Resource coexistence method and apparatus

Abstract

An embodiment of the present invention provides a resource coexistence method and apparatus, including a step of a first node determining a time-frequency resource of LTE V2X or NR V2X to be used by a reporting manner or an autonomous manner. In the embodiment of the present invention, the first node determines a time-frequency resource of LTE V2X or NR V2X to be used by a reporting manner or an autonomous manner, thereby avoiding resource contention or interference that occurs during resource coexistence of LTE V2X and NR V2X.

Description

Technical Field

[0001] Embodiments of the present invention relate to the field of communications, and more specifically, to resource coexistence methods and apparatuses.

Background Art

[0002] With the continuous advancement of wireless technology, a large number of various wireless services have emerged. LTE (Long Term Evolution) and NR (New Radio) systems include not only cellular services between base stations and terminals, but also, for example, V2X (Vehicle to anything) services, which are abbreviated as LTE V2X, LTE-V, or LTE Sidelink in LTE, and NR V2X, NR-V, or NR Sidelink in NR. The link for V2X service communication is called an SL (Side link), and when it is necessary to transmit services between devices, the service data between devices is not transferred via other network equipment, but is transmitted directly from the data source device to the target device, that is, communication takes place directly between devices, and the device is a UE (User Equipment) with V2X functionality. SL can be classified into three main types of communication scenarios: the first type (incoverage) where both the data source equipment and the target equipment are within the base station's coverage; the second type (partial coverage) where one of the data source equipment or the target equipment is within the base station's coverage but the other is outside of it; and the third type (out of coverage) where both the data source equipment and the target equipment are outside of the base station's coverage.Sidelink (SL) can be classified into two main communication modes: a first mode (abbreviated as Mode 3 in LTE and Mode 1 in NR) in which the resources for the device to transmit sidelink signals originate from the base station's scheduling, and a second mode (abbreviated as Mode 4 in LTE and Mode 2 in NR) in which the device autonomously selects resources in the resource pool based on a resource selection policy within the network-configured or pre-configured resource pool. The resource selection policy mainly includes sensing mechanisms, partial sensing mechanisms, and random selection mechanisms.

[0003] In the latest V2X deployment scenarios for NR systems, it is necessary to consider that LTE V2X and NR V2X equipment will coexist within the same frequency resource. The same frequency resource generally refers to the same carrier, the same frequency band, etc. To allow two different types of equipment to coexist within the same frequency resource, a mechanism is needed that effectively utilizes the resource without negatively impacting the operation of both devices and avoids interference that occurs when resources coexist. [Overview of the project] [Problems that the invention aims to solve]

[0004] Embodiments of the present invention provide a resource coexistence method and apparatus to at least solve the resource competition or interference problem caused by the coexistence of LTE V2X and NR V2X within the same frequency resource in related technologies. [Means for solving the problem]

[0005] According to one embodiment of the present invention, a resource coexistence method is provided which includes the step of a first node determining the time-frequency resources of LTE V2X or NR V2X to be used by a reporting method or an autonomous method.

[0006] According to another embodiment of the present invention, a resource coexistence device is provided which includes a determination module that is configured to determine the time-frequency resources of the LTE V2X or NR V2X to be used by a reporting method or an autonomous method.

[0007] Another embodiment of the present invention further provides a computer-readable storage medium that stores a computer program which, when executed, is configured to perform the steps in any one of the above method embodiments.

[0008] Another embodiment of the present invention further provides an electronic device comprising a memory and a processor, wherein the memory stores a computer program, and the processor is configured to perform the steps in any one of the above method embodiments by executing the computer program. [Brief explanation of the drawing]

[0009] [Figure 1] This is a block diagram showing the hardware structure of a mobile terminal that implements the resource coexistence method according to an embodiment of the present invention. [Figure 2] This is a flowchart of a resource coexistence method according to an embodiment of the present invention. [Figure 3] This is a flowchart of the reporting method according to an embodiment of the present invention. [Figure 4] This is a flowchart of another reporting method according to an embodiment of the present invention. [Figure 5] This is a schematic flowchart of an autonomous method according to an embodiment of the present invention. [Figure 6] This figure shows the modular structure of a resource coexistence device according to an embodiment of the present invention. [Modes for carrying out the invention]

[0010] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. Furthermore, terms such as "first," "second," etc., in the specification, claims, and drawings of the present invention are used to distinguish similar objects and are not intended to describe a specific order or sequence.

[0011] The method embodiments provided in the embodiments of the present application can be implemented on a mobile terminal, a computer terminal, or a similar computing device. Taking implementation on a mobile terminal as an example, Figure 1 is a block diagram showing the hardware structure of a mobile terminal implementing the resource coexistence method according to an embodiment of the present invention. As shown in Figure 1, the mobile terminal may include one or more (only one is shown in Figure 1) processors 102 (the processors 102 include, but are not limited to, processing units such as a microprocessor MCU or a programmable logic device FPGA) and memory 104 for storing data, but the mobile terminal may further include a transmission device 106 and an input / output device 108 used for communication functions. As will be understood by those skilled in the art, the structure shown in Figure 1 is merely illustrative and does not limit the structure of the mobile terminal. For example, the mobile terminal may further include more or fewer components than those shown in Figure 1, or may have a different configuration than that shown in Figure 1.

[0012] Memory 104 is used to store computer programs, such as software programs and modules of application software, including computer programs corresponding to the resource coexistence method in embodiments of the present invention. The processor 102 executes various functional applications and data processing by executing the computer programs stored in memory 104, thereby realizing the above method. Memory 104 may include high-speed random-access memory, or non-volatile memory, such as one or more magnetic storage devices, flash memory, or other non-volatile solid-state memory. In some specific examples, memory 104 may further include memory installed remotely from the processor 102, and these remote memories can be connected to a mobile terminal via a network. Specific examples of the network include, but are not limited to, the Internet, intranets, local area networks, mobile communication networks, and combinations thereof.

[0013] The transmission device 106 is used to send and receive data over a network. Specific examples of the network may include a wireless network provided by a mobile terminal's communication supplier. In one specific example, the transmission device 106 includes a network adapter (Network Interface Controller, abbreviated as NIC) that is connected to other network devices via a base station and can communicate with the Internet. In another specific example, the transmission device 106 may be a radio frequency (RF) module for wirelessly communicating with the Internet.

[0014] In this embodiment, a resource coexistence method is provided that is executed on the above-mentioned mobile terminal. Figure 2 is a flowchart of the method according to an embodiment of the present invention, and as shown in Figure 2, the flow includes the following steps.

[0015] Step S202: The first node determines the LTE V2X or NR V2X time-frequency resources to be used, either through a reporting method or a self-declaration method.

[0016] In this embodiment, the reporting method may include the methods shown in FIGS. 3 and 4. As shown in FIG. 3, the reporting method includes the following steps.

[0017] S302: The first node reports to the second node, and the content of the report may include whether there is a resource conflict, the type of resource conflict, whether there is interference, the type of interference, the level of interference, the position of the interference time-frequency resource, the position of the desired or candidate time-frequency resource, whether to reduce the desired power, and one of the absolute value or relative value of the power reduction of the desired power.

[0018] S304: The second node reconfigures or reselects the time-frequency resource of LTE V2X or NR V2X.

[0019] As shown in FIG. 4, the reporting method includes the following steps. S402: The physical layer of the first node reports to the upper layer of the first node, and the content of the report may include whether there is a resource conflict, the type of resource conflict, whether there is interference, the type of interference, the level of interference, the position of the interference time-frequency resource, the position of the desired or candidate time-frequency resource, whether to reduce the desired power, and one of the absolute value or relative value of the power reduction of the desired power.

[0020] S404: The upper layer of the first node reconfigures or reselects the time-frequency resource of LTE V2X or NR V2X.

[0021] In this embodiment, the type of the resource conflict includes at least one of the conflicts between the LTE V2X transmission resource and the NR V2X transmission resource, the conflict between the LTE V2X transmission resource and the NR V2X reception resource, the conflict between the LTE V2X reception resource and the NR V2X transmission resource, and the conflict between the LTE V2X reception resource and the NR V2X reception resource.

[0022] In this embodiment, the type of interference includes at least one of interference from NR V2X to LTE V2X and interference from LTE V2X to NR V2X.

[0023] In one exemplary embodiment, the interference level is classified by classifying one or more interference levels based on one or more thresholds, where the thresholds include at least one of received signal power and received signal strength.

[0024] In one exemplary embodiment, when LTE V2X and NR V2X coexist in a TDM (Time Division Multiplexing) mode, if there is resource contention or interference between LTE V2X and NR V2X, one set of NR V2X time resources is selected from multiple sets of pre-set NR V2X time resources. The classified time resources may include those used only by LTE V2X, those used only by NR V2X, and those shared by LTE V2X and NR V2X. The granularity of the time resources includes at least one of short slots, slots, sub-frames, half-frames, and radio frames.

[0025] In one exemplary embodiment, when LTE V2X and NR V2X TDM coexist in an FDM (Frequency Division Multiplexing) mode, if there is resource contention or interference between LTE V2X and NR V2X, one set of NR V2X frequency resources is selected from multiple sets of pre-set NR V2X frequency resources. The classified frequency resources may include those used only by LTE V2X, those used only by NR V2X, and those shared by LTE V2X and NR V2X. The granularity of the frequency resources includes at least one of resource blocks, resource block groups, bandwidth parts, sub-channels, sub-bands, carriers, and frequency bands.

[0026] In one exemplary embodiment, when LTE V2X and NR V2X employ frequency division multiplexing coexistence, power is allocated to LTE V2X and NR V2X using one of the following methods: determining power allocation based on the priority of LTE V2X and NR V2X; allocating power alternately to LTE V2X and NR V2X; allocating power with priority to LTE V2X; and allocating power with priority to NR V2X.

[0027] In this embodiment, if there is a resource conflict or available resources between LTE V2X and NR V2X, the first node may determine which resources to use by an autonomous method. As shown in Figure 5, this autonomous method includes the following steps.

[0028] S502: Determine if there is a resource conflict or available resources for LTE V2X and NR V2X.

[0029] S504: The first node independently determines the resources it will use. Specifically, in one embodiment, the NR V2X module of the first node monitors the NR V2X SCI of other nodes and notifies the LTE V2X module of the first node of the location of available time-frequency resources, and the LTE V2X module of the first node uses the available time-frequency resources.

[0030] In another exemplary embodiment, the step of determining the LTE V2X or NR V2X time-frequency resources to be used autonomously by a first node includes the steps of the first node's NR V2X module monitoring the LTE V2X SCI of other nodes to obtain available time-frequency resources, and the first node's NR V2X module using the available time-frequency resources.

[0031] In another exemplary embodiment, the step of determining the LTE V2X or NR V2X time-frequency resources to be used autonomously by the first node includes the step of selecting one set of NR V2X time resources from a set of pre-configured NR V2X time resources if resource contention or interference exists between LTE V2X and NR V2X.

[0032] In the above embodiment of the present invention, when LTE V2X and NR V2X coexist within the same frequency resource, the first node can avoid resource contention or interference that occurs when LTE V2X and NR V2X resources coexist by determining the time-frequency resource of LTE V2X or NR V2X to be used by a reporting method or an autonomous method, and can further solve problems such as power sharing, power control, and power adjustment reporting during coexistence.

[0033] The present invention will be described in detail below with reference to specific examples in order to facilitate understanding of the technical concepts provided by this invention.

[0034] Example 1 In this embodiment, LTE V2X and NR V2X coexist using the TDM method, and if resource contention occurs between LTE V2X and NR V2X, the time resources for LTE V2X and NR V2X are reconfigured or reselected.

[0035] In this embodiment, there are multiple sets of pre-configured NR V2X time resources, and if a resource conflict exists between LTE V2X and NR V2X, a different set of time resources can be selected for the NR V2X experiencing the resource conflict.

[0036] In this embodiment, the time resources can be divided into three types, corresponding to use only for LTE V2X, use only for NR V2X, and sharing for both LTE V2X and NR V2X.

[0037] In this embodiment, the granularity of time resources is preferably short slots (mini-slot, short-slot), slots, subframes, half-frames, and wireless frames.

[0038] Example 2 In this embodiment, LTE V2X and NR V2X coexist using the FDM method, and if resource conflicts exist between LTE V2X and NR V2X, the frequency resources for LTE V2X and NR V2X are reconfigured or reselected.

[0039] In this embodiment, there are multiple sets of pre-configured NR V2X frequency resources, and if resource conflict exists between LTE V2X and NR V2X, the NR V2X can avoid resource conflict by selecting a different set of frequency resources.

[0040] In this embodiment, the frequency resource area can be divided into three types, corresponding to use only for LTE V2X, use only for NR V2X, and shared use for both LTE V2X and NR V2X.

[0041] In this embodiment, the granularity of frequency resources is preferably resource block, resource block group, bandwidth part, subchannel, subband, carrier, and band.

[0042] In this example, when LTE V2X and NR V2X coexist using FDM, power allocation is as follows: One method determines power allocation based on the priority of LTE V2X and NR V2X, that is, it allocates power preferentially to V2X with higher priority. One method involves allocating power alternately to LTE V2X and NR V2X, meaning that if power was prioritized to one V2X (LTE V2X or NR V2X) in the previous instance, it will prioritize to a different V2X in the next instance. A method of allocating power with priority to LTE V2X, One of the methods for allocating power with priority to NR V2X will be adopted.

[0043] Example 3 In this embodiment, resource contention or interference caused by resource coexistence between LTE V2X and NR V2X is resolved with the assistance of the device.

[0044] Specifically, the second device measures the service load status and reports it to the first device (base station or terminal device), or the physical layer of the second device reports to a higher layer above the physical layer of the second device, and the higher layer of the first or second device reconfigures or reselects LTE V2X and NR V2X resources.

[0045] In this embodiment, the service load status can be determined by measuring the CBR (Channel Busy Ratio) or evaluating the CR (Channel Occupancy Ratio).

[0046] In this embodiment, the information reported by the second device may include whether or not resource contention exists, the type of resource contention, whether or not interference exists, the type of interference, the level of interference, the location of the interfering time-frequency resource, the location of the desired or candidate time-frequency resource, whether or not the desired power is reduced, and one of the absolute or relative power values ​​of the reduction in the desired power.

[0047] Example 4 In this embodiment, to resolve resource contention or interference caused by resource coexistence between LTE V2X and NR V2X, available resources are used for LTE V2X.

[0048] Specifically, the NR V2X module decodes the SCI for scheduling NR V2X and determines whether there are available resources for subsequent resources based on the monitoring results. The LTE V2X module then obtains the monitoring results, for example, whether there are available sub-channel resources, and if so, uses these resources to perform LTE V2X transmission.

[0049] Alternatively, the NR V2X module decodes the SCI of the NR V2X from other nodes, the LTE V2X module decodes the SCI of the LTE V2X from other nodes, the NR V2X module merges the monitoring results, and the LTE V2X module obtains the monitoring results, for example, whether or not available subchannel resources exist, and if they exist, uses these resources to perform LTE V2X transmission.

[0050] Example 5: Use of available resources for NR V2X In this embodiment, the NR V2X module decodes the SCI for scheduling LTE V2X, and based on the monitoring results, determines whether there are available resources for subsequent resources, for example, whether there are available sub-channel resources. If available, it uses these resources to perform NR V2X transmission.

[0051] Alternatively, the NR V2X module decodes the SCI of the LTE V2X of other nodes, the NR V2X module decodes the SCI of the NR V2X of other nodes, the LTE V2X module decodes the SCI of the LTE V2X of other nodes, the NR V2X module merges the monitoring results, and based on the monitoring results, the NR V2X module determines whether there are available resources for subsequent resources, for example, whether there are available subchannel resources, and if so, uses these resources to perform NR V2X transmission.

[0052] In the above embodiments of the present invention, SCI decoding, SCI monitoring, and sensing are all equivalent concepts.

[0053] From the above description of embodiments, those skilled in the art will clearly understand that the methods according to the above embodiments can be realized by a combination of software and a necessary general-purpose hardware platform, and of course, by hardware alone, but in many cases the former is a more preferred embodiment. Based on this understanding, the technical proposal of the present invention can be essentially or partially embodied in the form of a software product, which is stored on a storage medium (e.g., ROM / RAM, magnetic disk, optical disk) and includes some instructions for causing a terminal device (which may be a mobile phone, computer, server, or network device, etc.) to perform the method according to each embodiment of the present invention.

[0054] This embodiment further provides resource coexistence devices for realizing the above embodiment and preferred embodiments, and omits further explanation of what has already been described. The term "module" as used below can realize a combination of software and / or hardware with a predetermined function. The devices described in the following embodiments are preferably realized by software, but can also be realized by hardware, or a combination of software and hardware, and may be conceived.

[0055] Figure 6 is a block diagram showing the modular structure of a resource coexistence device according to an embodiment of the present invention, and as shown in Figure 6, the device 100 includes a fixed module 10.

[0056] The determination module 10 is provided to determine the time-frequency resources of the LTE V2X or NR V2X to be used, either through a reporting method or a self-determining method.

[0057] In this embodiment, the report may include whether or not resource contention exists, the type of resource contention, whether or not interference exists, the type of interference, the level of interference, the location of the interfering time-frequency resource, the location of the desired or candidate time-frequency resource, whether or not the desired power is reduced, and one of the absolute or relative power values ​​of the reduction in the desired power.

[0058] In this embodiment, the type of resource contention includes at least one of the following: contention between LTE V2X transmission resources and NR V2X transmission resources; contention between LTE V2X transmission resources and NR V2X reception resources; contention between LTE V2X reception resources and NR V2X transmission resources; and contention between LTE V2X reception resources and NR V2X reception resources.

[0059] Each of the above modules can be implemented by software or hardware, and in the latter case, they can be implemented in a manner in which all of the modules are located within the same processor, or in a manner in which each of the modules is located within different processors in any combination.

[0060] Embodiments of the present invention further provide a computer-readable storage medium that stores a computer program which, when executed, is configured to perform the steps in any one of the above-described method embodiments.

[0061] In one exemplary embodiment, the computer-readable storage medium described above may be, but is not limited to, various computer program storage media such as USB disks, read-only memory (ROM), random access memory (RAM), removable hard disks, magnetic disks, or optical disks.

[0062] Embodiments of the present invention further provide an electronic device comprising a memory and a processor, wherein a computer program is stored in the memory, and the processor is configured to perform the steps in any one of the above method embodiments by executing the computer program.

[0063] In one exemplary embodiment, the electronic device may further include a transmission device connected to the processor and an input / output device connected to the processor.

[0064] Specific examples in this embodiment can be found by referring to the examples described in the above embodiment and the exemplary embodiment, so repeated explanations will be omitted in this embodiment.

[0065] As those skilled in the art will understand, each module or step in the above embodiments of the present invention can be implemented by a general-purpose computing device, centralized in a single computing device, or distributed across a network of multiple computing devices, and can be implemented by program code executable by the computing device, which can then be stored in a memory device and executed by the computing device, and in some cases the steps shown or described can be executed in an order different from the order herein, or they can be implemented by creating each of them in separate integrated circuit modules, or by creating multiple modules or steps of them in a single integrated circuit module. Thus, the present invention is not limited to any particular combination of hardware and software.

[0066] The foregoing are merely preferred embodiments of the present invention and do not limit it, and those skilled in the art can make various modifications and changes to the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the principles of the present invention should all be within the scope of protection of the present invention.

Claims

1. The first node includes the step of determining the time-frequency resources of the LTE V2X or NR V2X to be used by a reporting or voluntary method, The reporting method includes reporting from the first node to the second node, or reporting from the physical layer of the first node to the upper layer of the first node. If resource contention or interference exists between LTE V2X and NR V2X, the upper layer of the second node or the first node selects one set of NR V2X time resources from multiple sets of pre-configured NR V2X time resources, or the upper layer of the second node or the first node selects one set of NR V2X frequency resources from multiple sets of pre-configured NR V2X frequency resources. A resource coexistence method characterized by the following.

2. The contents of the report are: Whether or not resource contention exists, Types of resource contention, Whether or not interference exists, Type of interference, Interference level, Location of the time-frequency resource of interference, Location of desired or candidate time-frequency resources, Whether or not to reduce the desired power, The desired power reduction includes at least one of either the absolute power value or the relative power value. The method according to feature 1.

3. The type of resource conflict includes at least one of the following: a conflict between an LTE V2X transmission resource and an NR V2X transmission resource; a conflict between an LTE V2X transmission resource and an NR V2X reception resource; a conflict between an LTE V2X reception resource and an NR V2X transmission resource; or a conflict between an LTE V2X reception resource and an NR V2X reception resource. The method according to feature 2.

4. The type of interference includes at least one of interference from NR V2X to LTE V2X, and interference from LTE V2X to NR V2X. The method according to feature 2.

5. The level of interference is classified into one or more interference levels based on one or more thresholds. The threshold includes at least one of the received signal power and the received signal strength. The method according to feature 2.

6. The segmented time resources include those used exclusively by LTE V2X, those used exclusively by NR V2X, and those shared by both LTE V2X and NR V2X. The method according to feature 1.

7. The granularity of time resources includes at least one of the following: short slot, slot, subframe, half frame, and wireless frame. The method according to feature 6.

8. The segmented frequency resources include those used exclusively for LTE V2X, those used exclusively for NR V2X, and those shared by both LTE V2X and NR V2X. The method according to feature 1.

9. The granularity of frequency resources includes at least one of the following: resource blocks, resource block groups, partial bandwidths, subchannels, subbands, carriers, and frequency bands. The method according to feature 8.

10. When LTE V2X and NR V2X employ frequency division multiplexing for coexistence, A method for determining power allocation based on the priority of LTE V2X and NR V2X, A method of allocating power alternately to LTE V2X and NR V2X with priority, A method of allocating power with priority to LTE V2X, One of the methods for allocating power with priority to NR V2X is to allocate power to LTE V2X and NR V2X. The method according to feature 2.

11. The first node autonomously determines the time-frequency resources of the LTE V2X or NR V2X to be used. If resource contention or interference exists between LTE V2X and NR V2X, the process includes the step of selecting one set of NR V2X time resources from multiple pre-configured sets of NR V2X time resources. The method according to feature 1.

12. The first node autonomously determines the time-frequency resources of the LTE V2X or NR V2X to be used. The NR V2X module of the first node monitors the NR V2X SCI of other nodes and notifies the LTE V2X module of the first node of the location of available time-frequency resources. The LTE V2X module of the first node includes the step of using the available time-frequency resources, The method according to feature 1.

13. The first node autonomously determines the time-frequency resources of the LTE V2X or NR V2X to be used. The NR V2X module of the first node monitors the LTE V2X SCI of other nodes to obtain available time-frequency resources, The NR V2X module of the first node includes the step of using the available time-frequency resources, The method according to feature 1.

14. A computer-readable storage medium on which computer programs are stored, When the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 13 are realized. A computer-readable storage medium characterized by the following features.

15. It includes memory, a processor, and a computer program stored in the memory and executable by the processor, When the processor executes the computer program, the steps of the method according to any one of claims 1 to 13 are realized. An electronic device characterized by the following features.

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