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Apparatus and method for transmitting ul feedback information for carrier over an UL feedback channel in a multicarrier system

一种多载波系统、反馈信道的技术，应用在多载波系统领域，能够解决载波激活失败、小覆盖范围等问题，达到防止激活失败的效果

Inactive Publication Date: 2012-11-07
LG ELECTRONICS INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0028] In addition, when the secondary carriers assigned by the base station have different coverages at the time of network (re)entry of the terminal, if the base station, which is not aware of the channel state of the inactive carrier, indicates that a certain inactive carrier is to be activated, then The corresponding carrier has a smaller coverage than the coverage of an existing activated carrier, and the activation of the carrier may fail if the terminal is not located within the coverage

Method used

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  • Apparatus and method for transmitting ul feedback information for carrier over an UL feedback channel in a multicarrier system
  • Apparatus and method for transmitting ul feedback information for carrier over an UL feedback channel in a multicarrier system
  • Apparatus and method for transmitting ul feedback information for carrier over an UL feedback channel in a multicarrier system

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Experimental program
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no. 1 approach

[0146] According to a first embodiment, there is provided a method of implicitly notifying a terminal of a carrier to which a feedback channel for data transmitted and / or received through a downlink (DL) carrier is assigned in a multi-carrier system.

[0147] As defined in single carrier, in a multi-carrier system the feedback channel for the DL carrier will be assigned through the Feedback Allocation A-MAP IE.

[0148] Here, the feedback channel refers to a fast feedback channel of a subcarrier or a HARQ feedback channel of HARQ ACK / NACK for data transmitted and / or received in downlink.

[0149] When the DL carrier is an active carrier regardless of whether the uplink carrier to which the feedback channel for the DL carrier is assigned (hereinafter referred to as "corresponding carrier") is an active carrier or an inactive carrier, the base station transmits to the corresponding carrier The transmitted downlink mapping (DL A-MAP) message transmits the feedback allocation A-MA...

no. 2 approach

[0187] According to the second embodiment, there is provided a method of explicitly notifying a carrier to which a feedback channel of a downlink subcarrier is allocated using a carrier indicator bit of the feedback allocation A-MAP IE in a multi-carrier system.

[0188] In other words, the base station transmits to the terminal the indication field indicating the carrier to which the feedback channel of the corresponding subcarrier is assigned by including the carrier indication field in the feedback allocation A-MAP IE. Here, the corresponding subcarrier refers to the subcarrier used to receive the feedback allocation A-MAP IE.

[0189]Therefore, the terminal transmits downlink feedback information about the corresponding subcarrier to the base station through the UL feedback channel of the carrier indicated by the carrier indication field. Here, the UL feedback channel is allocated by the Feedback Allocation A-MAP IE.

[0190] Table 1 below illustrates an example of a feed...

no. 3 approach

[0203] According to the third embodiment, there is provided a method of explicitly notifying a carrier to which a feedback channel of a DL subcarrier is assigned by including a feedback carrier index in an AAI_CM-CMD message to be transmitted to a terminal.

[0204] The base station transmits a MAC control message such as a carrier management command (AAI_CM-CMD) message to a terminal in multi-carrier (MC) mode, thus indicating activation or deactivation of a secondary carrier.

[0205] Here, the base station may instruct to activate both the downlink and uplink of the subcarrier or only activate its downlink, and in addition, the base station may instruct to deactivate both the downlink and uplink of the subcarrier or only deactivate Its uplink and keeps its downlink active.

[0206] In this case, the terminal may have a secondary carrier, which is a DL unpaired carrier, through the received CM-CMD message. In other words, the terminal may have only the secondary carrier wit...

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Abstract

Disclosed herein is a method for transmitting feedback information on the downlink of a carrier to a base station in a multicarrier system, and the method may include receiving a first message including uplink feedback allocation information from the base station through a secondary carrier, and transmitting uplink feedback information on the secondary carrier to the base station over an assigned uplink feedback channel of a primary carrier when the secondary carrier is a downlink only activated carrier.

Description

technical field [0001] The present disclosure relates to a multi-carrier system, and more particularly, to a method and device for transmitting downlink feedback information for a subcarrier through an uplink feedback channel. Background technique [0002] Hereinafter, the carrier will be briefly described. [0003] It may be necessary to transmit information to the user about which modulation manipulations are performed on the amplitude, frequency and / or phase of the sine wave or periodic pulse wave. At this time, the sine wave or pulse wave performing the role of carrying information may be called a carrier wave. [0004] A scheme of modulating a carrier may include a single carrier modulation (SCM) scheme and a multicarrier modulation (MCM) scheme. Among them, the single-carrier modulation scheme is a scheme in which all information is loaded on a carrier to modulate them. [0005] The multi-carrier modulation scheme refers to a technique in which an entire bandwidth c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04J11/00H04B7/26H04W72/04
CPCH04L5/001H04L5/0094H04L5/0098H04W72/0413H04L5/0055H04L5/0053H04L1/1861H04W72/20H04L1/1812
Inventor 李银终陆昤洙柳麒善千珍英
Owner LG ELECTRONICS INC