Partial Antenna Uplink Sounding for SRS Resource Efficiency
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Solution Overview
Problem
In wireless communication systems, using all available antenna ports for uplink sounding by UEs can lead to inefficient resource consumption, limiting the number of UEs that a network entity can support within a cell and reducing interference mitigation capabilities.
Innovation Solution
UEs transmit a capability message indicating a subset of available antenna ports for uplink sounding, allowing the network entity to control which ports are used via signaling, thereby reducing resource consumption and enabling support for more UEs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If UEs use all available antenna ports for uplink sounding, then channel quality estimation accuracy is improved, but resource consumption increases and the number of supported UEs decreases
Solution Approach 1:
The patent applies partial action by enabling UEs to transmit SRS using only a subset of antenna ports rather than all available ports. The network entity configures which specific ports are activated for sounding, allowing partial utilization of antenna resources. This reduces the total number of SRS transmissions across all UEs while maintaining sufficient channel quality estimation accuracy, thereby increasing the number of UEs that can be supported within the same resource constraints.
2Measurement precision
If UEs use all available antenna ports for uplink sounding, then channel quality estimation accuracy is improved, but resource consumption increases
Solution Approach 1:
The network entity configures a subset of antenna ports for SRS transmission rather than requiring all ports to be used. This partial action approach reduces the total number of SRS transmissions across all UEs, thereby decreasing uplink resource consumption and energy usage while maintaining adequate channel quality estimation accuracy for effective resource scheduling and beam management.
3Measurement precision
If all antenna ports are used for uplink sounding, then channel quality estimation is improved, but interference mitigation capability is reduced
Solution Approach 1:
By activating only a configured subset of antenna ports for SRS transmission rather than all ports, the patent reduces the total number of simultaneous transmissions in the uplink. This partial utilization of antenna resources decreases inter-UE interference and improves the network's ability to mitigate harmful interference, while still maintaining sufficient channel quality estimation accuracy for effective resource scheduling and beam management decisions.
Data Source
AI summary
Methods, systems, and devices for wireless communications are described. A user equipment (UE) may transmit a first capability message to a network entity indicating that the UE may be capable of using a subset of antenna ports of a set of antenna ports for uplink sounding on a wireless band. Further, one or more antenna ports of the set of antenna ports may be available for the uplink sounding and the first capability message may include an indication of the set of antenna ports. The UE may then receive control signaling from the network entity indicating the subset of antenna ports that the UE should use for the uplink sounding based on the first capability message. As such, as part of the uplink sounding on the wireless band, the UE may transmit one or more sounding reference signals (SRSs) via the subset of antenna ports indicated by the control signaling.