CN104301075B - D2D communication means, base station and system - Google Patents
D2D communication means, base station and system Download PDFInfo
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- CN104301075B CN104301075B CN201310303747.XA CN201310303747A CN104301075B CN 104301075 B CN104301075 B CN 104301075B CN 201310303747 A CN201310303747 A CN 201310303747A CN 104301075 B CN104301075 B CN 104301075B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/24—Radio transmission systems, i.e. using radiation field for communication between two or more posts
- H04B7/26—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile
- H04B7/2643—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile using time-division multiple access [TDMA]
- H04B7/2656—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile using time-division multiple access [TDMA] for structure of frame, burst
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/0001—Arrangements for dividing the transmission path
- H04L5/0003—Two-dimensional division
- H04L5/0005—Time-frequency
- H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT
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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
- H04W4/70—Services for machine-to-machine communication [M2M] or machine type communication [MTC]
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Abstract
The invention discloses a kind of equipment room（D2D）The method of communication, this method include：Before the first equipment and the second equipment carry out D2D communications, at least two sub-frame of uplink in base station configuration preset time period are the transmission subframe of first equipment and second equipment and receive subframe；The base station sends respective transmission subframe to first equipment and second equipment respectively and receives sub-frame configuration.The present invention discloses a kind of base station of D2D communications and system, can be to need two device configurations for carrying out D2D communications to send subframe and receive the purpose of subframe using the present invention.
Description
Technical field
The present invention relates to equipment room（D2D, Device-to-Device）The communication technology, more particularly to a kind of D2D communication parties
Method, base station and system.
Background technology
The D2D communication technologys are a kind of under the control of wireless communication system, it is allowed to pass through reuse pattern resource between terminal
The new technique directly to be communicated, it can increase the cellular communication system availability of frequency spectrum, reduce terminal transmission power, one
Determine can solve the problems, such as wireless communication system frequency spectrum resource scarcity in degree.With other application in the similar skill of unlicensed frequency range
Art is compared, and the D2D communication technologys have the advantages that interference is controllable.
Following wireless cellular network is by with high-speed, Large Copacity and higher service quality（QoS, Quality of
Service）The characteristics of, it is desirable to GSM has higher power utilization and the availability of frequency spectrum；Wherein, power profit
Decide that terminal carries out the service time of battery of broadband access communication with rate, the availability of frequency spectrum is decide in limited frequency spectrum resource
The traffic rate being issued to.Therefore, in third generation partner program（3GPP, the3rd Generation Partnership
Project）The Long Term Evolution of the enhancing of proposition（LTE-A, Long Term Evolution-Advanced）Systematic research item
In mesh, it is necessary in Long Term Evolution（LTE, Long Term Evolution）New technology is provided on the basis of system to meet height
Level ternational Mobile Telecommunications（IMT-A, International Mobile Telecommunications-Advanced）System
It is required that so as to provide higher data rate and power system capacity.IMT-A systems allow to lead to using D2D under community cellular network
Letter, to improve the availability of frequency spectrum.In addition, D2D communications can also bring many benefits, including：The load of mitigation cellular network,
Reduce the battery power consumption of terminal, increase bit rate, the robustness for improving network infrastructure failure etc., moreover it is possible to support new
Small range Point-to-Point Data service.
At present, not yet it has been proposed that configuring the technical scheme for sending subframe and receiving subframe in D2D communications.
The content of the invention
In view of this, can be to need it is a primary object of the present invention to provide a kind of method, base station and the system of D2D communications
Two device configurations for carrying out D2D communications send subframe and receive subframe.
To reach above-mentioned purpose, the technical proposal of the invention is realized in this way：
The invention provides a kind of method of D2D communications, methods described includes：
Before the first equipment and the second equipment carry out D2D communications, at least two in base station configuration preset time period
Sub-frame of uplink is the transmission subframe of first equipment and second equipment and receives subframe；
The base station sends respective transmission subframe to first equipment and second equipment respectively and receives subframe
Configuration.
In such scheme, at least two sub-frame of uplink in the configuration preset time period are first equipment and institute
State the transmission subframe of the second equipment and receive subframe, including：
At least two sub-frame configurations in the time cycle for the transmission subframe of first equipment and are received into subframe；
Meanwhile the reception subframe by the transmission sub-frame configuration of first equipment for second equipment, by connecing for first equipment
Receive the transmission subframe that sub-frame configuration is second equipment.
In such scheme, when time division duplex-Long Term Evolution（TDD-LTE, Time Division Duplex-Long Term
Evolution）Uplink/downlink subframe be configured to configuration 1 when, at least two sub-frame configurations by the time cycle
Transmission subframe and reception subframe for first equipment, including：
The transmission subframe for configuring first equipment is No. 2 and the 3rd work song frame in radio frames, configures first equipment
Reception subframe be radio frames in No. 7 and the 8th work song frame；Meanwhile the ACK/NACK for configuring the data that the 2nd work song frame is sent exists
Transmitted on 7th work song frame；The ACK/NACK for configuring the data of the 3rd work song frame transmission is transmitted on the 8th work song frame；
Accordingly, the transmission sub-frame configuration by first equipment is the reception subframe of second equipment, by institute
The reception sub-frame configuration for stating the first equipment is the transmission subframe of second equipment, including：
The transmission subframe for configuring second equipment is No. 7 and the 8th work song frame in radio frames, configures second equipment
Reception subframe be radio frames in No. 2 and the 3rd work song frame；The ACK/NACK of the data of the 7th work song frame transmission is configured at No. 2
Transmitted in subframe, the ACK/NACK for the data that the 8th work song frame of configuration is sent is transmitted on the 3rd work song frame.
It is described by the time cycle when TDD-LTE when being configured to configuration 1 of uplink/downlink subframe in such scheme
At least two sub-frame configurations for first equipment transmission subframe and receive subframe, including：
The transmission subframe for configuring first equipment is No. 7 and the 8th work song frame in radio frames, configures first equipment
Reception subframe be radio frames in No. 2 and the 3rd work song frame；Meanwhile the ACK/NACK for configuring the data that the 7th work song frame is sent exists
Transmitted on 2nd work song frame；The ACK/NACK for configuring the data of the 8th work song frame transmission is transmitted on the 3rd work song frame；
Accordingly, the transmission sub-frame configuration by first equipment is the reception subframe of second equipment, by institute
The reception sub-frame configuration for stating the first equipment is the transmission subframe of second equipment, including：
The transmission subframe for configuring second equipment is No. 2 and the 3rd work song frame in radio frames, configures second equipment
Reception subframe be radio frames in No. 7 and the 8th work song frame；The ACK/NACK of the data of the 2nd work song frame transmission is configured at No. 7
Transmitted in subframe, the ACK/NACK for the data that the 3rd work song frame of configuration is sent is transmitted on the 8th work song frame.
It is described by the time cycle when TDD-LTE when being configured to configuration 1 of uplink/downlink subframe in such scheme
At least two sub-frame configurations for first equipment transmission subframe and receive subframe, including：
The transmission subframe for configuring first equipment is the 2nd, 3 and 8 work song frames in radio frames, configures first equipment
It is the 7th work song frame in radio frames to receive subframe；Meanwhile the ACK/NACK for the data that the 2nd work song frame is sent is configured in the 7th work song frame
Upper transmission；The ACK/NACK for configuring the data of the 3rd work song frame transmission is transmitted on the 7th work song frame；Configure the transmission of the 8th work song frame
The ACK/NACK of data is transmitted on the 7th work song frame；
Accordingly, the transmission sub-frame configuration by first equipment is the reception subframe of second equipment, by institute
The reception sub-frame configuration for stating the first equipment is the transmission subframe of second equipment, including：
The transmission subframe for configuring second equipment is the 7th work song frame in radio frames, configures the reception of second equipment
Subframe is the 2nd, 3 and 8 work song frames in radio frames；The ACK/NACK of the data of the 7th work song frame transmission is configured in the 2nd or 3 work song frames
Upper transmission.
It is described by the time cycle when TDD-LTE when being configured to configuration 1 of uplink/downlink subframe in such scheme
At least two sub-frame configurations for first equipment transmission subframe and receive subframe, including：
The transmission subframe for configuring first equipment is the 2nd work song frame in radio frames, configures the reception of first equipment
Subframe is No. 7 frame in radio frames；Meanwhile the ACK/NACK for configuring the data that the 2nd work song frame is sent uploads in the 7th work song frame
It is defeated；
Accordingly, the transmission sub-frame configuration by first equipment is the reception subframe of second equipment, by institute
The reception sub-frame configuration for stating the first equipment is the transmission subframe of second equipment, including：
The transmission subframe for configuring second equipment is the 7th work song frame in radio frames, configures the reception of second equipment
Subframe is the 2nd work song frame in radio frames；The ACK/NACK for configuring the data of the 7th work song frame transmission is transmitted on the 2nd work song frame.
It is described by the time cycle when TDD-LTE when being configured to configuration 1 of uplink/downlink subframe in such scheme
At least two sub-frame configurations for first equipment transmission subframe and receive subframe, including：
The transmission subframe for configuring first equipment is the 3rd work song frame in radio frames, configures the reception of first equipment
Subframe is No. 8 frame in radio frames；Meanwhile the ACK/NACK for configuring the data that the 3rd work song frame is sent uploads in the 8th work song frame
It is defeated；
Accordingly, the transmission sub-frame configuration by first equipment is the reception subframe of second equipment, by institute
The reception sub-frame configuration for stating the first equipment is the transmission subframe of second equipment, including：
The transmission subframe for configuring second equipment is the 8th work song frame in radio frames, configures the reception of second equipment
Subframe is the 3rd work song frame in radio frames；The ACK/NACK for configuring the data of the 8th work song frame transmission is transmitted on 3 work song frames.
It is described to send respective transmission subframe to first equipment and second equipment respectively and connect in such scheme
Sub-frame configuration is received, is：
Respective transmission subframe and reception are sent to first equipment and second equipment by downlink signaling respectively
Sub-frame configuration.
In such scheme, respective transmission subframe and reception are being sent to first equipment and second equipment respectively
Before sub-frame configuration, methods described also includes：
All transmission subframes and reception sub-frame configuration are numbered for the base station；
Accordingly, it is described to send respective transmission subframe to first equipment and second equipment respectively and receive son
Frame configures, and is：
Respective transmission subframe and reception are sent to first equipment and second equipment by downlink signaling respectively
Numbered corresponding to sub-frame configuration.
Present invention also offers a kind of base station of D2D communications, the base station includes：Dispensing unit and transmitting element；Wherein,
Dispensing unit, for before the first equipment and the second equipment carry out D2D communications, configuring in preset time period
At least two sub-frame of uplink are the transmission subframe of first equipment and second equipment and receive subframe, and will send subframe
Transmitting element is sent to sub-frame configuration is received；
Transmitting element, after receiving the transmission subframe of dispensing unit transmission and receiving sub-frame configuration, respectively to described the
One equipment and second equipment send respective transmission subframe and receive sub-frame configuration.
In such scheme, at least two sub-frame of uplink in configuration preset time period are first equipment and described
When the transmission subframe and reception subframe of the second equipment, the dispensing unit, it is specifically used for：By at least two in the time cycle
Individual subframe is configured to the transmission subframe of first equipment and receives subframe；Meanwhile the transmission subframe of first equipment is matched somebody with somebody
The reception subframe of second equipment is set to, transmission by the reception sub-frame configuration of first equipment for second equipment
Frame.
In such scheme, the transmitting element, it is specifically used for：By downlink signaling respectively to first equipment and described
Second equipment sends respective transmission subframe and receives sub-frame configuration.
In such scheme, respective transmission subframe and reception are being sent to first equipment and second equipment respectively
Before sub-frame configuration, the transmitting element, it is additionally operable to all transmission subframes and reception sub-frame configuration being numbered；
Accordingly, sending respective transmission subframe to first equipment and second equipment respectively and receiving subframe
During configuration, the transmitting element is specifically used for：Sent respectively to first equipment and second equipment by downlink signaling
Numbered corresponding to respective transmission subframe and reception sub-frame configuration.
Invention further provides a kind of system of D2D communications, the system includes：Base station, the first equipment and second set
It is standby；Wherein,
Base station, for before the first equipment and the second equipment carry out D2D communications, configuring in preset time period at least
Two sub-frame of uplink are the transmission subframe of the first equipment and the second equipment and receive subframe, and are set respectively to the first equipment and second
Preparation send respective transmission subframe and receives sub-frame configuration；
First equipment, for receiving the transmission subframe of base station transmission and receiving sub-frame configuration；
Second equipment, for receiving the transmission subframe of base station transmission and receiving sub-frame configuration.
In such scheme, at least two sub-frame of uplink in configuration preset time period are first equipment and described
When the transmission subframe and reception subframe of the second equipment, the base station, it is specifically used for：By at least two sons in the time cycle
Frame is configured to the transmission subframe of first equipment and receives subframe；Meanwhile it is by the transmission sub-frame configuration of first equipment
The reception subframe of second equipment, by the transmission subframe that the reception sub-frame configuration of first equipment is second equipment.
In such scheme, sending respective transmission subframe to the first equipment and the second equipment respectively and receiving sub-frame configuration
When, the base station, it is specifically used for：Respective hair is sent to first equipment and second equipment by downlink signaling respectively
Send subframe and receive sub-frame configuration.
In such scheme, respective transmission subframe and reception are being sent to first equipment and second equipment respectively
Before sub-frame configuration, the base station, it is additionally operable to all transmission subframes and reception sub-frame configuration being numbered；
Accordingly, sending respective transmission subframe to first equipment and second equipment respectively and receiving subframe
During configuration, the base station is specifically used for：Sent respectively to first equipment and second equipment by downlink signaling respective
Transmission subframe and receive sub-frame configuration corresponding to number.
Method, base station and the system of D2D communications provided by the invention, D2D communications are carried out in the first equipment and the second equipment
Before, at least two sub-frame of uplink in base station configuration preset time period are the hair of first equipment and second equipment
Send subframe and receive subframe；Respective transmission subframe is sent to first equipment and second equipment and receive subframe respectively
Configuration, in this way, can be to need two device configurations for carrying out D2D communications to send subframe and receive subframe.
In addition, in the present invention, all transmission subframes and reception sub-frame configuration are numbered for base station, will by downlink signaling
Send subframe and receive numbering corresponding to sub-frame configuration and be sent to two equipment for carrying out D2D communications, in this way, can effectively save
Signaling consumption.
Brief description of the drawings
Fig. 1 is the method flow schematic diagram of D2D of the present invention communications；
Fig. 2 is the architecture of base station schematic diagram of D2D of the present invention communications；
Fig. 3 is the system structure diagram of D2D of the present invention communications.
Embodiment
Below in conjunction with the accompanying drawings and specific embodiment the present invention is further described in more detail.
The method of D2D communications of the present invention, as shown in figure 1, this method comprises the following steps：
Step 101：Before the first equipment and the second equipment carry out D2D communications, in base station configuration preset time period
At least two sub-frame of uplink are the transmission subframe of first equipment and second equipment and receive subframe；
Here, it is necessary to which explanation is：First equipment and second equipment are in the coverage of the base station
It is interior, and in the control of the base station.
At least two sub-frame of uplink in the configuration preset time period are first equipment and second equipment
Transmission subframe and receive subframe, including：
Base station sets at least two sub-frame configurations in the time cycle for described first according to the time cycle of setting
Standby transmission subframe and reception subframe, meanwhile, by the reception that the transmission sub-frame configuration of first equipment is second equipment
Subframe, by the transmission subframe that the reception sub-frame configuration of first equipment is second equipment.
The base station is specifically as follows evolved base station（ENB, evolved Node B）.
Preferably, the time cycle is 10ms integral multiple, such as：10ms, 20ms, 40ms etc..
Step 102：The base station respectively to first equipment and second equipment send respective transmission subframe and
Receive sub-frame configuration.
Specifically, the base station is sent respective to first equipment and second equipment respectively by downlink signaling
Send subframe and receive sub-frame configuration.
In practical application, base station by all transmission subframes and can receive sub-frame configurations and be numbered, also, described the
One equipment and second equipment can pre-save all possible transmission subframe and receive sub-frame configuration and corresponding numbering, when
Base station determined using which kind of with postponing, and numbering corresponding to configuration is sent into first equipment and described the by downlink signaling
After two equipment, first equipment and second equipment receive numbering corresponding to configuration, you can know the transmission subframe of itself
With the configuring condition for receiving subframe.
The present invention is described in further detail again with reference to embodiment.
Embodiment one
At present, a total of seven kinds of the configuration of TDD-LTE uplink/downlink subframe, as shown in table 1.
Table 1
In the present embodiment, TDD-LTE uplink/downlink subframe is configured to configuration 1, and device A and equipment B need to carry out D2D
Communication, eNB are that device A and equipment B configurations send subframe and receive subframe, round-trip delay according to 10ms configuration cycle（RTT,
Round Trip Time）For 10ms.Subframe is sent in the present embodiment D2D communication systems and receives subframe and is configured with following two
Kind collocation method：
First method：As shown in table 2, the transmission subframe for configuring device A is No. 2 and the 3rd work song frame in radio frames, is matched somebody with somebody
The reception subframe for putting device A is No. 7 and the 8th work song frame in radio frames.
| 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 |
| D | S | U↑ | U↑ | D | D | S | U↓ | U↓ | D |
Table 2
Wherein, D represents descending sub frame, and S represents special subframe, and U represents sub-frame of uplink, U ↑ represent transmission that D2D communicates
Frame, U ↓ represent the reception subframe that D2D communicates.
In this case, hybrid automatic repeat-request（HARQ, Hybrid Automatic Repeat Request）When
Sequence（timing）Design is as shown in table 3.
| 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 0 | 1 | 2 | 3 |
| D | S | U↑ | U↑ | D | D | S | U↓ | U↓ | D | D | S | U↑ | U↑ |
| U↑ | A↓ | U↑ | |||||||||||
| U↑ | A↓ | U↑ |
Table 3
Wherein, A ↓ representative receives ACK/NACK subframe, specifically, the ACK/ for the data that the 2nd work song frame of configuration is sent
NACK is transmitted on the 7th work song frame；The ACK/NACK for configuring the data of the 3rd work song frame transmission is transmitted on the 8th work song frame；It is shared
Two HARQ processes.As can be drawn from Table 2, if the n-th work song frame is the transmission subframe of device A, the n-th+k work songs frame is equipment
A receives the ACK/NACK of the data of the n-th work song frame subframe.K value is as shown in table 4.
| Subframe numbers | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 |
| k | 5 | 5 |
Table 4
Accordingly, the transmission subframe for configuring equipment B is No. 7 and the 8th work song frame in radio frames, configures equipment B reception
Subframe is No. 2 and the 3rd work song frame in radio frames；In this case, the ACK/NACK for the data that the 7th work song frame is sent is configured
Transmitted on the 2nd work song frame, the ACK/NACK for the data that the 8th work song frame of configuration is sent is transmitted on the 3rd work song frame；Now share
Two HARQ processes.
Second method：As shown in table 5, the transmission subframe for configuring device A is No. 7 and the 8th work song frame in radio frames, is matched somebody with somebody
The reception subframe for putting device A is No. 2 and the 3rd work song frame in radio frames；
| 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 |
| D | S | U↓ | U↓ | D | D | S | U↑ | U↑ | D |
Table 5
In this case, two HARQ processes are shared：If the n-th work song frame is the transmission subframe of device A, n-th+k numbers
Subframe is the ACK/NACK for the data that device A receives the n-th work song frame subframe；K value is as shown in table 6.
| Subframe numbers | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 |
| k | 5 | 5 |
Table 6
As can be seen from Table 6, the ACK/NACK for configuring the data that the 7th work song frame is sent is transmitted on the 2nd work song frame；Match somebody with somebody
The ACK/NACK for putting the data of the 8th work song frame transmission is transmitted on the 3rd work song frame.
Accordingly, the transmission subframe for configuring equipment B is No. 2 and the 3rd work song frame in radio frames, configures equipment B reception
Subframe is No. 7 and the 8th work song frame in radio frames；In this case, the ACK/NACK for the data that the 2nd work song frame is sent is configured
Transmitted on the 7th work song frame, the ACK/NACK for the data that the 3rd work song frame of configuration is sent is transmitted on the 8th work song frame；Now share
Two HARQ processes.
Embodiment two
In the present embodiment, TDD-LTE uplink/downlink subframe is configured to configuration 1, and device A and equipment B need to carry out D2D
Communication, eNB are that device A and equipment B configurations send subframe and receive subframe, RTT 20ms according to 10ms configuration cycle.
In the present embodiment, as shown in table 7, the transmission subframe for configuring device A is the 2nd, 3 and 8 work song frames in radio frames, is configured
The reception subframe of device A is the 7th work song frame in radio frames.
| 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 |
| D | S | U↑ | U↑ | D | D | S | U↓ | U↑ | D |
Table 7
In this case, HARQ timing designs are as shown in table 8.
| 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 |
| D | S | U↑ | U↑ | D | D | S | U↓ | U↑ | D | D | S | U↑ | U↑ | D | D | S | U↓ | U↑ | D | D | S | U↑ | U↑ | D | D | S | U↓ |
| U↑ | A↓ | U | A↓ | ||||||||||||||||||||||||
| U↑ | A↓ | U | A↓ | ||||||||||||||||||||||||
| U↑ | A↓ | ||||||||||||||||||||||||||
| U↑ | A↓ | ||||||||||||||||||||||||||
| U↑ | A↓ | ||||||||||||||||||||||||||
| U↑ | A↓ |
Table 8
Wherein, six HARQ processes are shared：Specifically, the ACK/NACK for the data that the 2nd work song frame is sent is configured at No. 7
Transmitted in subframe；The ACK/NACK for configuring the data of the 3rd work song frame transmission is transmitted on the 7th work song frame；Configure the 8th work song frame hair
The ACK/NACK for the data sent is transmitted on the 7th work song frame.As can be drawn from Table 7, if the n-th work song frame is the transmission of device A
Subframe, then the n-th+k work songs frame is the ACK/NACK for the data that device A receives the n-th work song frame subframe；The k value such as institute of table 9
Show.
| Subframe numbers | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 |
| k | 5 | 4 | 9 |
Table 9
Accordingly, the transmission subframe for configuring equipment B is the 7th work song frame in radio frames, and configuration equipment B reception subframe is nothing
2nd, 3 and 8 work song frame in line frame.In this case, the ACK/NACK for the data that the 7th work song frame is sent is configured at the 2nd or No. 3
Transmitted in subframe.Now share 1 HARQ process.
Embodiment three
In the present embodiment, TDD-LTE uplink/downlink subframe is configured to configuration 1, and device A and equipment B need to carry out D2D
Communication, eNB send subframe to device A and equipment B configurations and receive subframe, RTT 10ms according to 10ms configuration cycle.
In the present embodiment, as shown in table 10, the transmission subframe for configuring device A is the 3rd work song frame in radio frames, configures equipment
A reception subframe is the 8th work song frame in radio frames.
| 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 |
| D | S | U | U↑ | D | D | S | U | U↓ | D |
Table 10
In this case, a HARQ process is shared：If the n-th work song frame is the transmission subframe of device A, n-th+k numbers
Subframe is the ACK/NACK for the data that device A receives the n-th work song frame subframe；K value is as shown in table 11.
| Subframe numbers | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 |
| k | 5 |
Table 11
In other words, the ACK/NACK for configuring the data that the 3rd work song frame is sent is transmitted on the 8th work song frame.
Accordingly, the transmission subframe for configuring equipment B is the 8th work song frame in radio frames, and configuration equipment B reception subframe is nothing
3rd work song frame in line frame；The ACK/NACK for configuring the data of the 8th work song frame transmission is transmitted on 3 work song frames.
Example IV
In the present embodiment, TDD-LTE uplink/downlink subframe is configured to configuration 1, and device A and equipment B need to carry out D2D
Communication, eNB are that device A and equipment B configurations send subframe and receive subframe, RTT 10ms according to 10ms configuration cycle.
In the present embodiment, as shown in table 12, the transmission subframe for configuring device A is the 2nd work song frame in radio frames, configures equipment
A reception subframe is the 7th work song frame in radio frames.
| 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 |
| D | S | U↑ | U | D | D | S | U↓ | U | D |
Table 12
In this case, a HARQ process is shared：If the n-th work song frame is the transmission subframe of device A, n-th+k numbers
Subframe is the ACK/NACK for the data that device A receives the n-th work song frame subframe；K value is as shown in table 13.
| Subframe numbers | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 |
| k | 5 |
Table 13
In other words, the ACK/NACK for configuring the data that the 2nd work song frame is sent is transmitted on the 7th work song frame.
Accordingly, the transmission subframe for configuring equipment B is the 7th work song frame in radio frames, and configuration equipment B reception subframe is nothing
2nd work song frame in line frame；The ACK/NACK for configuring the data of the 7th work song frame transmission is transmitted on the 2nd work song frame.
In actual application, when TDD-LTE when being configured to configuration 1 of uplink/downlink subframe, five kinds if more than
Configuration sends subframe and the method for receiving subframe, then five kinds of configurations can be numbered to more than, such as：Configuration 1, configuration 2 ... are matched somebody with somebody
The numbering of configuration can be characterized in downlink signaling using three bits by putting 5, eNB, so as to which the transmission subframe of configuration and reception subframe are led to
Know to device A and equipment B.Specifically, it can represent that configuration 1,01 represents that configuration 2,10 represents that configuration 3,11 represents to configure with 00
4,100 represent configuration 5, wherein, because configuration 1, the bit for configuring 2, configuring 3 and configuring 4 are 2, it can now use highest
Bit is empty, merely with the mode of rear dibit.
To realize the above method, present invention also offers a kind of base station of D2D communications, as shown in Fig. 2 the base station includes：
Dispensing unit 21 and transmitting element 22；Wherein,
Dispensing unit 21, for before the first equipment and the second equipment carry out D2D communications, configuring in preset time period
At least two sub-frame of uplink for first equipment and second equipment transmission subframe and receive subframe, and son will be sent
Frame and reception sub-frame configuration are sent to transmitting element 22；
Transmitting element 22, after receiving the transmission subframe of the transmission of dispensing unit 21 and receiving sub-frame configuration, respectively to institute
State the first equipment and second equipment sends respective transmission subframe and receives sub-frame configuration.
Wherein, at least two sub-frame of uplink in configuration preset time period set for first equipment and described second
When standby transmission subframe is with subframe is received, the dispensing unit, it is specifically used for：By at least two subframes in the time cycle
It is configured to the transmission subframe of first equipment and receives subframe；Meanwhile by the transmission sub-frame configuration of first equipment it is institute
The reception subframe of the second equipment is stated, by the transmission subframe that the reception sub-frame configuration of first equipment is second equipment.
The transmitting element, is specifically used for：Sent out respectively to first equipment and second equipment by downlink signaling
Send respective transmission subframe and receive sub-frame configuration.
Send respective transmission subframe to first equipment and second equipment respectively and receive sub-frame configuration it
Before, the transmitting element, it is additionally operable to all transmission subframes and reception sub-frame configuration being numbered；
Accordingly, sending respective transmission subframe to first equipment and second equipment respectively and receiving subframe
During configuration, the transmitting element is specifically used for：Sent respectively to first equipment and second equipment by downlink signaling
Numbered corresponding to respective transmission subframe and reception sub-frame configuration.
Here, specifically adoptable configuration mode is hereinbefore described in detail the dispensing unit in base station of the present invention, no
Repeat again.
To realize the above method, and above-mentioned base station is based on, invention further provides a kind of system of D2D communications, such as Fig. 3 institutes
Show, the system includes：Base station 31, the first equipment 32 and the second equipment 33；Wherein,
Base station 31, for before the first equipment 32 and the second equipment 33 carry out D2D communications, configuring in preset time period
At least two sub-frame of uplink for the first equipment 32 and the second equipment 33 transmission subframe and receive subframe, and set respectively to first
Standby 32 and second equipment 33 send respective transmission subframe and receive sub-frame configuration；
First equipment 32, for receiving the transmission subframe of the transmission of base station 31 and receiving sub-frame configuration；
Second equipment 33, for receiving the transmission subframe of the transmission of base station 31 and receiving sub-frame configuration.
Specifically, first by the dispensing unit of base station 31 before the first equipment 32 and the second equipment 33 carry out D2D communications, press
According to the time cycle of setting, it is the first equipment 32 and the second equipment 33 to configure at least two sub-frame of uplink in the time cycle
Transmission subframe and receive subframe；Sent each to the first equipment 32 and the second equipment 33 respectively from the transmitting element of base station 31 again
Transmission subframe and receive sub-frame configuration.
Wherein, at least two sub-frame of uplink in configuration preset time period set for first equipment and described second
When standby transmission subframe is with subframe is received, the base station, it is specifically used for：By at least two sub-frame configurations in the time cycle
Transmission subframe and reception subframe for first equipment；Meanwhile by the transmission sub-frame configuration of first equipment it is described the
The reception subframe of two equipment, by the transmission subframe that the reception sub-frame configuration of first equipment is second equipment.More specifically
Ground, by the dispensing unit by least two sub-frame configurations in the time cycle for first equipment transmission subframe and
Receive subframe；Meanwhile the reception subframe by the transmission sub-frame configuration of first equipment for second equipment, by described first
The reception sub-frame configuration of equipment is the transmission subframe of second equipment.
When sending respective transmission subframe to the first equipment and the second equipment respectively and receiving sub-frame configuration, the base
Stand, be specifically used for：By downlink signaling respectively to first equipment and second equipment send respective transmission subframe and
Receive sub-frame configuration.More specifically, from the transmitting element by downlink signaling respectively to first equipment and described second
Equipment sends respective transmission subframe and receives sub-frame configuration.
Send respective transmission subframe to first equipment and second equipment respectively and receive sub-frame configuration it
Before, the base station, it is additionally operable to all transmission subframes and reception sub-frame configuration being numbered；
Accordingly, sending respective transmission subframe to first equipment and second equipment respectively and receiving subframe
During configuration, the base station is specifically used for：Sent respectively to first equipment and second equipment by downlink signaling respective
Transmission subframe and receive sub-frame configuration corresponding to number.More specifically, by all transmission subframes and connect by the transmitting element
Receive sub-frame configuration to be numbered, and respective hair is sent to first equipment and second equipment by downlink signaling respectively
Send subframe and receive and numbered corresponding to sub-frame configuration.
The foregoing is only a preferred embodiment of the present invention, is not intended to limit the scope of the present invention.
Claims (17)
- A kind of 1. method of equipment room (D2D) communication, it is characterised in that methods described includes：Before the first equipment and the second equipment carry out D2D communications, at least two in base station configuration preset time period are up Subframe is the transmission subframe of first equipment and second equipment and receives subframe；Wherein, the transmission subframe includes using In the subframe and subframe for sending the corresponding ACK/NACK of data that send data, the reception subframe includes being used to receive The subframe of data and the subframe for receiving the corresponding ACK/NACK of data；The base station sends respective transmission subframe to first equipment and second equipment respectively and receives sub-frame configuration.
- 2. according to the method for claim 1, it is characterised in that at least two in the configuration preset time period are up Subframe is the transmission subframe and reception subframe of first equipment and second equipment, including：At least two sub-frame configurations in the time cycle for the transmission subframe of first equipment and are received into subframe；Together When, the reception subframe by the transmission sub-frame configuration of first equipment for second equipment, by the reception of first equipment Sub-frame configuration is the transmission subframe of second equipment.
- 3. according to the method for claim 2, it is characterised in that when time division duplex-Long Term Evolution (TDD-LTE) up/down When being configured to configuration 1 of row subframe, at least two sub-frame configurations by the time cycle are first equipment Send subframe and receive subframe, including：The transmission subframe for configuring first equipment is No. 2 and the 3rd work song frame in radio frames, configures connecing for first equipment It is No. 7 and the 8th work song frame in radio frames to receive subframe；Meanwhile the ACK/NACK for the data that the 2nd work song frame is sent is configured the 7th Transmitted on work song frame；The ACK/NACK for configuring the data of the 3rd work song frame transmission is transmitted on the 8th work song frame；Accordingly, the transmission sub-frame configuration by first equipment is the reception subframe of second equipment, by described the The reception sub-frame configuration of one equipment is the transmission subframe of second equipment, including：The transmission subframe for configuring second equipment is No. 7 and the 8th work song frame in radio frames, configures connecing for second equipment It is No. 2 and the 3rd work song frame in radio frames to receive subframe；The ACK/NACK of the data of the 7th work song frame transmission is configured in the 2nd work song Transmitted on frame, the ACK/NACK for the data that the 8th work song frame of configuration is sent is transmitted on the 3rd work song frame.
- 4. according to the method for claim 2, it is characterised in that when TDD-LTE uplink/downlink subframe is configured to configuration 1 When, at least two sub-frame configurations by the time cycle are the transmission subframe of first equipment and receive subframe, Including：The transmission subframe for configuring first equipment is No. 7 and the 8th work song frame in radio frames, configures connecing for first equipment It is No. 2 and the 3rd work song frame in radio frames to receive subframe；Meanwhile the ACK/NACK for the data that the 7th work song frame is sent is configured the 2nd Transmitted on work song frame；The ACK/NACK for configuring the data of the 8th work song frame transmission is transmitted on the 3rd work song frame；Accordingly, the transmission sub-frame configuration by first equipment is the reception subframe of second equipment, by described the The reception sub-frame configuration of one equipment is the transmission subframe of second equipment, including：The transmission subframe for configuring second equipment is No. 2 and the 3rd work song frame in radio frames, configures connecing for second equipment It is No. 7 and the 8th work song frame in radio frames to receive subframe；The ACK/NACK of the data of the 2nd work song frame transmission is configured in the 7th work song frame Upper transmission, the ACK/NACK for the data that the 3rd work song frame of configuration is sent are transmitted on the 8th work song frame.
- 5. according to the method for claim 2, it is characterised in that when TDD-LTE uplink/downlink subframe is configured to configuration 1 When, at least two sub-frame configurations by the time cycle are the transmission subframe of first equipment and receive subframe, Including：The transmission subframe for configuring first equipment is the 2nd, 3 and 8 work song frames in radio frames, configures the reception of first equipment Subframe is the 7th work song frame in radio frames；Meanwhile the ACK/NACK for configuring the data that the 2nd work song frame is sent uploads in the 7th work song frame It is defeated；The ACK/NACK for configuring the data of the 3rd work song frame transmission is transmitted on the 7th work song frame；Configure the data of the 8th work song frame transmission ACK/NACK transmitted on the 7th work song frame；Accordingly, the transmission sub-frame configuration by first equipment is the reception subframe of second equipment, by described the The reception sub-frame configuration of one equipment is the transmission subframe of second equipment, including：The transmission subframe for configuring second equipment is the 7th work song frame in radio frames, configures the reception subframe of second equipment For the 2nd, 3 and 8 work song frame in radio frames；The ACK/NACK for configuring the data of the 7th work song frame transmission uploads in the 2nd or 3 work song frames It is defeated.
- 6. according to the method for claim 2, it is characterised in that when TDD-LTE uplink/downlink subframe is configured to configuration 1 When, at least two sub-frame configurations by the time cycle are the transmission subframe of first equipment and receive subframe, Including：The transmission subframe for configuring first equipment is the 2nd work song frame in radio frames, configures the reception subframe of first equipment For No. 7 frame in radio frames；Meanwhile the ACK/NACK for configuring the data that the 2nd work song frame is sent is transmitted on the 7th work song frame；Accordingly, the transmission sub-frame configuration by first equipment is the reception subframe of second equipment, by described the The reception sub-frame configuration of one equipment is the transmission subframe of second equipment, including：The transmission subframe for configuring second equipment is the 7th work song frame in radio frames, configures the reception subframe of second equipment For the 2nd work song frame in radio frames；The ACK/NACK for configuring the data of the 7th work song frame transmission is transmitted on the 2nd work song frame.
- 7. according to the method for claim 2, it is characterised in that when TDD-LTE uplink/downlink subframe is configured to configuration 1 When, at least two sub-frame configurations by the time cycle are the transmission subframe of first equipment and receive subframe, Including：The transmission subframe for configuring first equipment is the 3rd work song frame in radio frames, configures the reception subframe of first equipment For No. 8 frame in radio frames；Meanwhile the ACK/NACK for configuring the data that the 3rd work song frame is sent is transmitted on the 8th work song frame；Accordingly, the transmission sub-frame configuration by first equipment is the reception subframe of second equipment, by described the The reception sub-frame configuration of one equipment is the transmission subframe of second equipment, including：The transmission subframe for configuring second equipment is the 8th work song frame in radio frames, configures the reception subframe of second equipment For the 3rd work song frame in radio frames；The ACK/NACK for configuring the data of the 8th work song frame transmission is transmitted on 3 work song frames.
- 8. according to the method described in any one of claim 1 to 7, it is characterised in that described respectively to first equipment and institute State the second equipment to send respective transmission subframe and receive sub-frame configuration, be：Respective transmission subframe is sent to first equipment and second equipment respectively by downlink signaling and receives subframe Configuration.
- 9. according to the method described in any one of claim 1 to 7, it is characterised in that respectively to first equipment and described Before second equipment sends respective transmission subframe and receives sub-frame configuration, methods described also includes：All transmission subframes and reception sub-frame configuration are numbered for the base station,Accordingly, it is described to match somebody with somebody respectively to first equipment and the respective transmission subframe of second equipment transmission and reception subframe Put, be：Respective transmission subframe is sent to first equipment and second equipment respectively by downlink signaling and receives subframe Numbered corresponding to configuration.
- 10. a kind of base station of D2D communications, it is characterised in that the base station includes：Dispensing unit and transmitting element；Wherein,Dispensing unit, for before the first equipment and the second equipment carry out D2D communications, configuring in preset time period at least Two sub-frame of uplink are the transmission subframe of first equipment and second equipment and receive subframe, and will send subframe and connect Receive sub-frame configuration and be sent to transmitting element；Wherein, the transmission subframe includes being used to send the subframe of data and for sending The corresponding ACK/NACK of data subframe, the reception subframe include being used to receive the subframe of data and for receiving data phase The ACK/NACK answered subframe；Transmitting element, after receiving the transmission subframe of dispensing unit transmission and receiving sub-frame configuration, set respectively to described first Standby and described second equipment sends respective transmission subframe and receives sub-frame configuration.
- 11. base station according to claim 10, it is characterised in that at least two in configuration preset time period are up When subframe is the transmission subframe of first equipment and second equipment and receives subframe, the dispensing unit, it is specifically used for： At least two sub-frame configurations in the time cycle for the transmission subframe of first equipment and are received into subframe；Meanwhile will The transmission sub-frame configuration of first equipment is the reception subframe of second equipment, and the reception subframe of first equipment is matched somebody with somebody It is set to the transmission subframe of second equipment.
- 12. the base station according to claim 10 or 11, it is characterised in that the transmitting element, be specifically used for：By descending Signaling sends respective transmission subframe to first equipment and second equipment respectively and receives sub-frame configuration.
- 13. the base station according to claim 10 or 11, it is characterised in that respectively to first equipment and described Before two equipment send respective transmission subframe and receive sub-frame configuration, the transmitting element, it is additionally operable to all transmission subframes It is numbered with sub-frame configuration is received；Accordingly, sending respective transmission subframe to first equipment and second equipment respectively and receiving sub-frame configuration When, the transmitting element is specifically used for：Sent respectively to first equipment and second equipment by downlink signaling respective Transmission subframe and receive sub-frame configuration corresponding to number.
- 14. a kind of system of D2D communications, it is characterised in that the system includes：Base station, the first equipment and the second equipment； Wherein,Base station, for before the first equipment and the second equipment carry out D2D communications, configuring at least two in preset time period Sub-frame of uplink is the transmission subframe of the first equipment and the second equipment and receives subframe, and is sent out respectively to the first equipment and the second equipment Send respective transmission subframe and receive sub-frame configuration；Wherein, the subframe that sends includes being used for the subframe and use for sending data In the subframe for sending the corresponding ACK/NACK of data, the reception subframe includes being used to receive the subframe of data and for receiving The corresponding ACK/NACK of data subframe；First equipment, for receiving the transmission subframe of base station transmission and receiving sub-frame configuration；Second equipment, for receiving the transmission subframe of base station transmission and receiving sub-frame configuration.
- 15. system according to claim 14, it is characterised in that at least two in configuration preset time period are up When subframe is the transmission subframe of first equipment and second equipment and receives subframe, the base station, it is specifically used for：By institute State transmission subframe and reception subframe of at least two sub-frame configurations in the time cycle for first equipment；Meanwhile by described in The transmission sub-frame configuration of first equipment is the reception subframe of second equipment, and the reception sub-frame configuration by first equipment is The transmission subframe of second equipment.
- 16. the system according to claims 14 or 15, it is characterised in that sent respectively to the first equipment and the second equipment When respective transmission subframe and reception sub-frame configuration, the base station, it is specifically used for：Set respectively to described first by downlink signaling Standby and described second equipment sends respective transmission subframe and receives sub-frame configuration.
- 17. the system according to claims 14 or 15, it is characterised in that respectively to first equipment and described second Before equipment sends respective transmission subframe and receives sub-frame configuration, the base station, it is additionally operable to all transmission subframes and reception Sub-frame configuration is numbered；Accordingly, sending respective transmission subframe to first equipment and second equipment respectively and receiving sub-frame configuration When, the base station is specifically used for：Respective hair is sent to first equipment and second equipment by downlink signaling respectively Send subframe and receive and numbered corresponding to sub-frame configuration.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102281099A (en) * | 2011-08-08 | 2011-12-14 | 电信科学技术研究院 | Method, system and equipment for transmitting data in time division duplex (TDD) radio frame |
| CN103037517A (en) * | 2011-09-29 | 2013-04-10 | 中兴通讯股份有限公司 | Wireless communication method, wireless communication system and base station |
| CN103139921A (en) * | 2011-11-24 | 2013-06-05 | 华为技术有限公司 | Device-to-device (D2D) method, D2D device and base station |
| CN103209487A (en) * | 2012-01-17 | 2013-07-17 | 中兴通讯股份有限公司 | Wireless communication method, device and system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2012035367A1 (en) * | 2010-09-14 | 2012-03-22 | Nokia Corporation | D2d communication procedures: beaconing; broadcast; conflict resolution |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102281099A (en) * | 2011-08-08 | 2011-12-14 | 电信科学技术研究院 | Method, system and equipment for transmitting data in time division duplex (TDD) radio frame |
| CN103037517A (en) * | 2011-09-29 | 2013-04-10 | 中兴通讯股份有限公司 | Wireless communication method, wireless communication system and base station |
| CN103139921A (en) * | 2011-11-24 | 2013-06-05 | 华为技术有限公司 | Device-to-device (D2D) method, D2D device and base station |
| CN103209487A (en) * | 2012-01-17 | 2013-07-17 | 中兴通讯股份有限公司 | Wireless communication method, device and system |
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