Method and transceiver for a data packet oriented communication system
First Claim
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 on a radio link between the transceivers, 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 value;
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.
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Accused Products
Abstract
A method and a transceiver for selecting a current transmission mode in a data packet oriented communication system involves 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 based on the first and the second status values; identifying from the set of the available transmission modes a subset of transmission modes, each 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, which provides a transmission rate closest to the calculated target transmission rate.
38 Citations
16 Claims
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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 on a radio link between the transceivers, the method comprising the steps of:
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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 value;
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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A transceiver in a data packet oriented communication system, wherein a current transmission mode is selectable from a set of available transmission modes, each transmission mode providing a specific transmission rate for transmitting data packets, the data packets transferable within the transceiver between an automatic request buffer on a higher layer and an automatic request buffer on a lower layer, and the data packets are transmittable from the transceiver via a radio link, said transceiver comprising:
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means for measuring a current radio link quality for the radio link;
means for determining on the lower layer a second status value corresponding to a state of the automatic request buffer on said lower layer;
means for estimating on the lower layer a first status value corresponding to a state of the automatic request buffer on the higher layer; and
means for calculating for the lower layer a target transmission rate, wherein the target transmission rate is based on the first and the second status values. - View Dependent Claims (12, 13, 14, 15, 16)
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Specification