WO2011025279A2 - 무선통신 시스템에서 시스템 정보의 갱신방법 - Google Patents
무선통신 시스템에서 시스템 정보의 갱신방법 Download PDFInfo
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- WO2011025279A2 WO2011025279A2 PCT/KR2010/005737 KR2010005737W WO2011025279A2 WO 2011025279 A2 WO2011025279 A2 WO 2011025279A2 KR 2010005737 W KR2010005737 W KR 2010005737W WO 2011025279 A2 WO2011025279 A2 WO 2011025279A2
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/20—Control channels or signalling for resource management
- H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
Definitions
- the present invention relates to wireless communication, and more particularly, to a method of updating system information.
- SI System Information
- SI is information including various information about a wireless environment such as code information and power level used in a current cell or an adjacent cell.
- a terminal When a terminal initially registers with a base station system or moves to a new base station through a handover, it should receive system information of the new base station.
- the terminal can know the state of the base station by using the system information, and can know the access method and procedure when accessing the base station.
- the corresponding terminal When the RRC (Radio Resource Control) layer of a specific terminal and the RRC layer of the base station are connected to send and receive RRC messages with each other, the corresponding terminal is in an RRC connected state, and the terminal is idle when not connected. It is said to be in Idle state.
- the terminal When the terminal is in the dormant state and is switched to the RRC connection state, the terminal attempts to connect according to the access method learned from the system information of the base station.
- the base station may update all or part of the system information as needed. Before applying the updated system information to the system, the base station notifies the terminal of whether the system information is updated first, so that the terminal prepares to receive the updated system information.
- An object of the present invention is to provide a method for reliably updating system information in a wireless communication system.
- a method for updating system information of a base station using a superframe structure in a wireless communication system includes transmitting a primary header containing system scheduling information related to updating of system information, and transmitting an updated secondary header.
- the system scheduling information may include auxiliary header change state information indicating a change state of the updated secondary header, secondary header applying information indicating whether the auxiliary header change state information is currently applied to the system, and Contains a subheader change indicator that indicates an updated subheader.
- a method for updating system information of a terminal using a superframe structure in a wireless communication system may include any one of first auxiliary header change state information indicating a change state of a current auxiliary header, second auxiliary header change state information which is a previous version of the first auxiliary header change state information, and the first auxiliary header change state information.
- the terminal Even if the terminal fails to receive the system information at a specific time point, it is possible to receive the system information at another time point before the updated system information is applied to the actual system, thereby enabling stable communication. And, the terminal can know from which point to apply the updated system information through the auxiliary header application information. There is an effect that the mobile terminal in service can update the system information without degrading the quality of the service.
- FIG. 1 is a block diagram illustrating a wireless communication system.
- FIG. 2 shows an example of a frame structure.
- FIG. 3 is an explanatory diagram illustrating a method of transmitting system scheduling information according to an embodiment of the present invention.
- FIG. 4 is a flowchart illustrating a method of updating system information of a terminal according to an embodiment of the present invention.
- FIG. 5 is a flowchart illustrating a method of updating system information of a base station according to an embodiment of the present invention.
- FIG. 6 is an explanatory diagram illustrating a method of transmitting system scheduling information according to another example of the present invention.
- FIG. 7 is a flowchart illustrating a method of transmitting system information according to an embodiment of the present invention.
- FIG. 8 is a flowchart illustrating a method of updating system information according to an embodiment of the present invention.
- 9 and 10 are flowcharts illustrating a method of updating system information according to another example of the present invention.
- 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.
- 3GPP 3rd Generation Partnership Project
- LTE long term evolution
- E-UMTS Evolved UMTS
- FIG. 1 is a block diagram illustrating a wireless communication system.
- Wireless communication systems are widely deployed to provide various communication services such as voice, packet data, and the like.
- a wireless communication system includes a user equipment (UE) 10 and a base station 20 (BS).
- the terminal 10 may be fixed or mobile and may be called by other terms such as mobile station (MS), advanced mobile station (AMS), user terminal (UT), subscriber station (SS), and wireless device (wireless device).
- the base station 20 generally refers to a fixed station communicating with the terminal 10, and includes an advanced base station (ABS), a node-b (node-b), a base transceiver system (BTS), and an access point ( Access Point) may be called.
- ABS advanced base station
- node-b node-b
- BTS base transceiver system
- Access Point Access Point
- One or more cells may exist in one base station 20.
- downlink means communication from the base station 20 to the terminal
- uplink means communication from the terminal 10 to the base station 20
- the transmitter may be part of the base station 20 and the receiver may be part of the terminal 10.
- the transmitter may be part of the terminal 10 and the receiver may be part of the base station 20.
- FIG. 2 shows an example of a frame structure.
- a superframe includes a superframe header and four frames Frame0 to Frame3.
- the transmission period of control information that does not need to be transmitted frequently can be increased in units of superframes, thereby increasing the efficiency of transmission.
- the allocation and scheduling of data are most frequently performed in units of frames, thereby reducing delay characteristics of data transmission considering the retransmission mechanism.
- One frame includes eight subframes (Subframe, SF0, SF1, SF2, SF3, SF4, SF5, SF6, SF7).
- Each subframe may be used for uplink or downlink transmission.
- the subframe may consist of 6 or 7 OFDM symbols, but this is only an example.
- Time division duplexing (TDD) or frequency division duplexing (FDD) may be applied to the frame.
- TDD Time division duplexing
- FDD frequency division duplexing
- each subframe is used in uplink or downlink at different times at the same frequency. That is, subframes in the TDD frame are divided into an uplink subframe and a downlink subframe in the time domain.
- FDD frequency division duplexing
- each subframe is used as uplink or downlink on a different frequency at the same time. That is, subframes in the FDD frame are divided into an uplink subframe and a downlink subframe in the frequency domain.
- Uplink transmission and downlink transmission occupy different frequency bands and may be simultaneously
- the superframe header may be placed at the front of the superframe, and a common control channel is assigned.
- the common control channel is a channel used for transmitting control information that can be commonly used by all terminals in a cell, such as information on frames constituting a superframe or system information.
- the superframe header includes a primary superframe header (P-SFH) and a secondary superframe header (S-SFH).
- P-SFH primary superframe header
- S-SFH secondary superframe header
- the primary superframe header is included in every superframe and informs whether the auxiliary superframe included in the current superframe is included and the change status information of system information supported by the current superframe.
- Auxiliary superframe header is divided into three types of S-SFH SubPackets (S-SFH SPs) according to their characteristics, and each Auxiliary Superframe Header Subpackets are accessed by a mobile station to a base station. It is used to broadcast the system information to the mobile terminal that it needs to know in order to do so.
- Each auxiliary superframe header subpacket may be transmitted according to a different transmission period according to the nature of the included system information. For example, the auxiliary superframe header subpacket 1 may be transmitted in 2 superframe periods, the auxiliary superframe header subpacket 2 in 3 superframe periods, and the auxiliary superframe header subpacket 3 in 4 superframe periods.
- the primary superframe header (P-SFH) will be referred to as a primary header
- the secondary superframe header (S-SFH) will be abbreviated as a secondary header.
- the main header is included in the first frame of each superframe, and the main header includes system scheduling information as shown in the following table.
- the secondary header change state information (S-SFH Change State Information) is information indicating the change state of the secondary header and may be referred to as an secondary header change count (S-SFH change count).
- the secondary header change state information is information indicating a change state of the currently transmitted secondary header. The change of the state of the secondary header occurs when any parameter constituting the secondary header changes. If the state of the subheader does not change, the subheader change state information does not change. If the subheader state changes, the subheader change state information increases by 1 modulo 16.
- the terminal may determine whether the auxiliary header is changed based on the auxiliary header change state information.
- auxiliary header change state information newly received by the terminal is the same as the auxiliary header change state information previously received, since the auxiliary header is not changed, the auxiliary header according to the newly received auxiliary header change state information There is no need to decode it. If the auxiliary header change state information newly received by the terminal is different from the previously received auxiliary header change state information, since the auxiliary header is changed, the auxiliary header according to the newly received auxiliary header change state information is decoded. .
- the S-SFH Change Indicator is information that indicates what type of secondary header status has changed and may be called an S-SFH SP Change Bitmap. It may be.
- the auxiliary header change indicator is in bitmap format, where each bit indicates a change state of a corresponding particular type of auxiliary header subpacket. For example, for three subheader subpackets, the subheader change indicator is 3 bits, and the 1st, 2nd, and 3rd bits are the first subheader subpacket, the second subheader subpacket, and the third subheader, respectively. Mapped to header subpacket. If either subheader subpacket is changed, the bit corresponding to the changed subheader subpacket is set to '1'. As a result of the change of the subheader subpacket, the state of the subheader has changed, so the subheader change state information is increased by 1.
- the changed auxiliary header may be repeatedly transmitted over at least one superframe.
- the system information update process according to the present invention can be classified into two types. First, the base station informs the terminal of the updated system information, and second, the base station informs the terminal whether the updated system information is actually applied to the system. These two processes can be done independently of one another. For example, the base station may notify the terminal of the new system information several times in advance, and then apply the new system information at an appropriate time. In other words, the terminal does not apply the updated system information immediately, but applies the updated system information based on the information about the application of the updated system information. Since the transmission of the updated system information and the application of the updated system information are separated, the base station should include information on the application of the updated system information in the system scheduling information and transmit it to the terminal. Information about the application of the system information is called secondary header application information (S-SFH Applying Information), it is included in the system scheduling information shown in Table 2.
- S-SFH Applying Information secondary header application information
- the secondary header application information is information that explicitly indicates which secondary header change state information is applied to the secondary header applied to the system in the current superframe, and is called an S-SFH Applying Offset. Can be.
- the auxiliary header application information is 1-bit information indicating whether the auxiliary header change status information of the currently transmitted version is applied to the current system. For example, if the subheader application information indicates 1, the subheader application information indicates that the subheader change state information of the currently transmitted version is not applied to the current system. In this case, the subheader change state information of the previously transmitted and stored version is applied to the current system. That is, the version of the subheader change state information currently transmitted is different from the version of the subheader change state information applied to the actual system. On the other hand, if the auxiliary header application information is 0, the auxiliary header change state information currently transmitted is applied to the actual system. This indicates that the auxiliary system change status information of the currently transmitted version is applied to the current system.
- the subheader application information is the same information as the subheader change state information applied to the current system. That is, the secondary header application information directly informs the version of the secondary header change state information applied to the current system. For example, it is assumed that the auxiliary header change status information currently transmitted is 0x01, and the auxiliary header change status information currently applied to the system is 0x00. In this case, the auxiliary header application information is equal to 0x00, which is the auxiliary header change state information applied to the current system.
- FIG. 3 is an explanatory diagram illustrating a method of transmitting system scheduling information according to an embodiment of the present invention.
- system information update is divided into system information update steps T0 to T1, system information update preparation steps T1 to T2, and system information update completion steps T2 to T3.
- the base station transmits the auxiliary header change state information 1 through the main header of every superframe.
- the base station transmits the first secondary header related to the secondary header change state information 1 at predetermined time intervals.
- the information applied to the current system is auxiliary header change state information 1. That is, the system information currently being transmitted and the system information applied to the current system are the same. Therefore, the auxiliary header application information indicates 0.
- the base station transmits a new secondary header change state information 1 and the second secondary header changed accordingly through the main header of each superframe, the information applied to the system Is still the old secondary header change state information 1. That is, system information currently being transmitted and system information applied to the current system are different. Therefore, the auxiliary header application information indicates one.
- the secondary header application information indicates 1, but the secondary header change state information 1 applied to the current system, but the new secondary header change state information 2 will be applied to the system soon. Therefore, the terminal receives and stores the auxiliary header change state information 2.
- the current base station is transmitting a new secondary header change state information 2 and the second secondary header accordingly, the information applied to the system is also a new secondary header change state information 2 to be. That is, the system information currently being transmitted and the system information applied to the current system are the same. Therefore, the auxiliary header application information indicates 0.
- the terminal may receive and prepare system information to be updated in advance, the terminal may prepare for failure in receiving system information.
- the first subheader and the second subheader are shown to be transmitted every 2 superframes, but this is only an example, and it is assumed that each subheader is transmitted at least once over several superframes. It is not a limit to ideas.
- the main header includes system scheduling information which is a collection of information related to updating of system information.
- the terminal may know whether the system information is updated using the system scheduling information.
- the terminal receives and stores system scheduling information included in the main header (S400).
- the system scheduling information includes subheader change state information, subheader change indicator, and subheader application information.
- the terminal determines whether the previously stored auxiliary header change state information 1 and the newly received auxiliary header change state information 2 are the same by referring to the auxiliary header change state information included in the system scheduling (S405). If the subheader change state information 1 and the subheader change state information 2 are the same, the terminal does not receive the subheader related to the subheader change state information 2 and maintains the system information as the subheader change state information 1 ( S410). This is because when the secondary header change state information 1 and the secondary header change state information 2 are the same, the terminal may continue to perform communication based on system information according to the secondary header related to the existing secondary header change state information 1.
- the terminal determines whether the secondary header associated with the secondary header change state information 2 (S415). Specifically, the subheader related to the subheader change state information 2 is the subheader indicated as changed by the subheader change indicator.
- the terminal receives the auxiliary header related to the auxiliary header change state information 2 (S420), and determines whether the auxiliary header application information is 0 (S420). S425). If the terminal receives the auxiliary header related to the auxiliary header change state information 2, it is immediately determined whether the auxiliary header application information is 0 (S425).
- step S425 if the auxiliary header application information is not 0 and 1, it means that the system information has not been updated yet. Therefore, the terminal maintains the system information as the auxiliary header change state information 1 (S410).
- the terminal updates to the secondary header change state information 2 (S430). After that, the auxiliary header change state information 2 is stored (S435).
- the UE can selectively reduce the decoding burden by selectively receiving new system information through the auxiliary header change state information.
- the terminal can continuously monitor the system information currently applied to the base station through the auxiliary header application information, it is possible to clearly know whether the system information applied to them is up to date or should be updated.
- FIG. 5 is a flowchart illustrating a method of updating system information of a base station according to an embodiment of the present invention.
- the base station determines whether system information is required to be updated (S500). If it is not necessary to update the system information, the base station sets the auxiliary header application information to 0 (S530). If it is necessary to update the system information, the base station sets the auxiliary header application information to 1 (S505). The base station updates the auxiliary header change state information (S510). The update of the auxiliary header change state information means that the auxiliary header change state information is increased by 1 modulo 16.
- the base station transmits the new system scheduling information including the updated subheader change state information, the subheader change indicator updated according to the update of the subheader change state information, and the subheader application information set to 1 (S515). ).
- the new system scheduling information is included in the main header of every superframe and transmitted.
- auxiliary header application information is 1, it can be seen that the auxiliary header change state information currently transmitted and the auxiliary header change state information applied to the actual system are different. Therefore, even if the terminal receives the new system scheduling information, the terminal maintains the system according to the auxiliary header change state information before the update.
- the base station determines whether the auxiliary header application information set to 1 is sufficiently transmitted (S520). For example, when the subheader subpacket 1 is changed, the subheader application information is repeatedly transmitted until the changed subheader subpacket 1 is transmitted twice. In addition, when the auxiliary header subpacket 2 is changed, the auxiliary header application information is repeatedly transmitted until the changed auxiliary header subpacket 2 is transmitted twice. In addition, when the auxiliary header subpacket 3 is changed, the auxiliary header application information is repeatedly transmitted until the changed auxiliary header subpacket 3 is transmitted once.
- the base station updates the system information when the auxiliary header application information and the auxiliary header information set to 1 are sufficiently transmitted (S525). Updating the system information means applying the updated auxiliary header change state information to the system.
- the base station sets the subheader application information to 0 (S530). . Thereafter, the base station repeatedly transmits new system scheduling information including the auxiliary header application information set to 0 and the updated auxiliary header change state information to the terminal (S540).
- FIG. 6 is an explanatory diagram illustrating a method of transmitting system scheduling information according to another example of the present invention.
- each superframe contains only the main header or both the main header and the subheader subpackets.
- each major header includes system scheduling information.
- the system scheduling information includes S-SFH Change State Information, S-SFH Applying Information, and S-SFH Applying Indicator. SFH Change Indicator).
- the table below shows an example of a main header format including the system scheduling information.
- the subheader change state information and the subheader application information are both 0x00 and the subheader change indicator is 0b000.
- the base station wants to update the system information, first, the auxiliary header change state information is updated to 0b01 to notify the change of the new system information.
- the updated subheader change state information is repeatedly transmitted for a predetermined time so that all terminals can successfully receive it.
- the subheader change state information updated to 0x01 is repeatedly transmitted over superframes # 3 to # 7. .
- the base station starts transmitting a new secondary header.
- the subheader change indicator is updated to 0b100 to indicate the new subheader.
- the subheader application information still indicates 0x00, which is the subheader change state information before updating, which is currently applied to the system. This is to apply a new system information after the change of the system information for a sufficient time. As a result, a phenomenon in which the terminal misses updating of system information at a specific time can be minimized.
- the base station updates the system information based on the subheader change indicator 0b001 from superframe # 8, and then updates the subheader application information to 0x01.
- the subheader application information indicates updated subheader change state information.
- the subheader change status information and the subheader application information are equal.
- FIG. 7 is a flowchart illustrating a method of transmitting system information according to an embodiment of the present invention.
- the base station updates system scheduling information (S700).
- the updated system scheduling information includes subheader change state information, subheader application information, and subheader change indicator.
- the secondary header change state information is increased by one the secondary header change state information of the previous version.
- the secondary header change indicator is changed to indicate a new secondary header about the new system information.
- the auxiliary header application information indicates that the auxiliary header change state information transmitted in the current superframe and the auxiliary header change state information applied to the actual system are different from each other, or indicate the auxiliary header change state information itself applied to the actual system.
- the updated system scheduling information is carried in the main header of the superframe.
- the base station transmits the main header to the terminal (S710).
- the base station transmits a new auxiliary header that causes the update of the system scheduling information to the terminal (S720).
- the transmission by the base station to the terminal means that the broadcast or multicast so that all the terminals can receive.
- the main header and the new subheader may be included in one superframe or may be included in different superframes.
- the terminal stores the updated system scheduling information and the new auxiliary header (S730).
- the base station repeatedly transmits the primary header and the new secondary header for a predetermined number of times N and M (S740).
- the terminal may know that system information will be changed in the future from the updated system scheduling information.
- the terminal may determine the update time of system information by comparing the auxiliary header change state information, the auxiliary header application information, and the auxiliary header change indicator. Can be.
- the base station updates system information according to the version of the secondary header change state information (S750). Secondly, the system scheduling information is updated (S760).
- the update is the secondary header application information
- the secondary header application information indicates that the secondary header change status information applied to the actual system is the same as the secondary header change status information currently transmitted, or the secondary header change status information applied to the actual system It is changed to point to itself.
- the main header including the second updated system scheduling information is transmitted to the terminal (S770). The terminal recognizes that the system information is updated from the secondary updated system information, and continues to communicate with the base station by applying the updated system information (S780).
- the terminal Before applying the new system information to the system, broadcast the system scheduling information and the new auxiliary header several times to announce that the updated system information will be updated so that all terminals in the cell can obtain the information. Update Therefore, even if the terminal fails to receive the updated system information at a specific time, it is possible to receive the system information at another time before the updated system information is applied to the actual system, thereby enabling stable communication. And, the terminal can know from which point to apply the updated system information through the auxiliary header application information. There is an effect that the mobile terminal in service can update the system information without degrading the quality of the service.
- FIG. 8 is a flowchart illustrating a method of updating system information according to an embodiment of the present invention. This is a procedure performed from the standpoint of the base station.
- the base station determines whether update of system information is necessary (S800). If it is not necessary to update the system information, the base station does not change the subheader change state information, subheader application information, and subheader change indicator (S810).
- the base station updates the subheader change state information, subheader change indicator, and subheader application information included in the main header according to the changed information (S820).
- the auxiliary header application information is 1 bit and indicates that the auxiliary header change status information currently applied to the system is different from the currently transmitted auxiliary header change status information.
- the auxiliary header application information is the same number of bits as the auxiliary header change state information, and is the same as the auxiliary header change state information applied to the current system.
- the base station transmits the changed secondary header subpackets to the terminal (S830).
- the base station determines whether the system information message has been repeatedly transmitted for a sufficient time (S840). If the system information message is repeatedly transmitted for a sufficient time, the auxiliary header application information included in the main header is updated (S850), and the changed system information is applied to the system (S860).
- the secondary header subpacket is transmitted again (S830).
- the base station can inform the terminal of the update of the system scheduling information and the update of the system information.
- 9 and 10 are flowcharts illustrating a method of updating system information according to another example of the present invention. This is a procedure performed from the viewpoint of the terminal.
- the terminal receives a main header (S900).
- the main header includes system scheduling information, and the system scheduling information includes subheader change state information, subheader application information, and subheader change indicator.
- the terminal determines whether there is a difference between the auxiliary header change state information received in the previous superframe and the auxiliary header change state information received in the current superframe (S901). If the previously stored auxiliary header change status information is the same as the newly received auxiliary header change status information, it is determined that the update of the system information is not necessary and the auxiliary header included in the current superframe is not received (S902).
- the auxiliary header application information is 1 bit. If 1, the secondary header application state information is applied to the current system. If the auxiliary header application information is 0, the newly received auxiliary header change state information is applied to the current system. To indicate.
- the subheader application information has the same number of bits as the subheader change status information and indicates the subheader change status information applied to the current system. In any example, the terminal may know the subheader change state information applied to the current system from the subheader application information.
- the terminal changes the number of bits (first number of bits) changed between the previously received auxiliary header change indicator and the newly received auxiliary header change indicator and the newly received auxiliary header change state information. It is determined whether the number of changed bits (second number of bits) between the change status information is the same (S905).
- the terminal determines to receive new subheader subpackets indicated as changed in the subheader change indicator (S906).
- the terminal determines that the synchronization between the system information managed by the base station and the system information received and managed by the terminal does not match, and determines that all subheader subpackets are received. (S907).
- the terminal determines whether the received subheader subpacket has been previously received (S908).
- the terminal receives subheader subpackets determined to be received (S909).
- the terminal terminates the procedure.
- step S903 if the newly received auxiliary header change state information is applied to the actual system, it means that the system update has been completed. Therefore, the terminal may check the auxiliary header subpackets related to the currently received auxiliary header change state information. It is determined whether the previous reception (S910).
- the terminal stops data communication until system information is updated by the value of the secondary header change indicator (S911).
- the terminal changes the subheader change state information previously received and the newly received subheader change state information by the changed number of bits (third bit number) between the previously received subheader change indicator and the newly received subheader change indicator. It is determined whether the number of bits (fourth bit) changed is equal to the number of times (S912).
- the terminal receives new subheader subpackets indicated as changed in the subheader change indicator and updates system information (S913).
- the terminal stores the secondary header change state information and the secondary header change indicator (S915). Data communication is resumed based on the updated system information (S916).
- step S910 if the terminal has previously received auxiliary header subpackets related to the auxiliary header change state information currently received, the terminal resumes data communication with the updated system information (S916).
- a processor such as a microprocessor, a controller, a microcontroller, an application specific integrated circuit (ASIC), or the like according to software or program code coded to perform the function.
- ASIC application specific integrated circuit
Abstract
Description
Syntax | Size (bit) |
LSB of Superframe Number | 4 |
S-SFH Change Count | 4 |
S-SFH Size | 4 |
S-SFH Transmission Format | 2 |
S-SFH Scheduling Information bitmap | 3 |
S-SFH SP Change Bitmap | 3 |
Reserved | 4 |
Syntax | Size (bit) |
LSB of Superframe Number | 4 |
S-SFH Applying Information | 1 |
S-SFH Change State Information | 4 |
S-SFH Size | 4 |
S-SFH Transmission Format | 2 |
S-SFH Scheduling Information bitmap | 3 |
S-SFH Change Indicator | 3 |
Reserved | 4 |
Syntax | Size (bit) | Notes |
LSB of Superframe Number | 4 | 슈퍼프레임 번호의 부분 |
S-SFH Applying Information | 4 | 현재 슈퍼프레임에 적용된 보조헤더 변경상태정보를 지시 |
S-SFH Change State Information | 4 | 현재 슈퍼프레임에서 전송되는 보조헤더 변경상태정보를 지시 |
S-SFH Size | 4 | LRU의 유닛 |
S-SFH Transmission Format | 2 | 보조헤더를 위해 사용되는 전송포맷을 지시 |
S-SFH Scheduling Information bitmap | 3 | 0b000 : 보조헤더 없음만약 1번째 비트가 1이면, 보조헤더는 SP1을 포함.만약 2번째 비트가 1이면, 보조헤더는 SP2를 포함.만약 3번째 비트가 1이면, 보조헤더는 SP3을 포함. |
S-SFH Change Indicator | 3 | 보조헤더 SPx IE의 변경을 지시. 0번째에서 2번째 비트는 각각 보조헤더 SP1 IE부터 보조헤더 SP3 IE에 맵핑됨. |
Claims (13)
- 무선통신 시스템에서 슈퍼프레임 구조를 이용한 기지국의 시스템 정보 갱신방법에 있어서,시스템 정보의 갱신에 관련된 시스템 스케줄링 정보를 포함하는 주요헤더(primary header)를 전송하는 단계; 및갱신된 보조헤더(secondary header)를 전송하는 단계를 포함하되,상기 시스템 스케줄링 정보는, 상기 갱신된 보조헤더의 변경상태를 나타내는 보조헤더 변경상태정보, 상기 보조헤더 변경상태정보가 현재 시스템에 적용되는 것인지를 지시하는 보조헤더 적용정보(secondary header applying info) 및 상기 갱신된 보조헤더를 지시하는 보조헤더 변경지시자를 포함하는, 시스템 정보의 갱신방법.
- 제 1 항에 있어서,상기 보조헤더 적용정보는 상기 보조헤더 변경상태정보가 상기 현재 시스템에 적용되는 것인지 또는 이전 버전(version)의 보조헤더 변경상태정보가 상기 현재 시스템에 적용되는 것인지를 지시하는, 시스템 정보의 갱신방법.
- 제 1 항에 있어서,상기 보조헤더 적용정보는 상기 현재 시스템에 적용된 보조헤더 변경상태정보와 동일한, 시스템 정보의 갱신방법.
- 제 1 항에 있어서,상기 보조헤더 적용정보는 상기 갱신된 보조헤더의 종류에 따라 적어도 1회 이상 상기 주요헤더를 통해 전송되는, 시스템 정보의 갱신방법.
- 제 4 항에 있어서,상기 보조헤더 적용정보는 상기 적어도 1회 이상 전송된 이후에 그 값이 변경되는, 시스템 정보의 갱신방법.
- 제 4 항에 있어서,상기 갱신된 보조헤더는 적어도 1회 이상 전송되는, 시스템 정보의 갱신방법.
- 제 1 항에 있어서,상기 주요헤더는 상기 슈퍼프레임의 적어도 하나의 OFDM(Orthogonal Frequency Division Multiplexing) 심벌(symbole)을 포함하는, 시스템 정보의 갱신방법.
- 무선통신 시스템에서 슈퍼프레임 구조를 이용한 단말의 시스템 정보 갱신방법에 있어서,현재 보조헤더의 변경상태를 나타내는 제1 보조헤더 변경상태정보, 상기 제1 보조헤더 변경상태정보의 이전 버전인 제2 보조헤더 변경상태 정보 및 상기 제1 보조헤더 변경상태정보 중 어느 하나가 시스템 정보에 현재 적용됨을 지시하는 보조헤더 적용정보를 포함하는 주요헤더를 기지국으로부터 수신하는 단계; 및상기 보조헤더 적용정보가 상기 제1 보조헤더 변경상태정보를 지시하는 경우, 상기 제1 보조헤더 변경상태정보에 기초하여 상기 시스템 정보를 갱신하는 단계를 포함하는 시스템 정보의 갱신방법.
- 제 8 항에 있어서,상기 보조헤더 적용정보가 상기 제2 보조헤더 변경상태정보를 지시하는 경우, 상기 시스템 정보의 갱신없이 상기 기지국과 통신을 수행하는 단계를 더 포함하는, 시스템 정보의 갱신방법.
- 제 8 항에 있어서,상기 보조헤더 적용정보는 상기 현재 보조헤더의 종류에 따라 적어도 1회 이상 상기 주요헤더를 통해 전송되는, 시스템 정보의 갱신방법.
- 제 8 항에 있어서,상기 보조헤더 적용정보는 상기 제1 보조헤더 변경상태정보 또는 상기 제2 보조헤더 변경상태정보 중 어느 하나와 동일한, 시스템 정보의 갱신방법.
- 제 8 항에 있어서,상기 주요헤더는 갱신된 보조헤더를 지시하는 보조헤더 변경지시자를 더 포함하고, 상기 갱신된 보조헤더는 상기 제2 보조헤더 변경상태정보가 상기 제1 보조헤더 변경상태정보로 갱신되는 원인을 제공하는, 시스템 정보의 갱신방법.
- 제 12 항에 있어서,상기 갱신된 보조헤더를 적어도 1회 이상 수신하는 단계를 더 포함하는, 시스템 정보의 갱신방법.
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JP2012526655A JP2013503547A (ja) | 2009-08-28 | 2010-08-26 | 無線通信システムにおけるシステム情報の更新方法 |
US13/392,842 US8837404B2 (en) | 2009-08-28 | 2010-08-26 | Method of updating system information in wireless communication system |
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KR20090080793 | 2009-08-28 | ||
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KR1020100081349A KR101631306B1 (ko) | 2009-08-28 | 2010-08-23 | 무선통신 시스템에서 시스템 정보의 갱신방법 |
KR10-2010-0081349 | 2010-08-23 |
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WO2011025279A2 true WO2011025279A2 (ko) | 2011-03-03 |
WO2011025279A3 WO2011025279A3 (ko) | 2011-06-09 |
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KR20050110644A (ko) * | 2003-04-23 | 2005-11-23 | 닛본 덴끼 가부시끼가이샤 | 이동통신을 위한 시스템 및 방법 |
KR20060078667A (ko) * | 2004-12-30 | 2006-07-05 | 주식회사 케이티 | 휴대인터넷 시스템에서 자원할당 오버헤드를 감소시키기위한 고정적 주파수 자원 할당 방법 |
KR20090029620A (ko) * | 2007-09-18 | 2009-03-23 | 엘지전자 주식회사 | 무선통신 시스템에서 시스템 정보 갱신 방법 |
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KR20050110644A (ko) * | 2003-04-23 | 2005-11-23 | 닛본 덴끼 가부시끼가이샤 | 이동통신을 위한 시스템 및 방법 |
KR20060078667A (ko) * | 2004-12-30 | 2006-07-05 | 주식회사 케이티 | 휴대인터넷 시스템에서 자원할당 오버헤드를 감소시키기위한 고정적 주파수 자원 할당 방법 |
KR20090029620A (ko) * | 2007-09-18 | 2009-03-23 | 엘지전자 주식회사 | 무선통신 시스템에서 시스템 정보 갱신 방법 |
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