CN113170324B

CN113170324B - Wireless communication method, network equipment and terminal equipment for unlicensed spectrum

Info

Publication number: CN113170324B
Application number: CN201980074072.1A
Authority: CN
Inventors: 石聪; 吴作敏; 贺传峰
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2019-02-02
Filing date: 2019-02-02
Publication date: 2023-01-10
Anticipated expiration: 2039-02-02
Also published as: CN113170324A; WO2020155168A1

Abstract

The embodiment of the application provides a wireless communication method, network equipment and terminal equipment for an unlicensed spectrum, which can realize transmission of a downlink channel on the unlicensed spectrum, reduce processing load of the network equipment and reduce overhead of blind detection of the terminal equipment. The method comprises the following steps: executing channel monitoring according to the number of symbols occupied by a first downlink data channel to be transmitted in a time slot; and when monitoring that the channels are idle, sending and scheduling a first downlink control channel and a first downlink data channel of the first downlink data channel.

Description

Wireless communication method, network equipment and terminal equipment for unlicensed spectrum

Technical Field

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

Background

Unlicensed spectrum is a nationally and regionally divided spectrum available for communication by radio devices, which is generally considered a shared spectrum, i.e., communication devices in different communication systems meet national or regional regulatory requirements set on the spectrum, may use the spectrum, and may not require application of a proprietary spectrum license from a government.

In the aspect of unlicensed spectrum communication, how to implement transmission of a downlink channel is an issue to be solved.

Disclosure of Invention

The embodiment of the application provides a wireless communication method, network equipment and terminal equipment for an unlicensed spectrum, which can realize transmission of a downlink channel on the unlicensed spectrum, reduce processing load of the network equipment and reduce overhead of blind detection of the terminal equipment.

In a first aspect, a method for wireless communication in unlicensed spectrum is provided, including: executing channel monitoring according to the number of symbols occupied by a first downlink data channel to be transmitted in a time slot; and when monitoring that the channels are idle, sending and scheduling a first downlink control channel and a first downlink data channel of the first downlink data channel.

In a second aspect, a method for wireless communication in unlicensed spectrum is provided, comprising: detecting a first downlink control channel in a time slot; wherein detecting the location of the first downlink control channel within the timeslot is determined according to: the number of symbols occupied by the first downlink data channel scheduled by the first downlink control channel in the time slot; and under the condition that the first downlink control channel is detected, acquiring the first downlink data channel scheduled by the first downlink control channel in the time slot.

In a third aspect, a method for wireless communication in unlicensed spectrum is provided, comprising: sequentially carrying out channel detection based on at least one candidate time domain position configured to the terminal equipment in the time slot until the channel is detected to be idle; and transmitting a first downlink control channel and a first downlink data channel scheduled by the first downlink control channel from the first candidate time domain position when the channel is detected to be idle based on the first candidate time domain position.

In a fourth aspect, a method of wireless communication for unlicensed spectrum is provided, comprising: sequentially detecting a first downlink control channel at least one candidate time domain position configured by the network equipment in a time slot until the first downlink control channel is detected; and under the condition that the first downlink control channel is detected, acquiring the first downlink data channel scheduled by the first downlink control channel in the time slot.

In a fifth aspect, a network device is provided for performing the method of the first or third aspect.

In particular, the network device comprises functional means for performing the method of the first or third aspect described above.

In a sixth aspect, a terminal device is provided for performing the method of the second or fourth aspect.

In particular, the terminal device comprises functional modules for performing the method of the second or fourth aspect described above.

In a seventh aspect, a network device is provided that includes 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 to execute the method in the first or third aspect.

In an eighth aspect, a terminal device is provided that includes 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 to execute the method in the second or fourth aspect.

In a ninth aspect, a chip is provided for implementing the method of the first or third aspect.

Specifically, the chip includes: a processor for calling and running the computer program from the memory so that the device in which the chip is installed performs the method as in the first or third aspect.

In a tenth aspect, a chip is provided for implementing the method of the second or fourth aspect.

Specifically, the chip includes: a processor for calling and running the computer program from the memory so that the device in which the chip is installed performs the method as in the second or fourth aspect.

In an eleventh aspect, there is provided a computer-readable storage medium storing a computer program for causing a computer to perform the method of the first or third aspect.

In a twelfth aspect, a computer-readable storage medium is provided for storing a computer program for causing a computer to execute the method of the second or fourth aspect.

In a thirteenth aspect, there is provided a computer program product comprising computer program instructions for causing a computer to perform the method of the first or third aspect.

In a fourteenth aspect, there is provided a computer program product comprising computer program instructions for causing a computer to perform the method of the second or fourth aspect.

In a fifteenth aspect, there is provided a computer program which, when run on a computer, causes the computer to perform the method of the first or third aspect described above.

In a sixteenth aspect, there is provided a computer program which, when run on a computer, causes the computer to perform the method of the second or fourth aspect.

According to the technical scheme, channel monitoring is executed according to the number of symbols occupied by the first downlink data channel to be transmitted in a time slot, when the idle of the channel is monitored, the first downlink control channel and the first downlink data channel of the first downlink data channel are sent and scheduled, so that the situation that the network equipment carries out channel monitoring operation on all symbols in the time slot can be avoided, and because the position of channel monitoring is associated with the number of symbols occupied by the sent downlink data channel, the situation that the network equipment needs to prepare more parts of downlink data due to the uncertainty of the position where channel monitoring succeeds can be avoided, and the situation that the terminal equipment needs to carry out more times of blind detection on the first downlink control channel due to the uncertainty of the position occupied by the first downlink control channel can be avoided, so that the processing burden of the network equipment can be reduced, and the overhead of the blind detection of the terminal equipment can be reduced.

Or, the network device may configure a candidate time domain position for blind detection of the downlink control channel, so that blind detection of the downlink control channel may be more flexible. If more candidate time domain positions are needed, more candidate time domain positions can be configured, so that the terminal equipment can blindly detect the downlink control channel at more candidate time domain positions, and the use probability of the channel is improved.

Drawings

Fig. 1 is a schematic diagram of a communication system architecture provided in an embodiment of the present application.

Fig. 2 is a schematic diagram of a partial time slot provided in an embodiment of the present application.

Fig. 3 is a schematic flow chart of a wireless communication method for unlicensed spectrum according to an embodiment of the present application.

Fig. 4 is a schematic diagram of transmitting a Physical Downlink Shared Channel (PDSCH) on an unlicensed spectrum according to an embodiment of the present application.

Fig. 5 is a schematic diagram of transmitting a PDSCH and a placeholder signal on an unlicensed spectrum according to an embodiment of the present application.

Fig. 6 is a schematic flow chart of a wireless communication method for unlicensed spectrum according to an embodiment of the present application.

Fig. 7 is a schematic diagram of a candidate time domain position in a time slot according to an embodiment of the present application.

Fig. 8 is a schematic diagram of transmitting PDSCH on unlicensed spectrum according to an embodiment of the present application.

Fig. 9 is a schematic diagram of transmitting a PDSCH and a reference signal on an unlicensed spectrum according to an embodiment of the present application.

Fig. 10 is a schematic block diagram of a network device according to an embodiment of the present application.

Fig. 11 is a schematic block diagram of a terminal device according to an embodiment of the present application.

Fig. 12 is a schematic block diagram of a communication device according to an 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 according to an embodiment of the present application.

Detailed Description

Technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

The technical scheme of the embodiment of the application can be applied to various communication systems, for example: a Global System for Mobile communications (GSM) System, a Code Division Multiple Access (CDMA) System, a Wideband Code Division Multiple Access (WCDMA) System, a General Packet Radio Service (GPRS), a Long Term Evolution (Long Term Evolution, LTE) System, an LTE Frequency Division Duplex (FDD) System, an LTE Time Division Duplex (TDD) System, an Advanced Long Term Evolution (LTE-a) System, a New Radio (New Radio, NR) System, an Evolution System of the NR System, an LTE (LTE-based Access to unlicensed spectrum, LTE-U) System on an unlicensed Frequency band, an NR (NR-based Access to unlicensed spectrum, NR-U) System on an unlicensed Frequency band, a Universal Mobile Telecommunications System (UMTS), a Worldwide Interoperability for Microwave Access (WiMAX) communication System, a Wireless Local Area Network (WLAN), a Wireless Fidelity (WiFi), a next-generation communication System, or other communication systems.

Generally, the conventional Communication system supports a limited number of connections and is easy to implement, however, with the development of Communication technology, the mobile Communication system 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, and the embodiments of the present application can also be applied to these Communication systems.

For example, a communication system 100 applied in the embodiment of the present application 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, a terminal). Network device 110 may provide communication coverage for a particular geographic area and may communicate with terminal devices located within that coverage area. Optionally, the Network device 110 may be a Base Transceiver Station (BTS) in a GSM system or a CDMA system, a Base Station (NodeB, NB) in a WCDMA system, an evolved Node B (eNB or eNodeB) in an LTE system, or a wireless controller in a Cloud Radio Access Network (CRAN), or may be a Network device in a Mobile switching center, a relay Station, an Access point, a vehicle-mounted 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 Public Land Mobile Network (PLMN) for future evolution, or the like.

The communication system 100 further comprises at least one terminal device 120 located within the coverage area of the network device 110. As used herein, "terminal equipment" includes, but is not limited to, connections via wireline, such as Public Switched Telephone Network (PSTN), digital Subscriber Line (DSL), digital cable, direct cable connection; and/or another data connection/network; and/or via a Wireless interface, such as for a cellular Network, a 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 another terminal device arranged to receive/transmit communication signals; and/or Internet of Things (IoT) devices. A terminal device arranged to communicate over a wireless interface may be referred to as a "wireless communication terminal", "wireless terminal", or "mobile terminal". Examples of mobile terminals include, but are not limited to, satellite or cellular telephones; personal Communications Systems (PCS) terminals that may combine cellular radiotelephones with data processing, facsimile, and data Communications capabilities; PDAs that may include radiotelephones, pagers, internet/intranet access, web browsers, notepads, calendars, and/or Global Positioning System (GPS) receivers; and conventional laptop and/or palmtop receivers or other electronic devices that include a radiotelephone transceiver. Terminal Equipment 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 phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA), a handheld device with Wireless communication capability, a computing device or other processing device connected to a Wireless modem, a vehicle mounted device, a wearable device, a terminal device in a 5G network or a terminal device in a future evolved PLMN, etc.

Optionally, a Device to Device (D2D) communication may be performed between the terminal devices 120.

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

Fig. 1 exemplarily shows one network device and two terminal devices, and optionally, the communication system 100 may include a plurality of network devices and may include other numbers of terminal devices within the coverage area of each network device, which is not limited in this embodiment of the present invention.

Optionally, the communication system 100 may further include other network entities such as a network controller, a mobility management entity, and the like, which is not limited in this embodiment.

It should be understood that, in the embodiments of the present application, a device having a communication function in a network/system 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 having a communication function, and the network device 110 and the terminal device 120 may be the 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 other network entities, for example, a network controller, a mobility management entity, and the like, which is not limited in this embodiment.

It should be understood that the terms "system" and "network" are often used interchangeably herein. The term "and/or" herein is merely an association describing 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.

The method of the embodiment of the application can be applied to communication of the unlicensed spectrum.

Unlicensed spectrum is a nationally and regionally divided spectrum available for communication by radio devices, which may be considered a shared spectrum, i.e., a spectrum that may be used by communication devices in different communication systems as long as it meets the regulatory requirements set by the country or region on the spectrum, and may not be applied for a proprietary spectrum license from the government. In order to enable friendly coexistence of various communication systems using unlicensed spectrum for wireless communication on the spectrum, when a communication device communicates on the unlicensed spectrum, a Listen Before Talk (LBT) principle may be followed, that is, before the communication device performs signal transmission on a channel of the unlicensed spectrum, the communication device needs to perform channel sensing (or referred to as channel detection) first, and only when a result of the channel sensing is that the channel is idle (for example, the LBT is passed or succeeded), the communication device may perform signal transmission; if the communication device performs channel sensing on the unlicensed spectrum resulting in a channel being busy (e.g., LBT failed or failed), then signaling may not be possible. Optionally, the bandwidth of LBT is 20MHz, or an integer multiple of 20 MHz. The Maximum Channel Occupancy Time (MCOT) may refer to a Maximum Time length allowed for signal transmission using a Channel of an unlicensed spectrum after LBT is successful, and different MCOTs exist under different Channel access schemes. The maximum value of MCOT may be, for example, 10ms. It should be understood that the MCOT is the time taken for signal transmission. The Channel Occupancy Time (COT) may refer to a Time length for signal transmission using a Channel of an unlicensed spectrum after LBT is successful, and the signal Occupancy Channel may be discontinuous within the Time length. Wherein one COT may optionally not exceed, for example, 20ms at the longest, and the signal transmission within the COT occupies no more time than the MCOT.

Optionally, in this embodiment of the present application, an operating scenario in which the NR operates in the unlicensed frequency band may include the following operating scenarios:

scene 1: a carrier aggregation scenario, wherein in the scenario, a Primary Cell (PCell) works on a licensed spectrum, and a Secondary Cell (SCell) works on an unlicensed spectrum in an aggregation manner;

scene 2: a dual connectivity working scenario, wherein in the scenario, the PCell works on an LTE licensed spectrum, and a Primary and secondary cell (PScell) works on an NR unlicensed spectrum;

scenario 3, independent operation scenario, where NR operates as an independent cell in unlicensed spectrum

The operating Band (Band) of the NR-U may typically be the 5GHz unlicensed spectrum and the 6GHz unlicensed spectrum (e.g., 5925-7125MHz in the United states, or 5925-6425MHz in Europe, or portions thereof); on the unlicensed spectrum, fairness between the NR-U system and other systems already operating on the unlicensed spectrum, such as Wireless Fidelity (WiFi), etc., can be guaranteed. The principle of fairness is that the NR-U does not have more impact on systems already deployed on unlicensed spectrum (e.g., wiFi) than between these systems.

In order to ensure the fair coexistence between the systems on the unlicensed spectrum, the energy detection may be used as a basic coexistence mechanism, and the energy detection mechanism may be the above-mentioned LBT mechanism.

Since LBT may pass any symbol in a slot, a partial slot (at least when the channel is first preempted) may occur, where a partial slot means that the number of symbols available for the slot is less than 14. Since it takes a certain time for the network device to prepare the downstream data, the network device generally prepares the data before LBT. However, since the network device does not know which Orthogonal Frequency Division Multiplexing (OFDM) symbol the channel gets from, it does not know how many available OFDM symbols are in the partial slot when preparing data, so that multiple different data sets may be prepared to adapt to different possibilities. In the scenario shown in fig. 2, for the network device, the worst case is to prepare 7 PDSCHs with a length of 2 OFDM symbols, and if the Channel is obtained at

symbol #

6, 4 pieces of data can be transmitted (at this time, it is assumed that a Physical Downlink Control Channel (PDCCH) and the PDSCHs are frequency division multiplexed). This approach requires the network device to prepare more copies of data, and the UE blind detection overhead is also large.

Therefore, the embodiments of the present application provide the following method, which can avoid the network device preparing more data, reduce the processing load of the network device, and reduce the blind detection overhead of the terminal device.

Fig. 3 is a schematic flow chart diagram of a method 200 for wireless communication of unlicensed spectrum according to an embodiment of the present application. The method 200 includes at least some of the following.

In 210, according to the number of symbols occupied by the first downlink data channel to be transmitted in the time slot, the network device performs channel monitoring.

Alternatively, the downlink data channel mentioned in the embodiment of the present application may be a PDSCH, and the downlink control channel mentioned in the embodiment of the present application may be a PDSCH.

Optionally, in this embodiment of the present application, a timeslot occupied by one downlink data channel is one timeslot, that is, one downlink data channel does not span timeslots.

Optionally, in this embodiment of the present application, a timeslot occupied by one downlink control channel is one timeslot, that is, one downlink control channel does not span timeslots.

Optionally, in this embodiment of the present application, a time slot occupied by one downlink control channel and a downlink data channel scheduled by the downlink control channel is one time slot, that is, one downlink control channel and a downlink data channel scheduled by the downlink control channel do not span time slots.

The first downlink data channel in the embodiment of the present application may be prepared in advance, for example, may be prepared in the process of performing LBT, or may be prepared before performing LBT.

Specifically, when performing communication on the unlicensed spectrum, the number of symbols occupied by the downlink data channel may be fixed, where the number of symbols occupied by the downlink data channel may be fixed according to the current service transmitted by the terminal device, the processing capability of the terminal device, and the current network condition.

Optionally, the number of symbols occupied by the downlink data channel may be configured to the terminal device by the network device, for example, may be configured through RRC signaling, or may be configured through other signaling.

Optionally, in this embodiment of the present application, the number of symbols occupied by the downlink data channel may be configured semi-statically, that is, may be changed.

Optionally, in this embodiment of the present application, there may be one possibility or more than one possibility for the number of symbols occupied by the downlink data channel.

For example, the number of symbols occupied by the downlink data channel may be 7; for example, the number of symbols occupied by the downlink data channel may be 2,4, or 7, etc.

Optionally, the allocation manner of the downlink data channel in the time domain in the embodiment of the present application may be an allocation manner of type a (typeA) (which may also be referred to as a scheduling manner), or an allocation manner of type B (typeB).

TABLE 1

As shown in table 1 above, for a Normal Cyclic Prefix (CP) (Normal CP), the starting symbol S of the PDSCH of type a may be {0,1,2,3} and the length L may be {3,.., 14} symbols. For type b, the PDSCH starting symbol S may be { 0., 12} and the length L may be {2,4,7}. The scheduling manner of the PDSCH of type a may be understood as a slot-based scheduling manner, because only one PDSCH is transmitted in one slot. The scheduling of PDSCH of type b may be understood as mini-slot (mini-slot) based scheduling, since there may be scheduling of multiple PDSCH in one slot.

Optionally, when the network device schedules Downlink data transmission of the terminal device, a Domain of Time Domain Resource Allocation (TDRA) may be carried in Downlink Control Information (DCI), where the TDRA Domain may be 4 bits, and may indicate 16 different rows in a Resource Allocation table, and each row may include different Resource Allocation combinations, such as a starting position S of a PDSCH, a length L, and different scheduling types (typeA or typeB).

Alternatively, the resource allocation tables may be different for different purposes of downlink data transmission. Such as data scheduling for C-RNTI or CS-RNTI, the table may be configured by RRC.

Alternatively, the terminal device may obtain a PDSCH-time domain resource allocation in the RRC-configured table according to the indication of the TDRA field in the DCI, where the information includes K0 (i.e., the time slot between the PDCCH and the PDSCH), a mapping type (i.e., the above mentioned type a and type b), and a starting symbol and length (startsymbol and length) (based on this parameter, S and L can be calculated, so that the location of the PDSCH in the time domain can be known).

Optionally, in this embodiment of the present application, the network device may determine, according to the number of symbols occupied by the first downlink data channel, a symbol position for performing the channel monitoring; performing the channel monitoring according to the determined symbol position.

Optionally, in this embodiment of the present application, when the first downlink data channel and the first downlink control channel scheduling the first downlink data channel are frequency division multiplexed, channel monitoring may be performed according to the number of symbols occupied by the first downlink data channel, and the number of symbols occupied by the first downlink control channel may not need to be considered (it is assumed here that the number of symbols occupied by the first downlink control channel is smaller than the number of symbols occupied by the first downlink data channel).

For example, assuming that the number of symbols occupied by the first downlink data channel is 7 and the index of the symbol in one slot is from 0 to 13, if it is required to transmit the downlink data channel with the number of symbols of 7 in one slot, frame listening needs to be performed before at least the symbol with the index of 7 is idle, that is, the symbol with the index of 7, for example, channel listening may be performed sequentially based on the symbols #0 to 7, that is, the listening result is expected to be that one of the symbols #0 to 7 is the starting symbol of the idle channel.

Optionally, in this embodiment of the present application, when the first downlink data channel and the first downlink control channel scheduling the first downlink data channel are time division multiplexed, channel sensing may be performed according to the number of symbols occupied by the first downlink data channel and the number of symbols occupied by the first downlink control channel.

For example, assuming that the number of symbols occupied by the first downlink data channel is 7, the number of symbols occupied by the first downlink control channel is 2, and the index of the symbol in one slot is 0 to 13, if the downlink control channel with the number of symbols 2 and the downlink data channel with the number of symbols 7 need to be transmitted in one slot, at least the symbol at the index of 5 needs to be idle, that is, listening needs to be performed before the symbol with the index of 5, for example, channel listening may be performed based on the symbols #0 to 5, and the result of listening is expected to be that one of the symbols with the indexes of 0 to 5 is the starting symbol of the idle channel.

That is, in the embodiment of the present application, when performing channel sensing, not only the number of symbols occupied by the first downlink data channel, but also the number of symbols occupied by the first downlink control channel for scheduling the first downlink data channel, the position relationship between the first downlink data channel and the first downlink control channel (for example, whether there is a symbol between the first downlink data channel and the first downlink control channel), the multiplexing relationship (for example, whether frequency division multiplexing or time division multiplexing), and the like may be considered.

Optionally, in this embodiment of the present application, the first downlink data channel may be a first downlink data channel that is sent after channel sensing in the current time slot is successful.

Optionally, in this embodiment of the present application, the network device may expect to send more than one downlink data channel in one time slot after the channel sensing is successful (that is, send the second downlink data channel mentioned below in this time slot as well), at this time, when performing channel sensing, the number of symbols occupied by the first downlink data channel may be based on, and the number of symbols occupied by the second downlink data channel may be further considered.

For example, taking the scheduling manner of type B as an example, the number of symbols that the PDSCH may occupy may be 2,4 and 7, and assuming that the network device expects to transmit at least one PDSCH occupying 7 symbols, and the PDSCH and the PDCCH may be frequency division multiplexed, the transmission of the PDCCH and/or PDSCH may be started at any of

symbols #

0,3,5,7, and thus the network device expects to detect that the channel is idle at any of

symbols #

0,3,5,7, and therefore, as shown in fig. 4, the network device may sequentially perform channel sensing based on

symbols #

0,3,5 and 7 until the channel is detected to be idle.

As shown in fig. 4, assuming that channel idle is sensed at symbol #0, two PDSCHs occupying 7 symbols may be transmitted, assuming that channel idle is sensed at symbol #3, one PDSCH occupying 7 symbols and one PDSCH occupying 4 symbols may be transmitted, assuming that channel idle is sensed at symbol #5, one PDSCH occupying 7 symbols and one PDSCH occupying 2 symbols may be transmitted, and assuming that channel idle is sensed at symbol #7, one PDSCH occupying 7 symbols may be transmitted.

Fig. 4 illustrates an example where PDSCH and PDCCH are frequency division multiplexed, if PDSCH and PDCCH are assumed to be time division multiplexed and symbols of PDSCH and PDCCH are consecutive, and still taking the type B scheduling manner as an example, the number of symbols that PDSCH can occupy may be 2,4 and 7, assuming that the network device desires to transmit at least one PDSCH that occupies 7 symbols, and PDSCH and PDCCH may be frequency division multiplexed, then PDCCH transmission may be started at any of

symbols #

1,5, and thus the network device desires to monitor channel idle at any of

symbols #

1,5. Assuming that channel idle is sensed at symbol #0, a PDCCH for scheduling a PDSCH of 7 symbols and a PDSCH of 7 symbols occupying 2 symbols, and a PDCCH for scheduling a PDSCH of 2 symbols occupying 2 symbols and a PDSCH of 2 symbols may be transmitted. Assuming that channel idle is sensed at symbol #5, a PDCCH for scheduling a PDSCH of 7 symbols occupying 2 symbols and a PDSCH of 7 symbols may be transmitted.

Optionally, in this embodiment of the present application, in addition to the position where the network device performs channel sensing according to the number of symbols occupied by the first downlink data channel, the position where the channel sensing is performed may be further determined according to the remaining number of symbols of the current time slot, that is, it is required to ensure that the remaining number of symbols is sufficient to send one downlink data channel and the downlink control channel corresponding to the downlink data channel.

For example, if the number of symbols occupied by the first downlink data channel and the first downlink control channel is 7 and the number of symbols currently remaining is 8, channel sensing needs to be performed based on symbol 7.

For example, if the number of symbols occupied by the first downlink data channel and the first downlink control channel is 7 and the number of symbols remaining currently is 10, channel sensing needs to be performed based on symbol 5 and symbol 7.

Optionally, in this embodiment of the present application, the symbol monitored for channel idleness may be equal to a starting symbol in symbols for transmitting the first downlink control channel and the first downlink data channel, where the symbols occupied by the first downlink data channel and the first downlink control channel mentioned herein may be both occupied symbols in total, and the first downlink data channel and the first downlink control channel may be frequency division multiplexed or time division multiplexed.

Specifically, taking the example shown in fig. 4 as an example, assuming that any one of the

symbols #

0,3,5 or 7 is expected to be the starting symbol in the symbols for transmitting the PDCCH and the PDSCH, any one of the

symbols #

0,3,5 or 7 may be a symbol in which the channel is monitored to be idle, that is, from any one of the

symbols #

0,3,5 or 7, it is determined that the channel is idle.

Optionally, in this embodiment, the symbol in which the channel is monitored to be idle may be earlier than a starting symbol in the symbols for transmitting the first downlink control channel and the first downlink data channel.

For example, as shown in fig. 5, assuming that the symbol #3 is expected to be the starting symbol among symbols for transmitting the PDCCH and the PDSCH, a symbol for which channel idle is monitored may be earlier than the symbol #3, for example, at the symbol # 2.

Optionally, in this embodiment of the present application, in a case that a symbol in which a channel is monitored to be idle is earlier than a starting symbol in symbols in which the first downlink data channel and the first downlink control channel are transmitted, the network may transmit an occupancy signal or a reference signal from the symbol in which the channel is monitored to a last symbol before the starting symbol.

For example, as shown in fig. 5, symbol #3 is a starting symbol for transmitting a PDSCH of 7 symbols and a PDSCH of 4 symbols, and if a channel is sensed to be idle at symbol #2, a placeholder signal may be transmitted at symbol 3.

In this case, the position for performing channel detection can be more flexible, and the probability of occupying the channel by the network device can be improved because the channel detection is more flexible.

The Reference Signal mentioned in the embodiments of the present application may be a demodulation Reference Signal (DMRS) or a Channel State Information Reference Signal (CSI-RS).

Optionally, in this embodiment of the present application, after the first downlink data channel and the first downlink control channel are sent in the timeslot, a certain number of symbols may still remain, and then the second downlink control channel and the second downlink data channel, and/or the reference signal and/or the occupancy signal may be sent on the remaining symbols.

Specifically, the network device may determine, according to the number of remaining symbols in the timeslot, the type, the number, and/or the occupied number of symbols of a channel or a signal to be sent on the remaining symbols, where the remaining symbols are the remaining symbols after the first downlink control channel and the first downlink data channel are sent in the timeslot; and performing downlink transmission according to the determined type, number and/or occupied symbol number.

In one implementation, the reference signal or the placeholder signal may be transmitted in case the number of remaining symbols is not sufficient to transmit the further downlink data channel and the further downlink control channel.

In another implementation, in a case that the number of remaining symbols may send at least one downlink data channel and a downlink control channel corresponding thereto, the at least one downlink data channel and the downlink control channel corresponding thereto may be sent.

Optionally, in this embodiment of the present application, the number of symbols occupied by the reference signal is not enough to transmit a complete downlink data channel and a complete downlink control channel.

Specifically, if the number of symbols remaining in the time slot is not enough to retransmit a complete downlink control channel and its scheduled downlink data channel after at least one downlink data channel (for example, the first downlink data channel may be included, and further includes a second downlink data channel) and its corresponding downlink control channel are transmitted, the reference signal may be transmitted.

Optionally, in this embodiment of the application, the second downlink data channel is a downlink data channel that occupies the largest number of symbols in the downlink data channels that can be sent in the remaining symbols.

Specifically, the downlink data channel occupying the largest number of symbols, that is, the PDSCH is transmitted as little as possible, among the remaining symbols.

For example, taking the scheduling method of type B as an example, if a channel is obtained at symbol 3 and the first 7 symbols are used for transmitting the PDSCH prepared in advance and the PDCCH frequency-division multiplexed with the PDSCH, one PDSCH occupying 4 symbols is transmitted as far as possible for the remaining 4 symbols, and two PDSCHs occupying 2 symbols are not transmitted, so that the number of times that the terminal device blindly detects the PDCCH corresponding to the PDSCH can be reduced.

Optionally, in this embodiment of the present application, in the process of transmitting the first downlink data channel and the first downlink control channel, channels or signals transmitted on the remaining symbols are prepared.

For example, the network device may prepare data of a next PDSCH in the course of transmitting a PDSCH occupying 7 symbols. E.g., at symbol #3, the network device may prepare a PDSCH occupying 4 symbols when transmitting a PDSCH occupying 7 symbols.

In 220, when it is monitored that the channel is idle, the network device sends a first downlink control channel and the first downlink data channel for scheduling the first downlink data channel.

In 230, the terminal device detects the first downlink control channel in the timeslot; wherein a location within the timeslot at which the first downlink control channel is detected is determined based on at least one of: the number of symbols occupied by the first downlink data channel scheduled by the first downlink control channel in the time slot, and the number of currently remaining symbols in the time slot.

Specifically, the terminal device may perform blind detection on the first downlink control channel according to the number of symbols occupied by the first downlink data channel.

For example, assuming that the first downlink data channel is frequency division multiplexed with the first uplink control channel and the number of occupied symbols is 7, the terminal device may perform blind detection at symbols #0 to #6 in sequence. And once the PDCCH is detected, the next blind detection position is +7 symbols of the previous PDCCH detected.

Optionally, similar to the location where the network device performs LBT, the location of the terminal device blindly detecting PDCCH may further consider at least one of the following:

the number of symbols occupied by the second downlink data channel, the position relationship and/or multiplexing relationship between the downlink data channel and the corresponding downlink control channel, and the number of the remaining symbols of the current time slot.

For example, assuming that the first downlink data channel is frequency division multiplexed with the first downlink control channel, the second downlink data channel is frequency division multiplexed with the second downlink control channel, the number of symbols occupied by the first downlink data channel is 7, and the number of symbols occupied by the second downlink data channel is 2 or 7, where the first downlink data channel may or may not be transmitted, the positions of the terminal device for blind detection of the PDCCH are symbol #0, symbol #3, symbol #5, and symbol #7. Once the PDCCH is blind-detected at the position, the blind-detection position of the next PDCCH is +7 symbols at the position.

Optionally, in this embodiment of the present application, the terminal device may determine the position for blindly detecting the first downlink control channel according to the remaining number of symbols.

For example, if the number of symbols occupied by the first downlink data channel and the first downlink control channel is 7 and the number of symbols remaining currently is 8, blind detection needs to be performed based on the symbol 7.

For example, if the number of symbols occupied by the first downlink data channel and the first downlink control channel is 7 and the number of symbols remaining currently is 10, blind detection needs to be performed based on symbol 5 and symbol 7.

In the embodiment of the present application, the terminal device may also perform blind detection based on the number of remaining symbols, rather than based on the number occupied by the first downlink data channel.

In 240, when the first downlink control channel is detected, the terminal device acquires the first downlink data channel scheduled by the first downlink control channel in the time slot.

Optionally, in this embodiment of the present application, after acquiring the first downlink control channel and the first downlink data channel, the terminal device detects other channels or signals in the remaining symbols of the timeslot.

Optionally, in this embodiment of the present application, the other channels or signals include:

a second downlink control channel and a second downlink data channel scheduled by the second downlink control channel; and/or, a reference signal.

Therefore, in the embodiment of the present application, according to the number of symbols occupied by the first downlink data channel to be transmitted in the time slot, channel monitoring is performed, when it is monitored that the channel is idle, the first downlink control channel of the first downlink data channel and the first downlink data channel are transmitted and scheduled, which can avoid performing channel monitoring operation on all symbols in the time slot, and because the position of channel monitoring is associated with the number of symbols occupied by the transmitted downlink data channel, it can avoid that more parts of downlink data need to be prepared due to the uncertainty of the position where channel monitoring succeeds, and it can avoid that the terminal device needs to perform more times of blind detection on the first downlink control channel due to the uncertainty of the position occupied by the first downlink control channel, thereby reducing the processing burden of the network device and reducing the overhead of blind detection of the terminal device.

Furthermore, the downlink data channel in the embodiment of the present application may be a downlink data channel based on a scheduling manner of type B, and may not modify the transmission format of the PDSCH of type B.

And furthermore, channel detection or downlink control channel detection is carried out based on the number of symbols occupied by the downlink data channel, the position of blind detection of the terminal equipment does not need to be configured, and signaling overhead can be saved.

Fig. 6 is a schematic block diagram of a wireless communication method 300 for unlicensed spectrum according to an embodiment of the present application. The method 300 includes at least some of the following.

In 310, channel detection is performed in sequence based on at least one candidate time domain position configured to the terminal device in the time slot until a channel idle is detected.

Optionally, the candidate time domain position in the embodiment of the present application may be an initial position of the terminal device for performing blind detection on the downlink control channel, where each candidate time domain position corresponds to one symbol. The candidate time domain position in the embodiment of the present application may be referred to as a PDCCH blind detection start position.

The network device may configure to the terminal device which symbols in the time slot are symbols for performing blind detection of the downlink control channel, and the terminal device may perform blind detection on these positions in sequence until the PDCCH is detected. Wherein the network device may configure the at least one candidate time domain location through RRC signaling.

For example, as shown in fig. 7, the potential PDCCH blind detection start location of the UE is configured by the gNB, for example, every two OSs may be used as potential locations of one blind detection PDCCH. For example, as shown in fig. 8, the gNB configures 7 potential PDCCH blind detection start positions.

In 320, the network device sends a first downlink control channel and a first downlink data channel scheduled by the first downlink control channel from a first candidate time domain position when the channel is detected to be idle based on the first candidate time domain position.

For example, if the gNB acquires a channel at any one of the potential PDCCH blind detection start positions, the PDSCH is transmitted according to the pre-prepared data. For example, as shown in fig. 8, if the gNB preempts the channel in the 4 th symbol, a PDSCH with a length of 7 symbols is transmitted from the 4 th symbol, and the PDSCH is a PDSCH prepared in advance.

Optionally, in this embodiment of the present application, when the monitored symbol of the channel being idle is earlier than the first candidate time domain position, the network device sends a placeholder signal or a reference signal from the monitored symbol of the channel being idle to a last symbol before the first candidate time domain position.

Optionally, in this embodiment of the present application, the network device determines, according to the number of remaining symbols in the timeslot, the type, the number, and/or the number of occupied symbols of a channel or a signal to be sent on the remaining symbols, where the remaining symbols are the remaining symbols after the first downlink control channel and the first downlink data channel are sent in the timeslot; and performing downlink transmission according to the determined type, number and/or occupied symbol number.

Optionally, in this embodiment of the present application, the channels or signals transmitted on the remaining symbols include: a second downlink control channel and a second downlink data channel scheduled by the second downlink control channel; and/or, a reference signal.

For example, for the remaining symbols, the number of these remaining symbols may not be able to transmit PDSCH of any one length, in which case the gNB transmits PDSCH of the longest length that can be supported on the remaining symbols, and if there is remaining OS, some reference signals, such as DM-RS, or CSI-RS, are transmitted.

For example, as shown in fig. 9, if the gNB acquires a channel in the 4 th symbol, a PDSCH with a length of 7 symbols is transmitted, and the PDSCH is a PDSCH prepared in advance. For the remaining 3 symbols, since the typeB PDSCH can not be transmitted on any one length PDSCH, one PDSCH of length 2 symbols is transmitted, and for the remaining one symbol, a reference signal, such as DMRS or CSI-RS, may be transmitted.

In 330, the detection of the first downlink control channel is performed sequentially at least one candidate time domain position configured by the network device in the time slot until the first downlink control channel is detected.

In 340, when the first downlink control channel is detected, the first downlink data channel scheduled by the first downlink control channel is acquired in the time slot.

Wherein the other channels or signals optionally include: a second downlink control channel and a second downlink data channel scheduled by the second downlink control channel; and/or, a reference signal.

Therefore, in the embodiment of the present application, the network device sequentially performs channel detection based on at least one candidate time domain position configured to the terminal device in the time slot until detecting that the channel is idle; under the condition that the channel is detected to be idle based on the first candidate time domain position, the first downlink control channel and the first downlink data channel scheduled by the first downlink control channel are sent from the first candidate time domain position, so that the network equipment can configure the candidate time domain position for blind detection of the downlink control channel, and the blind detection of the downlink control channel can be more flexible. If more candidate time domain positions are needed, more candidate time domain positions can be configured, so that the terminal equipment can blindly detect the downlink control channel at more candidate time domain positions, and the use probability of the channel is improved.

Fig. 10 is a schematic block diagram of a network device 400 for unlicensed spectrum according to an embodiment of the present application. The network device 400 comprises a communication unit 410 and optionally a processing unit 420.

The communication unit 410 is configured to: executing channel monitoring according to the number of symbols occupied by a first downlink data channel to be transmitted in a time slot; and when monitoring that the channels are idle, sending and scheduling a first downlink control channel and a first downlink data channel of the first downlink data channel.

Optionally, in this embodiment of the present application, the processing unit 420 is configured to: determining the symbol position for executing the channel monitoring in the time slot according to the symbol number occupied by the first downlink data channel; the communication unit 410 is further configured to: performing the channel monitoring according to the determined symbol position.

Optionally, in this embodiment of the present application, the symbol in which the channel is monitored to be idle is equal to a starting symbol in the symbols for transmitting the first downlink control channel and the first downlink data channel; or, the symbol in which the channel is monitored to be idle is earlier than the initial symbol in the symbols for sending the first downlink control channel and the first downlink data channel.

Optionally, in this embodiment of the present application, in a case that a symbol that a channel is idle is monitored to be earlier than the starting symbol, the communication unit 410 is further configured to: and transmitting an occupancy signal and/or a reference signal from the symbol where the channel is monitored to be idle to the last symbol before the starting symbol.

Optionally, in this embodiment of the present application, the processing unit 420 is configured to: determining the type and the number of channels or signals to be sent on the remaining symbols and/or the number of occupied symbols according to the number of the remaining symbols in the time slot, wherein the remaining symbols are the remaining symbols after the first downlink control channel and the first downlink data channel are sent in the time slot; the communication unit 410 is further configured to: and performing downlink transmission according to the determined type, number and/or occupied symbol number.

Optionally, in this embodiment of the present application, the channels or signals transmitted on the remaining symbols include:

a second downlink control channel and a second downlink data channel scheduled by the second downlink control channel; and/or, a reference signal; and/or an occupancy signal.

Optionally, in this embodiment of the present application, the processing unit 420 is configured to: preparing channels or signals to be transmitted on the remaining symbols in a process of transmitting the first downlink data channel and the first downlink control channel.

It should be understood that the network device 400 can implement the operations implemented by the network device in the method 200, and therefore, the description thereof is omitted for brevity.

Optionally, in this embodiment of the present application, the communication unit 410 is configured to: sequentially carrying out channel detection based on at least one candidate time domain position configured to the terminal equipment in the time slot until the channel is detected to be idle; and under the condition that the channel is detected to be idle based on the first candidate time domain position, transmitting a first downlink control channel and a first downlink data channel scheduled by the first downlink control channel from the first candidate time domain position.

Optionally, in this embodiment of the present application, in a case that a symbol that a channel is idle is monitored to be earlier than the first candidate time domain position, the communication unit 410 is further configured to: and transmitting a reference signal and/or an occupancy signal from the symbol with the monitored channel idle to the last symbol before the first candidate time domain position.

Optionally, in this embodiment of the present application, the processing unit 420 is configured to: determining the type, the number and/or the occupied symbol number of channels or signals to be sent on the remaining symbols according to the number of the remaining symbols in the time slot, wherein the remaining symbols are the remaining symbols after the first downlink control channel and the first downlink data channel are sent in the time slot; the communication unit 410 is further configured to: and performing downlink transmission according to the determined type, number and/or occupied symbol number.

Optionally, in this embodiment of the present application, the channels or signals transmitted on the remaining symbols include: a second downlink control channel and a second downlink data channel scheduled by the second downlink control channel; and/or, a reference signal; and/or an occupancy signal.

It should be understood that the network device 400 can implement the operations implemented by the network device in the method 300, and therefore, the description thereof is omitted for brevity.

Fig. 11 is a schematic block diagram of a terminal device 500 for unlicensed spectrum according to an embodiment of the present application. The terminal device 500 includes a communication unit 510.

Optionally, in this embodiment of the present application, the communication unit 510 is configured to: detecting a first downlink control channel in a time slot; wherein the location within the timeslot at which the first downlink control channel is detected is determined according to: the number of symbols occupied by the first downlink data channel scheduled by the first downlink control channel in the time slot; and under the condition that the first downlink control channel is detected, acquiring the first downlink data channel scheduled by the first downlink control channel in the time slot.

Optionally, in this embodiment of the present application, the communication unit 510 is further configured to: and after the first downlink control channel and the first downlink data channel are acquired, detecting other channels or signals in the rest symbols of the time slot.

Optionally, in this embodiment of the present application, the other channels or signals include: a second downlink control channel and a second downlink data channel scheduled by the second downlink control channel; and/or, a reference signal; and/or an occupancy signal.

Optionally, in this embodiment of the present application, the second downlink data channel is: and in the remaining symbols after the first downlink control channel and the first downlink data channel are sent, the downlink data channel which occupies the largest number of symbols in the downlink data channel and can be sent is obtained.

It should be understood that the terminal device 500 may implement the corresponding operations implemented by the terminal device in the method 200, and for brevity, the description is omitted here.

Optionally, in this embodiment of the present application, the communication unit 510 is configured to: sequentially detecting a first downlink control channel at least one candidate time domain position configured by the network equipment in a time slot until the first downlink control channel is detected;

and under the condition that the first downlink control channel is detected, acquiring the first downlink data channel scheduled by the first downlink control channel in the time slot.

Optionally, in this embodiment of the present application, the communication unit 510 is further configured to:

and after the first downlink control channel and the first downlink data channel are acquired, detecting other channels or signals in the rest symbols of the time slot.

It should be understood that the terminal device 500 may implement the corresponding operations implemented by the terminal device in the method 300, and for brevity, the description is omitted here.

Fig. 12 is a schematic structural diagram of a communication device 600 according to an embodiment of the present application. The communication device 600 shown in fig. 12 includes a processor 610, and the processor 610 can 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. 12, the communication device 600 may further include a memory 620. From the memory 620, the processor 610 may call and run a computer program to implement the method in the embodiment of the present 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. 12, 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 specifically, may transmit information or data to the other devices or receive information or data transmitted by the other devices.

The transceiver 630 may include a transmitter and a receiver, among others. The transceiver 630 may further include one or more antennas.

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

Optionally, the communication device 600 may specifically be a mobile terminal/terminal device according to this embodiment, and the communication device 600 may implement a corresponding process implemented by the mobile terminal/terminal device in each method according to this embodiment, which is not described herein again for brevity.

Fig. 13 is a schematic structural diagram 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 can 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, the chip 700 may further include a memory 720. From the memory 720, the processor 710 can call and run a computer program to implement the method in the embodiment of the present application.

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 further 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 transmitted 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 the other devices or chips.

Optionally, the chip may be applied to the network device in the embodiment of the present application, and the chip may implement the corresponding process implemented by the network device in each method in the embodiment of the present application, and for brevity, details are not described here again.

Optionally, the chip may be applied to the mobile terminal/terminal device in the embodiment of the present application, and the chip may implement the corresponding process implemented by the mobile terminal/terminal device in each method in the embodiment of the present application, and for brevity, no further description is given here.

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

Fig. 14 is a schematic block diagram of a communication system 14 according to an embodiment of the present application. As shown in fig. 14, the communication system 800 includes a terminal device 810 and a network device 820.

The terminal device 810 may be configured to implement the corresponding function implemented by the terminal device in the foregoing method, and the network device 820 may be configured to implement the corresponding function implemented by the network device in the foregoing method, which is not described herein again for brevity.

It should be understood that the processor of the embodiments 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 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, or discrete hardware components. The various methods, steps, and logic blocks disclosed 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 directly implemented by a hardware decoding processor, or implemented by a combination of hardware and software modules in the decoding processor. The software modules may be located in ram, flash, rom, prom, or eprom, registers, etc. 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 the embodiments of the subject application can be either volatile memory or nonvolatile memory, or can 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, and not limitation, many forms of RAM are available, such as Static Random Access Memory (SRAM), dynamic Random Access Memory (DRAM), synchronous Dynamic Random Access Memory (SDRAM), double Data Rate Synchronous Dynamic random access memory (DDR SDRAM), enhanced Synchronous SDRAM (ESDRAM), synchronous Link DRAM (SLDRAM), and Direct Rambus 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 memories are exemplary but not limiting illustrations, for example, the memories in the embodiments of the present application may also be Static Random Access Memory (SRAM), dynamic random access memory (dynamic RAM, DRAM), synchronous Dynamic Random Access Memory (SDRAM), double data rate SDRAM (DDR SDRAM), enhanced SDRAM (enhanced SDRAM, ESDRAM), synchronous Link DRAM (SLDRAM), direct Rambus RAM (DR RAM), and the like. That is, the memory in the 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 the computer program.

Optionally, the computer-readable storage medium may be applied to the network device in the embodiment of the present application, and the computer program enables the computer to execute the corresponding process implemented by the network device in each method in the embodiment of the present application, which is not described herein again for brevity.

Optionally, the computer-readable storage medium may be applied to the mobile terminal/terminal device in the embodiment of the present application, and the computer program enables the computer to execute the corresponding process implemented by the mobile terminal/terminal device in each method in the embodiment of the present application, which is not described herein again for brevity.

Embodiments of the present application also provide a computer program product comprising computer program instructions.

Optionally, the computer program product may be applied to the network device in the embodiment of the present application, and the computer program instructions enable the computer to execute corresponding processes implemented by the network device in the methods in the embodiment of the present application, which are not described herein again for brevity.

Optionally, the computer program product may be applied to the mobile terminal/terminal device in the embodiment of the present application, and the computer program instructions enable the computer to execute the corresponding processes implemented by the mobile terminal/terminal device in the methods in the embodiment of the present application, which are not described herein again for brevity.

The embodiment of the application also provides a computer program.

Optionally, the computer program may be applied to the network device in the embodiment of the present application, and when the computer program runs on a computer, the computer is enabled to execute the corresponding process implemented by the network device in each method in the embodiment of the present application, and for brevity, details are not described here again.

Optionally, the computer program may be applied to the mobile terminal/terminal device in the embodiment of the present application, and when the computer program runs on a computer, the computer is enabled to execute the corresponding process implemented by the mobile terminal/terminal device in each method in the embodiment of the present application, which is not described herein again 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 implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.

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

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

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

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

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

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

Claims

1. A method of wireless communication for unlicensed spectrum, comprising:

determining a symbol position for executing the channel monitoring in a time slot according to at least one of the number of symbols occupied by a first downlink data channel to be transmitted, the number of symbols occupied by a first downlink control channel for scheduling the first downlink data channel, the position relationship between the first downlink data channel and the first downlink control channel, the multiplexing relationship between the first downlink data channel and the first downlink control channel, and the number of remaining symbols in the time slot;

performing the channel monitoring according to the determined symbol position;

and when monitoring that the channels are idle, sending the first downlink control channel and the first downlink data channel.

2. The method of claim 1, wherein a symbol in which channel idle is monitored is equal to a starting symbol among symbols in which the first downlink control channel and the first downlink data channel are transmitted; or the like, or, alternatively,

the symbols for which channel idle is monitored are earlier than the starting symbols in the symbols for which the first downlink control channel and the first downlink data channel are transmitted.

3. The method of claim 2, wherein in the event that a symbol for which a channel is monitored to be idle is earlier than the starting symbol, the method further comprises:

and transmitting an occupancy signal and/or a reference signal from the symbol with the monitored channel idle to the last symbol before the starting symbol.

4. The method of claim 1, further comprising:

determining the type, the number and/or the occupied symbol number of channels or signals to be sent on the remaining symbols according to the number of the remaining symbols in the time slot, wherein the remaining symbols are the remaining symbols after the first downlink control channel and the first downlink data channel are sent in the time slot;

and performing downlink transmission according to the determined type, number and/or occupied symbol number.

5. The method of claim 4, wherein the channels or signals transmitted on the remaining symbols comprise:

a second downlink control channel and a second downlink data channel scheduled by the second downlink control channel; and/or the presence of a gas in the gas,

a reference signal; and/or the presence of a gas in the atmosphere,

an occupancy signal.

6. The method of claim 5, wherein the reference signal occupies insufficient symbols to transmit a complete downlink data channel and a complete downlink control channel.

7. The method of claim 5, wherein the second downlink data channel is a downlink data channel with a largest number of occupied symbols of the downlink data channels capable of being transmitted among the remaining symbols.

8. The method according to any one of claims 4 to 7, further comprising:

preparing channels or signals to be transmitted on the remaining symbols in a process of transmitting the first downlink data channel and the first downlink control channel.

9. A method of wireless communication for unlicensed spectrum, comprising:

detecting a first downlink control channel in a time slot;

wherein the location within the timeslot at which the first downlink control channel is detected is determined according to at least one of: the number of symbols occupied by a first downlink data channel scheduled by the first downlink control channel in the time slot, the position relationship between the first downlink data channel and the first downlink control channel, the multiplexing relationship between the first downlink data channel and the first downlink control channel, and the number of remaining symbols in the time slot;

10. The method of claim 9, further comprising:

11. The method of claim 10, wherein the other channels or signals comprise:

a reference signal; and/or the presence of a gas in the gas,

an occupancy signal.

12. The method of claim 11, wherein the reference signal occupies insufficient symbols to transmit a complete downlink data channel and a complete downlink control channel.

13. The method according to claim 11 or 12, wherein the second downlink data channel is: and in the remaining symbols after the first downlink control channel and the first downlink data channel are sent, the downlink data channel which occupies the largest number of symbols in the downlink data channel and can be sent is obtained.

14. A network device for unlicensed spectrum, comprising a processing unit and a communication unit, the processing unit to:

the communication unit is used for performing the channel monitoring according to the determined symbol position;

the communication unit is further configured to send the first downlink control channel and the first downlink data channel when it is monitored that the channels are idle.

15. The network device of claim 14, wherein a symbol for which channel idle is monitored is equal to a starting symbol of symbols for which the first downlink control channel and the first downlink data channel are transmitted; or the like, or, alternatively,

16. The network device of claim 15, wherein in case that a symbol for which a channel is monitored to be idle is earlier than the starting symbol, the communication unit is configured to:

and transmitting an occupancy signal and/or a reference signal from the symbol where the channel is monitored to be idle to the last symbol before the starting symbol.

17. The network device of claim 14, wherein the processing unit is configured to:

the communication unit is configured to: and performing downlink transmission according to the determined type, number and/or occupied symbol number.

18. The network device of claim 17, wherein the channels or signals transmitted on the remaining symbols comprise:

a reference signal; and/or the presence of a gas in the gas,

an occupancy signal.

19. The network device of claim 18, wherein the reference signal occupies insufficient symbols to transmit a complete downlink data channel and a complete downlink control channel.

20. The network device of claim 18, wherein the second downlink data channel is a downlink data channel with a largest number of occupied symbols of the downlink data channels that can be transmitted among the remaining symbols.

21. The network device according to any of claims 14 to 20, wherein the processing unit is configured to:

preparing channels or signals transmitted on the remaining symbols in a process of transmitting the first downlink data channel and the first downlink control channel.

22. A terminal device for unlicensed spectrum, comprising a communication unit configured to:

detecting a first downlink control channel in a time slot;

wherein a location within the timeslot at which the first downlink control channel is detected is determined based on at least one of: the number of symbols occupied by a first downlink data channel scheduled by the first downlink control channel in the time slot, the position relationship between the first downlink data channel and the first downlink control channel, the multiplexing relationship between the first downlink data channel and the first downlink control channel, and the number of remaining symbols in the time slot;

23. The terminal device of claim 22, wherein the communication unit is further configured to:

24. The terminal device of claim 23, wherein the other channels or signals comprise:

a reference signal; and/or the presence of a gas in the gas,

an occupancy signal.

25. The terminal device of claim 24, wherein the reference signal occupies insufficient symbols to transmit a complete downlink data channel and a complete downlink control channel.

26. The terminal device of claim 24 or 25, wherein the second downlink data channel is: and in the remaining symbols after the first downlink control channel and the first downlink data channel are sent, the downlink data channel which occupies the largest number of symbols in the downlink data channel and can be sent is obtained.

27. A network device, comprising: a processor and a memory for storing a computer program, the processor being configured to invoke and execute the computer program stored in the memory to perform the method of any of claims 1 to 8.

28. A terminal device, comprising: a processor and a memory for storing a computer program, the processor being configured to invoke and execute the computer program stored in the memory to perform the method of any of claims 9 to 13.

29. A chip, comprising: a processor for calling and running a computer program from a memory so that a device on which the chip is installed performs the method of any one of claims 1 to 8.

30. A chip, comprising: a processor for calling and running a computer program from a memory so that a device on which the chip is installed performs the method of any one of claims 9 to 13.

31. A computer-readable storage medium for storing a computer program which causes a computer to perform the method of any one of claims 1 to 8.

32. A computer-readable storage medium for storing a computer program which causes a computer to perform the method of any one of claims 9 to 13.