Uplink Control Channel Resource Allocation in Mobile Communication
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Solution Overview
Problem
In mobile communication systems employing a single carrier scheme for uplink transmission, the quality of uplink control channels is not guaranteed due to varying channel conditions, and existing methods do not ensure high-quality transmission of control channels, which is critical for secure communication.
Innovation Solution
The solution involves allocating resource blocks for uplink control channels using a predetermined hopping pattern, regardless of the presence or absence of an uplink data channel, and employing time and frequency division multiplexing to ensure accurate transmission power control and frequency diversity, thereby improving the reception quality of control channels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If uplink control channels are transmitted using the same resource block as uplink data channels, then resource utilization is improved, but transmission quality of control channels cannot be guaranteed due to varying channel conditions
Solution Approach 1:
The patent segments control channel transmission into two distinct modes: control channels associated with uplink data channels share resource blocks (improving resource utilization), while control channels not associated with data channels use dedicated resource blocks selected according to hopping patterns (ensuring transmission quality). This segmentation resolves the contradiction by applying different resource allocation strategies to different control channel types.
Solution Approach 2:
The patent implements dynamic resource block selection for control channels not associated with data channels, where the resource block changes over time according to a hopping pattern based on cell ID, subframe number, and other parameters. This dynamic approach ensures that control channels always transmit on resource blocks with favorable channel conditions, maintaining high transmission quality while still allowing associated control channels to share data channel resources.
2Loss of time
If control channels are transmitted without retransmission, then transmission latency is reduced, but transmission reliability deteriorates under poor channel conditions
Solution Approach 1:
The patent applies preliminary action by selecting resource blocks for control channels using hopping patterns that anticipate future channel conditions. The hopping pattern is pre-calculated based on cell ID, subframe number, and other parameters, ensuring that control channels are always assigned to resource blocks with expected good channel conditions before transmission occurs. This prevents transmission failures that would require retransmission, thus maintaining low latency while ensuring reliability.
3Productivity
If resource blocks are allocated based on current channel conditions for uplink data channels, then data transmission efficiency is improved, but control channel quality cannot be guaranteed as channel conditions may change by transmission time
Solution Approach 1:
The patent implements dynamic resource block allocation for control channels not associated with data channels, where the resource block is determined by a hopping pattern that evolves with each subframe. The hopping pattern incorporates the subframe number, cell ID, and other dynamic parameters, ensuring that control channels continuously adapt to changing channel conditions and always transmit on resource blocks with favorable conditions, independent of when the data channel resources are allocated.
Data Source
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AI summary
A base station used in a mobile communication system employing a single carrier scheme for uplink transmission is disclosed. An uplink system frequency band of the mobile communication system includes a first frequency band located at a low-frequency end of the uplink system frequency band and a second frequency band located at a high-frequency end of the uplink system frequency band. Multiple resource blocks are located with frequencies between the first frequency band and the second frequency band. The base station includes a scheduler configured to allocate the first frequency band or the second frequency band to an uplink control channel and to allocate at least one of the resource blocks to an uplink data channel. The base station further includes a receiving unit configured to receive the uplink control channel in the first frequency band or the second frequency band allocated by the scheduler and to receive the uplink data channel in the at least one of the resource blocks allocated by the scheduler.