CN114071398A - Auxiliary link communication method and communication device - Google Patents

Auxiliary link communication method and communication device Download PDF

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Publication number
CN114071398A
CN114071398A CN202010761937.6A CN202010761937A CN114071398A CN 114071398 A CN114071398 A CN 114071398A CN 202010761937 A CN202010761937 A CN 202010761937A CN 114071398 A CN114071398 A CN 114071398A
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resource
electronic device
auxiliary link
resources
control information
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曲鑫
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Beijing Ziguang Zhanrui Communication Technology Co Ltd
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Beijing Ziguang Zhanrui Communication Technology Co Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/30—Services specially adapted for particular environments, situations or purposes
    • H04W4/40—Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H04W28/06—Optimizing the usage of the radio link, e.g. header compression, information sizing, discarding information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/51—Allocation or scheduling criteria for wireless resources based on terminal or device properties

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  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
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Abstract

The embodiment of the application provides an auxiliary link communication method and device, wherein a third electronic device obtains a reference resource selected by a first electronic device for a second electronic device and an auxiliary link communication resource selected by the second electronic device from the reference resource in a sensing mode. Then, other resources except the communication resources of the auxiliary link in the reference resources are listed in the candidate resource pool set of the reference resources, so that the candidate resource pool set comprises more candidate resources, and further more resources are used for communication of the auxiliary link, and therefore the resource utilization rate can be improved.

Description

Auxiliary link communication method and communication device
Technical Field
The embodiment of the application relates to the technical field of communication, in particular to an auxiliary link communication method and a communication device.
Background
Vehicle to anything (V2X) communication is a key technical direction of the protocol version 16(Release 16, R16), and NR V2X is a key technical means for enabling vehicle networking as an enhancement of Long Term Evolution (LTE) V2X.
In V2X communication, V2X devices communicate with each other via a secondary link (sidelink). For V2X communication, there are two resource allocation manners, the first is a scheduled resource allocation (scheduled resource allocation) manner, in which a network device configures resources for V2X device for secondary link communication, and the manner is mainly applied to a mode (mode3) in LTE V2X communication and a mode 1 in NR V2X communication; the second approach is a resource selection approach based on sensing, which does not require the network device to schedule resources, and is mainly applied to mode4 in LTE V2X communication and mode2 in NR V2X communication. In the resource selection manner based on sensing, the V2X device receives a secondary link control channel (PSCCH) sent by another V2X device within a resource sensing window, and determines reserved resources of the other V2X device according to the PSCCH. Then, the reserved resources are excluded from the resource selection window, and the resources used for the secondary link communication are selected from the remaining available resources.
However, if the V2X device does not select the whole reserved resource, it causes part of the reserved resource to be idle, resulting in resource waste.
Disclosure of Invention
The embodiment of the application provides an auxiliary link communication method and a communication device.
In a first aspect, an embodiment of the present application provides a secondary link communication method, including:
the third electronic device receives first auxiliary link control information from a first electronic device, wherein the first auxiliary link control information is used for indicating a reference resource, the reference resource is a resource selected by the first electronic device for a second electronic device, and the reference resource is a resource referred to by the second electronic device when the second electronic device selects an auxiliary link communication resource;
the third electronic device receives second auxiliary link control information from the second electronic device, where the second auxiliary link control information is used to indicate an auxiliary link communication resource selected by the second electronic device from the reference resource;
the third electronic device adding other resources of the reference resources except the secondary link communication resource to a candidate resource set;
the third electronic device uses resources in the candidate set of resources for secondary link communication.
In one possible design, before the third electronic device adds the other resource of the reference resource except the secondary link communication resource to the candidate resource set, the method further includes:
the third electronic equipment acquires the receiving power of the auxiliary link reference signal;
the third electronic equipment determines whether the auxiliary link reference signal receiving power is greater than a preset threshold;
when the secondary link reference signal received power is greater than the preset threshold, the third electronic device excludes the reference resource from the candidate resource set.
In one possible design, the obtaining, by the third electronic device, the secondary link reference signal received power includes:
the third electronic equipment measures a demodulation reference signal (DMRS) of an auxiliary link control channel to obtain the reference signal receiving power, wherein the auxiliary link control channel is a channel for bearing the first auxiliary link control information;
alternatively, the first and second electrodes may be,
and the third electronic equipment measures a demodulation reference signal (DMRS) of an auxiliary link data channel to obtain the reference signal receiving power, wherein the auxiliary link data channel is the data channel indicated by the first auxiliary link control information.
In one possible design, the adding, by the third electronic device, the other resource of the reference resource except the secondary link communication resource to the candidate resource set includes:
the third electronic device determines whether a first device identifier and a second device identifier are the same, where the first device identifier is an identifier of the second electronic device carried by the first auxiliary link control information, and the second device identifier is an identifier of the second electronic device carried by the second auxiliary link control information;
and if the first equipment identifier is the same as the second equipment identifier, adding other resources except the auxiliary link communication resource in the reference resource to a candidate resource set.
In one possible design, the adding, by the third electronic device, the other resource of the reference resource except the secondary link communication resource to the candidate resource set includes:
the third electronic device determining whether the first secondary link control information indicates that the second electronic device refers to the reference resource when selecting a secondary link communication resource;
if the first auxiliary link control information indicates that the second electronic device refers to the reference resource when selecting the auxiliary link communication resource, the third electronic device adds other resources except the auxiliary link communication resource in the reference resource to a candidate resource set.
In a feasible design, the reference resource is a periodic resource, each period includes at least two resources with the same time-frequency size, in a first period, the first auxiliary link control information is carried on a first block of resources in the first period, and the second auxiliary link control information is carried on other resources except the first block of resources in the first period.
In one possible design, the first secondary link control information further carries one or more of the following information: the time domain information of the reference resource, the frequency domain information of the reference resource, or the reservation period information of the reference resource.
In a second aspect, an embodiment of the present application provides a communication apparatus, including:
a receiving unit, configured to receive first auxiliary link control information from a first electronic device, where the first auxiliary link control information is used to indicate a reference resource, the reference resource is a resource selected by the first electronic device for a second electronic device, and the reference resource is a resource referred to when the second electronic device selects an auxiliary link communication resource;
the receiving unit is further configured to receive second secondary link control information from the second electronic device, where the second secondary link control information is used to indicate a secondary link communication resource selected by the second electronic device from the reference resource;
and the processing unit is used for adding other resources except the auxiliary link communication resource in the reference resource to a candidate resource set and carrying out auxiliary link communication according to the candidate resource set.
In a feasible design, before adding other resources except the secondary link communication resource in the reference resource to the candidate resource set, the processing unit is further configured to obtain a secondary link reference signal received power, and determine whether the secondary link reference signal received power is greater than a preset threshold; and when the secondary link reference signal received power is greater than the preset threshold, excluding the reference resource from the candidate resource set.
In a feasible design, when acquiring the reference signal received power of the secondary link, the processing unit is configured to measure a demodulation reference signal DMRS of a secondary link control channel to obtain the reference signal received power, where the secondary link control channel is a channel for carrying the first secondary link control information;
alternatively, the first and second electrodes may be,
and the processing unit is used for measuring a demodulation reference signal (DMRS) of an auxiliary link data channel when acquiring the reference signal receiving power of an auxiliary link, so as to obtain the reference signal receiving power, wherein the auxiliary link data channel is a data channel indicated by the first auxiliary link control information.
In a feasible design, when adding other resources except the secondary link communication resource in the reference resource to a candidate resource set, the processing unit is configured to determine whether a first device identifier and a second device identifier are the same, and if the first device identifier and the second device identifier are the same, add other resources except the secondary link communication resource in the reference resource to the candidate resource set, where the first device identifier is an identifier of a second electronic device carried by the first secondary link control information, and the second device identifier is an identifier of a second electronic device carried by the second secondary link control information.
In a possible design, when the processing unit adds other resources than the secondary link communication resource in the reference resource to the candidate resource set, the processing unit is configured to determine whether the first secondary link control information indicates that the second electronic device refers to the reference resource when selecting the secondary link communication resource; and when the first auxiliary link control information indicates that the second electronic equipment refers to the reference resource when selecting the auxiliary link communication resource, adding other resources except the auxiliary link communication resource in the reference resource to a candidate resource set.
In a feasible design, the reference resource is a periodic resource, each period includes at least two resources with the same time-frequency size, in a first period, the first auxiliary link control information is carried on a first block of resources in the first period, and the second auxiliary link control information is carried on other resources except the first block of resources in the first period.
In one possible design, the first secondary link control information further carries one or more of the following information: the time domain information of the reference resource, the frequency domain information of the reference resource, or the reservation period information of the reference resource.
In a third aspect, an embodiment of the present application provides an electronic device, which includes a processor, a memory, and a computer program stored on the memory and executable on the processor, where the processor executes the program to enable the electronic device to implement the method in the first aspect or the various possible implementation manners of the first aspect.
In a fourth aspect, embodiments of the present application provide a computer program product containing instructions, which when run on an electronic device, cause the electronic device computer to perform the method of the first aspect or the various possible implementations of the first aspect.
In a fifth aspect, embodiments of the present application provide a readable storage medium, which has stored therein instructions, which, when run on an electronic device, cause the electronic device to perform the method according to the first aspect or the various possible implementation manners of the first aspect.
According to the auxiliary link communication method and device provided by the embodiment of the application, the third electronic device obtains the reference resource selected by the first electronic device for the second electronic device and the auxiliary link communication resource selected by the second electronic device from the reference resource in a sensing manner. Then, other resources except the communication resources of the auxiliary link in the reference resources are listed in the candidate resource pool set of the reference resources, so that the candidate resource pool set comprises more candidate resources, and further more resources are used for communication of the auxiliary link, and therefore the resource utilization rate can be improved.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.
Fig. 1A is a schematic diagram of a network architecture to which the secondary link communication method provided in the embodiment of the present application is applied;
fig. 1B is a schematic view of a scenario to which the secondary link communication method provided in the embodiment of the present application is applied;
fig. 2 is a flowchart of a secondary link communication method according to an embodiment of the present application;
fig. 3 is a schematic diagram of excluding secondary link communication resources in a secondary link communication method provided in an embodiment of the present application;
fig. 4 is a schematic structural diagram of a communication device according to an embodiment of the present application;
fig. 5 is a schematic structural diagram of an electronic device according to an embodiment of the present application.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
In V2X communication, from the perspective of whether network devices need to be scheduled through high-level signaling, resource allocation modes are divided into a scheduling resource allocation mode and a resource selection mode based on sensing. Based on the perceived resource selection mode, it is actually a process that the V2X device receives the PSCCH of other V2X devices in the resource perception window, determines the reserved resources of other V2X devices according to the PSCCH, excludes the reserved resources from the resource selection window, and selects resources for secondary link communication from the remaining resources.
In the resource sensing manner, no matter the LET V2X communication or the NR V2X communication is performed, due to half duplex, the V2X device cannot receive the PSCCH transmitted by another V2X device while transmitting the secondary link data, and thus the V2X device cannot exclude the reserved resources of another V2X device in the resource selection window. To solve this problem, a scheme is introduced that excludes all possible reserved resources. In this scheme, when the V2X device transmits the secondary link data at a certain time slot within the resource sensing window, a group of time slots is obtained according to the time slot and all possible reservation periods of the reserved resource, and the time slots falling within the resource selection window in the group of time slots are excluded from the reserved resource.
In LTE V2X communication, since traffic between V2X devices is periodic traffic, the problem that the V2X device cannot exclude reserved resources from the resource selection window can be solved to some extent based on the above exclusion scheme. However, when the period of the periodic service is short or large, it is easy to cause no resource to be selected or few resources to be selected in the resource selection window, thereby causing the communication failure of V2X. Furthermore, the NR V2X communication supports more flexible reservation periods, which may be more likely to result in no or few resources being selectable within the resource selection window if the above-described exclusion scheme is continued.
For this reason, the following mechanism is now considered: the V2X device requests other devices to indicate a set of reference resources for which the V2X device refers to when selecting a secondary link communication resource. However, if the V2X device does not use all the reference resources, it will result in partial resource waste.
The embodiment of the application provides an auxiliary link communication method and a communication device.
First, terms related to embodiments of the present application will be explained.
The first electronic device selects the electronic device of the reference resource for the second electronic device.
A second electronic device requesting the electronic device for which the first electronic device selects the reference resource. And when the auxiliary link communication resource is selected subsequently, the second electronic equipment refers to the reference resource to select the auxiliary link communication resource.
And the third electronic equipment lists the free resources in the reserved resources of the second electronic equipment into the electronic equipment of the candidate resource set of the third electronic equipment.
Fig. 1A is a schematic diagram of a network architecture to which the secondary link communication method provided in the embodiment of the present application is applied. Referring to fig. 1A, the network architecture is a communication network architecture of V2X. V2X communication includes communication between a vehicle and a vehicle (V2V), communication between a vehicle and a roadside infrastructure (V2I), communication between a vehicle and a pedestrian (V2P), communication between a vehicle and a network (V2N), and the like, which are collectively referred to as V2X (X stands for anything). The first electronic device, the second electronic device, and the third electronic device are each any one of a vehicle, an electronic device of a pedestrian, a Road Side Unit (RSU), and the like.
Fig. 1B is a scene schematic diagram to which the secondary link communication method provided in the embodiment of the present application is applied. Referring to fig. 1B, the first electronic device, the second electronic device, and the third electronic device are all vehicles, and the second electronic device requests the first electronic device to select a set of reference resources for the first electronic device. And the second electronic equipment indicates the selected reference resource to the second electronic equipment. And the third electronic equipment brings the resources which are not used by the second electronic equipment in the reference resources into the candidate resource pool of the third electronic equipment based on a perception mode and the like.
Next, based on the above noun explanation and the network architectures shown in fig. 1A and fig. 1B, the secondary link communication method according to the embodiment of the present application is described in detail. For example, see fig. 2. Fig. 2 is a flowchart of a secondary link communication method provided in an embodiment of the present application, and the embodiment is described from the perspective of interaction between a third electronic device and a first electronic device, and between the third electronic device and a second electronic device. The embodiment comprises the following steps:
101. the third electronic device receives the first secondary link control information from the first electronic device.
The first auxiliary link control information is used to indicate a reference resource, where the reference resource is a resource selected by the first electronic device for the second electronic device, and the reference resource is a resource referred to when the second electronic device selects an auxiliary link communication resource.
Illustratively, when the second electronic device adopts the inter-user cooperation mode, the second electronic device instructs the first electronic device to select a set of reference resources for the second electronic device. The reference resource is, for example, a periodically reserved resource, which is a resource recommended for the second electronic device to use.
After selecting the reference resource for the second electronic device, the first electronic device sends the first auxiliary link control information to the second electronic device to indicate the set of reference resources to the second electronic device. The third electronic device is capable of perceiving the first secondary link control information within the resource awareness window. Thus, the third electronic device is able to perceive that the reference resource is a resource reserved for the second electronic device.
102. And the third electronic equipment receives second auxiliary link control information from the second electronic equipment, wherein the second auxiliary link control information is used for indicating an auxiliary link communication resource selected by the second electronic equipment from the reference resource.
And after receiving the first auxiliary link control information, the second electronic equipment selects resources for auxiliary link communication from the reference resources when selecting the auxiliary link resources. Thereafter, the second electronic device transmits second secondary link control information indicating resources of the reference resources that are periodically reserved by the second electronic device. In each period, the resources reserved by the second electronic device are a subset or a full set of the reference resources in the corresponding period. In addition, when the second electronic device selects the secondary link communication resource, it is highly possible that other resources than the reference resource are also selected in a perceptual manner. Therefore, the second secondary link control information also indicates the resources that are periodically reserved by the second electronic device in a perceptual manner.
103. The third electronic device adds other resources of the reference resources than the secondary link communication resource to a set of candidate resources.
When the electronic device selects the secondary link communication resource from the reference resources, and does not select all the reference resources, there will be a part of idle reference resources in each period. At this time, the third electronic device includes the partially idle reference resource in its own candidate resource set.
104. The third electronic device uses the resources in the candidate resource set for secondary link communication.
Illustratively, the candidate resource set of the third electronic device includes, in addition to the resource obtained by the sensing manner, the resource obtained by the above step 101 and step 103. That is to say, by adopting the scheme of the embodiment of the present application, more resources can be listed in the candidate resource pool of the third electronic device.
In the auxiliary link communication method provided by the embodiment of the application, the third electronic device obtains, in a sensing manner, the reference resource selected by the first electronic device for the second electronic device, and the auxiliary link communication resource selected by the second electronic device from the reference resource. Then, other resources except the communication resources of the auxiliary link in the reference resources are listed in the candidate resource pool set of the reference resources, so that the candidate resource pool set comprises more candidate resources, and further more resources are used for communication of the auxiliary link, and therefore the resource utilization rate can be improved.
In the foregoing embodiment, after receiving the first auxiliary link control information from the first electronic device, the third electronic device can perceive the periodic reference resource reserved by the first electronic device for the second electronic device. The reference resource is excluded from its own set of candidate resources to avoid resource conflicts with the second electronic device. In addition, under some conditions, the third electronic device may not exclude the reference resource from its own candidate resource set.
Illustratively, before the third electronic device adds other resources except the secondary link communication resource in the reference resource to the candidate resource set, a secondary link reference signal receiving power (SL-RSRP) is also obtained. The SL-RSRP is also referred to as layer 1 (L1) SL-RSRP, and is denoted as L1 SL-RSRP. And then, the third electronic device judges whether the L1SL-RSRP is larger than a preset threshold, and if the L1SL-RSRP is larger than the preset threshold, the third electronic device excludes the reference resource from the candidate resource set. If the L1SL-RSRP is less than or equal to the preset threshold, the third electronic device does not exclude the reference resource from its candidate resource set.
By adopting the scheme, the reference resource is excluded from the candidate resource pool by the third electronic equipment only when the L1SL-RSRP is larger than the preset threshold, so that enough resources are ensured to be in the candidate resource pool of the third electronic equipment, and the reliability of auxiliary link communication is improved.
In the above embodiment, the first electronic device sends the first secondary link control information on the secondary link control channel. Therefore, the third electronic device can measure a demodulation reference signal (DMRS) on the secondary link control channel, thereby obtaining the above L1 SL-RSRP. In addition, the first secondary link control information also indicates a secondary link data channel. Therefore, the third electronic device can also measure the DMRS on the secondary link data channel, resulting in the L1SL-RSRP described above.
By adopting the scheme, the purpose that the third electronic equipment flexibly acquires the L1SL-RSRP is achieved by measuring the DMRS on the auxiliary link control channel or the auxiliary link data channel.
In the above embodiment, when the third electronic device adds other resources, except the secondary link communication resource, in the reference resource to the candidate resource set, it is determined whether both the first secondary link control information and the second secondary link control information include the device identifier of the second electronic device. And if the first auxiliary link control information and the second auxiliary link control information both contain the equipment identification of the second electronic equipment, adding other resources except the auxiliary link communication resource in the reference resource to the candidate resource set.
For example, since there are likely to be a plurality of second electronic devices adopting the inter-user cooperation method, there are likely to be a plurality of first auxiliary link control information and a plurality of second auxiliary link control information. At this time, when the third electronic device determines the idle resource, the secondary link communication resource selected by the second electronic device needs to be excluded from a reference resource of the second electronic device. Therefore, the first auxiliary link control information and the second auxiliary link control information both carry the device identifier of the second electronic device. After receiving the first auxiliary link control information and the second auxiliary link control information, the third electronic device determines whether the two auxiliary link control information carry the same device identifier, that is, whether the first device identifier carried by the first auxiliary link control information is the same as the second device identifier carried by the second auxiliary link control information. If the first device identifier is the same as the second device identifier, it is indicated that the reference resource indicated by the first auxiliary link control information and the auxiliary link communication resource indicated by the second auxiliary link control information are for the same second electronic device, and therefore, the third electronic device adds other resources except the auxiliary link communication resource in the reference resource to the candidate resource set. And if the first equipment identifier is different from the second equipment identifier, indicating that the reference resource indicated by the first auxiliary link control information and the auxiliary link communication resource indicated by the second auxiliary link control information are directed to different second electronic equipment.
By adopting the scheme, the device identifiers carried by the two auxiliary link control information are compared, so that the third electronic device is ensured to wrongly judge partial resources in the reference resources of a certain second electronic device as idle resources.
In the above embodiment, when the third electronic device adds other resources, except the secondary link communication resource, in the reference resource to the candidate resource set, it is determined whether the first secondary link control information indicates that the second electronic device refers to the reference resource when selecting the secondary link communication resource; if the first auxiliary link control information indicates that the second electronic device refers to the reference resource when selecting the auxiliary link communication resource, the third electronic device adds other resources except the auxiliary link communication resource in the reference resource to a candidate resource set.
Illustratively, the third electronic device determines whether a format of the first auxiliary link control information satisfies a preset format, where the first auxiliary link control information in the preset format is used to instruct the first electronic device to select the reference resource for the second electronic device, and the first auxiliary link control information further instructs the second electronic device to select the auxiliary link communication resource with reference to the reference resource. And if the first auxiliary link control information conforms to the preset format, the third electronic equipment adds other resources except the auxiliary link communication resource selected by the second electronic equipment in the reference resource to the candidate resource set. And if the first auxiliary link control information does not conform to the preset format, the third electronic equipment does not exclude the auxiliary link communication resource selected by the second electronic equipment from the reference resource, but excludes the reference resource from the candidate resource set of the third electronic equipment.
Fig. 3 is a schematic diagram of excluding secondary link communication resources in a secondary link communication method according to an embodiment of the present application. Referring to fig. 3, a first electronic device obtains a set of reference resources through sensing and the like, and indicates the reference resources to a second electronic device through first auxiliary link control information, where the reference resources are, for example, reference resources of at least one period, and each period includes at least two resources with the same time-frequency size. As shown in fig. 3, the reference resources of the first secondary link control information in at least two periods include 3 resources with the same time-frequency size, such as resource 1, resource 2, and resource 3 shown by a black dashed box in the figure. Each resource comprises a resource for transmitting a secondary link control channel and a resource for transmitting a secondary link data channel.
The first electronic device transmits the first auxiliary link control information on the resources used for transmitting the auxiliary link control channel, which are included in the resources 1 in the first reservation period, wherein the resources used for transmitting the auxiliary link control channel are shown as a grid filling part in the figure. The first auxiliary link control information carries indication information for indicating the reference resource, and the indication information comprises time domain information, frequency domain information and a reserved period of the reference resource. The time domain information includes time intervals, such as time interval 1 and time interval 2 in the figure, and is indicated by a first field in 3GPP, such as a secondary link control information (SCI-1-a) field, for characterizing a first phase of the secondary link control information.
The time slot of the resource 1 can be determined according to the first auxiliary link control information, and the frequency domain starting position of the resource 1 is the same as the frequency domain starting position for bearing the first auxiliary link control information resource. The frequency domain starting positions of resource 2 and resource 3, respectively, and the frequency domain lengths of resource 1, resource 2 and resource 3 are indicated by frequency domain information, for example, indicated by a first field in 3GPP for characterizing a first stage of the secondary link control information, such as a secondary link control information (SCI-1-a) field.
The reference resource in the second reservation period is a period repetition of the reference resource in the first reservation period, the period is indicated by reservation period information carried by the first auxiliary link control information, and the reservation period information is indicated by a first field, such as an auxiliary link control information (SCI-1-a) field, etc., used for representing the first stage of the auxiliary link control information in 3 GPP.
The first electronic device transmits the first secondary link control information on the resource for transmitting the secondary link control channel in the resource 1 in the first reservation period. The first auxiliary link control information is sensed by the third electronic device, and the third electronic device determines 6 reserved resources, that is, resource 1, resource 2 and resource 3 in the first reservation period and resource 4, resource 5 and resource 6 in the second reservation period in the graph, according to the first auxiliary link control information. And the third electronic equipment measures the DMRS of the auxiliary link control channel where the first auxiliary link control information is located, or measures the DMRS of the auxiliary link data channel indicated by the first auxiliary link control information, so as to obtain the RSRP. And if the RSRP is higher than a preset threshold, the third electronic equipment excludes the 6 resources from the candidate resource pool of the third electronic equipment. At this time, if the second electronic device does not use all of the 6 resources, the resources are wasted.
After receiving the first secondary link control information, the second electronic device finds that the first electronic device indicates a group of resources to itself, namely, resources 1 to 6. The second electronic device selects a part of the reference resources as the secondary link communication resources according to its own implementation, as shown by the diagonally filled parts in resource 2, resource 4, resource 5 and resource 6. The second electronic device performs secondary link communication on resource 2 at the earliest according to the data arrival.
For example, the second electronic device sends Transport Block (TB) 1 on resource 2 to the fourth electronic device. Meanwhile, the second electronic device sends second auxiliary link control information on the resource used for sending the auxiliary link control channel in the resource 2, where the second auxiliary link control information indicates the auxiliary link communication resource finally selected by the second electronic device, that is, the resource 2 and the resource 3 in the first reservation period and the resource 4 and the resource 5 in the second reservation period. The second auxiliary link control information sent on the resource for sending the auxiliary link control channel is shown in a vertical line filled part in the figure, and the auxiliary link communication resource finally selected by the third electronic device is shown in a diagonal line filled part in the figure. Wherein a secondary link communication resource of resources 3, 4 and 5 is used for retransmission of TB 1.
As another example, the second electronic device sends TB1 to the fourth electronic device on resource 2, and resource 3 is used to retransmit TB 1. The third electronic device transmits TB2 to the fourth electronic device on resource 4 within the second reservation period, the secondary link communication resource of resources 5 and 6 for retransmission of TB 2.
And the third electronic device receives the second auxiliary link control information on the resource 2 or the resource 3 in the first reservation period, and when the auxiliary link communication resource (such as a diagonally filled part in the figure) indicated by the second auxiliary link control information partially overlaps with the reference resource (such as a black dashed line frame in the figure) indicated by the first auxiliary link control information, the third electronic device lists the non-overlapping part, that is, the resource of the point-filled part in the resource 2, the resource 3, the resource 4, the resource 5 and the resource 6 in the figure, in its own candidate resource pool.
The following are embodiments of the apparatus of the present application that may be used to perform embodiments of the method of the present application. For details which are not disclosed in the embodiments of the apparatus of the present application, reference is made to the embodiments of the method of the present application.
Fig. 4 is a schematic structural diagram of a communication device according to an embodiment of the present application. The communication device 100 may be implemented in software and/or hardware. As shown in fig. 4, the communication apparatus 100 includes:
a receiving unit 11, configured to receive first auxiliary link control information from a first electronic device, where the first auxiliary link control information is used to indicate a reference resource, the reference resource is a resource selected by the first electronic device for a second electronic device, and the reference resource is a resource referred to when the second electronic device selects an auxiliary link communication resource;
the receiving unit 11 is further configured to receive second auxiliary link control information from the second electronic device, where the second auxiliary link control information is used to indicate an auxiliary link communication resource selected by the second electronic device from the reference resource;
a processing unit 12, configured to add other resources except the secondary link communication resource in the reference resource to a candidate resource set, and perform secondary link communication according to the candidate resource set.
In a feasible design, before the processing unit 12 adds other resources except the secondary link communication resource in the reference resource to the candidate resource set, the processing unit is further configured to obtain a secondary link reference signal received power, and determine whether the secondary link reference signal received power is greater than a preset threshold; and when the secondary link reference signal received power is greater than the preset threshold, excluding the reference resource from the candidate resource set.
In a feasible design, when the processing unit 12 obtains the reference signal received power of the secondary link, the processing unit is configured to measure a demodulation reference signal DMRS of a secondary link control channel to obtain the reference signal received power, where the secondary link control channel is a channel for carrying the first secondary link control information;
alternatively, the first and second electrodes may be,
when the processing unit 12 obtains the reference signal receiving power of the secondary link, the processing unit is configured to measure a demodulation reference signal DMRS of a secondary link data channel to obtain the reference signal receiving power, where the secondary link data channel is a data channel indicated by the first secondary link control information.
In a feasible design, when adding other resources except the secondary link communication resource in the reference resource to a candidate resource set, the processing unit 12 is configured to determine whether a first device identifier and a second device identifier are the same, and if the first device identifier and the second device identifier are the same, add other resources except the secondary link communication resource in the reference resource to the candidate resource set, where the first device identifier is an identifier of a second electronic device carried by the first secondary link control information, and the second device identifier is an identifier of a second electronic device carried by the second secondary link control information.
In a possible design, when the processing unit 12 adds other resources than the secondary link communication resource in the reference resource to the candidate resource set, it is configured to determine whether the first secondary link control information indicates that the second electronic device refers to the reference resource when selecting the secondary link communication resource; and when the first auxiliary link control information indicates that the second electronic equipment refers to the reference resource when selecting the auxiliary link communication resource, adding other resources except the auxiliary link communication resource in the reference resource to a candidate resource set.
In a feasible design, the reference resource is a periodic resource, each period includes at least two resources with the same time-frequency size, in a first period, the first auxiliary link control information is carried on a first block of resources in the first period, and the second auxiliary link control information is carried on other resources except the first block of resources in the first period.
In one possible design, the first secondary link control information further carries one or more of the following information: the time domain information of the reference resource, the frequency domain information of the reference resource, or the reservation period information of the reference resource.
The communication apparatus provided in the embodiment of the present application may perform the actions of the third electronic device in the above embodiments, and the implementation principle and the technical effect are similar, which are not described herein again.
Fig. 5 is a schematic structural diagram of an electronic device according to an embodiment of the present application. As shown in fig. 5, the electronic apparatus 200 includes:
a processor 21 and a memory 22;
the memory 22 stores computer-executable instructions;
the processor 21 executing the computer-executable instructions stored by the memory 22 causes the processor 21 to perform the secondary link communication method as performed by the first electronic device above; or cause the processor 21 to perform a secondary link communication method as performed by the second electronic device above.
For a specific implementation process of the processor 21, reference may be made to the above method embodiments, which implement similar principles and technical effects, and this embodiment is not described herein again.
Optionally, the electronic device 200 further comprises a communication component 23. The processor 21, the memory 22, and the communication unit 23 may be connected by a bus 24.
An embodiment of the present application further provides a readable storage medium, in which computer-executable instructions are stored, and when the computer-executable instructions are executed by a processor, the computer-executable instructions are used to implement the secondary link communication method executed by the third electronic device as above.
An embodiment of the present application further provides a computer program product, when the computer program product runs on a third electronic device, configured to enable the third electronic device to execute the above-mentioned secondary link communication method.
Those of ordinary skill in the art will understand that: all or a portion of the steps of implementing the above-described method embodiments may be performed by hardware associated with program instructions. The program may be stored in a computer-readable storage medium. When executed, the program performs steps comprising the method embodiments described above; and the aforementioned storage medium includes: various media that can store program codes, such as ROM, RAM, magnetic or optical disks.
Finally, it should be noted that: the above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present application.

Claims (16)

1. A secondary link communication method, comprising:
the third electronic device receives first auxiliary link control information from a first electronic device, wherein the first auxiliary link control information is used for indicating a reference resource, the reference resource is a resource selected by the first electronic device for a second electronic device, and the reference resource is a resource referred to by the second electronic device when the second electronic device selects an auxiliary link communication resource;
the third electronic device receives second auxiliary link control information from the second electronic device, where the second auxiliary link control information is used to indicate an auxiliary link communication resource selected by the second electronic device from the reference resource;
the third electronic device adding other resources of the reference resources except the secondary link communication resource to a candidate resource set;
the third electronic device uses resources in the candidate set of resources for secondary link communication.
2. The method of claim 1, wherein before the third electronic device adds other resources of the reference resources than the secondary link communication resources to the set of candidate resources, further comprising:
the third electronic equipment acquires the receiving power of the auxiliary link reference signal;
the third electronic equipment determines whether the auxiliary link reference signal receiving power is greater than a preset threshold;
when the secondary link reference signal received power is greater than the preset threshold, the third electronic device excludes the reference resource from the candidate resource set.
3. The method of claim 2, wherein the third electronic device obtaining the secondary link reference signal received power comprises:
the third electronic equipment measures a demodulation reference signal (DMRS) of an auxiliary link control channel to obtain the reference signal receiving power, wherein the auxiliary link control channel is a channel for bearing the first auxiliary link control information;
alternatively, the first and second electrodes may be,
and the third electronic equipment measures a demodulation reference signal (DMRS) of an auxiliary link data channel to obtain the reference signal receiving power, wherein the auxiliary link data channel is the data channel indicated by the first auxiliary link control information.
4. The method of any of claims 1-3, wherein the third electronic device adding other ones of the reference resources to the set of candidate resources than the secondary link communication resource comprises:
the third electronic device determines whether a first device identifier and a second device identifier are the same, where the first device identifier is an identifier of the second electronic device carried by the first auxiliary link control information, and the second device identifier is an identifier of the second electronic device carried by the second auxiliary link control information;
and if the first equipment identifier is the same as the second equipment identifier, adding other resources except the auxiliary link communication resource in the reference resource to a candidate resource set.
5. The method of any of claims 1-3, wherein the third electronic device adding other ones of the reference resources to the set of candidate resources than the secondary link communication resource comprises:
the third electronic device determining whether the first secondary link control information indicates that the second electronic device refers to the reference resource when selecting a secondary link communication resource;
if the first auxiliary link control information indicates that the second electronic device refers to the reference resource when selecting the auxiliary link communication resource, the third electronic device adds other resources except the auxiliary link communication resource in the reference resource to a candidate resource set.
6. The method according to any of claims 1-3, wherein the reference resource is a periodic resource, each period includes at least two resources with the same time-frequency size, and in the first period, the first secondary link control information is carried on the first block of resources in the first period, and the second secondary link control information is carried on other resources except the first block of resources in the first period.
7. The method according to any of claims 1-3, wherein the first secondary link control information further carries one or more of the following information: the time domain information of the reference resource, the frequency domain information of the reference resource, or the reservation period information of the reference resource.
8. A communications apparatus, comprising:
a receiving unit, configured to receive first auxiliary link control information from a first electronic device, where the first auxiliary link control information is used to indicate a reference resource, the reference resource is a resource selected by the first electronic device for a second electronic device, and the reference resource is a resource referred to when the second electronic device selects an auxiliary link communication resource;
the receiving unit is further configured to receive second secondary link control information from the second electronic device, where the second secondary link control information is used to indicate a secondary link communication resource selected by the second electronic device from the reference resource;
and the processing unit is used for adding other resources except the auxiliary link communication resource in the reference resource to a candidate resource set and carrying out auxiliary link communication according to the candidate resource set.
9. The apparatus of claim 8, wherein the processing unit is further configured to obtain a secondary link reference signal received power before adding other resources of the reference resources except the secondary link communication resource to the candidate resource set, and determine whether the secondary link reference signal received power is greater than a preset threshold; and when the secondary link reference signal received power is greater than the preset threshold, excluding the reference resource from the candidate resource set.
10. The apparatus of claim 9,
the processing unit is used for measuring a demodulation reference signal (DMRS) of an auxiliary link control channel when acquiring the receiving power of the auxiliary link reference signal to acquire the receiving power of the reference signal, wherein the auxiliary link control channel is a channel for bearing the first auxiliary link control information;
alternatively, the first and second electrodes may be,
and the processing unit is used for measuring a demodulation reference signal (DMRS) of an auxiliary link data channel when acquiring the reference signal receiving power of an auxiliary link, so as to obtain the reference signal receiving power, wherein the auxiliary link data channel is a data channel indicated by the first auxiliary link control information.
11. The apparatus according to any one of claims 8 to 10,
when adding other resources except the auxiliary link communication resource in the reference resource to a candidate resource set, the processing unit is configured to determine whether a first device identifier and a second device identifier are the same, and if the first device identifier and the second device identifier are the same, add other resources except the auxiliary link communication resource in the reference resource to the candidate resource set, where the first device identifier is an identifier of a second electronic device carried by the first auxiliary link control information, and the second device identifier is an identifier of a second electronic device carried by the second auxiliary link control information.
12. The apparatus according to any one of claims 8 to 10,
when the processing unit adds other resources except the auxiliary link communication resource in the reference resource to the candidate resource set, the processing unit is configured to determine whether the first auxiliary link control information indicates that the second electronic device refers to the reference resource when selecting the auxiliary link communication resource; and when the first auxiliary link control information indicates that the second electronic equipment refers to the reference resource when selecting the auxiliary link communication resource, adding other resources except the auxiliary link communication resource in the reference resource to a candidate resource set.
13. The apparatus according to any of claims 8-10, wherein the reference resource is a periodic resource, each period includes at least two resources with the same time-frequency size, and in a first period, the first secondary link control information is carried on a first block of resources in the first period, and the second secondary link control information is carried on other resources except the first block of resources in the first period.
14. The apparatus of any of claims 8-10, wherein the first secondary link control information further carries one or more of the following information: the time domain information of the reference resource, the frequency domain information of the reference resource, or the reservation period information of the reference resource.
15. An electronic device comprising a processor, a memory, and a computer program stored on the memory and executable on the processor, wherein execution of the program by the processor causes the electronic device to perform the method of any of claims 1-7.
16. A readable storage medium having stored therein instructions, which when run on an electronic device, cause the electronic device to perform the method of any one of claims 1-7.
CN202010761937.6A 2020-07-31 2020-07-31 Auxiliary link communication method and communication device Pending CN114071398A (en)

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