Downlink-Guided Antenna Port Mapping for Uplink Carrier Aggregation
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Solution Overview
Problem
Existing wireless communication devices face challenges in efficiently managing antenna contention for uplink carrier aggregation, particularly in supporting multiple wireless communication standards and technologies like LTE, LTE-A, 5G NR, and others, which affect coverage and performance.
Innovation Solution
A wireless device is configured to perform downlink measurements and determine preferred antenna ports for primary and secondary component carriers, considering factors like reference signal received power and total radiated power, to optimize antenna usage for uplink transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple antenna ports are used for uplink carrier aggregation across multiple wireless standards, then coverage and performance are improved, but antenna contention and resource management complexity increase
Solution Approach 1:
The patent changes the parameter of antenna port selection by introducing a mapping mechanism that dynamically associates antenna ports with component carriers based on measurement results. The system measures downlink reference signals, determines preferred antenna ports, and maps them to uplink carriers, thereby optimizing coverage and performance while managing antenna resources efficiently across multiple wireless standards.
2Productivity
If antenna ports are shared across multiple component carriers and wireless standards, then resource utilization is improved, but signal quality and transmission reliability may deteriorate
Solution Approach 1:
The patent applies local quality by determining preferred antenna ports separately for each component carrier based on downlink measurements. Instead of uniformly sharing antenna ports, the system evaluates measurement results (such as RSRP) for each carrier and assigns antenna ports locally optimized for that specific carrier's signal conditions, thereby maintaining signal quality while achieving resource utilization.
3Reliability
If downlink measurements are performed to determine preferred antenna ports, then uplink transmission performance is improved, but measurement and computation overhead increase
Solution Approach 1:
The patent implements preliminary action by performing downlink measurements and determining preferred antenna ports in advance before uplink transmission. The system measures downlink reference signals from multiple antenna ports, identifies the preferred ports based on measurement results, and pre-configures the mapping between antenna ports and component carriers. This preliminary configuration reduces real-time computation overhead during actual uplink transmission.
Data Source
AI summary
A wireless device may comprise antennas and a processor configured to cause the wireless device to determine preferred antenna ports for at least one primary component carriers (PCCs) and at least one secondary component carriers (SCCs) based on performed downlink measurements of antenna ports. The wireless device may further determine support capabilities of the wireless device and perform computations using additional measurements of the antenna ports. Based on the computations, the wireless device may assign the preferred antenna ports to the PCCs and SCCs and perform uplink transmission using the assigned antenna ports.