E-PDCCH Resource Mapping for Uplink Control Channel Allocation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In wireless communications systems using HARQ, the conventional method for specifying physical uplink control channel resources is inefficient when a base station transmits control information over an enhanced physical downlink control channel, hindering transmission efficiency.
Innovation Solution
The system allows for efficient specification of physical uplink control channel resources by implicitly or explicitly determining the resources based on the resource assigned for the enhanced physical downlink control channel, using parameters like cyclic shift values and orthogonal codes, to avoid resource overlap and enhance dynamic allocation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the base station transmits control information over an enhanced physical downlink control channel, then the coverage and capacity of the system are improved, but the conventional method for specifying physical uplink control channel resources becomes inefficient and cannot properly specify resources
Solution Approach 1:
The patent changes the parameters used for PUCCH resource specification from conventional CCE-based indexing to E-PDCCH region-based indexing. Specifically, it uses the index of the first resource block in the E-PDCCH region and adds a predetermined offset value to determine the PUCCH resource index, thereby adapting the resource specification mechanism to the enhanced downlink control channel structure
Solution Approach 2:
The patent introduces a predetermined offset value as an intermediary parameter that mediates between the E-PDCCH resource allocation and the PUCCH resource specification. This offset value acts as a bridge to translate the E-PDCCH region indexing into corresponding PUCCH resource indices, enabling efficient resource specification in the enhanced system
2Duration of action of moving object
If implicit resource determination is used based on E-PDCCH resources, then dynamic allocation and flexibility are enhanced, but resource overlap and collisions may occur without proper differentiation mechanisms
Solution Approach 1:
The patent applies local quality by introducing terminal-specific offset values that are individually configured for each terminal. This ensures that while the implicit resource determination mechanism provides dynamic flexibility, each terminal has a differentiated offset value that prevents resource overlap and collisions, thereby maintaining reliability
Data Source
Figure 1
Figure 2
Figure 3
AI summary
A terminal that communicates with a base station monitors a physical downlink control channel allocated in a physical downlink control channel region and an enhanced physical downlink control channel allocated in a physical downlink shared channel region different from the physical downlink control channel region. If the enhanced physical downlink control channel is detected, the terminal reports response information via a physical uplink control channel resource corresponding to the resource in which the enhanced physical downlink control channel was detected.