System and method for self-optimized uplink power control in a fixed wireless backhaul network

摘要

A system and method of uplink power control in a fixed wireless backhaul network, wherein determining an uplink transmit power of each remote backhaul module (RBM) comprises obtaining an interference-over-thermal (IoT) noise value of each hub, determining a target IoT noise value for each RBM, determining a total path loss from each RBM to its serving hub, determining a target uplink carrier to interference and noise ratio (CINR) for the RBM, and computing the RBM uplink transmit power for each RBM by summing the target IoT noise value for the RBM, the total path loss of the RBM to its serving hub, and the target uplink CINR. Computationally expensive parameter sweeps are avoided. The method can be implemented using a centralized processing unit or distributed processing at each node. The method is self-optimizing, and initial hub and RBM transmit powers and other data may be estimated using pre-deployment tools.

主权项

1. A method of uplink power control in a fixed wireless backhaul network comprising a plurality of nodes, wherein each node comprises at least one hub module, and each hub module serves one or more remote backhaul modules (RBMs) through hub-RBM radio links, the method comprising performing, in one or more processing units of the network, the steps of:
in a parameter training phase: determining an initial transmit power for each hub and for each RBM; issuing commands to each hub comprising an initial transmit power for each hub; issuing commands to each RBM comprising an initial transmit power for each RBM; obtaining data comprising: a serving path loss (PL) from each hub to each served RBM, a downlink (DL) carrier to interference noise ratio (CINR) for each RBM, and interference-over-thermal (IoT) noise value for each hub; reporting said data to a processing unit and storing said data in storage means accessible to the processing unit; determining from said data a target IoT for each RBM; and in a parameter application phase: computing from said data an uplink transmit power for each RBM, wherein the uplink transmit power PTXSON-PC for each RBM is computed as:
PTXSON-PC=max{min{Pmax, CINRDL+IoT,targetdB+PLserv}, Pmin}where
IoT,targetdB is the target IoT of the serving hub; CINRDL is the downlink received CINR; PLserv is the pathloss from the RBM to its serving hub; Pmin is the minimum per-tone transmit power; pmax is the maximum per-tone transmit power; and issuing a command comprising a respective uplink transmit power update to each RBM; configuring each RBM to transmit at said respective uplink transmit power.