Multi-Band Frequency Indicator Segmentation in Mobile Systems
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Solution Overview
Problem
Current mobile communication systems, particularly LTE-A, face challenges in supporting roaming terminals that need to operate on both overlapped legacy and new frequency bands efficiently, as existing methods lack effective mechanisms for managing multiple frequency bands and determining appropriate transmission parameters.
Innovation Solution
A method and apparatus are introduced to support multiple frequency bands by generating and broadcasting system information that includes frequency band indicators and additional frequency band indicators, allowing terminals to determine supported bands and access base stations, while calculating uplink and downlink center frequencies and transmission powers based on these indicators.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If a single frequency band indicator is used in system information, then the signaling overhead is minimized, but the terminal cannot efficiently identify support for multiple overlapped frequency bands
Solution Approach 1:
The frequency band indication is segmented into two separate indicators: a primary frequency band indicator and an additional frequency band indicator. This segmentation allows the system to convey multiple frequency band support information without creating a single complex indicator structure, resolving the contradiction between information completeness and structural complexity.
Solution Approach 2:
The solution adds an additional dimension to the frequency band indication by introducing a second indicator (additional frequency band indicator) that works in conjunction with the primary indicator. This dimensional expansion enables comprehensive representation of multiple overlapped frequency bands while maintaining simple, standardized indicator structures.
2Adaptability or versatility
If multiple frequency bands are supported for roaming terminals, then the adaptability and coverage are improved, but the complexity of managing transmission parameters increases
Solution Approach 1:
The base station uses a universal signaling approach where the additional frequency band indicator provides a standardized indication mechanism that works across multiple frequency band scenarios. This universal indicator structure enables the terminal to determine appropriate transmission parameters (center frequencies, uplink frequencies, bandwidths) for multiple frequency bands without requiring complex, scenario-specific parameter management.
3Measurement precision
If detailed frequency band information is provided for multiple bands, then the terminal can accurately determine transmission parameters, but the signaling overhead increases
Solution Approach 1:
The base station performs preliminary action by broadcasting the additional frequency band indicator in advance through system information. This allows the terminal to proactively determine all necessary transmission parameters (center frequencies, uplink frequencies, bandwidths) before actual data transmission, ensuring accurate parameter determination while avoiding the need for repeated detailed signaling during communication.
Data Source
AI summary
A method and an apparatus for supporting multiple frequency bands efficiently in a mobile communication system are provided. The method includes generating first system information including a frequency band indicator indicating a frequency band supported by the base station and an additional frequency band indicator indicating at least one frequency band supported by the base station, and broadcasting the first system information.