Coordinated Channel State Information Reporting via Sidelink
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Solution Overview
Problem
Existing wireless communication systems face challenges in accurately reporting channel state information (CSI) across multiple devices, leading to inefficiencies in scheduling and network throughput.
Innovation Solution
The proposed solution involves coordinating CSI reporting between two or more wireless devices, allowing them to exchange information via sidelink wireless links to select optimal analog and digital beam configurations, thereby increasing the likelihood of co-scheduling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If wireless devices independently report channel state information, then each device can make its own scheduling decisions, but scheduling conflicts and delays increase due to beam configuration incompatibilities
Solution Approach 1:
Multiple wireless devices coordinate their channel state information reporting by merging their individual CSI reports into a unified coordinated report. This allows the network to treat multiple devices as a coordinated group, enabling multi-user scheduling that would not be possible with independent reporting, thereby reducing scheduling delays and improving throughput.
Solution Approach 2:
Wireless devices perform preliminary coordination before actual data transmission by exchanging channel state information and negotiating beam configurations in advance. This preliminary action allows the network to pre-configure scheduling parameters and beam directions, eliminating scheduling conflicts and reducing delays during actual data transmission.
2Productivity
If wireless devices coordinate their channel state information reporting, then scheduling efficiency improves, but device complexity increases due to additional coordination protocols
Solution Approach 1:
The coordination protocol is designed to be universally applicable across different wireless devices and network configurations. The same basic coordination mechanism works for various scenarios (single-user mode, multi-user mode, different beam configurations), allowing devices to gain scheduling efficiency without implementing device-specific complex protocols.
Solution Approach 2:
The system incorporates feedback mechanisms where devices receive acknowledgment and scheduling decisions from the network based on their coordinated CSI reports. This feedback loop allows devices to learn from previous coordination attempts and adjust their reporting strategies, reducing the complexity of manual coordination while improving scheduling efficiency over time.
3Measurement precision
If wireless devices exchange channel state information via sidelink, then beam selection accuracy improves, but energy consumption increases
Solution Approach 1:
Instead of devices continuously exchanging full channel state information, the system implements partial action by exchanging only the necessary beam selection parameters and coordination signals. This selective information exchange maintains beam selection accuracy while significantly reducing the energy consumption associated with continuous full CSI communication.
Solution Approach 2:
The coordination protocol employs periodic action by exchanging channel state information at specific scheduling intervals rather than continuously. Devices transmit coordination signals and beam selection information periodically based on network requirements, maintaining measurement precision while minimizing energy consumption during non-transmission periods.
Data Source
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AI summary
This disclosure relates to techniques for coordinated channel state information reporting in a wireless communication system. A wireless device may establish a wireless link with a cellular base station. The wireless device may determine to coordinate channel state information reporting with another wireless device. Information may be exchanged with the other wireless device via a sidelink wireless link. The wireless device may provide channel state information to the cellular base station. The channel state information may be determined based at least in part on the information exchanged with the other wireless device via the sidelink wireless link.