XR Traffic Handling via Buffer Status and Packet Discard Mechanisms
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently managing extended reality (XR) traffic, particularly in handling high data rate and low latency requirements, leading to network congestion, resource wastage, and poor user experience due to issues with buffer status reporting, packet discard mechanisms, and system frame number wraparound.
Innovation Solution
The proposed solution enhances buffer status reporting, introduces new packet discard mechanisms, and addresses system frame number wraparound issues by implementing connected mode DRX enhancements, per-PDU-set discard operations, and differentiated handling of XR traffic to reduce unnecessary transmissions and improve resource allocation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traditional buffer status reporting mechanisms are used for XR traffic, then network resources are allocated based on general traffic patterns, but this leads to network congestion and resource wastage due to insufficient differentiation of XR traffic characteristics
Solution Approach 1:
The patent applies local quality by introducing XR-specific buffer status reporting mechanisms that differentiate XR traffic from other traffic types. The network device identifies XR traffic characteristics and applies specialized handling procedures specifically to XR data packets, allowing optimized resource allocation for this particular traffic type without affecting other traffic flows.
Solution Approach 2:
The patent changes the parameters of buffer status reporting by introducing new indicators and metrics specific to XR traffic, such as packet discard rates, latency requirements, and throughput demands. These parameter changes enable the network to better understand and allocate resources for XR applications, improving transmission efficiency while reducing waste.
2Productivity
If packet discard mechanisms are implemented to handle high data rates, then network congestion is reduced, but this causes loss of information when critical packets are discarded
Solution Approach 1:
The patent implements feedback mechanisms where the network device receives buffer status reports from the user equipment that include information about packet discard events. This feedback allows the network to monitor discard rates and adjust resource allocation dynamically, ensuring that critical packets are prioritized and discarded only when necessary to maintain overall network throughput.
Solution Approach 2:
The patent applies preliminary action by pre-identifying and prioritizing critical packets before transmission. The system marks certain packets as high importance based on their content and timing requirements, and the packet discard mechanism is configured to preserve these marked packets while allowing non-critical packets to be discarded under congestion conditions.
3Reliability
If system frame number wraparound handling is implemented, then timing synchronization is improved, but this increases device complexity due to additional wraparound detection and correction mechanisms
Solution Approach 1:
The patent applies periodic action by implementing regular monitoring and resetting of system frame numbers at predetermined intervals. The wraparound detection mechanism operates periodically to check for overflow conditions and trigger appropriate correction procedures, maintaining timing synchronization without requiring continuous complex processing.
Solution Approach 2:
The patent achieves equipotentiality by ensuring that both the user equipment and network device use the same wraparound detection and handling algorithms. This symmetry in implementation simplifies the overall system complexity, as both ends of the communication link are equipped with identical capabilities to handle frame number wraparound events.
4Use of energy by moving object
If connected mode DRX enhancements are applied to reduce power consumption, then energy efficiency improves, but this increases latency in data transmission and reception
Solution Approach 1:
The patent applies dynamics by implementing adaptive DRX configurations that can dynamically adjust their parameters based on traffic conditions and QoS requirements. For XR traffic with strict latency requirements, the system shortens DRX cycles or disables DRX temporarily, while for less time-sensitive traffic, longer DRX cycles are used to maximize power savings. This dynamic adjustment resolves the contradiction between energy efficiency and latency.
Data Source
AI summary
The present disclosure provides various mechanisms to improve the communication of critical data, such as extended reality (XR) data, cloud gaming (CG) data, ultra-reliable low latency communications (URLLC) data, internet of things (IoT) data, and/or any other type of high priority data/traffic. The described mechanisms include enhancements to buffer status reporting mechanisms; packet, protocol data unit (PDU), and/or service data unit (SDU) discard mechanisms; mechanisms to resolve issues related to system frame number (SFN) wraparound; and network congestion detection mechanisms. Other embodiments may be described and/or claimed.