ARQ parameter negotiation in a data packet transmission system using link adaptation
First Claim
1. A method for transmitting data packets between two transceivers in a communication system, wherein a transmission mode for transmitting the data packets is selected from a plurality of available transmission modes and an automatic repeat request for retransmission is used, comprising the steps of:
- calculating, for each available transmission mode, a channel parameter based on the link quality;
determining, for each transmission mode, a transmission capacity parameter;
identifing a state of an automatic repeat request control window for at least one transceiver;
estimating a user quality value for each available transmission mode based on the channel parameter, the transmission capacity parameter, and the state of the automatic repeat request control window from at least one transceiver; and
selecting a transmission mode of the plurality of available transmission modes, the selected transmission mode providing the best user quality value;
wherein the transmission capacity parameter is determined by a maximal data rate (Rmaxi ) provided in each available transmission mode, a transmission (b) and transmission frame (L) length provided for transmitting data packets.
1 Assignment
0 Petitions
Accused Products
Abstract
A method for transmitting data packets between a transmitter and a receiver unit in a communication system is described. For transmitting data packets a transmission mode is selected from a plurality of available transmission modes and an automatic repeat request for retransmission is used. Therefore for each available transmission mode a channel parameter based on link quality is calculated and a transmission capacity parameter is determinated. The state of the automatic repeat request control window for at least one transceiver is identified. For each available transmission mode an estimation of the user quality value based on the channel parameter, the transmission capacity parameter and the state of the automatic repeat request control window from at least one transceiver is estimated. The transmission mode that provides the best user quality value is selected.
16 Citations
11 Claims
-
1. A method for transmitting data packets between two transceivers in a communication system, wherein a transmission mode for transmitting the data packets is selected from a plurality of available transmission modes and an automatic repeat request for retransmission is used, comprising the steps of:
-
calculating, for each available transmission mode, a channel parameter based on the link quality; determining, for each transmission mode, a transmission capacity parameter; identifing a state of an automatic repeat request control window for at least one transceiver; estimating a user quality value for each available transmission mode based on the channel parameter, the transmission capacity parameter, and the state of the automatic repeat request control window from at least one transceiver; and selecting a transmission mode of the plurality of available transmission modes, the selected transmission mode providing the best user quality value; wherein the transmission capacity parameter is determined by a maximal data rate (Rmaxi ) provided in each available transmission mode, a transmission (b) and transmission frame (L) length provided for transmitting data packets. - View Dependent Claims (2, 3, 4)
-
-
5. A method for transmitting data packets between two transceivers in a communication system, wherein a transmission mode for transmitting the data packets is selected from a plurality of available transmission modes and an automatic repeat request for retransmission is used, comprising the steps of:
-
calculating, for each available transmission mode, a channel parameter based on the link quality; determining, for each transmission mode, a transmission capacity parameter; identifing a state of an automatic repeat request control window for at feast one transceiver; estimating a user quality value for each available transmission mode based on the channel parameter, the transmission capacity parameter, and the state of the automatic repeat request control window from at least one transceiver; and selecting a transmission mode of the plurality of available transmission modes, the selected transmission mode providing the best user quality value; wherein the user quality value for each available transmission mode is described by a corresponding user data throughput (Ti ) for that transmission mode; and
,wherein the step of estimating the user data throughput (Ti ) is based on a protocol data unit error rate (PERi), a maximal data rate (Rmaxi), a transmission time b and transmission frame length L, and the state of the automatic repeat request control window (Rw ) from at least one transceiver.
-
-
6. A transceiver having a controlling part, the controlling part comprising:
-
means for calculating a channel parameter based on a link quality; means for determining a transmission capacity parameter for each of a plurality of available transmission modes; means for identifying a state of an automatic repeat request control window in at least one transceiver; means for estimating a user quality value for each available transmission mode based on the channel parameter, the transmission capacity parameter and the state of the automatic repeat request control window from at least one transceiver; and means for selecting a transmission mode of the plurality of available transmission modes, the selected transmission mode providing the best estimated user quality value; wherein the transmission capacity parameter is determined by a maximal data rate (Rmaxi ) provided in each available transmission mode, a transmission time b and transmission frame length L provided for transmitting data packets. - View Dependent Claims (7, 8, 9, 10, 11)
-
Specification