Beam Sweep Optimization Using Device Orientation Filtering

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Solution Overview

Problem

Beam sweeps or scans in wireless communication systems increase transmit/receive delay, radio resource consumption, energy consumption, and interference, particularly during handover and initial access procedures, due to the need to test multiple beams.

Innovation Solution

User equipment determines a set of beams to sweep or scan based on its orientation relative to Earth, excluding predefined directions where performance is unlikely, such as vertically down or up, to reduce the beam set size and minimize unnecessary transmissions.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a beam sweep or scan is performed on multiple candidate beams, then transmit or receive performance is improved, but transmit/receive delay increases

Engineering Contradiction:

Improvetransmit or receive performanceVSAvoidtransmit/receive delay

Core Design Contradiction:

ReliabilityVSLoss of time

Solution Approach 1:

The patent extracts and removes beams pointing in predefined directions (vertically up, vertically down, upward at shallow angles) from the beam sweep set. By eliminating these unlikely candidate beams beforehand, the system reduces the number of beams that need to be tested, thereby decreasing transmit/receive delay while maintaining reliable connection establishment.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

Instead of performing a complete beam sweep across all possible directions, the patent applies partial action by limiting the beam sweep to only those directions that are physically plausible for communication. This partial approach suffices for establishing reliable connections without the overhead of testing all conceivable beam directions.

Inventive Principle:

Principle #16Partial or excessive action

2Reliability

If a beam sweep or scan is performed on multiple candidate beams, then transmit or receive performance is improved, but radio resource consumption increases

Engineering Contradiction:

Improvetransmit or receive performanceVSAvoidradio resource consumption

Core Design Contradiction:

ReliabilityVSQuantity of substance

Solution Approach 1:

The patent extracts and removes beams pointing in predefined directions (vertically up, vertically down, upward at shallow angles) from the beam sweep set. By eliminating these unlikely candidate beams beforehand, the system reduces the number of beams that need to be tested, thereby decreasing radio resource consumption while maintaining reliable connection establishment.

Inventive Principle:

Principle #2Taking out (Extraction)

3Reliability

If a beam sweep or scan is performed on multiple candidate beams, then transmit or receive performance is improved, but energy consumption increases

Engineering Contradiction:

Improvetransmit or receive performanceVSAvoidenergy consumption

Core Design Contradiction:

ReliabilityVSUse of energy by moving object

Solution Approach 1:

The patent extracts and removes beams pointing in predefined directions (vertically up, vertically down, upward at shallow angles) from the beam sweep set. By eliminating these unlikely candidate beams beforehand, the system reduces the number of beams that need to be tested, thereby decreasing energy consumption while maintaining reliable connection establishment.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

Instead of performing a complete beam sweep across all possible directions, the patent applies partial action by limiting the beam sweep to only those directions that are physically plausible for communication. This partial approach suffices for establishing reliable connections without the energy overhead of testing all conceivable beam directions.

Inventive Principle:

Principle #16Partial or excessive action

4Reliability

If a beam sweep or scan is performed on multiple candidate beams, then transmit or receive performance is improved, but interference increases

Engineering Contradiction:

Improvetransmit or receive performanceVSAvoidinterference

Core Design Contradiction:

ReliabilityVSObject-generated harmful factors

Solution Approach 1:

The patent extracts and removes beams pointing in predefined directions (vertically up, vertically down, upward at shallow angles) from the beam sweep set. By eliminating these unlikely candidate beams beforehand, the system reduces the number of beams that need to be tested, thereby decreasing interference while maintaining reliable connection establishment.

Inventive Principle:

Principle #2Taking out (Extraction)

Data Source

PatentUS10897302B2Beam sweep or scan in a wireless communication system

Publication Date: 2021.01.19 TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)

AI summary

A user equipment is configured for use in a wireless communication system. The user equipment in this regard is configured to detect an orientation of an equipment coordinate frame defined for the user equipment relative to an earth coordinate frame defined for Earth. The user equipment is also configured to determine, based on the detected orientation, a set) of beams defined in the equipment coordinate frame which does not include any beam pointing in one or more predefined directions in the earth coordinate frame. The user equipment is further configured to perform a beam sweep or scan on the determined set of beams.