Dynamic Antenna Selection for Uplink Resource Mapping
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Solution Overview
Problem
Current user equipment (UE) in wireless communication systems often default to primary antennas for uplink communications, even if secondary antennas offer better performance, due to infrequent measurement of channel metrics and failure to account for variations in the communication medium, leading to suboptimal antenna selection.
Innovation Solution
The UE receives an uplink resource allocation and maps subsets of resource blocks to one or more antennas based on determined downlink channel characteristics such as SNR, SINR, or RSSI, allowing for dynamic selection of the best antenna for uplink transmissions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the UE defaults to using the primary antenna for uplink communications, then the device complexity is reduced and ease of operation is improved, but the uplink communication performance deteriorates when secondary antennas offer better channel characteristics
Solution Approach 1:
The patent implements dynamic antenna selection where the UE transitions from a static primary antenna default to a dynamic selection process. The UE measures downlink channel characteristics (SNR, SINR, RSSI) for each antenna and dynamically selects the antenna with the best characteristics for uplink transmissions, allowing the system to adapt to varying channel conditions and maximize throughput.
Solution Approach 2:
The patent employs feedback mechanisms where the UE continuously measures downlink channel characteristics and uses this feedback information to make informed antenna selection decisions. The measured channel metrics serve as feedback that guides the selection of the optimal antenna for uplink communications, ensuring the system responds to actual channel conditions.
2Device complexity
If the UE measures channel metrics infrequently, then the measurement complexity and processing overhead are reduced, but the antenna selection accuracy deteriorates due to failure to account for variations in the communication medium
Solution Approach 1:
The patent implements periodic measurement of downlink channel characteristics at specific intervals (e.g., every downlink transmission). This periodic action ensures the UE has up-to-date channel information without requiring continuous measurement, balancing measurement overhead with the need for accurate channel characteristics to guide antenna selection.
3Use of energy by moving object
If the UE uses a single primary antenna for all uplink transmissions, then the device complexity is reduced and power consumption is minimized, but the reliability of uplink communications deteriorates when channel conditions favor other antennas
Solution Approach 1:
The patent enables dynamic antenna selection based on real-time channel measurements, allowing the UE to switch between antennas to maintain reliable communications. By selecting the antenna with the best downlink channel characteristics for each uplink transmission, the system adapts to varying channel conditions and maintains reliability without requiring all antennas to operate continuously, thus managing power consumption effectively.
Data Source
AI summary
Methods, systems, and devices are described for mapping, by a UE, uplink transmissions to one or more antennas of the UE. In one aspect, a UE may receive an uplink resource allocation identifying a set of resource blocks (RBs) from a base station. The UE may map subsets of the set of RBs to one or more of a plurality of antennas of the UE and transmit one or more uplink transmissions, using the subsets of the set of resource blocks, on the one or more antennas based at least in part on the mapping. Additionally, in some aspects, the UE may determine channel characteristics or CSI associated with the downlink from the base station and base the mapping of subsets of RBs to one or more antennas of the UE on the determined channel characteristics/CSI.