Resource selection method, apparatus and terminal

Abstract

The application discloses a resource selection method, device and terminal, and belongs to the technical field of communication. The resource selection method comprises the following steps: a terminal acquires resource reservation information; and the terminal selects resources according to the resource reservation information.

Description

Technical Field

[0001] This application belongs to the field of communication technology, specifically relating to a resource selection method, apparatus, and terminal. Background Technology

[0002] In Long Term Evolution (LTE) sidelinks, resource reservation only supports periodic reservation, and a single transport block (TB) can only perform one initial transmission and one blind retransmission. However, in New Radio (NR) sidelinks, resource reservation supports both periodic and non-periodic reservation. This means that LTE sidelink devices and NR sidelink devices cannot share the same resource pool for resource transmission, resulting in lower system resource utilization. Summary of the Invention

[0003] This application provides a resource selection method, apparatus, and terminal that can solve the problem of low system resource utilization.

[0004] Firstly, a resource selection method is provided, including:

[0005] The terminal obtains resource reservation information;

[0006] The terminal selects resources based on the resource reservation information.

[0007] Secondly, a resource selection device is provided, comprising:

[0008] The acquisition module is used to obtain resource reservation information;

[0009] The resource selection module is used to select resources based on the resource reservation information.

[0010] Thirdly, a terminal is provided, the terminal including a processor, a memory, and a program or instructions stored in the memory and executable on the processor, wherein the program or instructions, when executed by the processor, implement the steps of the resource selection method as described in the first aspect.

[0011] Fourthly, a terminal is provided, including a processor and a communication interface, wherein the processor is used to acquire resource reservation information and select resources based on the resource reservation information.

[0012] Fifthly, a readable storage medium is provided, on which a program or instructions are stored, which, when executed by a processor, implement the steps of the resource selection method as described in the first aspect.

[0013] In a sixth aspect, a chip is provided, the chip including a processor and a communication interface coupled to the processor, the processor being used to run programs or instructions to implement the steps of the resource selection method as described in the first aspect.

[0014] In a seventh aspect, a computer program / program product is provided, the computer program / program product being stored in a non-transient storage medium, the program / program product being executed by at least one processor to implement the steps of the resource selection method as described in the first aspect.

[0015] In this embodiment, the terminal selects resources by obtaining the corresponding resource reservation information. By defining the relevant rules for resource selection of NR terminal and LTE terminal, the NR terminal and LTE terminal can coexist on the same frequency. This ensures that the NR terminal can communicate normally on the coexisting frequency band, while not affecting the overall performance of the LTE terminal, thereby improving the communication efficiency of the side link communication system. Attached Figure Description

[0016] Figure 1a This is a block diagram of an LTE sidelink communication system applicable to embodiments of this application;

[0017] Figure 1b This is one of the data transmission diagrams in an LTE sidelink communication system to which this application embodiment can be applied;

[0018] Figure 1c This is a second schematic diagram of data transmission in an LTE sidelink communication system applicable to the embodiments of this application;

[0019] Figure 1d This is a schematic diagram of a terminal performing resource detection in an LTE sidelink communication system to which this application embodiment can be applied;

[0020] Figure 2 This is a flowchart of a resource selection method provided in an embodiment of this application;

[0021] Figure 3a This is one of the resource selection diagrams of the second resource reservation method involved in the embodiments of this application;

[0022] Figure 3b This is the second schematic diagram of resource selection for the second resource reservation method involved in the embodiments of this application;

[0023] Figure 3c This is the third schematic diagram of resource selection for the second resource reservation method involved in the embodiments of this application;

[0024] Figure 4 This is a structural diagram of a resource selection device provided in an embodiment of this application;

[0025] Figure 5 This is a structural diagram of a communication device provided in an embodiment of this application;

[0026] Figure 6 This is a structural diagram of a terminal provided in an embodiment of this application. Detailed Implementation

[0027] The technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application are within the scope of protection of this application.

[0028] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such terms can be used interchangeably where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first" and "second" are generally of the same class, not limited in number; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0029] It is worth noting that the technologies described in this application are not limited to Long Term Evolution (LTE) / LTE-Advanced (LTE-A) systems and New Radio (NR) systems, but can also be used in other wireless communication systems, such as Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Orthogonal Frequency Division Multiple Access (OFDMA), Single-carrier Frequency-Division Multiple Access (SC-FDMA), and other systems. The terms "system" and "network" in this application are often used interchangeably, and the described technologies can be used with the systems and radio technologies mentioned above, as well as with other systems and radio technologies. The following description describes New Radio (NR) systems for illustrative purposes, and the term NR is used in most of the following description; however, these technologies can also be applied to applications other than NR systems, such as 6th generation (6G) wireless communication systems. th Generation 6G communication system.

[0030] Currently, LTE systems support sidelink transmission, meaning that data transmission between user equipment (UEs) occurs directly at the physical layer. 5G NR (New Radio) systems will support more advanced sidelink transmission designs, such as unicast, multicast, or groupcast, thus enabling support for a wider range of service types.

[0031] Figure 1aThis diagram illustrates a block diagram of an LTE sidelink communication system applicable to embodiments of this application. The communication system includes a terminal 11 and a network-side device 12. In this context, terminal 11 can also be referred to as a terminal device or user terminal. Terminal 11 can be a mobile phone, tablet computer, laptop computer, personal digital assistant (PDA), handheld computer, netbook, ultra-mobile personal computer (UMPC), mobile internet device (MID), augmented reality (AR) / virtual reality (VR) device, robot, wearable device, vehicle-mounted device (VUE), pedestrian terminal (PUE), smart home (home devices with wireless communication functions, such as refrigerators, televisions, washing machines, or furniture), etc. Wearable devices include: smartwatches, smart bracelets, smart headphones, smart glasses, smart jewelry (smart bracelets, smart chains, smart rings, smart necklaces, smart anklets, smart anklets, etc.), smart wristbands, smart clothing, game consoles, etc. It should be noted that the specific type of terminal 11 is not limited in this embodiment. Network-side device 12 can be a base station or a core network. The base station can be referred to as a node B, evolved node B, access point, base transceiver station (BTS), radio base station, radio transceiver, basic service set (BSS), extended service set (ESS), B node, evolved B node (eNB), home B node, home evolved B node, WLAN access point, WiFi node, transmitting and receiving point (TRP), or any other suitable term in the field, as long as the same technical effect is achieved. The base station is not limited to specific technical terms. It should be noted that in this embodiment of the application, only the base station in the NR system is used as an example, but the specific type of base station is not limited.

[0032] To better understand the technical solutions provided in the embodiments of this application, the relevant concepts that may be involved in the embodiments of this application are explained below.

[0033] The Physical Sidelink Control Channel (PSCCH) and the Physical Sidelink Shared Channel (PSSCH) of LTE Sidelink are transmitted in the same subframe. For ease of description, the PSCCH of LTE Sidelink can also be called LTE SCI format 1. The frequency domains of LTE SCI format 1 and PSSCH can be continuous or non-contiguous, with two selection modes.

[0034] Option 1: As shown Figure 1b As shown, LTE SCI format 1 (SA in the figure) starts mapping from the lowest frequency domain position in the lowest subchannel of the resource selected for data transmission, occupying two Physical Resource Blocks (PRBs).

[0035] Option 2: As shown Figure 1c As shown, LTE SCI format 1 (SA in the figure) starts mapping from the frequency domain position in the SA resource pool corresponding to the lowest subchannel of the resource selected for data transmission, occupying two PRBs.

[0036] The LTE SCI format 1 includes the following indication fields:

[0037]

[0038] For NR Sidelink communication systems, SCI format 1-A in NR Sidelink can be written as 1. st SCI, of which, 1 st SCI consists of the following indicator fields:

[0039]

[0040] NR Sidelink resource allocation:

[0041] NR (Vehicle-to-Everything) defines two resource allocation modes: Mode 1, where resources are allocated by the base station; and Mode 2, where the UE decides which resources to use for transmission. Resource information may come from base station broadcast messages or pre-configured information. If the UE is within range of the base station and has a Radio Resource Control (RRC) connection, it can operate in either Mode 1 or Mode 2. If the UE is within range of the base station but does not have an RRC connection, it can only operate in Mode 2. If the UE is outside range of the base station, it can only operate in Mode 2, performing V2X transmission based on pre-configured information.

[0042] For mode 2, the specific operation is as follows: 1) After resource selection is triggered, the transmitting terminal first determines the resource selection window. The lower boundary of the resource selection window is at time T1 after the resource selection is triggered, and the upper boundary is at time T2 after the trigger. T2 is the value selected by the UE within its packet delay budget (PDB) for TB transmission. T2 is no earlier than T1; 2) Before resource selection, the UE needs to determine the candidate resource set. The reference signal received power (RSRP) measured on the resources within the resource selection window is compared with the corresponding RSRP threshold. If the RSRP is lower than the RSRP threshold, then the resource can be included in the candidate resource set; 3) After the candidate resource set is determined, the UE randomly selects a transmission resource from the candidate resource set. In addition, the UE can reserve transmission resources for subsequent transmissions during this transmission.

[0043] Resource selection for pedestrian UEs (PUEs) in LTE:

[0044] In LTE, partial detection is primarily designed for power saving and to support P2V communication. The Power Usage Component (PUE) supports two resource selection modes: random resource selection and a semi-static resource reservation method that performs partial detection first and then selects resources based on the results. The PUE's choice of mode is configured by the Resource Control Controller (RRC). When the RRC is configured to support both resource selection modes, the PUE implementation determines which method to use.

[0045] Specifically, please refer to the method for the terminal to perform partial detection and resource detection. Figure 1d ,like Figure 1dAs shown, the PUE detection windows are windows a and b within the range [n-1000, n]. Detection windows a and b use the selected window c as a position reference, with a step size of 100, and the detectable position is 100*k points forward. The position and length Y of the selected window c (the minimum value of Y is a parameter configured by RRC) are determined by the terminal implementation, and k is a parameter configured by RRC, with a value range of up to 10. A bitmap indicates the position of window a. The terminal detects SCIs sent by other terminals within detection windows a and b. Based on the detected SCIs and the reservation period, it infers the resource reservation status of other terminals within window c. The UE can use this information to exclude resources that do not meet the conditions in the selected window. From the remaining resources, at least 20% (20% of the window length Y) of the resources are selected as a candidate resource set and reported to the MAC layer. The MAC layer randomly selects a resource from the candidate resource set as a candidate resource for the UE. The UE performs periodic reservation of the selected resource, and the reservation period is indicated in the SCI.

[0046] Periodic configuration:

[0047] In NR V2X, if a resource pool supports periodic configuration, the configurable periodic values ​​for that resource pool are 0, [1:99], 100, 200, 300, 400, 500, 600, 700, 800, 900, and 1000ms. RRC can configure up to 16 values ​​from the selectable periodic values, including a periodic configuration of 0ms.

[0048] In LTE V2X, the selectable period values ​​are 20, 50, 100, 200, 300, 400, 500, 600, 700, 800, 900, and 1000ms.

[0049] Re-evaluation of NR Sidelink resource selection:

[0050] In Mode 2 resource allocation mode, a re-evaluation mechanism for resource selection is supported. A brief description of this mechanism is as follows: To determine whether a selected but unreserved resource (PSCCH / PSSCH resource) is still not idle or in a low-interference state, the UE performs a resource selection re-evaluation at least from time 'm-T3'. Time 'm' is the moment the reservation information for that resource is first sent, and T3 includes at least the duration of the UE's resource selection process. The UE re-executes the resource selection step at least from time 'm-T3' to obtain a set of candidate resources. If the resource selected by the UE is still in the candidate resource set, the UE does not need to perform resource re-selection; otherwise, the UE selects a new transmission resource from the candidate set.

[0051] NR Sidelink resource pre-emption:

[0052] In Mode 2 resource allocation, a resource preemption mechanism is supported. A brief description of this mechanism is as follows: If a UE's reserved resources overlap (partially overlap) with resources reserved / selected by other UEs with higher priority services, and the UE's SL-RSRP measurement value on the relevant resources exceeds a certain associated SL-RSRP threshold, the UE will trigger resource reselection. To determine whether reserved resources (PSCCH / PSSCH resources) have been preempted, the UE performs preemption detection at least from time 'm-T3', where 'm' is the time the resource is currently in use or the time the reservation information for that resource is sent, and T3 includes at least the time the UE performs resource selection processing. The UE re-executes the resource selection step at least from 'm-T3' to obtain a set of candidate resources. If the resource selected by the UE is still in the candidate resource set, the UE does not need to perform resource reselection; otherwise, the UE selects a new transmission resource from the candidate set.

[0053] The resource selection method, apparatus, and related equipment provided in this application will be described in detail below with reference to the accompanying drawings and through some embodiments and application scenarios.

[0054] Please refer to Figure 2 , Figure 2 This is a flowchart illustrating a resource selection method provided in an embodiment of this application. For example... Figure 2 As shown, the method includes the following steps:

[0055] Step 201: The terminal obtains resource reservation information.

[0056] The resource reservation information includes at least one of the following: the priority of the data packet, the period value of the first resource reservation method, the time domain resources of the second resource reservation method, the frequency domain resources of the second resource reservation method, the time domain resources of the first transmission method, the time domain resources of different Hybrid Automatic Repeat Request (HARQ) processes corresponding to the same Transport Block (TB), and the frequency domain resources of different HARQ processes corresponding to the same TB.

[0057] It should be noted that the first resource reservation method can also be called the periodic reservation method, and the second resource reservation method can be called the non-periodic reservation method. The non-periodic reservation can be the reservation of resources for retransmission. The first transmission method can also be called the blind retransmission indication. The blind retransmission can be the retransmission transmission when HARQ is not enabled. In some embodiments, the blind retransmission indication can be the retransmission resource indicated by the time gap between initial transmission and retransmission in the first control information.

[0058] Optionally, obtaining resource reservation information includes at least one of the following:

[0059] Resource reservation information is obtained from the resource reservation indication field of the first control information, wherein the first control information is the control information of the first type of terminal;

[0060] Resource reservation information is obtained from the resource reservation indication field of the second control information, where the second control information is the control information of the first type of terminal.

[0061] Resource reservation information is obtained from the resource reservation indication field of the third control information, wherein the third control information is the control information of the second type of terminal;

[0062] When the second resource reservation mode and / or resource selection mode of the terminal is the first preset mode, the resource reservation information is obtained from the HARQ association indication information in the first control information, or the resource reservation information is obtained from the HARQ association indication information in the second control information;

[0063] When the second resource reservation mode and / or resource selection mode of the terminal is the second preset mode, resource reservation information is obtained from the resource reservation indication field in the second control information;

[0064] When the terminal adopts the first transmission mode and the second resource reservation mode, the resource reservation information is obtained from the resource reservation indication field of the second control information and the indication field of the time interval between the initial transmission and retransmission in the first control information.

[0065] To better understand the technical solution of this application, in this application, the first type of terminal refers to an NR terminal, the second type of terminal refers to an LTE terminal, the first control information and the second control information are two different types of control information for an NR terminal, and the third control information is the control information for an LTE terminal. Of course, in some other embodiments, the first type of terminal may also refer to an LTE terminal, and the second type of terminal may refer to an NR terminal.

[0066] In this embodiment, the first control information sent by the NR terminal is only used for resource selection by the LTE terminal, while the second control information sent by the NR terminal can be used for resource selection by both the NR terminal and the LTE terminal. It should be noted that the first control information is essentially a sidelink control information (SCI), but it differs from existing SCIs. To avoid confusion with existing SCIs, the following description uses the term SA. The first control channel is essentially a physical sidelink control channel (PSCCH), but it differs from existing PSCCHs. To avoid confusion with existing PSCCHs, the following description uses the term PSCCH_SA.

[0067] Optionally, the first control information can adopt a first information format, which is a control information format under a different communication system than the communication system corresponding to the terminal, so that terminals under other communication systems can successfully decode the first control information. For example, taking an NR terminal as an example, the first control information sent by the NR terminal can adopt SCI format 1 in LTE sidelink, so that the LTE terminal can successfully decode the first control information sent by the NR terminal and obtain the resource reservation information indicated by the first control information for resource selection. This does not affect the performance of the LTE terminal within the system, allowing the LTE terminal and the NR terminal to share the same resource pool for resource transmission, thereby improving the utilization rate of system resources.

[0068] The second control information can be understood as enhanced information of the first control information. Taking an NR terminal as an example, in addition to sending the first control information, the NR terminal can also send the second control information. The first control information is mainly used by LTE terminals to read the resource reservation information of the NR terminal for resource selection, while the second control information is mainly used by other NR terminals to read the resource reservation information of the NR terminal for resource selection, data reception, HARQ feedback, etc.

[0069] The second control information is essentially the sidelink control information (SCI), but it differs from existing SCIs. The first control channel is essentially the physical sidelink control channel (PSCCH), but it differs from existing PSCCHs.

[0070] The first control information may include at least one of the following:

[0071] i) First indication information field. The first indication information field is mainly used to distinguish terminals and / or indicate specific information about terminals (such as NR UE).

[0072] ii) Priority indication field; for example, used to indicate the priority of the currently transmitted data.

[0073] iii) Resource reservation indication field; for example, a periodic value used to indicate periodic reservation.

[0074] iv) Frequency domain location indication field; for example, used to indicate the frequency domain location of primary and retransmission resources.

[0075] v) Primary and retransmission interval indication field; for example, time domain offset used to indicate the time domain position of primary and retransmission resources.

[0076] ⅵ) Modulation and Coding Scheme (MCS) indicator field; for example, used to indicate the MCS level.

[0077] vii) Retransmission indication field; for example, used to indicate whether retransmission is allowed.

[0078] ⅷ) Transmission format indication field; for example, used to indicate whether the transmission format uses rate matching, transport block size (TBS) scaling, or puncturing and no TBS-scaling, etc.

[0079] ⅸ) Hybrid Automatic Repeat reQuest (HARQ) related information indication field; for example, used to indicate that reserved resources in multiple HARQ processes belong to the same Transport Block (TB), or SL process, MAC PDU (Protocol Data Unit), etc.

[0080] x) Format indication field for second control information; for example, used to indicate the format of different second / third control information.

[0081] xi) Physical Sidelink Feedback Channel (PSFCH) overhead indication field; for example, used to indicate PSFCH overhead related information.

[0082] xii) Beta_offset indicator field; for example, used to indicate relevant information for determining the second / third control information carried on the first shared channel (such as PSSCH_SA), such as mapping method, number of modulation symbols, etc.

[0083] The second control information may include at least one of the following:

[0084] i) Priority indication field; for example, used to indicate the priority of the data currently being sent.

[0085] ii) Frequency domain location indication field; for example, used to indicate the frequency domain location of reserved resources.

[0086] iii) Time-domain location indication field; for example, used to indicate the relative time-domain location of reserved resources.

[0087] iv) Reserved period indicator field; for example, a period value reserved for the period.

[0088] v) Demodulation Reference Signal (DMRS) pattern indication field; for example, which pattern is used for DMRS.

[0089] ⅵ) The format indicator field for the second control information; for example, used to indicate the format of the next possible SCI, i.e., the second control information.

[0090] ⅶ) Beta_offset indicator field; for example, used to indicate relevant information for determining the control information carried on the first shared channel, such as intermediate quantities for calculating the number of modulation symbols.

[0091] ⅷ) DMRS port number indication field; for example, used to indicate the number of ports.

[0092] ⅸ) Modulation and Coding Scheme (MCS) indicator field; for example, used to indicate the MCS level.

[0093] x) Additional MCS indication field; for example, for additional MCS indication.

[0094] xi) Physical Sidelink Feedback Channel (PSFCH) overhead indication field; for example, used to indicate PSFCH overhead related information.

[0095] xii) Hybrid Automatic Repeat reQuest (HARQ) process count indicator field; for example, used to indicate the number of HARQ processes.

[0096] xiii) New data indicator field.

[0097] xiv) Redundancy version indicator field.

[0098] xv) Source Identifier ID field; for example, used to indicate the ID of the sending UE.

[0099] xvi) Destination ID indication field; for example, used to indicate the ID of the receiving UE.

[0100] xvⅱ) HARQ feedback switch indication field; for example, used to indicate whether HARQ feedback is allowed.

[0101] xviⅱ) Propagation type indicator field; for example, used to indicate whether the current transmission is unicast, multicast or broadcast.

[0102] xix) Channel State Information (CSI) request indication field; for example, used to trigger a CSI report.

[0103] xx) Area ID indicator field; for example, used to indicate the area ID.

[0104] xxi) Communication range indication field; for example, the area used to indicate a NACK response.

[0105] xxii) HARQ process association indication field; for example, used to indicate that reserved resources in multiple HARQ processes belong to the same transport block (TB), or SL process, MAC PDU (protocol data unit), etc.

[0106] The third control information may be the LTE SCI format 1 mentioned above, and its specific information content can be referred to the previous description, which will not be repeated here.

[0107] Optionally, the terminal may obtain resource reservation information from the resource reservation indication field of the different control information mentioned above. For example, the terminal is an NR terminal, which may obtain resource reservation information from the resource reservation indication field of the third control information. It can be understood that since the NR terminal introduces the transmission and reception of the first control information, the NR terminal can detect the resource reservation of the LTE terminal through the third control information sent by the LTE terminal. Therefore, when selecting resources, the NR terminal can avoid the resources reserved by the LTE terminal to achieve the purpose of co-frequency coexistence.

[0108] For example, when an NR terminal receives control information in time slot t and determines that the terminal corresponding to the control information is an LTE terminal based on the control information format or relevant information, the control information is the aforementioned third control information. For example, if the third control information is LTE SCI format 1 information, the NR terminal obtains the periodic reservation value from the Resource reservation indication field 'Resourcereservation' in the SCI format 1 information. If the NR terminal determines that the terminal corresponding to the received control information is an NR terminal based on the control information format or relevant information, the NR terminal may obtain the periodic reservation value from the periodic reservation indication field of the second control information according to protocol predefined or network preconfiguration or network configuration, or obtain the periodic reservation value from the Resource reservation indication field of the first control information.

[0109] Alternatively, when an NR terminal receives control information in time slot t, and determines that the terminal corresponding to the control information is an LTE terminal based on the control information format or relevant information, the NR terminal determines whether a retransmission is possible based on the retransmission index indication field. If a retransmission is possible, the NR terminal obtains resource reservation information based on the time interval indication field between the initial transmission and the retransmission. If the terminal corresponding to the control information is an NR terminal based on the control information format or relevant information, and if the NR terminal has disabled the non-periodic reservation method in protocol R16 / R17, it can use the blind retransmission indication field in the first control information to indicate a retransmission. The NR terminal can obtain the non-periodic reservation information from the time interval indication field between the initial transmission and the retransmission of the first control information according to the protocol predefined or network preconfiguration or network configuration.

[0110] In some embodiments, if the terminal adopts a first transmission mode (also known as a blind retransmission mode) and a second resource reservation mode (also known as an aperiodic reservation mode), the terminal may obtain resource reservation information from the resource reservation indication field in the second control information sent by the NR terminal and the time gap between initial transmission and retransmission indication field in the first control information.

[0111] Alternatively, in some embodiments, if the terminal's second resource reservation method (also known as a non-periodic reservation method) and / or resource selection method is the first preset method, the terminal may obtain resource reservation information through HARQ association indication information in the first control information or the second control information; if the terminal's second resource reservation method and / or resource selection method is the second preset method, the terminal may obtain resource reservation information from the resource reservation indication field in the second control information. For example, under the second preset method, the terminal may reuse the non-periodic reservation method of NR in protocol R16 or R17, and avoid LTE resources through resource selection and re-evaluation or resource preemption by the NR terminal.

[0112] Optionally, the first preset method is determined by at least one of the following: protocol predefinition, preconfiguration, configuration, indication; and / or, the second preset method is determined by at least one of the following: protocol predefinition, preconfiguration, configuration, indication.

[0113] The pre-configuration can be pre-configured by the base station or the terminal, and the configuration can be configured by the base station or the terminal. The indication information can be indication information sent by the base station or the terminal. Optionally, the first preset method is to determine the reserved resources of the second resource reservation method (non-periodic reservation) by associating HARQ with indication information, and the second preset method is to directly indicate the reserved resources of the second resource reservation method through the time domain resource indication field and the frequency domain resource indication field.

[0114] In this embodiment of the application, under the first preset method, the terminal satisfies at least one of the following:

[0115] The TB transmitted by the terminal is associated with N HARQ processes, where N is a positive integer;

[0116] The time interval between the reserved resources in the second resource reservation method and the resources transmitted in the first transmission method is the data processing time of the terminal or the transmission processing time of the Physical Sidelink Feedback Channel (PSFCH).

[0117] When the terminal is the second type of terminal, resource reservation information is determined and resource exclusion is performed by detecting the first control information of each HARQ of the second type of terminal and the first type of terminal.

[0118] For example, when the protocol predefines the resource selection method of the NR terminal as the first preset method, the TB transmitted by the NR terminal is associated with N HARQ processes to utilize multiple different HARQ processes to achieve non-periodic resource reservation. The value of N is determined by any one of the following: protocol predefinement, pre-configuration, configuration, Radio Resource Control (RRC) indication, Medium Access Control Control Element (MAC CE) indication, Downlink Control Information (DCI) indication, Sidelink Control Information (SCI) indication; and / or, the value of N is related to at least one of the following: Channel Occupancy Ratio (CR), Channel Busy Ratio (CBR), Maximum Retransmission Count, Conversion Type, Number of Receiving Terminals, Maximum Number of HARQ Processes.

[0119] It should be noted that, in some embodiments, under the first preset mode, the TB associated with N HARQ processes can also be replaced with at least one of the following: HARQ process, side link SL process, and Medium Access Control Protocol Data Unit (MAC PDU).

[0120] Alternatively, in the first preset mode, the blind retransmission resources indicated by the NR terminal are used to transmit the PSFCH. The blind retransmission indication (i.e., the first transmission mode) allows the LTE terminal to avoid these resources. At this time, the time interval between the reserved resources of the non-periodic reservation mode (i.e., the second resource reservation mode) and the blind retransmission resources meets certain time conditions. For example, the time interval can be the terminal's data processing time or the PSFCH transmission processing time.

[0121] Alternatively, if the terminal is an LTE terminal, then under the first preset mode, the LTE terminal determines the resource reservation information by detecting the first control information of each HARQ process of the LTE terminal and the NR terminal, and performs resource exclusion, thereby avoiding the resource reservation information of the NR terminal.

[0122] Optionally, if the terminal satisfies the requirement that its transmission involves N HARQ processes associated with TB, the terminal also satisfies at least one of the following:

[0123] Select M×N candidate resources, where M is 1 or 2;

[0124] Send association indication information, which is used to indicate that the reserved resources of Q HARQ processes are the same TB of reserved resources, where Q is a positive integer less than or equal to N.

[0125] The terminal may send association indication information to the NR receiving terminal, and the association indication information indicates that the preview resources of Q out of N HARQ processes are the same TB of preview resources.

[0126] Optionally, the association indication information is implemented through any of the following:

[0127] In the reserved bits of the first control information, a HARQ process association indication field is sent to indicate at least one of the time domain resources and frequency domain resources of the Q HARQ process reserved resources;

[0128] The second control information sends a HARQ process association indication field, indicating at least one of the time domain resources and frequency domain resources reserved by the Q HARQ processes;

[0129] When the second control information is in the first information format, the time domain resource indication field in the second control information indicates the time domain resources reserved by two or three HARQ processes, and / or, the frequency domain resource indication field in the second control information indicates the frequency domain resources reserved by two or three HARQ processes.

[0130] For example, an NR terminal can send a HARQ process association indication field in the reserved bits of the first control information to indicate at least one of the time-domain and frequency-domain resources of the reserved resources for the Q HARQ processes. In this case, for an LTE terminal, the reserved resources of multiple HARQ processes are multiple periodic reserved resources, which can be excluded according to relevant procedures. For an NR terminal, non-periodic reserved resources of the NR terminal can be excluded by decoding the HARQ process association indication field in the first control information. In this case, the value of Q is related to at least one of the following: the number of remaining reserved bits in the first control information, channel occupancy rate, channel busy rate, maximum retransmission count, conversion type, number of receiving terminals, and maximum number of HARQ processes.

[0131] Alternatively, the NR terminal may send a HARQ process association indication field in the second control information to indicate at least one of the time-domain and frequency-domain resources reserved for the Q HARQ processes. In this case, for the LTE terminal, the reserved resources for multiple HARQ processes are multiple periodic reserved resources, which can be excluded according to relevant procedures. For the NR terminal, periodic reserved resources can be obtained by decoding the first or second control information, and non-periodic reserved resources of the NR terminal can be excluded by decoding the HARQ process association indication field of the first control information. In this case, the value of Q is related to at least one of the following: the number of bits in the second control information, the number of free bits in the second control information, the channel occupancy rate, the channel busy rate, the maximum number of retransmissions, the conversion type, the number of receiving terminals, and the maximum number of HARQ processes.

[0132] Alternatively, the second control information sent by the NR terminal may be in the first information format, which may be a reused SCI format 1-A indicator field. The time resource assignment field in the second control information indicates the time domain resources reserved by two or three HARQ processes, and / or the frequency resource assignment field in the second control information indicates the frequency domain resources reserved by two or three HARQ processes.

[0133] In this embodiment of the application, under the second preset method, the terminal satisfies at least one of the following:

[0134] The time-domain and frequency-domain resources of the first reserved resource are determined by the time-domain and frequency-domain reservation indication fields of the second control information;

[0135] The time interval between the reserved resources in the second resource reservation method and the resources transmitted in the first transmission method is the data processing time of the terminal or the PSFCH transmission processing time.

[0136] For example, if the terminal is an NR terminal, and the protocol predefines the resource selection method of the NR terminal as the second preset method, the NR terminal can determine the time domain resources and frequency domain resources of the first reserved resources through the time domain reservation indication field and the frequency domain reservation indication field of the second control information. For example, it can determine the time domain location and size of the first reserved resources, as well as the frequency domain location and size. In this case, the NR terminal can re-evaluate the preemption through resource selection to avoid the reserved resources of LTE.

[0137] Alternatively, if the protocol predefines the resource selection method of the NR terminal as the second preset method, the resources of the indicated first transmission method (blind retransmission) are used to transmit PSFCH. The first transmission method is used to allow the LTE terminal to avoid these resources. The time interval between the reserved resources of the second resource reservation method (non-periodic reservation method) of the NR terminal and the resources of the first transmission method meets certain conditions, such as the data processing time or PSFCH transmission processing time of the NR terminal.

[0138] In this embodiment of the application, when the terminal is a second type of terminal (LTE terminal), obtaining resource reservation information includes at least one of the following:

[0139] Periodic reservation information is obtained from the resource reservation indication field of the first control information, wherein the first control information is the control information of the first type of terminal;

[0140] The reserved information for the first transmission mode is obtained from the time interval indication field between the initial transmission and the retransmission.

[0141] For example, the LTE terminal obtains periodic reservation information from the resource reservation indication field of the first control information sent by the NR terminal; or, the LTE terminal obtains the first transmission mode (which can also be called periodic reservation mode) reservation information from the time interval indication field between the initial transmission and retransmission; of course, the LTE terminal may also obtain periodic reservation information from the resource reservation indication field of the first control information, and obtain the reservation information of the first transmission mode from the time interval indication field between the initial transmission and retransmission.

[0142] Step 202: The terminal selects resources based on the resource reservation information.

[0143] In this embodiment, after obtaining resource reservation information, the terminal selects resources based on the resource reservation information. For example, if the resource reservation information includes a period value for a first resource reservation method (periodic reservation method), the terminal can obtain resources at a specific time based on this period value. Alternatively, if the resource reservation information includes time-domain and frequency-domain resources reserved for a second resource reservation method (non-periodic reservation method), the terminal can select time-domain and frequency-domain resources based on this resource reservation information. Optionally, the content included in the resource reservation information can also be other possible cases, which are not listed here.

[0144] It should be noted that the terminal's resource selection may include at least one of the following: determining a resource detection period (also known as a resource detection window), determining a resource selection period (also known as a resource selection window), determining an RSRP threshold, resource detection, resource exclusion, resource reselection, etc.

[0145] Optionally, the resource selection includes at least one of the following:

[0146] Based on the resource reservation information, resources that meet the preset conditions are excluded from the resource candidate set;

[0147] Set the preset RSRP threshold for the first type of terminal to be different from the preset RSRP threshold for the second type of terminal.

[0148] Change the priority of data transmission from the second type of terminal;

[0149] Change the RSRP associated with the second type of terminal obtained from the measurement.

[0150] Specifically, in one implementation, the terminal can exclude resources that meet preset conditions from the resource candidate set based on the acquired resource reservation information. For example, the excluded resources may be resources that overlap with resources in the resource candidate set and whose measured RSRP is greater than a preset RSRP threshold. Alternatively, the excluded resources may be reserved resources that partially overlap with reserved resources in the resource candidate set and whose measured RSRP is greater than a preset RSRP threshold. Or, the excluded resources may be resources that overlap or partially overlap with reserved resources in the resource candidate set. In this case, no RSRP judgment is performed. In some scenarios, in conjunction with the corresponding re-evaluation / preemption detection, the NR terminal can directly avoid the role of the LTE terminal, enabling the NR terminal to coexist with LTE on the same frequency without any other enhancements. Of course, the excluded resources may also be other possible situations, please refer to the following description, which will not be listed here.

[0151] In another implementation, the preset RSRP threshold for the first type of terminal (NR terminal) can be set differently from the preset RSRP threshold for the second type of terminal (LTE terminal). Consequently, the comparison results between the measured RSRP and the preset RSRP thresholds for the first and second types of terminals will differ, and therefore the resources excluded from the resource candidate set may also differ. It should be noted that setting different preset RSRP thresholds also includes the possibility of canceling the step of comparing with the preset RSRP threshold.

[0152] Alternatively, in another implementation, the priority of the second type of terminal sending data or reserving resources can be changed. Since the preset RSRP threshold is related to the priority, changing the priority means that when comparing the measured RSRP with the preset RSRP threshold to determine whether to exclude the reserved resources of the second type of terminal, the resource exclusion condition may be met only when the measured RSRP value is larger or smaller, thus different from the original result.

[0153] Alternatively, the method for calculating the RSRP associated with the second type of terminal can be changed, which will result in a different comparison between the measured RSRP and the preset RSRP threshold, and thus the resources excluded from the resource candidate set may also be different.

[0154] It should be noted that the terminal's resource selection may include at least one of the above. For example, the terminal may also change the priority of the data sent by the second type of terminal and change the RSRP associated with the measured second type of terminal to perform resource selection; or, the terminal's resource selection may also be implemented in other possible ways, which will not be listed one by one in this application.

[0155] Optionally, when the terminal excludes resources that meet preset conditions from the resource candidate set based on resource reservation information, the preset conditions include at least one of the following:

[0156] The resource where the resource reservation information is located at least partially overlaps with the resources and / or reserved resources in the resource candidate set, and the measured RSRP is greater than the preset RSRP threshold.

[0157] The reserved resources indicated by the resource reservation information at least partially overlap with the resources and / or reserved resources in the resource candidate set, and the measured RSRP is greater than a preset RSRP threshold.

[0158] The resource reservation information is located in a resource that at least partially overlaps with the resources and / or reserved resources in the resource candidate set;

[0159] The reserved resources indicated by the resource reservation information at least partially overlap with the resources and / or reserved resources in the resource candidate set.

[0160] For example, if the preset condition is that the resource in the resource reservation information partially overlaps with resources in the resource candidate set, then the terminal can exclude resources in the resource reservation information that partially overlap with resources in the resource candidate set. Alternatively, if the preset condition is that the reserved resource indicated by the resource reservation information overlaps with resources in the resource candidate set and other reserved resources, then the terminal can exclude resources in the reserved resource indicated by the resource reservation information that overlap with resources in the resource candidate set and other reserved resources. Of course, the preset condition can also be other possible forms as described above, which are not listed here. In this embodiment, the terminal can exclude resources that meet the preset condition from the resource candidate set based on the resource reservation information to achieve resource selection.

[0161] In this embodiment of the application, the terminal's resource selection may further include:

[0162] The terminal sorts the resources in the resource candidate set after resource exclusion based on the Received Signal Strength Indication (RSSI) measurement results.

[0163] For example, the terminal can exclude resources that meet preset conditions from the resource candidate set based on resource reservation information, thereby performing resource exclusion on the resource candidate set. The specific implementation of resource exclusion can be referred to the foregoing description, and will not be repeated here. In the embodiments of this application, the terminal can sort the resources after resource exclusion in the resource candidate set based on RSSI measurement results, and then perform resource selection to achieve co-frequency coexistence of NR terminal and LTE terminal resources.

[0164] Optionally, the terminal's resource selection may also include:

[0165] Initialize the resource candidate set.

[0166] Understandably, the terminal initializes the resource candidate set to achieve resource selection.

[0167] The initialization of the resource candidate set shall yield at least one of the following:

[0168] At least some of the candidate resources in the resource selection window;

[0169] The resource selection window contains at least a portion of the candidate resources after removing unmonitored resources and the reserved resources of the unmonitored resources;

[0170] Empty set.

[0171] For example, the terminal initializes the resource candidate set to a portion or all of the candidate resources within the resource selection window; or, the terminal initializes the resource candidate set to a portion or all of the candidate resources within the resource selection window after removing unmonitored resources and the reserved resources of the unmonitored resources; or, the terminal initializes the resource candidate set to an empty set.

[0172] In this embodiment of the application, the terminal's resource selection may further include:

[0173] Obtain the measured RSRP.

[0174] Understandably, by acquiring the measured RSRP, the terminal can determine the power level or strength of the signal it receives or transmits, and make resource selection based on the measured RSRP.

[0175] Optionally, acquiring the measured RSRP includes:

[0176] The measured RSRP is obtained based on the demodulation reference signal (DMRS) mode.

[0177] The RSRP measured based on DMRS mode includes at least one of the following:

[0178] The DMRS mode is determined based on the first information, and the measured RSRP is obtained based on the DMRS mode;

[0179] The measured RSRP is obtained based on the DMRS transmitted on the target antenna port, which is the antenna port indicated by the first control information.

[0180] Optionally, the first information includes at least one of the following: control information format, resource where the control information is located, type of received signal, type information of the terminal, relevant indication field of the DMRS mode, version information of the DMRS mode, and resource allocation method of the DMRS mode. The control information is at least one of the first, second, and third control information described above.

[0181] For example, the first information may be the resource where the first control information is located, thus enabling the terminal to determine the DMRS mode based on the resource where the first control information is located, and to obtain the measured RSRP based on the DMRS mode; or, for example, the first information may be DMRS mode version information, which also enables the determination of the DMRS mode, and the terminal to obtain the measured RSRP based on the DMRS mode. Of course, the first information may also be in other possible forms, which will not be listed in this application.

[0182] Optionally, the terminal may also obtain the measured RSRP based on the DMRS transmitted on the target antenna port, which is indicated by the first control information.

[0183] It should be noted that when the terminal is a type 2 terminal (i.e., an LTE terminal), the measured RSRP value can be the average or weighted average of the values ​​measured on the Physical Sidelink Control Channel (PSCCH) and the Physical Sidelink Shared Channel (PSSCH).

[0184] In this embodiment of the application, when the terminal is selecting resources, the resource detection time period of the terminal is located within... Within the range; where n is the time that triggers resource selection, and T0 is a variable related to the time length of the detection window indicated by the higher-level authority. Parameters that are predefined for the protocol or preconfigured or configured for the network.

[0185] Optionally, for the first type of terminal, namely the NR terminal, its reserved period set can be [20, 50, 100, 200, ... 1000] ms, wherein the reserved period set is determined by at least one of the following: protocol predefinition, preconfiguration, or configuration. By configuring the reserved period set of the NR terminal to be the same as that of the LTE terminal, the NR terminal will not reserve resources for other periods, thereby preventing the NR terminal from indicating reserved periods that the LTE terminal has not configured, and avoiding the LTE terminal from being unable to correctly understand the NR terminal's resource reservation.

[0186] In this embodiment, the number of transmission resources is provided through authorization via any one of DCI indication, SCI indication, higher-layer indication, and configuration authorization, and the maximum number of transmission resources is two. In this case, if the terminal is an NR terminal, the NR terminal indicates reserved resources through the first control information, and the maximum number of transmission resources indicated is two. This configuration ensures that the LTE terminal will not fail to correctly obtain the NR terminal's resources because the NR terminal indicates three reserved resources, or that the NR terminal will not fail to correctly set the resource reservation information in the first control information or experience misconfiguration because any one of DCI indication, SCI indication, higher-layer indication, or configuration authorization indicates three resources when indicating resource reservation using the first control information.

[0187] Optionally, the maximum time interval of the transmission resources is 15 time units; wherein, when the terminal is an LTE terminal, the time unit is a subframe, and when the terminal is an NR terminal, the time unit is a time slot. This configuration ensures that the retransmission resources indicated by the NR terminal will not exceed 15 time units, thus matching the situation where the maximum time interval between the retransmission resources and the initial transmission resources of the LTE terminal is only 15 subframes, enabling the LTE terminal to correctly decode and utilize the retransmission resources indicated by the NR terminal.

[0188] Alternatively, when any one of the higher-layer indication, DCI indication, and SCI indication indicates three transmission resources, the control information indicates two of the three transmission resources. This configuration ensures that the LTE terminal will not fail to correctly obtain the NR terminal's resources even if the NR terminal indicates three reserved resources. It should be noted that the control information can be the second or first control information of the NR terminal, or it can be the third control information of the LTE terminal. The two transmission resources indicated by the control information satisfy at least one of the following:

[0189] Any two of the three transport resources;

[0190] Of the three transmission resources, the two with the earlier or later time-domain location;

[0191] Of the three transmission resources, the two that are closer or farther apart in the time domain.

[0192] In this embodiment, the terminal's resource selection includes, but is not limited to, at least one of the following: determining a resource detection period (also known as a resource detection window), determining a resource selection period (also known as a resource selection window), determining an RSRP threshold, resource detection, resource exclusion, and resource reselection. For better understanding, specific embodiments are described below.

[0193] For example, taking the terminal as an NR terminal, the resource selection process of the NR terminal may include the following steps: 1. Determine the position of the resource selection window; 2. Determine the position of the resource detection window, wherein, due to the introduction of the first control information, the parameters that determine the position of the resource detection window are... The value needs to take into account the processing time of the first control information; 3. Determine the priority of the data sent by the NR terminal and the intermediate parameters of RSRP, i.e., the preset RSRP threshold; 4. Initialize the resource candidate set; 5. Exclude candidate resources in the resource candidate set that cannot be determined whether there are reserved resources to collide with them due to reasons such as half-duplex during the resource detection process; 6. Determine the terminal type or resource allocation related information corresponding to the detected control information. If it is an LTE terminal, perform resource exclusion based on the periodic reservation information and retransmission information obtained by decoding. At this time, according to the protocol predefined or network preconfiguration or network configuration, resource exclusion can be performed only based on the resource overlap situation to achieve the purpose of NR terminal avoiding LTE terminal, thereby achieving co-frequency coexistence; or it can be determined whether the preset RSRP threshold situation is met on the basis of resource overlap, so that the NR terminal can obtain better performance on the basis of co-frequency coexistence; If it is an NR terminal, according to the protocol predefined or network preconfiguration or network configuration, obtain periodic reservation and non-periodic reservation information from the indication field of the corresponding control information (first control information or second control information) and perform resource exclusion.

[0194] The solution provided in this application embodiment allows the terminal to select resources by obtaining the corresponding resource reservation information. By defining the relevant rules for resource selection between NR and LTE terminals, the NR and LTE terminals can coexist on the same frequency. This ensures that the NR terminal can communicate normally on the coexisting frequency band without affecting the overall performance of the LTE terminal, thereby improving the communication efficiency of the sidelink communication system.

[0195] In this embodiment of the application, after the terminal selects resources based on the resource reservation information, the method further includes:

[0196] The terminal indicates resource reservation information based on the selected resource.

[0197] Furthermore, the method also includes:

[0198] The terminal sets the reserved period indication field in the first control information or the second control information to a period reserved value.

[0199] For example, the terminal is an NR terminal. The NR terminal can set the reserved period indication field in its first control information to a period reserved value, or set the reserved period indication field in its second control information to a period reserved value, so that the receiving terminal can obtain reserved resources based on the period reserved value in the first control information or the second control information.

[0200] Optionally, if the second resource reservation method and / or resource selection method of the terminal is the first preset method, the terminal satisfies at least one of the following:

[0201] The transmitted TB is associated with N HARQ processes, where N is a positive integer;

[0202] The time interval between the reserved resources of the first resource reservation method and / or the second resource reservation method and the resources of the first transmission method is greater than a first time, where the first time is the data processing time and / or PSFCH transmission processing time of the terminal;

[0203] When the terminal is the second type of terminal, resource reservation information is obtained by detecting the first control information of each HARQ of the second type of terminal and the first type of terminal, and resource exclusion is performed.

[0204] It should be noted that the first preset method is determined by at least one of the following: protocol predefinition, preconfiguration, configuration, and indication. The relevant concepts involved in the first preset method can be referred to the description in the foregoing embodiments, and will not be repeated here.

[0205] Optionally, when the protocol predefines, preconfigures, configures, or instructs the NR terminal to use a second resource reservation method (also known as an aperiodic reservation method) and / or a resource selection method that is the first preset method, the TB transmitted by the NR terminal is associated with N HARQ processes to utilize multiple different HARQ processes to achieve aperiodic resource reservation. The value of N can be determined as described in the foregoing embodiments.

[0206] Alternatively, in some embodiments, when the second resource reservation mode and / or resource selection mode of the NR terminal is the first preset mode, the time interval between the reserved resources of the second resource reservation mode corresponding to the NR terminal and the resources of the first transmission mode is greater than a first time, and / or the time interval between the reserved resources of the first resource reservation mode corresponding to the NR terminal and the resources of the first transmission mode is greater than a first time, wherein the first time is the terminal's data processing time and / or PSFCH transmission processing time, or the first time may also be a time calculated based on the terminal's data processing time and PSFCH transmission processing time.

[0207] Alternatively, in some embodiments, if the terminal is an LTE terminal, and the second resource reservation mode and / or resource selection mode of the LTE terminal is the first preset mode, the LTE terminal obtains resource reservation information by detecting the first control information of each HARQ of the LTE terminal and the NR terminal, and performs resource exclusion, thereby avoiding the resource reservation information of the NR terminal, so as to achieve co-frequency coexistence of resources of the LTE terminal and the NR terminal.

[0208] Optionally, if the second resource reservation method and / or resource selection method of the terminal is the second preset method, the terminal satisfies at least one of the following:

[0209] The time-domain and frequency-domain resources reserved by the second resource reservation method are indicated by the time-domain reservation indication field and the frequency-domain reservation indication field of the second control information;

[0210] The time interval between the reserved resources in the second resource reservation method and the resources transmitted in the first transmission method is greater than a first time, where the first time is the data processing time of the terminal or the PSFCH transmission processing time.

[0211] It should be noted that the second preset method is determined by at least one of the following: protocol predefinition, preconfiguration, configuration, and indication. The relevant concepts involved in the second preset method can be referred to the description in the foregoing embodiments, and will not be repeated here.

[0212] Optionally, the terminal is an NR terminal. When the protocol predefines or preconfigures or configures or instructs the NR terminal to have a second resource reservation mode and / or resource selection mode as a second preset mode, the time domain resources and frequency domain resources reserved by the second resource reservation mode are indicated by the time domain reservation indication field and frequency domain reservation indication field of the second control information.

[0213] Alternatively, in some embodiments, when the second resource reservation mode and / or resource selection mode of the NR terminal is the second preset mode, the time interval between the preview resource of the second resource reservation mode and the resource transmitted by the first transmission mode is greater than a first time. The first time is the terminal's data processing time and / or PSFCH transmission processing time. Alternatively, the first time can also be a time calculated based on the terminal's data processing time and PSFCH transmission processing time.

[0214] To better understand, the implementation of the second resource reservation method (non-periodic reservation method) will be explained below through several specific embodiments.

[0215] Please refer to Figure 3a Taking an NR terminal as an example, during the resource selection process, the NR terminal selects four time-frequency domain resources for transmitting one data TB, denoted as PSSCH1. These four time-frequency domain resources are allocated to four different HARQ processes. Then, a HARQ association indication is carried in the control information to indicate that the resources reserved by the terminal's four current HARQ processes belong to the same TB of reserved resources. At this point, the LTE terminal excludes the NR reserved resources through resource exclusion from different HARQ processes, thus achieving co-frequency coexistence.

[0216] Please refer to Figure 3b Taking an NR terminal as an example, during the resource selection process, the NR terminal selects four time-frequency domain resources for transmitting one data TB, denoted as PSSCH2. These four time-frequency domain resources are allocated to two different HARQ processes. While utilizing the HARQ processes to implement the second resource reservation method (non-periodic reservation), the existing blind retransmission indication field in LTE Sidelink is used to indicate retransmission opportunities within the same HARQ process. In this way, by utilizing the blind retransmission indication field in the control information, the number of HARQ processes can be reduced for the same number of retransmissions, thereby reducing the number of bits occupied by the indication field for the relevant HARQ processes.

[0217] Please refer to Figure 3c Taking an NR terminal as an example, during the resource selection process, the NR terminal selects three time-frequency domain resources for transmitting one TB of data, denoted as PSSCH3. The NR terminal reuses the resource reservation concept from R16 / R17 for aperiodic resource reservation, indicating the time-frequency domain location of the resources through the time-domain and frequency-domain indicator fields in the relevant control information. At this point, to achieve co-frequency coexistence and avoid collisions, the NR terminal excludes detected LTE reserved resources during the resource selection process. Simultaneously, before transmitting data, it performs re-evaluation and / or resource preemption detection to further determine whether a conflict with LTE reserved resources will occur. If a collision (resource overlap) occurs, resource reselection is performed, thereby ensuring co-frequency coexistence.

[0218] In this embodiment of the application, the method may further include:

[0219] The terminal performs re-evaluation and / or resource preemption detection.

[0220] Optionally, the terminal performs reassessment and / or resource preemption detection, including at least one of the following:

[0221] If the selected resource overlaps with the resource indicated by the third control information and / or the indicated retransmission resource, the terminal performs resource reselection;

[0222] Set the preset RSRP threshold for the first type of terminal to be different from the preset RSRP threshold for the second type of terminal.

[0223] No preset RSRP threshold is set for reserved resources for the second type of terminal;

[0224] Change the priority of data transmission and / or reserved resources for the second type of terminal;

[0225] Priority comparison is not performed on the data transmitted and / or reserved resources of the second type of terminal.

[0226] In this embodiment, the terminal performing re-evaluation and / or resource preemption detection can be a first type of terminal (i.e., an NR terminal), and the second type of terminal is an LTE terminal. For example, if the selected resources of the NR terminal overlap with the resources indicated by the third control information of the LTE terminal, the NR terminal performs resource reselection. Another example is that the NR terminal may set a different preset RSRP threshold for the LTE terminal than the preset RSRP threshold for the NR terminal to perform resource re-evaluation and / or resource preemption detection. Of course, other possible implementations of resource re-evaluation and / or resource preemption detection by the NR terminal are also possible, and will not be listed here.

[0227] It should be noted that since LTE terminals cannot identify non-periodic reserved resources of NR terminals through continuous partial sensing (CPS), in certain scenarios such as non-periodic services, in order to enhance the performance of co-frequency coexistence, the selected resources can be further detected based on NR re-evaluation and / or resource preemption detection. If it is detected that an LTE terminal has reserved the selected resources of the NR terminal, the NR terminal can be triggered to reselect, thereby avoiding the reserved resources of the LTE terminal.

[0228] Meanwhile, if LTE terminals are configured in the resource pool and resources are scheduled by the base station, while NR terminals select resources autonomously, in order to prevent the resources scheduled by the base station for LTE terminals from colliding with the resources selected by NR terminals, resources can be re-evaluated and / or resource preemption detection can be used to reselect resources, thereby achieving the purpose of co-frequency coexistence.

[0229] In addition, during reassessment and / or resource preemption detection, it is possible to enhance the resource usage of LTE terminals by implementing rules such as ignoring priority determination rules, ignoring RSRP threshold determination rules, increasing the priority of LTE terminals, and defining special RSRP thresholds for LTE terminals, so that NR terminals can more easily avoid the reserved resources of LTE terminals.

[0230] In this embodiment of the application, the method may further include:

[0231] The terminal reports detection information and / or candidate resource sets to the network-side device.

[0232] Optionally, the terminal reports detection information and / or a set of candidate resources to the network-side device, including at least one of the following:

[0233] The terminal reports the reserved resources of the second type of terminal detected to the network side device;

[0234] The terminal reports a set of candidate resources to the network-side device after excluding the reserved resources of the second type of terminal.

[0235] It should be noted that when the resource pool is configured with LTE autonomous resource allocation and NR base station scheduling resources, in order to achieve coexistence on the same frequency and avoid the base station scheduling the resources reserved for LTE terminals when scheduling resources for NR terminals, thereby causing resource collisions, the NR terminal can report auxiliary information to assist the base station in scheduling resources.

[0236] Optionally, the NR terminal can report its own detection results to the base station. In this case, the detection results represent the reserved resources for LTE terminals detected by the NR terminal. Alternatively, the NR terminal can report a set of candidate resources to the base station. This set consists of resources recommended by the NR terminal, excluding the reserved resources for LTE terminals detected by the NR terminal. The base station schedules the transmission resources of the NR terminal based on the information reported by the terminal, achieving co-frequency coexistence with LTE's autonomous resource allocation.

[0237] In this embodiment of the application, when the terminal is an LTE terminal, the method may further include:

[0238] The terminal performs resource exclusion based on resource collision and RSSI measurement sorting.

[0239] Optionally, the LTE terminal can exclude resources from the resource candidate set based on resource collision and RSSI measurement ranking, which can solve the problem of inaccurate RSRP measurement of the LTE terminal caused by the NR terminal not reusing LTE DMRS design.

[0240] It should be noted that the resource selection method provided in this application embodiment can be executed by a resource selection device, or by a control module within the resource selection device for executing the resource selection method. This application embodiment uses the execution of the resource selection method by a resource selection device as an example to illustrate the resource selection device provided in this application embodiment.

[0241] Please refer to Figure 4 , Figure 4 This is a resource selection device provided in an embodiment of this application. For example... Figure 4 As shown, the resource selection device 400 includes:

[0242] Module 401 is used to obtain resource reservation information;

[0243] The resource selection module 402 is used to select resources based on the resource reservation information.

[0244] Optionally, the resource reservation information includes at least one of the following: the priority of the data packet, the period value of the first resource reservation method, the time domain resources reserved by the second resource reservation method, the frequency domain resources reserved by the second resource reservation method, the time domain resources of the first transmission method, the time domain resources of different HARQ processes corresponding to the same transport block TB, and the frequency domain resources of different HARQ processes corresponding to the same TB.

[0245] Optionally, the acquisition module is configured to perform at least one of the following:

[0246] Resource reservation information is obtained from the resource reservation indication field of the first control information, wherein the first control information is the control information of a first type of device;

[0247] Resource reservation information is obtained from the resource reservation indication field of the second control information, wherein the second control information is the control information of the first type of device;

[0248] Resource reservation information is obtained from the resource reservation indication field of the third control information, wherein the third control information is the control information of the second type of device;

[0249] When the second resource reservation mode and / or resource selection mode of the device is the first preset mode, the resource reservation information is obtained from the HARQ association indication information in the first control information, or the resource reservation information is obtained from the HARQ association indication information in the second control information;

[0250] When the second resource reservation mode and / or resource selection mode of the device is the second preset mode, resource reservation information is obtained from the resource reservation indication field in the second control information;

[0251] When the device adopts the first transmission mode and the second resource reservation mode, the resource reservation information is obtained from the resource reservation indication field of the second control information and the time interval indication field between the initial transmission and retransmission in the first control information.

[0252] Optionally, the first preset method is determined by at least one of the following: protocol predefinition, preconfiguration, configuration, and indication;

[0253] And / or,

[0254] The second preset method is determined by at least one of the following: protocol predefinition, preconfiguration, configuration, and indication.

[0255] Optionally, in the first preset mode, the device satisfies at least one of the following:

[0256] The device transmits TB associated with N HARQ processes, where N is a positive integer;

[0257] The time interval between the reserved resources in the second resource reservation method and the resources transmitted in the first transmission method is the data processing time of the device or the physical sidelink feedback channel PSFCH transmission processing time.

[0258] When the device is a second type of device, resource reservation information is determined and resource exclusion is performed by detecting the first control information of each HARQ of the second type of device and the first type of device.

[0259] Optionally, the value of N satisfies at least one of the following:

[0260] Determined by at least one of the following: protocol predefined, configuration, configuration, Radio Resource Control (RRC) indication, Media Access Control (MAC) CE indication, Downlink Control Information (DCI) indication, and Sidelink Control Information (SCI) indication;

[0261] It is related to at least one of the following: channel occupancy rate, channel busy rate, maximum number of retransmissions, conversion type, number of receiving terminals, and maximum number of HARQ processes.

[0262] Optionally, if the device satisfies the requirement of transmitting TB associated with N HARQ processes, the device also satisfies at least one of the following:

[0263] Select M×N candidate resources, where M is 1 or 2;

[0264] Send association indication information, which is used to indicate that the reserved resources of Q HARQ processes are the same TB of reserved resources, where Q is a positive integer less than or equal to N.

[0265] Optionally, the association indication information is implemented through at least one of the following:

[0266] In the reserved bits of the first control information, a HARQ process association indication field is sent to indicate at least one of the time domain resources and frequency domain resources of the Q HARQ process reserved resources;

[0267] The second control information sends a HARQ process association indication field, indicating at least one of the time domain resources and frequency domain resources reserved by the Q HARQ processes;

[0268] When the second control information is in the first information format, the time domain resource indication field in the second control information indicates the time domain resources reserved by two or three HARQ processes, and / or the frequency domain resource indication field in the first control information indicates the frequency domain resources reserved by two or three HARQ processes.

[0269] Optionally, when the HARQ process association indication field is sent in the reserved bits of the first control information, the value of Q is related to at least one of the following: the number of remaining reserved bits of the first control information, the channel occupancy rate, the channel busy rate, the maximum number of retransmissions, the conversion type, the number of receiving terminals, and the maximum number of HARQ processes.

[0270] When the HARQ process association indication field is sent in the second control information, the value of Q is related to at least one of the following: the number of bits in the second control information, the number of free bits in the second control information, the channel occupancy rate, the channel busy rate, the maximum number of retransmissions, the conversion type, the number of receiving terminals, and the maximum number of HARQ processes.

[0271] Optionally, in the second preset mode, the device satisfies at least one of the following:

[0272] The time-domain and frequency-domain resources of the first reserved resource are determined by the time-domain and frequency-domain reservation indication fields of the second control information;

[0273] The time interval between the reserved resources in the second resource reservation method and the resources transmitted in the first transmission method is the data processing time of the terminal or the PSFCH transmission processing time.

[0274] Optionally, the resource selection module is further configured to:

[0275] Based on the resource reservation information, resources that meet the preset conditions are excluded from the resource candidate set;

[0276] Set the preset RSRP threshold corresponding to the first type of device to be different from the preset RSRP threshold corresponding to the second type of device;

[0277] Change the priority of data transmission by the second type of device;

[0278] Change the RSRP associated with the second type of device obtained from the measurement.

[0279] Optionally, the preset conditions include at least one of the following:

[0280] The resource where the resource reservation information is located at least partially overlaps with the resources and / or reserved resources in the resource candidate set, and the measured RSRP is greater than the preset RSRP threshold.

[0281] The reserved resources indicated by the resource reservation information at least partially overlap with the resources and / or reserved resources in the resource candidate set, and the measured RSRP is greater than a preset RSRP threshold.

[0282] The resource reservation information is located in a resource that at least partially overlaps with the resources and / or reserved resources in the resource candidate set;

[0283] The reserved resources indicated by the resource reservation information at least partially overlap with the resources and / or reserved resources in the resource candidate set.

[0284] Optionally, the resource selection module is further configured to:

[0285] Initialize the resource candidate set.

[0286] Optionally, the resource selection module is further configured to obtain at least one of the following:

[0287] At least some of the candidate resources in the resource selection window;

[0288] The resource selection window contains at least a portion of the candidate resources after removing unmonitored resources and the reserved resources of the unmonitored resources;

[0289] Empty set.

[0290] Optionally, the resource selection module is further configured to:

[0291] Obtain the measured RSRP.

[0292] Optionally, the resource selection module is further configured to:

[0293] The measured RSRP is obtained based on the demodulated reference signal DMRS mode.

[0294] Optionally, the resource selection module is further configured to perform at least one of the following:

[0295] The DMRS mode is determined based on the first information, and the measured RSRP is obtained based on the DMRS mode;

[0296] The measured RSRP is obtained based on the DMRS transmitted on the target antenna port, which is the antenna port indicated by the first control information.

[0297] Optionally, the first information includes at least one of the following: control information format, resource where the control information is located, type of received signal, type information of the device, relevant indication field of the DMRS mode, version information of the DMRS mode, and resource allocation method of the DMRS mode.

[0298] Optionally, when the device is a type II device, the measured RSRP value is the average or weighted average of the values ​​measured on the Physical Sidelink Control Channel (PSCCH) and the Physical Sidelink Shared Channel (PSSCH).

[0299] Optionally, the resource selection module is further configured to:

[0300] Based on the Received Signal Strength Indication (RSSI) measurement results, the resources in the resource candidate set that have been excluded from resource selection are sorted.

[0301] Optionally, the device further includes:

[0302] The indicator module is used to indicate resource reservation information based on the selected resource.

[0303] Optionally, the device further includes:

[0304] The setting module is used to set the reserved cycle indicator field in the first control information or the second control information to a cycle reserved value.

[0305] Optionally, if the second resource reservation mode and / or resource selection mode of the device is the first preset mode, the device satisfies at least one of the following:

[0306] The transmitted TB is associated with N HARQ processes, where N is a positive integer;

[0307] The time interval between the reserved resources of the first resource reservation method and / or the second resource reservation method and the resources of the first transmission method is greater than a first time, where the first time is the data processing time and / or PSFCH transmission processing time of the device;

[0308] When the device is the second type of device, resource reservation information is obtained by detecting the first control information of each HARQ of the second type of device and the first type of device, and resource exclusion is performed;

[0309] or,

[0310] If the second resource reservation mode and / or resource selection mode of the device is a second preset mode, the device satisfies at least one of the following:

[0311] The time-domain and frequency-domain resources reserved by the second resource reservation method are indicated by the time-domain reservation indication field and the frequency-domain reservation indication field of the second control information;

[0312] The time interval between the reserved resources in the second resource reservation method and the resources transmitted in the first transmission method is greater than a first time, where the first time is the data processing time or PSFCH transmission processing time of the device.

[0313] Optionally, the device further includes:

[0314] The detection module is used for reassessment and / or resource preemption detection.

[0315] Optionally, the detection module is configured to perform at least one of the following:

[0316] If the selected resource overlaps with the resource indicated by the third control information and / or the indicated retransmission resource, the device performs resource reselection;

[0317] Set the preset RSRP threshold corresponding to the first type of device to be different from the preset RSRP threshold corresponding to the second type of device;

[0318] No preset RSRP threshold is set for the reserved resources of the second type of device;

[0319] Change the priority of data transmission and / or reserved resources for the second type of device;

[0320] No priority comparison is performed on the transmitted data and / or reserved resources of the second type of device.

[0321] Optionally, the device further includes:

[0322] The reporting module is used to report detection information and / or candidate resource sets to network-side devices.

[0323] Optionally, the reporting module is further configured to perform at least one of the following:

[0324] Report the reserved resources of the detected second type of terminal to the network-side device;

[0325] The candidate resource set, after excluding the reserved resources of the second type of terminal, is reported to the network-side device.

[0326] Optionally, if the device is a second type of device, the acquisition module is further configured to perform at least one of the following:

[0327] Periodic reservation information is obtained from the resource reservation indication field of the first control information, wherein the first control information is the control information of a first type of device;

[0328] The reserved information for the first transmission mode is obtained from the time interval indication field between the initial transmission and the retransmission.

[0329] Optionally, if the device is a type II device, the device further includes:

[0330] The exclusion module is used to exclude resources based on resource collision and RSSI measurement sorting.

[0331] Optionally, when the device performs resource selection, the resource detection time period of the device is located within... Within the range;

[0332] Where n is the time that triggers resource selection, and T0 is a variable related to the duration of the detection window indicated by the higher-level authority. Parameters that are predefined for the protocol or preconfigured or configured for the network.

[0333] Optionally, the reserved period set of the first type of device is determined by at least one of the following: protocol predefinition, preconfiguration, and configuration.

[0334] Optionally, the number of transmission resources of the device is authorized by any one of DCI indication, SCI indication, higher layer indication and configuration authorization, and the number of transmission resources is at most two;

[0335] Optionally, the maximum time interval of the transmission resources is 15 time units.

[0336] Optionally, when any one of the higher layer indication, DCI indication, and SCI indication indicates three transmission resources, the control information indicates two of the three transmission resources.

[0337] Optionally, the two transmission resources indicated by the control information satisfy at least one of the following:

[0338] Any two of the three transport resources;

[0339] Of the three transmission resources, the two with the earlier or later time-domain location;

[0340] Of the three transmission resources, the two that are closer or farther apart in the time domain.

[0341] It should be noted that the device described in the embodiments of this application may also refer to the terminal in the above embodiments. The first type of device and the second type of device may refer to the first type of terminal and the second type of terminal in the above embodiments, respectively, or they may refer to the internal components in the first type of terminal and the second type of terminal that can execute the above resource control method.

[0342] In this embodiment of the application, the device selects resources by acquiring corresponding resource reservation information. By defining relevant rules for resource selection of devices with different communication types, devices with different communication types can coexist on the same frequency, thereby improving the communication efficiency of the side link communication system.

[0343] The resource selection device in this application embodiment can be a device, a device or electronic device with an operating system, or a component, integrated circuit, or chip in a terminal. The device or electronic device can be a mobile terminal or a non-mobile terminal. For example, a mobile terminal can include, but is not limited to, the types of terminals 11 listed above, while a non-mobile terminal can be a server, network attached storage (NAS), personal computer (PC), television (TV), ATM, or self-service machine, etc. This application embodiment does not impose specific limitations.

[0344] The resource selection device provided in this application embodiment can achieve... Figures 2 to 3c The various processes implemented in the method embodiment achieve the same technical effect, and will not be described again here to avoid repetition.

[0345] Optional, such as Figure 5 As shown, this application embodiment also provides a communication device 500, including a processor 501, a memory 502, and a program or instructions stored in the memory 502 and executable on the processor 501. For example, when the communication device 500 is a terminal, the program or instructions executed by the processor 501 implement the various processes of the above-described resource selection method embodiment and can achieve the same technical effect. To avoid repetition, it will not be described again here.

[0346] This application embodiment also provides a terminal, including a processor and a communication interface. The processor is used to acquire resource reservation information and select resources based on the resource reservation information. This terminal embodiment corresponds to the above-described terminal-side method embodiment. All implementation processes and methods of the above method embodiments can be applied to this terminal embodiment and achieve the same technical effects. Specifically, Figure 6 A schematic diagram of the hardware structure of a terminal to implement an embodiment of this application.

[0347] The terminal 600 includes, but is not limited to, at least some of the following components: radio frequency unit 601, network module 602, audio output unit 603, input unit 604, sensor 605, display unit 606, user input unit 607, interface unit 608, memory 609, and processor 610.

[0348] Those skilled in the art will understand that the terminal 600 may also include a power supply (such as a battery) for supplying power to various components. The power supply may be logically connected to the processor 610 through a power management system, thereby enabling functions such as managing charging, discharging, and power consumption through the power management system. Figure 6 The terminal structure shown does not constitute a limitation on the terminal. The terminal may include more or fewer components than shown, or combine certain components, or have different component arrangements, which will not be elaborated here.

[0349] It should be understood that, in this embodiment, the input unit 604 may include a graphics processing unit (GPU) 6041 and a microphone 6042. The GPU 6041 processes image data of still images or videos obtained by an image capture device (such as a camera) in video capture mode or image capture mode. The display unit 606 may include a display panel 6061, which may be configured in the form of a liquid crystal display, an organic light-emitting diode, or the like. The user input unit 607 includes a touch panel 6071 and other input devices 6072. The touch panel 6071 is also called a touch screen. The touch panel 6071 may include a touch detection device and a touch controller. Other input devices 6072 may include, but are not limited to, a physical keyboard, function keys (such as volume control buttons, power buttons, etc.), a trackball, a mouse, and a joystick, which will not be described in detail here.

[0350] In this embodiment, the radio frequency unit 601 receives downlink data from the network-side device and processes it for the processor 610; additionally, it sends uplink data to the network-side device. Typically, the radio frequency unit 601 includes, but is not limited to, an antenna, at least one amplifier, a transceiver, a coupler, a low-noise amplifier, a duplexer, etc.

[0351] The memory 609 can be used to store software programs or instructions and various data. The memory 609 may primarily include a program or instruction storage area and a data storage area. The program or instruction storage area may store the operating system, application programs or instructions required for at least one function (such as sound playback, image playback, etc.). Furthermore, the memory 609 may include high-speed random access memory and non-volatile memory, wherein the non-volatile memory may be read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), or flash memory. For example, at least one disk storage device, flash memory device, or other non-volatile solid-state storage device.

[0352] Processor 610 may include one or more processing units; optionally, processor 610 may integrate an application processor and a modem processor, wherein the application processor mainly handles the operating system, user interface, and applications or instructions, and the modem processor mainly handles wireless communication, such as a baseband processor. It is understood that the aforementioned modem processor may also not be integrated into processor 610.

[0353] The processor 610 is used to obtain resource reservation information and select resources based on the resource reservation information.

[0354] Optionally, the resource reservation information includes at least one of the following: the priority of the data packet, the period value of the first resource reservation method, the time domain resources reserved by the second resource reservation method, the frequency domain resources reserved by the second resource reservation method, the time domain resources of the first transmission method, the time domain resources of different HARQ processes corresponding to the same transport block TB, and the frequency domain resources of different HARQ processes corresponding to the same TB.

[0355] Optionally, the processor 610 is also configured to perform at least one of the following:

[0356] Resource reservation information is obtained from the resource reservation indication field of the first control information, wherein the first control information is the control information of the first type of terminal;

[0357] Resource reservation information is obtained from the resource reservation indication field of the second control information, where the second control information is the control information of the first type of terminal.

[0358] Resource reservation information is obtained from the resource reservation indication field of the third control information, wherein the third control information is the control information of the second type of terminal;

[0359] When the second resource reservation mode and / or resource selection mode of the terminal is the first preset mode, the resource reservation information is obtained from the HARQ association indication information in the first control information, or the resource reservation information is obtained from the HARQ association indication information in the second control information;

[0360] When the second resource reservation mode and / or resource selection mode of the terminal is the second preset mode, resource reservation information is obtained from the resource reservation indication field in the second control information;

[0361] When the terminal adopts the first transmission mode and the second resource reservation mode, the resource reservation information is obtained from the resource reservation indication field of the second control information and the time interval indication field between the initial transmission and retransmission in the first control information.

[0362] Optionally, the first preset method is determined by at least one of the following: protocol predefinition, preconfiguration, configuration, and indication;

[0363] And / or,

[0364] The second preset method is determined by at least one of the following: protocol predefinition, preconfiguration, configuration, and indication.

[0365] Optionally, under the first preset mode, the terminal satisfies at least one of the following:

[0366] The TB transmitted by the terminal is associated with N HARQ processes, where N is a positive integer;

[0367] The time interval between the reserved resources in the second resource reservation method and the resources transmitted in the first transmission method is the data processing time of the terminal or the physical sidelink feedback channel PSFCH transmission processing time.

[0368] When the terminal is the second type of terminal, resource reservation information is determined and resource exclusion is performed by detecting the first control information of each HARQ of the second type of terminal and the first type of terminal.

[0369] Optionally, the value of N satisfies at least one of the following:

[0370] Determined by at least one of the following: protocol predefined, configuration, configuration, Radio Resource Control (RRC) indication, Media Access Control (MAC) CE indication, Downlink Control Information (DCI) indication, and Sidelink Control Information (SCI) indication;

[0371] It is related to at least one of the following: channel occupancy rate, channel busy rate, maximum number of retransmissions, conversion type, number of receiving terminals, and maximum number of HARQ processes.

[0372] Optionally, if the terminal satisfies the requirement of TB associated with N HARQ processes for transmission, the processor 610 is further configured to perform at least one of the following:

[0373] Select M×N candidate resources, where M is 1 or 2;

[0374] Send association indication information, which is used to indicate that the reserved resources of Q HARQ processes are the same TB of reserved resources, where Q is a positive integer less than or equal to N.

[0375] Optionally, the association indication information is implemented through at least one of the following:

[0376] In the reserved bits of the first control information, a HARQ process association indication field is sent to indicate at least one of the time domain resources and frequency domain resources of the Q HARQ process reserved resources;

[0377] The second control information sends a HARQ process association indication field, indicating at least one of the time domain resources and frequency domain resources reserved by the Q HARQ processes;

[0378] When the second control information is in the first information format, the time domain resource indication field in the second control information indicates the time domain resources reserved by two or three HARQ processes, and / or the frequency domain resource indication field in the first control information indicates the frequency domain resources reserved by two or three HARQ processes.

[0379] Optionally, when the HARQ process association indication field is sent in the reserved bits of the first control information, the value of Q is related to at least one of the following: the number of remaining reserved bits of the first control information, the channel occupancy rate, the channel busy rate, the maximum number of retransmissions, the conversion type, the number of receiving terminals, and the maximum number of HARQ processes.

[0380] When the HARQ process association indication field is sent in the second control information, the value of Q is related to at least one of the following: the number of bits in the second control information, the number of free bits in the second control information, the channel occupancy rate, the channel busy rate, the maximum number of retransmissions, the conversion type, the number of receiving terminals, and the maximum number of HARQ processes.

[0381] Optionally, in the second preset mode, the processor 610 is further configured to perform at least one of the following:

[0382] The time-domain and frequency-domain resources of the first reserved resource are determined by the time-domain and frequency-domain reservation indication fields of the second control information;

[0383] The time interval between the reserved resources in the second resource reservation method and the resources transmitted in the first transmission method is the data processing time of the terminal or the PSFCH transmission processing time.

[0384] Optionally, the processor 610 is further configured to perform at least one of the following:

[0385] Based on the resource reservation information, resources that meet the preset conditions are excluded from the resource candidate set;

[0386] Set the preset RSRP threshold for the first type of terminal to be different from the preset RSRP threshold for the second type of terminal.

[0387] Change the priority of data transmission from the second type of terminal;

[0388] Change the RSRP associated with the second type of terminal obtained from the measurement.

[0389] Optionally, the preset conditions include at least one of the following:

[0390] The resource where the resource reservation information is located at least partially overlaps with the resources and / or reserved resources in the resource candidate set, and the measured RSRP is greater than the preset RSRP threshold.

[0391] The reserved resources indicated by the resource reservation information at least partially overlap with the resources and / or reserved resources in the resource candidate set, and the measured RSRP is greater than a preset RSRP threshold.

[0392] The resource reservation information is located in a resource that at least partially overlaps with the resources and / or reserved resources in the resource candidate set;

[0393] The reserved resources indicated by the resource reservation information at least partially overlap with the resources and / or reserved resources in the resource candidate set.

[0394] Optionally, the processor 610 is further configured to:

[0395] Initialize the resource candidate set.

[0396] Optionally, the processor 610 is further configured to obtain at least one of the following:

[0397] At least some of the candidate resources in the resource selection window;

[0398] The resource selection window contains at least a portion of the candidate resources after removing unmonitored resources and the reserved resources of the unmonitored resources;

[0399] Empty set.

[0400] Optionally, the processor 610 is further configured to:

[0401] Obtain the measured RSRP.

[0402] Optionally, the processor 610 is further configured to:

[0403] The measured RSRP is obtained based on the demodulated reference signal DMRS mode.

[0404] Optionally, the processor 610 is further configured to perform at least one of the following:

[0405] The DMRS mode is determined based on the first information, and the measured RSRP is obtained based on the DMRS mode;

[0406] The measured RSRP is obtained based on the DMRS transmitted on the target antenna port, which is the antenna port indicated by the first control information.

[0407] Optionally, the first information includes at least one of the following: control information format, resource where the control information is located, type of received signal, type information of the terminal, relevant indication field of the DMRS mode, version information of the DMRS mode, and resource allocation method of the DMRS mode.

[0408] Optionally, when the terminal is a type 2 terminal, the measured RSRP value is the average or weighted average of the values ​​measured on the Physical Sidelink Control Channel (PSCCH) and the Physical Sidelink Shared Channel (PSSCH).

[0409] Optionally, the processor 610 is further configured to:

[0410] Based on the Received Signal Strength Indication (RSSI) measurement results, the resources in the resource candidate set that have been excluded from resource selection are sorted.

[0411] Optionally, the processor 610 is further configured to:

[0412] The terminal indicates resource reservation information based on the selected resource.

[0413] Optionally, the processor 610 is further configured to:

[0414] The terminal sets the reserved period indication field in the first control information or the second control information to a period reserved value.

[0415] Optionally, if the second resource reservation method and / or resource selection method of the terminal is the first preset method, the terminal satisfies at least one of the following:

[0416] The transmitted TB is associated with N HARQ processes, where N is a positive integer;

[0417] The time interval between the reserved resources of the first resource reservation method and / or the second resource reservation method and the resources of the first transmission method is greater than a first time, where the first time is the data processing time and / or PSFCH transmission processing time of the terminal;

[0418] When the terminal is the second type of terminal, resource reservation information is obtained by detecting the first control information of each HARQ of the second type of terminal and the first type of terminal, and resource exclusion is performed;

[0419] or,

[0420] If the second resource reservation method and / or resource selection method of the terminal is a second preset method, the terminal satisfies at least one of the following:

[0421] The time-domain and frequency-domain resources reserved by the second resource reservation method are indicated by the time-domain reservation indication field and the frequency-domain reservation indication field of the second control information;

[0422] The time interval between the reserved resources in the second resource reservation method and the resources transmitted in the first transmission method is greater than a first time, where the first time is the data processing time of the terminal or the PSFCH transmission processing time.

[0423] Optionally, the processor 610 is further configured to:

[0424] The terminal performs re-evaluation and / or resource preemption detection.

[0425] Optionally, the processor 610 is further configured to perform at least one of the following:

[0426] If the selected resource overlaps with the resource indicated by the third control information and / or the indicated retransmission resource, the terminal performs resource reselection;

[0427] Set the preset RSRP threshold for the first type of terminal to be different from the preset RSRP threshold for the second type of terminal.

[0428] No preset RSRP threshold is set for reserved resources for the second type of terminal;

[0429] Change the priority of data transmission and / or reserved resources for the second type of terminal;

[0430] Priority comparison is not performed on the data transmitted and / or reserved resources of the second type of terminal.

[0431] Optionally, the processor 610 is further configured to:

[0432] Report detection information and / or candidate resource sets to network-side devices.

[0433] Optionally, the processor 610 is further configured to perform at least one of the following:

[0434] Report the reserved resources of the detected second type of terminal to the network-side device;

[0435] The candidate resource set, after excluding the reserved resources of the second type of terminal, is reported to the network-side device.

[0436] Optionally, if the terminal is a second type of terminal, the processor 610 is further configured to perform at least one of the following:

[0437] Periodic reservation information is obtained from the resource reservation indication field of the first control information, wherein the first control information is the control information of the first type of terminal;

[0438] The reserved information for the first transmission mode is obtained from the time interval indication field between the initial transmission and the retransmission.

[0439] Optionally, if the terminal is a second type of terminal, the processor 610 is further configured to:

[0440] Resource exclusion is based on resource collision and RSSI measurement sorting.

[0441] Optionally, when the terminal is selecting resources, the resource detection time period of the terminal is located within... Within the range;

[0442] Where n is the time that triggers resource selection, and T0 is a variable related to the duration of the detection window indicated by the higher-level authority. Parameters that are predefined for the protocol or preconfigured or configured for the network.

[0443] Optionally, the reserved period set for the first type of terminal is determined by at least one of the following: protocol predefinition, preconfiguration, and configuration.

[0444] Optionally, the number of transmission resources of the terminal is authorized by any one of DCI indication, SCI indication, higher layer indication and configuration authorization, and the number of transmission resources is at most two;

[0445] Optionally, the maximum time interval of the transmission resources is 15 time units.

[0446] Optionally, when any one of the higher layer indication, DCI indication, and SCI indication indicates three transmission resources, the control information indicates two of the three transmission resources.

[0447] Optionally, the two transmission resources indicated by the control information satisfy at least one of the following:

[0448] Any two of the three transport resources;

[0449] Of the three transmission resources, the two with the earlier or later time-domain location;

[0450] Of the three transmission resources, the two that are closer or farther apart in the time domain.

[0451] In this embodiment, the terminal selects resources by obtaining the corresponding resource reservation information. By defining the relevant rules for resource selection of NR terminal and LTE terminal, the NR terminal and LTE terminal can coexist on the same frequency. This ensures that the NR terminal can communicate normally on the coexisting frequency band, while not affecting the overall performance of the LTE terminal, thereby improving the communication efficiency of the side link communication system.

[0452] This application also provides a readable storage medium storing a program or instructions. When the program or instructions are executed by a processor, they implement the various processes of the above-described resource selection method embodiments and achieve the same technical effects. To avoid repetition, they will not be described again here.

[0453] The processor mentioned above is the processor in the terminal described in the above embodiments. The readable storage medium includes computer-readable storage media, such as computer read-only memory (ROM), random access memory (RAM), magnetic disk, or optical disk.

[0454] This application embodiment also provides a chip, which includes a processor and a communication interface. The communication interface is coupled to the processor. The processor is used to run programs or instructions to implement the various processes of the above resource selection method embodiments and can achieve the same technical effect. To avoid repetition, it will not be described again here.

[0455] It should be understood that the chip mentioned in the embodiments of this application may also be referred to as a system-on-a-chip, system chip, chip system, or system-on-a-chip, etc.

[0456] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element. Furthermore, it should be noted that the scope of the methods and apparatuses in the embodiments of this application is not limited to performing functions in the order shown or discussed, but may also include performing functions substantially simultaneously or in the reverse order, depending on the functions involved. For example, the described methods may be performed in a different order than described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

[0457] Through the above description of the embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of software plus necessary general-purpose hardware platforms. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, can be embodied in the form of a computer software product. This computer software product is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk) and includes several instructions to cause a terminal (which may be a mobile phone, computer, server, air conditioner, or network device, etc.) to execute the methods described in the various embodiments of this application.

[0458] The embodiments of this application have been described above with reference to the accompanying drawings. However, this application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. A resource selection method, characterized in that, include: The terminal obtains resource reservation information; The terminal selects resources based on the resource reservation information; The acquisition of resource reservation information includes: Resource reservation information is obtained from the resource reservation indication field of the third control information, wherein the third control information is the control information of the second type of terminal; In the case where the terminal is an NR terminal, the second type of terminal is an LTE terminal.

2. The method according to claim 1, characterized in that, The resource reservation information includes at least one of the following: the priority of the data packet, the period value of the first resource reservation method, the time domain resources reserved by the second resource reservation method, the frequency domain resources reserved by the second resource reservation method, the time domain resources of the first transmission method, the time domain resources of different hybrid automatic repeat request (HARQ) processes corresponding to the same transport block (TB), and the frequency domain resources of different HARQ processes corresponding to the same TB.

3. The method according to claim 1, characterized in that, The acquisition of resource reservation information also includes at least one of the following: Resource reservation information is obtained from the resource reservation indication field of the first control information, wherein the first control information is the control information of the first type of terminal; Resource reservation information is obtained from the resource reservation indication field of the second control information, where the second control information is the control information of the first type of terminal. When the second resource reservation mode and / or resource selection mode of the terminal is the first preset mode, the resource reservation information is obtained from the HARQ association indication information in the first control information, or the resource reservation information is obtained from the HARQ association indication information in the second control information; When the second resource reservation mode and / or resource selection mode of the terminal is the second preset mode, resource reservation information is obtained from the resource reservation indication field in the second control information; When the terminal adopts the first transmission mode and the second resource reservation mode, the resource reservation information is obtained from the resource reservation indication field of the second control information and the time interval indication field between the initial transmission and retransmission in the first control information.

4. The method according to claim 3, characterized in that, The first preset method is determined by at least one of the following: protocol predefinition, preconfiguration, configuration, and indication; And / or, The second preset method is determined by at least one of the following: protocol predefinition, preconfiguration, configuration, and indication.

5. The method according to claim 3, characterized in that, Under the first preset mode, the terminal satisfies at least one of the following: The TB transmitted by the terminal is associated with N HARQ processes, where N is a positive integer; The time interval between the reserved resources in the second resource reservation method and the resources transmitted in the first transmission method is the data processing time of the terminal or the physical sidelink feedback channel PSFCH transmission processing time. When the terminal is the second type of terminal, resource reservation information is determined and resource exclusion is performed by detecting the first control information of each HARQ of the second type of terminal and the first type of terminal.

6. The method according to claim 5, characterized in that, The value of N satisfies at least one of the following: Determined by at least one of the following: protocol predefined, configuration, configuration, Radio Resource Control (RRC) indication, Media Access Control (MAC) CE indication, Downlink Control Information (DCI) indication, and Sidelink Control Information (SCI) indication; It is related to at least one of the following: channel occupancy rate, channel busy rate, maximum number of retransmissions, conversion type, number of receiving terminals, and maximum number of HARQ processes.

7. The method according to claim 5, characterized in that, In addition to the terminal satisfying the requirement of transmitting TB associated with N HARQ processes, the terminal also satisfies at least one of the following: Select M×N candidate resources, where M is 1 or 2; Send association indication information, which is used to indicate that the reserved resources of Q HARQ processes are the same TB of reserved resources, where Q is a positive integer less than or equal to N.

8. The method according to claim 7, characterized in that, The associated indication information is achieved through at least one of the following: In the reserved bits of the first control information, a HARQ process association indication field is sent to indicate at least one of the time domain resources and frequency domain resources of the Q HARQ process reserved resources; The second control information sends a HARQ process association indication field, indicating at least one of the time domain resources and frequency domain resources reserved by the Q HARQ processes; When the second control information is in the first information format, the time domain resource indication field in the second control information indicates the time domain resources reserved by two or three HARQ processes, and / or the frequency domain resource indication field in the first control information indicates the frequency domain resources reserved by two or three HARQ processes.

9. The method according to claim 8, characterized in that, When the HARQ process association indication field is sent in the reserved bits of the first control information, the value of Q is related to at least one of the following: the number of remaining reserved bits of the first control information, the channel occupancy rate, the channel busy rate, the maximum number of retransmissions, the conversion type, the number of receiving terminals, and the maximum number of HARQ processes. or, When the HARQ process association indication field is sent in the second control information, the value of Q is related to at least one of the following: the number of bits in the second control information, the number of free bits in the second control information, the channel occupancy rate, the channel busy rate, the maximum number of retransmissions, the conversion type, the number of receiving terminals, and the maximum number of HARQ processes.

10. The method according to claim 3, characterized in that, Under the second preset mode, the terminal satisfies at least one of the following: The time-domain and frequency-domain resources of the first reserved resource are determined by the time-domain and frequency-domain reservation indication fields of the second control information; The time interval between the reserved resources in the second resource reservation method and the resources transmitted in the first transmission method is the data processing time of the terminal or the PSFCH transmission processing time.

11. The method according to claim 1, characterized in that, The resource selection process includes at least one of the following: Based on the resource reservation information, resources that meet the preset conditions are excluded from the resource candidate set; Set the preset RSRP threshold for the first type of terminal to be different from the preset RSRP threshold for the second type of terminal. Change the priority of data transmission from the second type of terminal; Change the RSRP associated with the second type of terminal obtained from the measurement.

12. The method according to claim 11, characterized in that, The preset conditions include at least one of the following: The resource where the resource reservation information is located at least partially overlaps with the resources and / or reserved resources in the resource candidate set, and the measured RSRP is greater than the preset RSRP threshold. The reserved resources indicated by the resource reservation information at least partially overlap with the resources and / or reserved resources in the resource candidate set, and the measured RSRP is greater than a preset RSRP threshold. The resource reservation information is located in a resource that at least partially overlaps with the resources and / or reserved resources in the resource candidate set; The reserved resources indicated by the resource reservation information at least partially overlap with the resources and / or reserved resources in the resource candidate set.

13. The method according to claim 1, characterized in that, The resource selection process includes: Initialize the resource candidate set.

14. The method according to claim 13, characterized in that, The resource candidate set is initialized to obtain at least one of the following: At least some of the candidate resources in the resource selection window; The resource selection window contains at least a portion of the candidate resources after removing unmonitored resources and the reserved resources of the unmonitored resources; Empty set.

15. The method according to claim 1, characterized in that, The resource selection process includes: Obtain the measured RSRP.

16. The method according to claim 15, characterized in that, The acquisition of the measured RSRP includes: The measured RSRP is obtained based on the demodulated reference signal DMRS mode.

17. The method according to claim 16, characterized in that, The RSRP measured based on DMRS mode includes at least one of the following: The DMRS mode is determined based on the first information, and the measured RSRP is obtained based on the DMRS mode; The measured RSRP is obtained based on the DMRS transmitted on the target antenna port, which is the antenna port indicated by the first control information.

18. The method according to claim 17, characterized in that, The first information includes at least one of the following: control information format, resource where the control information is located, type of received signal, type information of the terminal, relevant indication field of the DMRS mode, version information of the DMRS mode, and resource allocation method of the DMRS mode.

19. The method according to claim 15, characterized in that, When the terminal is a type II terminal, the measured RSRP value is the average or weighted average of the values ​​measured on the Physical Sidelink Control Channel (PSCCH) and the Physical Sidelink Shared Channel (PSSCH).

20. The method according to claim 11, characterized in that, The resource selection process includes: Based on the Received Signal Strength Indication (RSSI) measurement results, the resources in the resource candidate set that have been excluded from resource selection are sorted.

21. The method according to claim 1, characterized in that, After the terminal selects resources based on the resource reservation information, the method further includes: The terminal indicates resource reservation information based on the selected resource.

22. The method according to claim 21, characterized in that, The method further includes: The terminal sets the reserved period indication field in the first control information or the second control information to a period reserved value.

23. The method according to claim 21, characterized in that, If the second resource reservation method and / or resource selection method of the terminal is the first preset method, the terminal satisfies at least one of the following: The transmitted TB is associated with N HARQ processes, where N is a positive integer; The time interval between the reserved resources of the first resource reservation method and / or the second resource reservation method and the resources of the first transmission method is greater than a first time, where the first time is the data processing time and / or PSFCH transmission processing time of the terminal; When the terminal is a type 2 terminal, resource reservation information is obtained by detecting the first control information of each HARQ of the type 2 terminal and the type 1 terminal, and resource exclusion is performed. or, If the second resource reservation method and / or resource selection method of the terminal is a second preset method, the terminal satisfies at least one of the following: The time-domain and frequency-domain resources reserved by the second resource reservation method are indicated by the time-domain reservation indication field and the frequency-domain reservation indication field of the second control information; The time interval between the reserved resources in the second resource reservation method and the resources transmitted in the first transmission method is greater than a first time, where the first time is the data processing time of the terminal or the PSFCH transmission processing time.

24. The method according to claim 1, characterized in that, The method further includes: The terminal performs re-evaluation and / or resource preemption detection.

25. The method according to claim 24, characterized in that, The reassessment and / or resource preemption detection includes at least one of the following: If the selected resource overlaps with the resource indicated by the third control information and / or the indicated retransmission resource, the terminal performs resource reselection; Set the preset RSRP threshold for the first type of terminal to be different from the preset RSRP threshold for the second type of terminal. No preset RSRP threshold is set for reserved resources for the second type of terminal; Change the priority of data transmission and / or reserved resources for the second type of terminal; Priority comparison is not performed on the data transmitted and / or reserved resources of the second type of terminal.

26. The method according to claim 1, characterized in that, The method further includes: The terminal reports detection information and / or candidate resource sets to the network-side device.

27. The method according to claim 26, characterized in that, The terminal reports detection information and / or a set of candidate resources to the network-side device, including at least one of the following: The terminal reports the reserved resources of the detected second type of terminal to the network-side device; The terminal reports a set of candidate resources to the network-side device after excluding the reserved resources of the second type of terminal.

28. The method according to claim 1, characterized in that, When the terminal is a type II terminal, obtaining resource reservation information includes at least one of the following: Periodic reservation information is obtained from the resource reservation indication field of the first control information, wherein the first control information is the control information of the first type of terminal; The reserved information for the first transmission mode is obtained from the time interval indication field between the initial transmission and the retransmission.

29. The method according to claim 1, characterized in that, When the terminal is a type II terminal, the method further includes: The terminal performs resource exclusion based on resource collision and RSSI measurement sorting.

30. The method according to claim 1, characterized in that, When the terminal selects resources, the resource detection time period of the terminal is located in ( Within the range; Where n is the time at which resource selection is triggered. The time length of the detection window for high-level indication is a related variable. Parameters that are predefined for the protocol or preconfigured or configured for the network.

31. The method according to claim 1, characterized in that, The reserved period set for the first type of terminal is determined by at least one of the following: protocol predefinition, preconfiguration, and configuration.

32. The method according to claim 1, characterized in that, The number of transmission resources for the terminal is authorized through any one of DCI indication, SCI indication, higher layer indication, and configuration authorization, and the number of transmission resources is at most two.

33. The method according to claim 32, characterized in that, The maximum time interval of the transmission resources is 15 time units.

34. The method according to claim 1, characterized in that, When any one of the higher-level indication, DCI indication, and SCI indication indicates three transmission resources, the control information indicates two of the three transmission resources.

35. The method according to claim 34, characterized in that, The two transmission resources indicated by the control information satisfy at least one of the following: Any two of the three transport resources; Of the three transmission resources, the two with the earlier or later time-domain location; Of the three transmission resources, the two that are closer or farther apart in the time domain.

36. A resource selection device, characterized in that, include: The acquisition module is used to obtain resource reservation information; The resource selection module is used to select resources based on the resource reservation information; The acquisition module is configured to: acquire resource reservation information from the resource reservation indication field of the third control information, wherein the third control information is the control information of the second type of terminal; In the case where the device is applied to an NR terminal, the second type of terminal is an LTE terminal.

37. A terminal, characterized in that, It includes a processor, a memory, and a program or instructions stored in the memory and executable on the processor, wherein the program or instructions, when executed by the processor, implement the steps of the resource selection method as described in any one of claims 1 to 35.

38. A readable storage medium, characterized in that, The readable storage medium stores a program or instructions that, when executed by a processor, implement the steps of the resource selection method as described in any one of claims 1 to 35.

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