Dynamical time division duplex uplink and downlink configuration in a communications network

• US 10,638,490 B2
• Filed: 07/12/2018
• Issued: 04/28/2020
• Est. Priority Date: 07/26/2013
• Status: Active Grant

• Current Assignee: Apple Inc.
• Original Assignee: Intel IP Corporation (Intel Corporation)
• Inventors: He, Hong, Fwu, Jong-Kae, Khoryaev, Alexey, Heo, Youn Hyoung
• Primary Examiner(s): Mered, Habte
• Application Number:
  US16/034,177
• Publication Number:
  US 20180338313A1
• Time in Patent Office: 656 Days
• CPC Class Codes: H01Q 1/243 with built-in antennas
• CPC Class Codes: H01Q 3/00 Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system means for positioning H01Q1/125
• CPC Class Codes: H04B 17/318 Received signal strength
• CPC Class Codes: H04B 7/0632 Channel quality parameters, e.g. channel quality indicator [CQI]
• CPC Class Codes: H04B 7/0686 Hybrid systems, i.e. switching and simultaneous transmission
• CPC Class Codes: H04B 7/0695 using beam selection
• 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: H04L 5/0007 the frequencies being orthogonal, e.g. OFDM(A), DMT
• CPC Class Codes: H04L 5/0094 Indication of how sub-channels of the path are allocated
• CPC Class Codes: H04L 5/14 Two-way operation using the same type of signal, i.e. duplex
• CPC Class Codes: H04L 69/16 Implementation or adaptation of Internet protocol [IP], of transmission control protocol [TCP] or of user datagram protocol [UDP]
• CPC Class Codes: H04W 16/28 using beam steering
• CPC Class Codes: H04W 24/02 Arrangements for optimising 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 28/12 using signalling between network elements
• CPC Class Codes: H04W 36/0066 of control information between different types of networks in order to establish a new radio link in the target network
• CPC Class Codes: H04W 36/0072 of resource information of target access point
• CPC Class Codes: H04W 36/0083 Determination of parameters used for hand-off, e.g. generation or modification of neighbour cell lists
• CPC Class Codes: H04W 36/30 by measured or perceived connection quality data
• CPC Class Codes: H04W 4/70 : Services for machine-to-machine communication [M2M] or machine type communication [MTC]
• CPC Class Codes: H04W 52/0209 : in terminal devices terminal devices per se H04W88/02
• 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 72/541 : using the level of interference
• CPC Class Codes: H04W 74/0833 : Random access procedures, e.g. with 4-step access
• 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 76/27 : Transitions between radio resource control [RRC] states
• CPC Class Codes: H04W 84/045 : using private Base Stations, e.g. femto Base Stations, home Node B
• CPC Class Codes: H04W 84/12 : WLAN [Wireless Local Area Networks]
• CPC Class Codes: H04W 84/18 : Self-organising networks, e.g. ad-hoc networks or sensor 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: Y02D 30/70 : in wireless communication networks

Abstract

A technology is disclosed for an evolved Node B (eNB) operable to transmit a physical downlink control channel (PDCCH) to a user equipment (UE). The eNB can determine a set of configuration indication fields numbered 1 to N, included in a downlink control information (DCI) format Y carried on the PDCCH, where

$N=\lfloor \frac{L_{\mathrm{format}Y}}{M}\rfloor ,$
L_{format Y} is equal to a payload size of the DCI format Y, and M is a number of bits of each configuration indication field. The eNB can map the DCI format Y onto the PDCCH. The eNB can transmit to the UE the PDCCH with a cyclic redundancy check (CRC) scrambled by an enhanced interference mitigation and traffic adaptation (eIMTA) Radio-Network Temporary Identifier (RNTI) for the UE.

Claims

1. An evolved Node B (eNB) operable to transmit a physical downlink control channel (PDCCH) to a user equipment (UE), the eNB comprising:

one or more processors configured to;

determine, at the eNB, a set of configuration indication fields numbered 1 to N, included in a downlink control information (DCI) format Y carried on the PDCCH, where

2. The eNB of claim 1, wherein the transceiver is further configured to transmit the PDCCH to the UE for reconfiguring a time division duplex (TDD) uplink and downlink (UL/DL) configuration at the UE, wherein the PDCCH is mapped to the DCI format Y, and the DCI format Y is included in a TDD UL/DL configuration indication.

3. The eNB of claim 1, wherein the DCI format Y is a format 1C.

4. The eNB of claim 1, wherein M=3.

5. The eNB of claim 1, wherein the one or more processors are further configured to append one or more bits, with a predefined value of zero, to the set of configuration indication fields, until a total number of bits of the N configuration indication fields is equal to the payload size of the DCI format Y.

6. The eNB of claim 1, wherein the transceiver is further configured to transmit the eIMTA-RNTI to the UE to enable the UE to decode the PDCCH.

7. The eNB of claim 1, wherein the transceiver is further configured to transmit a time domain duplex (TDD) uplink and downlink (UL/DL) configuration index to the UE using radio resource control (RRC) signaling, wherein the TDD UL/DL configuration index is for the set of configuration indication fields numbered 1 to N.

8. The eNB of claim 1, wherein the transceiver is further configured to receive a message from the UE that indicates that the UE supports a time division duplex (TDD) uplink and downlink (UL/DL) reconfiguration functionality.

9. The eNB of claim 1, wherein the one or more processors are further configured to map the DCI format Y onto a common search space (CSS) of the PDCCH for transmission to the UE.

10. A user equipment (UE) operable to reconfigure a time division duplex (TDD) uplink and downlink configuration, the UE comprising:

a transceiver configured to;

receive, at the UE, an uplink and downlink (UL/DL) configuration indication from an eNB for a TDD reconfiguration, the UL/DL configuration indication comprising a set of configuration indication fields numbered 1 to N, included in a downlink control information (DCI) format Y carried on a physical downlink control channel (PDCCH), where

11. The UE of claim 10, wherein the DCI format Y is a format 1C.

12. The UE of claim 10, wherein M=3.

13. The UE of claim 10, wherein one or more bits are appended, with a predefined value of zero, to the set of configuration indication fields, until a total number of bits of the N configuration indication fields is equal to the payload size of the DCI format Y.

14. The UE of claim 10, wherein the transceiver is further configured to receive a time domain duplex (TDD) uplink and downlink (UL/DL) configuration index from the eNB using radio resource control (RRC) signaling, wherein the TDD UL/DL configuration index is for the set of configuration indication fields numbered 1 to N.

15. The UE of claim 10, wherein the transceiver is further configured to transmit a message to the eNB that indicates that the UE supports a TDD UL-DL reconfiguration functionality.

16. A user equipment (UE) operable to modify an uplink/downlink (UL/DL) configuration, the UE comprising:

a transceiver configured to;

send, to an eNodeB, a request for a radio resource control (RRC) connection with the eNodeB;

transmit, to the eNodeB, a UE Capability information element (IE) that indicates an enhanced interference mitigation and traffic adaptation (eIMTA) capability of the UE to support an eIMTA time duplex domain (TDD) UL/DL reconfiguration functionality; and

receive, from the eNodeB, eIMTA configuration information via a radio resource control (RRC) message in response to transmitted the UE Capability IE from the UE to the eNodeB, wherein the RRC message includes an eIMTA Radio-Network Temporary Identifier (RNTI); and

memory configured to store the eIMTA configuration information.

17. The UE of claim 16, further comprising one or more processors configured to:

attempt to decode an UL/DL reconfiguration PDCCH with a cyclic redundancy check (CRC) scrambled by the assigned eIMTA-RNTI; and

determine UL/DL configuration information from a decoded UL/DL reconfiguration PDCCH based on the assigned indicator field index.

18. The UE of claim 17, wherein the UL/DL reconfiguration PDCCH includes N TDD UL/DL Configuration Indicator (TCI) fields, where N is determines using

19. The UE of claim 18, wherein zero-padding information bits are appended to TDD UL/DL configuration indicator fields until a UL/DL reconfiguration PDCCH size is equal to a format Y size mapped onto the common search space.

20. The UE of claim 16, further comprising one or more processors configured to monitor one common search space (CSS) on a Primary Cell (PCell) to receive the UL/DL reconfiguration PDCCH with CRC scrambled by the eIMTA-RNTI assigned for the UE.