Reference Signal Perturbation for Early Cell Capability Detection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current wireless communication systems lack an efficient method to indicate network entity capabilities, leading to unnecessary processing effort and power consumption, especially for MTC devices attempting to connect to cells that do not support virtual carrier operations.
Innovation Solution
The system employs a mobile terminal with a processor that determines properties of reference symbols in wireless access interface resource elements, allowing it to infer communications parameters such as network capability, enabling early abandonment of initial access procedures and reducing processing effort by indicating cell capabilities before full connection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If MTC devices perform full initial cell acquisition procedures, then they can ensure reliable connection establishment, but they consume excessive processing power and energy when the cell does not support virtual carrier operations
Solution Approach 1:
The system performs preliminary capability indication by embedding VC support information in reference symbols before the MTC device commits to full initial acquisition procedures. This allows the device to check capability upfront and avoid unnecessary processing energy consumption when VC is not supported, while maintaining reliable connection establishment when VC is available.
2Adaptability or versatility
If MTC devices attempt to connect to all available cells, then they maximize connection opportunities, but they cause network overload and increased interference
Solution Approach 1:
The system enables MTC devices to perform preliminary checks of VC support capability through reference symbols before attempting connection. Devices can identify and avoid cells that do not support VC operations, reducing unnecessary connection attempts that cause network overload and interference, while still maximizing connection opportunities in cells that do support VC.
3Ease of operation
If the system provides detailed capability information during initial access, then it enables efficient device decision-making, but it increases signaling overhead and processing complexity
Solution Approach 1:
The system extracts VC support capability information from the main signaling overhead and embeds it directly in reference symbols, which are already present in the downlink transmission. This allows MTC devices to obtain capability information efficiently without increasing overall signaling overhead, as the information is carried in existing reference signal resources rather than additional signaling messages.
Data Source
Figure 1
Figure 2
Figure 3
AI summary
A perturbation is made to the contents and/or locations in time and frequency of Reference Signals (RS) transmitted by a cell, such that the perturbation implies information regarding the capability or configuration of the cell as regards the availability or configuration of a network functionality, in particular the facility to offer a narrowband virtual carrier operation. The contents and/or locations in time and frequency of the reference signals used are typically based on the physical cell identity (PCI).In certain embodiments the PCI carried by some identifiable RS resources is changed :in others,the RS is transmitted in 'unexpected' resources. The network functionality configuration information is inferred from the various relationships between these transmissions and the cell's actual PCI and/or 'expected' RS transmission resources.