# US 10,484,962 B2 · Method and apparatus for receiving system information and paging in mobile communication system

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- Number: US 10,484,962 B2
- Document ID: US10484962B2
- Status: Granted
- Kind: B2
- Application number: 14/909,654
- Filed: 2014-07-24
- Published: 2016-06-30
- Granted: 2019-11-19
- Earliest claimed: 2013-08-02
- Assignees: Samsung Electronics Co., Ltd.
- Applicants: Samsung Electronics Co., Ltd.
- Inventors: Sangbum Kim; Soenghun Kim; Jaehyuk Jang; Kyeongin Jeong
- Web page: https://patentgrep.com/patent/US10484962B2

## CPC

- H04W 68/02: Arrangements for increasing efficiency of notification or paging channel
- H04W 48/12: using downlink control channel
- H04W 52/0206: {in access points, e.g. base stations}
- H04W 52/0216: {using a pre-established activity schedule, e.g. traffic indication frame}
- H04W 52/0245: {according to signal strength}
- H04W 76/28: Discontinuous transmission [DTX]; Discontinuous reception [DRX]
- Y02D 30/70: in wireless communication networks
- H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72)
- Y02D: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE

## Abstract

A method for transmitting/receiving a signal by a base station of a mobile communication system according to an embodiment of the present specification comprises the steps of: receiving, from a terminal, measurement information on neighboring base stations to the terminal; determining a higher signal transmission mode on the basis of the received measurement information; transmitting a request message to a small cell base station which has been determined on the basis of the determined mode and the measurement information; and receiving, from the small cell base station, an identifier for downlink reception and/or a cell identifier of the small cell, the identifiers being transmitted by the small cell. Embodiments of the present specification may provide an apparatus by which a terminal having high mobility can easily receive a signal from a base station and a method of controlling the same.

## Claims

### Claim 1

A method of a terminal in a communication system, the method comprising:
receiving information for an extended discontinuous reception (DRX) cycle for the terminal;
identifying whether a length of an extended DRX cycle configured for the terminal is longer than a modification period, based on the information for the extended DRX cycle;
receiving, from a base station, system information;
verifying whether system information stored in the terminal is valid based on the received system information from the base station, based on that the length of the extended DRX cycle configured for the terminal is longer than the modification period; and
monitoring a plurality of paging messages during a time period configured for the terminal, based on that the length of the extended DRX cycle configured for the terminal is longer than the modification period.

### Claim 2

A method of a base station in a communication system, the method comprising:
transmitting, to a terminal, information for an extended discontinuous reception (DRX) cycle for the terminal;
transmitting, to the terminal, system information; and
transmitting, to the terminal, a plurality of paging messages,
wherein, whether a length of an extended DRX cycle configured for the terminal is longer than a modification period is identified, by the terminal, based on the information for the extended DRX cycle, a validation of system information stored in the terminal is verified based on the system information transmitted to the terminal, based on that the length of the extended DRX cycle is longer than the modification period, a plurality of paging messages are monitored during a time period configured for the terminal, based on that the length of the extended DRX cycle configured for the terminal is longer than the modification period.

### Claim 3

A terminal in a communication system, the terminal comprising:
a transceiver; and
a controller coupled with the transceiver and configured to:
receive information for an extended discontinuous reception (DRX) cycle for the terminal,
identify whether a length of an extended DRX cycle configured for the terminal is longer than a modification period, based on the information for the extended DRX,
control the transceiver to receive, from a base station, system information,
verify whether system information stored in the terminal is valid based on the received system information from the base station, based on that the length of the extended DRX cycle configured for the terminal is longer than the modification period, and
monitor a plurality of paging messages, during a time period configured for the terminal, in case that the length of the extended DRX cycle configured for the terminal is longer than the modification period.

### Claim 4

A base station in a communication system, the base station comprising:
a transceiver; and
a controller coupled to the transceiver and configured to:
control the transceiver to transmit to a terminal, information for an extended discontinuous reception (DRX) cycle for the terminal,
control the transceiver to transmit system information, and
transmit, to the terminal, a plurality of paging messages,
wherein, whether a length of an extended DRX cycle configured for the terminal is longer than a modification period is identified, by the terminal, based on the information for the extended DRX cycle, a validation of system information stored in the terminal is verified based on the system information transmitted to the terminal, based on that the length of the extended DRX cycle is longer than the modification period, a plurality of paging messages are monitored during a time period configured for the terminal, in case that the length of the extended DRX cycle configured for the terminal is longer than the modification period.