CN102427385B - Backup WiFi light carrier wireless switching system - Google Patents
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- CN102427385B CN102427385B CN201110246712.8A CN201110246712A CN102427385B CN 102427385 B CN102427385 B CN 102427385B CN 201110246712 A CN201110246712 A CN 201110246712A CN 102427385 B CN102427385 B CN 102427385B
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Abstract
The invention discloses a backup WiFi light carrier wireless switching system. The system comprises: a near-end unit; a far-end node, which is connected with the near-end unit through an optical fiber link; and an active antenna, which is electrically connected with the far-end node. The near-end unit consists of a controller, a main access point, a backup access point, an RF switch, a transmit-receive separating unit and a first photoelectric/electric-photo conversion unit. The far-end unit includes: a second photoelectric/ electric-photo conversion unit, which is electrically connected with the first photoelectric/ electric-photo conversion unit of the near-end unit through the optical fiber link; a power amplifier; a low noise amplifier; and a duplexer, which is simultaneously connected with the power amplifier and the low noise amplifier as well as is connected with the active antenna; besides, the power amplifier and the low noise amplifier are simultaneously connected with the second photoelectric/ electric-photo conversion unit. The controller controls the RF switch to be communicated with the main access point and be disconnected with the backup access point, so that the WiFi radio-frequency signal of the main access point can be transmitted to the far-end node through the optical fiber link.
Description
[technical field]
The present invention relates to wireless communication field, relate in particular to a kind of radio exchange system, relate more specifically to a kind of backup WiFi light carrier wireless switching system.
[background technology]
By light-carried wireless technology, that is, by Optical Fiber Transmission WiFi radiofrequency signal, can realize the scope that WiFi radiofrequency signal is covered to 200 meters～5000m by optical fiber wired mode.While is because WiFi access point concentrates on central control room, and the simplification of distant-end node functional unit, makes access control, certification and the management of WiFi all concentrate on control centre, has effectively improved reliability, fail safe and the flexibility of system.
WiFi access point in long-play process, inevitably there will be deadlock, equipment cannot access of radio network etc. problem.Once go wrong, do not found in time simultaneously, can have a strong impact on user's network service quality.Need to find in time to have the access point of fault for this reason, and make corresponding processing.But, in the prior art, not yet effectively discovery mechanism and the soon technology of quick-recovery access point normal operating conditions at present.In other words, existing WiFi light-carried wireless switching system cannot effectively address the above problem.
Therefore, be necessary to provide a kind of improved WiFi light-carried wireless switching system, thereby can overcome the drawback existing in above-mentioned prior art.
[summary of the invention]
The object of the present invention is to provide a kind of can be without the backup WiFi light carrier wireless switching system that interruptedly maintains access point normal operating conditions.
For realizing this object, the present invention adopts following technical scheme:
A kind of backup WiFi light carrier wireless switching system, comprising: near-end unit (100);
The distant-end node (110) being connected with near-end unit (100) by optical fiber link (107); And
Radiating antenna (115) with described distant-end node (110) electric connection.
Described near-end unit (100) comprises controller (101), main access point (102), backup access point (103), radio-frequency (RF) switch (104), transmitting-receiving separative element (105) and the first photoelectricity/electrooptic switching element (106).
Described distant-end node (110) comprises the second photoelectricity/electrooptic switching element (111) being electrically connected by above-mentioned optical fiber link (107) and the first photoelectricity/electrooptic switching element (106) of described near-end unit (100), the power amplifier (113) being connected with described the second photoelectricity/electrooptic switching element (111) and low noise amplifier (112) and the duplexer (114) being connected with described power amplifier (113) and low noise amplifier (112) simultaneously simultaneously, described duplexer (114) is connected with described radiating antenna (115).
Described controller (101) is arranged to control described radio-frequency (RF) switch (104) and is connected main access point (102), disconnect backup access point (103) simultaneously, thereby make the WiFi radiofrequency signal of main access point (102) be transferred to described distant-end node (110) by described optical fiber link (107), and then provide wireless network signal to cover; Described controller is arranged to read operational data and the state of main access point (102) simultaneously, in the time main access point (102) operation irregularity being detected, output control command, control radio-frequency (RF) switch (104) and connect backup access point (103), disconnect main access point (102), thereby make the WiFi radiofrequency signal that backs up access point (103) be transferred to distant-end node (110) by optical fiber link (107), replace main access point (102), and then provide wireless network signal covering with seamless way.
Compared with prior art, the present invention possesses following advantage:
Due in WiFi light-carried wireless switching system, access point is backed up, main access point and backup access point that performances and parameters is identical in WiFi light-carried wireless switching system, are adopted in other words, therefore, once one of them access point (such as main access point) breaks down, WiFi light-carried wireless switching system can switch to signal another access point (such as backup access point), thereby effectively maintain the normal operation of access point, so guarantee user network use can not interrupt.
[brief description of the drawings]
Fig. 1 is the system principle diagram of backup WiFi light carrier wireless switching system according to an embodiment of the invention;
Fig. 1 a is the theory diagram of the controller 101 of backup WiFi light carrier wireless switching system shown in Fig. 1;
Fig. 2 is the theory diagram of the radio-frequency (RF) switch 104 of backup WiFi light carrier wireless switching system shown in Fig. 1;
Fig. 3 is the theory diagram of the transmitting-receiving separative element 105 of backup WiFi light carrier wireless switching system shown in Fig. 1;
Fig. 4 is the theory diagram of the duplexer of backup WiFi light carrier wireless switching system shown in Fig. 1;
Fig. 5 has shown the operation block diagram of backup WiFi light carrier wireless switching system shown in Fig. 1-4.
[embodiment]
Generally, the invention provides a kind of WiFi light-carried wireless switching system that has adopted two access points, or be referred to as backup WiFi light carrier wireless switching system.Specifically, in this system, main access point and backup access point that performances and parameters is identical have been adopted.In the time that main access point breaks down, WiFi light-carried wireless switching system can switch to signal backup access point, thereby guarantee that the network signal that offers user can not interrupt, and then effectively maintain the normal operation of access point, finally provide stable wireless network signal to cover.
Below in conjunction with drawings and Examples, the present invention is further illustrated:
With reference to figure 1, according to one embodiment of present invention, a kind of backup WiFi light carrier wireless switching system comprise near-end unit 100, the distant-end node 110 being connected with described near-end unit 100 by optical fiber link 107 and the radiating antenna 115 being electrically connected with described distant-end node 110.
Described near-end unit 100 comprises controller 101, main access point 102, backup access point 103, radio-frequency (RF) switch 104, transmitting-receiving separative element 105 and the first photoelectricity/electrooptic switching element 106.
Described distant-end node 110 comprises the second photoelectricity/electrooptic switching element 111 being electrically connected with the first photoelectricity/electrooptic switching element 106 of described near-end unit 100 by above-mentioned optical fiber link 107, the power amplifier 113 being connected with described the second photoelectricity/electrooptic switching element 111 and low noise amplifier 112 and the duplexer 114 being connected with described power amplifier 113 and low noise amplifier 112 simultaneously simultaneously.Described duplexer 114 is connected with described radiating antenna 115.
Under initial situation, described controller 101 is controlled radio-frequency (RF) switch 104 and is connected main access point 102, disconnect backup access point 103 simultaneously, thereby make the WiFi radiofrequency signal of main access point 102 be transferred to described distant-end node 110 by described optical fiber link 107, and then provide wireless network signal to cover.
Described controller 101 reads operational data and the state of main access point 102, in the time main access point 102 operation irregularity being detected, output control command, control radio-frequency (RF) switch 104 and connect backup access point 103, disconnect main access point 102, thereby make the WiFi radiofrequency signal that backs up access point 103 be transferred to distant-end node 110 by optical fiber link 107, replaced main access point 102, and then provide wireless network signal covering with seamless way.Because backup access point 103 has the parameters such as identical SSID (network name), authentication password, working channel, mode of operation with main access point 102, therefore the radio reception device of wireless coverage area can be connected on backup access point 103 automatically, and without the parameter that reconfigures radio reception device, thereby realize the automatic backup function of WiFi WAP (wireless access point).
Described the first photoelectricity/electrooptic switching element 106 is made up of electricity/optical conversion element 1062 and light/electric converting unit 1064, the descending analog radio-frequency signal that both have been respectively used to transmitting-receiving separative element 105 to export converts light signal to, is sent to distant-end node 110 by optical fiber link 107; And the light signal that distant-end node 110 is sent converts up analog radio-frequency signal to, export the upward signal input of transmitting-receiving separative element 105 to.
Preferably, with reference to figure 1a, described controller 101 comprises interconnected microprocessor 1012, built-in storage 1016, external memory 1011, network interface 1018 and input/output interface 1014.Described controller 101 is configured, obtains the operational data of main access point 102 and/or backup access point 103 to main access point 102 and backup access point 103 by network interface 1018; Controller 101 is controlled the on off state of radio-frequency (RF) switch 104 by input/output interface 1014, complete the switching between main access point 102 and backup access point 103.
Described main access point 102 has consistent function and parameter configuration with backup access point 103, and both provide wireless network access for WiFi radio signal source is provided.
Described radio-frequency (RF) switch 104 is electronics single-pole double-throw switch (SPDT), for the switching of analog radio-frequency signal, that is, and for switching signal between main access point 102 and backup access point 103.
Described transmitting-receiving separative element 105 for by the transmitting of WiFi radiofrequency signal (downstream signal) with receive signal (upward signal) and realize and separating, thereby realize signal transmitting and receiving duplex.
The the second photoelectricity/electrooptic switching element 111 of described distant-end node 110 has identical 26S Proteasome Structure and Function with the first photoelectricity/electrooptic switching element 106 of described near-end unit 100, and it comprises photoelectric conversion unit 1112 and electrooptic switching element 1114.It should be noted that: the electricity/optical conversion element 1062 in described the first photoelectricity/electrooptic switching element 106 is connected by one of them optical fiber link 107 with the light/electric converting unit 1112 in the second photoelectricity/electrooptic switching element 111; Light/electric converting unit 1064 in described the first photoelectricity/electrooptic switching element 106 is connected by another optical fiber link 107 with the electricity/optical conversion element 1114 in described the second photoelectricity/electrooptic switching element 111.
The low noise amplification of the analog radio-frequency signal (upward signal) that low noise amplifier 112 is received for achieving a butt joint, and be electrically connected with the electricity/optical conversion element 1114 of the second photoelectricity/electrooptic switching element 111.
Described power amplifier 113 is connected with the light/electric converting unit 1112 of the second photoelectricity/electrooptic switching element 111, for realizing the power amplification of analog radio-frequency signal (downstream signal) of transmitting.
Described duplexer 114, for realizing the transmission duplex of signal, is realized single antenna transmitting-receiving radiofrequency signal.
Described radiating antenna 115 is operated in 2.4GHz frequency range, for receiving and dispatching WiFi radio frequency signal.
In the time of system works, controller 101 sets the basic parameter of main access point 102 and backup access point 103, and main access point 102 and backup access point 103 have the configuration parameters such as identical SSID (network name), authentication password, working channel, mode of operation.
The IP address of the IP address of described network interface 1018 and main access point 102 and backup access point 103 is in the same network segment; Described input/output interface 1014, for output switch control signal, is controlled the on off state of radio-frequency (RF) switch 104.
In one embodiment of the invention, controller 101 adopts snmp protocol to obtain main access point 102 and backs up state and the parameter of access point 103, and the out of order access point that resets.In one embodiment of the invention, power amplifier (PA) 113 output radio-frequency power 100mW.In one embodiment of the invention, the multiplication factor of low noise amplifier (LNA) 112 is 30dB.The signal bandwidth of preferably, the light of above-mentioned first and second photoelectricity/electrooptic switching element/electric converting unit or electricity/optical conversion element is confined to any number between 1600MHz～2700MHz.The optical fiber of fiber port is monomode fiber.
Fig. 2 has shown the theory diagram of radio-frequency (RF) switch 104.As shown in the figure, described radio-frequency (RF) switch 104 comprises control interface 201, drive circuit 202 and four switching tube Q1, Q2, Q3, Q4.
Described control interface 201 is for receiving the control signal of controller 101; The control signal that described drive circuit 202 receives control interface 201 is processed, and then produces two reverse control signals, to control respectively the operating state of two groups of switching tube Q1, Q4 and Q2, Q3.
In addition, described radio-frequency (RF) switch 104 has four outer signal ports: control signal input Ct1, the first channel ChA, second channel ChB and output Cx.
Control signal input Ct1 connects the input/output interface 1014 of controller 101.Controller 101 is controlled the on off state of radio-frequency (RF) switch 104 by control signal input Ct1.
The first channel ChA, second channel ChB connect respectively main access point 102 and backup access point 103.
Output Cx connects transmitting-receiving separative element 105.
In the time that control signal input Ct1 state is " 1 " (high level), controller 101 drive circuits 202 produce control signal, make Q2, Q3 closure, Q1, Q4 disconnect, the first channel ChA is communicated with output Cx, and second channel ChB and output Cx disconnect, the radiofrequency signal of main access point 102 is transferred to distant-end node 110 by follow-up optical fiber link 107, thereby provides the WiFi wireless signal of far-end to cover;
In the time that control signal input Ct1 state is " 0 " (low level), controller 101 drive circuits 202 produce control signal, Q2, Q3 are disconnected, Q1, Q4 closure, second channel ChB is communicated with output Cx, and the first channel ChA and output Cx disconnect, the radiofrequency signal that now backs up access point 103 is transferred to distant-end node 110 by another follow-up optical fiber link 107, and then provides the WiFi wireless signal of far-end to cover.
In addition, no matter output Cx termination is led to the first channel ChA or second channel end ChB, and each channeling port mates the load that has 50 Europe.
Fig. 3 is the theory diagram of transmitting-receiving separative element 105.As shown in the figure, described transmitting-receiving separative element 105 comprises interconnected radio-frequency power detection circuit 301, shaping circuit 302, drive circuit 303 and 4 switching tube Q5, Q8, Q6 and Q7.In addition, described transmitting-receiving separative element 105 has input Cx1, upstream ends Rx1 and downstream end Tx1.
Described radio-frequency power detection circuit 301 is surveyed the transmitting power of input Cx1 and is produced detectable signal, and detectable signal is exported two reverse control signals after shaping circuit 302 and drive circuit 303, respectively the state of control switch pipe Q5, Q8 and Q6, Q7.
When the main access point 102 shown in Fig. 1 or backup access point 103 is not worked or input Cx1 end during in signal accepting state, drive circuit 303 is exported two reverse control signals, make switching tube Q6 and Q7 closure, Q5 and Q8 disconnect, and input Cx1 and upstream ends Rx1 connect;
In the time that input Cx1 end transmits (descending), the detectable signal that radio-frequency power detection circuit 301 is exported, through shaping circuit 302 and drive circuit 303, export two reverse control signals, make switching tube Q5 and Q8 closure, Q6 and Q7 disconnect, and input Cx1 end and downstream end Tx1 connect.
The physical circuit separating according to the transmitting-receiving shown in Fig. 3, can realize the function that transmitting-receiving separates.No matter input Cx1 connects transmitting terminal Tx1 or receiving terminal Rx1 simultaneously, and each port mates the load in 50 Europe.
Fig. 4 is the theory diagram of duplexer 114.As shown in the figure, described duplexer 114 is made up of radio-frequency power detection circuit 401, shaping circuit 402, drive circuit 403 and switching tube Q9, Q10, Q11, Q12.In addition, described duplexer 114 has transmitting terminal Tx2, receiving terminal Rx2 and common port Cx2.
Described radio-frequency power detection circuit 401 is surveyed transmitting power and the output ultra-weak electronic signal of transmitting Tx2.Described shaping circuit 402 for the ultra-weak electronic signal that radio-frequency power detection circuit 401 is exported amplify, shaping and filtering.Described drive circuit 403 is for the signal of amplification, shaping and filtering is again amplified and nursed one's health, thereby two reverse signals of output are controlled respectively conducting and the cut-off of Q9, Q12 and Q10, two groups of switching tubes of Q11.
When duplexer 114 is not worked, when transmitting terminal Tx2, receiving terminal Rx2 and common port Cx2 do not have signal to pass through, switching tube Q10 and Q11 closure, Q9 and Q12 disconnect, and common port Cx2 and receiving terminal Rx2 connect;
When receiving signal, i.e. when the common port Cx2 termination collection of letters, drive circuit 403 is exported two reverse control signals, makes switching tube Q10 and Q11 closure, and Q9 and Q12 disconnect, and common port Cx2 and receiving terminal Rx2 connect;
When transmitting, be that transmitting terminal Tx2 is while having descending (transmitting) signal, the detectable signal that radio-frequency power detection circuit 401 is exported, through shaping circuit 402 and drive circuit 403, export two reverse control signals, make switching tube Q9 and Q12 closure, Q10 and Q11 disconnect, and common port Cx2 and transmitting terminal Tx2 connect.
Conducting and cut-off that duplexer of the present invention 114 is crossed Q9, Q12 and Q10, two groups of switching tubes of Q11 realize common port Cx2 sending and receiving duplex, no matter switch connection transmitting terminal Tx2 or receiving terminal Rx2 simultaneously, and each port mates the load in 50 Europe.
Fig. 5 is the workflow diagram of above-mentioned backup WiFi light carrier wireless switching system.
When system initialization (step 801), the operating state of the main access point 102 of controller 101 initialization, backup access point 103 and radio-frequency (RF) switch 104, comprises the parameter setting (step 802) of each access point.
Next, described controller 101 starts to monitor the operating state of main access point 102, and particularly, whether normally described controller 101 judges the operation (step 803) of main access point 102.In the time finding that the operating state of main access point 102 is abnormal, output control signal, controls radio-frequency (RF) switch 104 and connects backup access points 103, is taken over the main access point 102 of fault by backup access point 103, provides the wireless signal of far-end to cover (step 805).
Then, whole flow process proceeds to step 806.In this step, controller 101 resets to out of order main access point 102, to attempt to repair main access point.After this in step 807, described controller 101 judges whether described main access point 102 is repaired successfully, if success is regarded the main access point 102 after repairing as backup access point, and record trouble event; If cannot repair fault success, described controller 101 sends failure alarm signal, record trouble event (step 808).
Described main access point 102 and backup access point 103 are two identical WiFi access points, are operated in 2.4GHz frequency range, 802.11b/g pattern.
Described radio-frequency (RF) switch 104 is semiconductor electronic switch, and under the control of controller 101, the WiFi radiofrequency signal that realizes main access point 102 and backup access point 103 is switched.
Described transmitting-receiving separative element 105, for transmit (downstream signal) of WiFi radiofrequency signal separated with reception signal (upward signal), is realized transmission duplex.
Described main access point 102, backup access point 103, radio-frequency (RF) switch 104, transmitting-receiving separative element 105, first, second photoelectricity/electrooptic switching element 106,111 and controller 101 are positioned at control centre, and control centre is connected by the optical fiber link 107 of 200～5000m with distant-end node.
Described controller 101 configures main access point 102 and backup access point 103 by network interface 1018, and obtains the operational data of each access point; Described controller 101 is controlled the on off state of radio-frequency (RF) switch 104 by input/output interface 1014, complete the switching of access point.
The running of part parts of the present invention is carried out to simplified summary below.
When system initialization, controller 101 sets the basic parameter of main access point 102 and backup access point 103, while switching for guarantee access point, the steady operation of network, the SSID (network name) of main access point 102 and backup access point 103, authentication password, working channel, mode of operation etc. arrange identical.
Controller 101 is controlled radio-frequency (RF) switch 104 and is connected main access point 102, disconnects backup access point 103, makes the WiFi radiofrequency signal of main access point 102 by optical fiber link, is transferred to distant-end node, and wireless coverage is provided.
Controller 101 reads operational data and the state of main access point 102, and in the time main access point 102 operation irregularity being detected, output control command, controls radio-frequency (RF) switch 104 and connect backup access point 103, disconnects main access point 102.The WiFi radiofrequency signal of backup access point 103 is transferred to distant-end node 110 by optical fiber link, and wireless coverage is provided.Because backup access point 103 has the parameters such as identical SSID (network name), authentication password, working channel, mode of operation with main access point 102, the radio reception device of wireless coverage area is connected on backup access point 103 automatically, without the setting that reconfigures radio reception device, thereby realize the automatic backup function of WiFi WAP (wireless access point).
In backup WiFi light carrier wireless switching system provided by the invention, main access point and backup access point that performances and parameters is identical are adopted.In the time that main access point breaks down, WiFi light-carried wireless switching system can switch to signal backup access point, thereby guarantee that the network signal that offers user can not interrupt, and then effectively maintain the normal operation of access point, finally provide stable wireless network signal to cover.
Therefore; embodiment is preferably execution mode of the present invention; but be not merely restricted to the described embodiments; other any do not deviate from change, the modification done under Spirit Essence of the present invention and principle, substitutes, combination, simplify; all should be equivalent substitute mode, within being all included in protection scope of the present invention.
Claims (9)
1. a backup WiFi light carrier wireless switching system, is characterized in that comprising:
Near-end unit (100);
The distant-end node (110) being connected with near-end unit (100) by optical fiber link (107); And
Radiating antenna (115) with described distant-end node (110) electric connection;
Described near-end unit (100) comprises controller (101), main access point (102), backup access point (103), radio-frequency (RF) switch (104), transmitting-receiving separative element (105) and the first photoelectricity/electrooptic switching element (106);
Described distant-end node (110) comprises the second photoelectricity/electrooptic switching element (111) being electrically connected by above-mentioned optical fiber link (107) and the first photoelectricity/electrooptic switching element (106) of described near-end unit (100), the power amplifier (113) being connected with described the second photoelectricity/electrooptic switching element (111) and low noise amplifier (112) and the duplexer (114) being connected with described power amplifier (113) and low noise amplifier (112) simultaneously simultaneously, described duplexer (114) is connected with described radiating antenna (115),
Described controller (101) is arranged to control described radio-frequency (RF) switch (104) and is connected main access point (102), disconnect backup access point (103) simultaneously, thereby make the WiFi radiofrequency signal of main access point (102) be transferred to described distant-end node (110) by described optical fiber link (107), and then provide wireless network signal to cover; Described controller is arranged to read operational data and the state of main access point (102) simultaneously, in the time main access point (102) operation irregularity being detected, output control command, control radio-frequency (RF) switch (104) and connect backup access point (103), disconnect main access point (102), thereby make the WiFi radiofrequency signal that backs up access point (103) be transferred to distant-end node (110) by optical fiber link (107), replace main access point (102), and then provide wireless network signal covering with seamless way;
And described radio-frequency (RF) switch (104) comprises control interface (201), drive circuit (202) and the first couple and second pair of switching tube by two switching tube compositions; Described control interface (201) is for receiving the control signal of controller (101); The control signal that described drive circuit (202) receives control interface (201) is processed, and then produces two reverse control signals, to control respectively the operating state of described two pairs of switching tubes; Described radio-frequency (RF) switch (104) has four outer signal ports: control signal input (Ctl), the first channel, second channel and output (Cx); Control signal input (Ctl) connects the input/output interface (1014) of controller (101), controller (101) is controlled the on off state of radio-frequency (RF) switch (104) by control signal input (Ctl), the first channel, second channel connect respectively main access point (102) and backup access point (103), and output (Cx) connects transmitting-receiving separative element (105).
2. backup WiFi light carrier wireless switching system according to claim 1, is characterized in that: described backup access point (103) has identical network name, authentication password, working channel and mode of operation with main access point (102).
3. backup WiFi light carrier wireless switching system according to claim 1, is characterized in that: described the first photoelectricity/electrooptic switching element (106) is made up of electricity/optical conversion element (1062) and light/electric converting unit (1064); Both have been respectively used to convert the descending analog radio-frequency signal of transmitting-receiving separative element (105) output to light signal, are sent to distant-end node (110) by optical fiber link (107); And the light signal that distant-end node (110) is sent converts up analog radio-frequency signal to, export the upward signal input of transmitting-receiving separative element (105) to.
4. backup WiFi light carrier wireless switching system according to claim 1, is characterized in that: described controller (101) comprises microprocessor (1012), built-in storage (1016), external memory (1011), network interface (1018) and input/output interface (1014); Described controller (101) is configured, obtains the operational data of main access point (102) and/or backup access point (103) to main access point (102) and backup access point (103) by network interface (1018); Described controller (101) is controlled the on off state of radio-frequency (RF) switch (104) by input/output interface (1014), complete the switching between main access point (102) and backup access point (103).
5. backup WiFi light carrier wireless switching system according to claim 3, is characterized in that: the second photoelectricity/electrooptic switching element (111) of described distant-end node (110) comprises light/electric converting unit (1112) and electricity/optical conversion element (1114); Electricity/optical conversion element (1062) in described the first photoelectricity/electrooptic switching element (106) is connected by one of them optical fiber link (107) with the light/electric converting unit (1112) in the second photoelectricity/electrooptic switching element (111); Light/electric converting unit (1064) in described the first photoelectricity/electrooptic switching element (106) is connected by another optical fiber link (107) with the electricity/optical conversion element (1114) in described the second photoelectricity/electrooptic switching element (111).
6. backup WiFi light carrier wireless switching system according to claim 5, is characterized in that: described low noise amplifier (112) is electrically connected with the electricity/optical conversion element (1114) of the second photoelectricity/electrooptic switching element (111); Described power amplifier (113) is connected with the light/electric converting unit (1112) of the second photoelectricity/electrooptic switching element (111).
7. backup WiFi light carrier wireless switching system according to claim 1, is characterized in that: described radio-frequency (RF) switch (104) is arranged to:
In the time that control signal input (Ctl) state is " 1 ", controller (101) drives the described drive circuit (202) of described radio-frequency (RF) switch (104) to produce control signal, make pair of switches pipe closure, and second pair of switching tube disconnects, the first channel is communicated with output (Cx), and second channel and output (Cx) disconnect, the radiofrequency signal of main access point (102) is transferred to distant-end node (110) by follow-up optical fiber link (107), thereby provides the WiFi wireless signal of far-end to cover;
In the time that control signal input (Ctl) state is " 0 ", controller (101) drives the described drive circuit (202) of described radio-frequency (RF) switch (104) to produce control signal, pair of switches pipe is disconnected, and second pair of switching tube closure, second channel is communicated with output (Cx), and the first channel and output (Cx) disconnect, the radiofrequency signal that now backs up access point (103) is transferred to distant-end node (110) by follow-up another optical fiber link (107), and then provides the WiFi wireless signal of far-end to cover.
8. backup WiFi light carrier wireless switching system according to claim 1, is characterized in that: described transmitting-receiving separative element (105) comprises radio-frequency power detection circuit (301), shaping circuit (302), drive circuit (303) and the 3rd pair and the 4th pair of switching tube by two switching tube compositions; Described transmitting-receiving separative element (105) has input (Cx1), upstream ends (Rx1) and downstream end (Tx1);
Described radio-frequency power detection circuit (301) is arranged to survey the transmitting power of input (Cx1) and produce detectable signal, detectable signal is exported two reverse control signals afterwards through shaping circuit (302) and drive circuit (303), controls respectively the state of the 3rd pair of switching tube and the 4th pair of switching tube;
Described drive circuit (303) is arranged to: when main access point (102) or backup access point (103) is not worked or input (Cx1) during in signal accepting state, two reverse control signals of drive circuit (303) output, make the 4th pair of switching tube closure, the 3rd pair of switching tube disconnects, and input (Cx1) and upstream ends (Rx1) are connected; In the time that input (Cx1) end transmits, the detectable signal of radio-frequency power detection circuit (301) output, through shaping circuit (302) and drive circuit (303), export two reverse control signals, make described the 3rd pair of switching tube closure, and described the 4th pair of switching tube disconnects, described input (Cx1) and downstream end (Tx1) are connected.
9. backup WiFi light carrier wireless switching system according to claim 1, is characterized in that: described duplexer (114) is made up of radio-frequency power detection circuit (401), shaping circuit (402), drive circuit (403) and the 5th pair of forming by two switching tubes and the 6th pair of switching tube; Described duplexer (114) has transmitting terminal (Tx2), receiving terminal (Rx2) and common port (Cx2);
Described radio-frequency power detection circuit (401) is arranged to survey transmitting power and the output ultra-weak electronic signal of transmitting terminal (Tx2);
Described shaping circuit (402) be arranged to the ultra-weak electronic signal of radio-frequency power detection circuit (401) output amplify, shaping and filtering;
Described drive circuit (403) is arranged to the signal of amplification, shaping and filtering again amplify and nurse one's health, thereby two reverse signals of output are controlled respectively conducting and the cut-off of the 5th, six pairs of switching tubes.
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