Patent Application
20240244590
This application relates to the field of communications technologies, and specifically, to a resource reselection method and apparatus, a device, and a computer storage medium.
In a sidelink (SL) resource selection enhancement solution, a terminal (UE) A (UE-A) performs resource conflict detection. If a resource conflict is detected, the UE-A sends a resource conflict indication to a UE B (UE-B), and the UE-B performs resource reselection based on the resource conflict indication. Based on the enhancement solution, a hidden node/exposed node problem existing in communication between a transmit end UE and the UE-A can be effectively resolved. Although transmission performance between the UE-A and the UE-B is improved in such a manner to an extent, excessive resource reselection causes deterioration of transmission reliability and/or a decrease in efficiency of a system.
Embodiments of this application provide a resource reselection method and apparatus, a device, and a computer storage medium.
According to a first aspect, a resource reselection method is provided, where the method includes:
According to a second aspect, a resource reselection method is provided, where the method includes:
According to a third aspect, a resource reselection apparatus is provided, including:
According to a fourth aspect, a resource reselection apparatus is provided, including:
According to a fifth aspect, a terminal is provided, including a processor, a memory, and a program that is stored in the memory and that is capable of running on the processor, where when the program is executed by the processor, the steps of the method according to the first aspect or the second aspect are implemented.
According to a sixth aspect, a readable storage medium is provided, where the readable storage medium stores a program or instructions, and when the program or the instructions are executed by a processor, the steps of the method according to the first aspect or the second aspect are implemented.
According to a seventh aspect, a computer program product is provided, where the computer program product is stored in a non-transient storage medium, and the computer program product is executed by at least one processor to implement the steps of the method according to the first aspect or the second aspect.
According to an eighth aspect, a chip is provided, where the chip includes a processor and a communication interface, the communication interface is coupled to the processor, and the processor is configured to run a program or instructions to implement the method according to the first aspect or the second aspect.
According to a ninth aspect, a communication device is provided, configured to perform the method according to the first aspect or the second aspect.
The following clearly describes technical solutions in the embodiments of this application with reference to accompanying drawings in the embodiments of this application. Apparently, the described embodiments are some but not all of the embodiments of this application. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of this application shall fall within the protection scope of this application.
Terms “first”, “second”, and the like in the specification and claims of this application are used to distinguish between similar objects, instead of describing a specific sequence or order. It should be understood that, the terms used in such a way is interchangeable in proper circumstances, so that the embodiments of this application can be implemented in an order other than the order illustrated or described herein. Objects classified by “first” and “second” are usually of a same type, and a quantity of objects is not limited. For example, there may be one or more first objects. In addition, “and” in the specification and claims represents at least one of connected objects. A symbol “/” generally represents an “or” relationship between associated objects.
It should be noted that, technologies described in the embodiments of this application are not limited to a new radio (NR) system, a long term evolution (LTE)/LTE-advanced (LTE-A) system, and may be further 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 another system. Terms “system” and “network” in the embodiments of this application may be often used interchangeably. The technologies described can be applied to both the systems and the radio technologies mentioned above as well as to other systems and radio technologies. The following descriptions describe the NR system for example purposes, and NR terms are used in most of the following descriptions. However, the technologies can be further applied to an application other than an NR system application, for example, a 6th generation (6G) communication system.
To better understand the embodiments of this application, the following technical points are first described:
There are two NR SL resource allocation modes, one mode is based on base station scheduling (mode 1), and the other mode is based on autonomous resource selection of UE (mode 2). With regard to the resource allocation mode based on base station scheduling, a sidelink resource used by the UE for data transmission is determined by a base station, and transmit (TX) UE is notified by using downlink signaling. With regard to the resource allocation mode based on autonomous selection of the UE, the UE selects an available transmission resource from a (pre-)configured resource pool, and the UE performs channel sensing before resource selection, selects a resource set with less interference based on a channel sensing result, and then randomly selects a resource for transmission from the resource set.
For the mode 2, a specific working manner is as follows:
The UE in the mode 2 determines the candidate resource set by sensing transmission resource reservation of proximity UE. Therefore, the resource exclusion in the mode 2 may be referred to as “resource exclusion based on a reserved transmission resource”, and the resource selection in the mode 2 may be referred to as resource selection for “the resource exclusion based on the reserved transmission resource”.
UE-A performs resource conflict detection. If a resource conflict is detected, the UE-A sends a resource conflict indication to UE-B, and the UE-B performs resource reselection based on the resource conflict indication. A scenario in which the UE-A determines the resource conflict includes but is not limited to the following:
A physical sidelink control channel (PSCCH)/physical sidelink shared channel (PSSCH) transmission resource from UE-x to the UE-A conflicts with a PSCCH/PSSCH transmission resource from UE-y (the UE-y to the UE-A, or the UE-y to UE-z), and the UE-A triggers the UE-x or the UE-y to perform resource reselection. UE performing resource reselection is the UE-B.
The PSCCH/PSSCH transmission resource from the UE-x to the UE-A conflicts with the PSCCH/PSSCH transmission resource from the UE-y (the UE-y to the UE-A, or the UE-y to the UE-z), and the UE-A triggers the UE-x or the UE-y to perform resource reselection.
Transmission performance from the UE-x/UE-y to the UE-A is improved to an extent. However, excessive resource reselection causes deterioration of transmission reliability and/or a decrease in efficiency of a system. Therefore, the solution should avoid excessive resource reselection/redundant resource reselection as much as possible. In addition, improper resource reselection also cannot improve transmission performance from the UE-x/UE-y to the UE-A.
Therefore, it is urgent to resolve how the UE-A triggers resource reselection under what circumstances, and how resource reselection behavior of the UE-B should be enhanced.
The network side device 13 may be a base station or a core network. The base station may be referred to as a NodeB, an evolved NodeB, an access point, a base transceiver station (BTS), a radio base station, a radio transceiver, a basic service set (BSS), an extended service set (ESS), a NodeB, an evolved NodeB (gNB), a home NodeB, a home evolved NodeB, a WLAN access point, a Wi-Fi node, a transmission reception point (TRP), a radio access network node, or another appropriate term in the art. As long as a same technical effect is achieved, the base station is not limited to a specified technical term. It should be noted that, in the embodiments of this application, only a base station in an NR system is used as an example. However, a specific type of the base station is not limited.
As shown in
Step 201: A first terminal sends resource conflict indication information based on first information.
The first information includes any one of the following:
For example, the first terminal may alternatively be described as UE-A, and the second terminal may alternatively be described as UE-B.
In this case, before triggering resource reselection, the first terminal detects that a transmission resource from a specific transmit end is in conflict, to avoid excessive resource reselection/redundant resource reselection.
The transmission resource in this specification may be a physical sidelink control channel (PSCCH) or physical sidelink shared channel (PSSCH) transmission resource.
In this case, before triggering resource reselection, the first terminal detects that a specific transmission resource from a transmit end of the first terminal is in conflict, to avoid excessive resource reselection/redundant resource reselection.
In this case, the first terminal may enable the feature based on the congestion situation of the resource pool, to avoid deterioration of system performance caused by excessive resource reselection.
In this case, if a transmission resource from a transmit end of the first terminal to the first terminal conflicts with a plurality of (or one) other transmission resources, transmission resources in conflict may be successively triggered based on the first order, to avoid system performance deterioration caused by blindly triggering all/excessive conflicting resource reselection.
In an implementation of this application, the method further includes one or more of the following:
Manner a: The first terminal receives second information from the second terminal.
For example, the first terminal receives the second information from the second terminal by using PC5 radio resource control (RRC) signaling.
The second information indicates whether the second terminal is capable of receiving the resource conflict indication information sent by the first terminal, and/or the second information indicates whether the second terminal is capable of performing resource reselection based on the resource conflict indication information sent by the first terminal.
Manner b: The first terminal sends third information to the second terminal.
For example, the first terminal sends the third information to the second terminal by using PC5-RRC signaling.
The third information indicates whether the first terminal is capable of detecting that the transmission resource of the second terminal is in conflict, and/or the third information indicates that the first terminal sends the resource conflict indication information when detecting that the transmission resource of the second terminal is in conflict.
It can be understood that the first terminal and the second terminal negotiate whether the first terminal can send the resource conflict indication information when detecting that the transmission resource of the second terminal is in conflict. For example, the first terminal and the second terminal negotiate, for specific resources by using the PC5-RRC signaling, whether the first terminal can send the resource conflict indication information when detecting that the transmission resource of the second terminal is in conflict, where the PC5-RRC signaling carries a resource identifier (source Identity document, source ID) or a destination identifier (destination ID).
In an implementation of this application, the method further includes:
In an implementation of this application, the congestion situation of the resource pool of the first terminal includes any one of the following:
Optionally, the congestion degree may be a channel busy ratio (CBR). Certainly, the congestion degree is not limited thereto.
A transmission priority of the first transmission resource is higher than a second preset threshold; a transmission priority of the first transmission resource is lower than a third preset threshold; or transmission of the first transmission resource is of a preset cast type, such as unicast or multicast (groupcast).
Optionally, the first preset threshold is specified in a protocol, or configured or pre-configured by a control node.
In an implementation of this application, before the step of sending, by the first terminal, the resource conflict indication information based on the first order, the method further includes:
Optionally, the second transmission resource is a transmission resource reserved by the transmit end of the first terminal, and the reservation includes at least one of periodic resource reservation or aperiodic resource reservation.
In an implementation of this application, when the first terminal detects a plurality of second transmission resources of transmit ends of the first terminal, the method further includes:
It should be noted that a plurality of second transmission resources may come from a same transmit end; or some may come from a same transmit end, and some may come from another transmit end; or the second transmission resources come from different transmit ends.
In an implementation of this application, the transmission resource in conflict includes one or more of the following:
The third terminal may alternatively be described as a transmit end that is not the first terminal.
In an implementation of this application, the performing conflict determining on the second transmission resources of the plurality of transmit ends of the first terminal includes:
For example, the first terminal performs conflict determining on the first second transmission resource of the transmit end of the first terminal and uses corresponding reselection triggering behavior. Then, the first terminal performs conflict determining on a second second transmission resource of the transmit end of the first terminal, and uses corresponding reselection triggering behavior. Then, the first terminal performs conflict determining on a third second transmission resource of the transmit end of the first terminal, and uses corresponding reselection triggering behavior. Then, the first terminal performs conflict determining on a fourth second transmission resource of the transmit end of the first terminal, and uses corresponding reselection triggering behavior, until all conflicts are resolved.
It should be noted that if a first terminal performs a conflict indication on a second transmission resource/is triggered to perform resource reselection, there is no need to perform conflict determining on the second transmission resource.
In an implementation of this application, the respectively performing conflict determining on first to Nth second transmission resources of the transmit ends of the first terminal includes:
Optionally, the foregoing any terminal may not include the first terminal.
In an implementation of this application, the sending resource conflict indication information includes:
Optionally, a measurement value of a transmission resource of the fourth terminal or the transmission resource of the fifth terminal is greater than a fourth preset threshold.
Optionally, the fourth preset threshold is equal to a first threshold, and the first threshold is a threshold used when the first terminal identifies the non-preferred resource based on strength of a transmission signal on the transmission resource.
Optionally, the first triggering manner includes: whether to trigger the first transmit end or the target transmit end to perform resource reselection is specified in a protocol, that is, an execution condition of triggering the first transmit end to perform resource reselection and an execution condition of triggering the target transmit end to perform resource reselection may be specified.
If the foregoing manner 1 is used, the first transmit end is triggered to perform resource reselection. However, if the resource pool enables a preemption check, a terminal having a resource overlapping the transmission resource of the first transmit end may be triggered based on the preemption check to perform reselection, resulting in redundant resource reselection.
If in the foregoing manner 2, there may be a plurality of terminals having a resource overlapping the transmission resource of the first transmit end, resource reselection by a plurality of UEs is directly caused in the manner 2. This is not conducive to maintaining system performance.
In an implementation of this application, the execution condition of the manner 1 or the manner 2 may be specified in a protocol, thereby reducing negative impact on system performance. The execution condition includes at least one of the following:
Execution condition 1: If the resource pool does not enable the preemption check, the manner 1 is used.
Execution condition 2: If the corresponding resource pool enables the preemption check, the manner 1 is used in at least the following cases:
In an implementation of this application, the triggering a target transmit end to perform resource reselection includes:
In an implementation of this application, the method further includes:
In an implementation of this application, in a process in which the first terminal determines whether the second transmission resource of the first transmit end is still in resource conflict, a transmission resource on which the first terminal determines to perform a resource conflict indication is not included in a resource conflict determining process, that is, the first terminal ignores transmission resources on which triggering reselection is determined.
In an implementation of this application, the respectively performing conflict determining on first to Nth second transmission resources of the transmit ends of the first terminal further includes:
Optionally, the resource conflict indication information is used to indicate the second terminal to exclude, when identifying a candidate resource set, a time domain and/or frequency domain transmission resource occupied by a transmission resource on which the first terminal determines to trigger reselection; the resource conflict indication information is used to indicate the second terminal to exclude, from a candidate resource set when performing resource selection, a time domain and/or frequency domain transmission resource occupied by a transmission resource on which the first terminal determines to trigger reselection; the resource conflict indication information is used to indicate the second terminal to exclude, when identifying a candidate resource set, a time domain and/or frequency domain transmission resource associated with a feedback resource corresponding to a transmission resource on which the first terminal determines to trigger reselection; or the resource conflict indication information is used to indicate the second terminal to exclude, from a candidate resource set, a time domain and/or frequency domain transmission resource associated with a feedback resource corresponding to a transmission resource on which the first terminal determines to trigger reselection.
The feedback resource in this specification may be a physical sidelink feedback channel (PSFCH) feedback resource, and a transmission resource associated with the feedback resource may be a PSCCH or PSSCH transmission resource mapped on a corresponding PFSCH occasion.
In this way, useless resource reselection caused by the second terminal repeatedly selecting a same resource and a failure to avoid a resource conflict are avoided.
In this embodiment of this application, the first terminal may trigger resource reselection based on the first information, to avoid a problem of deterioration of transmission reliability and/or a decrease in efficiency of a system caused by excessive resource reselection.
As shown in
Step 301: A second terminal receives resource conflict indication information from a first terminal, where the resource conflict indication information is sent by the first terminal based on first information, for example, the second terminal is a transmit end of the first terminal.
Step 302: The second terminal performs resource reselection based on the resource conflict indication information.
The first information includes any one of the following:
In an implementation of this application, the method further includes:
In an implementation of this application, the method further includes: sending, by the second terminal, fourth information to the first terminal, where the fourth information indicates whether the first terminal needs to send the resource conflict indication information when detecting that the first transmission resource is in conflict, and a transmission resource of the fourth information is associated with the first transmission resource.
In an implementation of this application, the congestion situation of the resource pool of the first terminal includes any one of the following:
In an implementation of this application, the performing, by the second terminal, resource reselection based on the resource conflict indication information includes:
In this embodiment of this application, the second terminal may receive the resource conflict indication information from the first terminal. The resource conflict indication information is sent by the first terminal based on the first information, thereby avoiding a problem of deterioration of transmission reliability and/or a decrease in efficiency of a system caused by excessive resource reselection by the second terminal.
As shown in
In an implementation of this application, the apparatus further includes:
In an implementation of this application, the apparatus further includes:
In an implementation of this application, the congestion situation of the resource pool of the first terminal includes any one of the following:
Optionally, the first preset threshold is specified in a protocol, or configured or pre-configured by a control node.
In an implementation of this application, the apparatus further includes:
Optionally, the second transmission resource is a transmission resource reserved by the transmit end of the first terminal, and the reservation includes at least one of periodic resource reservation or aperiodic resource reservation.
In an implementation of this application, the apparatus further includes:
In an implementation of this application, the transmission resource in conflict includes one or more of the following:
In an implementation of this application, the first determining module is further configured to respectively perform conflict determining on first to Nth second transmission resources of the transmit ends of the first terminal, where Nth is greater than 1.
In an implementation of this application, the first determining module is further configured to: detect whether a second transmission resource of a first transmit end of the first terminal belongs to a non-preferred resource identified by the first terminal; and if the second transmission resource belongs to the non-preferred resource identified by the first terminal, determine that the second transmission resource of the first transmit end is in resource conflict; or
Optionally, the foregoing any terminal may not include the first terminal.
In an implementation of this application, the sending resource conflict indication information includes:
Optionally, a measurement value of a transmission resource of the fifth terminal or the transmission resource of the sixth terminal is greater than a fourth preset threshold.
Optionally, the fourth preset threshold is equal to a first threshold, and the first threshold is a threshold used when the first terminal identifies the non-preferred resource based on strength of a transmission signal on the transmission resource.
In an implementation of this application, the triggering a target transmit end to perform resource reselection includes:
In an embodiment of this application, the apparatus further includes:
In an implementation of this application, in a process in which the first terminal determines whether the second transmission resource of the first transmit end is still in resource conflict, a transmission resource on which the first terminal determines to perform a resource conflict indication is not included in a resource conflict determining process.
Optionally, the first triggering manner includes: whether to trigger the first transmit end or the target transmit end to perform resource reselection is specified in a protocol.
In an implementation of this application, the respectively performing conflict determining on first to Nth second transmission resources of the transmit ends of the first terminal further includes:
Optionally, the resource conflict indication information is used to indicate the second terminal to exclude, when identifying a candidate resource set, a time domain and/or frequency domain transmission resource occupied by a transmission resource on which the first terminal determines to trigger reselection; the resource conflict indication information is used to indicate the second terminal to exclude, from a candidate resource set when performing resource selection, a time domain and/or frequency domain transmission resource occupied by a transmission resource on which the first terminal determines to trigger reselection; the resource conflict indication information is used to indicate the second terminal to exclude, when identifying a candidate resource set, a time domain and/or frequency domain transmission resource associated with a feedback resource corresponding to a transmission resource on which the first terminal determines to trigger reselection; or the resource conflict indication information is used to indicate the second terminal to exclude, from a candidate resource set, a time domain and/or frequency domain transmission resource associated with a feedback resource corresponding to a transmission resource on which the first terminal determines to trigger reselection.
The apparatus provided in this embodiment of this application can implement the processes implemented in the method embodiment shown in
As shown in
In an implementation of this application, the apparatus further includes:
In an implementation of this application, the apparatus further includes:
In an implementation of this application, the congestion situation of the resource pool of the first terminal includes any one of the following:
In an implementation of this application, the reselection module 502 is further configured to:
The apparatus provided in this embodiment of this application can implement the processes implemented in the method embodiment shown in
An embodiment of this application further provides a terminal, including a processor and a communication interface. The processor is configured to execute a procedure of the method shown in
Specifically,
A person skilled in the art can understand that the terminal 600 may further include a power supply (for example, a battery) that supplies power to each component. The power supply may be logically connected to the processor 610 by using a power supply management system, to implement functions such as charging and discharging management and power consumption management by using the power supply management system. The terminal structure shown in
It should be understood that in this embodiment of this application, the input unit 604 may include a graphics processing unit (GPU) 6041 and a microphone 6042, and the graphics processing unit 6041 processes image data of a static picture or video obtained by an image capture apparatus (such as a camera) in a video capture mode or an image capture mode. The display unit 606 may include a display panel 6061. The display panel 6061 may be configured in a form such as a liquid crystal display or an organic light-emitting diode. The user input unit 607 includes a touch panel 6071 and another input device 6072. The touch panel 6071 is also referred to as a touchscreen. The touch panel 6071 may include two parts: a touch detection apparatus and a touch controller. The another input device 6072 may include but is not limited to a physical keyboard, a functional button (such as a volume control button or a power on/off button), a trackball, a mouse, and a joystick. Details are not described herein.
In this embodiment of this application, the radio frequency unit 601 receives downlink data from a network side device and then sends the downlink data to the processor 610 for processing; and sends uplink data to the network side device. Usually, 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, and the like.
The memory 609 may be configured to store a software program or instructions and various data. The memory 609 may mainly include a program or instruction storage area and a data storage area. The program or instruction storage area may store an operating system, an application or an instruction required by at least one function (for example, a sound playing function or an image playing function), and the like. In addition, the memory 609 may include a high-speed random access memory, and may further include a non-transient memory. The non-transient memory may be a read-only memory (ROM), a programmable read-only memory (Programmable ROM, PROM), an erasable programmable read-only memory (Erasable PROM, EPROM), an electrically erasable programmable read-only memory (Electrically EPROM, EEPROM), or a flash memory, such as at least one magnetic disk storage component, a flash memory component, or another non-transitory solid-state storage component.
The processor 610 may include one or more processing units. Optionally, an application processor and a modem processor may be integrated into the processor 610. The application processor mainly processes an operating system, a user interface, an application, an instruction, or the like. The modem processor mainly processes wireless communication, for example, a baseband processor. It may be understood that, alternatively, the modem processor may not be integrated into the processor 610.
The terminal provided in this embodiment of this application can implement the processes implemented in the method embodiment shown in
Optionally, as shown in
An embodiment of this application further provides a computer program/program product, the computer program/program product is stored in a non-volatile storage medium, and when the computer program/program product is executed by at least one processor, the steps of the processing method according to
An embodiment of this application further provides a readable storage medium, where the readable storage medium stores a program or instructions, and when the program or the instructions are executed by a processor, the processes of the method embodiments shown in
The processor is the processor in the terminal or the network side device described in the foregoing embodiment. The readable storage medium includes a computer readable storage medium, such as a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disc.
An embodiment of this application further provides a chip. The chip includes a processor and a communication interface. The communication interface is coupled to the processor, and when the processor is configured to run a program or instructions, each process of the method embodiment shown in
It should be understood that the chip mentioned in this embodiment of this application may alternatively be referred to as a system-level chip, a system chip, a chip system, or a system on chip.
It should be noted that, in this specification, the term “include”, “comprise”, or any other variant thereof is intended to cover a non-exclusive inclusion, so that a process, a method, an article, or an apparatus that includes a list of elements not only includes those elements but also includes other elements which are not expressly listed, or further includes elements inherent to this process, method, article, or apparatus. An element limited by “includes a . . . ” does not, without more constraints, preclude the presence of additional identical elements in the process, method, article, or apparatus that includes the element. In addition, it should be noted that the scope of the method and the apparatus in the implementations of this application is not limited to performing functions in an illustrated or discussed order, and may further include performing functions in a basically simultaneous manner or in a reverse order according to the functions concerned. For example, the described method may be performed in an order different from that described, and the steps may be added, omitted, or combined. In addition, features described with reference to some examples may be combined in other examples.
Based on the descriptions of the foregoing implementations, a person skilled in the art may clearly understand that the method in the foregoing embodiment may be implemented by software in addition to a necessary universal hardware platform or by hardware only. In most circumstances, the former is a preferred implementation. Based on such an understanding, the technical solutions of this application essentially or the part contributing to the prior art may be implemented in a form of a computer software product. The computer software product is stored in a storage medium (such as a ROM/RAM, a hard disk, or an optical disc), and includes several instructions for instructing a terminal (which may be a mobile phone, a computer, a server, an air-conditioner, a network device, or the like) to perform the method described in the embodiments of this application.
The embodiments of this application are described above with reference to the accompanying drawings, but this application is not limited to the foregoing specific implementations, and the foregoing specific implementations are only illustrative and not restrictive. Under the enlightenment of this application, a person of ordinary skill in the art can make many forms without departing from the purpose of this application and the protection scope of the claims, all of which fall within the protection of this application.
| Number | Date | Country | Kind |
|---|---|---|---|
| 202111152841.0 | Sep 2021 | CN | national |
This application is a Bypass Continuation Application of PCT International Application No. PCT/CN2022/121268 filed on Sep. 26, 2022, which claims priority to Chinese Patent Application No. 20/211,1152841.0, filed on Sep. 29, 2021 in China, which are incorporated herein by reference in their entireties.
| Number | Date | Country | |
|---|---|---|---|
| Parent | PCT/CN2022/121268 | Sep 2022 | WO |
| Child | 18619566 | US |
