PDCP Logical Channel Prioritization for Network-Coded QoS
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Solution Overview
Problem
Existing communication systems face challenges in efficiently managing logical channel prioritization for network coding, particularly in ensuring quality of service (QoS) requirements for diverse applications such as enhanced mobile broadband (eMBB) and ultra-reliable low latency communications (URLLC), leading to suboptimal resource allocation and performance.
Innovation Solution
Implementing methods and apparatuses for logical channel prioritization enhancements through network coding, including techniques like segmented-SDU and cross-SDU based network coding, to optimize resource allocation and ensure QoS for different traffic types.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If network coding is implemented for resource allocation, then resource allocation efficiency is improved, but system complexity increases due to additional coding and decoding operations
Solution Approach 1:
The patent segments Service Data Units (SDUs) into multiple segments before applying network coding. This segmentation allows the coding operations to be performed on smaller, manageable units while maintaining the ability to reconstruct original data. The segmentation approach improves resource allocation efficiency by enabling parallel processing of coded segments while keeping system complexity manageable through modular operation structures.
2Reliability
If logical channel prioritization is enhanced for multiple QoS requirements, then QoS management is improved, but channel prioritization complexity increases
Solution Approach 1:
The patent applies different priority levels and QoS parameters to different logical channels based on their specific requirements. Each logical channel is configured with localized QoS characteristics (priority, packet delay budget, packet error rate) that match its specific service needs. This local quality approach improves overall QoS management by ensuring each channel receives appropriate treatment while avoiding the complexity of uniform complex prioritization schemes.
Solution Approach 2:
The system dynamically adjusts QoS parameters such as priority values, packet delay budgets, and packet error rates based on network conditions and service requirements. By changing these parameters adaptively, the system improves QoS management responsiveness without requiring complex structural changes to the prioritization mechanism itself.
3Reliability
If segmented-SDU based network coding is used, then transmission reliability is improved, but processing overhead increases due to segmentation operations
Solution Approach 1:
The patent performs segmentation of SDUs into segments before the network coding operation. This preliminary action allows the subsequent coding and transmission processes to work with pre-prepared segmented data units, improving transmission reliability through systematic error handling. The segmentation is performed in advance in a controlled manner, minimizing processing overhead during time-critical transmission phases.
Data Source
AI summary
Procedures, methods, architectures, apparatuses, systems, devices, and computer program products for logical channel prioritization, LCP, enhancements for packet data convergence protocol, PDCP, network coding, NC, are disclosed enhancements to LCP procedure, to account for requirements accompanying the introduction of NC in a protocol layer above LCP, e.g. PDCP, enabling a receiver, for example, to receive at least X linearly-independent NC PDUs to recover the X NC SDUs, to meet common delay budget requirements of NC PDUs belonging to a same NC generation, and to support differentiated handling of NC PDUs with different characteristics.