Beam Sweeping Scheme Using Correspondence Information

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Solution Overview

Problem

Current beam sweeping methods in wireless communication systems require extensive system resources due to the need to traverse all spatial beams independently for uplink and downlink channels, leading to high overhead and resource consumption.

Innovation Solution

The implementation of a simplified beam sweeping scheme using beam correspondence information to determine the optimal receiving and transmitting beams, reducing the number of beams needed and thus minimizing resource consumption by leveraging channel reciprocity and beam correspondence between communication devices.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If independent uplink and downlink beam sweeping is performed traversing all spatial beams, then reliable beam selection is achieved, but system resource consumption increases significantly

Engineering Contradiction:

Improvebeam selection reliabilityVSAvoidsystem resource consumption

Core Design Contradiction:

ReliabilityVSLoss of energy

Solution Approach 1:

The patent merges independent uplink and downlink beam sweeping procedures into a unified beam sweeping approach. By leveraging beam correspondence relationships between uplink and downlink channels, the system performs joint beam selection where the base station and terminal device determine corresponding beams for both directions simultaneously, rather than executing separate exhaustive searches for each channel direction.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The patent performs preliminary beam correspondence establishment by having the terminal device report its receiving beam information to the base station before actual data transmission. This preliminary action allows the base station to pre-determine the corresponding transmitting beam based on the reported receiving beam, avoiding the need for exhaustive beam sweeping during data transmission and reducing overall system resource consumption.

Inventive Principle:

Principle #10Preliminary action

2Measurement precision

If all spatial beams are traversed for beam sweeping, then optimal beam pairs are identified, but overhead increases

Engineering Contradiction:

Improvebeam pair selection accuracyVSAvoidsystem overhead

Core Design Contradiction:

Measurement precisionVSLoss of information

Solution Approach 1:

The patent applies partial action by performing beam sweeping only on a subset of spatial beams rather than exhaustively traversing all possible beams. By utilizing beam correspondence information and channel reciprocity, the system identifies a reduced set of candidate beams that are sufficient for achieving optimal beam pairs, thereby reducing the measurement overhead while maintaining selection accuracy.

Inventive Principle:

Principle #16Partial or excessive action

3Reliability

If extensive beam traversal is performed, then beam correspondence is established, but time consumption increases

Engineering Contradiction:

Improvebeam correspondence establishmentVSAvoidbeam sweeping time

Core Design Contradiction:

ReliabilityVSLoss of time

Solution Approach 1:

The patent implements periodic beam sweeping where beam correspondence is established at specific intervals rather than continuously. By performing beam sweeping periodically and reusing the established beam correspondence relationships during data transmission periods, the system reduces the time dedicated to beam management while maintaining reliable beam alignment, thus decreasing overall time consumption.

Inventive Principle:

Principle #19Periodic action

Data Source

PatentUS11101850B2Electronic device and communication method

Publication Date: 2021.08.24 SONY GROUP CORP

AI summary

An electronic device used in a first communication device side is configured for determining a simplified scheme for beam sweeping to be performed on a first channel from the first communication device to a second communication device and a second channel from the second communication device to the first communication device based on beam correspondence information of transmitting and receiving beams of the first communication device.