WO2017075748A1 - Method and device for determining time-frequency resources - Google Patents

Abstract

Embodiments of the present invention provide a method and device for determining time-frequency resources, relating to the field of communications. The method comprises: obtaining resource information of a first time-frequency resource, wherein the first time-frequency resource comprises a time-domain resource and frequency-domain resource used for sending scheduling assignment (SA) information at a first SA transmission occasion, and the resource information is transmission resource index information of the first time-frequency resource or time-domain resource position information and frequency-domain resource position information of the first time-frequency resource; obtaining index information of a carrier where the frequency-domain resource of the first time-frequency resource is located; and determining a second time-frequency resource according to the resource information and the index information of the carrier, wherein the second time-frequency resource comprises a time-domain resource and a frequency-domain resource used for sending the SA information at another SA transmission occasion. The present invention ensures that any two terminals which use different carriers have at least one SA transmission occasion for sending SA information in different time-domain resources, such that both terminals can receive the SA information from each other.

Description

Method and device for determining time-frequency resources Technical field

The present invention relates to the field of communications, and in particular, to a method and apparatus for determining time-frequency resources.

Background technique

The D2D (Device to Device) system is a system that uses end-to-end direct communication technology. In a D2D system, a terminal can directly transmit data to another terminal, and the base station is no longer required to be transited. In order to implement direct communication between the terminals, the terminal needs to send SA (Scheduling Assignment) information indicating the time-frequency resources and the transmission format used for transmitting the service data to the other terminal, so that the other terminal can receive After the SA information, the service data is received according to the transmission format on the time-frequency resource indicated by the SA information.

The D2D system defines two transmission opportunities, and the terminal sends the SA information twice. The specific analysis is as follows: The terminal selects the SA resource pool configured by the preset or the base station to use the first transmission opportunity to send the SA information. The frequency resource determines the time domain resource used for transmitting the SA information in the second transmission opportunity according to the location information of the time domain resource in the selected time-frequency resource and the location information of the frequency domain resource, and selects the frequency from the SA resource pool. The domain resource, the determined time domain resource and the selected frequency domain resource are used to form the time-frequency resource of the SA information in the second transmission opportunity, respectively, the time-frequency resource and the second transmission opportunity of the first transmission opportunity respectively The SA information is sent on the time-frequency resource.

It should be noted that the D2D system is a half-duplex system. When a terminal sends data in a certain time domain resource, it cannot simultaneously receive data sent by other terminals. Therefore, if both terminals choose to send SA information in the same time domain resource. The two terminals cannot receive the SA information of the other party, and the subsequent communication cannot be performed normally.

If two terminals use different carriers, the time-frequency resources selected by the two terminals for the first transmission opportunity may include location information of the same frequency domain resource and location information of the time-frequency resource, and are determined by resources used by the two terminals. The formulas are also the same, so that the time-domain resources determined by the two terminals through the resource determination formula for the second transmission opportunity are also the same, so that the two terminals are the same in the first transmission opportunity and the second transmission opportunity. The SA information is sent on the time domain resource, so that neither party can receive the SA information of the other party, and subsequent communication cannot be performed normally.

Summary of the invention

In order to ensure that any two terminals using different carriers have at least one SA transmission opportunity to transmit SA information in different time domain resources, so that both parties can receive the SA information of the other party, the embodiment of the present invention provides a time-frequency resource determination. Method and device. The technical solution is as follows:

In a first aspect, a method for determining a time-frequency resource, the method comprising:

And acquiring the resource information of the first time-frequency resource, where the first time-frequency resource is a time domain resource and a frequency domain resource used for sending the SA information in the first scheduled allocation SA transmission opportunity, where the resource information is the first The transmission resource index information of the time-frequency resource or the time domain resource location information and the frequency domain resource location information of the first time-frequency resource;

Obtaining index information of a carrier where the frequency domain resource in the first time-frequency resource is located;

Determining, according to the resource information and the index information of the carrier, a second time-frequency resource, where the second time-frequency resource is a time domain resource and a frequency domain resource used for sending the SA information in other SA transmission opportunities.

In the first aspect, by determining the index information of the carrier used by the terminal when determining the time-frequency resource of the SA information, it is ensured that any two terminals using different carriers determine the second time-frequency resource according to the respective carrier index information, including The time domain resources are different, so that both parties send SA information in different time domain resources, and both parties can receive the SA information of the other party.

In conjunction with the first aspect, in a first possible implementation of the first aspect, the method further includes:

Obtaining time domain resource location information and frequency domain resource location information of the third time-frequency resource, where the third time-frequency resource is a time domain resource used for transmitting the service data corresponding to the SA information in the first service data transmission opportunity And frequency domain resources;

Determining, according to the index information of the carrier, the time domain resource location information of the third time-frequency resource, and the frequency domain resource location information, where the fourth time-frequency resource is in another service data transmission opportunity The time domain resource and the frequency domain resource used for transmitting the service data.

In the first possible implementation manner of the first aspect, by introducing the index information of the carrier used by the terminal when determining the time-frequency resource of the service data, it is ensured that any two terminals using different carriers are in accordance with the respective carrier index. The information determines that the time domain resources included in the second time-frequency resource are different, so that the two parties send service data in different time domain resources, and both parties can receive the service data of the other party.

In conjunction with the first aspect, in a second possible implementation of the first aspect,

The total number of SA transmission opportunities used to send the SA information and the pair of SA information used to send The total number of service data transmission opportunities of the service data is N, and N is an integer greater than or equal to 1;

And, the time domain resource used for transmitting the SA information in the nth SA transmission opportunity is the same as the time domain resource used for transmitting the service data in the nth service data transmission opportunity, n=1, 2...N ;

The method further includes:

Obtaining a frequency domain resource for transmitting the service data in the nth service data transmission opportunity;

The time domain resource for transmitting the SA information within the nth SA transmission opportunity is determined as the time domain resource for transmitting the service data within the nth service data transmission opportunity.

In a second possible implementation manner of the first aspect, since the time domain resource used in the nth SA transmission opportunity is directly determined as the time domain resource used in the nth service data transmission opportunity, the calculation may be reduced. Quantity, improve computing efficiency.

With reference to the second possible implementation manner of the first aspect, in a third possible implementation manner of the first aspect, the acquiring, in the nth service data transmission opportunity, the frequency domain resource used to send the service data ,include:

Obtaining, from the start position or the end position of the frequency domain resource for transmitting the SA information in the nth SA transmission opportunity, obtaining a frequency domain resource for transmitting the service data in the nth service data transmission opportunity .

In a third possible implementation manner of the first aspect, the frequency domain resources used in the nth SA transmission opportunity and the frequency domain resources used in the nth service data transmission opportunity may be contiguous.

With reference to the first aspect, in a fourth possible implementation manner of the first aspect, the determining, by using the resource information and the index information of the carrier, the second time-frequency resource includes:

Determining, according to the resource information, a frequency domain resource included in the second time-frequency resource;

And determining, according to the resource information and the index information of the carrier, a time domain resource included in the second time-frequency resource.

In a fourth possible implementation manner of the first aspect, by introducing index information of a carrier used by the terminal when determining that the terminal sends the time domain resource of the SA information, it is ensured that any two terminals using different carriers are in accordance with the respective carrier index. The time domain resources determined by the information are different.

With reference to the fourth possible implementation manner of the first aspect, in a fifth possible implementation manner of the first aspect, the determining, by the resource information, the index information of the carrier, the second time-frequency resource Time domain resources included, including:

Determining, by using the following formula, the time domain resource b2 included in the second time-frequency resource;

为预设的资源池中或者由基站配置的资源池中包括的频域资源的数目，n_c为所述载波的索引信息，L_PSCCH为所述资源池中包括的时域资源的数目。In the above formula, n _PSCCH is the transmission resource index information,

For the preset resource pool or the number of frequency domain resources included in the resource pool configured by the base station, n _c is index information of the carrier, and L _PSCCH is the number of time domain resources included in the resource pool.

With reference to the fourth possible implementation manner of the first aspect, in a sixth possible implementation manner of the first aspect, the determining, by the resource information, the index information of the carrier, the second time-frequency resource Time domain resources included, including:

Determining, by using the following formula, a time domain resource j(n) included in the second time-frequency resource;

j(n)=mod(j(1)+i(1)*(n-1)+M*(c-1),T)+T*(n-1)

In the above formula, i(1) is the frequency domain resource location information, j(1) is the time domain resource location information, and M is a frequency domain included in a preset resource pool or a resource pool configured by a base station. The number of resources, T is the ratio of the number of time domain resources included in the resource pool configured in the preset resource pool or configured by the base station to N, and N is the total number of SA transmission opportunities included in one transmission period, where n is the first The number of times of any SA transmission opportunity other than the secondary SA transmission opportunity, n is 2, 3, ..., N, and c is the index information of the carrier.

With reference to the fourth possible implementation manner of the foregoing aspect, in a seventh possible implementation manner of the first aspect, the determining, by the resource information, the index information of the carrier, the second time-frequency resource Time domain resources included, including:

Determining, by using the following formula, a time domain resource j(n) included in the second time-frequency resource;

j(n)=mod(j(1)+i(1)*(n-1+c-1)+M*(c-1),T)+T(n-1)

In the above formula, i(1) is the frequency domain resource location information, j(1) is the time domain resource location information, and M is a frequency domain included in a preset resource pool or a resource pool configured by a base station. The number of resources, T is the ratio of the number of time domain resources included in the resource pool configured in the preset resource pool or configured by the base station to N, and N is the total number of SA transmission opportunities included in one transmission period, where n is the first The number of times of any SA transmission opportunity other than the secondary SA transmission opportunity, n is 2, 3, ..., N, and c is the index information of the carrier.

With reference to the fourth possible implementation manner of the foregoing aspect, in an eighth possible implementation manner of the foregoing aspect, the determining, by the resource information, the index information of the carrier, the second time-frequency resource Time domain resources included, including:

By determining the time domain resource j(n) included in the second time-frequency resource as described in the following formula;

j(n)=mod(j(1)+i(1)*(n-1)+M*(c-1),T)+mod(T*(n-1),T*N)

In the above formula, i(1) is the frequency domain resource location information, and j(1) is the time domain resource location letter. M is the number of frequency domain resources included in the resource pool in the preset resource pool or configured by the base station, and T is the number of time domain resources included in the resource pool in the preset resource pool or configured by the base station and N. Ratio, N is the total number of SA transmission opportunities included in one transmission period, n is the number of any SA transmission opportunities other than the first SA transmission opportunity, n is 2, 3...N*S, S is the transmission The number of transmission periods of the SA information, c is index information of the carrier.

With reference to the fourth possible implementation manner of the foregoing aspect, in a ninth possible implementation manner of the first aspect, the determining, by the resource information, the index information of the carrier, the second time-frequency resource Time domain resources included, including:

Determining, by using the following formula, a time domain resource j(n) included in the second time-frequency resource;

j(n)=mod(j(1)+i(1)*(n-1+c-1)+M*(c-1),T)+mod(T*(n-1),T* N)

In the above formula, i(1) is the frequency domain resource location information, j(1) is the time domain resource location information, and M is a frequency domain included in a preset resource pool or a resource pool configured by a base station. The number of resources, T is the ratio of the number of time domain resources included in the resource pool configured in the preset resource pool or configured by the base station to N, and N is the total number of SA transmission opportunities included in one transmission period, where n is the first The number of times of any SA transmission opportunity other than the secondary SA transmission opportunity, n is 2, 3, ..., N*S, where S is the number of transmission periods in which the SA information is transmitted, and c is index information of the carrier.

In conjunction with the first aspect, in a tenth possible implementation manner of the first aspect, the method further includes:

Determining, according to a frequency domain resource location information included in the first time-frequency resource, a frequency domain resource i(n) used by the first terminal to send SA information in the nth SA transmission opportunity;

i(n)=mod(i(1)+k*(n-1), M);

In the above formula, k is a constant, k=0, 1, 2 or 3, and M is the number of frequency domain resources included in the resource pool in the preset resource pool or configured by the base station, i(1) is the Frequency domain resource location information.

In a tenth possible implementation manner of the first aspect, in a scenario in which the SA information and the service data can be sent in the same transmission period, a completely new manner of determining the frequency domain resource is provided.

In a second aspect, a method for determining a time-frequency resource, the method comprising:

Obtaining time domain resource location information and frequency domain resource location information of the first time-frequency resource, where the first time-frequency resource is a time domain resource and a frequency domain resource used for transmitting the service data in the first service data transmission opportunity;

Obtaining index information of a carrier where the frequency domain resource in the first time-frequency resource is located;

Determining, according to the time domain resource location information, the frequency domain resource location information, and the index information A second time-frequency resource is defined, and the second time-frequency resource is a time domain resource and a frequency domain resource used for transmitting the service data in other service data transmission opportunities.

In the first possible implementation manner of the second aspect, by introducing the index information of the carrier used by the terminal when determining the time-frequency resource of the service data, it is ensured that any two terminals using different carriers are in accordance with the respective carrier index. The information determines that the time domain resources included in the second time-frequency resource are different, so that the two parties send service data in different time domain resources, and both parties can receive the service data of the other party.

With reference to the second aspect, in a first possible implementation manner of the second aspect, a total number of service data transmission opportunities for transmitting service data and a total number of SA transmission opportunities for scheduling allocation SA information corresponding to the service data are sent. The order is N, N is an integer greater than or equal to 1;

And, the time domain resource used for transmitting the SA information in the nth SA transmission opportunity is the same as the time domain resource used for transmitting the service data in the nth service data transmission opportunity, n=1, 2...N ;

The method further includes:

Obtaining a frequency domain resource for transmitting the SA information in the nth SA transmission opportunity;

The time domain resource for transmitting the service data in the nth service data transmission opportunity is determined as the time domain resource for transmitting the SA information within the nth SA transmission opportunity.

In the first possible implementation manner of the second aspect, since the time domain resource used in the nth service data transmission opportunity is directly determined as the time domain resource used in the nth SA transmission opportunity, the calculation may be reduced. Quantity, improve computing efficiency.

With reference to the first possible implementation manner of the second aspect, in a second possible implementation manner of the second aspect, the acquiring, by using, the frequency domain resource for sending the SA information in the nth SA transmission opportunity, include:

Obtaining a frequency domain resource for transmitting the SA information in the nth SA transmission opportunity from a start location or an end location of the frequency domain resource used to send the service data in the nth service data transmission opportunity .

In a second possible implementation manner of the second aspect, the frequency domain resources used in the nth SA transmission opportunity and the frequency domain resources used in the nth service data transmission opportunity may be contiguous.

A third aspect is an apparatus for determining a time-frequency resource, the apparatus comprising: a receiving unit and a processing unit;

The receiving unit is configured to acquire resource information of the first time-frequency resource, where the first time-frequency resource is a time domain resource and a frequency domain resource used for transmitting SA information in the first scheduled allocation SA transmission opportunity, The resource information is transmission resource index information of the first time-frequency resource or time domain resource location information and frequency domain resource location information of the first time-frequency resource; acquiring frequency in the first time-frequency resource Index information of the carrier where the domain resource is located;

The processing unit is configured to determine, according to the resource information and the index information of the carrier, a second time-frequency resource, where the second time-frequency resource is a time domain used for sending the SA information in other SA transmission opportunities. Resources and frequency domain resources.

In the third aspect, the processing unit introduces index information of the carrier used by the terminal when determining the time-frequency resource of the SA information, and ensures that any two terminals using different carriers determine the second time-frequency according to the respective carrier index information. The resources include different time domain resources, so that the two parties send SA information in different time domain resources, and both parties can receive the SA information of the other party.

In conjunction with the third aspect, in a first possible implementation of the third aspect,

The receiving unit is further configured to acquire time domain resource location information and frequency domain resource location information of the third time-frequency resource, where the third time-frequency resource is configured to send the SA information in the first service data transmission opportunity. Time domain resources and frequency domain resources used for business data;

The processing unit is further configured to determine, according to the index information of the carrier, the time domain resource location information of the third time-frequency resource, and the frequency domain resource location information, the fourth time-frequency resource, where the fourth time-frequency resource Time domain resources and frequency domain resources used for transmitting the service data within other service data transmission opportunities.

In the first possible implementation manner of the third aspect, by introducing the index information of the carrier used by the terminal when determining the time-frequency resource of the service data, it is ensured that any two terminals using different carriers are in accordance with the respective carrier index. The information determines that the time domain resources included in the second time-frequency resource are different, so that the two parties send service data in different time domain resources, and both parties can receive the service data of the other party.

With reference to the third aspect, in a second possible implementation manner of the third aspect, the total number of SA transmission opportunities for transmitting the SA information and the total number of service data transmission opportunities for sending the service data corresponding to the SA information The order is N, N is an integer greater than or equal to 1;

And, the time domain resource used for transmitting the SA information in the nth SA transmission opportunity is the same as the time domain resource used for transmitting the service data in the nth service data transmission opportunity, n=1, 2...N ;

The receiving unit is further configured to acquire a frequency domain resource used to send the service data in the nth service data transmission opportunity;

The processing unit is further configured to determine a time domain resource used for transmitting SA information in the nth SA transmission opportunity as a time domain resource used to send the service data in the nth service data transmission opportunity.

In a second possible implementation manner of the third aspect, since the time domain resource used in the nth SA transmission opportunity is directly determined as the time domain resource used in the nth service data transmission opportunity, the calculation may be reduced. Quantity, improve computing efficiency.

In conjunction with the second possible implementation of the third aspect, in a third possible implementation of the third aspect,

The receiving unit is configured to acquire, from the start position or the end position of the frequency domain resource used for sending the SA information in the nth SA transmission opportunity, for sending in the nth service data transmission opportunity The frequency domain resources of the business data.

In a third possible implementation manner of the third aspect, the frequency domain resources used in the nth SA transmission opportunity and the frequency domain resources used in the nth service data transmission opportunity may be contiguous.

In conjunction with the third aspect, in a fourth possible implementation of the third aspect,

The processing unit is configured to determine, according to the resource information, a frequency domain resource that is included in the second time-frequency resource, and determine, according to the resource information and the index information of the carrier, a time domain included in the second time-frequency resource. Resources.

In a fourth possible implementation manner of the third aspect, by introducing index information of a carrier used by the terminal when determining that the terminal sends the time domain resource of the SA information, it is ensured that any two terminals using different carriers are in accordance with the respective carrier index. The time domain resources determined by the information are different.

With reference to the fourth possible implementation manner of the third aspect, in a fifth possible implementation manner of the third aspect, the processing unit is configured to determine, by using the following formula, a time domain resource included in the second time-frequency resource B2;

为预设的资源池中或者由基站配置的资源池中包括的频域资源的数目，n_c为所述载波的索引信息，L_PSCCH为所述资源池中包括的时域资源的数目。In the above formula, n _PSCCH is the transmission resource index information,

For the preset resource pool or the number of frequency domain resources included in the resource pool configured by the base station, n _c is index information of the carrier, and L _PSCCH is the number of time domain resources included in the resource pool.

With reference to the fourth possible implementation manner of the third aspect, in a sixth possible implementation manner of the third aspect, the processing unit is configured to determine, by using the following formula, a time domain resource included in the second time-frequency resource j(n);

j(n)=mod(j(1)+i(1)*(n-1)+M*(c-1),T)+T*(n-1)

In the above formula, i(1) is the frequency domain resource location information, j(1) is the time domain resource location information, and M is a frequency domain included in a preset resource pool or a resource pool configured by a base station. The number of resources, T is the ratio of the number of time domain resources included in the resource pool in the preset resource pool or configured by the base station to N Value, N is the total number of SA transmission opportunities included in one transmission period, n is the number of any other SA transmission opportunities except the first SA transmission opportunity, n is 2, 3...N, and c is the carrier Index information.

With reference to the fourth possible implementation manner of the third aspect, in a seventh possible implementation manner of the third aspect, the processing unit is configured to determine, by using the following formula, a time domain resource included in the second time-frequency resource j(n);

j(n)=mod(j(1)+i(1)*(n-1+c-1)+M*(c-1),T)+T(n-1)

In the above formula, i(1) is the frequency domain resource location information, j(1) is the time domain resource location information, and M is a frequency domain included in a preset resource pool or a resource pool configured by a base station. The number of resources, T is the ratio of the number of time domain resources included in the resource pool configured in the preset resource pool or configured by the base station to N, and N is the total number of SA transmission opportunities included in one transmission period, where n is the first The number of times of any SA transmission opportunity other than the secondary SA transmission opportunity, n is 2, 3, ..., N, and c is the index information of the carrier.

With reference to the fourth possible implementation manner of the third aspect, in the eighth possible implementation manner of the third aspect, the processing unit is configured to determine, by using the following formula, a time domain resource included in the second time-frequency resource j(n);

j(n)=mod(j(1)+i(1)*(n-1)+M*(c-1),T)+mod(T*(n-1),T*N)

In the above formula, i(1) is the frequency domain resource location information, j(1) is the time domain resource location information, and M is a frequency domain included in a preset resource pool or a resource pool configured by a base station. The number of resources, T is the ratio of the number of time domain resources included in the resource pool configured in the preset resource pool or configured by the base station to N, and N is the total number of SA transmission opportunities included in one transmission period, where n is the first The number of times of any SA transmission opportunity other than the secondary SA transmission opportunity, n is 2, 3, ..., N*S, where S is the number of transmission periods in which the SA information is transmitted, and c is index information of the carrier.

With reference to the fourth possible implementation manner of the third aspect, in a ninth possible implementation manner of the third aspect, the processing unit is configured to determine, by using the following formula, a time domain resource included in the second time-frequency resource j(n);

j(n)=mod(j(1)+i(1)*(n-1+c-1)+M*(c-1),T)+mod(T*(n-1),T* N)

In the above formula, i(1) is the frequency domain resource location information, j(1) is the time domain resource location information, and M is a frequency domain included in a preset resource pool or a resource pool configured by a base station. The number of resources, T is the ratio of the number of time domain resources included in the resource pool configured in the preset resource pool or configured by the base station to N, and N is the total number of SA transmission opportunities included in one transmission period, where n is the first Secondary SA conveyor The number of times of any other SA transmission opportunity other than the conference, n is 2, 3, ..., N*S, where S is the number of transmission periods in which the SA information is transmitted, and c is the index information of the carrier.

In conjunction with the third aspect, in a tenth possible implementation of the third aspect,

The processing unit is further configured to determine, according to the frequency domain resource location information included in the first time-frequency resource, a frequency domain resource i(n) used by the first terminal to send SA information in the nth SA transmission opportunity according to the following formula: ;

i(n)=mod(i(1)+k*(n-1), M);

In the above formula, k is a constant, k=0, 1, 2 or 3, and M is the number of frequency domain resources included in the resource pool in the preset resource pool or configured by the base station, i(1) is the Frequency domain resource location information.

In a tenth possible implementation manner of the third aspect, in a scenario in which the SA information and the service data can be sent in the same transmission period, a completely new manner of determining the frequency domain resource is provided.

A fourth aspect is an apparatus for determining a time-frequency resource, the apparatus comprising: a receiving unit and a processing unit

The receiving unit is configured to acquire time domain resource location information and frequency domain resource location information of the first time-frequency resource, where the first time-frequency resource is used in the first service data transmission opportunity to send the service data. a resource and a frequency domain resource; acquiring index information of a carrier where the frequency domain resource in the first time-frequency resource is located;

The processing unit is configured to determine, according to the time domain resource location information, the frequency domain resource location information, and the index information, the second time-frequency resource, where the second time-frequency resource is sent in another service data transmission opportunity Time domain resources and frequency domain resources used by the service data.

In the first possible implementation manner of the fourth aspect, by introducing the index information of the carrier used by the terminal when determining the time-frequency resource of the service data, it is ensured that any two terminals using different carriers are in accordance with the respective carrier index. The information determines that the time domain resources included in the second time-frequency resource are different, so that the two parties send service data in different time domain resources, and both parties can receive the service data of the other party.

With reference to the fourth aspect, in a first possible implementation manner of the fourth aspect, a total number of service data transmission opportunities for transmitting service data and a total number of SA transmission opportunities for scheduling SA allocation information corresponding to the service data are sent. The order is N, N is an integer greater than or equal to 1;

And, the time domain resource used for transmitting the SA information in the nth SA transmission opportunity is the same as the time domain resource used for transmitting the service data in the nth service data transmission opportunity, n=1, 2...N ;

The receiving unit is further configured to acquire, in the nth service data transmission opportunity, the SA to be sent. Frequency domain resources of information;

The processing unit is further configured to determine a time domain resource used for transmitting service data in the nth service data transmission opportunity as a time domain resource used to send the SA information in the nth SA transmission opportunity.

In the first possible implementation manner of the fourth aspect, since the time domain resource used in the nth service data transmission opportunity is directly determined as the time domain resource used in the nth SA transmission opportunity, the calculation may be reduced. Quantity, improve computing efficiency.

With reference to the first possible implementation manner of the fourth aspect, in a second possible implementation manner of the fourth aspect,

The receiving unit is configured to acquire, from the start position or the end position of the frequency domain resource used for transmitting the service data in the nth service data transmission opportunity, for sending in the nth SA transmission opportunity The frequency domain resources of the SA information.

In a second possible implementation manner of the fourth aspect, the frequency domain resources used in the nth SA transmission opportunity and the frequency domain resources used in the nth service data transmission opportunity may be contiguous.

The beneficial effects of the technical solutions provided by the embodiments of the present invention are:

In the embodiment of the present invention, when determining that the terminal sends the time-frequency resource of the SA information, the carrier index information of the carrier used by the terminal is introduced, so that the other SA may be determined according to the resource information of the first time-frequency resource and the carrier index information. The time-frequency resource used for transmitting the SA information in the transmission opportunity ensures that any two terminals using different carriers have at least one SA transmission opportunity to transmit SA information in different time domain resources, so that both parties can receive the SA information of the other party.

DRAWINGS

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly described below. It is obvious that the drawings in the following description are only some embodiments of the present invention. Other drawings may also be obtained from those of ordinary skill in the art in light of the inventive work.

1 is a schematic diagram of a D2D system architecture provided by an embodiment of the present invention;

2 is a schematic structural diagram of a terminal according to an embodiment of the present invention;

3-1 is a flowchart of a method for determining a time-frequency resource according to an embodiment of the present invention;

3-2 is a schematic structural diagram of an SA resource pool according to an embodiment of the present invention;

3-3 is a schematic diagram of a time-frequency resource location according to an embodiment of the present invention;

4-1 is a flowchart of another method for determining time-frequency resources according to an embodiment of the present invention;

4-2 is a schematic diagram of another time-frequency resource location according to an embodiment of the present invention;

4-3 is a schematic diagram of a time-frequency resource location for transmitting SA information and service data according to an embodiment of the present invention;

4-4 is a schematic diagram of another time-frequency resource location for transmitting SA information and service data according to an embodiment of the present invention;

4-5 are schematic diagrams showing another location of a time-frequency resource for transmitting SA information and service data according to an embodiment of the present invention;

FIG. 5 is a schematic structural diagram of an apparatus for determining a time-frequency resource according to an embodiment of the present invention.

detailed description

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

The embodiment of the present invention is applied to a D2D system, and the D2D includes a plurality of terminals, and may further include a base station. Referring to FIG. 1, the first terminal and the second terminal are two terminals of the D2D system, and the first terminal may directly send data to the second terminal, and the data sent by the first terminal to the second terminal includes SA information and service data, and the SA The information indicates the time-frequency resource used to transmit the service data and the transmission format. The SA information may be sent before or simultaneously with the service data. The second terminal may receive the SA information, and receive the service data according to the transmission format on the time-frequency resource indicated by the SA information.

The D2D system defines that the number of times of repeatedly transmitting SA information in one transmission period is at least one, and the number of times of repeatedly transmitting service data is at least one, and the number of transmission periods for transmitting SA information or service data is at least one, that is, at least one exists. An SA transmission opportunity is used to transmit SA information, and at least one service data transmission opportunity exists to transmit service data. When the first terminal needs to send the service data, the first terminal needs to acquire the time-frequency resource used to send the service data in each service data transmission opportunity, and obtain the time for sending the SA information in each SA transmission opportunity. And generating, by the frequency resource, SA information corresponding to the service data, where the SA information may include location information of the time-frequency resource of the acquired service data and a transmission format of the service data, and then sending the SA to the second terminal by using the acquired time-frequency resource. Information and the business data.

The time-frequency resource includes a time domain resource and a frequency domain resource, and the time domain resource may be a subframe or a time slot. The D2D system includes an SA resource pool for transmitting SA information and a service resource pool for transmitting service data. The first terminal and the second terminal both include the two resource pools, and the two resource pools may be at the first terminal and The second terminal is configured in the first terminal and the second terminal before leaving the factory, or is configured by the base station in the first terminal and the second terminal after the first terminal and the second terminal access the network. The time-frequency resources used by the first terminal to send the SA information belong to the SA resource pool, and the acquired time-frequency resources used to send the service data belong to the service resource pool.

Optionally, the process for the second terminal to receive the SA information may be: the second terminal detects each time-frequency resource in the SA resource pool, and when the SA information is detected on a certain time-frequency resource, SA information.

Optionally, the time-frequency resource used by the first terminal to obtain the SA information in each SA transmission opportunity may be:

The first terminal may randomly select a time-frequency resource from the SA resource pool as a time-frequency resource for transmitting SA information in the first SA transmission opportunity, or send a scheduling request to the base station and receive the configuration of the base station in the first SA. The time-frequency resource for transmitting the SA information in the transmission opportunity, and then determining the time frequency for transmitting the SA information in each of the other SA transmission opportunities according to the time-frequency resource used for transmitting the SA information in the first SA transmission opportunity. Resources. The specific determination process is described in detail in the subsequent corresponding embodiments, and is not specifically described herein.

The time-frequency resource used by the base station to transmit the SA information in the first SA transmission opportunity may be a time-frequency resource randomly selected by the base station in the SA resource pool or the idle time-frequency resource included in the SA resource pool by the base station. The time-frequency resource selected at random is not limited by the present invention.

Optionally, for the foregoing time, the first terminal acquires the time-frequency resource used for sending the service data in each service data transmission opportunity, and may have the following implementation manners, including:

The first terminal may randomly select, from the service resource pool, a time-frequency resource for transmitting service data in each service data transmission opportunity.

The second terminal sends a scheduling request to the base station, and receives a time-frequency resource configured by the base station to transmit service data in each service data transmission opportunity. The base station is configured by the base station randomly selected from the service resource pool or The time-frequency resource randomly selected by the base station from the idle time-frequency resources included in the service resource pool.

Third, the first terminal randomly selects a time-frequency resource from the service resource pool as a time-frequency resource for transmitting service data in the first service data transmission opportunity, or sends a scheduling request to the base station and receives the configuration of the base station. The time-frequency resource used for transmitting the service data in the primary service data transmission opportunity, and then determined to be used in other each service data transmission opportunity according to the time-frequency resource used for transmitting the service data in the first service data transmission opportunity. Time-frequency resources for sending business data. Specific determination process It will be described in detail in the following corresponding embodiments, and will not be specifically described herein.

For the first terminal and the second terminal, the terminal structure of the two terminals may be a terminal structure of the terminal 200 as shown in FIG. 2, and the terminal 200 may be a mobile phone or a tablet computer or an in-vehicle terminal, etc., and includes at least a transceiver 201, A processor 202 having one or more processing cores and a memory 203 including one or more computer readable storage media are included.

The processor 202 may be configured to perform the foregoing process of acquiring time-frequency resources for transmitting SA information in each SA transmission opportunity, and acquiring a time-frequency resource for transmitting service data in each service data transmission opportunity, and The process of generating SA information, and the like.

The memory 203 can be used to store the foregoing SA resource pool, the service resource pool, the service data to be sent, the SA information generated by the processor 202, the intermediate result generated by the runtime, and the like.

The transceiver 201 can be configured to perform the foregoing process of sending a scheduling request to a base station and receiving time-frequency resources configured by the base station, and performing a process of transmitting SA information and service data by using the acquired time-frequency resource.

It should be noted that the terminal 200 may include other components in addition to the above three components, and the processor 202, the memory 203, and the transceiver 201 may have other functions in addition to the functions described above.

For example, the terminal 200 may further include an input unit 204, a display unit 205, a sensor 206, an audio circuit 207, and a WiFi (Wireless Fidelity) module 208. It should be emphasized that those skilled in the art can understand that the terminal structure shown in FIG. 2 does not constitute a limitation on the terminal 200, may include more or less components than the illustration, or combine some components, or Different parts are arranged.

And, the transceiver 201 can also be used for receiving and transmitting signals during receiving or transmitting information or during a call, in particular, receiving downlink information of the base station and then processing it by one or more processors 202; The data is sent to the base station. Generally, the transceiver 201 includes, but is not limited to, an antenna, at least one amplifier, a tuner, one or more oscillators, a SIM (Subscriber Identity Module) card, a transceiver, a coupler, and an LNA (Low Noise Amplifier, Low noise amplifier), duplexer, etc. In addition, the transceiver 201 can also communicate with the network and other devices via wireless communication. The wireless communication may use any communication standard or protocol, including but not limited to GSM (Global System of Mobile communication), GPRS (General Packet Radio Service), CDMA (Code Division Multiple Access). , code division multiple access), WCDMA (Wideband Code Division Multiple Access, Wideband Code Division Multiple Access), LTE (Long Term Evolution), e-mail, SMS (Short Messaging Service), and the like.

The memory 203 can also be used to store software programs and modules, and the processor 202 can execute various functional applications and data processing by running software programs and modules stored in the memory 203. The memory 203 may mainly include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application required for at least one function (such as a sound playing function, an image playing function, etc.), and the like; the storage data area may be stored according to The data created by the use of the terminal 200 (such as audio data, phone book, etc.) and the like. Further, the memory 203 may include a high speed random access memory, and may also include a nonvolatile memory such as at least one magnetic disk storage device, flash memory device, or other volatile solid state storage device. Accordingly, memory 203 may also include a memory controller to provide access to memory 203 by processor 202 and input unit 204.

Input unit 204 can be used to receive input numeric or character information, as well as to generate keyboard, mouse, joystick, optical or trackball signal inputs related to user settings and function controls. In particular, input unit 204 can include touch-sensitive surface 241 as well as other input devices 242. A touch-sensitive surface 241, also referred to as a touch display or trackpad, can collect touch operations on or near the user (eg, the user uses a finger, stylus, etc., on any suitable object or accessory on the touch-sensitive surface 241 or The operation near the touch-sensitive surface 241) and driving the corresponding connecting device according to a preset program. Alternatively, the touch-sensitive surface 241 can include two portions of a touch detection device and a touch controller. Wherein, the touch detection device detects the touch orientation of the user, and detects a signal brought by the touch operation, and transmits the signal to the touch controller; the touch controller receives the touch information from the touch detection device, converts the touch information into contact coordinates, and sends the touch information. The processor 202 is provided and can receive commands from the processor 202 and execute them. In addition, the touch sensitive surface 241 can be implemented in various types such as resistive, capacitive, infrared, and surface acoustic waves. In addition to the touch-sensitive surface 241, the input unit 204 can also include other input devices 242. Specifically, other input devices 242 may include, but are not limited to, one or more of a physical keyboard, function keys (such as volume control buttons, switch buttons, etc.), trackballs, mice, joysticks, and the like.

Display unit 205 can be used to display information entered by the user or information provided to the user and various graphical user interfaces of terminal 200, which can be constructed from graphics, text, icons, video, and any combination thereof. The display unit 205 can include a display panel 251. Alternatively, the display panel 251 can be configured in the form of an LCD (Liquid Crystal Display), an OLED (Organic Light-Emitting Diode), or the like. Further, the touch-sensitive surface 241 may cover the display panel 251, and when the touch-sensitive surface 241 detects a touch operation on or near it, it is transmitted to the location The processor 202 determines the type of touch event, and the processor 202 then provides a corresponding visual output on the display panel 251 based on the type of touch event. Although in FIG. 2, touch-sensitive surface 241 and display panel 251 are implemented as two separate components to implement input and input functions, in some embodiments, touch-sensitive surface 241 can be integrated with display panel 251 for input. And output function.

Terminal 200 includes at least one type of sensor 206, such as a light sensor, motion sensor, and other sensors. Specifically, the light sensor may include an ambient light sensor and a proximity sensor, wherein the ambient light sensor may adjust the brightness of the display panel 251 according to the brightness of the ambient light, and the proximity sensor may close the display panel 251 when the terminal 200 moves to the ear. / or backlight. As a kind of motion sensor, the gravity acceleration sensor can detect the magnitude of acceleration in each direction (usually three axes). When it is stationary, it can detect the magnitude and direction of gravity. It can be used to identify the attitude of the terminal (such as horizontal and vertical screen switching, related Game, magnetometer attitude calibration), vibration recognition related functions (such as pedometer, tapping), etc.; as for the terminal 200 can also be configured with gyroscopes, barometers, hygrometers, thermometers, infrared sensors and other sensors, here Let me repeat.

The audio circuit 207 includes a speaker 271 and a microphone 272, and the speaker 271 and the microphone 272 can provide an audio interface between the user and the terminal 200. The audio circuit 207 can transmit the converted electrical data of the received audio data to the speaker 271 for conversion to the sound signal output by the speaker 271; on the other hand, the microphone 272 converts the collected sound signal into an electrical signal by the audio circuit 207. After receiving, it is converted into audio data, and then processed by the audio data output processor 202, sent to the terminal, for example, via the transceiver 201, or the audio data is output to the memory 203 for further processing. The audio circuit 207 may also include an earbud jack to provide communication of the peripheral earphones with the terminal 200.

WiFi is a short-range wireless transmission technology, and the terminal 200 can help users to send and receive emails, browse web pages, and access streaming media through the WiFi module 208, which provides wireless broadband Internet access for users. Although FIG. 2 shows the WiFi module 208, it can be understood that it does not belong to the essential configuration of the terminal 200, and may be omitted as needed within the scope of not changing the essence of the invention.

The processor 202 is the control center of the terminal 200, which connects various parts of the entire terminal using various interfaces and lines, by running or executing software programs and/or modules stored in the memory 203, and calling data stored in the memory 203, The various functions and processing data of the terminal 200 are performed, thereby performing overall monitoring of the terminal 200. Optionally, the processor 202 can integrate an application processor and a modem processor, wherein the application processor mainly processes an operating system, a user interface, an application, and the like, and the modem processor mainly processes the wireless communication. It can be understood that the above modem processor may not be integrated into the processor 202.

The terminal 200 also includes a power source 209 (such as a battery) for powering various components. Preferably, the power source 209 can be logically coupled to the processor 202 through a power management system to manage functions such as charging, discharging, and power management through the power management system. . Power supply 209 may also include any one or more of a DC or AC power source, a recharging system, a power failure detection circuit, a power converter or inverter, a power status indicator, and the like.

Although not shown, the terminal 200 may further include a camera, a Bluetooth module, and the like, and details are not described herein again. Specifically, in this embodiment, the transceiver 201 and the processor 202 of the terminal 200 may also have the following functions:

Optionally, the transceiver 201 is configured to acquire resource information of a first time-frequency resource, where the first time-frequency resource is a time domain resource and a frequency used for transmitting SA information in the first scheduled allocation SA transmission opportunity. a domain resource, where the resource information is transmission resource index information of the first time-frequency resource or time domain resource location information and frequency domain resource location information of the first time-frequency resource; acquiring the first time-frequency resource Index information of the carrier where the frequency domain resource is located;

The processor 202 is configured to determine, according to the resource information and the index information of the carrier, a second time-frequency resource, where the second time-frequency resource is used to send the SA information in another SA transmission opportunity. Domain resources and frequency domain resources.

Optionally, the transceiver 201 is further configured to acquire time domain resource location information and frequency domain resource location information of the third time-frequency resource, where the third time-frequency resource is sent in the first service data transmission opportunity. Time domain resources and frequency domain resources used by the service data corresponding to the SA information;

The processor 202 is further configured to determine, according to the index information of the carrier, the time domain resource location information of the third time-frequency resource, and the frequency domain resource location information, the fourth time-frequency resource, where the fourth time-frequency resource is used. A resource is a time domain resource and a frequency domain resource used to transmit the service data within other service data transmission opportunities.

The total number of SA transmission opportunities for transmitting the SA information and the total number of service data transmission opportunities for transmitting the service data corresponding to the SA information are both N, N being an integer greater than or equal to 1;

And, the time domain resource used for transmitting the SA information in the nth SA transmission opportunity is the same as the time domain resource used for transmitting the service data in the nth service data transmission opportunity, n=1, 2...N ;

Optionally, the transceiver 201 is further configured to acquire a frequency domain resource used to send the service data in the nth service data transmission opportunity;

The processor 202 is further configured to determine a time domain resource used for transmitting SA information in the nth SA transmission opportunity as a time domain resource for transmitting the service data in the nth service data transmission opportunity. source.

Optionally, the transceiver 201 is configured to acquire, at the nth service data transmission opportunity, from a start location or an end location of a frequency domain resource used to send the SA information in the nth SA transmission opportunity. A frequency domain resource for transmitting the service data.

Optionally, the processor 202 is configured to determine, according to the resource information, a frequency domain resource that is included in the second time-frequency resource, and determine the second time-frequency according to the resource information and the index information of the carrier. Time domain resources included in the resource.

Optionally, when the resource information of the first time-frequency resource is the transmission resource index information,

The processor 202 is configured to determine, by using the following formula, a time domain resource b2 included in the second time-frequency resource;

为预设的资源池中或者由基站配置的资源池中包括的频域资源的数目，n_c为所述载波的索引信息，L_PSCCH为所述资源池中包括的时域资源的数目。In the above formula, n _PSCCH is the transmission resource index information,

For the preset resource pool or the number of frequency domain resources included in the resource pool configured by the base station, n _c is index information of the carrier, and L _PSCCH is the number of time domain resources included in the resource pool.

Optionally, when the resource information of the first time-frequency resource is time domain resource location information and frequency domain resource location information of the first time-frequency resource, the processor 202 has the following four implementation manners, including :

First, the processor 202 is configured to determine, by using the following formula, a time domain resource j(n) included in the second time-frequency resource;

j(n)=mod(j(1)+i(1)*(n-1)+M*(c-1),T)+T*(n-1)

In the above formula, i(1) is the frequency domain resource location information, j(1) is the time domain resource location information, and M is a frequency domain included in a preset resource pool or a resource pool configured by a base station. The number of resources, T is the ratio of the number of time domain resources included in the resource pool configured in the preset resource pool or configured by the base station to N, and N is the total number of SA transmission opportunities included in one transmission period, where n is the first The number of times of any SA transmission opportunity other than the secondary SA transmission opportunity, n is 2, 3, ..., N, and c is the index information of the carrier.

Second, the processor 202 is further configured to determine, by using the following formula, a time domain resource j(n) included in the second time-frequency resource;

j(n)=mod(j(1)+i(1)*(n-1+c-1)+M*(c-1),T)+T(n-1)

The parameters appearing in the above formula are the same as those appearing in the first implementation, and will not be described in detail herein.

Third, the processor 203 is configured to determine, by using the following formula, that the second time-frequency resource includes Time domain resource j(n);

j(n)=mod(j(1)+i(1)*(n-1)+M*(c-1),T)+mod(T*(n-1),T*N)

In the above formula, n is 2, 3, ..., N*S, where S is the number of transmission periods in which the SA information is transmitted, and other parameters appearing, such as i(1), j(1), M, etc. The parameters in the first implementation are the same and will not be described in detail herein.

a fourth, the processor, configured to determine, by using the following formula, a time domain resource j(n) included in the second time-frequency resource;

j(n)=mod(j(1)+i(1)*(n-1+c-1)+M*(c-1),T)+mod(T*(n-1),T* N)

In the above formula, n is 2, 3, ..., N*S, where S is the number of transmission periods in which the SA information is transmitted, and other parameters appearing, such as i(1), j(1), M, etc. The parameters in the first implementation are the same and will not be described in detail herein.

In the embodiment of the present invention, when determining that the terminal sends the time-frequency resource of the SA information, the carrier index information of the carrier used by the terminal is introduced, so that the other SA may be determined according to the resource information of the first time-frequency resource and the carrier index information. The time-frequency resource used for transmitting the SA information in the transmission opportunity ensures that any two terminals using different carriers have at least one SA transmission opportunity to transmit SA information in different time domain resources, so that both parties can receive the SA information of the other party.

The embodiment of the invention provides a method for determining a time-frequency resource. The method is to determine, by the first terminal, a time-frequency resource for transmitting the SA information to the second terminal, so that the first terminal sends the SA information to the second terminal by using the determined time-frequency resource.

The first terminal sends the SA information to the second terminal twice in one transmission period, that is, the first SA transmission opportunity and the second SA transmission opportunity exist in one transmission period for the first terminal to send the SA information. .

The method provided in this embodiment may be used to determine a time-frequency resource used by the first terminal to send SA information to the second terminal in the first SA transmission opportunity and the second SA transmission opportunity, respectively. Referring to Figure 3-1, the method includes:

Step 301: Acquire transmission resource index information of the first time-frequency resource, where the first time-frequency resource is a time-frequency resource used by the first terminal to send SA information in the first SA transmission opportunity.

Optionally, the first terminal has the following two implementation manners to obtain the transmission resource index information of the first time-frequency resource, including:

First, the first terminal selects the first SA transmission from the SA resource pool used to send the SA information. Transmission resource index information of the first time-frequency resource for transmitting SA information in the transmission.

The SA resource pool includes a plurality of time-frequency resources for transmitting SA information, and the first terminal may randomly select a transmission resource index information of a time-frequency resource from the SA resource pool, and serve as the transmission resource index information of the first time-frequency resource.

The SA resource pool includes multiple time domain resources and multiple frequency domain resources. The combination of any time domain resource and any frequency domain resource constitutes one time-frequency resource in the SA resource pool. The transmission resource index information of the time-frequency resource may be The number of the time-frequency resource in the SA resource pool. For example, referring to Figure 3-2, the SA resource pool includes four frequency domain resources and ten time domain resources. The four frequency domain resources and the ten time domain resources constitute 40 time-frequency resources, which are time-frequency respectively. The resource 0, 1, ..., 39, time-frequency resources 0, 1, ... 39 transmission resource index information may be 0, 1, ... 39, respectively.

The second terminal receives the transmission resource index information of the first time-frequency resource used by the base station for transmitting the SA information in the first SA transmission opportunity configured by the base station.

The specific configuration process may be: the first terminal may send a scheduling request to the base station, and the base station receives the scheduling request, and randomly selects a time-frequency resource or a preset SA resource from the preset SA resource pool or the SA resource pool configured by the base station. A time-frequency resource is randomly selected from the idle time-frequency resources included in the SA resource pool configured by the pool or the base station, and the transmission resource index information of the time-frequency resource is sent to the first terminal, and the first terminal receives the transmission resource index information of the time-frequency resource. And as the transmission resource index information of the first time-frequency resource used for transmitting the SA information in the first SA transmission opportunity.

n_PSCCH为第一时频资源的传输资源索引信息，

为SA资源池中包括的频域资源的数目，L_PSCCH为SA资源池中包括的时域资源的数目，

为向下取整运算，例如，

等于2。Optionally, the value of the transmission resource index information of the first time-frequency resource selected by the first terminal or the transmission resource index information of the first time-frequency resource configured by the base station is:

n _PSCCH is the transmission resource index information of the first time-frequency resource,

For the number of frequency domain resources included in the SA resource pool, L _PSCCH is the number of time domain resources included in the SA resource pool.

Rounding down the operation, for example,

Equal to 2.

It should be noted that there may be multiple terminals, and the multiple terminals use different carriers, so that the transmission resource index information of the first time-frequency resource acquired by the multiple terminals may be the same.

For example, referring to Figure 3-3, the SA resource pool configuration is the same as that of Figure 3-2. The transmission resource index information is also the same as Figure 3-2. There are four terminals in the figure, namely terminals A, B, C, and D. Terminals A and B use carrier 1 and use two different frequency domain resources included in carrier 1, respectively. Terminals C and D use carrier 2, respectively using two different frequency domain resources included in carrier 2. The transmission resource index information of the first time-frequency resource acquired by the terminals A and C is the same and both are 0, and the transmission resource index information of the first time-frequency resource acquired by the terminals B and D is also the same and both are 10.

Step 302: Determine, according to the transmission resource index information, a first time-frequency resource.

Specifically, according to the transmission resource index information, the frequency domain resource a1 included in the first time-frequency resource is determined by the following formula (1-1);

In the above formula (1-1), the range of values of n _PSCCH is:

Determining, according to the transmission resource index information, the time domain resource b1 included in the first time-frequency resource by using the following formula (1-2);

B1=n _PSCCH modL _PSCCH ......(1-2);

In the above formula (1-2), mod is a modulo operation, for example, 3 mod2 is equal to 1.

In this embodiment, there may be two terminals, and the time-domain resources included in the first time-frequency resources acquired by the two terminals may be the same, so that the two terminals are in the same time. The SA information is sent simultaneously in the first SA transmission opportunity, and neither party receives the SA information of the other party.

通过上述公式(1-2)确定出时域资源为b1＝0 mod 10＝0。同理，终端B根据其获取的传输资源索引信息10确定的频域资源为1，时域资源为0，终端C根据其获取的传输资源索引信息0确定的频域资源为0，时频域资源为0，以及终端D根据其获取的传输资源索引信息10确定的频域资源为1，时域资源为0，终端A、B、C、D均在第一次SA传输机会内均在时域资源0上发送SA信息，使得各自接收不到对方的SA信息。For example, as shown in FIG. 3-3, the number of time domain resources included in the SA resource pool is 10. For the terminal A, according to the obtained transmission resource index information 0, the frequency domain resource is determined by using the above formula (1-1).

The time domain resource is determined by the above formula (1-2) as b1=0 mod 10=0. Similarly, the frequency domain resource determined by the terminal B according to the obtained transmission resource index information 10 is 1 and the time domain resource is 0. The frequency domain resource determined by the terminal C according to the obtained transmission resource index information 0 is 0, and the time-frequency domain is 0. The resource is 0, and the frequency domain resource determined by the terminal D according to the obtained transmission resource index information 10 is 1, the time domain resource is 0, and the terminals A, B, C, and D are all in the first SA transmission opportunity. The SA information is transmitted on the domain resource 0 so that the SA information of the other party is not received.

Step 303: Acquire index information of a carrier where the frequency domain resource of the first time-frequency resource is located.

The index information of each carrier may be the location number of each carrier, and may be configured by a base station or preset by a technician. The carrier of the frequency domain resource of the first time-frequency resource is substantially the carrier used by the first terminal.

For example, suppose the index information of carrier 1 is 1, the index information of carrier 2 is 2, and terminal A and terminal B use carrier 1, so the index information of carriers acquired by terminals A and B respectively is 1; terminal C and terminal D use Carrier 2, so the index information of the carriers acquired by terminals C and D respectively is 2.

Step 304: Determine, according to the transmission resource index information and the index information of the carrier, the time domain resource b2 used by the first terminal to send the SA information in the second SA transmission opportunity according to the following formula (1-3).

为SA资源池中包括的频域资源的数目，n_c为该载波的索引信息。In the above formula (1-3),

For the number of frequency domain resources included in the SA resource pool, n _{c is} the index information of the carrier.

If the two terminals use different carriers and the transmission resource index information of the first time-frequency resource acquired by the two terminals is the same, the two terminals use different carriers, that is, the indexes of the carriers acquired by the two terminals. The information is different. It is determined by the above formula (1-3) that the time domain resources used by the two terminals to transmit SA information in the second SA transmission opportunity will be different, so that the two are within the second SA transmission opportunity. The terminals send SA information in different time domain resources, so that the two terminals can receive the SA information sent by the other party in the second SA transmission opportunity.

If two terminals use the same carrier, and the time domain resources of the first time-frequency resource acquired by the two terminals are the same but the transmission resource index information of the first time-frequency resource is different, the above formula (1-3) is adopted. Determining that the time domain resources used by the two terminals to transmit SA information in the second SA transmission opportunity are different, so that the two terminals send SA information in different time domain resources in the second SA transmission opportunity. So that the two terminals can receive the SA information sent by the other party within the second SA transmission opportunity.

为4。For example, if the SA resource pool is as shown in Figure 3-2, the number of time domain resources included in the SA resource pool is 10, and the number of frequency domain resources is 4, that is, L _PSCCH is 10.

Is 4.

The terminal A determines, according to the transmission resource index information 0 and the index information 1 of the carrier, the time domain resource used for transmitting the SA information in the second SA transmission opportunity as the time domain resource by using the above formula (1-3). 1, the specific determination process is as follows:

Similarly, the terminal B determines, according to the obtained transmission resource index information 10 and the index information 1 of the carrier, the time domain resource used for transmitting the SA information in the second SA transmission opportunity by using the above formula (1-3). The time domain resource 2; the terminal C determines, according to the transmission resource index information 0 and the carrier index information 2, the time domain for transmitting the SA information in the second SA transmission opportunity according to the above formula (1-3) The resource is the time domain resource 3; the terminal D determines, according to the transmission resource index information 10 and the carrier index information 2 obtained by the terminal D, the above-mentioned formula (1-3), which is used for transmitting the SA information in the second SA transmission opportunity. The time domain resource is time domain resource 4.

Referring to FIG. 3-3, the terminals A, B, C, and D respectively send SA information in different time domain resources in the second SA transmission opportunity, so that the terminals A, B, C, and D transmit in the second SA. The SA information that the other party sends can be received from each other within the opportunity.

The time domain resource b2 used by the first terminal to send the SA information in the second SA transmission opportunity is obtained, and the frequency domain resource used for sending the SA information by the first terminal is also determined. A second time-frequency resource for transmitting SA information in the second SA transmission opportunity, and the specific acquisition process is as follows.

Step 305: Determine, according to the obtained transmission resource index information, the frequency domain resource a2 used by the first terminal to send the SA information in the second SA transmission opportunity according to the following formula (2).

The meaning of each parameter in the formula (2) is the same as that of the formula (1-3), and will not be described in detail herein.

The determined time domain resource b2 and the frequency domain resource a2 may be used to form a second time-frequency resource for the first terminal to send the SA information in the second SA transmission opportunity, so that the first terminal acquires the first and second Time-frequency resources for transmitting SA information within the secondary SA transmission opportunity.

For example, referring to FIG. 3-3, the terminal A determines, according to the transmission resource index information 0 obtained by the terminal A, the frequency domain resource 2 used for transmitting the SA information in the second SA transmission opportunity according to the above formula (2); The transmission resource index information 10 determines the frequency domain resource 3 used for transmitting the SA information in the second SA transmission opportunity by using the above formula (2); and the terminal C passes the above formula (2) according to the transmission resource index information 0 acquired by the terminal C. Determining the frequency domain resource 2 used for transmitting the SA information in the second SA transmission opportunity; the terminal D determines, according to the transmission resource index information 10 obtained by the terminal, the second SA transmission opportunity for transmitting the SA information by using the above formula (2) Frequency domain resources 3.

The first terminal further sends the service data corresponding to the SA information to the second terminal, and the number of times the service data is repeatedly sent is at least once, that is, at least one service data transmission opportunity exists to send the service data. For example, it can be two, four or six times.

Further, the first terminal also needs to acquire time-frequency resources for transmitting service data in each service data transmission opportunity. The obtaining process can be performed before, after or at the same time as any of the above steps. The specific obtaining process is as follows:

The first terminal randomly selects time-frequency resources for transmitting service data in each service data transmission opportunity from a preset service resource pool configured by the base station, or sends a scheduling request to the base station, and the receiving base station configures each Time-frequency resources used to transmit service data within the secondary service data transmission opportunity.

The service data transmission opportunity for the first terminal to send the service data to the second terminal is many, usually four times of service data transmission opportunity or six times of service data transmission opportunity, etc., so that for any two terminals, the two terminals randomly select The time-frequency resources used for transmitting the service data in each service data transmission opportunity have the same probability that the time-domain resources are the same, so the first terminal randomly selects the time-frequency resources.

Further, after acquiring the time-frequency resource for transmitting the service data in each service data transmission opportunity, the first terminal may further generate the time-frequency resource for transmitting the service data in each service data transmission opportunity. SA information corresponding to the service data.

Optionally, after acquiring the time-frequency resource for sending the SA information and the service data, the first terminal sends the SA information to the second terminal by using the first time-frequency resource and the second time-frequency resource in the SA resource pool. Then, the service data is sent to the second terminal in the service resource pool by using the time-frequency resource for transmitting the service data in each service data transmission opportunity.

It should be noted that, when two terminals use different carriers, if there is a large guard band between the carriers used by the two terminals, for example, greater than a preset threshold, the two terminals are even within the same time domain resource. The SA information is sent, and the SA information of the other party can also be received. If there is a small guard band between the carriers used by the two terminals, for example, less than or equal to a preset threshold, or the carriers used by the two terminals are adjacent to each other. If the two terminals send the SA information in the same time domain resource, the two terminals do not receive the SA information sent by the other party, and the method needs to be solved by the method provided in this embodiment.

In the embodiment of the present invention, when determining that the terminal sends the time domain resource of the SA information, the carrier index information of the carrier used by the terminal is introduced, so that the first time frequency used for transmitting the SA information in the first SA transmission opportunity may be used. The resource transmission index information of the resource and the carrier index information determine the time domain resource used for transmitting the SA information in the second SA transmission opportunity, and ensure that any two terminals using different carriers have at least one SA transmission opportunity in different time domains. The SA information is sent in the resource, so that both parties can receive the SA information of the other party to ensure that the communication between the two terminals can be performed normally.

The embodiment of the invention provides a method for determining a time-frequency resource. The method is to determine, by the first terminal, a time-frequency resource for transmitting the SA information to the second terminal, so that the first terminal sends the SA information to the second terminal on the determined time-frequency resource.

The number of times the first terminal sends the SA information to the second terminal in one transmission period is at least once, denoted as N, N is an integer value greater than or equal to 1, and may be, for example, a value of 1, 2, 3, 4 or 5. In addition, the D2D system may define that the first terminal transmits the SA information in one or more transmission periods, and the number of times the SA information is transmitted in each transmission period is still N times. The number of transmission periods in which the SA information is transmitted is denoted as S, and S is an integer value greater than or equal to 1, and may be, for example, a value of 1, 2, 3, 4, or 5.

When S is 1, the number of times that the first terminal repeatedly sends SA information is N times, that is, there are N SA transmission opportunities; when S is greater than 1, the number of times the first terminal repeatedly sends SA information is N*S times, that is, N*S SA transmission opportunities.

The method provided in this embodiment may determine a time-frequency resource used by the first terminal to send SA information in each SA transmission opportunity. Referring to Figure 4-1, the method includes:

Step 401: Acquire time domain resource location information and frequency domain resource location information included in the first time-frequency resource, where the first time-frequency resource is a time-frequency resource used to send SA information in the first SA transmission opportunity.

Optionally, the first terminal has the following two implementation manners: acquiring time domain resource location information and frequency domain resource location information included in the first time-frequency resource, including:

First, the first terminal selects time domain resource location information and frequency domain resource location information included in the first time-frequency resource used for transmitting the SA information in the first SA transmission opportunity from the SA resource pool for transmitting the SA information. .

The time domain resource location information may be a time domain location number of the time domain resource in a single SA transmission of the SA resource pool. For example, suppose the SA resource pool includes time domain resources 0, 1, . . . 39, and there are 4 in the resource pool. For the secondary SA transmission opportunity, the time domain resource location numbers of the single SA transmission are 0, 1, ... 9, and the location numbers of the time domain resources 0, 1, ... 39 may be 0, 1, ..., respectively.

The frequency domain resource location information is the location number of the frequency domain resource in the SA resource pool. For example, suppose the SA resource pool includes the frequency domain resources 0, 1, 2, and 3, and the frequency domain resource 0, 1, 2, and 3 location numbers. Can be 0, 1, 2, 3 respectively.

The second terminal receives the time domain resource location information and the frequency domain resource location information included in the first time-frequency resource used by the base station for transmitting the SA information in the first SA transmission opportunity configured by the base station.

The time domain resource location information may be a time domain location number of the time domain resource in a single SA transmission of the SA resource pool. For example, suppose the SA resource pool includes time domain resources 0, 1, ... 39, and there are 4 times in the resource pool. For SA transmission, the time domain resource location numbers of a single SA transmission are 0, 1, ... 9, and the time domain resources 0, 1, ..., 39 can be 0, 1, ..., 39, respectively.

The frequency domain resource location information is the location number of the frequency domain resource in the SA resource pool. For example, suppose the SA resource pool includes the frequency domain resources 0, 1, 2, and 3, and the frequency domain resource 0, 1, 2, and 3 location numbers. Can be 0, 1, 2, 3 respectively.

It should be noted that the first time-frequency resources acquired by the multiple terminals may include the same time domain resources, that is, the multiple terminals send SA information in the same time domain resource in the first SA transmission opportunity. The plurality of terminals cannot receive the SA information of the other party in the first SA transmission opportunity.

For example, referring to FIG. 4-2, there are four terminals, namely, terminals A, B, C, and D, and terminals A and B use carrier 1, respectively, using two different frequency domain resources included in carrier 1. Terminals C and D Using carrier 2, two different frequency domain resources included in carrier 2 are used, respectively. The first time-frequency resources acquired by the terminals A, B, C, and D all include the time domain resource 0, that is, the time domain resource location information included in the first time-frequency resource acquired by the terminals A, B, C, and D is 0, and the terminal is A, B, C, and D all send SA information in time domain resource 0 in the first SA transmission opportunity, so terminals A, B, C, and D cannot receive each other in the first SA transmission opportunity. SA information. The first time-frequency resources acquired by the terminals A and C include the same frequency domain resource location information and are both 0. The frequency domain resource location information included in the first time-frequency resources acquired by the terminals B and D is also the same and both are 1.

Step 402: Acquire index information of a carrier where a frequency domain resource of the first time-frequency resource is located.

The carrier of the frequency domain resource of the first time-frequency resource is substantially the carrier used by the first terminal. For example, suppose the index information of carrier 1 is 1, the index information of carrier 2 is 2, and the terminal 1 and B use carrier 1, so the index information of the carriers acquired by terminals A and B respectively is 1; the terminals 2 and B use carrier 2 Therefore, the index information of the carriers acquired by the terminals C and D respectively is 2.

Step 403: Determine, according to the acquired time domain resource location information, the frequency domain resource location information, and the index information of the carrier, the time domain resource j(n) used by the first terminal to send the SA information in the nth SA transmission opportunity.

The time domain resource j(n) used by the first terminal to transmit the SA information in the nth SA transmission opportunity may be determined by the resource determination formula, and the resource determination formula has the following four formulas (3) to (6), the formula ( 3) and (6) are only four specific embodiments given by the present invention, and other formulas can achieve the same purpose, and the solution of the present invention is not limited to the formulas (3) and (6).

In this embodiment, the value of S may be 1 or an integer value greater than 1.

When S is 1, that is, the SA information is sent in one transmission period, and the SA transmission opportunity for transmitting the SA information is N times, and the value of n is 2, 3, ... N, in which case the formula (3) can be passed. Or (4), determining a time domain resource j(n) used by the first terminal to transmit SA information in the nth SA transmission opportunity. It is divided into the following first and second implementations, including:

First, determining, by using the following formula (3), a time domain resource j(n) used by the first terminal to transmit SA information in the nth SA transmission opportunity;

j(n)=mod(j(1)+i(1)*(n-1)+M*(c-1), T)+T*(n-1)......(3);

In the above formula (3), M is the number of frequency domain resources included in the SA resource pool, T is the ratio of the number of time domain resources included in the SA resource pool to N, and N is a transmission opportunity included in one transmission period. The total number, c is the obtained index information, i(1) is the obtained frequency domain resource location information, and j(1) is obtained. Time domain resource location information.

Where mod is a modulo operation, for example, mod(3, 2) is equal to 1.

Second, determining, by using the following formula (4), the time domain resource j(n) used by the first terminal to transmit SA information in the nth SA transmission opportunity;

j(n)=mod(j(1)+i(1)*(n-1+c-1)+M*(c-1), T)+T(n-1) (4);

The meaning of each parameter in the above formula (4) is the same as that of the formula (3), and will not be described in detail herein.

If the two terminals use different carriers and the first time-frequency resources acquired by the two terminals include the same time domain resource location information and frequency domain resource location information, the index information of the carriers acquired by the two terminals is different. By using the above formula (3) or (4), respectively, it is determined that the time domain resources used by the two terminals to transmit SA information in the nth SA transmission opportunity will be different, so that the two are within the nth SA transmission opportunity. The terminals send SA information in different time domain resources, so that the two terminals can receive the SA information sent by the other party in the nth SA transmission opportunity.

If two terminals use the same carrier, and the first time-frequency resources acquired by the two terminals include the same time domain resource location information but the included frequency domain resource location information is different, the frequency domain resource location information is different, Equation (3) or (4) respectively determines that the time domain resources used by the two terminals to transmit SA information in the nth SA transmission opportunity will be different, so that the two terminals are in the nth SA transmission opportunity. The SA information is sent in different time domain resources, so that the two terminals can receive the SA information sent by the other party in the nth SA transmission opportunity.

For example, the number of time domain resources included in the SA resource pool is 40, and the number of frequency domain resources is 4, that is, M is 4. Assuming that the total number N of transmission opportunities included in one transmission period is 4, then T is a time domain resource. The ratio between the number 40 and the total number 4 is 10. In this way, the terminal A determines, according to the time domain resource location information 0, the frequency domain resource location information 0, and the index information 1 acquired by the terminal A, by using the above formula (4), when it is used to transmit the SA information in the second SA transmission opportunity. The domain resource is the time domain resource 10, and the time domain resource for transmitting the SA information is the time domain resource 20 in the third SA transmission opportunity, and the time domain resource for transmitting the SA information in the fourth SA transmission opportunity. For time domain resource 30.

Similarly, the time domain resources used by the terminal B to transmit SA information in the second, third, and fourth SA transports are time domain resources 11, 22, and 33, respectively; 2. The time domain resources for transmitting SA information in the third and fourth SA transmissions are time domain resources 14, 24, 34, respectively; the second, third and fourth SA transmissions determined by terminal D The time domain resources used to transmit SA information in the machine are time domain resources 16, 27, 38, respectively. See Figure 4-2, so terminals A, B, C, D At least one SA transmission opportunity exists between each other to transmit SA information in different time domain resources, so that the terminals A, B, C, and D can mutually receive the SA information sent by the other party in at least one SA transmission opportunity.

When S is an integer greater than 1, that is, SA information is transmitted in S transmission periods, the SA transmission opportunity for transmitting SA information is N*S times, and the value of n is 2, 3, ..., N*S, in this case In the case, the time domain resource j(n) used by the first terminal to transmit the SA information in the nth SA transmission opportunity may be determined by the formula (5) or (6). It is divided into the following three and four implementations, including:

Third, determining, by using the following formula (5), the time domain resource j(n) used by the first terminal to transmit SA information in the nth SA transmission opportunity;

j(n)=mod(j(1)+i(1)*(n-1)+M*(c-1),T)+mod(T*(n-1),T*N)...... (5);

The meaning of each parameter in the above formula (5) is the same as that of the formula (3), and will not be described in detail herein.

Fourth, determining, by using the following formula (5), a time domain resource j(n) used by the first terminal to transmit SA information in the nth SA transmission opportunity;

j(n)=mod(j(1)+i(1)*(n-1+c-1)+M*(c-1),T)+mod(T*(n-1),T* N)......(6)

The meaning of each parameter in the above formula (6) is the same as that of the formula (3), and will not be described in detail herein.

By the third or fourth manner described above, the obtained j(1), j(2), ..., j(N) are N time domain resources in the first transmission period; j(N+1), j( N+2)...j(2*N) is the N time domain resources in the second transmission period, ..., and j(N*(S-1)+1), j(N*(S- 2) +2) ... j(N*S) are N time domain resources in the Sth transmission period.

In this step, the time domain resource j(n) used by the first terminal to send the SA information in the nth SA transmission opportunity is obtained, and the frequency domain resource used for the first terminal to send the SA information needs to be determined, so that The nth time-frequency resource used for transmitting the SA information in the nth SA opportunity can be formed. The specific acquisition process is as follows.

Step 404: Determine, according to the obtained frequency domain resource location information, a frequency domain resource i(n) used by the first terminal to send SA information in the nth SA transmission opportunity according to the following formula (7).

i(n)=mod(i(1)+k*(n-1), M)......(7);

In the above formula (7), k is a constant, k=0, 1, 2 or 3, and the other parameters in the formula (7) have the same meanings as the formula (3), and will not be described in detail herein.

In addition to obtaining the frequency domain resource i(n) in the above manner, there may be other manners, for example, it may be obtained by using a frequency hopping method for uplink data transmission in an LTE (Long Term Evolution) system. Not limited.

Wherein, in the formula (7), the values of n are 1, 2, ..., N*S. Where i(1), i(2)...i(N) are N frequency domain resources in the first transmission period; i(N+1), i(N+2)...i(2* N) is the N frequency domain resources in the second transmission period, ..., and i(N*(S-1)+1), i(N*(S-2)+2)...i(N *S) is the N frequency domain resources in the Sth transmission period.

The determined time domain resource j(n) and the frequency domain resource i(n) may be configured to be used for the nth time-frequency resource sent by the first terminal in the nth SA transmission opportunity, so that the first terminal repeats the foregoing 403 and The process of 404 obtains time-frequency resources for transmitting SA information within the first to Nth SA transmission opportunities.

The first terminal further sends the service data corresponding to the SA information to the second terminal. And the number of times of repeatedly transmitting the service data in one transmission period is at least one time, denoted as P, P is an integer value greater than or equal to 1, and may be, for example, a value of 1, 2, 3, 4 or 5. In addition, the service data can be transmitted in one or more transmission cycles, and the number of times the service data is transmitted in each transmission cycle is still P times. The number of transmission periods in which the service data is transmitted is denoted as R, and R is an integer value greater than or equal to 1, and may be, for example, a value of 1, 2, 3, 4, or 5.

When R is 1, the number of times the first terminal repeatedly sends service data is P times, that is, there are P service data transmission opportunities; when R is greater than 1, the number of times the first terminal sends service data is P*R times, that is, P*R business data transmission opportunities.

Further, the first terminal further acquires a time-frequency resource for transmitting service data within each service data transmission opportunity. The obtaining process may be performed before, after or simultaneously with any of the foregoing steps. The specific obtaining process is the same as the process of acquiring time-frequency resources for transmitting SA information in each SA transmission opportunity, that is, only SA needs to be used in the foregoing process. Replace the information with the service data, replace the SA transmission opportunity with the service data transmission opportunity, replace N with P, and replace S with R to obtain the specific acquisition process, which will not be described in detail here.

Optionally, in this embodiment, the nth SA transmission opportunity for transmitting SA information is the same as the nth service data transmission opportunity for transmitting service data, and the number of SA information transmissions in one transmission period at this time N is the same as the number of transmissions P of the service data. The number of transmission periods S of the SA information is the same as the number of transmission periods R of the service data. That is, the first terminal simultaneously transmits the SA information and the service data, and sends the SA in the nth SA transmission opportunity. The time domain resource used for the information is the same as the time domain resource used to transmit the service data in the nth service data transmission opportunity, but the frequency domain resource used for transmitting the SA information in the nth SA transmission opportunity is at the nth time The frequency domain resources used to transmit the service data within the service data transmission opportunity are different.

Optionally, in the case that the first terminal simultaneously sends the SA information and the service data, the nth SA is The frequency domain resource used for transmitting the SA information in the transmission opportunity may or may not be continuous with the frequency domain resource used for transmitting the service data in the nth service data transmission opportunity. For example, referring to FIG. 4-3 and 4-4, terminal A or terminal B simultaneously sends SA information and service data; as shown in FIG. 4-3, terminal A or terminal B is used to send frequency domain resources of SA information and used for The frequency domain resource for transmitting service data is discontinuous. Alternatively, as shown in Figure 4-4, the frequency domain resource used by terminal A or terminal B to transmit SA information and the frequency domain resource used for transmitting service data are consecutive.

In this manner, after the first terminal acquires the time-frequency resource for transmitting the SA information in the nth SA transmission opportunity according to the foregoing process, the first terminal may acquire the information used in the nth service data transmission opportunity as follows. Time-frequency resources for sending business data, including:

The first terminal selects, from the service resource pool, the frequency domain resource used for transmitting the service data in the nth service data transmission opportunity, and determines the time domain resource used for transmitting the SA information in the nth SA transmission opportunity to be respectively determined. A time domain resource for transmitting service data within the nth service data transmission opportunity.

When the frequency domain resource used for transmitting the SA information in the nth SA transmission opportunity and the frequency domain resource used for transmitting the service data in the nth service data transmission opportunity are consecutive, the SA may be transmitted from the nth SA transmission opportunity. The frequency domain resource used for transmitting the service data in the nth service data transmission opportunity is obtained from the start position or the end position of the frequency domain resource used for the information.

or,

After the first terminal acquires the time-frequency resource used for transmitting the service data in the nth service data transmission opportunity according to the foregoing process, the time-frequency resource used for transmitting the SA information in the n-th SA transmission opportunity may be acquired as follows: include:

The first terminal selects a frequency domain resource for transmitting SA information in the nth SA transmission opportunity from the SA resource pool, and determines a time domain resource used for transmitting the service data in the nth service data transmission opportunity as the nth The time domain resource used to transmit SA information within the secondary SA transmission opportunity.

When the frequency domain resource used for transmitting the SA information in the nth SA transmission opportunity and the frequency domain resource used for transmitting the service data in the nth service data transmission opportunity are consecutive, the service may be transmitted from the nth service data transmission opportunity. The frequency domain resource used for transmitting the SA information in the nth SA transmission opportunity is obtained from the start position or the end position of the frequency domain resource used by the data.

Optionally, in this embodiment, the first terminal may send the SA information and the service data in different transmission periods. In this manner, the first terminal needs to obtain the opportunity of each service data transmission by using the method provided in this embodiment. A time-frequency resource for transmitting service data. In addition, it should be noted that different terminals may send SA information and time-frequency resources in the same transmission period.

For example, referring to FIG. 4-5, there are three transmission periods. In the first transmission period, terminals A and B transmit SA information, terminals C and D transmit service data, and terminals A and B transmit service data in the second transmission period. Terminals C and D transmit SA information; in the third transmission period, terminals A and B transmit SA information, and terminals C and D transmit service data.

In the embodiment of the present invention, when determining that the terminal sends the time-frequency resource of the SA information, the carrier index information of the carrier used by the terminal is introduced, so that the time domain resource for the terminal to send the SA information in the first SA transmission opportunity may be used. The location information and the frequency domain resource location information and the carrier index information determine the time domain resource used for transmitting the SA information in the nth SA transmission opportunity, and ensure that any two terminals using different carriers have at least one SA transmission opportunity. At the same time, the SA information is sent in the domain resource, so that both parties can receive the SA information of the other party to ensure normal communication.

Referring to FIG. 5, an embodiment of the present invention provides an apparatus 500 for determining a time-frequency resource, where the apparatus 500 includes: a receiving unit 501 and a processing unit 502;

The receiving unit 501 is configured to acquire resource information of the first time-frequency resource, where the first time-frequency resource is a time domain resource and a frequency domain resource used for transmitting the SA information in the first scheduled allocation SA transmission opportunity, where the resource The information is the transmission resource index information of the first time-frequency resource or the time domain resource location information and the frequency domain resource location information of the first time-frequency resource; and acquiring the frequency domain resource in the first time-frequency resource Carrier index information;

The processing unit 502 is configured to determine, according to the resource information and the index information of the carrier, a second time-frequency resource, where the second time-frequency resource is a time domain resource used for sending the SA information in another SA transmission opportunity. And frequency domain resources.

Alternatively, the receiving unit 501 may be a receiver, or the transceiver 201 included in the foregoing terminal 200 or a hardware circuit structure included in the transceiver 201 for receiving data. The processing unit 502 can be the processor 202 included in the aforementioned terminal 200.

Optionally, the receiving unit 501 is further configured to acquire time domain resource location information and frequency domain resource location information of the third time-frequency resource, where the third time-frequency resource is sent in the first service data transmission opportunity. Time domain resources and frequency domain resources used by the business data;

The determining module 502 is further configured to determine, according to the index information of the carrier, the time domain resource location information of the third time-frequency resource, and the frequency domain resource location information, the fourth time-frequency resource, where the fourth time-frequency resource A resource is a time domain resource and a frequency domain resource used to transmit the service data within other service data transmission opportunities.

The total number of SA transmission opportunities for transmitting the SA information and the total number of service data transmission opportunities for transmitting the service data corresponding to the SA information are both N, N being an integer greater than or equal to 1;

And, the time domain resource used for transmitting the SA information in the nth SA transmission opportunity is the same as the time domain resource used for transmitting the service data in the nth service data transmission opportunity, n=1, 2...N ;

The receiving unit 501 is further configured to acquire a frequency domain resource used to send the service data in the nth service data transmission opportunity;

The processing unit 502 is further configured to determine a time domain resource used for transmitting SA information in the nth SA transmission opportunity as a time domain resource used to send the service data in the nth service data transmission opportunity.

Optionally, the receiving unit 501 is configured to acquire, at an nth service data transmission opportunity, from a start location or an end location of a frequency domain resource used to send the SA information in the nth SA transmission opportunity. A frequency domain resource for transmitting the service data.

Optionally, the processing unit 502 is configured to determine, according to the resource information, a frequency domain resource that is included in the second time-frequency resource, and determine the second time-frequency according to the resource information and the index information of the carrier. Time domain resources included in the resource.

Wherein, when the resource information is the transmission resource index information of the first time-frequency resource,

The processing unit 502 is configured to determine, by using the following formula, a time domain resource b2 included in the second time-frequency resource;

为预设的资源池中或者由基站配置的资源池中包括的频域资源的数目，n_c为所述载波的索引信息，L_PSCCH为所述资源池中包括的时域资源的数目。In the above formula, n _PSCCH is the transmission resource index information,

The number of frequency domain resource is a predetermined resource pool or resource pool configured by the base station includes, n _c is an index of the information carrier, L _PSCCH is the number of time domain resources included in the resource pool.

When the resource information includes the time domain resource location information and the frequency domain resource location information of the first time-frequency resource, the processing unit 502 has the following four implementation manners, including:

First, the processing unit 502 is configured to determine, by using the following formula, a time domain resource j(n) included in the second time-frequency resource;

j(n)=mod(j(1)+i(1)*(n-1)+M*(c-1),T)+T*(n-1)

In the above formula, i(1) is the frequency domain resource location information, j(1) is the time domain resource location information, and M is a frequency domain included in a preset resource pool or a resource pool configured by a base station. The number of resources, T is the ratio of the number of time domain resources included in the resource pool in the preset resource pool or configured by the base station to N Value, N is the total number of SA transmission opportunities included in one transmission period, n is the number of any other SA transmission opportunities except the first SA transmission opportunity, n is 2, 3...N, and c is the carrier Index information.

Second, the processing unit 502 is configured to determine, by using the following formula, a time domain resource j(n) included in the second time-frequency resource;

j(n)=mod(j(1)+i(1)*(n-1+c-1)+M*(c-1),T)+T(n-1)

The parameters appearing in the above formula are the same as the parameters in the first implementation, and will not be described in detail herein.

The determining module 502 is configured to determine, by using the following formula, a time domain resource j(n) included in the second time-frequency resource;

j(n)=mod(j(1)+i(1)*(n-1)+M*(c-1),T)+mod(T*(n-1),T*N)

In the above formula, n is 2, 3, ..., N*S, where S is the number of transmission periods in which the SA information is transmitted, and other parameters appearing, such as i(1), j(1), M, etc. The parameters in the first implementation are the same and will not be described in detail herein.

Fourth, the determining module 502 is configured to determine, by using the following formula, a time domain resource j(n) included in the second time-frequency resource;

j(n)=mod(j(1)+i(1)*(n-1+c-1)+M*(c-1),T)+mod(T*(n-1),T* N)

In the above formula, n is 2, 3, ..., N*S, where S is the number of transmission periods in which the SA information is transmitted, and other parameters appearing, such as i(1), j(1), M, etc. The parameters in the first implementation are the same and will not be described in detail herein.

In the embodiment of the present invention, when determining that the terminal sends the time-frequency resource of the SA information, the carrier index information of the carrier used by the terminal is introduced, so that the other SA may be determined according to the resource information of the first time-frequency resource and the carrier index information. The time-frequency resource used for transmitting the SA information in the transmission opportunity ensures that any two terminals using different carriers have at least one SA transmission opportunity to transmit SA information in different time domain resources, so that both parties can receive the SA information of the other party.

Referring to FIG. 5, an embodiment of the present invention provides an apparatus 500 for determining a time-frequency resource, where the apparatus 500 includes: a receiving unit 501 and a processor 502;

The receiving unit 501 is configured to acquire time domain resource location information and frequency domain resource location information of the first time-frequency resource, where the first time-frequency resource is a time domain resource used for transmitting the service data in the first service data transmission opportunity. And a frequency domain resource; acquiring an index of a carrier where the frequency domain resource in the first time-frequency resource is located information;

The processing unit 502 is configured to determine, according to the time domain resource location information, the frequency domain resource location information, and the index information, the second time-frequency resource, where the second time-frequency resource is within another service data transmission opportunity The time domain resource and the frequency domain resource used for transmitting the service data.

The total number of service data transmission opportunities for transmitting service data and the total number of SA transmission opportunities for scheduling SA allocation information corresponding to the service data are both N, N being an integer greater than or equal to 1;

And, the time domain resource used for transmitting the SA information in the nth SA transmission opportunity is the same as the time domain resource used for transmitting the service data in the nth service data transmission opportunity, n=1, 2...N ;

Optionally, the receiving unit 501 is further configured to acquire a frequency domain resource used to send the SA information in the nth service data transmission opportunity;

The processing unit 502 is further configured to determine, in the nth service data transmission opportunity, a time domain resource used to send the service data, to determine a time domain used to send the SA information in the nth service data transmission opportunity. Resources.

Optionally, the receiving unit 501 is configured to acquire, at the nth SA transmission opportunity, from a start location or an end location of a frequency domain resource used to send the service data in the nth service data transmission opportunity. A frequency domain resource for transmitting the SA information.

A person skilled in the art may understand that all or part of the steps of implementing the above embodiments may be completed by hardware, or may be instructed by a program to execute related hardware, and the program may be stored in a computer readable storage medium. The storage medium mentioned may be a read only memory, a magnetic disk or an optical disk or the like.

The above are only the preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalents, improvements, etc., which are within the spirit and scope of the present invention, should be included in the protection of the present invention. Within the scope.

Claims (26)

A method for determining a time-frequency resource, the method comprising: And acquiring the resource information of the first time-frequency resource, where the first time-frequency resource is a time domain resource and a frequency domain resource used for sending the SA information in the first scheduled allocation SA transmission opportunity, where the resource information is the first The transmission resource index information of the time-frequency resource or the time domain resource location information and the frequency domain resource location information of the first time-frequency resource; Obtaining index information of a carrier where the frequency domain resource in the first time-frequency resource is located; Determining, according to the resource information and the index information of the carrier, a second time-frequency resource, where the second time-frequency resource is a time domain resource and a frequency domain resource used for sending the SA information in other SA transmission opportunities. The method of claim 1 wherein the method further comprises: Obtaining time domain resource location information and frequency domain resource location information of the third time-frequency resource, where the third time-frequency resource is a time domain resource used for transmitting the service data corresponding to the SA information in the first service data transmission opportunity And frequency domain resources; Determining, according to the index information of the carrier, the time domain resource location information of the third time-frequency resource, and the frequency domain resource location information, where the fourth time-frequency resource is in another service data transmission opportunity The time domain resource and the frequency domain resource used for transmitting the service data. The method of claim 1 wherein The total number of SA transmission opportunities for transmitting the SA information and the total number of service data transmission opportunities for transmitting the service data corresponding to the SA information are both N, N being an integer greater than or equal to 1; And, the time domain resource used for transmitting the SA information in the nth SA transmission opportunity is the same as the time domain resource used for transmitting the service data in the nth service data transmission opportunity, n=1, 2...N ; The method further includes: Obtaining a frequency domain resource for transmitting the service data in the nth service data transmission opportunity; The time domain resource for transmitting the SA information within the nth SA transmission opportunity is determined as the time domain resource for transmitting the service data within the nth service data transmission opportunity. The method of claim 3 wherein said obtaining the nth service data transmission The frequency domain resources used in the transmission to send the service data, including: Obtaining, from the start position or the end position of the frequency domain resource for transmitting the SA information in the nth SA transmission opportunity, obtaining a frequency domain resource for transmitting the service data in the nth service data transmission opportunity . The method according to claim 1, wherein the determining the second time-frequency resource according to the resource information and the index information of the carrier comprises: Determining, according to the resource information, a frequency domain resource included in the second time-frequency resource; And determining, according to the resource information and the index information of the carrier, a time domain resource included in the second time-frequency resource. The method according to claim 5, wherein the determining the time domain resource included in the second time-frequency resource according to the resource information and the index information of the carrier comprises: Determining, by using the following formula, the time domain resource b2 included in the second time-frequency resource;

In the above formula, n _PSCCH is the transmission resource index information,

For the preset resource pool or the number of frequency domain resources included in the resource pool configured by the base station, n _c is index information of the carrier, and L _PSCCH is the number of time domain resources included in the resource pool. The method according to claim 5, wherein the determining the time domain resource included in the second time-frequency resource according to the resource information and the index information of the carrier comprises: Determining, by using the following formula, a time domain resource j(n) included in the second time-frequency resource; j(n)=mod(j(1)+i(1)*(n-1)+M*(c-1),T)+T*(n-1) In the above formula, i(1) is the frequency domain resource location information, j(1) is the time domain resource location information, and M is a frequency domain included in a preset resource pool or a resource pool configured by a base station. The number of resources, T is the ratio of the number of time domain resources included in the resource pool configured in the preset resource pool or configured by the base station to N, and N is the total number of SA transmission opportunities included in one transmission period, where n is the first The number of times of any SA transmission opportunity other than the secondary SA transmission opportunity, n is 2, 3, ..., N, and c is the index information of the carrier. The method of claim 5 wherein said said resource information and said said The index information of the carrier is used to determine the time domain resource included in the second time-frequency resource, including: Determining, by using the following formula, a time domain resource j(n) included in the second time-frequency resource; j(n)=mod(j(1)+i(1)*(n-1+c-1)+M*(c-1),T)+T(n-1) In the above formula, i(1) is the frequency domain resource location information, j(1) is the time domain resource location information, and M is a frequency domain included in a preset resource pool or a resource pool configured by a base station. The number of resources, T is the ratio of the number of time domain resources included in the resource pool configured in the preset resource pool or configured by the base station to N, and N is the total number of SA transmission opportunities included in one transmission period, where n is the first The number of times of any SA transmission opportunity other than the secondary SA transmission opportunity, n is 2, 3, ..., N, and c is the index information of the carrier. The method according to claim 5, wherein the determining the time domain resource included in the second time-frequency resource according to the resource information and the index information of the carrier comprises: By determining the time domain resource j(n) included in the second time-frequency resource as described in the following formula; j(n)=mod(j(1)+i(1)*(n-1)+M*(c-1),T)+mod(T*(n-1),T*N) In the above formula, i(1) is the frequency domain resource location information, j(1) is the time domain resource location information, and M is a frequency domain included in a preset resource pool or a resource pool configured by a base station. The number of resources, T is the ratio of the number of time domain resources included in the resource pool configured in the preset resource pool or configured by the base station to N, and N is the total number of SA transmission opportunities included in one transmission period, where n is the first The number of times of any SA transmission opportunity other than the secondary SA transmission opportunity, n is 2, 3, ..., N*S, where S is the number of transmission periods in which the SA information is transmitted, and c is index information of the carrier. The method according to claim 5, wherein the determining the time domain resource included in the second time-frequency resource according to the resource information and the index information of the carrier comprises: Determining, by using the following formula, a time domain resource j(n) included in the second time-frequency resource; j(n)=mod(j(1)+i(1)*(n-1+c-1)+M*(c-1),T)+mod(T*(n-1),T* N) In the above formula, i(1) is the frequency domain resource location information, j(1) is the time domain resource location information, and M is a frequency domain included in a preset resource pool or a resource pool configured by a base station. The number of resources, T is the ratio of the number of time domain resources included in the resource pool configured in the preset resource pool or configured by the base station to N, and N is the total number of SA transmission opportunities included in one transmission period, where n is the first The number of times of any SA transmission opportunity other than the secondary SA transmission opportunity, n is 2, 3, ..., N*S, where S is the number of transmission periods in which the SA information is transmitted, and c is index information of the carrier. A method for determining a time-frequency resource, the method comprising: Obtaining time domain resource location information and frequency domain resource location information of the first time-frequency resource, where the first time-frequency resource is a time domain resource and a frequency domain resource used for transmitting the service data in the first service data transmission opportunity; Obtaining index information of a carrier where the frequency domain resource in the first time-frequency resource is located; Determining, according to the time domain resource location information, the frequency domain resource location information, and the index information, the second time-frequency resource, where the second time-frequency resource is used to send the service data in another service data transmission opportunity. Time domain resources and frequency domain resources. The method according to claim 11, wherein the total number of service data transmission opportunities for transmitting service data and the total number of SA transmission opportunities for scheduling the allocation of SA information corresponding to the service data are both N, N. An integer greater than or equal to 1; And, the time domain resource used for transmitting the SA information in the nth SA transmission opportunity is the same as the time domain resource used for transmitting the service data in the nth service data transmission opportunity, n=1, 2...N ; The method further includes: Obtaining a frequency domain resource for transmitting the SA information in the nth SA transmission opportunity; The time domain resource for transmitting the service data in the nth service data transmission opportunity is determined as the time domain resource for transmitting the SA information within the nth SA transmission opportunity. The method according to claim 12, wherein the acquiring the frequency domain resource for transmitting the SA information in the nth SA transmission opportunity comprises: Obtaining a frequency domain resource for transmitting the SA information in the nth SA transmission opportunity from a start location or an end location of the frequency domain resource used to send the service data in the nth service data transmission opportunity . An apparatus for determining a time-frequency resource, wherein the apparatus comprises: a receiving unit and a processing unit; The receiving unit is configured to acquire resource information of the first time-frequency resource, where the first time-frequency resource is a time domain resource and a frequency domain resource used for transmitting SA information in the first scheduled allocation SA transmission opportunity, The resource information is the transmission resource index information of the first time-frequency resource or is the first time-frequency resource. Time domain resource location information and frequency domain resource location information; acquiring index information of a carrier where the frequency domain resource in the first time-frequency resource is located; The processing unit is configured to determine, according to the resource information and the index information of the carrier, a second time-frequency resource, where the second time-frequency resource is a time domain used for sending the SA information in other SA transmission opportunities. Resources and frequency domain resources. The device of claim 14 wherein: The receiving unit is further configured to acquire time domain resource location information and frequency domain resource location information of the third time-frequency resource, where the third time-frequency resource is configured to send the SA information in the first service data transmission opportunity. Time domain resources and frequency domain resources used for business data; The processing unit is further configured to determine, according to the index information of the carrier, the time domain resource location information of the third time-frequency resource, and the frequency domain resource location information, the fourth time-frequency resource, where the fourth time-frequency resource Time domain resources and frequency domain resources used for transmitting the service data within other service data transmission opportunities. The apparatus according to claim 14, wherein the total number of SA transmission opportunities for transmitting the SA information and the total number of service data transmission opportunities for transmitting the service data corresponding to the SA information are both N, N An integer greater than or equal to 1; And, the time domain resource used for transmitting the SA information in the nth SA transmission opportunity is the same as the time domain resource used for transmitting the service data in the nth service data transmission opportunity, n=1, 2...N ; The receiving unit is further configured to acquire a frequency domain resource used to send the service data in the nth service data transmission opportunity; The processing unit is further configured to determine a time domain resource used for transmitting SA information in the nth SA transmission opportunity as a time domain resource used to send the service data in the nth service data transmission opportunity. The apparatus according to claim 16, wherein the receiving unit is configured to acquire, from a start position or an end position of a frequency domain resource for transmitting the SA information in an nth SA transmission opportunity. A frequency domain resource for transmitting the service data within the nth service data transmission opportunity. The device of claim 14 wherein: The processing unit is configured to determine, according to the resource information, a frequency domain resource that is included in the second time-frequency resource, and determine, according to the resource information and the index information of the carrier, the second time-frequency resource Time domain resources. The apparatus according to claim 18, wherein the processing unit is configured to determine a time domain resource b2 included in the second time-frequency resource by using a formula;

In the above formula, n _PSCCH is the transmission resource index information,

The number of frequency domain resource is a predetermined resource pool or resource pool configured by the base station includes, n _c is an index of the information carrier, L _PSCCH is the number of time domain resources included in the resource pool. The apparatus according to claim 18, wherein the processing unit is configured to determine a time domain resource j(n) included in the second time-frequency resource by using a formula; j(n)=mod(j(1)+i(1)*(n-1)+M*(c-1),T)+T*(n-1) In the above formula, i(1) is the frequency domain resource location information, j(1) is the time domain resource location information, and M is a frequency domain included in a preset resource pool or a resource pool configured by a base station. The number of resources, T is the ratio of the number of time domain resources included in the resource pool configured in the preset resource pool or configured by the base station to N, and N is the total number of SA transmission opportunities included in one transmission period, where n is the first The number of times of any SA transmission opportunity other than the secondary SA transmission opportunity, n is 2, 3, ..., N, and c is the index information of the carrier. The apparatus according to claim 18, wherein the processing unit is configured to determine a time domain resource j(n) included in the second time-frequency resource by using a formula; j(n)=mod(j(1)+i(1)*(n-1+c-1)+M*(c-1),T)+T(n-1) In the above formula, i(1) is the frequency domain resource location information, j(1) is the time domain resource location information, and M is a frequency domain included in a preset resource pool or a resource pool configured by a base station. The number of resources, T is the ratio of the number of time domain resources included in the resource pool configured in the preset resource pool or configured by the base station to N, and N is the total number of SA transmission opportunities included in one transmission period, where n is the first The number of times of any SA transmission opportunity other than the secondary SA transmission opportunity, n is 2, 3, ..., N, and c is the index information of the carrier. The apparatus according to claim 18, wherein the processing unit is configured to determine a time domain resource j(n) included in the second time-frequency resource by using a formula; j(n)=mod(j(1)+i(1)*(n-1)+M*(c-1),T)+mod(T*(n-1),T*N) In the above formula, i(1) is the frequency domain resource location information, j(1) is the time domain resource location information, and M is a frequency domain included in a preset resource pool or a resource pool configured by a base station. The number of resources, T is the ratio of the number of time domain resources included in the resource pool configured in the preset resource pool or configured by the base station to N, and N is the total number of SA transmission opportunities included in one transmission period, where n is the first The number of times of any SA transmission opportunity other than the secondary SA transmission opportunity, n is 2, 3, ..., N*S, where S is the number of transmission periods in which the SA information is transmitted, and c is index information of the carrier. The apparatus according to claim 18, wherein the processing unit is configured to determine a time domain resource j(n) included in the second time-frequency resource by using a formula; j(n)=mod(j(1)+i(1)*(n-1+c-1)+M*(c-1),T)+mod(T*(n-1),T* N) In the above formula, i(1) is the frequency domain resource location information, j(1) is the time domain resource location information, and M is a frequency domain included in a preset resource pool or a resource pool configured by a base station. The number of resources, T is the ratio of the number of time domain resources included in the resource pool configured in the preset resource pool or configured by the base station to N, and N is the total number of SA transmission opportunities included in one transmission period, where n is the first The number of times of any SA transmission opportunity other than the secondary SA transmission opportunity, n is 2, 3, ..., N*S, where S is the number of transmission periods in which the SA information is transmitted, and c is index information of the carrier. A device for determining time-frequency resources, characterized in that the device comprises: a receiving unit and a processing unit The receiving unit is configured to acquire time domain resource location information and frequency domain resource location information of the first time-frequency resource, where the first time-frequency resource is used in the first service data transmission opportunity to send the service data. a resource and a frequency domain resource; acquiring index information of a carrier where the frequency domain resource in the first time-frequency resource is located; The processing unit is configured to determine, according to the time domain resource location information, the frequency domain resource location information, and the index information, the second time-frequency resource, where the second time-frequency resource is sent in another service data transmission opportunity Time domain resources and frequency domain resources used by the service data. The apparatus according to claim 24, wherein the total number of service data transmission opportunities for transmitting service data and the total number of SA transmission opportunities for scheduling the allocation of SA information corresponding to the service data are both N, N An integer greater than or equal to 1; And, the time domain resource used for transmitting the SA information in the nth SA transmission opportunity is the same as the time domain resource used for transmitting the service data in the nth service data transmission opportunity, n=1, 2...N ; The receiving unit is further configured to acquire a frequency domain resource used to send the SA information in the nth service data transmission opportunity; The processing unit is further configured to determine a time domain resource used for transmitting service data in the nth service data transmission opportunity as a time domain resource used to send the SA information in the nth SA transmission opportunity. The apparatus according to claim 25, wherein said receiving unit is configured to start from a start position or an end position of a frequency domain resource for transmitting said service data within an nth service data transmission opportunity, Obtaining a frequency domain resource for transmitting the SA information in the nth SA transmission opportunity.

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