Mobile Backhaul Beam Search Using GPS Distance Adaptation
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Solution Overview
Problem
The mmWave band-based wireless backhaul technology faces challenges with high path loss and atmospheric attenuation, leading to restrictions on long-distance communication and increased time for initial backhaul link setup due to narrow beam widths.
Innovation Solution
A method for setting up a mobile backhaul link involves calculating separation distance using GPS position information, selecting appropriate beam width and search scheme, transmitting beam IDs, and determining the beam with the strongest signal strength for link setup, while managing the link by comparing signal strength with threshold values and adjusting beam width and search scheme based on distance changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If beamforming technology using narrow beam is used to overcome path loss restriction, then long-distance communication capability is improved, but time required for initial backhaul link setup increases
Solution Approach 1:
The hub performs preliminary actions by calculating the separation distance between itself and the mobile terminal using GPS position information before initiating beam search. Based on this pre-calculated distance, the hub selects appropriate beam width and beam search scheme in advance, which streamlines the subsequent link setup process and reduces time consumption.
Solution Approach 2:
The system dynamically adjusts beam parameters (beam width and beam search scheme) based on the calculated separation distance. By changing these parameters according to the actual distance between hub and terminal, the system optimizes both communication range and setup speed, resolving the contradiction between long-distance capability and setup time.
2Productivity
If mmWave band is used for wireless backhaul technology, then high-speed and high-reliability transmission is improved, but path loss and atmospheric attenuation increase
Solution Approach 1:
The system changes beam parameters (beam width, beam search scheme) based on the separation distance calculated from GPS position information. This dynamic parameter adjustment allows the system to adapt to varying path loss conditions while maintaining high-speed transmission capabilities in the mmWave band.
Solution Approach 2:
The mobile terminal provides feedback by measuring and reporting the signal strength of received beams. The hub uses this feedback information to select the optimal beam for establishing the backhaul link, ensuring reliable communication while compensating for path loss and atmospheric attenuation.
Data Source
AI summary
A method for setting up a mobile backhaul link, performed by a hub in a mobile backhaul system, may comprise: calculating a separation distance between the hub and a mobile backhaul terminal using GPS position information; selecting a beam width and a beam search scheme of at least one beam to be used for setting up the mobile backhaul link according to the separation distance; transmitting ID(s) of the at least one beam to the mobile backhaul terminal through the at least one beam having the beam width according to the beam search scheme; receiving the ID(s) of the at least one beam and a measurement result of the at least one beam from the mobile backhaul terminal; and selecting a first beam having a largest signal strength according to the measurement result, wherein the first beam is used for setting up the mobile backhaul link.