WO2017028154A1 - Resource allocation indication method and device, access point, and user equipment - Google Patents

Abstract

Provided are a resource allocation indication method and device, an access point, and a user equipment, which relate to the technical field of wireless communications. The method comprises: an AP allocates a parallel link sub-channel used for D2D transmission to a user equipment requesting D2D transmission, wherein the parallel link sub-channel occupies all or some of the bandwidth of a channel occupied by a BSS established by the AP; the AP generates resource allocation indication information, wherein the resource allocation indication information is used for indicating a time-frequency resource occupied by the parallel link sub-channel; and the AP provides resource allocation indication information to the user equipment, wherein the user equipment is used for performing D2D transmission on the parallel link sub-channel according to the resource allocation indication information. The present invention solves the problem that a resource usage method for D2D transmission in an existing WLAN system is too unitary and lacks flexibility, and improves the flexibility of resource allocation and scheduling, thus achieving rational scheduling and use of bandwidth resources.

Description

Resource allocation indication method, device, access point and user equipment Technical field

The present invention relates to the field of wireless communication technologies, and in particular, to a resource allocation indication method, apparatus, and access point for a wireless local area network (English: Wireless Local Area Network; WLAN) system (English: Access Point; abbreviation: AP ) and user equipment.

Background technique

With the rapid development of wireless communication technology, WLAN has been widely used in homes, offices, public places and other areas. In a WLAN system, stations (English: satation; abbreviation: STA) communicate with each other through an AP. That is, the transmitting station sends data to the AP, and the AP forwards the data to the receiving site.

In order to improve the efficiency of data transmission between sites, the relevant standards organization introduces Device to Device (D2D) technology into the WLAN system. In the WLAN system, a direct link establishment (Tunneled Direct Link Setup; TDLS) is proposed, and a TDLS chain is established between two sites in the same basic service set (English: Basic Service Set; BSS for short). After the road, the data transmission between the two sites can be performed in the form of D2D without forwarding through the AP.

In an existing WLAN system, an AP establishes a BSS on an unlicensed frequency band, and a pair of stations transmitted by the D2D perform D2D transmission by competing for the entire channel occupied by the BSS, and the resource usage mode for the D2D transmission is too single. Lack of flexibility.

Summary of the invention

In order to solve the problem that the resource usage of the D2D transmission in the existing WLAN system is too single and lacks flexibility, the embodiment of the present invention provides a resource allocation indication method, apparatus, AP, and user equipment for use in a WLAN system. The technical solution is as follows:

In a first aspect, a method for resource allocation indication in a WLAN system is provided, the method comprising:

The AP allocates a parallel link subchannel for D2D transmission to the user equipment requesting D2D transmission, The parallel link subchannel occupies all or part of a bandwidth of a channel occupied by a BSS established by the AP;

The AP generates resource allocation indication information, where the resource allocation indication information is used to indicate time-frequency resources occupied by the parallel link subchannel;

The AP provides the resource allocation indication information to the user equipment.

In a first possible implementation manner of the first aspect, the bandwidth of the parallel link subchannel is an integer multiple of 20 MHz.

With reference to the first aspect, or the first possible implementation manner of the first aspect, in the second possible implementation manner of the first aspect, the resource allocation indication information includes: a first field and n second fields;

The first field is used to indicate the total number n of subchannels obtained by the AP dividing the channel occupied by the BSS;

The i-th second field is used to indicate the type of the i-th sub-channel; one type corresponds to a set of channel parameters, and each set of channel parameters includes: the number of resource units RU included in the sub-channel, the bandwidth size, and the use;

Where 1 ≤ i ≤ n, and i and n are integers.

In conjunction with the second possible implementation of the first aspect, in a third possible implementation of the first aspect, the channel parameter includes:

Contains multiple RUs, 20MHz bandwidth and is used for regular transmission; or,

Contains a single RU, 20MHz bandwidth and is used for regular transmission; or,

Includes a single RU, 20MHz bandwidth and is used for D2D transmission; or,

Contains a single RU, 40MHz bandwidth and is used for regular transmission; or,

Includes a single RU, 40MHz bandwidth and is used for D2D transmission; or,

Contains a single RU, 80MHz bandwidth and is used for regular transmission; or,

Includes a single RU, 80MHz bandwidth and is used for D2D transmission; or,

Includes a single RU, 160MHz bandwidth and is used for D2D transmission.

With reference to the first aspect, or the first possible implementation manner of the first aspect, in the fourth possible implementation manner of the first aspect, the resource allocation indication information includes: a first field, n third fields, and n fourth fields;

The first field is used to indicate the total number n of subchannels obtained by the AP dividing the channel occupied by the BSS;

The i th third field is used to indicate the bandwidth size of the i th subchannel;

The i-th fourth field is used to indicate the use of the i-th sub-channel;

Where 1 ≤ i ≤ n, and i and n are integers.

With reference to the fourth possible implementation of the first aspect, in a fifth possible implementation manner of the first aspect, the bandwidth is any one of a 20 MHz bandwidth, a 40 MHz bandwidth, an 80 MHz bandwidth, and a 160 MHz bandwidth. The use is for D2D transmission or for regular transmission.

With reference to the second possible implementation manner of the first aspect, or the fourth possible implementation manner of the first aspect, in the sixth possible implementation manner of the first aspect, the resource allocation indication information further includes: Descriptive information corresponding to a subchannel, and the signaling length of the description information corresponding to each subchannel is a preset value;

The description information corresponding to the ith subchannel includes the identifier information and the transmission parameter corresponding to the ith subchannel, and the identifier information corresponding to the ith subchannel is used to indicate the user equipment to which the ith subchannel is allocated. .

In a second aspect, a method for resource allocation indication in a WLAN system is provided, the method comprising:

The user equipment acquires resource allocation indication information sent by the AP.

Determining, by the user equipment, time-frequency resources occupied by the parallel link subchannel for D2D transmission allocated by the AP for the user equipment, according to the resource allocation indication information, where the parallel link subchannel occupation Describe all or part of the bandwidth of the channel occupied by the BSS established by the AP;

The user equipment performs D2D transmission on the parallel link subchannel.

In a first possible implementation manner of the second aspect, the bandwidth of the parallel link subchannel is an integer multiple of 20 MHz.

With reference to the second aspect, or the first possible implementation manner of the second aspect, in the second possible implementation manner of the second aspect, the resource allocation indication information includes: a first field and n second fields;

The first field is used to indicate the total number n of subchannels obtained by the AP to divide the channel occupied by the BSS; the second i field is used to indicate the type of the i th subchannel; one type corresponds to one Group channel parameters, each group of channel parameters includes: the number of resource units RU included in the subchannel, the bandwidth size, and the use; wherein, 1≤i≤n, i and n are integers;

Determining, by the user equipment, that the AP is the user equipment according to the resource allocation indication information The allocated time-frequency resources occupied by the parallel link subchannels for D2D transmission, including:

Determining, by the user equipment, the total number n of the subchannels according to the first field;

The user equipment reads the n second fields according to the total number n of the subchannels;

The user equipment determines, according to the n second fields, the number of RUs and the size of the bandwidth included in the parallel link subchannel.

With reference to the second aspect, or the first possible implementation manner of the second aspect, in the third possible implementation manner of the second aspect, the resource allocation indication information includes: a first field, n third fields, and n fourth fields;

The first field is used to indicate the total number n of subchannels obtained by the AP to divide the channel occupied by the BSS; the i th third field is used to indicate the bandwidth of the i th subchannel; the i th fourth a field is used to indicate the use of the i-th subchannel; wherein, 1≤i≤n, i and n are integers;

Determining, by the user equipment, the time-frequency resource occupied by the parallel link subchannel for D2D transmission allocated by the AP for the user equipment, according to the resource allocation indication information, including:

Determining, by the user equipment, the total number n of the subchannels according to the first field;

The user equipment reads the n third fields and the n fourth fields according to the total number n of the subchannels;

And determining, by the user equipment, a bandwidth size of the parallel link subchannel according to the n third fields and the n fourth fields.

With reference to the second possible implementation manner of the second aspect, or the third possible implementation manner of the second aspect, in the fourth possible implementation manner of the second aspect, the resource allocation indication information further includes: Descriptive information corresponding to a subchannel, and the signaling length of the description information corresponding to each subchannel is a preset value; the description information corresponding to the i th subchannel includes identifier information and transmission corresponding to the i th subchannel parameter;

The user equipment performs D2D transmission on the parallel link subchannel, including:

The user equipment calculates a location of the description information corresponding to the parallel link subchannel;

Reading, by the user equipment, description information corresponding to the parallel link subchannel according to a location of the description information corresponding to the parallel link subchannel;

The user equipment detects, according to the identifier information in the description information corresponding to the parallel link subchannel, whether the parallel link subchannel is allocated by the AP as the user equipment;

If the parallel link subchannel is allocated for the user equipment, the user equipment performs D2D transmission on the parallel link subchannel according to a transmission parameter corresponding to the parallel link subchannel.

In a third aspect, a resource allocation indication apparatus for use in a WLAN system is provided, the apparatus comprising:

An allocation module, configured to allocate, for a user equipment that requests D2D transmission, a parallel link subchannel for D2D transmission, where the parallel link subchannel occupies all or part of a bandwidth of a channel occupied by an AP established by the AP;

a generating module, configured to generate resource allocation indication information, where the resource allocation indication information is used to indicate a time-frequency resource occupied by the parallel link subchannel;

And providing a module, configured to provide the resource allocation indication information to the user equipment.

In a first possible implementation manner of the third aspect, the bandwidth of the parallel link subchannel is an integer multiple of 20 MHz.

With reference to the third aspect, or the first possible implementation manner of the third aspect, in the second possible implementation manner of the third aspect, the resource allocation indication information includes: a first field and n second fields;

The first field is used to indicate the total number n of subchannels obtained by the AP dividing the channel occupied by the BSS;

The i-th second field is used to indicate the type of the i-th sub-channel; one type corresponds to a set of channel parameters, and each set of channel parameters includes: the number of resource units RU included in the sub-channel, the bandwidth size, and the use;

Where 1 ≤ i ≤ n, and i and n are integers.

With reference to the second possible implementation manner of the third aspect, in a third possible implementation manner of the third aspect, the channel parameter includes:

Contains multiple RUs, 20MHz bandwidth and is used for regular transmission; or,

Contains a single RU, 20MHz bandwidth and is used for regular transmission; or,

Includes a single RU, 20MHz bandwidth and is used for D2D transmission; or,

Contains a single RU, 40MHz bandwidth and is used for regular transmission; or,

Includes a single RU, 40MHz bandwidth and is used for D2D transmission; or,

Contains a single RU, 80MHz bandwidth and is used for regular transmission; or,

Includes a single RU, 80MHz bandwidth and is used for D2D transmission; or,

Includes a single RU, 160MHz bandwidth and is used for D2D transmission.

In combination with the third aspect or the first possible implementation of the third aspect, the fourth aspect in the third aspect In a possible implementation manner, the resource allocation indication information includes: a first field, n third fields, and n fourth fields;

The first field is used to indicate the total number n of subchannels obtained by the AP dividing the channel occupied by the BSS;

The i th third field is used to indicate the bandwidth size of the i th subchannel;

The i-th fourth field is used to indicate the use of the i-th sub-channel;

Where 1 ≤ i ≤ n, and i and n are integers.

With reference to the fourth possible implementation manner of the third aspect, in a fifth possible implementation manner of the third aspect, the bandwidth is any one of a 20 MHz bandwidth, a 40 MHz bandwidth, an 80 MHz bandwidth, and a 160 MHz bandwidth. The use is for D2D transmission or for regular transmission.

With reference to the second possible implementation manner of the third aspect, or the fourth possible implementation manner of the third aspect, in the sixth possible implementation manner of the third aspect, the resource allocation indication information further includes: Descriptive information corresponding to a subchannel, and the signaling length of the description information corresponding to each subchannel is a preset value;

The description information corresponding to the ith subchannel includes the identifier information and the transmission parameter corresponding to the ith subchannel, and the identifier information corresponding to the ith subchannel is used to indicate the user equipment to which the ith subchannel is allocated. .

A fourth aspect provides a resource allocation indication apparatus for use in a WLAN system, the apparatus comprising:

An obtaining module, configured to acquire resource allocation indication information sent by the AP;

a determining module, configured to determine, according to the resource allocation indication information, a time-frequency resource occupied by the AP for the parallel link subchannel allocated by the user equipment for D2D transmission; wherein the parallel link subchannel occupies the All or part of the bandwidth of the channel occupied by the BSS established by the AP;

And a transmission module, configured to perform D2D transmission on the parallel link subchannel.

In a first possible implementation manner of the fourth aspect, the bandwidth of the parallel link subchannel is an integer multiple of 20 MHz.

With reference to the fourth aspect, or the first possible implementation manner of the fourth aspect, in the second possible implementation manner of the fourth aspect, the resource allocation indication information includes: a first field and n second fields;

The first field is used to indicate that the AP divides the channel occupied by the BSS into a sub-letter. The total number of tracks n; the ith second field is used to indicate the type of the i-th subchannel; one type corresponds to a set of channel parameters, and each set of channel parameters includes: the number of resource units RU included in the subchannel, and the bandwidth size And use; wherein, 1 ≤ i ≤ n, i and n are integers;

The determining module includes: a first determining unit, a first reading unit, and a second determining unit;

The first determining unit is configured to determine a total number n of the subchannels according to the first field;

The first reading unit is configured to read the n second fields according to the total number n of the subchannels;

The second determining unit is configured to determine, according to the n second fields, the number of RUs and the size of the bandwidth included in the parallel link subchannel.

With reference to the fourth aspect, or the first possible implementation manner of the fourth aspect, in a third possible implementation manner of the fourth aspect, the resource allocation indication information includes: a first field, n third fields, and n fourth fields;

The first field is used to indicate the total number n of subchannels obtained by the AP to divide the channel occupied by the BSS; the i th third field is used to indicate the bandwidth of the i th subchannel; the i th fourth a field is used to indicate the use of the i-th subchannel; wherein, 1≤i≤n, i and n are integers;

The determining module includes: a first determining unit, a second reading unit, and a third determining unit;

The first determining unit is configured to determine a total number n of the subchannels according to the first field;

The second reading unit is configured to read the n third fields and the n fourth fields according to the total number n of the subchannels;

The third determining unit is configured to determine, according to the n third fields and the n fourth fields, a bandwidth size of the parallel link subchannel.

With reference to the second possible implementation manner of the fourth aspect, or the third possible implementation manner of the fourth aspect, in the fourth possible implementation manner of the fourth aspect, the resource allocation indication information further includes: Descriptive information corresponding to a subchannel, and the signaling length of the description information corresponding to each subchannel is a preset value; the description information corresponding to the i th subchannel includes identifier information and transmission corresponding to the i th subchannel parameter;

The transmission module includes: a calculation unit, an information reading unit, a detection unit, and a transmission unit;

The calculating unit is configured to calculate a location of the description information corresponding to the parallel link subchannel;

The information reading unit is configured to read, according to a location of the description information corresponding to the parallel link subchannel, description information corresponding to the parallel link subchannel;

The detecting unit is configured to detect, according to the identifier information in the description information corresponding to the parallel link subchannel, whether the parallel link subchannel is allocated by the AP to the user equipment;

The transmitting unit is configured to perform D2D transmission on the parallel link subchannel according to a transmission parameter corresponding to the parallel link subchannel when the parallel link subchannel is allocated for the user equipment. .

In a fifth aspect, a user equipment is provided, the user equipment comprising the resource allocation indication apparatus in the WLAN system provided by any one of the possible aspects of the fourth aspect or the fourth aspect.

In a sixth aspect, an AP is provided, the AP comprising: a processor, a memory, and a transceiver, the memory for storing one or more instructions, the instructions being configured to be executed by the processor;

The processor is configured to allocate, for a user equipment that requests D2D transmission, a parallel link subchannel for D2D transmission, where the parallel link subchannel occupies all or part of a bandwidth of a channel occupied by a BSS established by the AP;

The processor is further configured to generate resource allocation indication information, where the resource allocation indication information is used to indicate a time-frequency resource occupied by the parallel link subchannel;

The processor is further configured to control the transceiver to provide the resource allocation indication information to the user equipment.

In a first possible implementation manner of the sixth aspect, the bandwidth of the parallel link subchannel is an integer multiple of 20 MHz.

With reference to the sixth aspect, or the first possible implementation manner of the sixth aspect, in the second possible implementation manner of the sixth aspect, the resource allocation indication information includes: a first field and n second fields;

The first field is used to indicate the total number n of subchannels obtained by the AP dividing the channel occupied by the BSS;

The i-th second field is used to indicate the type of the i-th sub-channel; one type corresponds to a set of channel parameters, and each set of channel parameters includes: the number of resource units RU included in the sub-channel, the bandwidth size, and the use;

Where 1 ≤ i ≤ n, and i and n are integers.

With reference to the second possible implementation manner of the sixth aspect, in a third possible implementation manner of the sixth aspect, the channel parameter includes:

Contains multiple RUs, 20MHz bandwidth and is used for regular transmission; or,

Contains a single RU, 20MHz bandwidth and is used for regular transmission; or,

Includes a single RU, 20MHz bandwidth and is used for D2D transmission; or,

Contains a single RU, 40MHz bandwidth and is used for regular transmission; or,

Includes a single RU, 40MHz bandwidth and is used for D2D transmission; or,

Contains a single RU, 80MHz bandwidth and is used for regular transmission; or,

Includes a single RU, 80MHz bandwidth and is used for D2D transmission; or,

Includes a single RU, 160MHz bandwidth and is used for D2D transmission.

With reference to the sixth aspect, or the first possible implementation manner of the sixth aspect, in the fourth possible implementation manner of the sixth aspect, the resource allocation indication information includes: a first field, n third fields, and n fourth fields;

The first field is used to indicate the total number n of subchannels obtained by the AP dividing the channel occupied by the BSS;

The i th third field is used to indicate the bandwidth size of the i th subchannel;

The i-th fourth field is used to indicate the use of the i-th sub-channel;

Where 1 ≤ i ≤ n, and i and n are integers.

With reference to the fourth possible implementation manner of the sixth aspect, in a fifth possible implementation manner of the sixth aspect, the bandwidth is any one of a 20 MHz bandwidth, a 40 MHz bandwidth, an 80 MHz bandwidth, and a 160 MHz bandwidth. The use is for D2D transmission or for regular transmission.

With reference to the second possible implementation manner of the sixth aspect, or the fourth possible implementation manner of the sixth aspect, in the sixth possible implementation manner of the sixth aspect, the resource allocation indication information further includes: Descriptive information corresponding to a subchannel, and the signaling length of the description information corresponding to each subchannel is a preset value;

The description information corresponding to the ith subchannel includes the identifier information and the transmission parameter corresponding to the ith subchannel, and the identifier information corresponding to the ith subchannel is used to indicate the user equipment to which the ith subchannel is allocated. .

In a seventh aspect, a user equipment is provided, the user equipment comprising: a processor, a memory, and a transceiver, the memory for storing one or more instructions, the instructions being configured to be executed by the processor ;

The processor is configured to control, by the transceiver, the resource allocation indication information sent by the AP;

The processor is further configured to determine, according to the resource allocation indication information, a time-frequency resource occupied by the parallel link subchannel allocated by the AP for the D2D transmission allocated by the AP, where the parallel link The subchannel occupies all or part of the bandwidth of the channel occupied by the BSS established by the AP;

The processor is further configured to control the transceiver to perform D2D transmission on the parallel link subchannel.

In a first possible implementation manner of the seventh aspect, the bandwidth of the parallel link subchannel is an integer multiple of 20 MHz.

With reference to the seventh aspect, or the first possible implementation manner of the seventh aspect, in the second possible implementation manner of the seventh aspect, the resource allocation indication information includes: a first field and n second fields;

The first field is used to indicate the total number n of subchannels obtained by the AP to divide the channel occupied by the BSS; the second i field is used to indicate the type of the i th subchannel; one type corresponds to one Group channel parameters, each group of channel parameters includes: the number of resource units RU included in the subchannel, the bandwidth size, and the use; wherein, 1≤i≤n, i and n are integers;

The processor is specifically configured to:

Determining a total number n of the subchannels according to the first field;

Reading the n second fields according to the total number n of the subchannels;

And determining, according to the n second fields, the number of RUs and the size of the bandwidth included in the parallel link subchannel.

With reference to the seventh aspect, or the first possible implementation manner of the seventh aspect, in the third possible implementation manner of the seventh aspect, the resource allocation indication information includes: a first field, n third fields, and n fourth fields;

The first field is used to indicate the total number n of subchannels obtained by the AP to divide the channel occupied by the BSS; the i th third field is used to indicate the bandwidth of the i th subchannel; the i th fourth a field is used to indicate the use of the i-th subchannel; wherein, 1≤i≤n, i and n are integers;

The processor is specifically configured to:

Determining a total number n of the subchannels according to the first field;

Reading the n third fields and the n fourth fields according to the total number n of the subchannels;

Determining a bandwidth size of the parallel link subchannel according to the n third fields and the n fourth fields.

Combining the second possible implementation of the seventh aspect or the third possible implementation of the seventh aspect In a fourth possible implementation manner of the seventh aspect, the resource allocation indication information further includes: description information corresponding to each subchannel, and signaling lengths of description information corresponding to each subchannel are The description information corresponding to the ith subchannel includes the identification information and the transmission parameter corresponding to the ith subchannel;

The user equipment is specifically configured to:

Calculating a location of the description information corresponding to the parallel link subchannel;

Reading the description information corresponding to the parallel link subchannel according to the location of the description information corresponding to the parallel link subchannel;

Determining, according to the identifier information in the description information corresponding to the parallel link subchannel, whether the parallel link subchannel is allocated by the AP to the user equipment;

When the parallel link subchannel is allocated for the user equipment, the transceiver is controlled to perform D2D transmission on the parallel link subchannel according to a transmission parameter corresponding to the parallel link subchannel.

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

Assigning, by the AP, a parallel link subchannel for D2D transmission to the user equipment requesting D2D transmission, the parallel link subchannel occupies all or part of the bandwidth of the channel occupied by the BSS established by the AP; and solves the existing WLAN system The resource usage method for D2D transmission is too single and lacks flexibility; the flexibility of resource allocation and scheduling is improved, and the reasonable scheduling and utilization of bandwidth resources is realized.

In addition, by setting the bandwidth of the parallel link subchannel for the D2D transmission to be an integer multiple of 20 MHz, the technical solution provided by the embodiment of the present invention can be better applied to the existing wireless standard.

In addition, two simple and efficient signaling design schemes are provided, which minimizes the signaling overhead required for resource allocation indication information and improves signaling indication efficiency.

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 an implementation environment according to an embodiment of the present invention;

2 is a flowchart of a resource allocation indication method according to an embodiment of the present invention;

3 is a flowchart of a resource allocation indication method according to another embodiment of the present invention;

4A is a flowchart of a resource allocation indication method according to another embodiment of the present invention;

4B is a schematic diagram of a transmission involved in the embodiment shown in FIG. 4A;

4C is a schematic diagram of a subchannel allocation indication corresponding to FIG. 4B;

4D is a signaling structure diagram related to the embodiment shown in FIG. 4A;

FIG. 5A is a flowchart of a resource allocation indication method according to another embodiment of the present invention; FIG.

FIG. 5B is a schematic diagram of a transmission involved in the embodiment shown in FIG. 5A; FIG.

5C is a schematic diagram of a subchannel allocation indication corresponding to FIG. 5B;

FIG. 6 is a block diagram of a resource allocation indication apparatus according to an embodiment of the present invention; FIG.

FIG. 7A is a block diagram of a resource allocation indication apparatus according to another embodiment of the present invention; FIG.

7B and 7C are block diagrams of the determination module involved in the embodiment shown in FIG. 7A;

7D is a block diagram of a transmission module according to the embodiment shown in FIG. 7A;

FIG. 8 is a block diagram of a resource allocation indication system according to an embodiment of the present invention; FIG.

FIG. 9 is a structural block diagram of an AP according to an embodiment of the present invention;

FIG. 10 is a structural block diagram of a user equipment 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.

Please refer to FIG. 1 , which is a schematic diagram of an implementation environment involved in an embodiment of the present invention. The implementation environment includes: an AP 120 and a plurality of user equipments 140 . The AP 120 forms a WLAN system with a plurality of user devices 140.

The AP 120 is used to provide wireless access. For example, the AP 120 may be a wireless router, a home gateway, or a wireless network interface controller (English: Wireless Network Interface Controller; WNIC for short).

User device 140 can be a cell phone, a tablet, a multimedia player, an e-book reader, a portable computer, a smart home device, and the like.

In the embodiment of the present invention, the transmission between the user equipment 140 and the AP 120 is defined as a regular transmission, and the point-to-point transmission between the user equipment 140 and the user equipment 140 is defined as a D2D transmission. Further In the embodiment of the present invention, a channel for normal transmission between the user equipment 140 and the AP 120 is defined as a regular link (English: Normal Link; NL) subchannel, and the user equipment 140 and the user equipment 140 are used. The channel used for D2D transmission is defined as a parallel link (English: Equal Link; EL) subchannel.

Please refer to FIG. 2, which is a flowchart of a resource allocation indication method provided by an embodiment of the present invention. The resource allocation indication method is applicable to an AP in a WLAN system. The resource allocation indication method may include the following steps:

Step 202: The AP allocates a parallel link subchannel for D2D transmission to the user equipment requesting the D2D transmission, and the parallel link subchannel occupies all or part of the bandwidth of the channel occupied by the BSS established by the AP.

Step 204: The AP generates resource allocation indication information, where the resource allocation indication information is used to indicate time-frequency resources occupied by the parallel link subchannel.

Step 206: The AP provides resource allocation indication information to the user equipment, where the user equipment is configured to perform D2D transmission on the parallel link subchannel according to the resource allocation indication information.

In summary, the resource allocation indication method provided in this embodiment allocates, by the AP, a parallel link subchannel for D2D transmission for the user equipment that requests D2D transmission, and the parallel link subchannel occupies the BSS occupied by the AP. All or part of the bandwidth of the channel; solves the problem that the resource usage of the D2D transmission in the existing WLAN system is too single and lacks flexibility; the flexibility of resource allocation and scheduling is improved, and the reasonable scheduling of bandwidth resources is realized. use.

Please refer to FIG. 3, which is a flowchart of a resource allocation indication method according to another embodiment of the present invention. The resource allocation indication method is applicable to user equipment in a WLAN system. The resource allocation indication method may include the following steps:

Step 302: The user equipment acquires resource allocation indication information sent by the AP.

Step 304: The user equipment determines, according to the resource allocation indication information, a time-frequency resource occupied by the AP for the parallel link subchannel allocated for the D2D transmission, where the parallel link subchannel occupies the BSS established by the AP. All or part of the bandwidth of the channel.

Step 306, the user equipment performs D2D transmission on the parallel link subchannel.

In summary, the resource allocation indication method provided by this embodiment allocates, by the AP, a parallel link subchannel for D2D transmission for the user equipment that requests D2D transmission, and the parallel link subchannel occupies the The bandwidth of all or part of the channel occupied by the BSS established by the AP solves the problem that the resource usage of the D2D transmission in the existing WLAN system is too single and lacks flexibility; the flexibility of resource allocation and scheduling is improved, and the implementation is realized. Reasonable scheduling and utilization of bandwidth resources.

The technical solution provided by the embodiment of the present invention can be applied to a WLAN system of the Institute of Electrical and Electronics Engineers (IEEE) 802.11 series standard, including but not limited to 802.11a, 802.11b, and 802.11g. In the Wi-Fi system represented by the 802.11n or 802.11ac standard, it can also be applied to next-generation Wi-Fi systems or used in next-generation WLAN systems.

In the following, the technical solution provided by the present invention will be described and illustrated by way of several specific embodiments in the Wi-Fi system applied to the IEEE802.11ac standard. According to the IEEE802.11ac standard, the operating frequency band is the 5 GHz band, and the WLAN channel bandwidth may be any one of 20 MHz, 40 MHz, 80 MHz, and 160 MHz.

Please refer to FIG. 4A, which is a flowchart of a resource allocation indication method according to another embodiment of the present invention. The resource allocation indication method can be applied to the implementation environment shown in FIG. 1. The resource allocation indication method may include the following steps:

Step 401: The AP allocates a parallel link subchannel for D2D transmission for the user equipment that requests the D2D transmission, and the parallel link subchannel occupies all or part of the bandwidth of the channel occupied by the BSS established by the AP.

When the user equipment requests the AP to acquire the time-frequency resources required for the D2D transmission, the user equipment can report the resource occupation requirement to the AP. For example, the user equipment can report the amount of data transmitted by the D2D to the AP. The AP allocates time-frequency resources required for D2D transmission to the user equipment according to the resource occupation requirements of the user equipment.

In this embodiment, the parallel link subchannel allocated by the AP for the user equipment for D2D transmission occupies all or part of the bandwidth of the channel occupied by the BSS established by the AP. For example, the bandwidth of the channel occupied by the BSS established by the AP is 80 MHz. When the resource consumption requirement of the user equipment is small, the bandwidth of the parallel link subchannel allocated by the AP for the user equipment may be 20 MHz; when the resources of the user equipment When the occupancy requirement is large, the bandwidth of the parallel link subchannel allocated by the AP to the user equipment may be 40 MHz or more. Compared with the prior art, the resource allocation manner provided by this embodiment is more flexible, and the reasonable scheduling and utilization of bandwidth resources is realized.

Considering that the existing user equipment with Wi-Fi access function cannot filter the channel less than 20MHz, the automatic gain control of the channel cannot be performed (English: Automatic Gain Control; Abbreviation: AGC), so the bandwidth of the parallel link subchannel is an integer multiple of 20 MHz in order to better adapt to the existing Wi-Fi system.

In addition, a pair of user equipments requesting D2D transmission may be located in the same BSS, or may be located in different BSSs. When a pair of user equipments requesting D2D transmission are located in the same BSS, the APs in the BSS allocate parallel link subchannels for D2D transmission from the entire channel occupied by the BSSs it establishes. When a pair of user equipments requesting D2D transmission are located in different BSSs, one of the user equipments requests an AP in the BSS in which it is located to acquire time-frequency resources required for D2D transmission, and the AP occupies the entire BSS from its established BSS. Parallel link subchannels for D2D transmission are allocated in the channel.

Step 402: The AP generates resource allocation indication information, where the resource allocation indication information is used to indicate time-frequency resources occupied by the parallel link subchannel.

In this embodiment, the resource allocation indication information includes: a first field and n second fields.

The first field is used to indicate the total number n of subchannels obtained by the AP dividing the channel occupied by the BSS it establishes. The ith second field is used to indicate the type of the i-th subchannel. One type corresponds to a set of channel parameters. Each group of channel parameters includes: the number of resource units (English: Resource Unit; short: RU) included in the subchannel, bandwidth size, and usage. Where 1 ≤ i ≤ n, and i and n are integers.

In the existing Wi-Fi system, since the maximum bandwidth of the channel occupied by the BSS is 160 MHz, it can be divided into up to 8 subchannels with a bandwidth of 20 MHz, so the signaling length of the first field is 3 bits (bits). In a possible implementation manner, the correspondence between the first field and the total number n of subchannels indicated by it may be as shown in Table-1 below:

First field Total number of subchannels n 000 1 001 2 010 3 011 4 100 5 101 6 110 7 111 8

Table 1

In addition, in this embodiment, eight different types of subchannels are defined, so the signaling length of the second field is also 3 bits. The channel parameters corresponding to the eight different types of subchannels are:

(1) Contains multiple RUs, 20MHz bandwidth and is used for regular transmission;

(2) Contains a single RU, 20MHz bandwidth and is used for regular transmission;

(3) Contains a single RU, 20MHz bandwidth and is used for D2D transmission;

(4) Contains a single RU, 40MHz bandwidth and is used for regular transmission;

(5) Contains a single RU, 40MHz bandwidth and is used for D2D transmission;

(6) Contains a single RU, 80MHz bandwidth and is used for regular transmission;

(7) Contains a single RU, 80MHz bandwidth and is used for D2D transmission;

(8) Contains a single RU, 160 MHz bandwidth and is used for D2D transmission.

In a possible implementation manner, the correspondence between the second field and the type of the subchannel indicated by it may be as follows in Table-2:

Second field Subchannel type 000 20MHz regular link subchannel containing multiple RUs 001 20MHz regular link subchannel containing a single RU 010 20MHz parallel link subchannel containing a single RU 011 40MHz regular link subchannel containing a single RU 100 40MHz parallel link subchannel containing a single RU 101 80MHz regular link subchannel containing a single RU 110 80MHz parallel link subchannel containing a single RU 111 160MHz parallel link subchannel containing a single RU

Table 2

The AP generates resource allocation indication information according to the actual channel allocation status. The resource allocation indication information includes a first field and n second fields arranged in order. The first field is located before the n second fields, and the signaling lengths of the first field and the second field are both 3 bits.

Referring to FIG. 4B, a transmission diagram related to the embodiment is shown. Assuming that the bandwidth occupied by the BSS established by the AP is 80 MHz, the AP divides the channel into three subchannels, which are: a 20 MHz conventional link subchannel 41 containing multiple RUs, and a 20 MHz conventional sequence including a single RU. Link subchannel 42 and a 40 MHz parallel link subchannel 43 containing a single RU. Then, as shown in FIG. 4C, the first field is “010”, which is used to indicate that the total number of subchannels is 3. The first field is followed by three second fields, which are respectively "000", "001", and "100", and are used to indicate the types of the above three subchannels.

Optionally, the resource allocation indication information further includes: description information corresponding to each subchannel. Its The description information corresponding to the i-th subchannel includes the identifier information and the transmission parameter corresponding to the i-th subchannel. The identification information corresponding to the i-th subchannel is used to indicate the user equipment to which the i th subchannel is allocated. The transmission parameters include but are not limited to one or more of the following parameters: Modulation and Coding Scheme (MCS), transmission duration, number of space-time streams transmitted, and low-density parity check (English: Low Density Parity Check Code; LDPC for short), whether to use Space Time Block Coding (English: Space Time Block Coding; STBC for short), whether to use beamforming, whether to use aggregated frames, and the cyclic prefix used for transmission ( English: Cycle Prefix; referred to as: CP) Length, transmission power, transmission confirmation character (English: Acknowledgement; abbreviation: ACK) reply scheme, Clear Channel Assessment (CCA) threshold for transmission.

In a possible implementation manner, the resource allocation indication information may be configured in a preamble (English: preamble) HE-SIG-B (English: High Efficiency WLAN-signaling-B; Chinese: high efficiency wireless local area network B signaling domain ) in the field. In another possible implementation manner, the resource allocation indication information may also be configured in a medium access control (English: medium) control (English: payload).

Referring to FIG. 4D, a signaling structure diagram related to the embodiment is shown. For example, the resource allocation indication information is configured in the HE-SIG-B field, and the HE-SIG-B field includes a common part (English: Common Part) and a non-public part (English: Non-common Part). The common portion includes a first field and n second fields (denoted in FIG. 4D: subchannel allocation indication) to indicate which subchannel is a parallel link subchannel for D2D transmission. The non-public part includes description information corresponding to each subchannel. As shown in FIG. 4D, it is assumed that, in the subchannel allocation indication, the kth subchannel is indicated as a parallel link subchannel for D2D transmission, and the description information corresponding to the kth subchannel is configured in the non-common portion. The description information corresponding to the k subchannels includes identification information and transmission parameters corresponding to the kth subchannel. Of course, the signaling structure shown in FIG. 4D is only configured by using the resource allocation indication information in the HE-SIG-B field. When the resource allocation indication information is configured in the MAC payload of the trigger frame, the resource allocation in the MAC payload is configured. The indication information may also include a public part and a non-public part, and the related signaling structure is similar to the HE-SIG-B field, and details are not described herein again.

In addition, in order to facilitate the user equipment to read the description information corresponding to the subchannel in the subsequent process, the signaling length of the description information corresponding to each subchannel is a preset value.

Step 403: The AP provides resource allocation indication information to the user equipment.

In a possible implementation manner, the AP broadcasts resource allocation indication information to the outside. Correspondingly, The user equipment acquires resource allocation indication information sent by the AP. Then, the user equipment determines, according to the resource allocation indication information, the time-frequency resource occupied by the AP for the parallel link subchannel allocated for D2D transmission. Specifically, in this embodiment, after the user equipment acquires the resource allocation indication information, the following steps may be performed.

Step 404: The user equipment determines the total number n of subchannels according to the first field.

For example, the resource allocation indication information is configured in the HE-SIG-B field. The user equipment reads the first 3 bit signaling “010” from the common part of the HE-SIG-B field, and determines that the total number of subchannels is 3.

Step 405: The user equipment reads n second fields according to the total number n of subchannels.

Since the signaling length of each second field is 3 bits, after determining the total number n of subchannels, the user equipment reads the signaling of 3 nbit length after the first field, and the 3 nbit signaling includes n sequentially arranged in order. The second field. For example, after determining that the total number of subchannels is 3, the user equipment reads the signaling “000001100” whose length is 9 bits after “010”, and the 9-bit signaling includes three second fields that are sequentially arranged in order, that is, “000” "," "001" and "100".

Step 406: The user equipment determines, according to the n second fields, the number of RUs and the size of the bandwidth included in the parallel link subchannel.

After the user equipment reads the second field, the type of the subchannel indicated by each second field is obtained, and the corresponding channel parameter is obtained. For example, referring to Table 2 above, after the user equipment reads the three second fields of "000", "001", and "100", it can be determined that the subchannel indicated by "100" is used for D2D transmission. Parallel link subchannels and may determine that the parallel link subchannel is a 40 MHz parallel link subchannel containing a single RU.

In step 407, the user equipment performs D2D transmission on the parallel link subchannel.

Optionally, this step includes the following sub-steps:

First, the user equipment calculates the location of the description information corresponding to the parallel link subchannel.

In a possible implementation manner, if the protocol specifies that the signaling length of the description information corresponding to each subchannel is a preset value. Then, the user equipment can easily calculate the location of the description information corresponding to the parallel link subchannel according to the preset value and the sequence number of the parallel link subchannel.

For example, if the preset value is 10 bits, and the resource allocation indication information is configured in the HE-SIG-B field, the user equipment can obtain the 21st bit from the non-public part of the HE-SIG-B field. Initially, the decoding obtains the description information corresponding to the parallel link subchannel indicated by the third second field “100”.

Second, the user equipment reads the parallel chain according to the location of the description information corresponding to the parallel link subchannel. Description information corresponding to the subchannel.

The description information corresponding to the parallel link subchannel includes: identification information and transmission parameters corresponding to the parallel link subchannel. The identification information corresponding to the parallel link subchannel is used to indicate the user equipment to which the parallel link subchannel is allocated.

Third, the user equipment detects, according to the identification information in the description information corresponding to the parallel link subchannel, whether the parallel link subchannel is an AP allocated to the user equipment itself.

Fourth, if the parallel link subchannel is allocated for the user equipment itself, the user equipment performs D2D transmission on the parallel link subchannel according to the transmission parameter corresponding to the parallel link subchannel.

It should be noted that in this embodiment, since the parallel link subchannel for D2D transmission occupies all or part of the bandwidth of the channel occupied by the BSS established by the AP, the allocation indicated in the process of one resource allocation indication The parallel link subchannels may be one or more. When there are multiple parallel link subchannels allocated in the process of one resource allocation indication, the multiple parallel link subchannels are usually allocated by the AP for a plurality of pairs of different user equipments requesting D2D transmission. However, this embodiment does not limit that the multiple parallel link subchannels may be allocated by the AP for a pair of user equipments requesting D2D transmission.

In summary, the resource allocation indication method provided in this embodiment allocates, by the AP, a parallel link subchannel for D2D transmission for the user equipment that requests D2D transmission, and the parallel link subchannel occupies the BSS occupied by the AP. All or part of the bandwidth of the channel; solves the problem that the resource usage of the D2D transmission in the existing WLAN system is too single and lacks flexibility; the flexibility of resource allocation and scheduling is improved, and the reasonable scheduling of bandwidth resources is realized. use.

In this embodiment, the bandwidth of the parallel link subchannel for D2D transmission is also set to an integer multiple of 20 MHz, so that the method can be better applied to existing wireless standards.

In this embodiment, a simple and efficient signaling design scheme is also provided, which minimizes signaling overhead required for resource allocation indication information, and improves signaling indication efficiency.

Please refer to FIG. 5A, which is a flowchart of a resource allocation indication method according to another embodiment of the present invention. The resource allocation indication method can be applied to the implementation environment shown in FIG. 1. The resource allocation indication method may include the following steps:

Step 501: The AP allocates a parallel link subchannel for D2D transmission for the user equipment that requests the D2D transmission, and the parallel link subchannel occupies all or part of the bandwidth of the channel occupied by the BSS established by the AP.

Optionally, the bandwidth of the parallel link subchannel is an integer multiple of 20 MHz.

Step 502: The AP generates resource allocation indication information, where the resource allocation indication information is used to indicate time-frequency resources occupied by the parallel link subchannel.

In this embodiment, the resource allocation indication information includes: a first field, n third fields, and n fourth fields.

The first field is used to indicate the total number n of subchannels obtained by the AP dividing the channel occupied by the BSS it establishes. The ith third field is used to indicate the bandwidth size of the i-th subchannel. The ith fourth field is used to indicate the purpose of the i-th subchannel. Where 1 ≤ i ≤ n, and i and n are integers.

For the description of the first field, refer to the embodiment shown in FIG. 4A, which is not described in this embodiment.

The bandwidth is any one of 20 MHz bandwidth, 40 MHz bandwidth, 80 MHz bandwidth, and 160 MHz bandwidth, so the signaling length of the third field is 2 bits. In a possible implementation manner, the correspondence between the third field and the indicated bandwidth size may be as shown in Table-3 below:

Third field Bandwidth size 00 20MHz 01 40MHz 10 80MHz 11 160MHz

table 3

The purpose of the subchannel is for D2D transmission or for regular transmission, so the signaling length of the fourth field is 1 bit. In a possible implementation manner, the correspondence between the fourth field and its indicated use may be as shown in Table 4 below:

Fourth field Use of subchannels 0 For regular transmission 1 For D2D transmission

Table 4

Therefore, in conjunction with the following Table-5, in the present embodiment, eight different types of subchannels are defined according to the bandwidth size and usage, and the signaling of length 3 bits is also used to indicate one type of subchannel.

Third field Fourth field Subchannel type 00 0 20MHz regular link subchannel 00 1 20MHz parallel link subchannel

01 0 40MHz regular link subchannel 01 1 40MHz parallel link subchannel 10 0 80MHz regular link subchannel 10 1 80MHz parallel link subchannel 11 0 160MHz regular link subchannel 11 1 160MHz parallel link subchannel

table 5

The AP generates resource allocation indication information according to the actual channel allocation status. The resource allocation indication information includes: a first field, n third fields arranged in order, and n fourth fields arranged in order. The first field is located before the n third fields and the n fourth fields, and the ith third field corresponds to the ith fourth field. The ith third field is combined with the ith fourth field to indicate the type of the i-th subchannel.

In addition, the arrangement between the first field, the n third fields, and the n fourth fields includes, but is not limited to, the following possible situations:

(1) from the heading to the first field, n third fields and n fourth fields;

(2) from the heading to the first field, n fourth fields and n third fields;

(3) From the heading, the first field, the first third field, the first fourth field, the second third field, the second fourth field, ..., the nth third field, and the nth Fourth field

(4) From the heading, the first field, the first fourth field, the first third field, the second fourth field, the second third field, ..., the nth fourth field, and the nth The third field.

Referring to FIG. 5B, a transmission diagram related to the embodiment is shown. Assuming that the bandwidth occupied by the BSS established by the AP is 160 MHz, the AP divides the channel into four subchannels, which are: 20 MHz conventional link subchannel 51, 20 MHz parallel link subchannel 52, 40 MHz conventional chain. Path subchannel 53 and 80 MHz parallel link subchannel 54. Then, as shown in FIG. 5C, the first field is “011”, which is used to indicate that the total number of subchannels is 4. Taking the arrangement in the above (1) as an example, the first field is followed by four third fields in order, which are respectively "00", "00", "01", and "10" for indicating the above. The bandwidth of the 4 subchannels. The four fourth fields are sequentially arranged in order, followed by "0", "1", "0", and "1", respectively, for indicating the use of the above four subchannels.

Similarly, the resource allocation indication information may further include: description information corresponding to each subchannel. For the content of this part, refer to the description and description in the embodiment shown in FIG. 4A, which is not described in this embodiment. Another In addition, the signaling structure of the resource allocation indication information is also referred to the introduction and description in the embodiment shown in FIG. 4A.

Step 503: The AP provides resource allocation indication information to the user equipment.

Correspondingly, the user equipment acquires resource allocation indication information sent by the AP. Then, the user equipment determines, according to the resource allocation indication information, the time-frequency resource occupied by the AP for the parallel link subchannel allocated for D2D transmission. Specifically, in this embodiment, after the user equipment acquires the resource allocation indication information, the following steps may be performed.

Step 504: The user equipment determines the total number n of subchannels according to the first field.

For example, the resource allocation indication information is configured in the HE-SIG-B field, and the user equipment reads the first 3 bit signaling “011” from the common part of the HE-SIG-B field, and determines that the total number of subchannels is 4.

Step 505: The user equipment reads n third fields and n fourth fields according to the total number n of subchannels.

The signaling length of each third field is 2 bits, and the signaling length of each fourth field is 1 bit. After determining the total number of subchannels n, the user equipment reads the signaling of 3nbit length after the first field. The 3nbit signaling includes n third fields arranged in order and n fourth fields arranged in order. For example, after determining that the total number of subchannels is 4, the user equipment reads the signaling “000001100101” having a length of 12 bits after “011”. The 12-bit signaling includes: four third fields arranged in order, namely, "00", "00", "01", and "10"; and four fourth fields arranged in order, that is, " 0", "1", "0" and "1".

Step 506: The user equipment determines, according to the n third fields and the n fourth fields, a bandwidth of the parallel link subchannel.

The user equipment determines the type of each subchannel according to the correspondence and arrangement between the third field and the fourth field pre-agreed by the protocol, that is, determines the bandwidth size and usage of each subchannel. For example, after referring to the foregoing Table-5, after the user equipment reads the four third fields and the fourth fourth field, it can determine that the subchannel indicated by the second third field and the second fourth field is The 20 MHz parallel link subchannel for D2D transmission, the subchannel indicated by the 4th third field and the 4th fourth field is an 80 MHz parallel link subchannel for D2D transmission.

In step 507, the user equipment performs D2D transmission on the parallel link subchannel.

Optionally, when the resource allocation indication information indicates that the allocated parallel link subchannels are multiple, the user equipment may determine, according to the identifier information included in the description information corresponding to each parallel link subchannel, that the AP is the local end. Assigned parallel link subchannels.

In summary, the resource allocation indication method provided by this embodiment is configured to request D2D transmission through an AP. The user equipment allocates a parallel link subchannel for D2D transmission, the parallel link subchannel occupies all or part of the bandwidth of the channel occupied by the BSS established by the AP; and solves the resources for D2D transmission in the existing WLAN system The use is too singular and lacks flexibility; the flexibility of resource allocation and scheduling is improved, and the rational scheduling and utilization of bandwidth resources is realized.

In addition, the signaling design provided by the embodiment only needs 3 bit signaling to indicate the bandwidth size and usage of the subchannel, minimize the signaling overhead required for the resource allocation indication information, and improve the signaling indication. effectiveness.

The resource allocation indication scheme and the corresponding signaling design scheme provided by the embodiments of the present invention are applicable to other transmission scenarios or communication application scenarios, and are not limited by the present invention. .

The following is an embodiment of the apparatus of the present invention, which can be used to carry out the method embodiments of the present invention. For details not disclosed in the embodiment of the device of the present invention, please refer to the method embodiment of the present invention.

Please refer to FIG. 6, which is a block diagram of a resource allocation indication apparatus according to an embodiment of the present invention. The resource allocation indication means is applicable to an AP in a WLAN system. The resource allocation indication means may include: an allocation module 610, a generating module 620, and a providing module 630.

The allocating module 610 is configured to allocate, for the user equipment that requests the D2D transmission, a parallel link subchannel for D2D transmission, where the parallel link subchannel occupies all or part of the bandwidth of the channel occupied by the BSS established by the AP.

The generating module 620 is configured to generate resource allocation indication information, where the resource allocation indication information is used to indicate time-frequency resources occupied by the parallel link subchannel allocated by the allocating module 610.

The providing module 630 is configured to provide the resource allocation indication information generated by the generating module 620 to the user equipment, where the user equipment may perform D2D on the parallel link subchannel according to the resource allocation indication information. transmission.

In summary, the resource allocation indication apparatus provided in this embodiment allocates, by the AP, a parallel link subchannel for D2D transmission for the user equipment that requests D2D transmission, and the parallel link subchannel occupies the BSS occupied by the AP. All or part of the bandwidth of the channel; solves the problem that the resource usage of the D2D transmission in the existing WLAN system is too single and lacks flexibility; the flexibility of resource allocation and scheduling is improved, and the reasonable scheduling of bandwidth resources is realized. use.

In an alternative embodiment based on the embodiment shown in Figure 6, the bandwidth of the parallel link subchannel It is an integer multiple of 20MHz.

In the optional embodiment provided by the embodiment shown in FIG. 6, the resource allocation indication information includes: a first field and n second fields; the first field is used to indicate that the AP occupies the BSS The total number of subchannels obtained by channel division is n; the ith second field is used to indicate the type of the i th subchannel; one type corresponds to a set of channel parameters, and each set of channel parameters includes: a resource unit included in the subchannel The number, bandwidth, and use of RU; where 1 ≤ i ≤ n, i and n are integers.

In an optional embodiment provided based on the embodiment shown in FIG. 6, the channel parameters include:

Contains multiple RUs, 20MHz bandwidth and is used for regular transmission; or,

Contains a single RU, 20MHz bandwidth and is used for regular transmission; or,

Includes a single RU, 20MHz bandwidth and is used for D2D transmission; or,

Contains a single RU, 40MHz bandwidth and is used for regular transmission; or,

Includes a single RU, 40MHz bandwidth and is used for D2D transmission; or,

Contains a single RU, 80MHz bandwidth and is used for regular transmission; or,

Includes a single RU, 80MHz bandwidth and is used for D2D transmission; or,

Includes a single RU, 160MHz bandwidth and is used for D2D transmission.

In the optional embodiment provided by the embodiment shown in FIG. 6, the resource allocation indication information includes: a first field, n third fields, and n fourth fields; the first field is used to indicate an AP The total number n of subchannels obtained by dividing the channel occupied by the BSS; the i th third field is used to indicate the bandwidth size of the i th subchannel; the i th fourth field is used to indicate the i th subchannel Use; wherein 1 ≤ i ≤ n, i and n are integers.

In an alternative embodiment provided based on the embodiment illustrated in Figure 6, the bandwidth is any one of a 20 MHz bandwidth, a 40 MHz bandwidth, an 80 MHz bandwidth, and a 160 MHz bandwidth; the use is for D2D transmission or for conventional transmission.

In the optional embodiment provided by the embodiment shown in FIG. 6, the resource allocation indication information further includes: description information corresponding to each subchannel, and the signaling length of the description information corresponding to each subchannel is a preset value; the description information corresponding to the ith subchannel includes the identifier information and the transmission parameter corresponding to the ith subchannel, and the identifier information corresponding to the ith subchannel is used to indicate that the ith subchannel is allocated User equipment given.

In summary, the method can be better adapted to existing wireless standards by setting the bandwidth of the parallel link subchannel for D2D transmission to an integer multiple of 20 MHz.

In addition, two simple and efficient signaling designs are provided to minimize resource allocation. The signaling overhead required for the indication information improves the signaling indication efficiency.

Please refer to FIG. 7A, which is a block diagram of a resource allocation indication apparatus according to another embodiment of the present invention. The resource allocation indication device is applicable to user equipment in a WLAN system. The resource allocation indicating means may include: an obtaining module 710, a determining module 720, and a transmitting module 730.

The obtaining module 710 is configured to obtain resource allocation indication information sent by the AP.

a determining module 720, configured to determine, according to the resource allocation indication information acquired by the acquiring module 710, a time-frequency resource occupied by the AP for the parallel link subchannel allocated by the user equipment for D2D transmission; The parallel link subchannel occupies all or part of the bandwidth of the channel occupied by the BSS established by the AP.

The transmitting module 730 is configured to perform D2D transmission on the parallel link subchannel determined by the determining module 720.

In summary, the resource allocation indication apparatus provided in this embodiment allocates, by the AP, a parallel link subchannel for D2D transmission for the user equipment that requests D2D transmission, and the parallel link subchannel occupies the BSS occupied by the AP. All or part of the bandwidth of the channel; solves the problem that the resource usage of the D2D transmission in the existing WLAN system is too single and lacks flexibility; the flexibility of resource allocation and scheduling is improved, and the reasonable scheduling of bandwidth resources is realized. use.

In an alternative embodiment provided based on the embodiment illustrated in Figure 7A, the bandwidth of the parallel link subchannel is an integer multiple of 20 MHz.

In the optional embodiment provided by the embodiment shown in FIG. 7A, the resource allocation indication information includes: a first field and n second fields; the first field is used to indicate that the AP will use the BSS The total number of subchannels obtained by the occupied channel division is n; the ith second field is used to indicate the type of the i th subchannel; one type corresponds to a set of channel parameters, and each set of channel parameters includes: the subchannel includes The number of resource units RU, the size of the bandwidth, and the use; wherein, 1 ≤ i ≤ n, i and n are integers.

Correspondingly, as shown in FIG. 7B, the determining module 720 includes: a first determining unit 720a, a first reading unit 720b, and a second determining unit 720c.

The first determining unit 720a is configured to determine a total number n of the subchannels according to the first field.

The first reading unit 720b is configured to read the n second fields according to the total number n of the subchannels determined by the first determining unit 720a.

The second determining unit 720c is configured to determine, according to the n second fields read by the first reading unit 720b, the number of RUs and the size of the bandwidth included in the parallel link subchannel.

In the optional embodiment provided by the embodiment shown in FIG. 7A, the resource allocation indication information includes: a first field, n third fields, and n fourth fields; the first field is used to indicate The total number n of subchannels obtained by dividing the channel occupied by the BSS by the AP; the i th third field is used to indicate the bandwidth size of the i th subchannel; the i th fourth field is used to indicate the i th sub The use of the channel; wherein 1 ≤ i ≤ n, i and n are integers.

Correspondingly, as shown in FIG. 7C, the determining module 720 includes: a first determining unit 720a, a second reading unit 720d, and a third determining unit 720e.

The first determining unit 720a is configured to determine a total number n of the subchannels according to the first field.

The second reading unit 720d is configured to read the n third fields and the n fourth fields according to the total number n of the subchannels determined by the first determining unit 720a.

The third determining unit 720e is configured to determine a bandwidth size of the parallel link subchannel according to the n third fields and the n fourth fields read by the second reading unit 720d.

In the optional embodiment provided by the embodiment shown in FIG. 7A, the resource allocation indication information further includes: description information corresponding to each subchannel, and the signaling length of the description information corresponding to each subchannel is a preset value; the description information corresponding to the ith subchannel includes the identifier information and the transmission parameter corresponding to the ith subchannel.

Accordingly, as shown in FIG. 7D, the transmission module 730 includes a calculation unit 730a, an information reading unit 730b, a detection unit 730c, and a transmission unit 730d.

The calculating unit 730a is configured to calculate a location of the description information corresponding to the parallel link subchannel.

The information reading unit 730b is configured to read the description information corresponding to the parallel link subchannel according to the location of the description information corresponding to the parallel link subchannel calculated by the calculating unit 730a.

The detecting unit 730c is configured to detect, according to the identifier information in the description information corresponding to the parallel link subchannel read by the information reading unit 730b, whether the parallel link subchannel is the AP Described by the user equipment.

The transmitting unit 730d is configured to, when the detecting unit 730c detects that the parallel link subchannel is allocated for the user equipment, according to the transmission parameter corresponding to the parallel link subchannel, in the parallel D2D transmission is performed on the link subchannel.

In summary, the method can be better adapted to existing wireless standards by setting the bandwidth of the parallel link subchannel for D2D transmission to an integer multiple of 20 MHz.

In addition, two simple and efficient signaling design schemes are provided, which minimizes the signaling overhead required for resource allocation indication information and improves signaling indication efficiency.

It should be noted that, in the foregoing device embodiments, only the division of the above functional modules is illustrated. In actual applications, the function allocation may be completed by different functional modules according to requirements, that is, the internal structure of the device is divided. Different functional modules to complete all or part of the functions described above. In addition, the resource allocation indication device provided by the foregoing embodiment is the same as the method embodiment of the resource allocation indication method, and the specific implementation process is described in detail in the method embodiment, and details are not described herein again.

Please refer to FIG. 8, which is a block diagram of a resource allocation indication system provided by an embodiment of the present invention. The resource allocation indication system includes: an AP 810 and a plurality of user equipments 820.

The AP 810 includes resource allocation indication means as provided by the embodiment shown in FIG. 6 above or based on the alternative embodiment provided by the embodiment shown in FIG. 6.

The user equipment 820 includes resource allocation indication means as provided by the embodiment shown in FIG. 7A above or based on the alternative embodiment provided by the embodiment shown in FIG. 7A.

Please refer to FIG. 9, which is a structural block diagram of an AP according to an embodiment of the present invention. As shown in FIG. 9, the AP 900 includes a bus 910, and a processor 920, a memory 930, and a transceiver 940 that communicate via a bus 910. Memory 930 is for storing one or more instructions that are configured to be executed by processor 920. among them:

The processor 920 is configured to allocate, for a user equipment that requests D2D transmission, a parallel link subchannel for D2D transmission, where the parallel link subchannel occupies all or part of a bandwidth of a channel occupied by the BSS established by the AP. .

The processor 920 is further configured to generate resource allocation indication information, where the resource allocation indication information is used to indicate time-frequency resources occupied by the parallel link subchannel.

The processor 920 is further configured to control the transceiver 940 to provide the resource allocation indication information to the user equipment, where the user equipment may be located on the parallel link subchannel according to the resource allocation indication information. Perform D2D transmission.

In summary, the AP provided in this embodiment allocates a parallel link subchannel for D2D transmission for the user equipment that requests D2D transmission, and the parallel link subchannel occupies all the channels occupied by the BSS established by the AP. Or partial bandwidth; solves the problem of D2D transmission in the existing WLAN system The use of resources is too singular and lacks flexibility; the flexibility of resource allocation and scheduling is improved, and the rational scheduling and utilization of bandwidth resources is realized.

In an alternative embodiment provided based on the embodiment shown in Figure 9, the bandwidth of the parallel link subchannel is an integer multiple of 20 MHz.

In the optional embodiment provided by the embodiment shown in FIG. 9, the resource allocation indication information includes: a first field and n second fields; the first field is used to indicate that the AP occupies the BSS The total number of subchannels obtained by channel division is n; the ith second field is used to indicate the type of the i th subchannel; one type corresponds to a set of channel parameters, and each set of channel parameters includes: a resource unit included in the subchannel The number, bandwidth, and use of RU; where 1 ≤ i ≤ n, i and n are integers.

In an optional embodiment provided based on the embodiment shown in FIG. 9, the channel parameters include:

Contains multiple RUs, 20MHz bandwidth and is used for regular transmission; or,

Contains a single RU, 20MHz bandwidth and is used for regular transmission; or,

Includes a single RU, 20MHz bandwidth and is used for D2D transmission; or,

Contains a single RU, 40MHz bandwidth and is used for regular transmission; or,

Includes a single RU, 40MHz bandwidth and is used for D2D transmission; or,

Contains a single RU, 80MHz bandwidth and is used for regular transmission; or,

Includes a single RU, 80MHz bandwidth and is used for D2D transmission; or,

Includes a single RU, 160MHz bandwidth and is used for D2D transmission.

In the optional embodiment provided by the embodiment shown in FIG. 9, the resource allocation indication information includes: a first field, n third fields, and n fourth fields; the first field is used to indicate an AP The total number n of subchannels obtained by dividing the channel occupied by the BSS; the i th third field is used to indicate the bandwidth size of the i th subchannel; the i th fourth field is used to indicate the i th subchannel Use; wherein 1 ≤ i ≤ n, i and n are integers.

In an alternative embodiment provided based on the embodiment shown in Figure 9, the bandwidth is any one of a 20 MHz bandwidth, a 40 MHz bandwidth, an 80 MHz bandwidth, and a 160 MHz bandwidth; the use is for D2D transmission or for conventional transmission.

In the optional embodiment provided by the embodiment shown in FIG. 9, the resource allocation indication information further includes: description information corresponding to each subchannel, and the signaling length of the description information corresponding to each subchannel is a preset value; the description information corresponding to the ith subchannel includes the identifier information and the transmission parameter corresponding to the ith subchannel, and the identifier information corresponding to the ith subchannel is used to indicate that the ith subchannel is allocated User equipment given.

Please refer to FIG. 10, which is a structural block diagram of a user equipment according to an embodiment of the present invention. As shown in FIG. 10, user equipment 1000 includes a bus 1010, and a processor 1020, a memory 1030, and a transceiver 1040 that communicate over a bus 1010. Memory 1030 is for storing one or more instructions that are configured to be executed by processor 1020. among them:

The processor 1020 is configured to control the transceiver 1040 to obtain resource allocation indication information sent by the AP.

The processor 1020 is further configured to determine, according to the resource allocation indication information, a time-frequency resource occupied by the AP for the parallel link subchannel allocated by the user equipment for D2D transmission; wherein the parallel chain The way subchannel occupies all or part of the bandwidth of the channel occupied by the BSS established by the AP.

The processor 1020 is further configured to control the transceiver 1040 to perform D2D transmission on the parallel link subchannel.

In summary, in this embodiment, the user equipment that requests D2D transmission is allocated by the AP to the parallel link subchannel for D2D transmission, and the parallel link subchannel occupies all the channels occupied by the BSS established by the AP. Or partial bandwidth; solves the problem that the resource usage mode for D2D transmission in the existing WLAN system is too single and lacks flexibility; the flexibility of resource allocation and scheduling is improved, and the reasonable scheduling and utilization of bandwidth resources is realized.

In an alternative embodiment provided based on the embodiment shown in FIG. 10, the bandwidth of the parallel link subchannel is an integer multiple of 20 MHz.

In the optional embodiment provided by the embodiment shown in FIG. 10, the resource allocation indication information includes: a first field and n second fields; the first field is used to indicate that the AP will use the BSS The total number of subchannels obtained by the occupied channel division is n; the ith second field is used to indicate the type of the i th subchannel; one type corresponds to a set of channel parameters, and each set of channel parameters includes: the subchannel includes The number of resource units RU, the size of the bandwidth, and the use; wherein, 1 ≤ i ≤ n, i and n are integers.

Correspondingly, the processor 1020 is specifically configured to:

Determining a total number n of the subchannels according to the first field;

Reading the n second fields according to the total number n of the subchannels;

And determining, according to the n second fields, the number of RUs and the size of the bandwidth included in the parallel link subchannel.

In an optional embodiment provided based on the embodiment shown in FIG. 10, the resource allocation indication information, The first field, the n third field, and the n fourth fields; the first field is used to indicate the total number n of subchannels obtained by the AP to divide the channel occupied by the BSS; The three fields are used to indicate the bandwidth size of the i th subchannel; the i th fourth field is used to indicate the use of the i th subchannel; wherein 1 ≤ i ≤ n, i and n are integers.

Correspondingly, the processor 1020 is specifically configured to:

Determining a total number n of the subchannels according to the first field;

Reading the n third fields and the n fourth fields according to the total number n of the subchannels;

Determining a bandwidth size of the parallel link subchannel according to the n third fields and the n fourth fields.

In the optional embodiment provided by the embodiment shown in FIG. 10, the resource allocation indication information further includes: description information corresponding to each subchannel, and the signaling length of the description information corresponding to each subchannel is a preset value; the description information corresponding to the ith subchannel includes the identifier information and the transmission parameter corresponding to the ith subchannel.

The user equipment 1020 is specifically configured to:

Calculating a location of the description information corresponding to the parallel link subchannel;

Reading the description information corresponding to the parallel link subchannel according to the location of the description information corresponding to the parallel link subchannel;

Determining, according to the identifier information in the description information corresponding to the parallel link subchannel, whether the parallel link subchannel is allocated by the AP to the user equipment;

When the parallel link subchannel is allocated for the user equipment, the transceiver 1040 is controlled to perform D2D transmission on the parallel link subchannel according to a transmission parameter corresponding to the parallel link subchannel.

It is to be understood that the singular forms "a", "the", "the" It should also be understood that "and/or" as used herein is meant to include any and all possible combinations of one or more of the associated listed items.

The serial numbers of the embodiments of the present invention are merely for the description, and do not represent the advantages and disadvantages of the embodiments.

Those skilled in the art can 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 above mentioned storage medium 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 (37)

A method for indicating a resource allocation in a WLAN system of a wireless local area network, the method comprising: The access point AP allocates a parallel link subchannel for D2D transmission for the user equipment requesting D2D transmission, and the parallel link subchannel occupies all or part of the bandwidth of the channel occupied by the basic service set BSS established by the AP; The AP generates resource allocation indication information, where the resource allocation indication information is used to indicate time-frequency resources occupied by the parallel link subchannel; The AP provides the resource allocation indication information to the user equipment. The method of claim 1 wherein the bandwidth of the parallel link subchannel is an integer multiple of 20 MHz. The method according to claim 1 or 2, wherein the resource allocation indication information comprises: a first field and n second fields; The first field is used to indicate the total number n of subchannels obtained by the AP dividing the channel occupied by the BSS; The i-th second field is used to indicate the type of the i-th sub-channel; one type corresponds to a set of channel parameters, and each set of channel parameters includes: the number of resource units RU included in the sub-channel, the bandwidth size, and the use; Where 1 ≤ i ≤ n, and i and n are integers. The method of claim 3 wherein said channel parameters comprise: Contains multiple RUs, 20MHz bandwidth and is used for regular transmission; or, Contains a single RU, 20MHz bandwidth and is used for regular transmission; or, Includes a single RU, 20MHz bandwidth and is used for D2D transmission; or, Contains a single RU, 40MHz bandwidth and is used for regular transmission; or, Includes a single RU, 40MHz bandwidth and is used for D2D transmission; or, Contains a single RU, 80MHz bandwidth and is used for regular transmission; or, Includes a single RU, 80MHz bandwidth and is used for D2D transmission; or, Includes a single RU, 160MHz bandwidth and is used for D2D transmission. The method according to claim 1 or 2, wherein the resource allocation indication information comprises: a first field, n third fields, and n fourth fields; The first field is used to indicate the total number n of subchannels obtained by the AP dividing the channel occupied by the BSS; The i th third field is used to indicate the bandwidth size of the i th subchannel; The i-th fourth field is used to indicate the use of the i-th sub-channel; Where 1 ≤ i ≤ n, and i and n are integers. The method of claim 5 wherein: The bandwidth is any one of a 20 MHz bandwidth, a 40 MHz bandwidth, an 80 MHz bandwidth, and a 160 MHz bandwidth; The use is for D2D transmission or for regular transmission. The method according to claim 3 or 5, wherein the resource allocation indication information further includes: description information corresponding to each subchannel, and the signaling length of the description information corresponding to each subchannel is pre Set value The description information corresponding to the ith subchannel includes the identifier information and the transmission parameter corresponding to the ith subchannel, and the identifier information corresponding to the ith subchannel is used to indicate the user equipment to which the ith subchannel is allocated. . A method for indicating a resource allocation in a WLAN system of a wireless local area network, the method comprising: The user equipment acquires resource allocation indication information sent by the access point AP; Determining, by the user equipment, time-frequency resources occupied by the parallel link subchannel for D2D transmission allocated by the AP for the user equipment, according to the resource allocation indication information, where the parallel link subchannel occupation Describe all or part of the bandwidth of the channel occupied by the basic service set BSS established by the AP; The user equipment performs D2D transmission on the parallel link subchannel. The method of claim 8 wherein the bandwidth of the parallel link subchannel is an integer multiple of 20 MHz. The method according to claim 8 or 9, wherein the resource allocation indication information comprises: a first field and n second fields; The first field is used to indicate the total number n of subchannels obtained by the AP to divide the channel occupied by the BSS; the second i field is used to indicate the type of the i th subchannel; one type corresponds to one Group channel parameters, each group of channel parameters includes: the number of resource units RU included in the subchannel, the bandwidth size, and the use; wherein, 1≤i≤n, i and n are integers; Determining, by the user equipment, the time-frequency resource occupied by the parallel link subchannel for D2D transmission allocated by the AP for the user equipment, according to the resource allocation indication information, including: Determining, by the user equipment, the total number n of the subchannels according to the first field; The user equipment reads the n second fields according to the total number n of the subchannels; The user equipment determines, according to the n second fields, the number of RUs and the size of the bandwidth included in the parallel link subchannel. The method according to claim 8 or 9, wherein the resource allocation indication information comprises: a first field, n third fields, and n fourth fields; The first field is used to indicate the total number n of subchannels obtained by the AP to divide the channel occupied by the BSS; the i th third field is used to indicate the bandwidth of the i th subchannel; the i th fourth a field is used to indicate the use of the i-th subchannel; wherein, 1≤i≤n, i and n are integers; Determining, by the user equipment, the time-frequency resource occupied by the parallel link subchannel for D2D transmission allocated by the AP for the user equipment, according to the resource allocation indication information, including: Determining, by the user equipment, the total number n of the subchannels according to the first field; The user equipment reads the n third fields and the n fourth fields according to the total number n of the subchannels; And determining, by the user equipment, a bandwidth size of the parallel link subchannel according to the n third fields and the n fourth fields. The method according to claim 10 or 11, wherein the resource allocation indication information further includes: description information corresponding to each subchannel, and the signaling length of the description information corresponding to each subchannel is pre And the description information corresponding to the ith subchannel includes the identifier information and the transmission parameter corresponding to the ith subchannel; The user equipment performs D2D transmission on the parallel link subchannel, including: The user equipment calculates a location of the description information corresponding to the parallel link subchannel; Reading, by the user equipment, description information corresponding to the parallel link subchannel according to a location of the description information corresponding to the parallel link subchannel; The user equipment detects, according to the identifier information in the description information corresponding to the parallel link subchannel, whether the parallel link subchannel is allocated by the AP as the user equipment; If the parallel link subchannel is allocated for the user equipment, the user equipment performs D2D transmission on the parallel link subchannel according to a transmission parameter corresponding to the parallel link subchannel. A resource allocation indication apparatus for use in a WLAN system of a wireless local area network, characterized in that the apparatus comprises: An allocation module, configured to allocate, for a user equipment requesting D2D transmission, a parallel link subchannel for D2D transmission, the parallel link subchannel occupies all or part of a channel occupied by a basic service set BSS established by the access point AP bandwidth; a generating module, configured to generate resource allocation indication information, where the resource allocation indication information is used to indicate a time-frequency resource occupied by the parallel link subchannel; And providing a module, configured to provide the resource allocation indication information to the user equipment. The apparatus of claim 13 wherein said parallel link subchannel has a bandwidth that is an integer multiple of 20 MHz. The device according to claim 13 or 14, wherein the resource allocation indication information comprises: a first field and n second fields; The first field is used to indicate the total number n of subchannels obtained by the AP dividing the channel occupied by the BSS; The i-th second field is used to indicate the type of the i-th sub-channel; one type corresponds to a set of channel parameters, and each set of channel parameters includes: the number of resource units RU included in the sub-channel, the bandwidth size, and the use; Where 1 ≤ i ≤ n, and i and n are integers. The apparatus of claim 15 wherein said channel parameters comprise: Contains multiple RUs, 20MHz bandwidth and is used for regular transmission; or, Contains a single RU, 20MHz bandwidth and is used for regular transmission; or, Includes a single RU, 20MHz bandwidth and is used for D2D transmission; or, Contains a single RU, 40MHz bandwidth and is used for regular transmission; or, Includes a single RU, 40MHz bandwidth and is used for D2D transmission; or, Contains a single RU, 80MHz bandwidth and is used for regular transmission; or, Includes a single RU, 80MHz bandwidth and is used for D2D transmission; or, Includes a single RU, 160MHz bandwidth and is used for D2D transmission. The device according to claim 13 or 14, wherein the resource allocation indication information comprises: a first field, n third fields, and n fourth fields; The first field is used to indicate the total number n of subchannels obtained by the AP dividing the channel occupied by the BSS; The i th third field is used to indicate the bandwidth size of the i th subchannel; The i-th fourth field is used to indicate the use of the i-th sub-channel; Where 1 ≤ i ≤ n, and i and n are integers. The device of claim 17 wherein: The bandwidth is any one of a 20 MHz bandwidth, a 40 MHz bandwidth, an 80 MHz bandwidth, and a 160 MHz bandwidth; The use is for D2D transmission or for regular transmission. The device according to claim 15 or 17, wherein the resource allocation indication information further includes: description information corresponding to each subchannel, and the signaling length of the description information corresponding to each subchannel is pre Set value The description information corresponding to the ith subchannel includes the identifier information and the transmission parameter corresponding to the ith subchannel, and the identifier information corresponding to the ith subchannel is used to indicate the user equipment to which the ith subchannel is allocated. . A resource allocation indication apparatus for use in a WLAN system of a wireless local area network, characterized in that the apparatus comprises: An obtaining module, configured to obtain resource allocation indication information sent by the access point AP; a determining module, configured to determine, according to the resource allocation indication information, a time-frequency resource occupied by the AP for the parallel link subchannel allocated by the user equipment for D2D transmission; wherein the parallel link subchannel occupies the All or part of the bandwidth of the channel occupied by the BSS by the basic service set established by the AP; And a transmission module, configured to perform D2D transmission on the parallel link subchannel. The apparatus of claim 20 wherein the bandwidth of the parallel link subchannel is an integer multiple of 20 MHz. The device according to claim 20 or 21, wherein the resource allocation indication information comprises: a first field and n second fields; The first field is used to indicate the total number n of subchannels obtained by the AP to divide the channel occupied by the BSS; the second i field is used to indicate the type of the i th subchannel; one type corresponds to one Group channel parameters, each group of channel parameters includes: the number of resource units RU included in the subchannel, the bandwidth size, and the use; wherein, 1≤i≤n, i and n are integers; The determining module includes: a first determining unit, a first reading unit, and a second determining unit; The first determining unit is configured to determine a total number n of the subchannels according to the first field; The first reading unit is configured to read the n second fields according to the total number n of the subchannels; The second determining unit is configured to determine, according to the n second fields, the number of RUs and the size of the bandwidth included in the parallel link subchannel. The device according to claim 20 or 21, wherein the resource allocation indication information comprises: a first field, n third fields, and n fourth fields; The first field is used to indicate the total number n of subchannels obtained by the AP to divide the channel occupied by the BSS; the i th third field is used to indicate the bandwidth of the i th subchannel; the i th fourth a field is used to indicate the use of the i-th subchannel; wherein, 1≤i≤n, i and n are integers; The determining module includes: a first determining unit, a second reading unit, and a third determining unit; The first determining unit is configured to determine a total number n of the subchannels according to the first field; The second reading unit is configured to read the n third fields and the n fourth fields according to the total number n of the subchannels; The third determining unit is configured to determine, according to the n third fields and the n fourth fields, a bandwidth size of the parallel link subchannel. The device according to claim 22 or 23, wherein the resource allocation indication information further includes: description information corresponding to each subchannel, and the signaling length of the description information corresponding to each subchannel is pre And the description information corresponding to the ith subchannel includes the identifier information and the transmission parameter corresponding to the ith subchannel; The transmission module includes: a calculation unit, an information reading unit, a detection unit, and a transmission unit; The calculating unit is configured to calculate a location of the description information corresponding to the parallel link subchannel; The information reading unit is configured to read, according to a location of the description information corresponding to the parallel link subchannel, description information corresponding to the parallel link subchannel; The detecting unit is configured to detect, according to the identifier information in the description information corresponding to the parallel link subchannel, whether the parallel link subchannel is allocated by the AP to the user equipment; The transmitting unit is configured to perform D2D transmission on the parallel link subchannel according to a transmission parameter corresponding to the parallel link subchannel when the parallel link subchannel is allocated for the user equipment. . A user equipment, characterized in that the user equipment comprises a resource allocation indication means for use in a wireless local area network (WLAN) system as claimed in any one of claims 20 to 24. An access point AP, characterized in that the AP comprises: a processor, a memory and a transceiver, the memory for storing one or more instructions, the instructions being configured to be executed by the processor; The processor, configured to allocate, for a user equipment that requests D2D transmission, a parallel link subchannel for D2D transmission, where the parallel link subchannel occupies all or a channel occupied by a basic service set BSS established by the AP Partial bandwidth The processor is further configured to generate resource allocation indication information, where the resource allocation indication information is used to indicate a time-frequency resource occupied by the parallel link subchannel; The processor is further configured to control the transceiver to provide the resource allocation indication information to the user equipment. The AP according to claim 26, wherein the bandwidth of the parallel link subchannel is an integer multiple of 20 MHz. The AP according to claim 26 or 27, wherein the resource allocation indication information comprises: a first field and n second fields; The first field is used to indicate the total number n of subchannels obtained by the AP dividing the channel occupied by the BSS; The i-th second field is used to indicate the type of the i-th sub-channel; one type corresponds to a set of channel parameters, and each set of channel parameters includes: the number of resource units RU included in the sub-channel, the bandwidth size, and the use; Where 1 ≤ i ≤ n, and i and n are integers. The AP according to claim 28, wherein the channel parameters comprise: Contains multiple RUs, 20MHz bandwidth and is used for regular transmission; or, Contains a single RU, 20MHz bandwidth and is used for regular transmission; or, Includes a single RU, 20MHz bandwidth and is used for D2D transmission; or, Contains a single RU, 40MHz bandwidth and is used for regular transmission; or, Includes a single RU, 40MHz bandwidth and is used for D2D transmission; or, Contains a single RU, 80MHz bandwidth and is used for regular transmission; or, Includes a single RU, 80MHz bandwidth and is used for D2D transmission; or, Includes a single RU, 160MHz bandwidth and is used for D2D transmission. The AP according to claim 26 or 27, wherein the resource allocation indication information comprises: a first field, n third fields, and n fourth fields; The first field is used to indicate the total number n of subchannels obtained by the AP dividing the channel occupied by the BSS; The i th third field is used to indicate the bandwidth size of the i th subchannel; The i-th fourth field is used to indicate the use of the i-th sub-channel; Where 1 ≤ i ≤ n, and i and n are integers. The AP according to claim 30, characterized in that The bandwidth is any one of a 20 MHz bandwidth, a 40 MHz bandwidth, an 80 MHz bandwidth, and a 160 MHz bandwidth; The use is for D2D transmission or for regular transmission. The AP according to claim 28 or 30, wherein the resource allocation indication information further includes: description information corresponding to each subchannel, and the signaling length of the description information corresponding to each subchannel is pre Set value The description information corresponding to the ith subchannel includes the identifier information and the transmission parameter corresponding to the ith subchannel, and the identifier information corresponding to the ith subchannel is used to indicate the user equipment to which the ith subchannel is allocated. . A user equipment, comprising: a processor, a memory, and a transceiver, the memory for storing one or more instructions, the instructions being configured to be executed by the processor; The processor is configured to control the transceiver to acquire resource allocation indication information sent by an access point AP; The processor is further configured to determine, according to the resource allocation indication information, a time-frequency resource occupied by the parallel link subchannel allocated by the AP for the D2D transmission allocated by the AP, where the parallel link The subchannel occupies all or part of the bandwidth of the channel occupied by the basic service set BSS established by the AP; The processor is further configured to control the transceiver to perform D2D transmission on the parallel link subchannel. The user equipment according to claim 33, wherein the bandwidth of the parallel link subchannel is an integer multiple of 20 MHz. The user equipment according to claim 33 or 34, wherein the resource allocation indication information comprises: a first field and n second fields; The first field is used to indicate the total number n of subchannels obtained by the AP to divide the channel occupied by the BSS; the second i field is used to indicate the type of the i th subchannel; one type corresponds to one Group channel parameters, each group of channel parameters includes: the number of resource units RU included in the subchannel, the bandwidth size, and the use; wherein, 1≤i≤n, i and n are integers; The processor is specifically configured to: Determining a total number n of the subchannels according to the first field; Reading the n second fields according to the total number n of the subchannels; And determining, according to the n second fields, the number of RUs and the size of the bandwidth included in the parallel link subchannel. The user equipment according to claim 33 or 34, wherein the resource allocation indication information comprises: a first field, n third fields, and n fourth fields; The first field is used to indicate the total number n of subchannels obtained by the AP to divide the channel occupied by the BSS; the i th third field is used to indicate the bandwidth of the i th subchannel; the i th fourth a field is used to indicate the use of the i-th subchannel; wherein, 1≤i≤n, i and n are integers; The processor is specifically configured to: Determining a total number n of the subchannels according to the first field; Reading the n third fields and the n fourth fields according to the total number n of the subchannels; Determining a bandwidth size of the parallel link subchannel according to the n third fields and the n fourth fields. The user equipment according to claim 35 or claim 36, wherein the resource allocation indication information further includes: description information corresponding to each subchannel, and signaling lengths of description information corresponding to each subchannel are a preset value, where the description information corresponding to the i-th subchannel includes identifier information and a transmission parameter corresponding to the i-th subchannel; The user equipment is specifically configured to: Calculating a location of the description information corresponding to the parallel link subchannel; Reading the description information corresponding to the parallel link subchannel according to the location of the description information corresponding to the parallel link subchannel; Determining, according to the identifier information in the description information corresponding to the parallel link subchannel, whether the parallel link subchannel is allocated by the AP to the user equipment; When the parallel link subchannel is allocated for the user equipment, D2D transmission is performed on the parallel link subchannel according to a transmission parameter corresponding to the parallel link subchannel.

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