Relay Node H-RNTI Mapping for Cell Edge Data Transmission
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Solution Overview
Problem
The existing HSDPA technology's 2-ms transmission time interval mode enhances data transmission rate but reduces downlink coverage capability at the cell edge, leading to inefficient data transmission to user equipment at the cell edge.
Innovation Solution
A method and system that utilize a relay node to map and transmit data between a user equipment's H-RNTI and a relay node's H-RNTI, enabling the relay node to forward data to the user equipment, thereby enhancing downlink coverage and transmission efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If 2-ms transmission time interval mode is used, then data transmission rate is improved, but downlink coverage capability at cell edge is reduced
Solution Approach 1:
The patent introduces a relay node as an intermediary between the base station and user equipment at the cell edge. The relay node receives data from the base station and forwards it to the target user equipment, enabling extended coverage while maintaining the benefits of 2-ms TTI transmission mode. This mediator approach allows the system to achieve both high transmission rates and extended coverage capability.
2Loss of time
If short frame transmission is used, then data transmission delay is reduced, but efficiency in transmitting data to user equipment at cell edge is reduced
Solution Approach 1:
The relay node serves as a mediator that enables short frame transmission to reach cell edge users effectively. By introducing this intermediate transmission point, the system maintains the low latency benefits of short frames while extending reach to users at the coverage boundary, thereby improving overall transmission efficiency to cell edge equipment.
Solution Approach 2:
The transmission path is segmented into two stages: base station to relay node, and relay node to user equipment. This segmentation allows the system to apply optimized transmission parameters for each segment, maintaining low delay characteristics while extending coverage to improve overall productivity in transmitting data to cell edge users.
Data Source
AI summary
Embodiments of the present invention provide a method and system for data transmission. The method for data transmission includes: sending, according to a mapping relationship between a first H-RNTI of a user equipment and a second H-RNTI of a relay node accessed by the user equipment, data to the user equipment corresponding to the first H-RNTI by using the relay node corresponding to the second H-RNTI. By using the technical solutions of the embodiments, the coverage capability of a cell edge is enhanced, and the efficiency in transmitting data to a UE at the cell edge is further improved.