Region-Specific Beam Configuration for Wireless Device Mobility
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Solution Overview
Problem
Current radio access networks face challenges in handling wireless devices moving at different speeds within a cell, as existing configurations are often rigid and not tailored to specific mobility scenarios, leading to suboptimal performance in high-speed scenarios and resource inefficiency.
Innovation Solution
Implementing region-specific beam configurations in a radio access network that adjust based on the expected speed of movement of wireless devices, using data measurements to determine optimal DMRS and preamble formats for each region, allowing for dynamic configuration of beams to suit varying mobility patterns.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a dense DMRS pattern is configured for high-speed UEs, then the ability to track fast changes in the radio channel is improved, but resources that could be used for data transfer are reduced
Solution Approach 1:
The patent applies local quality by configuring different DMRS patterns in different geographic regions or beams within the cell. High-speed UEs in specific regions receive dense DMRS configurations while low-speed UEs in other regions receive sparse DMRS configurations, allowing each region to optimize its resource allocation according to local mobility characteristics
Solution Approach 2:
The patent implements dynamics by making the DMRS configuration adaptive rather than static. The network determines UE speed based on timing advance or other measurements and dynamically selects appropriate DMRS patterns from a set of configured patterns, allowing the system to transition between sparse and dense configurations based on real-time UE mobility conditions
2Device complexity
If a one-size-fits-all broadcast configuration is used for all UEs in the cell, then the configuration simplicity is improved, but the performance for specific mobility scenarios deteriorates
Solution Approach 1:
The patent segments the cell into multiple regions or beams, each with its own optimized configuration parameters. Instead of a single broadcast configuration for the entire cell, different configuration sets are assigned to different spatial segments, allowing each segment to be optimized for its dominant mobility scenario while maintaining manageable complexity through structured organization
Solution Approach 2:
The patent changes configuration parameters (such as DMRS pattern, preamble format, subcarrier spacing) based on detected UE mobility conditions. The network monitors UE speed and adjusts configuration parameters dynamically, transforming the static broadcast configuration into an adaptive system that modifies parameters according to actual mobility scenarios
3Productivity
If an initial DMRS configuration is provided during connection establishment, then high data rate communication can start immediately, but the configuration may be unsuitable if the UE is later detected to be in a high-speed scenario
Solution Approach 1:
The patent applies preliminary action by pre-configuring multiple DMRS patterns and providing a first configuration during connection establishment that is suitable for low-speed scenarios. This initial configuration enables immediate data transfer while the system prepares alternative configurations for high-speed scenarios, balancing immediate productivity with future adaptability
Solution Approach 2:
The patent implements dynamics by enabling smooth transitions between different DMRS configurations. When a UE is detected to enter a high-speed scenario, the system switches from the initial sparse DMRS pattern to a pre-configured dense DMRS pattern without requiring full RRC reconfiguration, maintaining both initial productivity and subsequent reliability
4Reliability
If a rigid cell configuration is used for high-speed or moderate-speed users, then the performance for those specific scenarios is improved, but the ability to support a mixture of different UE mobility speeds deteriorates
Solution Approach 1:
The patent segments the cell into multiple spatial regions or beams, each optimized for different mobility scenarios. This allows the cell to simultaneously support high-speed users in certain regions and low-speed users in other regions, achieving both specialized performance and broad adaptability through spatial division
Solution Approach 2:
The patent implements universality by designing a multi-functional cell configuration that can serve multiple mobility scenarios simultaneously. Through beam-specific or region-specific configurations, a single cell structure achieves the capabilities of multiple specialized cells, supporting diverse UE types without requiring separate rigid configurations for each scenario
Data Source
AI summary
According to an aspect, there is provided a method of operating a first radio access network, RAN, node in a communication network. The first RAN node is configured to serve a plurality of regions of a first cell with respective beams. The method comprises providing (601) a region-specific beam configuration for each of the beams, wherein the region-specific beam configuration for abeam is set according to an expected speed of movement of wireless devices in said region.