Patent ID: 11956307
Assignee: CHONGQING UNIVERSITY OF POSTS AND TELECOMMUNICATIONS
Field: Digital communication (Electrical engineering)
Classification: CPC H  Y | IPC H

Claim 8:
9. The distributed task offloading and computing resources management method based on energy harvesting according to claim 1, wherein the optimal size b*ij(t) of tasks offloaded by an i-th mobile device to the mobile edge computing server in a time slot t is expressed as:, b
    ij
    *
   
   (
   t
   )
  
  =
  
   {
   
    
     
      
       
        
         b
         ij
         L
        
        (
        t
        )
       
       ,
       
        
         
          b
          ij
          M
         
         (
         t
         )
        
        ≤
        
         
          b
          ij
          L
         
         (
         t
         )
        
       
      
     
    
    
     
      
       
        
         b
         ij
         M
        
        (
        t
        )
       
       ,
       
        
         
          b
          ij
          L
         
         (
         t
         )
        
        ≤
        
         
          b
          ij
          M
         
         (
         t
         )
        
        ≤
        
         
          b
          ij
          U
         
         (
         t
         )
        
       
      
     
    
    
     
      
       
        
         b
         ij
         U
        
        (
        t
        )
       
       ,
       
        
         
          b
          ij
          M
         
         (
         t
         )
        
        ≥
        
         
          b
          ij
          U
         
         (
         t
         )
        
       
      
     
    
   
  
 

 
  
   
    where
    ⁢
       
    
     
      b
      ij
      M
     
     (
     t
     )
    
   
   =
   
    
     
      ρ
      i
     
     C
    
    -
    1
   
  
  ,
 

 
  
   C
   =
   
    
     
      φ
      ij
     
     ⁢
     ln
     ⁢
       
     2
    
    +
    
     
      
       p
       ij
      
      (
      t
      )
     
     ⁢
     ln
     ⁢
       
     2
    
    -
    
     
      
       ln
       ⁢
         
       2
      
      
       V
       i
      
     
     ⁢
     
      (
      
       
        
         Q
         i
        
        (
        t
        )
       
       +
       
        
         
          
           B
           ~
          
          i
         
         (
         t
         )
        
        ⁢
        
         
          P
          i
         
         
          r
          i
         
        
       
      
      )
     
    
   
  
  ,, pij(t) represents a quotation of a j-th mobile edge computing server for the i-th mobile device, Qi(t) represents a a task queue backlog of the i-th mobile device, Vi represents a non-negative controllable parameter, φij represents unit communication cost from the i-th mobile device to the j-th mobile edge computing server in the time slot t, {tilde over (B)}i(t) represents a virtual energy queue of the battery of the i-th mobile device, Pi represents a transmission power in the time slot t, ri represents a transmission rate of the i-th mobile device, bijL(t) represents the smallest size of offloading tasks with an energy constraint, and bijU(t) represents the maximum size of offloading tasks with the energy constraint.