Congestion control in a wireless communication system using the battery level

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).

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).