User mobility supporting method distinguishing content in content centric networking (CCN)

Abstract

The invention provides a user mobility supporting method distinguishing content in a content centric networking (CCN). The method comprises the steps of determining a type of content requested by a user; and according to a determining result of the content type, executing a user mobility supporting process corresponding to the content type. According to the method, an original access router cachesa data message sent to an original position of the user, so as to prevent data message loss caused by user mobility switch; content that is not obtained in the user mobility switch is cached proactively, so that mobility switch delay caused by user mobility switch is shortened effectively; independent user mobility supporting processes are combined according to the content type, so that the usermobility supporting method is more flexible and reliable; the adverse effect of user mobility switch on a non-real time service is lowered; and the method extends multiple protocols and applications supporting traditional internet and can be widely used.

Description

technical field [0001] The invention relates to the field of network technology, in particular to a user mobility support method for distinguishing content in a CCN network. Background technique [0002] CCN (Content Centric Networking, referred to as content-centric network) network has many advantages such as high resource utilization rate, low network energy consumption and good dynamic performance, and has now developed into one of the most recognized and potential network architectures in the field of future Internet research. . However, as a new network architecture, the CCN network still has relatively serious user mobility problems, which are manifested in the following three aspects: [0003] First, the mobile switching of the user will result in the loss of data messages sent to the original location of the user. The original access router of the user cannot know the current mobility status of the user. Therefore, after the user moves and switches, the access rou...

AI Technical Summary

Problems solved by technology

[0003] First, the user's mobile switching will result in the loss of data messages sent to the user's original location

The user's original access router cannot know the current mobility status of the user. Therefore, after the user moves and switches, the access router will still forward the data message sent to the user's original location according to the matching entry in the pending interest table, which inevitably leads to the loss of part of the data message

[0004] Second, users cannot effectively use the content shared by the CCN network after mobile switching

It takes a certain amount of time to update the forwarding information database of each node in the network. Therefore, the user's new access router may not be able to forward the user's interest message to the adjacent node that has cached the requested content, and the user cannot obtain the content cached by the adjacent node. , will cause a serious waste of network bandwidth resources

[0005] Third, the user's mobile handover will introduce a long mobile handover delay

First, the user needs to retransmit the interest message to request the content that he could not obtain during the mobile handover process. Secondly, the user cannot effectively use the cache resources of the adjacent nodes, so the interest message retransmitted by the user may not be satisfied in a short time , will have a greater impact on delay-sensitive real-time services such as video conferencing and VoIP

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