Orthogonal Resource Allocation for Wireless Interference
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Solution Overview
Problem
Local area wireless networks face interference issues due to uncoordinated deployments and shared frequency and time slots among network devices, particularly in LTE-A systems, leading to uplink-to-downlink and downlink interferences.
Innovation Solution
The solution involves synchronizing resources in both the time and frequency domains to share overlapping frequency bands and time slots, and orthogonalizing signals to minimize interference from neighboring network devices, using a resource module and transceiver to allocate and manage these synchronized resources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If resources are shared and synchronized among network devices in local area wireless networks, then bandwidth utilization is improved, but interference between network devices increases
Solution Approach 1:
The patent segments the shared resource into multiple orthogonal sub-resources through resource partitioning. Each network device is allocated specific orthogonal resources (different time slots, frequency channels, or code sequences) within the shared resource block, allowing simultaneous operation without mutual interference while maintaining efficient bandwidth utilization.
Solution Approach 2:
The patent introduces a resource allocation mechanism as an intermediary that coordinates between network devices. This intermediary assigns orthogonal resource partitions to different devices based on their transmission requirements, enabling resource sharing while preventing interference through structured allocation decisions.
2Adaptability or versatility
If dynamic time division duplex switching points are used for resource allocation, then adaptability to different network conditions is improved, but interference between uplink and downlink transmissions increases
Solution Approach 1:
The patent segments the TDD resource into multiple orthogonal sub-resources with distinct uplink and downlink designations. By partitioning the time-frequency space into separate orthogonal blocks for different directions, the system maintains dynamic adaptability while preventing uplink-downlink interference through spatial separation of transmission directions.
Solution Approach 2:
The patent applies asymmetric resource allocation where uplink and downlink resources are differentiated through orthogonal characteristics. The allocation pattern is not symmetric but rather asymmetrically designed to ensure that uplink transmissions and downlink transmissions occupy orthogonal spaces, eliminating mutual interference while preserving network adaptability.
Data Source
AI summary
In accordance with an example embodiment of the present invention, an apparatus is disclosed that includes a resource module configured to allocate a first resource and a second resource that are at least partially synchronized in at least one of a time domain and a frequency domain in such a way that the first resource and the second resource share at least one of an overlapping frequency band and a same time slot. The apparatus also includes a transceiver configured to transmit a first signal on the first resource and receive a second signal on the second resource, wherein at least one of the first signal and the second signal is at least partially orthogonalized with respect to a third signal that is transmitted on one of the first resource and the second resource from a neighbor network device.