CN115701157A

CN115701157A - Resource selection method and communication device

Info

Publication number: CN115701157A
Application number: CN202110871775.6A
Authority: CN
Inventors: 沈兴亚
Original assignee: Spreadtrum Communications Shanghai Co Ltd
Current assignee: Spreadtrum Communications Shanghai Co Ltd
Priority date: 2021-07-30
Filing date: 2021-07-30
Publication date: 2023-02-07
Also published as: WO2023005144A1

Abstract

The embodiment of the application discloses a resource selection method and a communication device. In the method, a terminal detects the Received Signal Strength Indicator (RSSI) on a first resource, and excludes resources in a first candidate resource set according to the RSSI of the first resource to obtain a second candidate resource set; the terminal then selects resources from the second set of candidate resources for sidelink communications. Therefore, the terminal can eliminate the unoccupied resources through the RSSI, for example, eliminate the resources suffering from the serious adjacent band interference from the unoccupied resources, so that the terminal does not select the resources suffering from the serious adjacent band interference for link communication, which is beneficial to reducing the influence caused by the adjacent band interference amplified by the near-far effect.

Description

Resource selection method and communication device

Technical Field

The present application relates to the field of communications technologies, and in particular, to a resource selection method and a communications apparatus.

Background

The method works in the design of a New Radio in Unlicensed Spectrum (NR-U) system, and introduces a structure of an Inter Resource Block (IRB) of comb teeth in order to meet the regulatory requirement of the Unlicensed Spectrum. As shown in fig. 1, 5 IRB resources are configured in fig. 1, a number in a box represents an IRB index, a first symbol in a slot is an Automatic Gain Control (AGC) symbol, and a last symbol is a Guard Period (GP) symbol. In fig. 1, IRB0 and IRB1 are occupied by a physical side link shared Channel 1 (PSCCH), and IRB0 is occupied by a corresponding physical side link Control Channel 1 (PSCCH). Psch 2 occupies IRB2, and its corresponding PSCCH2 also occupies IRB2. Adjacent IRBs have adjacent band interference, for example, in fig. 1, IRB2 may generate adjacent band interference to IRB3 or IRB 1. Since the transmission power of different PSSCH channels may be different, which causes near-far effect, the adjacent band interference will be amplified. When unlicensed spectrum is used in Sidelink (Sidelink) communication systems, regulatory requirements on unlicensed spectrum also need to be met. Therefore, the structural design of the IRB in the existing NR-U system can be introduced into a Sidelink in Unlicensed Spectrum (SL-U) communication system, so that the Sidelink communication system can operate in Unlicensed Spectrum and meet the corresponding regulatory requirements.

In an SL-U communication system, if a User Equipment (UE) is close to each other and an adjacent IRB is selected to transmit data, a serious near-far effect is caused. For example, as shown in fig. 2, UE1 occupies IRB2 to communicate with UE3, and UE2 occupies IRB3 to communicate with UE 4. Since the IRB2 will have adjacent band interference on the IRB3, if the transmission power of the UE2 is much smaller than that of the UE1, or the UE2 is close to the UE1, the signal sent by the UE1 to the UE3 will cause serious interference to the signal sent by the UE2 to the UE4, which is called near-far effect. Therefore, how to reduce the influence of the adjacent band interference amplified by the near-far effect becomes a problem to be solved.

Disclosure of Invention

The embodiment of the application provides a resource selection method and a communication device, which are beneficial to reducing the influence caused by adjacent band interference amplified by a near-far effect.

In a first aspect, an embodiment of the present application provides a resource selection method, where the method includes:

detecting a Received Signal Strength Indication (RSSI) on a first resource, wherein the first resource is a resource in a first candidate resource set, and the resource in the first candidate resource set is used for side link communication;

removing resources in the first candidate resource set according to the RSSI of the first resource to obtain a second candidate resource set;

selecting resources from the second set of candidate resources for sidelink communications.

Based on the description of the first aspect, the terminal may remove unoccupied resources in the first candidate resource set according to the RSSI, for example, remove resources that are subjected to severe adjacent band interference from the first candidate resource set, so that the terminal does not select the resources that are subjected to severe adjacent band interference for link communication, which is beneficial to reducing the influence caused by the adjacent band interference amplified by the near-far effect.

In an alternative embodiment, the first resource is an unoccupied resource in the first candidate resource set.

In an optional embodiment, the first resource is a resource adjacent to a second resource in a frequency domain, and the second resource satisfies at least one of the following conditions: occupied, reference signal received power, RSRP, greater than a first threshold, has been excluded from the first set of candidate resources. Because the second resource and the adjacent resource of the second resource have adjacent band interference, and the transmission powers of different physical Sidelink shared Channel (pscch) channels may be different, when the second resource is an occupied resource, a near-far effect may be caused when the adjacent resource of the second resource is selected for Sidelink communication, and the adjacent band interference will be amplified. Therefore, the RSSI measurement needs to be performed on the adjacent resource of the second resource, so as to reduce the influence of the adjacent band interference amplified by the near-far effect. Meanwhile, only the adjacent resource of the second resource needs to be subjected to RSSI measurement, so that the power consumption can be saved.

In an optional embodiment, the first resource and the second resource are comb-shaped resource blocks IRB.

In an optional implementation manner, when the RSSI on the first resource is greater than the second threshold, the first resource is excluded from the first candidate resource set, and a second candidate resource set is obtained.

In an optional embodiment, if the RSSI of all the first resources is greater than the second threshold, comparing the RSSI of all the first resources with a third threshold, where the third threshold is greater than the second threshold; if the RSSI on part of the first resources is greater than a third threshold value, excluding the first resources with the RSSI greater than the third threshold value from the first candidate resource set; if the RSSI on all the first resources is larger than a third threshold value, comparing the RSSI on all the first resources with a fourth threshold value, wherein the fourth threshold value is larger than the third threshold value; and if the RSSI on the part of the first resources is larger than the fourth threshold value, excluding the first resources with the RSSI larger than the fourth threshold value from the first candidate resource set.

In an alternative embodiment, the first threshold is configured by higher layer signaling, or the first threshold is predefined by a protocol.

In an alternative embodiment, the second threshold, the third threshold and the fourth threshold are configured by higher layer signaling, or the second threshold, the third threshold and the fourth threshold are predefined by a protocol.

In an alternative embodiment, a linear average of the received power on one or more physical resource blocks within one symbol on the first resource is detected; or, detecting a linear average of received power at one or more IRBs within one symbol on the first resource; or, detecting a linear average value of the received power in a given bandwidth in a symbol on the first resource; or, detecting a linear average of received power in a given subchannel within one symbol on the first resource, wherein the subchannel includes one or more physical resource blocks.

In a second aspect, an embodiment of the present application provides a resource selection apparatus, including:

a detecting unit, configured to detect a Received Signal Strength Indicator (RSSI) on a first resource, where the first resource is a resource in a first candidate resource set, and the resource in the first candidate resource set is used for sidelink communication;

the excluding unit is used for excluding the resources in the first candidate resource set according to the RSSI of the first resources to obtain a second candidate resource set;

and the selecting unit is used for selecting resources from the second candidate resource set for side link communication.

In an optional embodiment, the first resource is a resource adjacent to a second resource in a frequency domain, and the second resource satisfies at least one of the following conditions: occupied, reference signal received power, RSRP, greater than a first threshold, has been excluded from the first set of candidate resources.

In an optional implementation manner, the first resource and the second resource are comb-tooth resource blocks IRB.

In an optional implementation manner, the resource selection apparatus further includes a comparing unit, where if the RSSI of all the first resources is greater than the second threshold, the comparing unit is configured to compare the RSSI of all the first resources with a third threshold, and the third threshold is greater than the second threshold; if the RSSI of the part of the first resources is greater than the third threshold, the excluding unit is further configured to exclude the first resources whose RSSI is greater than the third threshold from the first candidate resource set; if the RSSI of all the first resources is greater than the third threshold, the comparing unit is further configured to compare the RSSI of all the first resources with a fourth threshold, where the fourth threshold is greater than the third threshold; the excluding unit is further configured to exclude the first resource with RSSI greater than the fourth threshold from the first candidate resource set if the RSSI on the part of the first resource is greater than the fourth threshold.

In an optional implementation manner, the detecting unit is further configured to detect a linear average of received power on one or more physical resource blocks in one symbol on the first resource; or, the first resource is further configured to detect a linear average of received power at one or more IRBs within one symbol on the first resource; or, the method is further configured to detect a linear average of received power within a given bandwidth within one symbol on the first resource; or, the method is further configured to detect a linear average of received power in a given subchannel in a symbol on the first resource, wherein the subchannel includes one or more physical resource blocks.

In a third aspect, an embodiment of the present application provides a chip, where the chip includes a processor and a data interface, and the processor reads instructions stored on a memory through the data interface to perform the method according to the first aspect.

In a fourth aspect, an embodiment of the present application provides a chip module, where the chip module includes the chip as described in the third aspect.

In a fifth aspect, the present embodiments provide a computer-readable storage medium storing a computer program, the computer program comprising program instructions that, when executed by a processor, cause the processor to perform the method according to the first aspect.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the embodiments or the prior art descriptions will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative efforts.

Fig. 1 is a schematic diagram of a comb resource block structure according to an embodiment of the present application;

fig. 2 is a schematic structural diagram of a sidelink communication system provided in an embodiment of the present application;

fig. 3 is a schematic flowchart of a resource selection method according to an embodiment of the present application;

fig. 4 is a schematic structural diagram of a resource selection apparatus according to an embodiment of the present application;

fig. 5 is a schematic structural diagram of a terminal according to an embodiment of the present application.

Detailed Description

The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application.

It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, a reference to an element identified by the phrase "comprising one of 82308230a of 82303030, or an element defined by the phrase" comprising another identical element does not exclude the presence of the same element in a process, method, article, or apparatus comprising the element, and elements having the same designation may or may not have the same meaning in different embodiments of the application, the particular meaning being determined by its interpretation in the particular embodiment or by further reference to the context of the particular embodiment.

The technical scheme of the application can be applied to a side link communication system of fifth generation mobile communication (5Th Generation, 5G), or a side link communication system of sixth generation mobile communication (6Th Generation, 6G) or other future side link communication systems.

In the embodiment of the present application, a terminal may refer to various forms of User Equipment (UE), an access terminal, a subscriber unit, a subscriber Station, a Mobile Station (MS), a remote Station, a remote terminal, a Mobile device, a User terminal, a wireless communication device, a User agent, or a User Equipment. The terminal may also be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA), a handheld device with a Wireless communication function, a computing device or other processing devices connected to a Wireless modem, a vehicle-mounted device, a wearable device, a terminal in a 5G Network, or a terminal in a Public Land Mobile Network (PLMN) for future evolution, and the like, which is not limited in this embodiment.

Referring to fig. 2, fig. 2 is a schematic structural diagram of a Sidelink (Sidelink) communication system according to an embodiment of the present disclosure. The sidelink communication system may include, but is not limited to, one or more terminals, and the sidelink communication system shown in fig. 2 takes a user equipment 1, a user equipment 2, a user equipment 3, and a user equipment 4 as an example, where the user equipment 1, the user equipment 2, the user equipment 3, and the user equipment 4 may establish a sidelink with each other for communication. The number and configuration of the devices shown in fig. 2 are for example and do not constitute a limitation on the embodiments of the present application.

The method works in the design of a New Radio in Unlicensed Spectrum (NR-U) system, and in order to meet the regulatory requirements of the Unlicensed Spectrum, a structure of an Inter Resource Block (IRB) is introduced, wherein one comb Resource Block comprises 10 or 11 physical Resource blocks, and two continuous available physical Resource blocks are separated by M physical Resource blocks, wherein M is a positive integer. For example, two Physical Resource Blocks (PRBs) may be separated by M IRBs, and then, for index M of the IRBs, the corresponding index of PRBs is { M, M + M,2M + M,3M + M, \8230 }, where M ∈ {0,1, \8230, M-1}. In the NR-U system, IRB structures are defined for two subcarrier spacings of 15kHz and 30kHz, respectively, as shown in table 1:

subcarrier spacing	M
		15khz
	10
		30khz	5

When the sidelink communication system shown in fig. 2 operates on the unlicensed spectrum, it is also required to meet the regulatory requirements of the unlicensed spectrum. Therefore, the structural design of the IRB in the existing NR-U system can be introduced into a Sidelink in Unlicensed Spectrum (SL-U) communication system operating in Unlicensed Spectrum. For example, the structure of an IRB in an SL-U system is shown in fig. 1, 5 IRB resources are configured in fig. 1, a number in a box represents an IRB index, a first symbol in a slot is an Automatic Gain Control (AGC) symbol, and a last symbol is a Guard Period (GP) symbol. In fig. 1, IRB0 and IRB1 are occupied by a physical side link shared Channel 1, and IRB0 is occupied by a corresponding physical side link Control Channel 1 (PSCCH). Psch 2 occupies IRB2, and its corresponding PSCCH2 also occupies IRB2. Adjacent IRBs have adjacent band interference, for example, in fig. 1, IRB2 may generate adjacent band interference to IRB3 or IRB 1. Since the transmission power of different PSSCH channels may be different, which causes near-far effect, the adjacent band interference will be amplified.

In an SL-U communication system, if the distance between user equipments is short and an adjacent IRB is selected to transmit data, a serious near-far effect is caused. For example, as shown in fig. 2, UE1 occupies IRB2 to communicate with UE3, and UE2 occupies IRB3 to communicate with UE 4. Since the IRB2 will have adjacent band interference on the IRB3, if the transmission power of the UE2 is much smaller than that of the UE1, or the UE2 is located close to that of the UE1, the signal sent by the UE1 to the UE3 will cause serious interference to the signal sent by the UE2 to the UE4, which is called near-far effect.

The application provides a resource selection method, which can be applied to a side link communication system shown in fig. 2, a terminal detects a Received Signal Strength Indicator (RSSI) on a first resource, then excludes resources in a first candidate resource set according to the RSSI of the first resource to obtain a second candidate resource set, and the terminal selects resources from the second candidate resource set to perform side link communication, so that the influence caused by adjacent band interference amplified by a near-far effect is favorably reduced.

Referring to fig. 3, fig. 3 is a flowchart illustrating a resource selection method according to an embodiment of the present application, where the resource selection method can be applied to the sidelink communication system shown in fig. 2. The embodiments of the present application take the above-mentioned terminal as an execution subject for detailed explanation. The resource selection method comprises the following steps:

s301, a Received Signal Strength Indication (RSSI) on the first resource is detected.

The first resource is an IRB, and is a resource in a first candidate resource set, and the resource in the first candidate resource set is used for side link communication.

In an alternative embodiment, the resources in the first candidate resource set are reserved resources, and the resources included in the initial set of the first candidate resource set may be configured by higher layer signaling or predefined by a protocol. For example, the resources in the initial set of the first set of candidate resources include IRB0, IRB1, IRB2, IRB3, IRB4 as shown in fig. 1.

In an alternative embodiment, the first resource is an unoccupied resource in the first candidate resource set. For example, IRB0, IRB1, IRB3, and IRB4 are in the first set of candidate resources in fig. 1, but IRB0 is an occupied resource, IRB1, IRB3, and IRB4 are not occupied, and therefore IRB1, IRB3, and IRB4 are first resources.

In an optional embodiment, the first resource is a resource adjacent to a second resource in a frequency domain, where the second resource is an IRB, and at least one of the following conditions is satisfied: occupied, reference Signal Receiving Power (RSRP) greater than a first threshold has been excluded from the first set of candidate resources. The first threshold is configured by higher layer signaling or the first threshold is pre-specified for the protocol. For example, IRB2 is the second resource in fig. 1, IRB0, IRB1, IRB3 and IRB4 are in the first candidate resource set, IRB1 and IRB3 are adjacent to the second resource in frequency domain, so IRB1 and IRB3 are the first resource. Because adjacent band interference exists between the IRBs, the transmission powers of different pschs may be different, and therefore, when the second resource is an occupied resource, a near-far effect may be caused when selecting a resource adjacent to the second resource for side link communication, and the adjacent band interference will be amplified. Therefore, the RSSI measurement needs to be performed on the adjacent resource of the second resource, so as to reduce the influence of the adjacent band interference amplified by the near-far effect. Meanwhile, only the adjacent resource of the second resource needs to be subjected to RSSI measurement, so that the power consumption can be saved.

In an alternative embodiment, the unit of the first threshold is dB or dBm.

In an alternative embodiment, the terminal receives and decodes Sidelink Control Information (SCI) within the sensing window, and knows which resources are used for psch transmission according to the Information content of the successfully decoded SCI. The terminal measures RSRP of a Demodulation Reference Signal (DMRS) on a PSCCH carrying an SCI or a DMRS on a PSCCH scheduled by the PSCCH. The terminal compares the measured RSRP with a first threshold, if the measured RSRP is higher than the first threshold, the corresponding resource is excluded from the first candidate resource set, otherwise the corresponding resource is left in the first candidate resource set. The corresponding resource excluded from the first candidate resource set is the second resource. At the same time, resources that the terminal does not perceive because of the half-duplex problem are also excluded from the first set of candidate resources. For example, the terminal receives and decodes the SCI within the sensing window, and the terminal determines that the PSCCH occupies IRB2 according to the information content of the SCI, that is, the terminal knows that IRB2 is used for sidelink communication according to the information content of the SCI, the terminal performs RSRP measurement on the DMRS on the PSCCH carrying the SCI, or the terminal performs RSRP measurement on the DMRS on the PSCCH scheduled by the PSCCH carrying the SCI. The terminal compares the measured RSRP with a first threshold, and if the measured RSRP is higher than the first threshold, excludes IRB2 from the first candidate resource set, where IRB2 is the second resource.

In an alternative embodiment, the detecting the Received Signal Strength Indication (RSSI) on the first resource may be detecting a linear average of Received power on one or more physical resource blocks within one symbol (symbol) on the first resource.

In an alternative embodiment, the RSSI on the first resource may be detected as a linear average of the received power on one or more IRBs within one symbol on the first resource.

In an alternative embodiment, the RSSI on the first resource may be detected as a linear average of the received power in a given bandwidth within one symbol on the first resource.

In an alternative embodiment, the RSSI on the first resource may be detected by detecting a linear average of received power in a given subchannel in a symbol on the first resource, wherein the subchannel includes one or more physical resource blocks.

In an alternative embodiment, the unit of RSSI is dB or dBm.

S302, removing the resources in the first candidate resource set according to the RSSI of the first resources to obtain a second candidate resource set.

And the resources in the second candidate resource set are the resources with less interference of the adjacent band, or the resources without interference of the adjacent band.

In an optional implementation manner, when the RSSI on the first resource is greater than the second threshold, the first resource is excluded from the first candidate resource set, and a second candidate resource set is obtained. Wherein the second threshold is configured by a higher layer signaling, or the second threshold is predefined by a protocol. For example, the first candidate resource set includes IRB0, IRB1, IRB3, and IRB4 as shown in fig. 1, the first resources are IRB0, IRB1, IRB3, and IRB4, and when RSSI over IRB0 is greater than a second threshold, the terminal excludes IRB0 from the first candidate resource set to obtain a second candidate resource set, that is, resources in the second candidate resource set include IRB1, IRB3, and IRB4. Therefore, the terminal screens the resources in the first candidate resource set through the RSSI, and can eliminate the unoccupied resources in the first candidate resource set, for example, the resources suffering from the serious adjacent band interference in the unoccupied resources are excluded from the first candidate resource set, so as to obtain the second candidate resource set.

In an alternative embodiment, if the second threshold is smaller, all resources in the first candidate resource set may be excluded, resulting in no available resources. Therefore, the third threshold may be configured by higher layer signaling, or may be predefined by a protocol, and the threshold is increased, for example, by 3dB, that is, the third threshold is 3dB higher than the second threshold. Therefore, if the RSSI of all the first resources is greater than the second threshold, the RSSI of all the first resources is compared with the third threshold, so that the resources suffering from serious adjacent band interference can be excluded, and the resources suffering from smaller adjacent band interference are left, so that the second candidate resource set has available resources and suffers less adjacent band interference. And if the RSSI on part of the first resources is greater than a third threshold value, excluding the first resources with the RSSI greater than the third threshold value from the first candidate resource set to obtain a second candidate resource set. In this way, if the RSSI on all the first resources is greater than the third threshold, it means that there is no available resource, so the fourth threshold can be configured through high-level signaling, or the fourth threshold is predefined by a protocol, the threshold is increased, for example, by 3dB, that is, the fourth threshold is 3dB higher than the third threshold, and then the RSSI on the first resources is compared with the fourth threshold. And if the RSSI on part of the first resources is greater than the fourth threshold value, excluding the first resources with the RSSI greater than the fourth threshold value from the first candidate resource set to obtain a second candidate resource set. That is, if the RSSI on all the first resources is greater than the nth-1 threshold, comparing the RSSI on all the first resources with the nth threshold, wherein the nth threshold is greater than the nth-1 threshold; and if the RSSI on part of the first resources is greater than the Nth threshold, excluding the first resources with the RSSI greater than the Nth threshold from the first candidate resource set to obtain a second candidate resource set. N is a positive integer larger than 4, and the Nth threshold is configured by high-layer signaling, or the Nth threshold is predetermined by a protocol. Meaning that if there is no available resource after the RSSI on the first resource is compared with the N-1 th threshold, the RSSI on the first resource may be further compared with an nth threshold higher than the N-1 th threshold until there is available resource in the resulting second candidate resource set.

S303, selecting resources from the second candidate resource set to perform side link communication.

In the first candidate resource set, the resource which is seriously interfered by the adjacent band is excluded, so that the resource in the second candidate resource set is less interfered by the adjacent band or is not interfered by the adjacent band, and the influence caused by the adjacent band interference amplified by the near-far effect is favorably reduced when the resource is selected from the second candidate resource set to carry out side-link communication.

For example, the resources in the initial set of the first candidate set of resources include IRB0, IRB1, IRB2, IRB3, IRB4 as shown in fig. 1. The terminal receives and decodes the SCI in the sensing window, the terminal determines that the PSSCH1 occupies the IRB0 and the IRB1 according to the information content of the SCI, and the PSSCH2 occupies the IRB2, namely, the terminal knows that the IRB0, the IRB1 and the IRB2 are used for side link communication according to the information content of the SCI. The terminal performs RSRP measurement on the DMRS on the PSCCH carrying the SCI, or the terminal performs RSRP measurement on the DMRS on the PSCCH scheduled by the PSCCH carrying the SCI. And the terminal compares the measured RSRP with a first threshold, the measured RSRP on IRB2 is higher than the first threshold, and the measured RSRP on IRB0 and IRB1 is lower than the first threshold. Therefore, the terminal excludes IRB2 from the first candidate resource set, and the first candidate resource set includes IRB0, IRB1, IRB3, and IRB4. IRB3, IRB4 in the first set of candidate resources are unoccupied resources, i.e. first resources. The terminal detects the RSSI on the first resource, that is, detects the RSSI on IRB3 and IRB4, the IRB3 and IRB2 are adjacent in frequency domain, the RSSI on IRB3 is higher than a second threshold, and the RSSI on IRB4 is lower than the second threshold, the terminal excludes IRB3 from the first candidate resource set to obtain a second candidate resource set, and at this time, the second candidate resource set includes IRB0, IRB1 and IRB4. The terminal selects resources from the second candidate resource set for the side link communication.

In the embodiment of the application, the terminal detects the RSSI on the first resource, and excludes the resource in the first candidate resource set according to the RSSI of the first resource to obtain a second candidate resource set; the terminal then selects resources from the second set of candidate resources for sidelink communications. Therefore, the terminal may reject the unoccupied resources through the RSSI, for example, the unoccupied resources that are seriously interfered by the adjacent bands in the first candidate resource set are excluded, so that the terminal does not select the resources that are seriously interfered by the adjacent bands for link communication. Compared with the method that only occupied resources can be eliminated through RSRP, the method is beneficial to reducing the influence caused by adjacent band interference amplified by the near-far effect.

Referring to fig. 4, fig. 4 is a schematic structural diagram of a resource selection device according to an embodiment of the present disclosure. The resource selection apparatus 400 includes: a detection unit 401, an exclusion unit 402 and a selection unit 403.

A detecting unit 401, configured to detect a received signal strength indication RSSI on a first resource, where the first resource is a resource in a first candidate resource set, and the resource in the first candidate resource set is used for sidelink communication.

An excluding unit 402, which excludes the resource in the first candidate resource set according to the RSSI of the first resource, to obtain a second candidate resource set.

A selecting unit 403, configured to select a resource from the second candidate resource set for side link communication.

In an optional implementation manner, the resource selection apparatus further includes a comparing unit 404, if the RSSI on all the first resources is greater than the second threshold, the comparing unit 404 is configured to compare the RSSI on all the first resources with a third threshold, where the third threshold is greater than the second threshold; if the RSSI on the part of the first resources is greater than the third threshold, the excluding unit 402 is further configured to exclude the first resources whose RSSI is greater than the third threshold from the first candidate resource set; if the RSSI of all the first resources is greater than the third threshold, the comparing unit 404 is further configured to compare the RSSI of all the first resources with a fourth threshold, where the fourth threshold is greater than the third threshold; if the RSSI on the part of the first resources is greater than the fourth threshold, the excluding unit 402 is further configured to exclude the first resources whose RSSI is greater than the fourth threshold from the first candidate resource set.

In an optional implementation manner, the detecting unit 401 is further configured to detect a linear average of received power on one or more physical resource blocks in one symbol on the first resource; or, the first resource is further configured to detect a linear average of received power at one or more IRBs within one symbol on the first resource; or, the method is further configured to detect a linear average of received power within a given bandwidth within one symbol on the first resource; or, the method is further configured to detect a linear average of received power in a given subchannel in one symbol on the first resource, where the subchannel includes one or more physical resource blocks.

The relevant content of this embodiment can be referred to the relevant content of the above method embodiment. And will not be described in detail herein.

In the embodiment of the application, the terminal detects the RSSI on the first resource, and excludes the resource in the first candidate resource set according to the RSSI of the first resource to obtain a second candidate resource set; the terminal then selects resources from the second set of candidate resources for sidelink communications. Therefore, the terminal may reject unoccupied resources through the RSSI, for example, the unoccupied resources suffering from the severe adjacent band interference in the first candidate resource set are excluded, so that the terminal does not select these resources suffering from the severe adjacent band interference for link communication. Compared with the method that only occupied resources can be eliminated through RSRP, the method is beneficial to reducing the influence caused by the adjacent band interference amplified by the near-far effect.

Referring to fig. 5, fig. 5 is a schematic structural diagram of a terminal according to an embodiment of the present disclosure. The terminal 500 includes: the processor 501, the memory 502, the processor 501 and the memory 502 are connected by one or more communication buses.

The Processor 501 may be a Central Processing Unit (CPU), and may also be other general purpose processors, digital Signal Processors (DSP), application Specific Integrated Circuits (ASIC), field-Programmable Gate arrays (FPGA) or other Programmable logic devices, discrete Gate or transistor logic devices, discrete hardware components, and so on. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.

The memory may be either volatile memory or nonvolatile memory, or may include both volatile and nonvolatile memory. The non-volatile Memory may be a Read-Only Memory (ROM), a Programmable ROM (PROM), an Erasable PROM (EPROM), an Electrically Erasable PROM (EEPROM), or a flash Memory. Volatile Memory can be Random Access Memory (RAM), which acts as external cache Memory. By way of example, but not limitation, many forms of Random Access Memory (RAM) are available, such as Static RAM (Static SRAM), dynamic Random Access Memory (DRAM), synchronous Dynamic Random Access Memory (SDRAM), SDRAM (Synchronous DRAM), DDR SDRAM (Double Data Rate SDRAM, DDR SDRAM), enhanced SDRAM (Enhanced SDRAM, ESDRAM), SDRAM (Synchronous DRAM), SLDRAM (Synchlink DRAM), and dma (Direct RAM, DR RAM).

The processor 501 is configured to perform the corresponding functions of the terminal in the method described in fig. 3. The memory 502 may include read-only memory and random access memory, and provides computer programs and data to the processor 501. A portion of the memory 502 may also include non-volatile random access memory. When the processor 501 calls the computer program, it is configured to:

detecting a Received Signal Strength Indicator (RSSI) on a first resource, wherein the first resource is a resource in a first candidate resource set, and the resource in the first candidate resource set is used for side link communication;

removing the resources in the first candidate resource set according to the RSSI of the first resource to obtain a second candidate resource set;

In an alternative embodiment, when the RSSI on the first resource is greater than the second threshold, the first resource is excluded from the first candidate resource set, resulting in a second candidate resource set.

In an optional embodiment, if the RSSI of all the first resources is greater than the second threshold, comparing the RSSI of all the first resources with a third threshold, where the third threshold is greater than the second threshold; if the RSSI on part of the first resources is greater than a third threshold value, excluding the first resources with the RSSI greater than the third threshold value from the first candidate resource set; if the RSSI on all the first resources is larger than a third threshold value, comparing the RSSI on all the first resources with a fourth threshold value, wherein the fourth threshold value is larger than the third threshold value; and if the RSSI on the part of the first resources is greater than the fourth threshold value, excluding the first resources with the RSSI greater than the fourth threshold value from the first candidate resource set.

In an alternative embodiment, a linear average of received power on one or more physical resource blocks within one symbol on a first resource is detected; or, detecting a linear average of received power at one or more IRBs within one symbol on the first resource; or, detecting a linear average value of the received power in a given bandwidth in a symbol on the first resource; or, detecting a linear average of received power in a given subchannel within one symbol on the first resource, wherein the subchannel includes one or more physical resource blocks.

The embodiment of the application provides a chip. The chip includes: a processor and a memory. The number of processors may be one or more, and the number of memories may be one or more. The processor may perform the resource selection method described above with reference to fig. 3, and the steps performed by the related embodiments, by reading instructions and data stored in the memory.

An embodiment of the present application further provides a chip module, where the chip module includes the above chip, and can execute the resource selection method shown in fig. 3 and the steps executed by the related embodiments.

The embodiment of the application also provides a computer readable storage medium. The computer readable storage medium stores a computer program, which includes program instructions, and when the program instructions are executed by a processor, the method for selecting resources as shown in fig. 3 and the steps executed by the related embodiments can be performed.

The computer readable storage medium may be an internal storage unit of the terminal according to any of the foregoing embodiments, for example, a hard disk or a memory of the device. The computer readable storage medium may also be an external storage device of the terminal, such as a plug-in hard disk, a Smart Media Card (SMC), a Secure Digital (SD) Card, a Flash memory Card (Flash Card), and the like provided on the device. Further, the computer-readable storage medium may also include both an internal storage unit and an external storage device of the terminal. The computer-readable storage medium is used for storing the computer program and other programs and data required by the terminal. The computer readable storage medium may also be used to temporarily store data that has been output or is to be output. The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device such as a server, data center, etc. that contains one or more collections of available media. The usable medium may be a magnetic medium (e.g., floppy disk, hard disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium. The semiconductor medium may be a solid state disk.

The above embodiments may be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented in software, the above-described embodiments may be implemented in whole or in part in the form of a computer program product. The computer program product comprises one or more computer instructions or computer programs. The procedures or functions according to the embodiments of the present application are wholly or partially generated when the computer instructions or the computer program are loaded or executed on a computer. The computer may be a general purpose computer, a special purpose computer, a network of computers, or other programmable device. The computer instructions may be stored in a computer readable storage medium or transmitted from one computer readable storage medium to another computer readable storage medium, for example, the computer instructions may be transmitted from one website, computer, server, or data center to another website, computer, server, or data center by wire or wirelessly.

It should be understood that, in the various embodiments of the present application, the sequence numbers of the above-mentioned processes do not imply any order of execution, and the order of execution of the processes should be determined by their functions and inherent logic, and should not constitute any limitation to the implementation process of the embodiments of the present application.

In the several embodiments provided in the present application, it should be understood that the disclosed method, apparatus, and system may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative; for example, the division of the cell is only a logic function division, and there may be another division manner in actual implementation; for example, various elements or components may be combined or may be integrated into another system, or some features may be omitted, or not implemented. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may be separately and physically included, or two or more units may be integrated into one unit. The integrated unit can be realized in a form of hardware, or in a form of hardware plus a software functional unit.

The integrated unit implemented in the form of a software functional unit may be stored in a computer readable storage medium. The software functional unit is stored in a storage medium and includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute some steps of the methods described in the embodiments of the present invention.

It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by a computer program, which can be stored in a computer-readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. The storage medium may be a magnetic disk, an optical disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), or the like.

While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. A method for resource selection, the method comprising:

2. The method of claim 1, wherein the first resource is an unoccupied resource in the first candidate resource set.

3. The method of claim 1, wherein the first resource is a resource adjacent to a second resource in a frequency domain, and wherein the second resource satisfies at least one of the following conditions: occupied, reference signal received power, RSRP, greater than a first threshold, has been excluded from the first set of candidate resources.

4. The method of claim 3, wherein the first resource and the second resource are comb resource blocks (IRBs).

5. The method according to any of claims 1-4, wherein said excluding the resources in the first set of candidate resources according to the RSSI of the first resource to obtain a second set of candidate resources comprises:

and when the RSSI on the first resource is greater than a second threshold value, excluding the first resource from the first candidate resource set to obtain a second candidate resource set.

6. The method according to any of claims 1-4, wherein said excluding the resources in the first set of candidate resources according to the RSSI of the first resource to obtain a second set of candidate resources comprises:

if the RSSI on all the first resources is larger than a second threshold value, comparing the RSSI on all the first resources with a third threshold value, wherein the third threshold value is larger than the second threshold value;

if the RSSI on part of the first resources is greater than the third threshold, excluding the first resources with RSSI greater than the third threshold from the first candidate resource set;

if the RSSI of all the first resources is greater than the third threshold, comparing the RSSI of all the first resources with a fourth threshold, wherein the fourth threshold is greater than the third threshold;

and if the RSSI on the part of the first resources is greater than the fourth threshold value, excluding the first resources with the RSSI greater than the fourth threshold value from the first candidate resource set.

7. The method of claim 3, wherein the first threshold is configured by higher layer signaling or is predefined by a protocol.

8. The method of claim 6, wherein the second threshold, the third threshold, and the fourth threshold are configured by higher layer signaling, or wherein the second threshold, the third threshold, and the fourth threshold are predefined by a protocol.

9. The method according to any one of claims 1 to 8, wherein the detecting the RSSI on the first resource comprises:

detecting a linear average of received power on one or more physical resource blocks within one symbol on the first resource; or the like, or, alternatively,

detecting a linear average of received power at one or more IRBs within one symbol on the first resource; or the like, or, alternatively,

detecting a linear average of received power within a given bandwidth within one symbol on the first resource; or the like, or, alternatively,

detecting a linear average of received power in a given subchannel comprising one or more physical resource blocks in one symbol on said first resource.

10. A resource selection apparatus, characterized in that the resource selection apparatus comprises:

a detecting unit, configured to detect a received signal strength indication RSSI on a first resource, where the first resource is a resource in a first candidate resource set, and the resource in the first candidate resource set is used for sidelink communication;

an excluding unit, configured to exclude resources in the first candidate resource set according to the RSSI of the first resource, so as to obtain a second candidate resource set;

11. A chip, characterized in that it comprises a processor and a data interface, the processor reading instructions stored on a memory through the data interface to perform the method according to any one of claims 1 to 9.

12. A chip module, characterized in that it comprises a chip as claimed in claim 11.

13. A computer-readable storage medium, characterized in that the computer-readable storage medium stores a computer program comprising program instructions that, when executed by a processor, cause the processor to carry out the method according to any one of claims 1 to 9.