Narrowband Uplink Carrier Selection for MTC Devices
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Solution Overview
Problem
Current wireless communication systems are inefficient for machine type communication devices due to high signaling overhead and potential network congestion, as they were designed for mobile phone traffic and do not effectively manage the large number of small messages from MTC devices, which can degrade mobile phone user experience and consume excessive radio resources.
Innovation Solution
The solution involves reserving a portion of a wideband carrier for machine type communication traffic by providing multiple narrowband uplink carriers within the wideband carrier, allowing MTC devices to select and use a specific narrowband carrier for communication, thereby optimizing resource usage and reducing congestion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If MTC devices use the existing wideband carrier for communication, then network coverage is maintained, but signaling overhead increases and network congestion occurs
Solution Approach 1:
The wideband carrier is segmented into multiple narrowband carriers (first narrowband uplink carrier and second narrowband uplink carrier). MTC devices are assigned to specific narrowband carriers, which divides the signaling load and reduces congestion on any single carrier while maintaining overall network coverage through the combined narrowband carriers.
2Productivity
If MTC devices transmit frequent small messages, then data throughput is improved, but radio resources are consumed excessively
Solution Approach 1:
By segmenting the uplink into multiple narrowband carriers, the system can distribute frequent small messages from MTC devices across multiple carriers. This allows parallel transmission of messages, improving overall data throughput while reducing the radio resource consumption on any single carrier through load distribution.
3Reliability
If MTC devices remain in ready state for paging, then communication reliability is improved, but power consumption increases
Solution Approach 1:
The narrowband carrier structure enables more efficient paging mechanisms where MTC devices can be pageed on specific carriers rather than requiring continuous readiness across the entire wideband spectrum. This segmented approach maintains communication reliability for critical messages while allowing devices to enter lower-power states more frequently.
Data Source
AI summary
Uplink carrier selection is performed for reduced bandwidth machine type communication devices by reserving a portion of a wideband carrier for machine type communication traffic to provide a plurality of narrowband uplink carriers in the wideband carrier, and by selecting a narrowband uplink carrier of the plurality of narrowband uplink carriers for use by a machine type communication device.