CN101027851A - Data communication system, data transmitting apparatus, data receiving apparatus, data communication method and data communication program - Google Patents
Data communication system, data transmitting apparatus, data receiving apparatus, data communication method and data communication program Download PDFInfo
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Abstract
There is provided a data communication system that performs power line communication having satisfactory communication quality by disposing data in channels where notches or noises do not exist in a distributed manner. There is included a step S01 of transmitting a pilot tone from a data transmitting device to a data receiving device, a step S03 of detecting a frequency band where a notch exists, among frequency bands used for the power line communication, on the basis of the pilot tone by means of the data receiving device, a step S05 of transmitting information on the frequency band where the notch exists, as channel information, to the data transmitting device by means of the data receiving device, a step S07 of setting a channel, which is located within a frequency band where a notch does not exist, as a channel used for the power line communication, by means of the data transmitting device, and a step S09 of disposing data, which is to be transmitted, in each channel and then transmitting the data to the data receiving device, by means of the data transmitting device.
Description
Technical field
The present invention relates to a kind of data communication system, data sending device, data sink and data communications method and DCP that carries out data communication by power line.
Background technology
In the past, there was under the situation of the trap (notch) that becomes the reason that worsens communication quality the method (with reference to patent documentation 1) of selecting employed subchannel to communicate in the known part that a kind of frequency of using arranged in communication.
In the communication means of record,, in communication, use the channel that does not have trap in the patent documentation 1 in order to improve the communication quality of relevant voice data and vision data.In this communication means, for the SN that increases employed channel than (signal to noise ratio), must increase transmitted power.But, after increasing transmitted power, can produce leakage electric field and become big problem in order to increase the SN ratio.
Patent documentation 1: the spy opens the 2000-216752 communique
Summary of the invention
The present invention considers that just the problems referred to above propose, its purpose is: provide a kind of by with the data decentralized configuration in the channel that does not have trap or noise, communicate data communication system, data sending device, data sink and data communications method and the DCP of the second best in quality power line communication.
The 1st invention of the present invention is a kind of data communication system, carries out power line communication between data sending device and data sink, and wherein, described data sending device has: the pilot tone sending part sends pilot tone to described data sink; The channel information acceptance division receives the pilot tone that sends according to described pilot tone sending part and the channel information that returns from described data sink, and this channel information is the information that does not have the frequency band of trap or noise; The transmitting channel configuration part is according to the channel information that described channel information acceptance division receives, the channel that utilizes when setting power line communication; The 1st data processing division, the processing of the data that configuration is used to send on the channel that carries out setting in described transmitting channel configuration part; With the data sending part, the data after described the 1st data processing division processing are sent to described data sink through power line, described data sink has: the pilot tone acceptance division receives pilot tone from described data sending device; Test section, the accepting state of the pilot tone that receives according to described pilot tone acceptance division detects the trap or the noise that exist in the frequency band that utilizes in the communication; Use the channel selection portion, avoid the detected frequency band that has trap or noise of described test section, the channel that utilizes when selecting to carry out power line communication; The channel information sending part, the information of the channel that described use channel selection portion is selected sends to described data sending device as channel information; Receive the data reception portion of data from described data sending device; The 2nd data processing division is configured in data in the channel that does not have trap or noise according to what described data reception portion received, and data are reduced; With data reproduction portion, to regenerating by the data after described the 2nd data processing division reduction.
In addition, the 2nd invention of the present invention is that described pilot tone sending part is avoiding disposing pilot tone on the detected in advance a plurality of channels that have the frequency band of trap or noise and select according to the data communication system of the 1st invention.
In addition, the 3rd invention of the present invention, be the data communication system according to the 1st or 2 inventions, described use channel selection portion only changes to the frequency band that does not have described trap or noise with the detected channel of the frequency band of trap or noise that exists of test section described in a plurality of channels.
In addition, the 4th invention of the present invention is a kind of data sending device, sends the data to data sink through power line, and have: the pilot tone sending part sends to described data sink with pilot tone; The channel information acceptance division receives the pilot tone that sends according to described pilot tone sending part and the channel information that returns from described data sink, and this channel information is the information that does not have the frequency band of trap or noise; The transmitting channel configuration part is according to the channel information that described channel information acceptance division receives, the channel that utilizes when setting power line communication; The 1st data processing division, the processing of the data that configuration is used to send on the channel that carries out setting in described transmitting channel configuration part; With the data sending part, the data after described the 1st data processing division processing are sent to described data sink through power line.
In addition, the 5th invention of the present invention is a kind of data sink, receives data through power line from data sending device, has: the pilot tone acceptance division receives pilot tone from described data sending device; Test section, the accepting state of the pilot tone that receives according to described pilot tone acceptance division detects the trap or the noise that exist in the frequency band that utilizes in the communication; Use the channel selection portion, avoid the detected frequency band that has trap or noise of described test section, the channel that utilizes when selecting to carry out power line communication; The channel information sending part, the information of the channel that described use channel selection portion is selected sends to described data sending device as channel information; Receive the data reception portion of data from described data sending device; The 2nd data processing division is configured in data in the channel that does not have trap or noise according to what described data reception portion received, and data are reduced; And data reproduction portion is to being regenerated by the data after described the 2nd data processing division reduction.
In addition, the 6th invention of the present invention, being a kind of data communications method, is the data communications method when carrying out power line communication between data sending device and data sink, comprising: the 1st step that pilot tone is sent to described data sink from described data sending device; Described data sink according to the pilot tone that receives from described data sending device, detects the 2nd step that has the frequency band of trap or noise among the frequency band that utilizes in the power line communication in described the 1st step; Described data sink, the information of will be in described the 2nd step detected frequency band that has trap or a noise sends to the 3rd step of described data sending device as channel information; Described data sending device, will there be the channel of the frequency band of trap or noise in the channel information according to sending from described data sink in described the 3rd step, be set at the 4th step of the channel that utilizes in the power line communication; With described data sending device, after the data that configuration is used to send on the channel of setting, send the data to the 5th step of described data sink in described the 4th step.
In addition, the 7th invention of the present invention, be according to the described data communications method of the 6th invention, described the 1st step, it is the step that to described data sink the frequency of pilot tone is changed continuously and sends from described data sending device, described the 2nd step is the frequency continually varying pilot tone that described data sink basis receives from described data sending device in described the 1st step, detects the step of the frequency band that has trap or noise among the frequency band that utilizes in power line communication.
In addition, the 8th invention of the present invention, be according to the described data communications method of the 6th or the 7th invention, for described data sending device and described data sink carrying out power line communication during, also detect the frequency band that does not have trap or noise at interval, and the channel that utilizes in the power line communication is changed to the channel of the frequency band that does not have trap or noise with official hour.
In addition, the 9th invention of the present invention, it is a kind of DCP, be the DCP when between data sending device and data sink, carrying out power line communication, be used to make computer to carry out following steps: the 1st step that pilot tone is sent to described data sink from described data sending device; Described data sink according to the pilot tone that receives from described data sending device, detects the 2nd step that has the frequency band of trap or noise among the frequency band that utilizes in the power line communication in described the 1st step; Described data sink, the information of will be in described the 2nd step detected frequency band that has trap or a noise sends to the 3rd step of described data sending device as channel information; Described data sending device, will there be the channel of the frequency band of trap or noise in the channel information according to sending from described data sink in described the 3rd step, be set at the 4th step of the channel that utilizes in the power line communication; With described data sending device, after the data that configuration is used to send on the channel of setting, send the data to the 5th step of described data sink in described the 4th step.
The invention effect
The 1st invention of the present invention when carrying out power line communication between data sending device and data sink, avoids existing the frequency band of trap or noise to communicate.Therefore, can use the channel of the frequency band that does not have trap or noise to carry out power line communication always, improve communication quality.
The 2nd invention of the present invention by the pilot tone sending part, is avoiding disposing pilot tone on the detected in advance a plurality of channels that have the frequency band of trap or noise and select.Promptly, by sending pilot tone according to the pattern of avoiding the channel that detected in advance trap pattern or noise pattern select, with the frequency band that uses in the communication all carried out scan condition with pilot tone compare, can carry out the detection of trap or noise with the short period.Therefore, according to the present invention, be applicable to the not data communication in cataclysmal dwelling house etc. of trap pattern and noise pattern.
The 3rd invention of the present invention by described use channel selection portion, only with the detected channel that has the frequency band of trap or noise of test section described in a plurality of channels, changes to the frequency band that does not have described trap or noise.Therefore, compare with the situation that alternate channel when producing trap is all, by the corresponding dynamics of channels change of the data (carrier wave) that only will take place to worsen, the reply trap that waits generation because of appending of household appliances connects or the modal shift of noise easily is more suitable for the real-time application in audio frequency etc.
The 4th invention of the present invention, by the 1st data processing division, configuration data on the channel of the frequency band that does not have trap or noise sends to data sink.Therefore, owing to select the good channel of communications status to carry out power line communication, when therefore consumed power can be reduced, can improve communication quality.
In addition, the 5th invention of the present invention by test section, detects the frequency band that has trap or noise, will not exist the information of channel of the frequency band of trap or noise to send to data sending device.Therefore, can receive data the channel be configured in the good frequency band of the communication quality that do not have trap or noise from data sending device.
In addition, the 6th invention of the present invention between data sending device and data sink, detects the channel of the frequency band that does not have trap or noise, and utilizes this channel to carry out power line communication.Therefore, owing to reduce the channel quantity that data sending device uses, thus can suppress consumed power, and can communicate the second best in quality power line communication.
In addition, the 7th invention of the present invention changes continuously by make the frequency of pilot tone from data sending device, detects trap or noise.Therefore, grasp the frequency band that has trap or noise in the frequency band that can utilize totally in power line communication, the channel by utilizing according to this Information Selection can communicate the second best in quality power line communication.
In addition, the 8th invention of the present invention to the frequency band that utilizes in the power line communication, detects whether have trap or noise at interval with official hour.Therefore, in the process of carrying out power line communication,, also can communicate the second best in quality power line communication in the channel that is utilizing by resetting the channel of the frequency band that does not have trap or noise even trap or noise take place always.
In addition, the 9th invention of the present invention is to control, so that between data sending device and data sink, detects the channel of the frequency band that does not have trap or noise, and utilizes this channel to carry out the program of power line communication.Therefore, owing to reduce the channel quantity that data sending device uses, thus can suppress consumed power, and can communicate the second best in quality power line communication.
Description of drawings
Fig. 1 is the precedence diagram of flow process of processing of the data communication system 10 of expression the 1st execution mode of the present invention.
Fig. 2 is the structure chart of the data communication system 10 of the 1st execution mode.
Fig. 3 is the block diagram of structure of the data sending device 2 of expression the 1st execution mode.
Fig. 4 is the circuit diagram that carries out the circuit 11 that the data operation of the 1st execution mode handles.
Fig. 5 is the block diagram of structure of the data sink 3 of expression the 1st execution mode.
Fig. 6 is the figure of the waveform of the data of expression when carrying out the data communication of the 1st execution mode.
Fig. 7 is the figure of the waveform combination of the pilot tone of expression when carrying out the data communication of the 2nd execution mode of the present invention.
Fig. 8 is the figure of the configuration change of the deterioration carrier wave corresponding channel of expression when carrying out the data communication of the 2nd execution mode.
Among the figure: 1-power line, 10-data communication system, 2-data sending device, 21-pilot tone sending part, 22-channel information acceptance division, 23-transmitting channel configuration part, the 24-data store, 25-data processing division, 26-data sending part, the 3-data sink, 31-pilot tone acceptance division, 32-trap test section (test section), 33-uses channel selection portion, 34-channel information sending part, 35-data reception portion, the 36-data processing division, 37-data reproduction portion.
Embodiment
Below, with reference to accompanying drawing the 1st execution mode of the present invention is described.
Fig. 2 is the structure chart of the data communication system 10 of the 1st execution mode of the present invention.
Fig. 3 is the block diagram of structure of the data sending device 2 of expression present embodiment.
Pilot tone sending part 21 changes the frequency of pilot tone continuously.The data of frequency continually varying pilot tone are sent to data sink 3 through power line 1.
Channel information acceptance division 22 receives " channel information " from data sink 3 through power line 1, should " channel information " is the information of channel that has the frequency band of trap in the frequency band that utilizes of power line communication.In addition, channel information acceptance division 22 outputs to transmitting channel configuration part 23 with " channel information " that receives through power line 1.
Transmitting channel configuration part 23 according to " channel information " from 22 inputs of channel information acceptance division, is chosen in the channel of the frequency band that does not have trap that is utilized when carrying out power line communication between data sending device 2 and the data sink 3.
In the data store 24, store and be used for sending to the music data of data sink 3 and image data etc. from data sending device 2.From data store 24, the data that 25 outputs are stored to the data handling part.
In addition, above-mentioned data processing division 25 has circuit shown in Figure 4 11.Data processing division 25, (X2-Y2 X3-Y3), multiply by factor alpha, the β of record in the coefficient table (diagram is omitted), repeats the processing of plus and minus calculation for X0-Y0, X1-Y1 to 4 subchannels.Below, the concrete processing method of circuit shown in Figure 4 11 is described.
At first, according to subchannel (X0-Y0) be multiply by the result that centre frequency obtains, obtain the result who subchannel (X1-Y1) be multiply by centre frequency.Then, according to subchannel (X1-Y1) be multiply by the result that centre frequency obtains, obtain the result who subchannel (X2-Y2) be multiply by centre frequency.Then, according to subchannel (X1-Y2) be multiply by the result that centre frequency obtains, obtain the result who subchannel (X3-Y3) be multiply by centre frequency.
Like this, data processing division 25 calculates as the multi-channel signal Z that sends signal with recursive procedure.
In addition, among Fig. 4, unit-distance code portion 100 is by being that unit handles constituting of necessary multiplier, adder, subtracter with the subchannel with each subchannel.Here, if want to increase the number of subchannels of processing, as long as the corresponding multistage connection unit-distance code of the part portion 100 that wants to increase.
Like this, by using recursive procedure, in multichannel communication system, cooperate with the change that sends the number of subchannels of handling and the structure that changes hardware becomes simple.
By data processing division 25 is constituted as shown in Figure 4, do not send the subchannel of the frequency band that has trap not being used in data, and on the subchannel of the non-existent frequency band of trap the decentralized configuration data, can communicate the second best in quality power line communication thus.
Fig. 5 is the block diagram of structure of the data sink 3 of expression present embodiment.
Pilot tone acceptance division 31 receives through the data of power line 1 from the pilot tone of data sending device 2 transmissions, and outputs to trap test section 32.
In the trap test section 32, will there be the information of the frequency band of trap in inspection from the state of the trap of the pilot tone of pilot tone acceptance division 31 inputs, detects as " trap information ", and outputs to the channel selection portion 33 that uses.
Use in the channel selection portion 33, according to " trap information " from 32 inputs of trap test section, the channel of the frequency band that does not have trap that utilizes when carrying out power line communication between selection and the data sending device 2, and conduct " channel information " sends to data sending device 2 through power line 1.In addition, use channel selection portion 33, to 35 outputs " channel information " of data handling part
In the data reproduction portion 37, to regenerating from " data " of data processing division 35 inputs.
In addition, each handling part of data in the data communication system 10, it is pilot tone sending part 21, channel information acceptance division 22, transmitting channel configuration part 23, data store 24, data processing division 25, data sending part 26, pilot tone acceptance division 31, trap test section 32, use channel selection portion 33, channel information sending part 34, data reception portion 35, data processing division 36, data reproduction portion 37 etc., can realize by the hardware of special use, in addition, each handling part also can be used as computer system and is made of memory and CPU (central integrating device), the program of the function by will being used for realizing each handling part and the data communications method of present embodiment described later is loaded into memory and carries out, and realizes its function.
That is, said procedure is computer-readable program, also can realize the part of above-mentioned functions and data communications method.Have, said procedure also can be the program that the combination of the program that write down in above-mentioned function and the computer system can be realized, promptly so-called differential file (difference program) again.
In addition, said procedure can through transmission medium or by the transmission ripple in the transmission medium, be sent to other computer system from the computer system this program being left in storage device etc.Above-mentioned transmission medium, the communication line (order wire) that refers to networks such as the Internet (communication network) and power line, telephone line etc. is this, the medium with function of transmission information.
In addition, above-mentioned memory, constituting of the memory of the volatibility of the recording medium of being read only by hard disk unit and non-volatile memory such as magneto-optical disc apparatus, flash memory, CD-ROM etc., RAM (Random Access Memory) and so on or they, embodied on computer readable, the recording medium that writes constitute.
Then, the action to the data communication system 10 of present embodiment describes.
Fig. 1 is the precedence diagram of the action of the data communication system 10 of expression present embodiment.
At first, the pilot tone sending part 21 of data sending device 2 shown in Fig. 6 (a), changes the frequency of pilot tone p continuously with f1, f2, f3, f4, and sends to data sink 3 (step S01) through power line 1.
In addition,,, produce the trap n1 shown in Fig. 6 (b) in the frequency band that data receiving system 3 is received here according to the influence of the household appliances etc. around the power line 1, the situation of n2 describes.
The pilot tone acceptance division 31 of data sink 3, the pilot tone that will send from the pilot tone sending part 21 of data sending device 2 receives (step S02) through power line 1.
Then, the trap test section 32 of data sink 3 detects whether there is trap (step S03) at employed frequency band to the pilot tone that receives.
In the communication environment of the power line between data sending device 2 and the data sink 3, because trap n1, n2 shown in Fig. 6 (b) takes place, therefore in the pilot tone (with reference to Fig. 6 (c)) that the pilot tone acceptance division 31 of data sink 3 is received, the distortion corresponding with trap n1, n2 can take place also.
Then, the use channel selection portion 33 of data sink 3 is to avoid the trap test section 32 detected modes that have the frequency band of trap, the channel (step S04) of selecting power line communication to utilize.
Then, the channel information sending part 34 of data sink 3, channel c1, the c2 of the frequency band that does not have trap that uses channel selection portion 33 to select, c3, c4 (with reference to Fig. 6 (d)) as " channel information ", are sent to the channel information acceptance division 2 (step S05) of data sending device 2 through power line 1.
" channel information " from channel information sending part 34 sends received (step S06) in the channel information acceptance division 22 of data sending device 2.
The transmitting channel configuration part 23 of data sending device 2 is according to " channel information " that channel information acceptance division 22 receives, channel c1, c2, c3, the c4 (with reference to Fig. 6 (d)) (step S07) of the frequency band that does not have trap that utilizes when setting power line communication.
The data processing division 25 of data sending device 2, according to utilizing channel c1, the c2 that sets by transmitting channel configuration part 23, the mode that c3, c4 carry out power line communication, be configured in the processing (step S08) on each channel after the data of storage in the data storage part 24 are carried out will data disperseing.
The data sending part 26 of data sending device 2 will be configured in data on the channel that does not have trap by data processing division 25, send to the data reception portion 35 (step S09) of data sink 3 through power line 1.
The data reception portion 35 of data sink 3 through power line 1, receives data (step S10) from data sending device 2.
Then, the data processing division 35 of data sink 3 reduces (step S11) to the data in the channel that does not have trap of being configured in that data acceptance division 35 receives.
The data reproduction portion 37 of data sink 3 is to " data " of data handling part 36 reduction regenerate (step S12).
In the past, in the power line communication of electrification line 1, because of the relation of leakage electric field and consumed power, the problem that existence can not significantly increase the power from data sending device 2 outputs.But, if use the data communication system 10 of above-mentioned embodiments of the present invention, then because in the channel of the frequency band that does not produce trap, disperse the back configuration to carry out power line communication the data that send, therefore can reduce the power consumption that signal post needs, simultaneously, can keep the communication quality good state to carry out power line communication.
In addition, owing to can dwindle the required consumed power of power line communication, therefore can reduce the leakage electric field that produces from power line 1.Therefore, can carry out power line communication under the good state more at communication quality.
Particularly, there is following problems,, in addition,, must guarantees the communication speed that certain speed is above always for the image that demonstration in video equipment etc. is sent here continuously promptly in order in sound machine etc., to keep audio quality.And if use the data communication system of present embodiment, just can address this is that.
In addition, owing to be not to use whole multichannels to carry out power line communication, but select not exist the channel of trap to use, the power that data sending device 2 consumes therefore can be reduced.
In addition, though in the above-mentioned execution mode, in the step S03 of Fig. 1, the situation of only carrying out the detection of a trap before the beginning power line communication is illustrated, be not to be defined in this.For example, also can carry out between data sending device 2 and the data sink 3 power line communication during continue to carry out the detection of trap, always utilize the channel of the frequency band that does not have trap to communicate.If adopt this structure, can improve the communication quality when carrying out power line communication.
In addition, in the above-mentioned execution mode, use the state of trap test section 32 inspections of data sink 3 from the pilot tone of pilot tone sending part 21 transmissions of data sending device 2 to passing through, the situation that detects the frequency band that has trap is illustrated, but is not to be defined in this.
For example, be not to make the frequency of pilot tone change continuously, but the full range band that uses in communication sends pilot tone simultaneously, detects the frequency band that has trap after receiving these pilot tones by data sink 3, utilized the power line communication that does not have the frequency band of trap thus.
In addition, select arbitrarily among the frequency band that can communicate from data sending device 2 that channel sends pilot tone, and only exist under the situation of trap among this channel being detected by data sink 3, the channel of reelecting other frequency band carries out power line communication.
In addition,, be not limited thereto, can use arbitrarily the number of channel to carry out power line communication though in the above-mentioned execution mode, the situation of using 4 or 8 channels to carry out power line communication is illustrated.
Then, to the 2nd execution mode of the present invention, describe with reference to Fig. 7 and Fig. 8.In addition, in the explanation of following execution mode,, and omit its explanation to the same structural element mark prosign that illustrates in the above-mentioned execution mode.
The difference of the 2nd execution mode and the 1st execution mode is, in the 1st execution mode, make pilot tone scan (sweep) on the whole, detect the frequency band that has trap, and in the 2nd execution mode, pilot tone sending part 21 disposes pilot tone in a plurality of channels of avoiding detecting in advance the frequency band selection that has trap.
That is, in general, the wiring of premises power line 1 is fixed, and a plurality of sockets (openstub) are the short circuit state when household appliances use.In addition, for the household appliances of premises, what often use is identical usually, and the pattern of the trap that is produced (pattern) is restricted.Therefore, the transmission characteristic of data communication meets several～tenss' kind assemble pattern substantially, can marked change.
Therefore, the data communication system of the 2nd execution mode change the user mode of a plurality of household appliances of infer using and to carry out the trap detection in advance on several～tens kind of pattern, and stores several～tenss' kind trap pattern.Then, pilot tone sending part 21, as shown in Figure 7, the trap pattern of avoiding this storage is set the configuration style of the channel of A～C, and sends in each channel configuration pilot tone of these configuration style.In addition, can store other the trap pattern that at every turn carries out obtaining when trap detects in use one by one, the pattern of the channel of change configuration pilot pattern.
Like this, by sending pilot tone, and the frequency band that uses in the communication is all compared with the pilot tone scan condition, can be carried out the detection of trap with the short period according to the pattern of avoiding the selected channel of detected in advance trap pattern.Thereby,, be suitable for the communication in little dwelling house of trap modal shift etc. according to the 2nd execution mode.
In addition, the difference with the 1st execution mode in the 2nd execution mode also is, uses channel selection portion 33, only with the 32 detected channels that have the frequency band of trap of trap test section in a plurality of channels, changes to the channel that does not have trap.Promptly, in the 1st execution mode, produce trap, then all avoid trap by alternate channel if append when connecting household appliances etc., and in the 2nd execution mode, only will dynamically change to the frequency band that does not have trap one by one because of trap causes the channel of the data (carrier wave) that worsen.
For example, below to transmitting channel configuration part 23, " channel information " that receives according to channel information acceptance division 22, as shown in Figure 8, the situation of setting channel c21, c22a, c23, c24, c25, c26, c27, c28 describes.
At this moment, in the data processing division 25, data are dispersed in configuration process on above-mentioned each channel, data sending part 26 sends through power line 1.
At this moment, power line 1 is appended the connection household appliances, produce trap in the frequency band of channel c22a, after the data that dispose among the channel c22a (carrier wave) worsen, detect this trap by trap test section 32 according to the reception result of pilot tone.And then, use channel information sending part 33, in the mode of the channel c22a of the frequency band of avoiding existing trap, the data (carrier wave) that only will be configured in channel c22a reconfigure to the channel c22b of other frequency bands.
Therefore, in the 2nd execution mode, the all situations of alternate channel are compared during with the generation trap, by only changing to the channel of the frequency band that does not have trap with the corresponding dynamics of channels of the data (carrier wave) that take place to worsen, tackle the modal shift of the trap that appending of household appliances connect to wait produce thus easily, be more suitable for real-time application in audio frequency etc.
More than, though embodiments of the present invention are illustrated with reference to accompanying drawing, concrete structure is not to be defined in these execution modes, can carry out design alteration etc. in the scope that does not break away from main idea of the present invention.
For example, in above-mentioned each execution mode,, also noise can be detected equally but not trap utilization does not exist the frequency band of noise to carry out power line communication equally though be to detect to utilize behind the trap not exist the frequency band of trap to carry out power line communication.
Utilize possibility on the industry
Use the data communication system of power line communication of the present invention, can be applied in communication quality and descend The audio equipment that tonequality can worsen, the view data that needs without delay demonstration to send continuously Video equipment etc. in.
Claims (9)
1. a data communication system is carried out power line communication between data sending device and data sink, wherein,
Described data sending device has:
The pilot tone sending part sends pilot tone to described data sink;
The channel information acceptance division receives the pilot tone that sends according to described pilot tone sending part and the channel information that returns from described data sink, and this channel information is the information that does not have the frequency band of trap or noise;
The transmitting channel configuration part is according to the channel information that described channel information acceptance division receives, the channel that utilizes when setting power line communication;
The 1st data processing division, the processing of the data that configuration is used to send on the channel that carries out setting in described transmitting channel configuration part; With
The data sending part sends to described data sink with the data after described the 1st data processing division processing through power line,
Described data sink has:
The pilot tone acceptance division receives pilot tone from described data sending device;
Test section, the accepting state of the pilot tone that receives according to described pilot tone acceptance division detects the trap or the noise that exist in the frequency band that utilizes in the communication;
Use the channel selection portion, avoid the detected frequency band that has trap or noise of described test section, the channel that utilizes when selecting to carry out power line communication;
The channel information sending part, the information of the channel that described use channel selection portion is selected sends to described data sending device as channel information;
Receive the data reception portion of data from described data sending device;
The 2nd data processing division is configured in data in the channel that does not have trap or noise according to what described data reception portion received, and data are reduced; With
Data reproduction portion is to being regenerated by the data after described the 2nd data processing division reduction.
2. data communication system according to claim 1 is characterized in that:
Described pilot tone sending part is avoiding disposing pilot tone on the detected in advance a plurality of channels that have the frequency band of trap or noise and select.
3. data communication system according to claim 1 and 2 is characterized in that:
Described use channel selection portion only changes to the frequency band that does not have described trap or noise with the detected channel of the frequency band of trap or noise that exists of test section described in a plurality of channels.
4. a data sending device sends the data to data sink through power line, has:
The pilot tone sending part sends to described data sink with pilot tone;
The channel information acceptance division receives the pilot tone that sends according to described pilot tone sending part and the channel information that returns from described data sink, and this channel information is the information that does not have the frequency band of trap or noise;
The transmitting channel configuration part is according to the channel information that described channel information acceptance division receives, the channel that utilizes when setting power line communication;
The 1st data processing division, the processing of the data that configuration is used to send on the channel that carries out setting in described transmitting channel configuration part; With
The data sending part sends to described data sink with the data after described the 1st data processing division processing through power line.
5. a data sink receives data through power line from data sending device, has:
The pilot tone acceptance division receives pilot tone from described data sending device;
Test section, the accepting state of the pilot tone that receives according to described pilot tone acceptance division detects the trap or the noise that exist in the frequency band that utilizes in the communication;
Use the channel selection portion, avoid the detected frequency band that has trap or noise of described test section, the channel that utilizes when selecting to carry out power line communication;
The channel information sending part, the information of the channel that described use channel selection portion is selected sends to described data sending device as channel information;
Receive the data reception portion of data from described data sending device;
The 2nd data processing division is configured in data in the channel that does not have trap or noise according to what described data reception portion received, and data are reduced; And,
Data reproduction portion is to being regenerated by the data after described the 2nd data processing division reduction.
6. a data communications method is the data communications method when carrying out power line communication between data sending device and data sink, comprising:
The 1st step that pilot tone is sent to described data sink from described data sending device;
Described data sink according to the pilot tone that receives from described data sending device, detects the 2nd step that has the frequency band of trap or noise among the frequency band that utilizes in the power line communication in described the 1st step;
Described data sink, the information of will be in described the 2nd step detected frequency band that has trap or a noise sends to the 3rd step of described data sending device as channel information;
Described data sending device, will there be the channel of the frequency band of trap or noise in the channel information according to sending from described data sink in described the 3rd step, be set at the 4th step of the channel that utilizes in the power line communication; With
Described data sending device after the data that configuration is used to send on the channel of setting, sends the data to the 5th step of described data sink in described the 4th step.
7. data communications method according to claim 6 is characterized in that:
Described the 1st step is the step that to described data sink the frequency of pilot tone is changed continuously and sends from described data sending device,
Described the 2nd step is the frequency continually varying pilot tone that described data sink basis receives from described data sending device in described the 1st step, detects the step of the frequency band that has trap or noise among the frequency band that utilizes in power line communication.
8. according to claim 6 or 7 described data communications methods, it is characterized in that:
For described data sending device and described data sink carrying out power line communication during, also detect the frequency band that does not have trap or noise at interval, and the channel that utilizes in the power line communication is changed to the channel of the frequency band that does not have trap or noise with official hour.
9. a DCP is the DCP when carrying out power line communication between data sending device and data sink, is used to make computer to carry out following steps:
The 1st step that pilot tone is sent to described data sink from described data sending device;
Described data sink according to the pilot tone that receives from described data sending device, detects the 2nd step that has the frequency band of trap or noise among the frequency band that utilizes in the power line communication in described the 1st step;
Described data sink, the information of will be in described the 2nd step detected frequency band that has trap or a noise sends to the 3rd step of described data sending device as channel information;
Described data sending device, will there be the channel of the frequency band of trap or noise in the channel information according to sending from described data sink in described the 3rd step, be set at the 4th step of the channel that utilizes in the power line communication; With
Described data sending device after the data that configuration is used to send on the channel of setting, sends the data to the 5th step of described data sink in described the 4th step.
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| Application Number | Priority Date | Filing Date | Title |
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| JP255415/2004 | 2004-09-02 | ||
| JP2004255415 | 2004-09-02 | ||
| JP233822/2005 | 2005-08-11 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102934368A (en) * | 2010-06-09 | 2013-02-13 | 索尼公司 | Method for operating a plc system, plc modem device and plc system |
| CN103078668A (en) * | 2013-02-01 | 2013-05-01 | 北京曼若科技有限公司 | Power line communication method and device |
| CN104145430A (en) * | 2012-03-20 | 2014-11-12 | 宗拓贝尔照明器材有限公司 | Method for transmitting data |
-
2005
- 2005-09-02 CN CN 200580029202 patent/CN101027851A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102934368A (en) * | 2010-06-09 | 2013-02-13 | 索尼公司 | Method for operating a plc system, plc modem device and plc system |
| CN102934368B (en) * | 2010-06-09 | 2014-12-31 | 索尼公司 | Method for operating a PLC system, PLC modem device and PLC system |
| US9379923B2 (en) | 2010-06-09 | 2016-06-28 | Sony Corporation | Method for operating a PLC system, PLC modem device and PLC system |
| CN104145430A (en) * | 2012-03-20 | 2014-11-12 | 宗拓贝尔照明器材有限公司 | Method for transmitting data |
| CN104145430B (en) * | 2012-03-20 | 2017-06-06 | 宗拓贝尔照明器材有限公司 | For transmitting data method |
| CN103078668A (en) * | 2013-02-01 | 2013-05-01 | 北京曼若科技有限公司 | Power line communication method and device |
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