Beam Modulation for Wireless Signal Reliability

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Solution Overview

Problem

Current mobile communication systems face challenges in efficiently managing beams to maintain reliable data transmission, especially in scenarios with blockage, WTRU rotation, and movement, which can lead to performance degradation due to beam misalignment and insufficient CSI feedback.

Innovation Solution

The implementation of dual-beam modulation (DBM) and multi-beam modulation (MBM) techniques, which modulate the same information on multiple beams to exploit spatial diversity and beam diversity, allowing for robust communication even in dynamic conditions by transmitting redundant symbols over different beams, and using beam management strategies like beam direction switching and width adaptation to adapt to blockages.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If beamforming is used to maintain reliable data transmission, then signal reliability is improved, but device complexity increases due to multiple beams and beam management requirements

Engineering Contradiction:

Improvesignal reliabilityVSAvoidbeam management complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent segments the transmission by dividing information into multiple copies and transmitting them over different beams simultaneously. This segmentation allows the system to maintain reliability through spatial diversity while managing complexity by using predefined beam structures and standardized signaling mechanisms for beam indication.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent employs preliminary action by pre-configuring beam sets and beam patterns before actual data transmission. The network device prepares multiple beams and their corresponding modulation schemes in advance, which simplifies real-time beam management and reduces the complexity of dynamic beam switching during transmission.

Inventive Principle:

Principle #10Preliminary action

2Reliability

If multiple beams are used to exploit spatial diversity, then robustness against blockage is improved, but loss of information increases due to potential beam misalignment and insufficient CSI feedback

Engineering Contradiction:

Improverobustness against blockageVSAvoidCSI feedback insufficiency

Core Design Contradiction:

ReliabilityVSLoss of information

Solution Approach 1:

The patent uses copying by transmitting multiple copies of the same information over different beams. This ensures that even if some beams are blocked or misaligned, the receiver can still recover the original information from the remaining beams, thereby maintaining robustness while managing information loss through redundancy.

Inventive Principle:

Principle #26Copying

Solution Approach 2:

The patent implements feedback mechanisms where the receiving device provides beam measurement reports and modulation mode recommendations to the network device. This feedback loop enables the network to adjust beam selection and modulation schemes dynamically, optimizing performance while compensating for insufficient CSI feedback through iterative refinement.

Inventive Principle:

Principle #23Feedback

3Adaptability or versatility

If beam direction switching is used to adapt to blockages, then adaptability is improved, but loss of time increases due to beam switching and realignment delays

Engineering Contradiction:

Improveadaptability to blockagesVSAvoidbeam switching delay

Core Design Contradiction:

Adaptability or versatilityVSLoss of time

Solution Approach 1:

The patent applies preliminary action by pre-configuring multiple beam directions and patterns before transmission begins. When blockages occur, the system can quickly switch between pre-prepared beams without requiring time-consuming real-time beam formation and alignment, thus maintaining adaptability while minimizing switching delays.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent implements dynamic beam management where the system can adaptively switch between different beam configurations based on real-time channel conditions and blockage detection. This dynamic approach allows the system to maintain high adaptability while optimizing switching timing to minimize time loss.

Inventive Principle:

Principle #15Dynamics

4Reliability

If redundant symbols are transmitted over different beams, then reliability is improved, but use of energy increases due to multiple transmission paths

Engineering Contradiction:

Improvecommunication robustnessVSAvoidtransmission energy

Core Design Contradiction:

ReliabilityVSUse of energy by moving object

Solution Approach 1:

The patent uses partial action by transmitting redundant symbols only when necessary, based on channel conditions and blockage detection. The system dynamically adjusts the level of redundancy and the number of beams used, transmitting full redundant information only when reliability requirements are high or blockages are detected, thereby balancing reliability improvement with energy consumption.

Inventive Principle:

Principle #16Partial or excessive action

Data Source

PatentUS10951291B2Systems and methods for beam management

Publication Date: 2021.03.16 INTERDIGITAL PATENT HOLDINGS INC

AI summary

Systems, methods, and devices are disclosed for determining a beam modulation mode and/or a carrier modulation mode. A beamformed reference signal may be transmitted to a wireless transmit/receive unit (WTRU). A beam measurement report may be received from the WTRU. The beam measurement report may include a beam modulation mode recommendation and/or a carrier modulation mode recommendation. A beam modulation mode and/or a carrier modulation mode may be determined based on a mode recommendation. A beam modulation mode and/or a carrier modulation mode may indicate a manner of transmitting same information on multiple beams.