Uplink Packet Duplication Carrier Selection
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Solution Overview
Problem
Wireless communication systems face challenges in supporting higher reliability for packet transmissions while improving resource usage and reducing interference, especially in scenarios requiring low latency and high data rates.
Innovation Solution
The implementation of an uplink packet duplication configuration that allows user equipment (UE) to select a subset of configured carriers based on signal strength metrics and exposure metrics, enabling efficient transmission of packet copies across multiple carriers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If packet duplication is implemented across multiple carriers, then reliability for packet transmissions is improved, but device complexity and power consumption increase
Solution Approach 1:
The patent implements dynamic carrier selection where the UE adaptively chooses which carriers to use for packet duplication based on real-time conditions. The selection criterion changes dynamically based on LBT procedure results, signal strength measurements, and the number of copies needed, allowing the system to maintain high reliability while adjusting complexity based on actual transmission requirements rather than using all configured carriers statically
Solution Approach 2:
The patent applies partial action by selecting a subset of configured carriers for packet duplication rather than using all available carriers. The UE determines the optimal number of copies to transmit based on reliability requirements and channel conditions, transmitting only the necessary number of packet copies on the most suitable carriers, thereby reducing device complexity and power consumption while maintaining adequate reliability
2Reliability
If packet duplication is implemented across multiple carriers, then reliability for packet transmissions is improved, but power consumption increases
Solution Approach 1:
The patent implements dynamic carrier selection where the UE adaptively chooses which carriers to use for packet duplication based on real-time conditions. The selection criterion changes dynamically based on LBT procedure results, signal strength measurements, and the number of copies needed, allowing the system to maintain high reliability while adjusting power consumption based on actual transmission requirements
Solution Approach 2:
The patent applies partial action by selecting a subset of configured carriers for packet duplication rather than using all available carriers. The UE determines the optimal number of copies to transmit based on reliability requirements and channel conditions, transmitting only the necessary number of packet copies on the most suitable carriers, thereby reducing power consumption while maintaining adequate reliability
3Productivity
If all configured carriers are used for packet transmission, then spectral efficiency may improve, but interference between multiple communication devices increases
Solution Approach 1:
The patent implements dynamic carrier selection based on LBT (Listen Before Talk) procedure results. The UE checks channel availability before transmission and selectively uses only the carriers that are currently clear of interference. This dynamic approach allows the system to achieve high spectral efficiency on available carriers while avoiding carriers that would cause or experience interference, thus resolving the contradiction between spectral efficiency and interference reduction
4Reliability
If more copies of packets are transmitted, then reliability for packet transmissions is improved, but loss of time increases
Solution Approach 1:
The patent applies preliminary action by performing LBT procedures and signal strength measurements before packet transmission to pre-identify suitable carriers. This advance preparation allows the UE to immediately transmit packet copies on pre-selected carriers without delay, achieving high reliability through multiple copies while minimizing latency by avoiding real-time carrier selection delays
Solution Approach 2:
The patent implements dynamic determination of the number of packet copies to transmit based on current channel conditions and reliability requirements. The UE adjusts the number of copies dynamically, transmitting more copies only when necessary to meet reliability targets, thereby reducing unnecessary transmission delays and minimizing latency while maintaining adequate reliability
Data Source
AI summary
Methods, systems, and devices for wireless communications are described. A user equipment (UE) may receive an uplink packet duplication configuration that indicates a set of configured carriers and a number of copies of an uplink packet to transmit. In some examples, the UE may receive the uplink packet duplication configuration from a base station. The UE may select a subset of the set of configured carriers based on a selection criterion and the number of copies of the uplink packet to transmit, and transmit an uplink packet transmission that includes the copy of the uplink packet on each carrier of the subset of the set of configured carriers based on the uplink packet duplication configuration.