CN110475375B - Wireless access point, channel allocation method thereof and computer readable storage medium - Google Patents
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- H04W74/0833—Random access procedures, e.g. with 4-step access
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Abstract
The application discloses a channel allocation method of a wireless access point, the wireless access point and a computer readable storage medium, wherein the wireless access point is located in a communication system with a plurality of channels, and the channel allocation method comprises the following steps: the wireless access point selects one of the channels as an actual main channel and the other channels as auxiliary channels; the wireless access point constructs a virtual wireless access point, and the secondary channel is used as a virtual main channel of the virtual wireless access point; the wireless access point performs handshake communication with station equipment in a communication system to determine the idle conditions of a plurality of channels; the wireless access point allocates the actual main channel or the virtual main channel to the station equipment according to the idle condition, so that the station equipment performs data transmission with the wireless access point based on the actual main channel or performs data transmission with the virtual wireless access point based on the virtual main channel. By adopting the method, the utilization rate of the channel can be improved.
Description
Technical Field
The present application relates to the field of wireless communications, and in particular, to a channel allocation method for a wireless access point, a wireless access point and a computer readable storage medium.
Background
With the development of wireless communication technology and the wide application of portable intelligent devices, people have increasingly growing demand for wireless local area networks and increasingly greater demand for wireless channel resources.
When a plurality of users compete to use the wireless channel resources, the wireless channel resources must be scheduled based on the main channel, once the main channel is occupied, other idle channels cannot be scheduled, and thus, channel resource fragments exist, and the problem of low channel utilization rate occurs.
Disclosure of Invention
The application provides a channel allocation method of a wireless access point, the wireless access point and a computer readable storage medium, which are used for solving the problem of low channel utilization rate in the prior art.
In order to solve the above technical problem, the present application provides a channel allocation method for a wireless access point, where the wireless access point is located in a communication system having multiple channels, and the channel allocation method includes: the wireless access point selects one of the channels as an actual main channel and the other channels as auxiliary channels; the wireless access point constructs a virtual wireless access point, and the secondary channel is used as a virtual main channel of the virtual wireless access point; the wireless access point performs handshake communication with station equipment in a communication system to determine the idle conditions of a plurality of channels; the wireless access point allocates the actual main channel or the virtual main channel to the station equipment according to the idle condition, so that the station equipment performs data transmission with the wireless access point based on the actual main channel or performs data transmission with the virtual wireless access point based on the virtual main channel.
In order to solve the above technical problem, the present application provides a wireless access point, which is located in a communication system having a plurality of channels; the wireless access point comprises a coupling memory and a processor, the memory stores a computer program, and the processor realizes the method when executing the computer program.
To solve the above technical problem, the present application provides a computer-readable storage medium, on which a computer program is stored, and the computer program is executed by a processor to implement the above method.
The wireless access point is positioned in a communication system with a plurality of channels, and when the wireless access point carries out channel allocation, one wireless access point is selected as an actual main channel at first, and the other wireless access points are selected as auxiliary channels; then, a virtual wireless access point is constructed, and the constructed virtual access point takes the secondary channel as a virtual main channel; in this process, the virtual wireless access point is constructed to use the sub-channel as the virtual main channel, so that when the actual main channel is occupied, the channel resources can be configured through the virtual main channel, that is, the sub-channel can be utilized, thereby improving the utilization rate of the channel. For the allocation scheme of the application, after the virtual wireless access point is constructed, handshake communication is carried out with site equipment in a communication system to determine the idle conditions of a plurality of channels; and then allocating the actual main channel or the virtual main channel to the station equipment according to the idle condition so as to realize the communication between the station equipment and the wireless access point or the virtual wireless access point. Through the channel allocation mode, the channels can be more efficiently utilized.
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Fig. 1 is a flowchart illustrating an embodiment of a channel allocation method of a wireless access point according to the present application;
fig. 2 is a schematic diagram of a virtual wireless access point constructed in the embodiment of the channel allocation method shown in fig. 1;
fig. 3 is a channel allocation manner in an idle state of an actual main channel in the embodiment of the channel allocation method shown in fig. 1;
FIG. 4 is another channel allocation manner in the idle state of the actual main channel in the embodiment of the channel allocation method shown in FIG. 1;
FIG. 5 is a channel allocation method in the embodiment of the channel allocation method shown in FIG. 1, when an actual primary channel is in a non-idle state;
FIG. 6 is another channel allocation method when the actual primary channel is in a non-idle state in the embodiment of the channel allocation method shown in FIG. 1;
fig. 7 is a schematic diagram of data transmission between a wireless access point and a station device based on the channel allocation shown in fig. 6;
fig. 8 is a schematic structural diagram of an embodiment of a wireless access point according to the present application.
Detailed Description
According to the method and the device, the channels for data transmission between the wireless Access Points (AP) and the Station equipment (Station, STA) in the communication system are distributed, so that the utilization rate of the channels in the communication system is improved, and the wireless Access points perform a series of operations to distribute the channels to the Station equipment. Referring to fig. 1, fig. 1 is a flowchart illustrating a channel allocation method of a wireless access point according to an embodiment of the present application.
The whole process of allocating a plurality of channels in a communication system is described below from the perspective of a wireless access point, and the channel allocation method of the present embodiment includes the following steps.
S101: the wireless access point selects one of the channels as the actual primary channel and the others as secondary channels.
In this embodiment, when the wireless access point AP implements communication in the communication system, it is necessary to designate one channel as a main channel and other channels as sub-channels, so as to meet the requirement of channel scheduling based on the main channel in the communication system. The main channel is used as a data transmission channel, the auxiliary channel is used as a spare data transmission channel, and channel scheduling based on the main channel means that other channels cannot be scheduled for use after the main channel is occupied.
In this embodiment, the wireless Access Point may construct a Virtual Access Point (VAP) corresponding to a Virtual main channel, so the main channel selected by the wireless Access Point in this step is collectively referred to as an actual main channel in this application.
In addition, in this embodiment, when the wireless access point AP implements data transmission, Channel Bonding may be performed on the primary Channel and the secondary Channel (Channel Bonding), that is, when the wireless access point AP implements data transmission, the primary Channel and the secondary Channel are used simultaneously. By the method, the bandwidth of the data transmission channel can be expanded, for example, the bandwidth of the channel in this embodiment is 20MHz, when the channel is not bound, the wireless access point AP performs data transmission through the actual main channel, and the bandwidth is 20MHz at this time; after channel bonding, the wireless access point AP performs data transmission through the actual primary channel and the secondary channel, and the bandwidth may be extended to 40MHz, 80MHz, or 160MHz, or even larger.
S102: the wireless access point constructs a virtual wireless access point, and the secondary channel is used as a virtual main channel of the virtual wireless access point.
In the above step S101, it is mentioned that the scheduling is performed based on the main channel in the communication system of the present embodiment, and the wireless access point AP only designates one channel as the actual main channel, and when the actual main channel is occupied, other sub-channels cannot be used even if they are idle, so that the virtual wireless access point is constructed in step S102, and the other sub-channels are used as the virtual main channel of the virtual wireless access point, and at this time, when the sub-channels are idle, they can be used as the virtual main channel to perform channel scheduling, that is, data transmission is realized by accessing the virtual wireless access point. The embodiment improves the utilization rate of the channel by constructing the virtual wireless access point.
In this step, when the virtual wireless access point is constructed, channel bonding may also be performed, that is, the virtual main channel and its adjacent channel are bonded to be used as a data transmission channel of the virtual wireless access point. The adjacent channel in this embodiment refers to a channel adjacent to the frequency of the virtual main channel.
The above steps S101 and S102 can be understood with reference to fig. 2, and fig. 2 is a schematic diagram of constructing a virtual wireless access point in the embodiment of the channel allocation method shown in fig. 1, where the channel bandwidths are both 20 MHz.
Corresponding to step S101, the actual main channel is the main channel selected by the wireless access point AP, and the virtual main channels 1 to 7 are the sub-channels of the wireless access point AP, wherein the actual main channel can be used by binding the sub-channels, so that the bandwidth of the wireless access point AP can be the bandwidth of 8 channels, 160 MHz.
Corresponding to step S102, when the virtual main channel 1 is solely used as a data transmission channel, a virtual wireless access point VAP11 is correspondingly constructed, and the bandwidth thereof is 20 MHz; when the virtual main channel 1 and the adjacent virtual main channel 2 are bound as a data transmission channel, a virtual wireless access point VAP12 is correspondingly constructed, and the bandwidth of the virtual wireless access point VAP12 is 40 MHz; when the virtual main channel 1 and the adjacent virtual main channels 2-4 are bound as data transmission channels, a virtual wireless access point VAP13 is correspondingly constructed, and the bandwidth of the virtual wireless access point VAP13 is 80 MHz.
Similarly, for other virtual main channels, corresponding virtual wireless access points can be correspondingly constructed; specifically, for the virtual main channels 2-4, three virtual wireless access points (VAPs) can be constructed; for the virtual main channel 5-6, two virtual wireless access points can be constructed, for example, a virtual wireless access point VAP51(20MHz) and a virtual wireless access point VAP52(40MHz) are constructed corresponding to the virtual main channel 5; corresponding to the virtual main channel 7, a virtual wireless access point VAP71(20MHz) may be constructed.
The virtual wireless access points constructed in the above way all have their own BSSIDs, SSIDs, capability advertisements and default key sets, thus being able to simulate the MAC layer behavior of the wireless access points.
In addition, in fig. 2, the virtual main channel farthest from the actual main channel is defined as a virtual main channel 1, the virtual main channels 2 to 7 are sequentially defined toward the actual main channel, and the numerical order corresponds to the priority order, that is, in the subsequent step, the selection is preferentially performed from the virtual main channel 1, and how to preferentially perform the selection is specifically described in detail in the subsequent step.
And after the virtual wireless access point is constructed, the virtual wireless access point can periodically broadcast a Beacon frame on respective channels, and broadcast own BSSID and own bandwidth in the Beacon frame.
The above steps S101 and S102 may be performed when the wireless access point AP accesses the communication system, that is, when the wireless access point AP initially accesses the communication system, the virtual wireless access point is constructed; in the subsequent communication process, the station equipment STA accesses each time, and the wireless access point AP allocates channels to the station equipment STA each time, allocation can be realized based on the initially constructed virtual wireless access point, namely the construction steps of the virtual wireless access point are not repeated.
When the station equipment STA accesses, the station equipment STA is associated with the constructed virtual wireless access point at the same time, namely the station equipment STA and the virtual wireless access point mutually determine that data transmission can be realized through the same type of protocol. Specifically, the access of the station device STA to the wireless access point AP or the virtual wireless access point needs to be realized through the following steps.
S103: the wireless access point communicates with a station device in the communication system in a handshake to determine an idle condition for a plurality of channels.
In step S103, the wireless access point AP first performs handshake communication with the station device STA, so as to determine the idle condition of each channel. To be able to allocate channels to the station device STA in a subsequent step according to the idle situation.
Specifically, the present embodiment implements handshake communication using an RTS/CTS mechanism, in which the wireless access point AP first transmits the same request signal RTS to the station apparatus through each of a plurality of channels.
After receiving the request signal RTS, the station equipment STA detects whether the channel is occupied, and if the channel is occupied, the station equipment STA does not send a reply signal CTS in the occupied channel; if it is unoccupied, a CTS signal is sent back on the unoccupied channel.
The wireless access point AP receives a reply signal sent by the station device STA, and can determine whether the corresponding channel is occupied according to the reply signal, that is, the idle condition of the corresponding channel. As described above, the reply signal CTS is sent out by the station apparatus STA through the idle-state channel after receiving the request signal RTS.
S104: the wireless access point allocates the actual main channel or the virtual main channel to the station equipment according to the idle condition, so that the station equipment performs data transmission with the wireless access point based on the actual main channel or performs data transmission with the virtual wireless access point based on the virtual main channel.
After acquiring the idle condition of the channel, the wireless access point AP may allocate the actual main channel or the virtual main channel to the station device STA according to the idle condition. Specifically, if the actual primary channel is in an idle state, the actual primary channel is allocated to the station equipment STA; and if the actual main channel is in a non-idle state, allocating the virtual main channel in the idle state to the station equipment STA.
The following describes the channel allocation method in detail based on various idle situations of the channel.
First, the actual primary channel is idle.
The actual main channel is in an idle state, and other auxiliary channels are also in idle states, at this time, the wireless access point AP firstly allocates the actual main channel to the station equipment STA, and in addition, allocates a channel bound with the actual main channel to the station equipment STA according to the data transmission requirement, so as to improve the bandwidth of the data transmission channel. The wireless access point AP allocates the actual main channel to the station equipment STA, namely the wireless access point AP firstly occupies the actual main channel and reserves the actual main channel for the station equipment STA, and if the reservation is successful, the actual main channel is allocated to the station equipment STA; and if the reservation fails, the actual main channel is considered to be in a non-idle state.
Referring to fig. 3 and fig. 4 in detail, fig. 3 is a channel allocation manner in an idle state of an actual main channel in the embodiment of the channel allocation method shown in fig. 1, and fig. 4 is another channel allocation manner in an idle state of an actual main channel in the embodiment of the channel allocation method shown in fig. 1.
In fig. 3 and 4, the actual main channel and the virtual main channels 1 to 7 are both in an idle state, the wireless access point AP allocates the actual main channel to the station device STA, and selects all the virtual main channels 7-1 and the actual main channel to be bound together and allocated to the station device STA for data transmission in fig. 3, and selects a part of the virtual main channels 7-5 and the actual main channel to be bound together and allocated to the station device STA for data transmission in fig. 4, wherein the virtual main channels 7-5 are adjacent to the frequency of the actual main channel.
And II, the actual main channel is in a non-idle state.
The actual primary channel is in a non-idle state, and other secondary channels may partially or completely belong to an idle state, that is, some or all of the virtual primary channels may be in an idle state.
In this case, the wireless access point AP may preferentially allocate the virtual main channel in the idle state, which is farthest from the actual main channel, to the station device STA, and allocate the channel bound to the virtual main channel to the station device STA according to the data transmission requirement, where the channel bound to the virtual main channel should also be in the idle state. The preferential assignment here corresponds to the priority mentioned in step S102.
The wireless access point AP may also allocate the first virtual main channel and the second virtual main channel in the idle state to the station device STA, so that the station device STA performs uplink data transmission with the first virtual wireless access point based on the first virtual main channel, and performs downlink data transmission with the second virtual wireless access point based on the second virtual main channel.
Specifically, referring to fig. 5 and fig. 6, fig. 5 is a channel allocation method in the embodiment of the channel allocation method shown in fig. 1 when the actual main channel is in the non-idle state, and fig. 6 is another channel allocation method in the embodiment of the channel allocation method shown in fig. 1 when the actual main channel is in the non-idle state.
In fig. 5, the actual main channel is in a non-idle state, and only the virtual main channels 1-4 are in an idle state, so that the virtual main channel 1 farthest from the actual main channel is preferentially allocated to the station device STA, and then the virtual main channels 2-4 bound to the virtual main channel 1 are also allocated to the station device STA according to the requirement of data transmission, so that the station device STA performs data transmission with the virtual wireless access point VAP 13. In fig. 5, the virtual wireless access point VAP13 may implement Frequency Division (FD) inside, that is, the uplink and downlink data may be transmitted simultaneously at different frequencies.
In fig. 6, the actual primary channel is in a non-idle state, and only the virtual primary channel 1 and the virtual primary channel 4 are in an idle state, wherein both the virtual primary channel 1 and the virtual primary channel 4 are allocated to the station device STA, so that the station device STA performs uplink data transmission with the virtual wireless access point VAP11 and performs downlink data transmission with the virtual wireless access point VAP 41. In fig. 6, frequency division is implemented by two virtual wireless access points, that is, transmission of uplink and downlink data is performed simultaneously by different virtual wireless access points.
In the above steps, when the wireless access point AP performs channel allocation, it first needs to select a channel to be allocated, and then informs the station device STA of the selected channel.
If the station device STA is not notified, the station device STA successively blindly understands the selection signal HE-SIG-a sent by the wireless access point AP on the idle virtual main channel according to the priority order mentioned in step S102. After selecting the actual main channel or the virtual main channel according to the idle condition, the wireless access point AP sends a selection signal HE-SIG-A through the selected channel, so that the station equipment STA can know the selected channel by blindly solving the selection signal HE-SIG-A.
After the wireless access point AP and the station equipment STA determine the channel for data transmission, the wireless access point AP and the station equipment STA can perform data transmission, and the wireless access point AP informs the station equipment STA that the channel selected by the station equipment STA has multiple modes. For example:
firstly, adopting Trigger frame and SIG-B scheduling mode
For uplink data transmission, a Trigger frame is used for indicating a station device STA to use a wireless access point or which virtual wireless access point, namely which channel is used for transmission;
for downlink data transmission, the station device STA is instructed by SIG-B scheduling which wireless access point or which virtual wireless access point, i.e. which channel, to use for transmission.
Secondly, adopting RTS/CTS mode
The wireless access point AP sends an RTS signal on the selected channel, the station equipment STA replies a CTS signal on the selected channel after receiving the RTS signal, and after the handshake operation is completed, data transmission can be started through the selected channel.
For example, as shown in fig. 7, fig. 7 is a schematic diagram of data transmission between a wireless access point and a station device based on the channel allocation scheme shown in fig. 6. Wherein the wireless access point AP has selected two virtual main channels 1 and 4, i.e. two virtual wireless access points VAP11 and VAP 41. The wireless access point AP sends an RTS1 signal on virtual primary channel 1 including the BSSID of the virtual wireless access point VAP11 and including special bits to identify the channel for uplink data transmission; and the AP sends an RTS2 signal on the virtual main channel 4, wherein the BSSID of the virtual wireless access point VAP41 is included, special bits are included to identify the channel for downlink data transmission, the channel for data transmission is determined by adopting an RTS/CTS mode, and then the transmission of uplink and downlink data is realized.
When the wireless access point AP and the station equipment STA carry out data transmission, the wireless access point AP and the station equipment STA can also monitor the actual main channel and the virtual main channel 1 through radio frequency, and when the fact that a certain main channel is in an idle state is monitored, the main channel can be preempted at any time to carry out data transmission.
In the channel allocation method of the embodiment, the wireless access point improves the channel utilization rate by constructing the virtual wireless access point, and particularly improves the channel utilization rate under the condition of multi-site equipment under the condition of dense users; for a communication network, the access of multi-site equipment is realized, and the throughput rate of the network is improved. And in the embodiment, the bandwidth of the data transmission channel is also expanded in a channel binding mode.
For the device capable of implementing the method, a wireless access point is further provided in the present application, and specifically refer to fig. 8, where fig. 8 is a schematic structural diagram of an embodiment of the wireless access point in the present application.
The wireless access point 100 of this embodiment includes a memory 11 and a processor 12, where the memory 11 stores a computer program, and the processor 12 implements the channel allocation method when executing the computer program, and details of the process are not repeated.
The present application also provides a computer-readable storage medium, in which a computer program is stored which, when being executed by a processor, carries out the steps of the above-mentioned method. The computer readable storage medium may be a usb disk, an optical disk, a server, etc.
The above description is only for the purpose of illustrating embodiments of the present application and is not intended to limit the scope of the present application, and all modifications of equivalent structures and equivalent processes, which are made by the contents of the specification and the drawings of the present application or are directly or indirectly applied to other related technical fields, are also included in the scope of the present application.
Claims (10)
1. A channel allocation method of a wireless access point, wherein the wireless access point is located in a communication system having a plurality of channels; the method comprises the following steps:
the wireless access point selects one of the plurality of channels as an actual main channel, and the other channels are used as auxiliary channels;
the wireless access point constructs a virtual wireless access point, and the secondary channel is used as a virtual main channel of the virtual wireless access point;
the wireless access point performs handshake communication with station equipment in the communication system to determine the idle conditions of the multiple channels;
and the wireless access point allocates the actual main channel or the virtual main channel to the station equipment according to the idle condition, so that the station equipment performs data transmission with the wireless access point based on the actual main channel or performs data transmission with the virtual wireless access point based on the virtual main channel.
2. The method of claim 1, wherein the wireless access point constructs a virtual wireless access point, comprising:
the wireless access point constructs a virtual wireless access point, and the secondary channel is used as a virtual main channel of the virtual wireless access point; and binding the virtual main channel and the adjacent channel thereof to be used as a data transmission channel of the virtual wireless access point.
3. The method of claim 1, wherein the wireless access point performs handshake communication with a station device in the communication system, and comprises:
the wireless access point transmitting a request signal to the station device through each of the plurality of channels;
the wireless access point receives a reply signal sent by the station equipment, and the reply signal is sent by the station equipment through an idle-state channel after receiving the request signal;
and the wireless access point determines the idle conditions of the plurality of channels according to the reply signal.
4. The method of claim 1, wherein the wireless access point allocating the real main channel or the virtual main channel to the station device according to the idle condition comprises:
if the actual main channel is in an idle state, the wireless access point allocates the actual main channel to the site equipment;
and if the actual main channel is in a non-idle state, the wireless access point allocates the virtual main channel in the idle state to the site equipment.
5. The method of claim 4, wherein the wireless access point allocating the actual primary channel to the station device comprises:
the wireless access point distributes the actual main channel and the channel bound with the actual main channel to the station equipment; enabling the station equipment to carry out data transmission with the wireless access point through the actual main channel and the channel bound with the actual main channel;
the wireless access point allocates the virtual main channel in the idle state to the station equipment, and the method comprises the following steps:
the wireless access point distributes the virtual main channel in an idle state and the channel bound with the virtual main channel to the station equipment; and enabling the station equipment to carry out data transmission with the virtual wireless access point through the virtual main channel and the channel bound with the virtual main channel.
6. The method of claim 4, wherein the wireless access point allocates a virtual primary channel in an idle state to the station device, comprising:
and the wireless access point preferentially allocates the virtual main channel which is farthest from the actual main channel and is in the idle state to the station equipment.
7. The method of claim 4, wherein the wireless access point allocates a virtual primary channel in an idle state to the station device, comprising:
the wireless access point allocates the first virtual main channel and the second virtual main channel which are in the idle state to the station equipment, so that the station equipment performs uplink data transmission with the first virtual wireless access point based on the first virtual main channel and performs downlink data transmission with the second virtual wireless access point based on the second virtual main channel.
8. The method of claim 1, wherein the wireless access point allocating the real main channel or the virtual main channel to the station device according to the idle condition comprises:
the wireless access point selects the actual main channel or the virtual main channel according to the idle condition and informs the station equipment of the selected channel;
alternatively, the first and second electrodes may be,
and the wireless access point selects the actual main channel or the virtual main channel according to the idle condition and sends out a selection signal through the selected channel, so that the station equipment acquires the selected channel by blindly solving the selection signal.
9. A wireless access point, wherein the wireless access point is located in a communication system having a plurality of channels; the wireless access point comprises a coupling memory storing a computer program and a processor implementing the method of any of claims 1-8 when the processor executes the computer program.
10. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out the method of any one of claims 1-8.
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