Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Uplink control information transmitting method and apparatus

a transmission method and information technology, applied in the field of mobile communication, can solve the problems of unlicensed spectrum, unsatisfactory lte quality of service, and acute conflicting high-speed wireless service requirements of user equipments (ue), and achieve the effects of improving lte network efficiency, reducing the impact of downlink signal scheduling, and improving transmission efficiency

Inactive Publication Date: 2018-01-25
SAMSUNG ELECTRONICS CO LTD
View PDF5 Cites 35 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention provides methods and apparatuses for transmitting uplink control information (UCI) in a wireless network, particularly in an unlicensed spectrum. The technical solution allows for flexible transmission of UCI through a pre-defined location and format in either a licensed or idle unlicensed spectrum, based on a ULT grant from a base station. This improves transmission efficiency and reduces impact on downlink signal scheduling, thus further improving LTE network efficiency.

Problems solved by technology

Sharply-increased high speed broadband wireless service requirements of User Equipments (UE) and scarce spectrum resources are acutely conflicting.
Thus, interference in the unlicensed spectrums is uncertain, which will cause that Quality of Service (QoS) for LTE is hardly guaranteed.
However, the unlicensed spectrums can be used for data transmission with low QoS requirements.
It is a key problem how to avoid interference between LTE-U system and another wireless system (e.g., radars or WiFi) on unlicensed spectrums.
For example, the device can transmit signals at most in 2.5 ms per 50 ms, which is not nearly enough for the UCI.
Further, if the maximum occupancy time is short, e.g., 4 ms specified in Japan, the ACK / NACK in LTE system cannot be fed back in the maximum occupancy time.
In a first condition, since the base station may not occupy the channel in the unlicensed spectrum over a long period of time, the UE cannot obtain a CSI measurement result, and cannot report the aperiodic CSI accordingly.
However, since the channel is busy in the subframe where the CSI is reported, the UE may not transmit the CSI, thereby consuming UE calculation capability.
In practice, a UE processing capability is limited, i.e., the number of CSI processes calculated by the UE is limited.
Further, if the UE has calculated and updated a CSI process with a high priority but there is no valid CSI report resource for the CSI process, the UE calculation efficiency is reduced.
Thus, the set corresponding to the triggered aperiodic CSI report may include valid CSI measurement results and invalid CSI measurement results, thereby reducing aperiodic CSI report efficiency.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Uplink control information transmitting method and apparatus
  • Uplink control information transmitting method and apparatus
  • Uplink control information transmitting method and apparatus

Examples

Experimental program
Comparison scheme
Effect test

first embodiment

[0091]Methods in the first embodiment apply to a UE configured to have simultaneous PUCCH and PUSCH transmission. FIG. 3 is a flowchart illustrating an uplink control information transmitting method according to a first embodiment of the present application. As shown in FIG. 3, the method includes procedures as follow.

[0092]At block 301, the UE receives an UL grant from a base station.

[0093]In this block, the UE detects the UL grant transmitted from the base station.

[0094]At block 302a , when the UE determines a carrier with a smallest SCellIndex in the detected UL grant is an unlicensed carrier according to the UL grant, the UE does not detect the UL grant scheduling a PUSCH of a Pcell or a sPcell, and UCI includes ACK / NACK and periodic CSI, or when the UE determines the carrier with the smallest SCellIndex in the detected UL grant is the unlicensed carrier according to the UL grant, the UE does not detect the UL grant scheduling the PUSCH of the Pcell or the sPcell, there is no de...

second embodiment

[0135]Methods in the second embodiment apply to a UE not configured to have simultaneous PUCCH and PUSCH transmission. In particular, four methods are illustrated in this embodiment as follows.

[0136]FIG. 11 is a flowchart illustrating an uplink control information transmitting first method according to a second embodiment of the present application. As shown in FIG. 11, the first method includes procedures as follow.

[0137]At block 1101, the UE receives an UL grant from a base station.

[0138]In this block, the UE detects the UL grant transmitted from the base station.

[0139]At block 1102, if the UE determines a carrier with a smallest SCellIndex in the detected UL grant is an unlicensed carrier according to the UL grant, the UE does not detect the UL grant scheduling a PUSCH of a Pcell or a sPcell, and UCI only includes ACK / NACK, or if the UE determines the carrier with the smallest SCellIndex in the detected UL grant is the unlicensed carrier according to the UL grant, the UE does not...

third embodiment

[0240]In this embodiment, when the UCI includes periodic CSI (a subframe where the UCI is transmitted is a subframe where the periodic CSI is reported), the UCI further includes aperiodic CSI in the same subframe and an uplink carrier carrying the aperiodic CSI is a carrier in the unlicensed spectrum, the periodic CSI is transmitted on a carrier in the licensed spectrum, or the periodic CSI is transmitted according to a method when the UCI is only includes the periodic CSI according to another embodiment of the present invention, or the periodic CSI and the ACK / NACK is transmitted according to a method when the UCI is only includes the periodic CSI according to another example of the present invention. The UE transmits the aperiodic CSI in the unlicensed spectrum when the unlicensed spectrum is idle, or only transmits the periodic CSI on the uplink carrier in the licensed spectrum when the uplink carrier carrying the aperiodic CSI in the unlicensed spectrum is not used for transmiss...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The present invention provides an uplink control information transmitting method and apparatus. In the method, when a user equipment (UE) is configured with an uplink carrier in an unlicensed spectrum, the UE transmits uplink control information through a pre-defined location and a pre-defined format in a licensed spectrum and / or a pre-defined location and a pre-defined format in an idle unlicensed spectrum according to an uplink (UL) grant transmitted from a base station and the UCI to be transmitted. According to the technical solution provided by the present invention, the UCI is flexibly transmitted in the licensed spectrum or in the idle unlicensed spectrum, thereby improving transmission efficiency and reducing impact on downlink signal scheduling when the UE is configured with the uplink carrier in the unlicensed spectrum and transmits the UCI, and further improving LTE network efficiency.

Description

TECHNICAL FIELD[0001]The present invention relates to mobile communication fields, and more particularly, to an uplink control information transmitting method and apparatus.BACKGROUND ART[0002]Sharply-increased high speed broadband wireless service requirements of User Equipments (UE) and scarce spectrum resources are acutely conflicting. Mobile operators start considering unlicensed spectrums as supplement of licensed spectrums. Researches of deploying Long Term Evolution (LTE) on unlicensed spectrums are put on agendas. The researches have been started by 3GPP, that carriers respectively in unlicensed spectrums and licensed spectrums are efficiently aggregated to dramatically improve spectrum utilization in a whole network on the premise that other technologies used for the unlicensed spectrums are not insignificantly affected.[0003]The unlicensed spectrums usually have been used for other purposes, such as radars or WiFi (Wireless Fidelity) of 802.11 series. Thus, interference in...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(United States)
IPC IPC(8): H04W72/04H04L5/00
CPCH04W72/0413H04L5/006H04L5/0055H04L5/0057H04L5/0092H04L5/0082H04L1/00H04L5/0091H04L5/001H04L5/0044H04L27/0006H04L1/1671H04L1/1854H04L1/1861H04L1/1896H04L1/0026H04L1/0031H04L1/0073H04W72/23H04L1/0025H04W72/21
Inventor WANG, YILI, YINGYANG
Owner SAMSUNG ELECTRONICS CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com