Fast modulation and coding scheme adaptation protocol for long term evolution with multiple-user multiple input, multiple output

Patent metadata

Field	Value
Publication number	US-2015171939-A1
Application number	US-201314125472-A
Country	US
Kind code	A1
Filing date	Oct 10, 2013
Priority date	Nov 1, 2012
Publication date	Jun 18, 2015
Grant date	—

Abstract

Embodiments for providing fast modulation and coding scheme adaptation for LTE regardless of transmission using single-user multiple-input and multiple-output (SU-MIMO) or multiple-user multiple-input and multiple-output are generally described herein. In some embodiments, channel state information reference signals are sent to user equipment by a node. First channel quality indication feedback based on the channel state information reference signals is received from the user equipment. Physical downlink shared channel data and demodulation reference signals are transmitted using a first modulation and coding scheme based on the first channel quality indication feedback. Second channel quality indication feedback based on measurements performed by the user equipment on the demodulation reference signals is received by a node. Physical downlink shared channel data is transmitted using a second modulation and coding scheme based on the second channel quality indication feedback.

First claim

1 - 31 . (canceled)

32 . A method for providing fast modulation and coding scheme adaptation for LTE, comprising:
sending, by a node, channel state information reference signals to user equipment; receiving, by the node, first channel quality indication feedback from the user equipment based on the channel state information reference signals; transmitting physical downlink shared channel data and demodulation reference signals using a first modulation and coding scheme based on the first channel quality indication feedback; receiving second channel quality indication feedback based, at least in part, on measurements performed by the user equipment on the demodulation reference signals; and transmitting physical downlink shared channel data using a second modulation and coding scheme based on the second channel quality indication feedback.

33 . The method of claim 32 , wherein the transmitting the physical downlink shared channel data using the first modulation and coding scheme comprises calculating the first modulation and coding scheme based on the first channel quality indication feedback.

34 . The method of claim 32 , wherein the transmitting the physical downlink shared channel data using the second modulation and coding scheme comprises calculating the second modulation and coding scheme based on the second channel quality indication feedback based, at least in part, on measurement using the demodulation reference signals.

35 . The method of claim 32 , wherein sending the physical downlink shared channel data and demodulation reference signals comprises sending the physical downlink shared channel data and demodulation reference signals together using physical downlink shared channel beam-forming.

36 . The method of claim 32 , wherein the receiving the second channel quality indication feedback comprises receiving channel quality indication reporting feedback based, at least in part, on measurements performed on the demodulation reference signals.

37 . The method of claim 32 , wherein the receiving the second channel quality indication feedback comprises receiving an explicit request from the user equipment to apply the second modulation and coding scheme based, at least in part, on the measurements performed on the demodulation reference signals.

38 . The method of claim 32 , wherein the receiving the second channel quality indication feedback comprises receiving delta feedback, wherein the user equipment that informs the node of channel quality changes since a last measurement that the user equipment performed and that requests the node make an adjustment to the modulation and coding scheme based, at least in part, on the measurements performed on the demodulation reference signals.

39 . A method for providing fast modulation and coding scheme adaptation for LTE, comprising:
receiving, at user equipment, channel state information reference signals sent by a node; measuring, by the user equipment, a channel quality information over the channel state information reference signals; sending first channel quality indication feedback to the node; receiving, at the user equipment, demodulation reference signals; measuring, by the user equipment, channel quality information over the demodulation reference signals; sending, by the user equipment, second channel quality information feedback to the node based, at least in part, on the measurement of the channel quality information over the demodulation reference signals; and receiving physical downlink shared channel data using a second modulation and coding scheme based on the second channel quality indication feedback.

40 . The method of claim 39 , wherein the sending the demodulation reference signals comprises sending physical downlink shared channel data and the demodulation reference signals together using physical downlink shared channel beam-forming.

41 . The method of claim 39 , wherein the sending the second channel quality information feedback comprises transmitting channel quality indication reporting feedback based, at least in part, on the measurement of the channel quality information over the demodulation reference signals.

42 . The method of claim 39 , wherein the transmitting the second channel quality information feedback comprises transmitting an explicit request from the user equipment to apply a modulation and coding scheme based, at least in part, on the measurement of the channel quality information over the demodulation reference signals.

43 . The method of claim 39 , wherein the sending the second channel quality information feedback comprises transmitting delta feedback, that informs the node of channel quality changes since a last measurement performed by the user equipment and that requests for the node to make an adjustment to the modulation and coding scheme based, at least in part, on the measurements performed on the demodulation reference signals.

44 . A node for providing fast modulation and coding scheme adaptation for LTE, comprising:
memory for storing data; and a controller, coupled to the memory, the controller arranged to:
send channel state information reference signals to user equipment;
receive first channel quality indication feedback from the user equipment based on the channel state information reference signals;
transmit physical downlink shared channel data and demodulation reference signals using a first modulation and coding scheme based on the first channel quality indication feedback;
receive second channel quality indication feedback based, at least in part, on measurements performed by the user equipment on the demodulation reference signals; and
transmit physical downlink shared channel data using a second modulation and coding scheme based on the second channel quality indication feedback.

45 . The node of claim 44 , wherein the controller calculates the first modulation and coding scheme based on the first channel quality indication feedback.

46 . The node of claim 44 , wherein the controller calculates the second modulation and coding scheme based on the second channel quality indication feedback based, at least in part, on measurement using the demodulation reference signals.

47 . The node of claim 44 , wherein the controller sends the physical downlink shared channel data and demodulation reference signals together using physical downlink shared channel beam-forming.

48 . The node of claim 44 , wherein the controller receives channel quality indication reporting feedback based on measurements performed on the demodulation reference signals.

49 . The node of claim 44 , wherein the controller receives an explicit request from the user equipment to apply the second modulation and coding scheme based, at least in part, on the measurements performed on the demodulation reference signals.

50 . The node of claim 44 , wherein the controller receives delta feedback, that provides information regarding channel quality changes since a last measurement that the user equipment performed and receives a request to make an adjustment to the modulation and coding scheme based, at least in part, on the measurements performed on the demodulation reference signals.

51 . A user equipment for providing fast modulation and coding scheme adaptation for LTE, comprising:
memory for storing data; and a processor, coupled to the memory, the processor arranged to:
receive channel state information reference signals sent by a node;
measure the channel quality information over

Assignees

• Intel Corp

Inventors

• Davydov Alexei Vladimirovich
• Morozov Gregory Vladimirovich
• Han Seunghee
• Maltsev Alexander Alexandrovich
• Bolotin Ilya
• Sergeyev Vadim Sergeyevich
• Fwu Jong-Kae

Classifications

• H04W72/54

  based on quality criteria · CPC title

• H04W72/21

  in the uplink direction of a wireless link, i.e. towards the network · CPC title

• H04W72/23

  in the downlink direction of a wireless link, i.e. towards a terminal · CPC title

• H04W72/563

  of the wireless resources · CPC title

• H04W72/542

  using measured or perceived quality · CPC title