Slow-Loop Resource Reservation for Millimeter Wave Beamforming
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Solution Overview
Problem
Current wireless communication systems, particularly those using millimeter wave frequencies, face challenges with high path loss and short range, leading to inefficiencies in beamforming and resource allocation, resulting in conflicts and reduced network throughput due to the use of directional antennas.
Innovation Solution
A method for determining a preferred beamforming direction and negotiating resource reservations through a slow-loop resource reservation procedure, which involves a UE transmitting a scheduling request and receiving responses to manage transmission opportunities (TxOPs) and avoid conflicts with neighboring devices, thereby optimizing beamforming and resource allocation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If directional antennas are used in millimeter wave frequency bands, then communication range and signal strength are improved, but conflicts between neighboring devices increase and network throughput decreases
Solution Approach 1:
The patent implements a two-stage resource reservation mechanism where devices first perform fast-loop reservations for immediate transmission opportunities, then engage in slow-loop negotiations for longer-term resource allocation. This preliminary action prevents conflicts before they occur by establishing reserved transmission slots in advance, allowing directional antennas to maintain signal strength without causing interference to neighboring devices.
Solution Approach 2:
The patent introduces a scheduling request/response mechanism as an intermediary negotiation process between neighboring devices. Before actual data transmission begins, devices exchange scheduling requests and responses to coordinate their directional beam transmissions, ensuring that high-gain directional antennas do not cause conflicts with adjacent device communications.
2Productivity
If resource allocation is optimized for directional beamforming, then communication efficiency is improved, but conflicts with neighboring devices increase
Solution Approach 1:
The patent segments resource allocation into multiple time-based stages: fast-loop transmission opportunities for immediate high-efficiency communication, and slow-loop negotiation periods for coordinating with neighboring devices. This segmentation allows the system to achieve high communication efficiency during designated slots while preventing interference to neighbors during coordination phases.
Solution Approach 2:
The patent implements dynamic resource adjustment where the fast-loop and slow-loop mechanisms continuously adapt resource allocation based on real-time channel conditions and neighboring device activity. This dynamic approach maintains high communication efficiency when conditions permit while automatically reducing interference when neighboring devices are active.
3Loss of time
If fast-loop transmission opportunities are reserved, then latency is reduced, but resource conflicts increase
Solution Approach 1:
The fast-loop mechanism reserves transmission opportunities in advance through preliminary scheduling, reducing latency by having pre-approved transmission slots ready. The slow-loop mechanism then performs conflict detection and resolution in subsequent negotiation phases, ensuring that the time-sensitive fast-loop transmissions do not create resource conflicts with other devices.
Data Source
AI summary
In an aspect of the disclosure, a method, a computer-readable medium, and an apparatus are provided. The apparatus may determine a preferred beamforming direction for communications with each of a plurality of neighbor UEs. The apparatus may transmit a first scheduling request to a second UE from among the plurality of neighbor UEs. In certain aspects, the first scheduling request may include a first transmission schedule for M transmission opportunities (TxOPs). In certain other aspects, the first transmission schedule may indicate a first set of TxOPs of the M TxOPs reserved by the first UE for communication with the second UE. The apparatus may receive a first scheduling response from the second UE, the first scheduling response indicating whether the second UE accepts or rejects the first scheduling request.