Aggregated Slots via Multiple Beamformed Channels
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Solution Overview
Problem
Current wireless communication systems using directional beamforming in mmW frequencies are sensitive to blocking, which reduces signal-to-noise ratio (SNR) and quality of service (QoS) due to dynamic obstacles and polarization mismatches, limiting the reliability and coverage of communications.
Innovation Solution
Implementing a method that uses multiple beamformed channels and aggregates transmission intervals, such as slots or mini-slots, to enhance communication robustness against blocking, by signaling and configuring beamforming settings across these intervals, allowing for flexible modulation and coding schemes and spatial filters to improve coverage and reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If directional beamforming is used to improve signal-to-noise ratio, then SNR is improved, but sensitivity to blocking increases
Solution Approach 1:
The patent segments the transmission into multiple beamformed channels (first beamformed channel and second beamformed channel) with different directions. By dividing the single beam transmission into multiple directional beams, the system maintains high SNR through beamforming while reducing blocking sensitivity, as the UE can receive data through alternative beams when one beam is blocked.
Solution Approach 2:
The patent changes the transmission parameter by using different spatial filters for different beamformed channels. The base station configures the UE with multiple spatial filters corresponding to different beam directions, allowing the system to adapt transmission parameters dynamically to avoid blocked paths while maintaining optimal SNR.
2Object-affected harmful factors
If multiple beamformed channels are used to reduce blocking sensitivity, then blocking sensitivity is reduced, but device complexity increases
Solution Approach 1:
The patent applies preliminary action by pre-configuring the UE with multiple spatial filters and beamforming parameters before data transmission. The base station provides RRC configuration including multiple spatial filter indices and beamformed channel information in advance, so that when transmission occurs, the UE is already prepared to handle multiple beams without real-time complexity.
Solution Approach 2:
The patent introduces signaling intermediaries (RRC signaling and DCI) that mediate between the base station and UE for beamforming configuration. The RRC layer carries detailed spatial filter and beamforming parameter configurations, while the physical layer uses DCI for dynamic scheduling, separating the complexity management into distinct signaling layers.
3Area of stationary object
If transmission intervals are aggregated to improve coverage, then coverage is improved, but transmission time increases
Solution Approach 1:
The patent merges multiple transmission intervals (slots) into an aggregated slot structure where the same transport block is transmitted across multiple slots using different beamformed channels. This combining approach improves coverage by providing redundant transmission opportunities while managing time loss through efficient resource utilization and the ability to stop early if successful reception occurs.
Data Source
AI summary
A base station (BS) can determine a beamforming configuration for communicating with a user equipment (UE) using aggregated slots or mini-slots, wherein the beamforming configuration can comprise multiple beamformed channels. The BS can then indicate, and the UE can identify, the beamforming configuration. The BS and the UE can then communicate with each other across the aggregated slots or mini-slots based on the beamforming configuration. Also, the BS and the UE can transmit and/or receive a transport block across the aggregated slots or mini-slots.