CN103548371A - Dynamic bandwidth control of channels for co-existence of network - Google Patents

Abstract

The present invention is directed to a communication system comprising a network configured to operate in a first band; and a communication device of the network configured to send in a notification period a notification signal indicating that the first band is occupied and a notification signal indicating that a second band is occupied, wherein the second band includes the first band or a part thereof. A method of coordinating operations of networks is also disclosed.

Description

The dynamic bandwidth of the channel for network coexisted is controlled

The cross reference of related application

The application " controls MAC agreement (Dynamic Bandwidth Control MAC Protocols for Co-existence of Networks) for network coexisted dynamic bandwidth " with reference to the application case of submitting on March 8th, 2011 " the MAC agreement (A MAC Protocol for Dynamic Bandwidth Control) of controlling for dynamic bandwidth " and the application case submitted on June 15th, 2011 and also advocates the benefit of priority of these two application cases, that these two application case Jun Shixiang Singapore Department of Intellectual Property submit to and formally authorized application number 201101650-8 and 201104372-6.

Technical field

Each embodiment relates in general to the field of controlling for the dynamic bandwidth of the channel of network running, in particular to the channel to for network coexisted, carry out the media access control agreement (Medium Access Control protocol) of dynamic bandwidth control.

Background technology

There is at present different wireless technologys, their all (for example, in 60GHz frequency band (being DBand)) runnings in band (unlicensed spectrum band) is authorized in identical exempting from.Designed manyly for the standardized technique of working in DBand or by standardized technology, comprised IEEE802.11ad, standardization IEEE802.15.3c and standardization ECMA-387.

In addition Chinese wireless personal domain network (China Wireless Personal Area Network; CWPAN) be according to China national information technology standard (China National Information Technology Standardization; NITS) Chinese Industrial Standards (CIS) working group, it is as Chinese wireless personal domain network (wireless personal area network; WPAN) stipulated the specification that operates within the scope of 60GHz.Yet, at China and Australian issued 60GHz spectrum much smaller than the spectrum in other countries.For example, the 60GHz spectrum of issuing in China has covered 2 channels corresponding with the channel 2 using in IEEE802.11ad and channel 3, and only corresponding with the channel 2 using in IEEE802.11ad at the 60GHz spectrum of Australia's issue.

For the number of logic channel is increased, need to be at media access control (Medium Access Control; MAC) layer place splits into the channel with less bandwidth by channel.In the situation that channel is divided into less channel, needs the running of coordinating heterogeneous networks in shared band badly and coexist to realize.

MAC agreement generally includes the use of IEEE802.11MAC beacon interval.

Fig. 1 shown as defined in the IEEE P802.11ad/D2.0 standard in March, 2010 " the 11st part: WLAN media access control (MAC) and physical layer (PHY) specification amendment 5: improve the high throughput (Part11:Wireless LAN Medium Access Control (MAC) and Physical Layer (PHY) Specifications Amendment5:Enhancements for Very High Throughput in the60GHz band) in 60GHz frequency band " by BTI, A-BFT, AT, and two CBAP and two beacon interval (beacon interval that SP forms in DTT, BI) example of structure.

Beacon interval 100 in IEEE802.11ad MAC is divided into 4 parts substantially:

Beacon transmission interval (Beacon transmission interval; BTI) 104

United beam moulding training (Association beamforming training; A-BFT) 106

Bulletin time (Announcement time; AT) 108

Data transmission period (data transfer time; DTT) 102

During beacon transmission interval (BTI) 104, individual Basic Service Set central point (personal basic service set sentral point; PCP)/access point (access point; AP) via the different accurate omnidirectionals of section transmit one or more DBand beacon frames (beacon frame).Beacon frame is carrying network management information.Beacon frame is network enabled synchronization function also.

Beacon frame is used as at PCP/AP and the non-AP of non-PCP/ station (station; STA) between, carry out the training frames of beam forming.For adding network, STA scans and proceed together with PCP/AP in A-BFT beam forming to be processed beacon, and then AT108 or the access period CBAP110 based on competition, 116 during in combine with PCP/AP.

United beam moulding training (A-BFT) the 106th carry out initial beam moulding training between PCP/AP and the non-AP STA of non-PCP/.A-BFT106 is divided into time slot to allow the making non-AP STA of a plurality of non-PCP/ carry out beam forming simultaneously together with PCP/AP in same A-BFT106.

During the bulletin time (AT) 108, can carry out the management access based on request-response between PCP/AP and the non-AP STA of non-PCP/.PCP/AP in data transmission period (DTT) 102, CBAP110, CBAP116 and the seeervice cycles (SP) 112 is distributed and seeervice cycles (SP) 114 distribution arranges.

During data transmission period (DTT) 102, during CBAP110, CBAP116 and SP112, SP114 in any frame all may occur, comprise application data frame transmission.Access in during CBAP110, CBAP116 be take modified model IEEE802.11EDCA running (it has carried out fine setting for beam communication) for basic.Access in during SP112, SP114 is arranged and is assigned to specific station.

When expectation CWPAN network is used identical frequency band with other DBand network (DBand network), there will be coexistence problems.According to the dynamic bandwidth control technology of considering in CWPAN, large frequency band can split into two little frequency bands to hold two different CWPAN networks simultaneously.In this kind of situation, want to take the network of the other types of current large frequency band can not be in this large frequency band any accurate omnidirectional range frame of CWPAN network uppick (quasi-omni beacon frame) from operating little frequency band, if this problem can not get alleviating, can cause interference.Equally, in thering are some technology of the band channel different from existing DBand technology, channel occupancy be designated as some part of the frequency band that defines of the channel of existing DBand network, so these technology will face similar problem.

Therefore, need to provide a kind of and can realize high data rate service and can minimize the MAC agreement that (or avoiding) disturbs at the channel for network coexisted, thereby try hard to solve at least the problems referred to above.

Summary of the invention

In first aspect, the present invention relates to a kind of communication system, described communication system comprises: network, in order to operate in the first frequency band; And the communicator of described network, in order to send and to be used to indicate the occupied notification signal of described the first frequency band and to be used to indicate the occupied notification signal of the second frequency band in announcement period, the second frequency band described here comprises a part for described the first frequency band or described the first frequency band.

According to second aspect, the present invention relates to a kind of communicator of network, described communicator comprises: reflector, in order to utilize the second frequency band or the first frequency band to transmit data in data transfer cycle; Transceiver, in order to send and to be used to indicate the occupied notification signal of described the first frequency band and to be used to indicate the occupied notification signal of described the second frequency band in announcement period; And controller, in order to running is switched to described the second frequency band or switches to described the first frequency band from described the second frequency band from described the first frequency band, to send, be used to indicate the occupied described notification signal of described the first frequency band and be used to indicate the occupied described notification signal of described the second frequency band.

In the third aspect, the present invention relates to a kind of method of coordination network running, described method comprises: in the first frequency band, operate network; And send and be used to indicate the occupied notification signal of described the first frequency band and be used to indicate the occupied notification signal of the second frequency band in announcement period, the second frequency band described here comprises a part for described the first frequency band or described the first frequency band.

Accompanying drawing explanation

In the accompanying drawings, identical reference symbol identical parts of general expression in all different views.Accompanying drawing may not be drawn in proportion, but generally focuses on and exemplify principle of the present invention.For clarity, the size of various feature/elements may at random be expanded or dwindled.In the following description, with reference to the following drawings, set forth various embodiments of the present invention.Accompanying drawing is as described below.

Fig. 1 shown as defined in the IEEE P802.11ad/D2.0 standard in March, 2010 " the 11st part: WLAN media access control (MAC) and physical layer (PHY) specification amendment 5: improve the high throughput (Part11:Wireless LAN Medium Access Control (MAC) and Physical Layer (PHY) Specifications Amendment5:Enhancements for Very High Throughput in the60GHz band) in 60GHz frequency band " by the beacon time interval (BTI), the united beam moulding training time (A-BFT), the bulletin time (AT), and the example of beacon interval (BI) structure that forms of in data transmission period (DTT) two cycles (CBAP) based on competition and two seeervice cycles (SP).

Fig. 2 has shown the exemplary summary of media access control (MAC) protocols/specifications according to each embodiment.

Fig. 3 (a) has shown according to the schematic depiction of the communication system of each embodiment.

Fig. 3 (b) has shown according to the schematic block diagram of the communication system of each embodiment.

Fig. 4 has shown according to the schematic block diagram of the communicator of each embodiment.

Fig. 5 has shown the frequency band drawing of controlling MAC technology according to the dynamic bandwidth of each embodiment.

Fig. 6 has shown the example of individual Basic Service Set central point/access point (PCP/AP) problem of hiding.

Fig. 7 (a) has shown according to each embodiment, the PCP/AP1 operating in large frequency band and the station (STA) that adds the network of PCP/AP1 or has installed (if successfully started new network in little frequency band, described station or device hereinafter referred to as PCP/AP2) example, and request the existing large channel being used by existing network is split into two networks that operate in two less frequency bands.

Fig. 7 (b) has shown according to the virtual beacon interval of having of each embodiment (virtual beacon interval; VBI) and little frequency band beacon interval (small band beacon interval; The example of MAC structure SBBI).

Fig. 7 (c) shown according to each embodiment, and in detecting adjacent little frequency band, during without the network of PCP/AP2, how PCP/AP1 becomes the example of large frequency band to operate by its network bandwidth from little band spreading.

Fig. 8 (a) has shown the DBand beacon frame form of the frame sending in can be used in during NP according to each embodiment.

Fig. 8 (b) has shown the DBand beacon frame main body according to each embodiment.

Fig. 8 (c) has shown according to the beacon interval for the frame that sends in during NP of each embodiment and has controlled.

Fig. 8 (d) has shown the bitmap field form (Bitmap field format) according to the channel width of the CWPAN of each embodiment.

Fig. 9 has shown according to the schematic block diagram of a kind of coordination network How It Works of each embodiment.

Embodiment

With reference to accompanying drawing, carry out following detailed description, accompanying drawing has been shown and can have been put into practice detail of the present invention and embodiment by illustrative mode.Those skilled in the art enough at length sets forth these embodiment so that can put into practice the present invention.Can adopt in the case without departing from the scope of the present invention other embodiment and can be in structure and make in logic change.Each embodiment may not repel mutually, and this is because some embodiment can combine to form new embodiment with one or more other embodiment.

For making the present invention can easy to understand and actual reaching, now will be by way of example and unrestriced mode is set forth specific embodiment with reference to accompanying drawing.

Fig. 2 has shown the exemplary summary of media access control (MAC) protocols/specifications 200, MAC protocols/specifications 200 comprises the protocols/specifications for following aspect: divide or division channel (or frequency band) 202, combination or merging channel (or frequency band) 204, network running is moved to one other channel (or frequency band) 206 from a channel (or frequency band), communication terminal adds the existing network 208 in channel, communication terminal starts new network 210 in channel, by shared spectrum, bring the transmission 212 of notice coordinate signal, make the notification signal fidelity 214 in shared band, and make silence period in network in each channel synchronous 216.

Agreement can be referred to as program.Channel can be referred to as frequency band.

MAC agreement 200 can be supported the logic channel (frequency band) than the higher number of number of available large channel, and can when channel is available, according to frequency band plans, start network.

In addition, dividing or division channel (or frequency band) 202 o'clock, large channel (or frequency band) can be divided into many little channels (or frequency band), i.e. logic channel, so that many networks can be changed into and can operate.Term used herein " large channel (large channel) " and " little channel (small channel) " are relative.Large channel has the bandwidth wider than the bandwidth of little channel in essence.For example, the bandwidth of large channel can be but is not limited to the twice (or double) of the bandwidth of little channel or for three times of the bandwidth of little channel or for four times of the bandwidth of little channel or be five times of the bandwidth of little channel etc.

Term " logic channel " refers to physical channel or can be associated with physical channel.For example, term " logic channel " can be used for distinguishing independent data flow, and in traditional sense, these independent data flow are logically equivalent to channel.

Combining or merging channel (or frequency band) 204 o'clock, in the time can realizing higher data rate, just carry out the combination of some little channels to form large channel.For example, this can work as another network operating in little frequency band and occurs while decommissioning.

In addition,, in the time can realizing higher data rate, just carry out the combination of some large channels to form larger channel.For example, this can work as when another network operating in large channel decommissions and occurs.

Want the communication terminal or the network equipment that in channel, come into operation in described channel, to same type or dissimilar existing network, (for example to survey, as in the agreement of existing network 208 that adds channel for communication terminal), and communication terminal (for example starts new network in channel, as started in the agreement of new network 210 at channel for communication terminal) and can add this existing network or (for example move to another channel, as for network running is moved to the agreement of another channel (or frequency band) 206 from a channel (or frequency band)).

Communication terminal or network equipment can also be avoided any potential interference to existing network when new network equipment will start the running of new network.For example, in the agreement of the band for shared via the transmission 212 of accurate omnidirectional range cycle notice coordinate signal, can avoid in shared band or having that device can operate other specify in bands because of the contingent conflict of the communication between the device in heterogeneous networks.In this context, shared band can be called as shared band channel.

For making in the agreement of notification signal fidelity 214 of shared band, in the network operating, can set up silence period in other channel light bands of a spectrum, in described silence period, the device in their networks has separately suspended all transmission in the band of they networks separately temporarily.

For making silence period in network in the agreement of each channel synchronous 216, can by shared band or having that device can operate other specify the communication between the device in heterogeneous networks in bands to realize following object: when two or more Network Synchronization runnings, the silence period synchronization of separate network.

In first aspect, as shown in Fig. 3 (a) and Fig. 3 (b), provide a kind of communication system.In Fig. 3 (a), communication system 300 comprises: network 302, in order to operate in the first frequency band; And the communicator 306 of network 302, in order to send and to be used to indicate the occupied notification signal of described the first frequency band and to be used to indicate the occupied notification signal of the second frequency band in announcement period, wherein the second frequency band comprises a part for the first frequency band or the first frequency band.

For example, the first frequency band can be but is not limited to the frequency band 304 of Fig. 3 (a).The second frequency band can be but is not limited to the frequency band 310 of Fig. 3 (a).

Another network 312 also can for example, operate in the second frequency band (frequency band 310 of Fig. 3 (a)).Device 314 can wish to operate in the second frequency band, for example, in the second frequency band, start new network.

In the context of each embodiment, term " communication system " refers to the system that communication service is provided for device herein.Communication system can be communication or the telecommunication system of any type that can carry out wireless or wired information transmission.In each embodiment, communication system 300 can be wireless.

Term " communicator " can refer to the machine for auxiliary data transmission (sending and/or receiving data information).Therefore, communicator also can be called as node conventionally.Communicator 306 for example can be but is not limited to station or mobile radio station (mobile station; MS) or substation (substation) or port or mobile phone or cellular phone or access point or individual Basic Service Set central point etc.

In one embodiment, communicator 306 can comprise access point or individual Basic Service Set central point or piconet coordinator (piconet coordinator).

A plurality of communicators can be called as a plurality of access points or a plurality of individual Basic Service Set central points or a plurality of piconet coordinator.In certain example, communicator can be non-access point or non-telegon.

Term used herein " network " typically refers to cordless communication network.For example, network 302 can be according to the communication network of 802.11 communication standards or CWPAN communication standard or DBand communication standard.Term " network " also comprises for information is transmitted to (or reception) to any method or the medium of another node from a node.Network 302 forms by the communication connection between node." communication connection " can refer to conventionally for linking that information transmits is being provided between a node and another node.In this context, term " DBand communication standard " or DBand network refer to the DBand existing in previous 802.11ad draft standard.

Term " network " can be referred to as " system " sometimes.

Term used herein " running " can refer to " working " or " work " or " communication ".

Term " frequency band " refers to the bandwidth of frequency.Term " frequency band " can be referred to as " channel ".In some instances, frequency band also can be called as channel band or band channel or band frequency or channel or frequency range.

For example, term " frequency band " or " channel " can refer to a part for whole system bandwidth or whole system bandwidth.In this context, by definitions of bandwidth, be the width of the frequency range (or frequency band) used on given transmission medium of electronic signal, described given transmission medium can be wireless medium.Bandwidth can be expressed as the difference between highest frequency signal component and low-limit frequency signal component.The first frequency band or the second frequency band also can be subchannel.

Term used herein " notification signal " refers to for informing or notify the signal of other devices." notification signal " refers to signal of communication.Notification signal can be message, and described message for example can be, from an entity (node) (communicator 306) and sends at least short message of another entity (node) (for example for example, another communicator another network (network 312)).Notification signal can be bag (packet) or bunch (cluster) or bag bunch.

For example, notification signal can comprise the data of the Accurate that is sent and received by node, and can represent request, report or event.Described notification signal can be contained in another signal or another notification signal, or may be encoded in another signal or another notification signal, or can in another signal or another notification signal, be instructed to out.

Term " transmission " can refer to but be not limited to transmission or broadcast.In this context, communicator 306 can comprise sending the transceiver of sound or data, services.In this context, term " transceiver " refers to composite type emitter/receiver.For example, transceiver can be reflector and the receiver that is combined into single package.Generally speaking, transceiver comprises transmitting and receives two kinds of abilities and function.

Term " broadcast " refers to from a node of top, region and sends out notification signal (it can be beacon), be sent to be arranged in described region whole or a plurality of communicators (for example utilize same radio communication technology, for example, according to same communication standard, and as the communication terminal of network or the part of this network identical with communicator)." a plurality of " used herein communicator can refer to communicator in network or the subset of terminal.

Term " announcement period " refer in communication protocol, distribute for sending the time period of notification signal.

Term used herein " indication " includes but not limited to regulation, shows, implies, discloses, notifies, announces or registration.

Term " occupied " refers to the frequency band that at least one network operates therein.In some context, term " occupied " can be called as " wearing " or " unavailable ".

Each embodiment can relate to dynamic bandwidth and control media access control (MAC) agreement, described agreement solves the coexistence problems of the network operating at overlapping spectral band for the accurate omnidirectional range frame by circulation (recurring), with the message that network is existed, announce to wanting and in sharing access spectral band (common access frequency spectrum band), start the consolidated network type of network running or another new traffic terminal of different network type (or device).After learning that existing network is operating, device can (for example be used number of mechanisms according to its ability, the MAC agreement 200 of Fig. 2) alleviate the interference between network, for example running (is for example switched to other frequency bands, Fig. 2 for network running is moved to the agreement of one other channel (or frequency band) 206 from a channel (or frequency band)), add existing network (for example, Fig. 2's adds the agreement of the existing network 208 of channel for communication terminal), utilize spatial beams moulding or only postpone transmission.

About device, add existing network, described device can add the existing network in band sharing, or can be added in reside in band sharing or with the overlapping channel band of band sharing in one in the existing network that operates.Alternatively, if can, first device can add the existing network in band sharing, and request (for example becomes two little frequency bands by the current band splitting taking of existing network, the agreement for division or division channel (or frequency band) 202 of Fig. 2), to start alone new network.This new equipment can be consolidated network type with existing network, or this new equipment can with frequency band in existing network be different network type.For surveying by another existing network of adjacent little frequency band, in little frequency band, there is not existing network and all the other existing networks expand in this little frequency band with can be the same with the agreement for combination or merging channel (or frequency band) 204 of Fig. 2 by band recovery to the MAC agreement that shares band.In addition, the interference that the object of the invention is to avoid to want other potential networks of starting in sharing band to cause, described shared band is just being taken by the network operating in little frequency band.

As described herein, the 60GHz frequency band of exempting to authorize is used as to exemplary and non-limiting case study.The MAC agreement 200 that comprises various embodiments of the present invention that However, it should be understood that Fig. 2 can easily extend to the similar network running of having of any frequency band other use a model.

In each embodiment, the communicator 306 of network 302 can be configured to running to switch to the second frequency band from the first frequency band, or switch to the first frequency band from the second frequency band, to send, be used to indicate the occupied notification signal of the first frequency band and be used to indicate the occupied notification signal of the second frequency band.

Term used herein " switching " can refer to change between two states.This switching can depend on various devices and network in communication system needs or can for example, according to agreement (the MAC agreement 200 of Fig. 2).

In one embodiment, from the running of the first frequency band to the second frequency band or from the running of the second frequency band to the first frequency band capable of circulation carry out.This means that described switching can be reversible and/or can be repetition.

In one embodiment, the second frequency band can be shared band channel.

Term used herein " shared band channel " refers to the bandwidth of the frequency that the more than network in communication system is used.Only as illustrative example, if network A operates in special time in channel CH1, CH2 and CH3, and another network (network B) operates in another special time in channel CH4, CH2 and CH5, channel CH2 is the band sharing channel of network A and network B.

Term " shared band channel " can refer to wherein have a plurality of networks at channel or the channel of running.Shared band channel (for example frequency band 310) can comprise a plurality of channels and/or subchannel.For example, in communication system (communication system 300 of Fig. 3 (a) and Fig. 3 (b)), can there is a more than shared band channel.In shared band channel, can there is the channel with overlapping frequency band.

In this embodiment, announcement period can comprise the circulation timei of being followed the trail of in the second frequency band by timer (timer).

Term used herein " circulation timei " has referred to the time that one or more circulations are needed or measured.Timer is device (hardware) or the algorithm (software program) for monitoring and follow the trail of the time.For example, timer can be internal clocking or the timer of communication system.

In different embodiment, the first frequency band can be shared band channel.Announcement period can comprise the circulation timei of being followed the trail of in the first frequency band by timer.

In each embodiment, the communicator of network can be formed in protection interval (guard interval) running is switched to the second frequency band or switches to the first frequency band from the second frequency band from the first frequency band.

In the context of each embodiment, term " protection interval " is the time period, during this time period in, device does not carry out transfer of data in network separately.

In each embodiment, a plurality of devices of network can be formed in data transfer cycle and utilize and have the first frequency band or the second frequency band that network operates therein to transmit data.In " data transfer cycle ", can in network separately, carry out transfer of data by device.

In certain embodiments, the communicator 306 of network 302 can be configured to described a plurality of devices in network 302 and in silence period, suspend when the first frequency band separately or the transfer of data in the second frequency band, sends and is used to indicate the occupied notification signal of the first frequency band and is used to indicate the occupied notification signal of the second frequency band.

Term used herein " silence period (quiet period) " can refer to the time period that wherein occurs that transfer of data is interrupted.In other words, there is the interim time-out of transfer of data.For example, silence period can comprise announcement period.

In each embodiment, communication system 300 also can comprise: another network, in order to operate in the 3rd frequency band; And the communicator of described another network, in order to send and to be used to indicate the occupied notification signal of described the 3rd frequency band and to be used to indicate the occupied described notification signal of described the second frequency band in another announcement period, the second frequency band comprises a part for the 3rd frequency band or the 3rd frequency band here.

For example, described another network can be the network 312 of Fig. 3 (a).

Term " network ", " running ", " frequency band " " communicator ", " notification signal ", " indication " and " announcement period " are as hereinbefore defined.

In an example, network and another network can be same type.In another example, network and another network can be dissimilar." type (type) " of network can define by the communication standard by network using.For example, network can be CWPAN type or DBand type.The network of same type can be CWPAN network and another CWPAN network in frequency band.By contrast, dissimilar network can be CWPAN network and the DBand network in frequency band.Term " DBand network " as hereinbefore defined.

In each embodiment, network 302 and/or another network 312 all can comprise Chinese wireless personal domain network (CWPAN) network.In some instances, network 302 and/or another network 312 all can comprise DBand network.

In each embodiment, announcement period and another announcement period are the continuous cycles.

Term used herein " continuous " for set forth one and then another.In an example, continuous announcement period and another announcement period are can part overlapping.In another example, between continuous announcement period and another announcement period, can there is gap.

In each embodiment, the notification signal of described another network comprises for making the timestamp of described another network and described Network Synchronization.

Term used herein " timestamp " can be used for item of information instruction time (for example date or time), described temporal information item is for defining the time (or temporary position) that initial point with given time reference is relevant and be associated with the part of signal (for example,, such as the data units such as image, one group of data).Be only illustrative object, for example, in video sequence, timestamp can with each image correlation connection and the position of image in this sequence be corresponding therewith.Timestamp can based on but be not limited to timestamp parameter, for example: timestamp accuracy (reach take second minute or hour be unit); The amplitude of timestamp; For surveying the minimum interval size of (or decoding latency); Error robustness; And carry out the encode size of required information of timestamp for each image.

In certain embodiments, the communicator of another network can be configured to a plurality of devices in described another network while having suspended the transfer of data in the 3rd frequency band in another silence period, sends and is used to indicate the occupied notification signal of the 3rd frequency band and is used to indicate the occupied notification signal of the second frequency band.

In one embodiment, described silence period and described another silence period occur simultaneously.In other words, described silence period and described another silence period occur at one time.For example, for continuous announcement period, if silence period starts from time A and the time B that arrives, wherein time A and time B are random time values, and another silence period also will start from time A and the time B that arrives.In another example, for discontinuous announcement period, if silence period starts from time A and the time B that arrives, and start from subsequently time C and the time D that arrives, wherein time C and time D are also random time values, and another silence period also will start from time A and the time B start from subsequently time C and the time D that arrives of arriving.In the time of this kind of described silence period and described another silence period, come across in discontinuous announcement period and continuous announcement period.

As an example, the dynamic bandwidth control technology of considering in CWPAN will be set forth in below.Suppose that to taking of channel be the basis based on First come first served.If there is network to operate in channel, the device from another type network can not start its running in this channel.For example, described network can be the network 302 of Fig. 3 (a) and Fig. 3 (b), and described channel can be the frequency band 304 of Fig. 3 (a), and from the device of another type network, can be the communicator 314 of Fig. 3 (a).

Suppose to have a kind of mechanism that can realize this function.Also suppose that described network equipment can survey himself beacon of existing network of type and the beacon of the existing network of another type.In addition, suppose that described network equipment not only can but also can operate at large frequency band in little frequency band, and the network equipment of another type can only operate in large frequency band.In addition, described network equipment can operate in the network in the network of himself type and in another type.

In particular instance, large frequency band can be but be not limited to the second frequency band; And little frequency band can be but is not limited to the first frequency band.

In some instances, use for little channel being become to large channel with unappropriated little combining channel or becoming the MAC algorithm of two or more little frequency bands can refer to the combination that comprises Fig. 2 large frequency band division or merge channel (or frequency band) 204 and comprise the division in Fig. 2 or divide the MAC agreement 200 of channel (or frequency band) 202.

" divide/division " 202 and " combination/merging " the 204th, the impermanency state of channel, that is to say, the channel of dividing can be finally and another channel combine, or the channel combining can finally be divided into independent channel.These states can be the state of circulation.

" division/division " channel or " combination/merging " channel refer to the channel after channel bandwidth change.Term " afterwards " refers to the succeeding state of channel.

When new network equipment wants existing network divide or be divided into little channel from large channel, first described new network equipment will add this existing network.This device then sends command frame to the individual Basic Service Set central point/access point (PCP/AP) of this existing network asks to carry out channel division.Request data frame is used to carry out channel division or channel distribution.If existing network determines its large channel distribution to become little channel, it informs that by its beacon time its whole devices in network (comprising that requesting party's device) are become little running channel to operate channel-changing.Can in beacon, use channel to switch notice information element (information element; IE) announce and switch to new little channel.Also responsive data frame can be sent to requesting party's device of wanting to start new network.Then, existing network suspends its running in large channel after a time period.This time period can be predetermined amount of time.Then, arrive as described above and in Fig. 2, the appointment of illustrated MAC agreement is during the stand-by period, existing network continues its running and carry out required program in new little channel as new network.For example, beam forming, associating, for seeervice cycle (service period; SP) cycle (the contention-based period and based on competition; CBAP) new arrangement etc. may be suitable for.

The requesting party who wants to start another new network is installed on and in its little frequency band, starts to wait the appointment stand-by period of MAC agreement as described above before its network running.Requesting party's device need to be listened to channel and switch bulletin IE in the beacon of existing network.As notified by the IE in its beacon in the existing network in existing large frequency band, requesting party's device will start its running as the new PCP/AP of new network in little frequency band.Want to add other devices of this new network to add by standard wave beam forming and joint program in another little channel.

When decommissioning, the network of the PCP/AP of the network operating in its adjacent little frequency band to carry high performance adjacent little channel cycle, carry out channel detection to being likely used to form large channel in little channel.If detect empty adjacent little channel, whether PCP/AP can determine to want its little channel expansion is become to large channel.If existing network determines its little channel expansion to become large channel, its all devices in network of beacon time announcement by it are become large running channel to operate channel-changing.Channel switching notice information element (IE) can be used in beacon and switches to new large channel with bulletin channel.Then, existing network suspends its running after a time period.Then, existing network continues its running and carry out required program in new large channel as new network.For example, beam forming, associating, for the new arrangement in seeervice cycle (SP) and the cycle (CBAP) based on competition etc., can be applicable.

For example, the coordinated notification signal for example, being sent in band sharing channel or shared spectra channels (frequency band 310 of Fig. 3 (a)) by the specified device of each network operating in channel band separately can by be used to form share access spectral band (or be referred to as share band or band sharing channel) a part or with the overlapping channel light bands of a spectrum of a part that shares access spectral band in the network of the device that operates take into account, described shared access spectral band is the legal band (legitimate spectrum band) in a plurality of homogeneities or heterogeneous wireless networks.Be used to form share access spectral band a part or with the overlapping frequency band of a part that shares access spectral band in the example of network of the device that operates can be the communication terminal of the running in network 302,312 of Fig. 3 (a).

Can be defined in that device in these networks of same type can intercom mutually and for the procotol of new netinit being met to following requirement:

I) specified device of little frequency band www.chinanews.com's network (for example network 302 of Fig. 3 (a)) or communication terminal (be generally control terminal, this can be the communication terminal 300 of Fig. 3 (a) for example or Fig. 3 (b)) are known the existence of all networks that are pre-existing in that operate in sharing a part for band.

Ii) specified device of new network can get down to by adding existing network or by listen to notification signal or by other means in the shared band of existing network, maintains with the coordination of the specified device of existing network and synchronizes.For example, this kind coordinate and synchronously can comprise Fig. 2 pass through share spectrum and bring the transmission 212 of notice coordinate signal and make silence period in network in each channel synchronous 216.

Iii) specified device of new network starts this new network after the control terminal that its intention is conveyed to existing network.

There is specified device and (be generally PCP/AP or piconet coordinator (piconet coordinator being used to form the network that shares a part for band or operate in overlapping channel light bands of a spectrum by a part for band together; PNC)), described specified device has following essential ability: the intermittent notification signal that sends out coordinated circulation in sharing band is being used to form and is sharing a part for band or with a part for band, in overlapping other channel bands, have network operating together with bulletin; And detect and in similar channel band, have other networks in running by the notification signal sending in large frequency band.These burst transfer of notification signal outside channel (burst transmission) have following characteristic:

I) it is discernible for the device that utilizes different wireless technologys to operate in sharing access band.Signal of communication is form or the form in using in many homogeneities or heterogeneous wireless technology of the beacon frame of different technologies conventionally, with indication network, take shared band or indicate two or more mixture of networks to take a part that is used to form shared band or other overlapping channel bands of a part of using together band, thereby be conducive to the network startup scanning imaging system generation minimum change of each type network.

Ii) duration between two continuous notification signals that transmitted by device should be shorter than and for judgement, for example share band the shortest whether occupied sweep time for what device was stipulated.

Term used herein " large frequency band/channel " and " little frequency band/channel " are relative.Large channel (or frequency band) has the wider bandwidth of bandwidth than little channel (frequency band) in essence.For example, the bandwidth of large channel can be but is not limited to the twice (or double) of the bandwidth of little channel or for three times of the bandwidth of little channel or for four times of the bandwidth of little channel or be five times of the bandwidth of little channel.

In addition, in the time durations distributing at the device at shared channel band transmission notice signal in specified device or each network, can set up the silence period in each network, in described silence period, all devices in its network suspend all transmission in the channel light bands of a spectrum of their networks separately.Therefore, during the silence period of each network in, only allow specified device transmission notice signal in shared band (being outside the channel band of each network) of each network.Thus, can realize the notification signal fidelity 214 in shared band that makes of Fig. 2.

The specified device of each network switches between following state: the one, while operating in the local network at them, the transmission of carrying out in their channel light bands of a spectrum, the 2nd, in the transmission of the notification signal carrying out in sharing band and the listening to of the notification signal sending during the specified device by other networks is being shared to band.The specified device of each network is used for to time period of transmission notice signal in band sharing and is denoted as announcement period (the notification period of each network; NP).With regard to single running network, silence period and announcement period can colocated and can be had the similar but discrepant duration, and to be the running that makes specified device switch or switch conversely the required time described difference between the channel band of their network is together with band.

Term used herein " colocated (co-located) " refers to be oriented to fully approach or located together.

If there is two or more networks operating simultaneously, the silence period of each network should be expanded to such an extent that comprise the announcement period of all existing networks.Can coordinate all different silence period of existing separate network and make their synchronizations, while making the specified device transmission notice signal in heterogeneous networks, every other device in these networks all suspends their transmission in their networks separately, this duration is denoted as to silence period here.

In addition, coordinate the notification signal of heterogeneous networks, make can not clash.The notification signal transmission that it should be noted that heterogeneous networks needs not to be continuous and silence period and also needs not to be continuous.Yet this kind of distribution is good, hereinafter in connection with further setting forth these benefits for the MAC agreement of accurate omnidirectional range frame transmission.

Notification signal the frequency in each network and relative position can be (i) fixing and for different homogeneities or heterogeneous wireless technology through standardized; Or be (ii) fixing and by one of specified device of network, determined; Or for (iii) is dynamic and set up by one of specified device of network.

For maintain the coordination of silence period and the coordination of notification signal synchronous and that send in sharing band, running simultaneously but independently the specified device of each network in network should be able to keep synchronized with each other.

Synchronization need to be appointed as one of specified device of network Synchronization Control terminal and need to utilize one of following methods:

I) by time of reception in the broadcast in described Synchronization Control terminal stab to make other specified devices and described Synchronization Control terminal during its NP in synchronization in sharing band.

The broadcast of periodically listening to described Synchronization Control terminal in the local channel frequency band of other specified devices of other networks that ii) operate in described Synchronization Control terminal in their little frequency bands separately.

Term used herein " local (native) " can refer to " original " or " initially " conventionally.

In each embodiment, notification signal can comprise beacon interval.Notification signal can be used to indicate the occupied notification signal of the 3rd frequency band, maybe can be to be used to indicate the occupied notification signal of the second frequency band, can be to be maybe used to indicate the occupied notification signal of the first frequency band.For example, beacon interval can be but is not limited to the beacon interval shown in Fig. 1.

In one embodiment, beacon interval can comprise accurate omnidirectional range frame.Accurate omnidirectional range frame can be circulation.

Term used herein " circulation " refers to repetition.

The communication terminal of network and the communication terminal of another network all can be configured to utilize timer to maintain the beacon interval duration in the first frequency band and the 3rd frequency band respectively.

The first frequency band and the 3rd frequency band beacon interval duration in each can comprise idling cycle (idle period), and network and/or another network are all restarting timer to keep another beacon interval to wait for until the beacon interval duration finishes in described idling cycle before the duration.

In the context of each embodiment, term " idling cycle " refers to the following time period: wherein, network has completed its running in frequency band and do not carried out any action but wait, until the beacon interval duration finishes.

Term " wait " or " waiting marquis " can refer to allow time lapse.Term " restarts " and refers to reset, for example, timer is reset to zero, or by timer, in a time range, is restarted regularly, and time range described here can be known or predetermined.

In this context, term " another beacon interval duration " means with respect to beacon interval the new and/or different beacon interval duration for the duration.

In one embodiment, the first frequency band and the 3rd frequency band can obtain by dividing the second frequency band.

For announcement period and another announcement period, they each duration all can derive by the sector number (sector number) from the communicator of network or the communicator of another network after the second frequency band can be divided into the first frequency band and the 3rd frequency band.

In each embodiment, communication system also can comprise: a plurality of networks, in order to operate in a plurality of frequency bands; And a plurality of communicators of described a plurality of networks, each in described a plurality of communicator in order to send and be used to indicate each the occupied notification signal in described a plurality of frequency band and be used to indicate the occupied notification signal of the second frequency band in announcement period separately, and the second frequency band comprises a part for described a plurality of frequency band or described a plurality of frequency bands here.

For example, described a plurality of frequency band can refer to the 4th frequency band or multiband more.

In second aspect, as shown in Figure 4, provide a kind of communicator of network.In Fig. 4, communicator 400 comprises: reflector 402, in order to utilize the second frequency band or the first frequency band to transmit data in data transfer cycle; Transceiver 404, in order to send and to be used to indicate the occupied notification signal of the first frequency band and to be used to indicate the occupied notification signal of the second frequency band in announcement period; And controller 406, in order to running is switched to the second frequency band or switches to the first frequency band from the second frequency band from the first frequency band, to send, be used to indicate the occupied notification signal of the first frequency band and be used to indicate the occupied notification signal of the second frequency band.

For example, communicator can be the communicator 306 of Fig. 3 (a).Term " frequency band ", " data transfer cycle ", " transceiver ", " transmission ", " notification signal ", " indication ", " announcement period ", " taking ", " switching ", " running " can be as hereinbefore defined.

Example for illustration object provides the MAC agreement for accurate omnidirectional range frame, this accurate omnidirectional range frame is sent out in large frequency band by each the CWPAN specified device operating in little frequency band, with having notice to potential new IEEE802.11ad network or wanting to start the potential new CWPAN device of new network or new CPWAN device in large frequency band CWPAN network.

Use the example of the CWPAN network described in Fig. 5, CWPAN device can operate in large frequency band L1 or L2, and when the large channel of the network in running is divided in other new equipment requests, CWPAN device can operate in little frequency band S3, S4, S5 or S6.IEEE802.11ad device can only operate in large frequency band L1 or L2.In this kind of situation, large frequency band L1 or L2 will be that the large CWPAN specified device that is used to sends the shared band (being band sharing channel) of accurate omnidirectional range frame.

Below sight scheme will be described below: the CWPAN network having operated can continue to realize and the coexisting of IEEE802.11ad network (one or more network) by send accurate omnidirectional range frame in large shared band in having covered the little frequency band of large frequency band.Although it should be noted that the details of utilizing CWPAN situation is provided, according to the MAC agreement of each embodiment, be illustrative, and IEEE802.11ad network can easily be expanded for other similar wireless networks.

In the first sight scheme, suppose that CWPAN network operates in L1, wherein specified device or network controller are denoted as PCP/AP1.In this stage, if two kinds of utilizations is similar wireless air interface, IEEE802.11ad device can easily be surveyed the existence of CWPAN network.

In the second sight scheme, should note, the new equipment that is denoted as PCP/AP2 wish by division bandwidth with form as shown in Figure 5 in little frequency band S5 and S6 two independently network share L1, when in the request of described new equipment, licensed and described new equipment successfully starts its new network, described new equipment will become the new specified device of the new network operating in little frequency band.According to above described dynamic bandwidth, control MAC technology, when PCP/AP2 intention operates in little frequency band, its will be first by the boot in the accurate BTI of omnidirectional (bootstrapping procedure) thus as device (or being called STA), add the network of the existing PCP/AP1 in large frequency band.After this, as illustrated in Fig. 7 (a), device can be divided into S5 channel and S6 channel by L1 channel when PCP/AP1 determines large frequency band to be divided into little frequency band.PCP/AP1 should license frame (Grant frame), beacon frame or bulletin frame by inclusion information element (IE) notifies whole STA (comprising that intention is becoming requesting party's device or station (STA) of candidate PCP/AP or PCP/AP2 a little later) in its network, and when it starts new network in little frequency band.Described information comprises the channel number relevant to little frequency band and for the shared band large, by PCP/AP1 and PCP/AP2, sends the duration of the announcement period (NP) of accurate omnidirectional range frame.

In a more general case, these information in the accurate omnidirectional frame that the specified device of taking on AP or PCP effect in the little frequency band of a part that takies large shared band is broadcasted in also can being embedded in large shared band, with the device of helping in the following manner to want/determine operate in this frequency band: be added in the network operating in little frequency band that operate in large frequency band or in large frequency band, or survey the existence of described network, or in basic network (one or more network) scanning imaging system, using minimum variation by coordinating and synchronized announcement period finds another channel for new network startup as discovery procedure.

For the interference between the CWPAN network avoiding operating in little frequency band and the IEEE802.11ad network that operates in large frequency band, PCP/AP1 and PCP/AP2 are periodically sending accurate omnidirectional range frame in will be during NP in large frequency band, other device, for example new IEEE802.11ad device or other new CWPAN devices with notice scanning channel (PCP/AP1 and PCP/AP2 operate in little frequency band) in medium time subsequently).The accurate omnidirectional range frame sending in during NP should be described in IEEE802.11ad without the form of revising or have the accurate omnidirectional range frame of minor modifications.If need to revise, will set forth the details of this modification in the part below.

For the problem of the hiding PCP/AP shown in reply Fig. 6, each PCP/AP should Nei Yizhun omnidirectional mode transmit beacon frame during NP.For example, PCP/AP1 and PCP/AP2 can be at corresponding transmission range (transmission range; TR) in, mutually hear, and be positioned at the TR of PCP/AP1 but be positioned at that device that is denoted as device A outside the TR of PCP/AP2 can not uppick from any beacon frame of PCP/AP2.Similarly, be positioned at the TR of PCP/AP2 but be positioned at another device that is denoted as device B outside the TR of PCP/AP1 can not uppick from any beacon frame of PCP/AP1.So, because PCP/AP2 to device A be hide and PCP/AP1 device B is hidden, so PCP/AP1 and PCP/AP2 periodically transmit each frame to guarantee maximum space covering in should be during NP.

NP in the circulation distributing for different PCP/AP should arrange continuously without compartment of terrain; Therefore they will have identical circulation timei.This kind is arranged so that PCP/AP1 and PCP/AP2 can minimize the bandwidth switching cost between little frequency band and large frequency band.Each PCP/AP only need switch to from the little frequency band of himself large frequency band (sharing band) once, in during NP, transmit its accurate omnidirectional range frame and from another PCP/AP, receive accurate omnidirectional range frame subsequently, and then in each circulation, switching the little frequency band of getting back to it.It should be noted that between large frequency band and little frequency band and little frequency band and large frequency band between the execution mode that depends on radio frequency (RF) circuit switching time.Its typical duration is about hundreds of microseconds.

The length of NP depends on frame length and section sum arbitrarily, the described section sum of relevant PCP/AP use in the transmission zone being combined by whole DBand antennas is scanned, that is,

The length of section sum * frame of length=PCP/AP of NP

Here, section sum obtains by the ability information exchange between PCP/AP device and its device or station (STA) in can be during adding the stage, and frame length can be by calculating and obtain the essential information of transmission in need to be during NP.Therefore, PCP/AP1 and candidate PCP/AP (or being hereinafter referred to as PCP/AP2) can be easily for example, by learning that the sector number of PCP/AP or candidate PCP/AP calculates each NP duration (NP1 and the NP2 as shown in Fig. 7 (b)), and after large band splitting is become to less frequency band, before they start to transmit, derive subsequently the total duration of NP.Fig. 7 (b) has shown the frame structure according to each embodiment.

In addition, for eliminating the interference between frequency band, the synchronization that need to keep NP.For the time drift (time drift) that reply causes because of the clock between two PCP/AP inclined to one side (clock offset), PCP/AP must be during each NP in periodically synchronization.This can be by time synchronization function (the time synchronization function defining in IEEE802.11; TSF) realize, wherein PCP/AP2 during the NP of PCP/AP (being NP1) in from PCP/AP1 received frame.NP1 can be transmitted before at the NP of PCP/AP2 (being NP2), and each frame being sent by PCP/AP1 in during this NP2 must comprise for making the synchronized timestamp information of PCP/AP2.Seen at Fig. 7 (b), square frame 700 represents that NP1 and ensuing square frame 702 represent NP2.Total NP duration is the summation of NP1 and NP2.

The periodicity of NP is by the PCP/AP operating in the little frequency band maximum channel sweep time decision required with the PCP/AP operating in large frequency band of required smallest synchronization cycle.For example, in IEEE802.11ad, minimum channel is set equal to maximum BI duration ，Ji MinChannelScan=MaxBIDuration=1000 (the time unit of chronomere sweep time; TU).Therefore, can not be set to the circulation timei of NP and be greater than 1000TU.Under above-mentioned restriction, the actual cycle time of NP should be determined by PCP/AP1 before a NP.

When starting to divide large bandwidth while finishing (or the last BI that is equivalent to operate in large frequency band), each PCP/AP should start new Timing Synchronization function (Timing Synchronization Function; TSF) circulation timei to follow the trail of NP in large frequency band.Obviously, periodically NP is that in large frequency band, periodically sending out accurate omnidirectional range frame aspect has similar time structure to BI.Yet periodically NP is different from real BI object.Therefore, be defined as virtual beacon interval (the virtual beacon interval as shown in Fig. 7 (b) circulation timei of NP; VBI) 704.The value of VBI704 duration is regarded as the value of BI, to upgrade BI duration field in the beacon frame being sent out in being during NP.

On the other hand, each PCP/AP should start new TSF timer to keep the BI duration 706 (being called SBBI) in little frequency band.All the other programs that are used for the running of little frequency band should be identical with all the other programs in large frequency band.

In each NP, by corresponding PCP/AP, in large frequency band Zhong Yizhun omnidirectional mode, transmit each frame.Seen at Fig. 8 (a), the field comprising of beacon frame is listed as follows:

-frame control field 800, comprises protocol version, type, subtype, control frame expansion etc.

-duration field 802, is set to and retains until the time of the end of last NP always.

-BSSID field 804, the BSSID that comprises BSS.The main body of the DBand beacon frame sending in during NP comprises listed element in Fig. 8 (b), and described element comprises that timestamp, section scan, beacon interval, beacon interval are controlled and DBand parameter.

-VBI the duration, the circulation timei that comprises NP.Should in beacon interval field, upgrade this BI duration.

-in beacon interval control field, by utilizing the bit retaining to create newer field-CWPAN channel width with 2 bits, to meet the channel width information for CWPAN device (Fig. 8 (C)).The example features of CWPAN channel width is shown in Fig. 8 (d).

After NP, PCP/AP1 and PCP/AP2 are operated from large frequency band switches to they self little frequency band.For guaranteeing that PCP/AP1 and PCP/AP2 have time enough successfully to process this frequency band and switch, will be denoted as to protect the time period at interval (GI) to be inserted between the starting point of BI of NP and little frequency band.The information of GI can obtain from the parameter information of device.It should be noted that the diversity because of hardware, PCP/AP1 may have different GI from PCP/AP2.In Fig. 7 (b), suppose that PCP/AP1 operates and PCP/AP2 operates in S6 after large band splitting is become to two little frequency bands in S5.Also hypothesis is different from the GI for PCP/AP2 for the GI of PCP/AP1.Therefore it is independent that, PCP/AP1 and PCP/AP2 keep their network in their ensuing medium time.PCP/AP1 or PCP/AP2 should be according to accessible message transmission rate and needed service quality (Quality ofService; QoS) etc. independently determine the length that comprises the SBBI of BTI, A-BFT, AT and DTT length at himself channel.Yet, for making the starting point of SBBI remain same position, each SBBI of PCP/AP can be set as to following length: described length is according to the integer factor of the VBI duration of chronomere (TU).The TU of the device operating in little frequency band can with or can be not identical with the specified TU of device for operating in large frequency band.Thus, the duration of VBI can be set to the non-prime number (non-prime number) of TU.

Another example is the variation that the hardware implementation mode that the frequency band in RF circuit switches is not depended in the selection of GI duration.Select to meet the value of poor situation.Therefore, PCP/AP1 and PCP/AP2 can start their SBBI the same time after NP and then.

For periodically carrying out NP, each PCP/AP should distribute SP in the transmission of the next NP as silence period (QP) as Fig. 7 (b) as shown in when in the end the DTT of SBBI finishes before.The duration of the SP distributing is contained described two NP and as described in as shown in Fig. 7 (b) before the NP of two PCP/AP and GI afterwards.

In the 3rd sight scheme, considered following situation: the one in the network in built vertical S5 and S6 then these networks finally stops the situation of its network running.When not when stopping any accurate omnidirectional range frame that the PCP/AP of network running sends in detecting during NP adjacent little frequency band, by another PCP/AP operating, learn that one of PCP/AP of operating has lacked in adjacent little frequency band in little frequency band.For preventing the possibility of losing frame, before the network that determines another adjacent PCP/AP has stopped network running, PCP/AP waits for the MaxExpireDuration duration, the integral multiple that this duration is VBI, and start from the moment that the last frame from another PCP/AP is received.

After this, PCP/AP continue with by its bandwidth from little band spreading to large frequency band.Fig. 7 (c) is exemplified with following situation: wherein PCP/AP2 lacks in little frequency band S6, and PCP/AP1 prepares to be operated bandwidth and expands to large frequency band L1 to improve network performance from current little frequency band S5 in MaxMergeInterval.

Similarly, if PCP/AP1 lacks in little frequency band S5, PCP/AP2 preparation is large frequency band L1 by its bandwidth expansion in MaxMergeInterval.

In the third aspect, as shown in Figure 9, provide a kind of method of coordination network running.In Fig. 9, method 900 comprises: in the first frequency band, operate 902; And in announcement period, send the indication occupied notification signal of the first frequency band and indicate the occupied notification signal 904 of the second frequency band, wherein the second frequency band comprises a part for the first frequency band or the first frequency band.

Term " network ", " frequency band ", " running ", " transmission ", " announcement period ", " notification signal ", " indication ", " occupied " are as hereinbefore defined.

For example, network can be the network 302 of Fig. 3 (a).

Method 900 can comprise media access control (MAC) method.

In each embodiment, described method also can comprise: in the 3rd frequency band, operate another network; In another announcement period, will indicate occupied another notification signal of the first frequency band and indicate the occupied notification signal of the second frequency band to be sent to the communicator of another network, wherein the second frequency band comprises a part for the 3rd frequency band or the 3rd frequency band.

In one embodiment, sending notification signal and another notification signal 904 can comprise: in different time sections, in the second frequency band or the first frequency band, broadcast described notification signal and described another notification signal, to coordinate the broadcast of described notification signal and described another notification signal.

Term " broadcast " as hereinbefore defined.Term " coordination " refers to be arranged or arranges.In this context, coordinated to provide the order of broadcast, so that each notification signal can mutually not conflict in their transmission separately.

In another embodiment, method 900 also can comprise the availability of determining the second frequency band or the first frequency band.

Term " availability " refers to unoccupied.

In each embodiment, determine that the availability of the second frequency band can comprise: scan the second frequency band and reach predetermined amount of time, wherein said predetermined amount of time is at least the duration of announcement period and another announcement period.

For example, scanning can be carried out by linear scan or fractional scanning (segment scanning).

As illustrative example, relevant bandwidth merges processing and is described below:

If its channel width of PCP/AP1 (or PCP/AP2) intention expansion, its in BTI, transmit beacon frame or in AT transmission bulletin frame, and notify whole non-PCP/AP STA for extend the SBBI of the term of validity of MaxMergeInterval finish or stop before switch to large frequency band L1.It should be noted that within merging time durations, in the NP that PCP/AP1 (or PCP/AP2) continues to have arranged at it, transmit frame.Yet, its in the end the NP in SBBI after finishing, do not switch back little frequency band S5 (or S6), as shown in Fig. 7 (c).

PCP/AP can be retained in large frequency band L1, wait for through idling cycle (IP) until current SBBI finishes, and then by set new TSF timer in medium time subsequently, restart timer to start new BI, as shown in Fig. 7 (c).Alternatively, PCP/AP can stop current SBBI and in large frequency band neutrality, be new BI in ensuing medium time restarting new TSF timer when NP finishes, or PSP/AP can stop current SBBI and start new TSF timer for new BI in ensuing medium time in GI after switching to large frequency band, and do not transmit last NP.In all scenario, PCP/AP notifying device or station (STA) be selected extender before channel is from little band spreading to large frequency band.Therefore, PCP/AP1 is because from little frequency band, smooth switching and the continuity of frequency band maintain the network running that interruption does not occur extremely greatly.

If any other PCP/AP intention added PCP/AP1 (or PCP/AP2) before bandwidth expansion, it obtains information needed from the received accurate omnidirectional range frame being sent by PCP/AP1 (or PCP/AP2), and learns that large frequency band is unavailable under current state.Therefore, its etc. its claim frame to be sent, until PCP/AP1 (or PCP/AP2) successfully finishes (completing) bandwidth expansion and during the BTI of ensuing BI in large frequency band, sending beacon frame.Yet, want to add the non-AP device of non-PCP/ of little frequency band network or station (STA) still must be adjusted to the little frequency band of drafting and receive the accurate omnidirectional range frame being sent by existing PCP/AP.

If only PCP/AP is operating in large frequency band, and become new PCP/AP request by the frequency band of large band splitting Cheng Geng little without device or station (STA) intention, existing PCP/AP can be not during the DTT of the BI distributing for NP in any SP of distribution.

According to the method for each embodiment, advantageously:

-accurate omnidirectional range the frame of intermittence by circulation transmits to announce in large shared band, to exist in network or the less frequency band in large frequency band and has network, and the network operating in overlapping spectral band can be coexisted.

-making to wish can be by only listening to the seizure condition that accurate omnidirectional range frame is surveyed interested frequency band in large shared access frequency band in a shared part for band or the device of the new network of whole middle running, and this is greatly conducive to the minimum change of network startup scanning imaging system of the new equipment of comparativity (backwards comparability) backward and another network type.

-by set up, coordinate and the little frequency band of synchronization in all operational networks in announcement period, by the PCP/AP of specified device or each network of moving, guarantee the fidelity of the accurate omnidirectional range frame that uses in large frequency band bulletin in little frequency band.

-the omnidirectional range that is as the criterion frame and bulletin frequency provide very big flexibility, to meet identical or different existing wireless technology.Therefore, described method can easily adjust to be applicable to different running imaginations and running object.

-can be applicable to well the form of implementation of one group of MAC agreement, this can effective coordination and the network that independently operates of synchronization, to utilize spending seldom and bandwidth lose and as described herein in minimum channel notice coordinate switching time cycle between frequency band and little frequency band greatly.

-can effectively be embodied as one group of MAC agreement, this makes whenever maintaining when bandwidth being divided in MAC framework or expanding, network all can successfully switch between shared band (being large frequency band) and network channel frequency band (being little frequency band), in described MAC framework, all the time the bulletin that takies that shares band is extremely scanned to the interested parties (interested party) that shares spectrum with the basic scanning imaging system of minimum change utilization.

Each embodiment provides the method to operate at shared band for notifying device plan, described common spectrum band and a plurality of other channel light bands of a spectrum are overlapping or consist of described a plurality of other channel light bands of a spectrum, described a plurality of other channel light bands of a spectrum may not have same band with this shared band, and taken by a plurality of independently transceiver networks, described network all operates in the different described channel light bands of a spectrum of its network, to prevent from being taken by plan the caused data packet collisions of other transceiver wireless networks (packet collision) of described shared band.

This method comprises following content.

The cyclic burst of being carried out notification signal in other channel bands by the appointment member of the described a plurality of transceiver wireless networks that operate in sharing band is transmitted, described other channel bands are in sharing band or use together band overlapping, wherein in channel band, between the transmission of the specified device of each network in its local channel band and the transmission in sharing band, switch, thereby correspondingly change channel width and/or carrier frequency.This is unique MAC running.

When specified device transmits accurate omnidirectional range frame, in other channel light bands of a spectrum, by setting up silence period, in sharing band, measure to guarantee the fidelity of notification signal, described other channel light bands of a spectrum are in shared channel band or overlapping with shared channel light bands of a spectrum, wherein the silence period of transceiver wireless network is defined as the time period in network, within this time period, all members of described network suspend all transmission in the appointment band of network.

The transmission of the different specified devices notice coordinate signal in frequency band in the different separate network operating in frequency band is to avoid the conflict between accurate omnidirectional range frame, and coordinate, synchronization, and extend in the different silence period of the separate network operating in frequency band, with along with by (i) in sharing band or (ii) therein device can operate other specify communication between the specified device in the heterogeneous networks in bands to realize to coordinate and synchronization, for all devices in all frequency band networks each the final controlling element in this frequency band network form the real radio silence cycle in sharing band.

Comprise one group of MAC agreement, with whenever large band channel being divided into less frequency band or detecting adjacent networks in little frequency band while no longer operating while will less band spreading becoming large frequency band, guarantee between large frequency band and little frequency band, to switch smoothly to realize the continuous of new network running or network running, transmission with the accurate omnidirectional range frame of guaranteeing to come the specified device in frequency band from childhood in large frequency band keeps coordinating and continuously within the following time: during the network in frequency band operates greatly, during network running in little frequency band, and from during large frequency band being divided into the handover network running of little frequency band or becoming transient period (transient period) of switching running of large frequency band from little band spreading.

Define a set of about MAC beacon interval (BI) or superframe (superframe; SF) the periodic guide rule of the content of structure, beacon frame and the accurate omnidirectional range frame that sends in large frequency band.

Described method is embodied as to the form of implementation of one group of MAX agreement, described MAC agreement is before any network comes into operation in channel light bands of a spectrum, and the exchange by important information realizes the efficient coordination of accurate omnidirectional range frame transmission and the synchronization of silence period; And between the specified device in the little frequency band network of the difference in large shared band, property performance period is coordinated and synchronization.

From the continuous transmission of the accurate omnidirectional range frame transmission of the specified device of the little frequency band network of difference, can reduce between the little channel light bands of a spectrum in this locality and large shared band and switch required channel number.

Phrase " at least in fact " can comprise the change of " just " and +/-5% thereof.As limiting examples, phrase " A is identical at least in fact with B " can comprise wherein the A embodiment identical with B just, or in the change of for example +/-5% of the value that wherein A can be in B, or good on the contrary.

Although the present invention has been carried out to concrete demonstration and elaboration with reference to specific embodiment, yet those skilled in the art will appreciate that, can to the present invention, make the various changes in form and in details in the situation that do not deviate from the spirit of the present invention and the scope that are defined by the claims of enclosing.Therefore scope of the present invention is indicated by the claims of enclosing, and therefore the present invention is intended to contain fall within the implication of claims equivalence and the institute in scope and changes.

Claims (34)

1. a communication system, it comprises:

Network, it is formed in the first frequency band and operates; And

The communicator of described network, it is formed in announcement period and sends and be used to indicate the occupied notification signal of described the first frequency band and be used to indicate the occupied notification signal of the second frequency band,

Wherein said the second frequency band comprises a part for described the first frequency band or described the first frequency band.

2. communication system as claimed in claim 1, wherein, the described communicator of described network is configured to described running to switch to described the second frequency band from described the first frequency band, or switch to described the first frequency band from described the second frequency band, to send, be used to indicate the occupied described notification signal of described the first frequency band and be used to indicate the occupied described notification signal of described the second frequency band.

3. communication system as claimed in claim 2, wherein, the described running from described the first frequency band to described the second frequency band or the described running from described the second frequency band to described the first frequency band are that circulation is carried out.

4. communication system as claimed in claim 2, wherein, described the second frequency band is shared band channel.

5. communication system as claimed in claim 4, wherein, described announcement period comprises the circulation timei of being followed the trail of in described the second frequency band by timer.

6. communication system as claimed in claim 2, wherein, described the first frequency band is shared band channel.

7. communication system as claimed in claim 4, wherein, described announcement period comprises the circulation timei of being followed the trail of in described the first frequency band by timer.

8. communication system as claimed in claim 2, wherein, the described communicator of described network is formed in protection interval described running is switched to described the second frequency band or switches to described the first frequency band from described the second frequency band from described the first frequency band.

9. communication system as claimed in claim 1, wherein, a plurality of devices of described network are formed in data transfer cycle and utilize running to have described first frequency band of described network or described the second frequency band to transmit data.

10. communication system as claimed in claim 9, wherein, the described communicator of described network is configured to described a plurality of devices in described network and in silence period, has suspended when described the first frequency band separately or the transfer of data in described the second frequency band, sends and is used to indicate the occupied described notification signal of described the first frequency band and is used to indicate the occupied described notification signal of described the second frequency band.

11. communication systems as claimed in claim 10, wherein, described silence period comprises described announcement period.

12. communication systems as claimed in claim 1, wherein, the described communicator of described network comprises access point or individual Basic Service Set central point or piconet coordinator.

13. communication systems as claimed in claim 1, it also comprises:

Another network, it is formed in the 3rd frequency band and operates; And

The communicator of described another network, it is formed in another announcement period and sends and be used to indicate the occupied notification signal of described the 3rd frequency band and be used to indicate the occupied described notification signal of described the second frequency band,

Wherein said the second frequency band comprises a part for described the 3rd frequency band or described the 3rd frequency band.

14. communication systems as claimed in claim 13, wherein, described network and described another network are same type.

15. communication systems as claimed in claim 13, wherein, described network and described another network are dissimilar.

16. communication systems as claimed in claim 13, wherein, described network and/or described another network comprise that respectively Chinese wireless personal domain network is CWPAN network.

17. communication systems as claimed in claim 13, wherein, described announcement period and described another announcement period are the continuous cycles.

18. communication systems as claimed in claim 13, wherein, the described notification signal of described another network comprises for by the timestamp of described another network and described Network Synchronization.

19. communication systems as claimed in claim 13, wherein, the described communicator of described another network is configured to a plurality of devices in described another network while suspending the transfer of data in described the 3rd frequency band in another silence period, sends and is used to indicate the occupied described notification signal of described the 3rd frequency band and is used to indicate the occupied described notification signal of described the second frequency band.

20. communication systems as claimed in claim 19, wherein, described silence period and described another silence period occur simultaneously.

21. communication systems as claimed in claim 13, wherein, described notification signal comprises beacon interval.

22. communication systems as claimed in claim 21, wherein, described beacon interval comprises accurate omnidirectional range frame.

23. communication systems as claimed in claim 22, wherein, described accurate omnidirectional range frame circulates.

24. communication systems as claimed in claim 21, wherein, the communication terminal of described network and the communication terminal of described another network are configured to respectively to utilize timer to maintain beacon interval duration in described the first frequency band and the beacon interval duration in described the 3rd frequency band.

25. communication systems as claimed in claim 24, wherein, described the first frequency band and described the 3rd frequency band described beacon interval duration in each comprises idling cycle, and each is restarting described timer to keep another beacon interval to wait for until the described beacon interval duration finishes in described idling cycle before the duration described network and/or described another network.

26. communication systems as claimed in claim 13, wherein, described the first frequency band and described the 3rd frequency band obtain by dividing described the second frequency band.

27. communication systems as claimed in claim 26, wherein, described announcement period and described another announcement period each there is the following duration: this duration is from the sector number of the described communicator of described network or the described communicator of described another network, to derive after described the second frequency band is divided into described the first frequency band and described the 3rd frequency band.

The communicator of 28. 1 kinds of networks, described communicator comprises:

Reflector, it is formed in data transfer cycle and utilizes the second frequency band or the first frequency band to transmit data;

Transceiver, it is formed in announcement period and sends and be used to indicate the occupied notification signal of described the first frequency band and be used to indicate the occupied notification signal of described the second frequency band; And

Controller, it is configured to running to switch to described the second frequency band or switch to described the first frequency band from described the second frequency band from described the first frequency band, to send, is used to indicate the occupied described notification signal of described the first frequency band and is used to indicate the occupied described notification signal of described the second frequency band.

The method of 29. 1 kinds of coordination network runnings, described method comprises:

In the first frequency band, operate; And

In announcement period, send and be used to indicate the occupied notification signal of described the first frequency band and be used to indicate the occupied notification signal of the second frequency band,

Wherein said the second frequency band comprises a part for described the first frequency band or described the first frequency band.

30. methods as claimed in claim 29, it also comprises:

In the 3rd frequency band, operate another network;

In another announcement period, will be used to indicate occupied another notification signal of described the 3rd frequency band and be used to indicate the communicator that the occupied described notification signal of described the second frequency band is sent to described another network,

Wherein said the second frequency band comprises a part for described the 3rd frequency band or described the 3rd frequency band.

31. methods as claimed in claim 30, wherein, send described notification signal and described another notification signal comprises: in different time sections, be in described the second frequency band or described the first frequency band and broadcast described notification signal and described another notification signal, to coordinate the described broadcast of described notification signal and described another notification signal.

32. methods as claimed in claim 30, it also comprises: the availability of determining described the second frequency band or described the first frequency band.

33. methods as claimed in claim 32, wherein, the described availability of determining described the second frequency band comprises: scan described the second frequency band and reach predetermined amount of time, predetermined amount of time described here is at least the duration of described announcement period and described another announcement period.

34. communication systems as claimed in claim 1, it also comprises:

A plurality of networks, they are formed in a plurality of frequency bands and operate; And

A plurality of communicators of described a plurality of networks, each is formed at described a plurality of communicator respectively in announcement period separately to send and is used to indicate each the occupied notification signal in described a plurality of frequency band and is used to indicate the occupied described notification signal of described the second frequency band

Wherein said the second frequency band comprises a part for described a plurality of frequency band or described a plurality of frequency bands.

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