WO2017026764A1 - 무선 통신 시스템에서 비연속 수신 모드를 적용하는 방법 및 장치 - Google Patents
무선 통신 시스템에서 비연속 수신 모드를 적용하는 방법 및 장치 Download PDFInfo
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- WO2017026764A1 WO2017026764A1 PCT/KR2016/008705 KR2016008705W WO2017026764A1 WO 2017026764 A1 WO2017026764 A1 WO 2017026764A1 KR 2016008705 W KR2016008705 W KR 2016008705W WO 2017026764 A1 WO2017026764 A1 WO 2017026764A1
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- WIPO (PCT)
- Prior art keywords
- drx
- information
- terminal
- base station
- paging
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/02—Power saving arrangements
- H04W52/0209—Power saving arrangements in terminal devices
- H04W52/0212—Power saving arrangements in terminal devices managed by the network, e.g. network or access point is master and terminal is slave
- H04W52/0216—Power saving arrangements in terminal devices managed by the network, e.g. network or access point is master and terminal is slave using a pre-established activity schedule, e.g. traffic indication frame
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/02—Power saving arrangements
- H04W52/0209—Power saving arrangements in terminal devices
- H04W52/0212—Power saving arrangements in terminal devices managed by the network, e.g. network or access point is master and terminal is slave
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W48/00—Access restriction; Network selection; Access point selection
- H04W48/08—Access restriction or access information delivery, e.g. discovery data delivery
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W48/00—Access restriction; Network selection; Access point selection
- H04W48/08—Access restriction or access information delivery, e.g. discovery data delivery
- H04W48/12—Access restriction or access information delivery, e.g. discovery data delivery using downlink control channel
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W68/00—User notification, e.g. alerting and paging, for incoming communication, change of service or the like
- H04W68/02—Arrangements for increasing efficiency of notification or paging channel
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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
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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
- H04W72/29—Control channels or signalling for resource management between an access point and the access point controlling device
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W76/00—Connection management
- H04W76/20—Manipulation of established connections
- H04W76/28—Discontinuous transmission [DTX]; Discontinuous reception [DRX]
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- Y—GENERAL 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Definitions
- the present invention relates to a mobile communication system, and more particularly, to a method and apparatus for applying a discontinuous reception mode in a wireless communication system.
- a 5G communication system or a pre-5G communication system is called a system after a 4G network (Beyond 4G Network) or a system after an LTE system (Post LTE).
- 5G communication systems are being considered for implementation in the ultra-high frequency (mmWave) band (eg, such as the 60 Gigabit (60 GHz) band).
- FD-MIMO massive array multiple input / output
- FD-MIMO massive array multiple input / output
- FD-MIMO massive array multiple input / output
- FD-MIMO massive array multiple input / output
- FD-MIMO massive array multiple input / output
- Array antenna, analog beam-forming, and large scale antenna techniques are discussed.
- 5G communication systems have advanced small cells, advanced small cells, cloud radio access network (cloud RAN), ultra-dense network (ultra-dense network) , Device to Device communication (D2D), wireless backhaul, moving network, cooperative communication, Coordinated Multi-Points (CoMP), and interference cancellation
- cloud RAN cloud radio access network
- D2D Device to Device communication
- D2D Device to Device communication
- CoMP Coordinated Multi-Points
- Hybrid FSK and QAM Modulation FQAM
- SWSC Slide Window Superposition Coding
- ACM Advanced Coding Modulation
- FBMC Fan Bank Multi Carrier
- NOMA non orthogonal multiple access
- SCMA sparse code multiple access
- IoT Internet of Things
- IoE Internet of Everything
- M2M machine to machine
- MTC Machine Type Communication
- IT intelligent Internet technology services can be provided that collect and analyze data generated from connected objects to create new value in human life.
- IoT is a field of smart home, smart building, smart city, smart car or connected car, smart grid, health care, smart home appliances, advanced medical services, etc. through convergence and complex of existing information technology (IT) technology and various industries. It can be applied to.
- the wireless communication system has been developed for the purpose of providing communication while ensuring the mobility of the user.
- wireless communication technology has made rapid progress, and communication system technology is evolving accordingly.
- Such a wireless communication system has reached a stage capable of providing high-speed data communication service as well as voice communication due to the rapid development of technology.
- the next generation of mobile communication systems has developed beyond human to human (H2H) and into human to machine (H2M) and machine to machine (M2M).
- the terminal may operate in a discontinuous reception mode (DRX) to reduce power consumption.
- the terminal may perform a reception operation to receive a paging signal from the base station.
- DRX discontinuous reception mode
- the terminal may perform a reception operation to receive a paging signal from the base station.
- a reception operation may be performed periodically by performing a reception operation only for a specific time interval, which may be referred to as DRX.
- eDRX extended DRX
- MME mobility management entity
- the base station may inform the terminal through the paging message that the system information has been changed.
- extended DRX when extended DRX is applied, a case in which a paging message may not be received may occur, and the terminal may not be able to check whether system information has been changed. Therefore, the terminal needs a method for checking whether system information has changed.
- the present invention has been made to solve the above problems, it characterized in that the terminal provides a method for applying the eDRX by checking whether the base station and the MME eDRX support.
- the present invention is characterized by providing a method for receiving a changed system information by checking whether the terminal changes the system information.
- Method of the terminal of the present invention for solving the above problems, receiving the system information from the base station, when the system information includes the first information related to the second DRX operating in a second period, the second Sending a request message including a second information related to DRX to a mobility management entity (MME), receiving a response message corresponding to the request message from the MME, and sending the second message to the response message.
- MME mobility management entity
- the third information related to the DRX is included, performing the second DRX operation based on the third information.
- the method of the base station of the present invention for solving the above problems, if the base station supports a second DRX operating in a second period, transmitting the system information including the first information related to the second DRX to the terminal Receiving a paging message including third information related to the second DRX from a mobility management entity (MME), and performing the second DRX operation based on the third information. It is characterized by including.
- MME mobility management entity
- the terminal receives the system information including the first information related to the second DRX operating in a second period In the case of receiving a request message including second information related to the second DRX from the terminal, transmitting a response message including the third information related to the second DRX in response to the request message, And transmitting a paging message including the third information to the base station.
- MME mobility management entity
- the terminal of the present invention for solving the above problems is a transmission and reception unit for transmitting and receiving a signal to another network entity, and a system related to the second DRX that receives system information from the base station, and operates in a second period to the system information If 1 information is included, send a request message including a second information related to the second DRX to a mobility management entity (MME), receive a response message corresponding to the request message from the MME, When the response message includes the third information related to the second DRX, it characterized in that it comprises a control unit for performing the second DRX operation based on the third information.
- MME mobility management entity
- the base station of the present invention for solving the above problems is a first transmission and reception unit for transmitting and receiving a signal to and from another network entity, and if the base station supports a second DRX operating in a second period, the first associated with the second DRX Transmitting system information including the information to the terminal, receiving a paging message including the third information related to the second DRX from a mobility management entity (MME), and based on the third information, the second DRX And a control unit for performing an operation.
- MME mobility management entity
- the mobility management entity (MME) of the present invention for solving the above problems is a transceiver unit for transmitting and receiving a signal with another network entity, and the first DRX associated with the second DRX in which the terminal operates in a second period
- the system information including the information receiving a request message including the second information related to the second DRX from the terminal, the response message including the third information related to the second DRX in response to the request message
- a control unit for transmitting the paging message including the third information to the base station.
- the terminal can determine whether the base station and the MME supports the eDRX through the method proposed by the present invention, and can reduce the power consumption of the terminal by applying the eDRX.
- the terminal can check whether the system information has been changed and can efficiently perform the eDRX operation by receiving the changed system information.
- FIG. 1 is a diagram illustrating a communication scenario according to the present invention.
- FIG. 2 is a diagram illustrating a paging time point in the first DRX.
- FIG. 3 is another diagram illustrating a paging time point in accordance with the present invention.
- FIG. 4 is a diagram illustrating a process of determining, by a terminal, a first DRX cycle.
- FIG. 5 is a diagram illustrating a process of determining, by a terminal, a second DRX cycle according to a first method of the first embodiment of the present invention.
- FIG. 6 is a diagram illustrating a terminal operation according to the first method of the first embodiment of the present invention.
- FIG. 7 is a diagram illustrating an operation of a base station according to the first method of the first embodiment of the present invention.
- FIG. 8 is a diagram illustrating an MME operation according to the first method of the first embodiment of the present invention.
- FIG. 9 is a diagram illustrating a method of determining, by a terminal, a second DRX cycle according to a second method of the first embodiment of the present invention.
- FIG. 10 is a diagram illustrating a terminal operation according to the second method of the first embodiment of the present invention.
- FIG. 11 is a diagram illustrating an operation of a base station according to the second method of the first embodiment of the present invention.
- FIG. 12 is a diagram illustrating an MME operation according to a second method of the second embodiment of the present invention.
- FIG. 13 shows a configuration of a terminal according to the present invention.
- FIG. 14A illustrates a block configuration of a base station according to the present invention.
- 14B is a diagram illustrating a configuration of an MME according to an embodiment of the present invention.
- 15 is a diagram illustrating a process of changing system information.
- 16A is a diagram illustrating a method of notifying a terminal of changed system information according to a second embodiment of the present invention.
- 16B is a view illustrating a correction section according to a second embodiment of the present invention.
- 17 is a diagram illustrating a terminal operation according to a second embodiment of the present invention.
- 18A is a diagram illustrating the operation of a base station in the present invention.
- 18b illustrates another operation of a base station in the present invention.
- FIG. 19 shows a block configuration of a terminal according to the present invention.
- 20 is a diagram illustrating a configuration of a base station according to the present invention.
- 21 is a diagram illustrating a method of notifying a terminal of changed system information according to a third embodiment of the present invention.
- FIG. 22 is a diagram illustrating a terminal operation according to a third embodiment of the present invention.
- FIG. 23 is a diagram illustrating the operation of a base station according to the third embodiment of the present invention.
- FIG. 24 is a block diagram of a terminal according to a third embodiment of the present invention.
- 25 is a block diagram of a base station according to the third embodiment of the present invention.
- FIG. 26 is a diagram illustrating a method of notifying a terminal of changed system information according to a fourth embodiment of the present invention.
- FIG. 27 is a diagram illustrating a terminal operation according to the fourth embodiment of the present invention.
- 28 is a diagram illustrating an operation of a base station in the present invention.
- 29 shows a block configuration of a terminal according to the present invention.
- FIG. 30 shows a block configuration of a base station according to 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 communication scenario according to the present invention.
- communication devices 105 may be connected to a wireless provider network 110.
- mechanical communication devices may be generally defined as various unmanned devices such as meters or automatic vending machines, and have various characteristics.
- the mechanical communication device may have different features depending on the type.
- the communication server 115 having information on the communication devices may collect and collect information collected from the communication devices as well as the authentication device and transmit the collected information to the communication user 120.
- the communication server may exist inside or outside the wireless carrier network.
- the communication user 120 may refer to an end user who needs information transmitted from a communication device.
- a mechanical communication device for performing machine-to-machine communication as an example of a communication device will be described as an example.
- the communication device may include a communication device performing communication between people, a communication device performing communication between a person and a machine, and the like. That is, the present invention can be applied to all communication devices that require a reduction in power consumption.
- mechanical communication has a variety of other features.
- the characteristics can be classified in various ways. For example, communication devices that require communication only a predetermined number of times a day, regardless of time, have a feature that is time tolerant.
- mechanical communication devices installed at one location and collecting and transmitting specific information without mobility have low mobility. The wireless operator should provide a service in consideration of the characteristics of these various types of mechanical communication and coexistence with existing terminals.
- tracking-related devices such as animals and freight vehicles generally use batteries or generate their own power to be supplied with power. Therefore, since these mechanical communication devices must use limited power, it is desirable to use extremely small power efficiently.
- An extra low power consumption mode is defined in such a mechanical communication device, and the mechanical communication devices may be configured to use low power in the corresponding mode.
- DRX operating in an existing period may operate in a first DRX, an increased period (which may be referred to as a second period or a second DRX period).
- DRX may be referred to as eDRX or second DRX. Therefore, in the present invention, the first DRX may be defined as DRX operating in the first period, the second DRX may be defined as DRX operating in the second period, and the second period may include a period longer than the first period.
- a first DRX operation of UEs in a standby state may be performed through Equation 1 below.
- the system frame number (SFN) may increase by 1 for each radio frame.
- the terminal may perform a reception operation by the first DRX.
- a radio frame through which a paging signal is transmitted may be referred to as a paging frame (PF).
- PF paging frame
- PO paging occasion
- SFN System Frame Number. It may consist of 10 bits. (MSB 8 bits explicit, LBS 2 bits implicit)
- T DRX cycle information of the UE. It may be transmitted through a system information block (hereinafter, may be used interchangeably with SIB) 2 (Transmitted on SIB2).
- SIB system information block
- Paging-related first parameter (nB) may be transmitted on SIB2 (Transmitted on SIB2).
- IMSI mod 1024 IMSI mod 1024 (IMSI may mean a unique number assigned to each terminal)
- the SFN may be transmitted to the terminal through a master information block (MIB). 8 bits of the MIB transmitted through the physical broadcast channel (PBCH) may indicate SFN.
- MIB master information block
- PBCH physical broadcast channel
- the first DRX period information T and the paging related first parameter nB may be provided through the SIB.
- the first DRX period information T and the paging related first parameter nB may be included in the SystemInformationBlockType2 (SIB2) and provided from the base station.
- the first DRX period information T may have one of ⁇ rf32, rf64, rf128, rf256 ⁇ , and r32 may indicate a length of 32 radio frames. That is, r32 may mean 320 ms.
- the paging related first parameter nB may indicate the number of paging or the frequency of paging.
- the first DRX period information T and the paging related first parameter nB provided through the SIB may be referred to as first DRX configuration information or first DRX parameter.
- FIG. 2 is a diagram illustrating a paging time point in the first DRX.
- the system frame number (SFN) may increase by one for every radio frame (205).
- the system frame number (SFN) may be reset to a value of zero in a period of 1024 (210).
- paging of the same pattern may be repeated every SFN period (215).
- the maximum period of the first DRX is 2.56 seconds, and even if the first DRX period is increased as much as possible, it cannot be exceeded the period of the SFN, that is, 10.24 seconds.
- the SFN period must also be increased together to increase the first DRX period by 10.24 seconds or more.
- an additional SFN bit may be included in an existing or new SIB and a terminal operation for receiving the SFN bit may be defined.
- the SFN bit is characterized by increasing by 1 every SFN period.
- the value indicated by the additional SFN bit may be referred to as a hyper system frame number (HFN).
- the SIB including the additional SFN bit does not need to be received by all terminals, and can only attempt to receive the terminal to which a very long DRX cycle is applied.
- the system information change-related information (systemInfoValueTag value (one information included in SIB1)) and paging, which is incremented by one each time the SIB information is changed, are included in the paging to determine whether the system information (SI) is changed.
- the informing system information change indicator (systemInfoModification IE) is not affected by the change in the SFN bit value. That is, even if the SFN bit value is changed, the system information change related information (systemInfoValueTag IE) is not updated, and the system information change indicator (systemInfoModification IE) is not transmitted through paging.
- FIG. 3 is another diagram illustrating a paging time point in accordance with the present invention.
- the HFN may increase by 1 for every SFN period. That is, the HFN 305 may be composed of 1024 SFNs 310. In addition, the SFN may be increased by one for each radio frame (310).
- the base station may generate paging by Equation 1 in the SFN cycle determined by Equation 2, which will be described below (320).
- the present invention assumes a method of receiving a paging signal several times during a predetermined DRX interval in order to increase the DRX cycle and increase the probability of receiving a paging signal.
- the paging point can be determined through a two-step process.
- second step determining the radio frame in which paging will occur in the SFN cycle (SFN cycle or HFN) determined in the first step.
- the added SFN bits may have a value increased by one for every SFN cycle.
- a value represented by the added SFN bits may be defined as a hyper system frame number (HFN).
- the UE may check the SFN cycle (SFN cycle) that the paging will occur using Equation 2.
- SFN cycle SFN cycle
- HFN paging hyper frame
- UE_ID IMSI mod 1024 (or MTC device group ID mod 1024)
- the second DRX period information T ′ and the paging related second parameter nB ′ value may be provided from the base station through the SIB.
- the second DRX period information T ⁇ and the paging related second parameter nB ⁇ may be included in the SIB2 or transmitted in the other SIB together with the first DRX period information T and the paging related first parameter nB. Can be.
- the second DRX period information T ′ and the paging related second parameter nB ′ provided through the SIB may be referred to as second DRX configuration information or second DRX parameters.
- the terminal identifier UE_ID may be derived from the same IMSI module operation as the general terminal. In the case of a mechanical communication device, since the device can be represented in the form of a group ID, the group ID can also be applied.
- the UE After determining the PHF which is the SFN cycle (SFN cycle) for paging, the UE may determine which radio frames in the corresponding SFN cycle. The UE may identify a radio frame in which paging will occur in a corresponding SFN period using Equation 1.
- the paging occurrence time is defined in two steps, and communication devices have a DRX cycle accordingly, power consumption can be greatly reduced.
- the paging may occur repeatedly according to the first DRX cycle information (T) and the paging related first parameter (nB) in the SFN cycle determined in the first step, it is possible to increase the probability of paging reception. Have.
- a DRX operation may be performed according to a first period during a specific period when the second period arrives.
- the specific section may be referred to as a paging time window (PTW).
- PGW paging time window
- the paging reception probability can be increased by repeatedly receiving the paging during a specific period.
- FIG. 4 is a diagram illustrating a process of determining, by a terminal, a first DRX cycle.
- the base station 405 may transmit the system information to the terminal in step S410.
- the base station 405 may provide the terminal 400 with first DRX-related first information (eg, a default DRX value) by using SIB2, which is one of system information broadcasted to the terminal.
- the first information related to the first DRX may refer to the first DRX period information provided by the base station to the terminal.
- the terminal receiving the system information may transmit a request message to the MME in step S420.
- the request message may include, for example, an attach request message or a tracking area update (TAU) message.
- TAU tracking area update
- the request message may be transmitted to the MME through the base station as a non-access stratum message.
- the terminal may transmit a desired DRX cycle to the MME through an ATTACH process. That is, the terminal may transmit the first DRX related second information (eg, UE specific DRX value) to the MME 410 in the request message.
- the first DRX related second information (UE specific DRX value) may include first DRX period information desired by the terminal.
- the MME may transmit a paging message to the base station in step S430.
- the MME may transmit the first DRX related second information (UE specific DRX value) provided from the terminal together with paging to the base station.
- the terminal determines a smaller value of the first DRX-related second information (UE specific DRX value) and the first DRX-related first information (default DRX value) provided from the base station as the first DRX cycle. Can be.
- the base station also determines a smaller value of the first DRX-related second information (UE specific DRX value) received from the MME in step S450 and the first DRX-related first information (default DRX value) broadcasted by the first DRX cycle. Can be.
- the terminal and the base station may select the same first DRX cycle, the base station may determine the paging frame (PF) based on the first DRX cycle, and then transmit the paging to the terminal.
- PF paging frame
- the present invention proposes a method of determining whether to apply a second DRX (eDRX) between a UE, a base station, and an MME when applying a second DRX (eDRX) using an increased DRX cycle.
- the first method proposes a method of independently considering whether the MME and the base station support the second DRX (eDRX), and the second method proposes a method of considering only whether the base station supports the second DRX (eDRX).
- the MME notifies the UE of whether to support the second DRX (eDRX) using a response message (eg, an ATTACH ACCEPT or TAU ACCEPT message) corresponding to the request message received from the UE.
- the UE may determine whether to apply the second DRX (eDRX) in consideration of whether the MME supports the second DRX (eDRX) and whether the serving cell supports the second DRX (eDRX).
- FIG. 5 is a diagram illustrating a process of determining, by a terminal, a second DRX cycle according to a first method of the first embodiment of the present invention.
- the base station may broadcast system information in step S510. If the base station 503 supports the second DRX (eDRX), it may broadcast system information including the first information related to the second DRX.
- the base station can provide SIB2 and SIBx.
- SIB2 may include first DRX-related first information (existing default DRX value), and SIBx may include second DRX-related first information.
- the first information related to the second DRX may include information indicating whether to support the second DRX (second DRX support indicator) or a default eDRX value.
- the first information related to the second DRX may be included in an existing SIB or a newly defined SIB.
- the first information related to the second DRX may be included in SIB 1.
- the terminal may transmit a request message to the base station.
- the UE may transmit the first DRX related second information (UE specific DRX value) and the second DRX related second information (UE specific eDRX value) to the MME using a request message (ATTACH REQUEST or TAU REQUEST message).
- the terminal transmits the second DRX-related second to the MME 505.
- Information eg, desired UE specific DRX value.
- the second DRX related second information may include second DRX period information desired by the terminal.
- the first DRX-related second information may include period information desired by the terminal for the first DRX
- the second DRX-related second information may include period information desired by the terminal for the second DRX. Can be.
- the reason for transmitting the first DRX-related second information (UE specific DRX value) to the MME is that if the MME does not support the second DRX (eDRX), the terminal may transmit the first DRX (eDRX). This is to apply the first DRX according to the DRX (existing DRX) application procedure.
- the paging frame PF and the paging time point PO through which the actual paging is transmitted are transmitted within the hyper frame number HFN through which paging is transmitted, the first DRX configuration information. Since it will be determined according to (existing DRX configuration information), in order to derive a first DRX cycle (existing DRX value), second information related to the first DRX must be provided to the MME.
- the MME may transmit a response message corresponding to the request message to the terminal in step S530.
- the MME may transmit second DRX related third information to the terminal using a response message (ATTACH ACCEPT or TAU ACCEPT message).
- the second DRX-related third information may include allowable second DRX cycle information, and the MME may provide second UE DRX (eDRX) cycle information through a response message. Alternatively, the MME may inform the UE that the MME supports the second DRX by including the second DRX-related third information in the response message.
- eDRX UE DRX
- the second DRX period information transmitted by the MME may be referred to as an allowed second DRX parameter.
- the allowable second DRX (eDRX) period information may be the same as the second DRX related second information (UE specific eDRX value) provided by the terminal to the MME through a request message (ATTACH REQUEST or TAU REQUEST message) or It may be different.
- the second DRX related third information may include an indicator indicating whether to support the second DRX.
- the third DRX-related third information is an indicator indicating whether to support the second DRX
- the second DRX-related third information may include 1-bit information.
- the second DRX-related third information included in the response message may mean that the second DRX-related second information (UE specific eDRX value) may be supported. At this time, the second DRX-related third information may be the same as the second DRX-related second information.
- the terminal may determine a DRX cycle in step S560.
- the terminal may determine the second DRX cycle using the second DRX-related third information.
- the terminal may transmit the second DRX-related second information or the second DRX-related third information to the second. Can be determined by the DRX cycle.
- the terminal may determine the second DRX-related third information as the second DRX cycle.
- the terminal when the terminal receives the second DRX-related third information from the MME and confirms that the MME supports the second DRX (eDRX), the terminal receives the first DRX-related first information (default DRX value) and the first one.
- a smaller value among the UE specific DRX may be determined as the first DRX cycle T.
- the UE sets a smaller or larger value of the second DRX-related first information value and the second DRX-related second information (UE specific edRX) to the second DRX (eDRX) period T ′. You can decide.
- the UE DRX cycle a smaller value of the first DRX-related first information (default DRX value) and the first DRX-related second information (UE specific DRX) T can be determined.
- the MME transmitting the response message may transmit paging to the base station in step S570.
- the MME may transmit the first DRX related second information (UE specific DRX) and the second DRX related third information together with the paging for the terminal to the base station.
- the MME does not support the second DRX (eDRX)
- the base station may determine the DRX cycle in step S580. If it is confirmed that the MME supports the second DRX (eDRX), the base station may determine the second DRX cycle using the second DRX-related third information transmitted by the MME. In addition, the base station may determine a short value of the first DRX-related first information (default DRX value) and the first DRX-related second information (UE specific DRX) received from the MME as the DRX period T.
- eDRX the base station may determine the second DRX cycle using the second DRX-related third information transmitted by the MME.
- the base station may determine a short value of the first DRX-related first information (default DRX value) and the first DRX-related second information (UE specific DRX) received from the MME as the DRX period T.
- the base station determines, in relation to the second DRX cycle, a smaller or larger value of the second DRX-related first information and the second DRX-related third information (allowed eDRX parameter) received from the MME in a second DRX (eDRX) period. T ⁇ can be determined.
- the terminal may perform a DRX operation using the determined second DRX cycle and the first DRX cycle.
- the terminal may move, perform cell reselection, and then camp on a new serving cell.
- the terminal receives system information broadcasted by the serving cell, for example, first DRX-related first information (default DRX cycle) from SIB 2, paging-related first parameter (nB value), and second DRX from SIB x.
- the associated first information and the paging related second parameter (nB ′ value) may be obtained.
- the UE determines whether to apply the second DRX (eDRX) when both of the following conditions are met.
- the UE does not apply the second DRX (eDRX).
- the second TA has received the second DRX-related third information (allowed UE eDRX parameter) from the MME, but the UE does not include the second DRX-related first information in the system information of the current serving cell (or does not include the second DRX (eDRX) parameter).
- the second TA has received the second DRX-related third information (allowed UE eDRX parameter) from the MME, but the UE does not include the second DRX-related first information in the system information of the current serving cell (or does not include the second DRX (eDRX) parameter).
- the terminal may determine the second DRX-related third information received from the MME as a second DRX cycle.
- the terminal may determine a small or large value Min (or max) [default eDRX, UE eDRX] among the second DRX-related first information and the second DRX-related second information as the second DRX period (T ′). have.
- the terminal may determine a smaller value Min [default DRX, UE DRX] among the first DRX-related first information and the first DRX-related second information as the first DRX period T. Accordingly, the terminal may determine the second value.
- the PHF may be determined using the DRX period T ′, and the PF may be determined using the first DRX period T.
- the UE monitors paging in a hyper frame (HF) rather than the PHF.
- PG monitoring may be performed in the PF of the HF, which is the PHF, and the HF may refer to a frame indicated by the HFN.
- the terminal determines to apply the first DRX (not the second DRX)
- the terminal selects a smaller value (Min [default DRX, UE DRX]) of the first DRX-related first information and the first DRX-related second information. It may be determined as the first DRX cycle (T).
- the second DRX period T ⁇ may be regarded as 1 (ie, all HFs are regarded as PHFs), or the paging related second parameter nB ⁇ may be set as the second DRX period T ⁇ (same as all HFs) May be regarded as PHF). Therefore, the terminal may perform paging monitoring in the PF of all the HF.
- the MME may receive data from the S-GW.
- the current TA of the target UE to which the incoming data is to be transmitted is TA x
- all serving cells of the TA x support the second DRX (eDRX)
- the MME sends a second DRX-related third to the UE.
- the MME may generate a paging message including the first DRX-related second information (UE DRX cycle) and the second DRX-related third information (allowed UE eDRX cycle) to transmit to the base station. have.
- the serving cells of TA x do not support the second DRX (eDRX) or the MME does not transmit the second DRX-related third information (allowed UE eDRX parameter) to the UE, the first DRX-related second information (UE DRX cycle) Paging message) may be generated and transmitted to the base station.
- various names such as a default DRX cycle and a default DRX value may be used as the first information related to the first DRX.
- the first DRX-related second information may be used as a UE specific DRX value, a UE specific DRX cycle, a UE DRX cycle, a UE DRX, and the like.
- the second information related to the second DRX may be used as a UE specific eDRX value, a UE specific eDRX cycle, a UE eDRX cycle, a UE eDRX
- the third information related to the second DRX may include an allowed UE eDRX parameter and an allowed UE eDRX cycle.
- Various names may be used. However, only the names used are different, and the information included in each information may be the same.
- FIG. 6 is a diagram illustrating a terminal operation according to the first method of the first embodiment of the present invention.
- step S610 the terminal may be powered on or a TA may be changed.
- the terminal may acquire system information from the base station in step S620.
- the terminal acquiring the system information may check whether the second DRX configuration information is included in the system information in step S630. That is, the terminal may determine whether the system information includes the second DRX-related first information and the paging-related second parameter (nB ′ value).
- the UE may perform an RRC connection establishment process in step S640.
- the terminal may transmit a request message in step S650. If the UE prefers to apply the second DRX (eDRX), or if the UE supports the second DRX, the UE and the first DRX-related second information (UE specific DRX) in the request message (ATTACH REQUEST or TAU REQUEST message)
- the second DRX related second information (UE specific eDRX value) may be included and transmitted to the MME.
- the first DRX-related second information may include first DRX period information preferred by the terminal
- the second DRX-related second information may include second DRX period information preferred by the terminal.
- the period information preferred by the terminal may mean period information determined by the terminal to be applied.
- the UE may receive a response message (eg, an ATTACH ACCEPT or TAU ACCEPT message) corresponding to the request message from the MME.
- a response message eg, an ATTACH ACCEPT or TAU ACCEPT message
- the terminal may determine whether the response message includes third DRX-related third information (Allowed eDRX parameter) in step S670.
- the second DRX-related third information (Allowed eDRX parameter) may include information indicating whether the MME supports the second DRX (eDRX) or second DRX period information (eDRX period information) to be applied by the terminal. have.
- the UE may perform an RRC connection release procedure in step S675.
- the UE may operate by applying a second DRX (eDRX) in operation S680.
- eDRX second DRX
- the UE may derive the second DRX cycle (T ⁇ ) and the first DRX cycle (T) by using the method described above in step S685, and determine the PHF and PF.
- the above step may be performed in advance before RRC connection release.
- the terminal may attempt to receive its paging message at the paging reception timing indicated by the determined PHF and PF.
- the base station is not broadcasting the second DRX-related first information and the paging-related second parameter (nB ⁇ ) in step S630, or the MME is the second DRX-related third information (Allowed eDRX parameter) in step S670 If it is not transmitted, the terminal may perform only the first DRX (existing DRX) process in step S695.
- FIG. 7 is a diagram illustrating an operation of a base station according to the first method of the first embodiment of the present invention.
- the base station may determine whether it supports the second DRX (eDRX) in step S710.
- the base station may broadcast the system information in step S720. If the base station supports the second DRX, the base station is not only the first DRX-related first information and paging-related first parameter that is the first DRX configuration information, but also the second DRX-related first information and paging-related second parameter (nB ⁇ ). System information, including) can be broadcast to the terminal.
- the base station may broadcast the system information including only the first DRX configuration information in step S730. If the base station does not support the second DRX, it may operate according to the first DRX as described in FIG. 4, and detailed description thereof will be omitted.
- the base station may receive a paging for a specific terminal from the MME in step S740.
- the base station receiving the paging may determine whether the paging information includes the second DRX-related third information in step S750.
- the base station determines a smaller value of the first DRX-related first information (default DRX) and the first DRX-related second information (UE specific DRX value) in step S760. It can be determined by 1 DRX cycle T. In addition, the base station may determine the second DRX cycle information indicated by the second DRX-related third information included in the paging information as the second DRX cycle.
- the base station may determine a small value (or a large value) of the second DRX-related first information and the second DRX-related third information received from the MME as the second DRX (eDRX period) T ′.
- the base station determines a smaller value of the first DRX-related first information (default DRX) and the first DRX-related second information (UE specific DRX value) in step S770. It may be determined as the first DRX period T.
- the base station may transmit a paging by calculating PHF, PF, and PO based on at least one of the second DRX period T ′ and the first DRX period T. That is, when the paging information received from the MME does not include the second DRX-related third information, the base station may transmit paging using only the first DRX cycle, and the second DRX-related information may be transmitted to the paging information received from the MME. If 3 information is included, paging may be transmitted based on the second DRX cycle (T ⁇ ) and the first DRX cycle (T).
- the base station may repeatedly transmit paging in a specific period (PTW) according to the first DRX cycle.
- PW specific period
- FIG. 8 is a diagram illustrating an MME operation according to the first method of the first embodiment of the present invention.
- the MME may receive a request message from the terminal.
- the MME may determine whether a request message (ATTACH REQUEST or TAU REQUEST message) including the second DRX related second information (UE specific eDRX) is received from the terminal in step S810.
- a request message ATTACH REQUEST or TAU REQUEST message
- the second DRX related second information UE specific eDRX
- the MME may determine whether the MME can support the second DRX (eDRX) in operation S820.
- the MME may transmit a response message in step S830.
- the MME may include the second DRX-related third information (Allowed eDRX parameter) in the response message (ATTACH ACCEPT or TAU ACCEPT message) and transmit the same to the UE.
- the second DRX-related third information may be the same as the second DRX-related second information or may include period information of the second DRX determined by the MME.
- step S840 paging for the terminal may be triggered.
- the MME may additionally provide second base station-related third information with the paging in step S850. That is, the MME may transmit paging including the second DRX related third information to the base station.
- the MME may perform an operation according to the first DRX in step S860. That is, the MME may transmit a response message to the terminal and may transmit a paging message including the first DRX related second information to the base station.
- the base station broadcasts the second DRX (eDRX) configuration information (or the second DRX parameter) only when all the base stations and the MME constituting one TA support the eDRX.
- the second DRX (eDRX) parameter may be broadcast as system information. Therefore, as in the first method, the MME does not need to inform the UE whether to support the second DRX (eDRX) using a response message (ATTACH ACCEPT or TAU ACCEPT message).
- FIG. 9 is a diagram illustrating a method for determining a second DRX cycle by a terminal according to a second method of the first embodiment of the present invention.
- the base station 903 may broadcast system information in step S910.
- the base station 903 may broadcast the second DRX related first information if all the base stations constituting the TA including the self and the associated MME support the second DRX (eDRX).
- the terminal 901 may receive system information from the base station in step S920.
- the terminal may be provided with SIB2 and SIBx.
- the SIB2 may include first DRX related first information (existing default DRX value), and the SIBx may include second DRX related first information.
- the first information related to the second DRX may include information indicating whether to support the second DRX (second DRX support indicator) or a default eDRX value.
- the first information related to the second DRX may be included in an existing SIB or a newly defined SIB.
- the first information related to the second DRX may be included in SIB 1.
- the terminal may provide second information related to the second DRX to the MME. Specifically, if the base station is broadcasting the second DRX-related first information, and the terminal determines that the application of the second DRX (eDRX) is necessary, the terminal to the MME (905) the second DRX-related second information (Desired UE specific DRX value).
- the second DRX related second information may include second DRX period information desired by the terminal.
- the terminal may transmit a request message to the MME in step S940.
- the UE may transmit the first DRX-related second information (UE specific DRX value) and the second DRX-related second information (UE specific eDRX value) using a request message (eg, an ATTACH REQUEST or TAU REQUEST message).
- a request message eg, an ATTACH REQUEST or TAU REQUEST message.
- the first DRX-related second information may include period information desired by the terminal for the first DRX
- the second DRX-related second information may include period information desired by the terminal for the second DRX. Can be.
- the UE may determine a DRX cycle in step S950.
- the terminal may determine a smaller value of the first DRX-related first information (default DRX value) and the first DRX-related second information (UE specific DRX) as the first DRX period (T). In addition, the terminal may determine the second DRX-related second information transmitted to the MME as a second DRX cycle. Alternatively, the terminal may determine a smaller or larger value of the second DRX-related first information and the second DRX-related second information (UE specific edRX) as the second DRX (eDRX) period T ′.
- the user equipment determines whether the first DRX-related first information (the existing default DRX value) and the first DRX-related second information (UE specific DRX) are smaller.
- the value may determine only the first DRX period T.
- the MME receiving the request message may transmit paging to the base station in step S960.
- the MME may transmit the first DRX related second information (UE specific DRX) and the second DRX related second information (UE specific eDRx value) to the base station together with paging for the terminal.
- the paging may include only the first DRX-related second information.
- the base station may determine the DRX cycle in step S970.
- the base station may determine a smaller value of the first DRX-related first information (default DRX value) and the first DRX-related second information (UE specific DRX) as the DRX period T.
- the base station may determine the second DRX related second information received from the MME as the second DRX.
- the base station may determine a small or long value of the second DRX-related first information and the second DRX-related second information (UE specific edRX) as the second DRX (eDRX) period T ′.
- the process of determining the second DRX cycle may be omitted.
- the terminal may perform a DRX operation using the determined second DRX cycle and the first DRX cycle.
- the terminal may move, perform cell reselection, and then camp on a new serving cell.
- the terminal receives system information broadcast by the serving cell, for example, first DRx-related first information (default DRX cycle) from SIB 2, paging-related first parameter (nB value), and second DRX from SIB x.
- the associated first information and the paging related second parameter (nB ′ value) may be obtained.
- the terminal may determine whether to apply the second DRX (eDRX).
- the UE does not apply the second DRX (eDRX).
- the second DRX related second information (UE eDRX) is not transmitted to the MME in the current TA.
- the second DRX-related second information is transmitted to the MME, but the second DRX-related first information is not included in the system information of the current serving cell (or the second DRX (eDRX) parameter is not included).
- the UE may determine the second DRX-related second information transmitted to the MME as a second DRX cycle.
- the terminal may determine a small value or a large value Min (or max [default eDRX, UE eDRX]) of the second DRX-related first information and the second DRX-related second information as the second DRX period (T ′). have.
- the UE may determine a smaller value Min [default DRX, UE DRX] among the first DRX-related first information and the first DRX-related second information as the first DRX cycle (T). Accordingly, the terminal may determine the PHF using the second DRX period T ′ and determine the PF using the first DRX period T. As described above, the terminal does not perform paging monitoring in the HF other than the PHF, and may perform paging monitoring in the PF of the HF which is the PHF.
- the terminal determines to apply the first DRX (not the second DRX)
- the terminal is a smaller value (Min [default DRX, UE DRX]) of the first DRX-related first information and the first DRX-related second information May be determined as the first DRX cycle (T).
- the second DRX period T ⁇ may be regarded as 1 (that is, all HFs are regarded as PHFs), or the paging related second parameter nB ⁇ may be set to T ⁇ (similarly, all HFs are referred to as PHFs). Can be considered). Therefore, the terminal may perform paging monitoring in the PF of all the HF.
- the MME may receive the incoming data from the S-GW.
- a current TA of a target terminal to which data (Incoming data) is to be transmitted is TA x
- the MME determines the first DRX related second information ( A paging message including a UE DRX cycle) and second information related to the second DRX (UE specific eDRX cycle) may be generated and transmitted to the base station.
- the MME performs the first DRX-related second information (UE DRX cycle). Paging message) may be generated and transmitted to the base station.
- FIG. 10 is a diagram illustrating an operation of a terminal according to the second method of the first embodiment of the present invention.
- step S1010 the power of the terminal may be turned on or the TA (Tracking Area) may be changed.
- the terminal may obtain system information from the base station in step S1020.
- the terminal acquiring the system information may check whether the second DRX configuration information is included in the system information in step S1030. That is, the terminal may determine whether the system information includes the second DRX-related first information and the paging-related second parameter (nB ′ value).
- the UE may perform an RRC connection establishment process in step S1040.
- the terminal may transmit a request message to the MME in step S1050.
- the UE prefers to apply the second DRX (eDRX), or if the UE supports the second DRX, the UE and the first DRX-related second information (UE specific DRX) in the request message (ATTACH REQUEST or TAU REQUEST message)
- the second DRX related second information (UE specific eDRX value) may be included and transmitted to the MME.
- the first DRX-related second information may include first DRX period information preferred by the terminal
- the second DRX-related second information may include second DRX period information preferred by the terminal.
- the period information preferred by the terminal may mean period information determined by the terminal to be applied.
- the terminal may receive a response message (eg, an ATTACH ACCEPT or TAU ACCEPT message) corresponding to the request message from the MME.
- a response message eg, an ATTACH ACCEPT or TAU ACCEPT message
- the terminal may perform an RRC connection release procedure in operation S1070.
- the terminal that has released the RRC connection may operate by applying the second DRX (eDRX) in step S1075.
- the terminal may derive the second DRX cycle (T ⁇ ) and the first DRX cycle (T) by using the method described above in step S1080, and determine the PHF and PF.
- the above step may be performed in advance before RRC connection release.
- the terminal may attempt to receive its paging message at the paging reception timing indicated by the determined PHF and PF.
- the terminal may perform only the first DRX (existing DRX) process in step S1090. .
- FIG. 11 is a diagram illustrating an operation of a base station according to the second method in the first embodiment of the present invention.
- the base station may determine whether all base stations and MMEs constituting the TA to which the base station belongs to support the second DRX (eDRX).
- the base station may broadcast system information in step S1120. If all the base station and the MME supports the second DRX, the base station is not only the first DRX-related first information and paging-related first parameter that is the first DRX (existing DRX) configuration information, but also the second DRX-related first information, paging System information including the relevant second parameter nB ⁇ may be broadcast to the terminal.
- the base station may broadcast system information including only the first DRX (existing DRX) configuration information in step S1130. If the base station does not support the second DRX, it may operate according to the first DRX as described in FIG. 4, and detailed description thereof will be omitted.
- the base station may receive the paging for the terminal from the MME in step S1140.
- the base station receiving the paging may determine whether the second information related to the second DRX (UE specific eDRX value) is included in the paging information in operation S1150.
- the base station selects a smaller value of the first DRX-related first information (default DRX) and the first DRX-related second information (UE specific DRX value). It can be determined by the DRX cycle T. Also, the base station may determine the second DRX related second information included in the paging as the second DRX cycle.
- the base station may determine a small value (or a large value) of the second DRX-related first information and the second DRX-related second information (UE specific eDRX value) as the second DRX (eDRX) period T ′.
- the base station removes a smaller value of the first DRX-related first information (default DRX) and the first DRX-related second information (UE specific DRX value). It can be determined by 1 DRX cycle T.
- the base station calculates PHF, PF, and PO based on at least one of the second DRX period information T ′ and the first DRX period information T in step S1180 to transmit paging. That is, if the paging information received from the MME does not include the second DRX-related second information, the base station may transmit paging using only the first DRX cycle information, and the second DRX-related to the paging information received from the MME. When the second information is included, paging may be transmitted based on the second DRX period information T ′ and the first DRX period information T.
- the base station may repeatedly transmit paging in a specific period (PTW) according to the first DRX cycle.
- PW specific period
- FIG. 12 is a diagram illustrating an MME operation according to a second method in a second embodiment of the present invention.
- the MME may receive a request message from the terminal.
- the MME may determine whether a request message (ATTACH REQUEST or TAU REQUEST message) including the second DRX related second information (UE specific eDRX) is received from the UE in step S1210.
- a request message ATTACH REQUEST or TAU REQUEST message
- the second DRX related second information UE specific eDRX
- paging for the terminal may be triggered in step S1220.
- the MME may additionally provide second DRX related second information (UE specific eDRX value) to the base station together with paging in step S1230. That is, the MME may transmit paging including the second DRX related second information to the base station.
- second DRX related second information UE specific eDRX value
- the MME may perform an operation according to the first DRX in step S1240. have. That is, the MME may transmit a response message to the terminal and may transmit a paging message including the first DRX related second information to the base station.
- FIG. 13 shows a configuration of a terminal according to the present invention.
- the terminal may include a radio frequency (RF) processor 1310, a baseband processor 1320, a storage 1330, and a controller 1340.
- RF radio frequency
- the RF processor 1310 may perform a function for transmitting and receiving a signal through a wireless channel such as band conversion and amplification of a signal. That is, the RF processor 1310 up-converts the baseband signal provided from the baseband processor 1320 to an RF band signal and transmits the same through an antenna, and transmits an RF band signal received through the antenna to a baseband signal. Can be downconverted to
- the RF processor 1310 may include a transmission filter, a reception filter, an amplifier, a mixer, an oscillator, a digital to analog convertor (DAC), an analog to digital convertor (ADC), and the like. . In FIG. 13, only one antenna is illustrated, but the terminal may include a plurality of antennas.
- the RF processor 1310 may include a plurality of RF chains.
- the RF processor 1310 may perform beamforming. For the beamforming, the RF processor 810 may adjust the phase and magnitude of each of the signals transmitted and received through a plurality of antennas or antenna elements.
- the baseband processor 1320 may perform a baseband signal and bit string conversion function according to the physical layer standard of the system. For example, during data transmission, the baseband processor 1320 may generate complex symbols by encoding and modulating a transmission bit string. In addition, when receiving data, the baseband processor 1320 may restore the received bit string by demodulating and decoding the baseband signal provided from the RF processor 1310. For example, according to an orthogonal frequency division multiplexing (OFDM) scheme, during data transmission, the baseband processor 1320 generates complex symbols by encoding and modulating a transmission bit stream and maps the complex symbols to subcarriers. After that, OFDM symbols may be configured through inverse fast Fourier transform (IFFT) operation and cyclic prefix (CP) insertion.
- OFDM orthogonal frequency division multiplexing
- the baseband processor 1320 splits the baseband signal provided from the RF processor 1310 in OFDM symbol units and performs the signals mapped to the subcarriers through a fast fourier transform (FFT) operation. After reconstruction, the reception bit stream may be reconstructed by demodulation and decoding.
- FFT fast fourier transform
- the baseband processor 1320 and the RF processor 1310 may transmit and receive signals as described above. Accordingly, the baseband processor 1320 and the RF processor 1310 may be referred to as a transmitter, a receiver, a transceiver, or a communicator. Furthermore, at least one of the baseband processor 820 and the RF processor 1310 may include a plurality of communication modules to support a plurality of different radio access technologies. In addition, at least one of the baseband processor 1320 and the RF processor 1310 may include different communication modules to process signals of different frequency bands. For example, the different wireless access technologies may include a wireless LAN (eg, IEEE 802.11), a cellular network (eg, LTE), and the like. In addition, the different frequency bands may include a super high frequency (SHF) (eg 2.5 GHz, 5 Ghz) band and a millimeter wave (eg 60 GHz) band.
- SHF super high frequency
- the storage unit 1330 may store data such as a basic program, an application program, and setting information for the operation of the terminal.
- the storage unit 1330 may store information related to a second access node that performs wireless communication using a second wireless access technology.
- the storage unit 1330 may provide stored data at the request of the controller 1340.
- the controller 1340 may control overall operations of the terminal.
- the controller 1340 may transmit and receive a signal through the baseband processor 1320 and the RF processor 1310.
- the controller 1340 records and reads data in the storage 1340.
- the controller 1340 may include at least one processor.
- the controller 1340 may include a communication processor (CP) for performing control for communication and an application processor (AP) for controlling a higher layer such as an application program.
- CP communication processor
- AP application processor
- the controller 1340 may control the terminal to perform the operation and procedure of the illustrated terminal.
- the controller 1340 may obtain system information from the base station. In addition, the controller 1340 may check whether the second DRX configuration information is included in the system information. That is, the controller 1340 may determine whether the system information includes the second DRX-related first information and the paging-related second parameter (nB ′ value).
- the controller 1340 may perform an RRC connection establishment process.
- the controller 1340 may transmit a request message.
- the request message may include, for example, an attach request message or a TAU request message, and the controller 1340 may include the first DRX-related second information and the second DRX-related second information and transmit the same to the MME.
- the controller 1340 may receive a response message (for example, an ATTACH ACCEPT or TAU ACCEPT message) corresponding to the request message.
- a response message for example, an ATTACH ACCEPT or TAU ACCEPT message
- the controller 1340 may determine whether the response message includes the third DRX-related third information (Allowed eDRX parameter).
- the second DRX-related third information (Allowed eDRX parameter) may include information indicating whether the MME supports the second DRX (eDRX) or second DRX period information (eDRX period information) to be applied by the terminal. have.
- the controller 1340 may control the second DRX-related third information. The process of determining whether or not is included may be omitted.
- the controller 1340 may perform an RRC connection release process.
- the controller 1340 releasing the RRC connection may operate by applying a second DRX (eDRX).
- eDRX second DRX
- the controller 1340 may derive the second DRX cycle T ′ and the first DRX cycle T and determine the PHF and the PF by using the above-described method.
- the above step may be performed in advance before RRC connection release.
- the controller 1340 may attempt to receive its paging message at the paging reception timing indicated by the determined PHF and PF.
- the controller 1340 is not broadcasting the second DRX-related first information and the paging-related second parameter nB ⁇ , or the MME transmits the second DRX-related third information (Allowed eDRX parameter). If not, only the first DRX process may be performed.
- FIG. 14A illustrates a block configuration of a base station according to the present invention.
- the base station includes an RF processor 1410, a baseband processor 1420, a backhaul communication unit 1430, a storage unit 1440, and a controller 1450.
- the RF processor 1410 may perform a function for transmitting and receiving a signal through a wireless channel such as band conversion and amplification of a signal. That is, the RF processor 1410 up-converts the baseband signal provided from the baseband processor 1420 into an RF band signal and transmits the same through an antenna, and transmits an RF band signal received through the antenna to a baseband signal. Can be downconverted to
- the RF processor 1410 may include a transmission filter, a reception filter, an amplifier, a mixer, an oscillator, a DAC, an ADC, and the like. In FIG. 9, only one antenna is illustrated, but the first access node may include a plurality of antennas.
- the RF processor 1410 may include a plurality of RF chains. In addition, the RF processor 1410 may perform beamforming. For the beamforming, the RF processor 1410 may adjust the phase and magnitude of each of the signals transmitted and received through a plurality of antennas or antenna elements.
- the baseband processor 1420 may perform a baseband signal and bit string conversion function according to a physical layer standard of the first wireless access technology. For example, during data transmission, the baseband processor 1420 may generate complex symbols by encoding and modulating a transmission bit string. In addition, when receiving data, the baseband processor 1420 may restore the received bit string by demodulating and decoding the baseband signal provided from the RF processor 1410. For example, according to the OFDM scheme, during data transmission, the baseband processor 1420 generates complex symbols by encoding and modulating a transmission bit stream, maps the complex symbols to subcarriers, and then executes an IFFT operation and OFDM insertion may be used to configure OFDM symbols.
- the baseband processor 1420 divides the baseband signal provided from the RF processor 1410 in OFDM symbol units, restores signals mapped to subcarriers through an FFT operation, and demodulates the demodulated signal.
- the reception bit string may be restored by decoding.
- the baseband processor 1420 and the RF processor 1410 may transmit and receive signals as described above. Accordingly, the baseband processor 1420 and the RF processor 1410 may be referred to as a transmitter, a receiver, a transceiver, a communication unit, or a wireless communication unit.
- the backhaul communication unit 1430 may provide an interface for communicating with other nodes in the network. That is, the backhaul communication unit 1430 converts a bit string transmitted from the main base station to another node, for example, an auxiliary base station, a core network, etc. into a physical signal, and converts a physical signal received from the other node into a bit string. I can convert it.
- the storage unit 1440 may store data such as a basic program, an application program, and setting information for the operation of the main station.
- the storage unit 1440 may store information on a bearer allocated to the connected terminal, a measurement result reported from the connected terminal, and the like.
- the storage unit 940 may store information that is a criterion for determining whether to provide or terminate multiple connections to the terminal.
- the storage unit 1440 may provide stored data according to a request of the controller 1450.
- the controller 1450 may control overall operations of the main station. For example, the controller 1450 may transmit and receive a signal through the baseband processor 1420 and the RF processor 1410 or through the backhaul communication unit 1430. In addition, the controller 1450 records and reads data in the storage unit 1440. To this end, the controller 1450 may include at least one processor. According to an embodiment of the present disclosure, the controller 1450 may include a multiple connection controller 1452 performing control for providing multiple connections to a terminal. For example, the controller 1450 may control to perform the operations and procedures of the illustrated base station.
- the controller 1450 may determine whether the base station supports the second DRX.
- the controller 1450 may broadcast system information. If the base station supports the second DRX, the controller 1450 may control the first DRX-related first information and paging-related first parameter as the first DRX configuration information, as well as the second DRX-related first information and paging-related second parameter. System information including the (nB ⁇ ) can be broadcast to the terminal.
- the controller 1450 may broadcast system information including the second DRX configuration information when all the base stations and the MME constituting the TA to which the base station belongs include the second DRX (eDRX). have.
- the controller 1450 may broadcast system information including only the first DRX configuration information. If the base station does not support the second DRX, the controller 1450 may operate according to the first DRX.
- the controller 1450 may receive paging for a specific terminal from the MME.
- controller 1450 may determine whether paging information includes third DRX-related third information (allowed eDRX parameter).
- the controller 1450 may remove a smaller value of the first DRX-related first information (default DRX) and the first DRX-related second information (UE specific DRX value). It can be determined by 1 DRX cycle T. In addition, the controller 1450 may determine the second DRX cycle information indicated by the second DRX-related third information included in the paging information as the second DRX cycle.
- the controller 1450 may convert a small value (or a large value) of the second DRX-related first information and the second DRX-related third information (allowed eDRX parameter) received from the MME into the second DRX (eDRX period) T ′. You can decide.
- the controller 1450 may determine a smaller value of the first DRX-related first information (default DRX) and the first DRX-related second information (UE specific DRX value). It may be determined as the first DRX period T.
- the controller 1450 may check whether the second information related to the second DRX is included in the paging message. Therefore, when the second DRX-related second information is included in the paging message, the controller 1450 may determine the second DRX-related second information as a second DRX cycle. Alternatively, the controller 1450 may determine a small value (or a large value) of the second DRX-related first information and the second DRX-related second information (UE specific eDRX value) as the second DRX (eDRX) period T ′. have. In addition, the controller 1450 may determine a smaller value of the first DRX-related first information (default DRX) and the first DRX-related second information (UE specific DRX value) as the first DRX period T.
- the controller 1450 may calculate the PHF, the PF, and the PO based on at least one of the second DRX cycle T ′ and the first DRX cycle T to transmit paging. If the paging information received from the MME does not include the second DRX-related third information (first method) or the second DRX-related second information (second method), the controller 1450 uses only the first DRX cycle. If the paging information received from the MME includes the second DRX-related third information (first method) or the second DRX-related second information (second method), the second DRX cycle (T). Paging may be transmitted based on the ⁇ ) and the first DRX cycle (T).
- the controller 1450 may repeatedly transmit paging in a specific period PTW according to the first DRX cycle. In this case, even when the second DRX cycle arrives, a time point at which the first DRX cycle starts may change according to the terminal.
- 14B is a diagram illustrating a configuration of an MME according to an embodiment of the present invention.
- the MME may include a transceiver 1470, a controller 1471, and a storage 1472.
- the transceiver 1470 may transmit and receive a signal with another network entity.
- the transceiver 1470 may receive a request message from the terminal, transmit a response message to the terminal, and transmit a paging message to the base station.
- the controller 1471 may receive a request message from the terminal.
- the controller 1471 may determine whether a request message (ATTACH REQUEST or TAU REQUEST message) including the second DRX-related second information (UE specific eDRX) is received from the terminal.
- a request message ATTACH REQUEST or TAU REQUEST message
- the second DRX-related second information UE specific eDRX
- the controller 1471 may determine whether the MME can support the second DRX (eDRX).
- the controller 1471 may omit the above step.
- the controller 1471 may transmit a response message to the terminal.
- the control unit 1471 may include the second DRX-related third information (Allowed eDRX parameter) in the response message and transmit the same to the terminal.
- the controller 1471 may include the second DRX-related second information in the response message and transmit the same to the terminal.
- the controller 1471 may additionally provide second DRX-related third information (allowed eDRX parameter) to the base station together with paging in the first method. That is, the controller 1471 may transmit paging including the third DRX-related third information to the base station.
- the controller 1471 may additionally provide second base station-related second information (UE specific eDRX value) together with paging. That is, the controller 1471 may transmit paging including the second DRX related second information to the base station.
- the controller ( 1471 may perform an operation according to the first DRX. That is, the controller 1471 may transmit a response message to the terminal and transmit a paging message including the first DRX-related second information to the base station.
- a modification period may be set in a terminal operating as a DRX, and when the system information is updated in the m + 1th modification period, the base station pages the change of the system information in the previous modification period. The message may be informed to the terminal.
- the period of the DRX may be extended to be longer than the maximum value of the modification section, and the terminal may not receive the paging in the previous modification section. Therefore, there is a need for a method of notifying whether system information has changed.
- 15 is a diagram illustrating a process of changing system information.
- System information broadcast by the base station may be changed based on a modification period. Except for some system information, the base station may broadcast the newly changed system information from the start of every modification period. In addition, the base station may inform the terminals that the changed system information will be broadcast from the next modification period in the modification period before the newly changed system information is broadcast. For example, if the changed system information is broadcasted from the n + 1th modification period 1520, the base station is informed that the system information is changed from the next modification period in the immediately preceding nth modification period. It can inform the terminals.
- the base station may inform whether the system information is changed by using a paging message, and the terminal should receive paging at least once within a modification period to confirm whether the system information has been changed.
- the system information change indicator (systemInfoModification IE) is included in the paging message, it may mean that newly updated system information is transmitted from the next period of the modification period in which the paging is transmitted.
- the system information change indicator may be configured with 1 bit.
- the base station may also increase the system information change related information (hereinafter, may be used in combination with terms such as systemInfoValueTag and valuetag) included in SIB1 by one.
- the system information change related information (systemInfoValueTag) indicates whether the system information stored by the terminal camped on again in the out-of coverage is the same as the system information currently being broadcast. Can be used to determine.
- the terminal may determine whether to change the system information by using a paging message or systemInfoValueTag of SIB1.
- the terminal may not receive paging within the modification period. In this case, the terminal cannot check whether the system information is newly updated. In addition, when the system information is changed, the configuration information for the paging message is changed, the terminal may not receive a paging message later. Therefore, there is a need for a solution to this.
- the on-demand SIB1 checking method is applied to update the system information using the change related information.
- a change of system information may be instructed through a first system information change indicator (systemInfoModification-DRX) for a terminal operating as a first DRX, and a second system information change indicator for a terminal operating as a second DRX.
- systemInfoModification-eDRX A method of instructing change of the first system information through
- the paging message may be transmitted through all possible PFs and POs of all possible PHFs after the m + 1th modification period. have.
- the base station does not transmit a separate paging message for the second DRX (eDRX) terminal.
- the terminal triggers an RRC connection, the terminal transmits the SIB1.
- the system information change related information (ValueTag information) included in the information may be checked to determine whether the system information is updated.
- PO refers to a subframe that transmits a paging message in the PF
- the base station can transmit a paging message in the PO of the PF, in the present invention PF and PO, PF / PO, PF or PO Can be expressed as being able to send a paging message.
- system information required for receiving a paging message to the terminal may be defined as first system information.
- first system information In order to indicate whether to update the SI, when a paging message is used, a messaging message needs to be transmitted for a long time. Therefore, in order to reduce signaling overhead caused by this, most system information is updated when the RRC connection of the UE is triggered. Follow the instructions for using change information.
- system information other than the first system information may be defined as the second system information.
- the first system information may include paging message reception and mobility-related system information.
- the first system information may include cell access related information (CellAccessRelatedInfo), paging control channel configuration information (PCCH) -config, cell list information (intraFreqNeighCellList), and the like.
- the second system information may include system information related to RRC connection configuration, for example, access blocking configuration information (AC-BarringConfig), random access control channel configuration information (random access control channel (RACH) -config), and the like. It may include.
- the base station When the first system information is updated (updated) in the m + 1th modification period, the base station is capable of all possible PFs in the mth modification period for the first DRX (existing DRX) terminal. Paging messages can be sent via the PO. In addition, the base station may transmit a paging message through all possible POs of all possible PFs of all possible PHFs after the modification period MP [m + 1] for the second DRX (eDRX) terminal.
- a DRX parameter may be introduced to control the number of possible PHFs, possible PFs, and possible POs.
- the configurable parameters may be independently set for a parameter for a first DRX (existing DRX) and a parameter for a second DRX (eDRX). Therefore, the PF and PO for the first DRX (formerly DRX) and the PF and PO for the second DRX (eDRX) may be set in different radio frames or subframes.
- the configurable parameter may include a paging related first parameter nB.
- the paging-related first parameter (nB) for the existing PF and PO the paging-related second parameter (nB ⁇ ) for the PF and PO applied to the second DRX (eDRX), and the paging-related third for the PHF
- the parameters nB ⁇ can be defined individually. In the present invention, one of the following signaling options may be used.
- the base station may transmit a first parameter related to paging (nB) and first DRX related information (default DRX cycle) through SIB2, and may transmit second DRX related first information through SIBx.
- nB paging
- first DRX related information default DRX cycle
- the terminal may derive the PHF by using the first parameter nB related to paging and the first information related to the first DRX cycle (default DRX cycle), and the first information nB related to the paging and the first information related to the first DRX ( PF and PO can be derived using the default DRX cycle.
- Case 1 is characterized by applying the same paging-related first parameter nB to the first DRX (existing DRX) and the second DRX (eDRX), and has a disadvantage in that the number of PHFs cannot be optimized.
- the base station may transmit a paging related first parameter nB and a first DRX related first information (default DRX cycle) through SIB2, and a paging related second parameter nB ⁇ through SIBx, 2 DRX-related first information can be transmitted.
- the terminal may derive the PHF using the second parameter nB ⁇ related to paging and the first information related to the second DRX. Also, the terminal may derive the PF and the PO using the first parameter nB related to the paging and the first information related to the first DRX cycle.
- the number of PHFs may be optimized by appropriately adjusting the paging related second parameter (nB ⁇ value).
- the number of PFs cannot be optimized.
- Case 2-2 The base station may transmit paging related first parameter nB, first DRX related first information (default DRX cycle) through SIB2, paging related second parameter nB ⁇ through SIBx, The second DRX related first information may be transmitted.
- the terminal may derive the PHF using the second parameter nB ⁇ related to paging and the first information related to the second DRX.
- the terminal may derive the PF and the PO using the paging related second parameter nB ⁇ and the first DRX related first information (default DRX cycle for eDRX UE).
- the base station may transmit paging related first parameter nB and first DRX related first information (default DRX cycle) through SIB2, and paging related second parameter nB ⁇ and paging related agent through SIBx. 3 parameters nB ⁇ , and the first information related to the second DRX may be transmitted.
- the terminal may derive the PHF using the second parameter nB ⁇ related to paging and the first information related to the second DRX.
- the terminal may derive the PF and the PO using the paging related third parameter nB ⁇ and the first DRX related first information (default DRX cycle for eDRX UE).
- the number of PHFs may be optimized by appropriately adjusting the second parameter (nB ⁇ value) related to paging.
- the base station When the second system information is updated in the m + 1th modification period, the base station passes through all possible POs of all possible PFs in the mth modification period for the first DRX (existing DRX) terminal. Paging message can be sent. However, the base station may not transmit a separate paging message for the second DRX (eDRX) terminal. Instead, when the second DRX (eDRX) UE needs an actual RRC connection, the second DRX (eDRX) terminal acquires the MIB and SIB1, checks the system information change related information (systemInfoValueTag information) included in SIB 1, and confirms whether the system information is updated, You can update the information.
- systemInfoValueTag information system information change related information
- 16A is a diagram illustrating a method of notifying a terminal of changed system information according to a second embodiment of the present invention.
- a terminal operating by applying a second DRX may perform paging monitoring only on the PHF 1611 based on Hyper SFN.
- the terminal may receive paging in the PF and PO derived by applying an existing or separate DRX parameter in the PHF.
- SI update (or update) may occur in a time interval 1612 that is not a PHF (1613). If the SI updated from the m + 1th modification period (MP) 1615 is broadcast, the base station may inform the UEs of the SI update by using paging in the mth modification interval (MP) 1614 (1616). .
- the base station may operate differently according to the type of updated system information.
- the base station may transmit a paging message indicating the update of the first system information in the extended modification period.
- the base station notifies the updating of the first system information in the PO of the PF in the PHF for a certain period, for example, m + x-th modification period (MP) 1617 in the coming PHF 1611 It may transmit (1618).
- MP x-th modification period
- PF and PO in the PHF may be derived by applying an existing or separate DRX parameter (1619).
- the first system information may include paging message reception and mobility-related system information.
- the first system information includes cell connection related information (CellAccessRelatedInfo), paging control channel setting information (PCCH-config), cell list information (intraFreqNeighCellList),... And the like.
- the reason why the first system information is updated as soon as possible using paging is because the standby mode terminal is related to paging reception and mobility that should be kept up to date.
- the second system information may be checked for system information change related information (ValueTag information) included in SIB1 and may be updated.
- the second system information may include system information related to RRC connection configuration. For example, the access barring configuration information (AC-BarringConfig), random access control channel configuration information (RACH-config),... And the like.
- the second system information does not need to be kept up-to-date until the actual terminal attempts to connect. Accordingly, the base station may inform whether to update the second system information by using the SIB1 without informing the paging whether to update the second system information.
- Representative first system information is paging control channel configuration information (pcch-config IE).
- the information may be included in the SIB2 and broadcasted.
- the pcch-config IE may include configuration information as shown in Table 1 below.
- the default paging cycle may indicate a cell specific paging cycle.
- the paging related first parameter nB is a variable used to derive a paging frame (PF).
- a base station provides a machine type physical downlink control channel (MPDCCH) and a paging message for instructing paging to expand a service area.
- MPDCCH machine type physical downlink control channel
- a plurality of narrowbands may be repeatedly transmitted, and configuration information related thereto may be included in pcch-config.
- Paging narrowband may be used to indicate the narrowband (narrowband) used for paging, in consideration of repetitive transmission, the range of the paging-related first parameter (nB value) can be extended.
- the base station broadcasts that the SI update is necessary by using a paging message.
- the SIB1 when the subframe bitmap related information (fdd-DownlinkOrTddSubframeBitmapLC-r13) and the hopping related information (si-HoppingConfigCommon-r13) included in the SIB1 are changed, an SI update is performed using a paging message. And broadcasting as necessary.
- the fdd-DownlinkOrTddSubframeBitmapLC-r13 may include subframe information that can be used by a terminal to which the MTC technology is applied. Since the paging message delivered to the MTC terminal is transmitted only in the subframe, it is information required for the terminal to receive the paging message.
- si-HoppingConfigCommon-r13 may indicate whether the SI message and the paging message are frequency hopping (frequency shift in message transmission). Without the information, the terminal should perform blind decoding on all possible frequencies. Therefore, the terminal is information necessary for receiving a paging message.
- 16B is a view illustrating a correction section according to a second embodiment of the present invention.
- FIG. 16B is a diagram for describing a method of extending a modification section to receive paging reception even when a very long DRX cycle is applied.
- the modification period may be extended so that at least one DRX timing may be included in one modification period 1621. That is, the modification period 1621 may be set longer than the second DRX period 1620.
- the paging 1622 for notifying the change of the SI information may be transmitted at the paging time point during the extended modification period (Modification period), at least one of which can be received by the terminal (1623).
- the modification period value may be provided to the terminal through system information (eg, SIB2).
- SIB2 system information
- the correction section provided at this time may be operated separately from the existing correction section. Accordingly, in the present invention, when the correction section is operated separately, the existing correction section may be referred to as a first modification section and an extended modification section as a second modification section.
- 17 is a diagram illustrating a terminal operation according to a second embodiment of the present invention.
- step S1705 the power of the terminal may be turned on or the tracking area (TA) may be changed.
- the UE may acquire system information from the base station in step S1710.
- the terminal acquiring the system information may check whether the second DRX configuration information is included in the system information in step S1715.
- the terminal may determine whether the system information includes the second DRX-related first information and the paging-related second parameter (nB ′ value).
- the second DRX configuration information (or the second DRX parameter value (eDRX parameter value)) included in the SIBx may be different, that is, in case of case 1, the first information related to the second DRX, In case 2, the first DRX-related first information, paging-related second parameter nB ⁇ , and in case 3, the second DRX-related first information, paging-related second parameter nB ⁇ , and paging-related third The parameter nB ⁇ may be included.
- the UE may perform an RRC connection establishment process in step S1720.
- the terminal may transmit a request message to the MME in step S1725.
- the UE prefers to apply the second DRX (eDRX), or if the UE supports the second DRX, the UE and the first DRX-related second information (UE specific DRX) in the request message (ATTACH REQUEST or TAU REQUEST message)
- the second DRX related second information (UE specific eDRX value) may be included and transmitted to the MME.
- the first DRX-related second information may include first DRX period information preferred by the terminal
- the second DRX-related second information may include second DRX period information preferred by the terminal.
- the period information preferred by the terminal may mean period information determined by the terminal to be applied.
- the UE may receive a response message (ATTACH ACCEPT or TAU ACCEPT message) corresponding to the request message from the MME.
- a response message ATTACH ACCEPT or TAU ACCEPT message
- the terminal may determine whether the third DRX-related third information (Allowed eDRX parameter) is included in the message in step S1735.
- the second DRX-related third information (Allowed eDRX parameter) may include information indicating whether the MME supports the second DRX (eDRX) or second DRX period information (eDRX period information) to be applied by the terminal. have.
- the UE may perform an RRC connection release procedure in operation S1740.
- the terminal that has released the RRC connection may operate by applying the second DRX (eDRX) in step S1745.
- the terminal may derive the second DRX cycle (T ⁇ ) and the first DRX cycle (T) by using the method described above in step S1750, and determine the PHF and PF.
- the above step may be performed in advance before RRC connection release.
- the terminal may attempt to receive its paging message at the paging reception timing indicated by the determined PHF and PF.
- the modification interval can be extended so that the paging message can be received.
- the modification section may be extended to include at least one second DRX timing in one modification section, and the terminal may receive paging at least one of the modification sections.
- the paging message may include a second system information change indicator, which is an indicator indicating when the first system information is updated.
- the terminal may receive the first system information currently being broadcast.
- the terminal may trigger an RRC connection in step S1760.
- the UE may sequentially receive the MIB and system information (eg, SIB1, SIBx) in step S1765.
- system information eg, SIB1, SIBx
- the UE may check system information change related information (systemInfoValueTag or systemInfoValueTagExt value) in SIB1 in step S1770.
- systemInfoValueTag or systemInfoValueTagExt value systemInfoValueTagExt value
- the terminal may determine whether the stored value and the value of the identified information (IE) are different in operation S1775.
- the terminal does not need to update the second system information.
- the terminal may receive the second system information currently being broadcast by the base station in step S1780.
- step S1715 the base station is not broadcasting second DRX-related first information and paging-related second parameter nB ⁇ , or in step S1735, the MME transmits second DRX-related third information (Allowed eDRX parameter). If not, the terminal may perform only the first DRX (existing DRX) process in step S1785.
- 18A is a diagram illustrating the operation of a base station in the present invention.
- the base station may determine whether it supports the second DRX (eDRX) in step S1810.
- the base station may broadcast system information in step S1811. If the base station supports the second DRX, the base station is not only the first DRX-related first information and paging-related first parameter that is the first DRX (existing DRX) configuration information, but also the second DRX-related first information and paging-related second System information including the parameter nB ⁇ may be broadcast to the terminal.
- the second DRX-related first information in case 1, the second DRX-related first information, in case 2, the second DRX-related first information, the paging-related second parameter nB ⁇ , and in case 3, the second DRX-related first information.
- 1 information, a paging-related second parameter nB ⁇ , and a paging-related third parameter nB " may be included.
- the base station may broadcast system information including only the first DRX (existing DRX) configuration information in step S1812. If the base station does not support the second DRX, it may operate according to the first DRX as described in FIG. 4, and detailed description thereof will be omitted.
- the base station may determine whether the system information is updated in step S1813.
- the base station may determine whether the updated system information includes the first system information in step S1814.
- the base station may derive the PHF, PF, and PO in step S1815.
- the base station may transmit a paging message indicating whether to update the SI to the terminal in step S1816.
- the base station may transmit a paging message including a second system information change indicator indicating whether to update SI based on the calculated PHF, PF, and PO to terminals operating by applying a second DRX (eDRX). That is, the base station may transmit a paging message including the second system information change indicator to the terminal at the paging time point in the modification period.
- eDRX second DRX
- the base station may increase the systemInfoValueTag and the second system information change related information (hereinafter, may be used in combination with systemInfoValueTagExt) by one in step S1817.
- the base station may increase the systemInfoValueTag value by 1, and if wraparound occurs, then the systemInfoValueTagExt may be increased by one.
- the base station selects the systemInfoValueTag and systemInfoValueTagExt values included in the system information change related information. Can be increased by Or, the base station may increase the systemInfoValueTag value by 1 and if wraparound occurs, then, the systemInfoValueTagExt may be increased by 1.
- the base station may include the system information change related information (IE value) changed in step S1818 to broadcast system information (eg, SIB1).
- 18b illustrates another operation of a base station in the present invention.
- the base station may decide to update system information in step S1820. At this time, the base station may decide to update some or all of the system information.
- the base station may determine whether the base station supports the second DRX (extended DRX period) in step S1821.
- the base station may perform an SI update according to the first DRX (existing technology) in step S1822.
- the base station may determine whether the MTC technology supports a coverage area extension (Coverage Extension) in step S1823.
- a coverage area extension (Coverage Extension)
- the base station may determine whether the system information changed in step S1824 includes at least paging control channel configuration information (pcch-config).
- the base station informs the paging message or the PDCCH of the second system information change indicator (or SI update) to inform the paging message whether the SI is updated.
- Indicator can be included and transmitted to the terminal.
- the base station may skip step S1825.
- the base station may broadcast the updated system information in the next second DRX acquisition period in step S1826.
- the base station hopping the system information changed in step S1827 (pcch-config), subframe bitmap-related information (fdd-DownlinkOrTddSubframeBitmapLC-r13), hopping It may be determined whether at least one of the related information (si-HoppingConfigCommon-r13) is included.
- the base station informs the paging message or (M) PDCCH of the second system information change indicator (SI) in order to inform the paging message whether the SI is updated.
- Update indicator may be included and transmitted to the terminal.
- the base station may skip step S1828.
- the base station may broadcast the updated system information in the next second DRX acquisition period in step S1829.
- FIG. 19 shows a block configuration of a terminal according to the present invention.
- the terminal includes a radio frequency (RF) processor 1910, a baseband processor 1920, a storage 1930, and a controller 1940.
- the RF processor 1910 may perform a function for transmitting and receiving a signal through a wireless channel such as band conversion and amplification of a signal. That is, the RF processor 1910 up-converts the baseband signal provided from the baseband processor 1920 to an RF band signal and transmits the same through an antenna, and transmits an RF band signal received through the antenna to a baseband signal.
- the RF processor 810 may include a transmission filter, a reception filter, an amplifier, a mixer, an oscillator, a digital to analog convertor (DAC), an analog to digital convertor (ADC), and the like. .
- the terminal may include a plurality of antennas.
- the RF processor 810 may include a plurality of RF chains.
- the RF processor 810 may perform beamforming. For the beamforming, the RF processor 810 may adjust the phase and magnitude of each of the signals transmitted and received through a plurality of antennas or antenna elements.
- the baseband processor 1920 may perform a baseband signal and bit string conversion function according to a physical layer standard of the system.
- the baseband processor 1920 may generate complex symbols by encoding and modulating a transmission bit stream.
- the baseband processor 1920 may restore the received bit string by demodulating and decoding the baseband signal provided from the RF processor 1910.
- OFDM orthogonal frequency division multiplexing
- the baseband processor 1920 in accordance with an orthogonal frequency division multiplexing (OFDM) scheme, during data transmission, the baseband processor 1920 generates complex symbols by encoding and modulating a transmission bit stream and maps the complex symbols to subcarriers. After that, OFDM symbols may be configured through inverse fast Fourier transform (IFFT) operation and cyclic prefix (CP) insertion.
- IFFT inverse fast Fourier transform
- CP cyclic prefix
- the baseband processor 1920 divides the baseband signal provided from the RF processor 1910 in OFDM symbol units and performs the signals mapped to the subcarriers through a fast Fourier transform (FFT) operation. After reconstruction, the reception bit stream may be reconstructed by demodulation and decoding.
- the baseband processor 1920 and the RF processor 1910 may transmit and receive signals as described above. Accordingly, the baseband processor 1920 and the RF processor 1910 may be referred to as a transmitter, a receiver, a transceiver, or a communicator. Furthermore, at least one of the baseband processor 1920 and the RF processor 1910 may include a plurality of communication modules to support a plurality of different radio access technologies.
- the baseband processor 1920 and the RF processor 1910 may include different communication modules to process signals of different frequency bands.
- the different wireless access technologies may include a wireless LAN (eg, IEEE 802.11), a cellular network (eg, LTE), and the like.
- the different frequency bands may include a super high frequency (SHF) (eg 2.5 GHz, 5 Ghz) band and a millimeter wave (eg 60 GHz) band.
- SHF super high frequency
- the storage unit 830 may store data such as a basic program, an application program, and setting information for the operation of the terminal.
- the storage unit 1930 may store information related to an access node performing wireless communication using a second wireless access technology.
- the storage unit 1930 may provide stored data according to a request of the controller 1940.
- the controller 1940 may control overall operations of the terminal. For example, the controller 1940 may transmit and receive a signal through the baseband processor 1920 and the RF processor 1910. In addition, the controller 1940 records and reads data in the storage 1940. To this end, the controller 1940 may include at least one processor. For example, the controller 1940 may include a communication processor (CP) for performing control for communication and an application processor (AP) for controlling a higher layer such as an application program. According to an embodiment of the present disclosure, the controller 1940 may control the terminal to perform an operation and a procedure of the illustrated terminal.
- CP communication processor
- AP application processor
- the controller 1940 may obtain system information from the base station.
- the controller 1940 may determine whether the second DRX configuration information is included in the system information.
- the terminal may determine whether the system information includes the second DRX-related first information and the paging-related second parameter (nB ′ value).
- the second DRX configuration information (or the second DRX parameter value (eDRX parameter value)) included in the SIBx may be different, that is, in case of case 1, the first information related to the second DRX, In case 2, the first DRX-related first information, paging-related second parameter nB ⁇ , and in case 3, the second DRX-related first information, paging-related second parameter nB ⁇ , and paging-related third The parameter nB ⁇ may be included.
- the controller 1940 may perform an RRC connection establishment process. After the RRC connection is completed, the controller 1940 can transmit a request message to the MME. If the UE prefers to apply the second DRX (eDRX) or if the UE supports the second DRX, the controller 1940 may request the first DRX-related second information (UE specific DRX) and the second DRX-related agent in the request message. 2 information (UE specific eDRX value) can be included and transmitted to the MME.
- eDRX second DRX
- 2 information UE specific eDRX value
- controller 1940 may receive a response message corresponding to the request message from the MME.
- the controller 1940 may determine whether the third DRX-related third information (Allowed eDRX parameter) is included in the message.
- the second DRX-related third information (Allowed eDRX parameter) may include information indicating whether the MME supports the second DRX (eDRX) or second DRX period information (eDRX period information) to be applied by the terminal. have.
- the controller 1940 may perform an RRC connection release process at step.
- the controller 1940 releasing the RRC connection may operate by applying a second DRX (eDRX).
- eDRX second DRX
- the controller 1940 may derive the second DRX cycle T ′ and the first DRX cycle T by using the above-described method, and determine the PHF and the PF.
- the above step may be performed in advance before RRC connection release.
- controller 1940 may attempt to receive its paging message at the paging reception timing indicated by the determined PHF and PF.
- the reception interval can be extended so that the paging message can be received.
- the modification section may be extended to include at least one second DRX timing in one modification section, and the terminal may receive paging at least one of the modification sections.
- the paging message may include a second system information change indicator, which is an indicator indicating when the first system information is updated.
- the controller 1940 may receive the first system information that is currently being broadcast.
- controller 1940 may trigger an RRC connection.
- the controller 1940 may sequentially receive the MIB and system information (eg, SIB1 and SIBx).
- MIB and system information eg, SIB1 and SIBx.
- the controller 1940 may check system information change related information (systemInfoValueTag or systemInfoValueTagExt value) in SIB1.
- the controller 1940 may determine whether the stored value and the value of the confirmed information IE are different.
- the controller 1940 does not need to update the second system information.
- the controller 1940 may receive the second system information currently being broadcast by the base station.
- the controller 1940 may perform only the first DRX process.
- 20 is a diagram illustrating a configuration of a base station according to the present invention.
- the base station includes an RF processor 2010, a baseband processor 2020, a backhaul communication unit 2030, a storage unit 2040, and a controller 2050.
- the RF processor 2010 may perform a function for transmitting and receiving a signal through a wireless channel such as band conversion and amplification of a signal. That is, the RF processor 2010 up-converts the baseband signal provided from the baseband processor 2020 to an RF band signal and transmits the same through an antenna, and transmits an RF band signal received through the antenna to a baseband signal. Can be downconverted to
- the RF processor 2010 may include a transmission filter, a reception filter, an amplifier, a mixer, an oscillator, a DAC, an ADC, and the like.
- the first access node may have a plurality of antennas.
- the RF processor 2010 may include a plurality of RF chains.
- the RF processor 2010 may perform beamforming. For the beamforming, the RF processor 2010 may adjust the phase and the magnitude of each of the signals transmitted and received through a plurality of antennas or antenna elements.
- the baseband processor 2020 may perform a conversion function between the baseband signal and the bit string according to the physical layer standard of the first wireless access technology. For example, during data transmission, the baseband processor 2020 may generate complex symbols by encoding and modulating a transmission bit stream.
- the baseband processor 2020 may restore the received bit string by demodulating and decoding the baseband signal provided from the RF processor 2010. For example, according to the OFDM scheme, during data transmission, the baseband processor 2020 generates complex symbols by encoding and modulating a transmission bit stream, maps the complex symbols to subcarriers, and then executes an IFFT operation and OFDM insertion may be used to configure OFDM symbols. In addition, when receiving data, the baseband processor 2020 divides the baseband signal provided from the RF processor 2010 in OFDM symbol units, restores signals mapped to subcarriers through an FFT operation, and demodulates the demodulated signal. The reception bit string may be restored by decoding.
- the baseband processor 2020 and the RF processor 2010 may transmit and receive signals as described above. Accordingly, the baseband processor 2020 and the RF processor 2010 may be referred to as a transmitter, a receiver, a transceiver, a communication unit, or a wireless communication unit.
- the backhaul communication unit 2030 may provide an interface for communicating with other nodes in the network. That is, the backhaul communication unit 2030 converts a bit string transmitted from the main base station to another node, for example, an auxiliary base station, a core network, etc. into a physical signal, and converts a physical signal received from the other node into a bit string. I can convert it.
- the storage unit 2040 may store data such as a basic program, an application program, and setting information for the operation of the main station.
- the storage unit 2040 may store information on a bearer allocated to the connected terminal, a measurement result reported from the connected terminal, and the like. In addition, the storage unit 2040 may store information that is a criterion for determining whether to provide or terminate multiple connections to the terminal.
- the storage unit 2040 may provide stored data according to a request of the controller 2050.
- the controller 2050 may control overall operations of the main station. For example, the controller 2050 may transmit and receive a signal through the baseband processor 2020 and the RF processor 2010 or through the backhaul communication unit 2030. In addition, the controller 2050 records and reads data in the storage 2040. To this end, the controller 2050 may include at least one processor. According to an embodiment of the present disclosure, the controller 2050 may include a multiple connection controller 2052 for performing a control for providing multiple connections to a terminal. For example, the controller 2050 may control the main station to perform operations and procedures of the illustrated base station.
- the controller 2050 may determine whether the base station supports the second DRX (eDRX).
- the controller 2050 may broadcast system information. If the base station supports the second DRX, the control unit 2050 is not only the first DRX-related first information and paging-related first parameter that is the first DRX (existing DRX) configuration information, but also the second DRX-related first information and paging System information including the relevant second parameter nB ⁇ may be broadcast to the terminal.
- the second DRX-related first information in case 1, the second DRX-related first information, in case 2, the second DRX-related first information, the paging-related second parameter nB ⁇ , and in case 3, the second DRX-related first information.
- 1 information, a paging-related second parameter nB ⁇ , and a paging-related third parameter nB " may be included.
- the controller 2050 may broadcast system information including only the first DRX (existing DRX) configuration information.
- the controller 2050 may determine whether system information is updated.
- the controller 2050 may determine whether the updated system information includes the first system information.
- the controller 2050 may derive the PHF, the PF, and the PO.
- the controller 2050 may transmit a paging message indicating whether to update the SI to the terminal.
- the controller 2050 may transmit a paging message including a second system information change indicator indicating whether to update SI based on the calculated PHF, PF, and PO to terminals operating by applying a second DRX (eDRX).
- eDRX second DRX
- the controller 2050 may increase systemInfoValueTag and systemInfoValueTagExt by one. Alternatively, the controller 2050 may increase the systemInfoValueTag value by 1, and if wraparound occurs, the systemInfoValueTagExt may be increased by 1 at that time.
- the controller 2050 may control the systemInfoValueTag and systemInfoValueTagExt included in the system information change related information. You can increase the value by 1. Alternatively, the controller 2050 may increase the systemInfoValueTag value by 1, and if wraparound occurs, then the systemInfoValueTagExt may be increased by one.
- the controller 2050 may broadcast the system information (eg, SIB1) by including the changed system information change related information (IE value).
- the controller 2050 may determine to update the system information. At this time, the controller 2050 may decide to update some or all of the system information.
- the controller 2050 may determine whether the base station supports the second DRX.
- the controller 2050 may perform SI update according to the first DRX.
- the controller 2050 may determine whether the MTC technology supports a coverage area extension (Coverage Extension).
- the controller 2050 may determine whether the changed system information includes at least paging control channel configuration information (pcch-config).
- the controller 2050 may inform the paging message or the PDCCH of a second system information change indicator (or SI update) to inform the paging message whether the SI is updated. Indicator) can be included and transmitted to the terminal.
- the controller 2050 may omit the process of transmitting the second system information change indicator.
- the controller 2050 may broadcast the updated system information in the next second DRX acquisition period.
- the control unit 2050 is to change the system information paging channel configuration information (pcch-config), subframe bitmap related information (fdd-DownlinkOrTddSubframeBitmapLC-r13), hopping It may be determined whether at least one of the related information (si-HoppingConfigCommon-r13) is included.
- the controller 2050 may inform the paging message or (M) PDCCH of the second system information change indicator (SI) in order to inform the paging message whether the SI is updated. Update indicator) may be included and transmitted to the terminal.
- SI second system information change indicator
- the controller 2050 may omit the process.
- the controller 2050 may broadcast the updated system information in the next second DRX acquisition period.
- the present invention proposes another method for determining whether system information is updated when a DRX cycle is set longer than a modification period in order to reduce power consumption.
- the base station When updating the system information (SI update), the base station should inform all of the standby mode terminals of this fact. As mentioned above, this is accomplished through a paging message. Since the base station does not know which standby mode terminal is in its area, it can transmit a paging message during a modification period through all possible POs.
- the modification period may consist of an integer multiple of the first DRX cycle.
- the length of the second DRX cycle may reach several tens of minutes.
- One of the methods for notifying whether system information is updated for the UE to which the second DRX (eDRX) is applied is a method of continuously transmitting a paging message over a second DRX cycle.
- the present invention is characterized in that the base station transmits a paging message only to a part of the HF after a time point of system information update (SI update) occurs for the second DRX (eDRX) terminal. That is, since it is a post notification, the terminal may immediately perform system information reacquisition (SI refresh) upon recognizing the occurrence of system update.
- SI update system information update
- eDRX second DRX
- the base station when the system information SI is updated in the modification interval MP [m + 1], the base station is capable of all possible modifications of the modification interval MP [m] for the first DRX (existing DRX) terminal. All possible POs in the PF can send paging messages.
- the base station may transmit a paging message on all possible POs of all possible PFs of all possible PHFs for a period after the modification period MP [m + 1] for the second DRX (eDRX terminal).
- the paging message may include a second system information change indicator (systemInfoModification2) and system change related information (value tag).
- the reason for introducing the second system change indicator is to instruct the terminal to reacquire system information from the moment of receiving the paging message.
- the terminal that receives the first system change indicator may reacquire system information from the next MP.
- the system change related information (value tag) can be included in the paging message.
- the reason for including the system change related information (value tag) in the paging message is to prevent the terminal that has already acquired the newly updated system information from receiving the paging message again and unnecessarily reacquiring the same system information.
- a DRX parameter may be introduced to control the number of possible PHFs, possible PFs, and possible POs.
- the configurable parameters may be independently set for a parameter for a first DRX (existing DRX) and a parameter for a second DRX (eDRX). Therefore, PF and PO for the first DRX (existing DRX) and PF / PO for the second DRX (eDRX) may be set in different radio frames or subframes.
- the method of setting the DRX parameter is the same as the above-described method (Case 1, 2, 3), and the detailed description thereof is omitted.
- 21 is a diagram illustrating a method of notifying a terminal of changed system information according to a third embodiment of the present invention.
- a terminal to which a second DRX (eDRX) is applied may perform paging monitoring only on the PHF 2111 based on Hyper SFN.
- the terminal may receive paging in the PF and PO derived by applying an existing or separate parameter (DRX parameter) in the PHF.
- SI update a system information update
- MP 2115 a system information update
- the base station updates the system information by using paging in the mth modification period (MP) 2114 (SI). Update) may be informed to the terminals (2116).
- the terminal applying the second DRX is not the PHF during the corresponding time, the terminal does not receive the paging and cannot determine whether to update the system information (SI update).
- the base station performs a system information update (SI update) during a certain period, for example, an m + x-th modification period (MP) 2117 in the coming PHF 2111 after the system information update (SI update).
- the notifying may transmit paging (2118).
- PF and PO in the PHF may be derived by applying an existing or separate parameter (DRX parameter) (2119).
- FIG. 22 is a diagram illustrating a terminal operation according to a third embodiment of the present invention.
- step S2205 the power of the terminal may be turned on or the tracking area (TA) may be changed.
- the terminal may acquire system information from the base station in step S2210.
- the terminal acquiring the system information may determine whether the second DRX configuration information (or the second DRX parameter) is included in the system information in step S2215. Specifically, the terminal may determine whether the system information includes the second DRX-related first information and the paging-related second parameter (nB ′ value).
- the second DRX parameter (eDRX parameter value) included in the SIBx is different. That is, in case 1, the second DRX-related first information, in case 2, the first DRX-related first information, the paging-related second parameter nB ⁇ , and in case 3, the second DRX-related first information Information, a paging-related second parameter nB ⁇ , and a paging-related third parameter nB ".
- the terminal may perform an RRC connection establishment process in step S2220.
- the terminal may transmit a request message to the MME in step S2225.
- the UE prefers to apply the second DRX (eDRX), or if the UE supports the second DRX, the UE and the first DRX-related second information (UE specific DRX) in the request message (ATTACH REQUEST or TAU REQUEST message)
- the second DRX related second information (UE specific eDRX value) may be included and transmitted to the MME.
- the first DRX-related second information may include first DRX period information preferred by the terminal
- the second DRX-related second information may include second DRX period information preferred by the terminal.
- the period information preferred by the terminal may mean period information determined by the terminal to be applied.
- the UE may receive a response message (ATTACH ACCEPT or TAU ACCEPT message) corresponding to the request message from the MME.
- a response message ATTACH ACCEPT or TAU ACCEPT message
- the terminal may determine whether the third DRX-related third information (Allowed eDRX parameter) is included in the message in step S2235.
- the third information related to the second DRX may include information indicating whether the MME supports the second DRX (eDRX) or second DRX (eDRX) period information to be applied by the terminal. .
- the terminal may perform an RRC connection release procedure in step S2240.
- the UE that has released the RRC connection may operate by applying the second DRX (eDRX) in step S2245.
- the terminal may derive the second DRX cycle (T ⁇ ) and the first DRX cycle (T) by using the method described above in step S2250, and determine the PHF and PF.
- the above step may be performed in advance before RRC connection release.
- the terminal may attempt to receive its paging message at the paging reception timing indicated by the determined PHF and PF.
- the terminal may receive the system information from the start of the next modification period (MP). If the paging message includes a second system information change indicator (SystemInfoModification2), and the system information change-related information (value tag) is different from the stored value, the system information is received or paging from the start of the next Repetition Period The system information can be received from the time point of receiving the message. If the second system information change indicator SystemInfoModification2 is stored in the paging message and the system information change related information (value tag) is the same as the stored value, the terminal may not reacquire system information.
- SystemInfoModification2 the system information change indicator
- value tag system information change related information
- the base station is not broadcasting the second DRX-related first information and the paging-related second parameter (nB ⁇ ) in step S2215, or the MME is the second DRX-related third information (Allowed eDRX parameter) in step S2235 If it is not transmitted, the terminal may perform only the first DRX (existing DRX) process in step S2260.
- FIG. 23 is a diagram illustrating the operation of a base station according to the third embodiment of the present invention.
- the base station may determine whether it supports the second DRX (eDRX).
- the base station may broadcast system information in step S2320. If the base station supports the second DRX, the base station is not only the first DRX-related first information and paging-related first parameter that is the first DRX (existing DRX) configuration information, but also the second DRX-related first information and paging-related second System information including the parameter nB ⁇ may be broadcast to the terminal.
- the second DRX-related first information in case 1, the second DRX-related first information, in case 2, the second DRX-related first information, the paging-related second parameter nB ⁇ , and in case 3, the second DRX-related first information.
- 1 information, a paging-related second parameter nB ⁇ , and a paging-related third parameter nB " may be included.
- the base station may broadcast system information including only the first DRX (existing DRX) configuration information in step S2330. If the base station does not support the second DRX, it may operate according to the first DRX as described in FIG. 4, and detailed description thereof will be omitted.
- system information may be updated. If the system information is updated, the base station may derive the PHF, PF and PO in step S2350.
- the base station may transmit a paging message indicating whether to update the SI in step S2360 to the terminal.
- the base station may transmit a paging message including a second system information change indicator indicating whether to update SI based on the calculated PHF, PF and PO to terminals operating by applying a second DRX (eDRX).
- the base station may include a second system information change indicator (systemInfoModification2) and system information change related information (value tag) in the paging message.
- FIG. 24 is a block diagram of a terminal according to a third embodiment of the present invention.
- the terminal may include a radio frequency (RF) processor 2410, a baseband processor 2420, a storage 2430, and a controller 2440.
- RF radio frequency
- the RF processor 2410 may perform a function for transmitting and receiving a signal through a wireless channel such as band conversion and amplification of a signal. That is, the RF processor 2410 up-converts the baseband signal provided from the baseband processor 2420 into an RF band signal and transmits the same through an antenna, and transmits an RF band signal received through the antenna to a baseband signal. Can be downconverted to
- the RF processor 2410 may include a transmission filter, a reception filter, an amplifier, a mixer, an oscillator, a digital to analog convertor (DAC), an analog to digital convertor (ADC), and the like. . In the figure, only one antenna is shown, but the terminal may include a plurality of antennas.
- the RF processor 2410 may include a plurality of RF chains. In addition, the RF processor 2410 may perform beamforming. For the beamforming, the RF processor 2410 may adjust the phase and magnitude of each of the signals transmitted and received through a plurality of antennas or antenna elements.
- the baseband processor 2420 may perform a baseband signal and bit string conversion function according to a physical layer standard of the system. For example, during data transmission, the baseband processor 2420 may generate complex symbols by encoding and modulating a transmission bit string. In addition, when receiving data, the baseband processor 2420 may restore the received bit string by demodulating and decoding the baseband signal provided from the RF processor 2410. For example, according to an orthogonal frequency division multiplexing (OFDM) scheme, during data transmission, the baseband processor 2420 generates complex symbols by encoding and modulating a transmission bit stream, and maps the complex symbols to subcarriers. After that, OFDM symbols may be configured through inverse fast Fourier transform (IFFT) operation and cyclic prefix (CP) insertion.
- OFDM orthogonal frequency division multiplexing
- the baseband processor 2420 divides the baseband signal provided from the RF processor 2410 in OFDM symbol units, and performs the signals mapped to the subcarriers through a fast fourier transform (FFT) operation. After reconstruction, the reception bit stream may be reconstructed by demodulation and decoding.
- FFT fast fourier transform
- the baseband processor 2420 and the RF processor 2410 may transmit and receive signals as described above. Accordingly, the baseband processor 2420 and the RF processor 2410 may be referred to as a transmitter, a receiver, a transceiver, or a communicator. Furthermore, at least one of the baseband processor 2420 and the RF processor 2410 may include a plurality of communication modules to support a plurality of different radio access technologies. In addition, at least one of the baseband processor 2420 and the RF processor 2410 may include different communication modules to process signals of different frequency bands. For example, the different wireless access technologies may include a wireless LAN (eg, IEEE 802.11), a cellular network (eg, LTE), and the like. In addition, the different frequency bands may include a super high frequency (SHF) (eg 2.5 GHz, 5 Ghz) band and a millimeter wave (eg 60 GHz) band.
- SHF super high frequency
- the storage unit 2430 may store data such as a basic program, an application program, and setting information for the operation of the terminal.
- the storage unit 2430 may store information related to a second access node that performs wireless communication using a second wireless access technology.
- the storage unit 2430 may provide the stored data according to a request of the controller 2440.
- the controller 2440 may control overall operations of the terminal.
- the controller 2440 may transmit and receive a signal through the baseband processor 2420 and the RF processor 2410.
- the controller 2440 records and reads data in the storage 2440.
- the controller 2440 may include at least one processor.
- the controller 2440 may include a communication processor (CP) for performing control for communication and an application processor (AP) for controlling a higher layer such as an application program.
- CP communication processor
- AP application processor
- the controller 2440 may control the terminal to perform the operation and procedure of the illustrated terminal.
- the controller 2440 may obtain system information from the base station.
- the controller 2440 having obtained the system information may determine whether the second DRX configuration information (or the second DRX parameter) is included in the system information. In detail, the controller 2440 may determine whether the system information includes the second DRX-related first information and the paging-related second parameter (nB ′ value).
- the second DRX parameter (eDRX parameter value) included in the SIBx is different. That is, in case 1, the second DRX-related first information, in case 2, the first DRX-related first information, the paging-related second parameter nB ⁇ , and in case 3, the second DRX-related first information Information, a paging-related second parameter nB ⁇ , and a paging-related third parameter nB ".
- the controller 2440 may perform an RRC connection establishment process. After the RRC connection is completed, the controller 2440 may transmit a request message to the MME. If the terminal prefers to apply the second DRX (eDRX) or if the terminal supports the second DRX, the control unit 2440 is the first DRX-related second information (UE specific DRX) and the second DRX-related information in the request message; 2 information (UE specific eDRX value) can be included and transmitted to the MME.
- eDRX second DRX
- 2 information UE specific eDRX value
- controller 2440 may receive a response message corresponding to the request message from the MME.
- the controller 2440 may determine whether the response information includes the second DRX-related third information (Allowed eDRX parameter).
- the third information related to the second DRX may include information indicating whether the MME supports the second DRX (eDRX) or second DRX (eDRX) period information to be applied by the terminal. .
- the controller 2440 may perform an RRC connection release process.
- the controller 2440 releasing the RRC connection may operate by applying a second DRX (eDRX).
- eDRX second DRX
- the controller 2440 may derive the second DRX cycle T ′ and the first DRX cycle T and determine the PHF and the PF by using the above-described method.
- the above step may be performed in advance before RRC connection release.
- the controller 2440 may attempt to receive its paging message at the paging reception timing indicated by the determined PHF and PF.
- the controller 2440 may receive system information from the start of the next modification period (MP). If the paging message includes a second system information change indicator (SystemInfoModification2), and the system information change-related information (value tag) is different from the stored value, the controller 2440 is the system information from the start of the next reception period (Repetition Period) System information may be received from the time point of receiving the Paging message or the Paging message. If the second system information change indicator SystemInfoModification2 is stored in the paging message, and the system information change related information (value tag) is the same as the stored value, the controller 2440 may not reacquire system information.
- SystemInfoModification2 the system information change-related information
- the controller 2440 may not reacquire system information.
- the control unit ( 2440 may perform only the first DRX process.
- 25 is a block diagram of a base station according to the third embodiment of the present invention.
- the base station includes an RF processor 2510, a baseband processor 2520, a backhaul communication unit 2530, a storage unit 2540, and a controller 2550.
- the RF processor 2510 may perform a function for transmitting and receiving a signal through a wireless channel such as band conversion and amplification of a signal. That is, the RF processor 2510 up-converts the baseband signal provided from the baseband processor 2520 to an RF band signal and transmits the same through an antenna, and transmits an RF band signal received through the antenna to a baseband signal. Can be downconverted to
- the RF processor 2510 may include a transmission filter, a reception filter, an amplifier, a mixer, an oscillator, a DAC, an ADC, and the like. In the figure, only one antenna is shown, but the first access node may have a plurality of antennas.
- the RF processor 2510 may include a plurality of RF chains. In addition, the RF processor 2510 may perform beamforming. For the beamforming, the RF processor 2510 may adjust the phase and the magnitude of each of the signals transmitted and received through a plurality of antennas or antenna elements.
- the baseband processor 2520 may perform a baseband signal and bit string conversion function according to a physical layer standard of the first wireless access technology. For example, during data transmission, the baseband processor 2520 may generate complex symbols by encoding and modulating a transmission bit stream. In addition, when receiving data, the baseband processor 2520 may restore the received bit string by demodulating and decoding the baseband signal provided from the RF processor 2510. For example, according to the OFDM scheme, during data transmission, the baseband processor 2520 generates complex symbols by encoding and modulating a transmission bit stream, maps the complex symbols to subcarriers, and then executes an IFFT operation and OFDM insertion may be used to configure OFDM symbols.
- the baseband processor 2520 splits the baseband signal provided from the RF processor 2510 in OFDM symbol units, restores signals mapped to subcarriers through an FFT operation, and demodulates the demodulated signal.
- the reception bit string may be restored by decoding.
- the baseband processor 2520 and the RF processor 2510 may transmit and receive signals as described above. Accordingly, the baseband processor 2520 and the RF processor 2510 may be referred to as a transmitter, a receiver, a transceiver, a communication unit, or a wireless communication unit.
- the backhaul communication unit 2530 may provide an interface for communicating with other nodes in the network. That is, the backhaul communication unit 2530 converts a bit string transmitted from the main base station to another node, for example, an auxiliary base station, a core network, etc. into a physical signal, and converts a physical signal received from the other node into a bit string. I can convert it.
- the storage unit 2540 may store data such as a basic program, an application program, and setting information for the operation of the main station.
- the storage unit 2540 may store information on a bearer allocated to the connected terminal, a measurement result reported from the connected terminal, and the like.
- the storage unit 2540 may store information that is a criterion for determining whether to provide or terminate multiple connections to the terminal.
- the storage unit 2540 may provide the stored data according to a request of the controller 2550.
- the controller 2550 may control overall operations of the main base station. For example, the controller 2550 may transmit and receive a signal through the baseband processor 2520 and the RF processor 2510 or through the backhaul communication unit 2530. In addition, the controller 2550 records and reads data in the storage 2540. To this end, the controller 2550 may include at least one processor. According to an embodiment of the present disclosure, the controller 2550 may include a multiple connection controller 2552 for performing a control for providing multiple connections to a terminal. For example, the controller 2550 may control the main station to perform operations and procedures of the illustrated base station.
- the controller 2550 may determine whether the base station supports the second DRX (eDRX).
- the controller 2550 may broadcast system information. If the base station supports the second DRX, the controller 2550 may not only paging first DRX-related first information and paging-related first parameters, which are first DRX (existing DRX) configuration information, but also paging and second DRX-related first information. System information including the relevant second parameter nB ⁇ may be broadcast to the terminal.
- the second DRX-related first information in case 1, the second DRX-related first information, in case 2, the second DRX-related first information, the paging-related second parameter nB ⁇ , and in case 3, the second DRX-related first information.
- 1 information, a paging-related second parameter nB ⁇ , and a paging-related third parameter nB " may be included.
- the controller 2550 may broadcast system information including only the first DRX (existing DRX) configuration information.
- the controller 2550 may derive the PHF, the PF, and the PO.
- the controller 2550 may transmit a paging message indicating whether to update the SI to the terminal.
- the base station may transmit a paging message including a second system information change indicator indicating whether to update SI based on the calculated PHF, PF and PO to terminals operating by applying a second DRX (eDRX).
- the base station may include a second system information change indicator (systemInfoModification2) and system information change related information (value tag) in the paging message.
- the present invention proposes another method for determining whether system information is updated when a DRX cycle is set longer than a modification period in order to reduce power consumption.
- the base station When updating the system information (SI update), the base station should notify all of the standby mode terminals. As mentioned above, this is accomplished through a paging message. Since the base station does not know which standby mode terminal is in its area, it can transmit a paging message during a modification period through all possible POs.
- the modification period may consist of an integer multiple of the first DRX cycle.
- the length of the second DRX cycle may reach several tens of minutes. Since the system information update (SI update) method applied to the general DRX terminal is prior notice, when the UE recognizes the occurrence of the system information update (SI update), the system performs system refresh (SI refresh) in the next modification section (MP). can do. Therefore, in the present invention, the base station checks the system information (for example, SIB1) at some HF after the point of time when the system information update (SI update) occurs for the second DRX (eDRX) terminal to confirm whether the SI is updated. It features. That is, since it is a post notification, the terminal may immediately perform system information reacquisition (SI refresh) upon recognizing the occurrence of a system update (SI update).
- SIB1 system information reacquisition
- the base station when the system information SI is updated in the modification interval MP [m + 1], the base station is capable of all possible modifications of the modification interval MP [m] for the first DRX (existing DRX) terminal. All possible POs in the PF can send paging messages.
- the second DRX (eDRX) terminal may obtain MIB and system information (SIB1) for each PHF and check system information change related information (systemInfoValueTag information) in SIB 1.
- SIB1 system information
- SIB1 system information change related information
- FIG. 26 is a diagram illustrating a method of notifying a terminal of changed system information according to a fourth embodiment of the present invention.
- the terminal to which the second DRX (eDRX) is applied may perform paging monitoring only on the PHF 2611 based on Hyper SFN.
- the terminal may receive paging in the PF and PO derived by applying an existing or separate DRX parameter in the PHF.
- SI update system information update
- time interval 2612 that is not a PHF (2613).
- SI update updated system information
- MP m + 1th modification interval
- the base station updates the system information using paging in the mth modification interval (MP) 2614. Update) may be informed to the terminals (2616).
- the terminal applying the second DRX is not the PHF during the corresponding time, the terminal does not receive the paging and cannot determine whether to update the system information (SI update).
- the base station sequentially receives the MIB and the SIB1 at the coming PHF 2111 after the system information update (SI update), and the system itself stores the system information change related information (systemInfoValueTag value) included in the SIB1. It may be checked whether or not the value matches the current value (2617). At this time, if the system information change-related information (systemInfoValueTag value) included in the newly received SIB1 does not match the value stored by the terminal itself, the terminal considers that the SI update has occurred in a section other than the PHF and is currently broadcasting. The system information can be updated.
- SI update system information update
- systemInfoValueTag may be reused by the second DRX (eDRX) terminal and may define a new systemInfoValueTagExt for a separate eDRX terminal.
- systemInfoValueTag has a value of INTEGER (0..31) (i.e., a value between 0 and 31 and can be incremented by 1 for every SI update. Also, if it exceeds 31, it can return to 0 again.) , systemInfoValueTagExt may have an INTEGER (0..256) value. This is because, in the case of the second DRX (eDRX), it may have a very long DRX cycle, during which a lot of SI updates may occur.
- systemInfoValueTagExt can be incremented by one.
- the systemInfoValueTag value may be reused, but if the value wraps around, the systemInfoValueTagExt value may be increased by one. This method allows you to set the systemInfoValueTagExt value to a lower range of values than previous methods, such as INTEGER (0..15).
- an indicator indicating this may be included in the paging message for the second DRX (eDRX) terminal, and as in the past, new system information may be updated from the next modification section (MP). .
- FIG. 27 is a diagram illustrating a terminal operation according to the fourth embodiment of the present invention.
- step S2705 the power of the terminal may be turned on or the TA (Tracking Area) may be changed.
- the UE may acquire system information from the base station in step S2710.
- the terminal acquiring the system information may check whether the second DRX configuration information is included in the system information in step S2715. In detail, the terminal may determine whether the system information includes the second DRX-related first information (and the paging-related second parameter (nB ′ value)).
- the UE may perform an RRC connection establishment process in step S2720.
- the terminal may transmit a request message to the MME in step S2225.
- the UE prefers to apply the second DRX (eDRX), or if the UE supports the second DRX, the UE and the first DRX-related second information (UE specific DRX) in the request message (ATTACH REQUEST or TAU REQUEST message)
- the second DRX related second information (UE specific eDRX value) may be included and transmitted to the MME.
- the first DRX-related second information may include a first DRX period value preferred by the terminal
- the second DRX-related second information may include a second DRX period value preferred by the terminal.
- the period information preferred by the terminal may mean period information determined by the terminal to be applied.
- the UE may receive a response message (ATTACH ACCEPT or TAU ACCEPT message) corresponding to the request message from the MME.
- a response message ATTACH ACCEPT or TAU ACCEPT message
- the terminal may determine whether the third DRX-related third information (Allowed eDRX parameter) is included in the message in step S2735.
- the third information related to the second DRX may include information indicating whether the MME supports the second DRX (eDRX) or second DRX (eDRX) period information to be applied by the terminal. .
- the UE may perform an RRC connection release procedure in operation S2740.
- the terminal that has released the RRC connection may operate by applying the second DRX (eDRX) in step S2745.
- the terminal may derive the second DRX cycle (T ⁇ ) and the first DRX cycle (T) by using the method described above in step S2750, and determine the PHF and PF.
- the above step may be performed in advance before RRC connection release.
- the terminal may sequentially receive the MIB and the system information SIB1.
- the terminal may check the systemInfoValueTag or systemInfoValueTagExt value included in SIB1 in step S2760.
- the second DRX (EDRX) terminal may check systemInfoValueTag or systemInfoValueTagExt by receiving SIB1 at least once for each T ′ which is a second DRX (eDRX) period.
- the UE may receive SIB1 closest in the time domain to the first PF and PO of the PHF determined according to the second DRX (eDRX) cycle.
- the SIB1 closest to the SIB1 occurring later (or earlier) than the first PF and PO of the PHF may be received.
- the terminal may determine whether the stored value and the checked values of the IEs are different in operation S2765.
- the terminal does not need to update the system information.
- the terminal may receive the system information that the base station is currently broadcasting in step S2770.
- the base station is not broadcasting the second DRX-related first information and the paging-related second parameter (nB ⁇ ) in step S2705, or the MME the second DRX-related third information (Allowed eDRX parameter) in step S2235 If it is not transmitted, the terminal may perform only the first DRX (existing DRX) process in step S2775.
- the idle mode terminal is described, and the operation may be similarly applied to the connected state terminal.
- the connected state terminal may also operate as DRX, and a long DRX cycle and a short DRX cycle may be set in the terminal.
- the terminal may apply a short DRX cycle while data transmission and reception are performed, and may apply a long DRX cycle while data transmission and reception are not performed.
- the long DRX period can be set from 10 ms to 10.24 sec, and may be longer than the modification period.
- the connection state terminal may perform system information checking (SIB1 checking) as follows.
- the terminal establishes an RRC connection with the base station, and the terminal may report whether to support the second DRX (eDRX) to the base station.
- eDRX second DRX
- the base station may set a long DRX cycle such as 10.24 seconds to the terminal supporting the second DRX (eDRX).
- the terminal performs the first operation or the second operation based on the length of the configured DRX cycle.
- the terminal may perform the first operation if the length of the configured long DRX cycle is less than or equal to the first value, and may perform the second operation if the length of the long DRX cycle is less than or equal to the first value.
- the first value may be a fixed value, for example, 2.56 seconds, or may be a specific value set for each cell, for example, a length of a modification period.
- the first operation is as follows.
- the UE may determine whether to change the SI by checking the system information SIB1 at least once every modification period.
- the terminal may determine whether the SI has been changed by checking the first system information SIB1 of the modification period, and if it is determined that the SI has been changed, that is, if the value tag is different from the stored value, the SIBs may be regenerated. You can replace the currently stored values received.
- the second operation is as follows.
- the UE may use a long value of a modification period and a long DRX cycle to check the system information SIB1 at least once per period and determine whether to change the SI. If the system information (SIB1) is checked at a long DRX cycle, the UE may check the system information (SIB1) closest to time onDuration. If it is determined that the SI has changed, that is, the value tag is different from the stored value, the SIBs can be received again to replace the currently stored values.
- 28 is a diagram illustrating an operation of a base station in the present invention.
- the base station may determine whether system information has been updated.
- the base station may increase the systemInfoValueTag and systemInfoValueTagExt by 1 in step S2820.
- the base station may broadcast the system information (SIB1) by including the updated information (IE) in step S2830.
- SIB1 system information
- IE updated information
- 29 shows a block configuration of a terminal according to the present invention.
- the terminal may include a radio frequency (RF) processor 2910, a baseband processor 2920, a storage 2930, and a controller 2940.
- RF radio frequency
- the RF processor 2910 may perform a function for transmitting and receiving a signal through a wireless channel such as band conversion and amplification of the signal. That is, the RF processor 2910 up-converts the baseband signal provided from the baseband processor 2920 to an RF band signal and transmits the same through an antenna, and transmits an RF band signal received through the antenna to a baseband signal. Can be downconverted to
- the RF processor 2910 may include a transmission filter, a reception filter, an amplifier, a mixer, an oscillator, a digital to analog convertor (DAC), an analog to digital convertor (ADC), and the like. . In the figure, only one antenna is shown, but the terminal may include a plurality of antennas.
- the RF processor 2910 may include a plurality of RF chains.
- the RF processor 2910 may perform beamforming. For the beamforming, the RF processor 2910 may adjust the phase and the magnitude of each of the signals transmitted and received through a plurality of antennas or antenna elements.
- the baseband processor 2920 may perform a baseband signal and bit string conversion function according to the physical layer standard of the system. For example, during data transmission, the baseband processor 2920 may generate complex symbols by encoding and modulating a transmission bit string. In addition, when receiving data, the baseband processor 2920 may restore the received bit string by demodulating and decoding the baseband signal provided from the RF processor 2910. For example, according to an orthogonal frequency division multiplexing (OFDM) scheme, during data transmission, the baseband processor 2920 generates complex symbols by encoding and modulating a transmission bit stream and maps the complex symbols to subcarriers. After that, OFDM symbols may be configured through inverse fast Fourier transform (IFFT) operation and cyclic prefix (CP) insertion.
- OFDM orthogonal frequency division multiplexing
- the baseband processor 2920 divides the baseband signal provided from the RF processor 2910 in OFDM symbol units, and performs the signals mapped to the subcarriers through a fast fourier transform (FFT) operation. After reconstruction, the reception bit stream may be reconstructed by demodulation and decoding.
- FFT fast fourier transform
- the baseband processor 2920 and the RF processor 2910 may transmit and receive signals as described above. Accordingly, the baseband processor 2920 and the RF processor 2910 may be referred to as a transmitter, a receiver, a transceiver, or a communicator. Further, at least one of the baseband processor 2920 and the RF processor 2910 may include a plurality of communication modules to support a plurality of different radio access technologies. In addition, at least one of the baseband processor 2920 and the RF processor 2910 may include different communication modules to process signals of different frequency bands. For example, the different wireless access technologies may include a wireless LAN (eg, IEEE 802.11), a cellular network (eg, LTE), and the like. In addition, the different frequency bands may include a super high frequency (SHF) (eg 2.5 GHz, 5 Ghz) band and a millimeter wave (eg 60 GHz) band.
- SHF super high frequency
- the storage unit 2930 may store data such as a basic program, an application program, and setting information for the operation of the terminal.
- the storage unit 2930 may store information related to a second access node that performs wireless communication using a second wireless access technology.
- the storage unit 2930 may provide stored data according to a request of the control unit 2940.
- the controller 2940 may control overall operations of the terminal.
- the controller 2940 may transmit and receive a signal through the baseband processor 2920 and the RF processor 2910.
- the control unit 2940 records and reads data in the storage unit 2940.
- the controller 2940 may include at least one processor.
- the controller 2940 may include a communication processor (CP) for performing control for communication and an application processor (AP) for controlling a higher layer such as an application program.
- the controller 2940 may control the terminal to perform the operation and procedure of the illustrated terminal.
- controller 2940 may acquire system information from the base station.
- the controller 2940 acquiring the system information may determine whether the second DRX configuration information is included in the system information. In detail, the controller 2940 may determine whether the system information includes the first DRX-related first information and the paging-related second parameter (nB ′ value).
- the controller 2940 may perform an RRC connection establishment process. After the RRC connection is completed, the controller 2940 can transmit a request message to the MME. If the UE prefers to apply the second DRX (eDRX) or if the UE supports the second DRX, the control unit 2940 is the first DRX-related second information (UE specific DRX) and the second DRX-related information in the request message; 2 information (UE specific eDRX value) can be included and transmitted to the MME.
- eDRX second DRX
- 2 information UE specific eDRX value
- controller 2940 may receive a response message corresponding to the request message from the MME.
- the controller 2940 may determine whether the third DRX-related third information (Allowed eDRX parameter) is included in the message.
- the third information related to the second DRX may include information indicating whether the MME supports the second DRX (eDRX) or second DRX (eDRX) period information to be applied by the terminal. .
- the controller 2940 may perform an RRC connection release process.
- the controller 2940 that releases the RRC connection may operate by applying a second DRX (eDRX).
- the controller 2940 may derive the second DRX cycle T ′ and the first DRX cycle T and determine the PHF and the PF by using the above-described method.
- the above step may be performed in advance before RRC connection release.
- the controller 2940 may sequentially receive the MIB and the system information SIB1.
- the control unit 2940 receiving the system information may check the systemInfoValueTag or systemInfoValueTagExt value included in the SIB1.
- the control unit 2940 may check systemInfoValueTag or systemInfoValueTagExt by receiving SIB1 at least once every T ′, which is a second DRX (eDRX) period.
- the controller 2940 may receive the first PF and PO of the PHF determined according to the second DRX (eDRX) cycle and the SIB1 closest in the time domain. have.
- the SIB1 closest to the SIB1 occurring later (or earlier) than the first PF and PO of the PHF may be received.
- controller 2940 may determine whether the stored value and the checked (the IEs) value are different.
- controller 2940 does not need to update the system information.
- control unit 2940 may receive the system information that the base station is currently broadcasting in step S2770.
- the controller 2940 may perform only the first DRX process.
- FIG. 30 shows a block configuration of a base station according to the present invention.
- the base station includes an RF processor 3010, a baseband processor 3020, a backhaul communication unit 3030, a storage unit 3040, and a controller 3050.
- the RF processor 3010 may perform a function for transmitting and receiving a signal through a wireless channel such as band conversion and amplification of a signal. That is, the RF processor 3010 up-converts the baseband signal provided from the baseband processor 3020 to an RF band signal and transmits the same through an antenna, and transmits an RF band signal received through the antenna to a baseband signal. Can be downconverted to
- the RF processor 3010 may include a transmission filter, a reception filter, an amplifier, a mixer, an oscillator, a DAC, an ADC, and the like. In the figure, only one antenna is shown, but the first access node may have a plurality of antennas.
- the RF processor 3010 may include a plurality of RF chains. In addition, the RF processor 3010 may perform beamforming. For the beamforming, the RF processor 3010 may adjust the phase and magnitude of each of the signals transmitted and received through a plurality of antennas or antenna elements.
- the baseband processor 3020 may perform a baseband signal and bit string conversion function according to a physical layer standard of the first wireless access technology. For example, during data transmission, the baseband processor 3020 may generate complex symbols by encoding and modulating a transmission bit string. In addition, when receiving data, the baseband processor 3020 may restore the received bit string by demodulating and decoding the baseband signal provided from the RF processor 3010. For example, according to the OFDM scheme, during data transmission, the baseband processor 3020 generates complex symbols by encoding and modulating a transmission bit stream, maps the complex symbols to subcarriers, and then executes an IFFT operation and OFDM insertion may be used to configure OFDM symbols.
- the baseband processor 3020 divides the baseband signal provided from the RF processor 3010 in OFDM symbol units, restores signals mapped to subcarriers through an FFT operation, and demodulates the demodulated signal.
- the reception bit string may be restored by decoding.
- the baseband processor 3020 and the RF processor 3010 may transmit and receive signals as described above. Accordingly, the baseband processor 3020 and the RF processor 3010 may be referred to as a transmitter, a receiver, a transceiver, a communication unit, or a wireless communication unit.
- the backhaul communication unit 3030 may provide an interface for communicating with other nodes in the network. That is, the backhaul communication unit 3030 converts a bit string transmitted from the main base station to another node, for example, an auxiliary base station, a core network, etc. into a physical signal, and converts a physical signal received from the other node into a bit string. I can convert it.
- the storage unit 3040 may store data such as a basic program, an application program, and setting information for the operation of the main station.
- the storage unit 3040 may store information on a bearer allocated to the connected terminal, a measurement result reported from the connected terminal, and the like.
- the storage unit 3040 may store information that is a criterion for determining whether to provide or terminate multiple connections to the terminal.
- the storage unit 3040 may provide stored data according to a request of the controller 3050.
- the controller 3050 may control overall operations of the main base station.
- the controller 3050 may transmit and receive a signal through the baseband processor 3020 and the RF processor 3010 or through the backhaul communication unit 3030.
- the controller 3050 records and reads data in the storage unit 3040.
- the controller 3050 may include at least one processor.
- the controller 3050 may include a multiple connection controller 3052 for performing a control for providing multiple connections to a terminal.
- the controller 3050 may control the main station to perform operations and procedures of the illustrated base station.
- controller 3050 may determine whether system information is updated.
- the controller 3050 may increment the systemInfoValueTag and systemInfoValueTagExt by one. Alternatively, you can increase the systemInfoValueTag value by one and if wraparound occurs, then you can increment systemInfoValueTagExt by one.
- the controller 3050 may include the updated information IE to broadcast system information SIB1.
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Abstract
Description
Claims (15)
- 단말의 방법에 있어서,시스템 정보를 기지국으로부터 수신하는 단계;상기 시스템 정보에 제2 주기로 동작하는 제2 DRX와 관련된 제1 정보가 포함된 경우, 상기 제2 DRX와 관련된 제2 정보를 포함한 요청 메시지를 이동성 관리 엔티티(mobility management entity: MME)에 전송하는 단계;상기 MME로부터 상기 요청 메시지에 상응하는 응답 메시지를 수신하는 단계; 및상기 응답 메시지에 상기 제2 DRX와 관련된 제3 정보가 포함된 경우, 상기 제3 정보에 기반하여 상기 제2 DRX 동작을 수행하는 단계를 포함하는 것을 특징으로 하는 방법.
- 제1항에 있어서,상기 제1 정보는 상기 기지국이 상기 제2 DRX를 지원하는지 여부를 지시하는 정보를 포함하며,상기 제1 정보가 상기 시스템 정보에 포함되지 않은 경우, 제1 주기로 동작하는 제1 DRX 동작을 수행하는 단계를 더 포함하는 것을 특징으로 하는 방법.
- 제1항에 있어서,상기 제2 정보는 상기 단말이 결정한 상기 제2 DRX의 주기 정보를 포함하며,상기 제3 정보는 상기 제2 정보에 기반하여 결정되며,상기 제3 정보가 상기 응답 메시지에 포함되지 않은 경우, 제1 주기로 동작하는 제1 DRX 동작을 수행하는 단계를 더 포함하는 것을 특징으로 하는 방법.
- 기지국의 방법에 있어서,기지국이 제2 주기로 동작하는 제2 DRX를 지원하는 경우, 상기 제2 DRX와 관련된 제1 정보를 포함한 시스템 정보를 단말에 전송하는 단계;이동성 관리 엔티티(mobility management entity: MME)로부터 상기 제2 DRX와 관련된 제3 정보를 포함한 페이징 메시지를 수신하는 단계; 및상기 제3 정보에 기반하여 상기 제2 DRX 동작을 수행하는 단계를 포함하는 것을 특징으로 하는 방법.
- 제4항에 있어서,상기 제1 정보는 상기 기지국이 상기 제2 DRX를 지원하는지 여부를 지시하는 정보를 포함하며,상기 제3 정보는 상기 제2 DRX의 주기 정보를 포함하는 것을 특징으로 하는 방법.
- 이동성 관리 엔티티(mobility management entity: MME)의 방법에 있어서,단말이 제2 주기로 동작하는 제2 DRX와 관련된 제1 정보가 포함된 시스템 정보를 수신하는 경우, 상기 단말로부터 상기 제2 DRX와 관련된 제2 정보를 포함한 요청 메시지를 수신하는 단계;상기 요청 메시지에 대응하여 상기 제2 DRX와 관련된 제3 정보를 포함한 응답 메시지를 상기 단말에 전송하는 단계; 및상기 제3 정보를 포함한 페이징 메시지를 기지국에 전송하는 단계를 포함하는 것을 특징으로 하는 방법.
- 제6항에 있어서,상기 제3 정보는 상기 단말과 기지국이 상기 제2 DRX 동작을 수행하는 데 사용되며,상기 제1 정보는 기지국이 상기 제2 DRX를 지원하는지 여부를 지시하는 정보를 포함하고,상기 제2 정보는 상기 단말이 결정한 상기 제2 DRX의 주기 정보를 포함하며,상기 제3 정보는 상기 제2 정보에 기반하여 결정되는 것을 특징으로 하는 방법.
- 단말에 있어서,다른 네트워크 엔티티에 신호를 송수신하는 송수신부;및시스템 정보를 기지국으로부터 수신하고, 상기 시스템 정보에 제2 주기로 동작하는 제2 DRX와 관련된 제1 정보가 포함된 경우, 상기 제2 DRX와 관련된 제2 정보를 포함한 요청 메시지를 이동성 관리 엔티티(mobility management entity: MME)에 전송하고, 상기 MME로부터 상기 요청 메시지에 상응하는 응답 메시지를 수신하고, 상기 응답 메시지에 상기 제2 DRX와 관련된 제3 정보가 포함된 경우, 상기 제3 정보에 기반하여 상기 제2 DRX 동작을 수행하는 제어부를 포함하는 것을 특징으로 하는 단말.
- 제8항에 있어서,상기 제1 정보는 상기 기지국이 상기 제2 DRX를 지원하는지 여부를 지시하는 정보를 포함하며,상기 제어부는,상기 제1 정보가 상기 시스템 정보에 포함되지 않은 경우, 제1 주기로 동작하는 제1 DRX 동작을 수행하도록 제어하는 것을 특징으로 하는 단말.
- 제8항에 있어서,상기 제2 정보는 상기 단말이 결정한 상기 제2 DRX의 주기 정보를 포함하며,상기 제3 정보는 상기 제2 정보에 기반하여 결정되는 것을 특징으로 하는 단말.
- 제8항에 있어서,상기 제어부는,상기 제3 정보가 상기 응답 메시지에 포함되지 않은 경우, 제1 주기로 동작하는 제1 DRX 동작을 수행하도록 제어하는 것을 특징으로 하는 단말.
- 기지국에 있어서,다른 네트워크 엔티티와 신호를 송수신하는 송수신부; 및기지국이 제2 주기로 동작하는 제2 DRX를 지원하는 경우, 상기 제2 DRX와 관련된 제1 정보를 포함한 시스템 정보를 단말에 전송하고, 이동성 관리 엔티티(mobility management entity: MME)로부터 상기 제2 DRX와 관련된 제3 정보를 포함한 페이징 메시지를 수신하고, 상기 제3 정보에 기반하여 상기 제2 DRX 동작을 수행하는 제어부를 포함하는 것을 특징으로 하는 기지국.
- 제12항에 있어서,상기 제1 정보는 상기 기지국이 상기 제2 DRX를 지원하는지 여부를 지시하는 정보를 포함하며,상기 제3 정보는 상기 제2 DRX의 주기 정보를 포함하는 것을 특징으로 하는 기지국.
- 이동성 관리 엔티티(mobility management entity: MME)에 있어서,다른 네트워크 엔티티와 신호를 송수신하는 송수신부; 및단말이 제2 주기로 동작하는 제2 DRX와 관련된 제1 정보가 포함된 시스템 정보를 수신하는 경우, 상기 단말로부터 상기 제2 DRX와 관련된 제2 정보를 포함한 요청 메시지를 수신하고, 상기 요청 메시지에 대응하여 상기 제2 DRX와 관련된 제3 정보를 포함한 응답 메시지를 상기 단말에 전송하고, 상기 제3 정보를 포함한 페이징 메시지를 기지국에 전송하는 제어부를 포함하는 것을 특징으로 하는 MME.
- 제14항에 있어서,상기 제3 정보는 상기 단말과 기지국이 상기 제2 DRX 동작을 수행하는 데 사용되며,상기 제1 정보는 기지국이 상기 제2 DRX를 지원하는지 여부를 지시하는 정보를 포함하고,상기 제2 정보는 상기 단말이 결정한 상기 제2 DRX의 주기 정보를 포함하며,상기 제3 정보는 상기 제2 정보에 기반하여 결정되는 것을 특징으로 하는 MME.
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US15/751,079 US10568028B2 (en) | 2015-08-07 | 2016-08-08 | Method and apparatus for applying discontinuous reception mode in wireless communication system |
US16/791,468 US11356945B2 (en) | 2015-08-07 | 2020-02-14 | Method and apparatus for applying discontinuous reception mode in wireless communication system |
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