PUCCH Resource Allocation for Uplink Control Information
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Solution Overview
Problem
The increasing demand for data transmission in cellular networks due to M2M communication and devices like smartphones has led to a need for more efficient use of finite radio resources for uplink data and control information in wireless communication systems.
Innovation Solution
A method and apparatus for efficiently transmitting and receiving uplink signals by using offset information to determine available PUCCH resources for ACK/NACK transmission, allowing user equipment to transmit ACK/NACK information based on received PDCCH resources, enhancing resource utilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the number of user equipments and uplink data increases to satisfy growing data transmission demand, then data throughput increases, but the efficiency of uplink resource use deteriorates due to finite radio resources
Solution Approach 1:
The patent implements dynamic PUCCH resource allocation where the base station assigns different PUCCH resources to different user equipments based on their specific needs and channel conditions. This dynamic allocation allows the system to adapt to varying traffic demands and maintain high data throughput while optimizing the use of finite uplink radio resources for control information transmission.
2Reliability
If more PUCCH resources are allocated to handle increased ACK/NACK transmission demand, then reliability of control information transmission improves, but the quantity of available resources for other purposes decreases
Solution Approach 1:
The patent segments the PUCCH resource space into user equipment-specific allocations. Each user equipment is assigned dedicated PUCCH resources based on its scheduling needs, allowing the system to provide reliable ACK/NACK transmission for each UE without requiring excessive total PUCCH resources. This segmentation enables efficient multiplexing of control information from multiple UEs across the available radio resources.
Data Source
AI summary
A method for transmitting an uplink signal by a user equipment in a wireless communication system, including receiving, by the user equipment, an enhanced physical downlink control channel (EPDCCH); receiving, by the user equipment, a physical downlink shared channel (PDSCH) based on the EPDCCH; and transmitting acknowledgement/negative acknowledgement (ACK/NACK) information corresponding to the PDSCH using a PUCCH resource, wherein the PUCCH resource is determined based on an index of an enhanced control channel element (eCCE) for an EPDCCH and an index of an antenna port used for EPDCCH transmission.