Differentiated Scheduling Policy for URLLC Data Duplication
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Solution Overview
Problem
In ultra-reliable low latency communication (URLLC) systems with multi-connectivity, the use of PDCP data duplication for enhanced reliability and redundancy leads to increased radio resource consumption, which can cause queuing delays at network nodes, especially under high load conditions, affecting the scheduling of URLLC users.
Innovation Solution
Implementing a differentiated scheduling policy where the primary gNB schedules URLLC data with high priority and low packet loss rate, while the secondary gNB treats duplicated data with lower priority and higher packet loss rate, thereby minimizing queuing delays for other high-priority traffic and optimizing the cost-benefit ratio of PDCP data duplication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If PDCP data duplication is used for URLLC in multi-connectivity, then reliability is improved, but radio resource consumption increases causing queuing delays
Solution Approach 1:
The patent applies different scheduling priorities to different data packets based on their source node. Primary gNB data receives high priority scheduling while secondary gNB duplicated data receives low priority scheduling. This local differentiation in scheduling policy allows the system to maintain high reliability through data duplication while minimizing queuing delays by prioritizing critical transmissions over redundant ones.
2Reliability
If data duplication is transmitted through both primary and secondary gNBs, then redundancy is improved, but radio resource consumption increases
Solution Approach 1:
The patent changes the scheduling priority parameter based on the source node of the data packet. By dynamically adjusting the scheduling priority parameter (high for primary gNB, low for secondary gNB), the system optimizes radio resource allocation to maintain necessary redundancy while reducing overall resource consumption through differentiated handling of duplicate packets.
Data Source
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AI summary
In accordance with example embodiments of the invention there is at least a method and apparatus to perform determining, by a first network node of a communication network, a scheduling policy for data packet communications with a user equipment, wherein the user equipment is configured to use an enhanced type of service for multi connectivity operation in the communication network; and based on the determining, differentiating, by the first network node, the scheduling policy for a second network node associated with the multi connectivity operation. Further, in accordance with the example embodiments there is at least a method and apparatus to perform receiving, by a second network node, from a network node information comprising a differentiated scheduling policy for scheduling duplicate data packets of data packet communications with a user equipment, wherein the user equipment is configured to use an enhanced type of service for multi connectivity operation in the communication network; based on the differentiated scheduling policy, determining values comprising at least one of a priority level target and a block error ratio target for scheduling the duplicate data packets at the second network node for transmission to the user equipment; and based on at least the determined values, scheduling the duplicate packets for the transmission to the user equipment.