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CN101014156A - Digital cluster communication method with the control channel frequency hopping function - Google Patents

Digital cluster communication method with the control channel frequency hopping function Download PDF

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Publication number
CN101014156A
CN101014156A CNA2007100728983A CN200710072898A CN101014156A CN 101014156 A CN101014156 A CN 101014156A CN A2007100728983 A CNA2007100728983 A CN A2007100728983A CN 200710072898 A CN200710072898 A CN 200710072898A CN 101014156 A CN101014156 A CN 101014156A
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frequency hopping
frequency
base station
channel
synchronization
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CN100464612C (en
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姚忠邦
杨德刚
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Synertone Communication Technology Ltd
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SYNERGY SMARTEND COMMUNICATION TECHNOLOGY (SHENZHEN) Co Ltd
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Abstract

一种具有控制信道跳频功能的数字集群通信方法，包括集群模式和直通模式，前者是指存在信息基础设施(如：区域控制器、基站等)时的工作模式，它又可分为单基站模式和多基站模式(此时，存在区域控制器)；后者是指不存在信息基础设施、只有移动台时的工作模式。跳频包括控制信道跳频和业务信道跳频，采用时分多址(TDMA)体制，其中，Nts个时隙(Nts□4)构成一帧空中帧，Nsf帧空中帧构成一帧超帧，在超帧中某一帧或几帧可以用来传输随路信令，在每个时隙内，根据当前逻辑信道的不同填充不同信息。在一个载波的一帧超帧时间内可以构成一帧完整的跳频同步帧。跳频方式采取时隙跳频的方式，每个时隙所采用的跳频频率集和跳频图案均可以不同。不同的跳频频率集和不同的跳频图案可以构成不同的逻辑信道，用于发送不同的信息。

A digital trunking communication method with control channel frequency hopping function, including trunking mode and direct mode, the former refers to the working mode when information infrastructure (such as: regional controller, base station, etc.) exists, and it can be divided into single base station Mode and multi-base station mode (at this time, there is a regional controller); the latter refers to the working mode when there is no information infrastructure and only mobile stations. Frequency hopping includes control channel frequency hopping and traffic channel frequency hopping, and adopts the time division multiple access (TDMA) system, wherein, N ts time slots (N ts □4) constitute a frame of air frame, and N sf frames of air frame constitute a frame of super A certain frame or several frames in a super frame can be used to transmit channel-associated signaling, and in each time slot, different information is filled according to the current logical channel. A complete frequency hopping synchronization frame can be formed within one superframe time of one carrier. The frequency hopping mode adopts a time slot frequency hopping mode, and the frequency hopping frequency set and frequency hopping pattern used in each time slot can be different. Different frequency hopping frequency sets and different frequency hopping patterns can constitute different logical channels for sending different information.

Description

Digital cluster communication method with control channel frequency hopping function
Technical field
The present invention relates to wireless communication technology, mainly be meant a kind of digital cluster communication method with control channel frequency hopping function.
Background technology
Frequency hopping is one of the most frequently used spread spectrum mode, its operation principle is meant that the carrier frequency of receiving-transmitting sides transmission signals is according to being scheduled to the communication mode that rule is carried out Discrete Change, that is to say that the carrier frequency of using in the communication is subjected to pseudorandom to change the control of sign indicating number and random jump.On time domain, Frequency Hopping Signal is a multifrequency frequency shift keyed signals; From frequency domain, the frequency spectrum of Frequency Hopping Signal one on very wide frequency band with the unequal interval random jump.
Compare with fixed communication frequently, more hidden also being difficult to of frequency hopping communications intercepted and captured.As long as the other side does not know the rule of carrier frequency saltus step, just be difficult to intercept and capture Content of Communication.Simultaneously, frequency hopping communications also has good antijamming capability, even there is the part frequency disturbed, still can communicate by letter normally on other not disturbed frequencies.And because frequency-hopping communication system is instantaneous narrowband systems, therefore, it is easy to the narrow-band communication system compatibility with other, such as: frequency hopping radio set can with radio station, the arrowband intercommunication of routine, so, help the level and smooth renewal of equipment.
At present, in digital clustering communication system, FHMA (the Frequency Hopping MultipleAccess that has only Israel, Frequency Hopping Multiple Access FHMA) to have adopted frequency hopping, hop rate be 150 jumping/seconds in system (this system be in the ITU of International Telecommunications Union seven kinds of international digital cluster communication standards of recommending a kind of).And, in the FHMA communication system, control channel not frequency hopping, only the Traffic Channel frequency hopping arranged.Here, business information such as " control channel ", data non-voice for control, management information with regard to the information that is meant this channel; Corresponding, " Traffic Channel " is business information such as speech, data with regard to the information that is meant this channel.In the FHMA system, the control channel of each base station is the wireless channel of pre-configured fixedly frequency, control channel and the base station of travelling carriage by fixing frequency carried out signaling and linked up, and carries out normal service communication by control channel notice travelling carriage by the base station on some frequency hopping Traffic Channels then.And the cycle of the Traffic Channel frequency hop sequences in the FHMA system is that fix rather than pseudorandom, can repeat once every 72 frames.
In public's cellular radio Communication system GSM, the base station also can work in the frequency hopping mode, identical with the FHMA system, and control channel also is a frequency hopping not under the frequency-hopping mode of gsm system, has only Traffic Channel to adopt the frequency hopping mode.
In fact, because the channel quality of control channel is extremely important for the normal operation of entire wireless communication system, therefore not the frequency hopping frequency diversity that causes control channel to enjoy to bring and the benefit of interference diversity of control channel owing to frequency-hopping spread spectrum, make the antijamming capability of control channel be weaker than Traffic Channel, thereby may occur under extreme case that control channel is seriously disturbed and situation that the communication of Traffic Channel can't normally be carried out at all.And control channel not frequency hopping makes the antijamming capability of whole system, particularly anti-ly has a mind to interference capability and reduces greatly.
Summary of the invention
The purpose of this invention is to provide a kind of digital cluster communication method with control channel frequency hopping function, by the frequency hopping networking under control channel frequency hopping and the control channel frequency hopping situation is set, realize the communication mode of control channel and the equal frequency hopping of Traffic Channel in the digital clustering communication system, solved the problem that control channel in the existing trunked communication system can not frequency hopping.
Realize that technical scheme of the present invention is: this communication means comprises cluster mode and direct mode operation, and its major technique is:
Cluster mode comprises single base station networking and many base station networkings, when wherein single base station networking is worked, the base station produces frequency hopping synchronizing frequency collection and frequency hopping communications frequency set according to certain algorithm, recycles the concentrated frequency of frequency hopping synchronizing frequency then and send hopping synchronization information on frequency hopping synchronizing channel and frequency hopping service channel; When many base station networkings are worked, zone controller (claiming Regional Control Center again) produces frequency hopping synchronizing frequency collection and frequency hopping communications frequency set according to certain algorithm, then they together are dispensed to each base station in company with the frequency hopping running parameter, the frequency hopping running parameter that each base station is set according to zone controller recycles and distributes the concentrated frequency of frequency hopping synchronizing frequency that obtains to send hopping synchronization information on frequency hopping synchronizing channel and frequency hopping service channel; For travelling carriage, no matter be single base station networking or many base station networkings, each travelling carriage is all kept the concordance list of all frequencies of whole system, after the start, when working in cluster mode, go out frequency hopping synchronizing frequency collection according to certain algorithm computation, recycle the frequency scanning wireless channel in this frequency set then, up to receiving the hopping synchronization information that the base station sends, it is synchronous after this just can to obtain frequency hopping from the base station, and then communicates with it;
When leading directly to mode of operation, travelling carriage goes out local frequency hopping synchronizing frequency collection and frequency hopping communications frequency set according to certain algorithm computation, when accepting state, travelling carriage recycles the frequency scanning wireless channel that the frequency hopping synchronizing frequency is concentrated, if find to have travelling carriage to its transmission information, then from the frequency hopping synchronizing channel of transmit leg or frequency hopping service channel, obtain hopping synchronization information, communicate with it then; When transmit status, travelling carriage at first recycles the concentrated frequency of frequency hopping synchronizing frequency and send hopping synchronization information on the frequency hopping synchronizing channel, enter normal communication state then, simultaneously, still intermittent cyclic uses frequency hopping synchronizing frequency collection to send hopping synchronization information as duties information when normal communication state, on the frequency hopping service channel, send, to realize the slow networking of frequency hopping.
This technical scheme also comprises:
Described frequency hopping comprises control channel frequency hopping and Traffic Channel frequency hopping, adopts time division multiple access (TDMA) system, wherein, and the N of a carrier wave TsIndividual time slot (N Ts4) formation one frame air frame, N SfThe frame air frame constitutes a frame superframe, a certain frame or a few frame can be used for transmitting channel associated signalling in superframe, in each time slot, fill different information according to the difference of present frame content, and in the frame superframe time of a carrier wave, transmission information can be formed the complete frequency hopping synchronization frame of a frame.
Described frequency hopping adopts the method for time slot frequency hopping, that is: the frequency hopping frequency set that each time slot adopted all can be different with frequency hopping pattern, different frequency hopping frequency sets constitutes different logic channels with different frequency hopping patterns, be used for sending different information, such as: some time slot adopts frequency hopping synchronizing frequency collection and frequency hopping synchronization pattern, and then these time slots have just constituted the frequency hopping synchronizing channel; Some time slot adopts frequency hopping communications frequency set and Traffic Channel frequency hopping pattern, and then they have just constituted Traffic Channel.
Frequency hopping mode under the described cluster mode comprises the synchronous and proper communication of frequency hopping, wherein frequency hopping realizes by obtain hopping synchronization information from frequency hopping synchronizing channel or frequency hopping service channel synchronously, travelling carriage obtain frequency hopping synchronously after, can enter normal course of communications.
Described frequency hopping comprises synchronously:
The hopping scheme of frequency hopping synchronizing channel and frequency hopping service channel is: the frequency hopping frequency set adopts frequency hopping synchronizing frequency collection (comprising some to the uplink and downlink frequency), frequency hopping pattern to adopt the frequency hopping pattern (claiming frequency hop sequences again) of " sequential loop jumping ";
After the mobile platform started, if work in cluster mode, the frequency hopping that circulates of the frequency hopping synchronizing frequency collection under the cluster mode that calculates according to this locality then, search receives the hopping synchronization information of base station, according to the majority decision principle, the hopping synchronization information of acquisition current base station is also followed the tracks of current base station and is carried out frequency hopping;
The base station will be in Common Control Channel frequency parameter, the synchronizing information of broadcast transmission adjacent base station, like this, travelling carriage has also just obtained frequency parameter, the synchronizing information of adjacent base station simultaneously.
Described handover comprises:
Travelling carriage is with when communicate by letter in base station 1, the frequency parameter and the hopping synchronization information such as TOD of reception 1 relevant adjacent base station that sends from the base station, after obtaining this information, judge the signal strength signal intensity of the frequency hopping synchronizing channel of adjacent base station by the mode of synchronous scanning (synchronous network) or slow scanning (asynchronous networking), this scanning can be carried out simultaneously with communicating by letter of Traffic Channel, carries out in the time of also can utilizing Traffic Channel idle;
Travelling carriage judges whether that according to a certain handover thresholding that sets in advance needs carry out handover then by judging the signal strength signal intensity from each adjacent base station, if need, then carries out following operation:
1) after handover is carried out in the travelling carriage decision, sends soft handover claim frame (identifier, the handoff request and the base station identifier that will switch, that is: the identifier of base station 2 that comprise base station 1), after receive base station 1, this request is sent to base station 2 to base station 1;
2) after base station 2 receives this request, judge whether that enough channel resources can be for utilizing;
3) if there are enough channel resources base station 2, then accept this handoff request, and distribute respective resources to give mobile radio station, simultaneously with this information informing base station 1;
4) base station 1 sends handover information (comprising the traffic channel information of distributing to travelling carriage) to travelling carriage;
5) after certain scheduled time of interval, travelling carriage is proceeded to communicate by letter by the Traffic Channel of base station 2 with base station 2.
If need carry out direct-cut operation,, therefore, realize proper communication thereby can directly on the Common Control Channel of adjacent base station, initiate to insert request equally then because travelling carriage has obtained the frequency parameter and the hopping synchronization information of adjacent base station by current base station.
Frequency hopping mode during described proper communication comprises: obtain the hopping synchronization information of base station at travelling carriage after, insert will on Common Control Channel, taking place alternately of request, channel allocation signaling, and then just can allow both sides on a certain Traffic Channel, carry out proper communication in the frequency hopping mode by both sides' Signalling exchange.
Frequency hopping mode under the described direct mode operation is meant the communication employing principal and subordinate working method between the travelling carriage, a side who at first makes a call is a main website, the recipient is a slave station, the synchronous needed TOD information of frequency hopping is sent by main website, whole communication process is divided into frequency hopping synchronous phase and proper communication stage, and wherein frequency hopping comprises synchronously:
The frequency that main website concentrates with the frequency hopping synchronizing frequency according to the mode that circulation is jumped sends a certain predefined frame number continuously;
Slave station only otherwise in normal communication state, then it just concentrates optional frequency to be in the monitoring channel state from the frequency hopping synchronizing frequency, if receive certain frequency hopping synchronization frame, judges then whether this information is correct, as if correctly then separating jumping; If the frequency hopping synchronization frame that receives is incorrect, but incoming level (RSSI) surpasses a certain thresholding, noise really admits a fault, then the order according to the synchronizing frequency collection skips to next frequency reception next frame frequency hopping synchronization frame, follow main website simultaneously and carry out frequency hopping, if the selected a certain frequency of slave station does not receive effective frequency hopping synchronization frame in a certain scheduled time, then the other frequency of selective sequential receives again.
Described frequency hopping comprises synchronously: if the called call answering that carries out of information requirements in the frequency hopping synchronization frame of main website, then from stand in correctly receive hopping synchronization information after, send response message immediately to main website, after main website is received, confirmation is replied in transmission, after both sides shake hands and finish, enter the proper communication stage.
The asynchronous quadrature networking of described cluster mode comprises the mode of taking frequency-division section networking, channeling, and neighbor cell is distinguished by using different frequency hopping frequency set, is just distinguished by the mode of frequency quadrature; And the different user in the same sub-district is owing to being synchronized with common base station, so they can distinguish by the frequency hop sequences of synchronized orthogonal.
The synchronized orthogonal networking of described cluster mode comprises the mode of taking the whole network to use same frequency hopping frequency set, and the channeling ratio is 1, and the frequency hopping frequency points of each sub-district is N, wherein
Fixedly setting up under the situation, the mode that the whole network adopts synchronously can have two kinds: the whole network under wired mode is synchronous, as: by SDH mechanism; Big-dipper satellite time service by GPS or China is synchronous;
In base station " motion " or the base station is motor-driven sets up under the situation, the mode that the whole network adopts synchronously is that the time service of GPS or big-dipper satellite is synchronous;
Synchronous for frequency hopping, for the hopping control channel that guarantees each base station (sub-district) in the synchronized orthogonal net is a quadrature, the frequency hopping synchronizing frequency is concentrated and should be comprised 3 frequencies at least;
Simultaneously, for fast synchronously, improve the frequency hopping synchronizing speed, the frequency points that the frequency hopping synchronizing frequency is concentrated should be lacked as far as possible, and suggestion is 3,5,7 or 12.
The frequency hopping synchronizing frequency collection under the described cluster mode and the generation of frequency hopping communications frequency set and distribution comprise when digital clustering communication system works in many base station modes, produce the frequency hopping frequency set by Regional Control Center, notify each base station with frequency hopping frequency set information then; When digital clustering communication system works in single base station mode, produce required frequency hopping synchronizing frequency collection and frequency hopping communications frequency set by the base station; When travelling carriage is in straight-through mode of operation, produce frequency hopping synchronizing frequency collection and frequency hopping communications frequency set by travelling carriage self.
The beneficial effect that the present invention has: adopt the present invention, digital clustering communication system can not only improve frequency efficiency, and the more important thing is, no matter at cluster mode still under direct mode operation, control channel and Traffic Channel have all realized frequency hopping, thereby can improve the antijamming capability of entire wireless communication system, therefore be particularly suitable for interference ratio than in serious environmental or the military communication environment.
Description of drawings
Fig. 1 is zone controller of the present invention (claiming Regional Control Center again), base station and travelling carriage schematic diagram, wherein connect by wireless mode between MS and the BS, and both can be between BS and the zone controller by wireless mode, also can connect by wired mode.
Fig. 2 is that EM equipment module of the present invention constitutes schematic diagram.
Fig. 3 is TOD of the present invention (Time of Day) information schematic diagram.
Fig. 4 is an air frame schematic diagram of the present invention.
Fig. 5 is the mapping relations schematic diagram of physical channel and logic channel under the cluster mode of the present invention.
Fig. 6 is the mapping relations schematic diagram of physical channel and logic channel under the direct mode operation of the present invention.
Fig. 7 is the slave station schematic flow sheet when need not called call answering under the direct mode operation of the present invention.
Fig. 8 is the slave station schematic flow sheet when needing called call answering under the direct mode operation of the present invention.
Fig. 9 is a master/slave station communication process schematic flow sheet under the direct mode operation of the present invention.
Figure 10 is carrier wave of the present invention/time slot schematic diagram.
Embodiment
The present invention will be further described below in conjunction with accompanying drawing:
1, the technical problem that will solve
In FHMA (Frequency Hopping Multiple Access, Frequency Hopping Multiple Access FHMA) digital clustering communication system, control channel adopts frequently fixed, only has Traffic Channel to adopt frequency hop spread spectrum.The shortcoming of this scheme is that anti-to have a mind to interference performance relatively poor, control channel or not may not take place during frequency hopping seriously to be disturbed and the still good situation of Traffic Channel quality, because control channel lost efficacy, therefore will cause this moment the entire wireless communication system can't operate as normal.
At this problem, the present invention proposes a kind of control channel frequency-hopping method, solve the problem of frequency hopping networking under the situation of control channel frequency hopping, thereby realized control channel and the equal frequency hopping of Traffic Channel in the digital clustering communication system.And the user that the method that the present invention proposes can be implemented under the direct mode operation communicates by the frequency hopping mode.The communication equipment that the present invention relates to comprises zone controller, base station (BS) and travelling carriage (MS), as shown in Figure 1.
The technical scheme of 2, dealing with problems
2.1 general introduction
For frequency hopping communications, frequency hopping is very important key technology synchronously.And for large-scale digital clustering communication system, under the situation of control channel frequency hopping, except frequency hopping was synchronous, frequency hopping networking and handover also were very important key technologies.The present invention proposes several different frequency hopping network-building methods, and provided the method for handover under the situation of many base stations.
When digital clustering communication system is in the frequency hopping mode of operation, send corresponding frequency hopping mode parameter by zone controller to each BS, these parameters comprise frequency point allocation mode, frequency hopping networking mode etc., and each BS just can carry out work according to corresponding frequency parameter then.The module of each equipment constitutes as shown in Figure 2.
2.2 the frequency hopping networking under the cluster mode
The frequency hopping networking mode that adopts among the present invention has asynchronous quadrature networking and synchronized orthogonal networking dual mode.Below narrate it respectively.
2.2.1 asynchronous quadrature networking
Digital clustering communication system is taked the mode of frequency-division section networking, channeling, can consider that frequency duplex factor as one is 1/3.At this moment, the frequency points of each sub-district is N/3, that is: neighbor cell is distinguished by using different frequency hopping frequency set, is just distinguished by the mode of frequency quadrature; And the different user in the same sub-district is owing to being synchronized with common base station, so they can distinguish by the frequency hop sequences of synchronized orthogonal.
2.2.2 synchronized orthogonal networking
Digital clustering communication system takes the whole network to use the mode of same frequency hopping frequency set, and the channeling ratio is 1.At this moment, the frequency hopping frequency points of each sub-district is N.
Fixedly setting up under the situation, the mode that the whole network adopts synchronously can have two kinds: the whole network under wired mode is synchronous, as: by SDH mechanism; Big-dipper satellite time service by GPS or China is synchronous.
In base station " motion " or the base station is motor-driven sets up under the situation, the mode that the whole network adopts synchronously is that the time service of GPS or big-dipper satellite is synchronous.
For frequency hopping was synchronous, for the hopping control channel that guarantees each base station (sub-district) in the synchronized orthogonal net is a quadrature, the frequency hopping synchronizing frequency was concentrated and should be comprised 3 frequencies at least.
Simultaneously, for fast synchronously, improve the frequency hopping synchronizing speed, the frequency points that the frequency hopping synchronizing frequency is concentrated should be lacked as far as possible, and suggestion is 3,5,7 or 12.
2.3 the generation of frequency hopping frequency set and distribution
When digital clustering communication system works in many base station modes, produce the frequency hopping frequency set, comprise frequency hopping synchronizing frequency collection and frequency hopping communications frequency set under the cluster mode, notify each base station with frequency hopping frequency set information then by Regional Control Center; When digital clustering communication system works in single base station mode, produce required frequency hopping synchronizing frequency collection and frequency hopping communications frequency set by the base station.When travelling carriage is in straight-through mode of operation, produce frequency hopping synchronizing frequency collection and frequency hopping communications frequency set by travelling carriage self.
Because frequency hopping is the most important thing for whole frequency-hopping communication system synchronously, therefore, the generation of frequency hopping synchronizing frequency collection and distribute most important.The present invention proposes a kind of production method of frequency hopping synchronizing frequency collection.
At first, each communication equipment (zone controller, base station and travelling carriage) is all kept the concordance list of the frequency hopping frequency of a whole system.Used frequency index is according to a certain rule or algorithm (as: frequency interval between the true frequency of the frequency correspondence of adjacent index should be big as far as possible) calculating and next in the system, and this table is divided into two parts: a part is the frequency hopping frequency sets that is used for cluster mode; Another part is the frequency hopping frequency sets that is used for direct mode operation.Just can from this concordance list, take out some frequencies by method proposed by the invention and constitute frequency hopping synchronizing frequency collection under the cluster mode and the frequency hopping synchronizing frequency collection under the direct mode operation.
In second step, need to determine to calculate the employed temporal information of frequency hopping synchronizing frequency collection, that is: TOD (Time of Day) information.In frequency hopping communications, often need utilize temporal information (TOD) to produce frequency hopping frequency set or frequency hop sequences.In this method, we utilize local time information to produce frequency hopping synchronizing frequency collection, and wherein: the binary system of temporal information (year, month, day, hour, min, second) can be represented (see figure 3) with following mode:
In Fig. 3, the purpose of representing with 6 bits in year is to produce the temporal information of 32 bits, and being convenient to the byte is that unit handles.
In the 3rd step, frequency is chosen process.If system can with frequency add up to 256, frequency hopping synchronizing frequency and concentrate and comprise 5 frequencies altogether, then get certain 8 bit in top 32 bits as the basic point of choosing frequency hopping synchronizing frequency collection.It is as follows specifically to choose process:
1) with 8 bits chosen as index value (i), from the frequency concordance list, take out first frequency;
2) with 8 bit values (i) elected above as the center index value, choose 2 frequencies successively forward, backward again, that is: the index value of all the other 4 frequencies is respectively i-1, i+1, i-2 and i+2.Wherein: the index value of all the other 4 frequencies is the positive integers to 256 deliverys.
If the frequency points that the frequency hopping synchronizing frequency is concentrated is not an odd number, and is then just unequal to the forward and backward frequency quantity that obtains, can select forward or backward frequencies of getting at random more.
If need to produce the frequency hopping synchronizing frequency collection of many group quadratures, then the frequency set that can produce with said method is as basic frequency hopping synchronizing frequency collection, can obtain doing some computings when " the asynchronous quadrature networking " that propose below (as: used compute mode) between this frequency set and the frequency hopping frequency concordance list then.
For different mode of operations and networking mode, the concrete production method of frequency hopping synchronizing frequency collection is as follows:
1., the asynchronous quadrature networking under the cluster mode
If cluster mode can with frequency add up to that 256, frequency duplex factor as one are 1/3, the frequency points of frequency hopping synchronizing frequency collection is 5, then produce a basic frequency hopping synchronizing frequency collection according to the year information (6 bit) of TOD and high 2 of month information, then they are offset 5,10 respectively and can obtain two other frequency hopping synchronizing frequency collection of quadrature with it, thereby obtain the frequency hopping synchronizing frequency collection of three quadratures.When many base station networkings, zone controller will be the frequency hopping synchronizing frequency collection distribution of information that produces to each base station, thereby is completely orthogonal between the frequency hopping synchronizing frequency collection between each base station.When the work of single base station, the base station produces a basic frequency hopping synchronizing frequency collection according to same method, just can carry out work with the frequency in this frequency set on frequency hopping synchronizing channel and frequency hopping service channel then.
For travelling carriage, under cluster mode, it does not know the networking mode of this moment, therefore, and the frequency hopping synchronizing frequency collection when it at first goes out asynchronous quadrature networking according to above-mentioned algorithm computation.Simultaneously, the computational methods during according to synchronized orthogonal networking described below calculate another group frequency hopping synchronizing frequency collection, and the union of getting these two frequency sets then is as the frequency hopping synchronizing frequency collection under the cluster mode of travelling carriage.
2., the synchronized orthogonal networking under the cluster mode
Because during the synchronized orthogonal networking, the whole network uses unified frequency hopping frequency set, therefore, the generation of frequency hopping synchronizing frequency collection is identical with the production method of single base station, the frequency hopping synchronizing frequency collection that each base station assigns obtains is identical, but the FH Sequence Design method that adopts synchronized orthogonal can guarantee that between the frequency hopping synchronizing channel of each base station and the employed frequency hopping pattern of frequency hopping service channel be quadrature, does not repeat them here.
For travelling carriage, the computational methods of the computational methods of its frequency hopping synchronizing frequency collection during with the asynchronous quadrature networking under the cluster mode are the same.
3., direct mode operation
Under direct mode operation, each travelling carriage produces frequency hopping synchronizing frequency collection according to the clock information and the said method of this locality.Different with cluster mode is, in computational process, travelling carriage uses is frequency hopping frequency set under the direct mode operation.
2.4 the frequency hopping mode of control channel and Traffic Channel and aerial framing
The digital clustering communication system that the present invention is suitable for adopts time division multiple access (TDMA) system.In this system, the N of a carrier wave TsIndividual time slot (N Ts4) formation one frame air frame, N SfThe frame air frame constitutes a frame superframe, and wherein: a certain frame or a few frame can be used for transmitting channel associated signalling in superframe.The air frame structural representation as shown in Figure 4.
In each time slot, fill different information according to the difference of current logic channel.For example: current time slots is the frequency hopping synchronizing channel, then fills hopping synchronization information; Current time slots is the voice service channel, then fills speech information.
2.4.1 carrier wave and time slot
As shown in figure 10, in the present invention, carrier wave and time slot constitute the available wireless channels space of two dimension jointly." carrier wave " herein is meant some concrete emissions or receiving equipment, and this equipment can only carry out work with some frequencies in some moment, as: some channel devices of base station; " time slot " is meant time dividing unit that should " carrier wave ".For example: be the carrier wave and the time slot schematic diagram of a base station among Figure 10, it represents that this base station has four carrier waves, each carrier wave has four time slots.
Said among the present invention " control carrier wave " is meant the carrier wave that has comprised frequency hopping synchronizing channel and Common Control Channel in this carrier wave; " common carrier wave " then is meant the carrier wave except " control carrier wave ".
2.4.2 physical channel
Physical channel just is meant the N that an above-mentioned carrier wave can transmit TsIndividual time slot, that is: the physical channel quantity on each carrier wave is N TsIndividual, be numbered 0 ... N Ts-1.Therefore, for certain communication equipment, the physical channel quantity that has altogether is that carrier number multiply by timeslot number.Such as: base station one total 4*4=16 the physical channel shown in Figure 10.
2.4.3 logic channel
Logic channel is different division of content of transmitting according to physical channel, and it can be divided into control channel and Traffic Channel, and wherein: control channel is divided into frequency hopping synchronizing channel, frequency hopping service channel, Common Control Channel and associated control channel.For a base station, the frequency hopping synchronizing channel takies the 0th time slot of control carrier wave; Common Control Channel takies the 1st time slot of control carrier wave; Associated control channel and frequency hopping service channel take the N in each carrier wave superframe structure Sf-1 frame; Traffic Channel takies other time slot.
Concrete, can be referring to Fig. 5 and Fig. 6.They have expressed an example of the mapping relations of physical channel under cluster mode and the direct mode operation (4 time slots of a carrier wave) and logic channel respectively.
The effect of frequency hopping synchronizing channel and frequency hopping service channel is:
* cluster mode:
Make travelling carriage can in time obtain the hopping synchronization information of the base station in the sub-district of living in, as: the information such as frequency hop sequences of TOD, control channel;
* direct mode operation:
Make travelling carriage can obtain hopping synchronization information such as frequency hopping synchronous phase and needed TOD of proper communication stage, cipher key index.
2.4.4 frequency hopping mode
The present invention adopts the frequency hopping of time slot frequency hopping, and employed frequency hopping frequency set of each physical channel and frequency hop sequences all can be inequality, that is: employed frequency hopping frequency set of each time slot and frequency hopping pattern all can be inequality.
Different frequency hopping frequency sets just can constitute different logic channels with different frequency hopping patterns, is used for sending different information, such as: some time slot adopts frequency hopping synchronizing frequency collection and frequency hopping synchronization pattern, and then these time slots have just constituted the frequency hopping synchronizing channel; Some time slot adopts frequency hopping communications frequency set and Traffic Channel frequency hopping pattern, and then they have just constituted Traffic Channel.
2.5 the frequency hopping mode under the cluster mode
For certain travelling carriage, whole communication process is divided into two stages: frequency hopping synchronous phase and proper communication stage.Under the situation of control channel frequency hopping, need from frequency hopping synchronizing channel or frequency hopping service channel, obtain hopping synchronization information.Travelling carriage obtain frequency hopping synchronously after, can enter normal course of communications.
2.5.1 frequency hopping is synchronous
The hopping scheme of frequency hopping synchronizing channel and frequency hopping service channel is: the frequency hopping frequency set adopts frequency hopping synchronizing frequency collection (comprising some to the uplink and downlink frequency), frequency hopping pattern to adopt the frequency hopping pattern of " sequential loop jumping ".
After the mobile platform started, if work in cluster mode, the cluster mode frequency hopping synchronizing frequency collection down that at first the calculates frequency hopping that circulates then, the control channel information of search reception base station according to this locality.After obtaining 3 or 5 frame frequency hopping synchronization frames,, obtain the hopping synchronization information of current base station according to the majority decision principle.After the acquisition, then follow the tracks of current base station always and carry out frequency hopping.Simultaneously, the base station will be in Common Control Channel frequency parameter, the synchronizing information of broadcast transmission adjacent base station, like this, travelling carriage has also just obtained frequency parameter, the synchronizing information of adjacent base station simultaneously.Thereby travelling carriage can be realized the monitoring to the channel quality of the frequency hopping synchronizing channel of adjacent base station.
2.5.2 handover
Travelling carriage is with when communicate by letter in base station 1, the frequency parameter and the hopping synchronization information such as TOD of reception 1 relevant adjacent base station that sends from the base station, after obtaining this information, judge the signal strength signal intensity of the frequency hopping synchronizing channel of adjacent base station by the mode of synchronous scanning (synchronous network) or slow scanning (asynchronous networking), this scanning can be carried out simultaneously with communicating by letter of Traffic Channel, carries out in the time of also can utilizing Traffic Channel idle;
Travelling carriage judges whether that according to a certain handover thresholding that sets in advance needs carry out handover then by judging the signal strength signal intensity from each adjacent base station, if need, then carries out following operation:
1) after handover is carried out in the travelling carriage decision, sends soft handover claim frame (identifier, the handoff request and the base station identifier that will switch, that is: the identifier of base station 2 that comprise base station 1), after receive base station 1, this request is sent to base station 2 to base station 1;
3) after base station 2 receives this request, judge whether that enough channel resources can be for utilizing;
4) if there are enough channel resources base station 2, then accept this handoff request, and distribute respective resources to give mobile radio station, simultaneously with this information informing base station 1;
5) base station 1 sends handover information (comprising the traffic channel information of distributing to travelling carriage) to travelling carriage;
6) after certain scheduled time of interval, travelling carriage is proceeded to communicate by letter by the Traffic Channel of base station 2 with base station 2.
It should be noted that in handover well behaved decision rule to be arranged to the setting of handoff threshold.
If need carry out direct-cut operation,, therefore, realize proper communication thereby can directly on the Common Control Channel of adjacent base station, initiate to insert request equally then because travelling carriage has obtained frequency parameter, the synchronizing information of adjacent base station by current base station.
2.5.3 the frequency hopping mode during proper communication
When the control channel frequency hopping, obtain the hopping synchronization information of base station at travelling carriage after, to on Common Control Channel, take place alternately of signalings such as the request of access, channel allocation, and then just can allow both sides on a certain Traffic Channel, carry out proper communication in the frequency hopping mode by both sides' Signalling exchange.
2.6 the frequency hopping mode under the direct mode operation
Under direct mode operation, principal and subordinate's working method is adopted in the communication between the travelling carriage.A side who at first makes a call is a main website, and the recipient is a slave station.Therefore, the synchronous needed TOD information of frequency hopping is sent by main website.
Whole communication process is divided into two stages: the synchronous and proper communication of frequency hopping.Below will describe respectively.
2.6.1 frequency hopping is synchronous
2.6.1.1 need not called call answering
In this stage, the frequency that main website concentrates with the frequency hopping synchronizing frequency according to the mode that circulation is jumped sends a certain predefined frame number continuously.
Slave station only otherwise in normal communication state, then it just concentrates optional frequency to be in the monitoring channel state from the frequency hopping synchronizing frequency, if receive certain frequency hopping synchronization frame, judges then whether this information is correct, as if correctly then separating jumping; If the frequency hopping synchronization frame that receives is incorrect, but incoming level (RSSI) surpasses a certain thresholding, noise really admits a fault, then the order according to the synchronizing frequency collection skips to next frequency reception next frame frequency hopping synchronization frame, follow main website simultaneously and carry out frequency hopping, if the selected a certain frequency of slave station does not receive effective frequency hopping synchronization frame in a certain scheduled time, then the other frequency of selective sequential receives again.
2.6.1.2 need called call answering
If the called call answering that carries out of information requirements in the frequency hopping synchronization frame of main website, then from stand in correctly receive hopping synchronization information after, send response message immediately to main website, after main website is received, send and reply confirmation.After both sides shake hands and finish, enter the proper communication stage.
2.6.1.3 master/slave station flow process
From time flow, the schematic flow sheet between the master/slave station as shown in Figure 9.As can be seen from the figure, if main website do not need the slave station call answering, then main website enters the proper communication stage after sending the frequency hopping synchronization frame of a certain predetermined frame number immediately; If main website needs the slave station call answering, then master and slave both sides just enter the proper communication stage after need replying and shaking hands.
2.6.2 the frequency hopping mode during proper communication
When the control channel frequency hopping, after travelling carriage obtained hopping synchronization information from another travelling carriage, both sides promptly can bring into use the random frequency hopping mode to carry out Signalling exchange and proper communication.
Adopt the present invention, digital clustering communication system can not only improve frequency efficiency, and the more important thing is, no matter at cluster mode still under direct mode operation, control channel and Traffic Channel have all realized frequency hopping, thereby can improve the antijamming capability of entire wireless communication system, therefore be particularly suitable for interference ratio than in serious environmental or the military communication environment.
3. concrete enforcement
The technology contents that the present invention relates to both can partly be implemented in the digital clustering communication system of reality, also can all implement.For example, only to the enforcement frequency hopping of the control channel under the cluster mode and to not implementing frequency-hopping method proposed by the invention under the direct mode operation.
In China, digital clustering communication system works in the 800MHz frequency range, and the uplink and downlink frequency interval is 45MHz.According to the regulation of State Radio Regulatory Commission, be spaced apart 25kHz between the adjacent frequency, therefore, available frequency can be divided into B/25kHz=N to (a pair of two frequencies, that is: the uplink and downlink frequency of comprising), wherein: B is the upstream or downstream total bandwidth.
Below, we are that example illustrates the specific embodiment of the present invention with the following parameters.
Equipment constitutes: zone controller, 4 base stations, a plurality of travelling carriage;
Wireless communication system has 200 pairs of frequencies, with frequency to according to from low to high mode number consecutively f 1, f 2.。。、f 200。
Zone controller (claiming Regional Control Center again), base station and travelling carriage are realized each functional module as shown in Figure 2 respectively, and according to the proposed method as can be known, the course of work of system is as follows:
1) under how base station asynchronous quadrature networking model, after the system start-up, Regional Control Center is after initialization finishes, by some frequency hopping mode of operations and parameter (as: the frequency hopping frequency quantity of direct mode operation and frequency hopping synchronizing band number of spots manually are set, the frequency hopping number of frequencies of cluster mode and frequency hopping synchronizing band number of spots etc.), calculate frequency hopping synchronizing frequency collection and frequency hopping communications frequency set according to method of the present invention then, after this to the relevant frequency hopping networking mode of base station transmits, frequency parameters such as frequency configuration mode, for example: Regional Control Center is chosen the frequency hopping synchronizing frequency collection of 5 frequencies as direct mode operation from 200 frequencies, and 15 frequencies are as the frequency hopping communications frequency set under the direct mode operation; 180 remaining frequencies are respectively allocated to 4 base stations, and each base station has 45 frequencies, and wherein: 5 frequencies are as frequency hopping synchronizing frequency collection; 40 frequencies are as the frequency hopping communications frequency set;
2) base station is obtaining frequency parameter or through after relevant parameter (single base station networking) artificially is set, is just working in frequency-hopping mode according to these parameters from Regional Control Center;
3) operating mobile station is when cluster mode, and the frequency that the frequency hopping synchronizing frequency under the cluster mode that the scan round this locality, back of starting shooting calculates is concentrated obtains hopping synchronization information, is obtaining the just frequency hopping synchronizing channel of moment tracking base stations of back;
4) operating mobile station if need to send, then sends hopping synchronization information at first continuously, and then enters normal communication state when direct mode operation; If receive, then 5 concentrated frequencies of the frequency hopping synchronizing frequency under the scan round direct mode operation obtain hopping synchronization information, after obtaining hopping synchronization information, can carry out proper communication with transmit leg.
4. operation principle
In digital clustering communication system, mainly contain two kinds of mode of operations: cluster mode and direct mode operation, the former is meant the mode of operation when having information infrastructure (as: zone controller, base station etc.), and it can be divided into single base station mode and many base station modes (at this moment, having zone controller) again; The latter is meant and does not have information infrastructure, the mode of operation when having only travelling carriage.Operating mobile station in cluster mode still be direct mode operation be that man-machine interface by travelling carriage is by manually being provided with.Under different mode of operations, solve the method difference of control channel frequency hopping.
Under the cluster mode of operation, when single base station networking is worked, the base station produces frequency hopping synchronizing frequency collection and frequency hopping communications frequency set according to certain algorithm, recycles the concentrated frequency of frequency hopping synchronizing frequency then and send hopping synchronization information on frequency hopping synchronizing channel and frequency hopping service channel; When many base station networkings are worked, zone controller produces frequency hopping synchronizing frequency collection and frequency hopping communications frequency set according to certain algorithm, then they together are dispensed to each base station in company with the frequency hopping running parameter, after this, the frequency hopping running parameter set according to zone controller of each base station recycles the frequency of distributing the frequency hopping synchronizing frequency that obtains to concentrate and send hopping synchronization information on frequency hopping synchronizing channel and frequency hopping service channel.And for each travelling carriage, it keeps the concordance list of all frequencies of whole system, when it works in cluster mode, after the start, it can go out frequency hopping synchronizing frequency collection according to certain algorithm computation, recycles the frequency scanning wireless channel in this frequency set then, up to receiving the hopping synchronization information of going to the station to meet somebody and sending, after this just can to obtain frequency hopping synchronous with the base station, and then communicate with it.
Under straight-through mode of operation, travelling carriage goes out local frequency hopping synchronizing frequency collection and frequency hopping communications frequency set according to certain algorithm computation.When accepting state, travelling carriage recycles the frequency scanning wireless channel that the frequency hopping synchronizing frequency is concentrated, if find to have travelling carriage to its transmission information, then from the frequency hopping synchronizing channel of transmit leg or frequency hopping service channel, obtain hopping synchronization information, communicate with it then; When transmit status, travelling carriage at first recycles the concentrated frequency of frequency hopping synchronizing frequency and send hopping synchronization information on the frequency hopping synchronizing channel, enter normal communication state then, simultaneously, still intermittent cyclic uses the frequency of frequency hopping synchronizing frequency collection to send hopping synchronization information on the frequency hopping service channel when normal communication state, to realize the slow networking function of frequency hopping.

Claims (10)

1.一种具有控制信道跳频功能的数字集群通信方法，包括集群模式和直通模式，其特征是1. A digital trunking communication method with control channel frequency hopping function, comprising trunking mode and direct mode, characterized in that A.集群模式包括单基站组网和多基站组网，其中单基站组网工作时，基站根据一定的算法产生跳频同步频率集和跳频通信频率集，然后循环使用跳频同步频率集中的频率在跳频同步信道和跳频勤务信道上发送跳频同步信息；多基站组网工作时，区域控制器根据一定的算法产生跳频同步频率集和跳频通信频率集，然后将它们随同跳频工作参数一同分配至各个基站，各个基站根据区域控制器设定的跳频工作参数循环使用分配获得的跳频同步频率集中的频率在跳频同步信道和跳频勤务信道上发送跳频同步信息，对于移动台，包括单基站组网或多基站组网，每个移动台均维持整个系统的所有频点的索引表，开机后，当工作于集群模式时，根据一定的算法计算出跳频同步频率集，然后循环使用该频率集中的频率扫描无线信道，直到接收到基站发送的跳频同步信息，此后就可以从基站获得跳频同步，进而与之进行通信；A. The cluster mode includes single base station networking and multi-base station networking. When the single base station networking is working, the base station generates a frequency hopping synchronization frequency set and a frequency hopping communication frequency set according to a certain algorithm, and then recycles the frequency hopping synchronization frequency set. The frequency sends frequency hopping synchronization information on the frequency hopping synchronization channel and the frequency hopping service channel; when the multi-base station network is working, the regional controller generates the frequency hopping synchronization frequency set and the frequency hopping communication frequency set according to a certain algorithm, and then hops them together The frequency working parameters are distributed to each base station together, and each base station recycles the frequencies in the frequency hopping synchronization frequency set obtained by allocation according to the frequency hopping working parameters set by the regional controller to send frequency hopping synchronization information on the frequency hopping synchronization channel and the frequency hopping service channel , for mobile stations, including single base station networking or multi-base station networking, each mobile station maintains an index table of all frequency points of the entire system. After starting up, when working in cluster mode, the frequency hopping is calculated according to a certain algorithm Synchronize the frequency set, and then cycle through the frequencies in the frequency set to scan the wireless channel until the frequency hopping synchronization information sent by the base station is received, after which the frequency hopping synchronization can be obtained from the base station, and then communicate with it; B.直通工作模式时，移动台根据一定的算法计算出本地的跳频同步频率集和跳频通信频率集，在接收状态时，移动台循环使用跳频同步频率集中的频率扫描无线信道，若发现有移动台在向其发送信息，则从发送方的跳频同步信道或跳频勤务信道中获取跳频同步信息，然后与之进行通信；在发送状态时，移动台首先循环使用跳频同步频率集中的频率在跳频同步信道上发送跳频同步信息，然后进入正常通信状态，同时，在正常通信状态时仍然间歇循环使用跳频同步频率集发送跳频同步信息作为勤务信息在跳频勤务信道上发送，以实现跳频的迟入网。B. In the direct working mode, the mobile station calculates the local frequency hopping synchronization frequency set and the frequency hopping communication frequency set according to a certain algorithm. In the receiving state, the mobile station cyclically uses the frequencies in the frequency hopping synchronization frequency set to scan the wireless channel. If a mobile station is found to be sending information to it, it will obtain the frequency hopping synchronization information from the frequency hopping synchronization channel or frequency hopping service channel of the sender, and then communicate with it; in the sending state, the mobile station first uses the frequency hopping synchronization The frequency in the frequency set sends frequency hopping synchronization information on the frequency hopping synchronization channel, and then enters the normal communication state. Send it on the channel to realize the late network entry of frequency hopping. 2.如权利要求1所述的具有控制信道跳频功能的数字集群通信方法，其特征是所述跳频包括控制信道跳频和业务信道的跳频，采用时分多址(TDMA)体制，其中，一个载波的Nts个时隙(Nts□4)构成一帧空中帧，Nsf帧空中帧构成一帧超帧，在超帧中某一帧或几帧可以用来传输随路信令，在每个时隙内，根据当前逻辑信道的不同填充不同信息，而在一个载波的一帧超帧时间内，发送信息可以组成一帧完整的跳频同步帧。2. the digital trunking communication method with control channel frequency hopping function as claimed in claim 1, is characterized in that described frequency hopping comprises the frequency hopping of control channel frequency hopping and traffic channel, adopts time division multiple access (TDMA) system, wherein , N ts time slots (N ts □4) of a carrier form an air frame, and N sf air frames form a superframe, in which a certain frame or several frames can be used to transmit channel-associated signaling , in each time slot, different information is filled according to the difference of the current logical channel, and within one superframe time of one carrier, the transmitted information can form a complete frame of frequency hopping synchronization frame. 3.如权利要求1所述的具有控制信道跳频功能的数字集群通信方法，其特征是所述跳频采用时隙跳频，每个时隙所采用的跳频频率集和跳频图案可以不同，不同的跳频频率集和不同的跳频图案构成不同的逻辑信道，用来发送不同的信息，例如：某些时隙采用跳频同步频率集和跳频同步图案，这些时隙就构成了跳频同步信道；某些时隙采用跳频通信频率集和业务信道跳频图案，就构成了业务信道。3. the digital trunking communication method with control channel frequency hopping function as claimed in claim 1, it is characterized in that described frequency hopping adopts time slot frequency hopping, and the frequency hopping frequency set and frequency hopping pattern that each time slot adopts can be Different, different frequency hopping frequency sets and different frequency hopping patterns constitute different logical channels for sending different information, for example: some time slots use frequency hopping synchronization frequency sets and frequency hopping synchronization patterns, these time slots constitute The frequency hopping synchronization channel is formed; some time slots use the frequency hopping communication frequency set and the frequency hopping pattern of the traffic channel to form the traffic channel. 4.如权利要求1或2所述的具有控制信道跳频功能的数字集群通信方法，其特征是所述集群模式下的跳频方式包含跳频同步和正常通信，其中跳频同步是通过从跳频同步信道或跳频勤务信道中获取跳频同步信息来实现的，移动台在获取跳频同步之后，可进入正常通信过程。4. the digital trunking communication method with control channel frequency hopping function as claimed in claim 1 or 2, it is characterized in that the frequency hopping mode under the trunking mode comprises frequency hopping synchronization and normal communication, wherein frequency hopping synchronization is through from It is realized by obtaining the frequency hopping synchronization information in the frequency hopping synchronization channel or the frequency hopping service channel. After obtaining the frequency hopping synchronization, the mobile station can enter the normal communication process. 5.如权利要求1或4所述的具有控制信道跳频功能的数字集群通信方法，其特征是所述跳频同步包括5. the digital trunking communication method with control channel frequency hopping function as claimed in claim 1 or 4, it is characterized in that described frequency hopping synchronization comprises a.跳频同步信道和跳频勤务信道的跳频方案为：跳频频率集采用跳频同步频率集，包含若干对上、下行频点，跳频图案采用“顺序循环跳”的跳频图案；a. The frequency hopping scheme of the frequency hopping synchronous channel and the frequency hopping service channel is: the frequency hopping frequency set adopts the frequency hopping synchronous frequency set, including several pairs of uplink and downlink frequency points, and the frequency hopping pattern adopts the frequency hopping pattern of "sequential cyclic hopping" ; b.移动台开机后，若工作于集群模式，则根据本地计算出的集群模式下的跳频同步频率集进行循环跳频，搜索接收基站的跳频同步信息，根据大数判决原理，获得当前基站的跳频同步信息并跟踪当前基站进行跳频；b. After the mobile station is turned on, if it works in the trunking mode, it performs cyclic frequency hopping according to the frequency hopping synchronization frequency set in the trunking mode calculated locally, searches for the frequency hopping synchronization information of the receiving base station, and obtains the current Frequency hopping synchronization information of the base station and track the frequency hopping of the current base station; c.基站将在公共控制信道中广播发送相邻基站的跳频参数、同步信息，这样，移动台也就同时获得了相邻基站的跳频参数、同步信息。c. The base station will broadcast and send the frequency hopping parameters and synchronization information of the adjacent base stations in the public control channel, so that the mobile station also obtains the frequency hopping parameters and synchronization information of the adjacent base stations at the same time. 6.如权利要求1或4所述的具有控制信道跳频功能的数字集群通信方法，其特征是还包括越区切换，其中6. the digital trunking communication method with control channel frequency hopping function as claimed in claim 1 or 4, is characterized in that also comprising handover, wherein a.移动台在与基站1通信的同时，接收从基站1发送的有关相邻基站的TOD等跳频参数和跳频同步信息，获取该信息后，通过同步扫描(同步组网)或慢扫描(异步组网)的方式判断相邻基站的跳频同步信道的信号强度，这种扫描可以与业务信道的通信同时进行，也可以利用业务信道空闲时进行；a. While communicating with base station 1, the mobile station receives frequency hopping parameters such as TOD of adjacent base stations and frequency hopping synchronization information sent from base station 1. After obtaining the information, it performs synchronous scanning (synchronous networking) or slow scanning (Asynchronous networking) method to judge the signal strength of the frequency hopping synchronous channel of the adjacent base station. This scanning can be carried out simultaneously with the communication of the traffic channel, or can be carried out when the traffic channel is idle; b.移动台通过判断来自各相邻基站的信号强度，然后根据某一预先设置的越区切换门限来判断是否需要进行越区切换，若需要，则执行如下操作：b. The mobile station judges whether it is necessary to perform handover by judging the signal strength from each adjacent base station, and then according to a preset handover threshold. If necessary, perform the following operations: 1)移动台决定进行越区切换后，向基站1发送软切换请求帧(包含基站1的标识符、切换请求和将要切换的基站标识符，即：基站2的标识符)，基站1收到后，将该请求发送至基站2；1) After the mobile station decides to perform handover, it sends a soft handover request frame (including the identifier of base station 1, the handover request and the identifier of the base station to be handed over to base station 1, that is, the identifier of base station 2) to base station 1, and base station 1 receives After that, send the request to base station 2; 2)基站2接收到该请求后，判断是否有足够的信道资源可供利用；2) After receiving the request, the base station 2 judges whether there are enough channel resources available; 3)若基站2有足够的信道资源，则接受该切换请求，并分配相应资源给移动站，同时将该信息通知基站1；3) If the base station 2 has sufficient channel resources, then accept the handover request, and allocate corresponding resources to the mobile station, and notify the base station 1 of the information at the same time; 4)基站1向移动台发送越区切换信息，该信息包含分配给移动台的业务信道信息；4) Base station 1 sends handover information to the mobile station, which information includes traffic channel information allocated to the mobile station; 5)在间隔某预定时间后，移动台和基站2通过基站2的业务信道继续进行通信。5) After a certain predetermined time interval, the mobile station and the base station 2 continue to communicate through the traffic channel of the base station 2 . C.若需要进行硬切换，则由于移动台已经通过当前基站获得相邻基站的TOD等跳频参数和跳频同步信息，因此，同样可以直接在相邻基站的公共控制信道上发起接入请求从而实现正常通信。C. If hard handover is required, since the mobile station has obtained the frequency hopping parameters such as TOD and frequency hopping synchronization information of the adjacent base station through the current base station, it can also directly initiate an access request on the common control channel of the adjacent base station In order to achieve normal communication. 7.如权利要求1或2所述的具有控制信道跳频功能的数字集群通信方法，其特征是所述直通模式下的跳频方式是指移动台之间的通信采用主从工作方式，首先发起呼叫的一方为主站，接收方为从站，跳频同步所需要的TOD信息由主站发送，整个通信过程分为跳频同步阶段和正常通信阶段，其中跳频同步包括7. the digital trunking communication method with control channel frequency hopping function as claimed in claim 1 or 2, it is characterized in that the frequency hopping mode under the described straight-through mode refers to that the communication between the mobile stations adopts the master-slave mode of operation, at first The party that initiates the call is the master station, and the receiver is the slave station. The TOD information required for frequency hopping synchronization is sent by the master station. The entire communication process is divided into a frequency hopping synchronization stage and a normal communication stage. The frequency hopping synchronization includes a.主站按照循环跳的方式以跳频同步频率集中的频点连续发送某一预先设定的帧数；a. The master station continuously sends a preset number of frames at the frequency points in the frequency hopping synchronization frequency set in the way of cyclic hopping; b.从站只要不在正常通信状态，则它就从跳频同步频率集中任选一个频点处于监视信道状态，若接收到某个跳频同步帧，则判断该信息是否正确，若正确则解跳；若接收的跳频同步帧不正确，但接收电平(RSSI)超过某一门限，确认不是噪声，则根据同步频率集的顺序跳至下一频点接收下一帧跳频同步帧，同时跟随主站进行跳频，若从站选定的某一频点在某一预定时间内未接收到有效跳频同步帧，则再顺序选择另外一频点进行接收。b. As long as the slave station is not in the normal communication state, it will choose a frequency point from the frequency hopping synchronization frequency set to monitor the channel state. If it receives a frequency hopping synchronization frame, it will judge whether the information is correct. If it is correct, it will solve the problem. jump; if the received frequency hopping synchronization frame is incorrect, but the receiving level (RSSI) exceeds a certain threshold, and it is confirmed that it is not noise, then jump to the next frequency point according to the order of the synchronization frequency set to receive the next frequency hopping synchronization frame, At the same time, it follows the master station to perform frequency hopping. If a certain frequency point selected by the slave station does not receive an effective frequency hopping synchronization frame within a certain predetermined time, it will then select another frequency point in order to receive it. 8.如权利要求1所述的具有控制信道跳频功能的数字集群通信方法，其特征是所述集群模式的异步正交组网包括采取分频段组网、频率复用的方式，相邻小区通过使用不同的跳频频点集合进行区分，也就是通过频点正交的方式来加以区分；而同一小区内的不同用户由于同步于共同的基站，因此可以通过同步正交的跳频序列来区分。8. The digital trunking communication method with control channel frequency hopping function as claimed in claim 1, characterized in that the asynchronous orthogonal networking of the trunking mode includes taking the mode of sub-frequency band networking and frequency multiplexing, and adjacent cells Distinguish by using different sets of frequency hopping frequency points, that is, distinguish by means of frequency point orthogonality; and different users in the same cell can be distinguished by synchronous orthogonal frequency hopping sequences because they are synchronized to a common base station . 9.如权利要求1所述的具有控制信道跳频功能的数字集群通信方法，其特征是所述集群模式的同步正交组网包括采取全网使用同一个跳频频率集的方式，频率复用比为1，每个小区的跳频频点个数为N，其中9. The digital trunking communication method with control channel frequency hopping function as claimed in claim 1, characterized in that the synchronous orthogonal networking of the trunking mode includes adopting the mode that the whole network uses the same frequency hopping frequency set, and the frequency complex The utilization ratio is 1, and the number of frequency hopping points in each cell is N, where 在固定架设情况下，全网同步采用的方式可以有两种：有线方式下的全网同步，如：通过SDH机制；通过GPS或我国的北斗卫星授时同步；In the case of fixed erection, there are two ways to synchronize the whole network: the whole network synchronization under the wired mode, such as: through the SDH mechanism; through GPS or my country's Beidou satellite timing synchronization; 在基站“运动”或基站机动架设情况下，全网同步采用的方式是GPS或北斗卫星的授时同步；In the case of base station "movement" or base station mobile erection, the synchronization method of the whole network is the timing synchronization of GPS or Beidou satellite; 对于跳频同步，为保证同步正交网中的各个基站(小区)的跳频控制信道是正交的，跳频同步频率集中至少应该包含3个频点；For frequency hopping synchronization, in order to ensure that the frequency hopping control channels of each base station (cell) in the synchronous orthogonal network are orthogonal, the frequency hopping synchronization frequency set should include at least 3 frequency points; 同时，为了快速同步，提高跳频同步速度，跳频同步频率集中的频点个数应该尽量少，建议为3、5、7或12个。At the same time, in order to quickly synchronize and increase the frequency hopping synchronization speed, the number of frequency points in the frequency hopping synchronization frequency concentration should be as small as possible, and it is recommended to be 3, 5, 7 or 12. 10.如权利要求1所述的具有控制信道跳频功能的数字集群通信方法，其特征是所述集群模式下的跳频同步频率集和跳频通信频率集的产生和分配包括当数字集群通信系统工作于多基站模式时，由区域控制器产生跳频频率集，然后将跳频频率集信息通知各基站；当数字集群通信系统工作于单基站模式时，由基站本地产生所需的跳频同步频率集和跳频通信频率集；当移动台处于脱网直通工作模式时，由移动站自身产生跳频同步频率集和跳频通信频率集。10. The digital trunking communication method with control channel frequency hopping function as claimed in claim 1, characterized in that the generation and distribution of the frequency hopping synchronous frequency set and the frequency hopping communication frequency set under the trunking mode include when the digital trunking communication When the system works in multi-base station mode, the regional controller generates a frequency hopping frequency set, and then notifies each base station of the frequency hopping frequency set information; when the digital trunking communication system works in single base station mode, the base station generates the required frequency hopping locally Synchronous frequency set and frequency hopping communication frequency set; when the mobile station is in the off-network direct working mode, the mobile station itself generates a frequency hopping synchronous frequency set and a frequency hopping communication frequency set.
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