CN101478794B - Method for implementing cross base station automatic network passing by MPT-1327 cluster communication system - Google Patents
Method for implementing cross base station automatic network passing by MPT-1327 cluster communication system Download PDFInfo
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- CN101478794B CN101478794B CN2008100559392A CN200810055939A CN101478794B CN 101478794 B CN101478794 B CN 101478794B CN 2008100559392 A CN2008100559392 A CN 2008100559392A CN 200810055939 A CN200810055939 A CN 200810055939A CN 101478794 B CN101478794 B CN 101478794B
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Abstract
The invention discloses a method of MPT-1327 trunking communication system realizing automatic net over across the base station, and the method is as follows: 1) first roaming base station channel parameters, established selection rules and offline conditions are written in advance in a radio station through a code-writing software; 2) in standby state, the radio station carries out periodic detection on the signal quality and signal intensity of other base stations and real-timely stores the detection results in a special list of the base station channel within the radio station; when the base station detection is completed, the radio station determines the base station with optimal signals in current state according to the own selection rules and stores the control channel number of the base station; 3) if the number of the present base station meets the offline condition, the radio station is switched to a new base station according to the established offline action to continue standby if in standby state, and the radio station is switched to the base station with optimal signals if in conversation state, is registered on the net and initiates new calls to maintain original conversation, that is automatic net over across the base station; if the offline condition is not met, the radio station in standby state continues the step 2).
Description
Technical field
The invention belongs to mechanics of communication, relate in particular to the automatic method of crossing net of a kind of MPT-1327 trunked communication system portable terminal under holding state and talking state, be mainly used in the public security communications field.
Background technology
Trunked communication system, it is a kind of specific schedule mobile communication system of shared wireless channel, it has adopted multichannel common and the dynamic assignment Channel Technology in the modern communications, have exhale, scheduling features such as group calling, broadcast ﹠ call, be characterized in that call setup is fast, the user has different priorities, restriction call time, and possess the distant resurrection function of getting killed, be fit to very much public security system and use.
MPT-1327 is an international disclosed special-purpose land trunking mobile communication signaling standard, adopt the Dedicated Control Channel transmission means of 1200bits/s, defined the space signaling rule between group system controller (TSC) and the portable terminal (RU), Chinese public security is alert all carries out the MPT-1327 standard with trunking signal standard (GA176-1998) regulation aerial signaling.
The MPT-1327 trunked communication system has obtained extensive, deep application in national public security system at present, especially in recent years, along with city emergency interlock construction, anti-terrorism, the strong alert demand of public security science and technology, the trunked communication system of many base stations networking has begun to popularize gradually, broken away from original single base station mode, make coverage wider, the dispatch control action is faster, and the user uses also more convenient.
Meanwhile, the foundation of many base stations of 350M networked system is also used the management of portable terminal (hereinafter to be referred as the radio station) and is had higher requirement, under original single base station, Da Qu molding formula, the radio station does not need to consider to cross automatically the problem of net, roaming, if broken away from the coverage of group system, just be transformed into normal mode.But in networked system, the whole area of coverage becomes big, the overlapping area of coverage increases, the radio station is not when breaking away from the coverage of current base station fully, entered the area of coverage of another base station, and that new signal of base station quality may be than original base station is also good, but traditional radio station can not detect this situation and switch to new base station immediately, this will directly have influence on speech quality, also make the large-scale networked systems of building not bring into play better effect.
For this reason, if the method for an energy intelligence, quick base station shifting is arranged, will bring into play the command scheduling function of MPT-1327 trunked communication system better.
Summary of the invention
The purpose of this invention is to provide a kind of MPT-1327 trunking communication system realizing and stride the automatic method of crossing net in base station, its no matter be can intelligence in the MPT-1327 trunked communication system under standby situation or the talking state, base station shifting fast.
For achieving the above object, the present invention takes following design:
A kind of MPT-1327 trunking communication system realizing is striden the automatic method of crossing net in base station, and its method step is as follows:
1) at first declares choosing rule, off-grid condition by what write that yard software writes roaming BTS channel parameter and conclusion in advance in the radio station;
2) under holding state, the periodicity detection is carried out to other signal of base station quality and signal strength signal intensity in the radio station, and testing result is kept in real time in the BTS channel specific list of inside, radio station; After having detected all base stations, rule is selected according to declaring of self in the radio station, determines the base station of signal optimum under the current state, and the control channel number of this base station is preserved;
3) if the signal of current base station satisfies the off-grid condition, if the radio station is under holding state, then switch to new base station and continue standby according to the off-grid action of setting, if the radio station is under talking state, switch to the signal optimum base station, register on the net, initiate new the calling and keep original conversation, promptly stride the automatic net of crossing in base station; If do not satisfy the off-grid condition, then step 2 is continued in the radio station under the ideal case).
Described declare select rule to be:
1) according to the scope of application in radio station, the priority of each base station that is ranked;
2) the weight field intensity difference between per two priority of setting;
3) according to the base station construction position control channel of each base station is arranged in order;
4) with the signal strength test of the control channel of all base stations,, calculate the field intensity value that makes new advances according to the priority and the weight field intensity difference of each channel;
5), obtain signal optimal control channel, just the base station of signal optimum according to new field intensity value.
The off-grid action that described holding state is set down is:
(a) standard scan; Perhaps (b) optimum scanning.
Advantage of the present invention is:
1) can search for the most suitable base station of oneself waiting for automatically, user's percent of call lost reduces greatly.
2) base station shifting in the communication process can guarantee not go offline, and ensures the continuity of command scheduling.
3) advantage of performance networked system large tracts of land covering provides the more speech quality of high-quality.
Description of drawings
Fig. 1 is automatic switchover base station under the holding state of the present invention, realizes the schematic diagram of net, roaming.
Fig. 2 is the base station of automaticallying switch under the talking state of the present invention, realizes the schematic diagram of net, roaming conversation.
Fig. 3 is the process chart of automatic switchover base station under the holding state of the present invention.
Fig. 4 is base station shifting process chart under the talking state of the present invention.
Embodiment
The present invention writes roaming BTS channel parameter and declares choosing rule, off-grid condition by writing yard software in advance in the radio station.
Described roaming base station is meant to allow this radio station in the activity of the base station of which scope that roaming BTS channel parameter that is to say the control channel tabulation of being made up of these roaming base stations, is decided according to the situation of reality use and concrete base station construction by the user.
It is described that to declare choosing rule can be to pass judgment on a kind of strategy of optimum base station according to the ordered radio station of user's actual conditions, introduce below to be that adopt in the embodiment of the invention a kind of declares choosing regular:
1) according to the scope of application in radio station, the priority that each base station sets is different supposes to comprise altogether 4 grades, the 0-3 level, and 3 grades are the highest.
2) the weight field intensity difference between per two priority of setting, unit is-dBm.
Field intensity weight difference between P32:3 level and 2 grades
Field intensity weight difference between P21:2 level and 1 grade
Field intensity weight difference between P10:1 level and 0 grade
3) according to the base station construction position control channel of each base station is arranged in order.
4) signal strength of the control channel of all base stations all after the EOT, according to the priority and the weight field intensity difference of each channel, is calculated the field intensity value that makes new advances.Computational methods are:
0 priority: field intensity newly is worth=actual value
1 priority: field intensity newly is worth=actual value+P10
2 priority: field intensity newly is worth=actual value+P21+P10
3 priority: field intensity newly is worth=actual value+P32+P21+P10
5), obtain signal optimal control channel, just the base station of signal optimum according to new field intensity value.
Described off-grid condition generally be regulation current base station field intensity value when being lower than a certain numerical value (must through on the spot repeatedly test formulate) can carry out off-grid.
The present invention is set in two kinds of off-grid actions under the holding state:
(a) networking is logined in the next base station that standard scan, radio station off-grid are directly switch to later in the control channel tabulation;
(b) optimum scanning: the radio station selects the base station of signal optimum to login networking.
The schematic diagram of network roaming was realized in automatic switchover base station under two kinds of operating states, the radio station that provides current base station that Fig. 1, Fig. 2 are exemplary.
The detailed process that technical solution of the present invention realizes is: current base station of waiting for can of short durationly be left in the radio station of current base station under holding state, detect other signal of base station quality and signal strength signal intensities, detects and finishes to return immediately later former base station again.So periodically carry out, the radio station just records other each signal of base station situations.Inside, radio station has adopted certain declaring to select rule simultaneously, declares the base station of select-out signal optimum and is saved in inside, radio station.Like this, if current base station satisfies the off-grid condition of standard scan under holding state, networking is logined in the next base station that the radio station off-grid is directly switch to later in the control channel tabulation (order that control channel writes when writing yard); If current base station satisfies the off-grid condition of optimum scanning under holding state, then the radio station selects the base station of signal optimum to login networking.If current base station is under talking state, traffic channel has satisfied the off-grid condition, the radio station just can network the signal optimum the base station and make a call immediately, reenter talking state.
Because the radio station of current base station can be searched for the most suitable base station of oneself waiting in real time automatically, this base station is signal strength signal intensity and the optimum state of quality maintenance comparatively speaking, and user's percent of call lost is reduced greatly.
The instant base station shifting of selecting can guarantee not go offline in the communication process, thereby has ensured the continuity (especially for public security system, this point ten minutes important) of command scheduling.
The application of the technology of the present invention makes that networked system can more extensiveization, gives full play to the advantage that the networked system large tracts of land covers, and the more speech quality of high-quality is provided.
The present invention will be further described below in conjunction with specific embodiment:
Base station shifting under embodiment 1. holding states (referring to Fig. 1 and Fig. 3):
Supposing has 4 base stations, arrives base station 4 for base station 1, and its priority is respectively 0,1,2,3, and the field intensity weight difference between each priority base station is 6dBm, sees Table 1
Table 1: weight field intensity difference
| P32 | P21 | P10 | |
| Weight field intensity difference | 6 | 6 | 6 |
At first can be automatic cross the base station scope of net, roaming (base station 1 to the base station 4) and declare choosing regular with writing yard software set radio station.
Suppose that the radio station is current and wait in the base station 1, when the radio station is under the ideal case, the channel of all base stations is all detected end, obtain each signal of base station field intensity and see the following form 2:
Table 2: base station order, control channel number, priority and control channel field intensity value
| The control channel number | Priority | Field intensity (dBm) | Affiliated base station |
| 242 | 0 | -95 | Base station 1 |
| 244 | 1 | -75 | Base station 2 |
| 246 | 2 | -80 | Base station 3 |
| 248 | 3 | -85 | Base station 4 |
According to declaring the choosing rule, the field intensity value of the control channel of each base station of recomputating sees Table 3
Table 3: the field intensity value of the control channel of each base station of recomputating according to above-mentioned rule
| The control channel number | Priority | Field intensity (dBm) | Affiliated base station | New field intensity value |
| 242 | 0 | -95 | Base station 1 | -95 |
| 244 | 1 | -75 | Base station 2 | -69(-75+P10) |
| 246 | 2 | -80 | Base station 3 | -68(-80+P21+P10) |
| 248 | 3 | -85 | Base station 4 | -57(-85+P32+P21+P10) |
Now the signal weaker of place, radio station current base station to satisfy the off-grid condition (smaller or equal to-95dBm) time, if the off-grid of setting action is standard scan, the radio station off-grid is directly switch to the next base-station, base-station 2 in the control channel tabulation later on, logins networking; If optimum scanning switches to base station 4.
Embodiment 2, base station shifting under the talking state (referring to Fig. 2 and Fig. 4):
Suppose identically with embodiment 1, the field intensity data that record are also identical, see Table 3.
The radio station 1 makes a call and enters talking state in the base station, is assigned to traffic channel (for example its channel number is 260).Normal speech communication is carried out in the radio station on the one hand, detects the field intensity of live traffice channel on the other hand.If signal reach software set the off-grid condition (smaller or equal to-95dBm) time, then the radio station switches to signal optimum base station 4.But do not apply for finishing conversation when breaking away from base station 1, system still keeps original conversation like this.
Initiate the request of registering on the net in the new base station that networks 4, carry out authentication, finish into network process.
The request that directly makes a call again after networking in new base station 4, system can divide allocated radio to the base station 4 enterprising words that work of traffic channel.So just finished the base station of striding under the talking state and crossed net, roaming conversation, the process of whole realization is the longest to be 1 second.
The various embodiments described above can not depart from the scope of the present invention down in addition some variations, thus more than explanation comprise and accompanying drawing shown in structure should be considered as exemplary, but not in order to limit claim of the present invention.
Claims (3)
1. a MPT-1327 trunking communication system realizing is striden the automatic method of crossing net in base station, it is characterized in that method step is as follows:
1) at first declares choosing rule, off-grid condition by what write that yard software writes roaming BTS channel parameter and conclusion in advance in the radio station;
2) under holding state, the periodicity detection is carried out to other signal of base station quality and signal strength signal intensity in the radio station, and testing result is kept in real time in the BTS channel specific list of inside, radio station; After having detected all base stations, rule is selected according to declaring of self in the radio station, determines the base station of signal optimum under the current state, and the control channel number of this base station is preserved;
3) if the signal of current base station satisfies the off-grid condition, if the radio station is under holding state, then switch to new base station and continue standby according to the off-grid action of setting, if the radio station is under talking state, switch to the signal optimum base station, register on the net, initiate new the calling and keep original conversation, promptly stride the automatic net of crossing in base station; If do not satisfy the off-grid condition, then step 2 is continued in the radio station under the ideal case).
2. MPT-1327 trunking communication system realizing according to claim 1 is striden the automatic method of crossing net in base station, it is characterized in that: the off-grid action that described holding state is set down is:
(a) standard scan: networking is logined in the next base station that the radio station off-grid is directly switch to later in the control channel tabulation; Perhaps
(b) optimum scanning: the radio station selects the base station of signal optimum to login networking.
3. MPT-1327 trunking communication system realizing according to claim 1 is striden the automatic method of crossing net in base station, it is characterized in that the described choosing rule of declaring:
1) according to the scope of application in radio station, the priority of each base station that is ranked;
2) the weight field intensity difference between per two priority of setting;
3) according to the base station construction position control channel of each base station is arranged in order;
4) with the signal strength test of the control channel of all base stations,, calculate the field intensity value that makes new advances according to the priority and the weight field intensity difference of each channel;
5), obtain signal optimal control channel, just the base station of signal optimum according to new field intensity value.
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| CN102316545B (en) * | 2010-06-30 | 2016-02-10 | 中兴通讯股份有限公司 | The system and method that a kind of flexible control travelling carriage scanning switches |
| CN103139712B (en) * | 2012-12-18 | 2016-04-20 | 广州海格通信集团股份有限公司 | A kind of zone digit trunked communication system is anti-ruins recombination method |
| CN106507222A (en) * | 2017-01-10 | 2017-03-15 | 深圳森虎科技股份有限公司 | The method that the transmitter receiver automatically selects intermediate station under IP interconnection modes |
| CN109219034B (en) * | 2017-07-07 | 2023-04-28 | 福建省万华电子科技有限公司 | Roaming relay station and roaming realization method thereof |
| CN109511147A (en) * | 2019-01-09 | 2019-03-22 | 福建环球通通讯有限公司 | A kind of intercom automatic roaming system and method |
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