CN109716819A

CN109716819A - A kind of channel control method and equipment

Info

Publication number: CN109716819A
Application number: CN201780056000.5A
Authority: CN
Inventors: 韩云博; 丁志明
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2016-12-19
Filing date: 2017-03-29
Publication date: 2019-05-03
Anticipated expiration: 2037-03-29
Also published as: CN109716819B; WO2018113127A1

Abstract

A kind of method and equipment of channel control, it includes N number of nonoverlapping subchannel under the broadband that first equipment uses, N number of subchannel is the channel of narrowband that wherein method, which is applied to the first equipment,；It include: that first equipment sends the switching channel massage for carrying the second subchannel and indicating to the second equipment in the first subchannel, the switching channel massage is sent in first subchannel, second subchannel is the new subchannel that first equipment is the second equipment distribution, for second equipment to be switched to second subchannel；First subchannel and second subchannel belong to N number of nonoverlapping subchannel, and different；First equipment receives the confirmation message for the switching channel massage that second equipment is sent in second subchannel, and the confirmation message confirms that second equipment has been switched to second subchannel for first equipment.It is adapted to the characteristic of WiFi IoT.

Description

A kind of channel control method and equipment

Technical field

The present invention relates to field of communication technology more particularly to a kind of channel control method and equipment.

Background technique

With WLAN (Wireless Local Area Network, WLAN) the evolution of standard, Electrical and Electronics Engineers Association (Institute of Electrical and Electronics Engineers at present, IEEE) 802.11 working groups are preparing with Internet of Things (Internet of Thing, IoT) based on scene and with traditional 802.11 (802.11 agreements of Legacy, such as 802.11b/a/g/n/ac) Wireless Fidelity (Wireless Fidelity, the WiFi) research on standard of agreement highly compatible and formulate work.The WiFi standard may complete in 802.11ax or individually project verification, but not yet confirms.This WiFi agreement based on IoT scene is referred to using more popular Wireless Fidelity Internet of Things (WiFi IoT) in the embodiment of the present invention.

In 802.11 traditional agreements, access point (Access Point, AP) can detect channel when starting, and the 20MHz channel for selecting an interference less is as primary 20MHz channel, interacting message between website (Station, STA) and AP will carry out on this channel.Above-mentioned 20MHz primary channels are once select, and AP will not be changed under normal circumstances.Since WiFi uses free frequency spectrum, the available resource of frequency range is than relatively limited.By taking China as an example, nonoverlapping 20MHz frequency spectrum only has 3 in 2.4GHz frequency range, the upper non-conterminous 20MHz frequency range of 5GHz has 4, therefore no matter which section frequency spectrum AP selects as 20MHz primary channels, it is easy to select the channel being overlapped completely or partially with periphery basic service set (Basic Service Set, BSS).

The core feature of WiFi IoT first is that transmitting narrowband message using narrowband (Narrow Band, NB).Another core feature of WiFi IoT is in some scenarios may be more with the associated narrowband IoT STA quantity of AP.However 802.11 traditional agreements are used, the characteristic of WiFi IoT can not be adapted to.

Summary of the invention

The technical problem to be solved by the embodiment of the invention is that a kind of channel control method and equipment are provided, to be adapted to the characteristic of WiFi IoT.

First aspect, the embodiment of the invention provides a kind of methods of channel control, applied to the first equipment, the bandwidth that first equipment supports broadband and narrowband to transmit as message, it include N number of nonoverlapping subchannel under the broadband that first equipment uses, N number of subchannel is the channel of narrowband；The described method includes:

First equipment sends the switching channel massage for carrying the second subchannel and indicating to the second equipment in the first subchannel, the switching channel massage is sent in first subchannel, second subchannel is the new subchannel that first equipment is the second equipment distribution, for second equipment to be switched to second subchannel；First subchannel and second subchannel belong to N number of nonoverlapping subchannel, and different；

First equipment receives the confirmation message for the switching channel massage that second equipment is sent in second subchannel, and the confirmation message confirms that second equipment has been switched to second subchannel for first equipment.

In the present embodiment, since N refers to the number of subchannel, N should be the integer more than or equal to 1；Broadband and narrowband are opposite concepts, have broader frequency range in the present embodiment broadband, narrowband is then with respect to narrower frequency range；For example, broadband can be 20MHz, perhaps wider narrowband then can be 2MHz or 5MHz etc.；In addition, the One equipment is the equipment for carrying out channel management, usually can be access device, such as: access point, base station etc.；Second equipment then can be terminal device, monitoring device etc.；Second equipment and the second subchannel are not intended to limit its quantity in the present embodiment, thus the second equipment may include 1 perhaps 1 or more the second subchannel of entity device be also possible to 1 or 1 or more subchannel；It can be understood that, if the second equipment only includes 1 entity device, if the second subchannel includes 1 sub-channels, it will refer to a fixed sub-channels to the entity device, then provide the permission that the entity device is selected from this multiple subchannel if it is multiple subchannels；If the second subchannel includes 1 or more subchannel, if the second subchannel includes 1 sub-channels, all entity devices that so the second equipment is included will be assigned same sub-channels, if the second subchannel includes 1 or more subchannel, all entity devices that the second equipment includes can be assigned to different subchannels.

The instruction of above-mentioned second channel is the information for informing the second equipment second channel, usually can be the mark or any other information that can indicate second channel of second channel.

In embodiments of the present invention, due to realizing distribution and switching to narrow band channel, therefore it can overcome in traditional 802.11 agreements and be scheduled only for broad-band channel, the problem of leading to problems such as the problem of being easy to appear sharp impacts, variations that cannot switch and channel resource deficiency etc., therefore the embodiment of the present invention is adapted to the characteristic of WiFi IoT.

In an optional implementation manner, the method also includes:

The switching channel massage establishes associated transmission in the process using first subchannel in first equipment and second equipment；

Alternatively, the switching channel massage is sent in the case where first equipment executes load balancing.

Load balancing refers to: in above-mentioned N number of subchannel, there is the associated equipment of subchannel to occur in unbalanced situation, it needs for the equipment in the subchannel for being associated with more equipment to be switched in the subchannel for being associated with less equipment, to realize the process of each subchannel association less equipment of quantitative difference.

The scheme of the embodiment of the present invention, can be applied to original allocation subchannel can be used for the load balancing in later period.

In an optional implementation manner, the broadband has 20MHz or 20MHz band above；The narrowband has 20MHz or less bandwidth.

In the present embodiment, above-mentioned N number of subchannel, i.e., N number of narrowband can be different, be also possible to it is identical, such as: be entirely the narrowband of 2MHz, be also possible to: 2MHz, 5MHz or other the case where coexisting.Broadband is most wide can how many, this depends on frequency spectrum resource and agreement provides, the embodiment of the present invention is not construed as limiting this.

In an optional implementation manner, before second equipment in the first subchannel sends and carries the switching channel massage that the second subchannel indicates, the method also includes:

First equipment is that second equipment distributes the second subchannel according to channel assignment strategy；

The channel assignment strategy include any one:

First equipment is at random that second equipment selects subchannel as second subchannel from N number of nonoverlapping subchannel；

Alternatively, first equipment from use selected in least subchannel wherein 1 sub-channels as second subchannel；

Alternatively, first equipment selected from the best subchannel of signal-to-noise ratio wherein 1 sub-channels as second subchannel.

In the present embodiment, the mode being randomly assigned is based on from the perspective of Probability, load balancing is eventually realized, suitable for initial subchannel distribution.By counting all entity devices using same sub-channels, then subchannel uses less that A possibility that indicating that the subchannel is more idle, colliding, is smaller, can move into entity device from other subchannels, and the entity device being newly added can also be assigned to the more idle subchannel；So as to adjusting in time, realizing load balancing and reducing collision.Subchannel is distributed according to the size of signal-to-noise ratio, then the movement or other reasons that can take into account equipment lead to the variation of communication between devices quality, by adjusting that can obtain preferable communication quality.

In an optional implementation manner, the method also includes:

Second subchannel is the subchannel in N number of nonoverlapping subchannel in M sub-channels, the set for the subchannel that grouping where the M sub-channels are second equipment uses.

In the present embodiment, the optional range of the second subchannel is limited first, is not arbitrarily to select in N number of subchannel, can provide condition for the grouping of equipment.

It is to be appreciated that M sub-channels are in N number of subchannel, therefore M is less than or equal to N, and in addition M is used to indicate the number of subchannel, therefore it should be greater than or equal to 1 integer.

In an optional implementation manner, the method also includes:

The M sub-channels and the intersection of sets collection of target subchannel are sky, and the collection of the target subchannel is combined into the set for having subchannel used in the grouping of overlapping region with the grouping where second equipment.

In the present embodiment, since M sub-channels and the intersection of sets collection of target subchannel are sky, grouping where so the second equipment and its have between the grouping of overlapping region will be there is no identical subchannel, then the collision of the equipment in different grouping will be limited in entirely acceptable range.

In the present embodiment, sets of sub-channels geographically has certain overlay area, then may have overlapping region between overlay area and overlay area；Therefore, the overlapping region of above-mentioned overlapping region instruction overlay area.

In an optional implementation manner, the grouping of second equipment includes:

It is according to the classification carried out according to the business of second equipment or geographical location.

In the present embodiment, it can be classified according to business or geographical location to equipment, by taking geographic Location Classification as an example: the geographical location can be the sector of the antenna transmitting of access device, a possibility that colliding between different sectors reduction will so be made using different sets of sub-channels between so different sectors, and be conducive to plan distribution of the subchannel in geographic area.

In an optional implementation manner, second equipment include 1 perhaps 1 or more entity device second subchannel include 1 or 1 or more subchannel.

In the aforementioned embodiment, it has been explained that the relationship between entity device quantity and number of sub-channels, details are not described herein.

In an optional implementation manner, the method also includes:

The switching channel massage is that single user switches channel massage, then for switching subchannel used in second equipment comprising 1 entity device；

Alternatively, the switching channel massage is that multi-user switches channel massage, then for switching subchannel used in second equipment comprising 1 or 1 or more entity device.

In the present embodiment, based on the relationship between the entity device quantity introduced above and number of sub-channels, the content that user switches channel massage can correspondingly be modified.

In an optional implementation manner, the method also includes:

Second device identification and corresponding with second device identification described are also carried in the switching channel massage Two subchannels, second equipment include 1 or more entity device.

In the present embodiment, the second equipment is based particularly on comprising in the case where multiple entity devices, the corresponding subchannel of designated identification can be more convenient to control the subchannel that specific equipment is switched to.

In an optional implementation manner, the method also includes:

The switching channel massage also carries the time instruction that second equipment sends the confirmation message of the switching channel massage, is used to indicate the time that second equipment sends the confirmation message of the switching channel massage；

Alternatively, the switching channel massage indicates that second equipment sends the confirmation message of the switching channel massage in the default time of first equipment.

In the present embodiment, the sending time of confirmation message is indicated by switching channel massage, the second equipment is enabled to obtain the time for accurately sending confirmation message, guarantee that confirmation message can be had correctly received by the first equipment.

Second aspect, the embodiment of the invention also provides a kind of channels to control equipment, applied to the first equipment, the bandwidth that first equipment supports broadband and narrowband to transmit as message, it include N number of nonoverlapping subchannel under the broadband that first equipment uses, N number of subchannel is the channel of narrowband；The channel controls equipment

Transmission unit, for sending the switching channel massage for carrying the second subchannel and indicating to the second equipment in the first subchannel, the switching channel massage is sent in first subchannel, second subchannel is the new subchannel that first equipment is the second equipment distribution, for second equipment to be switched to second subchannel；First subchannel and second subchannel belong to N number of nonoverlapping subchannel, and different；

Receiving unit, for receiving the confirmation message for the switching channel massage that second equipment is sent in second subchannel, the confirmation message confirms that second equipment has been switched to second subchannel for first equipment.

In an optional implementation manner,

The transmission unit, specifically for first equipment and second equipment established using first subchannel it is associated during send the switching channel massage；Alternatively, sending the switching channel massage in the case where first equipment executes load balancing.

In an optional implementation manner, the channel controls equipment further include:

Channel-assignment unit, for being that second equipment distributes the second subchannel according to channel assignment strategy；

The channel assignment strategy include any one:

It is at random that second equipment selects subchannel as second subchannel from N number of nonoverlapping subchannel；

Alternatively, from use selected in least subchannel wherein 1 sub-channels as second subchannel；

Alternatively, selected from the best subchannel of signal-to-noise ratio wherein 1 sub-channels as second subchannel.

In an optional implementation manner, second subchannel is the subchannel in N number of nonoverlapping subchannel in M sub-channels, the set for the subchannel that grouping where the M sub-channels are second equipment uses.

In an optional implementation manner, the M sub-channels and the intersection of sets collection of target subchannel are sky, and the collection of the target subchannel is combined into the set for having subchannel used in the grouping of overlapping region with the grouping where second equipment.

In an optional implementation manner, it is according to the classification carried out that the grouping of second equipment, which includes: according to the business of second equipment or geographical location,.

In an optional implementation manner, the switching channel massage is that single user switches channel massage, then for switching subchannel used in second equipment comprising 1 entity device；

In an optional implementation manner, second device identification and second subchannel corresponding with second device identification are also carried in the switching channel massage, second equipment includes 1 or more entity device.

In an optional implementation manner, the switching channel massage also carries the time instruction that second equipment sends the confirmation message of the switching channel massage, is used to indicate the time that second equipment sends the confirmation message of the switching channel massage；

The third aspect, the embodiment of the invention also provides the communication means of a kind of channel distribution and switching, are used for the first equipment, which comprises

First equipment at least supports the bandwidth for using 20MHz and 20MHz or less bandwidth to transmit as message；There is N number of nonoverlapping subchannel under the 20MHz bandwidth that first equipment uses, N number of subchannel is 20MHz with lower channel, and wherein N is positive integer；

First equipment grouping according to locating for one or more second equipment, switching channel massage is sent to one or more of second equipment in the first subchannel, the switching channel massage is sent in first subchannel, first equipment subchannel new according to the one or more that channel assignment strategy is the distribution of one or more of second equipment is carried, for one or more of second equipment to be switched to one or more of new subchannels；First subchannel is one in N number of nonoverlapping subchannel, and first subchannel and one or more of new subchannels are different channels；

First equipment receives the confirmation message for the switching channel massage that one or more of second equipment are sent respectively in one or more of new subchannels, has been switched to one or more of new subchannels to first equipment confirmation for one or more of second equipment；

The channel assignment strategy includes at least one of following:

First equipment is that one or more of second equipment select one or more subchannels as one or more of new subchannels from N number of nonoverlapping subchannel at random；

Select one or more subchannels as one or more of new subchannels or, first equipment is used from grouping locating for one or more of second equipment in least subchannel, each grouping uses at least one subchannel；

Or, first equipment selects one or more subchannels as one or more of new subchannels from the best subchannel of signal-to-noise ratio in grouping locating for one or more of second equipment.

In WiFi IoT scene, there may be multiple narrowband IoT channels available under the primary 20MHz channel of AP and use, how AP, which is narrowband IoT channel used in associated narrowband IoT STA is distributed, to have an impact the performance of WiFi system.By reasonable channel assignment strategy, it is able to ascend the performance of entire WiFi system.Additional, AP sends a switching channel massage to multiple narrowband IoT STA, these narrowbands IoT STA can be switched to identical or different new channel On, channel service efficiency is improved, air interface resource has been saved.

In an optional implementation manner, the method also includes:

First equipment described in the channel assignment strategy selects wherein M nonoverlapping subchannels in N number of nonoverlapping subchannel；First equipment selects one of one or more of new subchannels used as one or more of second equipment from the M nonoverlapping subchannels；Wherein M is the positive integer no more than N.

Assuming that AP can distribute one in N number of narrowband IoT channel as new channel for narrowband IoT STA, AP can select wherein M narrowband IoT channel to the STA in a certain grouping in N number of narrowband IoT channel, as the assignable new channel of STA in the grouping, M is the positive integer no more than N.Benefit is in two neighbor bss S, if the interference between two neighbor bss S can be effectively reduced using different narrowband IoT channels in neighbouring or overlapped coverage narrowband IoT STA on geographical location.

In an optional implementation manner, the method also includes:

The M nonoverlapping subchannels that one or more of second equipment in locating different grouping use are not exactly the same.

It is herein the mixed strategy in channel assignment strategy in the embodiment of the present invention, i.e. STA in different grouping can be assigned narrowband IoT channel can not be identical, increases the flexibility of channel assignment strategy.

In an optional implementation manner, the method also includes:

If first equipment sends the switching channel massage to one second equipment, the switching channel massage is that single user switches channel massage, for switching subchannel used in one second equipment；

If first equipment sends the switching channel massage to the multiple second equipment, the switching channel massage is that multi-user switches channel massage, for switching subchannel used in the multiple second equipment.

Single user switching channel massage is for switching narrowband IoT channel used in single narrowband IoT STA；Multi-user switches channel massage for switching narrowband IoT channel used in multiple narrowband IoT STA, and the narrowband IoT channel that multiple narrowband IoT STA are used originally here need to be identical, and the new narrowband IoT channel after switching may be the same or different.Same channel will be all switched to by comparing STA described in traditional 802.11 agreements, and multiuser channel handover request here is more flexible.

In an optional implementation manner, the method also includes:

The switching channel massage also carries the mark of one or more of second equipment, is used to indicate one or more of second equipment and needs to be switched to one or more of new subchannels.

When multiple narrowband IoT STA need to be switched to multiple new narrowband IoT channels, the identification information (such as MAC Address or AID) for needing to indicate the narrowband IoT STA in multi-user's switching channel massage, is used to indicate which new narrowband IoT channel which narrowband IoT STA will be switched on.

In an optional implementation manner, the method also includes:

The switching channel massage carries the time instruction that one or more of second equipment send the confirmation message of the switching channel massage, is used to indicate the confirmation message that one or more of second equipment send the switching channel massage in preset time.

In order to avoid colliding between the confirmation message of multiple narrowband IoT STA multi-user's switching channel massage replied, cause AP that can not determine which narrowband IoT STA has sent the confirmation message that the multi-user switches channel massage, AP can be added the multiple narrowband IoT STA in multi-user switching channel massage and send the preset time that the multi-user switches the confirmation message of channel massage, so which narrowband IoT STA successful switch AP can be confirmed to new channel.

In an optional implementation manner, the method also includes:

The switching channel massage indicates that one or more of second equipment send the confirmation message of the switching channel massage in the time with first equipment default agreement.

Narrowband IoT STA can be not need the instruction narrowband IoT STA in switching channel massage to send the time for switching the confirmation message of channel massage in the confirmation message of the time reply switching channel massage with AP default agreement, benefit, save expense.

Fourth aspect, the embodiment of the invention also provides the communication means of another channel distribution and switching, are used for the first equipment, which comprises

First equipment is associated with the second equipment using the foundation of the first subchannel, in establishing association process, first equipment grouping according to locating for second equipment, switching channel massage is sent to second equipment in the first subchannel, the switching channel massage is sent in the first subchannel, it is that second equipment distributes new subchannel that first equipment, which is carried, according to channel assignment strategy, for second equipment to be switched to the new subchannel；The new subchannel is one in N number of nonoverlapping subchannel, and first subchannel and the new subchannel are different channels；

First equipment receives the confirmation message for the switching channel massage that second equipment is sent in the new subchannel, has been switched to described one new subchannel to first equipment confirmation for second equipment；

The channel assignment strategy includes at least one of following:

First equipment is at random that second equipment selects a sub-channels as the new subchannel from N number of nonoverlapping subchannel；

Select a sub-channels as the new subchannel or, first equipment is used from grouping locating for second equipment in least subchannel, each grouping uses at least one subchannel；

Or, first equipment selects a sub-channels as new subchannel from the best subchannel of signal-to-noise ratio in grouping locating for second equipment.

In WiFi IoT scene, there may be multiple narrowband IoT channels available under the primary 20MHz channel of AP and use, how AP, which is narrowband IoT channel used in associated narrowband IoT STA is distributed, to have an impact the performance of WiFi system.By reasonable channel assignment strategy, it is able to ascend the performance of entire WiFi system.Additional, AP sends a switching channel massage to multiple narrowband IoT STA, can be switched to these narrowbands IoT STA on identical or different new channel, improve channel service efficiency, saved air interface resource.

In an optional implementation manner, the method also includes:

First equipment described in the channel assignment strategy selects wherein M nonoverlapping subchannels in N number of nonoverlapping subchannel；First equipment selects one of new subchannel used as second equipment from the M nonoverlapping subchannels；Wherein M is the positive integer no more than N.

In an optional implementation manner, the method also includes:

The M nonoverlapping subchannels that second equipment in locating different grouping uses are not exactly the same.

In an optional implementation manner, the method also includes:

The switching channel massage carries the time instruction that second equipment sends the confirmation message of the switching channel massage, is used to indicate the confirmation message that second equipment sends the switching channel massage in preset time.

In an optional implementation manner, the method also includes:

The switching channel massage indicates that second equipment sends the confirmation message of the switching channel massage in the time with first equipment default agreement.

5th aspect, the embodiment of the invention also provides a kind of first equipment, first equipment includes:

Transceiver at least supports the bandwidth for using 20MHz and 20MHz or less bandwidth to transmit as message；There is N number of nonoverlapping subchannel under the 20MHz bandwidth that the transceiver uses, N number of subchannel is 20MHz with lower channel, and wherein N is positive integer；Switching channel massage is sent to one or more of second equipment in the first subchannel for the first equipment, the switching channel massage is sent in first subchannel, first equipment subchannel new according to the one or more that channel assignment strategy is the distribution of one or more of second equipment is carried, for one or more of second equipment to be switched to one or more of new subchannels；

Transceiver, it is also used to the confirmation message that first equipment receives the switching channel massage that one or more of second equipment are sent in one or more of new subchannels, has been switched to one or more of new subchannels to first equipment confirmation for one or more of second equipment；

Processor, for generating the switching channel massage, and the confirmation message of the parsing switching channel massage；

Processor is also used to be that one or more of second equipment select one or more of new subchannels according to channel assignment strategy；The channel assignment strategy includes at least one of following:

Processor is that one or more of second equipment select one or more subchannels as one or more of new subchannels from N number of nonoverlapping subchannel at random；

Or, processor, uses in least subchannel from grouping locating for one or more of second equipment and select one or more subchannels as one or more of new subchannels, each grouping uses at least one subchannel；

Or, processor, select one or more as one or more of new subchannels in the subchannel best from signal-to-noise ratio in grouping locating for one or more of second equipment；

Memory, for storing program code and instruction；It is also used to store the channel assignment strategy；

Antenna, for the messaging from wireless medium.

In WiFi IoT scene, there may be multiple narrowband IoT channels available under the primary 20MHz channel of AP and make With how AP, which is narrowband IoT channel used in associated narrowband IoT STA is distributed, to have an impact the performance of WiFi system.By reasonable channel assignment strategy, it is able to ascend the performance of entire WiFi system.Additional, AP sends a switching channel massage to multiple narrowband IoT STA, can be switched to these narrowbands IoT STA on identical or different new channel, improve channel service efficiency, saved air interface resource.

In an optional implementation manner, the first equipment described in the channel assignment strategy selects wherein M nonoverlapping subchannels in N number of nonoverlapping subchannel；First equipment selects one of one or more of new subchannels used as one or more of second equipment from the M nonoverlapping subchannels；Wherein M is the positive integer no more than N.

In an optional implementation manner, it is not exactly the same that one or more of second equipment in locating different grouping use the M are not overlapped subchannel.

In an optional implementation manner, if first equipment sends the switching channel massage to one second equipment, the switching channel massage is that single user switches channel massage, for switching subchannel used in one second equipment；

In an optional implementation manner, the switching channel massage also carries the mark of one or more of second equipment, is used to indicate one or more of second equipment and needs to switch channel to one or more of new subchannels.

In an optional implementation manner, the switching channel massage also carries the time instruction that one or more of second equipment send the confirmation message of the switching channel massage, is used to indicate the confirmation message that one or more of second equipment send the switching channel massage in preset time.

In an optional implementation manner, the switching channel massage indicates that one or more of second equipment are that first equipment replys the confirmation message of the switching channel massage in the time of default agreement.

6th aspect, the embodiment of the invention also provides a kind of wireless telecom equipments, use as the first equipment, include: input-output equipment, processor and memory；Wherein memory may be used to provide processor and carry out caching or other data storage requirements required for data processing；Input-output equipment then provides the ability communicated between the access device and the second equipment；The processor for realizing the method flow of any one provided in an embodiment of the present invention control.

7th aspect, the embodiment of the invention also provides a kind of wireless telecom equipments, use as the first equipment, include: input-output equipment, processor and memory；Wherein, memory is stored with program instruction, which is used to realize the method flow of any one provided in an embodiment of the present invention during executing the program instruction.

Detailed description of the invention

To describe the technical solutions in the embodiments of the present invention more clearly, attached drawing needed in the embodiment of the present invention will be illustrated below.

Fig. 1 is the subchannel schematic diagram under Legacy equipment of embodiment of the present invention 20MHz；

Fig. 2 is the subchannel schematic diagram under Legacy equipment of embodiment of the present invention 20MHz；

Fig. 3 is the distribution schematic diagram of narrowband of embodiment of the present invention IoT channel；

Fig. 4 is the result schematic diagram that the embodiment of the present invention is randomly assigned after narrow band channel；

Fig. 5 is the result schematic diagram after distribution narrow band channel of the embodiment of the present invention；

Fig. 6 is distribution schematic diagram of the embodiment of the present invention by grouping distribution narrow band channel locating for STA；

Fig. 7 is the limitation selectable narrowband IoT channel distribution schematic diagram of STA of the embodiment of the present invention；

Fig. 8 is the selectable narrowband IoT channel distribution schematic diagram of limitation STA that the embodiment of the present invention combines grouping；

Fig. 9 is the narrowband IoT channel distribution signalling diagram of the single STA of the embodiment of the present invention；

Figure 10 is the narrowband IoT channel distribution signalling diagram of the single STA of the embodiment of the present invention；

Figure 11 is the narrowband IoT channel distribution signalling diagram of the single STA of the embodiment of the present invention；

Figure 12 is wireless communications device architecture schematic diagram of the embodiment of the present invention；

Figure 13 is channel of embodiment of the present invention control device structure schematic diagram；

Figure 14 is channel of embodiment of the present invention control device structure schematic diagram；

Figure 15 is the first device structure schematic diagram of the embodiment of the present invention；

Figure 16 is wireless communications device architecture schematic diagram of the embodiment of the present invention.

Specific embodiment

The embodiment of the present invention is described with reference to the attached drawing in the embodiment of the present invention.

The core feature of WiFi IoT first is that using narrowband (Narrow Band, NB) narrowband message is transmitted, such as using 1MHz, 2MHz or 5MHz as basic bandwidth, and narrowband IoT equipment and traditional (legacy) equipment may use same section of frequency spectrum.

It is above-mentioned it is defeated it is narrow be compared to traditional WLAN support 802.11 use 20MHz as basis bandwidth for；Narrowband IoT Equipment refers to using narrow band transmission and the equipment based on IoT scene；Legacy equipment refers to 802.11 equipment of tradition using 20MHz and band above；Above-mentioned same section of frequency spectrum can be such as: 2.4GHz, 5GHz etc..

In WiFi IoT scene, it is contemplated that the factors such as demand, cost, access point (Access Point, AP) side apparatus are likely to that 20MHz and narrowband IoT is supported to transmit simultaneously.In the embodiment of the present invention, further part will refer to such equipment using the narrowband Legacy+ IoT AP.As shown in Figure 1, it is dashed rectangle that the 20MHz primary channels of the narrowband Legacy+ IoT AP, which occupy frequency spectrum, N number of narrowband IoT channel can be subdivided into.IoT channel in narrowband is alternatively referred to as subchannel herein, such as solid line rectangular area；Assuming that narrowband IoT channel width is 2MHz, a kind of possible subdivision mode is that 20MHz primary channels are divided into 9 2MHz narrow band channels, i.e. remaining frequency spectrum is then as protection bandwidth in N=9,20MHz.

Above-mentioned 20MHz primary channels refer to that Legacy equipment listens to WiFi signal and defaults the 20MHz channel used.It should be noted that the bandwidth of aforementioned N number of narrowband IoT channel can be identical, it can also be not all the same.Website (Station, STA) then can only support narrowband IoT to transmit or support simultaneously 20MHz and narrowband IoT to transmit.The bandwidth of aforementioned N number of narrowband IoT channel can be identical situation, such as be all 2MHz channel；The bandwidth of aforementioned N number of narrowband IoT channel can be not all the same situation, such as 4 2MHz channels, 2 5MHz channels etc..Above-mentioned STA can refer to all STA for supporting 802.11 agreements in embodiments of the present invention, STA, i.e. legacy STA including supporting traditional 802.11 agreements；And support the STA, i.e. narrowband IoT STA of narrowband IoT transmission.If only supporting narrowband IoT transmission, it is properly termed as narrowband IoT STA；If 20MHz and narrowband IoT is supported to transmit simultaneously, it is properly termed as the narrowband legacy+ IoT STA.It should be noted that the cost that STA supports 20MHz and narrowband IoT to transmit simultaneously is transmitted much larger than only support narrowband IoT, therefore inexpensive demand is likely to narrowband IoT is only supported to transmit than stronger WiFi IoT STA.

Another core feature of WiFi IoT is in some scenarios may be more with the associated narrowband IoT STA quantity of AP.It such as copies ammeter and copies in water meter scene, a building or entire cell may thousand narrowband IoT STA of incidence number at same AP.Above-mentioned association refers to that basic service set (Basic Service Set, BSS) locating for AP is added in STA, and STA could carry out messaging with AP after being only added to BSS.The problems such as in such scene, since cell coverage area is wider, the STA in opposite direction may not receive mutual signal, while number of nodes is numerous, competition conflict may be very prominent.Above-mentioned competition conflict refers to that multiple STA may send WiFi message simultaneously, and leads to the case where interfering with each other each other.Therefore there is the mechanism of similar group's departmentalization operation (Group Sectorization Operation) in this kind of agreement, its core concept is that entire BSS is divided into several region (referred to as sectors, or grouping), AP is directed at each sector using directional aerial timesharing in turn.When AP is directed at a certain sector by directional aerial, the STA in the sector can be transmitted, and the STA in other sectors enters suspend mode.That is, the STA quantity that can be communicated with AP in multiplexing limitation sometime of the above-mentioned mechanism by space and time.

In current 802.11 agreement (such as 802.11b/a/g/n/ac), an AP only selects a 20MHz primary channels on one section of frequency spectrum (such as 2.4GHz or 5GHz), and all STA being associated carry out the transmission of message on this channel.However in WiFi IoT scene, support there are multiple available narrowband IoT channels under the 20MHz primary channels of the AP of the narrowband legacy+ IoT, if only choosing the primary channels that one of narrowband IoT channel is transmitted as narrowband IoT equipment (such as narrowband IoT STA), then other narrowbands IoT channel on the one hand under the 20MHz can be wasted, on the other hand since above-mentioned narrowband IoT STA is with same channel (such as same narrowband IoT channel, i.e. same subchannel), therefore (collision) is collided between STA may more acutely.Above-mentioned collision refers to two equipment while sending message, as a result causes the situation for both sending failure, it is assumed that each equipment transmission message probability is identical, then the probability to collide between STA is bigger when STA quantity associated in same channel is more.As illustrated in fig. 2, it is assumed that N number of narrowband IoT letter can be divided under 20MHz primary channels Road, if primary narrowband IoT channel of only one narrowband IoT channel as narrowband IoT equipment, the resource of remaining N-1 narrowband IoT channel will be wasted, while all narrowband IoT equipment will focus on primary narrowband IoT channel.Therefore providing a kind of possible design scheme in embodiments of the present invention be to support to distribute Arbitrary Narrow band IoT channel under its 20MHz primary channels by the AP of the narrowband legacy+ IoT that, to narrowband IoT STA as its primary narrowband IoT channel, primary narrowband IoT channel of the different narrow with IoT STA can difference.

From described above it is found that traditional 802.11 agreement can not be adapted to WiFi IoT application scenarios, at least show following aspects:

1, in traditional 802.11 agreements, AP selects one currently to interfere lesser channel as 20MHz primary channels in current each optional channel, does not account for the service condition of channel in longer period.

It 2, may be more huge with the associated narrowband IoT STA quantity of AP in WiFi IoT scene, simultaneously because AP can be listened to multiple narrowband IoT channels (under same 20MHz primary channels) simultaneously, more passively channel selective mode is less applicable in WiFi IoT scene in existing protocol.

3, traditional 802.11 agreements do not account for influence of the selection of each narrowband STA IoT channel after being grouped STA to system performance.

4, for AP once selecting a 20MHz primary channels, associated STA carries out the transmission of message in above-mentioned 20MHz primary channels in traditional 802.11 agreements.But there is a plurality of available narrowband IoT channel in WiFi IoT scene, therefore AP needs corresponding mechanism and different STA is made to be dispatched to different narrowband IoT channels.

Based on known to foregoing description, in traditional 802.11 agreements with the associated STA of AP in the same 20MHz primary channels, and the narrowband Legacy+ IoT AP can listen to its 20MHz primary channels and the multiple narrowband IoT channels Chong Die with the frequency range simultaneously in WiFi IoT scene.If a primary narrowband IoT channel as narrowband IoT transmission in above-mentioned multiple narrowband IoT channels is used only in above-mentioned AP, the transmission of message is carried out using the above-mentioned same primary narrowband IoT channel with the associated all narrowband IoT equipment of the AP, then other narrowbands IoT channel under the 20MHz channel is not used by, and causes the waste of resource.The embodiment of the present invention will be different narrow with IoT equipment distribution ability of the different narrow with IoT channel by assigning AP, in WiFi IoT scene, especially AP is associated in the scene of a large amount of STA, improve the collision situation (collision) of each narrowband IoT channel by narrowband IoT channel assignment strategy, and reduce interference between this BSS and Overlapping Basic Service Set (Overlapping Service Set, OBSS).Above-mentioned OBSS refers to this BSS using same channel, there is overlapping covered neighbor bss S.

The scheme application scenarios of the embodiment of the present invention are summarized as follows:

How different STA is assigned on different narrow band IoT channel by AP in the more narrowband IoT STA scenes of WiFi IoT.

The narrowband Legacy+ IoT AP in this specification can support the transmission that message is carried out using 20MHz and 20MHz or less bandwidth；It can also further support the transmission that message is carried out using 20MHz or more (such as 40MHz, 80MHz, 160MHz) bandwidth.

The communication that the embodiment of the present invention one is related to AP and its is associated between STA.

In this specification, if not otherwise specified, AP refers to the narrowband Legacy+ IoT AP in subsequent content, and STA refers to narrowband IoT STA, therefore subsequent embodiment will no longer repeat this one by one.In subsequent embodiment, AP corresponds to the first equipment in previous embodiment, and STA corresponds to the second equipment in previous embodiment.

The plan explanation of the embodiment of the present invention includes following aspects:

1, the STA that AP is this BSS safeguards narrowband IoT channel selection list (Narrow Band IoT Channel Selection Table)。

2, AP and STA establishes the associated stage, is that STA distributes suitable narrowband IoT channel according to narrow band channel IoT selective listing and channel assignment strategy.

It 3, is that STA adjusts suitable narrowband IoT channel according to narrow band channel IoT selective listing and channel assignment strategy after AP is associated with STA.

Following embodiment will be described in detail with regard to three above part respectively, as follows:

One, the STA that AP is this BSS safeguards narrowband IoT channel selection list.

In the portion, AP needs to record IoT channel in narrowband used in the STA in BSS.

A kind of possible recording mode is AP maintenance narrowband IoT channel selection list, and narrowband IoT channel selection list is for recording and narrowband IoT channel used in the associated STA of the AP.

1, a kind of recording mode of possible narrowband IoT channel selection list is as shown in table 1, longitudinal is the mark of different STA, it can be complete or brief mark, such as media access control (Medium Access Control, MAC) address, connection identification code (Association Identifier, AID) etc.；It is laterally the occupied narrowband IoT channel of the STA (being such as 1 to N by narrowband IoT channel number, N is the sum that the AP can use narrowband IoT channel).Wherein MAC Address is the unique mark of wireless telecom equipment, and length is 48 bits (bit)；AID (Association Identifier) is the brief mark distributed from AP to above-mentioned STA after AP and STA are established and be associated with.

A kind of possible narrowband IoT channel selection list of table 1

STA ID	Occupy the number (1,2,3..., N) of narrowband IoT channel
STA 1	1
STA 2	3
STA 3	4
...	...
STA i	3

2, optionally, AP obtains on each narrowband IoT channel the distribution of associated STA quantity by above-mentioned narrowband IoT channel selection list, judges that different narrow collides the probability size of (collision) with STA on IoT channel for AP.If STA quantity variance is larger between different narrow band IoT channel, STA is distributed the probability to collide between STA on more narrowband IoT channel may be larger.

Two, AP and STA establishes the associated stage, distributes suitable narrowband IoT channel according to narrowband IoT channel information (such as narrowband IoT channel selection list) and channel assignment strategy that associated STA is used is established with AP for STA.Above-mentioned channel assignment strategy will be in the present embodiment further part introduction.

1, a kind of AP establishes the process for distributing primary narrowband IoT channel when being associated with for above-mentioned STA with STA, shown in Fig. 3, comprising:

Firstly, STA1 (for STA) (sends association request message (Association Request Frame to AP on such as narrowband IoT channel m) in the narrowband IoT channel of default；AP it sends associate response message (Association Response Frame) on same narrowband IoT channel) to reply STA1, establishes association for confirming.

Then, AP is newly to establish associated STA1 to select a suitable narrowband IoT channel (such as narrowband IoT channel l), and the transmission switching channel massage on narrowband IoT channel m according to narrowband IoT channel selection list and channel assignment strategy.Above-mentioned switching channel massage at least indicates the new narrowband IoT channel that STA will be used, such as narrowband IoT channel l；Optionally, it also can indicate that when carry out channel switching, as STA is switched to new narrowband IoT after receiving above-mentioned switching channel massage 100ms again Channel.

Finally, STA1 receives above-mentioned switching channel massage and completes channel switching, confirmation message expression is sent to AP on new narrowband IoT channel l, channel switching is completed.

It should be noted that, if AP planned assignment is to the narrowband IoT channel of STA1, (such as narrowband IoT channel l) and STA1 send the narrowband IoT channel of above-mentioned association request, and (such as narrowband IoT channel m) is identical, and AP switches the channel of ST1A no need to send switching channel massage；Naturally, STA, which also has confirmed that no need to send confirmation message, receives switching channel massage.

2, a kind of possible AP is that the signalling interactive process of STA distribution narrowband IoT channel is as follows:

The association request message that 2A, STA are sent on narrowband IoT channel m (CH m, Narrow band channel m) to AP, request are associated with AP.

Above-mentioned narrowband IoT channel m defaults the narrowband IoT channel used when can be associated with by AP with STA foundation.For example, there is a plurality of narrowband IoT channel under the 20MHz primary channels that AP is used, AP selects to default the narrowband IoT channel used when wherein a narrowband IoT channel m is associated as AP and STA；Or, there is a plurality of narrowband IoT channel under the 20MHz primary channels that AP is used, AP can be associated on a plurality of narrowband IoT channel of above-mentioned all or part (more than one) with STA, and above-mentioned narrowband IoT channel m is one in above-mentioned all or part of a plurality of narrowband IoT channel.

2B, AP receive STA association request message transmitted on narrowband IoT channel m, and reply associate response message to above-mentioned STA, for acknowledging receipt of above-mentioned association request message.

2C, AP are that the STA selects suitable narrowband IoT channel according to the STA narrowband IoT channel information (such as narrow band channel IoT selective listing) used and channel assignment strategy, the narrowband IoT channel as subsequent message transmission.If narrowband IoT channel is different from the currently used narrowband IoT channel m of above-mentioned STA, AP sends switching channel massage to switch IoT channel in narrowband used in STA to the STA.Above-mentioned switching channel massage at least indicates the new narrowband IoT channel that above-mentioned STA will be used；Optionally, it also can indicate that when carry out channel switching.

It in embodiments of the present invention, the use of the purpose of above-mentioned channel assignment strategy is in order to which new associated STA to be assigned on some narrowband IoT channel, so that the performance of WiFi system at least in a certain respect is likely to be obtained promotion.The performance of above-mentioned WiFi system includes but is not limited to the collision probability between STA, signal-to-noise ratio (Signal to Noise Ratio on narrowband IoT channel, SNR), Signal to Interference plus Noise Ratio (Signal to Interference plus Noise Ratio, SINR) etc..

Above-mentioned SNR refers to the ratio of available signal power and noise power, and above-mentioned SINR refers to that the ratio of available signal power and interference signal plus noise power, the two ratio are the bigger the better, and illustrates the useful signal better quality that receiving end receives.Above-mentioned SNR and SINR is influenced by radio transmission medium.

Possible channel assignment strategy includes one or more of following channel assignment strategy:

1. being randomly assigned.

As AP selects a channel distribution to STA at random in N number of optional narrowband IoT channel.This channel assignment strategy benefit is simply, to be evenly distributed on different narrowband IoT channels based on STA final for probability angle.But the STA quantity variance associated by may cause on each narrowband IoT channel is larger, so that collision probability is larger between STA on certain narrowband IoT channels, adversely affects to WiFi system performance.As shown in figure 4, associated STA quantity is more on narrowband IoT channel CH2 and CH N-1 for using after the above-mentioned channel assignment strategy being randomly assigned, it is higher to will lead to collision probability between the STA using above-mentioned two narrowband IoT channel.

2., the STA quantity according to associated by each narrowband IoT channel, select the narrowband IoT channel distribution of an association STA minimum number to above-mentioned STA.

It is associated with the information of STA quantity on each channel as AP is obtained according to narrow band channel IoT selective listing, selects the narrowband IoT channel distribution of an association STA minimum number to above-mentioned STA.If there is multiple association STA quantity are least channel, then randomly choose one of those and distribute to above-mentioned new associated STA.This channel assignment strategy benefit is to be associated with STA quantity on each narrowband IoT channel to be in admirable proportion, and each channel collision probability is not significantly different.The disadvantage is that AP needs to obtain the statistical information of narrowband IoT channels associated STA, it is slightly increased the calculation amount of AP.As shown in figure 5, being associated on each narrowband IoT channel, STA quantity is more balanced, therefore the possible difference of the collision probability between STA of the different narrow with IoT channel is little.

3., according to the SNR or SINR of narrowband IoT channel when association, give above-mentioned STA to distribute narrowband IoT channel SNR or SINR best at this time.

When being associated such as AP and STA, AP distributes narrowband IoT channel SNR or SINR best at this time to above-mentioned STA.Benefit is that STA may will be got well in the quality of narrowband IoT channel message compared with using other narrowbands IoT channel in the short time after being associated with, but consider from a longer time scale, since the radio transmission medium of each narrowband IoT channel may change, front or negative impact are generated to the transmission of wireless signal, whether above-mentioned narrowband IoT channel is still the best narrowband IoT channel of SNR or SINR after being difficult an estimated longer time scale.That is, AP to the narrowband IoT channel that STA is distributed may no longer be the best channel of SNR or SINR over time when association.

4., narrowband IoT channel is distributed according to the grouping of STA.

Above-mentioned grouping refers to that the STA of this BSS is divided into group according to certain characteristics of STA by AP, such as business, the geographical location factor according to STA have been divided into several groupings.

As shown in Figure 6, a kind of possible allocation strategy example are as follows: AP is grouped into above-mentioned STA distribution narrowband IoT channel according to locating for STA, for example all STA in a certain grouping use identical narrowband IoT channel, different narrowband IoT channels can be used (such as in STA between different grouping, all STA use narrowband IoT channel CH1 in sector 1, and all STA use narrowband IoT channel CH2 in sector 2).

5., limitation the selectable narrowband IoT channel of STA.

Such as: AP chooses A narrowband IoT channel from N number of available narrowband IoT channel, it is promising it is new association STA distribution narrowband IoT channel chosen from this A channel.That is, will be concentrated on above-mentioned A narrowband IoT channel with narrowband IoT channel workable for the associated all STA of AP.Above-mentioned A narrowband IoT channel can be chosen from the A the smallest narrowband IoT channel of interference after actuation by AP.Benefit is if Overlapping Basic Service Set (Overlapping Basic Service Set, OBSS) AP also takes similar strategy, that is OBSS AP chooses B narrowband IoT channel in N number of available narrowband IoT channel, as the alternative narrowband IoT channel for distributing to OBSS STA.If two groups of narrowband IoT channels of above-mentioned A, B are not overlapped completely or only partly overlap, the interference of STA will be effectively reduced that (STA of i.e. two BSS is not on the same narrowband IoT channel between so two BSS, significant interference will not be generated between each other), and then WiFi system efficiency can be promoted.Above-mentioned OBSS refers to the neighbor bss S to overlap with the overlay area this BSS.

As shown in fig. 7, OBSS, the associated STA of AP1 can choose one from A narrowband IoT channel and be used as primary narrowband IoT channel, such as CH1 or CH3 or CH5 two BSS where AP1 and AP2 each other.It is assumed that STA1 is associated with AP1.And the associated STA of AP2 can choose one from B narrowband IoT channel and be used as primary narrowband IoT channel, such as CH2 or CH4 or CH6.Here STA2 is associated with AP2.In this scenario, even if STA1 and STA2 are in the overlapping region of AP1 and AP2 coverage area, but since above-mentioned STA1 and STA2 uses different narrowband IoT channels, STA1 and STA2 will not generate significant interference between each other.

6., using mixed strategy, i.e., simultaneously using two or more in above-mentioned channel strategy.

Such as: STA optional narrowband IoT channel is limited while STA is grouped.A kind of possible allocation strategy is that AP is grouped into STA according to locating for STA and distributes optional narrowband IoT channel, that is narrowband IoT channel used in STA AP all from the narrowband IoT channel that selection A (A is greater than or equal to 1) a narrowband IoT channel can be assigned as the STA in a certain grouping in N number of available narrowband IoT channel, the grouping is chosen from this A narrowband IoT channel.As shown in figure 8, its coverage area is divided into several sectors (such as L sector) according to geographical location by AP, and the STA in a certain sector is a grouping in the IoT scene (such as copying water meter, ammeter) for needing to be associated with a large amount of STA.Such as, narrowband IoT channel CH1 or CH3 can be used in the STA grouping in sector 1, and narrowband IoT channel CH2 or CH N-1, etc. can be used in the STA grouping in sector 3.Benefit is that the STA of a certain sector is concentrated use in one or more narrowband IoT channels, if the interference in above-mentioned two neighbor bss S between STA can be effectively reduced using different narrow band IoT channel with the STA of all or part of be overlapped other BSS of the sector coverage area.

2D, STA receive AP transmission switching channel massage, agreement time-switching to new narrowband IoT channel, and on new narrowband IoT channel to AP send switch channel massage confirmation message, for illustrating its successful switch channel.

The time of above-mentioned agreement refers to time (as immediately or after 50ms or after 100ms) switching channel after STA receives the switching channel massage of AP transmission in default, or switches over channel according to the time indicated in switching channel.

Three, after AP is associated with STA, AP can change IoT channel in narrowband used in single or multiple STA.

Need to adjust the scene of narrowband IoT channel for only one STA, AP can send single user switching channel massage to adjust IoT channel in narrowband used in above-mentioned STA, until a new narrowband IoT channel on the narrowband IoT channel that above-mentioned STA is used；For the scene for thering are multiple STA to need to adjust channel on same narrowband IoT channel, AP can send at least one multi-user and switch channel massage to adjust narrowband IoT channel used in above-mentioned multiple STA, new narrowband IoT channel used in above-mentioned multiple STA, it can be the same new narrowband IoT channel, or different new narrowband IoT channels；Optionally, AP can send broadcast switching channel massage, the narrowband IoT channel used for switching all STA on some narrowband IoT channel.

Alternatively possible AP is the signalling interactive process that STA switches narrowband IoT channel, and AP sends switching channel massage to the STA for needing to change channel, will discuss in two kinds of situation below:

A, AP changes the narrowband IoT channel that single STA is used.

1., AP sent on the narrowband IoT channel used in above-mentioned STA single user switching channel massage, indicate the new narrowband IoT channel that above-mentioned STA will be used；Optionally, it also can indicate that above-mentioned STA switches over the time of narrowband IoT channel.

2., as shown in figure 9, giving after a kind of AP is associated with STA, AP passes through single user and switches the process that channel massage changes the primary narrowband IoT channel of above-mentioned STA (such as STA1).AP sends single user to STA1 on the narrowband IoT channel m that STA1 is used and switches channel massage, and instruction STA1 needs to be switched to narrowband IoT channel l.STA1 is switched to above-mentioned narrowband IoT channel l in preset time, and sends the confirmation message (such as ACK, Acknowledge) of single user switching channel to AP on above-mentioned narrowband IoT channel l, for confirming that STA1 has successfully switched to new narrowband IoT channel.The time that above-mentioned preset time can be the time (time as specified in 802.11 agreements or AP/STA1 produce the rear preset time) that AP and STA1 are appointed in advance or indicate in above-mentioned single user switching channel massage.

Optionally, there are also other STA (such as STA2) to need to switch narrowband IoT channel, and AP continues to send single user switching channel massage to STA2, for STA2 to be switched to narrowband IoT channel k from narrowband IoT channel m.If should be noted that STA1 sends (IoT channel (such as narrowband IoT letter in narrowband used in the single user switching channel massage sent such as narrowband IoT channel l) and AP to STA2 of channel used in the confirmation message (such as ACK) of single user switching channel massage Road m) is different, then AP can without waiting for receiving the confirmation message of the above-mentioned single user switching channel of STA1 transmission, can send single user to STA2 and switch channel massage.

B, AP changes the channel of multiple STA on same narrowband IoT channel simultaneously.

1., AP narrowband IoT channel used in above-mentioned multiple STA send multi-user and switch channel massage, the new narrowband IoT channel that the mark and above-mentioned multiple STA for carrying above-mentioned multiple STA will use；Optionally, it also can indicate that the time of above-mentioned multiple STA switching narrowband IoT channels.

2., above-mentioned AP send multi-user switch channel massage after, above-mentioned multiple STA send group acknowledge message (such as: BA simultaneously on respectively new narrowband IoT channel after the completion of channel switches, Block ACK, group acknowledge frame), for confirming that above-mentioned multiple STA have successfully been switched to above-mentioned new narrowband IoT channel.

As shown in Figure 10, AP sends multi-user's switching channel massage to multiple STA (such as STA1, STA2, STA3, STA4), for switching a certain narrowband IoT channel (the narrowband IoT channel of such as multiple STA of narrowband IoT channel m) simultaneously.Above-mentioned multi-user switches the new narrowband IoT channel that channel massage carries the mark for needing to switch multiple STA of narrowband IoT channel and above-mentioned multiple STA will be used.Such as STA1, STA3 will be switched to narrowband IoT channel l, STA2, STA4 etc. from narrowband IoT channel m will be switched to narrowband IoT channel k from narrowband IoT channel m.Above-mentioned multiple STA will be successfully completed channel switching to AP transmission BA confirmation on respectively new narrowband IoT channel simultaneously after switching to new narrowband IoT channel.Above-mentioned BA acknowledges receipt of certain message simultaneously for multiple STA, and it is more efficient that more multiple STA send acknowledgement frame (ACK) one by one.The disadvantage is that in multiple STA (STA1 and STA3 on such as narrowband IoT channel l) that mutually same new narrowband IoT channel sends BA, if there is part STA (such as STA3) does not reply BA to AP in the time of agreement for some reason (such as STA3 does not hear that the multi-user that AP is sent switches channel massage), but since STA1 has replied BA, and it is whose hair that the BA, which cannot be distinguished, in AP (BA and multiple STA of single STA hair while the BA of hair sees in the side AP and is the same), may result in AP can not identify STA3 not yet successful switch channel by the BA received.

Optionally, above-mentioned multi-user, which switches channel massage, can also carry when above-mentioned multiple STA send the instruction that multi-user switches the confirmation message (such as BA) of channel massage.

3., above-mentioned AP send multi-user switch channel massage after, above-mentioned multiple STA send the confirmation message that multi-user switches channel massage to AP in the different time points of respectively new narrowband IoT channel after the completion of channel switches, and successfully switch to new narrowband IoT channel for confirming.The confirmation message that above-mentioned multi-user switches channel massage can be ACK frame.

If Figure 11 shows, AP sends multi-user to multiple STA (such as STA1, STA2, STA3, STA4) and switches channel massage, for switching a certain narrowband IoT channel (the narrowband IoT channel of such as multiple STA of narrowband IoT channel m) simultaneously.Above-mentioned multi-user switches channel massage and carries the mark for needing to switch multiple STA of narrowband IoT channel, when the new narrowband IoT channel used and above-mentioned multiple STA are sent the instruction that multi-user switches the confirmation message (such as ACK) of channel massage by above-mentioned multiple STA.Such as STA1, STA3 will be switched to narrowband IoT channel l, STA2, STA4 etc. from narrowband IoT channel m will be switched to narrowband IoT channel k from narrowband IoT channel m.

After above-mentioned multiple STA switch to new narrowband IoT channel, the switching that ACK confirmation has been successfully completed narrowband IoT channel is sent to AP respectively according to the designated time on respectively new narrowband IoT channel.It should be noted that used herein is ACK rather than BA, i.e., multiple STA on same narrowband IoT channel are the confirmation messages (i.e. ACK) that timesharing sends that above-mentioned multi-user switches channel massage respectively.As sent ACK to AP in the designated time 3 after the designated time 1 switches channel to AP transmission ACK, STA3 after STA1 switching channel.Benefit is that AP can determine which STA has become merits and demerits and is switched on new narrowband IoT channel according to the ACK received.

The embodiment of the invention provides a kind of wireless telecom equipments, and either method embodiment provided in an embodiment of the present invention may be implemented, and specific structure can be the structure of wireless telecom equipment shown in Figure 12, and wherein module S1200 corresponds to above-mentioned wireless telecom equipment.For wireless telecom equipment S1200 comprising submodule S1201, S1202, S1203 and S1204.The wireless telecom equipment may include: processor S1201, memory S1202, transceiver S1203 and antenna S1204.

Submodule S1201 alignment processing device (can be one or more), may be implemented the generation or parsing of switching channel massage, confirmation message (such as ACK, BA etc.).

Submodule S1202 corresponds to memory (can be one or more), is transferred to processor S1201 for storing program code, and by the program code of storage.

Submodule S1203 corresponds to the transceiver of wireless telecom equipment, is used for messaging.Such as, switch channel massage, confirmation message etc..

Submodule S1204 corresponds to the antenna of wireless telecom equipment.

It should be noted that the structure of Legacy equipment, narrowband IoT equipment and the narrowband Legacy+ IoT equipment in the embodiment of the present invention can refer to the structure of above-mentioned wireless telecom equipment, equipment here includes AP and STA.The difference of above-mentioned three essentially consists in the ability of submodule S1203 transceiver and submodule S1201 processor.Wherein the processor and transceiver of Legacy equipment are only capable of in the bandwidth of 20MHz and its integral multiple (such as 40MHz, 80MHz, 160MHz etc.) and generate, parse and receive and dispatch WiFi message；The processor and transceiver of narrowband IoT equipment can generate in the bandwidth (i.e. narrowband) less than 20MHz, parse and receive and dispatch narrowband IoT message；The processor and transceiver of the narrowband Legacy+ IoT equipment can at least generate on 20MHz and bandwidth less than 20MHz, parsing and transmitting-receiving WiFi message, it further can also be in bandwidth (such as 40MHz of 20MHz or more, 80MHz, 160MHz etc.) on generate, parsing and transmitting-receiving narrowband IoT message.

When above-mentioned wireless telecom equipment is specially the first equipment (narrowband the Legacy+ IoT AP in such as embodiment of the present invention one):

The processor S1201 of first equipment, for generating above-mentioned switching channel massage, including above-mentioned single user switching channel massage and above-mentioned multi-user switching channel massage, for switching the narrowband IoT channel of single or multiple STA, above-mentioned switching channel massage is narrowband message.The processor S1201 of above-mentioned first equipment can be also used for being that above-mentioned STA distributes narrowband IoT channel according to channel assignment strategy.

The transceiver S1203 of first equipment, for sending the above-mentioned switching channel massage of processor S1201 generation.

The memory S1202 of first equipment is also used to store above-mentioned narrowband IoT channel selection list.

When above-mentioned wireless device is specially the second equipment (STA in such as embodiment of the present invention one):

The transceiver S1203 of second equipment, the above-mentioned switching channel massage sent for receiving above-mentioned first equipment；

The processor S1201 of second equipment, the above-mentioned switching channel massage sent for parsing above-mentioned first equipment；And the confirmation message of above-mentioned switching channel massage is generated, such as ACK or BA.

The transceiver S1203 of second equipment is also used to send the confirmation message of above-mentioned switching channel massage, such as ACK or BA.

Technical solution bring beneficial effect of the embodiment of the present invention includes:

Once the narrowband IoT primary channels that STA is used determine therewith since AP selectes 20MHz primary channels in traditional 802.11 agreements.And there may be multiple narrowband IoT channels available in WiFi IoT scene, therefore AP needs new narrowband IoT channel assignment strategy to adapt to the scene.When STA is associated with AP in the embodiment of the present invention, AP switches channel massage according to narrowband IoT frequency assignment list, by sending, for it is above-mentioned it is new establish associated STA and distribute reasonable narrowband IoT channel, improve the performance of WiFi system.

It is all to be required to be switched on new 20MHz channel with the associated STA of AP when AP switches primary 20MHz channel in traditional 802.11 agreements.And in WiFi IoT scene, it due to there is multiple narrowband IoT channels for switching under primary 20MHz channel, does not need all to concentrate on some narrowband IoT channel with the associated multiple STA of AP, it is therefore desirable to which new mechanism adapts to this characteristic.AP switches channel massage by sending multi-user to STA in the embodiment of the present invention, multiple STA on same narrowband IoT channel is switched on different narrowband IoT channels, improves channel switching efficiency and optimize WiFi system performance.AP effectively helps AP to see whether the equal successful switch of all STA to new narrowband IoT channel by indicating that different STA send in the different designated times confirmation message of above-mentioned switching channel massage in switching channel massage.

The embodiment of the invention also provides a kind of channels to control equipment, applied to the first equipment, the bandwidth that above-mentioned first equipment supports broadband and narrowband to transmit as message includes N number of nonoverlapping subchannel under the broadband that above-mentioned first equipment uses, and above-mentioned N number of subchannel is the channel of narrowband；As shown in figure 13, above-mentioned channel control equipment includes:

Transmission unit 1301, for sending the switching channel massage for carrying the second subchannel and indicating to the second equipment in the first subchannel, above-mentioned switching channel massage is sent in above-mentioned first subchannel, above-mentioned second subchannel is the new subchannel that above-mentioned first equipment is above-mentioned second equipment distribution, for above-mentioned second equipment to be switched to above-mentioned second subchannel；Above-mentioned first subchannel and above-mentioned second subchannel belong to above-mentioned N number of nonoverlapping subchannel, and different；

Receiving unit 1302, for receiving the confirmation message for the above-mentioned switching channel massage that above-mentioned second equipment is sent in above-mentioned second subchannel, above-mentioned confirmation message confirms that above-mentioned second equipment has been switched to above-mentioned second subchannel for above-mentioned first equipment.

In an optional implementation manner, above-mentioned channel controls equipment further include:

Above-mentioned transmission unit 1301, specifically for above-mentioned first equipment and above-mentioned second equipment established using above-mentioned first subchannel it is associated during send above-mentioned switching channel massage；Alternatively, sending above-mentioned switching channel massage in the case where above-mentioned first equipment executes load balancing.

In an optional implementation manner, above-mentioned broadband has 20MHz or 20MHz band above；Above-mentioned narrowband has 20MHz or less bandwidth.

In an optional implementation manner, as shown in figure 14, above-mentioned channel controls equipment further include:

Channel-assignment unit 1401, for being that above-mentioned second equipment distributes the second subchannel according to channel assignment strategy；

Above-mentioned channel assignment strategy include any one:

It is at random that above-mentioned second equipment selects subchannel as above-mentioned second subchannel from above-mentioned N number of nonoverlapping subchannel；

Alternatively, selecting subchannel as above-mentioned second subchannel in least subchannel from using；

Alternatively, selecting subchannel as above-mentioned second subchannel from the best subchannel of signal-to-noise ratio.

In an optional implementation manner, above-mentioned second subchannel is the subchannel in above-mentioned N number of nonoverlapping subchannel in M sub-channels, the set for the subchannel that grouping where above-mentioned M sub-channels are above-mentioned second equipment uses.

In an optional implementation manner, above-mentioned M sub-channels and the intersection of sets collection of target subchannel are sky, and the collection of above-mentioned target subchannel is combined into the set for having subchannel used in the grouping of overlapping region with the grouping where above-mentioned second equipment.

In an optional implementation manner, it is according to the classification carried out that the grouping of above-mentioned second equipment, which includes: according to the business of above-mentioned second equipment or geographical location,.

In an optional implementation manner, above-mentioned second equipment include 1 perhaps 1 or more above-mentioned second subchannel of entity device include 1 or 1 or more subchannel.

In an optional implementation manner, above-mentioned switching channel massage is that single user switches channel massage, then for switching packet Subchannel used in above-mentioned second equipment containing 1 entity device；

Alternatively, above-mentioned switching channel massage is that multi-user switches channel massage, then for switching subchannel used in above-mentioned second equipment comprising 1 or 1 or more entity device.

In an optional implementation manner, above-mentioned second device identification and above-mentioned second subchannel corresponding with above-mentioned second device identification are also carried in above-mentioned switching channel massage.

In an optional implementation manner, above-mentioned switching channel massage also carries the time instruction that above-mentioned second equipment sends the confirmation message of above-mentioned switching channel massage, is used to indicate the time that above-mentioned second equipment sends the confirmation message of above-mentioned switching channel massage；

Alternatively, above-mentioned switching channel massage indicates that above-mentioned second equipment sends the confirmation message of above-mentioned switching channel massage in the default time of above-mentioned first equipment.

The embodiment of the invention also provides a kind of first equipment, and as shown in figure 15, above-mentioned first equipment includes:

Transceiver 1501 at least supports the bandwidth for using 20MHz and 20MHz or less bandwidth to transmit as message；There is N number of nonoverlapping subchannel under the 20MHz bandwidth that above-mentioned transceiver uses, above-mentioned N number of subchannel is 20MHz with lower channel, and wherein N is positive integer；Switching channel massage is sent to the said one or multiple second equipment being in the first subchannel for the first equipment, above-mentioned switching channel massage is sent in above-mentioned first subchannel, one or more new subchannels that above-mentioned first equipment is distributed according to channel assignment strategy for said one or multiple second equipment are carried, for said one or multiple second equipment to be switched to said one or multiple new subchannels；

Transceiver 1501, it is also used to the confirmation message that above-mentioned first equipment receives the above-mentioned switching channel massage that said one or multiple second equipment are sent in said one or multiple new subchannels, has been switched to said one or multiple new subchannels to the confirmation of above-mentioned first equipment for said one or multiple second equipment；

Processor 1503, for generating above-mentioned switching channel massage, and the confirmation message of the above-mentioned switching channel massage of parsing；

Processor 1503 is also used to be that said one or multiple second equipment select said one or multiple new subchannels according to channel assignment strategy；Above-mentioned channel assignment strategy includes at least one of following:

Processor 1503 selects one or more subchannels as said one or multiple new subchannels from above-mentioned N number of nonoverlapping subchannel for said one or multiple second equipment at random；

Or, processor 1503, uses from grouping locating for said one or multiple second equipment and select one or more subchannels as said one or multiple new subchannels in least subchannel, each grouping uses at least one subchannel；

Or, processor 1503, select one or more as said one or multiple new subchannels in the subchannel best from signal-to-noise ratio in grouping locating for said one or multiple second equipment；

Memory 1502, for storing program code and instruction；It is also used to store above-mentioned channel assignment strategy；

Antenna 1504, for the messaging from wireless medium.

In an optional implementation manner, above-mentioned first equipment selects wherein M nonoverlapping subchannels in above-mentioned N number of nonoverlapping subchannel in above-mentioned channel assignment strategy；Above-mentioned first equipment is selected from above-mentioned M nonoverlapping subchannels One of said one or multiple new subchannels used as said one or multiple second equipment；Wherein M is the positive integer no more than N.

Assuming that AP can distribute one in N number of narrowband IoT channel as new channel for narrowband IoT STA, AP can select wherein M narrowband IoT channel to the STA in a certain grouping in above-mentioned N number of narrowband IoT channel, as the assignable new channel of STA in the grouping, M is the positive integer no more than N.Benefit is in two neighbor bss S, if the interference between two neighbor bss S can be effectively reduced using different narrowband IoT channels in neighbouring or overlapped coverage narrowband IoT STA on geographical location.

In an optional implementation manner, it is not exactly the same that the said one in locating different grouping or multiple second equipment use above-mentioned M are not overlapped subchannel.

In an optional implementation manner, if above-mentioned first equipment sends above-mentioned switching channel massage to the second equipment of said one, above-mentioned switching channel massage is that single user switches channel massage, for switching subchannel used in the second equipment of said one；

If above-mentioned first equipment sends above-mentioned switching channel massage to above-mentioned multiple second equipment, above-mentioned switching channel massage is that multi-user switches channel massage, for switching subchannel used in above-mentioned multiple second equipment.

Single user switching channel massage is for switching narrowband IoT channel used in single narrowband IoT STA；Multi-user switches channel massage for switching narrowband IoT channel used in multiple narrowband IoT STA, and the narrowband IoT channel that multiple narrowband IoT STA are used originally here need to be identical, and the new narrowband IoT channel after switching may be the same or different.Same channel will be all switched to by comparing above-mentioned STA in traditional 802.11 agreements, and multiuser channel handover request here is more flexible.

In an optional implementation manner, above-mentioned switching channel massage also carries the mark of said one or multiple second equipment, is used to indicate said one or multiple second equipment need to switch channel to said one or multiple new subchannels.

When multiple narrowband IoT STA need to be switched to multiple new narrowband IoT channels, the identification information (such as MAC Address or AID) for needing to indicate above-mentioned narrowband IoT STA in multi-user's switching channel massage, is used to indicate which new narrowband IoT channel which narrowband IoT STA will be switched on.

In an optional implementation manner, the time that above-mentioned switching channel massage also carries the confirmation message that said one or multiple second equipment send above-mentioned switching channel massage indicates, is used to indicate said one or multiple second equipment send the confirmation message of above-mentioned switching channel massage in preset time.

In order to avoid colliding between the confirmation message of multiple narrowband IoT STA multi-user's switching channel massage replied, cause AP that can not determine which narrowband IoT STA has sent the confirmation message that above-mentioned multi-user switches channel massage, AP can be added above-mentioned multiple narrowband IoT STA in above-mentioned multi-user switching channel massage and send the preset time that above-mentioned multi-user switches the confirmation message of channel massage, so which narrowband IoT STA successful switch AP can be confirmed to new channel.

In an optional implementation manner, above-mentioned switching channel massage instruction said one or multiple second equipment are that above-mentioned first equipment replys the confirmation message of above-mentioned switching channel massage in the time of default agreement.

6th aspect, the embodiment of the invention also provides a kind of wireless telecom equipments, as shown in figure 16, use as the first equipment, include: input-output equipment 1601, processor 1602 and memory 1603；Wherein memory 1603 can be used for Processor is provided and carries out caching or other data storage requirements required for data processing；Input-output equipment 1601 then provides the ability communicated between the access device and the second equipment；The processor 1602 for realizing the method flow of any one provided in an embodiment of the present invention control.

The embodiment of the invention also provides a kind of wireless telecom equipments, as shown in figure 16, use as the first equipment, include: input-output equipment 1601, processor 1602 and memory 1603；Wherein, memory 1603 is stored with program instruction, which is used to realize the method flow of any one provided in an embodiment of the present invention during executing the program instruction.Input-output equipment 1601 is then for realizing the communication between the second equipment.

Above-mentioned input-output equipment 1601, processor 1602 and memory 1603 can be connected with each other by bus.

Memory 1603 include but is not limited to be random access memory (Random Access Memory, RAM), read-only memory (Read-Only Memory, ROM), Erasable Programmable Read Only Memory EPROM (Erasable Programmable Read Only Memory,) or portable read-only memory (Compact Disc Read-Only Memory EPROM, CD-ROM), which is used for dependent instruction and data.Input-output equipment 1601 is for sending and receiving data.

Processor 1602 can be one or more central processing units (Central Processing Unit, CPU), and in the case where processor 1602 is a CPU, which can be monokaryon CPU, be also possible to multi-core CPU.

Relevant portion can be referred to mutually between each method embodiment of the present invention；Device provided by each Installation practice is for executing method provided by corresponding embodiment of the method, therefore each Installation practice can be understood with reference to the relevant portion in relevant embodiment of the method.

The title of the message/frame, module or the unit that provide in various embodiments of the present invention is merely illustrative, other titles can be used, as long as the effect of message/frame, module or unit is identical.

Those of ordinary skill in the art will appreciate that implementing the method for the above embodiments is that related hardware can be instructed to complete by program, above-mentioned program can store in the readable storage medium storing program for executing of an equipment, the program is when being executed, including above-mentioned all or part of the steps, above-mentioned storage medium, such as: FLASH, EEPROM.

The above above-mentioned specific embodiment; the purpose of the present invention, technical scheme and beneficial effects are had been further described; it should be understood that; different embodiments can be combined; above the above is only a specific embodiment of the present invention, is not intended to limit the scope of protection of the present invention, all within the spirits and principles of the present invention; any combination, modification, equivalent replacement, improvement for being made etc., within the scope of should be included in disclosed in the embodiment of the present invention.

Claims

A kind of method of channel control, it is characterized in that, it is applied to the first equipment, the bandwidth that first equipment supports broadband and narrowband to transmit as message, it include N number of nonoverlapping subchannel under the broadband that first equipment uses, N number of subchannel is the channel of narrowband；The described method includes:

First equipment sends the switching channel massage for carrying the second subchannel and indicating to the second equipment in the first subchannel, the switching channel massage is sent in first subchannel, second subchannel is the new subchannel that first equipment is the second equipment distribution, for second equipment to be switched to second subchannel；First subchannel and second subchannel belong to N number of nonoverlapping subchannel, and different；

First equipment receives the confirmation message for the switching channel massage that second equipment is sent in second subchannel, and the confirmation message confirms that second equipment has been switched to second subchannel for first equipment.
Method according to claim 1, which is characterized in that the method also includes:

The switching channel massage establishes associated transmission in the process using first subchannel in first equipment and second equipment；

Alternatively, the switching channel massage is sent in the case where first equipment executes load balancing.
Method according to claim 1, which is characterized in that the broadband has 20MHz or 20MHz band above；The narrowband has 20MHz or less bandwidth.
Method according to claim 1, which is characterized in that before second equipment in the first subchannel sends and carries the switching channel massage that the second subchannel indicates, the method also includes:

First equipment is that second equipment distributes the second subchannel according to channel assignment strategy；

The channel assignment strategy include any one:

First equipment is at random that second equipment selects subchannel as second subchannel from N number of nonoverlapping subchannel；

Alternatively, first equipment from use selected in least subchannel wherein 1 sub-channels as second subchannel；

Alternatively, first equipment selected from the best subchannel of signal-to-noise ratio wherein 1 sub-channels as second subchannel.
Method according to claim 4, which is characterized in that the method also includes:

Second subchannel is the subchannel in N number of nonoverlapping subchannel in M sub-channels, the set for the subchannel that grouping where the M sub-channels are second equipment uses.
Method according to claim 5, which is characterized in that the method also includes:

The M sub-channels and the intersection of sets collection of target subchannel are sky, and the collection of the target subchannel is combined into the set for having subchannel used in the grouping of overlapping region with the grouping where second equipment.
Method according to claim 6, which is characterized in that the grouping of second equipment includes:

It is according to the classification carried out according to the business of second equipment or geographical location.
According to claim 1 to 7 any one the methods, which is characterized in that

Second equipment include 1 perhaps 1 or more entity device second subchannel include 1 or 1 or more subchannel.
Method according to claim 8, which is characterized in that the method also includes:

The switching channel massage is that single user switches channel massage, then for switching described second comprising 1 entity device Subchannel used in equipment；

Alternatively, the switching channel massage is that multi-user switches channel massage, for switching subchannel used in second equipment comprising 1 or 1 or more entity device.
According to claim 1 to 7 any one the methods, which is characterized in that the method also includes:

Second device identification and second subchannel corresponding with second device identification are also carried in the switching channel massage, second equipment includes 1 or more entity device.
According to claim 1 to 7 any one the methods, which is characterized in that the method also includes:

The switching channel massage also carries the time instruction that second equipment sends the confirmation message of the switching channel massage, is used to indicate the time that second equipment sends the confirmation message of the switching channel massage；

Alternatively, the switching channel massage indicates that second equipment sends the confirmation message of the switching channel massage in the default time of first equipment.
A kind of channel control equipment, applied to the first equipment, which is characterized in that the bandwidth that first equipment supports broadband and narrowband to transmit as message, it include N number of nonoverlapping subchannel under the broadband that first equipment uses, N number of subchannel is the channel of narrowband；The channel controls equipment

Transmission unit, for sending the switching channel massage for carrying the second subchannel and indicating to the second equipment in the first subchannel, the switching channel massage is sent in first subchannel, second subchannel is the new subchannel that first equipment is the second equipment distribution, for second equipment to be switched to second subchannel；First subchannel and second subchannel belong to N number of nonoverlapping subchannel, and different；

Receiving unit, for receiving the confirmation message for the switching channel massage that second equipment is sent in second subchannel, the confirmation message confirms that second equipment has been switched to second subchannel for first equipment.
According to claim 12, channel controls equipment, which is characterized in that

The transmission unit, specifically for first equipment and second equipment established using first subchannel it is associated during send the switching channel massage；Alternatively, sending the switching channel massage in the case where first equipment executes load balancing.
According to claim 12, channel controls equipment, which is characterized in that the broadband has 20MHz or 20MHz band above；The narrowband has 20MHz or less bandwidth.
According to claim 12, channel controls equipment, which is characterized in that the channel controls equipment further include:

Channel-assignment unit, for being that second equipment distributes the second subchannel according to channel assignment strategy；

The channel assignment strategy include any one:

It is at random that second equipment selects subchannel as second subchannel from N number of nonoverlapping subchannel；

Alternatively, from use selected in least subchannel wherein 1 sub-channels as second subchannel；

Alternatively, selected from the best subchannel of signal-to-noise ratio wherein 1 sub-channels as second subchannel.
According to claim 15, channel controls equipment, which is characterized in that

Second subchannel is the subchannel in N number of nonoverlapping subchannel in M sub-channels, the set for the subchannel that grouping where the M sub-channels are second equipment uses.
According to claim 1,6 channels control equipment, which is characterized in that

The M sub-channels and the intersection of sets collection of target subchannel are sky, and the collection of the target subchannel is combined into the set for having subchannel used in the grouping of overlapping region with the grouping where second equipment.
According to claim 1,7 channels control equipment, which is characterized in that

It is according to the classification carried out that the grouping of second equipment, which includes: according to the business of second equipment or geographical location,.
According to claim 1, channel described in 2 to 18 any one controls equipment, which is characterized in that

Second equipment include 1 perhaps 1 or more entity device second subchannel include 1 or 1 or more subchannel.
According to claim 1,9 channels control equipment, which is characterized in that

The switching channel massage is that single user switches channel massage, then for switching subchannel used in second equipment comprising 1 entity device；

Alternatively, the switching channel massage is that multi-user switches channel massage, then for switching subchannel used in second equipment comprising 1 or 1 or more entity device.
According to claim 1, channel described in 2 to 18 any one controls equipment, which is characterized in that

Second device identification and second subchannel corresponding with second device identification are also carried in the switching channel massage, second equipment includes 1 or more entity device.
According to claim 1, channel described in 2 to 18 any one controls equipment, which is characterized in that

The switching channel massage also carries the time instruction that second equipment sends the confirmation message of the switching channel massage, is used to indicate the time that second equipment sends the confirmation message of the switching channel massage；

Alternatively, the switching channel massage indicates that second equipment sends the confirmation message of the switching channel massage in the default time of first equipment.