Cooperative Full-Duplex Sidelink Beam Coordination for Self-Interference
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Solution Overview
Problem
Existing wireless communication systems face challenges in managing full-duplex communications due to self-interference and co-channel interference, particularly in device-to-device (D2D) communications, where simultaneous transmission and reception lead to interference issues.
Innovation Solution
Implementing cooperative full-duplex techniques that utilize directional beams for sidelink communications, allowing simultaneous transmission and reception while managing interference by broadcasting parameters such as location, directional beam, and antenna array information to optimize communication paths.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If full-duplex communications are implemented in device-to-device communications, then communication efficiency and spectral utilization are improved, but self-interference and co-channel interference increase
Solution Approach 1:
The patent segments the communication resources by introducing different interference levels (first interference level for transmissions affecting others, second interference level for transmissions not affecting others) and applies different scheduling approaches for each segment. This allows full-duplex operations to proceed while managing interference through differentiated resource allocation.
Solution Approach 2:
The patent changes the parameter of interference level classification by introducing a threshold-based distinction between first and second interference levels. Devices transmit indication information about their interference levels, and the network scheduler uses these parameter changes to make informed scheduling decisions that balance communication efficiency with interference management.
2Reliability
If devices transmit indication information about interference levels, then interference management is improved, but signaling overhead increases
Solution Approach 1:
The patent applies partial action by having devices transmit indication information selectively based on their interference level status. Not all devices need to transmit this information continuously - only those whose interference level status changes or who are relevant to current scheduling decisions. This reduces the overall signaling overhead while maintaining effective interference management.
3Measurement precision
If directional beams are used for sidelink communications, then signal quality is improved, but device complexity increases
Solution Approach 1:
The patent introduces the network device (base station) as an intermediary that receives indication information from multiple devices, processes the interference level data, and makes centralized scheduling decisions. This mediator approach allows directional beams to be used for high signal quality while the complexity of beam management and interference coordination is handled by the network device rather than individual devices.
Data Source
Figure 1
Figure 2A~2B
Figure 2C~2D
AI summary
Methods, systems, and devices for wireless communications are described that provide for cooperative full-duplex techniques for sidelink communications. A first device that supports full-duplex communications may transmit a first message to a second device while concurrently receiving a second message from a third device. The first device may determine a set of parameters that indicate a presence of one or more objects that cause interference at the first device based on communicating with the second and third devices. The set of parameters may include location information, directional beam information, main beam information, and null interference beam information, or velocity information, or any combination thereof. The first device may broadcast an indication of the set of parameters to other devices. In some examples, a device that receives the set of parameters may determine communications parameters for communication with other devices that accounts for the indicated objects.