Method and system for unified rate adaptation for su-bf and mu-mimo operation
AssigneeQUALCOMM Incorporated
InventorsShu Du, Zhanfeng Jia, Ning Zhang, Guido R. Frederiks, Vincent K. Jones, Qinghai Gao
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Abstract
A method of providing rate adaptation in a multi-user wireless communication system including single-user beamforming (SU-BF) and multi-user multiple-input multiple-output (MU-MIMO) is described. In this method, a master rate, which is a modulation and coding scheme (MCS) for the SU-BF, is determined. An MCS for each transmit mode is derived from the master rate using a rate mapping. Using the results from the mapping, the master rate, instead of the MCS for each transmit mode, is tracked. In one embodiment, a mapping calibration is periodically performed.
Claims30
A method of adapting a rate of transmission at a wireless communication device, comprising:
- operating at a single user (SU) transmit mode of the wireless communication device, wherein the SU transmit mode uses a first modulation and coding scheme(MCS);
- and
- switching to a multi-user multiple input multiple output (MU-MIMO) transmit mode of the wireless communication device, wherein a second MCS is used for the MU-MIMO transmit mode based at least in part on the first MCS, the second MCS being less than the first MCS.
A non-transitory, computer-readable medium storing computer-executable instructions for adapting a rate of transmission in a multi-user wireless communication system, the instructions when executed by a processor causing a wireless communication device to execute a process comprising:
- operating at a single user (SU) transmit mode of the wireless communication device, wherein the SU transmit mode uses a first modulation and coding scheme (MCS);
- and
- switching to a multi-user multiple input multiple output (MU-MIMO) transmit mode of the wireless communication device, wherein a second MCS is used for the MU-MIMO transmit mode based at least in part on the first MCS, the second MCS being less than the first MCS for the SU transmit mode.
A wireless communication device for providing rate adaptation in a multi-user wireless communication system, the wireless communication device comprising:
- a rate control block to operate at a single user (SU) transmit mode of the wireless communication device, wherein the SU transmit mode uses a first modulation and coding scheme (MCS), and switch to a multi-user multiple input multiple output (MU-MIMO) transmit mode of the wireless communication device, wherein a second MCS is used for the MU-MIMO transmit mode based at least in part on the first MCS, the second MCS being less than the first MCS.
A wireless communication device, comprising:
- means for operating at a single-user (SU) transmit mode of the wireless communication device, wherein the SU transmit mode uses a first modulation and coding scheme (MCS);
- and
- means for switching to a multi-user multiple input multiple output (MU-MIMO) transmit mode of the wireless communication device, wherein a second MCS is used for the MU-MIMO transmit mode based at least in part on the first MCS, the second MCS being less than the MCS.
Dependencies are inferred from the claim text.