Beam Selection Using Signal Quality and Scheduling Constraints
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Solution Overview
Problem
In millimeter-wave (mmW) networks, link-specific coordination leads to throughput loss due to beams scheduled on constrained radio resources, resulting in reduced transmission opportunities for both terminal devices and the network.
Innovation Solution
A method for beam selection or reselection in terminal devices and radio access nodes, considering signal quality measurements and scheduling constraint information, prioritizing beams without scheduling constraints to minimize the impact of constrained radio resource allocation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If link-specific coordination is implemented to handle interference in mmW networks, then interference between beams is reduced, but transmission opportunities are lost due to scheduling constraints
Solution Approach 1:
The patent changes the selection criteria parameter from purely signal quality-based to a composite criterion that incorporates both signal quality measurements and scheduling constraint information. This allows the system to balance interference avoidance with maintaining transmission opportunities by selecting beams that optimize the combined metric rather than prioritizing interference reduction alone.
2Object-affected harmful factors
If beams are scheduled on constrained radio resources for coordination, then interference coordination is achieved, but throughput is reduced for terminal devices and network
Solution Approach 1:
The patent applies preliminary action by pre-evaluating both signal quality measurements and scheduling constraint information before beam selection. The terminal device or radio access node identifies beams with favorable characteristics in advance, selecting from those that meet predefined criteria. This proactive approach ensures that beams selected for coordination already have optimal properties, minimizing subsequent throughput loss while maintaining interference coordination benefits.
3Adaptability or versatility
If scheduling constraints are applied to coordinated beams, then radio resource coordination is improved, but the probability of serving on constrained resources increases causing throughput loss
Solution Approach 1:
The patent implements feedback by continuously monitoring signal quality measurements and scheduling constraint information, then using this feedback to dynamically adjust beam selection decisions. The system evaluates the combined criteria and selects beams that optimize both coordination adaptability and throughput performance. This closed-loop approach ensures that scheduling constraints are considered in real-time, preventing excessive selection of constrained beams while maintaining effective radio resource coordination.
Data Source
AI summary
One embodiment of the present disclosure relates to a method for use in a terminal device. The method comprises: obtaining signal quality measurements of plural beams; and selecting at least one serving beam from the plural beams depending upon the obtained signal quality measurements and scheduling constraint information of the plural beams. The embodiments of the present disclosure also relates to relevant radio access node device. When selecting or reselecting a serving beam for a terminal device, the scheduling constrains applied on the beams/links can be taken into consideration, which may allow an mmW network operating the link-specific coordination to control the probability that a terminal device is served by a coordinated beam on constrained radio resources at a lower level as possible.