Optimized Ranging Transmission for Multi-Device Wireless Systems

Solution Overview

Problem

Current wireless communication systems face inefficiencies in ranging operations, particularly in dense environments where many devices need to perform ranging requests, leading to increased energy consumption and latency due to the need for multiple message exchanges and dedicated time slots.

Innovation Solution

The implementation of single-sided two-way ranging (SS-TWR) and double-sided two-way ranging (DS-TWR) mechanisms that reduce the number of required message exchanges by utilizing broadcast characteristics of the wireless channel, allowing for optimized transmission procedures that minimize energy cost and latency in multi-device ranging operations.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If traditional ranging procedures are used in dense environments with many devices, then ranging requests can be fulfilled, but energy consumption increases and latency increases due to multiple message exchanges and dedicated time slots

Engineering Contradiction:

Improveranging operation completionVSAvoidenergy consumption

Core Design Contradiction:

ReliabilityVSUse of energy by moving object

Solution Approach 1:

The patent merges multiple ranging operations into a single broadcast message exchange. Instead of requiring separate dedicated time slots for each device pair, the system combines ranging requests from multiple transmit apparatuses and responses from multiple receive apparatuses into unified broadcast phases (RIP and RRP), significantly reducing the number of message exchanges and energy consumption.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The broadcast message structure serves multiple functions simultaneously: it acts as a ranging initiation message, a ranging response message, and a synchronization signal for multiple device pairs. This multi-functionality eliminates the need for separate dedicated messages for each device pair, reducing overall energy consumption while maintaining reliable ranging operations.

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Reliability

If traditional ranging procedures are used in dense environments with many devices, then ranging requests can be fulfilled, but latency increases due to multiple message exchanges and dedicated time slots

Engineering Contradiction:

Improveranging operation completionVSAvoidlatency

Core Design Contradiction:

ReliabilityVSLoss of time

Solution Approach 1:

The patent merges multiple ranging operations into a single broadcast message exchange. Instead of requiring separate dedicated time slots for each device pair, the system combines ranging requests from multiple transmit apparatuses and responses from multiple receive apparatuses into unified broadcast phases (RIP and RRP), significantly reducing the number of message exchanges and energy consumption.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The system performs preliminary synchronization and message structure preparation in advance, allowing all devices to be ready for the broadcast phases. The ranging initiation phase (RIP) and ranging response phase (RRP) are pre-configured with slot structures that enable simultaneous participation of multiple devices, reducing the time required for sequential message exchanges.

Inventive Principle:

Principle #10Preliminary action

3Measurement precision

If multiple message exchanges are used for ranging between many devices, then accurate ranging can be achieved, but the number of message exchanges increases leading to higher energy consumption

Engineering Contradiction:

Improveranging accuracyVSAvoidnumber of message exchanges

Core Design Contradiction:

Measurement precisionVSQuantity of substance

Solution Approach 1:

The patent merges multiple ranging operations into a single broadcast message exchange. Instead of requiring separate dedicated time slots for each device pair, the system combines ranging requests from multiple transmit apparatuses and responses from multiple receive apparatuses into unified broadcast phases (RIP and RRP), significantly reducing the number of message exchanges and energy consumption.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The patent segments the ranging process into two distinct broadcast phases: Ranging Initiation Phase (RIP) where transmit apparatuses send requests, and Ranging Response Phase (RRP) where receive apparatuses send responses. This segmentation allows multiple devices to participate simultaneously in each phase while maintaining the necessary message structure for accurate ranging measurements.

Inventive Principle:

Principle #1Segmentation

Data Source

PatentUS11448751B2Optimized transmission for single/double-sided two-way ranging among many devices

Publication Date: 2022.09.20 SAMSUNG ELECTRONICS CO LTD

AI summary

A method of a transmit apparatus in a wireless communication system supporting ranging capability is provided. The method comprises: for a single-sided two-way ranging (SS-TWR), identifying a ranging round (RR) including a ranging initiation phase (RIP) for a set of transmit apparatuses including the transmit apparatus and a ranging response phase (RRP) for a set of receive apparatuses, wherein the RIP and the RRP comprise at least one slot; transmitting, to the set of receive apparatuses, a ranging initiation message in the RIP; and receiving, from one or more of the set of receive apparatuses, a ranging response message including information requested by the transmit apparatus in the RRP.