Carrier Aggregation Feedback Mapping Across Component Carriers
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Solution Overview
Problem
In mobile communication systems with carrier aggregation, managing connection relations between multiple component carriers is challenging, particularly when adding or removing carriers, leading to difficulties in determining the appropriate uplink carrier for feedback information transmission.
Innovation Solution
A method for user equipment to modify connection relations between component carriers by receiving messages with identifier information, allowing for the addition, removal, or modification of connections based on specific configurations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If connection relations between downlink component carriers and uplink component carriers are indefinitely established, then the system maintains stable carrier aggregation configuration, but it becomes difficult to determine an uplink component carrier through which feedback information for data received through a downlink component carrier is to be transmitted
Solution Approach 1:
The patent segments the carrier aggregation configuration by introducing separate indication mechanisms for different connection relations. Specifically, it divides the downlink component carriers into different groups (first downlink component carrier and second downlink component carrier) and assigns different uplink component carriers for feedback transmission through separate indication information, thereby making the determination of appropriate uplink carriers clear and unambiguous while maintaining overall system stability
Solution Approach 2:
The patent applies preliminary action by pre-configuring and indicating the connection relations between downlink and uplink component carriers before actual data transmission occurs. The base station sends indication information in advance to establish which uplink carrier should be used for feedback corresponding to each downlink carrier, eliminating ambiguity during operation
2Productivity
If a new component carrier is added to extend bandwidth, then the system capacity and bandwidth are increased, but there are problems associated with connection relation establishment for the added component carrier
Solution Approach 1:
When a new component carrier is added, the patent applies preliminary action by pre-establishing the connection relation between the new downlink component carrier and an appropriate uplink component carrier through indication information sent from the base station. This allows the system to extend bandwidth while maintaining clear and manageable connection relations without requiring complex dynamic determination mechanisms
Solution Approach 2:
The patent creates a universal indication mechanism that can handle both existing and newly added component carriers uniformly. The same indication information structure and interpretation rules apply whether the downlink component carrier is newly added or pre-configured, simplifying the overall system design and reducing complexity
Data Source
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AI summary
The present invention relates to a method for enabling a terminal to communicate with data by modifying a connective relationship among component carriers in a mobile communication system to which a carrier aggregation method is applied and a terminal apparatus therefor. The method for enabling the terminal to communicate with the data by modifying the connective relationship among the component carriers in the mobile communication system to which the carrier aggregation method is applied, in connection with one embodiment of the present invention comprises the steps of: receiving a message including identifier information for modifying a connective relationship among at least one downlink component carrier and at least one uplink component carrier from a base station; receiving predetermined data through at least one downlink component carrier from the base station; and transmitting feedback data to the base station for data received through the uplink component carrier modified according to the identifier information.