MAC Delay Status Reporting for Low-Overhead 5G Latency Feedback
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Solution Overview
Problem
Existing communication networks face challenges in efficiently managing and reporting latency or delay in data transmission, particularly in 5G networks, which can impact user experience and network performance.
Innovation Solution
Implementing mechanisms for delay status reporting in wireless devices and base stations, triggered by specific criteria such as traffic load, packet sizes, and traffic characteristics, to optimize data transmission and enhance network efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If delay reporting is performed for every data transmission, then measurement precision of network latency is improved, but signaling overhead and network resource consumption increase
Solution Approach 1:
The patent changes the parameter of reporting frequency by introducing conditional triggering mechanisms. Instead of periodic or event-driven reporting, the system now triggers delay reports based on multiple criteria including QoS flow characteristics, packet delay budgets, traffic load thresholds, and packet size thresholds. This selective reporting approach maintains measurement precision for critical traffic while reducing overall signaling overhead by suppressing reports for non-critical conditions.
Solution Approach 2:
The patent implements a feedback mechanism where the network configures delay reporting parameters based on observed traffic patterns and QoS requirements. The gNB receives delay reports from UEs and uses this feedback to adjust reporting configurations, dynamically balancing measurement precision needs against signaling overhead constraints through iterative optimization.
2Adaptability or versatility
If delay reporting is triggered by multiple criteria (traffic load, packet size, QoS), then adaptability of delay reporting is improved, but device complexity increases
Solution Approach 1:
The patent segments the delay reporting decision process into multiple independent evaluation criteria: QoS flow identification, packet delay budget checking, traffic load threshold evaluation, and packet size threshold checking. Each criterion operates as a separate logical module that can be independently configured and evaluated, making the complex adaptability requirements manageable through modular design while maintaining high versatility.
Solution Approach 2:
The patent introduces dynamic configuration of reporting parameters through RRC signaling and MAC CE commands. The gNB can dynamically adjust which criteria are active, modify threshold values, and change reporting formats based on real-time network conditions and QoS requirements, allowing the system to adapt its complexity level to match actual operational needs rather than maintaining fixed high complexity.
3Speed
If delay reports are sent immediately when triggered, then speed of delay information delivery is improved, but loss of time for normal data transmission increases
Solution Approach 1:
The patent merges delay report transmission with uplink data transmissions by multiplexing MAC CEs containing delay reports with uplink data on the same physical resources (PUSCH). This combining approach allows delay information to be delivered immediately when triggered without requiring separate dedicated reporting resources, thus maintaining high delivery speed while avoiding additional time loss from separate transmission opportunities.
Solution Approach 2:
The patent uses the uplink data transmission as an intermediary carrier for delay reports. Instead of direct immediate transmission that would compete for resources, the delay reports are embedded within scheduled uplink data transmissions, using the data channel as a mediator to deliver both information types efficiently without mutual interference or additional timing delays.
Data Source
AI summary
A wireless device transmits, to a base station, a medium access control (MAC) control element (CE) for delay status reporting (DSR). The MAC CE indicates a shortest remaining time, of one or more remaining times of one or more data units, based on a time associated with transmission of the MAC CE.