Relay Node Bearer Mapping via QoS Class Identifiers

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Solution Overview

Problem

Managing radio bearers in wireless communication systems with relays is complex, particularly in mapping Uu bearers to Un data radio bearers and handling base station signaling messages, which requires technical specification changes and efficient QoS management.

Innovation Solution

Implementing a method to map one or more Uu radio bearers to a single Un radio bearer based on QoS class identifiers (QCI) for efficient communication, enabling the relay node to operate as a base station and supporting various wireless communication networks like LTE, CDMA, and OFDMA.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If one-to-one mapping between Uu bearers and Un data radio bearers is implemented, then QoS management is simplified, but device complexity and bearer handling overhead increase significantly

Engineering Contradiction:

ImproveQoS managementVSAvoidbearer handling complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent merges multiple Uu bearers (with different QCI values) into a single Un data radio bearer by mapping them based on QoS parameters. Instead of maintaining separate one-to-one mappings, multiple bearers are combined and mapped to shared Un bearers, reducing the overall number of bearers and simplifying management while preserving QoS differentiation through parameter-based mapping rules.

Inventive Principle:

Principle #5Merging (Combining)

2Reliability

If multiple Un data radio bearers are established to maintain QoS for each Uu bearer, then QoS is preserved, but the number of bearers increases and management complexity increases

Engineering Contradiction:

ImproveQoS preservationVSAvoidnumber of bearers

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent makes Un data radio bearers universal by enabling them to carry multiple Uu bearers simultaneously. A single Un bearer is designed to handle multiple QCI types (e.g., QCI 1, 2, 5, 6, 9) through configurable mapping rules, allowing one bearer to perform multiple QoS functions rather than requiring dedicated bearers for each QCI type.

Inventive Principle:

Principle #6Universality (Multi-functionality)

3Reliability

If technical specification changes are made to support relay QoS management, then QoS support is improved, but implementation difficulty and standardization complexity increase

Engineering Contradiction:

ImproveQoS supportVSAvoidimplementation difficulty

Core Design Contradiction:

ReliabilityVSEase of manufacture

Solution Approach 1:

The patent implements QoS management through parameter-based mapping rules rather than structural specification changes. By using QCI values and QoS parameters as mapping criteria, the system achieves flexible QoS support through configurable parameters that can be adjusted without fundamental changes to the technical specifications or architecture.

Inventive Principle:

Principle #35Parameter changes

Data Source

PatentEP2550835B1Data radio bearer mapping in a telecommunication network with relays

Publication Date: 2019.09.25 QUALCOMM INC

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AI summary

Certain aspects of the present disclosure relate to techniques for operating a relay having a first plurality of radio bearers (RBs) that interface with a donor base station and having a second plurality of RBs that interface with at least one user equipment (UE). According to certain aspects, the techniques generally include mapping each of the second plurality of RBs to one of the first plurality of RBs based on a QoS class identifier (QCI) associated therewith.