Reclaiming Unused Uplink Occasions for Latency Reduction
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Solution Overview
Problem
In wireless communication systems, unused uplink occasions indicated by user equipment (UE) as skipped are not utilized for transmitting uplink traffic, leading to increased latency, potential quality of service (QoS) violations, and loss of information due to strict latency requirements and small packet delay budgets, especially when uplink traffic arrives after the indication is sent.
Innovation Solution
Enabling the UE to reclaim unused uplink occasions by transmitting uplink communications using resources associated with previously indicated unused occasions, subject to parameters such as logical channels, packet delay budgets, and remaining buffer status, to reduce latency and ensure QoS compliance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the UE transmits an indication of unused uplink occasions to the network node, then the network node can efficiently allocate resources, but uplink traffic arriving after the indication may experience increased latency and QoS violations
Solution Approach 1:
The patent applies the discarding and recovering principle by allowing the UE to reclaim previously indicated unused uplink occasions for transmitting uplink traffic that arrives after the indication was sent. The UE transmits a reclaim indication to the network node, which then reassigns the previously discarded (unused) occasion to the UE for capturing the arriving traffic, thus recovering the time resource that would otherwise be lost.
2Device complexity
If the UE indicates unused uplink occasions as skipped, then the network can optimize scheduling, but uplink traffic with strict latency requirements may be dropped due to expiration of packet delay budgets
Solution Approach 1:
The patent implements feedback by introducing a reclaim indication mechanism where the UE informs the network node about uplink traffic that arrived after the unused occasion indication. The network node uses this feedback to reassign the unused occasion to the UE, ensuring that traffic with strict latency requirements can still be transmitted reliably without causing QoS violations or packet drops.
3Device complexity
If the UE waits for the next CG period to transmit uplink traffic, then the network scheduling is simplified, but latency increases and information may be lost due to expiration of packet delay budgets
Solution Approach 1:
The patent applies preliminary action by allowing the UE to prepare for potential traffic arrival by indicating unused occasions in advance. When traffic actually arrives, the UE can immediately reclaim the pre-identified unused occasion rather than waiting for the next scheduled period, thus preventing information loss due to expiration of packet delay budgets while maintaining simplified network scheduling.
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive configuration information indicating one or more uplink occasions. The UE may transmit an indication of one or more unused uplink occasions of the one or more uplink occasions. The UE may transmit an uplink communication using resources associated with at least one unused uplink occasion of the one or more unused uplink occasions. Numerous other aspects are described.