Short transmission time interval (TTI)

Patent metadata

Field	Value
Publication number	US-11419110-B2
Application number	US-201615767993-A
Country	US
Kind code	B2
Filing date	Apr 1, 2016
Priority date	Nov 3, 2015
Publication date	Aug 16, 2022
Grant date	Aug 16, 2022

Abstract

Technology for a user equipment (UE) to perform reduced transmission time interval (TTI) data transmission within a wireless communication network is disclosed. The UE can process a process, for transmission to an eNodeB, control information within a short transmission time interval (TTI) over a short resource block (RB) set within a short physical uplink control channel (S-PUCCH), wherein the short TTI is shorter in time than a TTI that has a duration of at least one (1) millisecond, and wherein the S-PUCCH is a subset of resources available for a short physical uplink shared channel (S-PUSCH) and the S-PUSCH is a subset of resources available for a legacy PUSCH transmission; and process, for transmission to the eNodeB, data within the short TTI over the short TTI RB set within the S-PUSCH.

First claim

What is claimed is:

1. An apparatus of a user equipment (UE), the UE configured to perform short transmission time interval (TTI) data transmission, the apparatus comprising
one or more processors and memory configured to:
blindly detect a short transmission time interval (TTI) resource block (RB) set allocated for a short TTI;
process, for transmission to a base station, control information within the short TTI over the short TTI RB set within a short physical uplink control channel (S-PUCCH), wherein the short TTI is shorter in time than a legacy TTI that has a duration of at least one (1) millisecond, and wherein the S-PUCCH is a subset of resources available for a short physical uplink shared channel (S-PUSCH) and the S-PUSCH is a subset of resources available for a PUSCH transmission, and resources for the short TTI are allocated dynamically using a downlink control information (DCI) format on a physical downlink control channel (PDCCH);
process, for transmission to the base station, data within the short TTI over the short TTI RB set within the S-PUSCH, the data communicated over the short TTI RB set allocated for the short TTI that is equal to or less than one (1) millisecond (ms) being in a same frequency of alternative data being transmitted using the legacy TTI, wherein frequency regions of the TTI and the short TTI are interleaved for a downlink while the legacy TTI and the short TTI are designated as a continuous frequency region for an uplink;
generate a bundled short TTI by bundling the short TTI with one or more additional short TTI;
use a defined DCI format in the short TTI control region to determine a number of the bundled short TTI; and
accommodate base station scheduling for the bundled short TTI.

2. The apparatus of claim 1 , wherein the one or more processors and memory are further configured to process, for downlink transmission from a base station, the data communicated on the short TTI RB set allocated for the short TTI that is equal to or less than one (1) millisecond (ms) being in a same frequency of alternative data being transmitted using the legacy TTI.

3. The apparatus of claim 1 , wherein the short TTI is defined as 0.1 milliseconds (ms).

4. The apparatus of claim 1 , wherein the short TTI is defined as equal to one or more orthogonal frequency multiple access (OFDMA) symbols.

5. The apparatus of claim 1 , wherein the one or more processors and memory are further configured to detect control regions and data regions in the short TTI RB set allocated for the short TTI.

6. The apparatus of claim 1 , wherein the one or more processors and memory are further configured to monitor a control region in the short TTI RB set allocated for the short TTI.

7. The apparatus of claim 1 , wherein the one or more processors and memory are further configured to multiplex data transmissions using the legacy TTI and data transmissions using the short TTI.

8. The apparatus of claim 1 , wherein the one or more processors and memory are further configured to use the short TTI or the legacy TTI for a selected subframe.

9. The apparatus of claim 1 , wherein the short TTI RB set allocated for the short TTI is signaled from the base station by upper layer signaling.

10. The apparatus of claim 1 , wherein the apparatus includes at least one of an antenna, a touch sensitive display screen, a speaker, a microphone, a graphics processor, an application processor, a baseband processor, an internal memory, a non-volatile memory port, and combinations thereof.

11. The apparatus of claim 1 , wherein the control information and the data are processed for transmission using a baseband processor.

12. An apparatus of base station, the base station configured to perform short transmission time interval (TTI) data transmission with a User Equipment (UE), the apparatus comprising one or more processors and memory configured to:
process, for transmission to a UE, control information within a short transmission time interval (TTI) over a short TTI resource block (RB) set within a short physical downlink control channel (S-PDCCH), wherein the short TTI is shorter in time than a legacy TTI that has a duration of at least one (1) millisecond, and wherein the S-PDCCH is a subset of resources available for a short physical downlink shared channel (S-PDSCH) and the SPDSCH is a subset of resources available for a PDSCH transmission, and resources for the short TTI are allocated dynamically using a downlink control information (DCI) format on a PDCCH, wherein the short TTI RB set allocated for the short TTI is signaled using the legacy physical downlink control channel (PDCCH) masked with a specific radio network temporary identifier (RNTI);
process, for transmission to the UE, data within the short TTI over the short TTI RB set within the S-PDSCH, the data communicated over the short TTI RB set allocated for the short TTI that is equal to or less than one (1) millisecond (ms) being in a same frequency of alternative data being transmitted using the legacy TTI, wherein frequency regions of the TTI and the short TTI are interleaved for a downlink while the legacy TTI and the short TTI are designated as a continuous frequency region for an uplink;
generate a bundled short TTI by bundling the short TTI with one or more additional short TTI; and
use a defined DCI format in the short TTI control region to determine a number of the bundled short TTI.

13. The apparatus of claim 12 , wherein the short TTI is less than 1 millisecond (ms) or equal to or less than 0.5 ms.

14. The apparatus of claim 12 , wherein the short TTI is defined as equal to one or more orthogonal frequency multiple access (OFDMA) symbols.

15. The apparatus of claim 12 , wherein the one or more processors and memory are further configured to multiplex data of the legacy TTI and data of the short TTI using frequency division multiplexing (FDM).

16. The apparatus of claim 12 , wherein the one or more processors and memory are further configured to:
use the short TTI in a selected subframe for transmitting data to or receiving data from the UE;
use the legacy TTI and the short TTI for transmitting data to or receiving data from the UE in a selected subframe;
transmit data in the short TTI using only one transport block (TB);
schedule a contiguous set of the short TTI RB set in a frequency domain for transmitting data in the short TTI; or
schedule data, for transmission to the UE, according to the short TTI over the another short TTI RB set within the PUCCH, wherein the other short TTI RB set is the subset of resources available for PUSCH transmissions.

17. The apparatus of claim 12 , wherein the one or more processors and memory are further configured to determine the short TTI RB set in order to monitor a short TTI control region, wherein the short TTI RB set is scheduled according to static scheduling, wherein the short TTI RB set is located in a same one or more resource elements (REs) in each subframe, or the short TTI RB set is scheduled according to dynamic scheduling, wherein the short TTI RB set is located in different one or more resource elements (REs) in every subframe.

18. The apparatus of claim 12 , wherein the one or more processors and memory are further configured to generate a bundled short TTI by bundling a plurality of short TTIs, wherein the plurality of short TTIs include a fixed number of the short TTI, wherein the fixed number of short TTI includes one or more symbols in a downlink bundle and one or more symbols in an uplink bundle.

19. The apparatus of claim 12 , whe

Assignees

• Apple Inc

Inventors

• Ibars Casas Christian
• Han Seunghee
• He Hong
• Davydov Alexei

Classifications

• H04W72/23

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

• H04W72/21

  in the uplink direction of a wireless link, i.e. towards the network · CPC title

• H04L5/0053 Primary

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

• H04W72/0446 Primary

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

• H04W72/042

  Electricity · mapped topic