCH, the terminal device may further perform channel detection on the second BWP using a third channel detection mechanism, determine whether the second BWP is available, and if the second BWP is available, retransmit the PUSCH, and if the second BWP is not available, the terminal device may not transmit the PUSCH.

Optionally, in some embodiments, the first channel detection mechanism may be contention window based channel detection, and the third channel detection mechanism may be contention window based channel detection, where the network device first uses Cat-4 LBT to perform channel detection on the second BWP to ensure that the second BWP is available, that is, allows scheduling data on the second BWP at this time, and the terminal device further uses Cat-4 LBT to perform channel detection on the second BWP before sending PUSCH, so as to ensure that the current channel is actually available.

Alternatively, in other embodiments, the first channel detection mechanism may be contention window based channel detection, the third channel detection mechanism may be single channel detection, and the network device first performs channel detection on the second BWP using Cat-4 LBT to ensure that the second BWP is available, that is, allows scheduling data on the second BWP at this time, and further performs channel detection on the second BWP using Cat-2 LBT before the terminal device sends PUSCH to ensure that the current channel is actually available.

Optionally, in some other embodiments, the first channel detection mechanism may be single channel detection, the third channel detection mechanism may be contention window based channel detection, the network device may first perform channel detection on the second BWP using Cat-2 LBT, may primarily monitor a channel on the second BWP, determine that a channel is available, and further perform channel detection on the second BWP using Cat-4 LBT before the terminal device sends PUSCH, so as to ensure that the current channel is actually available.

Optionally, in some other embodiments, the first channel detection mechanism may be single channel detection, the third channel detection mechanism may be single channel detection, the network device may perform channel detection on the second BWP by using Cat-2 LBT, may primarily monitor a channel on the second BWP, determine that the channel is available, and further perform channel detection by using Cat-2 LBT before the terminal device sends PUSCH, so as to ensure that the current channel is actually available.

It should be understood that, in the embodiment of the present application, the channel detection manner of the first channel detection mechanism and the third channel detection mechanism is merely an example, which is not limited by the embodiment of the present application.

As another alternative embodiment of the embodiment 2, denoted as embodiment 2.2, the network device may not perform channel detection on the second BWP before transmitting the PDCCH, and the terminal device may perform channel detection on the second BWP after receiving the PDCCH and before transmitting the PUSCH, and re-transmit the PUSCH in case it is determined that the second BWP is available, as shown in fig. 7.

Thus, when the network device wants to schedule PUSCH on the second BWP through PDCCH on the first BWP, the network device may not perform channel detection on the second BWP before transmitting PDCCH, and the terminal device may perform channel detection on the second BWP after receiving PDCCH and before transmitting PUSCH, which is advantageous to ensure that the second BWP is available for transmitting the PUSCH.

Optionally, as an alternative embodiment of the embodiment 2.2, the terminal device may perform channel detection on the second BWP using a third channel detection mechanism before transmitting the PUSCH, determine whether the second BWP is available, and retransmit the PUSCH if the second BWP is available, and may not transmit the PUSCH if the second BWP is not available.

Optionally, in some embodiments, the third channel detection mechanism may be contention window based channel detection, the network device does not perform channel detection on the second BWP before transmitting the PDCCH, and the terminal device performs channel detection on the second BWP using Cat-4 LBT before transmitting the PUSCH may ensure that the second BWP is available, that is, allow the PUSCH to be transmitted on the second BWP at this time.

Alternatively, in other embodiments, the third channel detection mechanism may be single channel detection, where the network device does not perform channel detection on the second BWP before transmitting the PDCCH, and where the terminal device performs channel detection on the second BWP using Cat-2 LBT before transmitting the PUSCH may ensure that the second BWP is available, i.e. allow the PUSCH to be transmitted on the second BWP at this time.

As yet another alternative embodiment of the embodiment 2, denoted as embodiment 2.3, the network device may perform channel detection on the second BWP before transmitting the PDCCH, and the terminal device may not perform channel detection on the second BWP after receiving the PDCCH and before transmitting the PUSCH, as shown in fig. 8.

Specifically, when the network device transmits PDCCH to the terminal device on the first BWP, and it desires to schedule the terminal device to transmit uplink data on the second BWP, in order to ensure availability of a channel, the network device may perform channel detection on the second BWP before transmitting PDCCH, to ensure that a channel is available when the network device transmits data on the second BWP, and may not perform channel detection on the second BWP after the network device transmits PDCCH and before the terminal device transmits PUSCH.

Alternatively, as an alternative embodiment of the embodiment 2.3, the network device may use a first channel detection mechanism to perform channel detection on the second frequency domain resource before transmitting the PDCCH.

Alternatively, in some embodiments, the first channel detection mechanism may be contention window based channel detection. The network device performs channel detection on the second BWP by using Cat-4 LBT before transmitting PDCCH, so as to ensure that the second BWP is available, i.e. allow PDSCH to be transmitted on the second BWP at this time, and further, before the terminal device transmits PUSCH on the second BWP, the terminal device may directly transmit PUSCH on the second BWP without performing channel detection on the second BWP.

Alternatively, in other embodiments, the first channel detection mechanism may be a single channel detection. The network device performs channel detection on the second BWP by using Cat-2 LBT before transmitting PDCCH, so as to ensure that the second BWP is available, i.e. allow PDSCH to be transmitted on the second BWP at this time, and further, before the terminal device transmits PUSCH on the second BWP, the terminal device may directly transmit PUSCH on the second BWP without performing channel detection on the second BWP.

In summary, the first device may schedule downlink data, uplink data or sideline data across frequency domain resources, and the scheduled data may perform channel detection at least once before being sent, so as to ensure that the frequency domain resources corresponding to the data are available, for example, may perform channel detection before sending scheduling information (e.g., first information), or may perform channel detection before sending the scheduled data (e.g., second information or third information), or may perform channel detection before sending the scheduling information, and sending the scheduled data, or may perform channel detection before sending the scheduled data, where a specific adopted channel detection manner may also be various types, and embodiments of the present application are not limited to this.

The method of wireless communication according to an embodiment of the present application is described in detail above with reference to fig. 2 to 8 from the perspective of a first device, and the method of wireless communication according to another embodiment of the present application is described in detail below with reference to fig. 9 from the perspective of a second device. It should be understood that the description on the second device side corresponds to the description on the first device side, and similar descriptions may be referred to above, and are not repeated here for avoiding repetition.

Fig. 9 is a schematic flow chart of a method 300 of wireless communication according to another embodiment of the application, alternatively, the method 300 may be performed by a terminal device in the communication system shown in fig. 1, as shown in fig. 9, the method 300 comprising:

s310, the second device receives first information on the first frequency domain resource, where the first information is used to instruct the second device to receive second information or send third information on the second frequency domain resource.

Optionally, in some embodiments, the method 300 further comprises:

the second device transmits the third information on the second frequency domain resource.

Optionally, in some embodiments, the second device transmits the third information on the second frequency domain resource, including:

The second device determining whether the second frequency domain resource is available;

and transmitting the third information on the second frequency domain resource when the second frequency domain resource is available.

Optionally, in some embodiments, the second device determining whether the second frequency domain resource is available comprises:

the second device performs channel detection on the second frequency domain resource to determine whether the second frequency domain resource is available.

Optionally, in some embodiments, the second device performs channel detection on the second frequency domain resource, including:

and the second equipment adopts a third channel detection mechanism to detect the channel on the second frequency domain resource.

Optionally, in some embodiments, the third channel detection mechanism is single channel detection or contention window based channel detection.

Optionally, in some embodiments, the first information is a physical downlink control channel PDCCH, or downlink control information DCI in the PDCCH;

the second information is at least one of the following:

the physical downlink shared channel PDSCH, a channel state information reference signal CSI-RS, part or all of signals in a synchronous signal block SSB, a demodulation reference signal DMRS, a positioning reference signal PRS and a tracking reference signal TRS.

the third information is at least one of the following:

physical uplink shared channel PUSCH, sounding reference signal SRS, phase tracking reference signal PT-RS.

Optionally, in some embodiments, the first frequency domain resource is a first bandwidth portion BWP or a first carrier, and the second frequency domain resource is a second BWP or a second carrier.

Optionally, in some embodiments, the first device is a network device and the second device is a terminal device.

Optionally, in some embodiments, the first frequency domain resource and the second frequency domain resource are frequency domain resources on an unlicensed frequency band; or (b)

The first frequency domain resource is a frequency domain resource on an authorized frequency band, and the second frequency domain resource is a frequency domain resource on an unauthorized frequency band.

The method embodiment of the present application is described in detail above with reference to fig. 2 to 9, and the apparatus embodiment of the present application is described in detail below with reference to fig. 10 to 14, it being understood that the apparatus embodiment and the method embodiment correspond to each other, and similar descriptions can be made with reference to the method embodiment.

Fig. 10 shows a schematic block diagram of a device 400 for wireless communication according to an embodiment of the application. As shown in fig. 10, the apparatus 400 includes:

the communication module 410 is configured to send first information on the first frequency domain resource, where the first information is used to instruct the second device to receive the second information or send third information on the second frequency domain resource.

Optionally, in some embodiments, the apparatus 400 further comprises:

a determining module, configured to determine whether the second frequency domain resource is available;

the communication module is specifically used for: and transmitting the first information on the first frequency domain resource when the second frequency domain resource is available.

Optionally, in some embodiments, the determining module is specifically configured to

And carrying out channel detection on the second frequency domain resource to determine whether the second frequency domain resource is available.

Optionally, in some embodiments, the communication module 410 is further configured to:

and adopting a first channel detection mechanism to perform channel detection on the second frequency domain resource.

Optionally, in some embodiments, the first channel detection mechanism is single channel detection or contention window based channel detection.

Optionally, in some embodiments, the communication module 410 is further configured to: and transmitting the second information on the second frequency domain resource.

Optionally, in some embodiments, the apparatus 400 further comprises:

the communication module is specifically used for: and transmitting the second information on the second frequency domain resource when the second frequency domain resource is available.

and carrying out channel detection on the second frequency domain resource, and determining whether the second frequency domain resource is available.

and adopting a second channel detection mechanism to perform channel detection on the second frequency domain resource.

Optionally, in some embodiments, the second channel detection mechanism is single channel detection, or contention window based channel detection.

the second information is at least one of the following:

the third information is at least one of the following:

Optionally, in some embodiments, the device 400 is a network device and the second device is a terminal device.

It should be understood that the apparatus 400 according to the embodiment of the present application may correspond to the first apparatus in the embodiment of the method of the present application, and the foregoing and other operations and/or functions of each unit in the apparatus 400 are respectively for implementing the corresponding flow of the first apparatus in the method 200 shown in fig. 2, and are not further described herein for brevity.

Fig. 11 is a schematic block diagram of a device for wireless communication according to an embodiment of the present application. The apparatus 500 of fig. 11 includes:

a communication module 510 is configured to receive first information on a first frequency domain resource, where the first information is configured to instruct the device to receive second information or send third information on a second frequency domain resource.

Optionally, in some embodiments, the method 500 further comprises: the communication module is also for:

and transmitting the third information on the second frequency domain resource.

Optionally, in some embodiments, the apparatus 500 further comprises:

the communication module is specifically used for: and transmitting the third information on the second frequency domain resource when the second frequency domain resource is available.

Optionally, in some embodiments, the determining module is specifically configured to: and carrying out channel detection on the second frequency domain resource to determine whether the second frequency domain resource is available.

Optionally, in some embodiments, the communication module 510 is further configured to:

and adopting a third channel detection mechanism to perform channel detection on the second frequency domain resource.

the second information is at least one of the following:

the third information is at least one of the following:

Optionally, in some embodiments, the first device is a network device, and the device 500 is a terminal device.

It should be understood that the apparatus 500 according to the embodiment of the present application may correspond to the second apparatus in the embodiment of the method of the present application, and the foregoing and other operations and/or functions of each unit in the apparatus 500 are respectively for implementing the corresponding flow of the second apparatus in the method 300 shown in fig. 9, and are not further described herein for brevity.

Fig. 12 is a schematic block diagram of a communication device 600 according to an embodiment of the present application. The communication device 600 shown in fig. 12 comprises a processor 610, from which the processor 610 may call and run a computer program to implement the method in an embodiment of the application.

Optionally, as shown in fig. 12, the communication device 600 may further comprise a memory 620. Wherein the processor 610 may call and run a computer program from the memory 620 to implement the method in an embodiment of the application.

The memory 620 may be a separate device from the processor 610 or may be integrated into the processor 610.

Optionally, as shown in fig. 6, the communication device 600 may further include a transceiver 630, and the processor 610 may control the transceiver 630 to communicate with other devices, and in particular, may send information or data to other devices, or receive information or data sent by other devices.

The transceiver 630 may include a transmitter and a receiver, among others. Transceiver 630 may further include antennas, the number of which may be one or more.

Optionally, the communication device 600 may be specifically a first device in the embodiment of the present application, and the communication device 600 may implement a corresponding flow implemented by the first device in each method in the embodiment of the present application, which is not described herein for brevity.

Optionally, the communication device 600 may be specifically a second device in the embodiment of the present application, and the communication device 600 may implement a corresponding flow implemented by the second device in each method in the embodiment of the present application, which is not described herein for brevity.

Fig. 13 is a schematic structural view of a chip of an embodiment of the present application. The chip 700 shown in fig. 13 includes a processor 710, and the processor 710 may call and run a computer program from a memory to implement the method in the embodiment of the present application.

Optionally, as shown in fig. 13, chip 700 may also include memory 720. Wherein the processor 710 may call and run a computer program from the memory 720 to implement the method in an embodiment of the application.

Wherein the memory 720 may be a separate device from the processor 710 or may be integrated into the processor 710.

Optionally, the chip 700 may also include an input interface 730. The processor 710 may control the input interface 730 to communicate with other devices or chips, and in particular, may obtain information or data sent by other devices or chips.

Optionally, the chip 700 may further include an output interface 740. The processor 710 may control the output interface 740 to communicate with other devices or chips, and in particular, may output information or data to other devices or chips.

Optionally, the chip may be applied to the first device in the embodiment of the present application, and the chip may implement a corresponding flow implemented by the first device in each method in the embodiment of the present application, which is not described herein for brevity.

Optionally, the chip may be applied to the second device in the embodiment of the present application, and the chip may implement a corresponding flow implemented by the second device in each method in the embodiment of the present application, which is not described herein for brevity.

It should be understood that the chips referred to in the embodiments of the present application may also be referred to as system-on-chip chips, or the like.

Fig. 14 is a schematic block diagram of a communication system 900 provided by an embodiment of the present application. As shown in fig. 14, the communication system 900 includes a first device 910 and a second device 920.

The first device 910 may be configured to implement the corresponding function implemented by the first device in the above method, and the second device 920 may be configured to implement the corresponding function implemented by the second device in the above method, which are not described herein for brevity.

It should be appreciated that the processor of an embodiment of the present application may be an integrated circuit chip having signal processing capabilities. In implementation, the steps of the above method embodiments may be implemented by integrated logic circuits of hardware in a processor or instructions in software form. The processor may be a general purpose processor, a digital signal processor (Digital Signal Processor, DSP), an application specific integrated circuit (Application Specific Integrated Circuit, ASIC), an off-the-shelf programmable gate array (Field Programmable Gate Array, FPGA) or other programmable logic device, discrete gate or transistor logic device, discrete hardware components. The disclosed methods, steps, and logic blocks in the embodiments of the present application 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 application may be embodied directly in the execution of a hardware decoding processor, or in the execution of a combination of hardware and software modules in a decoding processor. The software modules may be located in a random access memory, flash memory, read only memory, programmable read only memory, or electrically erasable programmable memory, registers, etc. as well known in the art. The storage medium is located in a memory, and the processor reads the information in the memory and, in combination with its hardware, performs the steps of the above method.

It will be appreciated that the memory in embodiments of the application may be volatile memory or nonvolatile memory, or may include both volatile and nonvolatile memory. The nonvolatile Memory may be a Read-Only Memory (ROM), a Programmable ROM (PROM), an Erasable PROM (EPROM), an Electrically Erasable EPROM (EEPROM), or a flash Memory. The volatile memory may be random access memory (Random Access Memory, RAM) which acts as an external cache. By way of example, and not limitation, many forms of RAM are available, such as Static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double Data Rate SDRAM (Double Data Rate SDRAM), enhanced SDRAM (ESDRAM), synchronous DRAM (SLDRAM), and Direct 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 above memory is illustrative but not restrictive, and for example, the memory in the embodiments of the present application may be Static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDR SDRAM), enhanced SDRAM (ESDRAM), synchronous Link DRAM (SLDRAM), direct RAM (DR RAM), and the like. That is, the memory in embodiments of the present application is intended to comprise, without being limited to, these and any other suitable types of memory.

The embodiment of the application also provides a computer readable storage medium for storing a computer program.

Optionally, the computer readable storage medium may be applied to the first device in the embodiment of the present application, and the computer program causes a computer to execute a corresponding flow implemented by the first device in each method in the embodiment of the present application, which is not described herein for brevity.

Optionally, the computer readable storage medium may be applied to the second device in the embodiment of the present application, and the computer program causes a computer to execute a corresponding flow implemented by the second device in each method in the embodiment of the present application, which is not described herein for brevity.

The embodiment of the application also provides a computer program product comprising computer program instructions.

Optionally, the computer program product may be applied to the first device in the embodiment of the present application, and the computer program instructions cause the computer to execute a corresponding flow implemented by the first device in each method in the embodiment of the present application, which is not described herein for brevity.

Optionally, the computer program product may be applied to the second device in the embodiment of the present application, and the computer program instructions cause the computer to execute the corresponding flow implemented by the second device in each method in the embodiment of the present application, which is not described herein for brevity.

The embodiment of the application also provides a computer program.

Optionally, the computer program may be applied to the first device in the embodiment of the present application, and when the computer program runs on a computer, the computer is caused to execute a corresponding flow implemented by the first device in each method in the embodiment of the present application, which is not described herein for brevity.

Optionally, the computer program may be applied to the second device in the embodiment of the present application, and when the computer program runs on a computer, the computer is caused to execute a corresponding flow implemented by the second device in each method in the embodiment of the present application, which is not described herein for brevity.

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 solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.

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

In the several embodiments provided by the present application, it should be understood that the disclosed systems, devices, and methods may be implemented in other manners. For example, the apparatus embodiments described above are merely illustrative, e.g., the division of the units is merely a logical function division, and there may be additional divisions when actually implemented, e.g., multiple units or components may be combined or integrated into another system, or some features may be omitted or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via some interfaces, devices or units, which may be in electrical, mechanical or other form.

The units described as separate units may or may not be physically separate, and units shown 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 may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

In addition, each functional unit in the embodiments of the present application may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in 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 this understanding, the technical solution of the present application may be embodied essentially or in a part contributing to the prior art or in a part of the technical solution, in the form of a software product stored in a storage medium, comprising several instructions for causing a computer device (which may be a personal computer, a server, a network device, etc.) to perform all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: a usb disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (Random Access Memory, RAM), a magnetic disk, or an optical disk, or other various media capable of storing program codes.

The foregoing is merely illustrative of the present application, and the present application is not limited thereto, and any person skilled in the art will readily recognize that variations or substitutions are within the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A method of wireless communication, comprising: the network device transmits first information on a first bandwidth part BWP or a first carrier on an unlicensed frequency band, said first information being used to instruct the terminal device to receive second information from said network device on a second bandwidth part BWP or a second carrier on an unlicensed frequency band,

wherein the network device sending the first information on the first bandwidth part BWP or the first carrier on the unlicensed band includes:

before transmitting first information on a first bandwidth part BWP or a first carrier on an unlicensed band, the network device determines whether a second bandwidth part BWP or a second carrier on the unlicensed band is available;

in case a second bandwidth part BWP or a second carrier is available on the unlicensed band, the network device transmits the first information on the first bandwidth part BWP or the first carrier on the unlicensed band,

Wherein prior to transmitting the first information on the first bandwidth part BWP or the first carrier on the unlicensed band, the network device determining whether the second bandwidth part BWP or the second carrier on the unlicensed band is available comprises:

the network device employs a first channel detection mechanism to perform channel detection on a second bandwidth part BWP or a second carrier on the unlicensed band, to determine whether the second bandwidth part BWP or the second carrier on the unlicensed band is available,

wherein the method further comprises:

the network device transmits the second information to the terminal device on a second bandwidth part BWP or a second carrier on the unlicensed band,

wherein the network device sending the second information to the terminal device on a second bandwidth part BWP or a second carrier on the unlicensed band comprises:

after transmitting the first information and before transmitting the second information, the network device determines whether a second bandwidth part BWP or a second carrier on the unlicensed band is available;

the network device sends the second information to the terminal device on a second bandwidth part BWP or a second carrier on the unlicensed frequency band, in case the second bandwidth part BWP or the second carrier on the unlicensed frequency band is available.

2. The method of claim 1, wherein the first channel detection mechanism is a single channel detection or a contention window based channel detection.

3. The method of claim 1, wherein the network device determining whether a second bandwidth portion BWP or a second carrier on the unlicensed band is available after the first information is transmitted and before the second information is transmitted comprises: the network device performs channel detection on the second bandwidth part BWP or the second carrier on the unlicensed band by using a second channel detection mechanism, and determines whether the second bandwidth part BWP or the second carrier on the unlicensed band is available.

4. The method of claim 3, wherein the second channel detection mechanism is single channel detection or contention window based channel detection.

5. The method according to any of claims 1 to 4, wherein the first information is a physical downlink control channel, PDCCH, or downlink control information, DCI, in a physical downlink control channel, PDCCH;

the second information is at least one of the following:

6. A network device, comprising:

a communication module for transmitting first information on a first bandwidth part BWP or a first carrier on an unlicensed frequency band, said first information being for instructing a terminal device to receive second information from said network device on a second bandwidth part BWP or a second carrier on an unlicensed frequency band,

wherein the apparatus further comprises:

a determining module, configured to determine, before the communication module sends the first information on a first bandwidth part BWP or a first carrier on an unlicensed frequency band, whether a second bandwidth part BWP or a second carrier on the unlicensed frequency band is available;

the communication module is specifically configured to: in case a second bandwidth part BWP or a second carrier is available on the unlicensed band, the first information is transmitted on the first bandwidth part BWP or the first carrier on the unlicensed band,

wherein the determining module is specifically configured to perform channel detection on the second bandwidth BWP or the second carrier on the unlicensed band by using a first channel detection mechanism, so as to determine whether the second bandwidth BWP or the second carrier on the unlicensed band is available,

Wherein the communication module is further configured to: transmitting said second information to said terminal device on a second bandwidth part BWP or a second carrier on said unlicensed band,

wherein the determining module is further configured to determine whether a second bandwidth part BWP or a second carrier on an unlicensed band is available after the communication module transmits first information on the first bandwidth part BWP or the first carrier on the unlicensed band and before transmitting the second information on the second bandwidth part BWP or the second carrier on the unlicensed band;

the communication module is specifically used for: and in case that the second bandwidth part BWP or the second carrier on the unlicensed band is available, transmitting the second information to the terminal device on the second bandwidth part BWP or the second carrier on the unlicensed band.

7. The network device of claim 6, wherein the first channel detection mechanism is a single channel detection or a contention window based channel detection.

8. The network device of claim 6, wherein the determination module is further configured to:

and adopting a second channel detection mechanism to perform channel detection on the second bandwidth part BWP or the second carrier on the unlicensed frequency band so as to determine whether the second bandwidth part BWP or the second carrier on the unlicensed frequency band is available.

9. The network device of claim 8, wherein the second channel detection mechanism is single channel detection or contention window based channel detection.

10. The network device according to any of claims 6 to 9, wherein the first information is a physical downlink control channel, PDCCH, or downlink control information, DCI, in a physical downlink control channel, PDCCH;

the second information is at least one of the following:

11. An apparatus for wireless communication, comprising: a processor and a memory for storing a computer program, the processor being adapted to invoke and run the computer program stored in the memory for performing the method according to any of claims 1 to 5.

12. A chip, comprising: a processor for calling and running a computer program from a memory, causing a device on which the chip is mounted to perform the method of any one of claims 1 to 5.

13. A computer readable storage medium storing a computer program for causing a computer to perform the method of any one of claims 1 to 5.