CN102223190B - Communicator and the identification method identifying package - Google Patents
Communicator and the identification method identifying package Download PDFInfo
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- CN102223190B CN102223190B CN201110086098.3A CN201110086098A CN102223190B CN 102223190 B CN102223190 B CN 102223190B CN 201110086098 A CN201110086098 A CN 201110086098A CN 102223190 B CN102223190 B CN 102223190B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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Abstract
A kind of communicator and the identification method identifying package.Communicator comprises: radio-frequency module, is used for receiving radiofrequency signal；Down-converter, it is coupled to radio-frequency module, for responsive channels selection signal, lower converting radio-frequency signals is to produce conversion signal, and wherein channel selecting signal control down-converter is alternately to scan multiple scan chain during scanning frame, and each in multiple scan chain comprises multiple channel；And detector, it is coupled to down-converter, for whether comprising identification package according to conversion signal deciding radiofrequency signal, wherein conversion signal is corresponding to multiple channels of multiple scan chains.Described communicator and the identification method identifying package, by performing heuristic scanner, can perform calling scanning or demand scan quickly, thus reduce power consumption.
Description
Technical field
The present invention is related to communicator, and is contained in radio frequency (radio particularly with regard to for identification
Frequency, hereinafter referred to as RF) and identification in signal (identification, hereinafter referred to as
For ID) communicator of package and method.
Background technology
Blue tooth wireless technology is Small Extension Node. Communications technology, its alternative wire cable connect mobile and/
Or fixed communication apparatus keep high level of security.Bluetooth technology be mainly characterized by robustness
(robustness), low-power and low cost.Bluetooth compliant define unified structure so that
A lot of equipment can be connected to and communicate with each other.
All bluetooth equipments are defaulted as standby.In standby, it is not connected with equipment periodic
Property ground monitoring information.Said procedure is referred to as scanning, and it can be divided into two kinds: calling scanning (page
Scan) with demand scan (inquiry scan).Calling scanning is defined as connexon state
(sub-state), wherein in above-mentioned sub-state, every 1.28 seconds of equipment is a scanning window phase
Between (11.25ms) (via " calling ") monitor oneself device access code (device access
Code, hereinafter referred to as DAC), to arrange actual connection between devices.Demand scan with
Calling scanning is similar, askes except receiving equipment (via " inquiry ") scanning in sub-state
Ask fetcher code (inquiry access code, IAC).Demand scan is used for finding which equipment
The address of the equipment in scope and in scope and clock.Therefore, generally at above-mentioned scanning window
During Kou, (11.25ms) performs plain scan program to bluetooth equipment.
Main bluetooth equipment uses calling to scan sub-state to activate and to connect from bluetooth equipment, wherein
Periodically wake up above-mentioned calling scans sub-state from bluetooth equipment.Main bluetooth equipment passes through
Repeatedly different frequency hopping channels send from the device access code of bluetooth equipment with attempt capture from
Bluetooth equipment.Scanning in sub-state in calling, main bluetooth equipment is rapidly, different jump a large amount of
Again and again send in rate corresponding to target from the device access code (ID package) of bluetooth equipment, with
Just connect.Because ID package is the shortest package, therefore Hopping frequencies can improve from 1600hops/s
To 3200hops/s.Because main bluetooth equipment may be the most synchronize with the bluetooth clock from bluetooth equipment,
In this case, main bluetooth equipment will be unable to accurately learn when wake up from bluetooth equipment and
It is positioned at which Hopping frequencies from bluetooth equipment.Therefore, main bluetooth equipment is sent out at different Hopping frequencies
Send a series of (train) identical DAC, and monitor until main bluetooth sets between interval sending
For receiving response from from bluetooth equipment.Fig. 1 is the sequential of calling scanning and demand scan transmission
Figure, wherein according to bluetooth compliant, multipair (pair) calling scanning or demand scan information 100
Repeat in scanning window (11.25ms).
But, when being in standby, because of calling scanning and demand scan, bluetooth equipment
By power consumption.When bluetooth equipment is not connected with, will consume a large amount of power of battery, this is can not
Take.
Accordingly, it would be desirable to the communicator of a kind of ID package being contained in radiofrequency signal for identification
With method, to reduce the power consumption of communicator being in standby.
Summary of the invention
The embodiment of the present invention provides a kind of communicator, and described communicator comprises: radio-frequency module,
For receiving radiofrequency signal；Down-converter, is coupled to radio-frequency module, selects for responsive channels
Signal and lower converting radio-frequency signals are to produce conversion signal, and wherein channel selecting signal controls lower turn
Parallel operation is every with alternately scan in multiple scan chain, and multiple scan chain during scanning frame
One comprises multiple channel；And detector, it is coupled to down-converter, for according to conversion letter
Number determining whether radiofrequency signal comprises identification package, wherein conversion signal is corresponding to multiple scan chains
Multiple channels.
The embodiment of the present invention separately provides a kind of identification method identifying package, is contained in for identification
Identification package in radiofrequency signal, the identification method of described identification package comprises: receive radio frequency letter
Number；With reference to channel selecting signal converting radio-frequency signals to produce conversion signal, wherein Channel assignment
Signal alternately scans multiple scan chain during scanning frame, each in plurality of scan chain
Individual comprise multiple channel；Conversion signal is performed scanning imaging system；And determine according to scanning result
Whether radiofrequency signal comprises identification package.
The embodiment of the present invention separately provides a kind of method recognizing bluetooth recognition package, and described identification is blue
The method of tooth identification package comprises: receive radiofrequency signal；With reference to channel selecting signal converting radio-frequency
Signal is to produce conversion signal, and wherein channel selecting signal scans N number of bluetooth during scanning frame
Frequency hopping channel, wherein 32≤N≤78；Conversion signal is performed scanning imaging system；And according to sweeping
Retouch result and determine whether radiofrequency signal comprises bluetooth recognition package.
Above-described communicator and the identification method identifying package, by performing quickly scanning
Program, can perform calling scanning or demand scan quickly, thus reduce power consumption.
Accompanying drawing explanation
Fig. 1 is the sequential chart of calling scanning and demand scan transmission.
Fig. 2 is showing of the communicator for recognizing ID package according to one embodiment of the invention
It is intended to.
Fig. 3 is the signal of the communicator shown in the Fig. 2 according to one embodiment of the invention
Sequential chart.
Fig. 4 is the power of the power detector shown in the Fig. 2 according to one embodiment of the invention
Detection signal SpowerThe schematic diagram of power distribution pattern.
Fig. 5 is the power of the power detector shown in the Fig. 2 according to another embodiment of the present invention
Detection signal SpowerThe schematic diagram of power distribution pattern.
Fig. 6 is the power of the power detector shown in the Fig. 2 according to another embodiment of the present invention
Detection signal SpowerThe schematic diagram of power distribution pattern.
Fig. 7 is the power of the power detector shown in the Fig. 2 according to another embodiment of the present invention
Detection signal SpowerThe schematic diagram of power distribution pattern.
Fig. 8 is the power of the power detector shown in the Fig. 2 according to another embodiment of the present invention
Detection signal SpowerThe schematic diagram of power distribution pattern.
Fig. 9 is the ID package identification method for communicator according to one embodiment of the invention
Schematic diagram.
Detailed description of the invention
Some vocabulary is employed to censure specific element in the middle of specification and claims.
Person of ordinary skill in the field is it is to be appreciated that hardware manufacturer may be with different nouns
Call same element.This specification and claims book is not using the difference of title as district
The mode of subelement, but using element difference functionally as the criterion distinguished.In explanation
" comprising " mentioned in book and claims is open term, therefore, should be construed to
" comprise but be not limited to ".Additionally, " coupling " word here comprise any directly and indirectly
Electrical connection.Therefore, if first device is coupled to the second device described in literary composition, then represent
First device can directly be electrically connected to the second device, or by between other device or connection means
Ground connection is connected electrically to the second device.
According to bluetooth compliant, when in calling scanning or demand scan, main equipment is exhaled at one
Call and send the frequency hop sequences comprising 32 frequencies.The bluetooth device address using calling unit is come
Calculate each in 32 frequencies.In order to solve an above-mentioned difficult problem, calling sequence comprises 32
Frequency, uses one to calculate main mid frequency and 31 other frequencies, other frequencies the most above-mentioned
Rate has the skew of +/-16.Within every 1.28 seconds, calculate once new mid frequency.For processing calling sequence
All 32 frequencies of row, calling frequency hop sequences is two callings comprising 16 frequencies respectively
Alternately switch between chain.Above-mentioned calling chain is referred to as A chain and B chain.When in calling scanning
Time, main equipment order sends 128 A chains.Then, if sending 128 A chains from equipment
After do not respond calling yet, then main equipment order sends 128 B chains.If sending 128 from equipment
Do not respond calling after secondary B chain yet, then main equipment sends A chain again.Aforesaid operations continues until
Respond main equipment from equipment, or main equipment is abandoned sending chain.
Fig. 2 is the communicator 200 for recognizing ID package according to one embodiment of the invention
Schematic diagram.Communicator 200 comprises RF module 210, down-converter 220, simulation to number
Word transducer (hereinafter referred to as ADC) 230, power detector 240 and channel selector
250.In fig. 2, RF module 210 receives RF signal via antenna 260.Then, under
Transducer 220 receives signal from RF module 210 and responds the letter from channel selector 250
Road selects signal Ssel, change signal S by being converted under reception signalBB(such as intermediate frequency
(intermediate frequency, IF) signal or base band (Baseband) signal).Channel
Selector 250 can select from 79 channels at least 32 channels as destination channel, and will
Above-mentioned at least 32 channels are divided into multiple scan chain (scan train), such as A chain and B chain.
Note that and select 32 destination channel to be only used for the example described, be not intended as the limit of the present invention
Fixed.For example, channel selector 250 can select N (32≤N≤78) from 79 channels
Individual channel, and the N number of channel selected is divided into more than two chain.Then, channel selector
250 can be that down-converter 220 provides channel selecting signal Ssel, exist controlling down-converter 220
One scanning frame (1250 μ s) cycle alternately scans (sweep) multiple scan chain.Therefore,
Channel generation conversion signal S corresponding to multiple scan chains that channel selector 250 arrangesBB。
Operation in detail will be described below.Then, ADC 230 will change signal SBBBe converted to number
Word signal SD.Then, power detector 240 can be to digital signal SDPerform the scanning of ID package
Program, to determine whether the RF signal that RF module 210 receives comprises bluetooth ID package.?
In one embodiment, power detector 240 detects digital signal SDPower with obtain power detect
Survey signal Spower.Then, power detector 240 can be according to the power detecting signal in scanning frame
SpowerPower distribution pattern determine whether RF signal comprises bluetooth ID package, and provides merit
Rate determination result SresultFor down-stream.For example, if detecting bluetooth ID package,
Then communicator 200 can decide whether to set with equity (peer) bluetooth sending bluetooth ID package
Standby foundation connects.It addition, ADC 230 can be omitted, and power detector 240 can be used for directly
Meet detecting conversion signal SBBPower, thus reduce the slewing distortion that caused by ADC 230 also
Obtain power detecting signal S exactlypower.In other words, power detecting can be in analog domain or numeral
Territory performs.
Fig. 3 is the letter of the communicator 200 shown in the Fig. 2 according to one embodiment of the invention
Number sequential chart.In figure 3, during signal S1 represents the RF signal that RF module 210 receives
ID package form (format), signal S2 represents the scanning mode of communicator 200, its
Represent the channel arrangement at each scanning frame period A chain Yu B chain, and signal S3 represents number
Word signal SDPower level.As bluetooth compliant defines, send calling or demand scan information
Reciprocity bluetooth equipment frequency hopping between 32 channels, and a pair calling or demand scan information
31 are present in first time period T1 and the second time period T1, and a pair calling or demand scan
Information 32 is present in the 5th time period T1 and the 6th time period T1.In one embodiment, bag
Information 31 containing an ID package is transmitted in a channel in A chain and comprises the 2nd ID
The information 32 of a package channel in B chain transmits；In another embodiment, comprise
The information 31 of the oneth ID package is transmitted in a channel in B chain and comprises the 2nd ID envelope
The information 32 of bag is transmitted in a channel in A chain.Please also refer to Fig. 2 and Fig. 3, under
Transducer 220 can be according to channel selecting signal SselScanning A chain and the channel of B chain, Qi Zhongxin
Road selects signal SselCorresponding to the channel arrangement of display in signal S2.In the above-described embodiments,
Scanning frame is divided into four time period T1, therefore the time span of scanning frame is equal to time period T1
Time span be multiplied by 4.Using scanning frame above as example, its comprise first time period T1,
Second time period T1, the 3rd time period T1, the 4th time period T1, and each time period T1
Time m-a length of 312.5 μ s.The sweep time of each scan chain (such as A chain and B chain)
Length is substantially equal to time period T1, and channel selecting signal S during time period T1sel
Control down-converter 220 further alternately to scan the multiple channels in scan chain.It addition,
Each time period T1 is divided into five time period T2；So, the time of each time period T2
-a length of 62.5 μ s.Therefore, communicator 200 can be by using down-converter 220 and channel
Selector 250 performs ID package scanning imaging system, to scan A chain during first time period T1
16 channels (such as from channel CH0 to channel CH15) five times, in the second time period
16 channels (such as from channel CH0 to channel CH15) of scanning B chain five times during T1,
16 channels of scanning A chain five times during the 3rd time period T1, at the 4th time period T1
16 channels of period scanning B chain five times.Meanwhile, power detector 240 is used for obtaining A
The power level of each channel in chain and B chain.So, no matter information 31 whether comprise right
Whether should comprise corresponding to B chain or A in A chain or an ID package of B chain and information 32
2nd ID package of chain, communicator 200 can successfully detect an ID package and the 2nd ID
Package, all (full) channels without scanning RF signal (the most do not scan all 79
Individual frequency hopping channel).For example, when comprising the information 31 of an ID package in first time period
In T1 and the second time period T1 during the transmission of the CH1 in A chain, corresponding in first time period
In T1, the power peak 33 of the CH1 in A chain can be detected by power detector 240, because of scanning
State (signal S2) is positioned in A chain during first time period T1, such as institute in signal S3
Show.In another example, when comprising the information 32 of the 2nd ID package at the 5th time period T1
And during the 6th transmission of the CH1 in B chain in time period T1, corresponding at the 6th time period T1
The power peak 34 of the CH1 in middle B chain can be detected by power detector 240, because of scanning shape
State (signal S2) is positioned in A chain, during the 6th time period T1 as shown in signal S3.
Power detector 240 can further to signal S3 sampling and by sampled value and threshold ratio relatively to obtain
Power detecting signal Spower.In the present embodiment, power detecting signal SpowerThere are 16
Position, each of which position representation signal S3 is at the power level of individual channel.For example, often
One bit with high logic level " 1 " shows the digital signal S corresponding to individual channelDMerit
Rate level has exceeded threshold value at independent second time period T2, and each has low logic level
The bit of " 0 " shows the digital signal S corresponding to individual channelDPower level independent second
Time period, T2 was not less than threshold value.So, communicator 200 can detect second, third and
Inactivity or low power level during 4th time period T1.Note that the scanning shown in Fig. 3
The time span of frame, time period T1 and time period T2 are only used for the example described, not
Restriction as the present invention.Additionally, A chain and B chain can comprise fewer of more than 16 channels,
And A chain can be different from the channel quantity of B chain.For example, A chain can tandem 15 letter
Road and B chain can 17 channels of tandem.In another example, A chain can 20 channels of tandem and
B chain can 20 channels of tandem.A chain can overlap or do not overlap with the channel of B chain.If definition
All can be comprised for the destination channel sending bluetooth ID package by bluetooth equipment at bluetooth compliant
Among scan chain, these amendments all belong in the scope of the present invention.That is, channel selector 250
Multiple scan chains in each comprise at least some of of destination channel.
Fig. 4 is the power detecting signal S according to one embodiment of the inventionpowerPower distribution
The schematic diagram of pattern 400.Please also refer to Fig. 2 and Fig. 4, in the present embodiment, by
Digital signal S is periodically detected during scanning frameDPower obtain power detecting signal
Spower.It is contained in power detecting signal SpowerIn power distribution pattern 400 there is multiple position,
Show the different channels digital signal S at different time points and scan chain respectivelyDPower position
Accurate.Additionally, the power distribution subpattern of such as P1, P2 or P3 shown in Fig. 4 comprises many
Individual show the digital signal S corresponding to multiple channels respectivelyDThe bit of power level.Citing and
Speech, the bit being positioned in first and second row (row) in power distribution subpattern P1 is respectively
Corresponding to channel CH0 and CH1 in A chain, and it is positioned in power distribution subpattern P2
Bit in first and second row corresponds respectively to channel CH0 and CH1 in B chain.Obtaining
After power distribution pattern 400, power detector 240 can perform by by power distribution pattern 400
With predetermined bluetooth ID model comparision with the heuristic scanner of identification id package.If power is distributed
Pattern 400 is decided to be the predetermined bluetooth ID pattern of coupling, then power detector 240 produces power
Determination result SresultTo show to detect bluetooth ID package.For example, in power distributed mode
In formula 400, the bit being only located at the second row in power distribution subpattern P3 is in high logical bit
Accurate " 1 " and other bits are all in low logic level " 0 ", and this shows to detect in A chain one
Power peak (power peak 33 of Fig. 3).So, power can be determined by power detector 240
Determine result SresultThere is provided to subsequent conditioning circuit to show that power distribution pattern 400 mates bluetooth ID mould
Formula (i.e. RF signal packet package Han bluetooth ID), for subsequent treatment.
Fig. 5 is the power detecting signal S according to another embodiment of the present inventionpowerPower distribution
The schematic diagram of pattern 500.Similarly, in Figure 5, by during scanning frame periodically
Detecting digital signal SDPower obtain power distribution pattern 500.Obtaining power distribution pattern
After 500, power detector 240 can provide power decision result SresultTo show power distributed mode
Whether formula 500 mates bluetooth ID pattern.Additionally, power detector 240 can provide power decision
Result SresultTo show whether power distribution pattern 500 mates noise/interference pattern.In this reality
Executing in example, power detector 240 can determine that power distribution pattern 500 does not mate any bluetooth ID
Pattern, and be noise/interference, because continuous power distribution is detected (in first time period
In T1, power distribution subpattern P4, P5, P6 and P7 have the ratio of high logic level " 1 "
Special).Then, power detector 240 provides power decision result SresultTo notify subsequent conditioning circuit.
But, if high power detected during several scanning frames continuously by communicator 200, then communicate
Device 200 can switch to plain scan program to further confirm that antenna from heuristic scanner
Whether the 260 RF signals received comprise any bluetooth package or noise.
Fig. 6 is the power detecting signal S according to another embodiment of the present inventionpowerPower distribution
The schematic diagram of pattern 600.Similarly, in figure 6, by during scanning frame periodically
Detecting digital signal SDPower obtain power distribution pattern 600.In the present embodiment, power
Detector 240 can determine that power distribution pattern 600 does not mate predetermined bluetooth ID package, because of for
(please note the purpose that foregoing description is merely to illustrate more than four time periods, chaotic power occurs
The quantity of time period be not limited to four) detect digital signal SDChaotic power.Citing and
Speech, each comprise at least one have high logic level " 1 " power distribution subpattern P8,
P9, P10 and P11 are dispersed in power distribution pattern 600.Comprise high logic level " 1 "
Power distribution subpattern P8, P9, P10 and P11 are comprised 16 positions by least one and have
The power distribution subpattern of low logic level " 0 " separates.For example, power distribution subpattern
P8 Yu P9 is comprised 16 positions by four and has the power distribution subpattern of low logic level " 0 "
Separate, and power distribution subpattern P9 with P 10 is comprised 16 positions by one and have low patrolling
The power distribution subpattern collecting level " 0 " separates.So, power detector 240 can provide power
Determination result SresultWith notice subsequent conditioning circuit detect four separate power distribution subpatterns and
Power distribution pattern 600 mates a kind of noise/interference pattern and not bluetooth ID pattern.But,
If communicator 200 is detected during several scanning frames continuously does not mate predetermined bluetooth ID package
Separation power distribution, then can perform plain scan program to further confirm that antenna 260 connects
Whether the RF signal received comprises any bluetooth package or noise.
Fig. 7 is the power detecting signal S according to another embodiment of the present inventionpowerPower distribution
The schematic diagram of mode 7 00.In the present embodiment, power detector 240 can determine that power is distributed
Mode 7 00 does not mate predetermined bluetooth ID package to be had too much because power distribution subpattern P12 comprises
The bit of high logic level " 1 " (i.e. multiple in single T2 time period, A period chain or B chain
The power level of channel has exceeded threshold value) and/or power distribution subpattern P13 comprise too many by extremely
The ratio of the separation with high logic level " 1 " that few one bit with low logic level " 0 " separates
Special (the power position of the channel of the multiple separation in single T2 time period, A period chain or B chain
Standard has exceeded threshold value).Here, suppose that the channel quantity in A chain/B chain is by its frequency categorization (sort)
To give " separation " substantive significance.So, power detector 240 can provide power decision result
SresultAt least one noise/interference pattern is mated and not blue with notice power distribution pattern 700
Tooth ID pattern.But, if communicator 200 during several scanning frames continuously in single merit
Rate distribution subpattern detects the bit too much with high logic level " 1 ", then can be at scanning window
Mouth (11.25ms) period is performed plain scan program to further confirm that by communicator 200
Whether the RF signal that antenna 260 receives comprises any bluetooth package or noise.
Fig. 8 is the power detecting signal S according to another embodiment of the present inventionpowerPower distribution
The schematic diagram of pattern 800.Each power in power distribution pattern 800 is distributed in subpattern,
There is not the bit with high logic level " 1 "；This means numeral during heuristic scanner
Signal SDPower have not exceeded threshold value.During several scanning frames, inactivity is detected this
Or in the case of low power level, can be in scanning window (11.25ms) period by communicator
Whether the RF signal that 200 execution plain scan programs receive to further confirm that antenna 260 comprises
Arbitrarily bluetooth package or noise.Communicator 200 can switch to commonly sweep from heuristic scanner
Program of retouching is to assist identification bluetooth ID package.
Fig. 9 is the ID package identification method for communicator according to one embodiment of the invention
Schematic diagram.First, via the RF module of antenna (the 260 of such as Fig. 2) Yu communicator
(the 210 of such as Fig. 2) receive RF signal (step S902).Then, in step S904
In, RF signal (is such as schemed with reference to channel selector by down-converter (the 220 of such as Fig. 2)
The 250 of 2) channel selecting signal be converted to change signal, wherein channel selecting signal is at one
Multiple scan chain (such as above-mentioned two scan chain A chain and B is alternately scanned during scanning frame
Chain), and each scan chain comprises multiple channel.In one embodiment, 16 of A chain
Channel (first time period T1) during the time period is alternately scanned, and the 16 of B chain
Individual channel (second time period T1) during subsequent period of time is alternately scanned.Then, exist
In step S906, to conversion signal perform scanning imaging system (heuristic scanner as escribed above or
Plain scan program) to obtain the power distribution pattern corresponding to conversion signal and corresponding to power
The power decision result of distribution pattern.Then, in step S908, according in step S906
The power decision result of middle acquisition performs down-stream.For example, if power decision result table
Bright power distribution pattern coupling bluetooth ID pattern (the 400 of such as Fig. 4), then communicator can
Determine that RF signal packet sends the bluetooth ID package to communicator containing by neighbouring bluetooth equipment.
So, communicator can set up the connection with bluetooth equipment.If power decision result shows power
Distribution pattern coupling noise/interference pattern (the 500 of such as Fig. 5, the 600 of Fig. 6), at power
Distribution pattern detects high power level or in power distribution pattern in (the 700 of such as Fig. 7)
Detect inactivity/low power level in (the 800 of such as Fig. 8), then communicator can continue
Periodically carry out heuristic scanner with monitoring corresponding to changing the power distribution pattern of signal.
Additionally, when the power decision result of heuristic scanner shows to be distributed for several scanning frame power
When pattern does not mate bluetooth ID pattern, communicator can stop performing heuristic scanner and then open
Begin to perform plain scan program, to assist RF signal to recognize bluetooth ID package.Therefore, pass through
Performing the heuristic scanner of the present invention, communicator can perform calling scanning or inquiry quickly
Scanning, thus reduce power consumption.Additionally, communicator does not scan all letters of RF signal
Road；The measurement time of the power detecting of every one scan channel can be extended.Therefore compatible in bluetooth
Network can obtain high detecting rate/sensitivity and low false alarm rate for calling and demand scan
(false alarm rate)。
Although the present invention is the most disclosed above, so it is not intended to limit this
Bright, any the technical staff in the technical field, without departing from the scope of the present invention, can
With do some change, therefore protection scope of the present invention should with claim defined in the range of
Accurate.
Claims (23)
1. a communicator, comprises:
Radio-frequency module, is used for receiving radiofrequency signal；
Down-converter, is coupled to this radio-frequency module, the lower conversion for responsive channels selection signal
This radiofrequency signal with produce conversion signal, wherein this channel selecting signal control this down-converter with
Each in multiple scan chain, and the plurality of scan chain is alternately scanned during scanning frame
Comprise multiple channel；And
Detector, is coupled to this down-converter, for believing according to this this radio frequency of conversion signal deciding
Number whether comprise identification package, wherein the plurality of corresponding to the plurality of scan chain of this conversion signal
Channel；
Wherein, the plurality of scan chain includes A chain and B chain；Include during described scanning frame:
First time period, the second time period, the 3rd time period and the 4th time period, described alternately sweep
Retouch multiple scan chain to include: scan each channel of described A chain in the period of described first time period,
Each channel of described B chain is scanned, in described 3rd time period in the period of described second time period
Period scan described A chain each channel, described 4th time period period scan described B
Each channel of chain.
2. communicator as claimed in claim 1, wherein, the sweep time of each scan chain
Length is substantially equal, and this channel selecting signal controls this down-converter further with at this
Multiple channels of this A chain are alternately scanned during first time period.
3. communicator as claimed in claim 2, wherein, the time span etc. of this scanning frame
Time span in this first time period is multiplied by 4.
4. communicator as claimed in claim 1, wherein, this channel selecting signal controls should
Down-converter does not scan all channels of this radiofrequency signal.
5. communicator as claimed in claim 4, wherein, implements this communicator to determine
Whether this radiofrequency signal comprises bluetooth recognition package, and the total channel quantity of the plurality of scan chain
For N, wherein 32≤N≤78.
6. communicator as claimed in claim 4, wherein, implements this communicator to determine
Whether this radiofrequency signal comprises bluetooth recognition package, and the plurality of scan chain comprises and is defined on indigo plant
Spendable 32 destination channel of this bluetooth recognition package in tooth specification, and the plurality of scan chain
In each comprise in these 32 destination channel at least some of.
7. communicator as claimed in claim 1, wherein, this detector is detected corresponding to this
The power level of this conversion signal of the plurality of channel of multiple scan chains is to produce power detecting letter
Number, and whether this detector comprise this knowledge according to this this radiofrequency signal of power detecting signal deciding
Other package.
8. communicator as claimed in claim 7, wherein, this power detecting signal packet contains merit
Rate distribution pattern, wherein this power distribution pattern comprises and shows to correspond respectively to the plurality of channel
Multiple bits of the power level of this conversion signal.
9. communicator as claimed in claim 7, wherein, this power detecting signal packet contains merit
Rate distribution pattern, wherein this power distribution pattern comprise show in multiple different time points the most right
Should be in multiple bits of the power level of this conversion signal of the plurality of channel.
10. communicator as claimed in claim 8 or 9, wherein, when this power distributed mode
When formula mates predetermined recognition mode, this detector determines that this radiofrequency signal comprises this identification package.
11. 1 kinds of identification methods identifying package, the knowledge being contained in radiofrequency signal for identification
Other package, comprises:
Receive radiofrequency signal；
This radiofrequency signal is changed to produce conversion signal, wherein this channel with reference to channel selecting signal
Selecting signal to be used for controlling multiple scan chain to be alternately scanned during scanning frame, wherein these are many
Each in individual scan chain comprises multiple channel；
This conversion signal is performed scanning imaging system；And
Determine whether this radiofrequency signal comprises identification package according to this scanning result；
Wherein, the plurality of scan chain includes A chain and B chain；Include during described scanning frame:
First time period, the second time period, the 3rd time period and the 4th time period, described control is multiple
Scan chain is alternately scanned during scanning frame to be included: control the phase in described first time period
Between each channel of described A chain be scanned, period described B chain each of described second time period
Channel is scanned, and each channel at the period described A chain of described 3rd time period is scanned,
Each channel of the period described B chain of described 4th time period is scanned.
12. identification methods identifying package as claimed in claim 11, wherein, for each
Length sweep time of scan chain is substantially equal, and this channel selecting signal is used for controlling
Multiple channels of this A chain are alternately scanned during this first time period.
13. identification methods identifying package as claimed in claim 12, wherein, this scanning frame
Time span be multiplied by 4 equal to the time span of this first time period.
14. identification methods identifying package as claimed in claim 11, wherein, this conversion walks
Suddenly it is not required to scan all channels of this radiofrequency signal.
15. identification methods identifying package as claimed in claim 14, wherein, implement the party
Method is to determine whether this radiofrequency signal comprises bluetooth recognition package, and the plurality of scan chain is total
Channel quantity is N, wherein 32≤N≤78.
16. identification methods identifying package as claimed in claim 14, wherein, implement the party
Method is to determine whether this radiofrequency signal comprises bluetooth recognition package, and the plurality of scan chain comprises
It is defined in bluetooth compliant spendable 32 destination channel of this bluetooth recognition package, and these are many
It is at least some of that each in individual scan chain comprises in these 32 destination channel.
17. identification methods identifying package as claimed in claim 11, wherein, this execution should
The step of scanning imaging system comprises:
Detect the power level of this conversion signal of the plurality of channel corresponding to the plurality of scan chain
To produce power detecting signal；And
This deciding step comprises:
This identification package whether is comprised according to this this radiofrequency signal of power detecting signal deciding.
18. identification methods identifying package as claimed in claim 17, wherein, this power is detectd
Surveying signal packet distribution pattern Han power, wherein this power distribution pattern comprises and shows to correspond respectively to
Multiple bits of the power level of this conversion signal of the plurality of channel.
19. identification methods identifying package as claimed in claim 17, wherein, this power is detectd
Surveying signal packet distribution pattern Han power, wherein this power distribution pattern comprises and shows in multiple differences
Time point corresponds respectively to multiple bits of the power level of this conversion signal of the plurality of channel.
20. identification methods identifying package as described in claim 18 or the 19th, wherein,
When this power distribution pattern mates predetermined recognition mode, determine that this radiofrequency signal comprises this identification
Package.
21. identification methods identifying package as described in claim 18 or 19, further include:
When this power distribution pattern show preset time section high power level or interference be detected
Time, perform plain scan program.
22. identification methods identifying package as described in claim 18 or 19, further include:
When this power distribution pattern show preset time section inactivity or low power level be detected
Then, plain scan program is performed.
23. 1 kinds of methods recognizing bluetooth recognition package, comprise:
Receive radiofrequency signal；
This radiofrequency signal is changed to produce conversion signal, wherein this channel with reference to channel selecting signal
Select signal to control down-converter during scanning frame, alternately scan multiple scan chain, the plurality of
The total channel quantity of scan chain is N, and the channel of the plurality of scan chain is Bluetooth hopping channels, its
In 32≤N≤78；
This conversion signal is performed scanning imaging system to produce scanning result；And
Determine whether this radiofrequency signal comprises bluetooth recognition package according to this scanning result；
Wherein, the plurality of scan chain includes A chain and B chain；Include during described scanning frame:
First time period, the second time period, the 3rd time period and the 4th time period, described alternately sweep
Retouch multiple scan chain to include: scan each channel of described A chain in the period of described first time period,
Each channel of described B chain is scanned, in described 3rd time period in the period of described second time period
Period scan described A chain each channel, described 4th time period period scan described B
Each channel of chain.
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| US13/007,789 US9001749B2 (en) | 2010-04-15 | 2011-01-17 | Communication apparatus and bluetooth ID packet recognition method thereof |
| US13/007,789 | 2011-01-17 |
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| US10863518B2 (en) * | 2017-11-22 | 2020-12-08 | Mediatek Inc. | Method for handling interference in Bluetooth device having other wireless technology |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006013310A1 (en) * | 2004-08-05 | 2006-02-09 | Nokia Corporation | Conditional scanning |
| US7184458B2 (en) * | 2001-02-20 | 2007-02-27 | Texas Instruments Incorporated | Reduced subset scan and dual frequency wakeup for bluetooth inquiry operation |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US20060128308A1 (en) * | 2004-12-10 | 2006-06-15 | Texas Instruments Incorporated | Low power bluetooth page and inquiry scan |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7184458B2 (en) * | 2001-02-20 | 2007-02-27 | Texas Instruments Incorporated | Reduced subset scan and dual frequency wakeup for bluetooth inquiry operation |
| WO2006013310A1 (en) * | 2004-08-05 | 2006-02-09 | Nokia Corporation | Conditional scanning |
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