Frequency Hopping Across Basic Frequency Blocks for Uplink Reception
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Solution Overview
Problem
In the LTE-A system, there is a need to effectively utilize the broader system band to improve the reception quality of shared channel signals, which is not adequately addressed by existing frequency hopping methods within a single basic frequency block.
Innovation Solution
The mobile terminal and base station apparatuses implement frequency hopping by mapping shared channel signals across multiple basic frequency blocks, allowing for better frequency diversity effects by separating transmission bands, thereby enhancing the reception quality of shared channel signals on both uplink and downlink.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If frequency hopping is applied within a single basic frequency block in LTE system, then frequency diversity effects are achieved, but the reception quality cannot be further improved in LTE-A system with broader system band
Solution Approach 1:
The system band is divided into multiple basic frequency blocks, and the patent extends frequency hopping to operate across these multiple blocks rather than within a single block. This segmentation allows the shared channel signal to hop across different frequency blocks, effectively utilizing the broader system band of LTE-A while maintaining frequency diversity effects and improving reception quality.
2Quantity of substance
If the system band is broadened in LTE-A system, then more frequency resources are available, but the reception quality of shared channel signal is not adequately improved
Solution Approach 1:
The patent extends frequency hopping from a single-dimension approach (within one basic frequency block) to a multi-dimensional approach (across multiple basic frequency blocks). This dimensional extension allows the system to effectively utilize the broader system band width of LTE-A and convert it into improved reception quality through enhanced frequency diversity.
Data Source
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AI summary
In order to improve the reception quality of a shared channel signal transmitted on uplink or downlink, the present invention provides a mobile terminal apparatus that transmits a shared channel signal on uplink by using a predetermined number of basic frequency blocks out of a plurality of basic frequency blocks divided from a system band, each of the basic frequency blocks having a predetermined bandwidth. When receiving, on downlink, control information for frequency hopping of the shared channel signal over different basic frequency blocks, the mobile terminal apparatus maps the shared channel signal in sub-carriers in the different basic frequency blocks in such a manner that frequency hopping is performed over the basic frequency blocks in accordance with the control information, and radio-transmits a transmission signal after mapping to a base station apparatus.