CONTENTS

 1     Introduction     
 2     Power savings requirements       
        2.1     Survey results        
        2.2     EU Code of Conduct on Energy Consumption     
        2.3     Requirements profile summary     
 3     Classification of power saving techniques          
        3.1     Taxonomy 
        3.2     Unified approach to ONU power saving signalling           
 4     Power saving maintenance mechanisms 
        4.1     Fast Sleep power saving technique            
        4.2     Deep Sleep power saving technique          
        4.3     Dozing power saving technique    
        4.4     Power shedding     
        4.5     OMCI control of the power saving techniques      
 5     Signalling of ONU operations in a power saving mode  
        5.1     Modified Dying Gasp PLOAM Signalling
        5.2     PLOAM-based signalling  
        5.3     OMCI-based signalling     
        5.4     Extended power shedding 
        5.5     Implicit power save mode signalling         
        5.6     Security aspect of power save mode signalling     
 6     Comparative analysis      
        6.1     Methodology         
        6.2     Power save mode signalling discussion    
        6.3     Power save mode maintenance discussion
 7     Conclusions     
Appendix I – Power survey results    
        I.1        Power survey No.1 responses (LF08)    
        I.2        Power survey No. 2 responses    
        I.3          Power survey No. 3 responses