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File sharing method and system for wifi direct multi-hop mobile devices based on network coding

A mobile device and network coding technology, applied in transmission systems, electrical components, etc., can solve problems such as independent data performance, unfavorable data, and easy increase in delay, so as to improve overall performance, improve reliability, and reduce transmission delay. Effect

Active Publication Date: 2021-02-12
NANJING UNIV OF POSTS & TELECOMM
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problem that the currently adopted passive network coding mode is not conducive to the independence of data between each device and the performance of real-time processing data needs to be improved, and at the same time it is easy to increase the time delay caused by the coding of intermediate nodes, providing a A WiFi direct multi-hop mobile device file sharing method based on network coding

Method used

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  • File sharing method and system for wifi direct multi-hop mobile devices based on network coding
  • File sharing method and system for wifi direct multi-hop mobile devices based on network coding
  • File sharing method and system for wifi direct multi-hop mobile devices based on network coding

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Embodiment 1

[0067] A WiFi direct multi-hop mobile device file sharing method based on network coding, the implementation steps are as follows:

[0068] Step 1): The source device chooses to share data and set the number of data slices, and uses network coding to slice and encode the source file to obtain k linearly independent data slices, and generates an NCD at the same time; the source device performs network coding on the data and converts it Wait for questions and answers from other mobile devices for the AP; at the same time, use network coding to perform slice coding on the source file to obtain k linearly independent data slices. The existing technology is not repeated here.

[0069] Step 2): The mobile device sends a question and answer request to the source device, and the source device sends data to the mobile device after accepting the request;

[0070] Step 201): Initially, several mobile devices are in the RM and request to send data packets to the source device;

[0071] S...

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Abstract

The present invention discloses a WiFi direct multi-hop mobile device file sharing method and system based on network coding, wherein the method includes: the source device selects the shared data and performs fragmentation network coding operation on it; the source device waits for questions and answers from other mobile devices ; After successfully receiving the data, the mobile device sends a re-encoded data packet to other mobile devices; after receiving a certain amount of linearly independent data slices, the mobile device can decode to obtain the original data. The present invention utilizes the mode switching strategy, which can save the delay caused by the non-stop switching of devices, thereby improving the data distribution efficiency in the system; by using the active recoding strategy of the intermediate node, the independence of the data packet is enhanced, and the idle time is used to The system delay is reduced, so that the overall performance of the system is improved; the present invention has the advantages of stable data transmission and high data sharing rate.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, and in particular relates to a WiFi direct multi-hop mobile device file sharing method and system based on network coding. Background technique [0002] File sharing system is a typical application of file sharing technology on the Internet. The development of mobile devices makes such applications have broad development prospects. Nowadays, file sharing system based on mobile devices is a very popular application. However, when transferring files in a commercial 4G network, especially when there are many receiving ends, the communication fee will be very high, and the file owner will bear the high communication fee. When WiFi direct technology is adopted, users in the same area can save communication costs; in addition, users can obtain a higher sharing rate than commercial networks. Currently, WiFi direct is the ideal way for mobile device transmission and is widely supported ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L29/08H04L29/06
CPCH04L67/06H04L65/765
Inventor 陈鑫王磊孙中伟刘郁徐力杰刘峥徐佳徐小龙王俊昌
Owner NANJING UNIV OF POSTS & TELECOMM
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