Hybrid Frequency Reuse for Signalling Channels
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Solution Overview
Problem
Current frequency reuse schemes in mobile communication systems, such as semi-static and fractional frequency reuse, primarily focus on data channels and require feedback loops, limiting their effectiveness for signalling and broadcast channels, and do not efficiently adapt resource reuse factors for improved throughput.
Innovation Solution
A hybrid reuse communication scheme that subdivides data packets into sub-packets and transmits them using different resource reuse factors, eliminating the need for feedback loops and enhancing spectral efficiency by combining sub-packets from different frequency groups with predetermined weighting factors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If semi-static or fractional frequency reuse schemes are used for data channels, then spectral efficiency and data rate are improved, but feedback loops are required which limit effectiveness for signalling and broadcast channels
Solution Approach 1:
The data packet is segmented into multiple sub-packets, with different portions transmitted using different frequency reuse factors. This segmentation allows the system to achieve diversity benefits without requiring feedback loops, making it suitable for signalling and broadcast channels where feedback is not available.
Solution Approach 2:
The invention changes the frequency reuse factor parameter across different sub-packets of the same data packet. By transmitting sub-packets with different reuse factors (e.g., reuse factor 1 for some sub-packets, reuse factor 3 for others), the system achieves improved spectral efficiency without requiring feedback mechanisms.
2Reliability
If whole frequency resources are divided into sub-carrier groups for different user locations, then cell edge user signal quality is improved, but device complexity increases due to centralized scheduling requirements
Solution Approach 1:
The transmission is segmented into sub-packets that can be independently scheduled and transmitted with different frequency reuse factors. This segmentation eliminates the need for complex centralized scheduling by allowing simpler, distributed scheduling decisions for each sub-packet while still achieving the reliability benefits of location-adaptive frequency reuse.
3Reliability
If traditional frequency reuse schemes are used, then interference levels are controlled within pre-defined limits, but throughput is limited due to rigid resource allocation
Solution Approach 1:
The invention introduces dynamic frequency reuse by varying the reuse factor across different sub-packets of the same data transmission. This dynamic approach allows the system to adapt resource allocation in real-time, improving throughput while maintaining interference control through the use of multiple reuse factors rather than a single static allocation.
Data Source
Figure 1A~1B
Figure 2A~2B
Figure 3
AI summary
The method for transmitting a data signal including a plurality of data packets from a base station to a radio device comprises the steps of: subdividing each data packet into at least a first data sub-packet and a second data sub- packet; transmitting simultaneously the first data sub-packet on a first portion of total resources, having a first reuse frequency factor, and the second data sub-packet on at least one second portion of total resources having second reuse factor, said first reuse factor being different from said second reuse factor.