Bandwidth Part System Information Update Signaling

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Solution Overview

Problem

Current wireless communication systems face challenges in efficiently updating system information for user equipment (UE) associated with both initial access and configured bandwidth parts, particularly due to the complexity of managing different bandwidth parts and ensuring timely and resource-efficient communication of updated information.

Innovation Solution

The method involves determining updated system information for a UE associated with an initial access bandwidth part (BWP) and a configured BWP, and transmitting this information using unicast signaling, multicast signaling, or a specific BWP different from the configured BWP, allowing for improved spectral efficiency and reduced interference.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If system information is updated using traditional broadcast methods in LTE, then all user equipment can receive the updates, but the spectral efficiency deteriorates and resource overhead increases

Engineering Contradiction:

Improvesystem information update deliveryVSAvoidspectral efficiency

Core Design Contradiction:

ReliabilityVSLoss of energy

Solution Approach 1:

The patent segments the user equipment population into two distinct groups: UEs in initial access BWP and UEs in configured BWP. Different update mechanisms are applied to each segment - unicast signaling for configured BWP UEs and broadcast for initial access BWP UEs. This segmentation resolves the contradiction by allowing targeted, efficient updates for the larger configured BWP group while maintaining comprehensive coverage for initial access UEs.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent implements dynamic BWP switching where UEs can transition between initial access BWP and configured BWP based on their connection state. The system dynamically selects the appropriate update mechanism (unicast or broadcast) based on the UE's current BWP state, optimizing spectral efficiency while ensuring reliable delivery adaptively.

Inventive Principle:

Principle #15Dynamics

2Productivity

If multiple bandwidth parts are managed for different UEs, then service flexibility and spectral efficiency improve, but the complexity of managing system information updates increases

Engineering Contradiction:

Improvespectral efficiencyVSAvoidsystem information management complexity

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The patent applies different quality characteristics to different BWP types: configured BWP uses unicast signaling with UE-specific parameters for optimized spectral efficiency, while initial access BWP uses broadcast signaling for universal coverage. This local differentiation resolves the complexity contradiction by tailoring the update mechanism to the specific requirements of each BWP type rather than using a one-size-fits-all approach.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The patent changes the signaling parameters based on BWP type and UE state. For configured BWP, unicast RRC signaling parameters are used with UE-specific identifiers. For initial access BWP, broadcast parameters are used with generic identifiers. This parameter adaptation simplifies management complexity by providing clear, context-appropriate signaling rules for each scenario.

Inventive Principle:

Principle #35Parameter changes

3Loss of energy

If unicast signaling is used for system information updates, then spectral efficiency improves for configured UEs, but the complexity of implementing multiple update paths increases

Engineering Contradiction:

Improvespectral efficiencyVSAvoidupdate path implementation complexity

Core Design Contradiction:

Loss of energyVSDevice complexity

Solution Approach 1:

The patent performs preliminary configuration during the initial access phase, where the network configures the UE with specific BWP parameters and update mechanisms before the UE enters the configured BWP state. This preliminary setup simplifies subsequent unicast signaling by pre-establishing the update path and parameters, reducing the complexity of implementing multiple update paths during normal operation.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent uses the BWP configuration itself as an intermediary that carries the information needed to determine the appropriate update mechanism. The BWP configuration parameters include indicators that mediate between the UE state and the update path selection, simplifying the implementation complexity by providing a clear mapping from configuration to update mechanism rather than requiring complex real-time decisions.

Inventive Principle:

Principle #24Intermediary (Mediator)

Data Source

PatentUS11515981B2Techniques and apparatuses for providing system information updates in a system using bandwidth parts

Publication Date: 2022.11.29 QUALCOMM INC

AI summary

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a base station may determine updated system information for a user equipment (UE), wherein the UE is associated with an initial access bandwidth part (BWP) and a configured BWP; and transmit the updated system information to the UE using at least one of unicast signaling, multicast signaling, the configured BWP, or a particular BWP that is different from the configured BWP. Numerous other aspects are provided.