GNSS localization method and device is simplified for internet-of-things terminal
Technical field
The invention belongs to Internet of Things field of locating technology, are related to a kind of GNSS localization method and energy for internet-of-things terminal
Enough realize the device of this method.
Background technique
A large amount of internet-of-things terminal has the requirement of positioning, if you need to assets to be traced, shared bicycle, and wearable device,
Intelligent common equipment (such as well lid, the moveable equipment of dustbin, etc.) etc..Wherein many application scenarios are outdoor spacious
Area, for example, animal husbandry is used to track the locator of cattle and sheep, the recycling of the tracking of well lid dustbin etc., high capacity cell is tracked,
Tracking of dock container etc..
The GNSS positioning chip of consumer electronics market currently on the market be all designed for mobile phone, personal navigation equipment and
The fields such as automobile, product form are GNSS chipsets, perhaps individually GNSS chip SOC or are integrated in wireless communication core
Inside piece.This kind of GNSS positioning chip needs individually to buy and assemble we term it " all-round GNSS " chip.These locating cores
Flake products are fully functional powerful (supporting various modes and constellation), performance it is good (such as sensitivity, precision and positioning time, in real time
Property), but it is at high cost, power consumption is big, using complexity, and needs very big storage to store code and data.These features make
Obtain the location requirement that existing all-round GNSS chip is not suitable for many internet-of-things terminals.Internet-of-things terminal needs positioning chip to have
There are low as far as possible power consumption and alap cost, but positioning accuracy, sensitivity, positioning time and real-time are wanted without height
(such as just meeting the requirements within 100 meters) is asked, and is not had to and is wirelessly communicated while occurring.And have no in the prior art can
Positioning chip with the demand.
Summary of the invention
To solve the above problems, the invention discloses can be used in internet-of-things terminal to simplify GNSS localization method and dress
Set, aim at as Internet of Things applied customization, be suitable for it is this kind of of less demanding to positioning performance and to cost, power consumption, storage, ease for use
Exigent internet-of-things terminal.
In order to achieve the above object, the invention provides the following technical scheme:
GNSS localization method is simplified for internet-of-things terminal, is included the following steps:
The radio frequency unit and the GNSS signal of baseband circuit storage a period of time in Internet of Things communication chip are opened in advance, so
After close the radio frequency unit and baseband circuit, then carry out with processor capture and search star and positioning.
Further, specifically comprise the following steps:
(1) internet-of-things terminal receives Location Request from application program;
(2) internet-of-things terminal checks in terminal whether have effective GNSS ephemeris, such as otherwise passes through Internet of Things communication chip
Download GNSS ephemeris;
(3) Internet of Things communication pattern is exited;
(4) radio frequency unit and baseband circuit in Internet of Things communication chip are opened, GNSS mode is arranged to;
(5) it collects the GNSS data in a period of time and is stored in a storage unit;
(6) radio frequency unit and baseband circuit being opened in step (4) are closed;
(7) capture is carried out to the data stored in step (5) into storage unit with processor and searches star, generate measurement data;
(8) location information current with processor computing terminal, the location information include at least one in following information
Item is multinomial: position, speed, time.
Further, described a period of time is N milliseconds.
GNSS positioning device is simplified for internet-of-things terminal, simplifies GNSS for internet-of-things terminal for realizing above-mentioned
Localization method, radio frequency unit, ADC AD conversion unit, baseband circuit, storage unit in inclusion connected network communication chip and
General processor, the radio frequency unit, ADC AD conversion unit, baseband circuit, storage unit, general processor are sequentially connected.
It further, also include GNSS specialized hardware, the GNSS specialized hardware is arranged in Internet of Things communication chip, packet
Containing any one or a few in following hardware:
GNSS special-purpose radio-frequency unit, GNSS special ADC AD conversion unit, the dedicated baseband circuit unit of GNSS, GNSS are special
With processing hardware cell and GNSS specific store.
Further, include the dedicated baseband circuit unit of GNSS, the dedicated baseband circuit unit of GNSS respectively with ADC mould
Number converting unit is connected with storage unit.
Compared with prior art, the invention has the advantages that and the utility model has the advantages that
It, can be in internet-of-things terminal chip (such as NB-IoT core 1. the present invention provides one kind to simplify GNSS localization method
Piece, eMTC chip, NB-IoT/eMTC dual-mode chip, mMTC chip etc.) in realize GNSS location technology, dramatically save into
This (storage, chip area), reduces power consumption, can adapt to the location requirement of many Internet of Things.
2. be based on the method, the present invention can in Internet of Things communication chip hardware realization, it is right without carrying out hardware modification
In the internet-of-things terminal of not location requirement, it is only necessary to turn off GNSS function in software setting, without any unwanted
Hardware or software cost, do not increase extra cost.
3. the present invention also provides multiple hardwares implementations, as needed, original Internet of Things can be partly or entirely used
Communication chip, settable multiple GNSS specialized hardwares, implementation is versatile and flexible, applied widely.
Detailed description of the invention
Fig. 1 is to simplify GNSS localization method implementation flow chart provided by the present invention for internet-of-things terminal.
Fig. 2 is the signal processing schematic diagram under real-time (online) positioning method.
Fig. 3 is the signal processing schematic diagram under non real-time (offline) positioning method.
Fig. 4 simplifies GNSS positioning device structure schematic diagram for internet-of-things terminal for what embodiment two provided.
Fig. 5 simplifies GNSS positioning device structure schematic diagram for internet-of-things terminal for what embodiment three provided.
Fig. 6 simplifies GNSS positioning device structure schematic diagram for internet-of-things terminal for what example IV provided.
Fig. 7 simplifies GNSS positioning device structure schematic diagram for internet-of-things terminal for what embodiment five provided.
Fig. 8 simplifies GNSS positioning device structure schematic diagram for internet-of-things terminal for what embodiment six provided.
Fig. 9 simplifies GNSS positioning device structure schematic diagram for internet-of-things terminal for what embodiment seven provided.
Specific embodiment
Technical solution provided by the invention is described in detail below with reference to specific embodiment, it should be understood that following specific
Embodiment is only illustrative of the invention and is not intended to limit the scope of the invention.In addition, step shown in the flowchart of the accompanying drawings
Suddenly it can execute in a computer system such as a set of computer executable instructions, although also, showing in flow charts
Logical order, but in some cases, it can be with the steps shown or described are performed in an order that is different from the one herein.
Embodiment one:
It should be noted that including radio frequency unit, ADC AD conversion unit, base band in existing Internet of Things communication chip
Circuit, storage unit and general processor (DSP).Therefore based on our available GNSS signals of Internet of Things communication chip.
Innovation of the present invention is to carry out searching star and positioning using the method for processed offline: first passing through open Internet of Things Network Communication core in advance
Radio frequency unit and baseband circuit in piece store the GNSS signal of one section of short time, are then shut off the radio frequency and baseband circuit of front end
Part, then carry out capture with processor and search star and positioning.Here radio frequency unit and baseband circuit can be in communication chip
Existing element is also possible to the related hardware being specially arranged in communication chip for GNSS positioning function.
More specifically, what this example provided simplifies GNSS localization method for internet-of-things terminal, in software realization
Its complete procedure is as shown in Figure 1, include the following steps:
(1) internet-of-things terminal receives Location Request from application program.
(2) internet-of-things terminal checks in terminal whether have effective GNSS ephemeris, such as otherwise passes through Internet of Things communication chip
(such as NB-IoT chip) downloads GNSS ephemeris.
(3) Internet of Things communication pattern is exited.
(4) radio frequency unit and baseband circuit in Internet of Things communication chip are opened, GNSS mode is arranged to.Here radio frequency
Unit and baseband circuit can be existing element in communication chip, be also possible in communication chip be that GNSS positioning function is special
The related hardware of door setting.
(5) it collects N milliseconds of GNSS data and is stored in a storage unit.Here storage unit can be communication chip
In existing element, be also possible to the related hardware being specially arranged in communication chip for GNSS positioning function.
(6) radio frequency unit and baseband circuit being opened in step (4) are closed.
(7) capture is carried out to the data stored in step (5) into storage unit with processor and searches star, generate measurement data.
(8) (including one in Position, Velocity and Time or more with the current location information of processor computing terminal
).
Storage GNSS data and processing GNSS data process in real time signal processing mode is as shown in Fig. 2, and of the invention
The process of middle storage GNSS data and processing GNSS data is not as shown in figure 3, have particular/special requirement to time delay and processing speed.We
The not high feature of Internet of Things application positioning requirement of real-time is utilized in method, using processed offline mode, with the processor long period
Processing exchange required sensitivity for.Since in the application of many Internet of Things, GNSS positioning and Internet of Things Network Communication (are wirelessly connect
Receipts machine and transmitter) it does not need to occur simultaneously, some or all of Internet of Things communication chip can be used in GNSS location technology
Hardware cell (including radio frequency, analog to digital converter ADC, baseband processing circuitry, storage unit, processor/DSP etc.).Very
Obviously, existing hardware condition (as shown in Figure 4) in Internet of Things communication chip is only relied on, is just enough to realize the method for the present invention, i.e.,
Completely using whole signal processing related hardwares of Internet of Things wireless communication chips (including radio frequency, base band, storage and general procedure
Device, etc.).But as needed, or in order to provide preferably performance, it also can partially use or not use Internet of Things channel radio completely
Believe the hardware in chip, the specialized hardware for realizing GNSS is set.It is directed to hardware embodiment one in embodiments below
One expansion explanation.
Embodiment two:
This example provides what is realized in a manner of close to zero cost in Internet of Things communication chip to simplify GNSS positioning device,
I.e. completely using related hardware (including radio frequency, analog to digital converter ADC, the Base-Band Processing in Internet of Things wireless communication chips
Circuit, storage unit, processor/DSP), hardware structure is as shown in figure 4, the as existing presence of Internet of Things wireless communication chips
Sequentially connected radio frequency unit, ADC AD conversion unit, baseband circuit, storage unit and general processor (DSP).This
Example is not provided with GNSS specialized hardware, it is only necessary to realize the non real-time off-line method provided in embodiment one in software.This example provides
Positioning device, i.e., existing Internet of Things communication chip, without doing additional transformation to hardware, cost is extremely cheap.
Embodiment three:
This example provides what is realized in a manner of close to zero cost in Internet of Things communication chip to simplify GNSS positioning device,
Its hardware structure as shown in figure 5, only be arranged the dedicated baseband circuit unit of GNSS, the dedicated baseband circuit unit of GNSS respectively with Internet of Things
Existing ADC AD conversion unit is connected with storage unit in net wireless communication chips, and is realized in embodiment one in software
The non real-time off-line method provided.The positioning device that this example provides, increases minimal amount of in existing Internet of Things communication chip
GNSS specialized hardware, cost are extremely low.
Example IV:
This example provides what is realized in a manner of low cost in Internet of Things communication chip to simplify GNSS positioning device, hard
Part framework is as shown in fig. 6, be only arranged the dedicated baseband circuit unit of GNSS and GNSS specific store, and realize embodiment in software
The non real-time off-line method provided in one.Wherein, the dedicated baseband circuit unit of GNSS is respectively and in Internet of Things wireless communication chips
Existing ADC AD conversion unit is connected with storage unit, and it is single that Yao Shixian GNSS specific store need to expand or increase original storage
First circuit.The positioning device that this example provides, increases minimal amount of GNSS specialized hardware in existing Internet of Things communication chip, at
This is extremely low.
Embodiment five:
This example provides what is realized in a manner of low cost in Internet of Things communication chip to simplify GNSS positioning device, hard
Part framework is as shown in fig. 7, be arranged GNSS dedicated processes hardware cell and GNSS specific store, and realize embodiment one in software
The non real-time off-line method of middle offer.Wherein, Yao Shixian GNSS specific store need to expand or increase original storage unit circuit,
GNSS dedicated processes hardware cell is connect with storage unit.The positioning device that this example provides, in existing Internet of Things communication chip
The a small amount of GNSS specialized hardware of middle increase, it is low in cost.
Embodiment six:
This example provides what is realized in a manner of low cost in Internet of Things communication chip to simplify GNSS positioning device, hard
Part framework as shown in figure 8, the dedicated baseband circuit unit of setting GNSS, GNSS dedicated processes hardware cell and GNSS specific store,
And the non real-time off-line method provided in embodiment one is realized in software.Wherein, Yao Shixian GNSS specific store need to expand or
Increase original storage unit circuit, the dedicated baseband circuit unit of GNSS respectively with existing ADC in Internet of Things wireless communication chips
AD conversion unit is connected with storage unit, and GNSS dedicated processes hardware cell is connect with storage unit.The positioning that this example provides
Device increases a small amount of GNSS specialized hardware in existing Internet of Things communication chip, low in cost.
Embodiment seven:
This example provides what is realized in a manner of low cost in Internet of Things communication chip to simplify GNSS positioning device, hard
Part framework as shown in figure 9, setting GNSS special-purpose radio-frequency unit, GNSS special ADC unit, the dedicated baseband circuit unit of GNSS,
GNSS dedicated processes hardware cell and GNSS specific store, and the non real-time offline side provided in embodiment one is provided in software
Method.Wherein, Yao Shixian GNSS specific store need to expand or increase original storage unit circuit, GNSS special-purpose radio-frequency unit, GNSS
The dedicated baseband circuit unit of special ADC unit, GNSS is sequentially connected, and the dedicated baseband circuit unit of GNSS is connect with storage unit,
GNSS dedicated processes hardware cell is connect with storage unit.The positioning device that this example provides, in existing Internet of Things communication chip
The a small amount of GNSS specialized hardware of middle increase, it is low in cost.
Two-embodiment of above embodiments seven only there is provided it is several be easier to realize simplify GNSS positioning device, according to
It needs, can choose several correlation units (radio frequency unit, ADC AD conversion unit, baseband circuit, storage unit and general
Processor (DSP)) one of or any several setting GNSS specialized hardwares.Dedicated GNSS hardware, which is added, can reinforce Internet of Things
Network termination positioning function or performance (for example supporting to be positioned with GPS and big-dipper satellite simultaneously).
The technical means disclosed in the embodiments of the present invention is not limited only to technological means disclosed in above embodiment, further includes
Technical solution consisting of any combination of the above technical features.It should be pointed out that for those skilled in the art
For, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications are also considered as
Protection scope of the present invention.