WO2004105331A1 - データ通信システム、通信装置、及びその通信プログラム - Google Patents
データ通信システム、通信装置、及びその通信プログラム Download PDFInfo
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- WO2004105331A1 WO2004105331A1 PCT/JP2004/007325 JP2004007325W WO2004105331A1 WO 2004105331 A1 WO2004105331 A1 WO 2004105331A1 JP 2004007325 W JP2004007325 W JP 2004007325W WO 2004105331 A1 WO2004105331 A1 WO 2004105331A1
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- WIPO (PCT)
- Prior art keywords
- communication
- communication means
- home agent
- mobile
- address
- Prior art date
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Classifications
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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
- H04W8/08—Mobility data transfer
- H04W8/10—Mobility data transfer between location register and external networks
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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]
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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
- H04L41/04—Network management architectures or arrangements
- H04L41/046—Network management architectures or arrangements comprising network management agents or mobile agents therefor
- H04L41/048—Network management architectures or arrangements comprising network management agents or mobile agents therefor mobile agents
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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
- H04W8/06—Registration at serving network Location Register, VLR or user mobility server
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W80/00—Wireless network protocols or protocol adaptations to wireless operation
- H04W80/04—Network layer protocols, e.g. mobile IP [Internet Protocol]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W84/00—Network topologies
- H04W84/005—Moving wireless networks
Definitions
- the present invention relates to a technology for communication using a mobile network, and more particularly to a technology for configuring a logical line by combining lines of communication means of the same kind and different types of services in a mobile packet communication network to secure a broadband access line.
- a technology for communication using a mobile network and more particularly to a technology for configuring a logical line by combining lines of communication means of the same kind and different types of services in a mobile packet communication network to secure a broadband access line.
- a response node 010 and a home agent 003 are connected to the Internet 002.
- Home agent 003 is also connected to network 005.
- the access network 004 is also connected to the network 006.
- a mopile network 01 1 is connected to the network 06.
- the inside of the mobile network 01 1 is composed of a mopile network node 0 9, a mobile network node 0 10 and a mopile router 0 07, and each is connected by a network 0 8.
- the mobile network 01 1 is connected to the external network 06 via the mobile router 07 as a gateway, and can access the Internet 02 via the access router 04.
- Home agent 0 0 3 is the mobile network 0 1 1 home network Belongs to the work.
- the mopile network 0 1 1 is a network in which all the constituent nodes move together.
- the conventional technology operates as follows.
- the mobile node 07 which is a connection node with the outside, moves to the CoA (Cai'e of Address: CoA) belonging to the subnet managed by the access router 04. Care agent address) and notifies the home agent 03 of the acquired CoA. With this address registration processing operation, the home agent 03 can grasp the position of the mobile router 07.
- CoA Ci'e of Address: CoA
- the home agent 0 3 receives it by proxy.
- the home agent 03 encapsulates the received packet as a payload, encapsulates it in a header with the destination as CoA and the source as the address of the home agent 03, and transfers it to the CoA.
- the mopile router 07 that has received the encapsulated packet extracts the packet in the pay-per-portion portion and transfers it to the mobile network node that is the actual destination.
- the packet transmitted from the mopile network node is encapsulated in a header with the address of the home agent 03 as the destination and the CoA as the source in the mopile network 07. Is forwarded to The home agent 003 which has received the encapsulated packet extracts the packet in the payload part and transfers it to the actual destination.
- the mopile network 01 1 logically exists as a subnet connected to the network 0 05 managed by the home agent 0 3. Then, without detecting movement, the mopile network node can communicate with the responding node 01.
- Mopile Network 0 1 1 is a home agent
- the address deletion processing operation is repeated at the point 0 03.
- the address registration processing operation is repeated, and the bidirectional tunnel is rebuilt, so that even when the network moves, the Mopile network node continues communication without detecting the movement. It is possible to do.
- Mobile 2007 also can use multiple communication interfaces to connect to external networks. 'The sub interface is used for backup in case of failure of the main interface.
- the communication method studied by the conventional NEMO has the problem that if the access line used by Mobile is a narrow band line, the band may not be sufficient for the generated traffic. there were.
- DDI Pocket Inc. AirH "128kbps Service Internet ⁇ URL: http :: www.ddipocket.co.jp/data/i-air.html>.
- a 128kbps packet communication service is provided by bundling up to four 32kbps lines using an ISDN line with no delay fluctuation from the wireless base station.
- the wireless network operator compares the wireless resource status in the cell with the amount of wireless resources required for the line at the time of the line opening request from the user. Generally, call admission control is performed. .
- a service is a communication service provided by a telecommunications carrier, and a heterogeneous service is not only when the telecommunications carrier providing the telecommunications service is different, but also for the same telecommunications carrier, such as the communication method and billing system Is a concept that includes different services.
- service y1 and service y2 are provided by carrier Y, and users of network N built in the train are provided with service X1, service provided by carrier X.
- service X1 and service y2 are provided by carrier Y, and users of network N built in the train are provided with service X1, service provided by carrier X.
- network N was communicating using service xl and X2 provided by telecommunications carrier X, but when network N moved to area B, service X2 was used. And the amount of data that can be sent is reduced. Further, when the network N moves to the area C, the service of the communication carrier X cannot be received, and the communication itself cannot be performed.
- network N has also subscribed to the service provided by telecommunications carrier Y.However, in the conventional technology, there is no technology for combining the services of different telecommunications carrier X and the services of telecommunications carrier ⁇ . The service of the telecommunications carrier Y was not received.
- the present invention has been made in view of the above problems, and has as its object to form a single logical line by appropriately combining lines of a plurality of communication means in which services of the same type and different types are mixed. Accordingly, it is an object of the present invention to provide a technology capable of securing a wideband access line in a packet switching network.
- Another object of the present invention is to provide a technology that can appropriately secure routes for generated traffic by appropriately combining routes (circuits) and that can effectively use access lines or wireless resources.
- a first invention for solving the above problems comprises a home agent, a response node communicable with the home agent, a mobile node, and a mobile network node communicable with the mobile node.
- Data communication system
- the mopile router The mopile router
- a management table in which an address assigned to the communication means and path information of the communication means are stored in association with each other;
- Transfer means for receiving a packet addressed to the response node from the mopile network node, selecting available communication means based on the management table, and transferring the packet to the home agent,
- Means for ascertaining the address assigned to the available communication means of the mobile station
- a management table in which the grasped address and the address path information are stored in association with each other;
- a second invention for solving the above problems is a data communication system including a home agent and a mopile router,
- a management table in which an address assigned to the communication means and path information of the communication means are stored in association with each other;
- Transfer means for receiving a packet, selecting an available communication means based on the management table, and transferring the packet to the home agent;
- a management table in which the grasped address and the address information of the address are stored in association with each other;
- Forwarding means for receiving a packet, selecting an address based on the management table, and forwarding the packet to this address,
- One logical line is configured by combining the lines of the plurality of communication means, and the home agent and the mobile router communicate with each other via this line.
- a data communication system comprising a home agent, a response node communicable with the home agent, a mopile router, and a mobile network node communicable with the mobile router.
- a management table storing path information including addresses assigned to the plurality of communication means
- Receiving a packet addressed to the response node from the mobile network node Means for selecting one or more communication means based on the management table and transferring the bucket to the home agent,
- the home agent is:
- Means for ascertaining the address assigned to the available communication means of the mobile station
- the Mopyle network node and the responding node communicate via a logically multiplexed line configured by combining the plurality of communication means between the Mopile router and the home agent.
- a fourth invention for solving the above-mentioned problems is the mobile communication device according to any one of the first invention to the third invention, wherein the mobile device detects a change in the connection state of the communication means being used, Means for notifying a home agent of the change in the connection state and the address assigned to the communication means,
- the home agent has means for updating the information in the management table for managing the address of the communication means of the mobile device based on the notification.
- a fifth invention for solving the above-mentioned problems is the mobile communication device according to any one of the first invention to the fourth invention, wherein the mopile router disconnects to the home agent before disconnecting the line of the connected communication means. Having means for notifying the address of the scheduled communication means,
- the home agent has means for deleting information related to the address of the communication means notified based on the notification from the management table.
- a sixth invention for solving the above-mentioned problems is the mobile communication device according to any one of the first to the fourth inventions, wherein the mobile router is configured to detect a disconnection of a line of the communication means being connected upon occurrence of an event.
- the home agent has means for updating information in a management table for managing mobile router addresses based on the notification.
- a seventh invention for solving the above problems is the mobile communication device according to any one of the first invention and the sixth invention, wherein the mobile router has means for responding to a packet from the home agent,
- the home agent sends a packet to multiple addresses of the mobile router periodically, and if there is no response to the packet, the home agent determines that the address is unusable and manages the mobile router address. Means for updating table information.
- An eighth aspect of the present invention for solving the above-mentioned problems is the mobile communication system according to any one of the first aspect to the seventh aspect, wherein the home agent can use the mobile device based on the location information of the mobile device.
- the route information in the management table of mobile station includes a communication means or a line type, a packet delay, Includes at least one of line bandwidth and usage information.
- a tenth invention for solving the above-mentioned problems is the invention according to any one of the first to ninth inventions, wherein the path information in the management table of the home agent includes a communication means or a line type, a packet delay, and a line bandwidth. Width, including at least one of the times when the next packet can be transmitted.
- the transfer means of the home agent does not cause packet loss based on the routing information in the management table. In this way, the transmission timing is calculated to select a transmittable address.
- the home agent selects a transmission timing and a transmission destination address by a different method for each QoS class of a received packet. .
- the mopile router selects a communication means by a different means for each QoS class of a received packet.
- a fourteenth invention for solving the above problems is the mobile communication device according to any one of the first to thirteenth inventions, wherein the mobile router is configured to monitor a traffic volume of a subordinate mopile network node; It has a means for connecting and disconnecting a channel with the outside as a reference.
- the method When transferring the bucket to the home agent, the method further includes a transfer unit that selects the communication unit based on the policy information and transfers the packet.
- Transfer means
- a usage rate of a plurality of communication means is determined between the home agent and the mobile terminal based on policy information.
- the policy information is information on a communication fee of each communication means.
- a seventeenth invention for solving the above-mentioned problems is the invention according to the fifteenth or sixteenth invention, wherein the transfer means is configured so that, based on the policy information, a total communication fee is minimized. Determine the usage ratio of.
- An eighteenth invention for solving the above-mentioned problems is characterized in that in any one of the above-mentioned fifteenth to seventeenth inventions, the communication means is a pay-per-use system,
- Equipped with N communication means from 1st to Nth
- the communication unit price of the first communication method is al, the bandwidth is Bl,
- the communication unit price of the second communication method is a2 (> al), the bandwidth is B2,
- the communication unit price of the Nth communication means is aN (> a (Nl)) and the bandwidth is BN Is given, if the bandwidth required for the current communication is C, and when the bandwidth is sequentially added from the first communication means,
- a nineteenth invention for solving the above-mentioned problems is characterized in that, in any one of the above-mentioned sixteenth to eighteenth inventions, the communication means of a flat-rate charging system is used in preference to the communication means of a pay-per-use system.
- a twenty-second invention for solving the above-mentioned problems is the above-mentioned one of the sixteenth to nineteenth inventions, wherein the communication means 1 to M are a flat-rate billing system,
- Communication means M to N are pay-as-you-go systems.
- Equipped with N communication means from 1st to Nth
- the communication unit price of the (M + 1) th communication means is a (M + l), the bandwidth is B (M + 1), and the communication unit price of the (M + 2) th communication means is a (M + 2) (> a ( M + l)), the band is B (M + 2),
- the communication unit price of the Nth communication means is aN (> a (N-l)) and the information of the communication charge of the band BN is given, and the band required for the current communication is C,
- the communication fee is changed according to date and time, and the usage rate of each communication means is changed accordingly.
- a twenty-second invention for solving the above-mentioned problems is any one of the above-mentioned sixteenth to twenty-first inventions.
- the mobile router and the home agent change the policy information based on the location information of the mobile router.
- the communication fee is changed according to the location, and the usage rate of each communication means is changed accordingly.
- a twenty-fourth invention for solving the above-mentioned problem is the invention according to any one of the sixteenth to twenty-third inventions, wherein the home agent, upon receiving the address notification from the mobile router, includes the policy information in the response message. It has a means for distributing policy information all over the mobile.
- the mobile router has an order control means for controlling an order of received packets.
- a twenty-sixth invention for solving the above-mentioned problems is the invention according to any one of the sixteenth to twenty-fifth inventions, wherein the home agent has an order control means for controlling an order of received packets.
- a twenty-seventh invention for solving the above-mentioned problems comprises a home agent, a response node communicable with the home agent, a mobile router, and a mobile network node communicable with the mobile server.
- Mobile communication in the communication system comprises a home agent, a response node communicable with the home agent, a mobile router, and a mobile network node communicable with the mobile server.
- a management table in which an address assigned to the communication means and path information of the communication means are stored in association with each other;
- Transferring means for receiving a packet addressed to the responding node from the mobile network node, selecting available communication means based on the management table, and transferring the bucket to the home agent;
- One logical line is configured by combining the lines of the plurality of communication means, and a packet addressed to the responding node is transferred from the mopile network node to the home agent via this line.
- the twenty-eighth invention that solves the above-mentioned problems is a home agent and a mobile router. And a plurality of communication means of a communication service in which the same kind and different kinds are mixed,
- a management template in which an address assigned to the communication means and path information of the communication means are stored in association with each other;
- Receiving means for receiving a packet selecting an available communication means based on the management table, and transferring the packet to the home agent.
- a logical line is formed, and communication with the home agent is performed via this line.
- a twenty-ninth invention for solving the above-mentioned problems is a home agent, a response node communicable with the home agent, a mobile node, and a mobile network node communicable with the mobile node.
- Mobile router in the configured data communication system,
- a management table storing path information including addresses assigned to the plurality of communication means
- the plurality of communication means are combined to form a logically multiplexed line, and a packet addressed to the responding node from the mopyle network node is transmitted to the home via the logically multiplexed line. Transfer to agent.
- a thirtieth invention for solving the above-mentioned problems is the invention according to any one of the twenty-seventh to twenty-ninth inventions, wherein: a means for detecting a change in a connection state of the communication means being used;
- the address of the communication means to be disconnected is provided to the home agent before disconnecting the line of the connected communication means. Is provided. ⁇
- a thirty-second invention for solving the above-mentioned problems is any one of the twenty-seventh to thirty-first inventions.
- a means is provided for notifying the home agent of the address of the communication means expected to be disconnected.
- a thirty-third invention for solving the above-mentioned problem is the invention according to any one of the twenty-seventh to thirty-second inventions, wherein the means for responding to a packet for investigating an available address from a home agent is provided. Have.
- the route information of the mobile router management table includes communication means or line type, packet delay, It includes at least one of bandwidth and usage information.
- a communication means is selected by a different means for each QoS class of a received packet.
- a thirty-sixth invention for solving the above-mentioned problems is a method according to any one of the twenty-seventh to thirty-fifth inventions, wherein the means for monitoring the traffic volume of the subordinate mobile network node comprises:
- a thirty-seventh invention for solving the above-mentioned problems is the invention according to any one of the twenty-seventh to thirty-sixth inventions, wherein: a management table for managing policy information associated with each of the communication means; And transferring the packet by selecting the communication means based on the policy information when transferring the packet to the agent, and determining the usage rate of the plurality of communication means based on the policy information.
- the policy information is information on a communication fee of each communication means.
- a thirty-ninth invention for solving the above-mentioned problems is characterized in that, in the thirty-seventh or thirty-eighth invention, the transfer means is configured so that a total communication charge is minimized based on the policy information. Determine the usage ratio.
- a 40th invention for solving the above-mentioned problems is characterized in that, in any one of the 37th to 39th inventions, the communication means is a pay-per-use system, Equipped with N communication means from 1st to Nth,
- the communication unit price of the first communication method is al, the bandwidth is Bl,
- the communication unit price of the second communication method is a2 (> al), the bandwidth is B2,
- the communication unit price of the Nth communication means is aN (> a (Nl)) and the information on the communication charge of the bandwidth is BN, and the bandwidth required for the current communication is C, the first communication means When the bandwidth is added sequentially from
- the communication means of a fixed charge system is used in preference to the communication means of a pay-per-use system.
- a twenty-second invention for solving the above-mentioned problems is the above-mentioned one of the thirty-seventh to forty-first inventions, wherein the communication means 1 to ⁇ are fixed-rate billing systems,
- Communication means ⁇ ⁇ ⁇ is a pay-as-you-go system
- the communication unit price of the (M + 1) th communication means is a (M + l), the bandwidth is B (M + 1), and the communication unit price of the (M + 2) th communication means is a (M + 2) (> a ( M + l)), the band is B (M + 2),
- the communication unit price of the Nth communication means is aN (> a (N-l)) and the information of the communication charge of the band BN is given, and the band required for the current communication is C,
- the communication fee is changed according to date and time, and the usage rate of each communication means is changed accordingly.
- a forty-fourth invention for solving the above-mentioned problems is the invention according to any one of the thirty-seventh to forty-third inventions, wherein the policy information is changed based on the location information of the mobile pile router.
- the communication fee is changed according to the location, and the usage rate of each communication means is changed accordingly.
- a forty-sixth invention for solving the above-mentioned problems is the mobile communication device according to any one of the thirty-seventh to forty-fifth inventions, wherein the mobile router has an order control means for controlling an order of received packets.
- a 47th invention for solving the above-mentioned problems is a data processing system comprising a home agent, a response node communicable with the homepage end, a mobile router, and a mobile network node communicable with the mobile router.
- a home agent in a communication system comprising a home agent, a response node communicable with the homepage end, a mobile router, and a mobile network node communicable with the mobile router.
- a management table in which the grasped address and the address information of the address are stored in association with each other;
- Transfer means for receiving a packet addressed to the mopile network node from the responding node, selecting an address based on the management table, and transferring the packet to the address;
- a 48th invention for solving the above-mentioned problems is a home agent in a data communication system comprising a home agent and a mobile router, wherein the home agent is a communication means for a communication service in which the same kind and different types of mobile services are mixed.
- Use Means for grasping an address assigned to a possible communication means a management table in which the grasped address and the address information of the address are stored in association with each other;
- Transfer means for receiving a packet, selecting an address based on the management table, and transferring the bucket to the address;
- a single logical line is formed by combining the plurality of communication means with the mopile router, and communication is performed via this line.
- a 49th invention for solving the above-mentioned problem is a data comprising a home agent, a response node communicable with the home agent, a mobile router, and a mobile network node communicable with the mobile router.
- a home agent in a communication system a home agent in a communication system
- Communication is performed with the mobile router via a logically multiplexed line configured by combining the plurality of communication means.
- a fiftyth invention for solving the above-mentioned problems is characterized in that in any one of the above-mentioned forty-seventh to forty-ninth inventions, the change in the connection state from the moment of mobile communication and the address assigned to the communication means.
- the notification is made based on the notification of the address of the communication means scheduled to be disconnected from the mobile station.
- a fifty-second invention for solving the above-mentioned problems is the invention according to any one of the forty-seventh to fifty-first inventions, wherein the address of a communication means that is expected to be disconnected from the mobile station is passed. It has means to update information in the management table that manages mobile router addresses based on knowledge.
- the invention according to any one of the forty-seventh to fifty-second inventions, comprising means for periodically transmitting a packet to a plurality of addresses of the mobile router,
- a fifty-fourth invention for solving the above-mentioned problems is the invention according to any one of the forty-seventh to fifty-third inventions, wherein the communication means that can use the mobile router is based on the mobile location information. It has means for estimating an address, and means for updating information in a management table for managing addresses of mobile devices based on the estimation.
- a fifty-fifth invention for solving the above-mentioned problems is the invention according to any one of the forty-seventh to fifty-fourth inventions, wherein the path information of the management table of the home agent includes communication means or line type, packet delay, and line Bandwidth, including at least one of the times when the next packet can be transmitted. '
- the transfer means of the home agent generates a packet loss based on the route information of the management table. This is a means to calculate the transmission timing and select an address that can be transmitted so that the transmission is not performed.
- a transmission timing and a destination address are selected by means different for each QoS class of a received packet.
- a fifty-eighth invention for solving the above-mentioned problems is a management table for managing policy information associated with each mobile address in any one of the forty-seventh to fifty-seventh inventions,
- the mobile device When transferring a packet to the mobile router, the mobile device has a transfer unit that selects an address of the mobile router based on the policy information and transfers the packet.
- said policy information is information on a communication fee of each communication means.
- a 60th invention for solving the above-mentioned problems is the 58th or 59th invention, wherein the transfer means, based on the policy information, controls each communication means so that a total communication fee is minimized. Determine the usage ratio.
- a sixteenth invention for solving the above problems is the invention according to any one of the fifty-eighth to the sixtyth inventions, wherein the communication means is a pay-per-use system,
- Equipped with N communication means from 1st to Nth
- the communication unit price of the first communication method is al, the bandwidth is Bl,
- the communication unit price of the second communication method is a2 (> al), the bandwidth is B2,
- the communication unit price of the Nth communication means is aN (> a (Nl)) and the information on the communication charge of the bandwidth is BN, and the bandwidth required for the current communication is C, the first communication means When the bandwidth is added sequentially from
- a sixty-second invention for solving the above-mentioned problems uses the communication means of the flat-rate billing system in preference to the communication means of the fixed-rate billing system in any one of the inventions of the above-mentioned inventions 58 to 61.
- a sixth invention to solve the above-mentioned problem is the invention according to any one of the above-mentioned inventions 58 to 62, wherein the communication means 1 to ⁇ are fixed-rate billing systems,
- Communication means ⁇ ⁇ ⁇ is a pay-as-you-go system
- the communication unit price of the (M + 1) th communication means is a (M + l), the bandwidth is B (M + 1), and the communication unit price of the (M + 2) th communication means is a (M + 2) (> a ( M + l)), the band is B (M + 2),
- the communication unit price of the Nth communication means is aN (> a (N-l)) and the information of the communication charge of the band BN is given, and the band required for the current communication is C,
- any one of the above-mentioned inventions 58 to 63 the communication fee is changed according to the date and time, and the usage rate of each communication means is changed accordingly. I do.
- the policy information is changed based on the location information of the mobile pile router.
- the communication fee is changed according to the location, and the usage rate of each communication means is changed accordingly. I do.
- the home agent when the home agent receives the notification of the address from the mopile router, the home agent includes the policy information in the response message, It has a means to distribute policy information overnight.
- a thirty-eighth invention for solving the above-mentioned problems includes the order control means for controlling the order of received packets in any one of the above-mentioned inventions.
- a sixty-ninth invention for solving the above-mentioned problems is a data comprising a home agent, a responding node capable of communicating with the home agent, a mopile router, and a mopile network node capable of communicating with the mobile unit.
- a mobile program in the communication system is a data comprising a home agent, a responding node capable of communicating with the home agent, a mopile router, and a mopile network node capable of communicating with the mobile unit.
- the program is mobile roux
- a packet addressed to the responding node is received from the mopile network node, and is usable based on a management table in which an address assigned to the communication unit and path information of the communication unit are stored in association with each other.
- a communication means is selected to function as a transfer means for transferring the bucket to the home agent, a line of the plurality of communication means is combined to form one logical line, and the mobile device is connected via the line.
- a packet addressed to the responding node is transferred from the network node to the home agent.
- a 70th invention for solving the above problems is a mobile communication program in a data communication system including a home agent and a mobile router,
- a packet is received, and an available communication means is selected based on a management table in which an address assigned to the communication means and path information of the communication means are stored in association with each other to store the bucket.
- One logical line is configured by combining the lines of the plurality of communication means, and communication with the home agent is performed via this line.
- a seventy-first invention for solving the above-mentioned problems is a data processing system comprising: a home agent; a responding node communicable with the home agent; a mobile router; and a mobile network node communicable with the mobile router.
- a program for a mopile router in a communication system comprising: a home agent; a responding node communicable with the home agent; a mobile router; and a mobile network node communicable with the mobile router.
- the above program is mobile night
- a management table storing route information including addresses assigned to the plurality of communication means
- a logically multiplexed line is configured by combining the plurality of communication means, and a packet addressed to the response node from the mobile network node is transmitted to the home agent via the logically multiplexed line.
- a seventy-second invention for solving the above-mentioned problems is the invention according to any one of the sixty-ninth to seventy-first inventions, wherein the program detects a change in the connection state of the communication means in use by using the mobile router. And a function of notifying the home agent of the change in the connection state and the address assigned to the communication means.
- a seventy-third invention for solving the above-mentioned problems is the invention according to any one of the sixty-ninth to seventy-second inventions, wherein the program transmits the mobile router to the home agent before disconnecting the line of the connected communication means. Function to notify the address of the communication means to be disconnected.
- a seventy-fourth invention for solving the above-mentioned problems is the invention according to any one of the sixty-ninth to seventy-third inventions, wherein the program is adapted to execute a mobile router and an event which can predict the disconnection of the line of the communication means being connected. When this occurs, it functions as a means to notify the home agent of the address of the communication means that is expected to be disconnected.
- a seventy-fifth invention for solving the above-mentioned problems is the invention according to any one of the sixty-ninth to seventy-fourth inventions, wherein the program is a program for searching a mobile router for a usable address from a home agent. Function as a means to respond to
- a 76th invention for solving the above-mentioned problems is the invention according to any one of the 69th invention to the 75th invention, wherein the route information of the management table of Mopille overnight includes the type of communication means or line, the packet delay, Includes at least one of line bandwidth and usage information.
- a 77th invention for solving the above-mentioned problem is the communication device according to any of the 69th to 76th inventions, wherein a communication means is selected by a different means for each QoS class of the received packet.
- the 78th invention for solving the above-mentioned problems is the invention according to any one of the 69th to the 77th inventions, wherein the program is a mopile router,
- a seventy-ninth invention for solving the above-mentioned problems is the invention according to any one of the sixty-ninth to seventy-eighth inventions, wherein the program transmits a mobile router to each of the communication means when transferring a packet to a home agent.
- the communication means is selected based on the policy information associated with the communication means to function as a transfer means for transferring a packet, and the usage rates of the plurality of communication means are determined based on the policy information.
- An 80th invention for solving the above-mentioned problems is the 79th invention according to the 79th invention, wherein said policy information is information on a communication fee of each communication means.
- An eighteenth invention for solving the above-mentioned problems is characterized in that in the above-mentioned 79th or 80th invention, the transfer means is configured to control each communication means based on the policy information so that a total communication fee is minimized. Determine the usage ratio.
- An eighty-second invention for solving the above-mentioned problems is characterized in that in any one of the above-mentioned seventy-ninth to eighteenth inventions, the communication means is a pay-per-use system,
- Equipped with N communication means from 1st to Nth
- the communication unit price of the first communication method is al, the bandwidth is Bl,
- the communication unit price of the second communication method is a2 (> al), the bandwidth is B2,
- the communication unit price of the Nth communication means is aN (> a (Nl)) and the information on the communication charge of the bandwidth is BN, and the bandwidth required for the current communication is C, the first communication means When the bandwidth is added sequentially from
- An eighty-third invention for solving the above-mentioned problems is characterized in that, in any one of the above-mentioned 79th to 82nd inventions, the communication means of a flat-rate billing system is used in preference to the communication means of a pay-per-use system.
- An eighty-fourth invention for solving the above-mentioned problems is the above-mentioned one of the seventy-ninth to eighteenth inventions, wherein the communication means 1 to ⁇ are fixed-rate billing systems, Communication means M to N are pay-as-you-go systems.
- Equipped with N communication means from 1st to Nth
- the communication unit price of the (M + 1) th communication means is a (M + l), the bandwidth is B (M + 1), and the communication unit price of the (M + 2) th communication means is a (M + 2) (> a ( M + l)), the band is B (M + 2),
- the communication unit price of the Nth communication means is aN (> a (N-l)) and the information of the communication charge of the band BN is given, and the band required for the current communication is C,
- An 85th invention for solving the above-mentioned problems is the invention according to any one of the 79th to 84th inventions, wherein the communication fee is changed according to date and time, and the usage rate of each communication means is changed accordingly.
- An 86th invention for solving the above-mentioned problems is the invention according to any one of the 79th to 85th inventions, wherein policy information is changed based on mobile location information.
- An 87th invention for solving the above-mentioned problems is the invention according to any of the 79th to 86th inventions, wherein the communication fee is changed according to the location, and the usage rate of each communication means is changed accordingly. .
- An eighty-eighth invention for solving the above-mentioned problems is the invention according to any one of the sixty-ninth to eighty-seventh inventions, wherein the program causes the mobile router to function as order control means for controlling the order of received packets.
- An eighty-ninth invention for solving the above problems comprises a home agent, a response node communicable with the home agent, a mobile node, and a mobile network node communicable with the mobile node.
- a home agent program in a data communication system The program has a home agent,
- a packet addressed to the mobile network node is received from the responding node, and an address is selected based on a management table in which the grasped address and the address routing information are stored in association with each other.
- One logical line is formed by combining the addresses of the plurality of communication means, and a packet of the mobile network node is transferred from the responding node to the mobile router via the line.
- a 90th invention for solving the above problems is a home agent program in a data communication system including a home agent and a mobile router,
- the program has a home agent
- the device receives a packet, selects an address based on a management table in which the grasped address is associated with the path information of the address and stores the address, and functions as a transfer unit that transfers the packet to the address.
- a single logical line is formed by combining the plurality of communication means with the mobile router, and communication is performed via this line.
- a ninth invention for solving the above-mentioned problems comprises a home agent, a response node communicable with the home agent, a mobile router, and a mobile network node communicable with the mobile router.
- a home agent program in a data communication system
- the program has a home agent
- a management table in which path information including the grasped address is stored Receiving a bucket addressed to the mobile network node from the responding node, selecting one or more addresses of the mobile router based on the management table, and functioning as means for transferring the bucket to this address;
- Communication is performed with the mobile station via a logically multiplexed line configured by combining the plurality of communication means.
- a ninth invention for solving the above problems is the invention according to any one of the 89th to 91st inventions, wherein the program assigns a home agent to a change in a connection state from a mobile router and to the communication means. Based on the notification of the address, the function of updating the information in the management table that manages the address of the communication means of the mobile router is made to function.
- a ninth invention for solving the above-mentioned problems is the invention according to any one of the 89th to 92nd inventions, wherein the program notifies the home agent of an address of a communication means scheduled to be disconnected from the mobile router. Then, it functions as a means for deleting the information related to the notified address of the communication means from the management table.
- a ninety-fourth invention for solving the above-mentioned problems is the invention according to any one of the eighty-ninth to ninety-third inventions, wherein the program specifies a home agent and an address of a communication means expected to be disconnected from the mobile station. Based on the notification, it functions as a means for updating the information in the management table for managing the mobile router address.
- a ninety-fifth invention for solving the above-mentioned problems is the invention according to any one of the eighty-ninth to ninety-fourth inventions, wherein the program comprises a home agent,
- the address is determined to be unusable, and the function of updating the information in the management table that manages the address of the mobile router is performed.
- a ninth invention for solving the above-mentioned problem is the ninth invention according to any one of the 89th to 95th inventions, wherein
- Means for estimating the address of the communication means that can be used by the mopile router based on the location information of the mobile router; Based on the above guess, it functions as means for updating information in a management table for managing addresses of mobile routers.
- a 97th invention for solving the above-mentioned problems is the invention according to any one of the 89th to the 96th inventions, wherein the path information of the management table of the home agent includes communication means or line type, packet delay, line bandwidth. Width, including at least one of the times when the next packet can be transmitted.
- the 98th invention for solving the above-mentioned problems is the invention according to any of the 89th to 97th inventions, wherein the transfer means of the home agent generates a packet loss based on the route information of the management table. This is a means to calculate the transmission timing and select an address that can be transmitted so that the transmission is not performed.
- a transmission timing and a transmission destination address are selected by means different for each QoS class of a reception packet.
- the 100th invention for solving the above-mentioned problems is the invention according to any one of the 89th to 99th inventions, wherein the program transmits a packet to the mobile router when transferring a packet to the mobile router. Selecting the mobile address and transmitting the packet based on the policy information associated with each of the evening addresses;
- the usage rate of a plurality of communication means is determined between the mobile router and the mobile device based on the policy information.
- the policy information is information on a communication fee of each communication means.
- a 100th invention for solving the above-mentioned problem is the 100th invention or the 101st invention, wherein the transfer means minimizes a total communication fee based on the policy information.
- the usage ratio of each communication means is determined.
- a tenth invention for solving the above-mentioned problems is the above-mentioned one of the first to tenth inventions, wherein the communication means is a metered billing system,
- Equipped with N communication means from 1st to Nth
- the communication unit price of the first communication method is al, the bandwidth is Bl,
- the communication unit price of the second communication method is a2 (> al), the bandwidth is B2,
- the communication unit price of the Nth communication means is aN (> a (Nl)) and the information on the communication charge of the bandwidth is BN, and the bandwidth required for the current communication is C, the first communication means When the bandwidth is added sequentially from
- a tenth invention for solving the above-mentioned problems is the communication system of any one of the above-mentioned first to tenth inventions, wherein communication means of a fixed charge system is used in preference to communication means of a pay-per-use system.
- a 105th invention for solving the above-mentioned problem is the above-mentioned 100th to 104th inventions, wherein the communication means 1 to ⁇ are fixed-rate billing systems, and the communication means ⁇ to ⁇ It is a pay-as-you-go system,
- the communication unit price of the (M + 1) th communication means is a (M + l), the bandwidth is B (M + 1), and the communication unit price of the (M + 2) th communication means is a (M + 2) (> a ( M + l)), the band is B (M + 2),
- the communication unit price of the Nth communication means is aN (> a (N-l)) and the communication fee information of the band BN is given,
- a sixty-sixth invention for solving the above-mentioned problems is characterized in that in any one of the above-mentioned 100th to 104th inventions, the communication fee is changed according to date and time, and the usage rate of each communication means is changed accordingly.
- a seventy-seventh invention for solving the above-mentioned problems is characterized in that, in any one of the above-mentioned 100th to 105th inventions, policy information is changed based on location information of a mobile station.
- a 108th invention for solving the above-mentioned problems is the communication system according to any one of the 100th to 106th inventions, wherein the communication fee is changed according to the location, and the usage rate of each communication means is changed accordingly.
- a tenth aspect of the present invention for solving the above-mentioned problems is as described in any one of the above-mentioned 100th to 107th aspects, wherein the program, upon receiving the notification of the address from the mobile router, includes the policy information in the response message. It will function as a means of distributing policy information to mobile routers.
- a tenth aspect of the present invention for solving the above-mentioned problems is the program according to any one of the 89th to 109th aspects, wherein the program has an order control means for controlling the home agent to control the order of received packets.
- the mopile router 105 can use a plurality of wireless lines 106, 107, 108, 109. These wireless lines 106, 107, 108 and 109 are lines in which services of the same type and different types are mixed.
- the mobile router 105 monitors the status of the wireless lines 106, 107, 108, and 109, and manages the address assigned to the communication means of the wireless lines 106, 107, 108, and 109 along with the route information that is the status information. And manage the lines currently available.
- the mobile terminal 105 appropriately combines the lines currently available based on the user's policy information, etc., and establishes one logical line between the mobile terminal 105 and the home agent. Constitute.
- a mobile router can efficiently use a plurality of lines, and as a result, a mobile network within a mobile network that moves.
- An excellent effect is achieved that a communication band can be flexibly provided according to the status of a node.
- the mopile router can efficiently use a plurality of access lines by forming a single logical line by combining lines of a plurality of communication means. It has an excellent effect that it is possible to flexibly provide a communication band according to the situation of the mopile network node in the network.
- the home agent since the home agent knows the address of the communication means that can be used in the mobile environment, it is possible to efficiently use a plurality of access lines.
- the address to which the packet is transmitted is selected based on the policy information, data transmission / reception reflecting the user's intention can be performed.
- the policy information is the communication fee of the user
- one logical line can be configured by combining the lines intended for the target value of the communication fee of the user.
- the present invention when updating the route information, estimates the updated transmission delay by referring to the transmission history after the time at which the update becomes effective and the updated route information, and determines the route (address). Since this is reflected in the packet scheduling for transmitting the selected packet, it is possible to prevent a decrease in the multiplexing efficiency in a system in which the state of each path (address) dynamically changes.
- FIG. 1 is a diagram showing a configuration of a communication network according to the present invention.
- FIG. 2 is a diagram showing the configuration of the mobile router.
- FIG. 3 is a diagram showing the configuration of a home agent.
- Figure 4 shows the communication sequence of the mobile network node, mobile router, home agent, and responding node.
- FIG. 5 is a diagram showing an example of a management table held by mobile router.
- FIG. 6 is a diagram showing an example of a management table held by the home agent.
- FIG. 7 is a diagram showing the 'operation' of the transmission interface selector 329.
- FIG. 8 is a diagram showing the operation of the destination selection & timing control section 4 21.
- FIG. 9 is a diagram showing an example of a management table including charging information held by the mobile agent and the home agent.
- FIG. 0 is a diagram showing another example of the management table including the charging information held by the mobile router and the home agent.
- FIG. 11 is a flowchart showing a mobile router transmission interface selection algorithm and a home agent destination address selection algorithm.
- FIG. 12 is a diagram showing a configuration of a path between nodes.
- FIG. 13 is a diagram showing the configuration of the transmitting node.
- FIG. 14 is a diagram showing the bucket processing timing at the transmitting node and the receiving node.
- FIG. 15 is an operation flowchart of the scheduling unit.
- Fig. 16 is a diagram showing another bucket processing timing at the transmitting node and the receiving node.
- FIG. 17 is an operation flowchart of another scheduling unit.
- FIG. 18 is a diagram for explaining a conventional technique.
- FIG. 19 is a diagram showing an example of a management table held in the mobile station.
- FIG. 20 is a diagram showing an example of a management table held by the mobile router.
- FIG. 21 is a diagram showing an example of the management table held by the home agent.
- FIG. 22 is a diagram showing an example of a management table held by the home agent.
- FIG. 23 is a diagram illustrating an example of a management table held by Mopil's ruler.
- FIG. 24 is a diagram showing an example of a management table held by mobile router.
- FIG. 25 is a diagram showing an example of a management table held by mobile router.
- FIG. 26 is a diagram showing the operation of the transmission interface selection unit 329.
- FIG. 27 is a diagram for explaining the operation of the embodiment.
- FIG. 28 is a diagram showing an example of a management table stored in mobile router.
- FIG. 29 is a diagram for explaining the operation of the embodiment.
- FIG. 30 is a diagram for explaining the operation of the embodiment.
- FIG. 31 is a diagram for explaining the operation of the embodiment.
- FIG. 32 is a diagram showing an example of the management table held by the mobile router.
- FIG. 33 is a diagram showing an example of a management table stored in the mobile station.
- FIG. 34 is a diagram for explaining the operation of the embodiment.
- FIG. 35 is a diagram showing an example of the management table held by the mobile router.
- FIG. 36 is a diagram for explaining the operation of the embodiment.
- FIG. 37 is a diagram for explaining a conventional technique. BEST MODE FOR CARRYING OUT THE INVENTION
- FIG. 1 is a diagram showing the overall configuration of the present embodiment.
- an embodiment of the present invention is a network configuration including a mobile network 104 and packet switching networks 113 to 115.
- the mobile network 104 includes, for example, a network constructed in a vehicle such as a train or a car.
- the mopile network 104 consists of an arbitrary number of terminals (hereinafter referred to as mobile network nodes) 101, 102, 103 and mobile routers 105.
- the packet switching network 115 there are a router 116, a home agent 117, and an arbitrary number of responding nodes 118 to 120. Note that the packet exchange network 115 and the packet exchange networks 113 and 114 are connected.
- the mopile router 105 is connected to the access line terminal station 110 using the wireless lines 106 and 107, to the access line terminal station 111 using the wireless line 108, and to the wireless line 1
- the access line terminating stations 1 1 and 2 are connected to each other by using 09.
- the access line terminal stations 110 and 111 are connected to the packet switching network 113, and the access line terminal station 112 is connected to the packet switching network 114.
- the wireless lines 106, 107, 108, and 109 are lines in which the same type and different types of services are mixed, and the wireless lines 106, 107, 108, 1 One logical line is formed by combining 09 in a timely manner.
- a service refers to a communication service provided by a telecommunications carrier
- a heterogeneous service refers to a communication method not only when the telecommunications service provider that provides the communication service is different, but also when the same telecommunications service provider. It is a concept that also includes services with different charging systems and the like.
- the access line is a wireless line, but the type of the access line may be a wired line.
- the number of lines terminated by the access line terminating station, the number of access line terminating stations used to connect to one packet switching network, and between the mobile station 105 and the packet switching network 115 The number of packet-switched networks that pass through is optional. Also, it may be nested such that a mopile network exists in a mopile network.
- FIG. 2 is a diagram showing the configuration of the mobile router 105.
- the mobile router 105 is connected to an input / output terminal 301 connected to the mobile network 104, a communication interface 310 connected to the input / output terminal 301, and an access line.
- Storage unit 3 2 5 for storing information
- line management & address acquisition unit 3 2 4 for detecting movement of mopile network 104 and acquiring a new address, and signaling message addressed to home agent 1 17
- Raw A packet generating unit 326 that encapsulates the bucket, a queuing unit 328 that enqueues the packet, and a queuing unit 328 that queues the packet if the packet cannot be transmitted immediately. It comprises a transmission interface selection unit 329 for selecting an appropriate transmission interface, and a traffic measurement unit 330.
- the management table stored in the storage unit 325 includes the route information as shown in FIG. Is a table in which is stored.
- the route information is the address assigned to the communication interface and the line information of the communication interface.
- the line information is, for example, information such as the type of communication interface, the bandwidth of the line, and the state of communication availability.
- the traffic measurement unit 330 monitors the communication intab ace 311 to measure the traffic flowing into the mobile network and the traffic flowing out of the mobile network, and if necessary, the line management and address acquisition unit. Instruct 3 2 4 to disconnect and connect the line.
- FIG. 3 is a diagram showing a configuration of the home agent 1 17.
- the home agent 1 17 includes an input / output terminal 4 01 on the packet switching network side, a communication interface 4 1 1 for inputting / outputting to the input / output terminal 4 0 1, and a bucket classification unit 4 2 for classifying the input packet.
- a bucket analysis unit 429 for analyzing the contents when the input packet is a signaling packet
- a storage unit 426 for storing information such as a management table
- a signaling packet generation unit 4 for returning a response to the signaling.
- the management table stored in the storage unit 426 is a table that stores the route information shown in FIG.
- the route information is an address assigned to the communication interface of the communicable router 1005, and line information of the communication interface (address).
- the line information is, for example, information such as the type of communication interface, the bandwidth of the line, and the time when the next packet can be transmitted.
- FIG. 5 is a diagram showing a registration processing operation and an address deletion processing operation, and a sequence of data communication between a mobile network node and a response node.
- FIG. 5 shows an example of a management table held by the mobile network 105 as described above.
- FIG. 6 is a diagram showing an example of the management table held by the home agent 117 as described above.
- the processing in the present embodiment includes a path setting processing 2 31 triggered by an event of line connection 201 and a path release processing 2 triggered by an event of line disconnection 210. 33, and data communication processing for carrying out data communication between the mobile network node and the responding node.
- the data communication process 2 32 is performed after the route setting process 2 31 has been completed.
- the purpose of the route setting process 2 3 1 and the route release process 2 3 3 is to enable the mobile router 105 to use the available address information between the mobile agent 105 and the home agent 117. (Addresses assigned to the communication interfaces 312 to 315, hereinafter simply referred to as care-of addresses or addresses) and the path information of the addresses.
- the route setting process 2 3 1 and the route release process 2 3 3 are defined as a change in the address information of the communication interface of the mobile network 105 such as line connection 201 or line disconnection 210. This is performed every time the state of the line changes. Then, when the address changes or the state of the line changes, the address registration processing operation 22 1 in the line connection 201 and the address deletion processing operation 222 in the line disconnection 210 are performed.
- the first example of the change in the line state is a case where the mobile network 104 actively performs the line connection 201.
- the mobile router 105 actively connects to the line. 0 Do 1
- the mobile terminal 105 performs the line connection 201 by the line management & address acquisition unit 324 using the communication interface 321 to 315.
- line information used for the route information is obtained. For example, the type of communication interface, the bandwidth of the line, and the like.
- address registration processing operation 2 2 1 is performed.
- a second example of a change in the line state is a case where the mobile network 104 actively disconnects the line 210.
- the address deletion processing operation 222 is performed in advance.
- the Mopyle router 105 disconnects the line with respect to the communication interfaces 3 1 to 3 15 recorded in the storage unit 3 2 4 by the line management & address acquisition unit 3 2 4, and the storage unit 3 2 5 Delete the corresponding address and line information on the management table of.
- the traffic measuring unit 330 monitors the traffic between the mobile station and the home agent via the communication interface 311 in both directions, and when the traffic volume falls below a certain threshold value. Notifies the line management & address acquisition unit 3 2 4 and disconnects the connected line. Conversely, if the traffic volume exceeds a certain threshold, it is possible to notify the line management & address acquisition unit 3 2 4 and connect a new line.In this case, the address registration processing operation is performed. Done. This operation makes it possible to save radio resources in the cell, and when a mobile network is configured in a train such as a Shinkansen, the possibility that voice communications individually performed by passengers can be reduced.
- a third example of a change in line condition is that the mobile router This is the case when the line state changes. Regardless of the intention of Mobile One Night 105, events such as changes in coverage conditions due to changes in radio resource conditions and changes in surrounding structures in the case of wireless, and events such as unplugging and unplugging of wired cables in the case of wired Line disconnection and line reconnection occur due to the congestion.
- Mobile Network 105 In preparation for these events, Mobile Network 105 periodically checks the line status of each communication interface, or obtains line management and address information by notifying the communication interface of a change in line status.
- the unit 3 2 4 detects a change in the state of the line.
- the line information of the route information is obtained at the same time. For example, the type of communication interface, the bandwidth of the line, and the combination thereof.
- an address registration processing operation 2 2 1 is performed. If the change in the line status is a line disconnection, the address deletion processing operation 222 is performed by using the communication interface if another communication interface is available by referring to the storage unit 325. Do.
- a fourth example of a change in line state is when the mobile router 105 knows that a line disconnection has occurred before the actual line disconnection. In this case, the address deletion processing operation 22 is performed prior to the line disconnection.
- the mobile router 105 can know the line state change in advance, and therefore notifies the home agent 117 before the line state change. .
- mobile roaming device 105 uses a wireless LAN and an IMT 2000 wireless line as an access line, and may move out of the wireless LAN communication range within a few seconds. This is the case when you know in advance.
- the address deletion processing operation 222 is performed by using some event such as position information, opening / closing of a train door, or moving speed as a trigger.
- Fifth example of changing line status> The fifth example of the change in the line state is when the home agent takes the initiative in responding to the change in the line state (change in address information), not the mobile situation. In other words, the home agent 1 17 examines a change in the line state and updates the address information, and the mobile router 105 shares the address information based on the notification from the home agent.
- the home agent 117 periodically sends a bucket to the address of the mobile router 105 registered in the management table to test whether the address can be used by using ping or the like, using ping or the like. It presumes that an address that does not respond from mobile router 105 is unusable, and deletes the corresponding address from the management table. In this case, the address deletion process 222 does not occur.
- a sixth example of the change in the line state is a case where the address information is updated under the initiative of the home agent 117.
- the home agent 117 uses the current location estimated from the travel route and current time of the mobile network 104 that is known in advance, or the current location based on the location information of the mobile network 104 using a system such as GPS. Guess the possible addresses and update the management table. In this case, the address registration processing operation 221 and the address deletion processing operation 222 do not occur.
- a seventh example of the change in the line state is a case where the movement of the mobile network 104 causes the address registration processing operation 221 and the address deletion processing operation 222 to be performed.
- the Mopalile Network 105 periodically checks the line status of each communication interface.
- the line management & address acquisition unit 324 detects the line disconnection by the notification of the line state change by the communication interface.
- the line management & address acquisition unit 324 detects the line connection by periodically checking the ace line state or by notifying the line state change by the communication interface. At this time, the line information is obtained at the same time. For example, the type of communication interface, the bandwidth of the line, and combinations thereof. Then, together with the address registration processing operation 2 2 1, the address deletion processing operation 2 2 2 stands.
- the address registration processing operation 2 2 1 operates as follows.
- the line management & address acquisition unit 3 2 4 acquires the address of the communication interface 3 12 to 3 15 by DHCP protocol or IPv6 address automatic generation processing, etc. 25 Record the newly acquired address, interface number, and line information as the route information in the management table of 5, and change the status to "registering".
- the signaling bucket generation unit 326 sends a newly obtained addressing and line characteristic information to the home agent 1 17, a signaling packet for registration request (registration request packet 200 2). ) Is generated and passed to the transmission interface selector 329. '
- the transmission interface selection unit 329 refers to the management table in the storage unit 325 and requests a registration from the currently available interface (the communication interface in which the state of the line information in the management table shown in FIG. 5 is registered). Select an interface to transmit packet 202, select one of the corresponding communication interfaces 312 to 315 and one of the corresponding input / output terminals 302 to 305, and select the selected communication interface.
- the registration request bucket 202 is transmitted to the home agent 117 via the interface and the input / output terminal.
- the registration request packet 202 reaches the home agent 117 via the access line terminating station, the packet switching network, and the router.
- the packet classification unit 4 28 identifies that the received packet is the registration request packet 202, and passes the registration request bucket 202 to the packet analysis section 429.
- the packet analysis unit 429 records the new address and line information obtained by analyzing the packet in association with the home address of the mobile router 105 in the management table of the storage unit 426.
- the mobile station instructs the signaling packet generator 427 to generate a signaling packet for acknowledgment (acknowledgement packet 203).
- the signaling bucket generator 427 passes the acknowledgment bucket 203 to the priority selector & timing controller 421.
- the destination selection & timing control unit 4 2 1 refers to the storage unit 4 2 6, selects one of the addresses currently used by the mobile network 105 as the destination, and sets the communication interface 4 1 1.
- the acknowledgment packet 203 arrives at the mobile router 105 via the bucket switching network and the access line terminating station according to the destination.
- the bucket The analysis unit 3 2 3 analyzes the received packet and identifies it as an acknowledgment packet.
- the bucket analysis unit 323 extracts the successfully registered address from the acknowledgment packet 203, and changes the state of the corresponding address in the route information of the management table of the storage unit 325 from "registering" to “registered”. Change to "registered” and discard acknowledgment packet 203.
- the management table held by the mobile router 10 5 in FIG. As shown in FIG. 6, which is an example of a management table to be used, it is possible to share usable address information of the mobile router 105.
- the home agent provides a round-trip for each mobile address. It is also possible to add route information by measuring the uptime. If there is an address registration request from another interface before the address registration of a certain interface is completed, multiple address registration processing operations may be performed in parallel.
- the policy information may be included in the acknowledgment bucket from the home agent, and the policy information may be distributed throughout the mobile.
- the line management & address acquisition unit 3 2 4 notifies the storage unit 3 2 5 of the changed interface number and occurrence of the disconnection event, and outputs the route information of the management table. Update the status of the interface to "deleting".
- the line management & address acquisition unit 3 2 4 notifies the signaling packet generation unit 3 2 6, and the signaling packet generation unit 3 2 6 uses the previously used address of the changed interface.
- a delete request packet 211 addressed to the home agent 1 17 is generated and passed to the transmission interface selecting section 3 29.
- the transmission interface selection unit 329 refers to the management table of the storage unit 325, selects an interface for transmitting the delete request packet 211 from currently available communication interfaces, and selects the selected communication interface.
- the delete request packet 211 is sent to the home agent 117 via one of the input / output terminals 302 to 305 corresponding to any one of the interfaces 3112 to 315.
- the delete request bucket 211 arrives at the home agent 117 via the access line terminating station, the packet switching network, and the router.
- the delete request packet 211 When the delete request packet 211 reaches the home agent 117, it passes through the input / output terminal 401 and the communication interface 411 in the home agent 117 and reaches the packet classifier 428.
- the received bucket is the deletion request packet 2 1 1
- the delete request bucket 211 is passed to the packet analyzer 429.
- the packet analysis unit 429 analyzes the packet, extracts the address that has become unusable in the mobile unit 105, and extracts the address from the management table of the storage unit 426, which corresponds to the mobile unit.
- 05 Deletes the path information of the corresponding address recorded in association with the home address of 5.
- the signaling packet generation unit 427 In order to respond to the mobile router 105 that the deletion has been completed normally, the signaling packet generation unit 427 generates an acknowledgment signaling packet (acknowledgement packet 2 1 2). Command.
- the signaling packet generation unit 4 27 passes the acknowledgment bucket 2 12 to the destination selection & timing control unit 4 2 1.
- the destination selection & timing control unit 4 2 1 refers to the storage unit 4 2 6, selects one of the addresses currently used by Mopileru 1 05 as the destination, and sets the communication interface 4 1 1
- An acknowledgment packet 2 1 2 is transmitted to Mopaille 1 105 via the input / output terminal 4 0 1.
- the acknowledgment bucket 2 12 arrives at the mobile terminal 105 via the packet switching network and access line terminating station corresponding to the destination.
- the mopile router 1 5 5 Analyzes the received packet and identifies it as an acknowledgment bucket. Further, the packet analysis unit 3 2 3 extracts the successfully deleted address from the acknowledgment packet 2 12 and changes the state of the corresponding address in the route information of the management table in the storage unit 3 2 6 from “deleting” to “stopping”. , And discard the acknowledgment packet 2 1 2.
- Packets (Packet A204) destined to the responding node (XXXX in the address in Fig. 4) and the source to the Mopyle network node (AAA100 in the address in Fig. 4) are sent from the mobile network node and sent It is received via the input / output terminal 301 connected to the mopile network 104 side of the network 105 and the communication interface 311 (AAA100 in the address of Fig. 4).
- the communication interface 311 of the mobile router 105 passes the bucket to the power conversion unit 327, and the encapsulation unit 327 encapsulates the reception bucket. Specifically, it generates a packet in which the received packet A204 is used as a payload, and the destination of the header portion is set to the home agent 1117 (A.A.A.254 in the address in FIG. 4).
- the encapsulation unit 327 passes the generated packet to the queuing unit 328.
- the queuing unit 328 temporarily stores the passed packet in the transmission waiting state.
- the data is stored in queues for each QoS class. Further, the queue may be further divided for each flow.
- QoS Quality of Service
- BE BestEffoi't
- IMT-2000 IMT-2000
- wireless LAN wireless local area network
- the transmission interface selection unit 329 manages the communication interface based on the route information in the management table of the storage unit 325, and at least one communication interface is in an idle state (the state of the route information is registered). ) To determine whether packet transmission is possible (step A001). If all communication interfaces are If it is in the active state (the state of the route information is registering or stopping), the process returns to step AO 01 again. If there is at least one communication interface, the communication interface with the smallest management interface number among the idle communication interfaces is to be processed (step AO 02). .
- the type of the communication interface to be processed is identified, and it is determined whether or not it is a wireless LAN (step A03).
- a wireless LAN In the case of a wireless LAN, higher throughput can be expected compared to IMT-2000, so transmission of QoS class traffic is attempted. Therefore, it is determined whether the QoS class queue is empty (step A004).
- a QoS class queue may exist for each flow. If there is a queue for each flow, determine whether at least one queue is empty. If the queue of the QoS class is not empty, it is determined that a packet is taken out from the queue of the QoS class of the queuing unit 328 and transmitted (step A006).
- a queue for extracting the bucket may be selected using an arbitrary algorithm. If the queue of the QoS class is empty, it is determined whether the queue of the BE class is not empty (step A005).
- step A099 it is determined whether at least one queue is empty. If the queue of the BE class is not empty, it decides to take out the packet from the queue of the BE class of the queuing section 328 and transmit it (step A099). If there is a queue for each flow, any algorithm can be used to select the queue from which to retrieve the bucket. If the BE class queue is also empty, the process returns to step A001.
- step A003 If it is determined in step A003 that the type of the communication interface is IMT-2000, transmission of BE class traffic is attempted. Therefore, it is determined whether the BE class queue is empty (step A07). At this time, the BE class queue may exist for each flow. If there is a queue for each flow, determine whether at least one queue is empty. If the BE class queue is not empty, it decides to take out and transmit the BE class cu bucket of the queuing section 328 (step A009). For each flow If there is a user, you can select a queue to retrieve the bucket with any algorithm. If the queue of the BE class is empty, it is determined whether the queue of the QoS class is not empty (step AO08).
- step A 06 it is determined whether at least one queue is empty. If the queue of the QoS class is not empty, it decides to take out the bucket from the queue of the QoS class of the queuing unit 328 and transmit it (step A 06). If there is a queue for each flow, a queue for extracting packets by an arbitrary algorithm may be selected. If the QoS class queue is also empty, the process returns to step A001.
- the transmission interface selection unit 329 sets the source address of the header portion of the packet to the address of the selected communication interface (B.B.B.200 in the address of FIG. 4) (packet B 205).
- FIGS. 9 and 10 show examples of management tables including charging information held by the mobile router 105 and the home agent 117. FIG. However, here, it is assumed that all of the interfaces existing in the tables in FIGS. 9 and 10 are available.
- Figure 11 shows an example of an interface selection algorithm for mobile communication at the time of packet transmission.
- the transmission interface selection unit 329 sets the accounting information, which is the policy information already stored, to be applied at that time, in a state usable for transmission interface selection. For example, if the charging system changes depending on the time, the table shown in Fig. 5 is used. If the charging system changes depending on the location of the mobile router, Obtains the location information of the mobile router and keeps a table as shown in Fig. 10 accessible (step CO01). It should be noted that the table may depend on both time and location information.
- step CO 02 it is checked whether or not there is a flat-rate billing interface in the retained interface.
- a list is created by sorting in the order of the transmission rate in the interface of the flat-rate billing system (step C03).
- step CO04 When it is checked whether the list is empty (step CO04), since at least one exists, the first interface in the list is tentatively selected and deleted from the list (step C004). ). Assuming that the transmission queue is full and transmission is impossible, check whether transmission is possible on the temporarily selected interface (step C 006), and if transmission is possible, select the interface. (Step C 0 2 1).
- step C004 If transmission is not possible, the process returns to step C004, and the interface is selected again from the list. Step if all interfaces are no longer transmittable. Since the list becomes empty at the stage of 0 4, both the condition that the sum of the actual values of the transmission rates of all interfaces is equal to or greater than the threshold value and the condition that there is an interface made by pay-per-use Check if it is satisfied (step C 0 7).
- the threshold here is the sum of the transmission rates of the flat-rate charging interface + margin (however, the margin is 0 or more). If not, the packet is discarded (step C 0 2 2).
- step C022 interface selection may be performed again after a predetermined time without discarding the bucket.
- step C002 If there is no flat-rate billing interface at step C002, it is checked whether there is a pay-as-you-go billing interface (step C). 0 1 1).
- step CO 24 If the packet does not exist, the packet is discarded (step CO 24).
- step CO 12 create a pay-as-you-go interface list sorted in ascending bucket unit price (step CO 12). It is checked whether the list is empty (step C013), and since at least one exists, the interface at the head of the list is temporarily selected and deleted from the list (step CO14). It is checked whether transmission is possible with the provisionally selected interface (step CO15), and if transmission is possible, the interface is selected (step C023). If transmission is not possible, the process returns to step C 0 13 and the interface is selected again from the list. If all interfaces cannot be transmitted, the packet is discarded because the list becomes empty at step CO 13 (step C 0 24).
- FIG. 19 is an example of a management table including billing information held by Mobile One Night 105.
- FIG. 19 addresses and route information of four communication interfaces are registered.
- the communication interface with communication interface number 1 is a wireless LAN
- the bandwidth is llMbps
- the billing system is pay-as-you-go.
- the communication interface of the remaining communication interface numbers 2, 3, and 4 is IMT-2000, with a bandwidth of 384kbps and a billing system of pay-as-you-go.
- the communication interface is selected as follows.
- the required bandwidth is 11.5 Mbps.
- the required band may be determined and stored in advance, or may be configured so as to be obtained from outside as necessary.
- charging information is used as policy information, and communication is performed so that the user's communication fee is minimized when both fixed-rate charging and usage-based charging are mixed.
- An example of selecting an interface (selecting a line) will be described with reference to FIG.
- FIG. 20 is an example of a management table including the billing information held by the mobile router 105.
- address and route information of four communication interfaces are registered.
- the communication interface with communication interface number 1 is a wireless LAN, with a bandwidth of 11 Mbps and a flat-rate billing system.
- the communication interface of the remaining communication interface numbers 2, 3, and 4 is IMT-2000, the bandwidth is 384kbps, and the charging system is pay-as-you-go.
- the communication interface is selected as follows.
- the wireless LAN with communication interface number 1 is a flat-rate charge, so the wireless LAN with communication interface number 1 is selected.
- the difference between the total bandwidth of the selected communication interface and the required bandwidth is determined. Since the bandwidth of the selected communication interface is 11 Mbps, the difference from the required bandwidth is 0.5 Mbps.
- Another communication interface with a fixed charge is searched for and the already selected communication interface is searched.
- the total bandwidth is determined by adding the bandwidth of the interface. If there is no other communication interface for flat-rate charging, search for a communication interface for pay-as-you-go. In this case, since there is no other communication interface for flat-rate charging, the communication interface for pay-as-you-go charging is searched, and IMT-2000 of communication interface number 2 is selected. Since the total bandwidth of the selected communication interface is 11.384 Mbps, the difference from the required bandwidth is 116 kbps. Therefore, only 116kbps of the IMT-2000 band of communication interface 3 is used.
- the selected communication interface (line) is the wireless LAN with communication interface number 1 and the IMT-2000 with communication interface numbers 2 and 3. Use only 116kbps.
- the transmission interface selection unit 329 assigns packets B 205 to the home agent 111 so that the packets can be sorted in order, for example, 1, 2, 3 Assign serial numbers like... However, it is also possible to identify the combination of the destination and source response nodes and the mobile network node, and assign an independent serial number to each combination. However, the numbering method is arbitrary.
- the packet B 205 is transmitted to the home agent 117 via the input / output terminal corresponding to the selected communication interface. Packet B 205 arrives at home agent 117 via the access line terminating station and the packet switching network.
- the packet B205 When the packet B205 reaches the home agent 117, the packet B205 passes through the input / output terminal 401 and the communication interface 411 in the home agent 117, and reaches the bucket classification unit 428.
- the packet classification unit 428 identifies that the received packet is a data communication packet from the mobile network node to the response node, and passes the packet B 205 to the buffer & sequence control unit 425.
- the operation of the buffer & order control unit 425 will be described using positive numbers p and Q. If the packet is not buffered in the buffer & sequence control unit 4 25, the mobile router 105 looks at the serial number added to the packet, and the serial number is the latest base serial number among the packets received so far. If it is the serial number (p + 1) next to (P), it is immediately passed to the decapsulation unit 424.
- the received packet is a serial number (P + q) due to loss or delay of the packet after the serial number (p)
- the received packet is buffered up to, for example, 1 second.
- the decapsulation unit arranges the serial number from the base serial number to the consecutively connected packets including the buffered packet and the passed packet, and then decapsulates the packet. Pass it to 4 2 4 and change the base point serial number to the largest value of the bucket serial number passed to the decapsulation unit 4 2 4. If they are not connected, they are not passed to the decapsulation unit 4 24 at that time. This process is repeated each time a bucket is passed.
- the above operation is an example of the operation of the buffer & order control unit 425, and the time for buffering the packet may be arbitrary.
- the algorithm of the sequence control itself may be another method.
- the decapsulation section 424 removes the header of the passed bucket and extracts the packet A206 of the payload portion.
- the extracted packet A206 is transferred to the responding node via the communication interface 411 and the input / output terminal 401. Packet A 206 reaches the responding node through the packet switching network. Next, the flow of a packet from the responding node to the mobile network node will be described.
- the packet C207 transmitted from the responding node to the mobile network node is route-controlled by the router and transferred to the home agent 117.
- the packet C207 When the packet C207 reaches the home agent 117, the packet C207 passes through the input / output terminal 401 and the communication interface 411 in the home agent 117 and reaches the packet classification unit 428.
- the bucket classifying section 428 identifies that the received packet is a data communication packet from the responding node to the mobile router 105, and passes the packet C207 to the encapsulating section 423. .
- the encapsulation unit 4 2 3 encapsulates the received packet. Specifically, it generates a packet in which the received packet C207 is used as the payload and the destination of the header part is set to mobile router 105 (B.B.B.200 in the address in FIG. 4). The cubing unit 422 passes the generated packet to the queuing unit 422.
- the queuing unit 422 temporarily stores the transmitted packet waiting for transmission.
- data is stored in queues that are separated for each QoS class.
- the queue may be further divided for each flow.
- the destination selection & timing control section 421 manages the transmission timing of the bucket, and determines whether or not packet transmission is possible to at least one destination address (step B001). Specifically, referring to the storage unit 426, it is determined whether or not the next packet transmittable time held for each destination address is earlier than the current time. This is to prevent the home agent from sending an extremely large number of packets on the route and not losing it on the routers on the way.
- step B001 If it is determined in step B001 that all the destination addresses cannot be transmitted, the process returns to step B001 again.
- step B002 If there is at least one transmittable destination address, of the transmittable destination addresses, the destination address with the smallest communication interface number for management is processed (step B002). . Next, refer to the information in the storage unit 4 2 6 Then, the type of the communication interface to be processed is identified, and it is determined whether or not it is a wireless LAN (step B003).
- step B004 it is determined whether or not the QoS class queue is empty. At this time, a QoS class queue may exist for each flow. If there is a queue for each flow, determine whether at least one queue is empty.
- the queue of the QoS class decides to take out the packet from the queue of the QoS class of the queuing unit 422 and transmit it (step B 006). If there is a queue for each flow, a queue for extracting packets may be selected using an arbitrary algorithm.
- step B 005) If the queue of the QoS class is empty, it is determined whether the queue of the BE class is empty.
- the BE class queue decides to take out the packet from the BE class queue of the queuing unit 4 22 and transmit it (step B 010). If there is a queue for each flow, a queue for extracting the bucket may be selected using an arbitrary algorithm. If the BE class queue is also empty, the process returns to step B001.
- step B003 If it is determined in step B003 that the type of the communication interface is IMT-2000, transmission of BE class traffic is attempted. Therefore, it is determined whether or not the BE class queue is empty (step B08). At this time, a BE class queue may exist for each flow. If there is a queue for each flow, determine whether at least one queue is empty.
- the BE class queue determines that the BE class queue packet of the queuing section 4 22 is to be extracted and transmitted (step B 0 10). If there is a queue for each flow, a queue for taking out the packet by an arbitrary algorithm may be selected. If the queue of the BE class is empty, it is determined whether the queue of the QoS class is not empty (step B009). Similarly, if it exists for each flow, it is determined whether at least one queue is empty. If the queue of the QoS class is not empty, it decides to take out the packet from the queue of the QoS class of the queuing unit 42 and transmit it (step B 006). If there is a queue for each flow, a queue for extracting packets by an arbitrary algorithm may be selected. If the QoS class queue is also empty, return to step BOO1.
- the QoS class that extracts the bucket from other information such as the bandwidth and the bit error rate of the wireless section instead of the type of communication interface may be selected.
- the communication interface may be selected using another index such as reliability.
- the next packet transmission timing is calculated (step B07). For example, if a destination address with a bandwidth of 384 kbps (address of a communication interface of mobile router 105) is selected, and a packet with a data size of 1500 bytes is transmitted, the next bucket will be transmitted after 31.25 ms. In this way, the next bucket transmittable time is updated for the corresponding destination address of the management table stored in the storage unit 426.
- the transmission timing may be updated by using a leaky bucket operation to allow a certain degree of burstiness.
- the destination selection & timing control section 4 21 differs from the transmission interface selection section 3 2 9 in that it determines a destination address instead of a transmission interface, and differs in criteria for determining the possibility of transmission to a destination address. Transmission possibility is determined not by whether the transmission queue overflows but by calculating the packet transmission timing.
- next packet is sent after 31.25 ms, so that To update the next packet transmittable time.
- the next time you select the same destination address In order to allow data transmission, even if the next bucket transmittable time is not strictly determined, transmission is determined to be possible, and the operation of updating the next packet transmittable time is repeated again.
- the transmission possibility is checked, if the next packet transmission time deviates from the current time by a threshold or more, it is considered that transmission is impossible.
- the destination selection & timing control section 421 sets the destination in the header of the packet (packet D 208).
- FIG. 21 is an example of a management table including the billing information held by the home agent 1 17.
- four addresses C.C.C.50, B.B.B.200, B.B.B.201, B.B.B.202, and route information are registered.
- address C.C.501 has a communication interface type of wireless LAN, a bandwidth of llMbps, and a billing system of pay-per-use.
- the remaining three addresses, B.B.B.200, B.B.B.201, and B.B.B.202, have a communication interface type of IMT-2000, a bandwidth of 384kbps, and a billing system of pay-as-you-go.
- the communication interface is selected as follows.
- the required bandwidth is 11.5 Mbps. Therefore, the bandwidths of the addresses at the top of the management table are sequentially added so that the sum is equal to or less than the required bandwidth and closest.
- the address (line) to be selected is CCC50, BBB200, BBB201, BBB202, of which address BBB202 uses only 116kbps of the entire bandwidth.
- the billing information is used as policy information, and when both fixed-rate billing and pay-as-you-go billing are mixed, the communication interface is designed to minimize the user's communication fee.
- An example of performing evening face selection (line selection) will be described with reference to FIG.
- FIG. 22 is an example of a management table including charging information held by the home agent 1 17.
- address C.50 has a communication interface type of wireless LAN, a bandwidth of 11 Mbps, and a billing system of flat-rate billing.
- the type of communication interface for B.B.B.201 and B.B.B.202 is IMT-2000, the bandwidth is 384kbps, and the billing system is pay-as-you-go.
- the communication interface is selected as follows. First, check the bandwidth required for communication. Here, the required bandwidth is 11.5 Mbps. Therefore, first, a fixed-rate billing address is selected. Here, the address
- the address (line) to be selected is the wireless LAN of the address CCC50 and the IMT-2000 of the address BBB200 and BBB201.
- the IMT-2000 of the address BBB201 uses only 116 kbps of the entire band.
- the bucket D 208 is arranged so that the order can be sorted at the mobile station 105, for example, 1, 2, 3,. Please give a serial number to.
- the numbering method is arbitrary.
- the combination of the destination and source mopile network nodes and response nodes may be identified, and an independent serial number may be assigned to each combination.
- the bucket D208 reaches the mobile router 105 via the packet switching network and the access line terminating station according to the destination.
- the mobile router 105 receives the bucket D 208 via one of the input / output terminals 302 to 305 and the corresponding communication interface 310 to 315, and receives the bucket.
- the analysis section 3 2 3 analyzes the packet.
- the packet analyzer 322 identifies that the received packet is a packet addressed to the mobile network node, and passes it to the buffer & order controller 322.
- the buffer & order control unit 3 222 performs the same order control operation as, for example, the buffer & order control unit 4 25 of the home agent 1 17 using the serial number added by the home agent 1 17.
- the sequence control may be performed by a method different from that of the buffer & sequence control unit 4 25 of the home agent 1 17.
- the decapsulation unit 321 removes the header of the passed bucket and extracts the packet B 209 of the payload part.
- the extracted packet B209 is transferred to the response node via the communication interface 311 and the input / output terminal 301.
- Packet B 209 reaches the destination mobile network node in mopyle network 104.
- the encapsulation technology is an example of means for tunneling between the mobile router and the home agent, and other means include MIPv6 header ⁇ MPLS (Multi Protocol Label Switching). It may be realized by using it.
- mobile roux and home agent The encapsulation unit and decapsulation unit will be replaced with functional units corresponding to the technology used.
- the mobile terminal 105 and the home agent correspond one-to-one, but the present invention is not limited to this.
- the home agent has a management table in which the address and the route information are stored for each mobile router.
- the network of the service that can be used by the user of the moving network can be combined. It can provide the best communication environment in the area where is located.
- one logical line combining the lines of services X1 and X2 by carrier X can be used.
- service X1 by carrier X and carrier Y One logical line combining the lines of service y1 can be used.
- one logical line combining the lines of service y1 and service y2 of carrier Y can be used.
- It may be replaced by CPU or MPU.
- the CPU and the MPU are stored in a storage medium such as a ROM or a RAM, and the CPU and the MPU are connected to the above-described packet analysis unit 323, the sofa and the ordering system.
- Control section 3 2 Decapsulation section 3 2 1, Line management & address acquisition section 3 2 4, Signaling packet generation section 3 26, Encapsulation section 3.2 7, Queuing section 3 2 8, Transmission interface selection It may be configured to operate as the unit 329 and the traffic measuring unit 330.
- a home agent bucket classifier 428, a packet analyzer 429, a signaling bucket generator 427, an encapsulator 423, a destination selection & timing controller All or a part of the 421, the buffer & order control unit 425, and the decapsulation unit 404 may be replaced by a CPU or MPU. Then, by a program stored in a storage medium such as ROM or RAM,? 11 to 11, the above-described bucket classification unit 4 28, packet analysis unit 4 29, signaling packet generation unit 4 27, force packetization unit 4 23, destination selection & timing It may be configured to operate as a control unit 421, a buffer & order control unit 425, and a decapsulation unit 404.
- the transmission delay after the update is estimated by referring to the transmission history and the updated route information after the time at which the update is effective.
- the result may be configured to be reflected in packet scheduling for selecting a route and transmitting a baguette. This prevents a decrease in multiplexing efficiency in a system in which the state of each path fluctuates dynamically.
- FIG. 12 shows an example of the overall configuration of the system, which is a simplified version of the configuration in Fig. 1.
- one logical line is provided by appropriately combining lines of a plurality of communication means of the same type and different types of services proposed by the present invention on the path from the data generation node 10A to the destination node 11A.
- the transmitting node 1100 and the receiving node 1101 correspond to the mobile router 105 and the home agent 117.
- each of which is a wireless communication path between the wireless transmitting means 1200-1 ⁇ : 1200-3 and the wireless receiving means 1201-1 ⁇ 201-3.
- the figure shows the case of three routes
- the number of routes can take any value of 2 or more.
- all routes between the transmitting and receiving nodes may be wireless, but generally include a wired network 1102.
- each wireless link generally belongs to a different wireless network 1300.
- the routes 1202-1 and 1202-2 are cellular networks
- the wireless networks 1300-1 and 1300-2 are wireless LANs.
- the transmitting node 1100 distributes the traffic received from the data generating node 10A to each path based on the state information, and the receiving node 1101 re-transmits the traffic from the transmitting node 1100 via each path. Combine and send to destination node 11A.
- FIG. 13 shows the internal configuration of transmitting node 1100.
- the traffic transmitted from the data generation node 10A to the destination node 11A is input from the communication interface 1310-1, passes through the queuing unit and the scheduling unit, and is the transmission interface 1310-2 or 1310-3 of the multiplexed line. Sent from Note that multiple paths may share the physical link closest to the transmitting node, so the paths that make up the link do not necessarily correspond one-to-one with the communication interface.
- the scheduling unit 1312 takes out the input data from the queuing unit and sends it out to a specific path. The selection of the path used for transferring the extracted data is performed with reference to the path state managed by the path state monitoring unit 1314.
- the path state monitoring unit 1314 intermittently receives the state information of each path and the information identifying the transmission packet for which the update is valid from the receiving node 1101 via the communication interface 1310-2 or 1310-3, and receives them.
- the status information stored in the memory unit 1315 is updated based on the.
- the path status information generally indicates information that is an index of communication performance.
- This embodiment uses the speed of the route and the bucket delay. Various methods have been proposed for the receiving node to measure the speed and delay. The methods assumed in this embodiment are described below.
- the transmitting node shall insert the identifier and transmission time into each of the buckets to the receiving node and transfer them.
- the receiving node measures the packet delay by comparing the transmission time inserted by the transmitting node with the time it received.
- the transmitting node periodically transmits a packet for measurement, and the receiving node can estimate the speed from the variation in the arrival time.
- the receiving node periodically sends these measured values to the transmitting node as status information. Also, the latest packet identifier received up to that point is transmitted at the same time as the identification information of the packet for which the status information to be transmitted is valid.
- the scheduling unit 1312 refers to the current path information for each transmission path of the packet to be transferred next and the transmission history after transmission of the bucket in which the information is valid, and predicts the arrival delay at the receiving node.
- the transmission history is stored in the memory unit 1315.
- the scheduling unit 1312 selects the route with the smallest predicted arrival delay as the transmission route of the bucket to be transferred next, and after transferring the packet to the selected route, transmits the transfer time on the memory unit 1315 Add to history.
- FIG. 14 shows an example of an arrival delay estimating method for each route operated by the scheduling unit 1312.
- 1400-1, 1400-2, and 1400-3 are data packets.
- the transmission history and prediction at the transmitting node and the reception history and prediction at the receiving node are shown on the time axis. Have been.
- the transmission of the data packet 1400-1 is started at the transmitting node at time T1, and the transmission is completed at time T2.
- the reception of the same packet 1400-1 starts at time T3 at the receiving node, and the reception is completed at time T4.
- the difference II between T1 and T3 is the transmission delay
- the difference between T4 and T2 is the total delay obtained by adding the dispersion of the packet caused by the speed difference between the transmission interface and the transfer path to the transmission delay.
- packet 1400-3 is to be transmitted at the current time of the TP on the time axis.
- the packet for which the status information obtained at the time of the TP for this route is valid is 1400-1.
- the reception start time and the completion time at the receiving node of the packet 1400-2 transmitted after the packet 1400-1 are estimated from the speed and the transmission delay included in the current state information.
- the estimated reception start time is T5 in the figure and the reception completion time is ⁇ 7.
- the packet 1400-3 that started transmitting to the TP should start receiving at time T6, but at that time the receiving node is still Since the reception of packet 1400-2 is not completed, the estimated reception start time of bucket 1400-3 is T7, which is estimated that reception of bucket 1400-2 is completed, and the estimated reception of bucket 1400-3
- the completion time is T8, which includes the packet variance estimated from the path speed included in the status information.
- the completion time of the reception of the bucket 1400-3 is estimated for each route, and the packet 1400-3 is transmitted to the route with the earliest time.
- the state information used for estimating the arrival time of the receiving side at the time of TP in FIG. 14 is updated, for example, between T2 and T5 by receiving the report result notification.
- the arrival time estimation when transmitting packet 1400-2 is based on the older state information in the TP.
- the old state information is information A
- the new information updated between T2 and T5 is information B. If the delays and path speeds included in information A and information B differ due to link state fluctuations, the arrival time prediction based on A would have been different from the arrival time prediction based on information B shown in Fig. 14. is there. Therefore, the predictions of the arrival times of buckets 1400-1 and 1400-2 shown in Figure 14 reflect the modification of the result obtained from information B.
- Figure 15 shows the scheduler's route selection procedure including the arrival time estimation as described above.
- the predicted arrival time of previously transmitted packets is corrected and reflected in subsequent packet transmission decisions, so past transmission results can be compensated. become.
- the effect of this compensation becomes remarkable when the round trip delay of each route is large and cannot be ignored for the period of the state change of the route. The reason is described below. '
- the state of the route may have already changed by the time the transmitting node acquires the state information, so the information is not reliable. Therefore, it is impossible to optimally select a route and set a timing at the time of transmitting a bucket, and a packet is generally transmitted on a non-optimal route and timing. Modifying the time of arrival estimate when updating state information has the impact of already-optimized transmissions Is equivalent to estimating after the time corresponding to the state information update interval has elapsed. For example, if the transmission rate was too high in the past, the update of the status information will extend the estimated arrival time of the transmitted packet and raise the transmission cost of the route.
- the correction of the past transmission bucket arrival time prediction by updating the state information has the effect of optimizing the route selection.However, if the correction of the arrival time prediction is fed back to the transmission timing control as well as the route selection, Congestion control of each route is also optimized over the long term.
- the reception completion time of the transmission bucket is estimated for each route and the route with the highest evaluation value is selected in the same manner as in the above-described embodiment, but the allowable estimation delay is newly defined for each route.
- the permissible estimated delay is denoted by TM.
- TM the permissible estimated delay
- the packet in order to send a bucket at the TP, the packet must be presumed to have been received by TM + TP.
- T8 which is later than TM + TP. Therefore, the transmitting node cannot transmit packet 1400-3 from this route until the estimated reception completion time reaches TM + TP.
- the transmitting node holds the packet 1400-3 until the estimated reception completion time of any of the routes is equal to or less than TM + TP, and transmits this packet from the route that can release the hold first.
- FIG. 17 shows the operation of the scheduling unit in the above embodiment.
- the value of the allowable delay TP may be set independently for each route. For example, when the delay of each route or the buffer amount of the server to pass through greatly differs, especially under a heavy load, it is considered that the bandwidth of each route can be effectively used by setting the setting value of TM differently for each route.
- the feature of the present invention is that, when the transmitting node updates the path state information, it simultaneously obtains a transmission bucket or time at which the update is valid, and obtains from the valid packet or the transmission history after the valid time. Estimating the impact on the transmission cost and transmitting the next packet to the path with the least cost.
- the operation policy of the target upper limit of the communication charge per unit time or the target communication rate desired by the user as policy information is stored in the management table, and the communication interface is set within that range. This is an example of selection. This will be described below.
- policy information 2300 In the management table of the storage unit 325, policy information 2300, statistical information 2400, and communication interface quality information 2500 are stored.
- the policy information 2300 is composed of overall operation policy information 2310 and operation policy information 2320 for each communication interface.
- the overall operation policy information 2310 includes the target minimum communication rate of the mobile network 104 and the target upper limit of the communication fee.
- the line-by-line operation policy information 2320 contains, for each type of communication interface, the use priority of the type of communication interface, the expected communication rate (average downlink rate, average uplink rate), charging system, charging rate, and the maximum number of lines. Be composed.
- the statistical information 2400 includes, for each communication interface, the status of the communication interface (in use (On) or not used (Off)), downlink communication rate, and uplink communication rate. It consists of the number of received packets per unit time, the number of transmitted packets per unit time, connection time, and line utilization.
- information is recorded not for each communication interface type but for each communication interface.
- PDC line type
- information is recorded separately for the two communication interfaces of PDC # 1 and PDC # 2.
- the communication interface quality information 2500 includes, for example, as shown in FIG. 25, the status of the communication interface, the determination of the area within / outside the area of the communication interface, and the reception quality.
- the communication interface quality information 2500 shown in FIG. 25 is also recorded for each communication interface, not for each communication interface type, similarly to the statistical information 400 shown in FIG.
- the PDC is two communication interfaces, so in the communication interface quality information 2500 shown in FIG. 25, PDC # 1 and PDC # 2 Information is recorded in two communication interfaces (lines). ⁇ This information is collected by the line management & address acquisition unit 3 24 and the traffic measurement unit 3 330 and registered in the management table of the storage unit 3 25.
- FIG. 26 is a flowchart of the operation of the transmission interface selector 329.
- the status of the communication interface quality information 2500 is set to Off in descending order of use priority of the communication interface type in the policy information. That is, search for an unused communication interface (step 2a). If the corresponding communication interface does not exist, the communication interface selection processing ends (step 3a). If the corresponding communication interface exists, it checks whether the reception quality of the communication interface quality information 2500 of the communication interface is good (step 4a).
- the process returns to the search for the communication interface type (step 5a). If the reception quality is good, use the current type of communication Check whether the number of interfaces is less than the preset maximum number of communication interfaces (step 6a). If the number is equal to or greater than the maximum number of communication interfaces, the process returns to the search for the above communication interface type (step 7a). If the number is less than the maximum number of communication interfaces, the communication interface is notified to establish a PPP link (step 8a).
- the sum of the average rates of the communication interfaces added in the communication interface selection processing is compared with the difference between the target value and the measured value of the communication rate (step 9a). If the sum of the average rates is smaller than the difference, the process returns to the search for the communication interface type (step 10a). If the sum of the average rates is equal to or greater than the above difference, the communication interface selection processing ends.
- the communication interface quality information is used in the ascending order of the priority of using the communication interface type in the policy information.
- a communication interface whose status of 500 is On is searched (step 2b), and if there is no corresponding communication interface, the communication interface selection processing ends (step 3b).
- the charging system is determined (step 4b). If the charging system is packet-based charging (step 5b), the reduction per unit time due to disconnection of the communication interface in the current communication interface selection processing is calculated from the number of transmitted / received packets and the charging rate (step 6b). .
- the reduced amount is compared with the difference between the actual value of the communication fee and the target upper limit value. If the reduced amount is equal to or less than the difference (step 7b), the PPP link is requested to be disconnected, and the communication interface type is set as described above. Return to search for (step 8b). If the aforementioned reduction is greater than the difference (step 9b), the communication interface usage rate is calculated so that the reduction matches the difference between the actual value and the upper limit (step 10b), and the communication interface is used. Type and Determine the communication interface usage rate.
- step 12b if the charging system of the communication interface type of the communication interface whose status is On is time-based charging (step 12b), a request is made to disconnect the PPP link of the communication interface (step 13b), and this communication interface disconnection is performed.
- the amount of reduction per unit time due to the processing is calculated from the connection time and the charging rate (Step 14b). This reduction is compared with the difference between the actual value of the communication fee and the target upper limit. If the reduction is less than or equal to the difference, the process returns to the search for the communication interface type described above (Step 15b), and the reduction is calculated. If is larger than the difference, the communication interface selection process ends (step 16b).
- the method of selecting communication interfaces of the same communication interface type may be selected in the order of pre-assigned identifiers, but may be selected at random.
- a communication interface with poor reception quality may be preferentially selected and disconnected. good.
- the overall operation policy information 2310, the operation policy information for each communication interface 2320, the statistical information 2400, and the communication interface quality information 2500 are shown in FIGS. 23, 24, and 25.
- the explanation is given using the ones shown in the above. The specific operation flow will be described with reference to the operation flowchart in FIG.
- FIG. 27 is a graph in which the actual value 2600 and the minimum target value 2610 of the communication rate per unit time are plotted when the mobile network 104 moves from the point A to the point B.
- the transmission interface selection unit 329 starts the communication interface selection processing because the actual value 2600 of the communication rate has fallen below the target minimum value 2610.
- the transmission interface selection The selecting unit 329 searches for the communication interface that is not used, that is, the status of the communication interface quality information 2500 is O, that is, the communication interface that is not used, in descending order of the use priority of the communication interface type of the communication interface operation policy information 2320. (Step 2a).
- the use priority of cdma20001x is “3” and there is one unused communication interface, the communication interface of lx # 2 of cdma2000 lx is selected.
- step 4a it checks whether the reception quality of the selected cdma2000 lx lx # 2 line is good.
- the line is "good” in quality information 2500.
- step 6a it is checked whether the number of used lines of the type is less than a preset maximum number of communication interfaces.
- the maximum number of communication interfaces of cdma2000 l is 2 communication interfaces from the operation policy information 2320 for each communication interface, cdma2000 l
- the transmission interface selection unit 329 is notified to establish a PPP link to lx # 2 of cdma2000 lx (step 8a).
- the sum of the average rates of the communication interfaces added in this communication interface selection process is compared with the difference between the target minimum value and the measured value of the communication rate (step 9a).
- What was added in this communication interface selection process is one communication interface of lx # 2 of cdma2000 lx, and the average downlink rate is 60 kbps.
- the difference between the target minimum value of the communication rate and the measured value is 30 kbps. Therefore, since the sum of the lower average rates is equal to or greater than the above difference, the communication interface selection processing ends.
- the target minimum value of the downstream communication rate was uniform from point A to point B, whereas in Example 2 the target minimum value of the communication rate was weighted and distributed according to the occupancy rate.
- An example will be described. In the following description of the second embodiment, the description will be made using the overall operation policy information 2310 shown in FIG. 28, the statistical information 2400 and the communication interface quality information 2500 shown in FIGS. 23 and 24. . Also, a specific operation flow will be described with reference to an operation flow chart of FIG.
- FIG. 29 is a graph in which the actual value 2650 of the communication rate per unit time and the target minimum value 2660 are plotted when the mobile network 104 moves from the point A to the point B.
- Figure 28 shows the policy information 2301 in Example 2, considering that the occupancy rate between point A and point C is 80%, and the occupancy rate between point C and point B is 100%.
- the average rate target minimum value 2660 is weighted and distributed.
- the occupancy rate is obtained in advance from the reservation status of the train equipped with the mobile network 104, recorded in the overall operation policy information 2310, and the occupancy rate is changed.
- the switching may be performed at a certain timing (in the present embodiment, point C).
- the communication rate corresponding to the occupancy rate is determined in advance, and described in the overall operation policy information 2310, the occupancy rate is updated in real time, and the operation is performed at the communication rate corresponding to the occupancy rate. Is also good. Next, a specific operation will be described.
- the transmission interface selection unit 329 starts the communication interface selection processing because the actual value 2650 has fallen below the target minimum value 2660.
- the transmission interface selection unit 329 searches for a communication interface that has the status of the communication interface quality information 2500 in the descending order of the use priority of the communication interface type in the operation policy information 2320 for each communication interface, that is, an unused communication interface. (Step 2a).
- the use priority of cdma20001x is "3" and there is one unused communication interface, the communication interface of lx # 2 of cdma2000 lx is selected.
- step 4a it is checked whether the reception quality of the communication interface of lx # 2 of the selected cdma2000 l is good (step 4a).
- the communication interface is "good" in the communication interface quality information 2500. If the reception quality is good, check whether the number of used communication interfaces of the type is less than the preset maximum number of communication interfaces (step 6a).
- the maximum number of communication interfaces of cdma2000 1x is “2 communication interfaces” from the operating policy information 320 for each communication interface, the communication interface of lx # 2 of C dma2000 lx is selected. However, it is less than the maximum number of communication interfaces.
- Step 9a What was added in this communication interface selection process is one communication interface of lx # 2 of cdma2000 lx, and its downlink average rate is 60kbps. On the other hand, the difference between the target minimum communication rate and the measured value is 80 kbps. Therefore, since the sum of the lower average rates is smaller than the above difference, the process returns to the search for the communication interface type (step 10a).
- the transmission interface selection unit 329 searches for a communication interface in which the status of the communication interface quality information 2500 is Off, that is, an unused communication interface, in descending order of the use priority of the communication interface type of the communication interface operation policy information 2320. (Step 2a;).
- the use priority of the PDC is "4" and there are two unused communication interfaces, the PDC # 1 communication interface of the PDC is selected.
- step 4a it checks whether the reception quality of the communication interface of PDC # 1 of the selected PDC is good (step 4a).
- the communication interface is "good” in the communication interface quality information 2500.
- step 6a it is checked whether the number of used communication interfaces of the type is less than a preset maximum number of communication interfaces.
- the maximum number of communication interfaces of the PDC is “2 communication interfaces” from the operation policy information 320 for each communication interface, even if the communication interface of PDC # 1 of the PDC is selected, the maximum communication interface It is less than the number of faces. Then, it notifies PDC # 1 of the PDC to establish a PPP link (step 8a).
- the sum of the average rates of the communication interfaces added in this communication interface selection process is compared with the difference between the target minimum value and the measured value of the communication rate (step 9a).
- the downlink average rate of PDC # 1 of PDC added in this communication interface selection process is 10 kbps
- the downlink average rate of lx # 2 of cdma20001x added previously is 60 kbps, so the sum of the average rates is 70 kbps.
- the process returns to the search for the communication interface type (step 10a).
- the transmission interface selection unit 329 searches for the communication interface quality information 2500 whose status is Off, that is, a communication interface that is not used, in descending order of the use priority of the communication interface type in the operation policy information 2320 for each communication interface. (Step 2a).
- the use priority of the PDC is "4" and there is one unused communication interface, the communication interface of PDC # 2 of the PDC is selected.
- step 4a it checks whether the reception quality of the communication interface of PDC # 2 of the selected PDC is good.
- the communication interface is "good” in the communication interface quality information 2500.
- the reception quality is good, it is checked whether the number of used communication interfaces of the type is less than a preset maximum number of communication interfaces (step 6a).
- the maximum number of communication interfaces of the PDC is “2 communication interfaces” from the operation policy information 2320 for each communication interface. is there.
- step 8a it notifies PDC # 2 of the PDC to establish a PPP link.
- the sum of the average rates of the communication interfaces added in this communication interface selection process is compared with the difference between the target minimum value of the communication rate and the measured value (step 9a).
- PDC # 2 of PDC added in this communication interface selection process The average downlink rate is 10 kbps, and the sum of the downlink average rates of lx # 2 of cdma20001x and PDC # 1 of PDC added so far is 70 kbps, so the sum of the average rates by this addition is 80 kbps.
- the difference between the target minimum value of the communication rate and the measured value is 80 kbps. Therefore, since the sum of the downlink average rates is equal to or greater than the above difference, the communication interface selection processing ends.
- the fluctuation of the downstream communication rate was the trigger for starting the communication interface selection process, whereas in the present embodiment, the fluctuation of the communication cost was caused by the fluctuation of the communication interface. This is used as a start trigger of the selection process.
- FIG. 30 is a graph in which the actual value 2700 of the communication cost per unit time and the target upper limit value 2710 in the case where the mobile network 104 moves from the point A to the point B are plotted.
- the communication interface selection unit 2210 starts the communication interface selection processing because the actual communication cost value 2700 exceeds the target upper limit value 2710.
- a search is made for a communication interface in which the status of the communication interface quality information 2500 is On in the ascending order of the use priority of the communication interface type of the policy information (step 2b).
- the use priority of cdma2000 lx is "3" and lx # l of cdma20001 is being used, the communication interface of lx # l of cdma2000 lx is selected.
- the charging system is determined (step 4b). Since the communication interface of lx # l of cdma20001x is packet-based charging (step 5b), this communication
- the reduction per unit time due to disconnection of the communication interface in the communication interface selection processing is calculated from the number of transmitted / received packets and the charging rate (step 6b).
- the reduction per unit time is 6660 yen per unit time (0.0015 ⁇ ⁇ ⁇ ° packet X (4200000 + 240000) packets).
- the aforementioned reduction is compared with the difference between the actual value of the communication fee and the target upper limit.
- the reduction is 6660 yen (0.0015 ⁇ ⁇ ° packet X (4200000 + 240000) packets), and the difference between the actual value of the communication fee and the target upper limit is 6000 yen. Is greater than the difference. Therefore, the communication interface usage rate is calculated so that the reduced amount matches the difference between the actual value and the upper limit (step 10b), and the communication interface type and the communication interface usage rate are determined.
- the communication interface usage rate of lx # l of cdma20001x is set to 100 ⁇ ((6000/6660) ⁇ 100) 1 ⁇ 210%.
- the target upper limit of the communication cost is made uniform from the point A to the point B.
- the target upper limit of the communication cost is weighted and distributed according to the occupancy rate. are doing.
- FIG. 31 is a graph in which the actual value 2750 and the target upper limit value 2760 of the communication cost per unit time are plotted when the mobile network 104 moves from the point A to the point B.
- the communication cost per unit time is weighted and distributed. I have.
- the occupancy rate is obtained in advance from the reservation status of the train equipped with the mobile network 104 power S, and the overall operation policy information is obtained. It may be recorded in 2310 and switched at the timing when the occupancy rate changes (point D in this embodiment).
- the communication rate corresponding to the occupancy rate is determined in advance and described in the overall operation policy information 2310, the occupancy rate is updated in real time, and the operation is performed at the communication rate corresponding to the occupancy rate. May be.
- a specific operation will be described.
- the communication interface selection unit 2210 starts the communication interface selection processing because the actual value 2750 has exceeded the target upper limit value 2760.
- the communication interfaces whose status of the communication interface quality information 2500 is On are searched in the ascending order of the use priority of the communication interface type of the policy information (step 2b).
- the use priority of cdma2000 lx is "3" and lx # l of cdma20001x is being used, the communication interface of lx # l of cdma2000 lx is selected.
- step 4b since there is a communication interface type of the communication interface whose status is On, the charging system is determined (step 4b).
- the amount of reduction per unit time due to disconnection of the communication interface in the current communication interface selection process is calculated. Calculated from the number of transmitted / received packets and the charging rate (step 6b) 0
- the reduction per unit time is 6660 yen (0.0015 ⁇ / packet X (4200000 + 240000) packets) per unit time.
- the above-mentioned decrease is compared with the difference between the actual value of the communication fee and the target upper limit.
- the difference between the actual value of the communication fee and the target upper limit is 20000 yen.
- the reduced amount of the statement is smaller than the difference. Therefore, it requests the PPP link to be disconnected, and returns to the search for the communication interface type described above (step 8b).
- the communication interfaces whose status of the communication interface quality information 500 is On are searched in the ascending order of the use priority of the communication interface type of the policy information (step 2b).
- lx # l of cdma2000 lx the use priority of UMTS is "2" and UMTS # 1 is in use, so UMTS # 1 Select the communication interface.
- the charging system is determined (step 4b). Since the communication interface of UMTS # 1 is packet-based charging (step 5b), the reduction per unit time due to the disconnection of the communication interface in the current communication interface selection processing is calculated based on the number of transmitted / received packets and the charging rate. (Step 6b). Here, the reduction per unit time is 14880 yen (0.002 ⁇ / packet X (6180000 + 1260000) buckets).
- the sum of the aforementioned reductions is compared with the difference between the actual value of the communication fee and the target upper limit.
- the decrease of lx # l of cdma2000 lx is 6660 yen (0.0015 ⁇ ⁇ , ° packet X (4200000 + 240000) packets)
- the decrease of UMTS # 1 is 14880 yen (0.002 ⁇ ⁇ ° Ket X (6180000 + 1260000) packets)
- the total amount of reduction per unit time is 21540 yen.
- the difference between the actual communication charge and the target upper limit is 20000 yen, so the above-mentioned decrease is larger than the difference. Therefore, the communication interface usage rate is calculated so that the reduced amount matches the difference between the actual value and the upper limit (step 10b;), and the communication interface type and the communication interface usage rate are determined.
- FIG. 34 is a graph in which a total of 2,800 of the actual communication cost values and a total of the target upper limit value of 2810 are plotted when the mobile network 104 moves from the point A to the point B.
- the transmission interface selection unit 329 starts the communication interface selection processing because the accumulated actual value 800 exceeds the accumulated target upper limit value 2810.
- the communication interfaces whose status of the communication interface quality information 2500 is On are searched in ascending order of the use priority of the communication interface type of the policy information (step 2b).
- the use priority of cdma2000 lx is "3" and lx # l of cdma20001x is being used, the communication interface of lx # l of cdma2000 lx is selected.
- step 4b since there is a communication interface type of the communication interface whose status is On, its charging system is determined (step 4b). Since the lx # l communication interface of the cdma20001x uses packet-based charging (step 5b), the reduction per unit time due to the communication interface disconnection in this communication interface selection processing is calculated from the number of transmitted / received packets and the charging rate. (Step 6b). Here, the reduction per unit time is 6660 yen (0.0015 ⁇ ⁇ , packet X (4200000 + 240000) packets) per unit time.
- the aforementioned reduction is compared with the difference between the actual value of the communication fee and the target upper limit.
- the decrease is 6660 yen (0.0015 ⁇ ⁇ ° Ket X (4200000 + 240000) packets), the actual value of the increase in the communication charge per unit time, and the increase in the communication charge per unit time. Because the difference from the target upper limit is 3,000 yen, the aforementioned decrease is greater than the difference. Therefore, the communication interface usage rate is calculated so that the reduced amount matches the difference between the actual value and the upper limit (Step 10b), and the communication interface type and the communication interface usage rate are determined.
- the communication interface utilization rate of lx # l of cdma2000 l is set to 100- (3000/6660 X 100) 54%.
- the cumulative target upper limit value is a constant increase rate from point A to point B, whereas in this embodiment, the communication cost per unit time increases according to the boarding rate. The form of changing the amount is applied.
- FIG. 36 is a graph plotting the cumulative total 2850 of the actual communication costs and the total 2860 of the target upper limit values in the case where the mobile network 104 moves from the point A to the point B.
- the occupancy rate between the point A and the point E is 100% and the occupancy rate between the point E and the point B is 50%, from the point A to the point E and from the point E to the point B, Different increases are applied up to the point.
- the occupancy rate is obtained in advance from the reservation status of the train equipped with the mobile network 104, recorded in the overall operation policy information 2310, and the occupancy rate is changed.
- the switching may be performed at a certain timing (in this embodiment, point E).
- the communication rate corresponding to the occupancy rate is determined in advance, and described in the overall operation policy information 2310, the occupancy rate is updated in real time, and the operation is performed at the communication rate corresponding to the occupancy rate. Is also good. Next, a specific operation will be described.
- the transmission interface selection unit 329 starts the communication interface selection processing because the total 2850 of the actual values exceeds the total 2860 of the target upper limit values.
- the line whose line quality information 2500 status is On is searched for in the ascending order of the use priority of the communication interface type in the policy information (step 2b).
- the use priority of cdma20001x is "3" and lx # l of cdma2000 lx is being used, the line of lx # l of cdma2000 l is selected.
- step 4b since there is a line type of the line whose status is On, its charging system is determined (step 4b). Since the communication interface of cdina20001x 1 # 1 is packet-based charging (step 5b), the reduction per unit time due to the communication interface disconnection in the current communication interface selection processing is the number of transmission / reception buckets. And the billing rate (step 6b). Here, the amount of reduction per unit time is 6660 yen (0.0015 ⁇ ⁇ , Ket X (4200000 + 240000) packets) per unit time.
- the difference between the aforementioned decrease, the actual value of the increase in the communication fee per unit time, and the target upper limit of the increase in the communication fee per unit time is compared.
- the reduction is 6660 yen (0.0015 ⁇ 15.
- Packet X (4200000 + 240000) packets) and the difference between the actual value of the communication fee and the target upper limit is 19,000 yen. Less than the difference. Therefore, a request is made to disconnect the PPP link, and the process returns to the search for the communication interface type described above (step 8b).
- a search is made for a communication interface in which the status of the communication interface quality information 500 is On in the ascending order of the use priority of the communication interface type of the policy information (step 2b).
- the use priority of UMTS is "2" and the UMTS # 1 is in use, so the communication interface of UMTS # 1 is selected.
- step 4b since there is a communication interface type of the communication interface whose status is On, its charging system is determined (step 4b). Since the communication interface of UMTS # 1 is packet-based charging (step 5b), the reduction per unit time due to the communication interface disconnection in the current communication interface selection processing is calculated from the number of transmitted / received packets and the charging rate. (Step 6b). Here, the reduction per unit time is 14880 yen (0.002 ⁇ ⁇ ⁇ ° cket X (6180000 + 1260000) packets).
- Step 10b) Determine the communication interface type and the usage rate of the communication interface.
- the communication interface usage rate of UMTS # 1 is set to 100- (12340/14880 ⁇ 100) 17%.
- the overall operation communication interface policy is weighted by the occupancy rate.
- the weight is not limited to this, and the weighting may be performed by the current position of the train or the like.
- the location information is associated with the target value of the communication rate and the target upper limit of the communication fee
- the current location of the train is obtained by a location information acquisition system such as GPS, and the location information is used for the correspondence. It may be configured to obtain the target value of the communication rate and the target upper limit of the communication fee.
- the process after obtaining the target value of the communication rate and the target upper limit of the communication fee is the same operation as that of the above-described embodiment.
- the present invention relates to a data communication system, a communication apparatus, and a communication method using a technology for securing a broadband access line by configuring a single logical line by combining lines of communication means of the same kind and different services in a mobile packet communication network.
- a technology for securing a broadband access line by configuring a single logical line by combining lines of communication means of the same kind and different services in a mobile packet communication network.
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Abstract
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Priority Applications (6)
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EP20040734393 EP1638266A4 (en) | 2003-05-22 | 2004-05-21 | DATA COMMUNICATION SYSTEM, COMMUNICATION DEVICE AND COMMUNICATION PROGRAM THEREFOR |
CA002524719A CA2524719A1 (en) | 2003-05-22 | 2004-05-21 | Data communication system, communication device, and communication program thereof |
AU2004240444A AU2004240444A1 (en) | 2003-05-22 | 2004-05-21 | Data communication system, communication device, and communication program thereof |
CN2004800140590A CN1795646B (zh) | 2003-05-22 | 2004-05-21 | 数据通信系统、通信装置及其通信程序 |
US10/526,725 US8565227B2 (en) | 2003-05-22 | 2004-05-21 | Mobile IP data communication system comprising a mobile router that detects a change in connection status |
NO20055468A NO20055468L (no) | 2003-05-22 | 2005-11-18 | Datakommunikasjonssystem, kommunikasjonsanordning og tilhorende kommunikasjonsprogram |
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JP2004-135103 | 2004-04-30 |
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- 2004-05-21 KR KR20057022353A patent/KR100767225B1/ko not_active IP Right Cessation
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KR20060009953A (ko) | 2006-02-01 |
JP2005210671A (ja) | 2005-08-04 |
NO20055468L (no) | 2006-02-22 |
CN1795646A (zh) | 2006-06-28 |
EP1638266A4 (en) | 2012-04-04 |
JP4000479B2 (ja) | 2007-10-31 |
KR100767225B1 (ko) | 2007-10-17 |
US8565227B2 (en) | 2013-10-22 |
NO20055468D0 (no) | 2005-11-18 |
AU2004240444A1 (en) | 2004-12-02 |
EP1638266A1 (en) | 2006-03-22 |
CN1795646B (zh) | 2010-06-09 |
CA2524719A1 (en) | 2004-12-02 |
US20060182128A1 (en) | 2006-08-17 |
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