CHANNEL QUALITY INFORMATION FEEDBACK TECHNIQUES

• US 20150163039A1
• Filed: 12/23/2013
• Published: 06/11/2015
• Est. Priority Date: 01/03/2013
• Status: Active Grant

• Current Assignee: Apple Inc.
• Original Assignee: Han Seunghee
• Inventors: Davydov, Alexei, Zhu, Yuan, Chen, Xiaogang, Maltsev, Alexander, Morozov, Gregory, Han, SeungHee
• Granted Patent: US 9,986,477 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: H04B 7/024 Co-operative use of antennas of several sites, e.g. in co-ordinated multipoint or co-operative multiple-input multiple-output [MIMO] systems
• CPC Class Codes: H04B 7/0486 taking channel rank into account
• CPC Class Codes: H04B 7/0626 Channel coefficients, e.g. channel state information [CSI]
• CPC Class Codes: H04B 7/0632 Channel quality parameters, e.g. channel quality indicator [CQI]
• CPC Class Codes: H04J 11/0053 using co-ordinated multipoint transmission/reception co-ordinated antenna or beam-forming aspects H04B7/022
• CPC Class Codes: H04L 1/0026 Transmission of channel quality indication
• CPC Class Codes: H04L 12/4641 Virtual LANs, VLANs, e.g. virtual private networks [VPN] LAN interconnection over a bridge based backbone H04L12/462; encapsulation techniques H04L12/4633; routing of packets H04L45/00; packet switches H04L49/00; virtual private networks for security H04L63/0272
• CPC Class Codes: H04L 5/0053 Allocation of signaling, i.e. of overhead other than pilot signals
• CPC Class Codes: H04L 5/0057 Physical resource allocation for CQI
• CPC Class Codes: H04L 61/5007 Internet protocol [IP] addresses
• CPC Class Codes: H04L 63/304 intercepting circuit switched data communications lawful interception of wireless network communications H04W12/02
• CPC Class Codes: H04L 63/306 intercepting packet switched data communications, e.g. Web, Internet or IMS communications
• CPC Class Codes: H04W 12/02 Protecting privacy or anonymity, e.g. protecting personally identifiable information [PII]
• 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 36/0005 Control or signalling for completing the hand-off
• CPC Class Codes: H04W 36/0019 adapted for mobile IP [MIP]
• CPC Class Codes: H04W 36/22 for handling the traffic
• CPC Class Codes: H04W 48/08 Access restriction or access information delivery, e.g. discovery data delivery signalling during connection H04W76/00
• CPC Class Codes: H04W 48/16 Discovering, processing access restriction or access information
• CPC Class Codes: H04W 52/0222 : in packet switched networks
• CPC Class Codes: H04W 56/0015 : one node acting as a reference for the others
• CPC Class Codes: H04W 56/005 : compensating for timing error by adjustment in the receiver
• CPC Class Codes: H04W 56/0095 : estimated based on signal strength
• CPC Class Codes: H04W 68/00 : User notification, e.g. alerting and paging, for incoming communication, change of service or the like
• 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 72/30 : Resource management for broadcast services
• CPC Class Codes: H04W 76/10 : Connection setup
• CPC Class Codes: H04W 76/11 : Allocation or use of connection identifiers
• CPC Class Codes: H04W 76/14 : Direct-mode setup
• CPC Class Codes: H04W 8/082 : for traffic bypassing of mobility servers, e.g. location registers, home PLMNs or home agents
• CPC Class Codes: H04W 84/12 : WLAN [Wireless Local Area Networks]
• 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

Various embodiments are generally directed to improved channel quality information feedback techniques. In one embodiment, for example, an evolved node B (eNB) may comprise a processor circuit, a communication component for execution by the processor circuit to receive a channel quality index for a physical downlink shared channel (PDSCH), the channel quality index associated with a defined reference resource, and a selection component for execution by the processor circuit to select a modulation and coding scheme (MCS) for transmission over the PDSCH of user equipment (UE) data in one or more resource blocks, the selection component to compensate for a difference between a cell-specific reference signal (CRS) overhead of the defined reference resource and a CRS overhead of the one or more resource blocks when selecting the MCS. Other embodiments are described and claimed.

Claims

1-25. -25. (canceled)

26. User equipment (UE), comprising:

logic, at least a portion of which is in hardware, the logic to derive a channel quality indicator (CQI) index for a frequency band of an orthogonal frequency-division multiple access (OFDMA) wireless communication system, the logic to derive the CQI index based on a channel state information (CSI) reference resource of a shared wireless downlink channel, without reference to resource elements of the CSI reference resource that are allocated to an enhanced physical downlink control channel (EPDCCH); and

a radio-frequency (RF) transmitter to transmit electromagnetic signals representing the CQI index on a wireless uplink channel.

27. The UE of claim 26, the CQI index comprising CSI for a serving cell of the UE.

28. The UE of claim 26, the CSI reference resource defined in a frequency domain by a group of downlink physical resource blocks corresponding to the frequency band.

29. The UE of claim 26, a first three orthogonal frequency-division multiplexing (OFDM) symbols of the CSI reference resource to be occupied by control signals.

30. The UE of claim 26, the CSI reference resource defined in a time domain by a single downlink subframe.

31. The UE of claim 26, the logic to configure a CSI process to report CSI comprising the CQI index, a precoding matrix indicator (PMI) and a rank indication (RI).

32. The UE of claim 26, the shared wireless downlink channel comprising a physical downlink shared channel (PDSCH).

33. The UE of claim 26, comprising one or more RF antennas coupled to the RF transmitter.

34. The UE of claim 26, comprising a touchscreen display.

35. User equipment (UE), comprising:

logic, at least a portion of which is in hardware, the logic to configure a channel state information (CSI) process to report a precoding matrix indicator (PMI), a rank indication (RI), and a channel quality indicator (CQI) index for an orthogonal frequency-division multiple access (OFDMA) frequency band, the logic to derive the CQI index based on a channel state information (CSI) reference resource of a downlink shared channel, the CSI reference resource to comprise a same cell-specific reference signal (CRS) overhead as a CRS overhead corresponding to a number of CRS antenna ports of a serving cell of the UE; and

a radio-frequency (RF) transceiver to transmit the CQI index over a wireless uplink channel.

36. The UE of claim 35, the downlink shared channel comprising a physical downlink shared channel (PDSCH).

37. The UE of claim 35, the CSI reference resource defined in a time domain by a single downlink subframe.

38. The UE of claim 35, the CSI reference resource defined in a frequency domain by a group of downlink physical resource blocks corresponding to the OFDMA frequency band.

39. The UE of claim 35, the logic to configure the CSI process to report CSI for a serving cell of the UE, the CSI comprising the CQI index, the PMI, and the RI.

40. The UE of claim 35, the logic to derive the CQI index based on an assumption that no resource elements of the CSI reference resource are allocated to an enhanced physical downlink control channel (EPDCCH).

41. The UE of claim 35, comprising one or more RF antennas coupled to the RF transceiver.

42. The UE of claim 35, comprising a user input device.

43. At least one non-transitory computer-readable storage medium comprising a set of instructions that, in response to being executed on user equipment (UE), cause the UE to:

receive a channel state information (CSI) reference signal (CSI-RS) and a CSI interference measurement (CSI-IM) resource;

define a CSI reference resource of a wireless downlink channel to comprise a cell-specific reference signal (CRS) overhead including a same number of CRS overhead resource elements (REs) as a CRS overhead corresponding to a number of CRS antenna ports of a serving cell of the UE; and

derive a channel quality indicator (CQI) index based on the CSI-RS, the CSI-IM resource, and the CSI reference resource.

44. The at least one non-transitory computer-readable storage medium of claim 43, comprising instructions that, in response to being executed on the UE, cause the UE to configure a CSI process to report the CQI index.

45. The at least one non-transitory computer-readable storage medium of claim 44, comprising instructions that, in response to being executed on the UE, cause the UE to configure the CSI process to report the CQI index, a precoding matrix indicator (PMI) and a rank indication (RI).

46. The at least one non-transitory computer-readable storage medium of claim 43, comprising instructions that, in response to being executed on the UE, cause the UE to:

determine a channel measurement based on the CSI-RS;

determine an interference measurement based on the CSI-IM resource; and

derive the CQI index based on the channel measurement, the interference measurement, and the CSI reference resource.

47. The at least one non-transitory computer-readable storage medium of claim 43, comprising instructions that, in response to being executed on the UE, cause the UE to derive the CQI index without reference to a number of REs of the CSI reference resource that are allocated to an enhanced physical downlink control channel (EPDCCH).

48. The at least one non-transitory computer-readable storage medium of claim 43, the wireless downlink channel to comprise a shared channel of an orthogonal frequency-division multiple access (OFDMA) wireless network.

49. The at least one non-transitory computer-readable storage medium of claim 43, the wireless downlink channel to comprise a physical downlink shared channel (PDSCH).

50. The at least one non-transitory computer-readable storage medium of claim 43, the CSI-RS to comprise a non-zero power (NZP) CSI-RS.