Login| Sign Up| Help| Contact|

Patent Searching and Data


Title:
METHOD, APPARATUS AND SYSTEM FOR DETERMINING EXISTENCE OF DATA FILE
Document Type and Number:
WIPO Patent Application WO/2016/086789
Kind Code:
A1
Abstract:
A method, apparatus and system for determining existence of a data file. The method comprises: a first network node sending a request to a second network node (S101), wherein a first identifier of a data file is carried in the request; the second network node querying a locally matching data file according to the first identifier of the data file (S102); selecting a file block from the matching data file, and acquiring a first position of the selected file block (S103); sending the first position to the first network node (S104); the first network node selecting a file block of a corresponding position from the data file according to the first position, and calculating a second characteristic value of the selected file block (S105); sending the second characteristic value of the selected file block to the second network node (S106); and the second network node judging whether the second characteristic value matches a third characteristic value of the file block selected from the locally matching data file, and determining whether the data file exists according to a matching result (S107).

Inventors:
WANG HANZHANG (CN)
Application Number:
CN2015/095589
Publication Date:
June 09, 2016
Filing Date:
November 26, 2015
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
ALIBABA GROUP HOLDING LTD (Islands, CN)
WANG HANZHANG (CN)
International Classes:
G06F17/30; H04L29/06
Foreign References:
CN101771687A2010-07-07
CN101719936A2010-06-02
CN103997661A2014-08-20
CN102937903A2013-02-20
US20050240590A12005-10-27
Other References:
See also references of EP 3229149A4
Attorney, Agent or Firm:
CO-HORIZON INTELLECTUAL PROPERTY INC. (100028, CN)
北京国昊天诚知识产权代理有限公司 (100028, CN)
Download PDF: