WO2014135090A1

WO2014135090A1 - Data transmission method, system and device

Info

Publication number: WO2014135090A1
Application number: PCT/CN2014/072950
Authority: WO
Inventors: 赵锐; 高秋彬; 陈文洪; 彭莹
Original assignee: 电信科学技术研究院
Priority date: 2013-03-08
Filing date: 2014-03-06
Publication date: 2014-09-12
Also published as: CN104038920B; CN104038920A

Abstract

The present application relates to the technical field of radio communication, in particular to a data transmission method, system and device, for directing D2D communication between multiple user devices in a cellular mobile communication network so as to achieve D2D transmission. The method of an embodiment of the present application comprises: on a N2D link, a network-side device directs the user devices communicating in the D2D transmission to communicate on a D2D link. Because a network-side device, on a N2D link and according to the information indication field in an RNTI and/or DCI, directs the user devices communicating in the D2D transmission to communicate on a D2D link, the network-side device can direct the D2D communication between multiple user devices in a cellular mobile communication network so as to achieve D2D transmission, thus improving system performance.

Description

The present invention claims the Chinese patent application filed on March 8, 2013 by the Chinese Patent Office, the application number is 201310075197.0, and the invention name is "a method, system and device for data transmission". Priority is hereby incorporated by reference in its entirety. The present invention relates to the field of wireless communication technologies, and in particular, to a method, system, and device for data transmission. BACKGROUND OF THE INVENTION In a conventional cellular communication technology, a data communication process between two user equipments is shown in FIG. Services such as voice and data of the two user devices interact through the eB (evolved base station) and the core network where they reside.

D2D (Device-to-Device), which means that the user equipment can transmit data through a direct link in a close range, without forwarding through the central node (ie, the base station). as shown in picture 2. D2D technology's short-range communication characteristics and direct communication methods have the following advantages:

The short-distance direct communication mode of the user equipment can achieve higher data rate, lower delay and lower power consumption. The spectrum resources can be effectively realized by using the widely distributed user equipment in the network and the short-distance characteristics of the D2D communication link. Use

D2D's direct communication method can adapt to the local data sharing requirements of services such as wireless P2P, and provide flexible and adaptable data services;

D2D direct communication can take advantage of the large number of widely distributed communication user equipment in the network to extend the coverage of the network.

The LTE D2D technology refers to D2D communication controlled by an LTE network operating on an LTE licensed frequency band. On the one hand, the advantages of D2D technology can be fully utilized, and the control of LTE network can also overcome some problems of traditional D2D technology, such as uncontrollable interference. The introduction of LTE D2D features will enable LTE technology to evolve from pure wireless mobile cellular communication technology to Universal Connectivity Technology.

However, there is currently no indication scheme for D2D communication between two user equipments in a cellular mobile communication network, so that D2D transmission cannot be realized. SUMMARY OF THE INVENTION The present invention provides a method, system and device for data transmission for performing D2D communication indication between a plurality of user equipments under a cellular mobile communication network to implement D2D transmission. A data transmission method provided by an embodiment of the present invention includes:

The network side device configures the user equipment for the wireless network temporary identifier RNTI for D2D communication and/or the information indicating field in the downlink control information DCI;

The network side device indicates a domain according to the information in the RNTI and/or the DCI, and the user equipment that communicates in the D2D communication on the network and the user equipment through link N2D Link is directly connected to the D2D link between the user equipments. Communication.

Preferably, the network side device configures, for the user equipment, a first RNTI for indicating that the user equipment communicates on the D2D link;

Alternatively, the network side device configures, for the user equipment, a second RNTI for indicating that the user equipment performs data transmission on the D2D link, and/or a third for indicating that the user equipment performs data reception on the D2D link. RNTL

Preferably, the network side device configures, for the user equipment, a group RNTI for indicating data reception in D2D group communication; and/or a second RNTI for indicating that the user equipment performs data transmission on the D2D link. .

Preferably, the information indication field in the DCI is used to indicate that the user equipment sends or receives data on the D2D link.

Preferably, the network side device configures, for the user equipment, a first RNTI for indicating that the user equipment communicates on the D2D link; and the information indication field in the DCI is used to indicate that the user equipment sends or receives data. .

Preferably, the network side configures, for the user equipment, a group RNTI for indicating data reception in the D2D group communication; and/or the information indication field in the DCI is used to indicate that the user equipment is in the D2D link. Send or receive data on.

Preferably, the network side device indicates, according to the information indicating domain in the RNTI and/or the DCI, that the user equipment that communicates in the D2D communication communicates on the D2D Link on the N2D Link, and includes:

The network side device indicates, according to the information indication field in the RNTI and/or the DCI, the user equipment that performs data transmission in the D2D communication on the N2D Link to send data on the D2D Link; according to the RNTI and/or the DCI The information indication field indicates that the user equipment that performs data reception in the D2D communication on the N2D Link receives data on the D2D Link.

Preferably, the network device on the N2D Link indicates that the user equipment that performs data transmission in the D2D communication sends data on the D2D Link, including:

The network side device transmits, in the PDCCH/EPDCCH common search space and/or the PDCCH/EPDCCH-specific search space determined by the user equipment C-RNTI, the user equipment that performs data transmission in the D2D communication to send data on the D2D Link. DCI.

Preferably, the DCI scrambled RNTI is a C-RNTI or a first RNTI or a second RNTI.

Preferably, the network side device indicates, on the N2D Link, that the user equipment that performs data reception in the D2D communication is Receive data on the D2D Link, including:

The network side device transmits, in the PDCCH/EPDCCH common search space and/or the PDCCH/EPDCCH-specific search space determined by the user equipment C-RNTI, the user equipment that receives data reception in the D2D communication receives data on the D2D Link. DCI.

Preferably, the DCI scrambled RNTI is a C-RNTI or a first RNTI or a third RNTI.

Preferably, the network device, on the N2D Link, instructs the user equipment that performs data reception in the D2D communication to receive data on the D2D Link, including:

Transmitting, by the network side device, the DCI received by the D2D link in a common search space of the PDCCH/EPDCCH; and/or transmitting the data in the D2D communication in the dedicated search space of the PDCCH/EPDCCH determined by the group RNTI of the user equipment The received user equipment receives the DCI of the data on the D2D Link.

Preferably, the DCI scrambled RNTI is a group RNTL

Another method for data transmission provided by the embodiment of the present invention includes:

Determining, by the user equipment, an information indication field in the RNTI and/or DCI configured for the D2D communication by the network side device;

The user equipment receives the DCI, and performs D2D link communication according to the RNTI of the received DCI and/or the information indication field in the received DCI.

Preferably, the user equipment performs D2D link communication, including:

After receiving the DCI scrambled by the first RNTI for indicating that the user equipment communicates on the D2D link, the user equipment performs D2D link communication;

After receiving the DCI scrambled by the second RNTI for indicating data transmission by the user equipment on the D2D link, the user equipment performs data transmission on the D2D link;

After receiving the DCI scrambled by the third RNTI for indicating that the user equipment performs data reception on the D2D link, the user equipment performs data reception on the D2D link.

Preferably, the user equipment performs D2D link communication, including:

After the user equipment receives the DCI scrambled by the user equipment to indicate data transmission on the D2D link, and the DCI used to indicate the group RNTI scrambling for data reception in the D2D group communication, the D2D link Data transmission;

After receiving the DCI scrambled by the group RNTI for indicating data reception in the D2D group communication, the user equipment performs data reception on the D2D link.

Preferably, the user equipment performs D2D link communication, including:

After the user equipment receives the DCI including the information indication domain, if the information indication domain indicates that the user equipment is

Sending data on the D2D link, and transmitting data on the D2D link; if the information indicating field indicates that the user equipment is

When data is received on the D2D link, data is received on the D2D link. Preferably, the user equipment performs D2D link communication, including:

After receiving the DCI scrambled by the first RNTI indicating that the user equipment communicates on the D2D link, the user equipment receives the data indication field, and if the information indication field indicates that the user equipment sends data, then the D2D Send data on the link;

After receiving the DCI scrambled by the first RNTI for indicating that the user equipment communicates on the D2D link, the user equipment receives the data indicating that the user equipment receives the data, and then the D2D Data reception on the link.

Preferably, the user equipment performs D2D link communication, including:

Receiving, by the user equipment, a DCI that includes an information indication field and is scrambled by the first RNTI for indicating that the user equipment performs communication on the D2D link, and the information indication field indicates that the user equipment sends data, and receives After the DCI scrambled by the group RNTI for receiving the D2D group communication, the data transmission is performed on the D2D link; the user equipment receives the information indicating domain, and the C- RNTI scrambled DCI, and the information indication field indicates that the user equipment sends data on the D2D link, and after receiving the DCI scrambled by the group RNTI for indicating data reception in the D2D group communication, on the D2D link Data transmission;

The user equipment is scrambled upon receiving a group RNTI for data reception in indicating D2D group communication

After DCI, data is received on the D2D link.

Preferably, the receiving, by the user equipment, the DCI includes:

The user equipment receives the DCI in a common search space of the PDCCH/EPDCCH and/or a PDCCH/EPDCCH-specific search space determined by the user equipment C-RNTI.

Preferably, the DCI scrambled RNTI is a C-RNTI or a first RNTI or a second RNTI or a third RNTI. Preferably, the receiving, by the user equipment, the DCI includes:

Transmitting, by the user equipment, a DCI received by the D2D link in a common search space of the PDCCH/EPDCCH; and/or receiving, in a dedicated search space of the PDCCH/EPDCCH determined by the group RNTI of the user equipment, receiving data in the D2D communication The user equipment receives the DCI of the data on the D2D Link.

Preferably, the RNTI of the DCI plus 4 is a group RNTI.

A network side device for data transmission provided by the embodiment of the present invention includes:

a configuration module, configured to configure, by the user equipment, an information indication field in the RNTI and/or the DCI for the D2D communication; the indication module, configured to indicate the domain according to the information in the RNTI and/or the DCI, and indicate the D2D on the N2D Link User equipment communicating in communication communicates on the D2D Link.

Preferably, the configuration module is specifically configured to:

Configuring a first RNTI for the user equipment to indicate that the user equipment communicates on the D2D link, or configuring the user equipment with a second RNTI for indicating that the user equipment performs data transmission on the D2D link, and / or a third RNTI indicating that the user equipment is receiving data on the D2D link. Preferably, the configuration module is specifically configured to:

Configuring, for the user equipment, a group RNTI for indicating data reception in the D2D group communication; and/or a second RNTI for indicating that the user equipment performs data transmission on the D2D link.

Preferably, the configuration module is specifically configured to:

And configuring, by the user equipment, a first RNTI for indicating that the user equipment communicates on the D2D link; and the information indication field in the DCI is used to indicate that the user equipment sends or receives data.

Preferably, the configuration module is specifically configured to:

And configuring, by the user equipment, a group RNTI for indicating data reception in the D2D group communication; and/or the information indication field in the DCI is used to indicate that the user equipment sends or receives data on the D2D link.

Preferably, the indication module is specifically configured to:

Determining, according to the information indication domain in the RNTI and/or the DCI, the user equipment that performs data transmission in the D2D communication on the N2D Link to send data on the D2D Link; indicating the domain according to the information in the RNTI and/or DCI, The user equipment indicating the data reception in the D2D communication on the N2D Link receives the data on the D2D Link.

Preferably, the indication module is specifically configured to:

In the PDCCH/EPDCCH common search space and/or the PDCCH/EPDCCH-specific search space determined by the user equipment C-RNTI, the DCI indicating that the user equipment performing data transmission in the D2D communication transmits the data on the D2D Link is transmitted.

Preferably, the indication module is specifically configured to:

In the PDCCH/EPDCCH common search space and/or the PDCCH/EPDCCH-specific search space determined by the user equipment C-RNTI, the DCI indicating that the user equipment performing data reception in the D2D communication receives the data on the D2D Link is transmitted.

Preferably, the DCI scrambled RNTI is a C-RNTI or a first RNTI or a third RNTI.

Preferably, the indication module is specifically configured to:

Transmitting a DCI received by the D2D link in a common search space of the PDCCH/EPDCCH; and/or transmitting, in a dedicated search space of the PDCCH/EPDCCH determined by the group RNTI of the user equipment, a user equipment indicating that data reception is performed in the D2D communication The DCI of the received data on the D2D Link.

Preferably, the RNTI of the DCI plus 4 is a group RNTI.

An embodiment of the present invention provides a network side device for data transmission, including a processor and a data transceiving interface, where: the processor is configured to: configure, in the RNTI and/or DCI for D2D communication, for the user equipment Information indicating domain; indicating a domain according to the information in the RNTI and/or DCI, indicating D2D communication in the N2D Link The user equipment communicating with the line communicates on the D2D Link;

The data transceiving interface is configured to implement communication between the processor and a user equipment.

A user equipment for data transmission provided by the embodiment of the present invention includes:

a determining module, configured to determine an information indication domain in the RNTI and/or DCI configured for the user equipment by the network side device for D2D communication;

The processing module is configured to receive the DCI, and perform D2D link communication according to the RNTI of the received DCI and/or the information indication field in the received DCI.

Preferably, the processing module is specifically configured to:

After receiving the DCI scrambled by the first RNTI for indicating that the user equipment communicates on the D2D link, performing D2D link communication; receiving a second RNTI scrambling for indicating that the user equipment performs data transmission on the D2D link After the DCI, the data is transmitted on the D2D link; after receiving the DCI scrambled by the third RNTI indicating that the user equipment performs data reception on the D2D link, data reception is performed on the D2D link.

Preferably, the processing module is specifically configured to:

Receiving data transmission on the D2D link after receiving the DCI scrambled DCI for instructing the user equipment to perform data transmission on the D2D link and the DCI for indicating the group RNTI scrambling for data reception in the D2D group communication After receiving the DCI for indicating the group RNTI scrambling for data reception in the D2D group communication, data reception is performed on the D2D link.

Preferably, the processing module is specifically configured to:

After receiving the DCI including the information indication field, if the information indication field indicates that the user equipment sends data on the D2D link, the data is sent on the D2D link; if the information indication field indicates that the user equipment receives on the D2D link Data, then data is received on the D2D link.

Preferably, the processing module is specifically configured to:

After receiving the DCI that includes the information indication field and is scrambled by the first RNTI for indicating that the user equipment communicates on the D2D link, if the information indication field indicates that the user equipment sends data, it is sent on the D2D link. Data; after receiving the DCI that contains the information indication field and is scrambled by the first RNTI for indicating that the user equipment communicates on the D2D link, if the information indication field indicates that the user equipment receives data, then on the D2D link Data reception.

Preferably, the processing module is specifically configured to:

Receiving, by the first RNTI, including the information indication field, and indicating that the user equipment communicates on the D2D link, and the information indicating that the user equipment sends data transmission, and receives the data. After the DCI scrambled by the group RNTI indicating data reception in the D2D group communication, data transmission is performed on the D2D link; upon receiving the DCI including the information indication field and scrambled by the C-RNTI of the user equipment, And the information indication field indicates that the user equipment sends data on the D2D link, and after receiving the DCI scrambled by the group RNTI for indicating data reception in the D2D group communication, performing data transmission on the D2D link; To the number used to indicate D2D group communication After receiving the DCI scrambled by the group RNTI, data reception is performed on the D2D link.

Preferably, the processing module is specifically configured to:

The DCI is received in a common search space of the PDCCH/EPDCCH and/or a PDCCH/EPDCCH-specific search space determined by the user equipment C-RNTI.

Preferably, the DCI scrambled RNTI is a C-RNTI or a first RNTI or a second RNTI or a third RNTI. Preferably, the processing module is specifically configured to:

Transmitting a DCI received by the D2D link in a common search space of the PDCCH/EPDCCH; and/or receiving, in a dedicated search space of the PDCCH/EPDCCH determined by the group RNTI of the user equipment, a user equipment indicating that data reception is performed in the D2D communication. The DCI of the received data on the D2D Link.

Preferably, the RNTI of the DCI plus 4 is a group RNTI.

An embodiment of the present invention provides a user equipment, where the user equipment includes a processor and a data transceiving interface, where: the processor is configured to: determine an RNTI configured for the user equipment by the network side device for D2D communication And/or the information indicating domain in the DCI; receiving the DCI, and performing D2D link communication according to the RNTI of the received DCI and/or the information indicating domain in the received DCI;

The data transceiver interface is configured to implement data transmission between the processor and the network side device and other user equipment. A system for data transmission provided by an embodiment of the present invention includes:

a network side device, configured to configure, by the user equipment, an information indication field in the RNTI and/or the DCI for D2D communication; instructing the domain according to the information in the RNTI and/or the DCI, indicating communication in the D2D communication on the N2D Link User equipment communicates on the D2D Link;

The user equipment is configured to receive the DCI, and perform D2D link communication according to the RNTI of the received DCI and/or the information indication field in the received DCI.

Since the network side device indicates the domain according to the information in the RNTI and/or the DCI, the user equipment that communicates in the D2D communication is indicated on the N2D Link to communicate on the D2D Link, and can be performed between the multiple user equipments in the cellular mobile communication network. The indication of D2D communication, thereby realizing D2D transmission, improves system performance. BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is a schematic diagram of a data flow of user equipment communication in a cellular network in the background art;

2 is a schematic diagram of a data flow of a direct connection communication of a user equipment in the background art;

3 is a schematic diagram of direct communication of user equipment according to an embodiment of the present invention;

4 is a schematic structural diagram of a system for data transmission according to an embodiment of the present invention;

5 is a schematic structural diagram of a network side device in a system for data transmission according to an embodiment of the present invention;

6 is a schematic structural diagram of user equipment in a system for data transmission according to an embodiment of the present invention; FIG. 7 is a schematic flowchart of a method for a network side device to configure data transmission for a user equipment according to an embodiment of the present invention; FIG. 8 is a schematic flowchart of a method for data transmission of a user equipment according to an embodiment of the present invention. In the embodiment of the present invention, the network side device indicates the domain according to the information in the RNTI and/or the DCI, and indicates on the N2D Link.

The user equipment communicating in the D2D communication communicates on the D2D Link, and can perform D2D communication indication between multiple user equipments under the cellular mobile communication network, thereby realizing D2D data transmission and improving system performance.

The D2D link in the embodiment of the present invention is a Device-to-Device Link (a straight-through link between user equipments); and the N2D Link is a network-to-device link (a network and a user equipment direct link).

As shown in Figure 3, the network side indicates that user equipment A transmits data on the D2D link on the N2D link. After receiving the indication from the network side device, user equipment A transmits data on the D2D link.

On the N2D link, the network side indicates that user equipment B transmits data on the D2D link. After receiving the indication from the network side device, user equipment B transmits data on the D2D link.

It should be noted that, in FIG. 3, two UEs perform D2D transmission, and may also be transmitted by multiple UEs as needed, for example, one UE transmits data, and multiple UEs receive data.

In the following description, the implementation of the cooperation between the network side and the user equipment side will be described first. Finally, the implementations from the network side and the user equipment side will be described separately, but this does not mean that the two must be implemented together. In fact, When the network side is implemented separately from the user equipment side, the problems existing on the network side and the user equipment side are also solved, but when the two are combined, a better technical effect is obtained.

As shown in FIG. 4, the system for data transmission in the embodiment of the present invention includes: a network side device 10 and a user equipment 20. The network side device 10 is configured to configure, for the user equipment, an RNTK Radio Network Temporary Identifier for D2D communication, a wireless network temporary identifier, and/or a DCI (Downlink Control Information) information indicating domain, according to the RNTI and Or the information indicating field in the DCI, the user equipment that communicates in the D2D communication on the network and the user equipment through link N2D Link communicates on the direct link D2D Link between the user equipments; the user equipment 20 is used to determine the network The side device is an information indication field in the RNTI and/or DCI configured for the user equipment for D2D communication; receiving the DCI, and performing the domain according to the RNTI of the received DCI and/or the information indication field in the received DCI D2D link communication.

In the implementation, when the network side device configuration information indicates the domain, the configuration may be explicitly or implicitly configured. The explicit mode is to send an information notification; the implicit mode is to use the D2D transmission mode, that is, to notify the user equipment 20 to use D2D transmission, and the user equipment knows that there is an information indication field in the DCI, and the meaning of the bit value in the information indication field can be preset. It can also be passed by the network side.

There are many types of network side device configuration, which are described separately below. Configuration 1: The network side device may configure a first RNTI for the user equipment to indicate that the user equipment communicates on the D2D link, and if the network side device needs to notify the user equipment to perform D2D communication, the first RNTI may be used to scramble the DCI. After being sent to the user equipment, the corresponding user equipment receives the DCI scrambled by the first RNTI, and then knows that the communication is performed on the D2D. Alternatively, the network side device configures the user equipment to indicate that the user equipment sends data on the D2D link. a second RNTI, and/or a third RNTI for indicating that the user equipment performs data reception on the D2D link, if the network side device needs to notify the user equipment to send data in the D2D, the second RNTI may be used to scramble the DCI and then send the After receiving the DCI scrambled by the second RNTI, the user equipment knows that the data is transmitted on the D2D. If the data needs to be received, the third RNTI is used for scrambling.

Correspondingly, after receiving the DCI scrambled by the first RNTI for indicating that the user equipment communicates on the D2D link, the user equipment performs D2D link communication;

After receiving the DCI scrambled by the second RNTI for indicating data transmission by the user equipment on the D2D link, the user equipment performs data transmission on the D2D link.

After receiving the DCI scrambled by the third RNTI indicating that the user equipment performs data reception on the D2D link, the user equipment performs data reception on the D2D link.

If the network side device only indicates that the user equipment communicates on the D2D link, the user equipment may send or receive data by itself; or the network side device may use another RNTI or the information indication field to instruct the user equipment to send or receive data. It should be noted that other embodiments that enable the user equipment to determine transmission or reception are also applicable to the embodiments of the present invention.

Configuration 2: The network side device may configure, for the user equipment, a group RNTI for indicating data reception in the D2D group communication, so that the user equipment only receives broadcast or multicast information on the D2D link; and/or one for indicating The second RNTI that the user equipment performs data transmission on the D2D link.

Correspondingly, after receiving the second RNTI scrambled DCI for indicating that the user equipment performs data transmission on the D2D link, and the DCI for indicating the group RNTI scrambling for data reception in the D2D group communication, the user equipment is in D2D. Send data on the link;

Configuration 3: The information indication field in the DCI is used to indicate that the user equipment sends or receives data on the D2D link. The bit value corresponding to the information indicating field indicates different meanings, for example: the information indicating field may be 2-bit information, the MSB is used to indicate whether it is scheduling for the N2D link or the scheduling for the D2D link, 0 is the communication of the N2D link, and 1 is the D2D link communication. The LSB is used to indicate whether the D2D link is sent or received, 0 for reception, and 1 for transmission. After the corresponding user equipment receives the DCI information indicating field as 11, it knows to send it on the D2D link.

Configuration 4: The information indication field in the DCI is used to indicate that the user equipment is transmitting or receiving data. The bit value corresponding to the information indication field indicates different meanings, for example, 1 is transmission, and 0 is reception. If the network side device needs to notify the user equipment to send in D2D, the information indication field may be set to 1, and the corresponding user equipment receives the DCI. Information indication field is 1 After that, you know that it is sent on D2D.

Correspondingly, after receiving the DCI including the information indication field, if the information indication field indicates that the user equipment sends data on the D2D link, the user equipment sends data on the D2D link; if the information indication field indicates that the user equipment is on the D2D link When receiving data, the data is received on the D2D link.

Configuration 5: The network side device configures a first RNTI for the user equipment to indicate that the user equipment communicates on the D2D link; the information indication field in the DCI is used to indicate that the user equipment sends or receives data. The bit value corresponding to the information indication field indicates different meanings, for example, 1 is transmission, and 0 is reception. If the network side device needs to notify the user equipment to send in D2D, the information indication field may be set to 1, and the corresponding user equipment receives the first After the information indicating field of an RNTI scrambled DCI is 1, it is known to transmit on the D2D. That is, the information indication field is added to the DCI scrambled by the first RNTI, thereby achieving the purpose of combining the indication of the RNTI and the information indication field.

Correspondingly, after the user equipment receives the DCI scrambled by the first RNTI, which is used by the user equipment to indicate that the user equipment is communicating on the D2D link, if the information indication field indicates that the user equipment sends data, the D2D link is Send data on;

After receiving the DCI scrambled by the first RNTI indicating that the user equipment communicates on the D2D link, the user equipment performs data on the D2D link if the information indication field indicates that the user equipment receives the DCI. receive.

Configuration 6: The network side device configures, for the user equipment, a group RNTI for indicating data reception in the D2D group communication, so that the user equipment only receives broadcast or multicast information on the D2D link; and/or the information indication in the DCI The field is used to indicate that the user equipment sends or receives data on the D2D link.

Correspondingly, the user equipment receives the DCI that is included in the information indicating field and is scrambled by the first RNTI for indicating that the user equipment communicates on the D2D link, and the information indicating field indicates that the user equipment sends data, and receives the data. After receiving the DCI scrambled by the received group RNTI in the D2D group communication, performing data transmission on the D2D link; the user equipment receives the DCI including the information indication field and being scrambled by the C-RNTI of the user equipment, and The information indication field indicates that the user equipment receives data on the D2D link, and receives the DCI scrambled by the group RNTI for receiving the reception in the D2D group communication, and performs data reception on the D2D link;

After receiving the DCI scrambled by the group RNTI for receiving the reception in the D2D group communication, the user equipment performs data reception on the D2D link.

The network side device indicates the domain according to the information in the RNTI and/or the DCI, and the user equipment that performs data transmission in the D2D communication on the N2D Link transmits the data on the D2D Link; the domain is indicated according to the information in the RNTI and/or the DCI. A user equipment indicating data reception in D2D communication on the N2D Link receives data on the D2D Link.

The network device indicates that the user equipment that performs data transmission in the D2D communication on the N2D Link is in the D2D.

When the data is transmitted on the Link, the user equipment that performs data transmission in the D2D communication may be transmitted in the PDCCH/EPDCCH-specific search space determined by the PDCCH/EPDCCH in the common search space and/or the user equipment C-RNTI. The DCI of the data sent on the D2D Link.

The DCI scrambled RNTI may be a C-RNTI or a first RNTI or a second RNTI.

Correspondingly, the user equipment receives the DCI indicating D2D communication in a common search space of the PDCCH/EPDCCH and/or a PDCCH/EPDCCH-specific search space determined by the user equipment C-RNTI.

The network device indicates that the user equipment that performs data reception in the D2D communication on the N2D Link is in the D2D.

When transmitting and receiving on the Link, the user equipment that performs data reception in the D2D communication may receive the data on the D2D Link in the PDCCH/EPDCCH-specific search space determined by the PDCCH/EPDCCH in the common search space and/or the user equipment C-RNTI. DCI.

The DCI scrambled RNTI is a C-RNTI or a first RNTI or a third RNTI.

Correspondingly, the user equipment is determined in the common search space of the PDCCH/EPDCCH and/or the user equipment C-RNTI

The DCI is received in the PDCCH/EPDCCH exclusive search space.

The network side device indicates, on the N2D Link, that the user equipment that performs data reception in the D2D communication transmits the DCI received by the D2D link in the common search space of the PDCCH/EPDCCH when receiving the data on the D2D Link; and/or in the user equipment. In the dedicated search space of the PDCCH/EPDCCH determined by the group RNTI, the DCI indicating that the user equipment performing data reception in the D2D communication receives the data on the D2D Link is transmitted.

The RNTI of DCI plus 4 is a group RNTI.

Correspondingly, the user equipment transmits the DCI received by the D2D link in a common search space of the PDCCH/EPDCCH; and/or receives the DCI in a dedicated search space of the PDCCH/EPDCCH determined by the group RNTI of the user equipment.

In the above six configurations, some or all of the configuration modes may be selected as needed, or may be combined in various configurations. For example, the first RNTI in configuration one and the DCI in configuration five can be used in combination.

When the network side device indicates that the user equipment transmits data on the D2D Link or the N2D Link, the following scheme can be used:

The network side device indicates the domain according to the information in the RNTI or DCI of the DCI, and indicates that the user equipment that needs to be transmitted on the D2D Link is transmitted on the D2D Link on the N2D Link.

Correspondingly, the user equipment determines to transmit on the D2D Link according to the information indicating field in the RNTI or DCI of the scrambled DCI.

Scheme 1: Differentiated by RNTI (The disadvantage of this scheme is that it is equivalent to one UE allocating multiple RNTIs, resulting in waste of RNTI resources):

For the data transmission and scheduling of the scheduled N2D link, the signaling of the data transmission of the D2D link uses different RNTI identifiers, for example: The RNTI for the N2D link can be the C-RNTI (C Radio Radio Network) under normal circumstances.

Temporary Identifier, the RNTI for the D2D link, may be a specific RNTI or a RNTI configured on the network side, such as D2D-C-RNTI. In this way, the user equipment passes the received scheduling signaling.

The RNTI can determine whether the current scheduling signaling indicates the data transmission of the N2D link or the number of D2D links. According to transmission.

In LTE Rel-8/9/10/11 and subsequent LTE-based systems, scheduling signaling may be common through PDCCH (Physical Downlink Control Channel) / EPDCCH (Enhanced Physical Downlink Control Channel) The search space and the UE (User Equipment)-specific search space determined by the C-RNTI on the N2D link are transmitted.

In this scheme, the scheduling signaling can follow the bit length of the DCI format already existing in LTE Rel-8/9/10/11, which does not increase the number of blind detections of user equipment.

Specifically, the network side device sends, on the N2D Link, the first RNTI scrambled DCI corresponding to the user equipment that needs to transmit data on the D2D Link to the user equipment that needs to be transmitted on the D2D Link.

Correspondingly, after receiving the DCI scrambled by the first RNTI corresponding to the user equipment that transmits the data on the D2D Link, the user equipment determines to perform data transmission on the D2D Link.

In an implementation, the network side device is in the physical downlink control channel PDCCH/enhanced physical downlink control channel EPDCCH common search space and/or the PDCCH/EPDCCH exclusive search space determined according to the C-RNTI of the user equipment that needs to transmit data on the D2D Link. And transmitting the DCI scrambled by the first RNTI corresponding to the user equipment.

Correspondingly, the user equipment is scrambled by the first RNTI corresponding to the user equipment in the PDCCH/EPDCCH common search space and/or the PDCCH/EPDCCH-specific search space determined according to the C-RNTI of the user equipment that needs to transmit data on the D2D Link. DCI.

Scenario 2: Differentiate the way that the information indicates the domain by adding the existing scheduling signaling (this method is likely to cause an increase in the number of blind detections):

If the user equipment is configured to perform D2D transmission, an information indicating field is fixedly added to the scheduling signaling to indicate whether the current scheduling signaling is used for scheduling the N2D link or scheduling the D2D link. Here, the size of the information indicating field may be 1 bit or 2 bits. In LTE Rel-11 and subsequent LTE-based systems, for the scheduling signaling transmitted through the EPDCCH, the added information indication field may be 1 bit (the EPDCCH has no DCI ambiguity bit padding), and the example 3⁄4 port: 0 indicates N2D link, 1 Represents a D2D link.

For the LTE Rel-8 and the subsequent LTE-based signaling, the information indicated by the PDCCH may be 2 bits (the PDCCH needs to consider the 1-bit padding in the case of the ambiguous bit), for example: 00 N2D link, 11 indicates D2D link. In the manner of adding the information indicating the domain distinguishing by the scheduling signaling, the signaling for scheduling the data transmission of the N2D link and scheduling the data transmission of the D2D link may use the same RNTI identifier, that is, the C-RNTI.

In the LTE Rel-8/9/10/11 and subsequent LTE-based systems, in the common search space of the PDCCH/EPDCCH, the DCI length and scheduling of the user equipment that schedules the traditional N2D transmission (ie, only supports N2D transmission) The DCI length of the user equipment transmitted by N2D+D2D is different (as shown in scheme 2), then the corresponding scheduling signaling transmission methods are as follows: 2.1: The N2D transmission of the N2D+D2D user equipment is scheduled in the common search space of the EPDCCH/PDCCH. The DCI format is the same as the traditional DCI format, and does not include the added information indication field in the scheme 2.

In the user equipment-specific search space determined by the C-RNTI of the EPDCCH/PDCCH, the DCI format of the transmission is the DCI format of the information indication domain added in the scheme 2, which can schedule the transmission of the N2D or the D2D. transmission. (This method does not increase the number of additional blind checks, but reduces the number of candidates for blind detection).

Method 2.2: Add a DCI format for blind detection in the public space, that is, increase the DCI format of the information indication field in scheme 2. In the user-defined search space, the DCI format transmitted by the user is the DCI format of the information indication domain added in scheme 2, which can schedule both N2D transmission and D2D transmission. (This method increases the number of blind checks for additional public space, but the number of additions is relatively small. According to the definition of the existing search space, only 6 blind detections are added).

Specifically, the different bit value representation of the first information indication field is used to indicate whether to transmit data on the D2D Link or to transmit data on the N2D Link; the network side device sends the inclusion on the N2D Link to the user equipment that needs to be transmitted on the D2D Link. The first information indicating the transmission of data on the D2D Link indicates the DCI of the domain.

Correspondingly, after receiving, by the user equipment, the DCI including the first information indication field for indicating data transmission on the D2D Link, the user equipment determines to perform data transmission on the D2D Link.

In an implementation, the PDCCH/EPDCCH-specific search space determined by the network side device in the PDCCH/EPDCCH common search space and/or according to the C-RNTI of the user equipment that needs to transmit data on the D2D Link, and the transmission includes indication for indicating on the D2D Link. The first information of the transmitted data indicates the DCI of the domain.

Correspondingly, the user equipment receives the DCI including the first information indication field for indicating the data transmission on the D2D Link in the PDCCH/EPDCCH common search space and/or the PDCCH/EPDCCH-specific search space determined according to the C-RNTI of the user equipment. .

When the network side device indicates whether the user equipment is transmitting data or receiving data, the following scheme may be adopted: the network side device indicates the domain according to the information in the RNTI or DCI of the scrambled DCI, and indicates that the data needs to be sent on the D2D Link on the N2D Link. The user equipment transmits data and receives on the N2D Link a user equipment that needs to receive data on the D2D Link.

Correspondingly, the user equipment determines the transmission data or the reception data according to the information indicating field in the RNTI or DCI of the scrambled DCI.

Option 1: Use RNTI to distinguish between the receiving and sending of user equipment.

Configure multiple RNTIs for D2D user equipment (that is, user equipments that can perform D2D and N2D), for example:

The scheduling signaling of the D2D-TX-RNTI identifier is D2D transmission, and the scheduling signaling of the D2D-RX-RNTI identifier is D2D reception. A D2D user equipment can simultaneously configure one (or more) D2D-TX-RNTI and D2D-RX-RNTI.

When a group of UEs performs group communication, multiple RNTIs can be configured for each user equipment, for example: D2D-TX-RNTI, which is used to identify the D2D user equipment for transmission, and one configuration is D2D-group-RX-RNTI, which is used to identify the UE in the group for receiving, when the user equipment in the group receives the D2D-TX at the same time. When the scheduling signaling of the RNTI and the D2D-group-RX-RNTI is identified, the scheduling signaling identified by the D2D-TX-RNTI covers the scheduling signaling identified by the D2D-group-RX-RNTI.

In this scheme, the scheduling signaling can follow the DCI bit length already existing in LTE Rel-8/9/10/11, which does not increase the number of blind detections of user equipment.

Specifically, the network side device sends a DCI scrambled by the second RNTI indicating that the user equipment transmits on the D2D link to the user equipment that needs to send data on the D2D link on the N2D Link; and needs to be in the D2D Link on the N2D Link. The user equipment that receives the data sends a DCI that is used to indicate that the user equipment receives the third RNTI on the D2D link.

Correspondingly, if the user equipment receives the DCI scrambled by the second RNTI corresponding to the user equipment that sends the data, the N2D Link determines to send the data;

If the user equipment receives the DCI scrambled by the third RNTI corresponding to the user equipment that receives the data on the N2D Link, the received data is determined.

In an implementation, the network side device sends the second RNTI scrambled DCI corresponding to the user equipment, where: the network side device is in the physical downlink control channel PDCCH/enhanced physical downlink control channel EPDCCH common search space and/or according to the D2D link. The PDCCH/EPDCCH-specific search space determined by the C-RNTI of the user equipment that needs to send data, and the DCI that is scrambled by the second RNTI corresponding to the user equipment;

The network side device sends the third RNTI scrambled DCI corresponding to the user equipment, including:

The PDCCH/EPDCCH-specific search space transmission determined by the network side device in the physical downlink control channel PDCCH/enhanced physical downlink control channel EPDCCH common search space and/or according to the C-RNTI of the user equipment that needs to receive data on the D2D Link, by the user The third RNTI scrambled DCI corresponding to the device.

Correspondingly, the user equipment receives the DCI scrambled by the second RNTI corresponding to the user equipment, including:

The user equipment receives the second RNTI scrambled by the user equipment in the physical downlink control channel PDCCH/enhanced physical downlink control channel EPDCCH common search space and/or the PDCCH/EPDCCH-specific search space determined according to the C-RNTI of the user equipment. DCI;

The user equipment receives the third RNTI scrambled DCI corresponding to the user equipment, including:

The user equipment receives the third RNTI scrambled by the user equipment in the physical downlink control channel PDCCH/enhanced physical downlink control channel EPDCCH common search space and/or the PDCCH/EPDCCH-specific search space determined according to the C-RNTI of the user equipment. DCI.

Scenario 2: By adding an information indicating field in the scheduling signaling, the indication field indicates whether the current scheduling signaling indicates whether to receive or transmit. Here, the size of the information indicating field may be 1 bit or 2 bits.

LTE Rel-11 and subsequent scheduling signaling based on EPDCCH transmission in the LTE system, the increase The information indication field may be 1 bit (the EPDCCH has no padding of DCI ambiguous bits), for example: 0 for reception and 1 for transmission.

For the LTE Rel-8 and the subsequent LTE-based signaling, the information indicated by the PDCCH may be 2 bits (the PDCCH needs to consider the 1-bit padding in the case of the ambiguous bit), for example: 00 Receive, 11 means send.

When a group of user equipments performs group communication, the scheduling signaling used to schedule the sending of the user equipment is used to indicate that the signaling used to indicate reception or transmission in the current signaling is set to the transmitting state, and the scheduling is performed in the group communication. The scheduling signaling received by other user equipments is used to indicate that the signaling used to indicate reception or transmission in the current signaling is set to the receiving state.

Specifically, the second information indicating the sending data indicates that different bit values of the domain indicate whether to send data or receive data; and the network side device sends, on the N2D Link, the user equipment that needs to be sent on the D2D Link, for indicating the sending data. The second information indicates the DCI of the domain; the DCI containing the second information indicating field for indicating the received data is transmitted on the N2D Link to the user equipment that needs to be received on the D2D Link.

Correspondingly, if the user equipment receives the DCI including the second information indication field for indicating the transmission data on the N2D Link, determining to send the data;

If the user equipment receives the DCI including the second information indication field for indicating the received data on the N2D Link, it determines to receive the data.

In an implementation, the network side device sends the DCI including the second information indication field for indicating the transmission data, including: the network side device in the PDCCH/EPDCCH common search space and/or according to the user equipment that needs to send data on the D2D Link. a PDCCH/EPDCCH-specific search space determined by the C-RNTI, where the transmission includes a DCI indicating a second information indication field of the transmitted data;

The network side device sends a DCI including a second information indicating field for indicating the received data, including:

The PDCCH/EPDCCH-specific search space determined by the network side device in the PDCCH/EPDCCH common search space and/or according to the C-RNTI of the user equipment that needs to receive data on the D2D Link, and the second information indication field for indicating the received data DCI.

Correspondingly, the user equipment receives the DCI including the second information indication field for indicating the transmission data, including: the PDCCH/EPDCCH-specific search space determined by the user equipment in the PDCCH/EPDCCH common search space and/or according to the C-RNTI of the user equipment. Receiving, by the user equipment, a DCI including a second information indicating domain for indicating the sending data, where the user equipment receives the DCI including the second information indicating domain for indicating the received data, including:

The user equipment receives the DCI including the second information indication field for indicating the received data in the PDCCH/EPDCCH common search space and/or the PDCCH/EPDCCH-specific search space determined according to the C-RNTI of the user equipment.

According to the above content, in the implementation, the network side device has the following four processing methods:

Mode 1: The network side device can indicate whether the user equipment is in the D2D Link or the N2D according to the RNTI of the scrambled DCI.

Transmitting data on the Link; and if the data is transmitted on the D2D Link, whether the user equipment transmits data or receives data; Manner 2: The network side device may further indicate, according to the information indication field in the DCI, whether the user equipment transmits data on the D2D Link or the N2D Link; and if the data is transmitted on the D2D Link, whether the user equipment sends data or receives data;

Manner 3: The network side device may further indicate, according to the RNTI of the scrambled DCI, the user equipment to transmit data on the D2D Link or the N2D Link; and indicate, according to the information indication field in the DCI, whether the user equipment sends data or receives data;

Mode 4: The network side device may further indicate, according to the information indication field in the DCI, the user equipment to transmit data on the D2D Link or the N2D Link; and indicate, according to the RNTI of the scrambling DCI, whether the user equipment sends data or receives data, of course, this manner In fact, the above two indications can be completed through one RNTI, so this method will waste resources.

The following is a detailed description of the foregoing method 1 to mode 3. The fourth method is similar to the above manners 1 to 3, and will not be described again.

Manner 1: The network side device indicates, according to the RNTI of the DCI, the user equipment that is sent in the D2D transmission on the N2D Link to send data on the D2D Link, and the user equipment that receives the reception in the D2D transmission receives the data on the D2D Link.

Specifically, the user equipment that is sent by the network side device to the D2D transmission on the N2D Link sends a DCI scrambled by the second RNTI corresponding to the user equipment that sends the data on the D2D Link, and is forwarded on the N2D Link. The user equipment that performs the receiving in the D2D transmission sends a DCI that is used to indicate the third RNTI scrambling corresponding to the receiving user equipment that receives the data on the D2D Link;

Correspondingly, if the user equipment receives the DCI scrambled by the second RNTI corresponding to the user equipment that sends the data on the D2D Link on the N2D Link, the data is sent on the D2D Link;

If the user equipment receives the DCI scrambled by the third RNTI corresponding to the user equipment receiving the data received on the D2D Link on the N2D Link, the data is received on the D2D Link.

The second RNTI corresponding to the user equipment for transmitting the data on the D2D Link is: a second RNTI for indicating that the data is transmitted on the D2D Link, and the second RNTI is performed. The second RNTI corresponding to the sent user equipment. Subsequent similar descriptions will not be repeated.

In an implementation, the network side device is scrambled by the second RNTI corresponding to the user equipment that performs the transmission in the PDCCH/EPDCCH common search space and/or the PDCCH/EPDCCH-specific search space determined according to the C-RNTI of the user equipment that transmits the data. DCI; DCI scrambled by the third RNTI corresponding to the user equipment receiving the data in the PDCCH/EPDCCH common search space and/or the PDCCH/EPDCCH-specific search space determined according to the C-RNTI of the user equipment receiving the data;

Correspondingly, the user equipment is in the PDCCH/EPDCCH common search space and/or according to the user equipment that sends the data.

The PDCCH/EPDCCH-specific search space determined by the C-RNTI receives the second corresponding to the user equipment that performs the transmission. RNTI plus 4 especially DCI;

The user equipment receives the DCI scrambled by the third RNTI corresponding to the receiving user equipment in the PDCCH/EPDCCH common search space and/or the PDCCH/EPDCCH-specific search space determined according to the C-RNTI of the user equipment receiving the data.

The DCI scrambled by the second RNTI and the DCI scrambled by the third RNTI may be sent simultaneously or separately.

Preferably, if the group D2D communication is performed, the network device sends a second RNTI scrambling corresponding to the user equipment that sends the data on the D2D Link to the user equipment that is sent in the D2D transmission in the group on the N2D Link. The DCI is sent to all the user equipments in the group to indicate the DCI scrambled by the group RNTI corresponding to the group receiving the data on the D2D Link, so that the user equipment sending the data in the group sends the data on the D2D Link. Other user equipments in the group receive data on the D2D Link.

Correspondingly, if group D2D communication is performed, the user equipment receives, on the N2D Link, a DCI that is used to indicate the second RNTI scrambling corresponding to the user equipment that transmits data on the D2D Link, and is used to indicate that the data is received on the D2D Link. After the DCI scrambled by the group RNTI corresponding to the group, the data is sent on the D2D Link; that is, if the DCI scrambled by the second RNTI corresponding to the user equipment is received, the processing is performed only according to the indication of the second RNTI;

If the group D2D communication is performed, the user equipment N2D Link receives the DCI scrambled by the group RNTI corresponding to the group receiving the data on the D2D Link, and then receives the data on the D2D Link.

The DCI scrambled by the second RNTI and the DCI scrambled by the group RNTI may be sent simultaneously or separately.

For the group D2D communication, the network side device sends the second RNTI scrambled DCI corresponding to the user equipment and the group RNTI corresponding to the group plus the DCI of the group, including:

The PDCCH/EPDCCH-specific search space transmitted by the network side device in the PDCCH/EPDCCH common search space and/or according to the C-RNTI of the user equipment that needs to transmit data on the D2D Link transmits the second corresponding to the user equipment.

The DCI scrambled by the RNTI; transmits the DCI scrambled by the group RNTI corresponding to the group in the PDCCH/EPDCCH common search space and/or the PDCCH/EPDCCH-specific search space determined according to the group RNTI corresponding to the group.

The network side device is determined in the PDCCH/EPDCCH common search space and/or the C-RNTI of the user equipment.

The PDCCH/EPDCCH-specific search space transmits a DCI scrambled by the second RNTI corresponding to the user equipment;

The user equipment receives the group RNTI scrambled DCI corresponding to the group, including:

The network side device is determined in the PDCCH/EPDCCH common search space and/or according to the group RNTI

The PDCCH/EPDCCH-specific search space transmits the DCI scrambled by the group RNTI corresponding to the group.

For mode 1, if group D2D communication is not performed, the network side device needs to configure three for the user equipment.

RNTI, that is, the C-RNTI indicates that the N2D transmission is performed, and the D2D-TX-RNTI is used to indicate that the data is transmitted on the D2D. The D2D-RX-RNTI is used to indicate that data is received on the D2D.

If the group D2D communication is performed, the network side device needs to configure three RNTIs for the user equipment, that is, the C-RNTI indicates that the N2D transmission is performed, and the D2D-TX-RNTI is used to indicate that the data is transmitted on the D2D, the D2D-group-RX-RNTI It is used to indicate that the user equipment in the group receives data on the D2D.

Manner 2: The network side device indicates the domain according to the information in the DCI, and the user equipment that transmits the D2D transmission on the N2D Link transmits the data on the D2D Link, and the user equipment that receives the reception in the D2D transmission receives the data on the D2D Link. .

Specifically, the network side device sends, by using an N2D Link, a DCI that includes a first information indication field for indicating data transmission on the D2D Link and a second information indication field for indicating transmission data, to the user equipment that is sent in the D2D transmission. Transmitting, by the N2D Link, a DCI including a first information indication field for indicating transmission of data on the D2D Link and a second information indication field for indicating reception of data to the user equipment receiving the D2D transmission;

Correspondingly, if the user equipment receives, by using the N2D Link, a first information indication field for indicating data transmission on the D2D Link and a DCI for indicating a second information indication field for transmitting data, transmitting data on the D2D Link; If the user equipment receives the first information indication field indicating the data transmission on the D2D Link and the DCI indicating the second information indication field of the received data through the N2D Link, the data is received on the D2D Link.

In an implementation, the network side device transmits, by using the EPDCCH, a first information indication field for indicating transmission of data on the D2D Link and a DCI indicating a second information indication field for transmitting data, and the PDCCH transmission includes indication for indicating in D2D. a first information indication field for transmitting data on the Link and a DCI indicating a second information indicating field of the received data; or transmitting, by the PDCCH, a first information indication field for indicating transmission of data on the D2D Link and for indicating transmission The second information of the data indicates the DCI of the domain, and the DCI transmission includes a first information indication field for indicating transmission of data on the D2D Link and a DCI for indicating a second information indication field of the received data;

Correspondingly, the user equipment receives, by using the EPDCCH, a first information indication field, which is used to indicate that the data is transmitted on the D2D Link, and a DCI, which is used to indicate the second information indication field of the transmission data, or is received by the PDCCH, and is included for indicating on the D2D Link. a first information indication field of the transmission data and a DCI indicating a second information indication field of the transmission data; the user equipment receiving, by using the EPDCCH, a first information indication field for indicating transmission of data on the D2D Link and indicating the received data The second information indicates the DCI of the domain; or receives, by the PDCCH, a DCI including a first information indication field and a second information indication field indicating the received data.

The PDCCH/EPDCCH-specific search space transmission determined by the network side device in the PDCCH/EPDCCH common search space and/or according to the C-RNTI of the user equipment that needs to transmit data on the D2D Link includes the information for indicating that the data is transmitted on the D2D Link. a first information indication field and a DCI indicating a second information indication field of the transmission data; the network side device is determined in a PDCCH/EPDCCH common search space and/or according to a C-RNTI of a user equipment that needs to receive data on the D2D Link PDCCH/EPDCCH-specific search space transmission is included for indication in D2D

a first information indication field for transmitting data on the link and a DCI indicating a second information indicating field of the received data; Correspondingly, the user equipment receives, in the PDCCH/EPDCCH common search space and/or the PDCCH/EPDCCH-specific search space determined according to its own C-RNTI, a first information indication field for indicating transmission of data on the D2D Link and for indicating The second information of the sent data indicates the DCI of the domain;

The user equipment receives, in a PDCCH/EPDCCH common search space and/or a PDCCH/EPDCCH-specific search space determined according to its own C-RNTI, a first information indication field for indicating transmission of data on the D2D Link and for indicating reception of data. The second information indicates the DCI of the domain.

Wherein, a first information indication field for indicating transmission of data on the D2D Link and a DCI for indicating a second information indication field for transmitting data and a first information indication field for indicating transmission of data on the D2D Link are included The second information indicating the received data indicates that the DCI of the domain may be transmitted simultaneously or separately.

a first information indication field for indicating transmission of data on the D2D Link, a second information indication field for indicating transmission of data, and a second information indication field for indicating reception of data may be newly added information indicating fields in the DCI The bit value may also be a new value in the bit value in the information indicating field in the existing information in the DCI.

For example, two information indication fields are added to the DCI, and the first information indicates whether the field indicates D2D or N2D transmission, and the second information indicates whether the field indicates transmission or reception.

Assuming that each information indication field is 1 bit, the first information indicates that 0 indicates D2D in the field, 1 indicates N2D; the second information indicates that 0 indicates transmission in the domain, and 0 indicates reception, if the network side device sends the signal on the D2D. The user equipment indicates that the first information indicates that the domain is 0 (ie, the first information indicates the domain), and the second information indicates that the domain is 1 (ie, the second information indicating the data is used to indicate the domain); The side device indicates to the user equipment received on the D2D, and the first information indicates that the domain is 0 (ie, the first information indication field), and the second information indicates that the domain is 0 (ie, the second is used to indicate the received data). Information indicates the domain).

Preferably, if the group D2D communication is performed, the network device sends a first information indication field for indicating the transmission of data on the D2D link to the user equipment that transmits the D2D transmission in the group on the N2D Link and is used for The second information indicating the transmission data indicates the DCI of the domain, and sends a first information indication field for indicating that the data is transmitted on the D2D Link and a second information indication field for indicating the received data to all user equipments in the group. DCI, so that the user equipment that sends data in the group sends data on the D2D Link, and other user equipments in the group receive data on the D2D Link.

Correspondingly, the user equipment receives, on the N2D Link, a first information indication field for indicating data transmission on the D2D Link and a DCI for indicating a second information indication field for transmitting data, and receiving the inclusion for indicating

After the first information indication field of the data transmitted on the D2D Link and the DCI of the second information indication field for indicating the received data, the data is transmitted on the D2D Link; that is, if the reception is included to indicate the transmission on the D2D Link The first information indication field of the data and the DCI of the second information indication field for indicating the transmission data are processed only according to the indication of the first information indication field and the second information indication field for indicating the transmission data;

The user equipment receives a first information indication on the N2D Link that is used to indicate that data is transmitted on the D2D Link After the domain and the second information indicating the received data indicate the DCI of the domain, the data is received on the D2D Link.

In an implementation, the network side device sends a DCI that includes a first information indication field for indicating data transmission on the D2D Link and a second information indication field for indicating data to be sent, including:

The PDCCH/EPDCCH-specific search space transmission determined by the network side device in the PDCCH/EPDCCH common search space and/or according to the C-RNTI of the user equipment that needs to transmit data on the D2D Link includes a first indication for transmitting data on the D2D Link The information indication field and the second information indicating the transmission of the data indicate the DCI of the domain;

The network side device sends a DCI including a first information indication field for indicating data transmission on the D2D Link and a second information indication field for indicating the received data, including:

The network side device transmits the DCI including the first information indication field and the second information indication field indicating the received data in the PDCCH/EPDCCH common search space and/or the PDCCH/EPDCCH-specific search space determined according to the C-RNTI of the group.

Correspondingly, the user equipment receives the DCI including the first information indication field for indicating data transmission on the D2D Link and the second information indication field for indicating the transmission data, including:

The user equipment receives, in a PDCCH/EPDCCH common search space and/or a PDCCH/EPDCCH-specific search space determined according to a C-RNTI of the user equipment, a first information indication field for indicating transmission of data on the D2D Link and for indicating transmission data. The second information indicates the DCI of the domain;

The user equipment receives a DCI including a first information indication field for indicating data transmission on the D2D Link and a second information indication field for indicating the received data, including:

The user equipment receives, in the PDCCH/EPDCCH common search space and/or the PDCCH/EPDCCH-specific search space determined according to the C-RNTI of the group, a first information indication field for indicating transmission of data on the D2D Link and for indicating reception data. The second information indicates the DCI of the domain.

For the second mode, the first information indicating domain and the second information indicating domain may also be combined into one information indicating domain. By adding the information indicating the number of domain bits, the information indicating the field clock indicates that the communication is on the D2D or the N2D, and the indication is Send or receive. For example, two bits, 00 means to communicate on N2D, 01 means to send on D2D, and 10 means to receive on D2D.

Manner 3: The network side device indicates the domain according to the information in the RNTI and the DCI of the scrambling DCI, and indicates, on the N2D Link, the user equipment that is sent in the D2D transmission to send data on the D2D Link, and the user equipment that indicates the reception in the D2D transmission. Receive data on the D2D Link.

Specifically, the network side device sends, on the N2D Link, the first RNTI corresponding to the user equipment that is used to transmit the data on the D2D link, and is included in the indication, and includes Transmitting the second information of the data indicating the DCI of the domain; and transmitting, on the N2D Link, the first RNTI scrambled by the user equipment receiving the D2D transmission to indicate that the receiving user equipment transmitting the data on the D2D Link corresponds to the receiving And including a DCI indicating a second information indicating domain of the received data; Correspondingly, if the user equipment receives, on the N2D Link, the first RNTI scrambling corresponding to the transmitting user equipment indicating that the data is transmitted on the D2D Link, and includes the DCI indicating the second information indicating field of the transmission data. , then send data on the D2D Link;

If the user equipment receives the first RNTI scrambling corresponding to the receiving user equipment for transmitting data on the D2D Link on the N2D Link, and includes the DCI indicating the second information indicating field of the received data, Receive data on the D2D Link.

In an implementation, the network side device transmits, in the PDCCH/EPDCCH common search space and/or the PDCCH/EPDCCH-specific search space determined according to the C-RNTI of the user equipment that transmits the data, the user for transmitting the data for indicating transmission on the D2D Link. The first RNTI corresponding to the device is scrambled, and includes a DCI indicating a second information indicating domain for transmitting data;

The network side device transmits, in the PDCCH/EPDCCH common search space and/or the PDCCH/EPDCCH-specific search space determined according to the C-RNTI of the user equipment that receives the data, the first corresponding to the user equipment that indicates that the data is transmitted on the D2D Link. An RNTI is scrambled and includes a DCI indicating a second information indicating domain of the received data.

The PDCCH/EPDCCH-specific search space determined by the C-RNTI receives a first RNTI scrambling corresponding to the transmitting user equipment indicating that the data is transmitted on the D2D Link, and includes a DCI indicating a second information indicating field of the transmitted data. ;

The user equipment receives, in the PDCCH/EPDCCH common search space and/or the PDCCH/EPDCCH-specific search space determined according to the C-RNTI of the user equipment that receives the data, the first corresponding to the user equipment that indicates that the data is transmitted on the D2D Link. The RNTI scrambles and includes a DCI indicating the second information indicating the received data.

Wherein, the DCI is scrambled by the first RNTI, and the DCI of the second information indication field for indicating the transmission data is scrambled by the first RNTI, and the DCI including the second information indication field for indicating the received data can be simultaneously transmitted. , can also be sent separately.

a second information indication field for indicating transmission data and a second information indication field for indicating reception data may be

The newly added information in the DCI indicates the bit value in the domain, or the bit value in the existing information indicating field in the DCI is assigned a new meaning.

For example, an information indication field is added to the DCI, and the information indicates whether the field indicates transmission or reception.

It is assumed that the information indicates that the field is 1 bit, the information indicating field 0 indicates transmission, and 0 indicates reception. If the network side device indicates the user equipment sent on the D2D, the information indicates that the domain is 1 (ie, used to indicate the transmission data. The second information indicating field) and scrambling the DCI including the information indicating domain by the fourth RNTI; if the network side device indicates the user equipment received on the D2D, the information indicating that the domain is 0 (ie, for indicating The second information receiving the data indicates the domain), and the DCI containing the information indicating domain is scrambled by the fourth RNTI. Preferably, if the group D2D communication is performed, the network device sends a first RNTI scrambling corresponding to the user equipment that transmits the data on the D2D Link to the user equipment that is transmitted in the D2D transmission in the group on the N2D Link. And including a DCI indicating a second information indication field of the transmission data; transmitting, to the user equipment in the group, a first RNTI scrambling corresponding to the group indicating the data transmission on the D2D Link, and including The second information of the received data indicates the DCI of the domain, so that the user equipment that sends data in the group sends data on the D2D Link, and other user equipments in the group receive data on the D2D Link.

Correspondingly, if group D2D communication is performed, the user equipment receives, on the N2D Link, a first RNTI scrambling corresponding to the user equipment for indicating data transmission on the D2D Link, and includes a second information indication for indicating transmission data. The DCI of the domain, and the first RNTI scrambling corresponding to the group indicating the data transmission on the D2D Link, and including the DCI for indicating the second information indicating domain of the received data, transmitting the data on the D2D Link That is, if the first RNTI scrambling is received and the DCI indicating the second information indicating field of the transmission data is included, the indication of the domain is indicated only according to the first RNTI and the second information indicating the transmission data. Process

If the group D2D communication is performed, the user equipment receives the DCI corresponding to the group indicating the data transmission on the D2D Link, and includes the DCI for indicating the second information indicating the received data. Receive data on the D2D Link.

In an implementation, the network side device sends a first RNTI scrambling corresponding to the user equipment, and includes a DCI indicating a second information indicating domain of the sending data, including:

The network side device performs the first RNTI scrambling corresponding to the PDCCH/EPDCCH dedicated search space and the PDCCH/EPDCCH-specific search space determined by the C-RNTI of the user equipment that needs to transmit data on the D2D Link, and includes The second information indicating the sending data indicates the DCI of the domain;

The network side device sends the first RNTI scrambling corresponding to the group, and includes a DCI for indicating the second information indication field of the received data, including:

The network side device is scrambled in the PDCCH/EPDCCH common search space and/or the first RNTI corresponding to the PDCCH/EPDCCH-specific search space transmission group determined according to the first RNTI corresponding to the group, and includes a second for indicating the received data. The information indicates the DCI of the domain.

Correspondingly, the user equipment receives the first RNTI scrambling, and includes a DCI indicating a second information indicating domain of the sending data, including:

The user equipment receives the first RNTI scrambling in the PDCCH/EPDCCH common search space and/or the PDCCH/EPDCCH-specific search space determined according to the C-RNTI of the user equipment, and includes a DCI indicating a second information indicating domain of the transmitted data;

The user equipment receives the first RNTI scrambling, and includes a DCI indicating a second information indicating domain of the received data, including:

The user equipment is determined in the PDCCH/EPDCCH common search space and/or according to the first RNTI corresponding to the group. The PDCCH/EPDCCH-specific search space receives the first RNTI scrambling and includes a DCI indicating a second information indicating domain of the received data.

For mode 3, if group D2D communication is not performed, the network side device needs to configure two RNTIs for the user equipment, that is, the C-RNTI indicates N2D transmission, and the D2D-RNTI is used to indicate that data is transmitted on the D2D.

If the group D2D communication is performed, the network side device needs to configure two RNTIs for the user equipment, that is, the C-RNTI indicates that the N2D transmission is performed, and the D2D-group RNTI is used to indicate that the user equipment in the group transmits data on the D2D.

It should be noted that the first RNTI, the second RNTI, the third RNTI, the group RNTI, and the like are only used to distinguish RNTIs of different meanings, that is, although they are all the first RNTIs, they can only represent all the first RNTIs. Used to indicate that data is transmitted on the D2D Link, but not all are the same RNTI.

The following takes the first RNTI as an example for description.

For example, the first RNTI sent by user equipment A and the first RNTI sent by user equipment B are different RNTIs. The first RNTI sent to the user equipment A is the first RNTI allocated to the user equipment A; the first RNTI sent to the user equipment B is the first RNTI allocated to the user equipment B. After receiving the DCI scrambled by the first RNTI corresponding to the user equipment A, the user equipment A knows that the DCI is its own; after receiving the DCI scrambled by the first RNTI corresponding to the user equipment A, the user equipment B knows the DCI. Not your own.

The first RNTI may also be allocated to a group of user equipments, and then the corresponding first RNTIs are respectively allocated to each user equipment in the group, so that the user equipment can determine whether the DCIs scrambled by different first RNTIs need to be received. After receiving the corresponding first RNTI, the processing is performed according to the indication of the first RNTI.

The following is a list of examples to illustrate the solution of the present invention.

Embodiment 1 : By means of adding information indicating fields in scheduling signaling, jointly distinguishing whether the current scheduling is N2D link or

The D2D link, and the scheduling signaling that distinguishes the current network side device, is whether the D2D link is sent or received.

As described above, the network side device indicates, by using the scheduling signaling on the N2D link, that the D2D user equipment A performs data reception or reception on the D2D link according to the specified transmission attribute on the designated resource, and distinguishes the current network side device from the D2D user equipment. Whether the scheduling signaling is for the scheduling of the N2D link or the scheduling of the D2D link, and whether the scheduling signaling of the current network side device is the transmission of the D2D link or the reception, this situation may be jointly indicated:

The information in the PDCCH/EPDCCH is fixed by 2 bits. The MSB is used to indicate the scheduling of the N2D link or the scheduling of the D2D link. For example, 0 indicates the scheduling of the N2D link, and 1 indicates the scheduling of the D2D link. The LSB is used to indicate whether the D2D link is sent or received. For example: 0 means reception and 1 means transmission. (The addition of 2 bits here does not cause the blurring phenomenon after the ambiguous bit padding does not know the current D2D link or N2D link only.) In this case, if the MSB value is 0, the LSB value of 0 or 1 is invalid. In this case, the LSB fixed value is 0 or 1, which is used for PDCCH/EPDCCH consistency detection, and reduces the PDCCH/EPDCCH false detection probability.

Embodiment 2: Jointly distinguishing whether a current N2D link is scheduled by configuring multiple RNTIs for one UE. The D2D link, and the scheduling signaling that distinguishes the current network side device, is whether the D2D link is sent or received.

Multiple RNTIs are configured for one UE, for example: C-RNTI is used for scheduling on the N2D link, D2D-TX-RNTI is used for scheduling D2D link transmission, and D2D-RX-RNTI is used for scheduling D2D link reception. If there is group communication, a D2D-group-RX-RNTI can be configured for the group communication user to schedule the group user to receive on the D2D link.

As described above, after receiving the scheduling/instruction signaling sent on the N2D link of the network side device, the D2D user equipment transmits/receives data according to the indication of the network side device after a predetermined time offset. After receiving the scheduling/instruction signaling sent by the N2D link, the user equipment needs to include two parts of processing time: the time for detecting the DCI, and the time for the user equipment to switch (about 20us). The predetermined time offset may be n+k, where n is a subframe in which the network side transmits scheduling/indication signaling on the N2D link, k is the number of offset subframes, and the D2D user equipment is in the n+k subframe. Send/receive D2D link.

In LTE and subsequent LTE-based systems,

If the N2D link is an FDD system, k can be fixed to 4.

If the N2D link is a TDD system, then k is associated with the TDD UL/DL subframe configuration, and the D2D link is associated with the UL/DL subframe transmission, if the uplink subframe is used, then between the UL grant and the PUSCH of the LTE TDD The timing relationships are the same (k values are determined according to the table defined in the existing 36.213).

Communication on the D2D link includes two scenarios:

One-to-one communication scenario (for example: D2D user equipment A transmission, D2D user equipment B reception), the network side schedules D2D user equipment A to transmit through the signaling indicated by the dedicated RNTI of the D2D user equipment A, and the network side equipment passes the D2D user. The signaling indicated by the dedicated RNTI of device B indicates that D2D user equipment B receives. For a one-to-many communication scenario, it can be transmitted independently by one-to-one communication.

A one-to-many communication scenario (for example, D2D user equipment A sends, D2D user equipment B, C, D receives), the network side device first groups the D2D user equipments A, B, C, and D into a group, and establishes a group-RNTI. The network side transmits the D2D user equipment A by using the signaling indicated by the dedicated RNTI of the D2D user equipment A, and the network side equipment indicates the D2D user equipment B, C by the group-RNTI of the D2D user equipments A, B, C, and D. D receiving, wherein, for the D2D user equipment A, the signaling that the scheduled D2D user equipment A indicated by the dedicated RNTI performs transmission covers the received signaling indicated by the group-RNTI. In the LTE and LTE subsequent systems, the signaling indicated by the group-RNTI may be transmitted through the common search space of the PDCCH/EPDCCH, or may also be defined in a new common search space for D2D scheduling.

As shown in FIG. 5, the network side device in the system for data transmission in the embodiment of the present invention includes: a configuration module 500 and an indication module 510.

The configuration module 500 is configured to configure, for the user equipment, an information indication domain in the RNTI and/or DCI for D2D communication; The indication module 510 is configured to indicate, according to the information indication field in the RNTI and/or the DCI, the user equipment that communicates in the D2D communication on the N2D Link to communicate on the D2D Link.

Preferably, the configuration module 500 is specifically configured to:

Configuring a first RNTI for the user equipment to indicate that the user equipment communicates on the D2D link; or configuring a second RNTI for the user equipment to indicate that the user equipment performs data transmission on the D2D link, and/or one The third RNTI indicating that the user equipment performs data reception on the D2D link.

Preferably, the configuration module 500 is specifically configured to:

A user equipment is configured with a group RNTI for indicating data reception in the D2D group communication; and/or a second RNTI for indicating that the user equipment performs data transmission on the D2D link.

Preferably, the information indication field in the DCI is used to indicate that the user equipment sends or receives data on the D2D link. Preferably, the configuration module 500 is specifically configured to:

The user equipment is configured with a first RNTI for indicating that the user equipment communicates on the D2D link; the information indication field in the DCI is used to indicate that the user equipment sends or receives data.

Preferably, the configuration module 500 is specifically configured to:

A user equipment is configured with a group RNTI for indicating data reception in D2D group communication; and/or an information indication field in the DCI is used to indicate that the user equipment transmits or receives data on the D2D link.

Preferably, the indication module 510 is specifically configured to:

Determining, according to the information indication field in the RNTI and/or the DCI, the user equipment that performs data transmission in the D2D communication on the N2D Link transmits data on the D2D Link; indicates the domain according to the information in the RNTI and/or the DCI, and indicates on the N2D Link The user equipment that performs data reception in D2D communication receives data on the D2D Link.

Preferably, the indication module 510 is specifically configured to:

In the PDCCH/EPDCCH-specific search space determined by the PDCCH/EPDCCH and/or the PDCCH/EPDCCH-specific search space determined by the user equipment C-RNTI, the DCI indicating that the user equipment performing data transmission in the D2D communication transmits the data on the D2D Link is transmitted.

Preferably, the indication module 510 is specifically configured to:

In the PDCCH/EPDCCH-specific search space determined by the PDCCH/EPDCCH and/or the PDCCH/EPDCCH-specific search space determined by the user equipment C-RNTI, the DCI indicating that the user equipment performing data reception in the D2D communication receives the data on the D2D Link is transmitted.

Preferably, the DCI scrambled RNTI is a C-RNTI or a first RNTI or a third RNTI.

Preferably, the indication module 510 is specifically configured to:

Transmitting the DCI received by the D2D link in the common search space of the PDCCH/EPDCCH; and/or transmitting the data indicating the D2D communication in the dedicated search space of the PDCCH/EPDCCH determined by the group RNTI of the user equipment The received user equipment receives the DCI of the data on the D2D Link.

Preferably, the DCI plus 4 RNTI is a group RNTI.

An embodiment of the present invention provides a network side device for data transmission, including a processor and a data transceiving interface, where: the processor is configured to: configure, in the RNTI and/or DCI for D2D communication, for the user equipment An information indication field; according to the information indication domain in the RNTI and/or the DCI, indicating, on the N2D Link, that the user equipment that performs communication in the D2D communication communicates on the D2D Link;

As shown in FIG. 6, the user equipment in the system for data transmission in the embodiment of the present invention includes: a determining module 600 and a processing module 610.

a determining module 600, configured to determine, by the network side device, the RNTI configured for the user equipment for D2D communication and/or

The information in the DCI indicates the domain;

The processing module 610 is configured to receive the DCI, and perform D2D link communication according to the RNTI of the received DCI and/or the information indication field in the received DCI.

Preferably, the processing module 610 is specifically configured to:

After receiving the DCI scrambled by the first RNTI for instructing the user equipment to communicate on the D2D link, proceeding

D2D link communication; after receiving the DCI scrambled by the second RNTI for indicating that the user equipment sends on the D2D link, transmitting on the D2D link; receiving the indication that the user equipment receives on the D2D link After the DCI scrambled by the third RNTI, the transmission is performed on the D2D link.

Preferably, the processing module 610 is specifically configured to:

Receiving a DCI for indicating a second RNTI scrambling of the user equipment to transmit on the D2D link and for indicating

After receiving the DCI scrambled by the received group RNTI in the D2D group communication, transmitting on the D2D link; receiving the DCI scrambled for indicating the group RNTI received in the D2D group communication, and receiving on the D2D link .

Preferably, the processing module 610 is specifically configured to:

After receiving the DCI including the information indication field, if the information indication field indicates that the user equipment sends on the D2D link, it transmits on the D2D link; if the information indication field indicates that the user equipment receives on the D2D link, on the D2D link Receive.

Preferably, the processing module 610 is specifically configured to:

After receiving the DCI with the information indicating field and being scrambled by the first RNTI for indicating that the user equipment communicates on the D2D link, if the information indicating field indicates that the user equipment sends, the sending is performed on the D2D link; After the DCI that contains the information indication field and is scrambled by the first RNTI for indicating that the user equipment communicates on the D2D link, if the information indication field indicates that the user equipment receives, the reception is performed on the D2D link.

Preferably, the processing module 610 is specifically configured to:

Receiving the first RNTI containing the information indication field and indicating that the user equipment is communicating on the D2D link The scrambled DCI, and the information indication field indicates the user equipment to send, and after receiving the DCI scrambled by the group RNTI for receiving the reception in the D2D group communication, transmitting on the D2D link; receiving the information indication a domain, and a DCI scrambled by the C-RNTI of the user equipment, and the information indication field indicates that the user equipment transmits on the D2D link, and after receiving the DCI scrambled by the group RNTI for indicating reception in the D2D group communication , transmitting on the D2D link; receiving the D2D link after receiving the DCI scrambled by the group RNTI for receiving the D2D group communication.

Preferably, the processing module 610 is specifically configured to:

Preferably, the DCI scrambled RNTI is a C-RNTI or a first RNTI or a second RNTI or a third RNTI. Preferably, the processing module 610 is specifically configured to:

Transmitting the DCI received by the D2D link in the common search space of the PDCCH/EPDCCH; and/or receiving in the dedicated search space of the PDCCH/EPDCCH determined by the group RNTI of the user equipment, indicating that the user equipment receiving the D2D communication receives on the D2D Link The DCI of the data.

Preferably, the DCI plus 4 RNTI is a group RNTI.

The data transceiver interface is configured to implement data transmission between the processor and the network side device and other user equipment. Based on the same inventive concept, the embodiment of the present invention further provides a method for the network side device to configure data transmission for the user equipment, and the network side device corresponding to the method is the network side device in the system for data transmission according to the embodiment of the present invention. The principle of the method for solving the problem is similar to that of the system. Therefore, the implementation of the method can be referred to the implementation of the system for data transmission, and the repeated description is not repeated.

As shown in FIG. 7, the method for configuring data transmission for a user equipment by a network side device according to an embodiment of the present invention includes the following steps: Step 701: A network side device configures, for a user equipment, a radio network temporary identifier RNTI and/or downlink for D2D communication. The information indicating domain in the control information DCI;

Step 702: The network side device indicates the domain according to the information in the RNTI and/or the DCI, and indicates, on the N2D Link, the user equipment that communicates in the D2D communication to communicate on the D2D Link.

There are many types of network side device configuration, which are described separately below.

Configuration 1: The network side device may configure a first RNTI for the user equipment to indicate that the user equipment communicates on the D2D link, and if the network side device needs to notify the user equipment to perform D2D communication, the first RNTI may be used to scramble the DCI. After being sent to the user equipment, the corresponding user equipment receives the DCI scrambled by the first RNTI, and then knows that it is in D2D. Or the network side device configures, for the user equipment, a second RNTI for indicating that the user equipment performs data transmission on the D2D link, and/or a third RNTI for indicating that the user equipment performs data reception on the D2D link. If the network side device needs to notify the user equipment to send data in the D2D, the second RNTI may be used to scramble the DCI and then sent to the user equipment. After receiving the DCI scrambled by the second RNTI, the corresponding user equipment knows to send the data on the D2D. Data, if it is necessary to indicate the reception of data, it can be scrambled with the third RNTI.

Configuration 3: The information indication field in the DCI is used to indicate that the user equipment sends or receives data on the D2D link. The bit value corresponding to the information indication field indicates different meanings, for example, 1 is sent on the D2D link, and 0 is received on the D2D link. If the network side device needs to notify the user equipment to send data in the D2D, the information indication field may be set as 1. After the corresponding user equipment receives the DCI information indicating field as 1, it knows that the data is sent on the D2D.

Configuration 4: The network side device configures a first RNTI for the user equipment to indicate that the user equipment communicates on the D2D link; the information indication field in the DCI is used to indicate that the user equipment sends or receives data. This configuration combines the RNTI and the information indication domain. That is, the information indication field is added to the DCI scrambled by the first RNTI, thereby achieving the purpose of combining the indication of the RNTI and the information indication field.

Configuration 5: The network side device configures, for the user equipment, a group RNTI for indicating data reception in the D2D group communication, so that the user equipment only receives broadcast or multicast information on the D2D link; and/or the information indication in the DCI The field is used to indicate that the user equipment sends or receives data on the D2D link.

The PDCCH/EPDCCH-specific search space that can be determined in the common search space of the PDCCH/EPDCCH and/or the C-RNTI of the user equipment when the user equipment that performs data transmission in the D2D communication transmits the data on the D2D Link on the N2D Link. The transmission indicates that the user equipment performing data transmission in the D2D communication transmits the DCI of the data on the D2D Link.

The DCI scrambled RNTI may be a C-RNTI or a first RNTI or a second RNTI.

The PDCCH/EPDCCH specific to the PDCCH/EPDCCH in the common search space of the PDCCH/EPDCCH and/or the PDCCH/EPDCCH determined by the user equipment C-RNTI, when the user equipment that performs data reception in the D2D communication on the N2D Link transmits data on the D2D Link. In the search space, the DCI that receives the data received by the user equipment that performs data reception in the D2D communication on the D2D Link is transmitted.

The DCI scrambled RNTI is a C-RNTI or a first RNTI or a third RNTI.

The network device indicates that the user equipment that performs data reception in the D2D communication on the N2D Link is in the D2D. When the data is transmitted on the Link, the DCI received by the D2D link is transmitted in the common search space of the PDCCH/EPDCCH; and/or in the dedicated search space of the PDCCH/EPDCCH determined by the group RNTI of the user equipment, the transmission indicates data reception in the D2D communication. The user equipment receives the DCI of the data on the D2D Link.

The RNTI of DCI plus 4 is a group RNTI.

Based on the same inventive concept, the embodiment of the present invention further provides a method for data transmission of a user equipment, where the user equipment corresponding to the method is a user equipment in a system for data transmission according to an embodiment of the present invention, and the method solves the problem. Similar to the system, therefore, the implementation of the method can be referred to the implementation of the system for data transmission, and the repetition will not be repeated.

As shown in FIG. 8, the method for data transmission of a user equipment according to an embodiment of the present invention includes the following steps:

Step 801: The user equipment determines, by the network device, the RNTI configured for the user equipment for D2D communication and/or

The information in the DCI indicates the domain;

Step 802: The user equipment receives the DCI, and performs D2D link communication according to the RNTI of the received DCI and/or the information indication field in the received DCI.

Preferably, the user equipment performs D2D link communication, including:

After receiving the second RNTI scrambled DCI for instructing the user equipment to perform data transmission on the D2D link and the DCI for indicating the group RNTI scrambling for data reception in the D2D group communication, the user equipment performs on the D2D link. Data transmission

Preferably, the user equipment performs D2D link communication, including:

After receiving the DCI including the information indication field, if the information indication field indicates that the user equipment sends data on the D2D link, the user equipment performs data transmission on the D2D link; if the information indication field indicates that the user equipment receives data on the D2D link, Data is then received on the D2D link.

Preferably, the user equipment performs D2D link communication, including:

After receiving the DCI scrambled by the first RNTI indicating that the user equipment communicates on the D2D link, the user equipment performs data on the D2D link if the information indication field indicates that the user equipment sends data. Send

After receiving the DCI that is included in the information indicating field and is used by the user equipment to indicate that the user equipment is communicating on the D2D link, if the information indicating field indicates that the user equipment receives the data, the user equipment performs the D2D link. Data reception.

Preferably, the user equipment performs D2D link communication, including:

The user equipment receives the DCI that includes the information indication field and is scrambled by the first RNTI for indicating that the user equipment communicates on the D2D link, and the information indication field indicates that the user equipment sends data, and the received information is used to indicate D2D. After the DCI scrambled by the group RNTI for data reception in the group communication, data reception is performed on the D2D link;

The user equipment receives the DCI including the information indication field and is scrambled by the C-RNTI of the user equipment, and the information indication field indicates that the user equipment sends data on the D2D link, and the reception is performed by the D2D group communication. After the data received by the group RNTI scrambled DCI, data transmission is performed on the D2D link;

Preferably, the user equipment receives the DCI, including:

The user equipment is determined in the common search space of the PDCCH/EPDCCH and/or the user equipment C-RNTI

The DCI is received in the PDCCH/EPDCCH exclusive search space.

Preferably, the DCI scrambled RNTI is a C-RNTI or a first RNTI or a second RNTI or a third RNTI.

Preferably, the user equipment receives the DCI, including:

Transmitting, by the user equipment, the DCI received by the D2D link in a common search space of the PDCCH/EPDCCH; and/or receiving, in the dedicated search space of the PDCCH/EPDCCH determined by the group RNTI of the user equipment, the user equipment indicating data reception in the D2D communication at the D2D The DCI of the data received on the Link.

Preferably, the DCI plus 4 RNTI is a group RNTI.

Those skilled in the art will appreciate that embodiments of the present invention can be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment, or a combination of software and hardware. Moreover, the present invention can be embodied in the form of a computer program product embodied on one or more computer-usable storage interfaces (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer usable program code.

The present invention has been described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (system), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flowchart illustrations and/or FIG. These computer program instructions can be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing device to produce a machine for the execution of instructions for execution by a processor of a computer or other programmable data processing device. To implement the functions specified in one or more blocks of a flow or a flow and/or block diagram of a flowchart Device.

The computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device. The apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.

These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device. The instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.

Although the preferred embodiment of the invention has been described, it will be apparent to those of ordinary skill in the art that <RTIgt; Therefore, the appended claims are intended to be construed as including the preferred embodiments and the modifications

It is apparent that those skilled in the art can make various modifications and variations to the invention without departing from the spirit and scope of the invention. Thus, it is intended that the present invention cover the modifications and modifications of the invention

Claims

Rights request

1. A data transmission method, characterized in that the method includes:

The network side device configures the wireless network temporary identifier RNTI and/or the downlink control information information indication field in the DCI for the user equipment;

According to the information indication domain in the RNTI and/or DCI, the network side device instructs the user equipment communicating in the D2D communication on the N2D Link, the direct link between the network and the user equipment, on the D2D Link, the direct link between the user equipment. communication.

2. The method of claim 1, wherein the network side device configures a first RNTI for the user equipment to instruct the user equipment to communicate on the D2D link;

Alternatively, the network side device configures for the user equipment a second RNTI used to instruct the user equipment to perform data transmission on the D2D link, and/or a third RNTI used to instruct the user equipment to perform data reception on the D2D link. RNTL

3. The method according to claim 1, characterized in that, the network side device configures a group RNTI for indicating data reception in D2D group communication for the user equipment; and/or a group RNTI used for indicating the user The second RNTI for the device to send data on the D2D link.

4. The method of claim 1, wherein the information indication field in the DCI is used to instruct the user equipment to send or receive data on the D2D link.

5. The method according to claim 1, characterized in that: the network side device configures a first RNTI for the user equipment to instruct the user equipment to communicate on the D2D link; the information in the DCI The instruction field is used to instruct the user equipment to send or receive data.

6. The method according to claim 1, characterized in that: the network side configures a group RNTI for indicating data reception in D2D group communication for the user equipment; and/or a group RNTI in the DCI The information indication field is used to instruct the user equipment to send or receive data on the D2D link.

7. The method according to any one of claims 1 to 6, characterized in that the network side device indicates the user communicating in the D2D communication on the N2D Link according to the information indication field in the RNTI and/or DCI. Devices in D2D

Communicate on Link, including:

The network side device instructs the user equipment that performs data transmission in D2D communication on the N2D Link to send data on the D2D Link according to the information indication field in the RNTI and/or DCI; According to the information indication field in the RNTI and/or DCI The information indication field instructs the user equipment that receives data in D2D communication on the N2D Link to receive data on the D2D Link.

8. The method of claim 7, wherein the network side device indicates D2D on the N2D Link User equipment that sends data during communication sends data on the D2D Link, including:

The network side device transmits instructions in the common search space of PDCCH/EPDCCH and/or the PDCCH/EPDCCH exclusive search space determined by the C-RNTI of the user equipment to instruct the user equipment that sends data in D2D communication to send data on the D2D Link. DCI.

9. The method as claimed in claim 8, characterized in that the DCI scrambled RNTI is C-RNTI or the first RNTI or the second RNTI.

10. The method of claim 7, wherein the network side device instructs the user equipment that receives data in D2D communication on the N2D Link to receive data on the D2D Link, including:

The network side device transmits instructions in the common search space of PDCCH/EPDCCH and/or the PDCCH/EPDCCH exclusive search space determined by the user equipment C-RNTI to indicate that the user equipment receiving data in D2D communication receives data on the D2D Link. DCI.

11. The method as claimed in claim 10, characterized in that the DCI scrambled RNTI is C-RNTI or the first RNTI or the third RNTI.

12. The method of claim 7, wherein the network side device instructs the user equipment that receives data in D2D communication on the N2D Link to receive data on the D2D Link, including:

The network side device transmits the DCI received by the D2D link in the common search space of PDCCH/EPDCCH; and/or in the exclusive search space of PDCCH/EPDCCH determined by the group RNTI of the user equipment, transmits data indicating that D2D communication is performed The receiving user device receives the DCI of the data on the D2D Link.

13. The method as claimed in claim 12, characterized in that the DCI scrambled RNTI is a group RNTI.

14. A data transmission method, characterized in that the method includes:

The user equipment determines the information indication domain in the RNTI and/or DCI configured for D2D communication by the network side equipment for the user equipment;

The user equipment receives the DCI and performs D2D link communication according to the RNTI of the scrambled DCI and/or the information indication field in the received DCI.

15. The method of claim 14, wherein the user equipment performs D2D link communication, including:

The user equipment receives the scrambled first RNTI used to instruct the user equipment to communicate on the D2D link.

After DCI, perform D2D link communication;

After receiving the second RNTI scrambled DCI used to instruct the user equipment to send data on the D2D link, the user equipment sends data on the D2D link;

After receiving the third RNTI scrambled DCI used to instruct the user equipment to receive data on the D2D link, the user equipment receives data on the D2D link.

16. The method of claim 14, wherein the user equipment performs D2D link communication, including Includes:

After the user equipment receives the DCI scrambled by the second RNTI used to instruct the user equipment to perform data transmission on the D2D link and the DCI scrambled by the group RNTI used to instruct the user equipment to perform data reception in the D2D group communication, the user equipment performs the D2D link Send data on

After receiving the DCI scrambled by the group RNTI used to indicate data reception in D2D group communication, the user equipment performs data reception on the D2D link.

17. The method of claim 14, wherein the user equipment performs D2D link communication, including:

After receiving the DCI containing the information indication field, the user equipment sends data on the D2D link if the information indication field indicates that the user equipment sends data on the D2D link; if the information indication field indicates that the user equipment sends data on the D2D link; If data is received on the D2D link, the data will be received on the D2D link.

18. The method as claimed in claim 14, characterized in that the user equipment performs D2D link communication, including:

After the user equipment receives the DCI containing the information indication field and scrambled by the first RNTI used to instruct the user equipment to communicate on the D2D link, if the information indication field instructs the user equipment to send data, then in the D2D Send data on link;

After the user equipment receives the DCI containing the information indication field and scrambled by the first RNTI used to instruct the user equipment to communicate on the D2D link, if the information indication field instructs the user equipment to receive data, then in the D2D Receive data on the link.

19. The method as claimed in claim 14, characterized in that the user equipment performs D2D link communication, including:

The user equipment receives DCI that includes an information indication field and is scrambled by the first RNTI used to instruct the user equipment to communicate on the D2D link, and the information indication field instructs the user equipment to send data, and receives After receiving the DCI scrambled by the group RNTI used to indicate reception in D2D group communication, data is sent on the D2D link; The user equipment receives the information indication field, and is determined by the C- of the user equipment. RNTI scrambled DCI, and the information indication field instructs the user equipment to send data on the D2D link, and after receiving the DCI scrambled by the group RNTI used to indicate data reception in D2D group communication, on the D2D link Send data;

After receiving the DCI scrambled by the group RNTI used to indicate data reception in D2D group communication, the user equipment receives data on the D2D link.

20. The method according to any one of claims 14 to 19, wherein the user equipment receiving DCI includes: the user equipment determines the C-RNTI in the common search space of PDCCH/EPDCCH and/or the user equipment of

Receive DCI in PDCCH/EPDCCH dedicated search space.

21. The method of claim 20, wherein the DCI scrambled RNTI is C-RNTI Or the first RNTI or the second RNTI or the third RNTI.

22. The method according to any one of claims 14 to 19, wherein the user equipment receiving DCI includes: the user equipment transmits the DCI received by the D2D link in the common search space of PDCCH/EPDCCH; and/or In the dedicated search space of the PDCCH/EPDCCH determined by the group RNTI of the user equipment, a DCI indicating that the user equipment performing data reception in D2D communication receives data on the D2D Link is received.

23. The method of claim 22, wherein the DCI scrambled RNTI is a group RNTI.

24. A network-side device for data transmission, characterized in that the network-side device includes:

a configuration module, configured for user equipment to configure the information indication domain in the RNTI and/or DCI used for D2D communication; the indication module, used to indicate D2D on the N2D Link according to the information indication domain in the RNTI and/or DCI User devices communicating in the communication communicate on the D2D Link.

25. The network side device according to claim 24, wherein the configuration module is specifically configured to: configure a first RNTI for the user equipment that is used to instruct the user equipment to communicate on the D2D link; or, The user equipment is configured with a second RNTI used to instruct the user equipment to perform data transmission on the D2D link, and/or a third RNTI used to instruct the user equipment to perform data reception on the D2D link.

26. The network side device according to claim 24, wherein the configuration module is specifically configured to: configure a group RNTI for indicating data reception in D2D group communication for the user equipment; and/or A second RNTI used to instruct the user equipment to send data on the D2D link.

27. The network side device according to claim 24, wherein the information indication field in the DCI is used to instruct the user equipment to send or receive data on the D2D link.

28. The network side device according to claim 24, wherein the configuration module is specifically configured to: configure a first RNTI for the user equipment that is used to instruct the user equipment to communicate on the D2D link; The information indication field in the DCI is used to instruct the user equipment to send or receive data.

29. The network side device according to claim 24, wherein the configuration module is specifically configured to: configure a group RNTI for indicating data reception in D2D group communication for the user equipment; and/ Or the information indication field in the DCI is used to instruct the user equipment to send or receive data on the D2D link.

30. The network side device according to any one of claims 24 to 29, characterized in that the indication module is specifically used to: indicate D2D communication on the N2D Link according to the information indication field in the RNTI and/or DCI. The user equipment that performs data transmission in D2D communication sends data on the D2D Link; and according to the information indication field in the RNTI and/or DCI, instructs the user equipment that performs data reception in D2D communication on the N2D Link to receive data on the D2D Link.

31. The network side device according to claim 30, characterized in that the indication module is specifically used for: PDCCH/EPDCCH exclusive search determined in the common search space of PDCCH/EPDCCH and/or the user equipment C-RNTI. In the space, the DCI that instructs the user equipment to send data in D2D communication to send data on the D2D Link is transmitted.

32. The network side device as claimed in claim 31, characterized in that the DCI scrambled RNTI is C-RNTI or the first RNTI or the second RNTI.

33. The network side device according to claim 30, characterized in that the indication module is specifically used for: PDCCH/EPDCCH exclusive search determined in the common search space of PDCCH/EPDCCH and/or the user equipment C-RNTI. In the space, the DCI that instructs the user equipment receiving data in D2D communication to receive data on the D2D Link is transmitted.

34. The network side device as claimed in claim 33, characterized in that the DCI scrambled RNTI is C-RNTI or the first RNTI or the third RNTI.

35. The network side device according to claim 30, wherein the indication module is specifically configured to: transmit the DCI received by the D2D link in the common search space of the PDCCH/EPDCCH; and/or transmit the DCI received by the D2D link in the common search space of the user equipment; In the exclusive search space of the PDCCH/EPDCCH determined by the group RNTI, the DCI indicating that the user equipment receiving data in D2D communication receives data on the D2D Link is transmitted.

36. The network side device as claimed in claim 35, characterized in that the DCI scrambled RNTI is a group RNTL

37. A user equipment for data transmission, characterized in that the user equipment includes:

Determining module, configured to determine the information indication domain in the RNTI and/or DCI configured by the network side device for the user equipment for D2D communication;

The processing module is configured to receive DCI and perform D2D link communication according to the RNTI of the scrambled DCI and/or the information indication field in the received DCI.

38. The user equipment according to claim 37, wherein the processing module is specifically configured to: after receiving the first RNTI scrambled DCI used to instruct the user equipment to communicate on the D2D link, perform D2D link communication; after receiving the second RNTI scrambled DCI used to instruct the user equipment to send data on the D2D link, send data on the D2D link; after receiving the DCI used to instruct the user equipment to send data on the D2D link After receiving the scrambled DCI of the third RNTI, data reception is performed on the D2D link.

39. The user equipment according to claim 37, characterized in that the processing module is specifically configured to: receive the second RNTI scrambled DCI used to instruct the user equipment to transmit data on the D2D link and the DCI used to instruct the user equipment to send data on the D2D link. After receiving the DCI scrambled by the group RNTI for data reception in D2D group communication, data is sent on the D2D link; after receiving the DCI scrambled by the group RNTI used to indicate data reception in D2D group communication, the data is sent on the D2D link to receive data.

40. The user equipment according to claim 37, wherein the processing module is specifically configured to: after receiving the DCI containing the information indication field, if the information indication field instructs the user equipment to send data on the D2D link , then data is sent on the D2D link; if the information indication field indicates that the user equipment receives data on the D2D link, then data is received on the D2D link.

41. The user equipment as claimed in claim 37, wherein the processing module is specifically configured to: upon receiving the first RNTI containing the information indication field and used to instruct the user equipment to communicate on the D2D link After scrambling the DCI, if the information indication field instructs the user equipment to send data, the data is sent on the D2D link; after receiving the information indication field and the user equipment is used to communicate on the D2D link. After an RNTI scrambled DCI, if the information indication field indicates that the user equipment receives data, the data is received on the D2D link.

42. The user equipment as claimed in claim 37, wherein the processing module is specifically configured to: upon receiving the first RNTI containing the information indication field and used to instruct the user equipment to communicate on the D2D link Scrambled DCI, and the information indication field instructs the user equipment to send data, and after receiving the DCI scrambled by the group RNTI used to indicate data reception in D2D group communication, perform data on the D2D link Send; After receiving the DCI containing the information indication field and scrambled by the C-RNTI of the user equipment, and the information indication field instructs the user equipment to send data on the D2D link, and receiving the DCI used to indicate the D2D group After receiving the DCI scrambled by the group RNTI for data reception in group communication, data is sent on the D2D link; after receiving the DCI scrambled by the group RNTI used to indicate data reception in D2D group communication, the data is sent on the D2D link to receive data.

43. The user equipment according to any one of claims 37 to 42, characterized in that the processing module is specifically used to: determine in the common search space of PDCCH/EPDCCH and/or the user equipment C-RNTI

Receive DCI in PDCCH/EPDCCH dedicated search space.

44. The user equipment as claimed in claim 43, wherein the DCI scrambled RNTI is a C-RNTI or a first RNTI or a second RNTI or a third RNTI.

45. The user equipment according to any one of claims 37 to 42, characterized in that the processing module is specifically configured to: transmit the DCI received by the D2D link in the common search space of PDCCH/EPDCCH; and/or in the In the dedicated search space of the PDCCH/EPDCCH determined by the group RNTI of the user equipment, receive the DCI indicating that the user equipment performing data reception in D2D communication receives data on the D2D Link.

46. User equipment as claimed in claim 45, characterized in that the DCI scrambled RNTI is a group RNTI.

47. A data transmission system, characterized in that the system includes:

The network side device is configured to configure the information indication domain in the RNTI and/or DCI for D2D communication for the user equipment; according to the information indication domain in the RNTI and/or DCI, instruct the N2D Link to communicate in the D2D communication User equipment communicates on D2D Link;

The user equipment is configured to receive DCI, and perform D2D link communication according to the RNTI that scrambles the received DCI and/or the information indication field in the received DCI.