Rate adaptation of wireless communication channels

US7808952B2 · kind B2 · utility

Assignee

• Telefonaktiebolaget LM Ericsson (Publ) · SE

Inventors

• Long Duan · San Diego, US
• Rath Vannithamby · Portland, US
• Wanshi Chen · San Diego, US
• Reza Shahidi · San Diego, US
• Alpaslan Savas · Summit, US
• Joakim Hulten · San Diego, US

Key dates

• Filing date: Jun 10, 2004
• Grant date: Oct 5, 2010
• Expiry date: Aug 5, 2029

Classification

• Technology area (CPC H): Electricity
• CPC primary: H04W52/26
• WIPO field: Digital communication
• WIPO sector: Electrical engineering

Abstract

A wireless communication network manages variable data rate communication channels using both short-term data rate adaptation and longer-term resource allocation adjustment. For example, an exemplary base station system may track the actual transmit power being used to transmit a given communication channel on a per frame basis, or faster, and use that tracked value to infer changing channel conditions, e.g., for a given current data rate, higher power indicates poorer channel conditions and lower power indicates better channel conditions. Additionally, or alternatively, channel quality information reported by a receiving mobile station can be used. Regardless, relatively fast data rate changes can be made responsive to monitoring the channel conditions, while retaining the communication resource allocation for the channel. Over the longer term, however, the allocation itself can be changed, e.g., increased or decreased, depending on whether the channel is being efficiently utilized.