CN103548371B - To the dynamic bandwidth control for network coexisted channel - Google Patents

Abstract

The present invention relates to a kind of communication system, the communication system includes：Network, it is configured to operate in the first frequency band；And the communicator of the network, it is configured to be sent in announcement period for indicating the occupied notification signal of the first band and for indicating the occupied notification signal of second band.In the communication system, the second band includes a part for the first band or the first band.Invention also discloses a kind of method of coordination network running.

Description

To the dynamic bandwidth control for network coexisted channel

Cross-Reference to Related Applications

The application with reference to the application case of the submission of on March 8th, 2011 " for MAC protocol (the A MAC of dynamic bandwidth control Protocol for Dynamic Bandwidth Control) " and on June 15th, 2011 submit to application case " be used for net Dynamic bandwidth control MAC protocol (the Dynamic Bandwidth Control MAC Protocols for Co- that network coexists Existence of Networks) " and advocate the benefit of priority of the two application cases, the two application cases be to new plus It is that slope Department of Intellectual Property submits to and formally authorized application number 201101650-8 and 201104372-6.

Technical field

Each embodiment relates generally to the field of the dynamic bandwidth control of the channel of network running, specifically, It is related to media access control agreement (the Medium Access to carrying out dynamic bandwidth control for network coexisted channel Control protocol)。

Background technology

Different wireless technologys are occurred in that at present, and all of which is exempted to authorize band (unlicensed in identical Spectrum band) interior (such as in 60GHz frequency bands (i.e. DBand)) running.Designed many in DBand The standardized technique of work or the technology being standardized, including IEEE802.11ad, standardization IEEE802.15.3c and mark Standardization ECMA-387.

Additionally, Chinese wireless personal domain network (China Wireless Personal Area Network；CWPAN) It is according to China national information technology standard (China National Information Technology Standardization；NITS Chinese Industrial Standards (CIS) working group), it is used as Chinese wireless personal domain network (wireless personal area network；WPAN the specification operated in the range of 60GHz) is defined.However, in China and the big profit of Australia The 60GHz spectrum that Asia is issued are much smaller than the spectrum in other countries.For example, China issue 60GHz spectrum cover with 3 corresponding 2 channels of channel 2 and channel used in IEEE802.11ad, and in the Australian 60GHz spectrum issued only It is corresponding with the channel 2 used in IEEE802.11ad.

For the number for making logic channel increases, it is necessary in media access control (Medium Access Control；MAC) Channel is split into smaller strip channel wide at layer.In the case where smaller channel is broken a channel into, need badly share Coordinate the running of heterogeneous networks in band to realize coexisting.

MAC protocol generally includes the use of IEEE802.11MAC beacon intervals.

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

Beacon interval 100 in IEEE802.11ad MAC is generally classified into 4 parts：

Beacon transmission interval (Beacon transmission interval；BTI)104

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

Bulletin time (Announcement time；AT)108

Data transmission period (data transfer time；DTT)102

In a period of beacon transmission interval (BTI) 104, personal Basic Service Set central point (personal basic service set sentral point；PCP)/access point (access point；AP it is) accurate omni-directionally via different sections Transmit one or more DBand beacon frames (beacon frame).Beacon frame carries network management information.Beacon frame is also supported Network synchronization function.

Beacon frame is used as in PCP/AP and non-PCP/ non-ap stations (station；STA carried out between) wave beam into The training frames of type.Be to add network, STA beacon is scanned and proceed together with PCP/AP in A-BFT wave beam into Type treatment, and then AT108 or based on competition access period CBAP110,116 in a period of combine with PCP/AP.

United beam shaping training (A-BFT) 106 is to perform primary wave between the non-AP STA of PCP/AP and non-PCP/ Beam forming is trained.A-BFT106 is divided into time slot to allow to make the non-AP STA of multiple non-PCP/ in same A-BFT106 simultaneously Beam forming is performed together with PCP/AP.

In a period of bulletin time (AT) 108, can perform between the non-AP STA of PCP/AP and non-PCP/ based on please The management asked-respond is accessed.PCP/AP is in data transmission period (DTT) 102 to CBAP110, CBAP116 and seeervice cycle (SP) 112 distribution and the distribution of seeervice cycle (SP) 114 is arranged.

In a period of data transmission period (DTT) 102, during CBAP110, CBAP116 and SP112, SP114 Interior any frame may all occur, including application data frame transmission.Interior access is with modified during CBAP110, CBAP116 Based on IEEE802.11EDCA runnings (it has carried out fine setting for beam communication).It is interior during SP112, SP114 Access is arranged and is allocated to specific station.

When expecting CWPAN networks with others DBand networks (DBand network) using identical frequency band, can go out Existing coexistence problems.According to the dynamic bandwidth control technology considered in CWPAN, big frequency band can split into two small frequency bands with Two different CWPAN networks are accommodated simultaneously.In this kind of situation, it is desirable to which the other kinds of network for taking current big frequency band will Any quasi- nodirectional beacon frame (quasi-omni of CWPAN network uppicks that can not be operated from small frequency band in the big frequency band Beacon frame), if the problem cannot mitigate, can interfere.Equally, with existing DBand technologies not With band channel some technologies in, what channel occupancy was designated as the channel of existing DBand networks defines frequency band Some parts, therefore these technologies will face similar problem.

Accordingly, it is desirable to provide a kind of high data rate service and can be most of being realized in for network coexisted channel The MAC protocol of smallization (or avoiding) interference, so as to try hard to solve at least the above.

The content of the invention

In a first aspect, the present invention relates to a kind of communication system, the communication system includes：Network, in the first frequency Operated in band；And the communicator of the network, to be sent in announcement period for indicating the first band occupied Notification signal and for indicating the occupied notification signal of second band, second band described here includes the described first frequency A part for band or the first band.

According to second aspect, the present invention relates to a kind of communicator of network, the communicator includes：Transmitter, uses With in data transfer cycle data are transmitted using second band or first band；Transceiver, to be sent out in announcement period Send for indicating the occupied notification signal of the first band and for indicating the occupied notification signal of the second band； And controller, it is used to for running to switch to the second band from the first band or switches to institute from the second band First band is stated, is used to indicate the occupied notification signal of the first band and for indicating second frequency to send With the occupied notification signal.

In the third aspect, the present invention relates to a kind of method of coordination network running, methods described includes：In the first frequency band Running network；And sent in announcement period for indicating the occupied notification signal of the first band and for indicating the The occupied notification signal of two frequency bands, second band described here includes of the first band or the first band Point.

Brief description of the drawings

In the accompanying drawings, identical reference symbol typicallys represent identical part in all different views.Accompanying drawing may not It is drawn to scale, but be generally focused on and exemplify principle of the invention.For clarity, the size of various features/element can Can be arbitrarily expanded or reduce.In the following description, various embodiments of the present invention will be illustrated with reference to the following drawings.Accompanying drawing It is as described below.

Fig. 1 is shown such as in IEEE P802.11ad/D2.0 standards " the 11st part in March, 2010：Wireless LAN Medium Access control (MAC) and physical layer (PHY) specification amendment 5：Improve the high throughput (Part11 in 60GHz frequency bands： Wireless LAN Medium Access Control(MAC)and Physical Layer(PHY)Specifications Amendment5：Enhancements for Very High Throughput in the60GHz band) " in defined Training time (A-BFT), bulletin time (AT) are molded and in data transfer by Beacon Periods (BTI), united beam Between the cycles (CBAP) based on competition of two in (DTT) and two beacon interval (BI) structures of seeervice cycle (SP) composition Example.

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

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

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

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

Fig. 5 shows and control the frequency band of MAC technologies to draw according to the dynamic bandwidth of each embodiment.

Fig. 6 shows the example of hiding personal Basic Service Set central point/access point (PCP/AP) problem.

Fig. 7 (a) shows according to each embodiment, the PCP/AP1 operated in big frequency band and adds the network of PCP/AP1 Station (STA) or device (if having successfully started up new network in small frequency band, it is described station or device be hereinafter referred to as PCP/AP2 example), and ask for the existing big channel used by existing network to split into what is operated in two smaller frequency bands Two networks.

Fig. 7 (b) to show and be spaced (virtual beacon interval with virtual beacon according to each embodiment； ) and small frequency band beacon interval (small band beacon interval VBI；The example of MAC structures SBBI).

Fig. 7 (c) shown according to each embodiment, in network without PCP/AP2 in having detected adjacent small frequency band, PCP/ AP1 how the example by its network bandwidth from small bandspreading into big frequency band to be operated.

Fig. 8 (a) shows the DBand beacon frame formats that can be used in the frame of interior transmission during NP according to each embodiment.

Fig. 8 (b) shows the DBand beacon frame main bodies according to each embodiment.

Fig. 8 (c) shows the beacon interval control for the frame of interior transmission during NP according to each embodiment.

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

Fig. 9 shows a kind of schematic block diagram of the coordination network operation method according to each embodiment.

Specific embodiment

Carry out referring to the drawings described further below, accompanying drawing is shown by way of illustrating can put into practice of the invention specific thin Section and embodiment.These embodiments are set forth in enough so that those skilled in the art can put into practice the present invention.Not Change can be made using other embodiments and in structure and in logic in the case of the scope of the invention.Each embodiment may not It is mutually exclusive, because some embodiments can combine to form new embodiment with one or more of the other embodiment.

For make the present invention it can be readily appreciated that and be actually achieved, now by unrestricted mode reference by way of example Accompanying drawing illustrates specific embodiment.

Fig. 2 shows the exemplary summary of media access control (MAC) protocols/specifications 200, and MAC protocol/specification 200 is wrapped Include the protocols/specifications for following aspect：Divide or division channel (or frequency band) 202, combination or merging channel (or frequency band) 204th, network running is moved to one other channel (or frequency band) 206, communication terminal from a channel (or frequency band) and adds channel In existing network 208, communication terminal start in the channel new network 210, by share band come notice coordinate believe Number transmission 212, make notification signal fidelity 214 in shared band and make the silence period in network in each channel Middle synchronization 216.

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

MAC protocol 200 can support the logic channel (frequency band) of the number higher number than can use big channel, and can be Start network according to frequency band plans when channel is available.

Additionally, when dividing or dividing channel (or frequency band) 202, big channel (or frequency band) can be divided into many small channels (or frequency band), i.e. logic channel, so that many networks can be changed into what can be operated.Term " big channel used herein (large channel) " and " small channel (small channel) " are relative.Big channel is inherently than small channel The broader bandwidth of bandwidth.For example, the bandwidth of big channel can be but be not limited to small channel bandwidth twice (or double) or for small Three times of the bandwidth of channel or four times of bandwidth for small channel or five times etc. of the bandwidth for small channel.

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

When combining or merging channel (or frequency band) 204, whenever data rate higher is capable of achieving, it is carried out some small The combination of channel is forming big channel.For example, this can work as when another network operated in small frequency band decommissions occurring.

Additionally, whenever data rate higher is capable of achieving, being carried out the combination of some big channels to form bigger letter Road.For example, this can work as when another network operated in big channel decommissions occurring.

Want the communication terminal that comes into operation in the channel or network equipment can in the channel to same type or Different types of existing network is detected (for example, the agreement of the existing network 208 such as in channel is added for communication terminal In), and communication terminal starts new network (for example, such as starting new network in the channel for communication terminal in the channel In 210 agreement) and this existing network can be added or another channel is moved to (for example, such as network to be operated from one Individual channel (or frequency band) is moved in the agreement of another channel (or frequency band) 206).

Communication terminal or network equipment can also be avoided to existing net when new network equipment will start the running of new network Any potential interference of network.For example, such as believing for carrying out notice coordinate via the quasi- nodirectional beacon cycle in shared band Number transmission 212 agreement in, can avoid in shared band or in other the specified bands for thering is device to operate Communication between the middle device because in heterogeneous networks and the conflict that may occur.In this context, shared band can quilt Referred to as shared band channel.

In the agreement of the notification signal fidelity 214 in for making shared band, transported in other channel bands Silence period can be set up in the network of work, in the silence period, the device in their own network suspends temporarily All transmission in the band of their own network.

For making the silence period in network in each channel in synchronous 216 agreement, can be by shared spectrum Band in or the device in other the specified bands for thering is device to operate in heterogeneous networks between communication come realize with Lower purpose：When two or more Network Synchronizations are operated, the silence period of separate network is synchronized.

In a first aspect, as shown in Fig. 3 (a) and Fig. 3 (b), there is provided a kind of communication system.In Fig. 3 (a), communication system System 300 includes：Network 302, to operate in the first frequency band；And the communicator 306 of network 302, to notify week It is interim send for indicate the occupied notification signal of the first band and for indicate second band it is occupied notify letter Number, wherein second band includes a part for first band or first band.

For example, first band can be but be not limited to the frequency band 304 of Fig. 3 (a).Second band can be but be not limited to Fig. 3's (a) Frequency band 310.

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

In the context of each embodiment, term " communication system " refers to be for what device herein provided communication service System.Communication system can be that can carry out the wirelessly or non-wirelessly communication of any kind type of information transmission or telecommunication system.In each reality Apply in example, communication system 300 can be wireless.

Term " communicator " can refer to the machine for auxiliary data transmission (sending and/or receive data message).Cause This, communicator is generally also referred to as node.Communicator 306 for example can be but be not limited to stand or movement station (mobile station；) or substation (substation) or port or mobile phone or cellular phone or access point or individual MS Basic Service Set central point etc..

In one embodiment, communicator 306 may include access point or personal Basic Service Set central point or piconet Telegon (piconet coordinator).

Multiple communicators are referred to alternatively as multiple access points or multiple individual's Basic Service Set central points or multiple piconets Telegon.In certain example, communicator can be non-access point or non-coordinator.

Term " network " used herein typically refers to cordless communication network.For example, network 302 can according to The communication network of 802.11 communication standards or CWPAN communication standards or DBand communication standards.Term " network " is also included for inciting somebody to action Any method or medium of the information from a node-node transmission (or reception) to another node.Network 302 is by logical between node Letter is connected and formed." communication connection " can generally refer to the chain for providing information transmission between a node and another node Connect.In this context, term " DBand communication standards " or DBand networks refer in previous 802.11ad draft standards The DBand of presence.

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

Term " running " used herein 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 It is referred to alternatively 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.Go up herein Hereinafter, the width of the frequency range (or frequency band) for definitions of bandwidth being used by electronic signal on given transmission medium, The given transmission medium can be wireless medium.Bandwidth can be expressed as highest frequency component of signal and low-limit frequency component of signal Between difference.First band or second band are alternatively subchannel.

Term " notification signal " used herein refers to the signal for informing or notifying other devices." notify letter Number " refer to signal of communication.Notification signal can be message, and the message can be from entity (node) (such as communicator 306) it is sent to the short of at least another entity (node) (such as another communicator in another network (such as network 312)) Information.Notification signal can be the cluster of bag (packet) or cluster (cluster) or bag.

For example, notification signal may include the data of the Accurate for being sent by node and being received, and request, report can be represented Accuse or event.The notification signal may be included in another signal or another notification signal, or may be encoded in another signal or In another notification signal, or can be instructed to out in another signal or another notification signal.

Term " transmission " can refer to but be not limited to transmit or broadcast.In this context, communicator 306 may include to send out Send the transceiver of sound or data, services.In this context, term " transceiver " refers to combined type emitter/receiver.Example Such as, transceiver can be the transmitter and receiver for being combined into single package.In general, transceiver includes transmitting and receives Two kinds of abilities and function.

Term " broadcast " refers to send out notification signal (it can be beacon) from a node of overlying regions, that is, send To the whole being located in the region or multiple communicators (for example using same radio communication technology, for example according to same Communication standard, and as the part with the communication terminal or the network of communicator identical network).It is used herein " multiple " communicator can refer to the subset of the communicator or terminal in network.

Term " announcement period " refers to the time period for sending notification signal distributed in communication protocol.

Term " instruction " used herein includes but is not limited to specify, show, imply, disclosing, notifying, announcing or Registration.

Term " occupied " refers to the frequency band for having at least one network to operate wherein.In some contexts, term " quilt Take " it is referred to alternatively as " wearing " or " unavailable ".

Each embodiment can relate to dynamic bandwidth control media access control (MAC) agreement, and the agreement is used for by circulation (recurring) quasi- nodirectional beacon frame solves the coexistence problems of network operated in overlapping spectral band, with network The message of presence is announced to wanting in sharing and accessing spectral band (common access frequency spectrum band) Start the consolidated network type of network running or another new traffic terminal (or device) of different network type.Learn existing network After operating, device can be mitigated between network according to its ability using number of mechanisms (for example, MAC protocol 200 of Fig. 2) Interference, for example by running switch to other frequency bands (for example, Fig. 2 for network running to be moved from a channel (or frequency band) Move to the agreement of one other channel (or frequency band) 206), add existing network (for example, Fig. 2 for communication terminal add channel In existing network 208 agreement), utilization space beam forming or only hold off.

Existing network is added on device, described device can add the existing network in band sharing, or can be added in Reside in band sharing or the channel band that is overlapped with band sharing in one of the existing network that operates.As other one Kind of selection, if can be if, device can be firstly added the existing network in band sharing, and request currently accounts for existing network Band splitting into two small frequency bands (for example, agreement for dividing or dividing channel (or frequency band) 202 of Fig. 2), with only The new network of self-starting.This new equipment can with existing network be consolidated network type, or this new equipment can with frequency band in it is existing Network is different network type.For being detected by another existing network in adjacent small frequency band in small frequency band in the absence of existing Network simultaneously extends with can be with Fig. 2 by the MAC protocol of band recovery to shared band remaining existing network in the small frequency band It is the same for combining or merging the agreement of channel (or frequency band) 204.Additionally, the purpose of the present invention is to avoid wanting in shared light The interference caused by other potential networks started in bands of a spectrum, the shared band is just accounted for by the network operated in small frequency band With.

As described herein, the 60GHz frequency bands that will exempt to authorize use the non-limiting case study as exemplary.So And, it should be appreciated that the MAC protocol 200 including various embodiments of the present invention of Fig. 2 can be easily extended to any frequency band with similar Other of network running use model.

In embodiments, the communicator 306 of network 302 is configurable to for running to switch to second from first band Frequency band, or first band is switched to from second band, to send for indicating the occupied notification signal of first band and being used for Indicate the occupied notification signal of second band.

Term " switching " used herein can refer to and change between the two states.The switching can depend on communication system In system the need for various devices and network or can be according to agreement (such as the MAC protocol 200 of Fig. 2).

In one embodiment, from first band to the running of second band or from second band to the running of first band Cyclically perform.This means that the switching can be reversible and/or can repeat.

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

Term " shared band channel " used herein refers to by the more than one Web vector graphic in communication system Frequency bandwidth.Only illustratively property example, if network A is operated 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, then channel CH2 be network A with The band sharing channel of network B.

Term " shared band channel " can refer to the channel or channel for wherein having multiple networks in running.Shared frequency band letter Road (such as frequency band 310) may include multiple channels and/or subchannel.In communication system (such as communication of Fig. 3 (a) and Fig. 3 (b) System 300) in, there may be the shared band channel of more than one.In shared band channel, there may be with overlapping frequency The channel of band.

In this embodiment, announcement period may include the circulation time followed the trail of in the second frequency band by timer (timer).

Term " circulation time " used herein refers to completing required for one or more are circulated or measured Time.Timer is for monitoring and following the trail of the device of time (hardware) or algorithm (software program).For example, timer can be The internal clocking or timer of communication system.

In various embodiments, first band can be shared band channel.Announcement period may include to be existed by timer The circulation time followed the trail of in first band.

In embodiments, the communicator of network is configurable in protection interval (guard interval) to transport Make to switch to second band from first band or switch to first band from second band.

In the context of each embodiment, term " protection interval " is the time period, and interior during the time period, device is each From network in do not carry out data transmission.

In embodiments, multiple devices of network are configurable in data transfer cycle using having network wherein The first band or second band of running transmits data.In " data transfer cycle ", can be by device in respective network Carry out data transmission.

In certain embodiments, the communicator 306 of network 302 is configurable to when the multiple dress in network 302 Put when the data transfer in respective first band or second band has been suspended in silence period, send for indicating first The occupied notification signal of frequency band and for indicating the occupied notification signal of second band.

Term " silence period (quiet period) " used herein can refer to data-transmission interruptions wherein occur Time period.In other words, there is the interim pause of data transfer.For example, silence period may include announcement period.

In embodiments, communication system 300 may also include：Another network, to be operated in the 3rd frequency band；And institute The communicator of another network is stated, to be sent in another announcement period for indicating the occupied notice of the 3rd frequency band Signal and for indicating the occupied notification signal of the second band, here second band include the 3rd frequency band or the 3rd A part for frequency band.

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

Term " network ", " running ", " frequency band " " communicator ", " notification signal ", " instruction " and " announcement period " are as above Defined in text.

In an example, network and another network can be same type.In another example, network can with another network It is different type." type (type) " of network can be defined by the communication standard used by network.For example, network can be CWPAN types or DBand types.Same type of network can be CWPAN networks and another CWPAN networks in frequency band.By contrast, Different types of network can be CWPAN networks and DBand networks in frequency band.Term " DBand networks " is as hereinbefore defined.

In embodiments, network 302 and/or another network 312 may each comprise Chinese wireless personal domain network (CWPAN) network.In some instances, network 302 and/or another network 312 may each comprise DBand networks.

In embodiments, announcement period and another announcement period are the continuous cycles.

Term used herein it is " continuous " for illustrate one and then another.In an example, continuously Announcement period can partly be overlapped with another announcement period.In another example, continuous announcement period and another announcement period Between can have gap.

In embodiments, the notification signal of another network is included for making another network same with the network The timestamp of stepization.

Term " timestamp " used herein may be used to indicate temporal information (such as date or time), when described Between item of information be used for define it is relevant with the origin in the time reference for giving and with signal (for example, the data unit such as image, One group of data) a part associated time (or temporary position).The purpose for only illustrating, for example in the video sequence, when Between stamp can position associated with each image and with this image in the sequence it is corresponding.When timestamp can be based on but be not limited to Between stab parameter, for example：Timestamp accuracy (reach by the second point or hour in units of)；The amplitude of timestamp；For detecting The minimum interval size of (or decoding latency)；Error robustness；And the information for needed for each image carries out timestamp coding Size.

In certain embodiments, the communicator of another network is configurable to when the multiple devices in another network When having suspended the data transfer in the 3rd frequency band in another silence period, send occupied logical for indicating the 3rd frequency band Know signal and for indicating the occupied notification signal of second band.

In one embodiment, the silence period occurs simultaneously with another silence period.In other words, it is described to mourn in silence Cycle occurs with another silence period in the same time.For example, for continuous announcement period, if silence period begins In time A and the time B that arrives, wherein time A and time B be random time value, then another silence period will also start from time A and To time B.In another example, for discontinuous announcement period, if silence period starts from time A and the time B that arrives, and Then start from time C and the time D that arrives, wherein time C and time D are also random time value, then another silence period will also begin Arrive in time A and time B and then start from time C and the time D that arrives.This kind of silence period and another silence period While in coming across discontinuous announcement period and continuous announcement period.

As example, the dynamic bandwidth control technology considered in CWPAN is described below.Assuming that to the occupancy of channel It is to be based on arriving first the basis for first obtaining.If network is operated in the channel, then the device from another type network can not be at this Start its running in channel.For example, the network can be the network 302 of Fig. 3 (a) and Fig. 3 (b), the channel can be Fig. 3 (a) Frequency band 304, and the device from another type network can be Fig. 3 (a) communicator 314.

Assuming that there is a kind of mechanism that can realize this function.Also assume that the network equipment can detect showing for its own type There are the beacon of network and the beacon of another type of existing network.Moreover, it is assumed that the network equipment not only can in big frequency band but also Can be operated in small frequency band, and another type of network equipment can be operated only in big frequency band.Additionally, the network equipment can be Operated in the network of its own type and in another type of network.

In particular instances, big frequency band can be but be not limited to second band；And small frequency band can be but be not limited to first band.

In some instances, using for by small channel and unappropriated small combining channel into big channel or will frequency greatly The MAC algorithms that band is divided into two or more small frequency bands can refer to comprising the combination in Fig. 2 or merge channel (or frequency band) 204 and the MAC protocol 200 comprising the division in Fig. 2 or division channel (or frequency band) 202.

" dividing/division " 202 and " combination/merge " 204 are the non-permanent states of channel, that is to say, that divided Channel can be combined finally with another channel, or combined channel can finally be divided into single channel.These states can be The state of circulation.

" dividing/division " channel or " combination/merge " channel refer to the channel after channel bandwidth change.Term " afterwards " It refer to the succeeding state of channel.

When new network equipment is wanted to divide or be divided into small channel existing network from big channel, the new network equipment The existing network will be firstly added.This device then sends command frame to the personal Basic Service Set center of the existing network Point/access point (PCP/AP) asks to carry out channel division.Request data frame be used to carry out channel division or channel is divided.Such as Fruit existing network determines for its big channel to be divided into small channel, then it informs its in a network complete by its beacon times Part device (including that requesting party's device) is being operated channel-changing into small running channel.Channel can in a beacon be used Switching notice information element (information element；IE) new small channel is switched to announcing.Also can be by response data Frame is sent to the desired requesting party's device for starting new network.Then, existing network suspends it in big channel after a time period In running.Time period can be predetermined amount of time.Then, MAC associations illustrated as described above and in Fig. 2 are reached During the specified stand-by period of view, existing network continues its running and carries out required program in new small channel as new network. For example, beam forming, joint, for seeervice cycle (service period；SP) and based on the cycle for competing (contention-based period；CBAP new arrangement) etc. is probably applicable.

The requesting party for wanting to start another new network is installed on waiting before starting the running of its network in its small frequency band The specified stand-by period of MAC protocol as described above.Requesting party's device needs to listen to channel in the beacon of existing network Switching bulletin IE.As notified by the IE in its beacon as the existing network in existing big frequency band, requesting party's device Its running will be started in small frequency band as the new PCP/AP of new network.Want to add this new network in another small channel Other devices can be added by standard beam forming and joint program.

In small channel operate network PCP/AP when the network in its adjacent small frequency band decommissions to being possible to Big channel is used to form to perform channel detection with carrying high performance adjacent small channel periodicity.If detecting the adjacent of sky Small channel, then PCP/AP can decide whether to want by its small channel expansion into big channel.If existing network is determined its small letter Road is extended to big channel, then notify its all devices in a network to be operated channel-changing by its beacon times Into big running channel.Channel switching notice information element (IE) is available to switch to new big letter with announcement channel in a beacon Road.Then, existing network suspends its running after a period of time.Then, existing network as new network continue its running and Required program is carried out in new big channel.For example, beam forming, joint, for the seeervice cycle (SP) and based on competition cycle (CBAP) new arrangement etc. can be what is be applicable.

For example, by the specified device of each network of running in respective channel band in band sharing channel or shared The notification signal being coordinated sent in spectra channels (such as the frequency band 310 of Fig. 3 (a)) will can be used to form shared access frequency spectrum A part for band (or being referred to as sharing band or band sharing channel) is overlapping with a part for shared access spectral band The network of the device of running is taken into account in channel band, and the shared access spectral band is multiple homogeneities or heterogeneous wireless network Legal band (legitimate spectrum band) in network.For formed share access spectral band a part or The example of the network of the device operated in the frequency band overlapping with a part for shared access spectral band can be Fig. 3 (a) in network 302nd, the communication terminal operated in 312.

Can specify that the device in same type of these networks can be in communication with each other and for by new netinit Procotol meet claimed below：

I) specified device or communication terminal of small frequency band www.chinanews.com network (network 302 of such as Fig. 3 (a)) (are usually controlled Terminal, this can be the communication terminal 300 of such as Fig. 3 (a) or Fig. 3 (b)) know in the interior institute for operating of a part for sharing band There is the presence of pre-existing network.

Ii) specified device of new network can be got down to by adding existing network or by the shared light in existing network Notification signal is listened in bands of a spectrum or is maintained and the coordination of the specified device of existing network and synchronous by other means.For example, This kind of coordination and it is synchronous may include Fig. 2 by sharing band come the transmission 212 of notice coordinate signal and making in network Silence period is synchronous 216 in each channel.

Iii) specified device of new network starts the new net after being intended to be conveyed to the control terminal of existing network Network.

In the channel band for forming a part for shared band or being overlapped with a part for band together The network of running has specified device (usually PCP/AP or piconet coordinator (piconet coordinator；PNC)), The specified device has following required ability：The intermittent of circulation being coordinated is sent out in band is shared and notifies letter Number announcing for forming a part for shared band or together with other channel bands that the part of band is overlapping In have network running；And have other in similar channel frequency band to detect by the notification signal sent in big frequency band Network is in running.These burst transfers (burst transmission) of notification signal outside channel have following characteristic：

I) it is recognizable for the device operated in shared access band using different wireless technologys. Signal of communication generally in different technologies beacon frame form or in can be used in many homogeneities or heterogeneous wireless technology Form, to indicate network to take shared band or indicate two or more mixture of networks to take for forming shared spectrum A part for band or other channel bands for being overlapped with a part for band together, so as to be conducive to the net of each type network Network starts scanning imaging system and minimum change occurs.

Ii the use specified for device) should be shorter than by the duration between two continuous notification signals of device transmission Whether band occupied most short sweep time is for example shared in judgement.

Term " big frequency band/channel " used herein and " small frequency band/channel " are relative.Big channel (or frequency band) Inherently than the broader bandwidth of bandwidth of small channel (frequency band).For example, the bandwidth of big channel can be but be not limited to small channel The twice (or double) of bandwidth or four times of three times of bandwidth for small channel or the bandwidth for small channel or be small channel Five times of bandwidth.

Additionally, the dress for the transmission notice signal in shared channel band in for specified device or each network Silence period interior during putting the distributed time, can setting up in each network, in the silence period, the institute in its network There is device to suspend all transmission in the channel band of their own network.Therefore, in the silence period phase of each network It is interior, only allow the specified device of each network transmission notice in shared band (outside the channel band of i.e. each network) Signal.Consequently, it is possible to the notification signal fidelity 214 made in shared band of Fig. 2 can be realized.

The specified device of each network switches between following state：One be when being operated in their local network, The transmission carried out in the channel band of themselves, two be share band in carry out notification signal transmission, with And transmitted notification signal is listened in share band to the specified device by other networks.By specifying for each network Device is denoted as the announcement period (notification of each network in band sharing for the time period of transmission notice signal period；NP).For single running network, silence period and announcement period can co-locateds and can be with similar but have difference Different duration, the difference is to make the running of specified device between the channel band of their network uses band together Switch over or switch the required time in turn.

Term " co-located (co-located) " used herein refers to and is oriented to be substantial access to or by fixed together Position.

If there is the network that two or more are operated simultaneously, then the silence period of each network should extend must include institute There is the announcement period of existing network.The all different silence period of existing separate network can be coordinated and them are synchronized, So that whenever specified device transmission notice signal in heterogeneous networks, the every other device in these networks is in each of which Network in all suspend their transmission, this duration is denoted as silence period here.

Additionally, coordinating the notification signal of heterogeneous networks so that will not clash.It should be noted that the notice letter of heterogeneous networks Number transmission needs not to be continuous and silence period also needs not to be continuous.However, this kind of distribution is good, hereinafter will knot The MAC protocol in the transmission of quasi- nodirectional beacon frame is shared these benefits are expanded on further.

Frequency and relative position of the notification signal in each network can be (i) it is fixed and for different homogeneities or different By standardized for matter wireless technology；Or for (ii) is fixed and one of specified device by network determines；Or be (iii) one of dynamic and by network specified device is set up.

To maintain the coordination of silence period and the coordination of notification signal that is synchronous and being sent in band is shared, while The specified device of each network operate but in independent network should be able to keep synchronized with each other.

Synchronization need by one of specified device of network be appointed as Synchronization Control terminal and need using following methods it One：

I) make other specified devices synchronous with described by receiving timestamp in the broadcast of the Synchronization Control terminal Control terminal is interior during its NP to be synchronized in band is shared.

Ii) other specified devices for other networks operated in their own small frequency band are in the Synchronization Control terminal Local channel frequency band in periodically listen to the broadcast of the Synchronization Control terminal.

Term " local (native) " used herein can generally refer to " original " or " initial ".

In embodiments, notification signal may include beacon interval.Notification signal can be indicated for the 3rd frequency band quilt The notification signal of occupancy can be indicated for the occupied notification signal of second band, or can be indicated for first The occupied notification signal of frequency band.For example, beacon interval can be but be not limited to the beacon interval shown in Fig. 1.

In one embodiment, beacon interval may include quasi- nodirectional beacon frame.Quasi- nodirectional beacon frame can be circulation.

Term " circulation " used herein refers to repetition.

The communication terminal of the communication terminal of network and another network is configurable to maintain to exist respectively using timer The beacon interval duration in first band and the 3rd frequency band.

The beacon interval duration in first band and the 3rd frequency band each may include idling cycle (idle Period), network and/or another network restarting timer with before being kept for another beacon interval duration in institute Wait is up to the beacon interval duration terminates in stating idling cycle.

In the context of each embodiment, term " idling cycle " refers to the following time period：Wherein, network has completed it Running in frequency band and any action is not performed but is waited, until the beacon interval duration terminates.

Term " wait " or " waiting marquis " can refer to allows the time to pass.Term " restarting " refers to reset, for example, answer timer Position is zero, or restarts timing in the range of the time by timer, and time range described here can be known or predetermined 's.

In this context, term " another beacon interval duration " meaned relative to the beacon interval duration The new and/or different beacon interval duration of speech.

In one embodiment, first band can be obtained with the 3rd frequency band by dividing second band.

For announcement period with another announcement period, the duration of they each be able to can be drawn in second band It is divided into after first band and the 3rd frequency band the sector number (sector of the communicator from the communicator or another network of network Number) derive.

In embodiments, communication system may also include：Multiple networks, to be operated in multiple frequency bands；And it is described Each of multiple communicators of multiple networks, the multiple communicator are used to be sent in respective announcement period to be used In each of the multiple frequency band of instruction occupied notification signal and for indicating, second band is occupied to notify letter Number, second band includes a part for the multiple frequency band or the multiple frequency band here.

For example, the multiple frequency band can refer to the 4th frequency band or more frequency band.

In second aspect, as shown in Figure 4, there is provided a kind of communicator of network.In fig. 4, communicator 400 is wrapped Include：Transmitter 402, to transmit data using second band or first band in data transfer cycle；Transceiver 404, To be sent in announcement period for indicating the occupied notification signal of first band and occupied for indicating second band Notification signal；And controller 406, it is used to for running to switch to second band from first band or is switched to from second band First band, to send for indicating the occupied notification signal of first band and for indicating the occupied notice of second band Signal.

For example, communicator can be the communicator 306 of Fig. 3 (a).Term " frequency band ", " data transfer cycle ", " transmitting-receiving Device ", " transmission ", " notification signal ", " instruction ", " announcement period ", " occupancy ", " switching ", " running " can be as hereinbefore defined.

Example for illustration purpose provide for quasi- nodirectional beacon frame MAC protocol, the quasi- nodirectional beacon frame by The every CWPAN specified devices operated in small frequency band send out in big frequency band, are notified to latent with the presence of CWPAN networks New IEEE802.11ad networks or want to start the potential new CWPAN devices or new of new network in big frequency band CPWAN devices.

Using the example of the CWPAN networks described in Fig. 5, CWPAN devices can be operated in big frequency band L1 or L2, and be worked as When other new equipments ask to divide the big channel of the network in running, CWPAN devices can be in small frequency band S3, S4, S5 or S6 Middle running.IEEE802.11ad devices can be operated only in big frequency band L1 or L2.In this kind of situation, big frequency band L1 or L2 will It is the big shared band (i.e. band sharing channel) for sending quasi- nodirectional beacon frame for CWPAN specified devices.

It is set forth below following scene scheme：The CWPAN networks operated in the small frequency band for cover big frequency band can continue Realized and IEEE802.11ad networks (one or more nets by sending quasi- nodirectional beacon frame in big shared band Network) coexist.Although it should be noted that there is provided the details using CWPAN situations, the MAC protocol according to each embodiment is to illustrate , and IEEE802.11ad networks can be easily extended for other similar wireless networks.

In the first scene scheme, it is assumed that CWPAN networks are operated in L1, wherein specified device or network controller are marked It is shown as PCP/AP1.In this stage, if two kinds of technologies use similar wireless air interface, IEEE802.11ad devices The presence of CWPAN networks can easily be detected.

In the second scene scheme, it should be noted that the new equipment for being denoted as PCP/AP2 is wished by dividing bandwidth with such as Fig. 5 It is shown to form two independent networks in small frequency band S5 and S6 to share L1, it is licensed and institute in the request of the new equipment When stating new equipment and successfully starting its new network, the new equipment will become the new finger of the new network operated in small frequency band Determine device.MAC technologies are controlled according to the above dynamic bandwidth, when PCP/AP2 is intended to be operated in small frequency band, it will The bootstrap (bootstrapping procedure) in quasi- omnidirectional BTI can be passed through first so as to be used as device and (or be STA) network of the existing PCP/AP1 in big frequency band is added.Hereafter, as illustrated in Fig. 7 (a), device can be determined in PCP/AP1 L1 channels are divided into S5 channels and S6 channels when big frequency band is divided into small frequency band.PCP/AP1 should be by comprising information element (IE) License frame (Grant frame), beacon frame or bulletin frame (including be intended to a little later come the whole STA in the network for notifying it Becoming requesting party's device or the station (STA) of candidate PCP/AP or PCP/AP2) when it starts new network in small frequency band.It is described Information include the channel number related to small frequency band and in big shared band by PCP/AP1 and PCP/AP2 Send the duration of the announcement period (NP) of quasi- nodirectional beacon frame.

In a more general case, take on AP or PCP in the small frequency band of a part of big shared band is taken to make Specified device can also be embedded in these information in the quasi- omnidirectional's frame broadcasted in big shared band, with by following Mode is come the device that helps want/determine to operate in this band：It is added in operating in big frequency band or small in big frequency band The network operated in frequency band or the presence for detecting the network or in basic network (one or more networks) scanning imaging system Found for the another of new network startup as discovery procedure by coordination and synchronized announcement period using minimum change Channel.

For between the IEEE802.11ad networks that avoid the CWPAN networks that are operated in small frequency band and operate in the big frequency band Interference, PCP/AP1 and PCP/AP2 interior during NP will periodically send quasi- nodirectional beacon frame in big frequency band, with logical Know other devices that channel (PCP/AP1 and PCP/AP2 is operated in small frequency band) is scanned in subsequent medium time, for example newly IEEE802.11ad devices or other new CWPAN devices).During NP interior transmitted quasi- nodirectional beacon frame should be as Described in IEEE802.11ad without change or have minor modifications quasi- nodirectional beacon frame form.If necessary to change, will be The details of the modification is illustrated in part below.

The problem of the hiding PCP/AP shown in reply Fig. 6, every PCP/AP interior during NP should be passed in quasi- omnidirectional's mode Defeated beacon frame.For example, PCP/AP1 and PCP/AP2 can be in corresponding transmission range (transmission range；TR in) mutually Hear, and being located at that device for being denoted as device A in the TR of PCP/AP1 but outside the TR of PCP/AP2 can not listen to To any beacon frame from PCP/AP2.Similarly, in the TR of PCP/AP2 but being labeled outside the TR of PCP/AP1 For another device of device B is unable to any beacon frame of the uppick from PCP/AP1.Then, because PCP/AP2 is to device A Hiding and PCP/AP1 is hiding to device B, so both PCP/AP1 and PCP/AP2 should periodically be passed during NP Defeated each frame is covered with ensuring the space of maximum.

NP in the circulation distributed by different PCP/AP should continuously be set without compartment of terrain；Therefore they will With identical circulation time.This kind of setting enables that PCP/AP1 and PCP/AP2 are minimized between small frequency band and big frequency band Bandwidth switching surfaces.Every PCP/AP only need to switch to big frequency band (sharing band) once from the small frequency band of its own, with Interior its quasi- nodirectional beacon frame of transmission and then from another PCP/AP quasi- nodirectional beacon frame is received during NP, and then follow each Its small frequency band is switched back in ring.It should be noted that big switching between frequency band and small frequency band and between small frequency band and big frequency band Time depends on the implementation method of radio frequency (RF) circuit.Its typical duration is about hundreds of microseconds.

The length of any NP depends on frame length and section sum, and related PCP/AP is by whole DBand antennas institutes group The transmission zone of conjunction is scanned middle total using the section, i.e.

The length of the section sum × frame of the length=PCP/AP of NP

Here, section sum can be interior by between PCP/AP devices and its device or station (STA) during the addition stage Ability information is exchanged and obtained, and frame length can be obtained by being calculated the essential information for needing the interior transmission during NP. Therefore, PCP/AP1 and candidate PCP/AP (or hereinafter referred to as PCP/AP2) can easily by learning PCP/AP or candidate The sector number of PCP/AP calculates each NP duration (such as NP1 and NP2 as shown in Fig. 7 (b)), and then will be big Band splitting is into the total duration for deriving NP after smaller frequency band before they start transmission.Fig. 7 (b) is shown according to each The frame structure of embodiment.

Additionally, to eliminate the interference between frequency band, it is necessary to keep the synchronization of NP.It is to tackle because of the clock between two PCP/AP (clock offset) and the time drift (time drift) that causes partially, PCP/AP must be during every NP periodically Synchronize.This can be by time synchronization function (the time synchronization that are defined in IEEE 802.11 function；TSF) realize, wherein PCP/AP2 during the NP (i.e. NP1) of PCP/AP in from PCP/AP1 receiving frames.NP1 can It was transmitted before the NP (i.e. NP2) of PCP/AP2, the interior each frame sent by PCP/AP1 must be included and is used for during the NP2 Make the synchronized timestamp informations of PCP/AP2.As seen in Fig. 7 (b), square frame 700 represents NP1 and ensuing square frame 702 Represent NP2.Total NP duration is the summation of NP1 and NP2.

Smallest synchronization cycle of the periodicity of NP as needed for the PCP/AP operated in small frequency band transports with big frequency band Both maximum channel sweep times needed for the PCP/AP of work determine.For example, in IEEE802.11ad, when minimum channel is scanned Between be set equal to maximum BI duration, i.e. MinChannelScan=MaxBIDuration=1000 chronomeres (time unit；TU).Therefore, the circulation time of NP can not be set to be greater than 1000TU.Under above-mentioned limitation, during the actual cycle of NP Between should be determined before a NP by PCP/AP1.

When the big bandwidth of division is started (or equivalent to the last BI operated in big frequency band at the end of), every PCP/AP New Timing Synchronization function (Timing Synchronization Function should be started；TSF) followed the trail of with big frequency band The circulation time of NP.Obviously, periodicity NP is to periodically send out quasi- nodirectional beacon frame aspect in big frequency band to have with BI Similar time structure.However, the difference of periodicity NP and real BI mesh.Therefore, the circulation time of NP be defined as such as Fig. 7 Virtual beacon interval (virtual beacon interval shown in (b)；VBI)704.The value quilt of VBI704 duration Be considered as the value of BI, with during being NP it is interior it is transmitted go out beacon frame in update BI Duration fields.

On the other hand, every PCP/AP should start new TSF timers to keep the BI duration 706 in small frequency band (referred to as SBBI).Remaining program for the running in small frequency band should be identical with remaining program in big frequency band.

In every NP, each frame is transmitted in quasi- omnidirectional's mode in big frequency band by corresponding PCP/AP.Such as in Fig. 8 (a) Finding, the field for being included of beacon frame is listed as follows：

- frame control field 800, comprising protocol version, type, subtype, control frame extension etc..

- Duration field 802, was set to retain always until the time of the end of last NP.

- BSSID fields 804, the BSSID comprising BSS.The main body of interior transmitted DBand beacon frames is included during NP Listed element in Fig. 8 (b), the element includes that timestamp, section are scanned, beacon interval, beacon interval are controlled and DBand Parameter.

- VBI duration, the circulation time comprising NP.The BI duration should be updated in beacon interval field.

- in beacon interval control field, created by using the bit for being retained with 2 newer fields of bit- CWPAN channel widths, to meet the channel width information for CWPAN devices (Fig. 8 (C)).The exemplary of CWPAN channel widths Feature is shown in Fig. 8 (d).

After NP, PCP/AP1 and PCP/AP2 is operated the small frequency band that their own is switched to from big frequency band.For true Protect PCP/AP1 and PCP/AP2 have time enough successfully process the frequency band switch, by be denoted as protection interval (GI) when Between section be inserted between the starting point of the BI of NP and small frequency band.The information of GI can be obtained from the parameter information of device.It should be noted that because The diversity of hardware, PCP/AP1 may have different GI from PCP/AP2.In Fig. 7 (b), it is assumed that by big band splitting into After two small frequency bands, PCP/AP1 is operated in S5 and PCP/AP2 is operated in S6.It is also supposed that for the GI and use of PCP/AP1 It is different in the GI of PCP/AP2.Therefore, PCP/AP1 and PCP/AP2 keeps their net in their ensuing medium time Network independence.PCP/AP1 or PCP/AP2 should be according to accessible message transmission rate and required service quality (Quality ofService；) etc. QoS the length of the SBBI of BTI, A-BFT, AT and DTT length is included in its own channel being independently determined Degree.However, to make the starting point of SBBI remain same position, every SBBI of PCP/AP can be set as into following length：It is described Length is the integer factor of the VBI duration according to chronomere (TU).In small frequency band operate device TU can with or Can not be identical with the TU specified by the device that operates in the big frequency band.Consequently, it is possible to the duration of VBI can be set to TU Non-prime (non-prime number).

Another example be the GI duration selection be not dependent in RF circuits frequency band switching hardware embodiment Change.Selection can meet the value of worst situation.Therefore, the same time that PCP/AP1 and PCP/AP2 can be after and then NP opens Begin their SBBI.

To periodically carry out NP, every PCP/AP should be as the next of the silence period (QP) as shown in Fig. 7 (b) Before the transmission of NP SP is distributed at the end of the DTT of last SBBI.The duration of the SP for being distributed cover described two NP with And GI before the NP of the described two PCP/AP as shown in Fig. 7 (b) and afterwards.

In the 3rd scene scheme, it is contemplated that following situation：The network set up in S5 and S6 and then these networks One of be finally stopped its network running situation.When the PCP/AP detections for stopping network running not from adjacent small frequency band During interior transmitted any quasi- nodirectional beacon frame, learnt by another PCP/AP operated in adjacent small frequency band to during NP One of PCP/AP operated in small frequency band missings.The possibility of frame is lost to prevent, another adjacent PCP/AP is being determined Network stopped network running before, PCP/AP wait the MaxExpireDuration duration, the duration be VBI Integral multiple, and start from the moment that the last frame from another PCP/AP is received.

Hereafter, PCP/AP continue with by its bandwidth from small bandspreading to big frequency band.Fig. 7 (c) is exemplified with following situation：Its Middle PCP/AP2 is lacked in small frequency band S6, and PCP/AP1 prepares to be operated bandwidth from current in MaxMergeInterval Small frequency band S5 expand to big frequency band L1 to improve network performance.

Similarly, if PCP/AP1 is lacked in small frequency band S5, PCP/AP2 prepares in MaxMergeInterval It is big frequency band L1 by its bandwidth expansion.

In the third aspect, as shown in Figure 9, there is provided a kind of method of coordination network running.In fig .9, method 900 is wrapped Include：902 are operated in the first frequency band；And the instruction occupied notification signal of first band and instruction are sent in announcement period The occupied notification signal 904 of second band, wherein second band include a part for first band or first band.

Term " network ", " frequency band ", " running ", " transmission ", " announcement period ", " notification signal ", " instruction ", " occupied " As hereinbefore defined.

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

Method 900 may include media access control (MAC) method.

In embodiments, methods described may also include：Another network is operated in the 3rd frequency band；In another announcement period In will indicate the occupied another notification signal of first band and indicate the occupied notification signal of second band to send to another The communicator of network, wherein second band include a part for the 3rd frequency band or the 3rd frequency band.

In one embodiment, sending notification signal and another notification signal 904 may include：In different time sections second The notification signal and another notification signal are broadcasted in frequency band or first band, to coordinate the notification signal and described another The broadcast of one notification signal.

Term " broadcast " is as hereinbefore defined.Term " coordination " refers to arrangement or arranges.In this context, coordinate to provide The order of broadcast, so that each notification signal will not be collided with each other in their own transmission.

In another embodiment, method 900 may also include determining that the availability of second band or first band.

Term " availability " refers to unoccupied.

In embodiments, determining the availability of second band may include：Scanning second band reaches predetermined amount of time, wherein The predetermined amount of time is at least the duration of announcement period and another announcement period.

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

Illustratively property example, related bandwidth merging treatment is described below：

If PCP/AP1 (or PCP/AP2) purposes its channel width, it transmits beacon frame or in AT in BTI Middle transmission bulletin frame, and notify whole non-PCP/AP STA in the SBBI of the term of validity for extending MaxMergeInterval Terminate or switch to big frequency band L1 before terminating.It should be noted that interior during the merging time, PCP/AP1 (or PCP/AP2) continues Frame is transmitted in its NP for having arranged.However, its can be in last SBBI NP terminate after do not switch back into small frequency band S5 (or S6), As shown in Fig. 7 (c).

PCP/AP can be retained in big frequency band L1, wait for idling cycle (IP) up to current SBBI terminates, and then The BI, such as Fig. 7 (c) for restarting timer to start new by setting new TSF timers in subsequent medium time It is shown.Alternatively, PCP/AP can terminate at the end of NP current SBBI and in ensuing medium time Big frequency band is neutral to be the new TSF timers of new BI restartings, or PSP/AP can be whole after big frequency band is switched in GI Only current SBBI and be that new BI starts new TSF timers in ensuing medium time, without transmitting last NP. In all scenario, PCP/AP notifies the selected extension journey before channel is from small bandspreading to big frequency band of device or station (STA) Sequence.Therefore, PCP/AP1 to the smooth switching of big frequency band and continuity from small frequency band because maintaining the network not interrupted to transport Make.

If any other PCP/AP is intended to add PCP/AP1 (or PCP/AP2) before bandwidth expansion, it is from being connect The quasi- nodirectional beacon frame as transmitted by PCP/AP1 (or PCP/AP2) for receiving obtains information needed, and learns big frequency band current It is unavailable under state.Therefore, its claim frame to be sent such as its, until PCP/AP1 (or PCP/AP2) successfully terminates (complete) Bandwidth expansion and during the BTI of ensuing BI it is interior sent beacon frame in big frequency band untill.But, it is desirable to add small frequency The non-AP devices of non-PCP/ with network or station (STA) must still be adjusted to the small frequency band drafted and receive as transmitted by existing PCP/AP Quasi- nodirectional beacon frame.

If only one PCP/AP is operated in big frequency band, and is intended to become new PCP/AP and ask without device or station (STA) Ask the frequency band of big band splitting Cheng Geng little, then existing PCP/AP can not the interior distribution times during the DTT of the BI distributed for NP What SP.

According to the method for each embodiment, it is advantageous that：

- transmitted by the intermittent quasi- nodirectional beacon frame for circulating announcing in big shared band and there is network or big There is network in smaller frequency band in frequency band so that the network operated in overlapping spectra band can coexist.

- hope is being shared the device of a part for band or the whole middle new network of running by only being shared in big Quasi- nodirectional beacon frame is listened in access frequency band to detect the seizure condition of frequency band interested, this largely facilitates comparable backward Property (backwards comparability) and another network type new equipment network startup scanning imaging system minimum change Change.

- by setting up, coordinating and synchronize the announcement period in all operational networks in small frequency band, by specified device Or the PCP/AP of each network run in the small frequency band ensures the quasi- nodirectional beacon frame used in big frequency band bulletin Fidelity.

- the nodirectional beacon that is defined frame and bulletin frequency provide great flexibility, to meet identical or different existing wireless skill Art.Therefore, methods described can be easily adjusted and envision and running object with suitable for different runnings.

- one group of form of implementation of MAC protocol can be perfectly suitable for, the net of this energy effective coordination and synchronization independent work Network, with using little spending and bandwidth lose and the minimum channel between big frequency band and small frequency band as described herein Switching time carrys out the notice coordinate cycle.

- one group of MAC protocol can be effectively embodied as, this causes to divide bandwidth whenever while MAC frameworks are maintained When splitting or extending, network successfully can enter between shared band (i.e. big frequency band) and network channel frequency band (i.e. small frequency band) Row switching, the occupancy of shared band in the MAC frameworks, announced to minimum change utilize basic scanning imaging system all the time To scan the interested parties (interested party) of shared spectrum.

Each embodiment provides the method for notifying device plan to be operated in band is shared, the common spectrum Band is overlapping with multiple other channel bands or is made up of the multiple other channel bands, the multiple other channel spectrum Band may not have same band with the shared band, and be taken by multiple independent transceiver networks, and the network is at it Operated in the different channel band of network, with prevent by plan take other transceivers of the shared band without Data packet collisions (packet collision) caused by gauze network.

This method includes following content.

By the specified component of the multiple transceiver wireless network of running in other channel bands in shared spectrum The cyclic burst transmission of notification signal is carried out in band, described other channel bands are in shared band or use band together It is overlapping, wherein in channel band transmission of the specified device of each network in its local channel band with shared band In transmission between switch over so that correspondingly change channel width and/or carrier frequency.This is operated for unique MAC.

When specified device transmits quasi- nodirectional beacon frame, in other channel bands by set up silence period and Measured in shared band to ensure the fidelity of notification signal, described other channel bands are in shared channel spectrum In band or overlapping with shared channel light bands of a spectrum, the silence period of wherein transceiver wireless network is defined as the time in network Section, within the time period, all components of the network suspend all transmission in the specified band of network.

By the different specified devices in the different separate network that operates in the frequency band in frequency band notice coordinate signal Transmission avoiding the conflict between quasi- nodirectional beacon frame, and coordinate, synchronize and extend in the separate mesh operated in frequency band The different silence period of network, with by (i) share band in or (ii) wherein device can operate other refer to Determine the communication between the specified device in the heterogeneous networks in band and realize coordinating and synchronize, be except in this frequency band network Each performs device outside all frequency band networks in all devices form real wireless in band is shared Electric silence periods.

Including one group of MAC protocol, with whenever big band channel is divided into smaller frequency band or in small frequency band is detected Adjacent networks when no longer operating will smaller bandspreading into big frequency band when, it is ensured that be smoothed out between big frequency band and small frequency band Switch to realize that it is continuous that new network running or network are operated, to ensure to come the quasi- nodirectional beacon of the specified device in frequency band from childhood Transmission of the frame in big frequency band keeps coordinating and continuous within the following time：During network in big frequency band is operated, in small frequency band Network operate during and operate or from small bandspreading into big frequency band from the handover network that big frequency band is divided into small frequency band During switching the transient period (transient period) of running.

Define a set of on MAC beacon intervals (BI) or superframe (superframe；SF) structure, the content of beacon frame, And in big frequency band transmitted quasi- nodirectional beacon frame periodic directive/guide.

Methods described is embodied as one group of form of implementation of MAX agreements, the MAC protocol is in any network in channel spectrum Before being come into operation in band, the efficient coordination of quasi- nodirectional beacon frame transmission is realized by the exchange of important information and is mourned in silence week The synchronization of phase；And property performance period association between the specified device in the different small frequency band network in big shared band Adjust and synchronize.

The continuously transmitting for quasi- nodirectional beacon frame transmission of the specified device from different small frequency band networks can be reduced at this Required channel number is switched between the small channel band in ground and big shared band.

Phrase " least substantially at " may include " lucky " and its +/- 5% variation.As non-limiting examples, phrase " A With B least substantially at identical " may include that wherein A can be at the value of B for example with B identical embodiments, or wherein A just It is in +/- 5% variation or opposite good.

Although the present invention is particularly shown and is illustrated with reference to specific embodiment, but the technology people of art Member is it should be understood that can be in the case of without departing substantially from the spirit and scope of the present invention defined by following claims to the present invention Make the various changes in form and in details.Therefore the scope of the present invention is indicated by following claims, and therefore this hair It is bright to be intended to fall within all changes in implication and the scope equivalent with claims.

Claims (34)

1. a kind of communication system, it includes：

Network, it is configured to operate in the first frequency band；And

The communicator of the network, it is configured to be sent in announcement period for indicating the first band occupied Notification signal and for indicating the occupied notification signal of second band,

Wherein described second band includes a part for the first band or the first band.

2. communication system as claimed in claim 1, wherein, the communicator of the network is configured to carry out with incision Change：Running is switched to and operated in the second band from the first band, or is operated from the second band Switch to and operated in the first band, to send for indicating the occupied notification signal of the first band and use In the instruction occupied notification signal of second band.

3. communication system as claimed in claim 2, wherein, running is switched in the described second frequency from the first band The switching that is operated in band or from the second band running switch in the first band and to be cut described in running Change is that circulation is performed.

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

5. communication system as claimed in claim 4, wherein, the announcement period is included by timer in the second band The circulation time of tracking.

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

7. communication system as claimed in claim 4, wherein, the announcement period is included by timer in the first band The circulation time of tracking.

8. communication system as claimed in claim 2, wherein, the communicator of the network is configured in protection interval Inside carry out following switching：Running is switched to and operated in the second band from the first band, or from described the Running is switched to and operated in the first band in two frequency bands.

9. communication system as claimed in claim 1, wherein, multiple devices of the network are configured in data transfer cycle It is middle to have the first band or the second band of the network using running to transmit data.

10. communication system as claimed in claim 9, wherein, the communicator of the network is configured to when the net The multiple device in network has suspended the number in the respective first band or the second band in silence period During according to transmission, send for indicating the occupied notification signal of the first band and for indicating the second band quilt The notification signal for taking.

11. communication systems as claimed in claim 10, wherein, the silence period includes the announcement period.

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

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

Another network, it is configured to be operated in the 3rd frequency band；And

The communicator of another network, it is configured to be sent in another announcement period for indicating the 3rd frequency band Occupied notification signal and for indicating the occupied notification signal of the second band,

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

14. communication systems as claimed in claim 13, wherein, the network is same type with another network.

15. communication systems as claimed in claim 13, wherein, the network is different type with another network.

16. communication systems as claimed in claim 13, wherein, the network and/or another network include China respectively Wireless personal domain network is CWPAN networks.

17. communication systems as claimed in claim 13, wherein, the announcement period is continuous with another announcement period Cycle.

18. communication systems as claimed in claim 13, wherein, the notification signal of another network includes being used for institute State the timestamp of another network and the network synchronization.

19. communication systems as claimed in claim 13, wherein, the communicator of another network is configured to work as institute When stating the multiple devices in another network and suspending the data transfer in the 3rd frequency band in another silence period, sending is used for Indicate the occupied notification signal of the 3rd frequency band and for indicating the occupied notice letter of the second band Number.

20. communication systems as claimed in claim 19, wherein, the silence period is sent out simultaneously with another silence period It is raw.

21. communication systems as claimed in claim 13, wherein, the notification signal includes beacon interval.

22. communication systems as claimed in claim 21, wherein, the beacon interval includes quasi- nodirectional beacon frame.

23. communication systems as claimed in claim 22, wherein, the quasi- nodirectional beacon frame is circulation.

24. communication systems as claimed in claim 21, wherein, the communication of the communication terminal of the network and another network Terminal is respectively configured to be maintained using timer beacon interval duration and the 3rd frequency in the first band The beacon interval duration in band.

25. communication systems as claimed in claim 24, wherein, the institute in the first band and the 3rd frequency band each Stating the beacon interval duration includes idling cycle, and the network and/or another network each are described in restarting Timer is keeping before another beacon interval duration being waited in the idling cycle until the beacon interval continues Time terminates.

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

27. communication systems as claimed in claim 26, wherein, the announcement period and described another announcement period each tool There is the following duration：The duration is to be divided into the first band and the 3rd frequency band in the second band Afterwards derived from the sector number of the communicator of the communicator or another network of the network.

28. communication systems as claimed in claim 1, it also includes：

Multiple networks, they are configured to be operated in multiple frequency bands；And

Multiple communicators of the multiple network, the multiple communicator each are respectively configured in respective notice Sent in cycle for indicate the occupied notification signal of each of the multiple frequency band and for indicate it is described second frequency With the occupied notification signal,

Wherein described second band includes a part for the multiple frequency band or the multiple frequency band.

A kind of 29. communicators of network, the communicator includes：

Transmitter, it is configured in data transfer cycle transmit data using second band or first band；

Transceiver, it is configured to be sent in announcement period for indicating the occupied notification signal of the first band and use In the instruction occupied notification signal of second band；And

Controller, it is configured to carry out following switching：Operated from the first band and switched in the second band Middle running, or running switches to the running in the first band from the second band, it is described for indicating to send The occupied notification signal of first band and for indicating the occupied notification signal of the second band.

A kind of 30. methods of coordination network running, methods described includes：

Operate in the first frequency band；And

Sent in announcement period for indicating the occupied notification signal of the first band and for indicating second band quilt The notification signal of occupancy,

Wherein described second band includes a part for the first band or the first band.

31. methods as claimed in claim 30, it also includes：

Another network is operated in the 3rd frequency band；

The occupied another notification signal of the 3rd frequency band and described for indicating will be used to indicating in another announcement period The occupied notification signal of second band is sent to the communicator of another network,

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

32. methods as claimed in claim 31, wherein, sending the notification signal and another notification signal includes： Different time sections broadcast the notification signal and another notification signal in being in the second band or the first band, To coordinate the broadcast of the notification signal and another notification signal.

33. methods as claimed in claim 31, it also includes：Determine the available of the second band or the first band Property.

34. methods as claimed in claim 33, wherein it is determined that the availability of the second band includes：Scanning is described Second band reaches predetermined amount of time, and predetermined amount of time described here is at least the announcement period and another announcement period Duration.