Full-Duplex PUSCH Repetition With Slot-Aware Frequency Hopping
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Solution Overview
Problem
In wireless communication systems, the use of frequency hopping for data channel repetition in full duplex slots (SBFD slots) can cause interference with downlink transmissions and increase latency due to mismatched frequency hopping resources, leading to unnecessary retransmissions and power waste.
Innovation Solution
Implement a slot availability rule for frequency hopping that ensures PUSCH repetitions are transmitted only in slots where frequency hopping resources coincide with uplink resources, using different sets of frequency hopping resources for full-duplex and non-full-duplex slots.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If frequency hopping is used for data channel repetition in full duplex slots, then data transmission diversity is improved, but interference with downlink transmissions increases
Solution Approach 1:
The patent applies local quality by differentiating frequency hopping behavior between full duplex slots and non-full duplex slots. In full duplex slots, frequency hopping is restricted to avoid downlink interference, while in non-full duplex slots, frequency hopping can proceed normally to provide diversity. This localized adaptation resolves the contradiction by applying frequency hopping only where it does not create harmful interference.
Solution Approach 2:
The patent introduces dynamic slot availability rules that adapt frequency hopping behavior based on slot type. The system dynamically determines whether frequency hopping is permitted in each slot based on whether it is a full duplex or non-full duplex slot, allowing the system to optimize between reliability and interference avoidance in real-time.
2Reliability
If frequency hopping resources do not coincide with uplink resources in full duplex slots, then frequency diversity is improved, but latency increases due to retransmissions
Solution Approach 1:
The patent applies preliminary action by pre-determining slot availability and frequency hopping permissions before transmission occurs. The network entity configures slot availability rules in advance, allowing the UE to predict which slots will permit frequency hopping and plan transmissions accordingly, avoiding latency-causing retransmissions.
Solution Approach 2:
The patent implements feedback mechanisms where the network entity monitors transmission outcomes and adjusts slot availability configurations. When frequency hopping causes retransmissions, the system receives feedback and modifies slot availability rules to prevent recurrence, thereby reducing latency while preserving frequency diversity where beneficial.
3Reliability
If frequency hopping is configured for all slots, then data channel repetition coverage is improved, but power consumption increases
Solution Approach 1:
The patent applies partial action by enabling frequency hopping only in non-full duplex slots where it provides coverage benefits without causing interference. In full duplex slots, frequency hopping is omitted entirely, eliminating unnecessary power consumption. This selective application maintains adequate coverage while reducing overall power usage.
Solution Approach 2:
The patent changes the operational parameters of frequency hopping based on slot type. By modifying the frequency hopping configuration parameter to be slot-dependent, the system optimizes the balance between coverage and power consumption, applying frequency hopping only when both coverage benefit and power efficiency are maximized.
Data Source
AI summary
Certain aspects of the present disclosure provide techniques for frequency hopping for data channel repetition in full duplex. A method performed by a user equipment (UE) includes receiving information from, a network entity, scheduling transmission of a plurality of uplink data channel repetitions in one or more slots according to a frequency hopping scheme that configures frequency hops between transmissions of repetitions of the plurality of uplink data channel repetitions and transmitting the plurality of uplink data channel repetitions in the one or more slots, the one or more slots comprising at least a full duplex slot including an uplink subband and a downlink subband.