SYSTEM AND METHOD FOR RECEPTION MODE SWITCHING IN DUAL-CARRIER WIRELESS BACKHAUL NETWORKS

摘要

A system and method for reception mode switching in a dual-carrier fixed wireless backhaul network is disclosed. The primary carrier is a licensed band. The secondary carrier may be an unlicensed or shared carrier. Multi-mode Remote Backhaul Modules (RBMs) comprise a first RF chain with antenna elements for RX/TX on the primary carrier and a second RF chain with antenna elements for RX/TX on the secondary carrier. The Multi-mode RBMs adaptively switch from one reception mode to another with resource borrowing of RF and antenna elements, e.g. the secondary carrier RF chain and antenna elements can be borrowed for the primary carrier, for better reception capability for the primary carrier, reducing the number of link-budget and interference-challenged RBMs, and improving system performance. The system may comprise a dual carrier and single carrier MIMO system with variable antenna topology, having flexibility to switch dynamically between different operational modes depending on performance metrics.

主权项

1. A method for reception mode switching in a dual-carrier fixed wireless backhaul network comprising a plurality of nodes, said nodes comprising a plurality of Hub modules, each serving one or more remote backhaul modules (RBMs) through Hub-RBM radio links, the method comprising deploying RBMs which are selectively operable in plurality of reception modes (multi-mode RBMs) using a primary carrier and/or a secondary carrier, wherein each multi-mode RBM comprises first and second Radio Frequency (RF) chains, the first RF chain comprising RF hardware and antenna elements for receiving and transmitting (RX/TX) on the primary carrier and the second RF chain comprising RF hardware and antenna elements for RX/TX on the secondary carrier or for RX on the primary carrier;
in a data collection phase: obtaining baseline performance measurements for each RBM operating in a baseline reception mode, using the first RF chain for RX/TX on the primary carrier, identifying from said performance measurements interference-challenged or link budget-challenged RBMs, for each interference-challenged or link budget-challenged RBMs obtaining further performance measurements for each of one or more other RBM reception modes; in a parameter selection phase: based on said baseline performance measurements and further performance measurements for each interference-challenged RBM or link budget-challenged RBM, selecting a reception mode which provides a performance gain relative to the baseline reception mode (improved system performance); in a parameter application phase: for each interference-challenged RBM or link budget-challenged RBM, switching to a respective selected reception mode.