Dynamic Quasi Co-Location Configuration for Downlink Signal Reception
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Solution Overview
Problem
Current wireless communication systems, such as LTE, face challenges in efficiently transmitting and receiving downlink signals due to limitations in radio resource management and quasi co-location properties, which affect signal reception and interference reduction.
Innovation Solution
A method and device for a user equipment (UE) that dynamically changes the use of radio resources from uplink to downlink, configuring quasi co-location properties independently for each resource, allowing for lower reception power and specific parameter assumptions, enabling effective decoding of downlink signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If radio resources are dynamically changed from uplink to downlink use, then resource utilization efficiency is improved, but signal reception quality deteriorates due to interference and improper quasi co-location configuration
Solution Approach 1:
The patent applies local quality by configuring different quasi co-location properties for different radio resources. Specifically, when a radio resource is dynamically changed from uplink to downlink use, the patent configures a first quasi co-location property indicating a first reference signal for the changed resource, and a second quasi co-location property indicating a second reference signal for other downlink resources. This localized configuration ensures that each resource uses the most appropriate reference signal for its specific function, thereby maintaining signal reception quality while enabling dynamic resource allocation.
Solution Approach 2:
The patent employs parameter changes by dynamically adjusting quasi co-location properties based on the usage state of radio resources. When a resource transitions from uplink to downlink use, the system changes the quasi co-location property parameter to point to an appropriate downlink reference signal. This parameter adjustment allows the system to adapt to changing resource configurations and maintain optimal signal reception characteristics throughout the dynamic resource allocation process.
2Device complexity
If a single quasi co-location property is used for all downlink resources, then device complexity is reduced, but signal decoding accuracy deteriorates due to interference from uplink resources
Solution Approach 1:
The patent resolves this contradiction by implementing local quality through differentiated quasi co-location configuration. Instead of using a single uniform configuration for all downlink resources, the patent configures a first quasi co-location property specifically for dynamically changed resources and a second quasi co-location property for other downlink resources. This localized approach maintains manageable device complexity while significantly improving signal decoding accuracy by preventing interference from uplink resources.
3Reliability
If downlink transmission power is increased to improve reception quality, then signal reception quality is improved, but interference to other users increases
Solution Approach 1:
The patent applies the blessing in disguise principle by converting the potential harm of uplink-to-downlink resource switching into a benefit. Instead of treating the resource transition as a source of interference to be suppressed, the patent configures appropriate quasi co-location properties that enable the changed resources to function effectively as downlink resources. This approach eliminates the need for increased transmission power to overcome interference, thereby improving reception quality without generating additional harmful interference to other users.
Data Source
AI summary
The present invention relates to a method and device for receiving a downlink signal by a terminal in a wireless communication system. More particularly, the method includes: receiving first quasi co-location (QCL) characteristic-related information for the downlink communication of a first RF resource; and receiving a downlink signal by using a second RF resource, wherein the second RF resource indicates an RF resource when the use of an RF resource is changed from uplink communication use to downlink communication use at a specific time, and a downlink signal is decoded by using second QCL characteristic-related information for the downlink communication of the second RF resource, and the first QCL characteristic-related information and the second QCL characteristic-related information are independently defined.