CN110061806A - A kind of V2X unicast communication method, terminal device and system - Google Patents
A kind of V2X unicast communication method, terminal device and system Download PDFInfo
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- CN110061806A CN110061806A CN201811467460.XA CN201811467460A CN110061806A CN 110061806 A CN110061806 A CN 110061806A CN 201811467460 A CN201811467460 A CN 201811467460A CN 110061806 A CN110061806 A CN 110061806A
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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
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
- H04L1/0002—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission rate
- H04L1/0003—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission rate by switching between different modulation schemes
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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
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
- H04L1/0009—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the channel coding
-
- 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
- H04W4/30—Services specially adapted for particular environments, situations or purposes
- H04W4/40—Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P]
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- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Quality & Reliability (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
The application discloses a kind of V2X unicast communication method, terminal device and system.Realize communication between terminal sending terminal and receiving, the described method comprises the following steps: transmission terminal, which sends instruction information in first resource position, indicates that pilot signal exists；In Secondary resource position pilot signal transmitted；It receives terminal and pilot signal is received according to instruction information, pilot signal is measured, channel state information is generated, sent in the 4th resource location；It receives terminal and sends scheduling information in information resources position, indicate the 4th resource location；It sends terminal and the channel state information is received according to scheduling information, determine Modulation and Coding Scheme.A kind of mobile terminal is also disclosed in the application, is used as and sends terminal or reception terminal；The application also proposes a kind of mobile communication system, includes mobile terminal described in the application any one embodiment.The scheme of the application is used for car networking unicast communication, effectively establishes service connection, raising signal delivery quality between transmitting terminal and receiving end.
Description
Technical field
This application involves mobile communication field more particularly to a kind of V2X unicast communication methods, terminal device and system.
Background technique
Wherein V2V (Che-Che Tongxin) is the core of the V2X communication technology.But the D2D/V2X technology in 4G standard at present
Be the transmission mode of broadcast/group broadcast, be not carried out unicast D2D/V2X transmission mode, also without using MIMO, link circuit self-adapting,
The transmission technology that HARQ etc. is generallyd use in unicast transmission.But the development for the 5G stage mobile communication that faces the future, broadcast mode
D2D/V2X technology can no longer meet needs, 5G V2V technology will be answered by shared expand between vehicle vehicle of simple sensor
Answer the One-to-one communication of formula, i.e. unicast D2D/V2X technology.
There are a series of new technical problems for unicast D2D mode, especially in control channel design, can not continue to use original
Cellular system or the design of broadcast and multicast D2D mode.In cell mobile communication systems, only base station has " multithread " to send energy
Power, and terminal can only send data to a base station.And broadcast in multicast D2D system, transmitting terminal can only send a circuit-switched data,
And it is broadcasted by Sidelink SA (Scheduling Assignment) resource used and format information.In 4G
Broadcast and multicast D2D mode in, what all receiving ends received is all identical data, and transmitting terminal is that " single stream " is sent, and is accounted for
With a resource, a kind of transformat is used.And unicast communication, transmitting terminal need while sending different data to multiple terminals,
Similar to the downlink of cellular system.Therefore during the mobile terminal direct communication of unicast, how multiple mobile terminals it
Between establish the unicast communication of reliable multi-to-multi, be need to solve and technical problem.
Summary of the invention
The present invention proposes V2X unicast communication method, terminal device and system, solve existing system cannot send terminal and
Receive the problem of carrying out reliable unicast communication between terminal.
The embodiment of the present application proposes a kind of V2X unicast communication method, and communication is realized between terminal sending terminal and receiving,
The following steps are included:
It sends terminal and sends instruction information in first resource position, indicate that pilot signal exists；
The transmission terminal sends the pilot signal in Secondary resource position；
Terminal is received according to the instruction information, receives the pilot signal；
The reception terminal measures the pilot signal, generates channel state information, sends out in the 4th resource location
It send；
The reception terminal sends scheduling information in information resources position, indicates the 4th resource location；
The transmission terminal receives the channel state information, determines Modulation and Coding Scheme according to the scheduling information.
Preferably, the first resource position is only occupied by a transmission terminal when sending instruction information.
Preferably, the Secondary resource position is fixed.
Preferably, the information resources position receives terminal by least one and occupies when being used for scheduling information.
Preferably, the information resources position is also used to the transmission terminal and/or the business datum for receiving terminal
Scheduling information.
As the embodiment of the application optimization, the instruction information also includes to send terminal iidentification, receive terminal iidentification；Institute
Stating and receiving the quantity of terminal is at least one.
As the embodiment of the application optimization, the scheduling information also includes to receive terminal iidentification, send terminal iidentification.
As the embodiment of the application optimization, the pilot signal mark scrambling for sending terminal.
Embodiments herein also proposes a kind of mobile terminal, which is characterized in that it is real to be used as the application any one method
It applies the example transmission terminal or receives terminal.
The transmission terminal, for sending instruction information in first resource position, being sent in scheduled Secondary resource position
Pilot signal；It is also used to receive scheduling information in information resources position, be connect further according to the scheduling information in the 4th resource location
Collection of letters channel state information determines Modulation and Coding Scheme；The instruction information includes to send terminal iidentification, at least one reception terminal
Mark.
The reception terminal is received for receiving instruction information in first resource position in scheduled Secondary resource position
Pilot signal；Measurement pilot signals generate channel state information；It is also used to send scheduling information in information resources position, it is described
Scheduling information includes the 4th resource location, and sends channel state information in the 4th resource location.
The embodiment of the present application also proposes a kind of mobile communication system, comprising mobile whole described in the application any one embodiment
End.Wherein, at least one mobile terminal is used as the launch terminal；At least one mobile terminal is used as the reception terminal.
The embodiment of the present application use at least one above-mentioned technical solution can reach it is following the utility model has the advantages that
Realize unicast communication, receiving end is detected and fed back to the channel quality of transmitting terminal, the technical side of the application
Case can support mobile terminal to another mobile terminal transmission pilot frequency information and according to feedback adjustment Modulation and Coding Scheme, guarantee number
According to correct transmission.The scheme of the application is used for car networking unicast communication, effectively establishes between transmitting terminal and multiple receiving ends
Unicast service connection, improve signal delivery quality.
Detailed description of the invention
The drawings described herein are used to provide a further understanding of the present application, constitutes part of this application, this Shen
Illustrative embodiments and their description please are not constituted an undue limitation on the present application for explaining the application.In the accompanying drawings:
Fig. 1 is resource pool schematic diagram；
Fig. 2 is the flow embodiment of the application method；
Fig. 3 is the application mobile terminal and mobile communication system embodiment schematic diagram.
Specific embodiment
To keep the purposes, technical schemes and advantages of the application clearer, below in conjunction with the application specific embodiment and
Technical scheme is clearly and completely described in corresponding attached drawing.Obviously, described embodiment is only the application one
Section Example, instead of all the embodiments.Based on the embodiment in the application, those of ordinary skill in the art are not doing
Every other embodiment obtained under the premise of creative work out, shall fall in the protection scope of this application.
Below in conjunction with attached drawing, the technical scheme provided by various embodiments of the present application will be described in detail.
Fig. 1 is the resource pool schematic diagram that the present invention defines.In the frame format of V2X communication channel, resource pool is distinguished.Every
In one setting period, include control resource pool, data resource pond；In control resource pool, public control money is further included
Source, dedicated control resource.
The data resource pond is also used to transmit pilot signal (the application for transmitting business datum between mobile terminal
In be expressed as V-RS).Present invention introduces the pilot signal V-RS of V2X unicast communication, for measuring the channel between mobile terminal
State.It is sent in bandwidth resources of the distribution for unicast communication business datum.The time-domain position of V-RS is fixed, for example is accounted for
With one or two symbols.It is pectination on frequency domain, one of special case is that the transmission data bandwidth of unicast communication is complete
Frequency band is sent.Pilot signal is scrambled with transmitting terminal ID.
It should be noted that indicating signal the location of in time domain and frequency domain with " resource location " in this application.
The resource location may appear as discrete or continuous in time domain and frequency domain, and technology of this and modulated signal transmission has
It closes, is not specifically limited here.
The public control resource refers to the control resource that any one mobile terminal can occupy, and at one
Carving can only be occupied by a terminal device.In this application, the public control resource refers to for transmission between mobile terminals
Show information (being expressed as SCI, Sidelink Control Information in the application), indicates that there are the pilot signals.
SCI also triggers other mobile terminal reporting channel state informations.Any one mobile terminal seizes the public control resource, just
Indicate that the mobile terminal sends V-RS.
The dedicated control resource refers to mobile terminal for sending the resource of scheduling information, specifically, scheduling information packet
Include the scheduling information for the scheduling information of channel state information (being expressed as V-CSI in the application) and for business datum.Two
Kind scheduling information is multiplexed in dedicated control resource pool.The terminal device for receiving scheduling information, to the specific interior of scheduling information
Appearance is identified.When scheduling information is for V-CSI, position of the V-CSI in data resource pond is indicated.Terminal device issues
The occupied resource location of V-CSI information necessarily has certain time delay compared with the resource location that V-RS is occupied.Generally,
The time delay having time upper limit.
Fig. 2 is the flow embodiment of the application method.
The embodiment of the present application proposes a kind of V2X unicast communication method, and communication is realized between terminal sending terminal and receiving,
The following steps are included:
Step 10 sends terminal in first resource position transmission instruction information (SCI), indicates that pilot signal exists；It sends
Terminal, which is robbed, to be accounted for this public resource and means that V-RS to be sent, in instruction information, comprising sending terminal iidentification, on needs
The reception terminal iidentification of V-CSI information is reported, reports V-CSI information to indicate to receive terminal accordingly to terminal is sent.
Preferably, the first resource position is only occupied by a transmission terminal when sending instruction information.
As the embodiment of the application optimization, the instruction information also includes to send terminal iidentification, receive terminal iidentification；Institute
Stating and receiving the quantity of terminal is at least one.
As the embodiment of the application optimization, the pilot signal is scrambled with terminal iidentification is sent.
Step 20, the transmission terminal send the pilot signal in Secondary resource position；Terminal is received according to the finger
Show information, receives the pilot signal；
In step 20, the reception terminal receives the pilot signal in the first resource position first.By institute
First resource position is stated in common pool, any reception terminal can listen to the finger to the signal of the first resource position
Show information.
When the instruction information includes the reception terminal iidentification, corresponding reception terminal can identify the instruction
Information is for driving it to receive the pilot signal in the Secondary resource position.
The Secondary resource position is in data resource pond.Preferably, the Secondary resource position is fixed.
For example, when in SCI comprising receiving terminal iidentification, it, can be in fixation after the reception terminal searching to SCI identified
V-RS is received on position.
Step 30, the reception terminal measure the pilot signal, channel state information are generated, in the 4th resource
Position is sent；
In step 30, the 4th resource location is in data resource pond.Preferably, the 4th resource location and institute
It is preset for stating the delay between Secondary resource position.
The channel state information reported for guarantee can be received accurately, and fixed low order MCS grade can be used, such as
1/3 code rate of QPAK；It does not need to retransmit.
Step 40, the reception terminal send scheduling information in information resources position, indicate the 4th resource location；
The reception terminal with the scheduling information notify the launch terminal how receiving channel state information, scheduling letter
The information for indicating the 4th resource location, such as frequency parameter, time parameter, character in data resource pond are included at least in breath
Parameter or the delay parameter relative to RS signal etc..
Preferably, the information resources position receives terminal by least one and occupies when being used for scheduling information.Once connecing
It receives terminal and needs to send corresponding V-CSI, the scheduling information (CSI SA) that terminal just sends channel state information is received, for referring to
Show the resource location for sending channel state information.
Preferably, the scheduling information also includes to receive terminal iidentification, send terminal iidentification.At this point, corresponding transmission is eventually
End can identify the scheduling information for notifying it to receive the letter that corresponding reception terminal generates in the 4th resource location
Channel state information.
Preferably, the information resources position is also used to the transmission terminal and/or the business datum for receiving terminal
Scheduling information.For example, also applying the dedicated control when the reception terminal sends business datum to the transmission terminal
Resource pool.The content that sending terminal can at least judge that the reception terminal is sent according to load is for channel state information
Scheduling information (CSI SA) or the scheduling information (SA) for being used for business datum.
Step 50, the transmission terminal receive the channel state information, determine modulating-coding according to the scheduling information
Scheme.
In step 50, transmission terminal can identify the scheduling information for notifying it in the 4th resource location first
Receiving channel state information.
After channel state information is received by transmission terminal, encoding scheme is determined according to the channel state information, for example, logical
MCS grade is crossed to define.
Preferably, the terminal that sends determines the scheduling information for being used for business datum also according to the channel state information
Position.
Fig. 3 is the application mobile terminal and mobile communication system embodiment schematic diagram.
Embodiments herein also proposes a kind of mobile terminal, which is characterized in that it is real to be used as the application any one method
It applies the example transmission terminal or receives terminal.
The transmission terminal TX1, for sending instruction information SCI, in scheduled Secondary resource position in first resource position
Set pilot signal transmitted V-RS；It is also used to receive scheduling information SA in information resources position, further according to the scheduling information the
Four resource location receiving channel state information V-CSI, Modulation and Coding Scheme is determined；The instruction information includes to send terminal mark
Know, at least one receives terminal iidentification.
For example, user TX1, which is robbed, accounts for public control resource at the T1 moment, new control information is sent, instruction has pilot tone letter
The presence of number V-RS, the control information include the ID identification information (such as TX1) for sending terminal and multiple ID for receiving terminal
Identification information (such as RX1, RX2 ..., RXn ...) is reported to indicate to receive terminal.ID is that the user of TX1 receives
After receive the V-CSI that reports of terminal RXn, for adjusting to the MCS grade and corresponding data dispatch resource of RX n
Position.
The characteristics of pilot signal, such as may is that the time location of the pilot signal is a symbol or two
Symbol；The frequency domain position of the pilot signal is the Whole frequency band transmission for occupying car networking communication；Between the frequency domain pattern of the pilot signal
It is sent every certain frequency interval, special circumstances are that the frequency domain position of Whole frequency band is all sent；Pilot signal transmission Termination ID
I.e. TX1 is scrambled.
The reception terminal RX1 connects for receiving instruction information in first resource position in scheduled Secondary resource position
Receive pilot signal；Measurement pilot signals generate channel state information；It is also used to send scheduling information, institute in information resources position
Stating scheduling information includes the 4th resource location, and sends channel state information in the 4th resource location.
For example, user RX1 is to receive terminal, control information is detected in common pool, is looked on a corresponding position
Channel measurement is carried out to V-RS, the channel state information V-CSI 1 with TX1 is obtained, is required according to reporting time delay, preempting resources hair
Send the scheduling information CSI SA1 for channel state information the data of scheduling are used to arrange to send in data resource pond to TX1
It include the ID for the ID, that is, TX1 for receiving Termination ID, that is, RX1 and sending terminal to the channel state information of TX1, in this CSI SA1.
The embodiment of the present application also proposes a kind of V2X mobile communication system, comprising moving described in the application any one embodiment
Dynamic terminal.Wherein, at least one mobile terminal is used as the launch terminal TX1；At least one mobile terminal is used as the reception
Terminal RX1.The transmission terminal sends instruction information in common pool, indicates the presence of pilot tone, comprising sending terminal mark
Know information and needs the reception terminal identification information of feeding back channel state information；Preferably, it is also wrapped in the instruction information
Resource location P2 containing pilot tone, such as the time-domain symbol position in data resource pond.The transmitting terminal is accorded in the time domain of instruction
Number position pilot signal transmitted.After reception terminal detects the instruction information, delayed when no more than fixed slot time,
Scheduling information is sent in dedicated control resource pool, is used to indicate the occupied time-frequency domain money of content of the channel state information of feedback
Source position P4, it receives terminal iidentification and sends the information such as terminal iidentification.
It should also be noted that, the terms "include", "comprise" or its any other variant are intended to nonexcludability
It include so that the process, method, commodity or the equipment that include a series of elements not only include those elements, but also to wrap
Include other elements that are not explicitly listed, or further include for this process, method, commodity or equipment intrinsic want
Element.In the absence of more restrictions, the element limited by sentence "including a ...", it is not excluded that including described want
There is also other identical elements in the process, method of element, commodity or equipment.
The above description is only an example of the present application, is not intended to limit this application.For those skilled in the art
For, various changes and changes are possible in this application.All any modifications made within the spirit and principles of the present application are equal
Replacement, improvement etc., should be included within the scope of the claims of this application.
Claims (10)
1. a kind of V2X unicast communication method, communication is realized between terminal sending terminal and receiving, which is characterized in that including with
Lower step:
It sends terminal and sends instruction information in first resource position, indicate that pilot signal exists；
The transmission terminal sends the pilot signal in Secondary resource position；
Terminal is received according to the instruction information, receives the pilot signal；
The reception terminal measures the pilot signal, generates channel state information, sends in the 4th resource location；
The reception terminal sends scheduling information in information resources position, indicates the 4th resource location；
The transmission terminal receives the channel state information, determines Modulation and Coding Scheme according to the scheduling information.
2. method as described in claim 1, which is characterized in that the first resource position is when sending instruction information, only by one
A transmission terminal occupies.
3. method as described in claim 1, which is characterized in that the Secondary resource position is fixed.
4. method as described in claim 1, which is characterized in that the information resources position is when being used for scheduling information, by least
One reception terminal occupies.
5. method as described in claim 1, which is characterized in that the instruction information also includes to send terminal iidentification, receive terminal
Mark；The quantity for receiving terminal is at least one.
6. method as described in claim 1, which is characterized in that the scheduling information also includes to receive terminal iidentification, send terminal
Mark.
7. method as described in claim 1, which is characterized in that the pilot signal mark scrambling for sending terminal.
8. method as described in claim 1, which is characterized in that the information resources position, be also used to the transmission terminal and/or
The scheduling information of the business datum for receiving terminal.
9. a kind of mobile terminal, which is characterized in that be used as transmission terminal or reception described in claim 1~8 any one method
Terminal；
The transmission terminal, for sending instruction information in first resource position, sending pilot tone in scheduled Secondary resource position
Signal；It is also used to receive scheduling information in information resources position, receives and believe in the 4th resource location further according to the scheduling information
Channel state information determines Modulation and Coding Scheme；The instruction information includes to send terminal iidentification, at least one reception terminal mark
Know.
The reception terminal receives pilot tone in scheduled Secondary resource position for receiving instruction information in first resource position
Signal；Measurement pilot signals generate channel state information；It is also used to send scheduling information, the scheduling in information resources position
Information includes the 4th resource location, and sends channel state information in the 4th resource location.
10. a kind of mobile communication system, which is characterized in that include mobile terminal described in claim 9, which is characterized in that at least
One mobile terminal is used as the launch terminal；At least one mobile terminal is used as the reception terminal.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811467460.XA CN110061806A (en) | 2018-12-03 | 2018-12-03 | A kind of V2X unicast communication method, terminal device and system |
| PCT/CN2019/071429 WO2020113774A1 (en) | 2018-12-03 | 2019-01-11 | V2x unicast communication method, terminal device and system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811467460.XA CN110061806A (en) | 2018-12-03 | 2018-12-03 | A kind of V2X unicast communication method, terminal device and system |
Publications (1)
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| CN110061806A true CN110061806A (en) | 2019-07-26 |
Family
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| CN201811467460.XA Pending CN110061806A (en) | 2018-12-03 | 2018-12-03 | A kind of V2X unicast communication method, terminal device and system |
Country Status (2)
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| CN (1) | CN110061806A (en) |
| WO (1) | WO2020113774A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112532365A (en) * | 2020-11-17 | 2021-03-19 | 广州技象科技有限公司 | Multicast user scheduling selection method, device, system and storage medium |
| WO2021159512A1 (en) * | 2020-02-14 | 2021-08-19 | 华为技术有限公司 | Control information transmission method and apparatus |
| CN113542129A (en) * | 2021-07-15 | 2021-10-22 | 无锡思朗电子科技有限公司 | Single transmission method using signal linked list |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111698662B (en) * | 2020-06-15 | 2021-10-29 | 西安电子科技大学 | V2X communication method under MIMO system in high network load scene |
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| US20130322276A1 (en) * | 2012-05-31 | 2013-12-05 | Interdigital Patent Holdings, Inc. | Device-to-device (d2d) link adaptation |
| CN108631968A (en) * | 2017-03-20 | 2018-10-09 | 华为技术有限公司 | A kind of determination method and device of data feedback resource |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2021159512A1 (en) * | 2020-02-14 | 2021-08-19 | 华为技术有限公司 | Control information transmission method and apparatus |
| CN112532365A (en) * | 2020-11-17 | 2021-03-19 | 广州技象科技有限公司 | Multicast user scheduling selection method, device, system and storage medium |
| CN112532365B (en) * | 2020-11-17 | 2021-07-13 | 广州技象科技有限公司 | Multicast user scheduling selection method, device, system and storage medium |
| CN113542129A (en) * | 2021-07-15 | 2021-10-22 | 无锡思朗电子科技有限公司 | Single transmission method using signal linked list |
| CN113542129B (en) * | 2021-07-15 | 2023-01-24 | 无锡思朗电子科技有限公司 | Single transmission method using signal linked list |
Also Published As
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| WO2020113774A1 (en) | 2020-06-11 |
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Application publication date: 20190726 |