CN103051418A - Wireless communication and power line communication-based diversity transmission method - Google Patents
Wireless communication and power line communication-based diversity transmission method Download PDFInfo
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- CN103051418A CN103051418A CN2012105256373A CN201210525637A CN103051418A CN 103051418 A CN103051418 A CN 103051418A CN 2012105256373 A CN2012105256373 A CN 2012105256373A CN 201210525637 A CN201210525637 A CN 201210525637A CN 103051418 A CN103051418 A CN 103051418A
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Abstract
The invention relates to the technical field of data communication, and discloses a wireless communication and power line communication-based diversity transmission method, which specifically comprises the following steps of: 1, respectively transmitting a signal to be transmitted and a copy of the signal into a transmitting end in a unit of an IP (Internet Protocol) packet; 2, performing code modulation and analog front-end processing on the IP packet to be transmitted by a power line communication system transmitting end according to a power line transmission mode to obtain a power line transmitting signal, coupling to a power line to transmit, performing code modulation and analog front-end processing on the IP packet to be transmitted by a wireless communication system transmitting end according to a wireless transmission mode to obtain a wireless transmitting signal, and transmitting through a wireless channel in an electromagnetic wave form; 3, obtaining received data; and 4, selecting the successfully decoded IP packet as the final received data. By simultaneously arranging a power line communication channel and a wireless communication channel for simultaneously transmitting a data packet, the signal is decoded at the receiving end, and the successfully coded signal is selected as the final received signal, so that the transmission reliability of the system is improved.
Description
Technical field
The present invention relates to data communication technology field, relate in particular to a kind of diversity transmission method based on radio communication and power line communication.
Background technology
Along with the develop rapidly of the communication technology, the user is also growing for the demand of the business of the dependence high data rate transmission techniques such as HDTV (High-Definition Television), high-speed downloads.Wireless communication technology and power line communication technology are as the transmission technology of realization High Data Rate commonly used at present, because the advantage of himself is (such as the convenience of wireless communication technology, convenient characteristic; " always online " of power line communication technology, the low characteristic of cost of access), be subject to paying close attention to widely.
Yet as cost, it is also relatively poor that high data rate transmission techniques is often resisted the ability of channel degradation.Owing to there are the impacts such as multipath effect, noise jamming, channel time variation, the signal in the wireless channel and the signal in the power line channel may be subject to serious decay, thereby cause receiving terminal can't correctly receive transmitted signal.
Summary of the invention
The objective of the invention is the technical problem for the antagonism channel degradation ability of high data rate transmission techniques existence of the prior art, a kind of diversity transmission method based on radio communication and power line communication is provided.
Purpose of the present invention realizes by following technical proposals:
A kind of diversity transmission method based on radio communication and power line communication, it specifically comprises following steps: 1. signal to be transmitted and copy thereof are sent into respectively electric line communication system transmitting terminal and wireless communication system transmitting terminal take the IP bag as unit, and select the transmission mode of power line and wireless two channels according to system parameters and business information; 2. the electric line communication system transmitting terminal carries out coded modulation, AFE (analog front end) processing according to the power line transmission mode to IP bag to be transmitted, obtains power line and transmits, and is coupled in the power line and transmits; The wireless communication system transmitting terminal carries out coded modulation, AFE (analog front end) processing according to wireless communication mode to IP bag to be transmitted, obtains wireless transmission signal, transmits by wireless channel with the electromagnetic wave form; 3. the electric line communication system receiving terminal receives power line signal by coupler, through AFE (analog front end) processing, demodulation coding, obtains the power line receive data; The wireless communication system receiving terminal receives wireless signal, through AFE (analog front end) processing, demodulation coding, obtains the wireless receiving data; 4. take the IP bag as unit, select the wherein final receive data of IP bag conduct of any one successfully decoded of power line communication or radio communication.
Further, said method also comprises when wireless and two kinds of transmission means data transfer rates of power line are inconsistent, fills empty bag or other data in the transmission of data of the higher mode of data transfer rate, and is consistent with the actual data rate that keeps two kinds of transmission meanss.Business datum to be transmitted is packaged as the IP bag, between every IP bag of radio communication, inserts some other packets as redundancy, identical with the actual transfer rate that guarantees data under two kinds of transmission technologys, then transmit.
Further, the power line transmission mode in the above-mentioned steps 2 comprises the communication standard described in G.hn, IEEE Std 1901, PRIME or the G3-PLC standard.
Further, the wireless communication mode in the above-mentioned steps 2 comprises the communication standard described in Zigbee, UWB or the wlan standard.
Further, the system parameters in the above-mentioned steps 1 comprises the communication standard that channel width, system adopt; Described business information comprises professional transmission rate request, transmission reliability requirement.
Further, the coded modulation in the above-mentioned steps 2 comprise forward error correction coding, interweave, constellation mapping and framing.
Further, the demodulation coding in the above-mentioned steps 3 comprises synchronously, separates mapping, deinterleaving and decoding.
By adopting above technical scheme, the invention has the beneficial effects as follows: by simultaneously the transmission of data bag of two communication channels of power line communication and radio communication is set simultaneously, at receiving terminal signal is decoded, choose the signal of successfully decoded as the final signal that receives, improved the transmission reliability of system.In the time of can effectively preventing from relying in some cases the single transmission technology, the signal that causes owing to bad channel takes defeat.Take full advantage of the advantage of wireless channel and two kinds of transmission modes of power line channel, complement each other, a kind of diversity transmission method of high reliability High Data Rate is provided.Simultaneously, in the transmission of data of the higher mode of data transfer rate, fill empty bag or other data, consistent with the actual data rate that keeps two kinds of transmission meanss.
Description of drawings
Fig. 1 is the schematic flow sheet that the present invention is based on the diversity transmission method of radio communication and power line communication.
Embodiment
In order to make purpose of the present invention, technical scheme and advantage clearer, below in conjunction with Figure of description and specific embodiment, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, is not intended to limit the present invention.
The schematic flow sheet of the diversity transmission method that the present invention is based on radio communication and power line communication as shown in Figure 1, it specifically comprises following steps: signal to be transmitted and copy thereof are sent into respectively electric line communication system transmitting terminal and wireless communication system transmitting terminal take the IP bag as unit 1.; 2. the electric line communication system transmitting terminal carries out coded modulation, AFE (analog front end) processing according to the power line transmission mode to IP bag to be transmitted, obtains power line and transmits, and is coupled in the power line and transmits; The wireless communication system transmitting terminal carries out coded modulation, AFE (analog front end) processing according to wireless communication mode to IP bag to be transmitted, obtains wireless transmission signal, transmits by wireless channel with the electromagnetic wave form; 3. the electric line communication system receiving terminal receives power line signal by coupler, through AFE (analog front end) processing, demodulation coding, obtains the power line receive data; The wireless communication system receiving terminal receives wireless signal, through AFE (analog front end) processing, demodulation coding, obtains the wireless receiving data; 4. take the IP bag as unit, select the wherein final receive data of IP bag conduct of any one successfully decoded of power line communication or radio communication.Transmit simultaneously the IP bag by two communication channels of power line communication and radio communication are set simultaneously, at receiving terminal signal is decoded, choose the signal of successfully decoded as the final signal that receives, improved the transmission reliability of system.In the time of can effectively preventing from relying in some cases the single transmission technology, the signal that causes owing to bad channel takes defeat.Take full advantage of the advantage of wireless channel and two kinds of transmission modes of power line channel, complement each other, a kind of diversity transmission method of high reliability High Data Rate is provided.
Embodiment one
Present embodiment provides the application of diversity transmission method in the wideband multimedia transmission based on radio communication and power line communication that the present invention proposes, and requires to provide the high speed data transfers of 100Mbps.Details are as follows for related method flow and transmission mode:
S1, generation data to be transmitted according to system parameters and business information, are determined the professional transmission mode that adopts in power line communication and radio communication;
Radio communication adopts IEEE 802.11n standard, and channel width is 20MHz, adopts 3/4 code rate LDPC code as error correction coding, and 16QAM adopts long protection interval mode, the actual message transmission rate that can support 156Mbps as the constellation mapping mode; Power line communication adopts IEEE Std1901 standard, channel width is 20MHz, adopts 5/6 rate convolutional code as forward error correction coding (Forward Error Coding, FEC), 64QAM supports the message transmission rate of 100Mbps as the constellation mapping mode.Business datum to be transmitted is packaged as the IP bag, prepares transmission.Two kinds of different transmission technology parameters are different, the situation that the speed mismatch occurred, for radio communication, because the data transfer rate that can support than power line communication is high a lot, can when finishing diversity transmission, transmit other data: business datum to be transmitted is packaged as the IP bag, between every IP bag of radio communication, insert some other packets as redundancy, identical with the actual transfer rate that guarantees data under two kinds of transmission technologys, then transmit.
S2, radio communication transmitting terminal carry out coded modulation, AFE (analog front end) processing etc. according to transmission mode to data to be transmitted, obtain wireless transmission signal, transmit by wireless channel with the electromagnetic wave form; The power line communication transmitting terminal carries out coded modulation, AFE (analog front end) processing etc. according to transmission mode to identical data to be transmitted, obtains power line to transmit, and is coupled to and transmits in the power line;
IP bag waiting for transmission is processed according to the parameter request among the step S1, then transmitted by wireless communication technology and power line technology simultaneously.
In the present embodiment, code modulated step comprises forward error correction coding, interweaves, constellation mapping modulation and framing.
S3, radio communication receiving terminal receive wireless signal, through AFE (analog front end) processing, demodulation coding, obtain the wireless receiving data; The power line communication receiving terminal receives power line signal by coupler, through AFE (analog front end) processing, demodulation coding, obtains the power line receive data;
In the present embodiment, the step of demodulation coding comprises synchronously, separates mapping, deinterleaving and decoding.
S4, wireless receiving data and the power line receive data that receives merged processing, recover to make a start the transmission of data.
Merging the method for processing is take the IP bag as unit, carries out data selection according to the decoding situation under two kinds of transmission technologys, selects the packet of any one successfully decoded as final receive data.
In the transmission system that present embodiment provides, overall transmission rate is R=100Mbps, by diversity mode, has realized the requirement of reliable data transmission.
Embodiment two
Present embodiment provide that the present invention proposes based on joint transmission method the application in complex indoor environment communicate by letter of power line communication with radio communication.Details are as follows for related method flow and transmission mode:
S1, generation data to be transmitted according to system parameters and business information, are determined the professional transmission mode that adopts in power line communication and radio communication;
Radio communication adopts IEEE 802.11a standard, and channel width is 16.6MHz, adopts 1/2 rate convolutional code as error correction coding, and 16QAM supports the message transmission rate of 24Mbps as the constellation mapping mode; Power line communication adopts the G.hn standard, and channel width is 25MHz, adopts 1/2 code rate LDPC code as forward error correction coding (FEC), adopts QPSK as the constellation mapping mode, supports the message transmission rate of 25Mbps.Two kinds of different transmission technology parameters are different, the situation that the speed mismatch occurred, for power line, can when finishing diversity transmission, transmit other data, for simplicity, the packet of our additional transmissions sky: business datum to be transmitted is packaged as the IP bag, between the IP of power line communication bag, inserts some empty bags as redundant, identical with the actual transfer rate that guarantees data under two kinds of transmission technologys, then transmit.
S2, radio communication transmitting terminal carry out coded modulation, AFE (analog front end) processing etc. according to transmission mode to data to be transmitted, obtain wireless transmission signal, transmit by wireless channel with the electromagnetic wave form; The power line communication transmitting terminal carries out coded modulation, AFE (analog front end) processing etc. according to transmission mode to identical data to be transmitted, obtains power line to transmit, and is coupled to and transmits in the power line;
IP bag waiting for transmission is processed according to the parameter request among the step S1, then transmitted by wireless communication technology and power line technology simultaneously.
In the present embodiment, code modulated step comprises forward error correction coding, interweaves, constellation mapping modulation and framing.
S3, radio communication receiving terminal receive wireless signal, through AFE (analog front end) processing, demodulation coding, obtain the wireless receiving data; The power line communication receiving terminal receives power line signal by coupler, through AFE (analog front end) processing, demodulation coding, obtains the power line receive data;
In the present embodiment, the step of demodulation coding comprises synchronously, separates mapping, deinterleaving and decoding.
S4, wireless receiving data and the power line receive data that receives merged processing, recover to make a start the transmission of data.
Merging the method for processing is take the IP bag as unit, carries out data selection according to the decoding situation under two kinds of transmission technologys, selects the packet of any one successfully decoded as final receive data.
In the transmission system that present embodiment provides, actual overall transmission rate is R=24Mbps, by diversity mode, has realized the requirement of reliable data transmission.
Above-mentioned explanation illustrates and has described a preferred embodiment of the present invention, but as previously mentioned, be to be understood that the present invention is not limited to the disclosed form of this paper, should not regard the eliminating to other embodiment as, and can be used for various other combinations, modification and environment, and can in invention contemplated scope described herein, change by technology or the knowledge of above-mentioned instruction or association area.And the change that those skilled in the art carry out and variation do not break away from the spirit and scope of the present invention, then all should be in the protection range of claims of the present invention.
Claims (7)
1. diversity transmission method based on radio communication and power line communication, it specifically comprises following steps: 1. signal to be transmitted and copy thereof are sent into respectively electric line communication system transmitting terminal and wireless communication system transmitting terminal take the IP bag as unit, and select the transmission mode of power line and wireless two channels according to system parameters and business information; 2. the electric line communication system transmitting terminal carries out coded modulation, AFE (analog front end) processing according to the power line transmission mode to IP bag to be transmitted, obtains power line and transmits, and is coupled in the power line and transmits; The wireless communication system transmitting terminal carries out coded modulation, AFE (analog front end) processing according to wireless communication mode to IP bag to be transmitted, obtains wireless transmission signal, transmits by wireless channel with the electromagnetic wave form; 3. the electric line communication system receiving terminal receives power line signal by coupler, through AFE (analog front end) processing, demodulation coding, obtains the power line receive data; The wireless communication system receiving terminal receives wireless signal, through AFE (analog front end) processing, demodulation coding, obtains the wireless receiving data; 4. take the IP bag as unit, select the wherein final receive data of IP bag conduct of any one successfully decoded of power line communication or radio communication.
2. require 1 described diversity transmission method based on radio communication and power line communication such as claim, it is characterized in that described method also comprises when wireless and two kinds of transmission means data transfer rates of power line are inconsistent, in the transmission of data of the higher mode of data transfer rate, fill empty bag or other data, consistent with the actual data rate that keeps two kinds of transmission meanss.
3. the diversity transmission method based on radio communication and power line communication as claimed in claim 2 is characterized in that power line transmission mode in the described step 2 comprises the communication standard described in G.hn, IEEE Std 1901, PRIME or the G3-PLC standard.
4. the diversity transmission method based on radio communication and power line communication as claimed in claim 3 is characterized in that wireless communication mode in the described step 2 comprises the communication standard described in Zigbee, UWB or the wlan standard.
5. the diversity transmission method based on radio communication and power line communication as claimed in claim 4 is characterized in that the system parameters in the described step 1 comprises the communication standard that channel width, system adopt; Described business information comprises professional transmission rate request, transmission reliability requirement.
6. require 5 described diversity transmission methods based on radio communication and power line communication such as claim, it is characterized in that the coded modulation in the described step 2 comprises forward error correction coding, interweave, constellation mapping and framing.
7. the diversity transmission method based on radio communication and power line communication as claimed in claim 6 is characterized in that the demodulation coding in the described step 3 comprises synchronously, separates mapping, deinterleaving and decoding.
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| CN106533508A (en) * | 2016-12-15 | 2017-03-22 | 河南省科学院应用物理研究所有限公司 | Internet of things-based communication device and communication method |
| CN111465068A (en) * | 2020-03-18 | 2020-07-28 | 深圳市力合微电子股份有限公司 | Communication method for power line carrier and wireless dual-mode fusion |
| CN113595595A (en) * | 2021-08-02 | 2021-11-02 | 重庆邮电大学 | PLC and wireless fusion transmission method in power line communication system |
| CN113992242A (en) * | 2021-10-28 | 2022-01-28 | 重庆邮电大学 | Soft information merging method for frame load of PLC system |
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| CN113595595A (en) * | 2021-08-02 | 2021-11-02 | 重庆邮电大学 | PLC and wireless fusion transmission method in power line communication system |
| CN113595595B (en) * | 2021-08-02 | 2023-02-24 | 重庆邮电大学 | PLC and wireless fusion transmission method in power line communication system |
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| CN113992242B (en) * | 2021-10-28 | 2023-03-21 | 重庆邮电大学 | Soft information merging method for frame load of PLC system |
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Application publication date: 20130417 |