CN115088341A

CN115088341A - Data transmission method and device

Info

Publication number: CN115088341A
Application number: CN202080096420.8A
Authority: CN
Inventors: 苏宏家; 郭文婷; 陈二凯; 向铮铮
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2020-04-24
Filing date: 2020-04-24
Publication date: 2022-09-20
Also published as: WO2021212475A1

Abstract

The application provides a data transmission method and device, which can be applied to systems such as the Internet of vehicles, V2X and V2V. In the method, a first listening window is determined, a selection window is determined according to the first listening window and a first time period, a first resource is determined in the selection window, and data is sent on the first resource. The first time period comprises part or all DRX activation time, and the DRX activation time of the sending terminal is considered when the resource selection is carried out, so that the selection window is determined according to the DRX activation time of the sending terminal, the resource selection is carried out more reasonably, the collision probability of the resource used by the sending terminal and the resource used by other terminals is reduced, and the transmission reliability is improved.

Description

Data transmission method and device

Technical Field

The present application relates to the field of communications technologies, and in particular, to a data transmission method and apparatus.

Background

With the development of wireless communication technology, the demand for user experience and high data rate is increasing. Meanwhile, there is an increasing demand for proximity services that understand and communicate with surrounding people or things, and thus device-to-device (D2D) technology has come into play. The application of the D2D technology can reduce the burden of a cellular network, reduce the power consumption of a terminal, improve the data rate and well meet the requirement of proximity service. The D2D technology allows multiple terminals supporting D2D functionality to conduct direct discovery and direct communication with or without network infrastructure.

In the D2D scenario, the transmitting terminal may select the time-frequency resources for transmitting data itself. For example, the sending terminal is triggered to perform resource selection at time n, and the sending terminal may perform resource selection on a selection window (selection window) after time n according to a listening result in a listening window (listening window) before time n. Specifically, referring to fig. 1, the sending terminal determines, according to the listening result in the listening window, the time-frequency resources used by other terminals on the selecting window, and determines the time-frequency resources in the selecting window except the time-frequency resources used by other terminals as the time-frequency resources capable of sending data, thereby preventing resource collision between different terminals.

The interception and resource selection mechanism is designed under the condition that the sending terminal works in a normal state, if the sending terminal works in a Discontinuous Reception (DRX) mode, the sending terminal can receive control information and data information of a side link at a DRX active time, and does not receive the control information and/or the data information of the side link at a DRX inactive time. The prior art does not consider the situation, which results in an increase in the probability of collision between the resource selected by the transmitting terminal and the resource selected by other terminals, and further results in a decrease in the transmission reliability of the entire system.

Disclosure of Invention

The embodiment of the application provides a data transmission method and device, which can be applied to vehicle networking, for example, vehicle to all (V2X) communication, long term evolution-vehicle (long term evolution-LTE-V) communication, vehicle to vehicle (V2 to vehicle, V2V) communication, and the like, or can be used in the fields of intelligent driving, intelligent internet networking, and the like, for realizing autonomous resource selection under the condition that a sending terminal works in a DRX mode, reducing the collision probability of resources used by the sending terminal and resources used by other terminals, and improving transmission reliability.

In order to achieve the above purpose, the embodiments of the present application provide the following technical solutions:

in a first aspect, a data transmission method is provided, including: determining a first listening window, determining a selection window according to the first listening window and a first time period, determining a first resource in the selection window, and sending data on the first resource. Wherein the first period of time includes a portion or all of the DRX active time. In the method provided by the first aspect, the DRX activation time of the sending terminal is taken into consideration when resource selection is carried out, so that the selection window is determined according to the DRX activation time of the sending terminal, resource selection is carried out more reasonably, the collision probability of the resources used by the sending terminal and the resources used by other terminals is reduced, and the transmission reliability is improved.

In one possible implementation, determining the selection window according to the first listening window and the first time period includes: and determining a second listening window and a selection window when the overlapped part of the first listening window and the first time period is less than or equal to a first threshold, wherein the second listening window is positioned behind the first listening window, and the selection window is positioned behind the second listening window. The overlapped part of the first listening window and the first time period is less than or equal to the first threshold, the sending terminal cannot obtain enough listening information, so that the listening result cannot completely reflect the use condition of the channel, therefore, the resources can be randomly selected in the existing selection window or the incomplete listening result can be determined according to the insufficient listening information, the collision probability of the selected resources and the resources selected by other terminals is increased, and the transmission reliability of the whole system is reduced. According to the possible implementation mode, the sending terminal determines the second listening window and the selection window and performs resource selection in the selection window, so that the resource conflict probability can be reduced, and the transmission reliability can be improved. With the reduction of the resource conflict probability, the times of selecting resources by the sending terminal becomes less, so that the resource utilization rate can be improved.

In one possible implementation, determining the first resource within the selection window includes: and determining the first resource in the selection window according to the interception result in the second interception window. The possible implementation mode can listen to enough listening results in the second listening window, so that the resource selection is reasonably carried out.

In one possible implementation, the method further includes: if the state at the starting time of the second listening window is the non-activated state of the DRX, switching to the activated state of the DRX and at least continuing the activated state of the DRX until the second listening window is finished; or if the state at the starting time of the second listening window is the active state of the DRX, the active state of the DRX is continued at least until the second listening window is ended. This possible implementation may ensure that the second listening window is active for listening in the second listening window.

In one possible implementation, the time interval between the second listening window and the selection window is greater than or equal to the time required to process the listening result and determine the first resource. This possible implementation may ensure that the resource selection may be completed before the selection window.

In one possible implementation, the first listening window is determined at time n, and the second listening window starts at (n + t) _A ) The end time is (n + t) _B )，t _A Greater than or equal to the time required for determining the first listening window, the second listening window and the selection window, t is greater than or equal to 0 _A ＜t _B . This possible implementation provides a possible range for the second listening window.

In one possible implementation, the starting time of the selection window is (n + t) _B +t _D +t _E ) The end time is (n + t) _F )，t _D Greater than or equal to the time required to process the interception result, t _D ≥0，t _E Greater than or equal to the time required to determine the first resource, t _E ≥0，t _B +t _D +t _E ＜t _F Is less than or equal to the second threshold value. This possible implementation provides a possible range of selection windows.

In one possible implementation, determining a selection window according to a first listening window and a first time period, and determining a first resource within the selection window includes: the overlapping part of the first listening window and the first time period is larger than a first threshold value, a first resource is determined in a selection window according to a listening result in the overlapping part of the first listening window and the first time period, and the selection window is positioned behind the first listening window. The overlapping part of the first listening window and the first time period is larger than the first threshold value, and the sending terminal can obtain enough listening results, so that the existing method can be adopted for resource selection.

In one possible implementation, the first time period is all DRX active times in the first listening window; alternatively, the first period of time is a DRX duration in the first listening window. This possible implementation provides two possible scenarios for the first time period.

In a second aspect, a communication device is provided, the device comprising a processing unit and a transceiving unit; the processing unit is used for determining a first listening window, determining a selection window according to the first listening window and a first time period, and determining a first resource in the selection window; wherein the first time period comprises a part of or all DRX activation time; a transceiving unit, configured to transmit data on the first resource.

In a possible implementation manner, a portion of the first listening window overlapping with the first time period is less than or equal to a first threshold, and the processing unit is specifically configured to determine a second listening window and a selection window, where the second listening window is located after the first listening window, and the selection window is located after the second listening window.

In a possible implementation manner, the processing unit is specifically configured to: and determining the first resource in the selection window according to the interception result in the second interception window.

In a possible implementation manner, the processing unit is further configured to, when the state of the starting time of the second listening window is a non-active state of DRX, switch to an active state of DRX and continue the active state of DRX at least until the second listening window ends; or, the processing unit is further configured to, when the state of the starting time of the second listening window is an active state of DRX, continue the active state of DRX at least until the second listening window ends.

In one possible implementation, the time interval between the second listening window and the selection window is greater than or equal to the time required to process the listening result and determine the first resource.

In a possible implementation, the first listening window is determined by the processing unit at time n, and the second listening window starts at (n + t) _A ) The end time is (n + t) _B )，t _A Greater than or equal to the time required for determining the first listening window, the second listening window and the selection window, t is greater than or equal to 0 _A ＜t _B 。

In one possible implementation, the starting time of the selection window is (n + t) _B +t _D +t _E ) The end time is (n + t) _F )，t _D Greater than or equal to the time required to process the interception result, t _D ≥0，t _E Greater than or equal to the time required to determine the first resource, t _E ≥0，t _B +t _D +t _E ＜t _F Is less than or equal to the second threshold value.

In a possible implementation manner, a portion of the first listening window overlapping the first time period is greater than a first threshold, and the processing unit is specifically configured to determine the first resource in a selection window according to a listening result in the portion of the first listening window overlapping the first time period, where the selection window is located after the first listening window.

In one possible implementation, the first time period is the total DRX activation time in the first listening window; alternatively, the first period of time is a DRX duration in the first listening window.

In a third aspect, a communication apparatus is provided, including: a processor. The processor is connected to a memory, which may be integrated or disposed in the communication device, or disposed outside the communication device, and the memory is used to store computer executable instructions, and the processor executes the computer executable instructions stored in the memory, thereby implementing any one of the methods provided by the first aspect. For example, the memory and the processor may be integrated together or may be separate devices.

In one possible implementation, the processor includes logic circuitry and further includes at least one of an input interface and an output interface. Illustratively, the output interface is for performing the act of transmitting in the respective method and the input interface is for performing the act of receiving in the respective method.

In one possible implementation, the communication device further includes a communication interface and a communication bus, and the processor, the memory, and the communication interface are connected by the communication bus. The communication interface is used for executing the actions of transceiving in the corresponding method. The communication interface may also be referred to as a transceiver. Optionally, the communication interface comprises at least one of a transmitter and a receiver, in which case the transmitter is configured to perform the act of transmitting in the respective method and the receiver is configured to perform the act of receiving in the respective method.

In one possible implementation, the communication device may be a chip or a system on a chip.

In a fourth aspect, there is provided a communication apparatus comprising: a processor and an interface circuit; the interface circuit is used for receiving the code instruction and transmitting the code instruction to the processor; a processor for executing code instructions to perform any of the methods provided by the first aspect.

In a fifth aspect, a terminal is provided, which may perform any one of the methods provided in the first aspect.

In a sixth aspect, there is provided a communication system comprising: a sending terminal and a receiving terminal, wherein the sending terminal is configured to perform any one of the methods provided by the first aspect.

In a seventh aspect, a communication system is provided, including: an access network device, a sending terminal and at least one receiving terminal, wherein the sending terminal is configured to perform any one of the methods provided by the first aspect.

In an eighth aspect, a readable storage medium is provided for storing instructions that, when executed, cause any one of the methods provided by the first aspect to be implemented.

In a ninth aspect, there is provided a computer readable storage medium for storing a computer program executable by a processor for implementing any one of the methods provided by the first aspect.

In a tenth aspect, there is provided a computer program product comprising instructions which, when run on a computer, cause the computer to perform any one of the methods provided in the first aspect.

In an eleventh aspect, there is provided a computer program which, when executed, causes any one of the methods provided in the first aspect to be performed.

Technical effects brought by any one implementation manner of the second aspect to the eleventh aspect may be referred to technical effects brought by a corresponding implementation manner in the first aspect, and are not described herein again.

It should be noted that, on the premise that the schemes are not inconsistent, the schemes in the above aspects may be combined.

Drawings

Fig. 1 is a schematic diagram of an audiological window and a selection window provided in an embodiment of the present application;

fig. 2 is a schematic diagram of communication between terminals according to an embodiment of the present application;

fig. 3 is a schematic diagram of a location of a terminal and a coverage area of an access network device according to an embodiment of the present disclosure;

FIG. 4 is a schematic diagram of V2X communication provided by an embodiment of the present application;

fig. 5 is a schematic diagram of another listening window and a selection window provided in the embodiment of the present application;

fig. 6 is a schematic diagram of a DRX activation time according to an embodiment of the present disclosure;

fig. 7 is a flowchart of a data transmission method according to an embodiment of the present application;

fig. 8 is a schematic view of a first listening window according to an embodiment of the present disclosure;

fig. 9 is a schematic view of another first listening window provided in the embodiment of the present application;

fig. 10 is a schematic diagram of a second listening window and a first selection window according to an embodiment of the present application;

fig. 11 is a flowchart of another data transmission method provided in the embodiment of the present application;

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

fig. 13 is a schematic hardware structure diagram of a communication device according to an embodiment of the present disclosure;

fig. 14 is a schematic hardware structure diagram of another communication apparatus according to an embodiment of the present application;

fig. 15 is a schematic hardware structure diagram of a sending terminal according to an embodiment of the present application.

Detailed Description

In the description of this application, "/" denotes "or" means, for example, a/B may denote a or B, unless otherwise indicated. "and/or" herein is merely an association relationship describing an associated object, and means that there may be three relationships, for example, a and/or B, and may mean: a exists alone, A and B exist simultaneously, and B exists alone. Further, "at least one" means one or more, "a plurality" means two or more. The terms "first", "second", and the like do not necessarily limit the number and execution order, and the terms "first", "second", and the like do not necessarily limit the difference.

It is noted that, in the present application, words such as "exemplary" or "for example" are used to mean exemplary, illustrative, or descriptive. Any embodiment or design described herein as "exemplary" or "e.g.," is not necessarily to be construed as preferred or advantageous over other embodiments or designs. Rather, use of the word "exemplary" or "such as" is intended to present concepts related in a particular manner.

The communication system to which the method provided in the embodiment of the present application is applicable includes, but is not limited to, a fifth generation (5th-generation, 5G) system, a New Radio (NR) system, a Wireless Local Area Network (WLAN) system, and a future evolution system or a multiple communication convergence system. The 5G system may be a non-standalone (NSA) 5G system or a Standalone (SA) 5G system.

Referring to fig. 2, a method provided in an embodiment of the present application mainly relates to a terminal and communication between terminals. The two communicating terminals in the embodiment of the present application may be both in the coverage area of the access network device (see (a) in fig. 3), one may be in the coverage area of the access network device, the other may not be in the coverage area of the access network device (see (b) in fig. 3), and neither may be in the coverage area of the access network device (see (c) in fig. 3).

The communication link for performing direct communication between terminals may be referred to as a Sidelink (SL) or a side link. The transmitting terminal may transmit Sidelink Control Information (SCI) and sidelink data to the receiving terminal in one time unit, the SCI being used for scheduling the sidelink data. The receiving terminal can determine the position of the transmitting side line data of the transmitting terminal by receiving the SCI and receive the side line data at the corresponding position. On the side link, the sending terminal can directly send data to the receiving terminal, and the data does not need to be sent to the access network equipment first, then forwarded by the core network and sent to the receiving terminal, so that the transmission delay of the data can be greatly reduced.

The time unit in the embodiment of the present application is a resource unit in a time domain resource. The time unit in this embodiment is a set of multiple consecutive Orthogonal Frequency Division Multiplexing (OFDM) symbols. For example, the time unit may be a mini slot (minislot), a slot (slot), a subframe (subframe), a Transmission Time Interval (TTI), and the like.

In the NR system, 1 slot contains 14 OFDM symbols for a normal (normal) Cyclic Prefix (CP). For extended (extended) CP, 1 slot contains 12 OFDM symbols. The SL time domain resource for D2D or V2X communication may be several consecutive symbols within 1 slot, for example, 8 symbols within one slot are used for SL transmission and SL reception, and the symbols in one slot for SL transmission and SL reception may be configured by the access network device or pre-configured by the user.

A time unit may also be referred to as a time domain unit, time domain granularity, or the like. For convenience of understanding, in the following description of the present application, a time unit is taken as an example of a time slot, and the method provided by the embodiment of the present application is exemplified. It is understood that the time slots in the following description may be replaced by time units, and are not limited to time slots.

The method provided by the embodiment of the application can be applied to the following fields: V2X, unmanned driving (automatic driving, ADS), driver Assisted Driving (ADAS), intelligent driving (intelligent driving), internet driving (connected driving), intelligent internet driving (intelligent network driving), vehicle sharing (car sharing), and the like.

Wherein V2X refers to communication between a car and anything. The internet of vehicles generally refers to a communication network that provides vehicle information through sensors, vehicle terminals, and the like mounted on a vehicle, and enables mutual communication between a vehicle to vehicle (V2V), a vehicle to infrastructure (V2I), a vehicle to network (V2N), and a vehicle to pedestrian (V2P). The V2X communication is a basic technology and a key technology applied in a scene with a very high requirement on communication delay in the future, such as intelligent automobiles, automatic driving, intelligent transportation systems, and the like, for high-speed devices represented by vehicles. The Vehicle user (V-UE) can send some information of the Vehicle user, such as position, speed, intention (turning, merging, reversing) and other information periodically and some non-periodic event-triggered information to the surrounding V-UE, and the V-UE also receives the information of the surrounding user in real time.

Exemplarily, (a) in fig. 4 shows an example of one type of V2V communication, (b) in fig. 4 shows an example of one type of V2P communication, and (c) in fig. 4 shows an example of one type of V2I/V2N communication.

The access network device in the embodiment of the present application is an entity for sending a signal, or receiving a signal, or sending a signal and receiving a signal on a network side. The access network device may be a device deployed in a Radio Access Network (RAN) and providing a wireless communication function for a terminal, for example, the device may be a Transmission Reception Point (TRP), a base station, various forms of control nodes (e.g., a network controller, a wireless controller (e.g., a wireless controller in a Cloud Radio Access Network (CRAN) scenario)), and the like. Specifically, the conventional macro base station (eNB) may be a conventional macro base station (UMTS) in a conventional Universal Mobile Telecommunications System (UMTS) or an LTE system, the conventional macro base station (eNB) may be a micro base station eNB in a Heterogeneous Network (HetNet) scenario, the distributed base station scenario may include a Base Band Unit (BBU) and a Radio Remote Unit (RRU), the distributed base station scenario may include a BBU and an RRU in a CRAN scenario, and the distributed base station scenario may include a next generation base station (gbb) in a 5G system or an NR system. The control node may be connected to a plurality of base stations, and configure resources for a plurality of terminals under the coverage of the plurality of base stations. The access network device may also be an access network device in a Public Land Mobile Network (PLMN) for future evolution, and the like.

The terminal involved in the embodiments of the present application is an entity for receiving signals, or transmitting signals, or both. The terminal is used to provide one or more of voice services and data connectivity services to the user. A terminal can also be called a User Equipment (UE), terminal equipment, access terminal, subscriber unit, subscriber station, mobile station, remote terminal, mobile device, user terminal, wireless communication device, user agent, or user device. The terminal may be a V2X device, such as a smart car (smart car or interactive car), a digital car (digital car), an unmanned car (unmanned car or drive-less car or pilot-less car or automatic car), an automatic car (self-driving car or automatic car), a pure electric car (pure EV or Battery EV), a hybrid electric car (HEV), a Range Extended EV (REEV), a plug-in hybrid electric car (PHEV), a new energy vehicle (new energy vehicle), a roadside device (RSU), a vehicle-mounted communication module, or other embedded communication module. The terminal may also be a D2D device, such as an electricity meter, water meter, or the like. The terminal may also be a Mobile Station (MS), a subscriber unit (subscriber unit), a drone, an internet of things (IoT) device, a station in a WLAN (ST), a cellular phone (cellular phone), a smart phone (smart phone), a cordless phone, a wireless data card, a tablet, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA) device, a laptop computer (laptop computer), a Machine Type Communication (MTC) terminal, a handheld device with wireless communication capability, a computing device or other processing device connected to a wireless modem, a vehicle mounted device, a wearable device (also referred to as a wearable smart device). The terminal may also be a terminal in a next generation communication system, e.g. a terminal in a 5G system or a terminal in a PLMN for future evolution, a terminal in an NR system, etc.

In order to make the embodiments of the present application clearer, concepts and parts related to the embodiments of the present application will be briefly described below.

1. Resource allocation patterns of existing transmitting terminals.

There are two modes of resource allocation for the sending terminal, one for allocating resource modes for the access network device, mode 1(mode-1), and one for the sending terminal to choose from the resource mode, mode 2 (mode-2).

mode-1 is mainly applied to D2D communication or V2X communication when a transmission terminal is in the coverage area of an access network device, and resource allocation is performed by the access network device for the transmission terminal.

mode-2 is not limited to network coverage, and the transmitting terminal may perform D2D communication or V2X communication with the receiving terminal when the transmitting terminal is not in the coverage area of the access network device. The resource allocation of the transmitting terminal is independent of the access network equipment.

The resources mentioned in the embodiments of the present application include time domain resources and/or frequency domain resources.

2. Physical Sidelink Control Channel (PSCCH), physical sidelink shared channel (PSCCH)

Both PSCCH and PSCCH are physical channels between terminals. The PSCCH is mainly used for carrying control information of side uplink data. The PSSCH is mainly used for carrying side uplink data and can also carry control information. For example, the SCIs may include two levels, a first level SCI (1st-stage SCI), which may be carried in the PSCCH. The second-level SCI (2nd-stage SCI) bit is flexible, and at least one of the format (including different information fields), the size, the code rate and the resource can be indicated by the first-level SCI and can be carried in the PSSCH.

3. When the resource allocation mode of the transmitting terminal is mode-2, the existing resource selection mechanism of the transmitting terminal is adopted.

Referring to fig. 5, if the sending terminal is triggered to perform resource selection in the time slot n, the sending terminal obtains an interception result in the interception window, and according to the interception result in the interception window, the unavailable time-frequency resources are removed in the selection window to obtain the available time-frequency resources in the selection window, and then the time-frequency resources are determined from the available time-frequency resources to be used for sending data.

Assuming that the scope of the listening window and the selection window are defined by time slot, the scope of the listening window is n-t ₀ ，n-t _proc，0 ]. Wherein, t ₀ For determining boundary values of listening windows (i.e. n-t) ₀ )。t ₀ Related to the subcarrier spacing. Illustratively, in the case of a 15kHz subcarrier spacing, t ₀ Which is 1100 slots or 100 slots. In the case of 60kHz subcarrier spacing, t ₀ Is 4400 time slotsSlots or 400 time slots. t is t _proc，0 Time required for the sending terminal to process the interception result, t _proc，0 Not less than 0, according to different t of sending terminal capability _proc，0 The values are different.

The range of the selection window is [ n + t ] ₁ ，n+t ₂ ]. Wherein t is more than or equal to 0 ₁ ≤t _proc，1 ，t _proc，1 The time required for the sending terminal to process the data to be sent is t according to the different capabilities of the sending terminal _proc，1 The values are different. t is t _{2_min} ＜t ₂ Less than or equal to the Packet Delay Budget (PDB). The PDB is the maximum delay time required for a packet to be generated from the service layer to be successfully transmitted. The PDB may be a value for measuring a delay time of data to be transmitted in units of a slot, a subframe, a frame, or the like, or may be a value for measuring a delay time of data to be transmitted in units of milliseconds (ms), seconds(s), or the like. It is understood that in time slot n, the remaining PDB is the delay time remaining from the service layer to time slot n. For example, in slot n, if the remaining PDB is 20ms and one slot is 0.5ms, then in slot n +1, the remaining PDB is 19.5ms and in slot n +2, the remaining PDB is 19 ms.

The process of the sending terminal for specifically selecting the resource comprises the following steps:

1) sending terminal in listening window n-t ₀ ，n-t _proc，0 ]SCIs from other terminals are received in the resource pool, and the SCIs contain interception information of the other terminals. Further, the SCI is a first-stage SCI (1st-stage SCI) and is transmitted on a Physical Sidelink Control Channel (PSCCH).

Wherein one SCI may schedule at least one transmission, e.g. 3 transmissions. For example, the first transmission of the 3 transmissions is an initial transmission of data, the last two transmissions are retransmissions of the data, or the 3 transmissions are all retransmissions of a certain data. The SCI includes interception information including time-frequency resource information of scheduling data for the second and third retransmissions, periodic time-frequency resource information and data priority information (priority of psch) that embody a data service period, and the like. It will be appreciated that at a given time instant, a terminal may anticipate, by sending an SCI, that time-frequency resources after that time instant will be used for retransmission of one data and/or transmission of another new periodic data.

2) If the transmitting terminal knows from the received interception information of SCI from the terminal 1, the time frequency resource reserved by the terminal 1 is positioned in the selection window [ n + t ] of the transmitting terminal ₁ ，n+t ₂ ]And the sending terminal measures the demodulation reference signal (DMRS) of the data or control channel that the terminal 1 needs to send on the time-frequency resource according to the listening information, so as to obtain Reference Signal Received Power (RSRP). If the RSRP is larger than the preset RSRP threshold Th configured by the access network equipment _RSRP Then the sending terminal excludes the time frequency resource from the selection window.

3) After excluding the unavailable time frequency resources in the selection window, the sending terminal can determine the remaining time frequency resources in the selection window as the available time frequency resources, so as to select the time frequency resources from the available time frequency resources to send data. One way to achieve this is to randomly select one of the available time frequency resources for transmitting data.

In the existing mechanism, the time-frequency resource used by the sending terminal when sending data is based on the sending terminal in the monitoring window [ n-t ] ₀ ，n-t _proc，0 ]The results of the interception (i.e., the determined available resources) are selected. In the technical solution provided in the embodiment of the present application, unless otherwise specified, the interception result refers to a result determined by the 3 steps 1), 2) and 3) above.

4. DRX mode for sidelink

Since packet-based data streams are typically bursty or have long transmission periods of periodic data, i.e., there is data transmission for a period of time, but there may be no data transmission for the next longer period of time. When no data is transmitted, the power consumption can be reduced by turning off a receiver (or called a receiving circuit) of the terminal, so that the service time of the mobile battery is prolonged. Accordingly, the DRX mode is proposed for reducing power consumption of the terminal.

On the sidelink, the DRX mode refers to an operation mode that saves power consumption of the terminal in which the terminal turns on the receiver to receive sidelink information only for a necessary period of time and turns off the receiver not to receive the sidelink information for the remaining period of time. Here, a period in which the sidelink information can be received is referred to as a DRX active time (DRX active time) (may also be referred to as an awake time), and a state in which the sidelink information can be received is referred to as an active state (may also be referred to as an awake state). A period in which the sidelink information is not received is referred to as DRX inactive time (may also be referred to as sleep time), and a state in which the sidelink information is not received may be referred to as an inactive state (may also be referred to as a sleep state). In the active state, the terminal may receive control information and data information of the sidelink, and in the inactive state, the terminal does not receive control information and/or data information of the sidelink. Wherein the terminal may be configured into a DRX mode for the sidelink by other terminals or access network devices.

In the connected DRX mode, the terminal cannot always turn off the receiver, must turn On the receiver periodically, and starts to continuously receive the sidelink information for a certain period of time, which is called DRX Duration (DRX On Duration), and is controlled by a DRX Duration Timer (DRX On Duration Timer), and the Duration of the Timer can be set by parameters. Referring to fig. 6, the interval duration of two DRX durations is the DRX Cycle (DRX Cycle) of the DRX mode.

Referring to fig. 6, the terminal is configured with several consecutive DRX cycles. One DRX cycle includes a plurality of DRX active periods, wherein one DRX active period is a DRX duration and the remaining DRX active periods can be configured. The multiple DRX active periods constitute DRX active periods, which may be continuous or discontinuous, and are drawn by taking discontinuity as an example in fig. 6.

It should be noted that the DRX-related information (e.g., DRX active time, DRX cycle, DRX duration, DRX inactive time, etc.) in the embodiments of the present application all refers to information of the sidelink.

In order to solve the problems in the background art, an embodiment of the present application provides a data transmission method, where a resource allocation mode of a sending terminal is mode-2, that is, the sending terminal autonomously selects a resource, and sends sideline data to a receiving terminal according to the selected resource, and as shown in fig. 7, the method includes:

701. a first listening window is determined.

The main body of step 701 may be a communication device, such as a sending terminal, a chip in the sending terminal, a system on chip in the sending terminal, and the like. The method provided by the present application is exemplified below by taking the communication device as a sending terminal, but the present invention is not limited thereto.

The transmitting terminal communicates with the receiving terminal in a DRX mode. The information related to the DRX mode in the embodiment of the present application refers to information related to the DRX mode of the transmitting terminal. For example, the DRX active time, DRX duration, etc. in the following each refer to the DRX active time, DRX duration, etc. of the transmitting terminal.

The transmitting terminal may determine a first listening window at time n. The time n may be a time unit n, and specifically may be a slot n, a subframe n, a symbol n, or the like.

In step 701, in a specific implementation, if a Physical (PHY) layer of the transmitting terminal is triggered by a Medium Access Control (MAC) at time n to perform resource selection according to an interception result, the transmitting terminal determines to perform resource selection at time n, and further determines a first interception window at time n. The MAC layer may trigger the PHY layer to select resources when there is data to be transmitted.

Wherein the first listening window is n-t in the above ₀ ，n-t _proc，0 ]。

702. And determining a selection window according to the first listening window and the first time period, and determining the first resource in the selection window.

Wherein the first period of time includes a portion or all of the DRX active time. In a specific implementation of step 702, the sending terminal determines a selection window according to the first listening window and the first time period, determines available resources in the selection window (for example, the specific process may refer to the above, and is not described again), and determines the first resource in the available resources, for example, randomly selects one time-frequency resource from the available time-frequency resources as the first resource.

Optionally, the first time period has the following three cases (denoted as case 1 to case 3).

Case 1, the first period of time is the full DRX active time in the first listening window.

In case 1, the transmitting terminal may determine all DRX active times in the first listening window according to the DRX configuration, and thus determine the first period.

In case 1, exemplarily, referring to (a) in fig. 8, if the first listening window is the first listening window 1, the first time period includes: t1, T2 and T3; if the first listening window is the first listening window 2, the first time period includes: t3, T4, and T5. For example, referring to fig. 8 (b), if the first listening window is the first listening window 1, the first time period includes: t1, T2 and T3; if the first listening window is the first listening window 2, the first time period includes: t1, T2, T3, T4 and T5.

Case 2, the first time period is a DRX duration in the first listening window.

As can be seen from the above, the DRX duration is a fraction of the total DRX active time. That is, the partial DRX active time is the DRX duration.

In case 2, the transmitting terminal may determine the entire DRX duration in the first listening window according to the DRX configuration, thereby determining the first period.

In case 2, exemplarily, referring to (a) in fig. 8, if the first listening window is the first listening window 1, the first time period includes: t1; if the first listening window is the first listening window 2, the first time period includes: t4. Exemplarily, referring to (b) in fig. 8, if the first listening window is the first listening window 1, the first time period includes: t1; if the first listening window is the first listening window 2, the first time period includes: t1 and T4.

Case 3, the first period of time is a partial DRX active time in the first listening window, the partial DRX active time including at least a DRX duration.

In case 3, which DRX activation time belongs to the first time period may be preset, may also be configured by the access network device for the sending terminal, and may also be specified by a protocol, which is not limited in this application.

In case 3, for example, referring to fig. 9, if the first listening window is first listening window 1, the first time period may include: t1 and T2; if the first listening window is the first listening window 2, the first time period may include: t1, T2 and T4.

In addition to the above cases 1 to 3, the first period may also be other DRX active time, for example, DRX active time not including DRX duration, and the application is not limited.

When the first listening window and the first time period overlap, the specific implementation of step 702 is different, and the following description will be made by using cases (1) and (2), respectively. It is to be understood that, in the above cases 1 to 3, since the first period is determined within the first listening window, the first period, i.e., a portion where the first listening window and the first period overlap.

Case (1): the portion of the first listening window and the first time period that overlap is less than or equal to a first threshold.

The case (1) includes: the first listening window and the first time period are not overlapped (that is, the sending terminal is always in an inactive state in the first listening window), or a part of the first listening window overlapped with the first time period is greater than 0 and less than or equal to a first threshold (that is, the time that the sending terminal is in an active state in the first listening window is greater than 0 and less than or equal to the first threshold).

The case (1) can also be understood as: the total number of the time slots of the sending terminal in the receiving state in the first listening window is less than or equal to the preset number of the time slots.

In case (1), step 702, when implemented, may include: a second listening window and a selection window (denoted as first selection window) are determined, the second listening window being located after the first listening window, the first selection window being located after the second listening window. Specifically, the first listening window is located before time n, and the second listening window is located after time n.

In this case, the step 703 may include, in a specific implementation: and determining the first resource in the first selection window according to the interception result in the second interception window.

Optionally, the time interval between the second listening window and the first selection window is greater than or equal to the time required for processing the listening result and determining the first resource.

Optionally, referring to fig. 10, the starting time of the second listening window is (n + t) _A ) The end time is (n + t) _B )。

Wherein t is more than or equal to 0 _A ＜t _B ，t _A Greater than or equal to the time required to determine the first listening window, the second listening window, and the first selection window. Since this time period depends on the device capability of the transmitting terminal and can be so short as to be ignored, t at this time _A ＝0。

In addition, t _B < second threshold. Wherein the second threshold may be the remaining PDB. Alternatively, referring to fig. 10, the start time of the first selection window is (n + t) _B +t _D +t _E ) The end time is (n + t) _F )。

Wherein, t _D ≥0，t _D Greater than or equal to the time required to process the snoop results. Since this time period depends on the device capabilities of the transmitting terminal and can be so short as to be ignored, t is then _D ＝0。t _E ≥0，t _E Greater than or equal to the time required to determine the first resource. Since this time period depends on the device capabilities of the transmitting terminal and can be so short as to be ignored, t is then _E ＝0。

In addition, t _B +t _D +t _E ＜t _F Is less than or equal to the second threshold value.

Exemplary, t _F May be the above-mentioned t ₂ 。

In case (1), it can be understood that, if the sending terminal is to listen in the second listening window, the sending terminal is to be in an active state in the second listening window, and therefore, optionally, the method further includes:

if the state at the starting moment of the second listening window is the non-activated state of the DRX, switching to the activated state of the DRX and at least continuing the activated state of the DRX until the second listening window is finished; or,

and if the state at the starting moment of the second listening window is the active state of the DRX, continuing the active state of the DRX at least until the second listening window is ended.

Optionally, after the second listening window is ended, the sending terminal may switch the active state of DRX to the inactive state of DRX again.

Under the condition (1), the overlapping part of the first listening window and the first time period is less than or equal to the first threshold, the sending terminal cannot obtain enough listening information, so that the listening result cannot completely reflect the use condition of the channel, therefore, the sending terminal can only randomly select resources in the existing selection window or determine the incomplete listening result according to the insufficient listening information, the collision probability of the resources selected by the sending terminal and the resources selected by other terminals is increased, and the transmission reliability of the whole system is further reduced. According to the method provided by the embodiment of the application, the sending terminal determines the second listening window and the first selection window and performs resource selection in the first selection window, so that the resource conflict probability can be reduced, and the transmission reliability can be improved. With the reduction of the resource conflict probability, the times of selecting resources by the sending terminal are reduced, so that the method provided by the embodiment of the application can also improve the resource utilization rate.

Case (2): the overlapping part of the first listening window and the first time period is greater than the first threshold, that is, the time of the sending terminal in the activated state in the first listening window is greater than the first threshold.

The case (2) can also be understood as: the total number of the time slots of the sending terminal in the receiving state in the first listening window is larger than the preset number of the time slots.

In case (2), step 702 may include, when implemented: according to the first detectionThe listening result in the part where the listening window and the first time period overlap determines the first resource in a selection window (denoted as a second selection window), and the second selection window is located after the first listening window. In particular, the second selection window is [ n + t ] above ₁ ，n+t ₂ ]After time n.

In the above embodiment, the first threshold may be recorded as Th _{ses_DRX} 。Th _{ses_DRX} The configuration may be predefined or preset or protocol-specified or configured for the sending terminal by the access network device, and may also be determined in other manners, which is not limited in this application. Th _{ses_DRX} May correspond to the units used in defining the listening windows and the range of the selection window, e.g. Th _{ses_DRX} May be an integer value in units of seconds, milliseconds, or time slots, etc.

In the above embodiment, optionally, the first selection window is located within the second selection window. That is, the first selection window is a reduced selection window compared to the second selection window. The resource is selected within the range of not exceeding the original selection window, and the time delay requirement of the data packet can be ensured.

703. Data is transmitted on the first resource.

In step 703, in a specific implementation, the sending terminal may send data to the receiving terminal on the first resource.

According to the method provided by the embodiment of the application, the DRX activation time of the sending terminal is considered when the resource selection is carried out, so that the selection window is determined according to the DRX activation time of the sending terminal, the resource selection is carried out more reasonably, the collision probability of the resource used by the sending terminal and the resource used by other terminals is reduced, and the transmission reliability is improved.

In the above embodiments, in order to distinguish from the existing listening window (i.e. the first listening window in the present application), the second listening window may be referred to as an extended sensing window. For the first listening window, the resource in the second selection window is a Candidate resource (Candidate Resources), and for the second listening window, the resource in the first selection window is a Candidate resource.

In practical implementation, if the sending terminal is not configured with the DRX mode, the sending terminal may select resources by using an existing method. If the sending terminal is configured with the DRX mode, the sending terminal can adopt the method provided by the application to select the resources.

It should be noted that, on the sidelink, the DRX active time may include only the DRX duration, in which case, the DRX active time and the DRX duration are substantially the same, and in this case, the first time period may include all DRX durations in the first listening window.

In order to make the method provided by the embodiment of the present application clearer, an implementation flow of the method provided by the above embodiment is exemplarily illustrated below by using fig. 11, and referring to fig. 11, the flow includes:

1101. the transmitting terminal is triggered for resource selection at time n.

1102. The sending terminal determines a first listening window.

1103. The transmitting terminal determines whether a portion of the first listening window overlapping the first time period is greater than a first threshold.

If not, go to step 1104 to step 1107, and if yes, go to step 1108 to step 1110.

1104. The transmitting terminal determines the second listening window and the first selection window.

1105. The sending terminal switches the inactive state to the active state, or maintains the active state to enable the sending terminal in the second listening window to be in the active state.

1106. And the transmitting terminal determines the available resources in the first selection window according to the interception result in the second interception window.

1107. The transmitting terminal determines a first resource within the available resources in the first selection window.

1108. The transmitting terminal determines the second selection window.

1109. And the transmitting terminal determines available resources in the second selection window according to the interception result in the first interception window.

1110. The transmitting terminal determines the first resource within the available resources in the second selection window.

1111. The transmitting terminal transmits data to the receiving terminal on the first resource.

In the embodiment of the present application, each listening window and each selection window may be defined by taking a time slot as a unit, and may also be defined by other time units, which is not limited in the present application.

The method provided in the embodiment of the present application may be applied to a scenario of direct communication between two terminals, and may also be applied to a terminal relay (relay) scenario (i.e., a scenario in which a certain terminal/some terminals provide relay service for other terminals) or a terminal cooperation (coordination) scenario, which is not limited in the present application.

The above description has presented the embodiments of the present application primarily from a method perspective. It is to be understood that each network element, e.g. the communication device, for implementing the above-mentioned functions, comprises at least one of a corresponding hardware structure and software modules for performing the respective functions. Those of skill in the art would readily appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as hardware or combinations of hardware and computer software. Whether a function is performed as hardware or computer software drives hardware depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.

In the embodiment of the present application, the communication apparatus may be divided into the functional units according to the method example, for example, each functional unit may be divided corresponding to each function, or two or more functions may be integrated into one processing unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit. It should be noted that, in the embodiment of the present application, the division of the unit is schematic, and is only one logic function division, and when the actual implementation is realized, another division manner may be provided.

Exemplarily, fig. 12 shows a schematic diagram of a possible structure of a communication device (referred to as a communication device 120) in the above embodiment, where the communication device 120 includes a processing unit 1201 and a transceiving unit 1202. Optionally, a storage unit 1203 is further included. The communication device 120 may be used to illustrate the structure of the transmitting terminal in the above-described embodiments.

Specifically, the processing unit 1201 is configured to control and manage actions of the sending terminal, for example, the processing unit 1201 is configured to execute the steps in fig. 7, the steps in fig. 11, and/or actions performed by the sending terminal in other processes described in this embodiment of the present application. The processing unit 1201 may communicate with other network entities, e.g. with a receiving terminal, via the transceiving unit 1202. The storage unit 1203 is used to store program codes and data of the transmitting terminal.

The communication device 120 may be a terminal or a chip or a system of chips, for example.

When the communication apparatus 120 is a terminal, the processing unit 1201 may be a processor; the transceiver unit 1202 may be a communication interface, a transceiver, or an input interface and/or an output interface. Alternatively, the transceiver may be a transceiver circuit. Alternatively, the input interface may be an input circuit and the output interface may be an output circuit.

When the communication device 120 is a chip or a chip system, the transceiving unit 1202 can be a communication interface, an input interface and/or an output interface, an interface circuit, an output circuit, an input circuit, a pin or a related circuit, etc. on the chip or the chip system. The processing unit 1201 may be a processor, a processing circuit, a logic circuit, or the like.

Illustratively, the communication device in the embodiment of the present application includes a processor and a transceiver to implement the corresponding functions of the communication device in the method provided in the foregoing embodiment.

Specifically, the processor is configured to determine a first listening window, determine a selection window according to the first listening window and a first time period, and determine a first resource in the selection window; wherein the first time period comprises a part of or all DRX activation time; a transceiver to transmit data on a first resource.

Optionally, the overlapping portion of the first listening window and the first time period is less than or equal to a first threshold, and the processor is specifically configured to determine a second listening window and a selection window, where the second listening window is located after the first listening window, and the selection window is located after the second listening window.

Optionally, the processor is specifically configured to: and determining the first resource in the selection window according to the interception result in the second interception window.

Optionally, the processor is further configured to switch to an active state of DRX and continue the active state of DRX at least until the second listening window ends when the state of the starting time of the second listening window is an inactive state of DRX; or, the processor is further configured to, when the state of the start time of the second listening window is the active state of DRX, continue the active state of DRX at least until the second listening window ends.

Optionally, the time interval between the second listening window and the selection window is greater than or equal to the time required for processing the listening result and determining the first resource.

Optionally, the first listening window is determined by the processor at time n, and the starting time of the second listening window is (n + t) _A ) The end time is (n + t) _B )，t _A Greater than or equal to the time required for determining the first listening window, the second listening window and the selection window, t is greater than or equal to 0 _A ＜t _B 。

Optionally, the starting time of the selection window is (n + t) _B +t _D +t _E ) The end time is (n + t) _F )，t _D Greater than or equal to the time required to process the interception result, t _D ≥0，t _E Greater than or equal to the time, t, required to determine the first resource _E ≥0，t _B +t _D +t _E ＜t _F Is less than or equal to the second threshold value.

Optionally, the overlapping portion of the first listening window and the first time period is greater than a first threshold, and the processor is specifically configured to determine the first resource in the selection window according to a listening result in the overlapping portion of the first listening window and the first time period, where the selection window is located after the first listening window.

Optionally, the first period of time is the total DRX activation time in the first listening window; alternatively, the first period of time is a DRX duration in the first listening window.

The integrated unit in fig. 12 may be stored in a computer-readable storage medium if it is implemented in the form of a software functional module and sold or used as a separate product. Based on such understanding, the technical solutions of the embodiments of the present application may be substantially or partially contributed to by the prior art, or all or part of the technical solutions may be embodied in a software product, which is stored in a storage medium and includes several instructions, so that a computer device (which may be a personal computer, a server, an access network device, or the like) or a processor (processor) executes all or part of the steps of the methods described in the embodiments of the present application. A storage medium storing a computer software product comprising: various media capable of storing program codes, such as a usb disk, a removable hard disk, a read-only memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.

The embodiment of the present application further provides a schematic diagram of a hardware structure of a communication device, referring to fig. 13 or fig. 14, the communication device includes a processor 1301, and optionally, further includes a memory 1302 connected to the processor 1301.

The processor 1301 may be a general processing unit (CPU), a microprocessor, an application-specific integrated circuit (ASIC), or one or more ics for controlling the execution of programs in accordance with the present disclosure. The processor 1301 may also include multiple CPUs, and the processor 1301 may be a single-core (single-CPU) processor or a multi-core (multi-CPU) processor. A processor herein may refer to one or more devices, circuits, or processing cores that process data, such as computer program instructions.

The memory 1302 may be a ROM or other type of static storage device that can store static information and instructions, a RAM or other type of dynamic storage device that can store information and instructions, an EEPROM (electrically erasable programmable read-only memory), a CD-ROM (compact disk read-only memory) or other optical disk storage, an optical disk storage (including a compact disk, a laser disk, an optical disk, a digital versatile disk, a blu-ray disk, etc.), a magnetic disk storage medium or other magnetic storage device, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer, and is not limited in this respect. The memory 1302 may be separate (in which case the processor may be external or internal to the communication device) or may be integrated with the processor 1301. The memory 1302 may include, among other things, computer program code. The processor 1301 is configured to execute the computer program code stored in the memory 1302, thereby implementing the methods provided by the embodiments of the present application.

In a first possible implementation, referring to fig. 13, the communication device further includes a transceiver 1303. The processor 1301, the memory 1302, and the transceiver 1303 are connected by a bus. The transceiver 1303 is used for communication with other devices or communication networks. Optionally, the transceiver 1303 may include a transmitter and a receiver. The device for implementing the receiving function in the transceiver 1303 may be regarded as a receiver, and the receiver is configured to perform the receiving step in the embodiment of the present application. The device for implementing the transmitting function in the transceiver 1303 may be regarded as a transmitter, and the transmitter is used for executing the transmitting step in the embodiment of the present application.

Based on the first possible implementation manner, the schematic structure diagram shown in fig. 13 may be used to illustrate the structure of the sending terminal in the foregoing embodiment. Specifically, the processor 1301 is configured to control and manage an action of the sending terminal, for example, the processor 1301 is configured to execute the steps in fig. 7, the steps in fig. 11, and/or actions performed by the sending terminal in other processes described in this embodiment of the present application. The processor 1301 can communicate with other network entities, e.g., with a receiving terminal, through the transceiver 1303. The memory 1302 is used for storing program codes and data of the transmitting terminal.

In a second possible implementation, the processor 1301 comprises logic circuitry and at least one of an input interface and an output interface. Illustratively, the output interface is for performing the act of transmitting in the respective method and the input interface is for performing the act of receiving in the respective method.

Based on the second possible implementation manner, referring to fig. 14, the schematic structure diagram shown in fig. 14 may be used to illustrate the structure of the sending terminal involved in the foregoing embodiment. Specifically, the processor 1301 is configured to control and manage actions of the sending terminal, for example, the processor 1301 is configured to execute the steps in fig. 7, the steps in fig. 11, and/or actions performed by the sending terminal in other processes described in this embodiment of the present application. The processor 1301 can communicate with other network entities, for example with a receiving terminal, via at least one of the input interface and the output interface. The memory 1302 is used for storing program codes and data of the transmitting terminal.

In implementation, the steps of the method provided by this embodiment may be implemented by hardware integrated logic circuits in a processor or instructions in the form of software. The steps of the method disclosed in connection with the embodiments of the present application may be directly implemented by a hardware processor, or implemented by a combination of hardware and software modules in a processor.

In addition, the embodiment of the present application further provides a schematic diagram of a hardware structure of a sending terminal (denoted as sending terminal 150), which may specifically refer to fig. 15.

Fig. 15 is a schematic diagram of the hardware configuration of the transmitting terminal 150. For convenience of explanation, fig. 15 shows only main components of the transmitting terminal. As shown in fig. 15, transmitting terminal 150 includes a processor, a memory, a control circuit, an antenna, and an input-output device.

The processor is mainly configured to process the communication protocol and the communication data, and control the entire sending terminal, execute a software program, and process data of the software program, for example, to control the sending terminal to perform some or all of the steps in fig. 7, the steps in fig. 11, and other actions performed by the sending terminal in other processes described in this embodiment of the present application. The memory is used primarily for storing software programs and data. The control circuit (also referred to as a radio frequency circuit) is mainly used for converting baseband signals and radio frequency signals and processing the radio frequency signals. The control circuit and the antenna together, which may also be called a transceiver, are mainly used for transceiving radio frequency signals in the form of electromagnetic waves. Input and output devices, such as touch screens, display screens, keyboards, etc., are used primarily for receiving data input by a user and for outputting data to the user.

When the transmitting terminal is started, the processor can read the software program in the memory, interpret and execute the instruction of the software program, and process the data of the software program. When data needs to be sent through the antenna, the processor performs baseband processing on the data to be sent, and then outputs baseband signals to a control circuit in the control circuit, and the control circuit performs radio frequency processing on the baseband signals and then sends the radio frequency signals to the outside through the antenna in the form of electromagnetic waves. When data is transmitted to the transmitting terminal, the control circuit receives radio frequency signals through the antenna, converts the radio frequency signals into baseband signals and outputs the baseband signals to the processor, and the processor converts the baseband signals into the data and processes the data.

Those skilled in the art will appreciate that fig. 15 shows only one memory and processor for the sake of illustration. In an actual terminal, there may be multiple processors and memories. The memory may also be referred to as a storage medium or a storage device, and the like, which is not limited in this application.

As an alternative implementation manner, the processor may include a baseband processor and a central processing unit, where the baseband processor is mainly used to process a communication protocol and communication data, and the central processing unit is mainly used to control the entire transmitting terminal, execute a software program, and process data of the software program. The processor in fig. 15 integrates the functions of the baseband processor and the central processing unit, and those skilled in the art will understand that the baseband processor and the central processing unit may also be independent processors, and are interconnected through a bus or the like. Those skilled in the art will appreciate that the transmitting terminal may include a plurality of baseband processors to accommodate different network formats, a plurality of central processors to enhance its processing capability, and various components of the transmitting terminal may be connected by various buses. The baseband processor may also be expressed as a baseband processing circuit or a baseband processing chip. The central processing unit can also be expressed as a central processing circuit or a central processing chip. The function of processing the communication protocol and the communication data may be built in the processor, or may be stored in the memory in the form of a software program, and the processor executes the software program to realize the baseband processing function.

Embodiments of the present application also provide a computer-readable storage medium, which includes instructions that, when executed on a computer, cause the computer to perform any of the above methods.

Embodiments of the present application also provide a computer program product containing instructions which, when run on a computer, cause the computer to perform any of the methods described above.

An embodiment of the present application further provides a communication system, including: a receiving terminal and the transmitting terminal in the above embodiments. Optionally, the system further includes an access network device.

An embodiment of the present application further provides a communication apparatus, including: the system comprises a processor and an interface circuit, wherein the interface circuit is used for receiving code instructions and transmitting the code instructions to the processor, and the processor is used for executing the code instructions to execute any one method provided by the embodiment.

In the above embodiments, all or part of the implementation may be realized by software, hardware, firmware, or any combination thereof. When implemented using a software program, it may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. The procedures or functions described in accordance with the embodiments of the present application are all or partially generated upon loading and execution of computer program instructions on a computer. The computer may be a general purpose computer, a special purpose computer, a network of computers, or other programmable device. The computer instructions may be stored on a computer readable storage medium or transmitted from one computer readable storage medium to another computer readable storage medium, for example, the computer instructions may be transmitted from one website, computer, server, or data center to another website, computer, server, or data center via wire (e.g., coaxial cable, fiber optic, Digital Subscriber Line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.). Computer-readable storage media can be any available media that can be accessed by a computer or can comprise one or more data storage devices, such as servers, data centers, and the like, that can be integrated with the media. The usable medium may be a magnetic medium (e.g., floppy disk, hard disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium (e.g., Solid State Drive (SSD)), among others.

While the present application has been described in connection with various embodiments, other variations to the disclosed embodiments can be understood and effected by those skilled in the art in practicing the claimed application, from a review of the drawings, the disclosure, and the appended claims. In the claims, the word "comprising" does not exclude other elements or steps, and the word "a" or "an" does not exclude a plurality. A single processor or other unit may fulfill the functions of several items recited in the claims. The mere fact that certain measures are recited in mutually different dependent claims does not indicate that a combination of these measures cannot be used to advantage.

Although the present application has been described in conjunction with specific features and embodiments thereof, it will be evident that various modifications and combinations may be made thereto without departing from the spirit and scope of the application. Accordingly, the specification and drawings are merely illustrative of the present application as defined in the appended claims and are intended to cover any and all modifications, variations, combinations, or equivalents within the scope of the application. It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.

Claims

A method of data transmission, comprising:

determining a first listening window;

determining a selection window according to the first listening window and a first time period, wherein the first time period comprises part or all of Discontinuous Reception (DRX) activation time;

determining a first resource within the selection window;

transmitting data on the first resource.
The method of claim 1, wherein determining a selection window based on the first listening window and a first time period comprises:

and determining a second listening window and the selection window, wherein the overlapping part of the first listening window and the first time period is less than or equal to a first threshold value, the second listening window is positioned after the first listening window, and the selection window is positioned after the second listening window.
The method of claim 2, wherein determining the first resource within the selection window comprises:

and determining the first resource in the selection window according to the interception result in the second interception window.
A method according to claim 2 or 3, characterized in that the method further comprises:

if the state at the starting moment of the second listening window is the non-activated state of the DRX, switching to the activated state of the DRX and at least continuing the activated state of the DRX until the second listening window is finished; or,

and if the state at the starting moment of the second listening window is the active state of the DRX, continuing the active state of the DRX at least until the second listening window is ended.
The method according to any of claims 2-4, wherein the time interval between the second listening window and the selection window is greater than or equal to the time required for processing the listening result and determining the first resource.
Method according to any one of claims 2 to 5, wherein said first listening window is determined at a time n and said second listening window starts at a time (n + t) _A ) The end time is (n + t) _B )，t _A Greater than or equal to the time required for determining the first listening window, the second listening window and the selection window, t is greater than or equal to 0 _A ＜t _B 。
The method of claim 6, wherein the start time of the selection window is (n + t) _B +t _D +t _E ) The end time is (n + t) _F ) Said t is _D Greater than or equal to the time required to process the interception result, t _D Not less than 0, said t _E Greater than or equal to the time, t, required to determine the first resource _E ≥0，t _B +t _D +t _E ＜t _F Is less than or equal to the second threshold value.
The method of claim 1, wherein determining a selection window based on the first listening window and a first time period, wherein determining a first resource within the selection window comprises:

the overlapping part of the first listening window and the first time period is larger than a first threshold value, and the first resource is determined in the selection window according to the listening result in the overlapping part of the first listening window and the first time period, wherein the selection window is positioned behind the first listening window.
The method according to any one of claims 1 to 8,

the first time period is the total DRX activation time in the first listening window; or,

the first time period is a DRX duration in the first listening window.
A communication apparatus, characterized in that the apparatus comprises a processing unit and a transceiving unit;

the processing unit is used for determining a first listening window, determining a selection window according to the first listening window and a first time period, and determining a first resource in the selection window; wherein the first time period comprises part or all of a Discontinuous Reception (DRX) activation time;

the transceiver unit is configured to transmit data on the first resource.
The apparatus of claim 10,

the processing unit is specifically configured to determine a second listening window and the selection window, where the second listening window is located after the first listening window, and the selection window is located after the second listening window.
The apparatus according to claim 11, wherein the processing unit is specifically configured to:

and determining the first resource in the selection window according to the interception result in the second interception window.
The apparatus of claim 11 or 12,

the processing unit is further configured to switch to an active state of DRX and continue the active state of DRX at least until the second listening window ends when the state of the starting time of the second listening window is an inactive state of DRX; or,

the processing unit is further configured to, when the state of the starting time of the second listening window is an active state of DRX, continue the active state of DRX at least until the second listening window ends.
The apparatus according to any of claims 11-13, wherein a time interval between the second listening window and the selection window is greater than or equal to a time required to process the listening result and determine the first resource.
The apparatus according to any of claims 11-14, wherein said first listening window is determined by said processing unit at time n and said second listening window starts at (n + t) _A ) The end time is (n + t) _B )，t _A Greater than or equal to the time required to determine the first listening window, the second listening window and the selection window, t is greater than or equal to 0 _A ＜t _B 。
The apparatus of claim 15, wherein the start time of the selection window is (n + t) _B +t _D +t _E ) The end time is (n + t) _F ) Said t is _D Greater than or equal to the time required to process the interception result, t _D Not less than 0, said t _E Greater than or equal to the time, t, required to determine said first resource _E ≥0，t _B +t _D +t _E ＜t _F Is less than or equal to the second threshold value.
The apparatus of claim 10,

the processing unit is specifically configured to determine the first resource in the selection window according to an interception result in the overlapping portion of the first listening window and the first time period, and the selection window is located after the first listening window.
The apparatus of any one of claims 10-17,

the first time period is the total DRX activation time in the first listening window; or,

the first time period is a DRX duration in the first listening window.
A communications apparatus, comprising: a processor;

the processor is coupled to a memory for storing computer-executable instructions, which the processor executes to cause the communication device to implement the method of any one of claims 1-9.
A communications apparatus, comprising: a processor and an interface circuit;

the interface circuit is used for receiving code instructions and transmitting the code instructions to the processor;

the processor to execute the code instructions to perform the method of any one of claims 1-9.
A readable storage medium storing computer instructions that, when executed, cause the method of any one of claims 1-9 to be implemented.