CN105379406B - Signal transmission method and device in device-to-device D2D communication - Google Patents

Abstract

The present invention relates to the field of mobile communication technologies, and in particular, to a signal transmission method and apparatus in D2D communication, so as to solve a problem that a DRX mechanism is applied to D2D communication, which may cause a failure in signal transmission. The signal transmission method in D2D communication in the invention comprises the following steps: the method comprises the steps that first User Equipment (UE) acquires discontinuous reception cycle (DRX) configuration information of second UE; the first UE determines the time of the second UE in an active state according to the DRX configuration information of the second UE; and the first UE sends signals to the second UE based on the D2D communication mode within the time when the second UE is in the activated state. The signal is ensured to be transmitted within the time when the second UE is in the activated state, so that the probability of successful signal transmission is improved.

Description

Signal transmission method and device in device-to-device D2D communication

technical field

The present invention relates to the technical field of mobile communication, in particular to a signal transmission method and device in D2D communication.

Background technique

Device-to-Device (D2D) communication based on the Long Term Evolution (LTE) system is a kind of communication under the control of the cellular communication system that allows terminals to communicate directly by reusing cell resources. The communication between terminals can no longer be transferred through the base station. D2D communication can increase the spectral efficiency of the cellular communication system and reduce the transmit power of terminals, and is especially suitable for short-distance communication between terminals. In D2D communication, user equipment (User Equipment, UE) has an application ID (Application ID) and a group ID (Group ID), where different applications (such as voice calls, public safety announcements, etc.) correspond to different Application IDs, and different UE sets (each UE set includes multiple UEs) correspond to different Group IDs.

In LTE, the user equipment (User Equipment, UE) discontinuous reception (Discontinuous Reception, DRX) function control entity is located in the media access control (Media Access Control, MAC) layer of the protocol stack; its main function is to control the transmission of Instructions to notify the physical layer to monitor the physical downlink control channel (Physical Downlink Control Channel, PDCCH) at a specific time, and the receiving antenna will not be turned on for the rest of the time, and it is in a sleep state; the specific time here is the time when the UE is in the active state; the UE is in the active state. The time in the sleep state is the time when the UE is in the inactive state. Through this DRX mechanism, the configuration of system resources can be optimized and the power consumption of the UE can be saved.

When the DRX mechanism is applied to D2D communication, it may cause that among the two parties that need to communicate, the time when the signal sender sends the signal is the time when the other party is in the inactive state; in this case, the other party will not be able to receive The signal sent by the signal sending method, causing the signal sending to fail.

Contents of the invention

Embodiments of the present invention provide a signal transmission method and device to solve the problem that signal transmission may fail when the DRX mechanism is applied to D2D communication.

In a first aspect, a signal transmission device in device-to-device D2D communication is provided, and the device includes:

An obtaining module, configured to obtain the continuous reception cycle DRX configuration information of the second UE for the first user equipment UE;

A determining module, configured to determine the time when the second UE is in an active state according to the DRX configuration information of the second UE acquired by the acquiring module;

A sending module, configured to send a signal to the second UE based on a D2D communication manner within the time period when the second UE is in an active state determined by the determining module.

With reference to the first aspect, in a first possible implementation manner, the acquiring module is specifically configured to:

Sending a request message to the base station serving the first UE, and receiving discontinuous reception cycle DRX configuration information of the second UE sent by the base station, where the DRX configuration information of the second UE is determined according to the request message.

With reference to the first aspect, in a second possible implementation manner, the acquisition module is specifically configured to:

Receive the corresponding relationship between the discontinuous reception cycle DRX configuration information issued by the base station serving the first UE and the UE's application identifier Application ID or group identifier Group ID; according to the corresponding relationship and the second UE's Application ID or Group ID, determining DRX configuration information of the second UE;

With reference to the first aspect, or the first or second possible implementation manner of the first aspect, in a third possible implementation manner, the sending module is specifically configured to:

Based on the D2D communication manner, sending a discovery signal for enabling the second UE to detect the first UE to the second UE, or sending communication information to the second UE.

With reference to the first aspect, or any one of the first to third possible implementations of the first aspect, in a fourth possible implementation, the determining module is specifically configured to:

The time during which the second UE is in the active state is determined according to the DRX cycle, the DRX start offset, and the duration of the active state in each DRX cycle included in the DRX configuration information of the second UE.

In a second aspect, a signal transmission device in device-to-device D2D communication is provided, including:

A receiving module, configured to receive a request message for acquiring discontinuous reception cycle DRX configuration information of the second UE sent by the serving first user equipment UE;

a sending module, configured to send the DRX configuration information of the second UE to the first UE according to the request message received by the receiving module, and the DRX configuration information is used by the first UE to determine the second the time when the UE is in the active state, and send a signal to the second UE according to the determined time when the second UE is in the active state.

With reference to the second aspect, in a first possible implementation manner, the sending module is further configured to, before sending the DRX configuration information of the second UE to the first UE, send The base station sends a request message for obtaining the DRX configuration information of the second UE;

The receiving module is further configured to receive DRX configuration information of the second UE sent by the base station serving the second UE.

In a third aspect, a signal transmission device in device-to-device D2D communication is provided, and the device includes:

A determining module, configured to determine the correspondence between the discontinuous reception cycle DRX configuration information and the application identifier ApplicationID or the group identifier Group ID of the UE;

A sending module, configured to send the corresponding relationship determined by the determining module to the first UE served by the base station; the corresponding relationship is used for the first UE to determine the DRX configuration information of the second UE, and the DRX configuration The information is used for the first UE to determine the time when the second UE is in the active state, and send a signal to the second UE according to the determined time when the second UE is in the active state.

With reference to the third aspect, in a first possible implementation manner, the determining module is specifically configured to:

Configuring the correspondence between the DRX configuration information and the Application ID or Group ID of each UE served by the base station, and

Obtain the correspondence between the DRX configuration information configured by other base stations and the Application ID or Group ID of each UE served by the other base stations.

With reference to the third aspect, or the first possible implementation manner of the third aspect, in a second possible implementation manner, the device further includes:

The receiving module is configured to receive request information for obtaining the corresponding relationship sent by the first UE before the sending module sends the corresponding relationship to the serving first UE.

In a fourth aspect, a signal transmission device in device-to-device D2D communication is provided, including:

a receiver, configured to acquire the continuous reception cycle DRX configuration information of the second UE for the first UE;

a processor, configured to determine the time when the second UE is in an active state according to the DRX configuration information of the second UE acquired by the receiver;

A transmitter, configured to send a signal to the second UE based on a D2D communication manner during the time determined by the processor that the second UE is in an active state.

With reference to the fourth aspect, in a first possible implementation manner, the transmitter is further configured to send a request message to a base station serving the first UE;

The receiver is specifically configured to: receive discontinuous reception cycle DRX configuration information of the second UE sent by the base station, where the DRX configuration information of the second UE is determined according to the request message sent by the transmitter.

With reference to the fourth aspect, in a second possible implementation manner, the receiver is specifically configured to: receive the discontinuous reception cycle DRX configuration information issued by the base station serving the first UE and the UE's Application ID or group ID. Identifying the corresponding relationship of the Group ID; determining the DRX configuration information of the second UE according to the corresponding relationship and the Application ID or Group ID of the second UE;

With reference to the fourth aspect, or the first or second possible implementation manner of the fourth aspect, in a third possible implementation manner, the transmitter is specifically configured to:

Based on the D2D communication manner, sending a discovery signal for enabling the second UE to detect the first UE to the second UE, or sending communication information to the second UE.

With reference to the fourth aspect, or any one of the first to third possible implementation manners of the fourth aspect, in the fourth possible implementation manner, the processor is specifically configured to:

The time during which the second UE is in the active state is determined according to the DRX cycle, the DRX start offset, and the duration of the active state in each DRX cycle included in the DRX configuration information of the second UE.

In a fifth aspect, a signal transmission device in device-to-device D2D communication is provided, and the device includes:

The receiver is configured to receive a request message sent by the serving first UE for obtaining the discontinuous reception cycle DRX configuration information of the second UE;

a transmitter, configured to send the DRX configuration information of the second UE to the first UE according to the request message received by the receiver, where the DRX configuration information is used by the first UE to determine the second the time when the UE is in the active state, and send a signal to the second UE according to the determined time when the second UE is in the active state.

With reference to the fifth aspect, in a first possible implementation manner, the transmitter is further configured to, before sending the DRX configuration information of the second UE to the first UE, send The base station sends a request message for obtaining the DRX configuration information of the second UE;

The receiver is further configured to receive DRX configuration information of the second UE sent by the base station serving the second UE.

In a sixth aspect, a signal transmission device in device-to-device D2D communication is provided, including:

A processor, configured to determine the correspondence between the discontinuous reception cycle DRX configuration information and the application identifier ApplicationID or the group identifier Group ID of the UE;

A transmitter, configured to send the correspondence determined by the processor to the first UE served by the base station; the correspondence is used for the first UE to determine DRX configuration information of the second UE, and the DRX configuration The information is used for the first UE to determine the time when the second UE is in the active state, and send a signal to the second UE according to the determined time when the second UE is in the active state.

With reference to the sixth aspect, in a first possible implementation manner, the processor is specifically configured to:

Configuring the correspondence between the DRX configuration information and the Application ID or Group ID of each UE served by the base station, and

Obtain the correspondence between the DRX configuration information configured by other base stations and the Application ID or Group ID of each UE served by the other base stations.

With reference to the sixth aspect, or the first possible implementation manner of the sixth aspect, in a second possible implementation manner, the device further includes:

The receiver is configured to receive request information for acquiring the corresponding relationship sent by the first UE before the transmitter sends the corresponding relationship to the serving first UE.

In a seventh aspect, a signal transmission method in device-to-device D2D communication is provided, including:

The first user equipment UE obtains the discontinuous reception cycle DRX configuration information of the second UE;

The first UE determines the time when the second UE is in an active state according to the DRX configuration information of the second UE;

The first UE sends a signal to the second UE based on a D2D communication manner during the time when the second UE is in an active state.

With reference to the seventh aspect, in a first possible implementation manner, the first UE obtains the DRX configuration information of the second UE, including:

The first user equipment UE sends a request message to the base station serving the first UE;

The first UE receives the DRX configuration information of the second UE sent by the base station, and the DRX configuration information of the second UE is determined according to the request message.

With reference to the seventh aspect, in a second possible implementation, the first UE obtains the DRX configuration information of the second UE, including:

The first UE receives the correspondence between the discontinuous reception cycle DRX configuration information issued by the base station serving the first UE and the UE's application identifier Application ID or group identifier Group ID;

The first UE determines the DRX configuration information of the second UE according to the correspondence and the Application ID or Group ID of the second UE.

With reference to the seventh aspect, or the first or second possible implementation manner of the seventh aspect, in a third possible implementation manner, the first UE sends a signal to the second UE based on a D2D communication manner, including: :

The first UE sends to the second UE a discovery signal for enabling the second UE to detect the first UE based on a D2D communication manner, or sends communication information to the second UE.

With reference to the seventh aspect, or any possible implementation manner in the first to third possible implementation manners of the seventh aspect, in a fourth possible implementation manner, the first UE according to the second The DRX configuration information of the UE, which determines the time when the second UE is in the active state, includes:

The first UE determines the time when the second UE is in the active state according to the DRX cycle, the DRX start offset and the duration of the active state in each DRX cycle included in the DRX configuration information of the second UE.

In an eighth aspect, a signal transmission method in device-to-device D2D communication is provided, including:

The base station receives a request message for acquiring discontinuous reception cycle DRX configuration information of the second UE sent by the first UE served by the base station;

The base station sends the DRX configuration information of the second UE to the first UE, the DRX configuration information is used by the first UE to determine the time when the second UE is in the active state, and according to the determined Sending a signal to the second UE when the second UE is in the active state.

With reference to the eighth aspect, in a first possible implementation manner, before the base station sends the DRX configuration information of the second UE to the first UE, the base station further includes:

After determining that the base station serving the second UE is a different base station, the base station sends a request message for acquiring DRX configuration information of the second UE to the base station serving the second UE, and receives a request message serving the second UE. DRX configuration information of the second UE sent by the base station of the UE.

In a ninth aspect, a signal transmission method in device-to-device D2D communication is provided, including:

The base station determines the correspondence between the discontinuous reception cycle DRX configuration information and the UE's application identifier Application ID or group identifier Group ID;

The base station sends the determined corresponding relationship to the serving first UE; the corresponding relationship is used by the first UE to determine the DRX configuration information of the second UE, and the DRX configuration information is used by the first UE The UE determines the time when the second UE is in the active state, and sends a signal to the second UE according to the determined time when the second UE is in the active state.

With reference to the ninth aspect, in a first possible implementation manner, the base station determines the correspondence between the DRX configuration information and the UE's Application ID or Group ID, including:

The base station configures the correspondence between the DRX configuration information and the Application ID or Group ID of each UE served by the base station, and

Obtain the correspondence between the DRX configuration information configured by other base stations and the Application ID or Group ID of each UE served by the other base stations.

With reference to the ninth aspect, or the first possible implementation of the ninth aspect, in the second possible implementation, before the base station sends the determined correspondence to the serving first UE, the base station further includes: :

The base station receives request information for acquiring the correspondence sent by the first UE.

Using the method or device provided in any of the above aspects, when the DRX mechanism is applied to D2D communication, the first UE can obtain the DRX configuration information of the second UE that needs to communicate with it, and determine the first UE according to the DRX configuration information of the second UE. The time when the second UE is in the active state, and then the time for sending a signal to the second UE is determined according to the time when the second UE is in the active state. Since the signal is guaranteed to be sent within the time period when the second UE is in the active state, the probability of successful signal sending is improved.

Description of drawings

Figure 1a is a schematic diagram of the system structure when the base station serving the first UE and the base station serving the second UE are the same base station;

Fig. 1b is a schematic structural diagram of the system when the base station serving the first UE and the base station serving the second UE are different base stations.

FIG. 2 is a schematic diagram of a first UE sending a signal to a second UE during a time when the second UE is in an inactive state;

FIG. 3 is a flowchart of a signal transmission method in D2D communication provided by Embodiment 1 of the present invention;

FIG. 4 is a schematic diagram of a first UE sending a signal in a set of times when multiple second UEs are in an active state;

FIG. 5 is a schematic diagram of a first UE sending a signal within a minimum duration period including the time when multiple second UEs are in an active state;

FIG. 6 is a flowchart of a signal transmission method in D2D communication provided by Embodiment 2 of the present invention;

FIG. 7 is a flowchart of a signal transmission method in D2D communication provided by Embodiment 3 of the present invention;

FIG. 8 is a flowchart of a signal transmission method in D2D communication provided by Embodiment 4 of the present invention;

FIG. 9 is a flowchart of a signal transmission method in D2D communication provided by Embodiment 5 of the present invention;

FIG. 10 is a flowchart of a signal transmission method in D2D communication provided by Embodiment 6 of the present invention;

FIG. 11 is a flowchart of a signal transmission method in D2D communication provided by Embodiment 7 of the present invention;

FIG. 12 is a schematic structural diagram of a signal transmission device in D2D communication provided by Embodiment 8 of the present invention;

FIG. 13 is a schematic structural diagram of a signal transmission device in D2D communication provided by Embodiment 9 of the present invention;

FIG. 14 is a schematic structural diagram of a signal transmission device in D2D communication provided by Embodiment 10 of the present invention;

FIG. 15 is a schematic structural diagram of a signal transmission device in D2D communication provided by Embodiment 11 of the present invention;

FIG. 16 is a schematic structural diagram of a signal transmission device in D2D communication provided by Embodiment 12 of the present invention;

FIG. 17 is a schematic structural diagram of a signal transmission device in D2D communication provided by Embodiment 13 of the present invention.

Detailed ways

The signal transmission system in D2D communication provided by the embodiment of the present invention includes a first UE and a second UE performing D2D communication, a base station serving the first UE, and a base station serving the second UE. Here, the base station serving the first UE and the base station serving The base station of the second UE may be the same base station or different base stations. As shown in Figure 1a, it is a schematic diagram of the system structure when the base station serving the first UE and the base station serving the second UE are the same base station, as shown in Figure 1b, it is the base station serving the first UE and the base station serving the second UE A schematic diagram of the system structure when the base stations are different base stations.

If the DRX mechanism is applied to D2D communication, when the first UE sends a signal to the second UE, the second UE can only receive the signal sent by the first UE when it is in the active state. As shown in Figure 2, the first UE does not Send a signal to the second UE during the time when the second UE is in the active state, but send a signal to the second UE during the time when the second UE is in the inactive state, so that the second UE cannot receive the signal sent by the first UE Signal.

In the embodiment of the present invention, when the DRX mechanism is applied to D2D communication, the first UE can obtain the DRX configuration information of the second UE that needs to communicate with it, and determine that the second UE is in the active state according to the DRX configuration information of the second UE time, and then determine the time to send a signal to the second UE according to the time when the second UE is in the active state, thereby increasing the probability of successful signal transmission; there are many ways for the first UE to obtain the DRX configuration information of the second UE. The invention gives two examples. One example is to obtain the DRX configuration information of the second UE by requesting the base station, and the other is to obtain the DRX configuration information based on the UE's Application ID or Group ID issued by the base station. The DRX configuration information of the UE with the set Application ID or Group ID is determined according to the corresponding relationship of the information. The method for signal transmission in the embodiment of the present invention will be further described in detail below in conjunction with the accompanying drawings.

As shown in FIG. 3 , it is a flowchart of a signal transmission method in D2D communication provided by Embodiment 1 of the present invention. In this embodiment, the first UE acquires the DRX configuration information of the second UE by requesting the base station, including the following content.

S301: The first UE sends a request message for acquiring DRX configuration information of a second UE to a base station serving the first UE.

In this step, the first UE may send a request message to obtain the DRX configuration information of the second UE to the base station serving the first UE, and the request message may include the identity of the second UE; One or more other UEs other than the UE that need to perform D2D communication with the first UE. The first UE may request the base station serving the first UE to acquire DRX configuration information of one or more second UEs.

S302: The first UE receives the DRX configuration information of the second UE sent by the base station according to the request message.

In the embodiment of the present invention, both the first UE and the second UE are UEs covered by the cellular network, and the base station serving the first UE and the base station serving the second UE may be the same or different. Specifically, the first UE and the second UE may be UEs covered by the same cell of the same base station, UEs covered by the adjacent cell of the same base station, or UEs of different base stations. A UE covered by a neighboring cell. After receiving the request message sent by the first UE to obtain the DRX configuration information of the second UE, the base station serving the first UE may first determine whether the second UE belongs to its own service object, if the second UE belongs to its own service object object, then send the DRX configuration information configured by itself for the second UE to the first UE; if the second UE does not belong to its own service object, determine the base station serving the second UE, and send the The base station sends a request message to obtain the DRX configuration information of the second UE, and after receiving the DRX configuration information of the second UE sent by the base station serving the second UE, sends the DRX configuration information of the second UE to the first UE .

S303: The first UE determines the time when the second UE is in an active state according to the DRX configuration information of the second UE;

In this step, the DRX configuration information can be expressed in multiple ways. For example, the DRX configuration information can include information about the time when the second UE is in the active state. In this way, after receiving the DRX configuration information, the first UE can directly A time when the second UE is in an active state is determined. For another example, the DRX configuration information may include information about the time when the second UE is in the dormant state. In this way, after receiving the DRX configuration information, the first UE may set the time other than the time when the second UE is in the dormant state, It is determined as the time when the second UE is in the active state.

Optionally, the first UE may determine the time when the second UE is in the active state according to the DRX cycle, the DRX start offset and the duration of the active state in each DRX cycle included in the DRX configuration information of the second UE.

In a specific implementation process, in order to establish a D2D communication connection with the second UE, or to enable the second UE to successfully receive the signal sent by the first UE, the first UE may send a signal within the active state time of the second UE. The active state time here is specifically related to three parameters: DRX cycle (DRX Cycle), DRX start offset (drxStartOffset) and active state duration in each DRX cycle. Among them, drxStartOffset can be used to determine the start time of DRX, that is, the start time when UE enters the active state; it is specifically used to instruct UE to start the duration timer (On- duration Timer), enter the active state. After determining the start moment when the second UE enters the active state, the first UE may determine the duration of the active state of the second UE in each DRX Cycle by combining the DRXCycle and the duration of the active state.

If the first UE needs to communicate with multiple second UEs, and it is determined that the multiple second UEs are in the active state at different times, the first UE may send the Signal. That is, as long as there is a second UE in the active state, the first UE sends a signal during the time when the second UE is in the active state, as shown in FIG. 4 . Or, the first UE determines a minimum duration period including the time that the plurality of second UEs are in the active state, and sends signals within the minimum duration period, that is, the minimum duration period is a continuous time period, except In addition to the set of times when the multiple second UEs are in the active state, part of the time when the second UE is in the inactive state is also included, as shown in FIG. 5 .

S304: The first UE sends a signal to the second UE based on a D2D communication manner during the time when the second UE is in an active state.

In this step, the first UE sending a signal to the second UE specifically includes: the first UE sending a discovery signal (discovery signal) for the second UE to discover the first UE to the second UE , or send communication information to the second UE. The communication information here is the communication information transmitted to the second UE after the D2D communication connection is established between the first UE and the second UE, such as voice communication information, file information, and the like.

In this step, the first UE may send a discovery signal during the time when the second UE is in the active state, so that the second UE detects the first UE and initiates a D2D communication connection with the first UE; the first UE also After the D2D communication connection is established with the second UE, the communication information may be sent to the second UE during the time when the second UE is in an active state, so that the second UE can successfully receive the communication information.

Corresponding to the above-mentioned embodiments, the following embodiments of the present invention provide a signal transmission method based on the network side, and the specific implementation is similar to the above-mentioned embodiments, and repeated descriptions will not be repeated.

As shown in FIG. 6, it is a flowchart of a signal transmission method in D2D communication provided by Embodiment 2 of the present invention, including the following contents:

S601: The base station receives a request message for acquiring discontinuous reception cycle DRX configuration information of a second UE sent by a served first UE.

S602: The base station sends the DRX configuration information of the second UE to the first UE, the DRX configuration information is used by the first UE to determine the time when the second UE is in the active state, and according to the determined Sending a signal to the second UE during the time when the second UE is in the active state.

Before the above step S602, it may also include:

After the base station determines that the base station serving the second UE is a base station different from itself, the base station sends a request message for acquiring DRX configuration information of the second UE to the base station serving the second UE, and receives the request message serving the second UE. DRX configuration information of the second UE sent by the base station of the second UE.

The flow of the signal transmission method provided by the first embodiment and the second embodiment is described below through a specific embodiment.

As shown in FIG. 7 , it is a flowchart of a signal transmission method in D2D communication provided by Embodiment 3 of the present invention, including the following contents:

S701: The first UE sends a request message for acquiring DRX configuration information of a second UE to a base station serving the first UE.

S702: The base station serving the first UE judges whether it is the service object of the second UE, and after determining that it is the service object of the second UE, sends the DRX configuration information configured for the second UE to the first UE, otherwise go to step S703.

S703: After the base station serving the first UE determines that the base station serving the second UE is a base station different from itself, send a request for acquiring DRX configuration information of the second UE to the base station serving the second UE message, and receive the DRX configuration information of the second UE sent by the base station serving the second UE.

S704: After the first UE receives the DRX configuration information of the second UE sent by the base station serving the first UE, according to the DRX cycle, DRX start offset and each DRX cycle included in the DRX configuration information of the second UE, The duration of the internal active state determines the time during which the second UE is in the active state.

S705: The first UE sends a signal to the second UE based on a D2D communication manner during the time when the second UE is in an active state.

Another way for a UE to acquire DRX configuration information of other UEs in the present invention is introduced below.

As shown in FIG. 8 , it is a flow chart of the signal transmission method in D2D communication provided by Embodiment 4 of the present invention. In this embodiment, the first UE uses the DRX configuration information issued by the base station serving the first UE and the UE's application identification (ApplicationID) or the corresponding relationship of the group identification (Group ID) to determine the DRX configuration information of the second UE, including the following steps:

S801: The first UE receives a correspondence between DRX configuration information delivered by a base station serving the first UE and an Application ID or a Group ID of the UE.

In this step, the base station can configure the corresponding relationship between the DRX configuration information and the Application ID or GroupID for the serving UE. The specific form of the corresponding relationship delivered by the base station can be: first, directly delivering different Application IDs or GroupIDs The DRX configuration information corresponding to them respectively; the second type is to deliver the functional relational expression of the DRX configuration information related to the Application ID or the GroupID. For the embodiment of the first correspondence relationship, for example, the Application ID of a voice call is 100, and the DRX configuration information corresponding to the Application ID includes: DRX cycle (DRXCycle) is 200 subframes, DRX start offset (drxStartOffset) is 1 subframe frame (that is, the second UE enters DRX mode after 1 subframe from the current one), and the duration of the active state is 30 subframes; for the embodiment of the second correspondence, for example, DRX Cycle=Group ID modulo (modulo) The cell ID (Cell ID) refers to dividing the Group ID by the Cell ID and taking the remainder; the active state duration = (Group ID+Cell ID) modulo10, drxStartOffset = Group ID modulo DRX Cycle.

S802: The first UE determines DRX configuration information of the second UE according to the correspondence and the Application ID or Group ID of the second UE.

S803: The first UE determines the time when the second UE is in an active state according to the DRX configuration information of the second UE.

S804: The first UE sends a signal to the second UE based on a D2D communication manner during the time when the second UE is in an active state.

Here, the first UE sending a signal to the second UE specifically includes: the first UE sending a discovery signal (discovery signal) for enabling the second UE to detect the first UE to the second UE, or sending a discovery signal to the second UE. The second UE sends communication information. The communication information here is the communication information transmitted to the second UE after the D2D communication connection is established between the first UE and the second UE, such as voice communication information, file information, and the like.

In the embodiment of the present invention, the base station serving the first UE may instruct the serving UE to determine the DRX configuration information of itself and other UEs in the form of the above-mentioned issued correspondence; therefore, the first UE receives the After the corresponding relationship delivered by the base station of a UE, it can determine its own DRX configuration information, and can also determine the DRX configuration information of the second UE. The DRX configuration information needs to include the DRX cycle, DRX start offset and the duration of the active state in each DRX cycle; according to these configuration information, the first UE can determine the time when the second UE is in the active state, and when the second UE is in the active state At this time, the first UE may send a discovery signal or send communication information to the second UE.

In a specific implementation, if the first UE receives the corresponding relationship between the Application ID of multiple applications and the DRX configuration information, but is not sure which application ID the second UE specifically uses and the DRX configuration information corresponding to the Application ID, it can be based on The Application ID of each application determines the time when the second UE corresponding to each application is in the active state, and sends a signal in the set of time when the second UE corresponding to each application is in the active state; or, the first UE determines that each The minimum duration period of time when the second UE corresponding to the application is in the active state, and the signal is sent within the minimum duration period. Since the first UE and the second UE that need to communicate generally belong to the same group, that is, the Group IDs of the first UE and the second UE are the same, if the above correspondence is the correspondence between the Group ID and the DRX configuration information, then The first UE can directly determine the Group ID of the second UE; in fact, at this time, the first UE can directly consider that the time that the second UE is in the active state is the same as the time that the first UE is in the active state, that is, The first UE may send a signal to the second UE during the time it is in the active state.

In a specific implementation, in the corresponding relationship delivered by the base station serving the first UE, in addition to including the DRX cycle, DRX start offset, and the corresponding relationship between the duration of the active state in each DRX cycle and the Application ID or GroupID, It may also include the corresponding relationship between the timing duration of the DRX inactivity timer (DRX InactivityTimer), the timing duration of the DRX retransmission timer (DRXRetransmissionTimer) and the Application ID or GroupID; the first UE monitors and receives data according to these two parameters . Wherein, the specific meaning of the DRX InactivityTimer is: after the UE successfully decodes the PDCCH initially transmitted, the duration of maintaining the active state. The specific meaning of DRX RetransmissionTimer is: in the retransmission mode, the UE expects to receive downlink retransmission data for a period of time.

Corresponding to the above-mentioned embodiments, the following embodiments of the present invention provide a signal transmission method based on the network side, and the specific implementation is similar to the above-mentioned embodiments, and repeated descriptions will not be repeated.

As shown in FIG. 9, it is a flowchart of a signal transmission method in D2D communication provided by Embodiment 5 of the present invention, including the following steps:

S901: The base station determines the correspondence between the DRX configuration information and the Application ID or Group ID of the UE.

In this step, the base station determines the correspondence between the DRX configuration information and the UE's Application ID or Group ID, specifically including:

The base station configures the correspondence between the DRX configuration information and the Application ID or Group ID of each UE served by the base station, and

Obtain the correspondence between the DRX configuration information configured by other base stations and the Application ID or Group ID of each UE served by the other base stations.

In a specific implementation, different base stations may be independent from each other when configuring the corresponding relationship between DRX configuration information and ApplicationID or GroupID for the respective serving UEs, and may share the correspondingly configured corresponding relationship with each other. Different base stations may also configure the corresponding relationship through negotiation. For example, after the base station serving the first UE configures the corresponding relationship, it sends the corresponding relationship to other base stations, and other base stations directly adopt the corresponding relationship. Or, after configuring the corresponding relationship, the base station serving the first UE sends the corresponding relationship to other base stations, and the other base stations, according to the current communication status of the UE served by themselves, such as load information, The modified correspondence is sent to the base station serving the first UE, and both the base station serving the first UE and the other base stations adopt the modified correspondence.

S902: The base station sends the determined corresponding relationship to the serving first UE; the corresponding relationship is used by the first UE to determine the DRX configuration information of the second UE, and the DRX configuration information is used for the The first UE determines the time when the second UE is in the active state, and sends a signal to the second UE according to the determined time when the second UE is in the active state.

Optionally, before step S902, the method further includes: the base station receiving request information for acquiring the correspondence sent by the first UE.

In the above steps, the base station may send the corresponding relationship to the first UE after receiving the request information for obtaining the corresponding relationship sent by the first UE.

The flow of the signal transmission method provided by the fourth embodiment and the fifth embodiment is described below through a specific embodiment.

As shown in FIG. 10 , it is a flowchart of a signal transmission method in D2D communication provided by Embodiment 6 of the present invention, including the following steps:

S1001: The base station serving the first UE configures the correspondence between DRX configuration information and the Application ID or Group ID of each UE served, and obtains the DRX configuration information configured by other base stations and the Application ID or Group ID of each UE served by the other base station ID correspondence.

S1002: The base station serving the first UE delivers the correspondence relationship to the first UE.

S1003: After receiving the correspondence sent by the base station serving the first UE, the first UE determines the DRX configuration information of the second UE according to the correspondence and the Application ID or Group ID of the second UE;

S1004: The first UE determines the time that the second UE is in the active state according to the DRX cycle included in the DRX configuration information of the second UE, the DRX start offset drxStartOffset, and the duration of the active state in each DRX cycle;

S1005: The first UE sends a signal to the second UE during the time when the second UE is in an active state.

In the specific implementation process, the corresponding relationship between the DRX configuration information and the Application ID or GroupID can also be pre-specified in the agreement; when the first UE needs to communicate with the second UE, it can directly determine the corresponding relationship of the second UE according to the corresponding relationship. DRX configuration information, and send a signal according to the determined DRX configuration information of the second UE.

As shown in FIG. 11 , it is a flowchart of a signal transmission method in D2D communication provided by Embodiment 7 of the present invention, including the following steps.

S1101: The first UE determines the DRX configuration information of the second UE according to the preset correspondence between the DRX configuration information and the UE's application ID (Application ID) or group ID (Group ID);

S1102: The first UE sends a signal to the second UE according to the determined DRX configuration information of the second UE.

Based on the same inventive concept, an embodiment of the present invention also provides a signal transmission device in D2D communication corresponding to the signal transmission method in D2D communication. The transmission method is similar, so the implementation of the device can refer to the implementation of the method, and the repetition will not be repeated.

As shown in FIG. 12, it is a schematic structural diagram of a signal transmission device in D2D communication provided by Embodiment 8 of the present invention, including:

An obtaining module 121, configured to obtain the continuous reception cycle DRX configuration information of the second UE for the first UE;

A determining module 122, configured to determine the time when the second UE is in an active state according to the DRX configuration information of the second UE acquired by the acquiring module 121;

The sending module 123 is configured to send a signal to the second UE based on a D2D communication manner during the time determined by the determining module 122 that the second UE is in an active state.

Optionally, the acquisition module 121 is specifically configured to:

Sending a request message to the base station serving the first UE, and receiving discontinuous reception cycle DRX configuration information of the second UE sent by the base station, where the DRX configuration information of the second UE is determined according to the request message.

Optionally, the acquisition module 121 is specifically configured to:

Receive the corresponding relationship between the discontinuous reception cycle DRX configuration information issued by the base station serving the first UE and the UE's application identifier Application ID or group identifier Group ID; according to the corresponding relationship and the second UE's Application ID or Group ID, determining DRX configuration information of the second UE;

Optionally, the sending module 123 is specifically configured to:

Based on the D2D communication manner, sending a discovery signal for enabling the second UE to detect the first UE to the second UE, or sending communication information to the second UE.

Optionally, the determining module 122 is specifically configured to:

The time during which the second UE is in the active state is determined according to the DRX cycle, the DRX start offset, and the duration of the active state in each DRX cycle included in the DRX configuration information of the second UE.

As shown in FIG. 13 , it is a schematic structural diagram of a signal transmission device in D2D communication provided by Embodiment 9 of the present invention, including:

The receiving module 131 is configured to receive a request message for acquiring discontinuous reception cycle DRX configuration information of the second UE sent by the serving first user equipment UE;

The sending module 132 is configured to send the DRX configuration information of the second UE to the first UE according to the request message received by the receiving module 131, and the DRX configuration information is used by the first UE to determine the The time when the second UE is in the active state, and sending a signal to the second UE according to the determined time when the second UE is in the active state.

Optionally, the sending module 132 is further configured to, before sending the DRX configuration information of the second UE to the first UE, send to the base station serving the second UE the A request message for DRX configuration information;

The receiving module 131 is further configured to receive the DRX configuration information of the second UE sent by the base station serving the second UE.

As shown in FIG. 14, it is a schematic structural diagram of a signal transmission device in D2D communication provided by Embodiment 10 of the present invention, including:

The determination module 141 is configured to determine the correspondence between the discontinuous reception cycle DRX configuration information and the application identification Application ID or group identification Group ID of the user equipment UE;

The sending module 142 is configured to send the corresponding relationship determined by the determining module 141 to the first UE served by the base station; the corresponding relationship is used for the first UE to determine the DRX configuration information of the second UE, and the The DRX configuration information is used by the first UE to determine the time when the second UE is in the active state, and send a signal to the second UE according to the determined time when the second UE is in the active state.

Optionally, the determining module 141 is specifically configured to:

Configuring the correspondence between the DRX configuration information and the Application ID or Group ID of each UE served by the base station, and

Obtain the correspondence between the DRX configuration information configured by other base stations and the Application ID or Group ID of each UE served by the other base stations.

Optionally, the device also includes:

The receiving module 143 is configured to receive request information for obtaining the corresponding relationship sent by the first UE before the sending module sends the corresponding relationship to the serving first UE.

As shown in FIG. 15 , it is a schematic structural diagram of a signal transmission device in D2D communication provided by Embodiment 11 of the present invention, including:

The receiver 151 is configured to acquire the continuous reception cycle DRX configuration information of the second UE for the first user equipment UE;

The processor 152 is configured to determine the time when the second UE is in an active state according to the DRX configuration information of the second UE acquired by the receiver 151;

The transmitter 153 is configured to send a signal to the second UE based on a D2D communication manner during the time determined by the processor 152 that the second UE is in an active state.

Optionally, the transmitter 153 is further configured to send a request message to a base station serving the first UE;

The receiver 151 is specifically configured to: receive the discontinuous reception cycle DRX configuration information of the second UE sent by the base station, where the DRX configuration information of the second UE is determined according to the request message sent by the transmitter.

Optionally, the receiver 151 is specifically configured to: receive the correspondence between the discontinuous reception cycle DRX configuration information issued by the base station serving the first UE and the UE's Application ID or group ID; according to the The corresponding relationship and the Application ID or Group ID of the second UE determine the DRX configuration information of the second UE;

Optionally, the transmitter 153 is specifically used for:

Based on the D2D communication manner, sending a discovery signal for enabling the second UE to detect the first UE to the second UE, or sending communication information to the second UE.

Optionally, the processor 152 is specifically configured to:

The time during which the second UE is in the active state is determined according to the DRX cycle, the DRX start offset, and the duration of the active state in each DRX cycle included in the DRX configuration information of the second UE.

As shown in FIG. 16, it is a schematic structural diagram of a signal transmission device in D2D communication provided by Embodiment 12 of the present invention, including:

The receiver 161 is configured to receive a request message for acquiring discontinuous reception cycle DRX configuration information of the second UE sent by the serving first user equipment UE;

The transmitter 162 is configured to send the DRX configuration information of the second UE to the first UE according to the request message received by the receiver 161, where the DRX configuration information is used by the first UE to determine the The time when the second UE is in the active state, and sending a signal to the second UE according to the determined time when the second UE is in the active state.

Optionally, the transmitter 162 is further configured to, before sending the DRX configuration information of the second UE to the first UE, send to the base station serving the second UE the A request message for DRX configuration information;

The receiver 161 is further configured to receive DRX configuration information of the second UE sent by the base station serving the second UE.

As shown in FIG. 17 , it is a schematic structural diagram of a signal transmission device in D2D communication provided by Embodiment 13 of the present invention, including:

The processor 171 is configured to determine the correspondence between the discontinuous reception cycle DRX configuration information and the application identifier Application ID or group identifier Group ID of the user equipment UE;

The transmitter 172 is configured to send the corresponding relationship determined by the processor 171 to the first UE served by the base station; the corresponding relationship is used for the first UE to determine the DRX configuration information of the second UE, and the The DRX configuration information is used by the first UE to determine the time when the second UE is in the active state, and send a signal to the second UE according to the determined time when the second UE is in the active state.

Optionally, the processor 171 is specifically configured to:

Configuring the correspondence between the DRX configuration information and the Application ID or Group ID of each UE served by the base station, and

Obtain the correspondence between the DRX configuration information configured by other base stations and the Application ID or Group ID of each UE served by the other base stations.

Optionally, the device also includes:

The receiver 173 is configured to receive request information for acquiring the correspondence sent by the first UE before the sender sends the correspondence to the serving first UE.

Those skilled in the art should understand that the embodiments of the present invention may be provided as methods, systems, or computer program products. Accordingly, the present invention can take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) having computer-usable program code embodied therein.

The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It should be understood that each procedure and/or block in the flowchart and/or block diagram, and a combination of procedures and/or blocks in the flowchart and/or block diagram can be realized by computer program instructions. These computer program instructions may be provided to a general purpose computer, special purpose computer, embedded processor, or processor of other programmable data processing equipment to produce a machine such that the instructions executed by the processor of the computer or other programmable data processing equipment produce a An apparatus for realizing the functions specified in one or more procedures of the flowchart and/or one or more blocks of the block diagram.

These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing apparatus to operate in a specific manner, such that the instructions stored in the computer-readable memory produce an article of manufacture comprising instruction means, the instructions The device realizes the function specified in one or more procedures of the flowchart and/or one or more blocks of the block diagram.

These computer program instructions can also be loaded onto a computer or other programmable data processing device, causing a series of operational steps to be performed on the computer or other programmable device to produce a computer-implemented process, thereby The instructions provide steps for implementing the functions specified in the flow chart or blocks of the flowchart and/or the block or blocks of the block diagrams.

While preferred embodiments of the invention have been described, additional changes and modifications to these embodiments can be made by those skilled in the art once the basic inventive concept is appreciated. Therefore, it is intended that the appended claims be construed to cover the preferred embodiment as well as all changes and modifications which fall within the scope of the invention.

Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalent technologies, the present invention also intends to include these modifications and variations.

Claims (24)

1. an apparatus for signal transmission in device-to-device D2D communication, the apparatus comprising:

An obtaining module, configured to obtain, for a first UE, continuous reception cycle DRX configuration information of a second UE;

A determining module, configured to determine, according to the DRX configuration information of the second UE acquired by the acquiring module, a time when the second UE is in an active state;

a sending module, configured to send a signal to the second UE based on the D2D communication manner within the time that the second UE is in the active state determined by the determining module;

Wherein the obtaining module is specifically configured to:

receiving a corresponding relation between discontinuous reception cycle DRX configuration information issued by a base station serving first UE and an Application identifier (Application ID) or a Group identifier (Group ID) of the UE; and determining DRX configuration information of the second UE according to the corresponding relation and the Application ID or the Group ID of the second UE.

2. the apparatus of claim 1, wherein the acquisition module is specifically configured to:

the method comprises the steps of sending a request message to a base station serving a first UE, and receiving discontinuous reception cycle (DRX) configuration information of a second UE sent by the base station, wherein the DRX configuration information of the second UE is determined according to the request message.

3. The apparatus of claim 1, wherein the sending module is specifically configured to:

and sending a discovery signal for enabling the second UE to detect the first UE or sending communication information to the second UE based on the D2D communication mode.

4. The apparatus of any one of claims 1 to 3, wherein the determining module is specifically configured to:

and determining the time of the second UE in the active state according to the DRX period, the DRX starting offset and the duration of the active state in each DRX period, which are included in the DRX configuration information of the second UE.

5. An apparatus for signal transmission in device-to-device D2D communication, the apparatus comprising:

A receiving module, configured to receive a request message sent by a serving first user equipment UE to obtain DRX configuration information of a discontinuous reception cycle of a second UE;

a sending module, configured to send DRX configuration information of the second UE to the first UE according to the request message received by the receiving module, where the DRX configuration information is used for the first UE to determine a time when the second UE is in an active state, and send a signal to the second UE according to the determined time when the second UE is in the active state;

The sending module is further configured to send a request message for acquiring DRX configuration information of the second UE to a base station serving the second UE before sending the DRX configuration information of the second UE to the first UE;

The receiving module is further configured to receive DRX configuration information of the second UE sent by a base station serving the second UE;

The sending module is specifically configured to issue, to the first UE, a correspondence between DRX configuration information and an Application identifier Application ID or a Group identifier Group ID of the UE.

6. An apparatus for signal transmission in device-to-device D2D communication, the apparatus comprising:

a determining module, configured to determine a correspondence between discontinuous reception cycle DRX configuration information and an Application identifier Application ID or a Group identifier Group ID of a user equipment UE;

A sending module, configured to send the corresponding relationship determined by the determining module to a first UE served by a base station; the corresponding relation is used for the first UE to determine DRX configuration information of a second UE, the DRX configuration information is used for the first UE to determine the time of the second UE in the active state, and signals are sent to the second UE according to the determined time of the second UE in the active state.

7. the apparatus of claim 6, wherein the determination module is specifically configured to:

configuring the corresponding relation between the DRX configuration information and the Application ID or Group ID of each UE served by the base station, and

and acquiring the corresponding relation between the DRX configuration information configured by other base stations and the Application ID or Group ID of each UE served by the other base stations.

8. The apparatus of claim 6 or 7, wherein the apparatus further comprises:

a receiving module, configured to receive request information for obtaining the corresponding relationship sent by a first UE before the sending module issues the corresponding relationship to a served first UE.

9. An apparatus for signal transmission in device-to-device D2D communication, the apparatus comprising:

the receiver is used for acquiring continuous reception cycle DRX configuration information of a second UE for a first UE;

a processor, configured to determine, according to the DRX configuration information of the second UE acquired by the receiver, a time when the second UE is in an active state;

A transmitter, configured to transmit a signal to the second UE based on the D2D communication manner during a time that the second UE is in the active state as determined by the processor;

Wherein the receiver is specifically configured to: receiving a corresponding relation between discontinuous reception cycle DRX configuration information issued by a base station serving first UE and an Application identifier (Application ID) or a Group identifier (Group ID) of the UE; and determining DRX configuration information of the second UE according to the corresponding relation and the Application ID or the Group ID of the second UE.

10. The apparatus of claim 9, wherein the transmitter is further for transmitting a request message to a base station serving the first UE;

The receiver is specifically configured to: and receiving discontinuous reception cycle (DRX) configuration information of a second UE, which is sent by the base station, wherein the DRX configuration information of the second UE is determined according to the request message sent by the sender.

11. the apparatus of claim 9, wherein the transmitter is specifically configured to:

And sending a discovery signal for enabling the second UE to detect the first UE or sending communication information to the second UE based on the D2D communication mode.

12. the apparatus of any of claims 9 to 11, wherein the processor is specifically configured to:

And determining the time of the second UE in the active state according to the DRX period, the DRX starting offset and the duration of the active state in each DRX period, which are included in the DRX configuration information of the second UE.

13. an apparatus for signal transmission in device-to-device D2D communication, the apparatus comprising:

a receiver, configured to receive a request message sent by a serving first user equipment UE for acquiring discontinuous reception cycle, DRX, configuration information of a second UE;

a transmitter, configured to send DRX configuration information of the second UE to the first UE according to the request message received by the receiver, where the DRX configuration information is used for the first UE to determine a time when the second UE is in an active state, and send a signal to the second UE according to the determined time when the second UE is in the active state;

wherein, the transmitter is further configured to transmit a request message for acquiring the DRX configuration information of the second UE to a base station serving the second UE before transmitting the DRX configuration information of the second UE to the first UE;

The receiver is further configured to receive DRX configuration information of the second UE sent by a base station serving the second UE;

the transmitter is specifically configured to issue, to the first UE, a correspondence between DRX configuration information and an Application identifier Application ID or a Group identifier Group ID of the UE.

14. An apparatus for signal transmission in device-to-device D2D communication, the apparatus comprising:

The processor is used for determining the corresponding relation between the DRX configuration information and the Application identifier Application ID or the Group identifier Group ID of the UE;

The transmitter is used for transmitting the corresponding relation determined by the processor to a first UE served by a base station; the corresponding relation is used for the first UE to determine DRX configuration information of a second UE, the DRX configuration information is used for the first UE to determine the time of the second UE in the active state, and signals are sent to the second UE according to the determined time of the second UE in the active state.

15. the apparatus of claim 14, wherein the processor is specifically configured to:

Configuring the corresponding relation between the DRX configuration information and the Application ID or Group ID of each UE served by the base station, and

And acquiring the corresponding relation between the DRX configuration information configured by other base stations and the Application ID or Group ID of each UE served by the other base stations.

16. the apparatus of claim 14 or 15, wherein the apparatus further comprises:

And the receiver is used for receiving the request information for acquiring the corresponding relation sent by the first UE before the sender sends the corresponding relation to the served first UE.

17. a method of signal transmission in a device-to-device, D2D, communication, the method comprising:

the method comprises the steps that first User Equipment (UE) acquires discontinuous reception cycle (DRX) configuration information of second UE;

The first UE determines the time of the second UE in an active state according to the DRX configuration information of the second UE;

The first UE sends signals to the second UE based on a D2D communication mode within the time when the second UE is in an active state;

the method for acquiring the DRX configuration information of the second UE by the first UE comprises the following steps:

The first UE receives the corresponding relation between the discontinuous reception cycle DRX configuration information issued by a base station serving the first UE and an Application identifier Application ID or a Group identifier Group ID of the UE;

And the first UE determines the DRX configuration information of the second UE according to the corresponding relation and the Application ID or the Group ID of the second UE.

18. the method of claim 17, wherein the first UE obtaining DRX configuration information of a second UE comprises:

A first User Equipment (UE) sends a request message to a base station serving the first UE;

And the first UE receives DRX configuration information of a second UE sent by the base station, wherein the DRX configuration information of the second UE is determined according to the request message.

19. The method of any of claims 17, wherein the first UE sending a signal to the second UE based on D2D communication, comprising:

the first UE transmits a discovery signal for enabling the second UE to detect the first UE, or transmits communication information to the second UE, to the second UE based on a D2D communication scheme.

20. The method of any of claims 17 to 19, wherein the determining, by the first UE, the time when the second UE is in an active state according to the DRX configuration information of the second UE comprises:

And the first UE determines the time of the second UE in the active state according to the DRX period, the DRX starting offset and the duration of the active state in each DRX period, which are included in the DRX configuration information of the second UE.

21. a method of signal transmission in a device-to-device, D2D, communication, the method comprising:

a base station receives a request message which is sent by first User Equipment (UE) served by the base station and is used for acquiring discontinuous reception cycle (DRX) configuration information of second UE;

The base station sends DRX configuration information of the second UE to the first UE, wherein the DRX configuration information is used for the first UE to determine the time of the second UE in the active state and send a signal to the second UE according to the determined time of the second UE in the active state;

Wherein before the base station sends the DRX configuration information of the second UE to the first UE, the method further includes:

after determining that the base station serving the second UE is a different base station, the base station sends a request message for acquiring DRX configuration information of the second UE to the base station serving the second UE, and receives the DRX configuration information of the second UE sent by the base station serving the second UE;

wherein the sending, by the base station, the DRX configuration information of the second UE to the first UE includes:

And the base station issues the corresponding relation between the DRX configuration information and the Application identifier Application ID or the Group identifier Group ID of the UE to the first UE.

22. A method of signal transmission in a device-to-device, D2D, communication, the method comprising:

The base station determines the corresponding relation between the discontinuous reception cycle DRX configuration information and an Application identifier Application ID or a Group identifier Group ID of user equipment UE;

the base station issues the determined corresponding relation to the served first UE; the corresponding relation is used for the first UE to determine DRX configuration information of a second UE, the DRX configuration information is used for the first UE to determine the time of the second UE in the active state, and signals are sent to the second UE according to the determined time of the second UE in the active state.

23. The method of claim 22, wherein the base station determining the correspondence of DRX configuration information to an Application ID or Group ID of the UE comprises:

the base station configures the corresponding relation between the DRX configuration information and the Application ID or Group ID of each UE served by the base station, and

and acquiring the corresponding relation between the DRX configuration information configured by other base stations and the Application ID or Group ID of each UE served by the other base stations.

24. The method according to claim 21 or 23, wherein before the base station issues the determined correspondence to the served first UE, further comprising:

and the base station receives request information for acquiring the corresponding relation, which is sent by the first UE.