CN1741484A - Method and system for sharing a single antenna in radio communication - Google Patents
Method and system for sharing a single antenna in radio communication Download PDFInfo
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- CN1741484A CN1741484A CN 200510085772 CN200510085772A CN1741484A CN 1741484 A CN1741484 A CN 1741484A CN 200510085772 CN200510085772 CN 200510085772 CN 200510085772 A CN200510085772 A CN 200510085772A CN 1741484 A CN1741484 A CN 1741484A
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Abstract
A method and system for sharing a single antenna on platforms with collocated Bluetooth and IEEE 802.11 b/g devices are provided. A single antenna may be utilized for communication of Bluetooth HV3 frame traffic and wireless local area network (WLAN) communication based on a time multiplexing approach. At least one antenna switch may be utilized to configure an antenna system to enable Bluetooth and WLAN coexistence via the single antenna. Configuration signals may be generated by a Bluetooth radio device and/or by a WLAN radio device to configure the antenna system. A default configuration for the antenna system may provide WLAN communication between a station and a WLAN access point until Bluetooth communication becomes a priority.
Description
Technical field
The present invention relates to the interference in the communication system.More specifically, of the present invention relating to, a kind ofly have and putting the method and system of sharing single antenna on the platform of bluetooth and IEEE 802.11b/g equipment.
Technical background
Wireless Personal Network (WPAN) is popularized in a large amount of the use because of flexibility and convenience that they are provided in connection.The WPAN system as those systems based on bluetooth (BT) technology, connects by near radio is provided, and allows the interior connection of 10 meters scopes, and has replaced being used for connecting the cable and/or the distribution of the trouble of ancillary equipment and/or portable terminal.Be that wireless lan (wlan) provides and has been positioned at the connectivity of big slightly geographical space as the device in a, solitary building or the included zone of university with the WPAN system forms contrast.Wlan system typically operates in 100 meters scopes according to the standard of IEEE 802.11 standards, is commonly used to replenish the ability to communicate that is installed in the traditional cable LAN (LANs) in the same geographical area with wlan system.
In some cases, wlan system can operate with the WPAN systematic collaboration, thereby the full functionality of enhancing is provided to the user.For example, when a kneetop computer or a portable wireless terminal equipment are connected to the wlan network of university's scope by an access point (AP) that is positioned at this building, Bluetooth technology can be used to this kneetop computer or portable wireless terminal equipment are connected to a peripheral unit, as, a keyboard, mouse, earphone, and/or printer.
Bluetooth technology and WLAN wireless device, as being used for as those of portable wireless terminal equipment, running in the worker of 2.4GHZ (2.4000-2.4835GHZ), section, doctor (ISM) unlicensed band usually.Other wireless device as being used for those of cordless telephone, also can operate in the ISM unlicensed band.ISM band use for many near radios a suitable low-cost solution is provided in, when a plurality of users operate simultaneously, it also has some shortcomings.For example, because limited bandwidth must hold a plurality of users with frequency spectrum share.A plurality of active users may cause the great interference between the operating means.In addition, in some cases, microwave oven also can operate under this frequency spectrum, thus the great interference or the block signal of can exert an influence bluetooth and/or WLAN transmission.
When a Bluetooth radio of operation and a WLAN wireless device in as a wireless device, two kinds of dissimilar interference effects can take place at least.At first, when an interference signal appears in the transmission medium together with main signal, can cause a low signal to interference and noise ratio (SINR).In this case, Bluetooth signal may be interfered the WLAN signal, and perhaps, the WLAN signal can be interfered Bluetooth signal.When this bluetooth and WLAN wireless device and when putting, second kind of interference effect can take place, that is to say that when their position was very close to each other, can make had the little rate of a penetrating path loss between they corresponding wireless front end receivers.In this case, the isolation between blue teeth wireless front end and the WLAN wireless front end can be low to moderate as 10dB.As a result, a wireless device may make the front end of another wireless device that transmission is become insensitive.In addition, because bluetooth has been used through-put power control, when the signal to noise ratio (snr) of bluetooth connection hanged down, juxtaposed Bluetooth radio may promote its power rank, thereby has further effectively damaged the front end isolation between the wireless device.The low noise amplifier of wireless front end (LNA) can not be positioned at before the channel selection filter, and can be saturated by the signal in the ISM frequency band easily, as those from and put transmission.This saturated meeting causes the sensitiveness of the receiver part of wireless front end to reduce, thereby can reduce the ability of wireless front end detecting and demodulation desired signal.
Packet communications in the wlan system need be from the affirmation of receiver so that communication carried out.When the isolation between the juxtaposed wireless device was low, dark when the degree that the collision between WLAN communication and the bluetooth communication is interfered mutually is more higher than isolation, this can make the WLAN communication slow down, because access point is not confirmed grouping.This situation can continue to break away from the WLAN station until access point under the screw.If for fear of this situation, and the WLAN communication of putting in the wireless device is endowed priority, has precedence over all bluetooth communications, then do not have the bluetooth packet communication of relay capabilities can lack the communication bandwidth this moment.In addition, this method also can make other bluetooth packet communication lack the communication access.Therefore the operation of juxtaposed WLAN/ Bluetooth radio should keep higher WLAN communication rate, can insert bluetooth communication where necessary simultaneously.
Different technology has developed the low isolation problem that occurs in the coexistence operation between juxtaposed bluetooth and the WLAN wireless device to solve.These technology can be utilized frequency and/or time quadrature mechanism to reduce and put interference between the wireless device.In addition, these technology can be produced by so-called cooperation or non-coordination mechanism in bluetooth and the WLAN wireless device, and wherein cooperation refers to any direct communication between the agreement.For example, Bluetooth technology utilizes AFH (AFH) as reducing frequency division multiplexing (FDM) technology that channel is interfered.In AFH, the feature of physical channel be in micro bluetooth network with 1600 times/second frequency, between the 791MHz channel pseudorandom frequency hopping.AFH provides and can has been used for avoiding frequency by spread spectrum system by a blue-tooth device, the non-coordination mechanism shared as wlan system.In some cases, Bluetooth radio can based on as do not revised its frequency-hopping mode by the frequency in the ISM frequency spectrum of other CU.
Even used frequency multiplexing technique, great interference still can take place, because the strong signal in indivedual channels still can become block signal, reduce the sensitiveness of wireless front end receiver, just the noise floor of receiver has been increased to and can't have known the point that detects the received signal place.For example, when the isolation between the wireless device only was 10dB, the 15dBm signal of a WLAN wireless front end reflector generation can become the high reject signal or the jam signal of juxtaposed Bluetooth radio receiver.Similarly, when Bluetooth radio is being launched and WLAN wireless device when receiving, when particularly blue teeth wireless front end emission device is with 20dBm, classification 1 operation, if the isolation between the wireless device reduces, then WLAN wireless device receiver can be reduced its sensitiveness by Bluetooth transmission.Because the high power capacity of WLAN and BT wireless device chip, characteristic cheaply, surface acoustic wave (SAW) filter more expensive, that block signal can be filtered out near channel is not generally adopted, and the interference between the juxtaposed WLAN/ Bluetooth radio is still paid close attention to for the people in the application of WPAN.
Other technology can recommend rules-Di 15.2 parts described as those in the IEEE802.15.2-2002 information technology based on the coexistence mechanism of cooperation: Wireless Personal Network and other coexistence between the wireless device of unlicensed band running.For example, these technology can comprise medium access control system (MAC) layer mechanism or physical layer (PHY) mechanism.MAC layer technology can comprise that mutual wireless medium inserts (AWMA) technology or transmitted in packets arbitration (PTA) technology.AWMA and PTA technology all provide the Time Division Multiplexing method to solve and put the isolation problem of wireless device.For example, the AWMA technology is divided into two parts at interval with a WLAN communication: one is used for wlan system, and another is used for the WPAN system.Each wireless system limited transmission in the time period that they distribute then.On the other hand, the PTA technology WLAN wireless device or the Bluetooth radio of having attempted providing one juxtaposed, having obeyed arbitration and approval for each communication.The communication request that PTA can refusal can lead to a conflict or interfere.PHY layer technology comprises, is located at a notch filter able to programme in the WLAN wireless device receiver, and it is used for filtering narrow frequency WPAN or bluetooth interference signal.These technology may cause the efficiency of transmission deficiency, or for reaching coexistence operation preferably, need additional hardware.
Other cooperation coexistence mechanism can be based on proprietary technology.For example, in some cases, and put firmware in the WLAN wireless device can be used to and put inquiry one status signals in the Bluetooth radio, to determine whether bluetooth communication is about to take place.But the inquiry Bluetooth radio must be carried out on the basis that quite continues, and the WLAN wireless device is shifted from its WLAN communication operation.If use the inquiry window to replace, wherein inquiring about window is that hundreds of microseconds are long, and during this period of time the WLAN wireless device is not carried out its WLAN protocol operation, and Bluetooth radio shows that bluetooth communication is about to carry out.In other cases, and put WLAN and Bluetooth radio can be utilized a drives interrupts referee method.In this respect, carry out interrupt operation and determine the suitable considerable processing time of communication schedule needs according to the preferential situation and the kind of WLAN and bluetooth packet.
Since occur in coexistence in the terminal and put interference or conflict between the wireless device, the antenna of separation or antenna array can be used in the agreement that each wireless device supports.But, use additional antenna hardware not only can cause high priced line, also can limit, as, the size of a mobile terminal device or shape.
By comparing with the present invention who describes in detail in conjunction with the accompanying drawings in the back, those skilled in the art can further see the more limitations and the shortcoming of conventional and conventional method.
Summary of the invention
A kind of having and putting the method and system of sharing single antenna on the platform of bluetooth and IEEE 802.11b/g equipment, in figure and/or description, done to prove absolutely more complete elaboration is partly arranged in claim in conjunction with at least one figure.
According to an aspect of the present invention, provide a kind of method that wireless telecommunications are provided, this method comprises:
In the station of processing at least one bluetooth (BT) communications protocol and a wireless lan (wlan) communications protocol:
Affirm a bluetooth priority signal;
Described station is set makes it to provide bluetooth communication by the single antenna based on described bluetooth priority signal, described single antenna is used for bluetooth and WLAN communication; And
When described bluetooth priority signal is affirmed, transmit blue-teeth data by described single antenna.
Preferably, this method further comprises: when described communication is finished, deny described BT priority signal.
Preferably, this method further comprises: when described BT priority signal is denied, reset described station to provide WLAN communication by described single antenna.
Preferably, this method further comprises: default to a setting that WLAN communication is provided.
Preferably, this method further comprises: first duplexer and second duplexer in the described station are set.
Preferably, this method further comprises: produce at least one signal that described first duplexer is set and with at least one signal of described second duplexer is set.
Preferably, this method further comprises: when described BT priority signal by certainly the time, described first duplexer is set and described second duplexer is the BT communication.
Preferably, this method further comprises: when described BT priority signal is denied, described first duplexer is set and described second duplexer is the WLAN communication.
Preferably, this method further comprises: third antenna switch in the described station is set to receive the BT communication or to receive the WLAN communication.
Preferably, this method further comprises: produce the signal that at least one is provided with described third antenna switch.
Preferably, this method further comprises: when described BT data comprise BT HV3 packet traffic, affirm described BT priority signal.
According to a further aspect in the invention, provide a system that is used for wireless telecommunications, this system comprises:
A station of handling at least one bluetooth (BT) communications protocol and a wireless lan (wlan) communications protocol, wherein said station comprises:
A Bluetooth radio that produces the bluetooth priority signal;
At least a portion at a described station of configuration, make it to provide by the single antenna based on generation bluetooth priority signal the WLAN radio equipment of bluetooth communication, wherein said single antenna is used for bluetooth and WLAN communication; And
When the bluetooth priority signal that is produced was affirmed, described Bluetooth radio was transmitted blue-teeth data by described single antenna.
Preferably, described BT wireless device is denied the BT priority signal of described generation.
Preferably, when described BT priority signal was denied, described WLAN wireless device was reset at least a portion at described station to provide WLAN communication by described single antenna.
Preferably, described station is defaulted as the setting of carrying out the WLAN communication.
Preferably, described station comprises one first duplexer and one second duplexer.
Preferably, described WLAN wireless device produces at least one signal that described first duplexer is set and with at least one signal of described second duplexer is set.
Preferably, when described BT priority signal was affirmed, described first duplexer is set described WLAN wireless device and described second duplexer is the BT communication.
Preferably, when described BT priority signal was denied, described first duplexer is set described WLAN wireless device and described second duplexer is the WLAN communication.
Preferably, described station comprises a third antenna switch.
Preferably, described BT wireless device produces the signal that at least one is provided with described third antenna switch.
Preferably, when described BT data comprised BT HV3 packet traffic, described BT wireless device is described BT priority signal certainly.
According to a further aspect in the invention, provide a kind of method that wireless telecommunications are provided, this method comprises:
In the station of at least one first communications protocol of processing and one second communications protocol;
Affirm one first communications protocol priority signal;
Dispose described station and make it to provide the first communications protocol communication by the single antenna based on the described first communications protocol priority signal, wherein said single antenna is used for the first and second communications protocol communications; And
When the described first communications protocol priority signal is affirmed, transmit the first communications protocol data by described single antenna.
Preferably, this method further comprises: when described communication is finished, deny the described first communications protocol priority signal.
Preferably, this method further comprises: when the described first communications protocol priority signal is denied, reset described station so that the second communications protocol communication to be provided by described single antenna.
Preferably, this method further comprises: give tacit consent to the setting that the second communications protocol communication is provided.
The details of these and other advantage of the present invention, feature and novel features and embodiment will obtain understanding more completely in following description and accompanying drawing.
Description of drawings
Figure 1A is the typical WLAN basic network block diagram of in the one embodiment of the invention, comprising the basic service group (BSS) who uses a common distribution system (DS).
Figure 1B is the typical WLAN basic network block diagram of in the one embodiment of the invention, comprising the basic service group (BSS) who has the station of supporting the WLAN/ Bluetooth coexistence.
Fig. 1 C be in the one embodiment of the invention one typical and be equipped with the block diagram that uses a model of the coexistence terminal of WLAN and Bluetooth radio.
Fig. 2 A is that in the one embodiment of the invention is typical in the BT HV3 frame of TX_BT signal and the communication sequential chart of WLAN transmission.
Fig. 2 B is the sequential chart of the sure example of a typical TX_BT signal in the one embodiment of the invention.
Fig. 3 A is the WLAN/ bluetooth cooperation wireless device architectural block diagram that in the one embodiment of the invention typically has two duplexers that are provided with by the WLAN wireless device.
Fig. 3 B is the WLAN/ bluetooth cooperation wireless device architectural block diagram that in the one embodiment of the invention typically has two duplexers that are provided with by WLAN wireless device and separator.
Fig. 3 C is the flow chart that in the one embodiment of the invention typically is provided with the WLAN/ bluetooth cooperation wireless device architecture among Fig. 3 A-3B.
Fig. 4 is that in the one embodiment of the invention typically has first duplexer that is provided with by the WLAN wireless device and the WLAN/ bluetooth cooperation wireless device architectural block diagram of second duplexer that is provided with by Bluetooth radio.
Fig. 5 A is the WLAN/ bluetooth cooperation wireless device architectural block diagram that in the one embodiment of the invention typically has three duplexers that are provided with by the WLAN wireless device.
Fig. 5 B is the flow chart that in the one embodiment of the invention typically is provided with the WLAN/ bluetooth cooperation wireless device architecture among Fig. 5 A.
Embodiment
Some embodiment of the present invention can share on a platform that has juxtaposed bluetooth and an IEEE 802.11b/g device in the method and system of single antenna and find.Single antenna can be used in the bluetooth HV3 frame and wireless lan (wlan) communication based on the time division multiplexing method.At least one duplexer can be used to be provided with an antenna system, to make bluetooth and WLAN coexistence by this single antenna.Signalization can be produced by Bluetooth radio and/or WLAN wireless device, so that this antenna system to be set.In one embodiment of the invention, the default setting of antenna system can provide WLAN communication between coexistence station and WLAN access point, become priority status until bluetooth communication.In bluetooth and WLAN wireless device, use single antenna that the production cost of coexistence terminal equipment is reduced.
Figure 1A is the typical WLAN basic network block diagram of in the one embodiment of the invention, comprising the basic service group (BSS) who uses a common distribution system (DS).With reference to Figure 1A, comprise a BSS 102a in this WLAN basic network 100, the 2nd BSS 102b, DS 104, cable network 106, inlet 108, the first access points (AP) 112a, the 2nd AP 102b, and a plurality of WLAN station (STA).This BSS102a and 102b represent the foundation construction frame of IEEE802.11 (WLAN) architecture, can be considered the group station (STA) under the direct control of single protocol function.The geographic area that is covered by a BSS is counted as primary service area (BSA).DS 104 is used for connecting BSS 102a and 102b, and comprising suitable hardware, logical circuit, circuitry and/or coding, they can be used as main network, is responsible for medium access control system (MAC) rank and transmits in WLAN basic network 100.As the IEEE802.11 prescribed by standard, DS 104 is independent realizations.For example, DS104 can utilize IEEE802.3 ethernet local area network, IEEE802.4 token bus LAN, IEEE802.5 token loop wire LAN, FDDI (FDDI) metropolitan area network (MAN) or other IEEE802.11 wireless medium to realize.DS 104 can utilize the physical media identical with a BSS 102a or the 2nd BSS 102b to realize.But DS 104 is logically different with BSS, only can be used on to transmit grouping between the BSS and/or transmit grouping between BSS and cable network 106.
Figure 1B is the typical WLAN basic network block diagram of in the one embodiment of the invention, comprising the basic service group (BSS) who has the station of supporting the WLAN/ Bluetooth coexistence.With reference to Figure 1B, the difference of the WLAN basic network 100 among this WLAN basic network 120 and Figure 1A is to have the station or the terminal that comprise among the BSS that at least one supports Bluetooth technology at least.In this respect, the 2nd BSS 102b comprises additional mobile terminal device or station, and as personal digital assistant (PDA) 110c and mobile phone 110d, and kneetop computer 110a wherein has Bluetooth function.Peripheral unit 114 is parts of the Wireless Personal Network (WPAN) supported of Bluetooth function kneetop computer.For example, kneetop computer 110a can link to each other with keyboard, mouse, printer, mobile phone, PDA or a series of earphone or microphone by Bluetooth technology, and wherein these devices and this kneetop computer 110a can form a special bluetooth piconet.Usually, a bluetooth piconet can comprise a main equipment or terminal equipment, and reaches seven from device or terminal.In the present embodiment, kneetop computer 110a can be equal to main Bluetooth terminal, and ancillary equipment 114 can be equal to from Bluetooth terminal.
Bluetooth function kneetop computer 110a shown in Figure 1B comprises a WLAN wireless device and a Bluetooth radio, they allow this kneetop computer respectively by AP 112b and this WLAN basic network communication and with this bluetooth piconet communication.Because the size of kneetop computer 110a is contained in the signal interference that can cause in the same terminal equipment between WLAN and the BT communication with WLAN and BT wireless device.When PDA110c and/or mobile phone 110d have Bluetooth function, the less factor of these coexistence terminal shape can cause occurring a little radio frequency (RF) path loss between WLAN and the BT wireless device, and causes the interference between WLAN and the BT communication most probably.
Fig. 1 C be in the one embodiment of the invention one typical and be equipped with the block diagram that uses a model of the coexistence terminal of WLAN and Bluetooth radio.With reference to figure 1C, mobile phone 110d comprises a WLAN wireless device with AP 112c communication.Path loss between AP112c and the mobile phone 110d can be, as, 10 meters 65dB.A formula that is used for calculating the RF path loss is provided in the IEEE802.15.2 draft.Mobile phone 110d also can have Bluetooth function, comprises one with bluetooth earphone 122 and/or have the Bluetooth radio of residential gateway 124 communications of blue teeth wireless phone function.Because the factor that mobile phone 110d shape is less, WLAN and Bluetooth radio are so approaching each other in same coexistence terminal, make that a wireless device can be by another desensitising to such an extent as to the isolation between them is enough low.
This Bluetooth function mobile phone 110d comprises two transmission power level.For example, this mobile phone 110d can be used as 1 class power stage terminal equipment running, with the maximum transmission power of residential gateway 124 communications be 20dBm.In another example, this mobile phone 110d can be used as 2 class power stage terminal equipments runnings, with the maximum transmission power of bluetooth earphone 122 communications be 4dBm.Bluetooth earphone 122 comprises suitable hardware, logical circuit, circuitry and/or the coding that can be used to receive and/or send audio signal.For example, bluetooth earphone 122 can be used to receive and/or send the sound of modulating from the Continuously Variable Slope increment (CVSD) of mobile phone 110d, or receives A2DP from mobile phone 110d, as MP3.Residential gateway 124 comprises suitable hardware, logical circuit, circuitry and/or the coding that can be used to receive and/or transmit data and/or audio signal.For example, residential gateway 124 can receive and/or transmit the sound of the CVSD modulation of 64kb/s.
In running, mobile phone 110d can receive sound or audio content from the WLAN basic network by AP112c, and sound or audio content are passed to bluetooth earphone 122 or sound-content is passed to residential gateway 124.Similarly, bluetooth earphone 122 and residential gateway can be passed to sound-content Bluetooth function mobile phone 110d, and Bluetooth function mobile phone 110d can pass to voice signal other user successively by the WLAN basic network.
A Bluetooth function station, the Bluetooth function cell phone 110d shown in Fig. 1 C can support a plurality of bluetooth packet communications.For example, a Bluetooth function station can be supported to connect synchronously guiding (SCO) logic and transmit grouping, divides into groups as HV3.
Fig. 2 A is that in the one embodiment of the invention is typical in the BT HV3 frame of TX_BT signal and the communication sequential chart of WLAN transmission.With reference to figure 2A, the Bluetooth radio in the Bluetooth function station can be used to transmit bluetooth (BT) HV3 grouping.BT HV3 grouping is generally used for the voice transfer of 64kb/s but is not subject to this.BT HV3 grouping can comprise that 30 information bytes, payload length are 240 and do not have payload header to occur.This byte can not be subjected to forward error correction (FEC) protection, and Cyclic Redundancy Check can not occur.Because do not support BT HV3 packet retransmission, when a BT HV3 grouping was not received, total delivery quality will reduce, because the information that comprises in the BT HV3 that the loses grouping can be not retransmitted.As a result, BT HV3 meeting in group requires higher transmission priority, to avoid and the interference of WLAN between transmitting.
With reference to figure 2A, wherein show BT HV3 from a coexistence station or the terminal equipment typical sequential of carrying out communication.The transmission that a pair of BT HV3 is grouped between a station or terminal equipment and the peripheral unit is regarded as a BT HV3 frame.Grouping 202 can be passed to peripheral unit by slave station in time slot f (k), grouping 204 can be passed to the station from peripheral unit in time slot f (k+1).A time slot duration in the bluetooth communication is 625 μ s, in the frequency hopping order of AFH (AFH), and the corresponding different frequency of each time slot.The duration of a BTHV3 frame is 1.25ms.Transmit BT HV3 from the coexistence terminal and be grouped in per the 6th time slot or per the 3rd BT HV3 frame generation.For example, first grouping can be in the transmission of time slot f (k) slave station, and the next one is grouped in the transmission of time slot f (k+6) slave station.Similarly, stand and to receive first grouping at time slot f (k+1), in time slot f (k+7), receive next grouping.As a result, in the time period of two BTHV3 frames that a 2.5msWLAN pass-through box is provided, Bluetooth transmission can not take place.
As can be seen from the figure, TX_BT signal 206 is affirmed in time slot f (k) and f (k+1) and in time slot f (k+6) and the f (k+7), provides preferential transmission to cross the WLAN transmission to BT HV3 grouping.Certainly TX_BT signal 206 can make the WLAN transmission in the interior WLAN wireless device in coexistence station lose efficacy.WLAN transmission window 208 shows the time period of affirming between the TX_BT signal 206 when the WLAN wireless device can transmit the WLAN grouping.In this embodiment, the WLAN wireless device can transmit the WLAN grouping in to f (k+5) and time slot f (k+8) to f (k+11) at time slot f (k+2).
Fig. 2 B is the sure routine sequential chart of a typical TX_BT signal in the one embodiment of the invention.With reference to figure 2B, wherein show BT HV3 frame 210, the one TX_BT signals 212, and the 2nd TX_BT signal 214.The one TX_BT signal 212 can be had precedence over the starting point of BT HV3 frame 210 certainly, provides the time to finish or stops the current WLAN grouping with firmware in the WLAN wireless device at coexistence station and/or hardware and transmit.First TX_BT signal 212 can be affirmed in a guard time.This guard time can change only having precedence between BT HV3 frame 210 starting points 200 μ s to the 250 μ s.
In this respect, firmware in the WLAN wireless device and/or hardware can produce and/or store about finishing or stop the information of current WLAN packet delivery.After a TX_BT signal 212 was denied, the WLAN wireless device can utilize generation and/or canned data to restart the WLAN packet communications.
In another embodiment of operation certainly, the 2nd TX_BT signal 214, is transmitted with the current WLAN grouping that stops WLAN wireless device in the coexistence station for just having precedence over the starting point of BT HV3 frame 210 by certainly.When pin place that the 2nd TX_BT signal 214 is being closed the power amplifier that is used for supporting the WLAN packet delivery in the WLAN wireless device by certainly the time, can utilize this method.At this moment, firmware and/or the hardware in the WLAN wireless device can produce and/or store about stopping the information of current WLAN data packet delivery.After the 2nd TX_BT signal 214 was denied, this WLAN wireless device 204 can utilize generation and/or canned data to restart the WLAN packet communications.
Fig. 3 A is the WLAN/ bluetooth cooperation wireless device architectural block diagram that has two duplexers that are provided with by the WLAN wireless device among the typical case in the one embodiment of the invention.With reference to figure 3A, WLAN/ bluetooth cooperation wireless device architecture 300 comprises single antenna 302, band pass filter 304, first duplexer (SW1), 308, the second duplexers (SW2) 306, WLAN wireless device 310, Bluetooth radio 312, and power amplifier (PA) 316.Comprise antenna controller 314 in the WLAN wireless device 310.
Comprise the suitable hardware that can be used to transmit and receive bluetooth and WLAN communication in the single antenna 302.Wherein, single antenna 302 is applicable to the transmission and the reception of a plurality of communications protocol.Band pass filter 304 comprises appropriate hardware, logical circuit and/or the circuitry that can be used to carry out to the logical leggy filtration of band of communication signal.Band pass filter 304 can be arranged to follow the logical requirement of band of ISM band.
Wherein, SW1 308 and SW2 306 comprise suitable hardware, logical circuit and/or the circuitry that can be used to select from the signal of two input ports and be connected to an output port.SW1 308 and SW2 306 can utilize single-pole double throw (SPDT) switching device to realize.The selection operation of SW1 308 can be controlled by control signal, as WLAN Communication Control (TX_CTL) signal that is produced by antenna controller 314.The selection operation of SW2 306 can be controlled by control signal, as coexistence control (COEX_CTL) signal that is produced by antenna controller 314.
Comprise the suitable logical circuit, circuitry and/or the coding that can be used to handle the communication of WLAN protocol packet in the WLAN wireless device 310.Antenna controller 314 in the WLAN wireless device 310 can comprise suitable logical circuit, circuitry and/or coding, they can be used to generate TX_CTL and/or COEX_CTL control signal at least, receive and/or transmit WLAN and/or BT data so that the station to be set.As can be seen from the figure, WLAN wireless device 310 comprises the port that separates that is used for transmitting (TX) and reception (RX) WLAN packet traffic.But also available single TX/RX port carries out the WLAN communication.WLAN wireless device 310 can be used to generate WLAN transmission (TX_WLAN) signal and affirm the TX_WLAN signal in the WLAN communication process.WLAN wireless device 310 also can be used to receive preferential (TX_BT) signal of bluetooth from Bluetooth radio 312.When Bluetooth radio 312 certainly during the TX_BT signal, can lose efficacy from the WLAN traffic transport of WLAN wireless device 310.Thereby needn't use registration or interfere driving mechanism.In this, make the bang path in the WLAN wireless device 310 lose efficacy and to realize by using normal operations I/O (GPIO) pin.This method is similar to and makes the WLAN failure of apparatus aboard, allowing the passenger can guarantee that the wireless device in their mancarried device is closed, and can not interfere with aircraft system.When Bluetooth radio 312 is denied the TX_BT signal, can be activated from the WLAN pass traffic of WLAN wireless device 310.The firmware of running can be followed the tracks of flow status in the WLAN wireless device 310 when the WLAN communication failure, in case the WLAN communication is activated, can utilize communications status to carry out communication again.
In some cases, WLAN wireless device 310 or Bluetooth radio 312 lost efficacy, and standing can not operate with coexistance model again.When WLAN wireless device 310 lost efficacy, SW1 308 and/or SW2306 utilized being provided with of acquiescence to support bluetooth communication.When Bluetooth radio 312 lost efficacy, SW1308 and/or SW2 306 utilized being provided with of acquiescence to support the WLAN communication.
When the TX_BT signal is affirmed, can be by finishing or terminate in the operation of the firmware execution that operates in the WLAN wireless device 310, or, WLAN wireless device 310 packet communications were lost efficacy by closing WLAN wireless device 310 inner or outside power amplifiers.When Bluetooth radio 312 was denied the TX_BT signal, the WLAN flow communication of being undertaken by WLAN wireless device 310 was activated.PA 316 comprises output WLAN logical circuit signal, suitable and/or the circuitry that can be used to amplify from WLAN wireless device 310.In some cases, PA 316 inefficacies can make the WLAN ability in the station lose efficacy.For example, when the TX_BT signal was affirmed, PA 316 lost efficacy.
In running, Bluetooth radio 312 checks that the state of TX_WLAN signal is to determine whether WLAN wireless device 310 is utilizing single antenna 302 to carry out the WLAN communication.When a BT HV3 frame was transmitted, Bluetooth radio 312 TX_BT signal certainly transmitted to have precedence over WLAN.Certainly the TX_BT signal causes the WLAN transfer capability to lose efficacy, and produces the signal that SW1 308 and SW2 306 are set, and makes single antenna 302 be connected to the TX/RX port of Bluetooth radio 302.In this, antenna controller 314 is provided with SW1 308 and SW2 306 respectively according to TX_BT signal generation TX_CTL and COEX_CTL signal.When SW2 306 provides enough isolation between WLAN wireless device 310 and Bluetooth radio 312, SW1 308 is set suitably isolation is improved.For example, in SW1308, select the RX port of WLAN wireless device 310 that the isolation between the wireless device is improved.Bluetooth radio 312 is denied the TX_BT signal when the BT data communication has been finished, and WLAN/ bluetooth cooperation wireless device architecture 300 is re-set as default setting, for example, and the WLAN data communication.
Fig. 3 B is the WLAN/ bluetooth cooperation wireless device architectural block diagram that in the one embodiment of the invention typically has two duplexers that are provided with by WLAN wireless device and separator.With reference to figure 3B, this WLAN/ bluetooth cooperation wireless device architecture 320 comprises single antenna 302, band pass filter 312, PA 316 and a separator 322.Comprise antenna controller 314 in this WLAN wireless device 310.
Cooperate with the WLAN/ bluetooth among Fig. 3 A difference of wireless device architecture 300 of this WLAN/ bluetooth cooperation wireless device architecture 320 is, Bluetooth radio 312 comprises transmission (TX) separately, that be used as bluetooth communication and receives (RX) port, and separator 318 is used for supporting that BT separately receives and transfer path.This separator 318 comprises that can be used to receive communication data with one is separated into suitable hardware, logical circuit and/or the circuitry that a BT receives data and WLAN reception data.
In running, Bluetooth radio 312 is checked the state of TX_WLAN signal, to determine whether WLAN wireless device 310 is utilizing single antenna 302 to carry out the WLAN communication.When BT HV3 frame was about to be received or transmits, Bluetooth radio 312 is the TX_BT signal certainly.Certainly the TX_BT signal can cause at least a portion of WLAN ability to communicate to lose efficacy, and SW1 308 and SW2 306 is set single antenna 302 is connected to TX or the RX port in the Bluetooth radio 312.Based on affirming the TX_BT signal, antenna controller 314 generation COEX_CTL and TX_CTL signal are to be provided with SW2 306 and SW1308 respectively.
When Bluetooth radio 312 transmits the BT data, for example, thereby SW1 308 can be provided with the input that the TX port of Bluetooth radio 312 is connected to SW2 306 by the TX_CTL signal, thereby SW2 306 can be connected to antenna 302 by the output port that the COEX_CTL signal is provided with SW1 208 simultaneously.When Bluetooth radio 302 received the BT data, for example, thereby SW2 306 was provided with by the COEX_CTL signal single antenna 302 is connected to separator 318, and separator 318 is connected to the RX port of Bluetooth radio 312 successively.When the BT data communication had been finished, Bluetooth radio 312 was denied the TX_BT signal, and WLAN/ bluetooth cooperation wireless device architecture 320 is re-set as default setting, for example, and the WLAN Data Receiving.
Fig. 3 C is the flow chart that in the one embodiment of the invention typically is provided with the WLAN/ bluetooth cooperation wireless device architecture among Fig. 3 A-3B.With reference to figure 3C, after the initial step 352, in step 354, Bluetooth radio 312 is the TX_BT signal certainly.In this, the TX-BT signal is affirmed or is had precedence over the transmission of BT HV3 frame by sure immediately in guard time.In step 356, transmit or close the transmittability inefficacy that PA 316 makes WLAN wireless device 310 by finishing or stopping WLAN grouping.
In step 258, antenna controller is that COEX_CTL and TX_CTL signal produce the appropriate signal value.In this, signal value depends on whether Bluetooth radio comprises TX and RX port separately, and whether has used the separator 322 shown in Fig. 3 B.In step 360, whether firmware in the WLAN wireless device 310 and/or hardware decision TX_BT are denied.When the TX_BT signal was not denied, the communication of BT HV3 frame was not finished, and flow table 350 rests on step 360.When the TX_BT signal is denied, the communication of BT HV3 frame is finished, and flow table 350 continues to step 362.
In step 362, after the BT HV3 frame communication in the step 360 was finished, antenna controller 314 was reset SW1 308 and/or SW2 306 so that WLAN to be provided communication.In this, antenna controller 314 utilizes with the WLAN communication that takes place as the result who affirms the TX_BT signal and finishes or stop corresponding stored information, to produce the desired value of COEX_CTL and TX_CTL signal.In step 364, the WLAN transmittability is activated in WLAN wireless device 312.In this, when the TX_BT signal is used to close PA 316, deny that the TX_BT signal can give the WLAN wireless device 312 transmittabilities.After step 364, flow table 350 proceeds to final step 366.
Fig. 4 is that in the one embodiment of the invention typically has first duplexer that is provided with by the WLAN wireless device and the WLAN/ bluetooth cooperation wireless device architectural block diagram of second duplexer that is provided with by Bluetooth radio.With reference to figure 4, this WLAN/ bluetooth cooperation wireless device architecture 400 comprises single antenna 302, band pass filter 304, first duplexer (SW1) 308, second duplexer (SW2) 306, WLAN wireless device 310, Bluetooth radio 312, power amplifier (PA) 316, transmission/reception (T/R) piece 402 and one or 404.Comprise antenna controller 314 in this WLAN wireless device 310.
Cooperate with the WLAN/ bluetooth among Fig. 3 A difference of wireless device architecture of this WLAN/ bluetooth cooperation wireless device architecture 400 is that Bluetooth radio 312 can be used to produce a signalization, and controls the setting of SW2 306 by a GPIO port.In addition, the TX_BT signal can be used to control the setting of SW2 306.This T/R piece 402 comprises that the TX/RX port that is used for handling in the Bluetooth radio 312 transmits or the hardware BT data, suitable, logical circuit and/or the circuitry from SW2 306 of reception.For example, this T/R piece 402 can be used to amplify the BT data to transmit and/or to filter the BT data that receive.
In running, Bluetooth radio 312 checks that the state of TX_WLAN signal is to determine whether WLAN wireless device 310 is utilizing single antenna 302 to carry out the WLAN communication.This Bluetooth radio 312 can be affirmed TX_BT signal and communication BT HV3 frame.Certainly the TX_BT signal can cause WLAN ability to communicate at least a portion to lose efficacy and SW1 308 is set and SW2 306 single antenna 302 is connected to the TX/RX port in the Bluetooth radio 312.The TX_BT signal is used for being provided with SW2 306 for the BT communication.For example, when TX_BT is affirmed, or the output of door 404 is also affirmed that SW2 306 is configured to by this T/R piece 402 single antenna 302 is connected to the TX/RX port of Bluetooth radio 312.This Bluetooth radio 312 is denied this TX_BT signal when this BT HV3 data communication has been finished, and this WLAN/ bluetooth cooperation wireless device architecture 400 is re-set as default setting, for example, and the WLAN Data Receiving.
In another embodiment of the present invention, when the BT data that will transmit had again transmittability, for example, when being affirmed from the TX_WLAN signal of WLAN wireless device 310, Bluetooth radio 312 was waited for or is delayed a period of time.When having delayed the BT packet of a maximum duration or maximum, this Bluetooth radio 312 affirms that the TX_BT signal is to be provided with SW1 308 and SW2 306.When this TX_WLAN signal by certainly, when the BT data were about to be transmitted except BT HV3 frame, these were connected to the signal of bluetooth to this Bluetooth radio 212 certainly.When this signal that is connected to bluetooth is affirmed, or the output of door 404 is also affirmed that SW2 306 is configured to by this T/R piece 402 single antenna 302 is connected to this TX/RX port.This Bluetooth radio 312 can deny that this is connected to the signal of bluetooth when the BT data communication has been finished, and this WLAN/ bluetooth cooperation wireless device architecture 400 is re-set as default setting, for example, and the WLAN Data Receiving.
Fig. 5 A is the WLAN/ bluetooth cooperation wireless device architectural block diagram that in the one embodiment of the invention typically has three duplexers that are provided with by the WLAN wireless device.With reference to figure 5A, this WLAN/ bluetooth cooperation wireless device architecture 500 comprises single antenna 302, band pass filter 304, SW1 306, SW2 308, third antenna switch (SW3) 502, WLAN wireless device 310, Bluetooth radio 312, PA316 and separator 322.This WLAN wireless device 310 comprises antenna controller 314.
Cooperate with the WLAN/ bluetooth among Fig. 3 B difference of wireless device structure 320 of this WLAN/ bluetooth cooperation wireless device architecture 500 is, when receiving WLAN and bluetooth communication simultaneously respectively, SW3 502 is used for bypass SW1 308 and separator 322.In this, the COEX_CTL signal of these antenna controller 314 generations also is used to control the operation of this SW3 502.When the WLAN communication activates when avoiding the loss of signal strength by separator 322, this separator 322 of bypass is activated.
Fig. 5 B is the flow chart that in the one embodiment of the invention typically is provided with the WLAN/ bluetooth cooperation wireless device architecture among Fig. 5 A.With reference to figure 5B, after the initial step 552, in step 554, Bluetooth radio 312 is the TX_BT signal certainly.In this, the TX-BT signal is affirmed or is had precedence over the transmission of BT HV3 frame by sure immediately in guard time.In step 556, for example, transmit or close the transmittability inefficacy that PA 316 makes WLAN wireless device 310 by finishing or stopping a WLAN packet.
In step 558, antenna controller is that COEX_CTL and TX_CTL signal produce the appropriate signal value.In this, the COEX_CTL signal comprises according to Bluetooth radio 312 whether receiving or transmit the signal that a BT HV3 divides into groups to be provided with SW2 306 and SW3 502 in BT HV3 frame.In step 560, firmware in the WLAN wireless device 310 and/or hardware confirm whether this TX_BT signal is denied.When this TX_BT signal was not denied as yet, the communication of BT HV3 frame was not finished, and flow table 550 rests on step 560.When this TX_BT signal had been denied, the communication of BT HV3 frame was finished, and flow table 550 is proceeded step 562.
In step 562, after the BT HV3 frame communication in the step 560 was finished, this antenna controller 314 was reset SW1 308, SW2 306 and/or SW3 502 to carry out the WLAN communication.In this, antenna controller 314 utilizes with the WLAN communication that takes place as the result who affirms the TX_BT signal and finishes or stop corresponding stored information, to produce the desired value of COEX_CTL and TX_CTL signal.When receiving the WLAN data, for example, SW3 502 is set to make this SW1 308 of WLAN data bypass.In step 564, the WLAN transmittability is activated in WLAN wireless device 312.In this, when the TX_BT signal is used to close PA 316, deny that the TX_BT signal can give the WLAN wireless device 312 transmittabilities.After step 564, flow table 550 proceeds to final step 566.
The invention provides the single antenna collaboration method between juxtaposed WLAN and Bluetooth radio, it occurs in by reparation and is used for wireless station IEEE802.11b/g and bluetooth communication, coexistence or loss in the terminal and has realized the quality and the higher flows that strengthen.
Therefore, the present invention can realize in the combination of hardware, software or hardware and software.The present invention can realize with a centralized fashion at least one computer system, or realize with distributed way in different elements spreads all over several inner computer systems that connect.Any computer system or miscellaneous equipment that can be used to carry out described method all is fit to.The combination of one typical hardware and software is the computer system that has on the ordinary meaning of computer program, and wherein when this computer program was loaded and carries out, its may command computer system made it carry out described method.
Also but in the embeddeding computer program product, wherein this computer program comprises the feature that all finish described method in the present invention, and can carry out these methods in being loaded in a computer system time.Computer program herein means that a command sequence can adopt any expression, any language, code or symbol make a system have information processing capability, carry out a certain function later on a certain specific function of direct execution or in one of following two kinds of processes or two processes: a) be converted to another kind of language, code or symbol; B) under different material forms, duplicate.
The front has been carried out concrete description with reference to embodiment to the present invention, but those skilled in the art are appreciated that it is that the present invention can not break away from the replacement that its scope is made various modifications or is equal to.In addition, can not depart from the scope of the present invention and make many modifications to adapt to a certain special case of the present invention or material.Therefore, the invention is not restricted to the content that certain embodiments discloses, and comprise that all fall into the embodiment in the claim scope.
Claims (10)
1, a kind of method that wireless telecommunications are provided is characterized in that, may further comprise the steps:
In the station of processing at least one bluetooth (BT) communications protocol and a wireless lan (wlan) communications protocol:
Affirm a bluetooth priority signal;
Described station is set makes it to provide bluetooth communication by the single antenna based on described bluetooth priority signal, described single antenna is used for bluetooth and WLAN communication; And
When described bluetooth priority signal is affirmed, transmit blue-teeth data by described single antenna.
2, method according to claim 1 is characterized in that, further comprises: when described communication is finished, deny described bluetooth priority signal.
3, method according to claim 2 is characterized in that, further comprises: when described bluetooth priority signal is denied, reset described station to carry out WLAN communication by described single antenna.
4, method according to claim 1 is characterized in that, further comprises: default to a setting that WLAN communication is provided.
5, a system that is used to provide wireless telecommunications is characterized in that, this system comprises:
A station of handling at least one bluetooth (BT) communications protocol and a wireless lan (wlan) communications protocol, wherein said station comprises:
A Bluetooth radio that produces the bluetooth priority signal;
At least a portion that described station is set, make it to provide by the single antenna based on generation bluetooth priority signal the WLAN radio equipment of bluetooth communication, wherein said single antenna is used for bluetooth and WLAN communication; And
When the bluetooth priority signal that is produced was affirmed, described Bluetooth radio was transmitted blue-teeth data by described single antenna.
6, system according to claim 5 is characterized in that, described Bluetooth radio can be denied the bluetooth priority signal of described generation.
7, system according to claim 6 is characterized in that, when described bluetooth priority signal was denied, described WLAN radio equipment was reset at least a portion at described station to provide WLAN communication by described single antenna.
8, system according to claim 5 is characterized in that, described station defaults to a setting that WLAN communication is provided.
9, a kind of method that wireless telecommunications are provided is characterized in that, may further comprise the steps:
In the station of at least one first communications protocol of processing and one second communications protocol;
Affirm one first communications protocol priority signal;
Described station is set makes it to provide the first communications protocol communication by the single antenna based on the described first communications protocol priority signal, wherein said single antenna is used for the first and second communications protocol communications; And
When the described first communications protocol priority signal is affirmed, transmit the first communications protocol data by described single antenna.
10, method according to claim 9 is characterized in that, further comprises: when described communication is finished, deny the described first communications protocol priority signal.
Applications Claiming Priority (3)
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| US60018404P | 2004-08-09 | 2004-08-09 | |
| US60/600,184 | 2004-08-09 | ||
| US11/143,378 | 2005-06-02 |
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| CN100364286C CN100364286C (en) | 2008-01-23 |
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| CNB2005100857720A Expired - Fee Related CN100364286C (en) | 2004-08-09 | 2005-08-08 | Method and system for sharing a single antenna in radio communication |
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