CN101247144A - Bluetooth device and its band width management method - Google Patents
Bluetooth device and its band width management method Download PDFInfo
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- CN101247144A CN101247144A CNA2007100049357A CN200710004935A CN101247144A CN 101247144 A CN101247144 A CN 101247144A CN A2007100049357 A CNA2007100049357 A CN A2007100049357A CN 200710004935 A CN200710004935 A CN 200710004935A CN 101247144 A CN101247144 A CN 101247144A
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Abstract
The present invention provides a bluetooth device and a method for managing the band width. The remote devices are connected by establishing a synchronous facing connecting channel. The intensity of the sound signal is monitored. If the intensity of the sound signal is larger than the set value, the slot of the synchronous facing connecting channel is used for conveying the sound signal to the remote device. If the intensity of the sound signal is smaller than the set value, the band width accounted by the slot is dynamically released for avoiding the waste of the band width.
Description
Technical field
The invention relates to a kind of wireless device and bandwidth management method thereof, and particularly relevant for a kind of blue-tooth device and bandwidth management method thereof.
Background technology
Bluetooth (Bluetooth) is a kind of short distance, wireless communication technology cheaply, communicates by letter in the frequency hopping mode and disturbs to reduce.Because Bluetooth technology possesses these advantages is arranged, make many in recent years wired electronics be equipped with, all develop into wireless blue-tooth device gradually, for example: bluetooth earphone, Bluetooth microphone, bluetooth mouse and keyboard or the like.And these blue-tooth devices can transmit information with radio wave between computer, mobile phone (Mobile Phone), personal digital assistant (PDA:Personal Data Assistant), intelligent household appliance or the like electronic installation.
Bluetooth technology is with mode transmission information between main control end (Master) and subordinate end (Slave) of time division duplex (Time Division Duplex), and its data transmission rate can reach 1Mbps.Bluetooth technology is supported two kinds of connection types, a kind of is that asynchronous nothing connects (Asynchronous Connectionless, hereinafter to be referred as ACL) passage, another kind of for synchronously towards connection (Synchronous Connection Oriented is hereinafter to be referred as SCO) passage.Wherein the ACL passage is used for transmitting data or instruction (Command), and the SCO passage then is used for transmitting sound.Main control end can be carried out transfer of data to a plurality of subordinate ends simultaneously, and different master controls-subordinate end can use different connection types to (Master-slave Pairs), but its bandwidth summation still has fixed upper limit.
Fig. 1 is known bluetooth device transmissions schematic diagram, please refer to Fig. 1.Main control end 10 is an example with the mobile phone, and subordinate end 20 is an example with the bluetooth earphone.In the conventional art, when under Bluetooth technology BT1.1 version, carrying out transfer voice, can between main control end 10 and subordinate end 20, set up the SCO passage earlier.Can keep fixing slot (Slot) when the SCO passage is set up, be used for transmitting at regular time and quantity voice signal.Wherein, each slot is 625 microseconds.When main control end 10 will transmit voice signal to subordinate end 20, then send voice signal to subordinate end 20 by sending slot (TX Slot is hereinafter to be referred as the TX slot); Otherwise when subordinate end 20 will transmit voice signal to main control end 10, then send voice signal to main control end 10 by receiving slot (RX Slot is hereinafter to be referred as the RX slot).In other words, the situation of choppy voice takes place in known technology in transmission course for fear of sound, will use for the transmission voice signal with the RX slot by distribution T X slot every fixing a period of time SCO passage, and TX slot and RX slot can paired appearance, and its packet length is equal.When yet the user converses in reality, be not to continue to speak incessantly.That is to say that when not having voice signal to be transmitted the SCO channel still can distribute the TX slot of fixed frequency and RX slot to use for the transmission voice signal.Though this practice has been kept good speech quality, quite waste transmission bandwidth.
Specification after the Bluetooth technology BT1.2 version then develops and heavier-duty synchronously towards connecting (EnhanceSynchronous Connection Oriented is called for short ESCO) passage.After the online foundation of ESCO passage, the user can readjust TX slot and the paired cycle that occurs of RX slot, but the ESCO channel at most only can be with its cycle stretch-out to 254Slot slot.In other words, just about 0.15 second time T X slot and RX slot just must occur once.In the practical application, still can waste bandwidth when not having voice signal to transmit.In addition, the BT1.2 version can be set the packet length of TX slot and RX slot, makes its packet length asymmetric, but TX slot and RX slot still must occur in pairs.That is to say, although not speech simultaneously of when conversation both sides, the ESCO passage still can distribution T X slot with the RX slot for transfer voice, at this moment TX slot and RX slot one of them then become unnecessary bandwidth waste.Both sides do not have the time of speaking even, and ESCO channel allocation TX slot and RX slot are exactly to make an unnecessary move waste bandwidth for transfer voice at all.
Summary of the invention
The invention provides a kind of bluetooth bandwidth management method, by the intensity of monitored sounds signal, adjust synchronous slot bandwidth, to save the Bluetooth transmission bandwidth towards connecting channel.
The present invention provides a kind of blue-tooth device in addition, and by the intensity of monitored sounds signal, whether decision discharges towards the slot bandwidth of connecting channel synchronously, to help the transmission of other data.
The present invention proposes a kind of bluetooth bandwidth management method, comprises foundation synchronously towards connecting channel, to connect remote-control device.The intensity of monitored sounds signal.If intensity greater than set point, then uses synchronous slot towards connecting channel to transmit voice signal to remote-control device.If intensity less than set point, then discharges the shared bandwidth of slot.
In one embodiment of this invention, above-mentioned bluetooth bandwidth management method comprise use transducer with monitoring intensity whether greater than set point, or use digital signal processor that voice signal is carried out computing, to judge that whether intensity is greater than set point.Wherein remote-control device is the main control end or the subordinate end of bluetooth standard.Wherein slot is for sending slot or receiving slot.If intensity is greater than set point, and the shared bandwidth of slot discharges, then redistributes slot, to transmit voice signal.During redistributing slot, with working area stored voice signal.
The present invention proposes a kind of blue-tooth device in addition, comprises watch-dog and telecommunication circuit.Wherein watch-dog is in order to the intensity of monitored sounds signal.Telecommunication circuit couples watch-dog, in order to set up synchronously towards connecting channel, to connect remote-control device.If intensity greater than set point, then uses synchronous slot towards connecting channel to transmit voice signal to remote-control device, if intensity less than set point, then discharges the shared bandwidth of slot.
In one embodiment of this invention, above-mentioned blue-tooth device, wherein remote-control device is the main control end or the subordinate end of bluetooth standard, watch-dog is a sound transducer.Among another embodiment, watch-dog is a digital signal processor, and voice signal is carried out computing, to judge that whether intensity is greater than set point.Wherein slot is for sending slot or receiving slot.Wherein if intensity greater than set point, and the shared bandwidth of slot discharges, then telecommunication circuit is redistributed slot, to transmit voice signal.During redistributing slot, telecommunication circuit is with working area stored voice signal.
The present invention dynamically discharges the slot bandwidth of SCO channel by the intensity of monitored sounds signal.If greater than set point, then distributing the slot of SCO passage to transmit voice signal, voice signal intensity gives remote-control device.If voice signal intensity less than set point, then discharges the shared bandwidth of slot, use and avoid bandwidth waste.
Beneficial effect of the present invention:
1. the main control end of blue-tooth device is by watch-dog sensing sound, when intensity of sound during less than set point, dynamically discharges the shared bandwidth of TX slot, uses for ACL passage or RX slot, avoids the waste of bandwidth.
2. the main control end of blue-tooth device is by watch-dog sensing sound, when intensity of sound during greater than set point, distribution T X slot transmits voice signal to the subordinate end for main control end, and can specify the frequency of occurrences, packet length and the bag kind of TX slot, and bandwidth can more effectively be utilized.
3. the subordinate end of blue-tooth device is by watch-dog sensing sound, when intensity of sound during less than set point, dynamically discharges the shared bandwidth of RX slot, uses for ACL passage or TX slot, avoids the waste of bandwidth.
4. the subordinate end of blue-tooth device is by watch-dog sensing sound, when intensity of sound during greater than set point, distribute the RX slot to give main control end, and can specify frequency, packet length and the bag kind of the appearance of RX slot, bandwidth can more effectively be utilized for subordinate end transmission voice signal.
For above-mentioned feature and advantage of the present invention can be become apparent, preferred embodiment cited below particularly, and conjunction with figs. are described in detail below.
Description of drawings
Fig. 1 is known bluetooth device transmissions schematic diagram.
Fig. 2 is according to the illustrated blue-tooth device structure chart of the preferred embodiment of the present invention.
Fig. 3 is the flow chart of steps according to the illustrated bluetooth bandwidth management method of the preferred embodiment of the present invention.
Fig. 4 is the blue-tooth device structure chart according to the increase working area of the preferred embodiment of the present invention.
Embodiment
Fig. 2 is according to the illustrated blue-tooth device structure chart of the preferred embodiment of the present invention, please refer to Fig. 2.Blue-tooth device 30 has comprised telecommunication circuit 50 and watch-dog 60.Blue-tooth device 30 is a main control end in the present embodiment, and be that example describes with the mobile phone, those of ordinary skill in the art should know, " mobile phone " that present embodiment is given an example only is a specific embodiment, in another embodiment, blue-tooth device 30 can be personal computer, personal digital assistant, mobile computer or the like ..., so the present invention should not be defined in this specific embodiment.The telecommunication circuit 50 of blue-tooth device 30 is used to set up the SCO channel and is connected (wireless connections) with remote-control device 40.In the present embodiment, remote-control device 40 is the subordinate end, and is example with the bluetooth earphone.Watch-dog 60 is in order to the intensity of monitoring from the voice signal of base station reception, use the shared bandwidth of slot whether decision telecommunication circuit 50 discharges the SCO channel, watch-dog 60 is an example with digital signal processor (Digital Signal Processor is called for short DSP) in the present embodiment.Then do detailed explanation at the various situations that discharge the slot bandwidth.
Fig. 3 is the flow chart of steps according to the illustrated bluetooth bandwidth management method of the preferred embodiment of the present invention, please be simultaneously with reference to Fig. 2 and Fig. 3.At first execution in step S301 sets up the SCO channel by telecommunication circuit 50 and is connected with remote-control device 40.When the SCO channel connects, the SCO channel can dispose the TX slot, to give remote-control device 40 from the transmission of sound signals that base station receives for blue-tooth device 30, also can specify the TX slot frequency of occurrences, packet length (Packet Length) and bag kind (Packet Type) (step S302) simultaneously.Then step S303 by the voice signal of watch-dog 60 sensing blue-tooth devices 30 received base stations whether greater than set point, and by 60 pairs of voice signals execution of watch-dog computing, whether to differentiate intensity of sound greater than set point, whether the amplitude that for example can calculate voice signal surpasses set point, or carries out fourier transform whether to differentiate voice signal intensity above set point.And the benefit of step 303 is, the noise of avoiding causing because of environmental noise is mistaken as the sound of dialogue, so the interference that can avoid environmental noise to cause.
Accept above-mentioned steps, if voice signal is less than set point execution in step S304 then, (Link Manager Protocol LMP) dynamically discharges the shared bandwidth of TX slot and uses for other transmission, for example for the ACL channel transmission data or for RX slot transmission voice signal by the connection management agreement.Otherwise, if voice signal represents then that greater than set point the base you has dialogue sound to transmit, and therefore checks whether the TX slot is released (step S305).If the TX slot is not released, then telecommunication circuit 50 uses the TX slot of SCO channel to transmit voice signal to remote-control device 40 (step S306).Otherwise if the TX slot is released, then redistribute the TX slot, with transmission voice signal (step S307).
In addition, Fig. 4 please refer to Fig. 4 according to the blue-tooth device structure chart in the preferred embodiment of the present invention, increase working area.Thereby after receiving sound, blue-tooth device 30 just distribute the TX slot to cause the situation of leading portion voice signal loss for transmission, working area 70 also can be set with stored voice signal (step S308), after treating that the TX slot is set up, again the transmission of sound signals in working area 70 is gone out.So then can avoid the intercepted situation of leading portion sound.Those of ordinary skill in the art should be known in that working area 70 can realize in modes such as buffers, does not then give unnecessary details at this.
In another embodiment, the blue-tooth device 30 of Fig. 4 also can be the subordinate end, for example, is bluetooth earphone.The watch-dog 60 of blue-tooth device 30 is the volume transducer, and monitoring is from the voice signal intensity of audio signal reception device 80 (for example being microphone).And telecommunication circuit 50 is similar to the above embodiments, does not repeat them here.In the present embodiment, remote-control device 40 is that example describes with the mobile phone, those of ordinary skill in the art should know, " mobile phone " that present embodiment is given an example only is a specific embodiment, in another embodiment, blue-tooth device 30 can be personal computer, personal digital assistant, mobile computer or the like ..., so the present invention should not be defined in this kind specific embodiment.The user converses by audio signal reception device 80.Watch-dog 60 is used to monitor the voice signal intensity of user's conversation, uses the shared bandwidth of slot whether decision telecommunication circuit 50 discharges the SCO channel.Then do detailed explanation at the various situations that discharge the slot bandwidth.
Please more simultaneously with reference to Fig. 3 and Fig. 4.At first execution in step S301 sets up the SCO channel by telecommunication circuit 50 and is connected with remote-control device 40.When the SCO channel connected, the SCO channel can dispose the RX slot and give remote-control device 40 for telecommunication circuit 50 with transmission of sound signals, also can specify the RX slot frequency of occurrences, packet length and bag kind (step S302) simultaneously.Then at step S303 by watch-dog 60 sensing users' voice signal whether greater than set point.The benefit of step 303 is that the noise of avoiding causing because of environmental noise is mistaken as the sound of dialogue, so the interference that can avoid environmental noise to cause.
Accept above-mentioned steps, if the intensity of voice signal is less than set point, 50 execution in step S304 of telecommunication circuit discharge the shared bandwidth of RX slot by the connection management protocol dynamic and use for other transmission, for example for the ACL channel transmission data or for TX slot transmission voice signal.Otherwise if voice signal represents then that greater than set point the earphone end has dialogue sound to transmit, so telecommunication circuit 50 checks whether the RX slot is released (step S305).If the RX slot is not released, then telecommunication circuit 50 uses the RX slot of SCO channel to transmit voice signal to remote-control device 40 (step S306).Otherwise if the RX slot is released, then telecommunication circuit 50 is redistributed the RX slot, with transmission voice signal (step S307).Thereby after receiving sound, blue-tooth device 30 just distribute the RX slot to cause the situation of leading portion voice signal loss for transmission, telecommunication circuit 50 can utilize working area 70 to come stored voice signal (step S308), after treating that the RX slot is set up, telecommunication circuit 50 is gone out the transmission of sound signals in working area 70 again.So then can avoid the intercepted situation of leading portion sound.Those of ordinary skill in the art should be known in that working area 70 can realize in modes such as buffers, does not then give unnecessary details at this.
Though the present invention discloses as above with preferred embodiment; yet it is not to be used for limiting the present invention; those of ordinary skill under any in the technical field; without departing from the spirit and scope of the present invention; can carry out a little change and retouching, so protection scope of the present invention should be with being as the criterion that claims were defined.
Claims (20)
1. bluetooth bandwidth management method is characterized in that comprising:
Set up one synchronously towards connecting channel, to connect a remote-control device;
Monitor the intensity of a voice signal;
If above-mentioned intensity greater than a set point, then uses an above-mentioned synchronous slot towards connecting channel to transmit the tut signal to above-mentioned remote-control device; And
If above-mentioned intensity less than above-mentioned set point, then discharges the shared bandwidth of above-mentioned slot.
2. bluetooth bandwidth management method according to claim 1 is characterized in that also comprising:
Set up above-mentionedly during, specify the frequency of occurrences and the packet length of above-mentioned slot synchronously towards connecting channel.
3. bluetooth bandwidth management method according to claim 2 is characterized in that also comprising:
Set up above-mentionedly during, specify the bag kind of above-mentioned slot synchronously towards connecting channel.
4. bluetooth bandwidth management method according to claim 1 is characterized in that main control end or subordinate end that wherein above-mentioned remote-control device is a bluetooth standard.
5. bluetooth bandwidth management method according to claim 1 is characterized in that also comprising:
Use a transducer whether to monitor above-mentioned intensity greater than above-mentioned set point.
6. bluetooth bandwidth management method according to claim 1 is characterized in that also comprising:
Use a digital signal processor that the tut signal is carried out computing, to judge that whether above-mentioned intensity is greater than above-mentioned set point.
7. bluetooth bandwidth management method according to claim 6 is characterized in that wherein above-mentioned computing is a fourier transform.
8. bluetooth bandwidth management method according to claim 1 is characterized in that wherein above-mentioned slot is for sending slot or receiving slot.
9. bluetooth bandwidth management method according to claim 1 is characterized in that also comprising:
If above-mentioned intensity is greater than above-mentioned set point, and the shared bandwidth of above-mentioned slot discharges, then redistributes above-mentioned slot, to transmit the tut signal.
10. bluetooth bandwidth management method according to claim 9 is characterized in that also comprising:
During redistributing above-mentioned slot, store the tut signal with a working area.
11. a blue-tooth device is characterized in that comprising:
One watch-dog is in order to monitor the intensity of a voice signal; And
One telecommunication circuit, couple above-mentioned watch-dog, in order to set up one synchronously towards connecting channel, to connect a remote-control device, if above-mentioned intensity is greater than a set point, then use an above-mentioned synchronous slot to transmit the tut signal, if above-mentioned intensity less than above-mentioned set point, then discharges the shared bandwidth of above-mentioned slot to above-mentioned remote-control device towards connecting channel.
12. blue-tooth device according to claim 11 is characterized in that wherein above-mentioned telecommunication circuit sets up above-mentionedly during synchronously towards connecting channel, specifies the frequency of occurrences and the packet length of above-mentioned slot.
13. blue-tooth device according to claim 12 is characterized in that wherein above-mentioned telecommunication circuit sets up above-mentionedly during synchronously towards connecting channel, also specifies the bag kind of above-mentioned slot.
14. blue-tooth device according to claim 11 is characterized in that main control end or subordinate end that wherein above-mentioned remote-control device is a bluetooth standard.
15. blue-tooth device according to claim 11 is characterized in that wherein above-mentioned watch-dog is a sound transducer.
16. blue-tooth device according to claim 11 is characterized in that wherein above-mentioned watch-dog is a digital signal processor, and the tut signal is carried out a computing, to judge that whether above-mentioned intensity is greater than above-mentioned set point.
17. blue-tooth device according to claim 16 is characterized in that wherein above-mentioned computing is a fourier transform.
18. blue-tooth device according to claim 11 is characterized in that wherein above-mentioned slot is for sending slot or receiving slot.
19. blue-tooth device according to claim 11, it is characterized in that wherein if above-mentioned intensity greater than above-mentioned set point, and the shared bandwidth of above-mentioned slot discharges, then above-mentioned telecommunication circuit is redistributed above-mentioned slot, to transmit the tut signal.
20. blue-tooth device according to claim 19 is characterized in that wherein that during redistributing above-mentioned slot above-mentioned telecommunication circuit stores the tut signal with a working area.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007100049357A CN101247144B (en) | 2007-02-12 | 2007-02-12 | Bluetooth device and its band width management method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007100049357A CN101247144B (en) | 2007-02-12 | 2007-02-12 | Bluetooth device and its band width management method |
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| Publication Number | Publication Date |
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| CN101247144A true CN101247144A (en) | 2008-08-20 |
| CN101247144B CN101247144B (en) | 2011-11-23 |
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| CN2007100049357A Active CN101247144B (en) | 2007-02-12 | 2007-02-12 | Bluetooth device and its band width management method |
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Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB0131117D0 (en) * | 2001-12-31 | 2002-02-13 | Nokia Corp | Frequency hopping spread spectrum communication system |
| CN1581720A (en) * | 2003-07-30 | 2005-02-16 | 华冠通讯股份有限公司 | Wireless communication system with bluetooth module built in safety cap |
| US7183979B1 (en) * | 2005-08-24 | 2007-02-27 | Accton Technology Corporation | Dual-band patch antenna with slot structure |
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