File repair system and method

Abstract

The invention relates to a file recovery system. The system comprises a BM-SC and a via network element, wherein, the system is also provided with a file recovery node which is connected with the via network element which controls the file recovery node, and the file recovery node is used for storing corresponding data block in dialog information forwarded by the via network element for realizing file recovery; the via network element which controls the file recovery node also comprises a calculation module which is used for calculating the usable resource information of the file recovery nodes and a report module which is connected with the calculation module and used for reporting the status information of the file recovery node to the BM-SC; the BM-SC also comprises a distribution module which is used for generating the list of the file recovery node. The invention also relates to a file recovery method which comprises the steps of distributing dialog information and the file recovery node list by the BM-SC, storing the corresponding data block by the file recovery node and requesting file recovery from a terminal. The file recovery system reduces communication traffic when data is distributed and downloaded to the file recovery node and avoids the overload of the file recovery node.

Description

Technical field [0001] The invention relates to a file repairing system and method, in particular to a file repairing system and a file repairing method based on a multimedia multicast service in the field of mobile communication. Background technique [0002] Multimedia Broadcast / Multicast Service (MBMS) can enable the network to provide a large number of users with the same high-rate multimedia data service at the same time through multicast, thereby greatly saving network resources. MBMS uses the File Delivery over Unidirectional Transport (FLUTE) protocol to carry download data, but the Forward Error Correction (FEC) it uses cannot guarantee 100% reliability. Therefore, the file repair process is necessary for using MBMS to transfer download data. [0003] MBMS file repair methods are divided into two types: point-to-point (PTP) and point-to-multipoint (PTM). The point-to-multipoint repair method cannot achieve reliable transmission. The existing point-to-point repair system ...

AI Technical Summary

Problems solved by technology

If the file repair server in the prior art adopts centralized management, the congestion of the uplink and downlink channels cannot be alleviated; if decentralized management is adopted, in addition to distributing downloaded data to the file repair server itself will bring transmission volume, how to effectively distribute these server, has reached a reduction in the amount of transfers when repairing is also an issue

[0005] In terms of file content storage, the file repair server in the prior art needs to store complete transmission content. When repair requests are frequent, the data will be repeatedly transferred to memory, greatly increasing the possibility of overloading the file repair server

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