Systems and methods for association timing

Patent metadata

Field	Value
Publication number	US-10165564-B2
Application number	US-201715417080-A
Country	US
Kind code	B2
Filing date	Jan 26, 2017
Priority date	Jan 28, 2016
Publication date	Dec 25, 2018
Grant date	Dec 25, 2018

Abstract

A user equipment (UE) is described. The UE includes a processor and memory in electronic communication with the processor. Instructions stored in the memory are executable to configure a slot-long shortened transmission time interval (S-TTI) in a serving cell, the slot-long S-TTI being used for physical downlink shared channel (PDSCH) reception in the serving cell. The instructions are also executable to determine PDSCH Hybrid Automatic Repeat Request Acknowledgement/Negative Acknowledgement (HARQ-ACK) transmission timing for the serving cell, the PDSCH HARQ-ACK transmission timing being determined based on a downlink (DL) association set pre-defined for the slot-long S-TTI. The instructions are further executable to send PDSCH HARQ-ACK information using the slot-long S-TTI, based on the PDSCH HARQ-ACK transmission timing.

First claim

What is claimed is:

1. A user equipment (UE) comprising:
receiving circuitry configured to receive a physical downlink shared channel (PDSCH); and
transmitting circuitry configured to transmit a Hybrid Automatic Repeat Request Acknowledgement/Negative Acknowledgement (HARQ-ACK) response for the PDSCH, wherein
in a case that a short transmission time interval (TTI) is not configured, the HARQ-ACK response is based on a first downlink (DL) association set, the first DL association set specifying downlink subframe(s) associated with each of subframe 0 to subframe 9, and
in a case that the short TTI is configured, the HARQ-ACK response is based on a second DL association set, the second DL association set specifying downlink slot(s) associated with each of slot 0 to slot 19.

2. The UE of claim 1 , wherein
the first DL association set specifying that no downlink subframe is associated with one or more subframes among the subframe 0 to the subframe 9, and
the second DL association set specifying that no downlink slot is associated with one or more slots among the slot 0 to the slot 19.

3. An evolved node B (eNB) comprising:
transmitting circuitry configured to transmit a physical downlink shared channel (PDSCH); and
receiving circuitry configured to receive a Hybrid Automatic Repeat Request Acknowledgement/Negative Acknowledgement (HARQ-ACK) response for the PDSCH, wherein
in a case that a short transmission time interval (TTI) is not configured, the HARQ-ACK response is based on a first downlink (DL) association set table, the first DL association set specifying downlink subframe(s) associated with each subframe 0 to subframe 9, and
in a case that the short TTI is configured, the HARQ-ACK response is based on a second DL association set table, the second DL association set specifying downlink slot(s) associated with each slot 0 to slot 19.

4. The eNB of claim 3 , wherein
the first DL association set specifying that no downlink subframe is associated with one or more subframes among the subframe 0 to the subframe 9, and
the second DL association set specifying that no downlink slot is associated with one or more slots among the slot 0 to the slot 19.

Assignees

• Sharp Laboratories America Inc
• Sharp Kk

Inventors

• Yin Zhanping
• Nogami Toshizo

Classifications

• H04L5/14

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

• H04L1/1812

  Hybrid protocols; Hybrid automatic repeat request [HARQ] · CPC title

• H04L1/1854 Primary

  Scheduling and prioritising arrangements · CPC title

• H04W72/0446 Primary

  Resources in time domain, e.g. slots or frames · CPC title

• H04W72/1263

  Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows · CPC title