METHODS AND APPARATUS FOR METHOD FOR MAINTAINING A RADIO LINK AT A MOBILE RADIO

摘要

Methods and apparatus are provided for radio link maintenance at a mobile radio in a wireless communication network. The disclosed methods and apparatus help a mobile radio maintain a radio link by regularly monitoring (500) frame synchronization, regularly checking (600) a scrambling sequence of a mobile radio against that of infrastructure equipment, and regularly detecting (700) and/or recovering from fade conditions. In the event the radio link can not be maintained, then the disclosed methods and apparatus will cause the mobile radio to switch to a control channel so that the synchronization, scrambling mismatch and/or fade issues may be corrected. In one implementation, the disclosed methods and apparatus can be implemented at mobile radios in an Association of Public-Safety Communications Officials Project 25 compliant system.