Patent ID: 11863424
Assignee: SAGEMCOM ENERGY & TELECOM SAS
Field: Digital communication (Electrical engineering)
Classification: CPC H  Y | IPC H

Claim 3:
4. The method according to claim 1, wherein said link cost LCi→j[m] in the forward direction, and respectively LCj→i[m] in the backward direction, for a powerline frequency band is calculated as follows:, L
    ⁢
    
      
        C
        
          i
          →
          j
        
      
      ⁡
      
        [
        m
        ]
      
    
  
  =
  
    
      a
      ⁢
      d
      ⁢
      p
      ⁢
      K
      ⁢
      r
      *
      
        MOD
        Kr
      
    
    +
    
      a
      ⁢
      d
      ⁢
      p
      ⁢
      K
      ⁢
      m
      *
      
        MOD
        
          K
          ⁢
          m
        
      
    
    +
    
      adp
      ⁢
      K
      ⁢
      
        c
        ⁡
        
          [
          m
          ]
        
      
      *
      
        
          (
          
            
              
                
                  MaximumNumberOfTones
                  -
                
              
            
            
              
                NumberOfActiveTones
              
            
          
          )
        
        MaximumNumberOfTones
      
    
    +
    
      adpKq
      *
      
        MAX
        (
        
          0
          ,
          
            MIN
            (
            
              1
              ,
              
                
                  
                    a
                    ⁢
                    d
                    ⁢
                    p
                    ⁢
                    H
                    ⁢
                    i
                    ⁢
                    g
                    ⁢
                    hLQIVal
                    ⁢
                    u
                    ⁢
                    e
                  
                  -
                  LQI
                
                
                  
                    
                      
                        adpHighLQIValue
                        -
                      
                    
                  
                  
                    
                      adpLowLQIValue
                    
                  
                
              
            
            )
          
        
        )
      
    
  

where MODKr=1 for a robust mode, 0 for other modulations, a modulation according to said robust mode comprising successively a Reed-Solomon coding, a convolutional coding, a code repetition coding and a BPSK modulation;
MODKm is equal to 3 for Differential Binary Phase Shift Keying (DBPSK) or Binary Phase Shift Keying (BPSK) modulations including said robust mode, is equal to 2 for Differential Quadrature Phase Shift Keying (DQPSK) or Quadrature Phase Shift Keying (QPSK) modulations, is equal to 1 for Eight-Ary Differential Phase-Shift Keying (D8PSK) or Eight-Phase Shift Keying (8-PSK) modulations and 0 for 16-State Quadrature Amplitude Modulation (16-QAM) modulations;
adpKr, adpKm, adpKq are weighting factors;
adpKc[m] is a weighting factor defined per frequency band;
LQI is a value representing a quality of a link in the forward direction between the node i and j;
adpHighLQlValue and adpLowLQIValue are threshold values;
MaximumNumberOfTones is a number of sub-carriers available;
NumberOfActiveTones is a number of active sub-carriers.