CN108924892A - A kind of D2D communication means and device - Google Patents
A kind of D2D communication means and device Download PDFInfo
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- CN108924892A CN108924892A CN201710223562.6A CN201710223562A CN108924892A CN 108924892 A CN108924892 A CN 108924892A CN 201710223562 A CN201710223562 A CN 201710223562A CN 108924892 A CN108924892 A CN 108924892A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/06—Reselecting a communication resource in the serving access point
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/24—Reselection being triggered by specific parameters
- H04W36/30—Reselection being triggered by specific parameters by measured or perceived connection quality data
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/02—Selection of wireless resources by user or terminal
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/20—Control channels or signalling for resource management
- H04W72/21—Control channels or signalling for resource management in the uplink direction of a wireless link, i.e. towards the network
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/50—Allocation or scheduling criteria for wireless resources
- H04W72/53—Allocation or scheduling criteria for wireless resources based on regulatory allocation policies
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Abstract
This application involves field of communication technology, a kind of D2D communication means and device are disclosed, to provide a kind of autonomous switching method of flexible D2D communication pattern.This method is：Terminal carries out D2D communication using the first D2D communication pattern, and the first D2D communication pattern includes the first method for the D2D resource that the terminal is obtained for D2D communication；Meet if imposing a condition, the terminal sends D2D communication pattern switching request to base station；The terminal receives the D2D communication pattern switching command that the base station returns, D2D communication is carried out using the 2nd D2D communication pattern according to the D2D communication pattern switching command, the 2nd D2D communication pattern includes the second method for the D2D resource that terminal is obtained for D2D communication.
Description
Technical field
The invention relates to field of communication technology more particularly to a kind of D2D communication means and device.
Background technique
Device-to-device (Device-to-Device, D2D) communication is a kind of highly important logical in wireless cellular network
Believe type.D2D communication is directly communicated between terminal and terminal, can simplify the process of communication, and when in terminal and end
In the case that distance is closer between end, D2D communication can play good effect.As shown in Figure 1, giving the field of D2D communication
Scape schematic diagram, wherein terminal 1, terminal 2 and terminal 3 carry out the communication of traditional approach, and terminal with base station by access link
It is that D2D communication is carried out by D2D link between 4 and terminal 5 and between terminal 6 and terminal 7.Message is sent out to eventually with terminal 4
For end 5, communicated according to traditional access link, then terminal 4 needs first to transmit the message to base station, after base station receives
The message is issued into terminal 5.It is communicated according to D2D, terminal 4 can directly send out message to terminal 5, so as to simplify communication
Process reduces the time delay of communication, significantly improves the efficiency of communication.
In the prior art, it is usually uplink resources that D2D, which communicates used resource, for example, in LTE system, just
It is to mark off a part in uplink resources to communicate for D2D.This part resource for D2D communication may be generally referred to as
D2D resource pool.D2D resource pool contains the sub-frame of uplink and upstream band that can be used for D2D transmission.As shown in Fig. 2, giving
The schematic diagram of D2D communication resource distribution includes the sub-frame of uplink (such as dash area) periodically occurred in D2D resource pool, and on
Frequency band in row bandwidth for D2D communication.In addition, being directed to different D2D business, base station can distribute special D2D money for it
Source, for example, being used for the D2D communication resource pond of D2D communication service, the D2D for D2D discovery business has found resource pool, is used for D2D
Synchronous D2D isochronous resources pond.
In LTE system, in a kind of D2D communication pattern, terminal carries out D2D communication and base station is needed to carry out resource allocation.Tool
Body, as shown in figure 3, terminal before carrying out D2D communication, needs first to send the request of D2D communication scheduling to base station, base station is received
Descending control signaling (Downlink Control Information, DCI) can be sent after D2D communication scheduling request to indicate
Physical Uplink Shared Channel (Physical Uplink Shared Channel, PUSCH) resource, terminal send D2D to base station
Caching report, base station are the terminal distribution D2D communication resource, and send DCI to terminal and be indicated to the D2D communication resource of distribution
Terminal, terminal carry out D2D communication according to the D2D communication resource that DCI is indicated.In this way, the process that terminal carries out D2D communication needs end
End with carry out multiple process between base station and interact, not only signaling overheads is bigger, and the time delay of communication is also larger.
In another D2D communication pattern, terminal carries out D2D communication and does not need base station progress resource allocation, but in base station
D2D resource is independently chosen in the D2D resource pool of configured in advance, in this way, different terminals may choose identical D2D resource, from
And D2D resource is caused to collide.
To sum up, using the configuration mode of existing D2D communication pattern, it will cause terminal and use D2D communication pattern single, from
And the problem of bringing signaling overheads big or D2D resource collision, the usage mode of D2D communication pattern is inflexible, causes D2D logical
Believe that efficiency reduces.
Summary of the invention
The embodiment of the present application provides a kind of D2D communication means and device, to solve the usage mode of D2D communication pattern not
Enough flexibly, the problem of causing D2D communication efficiency to reduce.
Specific technical solution provided by the embodiments of the present application is as follows：
In a first aspect, providing a kind of D2D communication means, terminal actively triggers D2D communication pattern when setting condition meets
Switching improve D2D communication so that terminal can adapt to the application scenarios of itself using the D2D communication pattern after switching
Efficiency.
In a possible design, terminal carries out D2D communication using the first D2D communication pattern, wherein described first
D2D communication pattern includes the first method for the D2D resource that the terminal is obtained for D2D communication, and the terminal is determining to set
When condition meets, D2D communication pattern switching request is sent to base station, and in the D2D communication pattern for receiving the base station return
After switching command, according to the D2D communication pattern switching command using the 2nd D2D communication pattern carry out D2D communication, described second
D2D communication pattern includes the second method for the D2D resource that terminal is obtained for D2D communication.In this way, helping to solve existing
D2D communication pattern switches inflexible problem, so that D2D communication can preferably adapt to different business demands, and makes
With different network environments, to improve D2D communication efficiency.
In a possible design, in a kind of possible situation, the first D2D communication pattern is the terminal in base
Stand notice D2D resource pool according to the base station distribution D2D resource communicated, the 2nd D2D communication pattern is institute
State the terminal D2D resource that independently selection is communicated for D2D in the D2D resource pool that the base station notifies；In this case, institute
Setting condition is stated to comprise at least one of the following：The terminal is greater than using the propagation delay time that the first D2D communication pattern generates
The patient highest propagation delay time of terminal；The number of the terminal to base station transmission resource scheduling request is more than first
Given threshold, and do not receive the D2D used in the first D2D communication pattern that the base station is the terminal distribution and provide
Source.In this way, terminal can be changed to more suitable in time when current D2D communication pattern is not able to satisfy the business demand of itself
The D2D communication pattern of conjunction is communicated, and ensure that the satisfaction and communication quality of business demand.
In a possible design it is alternatively possible in the case where, the first D2D communication pattern be the terminal exist
Independently D2D resource of the selection for D2D communication, the 2nd D2D communication pattern are the end in the D2D resource pool of base station notice
It holds and is communicated in the D2D resource pool that base station notifies according to the D2D resource that the base station is distributed, in this possible situation
Under, the setting condition comprises at least one of the following：The number that the terminal continuously transmits identical data failure is more than second to set
Determine threshold value；The continuous time that the terminal listens to the D2D resource pool of the base station notice is more than third given threshold, and is had not been obtained
Idle D2D resource；The read-around ratio that the terminal listens to the D2D resource pool of the base station notice is more than the 4th given threshold, and
Idle D2D resource has not been obtained；The terminal carries out D2D using the 2nd D2D communication pattern and communicates service quality obtained
The terminal is unable to satisfy to the service quality of D2D business need.In this way, terminal is not able to satisfy in current D2D communication pattern
When the business demand of itself, it can be changed to the D2D communication pattern being more suitable in time and communicated, ensure that business demand
Satisfaction and communication quality.
In a possible design, the terminal is to base station sending mode switching request, especially by following manner reality
It is existing：The terminal increases PUCCH mode in the Physical Uplink Control Channel PUCCH of transmission, wraps in the increased PUCCH mode of institute
Include the information of the D2D communication pattern switching request.
In a possible design, the terminal passes through physical layer upstream control signaling sending mode switching request.
Second aspect provides a kind of D2D communication means, and base station receives the D2D communication pattern switching request that terminal is sent, and
D2D communication pattern switching command is returned to the terminal, the D2D communication pattern switching command is used to indicate the terminal by adopting
The 2nd D2D communication pattern is switched to the first D2D communication pattern and carries out D2D communication, and the first D2D communication pattern includes described
Terminal obtains the first method of the D2D resource for D2D communication, includes that terminal acquisition is used in the 2nd D2D communication pattern
The second method of the D2D resource of D2D communication.In this way, helping to solve existing D2D communication pattern to switch inflexible ask
Topic so that D2D communication can preferably adapt to different business demands, and uses different network environments, to improve D2D
Communication efficiency.
In a possible design, the base station receive terminal send D2D communication pattern switching request before, to
The terminal sends the first control signaling to indicate the first D2D resource pool, includes that the terminal is adopted in the first D2D resource pool
With the first D2D communication pattern carry out D2D communication allow using D2D resource；Base station is in the D2D communication pattern for receiving terminal transmission
After switching request, the second control signaling is sent to the terminal to indicate the 2nd D2D resource pool, the 2nd D2D resource pool
In include the terminal using the 2nd D2D communication pattern carry out D2D communication allow using D2D resource.
In a possible design, before the D2D communication pattern switching request that base station receives that terminal is sent, the base
It stands and sends third control signaling to the terminal to indicate to impose a condition, described impose a condition triggers the mould for the terminal
The transmission of formula switching request.
The third aspect, provides a kind of D2D communication device, which has times for realizing above-mentioned first aspect and first aspect
The function of terminal behavior in a kind of possible design.The function can also execute phase by hardware by hardware realization
The software realization answered.The hardware or software include one or more modules corresponding with above-mentioned function.
Fourth aspect, provides a kind of D2D communication device, which has times for realizing above-mentioned second aspect and second aspect
The function of base station behavior in a kind of possible design.The function can also execute phase by hardware by hardware realization
The software realization answered.The hardware or software include one or more modules corresponding with above-mentioned function.
5th aspect, provides a kind of D2D communication device, and the structure of the terminal includes transceiver, memory, processor and total
Line, wherein the memory is used to call the program of the memory storage to hold for storing batch processing, the processor
Row method as described in any possible design of above-mentioned first aspect and first aspect.
6th aspect, provides a kind of D2D communication device, and the structure of the base station includes transceiver, memory, processor and total
Line, wherein the memory is used to call the program of the memory storage to hold for storing batch processing, the processor
Row method as described in any possible design of above-mentioned second aspect and second aspect.
7th aspect, provides a kind of communication system, which includes device described in the third aspect or the 5th aspect, and
Device described in fourth aspect or the 6th aspect.
Eighth aspect provides a kind of computer storage medium, and for storing computer program, which includes
For executing any possible of first aspect, second aspect, any possible embodiment of first aspect or second aspect
The instruction of method in embodiment.
9th aspect, the embodiment of the present application provides a kind of computer program product comprising instruction, when it is in computer
When upper operation, so that computer executes method described in above-mentioned various aspects.
Detailed description of the invention
Fig. 1 is the schematic diagram of a scenario of D2D communication in the prior art；
Fig. 2 is the schematic diagram of D2D communication resource distribution in the prior art；
Fig. 3 is the schematic diagram that base station schedules terminals carry out D2D communication in the prior art；
Fig. 4 is communication system architecture schematic diagram in the embodiment of the present application；
Fig. 5 is one of D2D communication means flow diagram in the embodiment of the present application；
Fig. 6 is two of D2D communication means flow diagram in the embodiment of the present application；
Fig. 7 is three of middle D2D communication means flow diagram in the embodiment of the present application；
Fig. 8 is the schematic diagram of PUCCH mode resource configuration in the embodiment of the present application；
Fig. 9 is one of D2D communication apparatus structure schematic diagram in the embodiment of the present application；
Figure 10 is two of D2D communication apparatus structure schematic diagram in the embodiment of the present application；
Figure 11 is three of D2D communication apparatus structure schematic diagram in the embodiment of the present application；
Figure 12 is four of D2D communication apparatus structure schematic diagram in the embodiment of the present application.
Specific embodiment
Below in conjunction with attached drawing, the embodiment of the present application is described in detail.
The embodiment of the present application provides a kind of D2D communication means, and terminal actively triggers D2D communication when setting condition meets
The switching of mode improves D2D so that terminal can adapt to the application scenarios of itself using the D2D communication pattern after switching
Communication efficiency.
As shown in figure 4, including base station 401, at least one terminal 402 in the communication system 400 of the embodiment of the present application application.
Base station 401 is a kind of is deployed in wireless access network to provide the device of wireless communication function for terminal.Base station 401 can wrap
Include various forms of macro base stations, micro-base station, relay station, access point etc..It can apply and be in different wireless access technologys
In system, such as in long term evolution (Long Term Evolution, LTE) system, alternatively, the 5th generation (5th Generation,
5G) in more possible communication systems such as communication system.Base station 401 can also be other network equipments with base station functions,
Particularly, it can also be the terminal that base station functions are served as in D2D communication.Terminal 402 may include various with wireless communication function
Can handheld device, mobile unit, wearable device, calculate equipment or be connected to other processing of radio modem and set
Standby and various forms of user equipmenies (User Equipment, UE), mobile station (Mobile Station, MS) etc..
Optionally, terminal 402 is the D2D terminal in D2D communication.Pass through D2D communication chain between terminal 402 and terminal 402
Road carries out D2D communication.
In the embodiment of the present application, D2D communication pattern refers to that terminal obtains the mode of D2D resource and terminal utilizes acquisition
To the mode that is communicated of D2D resource.The embodiment of the present application can include but is not limited to following two D2D communication pattern：
One kind is：Terminal carries out the acquisition of D2D resource under the scheduling of base station；Another kind is：Terminal is distributed according to base station
D2D resource pool independently select D2D resource.
Communication system 400 as shown in connection with fig. 4, as shown in figure 5, in the embodiment of the present application D2D communication means specific stream
Journey is as described below.Wherein, the executing subject of this method is any one D2D terminal.
Step 501, terminal carry out D2D communication using the first D2D communication pattern.
Wherein, the first D2D communication pattern includes the first method for the D2D resource that terminal is obtained for D2D communication；
If step 502, imposing a condition meets, terminal sends D2D communication pattern switching request to base station, and base station receives eventually
Hold the D2D communication pattern switching request sent.
Optionally, before the D2D communication pattern switching request that base station receives that terminal is sent, base station sends third to terminal
Control signaling indicates above-mentioned setting condition, transmission of the above-mentioned setting condition for terminal triggering mode switch request.
Terminal triggers the switching of D2D communication pattern and needs to meet setting condition, and specific impose a condition will hereinafter do in detail
It describes in detail bright.
Step 503, base station return to D2D communication pattern switching command to terminal, and D2D communication pattern switching command is used to indicate
Terminal carries out D2D communication by being switched to the 2nd D2D communication pattern using the first D2D communication pattern；Terminal receives what base station returned
D2D communication pattern switching command.
Step 504, terminal carry out D2D communication using the 2nd D2D communication pattern according to D2D communication pattern switching command.
Wherein, the 2nd D2D communication pattern includes the second method for the D2D resource that terminal is obtained for D2D communication.
It should be noted that terminal actively triggers D2D communication pattern when setting condition meets in the embodiment of the present application
Switching, as long as meeting the method for above-mentioned steps, it will be understood that and though it is described impose a condition what is, belong to the application
The claimed range of embodiment.
It elaborates below to above-mentioned setting condition.
When the first D2D communication pattern be terminal in the D2D resource pool that base station notify according to base station distribute D2D resource into
Row communication, the 2nd D2D communication pattern are that independently selection is used for the D2D money of D2D communication to terminal in the D2D resource pool that base station notifies
When source, above-mentioned setting condition is comprised at least one of the following：
Terminal is greater than the patient highest propagation delay time of terminal using the propagation delay time that the first D2D communication pattern generates；
The number of terminal to base station transmission resource scheduling request is more than the first given threshold, and not receiving base station is terminal
The D2D resource used in the first D2D communication pattern of distribution.
When the first D2D communication pattern is that independently selection is used for D2D communication to terminal in the D2D resource pool that base station notifies
D2D resource, the 2nd D2D communication pattern are that terminal carries out in the D2D resource pool that base station notifies according to the D2D resource of base station distribution
When communication, above-mentioned setting condition is comprised at least one of the following：
The number that terminal continuously transmits identical data failure is more than the second given threshold；
The continuous time that terminal listens to the D2D resource pool of base station notice is more than third given threshold, and idle D2D has not been obtained
Resource；
The read-around ratio that terminal listens to the D2D resource pool of base station notice is more than the 4th given threshold, and idle D2D has not been obtained
Resource；
Terminal carries out D2D communication service quality obtained using the 2nd D2D communication pattern and is unable to satisfy terminal to D2D industry
The service quality that business requires.
Optionally, in step 502, terminal, can be in the following manner to base station sending mode switching request：
Terminal is in the Physical Uplink Control Channel (Physical Uplink Control Channel, PUCCH) of transmission
Increase PUCCH mode, institute increased PUCCH mode in including D2D communication pattern switching request information.
Optionally, before base station receives the D2D communication pattern switching request that terminal is sent, base station sends the first control to terminal
Signaling processed indicates the first D2D resource pool, includes that carry out D2D using the first D2D communication pattern logical for terminal in the first D2D resource pool
Letter allow using D2D resource.
After base station receives the D2D communication pattern switching request that terminal is sent, base station sends the second control signaling to terminal
It indicates the 2nd D2D resource pool, includes that terminal using the 2nd D2D communication pattern carries out D2D communication and allows in the 2nd D2D resource pool
The D2D resource used.
To sum up, in the embodiment of the present application, through terminal when setting condition meets, D2D communication pattern is sent to base station and is cut
The request changed executes the switching of D2D communication pattern after base station returns to D2D communication pattern switching command.Help to solve existing
D2D communication pattern switch inflexible problem so that D2D communication can preferably adapt to different business demands, and
Using different network environments, to improve D2D communication efficiency.
As shown in fig. 6, doing D2D communication means provided by the embodiments of the present application into one below with reference to specific application scenarios
Step is discussed in detail.
Step 601, base station are that terminal configures initial D2D communication pattern and corresponding D2D communication resource pond.
Assuming that initial D2D communication pattern is denoted as D2D communication pattern 1.Specifically, base station is each carry out D2D in cell
Initial D2D communication pattern and corresponding D2D communication resource pond is respectively configured in the terminal of communication.
Step 602, terminal carry out D2D communication according to initial D2D communication pattern and corresponding D2D communication resource pond.
Step 603, terminal, which judge whether to meet, to impose a condition, which is to trigger the item of D2D communication pattern switching
Part, for example, triggering is switched to the condition of D2D communication pattern 2 by D2D communication pattern 1.If so, executing step 604, otherwise execute
Step 602.
Step 604, determine meet impose a condition when, terminal to base station send D2D communication pattern switching request signaling.
Base station receives the signaling for the D2D communication pattern switching request that terminal is sent.
Specifically, the signaling of the D2D communication pattern switching request sent for terminal to base station, can be using in physical layer
Row control signaling is transmitted.For example, using physical layer uplink control channel (Physical Uplink Control Channel,
PUCCH it) transmits.
Step 605, base station are matched after receiving the signaling of D2D communication pattern switching request of terminal transmission for the terminal
It sets and D2D communication pattern that D2D communication pattern that the terminal is current is different, for example, D2D communication pattern 2 is configured for terminal, and
And corresponding D2D communication resource pond is configured for terminal.
The configuration information for the communication pattern that step 606, terminal are sent according to the base station received, it is logical to be switched to new D2D
Letter mode carries out D2D communication.For example, being switched to D2D communication pattern 2 carries out D2D communication.
Certainly, after step 606, if terminal determine to meet it is other impose a condition, will continue to triggering with it is described other
The corresponding D2D communication pattern of setting condition switching, other impose a condition for example, described to be switched by D2D communication pattern 2
The condition for returning D2D communication pattern 1, alternatively, being switched to the condition of communication pattern 3 by D2D communication pattern 2.
According to the difference of D2D communication pattern 1, setting condition described in above-mentioned steps 603 and step 604 is also different, tool
Body is illustrated according to two kinds of situations.
The first situation：
If D2D communication pattern 1 is：Terminal carries out in the D2D resource pool that base station notifies according to the D2D resource of base station distribution
Communication, in this case, D2D communication pattern 2 can be：Independently selection is used for terminal in the D2D resource pool that base station notifies
The D2D resource of D2D communication, or be other D2D communication patterns.Setting condition described in above-mentioned steps 603 and step 604 can
With but be not limited to include：
1) terminal carries out D2D communication using D2D communication pattern 1 and is unable to satisfy requirement of the D2D business of terminal for time delay.
For example, the time delay of D2D communication pattern 1 is 3 milliseconds, but the current D2D service delay requirement of terminal is 2 milliseconds,
Then meet setting condition.
2) terminal continuous N under D2D communication pattern 11It is secondary to fail to base station transmission D2D communication scheduling request.
For example, the terminal for working in D2D communication pattern 1 in cell is too many, then when terminal sends D2D communication scheduling to base station
When request, base station can not distribute resource in D2D communication resource pond for it, thus the communication scheduling of terminal is requested unsuccessfully to accuse
Eventually.
Both the above setting condition is only two kinds of citings of the embodiment of the present application, is not intended as limiting.
Second situation：
If D2D communication pattern 1 is：The terminal D2D that independently selection is communicated for D2D in the D2D resource pool that base station notifies
Resource, in this case, D2D communication pattern 2 can be：Terminal is distributed in the D2D resource pool that base station notifies according to base station
D2D resource communicated, or be other D2D communication patterns.Setting condition described in above-mentioned steps 603 and step 604
Can be, but not limited to include：
1) terminal send data packet (or data message) continuously fail N2Secondary, then triggering terminal sends D2D to base station and leads to
Believe mode switch request.
In this case illustrate that the terminal for carrying out D2D communication using D2D communication pattern 1 in current D2D resource pool is too many,
The collision situation of the D2D communication resource is very serious, then triggering terminal sends D2D communication pattern switching request to base station.
2) under D2D communication pattern 1, when terminal independently selects the D2D communication resource in D2D communication resource pond can first into
Row is listened to, and selection carries out the D2D resource of D2D communication for itself in the D2D resource that intercepted result is idle.This
Under application scenarios, if the continuous N of terminal2Secondary resource intercepted result be it is busy, then triggering terminal to base station send D2D communicate mould
Formula switching request.
3) terminal carries out D2D communication using D2D communication pattern 1 and is unable to satisfy the D2D business of terminal for service quality
When the requirement of (Quality of Service, QoS), then triggering terminal sends D2D communication pattern switching request to base station.
Three of the above setting condition is only two kinds of citings of the embodiment of the present application, is not intended as limiting.
D2D communication resource pond for terminal configuration can be notified by RRC signaling, be cut with triggering D2D communication pattern
The relevant parameter of signaling for changing request can also be notified together by RRC signaling.Wherein, triggering D2D communication pattern switching
The relevant parameter of the signaling of request N as the aforementioned1, N2。
It is more specifically real with one below with reference to Fig. 6 in order to better understand the D2D communication means of the embodiment of the present application
It is described in detail for existing mode.
As shown in fig. 7, D2D communication pattern 1 is：Terminal independently selects logical for D2D in the D2D resource pool that base station notifies
The D2D resource of letter, D2D communication pattern 2 are：Terminal in the D2D resource pool that base station notifies according to base station distribution D2D resource into
Row communication, under this specific application scenarios, the detailed process of D2D communication means is as described below.
Step 701, base station are that terminal configures D2D communication pattern 1 and corresponding D2D communication resource pond.
Wherein, D2D communication pattern 1 is：Independently selection is used for D2D communication to terminal in the D2D resource pool that base station notifies
D2D resource.
Step 702, terminal carry out D2D communication according to D2D communication pattern 1 and corresponding D2D communication resource pond.
Step 703, terminal judge data packet whether transmission success.If then completing the transmission of the data packet, continue to transmit
Other data packets, it is no to then follow the steps 704.
Specifically, terminal can be according to whether receive confirmation (Acknowledgement, ACK) message, to judge the number
According to packet whether transmission success.
Step 704, terminal judge whether the number of data packet transmission failure is less than N1If then returning to step
702, it is no to then follow the steps 705.
Specifically, terminal records the frequency n of data packet transmission failure, and every failure is primary, and n value is updated to n+1.
Step 705, terminal send the signaling of D2D communication pattern switching request to base station.
Step 706, base station are matched after receiving the signaling of D2D communication pattern switching request of terminal transmission for the terminal
D2D communication pattern 2 is set, and configures corresponding D2D communication resource pond for terminal.
The configuration information for the communication pattern that step 707, terminal are sent according to the base station received is switched to D2D communication mould
Formula 2 carries out D2D communication.
A kind of possible implementation that terminal sends D2D communication pattern switching request is introduced in citing below.
In the embodiment of the present application, terminal can send the signaling of D2D communication pattern switching request by PUCCH channel
To base station.
Table 1 gives the signal of Three models in PUCCH1 in long term evolution (Long Term Evolution, LTE).?
In LTE, PUCCH mode 1,1a and 1b send scheduling request for terminal and send confirmation (Acknowledgement, ACK)
Or negative acknowledgement (Negative Acknowledgement, NACK).Specifically, for example, PUCCH mode 1 carries 1 bit
Information sends scheduling request to base station for terminal；PUCCH mode 1a carries 1 bit information, sends 1 to base station for terminal
The ACK/NACK of bit；PUCCH mode 1b carries 2 bit informations, sends the ACK/NACK of 2 bits to base station for terminal.
Table 1
| PUCCH mode | Modulation system | The bit number of carrying | The information of carrying |
| 1 | It does not limit | It does not limit | Scheduling request |
| 1a | BPSK | 1 | 1 bit ACK/NACK |
| 1b | QPSK | 2 | 2 bit ACKs/NACK |
The embodiment of the present application sends the D2D communication pattern of 1 bit for terminal by increasing PUCCH mode 1c newly to base station
Switching request, PUCCH mode 1c are modulated using BPSK, and table 2 gives the signal of PUCCH mode 1,1a, 1b, 1c.
Table 2
| PUCCH mode | Modulation system | The bit number of carrying | The information of carrying |
| 1 | It does not limit | It does not limit | Scheduling request |
| 1a | BPSK | 1 | 1 bit ACK/NACK |
| 1b | QPSK | 2 | 2 bit ACKs/NACK |
| 1c | BPSK | 1 | D2D communication pattern switching request |
In a possible implementation, PUCCH mode 1, the schematic diagram of 1a, 1b and 1c resource distribution are as shown in Figure 8.
In a kind of possible implementation, base station can in ascending resource specific assigned be used for transmission PUCCH mode 1,1a,
The running time-frequency resource of 1b and 1c, in order to guarantee sufficient frequency diversity gain, the resource block of PUCCH is to being distributed in the two of upstream band
End, for example, in Fig. 8 be located at RB1- time slot 0 in 1/1a/1b/1c#2 and be located at RB NRB1/1a/1b/1c#2 in -2 time slots 1,
NRB is total radio bearer (Radio Bearer, the RB) number of upstream bandwidth.In fig. 8, base station be PUCCH mode 1,1a, 1b and
1c is assigned with 3 RB pairs, i.e. dash area in Fig. 8, and same RB centering is moved by different orthogonal sequence and circulation
Distinguish PUCCH mode 1,1a, 1b and 1c in position.It is low etc. excellent with the fast time delay of speed that upstream control signaling is transmitted using PUCCH
Point, the embodiment of the present application are switched for terminal to the D2D communication pattern that base station sends 1 bit by increasing PUCCH mode 1c newly
Request, can guarantee that the transmission speed of D2D communication pattern switching request is fast and time delay is lower, to guarantee that terminal executes in time
The switching of D2D communication pattern.
It is communicated for terminal to base station notice D2D in addition, the embodiment of the present application can also increase an ascending control information newly
Mode switch request, and newly-increased ascending control information can be sent by Physical Uplink Control Channel.
Based on the same inventive concept of D2D communication means shown in fig. 5, as shown in figure 9, the embodiment of the present application also provides
A kind of D2D communication device 900, including：
Communication unit 901, for carrying out D2D communication using the first D2D communication pattern, the first D2D communication pattern includes eventually
End obtains the first method of the D2D resource for D2D communication；
Processing unit 902 imposes a condition for judging whether to meet；
Transmission unit 903, for sending D2D communication pattern to base station when processing unit 902 determines to impose a condition and meet
Switching request；
Receiving unit 904, for receiving the D2D communication pattern switching command of base station return；
Communication unit 901 is also used to the D2D communication pattern switching command returned according to receiving unit 904, using second
D2D communication pattern carries out D2D communication, and the 2nd D2D communication pattern includes the second of the D2D resource that terminal is obtained for D2D communication
Mode.
Optionally, the first D2D communication pattern be D2D communication device 900 in the D2D resource pool that base station notifies according to base station
The D2D resource of distribution is communicated, and the 2nd D2D communication pattern is D2D communication device 900 in the D2D resource pool that base station notifies
D2D resource of the autonomous selection for D2D communication；
Above-mentioned setting condition comprises at least one of the following：
Communication unit 901 is greater than the patient highest transmission of device using the propagation delay time that the first D2D communication pattern generates
Time delay；
The number of transmission unit 903 to base station transmission resource scheduling request is more than the first given threshold, and does not receive base
It stands as the D2D resource used in the first D2D communication pattern of the distribution of D2D communication device 900.
Optionally, the first D2D communication pattern is that D2D communication device 900 independently selects in the D2D resource pool that base station notifies
For the D2D resource of D2D communication, the 2nd D2D communication pattern is that D2D communication device 900 is pressed in the D2D resource pool that base station notifies
It is communicated according to the D2D resource of base station distribution；
Above-mentioned setting condition comprises at least one of the following：
The number that transmission unit 903 continuously transmits identical data failure is more than the second given threshold；
The continuous time that processing unit 902 listens to the D2D resource pool of base station notice is more than third given threshold, and is had not been obtained
Idle D2D resource；
The read-around ratio that processing unit 902 listens to the D2D resource pool of base station notice is more than the 4th given threshold, and is had not been obtained
Idle D2D resource；
Communication unit 901 carries out D2D communication service quality obtained using the 2nd D2D communication pattern and is unable to satisfy device
To the service quality of D2D business need.
Optionally, transmission unit 903 is used for：
Increase PUCCH mode in the Physical Uplink Control Channel PUCCH of transmission, includes in the increased PUCCH mode of institute
The information of D2D communication pattern switching request.
Based on the same inventive concept of D2D communication means shown in fig. 5, as shown in Figure 10, the embodiment of the present application is also provided
A kind of D2D communication device 1000, including：
Receiving unit 1001, for receiving the D2D communication pattern switching request of terminal transmission；
Transmission unit 1002, for returning to D2D communication pattern switching command to terminal, D2D communication pattern switching command is used
D2D communication is carried out by being switched to the 2nd D2D communication pattern using the first D2D communication pattern in instruction terminal；
First D2D communication pattern includes the first method for the D2D resource that terminal is obtained for D2D communication, the 2nd D2D communication
It include the second method for the D2D resource that terminal is obtained for D2D communication in mode.
Optionally, transmission unit 1002 is also used to：
Before the D2D communication pattern switching request that receiving unit 1001 receives that terminal is sent, the first control is sent to terminal
Signaling processed indicates the first D2D resource pool, includes that carry out D2D using the first D2D communication pattern logical for terminal in the first D2D resource pool
Letter allow using D2D resource；And
After the D2D communication pattern switching request that receiving unit 1001 receives that terminal is sent, the second control is sent to terminal
Signaling processed indicates the 2nd D2D resource pool, includes that carry out D2D using the 2nd D2D communication pattern logical for terminal in the 2nd D2D resource pool
Letter allow using D2D resource.
Optionally, transmission unit 1002 is also used to：
Before the D2D communication pattern switching request that receiving unit 1001 receives that terminal is sent, third control is sent to terminal
Signaling processed indicates to impose a condition, the transmission to impose a condition for terminal triggering mode switch request.
Based on the same inventive concept with D2D communication means shown in fig. 5, as shown in figure 11, the embodiment of the present application is also mentioned
For a kind of D2D communication device 1100, which can be used for executing method shown in fig. 5.Wherein, D2D communication dress
It sets 1100 and includes transceiver 1101, processor 1102, memory 1103 and bus 1104, processor 1102 and memory 1103
Between be connected by bus 1104, processor 1102 is used to execute code in memory 1103, and when code is performed, this is held
Exercise processor 1102 executes D2D communication means shown in fig. 5.
Processor 1102 can be central processing unit (central processing unit, CPU), network processing unit
The combination of (network processor, NP) or CPU and NP.
Processor 1102 can further include hardware chip.Above-mentioned hardware chip can be specific integrated circuit
(application-specific integrated circuit, ASIC), programmable logic device (programmable
Logic device, PLD) or combinations thereof.Above-mentioned PLD can be Complex Programmable Logic Devices (complex
Programmable logic device, CPLD), field programmable gate array (field-programmable gate
Array, FPGA), Universal Array Logic (generic array logic, GAL) or any combination thereof.
Memory 1103 may include volatile memory (volatile memory), such as random access memory
(random-access memory, RAM)；Memory 1103 also may include nonvolatile memory (non-volatile
), such as flash memory (flash memory), hard disk (hard disk drive, HDD) or solid state hard disk memory
(solid-state drive, SSD)；Memory 1103 can also include the combination of the memory of mentioned kind.
Based on the same inventive concept with D2D communication means shown in fig. 5, as shown in figure 12, the embodiment of the present application is also mentioned
For a kind of D2D communication device 1200, which can be used for executing method shown in fig. 5.Wherein, D2D communication dress
It sets 1200 and includes transceiver 1201, processor 1202, memory 1203 and bus 1204, processor 1202 and memory 1203
Between be connected by bus 1204, processor 1202 is used to execute code in memory 1203, and when code is performed, this is held
Exercise processor 1202 executes D2D communication means shown in fig. 5.
Processor 1202 can be central processing unit (central processing unit, CPU), network processing unit
The combination of (network processor, NP) or CPU and NP.
Processor 1202 can further include hardware chip.Above-mentioned hardware chip can be specific integrated circuit
(application-specific integrated circuit, ASIC), programmable logic device (programmable
Logic device, PLD) or combinations thereof.Above-mentioned PLD can be Complex Programmable Logic Devices (complex
Programmable logic device, CPLD), field programmable gate array (field-programmable gate
Array, FPGA), Universal Array Logic (generic array logic, GAL) or any combination thereof.
Memory 1203 may include volatile memory (volatile memory), such as random access memory
(random-access memory, RAM)；Memory 1203 also may include nonvolatile memory (non-volatile
), such as flash memory (flash memory), hard disk (hard disk drive, HDD) or solid state hard disk memory
(solid-state drive, SSD)；Memory 1203 can also include the combination of the memory of mentioned kind.
The embodiment of the present application provides a kind of computer storage medium, for storing computer program, the computer program
Including for executing D2D communication means shown in fig. 5.
The embodiment of the present application provides a kind of computer program product comprising instruction, when run on a computer,
So that computer executes D2D communication means shown in fig. 5.
It should be understood by those skilled in the art that, embodiments herein can provide as method, system or computer program
Product.Therefore, complete hardware embodiment, complete software embodiment or reality combining software and hardware aspects can be used in the application
Apply the form of example.Moreover, it wherein includes the computer of computer usable program code that the application, which can be used in one or more,
The computer program implemented in usable storage medium (including but not limited to magnetic disk storage, CD-ROM, optical memory etc.) produces
The form of product.
The application is referring to method, the process of equipment (system) and computer program product according to the embodiment of the present application
Figure and/or block diagram describe.It should be understood that every one stream in flowchart and/or the block diagram can be realized by computer program instructions
The combination of process and/or box in journey and/or box and flowchart and/or the block diagram.It can provide these computer programs
Instruct the processor of general purpose computer, special purpose computer, Embedded Processor or other programmable data processing devices to produce
A raw machine, so that being generated by the instruction that computer or the processor of other programmable data processing devices execute for real
The device for the function of being specified in present one or more flows of the flowchart and/or one or more blocks of the block diagram.
These computer program instructions, which may also be stored in, is able to guide computer or other programmable data processing devices with spy
Determine in the computer-readable memory that mode works, so that it includes referring to that instruction stored in the computer readable memory, which generates,
Enable the manufacture of device, the command device realize in one box of one or more flows of the flowchart and/or block diagram or
The function of being specified in multiple boxes.
These computer program instructions also can be loaded onto a computer or other programmable data processing device, so that counting
Series of operation steps are executed on calculation machine or other programmable devices to generate computer implemented processing, thus in computer or
The instruction executed on other programmable devices is provided for realizing in one or more flows of the flowchart and/or block diagram one
The step of function of being specified in a box or multiple boxes.
Although the preferred embodiment of the application has been described, it is created once a person skilled in the art knows basic
Property concept, then additional changes and modifications may be made to these embodiments.So it includes excellent that the following claims are intended to be interpreted as
It selects embodiment and falls into all change and modification of the application range.
Obviously, those skilled in the art can carry out various modification and variations without departing from this Shen to the embodiment of the present application
Please embodiment spirit and scope.In this way, if these modifications and variations of the embodiment of the present application belong to the claim of this application
And its within the scope of equivalent technologies, then the application is also intended to include these modifications and variations.
Claims (14)
1. a kind of device-to-device D2D communication means, which is characterized in that including：
Terminal carries out D2D communication using the first D2D communication pattern, and the first D2D communication pattern includes that the terminal obtains use
In the first method of the D2D resource of D2D communication；
Meet if imposing a condition, the terminal sends D2D communication pattern switching request to base station；
The terminal receives the D2D communication pattern switching command that the base station returns, according to the D2D communication pattern switching command
D2D communication is carried out using the 2nd D2D communication pattern, the 2nd D2D communication pattern includes that terminal acquisition is communicated for D2D
The second method of D2D resource.
2. the method as described in claim 1, which is characterized in that the first D2D communication pattern is that the terminal is logical in base station
It is communicated in the D2D resource pool known according to the D2D resource that the base station is distributed, the 2nd D2D communication pattern is the end
The D2D resource that independently selection is communicated for D2D in the D2D resource pool that the base station notifies is held, the D2D resource pool is base station
The running time-frequency resource set for D2D communication of configuration；
The setting condition comprises at least one of the following：
The terminal is greater than the patient highest transmission of the terminal using the propagation delay time that the first D2D communication pattern generates
Time delay；
The number of the terminal to base station transmission resource scheduling request is more than the first given threshold, and does not receive the base
It stands as the D2D resource used in the first D2D communication pattern of the terminal distribution.
3. the method as described in claim 1, which is characterized in that the first D2D communication pattern is that the terminal is logical in base station
Independently D2D resource of the selection for D2D communication, the 2nd D2D communication pattern are the terminal in base in the D2D resource pool known
Stand notice D2D resource pool according to the base station distribution D2D resource communicated；
The setting condition comprises at least one of the following：
The number that the terminal continuously transmits identical data failure is more than the second given threshold；
The continuous time that the terminal listens to the D2D resource pool of the base station notice is more than third given threshold, and sky has not been obtained
Not busy D2D resource；
The read-around ratio that the terminal listens to the D2D resource pool of the base station notice is more than the 4th given threshold, and sky has not been obtained
Not busy D2D resource；
The terminal carries out D2D communication service quality obtained using the 2nd D2D communication pattern and is unable to satisfy the end
Hold the service quality to D2D business need.
4. method as claimed in claim 1,2 or 3, which is characterized in that the terminal is wrapped to base station sending mode switching request
It includes：
The terminal increases PUCCH mode in the Physical Uplink Control Channel PUCCH of transmission, in increased PUCCH mode
Information including the D2D communication pattern switching request.
5. a kind of device-to-device D2D communication means, which is characterized in that including：
Base station receives the D2D communication pattern switching request that terminal is sent；
The base station returns to D2D communication pattern switching command to the terminal, and the D2D communication pattern switching command is used to indicate
The terminal carries out D2D communication by being switched to the 2nd D2D communication pattern using the first D2D communication pattern；
The first D2D communication pattern includes the first method for the D2D resource that the terminal is obtained for D2D communication, and described the
It include the second method for the D2D resource that terminal is obtained for D2D communication in two D2D communication patterns.
6. method as claimed in claim 5, which is characterized in that the base station receives the D2D communication pattern switching that terminal is sent
Before request, further include：
The base station sends the first control signaling to indicate the first D2D resource pool, in the first D2D resource pool to the terminal
Including the terminal using the first D2D communication pattern carry out D2D communication allow using D2D resource；
After base station receives the D2D communication pattern switching request that terminal is sent, further include：
The base station sends the second control signaling to indicate the 2nd D2D resource pool, in the 2nd D2D resource pool to the terminal
Including the terminal using the 2nd D2D communication pattern carry out D2D communication allow using D2D resource.
7. such as method described in claim 5 or 6, which is characterized in that receive the D2D communication pattern switching that terminal is sent in base station
Before request, further include：
The base station sends third control signaling to the terminal to indicate to impose a condition, and described impose a condition is used for the terminal
Trigger the transmission of the mode switch request.
8. a kind of device-to-device D2D communication device, which is characterized in that including：
Communication unit, for carrying out D2D communication using the first D2D communication pattern, the first D2D communication pattern includes the end
End obtains the first method of the D2D resource for D2D communication；
Processing unit imposes a condition for judging whether to meet；
Transmission unit, for sending the switching of D2D communication pattern to base station and asking when the processing unit determines to impose a condition and meet
It asks；
Receiving unit, the D2D communication pattern switching command returned for receiving the base station；
The communication unit is also used to the D2D communication pattern switching command returned according to the receiving unit, using the 2nd D2D
Communication pattern carries out D2D communication, and the 2nd D2D communication pattern includes the second of the D2D resource that terminal is obtained for D2D communication
Mode.
9. device as claimed in claim 8, which is characterized in that the first D2D communication pattern is that described device is logical in base station
It is communicated in the D2D resource pool known according to the D2D resource that the base station is distributed, the 2nd D2D communication pattern is the dress
Set the D2D resource that independently selection is communicated for D2D in the D2D resource pool of base station notice；
The setting condition comprises at least one of the following：
The communication unit is greater than the patient highest of described device using the propagation delay time that the first D2D communication pattern generates
Propagation delay time；
The number of the transmission unit to base station transmission resource scheduling request is more than the first given threshold, and does not receive institute
State the D2D resource used in the first D2D communication pattern that base station is described device distribution.
10. device as claimed in claim 8, which is characterized in that the first D2D communication pattern is that described device is logical in base station
Independently D2D resource of the selection for D2D communication, the 2nd D2D communication pattern are described device in base in the D2D resource pool known
Stand notice D2D resource pool according to the base station distribution D2D resource communicated；
The setting condition comprises at least one of the following：
The number that the transmission unit continuously transmits identical data failure is more than the second given threshold；
The continuous time that the processing unit listens to the D2D resource pool of the base station notice is more than third given threshold, and is not obtained
Take idle D2D resource；
The read-around ratio that the processing unit listens to the D2D resource pool of the base station notice is more than the 4th given threshold, and is not obtained
Take idle D2D resource；
The communication unit carries out D2D communication service quality obtained using the 2nd D2D communication pattern and is unable to satisfy institute
Device is stated to the service quality of D2D business need.
11. the device as described in claim 8,9 or 10, which is characterized in that the transmission unit is used for：
Increase PUCCH mode in the Physical Uplink Control Channel PUCCH of transmission, includes described in the increased PUCCH mode of institute
The information of D2D communication pattern switching request.
12. a kind of device-to-device D2D communication device, which is characterized in that including：
Receiving unit, for receiving the D2D communication pattern switching request of terminal transmission；
Transmission unit, for returning to D2D communication pattern switching command to the terminal, the D2D communication pattern switching command is used
D2D communication is carried out by being switched to the 2nd D2D communication pattern using the first D2D communication pattern in the instruction terminal；
The first D2D communication pattern includes the first method for the D2D resource that the terminal is obtained for D2D communication, and described the
It include the second method for the D2D resource that terminal is obtained for D2D communication in two D2D communication patterns.
13. device as claimed in claim 12, which is characterized in that the transmission unit is also used to：
Before the D2D communication pattern switching request that the receiving unit receives that terminal is sent, the first control is sent to the terminal
Signaling processed indicates the first D2D resource pool, includes the terminal uses the first D2D communication pattern in the first D2D resource pool
Carry out D2D communication allow using D2D resource；And
After the D2D communication pattern switching request that the receiving unit receives that terminal is sent, the second control is sent to the terminal
Signaling processed indicates the 2nd D2D resource pool, includes the terminal uses the 2nd D2D communication pattern in the 2nd D2D resource pool
Carry out D2D communication allow using D2D resource.
14. device as described in claim 12 or 13, which is characterized in that the transmission unit is also used to：
Before the D2D communication pattern switching request that the receiving unit receives that terminal is sent, third control is sent to the terminal
Signaling processed indicates to impose a condition, and described impose a condition triggers the transmission of the mode switch request for the terminal.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710223562.6A CN108924892A (en) | 2017-04-07 | 2017-04-07 | A kind of D2D communication means and device |
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| CN201710223562.6A CN108924892A (en) | 2017-04-07 | 2017-04-07 | A kind of D2D communication means and device |
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Application publication date: 20181130 |