Methods for aperiodic CSI report triggering for flexible subframes in LTE TDD eIMTA systems with dynamic UL-DL reconfiguration

• US 10,200,890 B2
• Filed: 09/25/2014
• Issued: 02/05/2019
• Est. Priority Date: 09/26/2013
• Status: Active Grant

• Current Assignee: Apple Inc.
• Original Assignee: Intel IP Corporation (Intel Corporation)
• Inventors: Khoryaev, Alexey, Han, Seunghee, Choi, Gi Wan, Fwu, Jong-Kae
• Primary Examiner(s): Atkins, George C
• Application Number:
  US14/583,595
• Publication Number:
  US 20160381587A1
• Time in Patent Office: 1,594 Days
• Field of Search: None
• CPC Class Codes: G06F 9/4856 resumption being on a different machine, e.g. task migration, virtual machine migration G06F9/5088 takes precedence
• CPC Class Codes: H04L 1/12 by using return channel
• CPC Class Codes: H04L 1/1607 Details of the supervisory signal
• CPC Class Codes: H04L 1/1854 Scheduling and prioritising arrangements
• CPC Class Codes: H04L 1/1887 Scheduling and prioritising arrangements
• CPC Class Codes: H04L 47/12 Avoiding congestion; Recovering from congestion
• CPC Class Codes: H04L 47/122 by diverting traffic away from congested entities
• CPC Class Codes: H04L 5/001 the frequencies being arranged in component carriers
• CPC Class Codes: H04L 5/0035 Resource allocation in a cooperative multipoint environment
• CPC Class Codes: H04L 5/0037 Inter-user or inter-terminal allocation
• CPC Class Codes: H04L 5/0048 Allocation of pilot signals, i.e. of signals known to the receiver
• CPC Class Codes: H04L 5/0055 Physical resource allocation for ACK/NACK for physical mapping arrangements in ARQ protocols H04L1/1861
• CPC Class Codes: H04L 67/025 for remote control or remote monitoring of applications
• CPC Class Codes: H04L 67/104 Peer-to-peer [P2P] networks
• CPC Class Codes: H04W 24/04 Arrangements for maintaining operational condition
• CPC Class Codes: H04W 24/10 Scheduling measurement reports ; Arrangements for measurement reports
• CPC Class Codes: H04W 28/02 Traffic management, e.g. flow control or congestion control
• CPC Class Codes: H04W 36/03 Reselecting a link using a direct mode connection
• CPC Class Codes: H04W 36/32 by location or mobility data, e.g. speed data
• CPC Class Codes: H04W 40/22 using selective relaying for reaching a BTS [Base Transceiver Station] or an access point
• CPC Class Codes: H04W 40/24 : Connectivity information management, e.g. connectivity discovery or connectivity update
• CPC Class Codes: H04W 48/16 : Discovering, processing access restriction or access information
• CPC Class Codes: H04W 52/0274 : by switching on or off the equipment or parts thereof
• CPC Class Codes: H04W 72/0446 : Resources in time domain, e.g. slots or frames
• CPC Class Codes: H04W 72/0453 : Resources in frequency domain, e.g. a carrier in FDMA
• CPC Class Codes: H04W 72/23 : in the downlink direction of a wireless link, i.e. towards a terminal
• CPC Class Codes: H04W 76/14 : Direct-mode setup
• CPC Class Codes: H04W 76/18 : Management of setup rejection or failure
• CPC Class Codes: H04W 76/27 : Transitions between radio resource control [RRC] states
• CPC Class Codes: H04W 76/38 : triggered by timers
• CPC Class Codes: H04W 8/005 : Discovery of network devices, e.g. terminals
• CPC Class Codes: H04W 84/12 : WLAN [Wireless Local Area Networks]
• CPC Class Codes: H04W 88/08 : Access point devices
• CPC Class Codes: H04W 92/20 : between access points
• CPC Class Codes: Y02D 10/00 : Energy efficient computing, e.g. low power processors, power management or thermal management
• CPC Class Codes: Y02D 30/70 : in wireless communication networks

Abstract

A method to trigger aperiodic CSI reports in LTE TDD systems having dynamic uplink-downlink configurations is proposed. When uplink grants can be sent on any subframe, the method further defines how to indicate which measured subframe set is to be used in reporting the aperiodic CSI. The method is useful for homogeneous networks and networks employing enhanced interference management and traffic adaptation (eIMTA).

Claims

1. A user equipment (UE) to be used in a wireless network, comprising:

an electronic memory; and

a processor to;

receive from an evolved NodeB (eNB) through a downlink control signal in the wireless network, a channel state information (CSI) request in a frame, wherein the CSI request comprises a CSI request field of two bits, and wherein the UE is configured by higher layers for enhanced interference mitigation and traffic adaptation (eIMTA) for at least one serving cell; and

generate an aperiodic CSI report if a value of the two bits of the CSI request field indicates that the aperiodic CSI report is triggered and if the value is associated with at least one or more pairs comprising a CSI process and a corresponding CSI subframe measurement set configured by the higher layers, wherein the CSI subframe measurement set specifies which plurality of subframes of the frame are used to generate the aperiodic CSI report; and

discard the CSI request if the value of the two bits of the CSI request field indicates that no aperiodic CSI report is triggered.

2. The UE of claim 1, wherein the wireless device is further configured to transmit the aperiodic CSI report to the eNB through a physical uplink shared channel (PUSCH) in the wireless network.

3. The UE of claim 1, wherein the frame comprises any one or more of downlink (DL) subframes, uplink (UL) subframes, regular subframes, and flexible subframes, wherein the flexible subframe(s) are capable of being changed from UL subframes to DL subframes.

4. The UE of claim 1, wherein the value “

00”

indicates that no aperiodic CSI report is triggered.

5. The UE of claim 1, wherein the value “

01”

indicates that the aperiodic CSI report is triggered for at least one of

     1) one or more CSI processes and

     2) the one or more pairs of the comprising the CSI process and the CSI subframe measurement set configured by the higher layers for the at least one serving cell.

6. The UE of claim 5, wherein the value of “

10”

indicates that the aperiodic CSI report is triggered for at least one of a) a first set of the one or more CSI processes and b) a first pair of the one or more pairs comprising the CSI process and the corresponding CSI subframe measurement set configured by the higher layers.

7. The UE of claim 6, wherein the value of “

11”

indicates that the aperiodic CSI report is triggered for at least one of a) a second set of the one or more CSI processes and b) a second pair of the one or more pairs comprising the CSI process and the corresponding CSI subframe measurement set configured by the higher layers.

8. The UE of claim 1, wherein the UE is further configured to use the eIMTA with a coordinated multipoint (CoMP) transmission mechanism.

9. A method, employed by a user equipment (UE) to be used in a wireless network, comprising:

receiving, from an evolved NodeB (eNB) through a downlink control signal in the wireless network, a channel state information (CSI) request in a frame, wherein the CSI request comprises a CSI request field of two bits, and wherein the UE is configured by higher layers for enhanced interference mitigation and traffic adaptation (eIMTA) for at least one serving cell; and

generating an aperiodic CSI report if a value of the two bits of the CSI request field indicates that the aperiodic CSI report is triggered and if the value is associated with at least one or more pairs comprising a CSI process and a corresponding CSI subframe measurement set,

wherein the CSI subframe measurement set specifies which plurality of subframes of the frame are used to generate the aperiodic CSI report; and

, to discard the CSI request if the value of the two bits of the CSI request field indicates that no aperiodic CSI report is triggered.

10. The method of claim 9, further comprising:

transmitting the aperiodic CSI report to the eNB through a physical uplink shared channel (PUSCH) in the wireless network.

11. The method of claim 9, wherein the frame comprises any one or more of downlink (DL) subframes, uplink (UL) subframes, regular subframes, and flexible subframes, wherein the flexible subframe(s) are capable of being changed from UL subframes to DL subframes.

12. The method of claim 9, wherein the value “

00”

indicates that no aperiodic CSI report is triggered.

13. The method of claim 9, wherein the value is “

01”

indicating that the aperiodic CSI report is triggered for at least one of

     1) one or more CSI processes and

     2) the one or more pairs of the comprising the CSI process and the CSI subframe measurement set configured by the higher layers for the at least one serving cell.

14. The method of claim 13, wherein the value “

10”

indicates that the aperiodic CSI report is triggered for at least one of a) a first set of the one or more CSI processes and b) a first pair of the one or more pairs comprising the CSI process and the corresponding CSI subframe measurement set configured by the higher layers.

15. The method of claim 14, wherein the value “

11”

indicates that the aperiodic CSI report is triggered for the at least one of a) a second set of the one or more CSI processes and b) a second pair of the one or more pairs comprising the CSI process and the corresponding CSI subframe measurement set configured by the higher layers.

16. The method of claim 9, wherein the UE is further configured to use the eIMTA with a coordinated multipoint (CoMP) transmission mechanism.