Uplink Sequence Configuration for Frequency Hopping in 5G Terminals
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Solution Overview
Problem
In future radio communication systems, the challenge lies in controlling DMRS and PUCCH sequences due to varying durations and starting symbols, which differ from existing LTE systems, requiring appropriate configuration of sequences for reference signals and uplink control channels.
Innovation Solution
A user terminal with a transmitting section that applies predetermined sequences to demodulation reference signals and uplink control channels in specific slots, with a control section that manages these sequences based on whether frequency hopping is used in those slots.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If frequency hopping is applied to DMRS and PUCCH sequences in future radio communication systems with flexible durations and starting symbols, then interference between cells is reduced, but sequence configuration complexity increases
Solution Approach 1:
The patent applies parameter changes by modifying sequence configuration based on frequency hopping conditions. When frequency hopping is enabled, different sequence groups are selected for different slots, and cyclic shifts are adjusted according to hopping patterns. This dynamic parameter adjustment reduces cell interference while maintaining manageable configuration complexity through systematic rules.
Solution Approach 2:
The patent implements dynamics by making sequence configuration adaptive to frequency hopping operations. The sequence group index and cyclic shift values are dynamically changed according to whether frequency hopping is applied in each slot, allowing the system to optimize interference reduction while adapting to varying transmission conditions.
2Adaptability or versatility
If sequences are configured flexibly for different durations and starting symbols in future radio communication systems, then adaptability of uplink control channels is improved, but difficulty of sequence control increases
Solution Approach 1:
The patent uses parameter changes to achieve flexible sequence configuration for different PUCCH durations and starting symbols. By systematically varying sequence group indices and cyclic shift parameters based on configurable parameters like frequency hopping enablement and slot structure, the system achieves high adaptability while keeping control difficulty manageable through rule-based determination.
Solution Approach 2:
The patent applies segmentation by dividing sequence configuration into independent controllable parameters (sequence group index, cyclic shift, frequency hopping flag). Each parameter can be independently configured and controlled, allowing flexible adaptation to different communication scenarios while simplifying the overall control mechanism through modular parameter management.
Data Source
AI summary
The present invention is designed to appropriately configure sequences that are applied to reference signals and/or uplink control channels and so on in future radio communication systems. One aspect of the user terminal of the present invention provides a transmitting section that transmits a demodulation reference signal and/or an uplink control channel, to which predetermined sequences are applied, in predetermined slots, and a control section that controls each predetermined sequence that is used in the predetermined slots based on whether or not frequency hopping is used in the predetermined slots.