Carrier Aggregation Control Information Transmission in LTE
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Solution Overview
Problem
Existing multi-carrier wireless communication systems face challenges in efficiently managing and transmitting control information across multiple carriers, particularly in dynamically assigning available carriers to user equipment in a multi-band environment, which affects resource management and high-performance processing.
Innovation Solution
A method for efficiently transmitting and receiving control information in a wideband radio access system using multi-carriers, where user-specific or user-group-specific carrier assignment information and carrier aggregation control information are dynamically or semi-statically managed through lower-layer signaling, allowing for flexible resource allocation and error feedback.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If multiple carriers are combined for wideband support, then bandwidth and data transmission capacity are improved, but control information management complexity increases
Solution Approach 1:
The patent segments control information into different types (downlink control information, uplink control information, scheduling information) and transmits them through different carriers or channels. This segmentation allows the system to manage control information more efficiently across multiple carriers without overwhelming the control plane, thereby reducing management complexity while maintaining wideband capabilities.
Solution Approach 2:
The patent introduces a new dimension for control information transmission by using carrier aggregation, where control information is distributed across multiple frequency carriers rather than being confined to a single carrier. This dimensional expansion allows the system to handle increased bandwidth while distributing control overhead across multiple dimensions, reducing the complexity burden on any single control channel.
2Adaptability or versatility
If carrier aggregation is implemented, then resource allocation flexibility is improved, but signaling overhead increases
Solution Approach 1:
The patent merges control information from multiple carriers into consolidated signaling structures where possible, and combines resource allocation instructions across aggregated carriers. By merging redundant control elements and using joint encoding schemes, the patent reduces overall signaling overhead while preserving the flexibility benefits of carrier aggregation for resource allocation.
3Adaptability or versatility
If dynamic carrier assignment is used, then system adaptability is improved, but processing complexity increases
Solution Approach 1:
The patent implements preliminary carrier assignment through pre-configured carrier sets and pre-negotiated resource pools. By performing carrier assignment and resource allocation in advance through higher-layer signaling, the patent reduces the need for complex real-time processing decisions, thereby maintaining system adaptability while lowering instantaneous processing complexity during active communication.
Data Source
AI summary
The present invention relates to wideband wireless access system, and more particularly to an effective method for transmitting control information during the combination of multiple carriers. As one embodiment of the present invention, there is provided a method by which a base station allocates a carrier to a terminal in a wideband wireless access system supporting multiple carriers, the method comprising: transmitting, to the terminal, a terminal specific or terminal group specific carrier allocation information that includes information about at least one of control information and data; and transmitting, to the terminal, a carrier combination control information that includes information about a change in the at least one candidate carrier available.