Systems and Methods of Adaptive Frame Structure for Time Division Duplex

Patent metadata

Field	Value
Publication number	US-2016353475-A1
Application number	US-201615160707-A
Country	US
Kind code	A1
Filing date	May 20, 2016
Priority date	May 29, 2015
Publication date	Dec 1, 2016
Grant date	—

Abstract

A time division duplex (TDD) scheduling interval communicating transmissions in a first direction may include one or more regions for communicating in a second direction, where the first direction is a transmit direction and the second direction is a receive direction, or vice versa. A radio frame may include TDD scheduling intervals with such regions and/or TDD scheduling intervals without such regions for wireless communication, and these TDD scheduling intervals may further be configured in accordance with different frame structure configurations, such as different scheduling interval lengths, subcarrier spacings or symbol durations.

First claim

What is claimed is:

1 . A method for wireless communications, comprising:
communicating, by a device, a first data transmission in a first time division duplexing (TDD) scheduling interval in a first direction, the first TDD scheduling interval being configured with a first frame structure configuration; and communicating, by the device, a second data transmission in the first TDD scheduling interval in a second direction, one of the first direction and the second direction being a transmit direction, and the other of the first direction and the second direction being a receive direction.

2 . The method of claim 1 , further comprising signaling, to a user equipment, at least the first frame structure configuration or configuration information of the first TDD scheduling interval.

3 . The method of claim 1 , wherein the first data transmission and the second data transmission are communicated over different frequency resources.

4 . The method of claim 1 , wherein the first data transmission and the second data transmission are communicated over the same frequency sub-band.

5 . The method of claim 1 , wherein the device is a base station or a user equipment.

6 . The method of claim 1 , wherein the first TDD scheduling interval further includes a guard period separating the first data transmission and the second data transmission in the time domain.

7 . The method of claim 1 , wherein the first data transmission or the second data transmission is communicated grant-free.

8 . The method of claim 7 , wherein the first data transmission or the second data transmission is communicated in accordance with a contention-based mechanism.

9 . The method of claim 1 , wherein the first TDD scheduling interval is a downlink scheduling interval including an uplink transmission opportunity.

10 . The method of claim 9 , further comprising communicating, in the downlink scheduling interval, an acknowledgement/negative acknowledgement (ACK/NAK) message traveling in the uplink direction, the ACK/NACK message confirming whether a previous downlink data transmission was successfully received.

11 . The method of claim 10 , wherein the ACK/NAK message and an uplink data transmission are transmitted over different frequency resources in the downlink scheduling interval or over the same frequency sub-band during different time periods in the downlink scheduling interval, the uplink data transmission being one of the first data transmission or the second data transmission.

12 . The method of claim 1 , wherein the first TDD scheduling interval is an uplink scheduling interval including a downlink transmission opportunity.

13 . The method of claim 12 , further comprising communicating, in the uplink scheduling interval, an acknowledgement/non-acknowledgement (ACK/NAK) message traveling in the downlink direction, the ACK/NACK message confirming whether a previous uplink data transmission was successfully received.

14 . The method of claim 13 , wherein the ACK/NAK message and a downlink data transmission are transmitted over different frequency resources during the same time period in the uplink scheduling interval, or over the same frequency sub-band during different time periods in the uplink scheduling interval, the downlink data transmission being one of the first data transmission or the second data transmission.

15 . The method of claim 1 , further comprising:
communicating a third data transmission in a second TDD scheduling interval configured with a second frame structure configuration, the second frame structure configuration being different from the first frame structure configuration.

16 . The method of claim 15 , wherein the first TDD scheduling interval and the second TDD scheduling interval have different lengths.

17 . The method of claim 15 , wherein the first TDD scheduling interval and the second TDD scheduling interval are assigned to different frequency sub-bands.

18 . The method of claim 15 , wherein the first data transmission in the first TDD scheduling interval and the third data transmission in the second TDD scheduling interval are communicated in accordance with different subcarrier spacings, or different cyclic prefix lengths.

19 . The method of claim 15 , further comprising:
communicating an acknowledgement/non-acknowledgement (ACK/NAK) message in the second TDD scheduling interval, the third data transmission being communicated in a transmit direction and the ACK/NAK message being communicated in a receive direction, or vice versa.

20 . A method for wireless communications, comprising:
assigning, by a network controller, a first frame structure configuration for communicating in a first time division duplexing (TDD) scheduling interval in a first direction over a first frequency sub-band, the first frame structure configuration corresponding to a first set of frame parameters; selecting, by the network controller, a switching type for the first TDD scheduling interval, the switching type indicating whether or not the first TDD scheduling interval includes at least one transmission opportunity for communicating in a second direction, wherein one of the first direction and the second direction being a transmit direction, and the other of the first direction and the second direction being a receive direction; and sending an indication indicating communication of orthogonal frequency division multiplexing (OFDM) signals in the first TDD scheduling interval in accordance with the first set of frame parameters and the selected switching type.

21 . The method of claim 20 , wherein the first frame structure configuration is assigned in accordance with a traffic type of data communicated in the first TDD scheduling interval, the number of user equipments being served by a base station, a latency requirement, or a request from a user equipment.

22 . The method of claim 20 , wherein the switching type is selected in accordance with the first frame structure configuration, a latency requirement, or a request from a user equipment.

23 . The method of claim 20 , wherein the first set of frame parameters comprises a subcarrier spacing, a scheduling interval length, an OFDM symbol duration, or a cyclic prefix length.

24 . The method of claim 20 , further comprising:
assigning a second frame structure configuration for communicating in a second TDD scheduling interval over the first frequency sub-band, the second frame structure configuration corresponding to a second set of frame parameters different than the first set of frame parameters.

25 . The method of claim 20 , further comprising:
assigning a second frame structure configuration for communicating in a second TDD scheduling interval over a second frequency sub-band, the second frame structure configuration corresponding to a second set of frame parameters different than the first set of frame parameters.

26 . A method for wireless communications, comprising:
communicating, by a device, a first transmission in a first time division duplexing (TDD) scheduling interval in a first direction in a first frequency sub-band; communicating, by the device, a second transmission in the first TDD scheduling interval in a second direction in the first frequency sub-band, one of the first direction and the second direction being a transmit direction, and the other of the first direction and the second direction being a

Assignees

• Huawei Tech Co Ltd

Inventors

• Au Kelvin Kar Kin
• Ma Jianglei
• Zhang Liqing
• Qiu Jing

Classifications

• H04W72/23

  in the downlink direction of a wireless link, i.e. towards a terminal · CPC title

• H04L5/14

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

• H04L5/0055 Primary

  Physical resource allocation for ACK/NACK (for physical mapping arrangements in ARQ protocols H04L1/1861) · CPC title

• H04W72/1278 Primary

  Electricity · mapped topic

• H04L5/0042

  Intra-user or intra-terminal allocation · CPC title