CN105379406B

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

Info

Publication number: CN105379406B
Application number: CN201480038025.9A
Authority: CN
Inventors: 苗金华; 权威; 高永强; 张丹丹; 王瑜
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2014-05-21
Filing date: 2014-05-21
Publication date: 2019-12-06
Anticipated expiration: 2034-05-21
Also published as: CN105379406A; WO2015176251A1

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 field of mobile communications technologies, and in particular, to a signal transmission method and apparatus in D2D communication.

Background

Device-to-Device (D2D) communication based on Long Term Evolution (LTE) system is a technology that allows terminals to directly communicate by multiplexing cell resources under the control of a cellular communication system, and the communication between the terminals can be switched no longer through a base station. The D2D communication can increase the spectrum efficiency of the cellular communication system and reduce the terminal transmission power, and is particularly suitable for short-distance communication between terminals. In D2D communication, a User Equipment (UE) has an Application ID (Application ID) and a Group ID (Group ID), where different applications (e.g., voice call, public safety broadcast, etc.) correspond to different Application IDs, and different UE sets (each UE set includes multiple UEs) correspond to different Group IDs.

In LTE, a Discontinuous Reception (DRX) function Control entity of a User Equipment (UE) is located in a Media Access Control (MAC) layer of a protocol stack; the main function of the system is to Control and send an instruction to a Physical layer, inform the Physical layer to monitor a Physical Downlink Control Channel (PDCCH) at a specific time, and keep a receiving antenna in a sleep state without starting the receiving antenna at the rest of time; the specific time here is the time when the UE is in the active state; the time when the UE is in the sleep state is the time when the UE is in the inactive state. Through the DRX mechanism, the system resource configuration can be optimized, and the power consumption of the UE is saved.

when the DRX mechanism is applied to D2D communication, there is a possibility that, in both parties that need to communicate, the time when the signal sender sends a signal is the time when the other party is in an inactive state; in this case, the other party cannot receive the signal transmitted by the signal transmission method, resulting in a failure in signal transmission.

Disclosure of Invention

Embodiments of the present invention provide a signal transmission method and apparatus, so as to solve a problem that a DRX mechanism may cause a failure in signal transmission when applied to D2D communication.

in a first aspect, there is provided a signal transmission apparatus in device-to-device D2D communication, the apparatus comprising:

an obtaining module, configured to obtain, for a first user equipment 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 during the time that the second UE is in the active state, which is determined by the determining module.

with reference to the first aspect, in a first possible implementation manner, the obtaining 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.

with reference to the first aspect, in a second possible implementation manner, 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; 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;

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:

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.

With reference to the first aspect or any one of the first to third possible implementation manners of the first aspect, in a fourth possible implementation manner, 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.

In a second aspect, there is provided a signal transmission apparatus in device-to-device D2D communication, 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.

with reference to the second aspect, in a first possible implementation manner, the sending module is further configured to send, to a base station serving the second UE, a request message for acquiring DRX configuration information of 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.

in a third aspect, there is provided a signal transmission apparatus 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 the 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.

with reference to the third aspect, in a first possible implementation manner, the determining 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.

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

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.

in a fourth aspect, there is provided a signal transmission apparatus in device-to-device D2D communication, 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 the time that the second UE is in the active state as determined by the processor.

with reference to the fourth aspect, in a first possible implementation manner, the transmitter is further configured to transmit a request message to a base station serving a 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.

with reference to the fourth aspect, in a second possible implementation manner, 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; 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;

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:

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

in a fifth aspect, there is provided a signal transmission apparatus in device-to-device D2D communication, the apparatus comprising:

a receiver, configured to receive a request message sent by a serving first 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.

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

In a sixth aspect, there is provided a signal transmission apparatus in device-to-device D2D communication, 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.

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

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

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.

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

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.

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

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.

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

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.

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 sending, by the first UE, a signal to the second UE based on a D2D communication manner includes:

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.

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

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.

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

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

And 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.

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

and after determining that the base station serving the second UE is a different base station, the base station sends a request message for acquiring the 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.

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

the base station determines the corresponding relation between the discontinuous reception cycle DRX configuration information and the Application identification ID or the Group identification Group ID of the 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.

with reference to the ninth aspect, in a first possible implementation manner, the determining, by the base station, a corresponding relationship between the DRX configuration information and an Application ID or a Group ID of the UE includes:

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

With reference to the ninth aspect or the first possible implementation manner of the ninth aspect, in a second possible implementation manner, before the issuing, by the base station, the determined correspondence to the served first UE, the method further includes:

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

By adopting the method or apparatus provided in any of the above aspects, when the DRX mechanism is applied to D2D communication, the first UE may obtain DRX configuration information of a second UE that needs to communicate with the first UE, determine, according to the DRX configuration information of the second UE, a time when the second UE is in an active state, and further determine, according to the time when the second UE is in the active state, a time when a signal is sent to the second UE. 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.

drawings

FIG. 1a is a schematic diagram of a system configuration when a base station serving a first UE and a base station serving a second UE are the same base station;

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

FIG. 2 is a diagram illustrating a first UE transmitting 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 according to an embodiment of the present invention;

FIG. 4 is a diagram illustrating a first UE transmitting signals in a set of times when a plurality of second UEs are active;

FIG. 5 is a diagram illustrating a first UE transmitting signals during a minimum duration that includes times when a plurality of second UEs are in an active state;

fig. 6 is a flowchart of a signal transmission method in D2D communication according to a second embodiment of the present invention;

fig. 7 is a flowchart of a signal transmission method in D2D communication according to a third embodiment of the present invention;

fig. 8 is a flowchart of a signal transmission method in D2D communication according to a fourth embodiment of the present invention;

fig. 9 is a flowchart of a signal transmission method in D2D communication according to a fifth embodiment of the present invention;

Fig. 10 is a flowchart of a signal transmission method in D2D communication according to a sixth embodiment of the present invention;

Fig. 11 is a flowchart of a signal transmission method in D2D communication according to a seventh embodiment of the present invention;

fig. 12 is a schematic structural diagram of a signal transmission device in D2D communication according to an eighth embodiment of the present invention;

fig. 13 is a schematic structural diagram of a signal transmission apparatus in D2D communication according to a ninth embodiment of the present invention;

Fig. 14 is a schematic structural diagram of a signal transmission apparatus in D2D communication according to a tenth embodiment of the present invention;

fig. 15 is a schematic structural diagram of a signal transmission device in D2D communication according to an eleventh embodiment of the present invention;

Fig. 16 is a schematic structural diagram of a signal transmission device in D2D communication according to a twelfth embodiment of the present invention;

fig. 17 is a schematic structural diagram of a signal transmission device in D2D communication according to a thirteenth embodiment of the present invention.

Detailed Description

The signal transmission system in D2D communication provided in 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, where the base station serving the first UE and the base station serving the second UE may be the same base station or different base stations. Fig. 1a is a schematic diagram of a system structure when a base station serving a first UE and a base station serving a second UE are the same base station, and fig. 1b is a schematic diagram of a system structure when a base station serving a first UE and a base station serving a second UE are different base stations.

If the DRX mechanism is applied to D2D communication, when a first UE transmits a signal to a second UE, the second UE can receive the signal transmitted by the first UE only in an active state, as shown in fig. 2, the first UE does not transmit the signal to the second UE within a time period when the second UE is in the active state, but transmits the signal to the second UE within a time period when the second UE is in an inactive state, so that the second UE cannot receive the signal transmitted by the first UE.

in the embodiment of the present invention, when the DRX mechanism is applied to D2D communication, a first UE may obtain DRX configuration information of a second UE that needs to communicate with the first UE, determine, according to the DRX configuration information of the second UE, a time when the second UE is in an active state, and further determine, according to the time when the second UE is in the active state, a time when a signal is sent to the second UE, thereby improving a probability of successful signal sending; the first UE may obtain the DRX configuration information of the second UE in multiple ways, and two examples are given in the present invention, where one example is to obtain the DRX configuration information of the second UE by requesting the base station, and the other example is to determine the DRX configuration information of the UE with the set Application ID or Group ID according to a corresponding relationship between the Application ID or Group ID of the UE issued by the base station and the DRX configuration information. The method for signal transmission according to the embodiments of the present invention is described in further detail below with reference to the drawings.

fig. 3 is a flowchart of a signal transmission method in D2D communication according to an embodiment of the present invention. In this embodiment, the first UE acquires the DRX configuration information of the second UE by requesting the base station, which includes the following contents.

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 for acquiring DRX configuration information of the second UE to a base station serving the first UE, where the request message may include an identifier of the second UE; the second UE refers to other one or more UEs, other than the first UE, that need D2D communication with the first UE. The first UE may request acquisition of DRX configuration information of other one or more second UEs from a base station serving the first UE.

s302: and the first UE receives DRX configuration information of the second UE, which is sent by the base station according to the request message.

in the embodiment of the present invention, the first UE and the second UE are both UEs under the coverage of 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 under the coverage of the same cell of the same base station, or UEs under the coverage of neighboring cells of different base stations. After receiving a request message sent by a first UE to acquire DRX configuration information of a second UE, a base station serving the first UE may first determine whether the second UE belongs to a service object of the base station, and if the second UE belongs to the service object of the base station, send DRX configuration information configured for the second UE to the first UE; if the second UE does not belong to the service object of the second UE, determining a base station serving the second UE, sending a request message for acquiring the DRX configuration information of the second UE to the base station serving the second UE, and sending the DRX configuration information of the second UE to the first UE after receiving the DRX configuration information of the second UE sent by the base station serving the second UE.

s303: the first UE determines the time of the second UE in an active state according to the DRX configuration information of the second UE;

in this step, the DRX configuration information may have various embodiments, for example, the DRX configuration information may include information of the time when the second UE is in the active state, so that the first UE may directly determine the time when the second UE is in the active state after receiving the DRX configuration information. For another example, the DRX configuration information may include information of a time when the second UE is in a dormant state, so that after receiving the DRX configuration information, the first UE may determine a time other than the time when the second UE is in the dormant state as a time when the second UE is in an active state.

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

In a specific implementation, the first UE may send a signal within an active state time of the second UE in order to establish a D2D communication connection with the second UE, or enable the second UE to successfully receive the signal sent by the first UE. The active state time here is specifically related to three parameters of a DRX Cycle (DRX Cycle), a DRX start offset (drxStartOffset), and an active state duration per DRX Cycle. Wherein, drxStartOffset may be used to determine the starting time of DRX, that is, the starting time when the UE enters the active state; it is specifically used to instruct the UE to enter an active state at the nth (N is a non-negative integer) subframe On-duration Timer. After determining the starting time of the second UE entering the active state, the first UE may determine the active state duration of the second UE in each DRX Cycle by combining the DRX Cycle and the active state duration.

if the first UE needs to communicate with a plurality of second UEs and it is determined that the plurality of second UEs are in the active state for different times, the first UE may send a signal in a set of times that the plurality of second UEs are in the active state. That is, as long as there is one second UE in the active state, the first UE transmits a signal during the time that the second UE is in the active state, as shown in fig. 4. Alternatively, the first UE determines a minimum duration period including the time when the plurality of second UEs are in the active state, and transmits a signal within the minimum duration period, that is, the minimum duration period is a continuous period and includes a part of the time when the second UEs are in the inactive state in addition to the set of the time when the plurality of second UEs are in the active state, as shown in fig. 5.

s304: 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.

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

In this step, the first UE may send a discovery signal during the time that 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 may also send the communication information to the second UE after establishing a communication connection D2D with the second UE and during the time that the second UE is in the active state, so that the second UE successfully receives the communication information.

corresponding to the above embodiments, the following embodiments of the present invention provide a signal transmission method based on a network side, and the specific implementation is similar to the above embodiments, and repeated details are not repeated.

As shown in fig. 6, a flowchart of a signal transmission method in D2D communication according to a second embodiment of the present invention includes the following contents:

S601: the base station receives a request message sent by a first UE serving for acquiring discontinuous reception cycle (DRX) configuration information of a second UE.

s602: and 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.

Before the step S602, the method may further include:

and after determining that the base station serving the second UE is a base station different from the base station, the base station sends a request message for acquiring the 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.

The following describes the signal transmission method flow provided in the first embodiment and the second embodiment by a specific embodiment.

as shown in fig. 7, a flowchart of a signal transmission method in D2D communication according to a third embodiment of the present invention includes the following steps:

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

s703: and after determining that the base station serving the first UE is a base station different from the base station serving the second UE, the base station serving the first UE sends a request message for acquiring the 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.

s704: after receiving DRX configuration information of second UE sent by a base station serving the first UE, the first UE determines the time of the second UE in an active state according to a DRX period, DRX starting offset and duration of the active state in each DRX period included in the DRX configuration information of the second UE.

s705: and the first UE transmits signals to the second UE based on the D2D communication mode within the time when the second UE is in the activated state.

Another way of acquiring DRX configuration information of other UEs by the UE according to the present invention is described below.

As shown in fig. 8, which is a flowchart of a signal transmission method in D2D communication according to a fourth embodiment of the present invention, in this embodiment, a first UE determines DRX configuration information of a second UE according to a correspondence between 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, including the following steps:

s801: the first UE receives the corresponding relation between the DRX configuration information issued by the base station serving the first UE and the Application ID or the Group ID of the UE.

in this step, the base station may configure a corresponding relationship between the DRX configuration information and the Application ID or GroupID for the served UE, and the embodiment of the corresponding relationship issued by the base station may specifically be: firstly, directly issuing DRX configuration information corresponding to different Application IDs or groupIDs respectively; and secondly, issuing a functional relation of DRX configuration information about Application ID or GroupID. For the first mapping form, for example, the Application ID of the voice call is 100, and the DRX configuration information corresponding to the Application ID includes: a DRX Cycle (DRX Cycle) is 200 subframes, a DRX start offset (drxStartOffset) is 1 subframe (that is, after 1 subframe from the current time, the second UE enters the DRX mode), and an active state duration is 30 subframes; for the second corresponding form, for example, DRX Cycle is Group ID modulo (modulo) Cell ID, that is, the Group ID is divided by the Cell ID to obtain the remainder; active duration (Group ID + Cell ID) module 10, drxStartOffset Group DRX Cycle.

s802: 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.

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

s804: 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.

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

In the embodiment of the present invention, the base station serving the first UE may instruct the serving UE to determine DRX configuration information of itself and other UEs in the form of the above issued correspondence; therefore, after receiving the corresponding relationship sent by the base station serving the first UE, the first UE may determine the DRX configuration information of the first UE, or may determine the DRX configuration information of the second UE. The DRX configuration information needs to include a DRX period, a DRX starting offset and an active state duration in each DRX period; based on the configuration information, the first UE may determine when the second UE is in an active state, and at which time the first UE may transmit a discovery signal or transmit communication information to the second UE.

in a specific implementation, if the first UE receives the correspondence between the Application IDs of multiple applications and the DRX configuration information, and does not determine which Application ID of the Application corresponds to the DRX configuration information specifically adopted by the second UE, the time when the second UE corresponding to each Application is in the active state may be determined according to the Application ID of each Application, and a signal is sent in a set of times when the second UE corresponding to each Application is in the active state; alternatively, the first UE determines a minimum duration period including a time during which the second UE corresponding to each application is in the active state, and transmits a signal within the minimum duration period. Because the first UE and the second UE needing 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 correspondence is the correspondence between the Group ID and the DRX configuration information, the first UE may directly determine the Group ID of the second UE; in fact, at this time, the first UE may directly consider that the time when the second UE is in the active state is the same as the time when the first UE is in the active state, that is, the first UE may transmit a signal to the second UE within the time when the first UE is in the active state.

in a specific implementation, the correspondence sent by the base station serving the first UE may include, in addition to the correspondence between the DRX cycle, the DRX start offset, and the active state duration in each DRX cycle and the Application ID or the GroupID, the correspondence between the timing duration of a DRX inactivity timer (DRX inactivity timer), the timing duration of a DRX retransmission timer (DRX retransmission timer), and the Application ID or the GroupID, respectively; the first UE listens and receives data according to the two parameters. Wherein, the specific meaning of DRX InactivityTimer is as follows: the duration of the active state is maintained after the UE successfully decodes the initially transmitted PDCCH. The specific meaning of DRX retransmission timer is: in the retransmission mode, the UE expects a duration of receiving downlink retransmission data.

as shown in fig. 9, a flowchart of a signal transmission method in D2D communication according to a fifth embodiment of the present invention includes the following steps:

s901: and the base station determines the corresponding relation between the DRX configuration information and the Application ID or the Group ID of the UE.

in this step, the base station determines a correspondence between the DRX configuration information and the Application ID or Group ID of the UE, and specifically includes:

in a specific implementation, different base stations may be independent from each other when configuring a corresponding relationship between DRX configuration information and an Application ID or GroupID for respective served UEs, and may share the corresponding relationship configured for each other. Different base stations may also configure the corresponding relationship in a negotiation manner, for example, after the base station serving the first UE configures the corresponding relationship, the corresponding relationship is sent to other base stations, and the other base stations directly adopt the corresponding relationship; or after the corresponding relation is configured, the base station serving the first UE sends the corresponding relation to other base stations, the other base stations modify the corresponding relation according to the current communication state of the UE served by the other base stations, such as load information, and send the modified corresponding relation to the base station serving the first UE, and the base station serving the first UE and the other base stations both adopt the modified corresponding relation.

s902: 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.

Optionally, before step S902, the method further includes: and the base station receives request information for acquiring the corresponding relation, which is sent by the first UE.

In the above step, the base station may issue the corresponding relationship to the first UE after receiving the request information for acquiring the corresponding relationship sent by the first UE.

The following describes the signal transmission method flows provided in the fourth and fifth embodiments by a specific embodiment.

As shown in fig. 10, a flowchart of a signal transmission method in D2D communication according to a sixth embodiment of the present invention includes the following steps:

s1001: the base station serving the first UE configures the corresponding relation between the DRX configuration information and the Application ID or the Group ID of each UE served by the first UE, and acquires the corresponding relation between the DRX configuration information configured by other base stations and the Application ID or the Group ID of each UE served by the other base stations.

s1002: and the base station serving the first UE transmits the corresponding relation to the first UE.

s1003: after receiving the corresponding relation issued by a base station serving the first UE, the first UE determines DRX configuration information of the second UE according to the corresponding relation and Application ID or Group ID of the second UE;

s1004: the first UE determines the time of the second UE in the active state according to the DRX period, the DRX starting offset drxStartOffset and the duration of the active state in each DRX period which are included in the DRX configuration information of the second UE;

S1005: and the first UE sends signals to the second UE within the time when the second UE is in the activated state.

in the specific implementation process, the corresponding relationship between the DRX configuration information and the Application ID or GroupID may also be predefined in the protocol; when the first UE needs to communicate with the second UE, the first UE may directly determine the DRX configuration information of the second UE according to the correspondence, and send a signal according to the determined DRX configuration information of the second UE.

as shown in fig. 11, a flowchart of a signal transmission method in D2D communication according to a seventh embodiment of the present invention includes the following steps.

s1101: the method comprises the steps that a first UE determines DRX configuration information of a second UE according to a preset corresponding relation between the DRX configuration information and an Application identifier (Application ID) or a Group identifier (Group ID) of the UE;

S1102: and 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, the embodiment of the present invention further provides a signal transmission apparatus in D2D communication corresponding to the signal transmission method in D2D communication, and as the principle of the apparatus for solving the problem is similar to the signal transmission method in D2D communication in the embodiment of the present invention, the implementation of the apparatus may refer to the implementation of the method, and repeated details are not described again.

As shown in fig. 12, a schematic structural diagram of a signal transmission device in D2D communication according to an eighth embodiment of the present invention includes:

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

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

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

Optionally, the obtaining module 121 is specifically configured to:

Optionally, the sending module 123 is specifically configured to:

optionally, the determining module 122 is specifically configured to:

As shown in fig. 13, a schematic structural diagram of a signal transmission device in D2D communication according to a ninth embodiment of the present invention includes:

A receiving module 131, 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 132, configured to send DRX configuration information of the second UE to the first UE according to the request message received by the receiving module 131, where the DRX configuration 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.

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

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

as shown in fig. 14, a schematic structural diagram of a signal transmission device in D2D communication according to a tenth embodiment of the present invention includes:

A determining module 141, configured to determine a corresponding relationship between the DRX configuration information and an Application identifier Application ID or a Group identifier Group ID of the UE;

A sending module 142, configured to send the corresponding relationship determined by the determining module 141 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.

optionally, the determining module 141 is specifically configured to:

optionally, the apparatus further comprises:

A receiving module 143, configured to receive request information for obtaining the corresponding relationship sent by the first UE before the sending module issues the corresponding relationship to the served first UE.

As shown in fig. 15, a schematic structural diagram of a signal transmission device in D2D communication according to an eleventh embodiment of the present invention includes:

a receiver 151, configured to obtain, for a first user equipment UE, continuous reception cycle DRX configuration information of a second UE;

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

a transmitter 153, configured to transmit a signal to the second UE based on the D2D communication manner during the time that the processor 152 determines that the second UE is in the active state.

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

The receiver 151 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.

Optionally, the receiver 151 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; 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;

optionally, the transmitter 153 is specifically configured to:

Optionally, the processor 152 is specifically configured to:

as shown in fig. 16, a schematic structural diagram of a signal transmission device in D2D communication according to a twelfth embodiment of the present invention includes:

a receiver 161, 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 162, configured to send 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 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.

optionally, the transmitter 162 is further configured to transmit, to a base station serving the second UE, a request message for acquiring DRX configuration information of the second UE before transmitting the DRX configuration information of the second UE to the first UE;

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

as shown in fig. 17, a schematic structural diagram of a signal transmission device in D2D communication according to a thirteenth embodiment of the present invention includes:

The processor 171 is configured to determine a correspondence between the DRX configuration information and an Application identifier (Application ID) or a Group identifier (Group ID) of the UE;

a transmitter 172, configured to send the correspondence determined by the processor 171 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.

Optionally, the processor 171 is specifically configured to:

Optionally, the apparatus further comprises:

The receiver 173 is configured to receive request information for obtaining the corresponding relationship sent by the first UE before the sender issues the corresponding relationship to the served first UE.

as will be appreciated by one skilled in the art, embodiments of the present invention may 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 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, and the like) 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 will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

these computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

while preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention.

it will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.

Claims

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 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:

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

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

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

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;

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

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

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

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;

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

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

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:

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

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

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

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:

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

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

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:

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;

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:

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: