Radio Network Controller Grouping for M2M Throughput
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Solution Overview
Problem
Narrowband channels in wireless communication systems are insufficient for providing sufficient throughput for M2M communications between large groups of devices in metropolitan areas, as they support only low bit-rate transmissions.
Innovation Solution
A method and system that utilize a radio network controller to group subscriber units into logical groups based on signal quality metrics and SINR thresholds, allowing simultaneous transmissions to improve channel capacity, and dynamically add new units to existing groups or create new groups to maintain SINR thresholds.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If narrowband channels are used for M2M communications, then cost effectiveness is improved, but throughput capacity deteriorates
Solution Approach 1:
The patent segments the communication channel into multiple time slots and groups of subscriber units. By dividing the narrowband channel into structured time slots with specific uplink/downlink configurations and organizing subscriber units into groups that transmit simultaneously, the system achieves higher effective throughput while maintaining narrowband cost effectiveness. The segmentation allows multiple groups to share the channel efficiently without requiring broadband infrastructure.
2Productivity
If multiple subscriber units transmit simultaneously on narrowband channel, then channel capacity is improved, but signal quality deteriorates
Solution Approach 1:
The patent implements periodic time slot structures where groups of subscriber units transmit in organized cycles. Each time slot is configured with specific uplink and downlink periods, allowing simultaneous transmissions from multiple groups at different time intervals. This periodic organization ensures that while multiple units transmit concurrently, the structured timing prevents signal degradation by separating transmissions in time domains while maintaining overall channel capacity.
3Adaptability or versatility
If new subscriber units are added to increase network coverage, then system versatility is improved, but interference management complexity increases
Solution Approach 1:
The patent implements dynamic group formation and time slot allocation mechanisms that automatically adapt when new subscriber units are added. The system dynamically assigns new units to appropriate groups based on current channel conditions and interference levels, and adjusts time slot configurations as needed. This dynamic approach allows the network to expand coverage versatility while the automated assignment algorithms manage interference complexity without requiring manual intervention or system redesign.
Data Source
AI summary
A method and a system for operating a radio network controller (RNC) in a wireless communication system. The RNC generates a group database comprising a plurality of transmitting groups and a resultant Signal to Interference plus Noise Ratio (SINR) associated with the transmissions received from each member within each transmitting group meets a pre-defined SINR threshold. The RNC tests the received SQMs associated with a new transmitting subscriber unit with the resultant SINR associated with each transmitting group to assign the new subscriber unit to at least one transmitting group on determining that the new transmitting subscriber unit could be added to the at least one transmitting group without reducing a resultant SINR associated with the at least one transmitting group below the pre-defined SINR threshold.