Method and apparatus for determining a resource selection window, electronic device, and readable storage medium

Abstract

The present disclosure provides a method and apparatus for determining a resource selection window, an electronic device, and a readable storage medium. The method for determining the resource selection window includes: determining a first time, where the first time is the time for resource selection; obtaining reserved transmission resources at the first time; and determining a resource selection window at the first time according to the time domain position of the reserved transmission resources at the first time. The present disclosure implements a method for determining a resource selection window during resource selection according to the time domain position of reserved transmission resources.

Description

Technical Field

[0001] The present disclosure relates to the field of communication technologies, and particularly to a method and apparatus for determining a resource selection window, an electronic device, and a readable storage medium. Background Art

[0002] When a user equipment (UE) sends a signal, it needs to select resources for the signal transmission. However, if the resources selected by the user equipment conflict with those selected by other user equipments, the user equipment may need to re-select resources. In related technologies, no good solutions have been provided for this. Summary of the Invention

[0003] An object of the present disclosure is to be able to determine a resource selection window when selecting resources according to reserved transmission resources at the time of resource selection.

[0004] According to one aspect of the present disclosure, a method for determining a resource selection window is provided, including: determining a first moment, where the first moment is the moment for resource selection; obtaining the reserved transmission resources at the first moment; and determining the resource selection window at the first moment according to the time domain position of the reserved transmission resources at the first moment.

[0005] According to another aspect of the present disclosure, an apparatus for determining a resource selection window is provided, including: a first moment determination module configured to determine a first moment, where the first moment is the moment for resource selection; a reserved resource obtaining module configured to obtain the reserved transmission resources at the first moment; and a selection window determination module configured to determine the resource selection window at the first moment according to the time domain position of the reserved transmission resources at the first moment.

[0006] According to another aspect of the present disclosure, an electronic device is provided, including a storage unit and a processing unit; the storage unit is used to store a program for determining a resource selection window; the processing unit is used to run the program for determining a resource selection window, and when the program for determining a resource selection window is executed, the method for determining a resource selection window as described in the above embodiment is run.

[0007] According to another aspect of the present disclosure, a readable storage medium is provided, including: a memory storing a program for determining a resource selection window; a processor running the program for determining a resource selection window, and when the program for determining a resource selection window is executed, the method for determining a resource selection window as described in the above embodiment is run.

[0008] In the solution of this embodiment, the first moment for resource selection is determined, and the reserved transmission resources at the first moment are obtained. Therefore, this embodiment can determine the resource selection window at the first moment according to the time domain position of the reserved transmission resources at the first moment. Brief Description of the Drawings

[0009] Figure 1 It is a schematic diagram of an embodiment of transmission mode A of the present disclosure;

[0010] Figure 2 It is a schematic diagram of an embodiment of transmission mode B of the present disclosure;

[0011] Figure 3 It is a schematic diagram of the listening-based resource selection method of the present disclosure;

[0012] Figure 4 It is a schematic diagram of resource conflict occurrence and chain resource selection or reservation implementation of the present disclosure;

[0013] Figure 5 It is a flowchart of an embodiment of the method for determining a resource selection window of the present disclosure;

[0014] Figure 6 It is based on the present disclosure Figure 5 A flowchart of an embodiment of step S510;

[0015] Figure 7 It is based on the present disclosure Figure 5 A flowchart of another embodiment of step S510;

[0016] Figure 8 It is based on the present disclosure Figure 5 A flowchart of an embodiment of step S530;

[0017] Figure 9 It is based on the present disclosure Figure 8 A schematic diagram of an embodiment of determining a resource selection window based on...;

[0018] Figure 10 It is based on the present disclosure Figure 5 A flowchart of another embodiment of step S530;

[0019] Figure 11 It is based on the present disclosure Figure 10 A flowchart of an embodiment of step S534;

[0020] Figure 12 It is based on the present disclosure Figure 10 A flowchart of another embodiment of step S534;

[0021] Figure 13 It is based on the present disclosure Figure 11 and 12 A schematic diagram of an embodiment of determining a resource selection window based on... and...;

[0022] Figure 14 It is based on the present disclosure Figure 11 and 12Schematic diagram of another embodiment of determining a resource selection window;

[0023] Figure 15 This disclosure is based on Figure 11 and 12 Schematic diagram of yet another embodiment of determining a resource selection window;

[0024] Figure 16 This disclosure is based on Figure 11 and 12 Schematic diagram of yet another embodiment of determining a resource selection window;

[0025] Figure 17 This disclosure is based on Figure 5 Flowchart of yet another embodiment of step S530;

[0026] Figure 18 This disclosure is based on Figure 17 Flowchart of an embodiment of step S536;

[0027] Figure 19 This disclosure is based on Figure 17 Flowchart of another embodiment of step S536;

[0028] Figure 20 This disclosure is based on Figure 18 and 19 Schematic diagram of an embodiment of determining a resource selection window;

[0029] Figure 21 This disclosure is based on Figure 18 and 19 Schematic diagram of another embodiment of determining a resource selection window;

[0030] Figure 22 This disclosure is based on Figure 18 and 19 Schematic diagram of yet another embodiment of determining a resource selection window;

[0031] Figure 23 This disclosure is based on Figure 18 and 19 Schematic diagram of yet another embodiment of determining a resource selection window;

[0032] Figure 24 Structural block diagram of an embodiment of the device for determining a resource selection window according to this disclosure;

[0033] Figure 25 Structural schematic diagram of an embodiment of an electronic device according to this disclosure. Detailed implementation manners

[0034] Example embodiments will now be described more fully with reference to the accompanying drawings. However, the example embodiments can be implemented in various 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 the 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 repeated description will be omitted.

[0035] In addition, 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 the embodiments of the present disclosure. However, those skilled in the art will realize that the technical solutions of the present disclosure may be practiced without one or more of the specific details, or other methods, components, devices, steps, etc. may be used. In other cases, well-known structures, methods, devices, implementations, or operations are not shown or described in detail to avoid obscuring the various aspects of the present disclosure.

[0036] In the present disclosure, unless otherwise clearly defined and limited, terms such as "connected" and "coupled" shall be construed broadly. For example, it may be a fixed connection, a detachable connection, or integrated; it may be an electrical connection or communicate with each other; it may be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present disclosure can be understood according to specific circumstances.

[0037] In addition, in the description of the present disclosure, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise specifically defined. "And / or" describes the association relationship of associated objects and indicates that there can be three relationships. For example, A and / or B can represent three situations: A exists alone, B exists alone, and both A and B exist simultaneously. The symbol " / " generally represents an "or" relationship between the associated objects before and after. The terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features.

[0038] Those skilled in the art can understand that the "user terminal", "terminal", and "terminal device" used herein include both devices with a wireless signal receiver that only has the ability to receive and no transmission ability, and devices with receiving and transmitting hardware that can perform two-way communication on a two-way communication link. Such devices may include: cellular or other communication devices with a single-line display or a multi-line display or cellular or other communication devices without a multi-line display; PCS (Personal Communication Service), which can combine voice, data processing, fax, and / or data communication capabilities; PDA (Personal Digital Assistant), which may include a radio frequency receiver, pager, Internet / intranet access, web browser, notepad, calendar, and / or GPS (Global Positioning System) receiver; conventional laptop and / or palm-top computers or other devices with and / or including a radio frequency receiver. The "terminal" and "terminal device" used herein can be portable, transportable, installed in a vehicle (air, sea, and / or land), or suitable for and / or configured to operate locally and / or in a distributed manner at any other location on the earth and / or in space. The "terminal" and "terminal device" used herein can also be a communication terminal, Internet access terminal, music / video playback terminal, such as a PDA, MID (Mobile Internet Device), and / or a mobile phone with music / video playback function, or can also be a smart device, set-top box, etc.

[0039] In LTE (Long Term Evaluation) and subsequent systems of LTE (such as also known as LTE-A (LTE Advanced), 4G (the 4th generation mobile communication technology), FRA (Future Radio Access), 5G (the 5th generation mobile communication technology), etc.), research is being conducted on D2D (Device to Device) technology for direct communication between user terminals without going through a wireless base station (eNode, abbreviated as eNB).

[0040] D2D can reduce the traffic between the user terminal and the base station. Even when the base station cannot communicate, such as during a disaster, communication between user terminals can still be carried out.

[0041] D2D can be divided into D2D discovery for finding other user terminals that can communicate and D2D communication (also known as D2D direct communication, direct communication between terminals, etc.) for direct communication between user terminals. Hereinafter, when not particularly distinguishing between D2D communication, D2D discovery, etc., it is simply referred to as D2D. In addition, the signal sent and received through D2D is called a D2D signal.

[0042] In addition, in 3GPP (3rd Generation Partnership Project), technologies for implementing V2X (Vehicle to Everything) by expanding D2D functions are being studied. Here, V2X is a part of ITS (Intelligent Transport Systems) and is a general term for V2V, which represents the communication form between vehicles, V2I (vehicle to infrastructure), which represents the communication form between a vehicle and a roadside unit (RSU) set on the roadside, V2N (vehicle to nomadic device), which represents the communication form between a vehicle and a driver's mobile terminal, and V2P (vehicle to pedestrian), which represents the communication form between a vehicle and a pedestrian's mobile terminal, etc.

[0043] Device-to-device communication is a sidelink (SL) transmission technology based on D2D. Similar to the uplink (UL) and downlink (DL), there are also control channels and data channels on the sidelink. The former is called the Physical Sidelink Control Channel (PSCCH), and the latter is called the Physical Sidelink Shared Channel (PSSCH). The PSCCH is used to indicate the time-frequency domain resource location of the PSSCH transmission, the modulation and coding scheme, and the priority of the data carried in the PSSCH, etc. The PSSCH is used to carry data. Different from the way of receiving or sending communication data through the base station in the traditional cellular system, the vehicle-to-everything (V2X) system adopts the direct communication mode from terminal to terminal, so it has higher spectral efficiency and lower transmission delay. Two transmission modes are defined in 3GPP: Mode A and Mode B.

[0044] Figure 1 It is a schematic diagram of an embodiment of Transmission Mode A of the present disclosure.

[0045] As Figure 1 shown, the wireless communication system provided in this embodiment may include a base station eNB, a user terminal UE1, and a user terminal UE2. The user terminal UE1 is assumed to represent the transmitting side, and the user terminal UE2 is assumed to represent the receiving side. However, both the user terminal UE1 and the user terminal UE2 have two functions: the transmitting function and the receiving function. Hereinafter, without particularly distinguishing between the user terminal UE1 and the user terminal UE2, it is simply described as "user terminal UE". The user terminal UE1 and the user terminal UE2 respectively have the cellular communication function of the user terminal UE in LTE and the D2D function including signal transmission and reception in the above channels.

[0046] In addition, the user terminal UE1 and the user terminal UE2 have the function of performing the operations described in this embodiment. In addition, for the cellular communication function and the existing D2D function, they may only have a part of the functions (within the range where the operations described in this embodiment can be performed), or they may have all the functions.

[0047] In addition, each user terminal UE may be any device with D2D function. For example, each user terminal UE is a vehicle, a terminal held by a pedestrian, a roadside unit (RSU of UE type with UE function), etc.

[0048] In addition, the base station eNB has a cellular communication function as the base station eNB in LTE, and functions (resource allocation function, setting information notification function, etc.) for enabling communication with the user terminal UE in the present embodiment. In addition, the base station eNB includes an RSU (an eNB-type RSU having the functions of an eNB).

[0049] In Mode A, the transmission resources of the user terminal UE are allocated by the base station, and the user terminal UE sends data on the sidelink according to the resources allocated by the base station. The base station can allocate resources for single transmission to the user terminal UE through the DL, or can also allocate semi-static transmission resources to the user terminal UE. In the LTE-V2X system, this Mode A is called Mode 3.

[0050] Figure 2 It is a schematic diagram of an embodiment of Transmission Mode B of the present disclosure.

[0051] As Figure 2 shown, in Mode B, the user terminal UE selects a resource in the resource pool for data transmission. Specifically, the user terminal UE can select transmission resources in the resource pool by means of listening, or can select transmission resources in the resource pool by means of random selection. In the LTE-V2X system, this Mode B is called Mode 4.

[0052] In the present embodiment, the user terminal UE selects an unoccupied resource by listening in the listening window, and uses the selected resource to send a D2D signal. "Listening" is performed, for example, by a method of measuring the received power (which can also be called received energy or received intensity), a method of receiving the SCI (Sidelink Control Information, sidelink control information) sent from other user terminals UE and decoding it to detect the resource positions of the allocated SCI and data, or a method of combining these methods, etc. As long as there is no special limitation, "resources" include time resources (e.g., subframes), or time and frequency resources (e.g., subchannels). The "D2D signal" can be an SCI, can also be data, can also be a group of SCI and data. In addition, this D2D signal can also be a discovery signal.

[0053] In V2X, especially in V2V (Vehicle to Vehicle, vehicle-to-vehicle), user terminals such as vehicles exist densely and move at high speeds. Therefore, the method of dynamically allocating resources is inefficient, so it is envisioned to use a method in which user terminals autonomously select resources.

[0054] Among them, the resource selection method for listening is as follows:

[0055] In LTE-V2X, when a new data packet arrives at time n (n is a real number greater than or equal to 0), resource selection is required. The user terminal can, according to the listening results in the listening window in the past, for example, 1 second (s, equal to 1000 ms, that is, in the range of [n - 1000, n - 1]), select resources within the resource selection window of [n + T1, n + T2] milliseconds (ms), where 0 <= T1 <= T th1 , where the first time threshold T th1 For example, it can take a value of 4 ms, and the selection of T1 should be less than or equal to the processing delay T of the user terminal proc,1 ; T th2 <= T2 <= T th3 , where the second time threshold T th2 For example, it can take a value of 20 ms, the third time threshold T th3 For example, it can take a value of 100 ms, and the selection of T2 needs to be within the delay requirement of the service (for example, the maximum transmission delay allowed for the service packet). For example, if the delay requirement of the service is 50 ms, then 20 ms <= T2 <= 50 ms; if the delay requirement of the service is 100 ms, then 20 ms <= T2 <= 100 ms.

[0056] When multiple user terminals independently select (including reselecting) transmission resources, if each user terminal freely selects resources, resource conflicts will occur, and the user terminal on the receiving side cannot properly receive signals.

[0057] Therefore, a listening-based resource selection method is proposed to listen to resources and select unoccupied or unused resources. The premise is that a time window (abbreviated as "listening window") for the user terminal to listen is preset in advance, and the size (period) of the listening window can be set to be the same as the period for the user terminal to semi-permanently send packets. The user terminal listens in the listening window to detect unoccupied resources. Since it can be judged that the detected resources are also unoccupied in the resource selection window, the user terminal regards the resources corresponding to the unoccupied resources in the resource selection window as resources capable of sending D2D signals, selects resources from these resources, and starts sending D2D signals.

[0058] Figure 3 is a schematic diagram of the listening-based resource selection method of the present disclosure.

[0059] As Figure 3As shown, it is assumed that the resource selection window is within [n, n + 100] ms. The boxes within the listening window to the left of the solid arrow above represent the resources already occupied by other UEs. Since this other UE will periodically reserve the corresponding resources, the boxes within the resource selection window to the right of the solid arrow are the resources that cannot be selected by the current UE. The boxes within the listening window to the left of the first dashed arrow below represent the resources not occupied by other UEs. Therefore, it is assumed that the boxes within the resource selection window to the right of the first dashed arrow are the resources selected by the current UE. The following three dashed arrows represent the periodic reservation of the corresponding resources for this current UE. Here in V2V, it is envisioned that when the user terminal autonomously selects resources, it does not select resources every time a packet is sent, but rather uses the once-selected resources semi-permanently. In the case of semi-permanently sending D2D signals, the user terminal UE only needs to perform listening when initially starting to send D2D signals, and there is no need to re-perform listening before periodically sending D2D signals after the second time. Additionally, the user terminal UE can also perform listening in the background in advance (that is, perform listening at a timing (subframe) when not sending D2D signals in advance), and re-select resources in the case of detecting the possibility of signal conflict (collision) with other user terminal UEs.

[0060] In the embodiments of the present disclosure, the selection window is set after the listening window. The size of the selection window needs to be set at least to be less than or equal to the size of the listening window. Additionally, when considering the effect of reducing latency, the size of the selection window is preferably shorter than the size of the listening window. Additionally, the selection window does not necessarily need to be set immediately after the listening window. For example, it is also possible to set the start position of the selection window after a specified offset (several subframes later, etc.) from the end position of the listening window.

[0061] To support the coexistence of multiple V2X UEs, when V2X UE1 selects transmission resources, it needs to consider the resources that V2X UE2 may occupy. A resource includes one or more consecutive sub-channels, and one sub-channel includes N consecutive Physical Resource Blocks (PRBs), where N is a positive integer greater than or equal to 1, and N is configured by higher-layer signaling or pre-configured.

[0062] The transmission resource selection method in the related art includes the following steps:

[0063] The main process for the terminal to select resources within the selection window is as follows:

[0064] The current UE takes all available resources within the selection window as a set A, and the current UE performs an exclusion operation on the resources in set A:

[0065] 1. If there is no listening result for some subframes within the listening window of the current UE, the resources on the corresponding subframes within the selection window are excluded.

[0066] 2. If the current UE detects a PSCCH within the listening window, measure the RSRP of the scheduled PSSCH. If the measured PSSCH-RSRP is higher than the PSSCH-RSRP threshold, and there is a resource conflict between the reserved transmission resources determined according to the reserved information in the SCI and the data to be sent by the current UE, then the current UE excludes this resource from set A. Among them, the selection of the PSSCH-RSRP threshold is determined by the priority information carried in the detected PSCCH and the priority of the data to be transmitted by the current UE.

[0067] 3. If the number of remaining resources in set A after excluding the resources in the above steps 1 and 2 is less than 20% of the total number of resources within the selection window, the current UE will increase the PSSCH-RSRP threshold by 3 dB, and repeat the above steps 1-2 until the number of remaining resources in set A is greater than 20% of the total number of resources within the selection window.

[0068] 4. The current UE performs S-RSSI (Sidelink Received Signal Strength Indicator) detection on the remaining resources in set A, and sorts them according to the energy level, and puts the 20% (relative to the number of resources in set A) resources with the lowest energy into set B.

[0069] 5. The current UE randomly selects a resource from set B with equal probability for data transmission.

[0070] In NR (New Radio) V2X, autonomous driving needs to be supported, so higher requirements are put forward for data interaction between vehicles, such as higher throughput, lower latency, higher reliability, larger coverage, and more flexible resource allocation, etc.

[0071] In NR V2X, high-priority users are supported to preempt the resources reserved by low-priority users. If UE1 (low priority) selects a resource and reserves this resource in the sent SCI, but when UE1 hears that the resource reserved by UE2 (high priority) conflicts with the resource reserved by UE1 before using this resource, then UE1 will reselect a resource. Specifically, UE1 reselects the resource with the conflict, and can continue to use the resources without conflict.

[0072] In the embodiments of the present disclosure, the priority of the UE may be the priority of the user terminal itself. For example, the priority of an ordinary vehicle is low, while the priority of an emergency vehicle is high. It may also be the priority of the data to be sent by the UE currently. For example, the priority of a packet notifying a traffic accident is high, while the priority of sending ordinary interaction information is low. Or it may be a combination of the two, etc. The current UE can obtain the priority information of other UEs through the SCI sent by other UEs it receives, and can also send its own priority information to other UEs through the SCI.

[0073] Figure 4 It is a schematic diagram of resource conflict occurrence and chain resource selection or reservation in the present disclosure.

[0074] In the embodiments of the present disclosure, one SCI can indicate at most K transmission resources, where K is a positive integer greater than or equal to 1. For example, K = 3 or 4. In the following illustrative examples, it is assumed that one SCI can indicate at most 4 transmission resources for illustration, but the present disclosure is not limited thereto. In addition to indicating the transmission resources of the sidelink data scheduled by the current SCI, the SCI sent by the terminal also indicates the remaining K - 1 transmission resources, indicating that the terminal reserves the K - 1 transmission resources.

[0075] As Figure 4 shown, assume that the transmission resources indicated by the SCI sent by UE1 at time n + t1 are located at n + t1, n + t2, n + t3, n + t4 respectively; among them, the transmission resource at time n + t1 is the transmission resource of the sidelink data scheduled by this SCI, and the transmission resources of n + t2, n + t3, n + t4 represent the transmission resources reserved by UE1. The transmission resources of UE2 are located at n + t1’, n + t2’, n + t3’, n + t4’ respectively, where the third resource n + t3 of UE1 and the third resource n + t3’ of UE2 overlap (in the figure, it is partially overlapping, and it can also be completely overlapping).

[0076] In one case, the SCI sent by UE1 at time n + t1 indicates that the transmission resources of n + t2, n + t3, n + t4 are reserved. If UE1 detects that UE2 has reserved the transmission resources of n + t2’, n + t3’, n + t4’ before sending data at time n + t2, and the transmission resource of n + t3’ of UE2 conflicts with the transmission resource n + t3 reserved by UE1, and the priority of UE2 is higher than that of UE1, UE1 will perform resource reselection. Here, only the resource in conflict with UE2, such as the resource of n + t3, can be reselected, and the resources without conflict, such as the resources of n + t2 and n + t4, do not need to be reselected. Therefore, when the terminal discovers resource conflict and triggers resource reselection, how to determine the resource selection window is a problem to be solved.

[0077] Another case is that when the SCI sent by UE1 at time n + t1 indicates that the transmission resources are located at n + t1, n + t2, n + t3, and n + t4 respectively, if there is no conflict with the resources of other users, UE1 will perform resource selection before sending the SCI at time n + t2. For example, it selects the transmission resource at n + t5 so that the SCI sent at time n + t2 can continue to indicate 4 transmission resources. This way of resource selection is called chained resource selection or reservation. Therefore, when the terminal performs chained resource selection or reservation, how to determine the resource selection window is also a problem that needs to be solved.

[0078] In the related art, only how to determine the size of the resource selection window when the terminal performs resource selection is discussed, but 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, remains an unsolved problem.

[0079] In addition, considering that V2X is a type of D2D, the problems described above are not limited to V2X and will occur in the entire D2D.

[0080] Hereinafter, embodiments of the present disclosure will be described with reference to the accompanying drawings. In addition, the embodiments described below are only examples, and the application of the embodiments of the present disclosure is not limited to the following embodiments. For example, the wireless communication system envisioned in this embodiment is a system based on the LTE method, but the present disclosure is not limited to LTE and can also be applied to other methods. In addition, in this specification and the claims, "LTE" is used in a broad sense and includes not only the communication methods corresponding to versions 8 or 9 of 3GPP, but also the fifth-generation communication methods corresponding to versions 10, 11, 12, 13, or 14 and later versions of 3GPP.

[0081] In addition, this embodiment mainly targets V2X, but the technology of this embodiment is not limited to V2X and can be widely applied to all D2D. In addition, the meaning of "D2D" includes V2X.

[0082] In addition, "D2D" is used in a broad sense and includes not only the process of transmitting and receiving D2D signals between user terminals UE, but also the process of the base station receiving (monitoring) D2D signals, and the process of the user terminal UE sending an uplink signal to the base station eNB in the case of RRC (Radio Resource Control) idle or when not connected to the base station eNB.

[0083] In V2X, the D2D technology described here can also be used, and the UE in the embodiments of the present disclosure can perform the transmission and reception of D2D signals based on this technology.

[0084] Figure 5 The method provided in the embodiment of the present disclosure can be executed by any terminal, and the present disclosure does not limit this.

[0085] like Figure 5 The method provided by the embodiment of the present disclosure may include the following steps.

[0086] In step S510, a first moment is determined, where the first moment is a moment for performing resource selection.

[0087] It is assumed here that the first moment is marked as n1, where n1 is a real number greater than or equal to 0, which may be the moment for resource selection. The resource selection in the embodiment of the present disclosure may include any one or more of resource reselection, resource selection, and chain resource selection or reservation.

[0088] In step S520, the reserved transmission resources at the first moment are obtained.

[0089] In step S530, a resource selection window at the first moment is determined according to the time domain position of the reserved transmission resources at the first moment.

[0090] The method for determining the resource selection window provided in the embodiment of the present disclosure is that when the terminal performs resource selection or resource reselection, if there are reserved transmission resources, the position of the resource selection window can be determined according to the time domain position of the reserved transmission resources. On the one hand, by adjusting the transmission resources of the terminal and performing resource selection or resource reselection, the resource load in the system is balanced, the interference effect 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 reliability of transmission is improved.

[0091] Figure 6 This disclosure is based on Figure 5 Flow chart of an embodiment of step S510. Figure 6 As shown, in the embodiment of the present disclosure, the above step S510 may further include the following steps.

[0092] In step S511, a second time n2 is determined, the second time n2 is before the first time n1, and the second time n2 is the time for performing resource selection. n2 is a real number greater than or equal to 0 and less than n1.

[0093] In step S512, a third time n3 is determined, where the third time n3 is the time domain position of the first transmission resource among K1 transmission resources selected when performing resource selection at the second time n2, where K1 is a positive integer greater than or equal to 1. n3 is a real number greater than n2.

[0094] In step S513, the first moment n1 is determined between the second moment n2 and the third moment n3.

[0095] Taking the above Figure 4 as an example, assume K1 = 4. UE1 selects four transmission resources, namely n + t1, n + t2, n + t3, and n + t4, within the resource selection window determined at moment n. If UE1 discovers that another UE has reserved any one or more of the resources n + t1, n + t2, n + t3, and n + t4, such as the transmission resource of n + t3, before the moment n + t1, and the priority of the other UE is higher than that of UE1, then UE1 needs to perform resource reselection between n and n + t1. When UE1 performs resource reselection, the reserved transmission resources of n + t1, n + t2, and n + t4 are available transmission resources and do not require reselection, while the resource at the moment n + t3 is an unavailable resource and requires reselection.

[0096] Figure 7 is another embodiment flowchart of step S510 based on Figure 5 of the present disclosure.

[0097] As Figure 7 shown, in the embodiment of the present disclosure, the above step S510 may further include the following steps.

[0098] In step S514, a fourth moment n4 is determined. The fourth moment n4 is before the first moment n1, and the fourth moment n4 is the moment for resource selection. n4 is a real number greater than or equal to 0 and less than n1.

[0099] In step S515, a fifth moment n5 is determined. The fifth moment n5 is the time domain position of the first transmission resource among the K2 transmission resources selected at the fourth moment n4. K2 is a positive integer greater than 1. n5 is a real number greater than n4.

[0100] In step S516, a sixth moment n6 is determined. The sixth moment n6 is the time domain position of the other transmission resources except the first transmission resource among the K2 transmission resources selected at the fourth moment n4. For example, n6 is the time domain position of the second transmission resource among the K2 transmission resources. n6 is a real number greater than n5.

[0101] In step S517, the first moment n1 is determined between the fifth moment n5 and the sixth moment n6.

[0102] Still taking the above Figure 4For example, assume that K2 = 4, and UE1 selects four transmission resources, namely n+t1, n+t2, n+t3, and n+t4, within the resource selection window determined at time n. If UE1 does not detect a resource conflict before time n+t1, then before sending the SCI at time n+t2, it needs to select a transmission resource, such as n+t5, so that the SCI sent at time n+t2 can also continue to indicate the four transmission resources n+t2, n+t3, n+t4, and n+t5. That is, UE1 needs to select a resource between n+t2 and n+t1.

[0103] Figure 8 This is an embodiment of step S530 based on the present disclosure Figure 5 The flowchart of an embodiment of step S530. As Figure 8 shown, in the embodiment of the present disclosure, the above step S530 may further include the following steps.

[0104] In step S531, according to the time domain position of the reserved transmission resource at the first moment, determine the lowest time domain position and the highest time domain position of the reserved transmission resource at the first moment.

[0105] Here, assume that the lowest time domain position of the reserved transmission resource of the terminal at the first moment is n+t low , and the highest time domain position is n+t high , where n represents the moment when the terminal selects or reselection resources. It should be understood that if the terminal only reserves one transmission resource at the first moment, then t low = t high .

[0106] In step S532, according to the lowest time domain position and the highest time domain position, determine the resource selection window at the first moment.

[0107] Figure 9 This is an embodiment of the present disclosure based on Figure 8 The schematic diagram of an embodiment of determining the resource selection window in a certain way.

[0108] As Figure 9 shown, the lower bound n+t low_bound1 = n+t low ; the upper bound of the resource selection window: n+t upper_bound1 = n+t high .

[0109] In the method for determining the resource selection window provided by the embodiment of the present disclosure, when the terminal selects or reselects resources, if there are already reserved transmission resources, the position of the resource selection window can be determined according to the time domain position of the reserved transmission resources. For example, resources can be selected between the lowest time domain position n+t low and the highest time domain position n+t high . FromFigure 9 As can be seen, the resource selection window determined by the method described in the embodiments of the present disclosure is smaller than the range of the resource selection window [n+T1, n+T2] determined by the related art. Therefore, on the one hand, when the user terminal performs resource selection in the resource selection window of [n+t low , n+t high , it can shorten the delay required from when it is determined that D2D signal transmission is to be performed until the actual D2D signal transmission starts; on the other hand, resource reselection and chained resource selection or reservation can also be achieved. In addition, by setting the resource selection window of [n+t low , n+t high , especially in the case where the period of semi-permanent D2D signal transmission is long (that is, in the case where the size of the listening window is large), the delay can be more effectively shortened. At the same time, the offset of the resource selection window determined by the method described in the embodiments of the present disclosure is larger than 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 from when the D2D signal that should be transmitted is generated. Therefore, the processing burden on the user terminal UE can be reduced.

[0110] Figure 10 is another flowchart of Embodiment of step S530 based on Figure 5 of the present disclosure. As Figure 10 shown, in the embodiments of the present disclosure, the above step S530 may further include the following steps.

[0111] In step S533, a first interval parameter t gap1 is determined, and the first interval parameter t gap1 is used to represent the maximum time interval between two adjacent transmission resources indicated by the sidelink control information SCI.

[0112] In the embodiments of the present disclosure, an indication field may be included in the SCI, which can be used to represent the time interval between any two adjacent transmission resources among the K transmission resources that the SCI can indicate. The maximum value of this time interval can be represented as t gap1 .

[0113] For example, assuming that the indication field in the SCI is 3 bits, the maximum time interval between two adjacent transmission resources that it can indicate is 8 time slots (since any two transmission resources will not be in the same time slot, so the value will not be 0, so the value range of 3 bits is 1 to 8). At this time, t gap1 = 8. It should be noted that the value of t gap1 here is only related to the number of bits included in the indication field of the SCI. For example, if the indication field in the SCI is j bits, where j is a positive integer greater than or equal to 1, then t gap1 = 2 j。It is independent of the maximum time interval between any two adjacent transmission resources among the K transmission resources actually indicated by the SCI, and still taking the above Figure 4 as an example, among the SCI sent at time n + t1, the 4 transmission resources indicated by the SCI are n + t1, n + t2, n + t3, and n + t4 respectively, but t gap1 is not equal to max(t2 - t1, t3 - t2, t4 - t3), but the maximum time interval between any two adjacent transmission resources among the multiple transmission resources indicated by the SCI sent at any time will not exceed t gap1 .

[0114] In step S534, according to the time-domain position of the reserved transmission resource at the first moment and the first interval parameter, determine the resource selection window at the first moment.

[0115] In the embodiments of the present disclosure, the terminal can determine the resource selection window for 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 that can be indicated in the SCI.

[0116] Figure 11 is a flowchart of an embodiment of step S534 based on Figure 10 of the present disclosure. As Figure 11 shown, in the embodiments of the present disclosure, the above step S534 may further include the following steps.

[0117] In step S5341, according to the time-domain position of the reserved transmission resource at the first moment, determine the lowest time-domain position n + t of the reserved transmission resource at the first moment low .

[0118] In step S5342, according to the first duration parameter T', the lowest time-domain position n + t low and the first interval parameter t gap1 , determine the lower bound n + t of the resource selection window at the first moment low_bound2 .

[0119] where the first duration parameter T' is related to the processing delay T of the electronic device proc,1 .

[0120] In some embodiments, it can be determined according to the following formula (1):

[0121] t low_bound2 = max(T1, t low - t gap1 ) (1)

[0122] According to the above formula (1), it can be known that if t low - tgap1 If it is less than T1, then T1 is selected to determine the lower bound of the selection window, where 0 ≤ T1 ≤ T proc,1 , and the selection of T1 can be based on the implementation of the terminal; if t low -t gap1 is greater than or equal to T1, then t low -t gap1 is selected to determine the lower bound of the selection window.

[0123] In some other embodiments, it can be determined according to the following formula (2):

[0124] t low_bound2 = max(T proc,1 , t low -t gap1 ) (2)

[0125] According to the above formula (2), it can be known that if t low -t gap1 is less than T proc,1 , then T proc,1 is selected to determine the lower bound of the selection window; if t low -t gap1 is greater than or equal to T proc,1 , then t low -t gap1 is selected to determine the lower bound of the selection window.

[0126] Figure 12 is a flowchart of another embodiment of step S534 based on Figure 10 of the present disclosure. As Figure 12 shown, in the embodiments of the present disclosure, the above step S534 may further include the following steps.

[0127] In step S5343, according to the time-domain position of the reserved transmission resource at the first moment, determine the highest time-domain position n + t of the reserved transmission resource at the first moment high .

[0128] In step S5344, according to the second duration parameter T2, the highest time-domain position n + t high and the first interval parameter t gap1 , determine the upper bound n + t of the resource selection window at the first moment upper_bound2 .

[0129] where the second duration parameter T2 is related to the delay requirement of the service.

[0130] In some embodiments, it can be determined according to the following formula (3):

[0131] t upper_bound2 = min(T2, thigh +t gap1 ) (3)

[0132] Among them, T th2 ≤T2≤T th3 , T th2 is a network-configured or pre-configured parameter, and the selection of T th2 can be based on terminal implementation. For example, T th2 is a parameter configured according to the time-domain requirements of the service, or a parameter configured according to the priority of the service. T th3 is a network-configured parameter, a pre-configured parameter, a parameter configured according to the priority of the service, or a parameter determined according to the delay requirement of the service.

[0133] In LTE V2X, the main services targeted are periodic services; in NR V2X, both periodic and aperiodic services need to be supported. In NR V2X, the resource selection window is redefined. The start time of the resource selection window is n+T1, and the end time of the resource selection window is (n+min(T2,T rm_PDB ), where T rm_PDB represents the remaining delay requirement. Therefore, in some other embodiments, it can be determined according to the following formula (4):

[0134] t upper_bound2 =min(T2,T rm_PDB , t high +t gap1 ) (4)

[0135] For example, when data arrives at the terminal at time n and resource selection is required, the processing delay of the terminal is 4 ms, and the delay requirement of the service is 100 ms. Then the selection window determined by the terminal at time n is [n+4,n+100] ms; 4 transmission resources are selected within the [n+4,n+100] ms selection window. Assuming they are located at n+10, n+20, n+30, and n+40 time slots respectively, the terminal indicates these 4 transmission resources in the SCI sent at time n+10. After the terminal sends the SCI and the corresponding data at n+10, resource selection is required between n+10 and n+20, for example, at n+15, to select an additional transmission resource to achieve chained resource selection or reservation. Denote the time n+15 as n'. n' is the time for resource selection.

[0136] If the maximum time interval between two adjacent transmission resources indicated in the SCI is 8 time slots, that is, t gap1 =8. Since there are already 3 reserved transmission resources when resource selection is performed at time n', located at n'+5, n'+15, and n'+25 time slots respectively, that is, t low =5, thigh =25, so t low -t gap1 = -3, and T proc,1 =4, therefore, according to the above formula (2), the lower bound of the resource selection window is determined to be n'+T proc,1 , therefore, when the terminal selects resources at time n', the lower bound of the determined resource selection window is n'+4.

[0137] t high +t gap1 =33, and T rm_PDB =85, therefore, according to the above formula (4), the upper limit of the resource selection window is determined to be n'+t high +t gap1 , that is, when the terminal selects resources at time n', the upper limit of the resource selection window is determined to be n'+32.

[0138] Therefore, the resource selection window determined by the terminal at time n' is [n'+4,n'+32]. The selection window already includes 3 transmission resources, namely n'+5, n'+15, and n'+25. The terminal only needs to select one more transmission resource in the selection window, and the newly selected transmission resource and the existing 3 transmission resources can be indicated by SCI.

[0139] The specific examples are as follows Figure 13 - 16 As shown, in the example here, the upper bound of the resource selection window only considers T2 for example, without considering T rm_PDB According to the relevant technology, when the terminal selects or reselects resources at time n, the starting position of its resource selection window is n+T1 and the ending position is n+T2. However, because the terminal already has reserved transmission resources when selecting or reselecting resources, the figure shows two reserved transmission resources, corresponding to the lowest time domain position n+t low and the highest temporal position n+t high ; If the maximum time interval between two adjacent transmission resources that can be indicated by SCI is t gap1 , then based on the above resource selection window [n+T1,n+T2], 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 beyond the indication range of SCI and are therefore unavailable resources.

[0140] Figure 13 This disclosure is based on Figure 11 and 12 A schematic diagram of an embodiment of determining a resource selection window in a manner as described above.

[0141] like Figure 13 As shown in the figure, tlow -t gap1 For the case where it is greater than T1, the lower bound n + t of the corresponding resource selection window low_bound2 = n + t low -t gap1 ; t high +t gap1 is less than T2, so the upper bound n + t of the corresponding resource selection window upper_bound2 = n + t high +t gap1 .

[0142] Figure 14 is a schematic diagram of another embodiment of the resource selection window determined by the present disclosure based on Figure 11 and 12 .

[0143] As Figure 14 shown, in the figure, it is given that when t low -t gap1 is less than or equal to T1, the lower bound n + t of the corresponding resource selection window low_bound2 = n + T1; t high +t gap1 is less than T2, so the upper bound n + t of the corresponding resource selection window upper_bound2 = n + t high +t gap1 .

[0144] Figure 15 is a schematic diagram of another embodiment of the resource selection window determined by the present disclosure based on Figure 11 and 12 .

[0145] As Figure 15 shown, in the figure, it is given that when t low -t gap1 is greater than T1, the lower bound n + t of the corresponding resource selection window low_bound2 = n + t low -t gap1 ; t high +t gap1 is greater than or equal to T2, so the upper bound n + t of the corresponding resource selection window upper_bound2 = n + T2.

[0146] Figure 16 is a schematic diagram of another embodiment of the resource selection window determined by the present disclosure based on Figure 11 and 12 .

[0147] As Figure 16 shown, in the figure, it is given that when t low -t gap1For the case less than or equal to T1, thus the lower bound n + t of the corresponding resource selection window low_bound2 = n + T1; t high + t gap1 is greater than or equal to T2, thus the upper bound n + t of the corresponding resource selection window upper_bound2 = n + T2.

[0148] Figure 17 is another embodiment flowchart of step S530 based on the present disclosure Figure 5 As shown, in the embodiment of the present disclosure, the above step S530 may further include the following steps. Figure 17 As shown, in the embodiment of the present disclosure, the above step S530 may further include the following steps.

[0149] In step S535, determine the second interval parameter t gap2 , where the second interval parameter t gap2 represents the maximum time interval between the transmission resources indicated by the sidelink control information SCI.

[0150] In the embodiment of the present disclosure, the SCI may include a bitmap, and each bit in the bitmap may be used to indicate whether there are reserved transmission resources in the time slot corresponding to the bit. For example, the SCI includes a 16-bit bitmap. If the value of the bitmap is 0000 0100 1000 0010, it indicates whether the corresponding time slots among the 16 time slots starting from time n include reserved transmission resources. The 16 bits respectively correspond to time slots n, n + 1,..., n + 15. Since the SCI sent at time n indicates the transmission resources at that time, three additional reserved transmission resources also need to be indicated by the bitmap in the SCI. In the above example, the time slots corresponding to the three bits with a value of 1 are time slots n + 5, n + 8, and n + 14.

[0151] In the embodiment of the present disclosure, the second interval parameter t gap2 represents the maximum time interval between the transmission resources that the SCI can indicate. It should be noted that the value of t gap2 depends on the number of bits i of the bitmap, i is a positive integer greater than 1, and t gap2 = i - 1, and is independent of the value of each bit of the bitmap. For example, in the above example, the bitmap includes 16 bits, then t gap2 = 15.

[0152] In step S536, determine the resource selection window of the first moment according to the time domain position of the reserved transmission resources at the first moment and the second interval parameter.

[0153] In the embodiments of the present disclosure, when the terminal selects or reselects resources, if there are reserved transmission resources, the terminal may determine a resource selection window according to the time domain position of the reserved transmission resources and the maximum time interval between the transmission resources that can be indicated in the SCI.

[0154] At this time, the lower bound and the upper bound of the resource selection window are respectively:

[0155] Figure 18 This is an embodiment of the present disclosure based on Figure 17 of the flowchart of step S536. As Figure 18 shown, in the embodiments of the present disclosure, the above step S536 may further include the following steps.

[0156] In step S5361, according to the time domain position of the reserved transmission resources at the first moment, determine the highest time domain position n + t of the reserved transmission resources at the first moment high .

[0157] In step S5362, according to the first duration parameter T', the highest time domain position n + t high and the second interval parameter t gap2 , determine the lower bound n + t of the resource selection window at the first moment low_bound3 .

[0158] Wherein the first duration parameter T' is related to the processing delay T of the electronic device proc,1 .

[0159] In some embodiments, it may be determined according to the following formula (5):

[0160] t low_bound3 = max(T1, t high - t gap2 ) (5)

[0161] That is, if t high - t gap2 is less than T1, then select T1 to determine the lower bound of the selection window; if t high - t gap2 is greater than or equal to T1, then select t high - t gap2 to determine the lower bound of the selection window.

[0162] In other embodiments, it may be determined according to the following formula (6):

[0163] t low_bound3 = max(T proc,1 , t high - t gap2 ) (6)

[0164] That is, if t high -t gap2 is less than T proc,1 , then select T proc,1 to determine the lower bound of the selection window; if t high -t gap2 is greater than or equal to T proc,1 , then select t high -t gap2 to determine the lower bound of the selection window.

[0165] Figure 19 is a flowchart of another embodiment of step S536 of the present disclosure based on Figure 17 . As Figure 19 shown, in the embodiment of the present disclosure, the above step S536 may further include the following steps.

[0166] In step S5363, according to the time-domain position of the reserved transmission resource at the first moment, determine the lowest time-domain position t low of the reserved transmission resource at the first moment.

[0167] In step S5364, according to the second duration parameter T2, the lowest time-domain position t low and the second interval parameter t gap2 , determine the upper bound t upper_bound3 of the resource selection window at the first moment.

[0168] where the second duration parameter T2 is related to the delay requirement of the service.

[0169] In some embodiments, it can be determined according to the following formula (7):

[0170] t upper_bound3 = min(T2, t low + t gap2 ) (7)

[0171] That is, if t low + t gap2 is less than T2, then select t low + t gap2 to determine the upper bound of the selection window; if t low + t gap2 is greater than or equal to T2, then select T2 to determine the upper bound of the selection window.

[0172] In some other embodiments, it can be determined according to the following formula (8):

[0173] t upper_bound3 = min(T2, T rm_PDB , t low + t gap2 ) (8)

[0174] For example, when data arrives at the terminal at time n and resource selection is required, the processing delay of the terminal is 4 ms, and the delay requirement for this service is 100 ms. The selection window determined by the terminal at time n is [n + 4, n + 100]; four transmission resources are selected within this selection window, which are assumed to be located in time slots n + 6, n + 12, n + 14, and n + 15 respectively. The terminal indicates these four transmission resources respectively in the SCI sent at time slot n + 6. Relative to time n + 6, the bit map in this SCI is: 0000 0010 1100 0000. After the terminal sends the SCI and the corresponding data at time n + 6, resource selection is required between n + 6 and n + 12, for example, at time n + 8, to select an additional transmission resource to achieve chained resource selection or reservation. Denote time n + 8 as n', that is, the time for resource selection.

[0175] If the maximum time interval of the transmission resources indicated in the SCI is 15 time slots, for example, multiple reserved transmission resources are indicated by a 16-bit map, that is, t gap2 = 15; since there are already three reserved transmission resources when resource selection is performed at time n', which are located in time slots n' + 4, n' + 6, and n' + 7 respectively, that is, t low = 4, t high = 7, so t high - t gap2 = -8, while T proc,1 = 4. Therefore, according to the above formula (6), the lower bound of the resource selection window is n' + T proc,1 . Therefore, when the terminal performs resource selection at time n', the determined lower bound of the resource selection window is n' + 4.

[0176] t low + t gap2 = 19, while T rm_PDB = 85. Therefore, according to the above formula (8), the upper bound of the resource selection window is n' + t low + t gap2 . Therefore, when the terminal performs resource selection at time n', the determined upper bound of the resource selection window is n' + 19.

[0177] Therefore, the resource selection window determined by the terminal at time n' is [n' + 4, n' + 19]. This selection window already includes three transmission resources, namely n' + 4, n' + 6, and n' + 7. The terminal only needs to select one more transmission resource within this selection window, and the newly selected transmission resource and the existing three transmission resources can be indicated by the SCI.

[0178] The following is an example in combination with Figure 20 - 23 Here, T rm_PDBAs shown in the figure, the terminal selects or reselects resources at time n. The starting position of its resource selection window is n + T1, and the ending position is n + T2. However, since the terminal already has reserved transmission resources when selecting or reselecting resources, two reserved transmission resources are shown in the figure, and the corresponding time domain positions are n + t low and n + t high . If the maximum time interval between the transmission resources that can be indicated by the SCI is t gap2 , then based on the above resource selection window [n + T1, n + T2], the position of the resource selection window can be further limited to [n + t low_bound3 , n + t upper_bound3 . The resources outside this selection window exceed the indication range of the SCI and are therefore unavailable resources.

[0179] Figure 20 is a schematic diagram of an embodiment of the present disclosure for determining the resource selection window based on Figure 18 and 19 .

[0180] As Figure 20 shown, t high -t gap2 shows a situation where it is greater than T1. Therefore, the lower bound n + t low_bound3 of the corresponding resource selection window = n + t high -t gap2 ; t low +t gap2 is less than T2. Therefore, the upper bound n + t upper_bound3 of the corresponding resource selection window = n + t low +t gap2 .

[0181] Figure 21 is a schematic diagram of another embodiment of the present disclosure for determining the resource selection window based on Figure 18 and 19 .

[0182] As Figure 21 shown, t high -t gap2 shows a situation where it is less than or equal to T1. Therefore, the lower bound n + t low_bound3 of the corresponding resource selection window = n + T1; t low +t gap2 is less than T2. Therefore, the upper bound n + t upper_bound3 of the corresponding resource selection window = n + t low +t gap2 .

[0183] Figure 22 is a schematic diagram of the present disclosure based on Figure 18 and 19Schematic diagram of another embodiment of determining a resource selection window in a certain manner.

[0184] As Figure 22 shown, t high -t gap2 gives the case where it is less than or equal to T1, so the lower bound n + t of the corresponding resource selection window low_bound3 = n + T1; t low +t gap2 is greater than or equal to T2, so the upper bound n + t of the corresponding resource selection window upper_bound3 = n + T2.

[0185] Figure 23 This is a schematic diagram of yet another embodiment of determining a resource selection window by the present disclosure based on Figure 18 and 19 in a certain manner.

[0186] As Figure 23 shown, t high -t gap2 gives the case where it is greater than T1, so the lower bound n + t of the corresponding resource selection window low_bound3 = n + t high -t gap2 ; t low +t gap2 is greater than or equal to T2, so the upper bound n + t of the corresponding resource selection window upper_bound3 = n + T2.

[0187] In the method for determining a resource selection window provided by the embodiments of the present disclosure, when a terminal performs resource selection or resource reselection, if there are reserved transmission resources, the position of the resource selection window can be determined according to the time interval between the time domain position of the reserved transmission resources and the transmission resources indicated by the SCI. As can be seen from the above embodiments, the resource selection window determined by using the method described in 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. Therefore, on the one hand, when a user terminal performs resource selection in the resource selection window, the delay required from the time of determining that D2D signal transmission is to be performed until the actual start of D2D signal transmission can be shortened; on the other hand, resource reselection and chained resource selection or reservation can also be achieved. In addition, by setting the resource selection window, especially in the case where the period of semi-permanently transmitting D2D signals is long (that is, in the case where the size of the listening window is large), the delay can be more effectively shortened. At the same time, the offset of the resource selection window determined by using the method described in the embodiments 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 from the generation of the D2D signal that should be transmitted. Therefore, the processing burden on the user terminal UE can be reduced.

[0188] In an exemplary embodiment, the method may further include: when selecting resources within the resource selection window at the first moment, excluding the transmission resources on the time slot where the reserved transmission resources at the first moment are located.

[0189] For example, assume that the resource selection window determined by the terminal at time n' is [n'+4, n'+19]. This selection window already includes 3 transmission resources, namely n'+4, n'+6, and n'+7. When the terminal selects transmission resources within this selection window, it needs to exclude all the transmission resources on the time slots n'+4, n'+6, and n'+7. For example, if there are 100 PRBs on the n'+4 time slot and 10 of them are reserved, then when selecting resources at time n', all 100 PRBs need to be excluded.

[0190] Generally, a terminal can only send one sidelink data channel at the same moment, that is, a terminal can only send one PSSCH on one time slot and cannot send more than one PSSCH channel. Therefore, when the terminal selects resources, if there are already reserved transmission resources, according to the above embodiment, the resource selection window includes the already reserved transmission resources. Therefore, when the terminal selects resources, it cannot select transmission resources on the time domain resources where the reserved transmission resources are located, that is, during the resource selection process, the terminal needs to exclude the transmission resources on the time domain resources where the already reserved transmission resources in the resource selection window are located.

[0191] The method for determining the resource selection window provided by the embodiments of the present disclosure gives the position of the resource selection window when the terminal selects resources according to the time domain position of the reserved transmission resources and the time interval indicated by the SCI, so that the transmission resources selected by the terminal within this selection window can be indicated by the SCI. Moreover, when the terminal selects resources, excluding the transmission resources on the already reserved transmission resources can avoid resource conflicts.

[0192] In the embodiments of the present disclosure, the user equipment UE may use the resource selection with listening only when reselecting resources, and does not perform listening during the resource selection at the initial transmission but randomly selects resources within the selection window. Since there is no need to always perform listening in the background, the battery consumption of the user equipment UE can be reduced. The transmission resource pools used in the random resource selection and the listening-based resource selection may be different. For example, the resource selection method applicable to each resource pool can be set (in advance) in the user equipment UE by a higher layer.

[0193] In addition, when the user equipment UE performs listening and detects that the interference level (or RSSI) is above a specified threshold, it can fallback from listening-based resource selection to random resource selection. The number of resource selection candidates increases, and a randomization effect of interference can be expected. The user equipment UE can switch whether to perform such an action according to the number of listening resources / subframes, the number of resource selection candidates, and / or the terminal capabilities, etc. The threshold of the interference level can be set (in advance) in the user equipment UE by a higher layer.

[0194] The user equipment UE can also change the size of the selection window that may be obtained when performing listening-based resource selection and when performing random resource selection. For example, when performing random resource selection, the randomization effect can be increased by specifying a larger selection window size. The size of the selection window can also be set according to each packet priority and resource pool.

[0195] The user equipment UE can relax the listening process according to the terminal capabilities or resource pool settings. For example, the listening can consist of steps of decoding or measuring based on control information and steps of power detection (such as RSSI measurement), but the user equipment UE can also only perform the power detection step among them. In this case, the user equipment UE does not need to perform blind detection of control information, and can reduce the terminal cost and power consumption.

[0196] In the case of semi-permanently transmitting D2D signals, the user equipment UE is allowed to perform listening before initially starting the transmission of D2D signals, and in subsequent cycles, transmit D2D signals through the selected resources. In addition, since the user equipment UE transmits D2D signals through periodic resources after the selected resources, it does not perform listening (skips) in the resources where D2D signals are not transmitted in the second and subsequent times. When operating in this way, the same user equipment UE can continue to use the same resources. Therefore, the user equipment UE can also be regarded as having occupied the resources and their subsequent cycles in which it has not performed (skipped) listening as resources for transmitting D2D signals, and uniformly excluded from the resource selection candidates.

[0197] Figure 24 FIG. is a structural block diagram of an embodiment of an apparatus for determining a resource selection window according to the present disclosure.

[0198] As Figure 24 shown, the apparatus 2400 for determining a resource selection window provided by an embodiment of the present disclosure may include a first moment determination module 2410, a reserved resource acquisition module 2420, and a selection window determination module 2430.

[0199] Among them, the first moment determination module 2410 may be configured to determine a first moment, which is the moment for resource selection. The reserved resource acquisition module 2420 may be configured to acquire the reserved transmission resources at the first moment. The selection window determination module 2430 may be configured to determine a resource selection window at the first moment according to the time domain position of the reserved transmission resources at the first moment.

[0200] In an exemplary embodiment, the selection window determination module 2430 may include: a high and low time domain position determination unit, which may be configured to determine the lowest time domain position and the highest time domain position of the reserved transmission resources at the first moment according to the time domain position of the reserved transmission resources at the first moment; a first selection window determination unit, which may be configured to determine the resource selection window at the first moment according to the lowest time domain position and the highest time domain position.

[0201] In an exemplary embodiment, the selection window determination module 2430 may include: a first interval parameter determination unit, which may be configured to determine a first interval parameter, where the first interval parameter is used to represent the maximum time interval between two adjacent transmission resources indicated by the sidelink control information; a second selection window determination unit, which may be configured to determine the resource selection window at the first moment according to the time domain position of the reserved transmission resources at the first moment and the first interval parameter.

[0202] In an exemplary embodiment, the second selection window determination unit may include: a first lowest time domain position determination subunit, which may be configured to determine the lowest time domain position of the reserved transmission resources at the first moment according to the time domain position of the reserved transmission resources at the first moment; a first selection window lower bound determination subunit, which may be configured to determine the lower bound of the resource selection window at the first moment according to a first duration parameter, the lowest time domain position, and the first interval parameter. Wherein the first duration parameter is related to the processing delay of the electronic device.

[0203] In an exemplary embodiment, the second selection window determination unit may include: a first highest time domain position determination subunit, which may be configured to determine the highest time domain position of the reserved transmission resources at the first moment according to the time domain position of the reserved transmission resources at the first moment; a first selection window upper bound determination subunit, which may be configured to determine the upper bound of the 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 the delay requirement of the service.

[0204] In an exemplary embodiment, the selection window determination module 2430 may include: a second interval parameter determination unit configured to determine a second interval parameter, where the second interval parameter represents the maximum time interval between transmission resources indicated by sidelink control information; and a third selection window determination unit configured to determine a resource selection window at the first moment according to the time domain position of the reserved transmission resources at the first moment and the second interval parameter.

[0205] In an exemplary embodiment, the third selection window determination unit may include: a second highest time domain position determination subunit configured to determine the highest time domain position of the reserved transmission resources at the first moment according to the time domain position of the reserved transmission resources at the first moment; and a second selection window lower bound determination subunit configured to determine the lower bound of the resource selection window at the first moment according to a first duration parameter, the highest time domain position, and the second interval parameter. The first duration parameter is related to the processing delay of the electronic device.

[0206] In an exemplary embodiment, the third selection window determination unit may include: a second lowest time domain position determination subunit configured to determine the lowest time domain position of the reserved transmission resources at the first moment according to the time domain position of the reserved transmission resources at the first moment; and a second selection window upper bound determination subunit configured to determine the upper bound of the resource selection window at the first moment according to a second duration parameter, the lowest time domain position, and the second interval parameter. The second duration parameter is related to the delay requirement of the service.

[0207] In an exemplary embodiment, the first moment determination module 2410 may include: a second moment determination unit configured to determine a second moment, where the second moment is before the first moment and is the moment for resource selection; a third moment determination unit configured to determine a third moment, where the third moment is the time domain position of the first transmission resource among the K1 transmission resources selected at the second moment for resource selection, and K1 is a positive integer greater than or equal to 1; and a first moment determination unit configured to determine the first moment between the second moment and the third moment.

[0208] In an exemplary embodiment, the first moment determination module 2410 may include: a fourth moment determination unit configured to determine a fourth moment that is before the first moment and is a moment for resource selection; a fifth moment determination unit configured to determine a fifth moment that is a time domain position of a first transmission resource among K2 transmission resources selected during resource selection at the fourth moment, where K2 is a positive integer greater than 1; a sixth moment determination unit configured to determine a sixth moment that is a time domain position of other transmission resources except the first transmission resource among the K2 transmission resources selected during resource selection at the fourth moment; and a first moment acquisition unit configured to determine the first moment between the fifth moment and the sixth moment.

[0209] In an exemplary embodiment, the apparatus 2400 for determining a resource selection window may further include: a resource exclusion module configured to exclude transmission resources on a time slot where reserved transmission resources at the first moment are located when performing resource selection within the resource selection window at the first moment.

[0210] The electronic device in the embodiments of the present disclosure may be the user terminal UE in the above embodiments, which at least has a function for performing actions in accordance with LTE and may execute a part of the user terminal UE processing described above.

[0211] The user terminal UE has a signal sending module that has a function of generating various physical layer signals according to high-layer signals sent from the user terminal UE and performing wireless transmission. In addition, the signal sending module has a D2D signal sending function and a cellular communication sending function. In addition, the signal sending module has a function of sending D2D signals using the selected resources.

[0212] In addition, it may also be that the signal sending module uses the resources for sending D2D signals to send reservation information indicating that the signal is reserved by the selected "resources for reserving D2D signal transmission".

[0213] The user terminal UE further includes a signal receiving module that includes functions of wirelessly receiving various signals from other user terminal UEs or a base station eNB and obtaining higher-layer signals from the received physical layer signals. In addition, the signal receiving module has a D2D signal receiving function and a cellular communication receiving function.

[0214] The user equipment UE has the function of detecting one or more resources in a selection window that is later than a listening window and can send D2D signals by listening in the listening window. The user equipment UE has the function of selecting a resource for sending a D2D signal from the detected one or more resources. In addition, when multiple resources are detected, the user equipment UE can also decide, either autonomously or according to an indication from the base station eNB, whether to randomly select a resource for sending a D2D signal from the multiple resources or select a resource for sending a D2D signal according to specified conditions. In addition, the user equipment UE can also select a resource for reserving the sending of a D2D signal from one or more resources capable of reserving the sending of the detected D2D signal.

[0215] For the specific implementation of the modules, units, and subunits of the apparatus for determining a resource selection window provided by the embodiments of the present disclosure, reference may be made to the content of the method for determining a resource selection window provided in the above embodiments, which will not be elaborated herein.

[0216] Figure 25 is a schematic structural diagram of an embodiment of an electronic device of the present disclosure. As Figure 25 shown, the electronic device 2500 provided by the embodiments of the present disclosure may include a storage unit 2510 and a processing unit 2520.

[0217] Among them, the storage unit 2510 may be used to store a program for determining a resource selection window. The processing unit 2520 may be used to run the program for determining a resource selection window. When the program for determining a resource selection window is executed, the method for determining a resource selection window as described in any of the above embodiments is run.

[0218] In the embodiments of the present disclosure, the electronic device has an RF (Radio Frequency) module for performing processing related to wireless signals, a BB (Base Band) processing module for performing baseband signal processing, and a UE control module for performing processing such as at a higher layer.

[0219] The RF module generates a wireless signal to be sent from the antenna by performing D / A (Digital-to-Analog) conversion, modulation, frequency conversion, power amplification, etc. on the digital baseband signal received from the BB processing module. In addition, by performing frequency conversion, A / D (Analog to Digital) conversion, demodulation, etc. on the received wireless signal, a digital baseband signal is generated and transmitted to the BB processing module. The RF module includes, for example, a part of the signal sending module and a part of the signal receiving module.

[0220] The BB processing module performs processing for converting IP (Internet Protocol Address) packets and digital baseband signals into each other. The DSP (Digital Signal Processor) is a processor that performs signal processing in the BB processing module. The memory is used as the working area of the DSP. The BB processing module includes, for example, a part of the signal transmission module and a part of the signal reception module.

[0221] The UE control module performs protocol processing at the IP layer, processing of various application programs, etc. The processor is a processor that performs the processing carried out by the UE control module. The memory is used as the working area of the processor.

[0222] The present disclosure embodiment also provides a base station. The base station eNB has a signal transmission module, a signal reception module, and a notification module, and at least also has a function for performing operations according to LTE. As long as the operations of this embodiment can be executed, the function classification and the names of the functional parts can be arbitrary.

[0223] The signal transmission module includes a function of generating various signals at the physical layer based on the high-layer signals transmitted from the user terminal UE and performing wireless transmission. The signal reception module includes a function of wirelessly receiving various signals from the user terminal UE and obtaining higher-layer signals based on the received physical layer signals.

[0224] The notification module uses broadcast information or RRC signaling to notify the user terminal UE of various information used by the user terminal UE for performing the operations of this embodiment. Additionally, the various information is, for example, information indicating the setting of the resource pool, information indicating the start position and end position of each window (listening window, selection window, and reservation window), etc.

[0225] The entire functional structure of the user terminal UE and the base station eNB described above can be implemented by a hardware circuit (for example, one or more chips), or a part can be constituted by a hardware circuit, and the other part can be implemented by a CPU and a program.

[0226] In an exemplary embodiment of the present disclosure, a readable storage medium is further provided, on which a program product capable of implementing the above method of this specification is stored. In some possible implementation manners, various aspects of the present disclosure can also be implemented in the form of a program product, which includes program code. When the program product runs on a terminal device, the program code is used to cause the terminal device to execute the steps according to various exemplary embodiments of the present disclosure described in the above embodiment part of this specification.

[0227] As described above, the structure of each device (user terminal UE / base station eNB) described in this embodiment may be a structure implemented by a CPU (processor) executing a program in the device having a CPU and a memory, or may be a structure implemented by hardware such as a hardware circuit having the processing logic described in this embodiment, or may also be a structure in which a program and hardware coexist.

[0228] The above describes various embodiments of the present disclosure, but the disclosed invention is not limited to such embodiments. Those of ordinary skill in the art should understand various variations, modifications, substitution examples, replacement examples, etc. Specific numerical examples are used for the purpose of facilitating understanding of the invention, but these numerical values are only examples as long as not specifically indicated, and any appropriate arbitrary values may also be used. The distinction of items in the above description is not essential for the present disclosure. The matters described in two or more items can be combined as needed, or the matters described in one item can be applied to the matters described in other items (as long as there is no contradiction). The boundary of the functional units or processing units in the functional block diagram does not necessarily correspond to the boundary of the physical components. The actions of multiple functional units can be performed by one physical component, or the actions of one functional unit can be performed by multiple physical components. The timing and process described in the embodiment can be swapped in order without contradiction. For the purpose of facilitating the description of processing, the user terminal UE / base station eNB is illustrated using a functional block diagram, and such a device can also be implemented by hardware, software, or a combination thereof. The software that operates according to the processor included in the user terminal UE according to the embodiment of the present disclosure and the software that operates according to the processor included in the base station eNB according to the embodiment of the present disclosure can also be stored in a random access memory, flash memory, read-only memory, register, hard disk, removable disk, database, server, and other appropriate arbitrary storage media, respectively.

[0229] In addition, the terms described in this specification and / or the terms required for understanding this specification may be replaced with terms having the same or similar meanings. For example, a channel and / or a symbol may be a signal. In addition, a signal may be a message.

[0230] For the UE, those skilled in the art sometimes also use the following terms to refer to it: user station, mobile unit, user unit, radio unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile user station, access terminal, mobile terminal, wireless terminal, remote terminal, handset, user agent, mobile client, client, or some other appropriate terms.

[0231] Each form / embodiment described in this specification can be used alone, in combination, or switched during execution.

[0232] As used in this specification, the term "based on" does not mean "based solely on" unless otherwise specified. In other words, the term "based on" means both "based solely on" and "based at least on".

[0233] In addition, for the processing procedures, timings, etc. of each form / embodiment described in this specification, the order can be swapped without contradiction. For example, for the methods described in this specification, the elements of various steps are presented in an exemplary order, but are not limited to the specific order presented.

[0234] The input / output information, etc. can be stored in a specific location (e.g., a memory), or can be managed using a management table. The input / output information, etc. can be rewritten, updated, or appended. The output information, etc. can also be deleted. The input information, etc. can also be sent to other devices.

[0235] Any of a variety of different technologies can be used to represent the information, signals, etc. described in this specification. For example, the data, commands, instructions, information, signals, bits, symbols, chips, etc. that may be involved in the entire above description can be represented by voltage, current, electromagnetic waves, magnetic fields or magnetic particles, optical fields or photons, or any combination thereof.

[0236] The present disclosure is not limited to the above embodiments, and includes various variations, modifications, alternatives, substitutions, etc. without departing from the spirit of the present disclosure.

[0237] Although the present disclosure has been described with reference to several exemplary embodiments, it should be understood that the terms used are descriptive and exemplary, rather than restrictive. Since the present disclosure can be embodied in many forms without departing from the spirit or essence of the invention, it should be understood that the above embodiments are not limited to any of the foregoing details, but should be construed broadly within the spirit and scope defined by the appended claims. Therefore, all changes and modifications that fall within the scope of the claims or their equivalents should be covered by the appended claims.

Claims

1. A method for determining a resource selection window, characterized in that, comprising: determining a first moment, where the first moment is the moment for resource selection; obtaining the reserved transmission resources at the first moment; determining the resource selection window at the first moment according to the time domain position of the reserved transmission resources at the first moment; wherein, the determining the first moment includes: determining a second moment, the second moment being before the first moment, and the second moment being the moment for resource selection; determining a third moment, the third moment being the time domain position of the first transmission resource among the K1 transmission resources selected when resource selection is performed at the second moment, where K1 is a positive integer greater than or equal to 1; determining the first moment between the second moment and the third moment; or, the determining the first moment includes: determining a fourth moment, the fourth moment being before the first moment, and the fourth moment being the moment for resource selection; determining a fifth moment, the fifth moment being the time domain position of the first transmission resource among the K2 transmission resources selected when resource selection is performed at the fourth moment, where K2 is a positive integer greater than 1; determining a sixth moment, the sixth moment being the time domain position of the other transmission resources among the K2 transmission resources selected when resource selection is performed at the fourth moment except the first transmission resource; determining the first moment between the fifth moment and the sixth moment.

2. The method for determining a resource selection window according to claim 1, characterized in that, the determining the resource selection window at the first moment according to the time domain position of the reserved transmission resources at the first moment includes: determining the lowest time domain position and the highest time domain position of the reserved transmission resources at the first moment according to the time domain position of the reserved transmission resources at the first moment; determining the resource selection window at the first moment according to the lowest time domain position and the highest time domain position.

3. The method for determining a resource selection window according to claim 1, characterized in that, the determining the resource selection window at the first moment according to the time domain position of the reserved transmission resources at the first moment includes: determining a first interval parameter, where the first interval parameter is used to represent the maximum time interval between two adjacent transmission resources indicated by the sidelink control information; determining the resource selection window at the first moment according to the time domain position of the reserved transmission resources at the first moment and the first interval parameter.

4. The method for determining a resource selection window according to claim 3, characterized in that, the determining the resource selection window at the first moment according to the time domain position of the reserved transmission resources at the first moment and the first interval parameter includes: determining the lowest time domain position of the reserved transmission resources at the first moment according to the time domain position of the reserved transmission resources at the first moment; determining the lower bound of the resource selection window at the first moment according to a first duration parameter, the lowest time domain position and the first interval parameter; where the first duration parameter is related to the processing delay of the electronic device.

5. The method for determining a resource selection window according to claim 3, characterized in that, Determining the resource selection window according to the time domain position of the reserved transmission resource at the first moment and the first interval parameter includes: 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 the upper bound of the resource selection window at the first moment according to the second duration parameter, the highest time domain position, and the first interval parameter; Wherein the second duration parameter is related to the latency requirement of the service.

6. The method for determining a resource selection window according to claim 1, characterized in that Determining the resource selection window at the first moment according to the time domain position of the reserved transmission resource at the first moment includes: Determining a second interval parameter, where the second interval parameter represents the maximum time interval between transmission resources indicated by sidelink control information; Determining the 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 for determining a resource selection window according to claim 6, characterized in that Determining the 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 includes: 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 the lower bound of the resource selection window at the first moment according to the first duration parameter, the highest time domain position, and the second interval parameter; Wherein the first duration parameter is related to the processing latency of the electronic device.

8. The method for determining a resource selection window according to claim 6, characterized in that Determining the 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 includes: 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 the upper bound of the resource selection window at the first moment according to the second duration parameter, the lowest time domain position, and the second interval parameter; Wherein the second duration parameter is related to the latency requirement of the service.

9. The method for determining a resource selection window according to any one of claims 1 to 8, characterized in that further includes: When selecting resources within the resource selection window at the first moment, excluding the transmission resources on the time slot where the reserved transmission resource at the first moment is located.

10. A device for determining a resource selection window, characterized in that includes: A first moment determination module configured to determine a first moment, where the first moment is the moment for resource selection; A reserved resource acquisition module configured to acquire the reserved transmission resource at the first moment; A selection window determination module 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; Wherein, the first moment determination module includes: A second moment determination unit configured to determine a second moment, where the second moment is before the first moment, and the second moment is the moment for resource selection; A third moment determination unit, configured to determine a third moment, where the third moment is the time domain position of the first transmission resource among K1 transmission resources selected during resource selection at the second moment, and K1 is a positive integer greater than or equal to 1; A first moment determination unit, configured to determine the first moment between the second moment and the third moment; Or, The first moment determination module includes: A fourth moment determination unit, configured to determine a fourth moment, where the fourth moment is before the first moment and is the moment for resource selection; A fifth moment determination unit, configured to determine a fifth moment, where the fifth moment is the time domain position of the first transmission resource among K2 transmission resources selected during resource selection at the fourth moment, and K2 is a positive integer greater than 1; A sixth moment determination unit, configured to determine a sixth moment, where the sixth moment is the time domain positions of the other transmission resources among the K2 transmission resources selected during resource selection at the fourth moment except the first transmission resource; A first moment obtaining unit, configured to determine the first moment between the fifth moment and the sixth moment.

11. The apparatus for determining a resource selection window according to claim 10, wherein, The selection window determination module includes: A high and low time domain position determination unit, configured to determine the lowest time domain position and the highest time domain position of the reserved transmission resources at the first moment according to the time domain position of the reserved transmission resources at the first moment; A first selection window determination unit, configured to determine the resource selection window at the first moment according to the lowest time domain position and the highest time domain position.

12. The apparatus for determining a resource selection window according to claim 10, wherein, The selection window determination module includes: A first interval parameter determination unit, configured to determine a first interval parameter, where the first interval parameter is used to represent the maximum time interval between two adjacent transmission resources indicated by sidelink control information; A second selection window determination unit, configured to determine the resource selection window at the first moment according to the time domain position of the reserved transmission resources at the first moment and the first interval parameter.

13. The apparatus for determining a resource selection window according to claim 12, wherein, The second selection window determination unit includes: A first lowest time domain position determination subunit, configured to determine the lowest time domain position of the reserved transmission resources at the first moment according to the time domain position of the reserved transmission resources at the first moment; A first selection window lower bound determination subunit, configured to determine the lower bound of the resource selection window at the first moment according to a first duration parameter, the lowest time domain position, and the first interval parameter, where the first duration parameter is related to the processing delay of the electronic device.

14. The apparatus for determining a resource selection window according to claim 12, wherein, The second selection window determination unit includes: A first highest time domain position determination subunit, configured to determine the highest time domain position of the reserved transmission resources at the first moment according to the time domain position of the reserved transmission resources at the first moment; The first selection window upper bound determination subunit is configured to determine the upper bound of the resource selection window at the first moment according to the second duration parameter, the highest time domain position, and the first interval parameter; wherein the second duration parameter is related to the latency requirement of the service.

15. The apparatus for determining a resource selection window according to claim 10, wherein, the selection window determination module includes: A second interval parameter determination unit configured to determine a second interval parameter, where the second interval parameter represents the maximum time interval between transmission resources indicated by sidelink control information; A third selection window determination unit 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 and the second interval parameter.

16. The apparatus for determining a resource selection window according to claim 15, wherein, the third selection window determination unit includes: A second highest time domain position determination subunit configured to determine 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; A second selection window lower bound determination subunit configured to determine the lower bound of the resource selection window at the first moment according to the first duration parameter, the highest time domain position, and the second interval parameter; wherein the first duration parameter is related to the processing latency of the electronic device.

17. The apparatus for determining a resource selection window according to claim 15, wherein, the third selection window determination unit includes: A second lowest time domain position determination subunit configured to determine 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; A second selection window upper bound determination subunit configured to determine the upper bound of the resource selection window at the first moment according to the second duration parameter, the lowest time domain position, and the second interval parameter; wherein the second duration parameter is related to the latency requirement of the service.

18. The apparatus for determining a resource selection window according to any one of claims 10 to 17, wherein, further includes: A resource exclusion module configured to exclude the transmission resources on the time slot where the reserved transmission resource at the first moment is located when selecting resources within the resource selection window at the first moment.

19. An electronic device, wherein, includes a storage unit and a processing unit; the storage unit is used to store a program for determining a resource selection window; the processing unit is used to run the program for determining a resource selection window, and when the program for determining a resource selection window is executed, it runs the method for determining a resource selection window according to any one of claims 1 to 9.

20. A readable storage medium, wherein, stores a program for determining a resource selection window, and when the program for determining a resource selection window is executed, it runs the method for determining a resource selection window according to any one of claims 1 to 9.

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