WO2010150998A2 - 다중 반송파를 지원하는 무선 통신 시스템에서 시스템 정보 관리 방법 및 장치 - Google Patents
다중 반송파를 지원하는 무선 통신 시스템에서 시스템 정보 관리 방법 및 장치 Download PDFInfo
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- WO2010150998A2 WO2010150998A2 PCT/KR2010/003799 KR2010003799W WO2010150998A2 WO 2010150998 A2 WO2010150998 A2 WO 2010150998A2 KR 2010003799 W KR2010003799 W KR 2010003799W WO 2010150998 A2 WO2010150998 A2 WO 2010150998A2
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W48/00—Access restriction; Network selection; Access point selection
- H04W48/08—Access restriction or access information delivery, e.g. discovery data delivery
- H04W48/12—Access restriction or access information delivery, e.g. discovery data delivery using downlink control channel
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W48/00—Access restriction; Network selection; Access point selection
- H04W48/08—Access restriction or access information delivery, e.g. discovery data delivery
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J11/00—Orthogonal multiplex systems, e.g. using WALSH codes
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/10—Frequency-modulated carrier systems, i.e. using frequency-shift keying
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L43/00—Arrangements for monitoring or testing data switching networks
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
- H04W24/10—Scheduling measurement reports ; Arrangements for measurement reports
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
- H04W88/02—Terminal devices
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/0001—Arrangements for dividing the transmission path
- H04L5/0003—Two-dimensional division
- H04L5/0005—Time-frequency
- H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT
- H04L5/001—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT the frequencies being arranged in component carriers
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0032—Distributed allocation, i.e. involving a plurality of allocating devices, each making partial allocation
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0058—Allocation criteria
- H04L5/006—Quality of the received signal, e.g. BER, SNR, water filling
Definitions
- the following description relates to a wireless communication system, and more particularly, to a method and apparatus for managing system information in a wireless communication system supporting multiple carriers.
- uplink bandwidth and downlink bandwidth are generally symmetrical to each other.
- ITU International Telecommunication Union
- carrier aggregation Bandwidth Aggregation
- Spectrum Aggregation for efficient use of fragmented small bands to achieve the same effect as combining multiple bands physically in the frequency domain and using bands of logically large bands.
- Carrier Aggregation (CA) technology is introduced to support increased throughput, to prevent cost increase due to the introduction of wideband RF devices, and to ensure compatibility with existing systems.
- Carrier aggregation refers to data between a terminal and a base station through a plurality of bundles of carriers in a bandwidth unit defined in a conventional wireless communication system (LTE system in case of LTE-A system, or IEEE 802.16e system in case of IEEE 802.16m system). It is a technology that can be exchanged.
- the carrier of the bandwidth unit defined in the existing wireless communication system may be referred to as a component carrier (CC).
- the carrier aggregation technology may include a technology that supports a system bandwidth of up to 5 MHz by combining up to 5 CCs even though one CC supports a bandwidth of 5 MHz, 10 MHz, or 20 MHz.
- the UE may receive a paging message including information indicating system information modification by monitoring the downlink channel.
- a multi-carrier is applied by a carrier aggregation technology, a method of receiving information on system information change by the terminal has not been specifically discussed.
- the present invention provides a method and apparatus for efficiently receiving a paging message including information on system information change by a terminal in using carrier aggregation technology.
- a method for acquiring system information by a terminal in a wireless communication system supporting multiple carriers includes a system information change (sysemInfoModification) of one or more component carriers from a base station.
- Receiving a message including information determining whether system information of a component carrier set in the terminal among the plurality of component carriers is changed, from information on system information change of the one or more component carriers; If it is determined that the system information of the component carrier set to the changed, it may include the step of obtaining the changed system information of the component carrier set to the terminal.
- the information on the change of the system information of the one or more component carriers may be information indicating whether to change the system information on each of the one or more component carriers.
- the information on the change of the system information of the at least one component carrier may be information on the change of the system information of all component carriers provided by the base station.
- the receiving of the message may be performed by monitoring one preset downlink component carrier.
- the predetermined downlink component carrier may be a downlink primary component carrier or a P-cell.
- the acquiring of the changed system information may be performed through a component carrier determined that system information is to be changed among component carriers set in the terminal.
- the receiving of the message may be performed in an nth modification period, and the obtaining of the changed system information may be performed in an n + 1th modification period.
- the component carrier configured for the terminal may include one or more of one or more uplink component carriers or one or more downlink component carriers configured for the terminal.
- the message may be a paging message.
- a method for providing system information to a terminal by a base station includes a system information change (sysemInfoModification) of one or more component carriers. Transmitting a message including information, and transmitting changed system information of the one or more component carriers, wherein the message including information on a change of system information of the one or more component carriers is transmitted by the terminal.
- the information on the change of the system information of the one or more component carriers may be information indicating whether to change the system information on each of the one or more component carriers.
- the information on the change of the system information of the at least one component carrier may be information on the change of the system information of all component carriers provided by the base station.
- the message may be transmitted through a downlink channel on a predetermined downlink component carrier.
- the predetermined downlink component carrier may be a downlink primary component carrier or a P-cell.
- the changed system information may be obtained by the terminal through a component carrier determined that system information is to be changed among the component carriers set in the terminal.
- the transmitting of the message may be performed in an nth modification period, and the transmitting of the changed system information may be performed in an n + 1th modification period.
- the component carrier configured for the terminal may include one or more of one or more uplink component carriers or one or more downlink component carriers configured for the terminal.
- the message may be a paging message.
- a terminal for acquiring system information in a wireless communication system supporting multiple carriers performs a radio resource control (RRC) connection control function including paging.
- RRC radio resource control
- a processor including a physical layer module configured to receive a message including information on system information change (sysemInfoModification) of at least one component carrier from a base station through the physical layer module, wherein the RRC layer is received.
- Modulation of system information of the one or more component carriers through a module Determining whether the system information of the component carrier set to the terminal among the plurality of component carriers is changed, and when the system information of the component carrier set to the terminal is to be changed, the configuration set to the terminal. It can be configured to obtain the changed system information of the carrier.
- a base station providing system information in a wireless communication system supporting multiple carriers performs a radio resource control (RRC) connection control function including paging.
- RRC radio resource control
- a processor wherein the processor transmits a message including information on a system information change (sysemInfoModification) of one or more component carriers through the physical layer module, and transmits changed system information of the one or more component carriers. And configured to change system information of the one or more component carriers.
- the message including the information about is used by the terminal to determine whether the system information of the component carrier set to the terminal of the one or more component carriers are changed, the changed system information of the one or more component carriers When it is determined that the system information of the component carrier set to the terminal is to be changed, the changed system information of the component carrier set to the terminal may be obtained by the terminal.
- the terminal can efficiently receive a paging message including information on the system information change. Accordingly, the battery consumption of the terminal is reduced, and the terminal can accurately and efficiently obtain changed system information on the component carrier set in the terminal.
- 1 is a diagram showing the structure of a wireless communication system.
- FIG. 2 is a diagram illustrating a control plane of a wireless protocol.
- 3 is a diagram illustrating a user plane of a wireless protocol.
- FIG. 4 is a diagram illustrating carrier aggregation.
- 5 is a diagram illustrating a structure of a downlink L2 (second layer) in carrier aggregation.
- FIG. 6 is a diagram illustrating a structure of an uplink L2 (second layer) in carrier aggregation.
- FIG. 7 is a diagram for describing transmission of a paging channel.
- FIG. 8 is a diagram for describing a method of transmitting information and system information about system information change.
- FIG. 9 is a diagram for describing a method of managing system information using a paging message according to an embodiment of the present invention.
- FIG. 10 is a view for explaining the configuration of a terminal device according to an embodiment of the present invention.
- each component or feature may be considered to be optional unless otherwise stated.
- Each component or feature may be embodied in a form that is not combined with other components or features.
- some components and / or features may be combined to form an embodiment of the present invention.
- the order of the operations described in the embodiments of the present invention may be changed. Some components or features of one embodiment may be included in another embodiment or may be replaced with corresponding components or features of another embodiment.
- the base station has a meaning as a terminal node of the network that directly communicates with the terminal.
- the specific operation described as performed by the base station in this document may be performed by an upper node of the base station in some cases.
- a 'base station (BS)' may be replaced by terms such as a fixed station, a Node B, an eNode B (eNB), an access point (AP), and the like.
- the repeater may be replaced by terms such as relay node (RN) and relay station (RS).
- the term “terminal” may be replaced with terms such as a user equipment (UE), a mobile station (MS), a mobile subscriber station (MSS), a subscriber station (SS), and the like.
- Embodiments of the present invention may be supported by standard documents disclosed in at least one of the wireless access systems IEEE 802 system, 3GPP system, 3GPP LTE and LTE-Advanced (LTE-A) system and 3GPP2 system. That is, steps or parts which are not described to clearly reveal the technical spirit of the present invention among the embodiments of the present invention may be supported by the above documents. In addition, all terms disclosed in the present document can be described by the above standard document.
- CDMA code division multiple access
- FDMA frequency division multiple access
- TDMA time division multiple access
- OFDMA orthogonal frequency division multiple access
- SC-FDMA single carrier frequency division multiple access
- CDMA may be implemented with a radio technology such as Universal Terrestrial Radio Access (UTRA) or CDMA2000.
- TDMA may be implemented with wireless technologies such as Global System for Mobile communications (GSM) / General Packet Radio Service (GPRS) / Enhanced Data Rates for GSM Evolution (EDGE).
- GSM Global System for Mobile communications
- GPRS General Packet Radio Service
- EDGE Enhanced Data Rates for GSM Evolution
- OFDMA may be implemented in a wireless technology such as IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802-20, Evolved UTRA (E-UTRA).
- UTRA is part of the Universal Mobile Telecommunications System (UMTS).
- 3rd Generation Partnership Project (3GPP) long term evolution (LTE) is part of an Evolved UMTS (E-UMTS) using E-UTRA, and employs OFDMA in downlink and SC-FDMA in uplink.
- LTE-A Advanced
- WiMAX can be described by the IEEE 802.16e standard (WirelessMAN-OFDMA Reference System) and the advanced IEEE 802.16m standard (WirelessMAN-OFDMA Advanced system). For clarity, the following description focuses on the 3GPP LTE and LTE-A standards, but the technical spirit of the present invention is not limited thereto.
- the LTE system is a mobile communication system evolved from the UMTS system.
- the LTE system structure can be broadly classified into an Evolved UMTS Terrestrial Radio Access Network (E-UTRAN) and an Evolved Packet Core (EPC).
- E-UTRAN is composed of a UE (User Equipment, UE) and an eNB (Evolved NodeB, eNB), and is called a Uu interface between the UE and the eNB, and an X2 interface between the eNB and the eNB.
- UE User Equipment
- eNB evolved NodeB
- the EPC consists of a Mobility Management Entity (MME) that handles the control plane and a Serving Gateway (S-GW) that handles the user plane.
- MME Mobility Management Entity
- S-GW Serving Gateway
- the S1-MME interface is used between the eNB and the MME.
- the eNB and the S-GW are called S1-U interfaces, and they are collectively called S1 interfaces.
- the radio interface protocol (Radio Interface Protocol) is defined in the Uu interface, which is a radio section, and consists of a physical layer, a data link layer, and a network layer horizontally. Is divided into a user plane for user data transmission and a control plane for signaling (control signal) transmission.
- This air interface protocol is based on the lower three layers of the Open System Interconnection (OSI) reference model, which is widely known in communication systems.
- OSI Open System Interconnection
- FIGS. 2 and 3 Description of each radio protocol layer shown in FIGS. 2 and 3 is as follows. 2 is a diagram illustrating a control plane of a radio protocol, and FIG. 3 is a diagram illustrating a user plane of a radio protocol.
- a physical layer (PHY) layer which is a first layer, provides an information transfer service to a higher layer by using a physical channel.
- the PHY layer is connected to the upper Medium Access Control (MAC) layer through a transport channel, and data between the MAC layer and the PHY layer moves through this transport channel.
- the transport channel is largely divided into a dedicated transport channel and a common transport channel according to whether the channel is shared. Then, data is transferred between different PHY layers, that is, between PHY layers of a transmitting side and a receiving side through a physical channel using radio resources.
- the media access control (MAC) layer serves to map various logical channels to various transport channels, and also plays a role of logical channel multiplexing to map multiple logical channels to one transport channel.
- the MAC layer is connected to a Radio Link Control (RLC) layer, which is a higher layer, by a logical channel, and the logical channel is a control channel that transmits information on the control plane according to the type of information to be transmitted. It is divided into (Control Channel) and Traffic Channel that transmits user plane information.
- RLC Radio Link Control
- the RLC layer of the second layer performs segmentation and concatenation of data received from the upper layer to adjust the data size so that the lower layer is suitable for transmitting data in a wireless section.
- the AM RLC performs a retransmission function through an Automatic Repeat and Request (ARQ) function for reliable data transmission.
- ARQ Automatic Repeat and Request
- the Packet Data Convergence Protocol (PDCP) layer of the second layer is an IP containing relatively large and unnecessary control information for efficient transmission in a low bandwidth wireless section when transmitting IP packets such as IPv4 or IPv6. Performs Header Compression which reduces the packet header size. This transmits only the necessary information in the header portion of the data, thereby increasing the transmission efficiency of the wireless section.
- the PDCP layer also performs a security function, which is composed of encryption (Ciphering) to prevent third-party data interception and integrity protection (Integrity protection) to prevent third-party data manipulation.
- the radio resource control (RRC) layer located at the top of the third layer is defined only in the control plane, and the configuration, re-configuration, and release of radio bearers (RBs) are performed. It is responsible for controlling logical channels, transport channels and physical channels.
- the radio bearer (RB) refers to a logical path provided by the first and second layers of the radio protocol for data transmission between the terminal and the UTRAN, and in general, the establishment of the RB means a radio protocol required to provide a specific service.
- RB is divided into SRB (Signaling RB) and DRB (Data RB). SRB is used as a channel for transmitting RRC messages in the control plane, and DRB is used as a channel for transmitting user data in the user plane.
- CA carrier aggregation
- bandwidth sizes of component carriers used for carrier aggregation may be the same or different.
- Each component carrier also has a different frequency band (or center frequency).
- each component carrier may exist on a continuous frequency band, component carriers existing on a discontinuous frequency band may be used for carrier aggregation.
- bandwidth sizes of uplink and downlink may be symmetrically allocated or asymmetrically allocated.
- the PCC may be referred to as a P-cell (P-cell; Primary Cell), and the SCC may be referred to as an S-Cell (Secondary Cell).
- the primary component carrier refers to a carrier used by a base station to exchange traffic and control signaling with a terminal.
- the control signaling may include addition of a component carrier, configuration of a primary component carrier, an UL grant or a DL assignment.
- a terminal belonging to the base station may be configured to have only one main component carrier. If the terminal operates in a single carrier mode, the main component carrier is used. Therefore, the main component carrier should be set to satisfy all the requirements for the exchange of data and control signaling between the base station and the terminal so that they can be used independently.
- the secondary component carrier refers to an additional component carrier that can be activated or deactivated according to the amount of data transmitted and received.
- the secondary component carrier may be set to be used only according to specific commands and rules received from the base station.
- the secondary component carrier may be set to be used with the primary component carrier to support additional bandwidth.
- a control signal such as an uplink grant or downlink allocation may be received from the base station to the terminal through the activated secondary component carrier, and the channel quality indicator (CQI) and the precoding matrix indicator (Precoding Matrix) from the terminal to the base station.
- a control signal through an uplink such as an Index (PMI), a Rank Indicator (RI), and a Sounding Reference Signal (SRS) may be transmitted.
- PMI Index
- RI Rank Indicator
- SRS Sounding Reference Signal
- Resource allocation to the terminal may have a range of a primary component carrier and a plurality of secondary component carriers.
- the system allocates secondary carriers asymmetrically to downlink and / or uplink based on system load (i.e. static / dynamic load balancing), peak data rate, or quality of service requirements. It may be.
- system load i.e. static / dynamic load balancing
- peak data rate i.e. peak data rate
- quality of service requirements i.e. static / dynamic load balancing
- configuration of a component carrier is provided to a user equipment from a base station after an RRC connection procedure.
- RRC connection means that the terminal is allocated radio resources based on the RRC signaling exchanged between the RRC layer of the terminal and the network through the SRB.
- the terminal may be provided with configuration information on the primary component and the secondary component carrier from the base station.
- the configuration information on the secondary carrier may include addition / deletion (or activation / deactivation) of the secondary carrier. Therefore, in order to activate the secondary component carrier or deactivate the existing secondary component carrier between the base station and the terminal it is necessary to perform the exchange of RRC signaling and MAC Control Element (MAC Control Element).
- the activation or deactivation of the secondary component carrier may be determined by the base station based on quality of service (QoS), the load condition of the carrier and other factors.
- the base station may instruct the UE to configure the secondary component carrier using a control message including information such as an indication type (activation / deactivation) for the downlink / uplink and a secondary component carrier list.
- FIGS. 5 and 6 A structure of L2 (second layer) in consideration of carrier aggregation technology will be described with reference to FIGS. 5 and 6.
- 5 is a diagram illustrating a structure of downlink L2 (second layer) in carrier aggregation
- FIG. 6 is a diagram illustrating a structure of uplink L2 (second layer) in carrier aggregation.
- the PDCP 510, RLC 520, and MAC 530 layers are shown.
- the elements 505, 515, 525, 535 circled in the interface between each layer in FIG. 5 represent Service Access Points (SAP) for peer-to-peer communication.
- SAP Service Access Points
- the SAP between the PHY channel (not shown) and the MAC layer provides a transport channel (535), and the SAP between the MAC layer and the RLC layer provides a logical channel (525).
- the general operation of each layer is as described above.
- multiple logical channels ie, radio bearers
- the multiplexing entities 531 of the MAC layer are related to the application of Multiple Input Multiple Output (MIMO) technology.
- MIMO Multiple Input Multiple Output
- one transport channel is generated by multiplexing a plurality of logical channels in the case of non-MIMO, so that one HARQ entity (Hybrid Automatic Repeat) is used in one multiplexing entity 531. and Request Entity) is provided (not shown).
- a plurality of transport channels corresponding to a plurality of component carriers are generated from one multiplexing entity 531.
- one HARQ entity 532 manages one component carrier.
- a plurality of HARQ entities 532 are provided to one multiplexing entity 531 and perform operations related thereto.
- each HARQ entity 532 independently processes a transport block, a plurality of transport blocks may be simultaneously transmitted and received through a plurality of component carriers.
- the same operation as the downlink L2 structure 500 of FIG. 5 is performed except that one multiplexing entity 630 is included in one MAC layer 630. do. That is, a plurality of HARQ entities 632 are provided for a plurality of component carriers, operations related to the plurality of HARQ entities 632 are performed in the MAC layer 630, and a plurality of transport blocks are provided through the plurality of component carriers. Transmit and receive at the same time.
- PDCCH Physical Downlink Control Channel
- the Physical Downlink Control Channel is one of downlink control channels used in the 3GPP LTE system.
- the PDCCH may include paging information of a paging channel (PCH).
- a plurality of PDCCHs may be transmitted in the control region, and the terminal may monitor the plurality of PDCCHs.
- the base station determines the PDCCH format according to downlink control information (DCI) transmitted to the terminal, and adds a cyclic redundancy check (CRC) to the control information.
- DCI downlink control information
- CRC cyclic redundancy check
- the CRC is masked with an identifier called a Radio Network Temporary Identifier (RNTI) according to the owner or purpose of the PDCCH. For example, if the PDCCH is for a paging message, a Paging Indicator Identifier (P-RNTI) may be masked to the CRC.
- RNTI Radio Network Temporary Identifier
- a transmission of a paging channel will be described with reference to FIG. 7.
- Discontinuous Reception relates to an operation of when the base station sends information on radio resource allocation to the terminal in the process of communication between the base station and the terminal.
- Always monitoring the downlink channel, especially the PDCCH, through which the terminal transmits information related to the radio resource allocation causes power consumption.
- the base station transmits radio resource allocation information to the terminal through the PDCCH only at a specific time, and the terminal receives the radio resource allocation information through the PDCCH only at the specific time.
- power consumption can be reduced by turning off its receiving module.
- the UE When receiving the paging message, the UE may perform discontinuous reception (DRX) for the purpose of reducing power consumption.
- the network configures a plurality of paging occasions (Paging Occasion) for each time period called a paging DRX Cycle, and allows a specific terminal to attempt and acquire a paging message only at a specific paging opportunity time.
- the terminal does not receive a paging channel at a time other than the specific paging opportunity time.
- One paging opportunity time corresponds to one TTI.
- the terminal receives the downlink channel for each designated paging opportunity time. That is, the UE wakes up in a subframe corresponding to the corresponding paging opportunity time and receives the PDCCH. At this time, if a P-RNTI (Paging-RNTI) corresponding to paging is received through the PDCCH, the UE receives a radio resource indicated by the PDCCH. The actual paging message is transmitted through the radio resource indicated by the PDCCH. The terminal receives a paging message, checks whether there is an identifier (for example, an identifier such as an International Mobile Subscriber Identity (IMSI) assigned to it), and if there is a matching identifier, notifies that paging has arrived.
- an identifier for example, an identifier such as an International Mobile Subscriber Identity (IMSI) assigned to it
- System Information includes parameters required for the terminal to obtain other information from the base station.
- SI System Information
- Notification of system information change is the base station to inform the terminal of the information on the change of the system information, which should be performed first when the base station changes the system information. Changes in system information only occur in specific radio frames and use the concept of a modification period for notification of changes in this system information.
- the modification section consists of a specific number of radio frames. System information may be transmitted a plurality of times with the same content during one modification period. The base station may perform a change notification of the system information in the n-th modification period and transmit the changed system information to the terminal in the n + 1th modification period.
- the terminal Upon receiving the change notification in the modification section n, the terminal operates to acquire new (updated) system information immediately after the start of the next modification section n + 1. The terminal applies the old system information until the new system information is acquired.
- the paging message is used to notify the system information change to both the terminals of the RRC_IDLE state and the terminals of the RRC_CONNECTED state.
- the paging message may include systemInfoModification information indicating a change in system information. If the terminal receives a paging message including systemInfoModification information in a specific modification section, the terminal may know that system information is changed in the next modification section.
- the paging message only informs the fact that the system information has changed, and does not include information on what system information has changed. That is, the UE can only know whether the change of the system information will occur from the presence / absence of the systemInfoModification information in the paging message.
- CA carrier aggregation
- the base station may set a plurality of component carriers (CC) to the terminal in order to communicate with the terminal using the CA function.
- a base station transmits system information related to a corresponding CC to terminals through respective CCs in order to operate the CCs. For example, assuming that there are two CCs (hereinafter referred to as CC (a) and CC (b)), the base station transmits system information related to CC (a) through CC (a), and CC (b). System information related to) is transmitted through CC (b).
- CC (a) CC (b)
- the terminal attempts to receive a paging message transmitted from each DL CC to grasp the fact that the system information for each CC has changed. That is, whether to change the system information for the CC (a) can be known only through the paging message on the DL CC (a), and whether to change the system information for the CC (b) can be known only through the paging message on the DL CC (b). Therefore, the terminal should not only receive a paging message transmitted from the DL CC (a) but also attempt to receive a paging message transmitted from the DL CC (b).
- the terminal receives all the paging messages transmitted through the respective CCs to determine the fact that the system information transmitted through these CCs has changed. Since it must try, the battery consumption of the terminal can be increased.
- the terminal may be configured to monitor only a specific CC. That is, in order to prevent battery consumption of the UE, the terminal may be configured to attempt to receive a paging message through only a specific CC (eg, a main component carrier (or P-Cell)).
- a specific CC eg, a main component carrier (or P-Cell)
- the information about the system information change on the corresponding carrier on which the paging message is transmitted may be included in the paging message, and the information about the system information change on the other carrier is included in the paging message. It doesn't work.
- the terminal does not monitor the paging message (especially information indicating whether to change the system information included in the paging message) for the remaining CC (for example, secondary component carrier (or S-Cell)) set to the terminal, Even if the system information of the remaining CCs is changed, the terminal may not attempt to acquire the corresponding system information.
- the remaining CC for example, secondary component carrier (or S-Cell)
- the base station transmits a paging message including information on the change of the system information for each of the plurality of CCs to the terminal, the terminal receives the paging message changes the system information of the CC set for the terminal After determining whether there is, and propose a method for obtaining the system information of the CC.
- matters that can be selectively applied to the present invention will be described in detail.
- the terminal may attempt to receive the paging message only through a predetermined CC.
- the information on the preset CC, through which the paging message is transmitted may be set from the base station to the terminal or may be set according to a rule specified in the standard. Specifically, if it is assumed that a plurality of CCs configured in the terminal are CC (1), CC (2) and CC (3), attempting to receive a paging message only in one of the CC according to the above configuration.
- the paging message may be received at the terminal through a main component carrier (or P-cell).
- an attempt to receive a paging message means that the P-RNTI attempts to receive a PDCCH that is masked and transmitted to the CRC.
- the paging message may include information on change of system information of a plurality of CCs.
- the paging message may include information about system information change for all CCs provided by the base station.
- the paging message received by the terminal may include the change information of the system information for the CCs that are not set in the terminal, but the terminal only considers information about the CCs set in the terminal.
- the paging message may include systemInfoModification information for each CC.
- the base station provides five CCs, and that each CC is divided into CC (1), CC (2), CC (3), CC (4), CC (5).
- the base station tries to change the system information for the CC (2) and CC (4) in the n + 1th modification period (modification period)
- the base station is the systemInfoModification information and CC ( The systemInfoModification information of 4) is included in the paging message and transmitted to the terminal. Thereafter, the changed system information about the CC (2) and CC (4) is transmitted to the terminal in the n + 1 th correction period.
- the terminal determines that system information of the corresponding CC will be changed. For example, assume that CC (1) and CC (3) is set for the terminal. In addition, it is assumed that the paging message includes systemInfoModification information for each of CC (2), CC (3) and CC (4). In this case, since the terminal is a CC set by the CC 3 of the systemInfoModification information for each CC included in the paging message, the terminal determines that the system information of the CC 3 will be changed. After that, the acquisition of system information of the CC 3 is attempted in the next modification section.
- the terminal may operate to acquire the changed system information transmitted to the corresponding CC immediately after the start of the next modification section.
- obtaining system information refer to 5.2.2 of standard document 3GPP LTE TS36.331 v8.6.0 (2009-06).
- the above-described specific CC may be classified into an uplink CC (UL CC) and a downlink CC (DL CC), and the changed system information of the specific CC is transmitted through the DL CC.
- UL CC uplink CC
- DL CC downlink CC
- CC (A) and CC (B) are configured for the terminal by the base station for the CA function.
- the two CCs may include both a UL CC and a DL CC, respectively. That is, the UE is configured to use two UL CCs (hereinafter referred to as UL (A) and UL (B)) and two DL CCs (hereinafter referred to as DL (A) and DL (B)).
- UL (A) is mapped to DL (A)
- UL (B) is mapped to DL (B).
- the terminal may be configured to monitor only a specific DL CC to receive a paging message from the base station. For example, the terminal monitors only the DL CC (A) to receive the paging message (step S910).
- the terminal receives the PDCCH on the DL CC (A) every designated paging opportunity time.
- the terminal may receive a paging message from the base station by receiving a radio resource indicated by the PDCCH (step S920). It is assumed that the paging message is received in the nth modification period.
- the base station may include information (systemInfoModification information) indicating whether to change the system information for each of the plurality of CC in the paging message.
- the information on the change of the system information of the plurality of CCs may be included in the paging message regardless of whether the CC is set in the corresponding terminal.
- the information indicating whether to change the system information for all the CC provided by the base station may be included in the paging message.
- systemInfoModification information for each corresponding CC may be included in a paging message.
- the paging message from the base station may include systemInfoModification information indicating a change in system information for CC (B) and systemInfoModification information indicating a change in system information for CC (C).
- CC (C) corresponds to a CC that is not set in the terminal, but may be included in the paging message received by the terminal.
- the terminal After receiving the paging message, the terminal receives the CCs (CC (A) and CC (B)) set for it and information on the change of system information for each CC included in the paging message (that is, the system of CC (B)). Using the information on the information change and the information on the system information change of the CC (C), it may be determined what CC the system information needs to be acquired (step S930). For example, CC (A) and CC (B) are set for the terminal, and the paging message includes information on system information change of CC (B) and system information change of CC (C). As such, the terminal knows that the system information of the CC (B) is to be changed and determines that acquisition of the system information of the CC (B) is required.
- the terminal may acquire system information of CC (B) in the n + 1th modification period (step S940). Specifically, since the system information of the CC (B) is transmitted through the DL CC (B), the terminal acquires the system information of the CC (B) through the DL CC (B).
- the terminal receives a paging message including information indicating a change in system information for each of the plurality of CCs through only the DL CC (A). It is not limited to sending only through). That is, the base station may transmit the same paging message (a paging message including information indicating system information change for each of a plurality of CCs) through all or some DL CCs provided by the base station, and a plurality of DLs from the receiving point of view of the terminal. This means monitoring only a specific DL CC among CCs.
- a specific DL CC eg, a downlink primary component carrier (or P-Cell)
- P-Cell downlink primary component carrier
- the base station transmits a paging message including information on a plurality of system information change for each CC to the terminal, and thus the terminal may obtain the system information of the CC. Since the terminal uses only one CC for monitoring the paging message, it is possible to reduce the battery consumption of the terminal. In addition, even if a paging message is received through only one CC, since the paging message includes information indicating a CC to be changed in system information among CCs set in the terminal, the terminal can obtain the changed system information of the CC. do.
- FIG. 10 is a view for explaining the configuration of a terminal apparatus and a base station apparatus according to an embodiment of the present invention.
- the terminal device UE may include a transmission module 1010, a reception module 1020, a processor 1030, a memory 1040, and an antenna.
- the transmission module 1010 may transmit various signals, data, and information on one or more uplink component carriers to the base station.
- the receiving module 1020 may receive various signals, data, and information on a downlink component carrier from the base station.
- the processor 1030 may control operations of the entire UE, including controlling transmission and reception of various signals, data, and information through the transmission module 1010 and the reception module 1020.
- the antenna may consist of a single antenna or a plurality of antennas. When a plurality of antennas are configured on at least one of a transmitting side and a receiving side, multiple input multiple output (MIMO) transmission may be supported.
- MIMO multiple input multiple output
- the processor 1030 of the terminal device may include a physical layer module 1031, a MAC layer module 1032, and an RRC layer module 1033.
- the physical layer module 1031 maps a transport channel from the MAC layer module 1032 to an uplink physical channel and transmits the same to a base station, receives and processes a downlink physical channel from the base station, and transmits the MAC layer module 1032 through the transport channel. ) Can be delivered.
- the physical layer module 1031 may be functionally connected to the MAC layer module 1032 to perform signal transmission through one or more uplink component carriers and signal reception through the one or more downlink component carriers.
- the physical layer module 1031 may monitor the PDCCH and receive a paging message, and may receive system information.
- the MAC layer module 1032 includes a plurality of HARQ entities corresponding to each of a plurality of component carriers, transmits signals through one or more uplink component carriers through a plurality of HARQ entities, and signals through one or more downlink component carriers. You can control the reception.
- the RRC layer module 1033 performs control functions of logical channels, transport channels, and physical channels in connection with setting, resetting, and releasing radio bearers (RBs).
- RB means a service provided by a second layer (MAC layer, RLC layer, PDCP layer) for data transmission between the terminal and the base station.
- MAC layer MAC layer, RLC layer, PDCP layer
- the RRC layer module 1033 exchanges RRC messages between the base station and the terminal.
- the RRC layer module 1033 performs an RRC connection control function including paging.
- the processor 1030 of the UE transmits a message including information on system information change (sysemInfoModification) of one or more component carriers from the base station through the physical layer module 1031.
- the message is a paging message.
- the information on the system information change may include the system information of all component carriers provided by the base station and may indicate whether the system information for each component carrier is changed.
- the processor 1030 may be further configured to receive the paging message by monitoring a PDCCH on one predetermined downlink component carrier (eg, downlink primary component carrier (or P-cell)).
- the processor 1030 may be further configured to receive the paging message in an nth modification period.
- the processor 1030 through the RRC layer module 1033, from the information on the change of the system information of the at least one component carrier, whether the system information of the component carrier set to the terminal of the plurality of component carriers is changed or not May be further configured to determine.
- the component carrier that determines whether system information is to be changed may include one or more of one or more uplink component carriers or one or more downlink component carriers configured for the terminal.
- the processor 1030 may further be configured to obtain changed system information of the component carrier set to the terminal when it is determined that system information of the component carrier set to the terminal is to be changed.
- the changed system information may be obtained in the n + 1th correction section.
- the processor 1030 performs a function of processing the information received by the terminal device, information to be transmitted to the outside, and the like
- the memory 1040 may store the processed information and the like for a predetermined time and may include a buffer (not shown). May be replaced by a component such as).
- the base station apparatus eNB may include a transmission module 1050, a reception module 1060, a processor 1070, a memory 1080, and an antenna.
- the transmission module 1050 may transmit various signals, data, and information on one or more downlink component carriers to the terminal.
- the receiving module 1060 may receive various signals, data, and information on the uplink component carrier from the terminal.
- the processor 1070 may control the overall operation of the base station apparatus eNB, including controlling transmission and reception of various signals, data, and information through the transmission module 1050 and the reception module 1060.
- the antenna may consist of a single antenna or a plurality of antennas. When a plurality of antennas are configured on at least one of a transmitting side and a receiving side, multiple input multiple output (MIMO) transmission may be supported.
- MIMO multiple input multiple output
- the processor 1070 of the base station apparatus may include a physical layer module 1071, a MAC layer module 1072, and an RRC layer module 1073.
- the physical layer module 1071 maps a transport channel from the MAC layer module 1072 to a downlink physical channel, and transmits it to the terminal.
- the physical layer module 1071 receives and processes an uplink physical channel from the terminal. ) Can be delivered.
- the physical layer module 1071 may be functionally connected to the MAC layer module 1072 to perform signal transmission through one or more uplink component carriers and signal reception through the one or more downlink component carriers.
- the physical layer module 1071 may transmit a paging message and system information.
- the MAC layer module 1072 includes a plurality of HARQ entities corresponding to each of a plurality of component carriers, and transmits signals through one or more uplink component carriers and signals through one or more downlink component carriers through the plurality of HARQ entities. You can control the reception.
- the RRC layer module 1073 performs control functions of logical channels, transport channels, and physical channels in connection with setting, resetting, and releasing radio bearers (RBs).
- RB means a service provided by a second layer (MAC layer, RLC layer, PDCP layer) for data transmission between the terminal and the base station.
- MAC layer MAC layer, RLC layer, PDCP layer
- the RRC layer module 1073 exchanges RRC messages between the base station and the terminal.
- the RRC layer module 1073 performs an RRC connection control function including paging.
- the processor 1070 of the base station apparatus eNB transmits a message including information on system information change (sysemInfoModification) of one or more component carriers through the physical layer module 1071.
- the message is a paging message.
- the information on the system information change may include the system information of all component carriers provided by the base station and may indicate whether the system information for each component carrier is changed.
- the processor 1070 may be further configured to transmit the paging message in an nth modification period.
- the paging message transmitted from the base station is received at the terminal to facilitate the acquisition of system information of the terminal. That is, the UE receives the paging message by monitoring a PDCCH on a predetermined downlink component carrier (for example, a downlink primary component carrier (or P-cell)) to receive the paging message. From the information on the system information change, it may be determined whether system information of a component carrier set in the terminal among the plurality of component carriers is changed.
- the component carrier for determining whether system information is to be changed may include one or more of one or more uplink component carriers or one or more downlink component carriers configured for the terminal.
- the processor 1070 of the base station apparatus may be further configured to transmit the changed system information.
- the changed system information may be transmitted in the n + 1th modification section.
- the processor 1070 performs a function of processing the information received by the terminal device, information to be transmitted to the outside, and the like
- the memory 1080 may store the processed information for a predetermined time and may include a buffer (not shown). May be replaced by a component such as).
- Embodiments of the present invention described above may be implemented through various means.
- embodiments of the present invention may be implemented by hardware, firmware, software, or a combination thereof.
- a method according to embodiments of the present invention may include one or more Application Specific Integrated Circuits (ASICs), Digital Signal Processors (DSPs), Digital Signal Processing Devices (DSPDs), and Programmable Logic Devices (PLDs). It may be implemented by field programmable gate arrays (FPGAs), processors, controllers, microcontrollers, microprocessors, and the like.
- ASICs Application Specific Integrated Circuits
- DSPs Digital Signal Processors
- DSPDs Digital Signal Processing Devices
- PLDs Programmable Logic Devices
- FPGAs field programmable gate arrays
- processors controllers, microcontrollers, microprocessors, and the like.
- the method according to the embodiments of the present invention may be implemented in the form of a module, a procedure, or a function that performs the functions or operations described above.
- the software code may be stored in a memory unit and driven by a processor.
- the memory unit may be located inside or outside the processor, and may exchange data with the processor by various known means.
- the present invention is not necessarily limited thereto and may be used in the same manner for the UE to perform the system information management method in various mobile communication systems to which carrier aggregation technology is applied. have.
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Abstract
Description
Claims (20)
- 다중 반송파를 지원하는 무선 통신 시스템에서 단말이 시스템 정보를 획득하는 방법으로서,기지국으로부터 하나 이상의 구성반송파의 시스템 정보 변경(sysemInfoModification)에 대한 정보를 포함하는 메시지를 수신하는 단계;상기 하나 이상의 구성반송파의 시스템 정보 변경에 대한 정보로부터, 상기 복수개의 구성반송파 중 상기 단말에게 설정된 구성반송파의 시스템 정보가 변경될지 여부를 판정하는 단계;상기 단말에게 설정된 구성반송파의 시스템 정보가 변경될 것으로 판정하는 경우, 상기 단말에게 설정된 구성반송파의 변경된 시스템 정보를 획득하는 단계를 포함하는, 시스템 정보 획득 방법.
- 제 1 항에 있어서,상기 하나 이상의 구성반송파의 시스템 정보 변경에 대한 정보는, 상기 하나 이상의 구성반송파 각각에 대한 시스템 정보 변경 여부를 나타내는 정보인, 시스템 정보 획득 방법.
- 제 1 항에 있어서,상기 하나 이상의 구성반송파의 시스템 정보 변경에 대한 정보는, 상기 기지국이 제공하는 모든 구성반송파의 시스템 정보 변경에 대한 정보인, 시스템 정보 획득 방법.
- 제 1 항에 있어서,상기 메시지를 수신하는 단계는, 기설정된 하나의 하향링크 구성반송파를 모니터링함으로써 수행되는, 시스템 정보 획득 방법.
- 제 4 항에 있어서,상기 기설정된 하나의 하향링크 구성반송파는 하향링크 주구성반송파 또는 P-cell 인, 시스템 정보 획득 방법.
- 제 1 항에 있어서,상기 변경된 시스템 정보를 획득하는 단계는, 상기 단말에게 설정된 구성반송파 중에서 시스템 정보가 변경될 것으로 판정된 구성반송파를 통하여 수행되는, 시스템 정보 획득 방법.
- 제 1 항에 있어서,상기 메시지를 수신하는 단계는 n 번째 수정구간(modification period)에서 수행되고,상기 변경된 시스템 정보를 획득하는 단계는 n+1 번째 수정구간에서 수행되는, 시스템 정보 획득 방법.
- 제 1 항에 있어서,상기 단말에게 설정된 구성반송파는, 상기 단말에게 설정된 하나 이상의 상향링크 구성반송파 또는 하나 이상의 하향링크 구성반송파 중 하나 이상을 포함하는, 시스템 정보 획득 방법.
- 제 1 항에 있어서,상기 메시지는 페이징 메시지인, 시스템 정보 획득 방법.
- 다중 반송파를 지원하는 무선 통신 시스템에서 기지국이 단말에게 시스템 정보를 제공하는 방법으로서,하나 이상의 구성반송파의 시스템 정보 변경(sysemInfoModification)에 대한 정보를 포함하는 메시지를 전송하는 단계; 및상기 하나 이상의 구성반송파의 변경된 시스템 정보를 전송하는 단계를 포함하고,상기 하나 이상의 구성반송파의 시스템 정보 변경에 대한 정보를 포함하는 메시지는, 상기 단말에 의해서 상기 하나 이상의 구성반송파 중 상기 단말에게 설정된 구성반송파의 시스템 정보가 변경될지 여부를 판정하는 데에 이용되고,상기 하나 이상의 구성반송파의 변경된 시스템 정보는, 상기 단말에게 설정된 구성반송파의 시스템 정보가 변경될 것으로 판정되는 경우에, 상기 단말에게 설정된 구성반송파의 변경된 시스템 정보로서 상기 단말에 의해서 획득되는, 시스템 정보 제공 방법.
- 제 10 항에 있어서,상기 하나 이상의 구성반송파의 시스템 정보 변경에 대한 정보는, 상기 하나 이상의 구성반송파 각각에 대한 시스템 정보 변경 여부를 나타내는 정보인, 시스템 정보 제공 방법.
- 제 10 항에 있어서,상기 하나 이상의 구성반송파의 시스템 정보 변경에 대한 정보는, 상기 기지국이 제공하는 모든 구성반송파의 시스템 정보 변경에 대한 정보인, 시스템 정보 제공 방법.
- 제 10 항에 있어서,상기 메시지는, 기설정된 하나의 하향링크 구성반송파 상의 하향링크채널을 통하여 전송되는, 시스템 정보 제공 방법.
- 제 10 항에 있어서,상기 기설정된 하나의 하향링크 구성반송파는 하향링크 주구성반송파 또는 P-cell 인, 시스템 정보 제공 방법.
- 제 10 항에 있어서,상기 변경된 시스템 정보는, 상기 단말에게 설정된 구성반송파 중에서 시스템 정보가 변경될 것으로 판정된 구성반송파를 통하여 상기 단말에 의해서 획득되는, 시스템 정보 제공 방법.
- 제 10 항에 있어서,상기 메시지를 전송하는 단계는 n 번째 수정구간(modification period)에서 수행되고,상기 변경된 시스템 정보를 전송하는 단계는 n+1 번째 수정구간에서 수행되는, 시스템 정보 제공 방법.
- 제 9 항에 있어서,상기 단말에게 설정된 구성반송파는, 상기 단말에게 설정된 하나 이상의 상향링크 구성반송파 또는 하나 이상의 하향링크 구성반송파 중 하나 이상을 포함하는, 시스템 정보 제공 방법.
- 제 9 항에 있어서,상기 메시지는 페이징 메시지인, 시스템 정보 획득 방법.
- 다중 반송파를 지원하는 무선 통신 시스템에서 시스템 정보를 획득하는 단말로서,페이징을 포함하는 무선자원제어(RRC) 연결 제어 기능을 수행하는 RRC 계층 모듈;단말에게 설정된 상기 다중 반송파를 통한 신호 전송 및 신호 수신을 제어하는 MAC 계층 모듈; 및상기 MAC 계층 모듈과 기능적으로 연결되어, 상기 단말에게 설정된 다중 반송파를 통한 신호 전송 및 신호 수신을 수행하는 물리계층 모듈을 포함하는프로세서를 포함하며,상기 프로세서는,상기 물리계층 모듈을 통하여, 기지국으로부터 하나 이상의 구성반송파의 시스템 정보 변경(sysemInfoModification)에 대한 정보를 포함하는 메시지를 수신하고,상기 RRC 계층 모듈을 통하여, 상기 하나 이상의 구성반송파의 시스템 정보 변경에 대한 정보로부터, 상기 복수개의 구성반송파 중 상기 단말에게 설정된 구성반송파의 시스템 정보가 변경될지 여부를 판정하며,상기 단말에게 설정된 구성반송파의 시스템 정보가 변경될 것으로 판정하는 경우, 상기 단말에게 설정된 구성반송파의 변경된 시스템 정보를 획득하도록 구성되는, 시스템 정보 획득 단말.
- 다중 반송파를 지원하는 무선 통신 시스템에서 시스템 정보를 제공하는 기지국으로서,페이징을 포함하는 무선자원제어(RRC) 연결 제어 기능을 수행하는 RRC 계층 모듈;상기 다중 반송파를 통한 신호 전송 및 신호 수신을 제어하는 MAC 계층 모듈; 및상기 MAC 계층 모듈과 기능적으로 연결되어, 상기 다중 반송파를 통한 신호 전송 및 신호 수신을 수행하는 물리계층 모듈을 포함하는프로세서를 포함하며,상기 프로세서는,상기 물리 계층 모듈을 통하여, 하나 이상의 구성반송파의 시스템 정보 변경(sysemInfoModification)에 대한 정보를 포함하는 메시지를 전송하고, 상기 하나 이상의 구성반송파의 변경된 시스템 정보를 전송하도록 구성되며,상기 하나 이상의 구성반송파의 시스템 정보 변경에 대한 정보를 포함하는 메시지는, 상기 단말에 의해서 상기 하나 이상의 구성반송파 중 상기 단말에게 설정된 구성반송파의 시스템 정보가 변경될지 여부를 판정하는 데에 이용되고,상기 하나 이상의 구성반송파의 변경된 시스템 정보는, 상기 단말에게 설정된 구성반송파의 시스템 정보가 변경될 것으로 판정되는 경우에, 상기 단말에게 설정된 구성반송파의 변경된 시스템 정보로서 상기 단말에 의해서 획득되는, 시스템 정보 제공 기지국.
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US13/379,281 US8817646B2 (en) | 2009-06-22 | 2010-06-14 | Method and apparatus for managing system information in wireless communication system supporting multi-carriers |
EP10792280.9A EP2448157B1 (en) | 2009-06-22 | 2010-06-14 | Method and apparatus for managing system information in wireless communication system supporting multi-carriers |
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PCT/KR2010/004005 WO2010151016A2 (en) | 2009-06-22 | 2010-06-21 | Method of performing measurement of terminal with applying cell type specific offset in wireless communication system |
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WO2010150998A3 (ko) | 2011-03-10 |
GB2482827B (en) | 2014-01-29 |
GB2482827A (en) | 2012-02-15 |
EP2448157A2 (en) | 2012-05-02 |
US20120099464A1 (en) | 2012-04-26 |
WO2010151016A2 (en) | 2010-12-29 |
WO2010151016A3 (en) | 2011-03-31 |
CN102804841A (zh) | 2012-11-28 |
KR20120111926A (ko) | 2012-10-11 |
EP2448157A4 (en) | 2015-10-07 |
US8817646B2 (en) | 2014-08-26 |
KR101632218B1 (ko) | 2016-06-22 |
EP2448157B1 (en) | 2017-12-13 |
CN102804841B (zh) | 2015-06-24 |
GB201120481D0 (en) | 2012-01-11 |
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