Wireless Beam Control with Polarization-Encoded Beam Indices
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Solution Overview
Problem
Existing beam alignment methods in wireless communication systems, such as those using synchronization signal blocks and multi-stage beam search, are inefficient in terms of resource utilization and time, especially in systems with a large number of beams, leading to increased latency and signaling overhead.
Innovation Solution
A method for beam alignment using an optical beam with inhomogeneous information, based on polarization states generated by a birefringent element or polarization superposition, allows for determining the optimal beam by transmitting a signal with specific polarization states and receiving feedback information to map the beam index, reducing the need for multiple physical resources and signaling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If beam alignment method using SSB index is employed, then beam alignment can be achieved, but time resources equal to the number of beams must be utilized causing excessive time required and resource utilization disadvantages
Solution Approach 1:
The patent combines multiple beam information into a single optical beam by encoding different polarization states to represent different beam indices. Instead of transmitting separate beams for each beam index, the system merges all beam information into one beam with varying polarization states, thereby reducing the time required for beam alignment while maintaining accurate beam identification.
Solution Approach 2:
The patent changes the polarization state parameter of the optical beam to encode different beam indices. By modulating the polarization state (e.g., horizontal, vertical, circular polarization) rather than using separate spatial beams, the system can convey multiple beam identities within a single beam transmission, significantly reducing the time resources needed for beam alignment.
2Measurement precision
If Multi-stage Beam Search method is performed in the order of broad beam to narrow beam, then beam alignment can be achieved, but delay occurs due to hand shaking between transmitting side and receiving side
Solution Approach 1:
The patent applies preliminary action by pre-configuring polarization pattern matrices at both transmitting and receiving ends before beam alignment begins. The receiving end预先 prepares multiple polarization pattern matrices that correspond to different beam indices, enabling it to quickly identify the correct beam by comparing received polarization states against pre-prepared patterns, thereby eliminating the need for iterative hand-shaking procedures.
Solution Approach 2:
The patent implements a feedback mechanism where the receiving end detects polarization states and feeds back beam index information to the transmitting end. This feedback allows the system to directly identify the optimal beam without requiring multiple rounds of broad-beam-to-narrow-beam searching, significantly reducing the delay caused by hand-shaking between transmit and receive sides.
3Area of stationary object
If a large number of beams exist within a single cell in pencil beam systems, then coverage can be extended, but resource utilization becomes inefficient and signaling overhead increases
Solution Approach 1:
The patent merges the function of multiple beams into a single optical beam by encoding beam identification information through polarization states. Instead of allocating separate time-frequency resources for each beam, the system combines all beam information into one beam, dramatically improving resource utilization efficiency while maintaining the ability to serve multiple directions through polarization multiplexing.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach reduces the number of physical resources required for beam alignment and shortens the time needed, minimizing resource utilization inefficiencies and signaling overhead in systems with pencil beams.
Implementation Method 1
The inhomogeneous information includes a plurality of polarization states generated based on a birefringent element or a polarization superposition.
Implementation Method 2
The signal to which the specific beam is applied is based on one optical beam including inhomogeneous information. The inhomogeneous information includes a plurality of polarization states
Data Source
AI summary
A method performed by a first wireless device in a wireless communication system, according to one embodiment of the present specification, comprises the steps of: transmitting, to a second wireless device, a signal to which a specific beam is applied; receiving, from the second wireless device, feedback information generated on the basis of the signal; and determining, on the basis of the feedback information, a beam related to the second wireless device.