CN101616420B - Method and device for dynamic monitoring and resource allocation - Google Patents
Method and device for dynamic monitoring and resource allocation Download PDFInfo
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- CN101616420B CN101616420B CN2009100902230A CN200910090223A CN101616420B CN 101616420 B CN101616420 B CN 101616420B CN 2009100902230 A CN2009100902230 A CN 2009100902230A CN 200910090223 A CN200910090223 A CN 200910090223A CN 101616420 B CN101616420 B CN 101616420B
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Abstract
The invention discloses a method and a device for dynamic monitoring and resource allocation. A wireless access point (AP) carries out real-time monitoring and analysis on a frequency band resource in the wireless data receiving and sending process and obtains monitoring and analyzing content; according to the monitoring and analyzing content, frequency band resource allocation is performed in the wireless data receiving and sending process. The invention also discloses a device for dynamic monitoring and resource allocation. Under the condition of continuing the current service, the invention can dynamically switch to a clean channel to ensure the normal operation of service; the invention also can automatically switch to an operation mode of dual frequency band in clean environment, which improves transmission quality and avoids resource idleness.
Description
Technical field
The present invention relates to the 802.11n wireless communication technology field, relate in particular to the method and apparatus of a kind of dynamic monitoring and resource allocation.
Background technology
WLAN (wireless local area network) utilizes electromagnetic wave to carry out transfer of data, has greatly improved the mobility of portable terminal, and at the relative cable network in aspects such as network layout bigger improvement is arranged all.But because aspect such as the not high and wireless coverage of radio throughput is limited is restricted based on the wireless network loaded service, this also is to impel wireless network protocol to be upgraded to 802.11a/g from 802.11b, is upgraded to the reason of present 802.11n again.
802.11n adopt multiple-input and multiple-output (MIMO, Multiple Input Multiple Output) and double frequency-band technology such as (40MHz) to improve wireless coverage and radio throughput, thereby promote the transmission quality of wireless network.Wherein, double frequency-band is meant two adjacent 20MHz bandwidth is bundled 40MHz communication bandwidth of composition, the bandwidth that can be used as two 20MHz when real work uses that (one wide as master tape, one is time bandwidth, both can be during transceive data with the bandwidth work of 40MHz, also can work with single 20MHz bandwidth), speed can be doubled like this.
Yet, at the 2.4GHz frequency band, because the restriction of resource, non-overlapped channel seldom, for example: under the 20MHz frequency band, have only 1,6,11 3 non-overlapped channel, if adopt the double frequency-band technology, then be easy to be subjected to the interference of wireless network on every side, thereby cause wrong bag to retransmit the appearance of great number of issues such as network delay.Therefore in existing 802.11n agreement, but the double frequency-band technology is a selecting technology under the 2.4GHz frequency band, and at present under the 2.4GHz frequency band, product all is operated under the single band pattern mostly.With respect to traditional 802.11a/b/g wireless network, the service quality of 802.11n wireless network increases, but when multi-service was carried out simultaneously, its service quality was still not as good as cable network.Particularly in the period of environment relative clean (noiseless or disturb little), equipment can't automatically switch to double frequency-band, can't rational allocation to resource, thus can cause resources idle.
Summary of the invention
In view of this, main purpose of the present invention is to provide the method and apparatus of a kind of dynamic monitoring and resource allocation, can't cause the problem of resources idle easily to the resource rational allocation to solve prior art.
For achieving the above object, technical scheme of the present invention is achieved in that
The invention provides the method for a kind of dynamic monitoring and resource allocation, this method comprises:
Wireless access point AP is monitored in real time and is analyzed band resource in the process of wireless data transceiving, and the content of being monitored and analyzing;
According to the content of described monitoring and analysis, carry out the allotment of band resource, be specially:
Be in the single band operation pattern if the wireless network of described AP is current, and have clean adjacent single band, then wireless network is switched to the double frequency-band mode of operation;
If the current double frequency-band mode of operation that is in of described wireless network, and one of them frequency band is busy, then described wireless network is switched to the single band operation pattern;
Be in the double frequency-band mode of operation if described wireless network is current, and two frequency bands are all busy, then when having clean adjacent channel, described wireless network moved to described clean adjacent channel.
Wherein, the content of described monitoring and analysis comprises: the situation of each wireless network band occupancy resource in the cochannel, and the occupation condition of adjacent channel.
This method further comprises: described AP monitors band resource in real time according to the information that the signal to noise ratio and the physical layer of message reports.
This method further comprises: if with described wireless network by after switching to the single band operation pattern, described single nearby frequency bands also is clean, then continues by described single band operation mode switch to the double frequency-band mode of operation.
Wireless network is moved to clean adjacent channel, is to realize by the operation that single band is switched and the double frequency-band switching combines.
The present invention also provides the device of a kind of dynamic monitoring and resource allocation, and this device comprises:
Radio receiving transmitting module is used to carry out wireless data transceiving;
The monitoring resource analysis module is used in the process of wireless data transceiving band resource being monitored in real time and being analyzed, and the content of being monitored and analyzing;
The resource allocation module is used for carrying out according to the content of described monitoring and analysis the allotment of band resource; Be further used for,, be in the single band operation pattern in that wireless network is current, and when having clean adjacent single band, described wireless network is switched to the double frequency-band mode of operation according to monitoring and the content analyzed; In the current double frequency-band mode of operation that is in of wireless network, and one of them frequency band switches to the single band operation pattern with described wireless network when busy; In the current double frequency-band mode of operation that is in of wireless network, two frequency bands are all busy, and when having clean adjacent channel, described wireless network moved to clean adjacent channel.
Wherein, the content of described monitoring and analysis comprises: the situation of each wireless network band occupancy resource in the cochannel, and the occupation condition of adjacent channel.
Described monitoring resource analysis module is further used for, and according to the information that the signal to noise ratio and the physical layer of message reports, band resource is monitored in real time.
Described resource allocation module is further used for, described wireless network is switched to the single band operation pattern after, if described single nearby frequency bands also is clean, then continue by described single band operation mode switch to the double frequency-band mode of operation.
Described resource allocation module is further used for, and realizes that by the operation that single band is switched and the double frequency-band switching combines wireless network arrives the migration of clean adjacent channel.
The method and apparatus of a kind of dynamic monitoring provided by the present invention and resource allocation is monitored in real time and is analyzed band resource in the process of wireless data transceiving by AP, and the content of being monitored and analyzing; According to the content of monitoring and analysis, carry out the allotment of band resource again.By the present invention, can under the situation of not interrupting current business, dynamically switch to clean channel, guarantee professional operate as normal; Can under the clean situation of environment, automatically switch into the double frequency-band mode of operation, thereby improve transmission quality, avoid causing resources idle.
Description of drawings
Fig. 1 is the schematic diagram of the wireless network under the applied environment of the present invention;
Fig. 2 is the schematic diagram of the bandwidth usage under the single band of the present invention;
Fig. 3 is the schematic diagram of the bandwidth usage under the double frequency-band of the present invention;
Fig. 4 is the flow chart of the method for dynamic monitoring of the present invention and resource allocation;
Fig. 5 is the apparatus structure schematic diagram of dynamic monitoring of the present invention and resource allocation;
The method flow schematic diagram that Fig. 6 handles for resource allocation of the present invention.
Embodiment
The technical solution of the present invention is further elaborated below in conjunction with the drawings and specific embodiments.
Core of the present invention is WAP (wireless access point) (AP, Access Point) in the process of wireless data transceiving, resource in the associated frequency band is monitored in real time and analyzed, and according to the content of monitoring and analyzing, carry out the reasonable switching and the allotment of band resource on suitable opportunity, reach the purpose that each wireless network can both guarantee stable transmission quality.
The wireless network that the present invention is suitable for as shown in Figure 1, a plurality of AP form a plurality of wireless networks, and have situation about interfering with each other between each wireless network, thereby, must pass through the operate as normal that the rational allocation band resource could guarantee each wireless network.
In addition, the AP among the present invention need support single band operation pattern and double frequency-band mode of operation, and the bandwidth usage of (20MHz) channel as shown in Figure 2 under the single band operation pattern; Under the double frequency-band mode of operation (40MHz), the bandwidth usage of channel as shown in Figure 3.Under the single band operation pattern, be reserved with certain bandwidth border for the interference that prevents adjacent channel, and under the double frequency-band mode of operation, the bandwidth of these reservations can be used for also communicating by letter.In addition, under the double frequency-band mode of operation of 40MHz, can be during transceive data with the bandwidth work of 40MHz, also can be with the bandwidth work of single 20MHz.
Generally, an AP after powering on, if be configured to the automatic channel preference pattern, then AP can automatic scan each channel, select the channel of relative clean (be noiseless or disturb little); But along with the increase of other wireless networks on every side, previous clean channel may no longer totally (promptly disturb and become greatly).Adopt the method and apparatus of dynamic monitoring of the present invention and resource allocation like this under the situation, can realize reasonable resources is allocated.
The method of a kind of dynamic monitoring provided by the present invention and resource allocation as shown in Figure 4, mainly may further comprise the steps:
AP monitors band resource in real time according to the signal to noise ratio of transmitting-receiving message and the information that physical layer reports, and monitoring and the content of analyzing comprise: the situation of each wireless network band occupancy resource in the cochannel, and the occupation condition of adjacent channel.
Band resource allotment operation comprises: from of the switching of single band operation pattern to the double frequency-band mode of operation, and from of the switching of double frequency-band mode of operation to the single band operation pattern, and the migration of channel.Concrete switching and migration operation will be described in detail in follow-up embodiment.
The device of dynamic monitoring provided by the present invention and resource allocation, as shown in Figure 5, this device is applied to comprise among the AP: radio receiving transmitting module 10, monitoring resource analysis module 20 and resource allocation module 30, wherein,
Radio receiving transmitting module 10 is used to carry out normal wireless data transceiving;
Monitoring resource analysis module 20 is used in the process of wireless data transceiving band resource being monitored in real time and being analyzed, and the content of being monitored and analyzing.Preferable, monitoring resource analysis module 20 is monitored band resource in real time according to the signal to noise ratio of radio receiving transmitting module 10 transmitting-receiving messages and the information that physical layer reports.
Resource allocation module 30 is used for carrying out according to the content of monitoring and analysis the allotment of band resource.Resource allocation module 30 need be carried out message interaction by radio receiving transmitting module 10 and portable terminal, to carry out handover negotiation optimization when carrying out the allotment of band resource.The allotment that resource allocation module 30 is carried out band resource according to the content of monitoring and analysis is operated, and is specially:
Be in the single band operation pattern if the wireless network of definite AP is current, and have clean adjacent single band, then wireless network is switched to the double frequency-band mode of operation;
If determine the current double frequency-band mode of operation that is in of wireless network of AP, and one of them frequency band is busy, then wireless network is switched to the single band operation pattern;
Be in the double frequency-band mode of operation if the wireless network of definite AP is current, and two frequency bands are all busy, then when having clean adjacent channel, wireless network moved to clean adjacent channel.
Preferable, after resource allocation module 30 switched to the single band operation pattern with wireless network, if this single nearby frequency bands also is clean, then resource allocation module 30 continued by the single band operation mode switch to the double frequency-band mode of operation.
Need to prove that monitoring and analysis that monitoring resource analysis module 20 is carried out mainly comprise following content: the situation of each wireless network band occupancy resource in the cochannel, and the occupation condition of adjacent channel.After the content that monitoring resource analysis module 20 will monitor and analyze offered resource allocation module 30, resource allocation module 30 can be abideed by following principle and carry out the flexible allotment of band resource:
Be in the single band operation pattern if the wireless network of AP is current, and have clean adjacent single band, then wireless network can be switched to the double frequency-band mode of operation;
If the current double frequency-band mode of operation that is in of the wireless network of AP, and one of them frequency band is busy, then wireless network can be switched to the single band operation pattern;
Be in the double frequency-band mode of operation if the wireless network of AP is current, and two frequency bands are all busy, then can when having clean adjacent channel, wireless network be moved to clean adjacent channel.
Below in conjunction with Fig. 6 resource allocation handling process of the present invention is elaborated, mainly may further comprise the steps:
The monitoring of monitoring resource analysis module transmission and the content of analysis are received in step 601～602, resource allocation module, and obtain the current mode of operation of AP, if be judged to be the single band operation pattern, then execution in step 603, if be judged to be the double frequency-band mode of operation, then execution in step 605.
Step 603, the situation of each wireless network band occupancy resource judges whether to exist clean nearby frequency bands in the cochannel that provides according to the monitoring resource analysis module, if there is no, does not then process; If exist, then execution in step 604.
Step 604 is carried out handover negotiation optimization with portable terminal by message interaction, and after consulting successfully, and this nearby frequency bands is carried out the expansion of frequency band as time bandwidth, promptly by the single band operation mode switch to the double frequency-band mode of operation.After handover operation was finished, this allocated end.
Step 605 according to the situation of each wireless network band occupancy resource in the cochannel, has judged whether frequency band busy (promptly be subjected to external interference or disturb bigger), if do not have, does not then process; If have, then execution in step 606.
Step 606 judges whether two frequency bands are all busy, if then execution in step 608; Otherwise, execution in step 607.
Step 607 is judged and is had only a frequency band busy, then carries out handover negotiation optimization with portable terminal by message interaction, and after consulting successfully, execution is promptly at first transferred to business clean frequency band to the switching of single band operation pattern, switches to clean single band operation again.
Preferable, if after switching to the single band operation pattern, the single nearby frequency bands that is switched to is also for clean, then this nearby frequency bands can be carried out the expansion of frequency band as time bandwidth, promptly carry out again once by the handover operation of single band operation pattern, to realize the change of channel to the double frequency-band mode of operation.After handover operation was finished, this allocated end.
Step 608, the occupation condition of the adjacent channel that provides according to the monitoring resource analysis module judges whether to exist clean adjacent channel, if there is no, does not then process; If exist, then execution in step 609.
Step 609 is carried out the migration to adjacent channel.
The migration of channel is to switch to the frequency band that another separates fully from a frequency band, and migration operation need be by the switching of single band to double frequency-band, and the comprehensive utilization that double frequency-band switches to single band could realize.Concrete comprehensive utilization mode can have multiple, for example: at first switch to single band operation pattern (be about to busy relatively single band business and switch to idle relatively single band) from the double frequency-band mode of operation, oppositely be expanded into double frequency-band from this single band then, and the like, to realize switching, promptly successfully finish migration after the finishing switching to adjacent channel from the single band operation pattern to the double frequency-band mode of operation.
The above is preferred embodiment of the present invention only, is not to be used to limit protection scope of the present invention.
Claims (10)
1. the method for dynamic monitoring and resource allocation is characterized in that this method comprises:
Wireless access point AP is monitored in real time and is analyzed band resource in the process of wireless data transceiving, and the content of being monitored and analyzing;
According to the content of described monitoring and analysis, carry out the allotment of band resource, be specially:
Be in the single band operation pattern if the wireless network of described AP is current, and have clean adjacent single band, then wireless network is switched to the double frequency-band mode of operation;
If the current double frequency-band mode of operation that is in of described wireless network, and one of them frequency band is busy, then described wireless network is switched to the single band operation pattern;
Be in the double frequency-band mode of operation if described wireless network is current, and two frequency bands are all busy, then when having clean adjacent channel, described wireless network moved to described clean adjacent channel.
2. according to the method for described dynamic monitoring of claim 1 and resource allocation, it is characterized in that the content of described monitoring and analysis comprises: the situation of each wireless network band occupancy resource in the cochannel, and the occupation condition of adjacent channel.
3. according to the method for claim 1 or 2 described dynamic monitorings and resource allocation, it is characterized in that this method further comprises: described AP monitors band resource in real time according to the information that the signal to noise ratio and the physical layer of message reports.
4. according to the method for claim 1 or 2 described dynamic monitorings and resource allocation, it is characterized in that, this method further comprises: if with described wireless network by after switching to the single band operation pattern, described single nearby frequency bands also is clean, then continues by described single band operation mode switch to the double frequency-band mode of operation.
5. according to the method for claim 1 or 2 described dynamic monitorings and resource allocation, it is characterized in that, wireless network is moved to clean adjacent channel, is to realize by the operation that single band is switched and the double frequency-band switching combines.
6. the device of dynamic monitoring and resource allocation, comprising: be used to carry out the radio receiving transmitting module of wireless data transceiving, it is characterized in that, this device also comprises:
The monitoring resource analysis module is used in the process of wireless data transceiving band resource being monitored in real time and being analyzed, and the content of being monitored and analyzing;
The resource allocation module is used for carrying out according to the content of described monitoring and analysis the allotment of band resource; Be further used for,, be in the single band operation pattern in that wireless network is current, and when having clean adjacent single band, described wireless network is switched to the double frequency-band mode of operation according to monitoring and the content analyzed; In the current double frequency-band mode of operation that is in of wireless network, and one of them frequency band switches to the single band operation pattern with described wireless network when busy; In the current double frequency-band mode of operation that is in of wireless network, two frequency bands are all busy, and when having clean adjacent channel, described wireless network moved to clean adjacent channel.
7. according to the device of described dynamic monitoring of claim 6 and resource allocation, it is characterized in that the content of described monitoring and analysis comprises: the situation of each wireless network band occupancy resource in the cochannel, and the occupation condition of adjacent channel.
8. according to the device of claim 6 or 7 described dynamic monitorings and resource allocation, it is characterized in that described monitoring resource analysis module is further used for,, band resource is monitored in real time according to the information that the signal to noise ratio and the physical layer of message reports.
9. according to the device of claim 6 or 7 described dynamic monitorings and resource allocation, it is characterized in that, described resource allocation module is further used for, after described wireless network switched to the single band operation pattern, if described single nearby frequency bands also is clean, then continue by described single band operation mode switch to the double frequency-band mode of operation.
10. according to the device of claim 6 or 7 described dynamic monitorings and resource allocation, it is characterized in that, described resource allocation module is further used for, and realizes that by the operation that single band is switched and the double frequency-band switching combines wireless network arrives the migration of clean adjacent channel.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US10075859B2 (en) | 2012-07-02 | 2018-09-11 | Thomson Licensing | Method for monitoring a wireless link of a Wi-Fi node of a customer premises equipment device, and customer premises equipment device utilizing the method |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102833756A (en) * | 2011-06-13 | 2012-12-19 | 普天信息技术研究院有限公司 | Method for transmitting data by single subband user in OFDM (orthogonal frequency division multiplexing) system |
| CN103974302A (en) * | 2013-01-25 | 2014-08-06 | 中航物联技术（北京）有限公司 | WSN wireless communication method and device with multi-carrier transfer function |
| CN103974303A (en) * | 2013-01-25 | 2014-08-06 | 中航物联技术（北京）有限公司 | Anti-interference method and device for automatic frequency conversion wireless sensor network (WSN) |
| CN103546911B (en) * | 2013-11-12 | 2016-04-20 | 上海交通大学 | The method of wireless access point selection optimum channel |
| CN110809300B (en) * | 2019-11-19 | 2024-03-22 | 上海商米科技集团股份有限公司 | WiFi channel switching method and wireless access point |
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| CN1262823A (en) * | 1998-03-25 | 2000-08-09 | 寇德史培斯公司 | Communication satellite system with dynamic downlink resource allocation |
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| US10075859B2 (en) | 2012-07-02 | 2018-09-11 | Thomson Licensing | Method for monitoring a wireless link of a Wi-Fi node of a customer premises equipment device, and customer premises equipment device utilizing the method |
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