Patent Number: 6,311,070

Title: Variable step size for power control bits to protect against power overshoot

Abstract: The invention provides a system and method for controlling transmission power of a mobile unit in a wireless communication system which minimizes transmission power overshoot caused by counteracting the effects of deep fading. The power control bits are received by the mobile unit then examined on an individual basis and also as a block of bits. Initially, each time a request to increase power is received the mobile unit increases the transmission power by 1 dB. When the mobile unit determines that a predetermined number of bits in a block each indicates a request to increase power is received the mobile unit increases the transmission power by 2 dB. After the block of increase requests, if the mobile receives a request to decrease the transmission power it increases the transmission power by 2 dB, then decreases the transmission power for the next two power control periods by 3 dB each.

Inventors: Tong; Wen (Ottawa, CA), Wang; Rui R. (Ottawa, CA)

Assignee: Nortel Networks Limited

International Classification: H04B 7/005 (20060101); H04B 007/00 (); H04B 007/20 ()

Expiration Date: 10/30/2018