Segmented Data Transfers in CoMP Wireless Networks
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Solution Overview
Problem
Coordinated Multi-Point (CoMP) wireless communication systems face challenges in efficiently transferring large data files due to high backhaul latency and bandwidth requirements, particularly in Joint Processing (JP) methods, which can lead to significant cost constraints and latency issues during file uploads.
Innovation Solution
The method involves breaking down data files into smaller pieces and transferring them through a CoMP set of cooperating nodes, where each piece is sent independently with acknowledgement messages, allowing for retransmission of missing pieces and reducing the reliance on high-capacity backhaul connections by enabling nodes to forward pieces directly to the destination node.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If Joint Processing (JP) methods are used in CoMP systems, then data transfer capability is improved, but backhaul latency and bandwidth requirements increase significantly
Solution Approach 1:
The patent segments large data files into smaller pieces before transmission through the CoMP network. Each piece can be independently transmitted through different base stations in the CoMP set, reducing the amount of data that needs to be exchanged over backhaul links and thereby reducing overall latency while maintaining high throughput capability
2Productivity
If Joint Processing (JP) methods are used in CoMP systems, then data transfer capability is improved, but backhaul bandwidth requirements increase to 10s or 100s of Gbps
Solution Approach 1:
By dividing files into smaller pieces, the patent reduces the peak bandwidth requirements on backhaul links. Multiple smaller transmissions can be distributed across different time slots and base stations, avoiding the need for extremely high capacity backhaul connections that would be required for monolithic file transfers
Solution Approach 2:
The patent transmits only the necessary portions of data (individual pieces) rather than requiring complete data sets to be available at all nodes simultaneously. This partial action approach reduces the total bandwidth consumption on backhaul links compared to full JP implementations
3Loss of information
If centralized CoMP coordination is used, then complete knowledge of CoMP signals is achieved, but implementation cost increases due to high capacity backhaul interconnects
Solution Approach 1:
The patent segments both the data transmission and the coordination function. Different base stations in the CoMP set can independently handle different pieces of data, reducing the need for centralized coordination of entire data sets. This segmentation allows for more cost-effective distributed implementation while maintaining signal knowledge where needed
Data Source
AI summary
Various methods, devices and nodes in a wireless system are disclosed for efficiently transferring files (both uploads and downloads) between a wireless device and a network node in a Coordinated Multipoint (CoMP) environment. According to a broad aspect, an upload request message is sent from the wireless device to the cooperating nodes in the CoMP set for uploading the data file to the network node, and based on an upload grant from at least one cooperating node, a plurality of piece messages are sent to the cooperating nodes for transmission to the network node, each piece message containing a particular piece of the data file. In yet another broad aspect, both a coordinating node and non-coordinating nodes in the CoMP set are configured to receive piece messages. Non-coordinating nodes that receive piece messages send acknowledgement messages to the coordinating node indicating which pieces have been received. If at least one piece has not been received at the coordinating node but received at a non-coordinating node, the coordinating node instructs the non-coordinating node to forward the at least one piece received to the network node.