Central Processing Node Bypass for CoMP Data Transmission
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Solution Overview
Problem
Coordinated multipoint transmission/reception (CoMP) in wireless networks faces a transmission bottleneck in cloud radio access networks and hybrid layer 1 architectures due to congested interfaces between central processing nodes and gateways, affecting data transmission efficiency.
Innovation Solution
A data transmission method where the central processing node sends a bearer switching request message to bypass itself when congestion is detected, allowing data to be transmitted directly between gateways and base stations, reducing traffic and alleviating congestion by rerouting data through non-S1 interfaces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If all user data is aggregated to one central processing node for processing, then coordinated scheduling and joint coding/decoding can be performed to improve interference characteristics and transmission efficiency, but a transmission bottleneck occurs at the interface between the central processing node and gateway
Solution Approach 1:
The patent segments the data transmission path by dividing user data into CoMP data and non-CoMP data. Non-CoMP data is routed directly between base stations and gateways without passing through the central processing node, while only CoMP data flows through the central processing node. This segmentation reduces the traffic load on the central processing node interface and eliminates the transmission bottleneck while preserving coordinated scheduling and joint processing capabilities for CoMP data.
2Quantity of substance
If data transmission amount between central processing node and gateway is reduced by compression, then transmission bottleneck is alleviated, but system complexity increases
Solution Approach 1:
The patent extracts non-CoMP data from the overall user data stream and routes it through a separate direct path between base stations and gateways. This extraction eliminates the need for compression techniques and reduces system complexity while effectively reducing the data transmission amount through the central processing node interface. Only the necessary CoMP data continues to flow through the central processing node.
Data Source
AI summary
The present disclosure provide a data transmission method, including: receiving, by a central processing node, downlink user data from a first gateway GW; sending, by the central processing node, the downlink user data to a corresponding base station; and when it is determined that an interface between the central processing node and the first GW is congested, sending, by the central processing node, a first bearer switching request message to the first GW, where the first bearer switching request message is used to instruct the first GW to bypass the central processing node when transmitting data. In the embodiments of the present invention, when determining that an interface between a central processing node and a first GW is congested, the central processing node sends a first bearer switching request message to the first GW, so that the first GW transmits downlink user data with the central processing node bypassed.