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IP multicast delivery apparatus, content delivery system, and ip multicast delivery method being employed therefor

An IP multicast and transmission device technology, applied in the field of content transmission using IP multicast, can solve problems such as suppression, prerequisite devices notifying upstream network failures, and content cannot be reproduced correctly

Inactive Publication Date: 2008-09-24
NEC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Even in the case where the packet from the transfer server does not arrive although the premise device receiving the determined content exists, the aforementioned relay device cannot notify the effect that the upstream network or the transfer server has failed for the premise device in which the aforementioned relay device is just a means to properly copy / deliver packets from delivery servers
[0009] In addition, as shown in FIG. 8, the emergency notification broadcast is transmitted as a packet to the aforementioned relay devices of the premise devices (#1 to #3) 5a to 5c in parallel with the multicast group established in a fixed manner when a failure occurs , causing such a problem that two traffics (multicast packet and emergency notification packet) of the multicast group arrive at each premise device (#1 to #3) 5a to 5c at the same time, and therefore because the emergency notification packet is different from the current Packets received by the premise device are transmitted at the same time, and the content cannot be reproduced correctly
[0010] Also, in such a case, the aforementioned relay device causes a problem that since packets for emergency notification and multicast packets corresponding to currently received contents are delivered to the network on the premise device side, the designed The network band of the network is exceeded, and the bands of other packets are suppressed
[0014] (3) In the case of a failure of the delivery server or the network on the side of the delivery server, the failure of the upstream network cannot be notified to the premise device

Method used

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  • IP multicast delivery apparatus, content delivery system, and ip multicast delivery method being employed therefor
  • IP multicast delivery apparatus, content delivery system, and ip multicast delivery method being employed therefor
  • IP multicast delivery apparatus, content delivery system, and ip multicast delivery method being employed therefor

Examples

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example 1

[0057] Fig. 4 is a block diagram showing the configuration of a content delivery system according to an illustrative example of the present invention. In FIG. 4, the IP multicast transmission device 1 has a master table 11a of multicast traffic. In addition, this IP multicast delivery device 1 has network interfaces each having at least two ports, and some of the interfaces connected to the relay network 100 and connected to the network (CDN) installed in the multicast delivery servers 3a and 3b ) some of the remaining interfaces of 110a and 110b.

[0058] At this time, the mask table 11a has multicast group addresses for emergency notifications ("Notification A", "Notification B", "Notification C", "Notification D" and "Notification E") on the vertical axis side and the In the direction of the horizontal axis there are addresses ("McastL", "McastM", "McastN", "McastO", "McastP " and "McastQ").

[0059] In the mask table 11a, in the case of a multicast group masked by the e...

example 2

[0070] Fig. 6 is a view showing an outline of an operation of a packet in an IP multicast delivery device according to another exemplary example of the present invention. In FIG. 6, an IP multicast transmission device equipped with a packet framer (packetframer) according to another exemplary embodiment of the present invention adopts the same method as that shown in FIG. The configuration of the IP multicast transmission apparatus 1 of an exemplary example of the invention is identical in configuration, and the same codes are attached to the same elements.

[0071] In the masking table 11b, the multicast addresses for normal multicast traffic ("McastL", "McastM", "McastN", "McastO" and "McastP") and the multicast addresses for broadcast accidents (" 4M broadcast accident", "6M broadcast accident", "10M broadcast accident") are respectively arranged in the vertical axis and the horizontal axis, and set so that the corresponding broadcast accident traffic is shielded based on t...

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Abstract

The present invention is an IP multicast delivery apparatus for relaying the content, which is delivered from the multicast delivery server with the IP (Internet Protocol) multicast, to the premise apparatus, comprising: managing unit for managing a dependence relation of the content between the multicast groups; and controller for stopping / restarting of transfer of a multicast group based on the dependence relation that is managed by said managing unit.

Description

[0001] incorporated by reference [0002] This application is based on and claims the benefit of priority from Japanese Patent Application No. 2007048272 filed on February 28, 2007, the disclosure of which is hereby incorporated by reference in its entirety. technical field [0003] The present invention relates to an IP multicast delivery device, a content delivery system, and an IP multicast delivery method used therefor, and particularly relates to content delivery using IP (Internet Protocol) multicast. Background technique [0004] A typical configuration for content delivery using IP multicast is shown in FIG. 7 . In FIG. 7, the network of IP multicast is composed of the following: premise apparatus (premise apparatus) (#1 to #3) 5a to 5c, each of which is installed in the customer's premises; A multicast delivery server 6a (hereinafter referred to as a delivery server) in a CDN (Content Delivery Network (ContentDelivery Network)) 210a for storing content such as vide...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/18H04L12/56H04L47/32
CPCH04L12/1881
Inventor 木村祯夫佐藤壮
Owner NEC CORP