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Mobile communication system, mobile communication method, server device, and sending terminal

A technology for mobile communication systems and sending terminals, which is applied in transmission systems, wireless communications, digital transmission systems, etc., and can solve problems such as the lack of research on the mobility control of communication terminals

Inactive Publication Date: 2006-03-08
NTT DOCOMO INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0025] However, on existing IP 2 Among the methods, the mobility control of communication terminals in 1-to-1 type communication has been sufficiently studied, but there is a problem in realizing efficient communication between groups called 1-to-N type or N-to-M type communication Mobility control of communication terminals in multicast communication has not been studied

Method used

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  • Mobile communication system, mobile communication method, server device, and sending terminal
  • Mobile communication system, mobile communication method, server device, and sending terminal
  • Mobile communication system, mobile communication method, server device, and sending terminal

Examples

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no. 2 example

[0219] refer to Figure 27 , a mobile communication system according to a second modified example of the present invention will be described.

[0220] In the above-mentioned first embodiment, the sending terminal and the receiving terminal of the multicast packet are connected to the same IP 2 way of packet forwarding within the network. However, in the actual application of the mobile communication system, it is considered that one of the sending terminal and the receiving terminal of the multicast packet is connected on the IP 2 The way packets are forwarded outside the network.

[0221] The mobile communication system of this modified example aims to realize multicast communication even when the transmitting terminal and the receiving terminal of the multicast packet are connected to different networks.

[0222] In the mobile communication system of this modified example, if Figure 27 As shown, assume that the sending terminal SN exists in the IP 2 way of packet forward...

no. 3 example

[0230] refer to Figure 28 , a mobile communication system according to a third modified example of the present invention will be described. In this modification example, if Figure 28 As shown, imagine that the sending terminal SN is connected to the IP 2 On the packet forwarding network of this method, the receiving terminal MN is connected to another network.

[0231] The operation of the mobile communication system of this modified example becomes and Figure 27 The operation in is almost the reverse operation, and the point that the multicast tree formed in each network is connected at the border router BR remains unchanged.

[0232] However, in the IP 2 When constructing a multicast tree in the packet forwarding network of this method, it is assumed that the server device NCPF and the receiving terminal MN are connected to the border router BR to generate a multicast tree.

[0233] As described above, according to the present invention, it is possible to provide a m...

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Abstract

A server device used in a mobile communication system which transfers a multicast packet sent from a sending terminal to a receiving terminal through a packet transfer network, includes: a multicast tree determination unit configured to determine a multicast tree showing a transfer route of the multicast packet; and an instruction unit configured to instruct a multicast-corresponding router within the packet transfer network to prepare a multicast transfer table used for transferring the multicast packet, in accordance with a determined multicast tree.

Description

technical field [0001] The present invention relates to a mobile communication system and a mobile communication method for forwarding a multicast packet transmitted from a transmitting terminal to a receiving terminal via a packet forwarding network, and to a server device and a transmitting terminal used in such a mobile communication system and mobile communication method. [0002] In particular, the present invention relates to IP-Based IMT network Platform (IP 2 ) system, a mobile communication system and a mobile communication method for realizing multicast communication, and a server device and a transmitting terminal used in such a mobile communication system and mobile communication method. Background technique [0003] Conventionally, efficient one-to-N communication has been supported as a method, and in recent years, the Source Specific Multicast (SSM) method has been extensively studied in the IETF (see, for example, Non-Patent Document 1). [0004] Here, refer...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/56H04L45/16H04B7/26H04W4/06H04W40/34H04W80/04
CPCH04W80/04H04L45/48H04L12/185H04L12/189H04L45/16H04L45/02
Inventor 矶部慎一西村健治冈川隆俊
Owner NTT DOCOMO INC
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