WO2014157241A1 - 制御装置、通信システム、制御情報の送信方法及びプログラム - Google Patents
制御装置、通信システム、制御情報の送信方法及びプログラム Download PDFInfo
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- WO2014157241A1 WO2014157241A1 PCT/JP2014/058349 JP2014058349W WO2014157241A1 WO 2014157241 A1 WO2014157241 A1 WO 2014157241A1 JP 2014058349 W JP2014058349 W JP 2014058349W WO 2014157241 A1 WO2014157241 A1 WO 2014157241A1
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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
- H04L47/20—Traffic policing
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/20—Control channels or signalling for resource management
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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
- H04W28/06—Optimizing the usage of the radio link, e.g. header compression, information sizing, discarding information
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
- H04W72/044—Wireless resource allocation based on the type of the allocated resource
- H04W72/0446—Resources in time domain, e.g. slots or frames
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/50—Allocation or scheduling criteria for wireless resources
- H04W72/53—Allocation or scheduling criteria for wireless resources based on regulatory allocation policies
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
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- the present invention is based on a Japanese patent application: Japanese Patent Application No. 2013-063578 (filed on March 26, 2013), and the entire description of the application is incorporated herein by reference.
- the present invention relates to a control device, a communication system, a control information transmission method, and a program, and more particularly, to a control device, a communication system, a control information transmission method, and a program for centralized control of communication nodes to be controlled.
- Non-Patent Documents 1 and 2 OpenFlow captures communication as an end-to-end flow and performs path control, failure recovery, load balancing, and optimization on a per-flow basis.
- the OpenFlow switch specified in Non-Patent Document 2 includes a secure channel for communication with the OpenFlow controller, and operates according to a flow table that is appropriately added or rewritten from the OpenFlow controller. For each flow, a set of match conditions (Match Fields), flow statistical information (Counters), and instructions (Instructions) that define processing contents are defined for each flow (non-patented). (Refer to “5.2 Flow Table” in Document 2).
- the OpenFlow switch searches the flow table for an entry having a matching condition (see “5.3 Matching” in Non-Patent Document 2) that matches the header information of the received packet. If an entry that matches the received packet is found as a result of the search, the OpenFlow switch updates the flow statistical information (counter) and processes the processing (designated) in the instruction field of the entry for the received packet. Perform packet transmission, flooding, discard, etc. from the port. On the other hand, if no entry matching the received packet is found as a result of the search, the OpenFlow switch sends an entry setting request to the OpenFlow controller via the secure channel, that is, a control for processing the received packet. An information transmission request (Packet-In message) is transmitted. The OpenFlow switch receives a flow entry whose processing content is defined and updates the flow table. As described above, the OpenFlow switch performs packet transfer using the entry stored in the flow table as control information.
- a matching condition see “5.3 Matching” in Non-Patent Document 2
- the OpenFlow switch updates the flow statistical information (counter
- Patent Document 1 discloses a configuration in which a plurality of controllers are arranged to improve fault tolerance in a communication system using the above OpenFlow.
- Patent Document 2 discloses a configuration in which a plurality of controllers exchange route information in a communication system using the OpenFlow.
- Patent Document 3 discloses a configuration in which the active controller and the standby controller among a plurality of controllers synchronize the setting state of the flow entry to the node in the communication system using the open flow. Is disclosed (see, for example, FIG. 18, 19).
- JP 2011-160363 A International Publication No. 2011/083780 International Publication No. 2012/048807
- Patent Documents 1 to 3 disclose a configuration in which a plurality of controllers are arranged. However, the configuration of Patent Document 1 corresponds to “6.3.4 Multiple Controllers” of Non-Patent Document 2, and information exchange between controllers is not performed.
- the controller of Patent Document 2 is limited to distributing the calculated route information to other controllers. For example, the controller of Patent Document 2 does not exchange information such as what flow entries are created according to the route.
- the controller of Patent Document 3 synchronizes the setting state of the flow entry with that of the standby controller, and its contents are also required to be completely synchronized.
- An object of the present invention is to provide a control device, a communication system, a control information transmission method, and a program that can contribute to improvement of user convenience by sharing information among a plurality of control devices arranged in a centralized control network. To do.
- a control unit that controls a network under control by setting control information in a communication node to be controlled, and control information to be transmitted to another control device among the control information
- a control device includes a policy storage unit that holds a policy, and a control information exchange unit that transmits control information selected by referring to the policy to the other control device.
- a first control device comprising: a policy storage unit that holds a policy of: a control information exchange unit that transmits control information selected with reference to the policy to the second control device; and
- a communication system including a second control device that creates control information to be set in a communication node to be controlled using control information received from the control device.
- a control unit that controls a network to be controlled by setting control information in a communication node to be controlled, and control information to be transmitted to another control device among the control information
- a control device including a policy storage unit that holds a policy, with reference to the policy, selecting a control information to be transmitted to the other control device; and selecting the control information for the other control device.
- a method for transmitting control information is provided. This method is associated with a specific machine called a control device that controls a communication node.
- a control unit that controls a network under control by setting control information in a communication node to be controlled, and control information to be transmitted to another control device among the control information
- a program for executing information transmission processing is provided. This program can be recorded on a computer-readable (non-transient) storage medium. That is, the present invention can be embodied as a computer program product.
- a control unit 101 that controls a network under control by setting control information in a communication node to be controlled, and another control device of the control information
- a policy storage unit 102 that holds a policy for selecting control information to be transmitted to the control unit, and a control information exchanging unit 103 that transmits the control information selected with reference to the policy to the other control device. It can be realized by a control device.
- the control device 100A sets the control information “transfer the packet addressed to the server B from the terminal A to the server B connection switch” for the subordinate communication node 200.
- the policy storage unit 102 stores a policy for transmitting control information generated by communication between the terminal and the server to the second control device 100B
- the control information exchanging unit 103 stores the control information in the control device 100B. In contrast, the control information described above is transmitted.
- the second control device 100B is connected or reachable to the network managed by the control device 100A from the control information that “the packet addressed to the server B from the terminal A is transferred to the server B connection switch”. It is possible to obtain information such as being in a proper position and that communication between the terminal A and the server B is permitted.
- the second control device 100B is sent from the control device 100A. Control information for processing a packet from terminal A can be created using the control information.
- the policy set in the policy storage unit 102 is not limited to the above example.
- the filtering may be performed according to the transmission source (terminal), the destination, or the like, or the filtering may be performed according to the communication type.
- FIG. 2 is a diagram illustrating the configuration of the communication system according to the first embodiment of this invention. Referring to FIG. 2, there is shown a configuration in which a first control device 10A that controls a switch 20 to be controlled and a second control device 10B that controls the switch 20 to be controlled are connected.
- the first control device 10A and the second control device 10B control the switch by setting control information in the switch 20 via the control channel.
- Examples of such a control device and switch include the OpenFlow controller and OpenFlow switch (including terminals having an OpenFlow switch function) disclosed in Non-Patent Documents 1 and 2. Of course, other central control type network control devices and switches may be used.
- the switch 20 to be controlled by the first control device 10 ⁇ / b> A and the switch 20 to be controlled by the second control device 10 ⁇ / b> B are separately described. It may be duplicated. In this case, a switch that receives control information settings and the like from the two control devices accepts the control information received first, as in “6.3.4 Multiple Controllers” of Non-Patent Document 2 and Patent Document 1. It is sufficient to perform an operation such as
- control devices In the example of FIG. 2, two control devices are shown, but the number of control devices may be three or more. In this case, it is possible to set a policy as appropriate so that the control information sent to each control device has a difference.
- FIG. 3 is a block diagram showing a configuration of the first control apparatus 10A according to the first embodiment of the present invention.
- the structure provided with the information selection part 17 is shown.
- the switch control unit 11 controls the switch by setting control information as shown in FIG. Match conditions 1 and 2 in FIG. 4 are fields indicating the contents of collating the header and the like of the received packet.
- the action field is a field for setting processing contents (transfer from a specific port, header rewriting, packet discard, etc.) to be applied to a packet that matches the matching condition. For example, when the switch 20 in which the control information of FIG. 4 is set receives a packet having a source IP address of 192.168.10.2 and a destination IP address of 192.168.100.1, The content of “action 1” indicated in the action field is applied to the packet.
- the timing at which the control information is set in the switch 20 is when a request from the switch 20 (for example, a Packet-In message in Non-Patent Document 2) is received, or the control device 10A detects a change in the network topology. For example, the existing packet transfer path is changed.
- the control information storage unit 12 is configured by a database or the like that stores the control information set in the switch 20 in association with the ID or the like of the setting destination switch.
- the policy setting reception unit 13 receives a policy for selecting control information to be transmitted to another control device from the network administrator via the external management device 30, and transmits the policy to the transmission control information selection unit 14. Further, the policy setting reception unit 13 of the present embodiment receives a policy for selecting control information stored in the control information storage unit 12 among the control information received from other control devices, and transmits it to the reception control information selection unit 17. To do.
- the transmission control information selection unit 14 refers to the policy sent from the policy setting reception unit 13 and selects control information to be transmitted to another control device from the control information stored in the control information storage unit 12 To do.
- FIG. 5 is a diagram illustrating an example of a transmission policy for selecting control information to be transmitted to another control device.
- the transmission control information selection unit 14 has a destination IP address of 192.168.100.1 from the control information stored in the control information storage unit 12. A certain entry is found and transmitted to the second control apparatus 10B.
- the search range of control information stored in the control information storage unit 12 (sends that have been added or changed within the past predetermined time), transmission timing (every predetermined time, there is a change) Or the like when the number of control information reaches a predetermined number).
- a policy that adds topology information, failure history information, and the like between switches known by the control device to a transmission target may be generated.
- the control information transmission unit 15 transmits the control information selected by the transmission control information selection unit 14 to the designated control device.
- control information receiving unit 16 When receiving the control information from another control device, the control information receiving unit 16 transfers the control information to the reception control information selecting unit 17.
- the reception control information selection unit 17 refers to the policy sent from the policy setting reception unit 13 and stores the control information sent from the control information reception unit 16 in the control information storage unit 12 or discards it without storing it. Decide what to do.
- FIG. 6 is a diagram illustrating an example of a reception policy for determining whether or not to register control information received from another control device in the control information storage unit 12.
- the reception control information selection unit 14 performs an operation of storing the control information whose destination IP address is 192.168.100.1 in the control information storage unit 12.
- a transmission source (control device) of control information to be accepted, a control information type, and the like may be defined. By doing in this way, the quality of the control information transmitted / received can be improved.
- a policy may be generated that adds not only the control information but also topology information between the switches and fault history information, which are grasped by other control devices, to the object to be accepted. By doing in this way, it becomes possible to inform the other control apparatus of the state of the network on the transmission side, which is difficult to discriminate only by the control information.
- Border Gateway Protocol Version 4 As a protocol for the control information transmitting unit 15 and the control information receiving unit 16 to exchange control information with other control devices, the Border Gateway Protocol Version 4 (hereinafter, “BGP4”) can be used.
- message types such as addition, update (UPDATE), and keepalive of control information can be used in the Type field of the BGP4 header.
- the transmission of control information is performed by exchanging route information in BGP4 by storing control information to be transmitted in variable length fields of these messages (optional parameter field of OPEN message and variable length fields of UPDATE message). It becomes possible to exchange control information in the same procedure.
- other protocols such as HTTP (Hypertext Transfer Protocol) and HTTPS (Hypertext Transfer Protocol over Secure Socket Layer) can be extended and used.
- the configuration of the first control device 10A has been described above, but the second control device 10B can also have the same configuration. Also, depending on the operation policy, a control device that does not transmit control information can be considered. In this case, the transmission control information selection unit 14 and the control information transmission unit 15 are configured from the configuration illustrated in FIG. It can be omitted.
- each unit (processing means) of the first control device 10A shown in FIG. 3 is executed by a computer program that causes the computer constituting the first control device 10A to execute the above-described processes using the hardware. It can also be realized.
- FIG. 7 is a sequence diagram showing the operation of the control device according to the first embodiment of the present invention.
- first control apparatus 10A confirms whether or not the transmission timing of control information has arrived in accordance with the passage of a predetermined time and the conditions defined by the transmission policy (step S001).
- the first control device 10A When it is confirmed that the transmission timing of the control information has arrived (YES in step S001), the first control device 10A refers to the transmission policy set in advance, and transmits the control information to be transmitted to the control device 10B. Selection is made (step S002).
- the first control device 10A transmits the selected control information to the second control device 10B (step S003).
- control device 10B When receiving the control information from the first control device 10A, the control device 10B refers to the reception policy set in advance and selects the control information to be stored in the control information storage unit on the own device side (step) S004).
- the second control device 10B stores the selected control information in the control information storage unit on the own device side (step S005).
- control information is exchanged between the first control device 10A and the second control device 10B.
- the terminal A1 and the terminal A2 exist in the domain A managed by the first control apparatus 10A, and the terminal in the domain B managed by the second control apparatus 10B.
- the presence of B1 can be shared by the two control devices.
- the first control apparatus 10A sets control information for realizing communication from the terminal A1 to the terminal B1 in the domain A, and performs the second control.
- the device 10B can realize communication between the terminal A1 and the terminal B1.
- the second control device 10B knows that control information for realizing communication addressed to the terminal B1 from the terminal A1 is set in the domain A based on the control information sent from the first control device 10A. Can do.
- the second control device 10B generates control information for realizing communication addressed to the terminal B1 from the terminal A1 to the switch in the domain B, and the control sent from the first control device 10A is set.
- Information source information, exit switch information in domain B, and the like can be used.
- control device has been described as including the control information transmitting unit 15 and the control information receiving unit 16, but a control information exchanging unit that integrates both may be provided.
- control information exchange unit is a control device that selects control information conforming to the policy from the control information storage unit and transmits the control information to the other control device at predetermined time intervals.
- the control information exchanging unit transmits control information to the other control device targeting control information registered in the control information storage unit in the past predetermined period of the control information accumulated in the control information storage unit Control device to sort out.
- the policy storage unit holds a reception policy for selecting control information stored in the control information storage unit among control information received from the other control device
- the control information exchange unit refers to the reception policy, selects control information received from the other control device, and stores the control information in the control information storage unit.
- a control device that uses Border Gateway Protocol Version 4 (BGP4) as a transmission protocol of the control information.
- BGP4 Border Gateway Protocol Version 4
- Switch control unit 12 Control information storage unit 13
- Policy setting reception unit 14 Transmission control information selection unit 15
- Control information transmission unit 16 Control information reception unit 17
- Reception control information selection unit 20 Switch 30 External management Device 101
- Control unit 102 Policy storage unit 103
- Control information exchange unit 200 Communication node
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Abstract
Description
本発明は、日本国特許出願:特願2013-063578号(2013年3月26日出願)に基づくものであり、同出願の全記載内容は引用をもって本書に組み込み記載されているものとする。
本発明は、制御装置、通信システム、制御情報の送信方法及びプログラムに関し、特に、制御対象の通信ノードを集中制御する制御装置、通信システム、制御情報の送信方法及びプログラムに関する。
続いて、本発明の第1の実施形態について図面を参照して詳細に説明する。図2は、本発明の第1の実施形態の通信システムの構成を示す図である。図2を参照すると、制御対象のスイッチ20を制御する第1の制御装置10Aと、制御対象のスイッチ20を制御する第2の制御装置10Bと、が接続された構成が示されている。
[第1の形態]
(上記第1の視点による制御装置参照)
[第2の形態]
第1の形態の制御装置において、
自装置の制御対象の通信ノードと前記他の制御装置の制御対象の通信ノードとが接続されており、
前記ポリシーに従い、自装置の制御対象の通信ノードに接続している機器間の通信を実現する制御情報を選別する制御装置。
[第3の形態]
第1又は第2の形態の制御装置において、
自装置の制御対象の通信ノードと前記他の制御装置の制御対象の通信ノードとが接続されており、
前記ポリシーに従い、自装置の制御対象の通信ノードに接続している機器からのパケットを破棄させている制御情報を選別する制御装置。
[第4の形態]
第1から第3いずれか一の形態の制御装置において、
さらに、前記制御情報を蓄積する制御情報記憶部を備え、
前記制御情報交換部は、所定の時間間隔で、前記制御情報記憶部から前記ポリシーに適合する制御情報を選別して前記他の制御装置に送信する制御装置。
[第5の形態]
第4の形態の制御装置において、
前記制御情報交換部は、前記制御情報記憶部に蓄積された制御情報のうち、過去所定期間に前記制御情報記憶部に登録された制御情報を対象に、前記他の制御装置に送信する制御情報を選別する制御装置。
[第6の形態]
第4又は第5の形態の制御装置において、
前記ポリシー記憶部には、前記他の制御装置から受信した制御情報のうち前記制御情報記憶部に記憶する制御情報を選別するための受信用ポリシーが保持され、
前記制御情報交換部は、前記受信用ポリシーを参照して、前記他の制御装置から受信した制御情報を選別して前記制御情報記憶部に記憶する制御装置。
[第7の形態]
第1~第6いずれか一の形態の制御装置において、
前記制御情報の送信プロトコルとして、Border Gateway Protocol Version 4(BGP4)を用いる制御装置。
[第8の形態]
(上記第2の視点による通信システム参照)
[第9の形態]
(上記第3の視点による制御情報の送信方法参照)
[第10の形態]
(上記第4の視点によるプログラム参照)
なお、上記第8~第10の形態は、第1の形態と同様に、第2~第7の形態に展開することが可能である。
11 スイッチ制御部
12 制御情報記憶部
13 ポリシー設定受付部
14 送信制御情報選定部
15 制御情報送信部
16 制御情報受信部
17 受信制御情報選定部
20 スイッチ
30 外部管理装置
101 制御部
102 ポリシー記憶部
103 制御情報交換部
200 通信ノード
Claims (16)
- 制御対象の通信ノードに制御情報を設定することにより管轄するネットワークを制御する制御部と、
前記制御情報のうち他の制御装置に送信する制御情報を選別するためのポリシーを保持するポリシー記憶部と、
前記他の制御装置に、前記ポリシーを参照して選別した制御情報を送信する制御情報交換部と、
を備える制御装置。 - 自装置の制御対象の通信ノードと前記他の制御装置の制御対象の通信ノードとが接続されており、
前記ポリシーに従い、自装置の制御対象の通信ノードに接続している機器間の通信を実現する制御情報を選別する請求項1の制御装置。 - 自装置の制御対象の通信ノードと前記他の制御装置の制御対象の通信ノードとが接続されており、
前記ポリシーに従い、自装置の制御対象の通信ノードに接続している機器からのパケットを破棄させている制御情報を選別する請求項1又は2の制御装置。 - さらに、前記制御情報を蓄積する制御情報記憶部を備え、
前記制御情報交換部は、所定の時間間隔で、前記制御情報記憶部から前記ポリシーに適合する制御情報を選別して前記他の制御装置に送信する請求項1から3いずれか一の制御装置。 - 前記制御情報交換部は、前記制御情報記憶部に蓄積された制御情報のうち、過去所定期間に前記制御情報記憶部に登録された制御情報を対象に、前記他の制御装置に送信する制御情報を選別する請求項4の制御装置。
- 前記ポリシー記憶部には、前記他の制御装置から受信した制御情報のうち前記制御情報記憶部に記憶する制御情報を選別するための受信用ポリシーが保持され、
前記制御情報交換部は、前記受信用ポリシーを参照して、前記他の制御装置から受信した制御情報を選別して前記制御情報記憶部に記憶する請求項4又は5の制御装置。 - 前記制御情報の送信プロトコルとして、Border Gateway Protocol Version 4(BGP4)を用いる請求項1から6いずれか一の制御装置。
- 制御対象の通信ノードに制御情報を設定することにより管轄するネットワークを制御する制御部と、
前記制御情報のうち第2の制御装置に送信する制御情報を選別するためのポリシーを保持するポリシー記憶部と、
前記第2の制御装置に、前記ポリシーを参照して選別した制御情報を送信する制御情報交換部と、
を備える第1の制御装置と、
前記第1の制御装置から受信した制御情報を用いて、制御対象の通信ノードに設定する制御情報を作成する第2の制御装置と、
を含む通信システム。 - 前記第1の制御装置の制御対象の通信ノードと前記第2の制御装置の制御対象の通信ノードとが接続されており、
前記第1の制御装置は、前記ポリシーに従い、自装置の制御対象の通信ノードに接続している機器間の通信を実現する制御情報を選別する請求項8の通信システム。 - 前記第1の制御装置の制御対象の通信ノードと前記第2の制御装置の制御対象の通信ノードとが接続されており、
前記第1の制御装置は、前記ポリシーに従い、自装置の制御対象の通信ノードに接続している機器からのパケットを破棄させている制御情報を選別する請求項8又は9の通信システム。 - 前記第1の制御装置は、さらに、前記制御情報を蓄積する制御情報記憶部を備え、
前記制御情報交換部は、所定の時間間隔で、前記制御情報記憶部から前記ポリシーに適合する制御情報を選別して前記第2の制御装置に送信する請求項8から10いずれか一の通信システム。 - 前記制御情報交換部は、前記制御情報記憶部に蓄積された制御情報のうち、過去所定期間に前記制御情報記憶部に登録された制御情報を対象に、前記第2の制御装置に送信する制御情報を選別する請求項11の通信システム。
- 前記ポリシー記憶部には、前記第2の制御装置から受信した制御情報のうち前記制御情報記憶部に記憶する制御情報を選別するための受信用ポリシーが保持され、
前記制御情報交換部は、前記受信用ポリシーを参照して、前記第2の御装置から受信した制御情報を選別して前記制御情報記憶部に記憶する請求項11又は12の通信システム。 - 前記制御情報の送信プロトコルとして、Border Gateway Protocol Version 4(BGP4)を用いる請求項8から13いずれか一の通信システム。
- 制御対象の通信ノードに制御情報を設定することにより管轄するネットワークを制御する制御部と、
前記制御情報のうち他の制御装置に送信する制御情報を選別するためのポリシーを保持するポリシー記憶部と、を備えた制御装置が、
前記ポリシーを参照して、前記他の制御装置に送信する制御情報を選別するステップと、
前記他の制御装置に対し、前記選別した制御情報を送信するステップと、
を含む制御情報の送信方法。 - 制御対象の通信ノードに制御情報を設定することにより管轄するネットワークを制御する制御部と、
前記制御情報のうち他の制御装置に送信する制御情報を選別するためのポリシーを保持するポリシー記憶部と、を備えたコンピュータに、
前記ポリシーを参照して、前記他の制御装置に送信する制御情報を選別する処理と、
前記他の制御装置に対し、前記選別した制御情報を送信する処理と、
を実行させるプログラム。
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US14/777,443 US20160050654A1 (en) | 2013-03-26 | 2014-03-25 | Control apparatus, communication system, control information transmission method and program |
CN201480018810.8A CN105075198B (zh) | 2013-03-26 | 2014-03-25 | 控制装置、通信系统和控制信息发送方法 |
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