Wireless Device Beam Selection Priority Management
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Solution Overview
Problem
In wireless communication systems, especially with high carrier frequencies, base stations using directional antennas face challenges in transmitting signals to wireless devices (WDs) that can only reliably receive signals if they choose the correct receive beam, and WDs may struggle to follow multiple beam indications due to hardware limitations, leading to insufficient signal quality.
Innovation Solution
Implementing a method where WDs prioritize beam indications based on signal types, applying the beam indication for the signal with the highest priority, such as prioritizing the Physical Downlink Shared Channel (PDSCH) over the Channel State Information Reference Signal (CSI-RS), to ensure reliable reception of the most important signals without introducing explicit signaling restrictions that impact network scheduling flexibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the base station transmits multiple signals with different beam indications simultaneously, then the network scheduling flexibility is improved, but the wireless device cannot follow all beam indications due to hardware limitations, resulting in insufficient signal quality
Solution Approach 1:
The patent changes the parameter of beam indication priority by introducing a priority field in the DCI format. This allows the network to dynamically adjust which beam indication the WD should follow by modifying the priority parameter, enabling flexible scheduling while ensuring reliable signal reception for high-priority signals.
2Productivity
If the wireless device follows all beam indications for different signals, then all signals can be received, but the hardware limitations of the WD prevent simultaneous following of multiple conflicting beam indications
Solution Approach 1:
The patent extracts the priority determination function from the WD and places it in the network side. The network decides which beam indication should be followed by setting the priority in DCI, thereby removing the burden from WD hardware to manage multiple conflicting beam indications independently.
3Reliability
If explicit signaling restrictions are introduced to manage beam indications, then signal quality can be ensured, but the network scheduling flexibility is negatively impacted
Solution Approach 1:
The patent introduces dynamic priority indication through DCI signaling. Instead of static beam indication rules, the network can dynamically change which beam indication has priority by modifying the priority field in DCI, allowing both reliable signal quality and flexible scheduling to coexist.
Data Source
AI summary
A method, system, network node and wireless device are disclosed for beam selection priority in a wireless communication system are disclosed. According to one aspect of the disclosure, a wireless device is provided. The wireless device is provided with different beam indications for reception of at least a first signal and a second signal. The wireless device includes processing circuitry configured to receive the first signal of a first signal type on a beam indicated by one of the beam indications, the first signal type having a higher priority than a second signal type of the second signal.