CN102271370B - Base station equipment and channel unit switching method - Google Patents
Base station equipment and channel unit switching method Download PDFInfo
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- CN102271370B CN102271370B CN201110252536.9A CN201110252536A CN102271370B CN 102271370 B CN102271370 B CN 102271370B CN 201110252536 A CN201110252536 A CN 201110252536A CN 102271370 B CN102271370 B CN 102271370B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
- H04W88/08—Access point devices
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/06—Reselecting a communication resource in the serving access point
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Abstract
The embodiment of the invention provides base station equipment and a channel unit switching method, wherein the base station equipment includes a first channel unit which is used for generating a modulation signal at a frequency f1 and for outputting the modulation signal to a radio frequency control chain, a second channel unit which is used for receiving a first control signal sent by a base station controller, and the radio frequency control chain, wherein the first control signal is used for controlling a work frequency of the second channel unit to be f1, for generating a modulation signal at a frequency f1 and for outputting the modulation signal to the radio frequency control chain; and the radio frequency control chain is used for outputting the modulation signal at the frequency f1 generated by the first channel unit to the first inlet of a chamber combiner, and for outputting the modulation signal at the frequency f1 generated by the second channel unit to the first inlet of the chamber combiner, wherein frequency points supported by a filter in the chamber combiner which is connected with the first inlet include the f1. Due to application of the technical scheme provided by the embodiment of the invention, communication between the base station and a mobile station is not interrupted when the channel unit goes wrong.
Description
Technical field
The present invention relates to wireless communication technology field, particularly a kind of base station equipment and channel unit switching method.
Background technology
In existing trunked communication system, as shown in Figure 1, base station comprises: base station controller, channel device, mixer and antenna etc.The modulation signal that a plurality of channel devices send closes behind road by mixer, from antenna transmission, goes out, and as shown in Figure 1, the modulation signal that channel device 1, channel device 2, channel device 3, channel device 4 send closes Lu Houcong antenna by mixer and sends.For channel device quantity, surpass the group system of 4, the general some cavity combiner frequently that adopts, point frequently cavity combiner comprises a plurality of filters, the corresponding frequency of each filter, for a filter, only have the signal of a frequency to pass through, this just needs the operating frequency of each channel device in trunked communication system corresponding one by one with the frequency that each filter is supported respectively, as shown in Figure 1, the operating frequency of channel device 1 is identical with the frequency that filter 1 is supported, the operating frequency of channel device 2 is identical with the frequency that filter 2 is supported.
General, in a trunked communication system, only has a control channel, can there be a plurality of Traffic Channels, this control channel can be the operating frequency of channel device 1, also can be the operating frequency of channel device 2, can be also the operating frequency of other channel devices, and control channel is for bearer control signalling, such as, needed control information etc. is called out in the foundation between the public information that send to all travelling carriages base station, base station and travelling carriage.Traffic Channel is for carrying the business datum between base station and travelling carriage, such as speech data or Media Stream etc.
When certain channel device fault, if the operating frequency that control channel is this channel device, control channel just need to be switched on one other channel machine, if the operating frequency that certain Traffic Channel is this channel device, this Traffic Channel just need to be switched on one other channel machine, such as, channel device 1 fault, control channel or Traffic Channel just need to be switched on channel device 2, now change the frequency of control channel or Traffic Channel, from the operating frequency of original channel device 1, become the operating frequency of channel device 2.
Prior art has following shortcoming:
During due to certain channel device fault, need to change the frequency of control channel or Traffic Channel, if change the frequency of control channel, travelling carriage need to break from original network, again search network, then re-register registration, cause within a period of time that control channel switches, can not proper communication between base station and travelling carriage; If change the frequency of Traffic Channel, cause the business datum that Traffic Channel is carried to interrupt, also can interrupt communicating by letter between base station and travelling carriage.
Summary of the invention
The embodiment of the present invention provides a kind of base station equipment and channel unit switching method, in the time of can making channel device fault, does not interrupt communicating by letter between base station and travelling carriage.
In view of this, the embodiment of the present invention provides:
, comprising: radio frequency control link, the first channel device and second channel machine,
The first channel device is f for generated frequency
1modulation signal and output to radio frequency control link;
Second channel machine, the first control signal sending for receiving base station controller, described the first control signal is that work duration that base station controller monitors the first channel device fault or the first channel device sends while reaching predetermined work duration, and described the first control signal is f for controlling the operating frequency of second channel machine
1; According to described the first control signal, generated frequency is f
1modulation signal and output to radio frequency control link;
Radio frequency control link is f for the frequency that the first channel device is generated
1modulation signal output to the first entrance of cavity combiner; The frequency that second channel machine is generated is f
1modulation signal output to the first entrance of cavity combiner; The frequency of the filter support in the cavity combiner that wherein, described the first entrance connects comprises f
1.
, comprising:
The first channel device generated frequency is f
1modulation signal and output to radio frequency control link; The frequency that radio frequency control link generates the first channel device is f
1modulation signal output to the first entrance of cavity combiner; The frequency of the filter support in the cavity combiner that described the first entrance connects comprises f
1;
Second channel machine receives the first control signal that base station controller sends, described the first control signal is that work duration that base station controller monitors the first channel device fault or the first channel device sends while reaching predetermined work duration, and described the first control signal is f for controlling the operating frequency of second channel machine
1; According to described the first control signal, generated frequency is f
1modulation signal and output to radio frequency control link; The frequency that described radio frequency control link generates second channel machine is f
1modulation signal output to the first entrance of cavity combiner.
In the embodiment of the present invention, second channel machine is the operating frequency f of the first channel device receiving for controlling the operating frequency of second channel machine
1the first control signal after, generated frequency is f
1modulation signal and output to radio frequency control link, the frequency that radio frequency control link generates second channel machine is f
1modulation signal output to the first entrance of cavity combiner, like this, if the first channel device breaks down, second channel machine generated frequency is f
1modulation signal and output to the first entrance of cavity combiner, now the frequency of control channel or Traffic Channel does not just need to change, the communication between base station and travelling carriage just can not interrupted like this.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme of the embodiment of the present invention, to the accompanying drawing of required use in embodiment be briefly described below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the base station equipment structure figure that prior art provides;
Fig. 2 is a kind of base station equipment structure figure that the embodiment of the present invention provides;
Fig. 3 is the another kind of base station equipment structure figure that the embodiment of the present invention provides;
Fig. 4 is the first channel device that the embodiment of the present invention provides inner connection diagram of base station equipment while not breaking down;
Fig. 5 is the inner connection diagram of base station equipment after the first channel device that the embodiment of the present invention provides breaks down;
Fig. 6 is the base station equipment structure figure of a kind of double-channel machine backup that provides of the embodiment of the present invention;
Fig. 7 is the base station equipment structure figure of a kind of multichannel machine backup that provides of the embodiment of the present invention;
Fig. 8 is the another kind of base station equipment structure figure that the embodiment of the present invention provides
Fig. 9 is the PDT system construction drawing that the embodiment of the present invention provides;
Figure 10 is the channel unit switching method flow chart that the embodiment of the present invention provides;
Figure 11 is the another kind of channel unit switching method flow chart that the embodiment of the present invention provides.
Embodiment
Consult Fig. 2, the embodiment of the present invention provides a kind of base station equipment, and it comprises: the first channel device 01, second channel machine 02 and radio frequency control link 05, wherein,
The first channel device 01 is f for generated frequency
1modulation signal and output to radio frequency control link 05;
Wherein, it can be that base station controller monitors the first channel device cisco unity malfunction that base station controller monitors the first channel device fault, or base station controller monitors the communication disruption of the first channel device and base station controller, thinks the first channel device fault.Wherein, the work duration that base station controller monitors the first channel device sends the first control signal and is applicable to the scene that the first channel device and second channel wheel change jobs while reaching predetermined work duration, such as the first channel device continuous operation quit work after 12 hours, by second channel machine, worked.Wherein, base station controller can be integrated in base station equipment, also can be independent of base station equipment, does not affect realization of the present invention.
Optionally, the original operating frequency of second channel machine can be f
2, second channel machine after receiving the first control signal that base station controller sends, by operating frequency from f
2be switched to f
1, can make like this frequency of control channel or Traffic Channel not change, also remain f
1.Or second channel machine did not generate modulation signal before receiving the first control signal, after receiving the first control signal, generated frequency is f
1modulation signal.
Radio frequency control link 05 is f for the frequency that the first channel device 01 is generated
1modulation signal output to the first entrance of cavity combiner 07; The frequency that second channel machine 02 is generated is f
1modulation signal output to the first entrance of cavity combiner 07; Wherein, cavity combiner 07 at least comprises: the first filter 071 being connected with the first entrance of cavity combiner 07, and, the second filter 072 being connected with the second entrance of cavity combiner 07, the frequency that this first filter 071 is supported comprises f
1, do not comprise f
2, the frequency that this second filter 072 is supported comprises f
2, do not comprise f
1.Wherein, radio frequency control link can be the radio frequency handoff links in subsequent embodiment, or radio frequency control link is the link that comprises splitter or mixer, specifically sees the detailed description of subsequent embodiment.
In the embodiment of the present invention, second channel machine is the operating frequency f of the first channel device receiving for controlling the operating frequency of second channel machine
1the first control signal after, generated frequency is f
1modulation signal and output to radio frequency control link, the frequency that radio frequency control link generates second channel machine is f
1modulation signal output to the first entrance of cavity combiner, like this, if the first channel device breaks down, second channel machine generated frequency is f
1modulation signal and output to the first entrance of cavity combiner, now the frequency of control channel or Traffic Channel does not just need to change, the communication between base station and travelling carriage just can not interrupted like this.
In order to make technique scheme clearer, follow-up each embodiment will be described in detail technique scheme.
Consult Fig. 3, the embodiment of the present invention provides a kind of base station equipment, and it comprises: the first channel device 10, second channel machine 20 and radio frequency handoff links 50, wherein, the operating frequency of the first channel device 10 is f
1, the operating frequency of second channel machine 20 is f
2;
The first channel device 10 is f for generated frequency
1modulation signal and output to radio frequency handoff links;
Second channel machine 20, the first control signal sending for receiving base station controller, described the first control signal switches to f for controlling the operating frequency of second channel machine
1; Before receiving the first control signal of base station controller transmission, generated frequency is f
2modulation signal and output to radio frequency handoff links; After receiving the first control signal that base station controller sends, according to described the first control signal, by operating frequency from f
2be switched to f
1, generated frequency is f
1modulation signal and output to radio frequency handoff links;
Radio frequency handoff links 50, for receiving from the modulation signal of the first channel device with from the modulation signal of second channel machine, receive the second control signal that base station controller sends, described the second control signal switches to the modulation signal from second channel machine for the signal of controlling radio frequency handoff links and sending to the first entrance of cavity combiner from the modulation signal from the first channel device, before receiving the second control signal, (frequency that the first channel device generates is f to the first entrance of cavity combiner (label 70 of take in figure illustrates), to send modulation signal from the first channel device
1modulation signal), after receiving the second control signal, stop sending the modulation signal from the first channel device to the first entrance of cavity combiner, the first entrance by the modulation signal from second channel machine to cavity combiner sends, and now the modulation signal from second channel machine is that the frequency that second channel machine generates is f
2modulation signal, wherein, the filter in the cavity combiner 70 that described the first entrance connects is the first filter 71, the frequency of its support comprises f
1, do not comprise f
2, the filter in the cavity combiner that described the second entrance connects is the second filter 72 in Fig. 3, the frequency of its support comprises f
2, do not comprise f
1.
Receive the first control signal of base station controller transmission at second channel machine 20 before, the operating frequency f of this second channel machine 20
2can corresponding a Traffic Channel, i.e. the operating frequency f of this second channel machine 20
2for bearer service data, such as speech data or Media Stream etc., at base station controller 60, monitor the first channel device fault after second channel machine 20 sends the first control signal, this second channel machine changes operating frequency, becomes control channel.Like this, before can making the first channel device fault, second channel machine is born the transmission of some business datums, share the business data transmission pressure of other channel devices, when the first channel device fault, again can be timely as control channel, like this, travelling carriage just need to not break the new search network of laying equal stress on from original network, the base station of having avoided control channel to switch causing and the communication disruption between travelling carriage.
Wherein, this base station equipment also comprises: base station controller 60, in one embodiment, this base station controller is monitored the first channel device, sends described the first control signal and the second control signal when monitoring the first channel device fault.In another embodiment, this base station controller, for monitoring the work duration of the first channel device, sends described the first control signal and the second control signal when the work duration of the first channel device reaches predetermined work duration.
In the embodiment of the present invention, second channel machine is receiving the operating frequency f that switches to the first channel device for controlling the operating frequency of second channel machine
1the first control signal after, by operating frequency from f
2be switched to f
1, generated frequency is f
1modulation signal and output to radio frequency handoff links; After receiving the second control signal, by the modulation signal from second channel machine, the first entrance to cavity combiner sends radio frequency handoff links, like this, if the first channel device breaks down, the operating frequency of second channel machine switching oneself is the operating frequency of the first channel device, radio frequency handoff links sends to the modulation signal generating after second channel machine switch operating frequency the first entrance of cavity combiner, when the operating frequency of control channel is above-mentioned f
1time, for travelling carriage, the frequency of its control channel does not change, thus travelling carriage search network again, the base station of so just having avoided control channel to switch causing and the communication disruption between travelling carriage.
In order to make the present invention's technical scheme providing embodiment illustrated in fig. 3 clearer, following Fig. 4 and embodiment illustrated in fig. 5 being described in detail technique scheme:
Fig. 4 and Fig. 5 show a kind of base station equipment structure figure that the embodiment of the present invention provides, it comprises: the first channel device 100, second channel machine 200, radio frequency handoff links 500, base station controller 600 and cavity combiner 700, in this embodiment, suppose that the frequency that control channel is corresponding is f
1; Wherein, radio frequency handoff links 500 comprises: control unit 501, the first radio-frequency relay 502 and the second radio-frequency relay 503.Wherein, the difference of Fig. 4 and Fig. 5 is, the first radio-frequency relay 502 is different with the connected mode of the second radio-frequency relay 503.When Fig. 4 shows the first channel device 100 and does not break down, the connected mode of the first radio-frequency relay 502 and the second radio-frequency relay 503, after Fig. 5 shows the first channel device 100 and breaks down, the connected mode of the first radio-frequency relay 502 and the second radio-frequency relay 503.Wherein, this control unit 501 can be a single-chip microcomputer.
When the first channel device 100 does not break down, the first channel device 100 generated frequencies are f
1modulation signal and output to radio frequency handoff links; Second channel machine 200 generated frequencies are f
2modulation signal and output to radio frequency handoff links.
Radio frequency handoff links 500 comprises: control unit 501, the first radio-frequency relay 502 and the second radio-frequency relay 503, and described the first radio-frequency relay 502 comprises: the first delivery outlet 5022 being electrically connected to the first entrance of cavity combiner, the second delivery outlet 5023 being electrically connected to the second entrance of cavity combiner and the input port 5021 being electrically connected to the delivery outlet of the first channel device; Described the second radio-frequency relay 502 comprises: the 3rd delivery outlet 5032 being electrically connected to the second entrance of cavity combiner, the 4th delivery outlet 5033 being electrically connected to the first entrance of cavity combiner and the input port 5031 being electrically connected to the delivery outlet of second channel machine.
When the first channel device 100 does not break down, the input port 5021 of the first radio-frequency relay 502 is connected with the first delivery outlet 5022 of the first radio-frequency relay 502, (frequency that the first channel device 100 generates is f to the modulation signal of the first channel device 100 that now, the input port 5021 of the first radio-frequency relay 502 receives
1modulation signal) from this first delivery outlet 5022, output to the first entrance of cavity combiner 700.The input port 5031 of the second radio-frequency relay is connected with the 3rd delivery outlet 5032 of the second radio-frequency relay, and now, the modulation signal of the second channel machine 200 that the input port 5031 of the second radio-frequency relay receives (is that the frequency that second channel machine 100 generates is f
2modulation signal) from the 3rd delivery outlet 5032, output to the second entrance of cavity combiner 700.Wherein, the filter in the cavity combiner 700 that the first entrance of cavity combiner 700 connects is the first filter 701, and the filter in the cavity combiner 700 that the second entrance of cavity combiner 700 connects is the second filter 702.The filtering bandwidth of the first filter 701 comprises frequency f
1, do not comprise frequency f
2, the filtering bandwidth of the second filter 702 comprises frequency f
2, do not comprise frequency f
1.
Base station controller 60 monitoring the first channel devices 100, when monitoring the first channel device 100 fault, send the first control signal to second channel machine 200, concrete, can send the first control signal by RS485 or CAN bus.This first control signal switches to f for controlling the operating frequency of second channel machine
1, concrete, the first control signal comprises: the label of the target frequency that second channel machine is to be switched, i.e. frequency f
1label, make second channel machine obtain frequency f according to this label
1, and send the second control signal to radio frequency handoff links 50, in this embodiment, the second control signal is a digital signal, this second control signal switches to the modulation signal from second channel machine for the signal of controlling radio frequency handoff links and sending to the first entrance of cavity combiner from the modulation signal from the first channel device, and control the signal that radio frequency handoff links sends to the second entrance of cavity combiner and switch to the modulation signal from the first channel device from the modulation signal from second channel machine, controlling radio frequency handoff links is connected the input port of the second radio-frequency relay 5031 input port 5031 that changes the second radio-frequency relay into and is connected with the 4th delivery outlet 5033 with the 3rd delivery outlet 5032, controlling radio frequency handoff links is connected the input port of the first radio-frequency relay 5021 input port 5021 that changes the first radio-frequency relay into and is connected with the second delivery outlet 5023 with the first delivery outlet 5022, concrete, the second control signal can be value " 1 ", the control unit 501 in follow-up radio frequency handoff links 500 is received after this " 1 ", can control the second radio-frequency relay and switch accordingly.
Second channel machine 200 (is frequency f according to the label of the to be switched target frequency of second channel machine after receiving above-mentioned the first control signal
1label), obtain frequency f
1, by the operating frequency of oneself from f
2be switched to f
1, generated frequency is f
1modulation signal and output to radio frequency handoff links 500.
In the embodiment of the present invention during the first channel device fault, the operating frequency of second channel machine switching oneself is the operating frequency of the first channel device, and radio frequency handoff links sends to the modulation signal generating after second channel machine switch operating frequency the first entrance of cavity combiner.For travelling carriage, the frequency of its control channel does not change, and due to base station controller monitor after the first channel device fault to second channel machine send the first control signal and to the time that radio frequency handoff links sends the second control signal be all ms level, and the radio frequency link hardware exchange time less than 20.0ms, the base station of having avoided control channel to switch causing and communication disruption between travelling carriage.
Further, the base station equipment that this embodiment provides can also be carried out channel device switching after the first channel device 100 fault restoration, recovers the first channel device and the original operating state of second channel machine, concrete:
Base station controller 60 monitors after the first channel device 100 fault restoration, to second channel machine 200, sends the 3rd control signal, concrete, can send the first control signal by RS485 or CAN bus.The 3rd control signal switches to f for controlling the operating frequency of second channel machine
2, concrete, the 3rd control signal comprises: the label of the target frequency that second channel machine is to be switched, i.e. frequency f
2label, make second channel machine obtain frequency f according to this label
2, and send the 4th control signal to radio frequency handoff links 50, the 4th control signal switches to the modulation signal from the first channel device for the signal of controlling radio frequency handoff links and sending to the first entrance of cavity combiner from the modulation signal from second channel machine, and control the signal that radio frequency handoff links sends to the second entrance of cavity combiner and switch to the modulation signal from second channel machine from the modulation signal from the first channel device, controlling radio frequency handoff links is connected the input port of the second radio-frequency relay 5031 input port 5031 that changes the second radio-frequency relay into and is connected with the 3rd delivery outlet 5032 with the 4th delivery outlet 5033, controlling radio frequency handoff links is connected the input port of the first radio-frequency relay 5021 input port 5021 that changes the first radio-frequency relay into and is connected with the first delivery outlet 5022 with the second delivery outlet 5023, concrete, the second control signal can be value " 0 ", the control unit 501 in follow-up radio frequency handoff links 500 is received after this " 0 ", can control the second radio-frequency relay and switch accordingly.
After second channel machine 200 receives above-mentioned the 3rd control signal, by the operating frequency of oneself from f
1be switched to f
2, generated frequency is f
2modulation signal and output to radio frequency handoff links 500.
It should be noted that, in radio frequency handoff links 500, also can not comprise control unit 501, as shown in Figure 6, base station controller is directly controlled the first relay 502 and the second relay 503 with Transistor-Transistor Logic level, such as base station controller is when monitoring the first channel device 100 fault, to the first radio-frequency relay 502 and the second radio-frequency relay 503, send the second control signal, this second control signal is high level, the first radio-frequency relay 502 is connected input port 5021 and changes input port 5021 into and be connected with the second delivery outlet 5023 under the control of high level with the first delivery outlet 5022, now, the delivery outlet of exporting the modulation signal of the first channel device 100 on the first radio-frequency relay 502 is switched to described the second delivery outlet 5023 from described the first delivery outlet 5022, the second radio-frequency relay 503 is connected input port 5031 and changes input port 5031 into and be connected with the 4th delivery outlet 5023 under the control of high level with the 3rd delivery outlet 5022, now, the delivery outlet of exporting the modulation signal of second channel machine 200 on the second radio-frequency relay 503 is just switched to described the 4th delivery outlet 5033 from described the 3rd delivery outlet 5032.Or, the second control signal comprises the first Transistor-Transistor Logic level and the second Transistor-Transistor Logic level, be that base station controller sends the first Transistor-Transistor Logic level to the first radio-frequency relay 502, such as high level, the first radio-frequency relay 502 is connected input port 5021 and changes input port 5021 into and be connected with the second delivery outlet 5023 under the control of the first Transistor-Transistor Logic level with the first delivery outlet 5022; Base station controller sends the second Transistor-Transistor Logic level to the second radio-frequency relay 503, such as low level, the second radio-frequency relay 503 is connected input port 5031 and changes input port 5031 into and be connected with the 4th delivery outlet 5023 under the control of the second Transistor-Transistor Logic level with the 3rd delivery outlet 5022;
Follow-up, when base station controller is monitoring after the first channel device 100 fault restoration, to the first radio-frequency relay 502 and the second radio-frequency relay 503, send the 4th control signal, now, the 4th control signal is low level, the first radio-frequency relay 502 is connected input port 5021 and changes input port 5021 into and be connected with the first delivery outlet 5022 under low level control with the second delivery outlet 5023, now, the delivery outlet of exporting the modulation signal of the first channel device 100 on the first radio-frequency relay 502 is switched to described the first delivery outlet 5022 from described the second delivery outlet 5023; The second radio-frequency relay 503 is connected input port 5031 and changes input port 5031 into and be connected with the 3rd delivery outlet 5032 under low level control with the 4th delivery outlet 5033, now, the delivery outlet of exporting the modulation signal of second channel machine 200 on the second radio-frequency relay 503 is just switched to described the 3rd delivery outlet 5032 from described the 4th delivery outlet 5033.Or, the 4th control signal comprises the 3rd Transistor-Transistor Logic level and the 4th Transistor-Transistor Logic level, being base station controller sends the 3rd Transistor-Transistor Logic levels to the first radio-frequency relay 502, and the first radio-frequency relay 502 is connected input port 5021 and changes input port 5021 into and be connected with the first delivery outlet 5022 under the control of the 3rd Transistor-Transistor Logic level with the second delivery outlet 5023; Base station controller sends the 4th Transistor-Transistor Logic levels to the second radio-frequency relay 503, and the second radio-frequency relay 503 is connected input port 5031 and changes input port 5031 into and be connected with the 3rd delivery outlet 5032 under the control of the 4th Transistor-Transistor Logic level with the 4th delivery outlet 5033.It should be noted that, after the first channel device 100 fault restoration, also can control manually input port 5021 on the first relay and be connected with the second delivery outlet 5023 and change input port 5021 into and be connected with the first delivery outlet 5022, the input port on the second relay 5031 is connected with the 4th delivery outlet 5033 and change input port 5031 into and be connected with the 3rd delivery outlet 5032.
It should be noted that, radio frequency handoff links also can not adopt radio-frequency relay, does not affect realization of the present invention.
It should be noted that, in the various embodiments described above of the present invention, second channel machine, when the first channel device does not break down, also can leave unused and not send modulation signal, does not affect realization of the present invention.
It should be noted that Fig. 4 and the operating frequency f with the first channel device embodiment illustrated in fig. 5
1the frequency corresponding for control channel is example, and while having described the first channel device fault, the operating frequency that second channel machine switches oneself is the operating frequency of the first channel device.In other embodiments, the operating frequency f of the first channel device
1also can be frequency corresponding to certain Traffic Channel, when the first channel device fault, the operating frequency that second channel machine switches oneself be the operating frequency of the first channel device of fault, continues to utilize this frequency transmission service signal.
It should be noted that, in the various embodiments described above of the present invention, for primary channel device (being above-mentioned the first channel device), only configured an alternate channel machine (being second channel machine), in other embodiments, also can configure a plurality of alternate channel machines, accordingly, configure a plurality of radio-frequency relays, each radio-frequency relay has a plurality of delivery outlets, does not affect realization of the present invention.Fig. 7 shows three channel devices schematic diagram of backup mutually, and the first channel device, second channel machine and the 3rd channel device backup each other, and wherein, the operating frequency of the first channel device is f
1, the frequency that its filter connecting for the first entrance of cavity combiner (i.e. the first filter) is supported, the operating frequency of second channel machine is f
2, the frequency that its filter connecting for the second entrance of cavity combiner (i.e. the second filter) is supported, the operating frequency of the 3rd channel device is f
3, the frequency that its filter connecting for the 3rd entrance of cavity combiner (i.e. the 3rd filter) is supported.
Fig. 8 shows another base station equipment that the embodiment of the present invention provides, it comprises: the first channel device 901, second channel machine 902, the first splitter 903, the second splitter 904, the first mixer 905 and the second mixer 906, also base station equipment can also comprise cavity combiner 907 and base station controller 908, wherein, cavity combiner 907 comprises filter 1 and filter 2 9072.Wherein, splitter and mixer can adopt power divider and branch line coupler.
Wherein, it is identical that the function of the first channel device 901, second channel machine 902, cavity combiner 907 and base station controller 908 is described with the various embodiments described above, do not repeat them here.
Wherein, the input port of the first splitter 903 is electrically connected to the delivery outlet of the first channel device 901, two delivery outlets of the first splitter 903 are electrically connected to an input port of the first mixer 905 and the second mixer 906 respectively, and two delivery outlets of the second splitter 904 are electrically connected to another input port of the first mixer 905 and the second mixer 906 respectively; The delivery outlet of the first mixer 905 is electrically connected to the first entrance of cavity combiner 907; The delivery outlet of the second mixer 906 is electrically connected to the second entrance of cavity combiner 907.
In the embodiment of the present invention, the first splitter 903 is divided into two-way by the modulation signal of the first channel device 901 outputs, be transferred to respectively the first mixer 905 and the second mixer 906, the second splitter 904 is divided into two-way by the modulation signal of second channel machine 902 outputs, be transferred to respectively the first mixer 905 and the second mixer 906, like this, the first mixer 905 just outputs to the synthetic road of modulation signal of the modulation signal of the first channel device 901 outputs and 902 outputs of second channel machine the first entrance of cavity combiner 907, the frequency that the filter one connecting due to the first entrance of cavity combiner 907 is supported comprises f
1, do not comprise f
2so, even if filter one receives frequency, be f
1and f
2modulation signal, this filter one can only be also f by frequency
1signal output to antenna, by frequency, be f
2target signal filter.In like manner, the second mixer 906 just outputs to the synthetic road of modulation signal of the modulation signal of the first channel device 901 output and 902 outputs of second channel machine the second entrance of cavity combiner 907, and the frequency that the filter two connecting due to the second entrance of cavity combiner 907 is supported comprises f
2, do not comprise f
1so, even if filter two receives frequency, be f
1and f
2modulation signal, this filter two can only be also f by frequency
2signal output to antenna, by frequency, be f
1target signal filter.Due to when the first channel device 901 fault, the operating frequency of second channel machine is switched to f
1so, guaranteed that the first entrance transmission frequency to cavity combiner 907 that the first mixer 901 can continue is f
1modulation signal, when the operating frequency of control channel is above-mentioned f
1time, for travelling carriage, the frequency of its control channel does not change, thus travelling carriage search network again, the base station of so just having avoided control channel to switch causing and the communication disruption between travelling carriage.
Fig. 9 has illustrated police Digital Clustering (the Police Digital Trunking that uses technical solution of the present invention, PDT) system, it comprises: backboard 800, two base station controllers (base station controller 1 and base station controller 2), label is respectively 801 and 802, two Switching Power Supplies (Switching Power Supply 1 and Switching Power Supply 2), label is respectively 803 and 804, fan unit 805, 4 channel devices (are channel device 1, channel device 2, channel device 3 and channel device 4), label is respectively 806, 807, 808, 809, and cavity combiner 810, splitter 811, wherein, radio frequency control link is integrated in cavity combiner 810, the wherein 26S Proteasome Structure and Function of radio frequency control link and above-mentioned Fig. 3, Fig. 4, Fig. 5, Fig. 6, 26S Proteasome Structure and Function shown in Fig. 7 or Fig. 8 is similar, do not repeat them here.
Consult Figure 10, the embodiment of the present invention provides a kind of channel unit switching method, and the method is applicable to the base station equipment that the various embodiments described above provide, and the method mainly comprises:
1001, the first channel device generated frequency is f
1modulation signal and output to radio frequency control link; The frequency that radio frequency control link generates the first channel device is f
1modulation signal output to the first entrance of cavity combiner; The frequency of the filter support in the cavity combiner that described the first entrance connects comprises f
1.
Wherein, the radio frequency control link in the embodiment of the present invention can be the radio frequency handoff links in above-described embodiment, can be also the link that comprises splitter and mixer, does not affect realization of the present invention.
1002, second channel machine receives the first control signal that base station controller sends, and described the first control signal is f for controlling the operating frequency of second channel machine
1; Second channel machine is according to described the first control signal, and generated frequency is f
1modulation signal and output to radio frequency control link; The frequency that described radio frequency control link generates second channel machine is f
1modulation signal output to the first entrance of cavity combiner.
Wherein, before this step, described radio frequency control link receives the second control signal from base station controller, and described the second control signal switches to the modulation signal from second channel machine for the signal of controlling radio frequency control link and sending to the first entrance of cavity combiner from the modulation signal from the first channel device.Wherein, this first control signal and the second control signal are sent when base station controller monitors the first channel device fault; Or this first control signal and the second control signal are that the work duration that monitors the first channel device at base station controller sends while reaching predetermined work duration.
In the embodiment of the present invention, second channel machine is the operating frequency f of the first channel device receiving for controlling the operating frequency of second channel machine
1the first control signal after, generated frequency is f
1modulation signal and output to radio frequency control link, the frequency that radio frequency control link generates second channel machine is f
1modulation signal output to the first entrance of cavity combiner, like this, if the first channel device breaks down, second channel machine generated frequency is f
1modulation signal and output to the first entrance of cavity combiner, now the frequency of control channel or Traffic Channel does not just need to change, the communication between base station and travelling carriage just can not interrupted like this.
In order to make technique scheme provided by the invention clearer, following embodiment is described in detail technique scheme:
1101, the first channel device generated frequency is f
1modulation signal and output to radio frequency handoff links; Radio frequency handoff links is f by the frequency of the generation from the first channel device
1modulation signal to the first entrance of cavity combiner, send; The frequency of the filter support in the cavity combiner that described the first entrance connects comprises f
1, do not comprise f
2.
1102, base station controller monitors the first channel device fault, sends the first control signal described in the first control signal switch to f for controlling the operating frequency of second channel machine to second channel machine
1; To radio frequency handoff links, send the second control signal, described the second control signal switches to the modulation signal from second channel machine for the signal of controlling radio frequency handoff links and sending to the first entrance of cavity combiner from the modulation signal from the first channel device.
Optionally, above-mentioned the first control signal and the second control signal are that work duration that base station controller monitors the first channel device sends while reaching predetermined work duration, this scheme is applicable to the first channel device and second channel wheel changes jobs, such as the first channel device continuous operation was worked by second channel machine after 12 hours, in the continuous operation of second channel machine, after 12 hours, turn again by the first channel device and work.
1103, second channel machine receives the first control signal that base station controller sends, according to this first control signal, by operating frequency from f
2be switched to f
1, generated frequency is f
1modulation signal and output to radio frequency handoff links.
Wherein, before this step, the method also comprises: second channel machine generated frequency is f
2modulation signal and output to radio frequency handoff links; Radio frequency handoff links, before receiving the second control signal, (is that the frequency that second channel machine generates is f by the modulation signal from second channel machine
2modulation signal) to the second entrance of cavity combiner, send, the frequency of the filter support in the cavity combiner that described the second entrance connects comprises f
2, do not comprise f
1.
1104, radio frequency handoff links receives the second control signal that base station controller sends, stopping sending the modulation signal from the first channel device to the first entrance of cavity combiner, (is that the frequency that second channel machine generates is f by the modulation signal from second channel machine
2modulation signal) to the first entrance of cavity combiner, send.
Wherein, step 1103 and step 1104 do not have the sequencing in sequential, can carry out simultaneously.Wherein, the radio frequency handoff links in this embodiment can adopt the radio frequency handoff links in above-mentioned Fig. 3, Fig. 4, Fig. 5, Fig. 6, Fig. 7.
Wherein, the method also comprises:
1105, after base station controller monitors the first channel device fault restoration, to second channel machine, send the 3rd control signal, the 3rd control signal switches to f for controlling the operating frequency of second channel machine
2; To radio frequency handoff links, send the 4th control signal, the 4th control signal switches to the modulation signal from the first channel device for the signal of controlling radio frequency handoff links and sending to the first entrance of cavity combiner from the modulation signal from second channel machine.
1106, second channel machine is according to the 3rd control signal, by operating frequency from f
1be switched to f
2, generated frequency is f
2modulation signal and output to radio frequency handoff links.
1107, radio frequency handoff links receives the 4th control signal that base station controller sends, stop sending the modulation signal from second channel machine to the first entrance of cavity combiner, by the modulation signal from the first channel device, (frequency that the first channel device generates is f
1modulation signal) to the first entrance of cavity combiner, send.
Wherein, step 1106 and step 1107 do not have the sequencing in sequential, can carry out simultaneously.
Optionally, above-mentioned the 3rd control signal and the 4th control signal are that work duration that base station controller monitors second channel machine sends while reaching predetermined work duration.
In the embodiment of the present invention, second channel machine is receiving the operating frequency f that switches to the first channel device for controlling the operating frequency of second channel machine
1the first control signal after, by operating frequency from f
2be switched to f
1, generated frequency is f
1modulation signal and output to radio frequency handoff links; After receiving the second control signal, by the modulation signal from second channel machine, the first entrance to cavity combiner sends radio frequency handoff links, like this, if the first channel device breaks down, the operating frequency of second channel machine switching oneself is the operating frequency of the first channel device, radio frequency handoff links sends to the modulation signal generating after second channel machine switch operating frequency the first entrance of cavity combiner, when the operating frequency of control channel is above-mentioned f
1time, for travelling carriage, the frequency of its control channel does not change, thus travelling carriage search network again, the base station of so just having avoided control channel to switch causing and the communication disruption between travelling carriage.
One of ordinary skill in the art will appreciate that all or part of step realizing in above-described embodiment method is to come the hardware that instruction is relevant to complete by program, described program can be stored in a kind of computer-readable recording medium, read-only memory for example, disk or CD etc.
The base station equipment and the channel unit switching method that above the embodiment of the present invention are provided are described in detail, applied specific case herein principle of the present invention and execution mode are set forth, the explanation of above embodiment is just for helping to understand method of the present invention and core concept thereof; , for one of ordinary skill in the art, according to thought of the present invention, all will change in specific embodiments and applications, in sum, this description should not be construed as limitation of the present invention meanwhile.
Claims (10)
1. a base station equipment, is characterized in that, comprising: radio frequency control link, the first channel device and second channel machine,
The first channel device is f for generated frequency
1modulation signal and output to radio frequency control link;
Second channel machine, the first control signal sending for receiving base station controller, described the first control signal is that work duration that base station controller monitors the first channel device fault or the first channel device sends while reaching predetermined work duration, and described the first control signal is f for controlling the operating frequency of second channel machine
1; According to described the first control signal, generated frequency is f
1modulation signal and output to radio frequency control link;
Radio frequency control link is f for the frequency that the first channel device is generated
1modulation signal output to the first entrance of cavity combiner; When receiving the second control signal of base station controller transmission, the frequency that second channel machine is generated is f
1modulation signal output to the first entrance of cavity combiner; The frequency of the filter support in the cavity combiner that wherein, described the first entrance connects comprises f
1, described the second control signal switches to the modulation signal from second channel machine for the signal of controlling radio frequency control link and sending to the first entrance of cavity combiner from the modulation signal from the first channel device.
2. base station equipment according to claim 1, is characterized in that,
Described second channel machine, also, for before receiving the first control signal of base station controller transmission, generated frequency is f
2modulation signal and output to radio frequency control link;
Described radio frequency control link, for receiving the second control signal from base station controller, described the second control signal is that work duration that base station controller monitors the first channel device fault or the first channel device sends while reaching predetermined work duration; Before receiving the second control signal, to the first entrance of cavity combiner, sending the frequency that the first channel device generates is f
1modulation signal, to the second entrance of cavity combiner, sending the frequency that second channel machine generates is f
2modulation signal; After receiving the second control signal, to the first entrance of cavity combiner, sending the frequency that second channel machine generates is f
1modulation signal, wherein, the frequency of the filter support in the cavity combiner that described the second entrance connects comprises f
2.
3. base station equipment according to claim 2, is characterized in that,
Described the second control signal also for, control the signal that radio frequency control link sends to the second entrance of cavity combiner and switch to the modulation signal from the first channel device from the modulation signal from second channel machine;
Described radio frequency control link comprises: the first radio-frequency relay and the second radio-frequency relay, described the first radio-frequency relay comprises: the first delivery outlet being electrically connected to the first entrance of cavity combiner, the second delivery outlet being electrically connected to the second entrance of cavity combiner, and the input port being electrically connected to the delivery outlet of the first channel device; Described the second radio-frequency relay comprises: the 3rd delivery outlet being electrically connected to the second entrance of cavity combiner, the 4th delivery outlet being electrically connected to the first entrance of cavity combiner, and the input port being electrically connected to the delivery outlet of second channel machine;
Under the control of the second control signal, the input port of the first radio-frequency relay is connected the input port that changes the first radio-frequency relay into and is connected with the second delivery outlet with the first delivery outlet, the input port of the second radio-frequency relay is connected the input port that changes the second radio-frequency relay into and is connected with the 4th delivery outlet with the 3rd delivery outlet.
4. base station equipment according to claim 3, is characterized in that,
Described the second control signal is Transistor-Transistor Logic level.
5. base station equipment according to claim 3, is characterized in that,
Described the second control signal is digital signal;
Described radio frequency control link also comprises:
Control unit, for receiving after the second control signal that base station controller sends, according to described the second control signal, the input port of controlling the first radio-frequency relay is connected the input port that changes the first radio-frequency relay into and is connected with the second delivery outlet with the first delivery outlet; The input port of controlling the second radio-frequency relay is connected the input port that changes the second radio-frequency relay into and is connected with the 4th delivery outlet with the 3rd delivery outlet.
6. according to the base station equipment described in claim 2 to 5 any one, it is characterized in that,
Described base station equipment also comprises:
Base station controller for monitoring the first channel device, sends the first control signal to second channel machine when the work duration of the first channel device fault or the first channel device reaches predetermined work duration, to radio frequency control link, sends the second control signal.
7. base station equipment according to claim 1, is characterized in that,
Described radio frequency control link comprises: the first splitter, the second splitter, the first mixer and the second mixer, wherein,
The input port of the first splitter is electrically connected to the delivery outlet of the first channel device, two delivery outlets of the first splitter are electrically connected to an input port of the first mixer and the second mixer respectively, and two delivery outlets of the second splitter are electrically connected to another input port of the first mixer and the second mixer respectively; The delivery outlet of the first mixer is electrically connected to the first entrance of cavity combiner; The delivery outlet of the second mixer is electrically connected to the second entrance of cavity combiner.
8. according to the base station equipment described in claim 1 or 7, it is characterized in that,
Described base station equipment also comprises:
Base station controller for monitoring the first channel device, sends the first control signal to second channel machine when the work duration of the first channel device fault or the first channel device reaches predetermined work duration.
9. a channel unit switching method, is characterized in that, comprising:
The first channel device generated frequency is f
1modulation signal and output to radio frequency control link; The frequency that radio frequency control link generates the first channel device is f
1modulation signal output to the first entrance of cavity combiner; The frequency of the filter support in the cavity combiner that described the first entrance connects comprises f
1;
Second channel machine receives the first control signal that base station controller sends, described the first control signal is that work duration that base station controller monitors the first channel device fault or the first channel device sends while reaching predetermined work duration, and described the first control signal is f for controlling the operating frequency of second channel machine
1; According to described the first control signal, generated frequency is f
1modulation signal and output to radio frequency control link; When described radio frequency control link receives the second control signal of base station controller transmission, the frequency that described radio frequency control link generates second channel machine is f
1modulation signal output to the first entrance of cavity combiner, described the second control signal switches to the modulation signal from second channel machine for the signal of controlling radio frequency control link and sending to the first entrance of cavity combiner from the modulation signal from the first channel device.
10. method according to claim 9, is characterized in that:
Frequency second channel machine being generated in described radio frequency control link is f
1modulation signal output to the first entrance of cavity combiner before, the method also comprises:
Described radio frequency control link receives the second control signal from base station controller, and described the second control signal is that work duration that base station controller monitors the first channel device fault or the first channel device sends while reaching predetermined work duration.
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| CN201110252536.9A CN102271370B (en) | 2011-08-30 | 2011-08-30 | Base station equipment and channel unit switching method |
| PCT/CN2012/075751 WO2013029395A1 (en) | 2011-08-30 | 2012-05-18 | Base station apparatus and channel machine switching method |
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| CN102271370B (en) * | 2011-08-30 | 2014-02-12 | 海能达通信股份有限公司 | Base station equipment and channel unit switching method |
| CN102970704B (en) * | 2012-12-14 | 2015-12-23 | 大唐移动通信设备有限公司 | The method for supervising of radio jink failure, system and base station |
| CN104270833B (en) * | 2014-09-10 | 2018-01-09 | 哈尔滨海能达科技有限公司 | A kind of wireless communication system and its shunt |
| CN105259911A (en) * | 2015-07-22 | 2016-01-20 | 北京佰才邦技术有限公司 | Control method and system of movable carrier and control system of unmanned plane |
| CN105553994B (en) * | 2015-12-22 | 2018-12-11 | 通号通信信息集团上海有限公司 | A kind of digit wireless communication system and its application based on voice gateways |
| CN106937346A (en) * | 2015-12-30 | 2017-07-07 | 哈尔滨海能达科技有限公司 | PDT control channel machines shift process, base station and base station controller |
| DE102018102056A1 (en) * | 2018-01-30 | 2019-08-01 | Kathrein Se | RF combiner for a mobile site, RF combiner arrangement with two RF combiners for a mobile site and such a mobile site |
| CN111092672B (en) * | 2018-10-24 | 2022-04-29 | 成都鼎桥通信技术有限公司 | Channel selection method and device |
| CN111654921B (en) * | 2020-04-13 | 2022-05-17 | 广州维德科技有限公司 | Cluster base station communication method and cluster base station communication system |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0602213B1 (en) * | 1992-07-02 | 2000-01-12 | Motorola, Inc. | Multiple cavity tuning of a transmitter output in a communication system |
| CN1663300A (en) * | 2002-04-29 | 2005-08-31 | 诺基亚有限公司 | Handovers of user equipment connections in wireless communication systems |
| CN1757168A (en) * | 2002-12-30 | 2006-04-05 | Sk电信有限公社 | Method and system for switching over to 1X system upon 1XEV-DO system failure |
Family Cites Families (1)
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0602213B1 (en) * | 1992-07-02 | 2000-01-12 | Motorola, Inc. | Multiple cavity tuning of a transmitter output in a communication system |
| CN1663300A (en) * | 2002-04-29 | 2005-08-31 | 诺基亚有限公司 | Handovers of user equipment connections in wireless communication systems |
| CN1757168A (en) * | 2002-12-30 | 2006-04-05 | Sk电信有限公社 | Method and system for switching over to 1X system upon 1XEV-DO system failure |
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