Time division duplex (TDD) uplink downlink (UL-DL) reconfiguration

• US 9,844,054 B2
• Filed: 04/22/2016
• Issued: 12/12/2017
• Est. Priority Date: 06/28/2013
• Status: Active Grant

• Current Assignee: Apple Inc.
• Original Assignee: Intel Corporation
• Inventors: He, Hong, Khoryaev, Alexey, Panteleev, Sergey, Fwu, Jong-Kae
• Primary Examiner(s): Javaid, Jamal
• Application Number:
  US15/136,743
• Publication Number:
  US 20160255628A1
• Time in Patent Office: 599 Days
• 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 7/0452 Multi-user MIMO systems
• CPC Class Codes: H04B 7/0626 Channel coefficients, e.g. channel state information [CSI]
• CPC Class Codes: H04J 11/005 of intercell interference
• CPC Class Codes: H04L 12/18 for broadcast or conference , e.g. multicast
• CPC Class Codes: H04L 25/021 Estimation of channel covariance
• CPC Class Codes: H04L 25/0242 using matrix methods
• CPC Class Codes: H04L 25/03891 Spatial equalizers MIMO diversity systems H04B7/0413
• CPC Class Codes: H04L 5/1469 using time-sharing
• CPC Class Codes: H04W 16/14 Spectrum sharing arrangements between different networks
• CPC Class Codes: H04W 24/10 Scheduling measurement reports ; Arrangements for measurement reports
• CPC Class Codes: H04W 36/02 Buffering or recovering information during reselection ; Modification of the traffic flow during hand-off
• CPC Class Codes: H04W 48/12 using downlink control channel
• CPC Class Codes: H04W 48/16 Discovering, processing access restriction or access information
• CPC Class Codes: H04W 56/0005 synchronizing of arrival of multiple uplinks
• CPC Class Codes: H04W 68/04 multi-step notification using statistical or historical mobility data
• CPC Class Codes: H04W 72/02 Selection of wireless resources by user or terminal
• CPC Class Codes: H04W 72/0446 Resources in time domain, e.g. slots or frames
• CPC Class Codes: H04W 72/20 Control channels or signalling for resource management
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal
• CPC Class Codes: H04W 74/004 : in the uplink, i.e. towards network
• CPC Class Codes: H04W 74/006 : in the downlink, i.e. towards the terminal
• CPC Class Codes: H04W 74/0816 : with collision avoidance
• CPC Class Codes: H04W 76/10 : Connection setup
• CPC Class Codes: H04W 76/19 : Connection re-establishment
• CPC Class Codes: H04W 76/30 : Connection release
• CPC Class Codes: H04W 8/005 : Discovery of network devices, e.g. terminals
• CPC Class Codes: H04W 84/045 : using private Base Stations, e.g. femto Base Stations, home Node B
• CPC Class Codes: H04W 84/18 : Self-organising networks, e.g. ad-hoc networks or sensor networks
• 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

Abstract

An evolved node (eNB) operable to transmit a Time Division Duplex (TDD) uplink-downlink (UL-DL) reconfiguration in a heterogeneous network (HetNet) is disclosed. The eNB can receive, from a user equipment (UE), a UE capability report that indicates the UE supports a TDD UL-DL reconfiguration functionality. The eNB can transmit, to the UE, a configuration to enable TDD UL-DL reconfiguration at the UE. The eNB can transmit, to the UE, a TDD UL-DL reconfiguration signal in a downlink control information (DCI) message. The UE can be configured to update a TDD UL-DL configuration of the UE based on the TDD UL-DL reconfiguration signal transmitted on a physical downlink control channel (PDCCH) in preconfigured downlink or special (DL/S) subframes by the eNB.

Claims

1. An apparatus of an eNodeB operable to perform Enhanced Interference Mitigation &

Traffic Adaptation (eIMTA), the apparatus comprising one or more processors configured to;

select, at the eNodeB, a radio network temporary identifier (RNTI) used for eIMTA;

select, at the eNodeB, a periodicity for monitoring a physical downlink control channel (PDCCH) with the RNTI used for eIMTA;

select, at the eNodeB, a set of subframes to monitor the PDCCH with the RNTI used for eIMTA within the periodicity; and

encode, at the eNodeB for transmission to a user equipment (UE), the RNTI used for eIMTA, the periodicity for monitoring the PDCCH with the RNTI used for eIMTA, and the set of subframes to monitor the PDCCH with the RNTI used for eIMTA.

2. The apparatus of claim 1, further comprising a transceiver configured to transmit to the UE:

the RNTI used for eIMTA;

the periodicity for monitoring the PDCCH with the RNTI used for eIMTA; and

the set of subframes to monitor the PDCCH with the RNTI used for eIMTA.

3. The apparatus of claim 1, further comprising memory configured to store:

the RNTI used for eIMTA, the periodicity for monitoring the PDCCH with the RNTI used for eIMTA, and the set of subframes to monitor the PDCCH with the RNTI used for eIMTA.

4. The apparatus of claim 1, wherein the one or more processors are further configured to:

process an uplink-downlink (UL-DL) configuration received from a second eNodeB, wherein the UL-DL configuration is utilized by the second eNodeB; and

select an UL-DL configuration for eIMTA based on the UL-DL configuration received from the second eNodeB.

5. The apparatus of claim 1, wherein the set of subframes to monitor the PDCCH with the RNTI used for eIMTA is represented using a defined number of bits, wherein a bit value of “

1”

indicates that the PDCCH with the RNTI used for eIMTA on a corresponding subframe is to be monitored by the UE, and a bit value of “

0”

indicates that the PDCCH with the RNTI used for eIMTA on a corresponding subframe is to not be monitored by the UE.

6. The apparatus of claim 1, wherein the set of subframes to monitor the PDCCH with the RNTI used for eIMTA includes downlink subframes indicated by an UL-DL configuration in a system information block 1 (SIB1).

7. The apparatus of claim 6, wherein the downlink subframes indicated by the UL-DL configuration in the SIB1 is for time division duplexing (TDD).

8. The apparatus of claim 1, wherein the periodicity for monitoring the PDCCH with the RNTI used for eIMTA is one of:

10 milliseconds (ms), 20 ms, 40 ms or 80 ms.

9. An apparatus of a user equipment (UE) operable perform Enhanced Interference Mitigation &

Traffic Adaptation (eIMTA), the apparatus comprising one or more processors configured to;

process, at the UE, an eIMTA configuration received from an eNodeB, wherein the eIMTA configuration includes;

a radio network temporary identifier (RNTI) used for eIMTA;

a periodicity for monitoring a physical downlink control channel (PDCCH) with the RNTI used for eIMTA; and

a set of subframes to monitor the PDCCH with the RNTI used for eIMTA; and

monitor, at the UE, the PDCCH with the RNTI used for eIMTA in the set of subframes indicated in the eIMTA configuration.

10. The apparatus of claim 9, further comprising a transceiver configured to receive the eIMTA configuration from the eNodeB.

11. The apparatus of claim 9, further comprising memory configured to store the eIMTA configuration from the eNodeB.

12. The apparatus of claim 9, wherein the set of subframes to monitor the PDCCH with the RNTI used for eIMTA is represented using a defined number of bits, wherein a bit value of “

1”

indicates that the PDDCH with the RNTI used for eIMTA on a corresponding subframe is to be monitored by the UE, and a bit value of “

0”

indicates that the PDCCH with the RNTI used for eIMTA on a corresponding subframe is to not be monitored by the UE.

13. The apparatus of claim 9, wherein the set of subframes to monitor the PDCCH with the RNTI used for eIMTA includes downlink subframes indicated by an uplink-downlink (UL-DL) configuration in a system information block 1 (SIB1), and the downlink subframes indicated by the UL-DL configuration in the SIB1 is for time division duplexing (TDD).

14. The apparatus of claim 9, wherein the periodicity for monitoring the PDCCH with the RNTI used for eIMTA is one of:

10 milliseconds (ms), 20 ms, 40 ms or 80 ms.

15. The apparatus of claim 9, wherein the UE includes at least one of:

an antenna, a display screen, a speaker, a microphone, a graphics processor, an application processor, an internal memory, or a non-volatile memory port.

16. At least one non-transitory machine readable storage medium having instructions embodied thereon for performing Enhanced Interference Mitigation &

Traffic Adaptation (eIMTA) at an eNodeB, the instructions when executed by one or more processors at the eNodeB perform the following;

selecting, at the eNodeB, a radio network temporary identifier (RNTI) used for eIMTA;

selecting, at the eNodeB, a periodicity for monitoring a physical downlink control channel (PDCCH) with the RNTI used for eIMTA;

selecting, at the eNodeB, a set of subframes to monitor the PDCCH with the RNTI used for eIMTA within the periodicity; and

encoding, at the eNodeB for transmission to a user equipment (UE), the RNTI used for eIMTA, the periodicity for monitoring the PDCCH with the RNTI used for eIMTA, and the set of subframes to monitor the PDCCH with the RNTI used for eIMTA.

17. The at least one non-transitory machine readable storage medium of claim 16, further comprising instructions when executed perform the following:

processing an uplink-downlink (UL-DL) configuration received from a second eNodeB, wherein the UL-DL configuration is utilized by the second eNodeB; and

selecting an UL-DL configuration for eIMTA based on the UL-DL configuration received from the second eNodeB.

18. The at least one non-transitory machine readable storage medium of claim 16, wherein the set of subframes to monitor the PDCCH with the RNTI used for eIMTA is represented using a defined number of bits, wherein a bit value of “

1”

indicates that the PDCCH with the RNTI used for eIMTA on a corresponding subframe is to be monitored by the UE, and a bit value of “

0”

indicates that the PDCCH with the RNTI used for eIMTA on a corresponding subframe is to not be monitored by the UE.

19. The at least one non-transitory machine readable storage medium of claim 16, wherein the set of subframes to monitor the PDCCH with the RNTI used for eIMTA includes downlink subframes indicated by an UL-DL configuration in a system information block 1 (SIB1), and the downlink subframes indicated by the UL-DL configuration in the SIB1 is for time division duplexing (TDD).

20. The at least one non-transitory machine readable storage medium of claim 16, wherein the periodicity for monitoring the PDCCH with the RNTI used for eIMTA is one of:

10 milliseconds (ms), 20 ms, 40 ms or 80 ms.

21. At least one non-transitory machine readable storage medium having instructions embodied thereon for performing Enhanced Interference Mitigation &

Traffic Adaptation (eIMTA) at a user equipment (UE), the instructions when executed by one or more processors at the UE perform the following;

processing, at the UE, an eIMTA configuration received from an eNodeB, wherein the eIMTA configuration includes;

a radio network temporary identifier (RNTI) used for eIMTA;

a periodicity for monitoring a physical downlink control channel (PDCCH) with the RNTI used for eIMTA; and

a set of subframes to monitor the PDCCH with the RNTI used for eIMTA; and

monitoring, at the UE, the PDCCH with the RNTI used for eIMTA in the set of subframes indicated in the eIMTA configuration.

22. The at least one non-transitory machine readable storage medium of claim 21, wherein the set of subframes to monitor the PDCCH with the RNTI used for eIMTA is represented using a defined number of bits, wherein a bit value of “

1”

indicates that the PDDCH with the RNTI used for eIMTA on a corresponding subframe is to be monitored by the UE, and a bit value of “

0”

indicates that the PDCCH with the RNTI used for eIMTA on a corresponding subframe is to not be monitored by the UE.

23. The at least one non-transitory machine readable storage medium of claim 21, wherein the set of subframes to monitor the PDCCH with the RNTI used for eIMTA includes downlink subframes indicated by an uplink-downlink (UL-DL) configuration in a system information block 1 (SIB1), and the downlink subframes indicated by the UL-DL configuration in the SIB1 is for time division duplexing (TDD).

24. The at least one non-transitory machine readable storage medium of claim 21, wherein the periodicity for monitoring the PDCCH the RNTI used for eIMTA is one of:

10 milliseconds (ms), 20 ms, 40 ms or 80 ms.