Network Controller Beam Index Allocation for Sidelink Interference
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In high-density vehicle environments, such as heavy traffic or cooperative group communication, sidelink interference among vehicles equipped with multiple antennas and using beamforming techniques limits system capacity and requires effective management.
Innovation Solution
A network controller allocates unique beam indices to each device in a cluster to minimize interference by ensuring each device transmits beamformed signals with a distinct beam reference signal structure, allowing for dynamic allocation and deallocation of beam indices based on received signal strength, phase, and amplitude information, and coordinating with base stations and cloud servers for interference management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If beamforming is used to enhance link reliability in V2V communication, then link reliability is improved, but interference between vehicles with same or overlapped resources increases and system capacity is limited
Solution Approach 1:
The patent changes the parameter of beam reference signal structure by introducing unique beam indices to different devices. Each device is configured with a distinct beam index that determines its beam reference signal structure, allowing the system to maintain beamforming benefits while reducing interference through parameter differentiation
Solution Approach 2:
The patent applies local quality by assigning different beam reference signal structures to different devices based on their specific beam indices. Each device has a unique local configuration for its beam reference signals, which enables differentiated interference management across the network while maintaining overall system reliability
2Object-generated harmful factors
If zone-based resource allocation is used to minimize sidelink interference, then interference is reduced, but system capacity is limited when high density of vehicles exists
Solution Approach 1:
The patent introduces beam indices as an additional parameter dimension for resource differentiation. By configuring devices with unique beam indices that determine their beam reference signal structures, the system can support more devices in high-density scenarios while maintaining interference management, thus increasing system capacity beyond what zone-based allocation alone provides
3Object-generated harmful factors
If unique beam indices are allocated to each device to minimize interference, then interference is reduced, but device complexity increases due to beam index management
Solution Approach 1:
The patent uses the network controller as an intermediary to manage beam index allocation. The network controller receives feedback from devices about beamformed signal characteristics and uses this information to allocate and deallocate beam indices centrally, reducing the complexity burden on individual devices while maintaining effective interference management
Data Source
Figure 1
Figure 2
Figure 3
AI summary
A network controller for controlling beamformed signals that are transmitted by a cluster of devices, the network controller being configured to allocate each device a beam index, which determines a respective beam reference signal structure, to use when transmitting beamformed signals over a sidelink between the devices, and to make that allocation in such a way as to minimise interference between the beamformed signals.