Method and apparatus for performing initial access procedure in wireless communication system

Patent metadata

Field	Value
Publication number	US-2016007406-A1
Application number	US-201414763487-A
Country	US
Kind code	A1
Filing date	Jan 24, 2014
Priority date	Jan 25, 2013
Publication date	Jan 7, 2016
Grant date	—

Abstract

A method for and apparatus for performing an initial access procedure in a wireless communication system is provided. A wireless device detects a discontinuous transmission (DTX) cell that operates in a discontinuous transmission (DTX) state by receiving a discovery signal from the DTX cell; transmits an initial request message to the DTX cell to request the DTX cell to transition from the DTX state to a continuous transmission (TX) state.

First claim

1 - 15 . (canceled)

16 . A method for performing a measurement in a wireless communication system, the method comprising:
performing, by a user equipment, a measurement by using a first type signal; receiving, by the user equipment, configuration on a second type signal indicating a periodicity and an offset of the second type signal, wherein the second type signal is a discovery signal; and performing, by the user equipment, a measurement by using the second type signal, wherein the second type signal comprises Primary Synchronization Signal (PSS), Secondary Synchronization Signal (SSS), and Cell-specific Reference Signal (CRS) received during a predefined duration.

17 . The method of claim 16 , wherein the configuration is received via a higher layer signalling.

18 . The method of claim 16 , wherein the predefined duration is set to 6 ms, and the periodicity is set to 40 ms or 80 ms.

19 . The method of claim 16 , wherein the second type signal is received from a cell configured to support on/off operation.

20 . A user equipment (UE) performing a measurement in a mobile communication system, the UE comprising:
a transceiver configured to receive a radio signal; and a processor configured to: perform a measurement by using a first type signal; receive configuration on a second type signal indicating a periodicity and an offset of the second type signal, wherein the second type signal is a discovery signal; and perform a measurement by using the second type signal, wherein the second type signal comprises Primary Synchronization Signal (PSS), Secondary Synchronization Signal (SSS), and Cell-specific Reference Signal (CRS) received during a predefined duration. receive measurement configuration information of a discovery signal received from a secondary cell, wherein the measurement configuration information indicates a frequency of the discovery signal, a periodicity of the discovery signal, and a subframe offset of the discovery signal, wherein the measurement configuration information is received via a radio resource control (RRC) message; and perform a radio resource measurement over Orthogonal Frequency Division Multiplexing (OFDM) symbols carrying the discovery signal.

21 . The UE of claim 20 , wherein the configuration is received via a higher layer signalling.

22 . The UE of claim 20 , wherein the predefined duration is set to 6 ms, and the periodicity is set to 40 ms or 80 ms.

23 . The UE of claim 20 , wherein the second type signal is received from a cell configured to support on/off operation.

Assignees

• Lg Electronics Inc

Inventors

• Yi Yunjung
• Hwang Daesung
• Ahn Joonkui

Classifications

• H04W24/02

  Arrangements for optimising operational condition · CPC title

• H04W52/0206

  in access points, e.g. base stations · CPC title

• H04W48/16

  Discovering, processing access restriction or access information · CPC title

• H04W88/02

  Terminal devices · CPC title

• H04W76/28 Primary

  Discontinuous transmission [DTX]; Discontinuous reception [DRX] · CPC title