Orthogonal PUCCH Resource Allocation for Carrier Aggregation
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Solution Overview
Problem
In wireless communication systems, particularly in carrier aggregation systems, there is a challenge in efficiently transmitting acknowledgement/not-acknowledgement (ACK/NACK) signals using spatially orthogonal resource transmit diversity (SORTD) across multiple antenna ports, especially when additional antenna ports are involved, leading to resource allocation issues.
Innovation Solution
Configuring orthogonal physical uplink control channel (PUCCH) resources for multiple antenna ports and using these resources to transmit the same uplink control signal, including ACK/NACK signals, to ensure efficient transmission across multiple cells in a carrier aggregation system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If transmit diversity is applied to transmit ACK/NACK signals using multiple antenna ports, then reliability of signal transmission is improved, but resource allocation complexity increases due to the need to assign orthogonal resources to additional antenna ports
Solution Approach 1:
The patent segments the PUCCH resources into different orthogonal resources for different antenna ports. Specifically, it assigns a first PUCCH resource for a first antenna port and a second PUCCH resource for a second antenna port, where these resources are orthogonal to each other. This segmentation allows each antenna port to have its own dedicated resource, resolving the complexity of resource allocation while maintaining reliability through transmit diversity.
Solution Approach 2:
The patent introduces orthogonality as an additional dimension for resource separation. By making the PUCCH resources for different antenna ports orthogonal (in terms of cyclic shift, orthogonal cover code, or resource block), it creates a new dimension for distinguishing between antenna port transmissions, thereby managing resource allocation complexity while enabling reliable multi-antenna transmission.
2Productivity
If orthogonal PUCCH resources are configured for multiple antenna ports, then transmission efficiency is improved, but system complexity increases due to additional resource configuration
Solution Approach 1:
The patent applies preliminary action by pre-configuring the orthogonal PUCCH resources for multiple antenna ports before actual transmission. The base station configures the first PUCCH resource for the first antenna port and the second PUCCH resource for the second antenna port in advance, which simplifies the transmission process and improves efficiency by avoiding real-time resource allocation decisions.
3Productivity
If carrier aggregation is implemented to satisfy higher data transmission rate demand, then bandwidth is extended, but resource management complexity increases when applying transmit diversity across aggregated carriers
Solution Approach 1:
The patent segments the resource allocation by carrier, where each component carrier's ACK/NACK transmission on different antenna ports uses specifically assigned orthogonal PUCCH resources. This carrier-specific segmentation of resource management allows carrier aggregation to achieve high data transmission rates while keeping resource management complexity manageable through structured resource assignment.
Data Source
AI summary
A method for transmitting an uplink control signal of a terminal in a wireless communication system and a terminal using the method are provided. The method comprises the steps of: setting a first physical uplink control channel (PUCCH) resource for a first antenna port; setting a second PUCCH resource for a second antenna port; and transmitting a same uplink control signal through the first and second antenna ports by using the first and second PUCCH resources, wherein the first and second PUCCH resources are orthogonal to each other.