Terminal Uplink Control Channel Resource Allocation via EPDCCH Offset
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Solution Overview
Problem
In wireless communication systems, the designation of Physical Uplink Control Channel resources is inefficient, particularly when a base station uses Enhanced Physical Downlink Control Channels or operates in small cell radii, preventing improvements in transfer efficiency.
Innovation Solution
A terminal and base station system that includes modules for detecting and generating Physical Uplink Control Channels by mapping response information to resources determined by indices of Physical Downlink Control Channels, with optional offsets for each terminal, allowing efficient resource allocation even with Enhanced Physical Downlink Control Channels and small cell radii.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If Enhanced Physical Downlink Control Channel is used to increase the number of terminals, then the number of accommodated terminals is improved, but the designation of Physical Uplink Control Channel resource cannot be performed
Solution Approach 1:
The downlink control channel resources are divided into multiple EPDCCH sets (first set and second set), allowing the system to accommodate more terminals by distributing control information across different resource sets. Each set can be independently configured and monitored, enabling scalable terminal accommodation while maintaining clear resource designation for uplink control channels.
Solution Approach 2:
The patent introduces dynamic selection between different EPDCCH sets based on terminal configuration and traffic conditions. The terminal can be configured to monitor one or both sets, and the appropriate set is selected for transmitting control information, enabling flexible adaptation to varying system conditions while maintaining proper uplink resource designation.
2Area of stationary object
If Physical Uplink Control Channel resource is transmitted with small cell radius, then coverage is improved, but transfer efficiency cannot be improved
Solution Approach 1:
The patent applies different configurations and parameters for different EPDCCH sets, allowing optimization of control channel resources according to local conditions within the cell. Each set can have tailored resource allocations, modulation schemes, and coding rates suited to specific coverage requirements, thereby maintaining transfer efficiency even in small cell scenarios.
Solution Approach 2:
The system allows dynamic adjustment of EPDCCH parameters including resource block allocation, aggregation levels, and reference signal configurations. By changing these parameters based on cell radius and traffic conditions, the system can optimize both coverage area and transfer efficiency, resolving the contradiction between small cell radius and transfer efficiency.
Data Source
AI summary
Provided is a terminal that performs communication with a base station, in which a Physical Uplink Control Channel is generated by mapping response information to a Physical Uplink Control Channel resource that is determined in accordance with at least a prescribed offset and generates a Physical Uplink Control Channel, in a case where a Physical Downlink Control Channel is detected in a first Enhanced Physical Downlink Control Channel-Physical Resource Block set, and in which a Physical Uplink Control Channel is generated by mapping the response information to a Physical Uplink Control Channel resource that is determined in accordance with at least an offset which is configured individually for every terminal and generates the Physical Uplink Control Channel, in a case where the Physical Downlink Control Channel is detected in a second Enhanced Physical Downlink Control Channel-Physical Resource Block set.