CN109392176B

CN109392176B - Information sending method and related equipment

Info

Publication number: CN109392176B
Application number: CN201710690657.9A
Authority: CN
Inventors: 李�远; 官磊
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2017-08-11
Filing date: 2017-08-11
Publication date: 2021-07-09
Anticipated expiration: 2037-08-11
Also published as: WO2019029640A1; CN109392176A

Abstract

The embodiment of the application provides an information sending method and device. The method comprises the following steps: the method comprises the steps that a terminal device receives indication information, wherein the indication information is used for indicating that the interception type of channel interception performed on a first sub-band by the terminal device is a long interception type before first uplink information is sent, and indicating that the interception type of channel interception performed on a second sub-band by the terminal device is a short interception type before second uplink information is sent; executing first channel interception on a first sub-band and executing second channel interception on a second sub-band, wherein the first channel interception is channel interception of a short interception type, and the second channel interception is channel interception of a long interception type; and when the interception result of the first channel interception and the interception result of the second channel interception meet a first preset condition, sending first uplink information on the first sub-band. The method provided by the embodiment can be applied to communication systems, such as V2X, LTE-V, V2V, internet of vehicles, MTC, IoT, LTE-M, M2M, internet of things, and the like.

Description

Information sending method and related equipment

Technical Field

The present invention relates to the field of communications, and in particular, to an information sending method and related devices.

Background

Listen-Before-Talk (LBT) technology is an important ring in Unlicensed Frequency Bands (UFB) access technology. The LBT technique is as follows: before data transmission, the terminal device must perform channel sensing on the carrier to determine whether other devices are occupying the carrier for data transmission. If the carrier wave is successfully sensed by the terminal equipment, the terminal equipment can preempt the carrier wave for data transmission, and if the carrier wave is not successfully sensed by the terminal equipment, the terminal equipment cannot preempt the carrier wave for data transmission. After the carrier is occupied, the terminal device may continuously send information within a Maximum Channel Occupancy Time (MCOT). After the maximum channel occupation time is exceeded, the terminal device needs to actively release the carrier to be provided for other devices to use. After releasing the channel, the terminal device needs to perform LBT again to access the carrier again. The LBT technology can ensure friendly coexistence among a plurality of devices sharing the unlicensed frequency band, and reduce the probability of collision among the plurality of devices due to the occupation of the spectrum resources of the unlicensed frequency band.

However, the current LBT technology is not efficient in interception, especially when the communication system is busy, a large number of devices seize the channel, the probability of collision among the devices is greatly increased, which further reduces the interception efficiency of the terminal device, and the terminal device needs a long time to access the channel for data transmission.

Disclosure of Invention

The embodiment of the application provides information sending and related equipment, and the carrier sensing efficiency can be effectively improved.

In a first aspect, an information sending method is provided, including:

the method comprises the steps that terminal equipment receives indication information sent by network equipment, wherein the indication information is used for indicating that the interception type of channel interception performed on a first sub-band by the terminal equipment is a long interception type before first uplink information is sent, and indicating that the interception type of channel interception performed on a second sub-band by the terminal equipment is a short interception type before second uplink information is sent, the first channel interception is performed on the first uplink information, and the second channel interception is performed on the second uplink information;

the terminal equipment executes first channel interception on the first sub-band and executes second channel interception on a second sub-band, wherein the first channel interception is the channel interception of the short interception type, and the second channel interception is the channel interception of the long interception type;

and when the interception result of the first channel interception and the interception result of the second channel interception meet a first preset condition, the terminal equipment sends the first uplink information on the first sub-band.

With reference to the first aspect, in some possible embodiments, the first preset condition is that a sensing result of the first channel sensing is that channel sensing is successful, and a sensing result of the second channel sensing is that channel sensing is successful.

With reference to the first aspect, in some possible embodiments, when the sensing result of the second channel sensing is that channel sensing is successful, the terminal device sends the second uplink information on the second subband.

With reference to the first aspect, in some possible embodiments, an uplink grant or a common physical downlink control channel included in the indication information is used to indicate that, before the terminal device sends the first uplink information, a listening type of channel listening to the first subband is the long listening type.

With reference to the first aspect, in some possible embodiments, the uplink grant or the common physical downlink control channel included in the indication information is used to indicate that, before the terminal device sends the second uplink information, the listening type of channel listening to the second subband is the short listening type.

With reference to the first aspect, in some possible embodiments, the uplink grant or the common physical downlink control channel included in the indication information is used to indicate that, before the terminal device sends the third uplink information, the listening type of channel listening to the third subband is the short listening type.

With reference to the first aspect, in some possible embodiments, the terminal device performs third channel sensing on the second subband, where the third channel sensing is channel sensing of the short sensing type, and the third channel sensing is channel sensing performed on the second uplink information; and when the interception result of the third channel interception is that channel interception is successful, the terminal equipment sends the second uplink information on the second sub-band.

Specifically, when the listening result of the second channel listening is a channel listening failure, and the listening result of the third channel listening is a channel listening success, the terminal device sends the second uplink information on the second subband.

Further, when the listening result of the second channel listening is a channel listening failure and the listening result of the third channel listening is a channel listening success, the terminal device abandons sending the first uplink information on the first sub-band.

With reference to the first aspect, in some possible implementations, the first uplink information is uplink information that is sent by the terminal device and scheduled by the network device, the second uplink information is uplink information that is sent by the terminal device and scheduled by the network device, and a starting time of the first uplink information is the same as a starting time of the second uplink information.

With reference to the first aspect, in some possible embodiments, the long listening type channel listening is a random backoff idle channel evaluation; and the short interception type channel interception is single-time slot idle channel evaluation.

With reference to the first aspect, in some possible implementations, the first subband is a subband in which any listening type in a subband set is indicated as the long listening type by a network device, where the first subband and the second subband both belong to the subband set.

With reference to the first aspect, in some possible implementations, the terminal device determines the second subband to be a subband for performing the long listening type channel listening, where the second subband is a subband randomly selected or arbitrarily selected by the terminal device from a subband set, and both the first subband and the second subband belong to the subband set.

With reference to the first aspect, in some possible embodiments, when a handover listening type condition is satisfied between the first sub-band and the second sub-band, the terminal device performs the first channel listening on the first sub-band and performs the second channel listening on the second sub-band; wherein,

the handover listening type condition comprises at least one of: the channel congestion degree of the first sub-band is greater than that of the second sub-band; and the channel fading degree of the first sub-band is greater than the channel fading degree of the second sub-band.

With reference to the first aspect, in some possible embodiments, the indication information is further configured to indicate that, before the terminal device sends the third uplink information, an interception type of channel interception performed on a third subband is the short interception type;

the terminal device executes fourth channel sensing on the third sub-band, wherein the fourth channel sensing is channel sensing of the short sensing type;

and when the interception result of the fourth channel interception is that channel interception is successful, and the interception result of the second channel interception is that channel interception is successful, the terminal device sends the third uplink information on the third subband.

In a second aspect, an information transmitting apparatus is provided, which includes means for performing the method of any one of the first aspect.

In a third aspect, a terminal device, a memory, and a processor and a communication module coupled to the memory are provided, wherein: the communication module is configured to transmit or receive externally transmitted data, the memory is configured to store implementation code of the method according to any one of the first aspect, and the processor is configured to execute the program code stored in the memory, that is, execute the method according to any one of the first aspect.

In a fourth aspect, there is provided a computer readable storage medium storing a computer program which, when executed by a processor, implements the method of any one of the first aspects.

In a fifth aspect, a communication system is provided, which includes a network device and a terminal device, where the network device and the terminal device can communicate with each other, and the terminal device is the terminal device according to any one of the first aspect.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments or the background art of the present invention, the drawings required to be used in the embodiments or the background art of the present invention will be described below.

Fig. 1 is a schematic diagram of multi-carrier channel sensing provided by the prior art;

fig. 2 is a schematic diagram of another multicarrier channel sensing provided by the prior art;

fig. 3 is an interaction diagram of an information sending method according to an embodiment of the present application;

fig. 4 is a schematic diagram of multi-carrier channel sensing provided in an embodiment of the present application;

FIGS. 5A-5B are schematic diagrams of multi-carrier channel sensing before and after handover, respectively;

fig. 6 is a schematic diagram of another multicarrier channel sensing provided in the embodiment of the present application;

fig. 7 is a schematic diagram of a sensing manner for indicating a carrier in an implicit manner according to an embodiment of the present application;

fig. 8 is a schematic structural diagram of a terminal device according to an embodiment of the present application;

fig. 9 is a schematic structural diagram of an information transmitting apparatus according to an embodiment of the present application.

Detailed Description

To facilitate understanding of the embodiments of the present invention, the listening type of channel sensing related to the embodiments of the present invention is first introduced. In the embodiment of the application, the listening type of channel sensing may include: long listening type channel listening and short listening type channel listening.

The long sensing type channel sensing generally refers to channel sensing that takes a long time from the start of channel sensing to the success of channel sensing. In a specific embodiment, the long listening type Channel sensing may be a Random Backoff (Random Backoff) Clear Channel Assessment (CCA). The principle of the random backoff idle channel evaluation is as follows: the terminal equipment uniformly and randomly generates a backoff counter N between 0 and an initial Contention Window (CWS), carries out channel sensing on a carrier by taking a sensing time slot (for example, the duration is 9us) as granularity, decrements the backoff counter if the sensing time slot detects that a channel is idle, and suspends the backoff counter if the sensing time slot detects that the channel is busy, namely, the backoff counter N is kept unchanged in the busy time of the channel, and does not count the backoff counter again until the channel is idle. When the back-off counter returns to zero, the channel is considered to be successfully intercepted, and the terminal equipment can immediately occupy the channel to send the uplink information. In addition, the terminal device may also wait for a period of time without immediately sending the uplink information after the backoff counter is reset to zero, and after the end of the waiting, listen once again in an additional time slot before the time when the uplink information needs to be sent, and if the channel is listened to in the additional time slot to be idle, the channel sensing is considered to be successful, and the information can be sent immediately. If the outstanding back-off counter is reset to zero before the uplink message or the additional listening slot is busy, the channel sensing is said to fail. It is understood that the above-mentioned example is only an example, and in other embodiments, the long sensing type channel sensing may be other long-time channel sensing, and is not limited in detail herein.

The short sensing type channel sensing generally refers to channel sensing that takes a short time from the start of channel sensing to the success of channel sensing. In a specific embodiment, the short sensing type of channel sensing may be a single slot clear channel evaluation or referred to as a single shot (One shot) clear channel evaluation. The principle of the single-time-slot idle channel evaluation is as follows: the terminal equipment executes channel interception of a single time slot with the length of preset time (for example, the length of the preset time is 25us) once, if the terminal equipment detects that a channel is idle in the single time slot, the channel interception is considered to be successful, and the terminal equipment can immediately access the channel to send uplink information; and if the channel is detected to be busy, the terminal equipment gives up sending the uplink information, and the channel interception is called to fail. It is to be understood that, without being limited to the above idle channel evaluation manner, the short sensing type channel sensing may also be other channel sensing capable of sensing the carrier quickly, and is not limited herein. Moreover, the interception duration of channel interception is not limited to 25us, and may be more or less; the number of times of channel sensing is not limited to 1, and may be 2, 3 or more, and is not limited specifically herein.

In the embodiment of the present application, the channel status includes two types: channel free, channel busy. The judgment criterion of the channel state is as follows: the terminal equipment compares the power of the received carrier wave in the listening time slot with an Energy Detection threshold (CCA-ED, CCA-Energy Detection), if the power is higher than the Energy Detection threshold, the channel state is that the channel is busy, and if the power is lower than the Energy Detection threshold, the channel state is that the channel is idle.

It is understood that the channel sensing of the long sensing type is required to be successful only when the channel sensing results of the plurality of sensing time slots are all channel idle, and the channel sensing of the short sensing type is required to be successful only when the channel sensing result of the single time slot is channel idle, so that the reliability of the sensing result of the channel sensing of the long sensing type is greater than that of the channel sensing of the short sensing type, but the sensing success rate of the channel sensing of the long sensing type is less than that of the channel sensing of the short sensing type.

Before the terminal equipment sends uplink information to the network equipment by using the carrier, the terminal equipment may adopt long-interception type channel interception to perform channel interception on the carrier, and may also adopt short-interception type channel interception to perform channel interception on the carrier. The reason why the terminal device senses the carrier by using different types of channel sensing will be described in detail below. Before sending uplink information to a network device by using a carrier, a terminal device generally needs to perform channel sensing of a long sensing type on the carrier to ensure reliability of a sensing result. However, in a special case, the terminal device may perform channel sensing of the short sensing type before transmitting uplink information to the network device using the carrier. For example, if the downlink information sent by the network device after preempting the carrier does not occupy the maximum channel occupation time, the network device may not release the channel, but provide the remaining maximum channel occupation time for the terminal device to send the uplink information, so as to improve the opportunity of the terminal device to access the carrier. For example, the maximum channel occupation time is 8 milliseconds, and the time occupied by the network device for sending the downlink information is 2 milliseconds, the network device may share the remaining 6 milliseconds to the terminal device, that is, instruct the terminal device to use channel sensing of the short sensing type to access the channel before sending the uplink information in the remaining 6 milliseconds. For the terminal device, the network device has already executed the channel sensing of the long sensing type with higher reliability before preempting the carrier, so when the uplink information that the terminal device needs to send is within the remaining maximum channel occupation time provided by the shared network device, the carrier can be occupied to send the uplink information to the network device by only executing the channel sensing of the simple short sensing type. For uplink information exceeding the remaining maximum channel occupation time provided by the network device, the terminal device must perform long-sensing type channel sensing to ensure fair coexistence with other surrounding wireless nodes on the unlicensed spectrum.

To extend the available bandwidth, the 4Generation mobile communication technology (4G) introduced enhanced-authorized Access (eLAA) technology. The terminal device expands an available frequency spectrum from an authorized frequency band to an unauthorized frequency band through a Carrier Aggregation (CA) technology to send uplink information to the network device, thereby increasing the transmission speed of the uplink information. In the embodiment of the present application, uplink information transmission may be performed in units of subbands. Wherein the sub-band (e.g., the first sub-band, the second sub-band, or the third sub-band) is a segment of frequency domain resources for carrying uplink information. Optionally, the sub-band includes at least one subcarrier, or the sub-band includes at least one Physical Resource Block (PRB). Optionally, the sub-band is a frequency band corresponding to a bandwidth of 5MHz, 10MHz, or 20MHz, for example, the frequency band corresponds to a frequency domain range occupied by one carrier in the LTE system. Optionally, the subband is a carrier (e.g., the first subband is a first carrier, the second subband is a second carrier, and the third subband is a third carrier). It should be understood that the sub-bands may also be referred to as BandWidth slices (BWP). Optionally, the sub-band is a frequency domain unit for the terminal device to perform channel sensing, for example, when the terminal device performs LBT, the power detected in the sensing timeslot on the sub-band is used to compare with the CCA-ED corresponding to the sub-band to determine that the channel is busy or idle; for another example, the terminal device may occupy the subband to send uplink information (e.g., the first uplink information, the second uplink information, or the third uplink information) after performing LBT successfully on the subband. For convenience of presentation, the following description will be made by taking the example that the subband includes one subcarrier, for example, a first subband is referred to as a first carrier, a second subband is referred to as a second carrier, a third subband is referred to as a third carrier, and a subband set is referred to as a carrier set.

As shown in fig. 1, the terminal device performs carrier aggregation on carriers of two unlicensed frequency bands, i.e., a first carrier CC1 and a second carrier CC2, to send uplink information. For the first carrier CC1, the downlink information sent by the network device after preempting the carrier first carrier CC1 does not occupy the maximum downlink channel occupancy time, but the duration of the uplink information to be issued by the terminal device is longer than the remaining maximum downlink channel occupancy time, and the terminal device may not send the uplink information using the remaining maximum downlink channel occupancy time shared by the network device, so the terminal device must perform channel sensing of the long sensing type on the first carrier CC 1; for the second carrier CC2, the downlink information sent by the network device after preempting the second carrier CC2 occupies the maximum channel occupation time, and the network device has no remaining maximum channel occupation time to share and send the uplink information to the terminal device, so the terminal device needs to perform long sensing type channel sensing on the second carrier CC 2. The terminal device can successfully perform carrier aggregation to send uplink information only when channel sensing on both the first carrier CC1 and the second carrier CC2 is successful.

In the embodiment of the present application, the maximum channel occupying time may be determined according to a channel access Priority (Priority Class) of the terminal device. When the channel access priority of the terminal equipment is higher, the terminal equipment is easier to successfully preempt the carrier for data transmission, but the maximum channel occupation time of the terminal equipment is shorter, on the contrary, when the channel access priority of the terminal equipment is lower, the terminal equipment is harder to successfully preempt the carrier for data transmission, but the maximum channel occupation time of the terminal equipment is longer.

As shown in fig. 2, for the scenario shown in fig. 1, when a terminal device performs multi-carrier aggregation, it may perform multi-carrier channel sensing, and only need to perform long-sensing type channel sensing on a first carrier CC1 and perform aligned short-sensing type channel sensing on a second carrier CC 2. That is, the terminal device changes the second carrier CC2 from the long sensing type channel sensing to the short sensing type channel sensing to improve the sensing success rate of the terminal device. If the terminal device successfully senses both the first carrier CC1 and the second carrier CC2, the terminal device may send uplink information to the network device on the first carrier CC1 and the second carrier CC 2.

However, if the channel of the second carrier CC2 is relatively idle, but the channel of the first carrier CC1 is relatively congested, the channel sensing efficiency of the terminal device is also not high.

In order to solve the problems in the prior art, the application provides an information sending method and related equipment, which can effectively improve the interception efficiency of terminal equipment. Each will be described in detail below.

Fig. 3 is an interaction diagram of an information sending method according to an embodiment of the present application. As shown in fig. 3, the information sending method according to the embodiment of the present application includes the following steps:

s101: and the network equipment sends the indication information to the terminal equipment. Accordingly, the terminal device receives the indication information sent by the network device.

In this embodiment, the network device mainly refers to a relay device connected between an access network and a core network, that is, the network device sends uplink information received from the access network to the core network, and sends downlink information received from the core network to the access network. The network devices may generally include: macro base stations (Macro eNodeB/NodeB), micro base stations (micro eNodeB/NodeB), pico base stations, home base stations (home eNodeB/NodeB), distributed base stations, remote radio heads, and relays (Relay), etc., which are not particularly limited herein.

In this embodiment of the application, the terminal device is a logical entity, and may specifically be any one of a User Equipment (User Equipment) and an Internet of Things (IoT) device. The user Device may be a smart phone (smart phone), a smart watch (smart watch), a smart tablet, and the like, and the internet of things Device may be a Wearable Device (WD), a meter, an environment monitoring Device, and the like, which are not limited in this respect.

In this embodiment, the terminal device may access the network device through a Frequency Division Multiple Access (FDMA) technology. The frequency division multiple access technique includes: single-carrier Frequency-Division Multiple Access (SC-FDMA), Orthogonal Frequency Division Multiple Access (OFDMA), or other Frequency Division Multiple Access techniques, which are not specifically limited herein.

In this embodiment of the application, the indication information may be used to indicate that, before the terminal device sends the first uplink information, an interception type of channel interception performed on the first carrier is a long interception type, and indicate that, before the terminal device sends the second uplink information, an interception type of channel interception performed on the second carrier is the short interception type.

S102: and the terminal equipment executes first channel sensing on the first carrier wave and second channel sensing on the second carrier wave, wherein the first channel sensing is short sensing type channel sensing, and the second channel sensing is long sensing type channel sensing. It can also be understood that the first channel sensing is channel sensing performed for first uplink information, and the second channel sensing is channel sensing performed for second uplink information.

In an embodiment of the present application, the first carrier and the second carrier both belong to the carrier set. The carrier set is a set of carriers used by the terminal device when the terminal device performs carrier aggregation. It should be understood that the carrier set may also include other carriers besides the first carrier and the second carrier, for example, a third carrier, and so on. It should be understood that the carrier set specifically includes which carriers may be determined by the terminal device, and this embodiment is not limited thereto. For example, as shown in fig. 4, the carrier set includes 4 carriers, where CC1 is the second carrier, channel sensing using short sensing type is instructed by the network device and channel sensing actually performed by the long sensing type is performed, CC2 is the first carrier, channel sensing using long sensing type is instructed by the network device and channel sensing actually performed by the short sensing type is performed, and the carrier set further includes CC3 instructed by the network device to use channel sensing using long sensing type and CC4 (referred to as the third carrier) instructed by the network device to use channel sensing using short sensing type. In this embodiment, a carrier set including a first carrier and a second carrier is taken as an example for description, and in some implementation methods of this embodiment, the carrier set further includes a third carrier. However, in other embodiments, the first carrier may be replaced by a first subband, the second carrier may be replaced by a second subband, and the third carrier may be replaced by a third subband. The number of carriers in the carrier set may be other, for example, the carrier set may include only the first carrier and the second carrier, or the carrier set may include the fourth carrier, the fifth carrier, or more.

Further, the carrier set is a set of carriers used by the terminal device for multi-carrier channel sensing. When multi-carrier sensing is performed, the terminal device performs long sensing type channel sensing on one carrier in the carrier set, performs short sensing type channel sensing on other carriers, and when the channel sensing of the long sensing type carrier is successful and the channel sensing of the short sensing type carrier is successful, the terminal device can occupy the short sensing type carrier to send uplink information.

Optionally, the second carrier is a carrier randomly selected by the terminal device in a carrier set, that is, the second carrier may be a carrier in which any one of the sensing types in the carrier set is indicated by the network device as the long sensing type, or may be a carrier in which any one of the sensing types in the carrier set is indicated by the network device as the short sensing type. The terminal equipment selects a carrier wave for executing the long sensing type in a carrier wave set in a uniform and random mode, and the carrier wave which is selected to execute the long sensing type channel sensing is just the second carrier wave. Of course, it is also possible for the terminal device to select a carrier indicated to perform long sensing type channel sensing by means of such uniform random selection, but the present embodiment will be described only with respect to the case of just selecting the second carrier.

Optionally, the second carrier is a carrier arbitrarily selected by the terminal device in a carrier set. That is to say, which carrier in the carrier set is used by the terminal device as the second carrier to perform the long sensing type channel sensing is arbitrarily selected by the terminal device in the carrier set through a specific implementation algorithm, for example, a carrier with a smaller congestion degree or a carrier with a smaller channel fading degree in the carrier set may be selected, which is not limited in this embodiment.

After the terminal equipment selects the second carrier in the carrier set to execute the channel sensing of the long sensing type, the terminal equipment executes the channel sensing of the long sensing type, namely the second channel sensing, on the second carrier, and executes the channel sensing of the short sensing type, namely the first channel sensing, on the first carrier in the carrier set.

In this embodiment, the first carrier, the second carrier, and the third carrier are all carriers in an unlicensed frequency band. The unlicensed frequency band includes an available unlicensed frequency band and an unavailable licensed frequency band. Here, the unlicensed frequency band mainly refers to an available unlicensed frequency band. Available unlicensed frequency bands include: 2.3GHz band (europe), 3.5GHz band (usa), 2.4GHz band/5 GHz band/60 GHz band (global), and the like. It is understood that the available unlicensed frequency band is not absolutely constant, and as society and technology develop, the available unlicensed frequency band may also change due to re-planning, and the above-mentioned example of the available unlicensed frequency band is only an example, and is not particularly limited.

In the embodiment of the present application, in order to avoid mutual interference between carriers, the guard interval between carriers is usually set to 15KHZ, but as the frequency offset resistance is improved, the guard interval between carriers may be made smaller and smaller to improve the utilization efficiency of the frequency spectrum, and the above example of the guard interval between carriers is only an example, and is not particularly limited.

In this embodiment of the present application, the first uplink information is uplink information that is sent by the network device on the first carrier when the network device schedules the terminal device, and the second uplink information is uplink information that is sent by the network device on the second carrier when the network device schedules the terminal device. Wherein the start time of the first uplink information and the start time of the second uplink information are the same. That is, when channel sensing on the first carrier and the second carrier is successful, the terminal device starts transmitting uplink information at the same time on each carrier. It can be understood that both the transmitting filter and the receiving filter of the terminal device are non-ideal filters, and if the terminal device transmits information on one carrier and performs interception on another carrier in the same time unit, information on the carrier transmitting the information may leak to the carrier performing channel interception, so that the carrier performing channel interception cannot successfully intercept the information. Therefore, only when the starting time of the first uplink information and the second uplink information are the same, the situation that different carriers respectively execute information transmission and channel sensing at the same time does not occur, and the terminal equipment can successfully sense the first carrier and the second carrier at the same time and simultaneously start to transmit information. For example, the starting time of the first uplink information and the starting time of the second uplink information are both a starting boundary (Subframe boundary) of an uplink Subframe, a starting boundary of an uplink symbol, or a middle time of an uplink symbol, etc. The middle time of the uplink symbol may be 25us after the start boundary of the uplink symbol, or 25us + ta (timing advance) after the start boundary of the uplink symbol, or the like. It is to be understood that the intermediate time of the uplink symbol is not limited to the above example, and is not limited to the specific limitation here.

Optionally, the first uplink information is scheduling-free grant uplink transmission sent by the terminal device on the first carrier. It should be understood that for grant-free uplink transmission, the uplink information of the terminal device does not need to be scheduled by the network device, but is sent by the terminal device in an autonomous decision. Such a transmission scheme not requiring scheduling may be referred to as a Grant free UpLink (GUL) transmission scheme or a Grant less UpLink (AUL) transmission scheme. Different from scheduling of terminal equipment to send Uplink information by sending dynamic Uplink grant in Scheduling of Uplink (SUL) based on network equipment scheduling, the gu l radio resources for the gu l transmission, including time domain and/or frequency domain resources, are configured to the terminal equipment by the network equipment semi-statically. Specifically, the GUL radio resource is configured to the terminal device through RRC signaling and/or dynamic DCI signaling. Specifically, the GUL time domain resource is periodic, or the GUL time domain resource is persistent, and the uplink information scheduled based on the uplink grant is only effective for a limited number of time units. Specifically, when the terminal device sends the UpLink Information in the gu mode, the terminal device reports scheduling free admission UpLink Control Information (G-UCI), which is Control Information corresponding to the UpLink data. The G-UCI includes at least one of HARQ process number information of a HARQ process corresponding to the uplink information, New Data Indicator (NDI) information, Redundancy Version (RV) information corresponding to the uplink information, and user identification (denoted as UE ID) information of the terminal device. Similar to the case where the first uplink information and the second uplink information are both information that is sent by the terminal device on the first carrier by the network device scheduling, when the first uplink information is scheduling-free uplink transmission that is sent by the terminal device on the first carrier, the starting time of the first uplink information and the starting time of the second uplink information are the same, where the second uplink information may be scheduling-free uplink transmission or uplink transmission that is sent by the terminal device by the network device scheduling.

It should be understood that, when the first uplink information is scheduling-free uplink information that is sent by the terminal device on the first carrier, the terminal device does not need to receive indication information sent by the network device to indicate a listening type for channel sensing on the first carrier, or the network device does not need to send indication information to indicate a listening type for channel sensing on the first carrier to the terminal device, but may determine, by using a preset criterion, that the listening type for channel sensing on the first carrier is a long-sensing type. For example, before the terminal device sends the first uplink information in a scheduling grant free manner, the default rule is to use the long sensing type for channel sensing. It is to be understood that the preset criteria may be as specified by a protocol or regulation.

Optionally, the second uplink information is scheduling-free grant uplink transmission sent by the terminal device on the first carrier. Similarly, the starting time of the first uplink information and the starting time of the second uplink information are the same, where the first uplink information may be scheduling-free uplink transmission, or uplink transmission sent by a network device scheduling terminal device.

In this embodiment, the first uplink information may include at least one of the uplink data information, the pilot information, and the uplink control information. The first Uplink information may be carried in a Physical Uplink Shared Channel (PUSCH) or in a Physical Uplink Control Channel (PUCCH). Further, the first uplink information is uplink information scheduled by the network device through an uplink grant. The same is true for the second uplink information.

It should be understood that the terminal device occupies the channel immediately after the channel sensing performed for a certain carrier is successful, and sends the uplink information; or, the starting time of the uplink information is equal to the ending time of the channel sensing. That is, when the terminal device performs channel sensing on the carrier using a single-slot CCA, the uplink information is immediately followed by the sensing slot. When the terminal device uses the random backoff CCA to perform channel sensing on the second carrier, the last sensing time slot (the time slot in which the backoff counter is reset to zero, or the additional time slot after the backoff counter is reset to zero) is followed by the uplink information. The carrier may be a first carrier, a second carrier, or a third carrier; the uplink information may be first uplink information, second uplink information, or third uplink information.

S103: and the terminal equipment selects the first carrier and the second carrier to transmit the uplink information according to the sensing results of the first carrier and the second carrier. In the method, when the first carrier is specified as the long sensing type channel sensing by the network device and the second carrier is specified as the short sensing type channel sensing by the network device, the terminal device can execute the short sensing type channel sensing on the first carrier and the long sensing type channel sensing on the second carrier by randomly selecting the carriers or according to the channel practical conditions of the first carrier and the second carrier, thereby effectively improving the success rate of the terminal device in channel sensing. For example, when the first carrier is relatively congested and the second carrier is relatively idle, the channel sensing of the short sensing type is performed on the first carrier and the channel sensing of the long sensing type is performed on the second carrier by random selection (for example, if the second carrier is added to a carrier set for performing multi-carrier sensing and a carrier for performing long sensing type channel sensing is randomly selected, it is possible to select the idle second carrier for performing long sensing type channel sensing) or arbitrary selection, so as to improve the success rate of sensing.

As shown in fig. 5A, the indication information sent by the network device to the terminal device is used to indicate that the sensing type of channel sensing performed on the first carrier CC1 is the long sensing type and that the sensing type of channel sensing performed on the second carrier CC2 is the short sensing type. When the condition of switching the listening type is satisfied between the first carrier and the second carrier, corresponding to fig. 5A, the terminal device determines to perform channel sensing of the short listening type on the first carrier CC1 and perform channel sensing of the long listening type on the second carrier CC 2. The terminal device may select the first carrier CC1 and the second carrier CC2 for uplink information transmission according to the sensing results for the first carrier CC1 and the second carrier CC 2. Wherein the handover listening type condition comprises at least one of: the channel congestion level of the first carrier CC1 is greater than the channel congestion level of the second carrier CC 2; and the channel fading degree of the first carrier CC1 is greater than the channel fading degree of the second carrier CC 2.

In practical applications, if the results of the short sensing type channel sensing performed by the terminal device on the first carrier CC1 and the long sensing type channel sensing performed by the terminal device on the second carrier CC2 are both successful in channel sensing, the terminal device may send the first uplink information on the first carrier, and/or send the second uplink information on the second carrier.

In practical applications, if the sensing result of the terminal device performing the short sensing type channel sensing on the first carrier CC1 is a channel sensing failure, and the sensing result of the terminal device performing the long sensing type channel sensing on the second carrier CC2 is a channel sensing success, the terminal device may send the second uplink message on the second carrier.

It should be understood that, for a multi-carrier channel sensing performed by a terminal device in a carrier set including a first carrier and a second carrier, for the first carrier performing a first channel sensing of a short sensing type, the terminal device is to send first uplink information on the first carrier, and besides the first channel sensing success needs to be satisfied, it is also necessary to satisfy a second channel sensing success performing a long sensing type on the second carrier; if the second channel on the second carrier fails to sense, the terminal device cannot send the first uplink information even if sensing idle on the first carrier. Similarly, the latter terminal device senses for a multicarrier channel including a third carrier, which operates similarly to the first carrier.

After the terminal device determines to perform the long sensing type channel sensing on the second carrier, the following two ways may be included for how to select the first carrier for performing the short sensing type channel sensing in the carrier set.

Optionally, in the first manner, the terminal device performs channel sensing of the long sensing type on the second carrier, and performs channel sensing of the short sensing type on all other carriers in the carrier set, or performs channel sensing of the short sensing type on any one (or each) other carrier in the carrier set, where at this time, the first carrier may be called as any carrier in the carrier set that is different from the second carrier. That is, in addition to the first carrier performing channel sensing using the long sensing type, other carriers in the carrier set (regardless of what sensing type is indicated by the network device to perform channel sensing) are switched to the short sensing type to perform channel sensing.

That is, the first carrier may be a carrier whose channel sensing type performed on the first carrier by the network device before the first uplink information is transmitted is indicated to be a long sensing type, or may be a carrier whose channel sensing type performed on the first carrier by the network device before the first uplink information is transmitted is indicated to be a short sensing type.

It should be understood that, when a first carrier is a carrier indicated by a network device that a channel sensing type performed on the first carrier is a short sensing type before first uplink information is transmitted, the terminal device performs channel sensing of the short sensing type on the first carrier and performs second channel sensing of long sensing type channel sensing on a second carrier, a sensing result of the short sensing type channel sensing on the first carrier is channel sensing success, and a sensing result of the second channel sensing is channel sensing success, the terminal device transmits the first uplink information on the first carrier. Since the condition that the terminal device successfully senses any one of the carriers (regardless of whether the carrier is indicated as the long sensing type or the short sensing type) which actually performs the short sensing type channel sensing is that the channel sensing of the carrier (the second carrier) which actually performs the long sensing type channel sensing is successful and the channel sensing of the short sensing type of the carrier is successful in one carrier set which performs the multi-carrier channel sensing, the third uplink information can be transmitted only if the second channel sensing of the second carrier is successfully satisfied even if the first carrier is indicated as the short sensing type, due to the limited sensing manner. For example, as shown in fig. 4, the carrier set includes { CC1, CC2, CC3, CC4}, the first carrier is CC4, the second carrier is CC1, and the indication information indicates that the terminal device performs channel sensing of the short sensing type on CC4, and also performs channel sensing of the short sensing type on CC 1. Because the carrier set further includes CC2 and CC3, in the multi-carrier sensing actually performed by the terminal device, CC1 performs long sensing type channel sensing, and performs short sensing type channel sensing on CC2, CC3 and CC4, at this time, because the first carrier CC4 and the second carrier CC1 are in the same carrier set, when the sensing result of the terminal device on CC1 is successful, and the sensing result on CC4 is successful, the terminal device can send the first uplink information on CC 4; if the result of the interception of the terminal device to the CC1 is interception failure, the CC4 cannot be occupied to send the first uplink information (no matter whether the interception of the CC4 is successful or not).

Optionally, in the second manner, the terminal device performs the long sensing type channel sensing on the second carrier, and performs the short sensing type channel sensing on all other carriers in the carrier set that the network device indicates to perform the long sensing type channel sensing, or performs the short sensing type channel sensing on any one (or each) of the carrier sets that the network device indicates to perform the long sensing type channel sensing, and at this time, may refer to the first carrier as a carrier in the carrier set that any one sensing type is indicated by the network device as the long sensing type. That is, except that the first carrier performs channel sensing using the long sensing type, all other carriers in the carrier set, which were originally indicated as long sensing type channel sensing, are switched to the short sensing type to perform channel sensing.

In addition, the indication information is further configured to indicate that, before the terminal device sends the third uplink information, an interception type of channel interception performed on the third carrier is the short interception type. Correspondingly, the terminal device is further configured to perform fourth channel sensing on the third carrier, where the fourth channel sensing is channel sensing of the short sensing type. It can also be said that the fourth channel sensing is channel sensing performed for third uplink information. And when the interception result of the fourth channel interception is that channel interception is successful, and the interception result of the second channel interception is that channel interception is successful, the terminal device sends the third uplink information on the third carrier.

Considering that in addition to the first carrier indicated as long sensing type channel sensing and the second carrier indicated as short sensing type channel sensing in the carrier set, it is also possible to include another third carrier indicated as short sensing type channel sensing, since, in a set of carriers that perform multicarrier channel sensing, a carrier on which a terminal apparatus actually performs short sensing type channel sensing (regardless of whether the carrier is indicated as a long sensing type or a short sensing type), the conditions for its sensing success are that the channel sensing of the carrier (second carrier) actually performing the long sensing type channel sensing is successful, and the channel sensing of the carrier wave of the short sensing type is successful, and thus is limited to such a sensing manner, even if the third carrier is indicated as a short sensing type, it is additionally satisfied that the second channel sensing of the second carrier is successful before the third uplink information is transmitted.

For example, as shown in fig. 4, the carrier set includes 4 carriers, where CC1 is the second carrier, the network device indicates to use short sensing type channel sensing, CC2 is the first carrier, the network device indicates to use long sensing type channel sensing, CC4 is the third carrier, the network device indicates to use short sensing type channel sensing, the terminal device actually performs long sensing type channel sensing on CC1, and performs short sensing type channel sensing on CC2 and CC4, but CC2 or CC4 needs to satisfy the success of CC1 long sensing type channel sensing in addition to the success of short sensing type channel sensing of the present carrier, so as to send uplink information.

It should be understood that the third uplink information schedules, for the network device, an uplink message sent by the terminal device on the third carrier. In this embodiment, the start time of the first uplink information, the start time of the second uplink information, and the start time of the third uplink information are the same. That is, when channel sensing on the first carrier, the second carrier, and the third carrier is successful, the terminal device starts to transmit uplink information at the same time on each carrier.

It should be understood that, in addition to the requirement that the fourth channel sensing is successful, the terminal device needs to send the third uplink information on the third carrier, and also needs to additionally satisfy the requirement that the second channel sensing of the long sensing type is successful on the second carrier; if the second channel on the second carrier fails to sense, the terminal device cannot send the third uplink information even if sensing idle on the third carrier.

In this embodiment, the third uplink information may include at least one of the uplink data information, the pilot information, and the uplink control information. The third uplink information may be carried in a PUSCH or a PUCCH. Further, the third uplink information is uplink information scheduled by the network device through an uplink grant.

Optionally, the third uplink information is scheduling-free grant uplink transmission sent by the terminal device on the first carrier. Similarly, the starting time of the third uplink information and the first uplink information and the starting time of the second uplink information are the same, where the first uplink information may be scheduling-free uplink transmission or uplink transmission sent by a network device scheduling terminal device, and the second uplink information may be scheduling-free uplink transmission or uplink transmission sent by a network device scheduling terminal device.

Further, the terminal device may further perform channel sensing of the short sensing type on the second carrier, which is referred to as third channel sensing, and if the sensing result of the third channel sensing on the second carrier CC2 is that the channel sensing is successful, the terminal device may send the second uplink message on the second carrier. In particular, if the sensing result of the terminal device performing the long sensing type channel sensing (i.e., the second channel sensing) on the second carrier CC2 is a channel sensing failure, but the sensing result of the short sensing type channel sensing (i.e., the third channel sensing) on the second carrier CC2 is a channel sensing success, the terminal device may transmit the second uplink message on the second carrier. It is to be understood that the channel sensing of the short sensing type performed by the terminal device on the second carrier and the channel sensing of the long sensing type performed by the terminal device on the second carrier may be simultaneous, that is, the channel sensing of the short sensing type performed by the terminal device on the second carrier is also performed concurrently while the channel sensing of the long sensing type performed by the terminal device on the second carrier is performed.

It should be understood that the terminal device is originally instructed by the network device to access the channel using the single-slot CCA on the second carrier, so if the terminal device fails to perform the long sensing type channel sensing on the second carrier, it may back (Fallback) to the short sensing type channel sensing, that is, perform the short sensing type channel sensing before the second uplink information start time, and if the terminal device succeeds in performing the short sensing type channel sensing on the second carrier, it may transmit the second uplink information on the second carrier.

It should be understood that, when the terminal device fails to perform the long sensing type channel sensing for the second carrier and the terminal device succeeds in performing the short sensing type channel sensing for the second carrier, although the terminal device may transmit the second uplink information on the second carrier, the terminal device cannot occupy the first carrier to transmit the first uplink information or abandon the transmission of the first uplink information on the first carrier. In the multi-carrier sensing, a carrier originally sensed by a long sensing type channel is switched to short sensing type channel sensing, and then the precondition for sending information by an access channel needs to complete the channel sensing of the long sensing type by a carrier (a first carrier) performing the long sensing type channel sensing in a carrier set besides the short sensing type channel sensing on the carrier, so that if the long sensing type channel sensing is not completed on the second carrier, the short sensing type channel sensing is backed to and the channel sensing is completed, although the terminal equipment can send the second uplink information on the second carrier, the condition for sending the first uplink information by the first carrier channel is not satisfied, and therefore the first uplink information cannot be sent on the first carrier.

As shown in fig. 6, the carrier set includes { CC1, CC2, CC3}, the first carrier is CC1, the second carrier is CC2, the indication information indicates that the terminal device performs channel sensing of short sensing type on CC1, performs channel sensing of long sensing type on CC2, and additionally, the network device further indicates that channel sensing of long sensing type is performed on CC 3. In the multicarrier listening operation, the terminal apparatus actually performs channel sensing of a long sensing type on CC1 and short sensing type on CC2 and CC 3. The terminal device may also perform short sensing type channel sensing for CC1 at the same time, and when the terminal device fails to sense the long sensing type channel of CC1 (first sensing), but succeeds to sense the short sensing type channel of CC1 (third sensing), it may occupy CC1 to send the first uplink information; however, considering that the long sensing type channel sensing for the CC1 fails, the CC2 cannot be occupied to transmit uplink information (even though the short sensing type channel sensing for the CC2 succeeds).

The specific implementation of the indication information will be described in detail in three dimensions, namely, the number of the indication information, the carrying information of the indication information, and the indication manner of the indication information.

The indication information may be a single indication information or a plurality of indication information in terms of the number of indication information.

When the indication information is single indication information, the indication information is simultaneously used for indicating that the interception type of channel interception performed on the first carrier wave is the long interception type before the first uplink information is sent, and the interception type of channel interception performed on the second carrier wave is the long interception type before the second uplink information is sent.

When the indication information includes a plurality of indication information, the indication information may include first indication information and second indication information. The first indication information is used for indicating that the interception type of channel interception performed on the first carrier before the first uplink information is sent is a long interception type. The second indication information is used to indicate that the sensing type of channel sensing performed on the second carrier is the short sensing type before the second uplink information is sent. It is to be understood that, when the number of the first carriers is M, the number of the first indication information may also be M, where each of the first indication information indicates one sensing type for performing channel sensing on the first carrier in a one-to-one correspondence, and when the number of the second carriers is N, the number of the second indication information may also be N, where each of the second indication information indicates one sensing type for performing channel sensing on the second carrier in a one-to-one correspondence.

In addition, when the indication information is further used to indicate that the interception type of channel interception performed on the third carrier by the terminal device before the third uplink information is sent is the short interception type, the indication information further includes third indication information. The third indication information is used to indicate that the interception type of channel interception performed on the third carrier by the terminal device before the third uplink information is sent is the short interception type.

It should be understood that, when the indication information includes at least two pieces of indication information of the first indication information, the second indication information, and the third indication information, each piece of the at least two pieces of indication information indicates, by the terminal device, a sensing type of channel sensing performed on a carrier corresponding to the indication information before the terminal device sends uplink information on the corresponding carrier.

From the perspective of bearer information of indication information, the indication information or the first indication information or the second indication information or the third indication information may include at least one of user-specific control information or common control information.

In a specific embodiment, the user-specific control information is control information carried in a downlink control channel. For example, the user-specific control information is an uplink grant (UL grant) for scheduling the terminal device to transmit uplink information, or at least one field in the uplink grant. It is to be understood that the above example is only an example, and is not limited to the specific example, and in other implementations, the user specific control information may also be other control information carried in the downlink control channel.

Further, the user-specific control information is also used to schedule the terminal device to transmit uplink information on one of the carriers in the carrier set. That is, the user-specific control information, in addition to scheduling the terminal device to transmit the first uplink information, also instructs the terminal device to transmit the first uplink information, the interception type of the channel interception of the first carrier is a long interception type, and/or the user specific control information instructs the terminal device to send the second uplink information before the terminal device is scheduled to send the second uplink information, the type of sensing channel sensing performed on the second carrier is the short sensing type, and/or the user specific control information, in addition to scheduling the terminal device to transmit the third uplink information, and further instructing the terminal device to determine the interception type of channel interception performed on the third carrier to be the short interception type before sending the third uplink information.

Further, when the user-specific control information is used to schedule the terminal device to send Uplink information, the user-specific control information further includes at least one of frequency domain resources occupied by the Uplink information, Modulation and Coding Scheme (MCS), and Demodulation Reference Signal (DMRS) sequence information corresponding to a Physical Uplink Shared Channel (PUSCH) carrying the Uplink information.

In a specific embodiment, the common control information is common control information carried in a downlink control channel. For example, the common Control Information is Downlink Control Information (DCI) corresponding to a common Downlink Control Channel (CPDCCH), or at least one field in the Downlink Control Information. The DCI in the CPDCCH is a DCI scrambled by a Cell Common-radio network temporary identifier (CC-RNTI). It is understood that the above example is only an example, and is not limited in particular, and in other implementations, the common control information may also be other common control information carried in a downlink control channel.

It is to be understood that all the indication information may be user-specific control information, all the indication information may be common control information, or a part of the indication information may be user-specific control information and another part of the indication information may be common control information, and the present application is not particularly limited. For example, the indication information includes at least two of first indication information indicating that a listening type for channel sensing by the terminal device for the first carrier is a long listening type, second indication information indicating that a listening type for channel sensing by the terminal device for the second carrier is a short listening type, and third indication information indicating that a listening type for channel sensing by the terminal device for the third carrier is a short listening type, at least one of the at least two indication information is user specific control information, and at least one of the other indication information is common control information.

Optionally, the uplink grant UL grant or the Common physical downlink control channel CPDCCH (or Common downlink control information carried in the CPDCCH) included in the indication information is used to indicate that the type of channel sensing performed on the second carrier by the terminal device before sending the second uplink information is the short sensing type. In other words, the indication information includes second indication information, where the second indication information is carried in a second UL grant or a second CPDCCH, and the second indication information is used to indicate that the type of channel sensing performed by the terminal device on the second carrier before sending the second uplink information is the short sensing type.

Optionally, the uplink grant UL grant or a common physical downlink control channel CPDCCH (or common downlink control information carried in the CPDCCH) included in the indication information is used to indicate that the type of channel sensing performed on the first carrier by the terminal device before sending the first uplink information is the long sensing type. In other words, the indication information includes first indication information, where the first indication information is carried in the first UL grant or the first CPDCCH, and the first indication information is used to indicate that the sensing type of channel sensing performed on the first carrier by the terminal device before the terminal device sends the first uplink information is the long sensing type.

Optionally, the uplink grant UL grant or a common physical downlink control channel CPDCCH (or common downlink control information carried in the CPDCCH) included in the indication information is used to indicate that the listening type of the channel listening to the third carrier by the terminal device is the short listening type before the terminal device sends the third uplink information. In other words, the indication information includes third indication information, where the third indication information is carried in a third UL grant or a third CPDCCH, and the third indication information is used to indicate that, before the terminal device sends the third uplink information, a listening type of channel listening to the third carrier is the short listening type.

Further, the first indication information may be used to indicate a listening type of channel listening performed by the terminal device on the first carrier by an explicit manner or an implicit manner, which is set forth later, where the explicit manner corresponds to a manner of indicating through the first UL grant, and the implicit manner corresponds to a manner of indicating through the first CPDCCH. Similarly, the second indication information is used to indicate a listening type of channel listening performed by the terminal device on the second carrier, where an explicit manner corresponds to a manner of indicating through the second UL grant, and an implicit manner corresponds to a manner of indicating through the second CPDCCH; the second indication information is used for indicating the interception type of channel interception performed by the terminal device on the second carrier, where the explicit mode corresponds to a mode of indicating through the second UL grant, and the implicit mode corresponds to a mode of indicating through the second CPDCCH. Or, the indication information is used to indicate the listening type of the channel sensing performed by the terminal device on the first carrier, the second carrier, or the third carrier, and may be indicated in an explicit manner or an implicit manner, which is set forth later, where the explicit manner corresponds to the manner of indicating through the UL grant, and the implicit manner corresponds to the manner of indicating through the CPDCCH.

From the aspect of the indication manner of the indication information, the indication information may be explicitly or implicitly indicated.

When the first indication information indicates in an explicit manner, the first indication information may be a preset bit, a preset character, a preset field, or the like, which is used for indicating a channel sensing type, and the application is not limited in particular. For example, the listening type is indicated by a 'Channel Access type' field in the first UL grant. For another example, the first indication information may be 1 bit carried in the uplink grant, and when the value of the bit is "0", indicate that the channel sensing type of the first carrier is the long sensing type; when the value of the bit is '1', indicating that the channel sensing type of the first carrier is a short sensing type, or when the value of the bit is '1', indicating that the channel sensing type of the first carrier is a long sensing type; when the value of the bit is "0", indicating that the channel sensing type of the first carrier is a short sensing type. The above-mentioned manner is also applicable when the indication information or the second indication information indicates the channel sensing type of the second carrier, or when the indication information or the third indication information indicates the channel sensing type of the third carrier.

When the second indication information indicates in an implicit manner, the second indication information may indicate second time domain resource information, and when a time unit in which the second uplink information is located is not later than an end time unit of the second time domain resource, the second indication information indicates that the terminal device performs channel sensing of the short sensing type before sending the second uplink information, or the terminal device determines that channel sensing of the short sensing type should be performed before sending the second uplink information. The above method may also be applied to when the first indication information indicates in an implicit manner: the first indication information may indicate first time domain resource information, and when a time unit in which the first uplink information is located is later than an end time unit of the first time domain resource, the first indication information indicates that the terminal device performs channel sensing of a long sensing type before sending the first uplink information, or that the terminal device determines that the terminal device should perform channel sensing of the long sensing type before sending the first uplink information. The above method may also be applied to when the third indication information indicates in an implicit manner: the third indication information may indicate third time domain resource information, and when a time unit in which the third uplink information is located is not later than an end time unit of the third time domain resource, the third indication information indicates that the terminal device executes short-interception-type channel interception before sending the third uplink information, or that the terminal device determines that short-interception-type channel interception should be executed before sending the third uplink information.

Specifically, the first time domain resource information, the second time domain resource information, or the third time domain resource information is referred to as a time domain resource, and the time domain resource information may be embodied in any one of the following manners:

in a first mode, the time domain resource information includes: the ending time of the maximum downlink channel occupation time, or the remaining time length of the maximum downlink channel occupation time. The terminal device may know the end time of the downlink information, so after receiving the time domain resource information of the maximum downlink channel occupation time, the terminal device may directly determine whether the maximum downlink channel occupation time can be shared according to the end time of the maximum downlink channel occupation time or the remaining time length of the maximum downlink channel occupation time.

In a second mode, the time domain resource information includes: the starting time of the maximum downlink channel occupation time, and the duration of the maximum downlink channel occupation time. The terminal device may know the ending time of the downlink information, so after receiving the time domain resource information of the maximum downlink channel occupation time, the terminal device may determine the ending time of the maximum downlink channel occupation time according to the starting time of the maximum downlink channel occupation time and the duration of the maximum downlink channel occupation time, thereby determining whether the maximum downlink channel occupation time can be shared.

For the first mode and the second mode, when a time unit in which uplink information (first uplink information, second uplink information, or third uplink information) to be transmitted by a terminal device is located is not later than an end time unit (end time) of the maximum downlink channel occupancy time, the indication information indicates that the terminal device performs channel sensing of the short sensing type, and when the time unit in which the uplink information to be transmitted by the terminal device is located is later than the end time unit (end time) of the maximum downlink channel occupancy time, the indication information indicates that the terminal device performs channel sensing of the long sensing type.

In a third mode, the time domain resource information includes: a starting time of the scheduled uplink transmission (within the downlink maximum channel occupancy time), and a duration of the scheduled uplink transmission (within the downlink maximum channel occupancy time).

Further, the start time (or start time unit) of the uplink transmission may be a time offset (or time interval) of the start time (or start time unit) of the uplink transmission compared to the end time (or end time unit) of the downlink transmission carrying the indication information or the start time (or time unit) of the time unit carrying the indication information, and the end time (or end time unit) of the uplink transmission is the start time (or start time unit) of the uplink transmission plus the duration of the uplink transmission. When the time unit of the uplink information (first uplink information, second uplink information or third uplink information) to be sent by the terminal equipment is not later than the ending time unit of the uplink transmission, the indication information (or the first indication information, the second indication information or the third indication information) indicates the terminal equipment to execute the channel sensing of the short sensing type, and when the time unit of the uplink information to be sent by the terminal equipment is later than the ending time unit of the uplink transmission, the indication information (or the first indication information, the second indication information or the third indication information) indicates the terminal equipment to execute the channel sensing of the long sensing type. For example, the indication information includes common control information in a common downlink control channel, a 'UL offset' field in the common downlink control channel is used to indicate an offset (referred to as l) of a starting time unit of uplink transmission compared with a time unit (referred to as n) in which the common downlink control channel is located, a 'UL duration' field is used to indicate a duration (referred to as d) of uplink transmission, and the indication information indicates that the terminal device can perform channel sensing of a short sensing type before uplink information to be transmitted on an uplink time unit n + l + i, where i is 0,1, …, d-1. The indication information indicates that the terminal device performs channel sensing of a long sensing type before uplink information to be transmitted on an uplink time unit after n + l + d. For example, as shown in fig. 7, the common downlink control channel of the second carrier CC1 is carried on the subframe # n +4, and indicates that the time offset of the start time of the scheduled uplink transmission is 5ms and the duration of the uplink transmission is 4ms, so that the terminal device can determine that the end time of the maximum downlink channel occupancy time is # n +12, and therefore the uplink information on # n +9 to # n +12 can share the maximum downlink channel occupancy time and use short sensing type channel sensing; the common downlink control channel of the first carrier CC2 is carried on the subframe # n +6, and indicates that the time offset of the start time of the scheduled uplink transmission is 3ms compared to the time offset, and the duration of the uplink transmission is 2ms, so the terminal device can determine that the end time of the maximum downlink channel occupancy time is # n +10, and therefore the uplink information on # n +9 to # n +12 cannot share the maximum downlink channel occupancy time, and channel sensing of the long sensing type needs to be used. It should be understood that the time unit in which the uplink information is located, referred to as the first time unit, is included in the downlink maximum channel occupancy time, which means that the ending time unit of the first time unit is not later than the downlink maximum channel occupancy time or the ending time unit of the uplink transmission. Optionally, the ending time of the maximum downlink channel occupancy time is the starting time of the maximum downlink channel occupancy time plus the duration corresponding to the maximum downlink channel occupancy time. Optionally, the ending time of the maximum downlink channel occupancy time is the starting time of the maximum downlink channel occupancy time plus the duration corresponding to the maximum downlink channel occupancy time plus the duration of all gaps (gaps). The starting time of the maximum downlink channel occupation time is the time when the network device completes channel monitoring and starts to send downlink information. Further, the all gaps are time domain resources or gaps (Gap) that are not occupied by the network device to transmit downlink information after the starting time of the maximum downlink channel occupancy time and are not scheduled by the network device to transmit uplink information (the terminal device may be scheduled by the network device, or the terminal device may not be limited to the terminal device but include at least one terminal device scheduled by the network device). Further, any one of the voids is a void having a duration greater than a first predetermined length, for example, 25 us. The duration corresponding to the downlink maximum channel occupation time is the downlink maximum channel occupation time length corresponding to the channel access priority used by the network device to execute the long interception type channel interception. For example, the duration of the maximum downlink channel occupancy time of the first carrier CC1 is 6ms, and the Gap that is not occupied by the network device to transmit downlink information and is not scheduled by the network device (terminal device accessing the network device) to transmit uplink information is 6ms, so the ending time of the maximum downlink channel occupancy time is # n +12, that is, the uplink subframes # n +9 to # n +12 are all within the maximum downlink channel occupancy time.

Based on the same inventive concept, an embodiment of the present invention further provides a terminal device (as shown in fig. 8), where the terminal device is configured to implement the method described in the foregoing embodiment of fig. 3. As shown in fig. 8, the terminal device 70 includes: a transmitter 703, a receiver 704, a memory 702, and a processor 701 coupled with the memory 702 (the number of the processors 701 may be one or more, and one processor is taken as an example in fig. 8). The transmitter 703, the receiver 704, the memory 702, and the processor 701 may be connected by a bus or other means (the bus connection is taken as an example in fig. 8). The transmitter 703 is used for transmitting data to the outside, and the receiver 704 is used for receiving data from the outside. The memory 702 is used for storing program codes, and the processor 701 is used for calling and executing the program codes stored in the memory 702.

The program code stored in the memory 702 is specifically adapted to implement the functionality of the terminal device in the embodiment of fig. 3. Specifically, the processor 701 is configured to call the program code stored in the memory 702, and execute the following steps:

the terminal device receives indication information sent by the network device through a transmitter/receiver 704, where the indication information is used to indicate that a listening type of channel listening to a first subband is a long listening type before the terminal device sends first uplink information, and indicate that a listening type of channel listening to a second subband is the short listening type before the terminal device sends second uplink information.

The terminal device executes first channel sensing on the first sub-band and executes second channel sensing on the second sub-band through the processor 701, wherein the first channel sensing is channel sensing of a short sensing type, and the second channel sensing is channel sensing of a long sensing type;

when the listening result of the first channel listening and the listening result of the second channel listening satisfy a first preset condition, the terminal device sends the first uplink information on the first subband through the transmitter 703.

Optionally, the first preset condition is that the sensing result of the first channel sensing is that channel sensing is successful, and the sensing result of the second channel sensing is that channel sensing is successful.

Optionally, when the listening result of the second channel listening is that the channel listening is successful, the terminal device sends the second uplink information on the second subband through the transmitter 703.

Optionally, the uplink grant or the common physical downlink control channel included in the indication information is used to indicate that, before the terminal device sends the second uplink information, the listening type of channel listening to the second subband is the short listening type.

Optionally, the terminal device performs third channel sensing on the second subband through the processor 701, where the third channel sensing is channel sensing of the short sensing type, and the third channel sensing is channel sensing performed for the second uplink information; and when the listening result of the third channel listening is that the channel listening is successful, the terminal device sends the second uplink information on the second subband through the transmitter 703.

Optionally, when the listening result of the second channel listening is a channel listening failure, and the listening result of the third channel listening is a channel listening success, the terminal device sends the second uplink information on the second subband through the transmitter 703.

Optionally, the first uplink information is uplink information that is sent by the terminal device and scheduled by the network device, the second uplink information is uplink information that is sent by the terminal device and scheduled by the network device, and a start time of the first uplink information is the same as a start time of the second uplink information.

Optionally, the channel sensing of the long sensing type is a random backoff idle channel sensing; and the short interception type channel interception is single-time slot idle channel evaluation.

Optionally, the first subband is a subband in which any listening type in a subband set is indicated as the long listening type by a network device, where the first subband and the second subband both belong to the subband set.

Optionally, the terminal device determines, by using the processor 701, that the second subband is a subband for performing the long listening type channel listening, where the second subband is a subband randomly selected or randomly selected by the terminal device in a subband set, and both the first subband and the second subband belong to the subband set.

Optionally, when a condition of switching listening type is satisfied between the first sub-band and the second sub-band, the terminal device performs, through the processor 701, the first channel listening on the first sub-band, and performs the second channel listening on the second sub-band; wherein the handover listening type condition comprises at least one of: the channel congestion degree of the first sub-band is greater than that of the second sub-band; and the channel fading degree of the first sub-band is greater than the channel fading degree of the second sub-band.

Optionally, the indication information is further configured to indicate that, before the terminal device sends the third uplink information, an interception type of channel interception performed on the third subband is the short interception type; the terminal device performs fourth channel sensing on the third sub-band through a processor 701, wherein the fourth channel sensing is channel sensing of the short sensing type;

when the listening result of the fourth channel listening is that the channel listening is successful, and the listening result of the second channel listening is that the channel listening is successful, the terminal device sends the third uplink information on the third subband through the transmitter 703.

It should be noted that, through the foregoing detailed description of the embodiment in fig. 3, the implementation method of each component included in the terminal device 70 is clearly known by those skilled in the art, and therefore, for the brevity of the description, detailed description is not provided herein.

Based on the same inventive concept, an embodiment of the present invention further provides an information sending apparatus (as shown in fig. 9), which is configured to implement the method described in the foregoing embodiment of fig. 3. As shown in fig. 9, the information transmitting apparatus 80 includes a receiving module 810, a listening module 820, and a transmitting module 830. The receiving module 810 and the transmitting module 830 may be two separately disposed modules, for example, the receiving module 810 may be an independently disposed receiver, and the transmitting module 830 may be an independently disposed transmitter. The receiving module 810 and the transmitting module 830 may also be integrally configured modules, such as transceivers, etc. Here, the transceiver may be a radio frequency transceiver or the like.

The receiving module 810 is configured to receive indication information sent by a network device, where the indication information is used to indicate that a listening type of channel listening to a first subband is a long listening type before the terminal device sends first uplink information, and indicate that a listening type of channel listening to a second subband is the short listening type before the terminal device sends second uplink information.

The listening module 820 is configured to perform first channel listening on the first subband and perform second channel listening on the second subband, where the first channel listening is channel listening of a short listening type, and the second channel listening is channel listening of the long listening type.

The sending module 830 is configured to send the first uplink information on the first subband when the listening result of the first channel listening and the listening result of the second channel listening satisfy a first preset condition.

It should be noted that, through the foregoing detailed description of the embodiment in fig. 3, a person skilled in the art can clearly know an implementation method of each functional module included in the information sending apparatus 80, and therefore, for the brevity of the description, detailed description is not provided herein.

An embodiment of the present application further provides a communication system, including: network equipment and terminal equipment. The terminal device corresponds to the terminal device in the method embodiment of fig. 3.

As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, optical storage, and the like) having computer-usable program code embodied therein.

The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.

Claims

1. An information transmission method, comprising:

the method comprises the steps that terminal equipment receives indication information sent by network equipment, wherein the indication information is used for indicating that the interception type of channel interception performed on a first sub-band by the terminal equipment is a long interception type before first uplink information is sent, and indicating that the interception type of channel interception performed on a second sub-band by the terminal equipment is a short interception type before second uplink information is sent;

the terminal device performs first channel sensing on the first sub-band and performs second channel sensing on a second sub-band, wherein the first channel sensing is channel sensing of the short sensing type, and the second channel sensing is channel sensing of the long sensing type, wherein the first sub-band is a sub-band of which any sensing type in a sub-band set is indicated as the long sensing type by a network device, and both the first sub-band and the second sub-band belong to the sub-band set;

when the interception result of the first channel interception and the interception result of the second channel interception meet a first preset condition, the terminal equipment sends the first uplink information on the first sub-band;

wherein the method further comprises:

the terminal device executes third channel sensing on the second sub-band, wherein the third channel sensing is channel sensing of the short sensing type, and the third channel sensing is channel sensing executed for the second uplink information;

when the interception result of the third channel interception is that channel interception is successful, the terminal device sends the second uplink information on the second sub-band;

wherein, when the listening result of the third channel listening is that the channel listening is successful, the terminal device sends the second uplink information on the second subband, including: when the interception result of the second channel interception is channel interception failure and the interception result of the third channel interception is channel interception success, the terminal device sends the second uplink information on the second sub-band;

the second sub-band is a sub-band randomly selected or randomly selected by the terminal equipment in a sub-band set, and both the first sub-band and the second sub-band belong to the sub-band set;

the first preset condition is that the interception result of the first channel interception is that channel interception is successful, and the interception result of the second channel interception is that channel interception is successful.

2. The method of claim 1, further comprising:

and when the interception result of the second channel interception is that the channel interception is successful, the terminal equipment sends the second uplink information on the second sub-band.

3. The method according to any one of claims 1 to 2, wherein an uplink grant or a common physical downlink control channel included in the indication information is used to indicate that the type of sensing for channel sensing on the second subband by the terminal device before sending the second uplink information is the short sensing type.

4. An information transmission method, characterized in that it comprises all the features of the method of any one of claims 1 to 3 and,

the first uplink information is uplink information which is sent by the terminal equipment and scheduled by the network equipment, the second uplink information is uplink information which is sent by the terminal equipment and scheduled by the network equipment, and the starting time of the first uplink information is the same as the starting time of the second uplink information.

5. An information sending method, characterized in that the method comprises all the features of the method of any one of claims 1 to 4, and the long interception type channel interception is a random backoff idle channel evaluation; and the short interception type channel interception is single-time slot idle channel evaluation.

6. An information transmission method, characterized in that it comprises all the features of the method of any of claims 1 to 5, and before the terminal device performs the second channel sensing on the second sub-band, it further comprises: and the terminal equipment determines the second sub-band as the sub-band for executing the long interception type channel interception.

7. An information transmission method, characterized in that it comprises all the features of the method of any one of claims 1 to 6, and in that a terminal device performs a first channel sensing on said first sub-band and a second channel sensing on said second sub-band, comprising:

when the switching listening type condition is met between the first sub-band and the second sub-band, the terminal equipment performs the first channel listening on the first sub-band and performs the second channel listening on the second sub-band; wherein,

8. An information sending method, characterized in that the method includes all the features of any one of claims 1 to 7, and the indication information is further used for indicating that the interception type of channel interception performed on a third subband by the terminal device before sending third uplink information is the short interception type; the method further comprises the following steps:

9. An information transmission method, comprising:

the method for performing first channel sensing on the first sub-band and performing second channel sensing on the second sub-band by the terminal device includes:

when the switching listening type condition is met between the first sub-band and the second sub-band, the terminal equipment performs the first channel listening on the first sub-band and performs the second channel listening on the second sub-band;

wherein the handover listening type condition comprises at least one of: the channel congestion degree of the first sub-band is greater than that of the second sub-band; and the channel fading degree of the first sub-band is greater than the channel fading degree of the second sub-band;

10. An information transmission apparatus, comprising:

a receiving module, a monitoring module and a sending module,

the receiving module is configured to receive indication information sent by a network device, where the indication information is used to indicate that an interception type of channel interception performed on a first sub-band by a terminal device before sending a first uplink information is a long interception type, and indicate that an interception type of channel interception performed on a second sub-band by the terminal device before sending a second uplink information is a short interception type;

the listening module is configured to perform first channel listening on the first subband and perform second channel listening on a second subband, where the first channel listening is channel listening of the short listening type and the second channel listening is channel listening of the long listening type, the first subband is a subband in which any listening type in a subband set is indicated as the long listening type by a network device, and both the first subband and the second subband belong to the subband set;

the sending module is configured to send the first uplink information on the first subband when the listening result of the first channel listening and the listening result of the second channel listening satisfy a first preset condition;

the listening module is further configured to perform third channel listening on the second subband, where the third channel listening is channel listening of the short listening type;

the sending module is further configured to send the second uplink information on the second subband when the listening result of the third channel listening is that channel listening is successful;

wherein,

the sending module is further configured to send the second uplink information on the second subband when the listening result of the second channel listening is a channel listening failure, and the listening result of the third channel listening is a channel listening success;

11. The apparatus according to claim 10, wherein the sending module is further configured to send the second uplink information on the second subband when the listening result of the second channel sensing is channel sensing success.

12. An information transmitting apparatus, characterized in that the apparatus includes all the features of the apparatus in any one of claims 10 to 11, and the uplink grant or the common physical downlink control channel included in the indication information is used to indicate that the type of channel sensing performed on the second subband by the terminal device before transmitting the second uplink information is the short sensing type.

13. An information transmitting apparatus, comprising all the features of the apparatus of any one of claims 10 to 12, wherein the first uplink information is the uplink information scheduled by the network device and transmitted by the terminal device, the second uplink information is the uplink information scheduled by the network device and transmitted by the terminal device, and a starting time of the first uplink information and a starting time of the second uplink information are the same.

14. An information transmission apparatus, characterized in that the apparatus comprises all the features of the apparatus of any one of claims 10 to 13, and that the long listening type of channel listening is a random back off clear channel assessment; and the short interception type channel interception is single-time slot idle channel evaluation.

15. An information transmission apparatus, characterized in that the apparatus comprises all the features of the apparatus of any one of claims 10 to 14, and,

and the terminal equipment determines that the second sub-band is a sub-band for executing the long listening type channel listening, wherein the second sub-band is a sub-band randomly selected or randomly selected by the terminal equipment in a sub-band set, and the first sub-band and the second sub-band both belong to the sub-band set.

16. An information transmission apparatus, characterized in that the apparatus comprises all the features of the apparatus of any one of claims 10 to 15, and,

the listening module is configured to perform the first channel listening on the first sub-band and perform the second channel listening on the second sub-band when a condition of switching listening types is satisfied between the first sub-band and the second sub-band; wherein,

17. An information transmitting apparatus, characterized in that the apparatus includes all the features of the apparatus in any one of claims 10 to 16, and the indication information is further used for indicating that the interception type of channel interception performed on the third subband by the terminal device before transmitting the third uplink information is the short interception type;

the interception module is further configured to perform fourth channel interception on the third subband, where the fourth channel interception is channel interception of the short interception type;

the sending module is further configured to send the third uplink information on the third subband when the listening result of the fourth channel listening is that channel listening is successful, and the listening result of the second channel listening is that channel listening is successful.

18. An information transmission apparatus, comprising: a receiving module, a monitoring module and a sending module,

wherein,

19. A terminal device, comprising: a memory, and a processor, a communication module coupled with the memory, wherein: the communication module is used for transmitting or receiving externally transmitted data, the memory is used for storing implementation codes of the method as described in any one of claims 1 to 9, and the processor is used for executing the program codes stored in the memory to implement the method as described in any one of claims 1 to 9.

20. A computer-readable storage medium, characterized in that,

the computer-readable storage medium stores a computer program which, when executed by a processor, implements the method of any of claims 1 to 9.

21. A communication system comprising a network device and a terminal device, wherein the network device and the terminal device are capable of communicating with each other, and the terminal device is an apparatus or a terminal device according to any one of claims 10 to 19.