A resource conflict indication method, device and computer readable storage medium

Abstract

This invention provides a resource conflict indication method, apparatus, and computer-readable storage medium. The method includes: a first terminal sending indication information through a physical side link feedback channel (PSFCH), the indication information indicating conflict information of a resource selected by a second terminal, wherein the conflict information includes at least one of the following: a resource conflict exists in the periodically reserved resources of the second terminal; a resource conflict exists in the retransmission resources of the second terminal; a resource conflict exists in both the retransmission resources and the periodically reserved resources of the second terminal; the selected resource of the second terminal conflicts with a transmission time slot or transmission subchannel of multicast transmission.

Description

Technical Field

[0001] This invention relates to the field of mobile communication technology, and in particular to a resource conflict indication method, apparatus, and computer-readable storage medium. Background Technology

[0002] NR V2X supports two resource allocation modes: Mode-1 and Mode-2. Mode-1 is a base station-controlled resource allocation mode, while Mode-2 is a terminal-autonomous resource allocation mode. Regarding solutions to improve Mode-2 reliability for UE interaction information, while considering that a single side-link control information (SCI) can reserve periodic transmission resources and up to two retransmission resources, the method for using PSFC for conflict indication is not discussed.

[0003] Furthermore, for multicast transmission methods, there are ACK / NACK-based feedback methods and NACK-only feedback methods. In the NACK-only method, if two terminals can multicast and both need to receive each other's multicast data, and if their broadcast transmission resources are in the same time slot, even if they haven't chosen overlapping sub-channels, due to the half-duplex nature of the terminals, they cannot send and receive simultaneously, resulting in neither terminal detecting the other's multicast data. However, because the NACK-only method is used, they cannot detect each other and therefore will not send a NACK response. The sending end will then assume the receiving end has correctly detected the data, causing the multicast data to fail to be received by the receiving end. Summary of the Invention

[0004] In view of this, embodiments of the present invention aim to provide a resource conflict indication method, apparatus, and computer-readable storage medium.

[0005] To achieve the above objectives, the technical solution of this invention is implemented as follows:

[0006] This invention provides a resource conflict indication method, which is applied to a first terminal and includes:

[0007] Indication information is transmitted via the Physical Side Link Feedback Channel (PSFCH). This indication information is used to indicate conflict information regarding the resources selected by the second terminal. The conflict information includes at least one of the following:

[0008] There are resource conflicts in the periodic reserved resources of the second terminal;

[0009] There is a resource conflict in the retransmission resources of the second terminal;

[0010] There is a resource conflict between the retransmission resources of the second terminal and the periodically reserved resources;

[0011] The resources selected by the second terminal conflict with the transmission time slot or transmission sub-channel of the multicast transmission.

[0012] The selected resources of the second terminal are carried by the side link control information (SCI).

[0013] Among them, the periodically reserved resources are subject to resource conflicts, including:

[0014] Periodically reserved resources lead to continuous resource conflicts;

[0015] Periodically reserved resources may result in a single resource conflict.

[0016] Among them, the retransmission resources are subject to resource conflicts, including:

[0017] The first retransmission of resources resulted in a resource conflict.

[0018] The second retransmission encountered a resource conflict.

[0019] Optionally, the method further includes:

[0020] Determine the PSFCH resource from which the instruction information is sent.

[0021] The PSFCH resource used to send the indication information is different from the resource used in the PSFCH Hybrid Automatic Repeat Request (HARQ) feedback.

[0022] Optionally, the method further includes:

[0023] The collision information is carried through the PSFCH transmission resource.

[0024] The PSFCH resource for determining the transmission of the indication information includes:

[0025] Determine the number of PSFCH resources used to multiplex collision information indications during PSFCH transmission;

[0026] The PSFCH resource for sending the indication information is determined based on the number of resources and the conflict type, or the PSFCH resource for sending the indication information is determined based on the number of resources, the conflict type, and the source ID of the second terminal.

[0027] The PSFCH resource for determining the transmission of the indication information includes:

[0028] Determine the number of PSFCH resources used to multiplex collision information indications during PSFCH transmission;

[0029] The PSFCH resource for sending the indication information is determined based on the number of resources and the multicast target ID; or, the PSFCH resource for sending the indication information is determined based on the number of resources, the multicast target ID, and the source ID of the second terminal; or, the PSFCH resource for sending the indication information is determined based on the number of resources, the multicast target ID, the conflicting multicast or unicast source ID, and the source ID of the second terminal.

[0030] Optionally, before determining the number of resources used to multiplex the PSFCH indicated by the collision information in the PSFCH transmission, the method further includes:

[0031] The PSFCH resources used for multiplexing collision information indication in the determined PSFCH transmission are divided into two parts: one part is used to indicate that there is a collision in the sub-channel of the transmission, and the other part is used to indicate that there is a time slot collision.

[0032] Within the corresponding portion of the allocated resources, determine the PSFCH resource for sending the indication information.

[0033] This invention also provides a resource conflict indication method, which is applied to a second terminal and includes:

[0034] The indication information is received through the physical side link feedback channel PSFCH, and the indication information is used to indicate the conflict information of the resource selected by the second terminal.

[0035] Resource reselection is performed based on the indicated information; wherein...

[0036] The conflict information includes at least one of the following:

[0037] There are resource conflicts in the periodic reserved resources of the second terminal;

[0038] There is a resource conflict in the retransmission resources of the second terminal;

[0039] There is a resource conflict between the retransmission resources of the second terminal and the periodically reserved resources;

[0040] The resources selected by the second terminal conflict with the transmission time slot or transmission sub-channel of the multicast transmission.

[0041] The selected resources of the second terminal are carried by the side link control information (SCI).

[0042] The PSFCH resource carrying the indication information is different from the resource fed back by the PSFCH Hybrid Automatic Repeat Request (HARQ).

[0043] The PSFCH resource carrying the indication information is determined by a combination of the following information:

[0044] The number of PSFCH resources used to multiplex collision information in PSFCH transmission, and the collision type; or...

[0045] The PSFCH transmission uses the number of PSFCH resources, the collision type, and the source ID of the second terminal to indicate the collision information.

[0046] The PSFCH resource carrying the indication information is determined by any of the following information combinations:

[0047] The number of PSFCH resources used to multiplex collision information in PSFCH transmission, and the multicast target ID;

[0048] The PSFCH resource number, multicast target ID, and source ID of the second terminal are used in PSFCH transmission to multiplex collision information indications.

[0049] The PSFCH transmission uses the number of PSFCH resources indicated by the collision information, the multicast target ID, the source ID of the conflicting multicast or unicast, and the source ID of the second terminal.

[0050] This invention also provides a resource conflict indication device, which is applied to a first terminal and includes:

[0051] The transmitting module is configured to transmit indication information via the Physical Side Link Feedback Channel (PSFCH), the indication information being used to indicate conflict information existing in the resource selected by the second terminal, wherein the conflict information includes at least one of the following:

[0052] There are resource conflicts in the periodic reserved resources of the second terminal;

[0053] There is a resource conflict in the retransmission resources of the second terminal;

[0054] There is a resource conflict between the retransmission resources of the second terminal and the periodically reserved resources;

[0055] The resources selected by the second terminal conflict with the transmission time slot or transmission sub-channel of the multicast transmission.

[0056] This invention also provides a resource conflict indication device, which is applied to a second terminal and includes:

[0057] The receiving module is used to receive indication information through the physical side link feedback channel PSFCH, the indication information being used to indicate conflict information of the resources selected by the second terminal;

[0058] The processing module is used to perform resource reselection based on the indication information; wherein,

[0059] The conflict information includes at least one of the following:

[0060] There are resource conflicts in the periodic reserved resources of the second terminal;

[0061] There is a resource conflict in the retransmission resources of the second terminal;

[0062] There is a resource conflict between the retransmission resources of the second terminal and the periodically reserved resources;

[0063] The resources selected by the second terminal conflict with the transmission time slot or transmission sub-channel of the multicast transmission.

[0064] This invention also provides a resource conflict indication device, which includes: a processor and a memory for storing a computer program capable of running on the processor.

[0065] When the processor runs the computer program, it executes the steps of the above method.

[0066] This invention also provides a computer-readable storage medium storing a computer program thereon, which, when executed by a processor, implements the steps of the above-described method.

[0067] The resource conflict indication method, apparatus, and computer-readable storage medium provided in this invention embodiment include a first terminal transmitting indication information via the Physical Side Link Feedback Channel (PSFCH). This indication information indicates conflict information for resources selected by a second terminal. The conflict information includes at least one of the following: resource conflict exists in the second terminal's periodically reserved resources; resource conflict exists in the second terminal's retransmission resources; resource conflict exists in both the second terminal's retransmission resources and periodically reserved resources; or the selected resource of the second terminal conflicts with a multicast transmission time slot or transmission subchannel. This invention embodiment indicates specific resource conflict types via the PSFCH, assisting the terminal in determining whether and how to perform resource reselection, thereby improving transmission reliability. Attached Figure Description

[0068] Figure 1 This is a schematic flowchart of the resource conflict indication method according to an embodiment of the present invention. Figure 1 ;

[0069] Figure 2 This is a schematic flowchart of the resource conflict indication method according to an embodiment of the present invention. Figure 2 ;

[0070] Figure 3 This is a schematic diagram of the resource conflict indication device according to an embodiment of the present invention. Figure 1 ;

[0071] Figure 4 This is a schematic diagram of the resource conflict indication device according to an embodiment of the present invention. Figure 2 . Detailed Implementation

[0072] The present invention will now be described in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, only the parts relevant to the invention are shown in the accompanying drawings. It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present application will now be described in detail with reference to the accompanying drawings and embodiments.

[0073] This invention provides a resource conflict indication method, such as... Figure 1 As shown, the method is applied to the first terminal and includes:

[0074] Step 101: Send indication information through the Physical Side Link Feedback Channel (PSFCH). The indication information is used to indicate the conflict information of the resource selected by the second terminal, wherein the conflict information includes at least one of the following:

[0075] There are resource conflicts in the periodic reserved resources of the second terminal;

[0076] There is a resource conflict in the retransmission resources of the second terminal;

[0077] There is a resource conflict between the retransmission resources of the second terminal and the periodically reserved resources;

[0078] The resources selected by the second terminal conflict with the transmission time slot or transmission sub-channel of the multicast transmission.

[0079] Here, the indication information can be indicated by the PSFCH channel itself; that is, if PSFCH information is detected, it indicates that a collision exists.

[0080] In this embodiment of the invention, the selected resources of the second terminal are carried by the side link control information (SCI).

[0081] That is, the second terminal indicates the resource it selects through SCI, and the source ID information is carried in the SCI.

[0082] In this embodiment of the invention, the periodic reserved resources are subject to resource conflicts, including:

[0083] Periodically reserved resources lead to continuous resource conflicts;

[0084] Periodically reserved resources may result in a single resource conflict.

[0085] In this embodiment of the invention, the retransmission resource is subject to resource conflict, including:

[0086] The first retransmission of resources resulted in a resource conflict.

[0087] The second retransmission encountered a resource conflict.

[0088] In embodiments of the present invention, such as Figure 1 As shown, the method also includes:

[0089] Step 100: Determine the PSFCH resource for sending the indication information.

[0090] In this embodiment of the invention, the PSFCH resource for sending the indication information is different from the resource for the PSFCH Hybrid Automatic Repeat Request (HARQ) feedback.

[0091] In this embodiment of the invention, the method further includes:

[0092] The collision information is carried through the PSFCH transmission resource.

[0093] In this embodiment of the invention, determining the PSFCH resource for sending the indication information includes:

[0094] Determine the number of PSFCH resources used to multiplex collision information indications during PSFCH transmission;

[0095] The PSFCH resource for sending the indication information is determined based on the number of resources and the conflict type, or the PSFCH resource for sending the indication information is determined based on the number of resources, the conflict type, and the source ID of the second terminal.

[0096] In this embodiment of the invention, determining the PSFCH resource for sending the indication information includes:

[0097] Determine the number of PSFCH resources used to multiplex collision information indications during PSFCH transmission;

[0098] The PSFCH resource for sending the indication information is determined based on the number of resources and the multicast target ID; or, the PSFCH resource for sending the indication information is determined based on the number of resources, the multicast target ID, and the source ID of the second terminal; or, the PSFCH resource for sending the indication information is determined based on the number of resources, the multicast target ID, the conflicting multicast or unicast source ID, and the source ID of the second terminal.

[0099] In this embodiment of the invention, before determining the number of resources used to multiplex the PSFCH indicated by the collision information in the PSFCH transmission, the method further includes:

[0100] The PSFCH resources used for multiplexing collision information indication in the determined PSFCH transmission are divided into two parts: one part is used to indicate that there is a collision in the sub-channel of the transmission, and the other part is used to indicate that there is a time slot collision.

[0101] Within the corresponding portion of the allocated resources, determine the PSFCH resource for sending the indication information.

[0102] This invention also provides a resource conflict indication method, such as... Figure 2 As shown, the method is applied to a second terminal and includes:

[0103] Step 201: Receive indication information through the physical side link feedback channel PSFCH, the indication information being used to indicate conflict information of the resources selected by the second terminal;

[0104] Step 202: Perform resource reselection based on the indicated information; wherein,

[0105] The conflict information includes at least one of the following:

[0106] There are resource conflicts in the periodic reserved resources of the second terminal;

[0107] There is a resource conflict in the retransmission resources of the second terminal;

[0108] There is a resource conflict between the retransmission resources of the second terminal and the periodically reserved resources;

[0109] The resources selected by the second terminal conflict with the transmission time slot or transmission sub-channel of the multicast transmission.

[0110] In this embodiment of the invention, the selected resources of the second terminal are carried by the side link control information (SCI).

[0111] In this embodiment of the invention, the PSFCH resource carrying the indication information is different from the resource fed back by the PSFCH Hybrid Automatic Repeat Request (HARQ).

[0112] In this embodiment of the invention, the PSFCH resource carrying the indication information is determined by a combination of the following information:

[0113] The number of PSFCH resources used to multiplex collision information in PSFCH transmission, and the collision type; or...

[0114] The PSFCH transmission uses the number of PSFCH resources, the collision type, and the source ID of the second terminal to indicate the collision information.

[0115] In this embodiment of the invention, the PSFCH resource carrying the indication information is determined by any of the following information combinations:

[0116] The number of PSFCH resources used to multiplex collision information in PSFCH transmission, and the multicast target ID;

[0117] The number of PSFCH resources used in PSFCH transmission to multiplex collision information, the target ID of the multicast, and the source ID of the second terminal;

[0118] The PSFCH transmission uses the number of PSFCH resources indicated by the collision information, the multicast target ID, the source ID of the conflicting multicast or unicast, and the source ID of the second terminal.

[0119] To implement the above method embodiments, this invention also provides a resource conflict indication device, such as... Figure 3 As shown, the device is applied to a first terminal and includes:

[0120] Transmission module 301 is configured to transmit indication information via the physical side link feedback channel PSFCH, the indication information being used to indicate conflict information existing in the resource selected by the second terminal, wherein the conflict information includes at least one of the following:

[0121] There are resource conflicts in the periodic reserved resources of the second terminal;

[0122] There is a resource conflict in the retransmission resources of the second terminal;

[0123] There is a resource conflict between the retransmission resources of the second terminal and the periodically reserved resources;

[0124] The resources selected by the second terminal conflict with the transmission time slot or transmission sub-channel of the multicast transmission.

[0125] In this embodiment of the invention, the selected resources of the second terminal are carried by the side link control information (SCI).

[0126] In this embodiment of the invention, the periodic reserved resources are subject to resource conflicts, including:

[0127] Periodically reserved resources lead to continuous resource conflicts;

[0128] Periodically reserved resources may result in a single resource conflict.

[0129] In this embodiment of the invention, the retransmission resource is subject to resource conflict, including:

[0130] The first retransmission of resources resulted in a resource conflict.

[0131] The second retransmission encountered a resource conflict.

[0132] In embodiments of the present invention, such as Figure 3 As shown, the device also includes:

[0133] The determination module 300 is used to determine the PSFCH resource for sending the indication information.

[0134] In this embodiment of the invention, the PSFCH resource for sending the indication information is different from the resource for the PSFCH Hybrid Automatic Repeat Request (HARQ) feedback.

[0135] In this embodiment of the invention, the sending module 301 is further configured to carry the conflict information through the sending resources of the PSFCH.

[0136] In this embodiment of the invention, the determining module 300 determines the PSFCH resource for sending the indication information, including:

[0137] Determine the number of PSFCH resources used to multiplex collision information indications during PSFCH transmission;

[0138] The PSFCH resource for sending the indication information is determined based on the number of resources and the conflict type, or the PSFCH resource for sending the indication information is determined based on the number of resources, the conflict type, and the source ID of the second terminal.

[0139] In this embodiment of the invention, the determining module 300 determines the PSFCH resource for sending the indication information, including:

[0140] Determine the number of PSFCH resources used to multiplex collision information indications during PSFCH transmission;

[0141] The PSFCH resource for sending the indication information is determined based on the number of resources and the multicast target ID; or, the PSFCH resource for sending the indication information is determined based on the number of resources, the multicast target ID, and the source ID of the second terminal; or, the PSFCH resource for sending the indication information is determined based on the number of resources, the multicast target ID, the conflicting multicast or unicast source ID, and the source ID of the second terminal.

[0142] In this embodiment of the invention, before the determining module 300 determines the number of resources used to multiplex the PSFCH indicated by the collision information in the PSFCH transmission, it is further used to...

[0143] The PSFCH resources used for multiplexing collision information indication in the determined PSFCH transmission are divided into two parts: one part is used to indicate that there is a collision in the sub-channel of the transmission, and the other part is used to indicate that there is a time slot collision.

[0144] Within the corresponding portion of the allocated resources, determine the PSFCH resource for sending the indication information.

[0145] This invention also provides a resource conflict indication device, such as... Figure 4 As shown, the device is applied to a second terminal and includes:

[0146] The receiving module 401 is used to receive indication information through the physical side link feedback channel PSFCH, the indication information being used to indicate conflict information of the resource selected by the second terminal;

[0147] Processing module 402 is used to perform resource reselection based on the indication information; wherein,

[0148] The conflict information includes at least one of the following:

[0149] There are resource conflicts in the periodic reserved resources of the second terminal;

[0150] There is a resource conflict in the retransmission resources of the second terminal;

[0151] There is a resource conflict between the retransmission resources of the second terminal and the periodically reserved resources;

[0152] The resources selected by the second terminal conflict with the transmission time slot or transmission sub-channel of the multicast transmission.

[0153] In this embodiment of the invention, the selected resources of the second terminal are carried by the side link control information (SCI).

[0154] In this embodiment of the invention, the PSFCH resource carrying the indication information is different from the resource fed back by the PSFCH Hybrid Automatic Repeat Request (HARQ).

[0155] In this embodiment of the invention, the PSFCH resource carrying the indication information is determined by a combination of the following information:

[0156] The number of PSFCH resources used to multiplex collision information in PSFCH transmission, and the collision type; or...

[0157] The PSFCH transmission uses the number of PSFCH resources, the collision type, and the source ID of the second terminal to indicate the collision information.

[0158] In this embodiment of the invention, the PSFCH resource carrying the indication information is determined by any of the following information combinations:

[0159] The number of PSFCH resources used to multiplex collision information in PSFCH transmission, and the multicast target ID;

[0160] The PSFCH resource number, multicast target ID, and source ID of the second terminal are used in PSFCH transmission to multiplex collision information indications.

[0161] The PSFCH transmission uses the number of PSFCH resources indicated by the collision information, the multicast target ID, the source ID of the conflicting multicast or unicast, and the source ID of the second terminal.

[0162] This invention also provides a resource conflict indication device, which includes: a processor and a memory for storing a computer program capable of running on the processor.

[0163] When the processor runs the computer program, it performs the following:

[0164] Indication information is transmitted via the Physical Side Link Feedback Channel (PSFCH). This indication information is used to indicate conflict information regarding the resources selected by the second terminal. The conflict information includes at least one of the following:

[0165] There are resource conflicts in the periodic reserved resources of the second terminal;

[0166] There is a resource conflict in the retransmission resources of the second terminal;

[0167] There is a resource conflict between the retransmission resources of the second terminal and the periodically reserved resources;

[0168] The resources selected by the second terminal conflict with the transmission time slot or transmission sub-channel of the multicast transmission.

[0169] The selected resources of the second terminal are carried by the side link control information (SCI).

[0170] Among them, the periodically reserved resources are subject to resource conflicts, including:

[0171] Periodically reserved resources lead to continuous resource conflicts;

[0172] Periodically reserved resources may result in a single resource conflict.

[0173] Among them, the retransmission resources are subject to resource conflicts, including:

[0174] The first retransmission of resources resulted in a resource conflict.

[0175] The second retransmission encountered a resource conflict.

[0176] The processor is also configured to, when running the computer program, perform:

[0177] Determine the PSFCH resource from which the instruction information is sent.

[0178] The PSFCH resource used to send the indication information is different from the resource used in the PSFCH Hybrid Automatic Repeat Request (HARQ) feedback.

[0179] The processor is also configured to, when running the computer program, perform:

[0180] The collision information is carried through the PSFCH transmission resource.

[0181] When determining the PSFCH resource for sending the indication information, the processor is also configured to execute the following when running the computer program:

[0182] Determine the number of PSFCH resources used to multiplex collision information indications during PSFCH transmission;

[0183] The PSFCH resource for sending the indication information is determined based on the number of resources and the conflict type, or the PSFCH resource for sending the indication information is determined based on the number of resources, the conflict type, and the source ID of the second terminal.

[0184] When determining the PSFCH resource for sending the indication information, the processor is also configured to execute the following when running the computer program:

[0185] Determine the number of PSFCH resources used to multiplex collision information indications during PSFCH transmission;

[0186] The PSFCH resource for sending the indication information is determined based on the number of resources and the multicast target ID; or, the PSFCH resource for sending the indication information is determined based on the number of resources, the multicast target ID, and the source ID of the second terminal; or, the PSFCH resource for sending the indication information is determined based on the number of resources, the multicast target ID, the conflicting multicast or unicast source ID, and the source ID of the second terminal.

[0187] Before determining the number of PSFCH resources used to reuse collision information indications in PSFCH transmission, the processor is also configured to execute the following when running the computer program:

[0188] The PSFCH resources used for multiplexing collision information indication in the determined PSFCH transmission are divided into two parts: one part is used to indicate that there is a collision in the sub-channel of the transmission, and the other part is used to indicate that there is a time slot collision.

[0189] Within the corresponding portion of the allocated resources, determine the PSFCH resource for sending the indication information.

[0190] This invention also provides a resource conflict indication device, which includes: a processor and a memory for storing a computer program capable of running on the processor.

[0191] When the processor runs the computer program, it performs the following:

[0192] The indication information is received through the physical side link feedback channel PSFCH, and the indication information is used to indicate the conflict information of the resource selected by the second terminal.

[0193] Resource reselection is performed based on the indicated information; wherein...

[0194] The conflict information includes at least one of the following:

[0195] There are resource conflicts in the periodic reserved resources of the second terminal;

[0196] There is a resource conflict in the retransmission resources of the second terminal;

[0197] There is a resource conflict between the retransmission resources of the second terminal and the periodically reserved resources;

[0198] The resources selected by the second terminal conflict with the transmission time slot or transmission sub-channel of the multicast transmission.

[0199] The selected resources of the second terminal are carried by the side link control information (SCI).

[0200] The PSFCH resource carrying the indication information is different from the resource fed back by the PSFCH Hybrid Automatic Repeat Request (HARQ).

[0201] The PSFCH resource carrying the indication information is determined by a combination of the following information:

[0202] The number of PSFCH resources used to multiplex collision information in PSFCH transmission, and the collision type; or...

[0203] The PSFCH transmission uses the number of PSFCH resources, the collision type, and the source ID of the second terminal to indicate the collision information.

[0204] The PSFCH resource carrying the indication information is determined by any of the following information combinations:

[0205] The number of PSFCH resources used to multiplex collision information in PSFCH transmission, and the multicast target ID;

[0206] The PSFCH resource number, multicast target ID, and source ID of the second terminal are used in PSFCH transmission to multiplex collision information indications.

[0207] The PSFCH transmission uses the number of PSFCH resources indicated by the collision information, the multicast target ID, the source ID of the conflicting multicast or unicast, and the source ID of the second terminal.

[0208] It should be noted that the resource conflict indication provided in the above embodiments is only illustrated by the division of the above program modules. In practical applications, the above processing can be assigned to different program modules as needed, that is, the internal structure of the device can be divided into different program modules to complete all or part of the processing described above. In addition, the device and the corresponding method embodiments provided in the above embodiments belong to the same concept, and their specific implementation process can be found in the method embodiments, which will not be repeated here.

[0209] In an exemplary embodiment, the present invention also provides a computer-readable storage medium, which may be a memory such as FRAM, ROM, PROM, EPROM, EEPROM, Flash Memory, magnetic surface memory, optical disc, or CD-ROM; or it may be a device including one or any combination of the above-mentioned memories, such as a mobile phone, computer, tablet device, personal digital assistant, etc.

[0210] This invention also provides a computer-readable storage medium storing a computer program thereon, which, when executed by a processor, performs the following:

[0211] Indication information is transmitted via the Physical Side Link Feedback Channel (PSFCH). This indication information is used to indicate conflict information regarding the resources selected by the second terminal. The conflict information includes at least one of the following:

[0212] There are resource conflicts in the periodic reserved resources of the second terminal;

[0213] There is a resource conflict in the retransmission resources of the second terminal;

[0214] There is a resource conflict between the retransmission resources of the second terminal and the periodically reserved resources;

[0215] The resources selected by the second terminal conflict with the transmission time slot or transmission sub-channel of the multicast transmission.

[0216] The selected resources of the second terminal are carried by the side link control information (SCI).

[0217] Among them, the periodically reserved resources are subject to resource conflicts, including:

[0218] Periodically reserved resources lead to continuous resource conflicts;

[0219] Periodically reserved resources may result in a single resource conflict.

[0220] Among them, the retransmission resources are subject to resource conflicts, including:

[0221] The first retransmission of resources resulted in a resource conflict.

[0222] The second retransmission encountered a resource conflict.

[0223] When the computer program is run by the processor, it also executes:

[0224] Determine the PSFCH resource from which the instruction information is sent.

[0225] The PSFCH resource used to send the indication information is different from the resource used in the PSFCH Hybrid Automatic Repeat Request (HARQ) feedback.

[0226] When the computer program is run by the processor, it also executes:

[0227] The collision information is carried through the PSFCH transmission resource.

[0228] When determining the PSFCH resource for sending the indication information, the computer program, when executed by the processor, also performs the following:

[0229] Determine the number of PSFCH resources used to multiplex collision information indications during PSFCH transmission;

[0230] The PSFCH resource for sending the indication information is determined based on the number of resources and the conflict type, or the PSFCH resource for sending the indication information is determined based on the number of resources, the conflict type, and the source ID of the second terminal.

[0231] When determining the PSFCH resource for sending the indication information, the computer program, when executed by the processor, also performs the following:

[0232] Determine the number of PSFCH resources used to multiplex collision information indications during PSFCH transmission;

[0233] The PSFCH resource for sending the indication information is determined based on the number of resources and the multicast target ID; or, the PSFCH resource for sending the indication information is determined based on the number of resources, the multicast target ID, and the source ID of the second terminal; or, the PSFCH resource for sending the indication information is determined based on the number of resources, the multicast target ID, the conflicting multicast or unicast source ID, and the source ID of the second terminal.

[0234] Before determining the number of PSFCH resources used to reuse collision information indications in PSFCH transmission, the computer program, when executed by the processor, also performs the following:

[0235] The PSFCH resources used for multiplexing collision information indication in the determined PSFCH transmission are divided into two parts: one part is used to indicate that there is a collision in the sub-channel of the transmission, and the other part is used to indicate that there is a time slot collision.

[0236] Within the corresponding portion of the allocated resources, determine the PSFCH resource for sending the indication information.

[0237] This invention also provides a computer-readable storage medium storing a computer program thereon, which, when executed by a processor, performs the following:

[0238] The indication information is received through the physical side link feedback channel PSFCH, and the indication information is used to indicate the conflict information of the resource selected by the second terminal.

[0239] Resource reselection is performed based on the indicated information; wherein...

[0240] The conflict information includes at least one of the following:

[0241] There are resource conflicts in the periodic reserved resources of the second terminal;

[0242] There is a resource conflict in the retransmission resources of the second terminal;

[0243] There is a resource conflict between the retransmission resources of the second terminal and the periodically reserved resources;

[0244] The resources selected by the second terminal conflict with the transmission time slot or transmission sub-channel of the multicast transmission.

[0245] The selected resources of the second terminal are carried by the side link control information (SCI).

[0246] The PSFCH resource carrying the indication information is different from the resource fed back by the PSFCH Hybrid Automatic Repeat Request (HARQ).

[0247] The PSFCH resource carrying the indication information is determined by a combination of the following information:

[0248] The number of PSFCH resources used to multiplex collision information in PSFCH transmission, and the collision type; or...

[0249] The PSFCH transmission uses the number of PSFCH resources, the collision type, and the source ID of the second terminal to indicate the collision information.

[0250] The PSFCH resource carrying the indication information is determined by any of the following information combinations:

[0251] The number of PSFCH resources used to multiplex collision information in PSFCH transmission, and the multicast target ID;

[0252] The PSFCH resource number, multicast target ID, and source ID of the second terminal are used in PSFCH transmission to multiplex collision information indications.

[0253] The PSFCH transmission uses the number of PSFCH resources indicated by the collision information, the multicast target ID, the source ID of the conflicting multicast or unicast, and the source ID of the second terminal.

[0254] The present invention will now be described in conjunction with specific scenario examples.

[0255] As can be seen, NR V2X supports two resource allocation modes: Mode-1 and Mode-2. Mode-1 is a base station-controlled resource allocation mode, while Mode-2 is a terminal-autonomous resource allocation mode. Mode-2 resource allocation needs to reduce the probability of different UEs simultaneously using the same resources. Therefore, a sensing mechanism is introduced to enable the UE to select available resources. The UE monitors and obtains resource occupancy information for target resources, selecting unused or minimally interfered resources for subsequent transmission. As shown in the figure, within the sensing window, the UE monitors the SCI (Search Channel Information) to determine the occupancy status of all candidate resources within the resource selection window, and combines this with the corresponding RSRP (Resource Response Point Reference) to select an available candidate resource.

[0256] The R17 sidelink has two main objectives: energy saving and enhanced reliability and reduced latency in Mode 2. For energy saving, it incorporates some LTE-V resource awareness and V2X technologies. Regarding enhanced reliability and reduced latency, the main research focuses on achieving this through UE-A interaction. UE-A determines a resource set and sends it to UE-B. UE-B then considers the resource set provided by UE-A when selecting resources. In the current UE interaction scheme, the following two methods will be designed in the future:

[0257] Scheme 1: The resources sent by UE-A to UE-B are either preferred or non-preferred UE transmission resources; UE-B can refer to the set of resources sent by UE-A during the resource selection process.

[0258] Scheme 2: The coordination information sent by UE-A is conflict information of selected resources based on the SCI indication of UE-B, including anticipated potential conflicts or information on detected conflicts. UE-B can use the coordination information from UE-A to reselect resources, re-evaluate, or schedule retransmissions.

[0259] For Scheme 2, the current mainstream view is to carry it through the PSFCH channel.

[0260] One of the key technologies distinguishing NR V2X from LTE V2X is its support for unicast and multicast HARQ-ACK feedback for sidelinks. Sidelink HARQ-ACK is carried on the PSFCH channel. Currently, PSFCH only supports format 0, carrying only one bit, transmitted sequentially, occupying 1 RB in the frequency domain and 1 OFDM symbol in the time domain. A copy of the PSFCH is transmitted before the PSFCH symbol for AGC (Automatic Guided Collection) of the received PSFCH. In the time domain, which time slots in the resource pool are available for PSFCH is periodically indicated by the higher-layer signaling configuration parameter periodPSFCHresource. It can support one PSFCH for every {0, 1, 2, 4} SL time slots, meaning one PSFCH time slot may correspond to one, two, or four PSFCH time slots. Alternatively, there may be no PSFCH time slot; when periodPSFCHresource indicates 0, it means the sidelink HARQ-ACK feedback function is disabled.

[0261] In the frequency domain, within each PSFCH slot, the FDM-enabled PSFCH is indicated by higher-layer parameters as the possible location of the RB (Resource Block) used for transmitting the PSFCH in the frequency domain. Multiple PRBs can be configured on the OFDM symbol transmitting the PSFCH to provide more PSFCH channel resources, supporting feedback for PSSCHs in different slots and reducing conflicts between PSFCHs corresponding to different PSSCHs. Candidate PSFCH resources are determined by the index of the starting sub-channel of the associated PSSCH channel and the index of the slot. It is assumed that the resource pool contains... N PRBs are used for PSFCH transmission, totaling N subch The number of PSSCH slots associated with the same PSFCH slot in each sub-channel is less than or equal to [number]. Therefore, the PRB of sub-channel j allocated to PSSCH slot i by the UE is:

[0262]

[0263] in 0≤j <N subch The allocation is performed first in time slot i, then in sub-channel j.

[0264] The UE first determines the number of resources in the candidate PSFCH resource set used for HARQ-ACK multiplexing in a single PSFCH transmission. in It represents the number of circular shift pairs within each resource pool. This relates to the method of determining PSFCH resources:

[0265] When the resources of PSFCH are determined based on the PSSCH slot number and the starting sub-channel number,

[0266] When the resources of PSFCH are determined based on the PSSCH slot number and all sub-channels occupied by PSSCH transmission, The number of resources in the multiplexed PSFCH increases linearly with the number of sub-channels. This approach is suitable for multicast feedback, where multicast receiving UEs multiplex these resources.

[0267] The UE further determines the resources it uses to send the PSFCH. Where P ID It is the physical layer source ID carried in the SCI format 2-A or 2-B corresponding to the PSSCH transmission, M. ID The specific method varies depending on the HARQ feedback mode. When using unicast or multicast HARQ-NACK feedback, M... ID When the value is 0, M is used in multicast HARQ-ACK / NACK feedback mode. ID This is the multicast member ID of the receiving UE.

[0268] To address the problems existing in related technologies, it is necessary to be able to distinguish and indicate the types of conflicts. Simultaneously, it is also necessary to solve how to convey the information about the conflict type. Therefore, this embodiment proposes the following solution:

[0269] 1. Conflict type indication:

[0270] In this embodiment, the indication information should be able to distinguish the types of conflicting resources, including the following conflicts:

[0271] Periodic resource reservation conflicts. Depending on the granularity of the indication, it can be further indicated as follows:

[0272] Persistent resource conflict means that the conflict will continue on the detected resource. After this situation is reported to the sending end (first terminal), the sending end should be able to reselect the resource.

[0273] The most recent single conflict means that only the most recent periodic resource reservation conflicted with other resource reservations, which is beneficial for non-periodic resource reservations.

[0274] Retransmission resource conflict; in this case, the base station can determine whether to reselect the resource for retransmission based on whether a retransmission has occurred. Here, depending on the granularity of the indication, further indications can be provided:

[0275] Resource conflict during the first retransmission;

[0276] Resource conflict during the second retransmission.

[0277] Optionally, this embodiment may also indicate a state in which both retransmission resources and periodic transmission resources are in conflict.

[0278] 2. In this embodiment, a conflict indication can be provided to UB-B (the second terminal) (i.e., UE-1 or UE-2 in this embodiment) by coordinating the UE, such as UE-A (the first terminal) acting as a third-party UE. When UE-A detects that UE-1 and UE-2 are both sending multicast services in the same time slot, it will also detect the destination IDs of the two multicast services. However, it cannot determine whether UE-1 needs to receive the multicast service from UE-2, nor can it determine whether UE-2 needs to receive the multicast service from UE-1. Therefore, UE-A can carry the multicast destination ID information when providing the conflict indication.

[0279] For example: UE-1 sends an SCI to UE-A, carrying its resource allocation information, and requires UE-A to provide feedback on cooperation information. UE-A detects that both UE-1 and UE-2 have resource allocations on the corresponding time slot resources and are both performing multicast NACK-only feedback services. In this case, the information fed back by UE-A carries the multicast target ID (or multicast source ID and target ID) information. When UE-1 receives a resource indicated by its SCI and there is a conflict, if it determines that the multicast target ID (or multicast source ID and target ID) is the multicast information it needs to receive, it will reselect resources and will no longer select resources in the same time slot, because resources in the same time slot mean that it cannot receive multicast information because it needs to send its own.

[0280] The above scheme, based on the assumption that UE-A needs to detect the second-level SCI, requires a certain level of detection complexity from the terminal, and is more suitable when UE-A is a potential receiver.

[0281] The following describes how to carry conflict indication information.

[0282] Based on the method for determining relevant PSFCH candidate resources, the UE first determines the number of resources in the candidate PSFCH resource set used for HARQ-ACK multiplexing in a single PSFCH transmission. in It represents the number of circular shift pairs within each resource pool. It depends on whether the candidate resources for PSFCH are determined based on the starting sub-channel of PSSCH or on all sub-channels.

[0283] First, the resources used for PSFCH collision feedback need to be distinguished from those used for normal PSFCH HARQ feedback. Therefore, resources for collision indication, including RB resources, periods, and time slots, can be configured separately.

[0284] Then, based on the traditional method, the number of resources in the PSFCH resource set used for multiplexing collision indication in a single PSFCH transmission is determined as follows: However, at this point, the PSFCH is no longer associated with the PSSCH, because UE B only sent the SCI, which sent the relevant scheduling information to UE-A, but did not send the corresponding PSSCH. The PSFCH resource that UE-A determines at this time corresponds to the SCI sent by UE-B.

[0285] Here, you can Further segmentation is used to indicate different information. Specific examples are shown below:

[0286] Example 1:

[0287] Assuming that information indicating both periodic resource conflicts and retransmission resource conflicts is required, UE-A determines the resource from which it sends the PSFCH as follows: P ID This represents the source ID of UE-1, i.e., the source ID of the UE that sent the SCI and needs to coordinate UE feedback of conflict information. Where I ID =0 corresponds to periodic resource conflicts, I ID =1 corresponds to a retransmission resource conflict. I can also be defined. ID =2 indicates a conflict between periodicity and retransmission resources.

[0288] Here, the resource that the UE-A determines to send the PSFCH can also be identified as... This means that the resource can be independent of the source ID of UE-1.

[0289] Example 2:

[0290] Assuming the need to indicate four types of resource conflicts—including persistent resource conflicts, single conflicts such as the most recent one, and retransmission resource conflicts, including the first and second retransmission resource conflicts—UE-A determines the resource for sending the PSFCH as follows: Where I ID =0 corresponds to a persistent conflict of periodic resources, I ID =1 corresponds to a single instance of a periodic resource conflict, such as the most recent one. I ID =3 corresponds to the resource conflict of the first retransmission, I ID =4 corresponds to the resource conflict during the second retransmission.

[0291] Here, the resource that the UE-A determines to send the PSFCH can also be identified as... This means that the resource can be independent of the source ID of UE-1.

[0292] Additionally, it can also be done through I ID =5 Indicates conflicts between retransmission resources (regardless of whether it is the first or second retransmission) and periodic resources (regardless of whether it is continuous or single-time).

[0293] Example 3: Indicating conflicts in half-duplex multicast based on multicast.

[0294] UE-A determines the resources for transmitting PSFCH as follows: D ID This represents the multicast destination ID. When UE-1 receives a conflict feedback on the corresponding PSFCH resource, indicating a conflict (e.g., by using the two values ​​of the CS pair to indicate whether a conflict exists), UE-1 will determine whether it needs to receive the multicast information corresponding to the destination ID carried in the conflict indication (this also applies to unicast, then D...). ID This indicates the destination ID for unicast. If a conflict exists, resources need to be reselected to avoid the same time slot.

[0295] Here, the resource that the UE-A determines to send the PSFCH can also be identified as... This means that the resource can be independent of the source ID of UE-1.

[0296] In addition, D ID It can also be changed to S ID +D ID This also relates to the source ID of the conflicting multicast or unicast.

[0297] Example 4: Compared to Example 3, this example further distinguishes between simultaneous slot conflicts between different sub-channels and sub-channel conflicts.

[0298] This embodiment primarily addresses the issue of half-duplex communication. When the data to be received and the data to be transmitted are in the same time slot, reception will fail even if there is no sub-channel conflict. However, only broadcast or unicast data that UE-1 needs to receive experiences time slot conflicts. Therefore, UE-1 needs to determine whether the conflict is a sub-channel conflict or a time slot conflict by considering the target ID in the conflict indication. For example, if UE-1 receives a time slot conflict (not a sub-channel conflict) on the channel indicated by its own SCI, but it is not the target ID, it means it does not need to receive the data, and therefore does not need to consider the time slot conflict feedback for resource reselection. However, if its own ID is the same as the target receive ID, resource reselection is required to avoid time slot conflicts.

[0299] In this embodiment, the first step is to... The resources are divided into two parts. One part is used to indicate that there is a collision in the transmission sub-channel. The other part is used to indicate that there is a time slot collision. Within each part, a method similar to that in Embodiment 3 is used, except... Replace with

[0300] In this embodiment of the invention, the PSFCH indicates the specific type of resource conflict, which can help the terminal determine whether to perform resource reselection and how to perform resource reselection, thereby improving the reliability of transmission.

[0301] The above description is merely a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention.

Claims

1. A resource conflict indication method, characterized in that, This method is applied to a first terminal and includes: Indication information is transmitted via the Physical Side Link Feedback Channel (PSFCH). This indication information is used to indicate conflict information regarding the resources selected by the second terminal. The conflict information includes at least one of the following: There are resource conflicts in the periodic reserved resources of the second terminal; There is a resource conflict in the retransmission resources of the second terminal; There is a resource conflict between the retransmission resources of the second terminal and the periodically reserved resources; The resources selected by the second terminal conflict with the transmission time slot or transmission sub-channel of the multicast transmission. The method further includes: determining the PSFCH resource for sending the indication information; The PSFCH resource for determining the transmission of the indication information includes: The PSFCH resources used for multiplexing collision information indication in the determined PSFCH transmission are divided into two parts: one part is used to indicate that there is a collision in the sub-channel of the transmission, and the other part is used to indicate that there is a time slot collision. Within the corresponding portion of the allocated resources, determine the PSFCH resource for sending the indication information; Determine the number of PSFCH resources used to multiplex collision information indications during PSFCH transmission; The PSFCH resource for sending the indication information is determined based on the number of resources and the conflict type; or... The PSFCH resource for sending the indication information is determined based on the number of resources, the conflict type, and the source ID of the second terminal; or, The PSFCH resource for sending the indication information is determined based on the number of resources and the multicast target ID; or... The PSFCH resource for sending the indication information is determined based on the number of resources, the target ID of the multicast, and the source ID of the second terminal; or, The PSFCH resource for sending the indication information is determined based on the number of resources, the target ID of the multicast, the source ID of the conflicting multicast or unicast, and the source ID of the second terminal.

2. The method according to claim 1, characterized in that, The selected resources of the second terminal are carried by the side link control information (SCI).

3. The method according to claim 1, characterized in that, The periodically reserved resources are subject to resource conflicts, including: Periodically reserved resources lead to continuous resource conflicts; Periodically reserved resources may result in a single resource conflict.

4. The method according to claim 1, characterized in that, The retransmission resources are subject to resource conflicts, including: The first retransmission of resources resulted in a resource conflict. The second retransmission encountered a resource conflict.

5. The method according to claim 1, characterized in that, The PSFCH resource used to send the indication information is different from the resource used in the PSFCH Hybrid Automatic Repeat Request (HARQ) feedback.

6. The method according to claim 1, characterized in that, The method also includes: The collision information is carried through the PSFCH transmission resource.

7. A resource conflict indication method, characterized in that, This method is applied to a second terminal, including: The indication information is received through the physical side link feedback channel PSFCH, and the indication information is used to indicate the conflict information of the resource selected by the second terminal. Resource reselection is performed based on the indicated information; wherein... The conflict information includes at least one of the following: There are resource conflicts in the periodic reserved resources of the second terminal; There is a resource conflict in the retransmission resources of the second terminal; There is a resource conflict between the retransmission resources of the second terminal and the periodically reserved resources; The resources selected by the second terminal conflict with the transmission time slot or transmission sub-channel of the multicast transmission. The PSFCH resource carrying the indication information is determined by any combination of the following information: The number of PSFCH resources used to multiplex collision information in PSFCH transmission, and the collision type; or... The PSFCH transmission uses the number of PSFCH resources, the collision type, and the source ID of the second terminal to indicate the collision information; or, The number of PSFCH resources used in PSFCH transmission to multiplex collision information, and the multicast target ID; or... The PSFCH transmission uses the number of PSFCH resources indicated by the collision information, the multicast target ID, and the source ID of the second terminal to multiplex the collision information; or, The PSFCH transmission uses the number of PSFCH resources indicated by the collision information, the target ID of the multicast, the source ID of the conflicting multicast or unicast, and the source ID of the second terminal. In the PSFCH transmission, the PSFCH resources used for multiplexing collision information indication are divided into two parts: one part is used to indicate that there is a collision in the sub-channel of the transmission, and the other part is used to indicate that there is a time slot collision; and the PSFCH resources carrying the indication information are determined within the corresponding part of the divided resources.

8. The method according to claim 7, characterized in that, The selected resources of the second terminal are carried by the side link control information (SCI).

9. The method according to claim 7, characterized in that, The PSFCH resource carrying the indication information is different from the resource fed back by the PSFCH Hybrid Automatic Repeat Request (HARQ).

10. A resource conflict indication device, characterized in that, The device is applied to the first terminal and includes: The transmitting module is configured to transmit indication information via the Physical Side Link Feedback Channel (PSFCH), the indication information being used to indicate conflict information existing in the resource selected by the second terminal, wherein the conflict information includes at least one of the following: There are resource conflicts in the periodic reserved resources of the second terminal; There is a resource conflict in the retransmission resources of the second terminal; There is a resource conflict between the retransmission resources of the second terminal and the periodically reserved resources; The resources selected by the second terminal conflict with the transmission time slot or transmission sub-channel of the multicast transmission. The determination module is used to determine the PSFCH resource for sending the indication information; The PSFCH resource for determining the transmission of the indication information includes: The PSFCH resources used for multiplexing collision information indication in the determined PSFCH transmission are divided into two parts: one part is used to indicate that there is a collision in the sub-channel of the transmission, and the other part is used to indicate that there is a time slot collision. Within the corresponding portion of the allocated resources, determine the PSFCH resource for sending the indication information; Determine the number of PSFCH resources used to multiplex collision information indications during PSFCH transmission; The PSFCH resource for sending the indication information is determined based on the number of resources and the conflict type; or... The PSFCH resource for sending the indication information is determined based on the number of resources, the conflict type, and the source ID of the second terminal; or, The PSFCH resource for sending the indication information is determined based on the number of resources and the multicast target ID; or... The PSFCH resource for sending the indication information is determined based on the number of resources, the target ID of the multicast, and the source ID of the second terminal; or, The PSFCH resource for sending the indication information is determined based on the number of resources, the target ID of the multicast, the source ID of the conflicting multicast or unicast, and the source ID of the second terminal.

11. A resource conflict indication device, characterized in that, This device is applied to a second terminal and includes: The receiving module is used to receive indication information through the physical side link feedback channel PSFCH, the indication information being used to indicate conflict information of the resources selected by the second terminal; The processing module is used to perform resource reselection based on the indication information; wherein, The conflict information includes at least one of the following: There are resource conflicts in the periodic reserved resources of the second terminal; There is a resource conflict in the retransmission resources of the second terminal; There is a resource conflict between the retransmission resources of the second terminal and the periodically reserved resources; The resources selected by the second terminal conflict with the transmission time slot or transmission sub-channel of the multicast transmission. The PSFCH resource carrying the indication information is determined by any combination of the following information: The number of PSFCH resources used to multiplex collision information in PSFCH transmission, and the collision type; or... The PSFCH transmission uses the number of PSFCH resources, the collision type, and the source ID of the second terminal to indicate the collision information; or, The number of PSFCH resources used in PSFCH transmission to multiplex collision information, and the multicast target ID; or... The PSFCH transmission uses the number of PSFCH resources indicated by the collision information, the multicast target ID, and the source ID of the second terminal to multiplex the collision information; or, The PSFCH transmission uses the number of PSFCH resources indicated by the collision information, the target ID of the multicast, the source ID of the conflicting multicast or unicast, and the source ID of the second terminal. In the PSFCH transmission, the PSFCH resources used for multiplexing collision information indication are divided into two parts: one part is used to indicate that there is a collision in the sub-channel of the transmission, and the other part is used to indicate that there is a time slot collision; and the PSFCH resources carrying the indication information are determined within the corresponding part of the divided resources.

12. A resource conflict indication device, characterized in that, The device includes: a processor and a memory for storing computer programs that can run on the processor. When the processor is used to run the computer program, it performs the steps of the method according to any one of claims 1-6, or the steps of the method according to any one of claims 7-9.

13. A computer-readable storage medium having a computer program stored thereon, characterized in that, When executed by a processor, the computer program implements the steps of the method according to any one of claims 1-6, or the steps of the method according to any one of claims 7-9.

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