Base Station Centralized Scheduling for Relay Transmission Delay
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Solution Overview
Problem
Existing relay transmission solutions in mobile communication systems face processing complexity and delays, particularly in air interface information processing, which exceeds the 1 ms requirement for user plane processing delay in next-generation mobile communication systems.
Innovation Solution
A centralized scheduling method for a base station to determine transmission paths and perform unified encapsulation using a user plane protocol stack formed only by the physical layer, simplifying processing by forwarding nodes and reducing delays.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If relay stations perform air interface information processing in existing relay transmission solutions, then data can be transmitted through multi-hop relay, but processing delays exceed the 1 ms requirement for user plane processing
Solution Approach 1:
The patent segments the protocol stack into two parts: a simplified PHY-layer protocol for relay-to-relay transmission and a complete air interface protocol for terminal communication. This segmentation allows relay stations to forward data using only the simplified protocol without performing complex air interface processing, thereby reducing processing delay while maintaining data transmission capability
Solution Approach 2:
The patent introduces a simplified PHY-layer protocol as an intermediary mechanism for data forwarding between relay stations. This intermediary protocol enables efficient data transmission through the relay network without requiring full air interface processing at each relay node, thus achieving the 1 ms processing delay requirement
2Reliability
If relay stations perform complex air interface information processing, then complete protocol functionality is achieved, but processing complexity increases
Solution Approach 1:
The patent divides the protocol requirements into two segments: relay stations use only the simplified PHY-layer protocol for forwarding, while complete protocol functionality is maintained only at the donor base station and terminal devices. This segmentation reduces processing complexity at relay stations while preserving necessary protocol functionality through the simplified forwarding mechanism
Solution Approach 2:
The patent applies different protocol complexities to different network elements based on their functional requirements. Relay stations use the simplified PHY-layer protocol appropriate for their forwarding role, while donor base stations and terminals use the complete air interface protocol, optimizing the balance between functionality and complexity for each component
Data Source
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AI summary
The present invention relates to a data transmission method and a base station, where the method includes: determining, by a base station according to channel state information CSI, a transmission path to be passed through for forwarding first data to a first terminal, where if the base station determines that the first data needs to be forwarded by at least one small cell to the first terminal, the transmission path includes a path from the base station to a small cell and a path from the small cell to the first terminal; and sending, by the base station according to the transmission path, a first data frame to the first terminal via the at least one small cell, where the first data frame includes resource assignment information and the first data, and the resource assignment information includes resource assignment information from the base station to the small cell and resource assignment information from the small cell to the first terminal. In the present invention, a macro base station performs centralized scheduling, and performs unified encapsulation according to a scheduled transmission path, thereby effectively simplifying processing by a forwarding node and reducing a delay.