Selective Packet Duplication Based on Survival Time
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Solution Overview
Problem
Time-sensitive networking (TSN) systems face challenges in efficiently managing deterministic traffic with ultra-reliable, low-latency requirements over 3GPP wireless networks, where full packet duplication doubles traffic on limited air interfaces, and existing methods do not effectively utilize survival time to optimize packet handling.
Innovation Solution
The implementation of selective packet duplication or alternative packet transmission modes over two links based on survival time, where packets are duplicated or transmitted alternately, reducing traffic load while maintaining communication service availability, using dual-connectivity or carrier aggregation configurations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If full packet duplication is used to ensure ultra-reliable low-latency communication, then communication service availability is improved, but traffic load on the air interface doubles
Solution Approach 1:
The patent applies partial action by implementing selective packet duplication only for packets that require it based on survival time requirements. Instead of duplicating all packets (excessive action), the system evaluates each packet's survival time parameter and applies duplication only when necessary to meet reliability targets, thereby reducing overall traffic load while maintaining communication service availability.
Solution Approach 2:
The patent changes the parameter of packet handling from static full duplication to dynamic selective duplication based on survival time parameters. By monitoring the survival time of each packet and comparing it against threshold values, the system adjusts the duplication behavior accordingly, transforming the traffic load from a fixed high value to a variable optimized value that maintains reliability while reducing unnecessary duplication.
2Quantity of substance
If selective packet duplication or alternative transmission is implemented based on survival time, then traffic load is reduced, but system complexity increases
Solution Approach 1:
The patent applies preliminary action by pre-configuring survival time thresholds and packet handling rules before actual data transmission begins. The system establishes the relationship between survival time parameters and duplication decisions in advance, so that during operation, packets can be quickly evaluated and handled according to pre-determined criteria rather than requiring complex real-time analysis, thus reducing operational complexity.
Solution Approach 2:
The patent implements self-service by enabling packets to effectively determine their own handling requirement based on their survival time parameter. Each packet carries survival time information that automatically indicates whether it requires duplication or alternative transmission, allowing the system to make decisions based on intrinsic packet properties rather than external complex control logic, thereby simplifying the overall system architecture.
Data Source
AI summary
In some example embodiment, there may be provided an apparatus configured to at least: receive information including survival time and/or traffic pattern information indicative of deterministic traffic; determine, based on the received information, a packet handling type indicative of whether the deterministic traffic is to be carried in a selective packet duplication mode or an alternative packet transmission mode over at least two links; and perform, based on at least on the survival time, the indicated packet handling type to enable the deterministic traffic to be carried over the at least two links in the selective packet duplication mode or the alternative packet transmission mode.