CN101902746A - Method for dynamically allocating frequencies among base stations in trunking communication system and implementation system thereof - Google Patents
Method for dynamically allocating frequencies among base stations in trunking communication system and implementation system thereof Download PDFInfo
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- CN101902746A CN101902746A CN 201010223322 CN201010223322A CN101902746A CN 101902746 A CN101902746 A CN 101902746A CN 201010223322 CN201010223322 CN 201010223322 CN 201010223322 A CN201010223322 A CN 201010223322A CN 101902746 A CN101902746 A CN 101902746A
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Abstract
The invention relates to the technical field of communication, in particular to a method for dynamically allocating frequencies among base stations in a trunking communication system and a special implementation system thereof. The invention comprises the following steps: all frequency points of the trunking communication system are centrally managed by a frequency point allocation control center in a network; a handheld transceiver applies a frequency point to the frequency point allocation control center through a base station control channel; and the frequency point allocation control center allocates the frequency point to the handheld transceiver, and the frequency point is released after communication signals is terminated. The special implementation system mainly comprises a frequency point allocation control center unit system, the base station control channel and a speech channel. On the premise that the quantity of hardware devices is unchanged, the invention satisfies the application requirement for common-frequency broadcasting and increases the utilization ratio of system frequency points and devices.
Description
Technical field
The present invention relates to communication technical field, especially relate to a kind of method and special implementing system thereof of dynamically allocating frequencies among base stations in trunking communication system.
Technical background
At present, along with the high speed development of urban construction, the capacity of the wireless dispatching communication network in many cities all needs continuous expansion, but all is faced with the situation of frequency resource scarcity.Because the restriction of frequency resource, base station capacity and wireless coverage just can't be continued to increase in these cities.Analyze wherein reason, mainly be because current wireless dispatching communication network mostly adopts channel and the man-to-man fixedly frequency point setting of frequency mode, because each channel of base station all needs to take a frequency, under not same situation about broadcasting, the frequency quantity that system need take is the total quantity of channel.And in real work, each base station degree of being busy with one's work at one time is different, and the frequency amount that needs does not wait yet, and the situation that all channels are worked simultaneously seldom takes place especially.Following situation so just usually takes place: at one time, the base station frequency point in the frequent zone of communication lacks, and the base station frequency point in the less zone of communicating by letter then is in idle state.According to statistics, in a cluster network, have at least the frequency resource of half not to be fully utilized in each base station, network capacity extension problem has been caused great puzzlement.Therefore, for the reasonable utilization that makes the communication network, permanent development, the technical scheme of seeking the efficient operation of a frequency has been the important topic that pendulum solves one of many cluster of base stations field of wireless communications outstanding urgent need.
Summary of the invention
In order to overcome above-mentioned technological deficiency, the invention provides a kind of method of dynamically allocating frequencies among base stations in trunking communication system, this method adopts dynamic frequency allocation, and each channel can plan as a whole to distribute frequency on demand according to working condition.Its advantage is: under the constant situation of hardware device quantity, promptly satisfied the application requirements of common-frequency simulcasting, improved system's frequency and usage ratio of equipment again.
For this reason, technical scheme of the present invention comprises the steps:
A. all frequencies of trunked communication system are by " frequency point allocation control center " unified management of network.
B. frequency procedure to apply: when the application of hand platform is called out, send frequency application signal to " frequency point allocation control center " by the base stations control channel.
C. frequency point allocation step: after " frequency point allocation control center " received frequency application signal, to the idle frequency of base stations control channel allocation, idle voice channel and corresponding hand platform entered this frequency and carry out voice communication service in the base stations control Channel Assignment station.
D. frequency release steps: after conversation signal finished, the voice channel that participates in conversation discharged frequency, and the informing base station control channel, by base stations control channel notification frequency point allocation control center, confirms the operating state of this frequency.
As another kind of technical scheme, the step C of such scheme is specially: after " frequency point allocation control center " receives frequency application signal, idle frequency point allocation is given the base stations control channel of application; Certain voice channel in the base stations control Channel Assignment base station is adjusted to the frequency that distributes gained with frequency, and is broadcast to the hand platform that participates in this conversation, makes the hand platform also frequency be adjusted to this frequency and converses.
Be better implement the present invention, also specialized designs special-purpose support implementation system, this system comprises base station network and hand platform, it is characterized in that, described system also comprises:
1. frequency point allocation control center apparatus system is used to realize the unified management to all frequencies of trunked communication system;
2. the base stations control channel is mainly used in application or discharges working frequency points, and the operating state of control voice channel;
3. voice channel is mainly used in voice call, use or discharges working frequency points.
More than three kinds of devices participate in trunked communication system networks, states such as the centralized management of network enabled frequency, distribution, work.
Description of drawings
Fig. 1 is the structural representation of the inventive method special implementing system.
Fig. 2 is the flow chart that the inventive method is set up calling procedure.
Fig. 3 is the flow chart of the inventive method disconnect process.
Fig. 4 is the explanation schematic diagram that the frequency utilance is optimized effect after employing the inventive method.
Fig. 5 is the explanation schematic diagram that the regional management of frequency utilance is optimized effect after employing the inventive method.
Embodiment
Core idea of the present invention is, by to the unified dynamic management of frequency resource, makes frequency and channel separation, overcomes the technological deficiency of original frequency and fixed channel binding, to realize the maximum using to the frequency resource.
The present invention is described in further detail below in conjunction with accompanying drawing:
As shown in Figure 1, support the implementation system of the inventive method to comprise base station network and hand platform, this system also is provided with " frequency point allocation control center " apparatus system that all frequencies of wireless dispatching communication group system is carried out unified management; Be mainly used in application or discharge working frequency points, and the base stations control channel of control voice channel operating state; Be mainly used in the voice channel of voice call, use or release working frequency points.More than three kinds of devices participate in the trunked communication system networks, work in coordination, support the states such as centralized management, distribution, work of frequency.
As shown in Figure 2, set up the flow process of calling out and mainly comprise frequency procedure to apply and frequency point allocation step.Process is as follows:
Hand platform A keeps receiving the signal of base stations control channel 1 at usual holding state, when hand platform A presses PTT application calling, base stations control channel 1 is received call request, promptly by cable network to frequency point allocation control center application frequency, frequency point allocation control center utilizes situation to distribute reasonable frequency according to current frequency, and simultaneously by cable network to base stations control channel 1,2,3 send the order that distributes corresponding frequency, base stations control channel 1,2,3 receive the frequency point allocation order after, idle channel in the commander base station is adjusted working frequency points to corresponding frequency, and simultaneously to this base station overlay area broadcasting frequency point information, allow relevant hand platform that working frequency points is adjusted to corresponding frequency, each base station all has specific calling channel to be operated in specific frequency like this, keeps communicating by letter with the hand platform that participates in this time conversation.
As shown in Figure 3, the disconnect process of calling mainly comprises the frequency release steps.Flow process is as follows:
When this end of conversation, promptly the PTT of hand platform A discharges, and the calling channel that participates in this conversation detects call signal to be finished, i.e. informing base station control channel 1 this conversation has finished and broken away from working frequency points.Then, base stations control channel 1 informs that by cable network this end of conversation of frequency point allocation control center can discharge this working frequency points, after frequency point allocation control center is received information, broadcast this information, base stations control channel 2, the 3 notification call channels of this time conversation of letting on break away from working frequency points, and broadcast wireless signal, make the hand platform that participates in this conversation return the control channel frequency, keep and the base stations control channel communication.So far, calling procedure finishes.
Below frequency utilance optimization effect after adopting the inventive method is illustrated for example, as shown in Figure 4, according to traditional group system design, each channel of each base station adopts fixedly frequency, and 3 base stations have 18 channels altogether, just need take 18 pairs of frequencies.But in real work, the situation that 18 channels are worked simultaneously is few, and such 18 channels take 18 frequencies for a long time and just seem very unreasonable.Adopt the dynamic frequency allocation technology, each channel only just obtains working frequency points from frequency point allocation control center in needs work, the current work load of the shared frequency point data of system and system becomes 1 to 1 relation same the time, makes the frequency resource obtain the most effective use.
Simultaneously, the dynamic frequency allocation of this system combines with the demand of broadcasting together and also more is tending towards reasonable, as shown in Figure 4, each channel of supposing each base station adopts fixedly frequency, requirement according to common-frequency simulcasting, the maximum case in call communication zone is the whole system overlay area, and it is identical then to need each base station to have identical frequency number and frequency point data.There are 6 channels each base station among the figure, then at one time, can only use 6 groups of frequencies in the system coverage area at most, also just has only 6 group calls in several to carry out simultaneously.Though to take frequency few in system like this, can't satisfy practical application request.
If adopt dynamic frequency allocation, each channel can distribute frequency according to working condition, be that different channels can work in different frequencies, Nei working group's quantity can reach the total quantity of channel at most at one time, so just can realize under the constant situation of hardware device quantity that more conversation work carries out simultaneously, both satisfy the application requirements of common-frequency simulcasting, improved utilization rate of equipment and installations again.
The illustrating for example of regional management that shown in Figure 5 is adopts frequency utilance after the inventive method, as shown in the drawing, regional A and area B are different to the demand of frequency resource at one time.According to the conventional cluster network design, frequency point allocation is to become 1 to 1 relation with this regional channel quantity, promptly distributes frequency just to need almost equal frequency to use for above-mentioned two zones according to conventional method.Demand to frequency is big like this, and the frequency resource is all shared by hardware channel at one time, when channel is in non operating state, is exactly the significant wastage to the frequency resource.Improving frequency efficiency just needs to use the method for dynamic frequency allocation, says that the frequency resource puts together, and distributes frequency according to the frequency needs state of special time.Suppose sometime, zone A needs 6 pairs of frequencies, and area B only needs 2 pairs of frequencies, and the needed frequency of whole like this network has only 8 pairs, with respect to minimum 12 pairs of frequencies of conventional method, dynamic frequency allocation is very tangible to the raising effect of frequency resource utilization.
Claims (3)
1. the method for dynamically allocating frequencies among base stations in the trunked communication system is characterized in that, the step of this method comprises:
A. all frequencies of trunked communication system are by " frequency point allocation control center " unified management of network;
B. frequency procedure to apply: when the application of hand platform is called out, send frequency application signal to " frequency point allocation control center " by the base stations control channel;
C. frequency point allocation step: after " frequency point allocation control center " received frequency application signal, to the idle frequency of base stations control channel allocation, idle voice channel and corresponding hand platform entered this frequency and carry out voice communication service in the base stations control Channel Assignment station;
D. frequency release steps: after conversation signal finished, the voice channel that participates in conversation discharged frequency, and the informing base station control channel, by base stations control channel notification frequency point allocation control center, confirms the operating state of this frequency.
2. the method for claim 1 is characterized in that, described step C is specially:
After " frequency point allocation control center " receives frequency application signal, idle frequency point allocation is given the base stations control channel of application; Certain voice channel in the base stations control Channel Assignment base station is adjusted to the frequency that distributes gained with frequency, and is broadcast to the hand platform that participates in this conversation, makes the hand platform also frequency be adjusted to this frequency and converses.
3. realize the trunked communication system of claim 1 or 2 described methods, comprise base station network and hand platform, it is characterized in that described system also comprises:
-frequency point allocation control center apparatus system is used for the unified management to all frequencies of trunked communication system;
-base stations control channel is used for application or discharges working frequency points, and the operating state of control voice channel;
-voice channel is used for voice call, use or discharges working frequency points.
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Cited By (5)
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| CN103037447A (en) * | 2012-12-21 | 2013-04-10 | 深圳市国电科技通信有限公司 | Adaptive duplexing method of dynamic bandwidth allocation in wireless communications system |
| CN103959894A (en) * | 2011-10-14 | 2014-07-30 | 高通股份有限公司 | Apparatuses and methods for facilitating simulcasting and de-simulcasting with a plurality of base stations |
| CN109769215A (en) * | 2019-03-19 | 2019-05-17 | 福建科立讯通信有限公司 | A kind of shared frequency point resource system and method for Digital Clustering and simulation cluster |
| CN111654921A (en) * | 2020-04-13 | 2020-09-11 | 广州维德科技有限公司 | Cluster base station communication method and cluster base station communication system |
| CN114390372A (en) * | 2022-01-21 | 2022-04-22 | 福建北峰通信科技股份有限公司 | Intelligent balanced multi-channel talkback networking system with activation authentication |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103959894A (en) * | 2011-10-14 | 2014-07-30 | 高通股份有限公司 | Apparatuses and methods for facilitating simulcasting and de-simulcasting with a plurality of base stations |
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| CN103037447A (en) * | 2012-12-21 | 2013-04-10 | 深圳市国电科技通信有限公司 | Adaptive duplexing method of dynamic bandwidth allocation in wireless communications system |
| CN109769215A (en) * | 2019-03-19 | 2019-05-17 | 福建科立讯通信有限公司 | A kind of shared frequency point resource system and method for Digital Clustering and simulation cluster |
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| CN114390372A (en) * | 2022-01-21 | 2022-04-22 | 福建北峰通信科技股份有限公司 | Intelligent balanced multi-channel talkback networking system with activation authentication |
| CN114390372B (en) * | 2022-01-21 | 2023-09-26 | 福建北峰通信科技股份有限公司 | Intelligent balanced multichannel intercom networking system with activation authentication |
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Application publication date: 20101201 |