Cache-Enabled CoMP Wireless Transmission Efficiency
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Solution Overview
Problem
In wireless communication systems, CoMP (Cooperative Multi-Point) transmission faces challenges in efficiently transmitting content to user equipment (UE) when the eNB transmits data, particularly due to limitations in caching and backhaul capacity, which affect the quality of service and delay in delivering multimedia content.
Innovation Solution
The method involves using a cache-enabled CoMP system that stores parity bits generated by MDS encoding of media files in eNBs, optimizing cache configuration and beamforming to enhance CoMP performance, and introducing a partial CoMP mode for flexible information sharing, allowing eNBs to selectively perform CoMP or coordinated MIMO based on cache content and user requests.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If CoMP transmission is performed to improve content delivery efficiency, then the quality of service is improved, but the backhaul capacity requirements increase and system complexity increases
Solution Approach 1:
The patent applies preliminary action by pre-storing parity bits of media files in the caches of multiple eNBs before actual content delivery. This allows the system to quickly retrieve and transmit content using cached data during CoMP operations, improving delivery efficiency while reducing real-time backhaul capacity requirements and system complexity
2Productivity
If cache resources are increased to improve content caching capability, then the content delivery efficiency is improved, but the device complexity and cost increase
Solution Approach 1:
The patent extracts only the essential parity bits needed for content reconstruction and stores them in caches, rather than caching entire media files. This significantly reduces cache memory requirements and device complexity while maintaining content delivery efficiency through partial CoMP operations
Solution Approach 2:
The patent creates simplified copies of content data in the form of parity bits that can be stored in cache. These parity bit copies enable efficient content recovery through CoMP operations without requiring full content copies, reducing cache size requirements and device complexity
3Adaptability or versatility
If partial CoMP mode is introduced to improve flexibility, then the adaptability is improved, but the device complexity increases
Solution Approach 1:
The patent implements partial CoMP mode where only some eNBs participate in CoMP transmission while others operate independently or in coordinated MIMO mode. This partial participation approach provides transmission flexibility and adaptability to different channel conditions while limiting the complexity increase to only the participating eNBs
Data Source
AI summary
The present invention relates to a wireless communication system. More specifically, as a method for transmitting data in a wireless communication system performing a CoMP operation by using a cache, a method for transmitting data, according to the present invention, can comprise the steps of: determining a transmission mode among a plurality of transmission modes on the basis of at least one piece of data stored in the cache; determining data to be transmitted in the transmission mode; and transmitting the data according to the determined transmission mode, wherein the transmission mode can comprise: a first mode for coordinately performing data transmission between coordinated base stations; a second mode for coordinately performing scheduling by sharing channel information between the coordinated base stations; and a third mode for combining the first mode and the second mode.