Multi-Panel UE Cell Re-Selection for Network Slicing

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Solution Overview

Problem

Existing cell re-selection procedures in wireless communication networks are slice agnostic and do not consider the spatial separation between cells, leading to potential service continuity issues when a mobile user equipment (UE) moves between neighboring cells, especially in intra-frequency scenarios where inter-cell interference occurs.

Innovation Solution

A slice-based cell re-selection procedure for multi-panel UE that determines orthogonal cells with better communication quality using multiple antenna panels, ensuring seamless service continuity by selecting cells that support the desired network slice and minimizing inter-cell interference.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If existing cell re-selection procedures are used, then the UE can maintain basic connectivity, but service continuity is not guaranteed when moving between cells with different network slice support

Engineering Contradiction:
Improveservice continuityVSAvoidnetwork slice awareness
Core Design Contradiction:
ReliabilityVSAdaptability or versatility

Solution Approach 1:

The patent applies local quality by making the cell re-selection process slice-specific. Instead of a generic re-selection procedure, the UE performs slice-aware evaluations where different measurement criteria and thresholds are applied depending on the target network slice requirements. This allows the UE to adapt its re-selection behavior to the specific quality requirements of different slices (e.g., eMBB, URLLC, mMTC), thereby ensuring service continuity while maintaining slice-specific performance characteristics.

Inventive Principle:
Principle #3Local quality

Solution Approach 2:

The patent implements parameter changes by dynamically adjusting cell re-selection parameters based on network slice information. The network provides slice-specific configuration parameters (such as measurement thresholds, offsets, and priority values) that modify the standard re-selection criteria. This enables the UE to change its evaluation parameters according to the target slice, ensuring that service continuity is maintained with appropriate quality levels for each slice type.

Inventive Principle:
Principle #35Parameter changes

2Object-generated harmful factors

If the UE selects the best-ranked candidate cell without considering orthogonality, then cell re-selection is simple and fast, but inter-cell interference increases in intra-frequency scenarios

Engineering Contradiction:
Improveinter-cell interferenceVSAvoidcell evaluation complexity
Core Design Contradiction:
Object-generated harmful factorsVSDevice complexity

Solution Approach 1:

The patent applies preliminary action by performing orthogonality checks and spatial relationship evaluations before final cell re-selection decisions are made. The UE pre-assesses the spatial characteristics of candidate cells relative to the serving cell and identifies potentially interfering configurations. This preliminary evaluation allows the UE to avoid selecting cells that would cause significant inter-cell interference, while the complexity is managed through efficient algorithms that leverage existing measurement data and spatial modeling.

Inventive Principle:
Principle #10Preliminary action

Solution Approach 2:

The patent introduces an intermediary evaluation layer between standard cell ranking and final re-selection. This intermediary mechanism incorporates spatial orthogonality assessment and interference prediction that mediates between the simple ranking criterion and the need to reduce interference. The intermediary layer uses configurable parameters and spatial relationships to adjust the effective ranking, thereby reducing interference without requiring complete redesign of the cell evaluation process.

Inventive Principle:
Principle #24Intermediary (Mediator)

3Reliability

If the UE performs slice-based cell re-selection with orthogonality checks, then service continuity and interference reduction are improved, but the re-selection procedure becomes more complex

Engineering Contradiction:
Improveservice continuityVSAvoidre-selection procedure complexity
Core Design Contradiction:
ReliabilityVSDevice complexity

Solution Approach 1:

The patent applies segmentation by dividing the cell re-selection procedure into distinct phases: standard cell ranking, slice-specific filtering, orthogonality verification, and final selection. Each phase handles a specific aspect of the re-selection process, allowing the UE to manage complexity through modular processing. The segmentation enables the system to apply sophisticated slice-aware and interference-aware criteria without overwhelming the UE's processing resources, as each segment can be executed with focused algorithms and data sets.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The patent implements dynamics by making the re-selection procedure adaptive and configurable. The complexity of the procedure can be dynamically adjusted based on network conditions, UE capabilities, and slice requirements. For example, in certain scenarios, the orthogonality checks may be simplified or bypassed, while in others, more rigorous evaluations are performed. This dynamic approach allows the system to maintain high reliability when needed while reducing complexity in scenarios where it is less critical, thereby balancing service continuity guarantees with procedural simplicity.

Inventive Principle:
Principle #15Dynamics

Data Source

PatentUS20240340785A1Cell re-selection procedure for multi-panel user equipment with network slicing
Publication Date: 2024.10.10 NOKIA TECHNOLOGIES OY
  • US20240340785A1 patent drawing
  • US20240340785A1 patent drawing
  • US20240340785A1 patent drawing

AI summary

The present disclosure relates to a technique for performing a cell re-selection procedure for a multi-panel user equipment (MPUE) in a wireless communication network that supports network slicing. More specifically, the proposed technique involves considering a spatial separation or, in other words, orthogonality between cells that support the network slice(s) of the mobile MPUE and other neighbouring cells. The mobile MPUE camps/reselects a cell X that supports its network slices only if the spatial separation between the cell X and other neighbouring cells is deemed to be high enough by the MPUE based on parameters received from a serving network node. The parameters may be reported to the MPUE by using a dedicated or broadcast signalling. By so doing, it is possible to provide the slice-based cell re-selection procedure for the mobile MPUE, which may be effectively (in terms of inter-cell interference suppression) used in the intra-frequency scenario.