CN109246760B - Wireless local area network load balancing method based on power control, wireless access device and wireless access equipment - Google Patents
Wireless local area network load balancing method based on power control, wireless access device and wireless access equipment Download PDFInfo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
- H04W28/02—Traffic management, e.g. flow control or congestion control
- H04W28/08—Load balancing or load distribution
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/04—TPC
- H04W52/30—TPC using constraints in the total amount of available transmission power
- H04W52/34—TPC management, i.e. sharing limited amount of power among users or channels or data types, e.g. cell loading
- H04W52/343—TPC management, i.e. sharing limited amount of power among users or channels or data types, e.g. cell loading taking into account loading or congestion level
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/04—TPC
- H04W52/30—TPC using constraints in the total amount of available transmission power
- H04W52/36—TPC using constraints in the total amount of available transmission power with a discrete range or set of values, e.g. step size, ramping or offsets
- H04W52/367—Power values between minimum and maximum limits, e.g. dynamic range
Abstract
The invention relates to a wireless local area network load balancing method based on power control, a wireless access device and wireless access equipment. The wireless local area network load balancing method based on power control comprises the following steps: acquiring the load level of a load balancing object of the current wireless access equipment, wherein the load balancing object is other wireless access equipment which receives a search request in a wireless local area network; and if the current wireless access equipment is the wireless access equipment with the lowest channel attenuation level between the current wireless access equipment and the wireless user terminal to be accessed, and if the difference value between the load level of the current wireless access equipment and the load level of the load balancing object with the lowest load level is less than a first set threshold value, providing access service for the wireless user terminal to be accessed through the current wireless access equipment. The wireless local area network load balancing method based on power control ensures the access of the wireless user terminal and improves the reliability of the wireless access equipment accessing the wireless local area network.
Description
Technical Field
The present invention relates to the field of wireless local area network communications, and in particular, to a power control based wireless local area network load balancing method, a wireless access device, and a wireless access device.
Background
With the continuous growth of information services, wireless communication systems are undergoing a fast development process, higher and higher transmission and coverage requirements require wider transmission bandwidth, but the shortage of system resources requires a better way to improve resource utilization, and a wireless local area network (hereinafter referred to as WLAN) is a system capable of improving the coverage of cellular networks and the flexibility of networking. In a WLAN environment, each access device (hereinafter referred to as AP) may form a basic service set (hereinafter referred to as BSS), which is identified by a basic service set identifier (hereinafter referred to as BSSID), a plurality of BSSs may be extended to an extended service set (hereinafter referred to as ESS) and identified by an extended service set identifier (hereinafter referred to as ESSID), and each wireless user terminal (hereinafter referred to as STA) accesses a corresponding AP to access and utilize wireless network resources. For example, in a building, a plurality of access devices (hereinafter referred to as APs) are distributed in different important locations, and a STA needs to access one or more of the access devices APs in order to acquire service. Due to the randomness of STA service arrival, the processing capabilities of APs in each access device are different, and the channel conditions between the STA and the AP are different, when the system operates for a period of time, the problem of load imbalance occurs, that is: some access devices AP have a large amount of traffic to allocate, while some are idle. The reason for the load imbalance problem is that the conventional STA access selects a service point according to the signal strength of the AP, which may cause the access device with stronger signal or better channel to be overloaded, so that the network resources allocated by each STA are not fair, the network efficiency is affected immediately, and even network congestion may be caused.
In the prior art, the above problem is mainly solved by load balancing control, when a wireless user terminal in a wireless local area network sends a query request to a wireless access device AP, the wireless access device in the wireless local area network elects the wireless access device AP with the lightest load as a target access device AP, but the method cannot ensure the reliability of access service when the channel attenuation between the target access device AP and the wireless user terminal is strong, and even a situation that no access device provides service occurs if the target access device AP is not detected by the wireless user terminal.
Disclosure of Invention
Based on this, the present invention provides a method for load balancing of a wireless local area network based on power control, which can avoid the possibility that no wireless access device provides an access service, and improve the reliability of the wireless access device accessing the wireless local area network connection.
The invention is realized by the following scheme:
a wireless local area network load balancing method based on power control comprises the following steps:
acquiring the load level of a load balancing object of the current wireless access equipment, wherein the load balancing object is other wireless access equipment which receives a search request of a wireless user terminal to be accessed in a wireless local area network;
if the current wireless access equipment is the wireless access equipment with the lowest channel attenuation level between the current wireless access equipment and the wireless user terminal to be accessed, and if the difference value between the load level of the current wireless access equipment and the load level of the load balancing object with the lowest load level is less than or equal to a first set threshold value, providing access service for the wireless user terminal to be accessed through the current wireless access equipment;
and if the difference value between the load level of the current wireless access equipment and the load level of the load balancing object with the lowest load level is greater than a first set threshold value, and if the load level of the current wireless access equipment is greater than the load level of the load balancing object with the lowest load level and the current wireless access equipment is in the minimum transmitting power state, providing access service for the wireless user terminal to be accessed through the current wireless access equipment.
The wireless local area network load balancing method based on power control selects the wireless access equipment with the best channel condition when the wireless user terminal is accessed, and simultaneously ensures that the load level of the wireless access equipment with the best channel condition is in a balanced range by comparing the load level of the wireless access equipment with the best channel condition with the load level of the wireless access equipment with the lowest load level in the wireless local area network, thereby ensuring the access of the wireless user terminal and improving the connection reliability of the wireless access equipment accessing the wireless local area network.
Further, the method also comprises the following steps:
and if the current wireless access equipment is not in the minimum transmission power state, reducing the transmission power of the current wireless access equipment.
The transmission power of the current wireless access equipment is reduced, the coverage area of the access equipment is reduced, part of loads accessed by the current wireless access equipment are released, the released loads can be accessed to other access equipment, power resources are saved, local area network resources are better utilized, and load balance in a local area network is realized.
Further, the method also comprises the following steps:
and if the load level of the current wireless access equipment is less than the load level of the load balancing object with the lowest load level and the current wireless access equipment is in the maximum transmitting power state, providing access service for the wireless user terminal to be accessed through the current wireless access equipment.
Further, the method also comprises the following steps:
and if the current wireless access equipment is not in the maximum transmitting power state, increasing the transmitting power of the current wireless access equipment, and providing access service for the wireless user terminal to be accessed by using the increased transmitting power.
The coverage area of the access equipment can be enlarged by improving the transmitting power, and network resources are utilized more fully.
Further, after reducing the transmission power of the current wireless access device, the method further includes the following steps:
and if the current wireless access equipment is the wireless access equipment with the lowest channel attenuation level between the current wireless access equipment and the wireless user terminal to be accessed, providing access service for the wireless user terminal to be accessed through the current wireless access equipment.
And if the current wireless access equipment is still the wireless access equipment with the best channel condition with the wireless user terminal to be accessed after the power of the current wireless access equipment is reduced, providing access service for the wireless user terminal to be accessed through the current wireless access equipment.
Further, after reducing the transmission power of the current wireless access device, the method further includes the following steps:
and if the first wireless access equipment in the load balancing object of the current wireless access equipment is the wireless access equipment with the lowest channel attenuation level between the first wireless access equipment and the wireless user terminal to be accessed, providing access service for the wireless user terminal to be accessed through the first wireless access equipment.
And if the current wireless access equipment reduces the transmitting power, the equipment with the best channel condition with the wireless user terminal to be accessed is other access equipment, or the wireless user terminal to be accessed exits the coverage range of the current wireless access equipment, the new wireless access equipment with the best channel condition provides access service for the wireless user terminal to be accessed.
Further, acquiring the load level of the load balancing object of the current wireless access device, includes the following steps:
and creating a load balancing object list, acquiring the load level of the load balancing object of the current wireless access equipment according to the load level of the wireless access equipment detected and broadcasted by the wireless user terminal to be accessed, and storing the load level of the load balancing object in the load balancing object list.
Further, the present invention also provides a wireless access device, including: a controller and a storage medium having stored thereon a computer program which, when executed by a processor, performs the steps of the power control based wireless local area network load balancing method as set forth in any one of the above.
Further, the present invention also provides a wireless access device, including:
the load balancing object acquisition module is used for acquiring the load level of a load balancing object of the current wireless access equipment, wherein the load balancing object is other wireless access equipment which receives a search request of a wireless user terminal to be accessed in a wireless local area network;
the operation module is used for providing access service for the wireless user terminal to be accessed through the current wireless access equipment when the current wireless access equipment is the wireless access equipment with the lowest channel attenuation level between the current wireless access equipment and the wireless user terminal to be accessed and if the difference value between the load level of the current wireless access equipment and the load level of the load balancing object with the lowest load level is less than or equal to a first set threshold value; and if the difference value between the load level of the current wireless access equipment and the load level of the load balancing object with the lowest load level is greater than a first set threshold value, and if the load level of the current wireless access equipment is greater than the load level of the load balancing object with the lowest load level and the current wireless access equipment is in the minimum transmitting power state, providing access service for the wireless user terminal to be accessed through the current wireless access equipment.
For a better understanding and practice, the invention is described in detail below with reference to the accompanying drawings.
Drawings
Fig. 1 is a flow chart of a method for load balancing of a wireless local area network based on power control according to an embodiment;
fig. 2 is a block diagram of a process for obtaining a load balancing object of a current wireless access device in an embodiment;
fig. 3 is a block diagram of a process for increasing the transmit power of a wireless access device in one embodiment;
FIG. 4 is a block diagram of a WLAN in one embodiment;
FIG. 5 is a schematic diagram of load balancing in one embodiment;
fig. 6 is a flow chart of a method for load balancing of a wireless local area network based on power control according to an embodiment;
fig. 7 is a schematic structural diagram of a wireless access device according to an embodiment;
fig. 8 is a schematic structural diagram of a wireless access device in an embodiment.
Detailed Description
Referring to fig. 1, in an embodiment, a method for load balancing in a wireless local area network based on power control of the present invention includes the following steps:
step S10: and acquiring the load level of a load balancing object of the current wireless access equipment, wherein the load balancing object is other wireless access equipment which receives a search request of a wireless user terminal to be accessed in a wireless local area network.
The wireless access equipment is a hardware equipment for remotely accessing network resources, and comprises a router, a multiplexer, a modulation regulator and the like.
The load balancing object is wireless access equipment which receives a search request except current wireless access equipment which receives the search request when the wireless user terminal to be accessed sends the search request to a plurality of wireless access equipment in the wireless local area network.
The load level of the load balancing object is an index reflecting the current load condition of other wireless access devices receiving the search request, and in this embodiment, the load level of the wireless access device may be the number of wireless user terminals currently borne by the wireless access device, or the traffic of the wireless access device, or the traffic required by different QoS (Quality of Service) is folded into a quantization size of a unified standard. In other embodiments, the load level may also be different performance parameter threshold criteria of different QoS services, such as packet loss rate, bit error rate, and the like. In this embodiment, the higher the load level is, it indicates that the more the number of wireless user terminals currently borne by the load balancing object is, or the larger the traffic of the wireless access device is, the smaller the access margin that can be provided by the load balancing object is.
The wireless user terminal is a device required by a user to realize wireless internet access, such as a mobile phone, a tablet, a notebook computer, an intelligent watch, an intelligent bracelet and the like.
In this embodiment, the current wireless access device may obtain the load level of the load balancing object in multiple ways, for example, the load information of each access device and the search request information received by each access device may be obtained by a server, and the server sends the information to each access device, so that the current wireless access device obtains the load level of the load balancing object; the load information of each access device and the search request information received by the access device can be periodically broadcasted, and the current wireless access device obtains the load level of the load balancing object by receiving the information broadcasted by other access devices in the wireless local area network.
Step S20: and if the current wireless access equipment is the wireless access equipment with the lowest channel attenuation level between the current wireless access equipment and the wireless user terminal to be accessed, and if the difference value between the load level of the current wireless access equipment and the load level of the load balancing object with the lowest load level is less than or equal to a first set threshold value, providing access service for the wireless user terminal to be accessed through the current wireless access equipment.
The channel attenuation level is the proportion of signal intensity attenuated by a channel, if the channel attenuation level between the current wireless access equipment and the wireless user terminal to be accessed is higher, the signal attenuation proportion between the current wireless access equipment and the wireless user terminal to be accessed is higher, the channel condition between the current wireless access equipment and the wireless user terminal to be accessed is worse, and the wireless access equipment with the lowest channel attenuation level between the current wireless access equipment and the wireless user terminal to be accessed is the wireless access equipment with the best channel condition between the current wireless access equipment and the wireless user terminal to be accessed.
In this embodiment, a difference between the load level of the current wireless access device and the load level of the load balancing object with the lowest load level is obtained by comparing the load level of the current wireless access device with the load level of the load balancing object with the lowest load level, where the difference is an absolute value and may be a value in which the load level of the current wireless access device is greater than the load level of the load balancing object with the lowest load level or a value in which the load level of the current wireless access device is less than the load level of the load balancing object with the lowest load level. And when the load level is the number of wireless user terminals currently borne by the wireless access equipment, or the traffic of the wireless access equipment, or the traffic with different QoS requirements is combined into a quantization size of a unified standard, the first set threshold is set corresponding to the load level type.
If the difference between the load level of the current wireless access device and the load level of the load balancing object with the lowest load level is smaller than or equal to the first set threshold, it is indicated that the load difference between the current wireless access device and the load balancing object is not large, and the current wireless access device does not need to perform load balancing, so that the current wireless access device provides access service for the wireless user terminal to be accessed.
The wireless local area network load balancing method based on power control selects the wireless access equipment with the best channel condition when the wireless user terminal is accessed, and simultaneously ensures that the load level of the wireless access equipment with the best channel condition is in a balanced range by comparing the load level of the wireless access equipment with the best channel condition with the load level of the wireless access equipment with the lowest load level in the wireless local area network, thereby ensuring the access of the wireless user terminal and improving the connection reliability of the wireless access equipment accessing the wireless local area network.
In an embodiment, referring to fig. 2, obtaining a load level of a load balancing object of a current wireless access device includes the following steps:
step S11: a list of load balancing objects is created.
Step S12: and acquiring the load information of the wireless access equipment in the wireless local area network.
Step S13: and acquiring a load balancing object of the current wireless access equipment according to the information of the wireless access equipment detected and broadcasted by the wireless user terminal to be accessed, and storing the load level of the load balancing object in the load balancing object list.
The load balancing object list is updated periodically, the wireless user terminal broadcasts the detected information of the wireless access equipment to the corresponding wireless access equipment after detecting the wireless access equipment, and the related wireless access equipment can acquire the load balancing object of the current wireless access equipment according to the broadcast information and acquire the load information of the load balancing object of the current wireless access equipment by combining the load information broadcasted by the wireless access equipment between the wireless local area networks.
In one embodiment, the method further comprises the following steps:
step S30: and if the difference value between the load level of the current wireless access equipment and the load level of the load balancing object with the lowest load level is greater than a first set threshold value, and if the load level of the current wireless access equipment is greater than the load level of the load balancing object with the lowest load level and the current wireless access equipment is in the minimum transmitting power state, providing access service for the wireless user terminal to be accessed through the current wireless access equipment.
The power of the wireless access equipment is the transmitting power of the wireless access equipment, and the larger the transmitting power of the wireless access equipment is, the larger the coverage area of the wireless access equipment is. The current wireless access equipment is in the minimum transmitting power state, that is, the current wireless access equipment is already in the minimum coverage area, so even if the load of the current wireless access equipment is larger than the load balancing object, the load cannot be released by reducing the power of the wireless access equipment, and therefore, the current wireless access equipment provides access service for the wireless user terminal to be accessed.
In one embodiment, the method further comprises the following steps:
step S40: and if the current wireless access equipment is not in the minimum transmission power state, reducing the transmission power of the current wireless access equipment.
If the load level of the current wireless access equipment is greater than the value of the wireless access equipment with the lowest load level in the load balancing object and exceeds a first set threshold value, and the current access equipment is not in the minimum transmitting power state, the coverage area of the current access equipment can be reduced by reducing the transmitting power of the current access equipment, so that partial load is released, and the load level is reduced, wherein the step can be circularly carried out for multiple times.
The wireless access device in this embodiment operates with a discrete power series as the transmission power, the discrete power series is a discrete set of values, for example {7, 13, 15, 19} dBm, where the minimum transmission power is 7dBm and the maximum transmission power is 19 dBm. In other embodiments, the wireless access device may also operate using continuous transmit power. In this embodiment, reducing the transmit power of the current access device reduces the transmit power from a higher value to one or more levels of values to a lower value.
In one embodiment, after reducing the transmission power of the current wireless access device, the method further includes the following steps:
step S50: and if the current wireless access equipment is the wireless access equipment with the lowest channel attenuation level between the current wireless access equipment and the wireless user terminal to be accessed, providing access service for the wireless user terminal to be accessed through the current wireless access equipment.
After the transmission power of the current access device is reduced, the wireless user terminal to be accessed may not detect the current wireless access device, or the wireless access device with the best signal with the wireless user terminal to be accessed may not be the current access device, so that after the transmission power of the current wireless access device is reduced, whether the wireless access device with the best channel condition with the wireless user terminal to be accessed is still the current access device is judged again, and if so, the current wireless access device provides access service for the wireless user terminal to be accessed.
In an embodiment, different from the previous embodiment, after reducing the transmission power of the current wireless access device, the method further includes the following steps:
step S60: and if the first wireless access equipment in the load balancing object of the current wireless access equipment is the wireless access equipment with the lowest channel attenuation level between the first wireless access equipment and the wireless user terminal to be accessed, providing access service for the wireless user terminal to be accessed through the first wireless access equipment.
After the transmitting power of the current wireless access equipment is reduced, if the wireless access equipment with the best channel condition with the wireless user terminal to be accessed is not the current access equipment any more but the first wireless access equipment in the load balancing object of the current wireless access equipment, the first wireless access equipment provides access service for the wireless user terminal to be accessed.
In other embodiments, the first radio access device may also continue to perform the load balancing method steps of steps S10-S50 in the above embodiments instead of directly providing the access service for the mobile user terminal to be accessed.
In this embodiment, after the current access device reduces the transmission power, some connected wireless user terminals may be kicked out, and the kicked-out wireless user terminals send out a search request to the wireless access devices in the local area network again, wherein, of the wireless access devices receiving the search request, the wireless access device with the best channel condition with the kicked-out wireless user terminal performs the steps of the load balancing method in steps S10-S50 in the above embodiments.
In an embodiment, referring to fig. 3, if a difference between the load level of the current wireless access device and the load level of the load balancing object with the lowest load level is greater than a first set threshold, the method further includes the following steps:
step S70: and if the load level of the current wireless access equipment is less than the load level of the load balancing object with the lowest load level and the current wireless access equipment is in the maximum transmitting power state, providing access service for the wireless user terminal to be accessed through the current wireless access equipment.
Step S80: and if the current wireless access equipment is not in the maximum transmitting power state, increasing the transmitting power of the current wireless access equipment, and providing access service for the wireless user terminal to be accessed by using the increased transmitting power.
If the load level of the current wireless access equipment is less than the load level of the load balancing object with the lowest load level, the load level of the current wireless access equipment is lower, and if the current wireless access equipment is not in the maximum transmitting power state, the transmitting power can be improved, the coverage range of the current wireless access equipment is enlarged, and wireless network resources are utilized more fully.
Referring to fig. 4, fig. 4 is a schematic structural diagram of a wireless local area network in the embodiment, including a server and wireless access devices AP1-AP5, where the APs 1-AP5 are connected to the server by wires, users around the AP1-AP5 represent wireless user terminals STA, a coverage area of each AP is a basic service set, and multiple basic service sets are extended to an extended service set, that is, the wireless local area network in the invention.
Referring to fig. 5, the method for load balancing of a wireless local area network based on power control according to the present invention can be simply illustrated as a problem of load balancing between at least two wireless access devices, where the wireless access devices AP1 and AP2 respectively bear 6 and 5 STA loads, but the transmission powers adopted by AP1 and AP2 are different, the size of the coverage area of the dotted line in the figure represents the size of the transmission power class, and the transmission power adopted by AP1 is smaller than the transmission power adopted by AP2, which is caused by that the channel conditions between most of the STA loads and the wireless access point 1 are better than the channel conditions between the wireless access point 2.
Referring to fig. 6, when a new STA sends a search request to the wlan, the AP1 performs the following steps:
step S101: a search request of the STA is received.
Step S102: and judging whether the access device has the best channel condition with the STA, if so, executing the step S103, and if not, recording the current load information.
Step S103: the load level of the load balancing object of the AP1 is obtained.
Step S104: it is determined whether the difference between the load level of the AP1 and the load level of the load balancing object having the lowest load level is greater than a first set threshold, and if so, step S105 is performed, and if not, step S109 is performed.
Step S105: it is determined whether the load level of the AP1 is greater than the load level of the load balancing object having the lowest load level, and if so, step S1061 is performed, and if not, step S1071 is performed.
Step S1061: the transmit power of the AP1 is reduced.
Step S1062: and judging whether the reduced transmission power of the AP1 reaches a minimum power value, if so, executing step S1063, and if not, executing step S1064.
Step S1063: the AP1 operates with minimum transmit power.
Step S1064: the AP1 operates at a reduced transmit power.
Step S1071: the transmit power of the AP1 is increased.
Step S1072: and judging whether the increased transmission power of the AP1 reaches the maximum power value, if so, executing step S1073, and if not, executing step S1074.
Step S1073: the AP1 operates at maximum transmit power.
Step S1074: the AP1 operates at an increased transmit power.
Step S108: after determining whether the AP1 is still the wireless access device with the best channel condition with the STA after decreasing or increasing the transmission power, if yes, step S109 is executed, and if no, the wireless access device with the best channel condition with the STA executes the above steps.
Step S109: the AP1 provides access services for the STA.
The steps S104 to S108 may be repeatedly performed until the load balance in the wlan is achieved.
The wireless local area network load balancing method based on power control selects the wireless access equipment with the best channel condition when the wireless user terminal is accessed, and simultaneously ensures that the load level of the wireless access equipment with the best channel condition is in a balanced range by comparing the load level of the wireless access equipment with the best channel condition with the load level of the wireless access equipment with the lowest load level in the wireless local area network, thereby ensuring the access of the wireless user terminal and improving the connection reliability of the wireless access equipment accessing the wireless local area network; meanwhile, the load balance in the wireless local area network is realized by reducing the power of the access equipment with the best channel condition but a heavier load level, the power resource is fully saved, and the energy conservation and the environmental protection are facilitated; by increasing the power of the access equipment with the best channel condition but a lighter load level, the network resources can be more fully utilized, and the method is more flexibly suitable for the changeable characteristics of the wireless network.
Referring to fig. 7, fig. 7 is a schematic structural diagram of a wireless access device in an embodiment of the present invention, a wireless access device 70 in the embodiment includes a controller 71 and a storage medium 72, where the storage medium 72 stores a computer program, and the computer program is executed by a processor to implement the steps of the wireless local area network load balancing method based on power control in any one of the above embodiments.
In this embodiment, the controller 71 may be one or more Application Specific Integrated Circuits (ASICs), Digital Signal Processors (DSPs), Digital Signal Processing Devices (DSPDs), Programmable Logic Devices (PLDs), Field Programmable Gate Arrays (FPGAs), controllers, micro-controllers, microprocessors, or other electronic components. Storage medium 72 may take the form of a computer program product embodied on one or more storage media including, but not limited to, disk storage, CD-ROM, optical storage, etc., in which the program code is embodied. Computer readable storage media, which include both non-transitory and non-transitory, removable and non-removable media, may implement any method or technology for storage of information. The information may be computer readable instructions, data structures, modules of a program, or other data. Examples of the storage medium of the computer include, but are not limited to: phase change memory (PRAM), Static Random Access Memory (SRAM), Dynamic Random Access Memory (DRAM), other types of Random Access Memory (RAM), Read Only Memory (ROM), Electrically Erasable Programmable Read Only Memory (EEPROM), flash memory or other memory technologies, compact disc read only memory (CD-ROM), Digital Versatile Discs (DVD) or other optical storage, magnetic tape storage or other magnetic storage devices, or any other non-transmission medium, may be used to store information that may be accessed by a computing device.
The wireless access device selects the wireless access equipment with the best channel condition when the wireless user terminal is accessed, and simultaneously ensures that the load level of the wireless access equipment with the best channel condition is in a balanced range by comparing the load level of the wireless access equipment with the best channel condition with the load level of the wireless access equipment with the lowest load level in the wireless local area network, thereby ensuring the access of the wireless user terminal and improving the connection reliability of the wireless access equipment accessed to the wireless local area network.
Referring to fig. 8, fig. 8 is a schematic structural diagram of a wireless access device in an embodiment of the present invention, and the wireless access device 80 in the embodiment includes a load balancing object obtaining module 81 and a computing module 82.
The load balancing object obtaining module 81 is configured to obtain a load level of a load balancing object of a current wireless access device, where the load balancing object is another wireless access device in the wireless local area network that receives a search request of a wireless user terminal to be accessed;
the operation module 82 is configured to provide an access service for the wireless user terminal to be accessed through the current wireless access device when the current wireless access device is a wireless access device with a lowest channel attenuation level with the wireless user terminal to be accessed, and if a difference between a load level of the current wireless access device and a load level of a load balancing object with the lowest load level is less than or equal to a first set threshold; and if the difference value between the load level of the current wireless access equipment and the load level of the load balancing object with the lowest load level is greater than a first set threshold value, and if the load level of the current wireless access equipment is greater than the load level of the load balancing object with the lowest load level and the current wireless access equipment is in the minimum transmitting power state, providing access service for the wireless user terminal to be accessed through the current wireless access equipment.
The wireless access equipment selects the wireless access equipment with the best channel condition when the wireless user terminal is accessed, and simultaneously ensures that the load level of the wireless access equipment with the best channel condition is in a balanced range by comparing the load level of the wireless access equipment with the best channel condition with the load level of the wireless access equipment with the lowest load level in the wireless local area network, thereby ensuring the access of the wireless user terminal and improving the connection reliability of the wireless access equipment accessed to the wireless local area network.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention.
Claims (9)
1. A wireless local area network load balancing method based on power control is characterized by comprising the following steps:
acquiring the load level of a load balancing object of the current wireless access equipment, wherein the load balancing object is other wireless access equipment which receives a search request of a wireless user terminal to be accessed in a wireless local area network;
if the current wireless access equipment is the wireless access equipment with the lowest channel attenuation level between the current wireless access equipment and the wireless user terminal to be accessed, and if the difference value between the load level of the current wireless access equipment and the load level of the load balancing object with the lowest load level is less than or equal to a first set threshold value, providing access service for the wireless user terminal to be accessed through the current wireless access equipment;
and if the difference value between the load level of the current wireless access equipment and the load level of the load balancing object with the lowest load level is greater than a first set threshold value, and if the load level of the current wireless access equipment is greater than the load level of the load balancing object with the lowest load level and the current wireless access equipment is in the minimum transmitting power state, providing access service for the wireless user terminal to be accessed through the current wireless access equipment.
2. The method for balancing load of wireless local area network based on power control as claimed in claim 1, further comprising the steps of:
and if the current wireless access equipment is not in the minimum transmission power state, reducing the transmission power of the current wireless access equipment.
3. The method for balancing load of wireless local area network based on power control as claimed in claim 1, further comprising the steps of:
and if the load level of the current wireless access equipment is less than the load level of the load balancing object with the lowest load level and the current wireless access equipment is in the maximum transmitting power state, providing access service for the wireless user terminal to be accessed through the current wireless access equipment.
4. The method of claim 3, further comprising the steps of:
and if the current wireless access equipment is not in the maximum transmitting power state, increasing the transmitting power of the current wireless access equipment, and providing access service for the wireless user terminal to be accessed by using the increased transmitting power.
5. The method of claim 2, wherein after reducing the transmission power of the current wireless access device, the method further comprises the following steps:
and if the current wireless access equipment is the wireless access equipment with the lowest channel attenuation level between the current wireless access equipment and the wireless user terminal to be accessed, providing access service for the wireless user terminal to be accessed through the current wireless access equipment.
6. The method of claim 2, wherein after reducing the transmission power of the current wireless access device, the method further comprises the following steps:
and if the first wireless access equipment in the load balancing object of the current wireless access equipment is the wireless access equipment with the lowest channel attenuation level between the first wireless access equipment and the wireless user terminal to be accessed, providing access service for the wireless user terminal to be accessed through the first wireless access equipment.
7. The method for load balancing of wireless local area network based on power control as claimed in claim 1, wherein obtaining the load level of the load balancing object of the current wireless access device comprises the following steps:
creating a load balancing object list;
acquiring load information of wireless access equipment in a wireless local area network;
and acquiring a load balancing object of the current wireless access equipment according to the information of the wireless access equipment detected and broadcasted by the wireless user terminal to be accessed, and storing the load level of the load balancing object in the load balancing object list.
8. A wireless access apparatus, comprising: a controller and a storage medium having stored thereon a computer program which, when executed by a processor, performs the steps of the power control based wireless local area network load balancing method according to any one of claims 1 to 7.
9. A wireless access device, comprising:
the load balancing object acquisition module is used for acquiring the load level of a load balancing object of the current wireless access equipment, wherein the load balancing object is other wireless access equipment which receives a search request of a wireless user terminal to be accessed in a wireless local area network;
the operation module is used for providing access service for the wireless user terminal to be accessed through the current wireless access equipment when the current wireless access equipment is the wireless access equipment with the lowest channel attenuation level between the current wireless access equipment and the wireless user terminal to be accessed and if the difference value between the load level of the current wireless access equipment and the load level of the load balancing object with the lowest load level is less than or equal to a first set threshold value; and if the difference value between the load level of the current wireless access equipment and the load level of the load balancing object with the lowest load level is greater than a first set threshold value, and if the load level of the current wireless access equipment is greater than the load level of the load balancing object with the lowest load level and the current wireless access equipment is in the minimum transmitting power state, providing access service for the wireless user terminal to be accessed through the current wireless access equipment.
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