Dual Connectivity Uplink Data Transmission via RLC MAC Segmentation
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently transmitting uplink data in dual connectivity scenarios, particularly in managing radio bearers and channel conditions between multiple base stations, which affects data transmission reliability and efficiency.
Innovation Solution
The method involves configuring a radio bearer with multiple Radio Link Controls (RLCs) and Medium Access Controls (MACs) in user equipment (UE) to selectively transmit uplink data to one of two base stations based on channel conditions and indications, allowing for efficient data transmission by optimizing the use of radio resources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a radio bearer is configured with multiple RLCs and MACs for dual connectivity, then data transmission reliability is improved, but device complexity increases
Solution Approach 1:
The patent segments the radio bearer into multiple independent RLC entities (first RLC and second RLC) and multiple MAC entities (first MAC and second MAC), each handling data transmission to different base stations. This segmentation allows parallel transmission paths while keeping each entity relatively simple, resolving the contradiction between reliability and complexity.
Solution Approach 2:
The patent implements dynamic selection of transmission paths by configuring indications that specify which base station (first or second) should receive data through which RLC/MAC pair. This dynamic adaptability allows the system to optimize for reliability when needed while maintaining operational simplicity through standardized procedures, balancing the contradiction between reliability and device complexity.
2Productivity
If the UE transmits uplink data to both base stations simultaneously, then data transmission efficiency is improved, but loss of time increases due to managing multiple transmission paths
Solution Approach 1:
The patent applies preliminary action by pre-configuring the radio bearer with multiple RLC and MAC entities before data transmission begins. The indication of which base station receives data through which path is established in advance, eliminating the need for real-time decision-making and path management during actual data transmission, thus improving efficiency while minimizing time loss.
3Reliability
If the UE selects the best base station based on channel conditions, then data transmission reliability is improved, but the complexity of detecting and measuring channel conditions increases
Solution Approach 1:
The patent implements feedback mechanisms where the UE measures channel conditions and receives indications from the network about which base station should receive data through which configured RLC/MAC path. This feedback-based approach simplifies the UE's measurement burden by allowing network-guided selection while still achieving reliable transmission through optimal path selection.
Data Source
AI summary
The present invention relates to a wireless communication system. More specifically, the present invention relates to a method and a device for transmitting uplink data in the wireless communication system, the method comprising: configuring a radio bearer comprising a first and a second Radio Link Controls (RLCs) and a first and a second Medium Access Controls (MACs) of the UE, wherein the first RLC and the first MAC are used to transmit data to the first BS, and the second RLC and the second MAC are used to transmit data to the second BS; receiving an indication for the radio bearer, wherein the indication indicates to which of the first BS and the second BS the radio bearer is to transmit data; and transmitting uplink (UL) data of the radio bearer to the first BS using the first RLC and the first MAC if the indication indicates the radio bearer transmits data to the first BS.