CN102869019A - Method and device for improving spectrum resource utilization rate of interphones - Google Patents
Method and device for improving spectrum resource utilization rate of interphones Download PDFInfo
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Abstract
The invention discloses a method and a device for improving a spectrum resource utilization rate of interphones. The method comprises the following steps of: searching a frequency by a calling interphone, judging whether the frequency is idle in accordance with a preset principle, and assigning the frequency to be communication frequency by a controlling frequency if the frequency is idle in accordance with the preset principle; and communicating the calling interphone with a called interphone in the communication frequency, and releasing the communication frequency after the communication ends. The device comprises an assignment module and a communication module both arranged on the calling interphone, wherein the assignment module is used for searching the frequency, judging whether the frequency is idle in accordance with the preset principle and assigning the frequency to be the communication frequency if the frequency is idle in accordance with the preset principle; and the communication module is used for communicating the calling interphone with the called interphone in the communication frequency and releasing the communication frequency after the communication ends. The method and the device, disclosed by the invention, can improve the spectrum resource utilization rate of the interphones.
Description
Technical field
The present invention relates to the intercom field, specifically, relate to a kind of method and device that improves the intercom frequency spectrum resource utilization rate.
Background technology
Intercom is a kind of comparatively common professional mobile communications tool in the society, because it is a kind of communication system that does not have switching control center, thereby have: have hardly the system building cost, link up the characteristics such as convenient, in short distance communication, have good application.But also there are the following serious problems:
(1) frequency resource is not enough
In professional mobile communication, traditional frequency assignment mode is channel of each CU.Every profession and trade has wilderness demand for wireless interspeaker and the service of short data transport communication at present, and the frequency resource of existing frequency range can't satisfy the needs of social high speed development, especially according to the regulation of International Telecommunications Union in 2007,450～470MHz frequency range is allocated to public mobile communication 3G/4G, this frequency range is widely used in the intercom business of all trades and professions in China at present, when following China implements to reclaim this frequency range, with so that limited frequency resource is more inadequate.
Original intercom by national radio management stipulation, needed to go through all the procedures of approval to radio control department demand frequency before using, and then the corresponding frequency of assignment is used.Contradiction between the increase of social demand and the limited frequency resource constantly highlights, and some place not have frequency can be criticized, and makes the user cannot normally use intercom, has brought a lot of restrictions to social development.
(2) frequency management is improper
Since not the intercom of commensurate all assignment separately frequency is arranged, when the user needs trans-regional use intercom, its frequency only is its former location radio control department assignment, in another zone, then can the identical and interfering with each other situation of the frequency of occurrences, thus cause intercom normally not use.Moreover for solving the contradiction that frequency is few, the user is many, existing way is: some users share a frequency.So just, the problem of getting ready to go into action in hundreds that similar broadcasting frequency occurred: no matter whether call out you, also no matter whether you are ready to listen, all must start shooting and wait for.Along with the use of intercom is more and more extensive, such frequency assignment mode has not only increased the workload of administrative department, has reduced operating efficiency, causes inconvenience also for the user of intercom.
Along with the development of telecommunications and mobile subscriber's day by day increase, the wretched insufficiency of radio frequency resources highlights more, and traditional frequency assignment mode is both uneconomical, can not adapt to again the needs of telecommunications development, is necessary to improve.
Summary of the invention
The main technical problem to be solved in the present invention is a kind of method and device that improves the intercom frequency spectrum resource utilization rate to be provided, thereby can to satisfy more application demand under limited frequency spectrum resource.
For solving the problems of the technologies described above, the present invention has adopted following technical scheme:
A kind of method that improves the intercom frequency spectrum resource utilization rate comprises:
The default principle of caller intercom search rate and basis judges whether described frequency is idle, in this way, is communication frequency by control frequency with this frequency assignment;
The caller intercom carries out communication with called intercom on described communication frequency, discharge described communication frequency after communication finishes.
In a kind of embodiment of the method for the invention, whether the free time comprises the default principle determination frequency of described basis: whether the incoming level of judgement intercom on this frequency in this way, determines this frequency be idle frequence less than default incoming level thresholding.
In a kind of embodiment of the method for the invention, whether the free time comprises the default principle determination frequency of described basis: judge that whether the incoming level of intercom on this frequency is less than default incoming level thresholding, in this way, judge further whether this state duration less than default incoming level thresholding reaches Preset Time, in this way, determine that this frequency is idle frequence.
In a kind of embodiment of the method for the invention, described Preset Time is 0.25-1 second.
In a kind of embodiment of the method for the invention, described default incoming level thresholding is 0.5-1.5 μ V.
The present invention also provides a kind of device that improves the intercom frequency spectrum resource utilization rate, comprises the distribution modulator and the communication module that are arranged on the caller intercom;
Described distribution modulator is used for search rate and judges according to default principle whether described frequency is idle, in this way, is communication frequency by control frequency with this frequency assignment;
Described communication module is used for carrying out communication with called intercom on described communication frequency, discharges described communication frequency after communication finishes.
In a kind of embodiment of device of the present invention, whether the free time comprises the default principle determination frequency of described basis: whether the incoming level of judgement intercom on this frequency in this way, determines this frequency be idle frequence less than default incoming level thresholding.
In a kind of embodiment of device of the present invention, whether the free time comprises the default principle determination frequency of described basis: judge that whether the incoming level of intercom on this frequency is less than default incoming level thresholding, in this way, judge further whether this state duration less than default incoming level thresholding reaches Preset Time, in this way, determine that this frequency is idle frequence.
In a kind of embodiment of device of the present invention, described Preset Time is 0.25-1 second.
In a kind of embodiment of device of the present invention, described default incoming level thresholding is 0.5-1.5 μ V.
The invention has the beneficial effects as follows:
1) improves the availability of frequency spectrum.Traditional frequency assignment mode is that a user applies for a frequency, and each frequency interval is 25kHz, as for satisfying 2000 users, must take the 50MHz bandwidth at least.The intercom communication modes of prior art, to set up communication on the frequency of communication always, yet the communication characteristics of intercom has certain intermittence, in the one-stage communication process, be only effectively taking frequency when in fact only having calling party's PTT push to talk, other do not use frequency spectrum resource constantly, if at this moment still take frequency spectrum resource, then are the wastes to frequency spectrum resource.The present invention takes full advantage of this communication characteristics of intercom, and the system architecture without switching control center of consideration talkback system, by control frequency is set, by the search of each communication to idle frequence, and utilize control frequency to realize the communication assignment is carried out at idle frequence, discharge this communication frequency after communication finishes, thereby guarantee that frequency is for there being use namely to take, do not use the i.e. free time, realized taking full advantage of frequency spectrum resource.After adopting the method, equally to above-mentioned 2000 users, as select when providing 80 frequencies to need communication for it, then only take the 2MHz bandwidth, make the availability of frequency spectrum improve 25 times.That is this kind method and traditional approach comparison, same frequency bandwidth can be that tens times to hundreds of times user serves.
2) can avoid interference.Traditional frequency assignment mode may a frequency assignment have been given an above user in the area of certain limit, just might take simultaneously this frequency and disturbs.Add radio control out of control, some disabled user changes arbitrarily frequency, adds high-power and causes even more serious interference.After adopting the present invention, must after the moment that makes a call is confirmed to be idle frequence, just allow to take, therefore, can avoid interference.Just in case collision can reselect to avoid interference.
Description of drawings
Fig. 1 is the method flow diagram of the raising intercom availability of frequency spectrum of an embodiment of the present invention;
Fig. 2 is calling and called both sides' the interaction diagrams of setting up communication of the raising intercom availability of frequency spectrum of an embodiment of the present invention;
Fig. 3 is calling and called both sides' the interaction diagrams of communication receiving/transmission of the raising intercom availability of frequency spectrum of an embodiment of the present invention.
Embodiment
By reference to the accompanying drawings the present invention is described in further detail below by embodiment.
The main technical problem to be solved in the present invention is, do not having under the prerequisite of switching control center, a kind of method that improves the intercom frequency spectrum resource utilization rate is provided, thereby can satisfies more application demand under limited frequency spectrum resource.
For solving the problems of the technologies described above, the present invention mainly is the conventional operation mode with a frequency of each CU, changes the working method that numerous users share one (or several) control frequency, tens (or hundreds of is individual) communication frequencies into.The some frequencies in the shared frequency range with the different in real time assignments of frequency time can be utilized in numerous radio station of the same area (intercom), frequency efficiency can be greatly improved.
In advance fixedly assignment of frequency assignment, such as traditional intercom frequency assignment method, but frequency efficiency is very low.Also in real time assignment is such as cell mobile communication systems, because the switching control center networking is arranged, which frequency is moved platform and enables, which frequency is idle, and control centre all is as clear as day, so the task of control centre is as long as give each travelling carriage just passable the real-time assignment of idle frequence.And intercom does not have switching control center, obviously can not use for reference the way of cell mobile communication systems.
Adopt multi-frequency to share the addressing technology, namely have m frequency division multiple access frequency for a lot of users jointly, when without the switching control center networking, therefore each intercom in advance and do not know to have which frequency occupied just has one to detect the again problem of assignment in addition of idle frequence.Crucial make a call moment at intercom, know which frequency is taken by other intercom, which frequency is idle, can only detect by the intercom itself that makes a call the judgement electric wave of this frequency whether here and now, has, then for taking; Nothing then is idle.The method that detects can be the electric field strength of this frequency, or receives the incoming carrier level.
The present invention has adopted following concrete technical scheme: the calling subscriber is when pressing intercom PTT touch-call, this intercom need to be in the frequency range of certain delimitation idle frequence of automatic search, by caller radio station scanning frequency successively according to certain rules, and judge that according to default principle described frequency is whether idle, namely detect electric field strength or receive the incoming carrier level, judging and choose idle frequence, is communication frequency with this frequency assignment; And by predetermined one or more public control frequencys, send the selective call signaling by the Called Subscriber address code by this control frequency, notify the callee to forward on this communication frequency to set up communication.This frequency discharged automatically when communication finished.Several frequencies in this frequency range just can be selected for a lot of users like this.
As shown in Figure 1, a kind of method that improves the intercom frequency spectrum resource utilization rate of the embodiment of the invention comprises:
The default principle of caller intercom search rate and basis judges whether described frequency is idle, in this way, is communication frequency by control frequency with this frequency assignment;
The caller intercom carries out communication with called intercom on described communication frequency, discharge described communication frequency after communication finishes.
In the said process, whether the free time comprises according to default principle determination frequency: whether the incoming level of judgement caller intercom on this frequency in this way, determines this frequency be idle frequence less than default incoming level thresholding.
Another kind of whether idle mode comprises according to default principle determination frequency: judge that whether the incoming level of called intercom on this frequency is less than default incoming level thresholding, in this way, judge further whether this state duration less than default incoming level thresholding reaches Preset Time, in this way, determine that this frequency is idle frequence.
Through experiment, default incoming level thresholding is set to 0.5-1.5 μ V and is more suitable data.For improving Accuracy of Judgement, after judging that incoming level at this frequency caller intercom is less than default incoming level thresholding, judge further whether this state duration less than default incoming level thresholding reaches Preset Time, Preset Time need to average out in the speed of judgment accuracy and judgement, in embodiments of the present invention, Preset Time is set as 0.25-1 second.
The service process of intercom can be used as a stochastic service system, can be divided into different classes of by these 3 parts of input process, service regulation and service organization.Input process minute Poisson input (representing with M), fixed length input (representing with D) etc.; Service regulation separate index number distribution service (representing with M), fixed length service (representing with D) etc.; The number n of service organization is the number of frequency in communication system.Represent Poisson input/fixed length service/1 frequency such as M/D/1, M/M/n represents Poisson input/exponential distribution/n frequency.
Thereby for 1 control frequency of the intercom of the embodiment of the invention, its stochastic service system represents by M/D/1, is Poisson input/fixed length service/1 frequency; Or the stochastic service system of a control frequency represents by M/D/a, is service/a frequency of Poisson input/fixed length.And communication frequency, its stochastic service system represents by M/M/n, is Poisson input/exponential distribution/n frequency.
A kind of device that improves the intercom frequency spectrum resource utilization rate of the embodiment of the invention comprises the distribution modulator and the communication module that are arranged on the caller intercom;
Described distribution modulator is used for search rate and judges according to default principle whether described frequency is idle, in this way, is communication frequency by control frequency with this frequency assignment;
Described communication module is used for carrying out communication with called intercom on described communication frequency, discharges described communication frequency after communication finishes.
In a kind of embodiment of device of the present invention, whether the free time comprises the default principle determination frequency of described basis: judge that whether the incoming level of called intercom on this frequency is less than default incoming level thresholding, in this way, judge further whether this state duration less than default incoming level thresholding reaches Preset Time, in this way, determine that this frequency is idle frequence.
In a kind of embodiment of device of the present invention, described default incoming level thresholding is 0.5-1.5 μ V.
In a kind of embodiment of device of the present invention, described Preset Time is 0.25-1 second.
Such as Fig. 2,3, can see, after the start, all intercoms (user radio station) all are parked on the control frequency to be waited for.If there is the user to want to make a call, then key in the address code of Called Subscriber and press the PTT key, at this moment, the caller radio station is Automatic-searching idle frequence in communication frequency just, and the standard of judging idle frequence is that the continuous 0.25-1 of incoming level is lower than 0.5-1.5 μ V second.After finding idle frequence, idle frequence number is recorded in the caller radio station, returns control frequency and sends call signaling, comprises called address code and idle frequence number in this signaling.The called subscriber just the frequency of oneself is transferred on the communication frequency of caller appointment automatically, and caller is also got back on the selected communication frequency from control frequency after control frequency is received the address signaling identical with self address, can begin communication.Can manually carry out power control according to size and the surrounding environment of received field strength in the communication process, after communication is complete, discharge frequency, both sides all return control frequency and wait for.
Concrete, the intercom course of work of the embodiment of the invention is: the user is pressing intercommunication PTT (Push-to-Talk, PTT) during PTT push to talk, this intercom needs idle frequence of automatic search, and notify the callee to the enterprising news that work of this frequency (being communication frequency), this communication frequency discharged automatically when communication finished.Namely be intercom to be set in certain frequency range work, this intercom will judge which frequency is idle according to the incoming level thresholding of receiver when the user presses the speech of PTT key, and requires the recipient to the enterprising news that work of this frequency.When in a certain frequency, the incoming level of receiver is less than the threshold level of 0.5-1.5 μ V, and this state continuance 0.25-1 second that is lower than thresholding, thinks that namely this frequency is idle frequence, and control frequency that just can be by regulation is with this frequency of digital signalling assignment.If the incoming level of receiver is greater than the threshold level of 0.5-1.5 μ V, though perhaps less than 0.5-1.5 μ V this state continuance that is lower than threshold level less than 0.25-1 second, think that namely this frequency is just occupied busy frequency, intercom is just proceeded other frequency carrier level detection, the search idle frequence.Its work reciprocal process of setting up communication can be referring to Fig. 2, wherein intercom 1 is the calling party, intercom 2～N is the callee, the intercom initial condition is for to wait at control frequency, after pressing the PTT calling, then put in certain communication frequency reception, busy if incoming level, is then declared this communication frequency greater than threshold level; Otherwise whether continue to judge duration of state that incoming level is lower than threshold level greater than 1 second, if not, then still declare this communication frequency and hurry; If so, then put the control command that contains this communication frequency, return control frequency and receive, whether judge again incoming level greater than threshold level, in this way, continue to detect and judge, otherwise send out control command, the identical called intercom response of address code this moment.This called intercom is put in the designated communication frequency and is beamed back the bell signal, the intercom that address code is identical is also namely initiated the caller of this calling and is put the backward signalling of receiving the callee in the designated communication frequency, ring-back, callee's ring, calling party and callee begin communication.Then calling party and callee converse according to interaction flow shown in Figure 3, that is, a side gives orders or instructions by PTT, enters emission state, and loose PTT receives words, send out control command.The opposing party's response that address code is identical is given orders or instructions by PTT equally, enters emission state, and loose PTT receives words, sends out control command.At last, a side sends the control command of taking out stitches by reset key, and both call sides returns on the control frequency and waits for.
Compared with prior art, the present invention has following advantage:
Improved the availability of frequency spectrum.Traditional frequency assignment mode is that a user applies for a frequency, and establishing each frequency interval is 25kHz, then for satisfying 2000 users, must take the 50MHz bandwidth at least.And after employing the method, be communication frequency by search rate and assignment idle frequence, and after communication finishes, discharge frequency, thus the utilance of each frequency can be improved.To these 2000 users, calculate by analysis, such as each user's average call every day 3～10 times, 1 control frequency, the percent of call lost is 0.05 o'clock, and 3189～958 user's call transmission signalings can be provided; 79 communication frequencies are done 3 minutes the regular phone time spent of holding time, and the percent of call lost is 0.05, can provide 4920～1476 users to use.Be located in the zone of 3 kilometers radiuses, be generally 2000 mobile subscribers, service quality quite is satisfied with.To these 2000 users, only take the 2MHz bandwidth, make the availability of frequency spectrum improve 25 times.If as the scheduling net, and the transmission of improvement control signal, according to different requirements, set up different control frequencys and communication frequency number, then the availability of frequency spectrum also can improve greatly.Press traffic theory, under the condition of acceptable percent of call lost B, to count n more when the communication frequency that shares, and the total traffic A that it can provide is larger, when each user's average telephone traffic a one timing, pressing m=A/a calculates, its number of users m that can serve is more, i.e. the multiple of availability of frequency spectrum raising is higher, that is this kind method and traditional approach comparison, same frequency bandwidth can be user's service of tens times to hundreds of times.
In addition, traditional frequency assignment mode is in the zone of certain limit, may a frequency assignment give an above user, just might take simultaneously this frequency and disturbs.Add radio control out of control, some disabled user changes arbitrarily frequency, adds high-power and causes even more serious interference.After adopting the present invention, must after the moment that makes a call is confirmed to be idle frequence, just allow to take, even bump once in a while, also can reselect to avoid interference.
The present invention meets the direction of technical development fully, and the method for this raising intercom availability of frequency spectrum comes into operation, and can alleviate the situation of frequency resource anxiety fully, realizes the better service society of radio communication.
Above content is in conjunction with concrete execution mode further description made for the present invention, can not assert that implementation of the present invention is confined to these explanations.For the general technical staff of the technical field of the invention, without departing from the inventive concept of the premise, can also make some simple deduction or replace, all should be considered as belonging to protection scope of the present invention.
Claims (10)
1. a method that improves the intercom frequency spectrum resource utilization rate is characterized in that, comprising:
The default principle of caller intercom search rate and basis judges whether described frequency is idle, in this way, is communication frequency by control frequency with this frequency assignment;
The caller intercom carries out communication with called intercom on described communication frequency, discharge described communication frequency after communication finishes.
2. the method for claim 1 is characterized in that, whether the free time comprises the default principle determination frequency of described basis: whether the incoming level of judgement called intercom on this frequency in this way, determines this frequency be idle frequence less than default incoming level thresholding.
3. the method for claim 1, it is characterized in that, whether the free time comprises the default principle determination frequency of described basis: judge that whether the incoming level of called intercom on this frequency is less than default incoming level thresholding, in this way, judge further whether this state duration less than default incoming level thresholding reaches Preset Time, in this way, determine that this frequency is idle frequence.
4. method as claimed in claim 3 is characterized in that, described Preset Time is 0.25-1 second.
5. such as the arbitrary described method of claim 2-4, it is characterized in that, described default incoming level thresholding is 0.5-1.5 μ V.
6. a device that improves the intercom frequency spectrum resource utilization rate is characterized in that, comprises the distribution modulator and the communication module that are arranged on the caller intercom;
Described distribution modulator is used for search rate and judges according to default principle whether described frequency is idle, in this way, is communication frequency by control frequency with this frequency assignment;
Described communication module is used for carrying out communication with called intercom on described communication frequency, discharges described communication frequency after communication finishes.
7. device as claimed in claim 6 is characterized in that, whether the free time comprises the default principle determination frequency of described basis: whether the incoming level of judgement called intercom on this frequency in this way, determines this frequency be idle frequence less than default incoming level thresholding.
8. device as claimed in claim 6, it is characterized in that, whether the free time comprises the default principle determination frequency of described basis: judge that whether the incoming level of called intercom on this frequency is less than default incoming level thresholding, in this way, judge whether this state duration less than default incoming level thresholding reaches Preset Time, in this way, determine that this frequency is idle frequence.
9. device as claimed in claim 8 is characterized in that, described Preset Time is 0.25-1 second.
10. such as the arbitrary described device of claim 7-9, it is characterized in that, described default incoming level thresholding is 0.5-1.5 μ V.
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| CN 201110186388 CN102869019A (en) | 2011-07-05 | 2011-07-05 | Method and device for improving spectrum resource utilization rate of interphones |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104779968A (en) * | 2015-05-07 | 2015-07-15 | 泉州欧讯电子有限公司 | Interphone with broadband frequency testing function and communication system thereof |
| CN106452612A (en) * | 2016-10-14 | 2017-02-22 | 北京小米移动软件有限公司 | Intercom frequency-band state detection method and device, intercom equipment and electronic equipment |
| CN106506031A (en) * | 2016-11-14 | 2017-03-15 | 北京小米移动软件有限公司 | The method and device of adjustment talk back equipment frequency |
| CN107465964A (en) * | 2017-09-05 | 2017-12-12 | 东莞明泰电讯设备有限公司 | The communication means and device of talkback system |
| CN107997580A (en) * | 2016-12-08 | 2018-05-08 | 芜湖美的厨卫电器制造有限公司 | Water fountain and its water tank detection method |
| CN110504980A (en) * | 2018-05-18 | 2019-11-26 | 海能达通信股份有限公司 | Digital walkie-talkie online test method, digital walkie-talkie and storage device |
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- 2011-07-05 CN CN 201110186388 patent/CN102869019A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104779968A (en) * | 2015-05-07 | 2015-07-15 | 泉州欧讯电子有限公司 | Interphone with broadband frequency testing function and communication system thereof |
| CN106452612A (en) * | 2016-10-14 | 2017-02-22 | 北京小米移动软件有限公司 | Intercom frequency-band state detection method and device, intercom equipment and electronic equipment |
| CN106506031A (en) * | 2016-11-14 | 2017-03-15 | 北京小米移动软件有限公司 | The method and device of adjustment talk back equipment frequency |
| CN106506031B (en) * | 2016-11-14 | 2019-03-22 | 北京小米移动软件有限公司 | Adjust the method and device of talk back equipment frequency |
| US10439660B2 (en) | 2016-11-14 | 2019-10-08 | Beijing Xiaomi Mobile Software Co., Ltd. | Method and device for adjusting frequencies of intercom apparatuses |
| CN107997580A (en) * | 2016-12-08 | 2018-05-08 | 芜湖美的厨卫电器制造有限公司 | Water fountain and its water tank detection method |
| CN107465964A (en) * | 2017-09-05 | 2017-12-12 | 东莞明泰电讯设备有限公司 | The communication means and device of talkback system |
| CN110504980A (en) * | 2018-05-18 | 2019-11-26 | 海能达通信股份有限公司 | Digital walkie-talkie online test method, digital walkie-talkie and storage device |
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Application publication date: 20130109 |