Windowed Revert Repeater Channel Data Throughput

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Solution Overview

Problem

In radio communication systems, the inefficiency in transmitting periodic data like location data on windowed revert repeater channels leads to increased bandwidth usage and infrastructure costs due to the need for multiple channels and random access requests, causing collisions and delayed data transmission.

Innovation Solution

Implementing a method where subscriber units request and receive assigned windows on the control channel for data updates on the windowed revert repeater channel, allowing deterministic scheduling and synchronization, thereby eliminating the need for random access requests and reducing infrastructure requirements.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If subscribers use random access channels to transmit location data, then location tracking capability is provided, but channel collisions occur and data throughput is reduced

Engineering Contradiction:

Improvelocation tracking capabilityVSAvoiddata throughput

Core Design Contradiction:

ReliabilityVSProductivity

Solution Approach 1:

The random access channel is segmented into dedicated time windows assigned to specific subscribers. Each subscriber transmits location data only during their assigned window, eliminating collisions while maintaining location tracking capability. This segmentation transforms the shared random access channel into multiple dedicated transmission opportunities.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The system dynamically assigns transmission windows to subscribers based on their location data transmission needs. Windows are allocated and managed dynamically rather than statically, allowing the system to adapt to varying traffic patterns and optimize channel utilization while preventing collisions.

Inventive Principle:

Principle #15Dynamics

2Productivity

If multiple dedicated revert channels are allocated to accommodate more subscribers, then location data throughput for individual subscribers is improved, but infrastructure complexity and cost increase

Engineering Contradiction:

Improvelocation data throughputVSAvoidinfrastructure requirements

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

Instead of adding more frequency channels (horizontal dimension), the system introduces the time dimension by creating dedicated transmission windows within the existing channel. This temporal multiplexing allows multiple subscribers to share the same physical infrastructure without interference, achieving high throughput without increasing infrastructure complexity.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

Solution Approach 2:

The single revert channel is made multi-functional by allocating different time windows to different subscribers. The same physical channel infrastructure serves multiple subscribers simultaneously through time-division multiplexing, eliminating the need for multiple dedicated channels while maintaining high throughput for each subscriber.

Inventive Principle:

Principle #6Universality (Multi-functionality)

3Ease of operation

If subscribers request window access in every roam, then channel access is granted, but channel access time and signaling overhead increase

Engineering Contradiction:

Improvechannel access controlVSAvoidchannel access time

Core Design Contradiction:

Ease of operationVSLoss of time

Solution Approach 1:

Window assignments are determined in advance during the roam procedure rather than requiring additional requests after roaming. The subscriber receives their transmission window assignment as part of the initial roam completion signaling, eliminating the need for subsequent access requests and reducing overall channel access time.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The window assignment request and roam completion procedures are merged into a single signaling exchange. The subscriber requests both roam completion and window assignment simultaneously, and the base station responds with both grants in one message, reducing signaling overhead and access time compared to separate procedures.

Inventive Principle:

Principle #5Merging (Combining)

Data Source

PatentUS9473882B2Enhanced location data throughput on a windowed data channel in a radio communication system

Publication Date: 2016.10.18 MOTOROLA SOLUTIONS INC

AI summary

A method for enhanced data throughput on a windowed revert repeater channel in a radio communication system includes requesting, by a subscriber unit and via a control channel of the radio communication system, a window in which to transmit data updates on the windowed revert repeater channel of the radio communication system; receiving, by the subscriber unit and via the control channel, an assigned window on the windowed revert repeater channel for the data updates; monitoring, by the subscriber unit, the control channel repeater and determining a timing of the windowed revert repeater channel based on the monitoring; and reverting to the windowed revert repeater channel based on the timing and the assigned window, and transmitting the data updates during the assigned window. A subscriber unit and radio communication system are also disclosed.