CN101877605A - Wireless receiving and transmitting device and method used for avoiding radio signal collision in electronic device - Google Patents

Wireless receiving and transmitting device and method used for avoiding radio signal collision in electronic device Download PDF

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Publication number
CN101877605A
CN101877605A CN2009101377305A CN200910137730A CN101877605A CN 101877605 A CN101877605 A CN 101877605A CN 2009101377305 A CN2009101377305 A CN 2009101377305A CN 200910137730 A CN200910137730 A CN 200910137730A CN 101877605 A CN101877605 A CN 101877605A
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China
Prior art keywords
wireless
signal
receiving
transmitting
time point
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CN2009101377305A
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Chinese (zh)
Inventor
林育俊
苏义峰
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Ralink Technology Corp Taiwan
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Ralink Technology Corp Taiwan
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Priority to CN2009101377305A priority Critical patent/CN101877605A/en
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Abstract

The invention provides a wireless receiving and transmitting device used for avoiding radio signal collision in an electronic device. The device comprises a first wireless module and a second wireless module, wherein the first wireless module comprises a first wireless receiving and transmitting unit and an indication signal generating unit; the first wireless receiving and transmitting unit is used for receiving and transmitting a radio signal of a first wireless communication system; the indication signal generating unit is used for generating an indication signal before the first wireless receiving and transmitting unit starts to receive and transmit the radio signal so as to indicate the first wireless receiving and transmitting unit to receive and transmit the radio signal at a first time point; the second wireless module comprises a second wireless receiving and transmitting unit and a transmission control unit, wherein the second wireless receiving and transmitting unit is used for receiving and transmitting the radio signal of a second wireless communication system; and the transmission control unit is used for controlling the second wireless receiving and transmitting unit to stop receiving and transmitting the radio signal at the first time point according to the indication signal.

Description

Be used for electronic installation and avoid the wireless transmitter and the method for radio signal collision
Technical field
The present invention relates to a kind of wireless transmitter and method that an electronic installation is avoided radio signal collision that be used for, especially refer to that a kind of will being set at than the wireless module of weak collision immunocompetence has the higher channel right to use, collide chance of occurrence to reduce, and then promote efficiency of transmission.
Background technology
Evolution along with wireless communication technology, prior art has developed and different wireless communication systems, as mobile communication system (as GSM, 3G, LTE), radio area network (as Wi-Fi, WiMax), wireless personal domain network (as Bluetooth, Zigbee) etc.For fear of the interference between wireless communication system, the different wireless communication system can adopt different operational frequency bands usually and use the different communication technology (comprising percentage modulation coding, encryption etc.).Yet, under finite wireless resources, certainly will there be the part wireless communication system need adopt the identical operations frequency band, may therefore cause the problem of phase mutual interference.
For instance, according to communication protocol IEEE 802.15.1 and the IEEE802.11 of Bluetooth and Wi-Fi, both operation frequency ranges are (IEEE 802.11a is at 5GHz) near the 2.4GHz in ISM (Industrial Scientific Medical) frequency range all.ISM band is the Industrial Scientific Medical frequency range, and it is the radio band that countries in the world keep, and is used for the application of industry, scientific research and microwave medical treatment aspect.Use these frequency ranges to need not licence, only need to observe certain standard, to avoid that other frequency range is caused interference.In this case, though the communication protocol difference of Bluetooth and Wi-Fi, the modulation of using, coded system are also different, but because both frequency ranges are identical, therefore signal collision (Collision) may take place, that is (Bluetooth or Wi-Fi) receiver receives the signal of Bluetooth and Wi-Fi simultaneously, thereby the generation that leads to errors.
When Bluetooth and Wi-Fi generation signal collision, Wi-Fi can see through automatic retransmission mechanism (Automatic Repeat reQuest, ARQ) again Data transmission to receiver, and see through transmission rate adjustment mechanism (Rate Adaptation) reduction transmission rate, to improve data transmission success.Yet compared to Wi-Fi, Bluetooth is a kind of lower powered wireless connect technology, and in other words, the Wi-Fi signal is easy to cause Bluetooth receiver " saturated " (Saturation).Specifically, wireless receiver need be looked status signal transmission in receiving the process of wireless signal, suitably adjust Amplifier Gain (Gain), so that radiofrequency signal is downconverted to fundamental frequency effectively, and then demodulation, decodes correct content.In this case, when Bluetooth and Wi-Fi generation signal collision, the Wi-Fi signal of Bluetooth receiver meeting because of receiving that suddenly power is relatively large causes amplifier saturated, so that can't correctly operate.What is more, and when signal collision took place, Wi-Fi conveyer (Transmitter) meeting reduced transmission rate, make the same transmission packets time therefore to increase, and the chance that is meaning the signal collision generation improves more, may cause grave error.
For instance, when getting online without being tethered to a cable through Wi-Fi, see through peripheral equipments such as Bluetooth and earphone, Wireless Keyboard, slide-mouse in addition and set up binding as if computer system.At this moment, if the signal collision situation takes place, then the user still can see through Wi-Fi and carries out wireless Internet access than low speed, but the peripheral equipment of Bluetooth may interrupt at this point or line is in poor shape, thereby has reduced the convenience when using.
Above-mentioned signal collision situation is to be example with Bluetooth and Wi-Fi, and these two kinds of wireless communication technologys often are applied to same electronic product, as notebook computer, personal digital assistant etc., so the problem of signal collision obviously and serious.In addition, owing to use ISM band to need not licence, in other words, the wireless communication system of other shared this frequency range all may meet with the problem of signal collision.Therefore, problem how to improve signal collision just becomes one of problem that industry makes great efforts.
Summary of the invention
Therefore, main purpose of the present invention promptly is to provide a kind of wireless transmitter and method that an electronic installation is avoided radio signal collision that be used for.
The present invention discloses a kind of wireless transmitter that an electronic installation is avoided radio signal collision that is used for, and includes one first wireless module and one second wireless module.This first wireless module includes one first wireless transmit/receive units, is used for receiving and dispatching the wireless signal of one first wireless communication system; And an index signal generation unit, be used for before this first wireless transmit/receive units starts transmitting-receiving one wireless signal, producing an index signal, begin to receive and dispatch this wireless signal to indicate this first wireless transmit/receive units in very first time point.This second wireless module includes one second wireless transmit/receive units, is used for receiving and dispatching the wireless signal of one second wireless communication system; And a transmission control unit, be used for according to this index signal, control this second wireless transmit/receive units and begin to stop the transmitting/receiving wireless signal in this very first time point.
The present invention discloses a kind of method that an electronic installation is avoided radio signal collision that is used in addition, this electronic installation comprises the wireless signal that one first wireless module and one second wireless module are used for receiving and dispatching one first wireless communication system and one second wireless communication system respectively, this method includes before this first wireless module starts transmitting-receiving one wireless signal, this first wireless module produces an index signal, is used to refer to this first wireless module and begins to receive and dispatch this wireless signal in very first time point; And according to this index signal, this second wireless module begins to stop the transmitting/receiving wireless signal in this very first time point.
Description of drawings
Fig. 1 is the schematic diagram of the embodiment of the invention one wireless transmitter.
The schematic diagram of coherent signal waveform under two kinds of operation situations in Fig. 2 A and Fig. 2 B difference displayed map 1.
Fig. 3 is the operation workflow figure of the wireless transmitter of Fig. 1.
[main element symbol description]
10 wireless transmitters
100 first wireless modules
102 second wireless modules
104 first wireless transmit/receive units
106 index signal generation units
108 second wireless transmit/receive units
110 transmission control units
The IND_msg index signal
The HALT_msg control signal
WR_sys_1 first wireless communication system
WR_sys_2 second wireless communication system
P1, P2, P3 grouping
P1_ACK, P2_ACK confirmation
The P3_Seg fragment
30 flow processs
300,302,304,306 steps
Embodiment
The present invention avoid the mode of radio signal collision be weak by having " collision immunity " (CollisionImmune) transceiver module of ability obtain preferential running power, with the generation of avoiding colliding.In the present invention, " collision immunity " ability is meant that when wireless signal bumps radio receiving transmitting module is kept the ability of running, and this ability is relevant with signal power, debug mechanism, retransmission mechanism etc., and is not limited thereto, when deciding on practical application.For example, system in Bluetooth and Wi-Fi coexistence, " collision immunity " ability of Wi-Fi transceiver module obviously is better than " collision immunity " ability of Bluetooth transceiver module, therefore, the present invention is set at the Bluetooth transceiver module has preferential running power, that is when the Bluetooth transceiver module operated, the Wi-Fi transceiver module should stop the transmitting-receiving running of wireless signal.Detailed concept please refer to following explanation.
Please refer to Fig. 1, Fig. 1 is the schematic diagram of the embodiment of the invention one wireless transmitter 10.Wireless transmitter 10 is used for an electronic installation (as computer system, personal digital assistant etc.) and avoids radio signal collision, and it includes one first wireless module 100 and one second wireless module 102.Wherein, the collision immunocompetence of first wireless module 100 is weaker than the collision immunocompetence of second wireless module 102.Specifically, first wireless module 100 includes one first wireless transmit/receive units 104 and an index signal generation unit 106.First wireless transmit/receive units 104 is used for receiving and dispatching the wireless signal RF1 of one first wireless communication system WR_sys_1, index signal generation unit 106 then is used for producing an index signal IND_msg in second wireless module 102, to indicate the signal transmitting and receiving situation of first wireless transmit/receive units 104.Second wireless module 102 includes one second wireless transmit/receive units 108 and a transmission control unit 110.Second wireless transmit/receive units 108 is used for receiving and dispatching the wireless signal RF2 of one second wireless communication system WR_sys_2, the index signal IND_msg that transmission control unit 110 is then produced according to index signal generation unit 106, export control signal HALT_msg to the second wireless transmit/receive units 108, to control the running of second wireless transmit/receive units 108.
Therefore, when first wireless transmit/receive units 104 starts transmitting/receiving wireless signal RF1, index signal generation unit 106 can produce index signal IND_msg in transmission control unit 110, with indicate first wireless transmit/receive units 104 will be in a specific period transmitting/receiving wireless signal RF1, then transmission control unit 110 can be controlled the transmitting-receiving running that second wireless transmit/receive units 108 stops wireless signal, to avoid the generation of signal collision.In other words, because the collision immunocompetence of first wireless module 100 is weaker than the collision immunocompetence of second wireless module 102, therefore in the present invention, first wireless module 100 has preferential running power.That is to say, in case first wireless module 100 is desired transmitting/receiving wireless signal RF1, even second wireless module 102 is operating, must wait for that still first wireless module 100 is finished the transmitting-receiving running after, could begin (or continuation) and operate.
Be noted that, when second wireless module 102 suspends running because of first wireless module 100, because transmission environment does not have any change, transmission control unit 110 should be controlled second wireless transmit/receive units 108 and keep identical transmission set point, as transmission rate, through-put power, gain etc., and after recovering transmission, adopt original transmission set point and transmit.In this case, before not receiving the echo message of a grouping, second wireless transmit/receive units 108 promptly is subjected to the control of transmission control unit 110 and during the running that stops to receive and dispatch, after waiting to recover transmission, second wireless transmit/receive units 108 must be adopted previous transmission set point and retransmit, and should not be subjected to transmission rate to adjust the control of mechanism (Rate Adaptation) and reduce transmission rate.In simple terms, in the present invention, first wireless module 100 has the higher channel right to use, and when stopping using wireless channel as if second wireless module 102 because of first wireless module 100, the associated transport set point must be kept unanimity, to avoid influencing efficiency of transmission.
Wireless transmitter 10 shown in Figure 1 is embodiments of the invention, and this area tool knows that usually the knowledgeable ought can do different modifications according to this, and is not limited thereto.For instance, the implementation of index signal IND_msg and control signal HALT_msg is not limited to particular types, as long as can stop the running of second wireless transmit/receive units 108 in good time.For instance, please refer to Fig. 2 A and Fig. 2 B, the coherent signal waveform is in the schematic diagram of two kinds of possible operation situations in Fig. 2 A and Fig. 2 B difference displayed map 1.In Fig. 2 A and Fig. 2 B, index signal IND_msg and control signal HALT_msg realize with square wave.In Fig. 2 A, first wireless transmit/receive units 104 sends a grouping P1 in a time point t1, and receive affirmation (ACK) the information P1_ACK of grouping P1 in a time point t2 after, the running that stops to receive and dispatch.Therefore, the index signal IND_msg that index signal generation unit 106 is produced can rise to high level before time point t1, and falls back low level behind time point t2.Similarly, the control signal HALT_msg that produced of transmission control unit 110 also is identical change.In addition, shown in Fig. 2 A, before first wireless transmit/receive units 104 sent grouping P1, second wireless transmit/receive units 108 was not was not received and dispatched any grouping.In comparison, in Fig. 2 B, first wireless transmit/receive units 104 is during time point t3 to t4, and output one grouping P2 also receives corresponding affirmation information P2_ACK.If before time point t3, second wireless transmit/receive units, 108 positive outputs, one grouping P3, but, make second wireless transmit/receive units 108 stop the transmission of P3 of dividing into groups because of control signal HALT_msg, and only finish the transmission of the part fragment P3_Seg of grouping P3.In this case, treat that first wireless transmit/receive units 104 is finished transmitting-receiving running after, low level can fall back in control signal HALT_msg, then second wireless transmit/receive units 108 can be set with identical transmission, the output P3 that divides into groups.
Be noted that among Fig. 2 A and Fig. 2 B, index signal IND_msg and control signal HALT_msg system are example with the square wave, in fact, other implementation also can be used for the present invention, and is not limited thereto.For example, in Fig. 2 A, index signal generation unit 106 can be exported a pulse signal with one first level before time point t1, and output one has the pulse signal of one second level behind time point t2, that is index signal IND_msg is realized by the pulse signal of varying level.And transmission control unit 110 also can have identical variation.In addition, among Fig. 2 A and Fig. 2 B, the square width of index signal IND_msg and control signal HALT_msg all is slightly larger than during the running of first wireless transmit/receive units 104, and this only is an example, also can be equal to during the running of first wireless transmit/receive units 104.
In addition, in Fig. 1, first wireless transmit/receive units 104 and second wireless transmit/receive units 108 represent to carry out in first wireless module 100 and second wireless module 102 square of wireless signal transmitting-receiving respectively.In fact, may include software (as driver) and hardware (as antenna, frequency mixer, modulating device etc.) part in first wireless transmit/receive units 104 or second wireless transmit/receive units 108, so the realization of index signal generation unit 106 and transmission control unit 110 answers viewing system required and change to some extent.For example, if index signal generation unit 106 and transmission control unit 110 all are when realizing with software, transmission control unit 110 can receive the index signal IND_msg that index signal generation unit 106 is produced passively, or whether active inquiry index signal generation unit 106 produces index signal IND_msg.These variations all belong to scope of the present invention, and are not limited thereto, and every wireless module that will have weak " collision immunity " ability is made as more preferentially running, all belong to category of the present invention with the system that avoids colliding generation, method etc.
In addition, above stated specification all is to be example with two wireless modules, in fact, in the framework of multi-wireless module, also can adopt notion of the present invention.That is the wireless module with the most weak " collision immunity " ability has the power of override running, and corresponding variation should be that those skilled in the art can derive with reference to embodiments of the invention and draw, so do not give unnecessary details.
The function mode of above-mentioned wireless transmitter 10 can reduce a flow process 30, as shown in Figure 3.Flow process 30 comprises following steps:
Step 300: beginning.
Step 302: before first wireless transmit/receive units 104 started transmitting/receiving wireless signal RF1, index signal generation unit 106 produced index signal IND_msg, is used to refer to the operation situation of first wireless transmit/receive units 104.
Step 304: according to index signal IND_msg, the running of transmission control unit 110 controls second wireless transmit/receive units 108.
Step 306: finish.
The detailed description of flow process 30 can not given unnecessary details at this with reference to aforementioned.
In the prior art, when the wireless module generation signal collision situation of shared frequency range, therefore the wireless module that has than the weak collision immunocompetence may interrupt line, thereby reduces the convenience when using.In comparison, in the present invention, have the higher channel right to use, therefore can avoid the generation of colliding, and keep the normal operation of transmission than the wireless module of weak collision immunocompetence.
In sum, at the wireless module of shared frequency range in the same electronic installation, the present invention can reduce the collision chance of occurrence, to promote efficiency of transmission.
The above only is preferred embodiment of the present invention, and all equalizations of doing according to claim of the present invention change and modify, and all should belong to covering scope of the present invention.

Claims (20)

1. one kind is used for the wireless transmitter that an electronic installation is avoided radio signal collision, includes:
One first wireless module includes:
One first wireless transmit/receive units is used for receiving and dispatching the wireless signal of one first wireless communication system;
And
One index signal generation unit is used for producing an index signal before this first wireless transmit/receive units starts transmitting-receiving one wireless signal, begins to receive and dispatch this wireless signal to indicate this first wireless transmit/receive units in very first time point; And
One second wireless module includes:
One second wireless transmit/receive units is used for receiving and dispatching the wireless signal of one second wireless communication system; And
One transmission control unit is used for according to this index signal, controls this second wireless transmit/receive units and begins to stop the transmitting/receiving wireless signal in this very first time point.
2. wireless transmitter as claimed in claim 1, wherein this transmission control unit is used for keeping a transmission set point of this second wireless transmit/receive units in addition.
3. wireless transmitter as claimed in claim 1, wherein this transmission control unit is used for controlling this second wireless transmit/receive units and begins to stop to receive an echo message that has transmitted grouping corresponding in this very first time point.
4. wireless transmitter as claimed in claim 1, wherein this index signal of being produced of this index signal generation unit is used to refer to this first wireless transmit/receive units in addition and finishes this wireless signal of transmitting-receiving in one second time point.
5. wireless transmitter as claimed in claim 4, wherein this first wireless transmit/receive units receives an echo message of this wireless signal in this second time point, to finish this wireless signal of transmitting-receiving.
6. wireless transmitter as claimed in claim 4, this index signal is a square wave, and a rising edge of this square wave (Rising Edge) is positioned at before this very first time point, and a decline edge (Descending Edge) of this square wave is positioned at after this second time point.
7. wireless transmitter as claimed in claim 4, wherein this transmission control unit is used in addition according to this index signal, controls this second wireless transmit/receive units and recovers the transmitting/receiving wireless signal in this second time point.
8. wireless transmitter as claimed in claim 7, wherein this transmission control unit is used for controlling this second wireless transmit/receive units in addition with the preceding transmission set point of this very first time point, recovers the transmitting/receiving wireless signal.
9. wireless transmitter as claimed in claim 7, wherein this transmission control unit is used for controlling the grouping that this second wireless transmit/receive units re-transmission one is not identified (Non-Acknowledged) in addition.
10. wireless transmitter as claimed in claim 1, wherein the wireless transmitted power of this first wireless communication system is lower than the wireless transmitted power of this second wireless communication system.
11. wireless transmitter as claimed in claim 1, wherein this first wireless communication system is a Bluetooth communication system, and this second wireless communication system is a radio area network system.
12. one kind is used for the method that an electronic installation is avoided radio signal collision, this electronic installation comprises the wireless signal that one first wireless module and one second wireless module are used for receiving and dispatching one first wireless communication system and one second wireless communication system respectively, and this method includes:
Before this first wireless module starts transmitting-receiving one wireless signal, produce an index signal, be used to refer to this first wireless module and begin to receive and dispatch this wireless signal in very first time point; And
According to this index signal, this second wireless module begins to stop the transmitting/receiving wireless signal in this very first time point.
13. method as claimed in claim 12, wherein according to this index signal, this second wireless module is put the step that begins to stop the transmitting/receiving wireless signal in this very first time, comprises a transmission set point of keeping this second wireless module.
14. method as claimed in claim 12, wherein according to this index signal, this second wireless module begins to stop the step of transmitting/receiving wireless signal in this some very first time, comprises this second wireless module and begins to stop to receive an echo message that has transmitted grouping corresponding in this very first time point.
15. method as claimed in claim 12, wherein this index signal is used to refer to this first wireless module in addition and finishes this wireless signal of transmitting-receiving in one second time point.
16. method as claimed in claim 15, wherein this first wireless module receives an echo message of this wireless signal in this second time point, to finish this wireless signal of transmitting-receiving.
17. method as claimed in claim 15, wherein this index signal is a square wave, and a rising edge of this square wave is positioned at before this some very first time, and a decline edge of this square wave is positioned at after this second time point.
18. method as claimed in claim 15, it comprises in addition according to this index signal, and this second wireless module recovers the transmitting/receiving wireless signal in this second time point.
19. method as claimed in claim 18, wherein according to this index signal, this second wireless module comprises this second wireless module with the preceding transmission set point of this very first time point in the step of this second time point recovery transmitting/receiving wireless signal, recovers the transmitting/receiving wireless signal.
20. method as claimed in claim 18, wherein according to this index signal, this second wireless module comprises this second wireless module and retransmits a grouping that is not identified as yet in the step of this second time point recovery transmitting/receiving wireless signal.
CN2009101377305A 2009-04-29 2009-04-29 Wireless receiving and transmitting device and method used for avoiding radio signal collision in electronic device Pending CN101877605A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107105435A (en) * 2016-02-19 2017-08-29 华为技术有限公司 Method and apparatus for carrying out traffic frame transmission

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Publication number Priority date Publication date Assignee Title
US20040022210A1 (en) * 2002-08-01 2004-02-05 Frank Edward H. Cooperative transceiving between wireless interface devices of a host device
CN1801809A (en) * 2004-08-09 2006-07-12 美国博通公司 Method and system for wireless communication
CN101414966A (en) * 2007-10-18 2009-04-22 美国博通公司 System and method for improving bluetooth performance

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040022210A1 (en) * 2002-08-01 2004-02-05 Frank Edward H. Cooperative transceiving between wireless interface devices of a host device
CN1801809A (en) * 2004-08-09 2006-07-12 美国博通公司 Method and system for wireless communication
CN101414966A (en) * 2007-10-18 2009-04-22 美国博通公司 System and method for improving bluetooth performance

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Publication number Priority date Publication date Assignee Title
CN107105435A (en) * 2016-02-19 2017-08-29 华为技术有限公司 Method and apparatus for carrying out traffic frame transmission

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Application publication date: 20101103