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Uplink control signaling over pusch with shortened transmission time interval

A technology for controlling information and time, applied in transmission path sub-channel allocation, transmission path multiple use, signaling allocation, etc., can solve problems affecting radio resource efficiency, etc.

Active Publication Date: 2022-02-08
TELEFON AB LM ERICSSON (PUBL)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Latency reduction may also positively impact radio resource efficiency

Method used

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  • Uplink control signaling over pusch with shortened transmission time interval
  • Uplink control signaling over pusch with shortened transmission time interval
  • Uplink control signaling over pusch with shortened transmission time interval

Examples

Experimental program
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Embodiment Construction

[0074] Several ways to multiplex control information (including eg uplink control information or UCI) onto a shared channel (eg PUSCH) transmitted by SC-FDMA signals with shortened transmission time intervals (TTIs) are discussed next. In particular, different mapping solutions are provided by considering different short TTI lengths and different demodulation reference signal (DMRS) configurations for shared channels. The described solution enables transmission of uplink control signals on shared channels with shortened TTIs to obtain improved latency while taking into account the need for reliable reception of certain control information such as HARQ ACK / NACK data.

[0075] As discussed in the background section above, one way to reduce latency in wireless systems is to reduce the TTI length. However, when the length of TTIs is reduced, eg in uplink transmissions, transmitting DMRS with one or more SC-FDMA symbols for each short TTI results in increased overhead and a corresp...

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PUM

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Abstract

According to an aspect, the transmitting means determines, for each of the plurality of transmissions, whether the user data to be transmitted within the time transmission interval TTT will be closest in time to the DMRS transmitted before or after the user data. All HARQ ACK / NACK data for this transmission is mapped to the earliest in time SC-FDMA symbol in the transmission, carrying user data, if it precedes user data, and to the pre-DFT symbol, which is closest in time to the DMRS before user data is transmitted. If after the user data, all HARQ ACK / NACK data for the transmission is mapped to the last SC-FDMA symbol in the transmission in time, carrying the user data, and to the pre-DFT symbol which is closest in time to the SC-FDMA symbol carrying the user data DMRS sent afterwards. Based on the mapping, an SC-FDMA signal is formed from user data and control information for transmission.

Description

technical field [0001] The present disclosure relates to control signaling in wireless communication networks, and more particularly to control signaling utilizing Single Carrier Frequency Division Multiple Access (SC-FDMA) when using shortened Transmission Time Intervals (TTIs). Background technique [0002] Packet data latency is one of the performance metrics that wireless vendors and wireless system operators regularly measure. End users can also measure packet data delays using, for example, the commonly available "Speed ​​Test" application. Latency measurements are performed when validating new software versions or system components, when deploying the system and during all phases of the radio access network system lifecycle when the system is in commercial operation. [0003] Lower latency than that of previous generations of radio access technologies (RATs) is a performance metric for designs spearheaded by the 3rd Generation Partnership Project (3GPP) for Long Term...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L1/00H04L1/18H04L5/00
CPCH04L1/0079H04L1/0088H04L1/009H04L1/1812H04L1/1861H04L5/0055H04L5/0053H04L5/0051H04L5/0094H04L1/1854H04L1/1887H04L1/1893H04W28/12H04W28/22
Inventor H.萨林李静雅G.维克斯特龙D.拉松L.法尔科内蒂
Owner TELEFON AB LM ERICSSON (PUBL)