Methods for updating system information and wireless transmit/receive units using thereof

Abstract

A method for use in a Wireless Transmit/Receive Unit (WTRU). The method comprises: receiving, using an active receiver, system information comprising a first system information set, wherein the first system information set is currently valid for the WTRU; storing the system information; deactivating the active receiver and activating a passive receiver; determining whether a difference between a first parameter in the BSSI and a first parameter in the first system information set is greater than a threshold value, wherein on a condition that the difference is greater than the threshold value, reactivating the active receiver to receive a second system information set as a currently valid system information set for the WTRU.

What is claimed: 
     
         1 . A method for updating system information by a Wireless Transmit/Receive Unit (WTRU), comprising:
 receiving, using an active receiver, system information comprising a first system information set, wherein the first system information set is currently valid for the WTRU;   deactivating the active receiver and activating a passive receiver;   receiving a basic set of system information (BSSI) using the passive receiver; and   reactivating the active receiver to receive a second system information set as a currently valid system information set for the WTRU based on a comparison of a threshold value with a difference between a parameter in the BSSI and a parameter in the first system information set.