CN101621806B - Intelligent carrier scheduling method applied to GSM network - Google Patents
Intelligent carrier scheduling method applied to GSM network Download PDFInfo
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Abstract
The invention provides an intelligent carrier scheduling method applied to a GSM network, which comprises the following steps that: a monitoring host computer of a radio frequency zooming unit acquires the original telephone traffic data counted by an FPGA chip through a digital board slave machine and converts the original telephone traffic data into standard telephone traffic data; and according to the requirements of the practical engineering application, a scheduling policy in a carrier-supported mode or a carrier standby mode is correspondingly adopted for a target cell so as to achieve the carrier intelligent scheduling. The method provides a policy of solving the intelligent carrier scheduling, automatically schedules carrier resources on the basis of network telephone traffic bearing conditions by setting correlative parameters for GSM mobile communication network optimization equipment (such as GRRU), and solves the problems of peak congestion of the telephone traffic, idle trough resources and the like, namely solving the problem that the wireless resources of the GSM network are distributed asymmetrically in the aspects of time and space.
Description
Technical field
The present invention relates to a kind of implementation method of wireless network resource dispatching technique, specifically be meant the intelligent carrier scheduling method that is applied to the GSM network.
Background technology
Along with the high speed development of mobile communication business, the GSM network traffic is also in continuous increase, and the user exists the imbalance, uncertain that distributes to the requirement of wireless carrier resource in the space, on the time.Therefore, be necessary that the carrier resource with base station section (BTS) unitizes, intelligent dispatch, and then realize that the optimization of network distributes, and improves wireless resource utility efficiency.
At present, the carrier dispatching of realizing the wireless coverage field mainly relies on " carrier tank " product to realize, though realized the optimized dispatching that Radio Resource is trans-regional, stride the period to a certain extent, but, its core technology realizes because also being based on " switch unit " of simulation, dispatching algorithm is only supported single " timing switch " mode, the phenomenon that rises sharply for the bursts of traffic amount lacks the real-time response ability, therefore all exists not enough in manufacturing cost, plant maintenance and user's operation.
GRRU series of products core component is all realized based on digital technology, is easy to by the unlatching of software control carrier wave, shutoff and frequency configuration, for intelligent carrier dispatching technology provides the necessary hardware condition.Simultaneously the GRRU product covers terminal (DRU) and can add up self traffic carried, and then understands its overlay area GSM Internet resources operating position, for the related algorithm of intelligent carrier dispatching technology provides the logical process foundation.
Summary of the invention
The objective of the invention is to overcome the shortcoming and defect of above-mentioned prior art, the intelligent carrier scheduling method that is applied to the GSM network is provided, it can better solve the intelligent carrier scheduling strategy, solves the GSM network radio resources in time, the unbalanced problem of spatial distribution.
Purpose of the present invention is achieved through the following technical solutions: should be used for the intelligent carrier scheduling method of GSM network, its step comprises:
The monitoring host computer of Remote Radio Unit obtains the original traffic data of fpga chip statistics by the digiboard slave, and be converted to the standard traffic data, needs according to practical engineering application, to the scheduling strategy of Target cell corresponding employing carrier wave help patterns or carrier wave standby mode, thereby realize the carrier intelligent scheduling;
When adopting the carrier wave help patterns, concrete steps are:
Whether the last column criterion traffic data of at first judging the neighbor cell of Target cell is higher than carrier wave unlatching telephone traffic thresholding, if, then adopt dynamic channel mapping method mappings work channel to digiboard, open the carrier switch of working channel, open descending power amplifier, carrier wave is carried out in the Target cell overlay area support, and keep the uplink and downlink power amplifier to open lasting one hour at least; Continue to detect the up telephone traffic of Target cell;
If the column criterion traffic data is lower than carrier wave and closes the telephone traffic thresholding on the working channel of neighbor cell carrying, then adopt soft cut-off method to close the working channel carrier wave, adopt the mapping of dynamic channel mapping method to detect channel to digiboard, open the carrier switch of sense channel, close descending power amplifier, and detect the up telephone traffic of Target cell in real time;
When adopting the carrier wave standby mode, concrete steps are:
Judge at first whether Target cell standard traffic data is higher than carrier wave and opens the telephone traffic thresholding, if, then open the alternate sector carrier switch of host sectors, kept standby carrier wave opening at least one hour, continue to detect the Target cell telephone traffic;
Open the telephone traffic thresholding if Target cell standard traffic data is lower than carrier wave, adopt soft shutoff technology to close the carrier wave of alternate sector, and detect the Target cell telephone traffic in real time.
For realizing the present invention better, the formula that described original telephone traffic sampled data is converted to the standard traffic data is: b=(a/N) * 8, wherein: original sampling data is a, the unit of a is chips, the standard traffic data is b, and the unit of b is Erlang, and N is the sampling proportionality constant, N=5760000, unit is: chips/Erlang.
Described dynamic channel mapping method is meant: be provided with N physical channel altogether in the physical channel tabulation of DRU equipment, when detecting the up telephone traffic of neighbor cell of Target cell, monitoring host computer is controlled its mapping selector and is detected in the channel group 1～N detection channel number and be set to working channel, and write the physical channel group, realize detection with this to the neighbor cell traffic carried situation of Target cell; When carrying out the carrier wave support, its corresponding DAU channel number tabulation of monitoring host computer is set to working channel, and writes the physical channel group, realizes that the information source of digital access unit zooms out the purpose of covering;
Preserve the DAU channel list in the monitoring host computer respectively and detect channel list, the physical channel tabulation is kept in the digiboard slave; Under different operating states, with the DAU channel list or after detecting channel list and setting into the digiboard slave, then can realize different operating states, and then realize dynamic carrier signal mapping by monitoring host computer control mapping selector.
Described soft cut-off method is meant: covering terminal at a GRRU equipment is in the Remote Radio Unit, guaranteeing under the constant prerequisite of host sectors carrier wave descending power, reduce step by step, the descending power of one or more carrier wave of alternate sector lentamente, turn-off its signal at last, it is cooperated with the digiboard slave by monitoring host computer finishes dealing with;
Described monitoring host computer cooperates the concrete steps of handling to be with the digiboard slave: at first monitoring host computer transmission " starts the soft shutoff of carrier wave " orders to the digiboard slave, and indicating in the order needs several roads of soft shutoff carrier wave; The digiboard slave parses soft shutoff number of carriers after receiving this order, being provided with then and turn-offing loop counter value is 20; Every 5 seconds, the digiboard slave is designated carrier power attenuation 3dB, and will turn-off the recurring series device and subtract 1 and handle; When this Counter Value equaled 0, decay work was finished step by step, and the digiboard slave sends " soft shutoff end " information to monitoring host computer; After monitoring host computer is received, send and close the corresponding carriers switch command to the digiboard slave; After receiving this order, the digiboard slave is closed the carrier channel of its appointment, and replys monitoring host computer and " turn-off successfully ", so far carrier wave step by step turn-off function finish.
The present invention compared with prior art, have following advantage and beneficial effect: propose a kind of solution intelligent carrier scheduling strategy, by the relevant parameter of GSM mobile communication network optimization equipment (as GRRU) is set, with network traffic carrying situation is foundation, automatically allocate carrier resource, solve problems such as the telephone traffic peak is congested, low ebb resource free time, promptly solved the GSM network radio resources in time, the unbalanced problem of spatial distribution.
Description of drawings
Fig. 1 is the fundamental diagram that the present invention is applied to the descending detection neighbor cell of the intelligent carrier scheduling method employing carrier wave help patterns telephone traffic of GSM network;
Wherein, 101-optical fiber, 102-Remote Radio Unit 1 (DRU), 4 carrier waves (up-downgoing) of 103-BTS1,104-residential block, 105-radio frequency feed line, 106-Remote Radio Unit 2 (DRU), 2 carrier wave upward signals of 107-BTS2,2 carrier waves (up-downgoing) of 108-BTS2, the 109-BTS1 carrier information source, 110-numeral access unit (DAU), 111-Remote Radio Unit 3 (DRU), 4 carrier waves (up-downgoing) of 112-BTS1, the 113-holiday village, 114-Office Area, 115-BTS2 carrier information source;
Fig. 2 is the fundamental diagram that the present invention is applied to the descending covering neighbor cell of intelligent carrier scheduling method employing carrier wave help patterns of GSM network;
Wherein, 201-optical fiber, 202-Remote Radio Unit 1 (DRU), 4 carrier waves (up-downgoing) of 203-BTS1,204-residential block, 205-radio frequency feed line, 206-Remote Radio Unit 2 (DRU), 4 carrier waves (up-downgoing) of 207-BTS1,2 carrier waves (up-downgoing) of 208-BTS2, the 209-BTS1 carrier information source, 210-numeral access unit (DAU), 211-Remote Radio Unit 3 (DRU), 4 carrier waves (up-downgoing) of 212-BTS1, the 213-holiday village, 214-Office Area, 215-BTS2 carrier information source;
Fig. 3 is the intelligent carrier scheduling method employing carrier wave standby mode operation principle that the present invention is applied to the GSM network;
Wherein, 301-BTS1 carrier information source (host sectors), 302-Remote Radio Unit 1 (DRU), 4 carrier waves (up-downgoing) of 303-BTS1, the 304-residential block, the 305-combiner unit, 306-numeral access unit (DAU), 307------Remote Radio Unit 2 (DRU), 2 carrier waves (up-downgoing) of 308-BTS2,4 carrier waves (up-downgoing) of 309-BTS1,310-Office Area, 311-BTS2 carrier information source (alternate sector), 312-Remote Radio Unit 3 (DRU), 2 carrier waves (up-downgoing) of 313-BTS2,314-holiday village, 4 carrier waves (up-downgoing) of 315-BTS1;
Fig. 4 realizes that the present invention is applied to the structural representation of monitoring mainboard and digiboard in the Remote Radio Unit that the intelligent carrier scheduling method of GSM network adopts;
Wherein, the 401-monitoring host computer, 402-RS-485 principal and subordinate machine communication link, the 403-digiboard, 404-digiboard slave, 405-slave inquiry FPGA, the 406-FPGA chip, the 407-slave is provided with FPGA, and the 408-slave is provided with gain, 409-D/A chip (GC5016);
Fig. 5 is the workflow diagram that the present invention is applied to the intelligent carrier scheduling method of GSM network;
Fig. 6 is the soft cut-off method realization flow schematic diagram that the present invention is applied to the intelligent carrier scheduling method employing of GSM network;
Fig. 7 is the realization flow schematic diagram that the present invention is applied to the dynamic channel mapping method that the intelligent carrier scheduling method of GSM network adopts;
Wherein, the 701-DAU channel list, 702-monitoring host computer Control Software, the 703-DAU channel group, 704-detects channel group, and 705-shines upon selector, 706-physical channel group, the tabulation of 707-physical channel, 708-detects channel group;
Fig. 8 is the test case figure of soft cut-off method shown in Figure 6.
Embodiment
Below in conjunction with embodiment and accompanying drawing, the present invention is described in further detail, but embodiments of the present invention are not limited thereto.
Embodiment one
As shown in Figure 4, provided each functional module composition that the carrier dispatching technology realizes.
As shown in Figure 4, the intelligent carrier scheduling method that should be used for the GSM network, in the GRRU-1022R structure, mainly work in coordination with and finish by 401 monitoring host computers and 403 digiboards, at first the monitoring host computer 401 of Remote Radio Unit obtains the original traffic data of fpga chip 406 statistics by digiboard slave 404, and be converted to the standard traffic data: promptly digiboard slave 404 is through the original telephone traffic sampled data of link 405 inquiries, then monitoring host computer is obtained the original traffic data of fpga chip 406 statistics indirectly by 404 digiboard slaves by RS-485 principal and subordinate machine communication link 402, monitoring host computer 401 carries out the traffic data processing then, analyze, by the decision of carrier dispatching algorithm whether fpga chip 406 is set at last and detects channel Mapping or D/A chip 409 is set and carry out actions such as the soft shutoff of carrier wave by digiboard slave 404.More than action is by monitoring host computer 401 transmitting order to lower levels, and digiboard slave 404 is carried out correlation function, finally finishes the carrier intelligent scheduling.
Formula I as shown in Figure 5, be original telephone traffic sampled data and be converted to the formula of standard traffic data: b=(a/N) * 8, wherein: original sampling data is a, the unit of a is chips, the standard traffic data is b, and the unit of b is Erlang, and N is the sampling proportionality constant, N=5760000, unit is: chips/Erlang.
Needs according to practical engineering application, when Target cell is adopted the carrier wave help patterns, be covered as example with three different districts, as shown in Figure 1, if DRU106 is operated under this kind pattern, DRU106 does not at first carry out downstream signal to Office Area 114 and covers, and only opens the up-link carrier channel of its neighbor cell BTS2 carrier information source 115, detect the last column criterion traffic data 107 of BTS2, and then can understand the live load of BTS2 carrier information source 115 in the Office Area 114; Go up column criterion traffic data 107 when this zone in 5 minutes and be higher than carrier wave unlatching telephone traffic thresholding, then as shown in Figure 2, adopt dynamic channel mapping method mappings work channel to digiboard 403, be that remote termination switches to 209BTS1 information source (promptly being operated under the 210DAU channel) with channel, up-downgoing is simultaneously opened simultaneously and is continued for an hour at least, standby covering is carried out in 207 pairs of Office Areas of 4 carrier waves (up-downgoing) 214 with BTS1, to reduce the load of BTS2 carrier information source 215, continue to detect Office Area 214 up telephone traffics simultaneously;
If column criterion traffic data 107 is lower than carrier wave and closes the telephone traffic thresholding on the working channel of BTS2 carrier information source 115 carrying, then adopt soft cut-off method to close the working channel carrier wave, adopt the mapping of dynamic channel mapping method to detect channel to digiboard 403, open the carrier switch of sense channel, close descending power amplifier, and detect Office Area 114 up telephone traffics in real time;
Wherein, as shown in Figure 7, described dynamic channel mapping method is meant: be provided with N physical channel altogether in the physical channel tabulation 707 of DRU equipment, when detecting the neighbor cell BTS2 carrier information source 115 up telephone traffics of Office Area 114,1～N the detection channel number that its mapping selector 705 of Control Software 702 controls of monitoring host computer 401 detects in the channel group 704 is set to working channel, and write physical channel group 706, realize detection with this to the neighbor cell BTS2 carrier information source 115 traffic carried situations of Office Area 114; When carrying out the carrier wave support, monitoring host computer 401 its corresponding DAU channel 703 numbered lists are set to working channel, and write physical channel group 706, realize that the information source of digital access unit zooms out the purpose of covering;
Preserve DAU channel list 701 in the monitoring host computer 401 respectively and detect channel list 704, physical channel tabulation 707 is kept in the digiboard slave 404; Under different operating states, by monitoring host computer 401 Control Software 702 control mapping selectors 705 with DAU channel list 701 or after detecting channel list 704 and setting into digiboard slave 404, then can realize different operating states, and then realize dynamic carrier signal mapping.
Described soft cut-off method is meant: covering terminal at a GRRU equipment is in the Remote Radio Unit, as shown in Figure 8, guaranteeing under the constant prerequisite of host sectors carrier wave 801 descending powers, reduce step by step, the descending power of one or more carrier wave of alternate sector 802 lentamente, turn-off its signal at last, it is cooperated with digiboard slave 404 by monitoring host computer 401 finishes dealing with;
Shown in Fig. 4,6, described monitoring host computer cooperates the concrete steps of handling to be with the digiboard slave: at first monitoring host computer 401 transmissions " the soft shutoff of startup carrier wave " are ordered to digiboard slave 404, and indicating in the order needs soft shutoff several roads carrier waves (for example having 8 road carrier waves); Digiboard slave 404 parses soft shutoff number of carriers after receiving this order, being provided with then and turn-offing loop counter value is 20; Every 5 seconds, digiboard slave 404 is designated carrier power attenuation 3dB, and will turn-off the recurring series device and subtract 1 and handle; When this Counter Value equaled 0, decay work was finished step by step, and digiboard slave 404 sends " soft shutoff end " information to monitoring host computer 401; After monitoring host computer 401 is received, send and close the corresponding carriers switch command to digiboard slave 404; After receiving this order, digiboard slave 404 is closed the carrier channel of its appointment, and replys monitoring host computer 401 and " turn-off successfully ", so far carrier wave step by step turn-off function finish.
Embodiment two
As shown in Figure 3, the intelligent carrier scheduling method that should be used for the GSM network, when adopting the carrier wave standby mode, concrete steps are: as shown in Figure 3, enter DAU equipment 306 after host sectors information source 301 and unit, alternate sector information source 311 ECDC road 305 merges, 3 DRU302,307 and 312 cover residential block 304,314 3 sub-districts in Office Area 310 and holiday village district jointly behind fiber optic stretch.When Office Area 310 telephone traffics decline at night, after being lower than " carrier wave is closed the traffic thresholding ", Remote Radio Unit DRU307 will close 2 carrier waves 313 of this regional alternate sector information source 311 automatically, and detect the Target cell telephone traffic in real time;
If residential block 304 bursts of traffic amount in 5 minutes rises, be higher than " carrier wave is opened the traffic thresholding ", then Remote Radio Unit DRU302 will open 2 carrier waves 308 of alternate sector information source 311 automatically, and continue 1 hour at least, and continue to detect the Target cell telephone traffic, thereby realizing that standby carrier resource is distributed rationally avoids frequent switching simultaneously.
Judge at first whether Target cell standard traffic data is higher than carrier wave and opens the telephone traffic thresholding, if, then open the alternate sector carrier switch of host sectors, kept standby carrier wave opening at least one hour, continue to detect the Target cell telephone traffic;
Open the telephone traffic thresholding if Target cell standard traffic data is lower than carrier wave, adopt soft shutoff technology to close the carrier wave of alternate sector, and detect the Target cell telephone traffic in real time.
Embodiment three
Certain building adopts two sectors of A, B that signal is carried out in the sub-district and covers.But along with increasingly competitiveization of real estate and residents ' health consciousness improve constantly, the sub-district auxiliary facility is progressively perfect, builds a fitness center.At ordinary times, the fitness center is generally used by the small part resident, and the A sector-carrier can satisfy the demands substantially, but patronizes resident's showed increased festivals or holidays, causes the fitness center traffic congestion serious.For this reason, adopt " carrier wave standby mode " to carry out carrier resource time distribution schedule.That is: as shown in Figure 5, only adopt the A sector-carrier to cover the fitness center at ordinary times, judge whether its standard traffic data is higher than carrier wave and opens the telephone traffic thresholding, after this zone telephone traffic is uprushed, be higher than carrier wave and open thresholding, with B sector-carrier switch opens, the shunting telephone traffic, Joint Support should cover in the zone, avoid congested, and keep A, B sector-carrier to be in opening at least one hour simultaneously, continue to detect its cell telephone traffic amount.Along with the fitness center passenger flow reduces gradually, if being lower than carrier wave, this regional standard traffic data opens the telephone traffic thresholding, then adopt soft shutoff technology to close the B sector-carrier, and detect the Target cell telephone traffic in real time.
Embodiment four
There are two sectors of A, B certain base station, and wherein the A sector-carrier believes that by the capital access control unit of GRRU equipment is sent to two Remote Radio Unit of R1, R2 and covers; The B sector directly covers the scenic spot, and telephone traffic is less at ordinary times, and golden week etc., holiday, telephone traffic was uprushed, and traffic congestion often takes place.By analysis, the R2 of carrying A sector signals is very near apart from the scenic spot, and telephone traffic is lower at ordinary times, therefore adopts the carrier wave help patterns with R2 the network optimization to be carried out in the scenic spot.As shown in Figure 5, R2 judges at first whether the last column criterion traffic data of the B sector that is in the scenic spot is higher than carrier wave and opens the telephone traffic thresholding, if, then adopt dynamic channel mapping method mapping A sector channel to digiboard, open corresponding carrier switch, open descending power amplifier, carrier wave is carried out in the scenic spot supports, and keeping the uplink and downlink power amplifier to open lasting one hour at least, R2 detects the up telephone traffic in A sector in the scenic spot simultaneously, to understand its load condition; If R2 covers in the scenic spot on the A sector column criterion traffic data and is lower than carrier wave and closes the telephone traffic thresholding, then R2 adopts soft cut-off method to close the A sector-carrier, adopt dynamic channel mapping method Mapping B sector channel to digiboard, open the carrier switch of sense channel, close descending power amplifier, and detect the up traffic situation in carrying scenic spot, B sector in real time.
As mentioned above, just can realize the present invention preferably, the foregoing description is preferred embodiment of the present invention only, is not to be used for limiting practical range of the present invention; Be that all equalizations of doing according to content of the present invention change and modification, all contained by claim of the present invention scope required for protection.
Claims (5)
1. be applied to the intelligent carrier scheduling method of GSM network, it is characterized in that may further comprise the steps: the monitoring host computer of Remote Radio Unit obtains the original traffic data of fpga chip statistics by the digiboard slave, and be converted to the standard traffic data, needs according to practical engineering application, to the scheduling strategy of Target cell corresponding employing carrier wave help patterns or carrier wave standby mode, thereby realize the carrier intelligent scheduling;
When adopting the carrier wave help patterns, concrete steps are:
Whether the last column criterion traffic data of at first judging the neighbor cell of Target cell is higher than carrier wave unlatching telephone traffic thresholding, if, then adopt dynamic channel mapping method mappings work channel to the digiboard slave, open the carrier switch of working channel, open descending power amplifier, carrier wave is carried out in the Target cell overlay area support, and keep the uplink and downlink power amplifier to open lasting one hour at least; Continue to detect the up telephone traffic of Target cell;
If the column criterion traffic data is lower than carrier wave and closes the telephone traffic thresholding on the working channel of neighbor cell carrying, then adopt soft cut-off method to close the working channel carrier wave, adopt the mapping of dynamic channel mapping method to detect channel to the digiboard slave, open the carrier switch of sense channel, close descending power amplifier, and detect the up telephone traffic of Target cell in real time;
When adopting the carrier wave standby mode, concrete steps are:
Judge at first whether Target cell standard traffic data is higher than carrier wave and opens the telephone traffic thresholding, if, then open the alternate sector carrier switch of host sectors, kept standby carrier wave opening at least one hour, continue to detect the Target cell telephone traffic;
Open the telephone traffic thresholding if Target cell standard traffic data is lower than carrier wave, adopt soft shutoff technology to close the carrier wave of alternate sector, and detect the Target cell telephone traffic in real time.
2. according to the described intelligent carrier scheduling method that is applied to the GSM network of claim 1, it is characterized in that: the formula that described original traffic data is converted to the standard traffic data is: b=(a/N) * 8, wherein: original traffic data is a, the unit of a is chips, the standard traffic data is b, and the unit of b is Erlang, and N is the sampling proportionality constant, N=5760000, unit is: chips/Erlang.
3. according to the described intelligent carrier scheduling method that is applied to the GSM network of claim 1, it is characterized in that: described dynamic channel mapping method is meant: be provided with N physical channel altogether in the physical channel tabulation of Remote Radio Unit equipment, when detecting the up telephone traffic of neighbor cell of Target cell, monitoring host computer is controlled its mapping selector and is detected in the channel group 1～N detection channel number and be set to working channel, and write the physical channel group, realize detection with this to the neighbor cell traffic carried situation of Target cell; When carrying out the carrier wave support, the digital access unit channel number tabulation of its correspondence of monitoring host computer is set to working channel, and writes the physical channel group, realizes that the information source of digital access unit zooms out the purpose of covering;
Preserve digital access unit channel list in the monitoring host computer respectively and detect channel list, the physical channel tabulation is kept in the digiboard slave; Under different operating states, with digital access unit channel list or after detecting channel list and setting into the digiboard slave, then can realize different operating states, and then realize dynamic carrier signal mapping by monitoring host computer control mapping selector.
4. according to the described intelligent carrier scheduling method that is applied to the GSM network of claim 1, it is characterized in that: described soft cut-off method is meant: covering terminal at a GRRU equipment is in the Remote Radio Unit, guaranteeing under the constant prerequisite of host sectors carrier wave descending power, reduce step by step, the descending power of one or more carrier wave of alternate sector lentamente, turn-off its signal at last, it is cooperated with the digiboard slave by monitoring host computer finishes dealing with.
5. according to the described intelligent carrier scheduling method that is applied to the GSM network of claim 4, it is characterized in that: described monitoring host computer cooperates the concrete steps of handling to be with the digiboard slave: at first monitoring host computer transmission " starts the soft shutoff of carrier wave " orders to the digiboard slave, and indicating in the order needs several roads of soft shutoff carrier wave; The digiboard slave parses soft shutoff number of carriers after receiving this order, being provided with then and turn-offing loop counter value is 20; Every 5 seconds, the digiboard slave is designated carrier power attenuation 3dB, and will turn-off the recurring series device and subtract 1 and handle; When this Counter Value equaled 0, decay work was finished step by step, and the digiboard slave sends " soft shutoff end " information to monitoring host computer; After monitoring host computer is received, send and close the corresponding carriers switch command to the digiboard slave; After receiving this order, the digiboard slave is closed the carrier channel of its appointment, and replys monitoring host computer and " turn-off successfully ", so far carrier wave step by step turn-off function finish.
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| CN102547959B (en) * | 2011-12-21 | 2014-08-20 | 华为技术有限公司 | Method and device for controlling transmission of carrier pilot frequency |
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| CN101621806A (en) | 2010-01-06 |
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