CN112291836B - Resource selection method, device and terminal - Google Patents

Abstract

The present invention provides a resource selection method, device and terminal. The method is applied to the terminal, including: selecting transmission resources for the first M transmissions of service packets by performing resource awareness; randomly selecting transmission resources for N transmissions after M times ; Wherein, N+M is the total transmission times of the service packets, N≥1, M≥1. The solution of the present invention is aimed at terminals sensitive to power consumption, and can improve power saving efficiency while taking transmission reliability into consideration during resource selection.

Description

A resource selection method, device and terminal

technical field

The present invention relates to the field of communication technologies, and in particular to a resource selection method, device and terminal.

Background technique

V2X (Vehicle-to-Everything, Vehicle-to-Everything) technology is continuously gaining support from the ecosystem. In a V2X system, how to reduce power consumption while ensuring the reliability of data sent by the UE is a problem that needs to be solved for the UE, especially the UE sensitive to power consumption (such as a portable terminal P-UE).

At present, the existing resource selection schemes include random resource selection and partial sensing resource selection. The random resource selection scheme does not require sensing and is the most effective in saving power consumption. In the case of being occupied, the resource collision probability is high, the transmission reliability is low, and the system performance is greatly affected; the partial sensing resource selection scheme senses the resource selection window given by the UE, and selects the initial retransmission resource from the resource selection window, because The resource selection window needs to accommodate multiple transmission resources, so the resource window cannot be too small. Although this effectively reduces the probability of resource collisions, the efficiency of power saving is significantly reduced.

Therefore, for power consumption-sensitive UEs, how to improve power saving efficiency while taking into account transmission reliability during resource selection is an urgent technical problem to be solved.

Contents of the invention

The present invention provides a resource selection method, device and terminal, which solves the problem in the prior art that transmission reliability and power saving efficiency cannot be considered simultaneously in resource selection for UEs sensitive to power consumption.

In the first aspect, the embodiment of the present invention provides a resource selection method applied to a terminal, including:

Select transmission resources for the first M transmissions of service packets by performing resource awareness;

Randomly select transmission resources for N transmissions after M times; wherein, N+M is the total number of transmissions of the service package, N≥1, M≥1.

Optionally, the selection of transmission resources for the first M transmissions of service packets by performing resource awareness includes:

Determine Y time slots in the resource selection window, Y≥M;

For each subframe y in Y, perform resource awareness on subframe y-P to obtain a set of available candidate resources; where P is at least one resource reservation period configured or preconfigured by the high layer;

In the set of available candidate resources, select transmission resources for the first M transmissions of the service package.

Optionally, the Y is determined according to the service priority and/or the size of the frequency resource occupied by the service package.

Optionally, the time slot interval between at least part of two adjacent transmission resources is greater than the preset duration T3.

Optionally, each transmission of the service packet carries sidelink control information (Sidelink controlinformation, SCI), and the SCI carries indication information, and the indication information is used to instruct the terminal not to perform resource preemption Evaluation and/or resource re-evaluation.

Optionally, the indication information instructs the terminal not to perform resource preemption evaluation and/or resource re-evaluation by adding a preset bit information field in the SCI.

Optionally, the indication information instructs the terminal not to perform resource preemption evaluation and resource re-evaluation through the service priority carried in the SCI.

In the second aspect, an embodiment of the present invention provides a resource selection device, which is applied to a terminal, including:

The first selection module is configured to select transmission resources for the first M transmissions of service packets by performing resource awareness;

The second selection module is configured to randomly select transmission resources for N transmissions after M times; wherein, N+M is the total number of transmissions of the service package, N≥1, M≥1.

In a third aspect, an embodiment of the present invention provides a terminal, including: a transceiver, a memory, a processor, and a computer program stored on the memory and operable on the processor, and the computer program is implemented when the processor executes the computer program The steps of the resource selection method as described above.

In a fourth aspect, an embodiment of the present invention provides a computer-readable storage medium, on which a computer program is stored, and when the computer program is executed by a processor, the steps of the above resource selection method are implemented.

The beneficial effect of above-mentioned technical scheme of the present invention is:

The above solution selects transmission resources for the first M transmissions of service packets by performing resource awareness, and randomly selects resources for the remaining N transmissions without performing resource awareness. For multiple transmissions, the time slot in the resource selection window can be greatly reduced The quantity can significantly improve the power saving efficiency of the terminal while taking into account the transmission reliability.

Description of drawings

Fig. 1 shows the flowchart of the resource selection method of the embodiment of the present invention;

FIG. 2 shows a schematic diagram of a resource awareness window and a resource selection window in the present invention;

FIG. 3 shows a schematic diagram of resource selection in the present invention;

FIG. 4 shows one of the schematic diagrams of resource reselection in the present invention;

FIG. 5 shows the second schematic diagram of resource reselection in the present invention;

Fig. 6 shows the structural diagram of the resource selection device of the present invention;

FIG. 7 shows a block diagram of the structure of the terminal of the present invention.

Detailed ways

In order to make the technical problems, technical solutions and advantages to be solved by the present invention clearer, the following will describe in detail with reference to the drawings and specific embodiments. In the following description, specific details, such as specific configurations and components, are provided only to assist in a comprehensive understanding of the embodiments of the present invention. Accordingly, those of ordinary skill in the art should recognize that various changes and modifications of the embodiments described herein can be made without departing from the scope and spirit of the invention. Also, descriptions of well-known functions and constructions are omitted for clarity and conciseness.

It should be understood that reference throughout this specification to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic related to the embodiment is included in at least one embodiment of the present invention. Thus, appearances of "in one embodiment" or "in an embodiment" in various places throughout the specification are not necessarily referring to the same embodiment. Furthermore, the particular features, structures or characteristics may be combined in any suitable manner in one or more embodiments.

In various embodiments of the present invention, it should be understood that the sequence numbers of the following processes do not mean the order of execution, and the order of execution of each process should be determined by its functions and internal logic, rather than implementing the present invention. The implementation of the examples constitutes no limitation.

Additionally, the terms "system" and "network" are often used interchangeably herein.

In the embodiments provided in this application, it should be understood that "B corresponding to A" means that B is associated with A, and B can be determined according to A. However, it should also be understood that determining B according to A does not mean determining B only according to A, and B may also be determined according to A and/or other information.

In the embodiment of the present invention, the form of the access network is not limited, and may include a macro base station (Macro Base Station), a micro base station (Pico Base Station), a Node B (the name of a 3G mobile base station), an enhanced base station (eNB), Access to home enhanced base station (Femto eNB or Home eNode B or Home eNB or HeNB), relay station, access point, RRU (Remote RadioUnit, remote radio frequency module), RRH (Remote Radio Head, remote radio head), etc. net. A user terminal may be a mobile phone (or cell phone), or other devices capable of sending or receiving wireless signals, including user equipment, personal digital assistants (PDAs), wireless modems, wireless communication devices, handheld devices, laptop computers, cordless phones , wireless local loop (WLL) station, CPE (Customer Premise Equipment, customer terminal) capable of converting mobile signals into WiFi signals or mobile smart hotspots, smart home appliances, or other mobile communication networks that can communicate spontaneously without human operation equipment etc.

Specifically, the embodiments of the present invention provide a resource selection method, device and terminal, which solves the problem in the prior art that transmission reliability and power saving efficiency cannot be taken into account during resource selection for UEs sensitive to power consumption.

first embodiment

As shown in Figure 1, the embodiment of the present invention provides a resource selection method, which is applied to a terminal, such as a portable terminal (P-UE), and the method specifically includes the following steps:

Step 11: Select transmission resources for the first M transmissions of service packets by performing resource awareness;

In this step, M≥1, which includes selecting initial transmission resources only for service packets by performing resource sensing, or selecting initial transmission resources and part of retransmission resources for service packets by performing resource sensing.

Specifically, by performing resource sensing, the sensing information such as the resource occupation of other terminal nodes and the reservation of subsequent resources is obtained, and the appropriate M transmission resources are selected for the service package according to the sensing information. It mainly involves two windows, a resource awareness window and a resource selection window, and the time relationship between the two windows is shown in Figure 2.

Step 12: Randomly select transmission resources for N transmissions after M times; wherein, N+M is the total number of transmissions of the service packet, N≥1, M≥1.

In this step, the N transmission resources are randomly selected in the resource selection window, or are randomly selected in the resource selection window according to existing sensing data, and no additional resource sensing process is performed.

For example, as shown in FIG. 3 , it shows that only initial transmission resources are selected through resource perception, and each retransmission resource is randomly selected in the resource selection window.

In this embodiment, the transmission resource is selected for the first M transmissions of the service packet through perception, and the remaining N transmission resources are randomly selected. For multiple transmissions, the number of time slots in the resource selection window can be greatly reduced, and the transmission While ensuring reliability, it can significantly improve the power saving efficiency of the terminal.

In one embodiment, the above step 11 includes:

Determine Y time slots in the resource selection window, Y≥M;

For each subframe y in Y, perform resource awareness on subframe y-P to obtain a set of available candidate resources; where P is at least one resource reservation period configured or preconfigured by the high layer;

In the set of available candidate resources, select transmission resources for the first M transmissions of the service package.

In this embodiment, by performing resource awareness on subframes y-P, subframes in Y are excluded to obtain a set of available candidate resources, and in the set of available candidate resources, transmission is selected for the first M transmissions of the service package Resources, in this way, can reduce the probability of resource collisions and ensure transmission reliability.

Specifically, the Y is determined according to the service priority and/or the frequency resource size occupied by the service package.

Exemplarily, the determination of the Y value according to the service priority includes: the system configures the minimum value of the Y value for each service priority. For example, for service priority 3, the minimum value of the Y value configured by the system is 4 slots, then when the UE performs resource awareness, for services with service priority 3, the self-determined Y value needs to be greater than 4 slots.

Exemplarily, the determination of the Y value according to the frequency resources occupied by the service package includes: system configuration parameter z, Y=(z/k)×M; wherein, z is the number of candidate resources corresponding to one transmission of the service package, k is the number of candidate resources included in each time slot, and M is the number of transmissions.

Exemplarily, the adjustment of the value of Y according to the service priority and the frequency resources occupied by the service package includes: the system defines a parameter mi for each service priority pi, assuming that the terminal selects one resource from Y as the initial transmission, and at the same time the If the service priority is 3, then the corresponding parameter m3 is obtained according to the above configuration; according to the size of the data packet, the number of candidate resources contained in each time slot is k, then Y≥ceil(m3/k), that is, Y is greater than or equal to m3/k up Round the corresponding value.

Further, in order to reserve time for resource reselection for other terminals, in an embodiment, at least part of the time slot interval between two adjacent transmission resources is greater than the preset duration T3, where T3 is a value configured by a higher layer.

Wherein, at least partially adjacent two transmission resources may include:

(1) Two adjacent transmission resources at a specific location, for example, the time slot interval between the Mth and M+1th transmission resources is greater than the preset duration T3; for example, the M-1th and Mth times The time slot interval between transmission resources is greater than the preset duration T3;

(2) The time slot interval between any two adjacent transmission resources is greater than the preset duration T3;

(3) Only for the N transmissions after the M transmissions, make the time slot interval between any two adjacent transmission resources in the N transmissions be greater than the preset duration T3.

In an embodiment, each transmission of the service packet carries direct link control information SCI, and the SCI carries indication information, and the indication information is used to instruct the terminal not to perform resource preemption evaluation and/or or resource reassessment.

Among them, resource re-evaluation refers to: for resources that have been selected but not reserved by the sent SCI, the terminal UE can re-evaluate this resource, and when a resource conflict occurs and the resource re-selection condition is met, resource re-selection will be performed, such as Figure 4 shows.

Resource preemption means: for the resources reserved by the sent SCI, the UE can preemptively evaluate the resources. When a resource conflict occurs and the resource reselection conditions are met, the resource reselection will be performed, as shown in Figure 5.

In this embodiment, the SCI is carried in each transmission of the service packet. In addition to indicating the time-frequency position of the subsequent transmission resources, the SCI also carries information used to indicate that the terminal does not perform resource preemption evaluation and/or resource relocation. Instructions for the evaluation.

Specifically, in an embodiment, the indication information instructs the terminal not to perform resource preemption evaluation and/or resource re-evaluation by adding a preset bit information field in the SCI:

Exemplarily, by adding a bit information field (such as 1 bit) in the SCI to indicate that the terminal does not perform resource preemption evaluation, and in the case where the high-level configuration allows the terminal to enable the preemption mechanism, the terminal can use this bit information field to notify other terminals, This terminal does not perform preemption processing.

Exemplarily, by adding a bit information field (such as 1 bit) in the SCI to indicate that the terminal does not perform resource re-evaluation, the terminal can use this bit information field to notify other terminals if the high-level configuration allows the terminal to enable the re-evaluation mechanism , the terminal does not perform re-evaluation processing.

It should be pointed out that the SCI can use different bit information fields to represent non-execution of re-evaluation and non-execution of resource preemption, or use the same bit information field to represent non-execution of re-evaluation and resource preemption at the same time.

In an embodiment, it may further include: adding a bit information field in the SCI to indicate that other terminals are required to perform reselection avoidance when a resource conflict occurs.

Further, as an implementation, the system is configured with a priority Pe. When the service priority of the terminal is higher than the priority Pe configured by the system, the terminal has the right to use the newly added bit information field in the SCI to indicate the terminal Do not execute preemption or indicate that other terminals are required to avoid reselection.

Exemplarily, when the added bit in the SCI is 1, it is used to indicate that preemption is not performed, and when the added bit in the SCI is 0, it is used to indicate that preemption is performed. Among them, when the service priority of the terminal is higher than the priority Pe of the system configuration, the terminal has the right to set the bit value in the newly added bit in the SCI to 1 to indicate that preemption is not performed; if the service priority is lower than Pe, the newly added bit can only be set to 0.

In an embodiment, the indication information instructs the terminal not to perform resource preemption evaluation and resource re-evaluation through the service priority carried in the SCI.

Exemplarily, when the service priority carried in the SCI is the minimum value, instruct the terminal not to perform resource preemption evaluation and re-evaluation; when the service priority is other values except the minimum value, instruct the terminal to perform resource preemption evaluation and resource reassessment.

In an embodiment, the resource indicated in the SCI is configured with a priority parameter Ps, and when the indication information carried in the SCI indicates that resource preemption evaluation is not performed, other terminals will the higher priority among the others) determines whether to perform resource reselection.

In an embodiment, the resource indicated by the SCI is configured with a priority parameter Ps, and the SCI also includes indication information and service priority used to characterize whether the terminal is a portable terminal;

Wherein, when the indication information indicates that the terminal is a portable terminal, the minimum value of the priority parameter Ps and the service priority (corresponding to the high priority of the two) is used for other terminals to determine whether to execute Resource reselection.

In one embodiment, enabling the re-evaluation mechanism is configured by a high-level layer, including at least one of the following:

The high-level configures whether the re-evaluation mechanism is enabled for the resource pool;

The upper layer configures whether to enable the re-evaluation mechanism for a certain type of terminal;

The upper layer configures whether to enable the re-evaluation mechanism for a certain terminal.

In an embodiment, enabling the preemption mechanism is configured by a high layer, including at least one of the following:

The high-level configures whether to enable the preemption mechanism of the resource pool;

The upper layer configures whether to enable the preemption mechanism for a certain type of terminal;

The upper layer configures whether to enable the preemption mechanism for a certain terminal.

It should be noted that, in an optional embodiment, the terminal randomly selects L resources in the resource selection window as the initial retransmission resources of the data packet, and ensures that the time slot distance between any two adjacent transmission resources is greater than the predetermined Let the duration be T3, where T3 is configured by the upper layer, and L is the total number of transmission times of the data packet.

second embodiment

As shown in FIG. 6, an embodiment of the present invention provides a resource selection device 600, which is applied to a terminal, including:

The first selection module 601 is configured to select transmission resources for the first M transmissions of service packets by performing resource awareness;

The second selection module 602 is configured to randomly select transmission resources for N transmissions after M times; wherein, N+M is the total number of transmissions of the service package, N≥1, M≥1.

Optionally, the first selection module 601 includes:

The first selection submodule is used to determine Y time slots in the resource selection window, Y≥M;

The second selection submodule is configured to perform resource awareness on subframe y-P for each subframe y in Y to obtain a set of available candidate resources; wherein, P is at least one resource reservation period configured or preconfigured by a high layer;

The third selection submodule is configured to select transmission resources for the first M transmissions of the service package from the set of available candidate resources.

Optionally, the Y is determined according to the service priority and/or the size of the frequency resource occupied by the service package.

Optionally, the time slot interval between at least part of two adjacent transmission resources is greater than the preset duration T3.

Optionally, each transmission of the service packet carries direct link control information SCI, and the SCI carries indication information, and the indication information is used to instruct the terminal not to perform resource preemption evaluation and/or resource preemption evaluation. reassessment.

Optionally, the indication information instructs the terminal not to perform resource preemption evaluation and/or resource re-evaluation by adding a preset bit information field in the SCI.

Optionally, the indication information instructs the terminal not to perform resource preemption evaluation and resource re-evaluation through the service priority carried in the SCI.

The second embodiment of the present invention corresponds to the method of the above-mentioned first embodiment, and all the implementation means in the above-mentioned first embodiment are applicable to the embodiment of the resource selection device, and can also achieve the same technical effect.

third embodiment

In order to better achieve the above purpose, as shown in FIG. 7 , the third embodiment of the present invention also provides a terminal, including:

Processor 700; and a memory 720 connected to the processor 700 through a bus interface, the memory 720 is used to store programs and data used by the processor 700 when performing operations, and the processor 700 calls and executes the Programs and data stored in the memory 720.

Wherein, the transceiver 710 is connected to the bus interface, and is used to receive and send data under the control of the processor 700; the processor 700 is used to read the program in the memory 720 and perform the following steps:

Select transmission resources for the first M transmissions of service packets by performing resource awareness;

Randomly select transmission resources for N transmissions after M times; wherein, N+M is the total number of transmissions of the service package, N≥1, M≥1.

Wherein, in FIG. 7 , the bus architecture may include any number of interconnected buses and bridges, specifically one or more processors represented by the processor 700 and various circuits of the memory represented by the memory 720 are linked together. The bus architecture can also link together various other circuits such as peripherals, voltage regulators, and power management circuits, etc., which are well known in the art and therefore will not be further described herein. The bus interface provides the interface. Transceiver 710 may be a plurality of elements, including a transmitter and a transceiver, providing a means for communicating with various other devices over a transmission medium. For different terminals, the user interface 730 may also be an interface capable of connecting externally and internally to required devices, and the connected devices include but not limited to keypads, displays, speakers, microphones, joysticks, and the like. The processor 700 is responsible for managing the bus architecture and general processing, and the memory 720 can store data used by the processor 700 when performing operations.

Optionally, the selection of transmission resources for the first M transmissions of service packets by performing resource awareness includes:

Determine Y time slots in the resource selection window, Y≥M;

For each subframe y in Y, perform resource awareness on subframe y-P to obtain a set of available candidate resources; where P is at least one resource reservation period configured or preconfigured by the high layer;

In the set of available candidate resources, select transmission resources for the first M transmissions of the service package.

Optionally, the Y is determined according to the service priority and/or the size of the frequency resource occupied by the service package.

Optionally, the time slot interval between at least part of two adjacent transmission resources is greater than the preset duration T3.

Optionally, each transmission of the service packet carries direct link control information SCI, and the SCI carries indication information, and the indication information is used to instruct the terminal not to perform resource preemption evaluation and/or resource preemption evaluation. reassessment.

Optionally, the indication information instructs the terminal not to perform resource preemption evaluation and/or resource re-evaluation by adding a preset bit information field in the SCI.

Optionally, the indication information instructs the terminal not to perform resource preemption evaluation and resource re-evaluation through the service priority carried in the SCI.

The solution provided by the present invention selects transmission resources for the first M transmissions of service packets through perception, and randomly selects the remaining N transmission resources. For multiple transmissions, it can greatly reduce the number of time slots in the resource selection window, taking into account While ensuring transmission reliability, it can significantly improve the power saving efficiency of the terminal.

Those skilled in the art will understand that all or part of the steps in the above embodiments may be implemented by hardware, or may be completed by instructing the relevant hardware through a computer program, the computer program including instructions for executing part or all of the steps of the above methods ; and the computer program can be stored in a readable storage medium, and the storage medium can be any form of storage medium.

In addition, specific embodiments of the present invention also provide a computer-readable storage medium, on which a computer program is stored, and when the program is executed by a processor, the steps of the method in the above-mentioned first embodiment are implemented. And can achieve the same technical effect, in order to avoid repetition, no more details here.

In addition, it should be pointed out that in the device and method of the present invention, obviously, each component or each step can be decomposed and/or reassembled. These decompositions and/or recombinations should be considered equivalents of the present invention. Also, the steps for executing the above series of processes can naturally be executed in chronological order according to the illustrated order, but they are not necessarily executed in chronological order, and some steps can be executed in parallel or independently of each other. For those of ordinary skill in the art, it can be understood that all or any steps or components of the method and device of the present invention can be implemented in any computing device (including a processor, storage medium, etc.) or a network of computing devices in the form of hardware or firmware , software or a combination thereof, which can be realized by those of ordinary skill in the art using their basic programming skills after reading the description of the present invention.

Therefore, the object of the present invention can also be achieved by running a program or a group of programs on any computing device. The computing device may be a known general-purpose device. Therefore, the object of the present invention can also be achieved only by providing a program product including program codes for realizing the method or device. That is, such a program product also constitutes the present invention, and a storage medium storing such a program product also constitutes the present invention. Obviously, the storage medium may be any known storage medium or any storage medium developed in the future. It should also be pointed out that in the device and method of the present invention, obviously, each component or each step can be decomposed and/or reassembled. These decompositions and/or recombinations should be considered equivalents of the present invention. Also, the steps for performing the above series of processes may naturally be performed in chronological order in the order described, but need not necessarily be performed in chronological order. Certain steps may be performed in parallel or independently of each other.

The above description is a preferred embodiment of the present invention, it should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present invention, some improvements and modifications can also be made, and these improvements and modifications can also be made. It should be regarded as the protection scope of the present invention.

Claims (8)

1. A resource selection method, characterized in that it is applied to a terminal, comprising: Select transmission resources for the first M transmissions of service packets by performing resource awareness, including: determining Y time slots in the resource selection window, Y≥M; Sensing, obtaining a set of available candidate resources, where P is at least one resource reservation period configured or preconfigured by a high-level layer; in the set of available candidate resources, selecting transmission resources for the first M transmissions of the service package; Randomly select transmission resources for N transmissions after M times; wherein, N+M is the total number of transmissions of the service package, N≥1, M≥1; The Y is determined according to the service priority and/or the size of the frequency resource occupied by the service package. 2. The resource selection method according to claim 1, characterized in that at least part of the time slot interval between two adjacent transmission resources is greater than the preset duration T3. 3. The resource selection method according to claim 1, wherein each transmission of the service packet carries direct link control information SCI, and the SCI carries indication information, and the indication information is used for Instructing the terminal not to perform resource preemption evaluation and/or resource re-evaluation. 4. The resource selection method according to claim 3, wherein the indication information instructs the terminal not to perform resource preemption evaluation and/or resource re-evaluation by adding a preset bit information field in the SCI. 5. The resource selection method according to claim 3, wherein the indication information instructs the terminal not to perform resource preemption evaluation and resource re-evaluation through the service priority carried in the SCI. 6. A terminal, comprising: a transceiver, a memory, a processor, and a computer program stored on the memory and operable on the processor, characterized in that, when the processor executes the computer program, the computer program according to claim 1 is realized. Steps of the resource selection method described in any one of to 5. 7. A resource selection device, characterized in that it is applied to a terminal, comprising: The first selection module is used to select transmission resources for the first M transmissions of service packets by performing resource awareness; wherein, Y timeslots are determined in the resource selection window, Y≥M; for each subframe y in Y , perform resource awareness on the subframe y-P to obtain a set of available candidate resources, P is at least one resource reservation period configured or preconfigured by the high-level layer; in the set of available candidate resources, select transmission for the first M transmissions of the service package resource; The second selection module is used to randomly select transmission resources for N transmissions after M times; wherein, N+M is the total number of transmissions of the service package, N≥1, M≥1; The Y is determined according to the service priority and/or the size of the frequency resource occupied by the service package. 8. A computer-readable storage medium, on which a computer program is stored, wherein when the computer program is executed by a processor, the steps of the resource selection method according to any one of claims 1 to 5 are realized.

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