CN114402678A - Method and device for determining resource selection window, electronic equipment and readable storage medium - Google Patents

Abstract

The disclosure provides a method and a device for determining a resource selection window, an electronic device and a readable storage medium. The method for determining the resource selection window comprises the following steps: determining a first moment, wherein the first moment is the moment of selecting resources; acquiring reserved transmission resources at the first moment; and determining a resource selection window at the first moment according to the time domain position of the reserved transmission resource at the first moment. The present disclosure implements a method for determining a resource selection window in resource selection according to a time domain location of a reserved transmission resource.

Description

Method and device for determining resource selection window, electronic equipment and readable storage medium Technical Field

The present disclosure relates to the field of communications technologies, and in particular, to a method and an apparatus for determining a resource selection window, an electronic device, and a readable storage medium.

Background

When a User Equipment (UE) transmits a signal, it needs to select a resource for transmitting the signal, but if the resource selected by the UE conflicts with a resource selected by another UE, the UE may need to re-select the resource.

Disclosure of Invention

It is an object of the present disclosure to be able to determine a resource selection window at resource selection from reserved transmission resources at resource selection.

According to an aspect of the present disclosure, a method for determining a resource selection window is provided, including: determining a first moment, wherein the first moment is the moment of selecting resources; acquiring reserved transmission resources at the first moment; and determining a resource selection window at the first moment according to the time domain position of the reserved transmission resource at the first moment.

According to another aspect of the present disclosure, an apparatus for determining a resource selection window is provided, including: the device comprises a first time determining module, a resource selecting module and a resource selecting module, wherein the first time determining module is configured to determine a first time which is the time for selecting resources; a reserved resource acquisition module configured to acquire reserved transmission resources at the first time; and the selection window determining module is configured to determine the resource selection window at the first moment according to the time domain position of the reserved transmission resource at the first moment.

According to another aspect of the present disclosure, an electronic device is provided, which includes a storage unit, a processing unit; the storage unit is used for storing a program for determining the resource selection window; the processing unit is configured to run a program for determining a resource selection window, and when the program for determining a resource selection window is executed, run the method for determining a resource selection window according to the foregoing embodiment.

According to another aspect of the present disclosure, there is provided a readable storage medium including: a memory storing a program that determines a resource selection window; the processor runs a program for determining the resource selection window, and when the program for determining the resource selection window is executed, the method for determining the resource selection window is run as described in the above embodiment.

In the scheme of this embodiment, a first time for resource selection is determined, and reserved transmission resources at the first time are obtained. Therefore, the present embodiment can determine the resource selection window at the first time according to the time domain position of the reserved transmission resource at the first time.

Drawings

Fig. 1 is a schematic diagram of an embodiment of a transmission mode a of the present disclosure;

fig. 2 is a schematic diagram of an embodiment of transmission mode B of the present disclosure;

FIG. 3 is a schematic diagram of the resource selection method based on interception in the present disclosure;

FIG. 4 is a schematic diagram of resource conflict and implementation of chained resource selection or reservation according to the present disclosure;

FIG. 5 is a flow diagram of one embodiment of a method of determining a resource selection window according to the present disclosure;

FIG. 6 is a flowchart of an embodiment of the present disclosure based on step S510 of FIG. 5;

FIG. 7 is a flowchart of another embodiment of the present disclosure based on step S510 of FIG. 5;

FIG. 8 is a flowchart of an embodiment of the present disclosure based on step S530 of FIG. 5;

FIG. 9 is a schematic diagram of one embodiment of determining a resource selection window based on the manner of FIG. 8 according to the present disclosure;

fig. 10 is a flowchart of another embodiment of the present disclosure based on step S530 of fig. 5;

FIG. 11 is a flowchart of an embodiment of the present disclosure based on step S534 of FIG. 10;

fig. 12 is a flowchart of another embodiment of the present disclosure based on step S534 of fig. 10;

FIG. 13 is a schematic diagram of one embodiment of determining a resource selection window based on the approaches of FIGS. 11 and 12 according to the present disclosure;

FIG. 14 is a schematic diagram of another embodiment of the present disclosure for determining a resource selection window based on the approaches of FIGS. 11 and 12;

FIG. 15 is a schematic diagram of yet another embodiment of the present disclosure for determining a resource selection window based on the approaches of FIGS. 11 and 12;

FIG. 16 is a schematic diagram of yet another embodiment of the present disclosure for determining a resource selection window based on the approaches of FIGS. 11 and 12;

FIG. 17 is a flowchart of yet another embodiment of the present disclosure based on step S530 of FIG. 5;

FIG. 18 is a flowchart of an embodiment of the present disclosure based on step S536 of FIG. 17;

fig. 19 is a flowchart of another embodiment of the present disclosure based on step S536 of fig. 17;

FIG. 20 is a schematic diagram of one embodiment of determining a resource selection window based on the approaches of FIGS. 18 and 19 according to the present disclosure;

FIG. 21 is a schematic diagram of another embodiment of the present disclosure for determining a resource selection window based on the approaches of FIGS. 18 and 19;

FIG. 22 is a schematic diagram of yet another embodiment of the present disclosure for determining a resource selection window based on the approaches of FIGS. 18 and 19;

FIG. 23 is a schematic diagram of yet another embodiment of the present disclosure for determining a resource selection window based on the approaches of FIGS. 18 and 19;

FIG. 24 is a block diagram illustrating an embodiment of an apparatus for determining a resource selection window according to the present disclosure;

fig. 25 is a schematic structural diagram of an embodiment of an electronic device according to the present disclosure.

Detailed Description

Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many different forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The drawings are merely schematic illustrations of the present disclosure and are not necessarily drawn to scale. The same reference numerals in the drawings denote the same or similar parts, and thus their repetitive description will be omitted.

Furthermore, the described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided to give a thorough understanding of embodiments of the disclosure. One skilled in the relevant art will recognize, however, that the subject matter of the present disclosure can be practiced without one or more of the specific details, or with other methods, components, devices, steps, and the like. In other instances, well-known structures, methods, devices, implementations, or operations are not shown or described in detail to avoid obscuring aspects of the disclosure.

In the present disclosure, unless expressly stated or limited otherwise, the terms "connected" and "connected" are to be construed broadly, e.g., as meaning either a fixed connection or a removable connection, or an integral part; can be electrically connected or can be communicated with each other; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present disclosure can be understood by those of ordinary skill in the art as appropriate.

Further, in the description of the present disclosure, "a plurality" means at least two, e.g., two, three, etc., unless explicitly specifically limited otherwise. "and/or" describes the association relationship of the associated objects, and means that there may be three relationships, for example, a and/or B, and that there may be three cases of a alone, B alone, and a and B simultaneously. The symbol "/" generally indicates that the former and latter associated objects are in an "or" relationship. The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.

As used herein, "user terminal", "terminal", and "terminal device" include both devices that are wireless signal receivers, devices that have only wireless signal receivers without transmit capability, and devices that have receive and transmit hardware, devices that have receive and transmit hardware capable of two-way communication over a two-way communication link, as will be understood by those skilled in the art. Such a device may include: a cellular or other communications device having a single line display or a multi-line display or a cellular or other communications device without a multi-line display: PCS (personal communication service), which may combine voice, data processing, facsimile and/or data communication capabilities; a PDA (personal digital assistant) which may include a radio frequency receiver, a pager, internet/intranet access, web browser, notepad, calendar and/or GPS (global positioning system) receiver; a conventional laptop and/or palmtop computer or other device having and/or including a radio frequency receiver. As used herein, a "terminal" or "terminal device" may be portable, transportable, installed in a vehicle (aeronautical, maritime, and/or land-based), or situated and/or configured to operate locally and/or in a distributed fashion at any other location(s) on earth and/or in space. As used herein, a "terminal device" may also be a communication terminal, an internet access terminal, and a music/video playing terminal, and may be, for example, a PDA, an MID (mobile internet device), and/or a mobile phone with a music/video playing function, and may also be an intelligent device, a set-top box, and the like.

In LTE (Long Term evolution) and LTE successor systems (e.g., also referred to as LTE-a (LTE Advanced, Long Term evolution Advanced), 4G (the 4th generation mobile communication technology, fourth generation mobile communication technology), FRA (Future Radio Access), 5G (the 5th generation mobile communication technology, fifth generation mobile communication technology), etc., D2D (Device to Device) technology in which direct communication between user terminals is not performed via a Radio base station (eNode, abbreviated as eNB) is being studied.

D2D can reduce traffic between the user terminal and the base station, and can perform communication between the user terminals even when the base station cannot perform communication, such as when a disaster occurs.

D2D can be divided into D2D discovery (D2D discovery) for finding other user terminals capable of communication and D2D communication (also referred to as D2D direct communication, inter-terminal direct communication, etc.) for direct communication between user terminals. Hereinafter, when D2D communication, D2D discovery, and the like are not particularly distinguished, they are simply referred to as D2D. The signal transmitted and received (send and receive) by D2D is referred to as a D2D signal.

Further, in 3GPP (3rd Generation Partnership Project), a technology of implementing V2X (Vehicle to other devices) by extending the D2D function is being studied. Here, V2X is a part of ITS (Intelligent Transport Systems), and is a generic name of V2V representing a communication format performed between vehicles, V2I (vehicle to infrastructure) representing a communication format performed between a vehicle and a roadside unit (RSU) provided on a roadside, V2N (vehicle to mobile terminal) representing a communication format performed between a vehicle and a mobile terminal of a driver, and V2P (vehicle to pedestrian) representing a communication format performed between a vehicle and a mobile terminal of a pedestrian.

Device-to-device communication is a Sidelink (SL) transmission technique based on D2D, and similar to Uplink (UL) and Downlink (DL), there are also Control channels and data channels on the Sidelink, the former is called Physical Sidelink Control Channel (PSCCH), and the latter is called Physical Sidelink Shared Channel (PSCCH). The PSCCH is used for indicating the time-frequency domain resource position, the modulation coding mode, the priority of data carried in the PSCCH and the like of the PSCCH transmission. The PSSCH is used to carry data. Different from the mode that communication data are received or sent through a base station in a traditional cellular system, the vehicle networking system adopts a mode of direct terminal-to-terminal communication, so that the frequency spectrum efficiency is higher and the transmission time delay is lower. Two transmission modes are defined in 3 GPP: mode a and mode B.

Fig. 1 is a schematic diagram of an embodiment of a transmission mode a according to the present disclosure.

As shown in fig. 1, the wireless communication system provided by the present embodiment may include a base station eNB, a user terminal UE1 and a user terminal UE 2. The user terminal UE1 is assumed to represent a transmitting side, and the user terminal UE2 is assumed to represent a receiving side, but both the user terminal UE1 and the user terminal UE2 have both functions of a transmitting function and a receiving function. Hereinafter, the user terminal UE1 and the user terminal UE2 will be simply referred to as "user terminal UE" unless they are distinguished from each other. The user terminal UE1 and the user terminal UE2 have a function of cellular communication as the user terminal UE in LTE, and a function of D2D including signal transmission and reception in the above channels, respectively.

The user terminals UE1 and UE2 have functions for executing the operations described in the present embodiment. The cellular communication function and the conventional D2D function may have only a part of the functions (within a range where the operations described in the present embodiment can be performed) or may have all the functions.

Further, each user terminal UE may be any device having the D2D function, for example, each user terminal UE is a terminal held by a vehicle or a pedestrian, an RSU (UE-type RSU having the function of UE), or the like.

The base station eNB has a cellular communication function as a base station eNB in LTE, and a function (a resource allocation function, a setting information notification function, and the like) for enabling communication of the user terminal UE in the present embodiment. The base station eNB includes an RSU (eNB-type RSU having the function of the eNB).

In the mode A, the transmission resource of the user terminal UE is allocated by the base station, and the user terminal UE transmits data on a side uplink according to the resource allocated by the base station; the base station may allocate resources for single transmission to the UE through DL, or may allocate resources for semi-static transmission to the UE. In the LTE-V2X system, this mode a is referred to as mode 3.

Fig. 2 is a schematic diagram of an embodiment of transmission mode B of the present disclosure.

As shown in fig. 2, in mode B, the UE selects a resource from the resource pool for data transmission. Specifically, the UE may select the transmission resource in the resource pool by an interception method, or select the transmission resource in the resource pool by a random selection method. In the LTE-V2X system, this mode B is referred to as mode 4.

In the present embodiment, the user terminal UE performs listening in the listening window to select an unoccupied resource, and transmits the D2D signal using the selected resource. The "listening" is performed, for example, by a method of measuring reception power (may also be referred to as reception energy or reception intensity), a method of receiving and decoding SCI (Sidelink Control Information) transmitted from another user terminal UE to detect the resource location of the allocated SCI and data, or a combination of these methods. The "resource" includes a time resource (e.g., a subframe) or a time and frequency resource (e.g., a subchannel), unless otherwise specified. The "D2D signal" may be SCI, data, or a combination of SCI and data. In addition, the D2D signal may also be a discovery signal.

In V2X, particularly V2V (Vehicle to Vehicle), since user terminals such as vehicles exist at high density and move at high speed, it is not efficient to dynamically allocate resources, and it is assumed that a user terminal autonomously selects resources.

The intercepted resource selection method comprises the following steps:

in LTE-V2X, when a new packet arrives at time n (n is a real number greater than or equal to 0), resource selection is required, and the ue may select from the past, for example, 1 second (s, equal to 1000ms, i.e. at [ n-1000, n-1 ]]In range) in the listening window at [ n + T1, n + T2]Resource selection within a millisecond (ms) resource selection window, where 0<＝T1<＝T _th1Wherein the first time threshold value T_th1For example, the value may be 4ms, and T1 should be selected to be less than or equal to the processing delay T of the ue_proc,1；T _th2<＝T2<＝T _th3Wherein the second time threshold value T_th2For example, the value may be 20ms, and the third time threshold T_th3For example, the value may be 100ms, and the selection of T2 needs to be within the delay requirement of the service (e.g., the maximum transmission delay allowed by the service packet). For example, if the latency requirement of the traffic is 50ms, then 20ms<＝T2<50 ms; if the service is in progressThe delay requirement is 100ms, then 20ms<＝T2<＝100ms。

When a plurality of user terminals autonomously select (including reselecting) a transmission resource, if each user terminal freely selects the resource, resource collision occurs, and the user terminal on the receiving side cannot properly receive a signal.

Therefore, a resource selection method based on sensing is proposed in which sensing of resources is performed to select resources that are not used or occupied. It is assumed that a time window for the user terminal to listen (simply referred to as "listening window") is set in advance, and the size (period) of the listening window may be set to be the same as the period in which the user terminal transmits packets semi-permanently. The user terminal detects unoccupied resources by listening in the listening window. Since it can be determined that the detected resource is not occupied in the resource selection window, the user terminal regards the resource corresponding to the resource that is not occupied as a resource capable of transmitting the D2D signal in the resource selection window, selects a resource from these resources, and starts transmission of the D2D signal.

Fig. 3 is a schematic diagram of the resource selection manner based on interception in the present disclosure.

As shown in FIG. 3, [ n, n +100] ms is assumed as the resource selection window. The frame in the listening window on the left side of the solid arrow above represents the resource that has been occupied by other UEs, and since the other UEs will periodically reserve the corresponding resource, the frame in the resource selection window on the right side of the solid arrow is the resource that the current UE can not select. The frame in the left listening window of the first dotted arrow below indicates resources not occupied by other UEs, therefore, the frame in the right resource selection window of the first dotted arrow is assumed to be the resource selected by the current UE, and the three dotted arrows below indicate resources corresponding to the periodic reservation of the current UE. Here in V2V, it is envisaged that when the user terminal autonomously selects a resource, the resource is not selected each time a packet is transmitted, but the resource once selected is semi-permanently used. In the case of semi-permanently transmitting the D2D signal, the user terminal UE may listen when the transmission of the D2D signal is initially started, and does not need to listen again until the D2D signal is periodically transmitted after the 2 nd time. The user terminal UE may perform the listening in the background in advance (that is, perform the listening at the timing (subframe) when the D2D signal is not transmitted in advance), and may perform the resource reselection when detecting the possibility of signal collision (collision) with another user terminal UE.

In the disclosed embodiment, the selection window is set after the listening window. The size of the selection window needs to be set at least to be equal to or smaller than the size of the listening window. In addition, when considering the effect of shortening the delay, the size of the selection window is preferably shorter than the size of the listening window. In addition, the selection window may not necessarily be set following the listening window. For example, the start position of the selection window may be set after a predetermined offset (several subframes later, etc.) from the end position of the listening window.

To support coexistence of multiple V2X UEs, it is desirable that the V2X UEs 1 be able to consider the resources that the V2X UE2 may occupy when selecting transmission resources. One Resource includes one or more continuous sub-channels, one sub-channel includes N continuous Physical Resource Blocks (PRBs), N is a positive integer greater than or equal to 1, where N is configured or preconfigured by higher layer signaling.

The transmission resource selection method in the related art includes the steps of:

the main process of the terminal for selecting the resource in the selection window is as follows:

the current UE takes all available resources in the selection window as a set A, and the current UE excludes the resources in the set A:

1. if the current UE does not have the monitoring result in some subframes in the monitoring window, the resources of the subframes on the corresponding subframes in the selection window are eliminated.

2. And if the current UE detects the PSCCH in the monitoring window, measuring the RSRP of the scheduled PSSCH, and if the measured PSSCH-RSRP is higher than a PSSCH-RSRP threshold and a resource conflict exists between the reserved transmission resource determined according to the reservation information in the SCI and the data to be sent by the current UE, excluding the resource from the set A by the current UE. The selection of the PSSCH-RSRP threshold is determined by priority information carried in the detected PSCCH and the priority of data to be transmitted by the current UE.

3. If the number of the remaining resources is less than 20% of the total number of the resources in the selection window after the resources in the steps 1 and 2 are eliminated from the set A, the current UE raises the PSSCH-RSRP threshold by 3dB, and the steps 1-2 are repeated until the number of the remaining resources in the set A is greater than 20% of the total number of the resources in the selection window.

4. Currently, the UE performs S-RSSI (Received Signal Strength Indicator) detection on the remaining resources in the set a, sorts the resources according to energy level, and puts the 20% (relative to the number of resources in the set a) resources with the lowest energy into the set B.

5. The current UE selects a resource with medium probability (random) from the set B for data transmission.

In NR (New Radio, New Radio or New wireless communication technology) V2X, automatic driving needs to be supported, and thus higher requirements are placed on data interaction between vehicles, such as higher throughput, lower latency, higher reliability, larger coverage, and more flexible resource allocation.

In NR V2X, users supporting high priority preempt resources reserved by users of low priority. If the UE1 (low priority) picks up the resource and reserves it in the transmitted SCI, but when the UE1 senses that there is a resource conflict between the resource reserved by the UE2 (high priority) and the resource reserved by the UE1 before using it, the UE1 reselects the resource. Specifically, the UE1 reselects a resource with a resource conflict, and may continue to use the resource without a conflict.

In the embodiment of the present disclosure, the priority of the UE may be the priority of the user terminal itself, for example, the priority of a general vehicle is low, and the priority of an emergency vehicle is high; or the priority of the data to be sent currently by the UE, for example, the priority of the packet notifying that a traffic accident occurs is high, and the priority of sending the common interactive information is low; or according to a combination of the two, etc. The current UE can acquire the priority information of other UEs according to received SCIs sent by other UEs, and can also send the priority information of the current UE to other UEs through the SCIs.

Fig. 4 is a schematic diagram of resource conflict and implementation of chained resource selection or reservation according to the present disclosure.

In the embodiment of the present disclosure, one SCI may indicate K transmission resources at most, where K is a positive integer greater than or equal to 1, for example, K is 3 or 4, and in the following description, one SCI may indicate 4 transmission resources at most, which is not limited to this disclosure. The SCI sent by the terminal can indicate the remaining K-1 transmission resources besides the transmission resources of the sideline data scheduled by the current SCI, which means that the terminal reserves the K-1 transmission resources.

As shown in fig. 4, it is assumed that the transmission resources indicated by the SCI transmitted by the UE1 at the time n + t1 are respectively located at n + t1, n + t2, n + t3, and n + t 4; the transmission resource at the time n + t1 is the transmission resource of the sideline data scheduled by the SCI, and the transmission resources of n + t2, n + t3, and n + t4 represent the transmission resources reserved by the UE 1. The transmission resources of the UE2 are located at n + t1 ', n + t2 ', n + t3 ', and n + t4 ', respectively, wherein the third resource n + t3 of the UE1 overlaps with the third resource n + t3 ' of the UE2 (partially or completely overlaps in the illustration).

One case is that the SCI transmitted by the UE1 at time n + t1 indicates that transmission resources of n + t2, n + t3, and n + t4 are reserved, if the UE1 detects that the UE2 reserves transmission resources of n + t2 ', n + t 3', and n + t4 'before transmitting data at time n + t2, and there is a resource conflict between the transmission resources of n + t 3' of the UE2 and the transmission resources of n + t3 reserved by the UE1, and the priority of the UE2 is higher than that of the UE1, the UE1 performs resource reselection, where only the resources that conflict with the UE2, such as the resources of n + t3, may be reselected, and the resources that do not conflict, such as the resources of n + t2, and n + t4, may not perform resource reselection. Therefore, when the terminal finds that the resource conflict triggers the resource reselection, how to determine the resource selection window is a problem to be solved.

Alternatively, when the SCI sent by the UE1 at the time n + t1 indicates that the transmission resources are respectively located at n + t1, n + t2, n + t3, and n + t4, if there is no conflict with the resources of other users, the UE1 selects resources before sending the SCI at the time n + t2, for example, selects the transmission resources of n + t5, so that the SCI sent at the time n + t2 can continue to indicate 4 transmission resources, and this manner of resource selection is called chain resource selection or reservation. Therefore, when the terminal performs the chained resource selection or reservation, how to determine the resource selection window is also a problem to be solved.

In the related art, only how to determine the size of the resource selection window when the terminal performs resource selection is discussed, but the problem of how to determine the size of the resource selection window when the terminal performs resource reselection due to resource conflict or when the terminal performs chained resource selection or reservation is still unsolved.

In addition, considering that V2X is one of D2D, the problem described above is not limited to V2X, but is a problem that occurs in the entire D2D.

Hereinafter, embodiments of the present disclosure will be described with reference to the drawings. The embodiments described below are merely examples, and the embodiments to which the present disclosure is applied are not limited to the embodiments described below. For example, although the radio communication system according to the present embodiment assumes a system conforming to the LTE scheme, the present disclosure is not limited to LTE, and can be applied to other schemes. In the present specification and claims, "LTE" is used in a broad sense, and includes not only a communication scheme corresponding to release 8 or 9 of 3GPP but also a 5 th-generation communication scheme corresponding to release 10, 11, 12, 13, or release 14 and beyond of 3 GPP.

In addition, although the present embodiment mainly targets V2X, the technique of the present embodiment is not limited to V2X, and can be widely applied to all D2D. Further, the meaning of "D2D" includes V2X.

Further, "D2D" is used broadly, and includes not only a process of transmitting and receiving a D2D signal between user equipments UEs, but also a process of receiving (monitoring) a D2D signal by a base station, and a process of transmitting an uplink signal to a base station eNB by a user equipment UE in a case where RRC (Radio Resource Control) idle (RRC idle) state or in a case where connection with the base station eNB is not established.

The technique of D2D described here can also be used in V2X, and the UE in the embodiments of the present disclosure can transmit and receive D2D signals using this technique.

FIG. 5 is a flow chart of an embodiment of a method of determining a resource selection window according to the present disclosure. The method provided by the embodiment of the present disclosure may be executed by any terminal, and the present disclosure does not limit this.

As illustrated in fig. 5, a method provided by an embodiment of the present disclosure may include the following steps.

In step S510, a first time is determined, where the first time is a time for resource selection.

It is assumed that the first time is denoted as n1, and n1 is a real number greater than or equal to 0, which may be a time for performing resource selection, and the resource selection in the embodiment of the present disclosure may include any one or more of resource reselection, resource selection, and chained resource selection or reservation.

In step S520, the reserved transmission resource at the first time is acquired.

In step S530, a resource selection window at the first time is determined according to the time domain position of the reserved transmission resource at the first time.

According to the method for determining the resource selection window provided by the embodiment of the disclosure, when the terminal selects or reselects the resource, if the reserved transmission resource exists, the position of the resource selection window can be determined according to the time domain position of the reserved transmission resource, on one hand, the resource selection or the resource reselection is performed by adjusting the transmission resource of the terminal, so that the resource load in the system is balanced, the interference influence is reduced, the reliability of the service is improved, the balanced distribution of the service in the system is ensured, and the reliability of the system is improved; on the other hand, the collision rate of the system is reduced, and the transmission reliability is improved.

Fig. 6 is a flowchart of an embodiment of the present disclosure based on step S510 of fig. 5. As shown in fig. 6, in the embodiment of the present disclosure, the step S510 may further include the following steps.

In step S511, a second time n2 is determined, where the second time n2 is before the first time n1, and the second time n2 is a time for resource selection. n2 is a real number greater than or equal to 0 and less than n 1.

In step S512, a third time n3 is determined, where the third time n3 is a time domain position of a first transmission resource of K1 transmission resources selected when the resource selection is performed at the second time n2, and K1 is a positive integer greater than or equal to 1. n3 is a real number greater than n 2.

In step S513, the first time n1 is determined between the second time n2 and the third time n 3.

Taking the above fig. 4 as an example, assuming that K1 is 4, the UE1 selects 4 transmission resources, n + t1, n + t2, n + t3, and n + t4, if the UE1 finds that any one or more resources, such as transmission resources of n + t3, are reserved by other UEs before the time n + t1, and the priorities of other UEs are higher than that of the UE1, the UE1 needs to perform resource reselection between n and n + t1, and when the UE1 performs resource reselection, the reserved transmission resources of n + t1, n + t2, and n + t4 are available transmission resources and do not need to perform reselection, and the resource at the time n + 46t 45 is unavailable and needs to perform reselection.

Fig. 7 is a flowchart of another embodiment of the present disclosure based on step S510 of fig. 5.

As shown in fig. 7, in the embodiment of the present disclosure, the step S510 may further include the following steps.

In step S514, a fourth time n4 is determined, where the fourth time n4 is before the first time n1, and the fourth time n4 is a time for resource selection. n4 is a real number greater than or equal to 0 and less than n 1.

In step S515, a fifth time n5 is determined, where the fifth time n5 is a time domain position of a first transmission resource of K2 transmission resources selected when the resource selection is performed at the fourth time n4, and K2 is a positive integer greater than 1. n5 is a real number greater than n 4.

In step S516, a sixth time n6 is determined, where the sixth time n6 is a time domain position of the other transmission resources except the first transmission resource among the K2 transmission resources selected when the fourth time n4 performs resource selection, for example, n6 is a time domain position of the second transmission resource among the K2 transmission resources. n6 is a real number greater than n 5.

In step S517, the first time n1 is determined between the fifth time n5 and the sixth time n 6.

Also taking the above fig. 4 as an example, assuming that K2 is 4, the UE1 selects 4 transmission resources, n + t1, n + t2, n + t3, and n + t4, if no resource collision is found before the time n + t1, the UE1 needs to select one transmission resource, for example, n + t5, before sending the SCI at the time n + t2, so that the SCI sent at the time n + t2 can also continue to indicate 4 transmission resources, n + t2, n + t3, n + t4, and n + t5, that is, the UE1 needs to perform resource selection between n + t2 and n + t 1.

Fig. 8 is a flowchart of an embodiment of the present disclosure based on step S530 of fig. 5. As shown in fig. 8, in the embodiment of the present disclosure, the step S530 may further include the following steps.

In step S531, according to the time domain position of the reserved transmission resource at the first time, the lowest time domain position and the highest time domain position of the reserved transmission resource at the first time are determined.

It is assumed here that the lowest time domain position of the reserved transmission resources of the terminal at the first instant is n + t_lowThe highest time domain position is n + t_highWhere n denotes the moment at which the terminal performs the resource selection or reselection, it should be understood that t is the moment at which the terminal reserves only one transmission resource at the first moment in time_low＝t _high。

In step S532, a resource selection window at the first time is determined according to the lowest time domain position and the highest time domain position.

FIG. 9 is a schematic diagram of an embodiment of determining a resource selection window based on the method of FIG. 8 according to the present disclosure.

As shown in FIG. 9, the lower bound n + t of the resource selection window_{low_bound1}＝n+t _low(ii) a Upper bound of resource selection window: n + t_{upper_bound1}＝n+t _high。

In the method for determining the resource selection window provided by the embodiment of the disclosure, when the terminal selects or reselects the resource, for example, the terminal selects or reselects the resourceIf there are reserved transmission resources, the location of the resource selection window may be determined according to the time domain location of the reserved transmission resources, e.g., may be at the lowest time domain location n + t_lowAnd highest time domain position n + t_highSelecting resources. As can be seen in FIG. 9, the resource selection window determined using the method of the embodiments of the present disclosure is [ n + T1, n + T2] compared to the resource selection window determined by the related art]Is small, so that, on the one hand, the user terminal is at [ n + t_low,n+t _high]When resource selection is performed in the resource selection window of (1), it is possible to reduce a delay required from when it is determined that the transmission of the D2D signal is to be performed to when the transmission of the D2D signal is actually started; on the other hand, the resource reselection and the chain resource selection or reservation can be realized. Further, by setting [ n + t [ + ]_low,n+t _high]The resource selection window of (2) can effectively shorten the delay particularly when the period for semi-permanently transmitting the D2D signal is long (that is, when the size of the listening window is large). Meanwhile, the resource selection window determined by the method of the embodiment of the disclosure is compared with the resource selection window [ n + T1, n + T2] determined by the related technology]The offset of (2) is large, and the D2D signal can be actually transmitted after the offset time elapses since the D2D signal to be transmitted is generated, so that the processing load of the user terminal UE can be reduced.

Fig. 10 is a flowchart of another embodiment of the present disclosure based on step S530 of fig. 5. As shown in fig. 10, in the embodiment of the present disclosure, the step S530 may further include the following steps.

In step S533, the first interval parameter t is determined_gap1Said first interval parameter t_gap1For indicating the maximum time interval between two adjacent transmission resources indicated by the sidelink control information SCI.

In the embodiment of the present disclosure, the SCI may include an indication field, which may be used to indicate a time interval between any two adjacent transmission resources of the K transmission resources that the SCI can indicate, where a maximum value of the time interval may be denoted as t_gap1。

For example, assume an indication field in the SCIIs 3 bits, the maximum time interval between two adjacent transmission resources that can be indicated by the maximum time interval is 8 time slots (considering that any two transmission resources are not in the same time slot, so the value is not 0, so the value range of 3 bits is 1 to 8), at this time, t is a value of t_gap18. Note that, here, t_gap1Is only related to the number of bits contained in the indication field in the SCI, for example, if the indication field in the SCI is j bits, and j is a positive integer greater than or equal to 1, then t is_gap1＝2 ^j. Regardless of the maximum time interval between any two adjacent transmission resources of the K transmission resources actually indicated by the SCI, taking the example of fig. 4, the SCI transmitted at the time n + t1 indicates that the 4 transmission resources are n + t1, n + t2, n + t3, and n + t4, but t is t_gap1Not equal to max (t2-t1, t3-t2, t4-t3), but the maximum time interval between any two adjacent transmission resources of the plurality of transmission resources indicated by the SCI transmitted at any time does not exceed t_gap1。

In step S534, a resource selection window at the first time is determined according to the time domain position of the reserved transmission resource at the first time and the first interval parameter.

In the embodiment of the present disclosure, the terminal may determine the resource selection window during resource reselection or resource selection according to the time domain position of the reserved transmission resource and the maximum time interval between any two adjacent transmission resources in the multiple transmission resources that may be indicated in the SCI.

Fig. 11 is a flowchart of an embodiment of the present disclosure based on step S534 of fig. 10. As shown in fig. 11, in the embodiment of the present disclosure, the step S534 may further include the following steps.

In step S5341, the lowest time domain position n + t of the reserved transmission resource at the first time is determined according to the time domain position of the reserved transmission resource at the first time_low。

In step S5342, the lowest time domain position n + T is determined according to the first time length parameter T_lowAnd said first interval parameter t_gap1Determining said first moment in timeLower bound n + t of resource selection window_{low_bound2}。

Wherein the first time parameter T' is related to the processing time delay T of the electronic device_proc,1。

In some embodiments, the determination may be made according to the following equation (1):

t _{low_bound2}＝max(T1,t _low-t _gap1) (1)

from the above equation (1), if t is_low-t _gap1Less than T1, then T1 is chosen to determine the lower bound of the selection window, where 0 ≦ T1 ≦ T_proc,1The selection of T1 may be implemented on a terminal basis; if t is_low-t _gap1If T is greater than or equal to T1, T is selected_low-t _gap1The lower bound of the selection window is determined.

In other embodiments, the determination may be made according to the following equation (2):

t _{low_bound2}＝max(T _proc,1,t _low-t _gap1) (2)

from the above equation (2), if t is_low-t _gap1Less than T_proc,1Then select T_proc,1To determine a lower bound for the selection window; if t is_low-t _gap1Greater than or equal to T_proc,1Then select t_low-t _gap1The lower bound of the selection window is determined.

Fig. 12 is a flowchart of another embodiment of the present disclosure based on step S534 of fig. 10. As shown in fig. 12, in the embodiment of the present disclosure, the step S534 may further include the following steps.

In step S5343, determining the highest time domain position n + t of the reserved transmission resource at the first time according to the time domain position of the reserved transmission resource at the first time_high。

In step S5344, the highest temporal position n + T is determined according to a second duration parameter T2_highAnd stationThe first interval parameter t_gap1Determining the upper bound n + t of the resource selection window at the first moment_{upper_bound2}。

Wherein the second duration parameter T2 is related to the delay requirement of the traffic.

In some embodiments, the determination may be made according to the following equation (3):

t _{upper_bound2}＝min(T2,t _high+t _gap1) (3)

wherein, T_th2≤T2≤T _th3，T _th2Is a parameter of network configuration or pre-configuration, T_th2May be based on terminal implementation, e.g. T_th2Is a parameter configured according to the time domain requirement of the service, or a parameter configured according to the priority of the service. T is_th3The parameters are configured by the network, the pre-configured parameters, the parameters configured according to the priority of the service, or the parameters determined according to the delay requirement of the service.

In LTE V2X, the traffic primarily targeted is periodic traffic; in NR V2X, both periodic and aperiodic traffic needs to be supported. In NR V2X, a resource selection window is redefined, the starting time of the resource selection window is n + T1, and the ending time of the resource selection window is (n + min (T2, T)_{rm_PDB}) Wherein, T_{rm_PDB}Represents the remaining latency requirement, and thus, in other embodiments, may be determined according to equation (4) below:

t _{upper_bound2}＝min(T2,T _{rm_PDB}，t _high+t _gap1) (4)

for example, when a terminal has data arriving at time n and needs to select resources, the processing delay of the terminal is 4ms, the delay requirement of the service is 100ms, and the selection window determined by the terminal at time n is [ n +4, n +100] ms; selecting 4 transmission resources in the [ n +4, n +100] ms selection window, assuming that the transmission resources are respectively located at n +10, n +20, n +30, and n +40 time slots, the terminal respectively indicates the 4 transmission resources in the SCI sent by the time slot n +10, after the terminal sends the SCI and corresponding data at n +10, resource selection is required between n +10 and n +20, for example, n +15, an additional transmission resource is selected to realize chain resource selection or reservation, and the time n +15 is recorded as n ', and n' is the time for resource selection.

If the time interval between two adjacent transmission resources indicated in the SCI is 8 slots at maximum, i.e. t_gap1Since there are already 3 reserved transmission resources when selecting resources at time n ', the transmission resources are located in n' +5, n '+ 15, and n' +25 time slots, i.e. t ″_low＝5，t _high25, thus t_low-t _gap1Is-3, and T_proc,14, therefore, the lower bound of the resource selection window determined according to equation (2) above is n' + T_proc,1Therefore, when the terminal selects resources at the time n ', the lower bound of the determined resource selection window is n' + 4.

t _high+t _gap133, and T_{rm_PDB}85, therefore, the upper bound of the resource selection window is determined to be n' + t according to equation (4) above_high+t _gap1That is, when the terminal selects resources at time n ', the upper bound of the determined resource selection window is n' + 32.

Therefore, the resource selection window determined by the terminal at time n 'is [ n' +4, n '+ 32], which already includes 3 transmission resources, i.e., n' +5, n '+ 15, n' +25, the terminal selects another transmission resource within the selection window, and the newly selected transmission resource and the existing 3 transmission resources can be indicated by SCI.

Specific examples are shown in FIGS. 13-16 below, where the upper bound of the resource selection window is only exemplarily considered T2, and T is not considered_{rm_PDB}. According to the related art, when the terminal selects or reselects resources at time n, the starting position of the resource selection window is n + T1, and the ending position is n + T2. However, because the terminal already has reserved transmission resources during resource selection or reselection, two reserved transmission resources are provided in the figure and respectively correspond to the lowest time domain position n + t_lowAnd highest time domain positionn+t _high(ii) a If the SCI can indicate that the maximum time interval between two adjacent transmission resources is t_gap1Then, in the above resource selection window [ n + T1, n + T2]]On the basis of the position of the resource selection window, the position of the resource selection window can be further limited to [ n + t ]_{low_bound2},n+t _{upper_bound2}]. Resources outside the selection window are outside the indicated range of SCIs and are therefore unavailable.

Fig. 13 is a schematic diagram of an embodiment of determining a resource selection window based on the manner of fig. 11 and 12 according to the present disclosure.

As shown in FIG. 13, t is given_low-t _gap1Greater than T1, so the lower bound n + T of the corresponding resource selection window_{low_bound2}＝n+t _low-t _gap1；t _high+t _gap1Less than T2, and therefore the upper bound n + T of the corresponding resource selection window_{upper_bound2}＝n+t _high+t _gap1。

Fig. 14 is a schematic diagram of another embodiment of the present disclosure for determining the resource selection window based on the manner of fig. 11 and 12.

As shown in FIG. 14, t is given_low-t _gap1Less than or equal to T1, the lower bound n + T of the corresponding resource selection window_{low_bound2}＝n+T1；t _high+t _gap1Less than T2, and therefore the upper bound n + T of the corresponding resource selection window_{upper_bound2}＝n+t _high+t _gap1。

Fig. 15 is a schematic diagram of another embodiment of the present disclosure for determining the resource selection window based on the manner of fig. 11 and 12.

As shown in FIG. 15, t is given_low-t _gap1Greater than T1, so the lower bound n + T of the corresponding resource selection window_{low_bound2}＝n+t _low-t _gap1；t _high+t _gap1Greater than or equal to T2, so the upper bound n + T of the corresponding resource selection window_{upper_bound2}＝n+T2。

Fig. 16 is a schematic diagram of another embodiment of the present disclosure for determining the resource selection window based on the manner of fig. 11 and 12.

As shown in FIG. 16, t is given_low-t _gap1Less than or equal to T1, so the lower bound n + T of the corresponding resource selection window_{low_bound2}＝n+T1；t _high+t _gap1Greater than or equal to T2, so the upper bound n + T of the corresponding resource selection window_{upper_bound2}＝n+T2。

Fig. 17 is a flowchart of yet another embodiment of the present disclosure based on step S530 of fig. 5. As shown in fig. 17, in the embodiment of the present disclosure, the step S530 may further include the following steps.

In step S535, a second interval parameter t is determined_gap2Said second interval parameter t_gap2Indicating the maximum time interval between transmission resources indicated by the sidelink control information SCI.

In the embodiment of the present disclosure, a bitmap may be included in the SCI, and each bit in the bitmap may be used to indicate whether a reserved transmission resource exists in a slot corresponding to the bit. For example, if the SCI includes a bitmap with 16 bits, and if the value of the bitmap is 0000010010000010, it indicates whether the corresponding slot in the 16 slots from the time n includes reserved transmission resources, where the 16 bits correspond to n, n +1, …, and n +15 slots, respectively, and since the SCI sent at the time n indicates the transmission resources at the time, another 3 reserved transmission resources need to be indicated by the bitmap in the SCI, in the above example, the slots corresponding to 3 bits with the value of 1 are slots n +5, n +8, and n +14, respectively.

In the embodiment of the present disclosure, the second interval parameter t_gap2Indicating the maximum time interval between transmission resources that the SCI can indicate, it should be noted that t_gap2Is determined by the bit number i of the bitmap, i is a positive integer greater than 1, t_gap2I-1, regardless of the value of each bit of the bitmap, e.g., in the above example, the bitmap includes 16 bits, then t_gap2＝15。

In step S536, a resource selection window at the first time is determined according to the time domain position of the reserved transmission resource at the first time and the second interval parameter.

In the embodiment of the present disclosure, when the terminal performs resource selection or resource reselection, if there is a reserved transmission resource, the terminal may determine the resource selection window according to the time domain position of the reserved transmission resource and the maximum time interval between the transmission resources that can be indicated in the SCI.

At this time, the lower bound and the upper bound of the resource selection window are respectively:

fig. 18 is a flowchart of an embodiment of the present disclosure based on step S536 of fig. 17. As shown in fig. 18, in the embodiment of the present disclosure, the step S536 may further include the following steps.

In step S5361, determining the highest time domain position n + t of the reserved transmission resource at the first time according to the time domain position of the reserved transmission resource at the first time_high。

In step S5362, the highest temporal position n + T is determined according to the first time parameter T_highAnd said second interval parameter t_gap2Determining the lower bound n + t of the resource selection window at the first moment_{low_bound3}。

Wherein the first time parameter T' is related to the processing time delay T of the electronic device_proc,1。

In some embodiments, this may be determined according to the following equation (5):

t _{low_bound3}＝max(T1,t _high-t _gap2) (5)

i.e., if t_high-t _gap2If the value is less than T1, selecting T1 to determine the lower bound of the selection window; if t is_high-t _gap2If T is greater than or equal to T1, T is selected_high-t _gap2The lower bound of the selection window is determined.

In other embodiments, the determination may be made according to equation (6) below:

t _{low_bound3}＝max(T _proc,1,t _high-t _gap2) (6)

i.e., if t_high-t _gap2Less than T_proc,1Then select T_proc,1To determine a lower bound for the selection window; if t is_high-t _gap2Greater than or equal to T_proc,1Then select t_high-t _gap2The lower bound of the selection window is determined.

Fig. 19 is a flowchart of another embodiment of the present disclosure based on step S536 of fig. 17. As shown in fig. 19, in the embodiment of the present disclosure, the step S536 may further include the following steps.

In step S5363, the lowest time domain position t of the reserved transmission resource at the first time is determined according to the time domain position of the reserved transmission resource at the first time_low。

In step S5364, the lowest temporal position T is determined according to the second duration parameter T2_lowAnd said second interval parameter t_gap2Determining an upper bound t of the resource selection window at the first time_{upper_bound3}。

Wherein the second duration parameter T2 is related to the delay requirement of the traffic.

In some embodiments, this may be determined according to the following equation (7):

t _{upper_bound3}＝min(T2,t _low+t _gap2) (7)

i.e., if t_low+t _gap2If less than T2, T is selected_low+t _gap2To determine an upper bound for the selection window; if t is_low+t _gap2Greater than or equal to T2, then T2 is chosen to determine the upper bound of the selection window.

In other embodiments, the determination may be made according to equation (8) below:

t _{upper_bound3}＝min(T2,T _{rm_PDB}，t _low+t _gap2) (8)

for example, when data arrives at a time n, a terminal needs to select resources, the processing delay of the terminal is 4ms, the delay requirement of the service is 100ms, and the selection window determined by the terminal at the time n is [ n +4, n +100 ]; selecting 4 transmission resources in the selection window, assuming that the transmission resources are respectively located in n +6, n +12, n +14, and n +15 slots, the terminal respectively indicates the 4 transmission resources in the SCI sent in slot n +6, and with respect to time n +6, the bit map in the SCI is: 0000001011000000. after the terminal sends SCI and corresponding data at the time n +6, resource selection is required between the time n +6 and the time n +12, for example, at the time n +8, an additional transmission resource is selected to realize chain resource selection or reservation, and the time n +8 is marked as n', that is, the time for resource selection.

If the time interval of the transmission resources indicated in the SCI is 15 slots at the maximum, for example, a number of reserved transmission resources, i.e., t, are indicated by a 16-bit bitmap_gap215; since there are already 3 reserved transmission resources when selecting resources at n ', the transmission resources are respectively located at n' +4, n '+ 6, n' +7 time slots, i.e. t_low＝4，t _high7, thus t_high-t _gap2Is-8, and T_proc,14, the lower bound of the resource selection window determined according to equation (6) above is therefore n' + T_proc,1Therefore, when the terminal selects resources at the time n ', the lower bound of the determined resource selection window is n' + 4.

t _low+t _gap219, and T_{rm_PDB}85, the upper bound of the resource selection window determined according to equation (8) above is therefore n' + t_low+t _gap2Therefore, when the terminal selects the resource at the time n ', the upper bound of the determined resource selection window is n' + 19.

Therefore, the resource selection window determined by the terminal at time n 'is [ n' +4, n '+ 19], which already includes 3 transmission resources, i.e., n' +4, n '+ 6, n' +7, the terminal selects another transmission resource within the selection window, and the newly selected transmission resource and the existing 3 transmission resources can be indicated by SCI.

As will be illustrated below in connection with FIGS. 20-23, again without regard to T_{rm_PDB}. As shown in the figure, the terminal performs resource selection or resource reselection at time n, where the starting position of the resource selection window is n + T1, and the ending position is n + T2. However, because the terminal already has reserved transmission resources during resource selection or reselection, two reserved transmission resources are shown in the figure, and the corresponding time domain positions are n + t_lowAnd n + t_high. If the maximum time interval between transmission resources that the SCI can indicate is t_gap2Then, in the above resource selection window [ n + T1, n + T2]]On the basis of the position of the resource selection window, the position of the resource selection window can be further limited to [ n + t ]_{low_bound3},n+t _{upper_bound3}]Resources outside the selection window are outside the indicated range of SCIs and are therefore unavailable.

Fig. 20 is a schematic diagram of an embodiment of determining a resource selection window based on the manner of fig. 18 and 19 according to the present disclosure.

As shown in FIG. 20, t_high-t _gap2Given a greater than T1, the corresponding lower bound n + T of the resource selection window_{low_bound3}＝n+t _high-t _gap2；t _low+t _gap2Less than T2, and therefore the upper bound n + T of the corresponding resource selection window_{upper_bound3}＝n+t _low+t _gap2。

Fig. 21 is a schematic diagram of another embodiment of the present disclosure for determining a resource selection window based on the manner of fig. 18 and 19.

As shown in FIG. 21, t_high-t _gap2Given a case less than or equal to T1, the corresponding lower bound n + T of the resource selection window is therefore given_{low_bound3}＝n+T1；t _low+t _gap2Less than T2, and therefore the upper bound n + T of the corresponding resource selection window_{upper_bound3}＝n+t _low+t _gap2。

Fig. 22 is a schematic diagram of another embodiment of the present disclosure for determining the resource selection window based on the manner of fig. 18 and 19.

As shown in FIG. 22, t_high-t _gap2Given a case less than or equal to T1, the corresponding lower bound n + T of the resource selection window is therefore given_{low_bound3}＝n+T1；t _low+t _gap2Greater than or equal to T2, so the upper bound n + T of the corresponding resource selection window_{upper_bound3}＝n+T2。

Fig. 23 is a schematic diagram of another embodiment of the present disclosure for determining the resource selection window based on the manner of fig. 18 and 19.

As shown in FIG. 23, t_high-t _gap2Given a greater than T1, the corresponding lower bound n + T of the resource selection window_{low_bound3}＝n+t _high-t _gap2；t _low+t _gap2Greater than or equal to T2, so the upper bound n + T of the corresponding resource selection window_{upper_bound3}＝n+T2。

In the method for determining the resource selection window provided by the embodiment of the present disclosure, when the terminal performs resource selection or resource reselection, if there is a reserved transmission resource, the location of the resource selection window may be determined according to a time interval between a time domain location of the reserved transmission resource and the transmission resource indicated by the SCI. As can be seen from the foregoing embodiments, the resource selection window determined by the method according to the embodiments of the present disclosure is less than or equal to the resource selection window [ n + T1, n + T2] determined by the related art, so on the one hand, when the user terminal selects a resource in the resource selection window, the delay required from when it is determined that the D2D signal is to be transmitted to when the D2D signal is actually started can be shortened; on the other hand, the resource reselection and the chain resource selection or reservation can be realized. Furthermore, by providing the resource selection window, the delay can be more effectively reduced particularly when the period for semi-permanently transmitting the D2D signal is long (that is, when the size of the listening window is large). Meanwhile, the offset of the resource selection window determined by the method according to the embodiment of the present disclosure is greater than or equal to the offset of the resource selection window [ n + T1, n + T2] determined by the related art, and the D2D signal can be actually transmitted after the offset time elapses since the D2D signal that should be transmitted is generated, and therefore, the processing load of the user terminal UE can be reduced.

In an exemplary embodiment, the method may further include: and when the resource selection is carried out in the resource selection window at the first moment, the transmission resource on the time slot where the reserved transmission resource at the first moment is located is excluded.

For example, the resource selection window determined by the terminal at time n ' is assumed to be [ n ' +4, n ' +19], where 3 transmission resources, i.e., n ' +4, n ' +6, n ' +7, are already included in the selection window, and when the terminal reselects a transmission resource in the selection window, all transmission resources in n ' +4, n ' +6, n ' +7 slots need to be excluded. For example, if the n '+ 4 slot includes 100 PRBs, 10 of which are reserved, then when selecting the resource at the time n', all of the 100 PRBs need to be excluded.

Generally, a terminal can only send one side data channel at the same time, that is, the terminal can only send one psch on one timeslot and cannot send more than one psch, so that if there is a reserved transmission resource when the terminal selects a resource, according to the above embodiment, the resource selection window includes the reserved transmission resource, so that the terminal cannot select a transmission resource on the time domain resource where the reserved transmission resource is located when the terminal selects a resource, that is, the terminal needs to exclude the transmission resource on the time domain resource where the reserved transmission resource is located in the resource selection window in the resource selection process.

The method for determining the resource selection window provided by the embodiment of the present disclosure provides that when the terminal selects the resource, the location of the resource selection window is determined according to the time domain location of the reserved transmission resource and the time interval indicated by the SCI, so that the transmission resource selected by the terminal in the selection window can be indicated by the SCI. And the terminal excludes the transmission resource on the reserved transmission resource when selecting the resource, thereby avoiding the occurrence of resource conflict.

In the embodiment of the present disclosure, the user equipment UE may use the resource selection using the listening only when the resource is reselected, and randomly select the resource within the selection window without listening in the resource selection at the time of initial transmission. Since it is not necessary to perform listening in the background all the time, battery consumption of the user terminal UE can be reduced. The pool of transmission resources utilized in random resource selection and in listen-based resource selection may be different. For example, a resource selection method that can be applied for each resource pool can be set (in advance) in the user terminal UE by a higher layer.

As a result of the user terminal UE listening, when it is detected that the interference level (or RSSI) is equal to or greater than a predetermined threshold, it is possible to fall back from the resource selection by the listening to the random resource selection. The resource selection candidates increase, and the randomization effect of interference can be expected. The user terminal UE may switch whether to perform such an action based on the number of resources/number of subframes listened to, the number of candidates for selecting resources and/or the terminal capability, etc. The threshold value of the interference level can be set (in advance) in the user terminal UE by higher layers.

The user terminal UE may also change the size of the selection window that may be obtained in case of a resource selection based on sensing and in case of a random resource selection. For example, when random resource selection is performed, the randomization effect may be increased by specifying a larger selection window size. The size of the selection window may be set according to the priority of each packet and the resource pool.

The user terminal UE may mitigate the listening process according to the terminal capabilities or resource pool settings. For example, the listening may be configured by a step of decoding or measuring based on the control information and a step of power detection (RSSI measurement or the like), but the user terminal UE may perform only the step of power detection. In this case, the user terminal UE does not need to perform blind detection of control information, and can reduce terminal cost and power consumption.

In case of semi-permanently transmitting the D2D signal, the user terminal UE allows listening before initially starting the transmission of the D2D signal, in a later period the D2D signal is transmitted over the selected resource. Further, since the user terminal UE transmits the D2D signal through the periodic resource subsequent to the selected resource, the user terminal UE does not listen (skip) in the resource transmitting the D2D signal for the second time and thereafter. When acting in this way, the same user terminal UE can continue to use the same resources continuously. Therefore, the user terminal UE may be considered to occupy resources that are not (skip) monitored as resources for transmitting the D2D signal, etc., and resources in the following period, and may be collectively excluded from the resource selection candidates.

FIG. 24 is a block diagram of an embodiment of the present disclosure.

As shown in fig. 24, the apparatus 2400 for determining a resource selection window provided by the embodiment of the present disclosure may include a first time determination module 2410, a reserved resource obtaining module 2420, and a selection window determination module 2430.

The first time determination module 2410 may be configured to determine a first time, which is a time when resource selection is performed. The reserved resource obtaining module 2420 may be configured to obtain the reserved transmission resources at the first time instant. The selection window determining module 2430 may be configured to determine the resource selection window for the first time instant according to the time domain position of the reserved transmission resources for the first time instant.

In an exemplary embodiment, the selection window determination module 2430 may include: a high-low time domain position determining unit, configured to determine a lowest time domain position and a highest time domain position of the reserved transmission resource at the first time according to the time domain position of the reserved transmission resource at the first time; the first selection window determining unit may be configured to determine the resource selection window at the first time according to the lowest time domain position and the highest time domain position.

In an exemplary embodiment, the selection window determination module 2430 may include: a first interval parameter determining unit, which may be configured to determine a first interval parameter, where the first interval parameter is used to represent a maximum time interval between two adjacent transmission resources indicated by the sidelink control information; the second selection window determining unit may be configured to determine the resource selection window at the first time according to the time domain position of the reserved transmission resource at the first time and the first interval parameter.

In an exemplary embodiment, the second selection window determining unit may include: a first minimum time domain position determining subunit, configured to determine, according to the time domain position of the reserved transmission resource at the first time, a minimum time domain position of the reserved transmission resource at the first time; a first selection window lower bound determination subunit may be configured to determine a lower bound of the resource selection window at the first time instant according to a first time length parameter, the lowest time domain position, and the first interval parameter. Wherein the first time parameter is related to a processing delay of the electronic device.

In an exemplary embodiment, the second selection window determining unit may include: a first highest time domain position determining subunit, configured to determine, according to the time domain position of the reserved transmission resource at the first time, the highest time domain position of the reserved transmission resource at the first time; the first selection window upper bound determining subunit may be configured to determine an upper bound of the resource selection window at the first time according to a second duration parameter, the highest time domain position, and the first interval parameter. Wherein the second duration parameter is related to a delay requirement of a service.

In an exemplary embodiment, the selection window determination module 2430 may include: a second interval parameter determining unit, which may be configured to determine a second interval parameter, where the second interval parameter represents a maximum time interval between transmission resources indicated by the sidelink control information; the third selection window determining unit may be configured to determine the resource selection window at the first time according to the time domain position of the reserved transmission resource at the first time and the second interval parameter.

In an exemplary embodiment, the third selection window determining unit may include: a second highest time domain position determining subunit, configured to determine, according to the time domain position of the reserved transmission resource at the first time, the highest time domain position of the reserved transmission resource at the first time; the second selection window lower bound determining subunit may be configured to determine, according to the first time length parameter, the highest time domain position, and the second interval parameter, a lower bound of the resource selection window at the first time. Wherein the first time parameter is related to a processing delay of the electronic device.

In an exemplary embodiment, the third selection window determining unit may include: a second lowest time domain position determining subunit, configured to determine, according to the time domain position of the reserved transmission resource at the first time, the lowest time domain position of the reserved transmission resource at the first time; the second selection window upper bound determining subunit may be configured to determine an upper bound of the resource selection window at the first time according to a second duration parameter, the lowest time domain position, and the second interval parameter. Wherein the second duration parameter is related to a delay requirement of a service.

In an exemplary embodiment, the first time determination module 2410 may include: a second time determining unit, configured to determine a second time, where the second time is before the first time, and the second time is a time for performing resource selection; a third time determining unit, configured to determine a third time, where the third time is a time domain position of a first transmission resource of the K1 transmission resources selected when the resource selection is performed at the second time, and K1 is a positive integer greater than or equal to 1; a first time determination unit may be configured to determine the first time between the second time and the third time.

In an exemplary embodiment, the first time determination module 2410 may include: a fourth time determination unit, configured to determine a fourth time, where the fourth time is before the first time, and the fourth time is a time for performing resource selection; a fifth time determining unit, which may be configured to determine a fifth time, where the fifth time is a time domain position of a first transmission resource of the K2 transmission resources selected when the resource selection is performed at the fourth time, and K2 is a positive integer greater than 1; a sixth time determining unit, configured to determine a sixth time, where the sixth time is a time domain position of another transmission resource, except the first transmission resource, of the K2 transmission resources selected when the resource selection is performed at the fourth time; a first time obtaining unit may be configured to determine the first time between the fifth time and the sixth time.

In an exemplary embodiment, the apparatus 2400 for determining a resource selection window may further include: the resource excluding module may be configured to exclude the transmission resource on the time slot where the reserved transmission resource at the first time is located, when selecting the resource in the resource selection window at the first time.

The electronic device in the embodiments of the present disclosure may be the user terminal UE in the above-described embodiments, which has at least a function for performing an action in accordance with LTE, and which may perform a part of the processing of the user terminal UE described hereinbefore.

The user terminal UE includes a signal transmission module having a function of generating various signals of a physical layer from a higher layer signal transmitted from the user terminal UE and performing radio transmission. Further, the signal transmission module has a D2D signal transmission function and a cellular communication transmission function. Further, the signal transmission module has a function of transmitting the D2D signal using the selected resource.

Further, the signal transmission module may transmit reservation information indicating that transmission of a signal is scheduled by the selected "resource for reserving transmission of a D2D signal" using a resource for transmitting a D2D signal.

The user terminal UE also includes a signal receiving module including a function of wirelessly receiving various signals from other user terminals UE or the base station eNB, and acquiring a signal of a higher layer from the received signal of the physical layer. In addition, the signal receiving module has a D2D signal receiving function and a cellular communication receiving function.

The user terminal UE has a function of detecting one or more resources capable of transmitting the D2D signal in a selection window subsequent to the listening window by listening in the listening window. The user terminal UE has a function of selecting a resource for transmitting the D2D signal from the detected one or more resources. When a plurality of resources are detected, the user terminal UE may determine whether to randomly select a resource for transmitting the D2D signal from the plurality of resources or to select a resource for transmitting the D2D signal according to a predetermined condition, autonomously or according to an instruction from the base station eNB. The user terminal UE may select a resource for reserving transmission of the D2D signal from one or more resources for reserving transmission of the detected D2D signal.

The specific implementation of the modules, units and sub-units of the apparatus for determining a resource selection window provided in the embodiments of the present disclosure may refer to the content of the method for determining a resource selection window provided in the foregoing embodiments, and are not described herein again.

Fig. 25 is a schematic structural diagram of an embodiment of an electronic device according to the present disclosure. As shown in fig. 25, an electronic device 2500 provided by the embodiments of the present disclosure may include a storage unit 2510 and a processing unit 2520.

The storage unit 2510 may be used to store a program for determining the resource selection window. The processing unit 2520 may be configured to execute a program for determining a resource selection window, which when executed, executes a method for determining a resource selection window as described in any of the embodiments above.

In the embodiment of the present disclosure, an electronic device includes an RF (Radio Frequency) module that performs processing related to a Radio signal, a BB (baseband) processing module that performs baseband signal processing, and a UE control module that performs processing of a higher layer and the like.

The RF module generates a radio signal to be transmitted from an antenna by performing D/a (Digital-to-Analog) conversion, modulation, frequency conversion, power amplification, and the like on a Digital baseband signal received from the BB processing module. Further, the received radio signal is subjected to frequency conversion, Analog to Digital (a/D) conversion, demodulation, and the like to generate a Digital baseband signal, which is transmitted to the BB processing module. The RF module includes, for example, a part of a signal transmitting module and a part of a signal receiving module.

The BB processing module performs processing for converting an IP (Internet Protocol Address) packet and a digital baseband signal into each other. A DSP (Digital Signal Processor) is a Processor that performs Signal processing in the BB processing module. The memory is used as a working area for the DSP. The BB processing module includes, for example, a part of a signal transmitting module and a part of a signal receiving module.

The UE control module performs protocol processing in the IP layer, processing of various applications, and the like. The processor is a processor that performs processing performed by the UE control module. The memory is used as a work area for the processor.

The disclosed embodiments also provide a base station, wherein the base station eNB has a signal transmission module, a signal reception module, and a notification module, and at least has a function for performing an action in accordance with LTE. The names of the function division and the function unit may be arbitrary as long as the operation of the present embodiment can be performed.

The signal transmission module includes a function of generating various signals of a physical layer from a higher layer signal transmitted from the user terminal UE and performing radio transmission. The signal reception module includes a function of receiving various signals wirelessly from the user terminal UE and acquiring a higher layer signal from the received physical layer signal.

The notification module notifies the user terminal UE of various information used by the user terminal UE to perform the operation of the present embodiment, using broadcast information or RRC signaling. The various information includes, for example, information indicating the setting of the resource pool, information indicating the start position and the end position of each window (listening window, selection window, and reservation window), and the like.

The functional configurations of the user terminal UE and the base station eNB described above may be implemented entirely by hardware circuits (for example, one or more chips), or may be implemented partly by hardware circuits and partly by a CPU and a program.

In an exemplary embodiment of the present disclosure, there is also provided a readable storage medium having stored thereon a program product capable of implementing the above-described method of the present specification. In some possible embodiments, various aspects of the disclosure may also be implemented in the form of a program product comprising program code for causing a terminal device to perform the steps according to various exemplary embodiments of the disclosure described in the above-mentioned example section of this specification, when the program product is run on the terminal device.

As described above, the configuration of each device (user terminal UE/base station eNB) described in the present embodiment may be a configuration realized by the CPU (processor) executing a program in the device having the CPU and the memory, a configuration realized by hardware such as a hardware circuit having the processing logic described in the present embodiment, or a configuration in which a program and hardware are mixed.

While the embodiments of the present disclosure have been described above, the disclosed invention is not limited to such embodiments, and various modifications, alternatives, and substitutions will be apparent to those skilled in the art. Although specific numerical examples are used to facilitate understanding of the present invention, these numerical values are merely examples and any appropriate values may be used unless otherwise specified. The items described in the above description are not essential to the present disclosure, and items described in 2 or more items may be used in combination as necessary, or items described in one item may be applied to items described in other items (as long as there is no contradiction). Boundaries of the functional units or the processing units in the functional block diagrams do not necessarily correspond to boundaries of the physical components. The operations of the plurality of functional units may be performed by 1 physical component, or the operations of 1 functional unit may be performed by a plurality of physical components. The sequence and flow described in the embodiments can be changed without contradiction. For ease of description of the processing, the user terminal UE/base station eNB is described using functional block diagrams, and such means may also be implemented in hardware, software, or a combination thereof. Software that is operated by a processor included in the user terminal UE according to the embodiment of the present disclosure and software that is operated by a processor included in the base station eNB according to the embodiment of the present disclosure may be stored in a random access memory, a flash memory, a read only memory, a register, a hard disk, a removable disk, a database, a server, or any other suitable storage medium.

Further, terms described in the present specification and/or terms necessary for understanding the present specification may be replaced with terms having the same or similar meanings. For example, the channel and/or symbol may be a signal (signal). Further, the signal may be a message.

For a UE, those skilled in the art sometimes also refer to the following terms: a subscriber station, a mobile unit, a subscriber unit, a wireless unit, a remote unit, a mobile device, a wireless communication device, a remote device, a mobile subscriber station, an access terminal, a mobile terminal, a wireless terminal, a remote terminal, a handset, a user agent (user agent), a mobile client, a client, or some other suitable terminology.

The respective aspects and embodiments described in the present specification may be used alone, may be used in combination, or may be switched to use with execution.

As used in this specification, the term "according to" does not mean "only according to" unless otherwise specified. In other words, the expression "according to" means both "according to only" and "according to at least".

Note that, the order of the processing procedures, the timings, and the like of the respective forms and embodiments described in this specification may be changed without departing from the scope of the invention. For example, elements of various steps are presented in the order of example for the method described in the present specification, but not limited to the specific order presented.

The input/output information and the like may be stored in a specific location (for example, a memory) or may be managed by a management table. The input/output information and the like can be rewritten, updated, or written. The output information may be deleted. The entered information may also be transmitted to other devices, etc.

Information, signals, and the like described in this specification can be represented using any of a variety of different technologies. For example, data, commands, instructions (commands), information, signals, bits, symbols (symbols), chips (chips), etc., that may be referenced throughout the above description may be represented by voltages, currents, electromagnetic waves, magnetic fields or particles, optical fields or photons, or any combination thereof.

The present disclosure is not limited to the above-described embodiments, and various modifications, alternatives, and substitutions are included in the present disclosure without departing from the spirit of the present disclosure.

While the present disclosure has been described with reference to several exemplary embodiments, it is understood that the terminology used is intended to be in the nature of words of description and illustration, rather than of limitation. As the present disclosure may be embodied in several forms without departing from the spirit or essential characteristics thereof, it should also be understood that the above-described embodiments are not limited by any of the details of the foregoing description, but rather should be construed broadly within its spirit and scope as defined in the appended claims, and therefore all changes and modifications that fall within the meets and bounds of the claims, or equivalences of such meets and bounds are therefore intended to be embraced by the appended claims.

Claims (24)

1. A method for determining a resource selection window, comprising:

   determining a first moment, wherein the first moment is the moment of selecting resources;

   acquiring reserved transmission resources at the first moment;

   and determining a resource selection window at the first moment according to the time domain position of the reserved transmission resource at the first moment.
2. The method of claim 1, wherein the determining the resource selection window at the first time according to the time domain position of the reserved transmission resource at the first time comprises:

   determining the lowest time domain position and the highest time domain position of the reserved transmission resource at the first moment according to the time domain position of the reserved transmission resource at the first moment;

   and determining a resource selection window at the first moment according to the lowest time domain position and the highest time domain position.
3. The method of claim 1, wherein the determining the resource selection window at the first time according to the time domain position of the reserved transmission resource at the first time comprises:

   determining a first interval parameter, wherein the first interval parameter is used for representing a maximum time interval between two adjacent transmission resources indicated by the sidelink control information;

   and determining a resource selection window at the first moment according to the time domain position of the reserved transmission resource at the first moment and the first interval parameter.
4. The method of claim 3, wherein the determining the resource selection window at the first time according to the time domain position of the reserved transmission resource at the first time and the first interval parameter comprises:

   determining the lowest time domain position of the reserved transmission resource at the first moment according to the time domain position of the reserved transmission resource at the first moment;

   determining a lower bound of a resource selection window at the first moment according to a first time length parameter, the lowest time domain position and the first interval parameter;

   wherein the first time parameter is related to a processing delay of the electronic device.
5. The method of claim 3, wherein the determining the resource selection window for the first time according to the time domain position of the reserved transmission resource for the first time and the first interval parameter comprises:

   determining the highest time domain position of the reserved transmission resource at the first moment according to the time domain position of the reserved transmission resource at the first moment;

   determining an upper bound of a resource selection window at the first moment according to a second duration parameter, the highest time domain position and the first interval parameter;

   wherein the second duration parameter is related to a delay requirement of a service.
6. The method of claim 1, wherein determining the resource selection window at the first time according to the time domain position of the reserved transmission resources at the first time comprises:

   determining a second interval parameter, wherein the second interval parameter represents the maximum time interval between transmission resources indicated by the sidelink control information;

   and determining a resource selection window at the first moment according to the time domain position of the reserved transmission resource at the first moment and the second interval parameter.
7. The method of claim 6, wherein the determining the resource selection window at the first time according to the time domain position of the reserved transmission resources at the first time and the second interval parameter comprises:

   determining the highest time domain position of the reserved transmission resource at the first moment according to the time domain position of the reserved transmission resource at the first moment;

   determining a lower bound of a resource selection window at the first moment according to a first time length parameter, the highest time domain position and the second interval parameter;

   wherein the first time parameter is related to a processing delay of the electronic device.
8. The method of claim 6, wherein the determining the resource selection window at the first time according to the time domain position of the reserved transmission resources at the first time and the second interval parameter comprises:

   determining the lowest time domain position of the reserved transmission resource at the first moment according to the time domain position of the reserved transmission resource at the first moment;

   determining an upper bound of a resource selection window at the first moment according to a second duration parameter, the lowest time domain position and the second interval parameter;

   wherein the second duration parameter is related to a delay requirement of a service.
9. The method of claim 1, wherein determining the first time comprises:

   determining a second moment, wherein the second moment is before the first moment and is the moment for selecting resources;

   determining a third time, wherein the third time is the time domain position of a first transmission resource in K1 transmission resources selected when the resource selection is performed at the second time, and K1 is a positive integer greater than or equal to 1;

   determining the first time between the second time and the third time.
10. The method of claim 1, wherein determining the first time comprises:

    determining a fourth time, wherein the fourth time is before the first time, and the fourth time is a time for selecting resources;

    determining a fifth time, wherein the fifth time is a time domain position of a first transmission resource in K2 transmission resources selected when the resource selection is performed at the fourth time, and K2 is a positive integer greater than 1;

    determining a sixth time, where the sixth time is a time domain position of another transmission resource except the first transmission resource in the K2 transmission resources selected when the resource selection is performed at the fourth time;

    determining the first time between the fifth time and the sixth time.
11. The method of determining a resource selection window according to any of claims 1 to 10, further comprising:

    and when the resource selection is carried out in the resource selection window at the first moment, the transmission resource on the time slot where the reserved transmission resource at the first moment is located is excluded.
12. An apparatus for determining a resource selection window, comprising:

    the device comprises a first time determining module, a resource selecting module and a resource selecting module, wherein the first time determining module is configured to determine a first time which is the time for selecting resources;

    a reserved resource acquisition module configured to acquire reserved transmission resources at the first time;

    and the selection window determining module is configured to determine the resource selection window at the first moment according to the time domain position of the reserved transmission resource at the first moment.
13. The apparatus for determining a resource selection window of claim 12, wherein the selection window determining module comprises:

    a high-low time domain position determining unit configured to determine a lowest time domain position and a highest time domain position of the reserved transmission resources at the first time according to the time domain position of the reserved transmission resources at the first time;

    a first selection window determining unit configured to determine a resource selection window at the first time according to the lowest time domain position and the highest time domain position.
14. The apparatus for determining a resource selection window of claim 12, wherein the selection window determining module comprises:

    a first interval parameter determining unit configured to determine a first interval parameter, where the first interval parameter is used to indicate a maximum time interval between two adjacent transmission resources indicated by the sidelink control information;

    and a second selection window determining unit configured to determine the resource selection window at the first time according to the time domain position of the reserved transmission resource at the first time and the first interval parameter.
15. The apparatus for determining the resource selection window according to claim 14, wherein the second selection window determining unit comprises:

    a first lowest time domain position determining subunit, configured to determine, according to the time domain position of the reserved transmission resource at the first time, the lowest time domain position of the reserved transmission resource at the first time;

    and the first selection window lower bound determining subunit is configured to determine the lower bound of the resource selection window at the first time according to a first time length parameter, the lowest time domain position and the first interval parameter. Wherein the first time parameter is related to a processing delay of the electronic device.
16. The apparatus for determining the resource selection window according to claim 14, wherein the second selection window determining unit comprises:

    a first highest time domain position determining subunit, configured to determine, according to the time domain position of the reserved transmission resource at the first time, the highest time domain position of the reserved transmission resource at the first time;

    a first selection window upper bound determining subunit, configured to determine an upper bound of the resource selection window at the first time according to a second duration parameter, the highest time domain position, and the first interval parameter;

    wherein the second duration parameter is related to a delay requirement of a service.
17. The apparatus for determining a resource selection window of claim 12, wherein the selection window determining module comprises:

    a second interval parameter determining unit configured to determine a second interval parameter, where the second interval parameter indicates a maximum time interval between transmission resources indicated by the sidelink control information;

    and a third selection window determining unit configured to determine the resource selection window at the first time according to the time domain position of the reserved transmission resource at the first time and the second interval parameter.
18. The apparatus for determining the resource selection window according to claim 17, wherein the third selection window determining unit comprises:

    a second highest time domain position determining subunit, configured to determine, according to the time domain position of the reserved transmission resource at the first time, the highest time domain position of the reserved transmission resource at the first time;

    a second selection window lower bound determining subunit, configured to determine, according to a first time length parameter, the highest time domain position, and the second interval parameter, a lower bound of the resource selection window at the first time;

    wherein the first time parameter is related to a processing delay of the electronic device.
19. The apparatus for determining the resource selection window according to claim 17, wherein the third selection window determining unit comprises:

    a second lowest time domain position determining subunit, configured to determine, according to the time domain position of the reserved transmission resource at the first time, the lowest time domain position of the reserved transmission resource at the first time;

    a second selection window upper bound determining subunit, configured to determine an upper bound of the resource selection window at the first time according to a second duration parameter, the lowest time domain position, and the second interval parameter;

    wherein the second duration parameter is related to a delay requirement of a service.
20. The apparatus for determining the resource selection window of claim 12, wherein the first time determination module comprises:

    a second time determining unit configured to determine a second time, where the second time is before the first time, and the second time is a time for selecting a resource;

    a third time determining unit, configured to determine a third time, where the third time is a time domain position of a first transmission resource of K1 transmission resources selected when the resource selection is performed at the second time, and K1 is a positive integer greater than or equal to 1;

    a first time determination unit configured to determine the first time between the second time and the third time.
21. The apparatus for determining the resource selection window of claim 12, wherein the first time determination module comprises:

    a fourth time determination unit configured to determine a fourth time, where the fourth time is before the first time, and the fourth time is a time for performing resource selection;

    a fifth time determining unit, configured to determine a fifth time, where the fifth time is a time domain position of a first transmission resource of the K2 transmission resources selected when the resource selection is performed at the fourth time, and K2 is a positive integer greater than 1;

    a sixth time determining unit, configured to determine a sixth time, where the sixth time is a time domain position of another transmission resource, except the first transmission resource, of the K2 transmission resources selected when the resource selection is performed at the fourth time;

    a first time obtaining unit configured to determine the first time between the fifth time and the sixth time.
22. The apparatus for determining a resource selection window according to any of claims 12 to 21, further comprising:

    and the resource eliminating module is configured to eliminate the transmission resource on the time slot where the reserved transmission resource at the first moment is located when the resource selection is performed in the resource selection window at the first moment.
23. An electronic device, comprising a storage unit, a processing unit;

    the storage unit is used for storing a program for determining the resource selection window;

    the processing unit is configured to execute a program for determining a resource selection window, and when the program for determining a resource selection window is executed, the processing unit executes the method for determining a resource selection window according to any one of claims 1 to 11.
24. A readable storage medium, comprising:

    a memory storing a program that determines a resource selection window;

    a processor running a program for determining a resource selection window, the program for determining a resource selection window when executed running the method for determining a resource selection window according to any one of claims 1 to 11.

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