CN101446630A - Electronic device with electricity-saving function and operation method thereof - Google Patents
Electronic device with electricity-saving function and operation method thereof Download PDFInfo
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- CN101446630A CN101446630A CNA2008100808431A CN200810080843A CN101446630A CN 101446630 A CN101446630 A CN 101446630A CN A2008100808431 A CNA2008100808431 A CN A2008100808431A CN 200810080843 A CN200810080843 A CN 200810080843A CN 101446630 A CN101446630 A CN 101446630A
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Abstract
The present invention discloses an electronic device with electricity-saving function and an operation method thereof. The electronic device includes a global navigation satellite system (GNSS) receiver, for providing position information based on multiple satellite signals; and a control circuit, coupled to the GNSS receiver to determine a electricity-saving period of the GNSS receiver based on at least geo information, and to control the GNSS receiver running in a normal mode to enter an electricity-saving mode during the electricity-saving period; wherein comparing with the normal mode, the GNSS receiver has less electrical energy consumption in the electricity-saving mode. The electronic device and method of the invention is capable of reducing the electrical energy consumption of the electronic device, and prolonging the work time of the electronic device with navigation function.
Description
Technical field
The invention relates to a kind of electronic installation and method of operating thereof that can reduce power consumption, during power saving, enter electronic installation and the method for operating thereof that battery saving mode reduces power consumption by control Global Navigation Satellite System (GNSS) receiver especially in regard to a kind of.
Background technology
Usually, portable electron device utilizes cell apparatus as its main energy source.Therefore, because the finiteness of energy source capacity, power consumption fast more, electronic installation is also short more working time.With existing portable GNSS receiver is example, and it provides positional information to realize navigation feature according to the satellite-signal that receives after startup.Yet common portable GNSS receiver remains capacity operation and realizes its expection (intended) function (for example hygienic trace).
The power save scheme of many existing reduction GNSS receiver power consumptions is suggested.For example, a kind of existing scheme is with the conversion in normal mode (normal mode) and battery saving mode (powersaving mode) (being standby mode (standby mode) or sleep pattern (sleep mode)) of GNSS receiver.Therefore, how to determine that the time that the GNSS receiver enters battery saving mode becomes the big problem that the deviser faces.
Summary of the invention
In order to solve the technical matters of GNSS receiver power consumption in the prior art, the invention provides a kind of electronic installation and method thereof with electricity-saving function, can make the GNSS receiver during power saving, enter battery saving mode and reduce power consumption.
According to an aspect of of the present present invention, it provides a kind of electronic installation with electricity-saving function, and this electronic installation comprises: the GNSS receiver is used for providing positional information according to satellite-signal; And control circuit, be coupled to the GNSS receiver, during being used at least determining the power saving of GNSS receiver according to geography information, and the GNSS receiver that is controlled at operation under the normal mode enters battery saving mode during power saving; Wherein the GNSS receiver moves under battery saving mode with moving under normal mode and compares, and has power consumption still less.
According to the present invention on the other hand, it provides a kind of method of operating electronic devices, and electronic installation has the GNSS receiver, and this method comprises: utilize the GNSS receiver to provide positional information according to satellite-signal; At least during determining the power saving of GNSS receiver according to geography information; And the GNSS receiver that is controlled under the normal mode operation enters battery saving mode in during power saving; Wherein the GNSS receiver moves under battery saving mode with moving under normal mode and compares, and has power consumption still less.
Electronic installation provided by the invention and method thereof, during determining the power saving of GNSS receiver according to geography information at least, and control it and during power saving, enter battery saving mode, can reduce the power consumption of electronic installation, prolong the working time of electronic installation with navigation feature.
Description of drawings
Fig. 1 is the electronic installation block diagram with electricity-saving function according to first embodiment of the invention.
Fig. 2 is the electronic installation block diagram with electricity-saving function according to second embodiment of the invention.
Fig. 3 is for to control the synoptic diagram that GNSS receiver shown in Figure 2 alternately enters normal mode and battery saving mode according to the present invention.
Fig. 4 is for to control the method flow diagram that the GNSS receiver switches according to the present invention between normal mode and battery saving mode.
Fig. 5 is the continuity figure of Fig. 4.
Embodiment
In the middle of instructions and claims, used some vocabulary to censure specific assembly.The person with usual knowledge in their respective areas should understand, and same assembly may be called with different nouns by manufacturer.This specification and claims book is not used as distinguishing the mode of assembly with the difference of title, but the benchmark that is used as distinguishing with the difference of assembly on function.Be an open term mentioned " comprising " in the middle of instructions and claims in the whole text, so should be construed to " comprise but be not limited to ".In addition, " coupling " speech is to comprise any indirect means that are electrically connected that directly reach at this.Therefore, be coupled to second device, then represent first device can directly be electrically connected in second device, or be electrically connected to second device indirectly through other device or connection means if describe first device in the literary composition.
See also Fig. 1, Fig. 1 is 100 block diagrams of the electronic installation with electricity-saving function according to first embodiment of the invention.General, have electricity-saving function electronic installation hardware environment as shown in Figure 1.In the present embodiment, electronic installation 100 comprises, but is not limited to, Global Navigation Satellite System (GNSS) receiver 102 and control circuit 104.GNSS receiver 102 support at least at present available GNSS one of them, for example global position system GPS (Global Positioning System), Galileo system GLONASS and GLONASS (Global Navigation Satellite System) GLONASS.Behind the satellite-signal that GNSS receiver 102 receives from tracking satellite, according to the satellite-signal calculating location information that receives.Control circuit 104 can be used to determine when GNSS receiver 102 enters battery saving mode (being standby mode or sleep pattern).In the present embodiment, during control circuit 104 is determined power saving according to geographical information D ATA_G (for example cartographic information (map information)) at least.
For instance, control circuit 104 is by GNSS receiver 102 receiving position information DATA_P, and reference position information D ATA_P discerns the geographical environment of electronic installation 100 current positions.Then, control circuit 104 calculates according to electronic installation 100 residing geographical environments during the power saving, and then, control GNSS receiver 102 is entered battery saving mode and kept GNSS receiver 102 to move under battery saving mode during the calculated power saving by normal mode.For example, when the stable motion of electronic installation 100 when straight road (for example highway) is gone up, control circuit 104 is according to the motion state of positional information DATA_P and geography information DATA_G identification electronic installation 100, calculates during the power saving of suitable battery saving mode then and between the normal epoch of normal mode.Then, based on during the power saving that has calculated and between normal epoch, control circuit 104 produces control signal S
CAlternately switching electronic installation 100 enters during the power saving and between normal epoch.
In better embodiment, control circuit 104 has the navigational system that is integrated in wherein.Below will be that example is described the present invention in detail with the better embodiment.Be noted that control circuit 104 has the only explanation as an example of hardware environment that is integrated in navigational system wherein, and is not restrictive condition of the present invention.In other words, any utilization at least geography information determine that GNSS receiver 102 enters the time of battery saving mode and the electricity-saving mechanism of the time span moved all belongs to the scope that the present invention is contained under battery saving mode.And, switch GNSS receiver 102 is not restricted to cut off fully GNSS receiver 102 to battery saving mode power supply.
See also Fig. 2, Fig. 2 is the block diagram according to the electronic installation with electricity-saving function 200 of second embodiment of the invention.In the present embodiment, electronic installation 200 comprises, but is not limited to, GNSS receiver 202 and control circuit 204.Control circuit 204 comprises: computing unit 212, navigational system 214 and power-saving control unit 216.In addition, navigational system 214 is configured to have navigation processing unit 222 and storage unit 224.GNSS receiver 202 can realize by any existing receiver structure, and support at least present available GNSS system one of them, for example GPS, Galileo and GLONASS system.As is known to the person skilled in the art, GNSS receiver 202 provides positional information DATA_P and location dependent information DATA_A according to the satellite-signal that is received by tracking satellite.For example, location dependent information DATA_A comprises quantity, precision decay factor DOP (dilution of precision) and the satellites in view quantity etc. of the present velocity amplitude that is used to refer to electronic installation 200 motion states and speed average, healthy satellite (healthy satellite).Generally, positional information DATA_P and location dependent information DATA_A are by NMWA (national marine Institution of Electronics) standard transmission.
The storage unit 224 storage geography information DATA_G (for example cartographic information) of navigational system 214.Navigation feature is carried out according to geographical information D ATA_G and positional information DATA_P then by storage unit 224 access geography information DATA_G and by GNSS receiver 202 receiving position information DATA_P in navigation processing unit 222.In the present embodiment, geography information DATA_G not only is used for realizing navigation feature by navigation processing unit 222, and is used for determining during the above-mentioned power saving.Navigation processing unit 222 passes a parameter to computing unit 212, and computing unit 212 is by during calculating above-mentioned power saving with reference to one or more input parameters.For instance, parameter comprises: current position to the distance of next crossroad, be used for triggering the current position of battery saving mode during the first threshold of the distance of next crossroad, the present velocity amplitude of motion state that is used to refer to the GNSS receiver and average speed value, the power saving (be standby during or between sleep period) and between normal epoch the ratio, road attribute (for example road type and speed limit thereof) that electronic installation is positioned at, the warm start of GNSS receiver of (being between awake period) to locate during the required minimum time etc.Be noted that current position to the distance of next crossroad is a key parameter, be used for together controlling electricity-saving mechanism with geography information DATA_G.
In the present embodiment, navigation processing unit 222 provides a parameter at least, and this parameter is to determine by reference geography information DATA_G and positional information DATA_P.In addition, navigation processing unit 222 can provide other parameter according to location dependent information DATA_A.For example, above-mentioned present velocity amplitude and average speed value can be obtained easily by the location dependent information DATA_A that GNSS receiver 202 receives.Yet, be noted that, the parameter usefulness of explanation as an example only in the above-mentioned embodiment, and be not restrictive condition of the present invention.
After receiving one or more parameters by navigation processing unit 222, during computing unit 212 is determined how to set during the suitable power saving and is exported this power saving to navigation processing unit 222.Then, according to the result of calculation of computing unit 212, navigation processing unit 222 output control signal SC are to power-saving control unit 216; Then, according to control signal SC, power-saving control unit 216 is optionally controlled GNSS receiver 202 and is entered or leave battery saving mode.Because GNSS receiver 202 move with moving and compares, and has power consumption still less, that is, can reach the purpose of the power consumption of reduction electronic installation 200 under normal mode under battery saving mode.Be noted that, switch GNSS receiver 202 to battery saving mode and be not limited to cut off fully GNSS receiver 202 power supplys.After GNSS receiver 202 Be Controlled entered battery saving mode, any technology that can reduce GNSS receiver power consumption all can be used.For example, under battery saving mode, treatment circuits most in the GNSS receiver 202 disconnect, and storage system keeps state of activation to be stored in wherein to keep almanac data (ephemeris deta).By this way, during GNSS receiver 202 leaves power saving the back and finish warm start after, the almanac data of buffering can be used to quicken positioning action, so that the positional information of following the trail of visible satellite and obtaining expectation.
See also Fig. 3, Fig. 3 is for to control the synoptic diagram that GNSS receiver 202 shown in Figure 2 alternately enters normal mode and battery saving mode according to the present invention.Suppose that electronic installation 200 is the portable navigation unit that are placed in the automobile, this automobile moves along direction D.When the P1 of automobile in-position, the user starts electronic installation 200, electronic installation 200 cold start-ups then.Before the P2 of automobile in-position, GNSS receiver 202 successfully finds the satellite that needs and obtains positional information DATA_P and location dependent information DATA_A.Therefore, according to geography information DATA_G (for example cartographic information) and positional information DATA_P, navigation processing unit 222 is carried out navigation feature continuously.In addition, after the P2 of automobile in-position, above-mentioned parameter is provided to computing unit 212 with during determining suitable power saving.As shown in Figure 3, current position P2 to the distance of next crossroad be L1, compare with the first threshold L2 that triggers GNSS receiver 202 battery saving modes, distance L 1 is greater than first threshold L2.Therefore, according to range information and velocity information, computing unit 212 calculates between normal epoch S2 during the S1 and non-zero power saving, wherein during the power saving S2 and between normal epoch the ratio of S1 by the given parameter-definition in navigation processing unit 222.In addition, based on another parameter, this parameter-definition during the required minimum time of the warm start of GNSS receiver 202 with the location, S1 must be greater than during the minimum time between calculated normal epoch.
Receive between calculated normal epoch during the S1 and power saving after the S2, navigation processing unit 222 produces control signal S
CIndicate optionally activation of power-saving control unit 216 (enable) or anergy (disable) electricity-saving function.As shown in Figure 3, when automobile moved to position P3 by position P2, GNSS receiver 202 entered battery saving mode.When the P3 of automobile in-position, S2 expiration during the power saving.Therefore, according to control signal S
CIndication, power-saving control unit 216 switches to normal mode with GNSS receiver 202 by battery saving mode.That is, after the P3 of automobile in-position, GNSS receiver 202 carries out warm start.As mentioned above, even the GNSS receiver runs on battery saving mode, almanac data still remains in the storage system of GNSS receiver 202.Therefore, GNSS receiver 202 can be finished hot startup procedure fast with localized electron device 200.After a while, when automobile reached position P4, GNSS receiver 202 entered battery saving mode once more during power saving.As shown in Figure 3, after S2 had been calculated by computing unit 212 during S1 and the power saving between normal epoch, 202 beginnings of GNSS receiver alternately entered normal mode and battery saving mode.
After the P5 of automobile in-position, current position to the distance of next crossroad less than first threshold L2.At this moment, computing unit 212 changes or recomputates S2 during the power saving, and S2 is re-set as zero and comes the anergy electricity-saving mechanism during the power saving.In this way, GNSS receiver 202 is controlled as and does not enter battery saving mode, and the distance up to next crossroad of current position exceeds first threshold L2.For avoiding reducing GNSS receiver 202 performances, need to check that other condition determines whether changing or recomputating during the present power saving owing to starting electricity-saving mechanism inadequately.Below will illustrate.
When obtaining before positional information DATA_P can not S2 enters battery saving mode during GNSS receiver 202 is according to power saving, computing unit 212 changes or recomputates S2 during the power saving.For example, before the P4 of automobile in-position, when present visible satellite signal was not enough to obtain positional information DATA_P, computing unit 212 was zero during resetting power saving, therefore, anergy electricity-saving mechanism and give 202 more times of GNSS receiver and follow the trail of more visible satellites.
Before GNSS receiver 202 enters battery saving mode, when position precision is lower than second threshold value, S2 during the computing unit 212 change power savings.For example, when precision decay factor DOP indicating positions degree of accuracy was low, computing unit 212 reset that S2 is zero during the power saving, thus the anergy electricity-saving mechanism.In other words, when the position precision that can accept to monitor, the electricity-saving function of GNSS receiver 202 can be activated.
Before S2 entered battery saving mode during GNSS receiver 202 is according to power saving, when speed fluctuation exceeded the 3rd threshold value, computing unit 212 changed S2 during the power savings.For example, when automobile stopped suddenly before the P4 of in-position, because velocity amplitude is a major parameter of determining institute's foundation during the power saving, computing unit 212 recomputated S2 during the power saving.
Because control circuit 204 has the navigational system 214 that is integrated in wherein and is used to provide navigation feature, after GNSS receiver 202 Be Controlled enter battery saving mode, the navigation processing unit 222 of navigational system 214 is configured to finish navigation feature by the positional information of determining to estimate, the positional information of wherein estimating is that the available location dependent information DATA_A (for example, average speed value or final speed value) that receives when move under normal mode by GNSS receiver 202 comes definite.In addition, in the present embodiment, selectable dead reckoning unit (dead reckoning device) 230 is coupled to navigation processing unit 222, and provides the positional information of estimating according to dead reckoning.Therefore, when GNSS receiver 202 when under battery saving mode, moving during the power saving, navigation processing unit 222 can be alternatively receives the positional information that estimate by the dead reckoning unit 230 that is adopted and finishes navigation feature.
For clear more description feature of the present invention, see also Fig. 4 and Fig. 5.Fig. 4 and Fig. 5 are for to control the method flow diagram that GNSS receiver 202 switches according to the present invention between normal mode and battery saving mode.As long as the result that method obtains is identical in essence, the step that method is carried out is not limited to Fig. 4 and order shown in Figure 5.This method is carried out by electronic installation shown in Figure 2 200.Its step is as follows:
Step 400: start electronic installation 200.
Visible satellite is sought in 202 cold start-ups of step 402:GNSS receiver, and obtains positional information DATA_P according to the satellite-signal of satellite tracking.
Step 406: judge current position to the distance of next crossroad greater than first threshold? if then execution in step 408, otherwise execution in step 406.
Step 408: computing unit 212 calculates during the power saving and between normal epoch.
Step 409: navigation processing unit 222 produces control signal S according to during the calculated power saving and between normal epoch
CTo power-saving control unit 206.
Step 410: power-saving control unit 216 control GNSS receivers 202 enter battery saving mode during calculated power saving.
Step 412: expire during judging power saving? if then execution in step 414, otherwise execution in step 412 is to continue to monitor the time that GNSS receiver 202 leaves battery saving mode.
Step 414: power-saving control unit 216 control GNSS receivers 202 enter normal mode between calculated normal epoch.
Step 416: judge current position to the distance of next crossroad greater than first threshold? if then execution in step 418; Otherwise execution in step 426.
Step 418: judge that GNSS receiver 202 can obtain positional information DATA_P before normal mode enters next battery saving mode immediately at present? if then execution in step 420, otherwise execution in step 426.
Step 420: judge that position precision is greater than second threshold value? if then execution in step 422, otherwise execution in step 426.
Step 422: judge that speed fluctuation is lower than the 3rd threshold value? if then execution in step 424, otherwise execution in step 426.
Step 424: judge between calculated normal epoch and expire? if then execution in step 410, otherwise execution in step 416.
Step 426: computing unit 212 changes or recomputates during the power saving.
Step 428: judge current position to the distance of next crossroad greater than first threshold? be execution in step 409 then, otherwise execution in step 428.
Those skilled in the art should understand Fig. 4 and step operation shown in Figure 5, so in this only simple declaration after reading above-mentioned embodiment.
The above only is a better embodiment of the present invention, and all equalizations of doing according to claim of the present invention change and modify, and all should belong to covering scope of the present invention.
Claims (18)
1. the electronic installation with electricity-saving function is characterized in that, described electronic installation with electricity-saving function comprises:
Global navigation satellite system receiver is used for providing positional information according to a plurality of satellite-signals; And
Control circuit, be coupled to described global navigation satellite system receiver, during being used at least determining the power saving of described global navigation satellite system receiver according to geography information, and the described global navigation satellite system receiver that control runs on normal mode enters battery saving mode during described power saving;
Wherein said global navigation satellite system receiver is compared with moving under described normal mode in operation under the described battery saving mode, has power consumption still less.
2. the electronic installation with electricity-saving function according to claim 1 is characterized in that, described control circuit comprises:
Computing unit is during being used for calculating described power saving according at least one parameter;
The power-saving control unit is coupled to described global navigation satellite system receiver, is used for controlling described global navigation satellite system receiver and optionally enters described battery saving mode or described normal mode; And
Navigational system comprises:
Storage unit is used for storing described geography information; And
The navigation processing unit, be coupled to described storage unit, described computing unit, described global navigation satellite system receiver and described power-saving control unit, be used for carrying out navigation feature according to the described geography information of described positional information that receives from described global navigation satellite system receiver and described cell stores; Determine described parameter and extremely described computing unit of described parameter is provided according to described geography information and described positional information; And according to indicating the described global navigation satellite system receiver of described power-saving control unit controls to enter described battery saving mode during the described power saving of determining by described computing unit.
3. the electronic installation with electricity-saving function according to claim 1 is characterized in that, described control circuit is at least according to during determining described power saving by current position to the distance of next crossroad.
4. the electronic installation with electricity-saving function according to claim 3, it is characterized in that described control circuit is more by during one of them determines described power saving with reference to following parameter: the threshold value that is used for triggering the described distance of described battery saving mode, be used to refer to the present velocity amplitude and the average speed value of the motion state of described global navigation satellite system receiver, during the described power saving and the ratio between normal epoch, road attribute that described electronic installation is positioned at or described global navigation satellite system receiver warm start are with during locating required minimum time.
5. the electronic installation with electricity-saving function according to claim 1, it is characterized in that, described control circuit more calculated between the normal epoch of described normal mode, and control described global navigation satellite system receiver according to during the described power saving and between described normal epoch, alternately enter described battery saving mode and described normal mode.
6. the electronic installation with electricity-saving function according to claim 5, it is characterized in that, when not obtaining described positional information before entering described battery saving mode during the described power saving of described global navigation satellite system receiver foundation, described control circuit changes during the described power saving.
7. the electronic installation with electricity-saving function according to claim 5, it is characterized in that, when described global navigation satellite system receiver was lower than threshold value according to position precision before entering described battery saving mode during the described power saving, described control circuit changed during the described power saving.
8. the electronic installation with electricity-saving function according to claim 5, it is characterized in that, when described global navigation satellite system receiver exceeded threshold value according to speed fluctuation before entering described battery saving mode during the described power saving, described control circuit changed during the described power saving.
9. the electronic installation with electricity-saving function according to claim 5, it is characterized in that, before entering described battery saving mode during the described power saving of described global navigation satellite system receiver foundation, when current position to the distance of next crossroad during less than threshold value, described control circuit changes during the described power saving.
10. the method for an operating electronic devices, described electronic installation has global navigation satellite system receiver, and described method comprises:
Utilize described global navigation satellite system receiver to provide positional information according to a plurality of satellite-signals;
At least during determining the power saving of described global navigation satellite system receiver according to geography information; And
Control runs on described global navigation satellite system receiver under the normal mode and enters battery saving mode in during described power saving;
Wherein said global navigation satellite system receiver is compared with moving under described normal mode in operation under the described battery saving mode, has power consumption still less.
11. the method for operating electronic devices according to claim 10 is characterized in that, described method more comprises:
Store described geography information; And
Geography information according to described positional information that receives from described global navigation satellite system receiver and described storage is carried out navigation feature.
12. the method for operating electronic devices according to claim 10, it is characterized in that, determine that the step during the described power saving of described global navigation satellite system receiver more comprises: determine during the described power saving with reference to current position to the distance of next crossroad at least.
13. the method for operating electronic devices according to claim 12, it is characterized in that, determine that the step during the described power saving of described global navigation satellite system receiver more comprises: one of them is determined during the described power saving with reference to following parameter: the threshold value that is used for triggering the described distance of described battery saving mode, be used to refer to the present velocity amplitude and the average speed value of the motion state of described global navigation satellite system receiver, during the described power saving and the ratio between normal epoch, road attribute that described electronic installation is positioned at or described global navigation satellite system receiver warm start are determined during the described power saving with during locating required minimum time.
14. the method for operating electronic devices according to claim 10, it is characterized in that, determine that according to described geography information the step during the described power saving of described global navigation satellite system receiver more comprises: calculate between the normal epoch of described normal mode; And the step that the control described global navigation satellite system receiver that runs on described normal mode enters described battery saving mode in during described power saving more comprises: control described global navigation satellite system receiver according to during the described power saving and alternately enter described battery saving mode and described normal mode between described normal epoch.
15. the method for operating electronic devices according to claim 14, it is characterized in that, when before entering described battery saving mode during the described power saving of described global navigation satellite system receiver foundation, not obtaining described positional information, change during the described power saving.
16. the method for operating electronic devices according to claim 14, it is characterized in that, when described global navigation satellite system receiver is lower than threshold value according to position precision before entering described battery saving mode during the described power saving, change during the described power saving.
17. the method for operating electronic devices according to claim 14, it is characterized in that, when described global navigation satellite system receiver exceeds threshold value according to speed fluctuation before entering described battery saving mode during the described power saving, change during the described power saving.
18. the method for operating electronic devices according to claim 14, it is characterized in that, before entering described battery saving mode during the described power saving of described global navigation satellite system receiver foundation, when current position to the distance of crossroad once during less than threshold value, change during the described power saving.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US94526607A | 2007-11-27 | 2007-11-27 | |
| US11/945,266 | 2007-11-27 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101446630A true CN101446630A (en) | 2009-06-03 |
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ID=40742406
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2008100808431A Pending CN101446630A (en) | 2007-11-27 | 2008-02-21 | Electronic device with electricity-saving function and operation method thereof |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN101446630A (en) |
| TW (1) | TWI408396B (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102207551A (en) * | 2010-03-29 | 2011-10-05 | 富士通株式会社 | Portable mobile terminal and computer readable medium |
| CN104749592A (en) * | 2013-12-31 | 2015-07-01 | 环达电脑(上海)有限公司 | GPS navigation system having power-saving function and power saving method therefor |
| CN105579866A (en) * | 2014-09-05 | 2016-05-11 | 联发科技股份有限公司 | Method and apparatus for power saving in global navigation satellite systme (GNSS) receivers |
| CN105865466A (en) * | 2016-03-29 | 2016-08-17 | 努比亚技术有限公司 | Intelligent navigation system and method thereof |
| CN106855627A (en) * | 2016-12-29 | 2017-06-16 | 湖南国科微电子股份有限公司 | A kind of method for reducing GNSS receiver power consumption, device and receiver |
| CN107367742A (en) * | 2016-05-12 | 2017-11-21 | 北京搜狗科技发展有限公司 | A kind of electricity saving method based on navigation, device and electronic equipment |
| CN109496275A (en) * | 2017-12-18 | 2019-03-19 | 深圳市大疆创新科技有限公司 | The control method and moveable platform of moveable platform |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6377209B1 (en) * | 1997-02-03 | 2002-04-23 | Snaptrack, Inc. | Method and apparatus for satellite positioning system (SPS) time measurement |
| TWI273268B (en) * | 2005-09-19 | 2007-02-11 | Mitac Int Corp | Portable electronic apparatus and method with energy saving function |
| TWI290229B (en) * | 2006-01-25 | 2007-11-21 | Mitac Int Corp | Electricity-saving method for global position system |
-
2008
- 2008-01-22 TW TW97102351A patent/TWI408396B/en not_active IP Right Cessation
- 2008-02-21 CN CNA2008100808431A patent/CN101446630A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102207551A (en) * | 2010-03-29 | 2011-10-05 | 富士通株式会社 | Portable mobile terminal and computer readable medium |
| US8391888B2 (en) | 2010-03-29 | 2013-03-05 | Fujitsu Limited | Portable mobile terminal and computer readable medium |
| CN104749592A (en) * | 2013-12-31 | 2015-07-01 | 环达电脑(上海)有限公司 | GPS navigation system having power-saving function and power saving method therefor |
| CN105579866A (en) * | 2014-09-05 | 2016-05-11 | 联发科技股份有限公司 | Method and apparatus for power saving in global navigation satellite systme (GNSS) receivers |
| CN105579866B (en) * | 2014-09-05 | 2017-10-03 | 联发科技股份有限公司 | Method and apparatus for being saved in GNSS receiver |
| CN105865466A (en) * | 2016-03-29 | 2016-08-17 | 努比亚技术有限公司 | Intelligent navigation system and method thereof |
| CN107367742A (en) * | 2016-05-12 | 2017-11-21 | 北京搜狗科技发展有限公司 | A kind of electricity saving method based on navigation, device and electronic equipment |
| CN107367742B (en) * | 2016-05-12 | 2021-08-17 | 北京搜狗科技发展有限公司 | Power saving method and device based on navigation and electronic equipment |
| CN106855627A (en) * | 2016-12-29 | 2017-06-16 | 湖南国科微电子股份有限公司 | A kind of method for reducing GNSS receiver power consumption, device and receiver |
| CN109496275A (en) * | 2017-12-18 | 2019-03-19 | 深圳市大疆创新科技有限公司 | The control method and moveable platform of moveable platform |
Also Published As
| Publication number | Publication date |
|---|---|
| TW200923395A (en) | 2009-06-01 |
| TWI408396B (en) | 2013-09-11 |
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