CN105162660A - Pulse compression distance measurement method of star network conforming to IEEE802.15.4 standard - Google Patents
Pulse compression distance measurement method of star network conforming to IEEE802.15.4 standard Download PDFInfo
- Publication number
- CN105162660A CN105162660A CN201510592459.XA CN201510592459A CN105162660A CN 105162660 A CN105162660 A CN 105162660A CN 201510592459 A CN201510592459 A CN 201510592459A CN 105162660 A CN105162660 A CN 105162660A
- Authority
- CN
- China
- Prior art keywords
- function device
- network coordinator
- reduced function
- network
- pan
- 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.)
- Pending
Links
- 238000007906 compression Methods 0.000 title claims abstract description 33
- 230000006835 compression Effects 0.000 title claims abstract description 32
- 238000000691 measurement method Methods 0.000 title abstract 3
- 238000000034 method Methods 0.000 claims abstract description 31
- 230000006854 communication Effects 0.000 claims abstract description 30
- 238000004891 communication Methods 0.000 claims abstract description 16
- 230000005540 biological transmission Effects 0.000 claims abstract description 14
- 230000007246 mechanism Effects 0.000 claims abstract description 10
- 101100172132 Mus musculus Eif3a gene Proteins 0.000 claims abstract description 6
- 230000008569 process Effects 0.000 claims description 5
- 238000012545 processing Methods 0.000 claims description 4
- 230000001360 synchronised effect Effects 0.000 claims description 3
- 238000012546 transfer Methods 0.000 claims description 3
- 238000005516 engineering process Methods 0.000 abstract description 9
- 238000005259 measurement Methods 0.000 abstract description 5
- 238000004364 calculation method Methods 0.000 abstract description 2
- 230000008901 benefit Effects 0.000 description 3
- 238000001514 detection method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 241000792861 Enema pan Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000008520 organization Effects 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L43/00—Arrangements for monitoring or testing data switching networks
- H04L43/08—Monitoring or testing based on specific metrics, e.g. QoS, energy consumption or environmental parameters
- H04L43/0852—Delays
- H04L43/0864—Round trip delays
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/44—Star or tree networks
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Environmental & Geological Engineering (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
The invention provides a pulse compression distance measurement method of a star network conforming to an IEEE802.15.4 standard. The star network conforming to the IEEE802.15.4 standard is configured, the star network comprises a network coordinator PAN and a reduced function device RFD, the network coordinator PAN uses a carrier with collision avoidance and based on time slot to monitor multiple paths of access mechanisms accessing CSMA/CA to carry out channel competition access with the reduced function device RFD, and the distance measurement between the network coordinator PAN and the reduced function device RFD is finished by use of a pulse compression method when finishing data transmission. By adopting the pulse compression distance measurement method provided by the invention, on the basis of retaining the low complexity, low power consumption, low cost and one-to-many communication of the IEEE802.15.4 standard protocol, a pulse compression signal modulation and calculation method is merged at a carrier modulation state, compared with the existing ZigBee communication using the IEEE802.15.4 standard, a remote multi-target distance measurement function is added, higher distance measurement precision is provided, and since the existing related communication chip industry is quite mature, the cost of the technology is much less than that of traditional radars.
Description
Technical field
The present invention relates to a kind of pulse compression distance-finding method meeting IEEE802.15.4 standard Star Network.
Background technology
802.15.4 wireless standard is the wireless standard that IEEE passed through in May, 2003, wireless technology based on this standard is mainly used in the communications field, the central coordinator in star network topology (i.e. PAN telegon) and multiple reduced function device (RFD) can be made to carry out data transmission, there is channel energy detection (ED) while low-power consumption, function and the time slot guarantees (GTS) such as link-quality instruction (LQI), carrier sense (CSMA), the advantages such as ACK mechanism are to ensure transmitting, be widely used in furniture automation, toy and health care there, also some are had to utilize above advantage to carry out the trial of one-to-many distance measurement function application.But, this standard is mainly used in ZigBee wireless communication technology at present, that this technology adopts in the carrier modulation of physical layer is skew quadriphase PSK (OffsetQuadraturePhaseShiftKeying, O-QPSK) mode, which mainly lays particular emphasis on communication, transmission range is about 10m ~ 100m, does not meet the requirement of range finding in a lot of outdoor occasion.Pulse compression is the technological means that can use in modern radar range finding application, come in raising radar average power by launching large Timed automata signal, process of pulse-compression is carried out at receiving terminal by modes such as matched filtering, solution linear frequency modulations while improving operating distance, large Timed automata signal is become a burst pulse, improves distance resolution.
The retrieval of domestic and foreign databases is carried out to prior art, in the document delivered in the open both at home and abroad and limited range retrieved or patent, has retrieved two sections of documents and materials.1, November 3 2010 publication date, Koninklijke Philips Electronics N.V, license CN101023632B, " in master/slave network and ADHOC network, completing transmission time measurement by eavesdropping message ", describe by using eavesdropping to obtain the distance of electronic equipment or the method for positional information, the application background of this patent is typical ZigBee technology, have no the introduction of IEEE802.15.4 standard and impulse compression method being merged mutually, its range of application is also household electronic equipment position acquisition, the scope that operating distance can reach well below the present invention.2, August 29 2008 publication date, Television Broadcasts Limited, publication number CN102204372A, " enhancement mode indoor positioning ", describe how in indoor environment by rated output and the current location itself and reference quantity relatively being determined electronic mobile device, although be applied to the substandard distance-finding method of IEEE802.15.4 equally, its embodiment and the present invention are also distinct, only carry out position estimation according to power, the low of its precision is apparent, and this invention is also be confined to indoor utilization.
In sum, prior art unexposed have IEEE802.15.4 standard and pulse compression means carried out merging thus in Star Network, carry out the method for multi-Goal Measure.
Summary of the invention
The invention provides a kind of pulse compression distance-finding method meeting IEEE802.15.4 standard Star Network, on the basis remaining this IEEE802.15.4 standard agreement low complex degree, low-power consumption, low cost, one-to-many communication, by merging signal madulation and the calculation method of pulse compression in the carrier modulation stage, add long-range multi-Goal Measure function compared to using the ZigBee communication of IEEE802.15.4 standard at present and there is higher range accuracy, and due to current related communication chip industry quite ripe, the cost of this technology is well below conventional radar.
In order to achieve the above object, the invention provides a kind of pulse compression distance-finding method meeting IEEE802.15.4 standard Star Network, configuration meets the star network of IEEE802.15.4 standard, network coordinator PAN and reduced function device RFD is comprised in star network, network coordinator PAN adopts the Carrier Sense Multiple Access CSMA/CA channel access mechanisms of timeslot-based band conflict avoidance and reduced function device RFD to carry out channel competition access, while completing transfer of data, the method of employing pulse compression completes the range finding between network coordinator PAN and reduced function device RFD.
The star network that configuration meets IEEE802.15.4 standard comprises following steps:
Step S1, define grid telegon PAN;
Network coordinator PAN main frame powers on, and is configured to the network coordinator PAN meeting IEEE802.15.4 standard;
Step S2, network coordinator PAN periodically broadcast beacon frame;
Step S3, registration reduced function device RFD;
Step S4, configuration star network;
When network coordinator PAN arranges and communicates between network coordinator PAN and registered reduced function device RFD, any equipment all needs after receiving Frame to send acknowledgement frame.
Registration reduced function device RFD comprises following steps:
After the reduced function device RFD being positioned at network coordinator PAN finding range powers on, if reduced function device RFD have received the beacon frame that network coordinator PAN broadcasts, then send registration request to network coordinator PAN, after network coordinator PAN receives the registration request of reduced function device RFD, by the network address of reduced function device RFD stored in the object listing in network coordinator PAN, and be respectively reduced function device RFD by the ensuring mechanism time slot GTS meeting IEEE802.15.4 and distribute special communication time period, realize network associate and the clock synchronous of network coordinator PAN and reduced function device RFD.
For single reduced function device RFD, the range finding adopting the method for pulse compression to complete between network coordinator PAN and reduced function device RFD comprises following steps:
Step S501, network coordinator PAN send the first Frame to RFD, and record the time now;
Step S502, reduced function device RFD return the first acknowledgement frame to network coordinator PAN after receiving the first Frame, contain reduced function device RFD from receiving the time T2 consumed the first Frame to transmission first acknowledgement frame in this first acknowledgement frame;
Step S503, network coordinator PAN calculate the time T1 consumed in first time communication process after receiving the first acknowledgement frame;
Step S504, in order to make range finding more accurate, reduced function device RFD can send the second Frame again to network coordinator PAN after returning the first acknowledgement frame, the time that record sends;
Step S505, network coordinator PAN return the second acknowledgement frame to reduced function device RFD after receiving the second Frame, contain network coordinator PAN from receiving the time T4 consumed the second Frame to transmission second acknowledgement frame in this second acknowledgement frame;
Step S506, reduced function device RFD calculate the time T3 consumed in second time communication process after receiving the second acknowledgement frame;
Step S507, reduced function device RFD by the time T3 that consumes in second time communication process by the 3rd dataframe to network coordinator PAN;
Step S508, network coordinator PAN calculate the one way transmission time Tsingle of signal in communication process, and calculate the distance between network coordinator PAN and reduced function device RFD thus;
。
In ranging process between network coordinator PAN and reduced function device RFD, the Frame sent between network coordinator PAN and reduced function device RFD is all through pulse compression data processing.
Described network coordinator PAN regularly reconfigures the star network meeting IEEE802.15.4 standard, the reduced function device RFD newly entered in network coordinator PAN finding range is registered, solution registration is carried out to the reduced function device RFD exceeding network coordinator PAN finding range.
The present invention has following beneficial effect: the communication nest plate meeting IEEE802.15.4 is at present very ripe, by the channel energy detection (ED) in this standard, function and the time slot guarantees (GTS) such as link-quality instruction (LQI), carrier sense (CSMA), it is technical that the advantages such as ACK mechanism use radar range finding, significantly can reduce traditional range radar anti-interference and solve channel energy and to satisfy level of technical sophistication and spent cost, and merged the pulse compression technique of field of radar at IEEE802.15.4 standard physical layer after, can in raising radar average power, distance resolution is improved while improving operating distance, break through the operating distance of traditional Z igBee technology and add range capability and have a good application prospect.
Accompanying drawing explanation
Fig. 1 is stelliform connection topology configuration schematic diagram of the present invention.
Fig. 2 is flow chart of the present invention.
Fig. 3 is the range finding schematic flow sheet in embodiment;
The oscillogram that Fig. 4 extracts after being original transmitted waveform in embodiment and pulse compression;
Fig. 5 is the range finding curve in practical application.
Embodiment
Following according to Fig. 1 ~ Fig. 5, illustrate preferred embodiment of the present invention.
Fig. 1 is stelliform connection topology configuration schematic diagram, is configured with a network coordinator PAN and several reduced function device RFD in star network.
As shown in Figure 2, the invention provides a kind of pulse compression distance-finding method meeting IEEE802.15.4 standard Star Network, comprise following steps:
Step S1, define grid telegon PAN;
Network coordinator PAN main frame powers on, and is configured to the network coordinator PAN meeting IEEE802.15.4 standard;
Step S2, network coordinator PAN periodically broadcast beacon frame, to indicate the beginning of superframe;
Superframe is a kind of logical construction that organization network call duration time distributes that is used for, and the active period of main definitions communication and inactive period, in the inactive period, equipment can to enter sleep modes to reach the object of power saving;
Step S3, registration reduced function device RFD;
Reduced function device RFD is measured target, after reduced function device RFD powers on, namely the beacon frame of network coordinator PAN broadcast is have received to network coordinator PAN() by scanning search, registration request is sent to network coordinator PAN, after network coordinator PAN receives the registration request of reduced function device RFD, by the network address of reduced function device RFD stored in the object listing in network coordinator PAN, and be respectively reduced function device RFD by the ensuring mechanism time slot (GTS) meeting IEEE802.15.4 and distribute special communication time period, realize network associate and the clock synchronous of network coordinator PAN and reduced function device RFD,
The ensuring mechanism time slot GTS meeting IEEE802.15.4 is managed concentratedly by network coordinator PAN, is avoided the mutual interference of different target signal transmission in communication channel by the method for time-sharing multiplex;
Step S4, configuration star network;
When network coordinator PAN arranges and communicates between network coordinator PAN and registered reduced function device RFD, any equipment all needs after receiving Frame to send acknowledgement frame;
Step S5, communication and range finding;
Network coordinator PAN adopts timeslot-based CSMA/CA(to be with the Carrier Sense Multiple Access of conflict avoidance) channel access mechanisms and registered reduced function device RFD carry out channel competition access competing in the period, while completing transfer of data, the method for employing pulse compression completes the range finding between network coordinator PAN and reduced function device RFD;
Complete exchanges data and range finding with network coordinator PAN in the time slot of different reduced function device RFD assigned by oneself, and other reduced function device RFD is by intercepting channel energy and matching addresses keeps mourning in silence, and abdicates channel resource;
Step S6, network coordinator PAN judge whether to arrive Preset Time, if so, return and perform step S2, if not, return step S5.
Usually, step S5 can perform several cycles continuously, when after arrival Preset Time, network coordinator PAN will reenter step S2 and broadcast, Star Network is entered to prevent new reduced function device RFD, after the distance of existing reduced function device RFD and network coordinator PAN exceedes distance of finding range farthest, network coordinator PAN also will carry out solution registration to it, it is deleted from destination address list.
As shown in Figure 3, for single reduced function device RFD, the pulse compression distance-finding method between network coordinator PAN and reduced function device RFD comprises following steps:
Step S501, network coordinator PAN send the first Frame to RFD, and record the time now;
Step S502, reduced function device RFD return the first acknowledgement frame to network coordinator PAN after receiving the first Frame, contain reduced function device RFD from receiving the time T consumed the first Frame to transmission first acknowledgement frame in this first acknowledgement frame
2;
Step S503, network coordinator PAN calculate the time T consumed in first time communication process after receiving the first acknowledgement frame
1;
Step S504, in order to make range finding more accurate, reduced function device RFD can send the second Frame again to network coordinator PAN after returning the first acknowledgement frame, the time that record sends;
Step S505, network coordinator PAN return the second acknowledgement frame to reduced function device RFD after receiving the second Frame, contain network coordinator PAN from receiving the time T consumed the second Frame to transmission second acknowledgement frame in this second acknowledgement frame
4;
Step S506, reduced function device RFD calculate the time T consumed in second time communication process after receiving the second acknowledgement frame
3;
The time T that step S507, reduced function device RFD will consume in second time communication process
3by the 3rd dataframe to network coordinator PAN;
Step S508, network coordinator PAN calculate the one way transmission time T of signal in communication process
single, and calculate the distance between network coordinator PAN and reduced function device RFD thus;
In twice communication process, the time that data processing consumes is:
Add that signal in the time that space propagation is used is altogether:
In communication process, signal has had altogether at space propagation 4 times, so the transmission time of one way is:
Because the mode of pulse compression merges in the transmitting procedure of IEEE802.15.4 signal by the present invention, the method of pulse compression is adopted to process data in physical layer, such as represent binary data " 1 " with frequency modulation on pulse, mourn in silence and represent binary data " 0 ", network coordinator PAN is made to have very high precision when calculating the one-way time, thus when distance calculates, there is very high distance apportionment ratio, as shown in Figure 4, at time domain scale equally, pass through matched filtering, separate the mode processing modes such as linear frequency modulation, FM signal wide time large can be changed into very narrow pulse, improve antijamming capability and range accuracy.
The present invention has been applied on a kind of product of outdoor distance-measuring equipment, and Fig. 5 is the range finding record data of network coordinator PAN in star network No. 1 reduced function device RFD and No. 2 reduced function device RFD, and network coordinator PAN transmitting power is 20dBm.As can be seen from Figure 5, two reduced function device RFD are about 2000m place and 1700m place at distance network coordinator PAN respectively at the beginning, then mobile network's telegon PAN is close to No. 1 reduced function device RFD, draw back about 300m behind arrival No. 1 reduced function device RFD place, repeat near and finally get back to starting point, in whole process, network coordinator PAN can obtain the position of two reduced function device RFD and interference-free effectively.Range finding distance in these data greatly exceed the scope of application of the substandard ZigBee technology of conventional I EEE802.15.4, demonstrates validity of the present invention.
Although content of the present invention has done detailed introduction by above preferred embodiment, will be appreciated that above-mentioned description should not be considered to limitation of the present invention.After those skilled in the art have read foregoing, for multiple amendment of the present invention and substitute will be all apparent.Therefore, protection scope of the present invention should be limited to the appended claims.
Claims (6)
1. one kind meets the pulse compression distance-finding method of IEEE802.15.4 standard Star Network, it is characterized in that, configuration meets the star network of IEEE802.15.4 standard, network coordinator PAN and reduced function device RFD is comprised in star network, network coordinator PAN adopts the Carrier Sense Multiple Access CSMA/CA channel access mechanisms of timeslot-based band conflict avoidance and reduced function device RFD to carry out channel competition access, while completing transfer of data, the method for employing pulse compression completes the range finding between network coordinator PAN and reduced function device RFD.
2. meet the pulse compression distance-finding method of IEEE802.15.4 standard Star Network as claimed in claim 1, it is characterized in that, the star network that configuration meets IEEE802.15.4 standard comprises following steps:
Step S1, define grid telegon PAN;
Network coordinator PAN main frame powers on, and is configured to the network coordinator PAN meeting IEEE802.15.4 standard;
Step S2, network coordinator PAN periodically broadcast beacon frame;
Step S3, registration reduced function device RFD;
Step S4, configuration star network;
When network coordinator PAN arranges and communicates between network coordinator PAN and registered reduced function device RFD, any equipment all needs after receiving Frame to send acknowledgement frame.
3. meet the pulse compression distance-finding method of IEEE802.15.4 standard Star Network as claimed in claim 2, it is characterized in that, registration reduced function device RFD comprises following steps:
After the reduced function device RFD being positioned at network coordinator PAN finding range powers on, if reduced function device RFD have received the beacon frame that network coordinator PAN broadcasts, then send registration request to network coordinator PAN, after network coordinator PAN receives the registration request of reduced function device RFD, by the network address of reduced function device RFD stored in the object listing in network coordinator PAN, and be respectively reduced function device RFD by the ensuring mechanism time slot GTS meeting IEEE802.15.4 and distribute special communication time period, realize network associate and the clock synchronous of network coordinator PAN and reduced function device RFD.
4. meet the pulse compression distance-finding method of IEEE802.15.4 standard Star Network as claimed in claim 3, it is characterized in that, for single reduced function device RFD, the range finding adopting the method for pulse compression to complete between network coordinator PAN and reduced function device RFD comprises following steps:
Step S501, network coordinator PAN send the first Frame to RFD, and record the time now;
Step S502, reduced function device RFD return the first acknowledgement frame to network coordinator PAN after receiving the first Frame, contain reduced function device RFD from receiving the time T2 consumed the first Frame to transmission first acknowledgement frame in this first acknowledgement frame;
Step S503, network coordinator PAN calculate the time T1 consumed in first time communication process after receiving the first acknowledgement frame;
Step S504, in order to make range finding more accurate, reduced function device RFD can send the second Frame again to network coordinator PAN after returning the first acknowledgement frame, the time that record sends;
Step S505, network coordinator PAN return the second acknowledgement frame to reduced function device RFD after receiving the second Frame, contain network coordinator PAN from receiving the time T4 consumed the second Frame to transmission second acknowledgement frame in this second acknowledgement frame;
Step S506, reduced function device RFD calculate the time T3 consumed in second time communication process after receiving the second acknowledgement frame;
Step S507, reduced function device RFD by the time T3 that consumes in second time communication process by the 3rd dataframe to network coordinator PAN;
Step S508, network coordinator PAN calculate the one way transmission time Tsingle of signal in communication process, and calculate the distance between network coordinator PAN and reduced function device RFD thus;
。
5. meet the pulse compression distance-finding method of IEEE802.15.4 standard Star Network as claimed in claim 4, it is characterized in that, in ranging process between network coordinator PAN and reduced function device RFD, the Frame sent between network coordinator PAN and reduced function device RFD is all through pulse compression data processing.
6. meet the pulse compression distance-finding method of IEEE802.15.4 standard Star Network as claimed in claim 5, it is characterized in that, described network coordinator PAN regularly reconfigures the star network meeting IEEE802.15.4 standard, the reduced function device RFD newly entered in network coordinator PAN finding range is registered, solution registration is carried out to the reduced function device RFD exceeding network coordinator PAN finding range.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510592459.XA CN105162660A (en) | 2015-09-17 | 2015-09-17 | Pulse compression distance measurement method of star network conforming to IEEE802.15.4 standard |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510592459.XA CN105162660A (en) | 2015-09-17 | 2015-09-17 | Pulse compression distance measurement method of star network conforming to IEEE802.15.4 standard |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105162660A true CN105162660A (en) | 2015-12-16 |
Family
ID=54803420
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510592459.XA Pending CN105162660A (en) | 2015-09-17 | 2015-09-17 | Pulse compression distance measurement method of star network conforming to IEEE802.15.4 standard |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105162660A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080056722A1 (en) * | 2006-08-29 | 2008-03-06 | Hendrix John A | Binding methods and devices in a building automation system |
| CN101477720A (en) * | 2009-01-13 | 2009-07-08 | 许仁德 | Gate inhibition system |
| CN102778677A (en) * | 2012-05-29 | 2012-11-14 | 上海无线电设备研究所 | Long-distance pulse compression and short-distance pulse envelope detection delay measurement combined distance measuring method |
| CN104296607A (en) * | 2014-08-21 | 2015-01-21 | 上海无线电设备研究所 | Laser fuse enclosed feed testing device, testing system and testing method |
-
2015
- 2015-09-17 CN CN201510592459.XA patent/CN105162660A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080056722A1 (en) * | 2006-08-29 | 2008-03-06 | Hendrix John A | Binding methods and devices in a building automation system |
| CN101477720A (en) * | 2009-01-13 | 2009-07-08 | 许仁德 | Gate inhibition system |
| CN102778677A (en) * | 2012-05-29 | 2012-11-14 | 上海无线电设备研究所 | Long-distance pulse compression and short-distance pulse envelope detection delay measurement combined distance measuring method |
| CN104296607A (en) * | 2014-08-21 | 2015-01-21 | 上海无线电设备研究所 | Laser fuse enclosed feed testing device, testing system and testing method |
Non-Patent Citations (1)
| Title |
|---|
| 周磊: ""基于主动式标签的企业资产定位系统的设计与实现"", 《中国优秀硕士学位论文全文数据库信息科技辑》 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US12442888B2 (en) | Announcing UWB / NBA-UWB-MMS ranging rounds via narrowband-based advertisements | |
| US12323354B2 (en) | Techniques for hybridized ultra-wideband and narrowband signaling | |
| JP6241887B2 (en) | Peer-to-peer communication over restricted channels | |
| US8547870B2 (en) | Hybrid positioning mechanism for wireless communication devices | |
| JP6069665B2 (en) | Opportunistic resource sharing between devices | |
| WO2022016971A1 (en) | Wireless communication method and apparatus, base station, and tag device | |
| EP4130791A1 (en) | Announcing uwb / nba-uwb-mms ranging rounds via narrowband-based advertisements | |
| US9974035B2 (en) | Synchronization between low energy end point devices and parent devices in a time slotted channel hopping network | |
| US11310063B2 (en) | Ultra-low power mesh network | |
| CN115066010B (en) | Multi-level synchronous networking method for multi-channel lora monitoring system | |
| CN110958576B (en) | A UWB-based indoor positioning method and system | |
| CN104509141A (en) | Autonomous discovery for enhanced wifi devices | |
| CN108882147A (en) | A kind of wireless location system and fast pulldown method based on ultra wideband location techniques | |
| CN103327605B (en) | Based on the radio frequency positioning method of token ring and system under environment of internet of things | |
| WO2024140823A1 (en) | Information transmission method and communication device | |
| CN102572695B (en) | Positioning system based on ZigBee technology | |
| Bonafini et al. | Exploiting localization systems for LoRaWAN transmission scheduling in industrial applications | |
| CN104394587A (en) | Group range finding method based on a wireless dynamic self-organizing network | |
| WO2023207593A1 (en) | Method and device applied to ultra-wideband (uwb) system sensing measurement | |
| De Angelis et al. | TDoA based positioning using ultrasound signals and wireless nodes | |
| CN101282299A (en) | A Method of Measuring the Displacement Velocity of Moving Body in Multi-hop Network | |
| CN106604410A (en) | Method for realizing wireless self-organizing network building based on collision detection and competitive mode | |
| US9191894B2 (en) | Power saving for multi-hop communications | |
| CN102843164A (en) | Transmission time sequence control method of ultra-wide band indoor positioning system | |
| CN105162660A (en) | Pulse compression distance measurement method of star network conforming to IEEE802.15.4 standard |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20151216 |
|
| WD01 | Invention patent application deemed withdrawn after publication |