WO2016045442A1 - Method, device, and system for device-to-device communication - Google Patents

Abstract

Disclosed are a method, device, and system for device-to-device (D2D) communication. The method comprises: receiving a D2D first resource configuration message from a network node, determining a D2D resource set on the basis of the first resource configuration message, and, transmitting a D2D signal in the resource set, where the resource set is cyclically distributed, and each resource cycle comprises multiple resource units divided by means of time-division multiplexing and/or frequency-division multiplexing.

Description

Device-to-device communication method, device and system Technical field

The present invention relates to a device-to-device (D2D) communication technology in the field of mobile communications, and in particular, to a D2D communication method, apparatus, and system.

Background technique

In a cellular communication system, when there is traffic transmission between two user equipments (UE, User Equipment), when UE1 and UE2 are located in the same cell and are close to each other, although two UEs are covered by the cell of the same base station The data transmission still needs to be transited through the core network, and one data transmission still consumes the wireless spectrum resources on the two links. It can be seen that the above cellular communication method is obviously not optimal. With the diversification of mobile communication services, for example, the popularity of applications such as social networks and electronic payment in wireless communication systems, the demand for service transmission between close-range users is increasing. The communication mode of device-to-device (D2D) has received increasing attention. For users of short-range communication, D2D not only saves wireless spectrum resources, but also reduces the data transmission pressure of the core network.

In cellular communication, when two UEs communicate, in general, the UE does not know the location of the other party's UE, but establishes a connection between the two UEs through the network side device (base station or core network device). For D2D communication, the premise of establishing a communication link is mutual discovery between UEs, that is, the UE has a neighbor relationship. One way to implement device discovery is through the discovery and detection of device discovery signals. The performance discovered by the device is related to the load of the device discovery signal. For example, when the load of the device discovery signal is large, how to ensure or improve the performance of the device discovery is an urgent problem to be solved in the related art. In addition, in the device-to-device communication process, the terminal needs to transmit control signaling (also referred to as scheduling assignment) to indicate the relevant data channel. And the control signaling is sent in the same way. Issues to consider in the technology.

Summary of the invention

To solve the above technical problems, the present invention provides a D2D communication method, apparatus and system.

An embodiment of the present invention provides a D2D communication method, where the method includes:

Receiving a D2D first resource configuration message from a network node;

Determining a D2D resource set according to the first resource configuration message;

Transmitting the device to the D2D signal within the set of resources;

The resource set is a periodic distribution, and each resource period includes multiple resource units divided by time division multiplexing and/or frequency division multiplexing.

In the above solution, the method further includes:

Determining, from the set of resources, a location of a dedicated resource unit for transmitting a D2D signal, and transmitting the D2D signal in the dedicated resource unit;

The dedicated resource unit includes a plurality of resource units discretely distributed in a time domain and/or a frequency domain according to a preset rule;

The manner of the discrete distribution includes at least one of the following:

The frequency locations of the plurality of resource units are not continuous;

The time positions of the plurality of resource units are not continuous;

The frequency locations and time locations of the plurality of resource units are discontinuous.

In the above solution, determining a location of a dedicated resource unit for transmitting the D2D signal includes:

Determining a location of a virtual resource for transmitting the D2D signal, and determining a location of a dedicated resource unit for transmitting the D2D signal based on a location of the virtual resource.

In the above solution, determining a virtual resource location for transmitting the D2D signal includes:

Selecting, from the virtual resource candidate set, a location of the virtual resource unit;

Or,

Receiving a D2D second resource configuration message from the network node, wherein the second resource configuration message is at least used to indicate a location of the virtual resource.

In the above solution, determining a location of a dedicated resource unit for transmitting the D2D signal includes:

Determining a location of a specific one of the plurality of resource units for transmitting the D2D signal, and determining, among the plurality of resource units for transmitting the D2D signal, according to the location of the specific resource unit and the preset rule The location of the resource unit, the location of the particular resource unit and the location of the other resource unit as the location of the dedicated resource.

In the above solution, determining a location of a specific resource unit of the multiple resource units used for transmitting the D2D signal includes:

Randomly selecting a location of the specific resource unit in a resource unit candidate set;

or,

Receiving a device-to-device second resource configuration message from the network node, the second resource configuration message being used at least to indicate a location of the particular resource unit.

In the foregoing solution, the preset rule is: a frequency domain location interval of two adjacent resource units of the multiple resource units for transmitting the D2D signal is K/2; or, for transmitting the D2D The frequency domain location interval of two adjacent resource units of the plurality of resource units of the signal is K/m;

The K is the number of frequency domain available resource units used for the device-to-device communication, and m is the number of resource units used to transmit the D2D signal in the resource period.

In the above solution, the preset rule is: a time domain location interval of two adjacent ones of the plurality of resource units for transmitting the D2D signal is L/2;

Or the time domain location interval of two adjacent resource units in the multiple resource units for transmitting the D2D signal is L/n;

Or, two adjacent resource lists of the plurality of resource units for transmitting the D2D signal The time domain location interval of the element is L1/2;

Or the time domain location interval of two adjacent resource units in the multiple resource units for transmitting the D2D signal is L1/n;

The L is a number of time domain available resource units in a resource period for the device-to-device communication, and L1 is a time domain available resource for each resource group in the resource period of the device-to-device communication. The number of cells, n is the number of dedicated resource units for the D2D signal transmission within one resource period.

In the above solution, the method further includes:

Allocating resource units in the resource period in a time domain according to the number of the dedicated resource units in one resource period, such that the number of time domain available resource units in each resource unit group, and the D2D are used for The number of the dedicated resource units for signal transmission is the same;

The resource unit is for D2D signal transmission; the D2D signal is transmitted within one of the resource packets.

In the above solution, the method further includes:

Determining, according to a location (1, k) of the specific resource unit and the preset rule, a location of another resource unit of the plurality of resource units for transmitting the D2D signal;

The specific resource unit is a first resource unit that transmits the D2D signal in the resource period;

The preset rule is: a time position of the ith resource unit that transmits the D2D signal is mod(l+(i-1)*L/m, L), or mod(l+(i-1)*L1/ m, L1), or l, or l+i-1;

And/or, the frequency position of the i-th resource unit transmitting the D2D signal is mod(k+(i-1)*K/m, K), or mod(k+mod(i-1, 2)*K /2, K), or k;

Where i is a positive integer less than or equal to m.

In the above solution, the D2D signal is a discovery signal for device discovery, or a bearer transmission The physical channel of the signal; or,

The D2D signal is control signaling for device communication, or scheduling allocation information or a physical channel carrying the control signaling or information.

In the above solution, the resource unit in the resource period includes multiple resource groups in the time domain;

Each of the resource packets includes a time domain contiguous subframe for transmission of the device to device communication signal;

Each of the resource packets is discretely distributed and within one resource period, the number of subframes in different resource packets is the same.

In the above solution, the manner of determining the number of consecutive subframes in the time domain includes at least one of the following:

The number of consecutive subframes is not greater than a length of an uplink semi-persistent scheduling interval, and the semi-persistent scheduling interval is a minimum value of a semi-persistent scheduling interval allowed by the cellular communication system;

The number of consecutive subframes is not greater than the round trip time of the uplink hybrid automatic repeat request;

The number of consecutive subframes is not greater than the number of consecutive uplink subframes in the uplink and downlink configuration 0 of the subframe of the time division duplex cellular communication system;

The number of consecutive subframes is not greater than the number of consecutive uplink subframes in the uplink and downlink configuration 3 of the subframe of the time division duplex cellular communication system;

The number of consecutive subframes is not greater than the number of consecutive uplink subframes in the uplink and downlink configuration of the subframe configured by the time division duplex cellular communication system.

The real-time example of the present invention also provides a D2D communication method, the method comprising:

Generating a D2D first resource configuration message;

And sending the D2D first resource configuration message to the D2D user equipment UE; the first resource configuration message is used to allocate at least a D2D resource set, where the resource set is used for signal transmission of the device to device communication;

The resource set is periodically distributed, and each resource cycle includes time division multiplexing. And/or a plurality of resource units divided by frequency division multiplexing; the resource set is used by the D2D user equipment to transmit the D2D signal.

In the foregoing solution, the method further includes: sending a D2D second resource configuration message;

The second resource configuration message includes: indicating a location of a specific resource unit of the plurality of resource units that transmit the D2D signal; or indicating a location of the virtual resource, where the location of the virtual resource is used to transmit the D2D A plurality of resource units of the signal have a preset mapping relationship.

In the above solution, the second resource configuration message includes: a time domain resource indication parameter and a frequency domain resource indication parameter;

The time domain resource indication parameter is used to indicate to the user equipment a time domain location of a specific resource unit of the plurality of resource units that transmit the D2D signal in a resource period;

The frequency domain resource indication parameter is used to indicate to a user equipment, a frequency domain location of a specific resource unit of the plurality of resource units that transmit the D2D signal in a resource period;

The frequency domain resource indication parameter is indicated by an index or a bitmap;

The time domain resource indication parameter is indicated by an index, and the maximum value of the index is Kt-1 or Kt/m-1 or Kt or Kt/m;

Where Kt is the total number of available resource units in the time domain D2D in the resource period or the maximum number of available D2D resource units allowed in the resource period, and m is the number of D2D resource units occupied by the D2D signal in one resource period.

An embodiment of the present invention provides a D2D communication method, where the method includes:

Receiving a configuration message of the D2D resource from the network node;

Determining a resource set for the D2D communication according to the configuration message;

Detecting a D2D signal in the set of resources;

The configuration message is at least used to indicate a resource set for detecting the D2D signal, where the resource set is periodically distributed, and each resource period includes time division multiplexing and/or frequency division multiplexing. And dividing a plurality of resource units; correspondingly, in one resource period, the D2D signal is transmitted in multiple resource units, and the plurality of resource units are discrete in a time domain and/or a frequency domain according to a preset rule. distributed.

In the above solution, the frequency domain discretely distributed is that the frequency positions occupied by the multiple resource units are discontinuous;

The time domain discrete distribution is that the time domain location occupied by the multiple resource units is discontinuous;

The frequency domain and the time domain discrete distribution are discontinuous for the frequency domain location and the time location occupied by the multiple resource units.

In the foregoing solution, the preset rule is: a frequency domain location interval of two adjacent resource units of the multiple resource units for transmitting the D2D signal is K/2; or, for transmitting the D2D The frequency domain location interval of two adjacent resource units of the plurality of resource units of the signal is K/m;

The K is the number of frequency domain available resource units used for the device-to-device communication, and m is the number of resource units used to transmit the D2D signal in the resource period.

In the above solution, the preset rule is: a time domain location interval of two adjacent ones of the plurality of resource units for transmitting the D2D signal is L/2;

Or the time domain location interval of two adjacent resource units in the multiple resource units for transmitting the D2D signal is L/n;

Or the time domain location interval of two adjacent resource units in the plurality of resource units for transmitting the D2D signal is L1/2;

Or the time domain location interval of two adjacent resource units in the multiple resource units for transmitting the D2D signal is L1/n;

The L is a number of time domain available resource units in a resource period for the device-to-device communication, and L1 is a time domain available resource for each resource group in the resource period of the device-to-device communication. The number of units, n is a resource period for the D2D signal transmission The number of dedicated resource units that are lost.

In the above solution, the resource units in the resource period are grouped in the time domain according to the number of the dedicated resource units in one resource period, and the number of available time unit resources in each resource group is used for the The number of the dedicated resource units for D2D signal transmission is the same;

The resource unit is for D2D signal transmission.

In the above solution, determining a location of a specific resource unit among the plurality of resource units for transmitting the D2D signal;

Determining, according to a location of the specific resource unit and the preset rule, a location of another resource unit of the plurality of resource units for transmitting the D2D signal;

Detecting the D2D signal in the particular resource resource and the other resource unit.

In the above solution, determining, according to the location (1, k) of the specific resource unit and the preset rule, a location of another resource unit in the multiple resource units for transmitting the D2D signal, where the specific resource unit is Transmitting, by the resource period, a first resource unit of the D2D signal;

The preset rule is: a time position of the ith resource unit that transmits the D2D signal is mod(l+(i-1)*L/m, L), or mod(l+(i-1)*L1/ m, L1), or l, or l+i-1;

and / or,

The frequency position of the i-th resource unit transmitting the D2D signal is mod(k+(i-1)*K/m, K), or mod(k+mod(i-1, 2)*K/2, K ), or k;

Where i is a positive integer less than or equal to m.

The embodiment of the invention provides a user equipment, including:

a first communication unit, configured to receive a D2D first resource configuration message from the network node;

a baseband processing unit, configured to determine a D2D resource set according to the first resource configuration message;

a second communication unit, configured to send the device-to-device communication signal in the D2D resource set;

The resource set is used for signal transmission of the device-to-device communication; the resource set is periodically distributed, and each resource cycle includes multiples divided by time division multiplexing and/or frequency division multiplexing. Resource unit.

In the above solution, the second communication unit is configured to send the D2D signal in the dedicated resource unit;

Correspondingly, the baseband processing unit is further configured to determine, from the resource set, a location of a dedicated resource unit for transmitting a D2D signal;

The dedicated resource unit is a plurality of resource units discretely distributed in a time domain and/or a frequency domain according to a preset rule;

The manner of the discrete distribution includes at least one of the following:

The frequency locations of the plurality of resource units are not continuous;

The time positions of the plurality of resource units are not continuous;

The frequency locations and time locations of the plurality of resource units are discontinuous.

In the above solution, the baseband processing unit is configured to determine a location of a virtual resource for transmitting the D2D signal, and determine, according to a location of the virtual resource, a location of a plurality of resource units for transmitting the D2D signal as The location of the dedicated resource unit.

In the above solution, the baseband processing unit is configured to randomly select a location of the virtual resource unit from a virtual resource candidate set;

or,

Receiving, by the first communication unit, a D2D second resource configuration message from the network node, wherein the second resource configuration message is at least used to indicate a location of the virtual resource.

In the above solution, the baseband processing unit is configured to determine a location of a specific resource unit of the plurality of resource units for transmitting the D2D signal, and determine, according to the location of the specific resource unit and the preset rule, Transmitting a location of other resource units of the plurality of resource units of the D2D signal, a location of the specific resource unit, and a location of the other resource unit As the location of the dedicated resource.

In the above solution, the baseband processing unit is configured to randomly select a location of the specific resource unit from a resource element candidate set;

or,

Receiving, by the first communication unit, a device-to-device second resource configuration message from the network node, the second resource configuration message being used at least to indicate a location of the particular resource unit.

In the foregoing solution, the preset rule is: a frequency domain location interval of two adjacent resource units of the multiple resource units for transmitting the D2D signal is K/2; or, for transmitting the D2D The frequency domain location interval of two adjacent resource units of the plurality of resource units of the signal is K/m;

The K is the number of frequency domain available resource units used for the device-to-device communication, and m is the number of resource units used to transmit the D2D signal in the resource period.

In the above solution, the preset rule is: a time domain location interval of two adjacent ones of the plurality of resource units for transmitting the D2D signal is L/2;

Or the time domain location interval of two adjacent resource units in the multiple resource units for transmitting the D2D signal is L/n;

Or the time domain location interval of two adjacent resource units in the plurality of resource units for transmitting the D2D signal is L1/2;

Or the time domain location interval of two adjacent resource units in the multiple resource units for transmitting the D2D signal is L1/n;

The L is a number of time domain available resource units in a resource period for the device-to-device communication, and L1 is a time domain available resource for each resource group in the resource period of the device-to-device communication. The number of cells, n is the number of dedicated resource units for the D2D signal transmission within one resource period.

In the above solution, the baseband processing unit is further configured to perform according to a resource period. The number of dedicated resource units is grouped in the time domain for resource units within the resource period such that the number of time domain available resource units within each resource unit packet, and the dedicated resource unit for the D2D signal transmission The same number;

The resource unit is for D2D signal transmission; the D2D signal is transmitted within one of the resource packets.

In the above solution, the baseband processing unit is further configured to determine, according to the location (1, k) of the specific resource unit, and the preset rule, other resource units in the multiple resource units for transmitting the D2D signal. s position;

The specific resource unit is a first resource unit that transmits the D2D signal in the resource period;

The preset rule is: a time position of the ith resource unit that transmits the D2D signal is mod(l+(i-1)*L/m, L), or mod(l+(i-1)*L1/ m, L1), or l, or l+i-1;

And/or, the frequency position of the i-th resource unit transmitting the D2D signal is mod(k+(i-1)*K/m, K), or mod(k+mod(i-1, 2)*K /2, K), or k;

Where i is a positive integer less than or equal to m.

In the above solution, the D2D signal is a discovery signal used for device discovery or a physical channel carrying a discovery signal; or

The D2D signal is control signaling for device communication, or a signal for scheduling allocation information transmission or a physical channel carrying the signal.

In the above solution, the resource unit in the resource period includes multiple resource groups in the time domain;

Each of the resource packets includes a time domain contiguous subframe for transmission of the device to device communication signal;

Each of the resource packets is discretely distributed and within one resource period, the number of subframes in different resource packets is the same.

In the above solution, the manner of determining the number of consecutive subframes in the time domain includes at least one of the following:

The number of consecutive subframes is not greater than a length of an uplink semi-persistent scheduling interval, and the semi-persistent scheduling interval is a minimum value of a semi-persistent scheduling interval allowed by the cellular communication system;

The number of consecutive subframes is not greater than the round trip time of the uplink hybrid automatic repeat request;

The number of consecutive subframes is not greater than the number of consecutive uplink subframes in the uplink and downlink configuration 0 of the subframe of the time division duplex cellular communication system;

The number of consecutive subframes is not greater than the number of consecutive uplink subframes in the uplink and downlink configuration 3 of the subframe of the time division duplex cellular communication system;

The number of consecutive subframes is not greater than the number of consecutive uplink subframes in the uplink and downlink configuration of the subframe configured by the time division duplex cellular communication system.

The embodiment of the invention provides a network node, including:

a configuration module, configured to generate a D2D first resource configuration message, where the first resource configuration message is used to allocate at least a D2D resource set, where the resource set is used for signal transmission of the device-to-device communication; For periodic distribution, each resource period includes multiple resource units divided by time division multiplexing and/or frequency division multiplexing; the resource set is used by the D2D user equipment to send a D2D signal;

And a sending module, configured to send the D2D first resource configuration message to the D2D user equipment UE.

In the above solution, the sending module is further configured to send a D2D second resource configuration message.

The second resource configuration message includes a location indicating a first resource unit of a plurality of resource units that transmit the D2D signal; or indicates a location of the virtual resource, where the location of the virtual resource is used to transmit the A plurality of resource units of the D2D signal have a preset mapping relationship between them.

In the above solution, the second resource configuration message includes: a time domain resource indication parameter and a frequency domain resource indication parameter;

The time domain resource indication parameter is used to indicate to the user equipment a time domain location of a specific resource unit of the plurality of resource units that transmit the D2D signal in a resource period;

The frequency domain resource indication parameter is used to indicate to a user equipment, a frequency domain location of a specific resource unit of the plurality of resource units that transmit the D2D signal in a resource period;

The frequency domain resource indication parameter is indicated by an index or a bitmap;

The time domain resource indication parameter is indicated by an index, and the maximum value of the index is Kt-1 or Kt/m-1 or Kt or Kt/m;

Where Kt is the total number of available resource units in the time domain D2D in the resource period or the maximum number of available D2D resource units allowed in the resource period, and m is the number of D2D resource units occupied by the D2D signal in one resource period.

The embodiment of the invention provides a user equipment, including:

a first communication module, configured to receive a configuration message of the D2D resource from the network node, where the configuration message at least includes: indicating a resource set for detecting the D2D signal, where the resource set is a periodic distribution, each The resource period includes a plurality of resource units divided by time division multiplexing and/or frequency division multiplexing; correspondingly, in one resource period, the D2D signal is transmitted in multiple resource units, and the multiple The resource unit is discretely distributed in the time domain and/or the frequency domain according to a preset rule;

a baseband processing module, configured to determine, according to the configuration message, a resource set for the D2D communication;

a second communication module, configured to detect a D2D signal in the set of resources.

In the above solution, the frequency domain discretely distributed is that the frequency positions occupied by the multiple resource units are discontinuous;

The time domain discrete distribution is that the time domain location occupied by the multiple resource units is discontinuous;

The frequency domain and the time domain discrete distribution are discontinuous for the frequency domain location and the time location occupied by the multiple resource units.

In the foregoing solution, the preset rule is: a frequency domain location interval of a resource unit for transmitting the D2D signal is K/2; or a frequency domain location interval of multiple resource units used for transmitting the D2D signal. Is K/m;

The K is the number of frequency domain available resource units used for device-to-device communication, and m is the number of resource units used to transmit the D2D signal in one resource period.

In the above solution, the preset rule is: a time domain location interval of multiple resource units for transmitting the D2D signal is L/2;

Or the time domain location interval of the multiple resource units used for transmitting the D2D signal is L/n;

Or the time domain location interval of the multiple resource units for transmitting the D2D signal is L1/2;

Or the time domain location interval of the multiple resource units used for transmitting the D2D signal is L1/n;

The L is the number of time domain available resource units in a resource period for device-to-device communication, and L1 is the number of time domain available resource units for each resource group in a resource period for device-to-device communication. , n is the number of resource elements used for the D2D signal transmission in one resource period.

In the above solution, the baseband processing module is configured to group resource units in the resource period in a time domain according to the number of the dedicated resource units in one resource period, and use a time domain available resource unit in each resource group. The number is the same as the number of dedicated resource units used for the D2D signal transmission; the resource unit is for D2D signal transmission.

In the above solution, the baseband processing module is configured to determine a location of a specific resource unit of the plurality of resource units for transmitting the D2D signal, and determine, according to the location of the specific resource unit and the preset rule, Transmitting a location of other resource units of the plurality of resource units of the D2D signal; detecting the D2D in the specific resource resource and the other resource unit signal.

In the above solution, the baseband processing module is configured to determine, according to the location (1, k) of the specific resource unit and the preset rule, another resource unit of the plurality of resource units for transmitting the D2D signal. Position, the specific resource unit is a first resource unit that transmits the D2D signal in the resource period;

The preset rule is: a time position of the ith resource unit that transmits the D2D signal is mod(l+(i-1)*L/m, L), or mod(l+(i-1)*L1/ m, L1), or l, or l+i-1;

and / or,

The frequency position of the i-th resource unit transmitting the D2D signal is mod(k+(i-1)*K/m, K), or mod(k+mod(i-1, 2)*K/2, K ), or k;

Where i is a positive integer less than or equal to m.

An embodiment of the present invention provides a device-to-device communication system, where the system includes:

a user equipment, configured to receive a D2D first resource configuration message from the network node, and determine, according to the first resource configuration message, a resource for transmitting the D2D signal;

And a network node, configured to generate a D2D first resource configuration message, and send the D2D first resource configuration message to the D2D user equipment.

The D2D communication method, device and system provided by the present invention can determine the resource for transmitting the discovery signal according to the configuration message sent by the network node, thereby transmitting the D2D discovery signal on the resource, so that the device-to-device can be solved. The device discovers the transmission problem of the signal and the control signaling during communication, and the method described herein can obtain the frequency diversity and/or the time diversity gain of the device-to-device signal without increasing the complexity and signaling overhead of the terminal, thereby The transmission performance of the signal or the signaling is obviously improved. On the other hand, in the method provided by the present invention, by grouping the resource collections in the device-to-device resource cycle, it is ensured that resources are allocated for device-to-device communication while ensuring D2D communication is compatible with cellular link uplink communication.

DRAWINGS

1 is a schematic flowchart 1 of a device-to-device communication method according to an embodiment of the present invention;

2 is a second schematic flowchart of a device-to-device communication method according to an embodiment of the present invention;

3 is a schematic flowchart 3 of a device-to-device communication method according to an embodiment of the present invention;

4 is a schematic diagram showing a division structure of communication resources;

5 is a schematic diagram of network deployment of a cellular wireless communication system;

6 is an example 1 of a D2D resource configuration;

7 is an example 2 of a D2D resource configuration;

8 is an example 3 of a D2D resource configuration;

9 is an example 4 of a D2D resource configuration;

10 is an example 5 of a D2D resource configuration;

11 is an example 6 of a D2D resource configuration;

12 is an example 7 of a D2D resource configuration;

FIG. 13 is an example 8 of a D2D resource configuration;

14 is an example 9 of a D2D resource configuration;

15 is an example 10 of a D2D resource configuration;

16 is an example 11 of a D2D resource configuration;

17 is an example 12 of a D2D resource configuration;

18 is an example thirteen of a D2D resource configuration;

FIG. 19 is a schematic structural diagram of a system according to an embodiment of the present invention;

FIG. 20 is a schematic structural diagram of a network node according to an embodiment of the present disclosure;

FIG. 21 is a schematic structural diagram of a user equipment according to an embodiment of the present invention.

detailed description

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

Method Embodiment 1

This embodiment provides a device-to-device communication method, as shown in FIG. 1 , including:

Step 101: Receive a D2D first resource configuration message from a network node.

Step 102: Determine a D2D resource set according to the first resource configuration message.

Step 103: Send the device to the D2D signal within the resource set.

The step 103 may specifically be determining, from the resource set, a location of a dedicated resource unit for transmitting a D2D signal, and transmitting the D2D signal in the dedicated resource unit.

Here, the resource set is used for signal transmission of the device-to-device communication; the resource set is periodically distributed, and each resource cycle includes multiples divided by time division multiplexing and/or frequency division multiplexing. Resource unit.

The dedicated resource unit includes a plurality of resource units discretely distributed in a time domain and/or a frequency domain according to a preset rule;

The manner of the discrete distribution includes at least one of the following:

The frequency locations of the plurality of resource units are not continuous;

The time positions of the plurality of resource units are not continuous;

The frequency locations and time locations of the plurality of resource units are discontinuous.

Preferably, determining the location of the dedicated resource unit for transmitting the D2D signal may include: determining a location of a virtual resource for transmitting the D2D signal, and determining, according to a location of the virtual resource, The location of the plurality of resource elements of the D2D signal is taken as the location of the dedicated resource unit.

The determining, by the determining, the virtual resource location for transmitting the D2D signal, includes:

Selecting, from the virtual resource candidate set, a location of the virtual resource unit; or receiving a D2D second resource configuration message from the network node, where the second resource configuration message is at least used to indicate a location of the virtual resource .

The virtual resource candidate set corresponds to a device-to-device communication resource in one resource period in the resource set; or one in a resource cycle in the resource set. Device-to-device communication resources in a resource group.

Preferably, determining the location of the dedicated resource unit for transmitting the D2D signal may include: determining a location of a specific resource unit of the plurality of resource units for transmitting the D2D signal, and according to the specific resource unit a location and the preset rule determine a location of another resource unit of the plurality of resource units for transmitting the D2D signal, and a location of the specific resource unit and a location of the other resource unit as the dedicated resource position.

Determining, by the network node, a location of the specific resource unit of the plurality of resource units for transmitting the D2D signal, including: randomly selecting a location of the specific resource unit in the resource unit candidate set; or receiving a device to the device from the network node And a second resource configuration message, where the second resource configuration message is at least used to indicate a location of the specific resource unit.

The resource unit candidate set is a device-to-device communication resource in one resource period in the resource set; or a device-to-device resource in a resource group in one resource period in the resource set.

Preferably, the preset rule may be: a frequency domain location interval of two adjacent ones of the plurality of resource units for transmitting the D2D signal is K/2; or, for transmitting the D2D The frequency domain location interval of two adjacent resource units in the plurality of resource units of the signal is K/m; wherein the K is the number of available frequency domain resource units for device-to-device communication, and m is one The number of resource elements used to transmit the D2D signal during the resource period.

Preferably, the preset rule may further be: a time domain location interval of adjacent two resource units of the plurality of resource units for transmitting the D2D signal is L/2;

Or the time domain location interval of two adjacent resource units in the multiple resource units for transmitting the D2D signal is L/n;

Or the time domain location interval of two adjacent resource units in the plurality of resource units for transmitting the D2D signal is L1/2;

Or, two adjacent resource lists of the plurality of resource units for transmitting the D2D signal The time domain location interval of the element is L1/n;

The L is the number of time domain available resource units in a resource period for device-to-device communication, and L1 is the number of time domain available resource units for each resource group in a resource period for device-to-device communication. , n is the number of resource elements used for the D2D signal transmission in one resource period.

The D2D signal is a discovery signal for device discovery or a physical channel carrying a discovery signal; or the D2D signal is control signaling for device communication, or scheduling allocation information or carrying the control signaling or information. Physical channel.

The preset mapping manner is: randomly selecting a location of the specific resource unit or a location of the virtual resource unit; or receiving a device-to-device second resource configuration message, determining according to the indication of the second resource configuration message The location of the particular resource unit or the location of the virtual resource.

A resource unit within the resource period includes a plurality of resource packets in a time domain; each of the resource packets includes a time domain contiguous subframe for transmission of the device-to-device communication signal;

Each of the resource packets is discretely distributed and within one resource period, the number of subframes in different resource packets is the same.

The manner of determining the number of consecutive subframes in the time domain includes at least one of the following:

The number of consecutive subframes is not greater than a length of an uplink semi-persistent scheduling interval, and the semi-persistent scheduling interval is a minimum value of a semi-persistent scheduling interval allowed by the cellular communication system;

The number of consecutive subframes is not greater than the round trip time of the uplink hybrid automatic repeat request;

The number of consecutive subframes is not greater than the number of consecutive uplink subframes in the uplink and downlink configuration 0 of the subframe of the time division duplex cellular communication system;

The number of consecutive subframes is not greater than the number of consecutive uplink subframes in the uplink and downlink configuration 3 of the subframe of the time division duplex cellular communication system;

The number of consecutive subframes is not greater than the subframes configured by the time division duplex cellular communication system The number of consecutive uplink subframes in the row configuration.

Preferably, the foregoing method for grouping the resource units may include: grouping resource units in the resource period in a time domain according to the number of the dedicated resource units used for the D2D signal transmission in one resource period. The number of time domain available resource elements within each resource packet is the same as the number of said dedicated resource elements for said D2D signal transmission; said D2D signals are transmitted within one of said resource packets. The resource unit is for D2D signal transmission; the D2D signal is transmitted within one of the resource packets.

The method further includes determining a location of another resource unit of the plurality of resource units for transmitting the D2D signal according to the location (1, k) of the specific resource unit and the preset rule; a specific resource unit is a first resource unit that transmits the D2D signal in the resource period;

The preset rule is: a time position of the ith resource unit that transmits the D2D signal is mod(l+(i-1)*L/m, L), or mod(l+(i-1)*L1/ m, L1), or l, or l+i-1;

And/or, the frequency position of the i-th resource unit transmitting the D2D signal is mod(k+(i-1)*K/m, K), or mod(k+mod(i-1, 2)*K /2, K), or k; where i is a positive integer less than or equal to m.

It should be noted that the "first" in the "first resource unit" mentioned here is a logical concept, just to facilitate the description of the scheme. In theory, any resource unit that transmits the D2D signal can be the "first resource unit."

Method embodiment 2

This embodiment provides a device-to-device communication method, as shown in FIG. 2, including:

Step 201: Generate a D2D first resource configuration message.

Step 202: Send the D2D first resource configuration message to a D2D user equipment (UE), where the first resource configuration message is used to allocate at least a D2D resource set, where the resource set is used. Signal transmission of the device to device communication. The resource set is a periodic distribution, and each resource period includes multiple resource units divided by time division multiplexing and/or frequency division multiplexing. The resource set is used by the D2D user equipment to send a D2D signal.

The resource set is used by the D2D user equipment to transmit the D2D signal, including: the D2D user equipment determines, from the resource set, a location of a dedicated resource unit for transmitting the D2D signal, and sends the D2D in the dedicated resource unit. signal;

Wherein, the manner of the discrete distribution includes at least one of the following:

The frequency locations of the plurality of resource units are not continuous;

The time positions of the plurality of resource units are not continuous;

The frequency locations and time locations of the plurality of resource units are discontinuous.

Preferably, the preset rule may be: a frequency domain location interval of two adjacent ones of the plurality of resource units for transmitting the D2D signal is K/2; or, for transmitting the D2D The frequency domain location interval of two adjacent resource units of the plurality of resource units of the signal is K/m;

The K is the number of frequency domain available resource units used for device-to-device communication, and m is the number of resource units used to transmit the D2D signal in one resource period.

Preferably, the preset rule may further be: a time domain location interval of adjacent two resource units of the plurality of resource units for transmitting the D2D signal is L/2;

Or the time domain location interval of two adjacent resource units in the multiple resource units for transmitting the D2D signal is L/n;

Or the time domain location interval of two adjacent resource units in the plurality of resource units for transmitting the D2D signal is L1/2;

Or the time domain location interval of two adjacent resource units in the multiple resource units for transmitting the D2D signal is L1/n;

Wherein, the L is a time domain available resource list in a resource period for device-to-device communication The number of elements, L1 is the number of time domain available resource units for each resource group in the resource period for device-to-device communication, and n is the number of resource units for the D2D signal transmission in one resource period.

Preferably, the method may further include: transmitting a D2D second resource configuration message, while performing step 201-step 202, or before or after performing step 202;

The second resource configuration message includes a location indicating a specific resource unit of the plurality of resource units of the plurality of resource units that transmit the D2D signal; or indicating a location of the virtual resource, where the location of the virtual resource is used for transmission A plurality of resource units of the D2D signal have a preset mapping relationship between them.

Preferably, the second resource configuration message may further include: a time domain resource indication parameter and a frequency domain resource indication parameter;

The time domain resource indication parameter is used to indicate to the user equipment a time domain location of a specific resource unit of the plurality of resource units that transmit the D2D signal in a resource period;

The frequency domain resource indication parameter is used to indicate to a user equipment a time domain location of a specific resource unit of the plurality of resource units that transmit the D2D signal in a resource period;

The frequency domain resource indication parameter is indicated by an index or a bitmap;

The time domain resource indication parameter is indicated by an index, and the maximum value of the index is Kt-1 or Kt/m-1 or Kt or Kt/m-1;

Where Kt is the total number of available resource units in the time domain D2D in the resource period or the maximum number of available D2D resource units allowed in the resource period, and m is the number of D2D resource units occupied by the D2D signal in one resource period.

For the index, you can take a value from 0 or start with a value of 1. For example, when the index maximum value is Kt-1 or Kt/m-1, the value is taken from 0; when the index maximum value is Kt or Kt/m-1, the value is taken from 1.

The resource unit in the resource period includes a plurality of resource groups in the time domain;

Each of the resource packets includes a time domain contiguous subframe for transmission of the device to device communication signal;

Each of the resource packets is discretely distributed and within one resource period, the number of subframes in different resource packets is the same.

The manner of determining the number of consecutive subframes in the time domain includes at least one of the following:

The number of consecutive subframes is not greater than a length of an uplink semi-persistent scheduling interval, and the semi-persistent scheduling interval is a minimum value of a semi-persistent scheduling interval allowed by the cellular communication system;

The number of consecutive subframes is not greater than the round trip time of the uplink hybrid automatic repeat request;

The number of consecutive subframes is not greater than the number of consecutive uplink subframes in the uplink and downlink configuration 0 of the subframe of the time division duplex cellular communication system;

The number of consecutive subframes is not greater than the number of consecutive uplink subframes in the uplink and downlink configuration 3 of the subframe of the time division duplex cellular communication system;

The number of consecutive subframes is not greater than the number of consecutive uplink subframes in the uplink and downlink configuration of the subframe configured by the time division duplex cellular communication system.

Method embodiment three

This embodiment provides a device-to-device communication method. As shown in FIG. 3, the method includes:

Step 301: Receive a configuration message of a D2D resource from a network node.

Step 302: Determine a resource set for the D2D communication according to the configuration message.

Step 303: Detect a D2D signal in the resource set.

The configuration message at least includes: indicating a resource set for detecting the D2D signal, where the resource set is a periodic distribution, and each resource period includes dividing by time division multiplexing and/or frequency division multiplexing. And a plurality of resource units; correspondingly, the D2D signal is transmitted in the plurality of resource units in one resource period, and the plurality of resource units are discretely distributed in the time domain and/or the frequency domain according to a preset rule.

The frequency domain discrete distribution is that the frequency positions occupied by the multiple resource units are discontinuous; the time domain discrete distribution is that the time domain locations occupied by the multiple resource units are discontinuous; the frequency domain and the time domain are The discrete distribution is that the frequency domain location and the time location occupied by the multiple resource units are discontinuous.

The preset rule is: a frequency domain position interval of two adjacent resource units in the plurality of resource units for transmitting the D2D signal is K/2; or, the method for transmitting the D2D signal The frequency domain location interval of two adjacent resource units in the plurality of resource units is K/m;

The K is the number of frequency domain available resource units used for device-to-device communication, and m is the number of resource units used to transmit the D2D signal in one resource period.

The preset rule is: a time domain location interval of two adjacent ones of the plurality of resource units for transmitting the D2D signal is L/2;

Or the time domain location interval of two adjacent resource units in the multiple resource units for transmitting the D2D signal is L/n;

Or the time domain location interval of two adjacent resource units in the plurality of resource units for transmitting the D2D signal is L1/2;

Or the time domain location interval of two adjacent resource units in the multiple resource units for transmitting the D2D signal is L1/n;

The L is the number of time domain available resource units in a resource period for device-to-device communication, and L1 is the number of time domain available resource units for each resource group in a resource period for device-to-device communication. , n is the number of resource elements used for the D2D signal transmission in one resource period.

Preferably, the resource units in the resource period are grouped in a time domain according to the number of the dedicated resource units in one resource period, and the number of available time unit in each resource group is used for the D2D The number of dedicated resource units for signal transmission is the same; the resource unit is for D2D signal transmission.

Preferably, the method further comprises: determining a location of a specific resource unit of the plurality of resource units for transmitting the D2D signal; determining a location of the other resource unit according to the location of the specific resource unit and the preset rule Detecting the D2D signal in the particular resource resource and the other resource unit.

Determining, according to a location (1, k) of the specific resource unit and the preset rule, a location of another resource unit in a plurality of resource units for transmitting the D2D signal, where the specific resource unit is the resource period Transmitting a first resource unit of the D2D signal;

The preset rule is: a time position of the ith resource unit that transmits the D2D signal is mod(l+(i-1)*L/m, L), or mod(l+(i-1)*L1/ m, L1), or l, or l+i-1;

and / or,

The frequency position of the i-th resource unit transmitting the D2D signal is mod(k+(i-1)*K/m, K), or mod(k+mod(i-1, 2)*K/2, K ), or k;

Where i is a positive integer less than or equal to m.

Method embodiment 4

The various embodiments provided in the present invention are applicable to a cellular wireless communication system or network. Common cellular wireless communication systems can be based on CDMA (Code Division Multiplexing Access) technology, FDMA (Frequency Division Multiplexing Access), and OFDMA (Orthogonal Frequency-Frequency Multiple Access) technology. , SC-FDMA (Single Carrier-FDMA, single carrier frequency division multiple access) technology. For example, 3GPP (3rd Generation Partnership Project) LTE (Long Term Evolution)/LTE-A (LTE-Advanced) cellular communication system downlink (or forward link) is based on OFDMA technology, The uplink (or reverse link) is based on SC-FDMA multiple access technology. In the future, it is possible to support hybrid multiple access technology on one link.

In an OFDMA/SC-FDMA system, a radio resource for communication is a form of time-frequency two-dimensional. For example, for an LTE/LTE-A system, uplink and downlink communication resources are divided in units of radio frames in the time direction, and each radio frame has a length of 10 ms, including There are 10 sub-frames of length 1 ms, each of which includes two slots of length 0.5 ms, as shown in FIG. According to the configuration of the Cyclic Prefix (CP), each time slot may include 6 or 7 OFDM or SC-FDM symbols.

In the frequency direction, the resources are divided into subcarriers. In the communication, the smallest unit of frequency domain resource allocation is RB (Resource Block), and one PRB (Physical RB) of the corresponding physical resource. ). A PRB contains 12 sub-carriers in the frequency domain, corresponding to one slot in the time domain. The two PRBs adjacent to each other in the time domain of the subframe are called PRB pairs. A resource corresponding to one subcarrier on each OFDM/SC-FDM symbol is referred to as a Resource Element (RE).

FIG. 5 is a schematic diagram of network deployment of a cellular wireless communication system. The figure shown may be a 3GPP LTE/LTE-A system, or other cellular wireless communication technology. In an access network of a cellular radio communication system, a network device generally includes a certain number of base stations (also referred to as a Node B, a Node B, or an evolved Node B, an evolved Node B, an eNB, or an enhanced Node B, Enhanced Node B, eNB), and other network entities or network elements. Or, in general, it can also be collectively referred to as an E-UTRAN (Evolved Universal Terrestrial Radio Access Network) in 3GPP.

The base station also includes a low power node (LPN) in the network, such as a femto cell or a home base station (pico, relay, femto, HeNB, etc.), and may also be collectively referred to as a small cell. (small cell).

For simplicity of description, only three base stations 51 are shown in FIG. The base station provides a certain wireless signal The coverage of the terminal (terminal, or user equipment 52, User Equipment, UE, or device) within the coverage area can be wirelessly communicated with the base station. The radio signal coverage area of one base station may be divided into one or more cell cells or sector sectors based on certain criteria, for example, there may be three cells.

Device discovery is a key technology in D2D communication. That is, UEs performing D2D communication first need to realize mutual discovery. This is referred to herein as discovery of D2D communication or D2D discovery or device discovery. In this paper, the device discovery is realized by the transmission and detection of the Discovery Signal between user equipments. In the described embodiments of the present invention, the discovery signal includes a message portion, and the payload of the discovery signal carried by the message portion may affect the performance of the device discovery. For example, a larger load may result in an increase in the bit rate of the discovery signal, which may result in a drop in performance.

When the signal load is found to be large, more resources can be allocated for discovery signal transmission to ensure its performance. For convenience of description, we define resource-to-device communication resource units, each of which includes one or more PRBs. For example, one resource unit may include 1 PRB pair, or 2 PRB pairs. When two PRB pairs are included, the two PRB pairs may be consecutive in the time domain or continuous in the frequency domain. When there is only one PRB pair in the resource unit, the meaning of the resource unit and the PRB pair is the same.

In the scenario shown in FIG. 5, the UE-side operation procedure of the D2D communication method in this embodiment may include: receiving, by the user equipment (UE, User Equipment), a D2D resource configuration message, and determining, according to the configuration message, that it is used for D2D. a resource for signal transmission; the UE transmits a D2D signal in the resource.

The configuration message is at least used to indicate a resource set for transmitting the D2D signal, the device-to-device resource set has a resource period, and resources in each of the periods are time-division multiplexed and/or frequency-division multiplexed. The way is divided into resource units.

For example, a network device (such as a base station) transmits a resource set for indicating transmission of a D2D signal. The configuration message, the user equipment receives the configuration message.

The configuration message may be a high-level signaling, such as a public RRC (Radio Resource Control) signaling, and the network device sends the signaling in a broadcast manner, for example, it may be carried in a system information block (SIB). The network device can also be dedicated to the RRC signaling, and the network device sends the user equipment to the user equipment in a dedicated signaling manner.

Preferably, the device-to-device resource set indicated by the D2D resource configuration message has a period, and the resource set configured by the configuration message may be a resource that lasts for multiple periods. During a resource period, the resources are divided into resource units in a time division multiplex and/or frequency division multiplex manner (see the foregoing for definition of resource units). The resource period configuration may be a period indicating the set of resources by the configuration message, for example, 320 ms (milliseconds, or 320 subframes), or 640 ms, and the like. The configuration message simultaneously indicates the time and frequency location of the device-to-device resource within the resource period. For example, indicating that a specific subframe (such as an uplink subframe) in the resource period is a device-to-device resource, and the subframes configured for D2D may be continuously or discretely distributed; and indicate a frequency location, for example, in a bandwidth of 10 MHz. In the carrier of the LTE/LTE-A system, the effective bandwidth of the frequency domain is 50 PRBs, and part of the bandwidth can be allocated for D2D.

FIG. 6 is an example of a D2D resource configuration. The allocated resources are used for device discovery, and the resource period is 1280 ms (128 radio frames), and 8 subframes are allocated in each resource period as time domain resources discovered by the device, and the 8 subframes are consecutive; each sub-frame is allocated. The 40 PRBs in the middle of the frequency band are used for device discovery. In this case, 8 subframes in the domain and 40 RBs in the frequency domain are device discovery resources in one resource period of the resource set.

Preferably, the device-to-device resource in the device-to-device resource set period in the D2D resource configuration message includes P resource groups in the time domain, P is an integer and P>1, and each of the resource groups includes a time domain. Continuous subframes are used for device-to-device communication; resource packets within the resource period are discretely distributed and within one resource period, in different resource groups The number of subframes is the same. By grouping the resources, cellular communication can be performed in subframes between packets, preventing device-to-device long-term occupation of time domain resources from causing cellular communication to be blocked.

Further, the number of time domain contiguous subframes used for the device-to-device communication in the packet is not greater than the length of an uplink Semi-Persistent Scheduling (SPS) interval, where the SPS interval is The minimum value of the SPS interval allowed by the cellular communication system. For example, the minimum value is 10 ms, then the number of time domain contiguous subframes for the device-to-device communication within the packet is no more than ten. That is, the number of consecutive subframes allocated in the system is limited to no more than 10. It can be specifically limited to 10, or 9, or 8, or 4, or 2, and so on.

Further, the number of time domain contiguous subframes used for the device-to-device communication in the packet is not greater than a Hybrid Automatic Repeat Request (HARQ) round trip time (RTT). . For example, in an FDD cellular system, the HARQ RTT of the LTE/LTE-A uplink is 8 ms, and the number of time-domain contiguous subframes for the device-to-device communication within the packet is not more than 8. That is, the number of consecutive subframes allocated in the system is limited to no more than eight. It can be specifically limited to 8, or 6, or 4, or 2, and so on.

The above-mentioned limitation on the number of consecutive device-to-device communication sub-frames in the packet can prevent the D2D from affecting the cellular service, for example, it is limited to be no more than the SPS interval, and the uplink SPS transmission of the cellular link of some UEs that can ensure D2D blocking is not greater than 1 time; limited to no more than HARQ RTT, can ensure that the retransmission of the uplink HARQ process of the D2D blocked cellular link is not more than one.

Further, the above “not greater than” may be defined as “less than”, that is, the number of time domain consecutive subframes used for the device-to-device communication in the packet is smaller than the uplink SPS interval or smaller than the HARQ RTT. No longer.

Further, in the TDD cellular communication system, the device is used in the packet The number of consecutive time-domain subframes in the standby communication is not greater than the number of consecutive uplink subframes in the uplink-downlink configuration (UL-DL configuration) of the TDD subframe. The uplink and downlink configuration of the subframe of the TDD LTE/LTE-A system is shown in Table 1.

Table 1: Uplink and downlink configuration of LTE/LTE-A TDD system subframes

The uplink and downlink configuration of the TDD subframe may be the uplink/downlink configuration 0 or the uplink and downlink configuration 1, and the consecutive D2D communication subframes are no more than three. Or, based on the currently used subframe uplink and downlink configuration determination, for example, the subframe uplink and downlink configuration used by the current cellular system is configured as 1, and the consecutive D2D communication subframes are no more than two.

FIG. 7 is another example of D2D resource configuration. The allocated resources are also used for device discovery, and the resource period is 5120 ms (512 radio frames), and 32 subframes are allocated in each resource period as device discovery time domain resources, and the 32 subframes are discontinuous, for example, in this example. The 32 subframes are divided into 4 groups, and each group of 8 subframes is continuous, and the 4 groups of subframes are discretely distributed in one resource period. The allocation of frequency domain resources can be similar to the above example. The radio frame indicated by the hatching in the figure includes a discovery subframe. It should be noted that only a set of consecutive discovery sub-frames are drawn in the figure, and other groups are similar.

It should be noted that the above figures and the distribution of the D2D resource set in the resource period in the legend are all examples, and do not constitute a limitation on the related scheme. For example, the description in the relevant example The continuous device discovery sub-frame is located in one radio frame, and does not mean that only this configuration mode can be supported. For example, the device discovery sub-frame can be continuous across the radio frame.

In still another embodiment, the device-to-device resource in the device-to-device resource set resource period includes P resource groups in the time domain, P is an integer and P>1, and each of the resource groups includes several sub-packets. A frame is used for the device-to-device communication; resource packets within the resource period are discretely distributed and within one resource period, the number of subframes in different resource packets is the same. By grouping the resources, cellular communication can be performed in subframes between packets, preventing device-to-device long-term occupation of time domain resources from causing cellular communication to be blocked.

Further, the time domain span of the subframe used for the device-to-device communication in the packet is not greater than the length of an uplink semi-persistent scheduling (SPS) interval, and the SPS interval is a cell. The minimum value of the SPS interval allowed by the communication system. For example, if the minimum value is 10 ms, then the time domain span of the subframe for the device-to-device communication within the packet is no more than 10 subframes. It can be specifically limited to 10, or 9, or 8, or 4, or 2, and so on.

Further, the time domain span of the subframe used for the device-to-device communication in the packet is not greater than the Hybrid Automatic Repeat Request (HARQ) round trip time (RTT). ). For example, in the TDD cellular system, the HARQ RTT of the LTE/LTE-A uplink is determined by the specific uplink and downlink configuration of the subframe. For example, if the HARQ RTT in the uplink and downlink configuration of some subframes is 10 ms, the intra-packet is used. The time domain span of the device-to-device communication subframe is no more than 10 subframes. It can be specifically limited to 8, or 6, or 4, or 2, and so on.

By limiting the number of consecutive device-to-device communication subframes in a packet as described above, it is possible to prevent D2D from affecting cellular services, especially in a TDD cellular system. For example, it is defined as not more than the SPS interval, and the uplink SPS transmission of the cellular link of some UEs that can ensure D2D blocking is not more than one time; the cellular chain that is guaranteed to be D2D blocked is not limited to the HARQ RTT. The retransmission of the uplink HARQ process is no more than one.

Further, the above “not greater than” may be defined as “less than”, that is, the number of time domain consecutive subframes used for the device-to-device communication in the packet is smaller than the uplink SPS interval or smaller than the HARQ RTT. No longer.

Further, the time domain span of the subframe used for the device-to-device communication in the packet is not greater than the length of the S radio frames, and S>=1. For example, the time domain span of the subframes used for the device-to-device communication within the packet may be defined to be no more than one radio frame, ie, S=1. No longer.

It should be noted that device-to-device communication in related description refers to transmission of D2D signals or channels between terminals, including but not limited to device-to-device discovery signals/channels, device-to-device control signaling/scheduling allocation signaling or bearers. The channel of the signaling, the device-to-device service data or the channel carrying the data, and the like.

In one embodiment, the D2D signal of the user equipment is transmitted in a plurality of resource units and the plurality of resource units are discretely distributed in a time domain and/or a frequency domain during one resource period. The discrete distribution of the plurality of resource units for transmitting the D2D signal in the time domain and/or the frequency domain includes at least one of the following: the frequency domain discrete distribution means that the frequency positions occupied by the plurality of resource units are discontinuous; The time domain discretely distributed means that the time domain positions occupied by the plurality of resource units are discontinuous; the frequency domain and the time domain are discretely distributed, which means that the frequency domain locations and time positions occupied by the plurality of resource units are both Discontinuous. In other words, when the D2D signal of the user equipment is transmitted in multiple resource units and the plurality of resource units are discretely distributed in the frequency domain, the time domain locations of the multiple resource units are continuous; the user equipment The D2D signal is transmitted in a plurality of resource units, and the plurality of resource units are discretely distributed in the time domain, the frequency domain locations of the plurality of resource units are continuous; the D2D signal of the user equipment is in multiple resource units When the medium transmission and the plurality of resource units are discretely distributed in the time domain and the frequency domain, the frequency domain location and the time domain location of the multiple resource units are not continuous.

In one embodiment, a frequency domain location interval of two adjacent resource elements of a plurality of resource elements for transmitting the D2D signal is K/2; wherein K is a frequency domain available resource unit for device-to-device communication The number. The two adjacent resource units refer to two resource units in the plurality of resource units that are closest to each other in any time domain position. If the plurality of resource units include only two resource units, the two adjacent resource units refer to the two resource units.

In one embodiment, a frequency domain location interval of two adjacent resource elements of a plurality of resource elements for transmitting the D2D signal is K/m; wherein K is a frequency domain available resource unit for device-to-device communication The number of m is the number of resource elements used to transmit the D2D signal within one resource period.

In one embodiment, a time domain location interval of two adjacent resource elements of a plurality of resource elements for transmitting the D2D signal is L/2; wherein L is a time domain within a resource period for device-to-device communication The number of available resource units.

Figure 8 shows a specific example. In this example, the D2D signal of a particular user equipment is transmitted in 2 resource elements during one resource period. Each resource unit is the same size as a PRB pair. In this example, to describe the simple hypothesis K=8, L=6, that is, there are 48 resource units in one resource period. For a specific UE, its D2D signal is transmitted in 2 resource units in one resource period; the frequency intervals of the 2 resource units are K/2=4, and the time positions are the same.

Figure 9 shows a specific example. In this example, the D2D signal of a particular user equipment is transmitted in 2 resource elements during one resource period. Each resource unit is the same size as a PRB pair. In this example, for the sake of simplicity, it is also assumed that K=8, L=6, that is, there are 48 resource units in one resource period. For a specific UE, its D2D signal is transmitted in 2 resource units in one resource period; the time interval of the 2 resource units is L/2=3, and the frequency positions are the same.

Figure 10 shows a specific example. In this example, the D2D signal of a particular user equipment is transmitted in 2 resource elements during one resource period. Each resource unit is the same size as a PRB pair. In this example, for the sake of simplicity, it is also assumed that K=8, L=6, that is, there are 48 resource units in one resource period. For a specific UE, its D2D signal is transmitted in 2 resource units in one resource period; the frequency interval of the 2 resource units is K/2=4, and the time interval is L/2=3.

Figure 11 shows another specific example. In this example, the size of the resource unit is the bandwidth of two consecutive PRBs in the frequency domain, and the time domain is one PRB pair, that is, one subframe. In other words, 1 resource unit includes 2 consecutive PRB pairs in the frequency domain. In this example, to describe the simple hypothesis K=4, L=4, that is, there are 16 resource units in one resource period. For a specific UE, its D2D signal is transmitted in 2 resource units in one resource period; the frequency interval of the 2 resource units is K/2=4, and the time interval is L/2=3. Note that one square in the figure represents one PRB pair. Similarly, similar to the examples of FIG. 9 and FIG. 10, the two resource units may be discontinuous only in the frequency domain or only in the time domain, and will not be described again.

Figure 12 shows a specific example. In this example, the D2D signal of a particular user equipment is transmitted in 2 resource elements during one resource period. The size of each resource unit is NUM consecutive PRB pairs in the frequency domain, and NUM is greater than or equal to 1. In this example, for the sake of simplicity, it is also assumed that K=8, L=6, that is, there are 48 resource units in one resource period. For a specific UE, its D2D signal is transmitted in 2 resource units in one resource period; the frequency interval of the 2 resource units is K/2=4, which is continuous in time.

In one embodiment, a time domain location interval of two adjacent resource units of the plurality of resource units for transmitting the D2D signal is L/n; wherein L is a time domain within a resource period for device-to-device communication The number of available resource units, where n is the number of resource elements used to transmit the D2D signal within one resource period.

Figure 13 shows a specific example. In this example, within a resource cycle, specific The D2D signal of the user equipment is transmitted in 4 resource units. Each resource unit is the same size as a PRB pair. In this example, to describe the simple hypothesis K=8, L=12, that is, there are 96 resource units in one resource period. For a specific UE, its D2D signal is transmitted in 4 resource units in one resource period; among the 4 resource units, the frequency interval between two adjacent resource units is K/2=4, and the time interval is L. /4=3. As mentioned before, two adjacent resource units refer to two of the plurality of resource units that are closest in time domain location. For example, in this example, 1 and 2 are adjacent resource units, 2 and 3 are adjacent resource units, and 3 and 4 are adjacent resource units. The meanings of adjacent resource units in the related embodiments are similar.

Figure 14 shows another specific example. In this example, unlike FIG. 13, the frequency interval of four resource elements for D2D signal transmission for a specific UE is K/4=2, and the time interval is L/4=3.

Figure 15 shows another specific example. In this example, unlike FIG. 14, the four resource elements for D2D signal transmission for a specific UE are continuous in the time domain.

It should be noted that this example is also applicable to the case where the size of the resource unit is more than one PRB pair. For example, one resource unit includes two consecutive PRB pairs in the frequency domain. At this time, the resource units represented by the small squares in FIG. 13 and FIG. 12 include two PRB pairs.

In one embodiment, a time domain location interval of a plurality of resource elements for transmitting the D2D signal is L1/n; wherein L1 is a time domain available resource for each resource group in a resource period for device-to-device communication The number of cells, n is the number of resource elements used to transmit the D2D signal within one resource period. Assuming that the time length of the resource unit is the same as the PRB pair (the length of one subframe), the number of subframes of the device-to-device resource set configured in each resource period is 32, but in the time domain, it corresponds to 4 resource groups, each The resource group includes 8 device-to-device subframes, that is, L1=8, and assumes that the number of resource units transmitting the D2D signal in one resource period is 2, that is, n=2, then the multiple resource units The time interval is 4, that is, 4 subframes or resource units are spaced apart. In this case, it can be further defined, For a UE, the two resource elements transmitting its D2D signal are not grouped across resources, ie, they are located within one resource group.

For example, when the time domain resources in the examples shown in FIGS. 8-15 are defined as resources of each resource group within a resource period, the related scheme still applies. No longer.

In an embodiment, the resource units in the resource period are grouped in a time domain according to the number of the dedicated resource units for the D2D signal transmission in one resource period, and the time domain available resources in each resource group The number of cells is the same as the number of dedicated resource elements used for the D2D signal transmission; the D2D signal is transmitted within one of the resource packets. That is, if the number of resource units transmitting the D2D signal in a resource period is n, then the number of time domain resource units is n in each resource group; the dedicated resource unit transmitting the D2D signal is located in one Within the resource group.

Figure 16 shows a specific example. In this example, the D2D signal of a particular user equipment is transmitted in 2 resource elements (i.e., n = 2) during one resource period. The size of each resource unit is NUM consecutive PRB pairs in the frequency domain, and NUM is greater than or equal to 1. In this example, to describe the simple hypothesis K=8, L=6. Resource units in the resource period are grouped in a time domain according to the number of the dedicated resource units for the D2D signal transmission in one resource period, in this example, the resources are grouped according to n=2, each The number of time domain resource elements within a packet is n, which in this example includes 2 consecutive subframes within each packet. For a specific UE, its D2D signal is transmitted in only one resource group in one resource period, in this example, it is transmitted in two resource units in one resource group; for the two resource units, the frequency thereof The interval is K/2=4, which is continuous in time.

Figure 17 shows another specific example. In this example, the D2D signal of a particular user equipment is transmitted in 4 resource elements (i.e., n = 4) during one resource period. The size of each resource unit is NUM consecutive PRB pairs in the frequency domain, and NUM is greater than or equal to 1. In this example, to describe the simple hypothesis K=8, L=12. For the D2D signal transmission according to a resource period The number of the dedicated resource units is grouped in the time domain for the resource units in the resource period, in this example, the resources are grouped according to n=4, and the number of time domain resource units in each group is n, In this example, 4 consecutive subframes are included in each packet, since the length of time of each resource unit is the same as 1 subframe, that is, the number of time domain resource units in each packet is 4. For a specific UE, the D2D signal is transmitted only in 4 resource units within one resource group in one resource period; for the 4 resource units, the frequency interval is K/n=2, and the time is continuous. .

Fig. 18 shows another specific example. In this example, the frequency interval for the specific UE to transmit the D2D signal is determined to be K/2, and the rest is the same as described in the foregoing example.

It should be noted that, when grouping D2D resources in a resource period, if the number of time domain resource units cannot be divisible by the number of resource units occupied by a specific D2D signal transmission, then the first or last resource in the resource period. Within a packet, the number of time domain resource units may be less than the number of time domain resource units within other packets.

In one embodiment, the D2D signal in the related example is a discovery signal for device discovery or a physical channel carrying a discovery signal.

In one embodiment, the D2D signal in the related example is a signal for device-to-device communication control signaling or scheduling allocation information transmission or a physical channel carrying the signal.

In an embodiment, the D2D signal sent by the user equipment occupies multiple resource units in one resource period, and the information transmitted in the multiple resource units is the same or different. The same means that the information transmitted in the plurality of resource units is a repeated transmission of a set of valid information; the same or different modulation and coding modes and coded redundancy versions may be used in the repeated transmission. For example, the discovery signal or control signaling (or called scheduling assignment) is repeated multiple times in one resource period. Different means that the information transmitted in the plurality of resource units constitutes a complete information, such as a complete discovery signal message.

In one embodiment, the manner in which the user equipment determines a resource location for which to transmit the D2D signal is that the user equipment determines a specific one of the plurality of resource elements used to transmit the D2D signal The location of the resource unit, the locations of other resource units of the plurality of resource units are determined according to agreed rules. The agreed rules are the manner in which the plurality of resource elements are discretely distributed as previously described.

For example, if there are two resource units for transmitting the D2D signal by the UE in one resource period, and the location of the specific resource unit is (1, k), then the time when the UE transmits the second resource unit of the D2D signal The location can be mod(l+L/2,L), or mod(l+L1/2,L1), or l, or l+1; the frequency location of the second resource unit can be mod(k+K/ 2, K), or k.

For example, there are m resource elements for transmitting the D2D signal by the UE in one resource period, and the location of the specific resource unit is (1, k) (assuming that the specific resource unit is represented as the first resource unit), then The time position of the i th resource element of the UE transmitting the D2D signal may be mod(l+(i-1)*L/m, L), or mod(l+(i-1)*L1/m, L1) , or l, or l+i-1; the frequency position of the i-th resource unit can be mod(k+(i-1)*K/m, K), or mod(k+mod(i-1,2) *K/2, K), or k. Where i is a positive integer less than or equal to m.

The above l and k respectively represent the frequency and time domain position of the specific resource unit of the user equipment in one resource period, and l takes a value of 0 to L-1, or 0 to L1-1, and k takes a value of 0 to K. Mod represents the modulo operation, such as mod(5,2)=1. The rest of the letters have the same meaning as described above.

Further, the specific manner of determining the location of the first resource unit may be that the UE randomly selects, that is, the UE randomly selects a resource location for the specific resource unit transmission in the candidate resource unit set. The candidate resource unit set may be a device-to-device resource unit set in a device-to-device resource period, for example, the UE may randomly select among L*K resource units; or the candidate resource unit set may be a device-to-device resource period The number of D2D signals that can be accommodated, for example, each D2D signal is transmitted in m resource units, then random selection in the set of candidate resource units means randomly selected in L*K/m resource units; or The set of candidate resource elements may be a set of device-to-device resource unit packets within a device-to-device resource period, for example, randomly selected among L1*K resource units; or similar to the above, at L1*K/m resources Random selection in the unit. Where m is the number of resource units in which the user equipment transmits the D2D signal in one resource period, and the rest of the letters have the same meaning as described above. Alternatively, the candidate resource unit set is all resource units whose time domain position l of the resource unit in the resource period satisfies mod(l, m)=0.

Further, the user equipment may determine the location of the first resource unit according to an indication of the network device (such as a base station). For example, the base station transmits a second resource configuration message to the user equipment, the second resource configuration message instructing the user equipment to transmit the time and frequency position of the first resource unit of the D2D signal in one resource period. The second resource configuration message may be user equipment dedicated RRC signaling or physical layer signaling.

In an embodiment, the second resource configuration message sent by the base station to the user equipment includes a time domain resource indication parameter and a frequency domain resource indication parameter, where the time domain resource indication parameter and the frequency domain resource indication parameter indicate a user equipment The location of a particular resource unit of the plurality of resource elements of the D2D signal, such as the location of the first resource unit, within the resource period.

Further, the frequency domain resource is indicated by an index. For example, the frequency domain location of the particular resource element is indicated by an index of 0, 1, 2, ..., Kf-1 or 1, 2, ..., Kf. Where Kf is the total number of available D2D signal resource units in the frequency domain (ie, the number of D2D resources configured in the resource period). Or Kf is the total number of resource units in the frequency domain. For example, in the LTE system, when the system bandwidth is 10 MHz, the total number of resource blocks in the frequency domain is 50, the total number of resource units is 50/Mu, and Mu is one D2D resource unit. Frequency domain bandwidth, expressed in units of resource blocks. When 50/Mu is a non-integer, round to round or round down or round up.

Alternatively, the frequency domain resource is indicated by a bitmap. For example, the frequency domain location of the specific resource unit is indicated by a bitmap of length Kf. Where Kf The meaning is the same as above.

Further, the time domain resource is indicated by an index. For example, then the time domain location of the particular resource unit is indicated by the index 0, 1, 2, ..., Kt-1 or 1, 2, ..., Kt. Where Kt is the total number of D2D signal available resource units in the time domain in the resource period (ie, the number of D2D resources configured in the resource period, if the time span of the resource unit is 1 subframe, then the number of D2D subframes in the resource period) . Or Kt is the maximum number of resource units in the time domain allowed in the resource period. For example, in the LTE FDD system, it is assumed that a maximum of 200 discovery subframes can be configured in each D2D discovery period, and then Kt is 200, regardless of the actually configured D2D. What is the number of sub-frames found.

Alternatively, the time domain location of the particular resource unit is indicated by an index of 0, 1, 2, ..., Kt/m-1 or 1, 2, ..., Kt/m. Where m is the number of D2D resource units occupied by the D2D signal in one resource period. For example, when the D2D signal is repeatedly transmitted in the resource period, m represents the number of repeated transmissions (for example, the D2D signal is transmitted in one resource period) When four resource units are occupied, the number of repeated transmissions is four, and the rest of the parameters have the same meaning as described above. When Kt/m is a non-integer, it is rounded off or rounded down or rounded up.

In one embodiment, the manner in which the user equipment determines the resource location for which the D2D signal is transmitted is that the user equipment determines the location of the virtual resource for transmitting the D2D signal and based on the mapping relationship between the virtual resource and the physical resource. A location of a plurality of physical resource units for transmitting D2D signals is determined.

For example, if the number of D2D signal resources in a resource period is L*K in resource units, the number of corresponding virtual resources may be agreed as L*K/m. Where m is the number of resource units occupied by a specific user equipment transmitting D2D signals in one resource period, and the remaining letters have the same meaning as described above. At the same time, there is an agreed mapping relationship between the virtual resource and the physical resource unit. For example, the mapping relationship is that the virtual resource location (or number) corresponds to a D2D signal transmission. One of several resource units, such as the first one. The location of the remaining resource elements is determined in accordance with the agreed rules between the plurality of resource elements described above.

Further, the specific manner of determining the location (or number) of the virtual resource may be that the UE randomly selects, that is, the location (or number) of the virtual resource that the UE randomly selects in the virtual resource unit candidate set. The virtual resource unit candidate set may be a set corresponding to resource units in one resource period in the resource set, for example, the UE may randomly select among L*K/m virtual resources; or one device to device in a device to device resource period The set corresponding to the resource unit group is randomly selected, for example, among L1*K/m virtual resources. Where m is the number of resource units in which the user equipment transmits the D2D signal in one resource period, and the rest of the letters have the same meaning as described above.

Further, the user equipment may determine the location (or number) of the virtual resource according to an indication of the network device (such as a base station). For example, the second resource configuration message is transmitted by the base station to the user equipment, where the second resource configuration message indicates the location (or number) of the virtual resource of the D2D signal transmitted by the user equipment in one resource period. The second resource configuration message may be user equipment dedicated RRC signaling or physical layer signaling.

Device embodiment 1

In this embodiment, a D2D communication system is provided. FIG. 19 is a schematic structural diagram of a wireless communication system according to an embodiment of the present invention. The wireless communication system according to an embodiment of the present invention includes: a network side device 1902 of a cellular network, a first user equipment 1904, and a second user equipment 1906. The above entities will be described separately below.

In one embodiment, the network side device 1902 of the cellular network may be configured to perform configuration of device discovery resources.

As shown in FIG. 20, the network side device 1902 may include at least:

The configuration module 2002 is configured to generate a D2D first resource configuration message.

The sending module 2004 is configured to send the D2D first resource configuration message to the D2D user setting Prepare the UE.

The configuration module 2002 is configured to configure a device-to-device wireless resource and generate a corresponding configuration message.

The first resource configuration message includes a resource set for allocating D2D, and the resource set is used for transmission of a device-to-device signal; wherein the resource set is periodically distributed, and each resource cycle includes A plurality of resource units divided by time division multiplexing and/or frequency division multiplexing; the resource set is used by the D2D user equipment to transmit the D2D signal.

For example, the device discovery resource may be configured in a resource cycle manner, and the device discovery radio resources in each resource cycle are divided into discovery resource units by means of time division multiplexing and/or frequency division multiplexing, and each discovery signal may be in the A discovery resource unit is transmitted on.

In an embodiment, the network side device 1902 may be a base station (base station or eNB), or other network access device, such as a small cell, or may be a higher layer network node, such as a gateway, or mobility management. Mobility Management Entity (MME), or other server or network unit that provides services for D2D, or one or more of the above nodes.

In an embodiment, the network side device 1902 may also be a network unit temporarily deployed in an uncovered scenario. The uncovered scenario refers to a scenario where the user equipment is in a blind spot of the cellular network coverage, such as a damaged cellular infrastructure, or covering a hollow area, and the like.

In an embodiment, the network side device 1902 may also be a UE that acts as a cluster head or a primary UE, for example, in a specific scenario, such as a scenario without network coverage, by a specific user equipment. The device discovers the configuration of the resource.

The manner of the discrete distribution includes at least one of: a frequency location of the plurality of resource units is discontinuous; a temporal location of the plurality of resource units is discontinuous; a frequency location and a temporal location of the plurality of resource units are discontinuous .

The preset rule is: adjacent one of the multiple resource units for transmitting the D2D signal The frequency domain location interval of the two resource units is K/2; or the frequency domain location interval of two adjacent resource units of the plurality of resource units for transmitting the D2D signal is K/m; K is the number of frequency domain available resource units for device-to-device communication, and m is the number of resource units for transmitting the D2D signal within one resource period.

The preset rule is: a time domain location interval of two adjacent ones of the plurality of resource units for transmitting the D2D signal is L/2;

Or the time domain location interval of two adjacent resource units in the multiple resource units for transmitting the D2D signal is L/n;

Or the time domain location interval of two adjacent resource units in the plurality of resource units for transmitting the D2D signal is L1/2;

Or the time domain location interval of two adjacent resource units in the multiple resource units for transmitting the D2D signal is L1/n;

The L is the number of time domain available resource units in a resource period for device-to-device communication, and L1 is the number of time domain available resource units for each resource group in a resource period for device-to-device communication. , n is the number of resource elements used for the D2D signal transmission in one resource period.

The sending module is further configured to send a D2D second resource configuration message, where the second resource configuration message includes a location of a first resource unit that indicates a plurality of resource units that transmit the D2D signal; or a location of the resource, the location of the virtual resource having a predetermined mapping relationship with a plurality of resource units for transmitting the D2D signal. In one embodiment, the first user equipment 1904 can include as shown in FIG. :

The first communication unit 2102 is configured to receive a D2D first resource configuration message from the network node, where

The baseband processing unit 2104 is configured to determine, according to the first resource configuration message, a resource set for allocating D2D;

a second communication unit 2106, configured to send the device-to-device communication signal in the D2D resource set; wherein the resource set is used for device-to-device signal transmission; the resource set is periodically distributed, Each resource period includes a plurality of resource units divided by time division multiplexing and/or frequency division multiplexing.

Preferably, the second communication unit 2106 is configured to send the D2D signal in the dedicated resource unit. Correspondingly, the baseband processing unit 2104 is further configured to determine, from the resource set, a signal for transmitting a D2D. The location of the dedicated resource unit.

In one embodiment, the second user equipment 1906 can detect the D2D signal.

In one embodiment, the discrete distribution of the plurality of resource units for transmitting the D2D signal in the time domain and/or the frequency domain includes at least one of the following: the frequency domain discrete distribution refers to the occupied by the plurality of resource units. The frequency position is discontinuous; the time domain is discretely distributed, and the time domain position occupied by the plurality of resource units is discontinuous; the frequency domain and the time domain are discretely distributed, and the frequency domain occupied by the plurality of resource units is used. The position and time position are not continuous.

The baseband processing unit is configured to determine a location of a virtual resource for transmitting the D2D signal, and determine, as the dedicated resource, a location of a plurality of resource units for transmitting the D2D signal according to a location of the virtual resource The location of the unit.

The baseband processing unit is configured to randomly select a location of the virtual resource unit from a virtual resource candidate set; or receive a D2D second resource configuration message from the network node by using the first communication unit, where the second The resource configuration message is at least used to indicate the location of the virtual resource.

The baseband processing unit is configured to determine a location of a specific resource unit of the plurality of resource units for transmitting the D2D signal, and determine, according to the location of the specific resource unit and the preset rule, to transmit the D2D The location of the other resource unit among the plurality of resource units of the signal, the location of the specific resource unit, and the location of the other resource unit as the location of the dedicated resource.

The baseband processing unit is configured to randomly select a location of the specific resource unit in the resource unit candidate set; or receive a device-to-device second resource configuration message from the network node by using the first communication unit, where the second resource configuration The message is at least used to indicate the location of the particular resource unit.

The preset rule is: a frequency domain position interval of two adjacent resource units in the plurality of resource units for transmitting the D2D signal is K/2; or, the method for transmitting the D2D signal The frequency domain location interval of two adjacent resource units in the plurality of resource units is K/m; wherein the K is the number of frequency domain available resource units used for the device-to-device communication, and m is one The number of resource elements used to transmit the D2D signal during the resource period.

The preset rule is: a time domain location interval of two adjacent ones of the plurality of resource units for transmitting the D2D signal is L/2; or a location for transmitting the D2D signal The time domain location interval of two adjacent resource units in the plurality of resource units is L/n; or the time domain location interval of two adjacent resource units in the plurality of resource units for transmitting the D2D signal Or L1/2; or, a time domain location interval of two adjacent ones of the plurality of resource units for transmitting the D2D signal is L1/n; wherein the L is for the device to The number of time domain available resource units in the resource period of device communication, L1 is the number of time domain available resource units for each resource group in the resource period for the device to device communication, and n is used in one resource period. The number of the dedicated resource units transmitted by the D2D signal.

The D2D signal is a discovery signal used for device discovery or a physical channel carrying a discovery signal; or the D2D signal is a control signaling for device communication, or a signal for scheduling allocation information transmission or carrying the signal. Physical channel.

The resource unit in the resource period includes a plurality of resource packets in a time domain; each of the resource packets includes a time domain continuous subframe for transmission of signals of the device-to-device communication; each of the resource packets is discretely distributed And in a resource period, the number of the subframes in different resource groups is the same.

The manner of determining the number of consecutive subframes in the time domain includes at least one of the following:

The number of consecutive subframes is not greater than a length of an uplink semi-persistent scheduling interval, and the semi-persistent scheduling interval is a minimum value of a semi-persistent scheduling interval allowed by the cellular communication system;

The number of consecutive subframes is not greater than the round trip time of the uplink hybrid automatic repeat request;

The number of consecutive subframes is not greater than the number of consecutive uplink subframes in the uplink and downlink configuration 0 of the subframe of the time division duplex cellular communication system;

The number of consecutive subframes is not greater than the number of consecutive uplink subframes in the uplink and downlink configuration 3 of the subframe of the time division duplex cellular communication system;

The number of consecutive subframes is not greater than the number of consecutive uplink subframes in the uplink and downlink configuration of the subframe configured by the time division duplex cellular communication system.

In one embodiment, the D2D signal in the related example is a discovery signal for device discovery or a physical channel carrying a discovery signal.

In one embodiment, the D2D signal in the related example is a signal for device-to-device communication control signaling or scheduling allocation information transmission or a physical channel carrying the signal.

In one embodiment, the manner in which the user equipment determines a resource location for transmitting the D2D signal is that the user equipment determines a location of a first one of the plurality of resource elements for transmitting the D2D signal, the plurality of The location of other resource units in the resource unit is determined according to the agreed rules. The agreed rules are as described above.

In one embodiment, the manner in which the user equipment determines the resource location for which the D2D signal is transmitted is that the user equipment determines the location of the virtual resource for transmitting the D2D signal and based on the mapping relationship between the virtual resource and the physical resource. A location of a plurality of physical resource units for transmitting D2D signals is determined.

Further, the manner of specifically determining the location (or number) of the virtual resource or the first resource unit may be that the baseband processing unit randomly selects, that is, the baseband processing unit randomly selects a virtual resource location (or number) ), or randomly choose the first capital The location of the source unit.

Further, the baseband processing unit may determine a location (or a number) of the virtual resource according to an indication of a network device (such as a base station), or determine a location of the first resource unit according to the indication. For example, the first communication unit receives a second resource configuration message transmitted by the base station to the user equipment, where the second resource configuration message indicates a location (or number) of the virtual resource that the user equipment transmits the D2D signal in one resource period. Or indicate the location of the first resource unit. The second resource configuration message may be user equipment dedicated RRC signaling or physical layer signaling.

The function of the apparatus provided in this embodiment is described in detail below. The user equipment includes:

a first communication unit, configured to receive a D2D first resource configuration message from the network node;

a baseband processing unit, configured to determine, according to the first resource configuration message, a resource for transmitting a D2D signal;

a second communication unit, configured to send a D2D signal at the resource.

Here, the first resource configuration message includes: a resource set indicating transmission of the D2D signal;

The device-to-device resource set includes a resource period, and each of the resource periods includes a plurality of resource units divided by time division multiplexing and/or frequency division multiplexing.

The baseband processing unit is configured to determine, according to the first resource configuration message, a location of a resource unit specified in a resource period for transmitting the D2D signal; the specified resource unit is according to a time domain and/or a frequency Multiple resource units distributed in a discrete manner in a domain;

The manner in which the time domain and/or the frequency domain are discrete includes at least one of the following:

The plurality of resource units occupy a discontinuous frequency location;

The plurality of resource units occupy a discontinuous time domain location;

The plurality of resource units occupy discontinuous frequency domain locations and time locations.

The baseband processing unit is configured to determine a location of a virtual resource for transmitting the D2D signal, and determine, according to a preset mapping manner, a location of multiple resource units for transmitting the D2D signal according to a location of the virtual resource .

The second communication unit is configured to transmit the D2D signal in a resource unit specified in one resource period.

The discontinuous frequency position is: a frequency domain position interval of a resource unit for transmitting the D2D signal is K/2; or a frequency domain position interval of a plurality of resource units for transmitting the D2D signal is K /m;

The K is the number of frequency domain available resource units used for device-to-device communication, and m is the number of resource units used to transmit the D2D signal in one resource period.

The discontinuous time domain location is: a time domain location interval of a plurality of resource units for transmitting the D2D signal is L/2;

Or the time domain location interval of the multiple resource units used for transmitting the D2D signal is L/n;

Or the time domain location interval of the multiple resource units for transmitting the D2D signal is L1/2;

Or the time domain location interval of the multiple resource units used for transmitting the D2D signal is L1/n;

The L is the number of time domain available resource units in a resource period for device-to-device communication, and L1 is the number of time domain available resource units for each resource group in a resource period for device-to-device communication. , n is the number of resource elements used for the D2D signal transmission in one resource period.

The D2D signal is a discovery signal used for device discovery or a physical channel carrying a discovery signal; or

The D2D signal is control signaling for device-to-device communication, or scheduling allocation information transmission The transmitted signal or the physical channel carrying the signal.

The preset mapping manner is: randomly selecting a location of the specific resource unit or a location of the virtual resource unit; or receiving a device-to-device second resource configuration message, determining, according to the second resource configuration message, The location of a particular resource unit or the location of the virtual resource.

The resource unit in the resource period includes a plurality of resource groups in the time domain;

Each of the resource packets includes a time domain contiguous subframe for the device to device communication;

Each of the resource packets is discretely distributed and within one resource period, the number of subframes in different resource packets is the same.

The manner of determining the number of consecutive subframes in the time domain includes at least one of the following:

The number of consecutive subframes is not greater than a length of an uplink semi-persistent scheduling interval, and the semi-persistent scheduling interval is a minimum value of a semi-persistent scheduling interval allowed by the cellular communication system;

The number of consecutive subframes is not greater than the round trip time of the uplink hybrid automatic repeat request;

The number of consecutive subframes is not greater than the number of consecutive uplink subframes in the uplink and downlink configuration 0 of the subframe of the time division duplex cellular communication system;

The number of consecutive subframes is not greater than the number of consecutive uplink subframes in the uplink and downlink configuration 3 of the subframe of the time division duplex cellular communication system;

The number of consecutive subframes is not greater than the number of consecutive uplink subframes in the uplink and downlink configuration of the subframe configured by the time division duplex cellular communication system.

The network node provided by the embodiment of the present invention includes:

a configuration module, configured to generate a D2D first resource configuration message, where the first resource configuration message is used to allocate at least a D2D resource set, where the resource set is used for signal transmission of the device-to-device communication; For periodic distribution, each resource period includes multiple resource units divided by time division multiplexing and/or frequency division multiplexing; the resource set is used by the D2D user equipment to send a D2D signal;

And a sending module, configured to send the D2D first resource configuration message to the D2D user equipment UE.

The specified resource unit is a plurality of resource units distributed in a discrete manner in a time domain and/or a frequency domain;

The manner in which the time domain and/or the frequency domain are discrete includes at least one of the following:

The plurality of resource units occupy a discontinuous frequency location;

The plurality of resource units occupy a discontinuous time domain location;

The plurality of resource units occupy discontinuous frequency domain locations and time locations. .

The discontinuous frequency position is: a frequency domain position interval of a resource unit for transmitting the D2D signal is K/2; or a frequency domain position interval of a plurality of resource units for transmitting the D2D signal is K /m;

The K is the number of frequency domain available resource units used for device-to-device communication, and m is the number of resource units used to transmit the D2D signal in one resource period.

The discontinuous time domain location is: a time domain location interval of a plurality of resource units for transmitting the D2D signal is L/2;

Or the time domain location interval of the multiple resource units used for transmitting the D2D signal is L/n;

Or the time domain location interval of the multiple resource units for transmitting the D2D signal is L1/2;

Or the time domain location interval of the multiple resource units used for transmitting the D2D signal is L1/n;

The L is the number of time domain available resource units in a resource period for device-to-device communication, and L1 is the number of time domain available resource units for each resource group in a resource period for device-to-device communication. , n is the number of resource elements used for the D2D signal transmission in one resource period.

The sending module is further configured to send a D2D second resource configuration message, where the second The resource configuration message includes a location indicating a first resource unit of the plurality of resource units transmitting the D2D signal; or indicating a location of the virtual resource, the location of the virtual resource and a plurality of resources for transmitting the D2D signal There is a preset mapping relationship between units.

The resource unit in the resource period includes a plurality of resource groups in the time domain;

Each of the resource packets includes a time domain contiguous subframe for transmission of the device to device communication signal;

Each of the resource packets is discretely distributed and within one resource period, the number of subframes in different resource packets is the same.

The manner of determining the number of consecutive subframes in the time domain includes at least one of the following:

The number of consecutive subframes is not greater than a length of an uplink semi-persistent scheduling interval, and the semi-persistent scheduling interval is a minimum value of a semi-persistent scheduling interval allowed by the cellular communication system;

The number of consecutive subframes is not greater than the round trip time of the uplink hybrid automatic repeat request;

The number of consecutive subframes is not greater than the number of consecutive uplink subframes in the uplink and downlink configuration 0 of the subframe of the time division duplex cellular communication system;

The number of consecutive subframes is not greater than the number of consecutive uplink subframes in the uplink and downlink configuration 3 of the subframe of the time division duplex cellular communication system;

The number of consecutive subframes is not greater than the number of consecutive uplink subframes in the uplink and downlink configuration of the subframe configured by the time division duplex cellular communication system.

Preferably, another user equipment provided in this embodiment may include:

a first communication module, configured to receive a configuration message of a D2D resource, where the configuration message at least includes: indicating a resource set for detecting the D2D signal, where the device-to-device resource set has a resource period; The resource period includes a plurality of resource units divided by time division multiplexing and/or frequency division multiplexing; correspondingly, in one resource period, the D2D signal is transmitted in multiple resource units, and the multiple Resource units are discretely distributed in the time domain and/or frequency domain;

a baseband processing module, configured to determine, according to the configuration message, a resource set for the D2D communication;

a second communication module, configured to detect a D2D signal in the set of resources.

The frequency domain discrete distribution is that the frequency positions occupied by the multiple resource units are discontinuous;

The time domain discrete distribution is that the time domain location occupied by the multiple resource units is discontinuous;

The frequency domain and the time domain discrete distribution are discontinuous for the frequency domain location and the time location occupied by the multiple resource units.

The discontinuous frequency position is: a frequency domain position interval of a resource unit for transmitting the D2D signal is K/2; or a frequency domain position interval of a plurality of resource units for transmitting the D2D signal is K /m;

The K is the number of frequency domain available resource units used for device-to-device communication, and m is the number of resource units used to transmit the D2D signal in one resource period.

The discontinuous time domain location is: a time domain location interval of a plurality of resource units for transmitting the D2D signal is L/2;

Or the time domain location interval of the multiple resource units used for transmitting the D2D signal is L/n;

Or the time domain location interval of the multiple resource units for transmitting the D2D signal is L1/2;

Or the time domain location interval of the multiple resource units used for transmitting the D2D signal is L1/n;

The L is the number of time domain available resource units in a resource period for device-to-device communication, and L1 is the number of time domain available resource units for each resource group in a resource period for device-to-device communication. , n is the number of resource elements used for the D2D signal transmission in one resource period.

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

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

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

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

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

Claims (47)

A device-to-device D2D communication method, the method comprising: Receiving a D2D first resource configuration message from a network node; Determining a D2D resource set according to the first resource configuration message; Transmitting the device to device D2D signal within the set of resources; The resource set is a periodic distribution, and each resource period includes multiple resource units divided by time division multiplexing and/or frequency division multiplexing. The method of claim 1 wherein the method further comprises: Determining, from the set of resources, a location of a dedicated resource unit for transmitting a D2D signal, and transmitting the D2D signal in the dedicated resource unit; The dedicated resource unit includes a plurality of resource units discretely distributed in a time domain and/or a frequency domain according to a preset rule; The manner of the discrete distribution includes at least one of the following: The frequency locations of the plurality of resource units are not continuous; The time positions of the plurality of resource units are not continuous; The frequency locations and time locations of the plurality of resource units are discontinuous. The method of claim 2, wherein determining a location of a dedicated resource unit for transmitting the D2D signal comprises: Determining a location of a virtual resource for transmitting the D2D signal, and determining a location of a dedicated resource unit for transmitting the D2D signal based on a location of the virtual resource. The method of claim 3, wherein determining a location of the virtual resource for transmitting the D2D signal comprises: Selecting, from the virtual resource candidate set, a location of the virtual resource unit; Or, Receiving a D2D second resource configuration message from the network node, wherein the second resource configuration message is at least used to indicate a location of the virtual resource. The method of claim 1 or 2, wherein determining a location of a dedicated resource unit for transmitting the D2D signal comprises: Determining a location of a specific one of the plurality of resource units for transmitting the D2D signal, and determining, among the plurality of resource units for transmitting the D2D signal, according to the location of the specific resource unit and the preset rule The location of the resource unit, the location of the particular resource unit and the location of the other resource unit as the location of the dedicated resource. The method of claim 5, wherein determining a location of a particular one of the plurality of resource elements for transmitting the D2D signal comprises: Randomly selecting a location of the specific resource unit in a resource unit candidate set; or, Receiving a device-to-device second resource configuration message from the network node, the second resource configuration message being used at least to indicate a location of the particular resource unit. The method according to any one of claims 2 to 6, wherein the preset rule is: a frequency domain position interval of two adjacent resource units of the plurality of resource units for transmitting the D2D signal is K/2; or, the frequency domain position interval of two adjacent resource units of the plurality of resource units for transmitting the D2D signal is K/m; The K is the number of frequency domain available resource units used for the device-to-device communication, and m is the number of resource units used to transmit the D2D signal in the resource period. The method according to any one of claims 2 to 6, wherein the preset rule is: a time domain location interval of adjacent two resource units among the plurality of resource units for transmitting the D2D signal Is L/2; Or the time domain location interval of two adjacent resource units in the multiple resource units for transmitting the D2D signal is L/n; Or the time domain location interval of two adjacent resource units in the plurality of resource units for transmitting the D2D signal is L1/2; Or the time domain location interval of two adjacent resource units in the multiple resource units for transmitting the D2D signal is L1/n; The L is a number of time domain available resource units in a resource period for the device-to-device communication, and L1 is a time domain available resource for each resource group in the resource period of the device-to-device communication. The number of cells, n is the number of dedicated resource units for the D2D signal transmission within one resource period. The method of claim 1 wherein the method further comprises: Allocating resource units in the resource period in a time domain according to the number of the dedicated resource units in one resource period, such that the number of time domain available resource units in each resource unit group, and the D2D are used for The number of the dedicated resource units for signal transmission is the same; The resource unit is for D2D signal transmission; the D2D signal is transmitted within one of the resource packets. The method of claim 5 wherein the method further comprises: Determining, according to a location (1, k) of the specific resource unit and the preset rule, a location of another resource unit of the plurality of resource units for transmitting the D2D signal; The specific resource unit is a first resource unit that transmits the D2D signal in the resource period; The preset rule is: a time position of the ith resource unit that transmits the D2D signal is mod(l+(i-1)*L/m, L), or mod(l+(i-1)*L1/ m, L1), or l, or l+i-1; And/or, the frequency position of the i-th resource unit transmitting the D2D signal is mod(k+(i-1)*K/m, K), or mod(k+mod(i-1, 2)*K /2, K), or k; Where i is a positive integer less than or equal to m. The method according to any one of claims 1 to 6, wherein the D2D signal is a discovery signal for device discovery or a physical channel carrying a discovery signal; or The D2D signal is control signaling for device communication, or scheduling allocation information or a physical channel carrying the control signaling or information. The method of claim 1 wherein the resource elements within the resource period comprise a plurality of resource packets in a time domain; Each of the resource packets includes a time domain contiguous subframe for transmission of the device to device communication signal; Each of the resource packets is discretely distributed and within one resource period, the number of subframes in different resource packets is the same. The method of claim 11, wherein the manner of determining the number of consecutive subframes in the time domain comprises at least one of the following: The number of consecutive subframes is not greater than a length of an uplink semi-persistent scheduling interval, and the semi-persistent scheduling interval is a minimum value of a semi-persistent scheduling interval allowed by the cellular communication system; The number of consecutive subframes is not greater than the round trip time of the uplink hybrid automatic repeat request; The number of consecutive subframes is not greater than the number of consecutive uplink subframes in the uplink and downlink configuration 0 of the subframe of the time division duplex cellular communication system; The number of consecutive subframes is not greater than the number of consecutive uplink subframes in the uplink and downlink configuration 3 of the subframe of the time division duplex cellular communication system; The number of consecutive subframes is not greater than the number of consecutive uplink subframes in the uplink and downlink configuration of the subframe configured by the time division duplex cellular communication system. A D2D communication method, the method comprising: Generating a D2D first resource configuration message; Sending the D2D first resource configuration message to the D2D user equipment UE; the first resource configuration message is used to allocate at least a D2D resource set, where the resource set is used for the device to set Signal transmission of standby communication; The resource set is a periodic distribution, and each resource period includes multiple resource units divided by time division multiplexing and/or frequency division multiplexing. The resource set is used by the D2D user equipment to send a D2D signal. The method of claim 14, wherein the method further comprises: transmitting a D2D second resource configuration message; The second resource configuration message includes: indicating a location of a specific resource unit of the plurality of resource units that transmit the D2D signal; or indicating a location of the virtual resource, where the location of the virtual resource is used to transmit the D2D A plurality of resource units of the signal have a preset mapping relationship. The method of claim 15 wherein The second resource configuration message includes: a time domain resource indication parameter and a frequency domain resource indication parameter; The time domain resource indication parameter is used to indicate to the user equipment a time domain location of a specific resource unit of the plurality of resource units that transmit the D2D signal in a resource period; The frequency domain resource indication parameter is used to indicate to a user equipment, a frequency domain location of a specific resource unit of the plurality of resource units that transmit the D2D signal in a resource period; The frequency domain resource indication parameter is indicated by an index or a bitmap; The time domain resource indication parameter is indicated by an index, and the maximum value of the index is Kt-1 or Kt/m-1 or Kt or Kt/m; Where Kt is the total number of available resource units in the time domain D2D in the resource period or the maximum number of available D2D resource units allowed in the resource period, and m is the number of D2D resource units occupied by the D2D signal in one resource period. A D2D communication method, the method comprising: Receiving a configuration message of the D2D resource from the network node; Determining a resource set for the D2D communication according to the configuration message; Detecting a D2D signal in the set of resources; The configuration message is at least used to indicate a resource set for detecting the D2D signal, where the resource set is a periodic distribution, and each resource period includes multiple divisions by time division multiplexing and/or frequency division multiplexing. Correspondingly, in one resource period, the D2D signal is transmitted in a plurality of resource units, and the plurality of resource units are discretely distributed in a time domain and/or a frequency domain according to a preset rule. The method of claim 17, wherein The frequency domain discrete distribution is that the frequency positions occupied by the multiple resource units are discontinuous; The time domain discrete distribution is that the time domain location occupied by the multiple resource units is discontinuous; The frequency domain and the time domain discrete distribution are discontinuous for the frequency domain location and the time location occupied by the multiple resource units. The method according to claim 18, wherein the preset rule is: a frequency domain position interval of two adjacent ones of the plurality of resource units for transmitting the D2D signal is K/2; or The frequency domain location interval of two adjacent resource units of the plurality of resource units for transmitting the D2D signal is K/m; The K is the number of frequency domain available resource units used for the device-to-device communication, and m is the number of resource units used to transmit the D2D signal in the resource period. The method according to claim 19, wherein the preset rule is: a time domain position interval of adjacent two resource units of the plurality of resource units for transmitting the D2D signal is L/2; Or the time domain location interval of two adjacent resource units in the multiple resource units for transmitting the D2D signal is L/n; Or the time domain location interval of two adjacent resource units in the plurality of resource units for transmitting the D2D signal is L1/2; Or the time domain location interval of two adjacent resource units in the multiple resource units for transmitting the D2D signal is L1/n; The L is a number of time domain available resource units in a resource period for the device-to-device communication, and L1 is a time domain available resource for each resource group in the resource period of the device-to-device communication. The number of cells, n is the number of dedicated resource units for the D2D signal transmission within one resource period. The method according to any one of claims 17 to 20, wherein Resource units in the resource period are grouped in a time domain according to the number of the dedicated resource units in one resource period, and the number of available time domain resource units in each resource group is used for the D2D signal transmission. The number of dedicated resource units is the same; The resource unit is for D2D signal transmission. The method of claim 17, wherein Determining a location of a particular one of the plurality of resource elements for transmitting the D2D signal; Determining, according to a location of the specific resource unit and the preset rule, a location of another resource unit of the plurality of resource units for transmitting the D2D signal; Detecting the D2D signal in the particular resource resource and the other resource unit. The method of claim 17, wherein Determining, according to a location (1, k) of the specific resource unit and the preset rule, a location of another resource unit in a plurality of resource units for transmitting the D2D signal, where the specific resource unit is the resource period Transmitting a first resource unit of the D2D signal; The preset rule is: a time position of the ith resource unit that transmits the D2D signal is mod(l+(i-1)*L/m, L), or mod(l+(i-1)*L1/ m, L1), or l, or l+i-1; and / or, The frequency position of the i-th resource unit transmitting the D2D signal is mod(k+(i-1) *K/m, K), or mod(k+mod(i-1,2)*K/2,K), or k; Where i is a positive integer less than or equal to m. A user equipment comprising: a first communication unit, configured to receive a D2D first resource configuration message from the network node; a baseband processing unit, configured to determine a D2D resource set according to the first resource configuration message; a second communication unit, configured to send the device-to-device communication signal within the D2D resource set; The resource set is used for signal transmission of the device-to-device communication; the resource set is periodically distributed, and each resource cycle includes multiples divided by time division multiplexing and/or frequency division multiplexing. Resource unit. The user equipment according to claim 24, wherein The second communication unit is configured to send the D2D signal in the dedicated resource unit; Correspondingly, the baseband processing unit is configured to determine, from the resource set, a location of a dedicated resource unit for transmitting a D2D signal; The dedicated resource unit is a plurality of resource units discretely distributed in a time domain and/or a frequency domain according to a preset rule; The manner of the discrete distribution includes at least one of the following: The frequency locations of the plurality of resource units are not continuous; The time positions of the plurality of resource units are not continuous; The frequency locations and time locations of the plurality of resource units are discontinuous. The user equipment according to claim 25, wherein the baseband processing unit is configured to determine a location of a virtual resource for transmitting the D2D signal, and determine to transmit the D2D signal according to a location of the virtual resource. The location of multiple resource units as the dedicated resource The location of the source unit. The user equipment according to claim 26, wherein The baseband processing unit is configured to randomly select a location of the virtual resource unit from a virtual resource candidate set; or, Receiving, by the first communication unit, a D2D second resource configuration message from the network node, wherein the second resource configuration message is at least used to indicate a location of the virtual resource. The user equipment according to claim 25, wherein The baseband processing unit is configured to determine a location of a specific resource unit of the plurality of resource units for transmitting the D2D signal, and determine, according to the location of the specific resource unit and the preset rule, to transmit the D2D The location of the other resource unit among the plurality of resource units of the signal, the location of the specific resource unit, and the location of the other resource unit as the location of the dedicated resource. The user equipment according to claim 28, wherein The baseband processing unit is configured to randomly select a location of the specific resource unit from a set of resource unit candidates; or, Receiving, by the first communication unit, a device-to-device second resource configuration message from the network node, the second resource configuration message being used at least to indicate a location of the particular resource unit. The user equipment according to any one of claims 25 to 29, wherein the preset rule is: a frequency domain location interval of two adjacent resource units among the plurality of resource units for transmitting the D2D signal Is K/2; or, the frequency domain position interval of two adjacent resource units of the plurality of resource units for transmitting the D2D signal is K/m; The K is the number of frequency domain available resource units used for the device-to-device communication, and m is the number of resource units used to transmit the D2D signal in the resource period. The user equipment according to any one of claims 25 to 29, wherein the preset rule is: a time domain location of adjacent two resource units of the plurality of resource units for transmitting the D2D signal The interval is L/2; Or the time domain location interval of two adjacent resource units in the multiple resource units for transmitting the D2D signal is L/n; Or the time domain location interval of two adjacent resource units in the plurality of resource units for transmitting the D2D signal is L1/2; Or the time domain location interval of two adjacent resource units in the multiple resource units for transmitting the D2D signal is L1/n; The L is a number of time domain available resource units in a resource period for the device-to-device communication, and L1 is a time domain available resource for each resource group in the resource period of the device-to-device communication. The number of cells, n is the number of dedicated resource units for the D2D signal transmission within one resource period. The user equipment according to claim 24 or 31, wherein the baseband processing unit is configured to group resource units in the resource period in a time domain according to the number of the dedicated resource units in one resource period, so that The number of time domain available resource units within each resource unit packet is the same as the number of the dedicated resource units used for the D2D signal transmission; The resource unit is for D2D signal transmission; the D2D signal is transmitted within one of the resource packets. The user equipment according to claim 28, wherein the baseband processing unit is configured to determine, according to a location (1, k) of the specific resource unit and the preset rule, a plurality of signals for transmitting the D2D signal The location of other resource units in the resource unit; The specific resource unit is a first resource unit that transmits the D2D signal in the resource period; The preset rule is: a time position of the ith resource unit that transmits the D2D signal is Mod(l+(i-1)*L/m,L), or mod(l+(i-1)*L1/m,L1), or l, or l+i-1; And/or, the frequency position of the i-th resource unit transmitting the D2D signal is mod(k+(i-1)*K/m, K), or mod(k+mod(i-1, 2)*K /2, K), or k; Where i is a positive integer less than or equal to m. The user equipment according to any one of claims 25 to 29, wherein the D2D signal is a discovery signal for device discovery or a physical channel carrying a discovery signal; or The D2D signal is control signaling for device communication, or a signal for scheduling allocation information transmission or a physical channel carrying the signal. The user equipment according to claim 25, wherein the resource unit in the resource period includes a plurality of resource packets in a time domain; Each of the resource packets includes a time domain contiguous subframe for transmission of the device to device communication signal; Each of the resource packets is discretely distributed and within one resource period, the number of subframes in different resource packets is the same. The user equipment according to claim 35, wherein the manner of determining the number of consecutive subframes in the time domain comprises at least one of the following: The number of consecutive subframes is not greater than a length of an uplink semi-persistent scheduling interval, and the semi-persistent scheduling interval is a minimum value of a semi-persistent scheduling interval allowed by the cellular communication system; The number of consecutive subframes is not greater than the round trip time of the uplink hybrid automatic repeat request; The number of consecutive subframes is not greater than the number of consecutive uplink subframes in the uplink and downlink configuration 0 of the subframe of the time division duplex cellular communication system; The number of consecutive subframes is not greater than the number of consecutive uplink subframes in the uplink and downlink configuration 3 of the subframe of the time division duplex cellular communication system; The number of consecutive subframes is not greater than the subframes configured by the time division duplex cellular communication system The number of consecutive uplink subframes in the row configuration. A network node, including: a configuration module, configured to generate a D2D first resource configuration message, where the first resource configuration message is used to allocate at least a D2D resource set, where the resource set is used for signal transmission of the device-to-device communication; wherein the resource set For periodic distribution, each resource period includes multiple resource units divided by time division multiplexing and/or frequency division multiplexing; the resource set is used by the D2D user equipment to send a D2D signal; And a sending module, configured to send the D2D first resource configuration message to the D2D user equipment UE. The network node according to claim 37, wherein the sending module is configured to send a D2D second resource configuration message; The second resource configuration message includes a location indicating a first resource unit of a plurality of resource units that transmit the D2D signal; or indicates a location of the virtual resource, where the location of the virtual resource is used to transmit the A plurality of resource units of the D2D signal have a preset mapping relationship between them. A network node according to claim 38, wherein The second resource configuration message includes: a time domain resource indication parameter and a frequency domain resource indication parameter; The time domain resource indication parameter is used to indicate to the user equipment a time domain location of a specific resource unit of the plurality of resource units that transmit the D2D signal in a resource period; The frequency domain resource indication parameter is used to indicate to a user equipment, a frequency domain location of a specific resource unit of the plurality of resource units that transmit the D2D signal in a resource period; The frequency domain resource indication parameter is indicated by an index or a bitmap; The time domain resource indication parameter is indicated by an index, and the maximum value of the index is Kt-1 or Kt/m-1 or Kt or Kt/m; Where Kt is the total number of available resource units in the time domain D2D in the resource period or the maximum number of available D2D resource units allowed in the resource period, and m is the number of D2D resource units occupied by the D2D signal in one resource period. A user equipment comprising: a first communication module, configured to receive a configuration message of the D2D resource from the network node, where the configuration message at least includes: indicating a resource set for detecting the D2D signal, the resource set is periodically distributed, each The resource period includes a plurality of resource units divided by time division multiplexing and/or frequency division multiplexing; correspondingly, in one resource period, the D2D signal is transmitted in multiple resource units, and the multiple The resource unit is discretely distributed in the time domain and/or the frequency domain according to a preset rule; a baseband processing module, configured to determine a resource set for the D2D communication according to the configuration message; The second communication module is configured to detect the D2D signal in the set of resources. The user equipment according to claim 40, wherein the frequency domain discrete distribution is that the frequency positions occupied by the plurality of resource units are discontinuous; The time domain discrete distribution is that the time domain location occupied by the multiple resource units is discontinuous; The frequency domain and the time domain discrete distribution are discontinuous for the frequency domain location and the time location occupied by the multiple resource units. The user equipment according to claim 41, wherein the preset rule is: a frequency domain location interval of a resource unit for transmitting the D2D signal is K/2; or, for transmitting the D2D signal The frequency domain location interval of each resource unit is K/m; The K is the number of frequency domain available resource units used for device-to-device communication, and m is the number of resource units used to transmit the D2D signal in one resource period. The user equipment according to claim 42, wherein the preset rule is: a time domain location interval of a plurality of resource units for transmitting the D2D signal is L/2; Or the time domain location interval of the multiple resource units used for transmitting the D2D signal is L/n; Or the time domain location interval of the multiple resource units for transmitting the D2D signal is L1/2; Or the time domain location interval of the multiple resource units used for transmitting the D2D signal is L1/n; The L is the number of time domain available resource units in a resource period for device-to-device communication, and L1 is the number of time domain available resource units for each resource group in a resource period for device-to-device communication. , n is the number of resource elements used for the D2D signal transmission in one resource period. User equipment according to any one of claims 40 to 43, characterized in that: The baseband processing module is configured to group resource units in the resource period in a time domain according to the number of the dedicated resource units in one resource period, and the number of available resource units in a time domain in each resource group The number of dedicated resource units for the D2D signal transmission is the same; the resource unit is for D2D signal transmission. The user equipment according to claim 40, wherein The baseband processing module is configured to determine a location of a specific resource unit of the plurality of resource units for transmitting the D2D signal; determining, according to the location of the specific resource unit and the preset rule, for transmitting the D2D a location of other resource elements of the plurality of resource elements of the signal; detecting the D2D signal in the particular resource resource and the other resource unit. The user equipment according to claim 40, wherein The baseband processing module is configured to determine, according to a location (1, k) of the specific resource unit and the preset rule, a location of another resource unit of the plurality of resource units for transmitting the D2D signal, a specific resource unit is a first resource unit that transmits the D2D signal in the resource period; The preset rule is: a time position of the ith resource unit that transmits the D2D signal is mod(l+(i-1)*L/m, L), or mod(l+(i-1)*L1/ m, L1), or l, or l+i-1; and / or, The frequency position of the i-th resource unit transmitting the D2D signal is mod(k+(i-1)*K/m, K), or mod(k+mod(i-1, 2)*K/2, K ), or k; Where i is a positive integer less than or equal to m. A device-to-device communication system, the system comprising: a user equipment, configured to receive a D2D first resource configuration message from the network node, and determine, according to the first resource configuration message, a resource for transmitting the D2D signal; And the network node is configured to generate a D2D first resource configuration message, and send the D2D first resource configuration message to the D2D user equipment.

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