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Method and device for terminal to transmit/receive signal in wireless communication system applying carrier aggregation technology

A wireless communication system, carrier aggregation technology, applied in wireless communication, multiplexing communication, orthogonal multiplexing system, etc., can solve problems such as increased service availability

Inactive Publication Date: 2016-05-11
LG ELECTRONICS INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, reduction of cost per bit, increase of service availability, flexible use of frequency band, simple structure, open interface, and suitable power consumption by UE are required

Method used

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  • Method and device for terminal to transmit/receive signal in wireless communication system applying carrier aggregation technology
  • Method and device for terminal to transmit/receive signal in wireless communication system applying carrier aggregation technology
  • Method and device for terminal to transmit/receive signal in wireless communication system applying carrier aggregation technology

Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0095] First, in the case where a predetermined preamble between the eNB and the UE is located at the front end of each subframe, the UE may receive the preamble to determine whether the corresponding subframe is set in the uplink or the downlink.

[0096] For example, the preamble is located at the same resource in all subframes and includes information having a minimum size of 1 bit to indicate the direction (for example, uplink or downlink) for which the corresponding subframe is set. The eNB and the UE perform downlink communication or uplink communication according to the structure of the subframe determined by the preamble.

[0097] In addition, the enabling of the unlicensed frequency band may be decided based on the carrier sensing (CS) operation. The preamble described above can indicate that the unlicensed frequency band is in an idle state. In addition, the preamble may be transmitted only in a state in which an unauthorized frequency band is in an idle state.

[0098] ...

no. 2 example

[0110] In the case of using an unlicensed frequency band based on the carrier sensing operation in the wireless communication system to which the carrier aggregation technology is applied, the eNB may notify the UE of the uplink subframe (or uplink subframe) through higher layer signaling in advance. And downlink subframes). For example, the eNB may notify the UE of information about the configuration of uplink / downlink subframes valid during a section T (sectionT) having a constant length through higher layer signaling.

[0111] Hereinafter, for the convenience of description, the information about the configuration of the uplink / downlink subframe valid during the portion T having a constant length will be referred to as a message X.

[0112] In addition, the predetermined value between the eNB and the UE may be used as the T value, or the eNB may notify the UE of the T value through additional higher layer signaling, that is, message Y together with message X. The message X and ...

no. 3 example

[0127] Meanwhile, in the case where the eNB notifies the UE of the message X valid during the predetermined time period T through higher layer signaling, the eNB may specify a part of a specific subframe selected from among several subframes constituting the message X to perform carrier Sensing operation. A part of the specific subframe may be the second time slot area of ​​the last one of several subframes corresponding to the predetermined time period T. The eNB and UE do not use the corresponding zone in downlink communication and uplink communication. At this time, the PDSCH / PUCSH transmitted from the corresponding subframe in consideration of the reduced number of symbols may be rate matched or punctured.

[0128] In addition, the eNB (or UE) may be based on the assumption that the uplink / downlink configuration in the part T is repeatedly applied from the first subframe of the radio frame #0 only when it is designated to perform the carrier sensing operation. The carrier s...

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Abstract

Disclosed in the present invention is a method for a terminal to transmit / receive signals to / from a base station in a wireless communication system to which the carrier aggregation technology is applied. More particularly, the present invention includes the steps of: receiving a preamble from a base station through a specific component carrier; determining the use of uplink or downlink of a corresponding subframe based on the preamble; Transmission of uplink signals from a component carrier to a base station, or reception of downlink signals from a base station through a specific component carrier.

Description

Technical field [0001] The present invention relates to a wireless communication system, and more particularly, to a method for user equipment to transmit and receive signals in a wireless communication system to which carrier aggregation technology is applied, and a device used in the method. Background technique [0002] A brief description will be given of a third partnership project long-term evolution (3GPPLTE) (hereinafter, referred to as “LTE”) communication system as an example of a wireless communication system to which the present invention is applicable. [0003] figure 1 It is a diagram schematically showing a network structure of an evolved universal mobile telecommunications system (E-UMTS) as an example of a wireless communication system. The E-UMTS system has evolved from the conventional UMTS system and its basic standardization is currently underway in 3GPP. E-UMTS may generally be referred to as a long-term evolution (LTE) system. For the details of the technic...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04J11/00H04B7/26
CPCH04L5/001H04L5/0048H04L5/0055H04L5/0064H04L5/0096H04L5/1469H04L5/0053H04W72/0446H04W72/20
Inventor 李承旻金学成徐翰瞥
Owner LG ELECTRONICS INC