Aperiodic SRS Slot Postponement for Collision-Aware 5G Scheduling
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently managing aperiodic sounding reference signals (A-SRS) transmissions, particularly in next-generation networks like 5G, due to the lack of effective mechanisms for slot postponement configurations, leading to suboptimal resource allocation and channel quality estimation.
Innovation Solution
Implementing methods and apparatus for configuring slot postponement for A-SRS transmissions, allowing for dynamic adjustment of transmission timing through network nodes and user equipment, using RRC layers and DCI triggers to optimize resource allocation and channel quality assessment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If A-SRS transmission is scheduled at a specific slot, then channel quality estimation can be performed timely, but transmission may be blocked by resource availability issues or collisions with higher priority signals
Solution Approach 1:
The network node pre-configures multiple slot offsets (K1, K2, ..., Kn) with the UE before A-SRS transmission is needed. These predefined offsets serve as ready-to-use postponement options, allowing the UE to immediately select an appropriate offset when transmission conflicts arise, without requiring real-time negotiation or additional signaling.
Solution Approach 2:
The system implements dynamic slot selection where the UE can choose from multiple pre-configured slot offsets based on real-time resource availability and collision conditions. This dynamic adaptation allows the transmission timing to be flexible rather than fixed, resolving conflicts between timely transmission and resource availability.
2Reliability
If multiple slot offsets are configured for A-SRS transmission, then transmission reliability improves by avoiding collisions, but system complexity increases due to additional configuration parameters
Solution Approach 1:
The multiple slot offset configuration mechanism serves multiple functions: it provides collision avoidance, enables flexible scheduling, and supports both timely and deferred transmission scenarios. This multi-functional approach justifies the additional configuration parameters by delivering comprehensive transmission reliability across diverse operational conditions.
3Reliability
If A-SRS transmission is postponed to avoid collisions, then transmission success rate improves, but channel quality estimation timeliness deteriorates
Solution Approach 1:
By pre-configuring multiple slot offsets, the system enables the UE to immediately select the most appropriate transmission time when a collision is detected, rather than requiring lengthy real-time negotiation. This preliminary preparation minimizes the actual delay incurred during postponement while ensuring transmission success.
Data Source
AI summary
Aspects relate to wireless communication for slot postponing of aperiodic sound reference signals (A-SRS) by a user equipment in a wireless network. A network node, such as a gNodeB, may send at least a portion of a slot postponing configuration for transmission of aperiodic sounding reference signals (A-SRSs) to a user equipment (UE). In a particular aspect, the slot postponing configuration is established through RRC signaling and does not utilize downlink control information (DCI) or MAC-CE sent parameters for establishing the slot postponing configuration. The slot positioning configuration is used to control slot offset postponing, the number of slot offsets, the number of times transmission of A-SRS can be postponed in the UE, and priority rules based on the postponing configuration.