NARROWBAND TIME-DIVISION DUPLEX FRAME STRUCTURE FOR NARROWBAND COMMUNICATIONS

• US 20180248674A1
• Filed: 09/20/2017
• Published: 08/30/2018
• Est. Priority Date: 02/28/2017
• Status: Active Grant

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: BHATTAD, Kapil, WANG, Xiao feng, RICO ALVARINO, Alberto, XU, Hao
• Granted Patent: US 10,454,658 B2
• Time in Patent Office: Days
• CPC Class Codes: H04L 1/0067 Rate matching H04L1/0013 and H04L1/08 take precedence
• CPC Class Codes: H04L 1/0068 by puncturing
• CPC Class Codes: H04L 1/08 by repeating transmission, e.g. Verdan system H04L1/1858 and H04L1/189 take precedence
• CPC Class Codes: H04L 25/02 Details ; arrangements for supplying electrical power along data transmission lines systems for transmitting signals via power distribution lines H04B3/54
• CPC Class Codes: H04L 25/0226 sounding signals per se
• CPC Class Codes: H04L 27/261 Details of reference signals
• CPC Class Codes: H04L 27/2613 Structure of the reference signals
• CPC Class Codes: H04L 5/0005 Time-frequency
• CPC Class Codes: H04L 5/0007 the frequencies being orthogonal, e.g. OFDM(A), DMT
• CPC Class Codes: H04L 5/001 the frequencies being arranged in component carriers
• CPC Class Codes: H04L 5/0012 Hopping in multicarrier systems for frequency hopping in spread spectrum systems H04B1/713
• CPC Class Codes: H04L 5/0026 Division using four or more dimensions
• CPC Class Codes: H04L 5/0048 Allocation of pilot signals, i.e. of signals known to the receiver
• CPC Class Codes: H04L 5/0053 Allocation of signaling, i.e. of overhead other than pilot signals
• 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 5/0092 Indication of how the channel is divided
• CPC Class Codes: H04L 5/14 Two-way operation using the same type of signal, i.e. duplex
• CPC Class Codes: H04L 5/1469 using time-sharing
• CPC Class Codes: H04L 5/22 using time-division multiplexing
• CPC Class Codes: H04L 5/26 combined with the use of different frequencies
• 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 72/0466 : the resource being a scrambling code
• 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 74/0833 : Random access procedures, e.g. with 4-step access

Abstract

There is a need to support narrowband TDD frame structure for narrowband communications. The present disclosure provides a solution by supporting one or more narrowband TDD frame structure(s) for narrowband communications. In an aspect of the disclosure, a method, a computer-readable medium, and an apparatus are provided. In one aspect, the apparatus may receive information associated with a narrowband TDD frame structure for narrowband communications, the narrowband TDD frame structure including a set of contiguous uplink subframes. The apparatus may also determine an orthogonal sequence length associated with a reference signal (RS) based on at least one of a number of uplink subframes or a number of slots in the set of contiguous uplink subframes. In addition, the apparatus may transmit the RS using the determined orthogonal sequence length.

Claims

1. A method for wireless communication for a user equipment (UE), comprising:

receiving information associated with a narrowband time-division duplex (TDD) frame structure for narrowband communications, the narrowband TDD frame structure including a set of contiguous uplink subframes; and

determining an orthogonal sequence length associated with a reference signal (RS) based on at least one of a number of uplink subframes or a number of slots in the set of contiguous uplink subframes; and

transmitting the RS using the determined orthogonal sequence length.

2. A method for wireless communication for a user equipment (UE), comprising:

receiving information associated with a narrowband time-division duplex (TDD) frame structure for narrowband communications;

determining a sequence hopping pattern associated with a reference signal (RS) based on at least one of a number of uplink subframes, a number of slots in a set of contiguous uplink subframes, or a radio frame number; and

transmitting the RS using the determined sequence hopping pattern.

3. An apparatus for wireless communication for a user equipment (UE), comprising:

means for receiving information associated with a narrowband time-division duplex (TDD) frame structure for narrowband communications, the narrowband TDD frame structure including a set of contiguous uplink subframes; and

means for determining an orthogonal sequence length associated with a reference signal (RS) based on at least one of a number of uplink subframes or a number of slots in the set of contiguous uplink subframes; and

means for transmitting the RS using the determined orthogonal sequence length.

4. An apparatus for wireless communication for a user equipment (UE), comprising:

means for receiving information associated with a narrowband time-division duplex (TDD) frame structure for narrowband communications;

means for determining a sequence hopping pattern associated with a reference signal (RS) based on at least one of a number of uplink subframes, a number of slots in a set of contiguous uplink subframes, or a radio frame number; and

means for transmitting the RS using the determined sequence hopping pattern.

5. An apparatus for wireless communication for a user equipment (UE), comprising:

a memory; and

at least one processor coupled to the memory and configured to;

receive information associated with a narrowband time-division duplex (TDD) frame structure for narrowband communications, the narrowband TDD frame structure including a set of contiguous uplink subframes; and

determine an orthogonal sequence length associated with a reference signal (RS) based on at least one of a number of uplink subframes or a number of slots in the set of contiguous uplink subframes; and

transmit the RS using the determined orthogonal sequence length.

6. An apparatus for wireless communication for a user equipment (UE), comprising:

a memory; and

at least one processor coupled to the memory and configured to;

receive information associated with a narrowband time-division duplex (TDD) frame structure for narrowband communications;

determine a sequence hopping pattern associated with a reference signal (RS) based on at least one of a number of uplink subframes, a number of slots in a set of contiguous uplink subframes, or a radio frame number; and

transmit the RS using the determined sequence hopping pattern.

7. A computer-readable medium storing computer executable code for a user equipment (UE), comprising code to:

receive information associated with a narrowband time-division duplex (TDD) frame structure for narrowband communications, the narrowband TDD frame structure including a set of contiguous uplink subframes; and

determine an orthogonal sequence length associated with a reference signal (RS) based on at least one of a number of uplink subframes or a number of slots in the set of contiguous uplink subframes; and

transmit the RS using the determined orthogonal sequence length.

8. A computer-readable medium storing computer executable code for a user equipment (UE), comprising code to:

receive information associated with a narrowband time-division duplex (TDD) frame structure for narrowband communications;

determine a sequence hopping pattern associated with a reference signal (RS) based on at least one of a number of uplink subframes, a number of slots in a set of contiguous uplink subframes, or a radio frame number; and

transmit the RS using the determined sequence hopping pattern.