CN117395717A

CN117395717A - Transmission bandwidth allocation method and device, storage medium and electronic device

Info

Publication number: CN117395717A
Application number: CN202210755945.9A
Authority: CN
Inventors: 唐珂; 李炎
Original assignee: ZTE Corp
Current assignee: ZTE Corp
Priority date: 2022-06-29
Filing date: 2022-06-29
Publication date: 2024-01-12
Also published as: WO2024001156A1

Abstract

The embodiment of the application provides a transmission bandwidth allocation method, a device, a storage medium and an electronic device, wherein the method comprises the following steps: acquiring resource demand information of a plurality of Access Points (APs) in a distributed orthogonal frequency division multiple access (D-OFDMA) group; dividing a transmission bandwidth into a plurality of sub-bands according to the resource demand information, wherein a plurality of APs are in one-to-one correspondence with the sub-bands; the plurality of sub-bands are notified to the plurality of APs so that the plurality of APs perform OFDMA transmission on the corresponding sub-bands, which can solve the problem of larger transmission delay caused by serial transmission in the scene of managing the plurality of APs in the home environment in the related art, reduce interference among the APs, and reduce transmission delay by parallel transmission among the plurality of APs.

Description

Transmission bandwidth allocation method and device, storage medium and electronic device

Technical Field

The embodiment of the application relates to the field of communication, in particular to a transmission bandwidth allocation method, a transmission bandwidth allocation device, a storage medium and an electronic device.

Background

On the 5G band, there is only one non-overlapping band of 160Mhz, and there are only three non-overlapping bands of 80 Mhz; therefore, if more than one AP working at 160Mhz bandwidth exists on the 5G frequency band in the home scene, the bandwidth overlapping will occur; or there are more than three APs operating at 80Mhz bandwidth that will have bandwidth overlap; if the coverage areas of the APs overlap, mutual interference may affect the communication quality of the terminal. The multi-user transmission needs to compete to acquire transmission opportunities to realize serial access of channel access and transmit, and the transmission delay is larger.

Aiming at the problem that the serial transmission causes larger transmission delay in the scene of managing multiple APs in a home environment in the related art, no solution is proposed yet.

Disclosure of Invention

The embodiment of the application provides a transmission bandwidth allocation method, a transmission bandwidth allocation device, a storage medium and an electronic device, which are used for at least solving the problem that serial transmission leads to larger transmission delay in the scene of managing multiple APs in a home environment in the related art.

According to an embodiment of the present application, there is provided a transmission bandwidth allocation method, including:

acquiring resource requirement information of a plurality of Access Points (APs) in a Distributed orthogonal frequency division multiple Access (D-Orthogonal Frequency Division Multiple Access) group;

dividing a transmission bandwidth into a plurality of sub-bands according to the resource demand information, wherein one AP corresponds to one sub-band;

the plurality of sub-bands are communicated to the plurality of APs to cause the plurality of APs to perform orthogonal frequency division multiple access (Orthogonal Frequency Division Multiple access, abbreviated OFDMA) transmissions on the corresponding sub-bands.

According to another embodiment of the present application, there is also provided a transmission bandwidth allocation method, including:

Transmitting resource demand information to a controller;

receiving a notification message sent by the controller for notifying the allocated sub-channels, wherein the notification message is sent by the controller after dividing a transmission bandwidth corresponding to the located orthogonal frequency division multiple access (D-OFDMA) group into a plurality of sub-bands according to the resource demand information, and each AP in the D-OFDMA group corresponds to one sub-band;

OFDMA transmission is performed on the allocated subbands.

According to another embodiment of the present application, there is also provided a transmission bandwidth allocation apparatus, including:

the acquisition module is used for acquiring resource requirement information of a plurality of Access Points (APs) in the distributed orthogonal frequency division multiple access (D-OFDMA) group;

the dividing module is used for dividing the transmission bandwidth into a plurality of sub-bands according to the resource demand information, wherein one AP corresponds to one sub-band;

and the notification module is used for notifying the plurality of sub-bands to the plurality of APs so that the plurality of APs perform OFDMA transmission on the corresponding sub-bands.

the sending demand module is used for sending resource demand information to the controller;

A receiving notification module, configured to receive a notification message sent by the controller to notify an allocated sub-channel, where the notification message is sent by the controller after dividing a transmission bandwidth corresponding to a located orthogonal frequency division multiple access D-OFDMA group into a plurality of sub-bands according to the resource requirement information, where each AP in the D-OFDMA group corresponds to one sub-band;

and the transmission module is used for carrying out OFDMA transmission on the allocated sub-frequency bands.

According to a further embodiment of the present application, there is also provided a computer readable storage medium having stored therein a computer program, wherein the computer program is arranged to perform the steps of any of the method embodiments described above when run.

According to a further embodiment of the present application, there is also provided an electronic device comprising a memory having stored therein a computer program and a processor arranged to run the computer program to perform the steps of any of the method embodiments described above.

In the embodiment of the application, resource requirement information of a plurality of Access Points (APs) in a distributed orthogonal frequency division multiple access (D-OFDMA) group is acquired; dividing a transmission bandwidth into a plurality of sub-bands according to the resource demand information, wherein one AP corresponds to one sub-band; the plurality of sub-bands are notified to the plurality of APs so that the plurality of APs perform OFDMA transmission on the corresponding sub-bands, which can solve the problem of larger transmission delay caused by serial transmission in the scene of managing the plurality of APs in the home environment in the related art, reduce interference among the APs, and reduce transmission delay by parallel transmission among the plurality of APs.

Drawings

Fig. 1 is a block diagram of a hardware structure of a mobile terminal of a transmission bandwidth allocation method according to an embodiment of the present application;

fig. 2 is a flowchart one of a transmission bandwidth allocation method according to an embodiment of the present application;

fig. 3 is a second flowchart of a transmission bandwidth allocation method according to an embodiment of the present application;

fig. 4 is a flowchart of transmission bandwidth allocation according to the present embodiment;

fig. 5 is a schematic diagram of a D-OFDMA procedure according to the present invention;

fig. 6 is a schematic diagram of the format one of D-OFDMA Info request according to the present embodiment;

FIG. 7 is a diagram of format two of D-OFDMA Info request according to the present embodiment;

fig. 8 is a format diagram three of D-OFDMA Info request according to the present embodiment;

fig. 9 is a diagram of a format of D-OFDMA Info request according to the present embodiment;

fig. 10 is a schematic diagram of a D-OFDMA TXOP Trigger frame structure according to the present embodiment;

fig. 11 is a schematic diagram of a D-OFDMA Resource Allocation frame structure according to the present embodiment;

FIG. 12 is a schematic diagram of explicit reporting according to the present embodiment;

FIG. 13 is a schematic diagram of explicit reporting according to the present embodiment;

fig. 14 is a diagram one of D-OFDMA Info report according to the present embodiment;

fig. 15 is a diagram two of D-OFDMA Info report according to the present embodiment;

Fig. 16 is a schematic diagram of UL D-OFDMA control according to the present embodiment;

fig. 17 is a schematic diagram of DL/UL D-OFDMA control according to the present embodiment;

fig. 18 is a schematic diagram one of Resource Allocation allocation according to the present embodiment;

fig. 19 is a schematic diagram two of Resource Allocation allocation according to the present embodiment;

fig. 20 is a schematic diagram of D-OFDMA transmission according to the present embodiment;

fig. 21 is a schematic diagram of air interface transmission synchronization according to the present embodiment;

fig. 22 is a block diagram one of a transmission bandwidth allocation apparatus according to an embodiment of the present application;

fig. 23 is a block diagram two of a transmission bandwidth allocation apparatus according to an embodiment of the present application.

Detailed Description

Embodiments of the present application will be described in detail below with reference to the accompanying drawings in conjunction with the embodiments.

It should be noted that the terms "first," "second," and the like in the description and claims of the present application and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order.

The method embodiments provided in the embodiments of the present application may be performed in a mobile terminal, a computer terminal or similar computing device. Taking the mobile terminal as an example, fig. 1 is a block diagram of a hardware structure of the mobile terminal according to the transmission bandwidth allocation method of the embodiment of the present application, as shown in fig. 1, the mobile terminal may include one or more (only one is shown in fig. 1) processors 102 (the processors 102 may include, but are not limited to, a microprocessor MCU or a processing device such as a programmable logic device FPGA) and a memory 104 for storing data, where the mobile terminal may further include a transmission device 106 for a communication function and an input/output device 108. It will be appreciated by those skilled in the art that the structure shown in fig. 1 is merely illustrative and not limiting of the structure of the mobile terminal described above. For example, the mobile terminal may also include more or fewer components than shown in fig. 1, or have a different configuration than shown in fig. 1.

The memory 104 may be used to store a computer program, for example, a software program of application software and a module, such as a computer program corresponding to a transmission bandwidth allocation method in the embodiment of the present application, and the processor 102 executes the computer program stored in the memory 104, thereby performing various functional applications and a service chain address pool slicing process, that is, implementing the method described above. Memory 104 may include high-speed random access memory, and may also include non-volatile memory, such as one or more magnetic storage devices, flash memory, or other non-volatile solid-state memory. In some examples, the memory 104 may further include memory remotely located relative to the processor 102, which may be connected to the mobile terminal via a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.

The transmission means 106 is arranged to receive or transmit data via a network. Specific examples of the network described above may include a wireless network provided by a communication provider of the mobile terminal. In one example, the transmission device 106 includes a network adapter (Network Interface Controller, simply referred to as NIC) that can connect to other network devices through a base station to communicate with the internet. In one example, the transmission device 106 may be a Radio Frequency (RF) module, which is used to communicate with the internet wirelessly.

In this embodiment, a transmission bandwidth allocation method operating on the mobile terminal or the network architecture is provided, fig. 2 is a flowchart of a transmission bandwidth allocation method according to an embodiment of the present application, and as shown in fig. 2, the flowchart includes the following steps:

step S202, obtaining resource demand information of a plurality of Access Points (APs) in a distributed D-OFDMA group;

step S204, dividing the transmission bandwidth into a plurality of sub-bands according to the resource demand information, wherein a plurality of APs are in one-to-one correspondence with the plurality of sub-bands;

step S206, notifying the plurality of sub-bands to the plurality of APs, so that the plurality of APs perform OFDMA transmission on the corresponding sub-bands.

Through the steps S202 to S206, the problem of large transmission delay caused by serial transmission in the home environment management multi-AP scene in the related art can be solved, the interference between APs is reduced, the multi-AP parallel transmission is performed, and the transmission delay is reduced.

In an embodiment, before the step S204, the method further includes: the resource requirement information includes: under the conditions of the time stamp, the TXOP duration and the bandwidth information, receiving a channel contention access success message sent by a first target AP which successfully acquires a transmission opportunity TXOP in the D-OFDMA group, wherein the channel contention access success message at least carries the following information: time stamp, TXOP duration, bandwidth information.

In this embodiment, the step S206 may specifically include: notifying the sub-bands allocated by the APs through a D-OFDMA resource allocation message, wherein the D-OFDMA resource allocation message carries at least the following information: and the time stamp, the allocated sub-band information and the TXOP duration are adopted to enable the plurality of APs to perform OFDMA-based uplink and downlink transmission in the TXOP duration according to the allocated sub-bands and the time stamp.

Further, before receiving the channel contention access success message sent by the first target AP that successfully acquires the transmission opportunity TXOP in the D-OFDMA group, the method further includes: transmitting a D-OFDMA information request to the plurality of APs, wherein the D-OFDMA information request is for requesting the plurality of APs to feedback D-OFDMA information; receiving D-OFDMA information responses returned by the plurality of APs according to the D-OFDMA information requests, wherein the D-OFDMA information responses carry the D-OFDMA Info information; or receiving the D-OFDMA information response reported by the plurality of APs according to the reporting period of the D-OFDMA information indicated in the D-OFDMA information request received for the first time.

In this embodiment, the D-OFDMA information request includes at least one of the following: a field for requesting cache information, a field for requesting priority information, a field for requesting low latency information, the D-OFDMA information response including at least one of: a field of cache information, a field of priority information, a field of low latency information, wherein the D-OFDMA information includes at least one of: cache information, priority information, low latency information; or the D-OFDMA information request includes at least a field for requesting a preferred resource allocation, and the D-OFDMA information response includes at least a field for a preferred resource allocation, wherein the D-OFDMA information includes a preferred resource allocation.

The D-OFDMA information request includes at least the following three fields: a field for requesting resource allocation of a first priority preference, a field for requesting resource allocation of a second priority preference, a field for requesting resource allocation of a third priority preference, wherein the first priority is greater than the second priority, and the second priority is greater than the third priority; the D-OFDMA information response described above includes at least the following three fields: a field for resource allocation of a first priority preference, a field for resource allocation of a second priority preference, and a field for resource allocation of a third priority preference.

In an embodiment, before the step S202, the method further includes: receiving a joining request message which is sent by the plurality of APs and joins the D-OFDMA group, wherein the joining request message carries operation category, channel information and bandwidth information; determining whether to accept to join the D-OFDMA group according to the operation class, the channel information, and the bandwidth information; and returning a joining response message to the plurality of APs, wherein the joining response message carries indication information of accepting or refusing to join the D-OFDMA group.

In an alternative embodiment, before receiving the join request message sent by the plurality of APs to join the D-OFDMA group, the method further includes: receiving discovery request messages sent by the plurality of APs, wherein the discovery request messages carry capability support information and role information of the D-OFDMA of the plurality of APs; capability support information and role information of D-OFDMA of the plurality of APs are identified and maintained; and replying or actively sending a discovery response message to the plurality of APs, wherein the discovery response message carries the capability supporting information and the role information of the self D-OFDMA.

In another alternative embodiment, after returning the join response message to the plurality of APs, the method further comprises: receiving change notification messages sent by the plurality of APs, wherein the change notification messages carry changed operation types, channel information and bandwidth information; and updating the operation categories, the channel information and the bandwidth information of the plurality of APs.

In yet another alternative embodiment, after returning the join response message to the plurality of APs, the method further comprises: receiving an exit message sent by a second target AP in the plurality of APs, and controlling the second target AP to exit the D-OFDMA group according to the exit message; or sending an exit message to the second target AP, where the exit message is used to instruct the second target AP to exit the D-OFDMA group.

The D-OFDMA Controller end is a Controller end and is used for supporting receiving unicast or broadcast discovery request messages sent by the AP and identifying capability supporting information and role information (D-OFDMA agent) of the D-OFDMA of the sending end; capability support information and role information (D-OFDMA controllers) to announce its own D-OFDMA is supported for discovery request message replies or proactive transmissions discovery response. Supporting to receive join request message sent by AP, collecting and maintaining information of operation category, channel, bandwidth and the like carried by the join request message; support for accepting or rejecting the AP to join the D-OFDMA group for join request reply join response messages. And supporting to receive the notification message sent by the AP, and updating and maintaining information such as operation types, channels, bandwidths and the like carried by the notification message. Supporting receiving a far down message sent by the AP to enable the AP to exit the D-OFDMA group; support actively sending a tear down message causes the AP to exit the D-OFDMA group.

According to another aspect of the present embodiment, there is further provided a transmission bandwidth allocation method, and fig. 3 is a flowchart of a transmission bandwidth allocation method according to an embodiment of the present application, as shown in fig. 3, where the flowchart includes the following steps:

step S302, sending resource demand information to a controller;

Step S304, receiving a notification message sent by a controller for notifying allocated sub-channels, wherein the notification message is sent by the controller after dividing a transmission bandwidth corresponding to a located orthogonal frequency division multiple access (D-OFDMA) group into a plurality of sub-bands according to the resource demand information, and a plurality of APs in the D-OFDMA group are in one-to-one correspondence with the plurality of sub-bands;

step S306, OFDMA transmission is performed on the allocated sub-bands.

Through the steps S302 to S306, the problem of large transmission delay caused by serial transmission in the home environment management multi-AP scene in the related art can be solved, the interference among APs is reduced, the multi-AP parallel transmission is performed, and the transmission delay is reduced.

In an embodiment, before the step 304, the method further includes:

the resource requirement information includes: under the conditions of the time stamp, the TXOP duration and the bandwidth information, if the channel contention access successfully acquires the transmission opportunity TXOP, sending a channel contention access success message to the controller, wherein the channel contention access success message at least carries the following information: time stamp, TXOP duration, bandwidth information.

In this embodiment, the step S306 may specifically include: in the case that the notification message is a D-OFDMA resource allocation message, the D-OFDMA resource allocation message carries at least the following information: time stamp, allocated subband information, TXOP duration; and carrying out uplink and downlink transmission based on the OFDMA in the TXOP duration according to the time stamp according to the allocated sub-band.

In an embodiment, before sending a channel contention access success message to the controller, the method further comprises: receiving a D-OFDMA information request sent by the controller, wherein the D-OFDMA information request is used for requesting the plurality of APs to feed back the D-OFDMA information; returning a D-OFDMA information response to the controller according to the D-OFDMA information request, wherein the D-OFDMA information response carries the D-OFDMA Info information; or reporting the D-OFDMA information response to the controller according to the reporting period of the D-OFDMA information indicated in the D-OFDMA information request received for the first time.

In this embodiment, the D-OFDMA information request includes at least one of: a field for requesting cache information, a field for requesting priority information, a field for requesting low latency information, the D-OFDMA information response including at least one of: a field of cache information, a field of priority information, a field of low latency information, wherein the D-OFDMA information includes at least one of: cache information, priority information, low latency information; or the D-OFDMA information request includes at least a field for requesting a preferred resource allocation, and the D-OFDMA information response includes at least a field for a preferred resource allocation, wherein the D-OFDMA information includes a preferred resource allocation.

In another embodiment, before the step S302, the method further includes: sending a joining request message for joining the D-OFDMA group to the controller, wherein the joining request message carries operation category, channel information and bandwidth information; and receiving a joining response message returned by the controller after determining whether to accept joining the D-OFDMA group according to the operation category, the channel information and the bandwidth information, wherein the joining response message carries indication information for accepting or refusing joining the D-OFDMA group.

In an embodiment, before sending a join request message to the controller to join the D-OFDMA group, the method further comprises: sending a discovery request message to the controller, wherein the discovery request message carries capability support information and role information of the D-OFDMA; and receiving a discovery response message replied or actively sent by the controller, wherein the discovery response message carries the capability supporting information and the role information of the D-OFDMA of the controller.

In another embodiment, after receiving a join response message returned by the controller after determining whether to accept joining the D-OFDMA group according to the operation category, the channel information, and the bandwidth information, the method further includes:

and sending a change notification message to the controller so that the controller updates the corresponding operation type, channel information and bandwidth information, wherein the change notification message carries the changed operation type, channel information and bandwidth information.

In yet another embodiment, after receiving a join response message returned by the controller after determining whether to accept joining the D-OFDMA group according to the operation category, the channel information, and the bandwidth information, the method further includes: sending an exit message to the controller, and exiting the D-OFDMA group under the control of the controller; or receiving an exit message sent by the controller, and exiting the D-OFDMA group according to the exit message.

The AP side supports transmitting unicast or broadcast discovery request messages announcing capability support information and role information (D-OFDMA agent) of its own D-OFDMA and finding D-OFDMA controllers, supports receiving discovery response messages and identifies the capability support information and role information of the D-OFDMA of the transmitting side. Supporting to send join request message and carrying operation category, channel, bandwidth and other information; support to receive join response messages and identify whether a request to join a D-OFDMA group is accepted. The information of the updated operation category, channel, bandwidth, etc. is notified to the D-OFDMA Controller by supporting the active transmission of the notification message. Supporting to receive a far down message sent by the D-OFDMA Controller to enable the AP to exit the D-OFDMA group; support actively sending a tear down message causes the AP to exit the D-OFDMA group.

In the case of the home environment FTTR managing multiple APs, the embodiment provides a D-OFDMA (Distributed OFDMA) technology: multiple APs are managed through the home ONU terminal equipment, and the multiple APs occupy different sub-bands under the overlapped frequency bands and the STAs in the respective BSSs to perform OFDMA transmission, so that the interference among the APs is reduced; the original serial transmission among multiple APs is changed into parallel transmission, and the transmission delay is reduced. Fig. 4 is a flowchart of transmission bandwidth allocation according to the present embodiment, and as shown in fig. 4, includes:

DHCP phase: the AP equipment initiates registration to a DHCP server through the MAC of the AP equipment, and acquires an IP address for subsequent communication;

discovery phase: the AP and the D-OFDMA Controller mark own Controller and agent role information and the supporting capability of the D-OFDMA in the message, find the other side through the mechanism and prepare for the establishment of the subsequent group;

join stage: the AP transmits the self operation type, the channel, the bandwidth and the like to the D-OFDMA Controller, and the D-OFDMA Controller decides whether to add the AP into the D-OFDMA group;

and a Notification stage: when the information such as the operation type, the channel, the bandwidth and the like of the AP change, sending a notification to inform the D-OFDMA Controller;

D-OFDMA procedure phase: D-OFDMA procedures described in detail below;

tear Down phase: both the AP and the D-OFDMA Controller may actively initiate exiting the AP from the D-OFDMA group.

Fig. 5 is a schematic diagram of the D-OFDMA procedure according to the present invention, and as shown in fig. 5, the OFDMA Info Collection phase includes:

the D-OFDMA Controller actively transmits a broadcast or unicast D-OFDMA Info request requesting each AP in the D-OFDMA group to feedback D-OFDMA Info related information including, but not limited to: uplink buffer information, priority information, low latency information, neighbor information, etc.

Each AP reports relevant information to the D-OFDMA Controller in response to the received D-OFDMA Info request response D-OFDMA Info response message, including but not limited to: uplink buffer information, priority information, low latency information, neighbor information, etc.

Reporting of D-OFDMA Info information can be subdivided into two ways:

explicit reporting, and triggering each AP to respond to D-OFDMA Info response by sending D-OFDMA Info request through the D-OFDMA Controller;

implicit reporting by the immediate, the D-OFDMA Controller indicates a subsequent D-OFDMA Info reporting period in the first D-OFDMA Info request, and each subsequent AP periodically and actively transmits the D-OFDMA Info response to complete information reporting.

D-OFDMA Schedule phase:

1. the AP (such as AP 1) which successfully acquires the TXOP actively transmits D-OFDMA TXOP Trigger to the D-OFDMA Controller and informs the D-OFDMA Controller that the channel contention access is successful; carrying information includes, but is not limited to: time stamp, TXOP duration and bandwidth information;

2. the D-OFDMA Controller divides the original operating bandwidth into a plurality of sub-bands according to the judgment by Resource Allocation, with a minimum division bandwidth of 20Mhz or less (this embodiment takes 20Mhz as an example); informing each AP of the allocated sub-band through a D-OFDMA Resource Allocation message, wherein the sub-band is used for the frequency band of OFDMA transmission of the subsequent AP; wherein the information carried in the message includes, but is not limited to: time stamp, allocated subband information, TXOP duration, etc.

Stage D-OFDMA Transmission:

1. each AP performs uplink and downlink transmission based on the OFDMA in the TXOP duration according to the sub-band allocated by the D-OFDMA Controller;

2. and when the TXOP duration is over, each AP recovers to the original working bandwidth to perform channel access competition.

Resource Allocation judgment criteria:

resource Allocation the D-OFDMA Controller allocates transmission bandwidths to the plurality of APs, and performs division of transmission bandwidths in units of 20MHz (or less than 20 MHz) among the existing transmission bandwidths for the plurality of APs according to one or more of the related information including downlink and uplink:

and (3) in the downlink direction: including but not limited to: downlink buffer information, priority information, low-delay information, bandwidth information and the like which can be maintained by the D-OFDMA Controller;

uplink direction: including but not limited to: uplink buffer information, priority information, low-delay information, neighbor information and the like reported by each AP.

The D-OFDMA Info request and response frame structure tables include:

scheme 1: fig. 6 is a schematic diagram of a format of D-OFDMA Info request according to the present embodiment, and as shown in fig. 6, the D-OFDMA info collects specific uplink parameters of the AP, including but not limited to: uplink cache information, priority information and low-delay information, wherein Buffer Status Presence, priority Information Presence and Traffic Sensitive Information Presence represent that the request receiving end reports related information when the information is set to 1; when 0 is set, the receiving end is not required to report the information.

Fig. 7 is a second format diagram of D-OFDMA Info request according to the present embodiment, and as shown in fig. 7, the presence control field in D-OFDMA Info response is consistent with the presence control field in the corresponding D-OFDMA Info request field; when Buffer Status Presence is set to 1, the Buffer Status field appears, which contains the Status of the uplink Buffer information;

when Priority Information Presence sets to 1, priority Information field appears, which contains upstream priority information; when 0 is set, the Priority Information field does not exist; when Traffic Sensitive Information Presence is set to 1, traffic Sensitive Information field appears, which contains low latency information requirements; when set to 0, the Traffic Sensitive Information field does not exist.

Scheme 2: the D-OFDMA Info only reports the resource allocation of AP preference, such as the preference of sub-bands. Fig. 8 is a diagram of format three of D-OFDMA Inforequest according to the present embodiment, which shows that when Resoucre Allocation Preference 1Presence, resoucre Allocation Preference 2Presence, and Resoucre Allocation Preference 3Presence are set to 1 as shown in fig. 8, requesting an AP to report the resource allocation of priority preference; when set to 0, this indicates that the AP is not requested to report the preferred resource allocation for this priority.

FIG. 9 is a schematic diagram of format four of D-OFDMA Info request according to the present embodiment, as shown in FIG. 9, the Resource Allocation Presence List Control field of D-OFDMA Info response is consistent with Resource Allocation Presence List Control of the corresponding D-OFDMA Info request field;

wherein, when Resoucre Allocation Preference 1Presence is set to 1, the corresponding Bandwidth Information field appears, containing the preferred resource allocation of highest priority; when set to 0, the corresponding Bandwidth Information field does not exist.

When Resoucre Allocation Preference 2Presence is set to 1, the corresponding Bandwidth Information field appears, containing the next highest priority preferred resource allocation; when set to 0, the corresponding Bandwidth Information field does not exist.

When Resoucre Allocation Preference 3Presence is set to 1, the corresponding Bandwidth Information field appears, with low priority preference resource allocation; when set to 0, the corresponding Bandwidth Information field does not exist.

Fig. 10 is a schematic diagram of a D-OFDMA TXOP Trigger frame structure according to the present embodiment, as shown in fig. 10, a D-OFDMA TXOP Trigger frame structure,

time Stamp represents a Time point when channel access contention successfully acquires a TXOP, TXOP Duration represents a length of the acquired TXOP, and Bandwidth Information represents bandwidth information (including but not limited to frequency band information, frequency bandwidth, etc.) of the acquired TXOP

Fig. 11 is a schematic diagram of a D-OFDMA Resource Allocation frame structure according to the present embodiment, and as shown in fig. 11, a D-OFDMA Resource Allocation frame structure: the Time Stamp represents a Time point when channel access contention successfully acquires a TXOP, and the TXOP Duration represents the acquired TXOP Duration; wherein, 1 or more Resource Allocation of AP fields are included, and each field includes an AP ID and Bandwidth Information; where the AP ID is used to identify a different AP in the D-OFDMA group and Bandwidth Information represents the resource allocation for that AP.

In the embodiment, the method and the device not only reduce interaction of air interface management messages, but also improve air interface transmission efficiency based on wired D-OFDMA Info Collection link information collection; and the collection and update frequency of the link information is improved, and the real-time performance of subsequent resource allocation is ensured. The D-OFDMA Controller replaces a fixed AP as a control center, so that fairness of an air interface is guaranteed. Compared with the interaction flow in co-OFDMA, the embodiment provides corresponding frame interaction details, and proposes a D-OFDMA Info request/response frame structure, a D-OFDMA TXOP Trigger frame structure and a D-OFDMA Resource Allocation frame structure.

Fig. 12 is a schematic diagram of explicit reporting according to the present embodiment, and as shown in fig. 12, the D-OFDMA Info request message is actively transmitted by the D-OFDMA Controller each time, requesting the AP to report D-OFDMA Info related information.

Fig. 13 is a schematic diagram of explicit reporting according to the present embodiment, as shown in fig. 13, D-OFDMA Info request messages are actively sent by the D-OFDMA Controller for the first time, where a reporting period for the AP to report D-OFDMA Info related information is carried; the subsequent AP does not need a D-OFDMA Info request message to trigger the active periodic transmission of the D-OFDMA Info response to report the related information.

In this embodiment, reporting related information or reporting preference frequency bands by the D-OFDMA Info includes:

reporting related information in D-OFDMA Info: with the frame structure of scheme one, fig. 14 is a schematic diagram one of reporting D-OFDMA Info according to the present embodiment, and as shown in fig. 14, the AP reports one or more parameters of the uplink buffer status information, priority information, and low latency information according to the requirement of D-OFDMA Controller in D-OFDMA Info request; the subsequent D-OFDMA Controller can integrate the uplink and downlink information to complete resource allocation according to Resource Allocation judgment standard, and each subsequent AP performs UL/DL OFDMA transmission in TXOP

D-OFDMA Info reports AP-preferred resource allocation: with the frame structure of scheme two, fig. 15 is a schematic diagram two of reporting D-OFDMA Info according to the present embodiment, and as shown in fig. 15, an AP reports resource allocation information preferred by one or more APs according to the requirement of D-OFDMA Controller in D-OFDMA Info request; the subsequent D-OFDMA Controller allocates resources according to the related preference resources of the plurality of APs, the resource allocation is completed according to Resource Allocation judgment standards, and the subsequent APs perform UL OFDMA transmission in the TXOP.

Fig. 16 is a schematic diagram of UL D-OFDMA control according to the present embodiment, and as shown in fig. 16, D-OFDMA Controller performs UL OFDMA transmission in TXOP after resource allocation according to each AP information collected in the uplink direction according to Resource Allocation criterion.

Fig. 17 is a schematic diagram of DL/UL D-OFDMA control according to the present embodiment, and as shown in fig. 17, the D-OFDMA Controller performs UL OFDMA or DL OFDMA transmission in the TXOP after performing resource allocation according to the AP information collected in the uplink direction and the related information maintained by the D-OFDMA Controller in the downlink direction according to the Resource Allocation criterion.

In this embodiment, resource Allocation allocation includes:

fig. 18 is a schematic diagram of Resource Allocation allocation according to the present embodiment, as shown in fig. 18, including:

1. after contending for TXOP in the access competition of the AP1 channel, sending a D-OFDMA TXOP Trigger notice that the D-OFDMA Controller acquires the channel access opportunity, triggering the D-OFDMA Controller to carry out the resource allocation of the D-OFDMA and coordinating each AP in the D-OFDMA group to carry out the subsequent transmission; wherein a time stamp, TXOP time and bandwidth information (for example 80 MHz) are carried;

2. the D-OFDMA Controller processes Resource Allocation and sends a D-OFDMA Resource Allocation message to inform the AP1-4 to occupy the first to fourth 20MHz frequency bands in the 80MHz bandwidth in sequence;

3. Each AP completes UL/DL OFDMA transmission with the associated STAs in the respective BSSs on the allocated 20MHz frequency band in the TXOP time.

Fig. 19 is a schematic diagram two of allocation Resource Allocation according to the present embodiment, where as shown in fig. 19, when D-OFDMA Controller performs Resource Allocation processing, it is found that the uplink and downlink buffer information of AP1 is too much, and the latency requirement is high; the uplink and downlink of the AP2 are found to have no cache information; then at Resource Allocation, the 40MHz band is allocated to AP1 and no band is allocated to AP 2; subsequent AP1 performs UL/DL OFDMA transmission on the allocated 40MHz frequency band within the TXOP time; AP2 cannot transmit during the TXOP time.

Fig. 20 is a schematic diagram of D-OFDMA transmission according to the present embodiment, and as shown in fig. 20, the D-OFDMA transmission is triggered after AP1 contends for the TXOP; D-OFDMA transmissions are also triggered after AP2 contends for a TXOP; because the status of each AP in the D-OFDMA group is the same, D-OFDMA transmission needs to be triggered after contending for the TXOP; thus, fairness among APs is guaranteed at the whole channel access level.

Fig. 21 is a schematic diagram of air interface transmission synchronization according to the present embodiment, and as shown in fig. 21, a time point at which each AP subsequently performs D-OFDMA Transmission is specified by a corresponding time stamp in D-OFDMA Resource Allocation. And sending a Trigger frame Trigger on an air interface by the AP which successfully accesses the channel and contends for the TXOP to inform each AP of carrying out D-OFDMA Transmission transmission.

According to another aspect of the present embodiment, there is further provided a transmission bandwidth allocation apparatus, fig. 22 is a block diagram of a transmission bandwidth allocation apparatus according to an embodiment of the present application, as shown in fig. 22, including:

an obtaining module 222, configured to obtain resource requirement information of a plurality of access points APs in the distributed orthogonal frequency division multiple access D-OFDMA group;

a dividing module 224, configured to divide the transmission bandwidth into a plurality of sub-bands according to the resource requirement information, where the plurality of APs are in one-to-one correspondence with the plurality of sub-bands;

a notification module 226, configured to notify the multiple sub-bands to the multiple APs, so that the multiple APs perform OFDMA transmission on the corresponding sub-bands.

In an embodiment, the device further comprises:

a message receiving module, configured to, when the resource requirement information includes: under the conditions of the time stamp, the TXOP duration and the bandwidth information, receiving a channel contention access success message sent by a first target AP which successfully acquires a transmission opportunity TXOP in the D-OFDMA group, wherein the channel contention access success message at least carries the following information: time stamp, TXOP duration, bandwidth information.

In an embodiment, the notifying module is further configured to notify the subbands allocated by the plurality of APs through a D-OFDMA resource allocation message, where the D-OFDMA resource allocation message carries at least the following information: and the time stamp, the allocated sub-band information and the TXOP duration are adopted to enable the plurality of APs to perform OFDMA-based uplink and downlink transmission in the TXOP duration according to the allocated sub-bands and the time stamp.

In an embodiment, the device further comprises:

a first sending request module, configured to send a D-OFDMA information request to the plurality of APs, where the D-OFDMA information request is configured to request the plurality of APs to feedback D-OFDMA information;

the first receiving response module is used for receiving D-OFDMA information responses returned by the plurality of APs according to the D-OFDMA information requests, wherein the D-OFDMA information responses carry the D-OFDMA Info information; or receiving the D-OFDMA information response reported by the plurality of APs according to the reporting period of the D-OFDMA information indicated in the D-OFDMA information request received for the first time.

In an embodiment, the D-OFDMA information request includes at least one of: a field for requesting cache information, a field for requesting priority information, a field for requesting low latency information, the D-OFDMA information response including at least one of: a field of cache information, a field of priority information, a field of low latency information, wherein the D-OFDMA information includes at least one of: cache information, priority information, low latency information; or alternatively

The D-OFDMA information request includes at least a field for requesting a preferred resource allocation, and the D-OFDMA information response includes at least a field for a preferred resource allocation, wherein the D-OFDMA information includes a preferred resource allocation.

In an embodiment, the D-OFDMA information request includes at least three fields: a field for requesting resource allocation of a first priority preference, a field for requesting resource allocation of a second priority preference, a field for requesting resource allocation of a third priority preference, wherein the first priority is greater than the second priority, and the second priority is greater than the third priority;

the D-OFDMA information response includes at least the following three fields: a field for resource allocation of a first priority preference, a field for resource allocation of a second priority preference, and a field for resource allocation of a third priority preference.

In an embodiment, the device further comprises:

a first receiving request module, configured to receive a join request message sent by the multiple APs to join the D-OFDMA group, where the join request message carries an operation class, channel information, and bandwidth information;

a determining module, configured to determine whether to accept to join the D-OFDMA group according to the operation class, the channel information, and the bandwidth information;

and the first response return module is used for returning a joining response message to the plurality of APs, wherein the joining response message carries indication information for accepting or refusing to join the D-OFDMA group.

In an embodiment, the device further comprises:

a second receiving request message, configured to receive a discovery request message sent by the multiple APs, where the discovery request message carries capability support information and role information of D-OFDMA of the multiple APs;

an identification module for identifying and maintaining capability support information and role information of D-OFDMA of the plurality of APs;

and the sending response module is used for replying or actively sending discovery response messages to the plurality of APs, wherein the discovery response messages carry capability support information and role information of the self D-OFDMA.

In an embodiment, the device further comprises:

a message receiving module, configured to receive a change notification message sent by the multiple APs, where the change notification message carries a changed operation type, channel information and bandwidth information;

and the updating module is used for updating the operation categories, the channel information and the bandwidth information of the plurality of APs.

In an embodiment, the device further comprises:

the control module is used for receiving an exit message sent by a second target AP in the plurality of APs and controlling the second target AP to exit the D-OFDMA group according to the exit message; or alternatively

And the message sending module is used for sending an exit message to the second target AP, wherein the exit message is used for indicating the second target AP to exit the D-OFDMA group.

According to another aspect of the present embodiment, there is further provided a transmission bandwidth allocation apparatus, and fig. 23 is a block diagram two of the transmission bandwidth allocation apparatus according to the embodiment of the present application, as shown in fig. 23, where the apparatus includes:

a sending requirement module 232, configured to send resource requirement information to the controller;

a receiving notification module 234, configured to receive a notification message sent by the controller to notify an allocated sub-channel, where the notification message is sent by the controller after dividing a transmission bandwidth corresponding to a located orthogonal frequency division multiple access D-OFDMA group into a plurality of sub-bands according to the resource requirement information, where a plurality of APs in the D-OFDMA group are in one-to-one correspondence with the plurality of sub-bands;

a transmission module 236, configured to perform OFDMA transmission on the allocated sub-bands.

In an embodiment, the device further comprises:

In an embodiment, the transmission module is further configured to, in a case where the notification message is a D-OFDMA resource allocation message, carry at least the following information: time stamp, allocated subband information, TXOP duration; and carrying out uplink and downlink transmission based on the OFDMA in the TXOP duration according to the time stamp according to the allocated sub-band.

In an embodiment, the device further comprises:

a receiving information module, configured to receive a D-OFDMA information request sent by the controller, where the D-OFDMA information request is used to request the multiple APs to feed back D-OFDMA information;

the second response module is used for returning a D-OFDMA information response to the controller according to the D-OFDMA information request, wherein the D-OFDMA information response carries the D-OFDMA Info information; or alternatively

And the reporting module is used for reporting the D-OFDMA information response to the controller according to the reporting period of the D-OFDMA information indicated in the D-OFDMA information request received for the first time.

In an embodiment, the device further comprises:

a second sending request module, configured to send a join request message for joining the D-OFDMA group to the controller, where the join request message carries an operation class, channel information, and bandwidth information;

and the second receiving response module is used for receiving a joining response message returned by the controller after determining whether to accept joining the D-OFDMA group according to the operation category, the channel information and the bandwidth information, wherein the joining response message carries indication information for accepting or refusing joining the D-OFDMA group.

In an embodiment, the device further comprises:

a third sending request module, configured to send a discovery request message to the controller, where the discovery request message carries capability support information and role information of D-OFDMA;

and the third receiving response module is used for receiving the discovery response message replied or actively sent by the controller, wherein the discovery response message carries the capability supporting information and the role information of the D-OFDMA of the controller.

In an embodiment, the device further comprises:

and the sending change module is used for sending a change notification message to the controller so as to enable the controller to update the corresponding operation type, channel information and bandwidth information, wherein the change notification message carries the changed operation type, channel information and bandwidth information.

In an embodiment, the device further comprises:

an exit module, configured to send an exit message to the controller, and exit the D-OFDMA group under control of the controller; or receiving an exit message sent by the controller, and exiting the D-OFDMA group according to the exit message.

Embodiments of the present application also provide a computer readable storage medium having a computer program stored therein, wherein the computer program is arranged to perform the steps of any of the method embodiments described above when run.

In one exemplary embodiment, the computer readable storage medium may include, but is not limited to: a usb disk, a Read-Only Memory (ROM), a random access Memory (Random Access Memory, RAM), a removable hard disk, a magnetic disk, or an optical disk, or other various media capable of storing a computer program.

Embodiments of the present application also provide an electronic device comprising a memory having a computer program stored therein and a processor arranged to run the computer program to perform the steps of any of the method embodiments described above.

In an exemplary embodiment, the electronic apparatus may further include a transmission device connected to the processor, and an input/output device connected to the processor.

Specific examples in this embodiment may refer to the examples described in the foregoing embodiments and the exemplary implementation, and this embodiment is not described herein.

It will be appreciated by those skilled in the art that the modules or steps of the application described above may be implemented in a general purpose computing device, they may be concentrated on a single computing device, or distributed across a network of computing devices, they may be implemented in program code executable by computing devices, so that they may be stored in a storage device for execution by computing devices, and in some cases, the steps shown or described may be performed in a different order than that shown or described herein, or they may be separately fabricated into individual integrated circuit modules, or multiple modules or steps of them may be fabricated into a single integrated circuit module. Thus, the present application is not limited to any specific combination of hardware and software.

The foregoing description is only of the preferred embodiments of the present application and is not intended to limit the same, but rather, various modifications and variations may be made by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the principles of the present application should be included in the protection scope of the present application.

Claims

1. A transmission bandwidth allocation method, the method comprising:

acquiring resource demand information of a plurality of Access Points (APs) in a distributed orthogonal frequency division multiple access (D-OFDMA) group;

dividing a transmission bandwidth into a plurality of sub-bands according to the resource demand information, wherein the plurality of APs are in one-to-one correspondence with the plurality of sub-bands;

the plurality of sub-bands are notified to the plurality of APs to cause the plurality of APs to perform orthogonal frequency division multiple access OFDMA transmission on the corresponding sub-bands.

2. The method of claim 1, wherein the resource requirement information comprises: the method further comprises, before dividing a transmission bandwidth into a plurality of sub-bands according to the resource requirement information, a time stamp, a transmission opportunity TXOP duration, and bandwidth information:

receiving a channel contention access success message sent by a first target AP which successfully acquires a transmission opportunity TXOP in the D-OFDMA group, wherein the channel contention access success message carries the following information: time stamp, TXOP duration, bandwidth information.

3. The method of claim 2, wherein notifying the plurality of sub-bands to the plurality of APs to cause the plurality of APs to perform OFDMA transmissions on the corresponding sub-bands comprises:

notifying the sub-bands allocated by the APs through a D-OFDMA resource allocation message, wherein the D-OFDMA resource allocation message carries at least the following information: and the time stamp, the allocated sub-band information and the TXOP duration are adopted to enable the plurality of APs to perform OFDMA-based uplink and downlink transmission in the TXOP duration according to the allocated sub-bands and the time stamp.

4. The method of claim 2, wherein prior to receiving the channel contention access success message sent by the first target AP in the D-OFDMA group that the channel contention access successfully acquired the transmission opportunity TXOP, the method further comprises:

transmitting a D-OFDMA information request to the plurality of APs, wherein the D-OFDMA information request is for requesting the plurality of APs to feedback D-OFDMA information;

receiving D-OFDMA information responses returned by the plurality of APs according to the D-OFDMA information requests, wherein the D-OFDMA information responses carry the D-OFDMA Info information; or alternatively

And receiving the D-OFDMA information responses reported by the plurality of APs according to the reporting period of the D-OFDMA information indicated in the D-OFDMA information request received for the first time.

5. The method of claim 4, wherein the step of determining the position of the first electrode is performed,

the D-OFDMA information request includes at least one of: a field for requesting cache information, a field for requesting priority information, a field for requesting low latency information, the D-OFDMA information response including at least one of: a field of cache information, a field of priority information, a field of low latency information, wherein the D-OFDMA information includes at least one of: cache information, priority information, low latency information; or alternatively

6. The method of claim 5, wherein the step of determining the position of the probe is performed,

the D-OFDMA information request includes at least the following three fields: a field for requesting resource allocation of a first priority preference, a field for requesting resource allocation of a second priority preference, a field for requesting resource allocation of a third priority preference, wherein the first priority is greater than the second priority, and the second priority is greater than the third priority;

7. The method according to claim 1, characterized in that before acquiring the resource requirement information of a plurality of access points AP within the distributed orthogonal frequency division multiple access D-OFDMA group, the method further comprises:

receiving a joining request message which is sent by the plurality of APs and joins the D-OFDMA group, wherein the joining request message carries operation category, channel information and bandwidth information;

determining whether to accept to join the D-OFDMA group according to the operation class, the channel information, and the bandwidth information;

and returning a joining response message to the plurality of APs, wherein the joining response message carries indication information of accepting or refusing to join the D-OFDMA group.

8. The method of claim 7, wherein prior to receiving the join request message sent by the plurality of APs to join the D-OFDMA group, the method further comprises:

receiving discovery request messages sent by the plurality of APs, wherein the discovery request messages carry capability support information and role information of the D-OFDMA of the plurality of APs;

Capability support information and role information of D-OFDMA of the plurality of APs are identified and maintained;

and replying or actively sending a discovery response message to the plurality of APs, wherein the discovery response message carries the capability supporting information and the role information of the self D-OFDMA.

9. The method of claim 7, wherein after returning a join response message to the plurality of APs, the method further comprises:

receiving change notification messages sent by the plurality of APs, wherein the change notification messages carry changed operation types, channel information and bandwidth information;

and updating the operation categories, the channel information and the bandwidth information of the plurality of APs.

10. The method of claim 7, wherein after returning a join response message to the plurality of APs, the method further comprises:

receiving an exit message sent by a second target AP in the plurality of APs, and controlling the second target AP to exit the D-OFDMA group according to the exit message; or alternatively

And sending an exit message to the second target AP, wherein the exit message is used for indicating the second target AP to exit the D-OFDMA group.

11. A transmission bandwidth allocation method, the method comprising:

Transmitting resource demand information to a controller;

receiving a notification message sent by the controller for notifying the allocated sub-channels, wherein the notification message is sent by the controller after dividing a transmission bandwidth corresponding to a distributed orthogonal frequency division multiple access (D-OFDMA) group into a plurality of sub-bands according to the resource demand information, and the plurality of APs in the D-OFDMA group are in one-to-one correspondence with the plurality of sub-bands;

an orthogonal frequency division multiple access, OFDMA, transmission is performed on the allocated sub-bands.

12. The method of claim 11, wherein prior to receiving the notification message sent by the controller informing of the assigned sub-channel, the method further comprises:

the resource requirement information includes: under the conditions of the time stamp, the transmission opportunity TXOP duration and the bandwidth information, if the channel contention access successfully acquires the transmission opportunity TXOP, sending a channel contention access success message to the controller, wherein the channel contention access success message at least carries the following information: time stamp, TXOP duration, bandwidth information.

13. The method of claim 12, wherein making a 0FDMA transmission on the allocated subbands comprises:

In the case that the notification message is a D-OFDMA resource allocation message, the D-OFDMA resource allocation message carries at least the following information: time stamp, allocated subband information, TXOP duration;

and carrying out uplink and downlink transmission based on the OFDMA in the TXOP duration according to the time stamp according to the allocated sub-band.

14. The method of claim 12, wherein prior to sending a channel contention access success message to the controller, the method further comprises:

receiving a D-OFDMA information request sent by the controller, wherein the D-OFDMA information request is used for requesting the plurality of APs to feed back the D-OFDMA information;

returning a D-OFDMA information response to the controller according to the D-OFDMA information request, wherein the D-OFDMA information response carries the D-OFDMA Info information; or alternatively

And reporting the D-OFDMA information response to the controller according to the reporting period of the D-OFDMA information indicated in the D-OFDMA information request received for the first time.

15. The method of claim 14, wherein the step of providing the first information comprises,

16. The method of claim 15, wherein the step of determining the position of the probe is performed,

17. The method of claim 11, wherein prior to sending the resource demand information to the controller, the method further comprises:

sending a joining request message for joining the D-OFDMA group to the controller, wherein the joining request message carries operation category, channel information and bandwidth information;

And receiving a joining response message returned by the controller after determining whether to accept joining the D-OFDMA group according to the operation category, the channel information and the bandwidth information, wherein the joining response message carries indication information for accepting or refusing joining the D-OFDMA group.

18. The method of claim 17, wherein prior to sending a join request message to the controller to join the D-OFDMA group, the method further comprises:

sending a discovery request message to the controller, wherein the discovery request message carries capability support information and role information of the D-OFDMA;

and receiving a discovery response message replied or actively sent by the controller, wherein the discovery response message carries the capability supporting information and the role information of the D-OFDMA of the controller.

19. The method of claim 17, wherein after receiving a join response message returned by the controller after determining whether to accept joining the D-OFDMA group based on the operation category, the channel information, and the bandwidth information, the method further comprises:

20. The method of claim 17, wherein after receiving a join response message returned by the controller after determining whether to accept joining the D-OFDMA group based on the operation category, the channel information, and the bandwidth information, the method further comprises:

sending an exit message to the controller, and exiting the D-OFDMA group under the control of the controller; or alternatively

And receiving an exit message sent by the controller, and exiting the D-OFDMA group according to the exit message.

21. A transmission bandwidth allocation apparatus, the apparatus comprising:

the dividing module is used for dividing the transmission bandwidth into a plurality of sub-bands according to the resource demand information, wherein the plurality of APs are in one-to-one correspondence with the sub-bands;

and the notification module is used for notifying the plurality of sub-bands to the plurality of APs so that the plurality of APs perform Orthogonal Frequency Division Multiple Access (OFDMA) transmission on the corresponding sub-bands.

22. A transmission bandwidth allocation apparatus, the apparatus comprising:

A receiving notification module, configured to receive a notification message sent by the controller to notify an allocated sub-channel, where the notification message is sent by the controller after dividing a transmission bandwidth corresponding to a distributed orthogonal frequency division multiple access D-OFDMA group where the notification message is located into a plurality of sub-bands according to the resource requirement information, where the plurality of APs in the D-OFDMA group are in one-to-one correspondence with the plurality of sub-bands;

and the transmission module is used for carrying out Orthogonal Frequency Division Multiple Access (OFDMA) transmission on the allocated sub-frequency bands.

23. A computer readable storage medium having a computer program stored therein, wherein the computer program is arranged to perform the method of any of claims 1 to 10, 11 to 20 when run.

24. An electronic device comprising a memory having stored therein a computer program and a processor arranged to run the computer program to perform the method of any of claims 1 to 10, 11 to 20.