  The reconfigurable intelligent surface is a promising technology for the
manipulation and control of wireless electromagnetic signals. In particular, it
has the potential to provide significant performance improvements for wireless
networks. However, to do so, a proper reconfiguration of the reflection
coefficients of unit cells is required, which often leads to complex and
expensive devices. To amortize the cost, one may share the system resources
among multiple transmitters and receivers. In this paper, we propose an
efficient reconfiguration technique providing control over multiple beams
independently. Compared to time-consuming optimization techniques, the proposed
strategy utilizes an analytical method to configure the surface for multi-beam
radiation. This method is easy to implement, effective and efficient since it
only requires phase reconfiguration. We analyze the performance for indoor and
outdoor scenarios, given the broadcast mode of operation. The aforesaid
scenarios encompass some of the most challenging scenarios that wireless
networks encounter. We show that our proposed technique provisions sufficient
improvements in the observed channel capacity when the receivers are close to
the surface in the indoor office environment scenario. Further, we report a
considerable increase in the system throughput given the outdoor environment.
