KR101458643B1 - Effective system information reception method - Google Patents

Effective system information reception method Download PDF

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Publication number
KR101458643B1
KR101458643B1 KR1020080057283A KR20080057283A KR101458643B1 KR 101458643 B1 KR101458643 B1 KR 101458643B1 KR 1020080057283 A KR1020080057283 A KR 1020080057283A KR 20080057283 A KR20080057283 A KR 20080057283A KR 101458643 B1 KR101458643 B1 KR 101458643B1
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South Korea
Prior art keywords
system information
period
change
information
change period
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KR1020080057283A
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Korean (ko)
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KR20080112118A (en
Inventor
천성덕
이영대
박성준
이승준
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엘지전자 주식회사
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Priority to US94534007P priority Critical
Priority to US60/945,340 priority
Priority to US95565107P priority
Priority to US60/955,651 priority
Application filed by 엘지전자 주식회사 filed Critical 엘지전자 주식회사
Priority claimed from PCT/KR2008/003477 external-priority patent/WO2008156314A2/en
Publication of KR20080112118A publication Critical patent/KR20080112118A/en
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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W48/00Access restriction; Network selection; Access point selection
    • H04W48/08Access restriction or access information delivery, e.g. discovery data delivery
    • H04W48/12Access restriction or access information delivery, e.g. discovery data delivery using downlink control channel
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B2201/00Indexing scheme relating to details of transmission systems not covered by a single group of H04B3/00 - H04B13/00
    • H04B2201/69Orthogonal indexing scheme relating to spread spectrum techniques in general
    • H04B2201/707Orthogonal indexing scheme relating to spread spectrum techniques in general relating to direct sequence modulation
    • H04B2201/70718Particular systems or standards
    • H04B2201/70724UMTS
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02DCLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THIR OWN ENERGY USE
    • Y02D70/00Techniques for reducing energy consumption in wireless communication networks
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02DCLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THIR OWN ENERGY USE
    • Y02D70/00Techniques for reducing energy consumption in wireless communication networks
    • Y02D70/10Techniques for reducing energy consumption in wireless communication networks according to the Radio Access Technology [RAT]
    • Y02D70/12Techniques for reducing energy consumption in wireless communication networks according to the Radio Access Technology [RAT] in 3rd Generation Partnership Project [3GPP] networks
    • Y02D70/124Techniques for reducing energy consumption in wireless communication networks according to the Radio Access Technology [RAT] in 3rd Generation Partnership Project [3GPP] networks in 3rd generation [3G] networks

Abstract

The present invention relates to a wireless communication system and a terminal for providing a wireless communication service, and more particularly, to a method of informing a terminal of information necessary for reception when the terminal is connected to the wireless communication system, Therefore, the base station updates the system information, and the terminal efficiently checks or receives the update of the system information in accordance with the period.
Wireless communication, terminal, system information, 3GPP, WCDMA

Description

[0001] The present invention relates to an effective system information reception method,

The present invention relates to a wireless communication system and a wireless terminal for providing a wireless communication service and a method for the wireless communication system to inform the terminal of information necessary for reception when the wireless terminal is connected to the wireless communication system, The base station updates the system information according to the period and the terminal checks or receives the update of the system information efficiently in accordance with the period.

1 is a diagram illustrating a network structure of an Evolved Universal Mobile Telecommunications System (E-UMTS), which is a conventional mobile communication system to which the present invention is applied. The E-UMTS system evolved from the existing UMTS system and is currently undergoing basic standardization work in 3GPP. The E-UMTS system may be referred to as an LTE (Long Term Evolution) system.

The E-UMTS network can be divided into E-UTRAN and CN. The E-UTRAN is composed of a User Equipment (hereinafter abbreviated as UE), a base station (hereinafter abbreviated as eNode B), and a Access Gateway (hereinafter abbreviated as AG) connected to the external network at the end of the network. The AG may be divided into a part for handling user traffic and a part for processing control traffic. In this case, a new interface between the AG for handling new user traffic and the AG for handling control traffic may be used to communicate with each other. One eNode B may have more than one cell. An interface for transmitting user traffic or control traffic may be used between eNode Bs. The CN may be configured as a node for user registration of the AG and other UEs. An interface for distinguishing between E-UTRAN and CN may be used.

The layers of the radio interface protocol of the UE and the network are classified into L1 (first layer), L2 (first layer), and L2 (third layer) based on the lower three layers of the Open System Interconnection (Second layer), and L3 (third layer). In the first layer, the physical layer provides an information transfer service using a physical channel, and the third layer A Radio Resource Control (RRC) layer located in the layer controls the radio resources between the UE and the MN. To this end, the RRC layer exchanges RRC messages between the UE and the MN.

2 and 3 show a structure of a radio interface protocol between a terminal based on the 3GPP radio access network standard and an evolved UMTS Terrestrial Radio Access Network (E-UTRAN). Particularly, Fig. 2 shows the structure of the control plane of the wireless protocol, and Fig. 3 shows the structure of the user plane of the wireless protocol.

The wireless interface protocol of FIGS. 2 and 3 horizontally consists of a physical layer, a data link layer, and a network layer, and vertically includes a user plane User Plane) and control plane (Control Plane) for transmitting control signal (Signaling). The protocol layers of FIG. 2 and FIG. 3 may be classified into L1 (first layer), L2 (second layer), and L2 (third layer) based on the lower three layers of an Open System Interconnection L3 (third layer). The layers of the wireless protocol control plane of FIG. 2 and the wireless protocol user plane of FIG. 3 are described below.

The physical layer as the first layer provides an information transfer service to an upper layer using a physical channel. The physical layer is connected to a medium access control layer (upper layer) through a transport channel, and data between the medium access control layer and the physical layer moves through the transport channel. Data is transferred between the different physical layers, that is, between the transmitting side and the receiving side physical layer through the physical channel. The physical channel is modulated by an Orthogonal Frequency Division Multiplexing (OFDM) scheme, and uses time and frequency as radio resources.

The Medium Access Control (MAC) of the second layer provides a service to a radio link control layer that is an upper layer through a logical channel. The second layer of Radio Link Control (RLC) layer supports the transmission of reliable data. The function of the RLC layer may be implemented as a functional block in the MAC layer. In this case, the RLC layer may not exist. In the wireless protocol user plane, the second layer PDCP layer reduces the IP packet header size, which is relatively large and contains unnecessary control information, in order to efficiently transmit an IP packet such as IPv4 or IPv6 in a low-bandwidth radio section It performs Header Compression function.

A Radio Resource Control (RRC) layer located at the uppermost layer of the third layer is defined only in the control plane and includes a configuration of a radio bearer (RB), a re- -configuration and release of the logical channel, the transport channel, and the physical channel. At this time, the RB means a service provided by the second layer for data transmission between the UE and the UTRAN. If there is an RRC connection between the RRC of the UE and the RRC layer of the wireless network, the UE is in the RRC Connected Mode, and if not, the UE is in the RRC Idle Mode.

The non-access stratum (NAS) layer located at the top of the RRC layer performs functions such as session management and mobility management.

One cell constituting the eNB is set to one of the bandwidths of 1.25, 2.5, 5, 10, 20Mhz and the like to provide a downlink or uplink transmission service to a plurality of UEs. At this time, different cells may be set to provide different bandwidths.

The downlink transmission channel for transmitting data from the network to the terminal includes a broadcast channel (BCH) for transmitting system information, a paging channel (PCH) for transmitting a paging message, and a downlink SCH ). In the case of traffic or control messages of downlink point-to-multipoint service (multicast or broadcast service), it may be transmitted via the downlink SCH, or may be transmitted via a separate downlink multicast channel (MCH). On the other hand, the uplink transmission channel for transmitting data from the UE to the network includes RACH (Random Access Channel) for transmitting an initial control message and an uplink SCH (Shared Channel) for transmitting user traffic or control messages.

A logical channel mapped to a transport channel is a broadcast control channel (BCCH), a paging control channel (PCCH), a common control channel (CCCH), an MBMS point-to-multipoint control channel / Multicast Control Channel (MTCH), and MBMS point-to-multipoint Traffic Channel / Multicast Traffic Channel (MTCH).

4 shows a prior art control channel transmission.

A physical channel is composed of several subframes on the time axis and a plurality of subcarriers on the frequency axis. Here, one sub-frame is composed of a plurality of symbols on the time axis. One subframe is composed of a plurality of resource blocks, and one resource block is composed of a plurality of symbols and a plurality of subcarriers. Also, each subframe may utilize specific subcarriers of the specific symbols (e.g., the first symbol) of the subframe for the Physical Downlink Control Channel (PDCCH), i.e., the L1 / L2 control channel. One subframe is 0.5 ms, and a transmission time interval (TTI), which is a unit time at which data is transmitted, is 1 ms corresponding to two subframes.

As described above, the two axes constituting the E-UTRAN in the E-UMTS system are the base station and the terminal, and the radio resources in one cell are composed of uplink radio resources and downlink radio resources. The base station is responsible for allocation and control of uplink radio resources and downlink radio resources of the cell. That is, the base station determines at what instant which terminal uses which radio resource. For example, the base station may decide to allocate a frequency of 100 MHz to 101 Mhz for 3.2 seconds to the user 1 for 0.2 seconds for downlink data transmission. After making the decision as described above, the base station informs the corresponding terminal of the fact that the terminal receives the downlink data. Similarly, the base station determines when a certain mobile station will transmit data using a certain amount of radio resources, and informs the mobile station of the fact that the mobile station transmits data during the time. In this way, the base station dynamically managing radio resources is very efficient in downlink data reception and uplink data transmission.

Conventionally, one terminal continuously uses one radio resource while a call is connected. This is unreasonable especially considering that many services in recent years are based on IP packets. This is because most packet services do not consistently transmit packets during the call connection time, but have many sections that do not transmit any packets. In such a situation, it is inefficient to continuously allocate radio resources to one UE.

To solve this problem, the E-UMTS system allocates radio resources to the mobile station only when the mobile station is needed, that is, while the service data is present.

Hereinafter, the RRC state (RRC state) and the RRC connection method of the UE will be described in detail. The RRC state refers to whether or not the RRC of the UE is a logical connection with the RRC of the E-UTRAN. When the RRC is connected, the RRC connected state is referred to as an RRC connected state. Since the UE in the RRC Connected state has the RRC connection, the E-UTRAN can grasp the existence of the UE in the cell unit, and thus can effectively control the UE. On the other hand, the terminal in the RRC idle state can not be grasped by the E-UTRAN, and is managed by the core network in a tracking area unit which is larger than the cell. That is, the RRC Idle state terminal only knows whether it exists in a large area, and it must move to the RRC Connected state in order to receive normal mobile communication services such as voice or data.

When the user first turns on the power of the UE, the UE first searches for an appropriate cell and stays in the RRC Idle state in the corresponding cell. When the UE having stayed in the RRC Idle state needs to establish an RRC connection, the UE establishes an RRC connection with the RRC of the E-UTRAN and converts the RRC connected state into an RRC connected state through an RRC connection procedure. There are many cases where the UE in the idle state needs to establish an RRC connection. For example, if uplink data transmission is required due to a user's call attempt or the like, or if a paging message is received from the E-UTRAN And transmission of a response message to the user.

The following describes the System Information. The system information includes essential information that the terminal needs to know in order to access the base station. Therefore, the terminal must receive all the system information before connecting to the base station, and always have the latest system information. Since the system information is information that all terminals in a cell should know, the base station periodically transmits the system information.

The System Information is divided into MIB, SB, and SIB. The MIB (Master Information Block) enables the UE to know the physical configuration of the cell, for example, Bandwidth. The SB (Scheduling Block) informs the transmission information of the SIBs, for example, the transmission period. SIB (System Information Block) is a collection of related system information. For example, some SIBs only contain information of surrounding cells, and some SIBs only contain information of uplink radio channels used by the UE.

As described above, in order to receive a proper service without causing congestion in the system in the prior art, the terminal must always have the latest system information. However, since the system information must be received by the terminal newly entering the cell or a newly powered-on terminal in a specific cell, the base station repeatedly transmits the system information repeatedly. In this case, always allowing the terminal to receive the System information causes a great problem to waste unnecessary power for the terminal that already has the latest System Information. Therefore, only when the system information actually changes, the terminal should read the system information.

Accordingly, the present invention provides a method and apparatus for maximizing the efficiency of radio resources by minimizing the radio resources of cells under the control of the base station transmitting control information, i.e., system information, necessary for accessing the base stations, A method for efficiently receiving and updating the system information when the system information is changed while minimizing power consumption of the terminal to receive the information is proposed.

According to another aspect of the present invention, there is provided a method of receiving system information for uplink connection in a wireless communication system, the method comprising: receiving the system information and period information related to a change of the system information; Determining whether the system information needs to be changed or not; If it is determined that the system information is changed, receiving new system information according to the period information.

Preferably, the period information includes at least one of a start point of a change period, a final point of the change period, and a total interval time of the change period.

Preferably, the period information indicates a minimum period in which the system information can be changed or a minimum period in which the base station can change the system information.

Preferably, the period information indicates a minimum time that the base station should wait for the next new system information after changing the system information.

Preferably, the period information indicates a maximum period for the UE to confirm whether the system information has been changed.

Advantageously, the period information indicates a start time for receiving the new system information.

Preferably, when the period information is received in a specific change period, the new system information is also received in the specific change period.

Advantageously, when the period information is received at a specific change period, the new system information is received at a change period other than the specific change period.

Advantageously, when the period information is received at a particular change period, the new system information is received at the next change period after the specific change period.

According to another aspect of the present invention, there is provided a method of transmitting system information for uplink access in a wireless communication system, the method comprising: transmitting the system information and period information related to a change of the system information; ; Notifying whether the system information is necessary or unchangeable; And transmitting new system information according to the period information if it is determined that the system information is changed.

Preferably, the period information includes at least one of a start point of a change period, a final point of the change period, and a total interval time of the change period.

Preferably, the period information indicates a minimum period in which the system information can be changed.

Preferably, the period information indicates a minimum period in which the base station can change the system information.

Preferably, the period information indicates a minimum time that the base station should wait for the next new system information after changing the system information.

Preferably, the period information indicates a maximum period for the UE to confirm whether the system information has been changed.

Preferably, the period information indicates a start time for transmitting the new system information.

Preferably, when the period information is transmitted in a specific change period, the new system information is also transmitted in the specific change period.

Preferably, when the period information is transmitted in a specific change period, the new system information is transmitted in a change period other than the specific change period.

Preferably, when the period information is transmitted in a specific change period, the new system information is transmitted in the next change period after the specific change period.

The present invention maximizes the efficiency of a radio resource by using a minimum amount of radio resources of a cell under the control of the base station that transmits control information, i.e., system information, required for accessing the base station, and simultaneously receives the control information The system information is effectively received and updated when the system information is changed while minimizing power consumption of the terminal

The present invention is applied to 3GPP communication technology, in particular Universal Mobile Telecommunications System (UMTS) system, communication device and communication method. However, the present invention is not limited thereto and may be applied to all wired / wireless communication to which the technical idea of the present invention can be applied.

A basic concept of the present invention is to provide a method for receiving system information for uplink connection in a wireless communication system for efficiently transmitting and receiving system information, the method comprising: receiving the system information and period information related to a change of the system information Wow; Determining whether the system information needs to be changed or not; If it is determined that the system information is changed, a method of receiving new system information according to the period information is proposed and a wireless mobile communication terminal capable of performing such a method is proposed.

According to another aspect of the present invention, there is provided a method for transmitting system information for uplink access in a wireless communication system, the method comprising: transmitting the system information and period information related to change of the system information; Notifying whether the system information is necessary or unchangeable; If it is determined that the system information is changed, a method of transmitting new system information according to the period information is proposed, and a network or a base station in a wireless mobile communication system capable of performing such a method is proposed.

Hereinafter, configurations and operations of embodiments according to the present invention will be described with reference to the accompanying drawings. 5 is an exemplary diagram illustrating a system information receiving process according to the present invention. As shown in FIG. 5, the BCCH Period is a time interval during which system information (SI) is transmitted. That is, the same system information is transmitted in the same BCCH Period. That is, when system information is to be changed while system information is being transmitted in a specific BCCH Period, it can be changed in the next BCCH Period, and new system information can be transmitted in the next BCCH Period. In FIG. 5, in the BCCH Period 3, the UE is notified that the BCCH has changed. Therefore, in the BCCH Period 3, the UE considers that new system information different from the system information transmitted in the BCCH Period 2 is transmitted. In FIG. 5, in the BCCH Period 4, the UE is notified that the BCCH has not been changed. Therefore, the UE considers that the same system information as that transmitted in the previous BCCH Period (for example, BCCH Period 3) is transmitted in the BCCH Period 4, and does not receive the system information. That is, the BCCH Period is a minimum time interval in which system information can be changed. That is, system information of different information can not be transmitted within one BCCH Period.

FIG. 6 is a diagram illustrating another exemplary system information receiving process according to the present invention. Referring to FIG. As shown in FIG. 6, a period in which a base station instructs to change system information may be different from a period in which transmission of newly changed system information starts. That is, if a system information change is instructed in a certain system information change period, the time at which the new system information is transmitted can be the next system information change period. That is, in the Nth system information change period, the BS informs the MS of the change of the system information, and the BS transmits the changed system information in the next system information change period.

For example, if the UE acquires information indicating a change in system information in a system information change interval, the time at which the UE obtains new system information can be set as a next system information change interval. That is, in the Nth system information change period, if the base station informs the terminal of the change of the system information and the terminal receives the change, the terminal actually receives the system information in the next system information change interval.

The present invention maximizes the efficiency of a radio resource by using a minimum amount of radio resources of a cell under the control of the base station that transmits control information, i.e., system information, required for accessing the base station, and simultaneously receives the control information The system information is efficiently received and updated when the system information is changed by minimizing the power consumption of the terminal. To this end, the present invention proposes that a terminal and a base station operate using information on a cycle related to reception or change of system information, and a period related to reception or change of the system information is a period in which system information can be changed Or the minimum period during which the base station can change the system information. The period associated with receiving or changing the system information may indicate a minimum time after the base station changes the system information and then waits until the next system information change. In addition, the period associated with receiving or changing the system information may indicate a minimum time to wait until the base station changes the system information and transmits new system information when informing the terminal that the system information has not changed. The period associated with receiving or modifying the system information may indicate the maximum period of time that the terminal verifies whether the system information has changed, with respect to the change of the system information. The period associated with receiving or changing the system information may indicate a period in which the UE periodically checks whether the system information is changed or a period in which the system information is periodically received in order to confirm whether the system information is changed or not. Here, the cycle related to receiving or changing the system information may be a period in which the terminal confirms that the system information is not changed compared with the previous time, and then confirms the change of the system information for the maximum time that no longer needs to receive the system information It is also possible to indicate a time interval which is not necessary. Alternatively, the period associated with receiving or changing the system information may indicate a period in which the UE starts receiving new system information after confirming that the system information has been changed compared to the previous time.

The present invention suggests that a terminal and a base station operate using time information related to reception or change of system information, and time information related to reception or change of the system information may include information indicating that the changed system information can be transmitted It may also represent time. In addition, the time information related to the reception or modification of the system information may indicate the time at which the transmission of the first part of the changed system information starts or the time at which the transmission can start. The time information related to receiving or changing the system information may indicate a time when the base station can change the system information or a time when the new system information can be started to be transmitted. The time information related to the reception or change of the system information may indicate a time when the base station can change the system information and then perform the next system information change. In addition, when the system informs the terminal that the system information has not been changed compared with the previous time, the time information related to the reception or change of the system information can be transmitted It can also indicate the time that it is. The time information related to the reception or change of the system information may indicate a time at which the terminal starts checking whether the system information has changed in connection with the change of the system information. The time information related to the reception or change of the system information may be a time limit after the terminal confirms that the system information has not been changed compared with the previous time, And may indicate the time at which the operation for confirming the change of information should be performed. The time information related to the reception or change of the system information may indicate a time at which the terminal starts receiving new system information after confirming that the system information has been changed compared with the previous time. The time information related to reception or modification of the system information may indicate a period of periodically confirming whether the system information is changed or periodically receiving the system information in order to confirm whether the system information is changed or not.

The present invention proposes that a terminal and a base station operate using time interval information related to reception or modification of system information, and time interval information related to reception or change of the system information is repeatedly transmitted It may also represent a time interval. Here, system information of the same contents may be transmitted or system information of other contents may be transmitted in one time period designated by the time interval information related to receiving or changing the system information. The time interval information related to the reception or change of the system information may indicate a next time interval in which the changed system information can be transmitted when the base station attempts to change the system currently being transmitted. The time interval information related to the reception or change of the system information may denote a time unit in which the base station can change the system information or a time interval in which the base station can start transmitting the new system information. Alternatively, it may refer to a time interval during which the base station can change the system information. The time interval information related to the reception or change of the system information may indicate a time interval in which the base station can change the system information and then perform the next system information change. Or, in association with the change of the system information, it may mean a time interval in which the terminal starts checking whether the system information has changed. The time interval information related to the reception or modification of the system information may be a time interval in which the terminal considers that the same system information is to be transmitted after confirming that the system information has not been changed compared with the previous time,

It may refer to a time period during which an operation for confirming whether or not the system information to be changed next time is to be performed. The time interval information related to the reception or change of the system information may be a time interval for periodically confirming whether or not the system information is changed in order to confirm whether or not the terminal has changed the system information, Time interval.

That is, in the present invention, the base station determines a system information change interval and transmits the same system information in the same system information change interval. Therefore, the BS can transmit different system information only in different system information change intervals. That is, the system information change interval is a time interval in which the same system information is transmitted.

The base station informs the terminal of information such as a start point, a period of a section, and a length of a section in relation to a system information change section. Based on this, the terminal can know information about each system information change interval. Therefore, in the present invention, the base station determines a system information change period and informs the system information change period. The UE considers that the same system information is transmitted within the same system information change interval. Accordingly, if the UE confirms that the system information has not been changed in the current system information change period, the system considers that the system information is not changed in comparison with the previous system information and does not read the system information. Also, if it is confirmed that the system information has not been changed in the current system information change period, the terminal checks whether or not the system information has changed in the next system information change period. If it is determined that the system information has changed in this system information change section, the terminal reads the system information. At this time, if the system information needs to be read, the terminal reads the information in the system information change section. Therefore, in the present invention, the base station determines a system information change period and informs the system information change period. The system transmits the same system information within the same system information change interval. Therefore, when the base station determines that it is necessary to change the system information during the transmission of the system information within one system information change period, the base station transmits the already transmitted system information within the current system information change period, And transmits information.

The system information update or change may occur only in a specific radio frame. The change section in the present invention was thus used. The system information message may be transmitted several times with the same contents within the change period. The boundaries of the change section are defined by SFN mod N, where N is configured by the system information. When the network updates or changes the system information in whole or in part, the network first notifies a plurality of terminals (UEs) about such changes. Such notification may be made throughout the change period. In the next change period, the network can transmit updated system information. Upon receiving the change notification, the terminal knows that the current system information is valid up to the next change interval boundary. After the next change interval boundary, the terminal acquires new system information.

Hereinafter, a terminal according to the present invention will be described.

A terminal according to the present invention includes all types of terminals capable of using a service for exchanging data with each other over wireless. That is, the terminal according to the present invention may be a mobile communication terminal (e.g., a UE, a mobile phone, a cellular phone, a DMB phone, a DVB-H phone, a PDA phone, a PTT phone, And laptops, laptop computers, digital TVs, GPS navigation, portable gaming devices, MP3 and other consumer electronics, and the like.

The terminal according to the present invention may include a basic hardware configuration (a transmission / reception unit, a processing unit or a control unit, a storage unit, and the like) required to perform functions and operations for receiving system information as exemplified by the present invention.

The method according to the present invention described so far can be implemented in software, hardware, or a combination thereof. For example, the method according to the present invention can be stored in a storage medium (e.g., a mobile terminal or a base station's internal memory, flash memory, hard disk, etc.) Lt; / RTI > may be implemented as codes or instructions within a software program that may be executed by a processor (e.g., an internal microprocessor).

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the scope of the present invention . Accordingly, the true scope of the present invention should be determined by the technical idea of the appended claims.

1 is a network structure of an E-UTRAN which is a conventional mobile communication system to which the present invention is applied.

2 is an exemplary diagram illustrating a control plane structure of a wireless interface protocol between a terminal and an E-UTRAN in the prior art.

3 is an exemplary diagram illustrating a user plane structure of a wireless interface protocol between a terminal and an E-UTRAN in the prior art.

4 is a diagram illustrating a structure of a physical channel for control channel transmission in the prior art.

FIG. 5 is a first embodiment of a system information receiving process according to the present invention.

FIG. 6 is a second embodiment of a system information receiving process according to the present invention.

Claims (14)

  1. A method for receiving updated system information on a wireless communication system,
    The method comprising: receiving a notification for a change in system information, the notification being received via a paging channel (PCH); And
    Receiving the updated system information within a modification period after receiving the notification,
    The modification period has boundaries defined by a system frame number (SFN)
    The system information change occurs only in the change period, and
    Wherein the updated system information includes being received with the same content within the modification period.
  2. The system according to claim 1, wherein the information on the change period includes at least one of a start point of a change period, a final point of the change period, or a total interval time of the change period. How to receive.
  3. 2. The method of claim 1, wherein the information of the change period indicates a minimum period in which the system information can be changed.
  4. 2. The method of claim 1, wherein the information of the change period indicates a minimum period of time in which the base station can change the system information.
  5. 2. The method of claim 1, wherein the information of the change period indicates a minimum time that the base station should wait for the next new system information after changing the system information.
  6. 2. The method of claim 1, wherein the information on the change period indicates a maximum period for the UE to confirm whether the system information has been changed.
  7. 2. The method of claim 1, wherein the information of the modification period indicates a start time for receiving the system information.
  8. 2. The method of claim 1, wherein when the information of the change period is received in a specific change period, the system information is also received in the specific change period.
  9. 2. The method according to claim 1, wherein, when information on the change period is received in a specific change period, the system information is received in a change period other than the specific change period. .
  10. 2. The method of claim 1, wherein when the information of the change period is received at a specific change period, the system information is received at a next change period after the specific change period. .
  11. The method of claim 1, wherein the change period is a broadcast control channel (BCCH) change period.
  12. 2. The method of claim 1, wherein the notification is received within the current BCCH change period and the updated system information is received within the next BCCH change period.
  13. A method for transmitting updated system information on a wireless communication system,
    The method comprising: transmitting a notification for a change in system information, the notification being transmitted via a paging channel (PCH); And
    Transmitting the updated system information within a modification period after transmitting the notification,
    The modification period has boundaries defined by a system frame number (SFN)
    The system information change occurs only in the change period, and
    Wherein the updated system information includes being transmitted with the same content within the modification period.
  14. A terminal for receiving updated system information on a wireless communication system,
    The method comprising: receiving a notification for a change in system information, the notification being received via a paging channel (PCH); And
    Receiving the updated system information within a modification period after receiving the notification,
    The modification period has boundaries defined by a system frame number (SFN)
    The system information change occurs only in the change period, and
    Wherein the updated system information includes a processor that performs steps that are received with the same content within the modification period.
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PCT/KR2008/003477 WO2008156314A2 (en) 2007-06-20 2008-06-19 Effective system information reception method
MX2009014200A MX2009014200A (en) 2007-06-20 2008-06-19 Effective system information reception method.
CN2008800210233A CN101682418B (en) 2007-06-20 2008-06-19 Effective system information reception method
GB1000406.7A GB2464631B (en) 2007-06-20 2008-06-19 Effective system information reception method
US12/143,607 US8190144B2 (en) 2007-06-20 2008-06-20 Effective system information reception method
EP08011263A EP2007087A3 (en) 2007-06-20 2008-06-20 Effective system information reception method
TW097123135A TWI364938B (en) 2007-06-20 2008-06-20 Effective system information reception method
US13/431,795 US8862162B2 (en) 2007-06-20 2012-03-27 Effective system information reception method

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CN101682418B (en) 2013-07-31

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