CN100438470C

CN100438470C - Radio communication system, radio communication control apparatus, radio communication control method

Info

Publication number: CN100438470C
Application number: CNB2005100996441A
Authority: CN
Inventors: 铃木三博; 菅谷茂
Original assignee: Sony Corp
Current assignee: Sony Corp
Priority date: 2001-05-08
Filing date: 2002-05-01
Publication date: 2008-11-26
Anticipated expiration: 2022-05-01
Also published as: CN1855861A; CN1738277A; CN1855861B

Abstract

The present invention discloses a radio communication system, radio communication control apparatus and radio communication control method. A communication terminal under the control of a wireless base station recursively has wireless base station capabilities in a parent network, constructs a daughter network within a scope of resources of the own apparatus assigned by the wireless base station, and assigns the resources to an other communication terminal under the control of the communication terminal having base station capabilities. This novel constitution allows to configure two or more networks guaranteed not to interfere each other, thereby allowing the coexistence of a plurality of personal area networks on a same frequency channel. At the same time, the novel constitution allows expanding a network area without increasing the scale of equipment.

Description

Wireless communication system, radio communication control apparatus and method

The application is that application number is 02801573.8, and the applying date is on May 1st, 2002, and denomination of invention is divided an application for " wireless communication system, radio communication control apparatus and method and computer program ".

Technical field

The present invention relates generally to realize wireless communication system, radio communication control apparatus and method and the computer program of intercommunication mutually between a plurality of radio stations, particularly under the control of specific control desk, realize wireless communication system, radio communication control apparatus and method and the computer program of net structure.

More specifically, the present invention relates generally to exist simultaneously a plurality of wireless networks a kind of wireless communication system, be used for radio communication control apparatus and wireless communication control method and computer program at each network control traffic operation of the wireless network of a plurality of conflicts.More specifically, the present invention relates to exist simultaneously a kind of wireless communication system with the identical conflicting a plurality of wireless networks of frequency band, be used at radio communication control apparatus and wireless communication control method and computer program with each control traffic operation of the identical conflicting a plurality of wireless networks of frequency band.(should be pointed out that " same frequency band " described herein comprises UWB (ultrabroad band) wireless communication technology of data being expanded transmission on ultrabroad band).

Background technology

By a plurality of computers interconnected construct a LAN (local area network (LAN)) can share the such information of for example file and data by, share the such ancillary equipment of printer for example and exchange for example Email and the such information of content-data.

Usually, employing is carried out the LAN connection based on wired mode of optical fiber, coaxial cable or twisted-pair cable.This needs installation work, thus example ground, the side of being difficult to tectonic network and make wiring complicated.After structure LAN, the moving range of device is subjected to the restriction of cable length, thereby is inconvenient to use the system that so constitutes.For the user is freed from the wired lan system of routine, WLAN has caused people's attention.According to WLAN, omitted the most of cables that in office and other working space, are provided with, thus relatively easy mobile communication terminal personal computer (PC).

Recently, because the increase of transmission speed and the reduction of cost, the demand of unlimited LAN system increases rapidly.Especially, nearest trend is to carry out information communication by the small-scale wireless network of structure between a plurality of personal electronic equipments, thereby research and development is to PAN (Personal Area Network) (PAN).For example, the PAN regulation is based on the different radio combined system of 2.4GHz and 5GHz, and this frequency band does not need the mandate through associated authorization mechanism.

For example, IEEE 802.15.3 makes the PAN (Personal Area Network) standardization with the transmission rate that is higher than 20Mbps.This IEEE department mainly promotes the standardization based on the PHY layer that uses the 2.4GHz frequency band.

In these wireless personal networks, a radio communication device becomes " telegon " as a control desk, constructs people's local area network (LAN) one by one around it in about 10 meters scope.Telegon sends a beacon signal with the predetermined cycle, and this beacon period is designated as a transmission frame period.In each transmission frame period, distribution will be by the employed time slot of the radio communication device of wireless personal network.

For this time slot allocation, the method that for example is called " guaranteed time slot (GTS) " and " dynamically TDMA (time division multiplexing) " is used, and wherein a kind of communication means is to be used for the dynamic assignment sending time slots, and guarantees predetermined transmission capacity.

For example, prepare contention access period (CAP) and no contention (CFP) by the standardized MAC layer of IEEE 802.15.3.For asynchronous communication, this contention access period is used to exchange short data and command information.For streaming communication, in no contention, carry out dynamic slot and distribute by guaranteed time slot (GTS), send thereby carry out guaranteed time slot.

Be prescribed by the standardized MAC layer of IEEE 802.15.3, so that except based on the PHY layer of 2.4GHz band signal it also be applicable as this PHY layer standard criterion and, except PHY layer, begin for standardization activity by the application of the standardized PHY layer of IEEE 802.1.5.3 based on the 2.4GHz band signal.

Recently, WLAN (local area network (LAN)) system based on SS (spread-spectrum) technology has dropped into actual use.And UWB (ultra broadband) transmission plan of the SS that is based on the such application of PAN for example that proposes recently.

DS (Direct-Spread) scheme as a kind of SS scheme multiply by an information signal by a random code sequence that is called PN (pseudo noise), expanding shared frequency range, and the signal that is obtained is sent at transmit leg; The recipient, the spread information signal that is received is multiplied by this PN sign indicating number, is used for despreading, to reproduce this information signal.In the UWB scheme, this information signal spreading ratio is maximized, and makes data for example expand on the SHF band of 2GHz to 6GHz to realize high speed data transfer by transmission/reception data being carried out spread spectrum thus.

In the UWB scheme, constitute an information signal by a plurality of pulse signal strings that use the cycle that has the hundreds of psec respectively, and send this train of signal.Its shared bandwidth is at the amount utmost point of GHz, thereby divided by its central frequency (for example pass through with occupied bandwidth, 1GHz to 10GHz) numerical value that obtains becomes 1 approximately, and this compares with used bandwidth in the WLAN that is generally used for according to so-called W-CDMA, cdma2000, SS (spread-spectrum) and OFDM (OFDM) scheme is a super wide bandwidth.

Referring to Figure 20, shown in it based on the transfer of data of UWB scheme.Input information 901 is expanded sequence 902 and expands.In some systems, omit the multiplication of this sequence spreading based on UWB.

By an information signal 903 demodulation (905) that spread spectrum obtained by the pulse signal that uses the UWB scheme.This demodulation is for example based on PPM (pulse position modulation), bi-phase modulated or amplitude modulation.

The pulse signal that is used for the UWB scheme is an extremely narrow pulse, thereby the UWB scheme is used extremely wide frequency band on frequency spectrum.Thereby in each frequency field, the information signal of being imported only has the power lower than noise level.

Received signal 905 mixes mutually with noise, but it can detect by the correlation that calculates between received signal and the pulse signal.In addition, owing in many systems, carry out signal extension, therefore be that the transmission information of a bit sends many pulse signals.Therefore, the reception correlation 907 of each pulse signal can be by the length institute integration (908) of sequence spreading, thereby further promotes to send the detection of signal.

In each frequency field, the signal of being expanded by the UWB delivery plan only has the power lower than noise level, thus coexistence of communication systems relatively easy based on each communication system of UWB delivery plan and based on other communication plan.

When considering a communication environment, wherein popularize and in office, install many various devices along with the such information equipment of for example personal computer (PC), these equipment interconnect by two or more wireless networks in narrow operational environment, therefore at identical frequency band a plurality of infinite network coexistences are arranged.Comprise the UWB radio communication system at this " identical frequency band ", its expansion on passing through the frequency band of data at non-constant width transmits data.

Use must be considered and the situation that is stored in other a plurality of wireless communication system coexistences in the same frequency band by the PHY layer standard of the standardized 2.4GHz band signal of above-mentioned IEEE 802.15.3.

Specifically, in the situation of UWB cordless communication network, transmit data on an extremely wide frequency band, thereby this network conflicts mutually with adjacent cordless communication network probably by data are expanded.

On the other hand, the pulse signal string that is used for the UWB radio communication system does not have the carrier wave of characteristic frequency, thereby is difficult to carry out the carrier sense operation.Therefore, if the UWB radio communication system is employed the PHY layer as IEEE 802.15.3, owing to there is not special carrier signal, then the carrier sense by this part of standardsization is used to access control, thereby must adopt based on time-multiplexed access control.

If consider for example such small-scale Radio Network System of PAN, then each network (or base station) is not always fixed, if thereby a new network of in identical space or network, constructing for example from another spatial movement to this same space, then must solve the competition between the dynamic assignment of network and time slot (or resource).

For example, the open No.2000-299670 of Japan Patent that transfers the applicant discloses a kind of network system, it is suitable for the information of this network state and the information content that will be sent out by at least one time slot allocation in a plurality of time slots of cutting apart being given a control time slot and send.

Above-mentioned disclosed network system is based on a kind of method, and wherein each terminal reports to control desk to disturbed time slot, and this control desk avoids these disturbed time slots to be used for this network.

But the method that each terminal reports to this control desk needs a device that is used for reporting at any time this control desk, thereby if having a plurality of adjacent networks, then has the problem that increases the report frequency.

In addition, in said method,, therefore can not learn by employed all frame structures of other network owing to learn the user mode of each time slot by detecting predetermined synchronizing signal.

Japanese patent laid-open publication gazette No.2,660,189 disclose a kind of method and apparatus that can dynamically give a plurality of sub-districts in cellular network an allocated bandwidth.But according to this application, disclosed method and apparatus must be organized a plurality of cell set that are called as " extra small district ", makes that the interference between the sub-district is minimized.Ask to carry out request according to the user in every sub-district to frequency bandwidth, that is, and from the request of a plurality of travelling carriages (MS) that belong to each base station (BS).In other words, if a plurality of network coexisted in identical space, then for how solving race problem between the base station it doesn't matter to the request of frequency bandwidth.In addition, in identical space under a structure new network or the situation of a network from another spatial movement to identical space, above-mentioned Japanese patent laid-open publication gazette not have the competition of solution between network and the problem of the dynamic assignment of time slot (perhaps resource).

Japan PCT patent application No.2001-518766 (WO99/17575) disclose a kind of method, wherein by separating data transmission resources with a plurality of networks, and the resource that each network based himself method for channel allocation separation distributes in its user.This application is based on such thought, and wherein the operator uses a plurality of frequency channels that are present in the same space mutually, operating this network, thereby realizes the dynamic assignment of frequency channels by (frequency) frequency band of using different operating person in cellular network.

But the transmission dynamic allocation of resources problem between the base station that is provided with fixed form is handled in above-mentioned application, thereby supposition is prepared minimum time slot to each network (perhaps base station) at first.In addition, each network (perhaps base station) that is provided with fixed form requires do not have resource to be assigned to the state of this network for to hold user's minimum resource allocation thereby do not exist.In other words, above-mentioned application does not propose any scheme, program and method and is used at the network same space neotectonics or that come from other space transfer, and the state that is assigned to this network with resource never obtains resource.Any scheme, program and method are not mentioned in above-mentioned application, and the network that is used for having constructed in a space is given an emerging network in same space resource allocation.

Summary of the invention

Therefore main purpose of the present invention provides a kind of good wireless communication system that allows a plurality of wireless network coexistences that comprise mutually, and the good radio communication control apparatus and method and the good computer program that are controlled at the traffic operation in each communication network in the communication environment that a plurality of wireless networks are vied each other well.

Another object of the present invention provides good wireless communication system, a kind of good radio communication control apparatus and the wireless communication control method and the computer program of a plurality of wireless network coexistences of vying each other of a kind of permission in same frequency band, it is preferably used in the communication environment that a plurality of wireless networks of vying each other are arranged in same frequency band, controls the traffic operation in each communication network.

Another object of the present invention provides a kind of good wireless communication system, a kind of radio communication control apparatus and wireless communication control method and a kind of good computer program, if wherein a plurality of personal area network are present on the channel of same frequency, then only provide control between the dispensing device of control desk, allow these personal area network to coexist according to the time division multiplexing transmit frame cycle by execution.

Another object of the present invention provides a kind of good wireless communication system, a kind of radio communication control apparatus and wireless communication control method and a kind of good computer program, it solves and to constitute new network or move on to the race problem between network under the situation in identical space from another space with network in identical space, thereby carries out the dynamic assignment of time slot (perhaps resource) well.

In carrying out the present invention and according to its first aspect, provide a kind of radio communication device at this, comprising communication control unit, be used for according to the resource allocation of the downstream signal that is included in first network and executive communication control; And resource allocation device, be used for carrying out resource allocation according to the transmission request that is included in the upward signal of second network.

In above-mentioned radio communication device, resource allocation device is preferably in the scope of resource of distributing to self device carries out resource allocation to the communicator of the control that is subjected to self device.

In carrying out the present invention and according to its second aspect, provide a kind of wireless communication control method at this, comprising following steps:, in downstream signal, receive by the determined resource allocation information of radio base station apparatus by first communication terminal according to transmission request from first communication terminal; According to the executive communication control in first communication terminal of this resource allocation information; And under the control of first communication terminal, response is being distributed to from radio base station apparatus in the scope of resource of first communication terminal from the transmission request of second communication terminal installation, carries out the resource allocation to the second communication terminal installation.

In above-mentioned wireless communication control method, the second communication terminal installation preferably responds the transmission request that obtains from other communication terminal under the control of self installing, distribute to the scope of resource that self installs from first communication terminal in, above-mentioned other communication terminal is recursively carried out resource allocation.

According to the radio communication control apparatus of first aspect present invention and the wireless communication control method of second aspect present invention, recursively has the wireless base station ability under the control of the wireless base station of each communication terminal in father's network, and in by the scope of resource that self installs that the wireless base station distributed, under the control of communication terminal, each wireless terminal is carried out resource allocation with wireless base station ability.Thereby this new structure can be constructed the network of two or more assurance non-interference.

In carrying out the present invention, and according to its third aspect, provide a kind of wireless communication control method that is used for carrying out resource allocation at this according to time division multiplexing, comprising following steps: give first radio station first resource period allocated in a transmit frame, its with constitute first network for a radio station in himself radio station at least the resource period allocated; And giving second radio station in the second resource period allocated of first resource in the cycle, it constitutes second network with at least the first radio station.

In carrying out the present invention and according to its fourth aspect, provide a kind of at this based on time-multiplexed wireless communication system, comprising: first radio station, it constitutes first network with a radio station a resource period allocated being given self radio station, to communicate with other radio station that constitutes first network; And second radio station, it together constitutes second network with at least the first radio station, communicates with other radio station with formation second network except at least a portion resource cycle that is assigned to first radio station.

Logic at this used term " system " expression multiple arrangement (perhaps being used to realize a plurality of functional modules of specific function) connects, and these devices or functional module whether to be comprised in single housing (as mentioned below) unimportant.

In carrying out the present invention and according to it aspect the 5th, provide a kind of wireless communication system at this, wherein by a plurality of radio communication devices be used for each of described a plurality of radio communication devices being carried out a plurality of wireless networks coexistences that a control desk of time slot allocation constitutes in each predetermined transmit frame cycle, each wireless network comprises: signal supervisory instrument is used for detecting the signal from other wireless network of described a plurality of wireless networks; The time slot analysis device is used for according to carried out a sending time slots that is guaranteed that time slot sends in other wireless network of described a plurality of wireless networks by the signal analysis that described signal supervisory instrument detected; And slot allocation apparatus, it is not guaranteed that carrying out in other wireless network in described a plurality of wireless networks sending time slots that time slot sends distributes to a radio communication device in self wireless network.

Above-mentioned slot allocation apparatus can be carried out in other wireless network and be guaranteed that sending time slots that time slot sends is set to not be assigned with the zone in self wireless network.Above-mentioned slot allocation apparatus can respond that this signal supervisory instrument does not detect from the such situation of the signal of other wireless network and remove the setting that is not assigned with the zone in self wireless network.

Above-mentioned time slot analysis device can be analyzed and not be assigned with the zone in other wireless network, and above-mentioned slot allocation apparatus can be carried out time slot allocation in self wireless network by using the zone that is not assigned with in other wireless network.

Each wireless network is assigned a time slot by a control desk at each transmit frame in the cycle.

In carrying out the present invention and according to it aspect the 5th, after the beacon signal that receives from other network, the beacon signal that the control desk decoding of a reception network is received, and receive the time slot allocation information in the beacon signal according to being included in, time slot is assigned with zone (perhaps time zone) in self network, is set to one and is not assigned with the zone.In addition, be assigned with zone (or time zone) by getting rid of by the employed time slot of other network, the control desk of self network can be provided with time slot once more and be assigned with zone (perhaps time zone), to be used for himself network.

As a result, by carrying out network operation comparably and avoiding each other interference, all wireless networks can co-exist on the channel of same frequency.(should be understood that used hereinafter term " same frequency band " expression UWB radio communication system, wherein data are expanded on the extremely wide frequency band that is used to send and receive.)

Carrying out the present invention and according to it aspect the 6th, provide a kind of radio communication control apparatus or method at this, be used between radio communication device, carrying out in the network environment of a plurality of wireless network coexistences that are guaranteed that time slot sends in each predetermined transmit frame cycle, in described a plurality of wireless networks, carry out the time slot allocation in transmit frame cycle, comprising carrying out following steps: detect signal from other wireless network in described a plurality of wireless networks to one in a plurality of wireless networks; According to carrying out a sending time slots that is guaranteed that time slot sends in the signal analysis that in described signal detection step, detects other wireless network in described a plurality of wireless networks; And be not guaranteed that carrying out on other wireless network in described a plurality of wireless networks a sending time slots that time slot sends distributes to the radio communication device in self wireless network.

Above-mentioned time slot allocation step can be guaranteed that one that sending time slots that time slot sends is set in self wireless network is not assigned with the zone carrying out on other wireless network.Above-mentioned time slot allocation step can response signal detects step and does not detect the setting that is not assigned with the zone of removing from the signal of other wireless network in self wireless network.

Above-mentioned time slot analysis step can be analyzed and not be assigned with the zone in other wireless network, and above-mentioned time slot allocation step can be carried out time slot allocation in self wireless network by using the zone that is not assigned with in other wireless network.

Method according to the radio communication control apparatus of sixth aspect present invention, after the beacon signal that receives from other network, the beacon signal that the control desk decoding of a reception network is received, and receive the time slot allocation information in the beacon signal according to being included in, time slot is assigned with the zone in self network, is set to one and is not assigned with the zone.In addition, be assigned with the zone by getting rid of by the employed time slot of other network, the control desk of self network can be provided with time slot once more and be assigned with the zone, to be used for himself network.

As a result, by carrying out network operation comparably and avoiding each other interference, all control desks that constitute wireless network can co-exist on the channel of same frequency.

Carrying out the present invention and according to it aspect the 7th, provide a kind of wireless communication system at this, wherein each of a plurality of radio communication devices that coexisted in each predetermined transmit frame cycle by a plurality of radio communication devices and being used for control desk carrying out time slot allocation constitutes a wireless network, at least one wireless network response receives the request that is used to constitute a new wireless network, is provided for the sending time slots of new wireless network.

In wireless communication system according to seventh aspect present invention, existing wireless network and will be by the wireless network of neotectonics between form set membership, wherein new wireless network is as subnet, and the structure of the new wireless network of existing wireless network support is as father's net.Promptly, response is by the request that is used to construct new wireless network that existing wireless network received, existing wireless network is provided for the sending time slots of new wireless network, thereby avoids the interference between the wireless network, to be implemented in the coexistence on the same frequency signal.

The result, wireless communication system according to seventh aspect present invention, if there is not the network of assigned slot from the situation of other space in-migration along with a structure new network or other network in same space, then can solve the collision problem between network, and can carry out the dynamic assignment of time slot (perhaps resource) with preferred mode.In addition, each network of having constructed can be distributed to emerging any network in same space to its resource dynamic.

Each wireless network can comprise: setting device is used for that a time slot is not assigned with the zone and be provided with gives self wireless network; Dispensing device is used to send the time slot allocation information of self wireless network; Analytical equipment is used to receive and analyze the time slot allocation information of other wireless network; And distributor, be used for a time slot that is not assigned with region allocation self wireless network at the time slot of other wireless network by using.

Above-mentioned structure request can be the request that is used for other control desk that constitutes a new wireless network is joined corresponding wireless network, perhaps the request that requires time slot from other control desk of constituting wireless network to the control desk of respective wireless network.

In addition, the information that sending time slots has been set to new wireless network can be contained in the such time slot allocation information of beacon signal for example, and notified in corresponding wireless network, the transmit frame that perhaps is used for the setting of sending time slots is notified to new wireless network can directly be sent.

In carrying out the present invention and according to aspect its 8th, provide a kind of radio communication control apparatus or method at this, be used between radio communication device, carrying out in the network environment of a plurality of wireless network coexistences that are guaranteed that time slot sends in each predetermined transmit frame cycle, carry out time slot allocation at a transmit frame in cycle in this wireless network, the request that wherein is used to construct a new wireless network is sent to any one existing wireless network.

Carrying out the present invention and according to it aspect the 9th, provide a kind of radio communication control apparatus or method at this, be used between radio communication device, carrying out in the network environment of a plurality of wireless network coexistences that are guaranteed that time slot sends in each predetermined transmit frame cycle, in this wireless network, carry out time slot allocation in the cycle at a transmit frame, wherein response is used to construct the reception of the request of a new wireless network, is provided for the sending time slots of new wireless network.

Realize the control desk of this radio communication control apparatus of eighth aspect present invention as sub-network, and realize the control desk of the radio communication control apparatus of ninth aspect present invention as father's network, thereby can avoid the interference between the network, thereby be implemented in the coexistence on the same frequency channel.

For example, if sub-network is constructed in the same space of father's network recently, perhaps sub-network has moved to the same space of father's network, then there is not time slot to be assigned to sub-network at first fully, but can avoid the conflict between the network, and can in new construction, distribute to sub-network to time slot (perhaps resource) in a preferred manner.

Above-mentioned structure request can be to be used for new wireless network is configured to the request that other control desk of corresponding wireless network adds, perhaps a request from other control desk of the new wireless network that is configured to a time slot to the control desk of respective wireless network.

In carrying out the present invention and according to it aspect the tenth, provide a kind of computer-readable program at this, be used between radio communication device, carrying out in the network environment of a plurality of wireless network coexistences that are guaranteed that time slot sends in each predetermined transmit frame cycle, carry out the time slot allocation of carrying out in a transmit frame is in the cycle in this wireless network on a computer system, comprising following steps: detection is from the signal of other wireless network; According to the signal that detects in the signal detection step, analyze and in other wireless network, carry out the sending time slots that is guaranteed that time slot sends; And not be guaranteed that a sending time slots that time slot sends distributes to a radio communication device in self wireless network carrying out on the wireless network.

In carrying out the present invention and according to its tenth one side, provide a kind of computer-readable program at this, be used between radio communication device, carrying out in the network environment of a plurality of wireless network coexistences that are guaranteed that time slot sends in each predetermined transmit frame cycle, carry out the time slot allocation of carrying out in a transmit frame is in the cycle in this wireless network on a computer system, comprising following steps: reception is used to construct the request of new wireless network; Respond this structure request, utilize a time slot that in self wireless network, is provided with not to be assigned with the zone and carry out time slot allocation; And in self wireless network the sending time slots assignment information.

In carrying out the present invention and according to it aspect the 12, provide a kind of computer-readable program at this, be used between radio communication device, carrying out in the network environment of a plurality of wireless network coexistences that are guaranteed that time slot sends in each predetermined transmit frame cycle, on a computer system, carry out in this wireless network the time slot allocation of execution in a transmit frame is in the cycle, comprising following steps: the request that is used to construct new wireless network is sent to any one existing wireless network; From any one existing wireless network receiving slot assignment information; And in self wireless network, carry out time slot allocation according to time slot allocation information.

The computer program definition computer-readable program of the present invention the tenth to 12 aspect, it realizes predetermined process on computer system.In other words, be implemented in co-operation on the computer system, to obtain and the same effect that wireless communication system was provided by fifth aspect present invention in the program that tenth aspect present invention is installed on the computer system.In that being installed on the computer system, computer program aspect the present invention the 11 and the 12 is implemented in co-operation on the computer system, to obtain the effect identical with seventh aspect present invention.By the reference specification and will find out these and other objects of the present invention easily in conjunction with the accompanying drawings.

Description of drawings

Fig. 1 is the schematic diagram that illustrates as the structure of the wireless communication system of first embodiment of the invention.

Fig. 2 is the block diagram that a kind of structure of communication terminal is shown, and it is as the wireless base station that is used for carrying out at the wireless network relevant with first embodiment of the invention and other communication terminal radio communication.

Fig. 3 is the block diagram that the structure of communication terminal is shown, and it is as the subscriber board that is used for carrying out radio communication under the control of base station.

Fig. 4 is the schematic diagram that the example structure of the tdma frame that is used for the wireless base station relevant with first embodiment of the invention is shown.

Fig. 5 illustrates two PAN (Personal Area Network) how to be separated from each other the schematic diagram that coexists.

Fig. 6 illustrates first microgrid 1 and second microgrid 2 schematic diagram how space overlap exists.

Fig. 7 is the schematic diagram that the structure of the transmit frame that is used for the microgrid relevant with second embodiment of the invention is shown.

Fig. 8 is the block diagram that is illustrated in the structure of the radio communication device 10 of working in the microgrid relevant with second embodiment of the invention.

Fig. 9 is the schematic diagram that is illustrated in an example of the order of operation between the control desk 21 of the control desk 11 of first microgrid 1 and second microgrid.

Figure 10 illustrates the schematic diagram of structure of transmit frame that is used for not being assigned with each first microgrid 1 and the setting of second microgrid 2 processing in zone.

Figure 11 illustrates the schematic diagram of transmit frame structure that is used for not being assigned with each first microgrid 1 and the setting of second microgrid 2 processing in zone.

Figure 12 illustrates the schematic diagram of structure of transmit frame that is used for not being assigned with each first microgrid 1 and the setting of second microgrid 2 processing in zone.

Figure 13 illustrates the schematic diagram of structure of transmit frame that is used for not being assigned with each first microgrid 1 and the setting of second microgrid 2 processing in zone.

Figure 14 illustrates to be used to construct the flow chart of microgrid with the processing operation of the control desk of the order of operation shown in realization Fig. 9.

Figure 15 illustrates by avoiding the phase mutual interference and form set membership to use same frequency channel to realize the schematic diagram of order of operation of the coexistence of two microgrids.

Figure 16 illustrates by avoiding the phase mutual interference and form set membership to realize flow chart with the handling procedure of the control desk of the coexistence of another microgrid.

Figure 17 illustrates by avoiding the phase mutual interference and form set membership to use same frequency channel to realize the schematic diagram of another example of order of operation of the coexistence of two microgrids.

Figure 18 is according to the handling procedure between the microgrid shown in Figure 17, realizes the flow chart of handling procedure of control desk of father's microgrid of the coexistence of microgrid by avoiding the phase mutual interference.

Figure 19 is according to the handling procedure between the microgrid shown in Figure 17, realizes the flow chart of handling procedure of control desk of sub-microgrid of the coexistence of microgrid by avoiding the phase mutual interference.

Figure 20 is the schematic diagram that an example that sends based on the data of UWB scheme is shown.

Embodiment

By embodiment the present invention is described in further detail below with reference to accompanying drawings.

A first embodiment

Referring now to Fig. 1,, in the schematic construction of the wireless communication system of realizing as first embodiment of the invention this illustrate.

As shown in fig. 1, wireless base station (hereinafter referred is BS) and three travelling carriages (hereinafter referred is MS) carry out radio communication, and this travelling carriage is as the subscriber board of this wireless base station, that is, and and MS-A (user A), MS-B (user B) and MS-C (user C).BS, MS-A, MS-B and MS-C constitute father's network.Mobile station MS-A has the function of wireless base station and carries out radio communication with two mobile station MS-D and MS-E as the subscriber board of MS-A.Mobile station MS-A and mobile station MS-D and MS-E formation sub-network as the base station.

Although not shown, other mobile station MS-B and MS-C also can have the function of base station.That is, these base stations can constitute sub-network as slave station by using other MS.Obviously, can constitute the sub-network of sub-network as slave station by using other MS by MS-D in the sub-network that MS-A constituted that is used as slave station or MS-E.

Referring to Fig. 2, the structure of communication terminal shown in it, it is as a wireless base station, is used for carrying out radio communication with other communication terminal at wireless network of the present invention.

Upward signal from MS is received by antenna 111 by wireless receiving part 112.112 pairs of upward signals that received of wireless receiving part are carried out predetermined wireless receiving and are handled (for example, down converted and A/D conversion), and the upward signal after handling is outputed to demodulation part 113.

113 demodulation handled signal in demodulation part receives data with output.This demodulation part 113 also demodulation is confirmed part 114 from a direct access communications channels that MS received (RACH) to send the request signal request of outputing to one.These request affirmation part 114 usefulness confirm that from the RACH signal of each MS sends a request, to output to scheduler 115 which MS to have sent this transmission information requested about.

The MS that 115 pairs of schedulers have sent this transmission request carries out resource allocation, and resource allocation information is outputed to beacon insertion portion 116.This beacon insertion portion 116 is inserted into the transmission data to the resource allocation information that obtains in scheduler 115, and these transmission data are outputed to a modulating part 117, sends signal as one.

Modulating part 117 demodulation should send signal, and the transmission signal of modulation is outputed to wireless transmission part 118.118 pairs of modulated signals of wireless transmission part are carried out predetermined wireless transmission and are handled (for example, D/A conversion and up-conversion), and consequential signal is sent to MS by antenna 111, as a downstream signal.

Referring to Fig. 3, in the structure of a communication terminal this illustrate, its conduct is used for carrying out the subscriber board of radio communication under the control of the base station of cordless communication network related to the present invention.

Received by antenna 121 by wireless receiving part 122 from BS or as the downstream signal of the MS of a BS.122 pairs of received signals of this wireless receiving part are carried out wireless receiving and are handled (for example, down converted and A/D conversion), and consequential signal is outputed to a demodulation part 123.

123 demodulation handled signal in demodulation part receives data with output.Demodulation part 123 is direct access communications channels (RACH) signal that receives from the MS (MS-D or MS-E) of the sub-network of the subordinate that becomes self device of demodulation also, and part 125 is confirmed in the request of outputing to of the signal of demodulation, sends request signal as one.In addition, the beacon signal that demodulation part 123 demodulation obtain from BS in downstream signal, and the beacon signal of demodulation is outputed to beacon catch part 124.

The part 124 of catching beacon reads and is included in transmission from BS or as the beacon resource allocation information in the downstream signal of the MS of BS, in the mode of identification Resources allocation.This resource allocation information is output to Control on Communication part 127.According to resource allocation information, Control on Communication part 127 control frame configuration sections 129 are to carry out time division multiplexing (TDMA) communication.Frame configuration section 129 sends data for father's network configuration, and the data of configuration are outputed to modulating part 130.And when carrying out when sending solicit operation to BS or as the MS of BS, frame configuration section 129 sends request signal to one and is inserted into the transmission data that are used for father's network.

Request affirmation part 125 is asked by confirm this transmission from the RACH signal of each MS, and outputs to a modulator 126 which MS to have sent this transmission information requested about.The MS that 126 pairs of modulators have received the request of transmission carries out resource allocation, and the information about this resource allocation is outputed to beacon insertion portion 128.Beacon insertion portion 128 is inserted into the transmission data that are used for sub-network to the beacon signal as the id signal that comprises the resource allocation information that is obtained by modulator 126, and result data is outputed to modulating part 130.

Modulating part 130 modulation are used for the transmission signal of father's network and are used for the transmission signal of sub-network, and modulation signal is outputed to wireless transmission part 131.131 pairs of these modulation signals of wireless transmission part are carried out predetermined wireless transmissions and are handled (for example, D/A conversion and up-conversion), and handled signal are sent to BS by antenna 121 or as the MS of BS, as a upward signal.

Referring to Fig. 4, be used for the structure of tdma frame of the wireless network of present embodiment shown in it.Hereinafter with reference to the wireless communications method of this figure detailed description according to present embodiment.Please note that the communication terminal shown in Fig. 3 is MS-A.

At first, shown in the top of Fig. 4, the BS shown in Fig. 1 gives user A, user B and user C resource allocation.That is, follow user A, user B and user C after this beacon in order.This resource allocation information is comprised in the beacon of father's network.

The beacon of father's network is sent to each MS from BS.In MS-A, catch part 124 by beacon and read this beacon, to discern the resource allocation of and then after this beacon, carrying out MS-A.Information about this resource allocation is sent to Control on Communication part 127.Control on Communication part 127 is carried out control, thereby carries out in the cycle that resource is assigned with and the communicating by letter of BS.

The MS-A intercepting is from the resource request (sending request) of the MS-D and the MS-E of the subordinate that becomes MS-A.These send request and send by the RACH in the conflict part of sub-network.

Then, MS-A confirms to confirm the transmission request of part 125 from MS-D and MS-E by request, and the transmission request of confirming is sent to modulator 126.The MS (being MS-D and MS-E in this example) that 126 pairs of modulators have been received the request of transmission carries out resource allocation.In this case, MS-A gives resource allocation as the MS-D of the subordinate of MS-A and the subscriber board of MS-E in the scope of the resource of being distributed to MS-A by BS.

Sent to MS-D and MS-E about information by the beacon in the downstream signal of sub-network by the determined resource allocation of MS-A.Therefore, shown in the bottom of Fig. 4, user D and user E are carried out resource allocation.That is, after beacon, in order user D and user E are carried out resource.

Thereby, owing in distributing to the scope of resource of main device, the subordinate communication terminal is carried out resource allocation, therefore, if a plurality of network is configured in identical or adjacent areas in, then can prevent and avoid the interference between them.

In communication based on above-mentioned TDAM frame, the MS of father's network (MS-A, MS-B or MS-C) is by the resource allocation (send request) of the RACH request in the conflict part at next frame, and BS responds the resource allocation that next frame is carried out in this request, and this resource allocation is notified to the MS (MS-A, MS-B or MS-C) of request in next beacon.Then, this MS (MS-A, MS-B or MS-C) basis is by the entrained resource allocation information executive communication of beacon.

The MS of sub-network (MS-D or MS-E) is by the resource allocation (send request) of the RACH request in the conflict part at next frame, and MS-A responds the resource allocation that next frame is carried out in this request, by next beacon this resource allocation is notified to MS (MS-D or MS-E).Then, MS (MS-D or MS-E) basis is by the entrained resource allocation information executive communication of this beacon.

Then, in the present embodiment, each communication terminal as the subordinate of the wireless base station in father's network recursively has the wireless base station function, and in by the scope of resource that self installs that the wireless base station distributed, constitute a sub-network, thereby the communication terminal of its subordinate is carried out resource allocation.This new structure can dispose two or more networks, guarantees their non-interference.In addition, according to the present invention, can enlarge the zone of this network and do not relate to the scale of increase equipment.

Simultaneously, for new wireless technology, it can have frequency of utilization resource effectively, and ultra broadband (UWB) delivery plan attracts much attention recently.Basically, the ultra broadband delivery plan is carried out the base band transmission by using based on the signal of pulse train, and each pulse has very short pulse duration (for example, less than 1ns (nanosecond)).Its occupied bandwidth is the magnitude of GHz, thereby the numerical value that obtains by occupied frequency band being removed its centre frequency (for example, 1GHz to 10GHz) becomes 1 approximately.Therefore, to compare with bandwidth used in the WLAN based on so-called W-CDMA scheme, cdma2000 scheme and SS (sequence spreading) and OFDM (increase frequency division multiplexing) be extremely wide to the bandwidth of this scheme.

In addition, this ultra broadband delivery plan is characterised in that the wireless system that has high semiotic function density feature for specific frequency band is not easy disturbed owing to its lower signal power density characteristic.Therefore, this scheme promises to be a kind of can being superimposed upon by the technology on the employed frequency band of existing wireless system.In addition, because its broadband character, this ultra broadband delivery plan promises to be a kind of other ultrahigh speed wireless transmission technology of 100Mbps level that is used for PAN (Personal Area Network) (PAN) very much.

On the other hand, in the UWB wireless transmission, if supposing two or more mutual inharmonic UWB wireless networks is present in the identical zone, each network passes through to use the shared frequency band of overlapping ultra broadband with the executive communication of low signal power density, thereby may cause serious interference owing to the position characteristic of sending and receiving device.When the radio communication system according to present embodiment is applied to the UWB wireless transmission, do not cause resource overlapping, avoiding interference, thereby can carry out the UWB wireless transmission and do not cause phase mutual interference between the network.

In the above-described embodiments, have 3 MS as the subordinate of this BS, and as two MS of the subordinate of MS-A.Obviously, the invention is not restricted to this structure.Communication terminal MS-D and MS-E also have unlimited base station functions, and construct grandson's net in distributing to the scope of resource that himself installs, thereby recursively give the subordinate communication terminal resource allocation.

In the above-described embodiments, constitute under the state of a subnet at communication terminal MS-A and its subordinate communication terminal, communication terminal MS-B and MS-C also have the function of unlimited base station, to construct their subnet simultaneously in the scope of resource of distributing to these communication terminals MS-B and MS-C.In this case, the scope of resource of these subnets is not overlapped, thereby does not disturb between subnet.

B. second embodiment

Referring to Fig. 5, two existences that PAN (Personal Area Network) is separated from each other shown in it.Small-scale hereinafter PAN (Personal Area Network) is also referred to as " microgrid ".

In the drawings, first microgrid 1 is made of with a plurality of radio communication devices 12,13 that constitute

first microgrid

1 and 14 or the like institute first control desk 11 that is called telegon.Second microgrid 2 is made of with a plurality of radio communication devices 22,23 that constitute second microgrid 2 or the like institute second control desk 21 that is called telegon.

The coverage of each of first microgrid 1 and second microgrid 2 is the scope (represented by dotted line) by the radio wave of control desk transmission.Therefore, first microgrid 1 and second microgrid 2 are present on the channel of same frequency, and not phase mutual interference in the space.

Referring to Fig. 6, wherein first microgrid 1 and second microgrid 2 spatially exist overlapped.

In the figure, the coverage of each of first microgrid 1 and second microgrid 2 is the scope (represented by dotted line) by the radio wave of control desk transmission.Therefore, the coverage of first microgrid 1 and second microgrid 2 is spatially overlapped as can be seen.

In the state shown in Fig. 6,, then can receive information from other microgrid if first microgrid 1 and second microgrid 2 are present on the channel of same frequency.If carrying out independently of each other simultaneously, first microgrid 1 and second microgrid 2 be guaranteed that time slot sends, and the conflicting problem of information of two microgrids then occurs.

In order to overcome this problem, the second embodiment of the present invention provides a kind of scheme, the control desk (or telegon) 11 of first microgrid 1 and

second microgrid

2 and 12 executive communications thus, thus the conflict between the control desk in these microgrids avoided, shown in four-headed arrow.For example, a microgrid is learnt the state that is guaranteed time slot of other microgrid from beacon message, and be not assigned with the zone by what other microgrid was used for that time that information sends is set to self microgrid, thereby allow two microgrids on the channel of the same frequency that is used for microgrid work, to coexist.

Referring to Fig. 7, be used for the structure of the transmit frame of the microgrid relevant shown in it with present embodiment.

In the figure, transmit frame 30 beginning that is included in this frame is broadcast to a beacon broadcast zone (B) 31 of this network, the access to content cycle (CAP) 32 that is for example exchanged about the information of the processing that will be performed and each radio communication device from control desk and carries out the no collision period (CFP) 33 that the information that is guaranteed time slot sends when arriving this network.The cycle that arrives till the next Web broadcast zone is provided as a transmit frame cycle.

The structure of transmit frame inside is written in the beacon message, and it is broadcast to this network by the beginning at this frame.

Should be understood that, according to by the IEEE802.15.3 specified standard, in no collision period 23, directly between any radio communication device, carry out the time slot allocation transmission that employing is guaranteed time slot (GTS) 34 according to the multiplexing sending method that is called as TDMA (time division multiplexing).

Referring to Fig. 8, wherein be illustrated in the schematic diagram of the structure of the radio communication device 10 of working in the microgrid relevant with present embodiment.As shown in the figure, radio communication device 10 is made of interface 61, interface buffer 62, no line buffer 63, wireless communication section 64, antenna 65, control section 67 and information storage part 68.

Interface 61 is received for example such external equipment of personal computer (PC) to radio communication device 100.Interface buffer 62 is preserved the media information 601 that receives from external equipment.No line buffer 63 is preserved the information that is used for wireless transmission 602 that receives from interface buffer 62, as the wireless transmission packet.

Control section 67 is controlled at the order of the data sending processing in the radio communication device 10 in a concentrated manner.Promptly, what respond wireless transmission notifies 603, if require to be guaranteed that time slot sends and by using conflict access cycle (CAP) that this request is sent to control desk 10-8, then control section 67 is stored a reservation request 604 in the no line buffer 63 of wireless transmission in transmit frame.That is, in this structure, the reservation request 605 that is used to send is wirelessly sent by wireless communication section 64 from antenna 65.

The signal that is received by radio communication device 10 is provided to wireless communication section 64 by antenna 65, to send to no line buffer 63 as decoded signal 611.

In addition, if receive a signal by the radio communication device 10 that control desk is provided, the signal that is received is used as control signal 612 and is provided to this control section 67.This control section 67 determines that whether these signals are the reservation request from another radio communication device that constitutes this microgrid.This wireless distribution information based on this judgement is constructed to a beacon signal, and ad infinitum sends (referring to Fig. 7) when the beginning in frame period.That is, the beacon signal 605 of this frame is wirelessly sent to this microgrid from antenna 65 by wireless communication section 64.

Receive this beacon signal from other microgrid, the beacon signal that this radio communication device 10 can analysis console 67, and the zone of the information transmission that influence other microgrid is set to one is not assigned with the zone in self microgrid.

The beacon signal 605 that comprises the standard that for example is not assigned with the zone is wirelessly sent to this microgrid from antenna 65 by wireless communication section 64.

In the wireless base station apparatus in this microgrid except control desk, when the beacon message that sends from control desk is almost received termly, the time slot allocation information that is guaranteed that this control section 67 is confirmed in the corresponding no collision period (CFP) described in the beacon message, and according to the instruction of in assignment information, stipulating wireless communication section 64 is set, thereby sends the wireless transmission packet that is stored in the no line buffer 63.

If the beacon message that sends from control desk, do not specify in the reception in the no collision period (CFP), then the wireless base station apparatus of each except control desk is provided with wireless communication section 64 according to this instruction, receives to carry out signal in the preset time relation.Received information 611 is stored in the no line buffer 63.Then, the information 614 that control section 67 receives based on the frame period according to 604 reconstruct of frame period signal, and the information of reconstruct is sent to interface buffer 62.Interface 61 is sent to the external equipment (not shown) to received information, as predetermined interface format information 615.

The above-mentioned order of control operation is carried out by the indication of control section 67.Control section 67 has the information storage part 68 that is used to store various sending control programs and control information.With reference to these block of information, these control section 67 usefulness information storage parts 68 are specified a command group 616 for momentarily.

Referring to Fig. 9, an example of the order of operation that will between the control desk 21 of first control desk 11 of first microgrid 1 and second microgrid 2, carry out shown in it.More specifically, Fig. 9 illustrates the program that is not assigned with the zone is set in first microgrid 1 and second microgrid 2 when the control desk 21 by the control desk 11 of first microgrid 1 and second microgrid 2 receives beacon messages.In the example shown, suppose that the control desk 11 of first microgrid 1 and second microgrid 2 and control desk 21 are according to the executable operations in the same manner of the handling procedure shown in Figure 14, and suppose, in each microgrid, be set to a control desk according to the predetermined specific radio communication device of processing.

At first, first control desk 11 of first microgrid 1 sends the beacon message (P1) of first microgrid 1.

The control desk 21 of second microgrid 2 receives beacon message.For example, if separate enough far between first microgrid 1 and second microgrid 2, then they can not receive beacon signal mutually.In this case, microgrid forms (referring to Fig. 5) independently of each other.

Then, the control desk 21 of second microgrid 2 sends the beacon message 21 (P2) of second microgrid 2.

If enough near between first microgrid 1 and second microgrid 2, then can receive beacon message (referring to Fig. 6) mutually at a distance of getting.When the beacon message that comes control console 21 was received, the control desk 11 of first microgrid 1 was that 2 settings of second microgrid are not assigned with the zone.

Then, the control desk 11 of first microgrid 1 sends the beacon message of first microgrid 1, comprising the setting (P3) that is not assigned with the zone.

If come the beacon message of control console 11 to be received, then the control desk 21 of second microgrid 2 is that 1 setting of first microgrid is not assigned with the zone.

Then, the control desk 21 of second microgrid 2 sends the beacon message of second microgrid 2, comprising the setting (P4) that is not assigned with the zone.

Therefore, when operating in the same manner, the control desk 11 of first microgrid 1 and second microgrid 2 and control desk 21 allow to have a plurality of microgrid coexistences by carrying out time division multiplexing on the channel of same frequency.Obviously, in the UWB radio communication system, wherein data are expanded on extremely wide frequency band, and by carrying out above-mentioned time slot allocation, a plurality of microgrids can coexist.

Then, if because the dynamic change (for example, the motion of radio communication device) in the communication environment makes the control desk 11 of microgrid 1 can not receive the beacon message of second microgrid 2 (P5), then the control desk 11 of microgrid 1 can be removed the setting that is not assigned with the zone.

Similarly, if the control desk 21 of second microgrid 2 can not receive the beacon message (P6) of first microgrid 1, then the control desk 21 of second microgrid 2 can be removed the setting that is not assigned with the zone.

Figure 10 to 13 is illustrated in the transmit frame configuration of first microgrid 1 and second microgrid 2, is not assigned with the processing in zone by each setting of carrying out of first microgrid 1 and second microgrid 2.

In state as shown in Figure 10, first microgrid 1 and second microgrid 2 are not provided with and are not assigned with the zone, but each is all operated by the GTS distribution of carrying out independently in its CFP zone.What therefore, all be not provided for other microgrid in the transmit frame of first microgrid 1 and second microgrid 2 is not assigned with the zone.

In the state shown in Figure 11, the control desk of first microgrid 1 receives the beacon message of second microgrid 2, and is that second microgrid 2 is provided with in the transmit frame of first microgrid 1 and is not assigned with the zone.

In the example shown, first microgrid 1 is carried out GTS in a concentrated manner and is distributed in self microgrid in the CFP zone, minimize by the length that makes the CAP zone, and half that this frame period is set be not for being assigned with the zone.

In state shown in Figure 12, the control desk of second microgrid 2 21 receives the beacon message of first microgrid 1, and in the transmit frame of second microgrid 2, be provided for first microgrid 1 be not assigned with the zone.

In an example shown, except with not being assigned with the part of equal value mutually of zone of first microgrid 1, the control desk 21 of second microgrid 2 is carried out GTS in a concentrated manner and is distributed in the CFP zone.In addition, control desk 21 minimizes the length in CAP zone, and is set to not be assigned with the zone by first microgrid, 1 employed zone.

In the stage shown in Figure 13, respond first microgrid 1 and second microgrid 2 does not receive mutual beacon signal, remove the setting that is not assigned with the zone in each microgrid.

In an example shown, each of first microgrid 1 and second microgrid 2 is used entire frame cycle to be used for its microgrid and is sent, thereby the GTS that carries out in the CFP zone in the mode of redundancy distributes, and the CAP zone is set to long enough, is used for enough tolerance limits.

In the example shown in Fig. 9 to 13, control desk is equally operated mutually, thereby uses two microgrids of the channel of same frequency to coexist.Obviously, the equal operation of each control desk can make three or more microgrid coexistence of the channel that adopts same frequency be achieved.

Referring to Figure 14, be described as shown in it realizing the operation sequence shown in Fig. 9 and the processing operation carried out by each control desk that constitutes microgrid.In fact, this processing operation is realized by the control section 67 in the radio communication device 10 that is set to a control desk by execution preset program code.

At step S1, determine that whether radio communication device is as this control desk.Suppose that in each microgrid, specific radio communication device becomes this control desk by following predetermined processing.But the handling procedure itself that is used for being provided with at each microgrid control desk directly is not associated with key idea of the present invention, thereby will omit the description to this handling procedure.

If radio communication device is not this control desk, then decisional block S1 be judged as "No", therefore, this handling procedure finishes.On the other hand, if find this radio communication device, determine at step S2 whether the beacon message of other microgrid of existence is received around then as control desk.

Be not received if find the beacon message of other microgrid, then decisional block S2 be judged as "No", thereby this handling procedure finishes.On the other hand, if the beacon message of other microgrid is received, then determine the frame structure of this microgrid according to the beacon message that is received at step S3.

At step S4, be identified for not being assigned with the zone and whether being set up of self microgrid.

If find that be not assigned with the zone is set up, then this is not assigned with the zone and is set to by the employed zone of self microgrid at step S9, and this handling procedure proceeds to step S10 then.

On the other hand, be not assigned with the zone, then determine at step S5 whether the GTS distribution of no collision period (CFP) repeats mutually with other microgrid of cycle existence if discovery is provided with.

Repeat mutually with other microgrid if GTS distributes, then the GTS at step S6 change self microgrid distributes.If distributing, GTS do not repeat the then processing of skips steps S6.

At step S7, determine in the beacon transmitting time, whether to exist GTS to distribute.

Be assigned to the beacon transmitting time if find GTS, then regulate the beacon transmitting time at step S8, thereby the distribution of self microgrid will be not and the distribution overlaid of other microgrid, this handling procedure will proceed to step S10 then.If GTS is not assigned to the beacon transmitting time, the then processing of skips steps S8, and this handling procedure proceeds to step S10.

At step S10, what self microgrid was set is not assigned with the zone.At step S11, the change of frame structure is used as beacon message and is broadcast to this microgrid.

Therefore, in the present embodiment, the control desk of microgrid is equally operated mutually, with the order of operation shown in the execution graph 9, thereby allows a plurality of microgrids of the channel of use same frequency to coexist, and non-interference.

In the UWB wireless transmission, if inharmonic two or more wireless micro-networks coexist as in the identical zone mutually, then each network by using an overlapping ultrabroad band with the executive communication of low signal function rate density, thereby concern and may cause serious disturbance according to the position between the receptions/dispensing device.On the contrary, if radio communication system related to the present invention is applied to the UWB wireless network, it is overlapping resource then not occur, thereby can avoid interference effectively, to allow to carry out glitch-free wireless transmission between network.

C. the 3rd embodiment

In above-mentioned second embodiment, a plurality of microgrids are equally operated, and the identical handling procedure of each microgrid control desk execution, thereby the feasible a plurality of microgrids of the channel of same frequency that use coexist and non-interference.

In the third embodiment of the present invention, use a plurality of microgrids of the channel of same frequency to realize coexistence and non-interference, and between them, form set membership.That is, father's microgrid distributes by the employed time slot of sub-microgrid, and the use of sub-microgrid carries out time slot allocation by father's microgrid institute distributed time slot or the GTS between sub-microgrid distributes.

In order to set up the set membership between two or more microgrids, be similar to other terminal radio station in father's microgrid, the control desk of each sub-microgrid identifies oneself with in this father's microgrid and carries out the time slot solicit operation as a common terminal radio station, and recursively operate this console function, the time slot allocation that obtains is given each the terminal radio station in sub-microgrid in father's microgrid.Obviously, some the terminal radio station in each sub-microgrid can be realized the recurrence console function similarly and be constructed grandson's microgrid.

And, the control desk of father's microgrid can respond from the time slot request of the control desk of each sub-microgrid and distribute microgrid (perhaps father's microgrid can be prepared and not be assigned with the zone), and and the handling procedure that is used between microgrid, cooperating irrelevant, thereby realize the coexistence of microgrid and do not have the phase mutual interference.

Thereby, according to present embodiment, if when a not network of assigned slot is appearred in microgrid or network that structure is new in identical space from this situation of another space in-migration, then can solve the problem of this network conflict, suitably to carry out the dynamic assignment of time slot (perhaps resource).In addition, existing network can be given emerging network in same space resource allocation.

As shown in this embodiment, between microgrid, form set membership with in the situation of avoiding interference each other, different with above-mentioned second embodiment, the processing operation of being carried out by radio communication device is according to the function of the control desk that is used for father's microgrid and sub-microgrid and different (these will be described below).

Referring to Figure 15, when forming set membership, be used to realize to use the channel of same frequency shown in it and an example of the order of operation of two microgrids coexistences of non-interference.In the example shown, suppose to exist microgrid A and microgrid B, then their operational network and be not pre-formed set membership independently.

At first, suppose that the control desk of microgrid B can receive the beacon of microgrid B (P11).

As a result, the control desk of microgrid B is participated in the control desk (P12) that request sends to microgrid A to one.Correspondingly, the control desk of microgrid A is participated in the control desk (P13) that permission turns back to microgrid B to one.This participation permission is for example by the distribution of the network address and return performed.As a result, between microgrid A and microgrid B, form set membership.

Then, the control desk of microgrid B sends to a time slot request (perhaps channel time request) in the control desk (P14) of microgrid A.Correspondingly, the control desk of microgrid A turns back to a time slot allocation in the control desk (P15) of microgrid B.At this moment, the control desk of microgrid A can send this time slot allocation by a direct frame or by a beacon that writes the time slot allocation result.

This time slot allocation is returned with a kind of method, and wherein the control desk of microgrid A is notified the beacon that for example writes the time slot allocation in microgrid A in microgrid A.In addition, the control desk of microgrid A can directly send to the transmit frame that writes time slot allocation information the control desk (directly frame) of microgrid B.Then, the control desk of microgrid B can be confirmed the reception (P16) of this transmit frame to the control desk of microgrid A.

Microgrid A control desk is notified this beacon (P17) in microgrid A.This beacon is represented the information of time slot allocation that microgrid B is done.Therefore, microgrid B can use institute's distributed time slot to operate microgrid B.

As a result, if microgrid B with the same space at microgrid A place in up-to-date generation, perhaps microgrid B moves in this same space, then the collision problem in microgrid A can be solved, dynamically to divide the time slot (or resource) that is used in operation microgrid B.

The control desk of microgrid B is notified the beacon (P18) of the operation that writes microgrid B in microgrid B.In addition, the communicator in microgrid B can be to the control desk request time slot allocation (P19) of microgrid B.Correspondingly, the control desk of microgrid B is before for example sending out public notice with a direct frame, to redistributing (P20) by the part of microgrid A institute distributed time slot.The communicator of microgrid B can return a confirmation of receipt (P21).

In the UWB wireless transmission, if two or more UWB wireless networks of not coordinating are present in the identical zone, pass through to use overlapping ultrabroad band executive communication at each network with low signal power density, thereby, according to the relation of the position between the reception/dispensing device, strong interference appears.If the order of operation between the microgrid shown in Figure 15 is applied to the UWB radio communication system, the overlapping situation of resource then do not occur, thereby can avoid interference effectively, thereby permission does not have the UWB wireless transmission of interference between network.

Referring to Figure 16, describe shown in it by avoiding interference and form the flow chart of handling procedure of control desk that set membership realizes the coexistence of microgrid.In the realization, this processing operation is to realize by carrying out the preset program code by the control section 67 of radio communication device 10.

At first, for example by receiving exist (the step S21) that a beacon signal detects adjacent microgrid from adjacent radio station.

If receive this beacon signal, then attempt being added in this existing adjacent microgrid as a sub-microgrid from adjacent radio station.In this case, the address information in adjacent radio station obtains (step S22) from this beacon message.

Whether then, the address information that obtained is compared with the address information in self radio station, be a new address (step S23) with the address of determining self radio station.If the address in self radio station is a new address, then this participation request is sent to the control desk (step S24) of adjacent microgrid, and determines whether be received (step S25) from the participation permission of adjacent microgrid.After receiving this participation permission, finish the operation that joins this adjacent microgrid.As a result, this sub-microgrid adjacent microgrid that can be used as father's microgrid constitutes.Thereby, can estimate the required sending time slots of self radio station microgrid.

Then, time slot request is sent to the control desk (step S26) as the adjacent microgrid of father's microgrid.If a time slot allocation then turns back to this control desk (step S28) to this confirmation of receipt from this control desk (step S27).

Then, can on institute's distributed time slot, carry out the operation (step S29) of the microgrid in self radio station.Then, when the time slot assignment request that occurs from the called station of the microgrid in self radio station, can by to distribution time slot redistribute and carry out this communication.

On the other hand,, perhaps find that at step S23 from the address in self radio station that adjacent microgrid obtains be not new address, determine then that this self radio station can be used as father's microgrid and the possibility of working if receive beacon signal from adjacent radio station at step S21.That is, determine whether be received (step S30) from the participation request in adjacent radio station.

When receiving this participation request from adjacent radio station, this adjacent radio station is participated in self radio station network, and an address is assigned to adjacent radio station, and sends one to it and participate in permission (step S31).This participation permission comprises the address of distributing to adjacent radio station.

Then, when the time slot request that receives from this adjacent radio station (step S32), whether the distribution of then determining this time slot request feasible (step S33).If time slot allocation is infeasible, then this time slot allocation is sent to this adjacent radio station (step S34).

Then, the microgrid in this self radio station in other zone except assigned slot, work (step S35).

In the example shown in Figure 16, the address information according to control desk except the order of structure microgrid forms set membership.For this address, for example use for the so unique identifying information of (reality) equipment in MAC (machine control access) address.In this case, a new model is represented in new address.Therefore, forming set membership according to address information between microgrid can be provided with the radio communication device with old address to this father's microgrid, simultaneously, and by the constructor microgrid recursively of the radio communication device with more advanced console function.The control desk of father's microgrid not necessarily detects the situation that exists of sub-microgrid in same space.

Participate in Figure 17, be used for shown in it forming another example of order of operation that set membership realizes the coexistence of two microgrids simultaneously by avoiding interference.Suppose that in father's microgrid and sub-microgrid, this network appliance has the transmit frame cycle of structure shown in Fig. 7 and operates.

The beacon signal of father's microgrid is sent to sub-microgrid (P31) by the control desk from this father's microgrid in predetermined period.

In the control desk side of sub-microgrid, when this sub-microgrid of structure, the structure request that a time slot assignment request (GTS that is not assigned with) is used as this sub-microgrid sends (P32) in the access to content cycle of father's microgrid (CAP).

If receive a time slot assignment request from this sub-microgrid, then owing to the request of sub-microgrid structure is received, the control desk of father's microgrid is that sub-microgrid setting is not assigned with the zone, and comprising that the beacon signal that is not assigned with area information sends to next father's microgrid, thereby notify this GTS that is not assigned with (P33).

Reception comprises the father's microgrid beacon signal that is not assigned with area information, the control desk of this sub-microgrid begins to operate in the sub-microgrid that is not assigned with in the zone, sends a sub-microgrid beacon signal (P34).At this moment, the zone that is used for the transmission of father's microgrid is set to not be assigned with the zone in sub-microgrid side.

In addition, receive this sub-microgrid beacon signal, the control desk of father's microgrid can use himself not being assigned with the zone and learn and form this sub-microgrid.

Therefore, the group microgrid is in the space identical with father's microgrid during up-to-date structure or group microgrid when moving on to this father's microgrid from another space, if this sub-microgrid under the state that does not have time slot to be assigned with fully, occurs, then can solve the collision problem between the network, suitably to carry out the dynamic assignment of time slot (or resource).In addition, father's microgrid can be given emerging any other network in same space resource allocation.

Then, be not assigned with the beacon signal (P35) that the zone sends father's microgrid by what use sub-microgrid.

In the UWB wireless transmission, if two or more inharmonic UWB wireless networks are present in the identical zone, each network passes through to use overlapping ultra broadband with the low signal power executive communication, thereby concerns, occurs serious disturbance according to the position between the reception/dispensing device.If the order of operation between the microgrid shown in Figure 17 is applied to the UWB radio communication system, it is overlapping resource then not occur, thereby can avoid interference effectively, thereby can carry out the UWB wireless transmission and the not interference between network.

Referring to Figure 18, according to the operational processes between the microgrid shown in Figure 17, realize the flow chart of handling procedure of control desk of father's microgrid of the coexistence of microgrid shown in it by avoiding interference between them.In fact this processing operation is that the control desk 67 of the radio communication device 10 of the control desk by being used as father's microgrid is carried out the preset program codes and realized.

At first, in step S41, determine that whether radio communication device itself is as control desk.

If radio communication device not as control desk, then is judged as "No" in step S41, this handling process finishes after this.If this radio communication device as this control desk, then determines whether to receive the request of sub-microgrid structure in step S42.

If also do not receive the request of sub-microgrid structure, then step S42 is judged as "No", and this handling process finishes after this.If received the request of sub-microgrid structure, then in the information of step S43 acquisition about the required sending time slots of microgrid (time).

At step S44, determine in father's microgrid whether corresponding sending time slots is set to not be assigned with the zone feasible.

Be not assigned with the zone if this can not be set, then be judged as "No", after this this handling process structure at step S44.Be not assigned with the zone if can be provided with, then judge whether and to change existing time slot allocation at step S45.

Change if desired is then in the time slot allocation of step S46 change in father's microgrid.If do not need change, the then processing of skips steps S46.

In step S47, in father's microgrid, be provided with and be not assigned with the zone.At step S48, after this handling process finished, this setting was used as the beacon message of father's microgrid and sends.

Referring to Figure 19, according to the operational processes between the microgrid shown in Figure 17, realize the flow chart of handling procedure of control desk of sub-microgrid of the coexistence of microgrid shown in it by avoiding interference between them.In fact this processing operation is that the control desk 67 of the radio communication device 10 of the control desk by being used as sub-microgrid is carried out the preset program codes and realized.

At first, in step S51,, determine whether radio communication device has received the instruction that is used to be operating as control desk for example according to user instruction.

If radio communication device does not also receive this instruction, then in step S51, be judged as "No", this handling process finishes after this.If this radio communication device has received this instruction, determine in step S52 then whether the beacon signal of father's microgrid is received.

If this radio communication device does not have to receive the beacon signal from father's microgrid, this decisional block S52 is a "No", and at the control desk of this radio communication device of step S53 as common microgrid, to send a beacon signal, this handling process finishes after this.

If this radio communication device has received the beacon signal from father's microgrid, then at the required sending time slots (or time) of step S54 estimator microgrid.At step S55, in father's microgrid, in conflict access cycle (CAP), send this sub-microgrid structure request.

Whether at step S56, the beacon of father's microgrid is received, be performed to determine the setting that is not assigned with the zone.

Also be not performed if be not assigned with the setting in zone, then decisional block S56 is a "No", and this handling procedure turns back to step S54, the required sending time slots of estimator microgrid once more wherein, and the request of bundle microgrid structure sends to father's microgrid.

On the other hand, if confirmed the setting that is not assigned with the zone in father's microgrid, in step S57, carry out the setting that is not assigned with the zone in sub-microgrid then.

At step S58, after this handling process finished, the setting that is not assigned with the zone was used as the beacon message of sub-microgrid and sends.

Replenish:

Although used specific term to describe the preferred embodiments of the present invention hereinbefore, this description only is used for illustrative purposes, and should know and can make various changes and variation and do not break away from the spirit or scope of the present invention.

Industrial applicability

As indicated abovely the invention describes a kind of good a plurality of conflicting wireless networks of permission and coexist as wireless communication system on the identical frequency band, be used on same frequency band each network of a plurality of conflicting wireless networks and suitably control the radio communication control apparatus and the wireless communication control method of traffic operation and the computer program of supporting these functions.

As indicated above, the invention provides a kind of good wireless communication system, good radio communication control apparatus and wireless communication control method and computer program, it is only by carrying out control by a transmit frame cycle time division multiplexing is allowed to coexist on the channel of a plurality of PAN (Personal Area Network) at same frequency providing between the dispensing device of control desk.

As indicated above, the invention provides a kind of good wireless communication system, good radio communication control apparatus and wireless communication control method and computer program, wherein when new network of structure in identical space or network during from another space in-migration, can solve the collision problem between the network, thereby suitably carry out the dynamic assignment of time slot (or resource).

As indicated above and according to the present invention, beacon signal sends between the control desk that is present on the same channel, understanding the frame structure of objective network, thereby change this time slot allocation, to avoid the conflict mutually that is guaranteed time slot and the state that is guaranteed time slot of self network.

As indicated above and according to the present invention, according to being guaranteed time slot state, one that can be set to this self network by the zone that objective network is used to send is not assigned with the zone, thereby realizes avoiding and the afoul transmission of the information of objective network.

As indicated above and according to the present invention, if one is not assigned with the zone and is set on the objective network, this is not assigned with the zone can be set to the zone that is used to send by self network, thereby makes a plurality of network coexisted on identical channel.

If the control desk of self network can not receive the beacon signal from objective network, then can remove the above-mentioned setting that is not assigned with the zone, thereby realize using effectively the method for same channel by self network.

In addition, a control desk can send to other control desk to a net structure request, thereby carries out the time slot allocation between the network.Comprise to the structure request of other control desk and to be used to add joining request and being used to ask other control desk to carry out the time slot request of time slot allocation of this network.

As indicated above and according to the present invention, under the control of the wireless base station in father's network, this communication terminal recursively has the function of wireless base station, and in the scope of resource of himself device to other wireless terminal Resources allocation under the control in this wireless base station, thereby can dispose the network of two or more assurance non-interference.

Claims

1. wireless communication system, wherein by a plurality of radio communication devices be used in each predetermined transmit frame cycle each of described a plurality of radio communication devices being carried out a plurality of wireless networks coexistences that a control desk of time slot allocation constitutes, each wireless network comprises:

Signal supervisory instrument is used for detecting the signal from other wireless network of described a plurality of wireless networks;

The time slot analysis device is used for according to carried out a sending time slots that is guaranteed that time slot sends in other wireless network of described a plurality of wireless networks by the signal analysis that described signal supervisory instrument detected; And

Slot allocation apparatus, it is not guaranteed that carrying out in other wireless network in described a plurality of wireless networks sending time slots that time slot sends distributes to a radio communication device in self wireless network,

Carry out in wherein said slot allocation apparatus other wireless network in described a plurality of wireless networks and be guaranteed that sending time slots that time slot sends is set to not be assigned with the zone in self wireless network.

2. wireless communication system according to claim 1, wherein said slot allocation apparatus respond that described signal supervisory instrument does not detect from the situation of the signal of other wireless network in described a plurality of wireless networks and remove the setting that is not assigned with the zone in self wireless networks.

3. wireless communication system according to claim 1, be not assigned with the zone in wherein said time slot analysis device analysis other wireless network in described a plurality of wireless networks, and described slot allocation apparatus is carried out time slot allocation in self wireless network by using the zone that is not assigned with in described other wireless network.

4. radio communication control apparatus, be used between radio communication device, carrying out in the network environment of a plurality of wireless network coexistences that are guaranteed that time slot sends in each predetermined transmit frame cycle, in described a plurality of wireless networks, carry out the time slot allocation in transmit frame cycle, wherein radio communication control apparatus is controlled in described a plurality of wireless network one, and described radio communication control apparatus control comprises:

5. radio communication control apparatus according to claim 4, wherein said slot allocation apparatus respond that described signal supervisory instrument does not detect from the situation of the signal of other wireless network in described a plurality of wireless networks and remove the setting that is not assigned with the zone in self wireless networks.

6. radio communication control apparatus according to claim 4, be not assigned with the zone in wherein said time slot analysis device analysis other wireless network in described a plurality of wireless networks, and described slot allocation apparatus is carried out time slot allocation in self wireless network by using the zone that is not assigned with in described other wireless network.

7. wireless communication control method, be used between radio communication device, carrying out in the network environment of a plurality of wireless network coexistences that are guaranteed that time slot sends in each predetermined transmit frame cycle, carry out the time slot allocation in transmit frame cycle in described a plurality of wireless networks, described method comprises carries out following steps to one in a plurality of wireless networks:

Detection is from the signal of other wireless network in described a plurality of wireless networks;

According to carrying out a sending time slots that is guaranteed that time slot sends in the signal analysis that in described signal detection step, detects other wireless network in described a plurality of wireless networks; And

Be not guaranteed that carrying out on other wireless network in described a plurality of wireless networks a sending time slots that time slot sends distributes to the radio communication device in self wireless network,

Carry out on wherein said time slot allocation step other wireless network in described a plurality of wireless networks and be guaranteed that one that sending time slots that time slot sends is set in self wireless network is not assigned with the zone.

8. wireless communication control method according to claim 7, wherein said time slot allocation step respond described signal detection step and do not detect the setting that is not assigned with the zone of removing from the signal of other wireless network in described a plurality of wireless networks in self wireless network.

9. wireless communication control method according to claim 7, be not assigned with the zone in wherein said time slot analysis step analysis other wireless network in described a plurality of wireless networks, and described time slot allocation step is carried out time slot allocation in self wireless network by using the zone that is not assigned with in described other wireless network.