Feature-Specific System Information Requests for Wireless UE Power Saving

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Solution Overview

Problem

Existing wireless communication systems transmit entire system information blocks (SIBs) to user equipment (UE), which may include irrelevant information, leading to unnecessary power consumption at both the anchor cell and the UE.

Innovation Solution

Implementing feature-specific on-demand system information by allowing UEs to request and receive only the relevant portions of SIBs based on their specific features, utilizing a distributed unit (DU) and central unit (CU) to manage and transmit targeted SI.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the anchor cell transmits the entire SIB to the UE, then the UE receives complete system information, but both the anchor cell and UE consume unnecessary power due to transmitting and receiving irrelevant information

Engineering Contradiction:

Improvecompleteness of system information receptionVSAvoidpower consumption at UE

Core Design Contradiction:

ReliabilityVSUse of energy by moving object

Solution Approach 1:

The SIB is segmented into multiple portions, where each portion corresponds to specific UE features. The UE receives only the relevant portions based on its feature set, rather than the entire SIB. This segmentation resolves the contradiction by maintaining reliable information delivery for needed features while eliminating power waste from receiving irrelevant information.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Different portions of the SIB are tailored to different UE feature types, providing locally optimized information quality. Each UE receives system information with the appropriate level of detail and relevance for its specific features, rather than a uniform one-size-fits-all approach. This ensures reliability for each UE's specific needs while reducing overall power consumption.

Inventive Principle:

Principle #3Local quality

2Reliability

Engineering Contradiction:

Improvecompleteness of system information receptionVSAvoidpower consumption at anchor cell

Core Design Contradiction:

ReliabilityVSUse of energy by stationary object

Solution Approach 1:

The SIB transmission is segmented into multiple portions corresponding to different UE features. The anchor cell transmits only the relevant portions based on the UE's feature indication, rather than the entire SIB. This reduces the transmission energy consumption at the anchor cell while maintaining reliable delivery of necessary information.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Instead of transmitting the complete SIB (excessive action), the system transmits only the necessary portions (partial action) relevant to the UE's features. This partial transmission approach maintains sufficient reliability for the UE's specific needs while significantly reducing the energy consumption at the anchor cell.

Inventive Principle:

Principle #16Partial or excessive action

3Adaptability or versatility

If the SIB includes information for multiple UE features, then all UE types can access relevant information, but UEs with specific features receive irrelevant information increasing processing overhead

Engineering Contradiction:

Improvecompatibility across multiple UE typesVSAvoidprocessing overhead at UE

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The SIB is divided into multiple portions, each associated with specific UE features. The UE receives only the portions relevant to its feature set, reducing processing overhead. This segmentation maintains adaptability because each UE type receives the appropriate information portions while reducing the complexity of processing irrelevant data.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Each portion of the SIB is optimized for specific UE feature types, providing locally adapted information quality. UEs process only the relevant portions matching their features, reducing processing overhead while maintaining versatility across different UE types through feature-specific information delivery.

Inventive Principle:

Principle #3Local quality

4Reliability

If the UE requests multiple types of SI associated with different UE features, then the UE obtains comprehensive feature-specific information, but the signaling overhead and transmission complexity increase

Engineering Contradiction:

Improvecompleteness of feature-specific SI receptionVSAvoidtransmission management complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

Multiple SI requests associated with different UE features are merged into a single aggregated request transmitted by the UE. The network node processes this combined request and delivers all relevant SI portions in one transmission. This merging maintains complete feature-specific information delivery while reducing signaling overhead and transmission management complexity.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The SI request mechanism is designed to handle multiple feature types universally through a single request structure. The network node universally processes requests for any combination of UE features and delivers appropriate portions. This multi-functional approach ensures complete feature-specific information reception while simplifying transmission management.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Data Source

PatentUS20260082312A1Feature-specific on-demand system information for wireless communications

Publication Date: 2026.03.19 QUALCOMM INC

AI summary

Methods, systems, and devices for wireless communications are described. In some examples, a user equipment (UE) may transmit a system information (SI) request to an anchor cell. The SI request may include a request for a first type of SI and may indicate a UE feature associated with the first type of SI. A distributed unit (DU) of the anchor cell may obtain and forward the request to a central unit (CU) of the anchor cell. The CU may receive the SI request and may output a transmission request instructing the DU to transmit the first type of SI. The DU may output the first type of SI in response to receiving the transmission request. For example, the DU may output the first type of SI to a radio unit (RU) of the anchor cell, which may transmit the first type of SI to the UE.