Cooperative Downlink Transmission for IoT Terminals

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Solution Overview

Problem

Existing communication systems in the IoT field face challenges in implementing long-distance transmission and bidirectional communication while achieving low power consumption, particularly due to the limitations in downlink communication and the overhead of control frame transmission.

Innovation Solution

The technology involves an information processing device and method that collect reception information from multiple base stations for uplink frames and process cooperative transmission of downlink frames based on this information. This includes determining a predicted transmission period and frequency for downlink frames and selecting base stations for transmission based on reception power, thereby avoiding overlapping transmissions that could exceed transmission power limits.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If control frames are transmitted periodically from base station to terminal, then bidirectional communication is enabled, but power consumption of terminal increases

Engineering Contradiction:

Improvebidirectional communicationVSAvoidpower consumption

Core Design Contradiction:

Ease of operationVSUse of energy by moving object

Solution Approach 1:

The base station transmits downlink frames periodically after detecting uplink frames, establishing a rhythmic communication pattern that enables bidirectional communication while allowing the terminal to sleep between periods, thus reducing power consumption

Inventive Principle:

Principle #19Periodic action

Solution Approach 2:

The base station uses feedback from uplink frame detection (reception information including detection timing and reception power) to determine when and how to transmit downlink frames, enabling responsive bidirectional communication without continuous transmission

Inventive Principle:

Principle #23Feedback

2Use of energy by moving object

If downlink transmission is performed after certain period from uplink transmission, then power consumption is reduced, but transmission delay increases

Engineering Contradiction:

Improvepower consumptionVSAvoidtransmission delay

Core Design Contradiction:

Use of energy by moving objectVSLoss of time

Solution Approach 1:

The base station performs preliminary detection of uplink frames and stores reception information (detection timing, reception power, frequency) before transmitting downlink frames, enabling rapid response while maintaining low power consumption by processing data in advance

Inventive Principle:

Principle #10Preliminary action

3Power

If multiple base stations transmit downlink frames simultaneously, then transmission power is increased, but overlapping transmissions cause interference

Engineering Contradiction:

Improvetransmission powerVSAvoidinterference

Core Design Contradiction:

PowerVSObject-affected harmful factors

Solution Approach 1:

The system dynamically determines transmission parameters (frequency, timing, base station selection) based on real-time reception information from multiple base stations, allowing adaptive power management and interference avoidance

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The base station changes transmission parameters (frequency, time, power level) based on reception power and detection timing information, optimizing transmission to avoid overlapping and interference while maintaining sufficient power for long-distance communication

Inventive Principle:

Principle #35Parameter changes

4Length of stationary object

If repetitive transmission is performed at multiple frequencies, then long-distance transmission is achieved, but transmission time increases

Engineering Contradiction:

Improvetransmission distanceVSAvoidtransmission time

Core Design Contradiction:

Length of stationary objectVSLoss of time

Solution Approach 1:

The system adds frequency dimension to transmission by performing repetitive transmissions at multiple frequencies, enabling long-distance communication through frequency diversity while the base station coordinates timing to minimize overall transmission time

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

Data Source

PatentUS12225470B2Information processing device and information processing method

Publication Date: 2025.02.11 SONY GROUP CORP

AI summary

Provided is an information processing device that performs processing related to long-distance transmission and bidirectional communication between a plurality of terminals and a plurality of base stations.The information processing device includes: a collection unit that collects each piece of reception information of a plurality of base stations that receives an uplink frame from a terminal; and a processing unit that processes cooperative transmission of a downlink frame from the plurality of base stations to the terminal on the basis of the reception information. After repetitive uplink frame transmission is performed by using a plurality of frequencies, a downlink frame is performed at the same frequency after a certain period of time elapses from a detection timing of the uplink frame at each frequency.