Patent ID: 7164655
Filing Date: 2007-01-16
Classification: H04L,Y02D

Abstract:
1. A method for selecting a current transmission mode in a data packet oriented communication system, wherein the current transmission mode is from a set of available transmission modes, each transmission mode provides a specific transmission rate for transmitting data packets, the data packets are transferred within a transceiver between an automatic request buffer on a higher layer and an automatic request buffer on a lower layer, and the data packets are transmitted from the transceiver on a radio link, the method comprising the steps of: measuring a current radio link quality for the radio link; estimating on the lower layer a first status value corresponding to a state of the automatic request buffer on the higher layer; determining on said lower layer a second status value corresponding to a state of the automatic request buffer on said lower layer; calculating for said lower layer a target transmission rate, wherein said target transmission rate is based on the first and the second status values; identifying from the set of the available transmission modes a subset of transmission modes, each of said transmission modes in the subset providing a maximum transmission of data packets for radio link quality values lower than the current radio link quality; and selecting from said subset a transmission mode as the current transmission mode that provides the specific transmission rate closest to the calculated target transmission rate.