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new patent Method of controlling transmit power of ue in wireless communication system and apparatus for the same / Lg Electronics Inc.




Method of controlling transmit power of ue in wireless communication system and apparatus for the same


Disclosed herein is a method of transmitting a signal at a user equipment (UE) in a wireless communication system. The method includes receiving a radio resource control (RRC) configuration message from a network; determining a preference value relating to power saving after receiving the RRC configuration message; and transmitting the determined preference value relating to the power saving to the network.



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USPTO Applicaton #: #20170078966
Inventors: Sungduck Chun, Sunghoon Jung, Seungjune Yi, Youngdae Lee, Sungjun Park


The Patent Description & Claims data below is from USPTO Patent Application 20170078966, Method of controlling transmit power of ue in wireless communication system and apparatus for the same.


TECHNICAL FIELD

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The present invention relates to a wireless communication system, and more particularly, to a method of controlling transmit power of a user equipment (UE) in a wireless communication system and an apparatus for the same.

BACKGROUND

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ART

As an example of a wireless communication system to which the present invention is applicable, a 3rd Generation Partnership Project (3GPP) Long Term Evolution (LTE) communication system will be schematically described.

FIG. 1 is a diagram showing a network structure of an Evolved Universal Mobile Telecommunications System (E-UMTS) as a mobile communication system. The E-UMTS is an evolved form of the UMTS and has been standardized in the 3GPP. Generally, the E-UMTS may be called a Long Term Evolution (LTE) system. For details of the technical specifications of the UMTS and E-UMTS, refer to Release 7 and Release 8 of “3rd Generation Partnership Project; Technical Specification Group Radio Access Network”.

Referring to FIG. 1, the E-UMTS mainly includes a User Equipment (UE), base stations (or eNBs or eNode Bs), and an Access Gateway (AG) which is located at an end of a network (E-UTRAN) and which is connected to an external network. Generally, an eNB can simultaneously transmit multiple data streams for a broadcast service, a multicast service and/or a unicast service.

One or more cells may exist per eNB. The cell is set to use a bandwidth such as 1.25, 2.5, 5, 10, 15 or 20 MHz to provide a downlink or uplink transmission service to several UEs. Different cells may be set to provide different bandwidths. The eNB controls data transmission or reception of a plurality of UEs. The eNB transmits downlink (DL) scheduling information of DL data so as to inform a corresponding UE of time/frequency domain in which data is transmitted, coding, data size, and Hybrid Automatic Repeat and reQest (HARQ)-related information. In addition, the eNB transmits uplink (UL) scheduling information of UL data to a corresponding UE so as to inform the UE of a time/frequency domain which may be used by the UE, coding, data size and HARQ-related information. An interface for transmitting user traffic or control traffic can be used between eNBs. A Core Network (CN) may include the AG and a network node or the like for user registration of the UE. The AG manages mobility of a UE on a Tracking Area (TA) basis. One TA includes a plurality of cells.

Although wireless communication technology has been developed up to Long Term Evolution (LTE) based on Wideband Code Division Multiple Access (WCDMA), the demands and the expectations of users and providers continue to increase. In addition, since other radio access technologies have been continuously developed, new technology evolution is required to secure high competitiveness in the future. Decrease in cost per bit, increase in service availability, flexible use of a frequency band, simple structure, open interface, suitable User Equipment (UE) power consumption and the like are required.

DISCLOSURE OF INVENTION Technical Problem

An object of the present invention devised to solve the problem lies on a method of controlling transmit power of a user equipment (UE) in a wireless communication system and an apparatus for the same.

Solution to Problem

The object of the present invention can be achieved by providing a method of transmitting a signal at a user equipment (UE) in a wireless communication system, including receiving a radio resource control (RRC) configuration message from a network; determining a preference value relating to power saving after receiving the RRC configuration message; and transmitting the determined preference value relating to the power saving to the network.

Preferably, the RRC configuration message is a RRC configuration enquiry message or a RRC reconfiguration message. Here, the RRC reconfiguration message comprising a first field that enables the UE to transmit the determined preference value relating to the power saving to the network.

More preferably, the determined preference value relating to the power saving is transmitted using a RRC reconfiguration complete message or a RRC configuration response message.

More specifically, the determined preference value relating to the power saving is included in a second field of a response message of the RRC reconfiguration message. Here, the second field may be a reason field.

Further, the UE is in a RRC connected mode.

Further, the method further comprises starting a timer upon transmitting the determined preference value relating to the power saving to the network.

Furthermore, the preference value relating to the power saving is based on an application which is being driven in the UE. More specifically, the preference value relating to the power saving is based on latency required by an application which is being driven in the UE.

As other aspect of the present invention, a method of receiving a signal at a network in a wireless communication system is disclosed. The method comprises transmitting a radio resource control (RRC) configuration message to a user equipment (UE); and receiving a preference value relating to power saving from the UE, wherein the preference value relating to the power saving is received after transmitting the RRC configuration message.

Preferably, the RRC configuration message is a RRC configuration enquiry message or a RRC reconfiguration message. Here, the RRC reconfiguration message comprising a first field that enables the UE to transmit the determined preference value relating to power saving to the network.

More preferably, the preference value relating to the power saving is received using a RRC reconfiguration complete message or a RRC configuration response message. Or, the preference value relating to the power saving is included in a second field of a response message of the RRC reconfiguration message. Here, the second field is a reason field.

More specifically, the preference value relating to the power saving is received from the UE after starting a timer by the UE. Or, the preference value relating to the power saving is based on an application which is being driven in the UE. Or, the preference value relating to the power saving is based on latency required by an application which is being driven in the UE.

Advantageous Effects of Invention

According to the embodiment of the present invention, it is possible to efficiently control uplink transmit power in various traffic states.

The effects of the present invention are not limited to the above-described effects and other effects which are not described herein will become apparent to those skilled in the art from the following description.

BRIEF DESCRIPTION OF DRAWINGS

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The accompanying drawings, which are included to provide a further understanding of the invention, illustrate embodiments of the invention and together with the description serve to explain the principle of the invention.

In the drawings:

FIG. 1 is a diagram showing a network structure of an Evolved Universal Mobile Telecommunications System (E-UMTS) as an example of a wireless communication system;

FIG. 2 is a diagram showing the concept of a network structure of an Evolved Universal Terrestrial Radio Access Network (E-UTRAN);

FIG. 3 is a diagram showing a control plane and a user plane of a radio interface protocol architecture between a User Equipment (UE) and an Evolved Universal Terrestrial Radio Access Network (E-UTRAN) based on a 3rd Generation Partnership Project (3GPP) radio access network standard;

FIG. 4 is a diagram showing physical channels used in a 3GPP system and a general signal transmission method using the same;

FIG. 5 is a diagram showing the structure of a radio frame used in a Long Term Evolution (LTE) system;

FIG. 6 is a diagram illustrating a general transmission and reception method using a paging message;




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stats Patent Info
Application #
US 20170078966 A1
Publish Date
03/16/2017
Document #
15341647
File Date
11/02/2016
USPTO Class
Other USPTO Classes
International Class
/
Drawings
10


Communication System Radio Resource Control Wireless

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Lg Electronics Inc.


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20170316|20170078966|controlling transmit power of ue in wireless communication system and the same|Disclosed herein is a method of transmitting a signal at a user equipment (UE) in a wireless communication system. The method includes receiving a radio resource control (RRC) configuration message from a network; determining a preference value relating to power saving after receiving the RRC configuration message; and transmitting the |Lg-Electronics-Inc
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