CN1714593A - Fast reacquisition after long sleep in slotted mode operation - Google Patents
Fast reacquisition after long sleep in slotted mode operation Download PDFInfo
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- CN1714593A CN1714593A CNA038256762A CN03825676A CN1714593A CN 1714593 A CN1714593 A CN 1714593A CN A038256762 A CNA038256762 A CN A038256762A CN 03825676 A CN03825676 A CN 03825676A CN 1714593 A CN1714593 A CN 1714593A
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- mobile radio
- radio station
- district
- conversion
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- 238000006243 chemical reaction Methods 0.000 claims description 35
- 238000004891 communication Methods 0.000 claims description 33
- 238000000034 method Methods 0.000 claims description 15
- 230000004913 activation Effects 0.000 claims 1
- 239000002775 capsule Substances 0.000 abstract 1
- 238000012423 maintenance Methods 0.000 description 3
- 238000012544 monitoring process Methods 0.000 description 3
- 230000002618 waking effect Effects 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000000295 complement effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- GOLXNESZZPUPJE-UHFFFAOYSA-N spiromesifen Chemical compound CC1=CC(C)=CC(C)=C1C(C(O1)=O)=C(OC(=O)CC(C)(C)C)C11CCCC1 GOLXNESZZPUPJE-UHFFFAOYSA-N 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/02—Power saving arrangements
- H04W52/0209—Power saving arrangements in terminal devices
- H04W52/0225—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal
- H04W52/0245—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal according to signal strength
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/24—Reselection being triggered by specific parameters
- H04W36/30—Reselection being triggered by specific parameters by measured or perceived connection quality data
- H04W36/304—Reselection being triggered by specific parameters by measured or perceived connection quality data due to measured or perceived resources with higher communication quality
-
- 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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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
The mobile station is in the sleep mode until just prior to a designated slot. Upon wakeup, the mobile station ensures a link is maintained with the network by measuring the strength of several pilots. If a neighbor pilot is stronger than the current pilot, a handoff is performed. After handoff, the Control Channel Capsule (CCC) may be demodulated by the mobile station to obtain new overhead information, such as neighbor pilots. If no handoff is performed, the reacquisition slew for the current pilot is measured and fed back to the sleep controller to determine the next wake-up time. The mobile station then returns to sleep mode.
Description
The cross reference of related application
The application requires in the 60/391st, No. 939 U.S. Provisional Application No. of submission on June 28th, 2002, and the latter's content is incorporated into this by reference fully.
Technical field
The present invention relates to wireless communication system, relate in particular to and use the preceding sleep of district's conversion more to improve the stand-by time of mobile radio station.
Background technology
Wireless communication system can use fixing infrastructure equipment or operation in special configuration.In fixed infrastructure models, wireless communication system generally comprises a plurality of base stations and the mobile radio station that uses the air communication agreement to communicate, the such physical-layer techniques of described agreement employing code division multiple access (CDMA) technology.
Use multiple channel to operate such as the such wireless communication system of CDMA is general.In CDMA, for example, channelizing is finished with the coding of quadrature or class quadrature.Different channels generally has different purposes.Common signal channel is used for simultaneously and a plurality of mobile radio station or base station communication, and dedicated channel generally is used for communicating with a mobile radio station.
In the system that is equipped with CDMA, mobile radio station communicates with the one or more of a plurality of base stations that are distributed in the geographic area.Each base station sends the pilot signal that has identical spreading codes but have the phase deviation of different sign indicating number continuously.Phase deviation can be distinguished pilot signal, and this can distinguish the base station again.And mobile radio station can be measured the signal to noise ratio of each pilot signal, and signal to noise ratio shows the relative signal intensity of pilot tone.
In wireless system, it is important making the ability of the power consumption minimum in the mobile radio station.The paging system that divides time slot can make mobile radio station pass through not monitor that in a period of time thereby beep-page message keeps power.Like this, mobile radio station can not separated the timing sleep at beep-page message.Beep-page message comprises and base-station-related information, comprises neighbor list.If lock-on signal before paging time-slot can further make the power consumption minimum in the mobile radio station in the circulatory system of minute time slot.
Hybrid access terminal can monitor a plurality of systems, such as the system that is used for voice communication be used for second system of data communication.Particularly, use the hybrid system of slotted paging to be good, because cause the lower power consumption in the mobile radio station length of one's sleep that has increased.
What need is to make the time quantum minimum of second system of supervision and a kind of system of still providing " momentary connection " to insert when expectation simultaneously.
Summary of the invention
Mobile radio station is in sleep pattern before the time slot of appointment.After waking up, mobile radio station guarantees that by the intensity of measuring several pilot tones link maintenance is on network.If adjacent pilot tone is stronger than current pilot, then carry out district's conversion more.After the district changed more, mobile radio station can carry out demodulation so that obtain new Overhead to control channel box (CCC), such as adjacent pilot frequencies.If do not carry out any conversion of district more, then measure catching revolution again and it being fed back to the sleep controller to determine wakeup time next time of current pilot.If mobile radio station does not receive a paging, mobile radio station just returns sleep pattern.
Read following detailed description and with reference to behind the accompanying drawing, it is more obvious that theme of the present invention will become.
Description of drawings
Fig. 1 has illustrated the assembly of an example wireless communications.
Fig. 2 has illustrated the assembly according to the mobile radio station of one aspect of the present invention.
Fig. 3 has illustrated the example that can carry out the mixed wireless network of voice communications versus data communications.
Fig. 4 has illustrated the process 400 of the preceding sleep of the conversion of district more of using mobile radio station 106.
Fig. 5 is the sequential chart that voice conversation, data session and the sequential that both mix are shown.
Fig. 6 is the sequential chart of both that voice conversation, data session are shown and use that disclosed method draws sequential of mixing.
Embodiment
Fig. 1 has illustrated the assembly of an example wireless communications.Mobile switching centre 12 communicates with base station 104a-104k (only illustrating is connected).Base station 104a-104k (being referred to as 104) data broadcasting in the sub-district 108a-108k (being referred to as 108) mobile radio station 106 or therefrom receive data.Sub-district 108 is geographic areas, is hexagonal basically, and radius is up to 35 kms or may be higher.
According to the CDMA standard, additional cell 108a, 108c, 108d and the 108e adjacent with sub-district 108b makes mobile radio station 106 stride across cell boarder under the situation of not interrupt communication.This is because base station 104a, 104c, 104d and 104e in the neighbor cell have served as transmitting and receive data for mobile radio station 106 of task.All communications of mobile radio station 106 are coordinated to come and go in the cell area more than by mobile switching centre 102.Like this, mobile switching centre 102 can communicate with many base stations 104.
One example of this mobile radio station 106 is by the employed mobile phone of a group traveling together, opens mobile phone because connecing a phone when this pedestrian walks in sub-district 108.Mobile phone scans specific frequency (being the known spendable frequency of CDMA) so that synchronous with base station 104.Then, mobile phone is registered so that make the active user that oneself becomes in the cdma network to mobile switching centre 102.
When detecting a calling, the Frame that mobile phone scanning base station 104 is broadcasted is to detect any call or the beep-page message that points to mobile phone.In this call detection mode, mobile phone receives, preserves and the check paging message data, and determines whether these data comprise the moving station mark symbol that is complementary with the mobile phone identifier.If detect a coupling, mobile phone is just via the calling of base station 104 foundation with mobile switching centre 102.If the coupling of not detecting, mobile phone just enter idle condition in a predetermined amount of time, exit from idle status then with another time transmission of paging receiving message data.
Fig. 2 has illustrated the mobile radio station 106 according to one embodiment of the invention.Mobile radio station 106 comprises processor 200, memory 205 and receiver 210.Receiver 210 can be the transceiver that can receive and send a plurality of signals by wireless communication system.Processor 200 is configured to activate and forbid this receiver in time of appointment, and handles the received signal of receiver 210.Memory 205 preservation information, and can or from processor 200 ends, or information offered processor 200.
Fig. 3 is the example that can carry out the mixed wireless network 300 of voice communications versus data communications.In mixed wireless network 300, the base station 305 of mobile radio station 106 and the voice and data network of linking combination and the base station 310 of linking data network communicate.Wireless network can use arbitrary form for voice communications versus data communications.For example, CDMA2000 can be used for voice communication, and 1xev (being also referred to as high data rate (HDR)) can be used for data communication.The base station 305 of linking speech network is linked to packet data serving node (PDSN) 315 and is used for data communication, also is linked to telephone operator 320 and is used for voice or voice communications versus data communications.PDSN 315 link telephone operator 320 and the Internet 330 both.Telephone operator 320 can link plain old telephone system (POTS) 322 and be used for voice communication.The base station 3 10 of linking data network is linked to PDSN 325, and PDSN 325 links the Internet 330 again.Both make the mobile radio station use compare the quantity of power that the supervision individual system is similar to twice to monitor the voice-and-data system.This power that has improved uses and has shortened battery life greatly.
For saving power, one of two systems of unnecessary supervision of many times are arranged, because system is transformed into another system in the district more.For purposes of illustration, suppose that by the system of district's conversion more be second system, i.e. data system.Certainly, can distinguish the arbitrary system of conversion more.Although unnecessary supervision second system, quick access is guaranteed in expectation.By receiving pilot signal but only, can insert for second system provide " momentary connection " at district's conversion back demodulated pilot signal more.Therefore, " sleep before district's conversion more " can be used for continuing second system that monitors, inserts but still have " momentary connection ", but also greatly reduces power consumption.
Overhead changes once in a while, and need not from arbitrary pilot tone more than once being received.If do not require district's conversion more, mobile radio station can return sleep.If require district's conversion more, then monitor the Overhead (such as neighbor list) of CCC to obtain new pilot tone.When data session was transferred to voice conversation, mobile radio station need not to monitor whether CCC has paging, did not arrive because do not have paging.Therefore, mobile radio station can return sleep pattern (low-power consumption) quickly, causes short waking up (high power consumption) time.Because mobile radio station still is exactly adjacent pilot frequency intensity, therefore can be along with mobile radio station move and district's conversion more between pilot tone in network, system is available immediately when needed, and presents the state of always opening.
By using " sleep before district's conversion more ", mobile radio station is in the sleep pattern before the time slot of appointment.After waking up, mobile radio station guarantees that by the intensity of measuring several pilot tones a link maintenance is on network.If adjacent pilot tone is stronger than current pilot, then carry out district's conversion more.After the district changed more, mobile radio station can carry out demodulation to obtain new Overhead, such as neighbor list to control channel box (CCC).If do not carry out any conversion of district more, then measure catching revolution again and it being fed back to the sleep controller to determine wakeup time next time of current pilot.Mobile radio station then returns sleep pattern.
If mobile radio station does not move and be equidistantly approximate between a plurality of base stations, then mobile radio station may be attempted district's conversion more between the base station continuously.Be saving power, mobile radio station can carry out high-speed cache to Overhead, and obtains the necessary transitional information of distinguishing more from high-speed cache, but not to the pilot signal demodulation.
Fig. 4 has illustrated the process 400 of the preceding sleep of the conversion of district more of using mobile radio station 106.Process 400 is from initial state 405.Advance to square frame 410, mobile radio station 106 is transferred to first system of supervision from monitoring second system.By shifting the supervision of second system, mobile radio station 106 need not to monitor whether CCC has paging, does not arrive because do not have paging.Owing to only monitor a system now, so mobile radio station 106 can enter sleep pattern apace.
Advance to square frame 415, mobile radio station 106 enters sleep pattern.In sleep pattern, the operation of the great majority of mobile radio station is closed, thereby has reduced power consumption.Mobile radio station 106 retention time in sleep pattern is long more, and the battery life of mobile radio station 106 is just long more.Therefore, expectation remains in the sleep pattern mobile radio station 106 as much as possible.
Advance to square frame 420, mobile radio station 106 woke up in the time of appointment, and the intensity of measurement of pilot signals.Again catch revolution and determined when mobile radio station wakes up so that handle pilot signal at the time slot of appointment.Mobile radio station 106 wakes and checks pilot signal up before the time slot of appointment.Relative intensity that can measurement of pilot signals is need to determine whether district's conversion more.
Advance to square frame 425, mobile radio station 106 need to determine whether district's conversion more.Generally speaking, if adjacent pilot signal is stronger than current pilot signal, can wish that then the district is transformed into this adjacent pilot frequencies more.Like this, the relative intensity of the more measured pilot signal of processor of mobile radio station 106 if a signal except that the current pilot signal has the highest power, is then authorized district's conversion more, and process 400 advances to square frame 430 along "Yes" branch.At square frame 430, this pilot signal of demodulation is to obtain Overhead, such as channel list and new neighbor list.Signal is only being got over conversion back, district by demodulation, thereby makes mobile radio station 106 can enter sleep pattern quickly unnecessary getting over when the district changes.
Advance to square frame 435, Overhead is stored in the memory of mobile radio station 106.If mobile radio station 106 is static and approximate equidistant between two base stations, then can use this information.Mobile radio station can be cached at this Overhead in the memory, and obtains the necessary information of district's conversion more from cache memory, but not this pilot signal of demodulation.After having preserved Overhead, process 400 is returned square frame 415, and wherein mobile radio station 106 reenters sleep pattern.
Return square frame 425, the strongest if current pilot signal remains, then without any need for district's conversion more, process 400 advances to square frame 445 along "No" branch.In square frame 445, for the current pilot signal metric is caught revolution again.Again catch revolution be used to notify mobile radio station 106 it need to check the time of pilot signal next time.When determining that it needs to wake up next time, mobile radio station 106 returns sleep pattern in square frame 415.
Fig. 5 is the sequential chart that voice conversation, data session and the sequential that both mix are shown.In voice conversation, mobile radio station 106 is periodically activated in the preset time section indicated as 505.In data session, mobile radio station 106 is also periodically activated in the preset time section indicated as 510.When mobile radio station 106 monitored two systems, mobile radio station 106 activated during each of section 505,510 at the fixed time, causes mobile radio station maintenance activity quite continually.
Fig. 6 is the sequential chart of both that voice conversation, data session are shown and use that disclosed method obtains sequential of mixing.In hybrid session, the receiver of mobile radio station 106 is closed before the time slot of monitoring data session.Therefore, the used time period 610 of mobile radio station 106 monitoring data sessions is shorter than the time period 510 greatly.This makes mobile radio station can reenter sleep pattern quickly, thereby consumes less power.
Although described equipment of the present invention with reference to accompanying drawing in conjunction with the preferred embodiments of the present invention, yet noted, variations and modifications are conspicuous for those skilled in the art.Be appreciated that this variation and modification are included in the scope of the present invention that is defined by claims.
Claims (26)
1. mobile radio station comprises:
Be used to receive the receiver of a plurality of signals; And
Receiver control is also analyzed a plurality of Signal Processing devices, described processor is configured to activate receiver before paging time-slot, and determine whether more district's conversion of expectation based on a plurality of signals, if wherein do not expect any conversion of district more, described processor is just forbidden receiver before paging time-slot.
2. mobile radio station as claimed in claim 1 is characterized in that, described processor is kept at described a plurality of signals in the memory.
3. mobile radio station as claimed in claim 1 is characterized in that, described a plurality of signals comprise pilot signal.
4. mobile radio station as claimed in claim 3 is characterized in that, described processor determines whether expectation district's conversion more by the relative intensity that compares pilot signal.
5. mobile radio station as claimed in claim 1 is characterized in that, described processor more carries out demodulation to described a plurality of signals one or more during district's conversion in expectation.
6. mobile radio station as claimed in claim 5 is characterized in that, described processor is kept at the signal message through demodulation in the memory.
7. mobile radio station as claimed in claim 6 is characterized in that, described processor is distinguished more for repeating between the signal area and change the signal message of searching through demodulation from memory.
8. mobile radio station as claimed in claim 1 is characterized in that described processor determines when the activation receiver based on predetermined amount of time.
9. method of catching again fast comprises:
Before the time of appointment, receive a plurality of signals;
Analyze described a plurality of signal to determine whether to exist trigger event; And
The then at the appointed time preceding forbidding receiver of if there is no described trigger event.
10. method as claimed in claim 9 is characterized in that also comprising: if having described trigger event then the described a plurality of signals of demodulation one or more.
11. method as claimed in claim 9 is characterized in that also comprising, determines whether that expectation is converted into trigger event in the district more.
12. method as claimed in claim 10 is characterized in that also comprising, preserves the signal message through demodulation.
13. method as claimed in claim 12 is characterized in that also comprising, distinguishes more for repeating between the signal area and change the signal message of searching through demodulation from memory.
14. method as claimed in claim 11 is characterized in that also comprising, the relative intensity of more described a plurality of signals is to determine whether expectation district's conversion more.
15. a wireless communication system comprises:
A plurality of base stations, each of described a plurality of base stations all send a pilot signal; And
The mobile radio station that activates before paging time-slot is used for receiving and the analysis pilot signal is distinguished conversion more to determine whether expectation, if wherein do not expect to get over district's conversion, then mobile radio station is forbidden before paging time-slot.
16. wireless communication system as claimed in claim 15 is characterized in that, if expectation district's conversion more, mobile radio station just carries out demodulation to obtain Overhead to pilot signal.
17. wireless communication system as claimed in claim 16 is characterized in that, described mobile radio station is kept at Overhead in the memory.
18. wireless communication system as claimed in claim 15 is characterized in that, described mobile radio station is carried out district's conversion more based on Overhead.
19. wireless communication system as claimed in claim 17 is characterized in that, described mobile radio station is for two or more of a plurality of base stations repeat district's conversion more and use Overhead in the memory.
20. wireless communication system as claimed in claim 15 is characterized in that, the relative intensity by more described a plurality of pilot signals in described the moving determines whether expectation district's conversion more.
21. a mobile radio station comprises:
Be used for before the time of appointment, receiving the device of a plurality of signals;
Be used to analyze described a plurality of signal to determine whether to exist the device of trigger event; And
If there is no trigger event then at the appointed time before the forbidding receiver device.
22. mobile radio station as claimed in claim 21 is characterized in that also comprising: if having trigger event then to one or more devices that carry out demodulation of described a plurality of signals.
23. mobile radio station as claimed in claim 21 is characterized in that also comprising: be used to determine whether to expect to distinguish more the device that is converted into trigger event.
24. mobile radio station as claimed in claim 22 is characterized in that also comprising: be used to preserve device through the signal message of demodulation.
25. mobile radio station as claimed in claim 24 is characterized in that also comprising: for repeating more district's conversion and search device between the signal area through the signal message of demodulation from memory.
26. mobile radio station as claimed in claim 23 is characterized in that also comprising: the relative intensity of more described a plurality of signals is to determine whether to expect the device of district's conversion more.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US10/292,191 US6973310B2 (en) | 2002-06-26 | 2002-11-11 | Fast reacquisition after long sleep |
| US10/292,191 | 2002-11-11 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1714593A true CN1714593A (en) | 2005-12-28 |
Family
ID=32312140
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA038256762A Pending CN1714593A (en) | 2002-11-11 | 2003-06-28 | Fast reacquisition after long sleep in slotted mode operation |
Country Status (4)
| Country | Link |
|---|---|
| CN (1) | CN1714593A (en) |
| AU (1) | AU2003256328A1 (en) |
| MX (1) | MXPA05005050A (en) |
| WO (1) | WO2004045236A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101496437B (en) * | 2006-08-01 | 2012-07-04 | 高通股份有限公司 | Dynamic warm-up time for a wireless device in idle mode |
| CN109544893A (en) * | 2019-01-09 | 2019-03-29 | 福州大学 | A kind of low noise real-time radio data collection system suitable for civil structure monitoring |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20080002760A (en) | 2005-02-14 | 2008-01-04 | 노키아 코포레이션 | System, network, mobile terminal, computer program product and method for cross-paging a mobile terminal via a data burst message |
| US8451740B2 (en) * | 2008-04-01 | 2013-05-28 | Qualcomm Incorporated | Compensating for drifts occurring during sleep times in access terminals |
| US8457067B2 (en) * | 2008-09-15 | 2013-06-04 | Qualcomm Incorporated | Cache with variable lifetime for storing overhead messages for femto deployments |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5987012A (en) * | 1996-12-19 | 1999-11-16 | Motorola, Inc. | Method of handing off and a wireless communication device |
| US6356538B1 (en) * | 1998-03-30 | 2002-03-12 | Oki Telecom, Inc. | Partial sleep system for power savings in CDMA wireless telephone devices |
| AU1910400A (en) * | 1998-11-12 | 2000-06-05 | Ericsson Inc. | Wireless communications methods and apparatus employing paging attribute descriptors |
| KR20030011808A (en) * | 2000-03-31 | 2003-02-11 | 콸콤 인코포레이티드 | Reacquisition and handoff in a slotted mode communication system |
-
2003
- 2003-06-28 WO PCT/US2003/020392 patent/WO2004045236A1/en not_active Application Discontinuation
- 2003-06-28 AU AU2003256328A patent/AU2003256328A1/en not_active Abandoned
- 2003-06-28 CN CNA038256762A patent/CN1714593A/en active Pending
- 2003-06-28 MX MXPA05005050A patent/MXPA05005050A/en active IP Right Grant
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101496437B (en) * | 2006-08-01 | 2012-07-04 | 高通股份有限公司 | Dynamic warm-up time for a wireless device in idle mode |
| CN109544893A (en) * | 2019-01-09 | 2019-03-29 | 福州大学 | A kind of low noise real-time radio data collection system suitable for civil structure monitoring |
| CN109544893B (en) * | 2019-01-09 | 2023-09-22 | 福州大学 | Low-noise real-time wireless data acquisition system suitable for civil structure monitoring |
Also Published As
| Publication number | Publication date |
|---|---|
| AU2003256328A1 (en) | 2004-06-03 |
| WO2004045236A1 (en) | 2004-05-27 |
| MXPA05005050A (en) | 2005-09-08 |
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