CN103609165A - Method and device for use in channel handover - Google Patents
Method and device for use in channel handover Download PDFInfo
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- CN103609165A CN103609165A CN201280013188.2A CN201280013188A CN103609165A CN 103609165 A CN103609165 A CN 103609165A CN 201280013188 A CN201280013188 A CN 201280013188A CN 103609165 A CN103609165 A CN 103609165A
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/0005—Control or signalling for completing the hand-off
- H04W36/0055—Transmission or use of information for re-establishing the radio link
- H04W36/0072—Transmission or use of information for re-establishing the radio link of resource information of target access point
Abstract
Disclosed are a method and device for use in channel handover. A channel handover notice carrying a working subchannel mapping and a starting channel number is transmitted. The working subchannel mapping is for indicating the presence or absence of multiple working subchannels, a lowest working subchannel among the multiple working subchannels is the lowest working subchannel corresponding to a starting frequency of a frequency band occupied by a network side, while the starting channel number is for indicating the channel number of the lowest working subchannel corresponding to the starting frequency of the frequency band occupied by the network side. Specific channel number of each working subchannel indicated can be acquired on the basis of the two pieces of information carried in the channel handover notice, compared with a method of carrying directly the channel number in the channel handover notice, the method allows for reduced number of bits used, thus conserving signaling overhead.
Description
The method and device switched for channel is August in 2011 5 days, Application No. 201 11,022,471 1.3, the priority of the Chinese earlier application of entitled " channel switching method and device " this application claims the applying date, and the full content of the earlier application has embodied in this application.
Be on 2 15th, 2012 this application claims the applying date, the priority of Application No. 201210034419.X, the Chinese earlier application of entitled " wireless communications method and device ", the full content of the earlier application embodied in this application.Technical field
The invention belongs to the method and device of communication technical field, more particularly, to channel switching.In recent years, the wireless communication system of short communication distance has the wireless local area network technology WiFi based on 802.11 standards, based on 802.15 bluetooth to background technology in being applied to（Bluetooth) system and by GSM ^ " it is raw and Lai towards Femto technologies of indoor application etc..
It is now using a kind of most wide wireless network transmission technology based on 802.1 1 WiFi technology.Because WiFi system employs carrier sense/conflict avoidance（CSMA/CA, Carrier Sense Multiple Access with Collision Avoidance) mechanism, system effectiveness compared with ^ [third constellations, it is larger to Radio Resource-waste.
Femto technologies based on 3GPP standards be from GSM evolution come a kind of new technology towards in-door covering.However, GSM（Including Femto systems) time division duplex（TDD, Time Division Duplexing) duplex mode, up-downgoing resource static allocation, in face of the different Various types of data business of demand, for example：Browse webpage, mobile video, moving game, Machine To Machine（M2M, machine-to-machine) etc., it is difficult to realize the dynamic adaptation that business demand is divided with resource.
It is different from traditional cable network, the main feature of unstable, qualitative and terminal the mobility of Radio Link short communication distance wireless access system in being always.In order to provide the user sport technique segment essential in short communication distance wireless access system during the handover management between continuous sex service, channel just turns into.The content of the invention
In view of this, it is an object of the invention to provide the method and device switched for channel.
There is a basic understanding for some aspects of the embodiment to disclosure, shown below is the summary of cylinder list.The summarized section is not extensive overview, nor to determine key/critical component or describe the protection domain of these embodiments.Its sole purpose is that some concepts are presented with the form of cylinder list, and bright preamble is described in detail in this, as commenting below.
The embodiment of the present invention provides a kind of method switched for channel, and this method includes：
Generation carries the channel-switch-announcement of work subchannel mappings and starting channel number；
Send the channel-switch-announcement；
Wherein, the work subchannel mappings indicate the presence or absence of multiple work subchannels, and the minimum work subchannel in the multiple work subchannel is the corresponding minimum work subchannel of network side band occupancy initial frequency；The starting channel number indicates the channel number of the corresponding minimum work subchannel of network side band occupancy initial frequency.
As optional embodiment, the work subchannel mappings are realized with bitmap bitmap, wherein each bit is an indicating bit, each indicating bit is used to indicate the presence or absence of work subchannel.
As optional embodiment, the work subchannel that the work subchannel mappings are indicated is the target terminal work subchannel to be switched to, and the channel-switch-announcement unicast or broadcast is sent to the target terminal.
Further, such as the next item down or several are also carried in the channel-switch-announcement：
Indicate the channel mode to the limitation of transmission during channel switching；
Indicate from the channel-switch count device for sending channel-switch-announcement to the setting duration for being switched to work subchannel；
The target operation bandwidth of network side；
The spectrum aggregating pattern for the two or more work subchannel that the work subchannel mappings are indicated.
As optional embodiment, the work subchannel indicates that network side performs the work subchannel after channel switching, and the channel-switch-announcement broadcasts to all terminals.
Further, the spectrum aggregating pattern between the work at present bandwidth of network side and/or the two or more work subchannel of work subchannel mappings instruction is also carried in the channel-switch-announcement.
As optional embodiment, in addition to：
Determine the channel quality for each work subchannel that network side takes；
Channel handover decisions are carried out according to the channel quality.
Optionally, further, the channel quality of each work subchannel for determining network side occupancy is：Receive the channel measurement that each terminal is sent；
The channel handover decisions include：For each channel measurement received, if the channel measurement that terminal is reported indicates that the channel quality of its work subchannel taken is less than the first given threshold, using the terminal as target terminal, and it is the target terminal selection work subchannel to be switched to from other work subchannels and/or new available subchannels of channel quality higher than the first given threshold of network side occupancy.
Optionally, further, the channel quality of each work subchannel for determining network side occupancy is：Channel quality is measured in network side；
The channel handover decisions include：Channel quality is less than to the terminal in the work subchannel of the second given threshold as target terminal, and is the target terminal selection work subchannel to be switched to from other work subchannels and/or new available subchannels of channel quality higher than the second given threshold of network side occupancy.
During the above-mentioned selection work subchannel to be switched to for the target terminal, further combined with the business demand of channel loading and/or target terminal.
Channel handover decisions described above further comprise：From network side take other work subchannels and/
Or in new available subchannels for network side select the work subchannel to be switched to.
Further, above-mentioned channel handover decisions can also include：Determine the target operation bandwidth of network side.The embodiment of the present invention also provides a kind of device switched for channel, and the device includes：
Generation unit, the channel-switch-announcement of work subchannel mappings and starting channel number is carried for generating；Transmitting element, for sending the channel-switch-announcement；
Wherein, the work subchannel mappings indicate the presence or absence of multiple work subchannels, wherein minimum work subchannel is the corresponding minimum work subchannel of network side band occupancy initial frequency；The starting channel number indicates the channel number of the corresponding minimum work subchannel of network side band occupancy initial frequency.
As optional embodiment, the work subchannel mappings are realized with bitmap bitmap, wherein each bit is an indicating bit, each indicating bit is used to indicate the presence or absence of work subchannel.
As optional embodiment, the work subchannel that the work subchannel mappings are indicated is the target terminal work subchannel to be switched to；
Channel-switch-announcement unicast or broadcast is sent to the target terminal by the transmitting element.
Further, the generation unit further carries such as the next item down or several in the channel-switch-announcement：
Indicate the channel mode to the limitation of transmission during channel switching；
Indicate from the channel-switch count device for sending channel-switch-announcement to the setting duration for being switched to work subchannel；
The target operation bandwidth of network side；
The spectrum aggregating pattern for the two or more work subchannel that the work subchannel mappings are indicated.
As optional embodiment, the work subchannel indicates that network side performs the work subchannel after channel switching, and the channel-switch-announcement broadcasts to all terminals.
Further, the generation unit further carries the spectrum aggregating pattern between the work at present bandwidth of network side and/or the two or more work subchannel of work subchannel mappings instruction in channel-switch-announcement.
As optional embodiment, the device also includes：
Determining unit, the channel quality for determining each work subchannel that network side takes；Handover decisions unit, for blunt according to channel quality progress channel handover decisions.
Optionally, further, the determining unit receives the channel measurement that each terminal is sent, to determine the channel quality for each work subchannel that network side takes；
The handover decisions unit is directed to each channel measurement received, if the channel measurement that terminal is reported indicates that the channel quality of its work subchannel taken is less than the first given threshold, using the terminal as target terminal, and it is the target terminal selection work subchannel to be switched to from other work subchannels and/or new available subchannels of channel quality higher than the first given threshold of network side occupancy.
Optionally, further, the determining unit measures channel quality in network side, to determine the channel quality for each work subchannel that network side takes；
The handover decisions unit using channel quality less than the terminal in the work subchannel of the second given threshold as target terminal, and the channel quality taken from network side is sub higher than other work of the second given threshold
It is the target terminal selection work subchannel to be switched in channel and/or new available subchannels.Above-mentioned channel decision unit for the target terminal when selecting the work subchannel to be switched to, further combined with the business demand of channel loading and/or target terminal.
In other work subchannels and/or new available subchannels that above-mentioned handover decisions unit further takes from network side the work subchannel to be switched to is selected for network side.
Further, above-mentioned handover decisions unit can also determine the target operation bandwidth of network side.
For above-mentioned and related purpose, the feature being particularly pointed out in the claims will be described in detail later in one or more embodiments.Following explanation and accompanying drawing describe some modes in some illustrative aspects, and the only utilizable various modes of principle of each embodiment of its instruction in detail.Other benefits and novel features are by as following detailed description is considered in conjunction with the accompanying and becomes obvious, and the disclosed embodiments are to include all these aspects and they are equal.Brief description of the drawings
Fig. 1 is the flow chart of the method switched in the embodiment of the present invention for channel；
Fig. 2 is the wireless office i of enhanced ultrahigh speed or net（EUHT, enhanced ultra high throughput wireless local area network) system networking schematic diagram；
Fig. 3 is the flow chart for channel switching method in application example one of the present invention；
Fig. 4 be the embodiment of the present invention in a kind of channel-switch-announcement frame structural representation；
Fig. 5 be the embodiment of the present invention in another channel-switch-announcement frame structural representation；Fig. 6 is that the channel in application example two of the present invention switches front and rear schematic diagram；
Fig. 7 is that the channel in application example three of the present invention switches front and rear schematic diagram；
Fig. 8 is that the channel in application example four of the present invention switches front and rear schematic diagram；
Fig. 9 is that the channel in application example five of the present invention switches front and rear schematic diagram；
Figure 10 is that the channel in application example six of the present invention switches front and rear schematic diagram；
Figure 11 is the structural representation of the device switched in the embodiment of the present invention for channel；
Figure 12 is the structural representation of the device switched in application example seven of the present invention for channel.Embodiment
The following description and drawings fully show specific embodiments of the present invention, to enable those skilled in the art to put into practice them.Other embodiments can include structure, logic, electric, process and other changes.Embodiment only represents possible change.Unless explicitly requested, otherwise single component and function are optional, and the order operated can change.The part of some embodiments and feature can be included in or replace part and the feature of other embodiments.The scope of embodiment of the present invention includes the gamut of claims, and claims all obtainable equivalents.Herein, these embodiments of the present invention individually or can be represented generally with term " invention ", it is convenient that this is used for the purpose of, and if in fact disclosing the invention more than one, the scope for being not meant to automatically limit the application is any single invention or inventive concept.
In some wireless communication systems, network side can take more than one work subchannel, and terminal may reside within more than one described work subchannel.It is used for the method for channel switching in the embodiment of the present invention just
It is to be proposed for this kind of wireless communication system.
Fig. 1 is is used for the flow chart for the method that channel switches in the embodiment of the present invention, the flow includes：Step 11:Generation carries the channel-switch-announcement of work subchannel mappings and starting channel number.
In this step, work subchannel mappings indicate the presence or absence of multiple work subchannels, and the minimum work subchannel in the multiple work subchannel is the corresponding minimum work subchannel of network side band occupancy initial frequency.Originate the channel number that channel number indicates the corresponding minimum work subchannel of network side band occupancy initial frequency.
Step 12:Send the channel-switch-announcement.
The method of the embodiment of the present invention can serve to indicate that terminal carries out channel switching, the work subchannel mappings that now channel-switch-announcement is carried indicate the work subchannel that target terminal will be switched to, the channel number that channel number indicates the corresponding minimum work subchannel of network side band occupancy initial frequency is originated, then target terminal performs channel switching by this parameter.
The method of the embodiment of the present invention can also be after network side switches all terminals from the work subchannel of itself to serving cell circulate a notice of this switching result, the work subchannel mappings that now channel-switch-announcement is carried indicate that network side performs the work subchannel after channel switching, and starting channel number indicates the channel number of the corresponding minimum work subchannel of network side band occupancy initial frequency.
Because work subchannel mappings can indicate the presence or absence of multiple work subchannels, and work subchannel in most 4 third constellations therein is the corresponding minimum work subchannel of network side band occupancy initial frequency, and starting channel number indicates the channel number of the corresponding minimum work subchannel of network side band occupancy initial frequency.According to this two information carried in channel-switch-announcement, you can to know the specific channel number of each work subchannel indicated in channel-switch-announcement.Relative to the mode that channel number is directly carried in channel-switch-announcement, this mode allows to use less bit number, so as to save signaling consumption.
Some embodiments of the inventive method are given below.These embodiments are using EUHT systems as application scenarios.
EUHT systems support the central access point of different bandwidth capabilities（CAP, Central Access Point) and website（STA, Station) carry out networking and be in communication with each other, EUHT systems can support 40MHz and 80MHz frequency spectrums continuously or discontinuously bandwidth using 20MHz as primary bandwidth by the general polymerizations of frequency i.Fig. 2 is the networking schematic diagram of EUHT systems.
According to whether being carried out data transmission using middle protection subcarrier, the multicarrier operation pattern that EUHT is supported includes：
Aggregation scheme 1:Each 20MHz subchannels are independent channel, 20MHz, 40MHz and 80MHz CAP and the STA individual transmission in one or more 20MHz subchannels；
Aggregation scheme 2:Multiple continuous 20MHz subchannels polymerizations, 40MHz and 80MHz CAP and STA frequency domain can be continuously transmitted on aggregated channel.
It can be seen that, for the access service with low cost to terminal user's offer high-speed, it is proposed that EUHT systems.Wherein, in order to realize high rate services, employ and be more applicable for industrial scientific medical（ISM, Industrial Scientific Medical) frequency range the general aggregation schemes of frequency i, the embodiment of the present invention proposed under multiband aggregation scheme to channel selection with switching management operate.
It is just blunt according to concrete application scene, CAP is configurable to 20MHz, 40MHz or 80MHz different bandwidth capabilities, and allow the STA accesses of 20MHz, 40MHz or 80MHz different bandwidth capabilities, 20MHz STA can only selective polymerization pattern Isosorbide-5-Nitrae 0MHz and 80MHz STA may be selected aggregation scheme 1 or 2.CAP can also support multiple STA time division transmissions of different bandwidth pattern in a downlink data transmission.
As can be seen here, CAP can take the sub-channels or several continuous or discrete subchannels in 4 subchannels with a width of 20MHz, and the subchannel that CAP takes is exactly CAP work subchannel.After a STA accesses the CAP by networking flow, it may reside within any one or any several continuous or discrete CAP work subchannel.Several application examples in present invention method are given below, in these application examples, the executive agent of method and step can be CAP or the independent community with CAP homonymies, below temporarily so that CAP is executive agent as an example.Application example one
Fig. 3 is is used for the flow chart for the method that channel switches in application example one of the present invention, the flow includes：Step 31:CAP determines the channel quality of each work subchannel taken.
In this step, CAP can determine the channel quality of each work subchannel taken by two ways.
The first, channel measurement that CAP is reported by STA is determined.
STA can start channel measurement in the case where there：
Firstth, STAs of the CAP periodically into serving cell sends measurement request, and STA proceeds by channel measurement after receiving measurement request, and channel measurement is reported into CAP.
Secondth, STA periodically carries out channel measurement, and channel measurement is reported into CAP.In this application example one, STA carries out channel measurement to the work subchannel oneself being resident.
STA is also an option that in some cases carries out channel measurement to CAP other work subchannels, if such as bandwidth of operation is currently resided only in a CAP work subchannel for 40MHz STA, the STA can also further measure CAP another work subchannel.
Second, CAP performs channel measurement in network side.
CAP can periodically perform the channel measurement of network side, can also be triggered by handover events such as link degradations and perform channel measurement.
Step 32:CAP carries out channel handover decisions according to channel quality.
In this step, for above-mentioned first way, CAP carries out channel handover decisions for each measurement result received, if the channel measurement that certain STA is reported indicates that the channel quality for the work subchannel that the STA takes is less than the first given threshold, using the STA as target STA, and it is the target STA selections work subchannel to be switched to from other work subchannels and/or new available subchannels of channel quality higher than the first given threshold of CAP occupancy.
For the above-mentioned second way, channel quality is less than the work subchannel of the second given threshold by CAP
On STA as target STA, and from CAP take channel quality higher than the second given threshold other work subchannels and/or new available subchannels in for target STA select the work subchannel to be switched to.
Further, CAP is also required to switch the work subchannel oneself taken in some cases, for example when CAP is less than the second given threshold in the channel quality that network side measures some work subchannel, illustrate that the work subchannel receives stronger the thousand of other wireless communication systems and disturbed, now the STA not only in the work subchannel needs to perform channel switching, CAP can also abandon using the work subchannel, for example, only keep taking other work subchannels currently taken and/or the new available subchannels of selection.When CAP switches the work subchannel of oneself occupancy, the bandwidth of operation of oneself can also be changed.
Above-mentioned new available subchannels, are known by CAP by way of scanning channel list.
As an alternative embodiment, CAP can be combined with the business demand of other factors, such as channel loading and/or target STA when carrying out channel handover decisions.By taking target STA business demand as an example, assuming that current goal STA1 carries out voice conversation service, and target STA2 carries out business of networking, CAP is when for the target STA1 and target STA2 selection work subchannels to be switched to, outside the channel quality for considering work subchannel, the business demand of different target STA current carrying can also be considered.Although then CAP can not be the maximum but best work subchannel of channel quality for the target STA1 selection available bandwidths for performing speech business, and be the bigger work subchannel of the target STA2 selection good available bandwidths of present channel quality time for performing business of networking.
Step 33:CAP sends channel-switch-announcement to each target STA.
In this step, if the work subchannel all same that all STA in this serving cell are target STA and they to be switched to, CAP can send channel-switch-announcement by way of broadcast.
If the part STA in this serving cell is different for target STA or target STA the work subchannel to be switched to, CAP can be directed to each target STA, send channel-switch-announcement by way of unicast respectively.
As an alternative embodiment, the CAP starting channel numbers in channel-switch-announcement can be represented with 8 bits.
It is used as a kind of optional embodiment, work subchannel mappings in channel-switch-announcement can be realized with 4 bit bitmap, each bit indicates the presence or absence of work subchannel, wherein most 4Shi bit corresponds to the corresponding most 4Shi work subchannel of CAP band occupancy initial frequencies.Installing CAP work subchannel includes 4 sub-channels of 2.4G frequency ranges, and channel number is respectively 1,5,9 and 13, centre frequency point is another ' J is 2412MHz, 2432MHz, 2452MHz and 2472MHz.When the CAP starting channel numbers carried in channel-switch-announcement are 1, when work subchannel mappings information value is 0010, the subchannel 5 of frequency centered on the STA work subchannels to be switched to for 2432MHz is represented.Due to the channel number for using the electric committee of international wireless to specify in this mode, using less byte number with regard to energy one channel of unique mark, save resource and realize cylinder just.
It can also be carried in channel-switch-announcement such as the next item down or several optional informations：
1. channel mode.Channel mode can be 8 bits, and the limitation during instruction channel switching to transmission can for example indicate that STA stops data transfer before channel switching；
2. channel-switch count device.Channel-switch count device can be 8 bits, indicate to be switched to the target operation subchannel duration to be passed through from transmission channel-switch-announcement to STA, with broadcast message frame（BCF) interval is unit.Channel mode and channel-switch count device are used to constrain STA operation, and such as STA need to complete channel switchover operation according to the instruction of channel-switch count device in regulation duration.
3. CAP bandwidth of operation.CAP bandwidth of operation is used to indicate that the current bandwidth of operation of CAP is
20MHz, 40MHz or 80MHz, by the CAP bandwidth of operation information carried in channel-switch-announcement, CAP can change bandwidth of operation domain, STA can be in time adjusted after this information is known when itself bandwidth of operation is more than CAP bandwidth of operation.
4. the spectrum aggregating pattern between the two or more work subchannel that STA to be switched to.
Channel-switch-announcement can be encapsulated in channel-switch-announcement frame and realize, each information included in channel-switch-announcement, one field of correspondence in channel-switch-announcement frame, when filling in setting value in field, it can indicate whether the field carries the contents such as corresponding informance, the concrete meaning of information.
Fig. 4 is a kind of structural representation of channel-switch-announcement frame in the embodiment of the present invention, and wherein frame control field, reserved field and FCS fields are all with generally known implication.CAP bandwidth of operation field carries CAP bandwidth of operation, CAP starting channel number fields carry CAP starting channel numbers, work subchannel mappings field carrying work subchannel mappings, Channel Switch Mode field carries channel mode, and channel-switch count device field carries channel-switch count device.
Fig. 5 is the structural representation of another channel-switch-announcement frame in the embodiment of the present invention, and spectrum aggregating pattern field is added compared to Fig. 4.
Step 34:Perform channel switching.
In this step, STA need to complete channel switching in the regulation duration that channel-switch count device is indicated, while completing the conversion for the target STA frequencies communicated in the regulation duration that CAP need to also be indicated in channel-switch count device.
Further, if in step 32, CAP decision-makings will switch the work subchannel of oneself occupancy, then in this step, and in the regulation duration that channel-switch count device is indicated, CAP will also complete the switching of work subchannel.In this case, the flow shown in Fig. 3 also includes：
Step 35:CAP broadcast channel switching notices.
In this step, the work subchannel mappings carried in channel-switch-announcement indicate that CAP performs the work subchannel after channel switching.Work subchannel mappings and CAP originate the optional embodiment of channel number, identical with step 33.
Further, CAP bandwidth of operation can also be carried in channel-switch-announcement and/or indicates that CAP performs the spectrum aggregating pattern between the two or more work subchannel after channel switching.Application example two
Fig. 6 is that the channel in application example four of the present invention switches front and rear schematic diagram, and wherein dash area is
The subchannel that CAP or STA takes.
Before channel switching, CAP work subchannel is the channel 1 of 2.4G frequency ranges, and all STA for accessing the CAP also take the channel, and CAP bandwidth of operation and all STA bandwidth of operation are all
20MHz。
The CAP decision-makings subchannel that will work is switched to the channels 5 of 2.4G frequency ranges, and the bandwidth of operation of oneself keeps constant, and using all STA all as target STA, and the corresponding work subchannel of each target STA is channel 5.
CAP sends channel-switch-announcement by way of broadcast to all STA in this serving cell, the CAP starting channel numbers carried in the channel-switch-announcement indicate channel 5, the subchannel mappings that work are 0001, that is, indicate that all STA in this blunt business cell are switched to channel 5.
CAP and STA is performed after channel switching, and CAP work subchannel is channel 5, and all STA of this serving cell are resided on channel 5, and CAP bandwidth of operation and all STA bandwidth of operation keep constant.CAP, wherein the CAP starting channel numbers carried indicate that channel 5, work subchannel mappings are that 0001, bandwidth of operation indicates 20MHz, oneself current work subchannel and bandwidth of operation can be indicated to STA with broadcast channel switching notice.Application example three
Fig. 7 is that the channel in application example five of the present invention switches front and rear schematic diagram, and wherein dash area is
The subchannel that CAP or STA takes.
Before channel switching, CAP working channel is the channel 1 and channel 5 of 2.4G frequency ranges, and all STA are resided on channel 1 and channel 5.CAP bandwidth of operation and all STA bandwidth of operation are all 40MHz.
The work subchannel of itself is switched to channel 1 by CAP decision-makings, and the bandwidth of operation of itself is changed into
20MHz, and using all STA in this serving cell are as target STA and the corresponding work subchannels of each target STA are channel 1.
All STAs of the CAP by way of broadcast into this blunt business cell send channel-switch-announcement, the starting channel number carried in the channel-switch-announcement indicates channel 1, the subchannel mappings that work are 0001, that is, indicate that all STA in this serving cell are switched to channel 1.Target operation bandwidth is also carried in the channel-switch-announcement of CAP broadcast, indicates that CAP bandwidth of operation will be changed to 20MHz.
CAP and STA is performed after channel switching, and CAP work subchannel is channel 1, and all STA of this blunt business cell are resident on channel 1, and CAP bandwidth of operation and all STA of this serving cell bandwidth of operation change into 20MHz.CAP can be with broadcast channel switching notice, wherein the CAP carried is originated, channel number indicates channel 1, the subchannel mappings that work are that 0001, bandwidth of operation indicates 20MHz, to
STA indicates oneself current work subchannel and bandwidth of operation.Application example four
Fig. 8 is that the channel in application example six of the present invention switches front and rear schematic diagram, and wherein dash area is the subchannel that CAP or STA takes.
Before channel switching, CAP work subchannel is the channel 1 and channel 5 of 2.4G frequency ranges, and STA1 is resident on channel 1, and STA2 is resided on channel 5.CAP bandwidth of operation is 40MHz, and STA1 bandwidth of operation is 20MHz, and STA2 bandwidth of operation is 20MHz.
Assuming that present channel 1 and channel 5 are disturbed by the thousand of other wireless communication systems, CAP decision-makings itself are switched to the channel 9 and channel 13 of 2.4G frequency ranges, the bandwidth of operation of itself is constant, and is that channel 9, the corresponding work subchannels of STA2 are channel 13 as target STA and the corresponding work subchannels of STA1 using STA1 and STA2.
CAP sends channel-switch-announcement to STA1 and STA2 respectively by way of unicast, the CAP starting channel numbers carried in the channel-switch-announcement for being wherein sent to STA1 indicate channel 9, the subchannel mappings that work are 0001, the CAP starting channel numbers carried in the channel-switch-announcement for being sent to STA2 indicate channel 9, and the value of working channel map information is 0010.
CAP, STAl and STA2 are performed after channel switching, and CAP work subchannel is channel 9 and channel 13, and STA1 is resided on channel 9, and STA2 is resided on channel 13.CAP bandwidth of operation and STA1 and STA2 bandwidth of operation keep constant.CAP, wherein the CAP starting channel numbers carried indicate that channel 9, work subchannel mappings are that 0011, bandwidth of operation indicates 40MHz, oneself current work subchannel and bandwidth of operation can be indicated to STA1 and STA2 with broadcast channel switching notice.Application example five
Fig. 9 is that the channel in application example seven of the present invention switches front and rear schematic diagram, and wherein dash area is the subchannel that CAP or STA takes.
Before channel switching, CAP work subchannel is channel 149, channel 153, channel 161 and the channel 165 of 5G frequency ranges, and STA1 is resided on channel 149 and channel 153, and STA2 is resided on channel 153.CAP bandwidth of operation is 80MHz, and STA1 bandwidth of operation is 40MHz, and STA2 bandwidth of operation is 20MHz.
Assuming that channel 149 and channel 153 are disturbed by the thousand of other wireless communication systems, CAP decision-makings itself do not perform channel switching, do not change the bandwidth of operation of itself, and it regard STA1 and STA2 as target STA, and the corresponding work subchannels of STA1 are channel 161 and channel 165, the corresponding work subchannels of STA2 are channel 165.
CAP sends channel-switch-announcement to STA1 and STA2 respectively by way of unicast, the CAP starting channel numbers carried in the channel-switch-announcement for being wherein sent to STA1 indicate channel 149, the subchannel mappings that work are 1100, the CAP starting channel numbers carried in the channel-switch-announcement for being sent to STA2 indicate channel 149, and work subchannel mappings are 0001.
Perform after channel switching, STA1 is resided on channel 161 and channel 165, and STA2 is resided on channel 165.CAP bandwidth of operation and STA1 and STA2 bandwidth of operation keep constant.Application example six
Figure 10 is that the channel in application example eight of the present invention switches front and rear schematic diagram, and wherein dash area is the subchannel that CAP or STA takes.
Before channel switching, CAP work subchannel is channel 149, channel 153, channel 161 and the channel 165 of 5G frequency ranges, STA1 is resided on channel 149, channel 153, channel 161 and channel 165, and STA2 is resided on channel 149 and channel 153.CAP bandwidth of operation is 80MHz, STAl
Bandwidth of operation be 80MHz, STA2 bandwidth of operation is 40MHz.
Assuming that channel 153 is disturbed by the thousand of other wireless communication systems, CAP is determined temporarily without using the channel, that is CAP selects discontinuous channel 149, channel 161 and channel 165 to be used as work subchannel, CAP does not change the bandwidth of operation of itself, and it regard STA1 and STA2 as target STA, and the corresponding work subchannels of STA1 are channel 149, channel 161 and channel 165, the corresponding work subchannels of STA2 are channel 161 and channel 165.
CAP sends channel-switch-announcement to STA1 and STA2 unicasts respectively, the CAP starting channel numbers carried in the channel-switch-announcement for being wherein sent to STA1 indicate channel 149, the subchannel mappings that work are 1101, the CAP starting channel numbers carried in the channel-switch-announcement for being sent to STA2 indicate subchannel 149, and work subchannel mappings are 0011.
CAP, STA1 and STA2 are performed after channel switching, and STA1 is resided on channel 149, channel 161 and channel 165, and STA2 is resided on channel 161 and channel 165.CAP bandwidth of operation and STA1 and STA2 bandwidth of operation keep constant.CAP can be with broadcast channel switching notice, the CAP starting channel numbers wherein carried indicate that channel 149, work subchannel mappings are that 1101, bandwidth of operation indicates 80MHz, and oneself current work subchannel and bandwidth of operation are indicated to STA 1 and STA2.Figure 11 is is used for the structural representation for the device that channel switches in the embodiment of the present invention, the device includes：Generation unit 111 and transmitting element 112.
Generation unit 111, the channel-switch-announcement of work subchannel mappings and starting channel number is carried for generating.Wherein, the work subchannel mappings indicate the presence or absence of multiple work subchannels, and the minimum work subchannel in the multiple work subchannel is the corresponding minimum work subchannel of network side band occupancy initial frequency；The starting channel number indicates the channel number of the corresponding minimum work subchannel of network side band occupancy initial frequency.
Transmitting element 112, for sending the channel-switch-announcement.
It is used for the device that channel switches in the embodiment of the present invention, it can serve to indicate that terminal carries out channel switching, the work subchannel mappings that now channel-switch-announcement is carried indicate the work subchannel that target terminal will be switched to, the channel number that channel number indicates the corresponding minimum work subchannel of network side band occupancy initial frequency is originated, then target terminal performs channel switching by this parameter.
It is used for the device that channel switches in the embodiment of the present invention, all terminals from the work subchannel of itself to serving cell that can also be after network side switches circulate a notice of this switching result, the work subchannel mappings that now channel-switch-announcement is carried indicate that network side performs the work subchannel after channel switching, and starting channel number indicates the channel number of the corresponding minimum work subchannel of network side band occupancy initial frequency.
Channel-switch-announcement, work subchannel mappings and the starting channel number being related in the embodiment of the present invention, its optional embodiment have been described in detail in method above, repeated no more here.
Being given below in the embodiment of the present invention is used for the several application examples for the device that channel switches.Application example seven
In this application example seven, it is located at for the device that channel switches in CAP.
Figure 12 is is used for the structural representation for the device that channel switches in application example seven of the present invention, the device includes：Generation unit 121, transmitting element 122, determining unit 123 and handover decisions unit 124.
Generation unit 121, the channel-switch-announcement of work subchannel mappings and CAP starting channel numbers is carried for generating.Wherein, the work subchannel mappings indicate the presence or absence of multiple work subchannels, and the minimum work subchannel in the multiple work subchannel is the corresponding minimum work subchannel of CAP band occupancy initial frequencies；The CAP startings channel number indicates the channel number of the corresponding minimum work subchannel of CAP band occupancy initial frequencies.
Transmitting element 122, for sending the channel-switch-announcement.
Determining unit 123, the channel quality for determining each work subchannel that network side takes.Specifically, it is determined that unit 123 can determine the channel quality for each work subchannel that network side takes by two ways.The first, determining unit 123 can be by receiving the channel measurement that each STA is sent, to determine the channel quality for each work subchannel that CAP takes.Second, determining unit 123 can measure the channel quality of CAP sides, to determine the channel quality for each work subchannel that CAP takes.
Handover decisions unit 124, the channel quality for being obtained according to determining unit 123 carries out channel handover decisions.
Specifically, when determining unit 123 receives the channel measurement of STA transmissions, handover decisions unit 124 is directed to each channel measurement received, if the channel measurement that terminal is reported indicates that the channel quality for the work subchannel that the terminal takes is less than the first given threshold, using the terminal as target terminal, and it is the target terminal selection work subchannel to be switched to from other work subchannels and/or new available subchannels of channel quality higher than the first given threshold of network side occupancy.
When the channel quality of the direct measurement CAP sides of determining unit 123, channel quality is selected the work subchannel to be switched to by handover decisions unit 124 as target STA, and from other work subchannels and/or new available subchannels of channel quality higher than the second given threshold of CAP occupancy less than the STA in the work subchannel of the second given threshold for target STA.
Handover decisions unit 124 for target STA select the work subchannel to be switched to when, can also further combined with channel loading and/or target STA business demand.Specific combination has been described in detail in method application example, repeats no more here.
Further, handover decisions unit 124 will select the work subchannel to be switched to from CAP other work subchannels taken and/or new available subchannels for network side.
Further, handover decisions unit 124 determines the target operation bandwidth of network side.
It should be understood that the particular order or level the step of during disclosed are the examples of illustrative methods.Based on design preference, it should be appreciated that during the step of particular order or level can be rearranged in the case where not departing from the protection domain of the disclosure.Appended claim to a method gives the key element of various steps with exemplary order, and not to be limited to described particular order or level.
In above-mentioned detailed description, various features are combined in single embodiment together, with the cylinder disclosure.This open method should not be construed to reflect such intention, i.e. the embodiment of theme claimed needs spies more more than the feature clearly stated in each claim
Levy.On the contrary, as the following claims reflect, the present invention is in the state fewer than whole features of disclosed single embodiment.Therefore, appended claims is hereby expressly incorporated into detailed description, and wherein each claim is alone as the single preferred embodiment of the present invention.
Described above includes the citing of one or more embodiments.Certainly, it is impossible part or all possible combination of method to be described to describe above-described embodiment, but it will be appreciated by one of ordinary skill in the art that each embodiment can do further combinations and permutations.Therefore, embodiment described herein is intended to all such changes, modifications and variations fallen within scope of appended claims.In addition, with regard to the term " including " used in specification or claims, the word covers mode similar to term " including ", is connect in the claims as # as word explains just as " including, ".In addition, using in the specification of claims any one term " or " be to represent " non-exclusionism or ".
Claims (24)
- Claims1. a kind of method switched for channel, it is characterised in that this method includes：Generation carries the channel-switch-announcement of work subchannel mappings and starting channel number；Send the channel-switch-announcement；Wherein, the work subchannel mappings indicate the presence or absence of multiple work subchannels, and the minimum work subchannel in the multiple work subchannel is the corresponding minimum work subchannel of network side band occupancy initial frequency；The starting channel number indicates the channel number of the corresponding minimum work subchannel of network side band occupancy initial frequency.2. the method as described in claim 1, it is characterised in that the work subchannel mappings are realized with bitmap bitmap, wherein each bit is an indicating bit, each indicating bit is used to indicate the presence or absence of work subchannel.3. the method as described in claim 1, it is characterised in that the work subchannel that the work subchannel mappings are indicated is the target terminal work subchannel to be switched to, and the channel-switch-announcement unicast or broadcast is sent to the target terminal.4. method as claimed in claim 3, it is characterised in that ^ mouthfuls of the next item downs or several are also carried in the channel-switch-announcement：Indicate the channel mode to the limitation of transmission during channel switching；Indicate from the channel-switch count device for sending channel-switch-announcement to the setting duration for being switched to work subchannel；The target operation bandwidth of network side；The spectrum aggregating pattern for the two or more work subchannel that the work subchannel mappings are indicated.5. the method as described in claim 1, it is characterised in that the work subchannel indicates that network side performs the work subchannel after channel switching, and the channel-switch-announcement broadcasts to all terminals.6. method as claimed in claim 5, it is characterised in that the spectrum aggregating pattern between the work at present bandwidth of network side and/or the two or more work subchannel of work subchannel mappings instruction is also carried in the channel-switch-announcement.7. the method as described in claim 1, it is characterised in that also include：Determine the channel quality for each work subchannel that network side takes；Channel handover decisions are carried out according to the channel quality.8. method as claimed in claim 7, it is characterised in that the channel quality for each work subchannel that the determination network side takes is：Receive the channel measurement that each terminal is sent；The channel handover decisions include：For each channel measurement received, if the channel measurement that terminal is reported indicates that the channel quality for the work subchannel that the terminal takes is less than the first given threshold, using the terminal as target terminal, and it is the target terminal selection work subchannel to be switched to from other work subchannels and/or new available subchannels of channel quality higher than the first given threshold of network side occupancy.9. method as claimed in claim 7, it is characterised in that the channel quality for each work subchannel that the determination network side takes is：Channel quality is measured in network side；The channel handover decisions include：Channel quality is less than to the terminal in the work subchannel of the second given threshold as target terminal, and is the target terminal selection work subchannel to be switched to from other work subchannels and/or new available subchannels of channel quality higher than the second given threshold of network side occupancy.10. method as claimed in claim 8 or 9, it is characterised in that when selecting the work subchannel to be switched to for the target terminal, further combined with the business demand of channel loading and/or target terminal.11. method as claimed in claim 8 or 9, it is characterised in that the channel handover decisions further comprise：In other work subchannels and/or new available subchannels for being taken from network side the work subchannel to be switched to is selected for network side.12. method as claimed in claim 11, it is characterised in that the channel handover decisions further comprise：Determine the target operation bandwidth of network side.13. a kind of device switched for channel, it is characterised in that the device includes：Generation unit, the channel-switch-announcement of work subchannel mappings and starting channel number is carried for generating；Transmitting element, for sending the channel-switch-announcement；Wherein, the work subchannel mappings indicate the presence or absence of multiple work subchannels, and the minimum work subchannel in the multiple work subchannel is the corresponding minimum work subchannel of network side band occupancy initial frequency；The starting channel number indicates the channel number of the corresponding minimum work subchannel of network side band occupancy initial frequency.14. device as claimed in claim 13, it is characterised in that the work subchannel mappings are realized with bitmap bitmap, wherein each bit is an indicating bit, each indicating bit is used to indicate the presence or absence of work subchannel.15. device as claimed in claim 13, it is characterised in that the work subchannel that the work subchannel mappings are indicated is the target terminal work subchannel to be switched to；Channel-switch-announcement unicast or broadcast is sent to the target terminal by the transmitting element.16. device as claimed in claim 15, it is characterised in that the generation unit further carries such as the next item down or several in the channel-switch-announcement：Indicate the channel mode to the limitation of transmission during channel switching；Indicate from the channel-switch count device for sending channel-switch-announcement to the setting duration for being switched to work subchannel；The target operation bandwidth of network side；The spectrum aggregating pattern for the two or more work subchannel that the work subchannel mappings are indicated.17. device as claimed in claim 13, it is characterised in that the work subchannel indicates that network side performs the work subchannel after channel switching, and the channel-switch-announcement broadcasts to all terminals.18. device as claimed in claim 17, characterized in that, the spectrum aggregating pattern between the two or more work subchannel that work at present bandwidth and/or the work subchannel mappings that the generation unit further carries network side in channel-switch-announcement are indicated.19. device as claimed in claim 13, it is characterised in that the device also includes：Determining unit, the channel quality for determining each work subchannel that network side takes；Handover decisions unit, for blunt according to channel quality progress channel handover decisions.20. device as claimed in claim 19, it is characterised in that the determining unit receives the channel measurement that each terminal is sent, to determine the channel quality for each work subchannel that network side takes；The handover decisions unit is directed to each channel measurement received, if the channel measurement that terminal is reported indicates that the channel quality for the work subchannel that the terminal takes is less than the first given threshold, using the terminal as target terminal, and it is the target terminal selection work subchannel to be switched to from other work subchannels and/or new available subchannels of channel quality higher than the first given threshold of network side occupancy.21. device as claimed in claim 19, it is characterised in that the determining unit measures channel quality in network side, to determine the channel quality for each work subchannel that network side takes；Channel quality is the target terminal selection work subchannel to be switched to as target terminal, and from other work subchannels and/or new available subchannels of channel quality higher than the second given threshold of network side occupancy less than the terminal in the work subchannel of the second given threshold by the handover decisions unit.22. the device as described in claim 20 or 21, it is characterised in that the channel decision unit for the target terminal when selecting the work subchannel to be switched to, further combined with the business demand of channel loading and/or target terminal.23. the device as described in claim 20 or 21, it is characterised in that select the work subchannel to be switched in other work subchannels and/or new available subchannels that the handover decisions unit further takes from network side for network side.24. device as claimed in claim 23, it is characterised in that the handover decisions unit further determines that the target operation bandwidth of network side.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610104553.0A CN105636134A (en) | 2012-08-03 | 2012-08-03 | Channel switching method |
| CN201280013188.2A CN103609165B (en) | 2011-08-05 | 2012-08-03 | method and device for channel switching |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201110224711.3A CN102917428B (en) | 2011-08-05 | 2011-08-05 | Channel switching method and device |
| CN2011102247113 | 2011-08-05 | ||
| CN201110224711.3 | 2011-08-05 | ||
| CN201210034419.X | 2012-02-15 | ||
| CN201210034419X | 2012-02-15 | ||
| CN201210034419 | 2012-02-15 | ||
| CN201280013188.2A CN103609165B (en) | 2011-08-05 | 2012-08-03 | method and device for channel switching |
| PCT/CN2012/079645 WO2013020483A1 (en) | 2011-08-05 | 2012-08-03 | Method and device for use in channel handover |
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| CN201610104553.0A Division CN105636134A (en) | 2012-08-03 | 2012-08-03 | Channel switching method |
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| CN1572086A (en) * | 2000-09-15 | 2005-01-26 | 皇家菲利浦电子有限公司 | Dynamic channel selection scheme for ieee 802.11 WLANs |
| US20080268887A1 (en) * | 2007-02-26 | 2008-10-30 | Nokia Corporation | Multipoint data transmission |
| CN101521879A (en) * | 2008-02-27 | 2009-09-02 | 华为技术有限公司 | Wireless channel switching method and system therefor |
| WO2011093642A2 (en) * | 2010-01-26 | 2011-08-04 | 엘지전자 주식회사 | Station operation method and apparatus in tv whitespace |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1572086A (en) * | 2000-09-15 | 2005-01-26 | 皇家菲利浦电子有限公司 | Dynamic channel selection scheme for ieee 802.11 WLANs |
| US20080268887A1 (en) * | 2007-02-26 | 2008-10-30 | Nokia Corporation | Multipoint data transmission |
| CN101521879A (en) * | 2008-02-27 | 2009-09-02 | 华为技术有限公司 | Wireless channel switching method and system therefor |
| WO2011093642A2 (en) * | 2010-01-26 | 2011-08-04 | 엘지전자 주식회사 | Station operation method and apparatus in tv whitespace |
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