Congestion control in a wireless communication system using the battery level

Abstract

A method for congestion control in the uplink of a wireless communication system having a wireless transmit/receive unit (WTRU) and a radio network controller (RNC) begins by receiving an interference report for each user. The average noise rise for each user calculated and congestion relieving measures are implemented based upon the average noise rise and the WTRU battery level. A method for congestion control in the downlink of a wireless communication system having a WTRU and a RNC begins by receiving a transmission power report for each user. The transmission power for each user is calculated, and congestion relieving measures are implemented based upon the average transmission power and the WTRU battery level.

1 . A method for congestion control in the uplink of a wireless communication system having a wireless transmit/receive unit (WTRU) and a radio network controller (RNC), comprising the steps of: 
 receiving an interference report for each user;    calculating the average noise rise for each user; and    implementing congestion relieving measures based upon the average noise rise and the WTRU battery level.    
   
   
       2 . The method according to  claim 1 , wherein said implementing step includes the steps of: 
 comparing the average noise rise to a rate reduction threshold; and    if the average noise rise is greater than the rate reduction threshold, then performing rate reduction for the user having the highest interference level and terminating the method; 
 if the average noise rise is less than the rate reduction threshold, then comparing the average noise rise to a rate recovery threshold; and  
 if the average noise rise is less than the rate recovery threshold, then performing rate recovery based upon the interference level and the WTRU battery level.  
   
   
   
       3 . The method according to  claim 2 , wherein said performing rate recovery step includes the steps of: 
 ranking the users based on interference level from lowest to highest into a candidate list;    selecting the user with the lowest interference level from the candidate list;    checking the selected user's WTRU battery level; and    if the battery level is below the low level, then performing rate recovery for the selected user and terminating the method;    if the battery level is above the low level, then selecting the next user from the candidate list and repeating said checking step.    
   
   
       4 . A method for congestion control in the uplink of a wireless communication system having a wireless transmit/receive unit (VVTRU) and a radio network controller (RNC), comprising the steps of: 
 (a) receiving an interference report for each user;    (b) calculating the average noise rise for each user;    (c) comparing the average noise rise to a rate reduction threshold;    (d) if the average noise rise is greater than the rate reduction threshold, then performing rate reduction for the user having the highest interference level and terminating the method;    (e) if the average noise rise is less than the rate reduction threshold, then 
 (i) comparing the average noise rise to a rate recovery threshold; and  
 (ii) if the average noise rise is less than the rate recovery threshold, then 
 (A) ranking the users based on interference level from lowest to highest into a candidate list;  
 (B) selecting the user with the lowest interference level from the candidate list;  
 (C) checking the selected user's WTRU battery level; and  
 (D) if the battery level is below the low level, then performing rate recovery for the selected user and terminating the method;  
 (E) if the battery level is above the low level, then selecting the next user from the candidate list and repeating step (e)(ii)(C).  
 
   
   
   
       5 . A method for congestion control in the downlink of a wireless communication system having a wireless transmit/receive unit (WTRU) and a radio network controller (RNC), comprising the steps of: 
 receiving a transmission power report for each user;    calculating the transmission power for each user;    implementing congestion relieving measures based upon the average transmission power and the WTRU battery level.    
   
   
       6 . The method according to  claim 5 , wherein said implementing step includes the steps of: 
 comparing the average transmission power to a rate reduction threshold;    if the average transmission power is greater than the rate reduction threshold, then comparing the average transmission power to a rate recovery threshold; 
 if the average transmission power is greater than the rate recovery threshold, then performing rate recovery for the user with the lowest transmission power and terminating the method;  
   if the average transmission power is less then the rate reduction threshold, then performing rate reduction based upon the average transmission power and the WTRU battery level.    
   
   
       7 . The method according to  claim 6 , wherein said performing rate reduction step includes the steps of: 
 ranking the users based on transmission power from highest to lowest into a candidate list;    selecting the user with the highest transmission power from the candidate list;    checking the selected user's WTRU battery level;    if the battery level is below the low level, then performing rate reduction and terminating the method;    if the battery level is above the low level, then selecting the next user from the candidate list and repeating said checking step.    
   
   
       8 . A method for congestion control in the downlink of a wireless communication system having a wireless transmit/receive unit (WTRU) and a radio network controller (RNC), comprising the steps of: 
 (a) receiving a transmission power report for each user;    (b) calculating the transmission power for each user;    (c) comparing the average transmission power to a rate reduction threshold;    (d) if the average transmission power is greater than the rate reduction threshold, then comparing the average transmission power to a rate recovery threshold; 
 (i) if the average transmission power is greater than the rate recovery threshold, then performing rate recovery for the user with the lowest transmission power and terminating the method;  
   (e) if the average transmission power is less than the rate reduction threshold, then ranking the users based on transmission power from highest to lowest into a candidate list; 
 (i) selecting the user with the highest transmission power from the candidate list;  
 (ii) checking the selected user's WTRU battery level;  
 (iii) if the battery level is below the low level, then performing rate reduction and terminating the method;  
 (iv) if the battery level is above the low level, then selecting the next user from the candidate list and repeating step (e)(ii).