Unified DTX Configuration for Multi-Carrier Wireless Devices
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Solution Overview
Problem
In wireless communication systems, the use of multiple uplink carriers with different Transmission Time Intervals (TTIs) leads to misalignment of bursts and increased battery consumption due to the mismatch in DTX cycle lengths, resulting in higher interference and power consumption.
Innovation Solution
A method where a network node configures a primary and secondary uplink carrier with different TTIs and instructs the wireless device to use DTX parameters defined for one of the TTIs for both carriers, aligning the DTX cycle lengths to reduce misalignment and interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If different TTI configurations are used on multiple uplink carriers to compensate for coverage differences, then coverage performance is improved, but burst misalignment occurs leading to increased interference and battery consumption
Solution Approach 1:
The patent changes the DTX parameter configuration from carrier-specific to unified across carriers. Specifically, it configures the same DTX cycle length, burst pattern, and periodicity parameters for all uplink carriers regardless of their different TTI durations, thereby achieving synchronized bursts while maintaining different TTI configurations for coverage compensation
Solution Approach 2:
The patent applies a universal DTX configuration set that works across multiple carriers with different TTIs. The same DTX parameters (cycle length, burst timing, periodicity) are used universally on all carriers, enabling the system to handle both 2ms and 10ms TTI carriers with a single configuration approach rather than requiring carrier-specific optimizations
2Adaptability or versatility
If different TTI configurations are used on multiple uplink carriers, then adaptability to different frequency bands is improved, but device complexity increases due to separate DTX parameter management
Solution Approach 1:
The patent implements a universal DTX parameter set that can be applied across carriers with different TTIs (2ms and 10ms). This single configuration approach eliminates the need for separate DTX parameter management for each carrier type, reducing device complexity while maintaining frequency band adaptability through the underlying different TTI configurations
3Manufacturing precision
If carrier-specific DTX parameters are used for each uplink carrier, then transmission precision is improved, but battery consumption increases due to misaligned DTX cycles
Solution Approach 1:
The patent changes the DTX parameter values to achieve synchronized timing across carriers. By configuring identical DTX cycle lengths and burst patterns, the system achieves precise alignment of transmission bursts, allowing the wireless device to enter sleep mode more effectively and reduce battery consumption while maintaining accurate transmission timing on each carrier
Data Source
AI summary
A network node (200), a wireless device (202) and methods therein, for handling discontinuous transmission, DTX, in a communication using multiple uplink carriers. The communication involves a primary uplink carrier using a first Transmission Time Interval, TTI and a secondary uplink carrier using a second TTI which is different than the first TTI. Values of DTX parameters defined for only one of the first and second TTIs are selected (2:4) for the communication, and the wireless device (202) is instructed (2:7) to use the selected values of DTX parameters for transmission on both the primary uplink carrier and the secondary uplink carrier. Thereby, misalignment of DTX cycles employed on the two uplink carriers can be avoided or reduced.