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A Random Centralized Scheduling Method for Video Blocking in DTN Network

A block and video technology, applied in the field of wireless networks, can solve the problems of not being able to receive blocks, video playback, and understanding effects in time, and achieve the effect of increasing effective communication and improving the delivery rate.

Inactive Publication Date: 2015-12-02
SHAANXI NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, if there are many missing blocks, and limited to the network environment and unable to receive relatively complete and complete blocks in time, it will affect the playback and understanding of the video

Method used

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  • A Random Centralized Scheduling Method for Video Blocking in DTN Network
  • A Random Centralized Scheduling Method for Video Blocking in DTN Network
  • A Random Centralized Scheduling Method for Video Blocking in DTN Network

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Experimental program
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Embodiment Construction

[0029] In a basic implementation such as Figure 1 to Figure 1 1 Provides a random concentration scheduling method for video blocks in a DTN network, which is used to adjust the centralized distribution of video blocks on the time axis. The method includes that two nodes A and B establish a Boolean vector table locally, and the Boolean vector table is used to save the block existence state in the current node, and then the block scheduling is performed between the two nodes A and B. as follows:

[0030] S1: The A node and the B node move in the scenario of a general delay tolerant network;

[0031] S2: Determine whether node A and node B enter the communication range of each other, if so, go to step S3, otherwise return to S1;

[0032] S3: Nodes A and B exchange their Boolean vector tables;

[0033] S4: Calculate whether it is necessary to transmit video blocks to the other party through XOR operation, if yes, go to S5, otherwise, go to S11;

[0034] S5: Node A determines ...

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Abstract

The invention discloses a random centralized scheduling method of video blocks in DTN (Delay Tolerant Networks). The random centralized scheduling method is used for adjusting the video blocks to be concentrated on the time axis and comprises the following steps: performing logical operation on a Boolean vector table in mobile nodes within the communication range, counting data blocks that can be sent, determining the sending priority through calculating a block scarcity degree of the data blocks to be sent, designing a scheduling algorithm, and interfering the block transmission process, so that the distribution of the video blocks in a target node meets the application requirements.

Description

technical field [0001] The invention relates to the field of wireless networks, in particular to a method for adjusting the random centralized distribution of video blocks on a time axis. Background technique [0002] In the real Delay Tolerant Networks (DTN), the movement of nodes is random, and the communication between nodes is opportunistic. For video content with a large amount of data, it is difficult to carry out effective transmission in the harsh DTN network environment with frequent interruptions. The commonly used method is to divide the video data into several data blocks of the same size on the source node. When the block size is appropriate, it can meet the actual situation of short-term opportunity communication. After a certain delay, it is expected to receive all the data at the target node. The data is divided into blocks, and then merged to obtain the same video content as the source node. However, in DTN network communication, the generation and death o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N21/262H04N21/234H04N21/238
Inventor 王小明朱腾蛟李鹏张丹张杨
Owner SHAANXI NORMAL UNIV
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