CN105792257A

CN105792257A - Adaptive wireless receiving method and apparatus of wireless local area network

Info

Publication number: CN105792257A
Application number: CN201610134246.7A
Authority: CN
Inventors: 李长柏
Original assignee: Shanghai Feixun Data Communication Technology Co Ltd
Current assignee: Hangzhou Jiji Intellectual Property Operation Co., Ltd
Priority date: 2016-03-09
Filing date: 2016-03-09
Publication date: 2016-07-20
Anticipated expiration: 2036-03-09
Also published as: CN105792257B

Abstract

The invention provides an adaptive wireless receiving method of a wireless local area network. The method comprises: channel energy is detected; the detected channel energy is compared with a channel energy threshold; and when the detected channel energy is determined to be less than the channel energy threshold, a receiving gain parameter value is adjusted to realize adaptive wireless receiving. In addition, the invention also provides an adaptive wireless receiving apparatus of a wireless local area network. Therefore, wireless local area network equipment can be triggered by the channel energy threshold according to the environment interference situation so as to adjust the receiving gain of the wireless signal dynamically; and thus the throughput capacity of the wireless receiving signal can be improved under the circumstance that the interference is large.

Description

A kind of WLAN adaptive wireless method of reseptance and device

Technical field

The invention mainly relates to WLAN radio access technology field, especially, relate to one WLAN adaptive wireless method of reseptance and device.

Background technology

WLAN technology be use ISM band a kind of RF technology, mainly 2.4GHz and 5.8GHz, RF communication anti-interference capability is far inferior to wire communication, many in the band interference source of ISM Many, there is the interference of co-channel interference, adjacent frequency, overstate frequency interference have 802.11 from signal distinguishing from frequency band differentiation Interference and non-802.11 interference (mainly having frequency hopping bluetooth, micro-wave oven, radar), WLAN Interference derives from conflict and keeps out of the way, and interference exacerbates again conflict and keeps out of the way, and multiple equipment transmit simultaneously Causing when eating dishes without rice or wine collision, receiving terminal cannot normal analytic message.Transmitting terminal retransmits to keep out of the way and makes to have leisure Not busy waiting time is elongated, and reduces channel seizure ratio.Interference avoid and abatement ability is WLAN One key characteristic of product, will affect the performance of system, stability, robustness.

WLAN is not only the network access mode of a kind of simplicity, many important application, such as language The service such as sound, video, location is the most gradually deployed on wireless network, along with the increase of application, nothing It is aobvious prominent that line interference problem affects day to the quality of network service, even if common network accesses, User is it is also desirable that bandwidth is the highest more good.In the environment of high-density deployment, the meeting as spacious is big The Room, students' dormitory, library etc., AP deployment density is bigger, and distance is near, signal intensity ratio Common scenarios is eager to excel, and the energy that channel detects can easily exceed CCA thresholding, often can cause Interfering serious between the AP of cochannel, wlan device should be lifted at further and interfere In the case of available bandwidth is low, poor stability problem, to promote Consumer's Experience.

Due to WLAN technical characterstic, to determine the interference free performance of wlan system more weak, at present Traditional has three methods solving the interference of wlan device wireless signal, including reducing physics number The channel distribution according to transfer rate, adjusting AP and minimizing are disturbed the through-put power of AP.

Under specific circumstances, each of which is the most effective for above-mentioned three kinds of methods, but these three method does not has There is one can be fully solved this problem of radio interference.

The message transmission rate reducing AP can not get a desired effect, and the packet hang time becomes Obtaining longer, it means that need to take more time to be received, the probability therefore substitute is bigger, This allows them the most sensitive to PERIODIC INTERFERENCE on the contrary, this solution cause all share this The user of AP is affected.

For the method changing channel, after radio interference increases, interference generally all has interval Property and capricious feature, owing to the channel quantity being available for changing is limited, this kind of technology is on the contrary More problem can be brought.

Reducing AP through-put power and use limited channel with more preferable, it is same that this needs minimizing to share The quantity of the equipment of individual AP, do so can improve performance, but be reduction of through-put power and also can Reducing the receiving intensity of signal, this has reformed into reduction data transmission rate, and Wi-Fi covering simultaneously will Starting a leak, these leaks need to use more AP to fill up, and increase AP quantity and incite somebody to action Can cause more disturbing.

At present, in wlan system AP or terminal by channel being carried out the side of energy measuring Formula judges channel idle, is come by test antenna opening energy and decision received signal strength RSSI Completing, current common practice is when detecting that the energy of certain channel is more than CCA thresholding, it is believed that Channel busy, does not sends at this channel, when the energy certain channel being detected is less than CCA thresholding, Thinking channel idle, use this channel to send, this way is detecting that periphery has wireless signal disturbing Time, channel can be avoided by automatically adjusting frequency range pattern, but channel reuse degree is low, available band Width is low and signal stabilization is poor.

Summary of the invention

In order to solve above-mentioned technical problem, the present invention proposes a kind of WLAN adaptive wireless Method of reseptance, it is characterised in that described method includes: detection channel energy；

The channel energy detected is compared with described channel energy threshold；

When confirming the channel energy detected less than described channel energy threshold, adjust and receive gain Parameter value, receives with adaptive wireless.

Further, described adjustment receives gain parameter value, specifically includes:

In receiving sensitivity interval, improve described reception gain parameter value.

Further, after described reception gain parameter value improves, when detecting that channel energy is more than During described channel energy threshold, adjust described reception gain parameter for receiving gain parameter initial value.

Further, before described detection channel energy, described method also includes: arrange channel Energy threshold triggers wireless receiving.

Further, the channel energy detected is being compared with described channel energy threshold Before, described method also includes: arrange reception gain parameter initial value.

The present invention also proposes a kind of WLAN adaptive wireless and receives device, it is characterised in that Described device includes:

Detection module, is used for detecting channel energy；

Comparison module, for comparing the channel energy detected with described channel energy threshold；

Adjusting module, for when confirming that the channel energy detected is less than described channel energy threshold Time, adjust and receive gain parameter value, receive with adaptive wireless.

Further, described adjusting module, specifically in receiving sensitivity interval, improves institute State reception gain parameter value.

Further, described adjusting module, it is additionally operable to after described reception gain parameter value improves, When detecting that channel energy is more than described channel energy threshold, adjusting described reception gain parameter is Receive gain parameter initial value.

Further, described device also includes:

First arranges module, for, before described detection module detection channel energy, arranging channel Energy threshold triggers wireless receiving.

Further, described device also includes:

Second arranges module, is used for the channel energy detected and described letter at described comparison module Before road energy threshold compares, reception gain parameter initial value is set.

Technical solution of the present invention is by detection channel energy；By the channel energy detected and described letter Road energy threshold compares；When confirming that the channel energy detected is less than described channel energy threshold Time, adjust and receive gain parameter value, receive with adaptive wireless.So, WLAN devices Can be triggered by channel energy threshold according to environmental disturbances situation, dynamically adjust connecing of wireless signal Receive gain, reach to improve the handling capacity of wireless reception of signals in the case of larger interference.

Accompanying drawing explanation

For the technical scheme being illustrated more clearly that in the embodiment of the present application, embodiment will be retouched below In stating, the required accompanying drawing used is briefly described, it should be apparent that, the accompanying drawing in describing below It is only some embodiments of the application, for those of ordinary skill in the art, is not paying On the premise of creative work, it is also possible to obtain other accompanying drawing according to these accompanying drawings, wherein:

Fig. 1 is the stream of a kind of embodiment of the WLAN adaptive reception method that the present invention provides Journey schematic diagram；

Fig. 2 is the stream of a kind of embodiment adjusting the method receiving gain parameter value that the present invention provides Journey schematic diagram；

Fig. 3 be the present invention provide detect that channel energy is more than the processing method of channel energy threshold The schematic flow sheet of a kind of embodiment；

Fig. 4 is a kind of specific embodiment of the pre-treating method of the detection channel energy that the present invention provides Schematic flow sheet；

Fig. 5 is that the channel energy detected that the present invention provides compares with described channel energy threshold Structural representation than a kind of embodiment of pre-treating method；

Fig. 6 is the another kind of embodiment of the WLAN adaptive reception method that the present invention provides Schematic flow sheet；

Fig. 7 is that the WLAN adaptive wireless that the present invention provides receives a kind of concrete real of device Execute the structural representation of example；

Fig. 8 is that the WLAN adaptive wireless that the present invention provides receives the another kind of concrete of device The structural representation of embodiment；

Fig. 9 is that the WLAN adaptive wireless that the present invention provides receives the another kind of concrete of device The structural representation of embodiment.

Detailed description of the invention

Technical solution of the present invention is by detection channel energy；By the channel energy detected and described letter Road energy threshold compares；When confirming that the channel energy detected is less than described channel energy threshold Time, adjust and receive gain parameter value, receive with adaptive wireless.

In order to make the application be solved the technical problem that, technical scheme and beneficial effect more clear bright In vain, below in conjunction with drawings and Examples, the application is further elaborated.Should be appreciated that Specific embodiment described herein, only in order to explain the application, is not used to limit the application.

Fig. 1 is the stream of a kind of embodiment of the WLAN adaptive reception method that the present invention provides Journey schematic diagram, idiographic flow is as follows:

Step S101, detects channel energy；

Specifically, by channel energy is detected, according to detection result determine whether be No triggering carries out wireless receiving by this channel.

Step S102, compares the channel energy detected with channel energy threshold；

Specifically, channel energy threshold pre-sets, and is used for triggering channel wireless and receives.

Step S103, when confirming the channel energy detected less than channel energy threshold, adjustment connects Receive gain parameter value, receive with adaptive wireless.

Specifically, when the channel energy detected is less than channel energy threshold, adjusts and receive gain Parameter value, so that channel energy reaches channel energy threshold, triggers this channel self-adapting and carries out wireless Receive.

Wherein, step S103 adjust shown in the method as accompanying drawing 2 receiving gain parameter value, tool Body flow process is as follows:

Step S201, in receiving sensitivity interval；

Specifically, adjust and receive gain parameter value, first have to ensure the receiving sensitivity before and after adjusting In receiving sensitivity interval, such as, receiving sensitivity can be set according to actual conditions oneself interval For 0.2dB, 0.5dB, 0.8dB etc..

Step S202, improves and receives gain parameter value；

Specifically, reception gain parameter value is improved, it is ensured that in receiving sensitivity interval, increase connects Receive gain parameter value, make channel energy reach channel energy threshold；

Also just say, when channel energy is less than channel energy threshold, it is ensured that interval in receiving sensitivity In, trigger reception gain parameter and make it improve on the basis of initial value, so, signal is strong Degree improves therewith, and channel energy increases therewith and reaches channel energy threshold, so can make wireless connecing Receipts handling capacity is increased.

Detecting shown in the processing method as accompanying drawing 3 that channel energy is more than channel energy threshold, tool Body step is as follows:

Step S301, after receiving the raising of gain parameter value；

Specifically, receive gain parameter and improve, necessarily cause channel energy to increase.

Step S302, detects that channel energy is more than channel energy threshold；

Specifically, channel energy increases to a certain degree, and channel energy can be more than channel energy threshold.

Step S303, adjusts and receives gain parameter for receiving gain parameter initial value.

Specifically, when channel energy is more than channel energy threshold, the reception after adjustable improves increases Benefit parameter value rollback is for receiving gain parameter initial value.

Fig. 4 is a kind of specific embodiment of the pre-treating method of the detection channel energy that the present invention provides Schematic flow sheet, specifically comprise the following steps that

Step S401, arranges channel energy threshold and triggers wireless receiving；

Specifically, preset channel energy threshold, with the channel energy threshold preset as trigger condition, Trigger wireless receiving.

Step S402, detects channel energy.

Fig. 5 is the channel energy detected being compared with channel energy threshold of providing of the present invention Than the schematic flow sheet of a kind of specific embodiment of pre-treating method, specifically comprise the following steps that

Step S501, arranges reception gain parameter initial value；

Specifically, reception gain parameter initial value is pre-set according to actual.

Step S502, is comparing the channel energy detected with channel energy threshold.

Specifically, the channel energy detected is compared size with channel energy threshold；

When the channel energy detected is less than channel energy threshold, reception gain parameter can be improved Value, it is therefore an objective to increase the channel energy detected, enable the channel energy detected to reach channel Energy threshold, to trigger wireless receiving；But it should be noted that and improving reception gain parameter value Time, it is ensured that before and after receiving the raising of gain parameter value, the change of receiving sensitivity is in receiving sensitivity district In.

When the channel energy detected is more than channel energy threshold, directly trigger wireless receiving, this Not in scope, the most just repeat no more.

Fig. 6 is the another kind of embodiment of the WLAN adaptive reception method that the present invention provides Schematic flow sheet, specifically comprises the following steps that

Step S601, arranges CCA thresholding；

Specifically, CCA thresholding is set, is channel idle thresholding, judge letter by channel energy Road is the most idle, so arranging CCA thresholding to arrange channel energy threshold exactly；With default letter Road energy threshold, as trigger condition, triggers wireless receiving.

Step S602, arranges reception gain initial value；

Specifically, pre-set reception gain parameter initial value according to actual, reception gain ginseng is set Cross after predetermined amount of time after numerical value, then perform step S603, here, predetermined amount of time be 0.1S, 0.2S, 0.5S, 1S etc., stay this scheduled times enough mainly to the process processed that prestores.

Step S603, detects CCA value；

Step S604, CCA value is less than CCA thresholding？

Specifically, if less than entering step S605, otherwise, step S602 is entered；

Step S605, adjusts and receives gain parameter value；

Specifically, when confirming the channel energy detected less than channel energy threshold, adjust and receive Gain parameter value, receives with adaptive wireless.

Step S606, interval in receiving sensitivity？

Specifically, if interval in receiving sensitivity, enter step S607, otherwise, enter step S605；

Step S607, carries out wireless receiving.

Specifically, adjust and receive gain parameter value, first have to ensure the receiving sensitivity before and after adjusting In receiving sensitivity interval, such as, receiving sensitivity can be set according to actual conditions oneself interval For 0.2dB, 0.5dB, 0.8dB etc.；

Receiving before and after gain parameter value adjusts, receiving sensitivity is all in receiving sensitivity interval, then Wireless receiving can be carried out.

Fig. 7 is that the WLAN adaptive wireless that the present invention provides receives a kind of concrete real of device Executing the structural representation of example, adaptive wireless receives device 70 and includes detection module 71, compares mould Block 72 and adjusting module 73,

Detection module 71, is used for detecting channel energy；

Comparison module 72, for comparing the channel energy detected with described channel energy threshold；

Adjusting module 73, during for being less than channel energy threshold when the channel energy confirming to detect, Adjust and receive gain parameter value, receive with adaptive wireless.

Wherein, adjusting module 73, specifically in receiving sensitivity interval, improves and receives gain Parameter value.

Improve and receive gain parameter value, it is ensured that in receiving sensitivity interval, increase and receive gain ginseng Numerical value, makes channel energy reach channel energy threshold；

Adjusting module 73, is additionally operable to after described reception gain parameter value improves, when channel being detected When energy is more than described channel energy threshold, adjust described reception gain parameter for receiving gain parameter Initial value.

Specifically, receive gain parameter and improve, necessarily cause channel energy to increase；Channel energy increases The most to a certain extent, channel energy can be more than channel energy threshold；In channel energy more than channel energy During amount thresholding, the reception gain parameter value rollback after adjustable improves is initial for receiving gain parameter Value.

Wherein, adaptive wireless reception device 70 also includes that first arranges module 74 specifically such as accompanying drawing Shown in 8, particularly as follows:

First arranges module 74, for, before described detection module detection channel energy, arranging letter Road energy threshold triggers wireless receiving.

It addition, in this accompanying drawing, adaptive wireless receives device 70 and also includes detection module 71, ratio Relatively module 72 and adjusting module 73, here, detection module 71, comparison module 72 and adjustment mould Block 73 as shown in Figure 7, repeats no more here.

Wherein, adaptive wireless reception device 70 also includes that first arranges module 74 specifically such as accompanying drawing Shown in 9, particularly as follows:

Second arranges module 75, at described comparison module by the channel energy that detects with described Before channel energy threshold compares, reception gain parameter initial value is set.

It addition, in this accompanying drawing, adaptive wireless receives device 70 and also includes detection module 71, ratio Relatively module 72, adjusting module 73 and first arrange module 74, here, detection module 71, compare As shown in Figure 7, first arranges module 74 as shown in Figure 8 for module 72, adjusting module 73, Here repeat no more.

Should be appreciated that the adaptive wireless of the WLAN that the present embodiment provides receives device 50 Functional module can be the functional module of software module or software and hardware combining, it can be by place Reason device performs and realizes function as above.Further, the adaptive wireless of WLAN receives Device 50 can also have other functional modules and realize, according to environmental disturbances situation, passing through channel Energy threshold triggers, and dynamically adjusts the reception gain of wireless signal, reaches in the case of larger interference Improve the handling capacity of wireless reception of signals.Specifically can retouching accordingly refering to above method embodiment State.

It addition, person of ordinary skill in the field is understood that realizes said method embodiment All or part of step can be completed by the hardware that programmed instruction is relevant, and aforesaid program is permissible It is stored in computer read/write memory medium, and is performed by the processor within communication, aforesaid Program processor when executed can perform to include all or part of of said method embodiment Step.Wherein, described processor can be implemented as one or more processor chips, or can Think one or more special IC (Application Specific Integrated Circuit, ASIC) a part；And aforesaid storage medium can include but not limited to following kind of storage Medium: flash memory (Flash Ieiory), memory (Read-Ojly Ieiory, ROI), deposit at random Access to memory (Rajdoi Access Ieiory, RAI), portable hard drive, magnetic disc or CD etc. are each Plant the medium that can store program code.

Last it is noted that above example is only in order to illustrate the technical scheme of the application, rather than It is limited；Although the application being described in detail with reference to previous embodiment, this area Those of ordinary skill is it is understood that it still can be to the technical scheme described in foregoing embodiments Modify, or wherein portion of techniques feature is carried out equivalent；And these are revised or replace Change, do not make the essence of appropriate technical solution depart from the scope of the application each embodiment technical scheme.

Claims

1. a WLAN adaptive wireless method of reseptance, it is characterised in that described method Including:

Detection channel energy；

2. the method for claim 1, it is characterised in that described adjustment receives gain ginseng Numerical value, specifically includes:

3. method as claimed in claim 2, it is characterised in that in described reception gain parameter After value improves, when detecting that channel energy is more than described channel energy threshold, adjust described reception Gain parameter is for receiving gain parameter initial value.

4. the method for claim 1, it is characterised in that in described detection channel energy Before, described method also includes: arranges channel energy threshold and triggers wireless receiving.

5. method as claimed in claim 4, it is characterised in that at the channel energy that will detect Before amount and described channel energy threshold compare, described method also includes: arrange reception gain Initial parameter value.

6. a WLAN adaptive wireless receives device, it is characterised in that described device Including:

Detection module, is used for detecting channel energy；

7. device as claimed in claim 6, it is characterised in that described adjusting module, specifically For in receiving sensitivity interval, improve described reception gain parameter value.

8. device as claimed in claim 7, it is characterised in that described adjusting module, also uses After improving in described reception gain parameter value, when detecting that channel energy is more than described channel energy During thresholding, adjust described reception gain parameter for receiving gain parameter initial value.

9. device as claimed in claim 6, it is characterised in that described device also includes:

10. device as claimed in claim 9, it is characterised in that described device also includes: