CN102056208B - Front-end equipment, wireless communication system and method - Google Patents
Front-end equipment, wireless communication system and method Download PDFInfo
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Abstract
The embodiment of the invention discloses front-end equipment, a wireless communication system and a method so as to solve the problem that the use of single frequency band probably causes abnormal communication under abnormal situations. The front-end equipment comprises a communication control unit and a plurality of front-end communication units working at different frequency bands, wherein the communication control unit is used for implementing a sending strategy when information needs to be sent; and the sending strategy is as follows: the sending strategy controls at least one front-end communication unit which can establish normal communication with back-end equipment to be in working state and controls at least one front-end communication unit to be in non-working state when abnormal situations which affect the communication of the back-end equipment do not appear, otherwise, the sending strategy implements an emergency communication strategy for promoting the communication to recover to a normal state. Therefore, the front-end equipment can adopt the plurality of the front-end communication units working at the different frequency bands to carry out the communication with the back-end equipment, and the plurality of the front-end communication units can complete the emergency communication strategy when the abnormality occurs, so that the problem is solved.
Description
Technical field
The present invention relates to wireless communication technology field, more particularly, relate to headend equipment, wireless communication system and method.
Background technology
The wireless communication system in some fields such as wireless security protection warning, cordless telephone, bluetooth comprises headend equipment and the rear end equipment communicating each other, and can use different frequency ranges to communicate between headend equipment and rear end equipment.
But inventor finds implementing when of the present invention, at present, the headend equipment in a set of wireless communication system and rear end equipment only select single frequency band to communicate.Like this, when there are affect the abnormal conditions (such as co-channel interference or adjacent frequency interference) that headend equipment communicates by letter with rear end equipment, very easily there is the problem that rear end equipment and headend equipment cannot proper communications.
Summary of the invention
In view of this, the object of the invention is to provide headend equipment, wireless communication system and method, to solve the problem that single frequency band easily cannot proper communication under abnormal conditions of using.
For achieving the above object, the invention provides following technical scheme:
According to the embodiment of the present invention aspect, provide a kind of and can carry out the headend equipment that multiband is communicated by letter with rear end equipment, comprise communication control unit and a plurality of front end communication unit that works in different frequency range, described communication control unit is used for: when needs send information, carry out sending strategy, described information comprises at least one in text, monitoring information and circular information;
Described sending strategy comprises: when not there are not the abnormal conditions that impact is communicated by letter with described rear end equipment, control that at least one can to set up the front end communication unit of proper communication in running order with rear end equipment, and control at least one front end communication unit in non operating state, otherwise, carry out and impel the normal emergency communication strategy of communication recovery;
Described operating state at least comprises emission state.
According to another aspect of the embodiment of the present invention, a kind of wireless communication system is provided, comprise headend equipment and the rear end equipment that can carry out multiband communication, described headend equipment comprises communication control unit and a plurality of front end communication unit that works in different frequency range, described communication control unit is used for: when needs send information, carry out sending strategy;
Described sending strategy comprises: when not there are not the abnormal conditions that impact is communicated by letter with described rear end equipment, control that at least one can to set up the front end communication unit of proper communication in running order with rear end equipment, and control at least one front end communication unit in non operating state, otherwise, carry out and impel the normal emergency communication strategy of communication recovery;
Described operating state at least comprises emission state.
Another aspect according to the embodiment of the present invention, provides a kind of wireless communications method, and based on carrying out the headend equipment that multiband is communicated by letter with rear end equipment, described headend equipment comprises a plurality of front end communication unit that work in different frequency range, and described method comprises:
When needs send information, carry out sending strategy;
Described sending strategy comprises: when not there are not the abnormal conditions that impact is communicated by letter with described rear end equipment, control that at least one can to set up the front end communication unit of proper communication in running order with rear end equipment, and control at least one front end communication unit in non operating state, otherwise, carry out and impel the normal emergency communication strategy of communication recovery;
Described operating state at least comprises emission state.
From above-mentioned technical scheme, can find out, in embodiments of the present invention, headend equipment can adopt a plurality of front end communication unit and rear end equipment that work in different frequency range to communicate, and above-mentioned a plurality of front end communications unit can occur when abnormal to complete emergency communication strategy, thereby solved existing, use the problem that single frequency band cannot proper communication under abnormal conditions.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
The wireless communication system architecture schematic diagram that Fig. 1 provides for the embodiment of the present invention;
Another structural representation of wireless communication system that Fig. 2 provides for the embodiment of the present invention;
The another structural representation of wireless communication system that Fig. 3 provides for the embodiment of the present invention;
The wireless security alarm system structural representation that Fig. 4 provides for the embodiment of the present invention;
Another structural representation of wireless security alarm system that Fig. 5 provides for the embodiment of the present invention.
Embodiment
For quote and know for the purpose of, the technical term hereinafter using, write a Chinese character in simplified form or abridge to sum up and be explained as follows:
ASK:Amplitude Shift Keying, amplitude shift keying;
OOK:On-Off Keying, binary system on off keying;
FSK:Frequency-shift keying, frequency shift keying;
GFSK:Gauss frequency Shift Keying, Gaussian Frequency Shift Keying;
Co-channel interference, can drop on useful signal and receive the various electromagnetic interference in passband;
Adjacent frequency is disturbed, the interference between side frequency;
The use regulation of China to wireless security alarm system/device:
Frequency of utilization scope is 314-316MHz, 430-432MHz, and 433.00-434.79MHz; Occupied bandwidth: be not more than 400kHz;
The duration that each wireless signal sends is no more than 1 second.
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the present invention's part embodiment, rather than whole embodiment.Embodiment based in the present invention, those of ordinary skills, not making the every other embodiment obtaining under creative work prerequisite, belong to the scope of protection of the invention.
Wireless communication system is widely used in the technical fields such as wireless security protection warning, cordless telephone, bluetooth.In the prior art, above-mentioned wireless communication system generally comprises headend equipment and rear end equipment, wherein, headend equipment comprises information generating unit and front end communication unit, the information that front end communication unit can produce information generating unit sends, and in some design, can receive the information from outside (rear end equipment).
At present, the headend equipment in a set of wireless communication system and rear end equipment only select single frequency band to communicate.Like this, when there are affecting the abnormal conditions that headend equipment communicates by letter with rear end equipment, very easily there is the problem that rear end equipment and headend equipment cannot proper communications.
The embodiment of the present invention provides a kind of wireless communication system addressing the above problem, Fig. 1 shows its a kind of structure, comprise headend equipment 1 and the rear end equipment 2 that can carry out multiband communication, wherein, headend equipment 1 comprises a plurality of front end communication unit 11 (being also that each residing frequency range in front end communication unit 11 is all not identical with other arbitrary front end communication unit 11 residing frequency ranges) and communication control units 12 that work in different frequency range, and communication control unit 12 is for when needs send information, carry out sending strategy;
Described sending strategy comprises: when not there are not the abnormal conditions that impact is communicated by letter with rear end equipment 2, control that at least one can to set up the front end communication unit 11 of proper communication in running order with rear end equipment, and control at least one front end communication unit 11 in non operating state, otherwise, carry out and impel the normal emergency communication strategy of communication recovery.
The control of the communication control unit in the present invention, front end communication unit being subject to is called strategy or control strategy.In above-mentioned strategy, operating state can be the general designation of holding state (or claim can sending/receiving information state), sending and receiving state, also can be the general designation of sending and receiving state, also can only refer to transmission state, and for same front end communication unit 11, the state of holding state and sending/receiving information can not exist simultaneously; And non operating state, according to the difference of operating state institute content, changes.It is to be noted, no matter which kind of the included content of operating state done and changed, and state (such as off-position or resting state or power consumption deficiency cannot maintain the state of normal operating conditions completely) that cannot sending/receiving information all belongs to the category of non operating state.
As for when not needing to send information, above-mentioned a plurality of front end communications unit both can, all in non operating state, can, partly in non operating state, specifically not limit in the present invention yet.
Now first performed sending strategy in the time need to sending information and not occur affecting the abnormal conditions of communicating by letter with rear end equipment is introduced.
By way of example, when the number of front end communication unit 11 is two, in the time need to sending information and not occur affecting the abnormal conditions of communicating by letter with rear end equipment 2, it is in running order that communication control unit 12 is controlled a front end communication unit 11, and another front end communication unit 11 is in non operating state.In this example, operating state can only refer to transmission state.When front end communication unit 11 sends after information, belong to the situation that does not need the information that sends, now, communication control unit 12 can be controlled original place and enter holding state or off-position or resting state in the front end communication unit 11 of the state of transmission, and the front end communication unit 11 that also can control all or part enters holding state or off-position or resting state;
And when the number of front end communication unit 11 is three, in the time need to sending information and not occur affecting the abnormal conditions of communicating by letter with rear end equipment 2, it is in running order that communication control unit 12 both can have been controlled a front end communication unit 11, other two front end communication unit 11 are in non operating state, also can control two front end communication unit 11 in running order, and another front end communication unit 11 is in non operating state.In this example, operating state comprises three kinds of standby, sending and receivings.Therefore, when communication control unit 12 is controlled two front end communication unit 11 when in running order, specifically can be one of them front end communication unit 11 transmission information (even if it is in transmission state) that make, and another is in standby or accepting state, certainly also can make two front end communication unit 11 all send information.Those skilled in the art can carry out flexible design as required, and therefore not to repeat here.In like manner, in this example, when front end communication unit 11 sends after information, also just belong to the situation that does not need the information that sends, now, communication control unit 12 both can have been controlled original place and enter non operating state in the front end communication unit 11 of operating state, and the front end communication unit 11 that also can control all or part all enters non operating state.
Those skilled in the art can be pushed into technique scheme class the situation of other numbers, and therefore not to repeat here.
It should be noted that above-mentioned a plurality of front end communications unit 11 can be separately independently physical entity, also can be virtual logical block, also can adopt a front end communication module (or chip) to communicate with different frequency ranges and rear end equipment 2.Now, communication control unit 12 can be controlled this module (or chip) and use which frequency range work.
Because rear end equipment 2 need to keep proper communication with headend equipment 1, therefore, rear end equipment 2 also can comprise a plurality of back end communications unit of different frequency range or back end communications modules (or chip) that can receive multi-band signal of working in.A plurality of back end communications unit of rear end equipment 2 or a plurality of reception frequency range can be simultaneously in running order, also can carry out with above-mentioned sending strategy and receive accordingly strategy, to guarantee not miss information.Those skilled in the art can carry out respective design as required, and therefore not to repeat here.
In addition, above-mentioned communication control unit 12 both can be independent of other unit, also can be combined with other unit.By way of example, referring to Fig. 2, a certain front end communication unit also can possess the function of communication control unit, can, using this front end communication unit as main communication unit 201, control the state of other front end communication unit 11.Or, referring to Fig. 3, above-mentioned a plurality of front end communications unit 11 is divided into some groups, in each group, can be by some front end communication unit that possesses communication control function as main communication unit 301, other front end communication unit 11 in control group.
In like manner, at communication control unit 12, be independently during unit, both can the corresponding communication control unit 12 in each front end communication unit 11, also can be by 11 groupings of a plurality of front end communications unit, every group of corresponding communication control unit 12, certainly, also can use a communication control unit 12 to control all front end communication unit 11.
For realizing when there are abnormal conditions, headend equipment 1 still can be realized and communicating by letter with rear end equipment 2, and above-mentioned emergency communication strategy can be: control at least one former front end communication unit 11 in non operating state and enter operating state.And former in running order front end communication unit 11, can be still in running order, also can transfer non operating state to, or, when the quantity of former in running order front end communication unit 11 is greater than 1, also the former in running order front end communication unit 11 of controllable portion enters non operating state.Those skilled in the art can carry out flexible design as required, and therefore not to repeat here.
In addition, above-mentioned emergency communication strategy specifically also can be: preferentially control the front end communication unit that the frequency range of frequency range and former in running order front end communication unit is separated by farthest and enter operating state.By way of example, the working frequency range of former in running order front end communication unit is A, there are two front end communication unit in non operating state simultaneously, its working frequency range is respectively B and C, and the difference between B and A is greater than the difference between C and A, so when there are abnormal conditions, the front end communication unit of preferentially controlling working frequency range and be B enters operating state.
Can find out, in the present embodiment, headend equipment 1 can adopt a plurality of front end communication unit 11 that work in different frequency range to communicate with rear end equipment 2, and above-mentioned a plurality of front end communications unit 11 can occur when abnormal to complete emergency communication strategy, thereby solved existing, use the problem that single frequency band cannot proper communication under abnormal conditions.
Be understandable that, the former front end communication unit in non operating state of above-mentioned emergency communication policy control has entered operating state, now, if meet the condition of carrying out sending strategy, communication control unit 12 will be carried out sending strategy, otherwise communication control unit 12 will be carried out the emergency communication strategy of next round.
For more convenient understanding technical conceive of the present invention, existing take wireless security protection alarm field and describe in detail as example.
Existing wireless security alarm system also comprises headend equipment and rear end equipment.Above-mentioned headend equipment also can be described as warning probe unit/equipment, specifically can be a magnetic inductor, infrared inductor, microwave detector, ceiling type thermosonde, gas leakage detector, for colliery, gas detector, elevator operation detector, Air conditioners running mode detector, the various instrument and equipment running status of machine room detector, smoke alarm, flash appeal button, finger-print puzzle lock, protection network etc. are surveyed various information word device/apparatus, and above-mentioned rear end equipment can be controlling alarm main frame, information management main control system etc.Large-scale wireless security alarm system also can comprise information control center.
When headend equipment detects alert, above-mentioned information generating unit produces warning message, and via the equipment transmission to the back-end of front end communication unit, rear end equipment receives and does corresponding alert to above-mentioned warning message and processes, as indicates relevant components and parts/equipment to do corresponding action, the relevant components and parts/equipment of indication by default requirement and send alarm call, automatically dial preset number or communicate by letter etc. with information control center.
At present, between the headend equipment of wireless security alarm system and rear end equipment, several open frequency ranges such as the main 315MHz of use (China and U.S.A is used more), 433MHz (China and Europe), 868MHz (Europe is used more), 915MHz (U.S. is used more), 2.4GHZ communicate (also having other various frequency ranges of employing to communicate).
The wireless security alarm system that works in single frequency band is very easily subject to high-power electric unit/device, various radio-cell/the equipment of normal work, the interference unit that offender uses, and electromagnetic co-channel interference or adjacent frequency that other various situations (as sunspot explosion, automobile engine, various motor, electric operation etc.) produce are disturbed.These all cause the rear end equipment warning message that normally receiving front-end equipment sends or the information that receives imperfect, the appearance that causes failing to report alert phenomenon.
In the present invention, can affect all situations that headend equipment communicates by letter with rear end equipment and be referred to as abnormal conditions.And in the present embodiment, when all or part of front end communication unit is interfered, can be considered generation abnormal conditions.One of ordinary skill in the art will appreciate that to only have when front end communication unit is in running order, just may be interfered, when it is during in non operating state, can not be interfered.In the narration after the present invention, also will be introduced other abnormal conditions, for convenience of difference, the existing situation that above-mentioned all or part of front end communication unit is interfered is called the first abnormal conditions.
To the judgement of disturbing, can have various ways, for example, when all or part of front end communication unit receives information, but this information be when cannot correctly identify, and now this visualization of information is interfere information, is just considered as being interfered; Also can, to setting a threshold values interference time, while being not less than this threshold values, just be considered as being interfered; Also can set energy or power threshold to received interference signal, when the energy of interference signal or power are not less than above-mentioned energy or power threshold, just be considered as being interfered, etc.
Based on above-mentioned, to the judgement of disturbing, the emergency communication strategy of communication control unit 12 also can be: when the power of received interfere information is less than predetermined threshold value, improve the transmitting power of in running order front end communication unit.
Or also can be: when the power of received interfere information is less than predetermined threshold value, improve the transmitting power of in running order front end communication unit, otherwise control at least one former front end communication unit in non operating state, enter operating state.
In China, wireless security alarm system works in 315MHz frequency range and 433MHz frequency range more, and existing to take 315MHz frequency range and these two frequency ranges of 433MHz be example, and technical scheme of the present invention is introduced.
Referring to Fig. 4, in the present embodiment, headend equipment comprises and works in the front end communication unit 401 of 315M, the front end communication unit 402 that works in 433M frequency range and communication control unit 12.
When there are not above-mentioned the first abnormal conditions, it is in running order that communication control unit 12 is controlled front end communication unit 401, and front end communication unit 402 is in non operating state, and vice versa; And when front end communication unit 401 receives above-mentioned interfere information, communication control unit 12 is carried out emergency communication strategy-startup front end communication unit 402, now front end communication unit 401 can be still in running order, also can transfer non operating state to.And if transfer front end communication unit 401 to non operating state, both can be designed to after front end communication unit 401 sends information be transferred to non operating state, also can be designed to one and receive interfere information, be about to former in running order front end communication unit 401 and transfer non operating state to.
Due to 433MHz frequency range apart from 315M frequency range relatively far apart, therefore the interfere information that causes co-channel interference or adjacent frequency to disturb for 315M frequency range can't interfere with the front end communication unit 402 of 433M frequency range and communicating by letter of rear end equipment 2, also be that wireless security alarm system can be used 433M frequency range normally to work, vice versa.
Visible, when headend equipment 1 adopts 315M and two frequency ranges of 433M to communicate with rear end equipment 2, if wherein a certain frequency range is interfered, another frequency range can enter operating state to keep proper communication, thereby has solved the alert problem of failing to report that existing, only to use single frequency band wireless security alarm system causes because being interfered.
Certainly, because the frequency range for wireless security protection communication in global range has 315MHz, 433MHz, 868MHz and 915MHz, therefore, when specific implementation, those skilled in the art can therefrom choose 2,3 and even 4 frequency range collocation uses (the more level of securitys of use frequency range are also just higher) as required, and therefore not to repeat here.
In addition, front end communication unit also may break down, and causes information to send, and therefore, all or part of front end communication unit can be broken down and is called the second abnormal conditions.
In other embodiments of the invention, front end communication unit in all embodiment can comprise front end transmitting element above, also can both comprise that front end transmitting element also comprised front end receiving element, front end transmitting element and front end receiving element can be separate, also can be integrated in one.
Be understandable that, when front end communication unit only includes front end transmitting element, front end communication unit sends information only, and its corresponding operating state can only include transmission state, also can comprise transmission state and holding state; And when front end communication unit comprises front end receiving element and front end transmitting element simultaneously, meaning that it both can send information and also can receive information, its corresponding operating state also can add accepting state or not add as required accepting state so.
Rear end equipment in all embodiment, after receiving the information of headend equipment transmission, can be returned to confirmation signal, to notify headend equipment information to receive above.Now, front end communication unit must have receiving function.Certainly, can be designed to after rear end equipment receives complete information just return to confirmation signal, otherwise not return.Like this, when all or part of front end communication unit does not receive definite information, can think that headend equipment and communicating by letter of rear end equipment occur abnormal, communication control unit 12 can start emergency communication strategy.In the present invention, above-mentioned all or part of front end communication unit is not received and determine that the situation of information is called the 3rd abnormal conditions.
Cause all or part of front end communication unit not receive and determine that the reason of information may have multiple, such as: rear end equipment is disturbed or breaks down when sending confirmation, so that cannot send confirmation, also may be that front end communication unit is maliciously shielded and cannot normally receive, which kind of situation no matter, all mean that front end cannot set up normal communication with rear end, all need to take emergency communication strategy.
In addition, it should be noted that, the information that the information generating unit of headend equipment produces can not only comprise warning message, also can comprise monitoring information and circular information: headend equipment can be regular or irregular transmission monitoring information (signal) to rear end equipment, and rear end equipment can be returned to a confirmation after receiving above-mentioned monitor signal, thereby the communication control unit of headend equipment can be monitored the two and whether can be set up normal communication; And before headend equipment equipment transmission to the back-end warning message, can first send circular information to rear end equipment, to inform that it has warning message to send and please carry out corresponding reception preparation.And rear end equipment can be returned to a confirmation after receiving above-mentioned circular information, thereby the communication control unit of headend equipment can know whether the two follow-uply can set up normal communication.
Above-mentioned warning message can be described as text.In different applications, the content that text comprises is not quite similar, and therefore not to repeat here.
In other embodiments of the invention, rear end equipment also can regularly or irregularly send monitoring information by forward end equipment, and now, front end communication unit also must have receiving function.And when all or part of front end communication unit does not receive the monitoring information that rear end equipment sends, communication control unit 12 can judge that the two cannot set up normal communication, thereby start emergency communication strategy.The monitoring information that above-mentioned all or part of front end communication unit does not receive described rear end equipment transmission can be described as the 4th abnormal conditions;
Abnormal conditions in the present invention can comprise one or more (also can be all) in above-mentioned the first to second abnormal conditions, it should be noted that, third and fourth abnormal conditions for be front end communication unit contingent abnormal conditions while thering is front end receiving element or receiving function, in the situation that front end communication unit not being carried out to receiving function design, can not do to consider.In addition, some other situation that affects headend equipment and rear end equipment, also belongs to abnormal conditions.Those skilled in the art can carry out flexible design and restriction as required, and therefore not to repeat here.
In addition, it should be noted that, in above-mentioned all embodiment, both all in running order front end communication unit all cannot can be set up and were just considered as occurring abnormal conditions while communicate by letter with rear end equipment, also can be in the in running order front end communication unit of part cannot be considered as occurring abnormal conditions when rear end equipment foundation is communicated by letter.For above-mentioned two kinds of different modes, communication control unit is also different to the particular content of the control strategy of front end communication unit:
When all in running order front end communication unit all cannot be set up and communicate by letter while being just considered as abnormal conditions occur with rear end equipment, communication control unit can be controlled original place and enter operating state in the front end communication unit of non operating state, meanwhile communication control unit can be controlled original in running order unit and enters non operating state or make it still in running order, as long as can set up and communicate by letter with rear end equipment because there is a front end communication unit, not meeting whole unit cannot set up this condition of communicating by letter with rear end equipment, is not considered as occurring abnormal conditions.So, communication control unit can be carried out sending strategy;
And communicate by letter while being considered as abnormal conditions occur when setting up with rear end equipment in the in running order front end communication unit of part, communication control unit enters operating state except controlling the former front end communication unit in non operating state, also need to make former unit in running order and that cannot communicate by letter with rear end equipment foundation to enter non operating state, otherwise, as long as having a front end communication unit cannot set up and communicate by letter with rear end equipment, be considered as all the time occurring extremely, and then cannot carry out sending strategy all the time.
When a set of wireless security alarm system comprises a more than headend equipment, if just just have a plurality of headend equipments to send information at synchronization, may there is the phenomenon of co-channel interference.Such as: a certain headend equipment is the information of the 315MHz of equipment transmission to the back-end at a time, just another headend equipment also sends the information of 315MHz to same rear end equipment at synchronization, so, between two information, will there is co-channel interference, occur the first abnormal conditions.The 433MHz frequency range that now two headend equipments all will start separately sends information separately again, also may occur co-channel interference so in 433MHz frequency range.Will cause like this signal to be missed.In addition, between overlapping in wireless security alarm system, also may there is co-channel interference more.
For avoiding the generation of above-mentioned situation, referring to Fig. 5, wireless security alarm system also can comprise sending controling unit 501, sends the time interval of information for controlling the front end communication unit of headend equipment 502 and 503.
In a set of wireless security alarm system, can only include a sending controling unit and control all front end communication unit, also can all corresponding sending controling unit in each front end communication unit.
For the co-channel interference that may exist between different headend equipments in same wireless security alarm system, can solve in the following ways: when headend equipment 502 and 503 locations alert occurs simultaneously need to send warning message, and the warning message that headend equipment 502 and 503 315MHz front end communication unit separately sends causes co-channel interference each other, when thereby headend equipment 502 and 503 has started the front end communication unit of 433MHz separately, the 433MHz front end communication unit that sending controling unit 501 can be controlled headend equipment 502 sends information after the front end communication unit of 315MHz sends information 500ms again, and the 433MHz front end communication unit of controlling in headend equipment 503 sends information after its 315MHz front end communication unit sends information 800ms again, headend equipment 502 and 503 433MHz warning message separately can be received by rear end equipment like this.Certainly, above-mentioned 500ms and 800ms are only for giving an example, and those skilled in the art can carry out flexible design to above-mentioned numerical value as required.And when more than two of front end number of devices, can control with reference to aforesaid way, therefore not to repeat here;
Certainly, sending controling unit 501 also can be avoided the co-channel interference between a plurality of headend equipments in same system by controlling the adjacent mode of the interval time of information that sends for twice in front end communication unit.Such as: in headend equipment 502, the front end communication unit of 315MHz can be under the control of above-mentioned sending controling unit 501, interval 60s sends primary information again, and in headend equipment 503, the front end communication unit of 315MHz can send primary information by interval 70s under the control of above-mentioned sending controling unit 501 again.In addition, sending controling unit 501 also can coordinate with communication control unit, by communication control unit controls front end communication unit, sent the number of times of information, to guarantee that as far as possible headend equipment 502 and 503 has at least the information once sending to be received by rear end equipment separately.And when more than two of front end number of devices, can control with reference to aforesaid way, therefore not to repeat here.Above-mentioned two kinds of modes also can be combined with, to reach the problem of co-channel interference that better prevents headend equipments different in homologous ray.
In actual applications, the function of sending controling unit and communication control unit can be realized by a functional module (or chip), also can be separate physical entity, and therefore not to repeat here.
For many covers wireless security alarm system, can utilize equally sending controling unit in system separately control in self system same or different between front end communication unit send interval time of information, make it different to eliminate co-channel interference from the interval time of transmitted signal in another system, therefore not to repeat here.
In addition, also can avoid co-channel interference in conjunction with following manner: a certain headend equipment does not occur when abnormal, by the front end communication unit transmitted signal of 315M frequency range, there is starting when abnormal the front end communication unit of 433MHz frequency range, another headend equipment is just the opposite.
Preferably, the wireless security alarm system in above-mentioned all embodiment also can comprise warning unit, for there is malicious interference meeting pre-conditioned time warning.There are above-mentioned abnormal conditions in above-mentioned pre-conditioned can be, also can be all front end communication unit and be all interfered or cannot set up proper communication with rear end equipment.
In existing single frequency band wireless security alarm system, there is a kind of mode to report to the police for being interfered: when back end communications unit is interfered in coverage, system will be warned generation malicious interference.There is more serious false alarm phenomenon in this technical scheme, because a large amount of uses along with wireless device, air interference often occurs, but the ratio of malicious interference is lower, only have the talent conference of real preparation crime to carry out malicious interference to wireless security alarm system, the warning that this mode that therefore adopting is interfered reports to the police is sent is all often false alarm.
Some producer improves for this reason, when being interfered, system do not send at once alarm signal, but reach (such as by 60 seconds) after the regular hour and just warn being disturbed, can reduce some false alarms like this, but not deal with problems completely.And if offender understands this function, just can carry out PERIODIC INTERFERENCE (stop, and then then disturb) after disturbing 50 seconds, system just can not sent warning, will cause so new problem-fail to report police, and its consequence is more serious.
And the warning unit of the present embodiment be can be designed to all cannot set up proper communication with rear end equipment in all front end communication unit time, there is malicious interference in warning.Relatively far apart, the electromagnetic frequency range that other radio-cell/equipment of general normal work, high-power unit/device and other various situations produce can be so not large for each frequency range of using due to wireless security alarm system.Therefore, when all front end communication unit are all interfered or cannot set up proper communication with rear end equipment, especially all unit are all interfered, and its reason is generally offender wireless security alarm system has been carried out to multifrequency or full range malicious interference.Visible, the accuracy rate of warning warning generation malicious interference in unit in the present embodiment is quite high.
In addition, the interference that wireless security alarm system is also likely subject to working in the normal wireless equipment of 315M frequency range simultaneously and works in the normal wireless equipment of 433M frequency range, in order further to improve the accuracy rate of warning, predeterminable duration of disturbance threshold values (as 1 second), when all front end communication unit are all interfered and the duration of this interference surpasses pre-set threshold value, generation malicious interference is just warned in warning unit like this.
Headend equipment in all embodiment, at the row of protection scope of the present invention, does not also repeat at this yet above.
Corresponding with above-mentioned headend equipment, the embodiment of the present invention also provides a kind of wireless communications method based on above-mentioned headend equipment, and the method at least comprises the steps:
When needs send information, carry out sending strategy;
Described sending strategy comprises: when not there are not the abnormal conditions that impact is communicated by letter with described rear end equipment, control that at least one can to set up the front end communication unit of proper communication in running order with rear end equipment, and control at least one front end communication unit in non operating state, otherwise, carry out and impel the normal emergency communication strategy of communication recovery;
Described operating state at least comprises emission state.
Preferably, said method also can comprise the steps:
Control the time interval that front end communication unit sends information.
Preferably, said method also can comprise the steps:
There is malicious interference meeting pre-conditioned time warning.
It should be noted that, the information that in above all embodiment, front end communication unit sends can be selected different modulation systems as required, as ASK/OOK/FSK/GFSK etc. or Different Modulations mix, uses.And can select fixedly frequency or frequency-hopping spread spectrum mode to receive and dispatch alarm signal, certainly, also fixedly frequency and frequency-hopping spread spectrum mode are mixed use; Between front end communication unit and rear end equipment, can select a kind of coded system (as fixed code, learning code, rolling code or other specific coding) also can Multi-encoding mode mix use.
In this specification, each embodiment adopts the mode of going forward one by one to describe, and each embodiment stresses is the difference with other embodiment, between each embodiment identical similar part mutually referring to.For the disclosed method of embodiment, because it is corresponding with the disclosed system of embodiment, so description is fairly simple, relevant part illustrates referring to components of system as directed.
Above-mentioned explanation to the disclosed embodiments, makes professional and technical personnel in the field can realize or use the present invention.To the multiple modification of these embodiment, will be apparent for those skilled in the art, General Principle as defined herein can, in the situation that not departing from the spirit or scope of the present invention, realize in other embodiments.Therefore, the present invention will can not be restricted to these embodiment shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (8)
1. one kind can be carried out the headend equipment that multiband is communicated by letter with rear end equipment, it is characterized in that, comprise communication control unit and a plurality of front end communication unit that works in different frequency range, described communication control unit is used for: when needs send information, carry out sending strategy, described information comprises at least one in text, monitoring information and circular information;
Described sending strategy comprises: when not there are not the abnormal conditions that impact is communicated by letter with described rear end equipment, control that at least one can to set up the front end communication unit of proper communication in running order with rear end equipment, and control at least one front end communication unit in non operating state, otherwise, carry out and impel the normal emergency communication strategy of communication recovery;
Described emergency communication strategy comprises: control at least one former front end communication unit in non operating state and enter operating state, and preferentially control the front end communication unit that the frequency range of frequency range and former in running order front end communication unit is separated by farthest and enter operating state;
Described operating state at least comprises emission state.
2. headend equipment as claimed in claim 1, is characterized in that, described emergency communication strategy also comprises: when the power of received interfere information is less than predetermined threshold value, improve the transmitting power of in running order front end communication unit.
3. headend equipment as described in claim 1 to 2 any one, is characterized in that, described abnormal conditions comprise at least one of the first abnormal conditions, the second abnormal conditions, the 3rd abnormal conditions and the 4th abnormal conditions;
Described the first abnormal conditions are that all or part of front end communication unit is interfered;
Described the second abnormal conditions are that all or part of front end communication unit breaks down;
Described the 3rd abnormal conditions are that all or part of front end communication unit does not receive definite information, and described definite information is returned after receiving described information by described rear end equipment;
Described the 4th abnormal conditions are that all or part of front end communication unit does not receive the monitoring information that described rear end equipment sends.
4. headend equipment as claimed in claim 3, is characterized in that, also comprises and controls the sending controling unit that described front end communication unit sends the time interval of information.
5. headend equipment as claimed in claim 4, is characterized in that, is also included in and meets the attention device that malicious interference occurs in pre-conditioned time warning.
6. a wireless communication system, comprise headend equipment and the rear end equipment that can carry out multiband communication, it is characterized in that, described headend equipment comprises communication control unit and a plurality of front end communication unit that works in different frequency range, described communication control unit is used for: when needs send information, carry out sending strategy;
Described sending strategy comprises: when not there are not the abnormal conditions that impact is communicated by letter with described rear end equipment, control that at least one can to set up the front end communication unit of proper communication in running order with rear end equipment, and control at least one front end communication unit in non operating state, otherwise, carry out and impel the normal emergency communication strategy of communication recovery;
Described emergency communication strategy comprises: control at least one former front end communication unit in non operating state and enter operating state, and preferentially control the front end communication unit that the frequency range of frequency range and former in running order front end communication unit is separated by farthest and enter operating state;
Described operating state at least comprises emission state.
7. system as claimed in claim 6, is characterized in that, described emergency communication strategy also comprises: when the power of received interfere information is less than predetermined threshold value, improve the transmitted power of in running order front end communication unit.
8. a wireless communications method, based on carrying out the headend equipment that multiband is communicated by letter with rear end equipment, is characterized in that, described headend equipment comprises communication control unit and a plurality of front end communication unit that works in different frequency range, and described method comprises:
When needs send information, described communication control unit is carried out sending strategy;
Described sending strategy comprises: when not there are not the abnormal conditions that impact is communicated by letter with described rear end equipment, control that at least one can to set up the front end communication unit of proper communication in running order with rear end equipment, and control at least one front end communication unit in non operating state, otherwise, carry out and impel the normal emergency communication strategy of communication recovery;
Described emergency communication strategy comprises: control at least one former front end communication unit in non operating state and enter operating state, and preferentially control the front end communication unit that frequency range and the frequency range of in running order front end communication unit be separated by farthest and enter operating state;
Described operating state at least comprises emission state.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201010527706.5A CN102056208B (en) | 2010-10-27 | 2010-10-27 | Front-end equipment, wireless communication system and method |
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| CN201010527706.5A CN102056208B (en) | 2010-10-27 | 2010-10-27 | Front-end equipment, wireless communication system and method |
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| CN102056208A CN102056208A (en) | 2011-05-11 |
| CN102056208B true CN102056208B (en) | 2014-04-30 |
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| CN109348495B (en) * | 2018-12-24 | 2021-11-26 | 奇点新源国际技术开发(北京)有限公司 | Microwave protection wall system optimization method, system and base station management system |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1700621A (en) * | 2004-05-20 | 2005-11-23 | 联想(北京)有限公司 | An interconnected monitor system and method for implementing monitoring interconnection |
| CN201179165Y (en) * | 2007-12-24 | 2009-01-14 | 深圳市一电科技有限公司 | Baby monitoring system |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1700621A (en) * | 2004-05-20 | 2005-11-23 | 联想(北京)有限公司 | An interconnected monitor system and method for implementing monitoring interconnection |
| CN201179165Y (en) * | 2007-12-24 | 2009-01-14 | 深圳市一电科技有限公司 | Baby monitoring system |
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