Coupled mode common uplink burst in tdd subframe structure

Patent metadata

Field	Value
Publication number	US-2017164366-A1
Application number	US-201615211011-A
Country	US
Kind code	A1
Filing date	Jul 15, 2016
Priority date	Dec 4, 2015
Publication date	Jun 8, 2017
Grant date	—

Abstract

Wireless communications systems and methods related to a coupled mode common uplink burst in Time Division Duplex (TDD) sub-frame structure are disclosed. Upon receiving a signal requesting a user to transmit a sounding reference signal (SRS) and a control channel within a common uplink (UL) burst in each sub-frame communicated between the user and a base station, the user transmits the common UL burst comprising the SRS coupled with the control channel spanning the same frequency bandwidth.

First claim

What is claimed is:

1 . A method for wireless communications, comprising:
receiving, at a user equipment (UE) from a base station (BS), a signal requesting the UE to transmit a sounding reference signal (SRS) and a control channel within a common uplink (UL) burst in each sub-frame communicated between the UE and the BS; and transmitting, from the UE to the BS based upon the received signal, the common UL burst comprising the SRS and the control channel spanning the same frequency bandwidth in each downlink (DL) sub-frame and each UL centric sub-frame communicated between the UE and the BS.

2 . The method of claim 1 , wherein transmitting the common UL burst comprises:
transmitting the SRS and the control channel using single carrier waveforms.

3 . The method of claim 1 , further comprising:
transmitting, by the UE to the BS, an indication that the SRS and the control channel are coupled in the common UL burst.

4 . The method of claim 1 , wherein transmitting the common UL burst comprises:
transmitting low latency UL payload data.

5 . The method of claim 1 , wherein the control channel comprises at least one of: an acknowledgement (ACK), a negative acknowledgement (NACK), a scheduling request (SR), or a buffer status report (BSR).

6 . The method of claim 1 , further comprising:
transmitting, by the UE, the SRS in a first symbol of the common UL burst and the control channel in a second symbol of the common UL burst, wherein the first symbol and the second symbol comprise Time Division Duplex (TDD) symbols occupying the same frequency bandwidth.

7 . The method of claim 1 , further comprising:
spreading, by the UE, the SRS using a Zadoff-Chu sequence or a pseudo-random sequence before transmitting the SRS within the common UL burst; and modulating, by the UE, the spread SRS using Gaussian minimum shift keying (GMSK) modulation before transmitting the SRS within the common UL burst.

8 . The method of claim 1 , wherein transmitting the common UL burst comprises:
transmitting the control channel within the common UL burst using a Discrete Fourier Transform (DFT) spread Orthogonal Frequency Division Multiplexing (OFDM) based waveform or a Gaussian minimum shift keying (GMSK) based waveform.

9 . The method of claim 1 , wherein transmitting the common UL burst comprises:
transmitting the SRS and the control channel within the common UL burst using a shared region across a plurality of users.

10 . The method of claim 1 , further comprising:
receiving, at the UE from a network, a sequence unique for the UE; and spreading the SRS and the control channel using the received sequence before transmitting the SRS and the control channel within the common UL burst.

11 . The method of claim 1 , further comprising:
performing, by the UE, power control of the SRS and the control channel before transmitting the SRS and the control channel within the common UL burst.

12 . The method of claim 1 , further comprising:
receiving, at the UE from the BS, a signal to transmit the SRS and the control channel within the common UL burst; and transmitting, by the UE, the SRS and the control channel within the common UL burst based on the received signal.

13 . The method of claim 1 , further comprising:
transmitting, by the UE to the BS, a signal indicating that a beamforming direction of the SRS is different than another beamforming direction of another SRS transmitted prior to the SRS.

14 . An apparatus, comprising:
a receiver configured to receive, from another apparatus, a signal requesting the apparatus to transmit a sounding reference signal (SRS) and a control channel within a common uplink (UL) burst in each sub-frame communicated between the apparatus and the other apparatus; and a transmitter configured to transmit, to the other apparatus based upon the received signal, the common UL burst comprising the SRS and the control channel spanning the same frequency bandwidth in each downlink (DL) sub-frame and each UL centric sub-frame communicated between the apparatus and the other apparatus.

15 . The apparatus of claim 14 , wherein the transmitter is further configured to:
transmit the SRS and the control channel using single carrier waveforms.

16 . The apparatus of claim 14 , wherein the transmitter is further configured to:
transmit, to the other apparatus, an indication that the SRS and the control channel are coupled in the common UL burst.

17 . The apparatus of claim 14 , wherein the transmitter is further configured to:
transmit the common UL burst further comprising low latency payload data.

18 . The apparatus of claim 14 , wherein the control channel comprises at least one of: an acknowledgement (ACK), a negative acknowledgement (NACK), a scheduling request (SR), or a buffer status report (BSR).

19 . The apparatus of claim 14 , wherein the transmitter is further configured to:
transmit the SRS in a first symbol of the common UL burst and the control channel in a second symbol of the common UL burst, and wherein the first symbol and the second symbol comprise Time Division Duplex (TDD) symbols occupying the same frequency bandwidth.

20 . An apparatus, comprising:
means for receiving, from another apparatus, a signal requesting the apparatus to transmit a sounding reference signal (SRS) and a control channel within a common uplink (UL) burst in each sub-frame communicated between the apparatus and the other apparatus; and means for transmitting, to the other apparatus based upon the received signal, the common UL burst comprising the SRS and the control channel spanning the same frequency bandwidth in each downlink (DL) sub-frame and each UL centric sub-frame communicated between the apparatus and the other apparatus.

21 . The apparatus of claim 20 , wherein the means for transmitting is further configured to:
transmit the SRS and the control channel using single carrier waveforms.

22 . The apparatus of claim 20 , wherein the means for transmitting is further configured to:
transmit, to the other apparatus, an indication that the SRS and the control channel are coupled in the common UL burst.

23 . The apparatus of claim 20 , wherein the means for transmitting is further configured to:
transmit the common UL burst comprising low latency UL payload data.

24 . The apparatus of claim 20 , wherein the control channel comprises at least one of: an acknowledgement (ACK), a negative acknowledgement (NACK), a scheduling request (SR), or a buffer status report (BSR).

25 . The apparatus of claim 20 , wherein the means for transmitting is further configured to:
transmit the SRS in a first symbol of the common UL burst and the control channel in a second symbol of the common UL burst, and wherein the first symbol and the second symbol comprise Time Division Duplex (TDD) symbols occupying the same frequency bandwidth.

26 . A computer-readable medium having program code recorded thereon, the program code comprising:
code for causing a user equipment (UE) to receive, from a base station (BS), a signal requesting the UE to transmit a sounding reference signal (SRS) and a control channel within a common uplink (UL) burst in each sub-frame communicated between the UE and the BS; and code for causing the UE to transmit, to the BS based upon the received signal, the common UL burst comprising the SRS and the control channel spa

Assignees

• Qualcomm Inc

Inventors

• Zeng Wei
• Soriaga Joseph Binamira
• Manolakos Alexandros
• Ji Tingfang

Classifications

• H04L5/14

  Two-way operation using the same type of signal, i.e. duplex · CPC title

• H04L5/0053

  Allocation of signalling, i.e. of overhead other than pilot signals · CPC title

• H04W88/02

  Terminal devices · CPC title

• H04L5/005

  of common pilots, i.e. pilots destined for multiple users or terminals · CPC title

• H04W72/0453 Primary

  Resources in frequency domain, e.g. a carrier in FDMA · CPC title