CN101378552B - Automatic switchover technology for MPT1327 analog cluster communication terminal call between base stations - Google Patents
Automatic switchover technology for MPT1327 analog cluster communication terminal call between base stations Download PDFInfo
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- CN101378552B CN101378552B CN2008100646780A CN200810064678A CN101378552B CN 101378552 B CN101378552 B CN 101378552B CN 2008100646780 A CN2008100646780 A CN 2008100646780A CN 200810064678 A CN200810064678 A CN 200810064678A CN 101378552 B CN101378552 B CN 101378552B
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Abstract
The invention provides an automatic switching technology of trans-base-station conversation of an MPT1327 analog-cluster communication terminal. The terminal is locked to a system; the base station number of a locking system is firstly searched; when a field signal is weaker than a set threshold value, background scan is started, and the scan is carried out according to the input sequence of four base stations with overlapped coverage into a switching table; when a conversation is over and the status is off-line, a control signal channel just switched to the base stations with overlapped coverage is checked, and re-registration is carried out if a registration condition is met. If the control signal channel is succeed in registration, the scan is conducted according to the scan method set by the terminal until a signal channel meeting the condition is found, and re-registration is carried out. By improving the prior art, the automatic switching technology causes the terminal to automatically choose a base station with a stronger signal when in mobile conversation within an overlapped region of the stations; free switch is also available after getting on line within an overlapped region of a plurality of base stations; conversation on a base station with the strongest field signal is always available so as to ensure the quality of speech and no occurrence of loosing lock once the signal becomes weaker.
Description
(1) technical field
The present invention relates to mechanics of communication, be specifically related to a kind of communication terminal and stride the base station communicating tech.
(2) background technology
Prior art existing problems: the conversation of the colony terminal of MPT1327 simulation is in the past striden the base station when moving, the area of coverage from former base station is more and more far away, the speech that can not finish this conversation at the area of coverage of new base station automaticallyes switch, go offline at two overlapping areas of coverage in base station like this, terminal is search base station again, just can make a call once more after the registration.
(3) summary of the invention
The object of the present invention is to provide a kind of by improving existing MPT1327 simulation trunked communication system and terminal technology, make terminal in the overlapping area of coverage in base station during mobile call, automatic selecting signal guarantees that than the strong basis station the unbroken MPT1327 of conversation simulates cluster communication terminal and strides base station conversation automatic switchover technology.
The object of the present invention is achieved like this:
1, substance and parameter
Terminal is supported to stride 24 base station speeches at most and is automaticallyed switch.Can there be 4 overlapping coverage base stations each base station.Corresponding each base station is provided with a systematic code parameter, two control channel parameters, two traffic channel parameters, four overlapping coverage base stations in terminal.2 control channels of each base station have one at least and will have (depending primarily on and adopting control channel table scan mode still is flexible channels plan surface sweeping mode) in control channel table or flexible channels planning charts.The traffic channel that is written in the switching table (switching table is the relevant information that is used for storing 24 base stations) is corresponding with the traffic channel of system, guarantees to lock onto the correct traffic channel of base station.The groups that allow to be provided with 10 level and smooth groups are at most wailed, and each group is wailed and can be associated with any several or whole in 24 base stations.
The background scanning of overlapping coverage base station (background scanning is in the process of traffic channel normal talking, when local field intensity signal is more weak, and the process of removing the overlapping coverage base station of surface sweeping) control by Several Parameters:
Start switch level: refer to a fixed level value setting in advance.The field intensity of this channel is weaker than this set point, begins to start the background scanning program;
Handoff threshold level difference: refer to this channel field intensity set in advance and the difference of overlapping coverage base station field intensity.When the field intensity of overlapping coverage base station is better than the difference of this setting than the field intensity of this channel, then switch to overlapping coverage base station channel;
Switching time is at interval: the time interval of first overlapping coverage base station of terminal searching and the next overlapping coverage base station of search;
Emission switching time receiving interbody spacer: terminal is at the state of emission, when the time of setting then, transfer the time value of accepting state to.
2, realize the principle summary
Terminal locking is at first searched the basic station number of locking system to system, only finds basic station number, could confirm 4 overlapping coverage base stations of its association.Terminal is reached the standard grade at the overlapping area of coverage, when the field intensity signal is weaker than the threshold value of setting, the beginning background scanning, the order of scanning is to carry out according to the sequencing that writes 4 overlapping coverage base stations in the switching table, when detecting associated overlapping coverage base station field intensity signal when stronger than the locking base station signal, if in accepting state, then directly lock onto the strong base station of signal.If emission state, then on the base station of locking, send a signaling Maint1, reporting system is not in emission state in this base station. just can lock onto the stronger superimposition lid base station of signal afterwards, and transmission signaling Maint0, reporting system will be launched in this base station. when end of conversation rolls off the production line, at first detect the control channel of the superimposition lid base station that has just switched to,, set up new registration procedure if satisfy registration condition.If this control channel is not registered success, then can scan according to the scan mode that terminal is set, up to finding the channel that satisfies condition, set up new registration procedure.
3, implementation method
Making the accepting state flow chart in conjunction with Fig. 1 describes in detail:
1, after MPT simulation colony terminal locks onto system, begin to search the traffic channel switching table, by locking onto the systematic code of this system, from table, find relevant base station number, systematic code is the unique identification of basic station number, if can not find the basic station number of systematic code correspondence, do not write this base station in the instruction card, then do not enter background scanning.
2, after finding basic station number, just confirmed the base station of current locking, by the locking base station, search 4 overlapping coverage base stations, the control channel of judging each overlapping coverage base station whether in the table of defined (if control channel table scan mode or section scan mode, then will be in the control channel table.If flexible channels plan scan mode, then will be in the flexible channels planning chart.) if two control channels all do not have in the table of defined, then this overlapping coverage base station are put sky, represent not related this overlapping coverage base station, just can not scan this base station in the time of background scanning.
3, after terminal was reached the standard grade, judgement group attribute was level and smooth group, and in accepting state, then enters the background scanning process.
4, at first determine the group number of level and smooth group, search overlapping coverage base station number by group number, this overlapping coverage base station comprises several or whole in 24 base stations, be mainly used to control when calling out this group number, have only with this group number associated base station and can respond, do not have related base station can not reach the standard grade.
5, judge 4 overlapping coverage base stations of locking base station respectively,, illustrate that this base station does not write overlapping coverage base station, then do not enter background scanning if 4 overlapping coverage base stations all are empty.
6, the traffic channel of judging the place concrete position in table.Do mark, lock corresponding position during in order to switching.If do not find, illustrate that then this traffic channel not in table, does not then carry out background scanning.
7, " switching channels time " mainly is trace interval between the overlapping coverage base station of control.For example: after having scanned first overlapping coverage base station, " the switching channels time " that set by the time to the time just can scan second overlapping coverage base station.
8, be the field intensity that detects this base station call channel herein, if the field intensity value that detects is stronger than " switch level " field intensity value of setting, then can not enter background scanning, can reset again " switching channels time " this moment, is used for controlling detecting this channel field intensity next time.
If a little less than " switch level " field intensity value of the 9 field intensity values that detect than setting, then to detect the field intensity of overlapping coverage base station, before detecting, at first to determine to detect which overlapping coverage base station, default situations is to detect first overlapping coverage base station earlier.
10, determine overlapping coverage base station after, the Several Parameters of searching overlapping coverage base station: comprise systematic code, control channel, traffic channel, upgrade relevant parameter in the time of in order to follow-up locking.According to step 6, can judge to lock onto which traffic channel.For example: the traffic channel of this channel is first channel, and then overlapping coverage base station also locks onto first channel.
11, lock overlapping coverage base station, detect the field intensity value of overlapping coverage base station, if a little less than the field intensity value of the field intensity of overlapping coverage base station than setting, then do not switch, withdraw from scanning mode, write down overlapping coverage base station sequence number this moment, so that next the overlapping coverage base station with this sequence number is an initial state when scanning next time.
If the field intensity of 12 overlapping coverage base stations is stronger than the field intensity value of setting, then lock overlapping coverage base station channel.And overlapping coverage base station is set at current base station, and upgrade relevant parameter, continue on this channel, to start background scanning.
Describe in detail in conjunction with Fig. 2 emission state flow chart:
If 1 terminal is reached the standard grade with level and smooth group, and, then start timer, the time that control emission switching is received at emission state.Between the emission switching time receiving here is dynamic change, calculates the length of time automatically according to the power of field intensity.Change with linear relationship, can be by writing the variation of some parameter control slope of software set frequently.
2, when time that emission switching is received then, can transfer accepting state to, will walk the whole flow process that receives previously this moment.
3, it is stronger than the threshold level value of setting to detect this channel field intensity, does not satisfy the condition that enters background scanning, can forward the state of emission again to, and reactivates timer and calculate the time that goes back to reception next time.
4, detect a little less than the threshold level value of this channel field intensity than setting, satisfy the condition that enters background scanning, can lock onto overlapping coverage base station, in the field intensity that detects overlapping coverage base station.Detect a little less than the threshold level value of overlapping coverage base station field intensity ratio setting, do not satisfy the condition of locking, can lock back original channel again, forward emission state to, and reactivate the next time that goes back to reception of timer calculating.
If 5 overlapping coverage base stations satisfy condition, will lock onto overlapping coverage base station, before locking, lock back earlier this channel, send a signaling Maint1 to system, reporting system stops to send at this channel, and corresponding processing can be done after receiving signaling by system.
6, lock onto overlapping coverage base station, send signaling Maint0, reporting system is launched on this base station.
7, overlapping coverage base station is set at current base station, upgrades relevant parameter, continue on this channel, to start background scanning.
Advantage of the present invention is exactly freely to switch after the overlapping area of coverage of many base stations is reached the standard grade, and always can remain on the strongest base station of field intensity and converse, and has guaranteed the quality of speech, in case the situation of signal weaker with regard to losing lock can not occur.Compare with technology in the past, not only saved the time, also improved operating efficiency,, can keep continuing conversation and can not go offline especially in the relatively more crucial moment.Do not have before this technology, after the overlapping area of coverage is reached the standard grade, when the base station signal of locking is more weak, can go for the stronger base station of signal yet and lock, up to finally not carrying out normal talking and even losing lock, just can carry out again rebuliding calling after signaling channel scanning, the locking.
(4) description of drawings
Fig. 1 is an accepting state flow chart of the present invention;
Fig. 2 is the emission state flow chart;
Fig. 3 simulates the process schematic diagram that terminal inter-zone call is on the spot shifted.
(5) embodiment
The present invention is further illustrated below in conjunction with the drawings and specific embodiments:
In conjunction with Fig. 3, this figure simulates the process that terminal inter-zone call is on the spot shifted, and this moment, the overlapping coverage base station of base station 3 was base station 1,2,4,5.Suppose that terminal 3 switches to base station 5 from the base station, describes below its implementation procedure:
Accepting state:
Terminal locking is in the base station 3, after setting up level and smooth group calls in several, the reach the standard grade traffic channel 1 of base station 3, the field intensity of base stations detected 3 traffic channels 1, strong and weak then and there when set point, scan overlapping coverage base station, the order of scanning is to carry out according to the sequencing that writes 4 overlapping coverage base stations in the switching table, scan corresponding traffic channel 1 successively, when the traffic channel 1 of base station 5 satisfies condition, then locking.Behind the end of conversation, terminal will be returned control channel, at first can select two control channels of base station 5 to lock, if do not satisfy locking condition, then the scan mode of setting according to terminal scans.
Emission state:
When pinning PTT in the process of speech, if after scanning is all finished, the same accepting state of the process of scanning.Be about to now from the base station 3 and switch to base station 5, at first will send signaling Maint1 on base station 3, reporting system has not been at this channel says speech phase, then transmission signaling maint0 on base station 5, and reporting system is at this channel says speech phase.
If level and smooth group that is called out includes only 3,4,5 base stations, then only between 3,4,5, switch, though overlapping coverage base station comprises 1,2, can not switch on the base station 1,2.
The present invention has the interrupted of very short time in the overlapping coverage base station of scanning, but can not have influence on conversation.Concrete break time is as follows:
Delay test when 1, the strong detection of emission switching end is stablized
Time-delay test data when the strong detection of table 1 emission switching end is stablized
| Time (ms) | Stability (differing several) with actual field intensity |
| 200 | Normally |
| 150 | Normally |
| 140 | Normally |
| 135 | Normally |
| 130 | Substantially normal |
| 125 | 3～4dBm |
| 100 | 10dBm |
2, accepting state time break theoretical value
1), this channel field intensity is better than set point
No time break
2), this channel field intensity is weaker than set point, overlapping coverage base station field intensity also is weaker than set point
Table 2 accepting state time break theoretical value
| Lock overlapping coverage base station | The wait field intensity is stable | Lock is with this base station |
| 20ms | 35ms | 20ms+30ms |
3), this channel field intensity is weaker than set point, overlapping coverage base station field intensity is better than set point, locks onto overlapping coverage base station
Table 3 accepting state time break theoretical value
| Lock overlapping coverage base station | The wait field intensity is stable |
| 20ms | 35ms+30ms |
3, emission is interrupted theoretical value between the switching time receiving
1), this channel field intensity is better than set point
Be interrupted theoretical value between the table 4 emission switching time receiving
| Emission-reception (locking phase-locked loop) | Received field strength stabilization time | Reception-emission (locking phase-locked loop) |
| 20ms | 135ms | 50ms |
2), this channel field intensity is weaker than set point, overlapping coverage base station field intensity also is weaker than set point
Be interrupted theoretical value between the table 5 emission switching time receiving
| Send out-receive (PLL) | Stabilization time | Overlapping coverage base station detection time | Receive-send out (PLL) |
| 20ms | 135ms | 60ms | 50ms |
3), this channel field intensity is weaker than set point, overlapping coverage base station field intensity is better than set point, locks onto overlapping coverage base station
Be interrupted theoretical value between the table 6 emission switching time receiving
| Send out-receive (PLL) | Stabilization time | Overlapping coverage base station detection time | Receive-send out (PLL) | ?Maint1(off) | Change related emission (PLL) | Maint0(on) |
| 20ms | 135ms | 55ms | 20ms | ?83ms | 20ms | 83ms |
4, actual test data
The actual test data table of table 7
Claims (1)
1. a MPT1327 simulation cluster communication terminal is striden base station conversation automatic switching method, it is characterized in that: MPT1327 simulation cluster communication terminal locks onto system, at first searches the basic station number of locking system, confirms 4 overlapping coverage base stations of its association; Terminal is reached the standard grade at the overlapping area of coverage, when the field intensity signal is weaker than the threshold value of setting, the beginning background scanning, the order of scanning is to carry out according to the sequencing that writes 4 overlapping coverage base stations in the switching table, when detecting associated overlapping coverage base station field intensity signal when stronger than the locking base station signal, if in accepting state, then directly lock onto the strong base station of signal; If emission state, then will send a signaling Maint1 on the base station of locking, reporting system is not in emission state in this base station, just can lock onto the stronger overlapping coverage base station of signal afterwards, and sending signaling Maint0, reporting system will be launched in this base station; When end of conversation rolls off the production line, at first detect the control channel of the overlapping coverage base station that has just switched to,, set up new registration procedure if satisfy registration condition; If this control channel is not registered success, then can scan according to the scan mode that terminal is set, up to finding the channel that satisfies condition, set up new registration procedure; Described MPT1327 simulation cluster communication terminal is supported to stride 24 base station speeches at most and is automaticallyed switch, can there be 4 overlapping coverage base stations each base station, and corresponding each base station is provided with a systematic code parameter, two control channel parameters, two traffic channel parameters, four overlapping coverage base stations in terminal; Two control channels of each base station have at least one will exist in control channel table or flexible channels planning chart; The traffic channel that is written in the switching table of the relevant information that is used for storing 24 base stations is corresponding with the traffic channel of system, and the groups that 10 level and smooth groups are set are at most wailed, and each group is wailed and can be associated with any several or whole in 24 base stations;
During described accepting state:
(1) after MPT1327 simulation cluster communication terminal locks onto system, begin to search the traffic channel switching table, by locking onto the systematic code of this system, from table, find relevant base station number, systematic code is the unique identification of basic station number, if can not find the basic station number of systematic code correspondence, do not write this base station in the instruction card, then do not enter background scanning;
(2) after finding basic station number, just confirmed the base station of current locking, by the locking base station, search 4 overlapping coverage base stations, whether the control channel of judging each overlapping coverage base station is in the table of defined; If two control channels all do not have in the table of defined, then this overlapping coverage base station is put sky, represent not related this overlapping coverage base station, just can not scan this base station in the time of background scanning;
(3) after terminal was reached the standard grade, judgement group attribute was level and smooth group, and in accepting state, then enters the background scanning process;
(4) at first determine the level and smooth group number of organizing, search overlapping coverage base station number by group number, this overlapping coverage base station comprises and several or whole in 24 base stations is used for control when this group number of calling, have only with this group number associated base station and can respond, do not have related base station can not reach the standard grade;
(5) judge 4 overlapping coverage base stations that lock the base station respectively,, illustrate that this base station does not write overlapping coverage base station, then do not enter background scanning if 4 overlapping coverage base stations all are empty;
(6) mark is done in the traffic channel of judging the place concrete position in table, locks corresponding position during in order to switching; If do not find, illustrate that then this traffic channel not in table, does not then carry out background scanning;
(7) " switching channels time " mainly is trace interval between the overlapping coverage base station of control;
(8) detect the field intensity of this base station call channel, if the field intensity value that detects is stronger than " switch level " field intensity value of setting, then can not enter background scanning, can reset again " switching channels time " this moment, is used for controlling detecting this channel field intensity next time;
(9) if a little less than " switch level " field intensity value of the field intensity value that detects than setting, then to detect the field intensity of overlapping coverage base station, before detecting, at first will determine to detect which overlapping coverage base station;
(10) determine overlapping coverage base station after, the Several Parameters of searching overlapping coverage base station: comprise systematic code, control channel, traffic channel, upgrade relevant parameter in the time of in order to follow-up locking; According to step (6), can judge to lock onto which traffic channel;
(11) lock overlapping coverage base station, detect the field intensity value of overlapping coverage base station, if a little less than the field intensity value of the field intensity of overlapping coverage base station than setting, then do not switch, withdraw from scanning mode, write down overlapping coverage base station sequence number this moment, so that next the overlapping coverage base station with this sequence number is an initial state when scanning next time;
(12) if the field intensity of overlapping coverage base station is stronger than the field intensity value of setting, then locks overlapping coverage base station channel, and overlapping coverage base station is set at current base station, upgrade relevant parameter, continue on this channel, to start background scanning;
During described emission state:
(1) if terminal is reached the standard grade with level and smooth group, and, then starts timer, the time that control emission switching is received at emission state;
(2) when time that emission switching is received then, can transfer accepting state to, will walk the whole flow process that receives previously this moment;
(3) it is stronger than the threshold level value of setting to detect this channel field intensity, does not satisfy the condition that enters background scanning, can forward the state of emission again to, and reactivates timer and calculate the time that goes back to reception next time;
(4) detect a little less than the threshold level value of this channel field intensity than setting, satisfy the condition that enters background scanning, can lock onto overlapping coverage base station, detect the field intensity of overlapping coverage base station again; Detect a little less than the threshold level value of overlapping coverage base station field intensity ratio setting, do not satisfy the condition of locking, can lock back original channel again, forward emission state to, and reactivate the next time that goes back to reception of timer calculating;
(5) if overlapping coverage base station satisfies condition, will lock onto overlapping coverage base station, and before locking, lock back earlier this channel, and send a signaling Maint1 to system, reporting system stops to send at this channel, and corresponding processing can be done after receiving signaling by system;
(6) lock onto overlapping coverage base station, send signaling Maint0, reporting system is launched on this base station;
(7) overlapping coverage base station is set at current base station, upgrades relevant parameter, continue on this channel, to start background scanning.
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| CN102857983B (en) * | 2011-06-30 | 2017-02-15 | 上海中兴软件有限责任公司 | Listening user switching method in trunking system, network side and terminal |
| CN104683585B (en) * | 2015-03-06 | 2017-10-17 | 广东欧珀移动通信有限公司 | A kind of mobile terminal and its intelligent call transfer method |
| CN108449781B (en) * | 2018-04-16 | 2020-07-17 | 福建科立讯通信有限公司 | Method and system for realizing roaming of terminal in narrow-band wireless digital communication system |
| CN111148241B (en) * | 2018-11-05 | 2023-09-05 | 海能达通信股份有限公司 | Mobile terminal rapid registration method, mobile terminal and network management system |
| 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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