WO2016060491A2 - 무선 통신 시스템에서 방송 데이터 지원 방법 및 장치 - Google Patents
무선 통신 시스템에서 방송 데이터 지원 방법 및 장치 Download PDFInfo
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- WO2016060491A2 WO2016060491A2 PCT/KR2015/010887 KR2015010887W WO2016060491A2 WO 2016060491 A2 WO2016060491 A2 WO 2016060491A2 KR 2015010887 W KR2015010887 W KR 2015010887W WO 2016060491 A2 WO2016060491 A2 WO 2016060491A2
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- 238000004891 communication Methods 0.000 title claims abstract description 19
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/0005—Control or signalling for completing the hand-off
- H04W36/0007—Control or signalling for completing the hand-off for multicast or broadcast services, e.g. MBMS
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
- H04B1/40—Circuits
- H04B1/44—Transmit/receive switching
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/0005—Control or signalling for completing the hand-off
- H04W36/0083—Determination of parameters used for hand-off, e.g. generation or modification of neighbour cell lists
- H04W36/00835—Determination of neighbour cell lists
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/04—Reselecting a cell layer in multi-layered cells
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
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- H04W36/00—Hand-off or reselection arrangements
- H04W36/24—Reselection being triggered by specific parameters
- H04W36/30—Reselection being triggered by specific parameters by measured or perceived connection quality data
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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
- H04W48/10—Access restriction or access information delivery, e.g. discovery data delivery using broadcasted information
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/02—Details
- H04L12/16—Arrangements for providing special services to substations
- H04L12/18—Arrangements for providing special services to substations for broadcast or conference, e.g. multicast
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/06—Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services
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- H—ELECTRICITY
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- 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
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- H04W88/08—Access point devices
Definitions
- the present invention relates to a wireless communication system, and more particularly, to a method and apparatus for providing multimedia broadcast multicast service (MBMS) data in a long term evolution (LTE) system.
- MBMS multimedia broadcast multicast service
- LTE long term evolution
- mobile communication systems have been developed to provide voice services while guaranteeing user activity.
- mobile communication systems are gradually expanding to not only voice but also data services, and now they have developed to the extent that they can provide high-speed data services.
- a shortage of resources and users demand faster services, and thus, a more advanced mobile communication system is required.
- LTE Long Term Evolution
- 3GPP The 3rd Generation Partnership Project
- LTE is a technology that implements high-speed packet-based communication with a transmission rate of up to 100 Mbps.
- various methods are discussed.
- the network structure can be simplified to reduce the number of nodes located on the communication path, or the wireless protocols can be as close to the wireless channel as possible.
- the data service unlike the voice service, is determined according to the amount of data to be transmitted and the channel conditions and resources that can be allocated. Therefore, in a wireless communication system such as a mobile communication system, management such as allocating transmission resources is performed in consideration of the amount of resources to be transmitted by the scheduler, the situation of the channel and the amount of data. This is the same in LTE, one of the next generation mobile communication systems, and a scheduler located in a base station manages and allocates radio transmission resources.
- LTE-Advanced LTE-Advanced
- LTE-A Long Term Evolution-Advanced
- MBMS Multimedia Broadcast Multicast Service
- MBMS is a broadcast service provided through an LTE system.
- the operator should optimize the service area not only for unicast communication but also for MBMS service, and in particular, discuss how to provide MBMS service continuously to the UE when the UE performs inter-cell movement. Is needed.
- the present invention is derived from the above-described demands, and an object thereof is to provide a method and apparatus for continuously providing Multimedia Broadcast Multicast Service (MBMS) data in a Long Term Evolution (LTE) system.
- MBMS Multimedia Broadcast Multicast Service
- an object of the present invention is to provide a method and apparatus for preventing cell reselection from occurring frequently when a terminal receiving MBMS data moves between cells.
- a method of transmitting information of a base station includes a system information block including first hysteresis information for a first type terminal and second hysteresis information for a second type terminal. Generating, and broadcasting the generated system information block.
- a method of performing cell reselection of a terminal includes: receiving a system information block from a base station, determining whether to receive multimedia broadcast multicast service (MBMS) data, and the system information block; And performing cell reselection based on the determination result.
- MBMS multimedia broadcast multicast service
- the base station for transmitting information in the wireless communication system of the present invention is a system information block including a transceiver for transmitting and receiving a signal, and the first hysteresis information for the first type terminal and the second hysteresis information for the second type terminal. And a control unit for controlling to broadcast the generated system information block.
- a terminal performing cell reselection receives a transceiver for transmitting and receiving a signal to and from a base station, and receives a system information block from the base station, and determines whether to receive MBMS (Multimedia Broadcast Multicast Service) data. And a control unit controlling to perform cell reselection based on the system information block and the determination result.
- MBMS Multimedia Broadcast Multicast Service
- the cell reselection does not occur frequently so that the terminal can continuously receive the MBMS data continuously.
- FIG. 1 is a diagram illustrating a conceptual diagram of MBMS.
- FIG. 2 is a diagram illustrating a downlink channel mapping relationship used for MBSFN transmission.
- FIG. 3 is a diagram illustrating a structure of a downlink frame used in an LTE system.
- FIG. 4 is a flowchart illustrating a procedure for receiving an MBSFN by a terminal.
- FIG. 5 is a diagram illustrating a problem that may occur when a terminal moves between cells.
- FIG. 6 is a flowchart illustrating an operation sequence of a base station according to the second embodiment of the present invention.
- FIG. 7 is a flowchart illustrating an operation sequence of a terminal according to the second embodiment of the present invention.
- FIG. 8 is a flowchart illustrating an operation sequence of a terminal according to the third embodiment of the present invention.
- FIG. 9 is a block diagram showing the internal structure of a base station according to an embodiment of the present invention.
- FIG. 10 is a block diagram showing the internal structure of a terminal according to an embodiment of the present invention.
- each block of the flowchart illustrations and combinations of flowchart illustrations may be performed by computer program instructions. Since these computer program instructions may be mounted on a processor of a general purpose computer, special purpose computer, or other programmable data processing equipment, those instructions executed through the processor of the computer or other programmable data processing equipment may be described in flow chart block (s). It creates a means to perform the functions. These computer program instructions may be stored in a computer usable or computer readable memory that can be directed to a computer or other programmable data processing equipment to implement functionality in a particular manner, and thus the computer usable or computer readable memory. It is also possible for the instructions stored in to produce an article of manufacture containing instruction means for performing the functions described in the flowchart block (s).
- Computer program instructions may also be mounted on a computer or other programmable data processing equipment, such that a series of operating steps may be performed on the computer or other programmable data processing equipment to create a computer-implemented process to create a computer or other programmable data. Instructions for performing the processing equipment may also provide steps for performing the functions described in the flowchart block (s).
- each block may represent a portion of a module, segment, or code that includes one or more executable instructions for executing a specified logical function (s).
- logical function e.g., a module, segment, or code that includes one or more executable instructions for executing a specified logical function (s).
- the functions noted in the blocks may occur out of order.
- the two blocks shown in succession may in fact be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending on the corresponding function.
- ' ⁇ part' used in the present embodiment refers to software or a hardware component such as an FPGA or an ASIC, and ' ⁇ part' performs certain roles.
- ' ⁇ ' is not meant to be limited to software or hardware.
- ' ⁇ Portion' may be configured to be in an addressable storage medium or may be configured to play one or more processors.
- ' ⁇ ' means components such as software components, object-oriented software components, class components, and task components, and processes, functions, properties, procedures, and the like. Subroutines, segments of program code, drivers, firmware, microcode, circuits, data, databases, data structures, tables, arrays, and variables.
- the functionality provided within the components and the 'parts' may be combined into a smaller number of components and the 'parts' or further separated into additional components and the 'parts'.
- the components and ' ⁇ ' may be implemented to play one or more CPUs in the device or secure multimedia card.
- FIG. 1 is a diagram illustrating a conceptual diagram of MBMS.
- the MBMS service area 100 is a network area composed of a plurality of base stations capable of performing Multimedia Broadcast multicast service Single Frequency Network (MBSFN) transmission.
- MBSFN Multimedia Broadcast multicast service Single Frequency Network
- MBSFN Area 105 (or broadcast area information, which may be used interchangeably) is a network area composed of multiple cells integrated for MBSFN transmission, and all cells in the MBSFN area are all MBSFN transmissions. Is synchronized.
- MBSFN Area Reserved Cells are used for MBSFN transmission.
- the MBSFN area reserved cell 110 is a cell that is not used for MBSFN transmission, and may be transmitted for other purposes, but limited transmission power may be allowed for a radio resource allocated for MBSFN transmission.
- FIG. 2 is a diagram illustrating a downlink channel mapping relationship used for MBSFN transmission.
- the MCH 200 is used between the MAC layer and the physical layer, and the MCH is mapped to the PMCH 205 of the physical layer.
- the unicast scheme of transmitting data only to a specific terminal generally uses a PDSCH (Physical Downlink Shared Channel, 210).
- PDSCH Physical Downlink Shared Channel
- FIG. 3 is a diagram illustrating a structure of a downlink frame used in an LTE system.
- any radio frame 300 consists of ten subframes 305.
- each subframe is a 'general subframe 310' used for general data transmission and reception and a 'MBSFN (Multimedia Broadcast multicast service Single Frequency Network)' (MBSFN) subframe 315 used for broadcasts.
- MSSFN Multimedia Broadcast multicast service Single Frequency Network
- the difference between the normal subframe and the MBSFN subframe includes the number of Orthogonal Frequency Division Multiplexing (OFDM) symbols, the length of the cyclic prefix, and the cell-specific reference signals (CRS). There is a difference in structure and number.
- OFDM Orthogonal Frequency Division Multiplexing
- CRS cell-specific reference signals
- MBSFN subframes in Rel-8 and Rel-9 systems have been used only for the purpose of transmitting broadcast or multicast data.
- MBSFN subframes can be used not only for broadcast or multicast but also for unicast purposes.
- each UE in order to efficiently use a physical downlink shared channel (hereinafter referred to as a PDSCH), each UE is connected to a multi-antenna technology and a transmission mode associated with a reference signal (RS). Set by TM).
- RS reference signal
- LTE Rel-10 exists from TM1 to TM9. Each UE has one TM for PDSCH transmission, TM 8 is newly defined in Rel-9, TM 9 is newly defined in Rel-10.
- TM 9 supports single user-multi-input multi-output (SU-MIMO) having up to eight ranks.
- TM 9 supports the transmission of multiple layers, and enables up to eight layers to be transmitted by using a Rel-10 Demodulation Reference Signal (DMRS), hereinafter referred to as DMRS, during demodulation.
- DMRS Demodulation Reference Signal
- the pre-coded DMRS is transmitted in the Rel-10 DMRS, but it is not necessary to inform the receiving end of the corresponding precoder index.
- DCI Downlink Control Information format 2C is newly defined in Rel-10. Note that UEs before Rel-10 do not attempt decoding in the MBSFN subframe. Therefore, having all terminals try to decode in the MBSFN subframe leads to an upgrade request of the terminal of the previous release.
- TM 9 is a transmission mode that maximizes transmission efficiency by using multiple antennas.
- the base station sets TM 9 to a terminal that needs to increase data throughput by receiving unicast data even in the MBSFN subframe, and allows only the terminal having TM 9 set to receive unicast data in the MBSFN subframe. .
- the LTE system informs the PDCCH where data transmission and reception actually occurs, and transmits actual data in the PDSCH.
- the terminal should determine whether there is resource allocation information allocated to the terminal on the PDCCH before receiving the actual data.
- MBSFN obtains resource allocation information through a more complicated process.
- the base station informs the terminal of the transmission position of the multicast control channel (MCCH) for each MBSFN area provided by the cell through SIB13 (System Information Block 13), which is broadcast information.
- the MCCH includes resource allocation information for the MBSFN, and the UE can decode the MCCH to determine the transmission position of the MBSFN subframe.
- the reason why the MBMS provides resource allocation information in a manner different from the conventional unicast is that the MBMS should be available to the UE in the standby mode. Therefore, the transmission position of the control channel MCCH is informed to the broadcast information SIB13.
- the overall process of receiving the MBMS service will be described with reference to FIG. 4.
- FIG. 4 is a flowchart illustrating a process for the UE to receive MBSFN.
- step 405 the terminal 400 receives SIB1 from the base station 403.
- the SIB1 includes scheduling information for other SIBs. Therefore, in order to receive another SIB, SIB1 must be received in advance.
- the terminal 400 receives the SIB2 from the base station 403.
- the MBSFN subframe configuration list (MBSFN-SubframeConfigList IE) of SIB2 indicates subframes that can be used for MBSFN transmission purposes.
- MBSFN-SubframeConfigList IE includes MBSFN-SubframeConfig IE, and indicates which subframe of which radio frame can be the MBSFN subframe.
- Table 1 below is a configuration table of MBSFN-SubframeConfig IE.
- radioFrameAllocationPeriod a radio frame allocation period
- radioFrameAllocationOffset a radio frame allocation offset
- SFN is a system frame number and indicates a radio frame number.
- the SFN ranges from 0 to 1023 and is repeated.
- SubframeAllocation indicates which subframe is the MBSFN subframe in the radio frame indicated by the above equation.
- the MBSFN subframe may exist among 1, 2, 3, 6, 7, and 8th subframes among a total of 10 subframes in one radio frame.
- the oneFrame IE indicates MBSFN subframes among the subframes listed above using 6 bits.
- the MBSFN subframe is indicated among the subframes listed above for each radio frame. Therefore, the UE can know the subframe that can be exactly MBSFN subframe using the MBSFN-SubframeConfigList IE.
- the terminal 400 receives SIB13 from the base station 405 in step 415.
- the MBSFN area information list (MBSFN-AreaInfoList IE) of SIB13 includes location information through which the MCCH for each MBSFN area provided by the cell is transmitted. Using this information, the UE receives the MCCH in step 420.
- Table 2 below shows the MBSFN-AreaInfoList IE.
- MBDFN-AreaInfoList IE includes MCCH scheduling information of all MBSFN areas.
- MBSFN-AreaInfo IE includes MCCH scheduling and other information.
- Mbsfn-AreaId is an MBSFN area ID.
- Non-MBSFNregionLength represents the number of symbols corresponding to the non-MBSFN region among symbols in the MBFSN subframe. The symbol is located at the front of the subframe.
- the notificationIndicator is used to indicate a PDCCH bit informing the UE of the change of MCCH information.
- Mcch-Config IE contains MCCH scheduling information.
- Mcch-RepetitionPeriod and mcch-Offset are used to indicate the position of the frame containing the MCCH.
- Mcch-ModificationPeriod is a transmission period of the MCCH
- sf-AllocInfo indicates the position of the subframe including the MCCH in the frame including the MCCH.
- Signaling MCS represents a Modulation and Coding Scheme (MCS) applied to a subframe indicated by sf-AllocInfo and (P) MCH.
- the MBSFNAreaConfiguration IE of the MCCH indicates the location of a resource used for MBSFN transmission, and the UE receives the MBSFN subframe in step 425 using this information.
- commonSF-Alloc represents a subframe allocated to the MBSFN area.
- commonSF-AllocPeriod is a period in which subframes indicated by the commonSF-Alloc repeat.
- the Pmch-InfoList IE includes all PMCH configuration information of one MBSFN area.
- step 430 the UE acquires the location of the MBSFN subframe in which the desired MTCH is transmitted in MCH scheduling information MAC CE, which is one of MAC CE (Control Element) of the received MAC PDU.
- the terminal decodes the desired MTCH in step 435 by using MCH scheduling information.
- FIG. 5 is a diagram illustrating a problem that may occur when a terminal moves between cells.
- the UE 500 receiving the MBMS service receives the MBSFN area information (or broadcast area information) included in the SIB 13 message defined in the standard before cell change. Failure to decode the data and buffering may occur. That is, when the terminal moves to another cell, the terminal may receive a SIB 13 message, and there may be a delay in playing the video until it determines whether the broadcast region information of the moved cell is the same as the broadcast region information of the cell before the movement.
- the present invention has been made to solve the above problems, and provides a method and apparatus for minimizing a delay in decoding broadcast data when a terminal performs cell-to-cell movement.
- the present invention relates to a terminal that does not receive MBMS data for a terminal that receives MBMS data so that cell reselection does not occur frequently when the terminal that receives MBMS data moves to another cell in an idle state.
- a method of applying different cell reselection setting values is described.
- the present invention discloses a method in which a terminal receiving MBMS data adjusts a cell reselection setting value by itself so that cell reselection does not frequently occur when moving between cells.
- the base station may adjust the hysteresis information and offset information used to reduce the ping-pong phenomenon among the parameters used by the terminal to perform cell reselection.
- the hysteresis information may be a Q-Hyst parameter broadcast through a System Information Block (SIB) 3.
- SIB System Information Block
- the offset information may be a q-OffsetCell parameter broadcast through SIB 4.
- the base station may reduce the number of cell reselection of the terminal by adjusting the parameter values so that the terminal stays as long as possible in the serving cell.
- the number of cell reselection of the terminal is reduced, thereby alleviating the buffering problem.
- the base station subdivides hysteresis information broadcasted through SIB 3 into first hysteresis information for the first type terminal and second hysteresis information for the second type terminal.
- the first type terminal includes a terminal that does not receive MBMS data
- the first hysteresis information is a parameter used when a terminal that does not receive MBMS data performs cell reselection in an idle state.
- the second type terminal includes a terminal receiving MBMS data, and the second hysteresis information is a parameter used when the terminal receiving MBMS data performs cell reselection in an idle state.
- the UE monitors whether there is a neighboring cell having a greater reception signal strength than the current serving cell, and if there is a neighboring cell having a larger reception signal strength, the terminal reselects the cell as a serving cell. This is called cell reselection.
- the terminal measures a ranking score for the serving cell and the at least one subscribing cell through the following equation.
- Rn Qmeas, n-Qoffset, s, n
- the hysteresis parameter is taken into account in order to prevent the ping-pong phenomenon from occurring due to an incorrect cell reselection of the terminal.
- the terminal performs cell reselection to the neighboring cell only when a neighboring cell having a large received signal strength is found to exceed the result of adding the hysteresis parameter value to the measurement result from the serving cell.
- the offset parameter is taken into consideration, which is also to prevent the ping-pong phenomenon due to the wrong re-selection of the terminal.
- the hysteresis information is divided into first hysteresis information for a terminal receiving MBMS data and second hysteresis information for a terminal not receiving MBMS data.
- the terminal performs cell reselection based on different hysteresis information according to whether the MBMS data is received.
- the terminal receiving the MBMS data may perform cell reselection based on second hysteresis information having a relatively larger value, thereby reducing the number of times cell reselection occurs.
- the contents of the SIB 3 broadcast by the base station may be changed as shown in Table 4 below.
- FIG. 6 is a flowchart showing an operation procedure of a base station according to the second embodiment of the present invention.
- the base station may generate first hysteresis information for the first type terminal.
- the first type terminal may include a terminal that does not receive MBMS data.
- the base station may generate second hysteresis information for the second type terminal.
- the second type terminal may include a terminal for receiving MBMS data.
- the value according to the second hysteresis information may be a value larger than the set reference than the value according to the first hysteresis information.
- the base station may generate an SIB including the first hysteresis information and the second hysteresis information.
- the SIB may include SIB 3.
- the base station may broadcast the generated SIB.
- FIG. 7 is a flowchart illustrating an operation sequence of a terminal according to the second embodiment of the present invention.
- the terminal determines whether or not received the SIB from the base station.
- the SIB may include SIB 3.
- step S720 the terminal determines whether it is currently receiving MBMS data.
- the terminal proceeds to step S730 and extracts first hysteresis information from the received SIB.
- the terminal proceeds to step S740 to perform a cell reselection procedure based on the extracted first hysteresis information.
- the terminal may perform the cell reselection procedure in the idle state.
- step S750 the terminal proceeds to step S750 to extract the second hysteresis information from the received SIB.
- step S760 the terminal performs a cell reselection procedure based on the extracted second hysteresis information.
- the terminal is a terminal capable of receiving MBMS data, and in the process of performing a cell reselection procedure according to different hysteresis information based on whether the MBMS data is being received at the time of receiving the SIB. It was described.
- embodiments of the present invention should not always be practiced through the above prerequisites. For example, it should be noted that even in a terminal that cannot receive MBMS data, the same operation as that of a terminal not receiving MBMS data can be performed.
- the terminal receiving the MBMS data performs cell reselection, in addition to the hysteresis information included in the SIB 3 broadcast from the base station, the terminal uses separate offset information. Make a selection.
- the ranking score for the serving cell is Will be higher.
- the terminal receives the MBMS data, it is possible to reduce the frequency of the cell reselection.
- FIG. 8 is a flowchart illustrating an operation sequence of a terminal according to the third embodiment of the present invention.
- the terminal may receive the SIB from the base station.
- the SIB may be SIB 3.
- the terminal may receive a master information block (PBCH) through a broadcast channel (PBCH) to obtain scheduling information of the SIB. Accordingly, the terminal can receive the SIB.
- PBCH master information block
- PBCH broadcast channel
- the terminal may identify a cell reselection related parameter in the received SIB 3.
- the cell reselection related parameter may include hysteresis information Qhyst.
- the terminal may enter an idle state at a specific time. If there is a need to perform a cell reselection procedure, the UE determines whether it is receiving MBMS data in step S830.
- the terminal proceeds to step S840, it may perform a cell reselection procedure based on the parameter identified in the SIB, for example, hysteresis information.
- the terminal may proceed to step S850 to check the offset information.
- the offset information may be a specific value preset in the terminal.
- the base station may be delivered to the terminal through a separate signaling or physical channel.
- the UE may perform a cell reselection procedure on the basis of the hysteresis information and the offset information identified in the SIB.
- the base station of the present invention may include a transceiver 910 and a controller 920.
- the transceiver 910 may provide a means for transmitting and receiving a signal with a core node of a terminal or a wireless communication system. For example, when the base station transmits and receives a signal with the terminal, the transceiver 910 forms a wireless channel between the base station and the terminal to transmit and receive the signal. On the other hand, when the base station transmits and receives a signal with the core node, the transceiver 910 provides a wired interface to transmit and receive a signal.
- the controller 920 may control a signal flow between blocks so that the base station can perform an operation according to an embodiment of the present invention.
- the controller 920 may further include a system information block (SIB) manager 921.
- SIB system information block
- the SIB management unit 921 may generate a system information block including first hysteresis information for the first type terminal and second hysteresis information for the second type terminal.
- the SIB management unit 9210 may control to broadcast the generated system information block.
- the first type terminal may include a terminal that is not receiving multimedia broadcast multicast service (MBMS) data
- the second type terminal may include a terminal that is receiving MBMS data
- the system information block may include a system information block (SIB) 3.
- the first hysteresis information and the second hysteresis information may be used by the first type terminal or the second type terminal to perform cell reselection.
- controller 920 and the SIB management unit 921 are divided into separate blocks and described as performing different functions, the present invention is not limited thereto.
- control unit 920 may directly perform a function performed by the SIB management unit 921.
- the terminal of the present invention may include a transceiver 1010, a storage unit, and a controller 1030.
- the transceiver 1010 forms a wireless channel with the base station, and transmits and receives a signal. According to an embodiment of the present invention, the transceiver 1010 may receive a system information block transmitted from the base station, and transmit it to the controller 1030.
- the storage unit 1020 may store software, a program, and the like necessary for the terminal to operate. According to an embodiment of the present invention, the storage unit 1020 may store offset information necessary for the terminal to perform cell reselection.
- the controller 1030 may control a signal flow between blocks so that the terminal may perform an operation according to an embodiment of the present invention. According to an embodiment of the present invention, the controller 1030 may further include a cell reselection execution unit 1031.
- the cell reselection execution unit 1031 may receive a system information block from a base station and determine whether MBMS (Multimedia Broadcast Multicast Service) data is being received. The cell reselection execution unit 1031 may control to perform cell reselection based on the system information block and the determination result.
- MBMS Multimedia Broadcast Multicast Service
- the cell reselection execution unit 1031 may perform the cell reselection based on the first hysteresis information for the first type included in the system information block when the terminal is not receiving the MBMS data. Can be controlled. Alternatively, when the terminal is not receiving the MBMS data, the cell reselection execution unit 1031 controls to perform the cell reselection based on the second hysteresis information for the second type included in the system information block. can do.
- the cell reselection execution unit 1031 checks preset offset information when the terminal is not receiving the MBMS data, and checks the hysteresis information included in the system information block. The cell reselection may be performed based on the offset information.
- the system information block may include a system information block (SIB) 3.
- SIB system information block
- the cell reselection does not occur frequently so that the terminal may continuously receive the MBMS data.
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- Computer Networks & Wireless Communication (AREA)
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Abstract
Description
Claims (18)
- 무선 통신 시스템에서 기지국의 정보 전송 방법에 있어서,제1 타입 단말에 대한 제1 히스테리시스 정보와, 제2 타입 단말에 대한 제2 히스테리시스 정보를 포함하는 시스템 정보 블록을 생성하는 단계; 및상기 생성된 시스템 정보 블록을 방송하는 단계를 포함하는 것을 특징으로 하는 기지국의 정보 전송 방법.
- 제1항에 있어서,상기 제1 타입 단말은 MBMS (Multimedia Broadcast Multicast Service) 데이터를 수신하고 있지 않은 단말을 포함하며,상기 제2 타입 단말은 MBMS 데이터를 수신 중인 단말을 포함하는 것을 특징으로 하는 기지국의 정보 전송 방법.
- 제1항에 있어서,상기 시스템 정보 블록은 SIB(System Information Block) 3을 포함하는 것을 특징으로 하는 기지국의 정보 전송 방법.
- 제1항에 있어서,상기 제1 히스테리시스 정보와, 상기 제2 히스테리시스 정보는 상기 제1 타입 단말 또는 상기 제2 타입 단말이 셀 리셀렉션을 수행하는데 이용되는 것을 특징으로 하는 기지국의 정보 전송 방법.
- 무선 통신 시스템에서 단말의 셀 리셀렉션 수행 방법에 있어서,기지국으로부터 시스템 정보 블록을 수신하는 단계;MBMS (Multimedia Broadcast Multicast Service) 데이터를 수신 중인지 여부를 판단하는 단계; 및상기 시스템 정보 블록과, 상기 판단 결과에 기반하여 셀 리셀렉션을 수행하는 단계를 포함하는 것을 특징으로 하는 단말의 셀 리셀렉션 수행 방법.
- 제5항에 있어서, 상기 수행 단계는,상기 단말이 상기 MBMS 데이터를 수신 중이 아닌 경우, 상기 시스템 정보 블록에 포함된 제1 타입을 위한 제1 히스테리시스 정보에 기반하여 상기 셀 리셀렉션을 수행하는 것을 특징으로 하는 단말의 셀 리셀렉션 수행 방법.
- 제5항에 있어서, 상기 수행 단계는,상기 단말이 상기 MBMS 데이터를 수신 중이 아닌 경우, 상기 시스템 정보 블록에 포함된 제2 타입을 위한 제2 히스테리시스 정보에 기반하여 상기 셀 리셀렉션을 수행하는 것을 특징으로 하는 단말의 셀 리셀렉션 수행 방법.
- 제5항에 있어서,상기 시스템 정보 블록은 SIB(System Information Block) 3을 포함하는 것을 특징으로 하는 단말의 셀 리셀렉션 수행 방법.
- 제5항에 있어서, 상기 수행 단계는,상기 단말이 상기 MBMS 데이터를 수신 중이 아닌 경우, 미리 설정된 오프셋 정보를 확인하는 단계; 및상기 시스템 정보 블록에 포함된 히스테리시스 정보와 상기 오프셋 정보에 기반하여 상기 셀 리셀렉션을 수행하는 단계를 더 포함하는 것을 특징으로 하는 단말의 셀 리셀렉션 수행 방법.
- 무선 통신 시스템에서 정보를 전송하는 기지국에 있어서,신호를 송수신하는 송수신부; 및제1 타입 단말에 대한 제1 히스테리시스 정보와 제2 타입 단말에 대한 제2 히스테리시스 정보를 포함하는 시스템 정보 블록을 생성하고, 상기 생성된 시스템 정보 블록을 방송하도록 제어하는 제어부를 포함하는 것을 특징으로 하는 기지국.
- 제10항에 있어서,상기 제1 타입 단말은 MBMS (Multimedia Broadcast Multicast Service) 데이터를 수신하고 있지 않은 단말을 포함하며,상기 제2 타입 단말은 MBMS 데이터를 수신 중인 단말을 포함하는 것을 특징으로 하는 기지국.
- 제10항에 있어서,상기 시스템 정보 블록은 SIB(System Information Block) 3을 포함하는 것을 특징으로 하는 기지국.
- 제10항에 있어서,상기 제1 히스테리시스 정보와, 상기 제2 히스테리시스 정보는 상기 제1 타입 단말 또는 상기 제2 타입 단말이 셀 리셀렉션을 수행하는데 이용되는 것을 특징으로 하는 기지국
- 무선 통신 시스템에서 셀 리셀렉션을 수행하는 단말에 있어서,기지국과 신호를 송수신하는 송수신부; 및기지국으로부터 시스템 정보 블록을 수신하고, MBMS (Multimedia Broadcast Multicast Service) 데이터를 수신 중인지 여부를 판단하며, 상기 시스템 정보 블록과 상기 판단 결과에 기반하여 셀 리셀렉션을 수행하도록 제어하는 제어부를 포함하는 것을 특징으로 하는 단말.
- 제14항에 있어서, 상기 제어부는,상기 단말이 상기 MBMS 데이터를 수신 중이 아닌 경우, 상기 시스템 정보 블록에 포함된 제1 타입을 위한 제1 히스테리시스 정보에 기반하여 상기 셀 리셀렉션을 수행하도록 제어하는 것을 특징으로 하는 단말.
- 제14항에 있어서, 상기 제어부는,상기 단말이 상기 MBMS 데이터를 수신 중이 아닌 경우, 상기 시스템 정보 블록에 포함된 제2 타입을 위한 제2 히스테리시스 정보에 기반하여 상기 셀 리셀렉션을 수행하도록 제어하는 것을 특징으로 하는 단말.
- 제14항에 있어서,상기 시스템 정보 블록은 SIB(System Information Block) 3을 포함하는 것을 특징으로 하는 단말.
- 제14항에 있어서, 상기 제어부는,상기 단말이 상기 MBMS 데이터를 수신 중이 아닌 경우 미리 설정된 오프셋 정보를 확인하고, 상기 시스템 정보 블록에 포함된 히스테리시스 정보와 상기 오프셋 정보에 기반하여 상기 셀 리셀렉션을 수행하도록 제어하는 것을 특징으로 하는 단말.
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JP2017520435A JP6887376B2 (ja) | 2014-10-15 | 2015-10-15 | 無線通信システムにおける放送データ支援方法及び装置 |
EP15850469.6A EP3209059B1 (en) | 2014-10-15 | 2015-10-15 | Method and apparatus for supporting broadcast data in wireless communication system |
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KR100606014B1 (ko) * | 2003-04-09 | 2006-07-26 | 삼성전자주식회사 | 멀티미디어 브로드캐스트/멀티캐스트 서비스를 지원하는 이동통신 시스템에서 사용자 단말의 셀 재선택 방법 |
KR100880999B1 (ko) * | 2003-08-07 | 2009-02-03 | 삼성전자주식회사 | 멀티미디어 브로드캐스트/멀티캐스트 서비스를 송수신하는 방법 |
WO2005020474A1 (en) * | 2003-08-22 | 2005-03-03 | Samsung Electronics Co., Ltd. | Cell reselection method for receiving packet data in a mobile communication system supporting mbms |
GB2416269A (en) * | 2004-04-16 | 2006-01-18 | Nokia Corp | Cell selection and re-selection |
CA2513782C (en) * | 2004-07-27 | 2009-10-06 | Samsung Electronics Co., Ltd. | Method and apparatus for selecting frequency layer for connected mode ue in an mbms mobile communication system |
KR101128231B1 (ko) * | 2004-08-19 | 2012-03-26 | 엘지전자 주식회사 | 방송 및 멀티캐스트(mbms) 서비스를 위한 단말 분포 제어방법 |
MX2009009802A (es) * | 2007-03-13 | 2009-11-18 | Interdigital Tech Corp | Proceso de reseleccion de celda para comunicaciones inalambricas. |
KR101090542B1 (ko) * | 2007-04-26 | 2011-12-08 | 인터디지탈 테크날러지 코포레이션 | Lte 시스템의 mbms 전용 셀에서의 측정 메카니즘 및 효율적인 페이징 및 브로드캐스팅 방식 구현의 방법 및 장치 |
CA2685687C (en) * | 2007-04-30 | 2017-10-03 | Interdigital Technology Corporation | Cell reselection and handover with multimedia broadcast/multicast service |
CN101370226B (zh) * | 2007-08-17 | 2012-08-08 | 华为技术有限公司 | 小区测量和读取控制信道的方法和用户设备 |
JP4964081B2 (ja) * | 2007-10-01 | 2012-06-27 | パナソニック株式会社 | 無線送信装置 |
JP5098676B2 (ja) * | 2008-02-01 | 2012-12-12 | 三菱電機株式会社 | 移動体通信システム |
US9094937B2 (en) * | 2009-08-26 | 2015-07-28 | Telefonaktiebolaget L M Ericsson (Publ) | Serving cell reselection methods and apparatus |
JP5298062B2 (ja) * | 2010-04-26 | 2013-09-25 | シャープ株式会社 | 移動局装置、通信システム、セル再選択方法および集積回路 |
US9686770B2 (en) * | 2010-06-15 | 2017-06-20 | Mediatek Inc. | Methods to support MBMS service continuity and counting and localized MBMS service |
WO2012115377A2 (en) * | 2011-02-21 | 2012-08-30 | Lg Electronics Inc. | Apparatus for performing a cell selection in a wireless communication system and method thereof |
EP2764727A4 (en) * | 2011-10-04 | 2015-08-05 | Samsung Electronics Co Ltd | METHOD AND SYSTEM FOR MANAGING CELL SELECTION IN A WIRELESS NETWORK SYSTEM |
KR20130038763A (ko) * | 2011-10-10 | 2013-04-18 | 주식회사 팬택 | 멀티미디어 방송 다중송출 서비스의 연속성을 위한 핸드오버 장치 및 방법 |
US9603066B2 (en) | 2012-06-18 | 2017-03-21 | Qualcomm Incorporated | EMBMS service continuity during UE mobility |
GB2506888B (en) * | 2012-10-10 | 2015-03-11 | Broadcom Corp | Reselection |
KR20170106444A (ko) * | 2015-01-21 | 2017-09-20 | 노키아 솔루션스 앤드 네트웍스 오와이 | 서비스 기반 셀 재-선택 |
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US20170257811A1 (en) | 2017-09-07 |
KR102217649B1 (ko) | 2021-02-19 |
EP3209059B1 (en) | 2019-07-24 |
EP3209059A4 (en) | 2017-08-23 |
CN107005818A (zh) | 2017-08-01 |
WO2016060491A3 (ko) | 2016-06-09 |
EP3209059A2 (en) | 2017-08-23 |
CN107005818B (zh) | 2020-11-24 |
US10687266B2 (en) | 2020-06-16 |
JP2017531403A (ja) | 2017-10-19 |
KR20160044326A (ko) | 2016-04-25 |
JP6887376B2 (ja) | 2021-06-16 |
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