Multicarrier TTI Interruption Control for Wireless Devices
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Solution Overview
Problem
In multicarrier wireless networks, the interruption of serving cells due to changes in transmission time interval (TTI) patterns, especially with shortened TTI durations, leads to performance degradation and packet loss, as existing technologies are not optimized to handle multiple TTI patterns efficiently, resulting in excessive signal interruption and performance impact.
Innovation Solution
The implementation of methods and arrangements in both wireless devices and network nodes to manage TTI changes by determining and controlling interruption parameters based on TTI duration, ensuring that communication interruptions do not exceed defined thresholds, allowing for seamless operation across different TTI patterns, including 2-OS, 4-OS, and 7-OS sTTI, while performing operations on secondary cells without causing significant disruptions to primary cells.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If shortened TTI patterns are implemented to reduce packet latency, then transmission speed is improved, but signal interruption increases and reliability deteriorates
Solution Approach 1:
The patent implements dynamic TTI pattern selection where the transmission time interval is adaptively adjusted based on channel conditions and network state. The system can switch between different TTI patterns (e.g., 2-OS, 4-OS, 7-OS sTTI) to optimize between transmission speed and signal reliability, resolving the contradiction by making the system flexible rather than fixed
Solution Approach 2:
The patent changes the TTI duration parameter dynamically based on operational requirements. By adjusting the TTI length from standard 1ms to shortened patterns (2-OS, 4-OS, 7-OS), the system can reduce packet latency when speed is prioritized while maintaining longer TTIs when reliability is more important, thus managing the trade-off between these parameters
2Adaptability or versatility
If multiple TTI patterns are supported to improve adaptability, then versatility is improved, but device complexity increases
Solution Approach 1:
The patent implements a universal TTI management mechanism that handles multiple TTI patterns (2-OS, 4-OS, 7-OS sTTI and standard 1ms TTI) through a single integrated control framework. This multi-functional approach allows the system to support various TTI configurations without requiring separate handling mechanisms for each pattern, thereby improving versatility while limiting the increase in complexity
Solution Approach 2:
The patent employs preliminary configuration and setup of TTI patterns before actual data transmission. By pre-configuring the available TTI patterns and their parameters in advance, the system reduces the complexity of real-time decision-making and allows for more efficient adaptation to different network conditions without increasing operational complexity
3Productivity
If bandwidth reconfiguration is performed to optimize network performance, then productivity is improved, but interruption duration increases
Solution Approach 1:
The patent performs preliminary actions by pre-configuring bandwidth settings and preparing reconfiguration parameters before actual bandwidth changes are needed. This allows the system to minimize interruption duration during bandwidth reconfiguration by having the necessary settings ready, thus improving productivity while reducing time loss
Solution Approach 2:
The patent implements dynamic bandwidth reconfiguration that adapts to network conditions in real-time. By making bandwidth changes dynamic rather than static, the system can optimize throughput when conditions permit while minimizing interruption duration by switching bandwidth configurations based on current network state and available resources
Data Source
AI summary
A method, wireless device and network node for supporting at least one transmission time interval, TTI, are disclosed. According to one aspect, a method includes communicating with a network node in a first cell on a first carrier. The method further includes determining an operation to be performed by the wireless device in a second cell on a second carrier. The method further includes performing the determined operation in the second cell while interrupting the communication with the network node in the first cell on the first carrier according to an interruption parameter that does not exceed an interruption threshold that depends on a duration of a TTI on the first carrier.