CN104093190A - Terminal access method and access system for WLAN system - Google Patents
Terminal access method and access system for WLAN system Download PDFInfo
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- CN104093190A CN104093190A CN201410267817.5A CN201410267817A CN104093190A CN 104093190 A CN104093190 A CN 104093190A CN 201410267817 A CN201410267817 A CN 201410267817A CN 104093190 A CN104093190 A CN 104093190A
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Abstract
The invention provides a terminal access method and access system for a WLAN system. The WLAN system can work at the first frequency band and the second frequency band, and each frequency band of the first frequency band and each frequency band of the second frequency band are provided with at least one channel. The terminal access method comprises the step of judging whether a terminal to be access to a network simultaneously supports the first frequency band and the second frequency band, guiding the terminal to be access to an appointed channel in the first frequency band if the terminal only supports the first frequency band, and guiding the terminal to be access to an appointed channel of the second frequency band if the terminal supports the first frequency band and the second frequency band. According to the technical scheme of the terminal access method and access system, the burden of one single frequency band and/or one single channel can be relieved, the load between a plurality of frequency bands and channels can be balanced, the system performance and the user experience are improved, and meanwhile the system deployment cost can be reduced.
Description
Technical field
The present invention relates to communication technical field, in particular to a kind of terminal access method for wlan system and a kind of terminal connecting system for wlan system.
Background technology
At present, WLAN (Wireless Local Area Network, WLAN (wireless local area network)) have two kinds of job engineering forms, be IBSS (Independent Basic Service Set, independent basic service set) and BSS (Basic Service Set, Basic Service Set).IBSS is the network element that the terminal of Ad hoc (point-to-point) mode independently forms, and there is no fixing infrastructure under this networking mode, and all terminal directly interconnects with other-end, and network organization is very independent.BSS is basic schema, comprises that at least one AP (Access Point, access point), as the management equipment of network, manages all Station (work station, hereinafter to be referred as STA), and provides access and transmission service to STA.
For the coverage of extended wireless lan, increase the mobility of terminal, multiple BSS can constitute jointly ESS (Extend Service Set, extended service set).Extended service set is distinguished by extended service set identifier ESSID, and AP distinguishes by Basic Service Set identifier BSSID.
802.11b/g/n is generally operational in the frequency range of 2.4GHz, and 2.4GHz band limits is 2.4-2.483GHz, only has 1,6,11 3 non-interfering channel, and the bandwidth of each channel is 20MHz, and channel quantity in the 5GHz frequency range of 802.11an work is more.
In existing wlan system, multiple AP are operated in different wireless channels, by wired distributing system interconnection.In the scope that terminal can cover at ESS, move freely, and along with a mobile AP in ESS is switched to another AP.But, in the higher occasion of Station density, need to dispose multiple AP, cost is higher, and deployment complexity., concentrate in expansion service, because multiple AP are operated on different channels, therefore load information can not carry out alternately, causing load balancing more difficult easily meanwhile.
Therefore, how to alleviate the pressure of single frequency band, the load between balanced multiple frequency ranges, the system of elevator system, and the cost that reduction system is disposed becomes technical problem urgently to be resolved hurrily.
Summary of the invention
The present invention just based on above-mentioned technical problem one of at least, a kind of new terminal access scheme for wlan system has been proposed, can alleviate the pressure of single frequency band and/or single channel, the load of balanced multiple frequency ranges and interchannel, be conducive to the performance of elevator system and user's experience, the cost of simultaneously can reduction system disposing.
In view of this, the present invention proposes a kind of terminal access method for wlan system, described wlan system can be operated in the first frequency range and the second frequency range, and each frequency range in described the first frequency range and described the second frequency range disposes at least one channel, described terminal access method, comprising: whether the terminal that judges network to be accessed supports described the first frequency range and described the second frequency range simultaneously; In the time judging that described terminal is only supported described the first frequency range, guide described terminal to access the allocated channel in described the first frequency range, and in the time judging that described terminal is supported described the first frequency range and described the second frequency range, guide described terminal to access the allocated channel in described the second frequency range.
In this technical scheme, by whether support double frequency (supporting the first frequency range and the second frequency range) to judge to terminal simultaneously, making can be in the time that terminal be only supported the first frequency range, guiding terminal accesses the channel of the first frequency range, and in the time that terminal is supported the first frequency range and the second frequency range, can access the channel of the second frequency range by guiding terminal, and then can avoid terminal to increase the load of the first frequency range supporting also to access the first frequency range when double frequency, alleviate the pressure of the first frequency range.Particularly, the first frequency range can be 2.4GHz frequency range, and the second frequency range can be 5GHz frequency range.Wherein, above-mentioned wlan system can be by connecting multiple WLAN radio frequency unit compositions on WLAN chip, wherein each WLAN radio frequency unit can be operated in respectively the first frequency range (as 2.4GHz) or the second frequency range (as 5GHz), for the different WLAN radio frequency units that are operated in same frequency range, different channels can be set, each channel can access multiple terminals, therefore, than the scheme that need to increase multiple AP in correlation technique in the intensive place of terminal, the application's technical scheme is disposed simple, and can effectively reduce lower deployment cost.
In technique scheme, preferably, judge whether described terminal supports the step of described the first frequency range and described the second frequency range to be specially simultaneously: in the given time, only receive the broadcast probe request information that described terminal sends, do not send the echo message to described broadcast probe request information; If within the described scheduled time, receive that described terminal sends simultaneously for the broadcast probe request information of described the first frequency range with for the broadcast probe request information of described the second frequency range, judge that described terminal supports described the first frequency range and described the second frequency range, if and within the described scheduled time, only receive the broadcast probe request information for described the first frequency range that described terminal sends, judge that described terminal only supports described the first frequency range.
In this technical scheme, if do not respond the broadcast probe request information of terminal, terminal can constantly send broadcast probe request information at different frequency range (supporting under the prerequisite of multifrequency), therefore can not respond in the given time the broadcast probe request information that terminal sends, to determine the frequency range at the broadcast probe request information place that receives terminal transmission, and then the frequency range of definite terminal support.Certainly, be 2.4GHz in the first frequency range, when the second frequency range is 5GHz, because terminal is all supported 2.4GHz frequency range substantially, therefore in order to alleviate the frequency range of 2.4GHz, can be in the time receiving the broadcast probe request information that terminal pins sends 2.4GHz frequency range, do not respond, and in the time receiving the broadcast probe request information that terminal pins sends 5GHz frequency range, directly respond, directly access 5GHz frequency range with guiding terminal.
In technique scheme, preferably, also comprise: the signal strength signal intensity of the described broadcast probe request information sending on each channel of described each frequency range according to described terminal is determined the signal strength signal intensity of described each channel; Select the channel of signal strength signal intensity maximum in described the first frequency range as the allocated channel in described the first frequency range, and select the channel of signal strength signal intensity maximum in described the second frequency range as the allocated channel in described the second frequency range.
In this technical scheme, by selecting the channel of signal strength signal intensity maximum for terminal access, can guarantee that terminal has higher communication quality.In addition, because terminal can send broadcast probe request information at different channel, therefore can be by determine that the signal strength signal intensity of the broadcast probe request information receiving determines the signal strength signal intensity of each channel on each channel.
In technique scheme, preferably, the step that guides described terminal to access the allocated channel in described the first frequency range is specially: when receiving while sending described broadcast probe request information on the allocated channel of described terminal in described the first frequency range, send echo message to described terminal; The step that guides described terminal to access the allocated channel in described the second frequency range is specially: when receiving while sending described broadcast probe request information on the allocated channel of described terminal in described the second frequency range, send echo message to described terminal.
In technique scheme, preferably, described each frequency range comprises multiple channels; Described terminal access method also comprises: the utilance that detects each channel in described multiple channel; When in described multiple channels, the difference of the utilance of any two channels is greater than predetermined threshold, other channels in described at least one channel of terminal access that in described any two channels of guiding access, the channel of utilance maximum and signal strength signal intensity are the strongest.
In this technical scheme, by in the time that the difference of utilance of determining any two channels is greater than predetermined threshold, channel and the strongest terminal of signal strength signal intensity of guiding access channel utilization maximum access other channels, can alleviate on the one hand the pressure of busy channel (being the channel that utilance is larger), the load of balanced multiple interchannels, the performance of elevator system and user experience; Also the communication quality that can avoid on the other hand the terminal a little less than signal strength signal intensity to access other channels and affect terminal.
According to a second aspect of the invention, a kind of terminal connecting system for wlan system has also been proposed, described wlan system can be operated in the first frequency range and the second frequency range, and each frequency range in described the first frequency range and described the second frequency range disposes at least one channel, described terminal connecting system, comprise: judging unit, for judge whether the terminal of network to be accessed supports described the first frequency range and described the second frequency range simultaneously; Processing unit, for in the time that described judging unit judges that described terminal is only supported described the first frequency range, guide described terminal to access the allocated channel in described the first frequency range, and in the time that described judging unit judges that described terminal is supported described the first frequency range and described the second frequency range, guide described terminal to access the allocated channel in described the second frequency range.
In this technical scheme, by whether support double frequency (supporting the first frequency range and the second frequency range) to judge to terminal simultaneously, making can be in the time that terminal be only supported the first frequency range, guiding terminal accesses the channel of the first frequency range, and in the time that terminal is supported the first frequency range and the second frequency range, can access the channel of the second frequency range by guiding terminal, and then can avoid terminal to increase the load of the first frequency range supporting also to access the first frequency range when double frequency, alleviate the pressure of the first frequency range.Particularly, the first frequency range can be 2.4GHz frequency range, and the second frequency range can be 5GHz frequency range.Wherein, above-mentioned wlan system can be by connecting multiple WLAN radio frequency unit compositions on WLAN chip, wherein each WLAN radio frequency unit can be operated in respectively the first frequency range (as 2.4GHz) or the second frequency range (as 5GHz), for the different WLAN radio frequency units that are operated in same frequency range, different channels can be set, each channel can access multiple terminals, therefore, than the scheme that need to increase multiple AP in correlation technique in the intensive place of terminal, the application's technical scheme is disposed simple, and can effectively reduce lower deployment cost.
In technique scheme, preferably, also comprise: interactive unit, in the given time, only receive the broadcast probe request information that described terminal sends, do not send the echo message to described broadcast probe request information; Described judging unit specifically for, if within the described scheduled time, receive that described terminal sends simultaneously for the broadcast probe request information of described the first frequency range with for the broadcast probe request information of described the second frequency range, judge that described terminal supports described the first frequency range and described the second frequency range, if and within the described scheduled time, only receive the broadcast probe request information for described the first frequency range that described terminal sends, judge that described terminal only supports described the first frequency range.
In this technical scheme, if do not respond the broadcast probe request information of terminal, terminal can constantly send broadcast probe request information at different frequency range (supporting under the prerequisite of multifrequency), therefore can not respond in the given time the broadcast probe request information that terminal sends, to determine the frequency range at the broadcast probe request information place that receives terminal transmission, and then the frequency range of definite terminal support.Certainly, be 2.4GHz in the first frequency range, when the second frequency range is 5GHz, because terminal is all supported 2.4GHz frequency range substantially, therefore in order to alleviate the frequency range of 2.4GHz, can be in the time receiving the broadcast probe request information that terminal pins sends 2.4GHz frequency range, do not respond, and in the time receiving the broadcast probe request information that terminal pins sends 5GHz frequency range, directly respond, directly access 5GHz frequency range with guiding terminal.
In technique scheme, preferably, described processing unit also for: the described broadcast probe request information sending on each channel of described each frequency range according to described terminal is determined the signal strength signal intensity of described each channel; Select the channel of signal strength signal intensity maximum in described the first frequency range as the allocated channel in described the first frequency range, and select the channel of signal strength signal intensity maximum in described the second frequency range as the allocated channel in described the second frequency range.
In this technical scheme, by selecting the channel of signal strength signal intensity maximum for terminal access, can guarantee that terminal has higher communication quality.In addition, because terminal can send broadcast probe request information at different channel, therefore can be by determine that the signal strength signal intensity of the broadcast probe request information receiving determines the signal strength signal intensity of each channel on each channel.
In technique scheme, preferably, described processing unit specifically for: when receiving while sending described broadcast probe request information on the allocated channel of described terminal in described the first frequency range, send echo message to described terminal, to guide described terminal to access the allocated channel in described the first frequency range; And when receiving while sending described broadcast probe request information on the allocated channel of described terminal in described the second frequency range, send echo message to described terminal, to guide described terminal to access the allocated channel in described the second frequency range.
In technique scheme, preferably, described each frequency range comprises multiple channels; Described terminal connecting system also comprises: detecting unit, for detection of the utilance of each channel in described multiple channels; Described processing unit also for, when in the utilance of the described each channel detecting according to described detecting unit is judged described multiple channels, the difference of the utilance of any two channels is greater than predetermined threshold, other channels in described at least one channel of terminal access that in described any two channels of guiding access, the channel of utilance maximum and signal strength signal intensity are the strongest.
In this technical scheme, by in the time that the difference of utilance of determining any two channels is greater than predetermined threshold, channel and the strongest terminal of signal strength signal intensity of guiding access channel utilization maximum access other channels, can alleviate on the one hand the pressure of busy channel (being the channel that utilance is larger), the load of balanced multiple interchannels, the performance of elevator system and user experience; Also the communication quality that can avoid on the other hand the terminal a little less than signal strength signal intensity to access other channels and affect terminal.
By above technical scheme, can alleviate the pressure of single frequency band and/or single channel, the load of balanced multiple frequency ranges and interchannel, is conducive to the performance of elevator system and user's experience.
Brief description of the drawings
Fig. 1 shows according to an embodiment of the invention the schematic flow diagram for the terminal access method of wlan system;
Fig. 2 shows the hardware configuration schematic diagram of wlan system according to an embodiment of the invention;
Fig. 3 A shows the radiation diagram being combined into when four base band are with frequency range according to an embodiment of the invention;
Fig. 3 B shows the radiation diagram being combined into when three base band are with frequency range according to an embodiment of the invention;
Fig. 3 C shows the radiation diagram being combined into when two base band are with frequency range according to an embodiment of the invention;
Fig. 4 shows according to an embodiment of the invention the schematic block diagram for the terminal connecting system of wlan system.
Embodiment
In order more clearly to understand above-mentioned purpose of the present invention, feature and advantage, below in conjunction with the drawings and specific embodiments, the present invention is further described in detail.It should be noted that, in the situation that not conflicting, the feature in the application's embodiment and embodiment can combine mutually.
A lot of details are set forth in the following description so that fully understand the present invention; but; the present invention can also adopt other to be different from other modes described here and implement, and therefore, protection scope of the present invention is not subject to the restriction of following public specific embodiment.
Fig. 1 shows according to an embodiment of the invention the schematic flow diagram for the terminal access method of wlan system.
As shown in Figure 1, according to an embodiment of the invention for the terminal access method of wlan system, described wlan system can be operated in the first frequency range and the second frequency range, and each frequency range in described the first frequency range and described the second frequency range disposes at least one channel, described terminal access method, comprise: step 102, judges whether the terminal of network to be accessed supports described the first frequency range and described the second frequency range simultaneously; Step 104, in the time judging that described terminal is only supported described the first frequency range, guide described terminal to access the allocated channel in described the first frequency range, and in the time judging that described terminal is supported described the first frequency range and described the second frequency range, guide described terminal to access the allocated channel in described the second frequency range.
In this technical scheme, by whether support double frequency (supporting the first frequency range and the second frequency range) to judge to terminal simultaneously, making can be in the time that terminal be only supported the first frequency range, guiding terminal accesses the channel of the first frequency range, and in the time that terminal is supported the first frequency range and the second frequency range, can access the channel of the second frequency range by guiding terminal, and then can avoid terminal to increase the load of the first frequency range supporting also to access the first frequency range when double frequency, alleviate the pressure of the first frequency range.Particularly, the first frequency range can be 2.4GHz frequency range, and the second frequency range can be 5GHz frequency range.Wherein, above-mentioned wlan system can be by connecting multiple WLAN radio frequency unit compositions on WLAN chip, wherein each WLAN radio frequency unit can be operated in respectively the first frequency range (as 2.4GHz) or the second frequency range (as 5GHz), for the different WLAN radio frequency units that are operated in same frequency range, different channels can be set, each channel can access multiple terminals, therefore, than the scheme that need to increase multiple AP in correlation technique in the intensive place of terminal, the application's technical scheme is disposed simple, and can effectively reduce lower deployment cost.
Wherein, the hardware structure diagram of wlan system can be with reference to Fig. 2.
Fig. 2 shows the hardware configuration schematic diagram of wlan system according to an embodiment of the invention.
As shown in Figure 2, wlan system according to an embodiment of the invention, comprise: processing unit 202 (can be microprocessor), be connected with multiple base band with processing unit and (situation of 4 base band be shown in Fig. 2, be base band 204, base band 206, base band 208, base band 210), each base band has three transceivers, can certainly be multiple transceivers, each transceiver connects an antenna, forms aerial array.Wherein, each base band can be operated in 2.4GHz frequency range or 5GHz frequency range.The different combination of aerial array can form different radiation diagrams.The connected mode of processing unit 202 and each base band can adopt the mode of PCIE (PCI-Express, bus and interface standard).
Particularly, be the radiation diagram that four base band are combined into during with frequency range as shown in Figure 3A, if four base band are all operated in 5GHz frequency range, can use respectively 36,48,149,157 channels; If four base band are all operated in 2.4GHz frequency range, can use respectively 1,6,11,13 channels.
The radiation diagram that Fig. 3 B is combined into while being depicted as three base band with frequency range, if one of them is operated in 5GHz frequency range, other are operated in 2GHz frequency range, can use respectively 149,1,6,11 channels.
The radiation diagram that Fig. 3 C is combined into while being depicted as two base band with frequency range.
Wherein, four above-mentioned base band can be configured to identical SSID, to form an ESS.
In technique scheme, preferably, judge whether described terminal supports the step of described the first frequency range and described the second frequency range to be specially simultaneously: in the given time, only receive the broadcast probe request information that described terminal sends, do not send the echo message to described broadcast probe request information; If within the described scheduled time, receive that described terminal sends simultaneously for the broadcast probe request information of described the first frequency range with for the broadcast probe request information of described the second frequency range, judge that described terminal supports described the first frequency range and described the second frequency range, if and within the described scheduled time, only receive the broadcast probe request information for described the first frequency range that described terminal sends, judge that described terminal only supports described the first frequency range.
In this technical scheme, if do not respond the broadcast probe request information (being Probe Request message) of terminal, terminal can constantly send broadcast probe request information at different frequency range (supporting under the prerequisite of multifrequency), therefore can not respond in the given time the broadcast probe request information that terminal sends, to determine the frequency range at the broadcast probe request information place that receives terminal transmission, and then the frequency range of definite terminal support.Certainly, be 2.4GHz in the first frequency range, when the second frequency range is 5GHz, because terminal is all supported 2.4GHz frequency range substantially, therefore in order to alleviate the frequency range of 2.4GHz, can be in the time receiving the broadcast probe request information that terminal pins sends 2.4GHz frequency range, do not respond, and in the time receiving the broadcast probe request information that terminal pins sends 5GHz frequency range, directly respond (back message using is Probe Response message), directly access 5GHz frequency range with guiding terminal.
In technique scheme, preferably, also comprise: the signal strength signal intensity of the described broadcast probe request information sending on each channel of described each frequency range according to described terminal is determined the signal strength signal intensity of described each channel; Select the channel of signal strength signal intensity maximum in described the first frequency range as the allocated channel in described the first frequency range, and select the channel of signal strength signal intensity maximum in described the second frequency range as the allocated channel in described the second frequency range.
In this technical scheme, by selecting the channel of signal strength signal intensity maximum for terminal access, can guarantee that terminal has higher communication quality.In addition, because terminal can send broadcast probe request information at different channels, therefore signal strength signal intensity that can be by determining the broadcast probe request information receiving on each channel is (as RSSI, Received Signal Strength Indication, the signal strength signal intensity receiving instruction) determine the signal strength signal intensity of each channel.
In technique scheme, preferably, the step that guides described terminal to access the allocated channel in described the first frequency range is specially: when receiving while sending described broadcast probe request information on the allocated channel of described terminal in described the first frequency range, send echo message to described terminal; The step that guides described terminal to access the allocated channel in described the second frequency range is specially: when receiving while sending described broadcast probe request information on the allocated channel of described terminal in described the second frequency range, send echo message to described terminal.
In technique scheme, preferably, described each frequency range comprises multiple channels; Described terminal access method also comprises: the utilance that detects each channel in described multiple channel; When in described multiple channels, the difference of the utilance of any two channels is greater than predetermined threshold, other channels in described at least one channel of terminal access that in described any two channels of guiding access, the channel of utilance maximum and signal strength signal intensity are the strongest.
In this technical scheme, by in the time that the difference of utilance of determining any two channels is greater than predetermined threshold, channel and the strongest terminal of signal strength signal intensity of guiding access channel utilization maximum access other channels, can alleviate on the one hand the pressure of busy channel (being the channel that utilance is larger), the load of balanced multiple interchannels, the performance of elevator system and user experience; Also the communication quality that can avoid on the other hand the terminal a little less than signal strength signal intensity to access other channels and affect terminal.
Particularly, as shown in Figure 3 B, because terminal 310, terminal 312, terminal 314 and terminal 316 all access same channel, cause the busy of channel, therefore can kick the terminal 314 that signal is the strongest off, other channels of guiding terminal 314 access (channel that the channel accessing as terminal 302 and terminal 304 or terminal 306 and terminal 308 access), with the load between equalization channel.
Fig. 4 shows according to an embodiment of the invention the schematic block diagram for the terminal connecting system of wlan system.
As shown in Figure 4, according to an embodiment of the invention for the terminal connecting system 400 of wlan system, described wlan system can be operated in the first frequency range and the second frequency range, and each frequency range in described the first frequency range and described the second frequency range disposes at least one channel, described terminal connecting system 400, comprise: judging unit 402, for judge whether the terminal of network to be accessed supports described the first frequency range and described the second frequency range simultaneously; Processing unit 404, for in the time that described judging unit 402 judges that described terminal is only supported described the first frequency range, guide described terminal to access the allocated channel in described the first frequency range, and in the time that described judging unit 402 judges that described terminal is supported described the first frequency range and described the second frequency range, guide described terminal to access the allocated channel in described the second frequency range.
In this technical scheme, by whether support double frequency (supporting the first frequency range and the second frequency range) to judge to terminal simultaneously, making can be in the time that terminal be only supported the first frequency range, guiding terminal accesses the channel of the first frequency range, and in the time that terminal is supported the first frequency range and the second frequency range, can access the channel of the second frequency range by guiding terminal, and then can avoid terminal to increase the load of the first frequency range supporting also to access the first frequency range when double frequency, alleviate the pressure of the first frequency range.Particularly, the first frequency range can be 2.4GHz frequency range, and the second frequency range can be 5GHz frequency range.Wherein, above-mentioned wlan system can be by connecting multiple WLAN radio frequency unit compositions on WLAN chip, wherein each WLAN radio frequency unit can be operated in respectively the first frequency range (as 2.4GHz) or the second frequency range (as 5GHz), for the different WLAN radio frequency units that are operated in same frequency range, different channels can be set, each channel can access multiple terminals, therefore, than the scheme that need to increase multiple AP in correlation technique in the intensive place of terminal, the application's technical scheme is disposed simple, and can effectively reduce lower deployment cost.
In technique scheme, preferably, also comprise: interactive unit 406, in the given time, only receive the broadcast probe request information that described terminal sends, do not send the echo message to described broadcast probe request information; Described judging unit 402 specifically for, if within the described scheduled time, receive that described terminal sends simultaneously for the broadcast probe request information of described the first frequency range with for the broadcast probe request information of described the second frequency range, judge that described terminal supports described the first frequency range and described the second frequency range, if and within the described scheduled time, only receive the broadcast probe request information for described the first frequency range that described terminal sends, judge that described terminal only supports described the first frequency range.
In this technical scheme, if do not respond the broadcast probe request information of terminal, terminal can constantly send broadcast probe request information at different frequency range (supporting under the prerequisite of multifrequency), therefore can not respond in the given time the broadcast probe request information that terminal sends, to determine the frequency range at the broadcast probe request information place that receives terminal transmission, and then the frequency range of definite terminal support.Certainly, be 2.4GHz in the first frequency range, when the second frequency range is 5GHz, because terminal is all supported 2.4GHz frequency range substantially, therefore in order to alleviate the frequency range of 2.4GHz, can be in the time receiving the broadcast probe request information that terminal pins sends 2.4GHz frequency range, do not respond, and in the time receiving the broadcast probe request information that terminal pins sends 5GHz frequency range, directly respond, directly access 5GHz frequency range with guiding terminal.
In technique scheme, preferably, described processing unit 404 also for: the described broadcast probe request information sending on each channel of described each frequency range according to described terminal is determined the signal strength signal intensity of described each channel; Select the channel of signal strength signal intensity maximum in described the first frequency range as the allocated channel in described the first frequency range, and select the channel of signal strength signal intensity maximum in described the second frequency range as the allocated channel in described the second frequency range.
In this technical scheme, by selecting the channel of signal strength signal intensity maximum for terminal access, can guarantee that terminal has higher communication quality.In addition, because terminal can send broadcast probe request information at different channel, therefore can be by determine that the signal strength signal intensity of the broadcast probe request information receiving determines the signal strength signal intensity of each channel on each channel.
In technique scheme, preferably, described processing unit 404 specifically for: when receiving while sending described broadcast probe request information on the allocated channel of described terminal in described the first frequency range, send echo message to described terminal, to guide described terminal to access the allocated channel in described the first frequency range; And when receiving while sending described broadcast probe request information on the allocated channel of described terminal in described the second frequency range, send echo message to described terminal, to guide described terminal to access the allocated channel in described the second frequency range.
In technique scheme, preferably, described each frequency range comprises multiple channels; Described terminal connecting system 400 also comprises: detecting unit 408, for detection of the utilance of each channel in described multiple channels; Described processing unit 404 also for, when in the utilance of the described each channel detecting according to described detecting unit 408 is judged described multiple channels, the difference of the utilance of any two channels is greater than predetermined threshold, other channels in described at least one channel of terminal access that in described any two channels of guiding access, the channel of utilance maximum and signal strength signal intensity are the strongest.
In this technical scheme, by in the time that the difference of utilance of determining any two channels is greater than predetermined threshold, channel and the strongest terminal of signal strength signal intensity of guiding access channel utilization maximum access other channels, can alleviate on the one hand the pressure of busy channel (being the channel that utilance is larger), the load of balanced multiple interchannels, the performance of elevator system and user experience; Also the communication quality that can avoid on the other hand the terminal a little less than signal strength signal intensity to access other channels and affect terminal.
More than be described with reference to the accompanying drawings technical scheme of the present invention, consider in the wlan system of correlation technique proposition, multiple AP are operated in different wireless channels, by wired distributing system interconnection, in the higher occasion of Station density, need to dispose multiple AP, cost is higher, and deployment complexity., concentrate in expansion service, because multiple AP are operated on different channels, therefore load information can not carry out alternately, causing load balancing more difficult easily meanwhile.Therefore, the present invention proposes a kind of new terminal access scheme for wlan system, can alleviate the pressure of single frequency band and/or single channel, the load of balanced multiple frequency ranges and interchannel, be conducive to the performance of elevator system and user's experience, the cost of simultaneously can reduction system disposing.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (10)
1. for a terminal access method for wlan system, described wlan system can be operated in the first frequency range and the second frequency range, and each frequency range in described the first frequency range and described the second frequency range disposes at least one channel, it is characterized in that, comprising:
Whether the terminal that judges network to be accessed supports described the first frequency range and described the second frequency range simultaneously;
In the time judging that described terminal is only supported described the first frequency range, guide described terminal to access the allocated channel in described the first frequency range, and
In the time judging that described terminal is supported described the first frequency range and described the second frequency range, guide described terminal to access the allocated channel in described the second frequency range.
2. the terminal access method for wlan system according to claim 1, is characterized in that, judges whether described terminal supports the step of described the first frequency range and described the second frequency range to be specially simultaneously:
In the given time, only receive the broadcast probe request information that described terminal sends, do not send the echo message to described broadcast probe request information;
If within the described scheduled time, receive that described terminal sends simultaneously for the broadcast probe request information of described the first frequency range with for the broadcast probe request information of described the second frequency range, judge that described terminal supports described the first frequency range and described the second frequency range, and
If within the described scheduled time, only receive the broadcast probe request information for described the first frequency range that described terminal sends, judge that described terminal only supports described the first frequency range.
3. the terminal access method for wlan system according to claim 2, is characterized in that, also comprises:
The signal strength signal intensity of the described broadcast probe request information sending on each channel of described each frequency range according to described terminal is determined the signal strength signal intensity of described each channel;
Select the channel of signal strength signal intensity maximum in described the first frequency range as the allocated channel in described the first frequency range, and select the channel of signal strength signal intensity maximum in described the second frequency range as the allocated channel in described the second frequency range.
4. the terminal access method for wlan system according to claim 1, is characterized in that, the step that guides described terminal to access the allocated channel in described the first frequency range is specially:
When receiving while sending described broadcast probe request information on the allocated channel of described terminal in described the first frequency range, send echo message to described terminal;
The step that guides described terminal to access the allocated channel in described the second frequency range is specially:
When receiving while sending described broadcast probe request information on the allocated channel of described terminal in described the second frequency range, send echo message to described terminal.
5. according to the terminal access method for wlan system described in any one in claim 1 to 4, it is characterized in that, described each frequency range comprises multiple channels;
Described terminal access method also comprises:
Detect the utilance of each channel in described multiple channel;
When in described multiple channels, the difference of the utilance of any two channels is greater than predetermined threshold, other channels in described at least one channel of terminal access that in described any two channels of guiding access, the channel of utilance maximum and signal strength signal intensity are the strongest.
6. for a terminal connecting system for wlan system, described wlan system can be operated in the first frequency range and the second frequency range, and each frequency range in described the first frequency range and described the second frequency range disposes at least one channel, it is characterized in that, comprising:
Judging unit, for judge whether the terminal of network to be accessed supports described the first frequency range and described the second frequency range simultaneously;
Processing unit, in the time that described judging unit judges that described terminal is only supported described the first frequency range, guides described terminal to access the allocated channel in described the first frequency range, and
In the time that described judging unit judges that described terminal is supported described the first frequency range and described the second frequency range, guide described terminal to access the allocated channel in described the second frequency range.
7. the terminal connecting system for wlan system according to claim 6, is characterized in that, also comprises:
Interactive unit, in the given time, only receives the broadcast probe request information that described terminal sends, and does not send the echo message to described broadcast probe request information;
Described judging unit specifically for, if within the described scheduled time, receive that described terminal sends simultaneously for the broadcast probe request information of described the first frequency range with for the broadcast probe request information of described the second frequency range, judge that described terminal supports described the first frequency range and described the second frequency range, and
If within the described scheduled time, only receive the broadcast probe request information for described the first frequency range that described terminal sends, judge that described terminal only supports described the first frequency range.
8. the terminal connecting system for wlan system according to claim 7, is characterized in that, described processing unit also for:
The signal strength signal intensity of the described broadcast probe request information sending on each channel of described each frequency range according to described terminal is determined the signal strength signal intensity of described each channel;
Select the channel of signal strength signal intensity maximum in described the first frequency range as the allocated channel in described the first frequency range, and select the channel of signal strength signal intensity maximum in described the second frequency range as the allocated channel in described the second frequency range.
9. the terminal connecting system for wlan system according to claim 6, is characterized in that, described processing unit specifically for:
When receiving while sending described broadcast probe request information on the allocated channel of described terminal in described the first frequency range, send echo message to described terminal, to guide described terminal to access the allocated channel in described the first frequency range; And
When receiving while sending described broadcast probe request information on the allocated channel of described terminal in described the second frequency range, send echo message to described terminal, to guide described terminal to access the allocated channel in described the second frequency range.
10. according to the terminal connecting system for wlan system described in any one in claim 6 to 9, it is characterized in that, described each frequency range comprises multiple channels;
Described terminal connecting system also comprises:
Detecting unit, for detection of the utilance of each channel in described multiple channels;
Described processing unit also for, when in the utilance of the described each channel detecting according to described detecting unit is judged described multiple channels, the difference of the utilance of any two channels is greater than predetermined threshold, other channels in described at least one channel of terminal access that in described any two channels of guiding access, the channel of utilance maximum and signal strength signal intensity are the strongest.
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