JP2005039733A - Wide area mobile information communication method, and mobile information communication edge router device and wide area mobile information communication system device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a wide area mobile information communication method, and a mobile information communication edge router device and a wide area mobile information communication system device with which the control signal load of an IP network and the control load of an element in the network are lightened, seamless path control to a secure path is safely carried out, and flexible and optimum path control can be carried out according to information about characteristics of contents and a content distribution network. <P>SOLUTION: The mobile information communication edge router device having a content characteristic processing mechanism 98 for deciding necessity/unnecessity of path control of data communication on the basis of a mobile IP packet received via a mobile IP tunnel and session control management information indicating quality of a path in an IP network 1 set in advance and a session control mechanism 99 for carrying out session control regarding selection of the optimum path of the data communication in the IP network 1 on the basis of routing information in the IP network 1 set in advance when the path control is decided to be necessary is used. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a wide area mobile information communication method, a mobile information communication edge router apparatus, and a wide area mobile information communication system apparatus, and more particularly, to an IP network and one or more content servers arranged in an arbitrary network area including the IP network. A plurality of access line networks of arbitrary types, a plurality of nodes respectively disposed between both networks for connecting the IP network and the plurality of access line networks, and the plurality of nodes, Wide area mobile information communication method applied to a network system constructed with a terminal device capable of performing data communication according to the type of a plurality of corresponding access line networks, and directly used for its implementation The present invention relates to a mobile information communication edge router device and a wide area mobile information communication system device.

  In recent years, terminal devices that can access a plurality of access line networks such as a wireless local area network (LAN), a so-called “hot spot LAN”, a PHS network (Personal Handy-phone System), a third generation mobile phone network, etc. A wide area mobile information communication service that enables seamless communication without causing interruptions in data being distributed even when a terminal device arbitrarily moves between the plurality of access line networks. It has been put into practical use.

  FIG. 4 is a network configuration diagram of a wide area mobile information communication system apparatus applied to a conventional wide area mobile information communication service.

  As shown in the figure, a conventional wide area mobile information communication system α includes an IP network (IP) 1 such as the Internet, a higher content server 2a as a plurality of content servers, and three lower content servers 2b and 2c. And 2d, a content distribution network (so-called CDN: Content Delivery Server) 3 and four in-network edge router apparatuses 4a for connecting the upper content server 2a and the lower content servers 2b to 2d to the content distribution network 3, respectively. 4b, 4c and 4d, three access line networks 5a, 5b and 5c of any kind, and a plurality of networks arranged between both networks for connecting the IP network 1 and the access line networks 5a to 5c. Three edge router devices 6a, 6b and 6c, which are nodes of Between the over motor unit 6 a to 6 c, it is constructed with a terminal device 7 capable of performing the data communication in accordance with the type of corresponding access line network bodies 5a to 5c.

  Here, the high-order content server 2a is composed of a high-quality video streaming server such as VOD (Video On Demand), a live streaming server having a real-time property, or a file transfer type server including a game server. The lower content servers 2b to 2d function as a cache server or a mirror server that caches or mirrors content in the upper content server 2a.

  The IP network 1 and the content distribution network 3 include boundary edge router devices 6d and 6e shown in the figure having the same configuration as the boundary edge router devices 6a to 6c arranged between the access line networks 5a to 5c. The subordinate content servers 2b and 2c shown in the figure are connected to each other through in-network edge router devices 4b and 4c that connect to the content distribution network 3.

  In this example, as the plurality of access line networks 5a to 5c, the allowable communication speeds connected to the border edge router devices 6a to 6c via the base stations 51, 52, and 53 are IEEE802.11 (IEEE: "Wireless LAN" that is tens to tens of Mbps conforming to the American Institute of Electrical and Electronics Engineers, "PHS network" that is 64 kbps conforming to ISDN (Integrated Services Digital Network), and 384 kbps that is permissible communication speed The “third generation mobile phone network” is assumed.

  The terminal device 7 includes a PC (Personal Computer), a PDA (Personal Digital Assistant), and the like, and has a selective channel transmission / reception function for the plurality of access line networks 5a to 5c.

  Next, FIG. 5 is a functional configuration diagram of the conventional boundary edge router devices 6a to 6e shown in FIG.

  As shown in the figure, the conventional border edge router device 6 (6a to 6e) receives all IPs transmitted to and received from the IP network 1 through the access line network interface processing unit 61 and the IP network interface processing unit 62. An IP packet processing unit 63 that performs packet path control and the like, a mobile IP processing unit 64 that performs encapsulation of the IP packet acquired by the IP packet processing unit 63, decapsulation of the mobile IP packet, and the like, and the boundary edge An interface table 65 that holds an allowable communication speed related to the access line network 5 (5a to 5c) connected to the router device 6 via the base station 50 (51 to 53), and a mobile IP tunnel setting by the mobile IP processing unit 64 And a routing table 66 used for route control at the time.

  In the conventional wide area mobile information communication system device α constructed as described above, the terminal device 7 is connected from the service area in one access line network (for example, the wireless LAN access line network 5a) to another access line network (for example, As a route control method in the IP network 1 when moving to a service area in the access line network 5b) of the PHS network, a method of applying mobile IP connection via a home agent (details will be described later) (illustrated) (I) route setting) and a method of applying direct switching connection to the nearest access line network 5 at the destination of the terminal device 7 (route setting (ii) in the figure) are known.

Hereinafter, a route control method using mobile IP connection will be described.
FIG. 6 is a sequence diagram for explaining an operation example when performing route control by mobile IP connection in the conventional wide area mobile information communication system apparatus α shown in FIGS. 4 and 5.

  As shown in the figure, first, it is assumed that the terminal device 7 has moved from the service area in the wireless LAN access line network 5a to the service area in the access line network 5b of the PHS network (ST1).

  At this time, the border edge router device 6b connected to the access line network 5b of the PHS network has “home agent [HA]” as the border edge router device 6a connected to the access line network 5a of the wireless LAN. It functions as an “external agent [FA]” and periodically broadcasts an agent advertisement to all terminal devices 5 on the link (ST2) (the processing of the IP packet processing unit 63).

  In the above state, the terminal device 7 examines the agent advertisement received from the border edge router device 6b connected to the access line network 5b of the PHS network, and determines that it has moved (connected) to the external link ( ST3).

  Next, when the connection state of the terminal device 7 is an external link connection, the terminal device 7 acquires a care-of address from the received agent advertisement (ST4), and further sends a registration request message related to the care-of address to the wireless agent that is the home agent. The data is transmitted to the boundary edge router [HA] 6a connected to the base station 51 in the LAN access line network 5a (ST5).

  As a result, a registration request message (care-of address notification) is transmitted from the terminal device 7 to the edge router device [FA] 6b connected to the access line network 5b of the PHS network via the IP network 1, and The registration request message is transmitted via the IP network 1 from the edge router device [FA] 6b to the boundary edge router device [HA] 6a connected to the wireless LAN access line network 5a.

  On the other hand, the border edge router device [HA] 6a connected to the access line network 5a of the wireless LAN judges the validity when receiving the registration request message, and if it is valid, The reachability of the home address to the network prefix is advertised (ST6), and its own routing table 66 is updated.

  As a result, the border edge router device [HA] 6a connected to the access line network 5a of the wireless LAN passes from the border edge router device [FA] 4b connected to the access line network 5b of the PHS network through the IP network 1. Then, a registration response message for the registration request message is transmitted (ST7), and further, the registration response message is transmitted from the border edge router device [FA] 6b to the terminal device 7 via the base station 52 (above). , Mobile IP control by processing of the mobile IP control unit 64).

  Next, when the terminal device 7 receives the registration response message, the terminal device 7 recognizes that the control after the movement is completed, and the boundary edge router device [FA] 6b connected to the base station 52 in the access line network 5b of the PHS network. , The IP network 1, the border edge router device [HA] 6a connected to the wireless LAN access line network 5a, the border edge router device 6d, and the in-network edge router device 4b, in that order, in the content distribution network 3. The content request message is transmitted to the content server 2 (here, the lower content server 2b) (ST8).

  On the other hand, the lower content server 2b is connected to the access line network 5a of the wireless LAN through the in-network edge router device 4b, the boundary edge router device 6d, and the IP network 1 in this order. A content response message is transmitted to 6a (ST9).

  Accordingly, the border edge router [HA] 6a connected to the access line network 5a of the wireless LAN captures the packet addressed to the home address (ST10), and is further connected to the access line network 5b of the PHS network. The mobile IP tunnel 8 is set toward the border edge router [FA] 6b (ST11). On the other hand, the border edge router device [FA] 6b extracts the original IP packet before being encapsulated (ST12), and sends the extracted IP packet to the terminal device 7 via the base station 52. Deliver (ST13) (the processing of the IP packet processing unit 63).

  As a result of the above, according to the mobile IP connection in the conventional wide area mobile information communication system device α, the content server can be used even when the terminal device 7 moves from the access line network 5a of the wireless LAN to the access line network 5b of the PHS network. It is possible to perform seamless path control while maintaining a session with 2.

The details of the mobile IP control and roaming associated therewith are described in Patent Documents 1 and 2 below.
JP 2000-92562 A JP 2001-2224070 A

On the other hand, a method described in the following non-patent document 1 is known as a method of applying a direct switching connection to the nearest access line network at the destination of the terminal device 7 in the route control in the IP network 1. Yes.
Akihiro Shinto, 4 others, “Session layer mobility support in mobile CDN”, Shingaku Sodai, March 2002

  However, since the route control method based on the mobile IP connection is uniformly performed for all the moving terminal devices 7, the control signal load of the IP network 1 and the boundary edge router device 6 are used in the method. There is a concern that the control load increases. In addition, with this method, it is difficult to continuously ensure seamless route control and safety after route control for QoS (Quality of Service) and secure sessions (secure paths). There is.

  On the other hand, according to the technique of applying the direct switching connection to the nearest access line network 5, the edge routers 4a to 4d in the network that connect the content distribution network 3 and the boundary edge router that connects the access line network 5 Although the distance to the device 6 can be minimized, it is impossible to monitor and distribute resources in the plurality of content servers 2 (2a to 2d) and to control the route in consideration of a load distribution control policy in the content distribution network 3. Therefore, it is difficult to effectively use the network resources between the in-network edge router devices 4a to 4d and the boundary edge router device 6.

  Also, with this method, it is impossible to perform path control in consideration of the status of cache or mirroring in the lower content servers 2b to 2d, the resource status of the whole of the plurality of content servers 2a to 2d, and the like.

Here, the main objects to be solved by the present invention are as follows.
That is, a first object of the present invention is to provide a wide area mobile information communication method, a mobile information communication edge router apparatus, and a wide area mobile information communication system capable of reducing the control signal load of an IP network and the control load of elements in the network. The device is intended to be provided.

  A second object of the present invention is to provide a wide area mobile information communication method, a mobile information communication edge router apparatus and a wide area mobile information communication system apparatus capable of safely performing seamless route control for a secure path. It is.

  A third object of the present invention is to provide a wide area mobile information communication method, a mobile information communication edge router apparatus, and wide area movement information capable of performing flexible and optimal route control according to content characteristics and information related to a content distribution network. It is intended to provide a communication system device.

  Other objects of the present invention will become apparent from the specification, drawings, and particularly the description of each claim.

  First, according to the method of the present invention, as a terminal device moves from one access line network to another access line network in a plurality of access line networks, the IP is transferred from one node to another node in the corresponding plurality of nodes. When a mobile IP tunnel through the network is set up, it is performed with the one node based on the mobile IP packet received from the one node via the mobile IP tunnel at the other node. Based on the identified content characteristics related to the data communication, the identified content characteristics, and the session control management information indicating the quality of the route in the IP network set in advance, The process of determining the necessity of route control for data communication, and if it is determined that route control is necessary as a result of this determination Advance on the basis of the routing information set in the IP network, are sequentially carried out the steps of performing session control for the selection of the data communication of the optimal path within the IP network, take characteristic configuration method called.

  On the other hand, in the router device of the present invention, as the terminal device moves from one access line network to another access line network in a plurality of access line networks, one movement information in a plurality of corresponding mobile information communication edge router devices When a mobile IP tunnel is established from the communication edge router device to another mobile information communication edge router device via the IP network, the other mobile information communication edge router device is connected to the other mobile information communication edge router device via the mobile IP tunnel. Data via the other mobile information communication edge router device based on the mobile IP packet received from the mobile information communication edge router device and the session control management information indicating the quality of the route in the preset IP network Content characteristic processing mechanism means for determining the necessity of communication path control, and the content characteristic A session control mechanism for performing session control relating to selection of an optimum route for data communication in the IP network based on routing information in the IP network set in advance when the routing mechanism is determined to be necessary by the control mechanism means The characteristic constituent means is provided.

  In the system apparatus of the present invention, an IP network, a content distribution network connected to the IP network and having a plurality of content servers, a plurality of access line networks of arbitrary types, an IP network and a plurality of IP networks A plurality of nodes respectively arranged between the two networks to connect to the other access line network, and data communication according to the type of the corresponding plurality of access line networks. In a wide area mobile information communication system constructed with a possible terminal device, the above-described router device of the present invention is provided as a plurality of nodes.

  More specifically, in order to solve the problem, the present invention aims to achieve the above-mentioned object by adopting a novel characteristic configuration method or means ranging from the superordinate concept listed below to the subordinate concept. Is done.

  That is, the first feature of the method of the present invention is that an IP network, one or more content servers arranged in an arbitrary network area including the IP network, a plurality of access line networks of any type, and the IP A plurality of nodes respectively arranged between the two networks for connecting the network and the plurality of access line networks, and the plurality of nodes according to the type of the corresponding plurality of access line networks A wide area mobile information communication method applied to a network system constructed with a terminal device capable of performing data communication, wherein one access line network to another access line in the plurality of access line networks As the terminal device moves to the network, a mobile IP tunnel is established through the IP network from one node to another node in the corresponding plurality of nodes. The content characteristics related to the data communication performed with the one node based on the mobile IP packet received from the one node via the mobile IP tunnel at the other node Based on the identified content characteristics, the session control management information indicating the quality of the route in the IP network set in advance, and the data communication via the other node. The process of determining whether or not the route control is necessary, and when it is determined that the route control is necessary as a result of the determination, based on the routing information in the IP network set in advance, the IP network in the IP network The present invention employs a configuration of a wide area mobile information communication method that sequentially performs a session control process related to selection of an optimum route for data communication.

  The second feature of the method of the present invention is that an IP network, a content distribution network connected to the IP network and having a plurality of content servers, a plurality of access line networks of arbitrary types, and the IP network And a plurality of nodes respectively arranged between the two networks for connecting the plurality of access line networks, and data corresponding to the type of the corresponding plurality of access line networks between the plurality of nodes A wide area mobile information communication method applied to a network system constructed with a terminal device capable of performing communication, from one access line network to another access line network in the plurality of access line networks As the terminal device moves to the mobile node, a mobile IP tunnel is established via the IP network from one node to another node in the corresponding plurality of nodes. Content management information indicating the position of the plurality of content servers in the content distribution network based on the mobile IP packet received from the one node via the mobile IP tunnel at the other node A process of identifying content characteristics related to the data communication performed with the one node based on the received mobile IP packet, the shared content management information, Based on the identified content characteristics and the session control management information indicating the quality of the route in the IP network set in advance, whether or not the route control of the data communication via the other node is necessary is determined. This is set in advance when it is determined that the route control is necessary as a result of the determination process and the result of this determination. Based on the routing information in the IP network, sequentially formed by implementing the process of performing session control for the selection of the data communication of the optimal path within the IP network, in the configuration adopted wide area mobile information communication method.

  A third feature of the method of the present invention is that the step of identifying the content characteristic in the first or second feature of the method of the present invention is a mobile IP transmitted from the terminal device before the mobile IP tunnel is set up. The configuration of the wide area mobile information communication method is implemented when the registration request packet is detected.

  A fourth feature of the method of the present invention is that the step of identifying the content characteristic in the first or second feature of the method of the present invention is a mobile IP transmitted from the terminal device before the mobile IP tunnel is set up. The configuration of the wide area mobile information communication method is implemented when a mobile IP registration response packet transmitted from the one node is detected in response to a registration request packet.

  A fifth feature of the method of the present invention is that the process of performing the session control in the first, second, third or fourth feature of the method of the present invention described above is a processing history for each content characteristic identified to date Adopting a wide area mobile information communication method configuration that accompanies the process of accumulating and managing the content characteristic processing history, and the process of accumulating and managing the session control history that is the history of the session control performed up to now It is in.

  According to a sixth feature of the method of the present invention, in the fifth feature of the method of the present invention, in the process of determining whether or not the route control is necessary, whether or not the identified content characteristic exists in the content characteristic processing history. And if the content characteristic exists in the content characteristic processing history as a result of the determination, the session control is predicted based on the session control history of the corresponding data communication. In the configuration adoption of the wide area mobile information communication method, which is replaced with the process performed in the above.

  A seventh feature of the method of the present invention is that the step of identifying the content characteristic in the first, second, third, fourth, fifth, or sixth feature of the method of the present invention comprises: A wide area mobile information communication method including a step of acquiring a header, which is performed based on one or more elements of the content type, session information, and data amount described in the acquired header The configuration is adopted.

  According to an eighth aspect of the method of the present invention, in the seventh aspect of the method of the present invention, the step of identifying the content characteristic includes a protocol, a format, an application, a URL, and a URL indicating the type of the content during the data communication. A wide area mobile information communication method is adopted based on one or more elements of the encryption method.

  On the other hand, a first feature of the router device of the present invention is to connect an IP network in which one or more content servers are arranged in an arbitrary network area including itself and a plurality of access line networks of arbitrary types. A mobile information communication edge router device disposed between both networks and accessed by a terminal device capable of performing data communication according to the type of the plurality of corresponding access line networks, Along with movement of the terminal device from one access line network to another access line network in the access line network, one mobile information communication edge router device to another mobile information communication in a plurality of corresponding mobile information communication edge router devices When a mobile IP tunnel through the IP network is set over the edge router device, the other mobile information communication edge router Is based on the mobile IP packet received from the one mobile information communication edge router device via the mobile IP tunnel and the session control management information indicating the quality of the route in the IP network set in advance. Content characteristic processing mechanism means for determining whether or not the data communication route control via the other mobile information communication edge router device is necessary, and when the content characteristic processing mechanism means determines that the route control is necessary. And a session control mechanism means for performing session control relating to selection of the optimum route for the data communication in the IP network based on routing information in the IP network set in advance. It is in the configuration adoption of the edge router device.

  The second feature of the router device according to the present invention is that an IP network connected to a content distribution network having a plurality of content servers and a plurality of access line networks of any kind are connected to each other. And a mobile information communication edge router device that is accessed by a terminal device capable of performing data communication according to the type of the plurality of corresponding access line networks, Along with movement of the terminal device from one access line network to another access line network, from one mobile information communication edge router device to another mobile information communication edge router device in a plurality of corresponding mobile information communication edge router devices When the mobile IP tunnel through the IP network is set up, the other mobile information communication edge router device Content management mechanism for sharing content management information representing the positions of the plurality of content servers in the content distribution network based on mobile IP packets received from the one mobile information communication edge router device via the mobile IP tunnel Means, the content management information shared by the content management mechanism means, the received mobile IP packet, and session control management information indicating the quality of the route in the IP network set in advance, Content characteristic processing mechanism means for determining the necessity of route control of the data communication via the other mobile information communication edge router device, and when the content characteristic processing mechanism means determines that the route control is necessary, Based on pre-configured routing information in the IP network Made and a session control mechanism means for performing session control for the selection of the data communication of the optimal path within the IP network, in the configuration adopted for mobile information communication edge router apparatus.

  A third feature of the router device of the present invention is that the content characteristic processing mechanism means in the first or second feature of the router device of the present invention is transmitted from the terminal device before the mobile IP tunnel is set up. When the IP registration request packet is detected, the configuration of the mobile information communication edge router device, which is a functional means for determining whether or not the required route control is necessary, is employed.

  A fourth feature of the router device of the present invention is that the content characteristic processing mechanism means in the first or second feature of the router device of the present invention is transmitted from the terminal device before the mobile IP tunnel is set up. It is a functional means for determining whether or not the required route control is necessary when a mobile IP registration response packet transmitted from the one mobile information communication edge router device is detected in response to an IP registration request packet. The configuration of the mobile information communication edge router device is adopted.

  The fifth feature of the router device of the present invention is that the content characteristic processing mechanism means in the first, third, or fourth feature of the router device of the present invention performs the one movement based on the received mobile IP packet. Content characteristic identifying means for identifying the content characteristic related to the data communication performed with the information communication edge router device, the content characteristic identified by the content characteristic identifying means, and the session control set in advance The configuration of the mobile information communication edge router apparatus includes route control necessity determination means for determining whether or not the data communication route control is necessary based on management information.

  A sixth feature of the router device of the present invention is that the content characteristic processing mechanism means according to the second, third or fourth feature of the router device of the present invention is configured to perform the one movement based on the received mobile IP packet. Content characteristic identifying means for identifying content characteristics related to the data communication performed with the information communication edge router device, the content management information shared by the content management mechanism means, and identification by the content characteristic identification means Mobile information communication comprising route control necessity judgment means for judging whether or not the data communication route control is necessary based on the set content characteristics and the session control management information set in advance It is in the configuration adoption of the edge router device.

  The seventh feature of the router device of the present invention is that the session control mechanism means in the fifth or sixth feature of the present invention router device performs processing for each content characteristic identified to date by the content characteristic identification means. Functional means for accumulating / managing content characteristic processing history as history, and functional means for accumulating / managing session control history as history of the session control performed so far in the session control mechanism means. Thus, the configuration of the mobile information communication edge router apparatus is employed.

  The eighth feature of the present invention router apparatus is that the above-mentioned content characteristic identified by the content characteristic identification means is the content characteristic processing history in the route control necessity judging means in the seventh feature of the present invention router apparatus. A function means for determining whether or not the content characteristic exists in the content characteristic processing history based on the session control history of the corresponding data communication when the content characteristic exists in the content characteristic processing history. The mobile information communication edge router apparatus is configured to include a functional unit that predictively performs the session control.

  A ninth feature of the router device of the present invention is that the content characteristic processing mechanism means in the fifth, sixth, seventh, or eighth feature of the router device of the present invention acquires a header of the received IP packet. Filtering means, wherein the content characteristic identification means is based on one or more elements of the content type, session information, and data amount described in the header acquired by the packet filtering means. The configuration is a mobile information communication edge router device, which is a functional means for identifying the required content characteristics.

  According to a tenth feature of the router device of the present invention, the content characteristic identification means in the ninth feature of the router device of the present invention is a protocol, format, application, URL, and URL indicating the type of the content during the data communication. A configuration of the mobile information communication edge router device is a functional means for identifying the required content characteristic based on one or more elements of the encryption method.

  On the other hand, the first feature of the system device of the present invention is that an IP network, one or more content servers arranged in an arbitrary network area including the IP network, a plurality of access line networks of arbitrary types, A plurality of nodes respectively arranged between the two networks for connecting the IP network and the plurality of access line networks, and the corresponding types of the plurality of access line networks corresponding to the plurality of nodes. A wide area mobile information communication system apparatus constructed with a terminal apparatus capable of performing data communication, wherein the plurality of nodes are respectively the first, second and third of the router of the present invention. , 4, 5th, 6th, 7th, 8th, 9th, or 10th features, the configuration is a wide area mobile information communication system device that is a mobile information communication edge router device.

  The second feature of the system apparatus of the present invention is that an IP network, a content distribution network connected to the IP network and having a plurality of content servers, a plurality of access line networks of any kind, and the IP A plurality of nodes respectively arranged between the two networks for connecting the network and the plurality of access line networks, and according to the type of the plurality of corresponding access line networks between the plurality of nodes. A wide area mobile information communication system device configured to have a terminal device capable of performing data communication, wherein the plurality of nodes are respectively the first, second, third, The configuration of the wide area mobile information communication system apparatus, which is the mobile information communication edge router apparatus in the fourth, fifth, sixth, seventh, eighth, ninth, or tenth feature.

  According to the present invention, it is possible to reduce the control signal load of the IP network and the control load of the elements in the network, and it is possible to safely perform seamless route control for the secure path, and It is possible to perform flexible and optimal route control according to the characteristics and content management information related to monitoring / distribution in the content distribution network.

  Along with this, users can move regardless of time and place even when viewing content on video transfer servers, live streaming servers, or file transfer servers including game servers. It is possible to receive a content distribution service seamlessly in the middle or at the destination.

  In addition, since session control oriented to the characteristics of content in cooperation with the content server is performed, it is possible to effectively use end-to-end network resources including content distribution networks as well as users.

  In addition, it is possible to perform session control that maintains and secures the characteristics of secure paths such as QoS and VPN (Virtual Private Network) that should be prioritized, ensuring both mobility and safety at the same time. Can do.

  Furthermore, since session control is automatically performed between a plurality of mobile information communication edge router devices, it is necessary to prepare session control software in the terminal device and to provide a separate server for session control. It can be easily introduced.

  In addition, since information related to the content characteristic processing history and session control history of data communication performed in the past is accumulated and used as necessary, the performance related to path control can be improved. it can.

  In addition, since data analysis processing in a higher layer of content packets in a mobile information communication edge router device is performed and content management information is shared and shared among a plurality of mobile information communication edge router devices, for example, a terminal It can be expected to be deployed and applied to content filtering services that consider device mobility and mobile security services such as firewall services.

  DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the accompanying drawings and examples of the apparatus and corresponding methods. In the drawings used in the description of the present embodiment, the same reference numerals are assigned to the same components as those shown in the conventional drawings.

(Example of equipment)
First, FIG. 1 is a network construction diagram of a wide area mobile information communication system apparatus according to an apparatus example of the present invention.

  As shown in the figure, a wide area mobile information communication system device β according to this example device includes an IP network 1 such as the Internet, a higher content server 2a as a plurality of content servers, and three lower content servers 2b, 2c and 2d. Content distribution network 3 and four in-network edge router devices 4a and 4b, 4c and 4d for connecting these upper content server 2a and lower content servers 2b to 2d to the content distribution network 3, respectively, and any type 3 mobile information communication edge routers which are a plurality of nodes respectively arranged between the three access line networks 5a, 5b and 5c and the IP network 1 and the access line networks 5a to 5c for connecting the access network 5a to 5c. Between the devices 9a, 9b and 9c and the mobile information communication edge router devices 9a to 9c. It is constructed with a terminal device capable 7 to perform data communication according to the type of access line networks 5a~5c to.

  In principle, it is possible to provide one or more content servers in the IP network 1 instead of the upper content server 2a and the lower content servers 2b to 2d in the content distribution network 3.

  Here, the high-order content server 2a is composed of a high-definition video streaming server such as VOD, a live streaming server having a real-time property, or a file transfer server including a game server.

  The lower content servers 2b to 2d function as a cache server or a mirror server that caches or mirrors content in the upper content server 2a. Further, the IP network 1 and the content distribution network 3 are the edge in the network that connects the illustrated boundary edge router devices 6d and 6e and the illustrated lower content servers 2b and 2c to the content distribution network 3 having the same configuration as the conventional one. The router devices 4b and 4c are connected to each other.

  Even in this apparatus example, as the plurality of access line networks 5a to 5c, the allowable communication speeds connected to the boundary edge router apparatuses 6a to 6c via the base stations 51, 52, and 53 are IEEE802. "Wireless LAN" that is tens to tens of Mbps in conformity with "11", "PHS network" in which the permissible communication speed is 64 kbps conforming to ISDN, and "Third generation mobile phone network" in which the permissible communication speed is 384 kbps Is assumed.

  The terminal device 7 includes a PC, a PDA, and the like, and has a selective channel transmission / reception function for the plurality of access line networks 5a to 5c.

  Next, FIG. 2 is a functional configuration diagram of the mobile information communication edge router devices 9a to 9c shown in FIG.

  As shown in the figure, the mobile information communication edge router device 9 (9a to 9c) according to the present apparatus example transmits / receives to / from the IP network 1 through the access line network interface processing unit 91 and the IP network interface processing unit 92. An IP packet processing unit 93 that performs route control of all IP packets to be performed, and a mobile IP processing unit 94 that performs encapsulation of the IP packet acquired by the IP packet processing unit 93 and decapsulation of the mobile IP packet. An interface table 95 that holds an allowable communication speed related to the access line network 5 (5a to 5c) connected to the mobile information communication edge router device 9 via the base station 50 (51 to 53), and a mobile IP processing unit In addition to the routing table 96 used for route control when setting the mobile IP tunnel according to 94, A content management mechanism 97, a content characteristic processing mechanism 98, and a session control mechanism 99 constructed.

  Here, the content management mechanism 97, the content characteristic processing mechanism 98, and the session control mechanism 99 respond to the movement of the terminal device 7 from one access line network to another access line network in the access line networks 5a to 5c. Means for functioning when a mobile IP tunnel through the IP network 1 is set from one mobile information communication edge router device to another mobile information communication edge router device in the plurality of mobile information communication edge router devices 9a to 9c Specifically, each has the following functional means.

  That is, the content management mechanism 97 determines whether the upper content server 2a and the lower content servers 2b to 2d in the content distribution network 3 are based on the mobile IP packet received from one mobile information communication edge router device via the mobile IP tunnel. Content management information indicating the position, that is, information regarding the position of the cache and mirror shared when cooperating with the in-network edge router devices 4a to 4d in the content distribution network 3, information regarding the resource distribution algorithm, and contents described later if necessary This is a functional means for sharing information related to the characteristic processing history through the content management table 97a.

  Further, the content characteristic processing mechanism 98 is content management information shared by the content management mechanism 97, the received mobile IP packet, and session control management information indicating the quality of the route in the preset IP network, that is, It is a functional means for determining the necessity of route control for data communication via another mobile information communication edge router device based on information on QoS, security, etc. on the route and information on a session control history described later if necessary. .

  Specifically, the packet filtering unit 98a that acquires the header of the received IP packet, and one or more elements of the content type, session information, and data amount described in the header acquired by the packet filtering unit 98a (In terms of type, one or more elements of protocol, format, application, URL (Uniform Resource Locator), and encryption method. Depending on these elements, whether the content being viewed is a video streaming system, a live streaming system, or a file Content type identification unit 98b that identifies content characteristics related to data communication performed with one mobile information communication edge router device and the content management mechanism 97. Content management information and content A path control necessity determination unit 98c that determines whether or not the data communication path control is necessary based on the content characteristics identified by the sex identification unit 98b and the session control management information set in advance. Is done.

  In the case where one or more content servers are provided in the IP network 1 instead of the upper content server 2a and the lower content servers 2b to 2d in the content distribution network 3, the content management mechanism 97 relates to the content distribution network 3. Since the content management information cannot be shared, the route control necessity determination unit 98c in the content characteristic processing mechanism 98 has a function to determine whether or not the required route control is necessary based only on the content characteristic and the session control management information. To do.

  In addition, the route control necessity determination unit 98c in the content characteristic processing mechanism 98 transmits a mobile IP registration request packet (message) or the mobile IP registration request packet transmitted from the terminal device 7 before setting the mobile IP tunnel. In response, a functional means for determining whether or not necessary route control is necessary when a mobile IP registration response packet (message) transmitted from one mobile information communication edge router apparatus is detected by the IP packet processing unit 93. Constitute.

  On the other hand, when the content characteristic processing mechanism 98 determines that the path control is necessary, the session control mechanism 99 is based on the routing information in the IP network 1 set in advance in the session control table 99a. 1 is a functional means for performing session control related to selection of an optimum route for data communication within the network.

  Specifically, the function means for storing and managing the content characteristic processing history, which is the processing history for each content characteristic identified by the content characteristic identifying unit 98b, by the content management table 97a of the content management mechanism 97, and the session control The mechanism 99 includes a session control processing unit 99c having functional means for storing and managing a session control history, which is a history of session control performed so far, in the mechanism 99 in the session control management table 99b.

  The illustrated session control database 99d stores various information necessary for generating routing information set in the session control table 99a.

  In addition, the path control necessity determination unit 98c in the content characteristic processing mechanism 98 replaces the function for determining whether or not the path control is necessary with the content characteristic identified by the content characteristic identification unit 98b. Functional means for determining whether or not the content characteristic processing history stored in the content management table 97a exists, and if the result of this determination indicates that the content characteristic exists in the content characteristic processing history, the session control mechanism Functional means for predictively performing session control based on the session control history of the corresponding data communication accumulated in the 99 session control management table 99b may be employed.

Next, services provided by the wide area mobile information communication system apparatus β constructed as described above will be described.
First, as a premise, the terminal device 7 existing in the service area of the access line network 5a of the wireless LAN, the lower content server 2b constituting the cache or mirror → the edge router device 4b in the network → the boundary edge router device 6d → the mobile information communication edge It is assumed that the file transfer type content is being viewed on the route from the router device 9a to the base station 51 (the route indicated by the dotted arrow in the figure).

  In the above state, when the terminal device 7 moves to the service area in the access line network 5b of the PHS network, the route by the conventional mobile IP connection is based on the content characteristics and session control management information or content management information regarding the current viewing content. The following three routes except for can be adopted.

  That is, the lower content server 2b → the edge router device 4b in the network → the boundary edge router device 6d → the mobile information communication edge router device 9b → the route of the base station 52 (route (I) shown in the figure) The lower content server 2c closest to the mobile information communication edge router device 9b → the edge router device 4c in the network → the boundary edge router device 6e → the mobile information communication edge router device 9a → (via the mobile IP tunnel) → Mobile information communication edge router device 9b → route of base station 52 (route (II) in the figure) and the nearest lower content server 2c → intra-network edge router device 4c → boundary edge router device 6e → mobile information communication edge The route from the router device 9b to the base station 52 (route (III) in the figure).

  Further, by the terminal device 7 existing in the service area of the access line network 5b of the PHS network, the upper content server 2a → the edge router device 4a in the network → the edge router device 4c in the network → the edge router device 6e → the mobile information communication edge router It is assumed that content without a cache such as a live streaming system is being viewed on the route from the device 9b to the base station 52 (routed arrow in the drawing).

In this state, when the terminal device 7 moves to the service area in the access line network 5c of the third generation mobile phone network, the next route excluding the route by the conventional mobile IP connection, that is, the upper content server 2a → the edge in the network The route (route (IV) shown in the figure) of the router device 4a → the edge router device 4c in the network → the boundary edge router device 6e → the mobile information communication edge router device 9c → the base station 53 can be adopted.
The wide area mobile information communication system apparatus β according to the apparatus example of the present invention provides a service that can take any of the above four paths.

(Example method)
Next, an example of a method implemented by the wide area mobile information communication system apparatus β constructed as described above will be described.
FIG. 3 is a sequence diagram for explaining an operation example of the wide area mobile information communication system apparatus β shown in FIGS. 1 and 2.

  As shown in the figure, first, it is assumed that the terminal device 7 has moved from the service area in the wireless LAN access line network 5a to the service area in the access line network 5b of the PHS network (ST1).

  At this time, the mobile information communication edge router device 9b connected to the access line network 5b of the PHS network designates the mobile information communication edge router device 9a connected to the access line network 5a of the wireless LAN as “home agent [HA]”. It functions as the “foreign agent [FA]” and broadcasts the agent advertisement periodically to all the terminal devices 5 on the link (ST2) (the processing of the IP packet processing unit 93).

  In the above state, the terminal device 7 and the mobile information communication edge router devices [HA] 9a and [FA] 9b perform the same mobile IP control (ST3 to ST7 in FIG. 6) as the conventional example, and then the PHS network Mobile information communication edge router device [FA] 9b connected to base station 52 in access line network 5b, IP network 1, mobile information communication edge router device [HA] 9a connected to wireless LAN access line network 5a, boundary A content request message is transmitted to a predetermined content server 2 (here, lower content server 2b) in the content distribution network 3 through the edge router device 6d and the in-network edge router device 4b in this order (ST8). .

  On the other hand, the content server 2b is connected to the mobile information communication edge router [HA] connected to the access line network 5a of the wireless LAN through the in-network edge router 4b, the boundary edge router 6d, and the IP network 1 in this order. ] A content response message is transmitted to 9a (ST9).

  As a result, the mobile information communication edge router [HA] 9a connected to the access line network 5a of the wireless LAN captures the packet addressed to the home address as in the conventional example (ST10), and further accesses the PHS network. The mobile IP tunnel 8 is set for the mobile information communication edge router [FA] 9b connected to the line network 5b (ST11).

  On the other hand, the IP packet processing unit 93 of the mobile information communication edge router [FA] 9b acquires (removes) the original IP packet before being encapsulated (ST21). The content characteristic processing mechanism 98 of the router device [FA] 9b first obtains the header of the obtained IP packet and performs the filtering in the packet filtering unit 98a (ST22).

  Next, in the content characteristic identification unit 98b, one or more elements of the content type, session information, and data amount described in the acquired header (in terms of type, protocol, format, application, URL, And one or more elements of the encryption method), the content characteristic relating to data communication performed with the mobile information communication edge router [HA] 9a is identified (ST23).

  Further, in the route control necessity determination unit 98c, the identified content characteristics and the session control management information accumulated in the session control management table 99b of the session control mechanism 99, that is, information on QoS and security related to the route. Based on this (in this case, the existence of the content distribution network 3 is not essential), it is determined whether or not the route control of the data communication via the mobile information communication edge router [FA] 9b is necessary (ST24).

  Here, the route control necessity determination unit 98c of the content characteristic processing mechanism 98 performs the mobile IP registration request packet (message) or the mobile IP registration request packet transmitted from the terminal device 7 before setting the mobile IP tunnel. The mobile packet registration response packet (message) transmitted from the mobile information communication edge router [HA] 9a is detected by the IP packet processing unit 93 in response to the request, and the necessity of necessary route control is determined. .

  Further, the route control necessity determination unit 98c further performs content management information stored in the content management table 97a of the content management mechanism 97, that is, at the time of cooperation with the in-network edge router devices 4a to 4d in the content distribution network 3. Based on information on the location of the shared cache and mirror and information on the resource distribution algorithm (in this case, the existence of the content distribution network 3 is essential), it is determined whether or not the required route control is necessary.

  The route control necessity determination unit 98c determines the necessity of necessary route control, and the content characteristic identified by the content characteristic identification unit 98b is stored in the content management table 97a of the content management mechanism 97. It is determined whether or not it exists in the processing history.

  If it is determined that the content characteristic exists in the content characteristic processing history, the session control is performed based on the session control history of the corresponding data communication accumulated in the session control management table 99b of the session control mechanism 99. Can also be performed predictively. When this alternative method is adopted, the determination processing speed is increased, and the performance in the path control is improved.

  Next, when the determination result of the path control by the path control necessity determination unit 98c of the content characteristic processing mechanism 98 is “control required”, the mobile information communication edge router device [FA connected to the access line network 5b of the PHS network [FA] 9b after the required session control processing is performed in the session control processing unit 99c of the session control mechanism 99 (ST25), or when the determination result is “control rejected”, the session control is not performed. Then, the IP packet processing unit 93 delivers the IP packet previously acquired in the process of ST21 to the terminal device 7 via the base station 52 (ST26).

  Then, the mobile information communication edge router device [FA] 9b connected to the access line network 5b of the PHS network, for each content characteristic identified this time (to date) by the session control processing unit 99c of the session control mechanism 99. Is stored and managed in the content management table 97a of the content management mechanism 97 (ST27), and the session control history that is the history of session control performed this time (to date) is stored. The data is stored and managed in the session control management table 99b (ST28).

  On the other hand, the mobile information communication edge router device [HA] 9a connected to the access line network 5a of the wireless LAN is also connected to the mobile information communication edge router device [FA] 9b connected to the access line network 5b of the PHS network. In accordance with the session control processing of ST25, the session control processing unit 99c of the session control mechanism 99 performs the required session control processing (ST29). The session control history, which is the history of session control performed up to now, is stored and managed in the session control management table 99b (ST30).

  As described above, the embodiments of the present invention have been described with reference to the apparatus examples and the corresponding method examples. However, the present invention is not necessarily limited only to the above-described means and methods, and the above-described effects can be obtained. Changes can be made as appropriate within the range that they have.

  For example, in the present embodiment, as an example of the plurality of access line networks 5 (5a to 5c), a wireless LAN, a PHS network, and a third-generation mobile phone network have been described as examples. However, the present invention is not limited to these. The present invention can be similarly applied to a wireless access line network or a wired access line network.

It is a network block diagram of the wide area mobile information communication system apparatus which concerns on the apparatus example of this invention. It is a function block diagram of the mobile information communication edge router apparatus shown in FIG. It is a sequence diagram for demonstrating one operation example of the wide area mobile information communication system apparatus shown in FIG.1 and FIG.2. It is a network block diagram of the wide area mobile information communication system apparatus applied to the conventional wide area mobile information communication service. It is a functional block diagram of the conventional boundary edge router apparatus shown in FIG. FIG. 6 is a sequence diagram for explaining an operation example when performing route control by mobile IP connection in the conventional wide area mobile information communication system apparatus shown in FIGS. 4 and 5.

Explanation of symbols

α, β: Wide area mobile information communication system device 1 ... IP network 2 ... Content server 2a ... Upper content server 2b-2d ... Lower content server 3 ... Content distribution network 4a-4d ... Intra-network edge router device 5 (5a-5c) ... access line network 50 (51 to 53) ... base station 6 (6a to 6e) ... border edge router device 61 ... access line network interface processing unit 62 ... IP network interface processing unit 63 ... IP packet processing unit 64 ... mobile IP processing Unit 65 ... Interface table 66 ... Routing table 7 ... Terminal device 8 ... Mobile IP tunnel 9 (9a-9c) ... Mobile information communication edge router device 91 ... Access line network interface processing unit 92 ... IP network interface processing unit 93 ... IP packet Processing unit 94 ... Mobile IP processing DESCRIPTION OF SYMBOLS 95 ... Interface table 96 ... Routing table 97 ... Content management mechanism 97a ... Content management table 98 ... Content characteristic processing mechanism 98a ... Packet filtering part 98b ... Content characteristic identification part 98c ... Path control necessity judgment part 99 ... Session control mechanism 99a ... Session control table 99b ... Session control management table 99c ... Session control processing unit 99d ... Session control database

Claims (20)

An IP network, one or more content servers arranged in an arbitrary network area including the IP network, a plurality of access line networks of an arbitrary type, and the IP network and the plurality of access line networks are connected. Therefore, a plurality of nodes respectively disposed between both networks, and a terminal device capable of performing data communication according to the type of the corresponding plurality of access line networks between the plurality of nodes. A wide area mobile information communication method applied to a network system constructed and comprising:
With the movement of the terminal device from one access line network to another access line network in the plurality of access line networks, from one node to another node in the corresponding plurality of nodes via the IP network When the mobile IP tunnel is set up,
In that other node,
Identifying a content characteristic related to the data communication performed with the one node based on a mobile IP packet received from the one node via the mobile IP tunnel;
Based on the identified content characteristics and the session control management information indicating the quality of the route in the IP network set in advance, whether or not the route control of the data communication via the other node is necessary is determined. The process of judging,
As a result of this determination, when it is determined that the route control is necessary, session control related to selection of the optimum route for the data communication in the IP network is performed based on the routing information in the IP network set in advance. Sequentially performing the process of performing,
A wide area mobile information communication method. Connecting an IP network, a content distribution network connected to the IP network and having a plurality of content servers, a plurality of access line networks of any type, and the IP network and the plurality of access line networks A plurality of nodes respectively disposed between the two networks, and a terminal device capable of performing data communication according to the type of the corresponding plurality of access line networks between the plurality of nodes. A wide area mobile information communication method applied to a network system constructed with
With the movement of the terminal device from one access line network to another access line network in the plurality of access line networks, from one node to another node in the corresponding plurality of nodes via the IP network When the mobile IP tunnel is set up,
In that other node,
Sharing content management information representing the positions of the plurality of content servers in the content distribution network based on mobile IP packets received from the one node via the mobile IP tunnel;
Identifying a content characteristic related to the data communication performed with the one node based on the received mobile IP packet;
Based on the shared content management information, the identified content characteristics, and session control management information indicating the quality of the route in the IP network set in advance, via the other node Determining whether or not the data communication path control is necessary;
As a result of this determination, when it is determined that the route control is necessary, session control related to selection of the optimum route for the data communication in the IP network is performed based on the routing information in the IP network set in advance. Sequentially performing the process of performing,
A wide area mobile information communication method. The process of identifying the content characteristic includes:
Before setting the mobile IP tunnel, the mobile IP registration request packet transmitted from the terminal device is detected as a trigger,
The wide area mobile information communication method according to claim 1 or 2. The process of identifying the content characteristic includes:
Before setting the mobile IP tunnel, the mobile IP registration response packet transmitted from the one node is detected in response to the mobile IP registration request packet transmitted from the terminal device.
The wide area mobile information communication method according to claim 1 or 2. The session control process includes:
A process of accumulating and managing a content characteristic processing history that is a processing history for each content characteristic identified to date;
Accumulating and managing a session control history that is a history of the session control performed to date,
The wide area mobile information communication method according to claim 1, 2, 3, or 4. The process of determining whether route control is necessary is as follows:
Determining whether the identified content characteristic is present in the content characteristic processing history;
As a result of the determination, when the content characteristic exists in the content characteristic processing history, the process is replaced with a process of performing the session control predictively based on the session control history of the corresponding data communication. The
The wide area mobile information communication method according to claim 5. The process of identifying the content characteristic includes:
Obtaining a header of the received IP packet;
Implemented based on one or more elements of the content type, session information, and data amount described in the acquired header.
The wide area mobile information communication method according to claim 1, 2, 3, 4, 5, or 6. The process of identifying the content characteristic includes:
Implemented based on one or more elements of a protocol, a format, an application, a URL, and an encryption method indicating the type of the content during the data communication.
The wide area mobile information communication method according to claim 7. In order to connect an IP network in which one or more content servers are arranged in an arbitrary network area including itself and a plurality of access line networks of an arbitrary type, the plurality of corresponding networks are respectively arranged between both networks. A mobile information communication edge router device accessed by a terminal device capable of performing data communication according to the type of the access line network,
With the movement of the terminal device from one access line network to another access line network in the plurality of access line networks, from one mobile information communication edge router device to another in a plurality of corresponding mobile information communication edge router devices When the mobile IP tunnel through the IP network is set over the mobile information communication edge router device,
The other mobile information communication edge router device is
Based on the mobile IP packet received from the one mobile information communication edge router device via the mobile IP tunnel and the session control management information indicating the quality of the route in the IP network set in advance, Content characteristic processing mechanism means for determining the necessity of route control of the data communication via another mobile information communication edge router device;
A session relating to selection of the optimum route for the data communication in the IP network based on the routing information in the IP network set in advance when the content characteristic processing mechanism means determines that the route control is necessary Session control mechanism means for performing control,
The mobile information communication edge router apparatus characterized by the above-mentioned. In order to connect an IP network connected to a content distribution network having a plurality of content servers and a plurality of access line networks of an arbitrary type, the plurality of corresponding access respectively arranged between both networks A mobile information communication edge router device accessed by a terminal device capable of performing data communication according to the type of line network,
With the movement of the terminal device from one access line network to another access line network in the plurality of access line networks, from one mobile information communication edge router device to another in a plurality of corresponding mobile information communication edge router devices When the mobile IP tunnel through the IP network is set over the mobile information communication edge router device,
The other mobile information communication edge router device is
Content management mechanism for sharing content management information representing the positions of the plurality of content servers in the content distribution network based on mobile IP packets received from the one mobile information communication edge router device via the mobile IP tunnel Means,
Based on the content management information shared by the content management mechanism means, the received mobile IP packet, and session control management information indicating the quality of the route in the IP network set in advance, the other Content characteristic processing mechanism means for determining the necessity of route control of the data communication via the mobile information communication edge router device;
A session relating to selection of the optimum route for the data communication in the IP network based on the routing information in the IP network set in advance when the content characteristic processing mechanism means determines that the route control is necessary Session control mechanism means for performing control,
The mobile information communication edge router apparatus characterized by the above-mentioned. The content characteristic processing mechanism means includes:
Before setting the mobile IP tunnel, it is a functional means for determining whether or not the required route control is necessary when a mobile IP registration request packet transmitted from the terminal device is detected.
The mobile information communication edge router device according to claim 9 or 10, characterized in that The content characteristic processing mechanism means includes:
Before the mobile IP tunnel is set up, triggered by detection of a mobile IP registration response packet transmitted from the one mobile information communication edge router device in response to a mobile IP registration request packet transmitted from the terminal device , Functional means for determining the necessity of the required route control,
The mobile information communication edge router device according to claim 9 or 10, characterized in that The content characteristic processing mechanism means includes:
Content characteristic identification means for identifying content characteristics related to the data communication performed with the one mobile information communication edge router device based on the received mobile IP packet;
Path control necessity judgment means for judging whether or not the data communication path control is necessary based on the content characteristics identified by the content characteristic identification means and the session control management information set in advance. Have
The mobile information communication edge router device according to claim 9, 11 or 12. The content characteristic processing mechanism means includes:
Content characteristic identification means for identifying content characteristics related to the data communication performed with the one mobile information communication edge router device based on the received mobile IP packet;
Based on the content management information shared by the content management mechanism means, the content characteristics identified by the content characteristics identification means, and the session control management information set in advance, the data communication path control Route control necessity judgment means for judging whether or not
The mobile information communication edge router device according to claim 10, 11 or 12. The session control mechanism means includes:
Functional means for accumulating and managing a content characteristic processing history that is a processing history for each of the content characteristics identified to date in the content characteristic identifying means;
A function means for storing and managing a session control history that is a history of the session control performed so far in the session control mechanism means;
15. The mobile information communication edge router device according to claim 13 or 14, The route control necessity determination means includes:
Functional means for determining whether or not the content characteristic identified by the content characteristic identification means exists in the content characteristic processing history;
As a result of this determination, when the content characteristic exists in the content characteristic processing history, a function unit that predictively performs the session control based on the session control history of the data communication is replaced. Have
The mobile information communication edge router device according to claim 15, wherein The content characteristic processing mechanism means includes:
Further comprising packet filtering means for obtaining a header of the received IP packet;
The content characteristic identifying means includes
The function means for identifying the required content characteristic based on one or more elements of the content type, session information, and data amount described in the header acquired by the packet filtering means,
The mobile information communication edge router device according to claim 13, 14, 15, or 16. The content characteristic identifying means includes
Functional means for identifying the required content characteristic based on one or more elements of a protocol, a format, an application, a URL, and an encryption method indicating the type of the content at the time of data communication;
The mobile information communication edge router device according to claim 17, wherein: An IP network, one or more content servers arranged in an arbitrary network area including the IP network, a plurality of access line networks of any type, and the IP network and the plurality of access line networks are connected. Therefore, a plurality of nodes respectively disposed between both networks, and a terminal device capable of performing data communication according to the type of the corresponding plurality of access line networks between the plurality of nodes. A wide area mobile information communication system device constructed and comprising:
The plurality of nodes are respectively
The mobile information communication edge router device according to claim 9, 10, 11, 12, 13, 14, 15, 16, 17 or 18.
A wide area mobile information communication system. Connecting an IP network, a content distribution network connected to the IP network and having a plurality of content servers, a plurality of access line networks of any type, and the IP network and the plurality of access line networks A plurality of nodes respectively disposed between the two networks, and a terminal device capable of performing data communication according to the type of the corresponding plurality of access line networks between the plurality of nodes. A wide area mobile information communication system constructed with
The plurality of nodes are respectively
The mobile information communication edge router device according to claim 9, 10, 11, 12, 13, 14, 15, 16, 17 or 18.
A wide area mobile information communication system.

Images