CN103105613A - Method and device for signal source selection - Google Patents
Method and device for signal source selection Download PDFInfo
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- CN103105613A CN103105613A CN2011103520273A CN201110352027A CN103105613A CN 103105613 A CN103105613 A CN 103105613A CN 2011103520273 A CN2011103520273 A CN 2011103520273A CN 201110352027 A CN201110352027 A CN 201110352027A CN 103105613 A CN103105613 A CN 103105613A
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Abstract
The invention discloses a method and a device for signal source selection. The method comprises that when multiple channels of signal sources are accessed, whether an alarm exists in each channel of a signal source is detected; and according to an alarm detection result and preset configuration information, a current optimal signal source in the signal sources is determined. According to the method and the device, the effect that under the condition of access of the multiple channels of the signal sources, a user can select the optimal signal source for access so that integral performance of a system is improved and meanwhile user experience is improved.
Description
Technical field
The present invention relates to the communications field, in particular to a kind of method for selecting signal source and device.
Background technology
Development along with the epoch, location technology has been widely used in life, for the GPS that is most widely used (Global Positioning System is referred to as GPS), it be one by 24 satellite systems that satellite forms covering the whole world.This system can guarantee at any time, and on the earth, any point can observe 4 satellites simultaneously, can collect longitude and latitude and the height of this observation station to guarantee satellite, in order to realize the functions such as navigation, location, time service.GPS can also be applied to the time service calibrating frequency, electric power for example, post and telecommunications, the time synchronized of the networks such as communication, correct time award into, accurately frequency award into etc., usable range is wider in the synchronizing network engineering is used.
For gps signal, it is signal once in a kind of discrete, second.Existing of alarm to be detected immediately when alarm occurring different from continuous signal, when gps signal occurs must just judging whether to exist alarm through one acknowledged alarm period when abnormal.The GPS interface is divided into two kinds on the physics model: a kind of is the gps antenna interface, and another kind is general pulse per second (PPS) (1 pulse per second is referred to as 1PPS)+Time of Day (Time of Day is referred to as TOD) interface, i.e. 1PPS+TOD interface.For antennal interface, it comes processing signals by a codec chip, and in the time of link occurs fault, chip can be kept and send the 1PPS signal, so just can not switch.And to general 1PPS+TOD interface, when detecting alarm, not only to detect 1PPS and whether exist extremely, also will detect the TOD message and whether exist extremely, so the condition that the judgement alarm exists has following three kinds of situation situations: (a) there is no 1PPS signal or 1PPS dropout; (b) the 1PPS signal is arranged, but in the TOD message, the pulse per second (PPS) state shows that the 1PPS signal is unavailable; (c) the TOD message is arranged, but message does not contain temporal information.In existing apparatus, the above-mentioned alarm that detects can only realize the alarm report function, when link occurs fault, there is no corresponding safeguard measure.
In actual networking was used, the locating device that exists in prior art (for example, the GPS locating device) generally only accessed a signal source (for example, gps signal source), but in order to realize defencive function, the application scenarios of two signal sources of access is arranged also.When a plurality of signal source of access, can't differentiate the quality of each road signal source, therefore often can the poor signal source of cut-in quality.
Summary of the invention
For during a plurality of signal source, differentiating the quality of each road signal source when access in correlation technique, the problem of therefore often can cut-in quality poor signal source the invention provides a kind of method for selecting signal source and device, to address the above problem at least.
According to an aspect of the present invention, provide a kind of method for selecting signal source, having comprised: when having the multipath signal source access, detected every road signal source and whether have alarm; Determine the signal source of current optimum in signal source according to alarm detection result and predetermined configurations information.
According to a further aspect in the invention, provide a kind of signal source selection device, having comprised: detection module is used for detecting the described signal source in every road and whether having alarm when having the multipath signal source access; Determination module is used for determining according to alarm detection result and predetermined configurations information the signal source of the current optimum of described signal source.
By the present invention; adopt the warning information of the multipath signal source that detects access; and determine the method for the signal source of current optimum in signal source according to alarm detection result and predetermined configurations information; solved in correlation technique when a plurality of signal source of access; can't differentiate the quality of each road signal source; therefore often understand the problem of the poor signal source of cut-in quality; and then the user can be made in the situation that optimum signal source is selected in the multipath signal source access; promote the overall performance of system, also improved user's experience simultaneously.
Description of drawings
Accompanying drawing described herein is used to provide a further understanding of the present invention, consists of the application's a part, and illustrative examples of the present invention and explanation thereof are used for explaining the present invention, do not consist of improper restriction of the present invention.In the accompanying drawings:
Fig. 1 is the process flow diagram according to the method for selecting signal source of the embodiment of the present invention;
Fig. 2 is the process flow diagram of method for selecting signal source according to the preferred embodiment of the invention;
Fig. 3 is the structured flowchart according to the signal source selection device of the embodiment of the present invention;
Fig. 4 is the structured flowchart according to the signal source selection device of the preferred embodiment of the present invention one;
Fig. 5 is the structured flowchart according to the signal source selection device of the preferred embodiment of the present invention two.
Embodiment
Hereinafter also describe in conjunction with the embodiments the present invention in detail with reference to accompanying drawing.Need to prove, in the situation that do not conflict, embodiment and the feature in embodiment in the application can make up mutually.
Fig. 1 is the process flow diagram according to the method for selecting signal source of the embodiment of the present invention, and as shown in Figure 1, this method for selecting signal source comprises the following steps:
Step S102 when having the multipath signal source access, detects every road signal source and whether has alarm;
Step S104 determines the signal source of the current optimum in signal source according to alarm detection result and predetermined configurations information.
Pass through the present embodiment; adopt the warning information of the multipath signal source that detects access; and determine the method for the signal source of the current optimum in signal source according to alarm detection result and predetermined configurations information; solved in correlation technique when a plurality of signal source of access; can't differentiate the quality of each road signal source; therefore often understand the problem of the poor signal source of cut-in quality; and then the user can be made in the situation that the signal source of current optimum is selected in the multipath signal source access; promote the overall performance of system, also improved user's experience simultaneously.
In the above-described embodiments, above-mentioned predetermined configurations information can comprise: the selection mode of signal source and the priority of signal source, wherein, this selection mode can also comprise: artificial selection mode and unartificial selection mode (also can be called automatic selection mode).In implementation process, the artificial selection mode can be that signal source is selected in manual intervention, and unartificial selection mode can be the automatic selecting signal source, and in the process that arranges, the priority of artificial selection mode can be higher than unartificial selection.Selection mode by signal source is provided and the priority of signal source can make the selectivity more flexibly that has of system, and the user experiences and also can increase thereupon.
Preferably, when the selection mode was artificial selection mode, step S104 can comprise following processing:
(1) response user's signal source selection instruction is determined the signal source that need to select in signal source;
When there is not alarm in the signal source of (2) selecting when needs, determine that the signal source that needs to select is the signal source of current optimum.
In implementation process, if having alarm in the artificial signal source of selecting, the signal source that the user reselects does not have alarm can be pointed out by system, and the mode of prompting can be can be also to show by image by sound.In the process that the user reselects, repeat the process of above-mentioned selection and alarm, until the user chooses the signal source that there is no alarm.In implementation process, can be also that the signal source that has alarm is just got rid of by system in the initial process of selecting, when the user selects, can choose at random, as long as the signal source of choosing is all the signal source that there is no alarm.The setting of artificial selection mode can make the user select arbitrarily signal source, has increased the maintainability of synchronizing network, facilitates the user to carry out intervention operation.
Preferably, when the selection mode was unartificial selection mode (namely automatically selecting), step S104 may further include following processing:
(1) according to the priority of signal source to not existing the signal source of alarm to sort in signal source;
(2) determine the signal source of the current optimum in signal source according to ranking results.
In implementation process, second-rate because the alarm detection result is shown as each road signal source that has alarm, so do not select this type of signal source as the final reference signal source, each road signal source that does not have alarm is according to priority sorted.Can also can arrange by order from small to large with priority by descending arranged sequentially, no matter by which kind of mode arrange, all select the signal source of priority maximum as signal source is arranged most.The setting of unartificial selection mode; in the time can't selecting, system can be for its signal source of selecting one road optimum as input as the user, goes wrong or when link breaks down at current access signal; can effectively protect and switch, make system more intelligent.
In preferred implementation process, above-mentioned predetermined configurations information can also comprise: the confirmation time that alarm generation and alarm disappear, wherein, detecting before whether every road signal source exist alarm, and can further include following processing:
(1) a plurality of ports for receiving signal source of configuration;
(2) selection mode of the priority in signalization source, acknowledging time and signal source.
For example, above-mentioned port can be the 1PPS+TOD interface.In preferred implementation process, whether detecting every road signal source, to exist alarm to comprise one of following:
(1) if the 1PPS signal of one or more signal source of signal source does not exist, determine that there is alarm in this one or more signal source;
(2) if in the TOD message of one or more signal source of signal source, the pulse per second (PPS) state shows that the 1PPS signal that exists is unavailable, determine that there is alarm in this one or more signal source;
(3) if the TOD message that exists in one or more signal source of signal source does not contain temporal information, determine that there is alarm in this one or more signal source.
In preferred implementation process, above-mentioned signal source can be the most widely used gps signal source.The below is above-mentioned preferred implementation take gps signal the most commonly used source as example further describes.
Fig. 2 is the process flow diagram of method for selecting signal source according to the preferred embodiment of the invention.As shown in Figure 2, this method for selecting signal source comprises following processing:
Step S202, the port of GP configuring S signal source.
Wherein, configure a plurality of GPS port access GPS reference sources, this GPS port refers to the 1PPS+TOD interface.If expectation equipment has a plurality of 1PPS+TOD port access GPS reference sources, each port arrangement is got final product for the input of permission signal.
Step S204, configuration parameter.
Wherein, the parameter of configuration mainly comprises priority, alarm generation and alarm disappearance acknowledging time and source selection mode.
Preferably, the priority of every road gps signal is set, this priority is the sign that identifies every road clock source.Priority is generally to sort according to certain rule, in implementation procedure, sorts according to positive integer is descending, and numeral is less represents that priority is higher.
Preferably, alarm generation and alarm disappearance acknowledging time are set, wherein, this acknowledging time is take second as unit, in order to the generation of avoiding the error detection alarm and a period of time of disappearance.Because the discreteness of TOD message, so to the detection of alarm, an acknowledging time need to be arranged.
Preferably, the source selection mode is set, wherein, this selection mode mainly comprises artificial selection mode and unartificial selection mode (selection mode automatically), and the priority that the artificial selection mode can be set will be higher than automatic selection mode.
Step S206, query warning.Whether exist the alarm poll to detect to every road access signal or port, and carry out alarming processing.In implementation process, it is one of following that the condition that the judgement alarm exists comprises:
(1) do not have 1PPS or 1PPS to lose;
(2) 1PPS is arranged, but in the TOD message, the pulse per second (PPS) state shows that 1PPS is unavailable;
(3) the TOD message is arranged, but message does not contain temporal information.
Step S208 selects the gps signal source.The testing result of step S206 is foundation, arranges according to the user simultaneously, and the quality of all signal sources is sorted, and selects one tunnel Optimal Signals.
Wherein, if carry out the selection of GPS reference source in the mode of artificial participation selection, in the situation that alarm do not detected, select the gps signal of appointment to input as the source, and the search of termination signal source list;
If carry out the selection of GPS input source in the mode of automatic selection, according to whether existing the height of alarm and priority to sort, if there is alarm, select scarcely this road signal as the final reference source, if there is no alarm, relatively there is not the priority of the reference source of alarm in each road, and the line ordering of going forward side by side is selected the signal source of one road optimum as input according to ranking results.
After executing above-mentioned steps, enter new alarm implementation next time, namely can repeated execution of steps S206 to S208, thus can again select according to current actual conditions the signal source of current optimum.
Fig. 3 is the structured flowchart according to the signal source selection device of the embodiment of the present invention.As shown in Figure 3, this signal source selection device comprises:
In above-mentioned signal source selection device, the signal source that determination module 20 is determined the current optimum in signal source according to alarm detection result and the predetermined configurations information of detection module 10, and then the user can be made in the situation that the signal source of current optimum is selected in the multipath signal source access, promote the overall performance of system, also improved user's experience simultaneously.
Preferably, as shown in Figure 4 and Figure 5, above-mentioned signal source selection device can also comprise:
Preferably, as shown in Figure 4, above-mentioned determination module 20 may further include:
The first determining unit 202 is used for when the selection mode of signal source is artificial selection mode, and response user's signal source selection instruction is determined the signal source that need to select in signal source;
The second determining unit 204 is connected or is coupled with the first determining unit 202, is used for when there is not alarm in the signal source that needs are selected, determines that the signal source that needs to select is the signal source of current optimum.
Preferably, as shown in Figure 5, determination module 20 may further include:
Sequencing unit 206 is used for when the selection mode of signal source is unartificial selection mode (selection mode automatically), according to the priority of signal source to not existing the signal source of alarm to sort in signal source;
The 3rd determining unit 208 is connected or is coupled with sequencing unit 206, is used for determining according to ranking results the signal source of the current optimum of signal source.
Signal source selection device shown in Figure 4 is a kind of preferred signal source selection device, and when the selection mode of signal source was artificial selection mode, this device can be determined according to user's intervention the signal source of current optimum.Signal source selection device shown in Figure 5 is another kind of preferred signal source selection device, when the selection mode of signal source was unartificial selection mode (selection mode automatically), this device can not exist according to the priority size signal source of alarm to determine the signal source of current optimum from signal source.
To sum up; by above-described embodiment provided by the invention; by providing method that manual intervention selects signal source and by the method to the setting of the detection of alarm and priority; accomplish to select the conduct input of one road optimum from multipath signal source; when in the situation that signal source breaks down also can protect switches, effectively avoided the interruption in gps clock or time synchronized path.
obviously, those skilled in the art should be understood that, above-mentioned each module of the present invention or each step can realize with general calculation element, they can concentrate on single calculation element, perhaps be distributed on the network that a plurality of calculation elements form, alternatively, they can be realized with the executable program code of calculation element, thereby, they can be stored in memory storage and be carried out by calculation element, and in some cases, can carry out step shown or that describe with the order that is different from herein, perhaps they are made into respectively each integrated circuit modules, perhaps a plurality of modules in them or step being made into the single integrated circuit module realizes.Like this, the present invention is not restricted to any specific hardware and software combination.
The above is only the preferred embodiments of the present invention, is not limited to the present invention, and for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (12)
1. a method for selecting signal source, is characterized in that, comprising:
When having the multipath signal source access, detect the described signal source in every road and whether have alarm;
Determine the signal source of current optimum in described signal source according to alarm detection result and predetermined configurations information.
2. method according to claim 1, is characterized in that, described predetermined configurations information comprises: the selection mode of described signal source and the priority of described signal source, wherein, described selection mode comprises: artificial selection mode and unartificial selection mode.
3. method according to claim 2, is characterized in that, when described selection mode is artificial selection mode, determines that according to alarm detection result and predetermined configurations information the signal source of the current optimum in described signal source comprises:
Response user's signal source selection instruction is determined the signal source that need to select in described signal source;
When there is not alarm in the described signal source that need to select, determine that the described signal source that needs to select is the signal source of described current optimum.
4. method according to claim 2, is characterized in that, when described selection mode is unartificial selection mode, determines that according to alarm detection result and predetermined configurations information the signal source of the current optimum in described signal source comprises:
According to the priority of described signal source to not existing the signal source of alarm to sort in described signal source;
Determine the signal source of the current optimum in described signal source according to ranking results.
5. method according to claim 2, is characterized in that, described predetermined configurations information also comprises: the confirmation time that alarm generation and alarm disappear, before whether the described signal source in the every road of detection exists alarm, also comprise:
Configure a plurality of ports be used to receiving described signal source;
The selection mode of the priority of described signal source, described acknowledging time and described signal source is set.
6. method according to claim 5, is characterized in that, described port is the 1PPS+TOD interface.
7. method according to claim 6, is characterized in that, whether detecting the described signal source in every road, to exist alarm to comprise one of following:
If the 1PPS signal of one or more signal source of described signal source does not exist, determine that there is alarm in this one or more signal source;
If in the TOD message of one or more signal source of described signal source, the pulse per second (PPS) state shows that the 1PPS signal that exists is unavailable, determine that there is alarm in this one or more signal source;
If the TOD message that exists in one or more signal source of described signal source does not contain temporal information, determine that there is alarm in this one or more signal source.
8. the described method of any one according to claim 1 to 7, is characterized in that, described signal source is the gps signal source.
9. a signal source selection device, is characterized in that, comprising:
Detection module is used for detecting the described signal source in every road and whether having alarm when having the multipath signal source access;
Determination module is used for determining according to alarm detection result and predetermined configurations information the signal source of the current optimum of described signal source.
10. device according to claim 9, is characterized in that, described signal source selection device also comprises:
Configuration module is used for configuring a plurality of ports be used to receiving described signal source;
Module is set, is used for described predetermined configurations information is set, wherein, described predetermined configurations information comprises: the confirmation time that the priority of signal source, alarm generation and alarm disappear and the selection mode of signal source.
11. device according to claim 10 is characterized in that, described determination module comprises:
The first determining unit is used for when the selection mode of described signal source is artificial selection mode, and response user's signal source selection instruction is determined the signal source that need to select in described signal source;
The second determining unit is used for determining that the described signal source that needs to select is the signal source of described current optimum when there is not alarm in the described signal source that need to select.
12. device according to claim 10 is characterized in that, described determination module comprises:
Sequencing unit is used for when the selection mode of described signal source is unartificial selection mode, according to the priority of described signal source to not existing the signal source of alarm to sort in described signal source;
The 3rd determining unit is for determine the signal source of the current optimum of described signal source according to ranking results.
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| CN111818384A (en) * | 2020-06-30 | 2020-10-23 | 北京市地铁运营有限公司地铁运营技术研发中心 | Display screen control method, control device, control system and computer-readable storage medium for rail transit |
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