System and method for supporting multi-user antenna beamforming in a cellular network

摘要

The present invention is a method and system for supporting a beamforming antenna system in a multiple user mobile broadband communication network including a process for setting and adjusting the magnitude and phase of the signal to user equipment from each antenna. Namely, the present invention supports the communication of power signal values or levels to user equipment in a manner that keeps pace with the rapid variations of the power levels that occur in the dynamic scheduling of transmissions on the cell site. The present invention satisfies this need for an improved signal strength signaling to user equipment for the situation where multiple users are located on the cell site.

主权项

1. A method for specifying a power scaling factor for a transmission signal from an access node to a receiver on a communication system that has at least two spatial beams providing coverage in a cell sector, the method comprising:
by the access node,
determining the power scaling factor to be applied to the transmission signal to the receiver, wherein the power scaling factor is determined based on a resource allocation on the cell sector and number of receivers that will be communicated to over the allocated resource, wherein the power scaling factor is calculated using:
a formula −10 log10N, N=1, 2 for a 2 transmitter antenna, wherein a format message further includes an additional bit to specify a number of transmitters transmitting; ora formula −10 log10N, N=1, 2, 3, 4 for a 4 transmitter antenna, wherein the format message further includes an additional two bits to specify a number of transmitters transmitting;preparing the format message based on the power scaling factor determined by the access node, wherein the format message further includes designation bits specifying a transmission mode of a plurality of transmission modes, wherein the plurality of transmission modes comprises multiple user-MIMO, closed loop Rank-1, and closed loop Rank-2;transmitting the format message periodically over one or more spatial beam transmissions, wherein the format message includes information required for calculating; anddynamically adjusting power of the transmission signal to the receiver based on the power scaling factor.