CN109951252A - A kind of overlength radio frames - Google Patents
A kind of overlength radio frames Download PDFInfo
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- CN109951252A CN109951252A CN201910111841.2A CN201910111841A CN109951252A CN 109951252 A CN109951252 A CN 109951252A CN 201910111841 A CN201910111841 A CN 201910111841A CN 109951252 A CN109951252 A CN 109951252A
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Abstract
The present invention relates to communication technique field, specially a kind of overlength radio frames, including leading, data frame, the data frame packet contain frame head and data；Further include be inserted in after frame head and among data in lead, led after being inserted into after the data；It is led in described as periodical insertion.Wherein, led in described and after lead as known array, and in the insertion point position of data frame it is known that the position is calculated by receiver obtains.Be inserted into described lead and after lead after the number of data block keep variable, the length of data block is kept fixed.The present invention is on the basis of existing Internet of Things small wireless frame, it is led with after by being led in insertion, so that in ultra-narrow band transmission process, the brings clocking errors such as radio frames can overcome due to interfering, clock is unstable guarantee that the wireless content frame of overlength can be demodulated correctly.Meanwhile requirement to clock can be reduced, to reduce the cost of system.
Description
Technical field
The present invention relates to communication technique field, specially a kind of overlength radio frames.
Background technique
In existing Internet of Things small wireless (non-cellular) system, including LoRa, Sigfox, Zigbee, Bluetooth and
In BLE system, leading (preamble)+frame head (variable data, regular length)+data (variable data, variable length is generallyd use
Degree, general length specified by frame originating point information) format.By detecting the phase information of known pilot (preamble), after guidance
The demodulation of continuous data.
Current this frame format is in the higher situation of data rate, and the length of frame is shorter, the phase of frame head and data information
Position and leading phase are consistent substantially, restore frame head sum number so as to correctly demodulate by using leading phase information
It is believed that breath.
In super narrowband systems, since the rate of radio frames substantially reduces, so that sending same quantity of data, need more
The long time.During this period, due to by clock drift, the influence of the factors such as space interference so that subsequent frame head and
Relative to leading phase obvious offset occurs for the phase of data information, to can not pass through leading phase demodulating.
Summary of the invention
The purpose of the present invention is to provide a kind of overlength radio frames, it is intended to solve existing Internet of Things small wireless (non-cellular) system
In system, based on frame data transmission (in the case where non-stream format), due to using super narrow-band technologies, cause frame data elongate and
The problem of clocking error of introducing, data rate can not correctly demodulate initial data caused by drifting about.
The invention provides the following technical scheme: a kind of overlength radio frames, including leading, data frame known to sequence, it is described
Data frame packet contains frame head, data；
Further include be inserted in after frame head and among data in lead, led after being inserted into after the data, for correctly demodulate
Overlength is wireless content frame.
Optionally, for a kind of overlength radio frames, the demodulation overlength radio frames, comprising steps of
(1) be arranged in described lead with it is described after the sequence led；
(2) be arranged led in described with it is described after the position of insertion point led；
(3) searcher receiver obtain led in described with it is described after the information led；
(4) receiver will obtain information compared with the leading information in step (3), obtain frame using the method for interpolation
Intermediate each phase for receiving symbol；And
(5) the correct demodulation of receiver guidance.
Optionally, for a kind of overlength radio frames, it is described in lead with it is described after the sequence led be known array.
Optionally, for a kind of overlength radio frames, it is described in lead with it is described after the position of insertion point led be
Know position.
Optionally, for a kind of overlength radio frames, it is described in lead as periodical insertion.
Optionally, for a kind of overlength radio frames, be inserted into described lead with it is described after lead after data block
Number keeps variable, and the length of the data block is kept fixed.
Optionally, for a kind of overlength radio frames, the frame head is variable data and regular length.
Optionally, for a kind of overlength radio frames, the overlength radio frames >=128 bytes.
Compared with prior art, beneficial effects of the present invention at least that:
The present invention is led with after on the basis of existing Internet of Things small wireless frame by leading in insertion, so that passing in ultra-narrow band
During defeated, the brings clocking errors such as radio frames can overcome due to interfering, clock is unstable guarantee the wireless content frame of overlength
It can correctly be demodulated.Meanwhile requirement to clock can be reduced, to reduce the cost of system.
Detailed description of the invention
Fig. 1 is existing normal frames format chart；
Fig. 2 is a kind of situation explanatory diagram of existing normal frames；
Fig. 3 is overlength wireless frame structure schematic diagram in the embodiment of the present invention；
Fig. 4 is a kind of situation explanatory diagram of overlength radio frames in the embodiment of the present invention.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
In order to better understand the present invention, referring to FIG. 1, Fig. 1 is existing normal frames format chart；Fig. 2 is existing normal frames
Format description figure.
As shown in figure 1, including it is leading, frame head and data, wherein leading (preamble) for example can be known array, it is described
Frame head for example can be variable data, regular length, and the data for example can be variable data, variable-length.
Referring to FIG. 2, inventors have found that under short frame condition (i.e. situation A), the phase and pilot phase of frame head and data
It is close, it can be used for demodulating；However under long frame condition (i.e. situation B), the phase and preamble phase of frame head and data occur compared with
Big offset, has been not used to demodulate.
In addition, for example in LoRa system, it is only leading at present.It is also only leading at present in Sigfox system.
Based on this, referring to FIG. 3, the present invention provides a kind of technical solution: a kind of overlength radio frames, including known to sequence
Leading, data frame, the data frame packet contain frame head and data；Further include be inserted in after frame head and among data in lead, be inserted into
It is led after after the data, for correctly demodulating the wireless content frame of overlength.
In the present invention, the overlength radio frames refer to the case where being more than or equal to 128 byte, that is, think to belong to " overlength "
This definition.
Specifically, the demodulation overlength radio frames, comprising steps of
(1) be arranged in described lead with it is described after the sequence led, such as the sequence is known array；
(2) be arranged led in described with it is described after the position of insertion point led, such as the position is the known location determined；
(3) searcher receiver obtain led in described with it is described after the information led, which includes the sequence in above-mentioned steps
Information and location information；
(4) receiver will obtain information compared with the leading information in step (3), obtain frame using the method for interpolation
Intermediate each phase for receiving symbol；And
(5) the correct demodulation of receiver guidance.
It leads to lead after in for example, and identical random sequence can be used as leading, the production method of random sequence can
Think the method that any receiver anticipated that in the prior art.
In one embodiment of the invention, lead in described to be periodically insertion.Then the data can be split,
Data after cutting still can be variable data, and length is fixed.
Such as be inserted into a known symbol and lead between every 8 bytes, the data of 256 bytes can be split as 32
The short data of a 8 byte has in one between each short data and leads, for demodulating.
In one embodiment of the invention, be inserted into it is described in lead with it is described after lead after data block number holding can
Become, the length of data block is kept fixed.
In one embodiment of the invention, the frame head is variable data and regular length.
As the preferred embodiment of the invention: the present invention removes on the basis of existing frame and uses traditional leading (preamble)
Except, after frame head and among data, be periodically inserted in lead (mid-amble), after data be inserted into after lead (post-
Amble), wherein in lead and rear leading code is all known array, and known to the position of the insertion point of frame.Receiver is by again
The information led with after is led in secondary search, by comparing with leading information (how receiver can be received, this field is belonged to
What technical staff was understood thoroughly, this will not be repeated here), each phase for receiving symbol among frame is obtained using the method for interpolation, from
And instruct correctly demodulation.Wherein, it is known array that the content led with after is led in, and insertion position is that receiver can pass through calculating
It obtains.Number by leading the data block after leading with after in insertion still keeps can be changed, and the length of data block keeps solid
It is fixed.
Referring to FIG. 4, Fig. 4 shows the case where overlength radio frames as provided in the present invention may face, it is being inserted into
In lead and after lead in the case where, due to data phase can by it is leading, in lead and after the phase calculation led obtain, thus may be used
Even if can also correctly restore frame head and data to guarantee in cases of a disturbance or in the case where inaccurate clock
Content guarantees that the content of overlength radio frames can be demodulated correctly.Meanwhile requirement to clock can be reduced, to reduce and be
The cost of system.
Further, end can also sent and received using the clock system of superhigh precision, then combined of the invention
Overlength radio frames significantly more efficient can ensure that the content of overlength radio frames can be demodulated correctly.
In conclusion a kind of overlength radio frames provided by the invention, including leading, data frame known to sequence, the number
It include frame head and data according to frame；Further include be inserted in after frame head and among data in lead, led after being inserted into after the data, use
In the correctly demodulation wireless content frame of overlength.The present invention is on the basis of existing Internet of Things small wireless frame, by leading with after in insertion
It leads, so that in ultra-narrow band transmission process, the brings clocking errors such as radio frames can overcome due to interfering, clock is unstable,
Guarantee that the wireless content frame of overlength can be demodulated correctly.Meanwhile requirement to clock can be reduced, thus reduce system at
This.
It although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with
A variety of variations, modification, replacement can be carried out to these embodiments without departing from the principles and spirit of the present invention by understanding
And modification, the scope of the present invention is defined by the appended.
Claims (8)
1. a kind of overlength radio frames, it is characterised in that: including leading known to sequence, data frame, the data frame packet contains frame head
And data；
Further include be inserted in after frame head and among data in lead, led after being inserted into after the data, for correctly demodulate overlength
Wireless content frame.
2. a kind of overlength radio frames according to claim 1, it is characterised in that: the demodulation overlength radio frames, including step
It is rapid:
(1) be arranged in described lead with it is described after the sequence led；
(2) be arranged led in described with it is described after the position of insertion point led；
(3) searcher receiver obtain led in described with it is described after the information led；
(4) receiver will obtain information compared with the leading information in step (3), be obtained among frame using the method for interpolation
Each phase for receiving symbol；And
(5) the correct demodulation of receiver guidance.
3. a kind of overlength radio frames according to claim 2, it is characterised in that: led in described with it is described after the sequence led be
Known array.
4. a kind of overlength radio frames according to claim 2, it is characterised in that: led in described with it is described after the insertion point led
Position be known location.
5. a kind of overlength radio frames according to claim 1, it is characterised in that: led in described as periodical insertion.
6. a kind of overlength radio frames according to claim 1, it is characterised in that: insertion it is described in lead with it is described after lead after
The number of data block keep variable, the length of the data block is kept fixed.
7. a kind of overlength radio frames according to claim 1, it is characterised in that: the frame head is variable data and fixed length
Degree.
8. a kind of overlength radio frames as claimed in any of claims 1 to 7, it is characterised in that: the overlength is wireless
Frame >=128 bytes.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910111841.2A CN109951252A (en) | 2019-02-12 | 2019-02-12 | A kind of overlength radio frames |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910111841.2A CN109951252A (en) | 2019-02-12 | 2019-02-12 | A kind of overlength radio frames |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022022183A1 (en) * | 2020-07-29 | 2022-02-03 | 天地融科技股份有限公司 | Data transmission method and apparatus |
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| CN1604662A (en) * | 2003-09-29 | 2005-04-06 | 凯明信息科技股份有限公司 | Method and equipment for detecting middle guiding code sequence in TD-SCDMA system |
| CN103209043A (en) * | 2012-01-11 | 2013-07-17 | 华为技术有限公司 | Method for requesting for using midamble in data transmission and site |
| WO2018094366A1 (en) * | 2016-11-20 | 2018-05-24 | Qualcomm Incorporated | Signalling of an indication of the interval between mid-ambles |
| CN108352935A (en) * | 2015-11-09 | 2018-07-31 | 高通股份有限公司 | Use when being sent in transmitting wireless device with signal to cyclic shift diversity |
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2019
- 2019-02-12 CN CN201910111841.2A patent/CN109951252A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1604662A (en) * | 2003-09-29 | 2005-04-06 | 凯明信息科技股份有限公司 | Method and equipment for detecting middle guiding code sequence in TD-SCDMA system |
| CN103209043A (en) * | 2012-01-11 | 2013-07-17 | 华为技术有限公司 | Method for requesting for using midamble in data transmission and site |
| CN108352935A (en) * | 2015-11-09 | 2018-07-31 | 高通股份有限公司 | Use when being sent in transmitting wireless device with signal to cyclic shift diversity |
| WO2018094366A1 (en) * | 2016-11-20 | 2018-05-24 | Qualcomm Incorporated | Signalling of an indication of the interval between mid-ambles |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022022183A1 (en) * | 2020-07-29 | 2022-02-03 | 天地融科技股份有限公司 | Data transmission method and apparatus |
| US11962365B2 (en) | 2020-07-29 | 2024-04-16 | Tendyron Corporation | Data transmission method and apparatus |
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