Patent Number: 8,792,577

Title: Method and apparatus for medium access control in a wireless broadband system with multiple-input multiple-output or multiple-input single-output technology with multiuser capabilities

Abstract: Method and apparatus for medium access control in a wireless broadband system with multiuser MIMO/MISO technology comprising the steps of a transmitter (Tx) broadcasting a polling message (1) to all the users (Rx.sub.1 . . . Rx.sub.i . . . RX.sub.N) associated to said transmitter (Tx); the users answering with reply messages (2) during a time slot (6.sub.1 . . . 6.sub.m) randomly selected from a plurality of time slots in which a period of time dedicated to sending reply messages (5) is divided; the transmitter (Tx) performing a scheduling and transmission of data (3); and scheduled users sending Acknowledgment messages (4). Preferably, only users which measure a Signal to Noise plus Interference Ratio over a pre-defined threshold for a transmission beam send reply messages (2).

Inventors: Verikoukis; Christos (Castelldefels, ES), Zorba Barah; Nizar (Amman, JO), Kartsaki; Elli (Castelldefels, ES), Zarate; Luis Alonso (Castelldefels, ES)

Assignee: Fundacio Privada Centre Tecnologic de Telecomunicions de Catalunya

International Classification: H04B 7/02 (20060101)

Expiration Date: 7/29/12018