A Method of Network Coding and Wireless Relay Collaboration in Edge Cache

Abstract

The invention provides a coordination method of network coding and wireless relay in an edge cache. After receiving the requirements of an edge device, a core network correspondingly generates a future use file that needs to be cached, and in addition, the core network has a normal file for normal communication at this time. The core network transmits the normal file to a macro base station and arelay base station, and transmits the future use file to the macro base station, the macro base station performs xor wireless network coding on the normal file and the future use file, and then transmits the normal file and the future use file to the relay base station, and the relay base station can perform decoding to obtain the normal file and the future use file, caches the future use file inan MEC server for future file access and applies the normal file for a diversity gain or a retransmission request. By adoption of the coordination method provided by the invention, the contents needing to be cached in advance of the MEC can be cached in the edge relay base station while ensuring the transmission of the normal communication contents, the MEC transmission resource problem is solved,and meanwhile the diversity gain and the retransmission request of the normal communication contents can be satisfied to a certain extent, so that the coordination method is an effective applicationscheme with feasibility, practicality and innovativeness.

Description

technical field [0001] It involves the field of wireless communication technology, the relay base stations that are quite commonly used in mobile cellular networks today, and the network coding technology that has only been researched since the beginning of the 21st century. It also involves the latest popular technology MEC (Mobile Edge Caching, hereinafter referred to as MEC or edge cache). Background technique [0002] In the cellular network, "relay" specifically refers to a wireless relay station (Relay Station), also known as a repeater, which is a two-way radio frequency, same frequency, broadband linear amplification relay device. The relay cellular network is the product of the integration of relay technology, multi-hop structure and traditional cellular network. Cellular network relays are widely used in today's cellular networks because their functions are close to those of macro base stations, but their cost is lower than that of macro base stations, and they ar...

AI Technical Summary

Problems solved by technology

[0014] The present invention proposes a scheme of applying network coding and wireless relay cooperation to edge caching, so as to solve the transmission resource coordination problem that will affect normal real-time communication when caching peripheral potential demand files in advance

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