Service-Specific Scheduling Requests for 5G Uplink Latency
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Solution Overview
Problem
Current uplink grant based scheduling in 5G New Radio (NR) networks is not sufficiently fast, application-aware, or dynamic, leading to latency and increased signaling overhead.
Innovation Solution
Implementing service-specific scheduling requests (SRs) and periodic cadence reports (PCRs) that allow user equipment (UE) to request resources tailored to specific applications and services, reducing the need for buffer status reports and enhancing resource allocation based on anticipated traffic characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If traditional uplink grant based scheduling is used, then the system maintains general compatibility, but the scheduling speed is slow and latency is high
Solution Approach 1:
The patent segments the scheduling request mechanism into multiple SR configurations, each tailored to specific application types, QoS flows, or traffic characteristics. This segmentation allows the system to quickly identify and allocate resources for specific traffic types without going through general scheduling procedures, thereby reducing latency and improving scheduling speed.
Solution Approach 2:
The patent implements preliminary configuration of multiple SR configurations before actual data transmission occurs. By pre-defining SR configurations for different application types and traffic characteristics, the system can immediately trigger appropriate scheduling requests without needing to negotiate parameters in real-time, thus reducing uplink latency.
2Productivity
If application-specific SR configurations are implemented, then resource allocation becomes more efficient, but system complexity increases
Solution Approach 1:
The patent creates SR configurations that serve multiple purposes: they identify application types, indicate QoS requirements, and specify traffic characteristics all in a single configuration structure. This multi-functionality allows the system to handle diverse application requirements without proportionally increasing complexity, as one SR configuration mechanism handles what would otherwise require multiple separate signaling mechanisms.
Solution Approach 2:
The patent changes the parameters of the SR configuration to include application type identifiers, QoS flow indicators, and traffic characteristic descriptions. By embedding these parameters within the SR configuration structure, the system achieves application-specific resource allocation without requiring separate signaling procedures for each parameter, thus improving efficiency while controlling complexity.
3Adaptability or versatility
If multiple SR configurations are used for different applications, then scheduling becomes more dynamic and application-aware, but signaling overhead increases
Solution Approach 1:
The patent merges multiple pieces of information (application type, QoS requirements, traffic characteristics) into a single SR configuration structure. By combining these elements that would otherwise require separate signaling messages, the system achieves application-aware scheduling while minimizing signaling overhead, as one compact configuration carries multiple layers of scheduling information.
4Loss of time
If buffer status reports are replaced with periodic cadence reports, then resource allocation becomes more anticipatory, but the mechanism becomes more complex
Solution Approach 1:
The patent implements periodic cadence reports that provide advance information about upcoming traffic patterns and timing. By reporting cadence information in advance rather than reacting to buffer status after data arrives, the system can proactively allocate resources, reducing response time while the periodic nature of the reporting keeps the mechanism manageable in complexity.
Data Source
AI summary
A user equipment (UE) configured to receive multiple scheduling request (SR) configurations, wherein each SR configuration is specific to an application, service, quality of service (QoS) flow or set of traffic characteristics, transmit a first type of SR, wherein a plurality of different types of SRs comprising at least the first type of SR and a second type of SR each correspond to a different one of the multiple SR configurations and receive an initial uplink grant for a data transmission in response to the first type of SR, wherein the initial uplink grant indicates one or more uplink resources assigned to the UE by a network based on an application, service, quality of service (QoS) flow or set of traffic characteristics specific to the first type of SR.