Composite Control Channel Resource Assignment Across Multiple CCEs
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Solution Overview
Problem
Current wireless communication systems face inefficiencies in resource allocation and signaling for shared channels, particularly in managing composite control channels with multiple control elements, which can lead to excessive capacity and inadequate resource assignment based on individual user needs.
Innovation Solution
The system employs a composite control channel structure with multiple control channel elements, each containing radio resource assignment information, where remote units determine the number of elements and combine them using type indicators and CRC verification, allowing dynamic allocation and adjustment of resources based on channel conditions and user-specific requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a composite control channel with multiple control channel elements is used to provide radio resource assignment information, then the system can support multiple users and dynamic resource allocation, but the complexity of channel structure and resource management increases
Solution Approach 1:
The control channel is divided into multiple control channel elements (CCEs), where each CCE contains radio resource assignment information for different users or purposes. This segmentation allows the system to allocate resources to multiple users simultaneously while maintaining manageable complexity through standardized element structures.
Solution Approach 2:
The composite control channel structure serves multiple functions: it provides resource assignments for both uplink and downlink transmissions, supports multiple users through different CCEs, and enables dynamic allocation based on channel conditions. This multi-functionality reduces the need for separate control channels for different purposes.
2Speed
If control information is transmitted over the first few symbols of the downlink frame, then the timing for resource assignment is improved, but the capacity for control information is limited
Solution Approach 1:
The patent extends control information transmission from the time domain (first few symbols) to include the frequency domain by utilizing multiple resource blocks and control channel elements across different frequency resources. This dimensional expansion increases capacity while maintaining fast timing.
Solution Approach 2:
Multiple control channel elements are combined in a composite control channel structure, where each element contributes to the overall control information capacity. This merging allows the system to transmit more control information simultaneously without increasing transmission delay.
3Quantity of substance
If control information is spread out over the length of the frame, then the capacity for control information is increased, but the timing for resource assignment is delayed
Solution Approach 1:
The control channel is segmented into multiple control channel elements that can be distributed across the frame duration. By strategically placing CCEs at different positions, the system increases total capacity while ensuring that at least some control information is available early in the frame for timely resource assignment.
Solution Approach 2:
Critical resource assignment information is placed in control channel elements that appear early in the frame structure, ensuring that essential scheduling decisions can be made promptly. Less time-critical control information can be distributed later in the frame to increase overall capacity.
Data Source
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AI summary
A method in a wireless communication network infrastructure entity, comprises transmitting a composite control channel including at least two control channel elements. A first version of a codeword including a resource assignment is included on a first control channel element of the composite control channel and a second version of the codeword including a resource assignment is included on a second control channel element of the composite control channel. The first and second versions of the codeword are addressed to the same entity.