WO2014131204A1 - 一种用于经由电力线通信的方法和装置 - Google Patents

一种用于经由电力线通信的方法和装置 Download PDF

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Publication number
WO2014131204A1
WO2014131204A1 PCT/CN2013/072245 CN2013072245W WO2014131204A1 WO 2014131204 A1 WO2014131204 A1 WO 2014131204A1 CN 2013072245 W CN2013072245 W CN 2013072245W WO 2014131204 A1 WO2014131204 A1 WO 2014131204A1
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Prior art keywords
carrier frequency
frequency bands
data
power line
pilot signal
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PCT/CN2013/072245
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English (en)
French (fr)
Inventor
叶华
Original Assignee
西门子公司
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Filing date
Publication date
Application filed by 西门子公司 filed Critical 西门子公司
Priority to MX2015010969A priority Critical patent/MX342367B/es
Priority to ES13876649T priority patent/ES2737801T3/es
Priority to EP13876649.8A priority patent/EP2963838B1/en
Priority to BR112015020599-2A priority patent/BR112015020599B1/pt
Priority to CN201380073127.XA priority patent/CN104995847B/zh
Publication of WO2014131204A1 publication Critical patent/WO2014131204A1/zh

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B3/00—Line transmission systems
    • H04B3/54—Systems for transmission via power distribution lines
    • H04B3/544—Setting up communications; Call and signalling arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0002—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission rate
    • H04L1/0003—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission rate by switching between different modulation schemes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0003—Two-dimensional division
    • H04L5/0005—Time-frequency
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0037—Inter-user or inter-terminal allocation
    • H04L5/0041—Frequency-non-contiguous
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B2203/00—Indexing scheme relating to line transmission systems
    • H04B2203/54—Aspects of powerline communications not already covered by H04B3/54 and its subgroups
    • H04B2203/5404—Methods of transmitting or receiving signals via power distribution lines
    • H04B2203/5425—Methods of transmitting or receiving signals via power distribution lines improving S/N by matching impedance, noise reduction, gain control
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B2203/00—Indexing scheme relating to line transmission systems
    • H04B2203/54—Aspects of powerline communications not already covered by H04B3/54 and its subgroups
    • H04B2203/5462—Systems for power line communications
    • H04B2203/5495—Systems for power line communications having measurements and testing channel

Definitions

  • the present invention relates to the field of power line carrier communications, and more particularly to a method and apparatus for communicating via power lines. Background technique
  • Power Line Carrier Communication is a power system communication in which a transmission line is used as a transmission medium of a carrier signal. Since the transmission line has a very strong support structure and three or more conductors (generally three-phase good conductors and one or two overhead ground lines), the transmission line transmits the power frequency current and transmits the carrier signal, which is economical and Very reliable. Therefore, power line carrier communication has become a unique communication means preferred by the power sector.
  • the communication device utilizes a continuous carrier frequency band of the power line to transmit data for various services, the bandwidth of the continuous carrier frequency band being sufficient to guarantee communication quality requirements of the communication device.
  • a continuous carrier frequency band is shown in Figure 1A.
  • each occupied frequency band itself is a continuous carrier frequency band, and each occupied frequency band is mutually mutual independent.
  • the unoccupied carrier frequency band of the power line (as shown in FIG. 1B)
  • a continuous carrier band not less than the established band can not be found for use by these communication devices.
  • these communication devices can only reduce communication quality requirements (e.g., reduce the amount of traffic and/or reduce the data rate) by using a continuous carrier frequency band of the power line that is less than the specified band.
  • Embodiments of the present invention provide a method and apparatus for communication via power lines that can guarantee communication quality requirements of a communication device.
  • a method for communicating via power line comprising: continuously transmitting a pilot signal having a predetermined level on each of a plurality of carrier frequency bands of a power line, wherein the plurality of carrier frequency bands are mutually separated And transmitting data on each of the plurality of carrier frequency bands.
  • the data sent on each of the multiple carrier frequency bands respectively belong to different services.
  • a method for communicating via power line comprising: receiving pilot signals and data from each of a plurality of carrier frequency bands of a power line, wherein the plurality of carrier frequency bands are mutually discrete; a level value of the pilot signal received by each of the plurality of carrier frequency bands; and, based on the calculated level value of the pilot signal received from each of the plurality of carrier frequency bands, from the plurality of Automatic gain control is performed on each received data of the carrier frequency band.
  • the data received from each of the plurality of carrier frequency bands respectively belong to different services.
  • An apparatus for communicating via a power line includes: a transmitting module, configured to continuously transmit a pilot signal having a predetermined level on each of a plurality of carrier frequency bands of a power line, wherein the multiple The carrier frequency bands are mutually discrete; and a transmitting module is configured to transmit data on each of the plurality of carrier frequency bands.
  • the data sent on each of the multiple carrier frequency bands respectively belong to different services.
  • An apparatus for communicating via a power line includes: a receiving module, configured to receive a pilot signal and data from each of a plurality of carrier frequency bands of a power line, wherein the plurality of carrier frequency bands are mutually discrete a calculation module, configured to calculate a level value of the pilot signal received from each of the plurality of carrier frequency bands; and a gain control module configured to calculate each of the plurality of carrier frequency bands according to the calculation The level value of the received pilot signal performs automatic gain control on data received from each of the plurality of carrier frequency bands.
  • the data received from each of the plurality of carrier frequency bands respectively belong to different services.
  • the solution of the embodiment of the present invention combines a plurality of mutually discrete carrier frequency bands of the power line to meet the bandwidth requirements required for communication, and transmits on each of the plurality of mutually discrete carrier frequency bands.
  • the level requirement therefore, compared with the prior art, the solution of the embodiment of the invention can guarantee the communication quality requirement of the communication device.
  • FIG. 1A An example of a continuous carrier frequency band is shown in Figure 1A.
  • Figure 1B shows a schematic diagram of the carrier frequency band of the power line.
  • FIG. 2 shows a schematic diagram of a power line carrier communication system in accordance with one embodiment of the present invention.
  • FIG. 3 shows a flow chart of a method for communicating via power lines in accordance with one embodiment of the present invention.
  • FIG. 4 shows a schematic diagram of an apparatus for communicating via power lines in accordance with one embodiment of the present invention.
  • Figure 5 shows a schematic diagram of an apparatus for communicating via power lines in accordance with another embodiment of the present invention.
  • Figure 6 shows a schematic diagram of a communication device in accordance with one embodiment of the present invention.
  • FIG. 7 shows a schematic diagram of a communication device in accordance with another embodiment of the present invention. detailed description
  • the power line carrier communication system 100 includes, for example, a communication device 110, a communication device 120, a communication device 130, a communication device 140, and a power line 150 that connects the respective communication devices.
  • the communication device 110, the communication device 120, the communication device 130, and the communication device 140 can communicate with each other through the power line 150.
  • the data sent by one communication device can be regarded as the data of a power line communication user.
  • the user data may include a single service or a different plurality of services.
  • Figure 3 shows a flow diagram of a method for communicating via power lines in accordance with one embodiment of the present invention.
  • the method of the present embodiment is described in detail by taking the communication device 110 transmitting data to the communication device 130 via the power line 150, and it is assumed that the bandwidth required for the communication device 110 to transmit data to the communication device 130 is K.
  • step S300 if the power line 150 does not have an unused carrier frequency band whose bandwidth is not less than K, the communication device 110 and the communication device 130 acquire the unoccupied carrier frequency band on the power line 150, and Select multiple carrier bands PD.
  • the total bandwidth of the multiple carrier frequency bands PD is greater than or equal to K.
  • the plurality of carrier frequency bands PD are mutually discrete, for example, the plurality of carrier frequency bands PD are spaced apart from each other by the occupied carrier frequency.
  • the interval between the multiple carrier frequency band PD and the occupied carrier frequency band also satisfies the communication interference requirement.
  • the unoccupied carrier frequency band may be known in advance for each communication device, or may be known by detecting a signal on the power line.
  • the communication device 110 continuously transmits a pilot signal having a predetermined level on each of the plurality of carrier frequency bands PD of the power line 150.
  • step S308 the communication device 110 transmits on each of the plurality of carrier frequency bands PD of the power line 150.
  • Data transmitted to the communication device 130 may be, for example, different service data of the same power line communication user.
  • the communication device 130 receives the pilot signals and data transmitted by the communication device 110 from each of the plurality of carrier frequency bands PD of the power line 150.
  • these carrier frequency bands are known in advance.
  • the communication device 130 can be informed of these carrier frequency bands in advance, as well as by detecting signals on the power lines.
  • the communication device 130 calculates the level value of the pilot signal received from each of the plurality of carrier frequency bands PD.
  • step S320 the communication device 130 performs automatic gain control on data received from each of the plurality of carrier frequency bands PD based on the level value of the pilot signal received from each of the plurality of carrier frequency bands PD, such that The signal level of the data meets the predetermined signal level requirements.
  • the communication device 130 may further perform subsequent processing, such as demodulation, decoding, etc., on the received data.
  • the solution of the present embodiment combines a plurality of mutually discrete carrier frequency bands of the power line 150 to meet the bandwidth requirements required for communication, and transmits on each of the plurality of mutually discrete carrier frequency bands.
  • the pilot signal is configured to enable the communication device 130 as the receiver to perform automatic gain control on data received from each of the plurality of carrier frequency bands based on a level value of the pilot signal transmitted on each of the plurality of carrier frequency bands. The signal level requirement is met, and therefore, the solution of the embodiment can guarantee the communication quality requirement of the communication device.
  • the power line carrier communication system 100 includes four communication devices in the above embodiments, the present invention is not limited thereto. In some other embodiments of the invention, the number of communication devices included in power line carrier communication system 100 may be less than four or more than four.
  • the communication device 110 and the communication device 130 are from the respective power lines 150.
  • a plurality of carrier frequency bands are selected for communication among the unused carrier frequency bands, however, the present invention is not limited thereto. In some other embodiments of the present invention, even in the case where the power line 150 has an unused carrier frequency band whose bandwidth is not less than K, the communication device 110 and the communication device 130 may be unused from each of the power lines 150. Multiple carrier frequency bands are selected for communication in the carrier frequency band.
  • the data transmitted by the communication device 110 on each of the plurality of carrier frequency bands PD may belong to different services (e.g., digital data service, analog voice service, analog digital service, and protection signaling service, etc.).
  • the plurality of carrier frequency bands PD are mutually discrete, mutual interference between the respective services is reduced or even eliminated.
  • the communication device 110 can also be in several carriers of the multiple carrier frequency band PD. Simultaneously transmit the same data of the same service in the frequency band.
  • the communication device 130 as the receiving side can receive the same data of the same service from the other carrier frequency bands of the plurality of carrier frequency bands.
  • the communication device 130 may only accept the data received from the carrier frequency band with the best signal quality condition as the received data. Or, the data obtained by weighting and summing the plurality of identical data may be used as the received data.
  • the communication device 110 can measure the signal quality condition of each of the plurality of carrier frequency bands PD, and then, The communication device 110 modulates data to be transmitted on each of the plurality of carrier frequency bands PD using a suitable modulation method according to the measured signal quality conditions of each of the plurality of carrier frequency bands PD, and finally, modulating The subsequent data is sent on the corresponding carrier frequency band.
  • the suitable modulation method is selected as follows: a modulation method capable of obtaining a higher effective data transmission rate when the signal quality of the carrier frequency band is good; and an anti-interference capability when the signal quality of the carrier frequency band is poor. Strong modulation method.
  • the modulation method employed for the data transmitted on each of the carrier frequency bands PD of the plurality of carrier frequency bands PD is determined based on the signal quality condition of the carrier frequency band PDi.
  • FIG. 4 there is shown a schematic diagram of an apparatus for communicating via power lines in accordance with one embodiment of the present invention.
  • the apparatus shown in Fig. 4 can be implemented by software, hardware (e.g., integrated circuit or FPGA, etc.) or a combination of hardware and software, and can be installed in a communication device as a sender.
  • the apparatus 400 for communicating via power lines may include a transmitting module 410 and a transmitting module 420.
  • the sending module 410 may be configured to continuously transmit a pilot signal having a predetermined level on each of a plurality of carrier frequency bands of the power line, wherein the plurality of carrier frequency bands are mutually discrete.
  • the transmitting module 420 can be configured to transmit data on each of the plurality of carrier frequency bands.
  • the data sent on each of the multiple carrier frequency bands may belong to different services.
  • the modulation method employed by the data transmitted on each of the plurality of carrier frequency bands is determined based on the signal quality condition of the carrier frequency band.
  • apparatus 500 for communicating via power lines can include a receiving module 510, a computing module 520, and a gain control module 530.
  • the receiving module 510 can be configured to receive pilot signals and data from each of a plurality of carrier frequency bands of the power line, wherein the plurality of carrier frequency bands are mutually discrete.
  • the calculation module 520 can be configured to calculate a level value of the pilot signal received from each of the plurality of carrier frequency bands.
  • the gain control module 530 can be configured to perform automatic gain control on data received from each of the plurality of carrier frequency bands according to the calculated level value of the pilot signal received from each of the plurality of carrier frequency bands .
  • the data received on each of the multiple carrier frequency bands may belong to different services.
  • a modulation method employed for data received on each of the plurality of carrier frequency bands is determined based on a signal quality condition of the carrier frequency band.
  • the data received in the at least one carrier frequency band of the multiple carrier frequency bands may be the same data of the same service.
  • communication device 600 can include a memory 610 and a processor 620 for storing executable instructions.
  • the processor 620 may perform the following operations according to the executable instructions stored in the memory 610: continuously transmitting a pilot signal having a predetermined level on each of multiple carrier frequency bands of the power line, where the multiple carrier frequency bands are Discrete with each other; and, transmitting data on each of the plurality of carrier frequency bands.
  • the data sent on each of the multiple carrier frequency bands may belong to different services.
  • the modulation method employed by the data transmitted on each of the plurality of carrier frequency bands is determined based on the signal quality condition of the carrier frequency band.
  • communication device 700 can include a memory 710 and a processor 720 for storing executable instructions.
  • the processor 720 may perform the following operations according to the executable instructions stored in the memory 710: receiving pilot signals and data from each of multiple carrier frequency bands of the power line, wherein the multiple carrier frequency bands are mutually discrete; a level value of the pilot signal received from each of the plurality of carrier frequency bands; and, based on the calculated level value of the pilot signal received from each of the plurality of carrier frequency bands, Automatic gain control is performed on data received by each of the plurality of carrier frequency bands.
  • the data received on each of the multiple carrier frequency bands may belong to different services.
  • a modulation method employed for data received on each of the plurality of carrier frequency bands is determined based on a signal quality condition of the carrier frequency band.
  • Embodiments of the present invention also provide a machine readable medium having executable instructions stored thereon that, when executed, cause a machine to perform operations of processor 620 or 720. It will be understood by those skilled in the art that various modifications and changes may be made without departing from the spirit of the invention. Therefore, the scope of the invention should be defined by the appended claims.

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Quality & Reliability (AREA)
  • Power Engineering (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)

Abstract

本发明涉及一种用于经由电力线通信的方法和装置，该装置包括：发送模块，用于在电力线的多个载波频段的每一个上持续发送具有预定电平的引导信号，其中，所述多个载波频段是彼此离散的，例如被已占用的载波频段间隔开；以及，传送模块，用于在所述多个载波频段的每一个上发送例如同一用户的数据。利用该方法和装置，可以保障通信设备的通信质量要求。

Description

一种用于经由电力线通信的方法和装置
技术领域
本发明涉及电力线载波通信领域，尤其涉及一种用于经由电力线通信的方法和装置。 背景技术
电力线载波通信 (PLC: Power Line Carrier Communication)是以输电线路作为载波信 号的传输媒介的电力系统通信。 由于输电线路具备十分牢固的支撑结构， 并架设三条以 上的导体 (一般有三相良导体及一或两根架空地线)，所以输电线输送工频电流的同时，用 之传送载波信号， 既经济又十分可靠。 因此， 电力线载波通信已成为电力部门优先采用 的特有通信手段。
在现有的电力线载波通信方案中， 通信设备利用电力线的一个连续的载波频段来传 输各种业务的数据， 该连续的载波频段的带宽足以保障通信设备的通信质量要求。 图 1A 示出了连续的载波频段的一个例子。
然而， 随着利用电力线进行通信的通信设备增多， 会出现电力线在整个电力线可用 的通信频带中分布有一定数量的占用频段， 每个占用频段自身是一个连续的载波频段， 各个占用频段彼此是相互独立的。 由此， 整个电力线可用的通信频带的大部分同时被使 用。 在如此情况下， 如果某些通信设备仍然期望利用该电力线的某个具有指定带度 （或 带宽） 的连续载波频段来传输数据， 则电力线的未被占用的载波频段（如图 1B所示） 中 找不到一个不小于该制定带度的连续载波频段来供这些通信设备使用。 在这种情况下， 这些通信设备只能降低通信质量要求 （例如， 减少业务的数量和 /或降低数据速率）， 使 用电力线的一个连续的小于该指定带度的载波频段来通信。 发明内容
本发明实施例提供一种用于经由电力线通信的方法和装置， 其可以保障通信设备的 通信质量要求。
按照本发明实施例的一种用于经由电力线通信的方法， 包括： 在电力线的多个载波 频段的每一个上持续发送具有预定电平的引导信号， 其中， 所述多个载波频段是相互离 散的； 以及， 在所述多个载波频段的每一个上发送数据。
在一种具体实现方式中，在所述多个载波频段各自上发送的数据分别属于不同的业 务。
按照本发明实施例的一种用于经由电力线通信的方法， 包括： 从电力线的多个载波 频段的每一个接收引导信号和数据， 其中， 所述多个载波频段是相互离散的； 计算从所 述多个载波频段的每一个所接收的引导信号的电平值； 以及， 根据所计算的从所述多个 载波频段的每一个所接收的引导信号的电平值， 对从所述多个载波频段的每一个所接收 的数据执行自动增益控制。
在一种具体实现方式中，从所述多个载波频段各自所接收的数据分别属于不同的业 务。
按照本发明实施例的一种用于经由电力线通信的装置， 包括： 发送模块， 用于在电 力线的多个载波频段的每一个上持续发送具有预定电平的引导信号， 其中， 所述多个载 波频段是相互离散的； 以及， 传送模块， 用于在所述多个载波频段的每一个上发送数据。
在一种具体实现方式中，在所述多个载波频段各自上发送的数据分别属于不同的业 务。
按照本发明实施例的一种用于经由电力线通信的装置， 包括： 接收模块， 用于从电 力线的多个载波频段的每一个接收引导信号和数据， 其中， 所述多个载波频段是相互离 散的； 计算模块， 用于计算从所述多个载波频段的每一个所接收的引导信号的电平值； 以及， 增益控制模块， 用于根据所计算的从所述多个载波频段的每一个所接收的引导信 号的电平值， 对从所述多个载波频段的每一个所接收的数据执行自动增益控制。
在一种具体实现方式中，从所述多个载波频段各自所接收的数据分别属于不同的业 务。
从上面的描述可以看出， 本发明实施例的方案组合电力线的多个相互离散的载波频 段进行通信以满足通信所需的带宽要求， 并且在该多个相互离散的载波频段的每一个上 发送引导信号以使得作为接收方的通信设备能够基于在该多个载波频段的每一个上发送 的引导信号的电平值对从该多个载波频段的每一个所接收的数据进行增益控制以满足信 号水平要求， 因此， 与现有技术相比， 本发明实施例的方案能够保障通信设备的通信质 量要求。 附图说明
本发明的其它特征、 特点、 优点和益处通过以下结合附图的详细描述将变得更加显 而易见。
图 1A其示出了连续的载波频段的一个例子。
图 1B其示出了电力线的载波频段的示意图。
图 2示出了按照本发明一个实施例的电力线载波通信系统的示意图。
图 3示出了按照本发明一个实施例的用于经由电力线通信的方法的流程图。
图 4示出了按照本发明一个实施例的用于经由电力线通信的装置的示意图。
图 5示出了按照本发明另一实施例的用于经由电力线通信的装置的示意图。
图 6示出了按照本发明一个实施例的通信设备的示意图。
图 7示出了按照本发明另一实施例的通信设备的示意图。 具体实施方式
下面， 将结合附图详细本发明的各个实施例。
现在参见图 2，其示出了按照本发明一个实施例的电力线载波通信系统的示意图。如 图 2所示，电力线载波通信系统 100例如包括通信设备 110、通信设备 120、通信设备 130、 通信设备 140和连接各个通信设备的电力线 150。 其中， 通信设备 110、 通信设备 120、 通信设备 130和通信设备 140可以通过电力线 150相互通信。 这里， 一个通信设备发出 的数据可以视作为一个电力线通信用户的数据。 该用户数据可以包括单一业务， 也可以 包括不同的多种业务。
现在参见图 3。图 3示出了按照本发明一个实施例的用于经由电力线通信的方法的流 程图。 这里， 以通信设备 110经由电力线 150向通信设备 130发送数据为例来详细描述 本实施例的方法， 并且假设通信设备 110向通信设备 130发送数据所需的带宽为 K。
如图 3所示， 在步骤 S300， 如果电力线 150不存在一个未被使用的其带宽不小于 K 的载波频段， 则通信设备 110和通信设备 130获取电力线 150上未被占用的载波频段， 并从中选择多个载波频段 PD。其中， 该多个载波频段 PD的总带宽大于或等于 K。显然， 该多个载波频段 PD是相互离散的，例如该多个载波频段 PD相互之间被已占用的载波频 的间隔开。 该多个载波频段 PD 与已占用载波频段之间的间隔亦满足通信干扰要求。 在 本发明一个实施例中， 所述未被占用的载波频段可以为各个通信设备预先获知， 或者可 以通过检测电力线上的信号而获知。
在步骤 S304， 通信设备 110在电力线 150的该多个载波频段 PD的每一个上持续地 发送具有预定电平的引导信号。
在步骤 S308， 通信设备 110在电力线 150的该多个载波频段 PD的每一个上发送要 传输给通信设备 130的数据。 其中， 该数据可以例如是同一电力线通信用户的不同业务 数据。
在步骤 S312， 通信设备 130从电力线 150的该多个载波频段 PD的每一个接收通信 设备 110发送的引导信号和数据。 对于通信设备 130而言， 这些载波频段是预先已经获 知的。 如前所述， 通信设备 130可以预先被告知这些载波频段， 也可以通过检测电力线 上的信号而获知。
在步骤 S316， 通信设备 130计算从该多个载波频段 PD的每一个所接收的引导信号 的电平值。
在步骤 S320， 通信设备 130根据从该多个载波频段 PD的每一个所接收的引导信号 的电平值， 对从该多个载波频段 PD 的每一个所接收的数据执行自动增益控制， 以使得 数据的信号电平满足预定的信号电平要求。 在对所接收的数据执行自动增益控制之后， 通信设备 130可以进一步对所接收的数据进行后续处理， 例如解调制、 解码等。
从上面的描述可以看出， 本实施例的方案组合电力线 150的多个相互离散的载波频 段进行通信以满足通信所需的带宽要求， 并且在该多个相互离散的载波频段的每一个上 发送引导信号以使得作为接收方的通信设备 130能够基于在该多个载波频段的每一个上 发送的引导信号的电平值对从该多个载波频段的每一个所接收的数据进行自动增益控制 以满足信号水平要求， 因此， 本实施例的方案能够保障通信设备的通信质量要求。
本领域技术人员应当理解， 虽然在上面的实施例中， 电力线载波通信系统 100包括 四个通信设备， 然而， 本发明并不局限于此。 在本发明的其它一些实施例中， 电力线载 波通信系统 100所包括的通信设备的数目可以少于四个或多于四个。
本领域技术人员应当理解， 虽然在上面的实施例中， 在电力线 150不存在一个未被 使用的其带宽不小于 K的载波频段的情况下， 通信设备 110和通信设备 130才从电力线 150的各个未被使用的载波频段中选择多个载波频段进行通信，然而，本发明并不局限于 此。 在本发明的其它一些实施例中， 即使在电力线 150存在一个未被使用的其带宽不小 于 K的载波频段的情况下， 通信设备 110和通信设备 130也可以从电力线 150的各个未 被使用的载波频段中选择多个载波频段进行通信。
本领域技术人员应当理解，通信设备 110在该多个载波频段 PD各自上所发送的数据 可以属于不同的业务 （例如， 数字数据业务、 模拟语音业务、 模拟数字业务和保护信令 业务等）。 在这种情况下， 由于该多个载波频段 PD是相互离散的， 因此， 各个业务之间 的相互干扰被减少甚至消除。
本领域技术人员应当理解，通信设备 110也可以在该多个载波频段 PD的若干个载波 频段中同时发送同一业务的相同数据。 这样即使该若干个载波频段中的某些载波频段由 于干扰而无法工作， 作为接收方的通信设备 130也能从该若干个载波频段中的其它载波 频段接收该同一业务的该相同数据。 这里， 如果通信设备 130从两个或两个以上载波频 段接收到同一业务的多份相同数据， 则通信设备 130可以仅接受从信号质量状况最好的 载波频段所接收的那份数据作为接收数据， 或者， 可以把该多份相同数据进行加权求和 得到的数据作为接收数据。
本领域技术人员应当理解，在通信设备 110在电力线 150的该多个载波频段 PD的每 一个上发送数据之前，通信设备 110可以测量该多个载波频段 PD的每一个的信号质量状 况， 然后， 通信设备 110根据所测量的该多个载波频段 PD的每一个的信号质量状况， 使 用合适的调制方法来对将要在该多个载波频段 PD 的每一个上传输的数据进行调制， 最 后， 把调制后的数据在相应的载波频段上发送。 该合适的调制方法按照以下方式选择： 当载波频段的信号质量状况良好时使用能获得较高的有效数据传输速率的调制方法； 以 及， 当载波频段的信号质量状况较差时使用抗干扰能力较强的调制方法。 换言之， 在该 多个载波频段 PD的每一个载波频段 PD上发送的数据所采用的调制方法基于该载波频段 PDi的信号质量状况确定。
现在参见图 4，其示出了按照本发明一个实施例的用于经由电力线通信的装置的示意 图。 图 4所示的装置可以利用软件、 硬件 （例如集成电路或 FPGA等） 或软硬件结合的 方式来实现， 并且可以安装在作为发送方的通信设备中。
如图 4所示，用于经由电力线通信的装置 400可以包括发送模块 410和传送模块 420。 其中， 发送模块 410可以用于在电力线的多个载波频段的每一个上持续发送具有预定电 平的引导信号， 其中， 所述多个载波频段是相互离散的。 传送模块 420可以用于在所述 多个载波频段的每一个上发送数据。
其中， 在所述多个载波频段各自上所发送的数据可以分别属于不同的业务。
其中， 在所述多个载波频段的每一个上所发送的数据所采用的调制方法基于该载波 频段的信号质量状况确定。
其中， 在所述多个载波频段的若干个载波频段中所发送的数据可以是同一业务的相 同数据。 现在参见图 5，其示出了按照本发明另一实施例的用于经由电力线通信的装置的示意 图。 图 5所示的装置可以利用软件、 硬件 （例如集成电路或 FPGA等） 或软硬件结合的 方式来实现， 并且可以安装在作为接收方的通信设备中。 如图 5所示， 用于经由电力线通信的装置 500可以包括接收模块 510、 计算模块 520 和增益控制模块 530。其中，接收模块 510可以用于从电力线的多个载波频段的每一个接 收引导信号和数据， 其中， 所述多个载波频段是相互离散的。 计算模块 520可以用于计 算从所述多个载波频段的每一个所接收的引导信号的电平值。 增益控制模块 530可以用 于根据所计算的从所述多个载波频段的每一个所接收的引导信号的电平值， 对从所述多 个载波频段的每一个所接收的数据执行自动增益控制。
其中， 在所述多个载波频段各自上所接收的数据可以分别属于不同的业务。
其中， 在所述多个载波频段的每一个上所接收的数据所采用的调制方法基于该载波 频段的信号质量状况确定。
其中， 在所述多个载波频段的至少一个载波频段中所接收的数据可以是同一业务的 相同数据。
现在参见图 6， 其示出了按照本发明一个实施例的通信设备的示意图。 如图 6所示， 通信设备 600可以包括用于存储可执行指令的存储器 610和处理器 620。
其中， 处理器 620可以根据存储器 610所存储的可执行指令， 执行以下操作： 在电 力线的多个载波频段的每一个上持续发送具有预定电平的引导信号， 其中， 所述多个载 波频段是相互离散的； 以及， 在所述多个载波频段的每一个上发送数据。
其中， 在所述多个载波频段各自上所发送的数据可以分别属于不同的业务。
其中， 在所述多个载波频段的每一个上所发送的数据所采用的调制方法基于该载波 频段的信号质量状况确定。
现在参见图 7， 其示出了按照本发明一个实施例的通信设备的示意图。 如图 7所示， 通信设备 700可以包括用于存储可执行指令的存储器 710和处理器 720。
其中， 处理器 720可以根据存储器 710所存储的可执行指令， 执行以下操作： 从电 力线的多个载波频段的每一个接收引导信号和数据， 其中， 所述多个载波频段是相互离 散的； 计算从所述多个载波频段的每一个所接收的引导信号的电平值； 以及， 根据所计 算的从所述多个载波频段的每一个所接收的引导信号的电平值， 对从所述多个载波频段 的每一个所接收的数据执行自动增益控制。
其中， 在所述多个载波频段各自上所接收的数据可以分别属于不同的业务。
其中， 在所述多个载波频段的每一个上所接收的数据所采用的调制方法基于该载波 频段的信号质量状况确定。
本发明实施例还提供一种机器可读介质， 其上存储可执行指令， 当该可执行指令被 执行时， 使得机器实现处理器 620或 720的操作。 本领域技术人员应当理解， 上面公开的各个实施例可以在不偏离发明实质的情况下 做出各种变形和修改。 因此， 本发明的保护范围应当由所附的权利要求书来限定。

Claims

权 利 要 求 书
1、 一种用于经由电力线通信的方法， 包括：
获得电力线上的未占用的多个载波频段， 其中所述多个载波频段彼此离散的； 在所述多个载波频段的每一个上持续发送具有预定电平的引导信号； 以及 在所述多个载波频段的每一个上发送数据，其中所述数据为同一电力线通信用户的 数据。
2、 如权利要求 1所述的方法， 其中
在所述多个载波频段各自上发送的数据分别属于同一电力线通信用户的不同的业 务。
3、 如权利要求 1所述的方法， 其中
在所述多个载波频段中的至少两个载波频段上发送的数据彼此相同。
4、 如权利要求 1所述的方法， 其中， 在所述多个载波频段的每一个上所发送的数 据所采用的调制方法基于该载波频段的信号质量状况确定。
5、 一种用于经由电力线通信的方法， 包括：
获取电力线上用于传送同一用户的数据的多个载波频段，其中所述多个载波频段彼 此离散的；
从电力线上的所述多个载波频段的每一个上接收引导信号和数据；
计算从所述多个载波频段的每一个所接收的引导信号的电平值； 以及
根据所计算的从所述多个载波频段的每一个所接收的引导信号的电平值，对从所述 多个载波频段的每一个所接收的数据执行自动增益控制。
6、 如权利要求 5所述的方法， 其中
从所述多个载波频段各自所接收的数据分别属于同一用户的不同业务。
7、 如权利要求 5所述的方法， 其中
在所述多个载波频段中的至少两个载波频段上发送的数据彼此相同，
且该方法还包括：
基于从所述至少两个载波频段上获取的信号， 得到的所需的数据。
8、 如权利要求 1或 5所述的方法， 其中
所述多个载波频段是被已占用的载波频的间隔开的。
9、 一种用于经由电力线通信的装置， 包括： 发送模块，用于在电力线的多个载波频段的每一个上持续发送具有预定电平的引导 信号， 其中， 所述多个载波频段是预先获得的彼此离散的载波频段， 以及
传送模块， 用于在所述多个载波频段的每一个上发送数据， 其中所述数据为同一电 力线通信用户的数据。
10、 如权利要求 9所述的装置， 其中
在所述多个载波频段各自上发送的数据分别属于同一用户的不同的业务。
11、 如权利要求 9所述的装置， 其中
在所述多个载波频段中至少两个载波频段上发送的数据彼此相同。
12、 一种用于经由电力线通信的装置， 包括：
接收模块， 用于从电力线的多个载波频段的每一个接收引导信号和数据， 其中， 所 述多个载波频段是预先获得的彼此离散的载波频段；
计算模块， 用于计算从所述多个载波频段的每一个所接收的引导信号的电平值； 以 及
增益控制模块，用于根据所计算的从所述多个载波频段的每一个所接收的引导信号 的电平值， 对从所述多个载波频段的每一个所接收的数据执行自动增益控制。
13、 如权利要求 12所述的装置， 其中
从所述多个载波频段各自所接收的数据分别属于不同的业务。
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