Packet Duplication Activation via MAC Control Element
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Solution Overview
Problem
Current multicarrier communication systems face challenges in efficiently managing packet duplication and radio resource allocation across multiple carriers, leading to suboptimal performance in scenarios requiring high reliability and low latency.
Innovation Solution
The implementation of packet duplication mechanisms, such as PDCP duplication and RLC duplication, in conjunction with carrier aggregation and dual-connectivity architectures, allows for enhanced reliability and latency reduction by transmitting duplicate packets across multiple carriers and using coordinated MAC entities to manage radio resources effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If packet duplication is implemented to improve reliability, then data redundancy is enhanced, but device complexity increases
Solution Approach 1:
The patent implements packet duplication by creating copies of data packets and distributing them across multiple carriers. The PDCP layer generates duplicate packets that are then transmitted through different carriers to improve reliability. This copying mechanism directly addresses the reliability enhancement while managing complexity through structured duplication protocols.
Solution Approach 2:
The patent segments the packet transmission process by dividing data into separate packet flows that can be independently duplicated and transmitted across different carriers. This segmentation allows the system to manage complexity through modular handling of packet duplication, where each carrier can process packets independently while contributing to overall reliability.
2Speed
If multiple carriers are used for packet transmission to reduce latency, then transmission speed improves, but radio resource allocation complexity increases
Solution Approach 1:
The patent implements dynamic radio resource allocation across multiple carriers, allowing the system to adaptively manage resources based on real-time conditions. The MAC layer dynamically schedules packets on different carriers, adjusting allocation strategies to optimize transmission speed while managing the complexity of multi-carrier resource management through flexible, condition-based decision making.
3Reliability
If carrier aggregation is used to transmit duplicate packets, then reliability improves, but MAC entity coordination complexity increases
Solution Approach 1:
The patent merges multiple carriers into a unified transmission system where duplicate packets are coordinated across carriers through a common MAC layer. This merging approach allows the system to manage coordination complexity by treating multiple carriers as an integrated resource pool, while still benefiting from the reliability improvements of distributed packet transmission.
Data Source
AI summary
A wireless device may receive one or more messages comprising a duplication configuration parameter for a bearer. A transport block may be received. The transport block may comprise a control element indicating activation of the duplication for the bearer. In response to receiving the control element, a cell with an uplink control channel may be interrupted. During the interrupting, a hybrid automatic repeat request feedback corresponding to the transport block may be transmitted via the cell.