Terminal PUCCH Resource Selection for EPDCCH
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Solution Overview
Problem
In wireless communication systems, the conventional method of specifying a physical uplink control channel resource is hindered when a base station transmits control information via an enhanced physical downlink control channel, leading to inefficient transmission efficiency.
Innovation Solution
A terminal and base station system that monitors both physical and enhanced physical downlink control channels to dynamically select and allocate physical uplink control channel resources, using RRC signaling and channel detection units to optimize resource configuration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the base station transmits control information via an enhanced physical downlink control channel, then the number of terminals that can be accommodated increases, but the physical uplink control channel resource specification becomes inefficient
Solution Approach 1:
The patent segments the downlink control channel into two distinct types: physical downlink control channel (PDCCH) and enhanced physical downlink control channel (EPDCCH). Each channel type is associated with separate uplink control channel resources (PUCCH resources for PDCCH and E-PUCCH resources for EPDCCH). This segmentation allows the system to accommodate more terminals by using EPDCCH while maintaining efficient resource specification through dedicated PUCCH resources for each channel type, thereby resolving the contradiction between increased terminal capacity and transmission efficiency.
2Device complexity
If a conventional PUCCH resource specification method is used with EPDCCH, then device complexity is reduced, but transmission efficiency deteriorates
Solution Approach 1:
The patent introduces dynamic resource allocation mechanisms where the base station can flexibly assign PUCCH resources and E-PUCCH resources based on actual transmission needs. The terminal dynamically determines which uplink resources to use based on whether it received control information via PDCCH or EPDCCH. This dynamic approach maintains simplicity in the specification method while improving transmission efficiency by ensuring the correct resources are allocated for each channel type.
Data Source
AI summary
In a terminal that communicates with a base station, in the case where a physical downlink control channel or an enhanced physical downlink control channel, which is associated with a physical downlink shared channel on a first cell, and an enhanced physical downlink control channel associated with a physical downlink shared channel on a second cell are detected, one physical uplink control channel resource is selected from a physical uplink control channel resource configured for the physical downlink shared channel on the first cell and a physical uplink control channel resource configured for the physical downlink shared channel on the second cell.