UE-Specific Reference Signal Multiplexing via Capability-Based Scheduling
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Solution Overview
Problem
Modern wireless communication systems face challenges in processing multiple reference signals simultaneously, particularly for legacy receivers with single receive chains or beamformers, which limits their ability to receive and process multiple reference signal transmissions concurrently.
Innovation Solution
The proposed solution involves a method where user equipment (UE) prioritizes one reference signal over another based on its capabilities, receiving a configuration message from a network device indicating which reference signals to transmit and receive, and scheduling reference signals by the network device according to the UE's capabilities, ensuring that only supported signals are transmitted simultaneously.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple reference signals are transmitted simultaneously to a UE, then the network can perform coordinated transmission/reception and improve measurement accuracy, but legacy receivers with single receive chains or beamformers cannot receive multiple reference signal transmissions at the same time
Solution Approach 1:
The patent segments reference signals by assigning different time resources (different slots or symbols) to different reference signals. This temporal segmentation allows the network to transmit multiple reference signals to UEs with different capabilities - advanced UEs can receive multiple signals at different times for accurate channel estimation, while legacy UEs can receive their designated reference signal without interference from others
Solution Approach 2:
The patent implements dynamic reference signal configuration where the network device adaptively assigns reference signal resources based on UE capability reporting. UEs indicate their reception capabilities, and the network dynamically adjusts the scheduling of reference signals accordingly. This dynamic adaptation enables the system to optimize for advanced UEs while maintaining compatibility with legacy devices
2Productivity
If the network transmits reference signals according to advanced UE capabilities, then coordinated transmission benefits are achieved, but legacy UEs cannot process the multiplexed signals
Solution Approach 1:
The patent employs preliminary capability assessment where UEs report their reference signal reception capabilities to the network before actual transmission. The network uses this advance information to pre-configure appropriate reference signal assignments. Advanced UEs are assigned multiple reference signals with specific time-frequency resources, while legacy UEs receive single reference signal configurations, ensuring both can operate effectively without processing conflicts
3Reliability
If reference signals are multiplexed in time and frequency resources, then network coordination is improved, but the complexity of resource scheduling increases
Solution Approach 1:
The patent segments the resource scheduling problem by separating reference signal assignments based on UE capability groups. The network maintains different scheduling configurations for advanced and legacy UEs, assigning reference signals in distinct time resources or with different spatial parameters. This segmentation reduces scheduling complexity compared to managing all possible multiplexing scenarios for every UE individually
Solution Approach 2:
The patent applies local quality optimization by tailoring reference signal configurations to specific UE capabilities rather than using a uniform approach. Advanced UEs receive optimized multi-reference signal configurations with specific time-frequency-spatial parameters, while legacy UEs receive simplified single-reference signal configurations. This localized optimization improves coordination reliability for each UE type without requiring complex universal scheduling
Data Source
AI summary
A method for reference signal processing is provided. In this example, the method includes receiving, by a UE, a message from a network device, where the message indicates both that a first reference signal is to be transmitted over a first resource and that a second reference signal is to be transmitted over a second resource. The method also includes receiving, by the UE, at least the first reference signal in accordance with capabilities of the UE and the message received from the network device.