CN102026315A - Method for realizing uninterrupted cross base station call of mobile terminal in normal mode - Google Patents
Method for realizing uninterrupted cross base station call of mobile terminal in normal mode Download PDFInfo
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- CN102026315A CN102026315A CN2010106104909A CN201010610490A CN102026315A CN 102026315 A CN102026315 A CN 102026315A CN 2010106104909 A CN2010106104909 A CN 2010106104909A CN 201010610490 A CN201010610490 A CN 201010610490A CN 102026315 A CN102026315 A CN 102026315A
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Abstract
The invention provides a method for realizing unineterrupted cross base station call of a mobile terminal in a normal pattern without the participation of a base station in an exchanging process. The method is realized by rapid cross base station switch of the mobile terminal, and the rapid cross base station switch process of the mobile terminal comprises two parts: one part is a cross base station calling establishment stage, and the other part is a base station switch stage of the mobile terminal; and the starting condition of the base station switch is that the mobile terminal is utilized to detect the current call base station signal quality to serve as a judging condition, if the current conversation base station signal quality is lower than the threshold value set by the mobile terminal, adjacent base station scanning function is started, and if the switch condition is satisfied, the mobile terminal switches the base station. The method has the advantages that the base station is autonomously switched in the call process, continuous call is maintained, the realizing difficulty of the base station and the normal mobile terminal is lowered, rapid cross base station switch of a normal mobile terminal is realized in a half-duplex pattern.
Description
(1) technical field
The present invention relates to the communication technology, is exactly that a kind of portable terminal of realizing under normal mode is striden the base station continual method of conversing specifically.
(2) background technology
Along with the development of private network communication, normal mode is with its rapid networking, characteristic such as easy to use, in industry extensive uses such as public security, harbour, forestry, railways; Along with enhancing to cover requiring on a large scale, adopt various link modes that the signal-relay station of base station is carried out technology interconnected, increase coverage and obtained very big development, realized that the portable terminal under the different signal-relay stations interconnects.But also only having provided, the networking of the routine of many base stations strides the base station call function, what portable terminal can't realize being similar to public network between neighbor base station strides the unbroken function of base station speech, in communication process,, can interrupt this conversation if portable terminal exceeds the coverage of this base station; Portable terminal palpus manual switchover working channel could also continue original conversation by base station shifting.Conversation is not interrupted if portable terminal can realize striding the base station, has very important significance for highway traffic police Order Wire Communication or large-scale activity communication support, can at utmost guarantee calling quality.At present private network what stride that autonomous base station shifting adopts in the communication process of base station is the common-frequency simulcasting pattern, under this pattern, because the operating frequency of each base station signal-relay station is identical, so the striding base station conversation and can not be interrupted of portable terminal, just the terminal field intensity that is received according to each base station by the base station controller of common-frequency simulcasting is judged and should be transmitted the speech which base station receives.And this pattern that conventional signal-relay station is interconnected, the operating frequency of each adjacent base station and inequality, and do not have standard to come regulation corresponding mobile terminal to realize striding the base station continual method of conversing.Adjacent base station adopts with pattern frequently, can cause at overlapping area of coverage speech quality to descend, owing to need carry out the choosing of declaring of speech, has caused certain signal delay.Common-frequency simulcasting pattern base station equipment complexity, the cost height, the fault point is many.
(3) summary of the invention
The object of the present invention is to provide a kind of need current base station and preset the signal of base station quality and can determine whether switch relatively in communication process, the normal mode that handoff procedure does not need the base station to participate in realizes that down portable terminal strides the base station continual method of conversing.
The object of the present invention is achieved like this: normal mode realizes that down portable terminal strides the base station continual method of conversing, it is to switch realization by the base station of striding fast of portable terminal, the base station handoff procedure of striding fast of portable terminal is made up of two parts, a part is to stride the base station call establishment stage, and another part is the portable terminal base station shifting stage; The described base station call establishment stage implementation procedure of striding is: portable terminal is initiated call request, and after the base station received and strides the base station call request, control participated in the base station of this conversation talker's speech is transmitted; Portable terminal base station shifting stage implementation procedure in the described communication process is: after portable terminal entered communication process, portable terminal needed continuous inspection whether to satisfy the entry condition of base station shifting; If satisfy entry condition, then according to the frequency meter that presets, and be field intensity or the signal to noise ratio or the error rate according to the signal quality that the order of preferred base station begins the comparison neighbor base station, judge whether to satisfy switching condition; If satisfy switching condition then base station shifting immediately; Otherwise not satisfying switching condition then still converses on original base station.
The present invention also has following technical characterictic:
(1) entry condition of described base station shifting adopts portable terminal to detect current talking base station signal quality as Rule of judgment, when if current talking base station signal quality is lower than the threshold value of portable terminal setting, then start the scanning neighboring base station functions, when satisfying switching condition, the portable terminal base station shifting.
(2) described switching condition adopts one of following several modes:
1) relative signal quality: each signal of base station quality of portable terminal continuous monitoring, when the signal quality of certain adjacent base station surpasses current base station, just initiate to switch;
2) the relative signal quality of thresholding is arranged: each signal of base station quality of portable terminal continuous monitoring, when the signal quality of certain adjacent base station surpasses current base station, and the signal quality of current base station initiates to switch when being lower than a certain thresholding;
3) the relative signal quality of hysteresis is arranged: each signal of base station quality of portable terminal continuous monitoring, when the signal quality of certain adjacent base station surpasses hysteresis scope of current base station signal quality, just initiate to switch;
4) have and lag behind and the relative signal quality of thresholding: each signal of base station quality of portable terminal continuous monitoring, when the signal quality of certain adjacent base station surpasses hysteresis scope of current base station, and when the signal quality of current base station is lower than some thresholdings, just initiate to switch;
5) the relative signal quality of lag time is arranged: each signal of base station quality of portable terminal continuous monitoring, when the signal quality of certain adjacent base station signal quality height than current base station, and in period of time hereafter, all keep signal quality height than current base station, this moment just to begin to switch.
Normal mode of the present invention realizes that down portable terminal strides the base station continual method of conversing, portable terminal only need compare current base station and preset the signal of base station quality just to determine whether switch in communication process, do not need the base station to participate in, the user just can not hear signaling between words yet, does not therefore influence communication effect; With respect to the common-frequency simulcasting pattern, base station equipment is simple, reliable, and handoff procedure does not need the base station to participate in; Be applicable to the various systems that conventional signal-relay station is networked, do not need to transform, keep existing investment.The present invention guarantees portable terminal autonomous base station shifting in communication process in the overlapping area of coverage of conventional signal-relay station, keep conversation continuously, reduce the realization difficulty of base station and conventional portable terminal, realize that conventional portable terminal is striden the base station switching fast under the semiduplex mode in communication process.
(4) description of drawings
Fig. 1 is that chain net height speed highway network covers schematic diagram;
Fig. 2 is that the planar net in urban environment or city, transport hub covers schematic diagram;
Fig. 3 is for can mobile direction with portable terminal being defined as the schematic diagram of both direction;
Fig. 4 is for can mobile direction with portable terminal being defined as the schematic diagram of three directions;
Fig. 5 is for can mobile direction with portable terminal being defined as the schematic diagram of four direction;
Fig. 6 is for can mobile direction with portable terminal being defined as the schematic diagram of five directions;
Fig. 7 is for can mobile direction with portable terminal being defined as the schematic diagram of six direction;
Fig. 8 is for striding base station call establishment stage flow chart;
Fig. 9 is a portable terminal base station shifting stage flow chart in the communication process;
Figure 10 is a portable terminal base station shifting stage schematic diagram in the communication process.
(5) embodiment
The invention will be further described for example below in conjunction with accompanying drawing.
Embodiment 1: in conjunction with Fig. 8, Fig. 9, Figure 10, a kind of normal mode of the present invention realizes that down portable terminal strides the base station continual method of conversing: it is to be switched and realized by the base station of striding fast of portable terminal, the base station handoff procedure of striding fast of portable terminal is made up of two parts, a part is to stride the base station call establishment stage, and another part is the portable terminal base station shifting stage; The described base station call establishment stage implementation procedure of striding is: portable terminal is initiated call request, and after the base station received and strides the base station call request, control participated in the base station of this conversation talker's speech is transmitted; Portable terminal base station shifting stage implementation procedure in the described communication process is: after portable terminal entered communication process, portable terminal needed continuous inspection whether to satisfy the entry condition of base station shifting; If satisfy entry condition, then according to the frequency meter that presets, and be field intensity or the signal to noise ratio or the error rate according to the signal quality that the order of preferred base station begins the comparison neighbor base station, judge whether to satisfy switching condition; If satisfy switching condition then base station shifting immediately; Otherwise not satisfying switching condition then still converses on original base station.
The present invention also has following technical characterictic:
The entry condition of described base station shifting adopts portable terminal to detect current talking base station signal quality as Rule of judgment, when if current talking base station signal quality is lower than the threshold value of portable terminal setting, then start the scanning neighboring base station functions, when satisfying switching condition, the portable terminal base station shifting.
Described switching condition adopts one of following several modes: the relative signal quality: each signal of base station quality of portable terminal continuous monitoring, when the signal quality of certain adjacent base station surpasses current base station, just initiate to switch; The relative signal quality that thresholding is arranged: each signal of base station quality of portable terminal continuous monitoring, when the signal quality of certain adjacent base station surpasses current base station, and the signal quality of current base station initiates to switch when being lower than a certain thresholding; The relative signal quality that hysteresis is arranged: each signal of base station quality of portable terminal continuous monitoring, when the signal quality of certain adjacent base station surpasses hysteresis scope of current base station signal quality, just initiate to switch; The relative signal quality that hysteresis and thresholding are arranged: each signal of base station quality of portable terminal continuous monitoring, when the signal quality of certain adjacent base station surpasses hysteresis scope of current base station, and when the signal quality of current base station is lower than some thresholdings, just initiate to switch; The relative signal quality that arranged lag time: each signal of base station quality of portable terminal continuous monitoring, when the signal quality of certain adjacent base station signal quality height than current base station, and in period of time hereafter, all keep signal quality height than current base station, this moment just to begin to switch.
Embodiment 2: technical essential of the present invention is as follows: be operated in the portable terminal under the alien frequencies half-duplex normal mode, the method for base station shifting in communication process; Portable terminal presets according to certain rule and presets operating frequency, and regulation moving direction number; Portable terminal is according to the entry condition that preestablishes switching, and whether autonomous this signal of base station of differentiation quality satisfies the entry condition of switching in communication process; The portable terminal that satisfy to switch entry condition is according to the frequency meter that presets, and scans according to the order of preferred base station, seeks the base station of satisfying switching condition; The portable terminal that satisfies switching condition independently carries out the base station and switches.
Embodiment 3: in conjunction with Fig. 1-Figure 10, the frequency planning of base station and portable terminal: the tranmitting frequency of each base station of common-frequency simulcasting pattern is identical respectively with receive frequency, so portable terminal only need use a class frequency to get final product; But, need store the signal-relay station frequency of each base station in advance, so there is the problem of a frequency planning at the portable terminal that adopts under the conventional base station networking pattern.Communication at city, suburb and highway covers requirement, the communication network topology structure can be divided into following two kinds:
1, highway chain net
As Fig. 1, be example with chain net height speed highway, each signal-relay station of networking adopts frequency multiplexing mode, only needs to adopt 3 class frequencys, both can finish the covering of chain net; Accordingly, minimum needs of terminal write 3 class frequency information and get final product.
2, planar network
For the planar net in urban environment or city, transport hub, as shown in Figure 2.Each signal-relay station of networking adopts frequency multiplexing mode, only needs to adopt 7 class frequencys, both can finish the covering of chain net; Accordingly, minimum needs of terminal write 7 class frequency information and get final product.
3, analysis-by-synthesis
Above two analyses all be based on limiting case, and the topological structure of communication network may be a structure as Fig. 3, Fig. 4, Fig. 5, Fig. 6 and Fig. 7 in actual the use, or their combining structure; So it is just passable that portable terminal only need be stored the intersection of all base station frequencies in advance.
4, the base station handoff procedure of portable terminal
Portable terminal writes the frequency information of the base station of respectively networking in advance, and whether the signal quality of current base station and neighbor base station relatively in communication process according to the entry condition and the base station shifting condition of base station shifting, determines base station shifting.Improve the method for mobile terminal to search base station speed:
In order to improve the speed of mobile terminal to search neighbor base station, portable terminal can mobile direction can be defined as both direction, three directions, four direction, five directions, six direction.Simultaneously when the portable terminal preset parameter, according to certain regular predetermined frequency parameter and direction number.Its base station geographical distribution of portable terminal is as follows:
1, both direction:
As shown in Figure 3, base station 1, the base station of base station 2 for switching recently, base station 3, base station 4 are to have carried out once switching the base station that the back will be switched for the second time, and wherein base station 1,3 is a direction, and base station 2,4 is another direction, if switch to base station 1 for the first time, then may switch to base station 3 and base station 0, must not be base station 2 and base station 4, and most possible direction be base station 3 next time; The switching next time of base station 2 in like manner may be base station 4 and base station 0, and most possible direction is base station 4.Referring to table 1
Table 1
| The first preferred base station | The second preferred base |
| Base station | |
| 1 | |
| |
|
This kind situation can satisfy the common requirement of chain net, and putting in order and direction number of the base station of presetting according to portable terminal dwindled the hunting zone in addition, improves switch speed.
2, three directions:
As shown in Figure 4, base station 1-3 is most possible base station of switching, and basic orientation as long as took place once to switch, just can be determined in the base station of base station 4-9 for switching for the second time.For example for the first time switch to base station 1, switch to base station 4,5 the so most possible second time, by that analogy.Referring to table 2:
Table 2
| The first preferred base station | The second preferred base |
| Base station | |
| 1 | |
| |
|
| |
|
3, four direction:
As shown in Figure 5, base station 1-4 is most possible base station of switching, and basic orientation as long as took place once to switch, just can be determined in the base station of base station 5-12 for switching for the second time.For example for the first time switch to base station 1, switch to base station 5,6,7 the so most possible second time, by that analogy.Referring to table 3:
Table 3
| The first preferred base station | The second preferred base station |
| Base |
Base |
| Base |
Base station 7, |
| Base |
Base |
| Base |
Base |
4, five directions:
As shown in Figure 6, base station 1-5 is most possible base station of switching, and basic orientation as long as took place once to switch, just can be determined in the base station of base station 6-15 for switching for the second time.For example for the first time switch to base station 1, switch to base station 6,7 the so most possible second time, by that analogy.Referring to table 4:
Table 4
| The first preferred base station | The second preferred base station |
| Base |
Base |
| Base |
Base |
| Base |
Base |
| Base |
Base |
| Base |
Base |
5, six direction:
As shown in Figure 7, base station 1-6 is most possible base station of switching, and basic orientation as long as took place once to switch, just can be determined in the base station of base station 7-18 for switching for the second time.For example for the first time switch to base station 1, switch to base station 7,8,9 the so most possible second time, by that analogy.Referring to table 5:
Table 5
| The first preferred base station | The second preferred base |
| Base station | |
| 1 | Base station 7, |
| |
|
| |
|
| |
|
| |
|
| |
|
This method can contain the various network coverage geographical distributions that may occur substantially, and the directioin parameter that utilizes portable terminal to preset dwindles and switches the hunting zone for the second time.
Use the present invention's front and back contrasts (referring to Figure 10):
1, before use the present invention:
The switching of portable terminal just can scan switching after having only the B of arrival or D point, has passed through one section unacceptable speech quality zone in the meantime; Perhaps portable terminal carries out manual switchover at the overlapping area of coverage of A-B or C-D, to the having relatively high expectations of user, influences the user and uses in practical operation.
2, behind use the present invention:
Portable terminal when signal quality satisfies entry condition, begin scanning, find the base station of satisfying switching condition after, the base station of promptly automaticallying switch, portable terminal always works on the good base station of signal quality.
Abbreviation and Key Term definition:
Signal quality: the field intensity or the signal to noise ratio or the error rate that are meant signal.
Claims (4)
1. a normal mode realizes that down portable terminal strides the base station continual method of conversing, it is to switch realization by the base station of striding fast of portable terminal, it is characterized in that: the base station handoff procedure of striding fast of portable terminal is made up of two parts, a part is to stride the base station call establishment stage, and another part is the portable terminal base station shifting stage; Stride after the base station call establishment stage is meant that the base station receives the mobile terminal call request, control participates in the base station of this conversation talker's speech is transmitted, the portable terminal base station shifting stage independently judges whether base station shifting by portable terminal after being meant that then portable terminal enters communication process; The described base station call establishment stage implementation procedure of striding is: portable terminal is initiated call request, and after the base station received and strides the base station call request, control participated in the base station of this conversation talker's speech is transmitted; Portable terminal base station shifting stage implementation procedure in the described communication process is: after portable terminal entered communication process, portable terminal needed continuous inspection whether to satisfy the entry condition of base station shifting; If satisfy entry condition, then according to the frequency meter that presets, and be field intensity or the signal to noise ratio or the error rate according to the signal quality that the order of preferred base station begins the comparison neighbor base station, judge whether to satisfy switching condition; If satisfy switching condition then base station shifting immediately; Otherwise not satisfying switching condition then still converses on original base station.
2. a kind of normal mode according to claim 1 realizes that down portable terminal strides the base station continual method of conversing, it is characterized in that: the entry condition of described base station shifting adopts portable terminal to detect current talking base station signal quality as Rule of judgment, when if current talking base station signal quality is lower than the threshold value of portable terminal setting, then start the scanning neighboring base station functions, when satisfying switching condition, the portable terminal base station shifting.
3. a kind of normal mode according to claim 2 realizes that down portable terminal strides the base station continual method of conversing, it is characterized in that: satisfying under the entry condition of described base station shifting, portable terminal is according to the frequency meter that presets, and be field intensity or the signal to noise ratio or the error rate according to the signal quality that the order of preferred base station begins the comparison neighbor base station, judge whether to satisfy switching condition.
4. a kind of portable terminal of realizing under normal mode according to claim 3 is striden the base station continual method of conversing, and it is characterized in that: described switching condition adopts one of following several modes:
1) relative signal quality: each signal of base station quality of portable terminal continuous monitoring, when the signal quality of certain adjacent base station surpasses current base station, just initiate to switch;
2) the relative signal quality of thresholding is arranged: each signal of base station quality of portable terminal continuous monitoring, when the signal quality of certain adjacent base station surpasses current base station, and the signal quality of current base station initiates to switch when being lower than a certain thresholding;
3) the relative signal quality of hysteresis is arranged: each signal of base station quality of portable terminal continuous monitoring, when the signal quality of certain adjacent base station surpasses hysteresis scope of current base station signal quality, just initiate to switch;
4) have and lag behind and the relative signal quality of thresholding: each signal of base station quality of portable terminal continuous monitoring, when the signal quality of certain adjacent base station surpasses hysteresis scope of current base station, and when the signal quality of current base station is lower than some thresholdings, just initiate to switch;
5) the relative signal quality of lag time is arranged: each signal of base station quality of portable terminal continuous monitoring, when the signal quality of certain adjacent base station signal quality height than current base station, and in period of time hereafter, all keep signal quality height than current base station, this moment just to begin to switch.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105847081A (en) * | 2016-03-18 | 2016-08-10 | 哈尔滨海能达科技有限公司 | Signal quality detection method and mobile terminal |
| CN105959944A (en) * | 2016-07-13 | 2016-09-21 | 成都中航信虹科技股份有限公司 | Distributed same-frequency simulcast signal transmission device and system |
| CN106211147A (en) * | 2016-07-13 | 2016-12-07 | 成都中航信虹科技股份有限公司 | A kind of distributed common-frequency simulcasting method for transmitting signals |
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| CN101415253A (en) * | 2008-12-04 | 2009-04-22 | 哈尔滨侨航通信设备有限公司 | Method for implementing mobile terminal uninterrupted talking between base stations in cluster system |
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| CN1481096A (en) * | 2002-09-05 | 2004-03-10 | 深圳市中兴通迅股份有限公司上海第二 | Method for switching between CDMA2000 system and wireless local area network system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105847081A (en) * | 2016-03-18 | 2016-08-10 | 哈尔滨海能达科技有限公司 | Signal quality detection method and mobile terminal |
| CN105959944A (en) * | 2016-07-13 | 2016-09-21 | 成都中航信虹科技股份有限公司 | Distributed same-frequency simulcast signal transmission device and system |
| CN106211147A (en) * | 2016-07-13 | 2016-12-07 | 成都中航信虹科技股份有限公司 | A kind of distributed common-frequency simulcasting method for transmitting signals |
| CN105959944B (en) * | 2016-07-13 | 2020-07-07 | 成都中航信虹科技股份有限公司 | Distributed same-frequency simulcast signal transmission device and system |
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