Uplink Carrier Switching Timing Patterns for Wireless Devices
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Solution Overview
Problem
Existing wireless communication systems face challenges in supporting reliable uplink transmission timing patterns, particularly in single uplink transmission modes, where communication devices may erroneously detect uplink grants for multiple carriers, leading to inefficiencies and errors.
Innovation Solution
The described techniques configure communication devices to determine the appropriate uplink carrier based on an uplink transmission timing pattern, allowing them to transition between TDD and FDD carriers during single uplink transmission modes. This includes configuring uplink carrier switching periods to facilitate RF-retuning between carriers, thereby improving power consumption, spectral efficiency, and data rates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If communication devices support multiple uplink carriers in single uplink transmission mode, then spectral efficiency and data rates are improved, but the risk of erroneous detection of uplink grants increases and system complexity increases
Solution Approach 1:
The patent segments the uplink transmission resources by introducing distinct timing patterns (first and second uplink transmission timing patterns) for different carriers. Each carrier is associated with a specific timing pattern, allowing the device to differentiate between carriers and correctly identify uplink grants by matching the received grant timing with the configured patterns for each carrier.
Solution Approach 2:
The patent introduces uplink transmission timing patterns as an intermediary mechanism between the multiple carriers and the uplink grant detection process. These timing patterns serve as reference frameworks that mediate the relationship between carriers and grants, enabling the device to correctly associate grants with their intended carriers even when multiple carriers are configured.
2Productivity
If communication devices support multiple uplink carriers in single uplink transmission mode, then spectral efficiency is improved, but device complexity increases
Solution Approach 1:
The patent segments carrier management by assigning specific timing patterns to specific carriers. The first uplink transmission timing pattern is associated with the first carrier, and the second uplink transmission timing pattern is associated with the second carrier. This segmentation simplifies the device's carrier management complexity by providing clear, distinct rules for each carrier rather than requiring complex dynamic decision-making.
Solution Approach 2:
The patent uses parameter changes in the form of different timing patterns (different time domain configurations) to differentiate between carriers. By changing the timing pattern parameters associated with each carrier, the system enables the device to manage multiple carriers more easily through predefined parameter sets rather than requiring complex real-time analysis.
3Use of energy by moving object
If uplink carrier switching periods are implemented for RF-retuning, then power consumption efficiency is improved, but transmission overhead increases
Solution Approach 1:
The patent applies preliminary action by pre-configuring uplink carrier switching periods within the timing patterns before actual transmission occurs. The network configures these switching periods in advance, allowing the device to perform RF-retuning at predetermined intervals without requiring complex real-time decisions, thus reducing both power consumption and switching overhead.
Solution Approach 2:
The patent implements periodic action through regular uplink carrier switching periods. Instead of ad-hoc switching, the device performs RF-retuning at periodic intervals defined by the configured timing patterns. This periodic approach optimizes power consumption by avoiding unnecessary switching while maintaining efficient spectral usage through structured carrier utilization.
Data Source
AI summary
Methods, systems, and devices for wireless communications are described. A communication device, otherwise known as a user equipment (UE) may receive an indication of an uplink transmission timing pattern configuration for transmitting uplink transmissions on a first carrier. The UE may identify to use both the first carrier and a second carrier during a single uplink transmission mode, where the UE may transition between sending the uplink transmissions on the first and second carriers. The UE may also determine, based on the uplink transmission timing pattern configuration, a timing of uplink carrier switching periods for retuning between transmissions on the first carrier and on the second carrier. As a result, the UE may transmit, during the single uplink transmission mode, on both the first carrier and the second carrier in accordance with the uplink transmission timing pattern configuration for the first carrier and the uplink carrier switching periods.


