Sidelink CSI Reporting via Random Access and Grant Reuse
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently managing sidelink channel state information (CSI) reporting, particularly in scenarios involving vehicle-to-everything (V2X) communications, which affect the performance of 4G and 5G networks.
Innovation Solution
The proposed solution involves implementing mechanisms for sidelink CSI reporting through random access procedures, including beam failure recovery and sidelink buffer status reporting (BSR), utilizing existing communication protocols to enhance the reporting process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If random access procedures are used for sidelink CSI reporting, then reporting reliability is improved, but access delay increases
Solution Approach 1:
The patent applies preliminary action by pre-configuring uplink resources for sidelink CSI reporting before they are needed. The network configures dedicated uplink resources and parameters in advance, so when CSI reporting is required, the UE can immediately use these pre-allocated resources without going through random access procedures, thus maintaining reliability while avoiding access delay.
2Productivity
If dedicated uplink resources are allocated for sidelink CSI reporting, then reporting efficiency is improved, but resource overhead increases
Solution Approach 1:
The patent applies dynamics by making uplink resource allocation adaptive rather than static. The network dynamically allocates dedicated uplink resources for sidelink CSI reporting based on actual needs, traffic conditions, and channel state. Resources are configured only when and where needed, allowing the system to achieve high reporting efficiency while minimizing resource overhead through flexible, condition-based allocation.
3Reliability
If beam failure recovery procedures are implemented, then connection reliability is improved, but procedure complexity increases
Solution Approach 1:
The patent applies the extraction principle by separating beam failure recovery procedures into independent, modular components. The recovery process is extracted as a distinct procedure with dedicated resource configurations and separate from normal CSI reporting. This modularization reduces overall system complexity by isolating the complex recovery logic into manageable, standalone elements that can be executed independently when needed.
Data Source
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AI summary
A method for a wireless device is described herein. In one example, the method includes receiving - by a first wireless device and from a base station - configuration parameters of: a first scheduling request for a sidelink channel state information (SL-CSI) report medium access control (MAC) control element (CE), and a second scheduling request for uplink transmissions to the base station. The method further includes triggering - by a first wireless device - the first scheduling request for the SL-CSI report transmission to a second wireless device; initiating - by the first wireless device and in response to the triggering the first scheduling request for the sidelink resource - a random access procedure based on no physical uplink control channel (PUCCH) resource being available; transmitting - by the first wireless device to a base station - a preamble in response to the initiating; transmitting, by the first wireless device - the SL-CSI report MAC CE to the second wireless device and via a sidelink grant received from the base station; and stopping - by the first wireless device - the random access procedure, ongoing between the first wireless device and the base station, in response to the transmitting to the second wireless device the SL-CSI report MAC CE via the sidelink grant.