CSI-RS Port Muting Feedback for Lower UE Measurement Energy
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Solution Overview
Problem
Existing wireless communication systems face inefficiencies in network energy consumption and resource utilization due to unnecessary CSI-RS measurements and measurements on muted ports, leading to increased power consumption and reduced resource efficiency.
Innovation Solution
Implementing a CSI-RS port muting mechanism in wireless devices, where lower-layer signaling indicates which ports to mute, allowing devices to omit measurements and utilize freed resources for other purposes such as data transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the network node uses full configuration with maximum number of TX/RX ports to support maximum WD capability, then the network can support maximum throughput and coverage, but the network power consumption increases
Solution Approach 1:
The patent implements dynamic antenna port muting where the network node can activate or deactivate specific antenna ports based on current traffic conditions and user requirements. This allows the system to transition from a static full-configuration state to a dynamic state where resources are adjusted in real-time, reducing power consumption when maximum capability is not needed while maintaining the ability to scale up when required.
Solution Approach 2:
The patent applies local quality by selectively muting specific antenna ports rather than deactivating the entire antenna array. This allows different parts of the antenna system to have different operational states - some ports remain active to maintain coverage and support users, while others are muted to reduce power consumption, creating a non-uniform operational pattern optimized for current conditions.
2Measurement precision
If the network node transmits more CSI-RS for increased number of TX/RX ports, then signal detection accuracy improves, but power consumption and resource utilization worsen
Solution Approach 1:
The patent extracts and removes the transmission of CSI-RS on muted antenna ports. By identifying which ports are muted and excluding them from CSI-RS transmission, the system eliminates unnecessary reference signal transmissions that would consume power and resources without providing useful measurement data, since muted ports do not transmit useful signals anyway.
Solution Approach 2:
The patent applies partial action by transmitting CSI-RS only on the subset of active antenna ports rather than on all configured ports. This partial transmission is sufficient to provide accurate channel state information for the actually transmitting ports, avoiding the excessive action of transmitting CSI-RS on ports that are muted and not contributing to signal transmission.
3Reliability
If the wireless device measures all configured CSI-RS ports, then measurement completeness is maintained, but device energy consumption increases
Solution Approach 1:
The patent implements feedback by providing port muting indication from the network node to the wireless device. This feedback mechanism allows the device to receive information about which antenna ports are muted and adjust its measurement behavior accordingly. The device uses this feedback to skip measurements on muted ports while maintaining measurement completeness on active ports, optimizing energy consumption.
4Loss of energy
If the network node mutes antenna ports to reduce power consumption, then energy efficiency improves, but measurement accuracy on muted ports becomes unreliable
Solution Approach 1:
The patent applies preliminary action by notifying the wireless device in advance about which antenna ports will be muted through port muting indication. This allows the device to proactively adjust its measurement configuration before the muting takes effect, skipping measurements on muted ports and avoiding the generation of unreliable measurement data, thereby maintaining overall measurement reliability.
Data Source
AI summary
A method, system and apparatus are disclosed. A network node is provided which is configured to transmit a first signaling to the WD, the first signaling including a first channel state information reference signal, CSI-RS, measurement configuration, the first CSI-RS measurement configuration indicating a first plurality of ports to measure, transmit of a second signaling to the WD, the second signaling including a CSI-RS port muting pattern indication muting at least one muted port of the first plurality of ports and enabling the WD to utilize a modified CSI-RS measurement configuration for feedback reporting, and, receive, from the WD, at least one CSI-RS measurement report for at least one CSI-RS measurement on at least one port of the plurality of ports using the modified CSI-RS measurement configuration and omitting measurements on the at least one muted port.