CN1764078A - Mobile communication terminal with GPS power supply management function - Google Patents
Mobile communication terminal with GPS power supply management function Download PDFInfo
- Publication number
- CN1764078A CN1764078A CNA2005100635903A CN200510063590A CN1764078A CN 1764078 A CN1764078 A CN 1764078A CN A2005100635903 A CNA2005100635903 A CN A2005100635903A CN 200510063590 A CN200510063590 A CN 200510063590A CN 1764078 A CN1764078 A CN 1764078A
- Authority
- CN
- China
- Prior art keywords
- control part
- digital signal
- signal processing
- processing portion
- master control
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
- G06Q20/00—Payment architectures, schemes or protocols
- G06Q20/30—Payment architectures, schemes or protocols characterised by the use of specific devices or networks
- G06Q20/34—Payment architectures, schemes or protocols characterised by the use of specific devices or networks using cards, e.g. integrated circuit [IC] cards or magnetic cards
- G06Q20/341—Active cards, i.e. cards including their own processing means, e.g. including an IC or chip
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
- G06F1/26—Power supply means, e.g. regulation thereof
- G06F1/32—Means for saving power
- G06F1/3203—Power management, i.e. event-based initiation of a power-saving mode
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/72—Mobile telephones; Cordless telephones, i.e. devices for establishing wireless links to base stations without route selection
- H04M1/725—Cordless telephones
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M2201/00—Electronic components, circuits, software, systems or apparatus used in telephone systems
- H04M2201/34—Microprocessors
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M2250/00—Details of telephonic subscriber devices
- H04M2250/10—Details of telephonic subscriber devices including a GPS signal receiver
Abstract
The invention discloses a mobile communication terminal with a GPS power supply management function, and a method thereof, in which an oscillation unit supplies a clock pulse desired for operation; a low noise amplifier amplifies a GPS satellite signal; a RF singal processing unit amplifies a RF signal to a determined level and performs down conversion, a GPS signal carried on a weak reflection wave is converted into a strong analog signal and then converted into a digital signal, the signal is transmitted to a digital signal processing unit, the method is characterised in that, the digital signal processing unit transfers a power management command to a main controller through a UART; the main controller receives the UART power management command from the digital signal processing unit and directly controls a power controller; the power controller control output power by performing ON/OFF control on a corresponding LDO based on control of the main controller through an I2C bus. Because the I2C bus is used between the main controller and the power controller, usage of a GPIO need not to increase, and a switch transistor need not to use, thereby reducing components, having a simple structure and reducing material expense.
Description
Technical field
The present invention relates to have the mobile communication terminal of GPS function, especially relate to mobile communication terminal with GPS power management function and method thereof that power management is carried out in a kind of output of directly controlling power control part by master control part.
Background technology
Recently, carry GPS (Global Positioning System-global positioning system) function on the mobile communication terminal, provide all places information service to the user.
As everyone knows, GPS is artificial satellite and the Ground Control/monitoring system that the U.S. utilizes the artificial satellite trace location, and it is covering the whole world with 24 satellites.Gps satellite is a kind of low-orbit satellite that is positioned at about 20,000 Km high-altitudes, and it is not static satellite, and its period of revolution is about 12 hours.It is former to be used in military affairs, but allows commonly usedization of certain fields now.Each gps satellite is to load and numbering, position, the complete signal of oneself, the 50bps navigation data of communication environments associated electrical absciss layer information, to be diffused into 1.023Mhz PN sign indicating number, to transmit earthward in 24 hours with the 1575.42Mhz centre frequency.
GPS control station and monitoring station operation gps satellite, thus and latest data is uploaded to satellite upgrade satellite-signal.There are 5 monitoring stations (Monitor Station) and 1 master station (Master ControlStation) in the whole world.
Gps receiver receives the signal that gps satellite transmitted, calculate the pseudo-distance (Pseudo-Range) of each satellite according to the result who is received to the receiver antenna, if the pseudorange that calculated is 3 when above, utilization principle of triangulation, the position of calculating the receiver antenna.The coordinate that is calculated is ECEF (Earth-Centered Earth-Fixed-the earth's core earth an is connected) coordinate, after it converts the Global coordinate that uses among the GPS to and is WCS84 (world coordinate system 84) coordinate, be converted to the vector or the TM coordinate that use in Korea S, and search for map datum.
Fig. 1 is the structured flowchart with mobile communication terminal of existing GPS power management function.
As shown in the figure, mobile communication terminal with GPS function, it is characterized in that, by power control part (PMIC:Power Management Integrated Circuit) 10, switching transistor 11/12, low noise amplifier (LNA:Low Noise Amplifier) 14; RF (radiofrequency-radio frequency) signal processing part 15; Data-signal handling part (DSP:Digital SignalProcessing) 16 and oscillating portion (TCXO:temperature compensated crystaloscillator-temperature compensating crystal oscillator) 13 formed.
Wherein, the power supply of 16 pairs of low noise amplifiers 14 of above-mentioned Digital Signal Processing portion, RF signal processing part 15, oscillating portion 13 is controlled.
Low noise amplifier 14 amplifies the low noise index of gps satellite signal with not enough 1.5bB.General amplification range plays the effect that reduces stacked (Cascade) noise figure and improve the C/N (Carrier to Noise Ratio-carrier-to-noise ratio) of gps satellite signal between 13～20dB.
RF signal processing part 15 comprises GPS RF LNA, frequency mixer (Mixer) and ADC (Analog DigitalConverter-analog-digital converter).In order to carry out digital translation (DigitalConversion) in ADC, LNA and frequency mixer are enlarged into enough strong level of signal with weak RF signal, and carry out down converted (Frequency Down Conversion) by frequency mixer.The result will be carried gps signal on faint reflected wave and be converted strong analog signal to and be input to ADC.ADC converts input signal digital signal to and sends it to Digital Signal Processing portion 16.
Digital Signal Processing portion 16 receives from the digital signal of RF signal processing part 15 inputs, and it is concerned processing (Dump ﹠amp; Correlation), carry out password locking (Code lock), measure the code phase (Code phase) of gps signal then, calculate the pseudo-range measurements (Pseudo-Range) of satellite with Digital Signal Processing portion 16 inner (C/A) sign indicating number of slightly catching that takes place.And, from gps signal navigation message (Navigation Data message) is deciphered (Decoding), the position way of output according to the rules that calculates receiver outputs to UART (Universal Asynchronous Receiver Transmitter-UART Universal Asynchronous Receiver Transmitter) or data/address bus (Data Bus).
Oscillating portion 13 provides Digital Signal Processing portion 16 required 19.2Mhz clock pulse when sleep state (SLEEP) enters into normal operating condition (Normal Operating) to Digital Signal Processing portion.This clock pulse frequency is according to the difference of hardware configuration (Hardware configuration) and can change.
Master control part (Cell phone modem-mobile phone modulator-demodulator or MSM:Mobile StationModem-mobile communication modulator-demodulator) 17 receives the position of the receiver that sends from Digital Signal Processing portion 16 and the application program that GPS information uses the user with the central processing unit of terminal.And, control system operation mode and the power control part 10 relevant with GPS.
Power control part 10 is the power supply supply and the special-purpose IC of management that can receive the control signal of low pressure drop (LDO:Low Drop Out), and inside has a plurality of LDO.Accept the control of master control part 17 by the I2C bus.According to the control signal of master control part 17 outputs, power control part 10 inner specific LDO are carried out ON/OFF control, thus change supply voltage.
The I2C data/address bus is the series connection communication mode that communicates with data, clock pulse (clock) 2 lines, transmits the logical value that is input in the data during input clock pulse.Data-signal of dual-purpose sends or receives, and I2C equipment has intrinsic address, and therefore a plurality of I2C equipment can have an I2C bus.
The power management of above-mentioned Digital Signal Processing portion 16 is as follows: 16 output WAKEUP (waking up), the RFPWRUP (radio frequency startup) of Digital Signal Processing portion, LNA-EN (low noise amplifier enables) signal, switching transistor 11,12 is carried out ON/OFF control, thereby can respectively carry out ON/OFF control the power supply of data-signal handling part 16 self and RF signal processing part 15, low noise amplifier 14, oscillating portion 13.
Digital Signal Processing portion 16 receives the required data of reception of gps signal by UART, and the result is sent to master control part 17, and voluntarily gps system is carried out power management.
But, the mobile communication terminal that has existing GPS power management function as mentioned above, Digital Signal Processing portion is responsible for power management, thereby master control part need not to carry out power management again, carry out power management in Digital Signal Processing portion by output GPIO (the general input and output of general purpose input/output-) on the contrary, so need to arrange circuit, and be not suitable for control when input of power control because of the GPIO value of being exported, need use switching transistor in addition, thereby bring multiple inconvenience.
Summary of the invention
Therefore, technical problem to be solved by this invention is to provide a kind of mobile communication terminal and method thereof with gps system power management, its in Digital Signal Processing portion by UART to the required power control signal of master control part request, master control part is directly controlled the output of power control part and is carried out the power management of gps system.
For achieving the above object, the mobile communication terminal with GPS power management function provided by the invention, the clock pulse that oscillating portion supply operation is required; Low noise amplifier amplifies gps satellite signal; The RF signal processing part zooms into the RF signal regulation grade and carries out down converted, thereby will carry gps signal on faint reflected wave and be converted to digital signal again after converting strong analog signal to, and send it to Digital Signal Processing portion, it is characterized in that: possess Digital Signal Processing portion, master control part and power control part.Digital Signal Processing portion is sent to master control part by UART with power management command; Master control part is directly controlled power control part after above-mentioned Digital Signal Processing portion receives the UART power management command; Thereby power control part is according to the control connection of passing through the I2C bus of above-mentioned master control part or disconnect the output control out-put supply of corresponding LDO.
Wherein, above-mentioned Digital Signal Processing portion exports each situation of WAKEUP or RFPWRUP signal as required, selectively transmits WAKEUP RequestUART order and RFPWRUP Request UART orders by UART to above-mentioned master control part.
And, the 6PS method for managing power supply of mobile communication terminal provided by the invention, the clock pulse that oscillating portion supply operation is required; Low noise amplifier amplifies gps satellite signal; The RF signal processing part zooms into the RF signal regulation grade and carries out down converted, thereby will carry gps signal on faint reflected wave and be converted to digital signal again after converting strong analog signal to, and send it to Digital Signal Processing portion, it is characterized in that: comprise that Digital Signal Processing portion is sent to power management command by UART the step of master control part; Master control part is received after the UART power management command that above-mentioned Digital Signal Processing portion transmits, and directly controls the step of power control part through the I2C bus; Thereby power control part is controlled the step of out-put supply to relevant LDO output carrying out ON/OFF by the control of I2C bus according to master control part.
Wherein, comprise that also above-mentioned Digital Signal Processing portion exports each situation of WAKEUP or RFPWRUP signal as required, selectively transmit the step that WAKEUP RequestUART order and RFPWRUP Request UART order to above-mentioned master control part by UART.
Adopt mobile communication terminal and the method thereof with GPS power management function of the present invention, Digital Signal Processing portion controls to the required power supply of master control part request by UART, master control part is directly controlled the output of power control part, and the existing I2C bus of use between master control part and the power control part, so need not to increase GPIO and switching transistor, thereby reduce the use of parts, have and make its features simple structure, reduce the effect of Master Cost.
Description of drawings
Fig. 1 is the structured flowchart with mobile communication terminal of existing GPS power management function;
Fig. 2 is the structured flowchart with mobile communication terminal of GPS power management function of the present invention.
Wherein, Reference numeral:
20: power control part 21: oscillating portion
22: low noise amplifier 23:RF signal processing part
24: Digital Signal Processing portion 25: master control part
Embodiment
Below in conjunction with accompanying drawing embodiments of the invention are elaborated.
Fig. 2 is the structured flowchart with mobile communication terminal of GPS power management function of the present invention.
As shown in the figure, the present invention is made up of power control part 20, oscillating portion 21, low noise amplifier 22, RF signal processing part 23, Digital Signal Processing portion 24 and master control part 25.
Wherein, oscillating portion 21 provides 24 operations of Digital Signal Processing portion required 19.2Mhz clock pulse (Clock); Low noise amplifier 22 amplifies gps satellite signal; RF signal processing part 23 zooms into the RF signal regulation grade and carries out down converted, converts to and converts digital signal again to after the strong analog signal and be sent to Digital Signal Processing portion 24 thereby will be carried in gps signal on the weak reflected wave.
Digital Signal Processing portion 24 is sent to master control part 25 by UART with power management command, but according to circumstances selectively transmits WAKEUP Request UART order and RFPWRUP Request UART order by UART to master control part 25.
Master control part 25 is directly controlled power control part 20 by the I2C bus after above-mentioned Digital Signal Processing portion 24 receives the UART power management command.
Power control part 20 is according to the control through the I2C bus of above-mentioned master control part 25, thereby out-put supply is controlled in control to relevant LDO output carrying out ON/OFF.
Effect of the present invention to said structure is described in detail below.
As shown in Figure 2, at first, needed 19.2Mhz clock pulse (Clock) when the WAKEUP that wakes up from sleep (SLEEP) state during oscillating portion 21 supply operation Digital Signal Processing portions 24 enters into usual operation state (Normal Operating).
Low noise amplifier 22 amplifies gps satellite signal with the noise figure of not enough 1.5dB.General amplification scope plays the effect that reduces stacked (Cascade) noise figure and improve the C/N (Carrier to Noise Ratio) of gps satellite signal at 13～20dB.
RF signal processing part 23 is enlarged into the RF signal regulation grade and carries out down converted, converts to and changes digital signal again into after the strong analog signal and be sent to Digital Signal Processing portion 24 thereby will be carried in gps signal on the weak reflected wave.
For this reason, above-mentioned RF signal processing part 23 comprises common GPS RF LNA, frequency mixer (MIXER) and ADC (Analog Digital Conversion).In order to carry out digital translation (DigitalConversion) at ADC, at LNA and frequency mixer weak RF signal is enlarged into strong level of signal, and carries out frequency down (Frequency Down Conversion) at frequency mixer.The result will be carried in the strong analog signal that gps signal on the faint reflected wave of several GHZ converts several MHz to and be input to ADC.ADC converts input signal to digital signal and is sent to Digital Signal Processing portion 24.
Afterwards, Digital Signal Processing portion 24 transmits power management command by UART to master control part 25, and master control part 25 is directly controlled out-put supply by the I2C bus that links to each other with power control part 20 and carried out power management.
At this, in the power management control of above-mentioned control part 25, Digital Signal Processing portion 24 exports each situation of WAKEUP or RFPWRUP signal as required, by UART WAKEUP RequestUART order and RFPWRUP Request UART order is sent to master control part 25.
Master control part 25 is received after the above-mentioned UART order, and relevant LDO output the carrying out ON/OFF to power control part 20 controls by the I2C bus, thereby directly controls the out-put supply of power control part 20, carries out the power management of gps system.
As mentioned above, according to mobile communication terminal and the method thereof with GPS power management function of the present invention, Digital Signal Processing portion controls to the required power supply of master control part request by UART, master control part is directly controlled the output of power control part, and use existing I2C bus between master control part and the power control part, thus need not to increase GPIO and switching transistor, thus the use of parts reduced, have and make its features simple structure, the effect of minimizing Master Cost.
Certainly; the present invention also can have other various embodiments; under the situation that does not deviate from spirit of the present invention and essence thereof; those of ordinary skill in the art work as can make various corresponding changes and distortion according to the present invention, but these corresponding changes and distortion all should belong to the protection range of the appended claim of the present invention.
Claims (4)
1. mobile communication terminal with global positioning system power management function, the clock pulse that oscillating portion supply operation is required; Low noise amplifier amplifies the GPS satellite signal; The radiofrequency signal handling part zooms into radiofrequency signal the regulation grade and carries out down converted, be converted to digital signal with carrying global positioning system signal on faint reflected wave again after converting strong analog signal to, and send it to Digital Signal Processing portion, it is characterized in that: comprise Digital Signal Processing portion, master control part and power control part, Digital Signal Processing portion is sent to master control part by UART Universal Asynchronous Receiver Transmitter with power management command; Master control part is directly controlled power control part after described Digital Signal Processing portion receives the UART Universal Asynchronous Receiver Transmitter power management command; Power control part is according to the control connection of passing through the I2C bus of described master control part or disconnect the output of corresponding low pressure drop, the control out-put supply.
2. the mobile communication terminal with global positioning system power management function according to claim 1, it is characterized in that: described Digital Signal Processing portion exports each situation of WAKEUP or RFPWRUP signal as required, selectively transmits WAKEUP RequestUART order and RFPWRUP Request UART orders by UART Universal Asynchronous Receiver Transmitter to described master control part.
3. the global positioning system method for managing power supply of a mobile communication terminal, the clock pulse that oscillating portion supply operation is required; Low noise amplifier amplifies the GPS satellite signal; The radiofrequency signal handling part zooms into radiofrequency signal the regulation grade and carries out down converted, be converted to digital signal with carrying global positioning system signal on faint reflected wave again after converting strong analog signal to, and send it to Digital Signal Processing portion, it is characterized in that: comprising: Digital Signal Processing portion is sent to power management command by UART Universal Asynchronous Receiver Transmitter the step of master control part; Master control part is received after the UART Universal Asynchronous Receiver Transmitter power management command that described Digital Signal Processing portion transmits, and directly controls the step of power control part through the I2C bus; Power control part connects relevant low pressure drop output according to the control of master control part by the I2C bus or disconnects control, controls the step of out-put supply.
4. the global positioning system method for managing power supply of mobile communication terminal according to claim 3, it is characterized in that: comprise that also described Digital Signal Processing portion exports each situation of WAKEUP or RFPWRUP signal as required, selectively transmit the step that WAKEUPRequest UART order and RFPWRUP Request UART order to described master control part by UART Universal Asynchronous Receiver Transmitter.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020040085049A KR100655972B1 (en) | 2004-10-22 | 2004-10-22 | Mobile station having GPS power management function and Method thereof |
| KR1020040085049 | 2004-10-22 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1764078A true CN1764078A (en) | 2006-04-26 |
Family
ID=36748056
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2005100635903A Pending CN1764078A (en) | 2004-10-22 | 2005-04-13 | Mobile communication terminal with GPS power supply management function |
Country Status (2)
| Country | Link |
|---|---|
| KR (1) | KR100655972B1 (en) |
| CN (1) | CN1764078A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101867175A (en) * | 2010-04-23 | 2010-10-20 | 福建新大陆通信科技股份有限公司 | Shutdown circuit of GPS vehicle-mounted position system with function of remote multi-domain automatic shutdown |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100828159B1 (en) * | 2006-12-30 | 2008-05-07 | (주)네비우스 | Gps terminal and method for saving sources of electricity |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1195441A (en) * | 1996-04-12 | 1998-10-07 | 龙忠光 | Communication device and communication method |
| KR19990003371A (en) * | 1997-06-25 | 1999-01-15 | 김영환 | Power control device of satellite broadcasting receiver |
| JP3600564B2 (en) * | 2001-09-11 | 2004-12-15 | 株式会社東芝 | Portable information device having a plurality of wireless units |
| KR20040105835A (en) * | 2002-04-03 | 2004-12-16 | 톰슨 라이센싱 에스.에이. | Power supply for a satellite receiver |
-
2004
- 2004-10-22 KR KR1020040085049A patent/KR100655972B1/en not_active IP Right Cessation
-
2005
- 2005-04-13 CN CNA2005100635903A patent/CN1764078A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101867175A (en) * | 2010-04-23 | 2010-10-20 | 福建新大陆通信科技股份有限公司 | Shutdown circuit of GPS vehicle-mounted position system with function of remote multi-domain automatic shutdown |
| CN101867175B (en) * | 2010-04-23 | 2012-10-03 | 福建新大陆通信科技股份有限公司 | Shutdown circuit of GPS vehicle-mounted position system with function of remote multi-domain automatic shutdown |
Also Published As
| Publication number | Publication date |
|---|---|
| KR20060035519A (en) | 2006-04-26 |
| KR100655972B1 (en) | 2006-12-11 |
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