D2D cache communication content sharing method

Abstract

The invention provides a D2D cache communication content sharing method. The method comprises the following steps: filtering a candidate D2D file transmitter according to file information requested bya D2D user terminal file requester; calculating an existing energy estimated value of the candidate D2D file transmitter and selecting a final D2D file transmitter based on the obtained existing energy estimated value. The method in the invention considers an existing energy factor of the D2D user device during file transmission and improves the file transmission success rate and cache communication throughput.

Description

technical field [0001] The present invention relates to the technical field of communication, in particular to a D2D cache communication content sharing method. Background technique [0002] D2D cache communication technology refers to a technology that enables nearby devices in a short distance to share local cache data in a direct communication manner by exploring the cache capability of mobile user terminal equipment in a cellular network. In the D2D cache communication technology, once the D2D communication link is established, the D2D terminal device can obtain the content without the intervention of the access base station or the intermediate device, and obtain the requested content in a D2D communication mode with high transmission rate and low delay. [0003] With the rapid increase of global mobile data traffic, mobile video traffic accounts for 50% of mobile data traffic, and the hardware storage cost of smart terminal devices continues to decrease, so the local st...

AI Technical Summary

Problems solved by technology

[0007] Third, adopt the D2D user terminal clustering scheme: the first two types of schemes are based on the traditional network data on-demand transmission mode, that is, all D2D user requesters in the network system search for D2D user providers with corresponding content in the entire network of the community, Then data transmission is carried out at the same time. In this on-demand transmission mode, there will be signals of the same type superimposed on each other (such as uplink data, downlink data, etc.), resulting in interference

However, in the actual cache communication application scenario, the battery capacity of the user terminal device is limited. When the power of the device is less than a certain value, it is not enough to support the energy consumption of the user device during the file sharing process, resulting in the failure of file sharing and the failure of D2D cache communication. Throughput drops, etc.

In short, none of the existing solutions can significantly improve the unloading rate of cellular network traffic and network communication capacity in scenarios where device energy is limited

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