UE-Assisted PDCP Scheduling for Multi-Connectivity Latency
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently managing packet data convergence protocol (PDCP) scheduling and secondary node configuration for multiple connectivity scenarios, leading to increased latency and decreased throughput.
Innovation Solution
A method where user equipment (UE) transmits assistance information to a base station indicating PDCP preferences and secondary node configuration preferences, allowing the base station to coordinate PDCP routing and secondary node configuration accordingly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If existing wireless communication systems use conventional PDCP scheduling and secondary node configuration methods, then the system can maintain basic connectivity, but latency increases and throughput decreases
Solution Approach 1:
The patent implements feedback mechanisms where the UE provides assistance information about buffer status, QoS requirements, and connectivity preferences to the base station. This feedback loop enables dynamic adjustment of PDCP scheduling parameters and secondary node configuration to optimize latency and throughput based on real-time conditions
Solution Approach 2:
The system dynamically adjusts PDCP routing decisions and secondary node activation based on changing network conditions and UE preferences. The base station can flexibly configure which secondary nodes to activate and how to route PDCP packets based on real-time measurements of latency, throughput, and buffer status
2Ease of manufacture
If the base station configures secondary nodes without UE assistance information, then configuration can be performed centrally, but computing resources are wasted on unnecessary configurations
Solution Approach 1:
The UE autonomously provides assistance information about its own buffer status, QoS requirements, and connectivity preferences. This self-service approach enables the base station to make more informed configuration decisions, activating only the secondary nodes and routing paths that the UE actually needs, thereby conserving computing resources on unnecessary configurations
Solution Approach 2:
The system changes configuration parameters such as secondary node selection, PDCP routing paths, and scheduling priorities based on UE-provided parameters like buffer status and QoS requirements. This parameter-driven approach allows flexible adaptation to different UE needs without wasting resources on generic configurations
3Productivity
If the system activates multiple secondary nodes to increase bandwidth, then throughput can improve, but complexity of managing PDCP routing increases
Solution Approach 1:
The patent segments PDCP routing management by associating specific PDCP packets with specific secondary nodes based on QoS requirements. Different packet types can be routed to different secondary nodes, allowing the system to manage complexity through structured segmentation rather than monolithic routing decisions
Solution Approach 2:
The system applies local quality optimization by configuring each secondary node and routing path according to specific QoS requirements and UE preferences. Rather than uniform treatment of all traffic, the system tailors routing decisions to the specific needs of different packet types and connectivity scenarios
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment may transmit, to a base station, assistance information that indicates a packet data convergence protocol (PDCP) preference for multiple connectivity communications from a master node and one or more secondary nodes; and receive, from the base station, a communication that indicates a routing of a sequence of PDCP packages across the master node and one or more active secondary nodes. Numerous other aspects are provided.