Uplink Carrier State Control for Asymmetric Aggregation
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Solution Overview
Problem
Current wireless communication systems face inefficiencies in performing communication and controlling multiple component carriers, particularly in uplink signal transmission, especially in asymmetric carrier aggregation environments.
Innovation Solution
A method and apparatus for efficiently controlling uplink transmission in wireless communication systems with multiple component carriers, where the state of uplink component carriers is dynamically adjusted to optimize the transmission of CQI and SRS signals, allowing for efficient communication even in asymmetric conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple uplink component carriers are configured for carrier aggregation, then communication efficiency and data rate are improved, but device complexity and control difficulty increase
Solution Approach 1:
The patent segments the uplink component carrier control by introducing separate indication mechanisms for different carrier states. The base station divides the multiple component carriers into different states (active, dormant, inactive) and sends specific indication information for each state, allowing the user equipment to control each carrier independently according to its state, thereby reducing overall control complexity while maintaining high communication efficiency
Solution Approach 2:
The patent implements dynamic state transitions for component carriers. The base station can dynamically change the state of each component carrier (between active, dormant, and inactive states) and send corresponding indication information to the user equipment. This dynamic control allows the system to adapt to changing communication conditions, optimizing the balance between communication efficiency and control complexity in real-time
2Adaptability or versatility
If component carrier states are dynamically changed, then communication adaptability is improved, but signal transmission reliability deteriorates
Solution Approach 1:
The patent applies preliminary action by having the base station send state indication information to the user equipment before actual state transitions occur. This advance notification allows the user equipment to prepare for upcoming state changes, ensuring that control signals are transmitted and received reliably during transitions, thereby maintaining signal transmission reliability while achieving dynamic adaptability
Solution Approach 2:
The patent implements feedback mechanisms where the base station monitors the state of each component carrier and sends indication information to the user equipment accordingly. The system continuously feedbacks the current state and adjusts future states based on communication conditions, ensuring that dynamic changes are made reliably with proper confirmation and acknowledgment at each step
3Productivity
If uplink component carriers are activated for CQI and SRS transmission, then communication efficiency is improved, but battery power consumption increases
Solution Approach 1:
The patent implements periodic action by having the user equipment transmit CQI and SRS signals only during active periods when component carriers are in the active state. The base station controls the timing of these transmissions by managing the active/dormant/inactive states of carriers, allowing the user equipment to periodically activate transmission only when necessary, thereby improving uplink signal transmission efficiency while reducing overall battery power consumption compared to continuous transmission
Solution Approach 2:
The patent applies local quality by enabling CQI and SRS transmission on specific component carriers only when those carriers are in the active state. Instead of requiring all component carriers to maintain constant transmission capability, the system selectively activates transmission quality only on carriers where it is currently needed, optimizing the balance between uplink signal transmission efficiency and power consumption
Data Source
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AI summary
The present invention is directed to a wireless communication system. More specifically, the present invention is directed to a method and an apparatus of controlling uplink transmission at a user equipment in a wireless communication system, wherein the user equipment is connected to multiple component carriers, which includes receiving configuration information for transmitting an uplink signal from a base station; and identifying a time for transmitting the uplink signal to the base station on a corresponding uplink component carrier in use of the configuration information, wherein if the corresponding uplink component carrier is in a non-available state at the time for transmitting the uplink signal, the uplink signal is not transmitted.