Frequency Hopping with Fraction Reuse for ACK/NAK Reliability
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Solution Overview
Problem
Current wireless communication systems face inefficiencies in data transmission due to unreliable ACK/NAK transmissions during the hybrid automatic retransmission (HARQ) process, leading to delays in data delivery.
Innovation Solution
The system divides frequency into sub-bands and time into sectors, designating a restricted sub-band for minimal interference, and dynamically relocates it across sectors to enhance frequency selectivity and reduce interference, thereby improving ACK/NAK transmission reliability through a frequency hopping scheme.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If frequency hopping is used to improve ACK/NAK transmission reliability, then transmission reliability is improved, but system complexity increases
Solution Approach 1:
The frequency band is segmented into multiple sub-bands, and the system divides the frequency range into distinct regions (restricted and non-restricted sub-bands). This segmentation allows ACK/NAK transmissions to hop between different frequency segments, providing diversity while maintaining manageable system complexity through structured organization of the frequency spectrum.
Solution Approach 2:
The system dynamically adjusts the frequency allocation for ACK/NAK transmissions by designating certain sub-bands as restricted and others as non-restricted based on current interference conditions. This dynamic reconfiguration allows the system to adapt to changing channel conditions without requiring complete system redesign, balancing reliability improvement with complexity control.
2Object-affected harmful factors
If frequency fraction reuse with restricted sub-bands is implemented to reduce interference, then interference reduction is achieved, but frequency utilization efficiency decreases
Solution Approach 1:
The system applies different quality characteristics to different frequency regions by designating restricted sub-bands for ACK/NAK transmissions and non-restricted sub-bands for data transmissions. This local differentiation allows interference to be managed in specific frequency regions without affecting the entire spectrum, maintaining high frequency utilization efficiency while reducing interference where critical transmissions occur.
Solution Approach 2:
The system employs periodic frequency hopping patterns for ACK/NAK transmissions across restricted and non-restricted sub-bands. This periodic action ensures that critical control signals are transmitted during periods when interference is minimized, while data transmissions can utilize the full frequency spectrum during other periods, thereby reducing interference without permanently sacrificing frequency utilization efficiency.
Data Source
AI summary
A method and apparatus for a wireless communication system, for frequency hopping using frequency fraction reuse scheme. The frequency hopping pattern is generated by dividing a portion of frequency into plurality of sub-bands, dividing a portion of time into plurality of sectors, each sector comprising the divided sub-bands, designating one of the divided sub-band within one of the sectors as the restricted sub-band, and allocating a location the designated sub-band as a restricted sub-band.