WO2011052446A1 - 無線伝送装置及び方法、無線伝送網、及びコンピュータプログラム - Google Patents
無線伝送装置及び方法、無線伝送網、及びコンピュータプログラム Download PDFInfo
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- WO2011052446A1 WO2011052446A1 PCT/JP2010/068470 JP2010068470W WO2011052446A1 WO 2011052446 A1 WO2011052446 A1 WO 2011052446A1 JP 2010068470 W JP2010068470 W JP 2010068470W WO 2011052446 A1 WO2011052446 A1 WO 2011052446A1
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- 230000005540 biological transmission Effects 0.000 title claims abstract description 348
- 238000000034 method Methods 0.000 title claims description 26
- 238000004590 computer program Methods 0.000 title claims description 10
- 238000004364 calculation method Methods 0.000 description 12
- 238000012544 monitoring process Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 6
- 238000004891 communication Methods 0.000 description 5
- 230000003044 adaptive effect Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/54—Store-and-forward switching systems
- H04L12/56—Packet switching systems
- H04L12/5691—Access to open networks; Ingress point selection, e.g. ISP selection
- H04L12/5692—Selection among different networks
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L47/00—Traffic control in data switching networks
- H04L47/10—Flow control; Congestion control
- H04L47/25—Flow control; Congestion control with rate being modified by the source upon detecting a change of network conditions
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L47/00—Traffic control in data switching networks
- H04L47/70—Admission control; Resource allocation
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- 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
- H04L5/0058—Allocation criteria
- H04L5/0064—Rate requirement of the data, e.g. scalable bandwidth, data priority
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
- H04W28/02—Traffic management, e.g. flow control or congestion control
- H04W28/0231—Traffic management, e.g. flow control or congestion control based on communication conditions
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
- H04W28/02—Traffic management, e.g. flow control or congestion control
- H04W28/08—Load balancing or load distribution
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
- H04W28/02—Traffic management, e.g. flow control or congestion control
- H04W28/10—Flow control between communication endpoints
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/18—Information format or content conversion, e.g. adaptation by the network of the transmitted or received information for the purpose of wireless delivery to users or terminals
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W8/00—Network data management
- H04W8/02—Processing of mobility data, e.g. registration information at HLR [Home Location Register] or VLR [Visitor Location Register]; Transfer of mobility data, e.g. between HLR, VLR or external networks
- H04W8/04—Registration at HLR or HSS [Home Subscriber Server]
Definitions
- the present invention relates to a wireless transmission device, a wireless transmission method, a wireless transmission network, and a computer program, and in particular, is connected to a wired line and has an adaptive modulation function (hereinafter referred to as “AMR (Adaptive Modulation Radio) function”).
- AMR adaptive Modulation Radio
- the present invention relates to a wireless transmission device, a wireless transmission method, a wireless transmission network, and a computer program that can connect two different points with a plurality of wireless lines.
- a device having an AMR function has been developed.
- the line state of the plurality of wireless lines is monitored, and the transmission capacity of each wireless line changes.
- One problem is to realize a function (load balance function) for distributing the load of transmission data in accordance with the transmission capacity of each wireless line that has received data.
- the transmission capacity information corresponding to the modulation method of the radio channel is detected, and when the transmission data amount exceeds the total transmission capacity value of a plurality of radio channels, flow control is performed to discard the transmission data on the radio channel. It was one problem to be able to prevent this.
- Patent Document 1 discloses that the number of lines in a system, the line capacity, and the like are set by setting a threshold value for line load distribution based on each line capacity. As long as the load distribution can be handled in response to changes in the network and the amount of data transmitted is less than the total line capacity of all lines, data discard due to lack of line capacity on a specific line can be prevented. Disclosed technology. Patent Document 2 discloses a technique for obtaining an effective transmission rate when the amount of traffic of information passing through a wireless line changes dynamically, and sends out a packet according to the bandwidth of each line. A function of dividing a short packet of a certain length is disclosed.
- the load balancing of the line is performed.
- the threshold value is set based on each predetermined line capacity, and this measure is based on the premise that the line capacity does not change during the operation of the load balance control method.
- the transmission data amount below the total line capacity of all lines is processed by distributing the load of the transmission data according to changes in the number of static lines and line capacity. As far as possible, it is possible to prevent the transmission data from being discarded due to insufficient line capacity in a specific line.
- the first problem of the existing radio transmission apparatus is that it is necessary to set the number of lines to be controlled in advance by the line interface setting unit and the respective line capacities, so that it can be applied to static system changes. Even so, it is impossible to cope with a change in the transmission capacity of a dynamic radio channel due to the AMR function.
- the second problem of the existing radio transmission apparatus is that the line capacity of a specific line can be prevented even if the data transmission amount can be prevented as long as the data transmission amount equal to or less than the total line capacity of all lines is processed. If the amount of data transmission exceeds the total line capacity of the line and the data transmission amount exceeds the specific line capacity, data may be discarded in the line part. there were.
- the present invention has been made in view of the above-described conventional problems, and in a wireless transmission device having an AMR function, even when the transmission capacity of a specific wireless line changes, the wireless communication apparatus is adapted to the modulation method of the wireless line. It is possible to perform flow control based on the transmission capacity and the amount of transmission data to prevent the transmission data from being discarded in the wireless channel section and to distribute the load of transmission data according to the ratio of the transmission capacity of each wireless channel.
- An object of the present invention is to provide a wireless transmission device including a load balance control circuit that can be performed.
- the present invention comprises: a wireless transmission / reception unit that transmits / receives data via a plurality of wireless lines; and a wired transmission / reception unit that transmits / receives data via at least one wired line, A wireless transmission device that transmits data received via a wired line via the wireless line, wherein the data received via the wired line is converted into transmission data that is transmitted via the wireless line.
- Transmission data obtained by narrowing the data received via the wired line according to the bandwidth of the wireless line when the amount of data received via the wired line exceeds the total transmission capacity of the plurality of wireless lines
- Flow control means for performing flow control to convert the transmission data to the plurality of wireless circuits based on a ratio of wireless transmission capacities of the plurality of wireless lines.
- the present invention is also a wireless transmission method for transmitting data by connecting two different points with a plurality of wireless lines, monitoring each of the plurality of wireless lines, and transmitting capacity of each of the plurality of wireless lines.
- a wireless transmission method is also provided that distributes data to be transmitted to each of the plurality of wireless lines based on the ratio of the transmission capacities when the change occurs.
- a wireless transmission / reception step for transmitting / receiving data via the plurality of wireless lines
- a wired transmission / reception step for transmitting / receiving data via at least one wired line, and receiving via the wired line
- a wireless transmission network including as a component the wireless transmission device that connects two different points with a plurality of wireless lines.
- the present invention also includes a wireless transmission / reception step for transmitting / receiving data via a plurality of wireless lines, and a wired transmission / reception step for transmitting / receiving data via at least one wired line, and receiving via the wired line.
- a computer program that causes a computer to execute control of a wireless transmission device that transmits the received data via the wireless line, and converts the data received via the wired line to transmission data that is transmitted via the wireless line At this time, if the amount of data received via the wired line exceeds the total transmission capacity of the plurality of wireless lines, the data received via the wired line is narrowed down to the band of the wireless line.
- a flow control step for performing flow control to convert the transmission data into the transmission data; and Also provides a computer program based in the ratio of the wireless transmission capacity and a transmission data distribution step of distributing to each of the plurality of radio channel.
- the technique described in Patent Document 2 is a technique in which the traffic amount of information passing through a wireless line dynamically changes.
- the wireless transmission device of the present invention It deals with the case where the bandwidth changes dynamically, that is, not the effective transmission speed, but also enables the distribution of data to each wireless line even when the bandwidth of the wireless line changes dynamically. Function and configuration are different.
- the transmission packet is not prevented from being discarded by the function of dividing the transmission packet into short packets having a length corresponding to the bandwidth of each line.
- control ie, narrowing down transmission data in accordance with the band of the radio channel band
- the transmission data amount of transmission data is monitored, the flow control of transmission data is performed so as not to exceed the total transmission capacity of a plurality of wireless lines, and
- the transmission data is converted to transmission data with a reduced amount of transmission data according to the bandwidth, and the transmission data is distributed based on the ratio of the wireless transmission capacity of each wireless line, so it is appropriate without causing the transmission data to be discarded in the wireless line system.
- the wireless transmission device, the wireless transmission method, and the wireless transmission network of the present invention are a wireless transmission device, a wireless transmission method, and a wireless transmission network that can connect two different points with a plurality of wireless lines.
- the wireless transmission apparatus has an AMR function, monitors the line states of a plurality of wireless lines, and transmits transmission data corresponding to the received transmission capacity of each wireless line even when the transmission capacity of each wireless line changes.
- a load balance function characterized by performing load balancing is realized.
- the wireless transmission device of the present invention detects transmission capacity information according to the modulation method of the wireless line, and performs flow control (data amount to be transmitted at a time) when the transmission data amount exceeds the total transmission capacity value of the wireless line. The transmission data on the wireless line can be prevented from being discarded.
- FIG. 1 is a configuration diagram illustrating an overall configuration of a wireless transmission device according to an embodiment of the present invention.
- a wireless transmission device 1 includes a load balance control unit 11 that receives transmission data D10 via a LAN (Local Area Network) line E1, and a modulation / demodulation function unit that performs modulation / demodulation of the wireless line transmission data D1.
- LAN Local Area Network
- a modulation / demodulation function unit 13 that performs modulation / demodulation of the wireless line transmission data D5
- a wireless transmission / reception circuit 14 that performs transmission / reception of signals via the wireless lines R1 and R2, and reception that transmits the reception data D11 via the LAN line E1.
- a data control unit 15. For example, it is assumed that the LAN line E1 conforms to a standard standardized by the IEEE 802.3 committee.
- a load balance control unit 11 performs control for distributing transmission data D10 received from the LAN line E1 to the wireless transmission device 1 to the wireless line R1 and the wireless line R2. This distribution is performed based on the transmission capacity information D4 received from the modulation / demodulation function unit 12 and the transmission capacity information D6 received from the modulation / demodulation function unit 13, and the load balance control unit 11 transmits the radio line transmission reflecting this distribution.
- Data D1 and wireless line transmission data D5 are sent to modulation / demodulation function unit 12 and modulation / demodulation function unit 13, respectively.
- the load balance control unit 11 uses the transmission capacity information D4 of the wireless line R1 received from the modulation / demodulation function part 12 and the transmission capacity information D6 of the wireless line R2 received from the modulation / demodulation function part 13 to The transmission capacity with the line R2 is monitored.
- the load balance control unit 11 monitors the transmission data D10 in its own traffic monitoring unit 111 (FIG. 2), and calculates the transmission capacity difference calculation unit 112 (the remaining amount of transmission capacity as the transmission data amount D21). ).
- the transmission capacity difference calculation unit 112 receives the transmission capacity information D4, the transmission capacity information D6, and the transmission data amount D21.
- the total transmission data amount exceeds the total transmission capacity of the radio lines R1 and R2. If so, the transmission data control unit 113 performs flow control to reduce the amount of data output to the radio lines R1 and R2.
- the load balance control unit 11 distributes transmission data to be transmitted via the radio lines R1 and R2 based on a transmission capacity value ratio D24 indicating a ratio of transmission capacities of the radio lines R1 and R2.
- the modulation / demodulation function unit 12 and the modulation / demodulation function unit 13 output the wireless line transmission data D 1 and D 5 received from the load balance control unit 11 to the wireless transmission / reception circuit 14. Further, the modulation / demodulation function unit 12 and the modulation / demodulation function unit 13 have a function of controlling the modulation schemes of the radio channels R1 and R2, and transfer capacity information D4 and D6 corresponding to the modulation schemes of the radio channels R1 and R2 to the load balance control unit. 11 to output. Further, the modulation / demodulation function unit 12 sends the wireless line reception data D3 received from the wireless transmission / reception circuit 14 to the reception data control unit 15 as the wireless line reception data D9. The wireless line reception data D8 is sent to the reception data control unit 15 as wireless line reception data D12.
- the wireless transmission / reception circuit 14 transmits the wireless line transmission data D2 received from the modulation / demodulation function unit 12 via the wireless line R1, and transmits the wireless line transmission data D7 received from the modulation / demodulation function unit 13 via the wireless line R2. Further, the radio transmission / reception circuit 14 sends the radio channel reception data D3 received from the radio channel R1 to the modulation / demodulation function unit 12, and sends the radio channel reception data D8 received from the radio channel R2 to the modulation / demodulation function unit 13.
- the reception data control unit 15 transmits the wireless line reception data D9 received from the modulation / demodulation function unit 12 and the wireless line reception data D12 received from the modulation / demodulation function unit 13 as reception data D11 via the LAN line E1.
- FIG. 2 also referred to above is a configuration diagram showing a configuration of the load balance control unit 11 of the wireless transmission device according to the embodiment of the present invention.
- the load balance control unit 11 monitors the communication amount of the transmission data D10 and calculates the difference between the communication amount monitoring unit 111 that outputs the transmission data amount D21 and the total transmission capacity of the wireless line and the transmission data amount.
- the transmission capacity difference calculation unit 112 that controls the transmission data D10 based on the transmission capacity difference D23, and the transmission data control unit 113 that outputs the transmission data D22 and the ratio of the transmission capacity between the radio line R1 and the radio line R2
- the communication amount monitoring unit 111 monitors the data amount of the received transmission data D10 and sends it to the transmission capacity difference calculating unit 112 as the transmission data amount D21. Based on the transmission data amount D21 received from the traffic monitoring unit 111, the transmission capacity information D4, and the transmission capacity information D6, the transmission capacity difference calculation unit 112 calculates the total radio of the radio line R1 and the radio line R2 (FIG. 1). The difference between the line transmission capacity and the transmission data amount D21 is calculated and sent to the transmission data control unit 113 as the transmission capacity difference D23.
- the transmission capacity value ratio calculation unit 114 calculates the ratio of the transmission capacity between the radio line R1 and the radio line R2 based on the received transmission capacity information D4 and the transmission capacity information D6, and sets it as the transmission capacity value ratio D24.
- the data is sent to the transmission data sorting unit 115.
- the transmission data control unit 113 verifies the received transmission data D10 based on the transmission capacity difference D23 received from the transmission capacity difference calculation unit 112, and the transmission data amount D10 exceeds the above-described total radio channel transmission capacity ( When it is determined that the transmission capacity difference D23 is given as negative), flow control is performed (flow control means), and the transmission data D22 is sent to the transmission data distribution unit 115.
- the transmission data distribution unit 115 distributes the transmission data D22 received from the transmission data control unit 113 based on the transmission capacity value ratio D24 received from the transmission capacity value ratio calculation unit 114, and transmits the wireless line transmission data D1 and the wireless line Output as transmission data D5. It is well known among those skilled in the art that the transmission capacity of a wireless line changes by changing the modulation method, and since it is not directly related to the present invention, the description thereof is omitted here. With the above configuration, the load balance control unit 11 can realize a load balance control function applicable to the wireless transmission device 1 having the AMR function.
- FIG. 3 is an explanatory diagram showing the relationship between the transmission capacity information of the wireless line and the amount of transmission data as one embodiment data.
- an example of the transmission capacity information D4 (FIG. 1) input to the load balance control unit 11 is referred to as transmission capacity information 301.
- the transmission capacity information D6 (FIG. 1) input to the load balance control unit 11 One example is the transmission capacity information 302, the total transmission capacity value is the total transmission capacity value 303, and one example of the transmission data amount D21 (FIG. 2) is the transmission data amount 304.
- An example of the transmission capacity difference D23 (FIG. 2) is assumed to be a transmission capacity difference 305.
- an embodiment in which the total transmission capacity 303 of the wireless line exceeds the transmission data amount 304 will be described with reference to the embodiment data in FIG.
- the transmission capacity difference calculation unit 112 calculates the transmission capacity difference 305 as A + B ⁇ T.
- the transmission capacity difference 305 is a positive value. Therefore, in this example, since the total transmission capacity 303 of the wireless line exceeds the transmission data amount 304, the transmission data control unit 113 does not perform flow control of transmission data.
- the transmission capacity value ratio calculation unit 114 calculates the transmission capacity ratio as A: B and sends it to the transmission data distribution unit 115.
- the transmission data distribution unit 115 sets the wireless line transmission data D1 to T ⁇ A / (A + B) and the wireless line transmission data D5 to T ⁇ B / (A + B) based on the transmission capacity ratio (A: B) described above.
- FIG. 4 is an explanatory diagram illustrating another relationship between the transmission capacity information of the wireless line and the transmission data amount as one embodiment data.
- the transmission capacity information D4 (FIG. 1) input to the load balance control unit 11 is referred to as transmission capacity information 401.
- the transmission capacity information D6 (FIG.
- the transmission capacity information 402 is the total transmission capacity value 403, and one example of the transmission data amount D21 (FIG. 2) is the transmission data amount 404.
- An example of the transmission capacity difference D23 (FIG. 2) is referred to as a transmission capacity difference 405.
- the transmission data control unit 113 controls the flow of the transmission data D10.
- the transmission capacity ratio is calculated as A: (BX), and is sent to the transmission data distribution unit 115.
- the transmission data distribution unit 115 sets the wireless line transmission data D1 to T ⁇ A / (A + BX) and the wireless line transmission data D5 to T ⁇ (B ⁇ X) / (A + B ⁇ X)
- the transmission data control unit 113 controls the flow of the transmission data D10 (adjustment of the amount of data transmitted at a time) as described above. Accurate load balance control can be performed without causing partial destruction.
- the traffic monitoring unit 111 monitors the transmission data amount of the transmission data D10 in the load balance control unit 11, and the transmission data control unit 113 uses the wireless line R1. , R2 to control the flow of the transmission data D10 so as not to exceed the total transmission capacity, and send the transmission data D22 whose data amount is narrowed down according to the bandwidth of the line to the transmission data distribution unit 115. Since the transmission data D22 is distributed based on the ratio of the wireless transmission capacities of the wireless lines R1 and R2 at 115, appropriate load balance control can be performed without causing the transmission data to be discarded in the wireless line system. There is an effect to become.
- the present invention can be applied to the construction of a wireless transmission device, and is particularly suitable for construction of a wireless transmission device having an AMR function and capable of connecting two different points with a plurality of wireless lines.
- Wireless transmission device (device according to the present invention) 11 Load balance control unit 12, 13 Modulation / demodulation function unit 14 Wireless transmission / reception circuit 15 Reception data control unit 111 Communication volume monitoring unit 112 Transmission capacity difference calculation unit 113 Transmission data control unit 114 Transmission capacity value ratio calculation unit 115 Transmission data distribution unit E1 LAN Line R1, R2 Wireless line
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Abstract
Description
本願は、2009年10月29日に出願された特願2009-248735号に基づき優先権を主張し、その内容をここに援用する。
このような無線伝送装置の場合、有線回線のデータを該複数の無線回線で送信するには、該複数の無線回線の回線状態を監視し、それぞれの無線回線の伝送容量が変化した場合には、データ受信したそれぞれの無線回線の伝送容量に応じた送信データの負荷分散を行う機能(ロードバランス機能)を実現することが1つの課題であった。
また、無線回線の変調方式に応じた伝送容量情報を検出し、送信データ量が複数の無線回線のトータル伝送容量値を上回る場合にはフロー制御を行うことによって、無線回線での送信データの破棄を防止できるようにすることが1つの課題であった。
また、特許文献2には、無線回線を通過する情報のトラフィック量が動的に変化する場合に、実行伝送速度を取得する技術を開示しており、また、送出パケットを各回線の帯域に応じた長さの短パケットに分割する機能を開示している。
ロードバランス制御方式の運用中以外の場合は、静的な回線数や回線容量の変化に応じて、送信データの負荷分散を行うことにより、全回線のトータル回線容量以下の送信データ量を処理する限りは、たしかに、特定の回線における回線容量不足による送信データの破棄を防げるものとしてよい。
また、既成の無線伝送装置の第2の問題点は、全回線のトータル回線容量以下のデータ送信量を処理する限りはデータの破棄を防ぐことが可能であっても、特定の回線の回線容量が動的に変化したり、特定の回線容量が少なくなって、回線のトータル回線容量をデータ送信量が越えてしまう場合には、回線部分においてデータの破棄が生じてしまうことがあるということにあった。
典型的には、前記複数の無線回線を介してデータを送受信する無線送受信ステップと、少なくとも1回線の有線回線を介してデータを送受信する有線送受信ステップと、を備え、前記有線回線を介して受信したデータを前記無線回線を介して送信する無線伝送方法であって、前記有線回線を介して受信したデータを前記無線回線を介して送信する送信データに変換するに際して、前記有線回線を介して受信したデータのデータ量が前記複数の無線回線のトータル伝送容量を超えている場合に、前記有線回線を介して受信したデータを前記無線回線の帯域に合わせて絞った送信データに変換するフロー制御を行うフロー制御ステップと、前記送信データを、前記複数の無線回線の各々の無線伝送容量の比に基づいて前記複数の無線回線の各々に分配する送信データ分配ステップと、を有する。
また、本発明では、前述の特許文献2に記載のように、送出パケットを各回線の帯域に応じた長さの短パケットに分割する機能により、送信データの破棄を防止するものではなく、フロー制御を行うこと(即ち、送信データについて、無線回線帯域の帯域に合わせた絞り込みを実施すること)により、送信データの破棄を防止している。
また、本発明の無線伝送装置は、無線回線の変調方式に応じた伝送容量情報を検出し、送信データ量が無線回線のトータル伝送容量値を上回る場合にはフロー制御(一度に送出するデータ量の調整)を行うことによって無線回線での送信データの破棄を防止することができるように構成している。
図1は、本発明の実施形態に係る無線伝送装置の全体構成を示す構成図である。
同図において、本実施形態の無線伝送装置1は、LAN(Local Area Network)回線E1を介して送信データD10を受信するロードバランス制御部11と、無線回線送信データD1の変復調を行う変復調機能部12と、無線回線送信データD5の変復調を行う変復調機能部13と、無線回線R1,R2を介した信号の送受信を行う無線送受信回路14と、LAN回線E1を介して受信データD11を送信する受信データ制御部15と、を備える。
例えば、LAN回線E1は、IEEE802.3委員会によって標準化された規格によるものとする。
図1において、ロードバランス制御部11は、無線伝送装置1にLAN回線E1から受信した送信データD10を無線回線R1及び無線回線R2へ振り分けるための制御を行なう。
この振り分けは、変復調機能部12から受信した伝送容量情報D4と、変復調機能部13から受信した伝送容量情報D6とに基づいて行い、ロードバランス制御部11は、この振り分けを反映させた無線回線送信データD1および無線回線送信データD5を、それぞれ変復調機能部12および変復調機能部13に送出する。
これにより、ロードバランス制御部11は、変復調機能部12から受信した無線回線R1の伝送容量情報D4と、変復調機能部13から受信した無線回線R2の伝送容量情報D6とにより、無線回線R1と無線回線R2との伝送容量を監視する。
この伝送容量差分計算部112には、前述の伝送容量情報D4及び伝送容量情報D6と、送信データ量D21とが入力され、送信データ量のトータルが無線回線R1,R2のトータル伝送容量を越えている場合に送信データ制御部113においてフロー制御を行い、無線回線R1,R2に出力するデータ量を絞る。
さらに、ロードバランス制御部11は、無線回線R1と無線回線R2との伝送容量の比を示す伝送容量値比率D24に基づいて、無線回線R1,R2を介して送信する送信データを振り分ける。
また、変復調機能部12及び変復調機能部13は、無線回線R1,R2の変調方式を制御する機能を備え、無線回線R1,R2の変調方式に応じた伝送容量情報D4,D6をロードバランス制御部11へ出力する。
また、変復調機能部12は、無線送受信回路14から受信した無線回線受信データD3を、無線回線受信データD9として受信データ制御部15に送出し、変復調機能部13は、無線送受信回路14から受信した無線回線受信データD8を、無線回線受信データD12として受信データ制御部15に送出する。
また、無線送受信回路14は、無線回線R1から受信した無線回線受信データD3を変復調機能部12に送出し、無線回線R2から受信した無線回線受信データD8を変復調機能部13に送出する。
受信データ制御部15は、変復調機能部12から受信した無線回線受信データD9、及び変復調機能部13から受信した無線回線受信データD12を、受信データD11としてLAN回線E1を介して送信する。
同図において、ロードバランス制御部11は、送信データD10の通信量を監視し、送信データ量D21として出力する通信量監視部111と、無線回線のトータル伝送容量と送信データ量との差分を計算する伝送容量差分計算部112と、伝送容量差分D23に基づいて送信データD10を制御し、送信データD22として出力する送信データ制御部113と、無線回線R1と無線回線R2との伝送容量の比率を計算する伝送容量値差比率計算部114と、送信データD22を伝送容量値比率D24に基づいて無線回線R1と無線回線R2にそれぞれ対する無線回線送信データD1とD5とに振り分ける送信データ振り分け部115(送信データ分配手段)と、を備えて構成される。
通信量監視部111は、受信した送信データD10のデータ量を監視し、送信データ量D21として、伝送容量差分計算部112へ送出する。
伝送容量差分計算部112は、通信量監視部111から受信した送信データ量D21と、伝送容量情報D4及び伝送容量情報D6とに基づいて、無線回線R1及び無線回線R2(図1)のトータル無線回線伝送容量と送信データ量D21との差分を計算し、伝送容量差分D23として、送信データ制御部113へ送出する。
送信データ制御部113は、受信した送信データD10を、伝送容量差分計算部112から受信した伝送容量差分D23に基づいて検証し、送信データ量D10が前述のトータル無線回線伝送容量を上回っている(伝送容量差分D23が負として与えられている)と判断される場合にはフロー制御を行い(フロー制御手段)、送信データD22として送信データ振り分け部115へ送出する。
なお、変調方式を変化させることによって無線回線の伝送容量が変化することについては当業者間では良く知られていることであり、本発明とは直接関係しないため、ここでの説明は省略する。
以上の構成により、ロードバランス制御部11は、AMR機能を備えた無線伝送装置1に適用可能なロードバランス制御機能を実現することができる。
以下、本実施形態の無線伝送装置の動作を実施例に基づいて説明する。
図3は、無線回線の伝送容量情報と送信データ量との関係を1実施例データとして示す説明図である。
ここでは、ロードバランス制御部11に入力される伝送容量情報D4(図1)の1例を伝送容量情報301とし、同じく、ロードバランス制御部11に入力される伝送容量情報D6(図1)の1例を伝送容量情報302とし、トータル伝送容量値をトータル伝送容量値303とし、送信データ量D21(図2)の1例を送信データ量304とする。また、伝送容量差分D23(図2)の1例を伝送容量差分305とする。
以下、無線回線のトータル伝送容量303が送信データ量304を上回っている場合についての実施例を図3の実施例データを参照して説明する。
図3に示す実施例データにおいては、伝送容量差分305がA+B-T>0であるので、伝送容量差分305は正の値となる。よって、この例では無線回線のトータル伝送容量303が送信データ量304を上回っている場合であるので、送信データ制御部113では送信データのフロー制御を行わない。
図4は、無線回線の伝送容量情報と送信データ量との他の関係を1実施例データとして示す説明図である。
ここでは、ロードバランス制御部11に入力される伝送容量情報D4(図1)の1例を伝送容量情報401とし、同じく、ロードバランス制御部11に入力される伝送容量情報D6(図1)の1例を伝送容量情報402とし、トータル伝送容量値をトータル伝送容量値403とし、送信データ量D21(図2)の1例を送信データ量404とする。また、伝送容量差分D23(図2)の1例を伝送容量差分405とする。
図4において、無線回線R1の伝送容量情報401をA、無線回線R2の伝送容量情報をB-Xと動的に変化させた場合、図3の実施例と同様に、無線回線のトータル伝送容量値403はA+B-Xとなる。同様に、送信データ量404をTとすると、伝送容量差分405はA+B-X-Tとなる。
この実施例の場合は、伝送容量差分405がA+B-X-T<0であるので、伝送容量差分405は負の値となる。即ち、送信データ量404が、無線回線のトータル伝送容量403を上回っている場合場合であるので、送信データ制御部113において送信データD10のフロー制御を行う。
また、図4の実施例データの場合は、前述のように送信データ制御部113において送信データD10のフロー制御(一度に送出するデータ量の調整)を行うため、無線回線系統における送信データD10の一部破棄は生じさせることなく、的確なロードバランス制御を行うことができる。
11 ロードバランス制御部
12,13 変復調機能部
14 無線送受信回路
15 受信データ制御部
111 通信量監視部
112 伝送容量差分計算部
113 送信データ制御部
114 伝送容量値比率計算部
115 送信データ振り分け部
E1 LAN回線
R1,R2 無線回線
Claims (10)
- 複数の無線回線を介してデータを送受信する無線送受信手段と、少なくとも1回線の有線回線を介してデータを送受信する有線送受信手段と、を備え、前記有線回線を介して受信したデータを前記無線回線を介して送信する無線伝送装置であって、
前記有線回線を介して受信したデータを前記無線回線を介して送信する送信データに変換するに際して、前記有線回線を介して受信したデータのデータ量が前記複数の無線回線のトータル伝送容量を超えている場合に、前記有線回線を介して受信したデータを前記無線回線の帯域に合わせて絞った送信データに変換するフロー制御を行うフロー制御手段と、
前記送信データを、前記複数の無線回線の各々の無線伝送容量の比に基づいて前記複数の無線回線の各々に分配する送信データ分配手段と、を備えたことを特徴とする無線伝送装置。 - 前記複数の無線回線の各々の無線伝送容量及びトータル伝送容量は、動的に変化するものであることを特徴とする請求項1記載の無線伝送装置。
- 前記有線回線は、LAN回線であることを特徴とする請求項1記載の無線伝送装置。
- 前記複数の無線回線の各々の変調方式を制御し、該変調方式に応じた各無線回線の無線伝送容量を出力する変調方式制御手段を更に備えたことを特徴とする請求項1記載の無線伝送装置。
- 異なる2地点間を複数の無線回線で結び、データを送信する無線伝送方法であって、前記複数の無線回線の各々を監視し、前記複数の無線回線の各々の伝送容量が変化した場合に、それら伝送容量の比に基づいて、送信するデータを前記複数の無線回線の各々に分配することを特徴とする無線伝送方法。
- 前記複数の無線回線を介してデータを送受信する無線送受信ステップと、少なくとも1回線の有線回線を介してデータを送受信する有線送受信ステップと、を備え、前記有線回線を介して受信したデータを前記無線回線を介して送信する無線伝送方法であって、
前記有線回線を介して受信したデータを前記無線回線を介して送信する送信データに変換するに際して、前記有線回線を介して受信したデータのデータ量が前記複数の無線回線のトータル伝送容量を超えている場合に、前記有線回線を介して受信したデータを前記無線回線の帯域に合わせて絞った送信データに変換するフロー制御を行うフロー制御ステップと、
前記送信データを、前記複数の無線回線の各々の無線伝送容量の比に基づいて前記複数の無線回線の各々に分配する送信データ分配ステップと、を有することを特徴とする請求項5記載の無線伝送方法。 - 前記複数の無線回線の各々の無線伝送容量及びトータル伝送容量は、動的に変化するものであることを特徴とする請求項6記載の無線伝送方法。
- 前記複数の無線回線の各々の変調方式を制御し、該変調方式に応じた各無線回線の無線伝送容量を出力する変調方式制御ステップを更に有することを特徴とする請求項6記載の無線伝送方法。
- 異なる2地点間を前記複数の無線回線で結ぶ請求項1から4のいずれか1項に記載の無線伝送装置を構成要素に含む無線伝送網。
- 複数の無線回線を介してデータを送受信する無線送受信ステップと、少なくとも1回線の有線回線を介してデータを送受信する有線送受信ステップと、を備え、前記有線回線を介して受信したデータを前記無線回線を介して送信する無線伝送装置の制御をコンピュータに実行させるコンピュータプログラムであって、
前記有線回線を介して受信したデータを前記無線回線を介して送信する送信データに変換するに際して、前記有線回線を介して受信したデータのデータ量が前記複数の無線回線のトータル伝送容量を超えている場合に、前記有線回線を介して受信したデータを前記無線回線の帯域に合わせて絞った送信データに変換するフロー制御を行うフロー制御ステップと、
前記送信データを、前記複数の無線回線の各々の無線伝送容量の比に基づいて前記複数の無線回線の各々に分配する送信データ分配ステップと、を有することを特徴とするコンピュータプログラム。
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CN2010800485093A CN102598763A (zh) | 2009-10-29 | 2010-10-20 | 无线传送装置和方法、无线传送网络及计算机程序 |
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