TDMA Beacon Slot Allocation for Registration Efficiency

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Solution Overview

Problem

In Time-Division Multiple Access (TDMA) systems, contention-based time slots reduce transmission throughput and efficiency due to competition among devices for bandwidth, leading to reduced dedicated time slot availability.

Innovation Solution

The method involves assigning dedicated upstream and downstream time slots, with beacon messages specifying these slots, allowing slave devices to transmit association and authentication requests during contention-based slots, and subsequently receiving responses during allocated time slots, thereby minimizing contention and optimizing time slot utilization.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If contention-based time slots are used to allow devices to compete for transmission bandwidth, then device access flexibility is improved, but transmission throughput and efficiency deteriorate due to reduced dedicated time slot availability

Engineering Contradiction:

Improvedevice access flexibilityVSAvoidtransmission throughput

Core Design Contradiction:

Adaptability or versatilityVSProductivity

Solution Approach 1:

The time slot structure is segmented into distinct phases: contention-based time slots for initial access and authentication, followed by dedicated upstream and downstream time slots for data transmission. This segmentation allows devices to compete only during designated contention periods while ensuring guaranteed bandwidth during dedicated periods, thereby maintaining access flexibility without compromising transmission throughput.

Inventive Principle:

Principle #1Segmentation

2Reliability

If longer contention-based time slots are provided to accommodate registration and authentication exchanges, then device registration completeness is improved, but dedicated time slot duration and transmission efficiency deteriorate

Engineering Contradiction:

Improvedevice registration completenessVSAvoiddedicated time slot duration

Core Design Contradiction:

ReliabilityVSDuration of action of moving object

Solution Approach 1:

Registration and authentication procedures are completed as preliminary actions during contention-based time slots before dedicated data transmission begins. The system structure ensures that all registration exchanges (association requests, authentication requests, and their responses) occur in the contention phase, allowing dedicated time slots to be used exclusively for high-efficiency data transmission without registration overhead.

Inventive Principle:

Principle #10Preliminary action

Data Source

PatentEP2912916B1Device registration and sounding in a time-division multiple access network

Publication Date: 2018.11.14 QUALCOMM INC

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AI summary

A master device transmits beacon messages to a plurality of slave devices. The beacon messages specify upstream time slots, downstream time slots, and contention-based time slots. To register a respective slave device with the master device, the respective slave device transmits an association request to the master device during a contention- based time slot and receives an association response from the master device during a first downstream time slot. In response to receiving the association response, the respective slave device transmits an authentication request to the master device during an upstream time slot and receives an authentication response from the master device during a second downstream time slot.