Unlock instant, AI-driven research and patent intelligence for your innovation.

Feedback method of ACK/NACK under carrier aggregation, user equipment and system thereof

A technology for confirming information and carrier aggregation, applied in wireless communication, using return channels for error prevention/detection, electrical components, etc., can solve problems such as HSDPA system performance degradation

Inactive Publication Date: 2012-10-17
ZTE CORP
View PDF4 Cites 9 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] In view of this, the main purpose of the present invention is to provide a feedback method, user equipment and system for acknowledgment information under carrier aggregation, so as to solve the problem when the LTE system and the HSDPA system perform carrier aggregation, and the ACK / NACK feedback is concentrated on the carrier of the LTE system. , due to the difference in the timing relationship between the feedback ACK / NACK of the LTE system and the HSDPA system, the problem of HSDPA system performance degradation

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
  • Feedback method of ACK/NACK under carrier aggregation, user equipment and system thereof
  • Feedback method of ACK/NACK under carrier aggregation, user equipment and system thereof
  • Feedback method of ACK/NACK under carrier aggregation, user equipment and system thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0061] In this embodiment, it is assumed that the base station only allocates resources of one time slot to the UE, that is, the second time slot in each subframe, and does not allocate resources of the first time slot to the UE, and the UE feeds back ACK / NACK. Then, the feedback process for confirming information includes:

[0062] The UE judges whether the carrier aggregation is performed between the LTE system and the HSDPA system, and whether the time origins of the wireless frames of the LTE system and the radio frames of the HSDPA system are completely aligned, and whether it is necessary to transmit an ACK / NACK feedback;

[0063] When the above three judgment results are all yes, according to the fact that the base station only allocates the resources of the second time slot for the UE, and the UE feeds back ACK / NACK through the PUCCH, at this time, the UE feeds back the ACK / NACK through the resources of the second time slot. NACK specifically includes: the first tw...

Embodiment 2

[0067] In this embodiment, it is assumed that the base station allocates resources of two time slots to the UE, that is, the first time slot and the second time slot of each subframe, and the UE feeds back ACK / NACK through the PUCCH. Then, the feedback process for confirming information includes:

[0068] The UE judges whether the carrier aggregation is performed between the LTE system and the HSDPA system, and whether the time origins of the wireless frames of the LTE system and the radio frames of the HSDPA system are completely aligned, and whether it is necessary to transmit an ACK / NACK feedback;

[0069] When the results of the above three judgments are all yes, the base station has allocated resources of two time slots to the UE, and the UE feeds back ACK / NACK through the PUCCH. Feedback ACK / NACK in two time slots, including: the last two symbols of the first time slot are used to transmit ACK / NACK, and the remaining symbols are used to transmit demodulation reference ...

Embodiment 3

[0073] In this embodiment, it is assumed that the base station allocates resources of two time slots to the UE, that is, the first time slot and the second time slot of each subframe, and the UE feeds back ACK / NACK through the PUCCH. Then, the feedback process for confirming information includes:

[0074] The UE judges whether the carrier aggregation is performed between the LTE system and the HSDPA system, and whether the time origins of the wireless frames of the LTE system and the radio frames of the HSDPA system are completely aligned, and whether it is necessary to transmit an ACK / NACK feedback;

[0075] When the results of the above three judgments are all yes, the base station has allocated resources of two time slots to the UE, and the UE feeds back ACK / NACK through the PUCCH. Feedback ACK / NACK in two time slots, including: the last two symbols of the first time slot are used to transmit ACK / NACK, and the remaining symbols are used to transmit demodulation reference ...

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 invention discloses a feedback method of ACK / NACK under carrier aggregation, user equipment and a system thereof. The carrier aggregation is carried out in a long term evolution (LTE) system and a high speed downlink packet access (HSDPA) system. A time starting point of a radio frame of the LTE system and the time starting point of the radio frame of the HSDPA system are completely aligned. When the ACK / NACK is needed to be fed back aiming at a high speed-physical downlink shared channel (HS-PDSCH) at a present moment and the ACK / NACK which is fed back needs to be emitted through a carrier wave of the LTE system, a base station distributes resources of a first time slot and a second time slot for UE so that the UE on the LTE carrier wave emits the ACK / NACK through the first time slot and the second time slot or the second time slot. When the LTE system and the HSDPA system carry out the carrier aggregation and the feedback concentrates on the LTE system carrier wave, because a timing relationship of the ACK / NACK fed back by the LTE system and the timing relationship of the ACK / NACK fed back by the HSDPA system are different, HSDPA system performance is reduced. By using the method, the equipment and the system of the invention, the above problem can be solved.

Description

technical field [0001] The present invention relates to a mobile communication system, in particular to a method for feeding back acknowledgment information (ACK / NACK) under carrier aggregation, user equipment and a system. Background technique [0002] According to the proposal RP-110384 (load balancing and carrier aggregation among wireless access technologies, Inter-RAT load balancing_carrier aggregation), long-term evolution (LTE, Long Term Evolution) system and high-speed packet access system (HSPA, High Speed ​​Packet Access) may perform carrier aggregation in the future, that is, a multi-mode base station can simultaneously transmit to a multi-mode UE LTE signals and HSPA signals, a multi-mode base station can receive LTE signals and HSPA signals from a multi-mode UE at the same time, and the transmission and reception can be performed simultaneously. [0003] According to Section 7.3 of 3GPP TS 36.213V10.0.0, when the base station schedules the UE's Physical Downlin...

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
IPC IPC(8): H04L1/16H04W72/04
Inventor 彭佛才韩翠红张峻峰江溯张睿覃怡春任震
Owner ZTE CORP
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

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

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com