CN102547745A - Frequency control method and device of wireless video monitoring system - Google Patents
Frequency control method and device of wireless video monitoring system Download PDFInfo
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- CN102547745A CN102547745A CN2012100144189A CN201210014418A CN102547745A CN 102547745 A CN102547745 A CN 102547745A CN 2012100144189 A CN2012100144189 A CN 2012100144189A CN 201210014418 A CN201210014418 A CN 201210014418A CN 102547745 A CN102547745 A CN 102547745A
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Abstract
The invention discloses a frequency control method of a wireless video monitoring system, which comprises the steps of: obtaining a working frequency of a rear end commanding center receiving unit; sending a working frequency correction instruction to a front end communication device sending unit according to the obtained working frequency of the rear end commanding center receiving unit; and regulating the working frequency of the front end communication device sending unit according to the sent working frequency correction instruction. In addition, the invention discloses a frequency control device of the wireless video monitoring system, which comprises a working frequency obtaining module, a rear end sending module and a front end control module. According to the frequency control method and device of the wireless video monitoring system, provided by the invention, through controlling the working frequency of a front end communication device, the condition that a rear end commanding center must adopt same frequency points as the front end communication device in a one-to-one correspondence manner is avoided, so that the quantity of the rear end commanding center receiving units for receiving video monitoring information and occupied frequency resources are greatly reduced.
Description
Technical field
The present invention relates to the wireless video monitoring technical field, relate in particular to a kind of wireless video monitoring system control method for frequency and device.
Background technology
In wireless video monitoring system, the bandwidth that video transmission takies is bigger at present, and front end video transmitting element adopts the fixed frequency point, and backstage command centre receiving element must adopt and the identical Frequency point of front end communication equipment transmitting element.If wireless video monitoring system has a plurality of front end transmitting elements, it is corresponding that then must there be the receiving element of equal number the rear end, and must adopt same frequency correspondingly.When wireless video monitoring system is larger; System will take a lot of frequency resources, when for example system comprises 10 video monitoring front-end unit, just need take 10 Frequency points; The rear end will have 10 receiving elements accordingly simultaneously, and 10 secondary reception antennas.Therefore, present wireless video monitoring system exists complex structure, construction cost is high, frequency resource takies many and disturbed unfavorable factor such as probability increase.
Summary of the invention
For solving said structure complicacy and the many problems of acquisition frequency resource that wireless video monitoring system exists, the invention discloses a kind of wireless video monitoring system control method for frequency and device.
A kind of wireless video monitoring system control method for frequency may further comprise the steps:
Obtain the operating frequency of rear end command centre receiving element;
According to the operating frequency of the rear end command centre receiving element that obtains, forward end communication equipment transmitting element sends the operating frequency modify instruction;
According to the operating frequency modify instruction that sends, the operating frequency of adjustment front end communication equipment transmitting element.
Compared with prior art; Wireless video monitoring system control method for frequency provided by the present invention; Through control to front end communication equipment work frequency; Avoid rear end command centre must adopt the situation of same frequency point correspondingly with front end communication equipment, made the rear end command centre to be used for the receiving element quantity of receiver, video monitor message and shared frequency resource reduces greatly.Particularly when system scale bigger, when having more front end communication equipment, can effectively reduce the system scale and the construction cost of rear end command centre, improve the service efficiency of frequency resource.
A kind of wireless video monitoring system frequency control apparatus comprises operating frequency acquisition module, rear end sending module and front-end control module;
Said operating frequency acquisition module is used to obtain the operating frequency of rear end command centre receiving element;
Said rear end sending module is used for the operating frequency according to the rear end command centre receiving element that obtains, and forward end communication equipment transmitting element sends the operating frequency modify instruction;
Said front-end control module is used for according to the operating frequency modify instruction that sends, the operating frequency of adjustment front end communication equipment transmitting element.
Compared with prior art, wireless video monitoring system frequency control apparatus provided by the present invention can be realized the control to front end communication equipment work frequency, makes the receiving element quantity of rear end command centre and shared frequency resource all reduce greatly.
Description of drawings
Fig. 1 is the schematic flow diagram of wireless video monitoring system control method for frequency of the present invention;
Fig. 2 is the structural representation of wireless video monitoring system frequency control apparatus of the present invention.
Embodiment
Be further set forth the present invention technological means of being taked and the effect that obtains,,, know and complete description the wireless video monitoring system control method for frequency proposed by the invention and the technical scheme of device below in conjunction with accompanying drawing and preferred embodiment.
See also Fig. 1, be the schematic flow diagram of wireless video monitoring system control method for frequency of the present invention.Wireless video monitoring system control method for frequency of the present invention may further comprise the steps:
S101 obtains the operating frequency of rear end command centre receiving element;
Front end communication equipment transmitting element adopts alien frequencies, and promptly each front end communication equipment transmitting element of wireless video monitoring system adopts different frequencies, but must be corresponding with the frequency of rear end command centre receiving element.For front end communication equipment transmitting element is carried out FREQUENCY CONTROL, need obtain the operating frequency of rear end command centre receiving element earlier.
Formulate the communication protocol of wireless video monitoring system, make rear end command centre and front end communication equipment together through the wireless network organic connections.Communication protocol is the important component part that realizes FREQUENCY CONTROL, and communicating by letter between rear end command centre and the front end communication equipment must meet the requirement of these stipulations, can accomplish parameter modifications such as FREQUENCY CONTROL.The structure of communication protocol comprises contents such as the address, command word, command context, verification, frame end position of start of frame bits, front end communication equipment transmitting element.
Communication protocol comprises system queries and system is provided with two parts.System queries can be inquired about information such as the operating state, coding mode, communication frequency of a certain front end communication equipment, and rear end command centre obtains the operating state of a certain front end communication equipment through query statement, so that do the scheduling of more optimizing.System is provided with the parameters such as power of the working channel that can revise a certain front end communication equipment, operating frequency, transmitting element.
S102 is according to the operating frequency of the rear end command centre receiving element that obtains, and forward end communication equipment transmitting element sends the operating frequency modify instruction;
After the operating frequency of having obtained rear end command centre receiving element; When needs were revised the operating frequency of a certain front end communication equipment transmitting element, rear end command centre sent an instruction of revising the front end communication equipment transmitting element operating frequency of a certain address approximately according to system specifications.
Preferably, before rear end command centre forward end communication equipment transmitting element sent the operating frequency modify instruction, rear end command centre needed earlier the operating state of this front end communication equipment transmitting element to be inquired about.When the state parameters such as operating frequency of a certain front end communication equipment transmitting element need be inquired about by rear end command centre; Send the instruction of the front end communication equipment transmitting element working status parameter of an a certain address of inquiry according to system specifications; After front end communication equipment converts the operating state query statement into be suitable for front end communication equipment transmitting element identification form, the working status parameter of front end communication equipment transmitting element is sent to rear end command centre receiving element.
S103 adjusts the operating frequency of front end communication equipment transmitting element according to the operating frequency modify instruction that sends.
Preferably, front end communication equipment converts the operating frequency modify instruction into be suitable for the identification of front end communication equipment transmitting element form, according to the operating frequency modify instruction after the format conversion, and the operating frequency of adjustment front end communication equipment transmitting element.
Rear end command centre is according to the needs of command scheduling; When needing the video information of a certain front end communication equipment of key monitoring; This front end communication priority facility for the highest is the frequency remotely modifying of this front end communication equipment transmitting element and the identical operating frequency of rear end command centre receiving element at this moment.When command centre temporarily need not monitor the video information of a certain front end communication equipment; This front end communication priority facility is minimum; Be set to rear end command centre receiving element different working frequency the frequency of this front end communication equipment transmitting element is long-range this moment, also is reserve frequency.
Preferably, if the operating frequency of adjusted front end communication equipment transmitting element is identical with the operating frequency of rear end command centre receiving element, then front end communication equipment transmitting element is sent to rear end command centre receiving element with video information; If the operating frequency of adjusted front end communication equipment transmitting element is different with the operating frequency of rear end command centre receiving element, then store the video information that front end communication equipment is gathered.
Compared with prior art; Wireless video monitoring system control method for frequency provided by the present invention; Through control to front end communication equipment transmitting element operating frequency; Avoid rear end command centre receiving element must adopt the situation of same frequency point correspondingly with front end communication equipment transmitting element, made the quantity of rear end receiving element and shared frequency resource reduce greatly.Particularly when system scale bigger, when having more front end communication equipment, can effectively reduce back-end system scale and construction cost, improve the service efficiency of frequency resource.
See also Fig. 2, be the structural representation of wireless video monitoring system frequency control apparatus of the present invention.Wireless video monitoring system frequency control apparatus of the present invention comprises operating frequency acquisition module 201, rear end sending module 202 and front-end control module 203;
Said operating frequency acquisition module 201 is used to obtain the operating frequency of rear end command centre receiving element;
For front end communication equipment transmitting element is carried out FREQUENCY CONTROL, operating frequency acquisition module 201 need obtain the operating frequency of rear end command centre receiving element earlier.
Said rear end sending module 202 is used for the operating frequency according to the rear end command centre receiving element that obtains, and forward end communication equipment transmitting element sends the operating frequency modify instruction;
After the operating frequency of having obtained rear end command centre receiving element; When needs were revised the operating frequency of a certain front end communication equipment transmitting element, rear end sending module 202 sent an instruction of revising the front end communication equipment transmitting element operating frequency of a certain address approximately according to system specifications.
Preferably, said rear end sending module 202 also is used for forward end communication equipment transmitting element and sends the operating state query statement.
Said front-end control module 203 is used for according to the operating frequency modify instruction that sends, the operating frequency of adjustment front end communication equipment transmitting element.
Preferably, said front-end control module 203 comprises the instruction transformation module, and said instruction transformation module is used for converting the operating frequency modify instruction into be suitable for the identification of front end communication equipment transmitting element form.After front end communication equipment receives the operating frequency modify instruction; Front-end control module 203 is the command format that front end communication equipment transmitting element can be discerned through the instruction transformation module with instruction transformation; Front end communication equipment transmitting element carries out the frame format verification to instruction and promptly changes its operating frequency after errorless; This moment former operating frequency to become subsequent use, new operating frequency be operating frequency.
Preferably, said front-end control module 203 also is used for the operating state query statement that sent according to rear end sending module 202, the operating state query statement is converted into the form that is suitable for the identification of front end communication equipment transmitting element through the instruction transformation module.Front end communication equipment transmitting element to query statement carry out the frame format verification errorless after, working status parameter is sent to rear end command centre receiving element.
Be connected through the RS232 interface between said front-end control module 203 and the front end communication equipment transmitting element.Preferably, if the operating frequency of adjusted front end communication equipment transmitting element is identical with the operating frequency of rear end command centre receiving element, then front end communication equipment transmitting element is sent to rear end command centre receiving element with video information; If the operating frequency of adjusted front end communication equipment transmitting element is different with the operating frequency of rear end command centre receiving element, then said front-end control module 203 also can be further used for storing the video information that front end communication equipment is gathered.
Said front-end control module 203 is to accomplish the important component part of front end FREQUENCY CONTROL, and as a kind of preferred embodiment, it can be made up of CPU, communication interface, memory, Control Software etc., and its effect has: the interface of communication and the conversion of communication instruction; The scheduling decision of rear end command centre is carried out in logic control; Information stores is not temporarily stored during the video information of receiving front-end communication equipment in command centre, sends to rear end command centre to information transmitted not again when treating communication recovery.
In wireless video monitoring system, front end communication equipment transmitting element can preset a plurality of channels, as presets 10 channels, Frequency point of each channel allocation.Have only a channel effective during work, other channels are invalid.Channel one is the working channel of acquiescence when dispatching from the factory, and other channels are subsequent use channels.
Above-described embodiment of the present invention does not constitute the qualification to protection range of the present invention.Any modification of within spirit of the present invention and principle, being done, be equal to replacement and improvement etc., all should be included within the claim protection range of the present invention.
Claims (10)
1. a wireless video monitoring system control method for frequency is characterized in that, may further comprise the steps:
Obtain the operating frequency of rear end command centre receiving element;
According to the operating frequency of the rear end command centre receiving element that obtains, forward end communication equipment transmitting element sends the operating frequency modify instruction;
According to the operating frequency modify instruction that sends, the operating frequency of adjustment front end communication equipment transmitting element.
2. wireless video monitoring system control method for frequency as claimed in claim 1 is characterized in that, and is said according to the operating frequency modify instruction that sends, and the step of the operating frequency of adjustment front end communication equipment transmitting element may further comprise the steps:
The operating frequency modify instruction is converted into the form that is suitable for the identification of front end communication equipment transmitting element;
According to the operating frequency modify instruction after the format conversion, the operating frequency of adjustment front end communication equipment transmitting element.
3. wireless video monitoring system control method for frequency as claimed in claim 1 is characterized in that, sends at said forward end communication equipment transmitting element before the step of operating frequency modify instruction, may further comprise the steps:
Forward end communication equipment transmitting element sends the operating state query statement;
The operating state query statement is converted into the form that is suitable for the identification of front end communication equipment transmitting element;
According to the operating state query statement after the format conversion, the working status parameter of front end communication equipment transmitting element is sent to rear end command centre receiving element.
4. wireless video monitoring system control method for frequency as claimed in claim 1 is characterized in that,,, may further comprise the steps after the step of the operating frequency of adjustment front end communication equipment transmitting element according to the operating frequency modify instruction that sends said:
If the operating frequency of adjusted front end communication equipment transmitting element is identical with the operating frequency of rear end command centre receiving element, then front end communication equipment transmitting element is sent to rear end command centre receiving element with video information;
If the operating frequency of adjusted front end communication equipment transmitting element is different with the operating frequency of rear end command centre receiving element, store video information then.
5. a wireless video monitoring system frequency control apparatus is characterized in that, comprises operating frequency acquisition module, rear end sending module and front-end control module;
Said operating frequency acquisition module is used to obtain the operating frequency of rear end command centre receiving element;
Said rear end sending module is used for the operating frequency according to the rear end command centre receiving element that obtains, and forward end communication equipment transmitting element sends the operating frequency modify instruction;
Said front-end control module is used for according to the operating frequency modify instruction that sends, the operating frequency of adjustment front end communication equipment transmitting element.
6. wireless video monitoring system frequency control apparatus as claimed in claim 5 is characterized in that, said front-end control module comprises the instruction transformation module;
Said instruction transformation module is used for converting the operating frequency modify instruction into be suitable for the identification of front end communication equipment transmitting element form.
7. wireless video monitoring system frequency control apparatus as claimed in claim 5 is characterized in that, said rear end sending module also is used for forward end communication equipment transmitting element and sends the operating state query statement.
8. wireless video monitoring system frequency control apparatus as claimed in claim 7; It is characterized in that; Said front-end control module also is used for the operating state query statement that sent according to the rear end sending module, and the working status parameter of front end communication equipment transmitting element is sent to rear end command centre receiving element.
9. wireless video monitoring system frequency control apparatus as claimed in claim 6 is characterized in that, said instruction transformation module also is used for converting the operating state query statement into be suitable for the identification of front end communication equipment transmitting element form.
10. wireless video monitoring system frequency control apparatus as claimed in claim 5 is characterized in that, said front-end control module also is used for store video information.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210014418.9A CN102547745B (en) | 2012-01-16 | 2012-01-16 | Frequency control method and device of wireless video monitoring system |
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| CN201210014418.9A CN102547745B (en) | 2012-01-16 | 2012-01-16 | Frequency control method and device of wireless video monitoring system |
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| CN102547745A true CN102547745A (en) | 2012-07-04 |
| CN102547745B CN102547745B (en) | 2014-10-01 |
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Cited By (1)
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|---|---|---|---|---|
| CN103916631A (en) * | 2014-03-14 | 2014-07-09 | 上海交通大学 | Mobile video monitoring system based on cognitive radio and method thereof |
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