CN110445586A - Feedback resources determine method and device - Google Patents
Feedback resources determine method and device Download PDFInfo
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- CN110445586A CN110445586A CN201910750453.9A CN201910750453A CN110445586A CN 110445586 A CN110445586 A CN 110445586A CN 201910750453 A CN201910750453 A CN 201910750453A CN 110445586 A CN110445586 A CN 110445586A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
- H04L1/1607—Details of the supervisory signal
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
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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
- H04W4/06—Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services
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Abstract
The embodiment of the present invention provides a kind of feedback resources and determines method and device, first UE receives the multicast packet that the 2nd UE is sent by direct link, the targeted manner different from least one multicast member is determined from mode set, determines feedback resources using the targeted manner.During being somebody's turn to do, at least two members in multicast group determine feedback resources using different targeted manners, so that at least two Rx UE in multicast group determine different feedback resources, so that at least two Rx UE send feedback information using independent feedback resources, realize that each Rx UE in multicast group determines the purpose of independent PSFCH resource.
Description
Technical field
The present embodiments relate to fields of communication technology more particularly to a kind of feedback resources to determine method and device.
Background technique
In the 12nd version (Release 12, Rel-12), long term evolution (Long Term Evolution, LTE) is introduced
Neighbouring business (Proximity-based Services, ProSe), so that multiple user equipmenies (User Equipment,
UE it can pass through PC5 interface direct communication between).Based on direct communication, third generation partner program (3rd Generation
Partnership Project, 3GPP) PC5 interface is used for vehicle to all things on earth (Vehicle-to-Everything, V2X)
In all things on earth interconnection.
In V2X communication, a transmitting terminal UE (Transmitter UE, Tx UE) is to multiple receiving end UE (Receiver
UE, Rx UE) mode that sends same data is referred to as multicast (groupcast), and the member of a multicast group includes a Tx
UE and multiple Rx UE.In multicast procedures, same group of different UE can undertake the role of Tx UE.For groupcast,
After 3GPP proposes that the Rx UE in multicast group receives data, affirmative acknowledgement is fed back to Tx UE according to data receiving state
(acknowledge, ACK) or negative response (non-acknowledge, NACK).A kind of feedback system is each Rx UE in group
Using identical feedback resources, the hereinafter referred to as unilateral link feedback channel of physics (Physical Sidelink Feedback
Channel, PSFCH) for resource to Tx UE transmission feedback information, this kind of mode is also referred to as option 1 (Option 1);It is another
Feedback system is that independent feedback resources are respectively adopted to Tx UE transmission feedback information in each Rx UE in group, this kind of mode is also referred to as
Be option 2 (Option 2), PSFCH can also be referred to as physics direct link feedback channel.
However, Option 2 is directed to, when Tx UE determines that each Rx UE in multicast group is fed back using independent PSFCH resource
When, there is no the methods how each Rx UE proposed in multicast group determines respective PSFCH resource for industry.Therefore, in multicast group
Each Rx UE how to determine respective PSFCH resource so that network distribution PSFCH resource it is more compact and efficient, actually urgently
It solves the problems, such as.
Summary of the invention
The embodiment of the present invention provides a kind of feedback resources and determines method and device, and each Rx UE in multicast group is determined solely
Vertical PSFCH resource realizes the more compact and efficient purpose of PSFCH resource of network distribution.
In a first aspect, the embodiment of the present invention, which provides a kind of feedback resources, determines method, comprising:
First user equipment (UE) receives the multicast packet that the 2nd UE is transmitted by direct link, and the direct link is described
The link communicated between first UE and the 2nd UE by PC5 interface;
First UE determines that targeted manner, the different modes in the mode set indicate different from mode set
At least one UE in feedback resources method of determination, the targeted manner and multicast group in addition to the first UE and the 2nd UE
Determine that the mode of feedback resources is different;
First UE determines that feedback resources, the feedback resources are that the first UE is used for according to the targeted manner
The resource of feedback information is sent to the 2nd UE.
In a kind of feasible design, the first UE determines targeted manner from mode set, comprising:
First UE is identified in the group in the multicast group according to the first UE, is determined from the mode set
The targeted manner.
In a kind of feasible design, the first UE is identified in the group in the multicast group according to the first UE, from
The targeted manner is determined in the mode set, comprising:
First UE determines whether the first UE is special UE according to identifying in described group, and the special UE includes
The group member of predeterminated position in 2nd UE specified group member or first queue, the first queue is to described group
Broadcast what other UE in group in addition to the 2nd UE were ranked up;
If the first UE is the special UE, the first UE determines that the targeted manner is in the mode set
First method;
Wherein, under the first method, when the index of the feedback resources transmits the multicast packet by the 2nd UE
The index of the PSSCH subchannel of use and the first reference parameter determine that first reference parameter is the initial of PSFCH resource
Value.
In a kind of feasible design, above-mentioned method further include:
First UE determines first reference parameter by any one mode in following manner:
First UE receives the instruction information that network side equipment is sent, and the instruction information is used to indicate first ginseng
Examine parameter;
Alternatively,
First UE receives the instruction information that the 2nd UE is sent by the direct link, and the instruction information is used
In instruction first reference parameter;
Alternatively,
First UE determines first ginseng by preset transformational relation according to the frequency domain position of the PSSCH resource
Examine parameter;
Alternatively,
First reference parameter described in the gain of parameter that first UE is pre-configured by network side equipment.
In a kind of feasible design, above-mentioned method further include:
If the first UE is not the special UE, the first UE determines that the targeted manner is the mode set
In second method, any one mode in Third Way or fourth way;
The feedback resources of other UE, which are formed, under the second method, in the feedback resources and second queue of the first UE connects
Continuous resource;
Under the Third Way, the feedback resources etc. of other UE in the feedback resources of the first UE and the second queue
It is spaced apart;
Under the fourth way, the feedback resources of the feedback resources and other UE in the second queue of the first UE are non-
It is spacedly distributed;
Wherein, the second queue is to reject the special UE from the first queue to obtain.
In a kind of feasible design, the first UE determines feedback resources according to the targeted manner, comprising:
Under the second method, position of the first UE according to the first UE in the second queue determines institute
State the feedback resources of the first UE.
In a kind of feasible design, the first UE determines feedback resources according to the targeted manner, comprising:
Under the Third Way, the first UE is according to the first UE in the position in the second queue and between presetting
Every determining the feedback resources of the first UE.
In a kind of feasible design, the first UE determines feedback resources according to the targeted manner, comprising:
Under the fourth way, the first UE is provided according to position of the first UE in the second queue with feedback
Source set determines the feedback resources of the first UE, and the position is position of the first UE in the second queue,
The feedback resources set includes L feedback resources, and the feedback resources set is anti-except being determined according to the first method
Present the feedback resources set except resource.
In a kind of feasible design, the first UE determines feedback resources according to the targeted manner, comprising:
First UE determines that physics direct link feedback channel PSFCH period, the PSFCH period are used to indicate one
The PSSCH timeslot number that PSFCH on time slot can be fed back;
First UE determines the feedback resources according to the PSFCH period and the targeted manner.
In a kind of feasible design, the PSFCH period is greater than or equal to 1 and is integer.
Second aspect, a kind of feedback resources determining device of the embodiment of the present invention, comprising:
Transmit-Receive Unit, the multicast packet transmitted for receiving the 2nd UE by direct link, the direct link is described
The link communicated between first UE and the 2nd UE by PC5 interface;
Processing unit, for determining targeted manner from mode set, the different modes instruction in the mode set is not
Interior at least one in addition to the first UE and the 2nd UE of same feedback resources method of determination, the targeted manner and multicast group
A UE determines that the mode of feedback resources is different, according to the targeted manner, determines feedback resources, and the feedback resources are described the
One UE is used to send the resource of feedback information to the 2nd UE.
In a kind of feasible design, the processing unit, for according to the first UE in the group in the multicast group
Mark determines the targeted manner from the mode set.
In a kind of feasible design, the processing unit, for whether determining the first UE according to identifying in described group
For special UE, the special UE include in the specified group member of the 2nd UE or first queue in the group of predeterminated position at
Member, the first queue is ranked up to other UE in the multicast group in addition to the 2nd UE;If described
One UE is the special UE, it is determined that the targeted manner is the first method in the mode set;Wherein, the first party
Under formula, the index for the PSSCH subchannel that the index of the feedback resources uses when transmitting the multicast packet by the 2nd UE
Determine that first reference parameter is the initial value of PSFCH resource with the first reference parameter.
In a kind of feasible design, the Transmit-Receive Unit is also used to receive the instruction information of network side equipment transmission, described
Instruction information is used to indicate first reference parameter;Alternatively, the Transmit-Receive Unit, is also used to receive the 2nd UE and passes through institute
The instruction information of direct link transmission is stated, the instruction information is used to indicate first reference parameter;Alternatively, the processing is single
Member is also used to determine first reference parameter by preset transformational relation according to the frequency domain position of the PSSCH resource;Or
Person, the processing unit are also used to the first reference parameter described in the gain of parameter by network side equipment pre-configuration.
In a kind of feasible design, the processing unit, if being also used to the first UE is not the special UE, it is determined that
The targeted manner is any one mode in second method, Third Way or fourth way in the mode set;
The feedback resources of other UE, which are formed, under the second method, in the feedback resources and second queue of the first UE connects
Continuous resource;
Under the Third Way, the feedback resources etc. of other UE in the feedback resources of the first UE and the second queue
It is spaced apart;
Under the fourth way, the feedback resources of the feedback resources and other UE in the second queue of the first UE are non-
It is spacedly distributed;
Wherein, the second queue is to reject the special UE from the first queue to obtain.
In a kind of feasible design, the processing unit, under the second method, according to the first UE described
Position in second queue determines the feedback resources of the first UE.
In a kind of feasible design, the processing unit, under the Third Way, according to the first UE described
Position and preset interval in second queue determine the feedback resources of the first UE.
In a kind of feasible design, the processing unit, under the fourth way, according to the first UE described
Position and feedback resources set in second queue, determine the feedback resources of the first UE, and the position is described first
Position of the UE in the second queue, the feedback resources set include L feedback resources, and the feedback resources set is to remove
Feedback resources set except the feedback resources determined according to the first method.
In a kind of feasible design, the processing unit, for determining the physics direct link feedback channel PSFCH period,
The PSSCH timeslot number that the PSFCH that the PSFCH period is used to indicate on a time slot can be fed back, according to the PSFCH period
The feedback resources are determined with the targeted manner.
In a kind of feasible design, the PSFCH period is greater than or equal to 1 and is integer.
The third aspect, the embodiment of the present invention provide a kind of user equipment, including processor, memory and are stored in described deposit
On reservoir and the computer program that can run on a processor, the processor realize first aspect as above when executing described program
Or the method in the various possible implementations of first aspect.
Fourth aspect, the embodiment of the present application provide a kind of computer program product comprising instruction, when it is in user equipment
When upper operation, so that user equipment computer executes in the various possible implementations of above-mentioned first aspect or first aspect
Method.
5th aspect, the embodiment of the present application provides a kind of storage medium, instruction is stored in the storage medium, when its
When being run on user equipment, so that user equipment executes the various possible implementations such as above-mentioned first aspect or first aspect
In method.
Feedback resources provided in an embodiment of the present invention determine method and device, and the first UE receives the 2nd UE and passes through direct link
The multicast packet of transmission determines the targeted manner different from least one multicast member from mode set, utilizes the target
Mode determines feedback resources.During being somebody's turn to do, at least two members in multicast group determine feedback money using different targeted manners
Source, so that at least two Rx UE in multicast group determine different feedback resources, so that at least two Rx UE
Feedback information is sent using independent feedback resources, realizes that each Rx UE in multicast group determines the mesh of independent PSFCH resource
's.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is this hair
Bright some embodiments for those of ordinary skill in the art without any creative labor, can be with
It obtains other drawings based on these drawings.
Figure 1A is a kind of network architecture schematic diagram that feedback resources provided in an embodiment of the present invention determine that method is applicable in;
Figure 1B is another network architecture schematic diagram that feedback resources provided in an embodiment of the present invention determine that method is applicable in;
Fig. 2 is the flow chart that a kind of feedback resources provided in an embodiment of the present invention determine method;
Fig. 3 is the flow chart that another feedback resources provided in an embodiment of the present invention determine method
Fig. 4 is the schematic diagram that feedback resources provided in an embodiment of the present invention determine the feedback resources of special UE in method;
Fig. 5 is the schematic diagram that feedback resources provided in an embodiment of the present invention determine the feedback resources of Continuous Mappings in method;
Fig. 6 is the schematic diagram for the feedback resources that feedback resources provided in an embodiment of the present invention determine the mapping that interweaves in method;
Fig. 7 is the schematic diagram that feedback resources provided in an embodiment of the present invention determine the PSFCH period in method;
Fig. 8 is a kind of structural schematic diagram of feedback resources determining device provided in an embodiment of the present invention;
Fig. 9 is a kind of structural schematic diagram of user equipment provided in an embodiment of the present invention.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art
Every other embodiment obtained without creative efforts, shall fall within the protection scope of the present invention.
In direct communication technology, two UE carry out direct communication (Direct by the direct link of PC5 interface
Communication), direct communication can also be referred to as unilateral link communication (Sidelink Communication), this two
In a UE, the UE for sending data is referred to as transmitting terminal (Transmitter, Tx) UE, the UE for receiving data and is referred to as receiving end
(Receiver, Rx) UE.During direct communication, there are two types of the resource distribution mode of mode, first way is scheduling resource
(the scheduled resource allocation) mode of distribution, in this kind of mode, Tx UE is in wireless heterogeneous networks
(Radio Resource Control, RRC) connected state is provided by base station by the transmission that dedicated signaling is configured to direct communication
Source;Another way is automatic resource selection mode (autonomous resource allocation) mode, this kind of mode
In, base station can be that UE is preparatory by system message or wireless heterogeneous networks (Radio Resource Control, RRC) signaling
Configuration or the transfer resource pond for being configured to direct communication in real time, Tx UE may be at free position, such as RRC connected state, RRC
Idle state or the inactive state of RRC, Tx UE select the resource for direct communication from resource pool.When Tx UE is in the network coverage
Within the scope of when, Tx UE can obtain resource using above-mentioned first way or obtain money using the above-mentioned second way
Source;When except Tx UE being in network coverage, Tx UE obtains resource using the above-mentioned second way, i.e. Tx UE is adopted
The resource for direct communication is selected from preconfigured resource pool with the mode that automatically selects.Wherein, Tx UE is covered in network
Except lid range, referring to Tx UE, detection is less than cell in the frequency for carrying out direct communication business, alternatively, that is detected is small
Area's signal strength is lower than the scene of pre-determined threshold, and direct communication business is, for example, V2X etc..
5th third-generation mobile communication (fifth-generation, 5G) system is capable of providing bigger bandwidth, more low time delay etc., Tx
UE can be using unicast (unicast) or multicast (groupcast) or broadcast transmission data.When Tx UE uses multicast side
When formula, feedback mechanism can be introduced.Based on feedback mechanism, when Tx UE determines that Rx UE needs to feed back, Rx UE it needs to be determined that closing
Suitable feedback resources, hereinafter referred to as PSFCH resource just can be carried out feedback.In general, feedback system includes two kinds of options:
Each Rx UE in 1, multicast group of Option uses identical feedback resources;Each Rx in 2, multicast groups of Option
UE is respectively adopted independent feedback resources and sends feedback information to Tx UE.
In general, network side equipment it is associated can to configure the transfer resource pond while configuring transfer resource pond
Feedback resources pond.It is sent out when Tx UE can be determined according to the parameter etc. that QoS parameter, the network side equipment of multicast service configure
It rises and needs group sowing time for feeding back, if Tx UE obtains resource using automatic resource selection mode, since a transfer resource pond can be with
It is shared by the UE of development unicast and developing multicast, therefore, Tx UE can be made based on random selection, perception (sensing) other UE
Oneself available transfer resource is selected with the situation etc. of resource pool.Wherein, when being based on perceptive mode, reasonable sensing machine
System can make different transmission UE select different transfer resources, so that Rx UE is true according to different transfer resources
Make with the associated feedback resources of the transfer resource, and using the feedback resources to Tx UE send feedback information.
In perception, Tx UE sets the time window of selection transfer resource first, and sets the letter of selection transfer resource
Number thresholding, according to this signalc threshold, Tx UE filters out available transfer resource from transfer resource pond, and the process of screening can be with
It is: first, it is specified that the set SA and SB of two storage transfer resources, SA are initialized as the resource complete or collected works in transfer resource pond, SB
It is initialized as empty set.Tx UE can screen out limited transfer resource from SA, then screen out again more than signalc threshold
Transfer resource, remaining transfer resource obtain the transfer resource for meeting transmission demand after screening.Due to what is obtained after screening
Transfer resource quantity may be very few, cannot achieve direct communication.Therefore, a corresponding threshold value can be set, after screening
When the transfer resource arrived is less than this threshold value (such as threshold value of setting 20%), amplified signal thresholding (as increased 3dB) appropriate, then
Screening is re-started according to above-mentioned process, the quantity until screening obtained transfer resource is greater than corresponding threshold value.At this point, can
With will transfer resource in obtained set A after screening, selection wherein received signal strength indicator (Reference Signal
Receiving Power, RSRP) small resource is put into set SB.Later, Tx UE can select the biography needed from SB
Defeated resource.
Base station is in the associated feedback resources of configuration transfer resource, it is contemplated that the processing delay etc. of Rx UE, it usually will transmission
Resource and feedback resources are configured to discontinuous resource.For example, transfer resource is located at time slot n, feedback resources are located at time slot (n+
K), then the V2X data that Rx UE receives Tx UE transmission in time slot n, need certain processing time to solve the V2X data
Code, to judge whether to be properly received the data, if being properly received the data, some time slot after time slot n, such as time slot
(n+k) PSFCH feeding back ACK is utilized on;If Rx UE is not properly received data, fed back on time slot (n+k) using PSFCH
NACK.The value of k depends on the minimal time delay etc. of Rx UE processing data.
For Option2, when Tx UE determine all members in group using independent feedback resources i.e. PSFCH resource into
It when row feedback, on the one hand needs to make full use of feedback resources pond, on the other hand, needs the feedback resources of each member in multicast not
Conflict.At this point, how each member in multicast group determines respective feedback resources, industry does not propose suitable solution party
Case.
In view of this, the embodiment of the present invention, which provides a kind of feedback resources, determines method and device, for difference Rx in multicast
UE uses the scene fed back of different feedback resources, and the special UE and no special UE in multicast group are determined in different ways
Feedback resources realize that each Rx UE in multicast group determines the purpose of independent PSFCH resource.
Firstly, to the present embodiments relate to title explain.
First UE can also be referred to as receiving end (Receiver, Rx) UE, for by between the first UE and the 2nd UE
Direct link receives the data of the 2nd UE multicast, it is determined whether and data are properly received, and determine feedback resources, it is then anti-using this
It presents resource and sends feedback information to the 2nd UE, to indicate whether to be properly received multicast packet to the 2nd UE.
2nd UE can also be referred to as transmitting terminal (Transmitter, Tx) UE, for by the first UE and the 2nd UE it
Between direct link to the first UE send data, and by the direct link receive the first UE send feedback information.
Feedback resources, i.e. PSFCH resource are the resources that Rx UE is used to send feedback information.
It should be noted that the first UE and the 2nd UE are opposite, and nisi in the embodiment of the present invention.For example,
UE1 is transmitting terminal UE, UE2 when being receiving end UE, and the first UE is UE2, and the 2nd UE is UE1;It is hair when UE1 is receiving end UE, UE2
When sending end UE, the first UE is UE1, the 2nd UE is UE2.
Secondly, determining that the network architecture of method is illustrated to feedback resources provided in an embodiment of the present invention.Example
Property, reference can be made to Figure 1A and Figure 1B.
Figure 1A is a kind of network architecture schematic diagram that feedback resources provided in an embodiment of the present invention determine that method is applicable in.Please
A referring to Fig.1, the network architecture are the architectures of communication networks of device-to-device (device to device, D2D), the network rack
At least there is a multicast group in structure, which includes 3 UE, respectively UE1, UE2 and UE3, wherein UE1 and UE2 are in
Within base station range, UE3 is in except base station range, UE1 as Tx UE, UE2 and UE3 as Rx UE, UE1 and
Direct link is established between UE2, direct link is established between UE1 and UE3, and UE1 sends data to UE2 and UE3 simultaneously.UE2 and
UE3 determines respective targeted manner from mode set respectively and determines respective feedback resources, and later, UE2 and UE3 are used
Different feedback resources send feedback information to UE1.Based on the network architecture, the first UE can be UE2 and UE3, and the 2nd UE can
Think UE1.
Figure 1B is another network architecture schematic diagram that feedback resources provided in an embodiment of the present invention determine that method is applicable in.
Figure 1B is please referred to, which is the architectures of communication networks of V2X.V2X be vehicle and vehicle (vehicle to vehicle,
V2V the communication between communication, vehicle and roadside infrastructure (vehicle to infrastructure, V2I) between), vehicle
Between pedestrian (vehicle to pedestrian, V2P) communication, vehicle and network (vehicle to network,
V2N the general name of the communication between) etc..At least there is a multicast group in the network architecture, which includes 5 UE, respectively
For UEa, UEb, UEc, UEd and UEe, wherein UEa and UEb is arranged on vehicle, is vehicle-mounted user equipment, UEc is, for example, roadside
Unit etc., UE d are the mobile phone etc. of pedestrian, and UE e is the server etc. in V2X.UEa, UEb and UEc are in base station range
Within, UEd and UEe are in except base station range.UEa as Tx UE, other UE as Rx UE, UEa and each Rx UE it
Between establish direct link.UE in UEb~UEe determines respective targeted manner from mode set respectively and determination is respective
Feedback resources, later, UEb~UEe send feedback information to UEa using different feedback resources.Based on the network architecture, first
UE can be any one in UEb~UEe, and the 2nd UE can be UEa.
It should be noted that, although above-mentioned Figure 1A and Figure 1B be in network coverage with Tx UE, Rx UE is in
The embodiment of the present invention is described in detail in or beyond network coverage, however, the embodiment of the present invention is not with this
For limitation, in other feasible implementations, it is also possible to Tx UE and Rx UE and is respectively positioned on outside network coverage;Alternatively,
It is also possible to Tx UE to be in outside network coverage, part Rx UE or whole Rx UE are in network coverage.
In addition, it should also be noted that, between the UE of developing multicast, Tx UE and Rx UE know in the embodiment of the present invention
Multicast group belonging to road oneself, it is known that identified in the mark of multicast group and oneself group in multicast group, Rx UE is from reception
V2X data in can be parsed out multicast group identification information so that can decide whether to receive the data of the multicast group.UE can
With when accessing network, the multicast group belonging to oneself is known from network side equipment, alternatively, can be shifted to an earlier date by network operator for UE
The composition of multicast group is set, for example, network operator passes through user identification module (Subscriber Identification
Module, SIM) block multicast group belonging to setting UE.The embodiment of the present invention does not limit the composition and multicast group information of multicast group
Advice method.In the embodiment of the present invention, if specified otherwise, default the first UE and the 2nd UE do not belong to same multicast group.The
One UE and the 2nd UE can belong to different multicast groups, and if multicast group 1 has 5 members, which includes the first UE and second
UE;Multicast group 2 has 10 members, which includes the first UE and the 2nd UE.
In the following, based on the network architecture shown in above-mentioned explanation of nouns and Figure 1A and Figure 1B, described in the embodiment of the present invention
Feedback resources determine that method is described in detail.Illustratively, reference can be made to Fig. 2.Fig. 2 is one kind provided in an embodiment of the present invention
Feedback resources determine that the flow chart of method, the present embodiment include:
101, the 2nd UE sends multicast packet to the first UE by direct link.
Correspondingly, the first UE receives the multicast packet by direct link.
Wherein, the direct link of PC5 interface of the direct link between the first UE and the 2nd UE.
102, the first UE determines targeted manner from mode set.
Wherein, the different modes in the mode set indicate different feedback resources methods of determination, the targeted manner
Determine that the mode of feedback resources is different from least one UE in multicast group in addition to the first UE and the 2nd UE.
Illustratively, in each Rx UE in multicast group, at least there are two the targeted manners that Rx UE determines feedback resources
Difference so that at least two Rx UE determine different feedback resources so that at least two Rx UE use it is independent anti-
It presents resource and sends feedback information.For example, please referring to Figure 1A, the first UE can determine feedback resources for UE2 or UE3, UE2 and UE3
Targeted manner it is different;For another example, Figure 1B is please referred to, in UEb~UEe, each UE determines anti-using respective targeted manner
Resource is presented, the targeted manner of these UE is not exactly the same, and if UEb uses a kind of targeted manner, other UE are using another target
Mode.
103, the first UE determines feedback resources according to the targeted manner.
Wherein, the feedback resources are the resource that the first UE is used to send feedback information to the 2nd UE.
After determining targeted manner, the first UE determines the feedback resources for being used for feedback information according to the targeted manner.
Feedback resources provided in an embodiment of the present invention determine method, and the first UE receives what the 2nd UE was sent by direct link
Multicast packet determines the targeted manner different from least one multicast member from mode set, true using the targeted manner
Determine feedback resources.During being somebody's turn to do, at least two members in multicast group determine feedback resources using different targeted manners, thus
So that at least two Rx UE in multicast group determine different feedback resources, so that at least two Rx UE are used independently
Feedback resources send feedback information, realize that each Rx UE in multicast group determines the purpose of independent PSFCH resource.
In the following, how from mode set to determine that targeted manner is described in detail to the first UE.
In a kind of feasible design, when the first UE determines targeted manner from mode set, the first UE determines that physics is direct
It in the link feedback channel PSFCH period, is identified in the group in multicast group according to the first UE and the PSFCH period, from mode set
Determine targeted manner.Wherein, the PSSCH timeslot number that the PSFCH that the PSFCH period is used to indicate on a time slot can be fed back.
When illustratively, within the coverage area that the 2nd UE is in network side equipment, the system message of network side equipment
Or the parameter of direct communication is configured in dedicated signaling, including developing multicast, unicast shared transfer resource pond and this is total
Enjoy the corresponding feedback resources pond in transfer resource pond.Wherein, transfer resource pond can be according to period assignment, such as week of 5 milliseconds (ms)
In phase, transfer resource pond is located at the 2nd time slot, and feedback resources pond be located at the 3rd time slot most latter two symbol or last
A symbol.At this point, the relationship that the time slot of PSSCH and the number of time slots mapping relations of PSFCH are 1 pair 1, i.e. PSFCH period are 1
Time slot, that is to say, that after the first UE receives the PSSCH on a time slot, need to be carried out instead with the PSFCH on a time slot
Feedback.Frequency domain position, the quantity in transfer resource pond etc. are configured by system message or dedicated signaling, the frequency domain position in feedback resources pond,
Quantity etc. is also arranged by system message or dedicated signaling.
Wherein, the transfer resource in transfer resource pond can be PSSCH subchannel etc., and a PSSCH subchannel can be
Multiple Physical Resource Block, particular number can be arranged by system message or dedicated signaling.2nd UE transmits single-side chain on PSCCH
Road controls information (sidelink control information, SCI), and SCI is also referred to as direct link control information.
SCI indicates the parameters such as position (i.e. the time-frequency location of PSSCH used in V2X data), modulation and the coded format of PSSCH, the
Two UE are in PSSCH subchannel transmitting data;After first UE receives SCI, data are received from PSSCH subchannel.Assuming that PSSCH
The quantity of subchannel is M, i.e., the quantity of transfer resource is M.In multicast procedures, each of the M PSSCH subchannel
PSSCH subchannel can be by the 2nd UE for sending multicast packet, and multiple first UE receive the group in the PSSCH subchannel
Multicast data, multiple first UE herein refer to the UE for belonging to the same multicast group.
In the embodiment of the present invention, the PSFCH period can be 1 time slot, 2 time slots, 4 time slots etc., be when the PSFCH period
When 1, the PSSCH on a time slot needs PSFCH over a slot to be fed back.That is, the 2nd UE is one
Multicast packet is sent to multiple first UE in PSSCH subchannel on a time slot, then each Rx UE needs after the time slot
A corresponding time slot using oneself feedback resources to the 2nd UE send feedback information.
It is N when the PSFCH period, and when N is greater than 1, the PSSCH on N number of time slot needs PSFCH over a slot to carry out
Feedback.That is, multiple 2nd UE are when sending respective multicast packet in the PSSCH subchannel on N number of time slot, each
Rx UE needs feed back the PSSCH subchannel on N number of time slot in the PSFCH on the same time slot.Where PSFCH
Time slot is located at after the time slot where PSSCH, the last one time slot of time slot where time slot where PSFCH and this N number of PSSCH
Interval depends on the minimum treat time delay of Rx UE, and the present invention is not especially limited this.
According to above-mentioned: under the different PSFCH periods, the first UE determines the position difference or PSFCH of feedback resources
The index of resource is different.Mark is different in the groups of different members in one multicast group, and each first UE in multicast group can be with
Respective feedback resources are determined according to mark in group and PSFCH period.
In the embodiment of the present invention, the UE in multicast group is other than Tx UE, other UE are segmented into two classes: the first kind is spy
Different UE, the second class are no special UE.Wherein, special UE includes presetting in the specified group member of the 2nd UE or first queue
The group member of position, the first queue are ranked up to other UE in multicast group in addition to the 2nd UE.In the following, right
How special UE and no special UE determines that feedback resources are described in detail respectively.Illustratively, reference can be made to Fig. 3.
Fig. 3 is the flow chart that another feedback resources provided in an embodiment of the present invention determine method.The present embodiment includes:
201, the 2nd UE sends multicast packet to the first UE by direct link.
Correspondingly, the first UE is by being directly connected to receive the multicast packet.
Wherein, the direct link of PC5 interface of the direct link between the first UE and the 2nd UE.
202, the first UE determines the physics direct link feedback channel PSFCH period.
Wherein, the PSSCH timeslot number that the PSFCH that the PSFCH period is used to indicate on a time slot can be fed back.
203, the first UE determines whether the first UE is special UE according to identifying in described group, if the first UE is special
UE thens follow the steps 204;If the first UE is not special UE, 205 are thened follow the steps.
Illustratively, special UE include in the specified group member of the 2nd UE or first queue in the group of predeterminated position at
Member.Whether the first UE judges itself when being special UE, judges itself whether be the specified UE of the 2nd UE or itself whether be first
The UE of specific position in queue, such as the first UE whether be first queue first UE.Wherein, first queue is removed in multicast group
What other UE outside the 2nd UE were ranked up, when sequence, can identify in the group according to each UE sequence from small to large or
The sequence such as sequence from big to small.First queue is the set of other UE after removing the 2nd UE in multicast group.
204, the first UE determines that targeted manner is first method.
Wherein, under the first method, when the index of the feedback resources transmits the multicast packet by the 2nd UE
The index of the PSSCH subchannel of use and the first reference parameter determine that first reference parameter is the initial of PSFCH resource
Value.
Illustratively, it is assumed that the quantity of transfer resource is M, transfer resource PSSCH in transfer resource pond in a time slot
Subchannel, in multicast procedures, each of M PSSCH subchannel PSSCH subchannel is by the 2nd UE for sending group
Multicast data, multiple first UE receive the multicast packet in the PSSCH subchannel.When the PSFCH period is 1 time slot, the 2nd UE
PSSCH subchannel on time slot n sends multicast packet, and receives the feedback information that each first UE is sent on time slot (n+k).
When the first UE is special UE, the first UE can pass through the rope of the PSSCH subchannel used when the 2nd UE multicast data transmission
Draw the index of determining feedback resources.For example, following formula (1), which can be used, determines feedback resources:
The index of feedback resources=the first reference parameter+PSSCH sub-channel index (1)
Wherein, the first reference parameter (PSFCH reference) is the initial value of PSFCH resource, and the first reference parameter can
To be indicated from the 2nd UE to the first UE;Alternatively, can be arranged by network side equipment by system message or dedicated signaling;Alternatively,
It can be determined according to the frequency domain position of PSSCH resource by preset transformational relation by the first UE;Alternatively, the first UE is by prewired
The parameter set knows the first reference parameter.First reference parameter can be 0 etc..
According to above-mentioned: each first UE can be determined according to the index etc. of PSSCH subchannel received by oneself
Feedback resources.Illustratively, reference can be made to Fig. 4, Fig. 4 are that feedback resources provided in an embodiment of the present invention determine special UE in method
The schematic diagram of feedback resources.If the 2nd UE sends multicast packet to the first UE using multiple PSSCH subchannels, utilize
When determining the feedback resources of the first UE in above-mentioned formula (1), using the minimum value of this multiple PSSCH sub-channel index as PSSCH
Sub-channel index.
Referring to figure 4., it is assumed that the 2nd different UE adhere to multicast group 1, multicast group 2 and multicast group 3 separately, those the 2nd UE difference
Multicast is sent to multicast group 1, multicast group 2 and multicast group 3 in PSSCH subchannel 0, PSSCH subchannel 1, PSSCH subchannel 2
Data, then the feedback resources where the corresponding PSFCH0 of special UE in multicast group 1 can be determined according to PSSCH subchannel 0,
Feedback resources 1 where the corresponding PSFCH1 of special UE in multicast group 2 can determine according to PSSCH subchannel 1, multicast group 3
Feedback resources 2 where the corresponding PSFCH2 of interior special UE can be determined according to PSSCH subchannel 2.
It should be noted that only illustrated in Fig. 4 multicast group 1, in multicast group 2 and multicast group 3 special UE feedback
Resource, do not illustrate multicast group 1, in multicast group 2 and multicast group 3 no special UE feedback resources.
In addition, it should also be noted that, special UE determines feedback resources mode in multicast group, with this in above-described embodiment
Determine that the mode of feedback resources is identical when special UE is as reception UE during unicast.In this way, work as transfer resource pond quilt
Unicast and multicast it is shared in use, can overall compact configuration feedback resources, avoid the wasting of resources.
205, the first UE determines that the targeted manner is second method, Third Way or the four directions in the mode set
Any one mode in formula.
Illustratively, if the first UE is not special UE, the first UE randomly chooses second method, Third Way, four directions
Any one mode in formula is as targeted manner;Alternatively, the first UE can preset a kind of mode as determining feedback resources
Targeted manner determines feedback resources using the predetermined manner, the predetermined manner when it is special UE that the first UE, which identifies itself not,
It can be second method, Third Way, any one mode or other modes in fourth way, the embodiment of the present invention is simultaneously unlimited
System.
In the following, above-mentioned second method, Third Way and fourth way are described in detail respectively.
Firstly, second method.
Illustratively, second method can also be referred to as Continuous Mappings mode.Under second method, the feedback resources of the first UE
Continuous resource is formed with the feedback resources of other UE in first queue.That is, in addition to special UE and the 2nd UE in multicast group
Outside, the feedback resources of other UE are mapped to continuous feedback resources.For simplicity, its by first queue in addition to special UE
The queue that his UE is constituted, referred to as second queue.
Assuming that the 2nd UE uses 0 multicast data transmission of PSSCH subchannel, each Rx UE in multicast group is using independent anti-
Feedback resource is fed back, then for the special UE in multicast group, can determine feedback resources using above-mentioned formula (1), and
For other UE in multicast group, then it needs to be determined that other feedback resources.For example, can be determined by following formula (2) instead
Present resource:
The index of the feedback resources of first UE=second position in second queue the+the one UE of reference parameter index -1
(2)
Wherein, the second reference parameter is the bias of PSFCH resource, and the second reference parameter can be from the 2nd UE to the first UE
Instruction;Alternatively, can be arranged by network side equipment by system message or dedicated signaling;Alternatively, can be by the first UE foundation
The frequency domain position of PSSCH resource is determined by preset transformational relation;Alternatively, the first UE knows second by the parameter being pre-configured
Reference parameter;Alternatively, the second reference parameter can be according to initial value (i.e. the first reference parameter), a time slot for PSFCH resource
The sub-channel index that PSSCH number of subchannels and the 2nd UE send that multicast packet uses in interior PSSCH determines.Wherein, second queue
It is that according to mark in group, sequence is carried out from big to small or from small to large etc. by other UE after rejecting special UE in first queue
What sequence obtained.
Illustratively, reference can be made to Fig. 5, Fig. 5 are that feedback resources provided in an embodiment of the present invention determine Continuous Mappings in method
Feedback resources schematic diagram.Referring to figure 5., it is assumed that multicast group includes k+2 member, which includes one special
UE and Tx UE (i.e. the 2nd UE), the 2nd UE use k+1 member transmission group of the PSSCH subchannel 0 into multicast group
Multicast data, the special UE in the k+1 member determine that feedback resources (are not illustrated in figure using formula using formula (1) as above
(1) feedback resources determined), the feedback resources of other k Rx UE other than special UE and the 2nd UE form continuous money
Source, such as PSFCH0~PSFCH (k-1) in figure, the k feedback resources are continuous.Initial feedback resource in the k feedback resources
For PSFCH0, as the second reference parameter.
In general, the membership in different multicast groups, i.e., above-mentioned k+2 are different.Therefore it is presumed that network side equipment is pre-
Continuous X feedback resources first are divided for each multicast group, it is contemplated that the special UE in multicast group determines feedback using formula (1)
Resource, it is assumed that the feedback resources are not belonging to the X feedback resources, and therefore, network side equipment gives the multicast comprising k+2 member
Group is assigned with X+1 feedback resources, sorts to obtain second queue to other UE in multicast group other than special UE and the 2nd UE.
It include k UE in second queue when the first UE is not special UE, the index for organizing interior position is followed successively by 1~k in the present embodiment.
Assuming that share 8 members in multicast group, then in multicast group in the group of each UE mark be followed successively by 1., 2., 3., 4., 5., 6., 7.,
8. being identified as UE 4. in group is the 2nd UE, the UE being identified as in group 1. is special UE, then second queue include in group mark according to
Secondary is UE 2., 3., 5., 6., 7., 8., and the location index of each UE in second queue is followed successively by 1,2,3,4,5,6.According to upper
Known to the formula (2) stated:
The index of the feedback resources of UE 2. is identified as in group are as follows: the second reference parameter;
The index of the feedback resources of UE 3. is identified as in group are as follows: the second reference parameter+1
The index of the feedback resources of UE 5. is identified as in group are as follows: the second reference parameter+2
The index of the feedback resources of UE 6. is identified as in group are as follows: the second reference parameter+3;
The index of the feedback resources of UE 7. is identified as in group are as follows: the second reference parameter+4;
The index of the feedback resources of UE 8. is identified as in group are as follows: the second reference parameter+5;
As a kind of feasible embodiment, the second reference parameter can initial value, a time slot according to PSFCH resource
PSSCH subchannel number and the 2nd UE send the sub-channel index that multicast packet uses and determine in PSSCH, PSFCH resource
Initial value may be considered the value of the resource since the extreme higher position of all special UE feedback resources determined.Assuming that the first ginseng
Examining parameter is that PSSCH subchannel number is M, the second reference parameter is reference2 in reference1, PSSCH, then
Reference2=reference1+M+1.For the embodiment, the configuration of the second parameter can be saved, helps to reduce and match
Confidence enables.
Secondly, Third Way.
Illustratively, Third Way can also be referred to as intertexture mapping mode.Under Third Way, the feedback resources of the first UE
It is spacedly distributed with the feedback resources of other UE in the second queue.That is, other than the special UE in multicast group, group
The feedback resources for broadcasting other UE in group are mapped to discrete feedback resources, can be spacedly distributed, any in second queue
There is interval between the feedback resources of two neighboring UE, and the interval of the feedback resources of the adjacent UE of any two with other two
The interval of the feedback resources of adjacent UE is identical.Assuming that the 2nd UE uses 0 multicast data transmission of PSSCH subchannel, in multicast group
Each Rx UE is fed back using independent feedback resources, then for the special UE in multicast group, can use above-mentioned formula
(1) feedback resources are determined, and for other UE in multicast group, then it needs to be determined that other feedback resources.For example, can be by such as
Lower formula (3) determines feedback resources:
The index of the feedback resources of first UE=the the second reference parameter+(index-of position of the first UE in second queue
1) × preset interval (3)
In formula (3), the index of position of the first UE in second queue can be according to position of the first UE in second queue
Determination is set, preset interval can be indicated from the 2nd UE to the first UE;Alternatively, system message or special can be passed through by network side equipment
It is arranged with signaling;Alternatively, the first UE knows preset interval by the parameter being pre-configured.
Illustratively, reference can be made to Fig. 6, Fig. 6 are that feedback resources provided in an embodiment of the present invention determine the mapping that interweaves in method
Feedback resources schematic diagram.Please refer to Fig. 6, it is assumed that multicast group includes k+2 member, which includes one special
UE and Tx UE (i.e. the 2nd UE), the 2nd UE use k+1 member transmission group of the PSSCH subchannel 0 into multicast group
Multicast data, the special UE in the k+1 member determine that feedback resources (are not illustrated in figure using formula using formula (1) as above
(1) feedback resources determined), the feedback resources of other k UE other than special UE and the 2nd UE interweave.That is,
Assuming that feedback resources pond removes except the feedback resources determined according to formula (1) also comprising at least k group feedback resources, every group of feedback
The index of each feedback resources is followed successively by 0~(k-1) in resource, then in k Rx UE, the feedback resources group where different Rx UE is not
Together.For example, the feedback resources of the 1st UE belong to the 0th group of feedback resources, the feedback resources of the 2nd UE belong to the 1st group of feedback money
Source ....
Please refer to Fig. 6, it is assumed that 8 members are shared in multicast group, then in multicast group each UE group in mark be followed successively by 1.,
2., 3., 4., 5., 6., 7., 8., it is the 2nd UE that UE 4. is identified as in group, and the UE being identified as in group 1. is special UE, then second
Queue includes the UE that in group 2., 3., 5., 6., 7., 8. mark is followed successively by, and the location index of each UE in second queue is followed successively by
1,2,3,4,5,6.According to above-mentioned formula (3):
The index of the feedback resources of UE 2. is identified as in group are as follows: the second reference parameter;
The index of the feedback resources of UE 3. is identified as in group are as follows: the second reference parameter+1k;
The index of the feedback resources of UE 5. is identified as in group are as follows: the second reference parameter+2k;
The index of the feedback resources of UE 6. is identified as in group are as follows: the second reference parameter+3k;
The index of the feedback resources of UE 7. is identified as in group are as follows: the second reference parameter+4k;
The index of the feedback resources of UE 8. is identified as in group are as follows: the second reference parameter+5k;
Wherein, k is preset interval.
It can thus be appreciated that: feedback resources pond also includes at least 6 groups other than the feedback resources comprising determining according to formula (1)
Feedback resources, the index of each feedback resources is followed successively by 0~5 in every group of feedback resources, then 6 UE form second queue, each UE's
Location index is followed successively by 1,2,3,4,5,6, then in 6 UE, the feedback resources of different UE belong to different feedback resources groups.
When the 2nd UE uses k+1 member multicast data transmission of the PSSCH subchannel 1 into multicast group, then the k+1 it is a at
Special UE in member determines feedback resources using formula (1) as above, other k UE's other than special UE and the 2nd UE is anti-
Present resource successively are as follows: the second reference parameter '+k, the second reference parameter '+2k, the second reference parameter '+3k ..., wherein second
Reference parameter '=the second reference parameter+1.When the 2nd UE sends multicast packet using other PSSCH subchannels, the first UE can
Feedback resources are determined in the same way, and the embodiment of the present invention repeats no more.
It should be noted that each UE knows the multicast group belonging to oneself in the present embodiment, a UE can belong to simultaneously
Multiple multicast groups, when UE is registered, network side equipment can configure mark etc. in the information and group of multicast group for UE.
Finally, fourth way.
Illustratively, fourth way can also be referred to as pseudorandom mapping mode.Under fourth way, the feedback of no special UE
The feedback resources unequal interval of other UE is distributed in resource and first queue.First UE is when determining feedback resources, according to first
The index and feedback resources set of position of the UE in second queue, determine the feedback resources of the first UE, feedback resources set
Comprising L feedback resources, which does not include the feedback resources determined according to first method.Such as network side equipment
It, can be using this L feedback resources of separate configurations as feedback resources set, for removing spy in multicast group when configuring feedback resources pond
The feedback resources of other Rx UE except different UE;Alternatively, network side can configure total feedback resources pond, such as include N number of feedback
The feedback resources pond of resource can determine according to formula (1) and need M feedback resources, then L=N-M.Assuming that the 2nd UE is used
0 multicast data transmission of PSSCH subchannel, each Rx UE in multicast group is fed back using independent feedback resources, then for group
The special UE in group is broadcast, feedback resources can be determined using above-mentioned formula (1), and for other Rx UE in multicast group,
Then it needs to be determined that other feedback resources.For example, feedback resources can be determined by following formula (4):
The PSSCH subchannel used when the index of feedback resources=second the+the two UE multicast data transmission of reference parameter
Index+(index -1 of position of the first UE in second queue) × third reference parameter (4)
Third reference parameter is determined according to the membership in L and second queue.For different multicast groups, group member's number
Difference causes the value of third reference parameter to be different.
Illustratively, since network side equipment is not aware that how many Tx UE developing multicast industry in a time slot in advance
Business, if only part Tx UE developing multicast business, such as 20% Tx UE developing multicast business, at this point, according to above-mentioned company
Continuous mapping mode or intertexture mapping mode then may cause the waste of feedback resources.Therefore, in the embodiment of the present invention, network side is set
It is standby to divide a feedback resources pond after configuring feedback resources according to formula (1) for the special UE in multicast group for multicast group, it should
Feedback resources pond includes L continuous resources.Later, each UE in second queue can be according to the member in L and second queue
Number determine third reference parameter, which is, for example, that the quotient of L/k is rounded, and k is member in second queue
Number, the quantity that k is total member in multicast group in other words subtract 2 obtained values, according to the index of third reference parameter, position with
And the index of the PSSCH subchannel used when the 2nd UE multicast data transmission determines the index of feedback resources.For example, it is assumed that second
The index of the PSSCH subchannel used when UE multicast data transmission is subchannel index, L/k=interval, then and
Index=subchannel index of the feedback resources for the UE that location index in two queues is 1;Position in second queue
Index=subchannel index+interval of the feedback resources for the UE that index is 2;Location index in second queue is
The index of the feedback resources of 3 UE=subchannel index+2interval.Because the value of interval depends on the
The UE quantity of two queues, the UE quantity of second queue is different in different multicast groups, causes interval value different.Namely
It says, the third reference parameter in fourth way is different from preset interval in Third Way.
In above-described embodiment, the PSFCH period is integer more than or equal to 1, such as 1,2,4.It is 1 when the PSFCH period
When time slot, illustrate that the PSFCH on a time slot can feed back the PSSCH on 1 time slot;When the PSFCH period is 2 time slots,
Illustrate that the PSFCH on a time slot can feed back the PSSCH on 2 time slots.Illustratively, reference can be made to Fig. 7, Fig. 7 are the present invention
The feedback resources that embodiment provides determine the schematic diagram in PSFCH period in method.
(a) in Fig. 7 is please referred to, the PSFCH period is 1 time slot, and 1 PSSCH subchannel on time slot n corresponds to time slot (n
+ k) on a PSFCH resource, at this point, being determined on time slot (n+k) after the first UE receives PSSCH subchannel on time slot n
Feedback resources (i.e. PSFCH resource), and fed back on feedback resources for the PSSCH subchannel.
Please refer to (b) in Fig. 7, the PSFCH period is 2 time slots, in the PSFCH subchannel and time slot (n+1) on time slot n
PSSCH subchannel correspond to the PSFCH resource on time slot (n+k).At this point, the first UE is received on time slot n or time slot (n+1)
After V2X data on to PSSCH subchannel, the feedback resources (i.e. PSFCH resource) on time slot (n+k) are determined, and feeding back
It is fed back in resource for the TX UE using the PSSCH subchannel on time slot n or time slot (n+1).Wherein, k is greater than 1,
And the value of k depends on the minimum treat time delay etc. of the first UE.
In the following, for (b) in Fig. 7, how the first UE determines that feedback resources are described in detail.
It is exemplary, it is fed back if necessary to the PSSCH for two time slots, then the PSSCH subchannel of time slot n is corresponding
Feedback resources can be obtained by above-mentioned formula (1)-(4), and the corresponding feedback resources of PSSCH subchannel of time slot (n+1)
It needs to reuse above-mentioned formula (1) to (4) acquisition on the basis of all PSFCH resources determined by time slot n exact anti-
Present resource.For example it is assumed that all largest index for receiving feedback resources determined by UE are the 4th reference parameter in time slot n, then
Using following formula (5) when determining feedback resources for special UE in time slot n+1
The index of the feedback resources of special UE=the 4th reference parameter+PSSCH sub-channel index (5) in time slot n+1
That is, it is anti-to occupy front portion for the corresponding feedback resources of PSSCH subchannel that feedback slot n is received
Resource is presented, particular number depends on the difference of the 4th reference parameter and the first reference parameter, and is used for feedback slot (n+1) reception
The corresponding feedback resources of the PSSCH subchannel arrived occupy next feedback resources.
Likewise, corresponding modification can be made for formula (2)-(4), enables and receive the UE of multicast in time slot n+1
Determine feedback resources.
In above-described embodiment, the time slot where two PSSCH be it is continuous, in practice can be discontinuous.The present invention is same
It is applicable in.
It should be noted that how to determine feedback when (a) and (b) in above-mentioned Fig. 7 is respectively 1 and 2 to the PSFCH period
Resource is described in detail.However, the embodiment of the present invention is not intended to limit, in other feasible implementations, the PSFCH period can
Think 4 or other values etc..
It should be noted that special UE and other UE in multicast group are determined in different ways in above-described embodiment
PSFCH resource.Wherein, special UE can be one or more.This is because for a multicast group, network side equipment is in advance not
The quantity of the member in the multicast group is known, so feedback resources that will not be excessive to the Multicast Group Assignment.When in second queue
When number of members is greater than the k in Continuous Mappings mode or intertexture mapping mode, or when greater than L in pseudorandom mapping mode,
At this point, for above-mentioned Continuous Mappings mode, intertexture mapping mode or pseudorandom mapping mode can not be used to determine feedback resources
UE can share feedback resources with special UE.
In above-described embodiment, each feedback resources can take up one or several independent Physical Resource Block (Physical
Resource Block, PRB), specific granularity is preset by network configuration or agreement.Alternatively, each feedback resources can be with
It can be multiplexed.For example, a PRB can permit 4 the first UE multiplexings, then 4 the first UE are determined each according to aforesaid way
Mode from independent feedback resources and then according to multiplexing obtains actual physical resource.For example, multiplex mode is 4 the
One UE is multiplexed the same physical resource, then this 4 the first UE map the PSFCH resource of above-mentioned determination again, such as the fortune of modulus 4
It calculates, to obtain actual physical resource, each first UE realizes multiplexing using respective orthogonal code in acquisition process.With above-mentioned
For the feedback resources index that 4 the first UE are determined is 4,5,6,7, according to the operation of mould 4, this 4 the first UE are in the same object
It manages and realizes multiplexing in resource, direct link is carried out in the physical resource using the first orthogonal code for 4 the first UE for indexing
Feedback;Use the second orthogonal code in the feedback of physical resource progress direct link for 5 the first UE for indexing;For index
Use third orthogonal code in the feedback of physical resource progress direct link for 6 the first UE;It is adopted for indexing for 7 the first UE
The feedback of direct link is carried out in the physical resource with the 4th orthogonal code.When multiplexing, there is still a need for according to above-mentioned side by each first UE
Formula determines oneself independent feedback resources, and then the mode according to multiplexing determines actual physical resource.The embodiment of the present invention is simultaneously
It whether does not limit using multiplex mode.
Following is apparatus of the present invention embodiment, can be used for executing embodiment of the present invention method.For apparatus of the present invention reality
Undisclosed details in example is applied, embodiment of the present invention method is please referred to.
Fig. 8 is a kind of structural schematic diagram of feedback resources determining device provided in an embodiment of the present invention.The feedback resources are true
Determining device 100 can be realized by way of software and/or hardware.As shown in figure 8, the true device of the feedback resources fixed 100 includes:
Transmit-Receive Unit 11, the multicast packet transmitted for receiving the 2nd UE by direct link, the direct link are institute
State the link communicated between the first UE and the 2nd UE by PC5 interface;
Processing unit 12, the different modes instruction for determining targeted manner from mode set, in the mode set
In different feedback resources methods of determination, the targeted manner and multicast group in addition to the first UE and the 2nd UE at least
One UE determines that the mode of feedback resources is different, according to the targeted manner, determines that feedback resources, the feedback resources are described
First UE is used to send the resource of feedback information to the 2nd UE.
In a kind of feasible design, the processing unit 12, for the group according to the first UE in the multicast group
Interior mark determines the targeted manner from the mode set.
In a kind of feasible design, the processing unit 12, for according to identifying in described group, determining that the first UE is
No is special UE, the special UE include in the specified group member of the 2nd UE or first queue in the group of predeterminated position at
Member, the first queue is ranked up to other UE in the multicast group in addition to the 2nd UE;If described
One UE is the special UE, it is determined that the targeted manner is the first method in the mode set;Wherein, the first party
Under formula, the index for the PSSCH subchannel that the index of the feedback resources uses when transmitting the multicast packet by the 2nd UE
Determine that first reference parameter is the initial value of PSFCH resource with the first reference parameter.
In a kind of feasible design, the Transmit-Receive Unit 11 is also used to receive the instruction information of network side equipment transmission, institute
It states instruction information and is used to indicate first reference parameter;
Alternatively,
The Transmit-Receive Unit 11 is also used to receive the instruction information that the 2nd UE is sent by the direct link, institute
It states instruction information and is used to indicate first reference parameter;
Alternatively,
The processing unit 12 is determined for the frequency domain position according to the PSSCH resource by preset transformational relation
First reference parameter;
Alternatively,
The processing unit 12 is also used to the first reference parameter described in the gain of parameter by network side equipment pre-configuration.
In a kind of feasible design, the processing unit 12, if being also used to the first UE is not the special UE, really
The fixed targeted manner is any one mode in second method, Third Way or fourth way in the mode set;
The feedback resources of other UE, which are formed, under the second method, in the feedback resources and second queue of the first UE connects
Continuous resource;
Under the Third Way, the feedback resources etc. of other UE in the feedback resources of the first UE and the second queue
It is spaced apart;
Under the fourth way, the feedback resources of the feedback resources and other UE in the second queue of the first UE are non-
It is spacedly distributed;
Wherein, the second queue is to reject the special UE from the first queue to obtain.
In a kind of feasible design, the processing unit 12, under the second method, according to the first UE in institute
The position in second queue is stated, determines the feedback resources of the first UE.
In a kind of feasible design, the processing unit 12, under the Third Way, according to the first UE in institute
The position in second queue and preset interval are stated, determines the feedback resources of the first UE.
In a kind of feasible design, the processing unit 12, under the fourth way, according to the first UE in institute
The position in second queue and feedback resources set are stated, determines the feedback resources of the first UE, the position is described the
Position of one UE in the second queue, the feedback resources set include L feedback resources, and the feedback resources set is
Feedback resources set in addition to the feedback resources determined according to the first method.
In a kind of feasible design, the processing unit 12, for determining physics direct link feedback channel PSFCH weeks
Phase, the PSSCH timeslot number that the PSFCH that the PSFCH period is used to indicate on a time slot can be fed back, according to the PSFCH
Period and the targeted manner determine the feedback resources.
In a kind of feasible design, the PSFCH period is greater than or equal to 1 and is integer.
Feedback resources determining device provided in an embodiment of the present invention, can execute the movement of the 2nd UE in above-described embodiment,
That the realization principle and technical effect are similar is similar for it, and details are not described herein.
It should be noted that processing unit can be with it should be understood that the above Transmit-Receive Unit can be in actual implementation transceiver
Software is realized by way of processing element calls;It can also realize in the form of hardware.For example, processing unit can be independent
The processing element set up also can integrate and realize in some chip of above-mentioned apparatus, in addition it is also possible to program code
Form is stored in the memory of above-mentioned apparatus, is called by some processing element of above-mentioned apparatus and is executed the above processing unit
Function.Furthermore these units completely or partially can integrate together, can also independently realize.Processing element described here
It can be a kind of integrated circuit, the processing capacity with signal.During realization, each step of the above method or more than it is each
Unit can be completed by the integrated logic circuit of the hardware in processor elements or the instruction of software form.
For example, the above unit can be arranged to implement one or more integrated circuits of above method, such as:
One or more specific integrated circuits (Application Specific Integrated Circuit, ASIC), or, one
Or multi-microprocessor (Digital Signal Processor, DSP), or, one or more field programmable gate array
(Field Programmable Gate Array, FPGA) etc..For another example, when some above unit dispatches journey by processing element
When the form of sequence code is realized, which can be general processor, such as central processing unit (Central
Processing Unit, CPU) or it is other can be with the processor of caller code.For another example, these units can integrate one
It rises, is realized in the form of system on chip (System-On-a-Chip, SOC).
Fig. 9 is a kind of structural schematic diagram of user equipment provided in an embodiment of the present invention.As shown in figure 9, the user equipment
200 include:
Processor 21 and memory 22;
The memory 22 stores computer executed instructions;
The processor 21 executes the computer executed instructions that the memory 22 stores, so that the processor 21 executes
The feedback resources that first UE as above is executed determine method.
The specific implementation process of processor 21 can be found in above method embodiment, and it is similar that the realization principle and technical effect are similar,
Details are not described herein again for the present embodiment.
Optionally, which further includes communication component 23.Wherein, processor 21, memory 22 and communication unit
Part 23 can be connected by bus 24.
The embodiment of the present invention also provides a kind of storage medium, and computer executed instructions, institute are stored in the storage medium
It states and determines method when computer executed instructions are executed by processor for realizing the first UE as above feedback resources executed.
The embodiment of the present invention also provides a kind of computer program product, when the computer program product is transported on the first UE
When row, method is determined for realizing the first UE feedback resources executed.
In the above-described embodiment, it should be understood that described device and method, it can be real by another way
It is existing.For example, apparatus embodiments described above are merely indicative, for example, the division of the module, only one kind are patrolled
Function division is collected, there may be another division manner in actual implementation, such as multiple modules may be combined or can be integrated into
Another system, or some features can be ignored or not executed.Another point, shown or discussed mutual coupling or
Direct-coupling or communication connection can be through some interfaces, and the indirect coupling or communication connection of device or module can be electricity
Property, mechanical or other forms.
The module as illustrated by the separation member may or may not be physically separated, aobvious as module
The component shown may or may not be physical unit, it can and it is in one place, or may be distributed over multiple
In network unit.Some or all of the modules therein can be selected to realize the mesh of this embodiment scheme according to the actual needs
's.
It, can also be in addition, each functional module in each embodiment of the present invention can integrate in one processing unit
It is that modules physically exist alone, can also be integrated in one unit with two or more modules.Above-mentioned module at
Unit both can take the form of hardware realization, can also realize in the form of hardware adds SFU software functional unit.
The above-mentioned integrated module realized in the form of software function module, can store and computer-readable deposit at one
In storage media.Above-mentioned software function module is stored in a storage medium, including some instructions are with so that an electronics is set
Standby (can be personal computer, server or the network equipment etc.) or processor (English: processor) execute the present invention
The part steps of each embodiment the method.
It should be understood that above-mentioned processor can be central processing unit (Central Processing Unit, CPU), may be used also
To be other general processors, digital signal processor (Digital Signal Processor, DSP), specific integrated circuit
(Application Specific Integrated Circuit, ASIC) etc..General processor can be microprocessor or
The processor is also possible to any conventional processor etc..It can be embodied directly in conjunction with the step of invention disclosed method hard
Part processor executes completion, or in processor hardware and software module combination execute completion.
Memory may include high speed RAM memory, it is also possible to and it further include non-volatile memories NVM, for example, at least one
Magnetic disk storage can also be USB flash disk, mobile hard disk, read-only memory, disk or CD etc..
Bus can be industry standard architecture (Industry Standard Architecture, ISA) bus, outer
Portion's apparatus interconnection (Peripheral Component Interconnect, PCI) bus or extended industry-standard architecture
(Extended Industry Standard Architecture, EISA) bus etc..Bus can be divided into address bus, number
According to bus, control bus etc..For convenient for indicating, the bus in attached drawing of the present invention does not limit only a bus or a seed type
Bus.
Above-mentioned storage medium can be by any kind of volatibility or non-volatile memory device or their combination
It realizes, 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,
Disk or CD.Storage medium can be any usable medium that general or specialized computer can access.
A kind of illustrative storage medium is coupled to processor, believes to enable a processor to read from the storage medium
Breath, and information can be written to the storage medium.Certainly, storage medium is also possible to the component part of processor.It processor and deposits
Storage media can be located in specific integrated circuit (Application Specific Integrated Circuits, ASIC).
Certainly, pocessor and storage media can also be used as discrete assembly and be present in terminal or server.
Those of ordinary skill in the art will appreciate that: realize that all or part of the steps of above-mentioned each method embodiment can lead to
The relevant hardware of program instruction is crossed to complete.Program above-mentioned can be stored in a computer readable storage medium.The journey
When being executed, execution includes the steps that above-mentioned each method embodiment to sequence;And storage medium above-mentioned include: ROM, RAM, magnetic disk or
The various media that can store program code such as person's CD.
Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention., rather than its limitations;To the greatest extent
Pipe present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that: its according to
So be possible to modify the technical solutions described in the foregoing embodiments, or to some or all of the technical features into
Row equivalent replacement;And these are modified or replaceed, various embodiments of the present invention technology that it does not separate the essence of the corresponding technical solution
The range of scheme.
Claims (22)
1. a kind of feedback resources determine method characterized by comprising
First user equipment (UE) receives the multicast packet that the 2nd UE is transmitted by direct link, and the direct link is described first
The link communicated between UE and the 2nd UE by PC5 interface;
First UE determines that targeted manner, the different modes in the mode set indicate different feedbacks from mode set
At least one UE in resource method of determination, the targeted manner and multicast group in addition to the first UE and the 2nd UE is determined
The mode of feedback resources is different;
First UE determines that feedback resources, the feedback resources are used for for the first UE to institute according to the targeted manner
State the resource that the 2nd UE sends feedback information.
2. the method according to claim 1, wherein the first UE from mode set determine targeted manner,
Include:
First UE is identified in the group in the multicast group according to the first UE, from the mode set described in determination
Targeted manner.
3. according to the method described in claim 2, it is characterized in that, the first UE is according to the first UE in the multicast group
Mark in interior group, determines the targeted manner from the mode set, comprising:
First UE determines whether the first UE is special UE according to identifying in described group, and the special UE includes described
The group member of predeterminated position in 2nd UE specified group member or first queue, the first queue is to the multicast group
What interior other UE in addition to the 2nd UE were ranked up;
If the first UE is the special UE, the first UE determines that the targeted manner is the in the mode set
One mode;
Wherein, under the first method, the index of the feedback resources uses when transmitting the multicast packet by the 2nd UE
PSSCH subchannel index and the first reference parameter determine, first reference parameter is the initial value of PSFCH resource.
4. according to the method described in claim 3, it is characterized by further comprising:
First UE determines first reference parameter by any one mode in following manner:
First UE receives the instruction information that network side equipment is sent, and the instruction information is used to indicate described first with reference to ginseng
Number;
Alternatively,
First UE receives the instruction information that the 2nd UE is sent by the direct link, and the instruction information is for referring to
Show first reference parameter;
Alternatively,
First UE determines that first reference is joined by preset transformational relation according to the frequency domain position of the PSSCH resource
Number;
Alternatively,
First reference parameter described in gain of parameter of first UE by pre-configuration.
5. the method according to claim 3 or 4, which is characterized in that further include:
If the first UE is not the special UE, the first UE determines that the targeted manner is in the mode set
Any one mode in second method, Third Way or fourth way;
Under the second method, the feedback resources of other UE form continuous money in the feedback resources and second queue of the first UE
Source;
The feedback resources of other UE are at equal intervals under the Third Way, in the feedback resources of the first UE and the second queue
Distribution;
Under the fourth way, between the feedback resources of other UE are non-etc. in the feedback resources of the first UE and the second queue
Every distribution;
Wherein, the second queue is to reject the special UE from the first queue to obtain.
6. according to the method described in claim 5, it is characterized in that, the first UE determines feedback according to the targeted manner
Resource, comprising:
Under the second method, position of the first UE according to the first UE in the second queue determines described
The feedback resources of one UE.
7. according to the method described in claim 5, it is characterized in that, the first UE determines feedback according to the targeted manner
Resource, comprising:
Under the Third Way, the first UE according to position of the first UE in the second queue and preset interval,
Determine the feedback resources of the first UE.
8. according to the method described in claim 5, it is characterized in that, the first UE determines feedback according to the targeted manner
Resource, comprising:
Under the fourth way, the first UE is according to position of the first UE in the second queue and feedback resources collection
It closes, determines the feedback resources of the first UE, the position is position of the first UE in the second queue, described
Feedback resources set includes L feedback resources, and the feedback resources set is except the feedback determined according to the first method provides
Feedback resources set except source.
9. described in any item methods according to claim 1~8, which is characterized in that the first UE according to the targeted manner,
Determine feedback resources, comprising:
First UE determines that physics direct link feedback channel PSFCH period, the PSFCH period are used to indicate a time slot
On the PSSCH timeslot number that can feed back of PSFCH;
First UE determines the feedback resources according to the PSFCH period and the targeted manner.
10. according to the method described in claim 9, it is characterized in that, the PSFCH period is more than or equal to 1 and is integer.
11. a kind of feedback resources determining device characterized by comprising
Transmit-Receive Unit, the multicast packet transmitted for receiving the 2nd UE by direct link, the direct link are described first
The link communicated between UE and the 2nd UE by PC5 interface;
Processing unit, for determining that targeted manner, the different modes in the mode set indicate different from mode set
At least one UE in feedback resources method of determination, the targeted manner and multicast group in addition to the first UE and the 2nd UE
It determines that the mode of feedback resources is different, according to the targeted manner, determines that feedback resources, the feedback resources are the first UE
For sending the resource of feedback information to the 2nd UE.
12. device according to claim 11, which is characterized in that
The processing unit, for being identified in the group in the multicast group according to the first UE, from the mode set
Determine the targeted manner.
13. device according to claim 12, which is characterized in that
The processing unit, for determining whether the first UE is special UE according to identifying in described group, the special UE packet
The group member of predeterminated position in the specified group member of the 2nd UE or first queue is included, the first queue is to described
What other UE in multicast group in addition to the 2nd UE were ranked up;If the first UE is the special UE, it is determined that
The targeted manner is the first method in the mode set;Wherein, under the first method, the index of the feedback resources
The index and the first reference parameter of the PSSCH subchannel used when transmitting the multicast packet by the 2nd UE determine, described
First reference parameter is the initial value of PSFCH resource.
14. device according to claim 13, which is characterized in that
The Transmit-Receive Unit, is also used to receive the instruction information of network side equipment transmission, and the instruction information is used to indicate described
First reference parameter;
Alternatively,
The Transmit-Receive Unit is also used to receive the instruction information that the 2nd UE is sent by the direct link, the instruction
Information is used to indicate first reference parameter;
Alternatively,
First UE determines that first reference is joined by preset transformational relation according to the frequency domain position of the PSSCH resource
Number;
Alternatively,
The processing unit is also used to the first reference parameter described in the gain of parameter by network side equipment pre-configuration.
15. device described in 3 or 14 according to claim 1, which is characterized in that
The processing unit, if being also used to the first UE is not the special UE, it is determined that the targeted manner is the side
Second method, Third Way in formula set or any one mode in fourth way;
Under the second method, the feedback resources of other UE form continuous money in the feedback resources and second queue of the first UE
Source;
The feedback resources of other UE are at equal intervals under the Third Way, in the feedback resources of the first UE and the second queue
Distribution;
Under the fourth way, between the feedback resources of other UE are non-etc. in the feedback resources of the first UE and the second queue
Every distribution;
Wherein, the second queue is to reject the special UE from the first queue to obtain.
16. device according to claim 15, which is characterized in that
The processing unit, for according to position of the first UE in the second queue, determining under the second method
The feedback resources of first UE.
17. device according to claim 15, which is characterized in that
The processing unit is used under the Third Way, according to position of the first UE in the second queue and in advance
If interval, determines the feedback resources of the first UE.
18. device according to claim 15, which is characterized in that
The processing unit is used under the fourth way, according to position of the first UE in the second queue and instead
Resource collection is presented, determines the feedback resources of the first UE, the position is the first UE in the second queue
Position, the feedback resources set include L feedback resources, and the feedback resources set is except determining according to the first method
Feedback resources except feedback resources set.
19. 1~18 described in any item devices according to claim 1, which is characterized in that
The processing unit, for determining that physics direct link feedback channel PSFCH period, the PSFCH period are used to indicate
The PSSCH timeslot number that PSFCH on one time slot can be fed back determines institute according to the PSFCH period and the targeted manner
State feedback resources.
20. device according to claim 19, which is characterized in that the PSFCH period is greater than or equal to 1 and is integer.
21. a kind of user equipment characterized by comprising processor, memory and computer program;Wherein, the calculating
Machine program is stored in the memory, and is configured as being executed by the processor, and the computer program includes using
In the instruction for executing such as described in any item methods of claim 1-10.
22. a kind of storage medium, which is characterized in that instruction is stored in the storage medium, when it runs on a user device
When, so that user equipment executes such as the described in any item methods of claim 1-10.
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