CN100499916C - Radio communication method and radio communication device - Google Patents
Radio communication method and radio communication device Download PDFInfo
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- CN100499916C CN100499916C CNB2005800014179A CN200580001417A CN100499916C CN 100499916 C CN100499916 C CN 100499916C CN B2005800014179 A CNB2005800014179 A CN B2005800014179A CN 200580001417 A CN200580001417 A CN 200580001417A CN 100499916 C CN100499916 C CN 100499916C
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W84/00—Network topologies
- H04W84/18—Self-organising networks, e.g. ad-hoc networks or sensor networks
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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Abstract
A first receiving unit (1515) always receives a control frame in a narrowband channel. A communication data selection unit (202) controls power saving of a second receiving unit performing reception in a UWB channel, based on the control frame. A communication data generation unit (1520) generates communication time reservation response information by adding information reporting a normal reception to the received request for communication time reservation, and transmits this information from transmitting units (1501) to (1506) in the narrowband channel, so that a second receiving unit (1514) is set to an operating mode only during a time slot when UWB communication is performed, and use of the time slot for performing UWB communication is reported to the radio communication device which has made the communication request and the radio communication devices in the area where transmission is possible. Thus, it is possible to further reduce power consumption during a reception waiting mode of the radio communication device and eliminate communication collision with other radio communication devices.
Description
Technical field
The present invention relates to a kind of the AdHoc wireless communications method and radio communication device in when communication of in cordless communication network, carrying out.
Background technology
At present, as carrying out the AdHoc wireless communications method and the radio communication device in when communication, for example exist the spy to open method and the device of putting down in writing in 2003-No. 229869 communiques.Figure 22 represents that the spy opens the wireless communications method of putting down in writing in 2003-No. 229869 communiques.
In Figure 22, radio communication device is set the announcement period of management information at interval with official hour, sends the information time of reception, receive window information and the receiving cycle management of information information of the message pick-up starting position of having put down in writing expression oneself.Receive other radio communication devices of management information, store the time of reception and receive window, receiving cycle explicitly with the communicator number of corresponding radio communication device.When the information of transmission, the reception starting position according to the time of reception and receive window, the receiving cycle of communication object are obtained the corresponding communication device sends information constantly at this.
In addition, as other existing example, have the spy and open the radio communication device of putting down in writing in 2004-No. 128616 communiques.Figure 21 is the block diagram that the expression spy opens the structure of the radio communication device of putting down in writing in 2004-No. 128616 communiques.
In Figure 21, pulse wireless machine 2004 and the antenna 2003 of existing radio communication device except being used for pulse communication, also be provided with the wireless machine 2002 in arrowband and the antenna 2001 that use the AdHoc network system, the transmitting-receiving of the control data that uses that the wireless machine 2002 in this arrowband is asked etc. between wireless communication terminal.Thus, existing radio communication device upgrades the schedule information that is used for data communication, uses the data communication of pulse communication mode according to this schedule information.
But, in the existing method of in the spy opens 2003-No. 229869 communiques, putting down in writing, though radio communication device can be only at the time waiting receiving data frames of receive window, realized low consumpting power, but there is following problem: owing to specify the receive window that receives the request of transmission, so the transmission request from a plurality of radio communication devices is concentrated at this receive window, the possibility that can't correctly receive the request of transmission improves.
In addition, also has following problem: reply the receive window that has departed from oneself because send to the own communication request or the communication of device in addition, so can't receive them.Therefore, the radio communication device that can't learn other receive data expansion time period of receive window, so the possibility that sends data in this time period improves.
In addition, in the existing radio communication device of in the spy opens 2004-No. 128616 communiques, putting down in writing, the arrowband is wireless machine according to around whether exist radio communication device to become holding state, but the pulse wireless machine is often worked.Therefore, existing radio communication device is difficult to reduce consumed power.
Summary of the invention
The object of the present invention is to provide when further reducing radio communication device and receiving consumed power under the wait state, can avoid wireless communications method, dispensing device, receiving system and radio communication device with the communication contention aware of other radio communication devices.
Wireless communications method of the present invention, the channel that carries out data communication as first radio communication device and second radio communication device, except the initial stage is first channel of dormant state, has the second channel that often to communicate by letter with the consumed power that is lower than first channel, described first radio communication device and described second radio communication device can be the super broad band radio communication devices, and described wireless communications method has following steps: first radio communication device sends control information to second radio communication device by second channel; Second radio communication device receives this control information by second channel, makes by the Data Receiving of first channel in running order; By after the first channel transceiver data, make reception turn back to dormant state at first radio communication device and second radio communication device by first channel.
Thus, second radio communication device can be realized low consumpting power by using the lower second channel of consumed power in the stand-by period of data.
In addition, first radio communication device of wireless communications method of the present invention and second communication device are the super broad band radio communication devices, and first channel is the broadband transfer path, and second channel is the arrowband transfer path of modulation speed smaller or equal to the value of predesignating.
Thus, because the modulating speed of second channel is slower than first channel, so the consumed power that first radio communication device to the, three radio communication devices can make consumed power when communicating by second channel be lower than when communicating by first channel.
In addition, in the control information of wireless communications method of the present invention, also comprise the call duration time reserve requests information of having put down in writing the time period of carrying out the data transmission, described wireless communications method also has following step: the call duration time reserve requests information that comprises in the control information that second radio communication device receives is when sending to oneself, send call duration time reservation response message by second channel, this call duration time reservation response message is to have added the information that has received the communication reservation that sends to oneself of notifying in this call duration time reserve requests information; But be arranged in first radio communication device and second radio communication device the 3rd radio communication device of the communication range of any one device at least, receive from the call duration time reserve requests information of first radio communication device with from least one side in the call duration time reservation response message of second radio communication device by second channel, and the time period of putting down in writing in call duration time reserve requests information or the call duration time reservation response message was stored as the time period of forbidding sending; The 3rd radio communication device determines the received and dispatched time period of oneself according to the time period that sends of forbidding of being stored, and first radio communication device specified time period in call duration time reserve requests information uses first channel to send data.
Thus, the radio communication device that receives the call duration time subscription information sends replying of the call duration time information that comprises reservation towards periphery, so but the radio communication device in the communication zone of the radio communication device that is requested to communicate by letter can be learnt the time period of this reservation of being communicated by letter.
In addition, wireless communications method of the present invention also has second radio communication device and uses second channel to send the step of call duration time reserve requests information to the first radio communication device request, first radio communication device sends control information by second channel according to the request from second radio communication device.
Thus, second radio communication device can be prenoticed to other radio communication device can use this situation of second channel, so can receive by the second channel that can receive on low consumpting power ground.
In addition, still to be first radio communication device carry out communication means to the multicast of second radio communication device by second channel to communication means of the present invention.
Thus, first radio communication device can be to whole radio communication device low consumpting power ground notifying communication time reservation information.
Receiving system of the present invention has: first acceptance division that receives preamble (preamble) by the narrow band channel that can often receive; Channel by ultra broadband receives data, and second acceptance division with power saving function; When receiving the preamble that receives by first acceptance division, the energy-conservation communication data of controlling second acceptance division sorts portion, it is power save mode that the communication data portion of sorting makes second acceptance division, when what received by first acceptance division is when sending to the preamble of oneself, remove the power save mode of second acceptance division, carry out the Data Receiving of the channel of ultra broadband.
Thus, the time chien shih of receiving system of the present invention beyond carrying out data communication uses second acceptance division of ultra-wideband channel to be power save mode, and the time beyond this continues to wait for the reception of preamble by the narrow band channel that can communicate by letter with the consumed power that is lower than ultra-wideband channel.Thus, can reduce the consumed power altogether of the receiving system that carries out ultra-wideband communications.In addition, receiving system of the present invention and communication mode are irrelevant, go for any agreement.
Receiving system of the present invention has: first acceptance division that comes receiving control information by the narrow band channel that can often receive; Channel by ultra broadband receives data, and second acceptance division with power saving function; Differentiate according to the control information that receives by first acceptance division and whether to send to communication data own and that control the power saving function of second acceptance division and sort portion, after the channel of described ultra broadband has received data, it is the power save mode state that the communication data portion of sorting makes second acceptance division, when receiving the control information that sends to oneself by first acceptance division, remove the power save mode of second acceptance division, carry out the Data Receiving of ultra-wideband channel.
Thus, the time chien shih of receiving system beyond carrying out data communication uses second acceptance division of ultra-wideband channel to be power save mode, continues to wait for the reception of control information by the narrow band channel that can communicate by letter with the consumed power that is lower than ultra-wideband channel.Thus, can reduce the consumed power altogether of the receiving system that carries out ultra-wideband communications.
Dispensing device of the present invention has: the control information pulse generating unit that control information is exported as the pulse of pulse duration broad; To send data as the data pulse generating unit of exporting than the narrow pulse of pulse duration of control information pulse generating unit output; The oscillating portion of output and the corresponding oscillator signal of pulse duration of the pulse of being imported by described control information pulse generating unit and data pulse generating unit; The sending part that signal from the output of described oscillating portion is sent, described oscillating portion is according to exporting the signal of narrow band channel or according to the signal of exporting ultra-wideband channel from the pulse input of described data pulse generating unit, switch output bandwidth thus from the pulse input of described control information pulse generating unit.
Thus, dispensing device of the present invention can switch output bandwidth by simple structure.
Radio communication device of the present invention has: receiving system, and it has first acceptance division that comes receiving control information by the narrow band channel that can often receive; Channel by ultra broadband receives data, and second acceptance division with power saving function; Differentiate according to the control information that receives by first acceptance division and whether to send to communication data own and that control the power save mode of second acceptance division and sort portion, after the channel of described ultra broadband has received data, it is power save mode that the communication data portion of sorting makes second acceptance division, when receiving the control information that sends to oneself by first acceptance division, remove the power save mode of second acceptance division, carry out Data Receiving by ultra-wideband channel; Dispensing device, it has the control information pulse generating unit that control information is exported as the pulse of pulse duration broad; To send data as the data pulse generating unit of exporting than the narrow pulse of pulse duration of control information pulse generating unit output; The oscillating portion of output and the corresponding oscillator signal of pulse duration of the pulse of being imported by control information pulse generating unit and data pulse generating unit; The sending part that signal from oscillating portion output is sent, oscillating portion is according to exporting the signal of narrow band channel or according to the signal of exporting ultra-wideband channel from the pulse input of data pulse generating unit, switch output bandwidth thus from the pulse input of control information pulse generating unit.
In addition, the control information that radio communication device of the present invention generated comprises call duration time reserve requests information, this call duration time reserve requests information has been put down in writing the time period of the data transmission that sends the source radio communication device, and receiving system also has: extract the identifier of transmission source radio communication device and the communication information analysis portion of the subscription time section that data send from call duration time reserve requests information; When the transmission destination of control data is communication information analysis portion oneself, the reservation table of communicating by letter that identifier and subscription time section are write down accordingly; Generate the response message generating unit of call duration time reservation response message, this call duration time reservation response message is the response message that has added the normal information that receives of notice in call duration time reserve requests information, the control information pulse generating unit of dispensing device generates pulse according to the call duration time reservation response message that the response message generating unit generates, and oscillating portion is to should pulse generating the signal of narrow band channel.
Thus, the radio communication device that receives the call duration time subscription information sends replying of the call duration time information that comprises reservation towards periphery, so but the radio communication device in the communication zone of the radio communication device that is requested to communicate by letter can be learnt the time period of this reservation of being communicated by letter.
In addition, in radio communication device of the present invention, the communication data portion of sorting only can receive ultra-wideband channel in the subscription time section that the data that send to oneself send.Therefore, can be with using the time period of ultra-wideband channel to be defined as irreducible minimum, so can further reduce consumed power.
In addition, in radio communication device of the present invention, narrow band channel is the channel of modulation speed smaller or equal to the value of predesignating.
Thus, the consumed power by narrow band channel can be suppressed to smaller or equal to setting.
According to the present invention, dispensing device can switch the bandwidth of output signal by simple structure as mentioned above, and receiving system can be monitored (carrier sense) signal by reception carrier under the state of low consumpting power.And a plurality of radio communication devices can carry out radio communication without interfering with each other.
Description of drawings
Fig. 1 represents the structure of the cordless communication network of first embodiment of the invention.
Fig. 2 represents the structure of the radio communication device of first embodiment of the invention.
Fig. 3 represents the RTS frame format of first embodiment of the invention.
Fig. 4 represents the CTS frame format of first embodiment of the invention.
Fig. 5 represents maintenance Active Frame (the keep alive frame) form of first embodiment of the invention.
Fig. 6 represents the data frame format of first embodiment of the invention.
Fig. 7 represents the communication sequence between the radio communication device of first embodiment of the invention.
Fig. 8 represents the communication forbidden list of first embodiment of the invention.
Fig. 9 represents the communication reservation table of first embodiment of the invention.
Figure 10 is the flow chart that the radio communication device of expression first embodiment of the invention sends the action of RTS frame.
Figure 11 is the flow chart of the reception action carried out of the radio communication device of expression first embodiment of the invention.
Figure 12 is the flow chart that the CTS frame that carries out of radio communication device of expression first embodiment of the invention is handled.
Figure 13 is the flow chart that the RTS frame that carries out of radio communication device of expression first embodiment of the invention is handled.
Figure 14 represents the structure of the radio communication device of second embodiment of the invention.
Figure 15 represents the structure of the radio communication device of four embodiment of the invention.
Figure 16 represents the structure of the radio communication device of four embodiment of the invention.
Figure 17 is the flow chart that transmission that the radio communication device of transmitter side of expression third embodiment of the invention carries out is handled.
Figure 18 is the flow chart that reception that the radio communication device of receiver side of expression third embodiment of the invention carries out is handled.
Figure 19 represents the maintenance Active Frame form of second embodiment of the invention.
Figure 20 A represents the structure of the dispensing device of third embodiment of the invention.
Figure 20 B represents the structure of the dispensing device of third embodiment of the invention.
Figure 21 is the block diagram of the structure of the radio communication device in the expression conventional example.
Figure 22 represents the wireless communications method of conventional example.
Embodiment
Below, use accompanying drawing that embodiment of the present invention is described.
(first execution mode)
Fig. 1 represents the structure of the cordless communication network of embodiment of the present invention.
In Fig. 1, but radio communication device 101 to 104 respectively with communication zone 111 to 114 in carry out ultra broadband (hereinafter to be referred as " the UWB ") radio communication of multiple access mode with other radio communication devices, but by nondirectional antenna to whole communication zone by the UWB channel transmission data.In addition, radio communication device 101 to 104 can freely carry out spatial movement.
Fig. 2 is the block diagram of the structure of expression radio communication device 101 to 104.
In Fig. 2, the analog signal conversion that acceptance division 201 will be received by antenna 200 is a digital signal, and delta frame, but is in accepting state often.In addition, sending part 211 is converted to analog signal with digital signal frame, sends from antenna 200.Antenna 200 is nondirectional antennas, but to communication zone emission electric wave.
Communication data sorts the kind that the frame that acceptance divisions 201 receive from antenna 200 is differentiated by portion 202.As the kind of the frame that receives, there are communication request RTS frame (hereinafter referred to as " RTS frame "), communication acknowledgement signal CTS (hereinafter referred to as " CTS frame "), communication non-confirmation signal nCTS (hereinafter referred to as " nCTS frame "), Frame and keep activating (Keep Alive) frame etc.
Here, each frame is described.
Fig. 3 represents the RTS frame format.
In Fig. 3, frame control (frame control) the 301st, the identifying information of frame has been set the intrinsic coding of RTS frame.Holding times 302 expression is accepted the permission time of reception as the CTS frame of the answer signal of RTS frame.The ID303 of dispatching station is used for determining the radio communication device in transmission source, and is set with MAC Address.The ID304 of receiving station is used for determining to send the destination, and is set with the MAC Address of the radio communication device that sends the destination.Import the number of the data transmitting time section of several 305 expression reservations, frame ID306 is used for determining the RTS frame.
Send the time started 307 and send the holding time 308 represented from CTS time of reception to the time that begins to send Frame, with the time of occupying by communicating by letter.Conflict position (CO) 309 expression conflicts are used but can't help the RTS frame.Channel number (CH) 301 specifies in the employed channel of communication of Frame.
Fig. 4 represents the frame format of CTS frame and nCTS frame.
The reception time started 401 of the CTS frame of Fig. 4 and receive holding times 402 expression RTS frame notice up to the time and the time of communicating by letter and occupying that begin to send Frame by this.On the other hand, under the situation of nCTS frame, expression from the specified reception of the radio communication device that allows receiver side, the CTS delivery time is up to the time of beginning receiving data frames and the time that this reception can occupy.
In addition, the conflict position (CO) 309 of CTS frame is illustrated in from the time period of the reservation of communicating by letter of incommunicado time period that other radio communication device is obtained and the appointment of RTS frame and has the time period that repeats, but does not use the conflict position under the situation of nCTS frame.
Frame ID306 determines the RTS frame of the response object that receives.In addition, in frame control 301, the CTS frame uses different identification codes respectively with the nCTS frame.
Fig. 5 represents to keep the form of Active Frame.
In Fig. 5, in frame control 301, set the coding that is used to discern the maintenance Active Frame.The ID501 of dispatching station is an identifier of determining the radio communication device in transmission source, is set with MAC Address.Delivery time 502 expressions keep the transmitting time of Active Frame, send at interval the cycle that 503 expressions constantly send.And PS504 represents that radio communication device is in power save mode.
Fig. 6 represents the form of Frame.
In Fig. 6, the radio communication device in the transmission source of the ID303 of dispatching station specified data.The station ID601 that posts a letter determines data are carried out the radio communication device of relaying.The radio communication device on the relay purposes ground of the ID304 of receiving station specified data, the radio communication device of the final transmission destination of transmission station, destination ID602 specified data.Here, in ID304 of receiving station and transmission station, destination ID602, be set with radio communication device MAC Address separately.
Communication data sorts portion 202 sorts mentioned kind according to frame control 301 Frame.
Communication information analysis portion 204 sorts portion 202 when having sorted the RTS frame at communication data, extracts the ID303 of dispatching station from the RTS frame, send the time started 307 and sends the holding time 308, and be registered in the communication forbidden list 205.In addition, sort portion 202 when having sorted the CTS frame at communication data, not that communication information analysis portion 204 is extracted the ID303 of dispatching station, receives the time started 401 and received the holding time 402, and is registered in the communication forbidden list 205 under the situation of MAC Address of oneself at the ID of dispatching station of CTS frame.Fig. 8 represent to communicate by letter form of forbidden list 205.
In Fig. 8, sending the source ID801 record ID303 of dispatching station, write down the moment that receives the RTS frame zero hour 803 and added the moment that sends the time started using, used and add the moment that sends the holding time 308 zero hour 803 sending holding times 804 record.Perhaps add the moment that receives the time started, use at transmission holding times 804 record to add the moment that receives the holding time zero hour 803 in the moment of using the recorder zero hours 803 to the CTS frame.At frame ID805 record frame ID306, at receive channel ID806 record CH310.
In addition, communication information analysis portion 204 is under the situation of MAC Address of oneself at the ID of dispatching station of CTS frame, sets the sign that can communicate in registered communication subscription time section in communication reservation table 206.Communication reservation table 206 is the subscription informations of being stored when oneself sending with other radio communication device of communicating by letter, and Fig. 9 represents the form of this communication subscription information.
In Fig. 9, receive destination ID902 and write down the MAC Address of communication object destination, write down to the zero hour 903 using time that the communication of preengaging begins, the transmission holding time 904 is being write down the holding time of the communication of reservation, in frame ID905, write down frame ID306, write down expression in 906 unresponsive sign arranged replying.
Communication/response message generating unit 207 receives the notice that expression receives the RTS frame that sends to oneself from communication information analysis portion 204, and generates the CTS frame that the RTS frame is replied.At this moment, communication/response message generating unit 207 check in communication forbidden list 205, whether exist comprise all or part of time period of having carried out the communication reservation, from the registration of other radio communication devices.In addition, the function of communication/response message generating unit 207 generation CTS frames is equivalent to response message generating unit of the present invention.
In addition, the communication reserve requests that communication/response message generating unit 207 receives from communication data generating unit 210 as described below, and generate the RTS frame that is used for communicating reservation to other radio communication device.In addition, communication/response message generating unit 207 is set up to the time that begins to send data in event timer 209.
The communication request that communication data generating unit 210 receives from application program (application) portion 203 sends Frame according to generations such as the content-datas of giving from APD 203.In addition, carry out indication that the time period that sends data is preengage to communication/response message generating unit 207.
The communication operation that the radio communication device 101 to 104 that as above constitutes is carried out describes.
In initial condition, communication/response message generating unit 207 often in accordance with regulations cycle generate to keep Active Frame, but send from other the radio communication device of sending part 211 in communication zone.
In addition simultaneously, communication data sorts portion 202 and is receiving when keeping Active Frame from other radio communication device by acceptance division 201, but identification is in radio communication device in the communication zone according to the ID of dispatching station.
So, radio communication device 101 to 104 existence of notice oneself mutually.That is, under the situation of the position of the radio communication device 101 to 104 in the cordless communication network of Fig. 1 relation, radio communication device 101 detects the existence of radio communication device 102, and radio communication device 102 detects the existence of radio communication device 101,103,104.In addition, radio communication device 103 detects radio communication device 102,104, and radio communication device 104 detects radio communication device 102,103.
Then, but the action of the communication reservation that radio communication device is carried out for the radio communication device of the transmission destination in communication zone sends data describe.
Figure 10 is the flow chart of the action of the expression RTS frame that sends the reservation that is used to communicate by letter.
At first, communication data generating unit 210 is when the transmission request that receives from APD 203 to the data content of other radio communication devices (step S1001), to the 207 indication communication reservations of communication/response message generating unit.
Then, communication/response message generating unit 207 is obtained the not incommunicado time period with reference to communication forbidden list 205.Then, the time period that can communicate by letter is registered in the communication reservation table (step S1002).In addition, communication forbidden list 205 does not have the recording prohibition time period under initial condition, and receives when not being to send to own communication reservation at radio communication device, and communication information analysis portion 204 is registered to have recorded and forbidden the call duration time section.
Then, communication/response message generating unit 207 to be set to transmission time started 307, the transmission holding times 308 of RTS frame respectively and is sent time starteds and transmission holding times in order to preengage the time period that can communicate by letter.In addition, set the MAC Address of oneself respectively to the ID303 of dispatching station, set the MAC Address that sends the destination, generate RTS frame (step S1003) to the ID304 of receiving station.Then, communication/response message generating unit 207 is sent the RTS frame to sending part 211, and sends (step S1004) by antenna 200.
It more than is the action that sends reservation from the data of radio communication device.
Then, use Figure 11 to Figure 13 that reception action and the data transmission action that radio communication device carries out described.
At first, the signal that receives from antenna 200 is converted to digital frame (step S1101) by acceptance division 201.Communication data sorts the classification (step S1102) that portion 202 sorts the digital frame of being changed by acceptance division 201.
Then, according to the classification of frame, carry out the CTS frame and handle (step S1103), RTS frame and handle (step S1104) and other processing and (receive the processing of situations such as keeping Active Frame or Frame: step S1105).
Below each frame handled be described in detail.
Figure 12 is that expression CTS frame is handled the flow chart of (step S1103).
At first, communication information analysis portion 204 judge the CTS frame that receives the ID of dispatching station MAC Address whether with oneself consistent (step S1201).In MAC Address is not to send under the situation of oneself, to communication forbidden list 205 will according to send the time started 307 and send use zero hour 803 that the holding time 308 obtains and transmission holding time 804 and the ID303 of dispatching station mutually (transmission source ID801) mutual correlation register (step S1202).
On the other hand, be to send under the situation of oneself in MAC Address, be provided with to communication reservation table 206 and represent to reply to have the sign (step S1203) of replying in 906.
Then, communication/response message generating unit 207 from communication reservation table 206 will be corresponding with the ID304 of receiving station, registeredly be arranged on the event timer 209 in the use zero hour 903 that receives destination ID902, start (step S1204).
Then, event timer 209 arrived constantly in the event timer time, notified (step S1205) to communication data generating unit 210.Receive this notice, the content-data that communication data generating unit 210 should send from APD 203 acquisitions etc., and generate Frame (step S1206).Then, communication data generating unit 210 is sent the Frame of generation to sending part 211, and sends (step S1207) by antenna 200.
Then, handle (step S1104) for the RTS frame, its flow process of expression in Figure 13, and describe.
At first, communication information analysis portion 204 judge the RTS frames the ID303 of dispatching station MAC Address whether with oneself consistent (step S1301).In MAC Address is not to send under the situation of oneself, makes by sending the time started 307 and sending the use zero hour 803 that the holding time 308 obtains and the transmission holding time 804 carries out related with the ID303 of dispatching station and register (step S1302) to the forbidden list 205 of communicating by letter (transmission source ID801).
On the other hand, be to send under the situation of oneself in MAC Address, with reference to communication forbidden list 205 detect whether registered with the subscription time section of communicating by letter that receives even the time period (step S1303) that part repeats.
Communication/response message generating unit 207 is judged as and not received intrusively by other radio communication devices under unduplicated situation, generates CTS frame (step S1304).Then, communication/response message generating unit 207 is sent the CTS frame that has generated to sending part 211, and sends (step S1305) by antenna 200.
On the other hand, in step S1303, under the situation that has the time period that repeats, registered forbid the time period (step S1306) in the incommunicado time period considered in 205 calculating with reference to the communication forbidden list.
Then, communication/response message generating unit 207 incommunicado time period that will calculate is set in reception time started 401 of nCTS frame and receives the holding time 402.In addition, at frame ID306 the frame ID (step S1307) identical with the RTS frame is set.In addition, under situation, their reception time started 401 is set and receives the holding time 402, and the input number is set its group number with a plurality of time periods that calculate.Then, communication/response message generating unit 207 is sent the nCTS frame that has generated to sending part 211, and sends (step S1308) by antenna 200.
In addition, handling (step S1105) for other reception, is that common reception is handled, and sorts portion 202 from communication data and pays data etc. to APD 203.
Then, below use Fig. 7 in wireless communication network shown in Figure 1, the action that radio communication device communicates mutually describes.Here sending data conditions with radio communication device 101 to radio communication device 102 is that example describes.
At first, but radio communication device 103 is in order to communicate the radio communication devices 104 in the communication zone 113, from nondirectional antenna transmission RTS signal 701 in zone 113.Radio communication device 102 is owing to being present in the zone 113, so reception is from the RTS signal 701 of radio communication device 103.At this moment, radio communication device 102 is registered in the information of being put down in writing in the RTS signal in the communication forbidden list as the incommunicado time period.Fig. 8 represents the registration data of this moment, respectively the MAC Address of the ID of dispatching station of the RTS signal 701 that recorder is arrived in sending source ID801; The reception destination station ID304 of the RTS signal 701 that recorder is arrived in receiving destination ID802; In the transmission time started 307 of using the RTS signal 701 that recorder is arrived in the zero hour 803; In the transmission holding time 308 that sends record RTS signal 701 in the holding time 804; The frame ID306 of the RTS signal 701 that recorder is arrived in frame ID; And the channel number (CH) 310 of the RTS signal 701 that recorder is arrived in receive channel ID.
Then, cts signal 702 sends to 103 pairs of zones 114 of radio communication device from radio communication device 104.Radio communication device 102 is because also be positioned at zone 114, so receive cts signal 702.At this moment, though radio communication device 102 will be registered in communication forbidden list 205 as the incommunicado time period, finish owing to when receiving RTS signal 701, register, so do not register again.
Then, but radio communication device 101 for communication zone 111 in radio communication device 102 begin to communicate and send RTS signal 703.
Then, radio communication device 102 is when radio communication device 101 receives RTS signal 703, identifies radio communication device 101 to oneself request communication according to the ID303 of dispatching station and the ID304 of receiving station of RTS frame.In addition, radio communication device 102 is according to sending the time started 307 and sending the time period that holding times 308 detection data send.Radio communication device 102 is with reference to communication forbidden lists 205, exists the situation of the part of repetition to detect in identical channel with call duration time section between radio communication device 103 that is write down before and the radio communication device 104 to the detected time period.The situation of the call duration time section of radio communication device 102 by detecting repetition, the situation and the incommunicado time period that can't in the time period of appointment, communicate via 704 pairs of radio communication devices of nCTS signal, 101 notices.But, be that then as common carrying out, corresponding RTS signal returns cts signal under the situation of different channel at the channel of communication forbidden list 205.
Then, radio communication device 101 is when receiving the nCTS signal, in the time period of having removed the incommunicado time period of notifying by radio communication device 102, obtain the time period that meets the transmission condition, the time period of reassigning 705 requirements of RTS signal communicates reservation.
Then, radio communication device 102 confirms that the time period of the incommunicado time period of registration in communication forbidden list 205 and the reservation of communicating by letter does not repeat when receiving the RTS signal, and to radio communication device 101 transmission cts signals 706.In addition, in communication reservation table 206, register, and refusal is from the transmission to oneself of other radio communication devices.Fig. 9 represents the registration data of this moment, has write down the ID303 of dispatching station of RTS signal 705 respectively in sending source ID901; In receiving destination ID902, write down the ID304 of receiving station of RTS signal 705; Using the transmission time started 307 of having write down RTS signal 705 in the zero hour 903; Sending the transmission holding time 308 of having write down RTS signal 705 in the holding time 904; In frame ID905, write down the frame ID306 of RTS signal 705; And write down " 0 " replying in 906.
Then, radio communication device 101 receives cts signal 706, when judgement can communicate, sets transmission time started t1 at event timer 209, and starts.At this moment, but also 112 radio communication device 103 and radio communication device 104 of the communication zone that is positioned at radio communication device 102 transmitted cts signals 706.Also identical in radio communication device 103 and radio communication device 104 with radio communication device 102, register the time period of notifying as the incommunicado time period respectively.
Then, carry out data from radio communication device 103 to radio communication device 104 and send 707～708.At this moment,, radio communication device 102 sends, so owing to be not to send to ignoring of oneself though receiving these data.
Then, radio communication device 101 carries out data and sends 709～710 after having passed through the transmission time started t1 that sets, and radio communication device 102 receives them.In addition, radio communication device 101 when also leaving the data that send, perhaps will be synchronously when radio communication device 102 sends data, the continuation by signal 711 notification datas and send the time t2 of RTS signal next time.In addition, the frame that uses this moment is identical with the RTS frame.
Then, radio communication device 102 it is registered in the communication reservation table, and refusal is from the transmission of other radio communication devices to oneself when obtaining the time t2 that sends RTS signal 712.
Then, radio communication device 101 sends RTS signal 712 at the time of appointment t2 to radio communication device 102, communicates reservation.This moment is notifying communication time started t3 again.
Later action is identical with the action after receiving RTS signal 705, radio communication device 102 is when receiving RTS signal 712, confirm with the forbidden list 205 of communicate by letter in incommunicado time period of registering do not repeat, to radio communication device 101 transmission cts signals 713.Afterwards, after elapsed time t3, radio communication device 101 carries out data and sends 714～715, and radio communication device 102 receives them.
In addition, in the present embodiment,, be not limited to this, also can notify to allow time period of communicating by letter though notify the incommunicado time period to the radio communication device in the source of transmission from the radio communication device that sends the destination.Thus, can only notify the time period that for the radio communication device of receiver side, is fit to, compare the length that can also shorten the CTS frame with notifying a plurality of incommunicado time periods.
In addition, in the present embodiment, radio communication device 102 is when existence is preengage from the communication of radio communication device 101 and under the situation of repetition of incommunicado time period, notified by nCTS frame 704 and not allowed to receive and the incommunicado time period, but be not limited to this, the conflict position (CO) 309 that the CTS frame can be set is only notified and is not allowed to receive.At this moment, the radio communication device that sends the source receives and does not allow the notice that receives, if necessary, then inquires the incommunicado time period to the radio communication device that sends the destination.And, the radio communication device that sends the destination is replied this inquiry notify the incommunicado time period.Thus, if the radio communication device in the source of transmission there is no need then not inquire the incommunicado time period, so the radio communication device of transmission source and transmission destination just can send unnecessary information.
As mentioned above, but radio communication device of the present invention sends employed time periods of data because can receive the RTS signal that other the radio communication device in the communication zone sends so can learn other radio communication devices that do not communicate with oneself.Therefore, the communication that sends to oneself can be avoided the time period ground that other radio communication devices send data and carries out, so radio communication device can be without interruption and reception sends to the data of oneself.
In addition, radio communication device of the present invention can often send or receive the RTS signal of this moment, and the possibility that can't receive is low so the RTS signal conflicts mutually.Therefore, realize above-mentioned action easily.
And radio communication device of the present invention is at the call duration time of the RTS signal of last notice transmission next time that sends data, so can more correctly receive the RTS signal.Constant by making from the transmission time started of RTS signal, can also carry out synchronous communication to data for sending the destination.
And in addition, radio communication device of the present invention is because can often receive the RTS signal, so but the radio communication device in the communication zone can receive the broadcasting that sends from other radio communication device.
In addition, radio communication device of the present invention is because can use a plurality of channel communications simultaneously, so can carry out more jumbo communication.
(second execution mode)
Figure 14 represents the structure of the radio communication device of present embodiment.Comparing difference with the structure of the radio communication device of record in the execution mode 1 is: have narrow-band reception portion 1402 and the arrowband sending part 1401 that can only receive and dispatch by the channel of arrowband except acceptance division 201, sending part 211.
In addition, in the present embodiment, the clean culture of the energy-conservation node of subtend sends uses RTS/CTS.
In Figure 14, arrowband sending part 1401 is restricted to the following narrow band channel of the value of predesignating by transmitting channel and sends RTS signal or multicast signals.In addition, sending part 211 is used for data transmission etc., and communication/response message generating unit 207 sends RTS signal or multicast signals to arrowband sending part 1401.
In addition, narrow-band reception portion 1402, its receive channel is defined as the channel below the bandwidth of predesignating in advance, receives RTS signal and multicast signals.Therefore, 1402 in narrow-band reception portion need get final product than the circuit formation that acceptance division 201 low speed are moved, and its consumed power is also lower than acceptance division 201.Communication data sorts portion 202 in the frame that sorts from acceptance division 201 and narrow-band reception portion 1402, finishes in Data Receiving, and when having moved to the receiving mode of RTS signal, carries out energy-conservation indication to acceptance division 201.In addition, communication data sorts portion 202 when narrow-band reception portion 1402 receives the RTS signal, to the recovery of acceptance division 201 indications from power save mode.Communication information analysis portion 204 is sorting portion 202 when receiving energy-conservation notice from communication data, send it to communication response message generating unit 207.Communication response message generating unit 207 is provided with the information of representing power save mode in the PS sign 504 that keeps Active Frame, comes to keep Active Frame from 1401 transmissions of arrowband sending part.Thus, the peripherad radio communication device notice of radio communication device is the situation of energy saver mode.In addition, acceptance division 201 stops receiving function, sort from communication data portion 202 receive recover indication before acceptance division 201 be in power save mode.
Identical about the inscape beyond these with first execution mode.
In addition, about communication operation, identical with first execution mode except sending this point of RTS signal from arrowband sending part 1401 and receiving this point of RTS signal by narrow-band reception portion 1402.
So, RTS signal and multicast signals carry out narrowband wireless communication, so the UWB radio communication device when finishing data transmit-receive, can make acceptance division 201 be in power save mode before receiving the RTS signal.Thus, even the carrier sense of UWB needs the UWB radio communication device of more electrical power often to be in the state that can receive the RTS signal, also can suppress consumed power lower.
In addition, in the present embodiment, communication data sorts portion 202 when narrow-band reception portion 1402 receives the RTS signal, to the recovery of acceptance division 201 indications from power save mode, but be not limited to this, communication data sorts the reservation transmitting time section that portion 202 can also be sent to the data of oneself by communication information analysis portion 204 notices, the only recovery of acceptance division 201 being indicated from power save mode in the time period that this reservation sends.Thus, realize further cutting down consumed power.In addition, radio communication device can spontaneously move to power save mode with acceptance division 201 according to the indication from APD 203, and perhaps the user can make acceptance division 201 be power save mode consciously.
In addition, but radio communication device can also be in advance sends RTS signal or multicast signals to other radio communication device request of communication zone around being positioned at by narrow band channel.This is sent request use maintenance Active Frame shown in Figure 19.
In Figure 19, different in the structure that has on channel specified domain 1901 this point with maintenance Active Frame shown in Figure 5.1901 requests are used for the channel of RTS signal or multicast signals transmission according to the channel specified domain.
Thus, other radio communication device can send RTS signal or multicast signals by narrow band channel according to request.
In addition, in the present embodiment, though use carrier signal to be illustrated, be not limited to this, can also make the signal of notice carrier wave is the preamble (preamble) of frame.
Thus, irrelevant with communication mode, also can use wireless communications method of the present invention for related agreement.
(the 3rd execution mode)
Figure 20 A, B are the dispensing device and the receiving systems of third embodiment of the invention.
At first the structure to the dispensing device of present embodiment describes.
In Figure 20 A, communication data generating unit 1520 is used to receive the indication from APD 203, generates communication datas such as content.
CS signal generating unit 1502 generates carrier-sense signal (CS signal), and it comprises the order and the communication channel that are used to send data are switched the control information of controlling, and data generating unit 1503 is used to generate Frame.
The first impulse waveform generating unit 1604 is used for and will offers oscillating portion 1607 by the impulse waveform after the CS signal modulation of pulse duration τ 1.In addition, the CS signal generating unit 1502 and the first impulse waveform generating unit 1604 are equivalent to control information pulse generating unit.
The second impulse waveform generating unit 1605 is used for and will offers oscillating portion 1607 by the impulse waveform after the data signal modulation of pulse duration τ 2.In addition, the data generating unit 1503 and the second impulse waveform generating unit 1605 are equivalent to data pulse generating unit of the present invention.
Here, τ 1 sets pulse duration wideer than τ 2.
Oscillating portion 1607 is used to export the oscillator signal corresponding with the impulse waveform of importing.Here, oscillator signal is the UWB signal according to the pulse duration regulation of the pulse signal of importing.
Enlarging section 1506 will be amplified to the wireless signal that sends needed amplitude and offer antenna 221, and the space is launched.Enlarging section 1506 and antenna 221 are equivalent to sending part of the present invention.
Then, the structure to the receiving system of present embodiment describes.
In Figure 20 B, enlarging section 1516 will be enlarged into by the signal that antenna 222 provides to receive handles needed amplitude.
It is under the situation of signal of wide-band modulation that broadband demodulator portion 1514 is used in received signal, carries out demodulation to received signal.In addition, broadband demodulator portion 1514 and data decoding part 1512 are equivalent to second acceptance division of the present invention.
Below, the action when communicating mutually for the dispensing device that as above constitutes and receiving system describes.
At first, the communication data generating unit 1520 of dispensing device generates communication data according to the indication from APD, and indicates the transmission of CS signals to CS signal generating unit 1502.
CS signal generating unit 1502 is after having generated the CS signal that comprises the ID that transmission destination receiving system is determined, to 1604 outputs of the first impulse waveform generating unit.
The first impulse waveform generating unit 1604 is divided in the pulse duration that oscillating portion 1607 uses with CS signal (23) with pulse duration τ 1.Thus, generate narrow band signal.
Afterwards, after narrow band signal amplifies by enlarging section 1506, launch from antenna 221.
Then, after amplifying, carry out demodulation process in narrowband demodulation portion 1515 by the 1516 pairs of signals that receive by the antenna 222 of receiving system in enlarging section.Then, whether be CS signal, under the situation that is the CS signal, sort portion 202 to communication data and notify if differentiating at carrier wave test section 1513.
Communication data sorts portion 202 under the situation that is judged as the control information that sends to oneself, and control power switch 1517 comes broadband demodulator portion 1514 and data decoding part 1512 power supplies are become operating state.
Then, the communication data generating unit 1520 of dispensing device is to the transmission of data generating unit 1503 designation datas.
The pulse duration that the second impulse waveform generating unit 1605 is divided input oscillating portion 1607 with pulse duration τ 2.Thus, generate the UWB signal.
Afterwards, the UWB signal is after being exaggerated by enlarging section 1506, from antenna 221 emissions.
Then, after amplifying, carry out demodulation process in broadband demodulator portion 1514 by the 1516 pairs of signals that receive by the antenna 222 of receiving system in enlarging section.After by data decoding part 1512 decodings, will be sorted portion 202 to communication data by the signal of demodulation and send.Sort data identification that portion 202 receives when going out it at communication data, send and finish to receive and handle to APD 203 for content.
As mentioned above, according to present embodiment, dispensing device can be easily is the UWB signal with bandwidth corresponding with pulse duration τ 1, τ 2 with control information and data-modulated.Promptly, in the present embodiment, with modulator approach be made as radio communication device based on the UWB of impulse radio by Broad-band Modulated Signal as the narrow pulse signal control oscillating portion of pulse duration, narrow-band modulated is controlled as the wide pulse signal of pulse duration, can generate the UWB signal with broadband and narrow band bandwidth thus.
In addition, the receiving system of present embodiment is in the stand-by period that occupies the more than half CS signal of call duration time, by making broadband demodulator portion is dormant state, makes the narrowband demodulation portion action lower than broadband demodulator portion consumed power, can realize the low receiving system of consumed power altogether thus.
In addition, in the present embodiment, though recorded and narrated the situation that comprises control information in the carrier-sense signal, being not limited to this, also can be the carrier-sense signal that does not comprise control information.At this moment, and whether be that to send to oneself carrier-sense signal irrelevant, as long as receive carrier-sense signal just with broadband demodulator portion and data decoding part releasing power save mode, make it can carry out the reception of broad-band channel by narrow band channel.
In addition, in the present embodiment,, also can be made as preamble though use carrier-sense signal to be illustrated.Thus, can realize the content identical according to various agreements with present embodiment.
(the 4th execution mode)
Use accompanying drawing that the structure of the radio communication device of present embodiment is described.
Figure 15 is the block diagram that explains the receiving function portion that the sending part 211 of radio communication device shown in Figure 14 of embodiment of the present invention 2 and sending function portion that arrowband sending part 1401 constitutes and acceptance division 201 and narrow-band reception portion 1402 constitute.
In Figure 15, sending function portion 1500 is connected with the antenna 1507 that sends wireless signal, and it is made of transmission signal generating unit 1501, narrowband modulation portion 1504, wide-band modulation portion 1505, the enlarging section 1506 that CS signal generating unit 1502 and data generating unit 1503 constitute.
The CS signal generating unit 1502 that sends signal generating unit 1501 generates carrier-sense signal (CS signal), and data generating unit 1503 suitably produces data-signal.
Wide-band modulation portion 1505 modulates input signal as broadband signals such as UWB.In addition, wide-band modulation portion 1505 is equivalent to second sending part of the present invention.
Enlarging section 1506 is used for providing the wireless signal 1009 that is amplified to the needed amplitude of transmission to antenna 1507, and the space is launched.
And the arrowband sending part 1401 among Figure 14 of above-mentioned CS signal generating unit 1502 and the narrowband modulation portion 1504 and second execution mode is suitable, and data generating unit 1503 is suitable with sending part 211 with wide-band modulation portion 1505.
In addition, receiving function portion 1510 links with the antenna 1507 that receives wireless signal 1009, and it is made of enlarging section 1516, narrowband demodulation portion 1515, broadband demodulator portion 1514, demodulation section 1511 and power switch 1517.In addition, demodulation section 1511 also is made of carrier wave test section 1513 and data decoding part 1512.
The signal that enlarging section 1516 is used for being provided by antenna 1507 is amplified to receive handles needed amplitude.
It is under the situation of signal of narrowband modulation that narrowband demodulation portion 1515 is used in received signal, carries out demodulation to received signal.At this moment, by modulating speed is set at below the value of predesignating, the demodulation speed of the signal after the modulation being carried out the narrowband demodulation portion 1515 of demodulation also can be set at below the value of having stipulated.That is, the responsiveness that constitutes the element of narrowband demodulation portion 1515 can be set lowlyer.Thus, can make the consumed power of narrowband demodulation portion 1515 below the value of predesignating.In addition, narrowband demodulation portion 1515 and carrier wave test section 1513 are equivalent to first acceptance division of the present invention.
It is under the situation of signal of wide-band modulation that broadband demodulator portion 1514 is used in received signal, carries out demodulation to received signal.In addition, broadband demodulator portion 1514 and data decoding part 1512 are equivalent to second acceptance division of the present invention.
And above-mentioned data decoding part 1512, broadband demodulator portion 1514 and power switch 1517 are equivalent to the acceptance division 201 of Figure 14 of second execution mode, and carrier wave test section 1513 and narrowband demodulation portion 1515 are equivalent to narrow-band reception portion 1402.
And communication data generating unit 1520 is equivalent to communication data generating unit 210, communication/response message generating unit 207, communication information analysis portion 204, event timer 209, communication forbidden list 205 and the communication reservation table 206 among Figure 14.
Below use Figure 17 and Figure 18 that the action of the radio communication device of the present embodiment of formation like this is described.
In addition, Figure 17 is the flow chart that transmission that radio communication device that expression send to be surveyed carries out is handled; Figure 18 is the flow chart that the reception carried out of radio communication device of expression receiver side is handled.
At first, the transmission signal generating unit 1501 of radio communication device sends under the situation of CS signal in CSMA/CA communication, will offer narrowband modulation portion 1504 from the CS signal of CS signal generating unit 1502.At this moment, same with first execution mode, when communication data generating unit 1520 receives to other the transmission request of content-data of radio communication device from APD 203, generation has been put down in writing and has been used to communicate by letter the transmission time started and the RTS frame that sends the holding time of reservation, and sends it to CS signal generating unit 1502 (step S1701).Then, CS signal generating unit 1502 comprises the RTS frame that is generated and offers narrowband modulation portion 1504 in the CS signal.Narrowband modulation portion 1504 receives it and is modulated to narrow band signal, and this narrow-band modulated is exported to enlarging section 1506.Enlarging section 1506 sends (step S1702) from antenna 1507 as wireless signal 1009 after this narrow-band modulated is amplified.
On the other hand, the narrowband demodulation portion 1515 of receiving function portion 1510 and carrier wave test section 1513 are in running order all the time.But broadband demodulator portion 1514 and data decoding part 1512 are stopped power supply by power switch 1517, generally are in the state (step S1801) that is called resting state (perhaps being power save mode).At this moment, receiving function portion 1510 carries out demodulation process in narrowband demodulation portion 1515 after amplifying by the 1516 pairs of signals that received by antenna 1507 in enlarging section.Whether differentiate at carrier wave test section 1513 then, is CS signal (step S1802).
Then, under the situation that is the CS signal, sort portion 202 to communication data and notify.In addition, in carrier wave, comprise and also sort portion 202 under the situation of RTS frame and send to communication data, same with first execution mode, carry out RTS frame shown in Figure 13 and handle (step S1803).
And, communication data sorts portion 202 and is receiving under the carrier case that comprises the call duration time subscription information that sends to oneself (step S1804), communication data sorts portion's 202 control power switchs 1517 and comes broadband demodulator portion 1514 and data decoding part 1512 power supplies are made its in running order (step S1805).In addition, the CTS frame that carries out in the RTS frame is handled or the transmission of nCTS frame and the transmission of the RTS frame that sending function portion 1501 carries out are similarly carried out.That is, communication data generating unit 1520 generates CTS frame or nCTS frame (step S1806), carries out (step S1807) according to the narrow band signal that comprises CTS frame or nCTS frame in the carrier wave from CS signal generating unit 1502.Accompany therewith, the carrier wave test section 1513 of receiving function portion 1510 just receives the carrier wave (step S1703) that comprises CTS frame or nCTS frame.Then, carrier wave test section 1513 sends to communication data with the CTS frame and sorts portion 202, and communication data sorts portion 202 and carries out CTS frame processing (step S1704) shown in Figure 12.
Its result sorts portion 202 notice can receive the time in communication data generating unit 1520 by communication data, and is same with first execution mode, generates data rows according to communication reservation (step S1705) in data generating unit 1503.1505 pairs of these data rows of wide-band modulation portion are modulated, and send (step S1706) as wireless signal 1009 from antenna 1507 after amplify enlarging section 1506.
On the other hand, receiving function portion 1510 when in running order, after the 1516 pairs of broadband signals that receive from antenna 1507 in enlarging section were amplified, broadband demodulator portion 1514 carried out demodulation process in data decoding part 1512 and broadband demodulator portion 1514.Afterwards, the restituted signal in 1512 pairs of broadbands of data decoding part is decoded, and sends to communication data and sorts portion 202 (step S1808).Sort portion 202 when identifying the data that receive and being content at communication data, send to APD 203 and receive processing and finish.
Data transmit-receive action between the radio communication device 101,102,103,104 of action like this is identical with the data transmit-receive action of first execution mode shown in Figure 7, but difference is: comprise the carrier signal 701,703,705 of RTS frame and comprise the CTS frame or the signal of nCTS frame the 702,704, the 706th, and narrow band signal, data-signal 707 to 712 is broadband signals.
Here, wide-band modulation portion 1505 can carry out communication at a high speed by adopting broadband modulation systems such as UWB.On the other hand, narrowband modulation portion 1504 is by adopting the narrowband modulation mode, though be that low speed can carry out the communication of low consumpting power.
Generally in most cases, in CSMA/CA communication, receive and wait the carrier sense time of biding one's time to occupy the more than half of whole call duration times, may not carry out communication at a high speed in the transmitting-receiving of this external CS signal.
Therefore, the structure of representing according to present embodiment is waiting and is biding one's time occupying the more than half carrier signal of call duration time, and making broadband demodulator portion is dormant state, the narrowband demodulation portion that makes consumed power be lower than broadband demodulator portion moves, and can realize the radio communication device that total consumed power is low thus.
In addition, in the above description, communication data sorts portion 202 under the situation that receives the carrier wave that comprises the call duration time subscription information that sends to oneself, control 1517 pairs of broadband demodulator portions 1514 of power switch and data decoding part 1512 power supplies, but be not limited to this, can only in communication reservation table 206, control power switch 1517 in the communication subscription time section of record and come broadband demodulator portion 1514 and data decoding part 1512 power supplies.At this moment, can make to the conduction time of broadband demodulator portion 1514 and data decoding part 1512 the shortlyest, can further reduce the consumed power of radio communication device.
(the 5th execution mode)
Use accompanying drawing that the structure of the radio communication device of present embodiment is described.
The block diagram of Figure 16 other structures that to be expression suitable with the narrowband modulation portion 1504 of the radio communication device shown in Figure 15 of four embodiment of the invention and wide-band modulation portion 1505.
In Figure 16, be: replace narrowband modulation portion 1504 among Figure 15 and wide-band modulation portion 1505 and possess the first impulse waveform generating unit 1604, the second impulse waveform generating unit 1605 and oscillating portion 1607 with the difference of the radio communication device of the 4th execution mode.
The first impulse waveform generating unit 1604 is used for providing the impulse waveform of modulating according to the CS signal of pulse duration τ 1 to oscillating portion 1607.
The second impulse waveform generating unit 1605 is used for providing impulse waveform according to the data signal modulation of pulse duration τ 2 to oscillating portion 1607.
Here, τ 1 sets pulse duration wideer than τ 2.
Oscillating portion 1607 outputs and the corresponding oscillator signal of importing of impulse waveform.Here, oscillator signal is the UWB signal according to the pulse duration regulation of the pulse signal of importing.
According to said structure, by the pulse duration of dividing input oscillating portions 1607, can easily the signal from CS signal generating unit 1502 and data generating unit 1503 be modulated to UWB signal respectively with bandwidth corresponding with pulse duration τ 1, τ 2 with the pulse duration τ 1 of the first impulse waveform generating unit 1604 and the second impulse waveform generating unit 1605, τ 2.Promptly, radio communication device in the present embodiment, that with the UWB of impulse radio be modulator approach by Broad-band Modulated Signal as the narrow pulse signal control oscillating portion of pulse duration, narrow-band modulated is controlled as the wide pulse signal of pulse duration, can generate the UWB signal with broadband and narrow band bandwidth thus.In addition, other structure and action are identical with the 4th execution mode.
As mentioned above, in the present embodiment, be that the radio communication device of modulator approach switches bandwidth by simple structure with the UWB of impulse radio, can when waiting for carrier signal, communicate thus by narrow band signal; When data communication, communicate by broadband signal.Thus, the radio communication device of present embodiment can constitute the low radio communication device of total consumed power.
Use on the industry
The present invention is used for carrying out AdHoc communication and waits wireless communications method and radio communication when communicating by letter to fill Put, be suitable for when further reducing the consumed power that receives under the wait state, avoiding wireless with other The communication contention aware of communicator.
Symbol description
101,102,103,104 radio communication devices
But 111,112,113,114 communication zones
200,221,222 antennas
201 acceptance divisions
202 communication datas sort section
203 APDs
204 communication information analysis portion
205 communication forbidden lists
206 communication reservation tables
207 communication/response message generating units
209 event timers
210 communication data generating units
211 sending parts
1401 arrowband sending parts
1402 narrow-band reception sections
1500 sending function sections
1501 transmitted signal generating units
1502 CS signal generating units
1503 data generating units
1504 narrowband modulation sections
1505 wide-band modulation sections
1506,1516 enlarging sections
1507 antennas
1510 receiving function portions
1511 demodulation sections
1512 data decoding part
1513 carrier wave test sections
1514 broadband demodulator portions
1515 narrowband demodulation portions
1517 power switchs
1520 communication data generating units
1,604 first impulse waveform generating units
1,605 second impulse waveform generating units
1607 oscillating portions
2001,2003 antennas
The wireless machine in 2002 arrowbands
2004 pulse wireless machines
Claims (7)
1. a wireless communications method is characterized in that,
The channel that carries out data communication as first radio communication device and second radio communication device, except the initial stage is first channel of dormant state, has the second channel that often to communicate by letter with the consumed power that is lower than described first channel, described first radio communication device and described second radio communication device are the super broad band radio communication devices
Described wireless communications method has following steps:
Described first radio communication device sends control information to described second radio communication device by described second channel, comprises the call duration time reserve requests information of having put down in writing the time period of carrying out the data transmission in the described control information;
Described second radio communication device receives described control information by described second channel, makes the Data Receiving of described first channel in running order;
Described first radio communication device and described second radio communication device make the reception of described first channel turn back to dormant state after the described first channel transceiver data;
The call duration time reserve requests information that comprises in the described control information that described second radio communication device receives is when sending to the information of oneself, send call duration time reservation response message by described second channel, described call duration time reservation response message is to have added the information that has received the communication reservation that sends to oneself of notifying in described call duration time reserve requests information;
But be arranged in the 3rd radio communication device of the communication range of described first radio communication device and described second at least one device of radio communication device, receive from the described call duration time reserve requests information of described first radio communication device with from least one side in the described call duration time reservation response message of described second radio communication device by described second channel, and the time period of putting down in writing in described call duration time reserve requests information or the described call duration time reservation response message was stored as the time period of forbidding sending;
Described the 3rd radio communication device is according to the received and dispatched time period of the described time period decision of forbidding sending oneself of being stored;
Described first radio communication device specified time period in described call duration time reserve requests information uses first channel to send data.
2. wireless communications method according to claim 1 is characterized in that,
Described first channel is the broadband transfer path, and described second channel is the arrowband transfer path of modulation speed below the value of predesignating.
3. wireless communications method according to claim 1 is characterized in that,
Also have: described second radio communication device uses described second channel to send the step of described call duration time reserve requests information to the described first radio communication device request;
Described first radio communication device sends described control information according to the described request from described second radio communication device by described second channel.
4. wireless communications method according to claim 1 is characterized in that,
Described first radio communication device also carries out multicast to described second radio communication device by described second channel.
5. a radio communication device is characterized in that, comprising:
First acceptance division, it receives preamble by the narrow band channel that can often receive, and also comprises the call duration time reserve requests information of having put down in writing the time period of carrying out the data transmission in the described preamble;
Second acceptance division, its channel by ultra broadband receives data, and has power saving function;
Communication data sorts portion, according to the described preamble that receives from described first acceptance division, whether differentiate is the information that sends to oneself, control the power saving function of described second acceptance division, after the channel of described ultra broadband had received data, the described communication data portion of sorting made described second acceptance division be in power save mode, is when sending to the preamble of oneself when what received by described first acceptance division, remove the power save mode of described second acceptance division, carry out the Data Receiving of the channel of described ultra broadband;
First sending part, when the call duration time reserve requests information that comprises in the described preamble from described first acceptance division is when sending to the information of oneself, send call duration time reservation response message by described narrow band channel, described call duration time reservation response message is the information that additional notifications has received the communication reservation that sends to oneself in described call duration time reserve requests information;
The communication storage list, at least one time band in the time period that will put down in writing by described call duration time reserve requests information and described call duration time reservation response message that described first acceptance division receives from other radio communication devices, forbid that as transmission the time period stores
Communication response message generating unit forbids that according to the described transmission that described storage list is stored the time period determines the received and dispatched time period of oneself;
Second sending part sends data with described ultra-wideband channel in described call duration time reserve requests information in specified time period.
6. radio communication device is characterized in that having:
First acceptance division, it comes receiving control information by the narrow band channel that can often receive, and comprises the call duration time reserve requests information of having put down in writing the time period of carrying out the data transmission in the described control information;
Second acceptance division by the channel reception data of ultra broadband, and has power saving function;
Communication data sorts portion, whether differentiate according to the described control information that is received by described first acceptance division is the information that sends to oneself, and control the power saving function of described second acceptance division, after the channel of described ultra broadband has received data, the described communication data portion of sorting makes described second acceptance division be in power save mode, when what received by described first acceptance division is when sending to the control information of oneself, remove the power save mode of described second acceptance division, carry out the Data Receiving of described ultra-wideband channel; First sending part, when the call duration time reserve requests information that comprises in the described control information from described first acceptance division is when sending to the information of oneself, send call duration time reservation response message by described narrow band channel, described call duration time reservation response message is the information that additional notifications has received the communication reservation that sends to oneself in described call duration time reserve requests information;
The communication storage list, at least one time band in the time period that will put down in writing by described call duration time reserve requests information and described call duration time reservation response message that described first acceptance division receives from other radio communication devices, forbid that as transmission the time period stores
Communication response message generating unit forbids that according to the described transmission that described storage list is stored the time period determines the received and dispatched time period of oneself;
Second sending part sends data with described ultra-wideband channel in described call duration time reserve requests information in specified time period.
7. according to claim 5 or 6 described radio communication devices, it is characterized in that, also comprise:
Communication information analysis portion is extracted the identifier of transmission source radio communication device and the subscription time section that data send from described call duration time reserve requests information;
The communication reservation table when being described communication information analysis portion oneself in the transmission destination of described control data, carries out the interrelated line item of going forward side by side with described identifier and described subscription time section;
Communication response message generating unit is created on the call duration time reservation response message that has added the normal information that receives of notice in the described call duration time reserve requests information.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2004161052 | 2004-05-31 | ||
| JP161052/2004 | 2004-05-31 | ||
| JP147886/2005 | 2005-05-20 |
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| CN1898914A CN1898914A (en) | 2007-01-17 |
| CN100499916C true CN100499916C (en) | 2009-06-10 |
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| CNB2005800014164A Expired - Fee Related CN100490571C (en) | 2004-05-31 | 2005-05-30 | Radio communication method and radio communication device |
| CNB2005800014179A Expired - Fee Related CN100499916C (en) | 2004-05-31 | 2005-05-30 | Radio communication method and radio communication device |
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| CNB2005800014164A Expired - Fee Related CN100490571C (en) | 2004-05-31 | 2005-05-30 | Radio communication method and radio communication device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4831081B2 (en) * | 2008-01-22 | 2011-12-07 | ソニー株式会社 | Transmitting apparatus and frame rate conversion system |
| KR20090129303A (en) * | 2008-06-11 | 2009-12-16 | 엘지전자 주식회사 | Method for random access in directional communication system |
| KR20090129304A (en) | 2008-06-11 | 2009-12-16 | 엘지전자 주식회사 | Method for power control of wireless device |
| CN102959902B (en) * | 2010-04-12 | 2017-06-13 | 高通股份有限公司 | Detect the delimiter for carrying out low overhead communication in a network |
| CN105874847B (en) * | 2013-12-25 | 2019-10-25 | 华为技术有限公司 | Method for sending information and device |
| CN104507174B (en) * | 2014-12-12 | 2018-05-18 | 京信通信系统（中国）有限公司 | The data transmission method and system of wireless access points and terminal |
| CN112351477B (en) * | 2019-08-08 | 2022-04-15 | 大唐移动通信设备有限公司 | Transmission and detection method of physical downlink control channel, network equipment and terminal |
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2005
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| CN100490571C (en) | 2009-05-20 |
| CN1898914A (en) | 2007-01-17 |
| CN1898913A (en) | 2007-01-17 |
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