CN104301075A

CN104301075A - D2D communication method, base station and system

Info

Publication number: CN104301075A
Application number: CN201310303747.XA
Authority: CN
Inventors: 姜大洁
Original assignee: China Mobile Communications Group Co Ltd
Current assignee: China Mobile Communications Group Co Ltd
Priority date: 2013-07-18
Filing date: 2013-07-18
Publication date: 2015-01-21
Anticipated expiration: 2033-07-18
Also published as: CN104301075B

Abstract

The invention discloses a D2D communication method. The method comprises steps that: before D2D communication between the first equipment and the second equipment, at least two uplink subframes within a preset time period are configured by a base station as a sending subframe and a receiving subframe of the first equipment and the second equipment; configuration of the sending subframe and the receiving subframe are respectively sent by the base station to the first equipment and the second equipment. The invention further discloses the D2D communication base station and a system. Through the method, the device and the system, the sending subframe and the receiving subframe can be respectively configured to the first equipment and the second equipment which are for D2D communication.

Description

D2D communication method, base station and system

Technical Field

The present invention relates to a Device-to-Device (D2D) communication technology, and in particular, to a D2D communication method, base station and system.

Background

The D2D communication technology is a new technology that allows terminals to communicate directly by multiplexing cell resources under the control of a wireless communication system, and can increase the spectrum utilization rate of the cellular communication system, reduce the transmitting power of the terminals, and to a certain extent, can solve the problem of the lack of spectrum resources of the wireless communication system. Compared with the similar technologies applied to the unlicensed frequency band, the D2D communication technology has the advantages of controllable interference and the like.

In the future, wireless cellular networks will have the characteristics of high rate, large capacity and higher Quality of Service (QoS), and the mobile communication system is required to have higher power utilization rate and spectrum utilization rate; the power utilization rate determines the battery service time of the terminal for broadband access communication, and the spectrum utilization rate determines the communication rate achieved under limited spectrum resources. Therefore, in the research Project of the enhanced Long Term Evolution (LTE-a) system proposed by the third Generation Partnership Project (3 GPP), there is a need to provide a new technology on the basis of the Long Term Evolution (LTE) system to meet the requirements of the International Mobile telecommunication-Advanced (IMT-a) system, thereby providing higher data rate and system capacity. IMT-a systems allow communication using D2D under a cellular network of cells to improve spectrum utilization. In addition, D2D communication can also provide various benefits, including: the method has the advantages of reducing the load of the cellular network, reducing the battery power consumption of the terminal, increasing the bit rate, improving the robustness of network infrastructure faults and the like, and can also support novel point-to-point data service in a small range.

At present, no one has proposed a technical scheme for configuring a transmission subframe and a reception subframe in D2D communication.

Disclosure of Invention

In view of the above, the present invention is directed to a method, a base station and a system for D2D communication, which are capable of configuring a transmission subframe and a reception subframe for two devices that need to perform D2D communication.

In order to achieve the purpose, the technical scheme of the invention is realized as follows:

the invention provides a method for D2D communication, which comprises the following steps:

before the first device and the second device perform D2D communication, a base station configures at least two uplink subframes in a preset time period as a sending subframe and a receiving subframe of the first device and the second device;

and the base station respectively sends respective sending subframe and receiving subframe configurations to the first equipment and the second equipment.

In the foregoing solution, the configuring at least two uplink subframes within a preset time period as the transmission subframe and the reception subframe of the first device and the second device includes:

configuring at least two subframes within the time period as a transmission subframe and a reception subframe of the first device; meanwhile, configuring a transmission subframe of the first device as a reception subframe of the second device, and configuring a reception subframe of the first device as a transmission subframe of the second device.

In the foregoing scheme, when configuration of uplink/downlink subframes of Time Division Duplex-long term Evolution (TDD-LTE, Time Division Duplex-long term Evolution) is configured as configuration 1, configuring at least two subframes in the Time period as a transmission subframe and a reception subframe of the first device includes:

configuring the sending sub-frame of the first device as No. 2 and No. 3 sub-frames in a wireless frame, and configuring the receiving sub-frame of the first device as No. 7 and No. 8 sub-frames in the wireless frame; meanwhile, configuring ACK/NACK of data sent by the sub-frame No. 2 to be transmitted on the sub-frame No. 7; configuring ACK/NACK of data sent by the sub-frame No. 3 to be transmitted on the sub-frame No. 8;

correspondingly, the configuring the transmission subframe of the first device as the reception subframe of the second device and the configuring the reception subframe of the first device as the transmission subframe of the second device includes:

configuring the sending sub-frame of the second equipment as No. 7 and No. 8 sub-frames in a wireless frame, and configuring the receiving sub-frame of the second equipment as No. 2 and No. 3 sub-frames in the wireless frame; and configuring the ACK/NACK of the data sent by the sub-frame No. 7 to be transmitted on the sub-frame No. 2, and configuring the ACK/NACK of the data sent by the sub-frame No. 8 to be transmitted on the sub-frame No. 3.

In the foregoing solution, when configuring configuration 1 of uplink/downlink subframes of TDD-LTE, the configuring at least two subframes in the time period as a transmission subframe and a reception subframe of the first device includes:

configuring the sending sub-frame of the first device as No. 7 and No. 8 sub-frames in a wireless frame, and configuring the receiving sub-frame of the first device as No. 2 and No. 3 sub-frames in the wireless frame; meanwhile, configuring ACK/NACK of data sent by the sub-frame No. 7 to be transmitted on the sub-frame No. 2; configuring ACK/NACK of data sent by the subframe No. 8 to be transmitted on the subframe No. 3;

configuring the sending sub-frame of the second equipment as the No. 2 and No. 3 sub-frames in a wireless frame, and configuring the receiving sub-frame of the second equipment as the No. 7 and No. 8 sub-frames in the wireless frame; and configuring the ACK/NACK of the data sent by the sub-frame No. 2 to be transmitted on the sub-frame No. 7, and configuring the ACK/NACK of the data sent by the sub-frame No. 3 to be transmitted on the sub-frame No. 8.

configuring the sending subframes of the first equipment as No. 2, No. 3 and No. 8 subframes in a wireless frame, and configuring the receiving subframes of the first equipment as No. 7 subframes in the wireless frame; meanwhile, configuring ACK/NACK of data sent by the sub-frame No. 2 to be transmitted on the sub-frame No. 7; configuring ACK/NACK of data sent by the sub-frame No. 3 to be transmitted on the sub-frame No. 7; configuring ACK/NACK of data sent by the subframe No. 8 to be transmitted on the subframe No. 7;

configuring a sending subframe of the second equipment as a No. 7 subframe in a wireless frame, and configuring receiving subframes of the second equipment as No. 2, 3 and 8 subframes in the wireless frame; and configuring the ACK/NACK of the data sent by the sub-frame No. 7 to be transmitted on the sub-frame No. 2 or 3.

configuring a sending subframe of the first equipment as a No. 2 subframe in a wireless frame, and configuring a receiving subframe of the first equipment as a No. 7 frame in the wireless frame; meanwhile, configuring ACK/NACK of data sent by the sub-frame No. 2 to be transmitted on the sub-frame No. 7;

configuring a sending subframe of the second equipment as a No. 7 subframe in a wireless frame, and configuring a receiving subframe of the second equipment as a No. 2 subframe in the wireless frame; and configuring the ACK/NACK of the data sent by the sub-frame No. 7 to be transmitted on the sub-frame No. 2.

configuring a sending subframe of the first equipment as a No. 3 subframe in a wireless frame, and configuring a receiving subframe of the first equipment as a No. 8 frame in the wireless frame; meanwhile, configuring ACK/NACK of data sent by the sub-frame No. 3 to be transmitted on the sub-frame No. 8;

configuring a sending subframe of the second equipment as a No. 8 subframe in a wireless frame, and configuring a receiving subframe of the second equipment as a No. 3 subframe in the wireless frame; and configuring the ACK/NACK of the data sent by the subframe No. 8 to be transmitted on the subframe No. 3.

In the foregoing solution, the sending respective configurations of the transmission subframe and the reception subframe to the first device and the second device respectively is:

and respectively sending respective sending subframe and receiving subframe configuration to the first equipment and the second equipment through downlink signaling.

In the foregoing solution, before transmitting respective configurations of a transmission subframe and a reception subframe to the first device and the second device, the method further includes:

the base station numbers all the sending sub-frame and receiving sub-frame configurations;

correspondingly, the sending of the respective configurations of the sending subframe and the receiving subframe to the first device and the second device is:

and respectively sending numbers corresponding to the respective sending sub-frame and receiving sub-frame configurations to the first equipment and the second equipment through downlink signaling.

The invention also provides a base station for D2D communication, comprising: a configuration unit and a transmission unit; wherein,

the device comprises a configuration unit, a sending unit and a receiving unit, wherein the configuration unit is used for configuring at least two uplink subframes in a preset time period as a sending subframe and a receiving subframe of a first device and a second device before the first device and the second device carry out D2D communication, and the sending subframe and the receiving subframe are configured and sent to the sending unit;

and the sending unit is used for sending respective sending subframe configuration and receiving subframe configuration to the first equipment and the second equipment respectively after receiving the sending subframe configuration and the receiving subframe configuration sent by the configuration unit.

In the foregoing solution, when at least two uplink subframes configured within a preset time period are the transmission subframe and the reception subframe of the first device and the second device, the configuration unit is specifically configured to: configuring at least two subframes within the time period as a transmission subframe and a reception subframe of the first device; meanwhile, configuring a transmission subframe of the first device as a reception subframe of the second device, and configuring a reception subframe of the first device as a transmission subframe of the second device.

In the foregoing scheme, the sending unit is specifically configured to: and respectively sending respective sending subframe and receiving subframe configuration to the first equipment and the second equipment through downlink signaling.

In the foregoing solution, before sending respective configurations of a transmission subframe and a reception subframe to the first device and the second device, the sending unit is further configured to number all configurations of the transmission subframe and the reception subframe;

correspondingly, when sending respective configurations of a transmission subframe and a reception subframe to the first device and the second device, the sending unit is specifically configured to: and respectively sending numbers corresponding to the respective sending sub-frame and receiving sub-frame configurations to the first equipment and the second equipment through downlink signaling.

The invention further provides a system for D2D communication, the system comprising: a base station, a first device, and a second device; wherein,

the base station is used for configuring at least two uplink subframes in a preset time period as a sending subframe and a receiving subframe of the first equipment and the second equipment before the first equipment and the second equipment carry out D2D communication, and respectively sending respective sending subframe and receiving subframe configurations to the first equipment and the second equipment;

the first equipment is used for receiving a sending subframe and a receiving subframe configuration sent by a base station;

and the second equipment is used for receiving the configuration of the transmission subframe and the reception subframe sent by the base station.

In the foregoing solution, when at least two uplink subframes configured within a preset time period are the transmission subframe and the reception subframe of the first device and the second device, the base station is specifically configured to: configuring at least two subframes within the time period as a transmission subframe and a reception subframe of the first device; meanwhile, configuring a transmission subframe of the first device as a reception subframe of the second device, and configuring a reception subframe of the first device as a transmission subframe of the second device.

In the foregoing solution, when sending respective configurations of a transmission subframe and a reception subframe to a first device and a second device, the base station is specifically configured to: and respectively sending respective sending subframe and receiving subframe configuration to the first equipment and the second equipment through downlink signaling.

In the above scheme, before sending respective configurations of a transmission subframe and a reception subframe to the first device and the second device, the base station is further configured to number all configurations of the transmission subframe and the reception subframe;

correspondingly, when sending respective configurations of a transmission subframe and a reception subframe to the first device and the second device, the base station is specifically configured to: and respectively sending numbers corresponding to the respective sending sub-frame and receiving sub-frame configurations to the first equipment and the second equipment through downlink signaling.

According to the method, the base station and the system for D2D communication, before D2D communication is carried out between first equipment and second equipment, the base station configures at least two uplink subframes in a preset time period as a sending subframe and a receiving subframe of the first equipment and the second equipment; and respectively transmitting respective transmission subframe and receiving subframe configurations to the first device and the second device, so that the transmission subframe and the receiving subframe can be configured for two devices needing D2D communication.

In addition, in the invention, the base station numbers all the sending subframe and receiving subframe configurations, and sends the numbers corresponding to the sending subframe and the receiving subframe configurations to the two devices for D2D communication through the downlink signaling, thus effectively saving signaling overhead.

Drawings

FIG. 1 is a flow chart of a method for D2D communication according to the present invention;

fig. 2 is a schematic structural diagram of a base station for D2D communication according to the present invention;

fig. 3 is a schematic diagram of the system structure for D2D communication according to the present invention.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

The method for communication of D2D of the present invention, as shown in fig. 1, includes the following steps:

step 101: before the first device and the second device perform D2D communication, a base station configures at least two uplink subframes in a preset time period as a sending subframe and a receiving subframe of the first device and the second device;

here, it should be noted that: the first device and the second device are both within a coverage area of the base station and are both under control of the base station.

The configuring at least two uplink subframes within a preset time period as the transmission subframe and the reception subframe of the first device and the second device includes:

the base station configures at least two subframes in the time period as a transmitting subframe and a receiving subframe of the first device according to the set time period, and simultaneously configures the transmitting subframe of the first device as a receiving subframe of the second device and configures the receiving subframe of the first device as the transmitting subframe of the second device.

The base station may specifically be an evolved Node B (eNB).

Preferably, the time period is an integer multiple of 10ms, such as: 10ms, 20ms, 40ms, etc.

Step 102: and the base station respectively sends respective sending subframe and receiving subframe configurations to the first equipment and the second equipment.

Specifically, the base station sends respective configurations of a transmission subframe and a reception subframe to the first device and the second device through downlink signaling.

In practical application, a base station may number all configurations of transmission subframes and reception subframes, and the first device and the second device may pre-store all possible configurations of transmission subframes and reception subframes and corresponding numbers, and after the base station determines which configuration is adopted, the base station transmits the number corresponding to the configuration to the first device and the second device through a downlink signaling, and after receiving the number corresponding to the configuration, the first device and the second device may obtain the configuration conditions of their own transmission subframes and reception subframes.

The present invention will be described in further detail with reference to examples.

Example one

At present, there are seven uplink/downlink subframe configurations of TDD-LTE, as shown in table 1.

TABLE 1

In this embodiment, the configuration of the uplink/downlink subframes of TDD-LTE is configuration 1, the device a and the device B need to perform D2D communication, the eNB configures a transmission subframe and a reception subframe for the device a and the device B according to a configuration period of 10ms, and a Round Trip Time (RTT) is 10 ms. In the D2D communication system of this embodiment, the following two configuration methods are configured for the transmission subframe and the reception subframe:

the first method comprises the following steps: as shown in table 2, the transmission subframes of the device a are configured as subframes No. 2 and No. 3 in the radio frame, and the reception subframes of the device a are configured as subframes No. 7 and No. 8 in the radio frame.

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 a downlink subframe, S represents a special subframe, U represents an uplink subframe, U ↓ represents a transmission subframe of D2D communication, and U ↓ represents a reception subframe of D2D communication.

In this case, Hybrid Automatic repeat request (HARQ) timing (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

A ↓ represents a subframe for receiving ACK/NACK, and specifically, ACK/NACK of data sent by the subframe No. 2 is configured to be transmitted on the subframe No. 7; configuring ACK/NACK of data sent by the sub-frame No. 3 to be transmitted on the sub-frame No. 8; there are two HARQ processes. As can be seen from table 2, if the nth subframe is the transmission subframe of the device a, the nth + k subframe is a subframe in which the device a receives ACK/NACK of data of the nth subframe. The values of k are shown in table 4.

Subframe number	0	1	2	3	4	5	6	7	8	9
											k			5	5

TABLE 4

Correspondingly, configuring the sending sub-frame of the device B as the No. 7 and No. 8 sub-frames in a wireless frame, and configuring the receiving sub-frame of the device B as the No. 2 and No. 3 sub-frames in the wireless frame; in this case, configuring ACK/NACK of data sent by subframe No. 7 to be transmitted on subframe No. 2, and configuring ACK/NACK of data sent by subframe No. 8 to be transmitted on subframe No. 3; there are two HARQ processes at this time.

The second method comprises the following steps: as shown in table 5, the sending subframes of the device a are configured as subframes No. 7 and No. 8 in the radio frame, and the receiving subframes of the device a are configured as subframes No. 2 and No. 3 in the radio frame;

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, there are two HARQ processes: if the nth subframe is a sending subframe of the equipment A, the nth + k subframe is a subframe for receiving ACK/NACK of the data of the nth subframe by the equipment A; the values of k are shown in table 6.

Subframe number	0	1	2	3	4	5	6	7	8	9
											k								5	5

TABLE 6

As can be seen from table 6, ACK/NACK configuring data sent by subframe No. 7 is transmitted on subframe No. 2; and configuring the ACK/NACK of the data sent by the subframe No. 8 to be transmitted on the subframe No. 3.

Correspondingly, configuring the sending sub-frame of the device B as the No. 2 and No. 3 sub-frames in a wireless frame, and configuring the receiving sub-frame of the device B as the No. 7 and No. 8 sub-frames in the wireless frame; in this case, configuring ACK/NACK of data sent by subframe No. 2 to be transmitted on subframe No. 7, and configuring ACK/NACK of data sent by subframe No. 3 to be transmitted on subframe No. 8; there are two HARQ processes at this time.

Example two

In this embodiment, the configuration of uplink/downlink subframes of TDD-LTE is configuration 1, device a and device B need to perform D2D communication, eNB configures a transmission subframe and a reception subframe for device a and device B according to a configuration period of 10ms, and RTT is 20 ms.

In this embodiment, as shown in table 7, the sending subframes of the device a are configured as subframes No. 2, 3, and 8 in the radio frame, and the receiving subframes of the device a are configured as subframe No. 7 in the radio frame.

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, the HARQ timing design is 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↑

D

S

U↓

U↑

D

S

U↑

D

S

U↓

U↑

D

S

U↑

D

S

U↓

U↑

A↓

U

A↓

U↑

A↓

U

A↓

U↑

A↓

U↑

A↓

U↑

A↓

U↑

A↓

TABLE 8

Wherein, there are six HARQ processes: specifically, configuring ACK/NACK of data sent by the sub-frame No. 2 to be transmitted on the sub-frame No. 7; configuring ACK/NACK of data sent by the sub-frame No. 3 to be transmitted on the sub-frame No. 7; and configuring the ACK/NACK of the data sent by the subframe No. 8 to be transmitted on the subframe No. 7. As can be seen from table 7, if the nth subframe is the transmission subframe of the device a, the nth + k subframe is a subframe in which the device a receives ACK/NACK of data of the nth subframe; the values of k are shown in table 9.

Subframe number	0	1	2	3	4	5	6	7	8	9
											k			5	4					9

TABLE 9

Correspondingly, the sending subframe of the device B is configured as the 7 th subframe in the radio frame, and the receiving subframe of the device B is configured as the 2 nd, 3rd and 8 th subframes in the radio frame. In this case, ACK/NACK configuring data transmitted by subframe No. 7 is transmitted on subframe No. 2 or 3. There are 1 HARQ processes at this time.

EXAMPLE III

In this embodiment, the configuration of uplink/downlink subframes of TDD-LTE is configuration 1, device a and device B need to perform D2D communication, eNB configures a transmission subframe and a reception subframe for device a and device B according to a configuration period of 10ms, and RTT is 10 ms.

In this embodiment, as shown in table 10, the sending subframe of the device a is configured as the No. 3 subframe in the radio frame, and the receiving subframe of the device a is configured as the No. 8 subframe in the radio frame.

0	1	2	3	4	5	6	7	8	9
										D	S	U	U↑	D	D	S	U	U↓	D

Watch 10

In this case, there is one HARQ process in common: if the nth subframe is a sending subframe of the equipment A, the nth + k subframe is a subframe for receiving ACK/NACK of the data of the nth subframe by the equipment A; the values of k are shown in table 11.

Subframe number	0	1	2	3	4	5	6	7	8	9
											k				5

TABLE 11

In other words, ACK/NACK of data transmitted by subframe number 3 is configured to be transmitted on subframe number 8.

Correspondingly, configuring a sending subframe of the device B as a No. 8 subframe in a wireless frame, and configuring a receiving subframe of the device B as a No. 3 subframe in the wireless frame; and configuring the ACK/NACK of the data sent by the subframe No. 8 to be transmitted on the subframe No. 3.

Example four

In this embodiment, as shown in table 12, the sending subframe of the device a is configured as the No. 2 subframe in the radio frame, and the receiving subframe of the device a is configured as the No. 7 subframe in the radio frame.

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, there is one HARQ process in common: if the nth subframe is a sending subframe of the equipment A, the nth + k subframe is a subframe for receiving ACK/NACK of the data of the nth subframe by the equipment A; the values of k are shown in table 13.

Subframe number	0	1	2	3	4	5	6	7	8	9
											k			5

Watch 13

In other words, the ACK/NACK of the data sent by subframe No. 2 is configured to be transmitted on subframe No. 7.

Correspondingly, configuring a sending subframe of the device B as a No. 7 subframe in a wireless frame, and configuring a receiving subframe of the device B as a No. 2 subframe in the wireless frame; and configuring the ACK/NACK of the data sent by the sub-frame No. 7 to be transmitted on the sub-frame No. 2.

In an actual application process, when the configuration of the uplink/downlink subframe of TDD-LTE is configuration 1, if there are the above five methods for configuring the transmission subframe and the reception subframe, the above five configurations may be numbered, for example: configuration 1, configuration 2 … configuration 5, the eNB may characterize the number of the configuration using three bits in the downlink signaling in order to inform device a and device B of the configured transmission and reception subframes. Specifically, configuration 1 may be represented by 00, configuration 2 may be represented by 01, configuration 3 may be represented by 10, configuration 4 may be represented by 11, and configuration 5 may be represented by 100, where, since the bits of configuration 1, configuration 2, configuration 3, and configuration 4 are 2, the highest bit may be left empty at this time, and only the last two bits may be utilized.

In order to implement the foregoing method, the present invention further provides a base station for D2D communication, as shown in fig. 2, the base station includes: a configuration unit 21 and a transmission unit 22; wherein,

a configuration unit 21, configured to configure at least two uplink subframes in a preset time period as a transmission subframe and a reception subframe of a first device and a second device before the first device performs D2D communication with the second device, and send the transmission subframe and the reception subframe to a sending unit 22;

a sending unit 22, configured to send respective sending subframe and receiving subframe configurations to the first device and the second device after receiving the sending subframe and receiving subframe configurations sent by the configuration unit 21.

When at least two uplink subframes within a preset time period are configured as the transmission subframe and the reception subframe of the first device and the second device, the configuration unit is specifically configured to: configuring at least two subframes within the time period as a transmission subframe and a reception subframe of the first device; meanwhile, configuring a transmission subframe of the first device as a reception subframe of the second device, and configuring a reception subframe of the first device as a transmission subframe of the second device.

The sending unit is specifically configured to: and respectively sending respective sending subframe and receiving subframe configuration to the first equipment and the second equipment through downlink signaling.

Before sending respective configurations of a transmission subframe and a reception subframe to the first device and the second device, the sending unit is further configured to number all configurations of the transmission subframe and the reception subframe;

Here, the specific available configuration manner of the configuration unit in the base station according to the present invention has been described in detail above, and is not described again.

In order to implement the method and be based on the base station, the invention further provides a system for D2D communication, as shown in fig. 3, the system includes: a base station 31, a first device 32, and a second device 33; wherein,

the base station 31 is configured to configure at least two uplink subframes within a preset time period as a transmission subframe and a reception subframe of the first device 32 and the second device 33 before the first device 32 performs D2D communication with the second device 33, and send respective configurations of the transmission subframe and the reception subframe to the first device 32 and the second device 33, respectively;

a first device 32, configured to receive a transmission subframe and a reception subframe configuration sent by the base station 31;

and a second device 33, configured to receive the transmission subframe and the reception subframe configuration transmitted by the base station 31.

Specifically, before the first device 32 performs D2D communication with the second device 33, the configuration unit of the base station 31 configures, according to a set time period, at least two uplink subframes in the time period as a transmission subframe and a reception subframe of the first device 32 and the second device 33; the transmitting unit of the base station 31 then transmits the respective transmit subframe and receive subframe configurations to the first device 32 and the second device 33, respectively.

When at least two uplink subframes within a preset time period are configured as the transmission subframe and the reception subframe of the first device and the second device, the base station is specifically configured to: configuring at least two subframes within the time period as a transmission subframe and a reception subframe of the first device; meanwhile, configuring a transmission subframe of the first device as a reception subframe of the second device, and configuring a reception subframe of the first device as a transmission subframe of the second device. More specifically, configuring, by the configuration unit, at least two subframes within the time period as a transmission subframe and a reception subframe of the first device; meanwhile, configuring a transmission subframe of the first device as a reception subframe of the second device, and configuring a reception subframe of the first device as a transmission subframe of the second device.

When sending respective configurations of a transmission subframe and a reception subframe to a first device and a second device, the base station is specifically configured to: and respectively sending respective sending subframe and receiving subframe configuration to the first equipment and the second equipment through downlink signaling. More specifically, the sending unit sends respective configurations of a sending subframe and a receiving subframe to the first device and the second device through downlink signaling.

Before sending respective configurations of a transmission subframe and a reception subframe to the first device and the second device, the base station is further configured to number all configurations of the transmission subframe and the reception subframe;

correspondingly, when sending respective configurations of a transmission subframe and a reception subframe to the first device and the second device, the base station is specifically configured to: and respectively sending numbers corresponding to the respective sending sub-frame and receiving sub-frame configurations to the first equipment and the second equipment through downlink signaling. More specifically, the sending unit numbers all the configurations of the sending subframes and the receiving subframes, and sends numbers corresponding to the configurations of the sending subframes and the receiving subframes to the first device and the second device respectively through downlink signaling.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention.

Claims

1. A method of inter-device (D2D) communication, the method comprising:

2. The method of claim 1, wherein the configuring at least two uplink subframes within a preset time period as a transmission subframe and a reception subframe of the first device and the second device comprises:

3. The method of claim 2, wherein when the configuration of uplink/downlink subframes of time division duplex-long term evolution (TDD-LTE) is configuration 1, the configuring at least two subframes within the time period as transmission subframes and reception subframes of the first device comprises:

4. The method of claim 2, wherein when configuring uplink/downlink subframes of TDD-LTE as configuration 1, the configuring at least two subframes in the time period as transmission subframes and reception subframes of the first device comprises:

5. The method of claim 2, wherein when configuring uplink/downlink subframes of TDD-LTE as configuration 1, the configuring at least two subframes in the time period as transmission subframes and reception subframes of the first device comprises:

6. The method of claim 2, wherein when configuring uplink/downlink subframes of TDD-LTE as configuration 1, the configuring at least two subframes in the time period as transmission subframes and reception subframes of the first device comprises:

7. The method of claim 2, wherein when configuring uplink/downlink subframes of TDD-LTE as configuration 1, the configuring at least two subframes in the time period as transmission subframes and reception subframes of the first device comprises:

8. The method according to any of claims 1 to 7, wherein the sending respective transmit subframe and receive subframe configurations to the first device and the second device, respectively, is:

9. The method of any of claims 1 to 7, wherein prior to transmitting respective transmit subframe and receive subframe configurations to the first device and the second device, respectively, the method further comprises:

10. A base station for D2D communication, the base station comprising: a configuration unit and a transmission unit; wherein,

11. The base station of claim 10, wherein when at least two uplink subframes within a preset time period are configured as the transmission subframe and the reception subframe of the first device and the second device, the configuration unit is specifically configured to: configuring at least two subframes within the time period as a transmission subframe and a reception subframe of the first device; meanwhile, configuring a transmission subframe of the first device as a reception subframe of the second device, and configuring a reception subframe of the first device as a transmission subframe of the second device.

12. The base station according to claim 10 or 11, wherein the sending unit is specifically configured to: and respectively sending respective sending subframe and receiving subframe configuration to the first equipment and the second equipment through downlink signaling.

13. The base station according to claim 10 or 11, wherein the sending unit is further configured to number all transmission subframes and reception subframe configurations before sending the respective transmission subframe and reception subframe configurations to the first device and the second device, respectively;

14. A system for D2D communication, the system comprising: a base station, a first device, and a second device; wherein,

15. The system of claim 14, wherein when at least two uplink subframes configured within a preset time period are the transmission subframe and the reception subframe of the first device and the second device, the base station is specifically configured to: configuring at least two subframes within the time period as a transmission subframe and a reception subframe of the first device; meanwhile, configuring a transmission subframe of the first device as a reception subframe of the second device, and configuring a reception subframe of the first device as a transmission subframe of the second device.

16. The system according to claim 14 or 15, wherein, when sending respective configurations of a transmission subframe and a reception subframe to the first device and the second device, respectively, the base station is specifically configured to: and respectively sending respective sending subframe and receiving subframe configuration to the first equipment and the second equipment through downlink signaling.

17. The system according to claim 14 or 15, wherein the base station, before transmitting respective transmit subframe and receive subframe configurations to the first device and the second device, is further configured to number all transmit subframes and receive subframe configurations;