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1. (WO2006117053) VARIABLE TRANSMIT POWER CONTROL STRATEGIES FOR HIGH-SPEED DOWNLINK PACKET ACCESS SYSTEMS

Pub. No.:    WO/2006/117053    International Application No.:    PCT/EP2006/003259
Publication Date: Nov 9, 2006 International Filing Date: Apr 10, 2006
IPC: H04B 7/005
Applicants: TELEFONAKTIEBOLAGET L M ERICSSON (publ)
LINDOFF, Bengt
Inventors: LINDOFF, Bengt
Title: VARIABLE TRANSMIT POWER CONTROL STRATEGIES FOR HIGH-SPEED DOWNLINK PACKET ACCESS SYSTEMS
Abstract:
In communication systems that send transmit power control (TPC) commands in one direction so that only enough transmit power is used to maintain sufficient quality in the opposite direction, the TPC commands can be used to obtain information about the quality of the opposite-direction link. If there is sufficient quality, the number of TPC 'up' commands is about the same as the number of TPC 'down' commands, and if there is poor quality, more TPC 'up' commands are received than 'down' commands. A user equipment can use this information to adjust its TPC strategy and reduce the risk of poor reception and loss of synchronization to a communication node, such as a serving node for high-speed downlink packet access.