JP2008252551A - Power line communication quality evaluation method and power line communication system - Google Patents

Power line communication quality evaluation method and power line communication system Download PDF

Info

Publication number
JP2008252551A
JP2008252551A JP2007091602A JP2007091602A JP2008252551A JP 2008252551 A JP2008252551 A JP 2008252551A JP 2007091602 A JP2007091602 A JP 2007091602A JP 2007091602 A JP2007091602 A JP 2007091602A JP 2008252551 A JP2008252551 A JP 2008252551A
Authority
JP
Japan
Prior art keywords
power line
data
line communication
node
communication
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP2007091602A
Other languages
Japanese (ja)
Other versions
JP4367788B2 (en
Inventor
Tokuki Hamabe
徳樹 浜辺
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SMK Corp
Original Assignee
SMK Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by SMK Corp filed Critical SMK Corp
Priority to JP2007091602A priority Critical patent/JP4367788B2/en
Publication of JP2008252551A publication Critical patent/JP2008252551A/en
Application granted granted Critical
Publication of JP4367788B2 publication Critical patent/JP4367788B2/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Landscapes

  • Small-Scale Networks (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a power line communication evaluation method and a power line communication system, with which communication quality is simply evaluated, and evaluation results is easily shared among a plurality of nodes in power line communication. <P>SOLUTION: The power line communication system is constituted of the plurality nodes 12, 14, 16, 18 connected to a power line 10, transmits data from one node 12 and in that case, transmits the data by attaching information indicating n-th transmission of the data. Each of the nodes 12, 14, 16, 18 connected to the power line 10 is provided with a reception confirmation signal circuit 28 and a transmitting circuit 24, which receive the data from one node 12 to transmit its reception confirmation signal. The reception confirmation signal circuit 28 transmits the number of transmissions and information indicating a transmitted data amount together. Each of the nodes 14, 16, 18 for performing the power line communication is provided with a communication quality evaluation circuit 26 which evaluates the communication quality of the power line communication on the basis of a value obtained by receiving the number of transmissions and the data amount of the reception confirmation signal and dividing the data amount by the number of transmissions. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

この発明は、電源に接続され電子機器に電力を供給する電力線を用いて、各電子機器間での通信を行う電力線通信の通信品質評価方法と電力線通信システムに関する。   The present invention relates to a communication quality evaluation method and a power line communication system of power line communication for performing communication between electronic devices using a power line connected to a power source and supplying power to the electronic device.

従来、屋内に敷設された電力線を伝送媒体として利用する電力線通信システムが知られている。電力線通信の場合、既設の電力線を使用するため、電子機器間の通信用専用線を設ける必要がない。そのため、新たにネットワーク機器などを導入する場合や、通信機器の配置を移動する場合にも配線の追加や変更が必要ないものである。従来の屋内商用電力線を使用して電力線通信を行うシステムでは、交流電源に接続された電力線に専用のＰＬＣ（Power Line Communication）装置を接続し、このＰＬＣ装置を介して、電力線に重畳された通信信号の授受を行っていた。   Conventionally, a power line communication system that uses a power line laid indoors as a transmission medium is known. In the case of power line communication, since an existing power line is used, it is not necessary to provide a dedicated line for communication between electronic devices. Therefore, it is not necessary to add or change wiring even when newly introducing a network device or the like or moving the arrangement of communication devices. In a system for performing power line communication using a conventional indoor commercial power line, a dedicated PLC (Power Line Communication) device is connected to the power line connected to the AC power source, and communication superimposed on the power line is performed via this PLC device. It was sending and receiving signals.

電力線通信は、図３に示すように、電力線１に接続されたコンピュータ等の複数の通信機器のノード２，３間で信号を授受している。電力線通信は、電力を送る配線である電力線１を利用してコンピュータ等の複数の通信機器のノード２，３間で通信しているため、信号にノイズが混ざりやすく、通信品質が問題であった。従って、送信側のノード２は、複数回の送信後に受信確認信号ＡＣＫを得ることが多い。また、図４に示すように、電力線通信においては、送信するデータ量、即ちパケットの長さが長いほど、送信を失敗する確率が高く、再送を繰り返しやすい。   In power line communication, as shown in FIG. 3, signals are exchanged between nodes 2 and 3 of a plurality of communication devices such as computers connected to the power line 1. In power line communication, communication is performed between the nodes 2 and 3 of a plurality of communication devices such as computers by using the power line 1 which is a wiring for transmitting power, so that noise is easily mixed in the signal and communication quality is a problem. . Therefore, the transmission-side node 2 often obtains the reception confirmation signal ACK after a plurality of transmissions. Also, as shown in FIG. 4, in power line communication, the longer the amount of data to be transmitted, that is, the longer the packet length, the higher the probability of transmission failure and the easier it is to repeat retransmission.

ここで、通信品質を評価する指標として、スループット（throughput）と称される指数がある。スループットとは、通信路について、プロトコルのオーバーヘッドなどを除いた、正味の通信速度（ｂｐｓ）で表されるもので、電力線通信のみならず、種々の通信品質の評価に利用されている。   Here, there is an index called throughput as an index for evaluating communication quality. Throughput is represented by the net communication speed (bps) of a communication path, excluding protocol overhead, and is used not only for power line communication but also for evaluating various communication qualities.

スループットを測定するには、電力線１に接続されたコンピュータ等の複数の通信機器のノード２，３間において、一方のノード２からデータを送信し他方のノード３がそのデータを受信した旨の受信確認信号（ＡＣＫ）を送信する。そして、データを送信した一方のノード２で、送信から受信までの時間と送信したデータ量をパラメータとしてスループットを計算している。   In order to measure the throughput, data is transmitted from one node 2 between nodes 2 and 3 of a plurality of communication devices such as computers connected to the power line 1, and reception that the other node 3 has received the data. An acknowledgment signal (ACK) is transmitted. The one node 2 that has transmitted the data calculates the throughput using the time from transmission to reception and the amount of transmitted data as parameters.

その他、電力線通信の伝送路の品質評価方法としては、特許文献1に開示されているように、通信機器間で複数の通信方式によりテストパターンを送信し、電力線を含む通信の通信品質を測定しているものがある。また、特許文献２に開示されているように、伝送路のＳ／Ｎ比を測定して通信品質を評価するものもある。さらに、特許文献３に開示されているように、交流の電力線にビーコン信号を重畳して、伝送路の通信品質を評価する通信方式も提案されている。
特開２００１−１３６１７３号公報 特開２００４−２３３１１号公報 特開２００７−３７１５４号公報 In addition, as a method for evaluating the quality of a transmission line for power line communication, as disclosed in Patent Document 1, a test pattern is transmitted between communication devices using a plurality of communication methods, and the communication quality of communication including the power line is measured. There is something that is. In addition, as disclosed in Patent Document 2, there is an apparatus that measures the S / N ratio of a transmission path to evaluate communication quality. Furthermore, as disclosed in Patent Document 3, a communication method has also been proposed in which a beacon signal is superimposed on an AC power line to evaluate the communication quality of the transmission path.
JP 2001-136173 A JP 200423311 A JP 2007-37154 A

上記従来の技術の通信品質評価方法は、通信品質を簡易に測定できるものではなく、各従来技術の場合それぞれ特別の装置やプログラムを必要としている。また、今日のデータ通信においては、高周波化により複数のノード間で測定タイミングを合わせることは極めて難しく、ネットワーク内の複数のノード間で、リアルタイムで通信品質を共有することは難しいものである。また、一方のノードでの評価結果を他のノードへ送信することは可能であるが、別途送信プログラム等を必要とし、システムが複雑になるものである。   The conventional communication quality evaluation method of the above prior art cannot easily measure the communication quality, and each conventional technique requires a special device or program. In today's data communication, it is extremely difficult to match the measurement timing between a plurality of nodes due to high frequency, and it is difficult to share communication quality in real time between a plurality of nodes in a network. In addition, although it is possible to transmit the evaluation result at one node to another node, a separate transmission program is required, and the system becomes complicated.

この発明は、上記背景技術に鑑みて成されたもので、電力線通信において簡易に通信品質を評価することができ、評価結果を複数のノードで簡単に共有可能な電力線通信品質評価方法と電力線通信システムを提供することを目的とする。   The present invention has been made in view of the above-described background art. A power line communication quality evaluation method and a power line communication which can easily evaluate communication quality in power line communication and can easily share an evaluation result among a plurality of nodes. The purpose is to provide a system.

この発明は、電力線を介して信号を通信する電力線通信の通信品質評価方法であって、一方のノードからデータを送信し、その際前記データの何回目の送信かを示す情報を添付して送信し、他方のノードが前記一方のノードからのデータを受信してその受信確認信号を送信する際に、前記送信回数と前記送信されたデータ量を示す情報を合わせて送信し、前記電力線通信を行うネットワークの各ノードでは、前記受信確認信号の前記送信回数とデータ量を受信して、前記データ量を前記送信回数で割った値を基にして、その電力線通信の通信品質を評価する電力線通信品質評価方法である。   The present invention relates to a communication quality evaluation method for power line communication in which a signal is communicated via a power line, wherein data is transmitted from one node, and information indicating how many times the data is transmitted is attached at that time. When the other node receives the data from the one node and transmits the reception confirmation signal, the information indicating the number of transmissions and the amount of data transmitted is transmitted together, and the power line communication is performed. Each node of the network to perform the power line communication that receives the transmission count and the data amount of the reception confirmation signal and evaluates the communication quality of the power line communication based on the value obtained by dividing the data amount by the transmission count Quality evaluation method.

またこの発明は、電力線を介して信号を通信するネットワークの電力線通信システムであって、電力線に接続された複数のノードから成り、一方のノードからデータを送信し、その際前記データの何回目の送信かを示す情報を添付して送信し、前記電力線に接続された各ノードは、前記一方のノードからのデータを受信してその受信確認信号を送信する受信確認信号回路と送信回路を備え、この受信確認信号回路は、前記受信確認信号を送信する際に前記送信回数と前記送信されたデータ量を示す情報を合わせて送信し、前記電力線通信を行う各ノードでは、前記受信確認信号の前記送信回数とデータ量を受信して前記データ量を前記送信回数で割った値を基にして、その電力線通信の通信品質を評価する通信品質評価回路を備えた電力線通信電力線通信システムである。   The present invention is also a power line communication system of a network for communicating signals via a power line, comprising a plurality of nodes connected to the power line, transmitting data from one node, and at that time Each node connected to the power line is provided with a reception confirmation signal circuit and a transmission circuit for receiving data from the one node and transmitting the reception confirmation signal. The reception confirmation signal circuit transmits the reception confirmation signal together with information indicating the number of transmissions and the amount of transmitted data, and each node performing the power line communication transmits the reception confirmation signal. Based on a value obtained by receiving the number of transmissions and the amount of data and dividing the amount of data by the number of transmissions, a power line communication circuit is provided with a communication quality evaluation circuit that evaluates the communication quality of the power line communication. A power line communication system.

この発明の電力線通信評価方法と電力線通信システムによれば、簡単に電力線通信の通信品質を評価することができ、簡単な装置で、ネットワークに接続された各通信機器間でその評価結果を共有することができる。   According to the power line communication evaluation method and the power line communication system of the present invention, the communication quality of power line communication can be easily evaluated, and the evaluation result is shared between communication devices connected to the network with a simple device. be able to.

以下、この発明の電力線通信品質評価方法と電力線通信システムの一実施形態について、図１、図２を基にして説明する。この実施形態の電力線通信システムは、例えば交流の商用電力線１０を介して信号を通信するもので、電力線１０に接続された複数のコンピュータや電子機器等のノード１２，１４，１６，１８から成るネットワークが形成されている。   Hereinafter, an embodiment of a power line communication quality evaluation method and a power line communication system according to the present invention will be described with reference to FIGS. The power line communication system of this embodiment communicates signals via, for example, an AC commercial power line 10, and is a network composed of nodes 12, 14, 16, 18 such as a plurality of computers and electronic devices connected to the power line 10. Is formed.

この電力線通信システムの各ノード１２，１４，１６，１８は、図２に示すように、電力線通信に用いるＰＬＣ装置２０を備えている。各ＰＬＣ装置２０には、電力線１０に乗せられた信号を受信する受信回路２２と、電力線１０へそのコンピュータのＣＰＵ等からの信号を送信する送信回路２４を備えている。さらに、ＰＬＣ装置２０には、受信回路２２が受信した信号が何回目の送信かを示すデータと、受信した信号のデータ量（パケット長）を認識する通信品質評価回路２６を備えている。通信品質評価回路２６は、後述するように評価結果を、受信確認信号回路２８からの受信確認信号ＡＣＫとともに送信回路２４へ送る。   Each node 12, 14, 16, 18 of this power line communication system is provided with a PLC device 20 used for power line communication, as shown in FIG. Each PLC device 20 includes a receiving circuit 22 that receives a signal placed on the power line 10 and a transmitting circuit 24 that transmits a signal from the CPU of the computer to the power line 10. Furthermore, the PLC device 20 includes a communication quality evaluation circuit 26 that recognizes data indicating how many times the signal received by the receiving circuit 22 is transmitted and the data amount (packet length) of the received signal. The communication quality evaluation circuit 26 sends the evaluation result to the transmission circuit 24 together with the reception confirmation signal ACK from the reception confirmation signal circuit 28 as will be described later.

ここで、この発明の通信品質評価方法の考え方について説明する。電力線通信は一般に伝送路の品質が悪く、送信に失敗しやすいことから、再送回数が多くなりがちである。また、送信に際して、１回当たりのパケット長が長い（データ量が多い）ほど、伝送に失敗する可能性も高く、再送になりやすいものである。これより、データ量と送信回数が通信品質のパラメータとして用いることができることが分かる。この発明では、この点に着目して、送信するデータの送信回数ｎとデータ量Ｌを基にして、データ量Ｌを送信回数ｎで割ったＬ／ｎの値により通信品質を評価するものである。   Here, the concept of the communication quality evaluation method of the present invention will be described. In power line communication, the quality of the transmission path is generally poor, and transmission tends to fail, so the number of retransmissions tends to increase. Further, in transmission, the longer the packet length per transmission (the larger the amount of data), the higher the possibility of transmission failure and the more likely it is to retransmit. This shows that the data amount and the number of transmissions can be used as parameters of communication quality. In the present invention, paying attention to this point, the communication quality is evaluated by the value of L / n obtained by dividing the data amount L by the transmission number n based on the transmission number n and the data amount L of the data to be transmitted. is there.

この実施形態の電力線通信品質評価方法は、図１に示すように、例えばノード１２からデータをノード１４へ送信し、その際、データの送信回数の情報も添付して送信する。データの送信回数は、そのデータの再送回数でも良い。受信する側のノード１４は、ノード１２からのデータを受信して、その受信確認信号ＡＣＫを送信する。その際に、送信回数ｎと送信されたデータ量Ｌを示す情報を合わせて送信する。   In the power line communication quality evaluation method of this embodiment, as shown in FIG. 1, for example, data is transmitted from the node 12 to the node 14, and at that time, information on the number of times of data transmission is also transmitted. The number of data transmissions may be the number of retransmissions of the data. The receiving node 14 receives the data from the node 12 and transmits the reception confirmation signal ACK. At that time, the information indicating the number of times of transmission n and the amount of transmitted data L is transmitted together.

電力線通信を行う各ノード１２，１６，１８では、受信確認信号ＡＣＫとともに送信回数ｎとデータ量Ｌを受信して、通信品質評価回路２６でデータ量Ｌを送信回数ｎで割って、その電力線通信の通信品質を求める。ここで求める通信品質は、Ｌ／ｎそのものの値でも良いが、複数の段階に分けた指標でも良い。この受信確認信号ＡＣＫは、そのネットワーク内の他のノード１２，１６，１８で受信されるので、通信を行ったノード１２，１４以外のノード１６，１８もそのときの通信状態を、各ノード１６，１８内の通信品質評価回路２６で求めることができる。   Each node 12, 16, 18 that performs power line communication receives the number of transmissions n and the data amount L together with the reception confirmation signal ACK, and the communication quality evaluation circuit 26 divides the data amount L by the number of transmissions n, and the power line communication is performed. Request communication quality. The communication quality required here may be the value of L / n itself, but may be an index divided into a plurality of stages. Since this reception confirmation signal ACK is received by the other nodes 12, 16, and 18 in the network, the nodes 16 and 18 other than the nodes 12 and 14 with which the communication has been performed also indicate the communication state at that time to each node 16. , 18 in the communication quality evaluation circuit 26.

この実施形態の電力線通信品質評価方法と電力線通信システムによれば、受信確認信号ＡＣＫに送信回数（再送回数）を追加するだけで、簡単にそのネットワーク内の各ノード１２，１４，１６，１８は、そのときの通信状態をおおよそ把握し評価することができる。これにより、例えば、ネットワーク内の通信品質の善し悪しにより、送信データの圧縮率を変えたり、その他送信データのボリュームを可変にした通信が可能となる。これにより、通信の失敗によるデータの欠落を無くし、通信状態が悪い場合も、情報が完全に欠落せずにおおよその情報が届くようにネットワークを構築することができる。   According to the power line communication quality evaluation method and the power line communication system of this embodiment, each node 12, 14, 16, 18 in the network can be easily added by simply adding the number of transmissions (number of retransmissions) to the reception confirmation signal ACK. It is possible to roughly grasp and evaluate the communication state at that time. Thereby, for example, it is possible to perform communication by changing the compression rate of transmission data or changing the volume of other transmission data depending on the quality of communication in the network. This eliminates data loss due to communication failure, and even when the communication state is poor, it is possible to construct a network so that approximate information can arrive without information being completely lost.

なお、この発明の電力線通信システムは上記実施形態に限定されるものではなく、種々の電力線通信システムに利用可能なものであり、直流電力線においても利用可能である。   In addition, the power line communication system of this invention is not limited to the said embodiment, It can utilize for a various power line communication system, It can utilize also in a DC power line.

この発明の一実施形態の電力線通信システムの電力線通信品質評価方法を示す模式図である。It is a schematic diagram which shows the power line communication quality evaluation method of the power line communication system of one Embodiment of this invention. この実施形態の電力線通信システムのＰＬＣ装置を示す概略ブロック図である。It is a schematic block diagram which shows the PLC apparatus of the power line communication system of this embodiment. 従来の電力線通信システムを示す模式図である。It is a schematic diagram which shows the conventional power line communication system. 従来の電力線通信システムにおけるデータ量の違いによる通信を示す模式図である。It is a schematic diagram which shows the communication by the difference in the data amount in the conventional power line communication system.

符号の説明Explanation of symbols

１０ 電力線
１２，１４，１６，１８ ノード
２０ ＰＬＣ装置
２２ 受信回路
２４ 送信回路
２６ 通信品質評価回路
２８ 受信確認信号回路 DESCRIPTION OF SYMBOLS 10 Power line 12, 14, 16, 18 Node 20 PLC apparatus 22 Reception circuit 24 Transmission circuit 26 Communication quality evaluation circuit 28 Reception confirmation signal circuit

Claims (2)

電力線を介して信号を通信する電力線通信の通信品質評価方法において、一方のノードからデータを送信し、その際前記データの何回目の送信かを示す情報を添付して送信し、他方のノードが前記一方のノードからのデータを受信してその受信確認信号を送信する際に、前記送信回数と前記送信されたデータ量を示す情報を合わせて送信し、前記電力線通信を行うネットワークの各ノードでは、前記受信確認信号の前記送信回数とデータ量を受信して、前記データ量を前記送信回数で割った値を基にして、その電力線通信の通信品質を評価することを特徴とする電力線通信品質評価方法。   In a communication quality evaluation method for power line communication in which a signal is communicated via a power line, data is transmitted from one node, and information indicating how many times the data is transmitted is attached, and the other node transmits When receiving data from the one node and transmitting the reception confirmation signal, the information indicating the number of transmissions and the amount of data transmitted is transmitted together, and each node of the network performing the power line communication Receiving the number of transmissions of the reception confirmation signal and the amount of data, and evaluating the communication quality of the power line communication based on a value obtained by dividing the data amount by the number of transmissions Evaluation methods. 電力線を介して信号を通信するネットワークの電力線通信システムにおいて、電力線に接続された複数のノードから成り、一方のノードからデータを送信し、その際前記データの何回目の送信かを示す情報を添付して送信し、前記電力線に接続された各ノードは、前記一方のノードからのデータを受信してその受信確認信号を送信する受信確認信号回路と送信回路を備え、この受信確認信号回路は、前記受信確認信号を送信する際に前記送信回数と前記送信されたデータ量を示す情報を合わせて送信し、前記電力線通信を行う各ノードでは、前記受信確認信号の前記送信回数とデータ量を受信して前記データ量を前記送信回数で割った値を基にして、その電力線通信の通信品質を評価する通信品質評価回路を備えたことを特徴とする電力線通信電力線通信システム。

In a power line communication system of a network that communicates signals via a power line, it consists of a plurality of nodes connected to the power line, transmits data from one node, and attaches information indicating how many times the data is transmitted at that time Each node connected to the power line includes a reception confirmation signal circuit and a transmission circuit that receive data from the one node and transmit the reception confirmation signal. When transmitting the reception confirmation signal, the number of transmissions and the information indicating the amount of transmitted data are transmitted together, and each node performing the power line communication receives the number of transmissions and the amount of data of the reception confirmation signal. And a communication quality evaluation circuit for evaluating communication quality of the power line communication based on a value obtained by dividing the data amount by the number of transmissions. Power line communication system.

JP2007091602A 2007-03-30 2007-03-30 Power line communication quality evaluation method and power line communication system Expired - Fee Related JP4367788B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2007091602A JP4367788B2 (en) 2007-03-30 2007-03-30 Power line communication quality evaluation method and power line communication system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2007091602A JP4367788B2 (en) 2007-03-30 2007-03-30 Power line communication quality evaluation method and power line communication system

Publications (2)

Publication Number Publication Date
JP2008252551A true JP2008252551A (en) 2008-10-16
JP4367788B2 JP4367788B2 (en) 2009-11-18

Family

ID=39976970

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2007091602A Expired - Fee Related JP4367788B2 (en) 2007-03-30 2007-03-30 Power line communication quality evaluation method and power line communication system

Country Status (1)

Country Link
JP (1) JP4367788B2 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103761856A (en) * 2014-02-20 2014-04-30 国网上海市电力公司 Data monitoring collector
JP2015528241A (en) * 2012-07-13 2015-09-24 アダプティブ スペクトラム アンド シグナル アラインメント インコーポレイテッド Method and system for measuring communication line performance
JP2018157501A (en) * 2017-03-21 2018-10-04 Ｎｅｃプラットフォームズ株式会社 Monitoring system, monitor, monitoring method and program
CN112307003A (en) * 2020-11-02 2021-02-02 合肥优尔电子科技有限公司 Power grid data multidimensional auxiliary analysis method, system, terminal and readable storage medium

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2015528241A (en) * 2012-07-13 2015-09-24 アダプティブ スペクトラム アンド シグナル アラインメント インコーポレイテッド Method and system for measuring communication line performance
US10484261B2 (en) 2012-07-13 2019-11-19 Assia Spe, Llc Method and system for performance measurement of a communication link
CN103761856A (en) * 2014-02-20 2014-04-30 国网上海市电力公司 Data monitoring collector
JP2018157501A (en) * 2017-03-21 2018-10-04 Ｎｅｃプラットフォームズ株式会社 Monitoring system, monitor, monitoring method and program
CN112307003A (en) * 2020-11-02 2021-02-02 合肥优尔电子科技有限公司 Power grid data multidimensional auxiliary analysis method, system, terminal and readable storage medium
CN112307003B (en) * 2020-11-02 2022-09-09 合肥优尔电子科技有限公司 Power grid data multidimensional auxiliary analysis method, system, terminal and readable storage medium

Also Published As

Publication number Publication date
JP4367788B2 (en) 2009-11-18

Similar Documents

Publication Publication Date Title
KR101370553B1 (en) System, Mobile Communication Unit and Method for Testing a Receiver Performance
JP2007096960A5 (en)
WO2009124235A3 (en) Methods and apparatus for delayed block acknowledgement in a wireless local area network (wlan)
HK1111015A1 (en) Bulk data transfer
RU2008120630A (en) CONFIRMATION OF RELATIONSHIP USING FOUR FOUR WAYS FOR SUSTAINABLE CHANNEL ASSESSMENT AND PREDICTION OF SPEED
ATE424677T1 (en) METHOD AND SYSTEM FOR DATA COMMUNICATION AND STATION FOR DATA TRANSMISSION
RU2010112726A (en) REPEAT SIGNAL TRANSMISSIONS IN COMMUNICATION SYSTEMS
JP2013255235A5 (en)
JP2013501441A5 (en) Channel quality information report method, terminal device and integrated circuit
RU2010142904A (en) CO-OPERATIONAL COMMUNICATION METHODS
RU2009136225A (en) METHOD FOR REPORTING CHANNEL QUALITY INFORMATION, BASE STATION AND USER TERMINAL
DE602007001299D1 (en) Method and apparatus for sending and receiving a status message in a mobile communication system
RU2014142903A (en) METHOD AND EQUIPMENT USED TO ENSURE COMMUNICATION BETWEEN DEVICES
WO2012002705A3 (en) Method and apparatus for transmitting data frame in wlan system
JP2008252955A5 (en)
WO2007133890B1 (en) System, method and apparatus for determining if data arrived properly in tdm network
ATE358867T1 (en) COMMUNICATION DEVICE AND METHOD FOR RECEIVING AND TRANSMITTING MUSIC SOUND CONTROL DATA OVER THE INTERNET.
TW201448503A (en) Digital radio communication
MX2009010385A (en) Apparatus and method for transmitting data and apparatus and method for receiving data.
JP2012515499A5 (en)
TWI466564B (en) Apparatus and method for adjusting transmission power of communication system
JP4367788B2 (en) Power line communication quality evaluation method and power line communication system
MX2010002948A (en) A method of performing polling procedure in a wireless communication system.
CN102904772A (en) Method and device for realizing throughput test of network equipment
JP2014099859A5 (en)

Legal Events

Date Code Title Description
A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20090807

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20090819

A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20090820

R150 Certificate of patent or registration of utility model

Free format text: JAPANESE INTERMEDIATE CODE: R150

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20120904

Year of fee payment: 3

LAPS Cancellation because of no payment of annual fees