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

• US 9,609,564 B2
• Filed: 10/10/2013
• Issued: 03/28/2017
• Est. Priority Date: 11/01/2012
• Status: Active Grant

• Current Assignee: Apple Inc.
• Original Assignee: Intel Corporation
• Inventors: Davydov, Alexei, Morozov, Gregory, Han, Seunghee, Maltsev, Alexander, Bolotin, Ilya, Sergeyev, Vadim, Fwu, Jong-Kae
• Primary Examiner(s): Zhu, Alvin
• Application Number:
  US14/125,472
• Publication Number:
  US 20150171939A1
• Time in Patent Office: 1,265 Days
• US Class Current: 1/1
• CPC Class Codes: H04B 7/0417 Feedback systems
• CPC Class Codes: H04B 7/0452 Multi-user MIMO systems
• CPC Class Codes: H04B 7/0626 Channel coefficients, e.g. channel state information [CSI]
• CPC Class Codes: H04J 11/00 Orthogonal multiplex systems, e.g. using WALSH codesH04J13/00 takes precedence
• CPC Class Codes: H04J 11/0023 Interference mitigation or co-ordination direct sequence spread spectrum [DSSS] systems H04B1/7097; frequency hopping H04B1/713; allocation criteria for ingress interference avoidance H04L5/0062; frequency allocation criteria for requirements on out-of-channel emissions H04L5/0066; arrangements for removing intersymbol interference or baseband equalisers H04L25/03006; peak power aspects in multicarrier modulation H04L27/2614; power management H04W52/00; traffic scheduling H04W72/54, H04W72/541
• CPC Class Codes: H04J 3/0614 the synchronising signal being characterised by the amplitude, duration or polarity
• CPC Class Codes: H04L 1/0027 Scheduling of signalling, e.g. occurrence thereof
• CPC Class Codes: H04L 2101/375 Access point names [APN]
• CPC Class Codes: H04L 5/0046 Determination of how many bits are transmitted on different sub-channels
• CPC Class Codes: H04L 5/0048 Allocation of pilot signals, i.e. of signals known to the receiver
• CPC Class Codes: H04L 5/006 Quality of the received signal, e.g. BER, SNR, water filling
• CPC Class Codes: H04L 61/3005 Mechanisms for avoiding name conflicts
• CPC Class Codes: H04L 67/104 Peer-to-peer [P2P] networks
• CPC Class Codes: H04W 16/20 for indoor coverage or short range network deployment
• CPC Class Codes: H04W 16/24 Cell structures
• CPC Class Codes: H04W 16/26 Cell enhancers or enhancement, e.g. for tunnels, building shadow
• CPC Class Codes: H04W 24/02 Arrangements for optimising operational condition
• CPC Class Codes: H04W 24/04 Arrangements for maintaining operational condition
• CPC Class Codes: H04W 24/08 Testing, supervising or monitoring using real traffic
• CPC Class Codes: H04W 24/10 Scheduling measurement reports ; Arrangements for measurement reports
• CPC Class Codes: H04W 28/0268 : using specific QoS parameters for wireless networks, e.g. QoS class identifier [QCI] or guaranteed bit rate [GBR] negotiating SLA or negotiating QoS H04W28/24
• CPC Class Codes: H04W 28/04 : Error control
• CPC Class Codes: H04W 28/24 : Negotiating SLA [Service Level Agreement]; Negotiating QoS [Quality of Service]
• CPC Class Codes: H04W 36/20 : for optimising the interference level
• CPC Class Codes: H04W 4/70 : Services for machine-to-machine communication [M2M] or machine type communication [MTC]
• CPC Class Codes: H04W 52/0216 : using a pre-established activity schedule, e.g. traffic indication frame
• CPC Class Codes: H04W 52/0235 : where the received signal is a power saving command
• CPC Class Codes: H04W 60/04 : using triggered events
• CPC Class Codes: H04W 64/003 : locating network equipment
• CPC Class Codes: H04W 72/0446 : Resources in time domain, e.g. slots or frames
• CPC Class Codes: H04W 72/21 : in the uplink direction of a wireless link, i.e. towards the network
• CPC Class Codes: H04W 72/23 : in the downlink direction of a wireless link, i.e. towards a terminal
• CPC Class Codes: H04W 72/54 : based on quality criteria
• CPC Class Codes: H04W 72/542 : using measured or perceived quality
• CPC Class Codes: H04W 72/563 : of the wireless resources
• CPC Class Codes: H04W 74/0858 : collision detection
• CPC Class Codes: H04W 76/14 : Direct-mode setup
• CPC Class Codes: H04W 76/27 : Transitions between radio resource control [RRC] states
• CPC Class Codes: H04W 76/28 : Discontinuous transmission [DTX]; Discontinuous reception [DRX]
• CPC Class Codes: H04W 8/005 : Discovery of network devices, e.g. terminals
• CPC Class Codes: H04W 88/02 : Terminal devices
• CPC Class Codes: H04W 88/06 : adapted for operation in multiple networks or having at least two operational modes, e.g. multi-mode terminals
• CPC Class Codes: H04W 88/08 : Access point devices
• CPC Class Codes: H04W 88/16 : Gateway arrangements
• CPC Class Codes: Y02D 30/70 : in wireless communication networks

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.

Claims

1. 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,

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, and

the second channel quality indication feedback comprises one of;

channel quality indication reporting feedback that is based, at least in part, on measurements performed on the demodulation reference signals free from an indication to change the modulation and coding scheme,

an explicit request to apply a particular modulation and coding scheme that is determined by the user equipment and is based, at least in part, on the measurements performed on the demodulation reference signals, or

delta feedback that comprises channel quality changes since a last measurement that the user equipment performed.

2. The method of claim 1, further comprising calculating the first modulation and coding scheme based on the first channel quality indication feedback prior to transmitting the physical downlink shared channel data using the first modulation and coding scheme.

3. The method of claim 1, wherein 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 prior to transmitting the physical downlink shared channel data using the second modulation and coding scheme.

4. The method of claim 1, wherein the second channel quality indication feedback comprises the channel quality indication reporting feedback.

5. The method of claim 1, wherein the second channel quality indication feedback comprises the explicit request.

6. The method of claim 1, wherein the second channel quality indication feedback comprises the delta feedback.

21. The method of claim 1, wherein:

the channel state information reference signals are sent to the user equipment using a Single User Multiple-input and multiple-output (SU MEMO) transmission, and the physical downlink shared channel data and demodulation reference signals are transmitted using a Multi User MIMO (MU MIMO) transmission.

22. The method of claim 1, wherein adjustment from the first modulation and coding, scheme to the second modulation and coding scheme is performed free from tracking Acknowledgement (ACK)/Negative ACK (NACK) messages.

23. The method of claim 1, further comprising mapping modulated symbols to at least a partial resource block to form a coverage boosting resource unit, the coverage boosting resource unit spreading at least one data bit over at least the partial resource block.

7. 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 and physical downlink shared channel data sent together using physical downlink shared channel beam-forming;

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,

wherein the second channel quality indication feedback comprises one of;

channel quality indication reporting feedback that is based, at least in part, on measurements performed on the demodulation reference signals free from an indication to change the modulation and coding scheme,

an explicit request to apply a particular modulation and coding scheme that is determined by the user equipment and is based, at least in part, on the measurements performed on the demodulation reference signals, or

delta feedback that comprises channel quality changes since a last measurement that the user equipment performed.

8. The method of claim 7, wherein the second channel quality information feedback comprises the channel quality indication reporting feedback.

9. The method of claim 7, wherein the second channel quality information feedback comprises the explicit request.

10. The method of claim 7, wherein the second channel quality information feedback comprises the delta feedback.

11. 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,

wherein the physical downlink shared channel data and the demodulation reference signals are sent together using physical downlink shared channel beam-forming, and

the second channel quality indication feedback comprises one of;

channel quality indication reporting feedback that is based, at least in part, on measurements performed on the demodulation reference signals free from an indication to change the modulation and coding scheme,

an explicit request to apply a particular modulation and coding scheme that is determined by the user equipment and is based, at least in part, on the measurements performed on the demodulation reference signals, or

delta feedback that comprises channel quality changes since a last measurement that the user equipment performed.

12. The node of claim 11, wherein the controller calculates the first modulation and coding scheme based on the first channel quality indication feedback prior to transmission of the physical downlink shared channel data using the first modulation and coding scheme.

13. The node of claim 11, 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 prior to transmission of the physical downlink shared channel data using the second modulation and coding scheme.

14. The node of claim 11, wherein the controller receives the channel quality indication reporting feedback.

15. The node of claim 11, wherein the controller receives the explicit request.

16. The node of claim 11, wherein the controller receives the delta feedback.

17. 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 anode;

measure the channel quality information over the channel state information reference signals;

send first channel quality indication feedback to the node;

receive demodulation reference signals through a Multi User Multiple-input and multiple-output (MU MIMO) transmission, wherein the demodulation reference signals and physical downlink shared channel data are received together using physical downlink shared channel beam-forming;

measure channel quality information over the demodulation reference signals; and

send 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,

wherein the second channel quality indication feedback comprises one of;

channel quality indication reporting feedback that is based, at least in part, on measurements performed on the demodulation reference signals free from an indication to change the modulation and coding scheme,

an explicit request to apply a particular modulation and coding scheme that is determined by the user equipment and is based, at least in part, on the measurements performed on the demodulation reference signals, or

delta feedback that comprises channel quality changes since a last measurement that the user equipment performed.

18. The user equipment of claim 17, wherein the processor transmits the channel quality indication reporting feedback.

19. The user equipment of claim 17, wherein the processor transmits the explicit request.

20. The user equipment of claim 17, wherein the processor transmits the delta feedback.