CN101754471A - Method and device for switching work modes of wireless local area network access device - Google Patents
Method and device for switching work modes of wireless local area network access device Download PDFInfo
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- CN101754471A CN101754471A CN200810218306A CN200810218306A CN101754471A CN 101754471 A CN101754471 A CN 101754471A CN 200810218306 A CN200810218306 A CN 200810218306A CN 200810218306 A CN200810218306 A CN 200810218306A CN 101754471 A CN101754471 A CN 101754471A
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- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
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Abstract
The invention discloses a method and a device for switching work modes of a wireless local area network access device. The method comprises the following steps: two or more different work modes of the wireless local area network access device are preset, and different work modes have different working performances and different power consumptions and are respectively applicable to different network states; and when a hardware button state is changed or a network state is changed, and if the switching condition of the work mode is satisfied, the work mode is switched to another work mode. The device comprises a preset module and a switching module, wherein the preset module is used for presetting the work modes of the access device, and the switching module is used for switching the work modes of the access device. On the premise that the network transmission requirements and the user requirements are satisfied, the access device stays at an energy-saving working state so as to integrally reduce the energy consumption of the access device.
Description
Technical field
The present invention relates to the wireless local area network technology field, particularly the WLAN devices energy-saving operation method.
Background technology
Environmental problem and energy problem are the major issues of world today's extensive concern.On the one hand, the finiteness of the energy requires us to save the use of the energy, and on the other hand, too much energy consumption can cause environmental problems such as greenhouse effect.Power saving is all more and more paid attention at industry-by-industry and field.And numerous industries with power saving as an important measurement index.The communications industry is no exception, and numerous communication equipment energy-savings also can be the energy-conservation significant contribution of making.Because a lot of communication equipments all run without interruption for a long time, if pay attention to power saving, get off for a long time, one saves a lot of energy surely.For terminal equipment, because enormous amount, so power saving is also especially crucial.Based on the wireless local area network technology of IEEE802.11 series of canonical is important and a kind of technology of being used widely in the home network interconnection technique.Energy-conservation for WLAN devices, IEEE802.11e has provided correlation technique, but these methods are all at wireless lan client equipment, as the mobile phone of band Wi-Fi function etc.Energy-saving application for wireless office net access point apparatus does not have ready-made method.Because the WLAN (wireless local area network) access device is extensive use of, study the highly significant energy-conservation of WLAN (wireless local area network) access device.The present invention has designed a kind of WLAN (wireless local area network) access device method for saving energy.
Summary of the invention
For solving the problems of the technologies described above, the present invention proposes a kind of method of work and operating mode switching device of WLAN (wireless local area network) access device, realize the different working modes of WLAN (wireless local area network) access device under the heterogeneous networks state, and can be according to the change of network state etc., free switching working mode, satisfy under the prerequisite of using thereby be implemented in, save the purpose of energy consumption.
For achieving the above object, the invention provides a kind of method of work of WLAN (wireless local area network) access device, the two or more different working modes of default WLAN (wireless local area network) access device, described different working modes has different service behaviours and different power consumptions, is applicable to different network states respectively; Described WLAN (wireless local area network) access device if satisfy the condition that mode of operation is switched, switches to another kind of mode of operation from a kind of mode of operation when change of hardware button state or network state change.
Above-mentioned different service behaviour comprises: the Beacon frame sends interval, signal transmitting power, signal transmitting and receiving passage.
Further, above-mentioned different mode of operation specifically comprises:
Normal mode, under the described normal mode, described WLAN (wireless local area network) access device beacon frame period is the shortest, and when sending data, all radio circuit power amplifier parts are operate as normal all;
Idle pulley, under the described idle pulley, described WLAN (wireless local area network) access device beacon frame period is the longest, and beacon frame transmitting power is minimum, does not have Data Receiving and transmission, and the radio circuit power amplifier partly has only a passage job, other pathway closures;
The low performance pattern, under the described low performance pattern, described WLAN (wireless local area network) access device beacon frame period is between described normal mode and described idle pulley, when data send, transmitting power is lower than described normal mode, and the radio circuit power amplifier partly has only the work of part passage;
" shut " mode", under the described " shut " mode", described WLAN (wireless local area network) access device circuit quits work, and does not receive and does not send any signal.
Further, the switching condition of above-mentioned mode of operation is as described below.
When satisfying one of following condition, described WLAN (wireless local area network) access device switches to described " shut " mode" from described normal mode or described low performance pattern or described idle pulley:
Described WLAN (wireless local area network) access device hardware switch button is changed to closes, or described WLAN (wireless local area network) access device sets in advance and regularly close, and regularly the shut-in time arrive, or described WLAN (wireless local area network) access device is idle surpasses the predefined time.
When satisfying one of following condition, described WLAN (wireless local area network) access device switches to normal mode from described " shut " mode":
Described WLAN (wireless local area network) access device powers on, or described WLAN (wireless local area network) access device resets.
When the WLAN (wireless local area network) access device is in described low performance pattern, if the transfer of data throughput surpasses data throughput maximum under the described low performance pattern, described WLAN (wireless local area network) access device from described low performance mode switch to normal mode.
When the WLAN (wireless local area network) access device was in described idle pulley, if the data of receiving, described WLAN (wireless local area network) access device switched to normal mode from described idle pulley.
When the WLAN (wireless local area network) access device is in described normal mode, if in setting-up time, does not receive constantly and send data, described WLAN (wireless local area network) access device switches to idle pulley from described normal mode.
When the WLAN (wireless local area network) access device was in described normal mode, if professional desired data throughput is lower than the maximum throughput rate of low performance pattern, described WLAN (wireless local area network) access device switched to the low performance pattern from described normal mode.
Another aspect of the present invention also provides a kind of WLAN (wireless local area network) access device mode of operation control device to comprise: module to be set, to be used to be provided with the different operating state of described WLAN (wireless local area network) access device under different working modes; Handover module is used to control the described module that is provided with, and when described WLAN (wireless local area network) access device satisfies the mode of operation switching condition, switches the operating state of described WLAN (wireless local area network) access device.
On the other hand, the present invention also provides a kind of method that is used to realize WLAN (wireless local area network) access device mode switch, described WLAN (wireless local area network) access network equipment can be worked in first mode of operation and second mode of operation, wherein first mode of operation is different from second mode of operation, and default described WLAN (wireless local area network) access device switches to the trigger condition of second mode of operation from first mode of operation, and this method comprises:
The described WLAN (wireless local area network) access device of operation under first mode of operation;
When trigger condition satisfies, operate described WLAN (wireless local area network) access device and switch to second mode of operation from first mode of operation.
Described first mode of operation comprises at least a in normal mode, low performance pattern, the idle pulley, described second mode of operation comprises " shut " mode", and described trigger condition comprises following at least a: the shut-in time arrival, the device free that set in advance surpass a Preset Time.
Described first mode of operation comprises " shut " mode", and described second mode of operation comprises normal mode, and described trigger condition comprises following at least a: the WLAN (wireless local area network) access network equipment powers on, resets.
Described first mode of operation comprises normal mode, and described second mode of operation comprises the low performance pattern, and described trigger condition comprises: the required bandwidth of transmission data is reduced to a predetermined value, and/or whether the Network Transmission state is stable.
Described first mode of operation comprises normal mode, and described second mode of operation comprises idle pulley, and described trigger condition comprises: after first transfer of data, free of data is mutual in a scheduled time.
Described first mode of operation comprises the low performance pattern, and described second mode of operation comprises normal mode, and described trigger condition comprises: the required bandwidth of transmission data is increased to a predetermined value.
Described first mode of operation comprises idle pulley, and described second mode of operation comprises normal mode, and described trigger condition comprises: under first mode of operation, described WLAN (wireless local area network) access device receives data.
Further, the described method that is used to realize WLAN (wireless local area network) access device mode switch, first mode of operation has set in advance: a Beacon frame sends at interval, first signal transmitting power, the first signal transmitting and receiving passage, described second mode of operation has set in advance the 2nd Beacon frame and has sent at interval, the secondary signal transmitted power, the secondary signal transceiver channel, described step: when trigger condition satisfies, operate described WLAN (wireless local area network) access device and switch to second mode of operation from first mode of operation, comprise: when trigger condition satisfied, a Beacon frame of adjusting under first mode of operation sent at interval, first signal transmitting power and the first signal transmitting and receiving passage are that the 2nd Beacon frame sends at interval under second mode of operation, the secondary signal transmitted power, the secondary signal transceiver channel.
Further, a described Beacon frame sends to send with the 2nd Beacon frame at interval and is first variation at interval, described first signal transmitting power, the first signal transmitting and receiving passage are second with secondary signal transmitted power, secondary signal transceiver channel to be changed, and described first variation and second changes opposite.
By technique scheme as can be seen, because module will be set, handover module is designed to a device, by being provided with, switching the different working modes of WLAN (wireless local area network) access device, can make access device under the prerequisite that satisfies Network Transmission requirement, customer requirements, be operated under the energy-conservation state, thereby reduced the energy consumption of access device on the whole.
Description of drawings
Fig. 1 is an applied scene schematic diagram of the present invention;
Fig. 2 is an embodiment of the invention WLAN (wireless local area network) access device working mode change schematic diagram;
Fig. 3 is the WLAN (wireless local area network) access device structural representation of one embodiment of the invention;
Fig. 4 is that the mode of operation of one embodiment of the invention is switched and the switching condition schematic diagram;
Fig. 5 is the framework schematic diagram of apparatus of the present invention embodiment.
Embodiment
Below in conjunction with drawings and Examples technical scheme of the present invention is described in detail.
Fig. 1 is an applied scene schematic diagram of the present invention.As shown in Figure 1, the WLAN (wireless local area network) access device is connected with user terminal by the wireless connections mode, for the user terminal data transmitting-receiving provides passage.The WLAN (wireless local area network) access device that the present invention is mainly among the figure provides a kind of energy-conservation method of work and the switching device shifter of energy conservation pattern, reduces the power consumption of access device.
Fig. 2 is an embodiment of the invention WLAN (wireless local area network) access device working mode change schematic diagram.As shown in Figure 2, the WLAN (wireless local area network) access device has 4 kinds of patterns: normal mode (Full Mode), low performance pattern (Low Mode), idle pulley (Standby Mode), " shut " mode" (Off Mode).
The operating state of four kinds of mode of operations is as follows:
Normal mode: equipment does not adopt any power-saving mechanism, and each module optimal performance work is the shortest as beacon interval (beacon interval), and when sending data, all radio circuit power amplifiers parts are operate as normal all;
The low performance pattern: when data send, send with low transmitting power, the radio circuit power amplifier partly has only the work of part passage, and it is long or the longest that the beacon frame sends the cycle.
Idle pulley: do not have Data Receiving and transmission, send the beacon frame with maximum duration interval, lowest transmit power, and the radio circuit power amplifier partly has only a passage job, other pathway closures;
" shut " mode": whole WLAN (wireless local area network) partial circuit quits work, and can not receive to send any signal.
Fig. 2 also illustrates the transition trigger condition of each mode of operation.Concrete trigger condition is as follows:
Trigger condition 1: when WLAN (wireless local area network) access device (hereinafter to be referred as " access device ") is in normal mode or low performance pattern or idle pulley, close access device by hardware button, perhaps by device system software control, from other state exchanges to closed condition;
When satisfying trigger condition 1, access device switches to " shut " mode" by normal mode, low performance pattern, idle pulley.
Trigger condition 2: when access device was in " shut " mode", access device resetted or powers on, and perhaps opened by hardware button, perhaps by device system software control access device, was transformed into normal mode from " shut " mode";
When satisfying trigger condition 2, access device is transformed into normal mode by " shut " mode".
Trigger condition 3: when access device was in normal mode, the circuit transmission quality was higher and volume of transmitted data is less, and bandwidth requirement is less.Perhaps, switch to the low performance pattern from normal mode by device system software control access device;
When satisfying trigger condition 3, access device is transformed into the low performance pattern from normal mode.
Trigger condition 4: when access device is in normal mode, without any transfer of data, perhaps, switch to idle pulley in the setting-up time from normal mode by device system software control access device;
When satisfying trigger condition 4, access device is transformed into idle pulley from normal mode.
Trigger condition 5: when access device was in the low performance pattern, volume of transmitted data was bigger, and perhaps the circuit transmission quality is relatively poor, perhaps by device system software control access device, switched to normal mode from low performance;
When satisfying trigger condition 5, access device from the low performance mode switch to normal mode.
Trigger condition 6: when access device was in idle pulley, access device received data, perhaps by device system software control access device, switched to normal mode from idle pulley;
When satisfying trigger condition 6, access device is transformed into normal mode from idle pulley.
With a specific embodiment, the method and apparatus of this patent is described below.
Embodiment 1:
The present embodiment WLAN devices possesses following feature:
1) Beacon interval adjustable extent: 20～1000ms;
2) transmission power adjustment scope: 5%, 25%, 50%, 75%, 100%;
3) radio circuit power amplifier passage: 3 passages, can close respectively and open;
4) Wireless LAN module can close and open by button;
Four kinds of mode of operations of equipment, correlation properties are as follows:
| Pattern | Beacon?interval | Transmitting power | Power amplifier passage (PA) |
| Normal mode | ??20ms | ??100％ | ??3 |
| The low performance pattern | ??500ms | ??50％ | ??2 |
| Idle pulley | ??1000ms | ??5％ | ??1 |
| Pattern | Beacon?interval | Transmitting power | Power amplifier passage (PA) |
| " shut " mode" | ??0％ | ??0 |
The main software and hardware structure of WLAN devices as shown in Figure 3,
Main control unit: the main control unit unit of WLAN devices, control appliance automaticallyes switch between various patterns according to various trigger conditions;
Driving interface: the unified interface of bottom layer driving comprises MAC control, power control, PA passage control section at least.
MAC control: control MAC framing and frame transmission, reception etc.;
Power control: control radio transmitted power;
PA passage control: control wireless receiving and dispatching passage, close and enable;
802.11MAC: carry out the IEEE802.11 agreement, be responsible for the parsing of framing function and frame etc.
Passage n: wireless transmission and receiving circuit, form by PA (power amplifier), Frontend (receiving front-end) and antenna.
Handover triggering condition is as shown in Figure 4 between four kinds of patterns:
State switches one: to " shut " mode", wireless correlation module all is in closed condition, does not work from normal mode, low performance pattern, idle pulley;
Trigger condition:
1) sets in advance the shut-in time, regularly close; Perhaps
2) device free surpasses certain hour;
State switches two: from the " shut " mode" to the normal mode;
Trigger condition:
1) device power, perhaps
2) reset;
State switches three: from normal mode to the low performance pattern,
1) main control unit calls driving interface closing passage 1, has only passage 2 and 3 normal transceive data;
2) main control unit calls the driving interface setting and controls by MAC, and the transmission of beacon frame is increased to 500ms at interval;
3) main control unit calls driving interface and controls by power, and the transmitting power of each passage is reduced to 50% of maximum transmission power;
Trigger condition:
1) the Vedio end of transmission is transmitted low volume data then, and bandwidth requirement reduces to below the 1M from 20M, and
2) the line signal quality is better.
State switches four: from the normal mode to the idle pulley,
1) main control unit calls driving interface closing passage 1 and 2, has only passage 3 normal transceive data;
2) main control unit calls the driving interface setting and controls by MAC, and the transmission of beacon frame is increased to 1000ms at interval;
3) main control unit calls driving interface and controls by power, and the transmitting power of each passage is reduced to 5% of maximum transmission power;
Trigger condition:
1) after the Video end of transmission, continuing did not have Data Receiving and transmission in 2 minutes;
State switches five: from the low performance pattern to normal mode,
1) main control unit calls driving interface and opens passage 1,2 and 3, and all passages are operate as normal all, can transceive data;
2) main control unit calls the driving interface setting and controls by MAC, and the transmission of beacon frame is increased to 20ms at interval;
3) main control unit calls driving interface and controls by power, and the transmitting power of each passage is reduced to maximum transmission power;
Trigger condition:
When 1) transmitting low volume data (bandwidth requirement at 1M once), there is mass data to need transmission (more than the bandwidth requirement 20M);
State switches six: from the idle pulley to the normal mode,
Trigger condition:
1) under the idle pulley, receives data.
Fig. 5 is the framework schematic diagram of apparatus of the present invention embodiment.As shown in the figure, WLAN (wireless local area network) access device mode of operation control device of the present invention comprises module and handover module is set.
Wherein, module is set and is used to be provided with the different operating state of described WLAN (wireless local area network) access device under different working modes.It can pass through main control unit in the embodiment shown in fig. 3, drives each control module, makes access device be in the preset working state.Such as, main control unit calls driving interface closing passage 1 and 2, has only passage 3 normal transceive data; Main control unit calls the driving interface setting and controls by MAC, and the transmission of beacon frame is set to 1000ms at interval; Main control unit calls driving interface and controls by power, and the transmitting power of each passage is set to 5% of maximum transmission power.By above-mentioned setting, access device just is set to idle pulley.
Handover module is used for the control setting module, when access device satisfies the mode of operation switching condition, switches the operating state of access device.It drives each control module by main control unit in the embodiment shown in fig. 3, makes access device switch to the operating state of expection.For example, when access device was in low performance state, access device receives mass data to be needed to handle, and handover module calls driving interface and opens passage 1,2 and 3 by main control unit, and all passages are operate as normal all, can transceive data; Call the driving interface setting by main control unit and control, the transmission of beacon frame is increased to 20ms at interval by MAC; Call driving interface by main control unit and control, the transmitting power of each passage is reduced to maximum transmission power by power.At this moment, the access device mode switch of finishing the work enters normal mode work.
Certainly; the present invention also can have other various embodiments; under the situation that does not deviate from spirit of the present invention and essence thereof; those of ordinary skill in the art work as can make various corresponding changes and distortion according to the present invention, but these corresponding changes and distortion all should belong to the protection range of the appended claim of the present invention.
Claims (20)
1. the method for work of a WLAN (wireless local area network) access device comprises:
The two or more different working modes of default WLAN (wireless local area network) access device, described different working modes has different service behaviours and different power consumptions, is applicable to different operative scenario respectively;
Described WLAN (wireless local area network) access device is in a kind of mode of operation following time, if satisfy the condition that mode of operation is switched, switches to another kind of mode of operation from a kind of mode of operation.
2. the method for work of WLAN (wireless local area network) access device as claimed in claim 1 is characterized in that, described different service behaviour comprises:
The Beacon frame sends interval, signal transmitting power, signal transmitting and receiving passage.
3. the method for work of WLAN (wireless local area network) access device as claimed in claim 1 or 2 is characterized in that, described different working modes comprises:
Normal mode, under the described normal mode, described WLAN (wireless local area network) access device beacon frame period is the shortest, and when sending data, all radio circuit power amplifier parts are operate as normal all;
Idle pulley, under the described idle pulley, described WLAN (wireless local area network) access device beacon frame period is the longest, and beacon frame transmitting power is minimum, does not have Data Receiving and transmission, and the radio circuit power amplifier partly has only a passage job, other pathway closures;
The low performance pattern, under the described low performance pattern, described WLAN (wireless local area network) access device beacon frame period is between described normal mode and described idle pulley, when data send, transmitting power is lower than described normal mode, and the radio circuit power amplifier partly has only the work of part passage;
" shut " mode", under the described " shut " mode", described WLAN (wireless local area network) access device circuit quits work, and does not receive and does not send any signal.
4. the method for work of WLAN (wireless local area network) access device as claimed in claim 3, it is characterized in that, when satisfying one of following condition, described WLAN (wireless local area network) access device switches to described " shut " mode" from described normal mode or described low performance pattern or described idle pulley:
Described WLAN (wireless local area network) access device hardware switch button is changed to closes, or
Described WLAN (wireless local area network) access device sets in advance and regularly closes, and regularly the shut-in time arrive, or
Described WLAN (wireless local area network) access device is idle above the predefined time.
5. the method for work of WLAN (wireless local area network) access device as claimed in claim 3 is characterized in that, when satisfying one of following condition, described WLAN (wireless local area network) access device switches to normal mode from described " shut " mode":
Described WLAN (wireless local area network) access device powers on, or
Described WLAN (wireless local area network) access device resets.
6. the method for work of WLAN (wireless local area network) access device as claimed in claim 3, it is characterized in that, when described WLAN (wireless local area network) access device is in described low performance pattern, if the transfer of data throughput surpasses data throughput maximum under the described low performance pattern, described WLAN (wireless local area network) access device from described low performance mode switch to normal mode.
7. the method for work of WLAN (wireless local area network) access device as claimed in claim 3, it is characterized in that, when described WLAN (wireless local area network) access device was in described idle pulley, if the data of receiving, described WLAN (wireless local area network) access device switched to normal mode from described idle pulley.
8. the method for work of WLAN (wireless local area network) access device as claimed in claim 3, it is characterized in that, when described WLAN (wireless local area network) access device is in described normal mode, if in setting-up time, do not receive constantly and the transmission data, described WLAN (wireless local area network) access device switches to idle pulley from described normal mode.
9. the method for work of WLAN (wireless local area network) access device as claimed in claim 3, it is characterized in that, when described WLAN (wireless local area network) access device is in described normal mode, if professional desired data throughput is lower than the maximum throughput rate of low performance pattern, described WLAN (wireless local area network) access device switches to the low performance pattern from described normal mode.
10. a WLAN (wireless local area network) access device mode of operation control device is characterized in that, comprising:
Module is set, is used to be provided with the different operating state of described WLAN (wireless local area network) access device under different working modes;
Handover module is used to control the described module that is provided with, and when described WLAN (wireless local area network) access device satisfies the mode of operation switching condition, switches the operating state of described WLAN (wireless local area network) access device.
11. WLAN (wireless local area network) access device mode of operation control device as claimed in claim 10 is characterized in that,
The operating state of described WLAN (wireless local area network) access device comprises:
The Beacon frame sends interval, signal transmitting power, signal transmitting and receiving passage.
12. method that is used to realize WLAN (wireless local area network) access device mode switch, described WLAN (wireless local area network) access network equipment can be worked in first mode of operation and second mode of operation, wherein first mode of operation is different from second mode of operation, and default described WLAN (wireless local area network) access device switches to the trigger condition of second mode of operation from first mode of operation, and this method comprises:
When trigger condition satisfies, operate described WLAN (wireless local area network) access device and switch to second mode of operation from first mode of operation.
13. method as claimed in claim 12, it is characterized in that: described first mode of operation comprises at least a in normal mode, low performance pattern, the idle pulley, described second mode of operation comprises " shut " mode", and described trigger condition comprises following at least a: the shut-in time arrival, the device free that set in advance surpass a Preset Time.
14. method as claimed in claim 12 is characterized in that: described first mode of operation comprises " shut " mode", and described second mode of operation comprises normal mode, and described trigger condition comprises following at least a: the WLAN (wireless local area network) access network equipment powers on, resets.
15. method as claimed in claim 12, it is characterized in that: described first mode of operation comprises normal mode, described second mode of operation comprises the low performance pattern, and described trigger condition comprises: the required bandwidth of transmission data is reduced to a predetermined value, and/or whether the Network Transmission state is stable.
16. method as claimed in claim 12 is characterized in that: described first mode of operation comprises normal mode, and described second mode of operation comprises idle pulley, and described trigger condition comprises: after first transfer of data, free of data is mutual in a scheduled time.
17. method as claimed in claim 12 is characterized in that: described first mode of operation comprises the low performance pattern, and described second mode of operation comprises normal mode, and described trigger condition comprises: the required bandwidth of transmission data is increased to a predetermined value.
18. method as claimed in claim 12, it is characterized in that: described first mode of operation comprises idle pulley, described second mode of operation comprises normal mode, and described trigger condition comprises: under first mode of operation, described WLAN (wireless local area network) access device receives data.
19. as claim 12 to each described method of claim 18, it is characterized in that: first mode of operation has set in advance: a Beacon frame sends at interval, first signal transmitting power, the first signal transmitting and receiving passage, described second mode of operation has set in advance the 2nd Beacon frame and has sent at interval, the secondary signal transmitted power, the secondary signal transceiver channel, described step: when trigger condition satisfies, operate described WLAN (wireless local area network) access device and switch to second mode of operation from first mode of operation, comprise: when trigger condition satisfied, a Beacon frame of adjusting under first mode of operation sent at interval, first signal transmitting power and the first signal transmitting and receiving passage are that the 2nd Beacon frame sends at interval under second mode of operation, the secondary signal transmitted power, the secondary signal transceiver channel.
20. as claim 19 a described method, it is characterized in that: a described Beacon frame sends to send with the 2nd Beacon frame at interval and is first variation at interval, described first signal transmitting power, the first signal transmitting and receiving passage are second with secondary signal transmitted power, secondary signal transceiver channel to be changed, and described first variation and second changes opposite.
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