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Route device and communication network system

A communication network and router technology, applied in the field of routers and a communication network system, can solve the problems that the local agent HA does not provide services, does not make resource reservations, and does not provide quality of service services, etc.

Inactive Publication Date: 2003-03-26
FUJITSU LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0072] The first question to ask when following RSVP for resource appointments is: When the packet is encapsulated and transmitted in (A)-(D) above, the path message sent when resource reservation is performed in accordance with RSVP is also encapsulated
[0091] In this case, no resource reservation is made in router R2, so that the requested quality of service is not provided
In addition, although router R1, which pre-reserved resources, provides services, there is a problem: since the destination of encapsulation transmission in home agent HA is the care-of address of mobile node MN, not the home address of mobile node (which is the resource address at the time of appointment), so the home agent HA does not provide services

Method used

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  • Route device and communication network system
  • Route device and communication network system
  • Route device and communication network system

Examples

Experimental program
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application example 1

[0217] For this application example [1], an application example of general Mobile IP (Embodiment (1)), an application example of Hierarchical Mobile IP (Embodiment (2)) and an application of Mobile IP using edge nodes will be described Example (embodiment (3)).

[0218] First, the general processing flow of the router in the embodiments (1)-(3) will be described with reference to FIGS. 2A and 2B. FIG. 2A shows the entire processing flow of the packet receiver 100 shown in FIG. 1 , and FIG. 2B shows the proxy RSVP processing flow of the proxy RSVP processor 50 .

[0219] Next, the processing flow for judging the resource reservation state between the home agent HA and the mobile node MN and the procedure for sending a message to route (without resource reservation in this route) will be described with reference to FIGS. 1, 2A and 2B. The processing flow of resource reservation.

[0220] In the packet receiver 100 of the home agent HA, when a packet is received (step S101 in F...

Embodiment (1

[0230] In the embodiment (1), an application example of general Mobile IP will be described. Since three types of resource reservations (Nos. 1-3) can be made according to the mobility state of the mobile node MN, each type will be described.

[0231] Resource reservation (No.1) in embodiment (1): Fig. 3, 4A and 4B

[0232] 3, 4A and 4B show a resource reservation procedure of resource reservation (No. 1) in embodiment (1) of the present invention in the case where the mobile node MN is located on the external link FL1.

[0233] The setting of the communication network NW in FIG. 3 is the same as that shown in FIG. 31 except that the home agent HA shown in FIG. 3 has a setting shown in FIG. 1, and performs the processing shown in FIGS. 2A and 2B.

[0234] In addition, the route messages PM1-PM3 and reservation messages RM1-RM3 for resource reservation shown in FIG. 3 are the same as the conventional resource reservation procedure shown in FIG. 31 .

[0235] However, in FIG...

Embodiment (2

[0277] An application example of hierarchical mobile IP will be described in embodiment (2). When applying the present invention in hierarchical Mobile IP, except in the binding cache table 21 of the home agent HA in the embodiment (2), the home address of the mobile node MN and the virtual care-of address (VcoA) under the mobile agent MA ) are interrelated, the settings and processing flow of the home agent HA are the same as those in Figures 1, 2A and 2B.

[0278] In addition, as for the mobile agent MA, its setting can be the same as that shown in Figure 1, meanwhile, in addition to the care-of address (PCoA), VcoA is also associated with the home address of the mobile node MN in the binding cache 21 of the mobile agent MA .

[0279] Meanwhile, as described later, the processing flow of the mobile agent MA shown in FIGS. 8A and 8B is different from that of the home agent HA shown in FIGS. 2A and 2B.

[0280] FIG. 8A shows a complete processing flow same as that shown in F...

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Abstract

In a router and a communication network system reserving network resources in compliance with an RSVP (Resource ReSerVation Protocol), that is a protocol for resource reservation, a router stores an encapsulated destination address associated with an address of a second host upon encapsulating and transferring a packet addressed to the second host, transfers a first path message transmitted from a first host to make a resource reservation in compliance with a resource reservation protocol, obtains thereafter the encapsulated destination address from the address of the second host, and transmits a second path message in a non-capsulated state to make a resource reservation with the same communication quality as that of the first path message to the encapsulated destination address.

Description

technical field [0001] The present invention relates to a router and a communication network system, in particular to a router and a communication network system following RSVP (Resource Reservation Protocol), wherein RSVP is a protocol for resource reservation. Background technique [0002] Application example of RSVP [0003] In the RSVP, each router that transfers packets between a first host and a second host makes a reservation (resource reservation) for the quality of service (QoS) offered. [0004] FIG. 24 shows an example of general resource reservation according to the RSVP. In this example, the communication network system NW includes routers R1-R3 and home agent HA, and the first host CN is connected to router R1. It is worth noting that the home agent HA is also a router. [0005] In addition, the mobile node MN is a terminal with an address used in the home link HL, and besides the home link HL managed by the home agent HA, the node can also move to the exter...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L47/724H04W8/26H04W28/26H04W40/34H04W80/04H04W88/14
CPCH04L12/5695H04L47/724H04L47/825H04L47/824H04W40/02H04L47/70Y02D30/70
Inventor 小野英明冈和之
Owner FUJITSU LTD