CN112640499A

CN112640499A - Resource selection method, resource selection device, and storage medium

Info

Publication number: CN112640499A
Application number: CN202080004070.8A
Authority: CN
Inventors: 赵文素
Original assignee: Beijing Xiaomi Mobile Software Co Ltd
Current assignee: Beijing Xiaomi Mobile Software Co Ltd
Priority date: 2020-12-14
Filing date: 2020-12-14
Publication date: 2021-04-09
Also published as: WO2022126338A1

Abstract

The present disclosure relates to a resource selection method, a resource selection apparatus, and a storage medium. The resource selection method is applied to the first user equipment, and the first user equipment sends the auxiliary resource set to the second user equipment in response to the fact that the resource of the second user equipment for data transmission meets the resource conflict condition, so that the first equipment can send the auxiliary resource set based on the resource conflict condition.

Description

Resource selection method, resource selection device, and storage medium

Technical Field

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

Background

Since Long Term Evolution (LTE), the Third Generation Partnership project (3 GPP) has established a direct link (Sidelink) standard as a standard for terminal-to-terminal direct communication. The first standard of New Radio (NR) Sidelink, mainly for vehicle to all (V2X) and public safety, was completed in Rel-16 in 7 2020. For V2X and public safety, Release16 does not fully support Service requirements and operating schemes due to time constraints, and services and Systems (SA) make some enhancements at Release17 NR Sidelink, such as architectural and System enhancements for 3GPP supporting advanced V2X services. In addition, in the SA working group, other business cases related to NR sildelink, such as network-controlled interactive services, enhanced energy efficiency relays, wide coverage, production of audiovisual services, are being studied. Therefore, in the 86 th meeting of 3GPP, the enhancement of NR Sidelink is taken as a work item in the project of Release17, aiming at enhancing the reliability of Sidelink transmission and reducing the time delay.

In the NR Sidelink enhancement, a user equipment a in direct communication may send a secondary resource set to a user equipment B in the Mode2, and the user equipment B may consider resource selection for its own data transmission. However, there is no implementation in the related art when the user equipment a is triggered to transmit the secondary resource set to the user equipment B.

Disclosure of Invention

To overcome the problems in the related art, the present disclosure provides a resource selection method, a resource selection apparatus, and a storage medium.

According to a first aspect of the embodiments of the present disclosure, there is provided a resource selection method applied to a first user equipment, the resource selection method including: in response to determining that resources for data transmission by a second user equipment satisfy a resource conflict condition, transmitting an auxiliary resource set to the second user equipment.

In one embodiment, the resource conflict condition includes: the resource conflict occurs already in the resource of the second user equipment for data transmission.

In one embodiment, the resource conflict already occurs in the resource for data transmission by the second user equipment, including:

and the received signal strength indicated value of the sub-channel for data transmission of the second user equipment is greater than the received signal strength threshold value.

In one embodiment, the resource conflict condition includes: resource conflict of the resources of the second user equipment for data transmission is about to occur.

In one embodiment, the resource collision of the resource for data transmission by the second user equipment is about to occur, including:

and partially or completely overlapped resources exist between the first reserved resources indicated by the direct connection link control information of the second user equipment and the second reserved resources indicated by the direct connection link control information of the third user equipment.

In one embodiment, the resource selection method further includes: sending a conflict indication to the second user equipment, wherein the conflict indication is used for indicating the resource conflict condition.

In one embodiment, at least one of a set of auxiliary resources and a collision indication is sent to the second user equipment based on first-stage direct link control information or second-stage direct link control information.

According to a second aspect of the embodiments of the present disclosure, there is provided a resource selection method applied to a second user equipment, the resource selection method including: receiving an auxiliary resource set sent by a first user equipment, wherein the auxiliary resource set is sent by the first user equipment when the first user equipment determines that resources for data transmission of a second user equipment meet a resource conflict condition.

and a resource which is overlapped exists between a first reserved resource indicated by the direct connection link control information of the second user equipment and a second reserved resource indicated by the direct connection link control information of the third user equipment.

In one embodiment, the resource selection method further includes: and receiving a conflict indication sent by the first user equipment, wherein the conflict indication is used for indicating the resource conflict condition.

In one embodiment, the resource selection method further includes: and in response to receiving the conflict indication sent by the first user equipment, retransmitting the data correspondingly transmitted by the resource with the resource conflict.

In one embodiment, the resource selection method further includes: and retransmitting data correspondingly transmitted by the resource with resource conflict in response to receiving the conflict indication sent by the first user equipment and the received HARQ correct response feedback confirmation.

In one embodiment, the resource selection method further includes: and in response to receiving the conflict indication sent by the first user equipment, reselecting resources for data transmission based on the auxiliary resource set.

In one embodiment, at least one of an auxiliary resource set and a collision indication sent by the first user equipment is received based on first-stage direct link control information or second-stage direct link control information.

According to a third aspect of the embodiments of the present disclosure, there is provided a resource selection apparatus applied to a first user equipment, the resource selection apparatus including:

a sending unit configured to send an auxiliary resource set to a second user equipment in response to determining that a resource for data transmission by the second user equipment satisfies a resource conflict condition.

In one embodiment, the resource conflict condition includes:

the resource conflict occurs already in the resource of the second user equipment for data transmission.

In one embodiment, the transmitting unit is further configured to: sending a conflict indication to the second user equipment, wherein the conflict indication is used for indicating the resource conflict condition.

In an embodiment, the sending unit sends at least one of an auxiliary resource set and a collision indication to the second user equipment based on first-stage direct link control information or second-stage direct link control information.

According to a fourth aspect of the embodiments of the present disclosure, there is provided a resource selection apparatus, which is applied to a second user equipment, the resource selection apparatus including:

a receiving unit, configured to receive an auxiliary resource set sent by a first user equipment, where the auxiliary resource set is sent by the first user equipment when the first user equipment determines that a resource for data transmission by a second user equipment meets a resource conflict condition.

In one embodiment, the receiving unit is further configured to:

and receiving a conflict indication sent by the first user equipment, wherein the conflict indication is used for indicating the resource conflict condition.

In one embodiment, the resource selection apparatus further includes a transmitting unit configured to:

and in response to the receiving unit receiving the conflict indication sent by the first user equipment, retransmitting the data correspondingly transmitted by the resource with the resource conflict.

and in response to the receiving unit receiving the conflict indication sent by the first user equipment and the received HARQ feedback confirmation, retransmitting the data correspondingly transmitted by the resource where the resource conflict occurs.

and in response to the receiving unit receiving the conflict indication sent by the first user equipment, reselecting resources for data transmission based on the auxiliary resource set.

In an embodiment, the receiving unit receives at least one of an auxiliary resource set and a collision indication sent by the first user equipment based on first-stage direct link control information or second-stage direct link control information.

According to a fifth aspect of the embodiments of the present disclosure, there is provided a resource selection apparatus, including:

a processor; a memory for storing processor-executable instructions;

wherein the processor is configured to: the method for selecting resources as described in the first aspect or any one of the embodiments of the first aspect is performed.

According to a sixth aspect of the embodiments of the present disclosure, there is provided a resource selection apparatus, including:

a processor; a memory for storing processor-executable instructions;

wherein the processor is configured to: the method for selecting resources as described in the second aspect or any one of the embodiments of the second aspect is performed.

According to a seventh aspect of embodiments of the present disclosure, there is provided a non-transitory computer-readable storage medium, wherein instructions, when executed by a processor of a mobile terminal, enable the mobile terminal to perform the method for selecting resources described in the first aspect or any one of the embodiments of the first aspect.

According to an eighth aspect of the embodiments of the present disclosure, there is provided a non-transitory computer-readable storage medium, wherein instructions of the storage medium, when executed by a processor of a mobile terminal, enable the mobile terminal to perform the resource selection method described in the second aspect or any one of the embodiments of the second aspect.

The technical scheme provided by the embodiment of the disclosure can have the following beneficial effects: the first device sends the auxiliary resource set to the second user equipment in response to the determination that the resource for data transmission by the second user equipment meets the resource conflict condition, so that the first device can send the auxiliary resource set based on the resource conflict condition.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and together with the description, serve to explain the principles of the disclosure.

Fig. 1 is an illustration of a direct communication system, according to an example embodiment.

FIG. 2 is a flow diagram illustrating a method of resource selection in accordance with an exemplary embodiment.

FIG. 3 is a flow diagram illustrating a method for resource selection in accordance with an exemplary embodiment

FIG. 4 is a flow diagram illustrating a method of resource selection in accordance with an exemplary embodiment.

FIG. 5 is a flow diagram illustrating a method for resource selection in accordance with an exemplary embodiment.

FIG. 6 is a flow diagram illustrating a method for resource selection in accordance with an exemplary embodiment

FIG. 7 is a flow diagram illustrating a method for resource selection in accordance with an exemplary embodiment.

FIG. 8 is a flowchart illustrating a resource selection method in accordance with an exemplary embodiment

FIG. 9 is a flow diagram illustrating a method for resource selection in accordance with an exemplary embodiment.

FIG. 10 is a flow diagram illustrating a method for resource selection in accordance with an exemplary embodiment.

FIG. 11 is a flowchart illustrating a method for resource selection in accordance with an exemplary embodiment

FIG. 12 is a flow diagram illustrating a method for resource selection in accordance with an exemplary embodiment.

FIG. 13 is a diagram illustrating that a conflict has occurred in accordance with an example embodiment.

Fig. 14 is a diagram illustrating a collision in the future caused by a coincidence (partial or full coincidence) of reserved resources according to an example embodiment.

FIG. 15 is a block diagram illustrating a resource selection apparatus according to an example embodiment.

FIG. 16 is a block diagram illustrating a resource selection apparatus according to an example embodiment.

FIG. 17 is a block diagram illustrating an apparatus for resource selection in accordance with an example embodiment.

Detailed Description

Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the exemplary embodiments below are not intended to represent all implementations consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present disclosure, as detailed in the appended claims.

The resource selection method provided by the embodiment of the disclosure can be applied to the direct connection communication system shown in fig. 1. Referring to fig. 1, in a scenario of performing direct connection communication between direct connection communication devices, a network device configures various transmission parameters for data transmission for the direct connection communication device 1. The direct connection communication device 1, the direct connection communication device 2 and the direct connection communication device 3 perform direct connection communication. There may be an obstacle between the direct communication device 2 and the direct communication device 3. The link for performing communication between the network device and the direct connection communication device is an uplink and downlink link, and the link between the direct connection communication device and the direct connection communication device is a direct connection link (sidelink).

In the present disclosure, a communication scenario for direct communication between direct connection communication devices may be a Vehicle to event (V2X) service scenario. Wherein V represents an in-vehicle device and X represents any object interacting with the in-vehicle device. Currently X mainly contains on-board equipment, handheld devices, traffic side infrastructure and networks. The information mode of V2X interaction includes: interaction between the Vehicle-mounted device and the Vehicle-mounted device (V2V), between the Vehicle-mounted device and the roadside device (V2I), between the Vehicle-mounted device and the handheld device (V2P), and between the Vehicle-mounted device and the Network (V2N).

With the development of a new generation of 5G mobile communication technology, support for new V2x communication services and scenarios, such as fleet management (Vehicles platform), Extended sensing (Extended Sensors), Advanced Driving (Advanced Driving), and remote Driving (remote Driving), is implemented in 3GPP Rel-16 by using 5G NR technology. In general, 5G V2x sidelink can provide higher communication speed, shorter communication delay and more reliable communication quality.

The communication scenario for direct communication between direct communication devices may also be a terminal to terminal (D2D) communication scenario. The direct communication device performing direct communication in the embodiments of the present disclosure may include various handheld devices, vehicle-mounted devices, wearable devices, computing devices or other processing devices connected to a wireless modem, which have wireless communication functions, and various forms of User Equipment (UE), Mobile Stations (MS), terminals (Terminal), Terminal devices (Terminal Equipment), and the like. For convenience of description, the following embodiments of the present disclosure take a direct connection communication device as a user equipment as an example for explanation.

Among other things, the enhancement of NR Sidelink can improve transmission reliability and reduce latency. In the NR Sidelink enhancement, in terms of enhancing Mode2 resource allocation, 3GPP working group reaches the conclusion, and needs to research a way for assisting resource selection among ues. In this way, two ues are defined, for example, ue a is an auxiliary ue of ue B, and ue B is a ue that needs to perform resource selection for data transmitted by itself. The user equipment a determines a resource set and sends the resource set to the user equipment B in a mode of mode2, and the user equipment B considers the resource set sent by the user equipment a when selecting resources, that is, the user equipment B uses an auxiliary resource set assisting mechanism to select resources. Wherein user device B may send data to user device a and/or other user devices.

However, in the related art communication method for resource selection for the auxiliary resource set assisting mechanism, the transmission timing for the auxiliary resource set is not determined yet, i.e. when to trigger the ue a to transmit the auxiliary resource set to the ue B is not solved yet. After discussing that the predefined condition needs to be considered to be met in the 102e conference, the user equipment a sends the auxiliary resource set to the user equipment B, but the predefined condition is not explained.

The disclosed embodiment provides a resource selection method, wherein when a user equipment providing an auxiliary resource set detects that a resource for data transmission by the user equipment using an auxiliary resource set assisting mechanism to perform resource selection meets a resource conflict (collision) condition, the user equipment providing the auxiliary resource set sends the auxiliary resource set to the user equipment using the auxiliary resource set assisting mechanism to perform resource selection.

For convenience of description in the embodiments of the present disclosure, a user equipment providing an auxiliary resource is referred to as a first user equipment, and a user equipment performing resource selection using an auxiliary resource set assisting mechanism is referred to as a second user equipment.

Fig. 2 is a flowchart illustrating a resource selection method according to an exemplary embodiment, where the resource selection method is used in a first user equipment as shown in fig. 2, and includes the following steps.

In step S11, in response to determining that the resource for data transmission by the second user equipment satisfies the resource conflict condition, an auxiliary resource set is sent to the second user equipment.

In the embodiment of the present disclosure, the resource for the second user equipment to perform data transmission may be understood as a resource selected by the second user equipment for sending and/or receiving data by itself.

The resource conflict of the data transmission by the second user equipment may be understood as resource conflict of the data transmission by the second user equipment with a resource of data transmission by other user equipment (hereinafter referred to as a third user equipment) of the non-second user equipment.

The occurrence of resource conflicts in the embodiments of the present disclosure may be understood as both time domain resource conflicts and frequency domain resource conflicts.

The embodiment of the present disclosure may pre-define a resource conflict condition, and trigger the first user equipment to send the auxiliary resource set to the second user equipment when it is determined that the resource for the second user equipment to perform data transmission satisfies the pre-defined resource conflict condition.

In an implementation manner of the resource selection method provided in the embodiment of the present disclosure, the resource conflict condition includes: the resource conflict occurs already in the resource of the second user equipment for data transmission.

Fig. 3 is a flowchart illustrating a resource selection method according to an exemplary embodiment, where the resource selection method is used in a first user equipment as shown in fig. 3, and includes the following steps.

In step S21, in response to determining that a resource conflict has occurred for resources for data transmission by the second user equipment, an auxiliary resource set is sent to the second user equipment.

In the embodiment of the present disclosure, if it is detected that a resource conflict has occurred in a resource for data transmission by a second user equipment, a first user equipment may determine that a resource conflict condition is satisfied, and trigger sending of an auxiliary resource set to the second user equipment.

Further, when resource collision has occurred on a resource, it can be understood that the collision occurs on a time domain resource and a frequency domain resource. For example, there are multiple user equipments transmitting data simultaneously on the same sub-channel (sub-channnel), or it can also be understood that there are multiple received signals. In the embodiment of the present disclosure, when there are multiple Received signals in the same sub-channel, the Received signals are mutually interference signals, and a Received Signal Strength Indicator (RSSI) value is relatively high, so that the resource collision may be detected by detecting the RSSI on the sub-channel. The RSSI value is compared with the RSSI threshold value by measuring the RSSI value on each sub-channnel, and if the RSSI value is greater than the RSSI threshold value, the fact that resource collision has occurred on the sub-channnel can be determined.

In an example, in this embodiment of the present disclosure, in response to that the RSSI value of the sub-channel for data transmission by the second user equipment is greater than the RSSI threshold, it may be determined that resource collision has occurred on resources for data transmission by the second user equipment.

Fig. 4 is a flowchart illustrating a resource selection method according to an exemplary embodiment, where the resource selection method is used in a first user equipment as shown in fig. 4, and includes the following steps.

In step S31, in response to the RSSI value of the sub-channel for data transmission by the second user equipment being greater than the RSSI threshold, the first user equipment sends the set of auxiliary resources to the second user equipment.

In an implementation manner of the resource selection method provided in the embodiment of the present disclosure, the resource conflict condition includes: resource conflict of the resources of the second user equipment for data transmission is about to occur.

In the embodiment of the present disclosure, the resource collision that is about to occur in the resource for data transmission by the second user equipment may be understood as resource coincidence between a reserved resource for data transmission by the second user equipment and a reserved resource for data transmission by the third user equipment. The occurrence of resource coincidence may be partial resource coincidence or complete resource coincidence.

Fig. 5 is a flowchart illustrating a resource selection method according to an exemplary embodiment, where the resource selection method is used in a first user equipment as shown in fig. 5, and includes the following steps.

In step S41, in response to determining that a resource conflict is about to occur for resources for data transmission by the second user equipment, an auxiliary resource set is sent to the second user equipment.

In this embodiment of the present disclosure, the first ue may obtain direct link Control Information (SCI) of other ues different from the first ue. In an example, the first user equipment may detect that SCIs of different user equipments reserve mutually coinciding time and frequency resources. When the first user equipment receives SCIs of at least two other different user equipments, it detects that a certain coincidence exists between the reserved time-frequency resources of the two different user equipments by decoding a reservation time/frequency resource information field in the first-stage SCI, that is, a sub-channel and a slot where the resources are located are coincident. In the embodiment of the present disclosure, the first device determines, by decoding SCI information of the second user equipment and SCI information of the third user equipment, that a resource conflict may occur between a resource for data transmission by the second user equipment and a reserved resource for data transmission by other user equipment that is not the second user equipment. That is, if there is a partially overlapped resource or a completely overlapped resource between the first reserved resource indicated by the SCI of the second user equipment and the second reserved resource indicated by the SCI of the third user equipment, it may be determined that a resource collision may occur in the resource for data transmission by the second user equipment.

Fig. 6 is a flowchart illustrating a resource selection method according to an exemplary embodiment, where the resource selection method is used in a first user equipment as shown in fig. 6, and includes the following steps.

In step S51, in response to there being partially or completely overlapping resources between the first reserved resource indicated by the SCI of the second user equipment and the second reserved resource indicated by the SCI of the third user equipment, the first user equipment sends the set of auxiliary resources to the second user equipment.

In the resource selection method provided in each of the embodiments of the present disclosure, the first device triggers sending of the auxiliary resource set to the second user equipment by detecting that a resource for data transmission by the second user equipment satisfies a resource conflict condition, so as to determine a condition for sending the auxiliary resource set to the second user equipment by the first user equipment.

In the resource selection method provided in each of the embodiments of the present disclosure, the auxiliary resource set sent by the first device to the second user equipment may be carried in first-stage direct link Control Information (first SCI) or second-stage direct link Control Information (second SCI). In other words, the first device transmits the secondary resource set based on the first SCI or the second SCI.

The resource selection method provided by the embodiment of the present disclosure may send a conflict indication to the second user equipment in response to the first user equipment determining that the resource for the data transmission by the second user equipment satisfies the resource conflict condition. The conflict indication may be used to indicate the above-mentioned resource conflict condition, and may also be understood as a location of a time domain resource and a frequency domain resource where a resource conflict has occurred, or a location of a time domain resource and a frequency domain resource where a resource conflict is about to occur.

In the resource selection method provided by the embodiment of the present disclosure, in response to the first user equipment determining that the resource for data transmission by the second user equipment satisfies the resource conflict condition, an auxiliary resource set and a conflict indication may be sent to the second user equipment.

Fig. 7 is a flowchart illustrating a resource selection method according to an exemplary embodiment, where the resource selection method is used in a first user equipment, as shown in fig. 7, and includes the following steps.

In step S61, in response to the first user equipment determining that the resources for data transmission by the second user equipment satisfy the resource conflict condition, the first user equipment sends an auxiliary resource set and a conflict indication to the second user equipment.

In an embodiment, that the resource for the data transmission by the second user equipment satisfies the resource conflict condition may be that the resource for the data transmission by the second user equipment has already collided.

In one embodiment, the resource conflict occurs to the resource of the second user equipment for data transmission, and includes: and the received signal strength indicated value of the sub-channel for data transmission of the second user equipment is greater than the received signal strength threshold value.

In one embodiment, that the resource for the data transmission by the second user equipment satisfies the resource conflict condition may be that the resource conflict of the resource for the data transmission by the second user equipment is about to occur.

In one embodiment, the resource collision that is about to occur in the resource for data transmission by the second user equipment may be understood as a resource that is partially overlapped or completely overlapped between a first reserved resource indicated by the direct link control information of the second user equipment and a second reserved resource indicated by the direct link control information of the third user equipment.

Wherein the first user equipment may send the secondary resource set and the collision indication to the second user equipment based on the first SCI or the second SCI.

Further, in this embodiment of the present disclosure, the first user equipment may obtain the source IDs of the second user equipments, which reserve the overlapping resources, respectively by decoding the second SCI, and at this time, the first user equipment sends at least one of the auxiliary resource set and the collision indication to the second user equipment according to the corresponding source ID.

In the embodiment of the present disclosure, a first user equipment is triggered to send an auxiliary resource set to a second user equipment, and the second user equipment may receive the auxiliary resource set sent by the first user equipment and use an auxiliary resource set assisting mechanism to perform resource selection.

Fig. 8 is a flowchart illustrating a resource selection method according to an exemplary embodiment, where the resource selection method is used in a second user equipment as shown in fig. 8, and includes the following steps.

In step S71, an auxiliary resource set sent by the first user equipment is received, where the auxiliary resource set is sent by the first user equipment when the first user equipment determines that resources for data transmission by the second user equipment satisfy a resource conflict condition.

The second user equipment may receive the auxiliary resource set sent by the first user equipment based on the first SCI or the second SCI.

Further, in this embodiment of the present disclosure, the second user equipment may receive a collision indication sent by the first user equipment, where the collision indication may be sent by the first user equipment when it is determined that the resource for data transmission by the second user equipment satisfies the resource collision condition.

Fig. 9 is a flowchart illustrating a resource selection method according to an exemplary embodiment, where the resource selection method is used in a second user equipment as shown in fig. 9, and includes the following steps.

In step S81, an auxiliary resource set and a collision indication sent by the first user equipment are received, where the auxiliary resource set and the collision indication are sent by the first user equipment when the first user equipment determines that the resource for data transmission by the second user equipment satisfies the resource collision condition.

In the embodiment of the present disclosure, the conflict indication may be used to indicate the above-mentioned resource conflict condition, and may also be understood as a location of a time domain resource and a frequency domain resource that are used to indicate that a resource conflict has occurred, or a location of a time domain resource and a frequency domain resource that are used to indicate that a resource conflict is about to occur.

In the foregoing embodiments of the present disclosure, the second user equipment may receive at least one of the set of auxiliary resources and the collision indication sent by the first user equipment based on the first SCI or the second SCI.

Furthermore, in the embodiment of the present disclosure, the second user equipment receives the conflict indication, and performs a corresponding response operation based on the content indicated by the conflict indication.

In one embodiment, if the collision indication indicates that the resource used for the second user equipment for data transmission has collided, the second device may determine that the data needs to be retransmitted.

When the second user equipment retransmits the data, the data retransmission resource can be selected based on the auxiliary resource set and the perceived resource, that is, the first user equipment assists the second user equipment to retransmit the data. The auxiliary resource set includes a resource set recommended to be used by the second user equipment and a resource set not recommended to be used by the second user equipment, and the resource selection is performed based on the auxiliary resource set to retransmit data, so that reliability (reliability) can be improved.

In this embodiment of the present disclosure, in a case that the first user equipment assists the second user equipment in performing data retransmission (retransmission), in an implementation, the second user equipment may be directly triggered when the first user equipment detects that a resource conflict occurs, and the second user equipment does not consider whether a Hybrid Automatic Repeat reQuest (HARQ) feedback is received. In other words, the second user equipment starts data retransmission when receiving the collision indication sent by the first user equipment to the second user equipment.

Fig. 10 is a flowchart illustrating a resource selection method according to an exemplary embodiment, where the resource selection method is used in a second user equipment as shown in fig. 10, and includes the following steps.

In step S91, in response to receiving the collision indication sent by the first user equipment, the second user equipment retransmits the data correspondingly transmitted by the resource where the resource collision has occurred.

In this embodiment of the present disclosure, in a case that the first user equipment assists the second user equipment in performing data retransmission (retransmission), in another implementation, whether the second user equipment performs data retransmission may be triggered by considering both resource collision detected by the first user equipment and HARQ feedback of the second user equipment.

The HARQ feedback is for a broadcast scenario, and does not support correct Acknowledgement (ACK) feedback, but only supports error acknowledgement (NACK) feedback. For NACK feedback, data retransmission is required. In the scenario of HARQ feedback for unicast and multicast HARQ options 2, the unicast HARQ feedback specified by R16 supports NACK/ACK, and the multicast option2 supports NACK/ACK (the multicast HARQ feedback for options only feeds back NACK). Therefore, in the embodiment of the present disclosure, whether the second device is triggered to perform data retransmission by considering the resource conflict detected by the first user equipment and the HARQ feedback of the second user equipment at the same time has the following four cases:

fig. 11 is a flowchart illustrating a resource selection method according to an exemplary embodiment, where the resource selection method is used in a second user equipment as shown in fig. 11, and includes the following steps.

In step S101, in response to receiving the collision indication sent by the first user equipment and the received HARQ ACK, retransmitting data correspondingly transmitted by the resource where the resource collision has occurred.

In another embodiment, the second device may determine that resource reselection is required if the collision indication indicates that resource collision is about to occur in resources used for data transmission by the second user equipment.

Fig. 12 is a flowchart illustrating a resource selection method according to an exemplary embodiment, where the resource selection method is used in a second user equipment as shown in fig. 12, and includes the following steps.

In step S111, in response to receiving the collision indication sent by the first user equipment, the resource for data transmission is reselected based on the auxiliary resource set sent by the first user equipment.

If the conflict indication is used to indicate that a resource conflict is about to occur in the resource for data transmission by the second user equipment, it may also be understood that the conflict indication is used to indicate that the second user equipment no longer selects the resource for data transmission in which the resource conflict is about to occur.

In this embodiment of the present disclosure, when the second user equipment performs resource reselection, the resource reselection may be performed based on the auxiliary resource set sent by the first user equipment and the resource perceived by the second user equipment. The auxiliary resource set sent by the first user equipment comprises a resource set recommended to be used by the second user equipment and a resource set not recommended to be used by the second user equipment, and resource reselection is performed, so that resource conflict is avoided in the future.

The embodiments of the present disclosure will be described below with reference to an example. The first user equipment is referred to as UEA, the second user equipment is referred to as UEB, and the third user equipment is referred to as UEC.

In the disclosed embodiment, when the predefined condition that ue a detects a collision is satisfied, ue a is triggered to send the auxiliary resource set to ue b. There may be two cases where the UEA detects a collision:

case 1: a conflict has occurred.

Case 2: the coincidence (partial or total coincidence) of reserved resources causes a collision to occur in the future.

For case 1: a schematic diagram of the UEA detecting that a collision has occurred is shown in fig. 13.

Step 1: the ue a detects that a collision has occurred, at which time the ue a immediately sends an auxiliary resource set and a collision indication to the ue b, the collision indication indicates the location of the time-frequency domain resource where the collision occurred, and the ue b knows which data to retransmit according to the collision indication.

step 2: when the UEB retransmits the data, the auxiliary resource set and the perceived resource of the UE B are considered at the same time, the auxiliary resource set comprises a resource set recommended to be used by the UEB and a resource set not recommended to be used by the UEB, and the data is retransmitted by selecting the resource, so that the reliability can be improved.

In this scheme, when the UEA assists the UEB retransmission, the following two schemes are mainly used:

scheme 1. retransmission of UEB is directly triggered by UEA detecting a collision, UEB does not consider whether HARQ feedback is received or not. Upon receiving an indication of a collision sent by ue a to ue b, ue b starts the retransmission.

Scheme 2 retransmission of UEB is triggered taking into account both ue a detected collision and HARQ feedback of UEB. In the scenario of unicast and multicast HARQ option2, the unicast HARQ feedback specified by R16 supports NACK/ACK, and the option2 in multicast supports NACK/ACK (the HARQ feedback of the option in multicast only feeds back NACK), which may be the following four cases:

further, the following scheme may be adopted for how the UEA detects that a collision has occurred:

by measuring the RSSI value on each sub-channel (sub-channnel). If the RSSI value is greater than the threshold value, the threshold value is pre-configured through RRC, and the collision occurs on the sub-channnel. When a collision occurs, it is described that a plurality of UEs transmit data and a plurality of received signals exist simultaneously in the sub-channnel, and the received signals interfere with each other, so that the collision is detected using the RSSI.

For case 2: a schematic diagram of future collisions caused by overlapping (partial or full overlapping) of reserved resources is shown in fig. 14.

Step 1: UEA finds that they reserve time and frequency resources that coincide with each other by decoding into SCIs of UEB and other UEs (e.g., UEC).

step 2: ue a sends the secondary resource set and a collision indication to ue b, where the collision indication indicates that ue b is no longer selecting the block of resources for data transmission. And the UE B considers the auxiliary resource set and the perceived resource thereof, wherein the auxiliary resource set comprises a resource set recommended to be used by the UE B and a resource set not recommended to be used by the UE B, and performs resource reselection, so that the occurrence of future conflict is avoided.

Further, for how the UEA detects an imminent collision, the following scheme may be adopted:

the method comprises the steps that the UE A detects SCIs of different UEs and reserves mutually coincident time and frequency resources, when the UE A receives SCIs of different UE Bs and other UEs, firstly, a certain coincidence of the reserved time-frequency resources of the two UEs is detected by decoding a reservation time/frequency resource information field in the first-stage SCI, namely sub-channel and slot where the resources are located are coincident, then, when the second-stage SCI is decoded, source IDs of the two UEs which reserve the coincident resources are respectively obtained, and at the moment, the UE A sends an auxiliary resource set and a conflict indication to the UE B according to the corresponding source IDs.

Further, the set of secondary resources and the collision indication are carried by either the second SCI or the first SCI. A collision indication for indicating a location of the time-frequency domain resource where a collision has occurred or is about to occur.

The resource selection method provided by the embodiment of the disclosure solves the problem that when the UE A transmits the auxiliary resource set to the UE B when the UE A assists the UE B resource selection.

Based on the same conception, the embodiment of the disclosure also provides a resource selection device.

It is understood that the resource selection apparatus provided by the embodiments of the present disclosure includes hardware structures and/or software modules for performing the functions described above. The disclosed embodiments can be implemented in hardware or a combination of hardware and computer software, in combination with the exemplary elements and algorithm steps disclosed in the disclosed embodiments. Whether a function is performed as hardware or computer software drives hardware depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present disclosure.

FIG. 15 is a block diagram illustrating a resource selection apparatus according to an example embodiment. Referring to fig. 15, a resource selection apparatus 100 is applied to a first user equipment, and the resource selection apparatus 100 includes a transmission unit 101.

A sending unit 101 configured to send, in response to determining that the resource for data transmission by the second user equipment satisfies the resource conflict condition, the auxiliary resource set to the second user equipment.

In one embodiment, an impending resource collision of resources for data transmission by a second user equipment includes: and partially or completely overlapped resources exist between the first reserved resources indicated by the direct connection link control information of the second user equipment and the second reserved resources indicated by the direct connection link control information of the third user equipment.

In one embodiment, the sending unit 101 is further configured to: and sending a conflict indication to the second user equipment, wherein the conflict indication is used for indicating the resource conflict condition.

In an embodiment, the sending unit 101 sends at least one of the auxiliary resource set and the collision indication to the second user equipment based on the first-stage direct link control information or the second-stage direct link control information.

FIG. 16 is a block diagram illustrating a resource selection apparatus according to an example embodiment. Referring to fig. 16, the resource selection apparatus 200 is applied to a second user equipment, and the resource selection apparatus 200 includes a receiving unit 201.

A receiving unit 201, configured to receive an auxiliary resource set sent by a first user equipment, where the auxiliary resource set is sent by the first user equipment when the first user equipment determines that a resource for data transmission by a second user equipment meets a resource conflict condition.

In one embodiment, an impending resource collision of resources for data transmission by a second user equipment includes: and a resource which is overlapped exists between a first reserved resource indicated by the direct connection link control information of the second user equipment and a second reserved resource indicated by the direct connection link control information of the third user equipment.

In one embodiment, the receiving unit 201 is further configured to: and receiving a conflict indication sent by the first user equipment, wherein the conflict indication is used for indicating a resource conflict condition.

In one embodiment, the resource selection apparatus 200 further includes a transmitting unit 202, and the transmitting unit 202 is configured to:

in response to the receiving unit 201 receiving the conflict indication sent by the first user equipment, retransmitting the data correspondingly transmitted by the resource where the resource conflict has occurred.

in response to the receiving unit 201 receiving the collision indication sent by the first user equipment and the received HARQ feedback acknowledgement, retransmitting the data correspondingly transmitted by the resource where the resource collision has occurred.

In one embodiment, the resource selection apparatus 200 further includes a transmitting unit 202 configured to: in response to the receiving unit 201 receiving the collision indication sent by the first user equipment, the resource for data transmission is reselected based on the auxiliary resource set.

In an embodiment, the receiving unit 201 receives at least one of an auxiliary resource set and a collision indication sent by a first user equipment based on first-stage direct link control information or second-stage direct link control information.

With regard to the apparatus in the above-described embodiment, the specific manner in which each module performs the operation has been described in detail in the embodiment related to the method, and will not be elaborated here.

FIG. 17 is a block diagram illustrating an apparatus 300 for resource selection in accordance with an example embodiment. The apparatus 300 may be the first user equipment or the second user equipment according to the above embodiments. For example, the apparatus 300 may be a mobile phone, a computer, a digital broadcast terminal, a messaging device, a game console, a tablet device, a medical device, an exercise device, a personal digital assistant, and the like.

Referring to fig. 17, the apparatus 300 may include one or more of the following components: a processing component 302, a memory 304, a power component 306, a multimedia component 308, an audio component 310, an input/output (I/O) interface 312, a sensor component 314, and a communication component 316.

The processing component 302 generally controls overall operation of the device 300, such as operations associated with display, telephone calls, data communications, camera operations, and recording operations. The processing components 302 may include one or more processors 320 to execute instructions to perform all or a portion of the steps of the methods described above. Further, the processing component 302 can include one or more modules that facilitate interaction between the processing component 302 and other components. For example, the processing component 302 may include a multimedia module to facilitate interaction between the multimedia component 308 and the processing component 302.

The memory 304 is configured to store various types of data to support operations at the apparatus 300. Examples of such data include instructions for any application or method operating on device 300, contact data, phonebook data, messages, pictures, videos, and so forth. The memory 304 may be implemented by any type or combination of volatile or non-volatile memory devices, such as Static Random Access Memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic or optical disks.

Power components 306 provide power to the various components of device 300. The power components 306 may include a power management system, one or more power sources, and other components associated with generating, managing, and distributing power for the apparatus 300.

The multimedia component 308 includes a screen that provides an output interface between the device 300 and a user. In some embodiments, the screen may include a Liquid Crystal Display (LCD) and a Touch Panel (TP). If the screen includes a touch panel, the screen may be implemented as a touch screen to receive an input signal from a user. The touch panel includes one or more touch sensors to sense touch, slide, and gestures on the touch panel. The touch sensor may not only sense the boundary of a touch or slide action, but also detect the duration and pressure associated with the touch or slide operation. In some embodiments, the multimedia component 308 includes a front facing camera and/or a rear facing camera. The front camera and/or the rear camera may receive external multimedia data when the device 300 is in an operating mode, such as a shooting mode or a video mode. Each front camera and rear camera may be a fixed optical lens system or have a focal length and optical zoom capability.

The audio component 310 is configured to output and/or input audio signals. For example, audio component 310 includes a Microphone (MIC) configured to receive external audio signals when apparatus 300 is in an operating mode, such as a call mode, a recording mode, and a voice recognition mode. The received audio signals may further be stored in the memory 304 or transmitted via the communication component 316. In some embodiments, audio component 310 also includes a speaker for outputting audio signals.

The I/O interface 312 provides an interface between the processing component 302 and peripheral interface modules, which may be keyboards, click wheels, buttons, etc. These buttons may include, but are not limited to: a home button, a volume button, a start button, and a lock button.

The sensor assembly 314 includes one or more sensors for providing various aspects of status assessment for the device 300. For example, sensor assembly 314 may detect an open/closed state of device 300, the relative positioning of components, such as a display and keypad of device 300, the change in position of device 300 or a component of device 300, the presence or absence of user contact with device 300, the orientation or acceleration/deceleration of device 300, and the change in temperature of device 300. Sensor assembly 314 may include a proximity sensor configured to detect the presence of a nearby object without any physical contact. The sensor assembly 314 may also include a light sensor, such as a CMOS or CCD image sensor, for use in imaging applications. In some embodiments, the sensor assembly 314 may also include an acceleration sensor, a gyroscope sensor, a magnetic sensor, a pressure sensor, or a temperature sensor.

The communication component 316 is configured to facilitate wired or wireless communication between the apparatus 300 and other devices. The device 300 may access a wireless network based on a communication standard, such as WiFi, 2G or 3G, or a combination thereof. In an exemplary embodiment, the communication component 316 receives a broadcast signal or broadcast related information from an external broadcast management system via a broadcast channel. In an exemplary embodiment, the communication component 316 further includes a Near Field Communication (NFC) module to facilitate short-range communications. For example, the NFC module may be implemented based on Radio Frequency Identification (RFID) technology, infrared data association (IrDA) technology, Ultra Wideband (UWB) technology, Bluetooth (BT) technology, and other technologies.

In an exemplary embodiment, the apparatus 300 may be implemented by one or more Application Specific Integrated Circuits (ASICs), Digital Signal Processors (DSPs), Digital Signal Processing Devices (DSPDs), Programmable Logic Devices (PLDs), Field Programmable Gate Arrays (FPGAs), controllers, micro-controllers, microprocessors or other electronic components for performing the above-described methods.

In an exemplary embodiment, a non-transitory computer-readable storage medium comprising instructions, such as the memory 304 comprising instructions, executable by the processor 320 of the apparatus 300 to perform the above-described method is also provided. For example, the non-transitory computer readable storage medium may be a ROM, a Random Access Memory (RAM), a CD-ROM, a magnetic tape, a floppy disk, an optical data storage device, and the like.

It is further understood that the use of "a plurality" in this disclosure means two or more, as other terms are analogous. "and/or" describes the association relationship of the associated objects, meaning that there may be three relationships, e.g., a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship. The singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.

It will be further understood that the terms "first," "second," and the like are used to describe various information and that such information should not be limited by these terms. These terms are only used to distinguish one type of information from another and do not denote a particular order or importance. Indeed, the terms "first," "second," and the like are fully interchangeable. For example, first information may also be referred to as second information, and similarly, second information may also be referred to as first information, without departing from the scope of the present disclosure.

It is further to be understood that while operations are depicted in the drawings in a particular order, this is not to be understood as requiring that such operations be performed in the particular order shown or in serial order, or that all illustrated operations be performed, to achieve desirable results. In certain environments, multitasking and parallel processing may be advantageous.

Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This application is intended to cover any variations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.

It will be understood that the present disclosure is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A resource selection method applied to a first User Equipment (UE), the resource selection method comprising:

in response to determining that resources for data transmission by a second user equipment satisfy a resource conflict condition, transmitting an auxiliary resource set to the second user equipment.

2. The method of claim 1, wherein the resource conflict condition comprises:

3. The method of claim 2, wherein the resource conflict occurs in the resource for data transmission by the second user equipment, and comprises:

4. The method of claim 1, wherein the resource conflict condition comprises:

resource conflict of the resources of the second user equipment for data transmission is about to occur.

5. The method of claim 4, wherein the resource collision of the resource for the second UE for data transmission is about to occur, and comprises:

6. The method of claim 1, further comprising:

sending a conflict indication to the second user equipment, wherein the conflict indication is used for indicating the resource conflict condition.

7. The method of claim 1 or 6, wherein at least one of a secondary resource set and a collision indication is sent to the second user equipment based on first-stage direct link control information or second-stage direct link control information.

8. A resource selection method is applied to a second user equipment, and comprises the following steps:

receiving an auxiliary resource set sent by a first user equipment, wherein the auxiliary resource set is sent by the first user equipment when the first user equipment determines that resources for data transmission of a second user equipment meet a resource conflict condition.

9. The method of claim 8, wherein the resource conflict condition comprises:

10. The method of claim 9, wherein the resource conflict occurs in the resource for data transmission by the second ue, and comprises:

11. The method of claim 8, wherein the resource conflict condition comprises:

12. The method of claim 11, wherein the resource collision of the resource for the second ue to perform data transmission is about to occur, comprising:

13. The method of claim 8, further comprising:

14. The method of claim 9, 10 or 13, wherein the method further comprises:

and in response to receiving the conflict indication sent by the first user equipment, retransmitting the data correspondingly transmitted by the resource with the resource conflict.

15. The method of claim 9, 10 or 13, wherein the method further comprises:

and in response to receiving the conflict indication sent by the first user equipment and the received HARQ feedback confirmation, retransmitting the data which is transmitted by the resource with the resource conflict.

16. The method of claim 11, 12 or 13, wherein the method further comprises:

and in response to receiving the conflict indication sent by the first user equipment, reselecting resources for data transmission based on the auxiliary resource set.

17. The method of claim 8 or 13, wherein at least one of the set of auxiliary resources and the indication of collision sent by the first user equipment is received based on first stage direct link control information or second stage direct link control information.

18. A resource selection apparatus, applied to a first user equipment, the resource selection apparatus comprising:

19. The resource selection apparatus of claim 18, wherein the resource conflict condition comprises:

20. The apparatus as claimed in claim 19, wherein the resource conflict occurs in the resource of the second ue for data transmission, comprising:

21. The resource selection apparatus of claim 18, wherein the resource conflict condition comprises:

22. The apparatus as claimed in claim 21, wherein the resource collision of the resource for the second ue to perform data transmission comprises:

23. The resource selection apparatus of claim 18, wherein the sending unit is further configured to:

24. The apparatus according to claim 18 or 23, wherein the sending unit sends at least one of a secondary resource set and a collision indication to the second ue based on first stage direct link control information or second stage direct link control information.

25. A resource selection apparatus, applied to a second user equipment, the resource selection apparatus comprising:

26. The resource selection apparatus of claim 25, wherein the resource conflict condition comprises:

27. The apparatus as claimed in claim 26, wherein the resource conflict occurs in the resource of the second ue for data transmission, comprising:

28. The resource selection apparatus of claim 25, wherein the resource conflict condition comprises:

29. The apparatus as claimed in claim 28, wherein the resource collision of the resource for the second ue to perform data transmission comprises:

30. The resource selection apparatus of claim 25, wherein the receiving unit is further configured to:

31. The resource selection apparatus according to claim 26, 27 or 30, wherein the apparatus further comprises a transmitting unit configured to:

32. The resource selection apparatus according to claim 26, 27 or 30, wherein the apparatus further comprises a transmitting unit configured to:

33. The resource selection apparatus according to claim 28, 29 or 30, wherein the apparatus further comprises a transmitting unit configured to:

34. The apparatus of claim 25 or 30, wherein the receiving unit receives at least one of an auxiliary resource set and a collision indication sent by the first user equipment based on first stage direct link control information or second stage direct link control information.

35. A resource selection apparatus, comprising:

a processor;

a memory for storing processor-executable instructions;

wherein the processor is configured to: performing the resource selection method of any one of claims 1 to 7, or performing the resource selection method of any one of claims 8 to 17.

36. A non-transitory computer readable storage medium having instructions which, when executed by a processor of a mobile terminal, enable the mobile terminal to perform the resource selection method of any one of claims 1 to 7 or to perform the resource selection method of any one of claims 8 to 17.