Relay Node Radio Bearer Mapping for QoS in Wireless Systems
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In wireless communication systems, particularly in 3GPP LTE-Advanced, managing radio bearers between user equipment and relay nodes, as well as between relay nodes and base stations, is complex due to the introduction of relay technology, which requires defining and mapping multiple wireless channels to ensure quality of service (QoS) and efficient data transmission.
Innovation Solution
A method and apparatus for managing radio bearers by setting up and mapping UuRBs between user equipment and relay nodes, and UnRBs between relay nodes and base stations, based on guaranteed QoS, using a radio bearer managing unit and interface units to facilitate efficient data packet transmission with identification information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If relay technology is introduced to expand coverage and support group mobility, then network coverage and mobility support are improved, but the complexity of managing radio bearers increases due to the need to define and map multiple wireless channels
Solution Approach 1:
The patent segments the radio bearer management into two distinct interfaces: Uu interface (between user equipment and relay node) and Un interface (between relay node and base station). This segmentation allows independent management and mapping of radio bearers on each interface, reducing the overall complexity by breaking down the monolithic management task into manageable segments.
Solution Approach 2:
The relay node acts as an intermediary between the user equipment and the base station. It introduces intermediate radio bearers (UuRBs and UnRBs) that mediate the communication, allowing the system to expand coverage and support mobility while managing complexity through this intermediate layer that handles the mapping and coordination.
2Reliability
If multiple wireless channels are defined for Uu interface and Un interface to support relay functionality, then relay functionality and QoS guarantee are improved, but the complexity of mapping and managing these channels increases
Solution Approach 1:
The patent applies local quality by establishing specific mapping relationships between UuRBs and UnRBs based on their individual QoS requirements. Each radio bearer is configured with specific QoS parameters, and the mapping is performed locally at the relay node to ensure that the QoS characteristics are preserved end-to-end, rather than applying a uniform mapping approach.
Solution Approach 2:
The patent changes parameters by introducing QoS parameters as the basis for mapping decisions. The mapping between UuRBs and UnRBs is determined by comparing QoS parameters (such as priority, guaranteed bit rate, maximum bit rate) to ensure that bearers with similar QoS requirements are mapped together, simplifying the mapping complexity through parameter-based classification.
Data Source
AI summary
A method and apparatus of managing a radio bearer is disclosed. A relay node (RN) sets up at least one UuRB for a Uu interface between a user equipment (UE) and the RN and a UnRB for a Un interface between the RN and a base station (BS). The at least one UuRB is mapped to the UnRB according to quality of service (QoS) guaranteed by the at least one UuRB to setup a RB between the UE and the BS.