WO2011145540A1 - 無線通信装置及び無線通信方法 - Google Patents
無線通信装置及び無線通信方法 Download PDFInfo
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- WO2011145540A1 WO2011145540A1 PCT/JP2011/061135 JP2011061135W WO2011145540A1 WO 2011145540 A1 WO2011145540 A1 WO 2011145540A1 JP 2011061135 W JP2011061135 W JP 2011061135W WO 2011145540 A1 WO2011145540 A1 WO 2011145540A1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
- H04L41/06—Management of faults, events, alarms or notifications
- H04L41/0654—Management of faults, events, alarms or notifications using network fault recovery
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/74—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission for increasing reliability, e.g. using redundant or spare channels or apparatus
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
- H04L25/0264—Arrangements for coupling to transmission lines
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W84/00—Network topologies
- H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
- H04W84/10—Small scale networks; Flat hierarchical networks
- H04W84/12—WLAN [Wireless Local Area Networks]
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
- H04W24/08—Testing, supervising or monitoring using real traffic
Definitions
- the present invention relates to a wireless communication apparatus and a wireless communication method using a local area network (LAN).
- LAN local area network
- FIG. 2 shows a twin path configuration in a conventional wireless communication apparatus.
- a LAN Local Area Network
- Radio frame conversion section 103 branches the signal and outputs active main signal 106 and standby main signal 107 to active modulation / demodulation section 104 and standby modulation / demodulation section 105, respectively.
- the active system modulation / demodulation unit 104 and the standby system modulation / demodulation unit 105 transmit the active system main signal 106 and the standby system main signal 107 by wireless communication, respectively.
- the active main signal 207 and the standby main signal 208 demodulated by the active modem 202 and the standby modem 203 are input to the signal selection switch 204.
- the signal selection switch 204 selects the active main signal 207 and outputs it via the radio frame conversion unit 205 and the layer 2 switch 206.
- the signal selection switch 204 switches and outputs the standby main signal 208 so as to select it.
- Patent Document 1 discloses, as a prior art, a line multiplexing method for improving the availability of the entire network system without changing a device in which an existing line multiplexing technique is implemented.
- this line multiplexing method when a failure is detected, all the LAN lines belonging to the same group as the LAN line in which the failure has occurred are blocked, and the failure of the information relay apparatus and the line multiplexing unit in the terminal is detected. Prompt to use another LAN line that has not occurred, and continue communication.
- Japanese Patent Laid-Open No. 2004-228561 is a wireless communication system that sends a switching signal to a monitoring control panel of a master station to pause polling during switching in order to realize stable monitoring control even when switching between a working line and a protection line occurs.
- a communication system is disclosed. With this system, it is possible to eliminate a non-communication state until a time-out for waiting for a response from the slave station is detected, and it is possible to prevent the alarm notification from being lost to the master station and the loss of control response.
- the transmitting-side wireless communication device branches the same main signal and transmits it in two systems, and the receiving-side wireless communication device selects either one. . Therefore, the standby system in which the main signal is not selected occupies a frequency and outputs a radio signal, as in the active system, but there is a problem that it is not used as signal transmission and wastes frequency and power.
- the wireless communication apparatus of the adaptive modulation system when the radio band is reduced, the LAN transmission capacity is also reduced at the same time, and there is a problem that it becomes difficult to cope with a network having a large band.
- An example of an object of the present invention is to provide a wireless communication apparatus capable of securing LAN transmission capacity by operating a standby system as a signal transmission in the twin path configuration of a wireless communication apparatus, as in the active system, when there is no failure.
- a wireless communication method is provided.
- the wireless communication device of the present invention using the adaptive modulation system includes two transmission lines, an active transmission line and a standby transmission line, and line information indicating the line states of the active transmission line and the standby transmission line.
- the signal processing unit uses two transmission lines of the working transmission line and the standby transmission line. Set to perform wireless communication.
- the signal processing unit determines that a failure has occurred in either the active transmission line or the standby transmission line, no failure has occurred in the active transmission line or the standby transmission line. Set to perform wireless communication using only the transmission path.
- the wireless communication method of the present invention in a wireless communication apparatus using an adaptive modulation method is acquired by a line information acquisition step for acquiring line information indicating a line state of an active transmission line and a standby transmission line, and the line information acquisition step. And a signal processing step of determining whether a failure has occurred in the working transmission line and the standby transmission line based on the line information.
- a signal processing step when it is determined that no failure has occurred in the working transmission line and the standby transmission line, two paths of the working transmission line and the standby transmission line are used. Set to perform wireless communication.
- the signal processing step when it is determined that a failure has occurred in either the active transmission line or the standby transmission line, no failure has occurred in the active transmission line and the standby transmission line. Set to perform wireless communication using only the transmission path.
- the transmission capacity of a LAN is ensured twice that of the conventional system by using both the active system and the standby system for signal transmission. be able to.
- FIG. 1 is a block diagram showing the configuration of this embodiment.
- the wireless communication apparatus shown in FIG. 1 is a wireless communication apparatus using an adaptive modulation (Radio modulation) method.
- a case where a network is constructed using a LAN (Local Area Network) such as Ethernet (registered trademark) using this wireless communication apparatus will be described.
- FIG. 1 shows a wireless communication device 301 on the transmission side and a wireless communication device 401 on the reception side.
- the wireless communication apparatus 301 includes a signal processing unit 305 that processes a LAN signal, and two active system modulation / demodulation units 306 and a standby system modulation / demodulation unit 307 that perform modulation and demodulation and output reception line information.
- the wireless communication apparatus 401 includes a signal processing unit 409 that processes a LAN signal, and two active system modulation / demodulation units 402 and a standby system modulation / demodulation unit 403 that perform modulation and demodulation and output reception line information.
- the signal processing unit 305 includes a layer 2 switch 302, a radio frame conversion unit 303 corresponding to the active system modulation / demodulation unit 306, and a radio frame conversion unit 304 corresponding to the standby system modulation / demodulation unit 307.
- Radio frame converter 303 outputs active main signal 308 to active modulator / demodulator 306.
- the radio frame conversion unit 304 outputs a standby main signal 309 to the standby modulation / demodulation unit 307.
- the signal processing unit 409 includes a signal selection switch 404 that selects active and standby signals, and three systems of radio frame conversion units 405, 406, and 407.
- the working system modulation / demodulation unit 402 outputs the working system main signal 410 to the signal processing unit 401, that is, the signal selection switch 404 and the radio frame conversion unit 405.
- the standby modulation / demodulation unit 403 outputs the standby main signal 411 to the signal processing unit 401, that is, the signal selection switch 404 and the radio frame conversion unit 407.
- the wireless communication apparatus shown in FIG. 1 is used in a LAN by performing trunk setting using LACP (Link Aggregation Control Protocol) technology for both wireless communication paths when both the active system and the standby system are fault-free. Increase bandwidth.
- LACP Link Aggregation Control Protocol
- the signal processing unit 305 receives the working system line information 310 output from the working system modulation / demodulation unit 306 and the protection system line information 311 output from the protection system modulation / demodulation unit 307, and monitors the line states of the working system and the protection system. To do.
- the signal processing unit 305 also monitors the active and standby hardware failures. The signal processing unit 305 determines that wireless transmission by both the active system and the standby system is possible when there is no line failure and hardware failure in both the active system and the standby system.
- the signal processing unit 305 performs trunk setting for both ports where the layer 2 switch 302 is connected to the radio frame conversion units 303 and 304.
- the transmission capacity of the wireless communication apparatus 301 on the transmission side can be doubled compared to when the standby system is not used.
- the signal processing unit 305 operates only on a transmission path without a failure by closing the port on which the failure has occurred.
- the signal processing unit 409 receives the working system line information 412 output from the working system modulation / demodulation unit 402 and the protection system line information 413 output from the standby system modulation / demodulation unit 403, and determines the line status of each of the working system and the protection system. Monitor.
- the layer 2 switch 408 performs trunk setting for the ports connected to the radio frame conversion units 405 and 407, and performs radio frame conversion after the signal selection switch 404. The connection port with the unit 406 is blocked.
- the layer 2 switch 408 closes the port connected to the radio frame conversion units 405 and 407 and sets the connection port to the radio frame conversion unit 406. Open.
- the signal selection switch 404 selects a transmission path in which no line failure has occurred.
- the standby line having different frequency is installed in the wireless section and the line is switched to the standby line when the line deteriorates or the hardware breaks down.
- it is used as signal transmission in the same way as the current system.
- the LAN transmission capacity tends to increase, and a technique for securing as much radio bandwidth as possible is indispensable.
- the adaptive modulation system when the wireless transmission quality decreases due to the influence of the weather or the like, the wireless transmission capacity is reduced because the system gain is increased by lowering the multi-value number.
- the wireless transmission capacity may be smaller than the LAN transmission capacity.
- the high priority frame occupies the band in the wireless section, and the transmission delay of the low priority frame increases, so the wireless section becomes a network bottleneck.
- the backup line is a waste of frequency and power.
- a standby system having a twin path configuration is utilized for signal transmission in the same manner as the operation system, so that a sufficient wireless band for LAN transmission is secured. For this reason, it is possible to improve that the wireless section becomes a bottleneck of the network by the adaptive modulation method, and that the frequency and power are wasted in the twin path configuration of the wireless communication apparatus.
- a program for realizing the functions of the signal processing units 305 and 409 in FIG. 1 is recorded on a computer-readable recording medium, and the program recorded on the recording medium is read into a computer system and executed to perform signal processing. May be performed.
- the “computer system” here includes an OS and hardware such as peripheral devices.
- Computer-readable recording medium refers to a portable medium such as a flexible disk, a magneto-optical disk, a ROM, and a CD-ROM, and a storage device such as a hard disk built in a computer system.
- Computer-readable recording medium refers to a volatile memory (RAM) inside a computer system that serves as a server or client when a program is transmitted via a network such as the Internet or a communication line such as a telephone line. Including those holding programs for a certain period of time.
- RAM volatile memory
- the program may be transmitted from a computer system storing the program in a storage device or the like to another computer system via a transmission medium or by a transmission wave in the transmission medium.
- a “transmission medium” for transmitting a program refers to a medium having a function of transmitting information, such as a network (communication network) such as the Internet or a communication line (communication line) such as a telephone line.
- the program may realize part of the functions described above. What can implement
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- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Power Engineering (AREA)
- Mobile Radio Communication Systems (AREA)
- Maintenance And Management Of Digital Transmission (AREA)
Abstract
Description
信号処理部305は、現用系と予備系の双方に回線障害とハードウェア障害が無い場合、現用系と予備系双方による無線伝送が可能であると判断する。この場合、信号処理部305は、レイヤ2スイッチ302は無線フレーム変換部303、304と接続している両方のポートに対してトランク設定を行う。これにより、送信側の無線通信装置301の伝送容量は予備系を使用しない場合の2倍とすることができる。
信号処理部305は、現用系か予備系の何れかに障害が発生している場合は障害が発生している方のポートを閉塞することにより障害が無い伝送路のみで運用する。
現用系と予備系の双方に回線障害が無い場合、レイヤ2スイッチ408は、無線フレーム変換部405、407と接続しているポートにトランク設定を行い、信号選択スイッチ404の後段にある無線フレーム変換部406との接続ポートは閉塞する。
現用系か予備系の何れかに回線障害が発生した場合は、レイヤ2スイッチ408は、無線フレーム変換部405、407と接続しているポートを閉塞し、無線フレーム変換部406との接続ポートを開放する。この場合、従来のツインパス同様に信号選択スイッチ404によって回線障害が発生していない伝送経路を選択する。
302、408 レイヤ2スイッチ
303、304、405、406、407 無線フレーム変換部
306、402 現用系変復調部
307、403 予備系変復調部
404 信号選択スイッチ
305、409 信号処理部
Claims (5)
- 適応変調方式を用いた無線通装置であって、
現用系伝送路と予備系伝送路の2系統の伝送路と、
前記現用系伝送路と前記予備系伝送路の回線状態を示す回線情報を取得する回線情報取得部と、
前記回線情報取得部により取得した前記回線情報に基づき、前記現用系伝送路と前記予備系伝送路に障害が発生しているか否か判断する信号処理部とを備え、
前記信号処理部は、前記現用系伝送路と前記予備系伝送路に障害が発生していないと判断した際に、前記現用系伝送路と前記予備系伝送路の2系統の伝送路を使用して無線通信を行うように設定を行い、
前記信号処理部は、前記現用系伝送路と前記予備系伝送路のいずれかに障害が発生したと判断した際に、前記現用系伝送路と前記予備系伝送路のうち障害が発生していない伝送路のみを使用して無線通信を行うように設定を行う無線通信装置。 - 前記現用系伝送路の回線状態を示す現用系回線情報を前記回線情報取得部に出力する現用系変復調部と、
前記予備系伝送路の回線状態を示す予備系回線情報を前記回線情報取得部に出力する予備系変復調部とをさらに備える請求項1に記載の無線通信装置。 - 前記回路情報取得部は、
前記現用系変復調部から前記現用系回線情報を取得し、前記現用系変復調部に現用系主信号を出力する第1の無線フレーム変換部と、
前記予備系変復調部から前記予備系回線情報を取得し、前記予備系変復調部に予備系主信号を出力する第2の無線フレーム変換部とを備える請求項2に記載の無線通信装置。 - 前記信号処理部は、前記現用系伝送路と前記予備系伝送路に障害が発生していないと判断した際に、前記第1の無線フレーム変換部を介して前記現用系変復調部に前記現用系主信号を送信するとともに、前記第2の無線フレーム変換部を介して前記予備系変復調部に前記予備系主信号を送信するように設定を行い、
前記信号処理部は、前記現用系伝送路に障害が発生したと判断した際に、前記第2の無線フレーム変換部を介して前記予備系変復調部に前記予備系主信号を送信するとともに、前記第1の無線フレーム変換部を介して前記現用系変復調部に前記現用系主信号を送信しないように設定を行い、
前記信号処理部は、前記予備系伝送路に障害が発生したと判断した際に、前記第1の無線フレーム変換部を介して前記現用系変復調部に前記現用系主信号を送信するとともに、前記第2の無線フレーム変換部を介して前記予備系変復調部に前記予備系主信号を送信しないように設定を行う請求項3に記載の無線通信装置。 - 適応変調方式を用いた無線通信装置における無線通信方法であって、
現用系伝送路と予備系伝送路の回線状態を示す回線情報を取得する回線情報取得ステップと、
前記回線情報取得ステップにより取得した前記回線情報に基づき、前記現用系伝送路と前記予備系伝送路に障害が発生しているか否か判断する信号処理ステップとを有し、
前記信号処理ステップにおいて、前記現用系伝送路と前記予備系伝送路に障害が発生していないと判断した際に、前記現用系伝送路と前記予備系伝送路の2系統の経路を使用して無線通信を行うように設定を行い、
前記信号処理ステップにおいて、前記現用系伝送路と前記予備系伝送路のいずれかに障害が発生したと判断した際に、前記現用系伝送路と前記予備系伝送路のうち障害が発生していない伝送路のみを使用して無線通信を行うように設定を行う無線通信方法。
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP11783474.7A EP2573945A4 (en) | 2010-05-20 | 2011-05-16 | WIRELESS COMMUNICATION DEVICE AND WIRELESS COMMUNICATION PROCESS |
JP2012515868A JP5482893B2 (ja) | 2010-05-20 | 2011-05-16 | 受信側無線通信装置、無線通信システム及び受信側無線通信方法 |
US13/698,528 US9246750B2 (en) | 2010-05-20 | 2011-05-16 | Wireless communication apparatus and wireless communication method |
CN201180024551.6A CN102893531B (zh) | 2010-05-20 | 2011-05-16 | 无线通信设备和无线通信方法 |
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JP2010116407 | 2010-05-20 | ||
JP2010-116407 | 2010-05-20 |
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WO2011145540A1 true WO2011145540A1 (ja) | 2011-11-24 |
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US (1) | US9246750B2 (ja) |
EP (1) | EP2573945A4 (ja) |
JP (1) | JP5482893B2 (ja) |
CN (1) | CN102893531B (ja) |
WO (1) | WO2011145540A1 (ja) |
Cited By (1)
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JP2017034373A (ja) * | 2015-07-30 | 2017-02-09 | Necエンジニアリング株式会社 | 無線通信システム、無線装置、無線通信方法および無線通信プログラム |
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JPH04275723A (ja) * | 1991-03-04 | 1992-10-01 | Fujitsu Ltd | 1:1回線切替装置 |
JP2002026909A (ja) | 2000-07-11 | 2002-01-25 | Hitachi Ltd | 回線多重化方法及び情報中継装置 |
JP2005027173A (ja) * | 2003-07-04 | 2005-01-27 | Shimada Phys & Chem Ind Co Ltd | 無線通信装置の送信部制御方法 |
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JP2009194793A (ja) * | 2008-02-18 | 2009-08-27 | Nec Corp | 無線伝送装置及び無線伝送方法 |
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WO2003015292A2 (en) * | 2001-08-10 | 2003-02-20 | Adaptive Networks, Inc. | Digital equalization process and mechanism |
JP2004032633A (ja) | 2002-06-28 | 2004-01-29 | Toshiba Corp | 伝送ネットワーク監視システムおよび伝送ネットワークの監視方法 |
JP2005244370A (ja) * | 2004-02-24 | 2005-09-08 | Nec Corp | データ転送方式 |
JP4666318B2 (ja) * | 2008-01-17 | 2011-04-06 | Necエンジニアリング株式会社 | 変調方式切替型通信装置および変調方式切替方法 |
US8102760B2 (en) * | 2009-06-30 | 2012-01-24 | Alcatel Lucent | Method for reconvergence after failure in a dual-homing network environment |
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2011
- 2011-05-16 US US13/698,528 patent/US9246750B2/en not_active Expired - Fee Related
- 2011-05-16 CN CN201180024551.6A patent/CN102893531B/zh not_active Expired - Fee Related
- 2011-05-16 EP EP11783474.7A patent/EP2573945A4/en not_active Withdrawn
- 2011-05-16 JP JP2012515868A patent/JP5482893B2/ja not_active Expired - Fee Related
- 2011-05-16 WO PCT/JP2011/061135 patent/WO2011145540A1/ja active Application Filing
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JPH04275723A (ja) * | 1991-03-04 | 1992-10-01 | Fujitsu Ltd | 1:1回線切替装置 |
JP2002026909A (ja) | 2000-07-11 | 2002-01-25 | Hitachi Ltd | 回線多重化方法及び情報中継装置 |
JP2005027173A (ja) * | 2003-07-04 | 2005-01-27 | Shimada Phys & Chem Ind Co Ltd | 無線通信装置の送信部制御方法 |
JP2005218063A (ja) | 2004-02-02 | 2005-08-11 | Nec Corp | 無線通信システムにおけるポーリング/セレクティング制御方法及びシステム |
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2017034373A (ja) * | 2015-07-30 | 2017-02-09 | Necエンジニアリング株式会社 | 無線通信システム、無線装置、無線通信方法および無線通信プログラム |
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Publication number | Publication date |
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JP5482893B2 (ja) | 2014-05-07 |
US9246750B2 (en) | 2016-01-26 |
JPWO2011145540A1 (ja) | 2013-07-22 |
CN102893531B (zh) | 2015-04-15 |
EP2573945A4 (en) | 2016-05-11 |
US20130107700A1 (en) | 2013-05-02 |
CN102893531A (zh) | 2013-01-23 |
EP2573945A1 (en) | 2013-03-27 |
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