Ultra Mobile broadband (UMB) marks the first world IP-based mobile broadband standard to enable peak download data rates of 288 Mbps in a 20 MHz bandwidth, while preserving large economies of scope and scale.UMB is believed to represents a major break-through in next generation mobile broadband services by enabling the transfer of native IP, variable length, data packets at speeds that are orders of magnitude higher than what is commercially available today on the global market. Designed from the ground up to improve the overall end user experience and strengthen an operators earnings potential as a latest member of the family of CDMA2000 standards.
UMB is the leading Orthogonal Frequency Division Multiple Access (OFDMA) solution, using sophisticated control and signaling mechanisms, radio resource management (RRM), adaptive reverse link (RL) interference management, and advanced antenna techniques, such as Multiple Input Multiple Output (MIMO), Space Division Multiple Access (SDMA) and beamforming. Ultra Mobile broadband (UMB)solution universally addresses a large cross-section of advanced mobile broadband services and it does so by economically delivering low-rate, low latency voice traffic at one end of the spectrum, just as efficiently as ultrahigh- speed, latency insensitive, broadband data traffic at the other.
In order to support ubiquitous and universal access, UMB supports inter-technology hand-offs and seamless operation with existing CDMA2000 1X and 1xEV-DO systems.This simply means integrating and optimizing these and other advanced radio access techniques into a single, open, global standard represents a major technological breakthrough within the mobile communications industry. Thus, the UMB solution delivers a compelling user experience based on the strongest performance and economic value proposition available within the wireless industry and is being seen as a candidate for the 4G networks.
In this thesis, we make three major proposals , Firstly we propose power minimization in the uplink under MIMO or Beamforming. We are fully aware that battery life of a mobile user is critical in the Uplink. With this in mind, given a specific data rate that the user must transmit with the possibility of using either MIMO or Beamforming we need to determine which of the two systems will minimize the total transmit power and will be optimal for the user in section 4.1. Secondly we propose throughput maximization in the downlink under MIMO or Beamforming. In Ultra Mobile Broadband systems a higher system throughput is expected due to the sophisticated antenna systems included. Meaning the system is able to achieve under multiuser a higher system throughput by considering the power constraints available at the base station 4.2. Thirdly we propose a MIMO ,Beamforming Switching Algorithm [MBSSA], an efficient higher system throughput switching algorithm between MIMO and Beamforming. The algorithm seeks to maximize the system throughput by iteratively considering the optimal conditions for MIMO and beamforming ,then applying them to the respective users in the system according to their QoS demands 4.3.
