Switch and communication method

Abstract

The switch has: a receiving unit that receives a message notifying the existence of an incoming call to a terminal from a gateway; a control unit that adjusts the time of sending a paging corresponding to the message to a base station; and a sending unit that sends the paging to the base station at the adjusted time.

Description

Technical Field

[0001] The invention relates to a switch and a communication method in a wireless communication system. Background Art

[0002] In LTE (Long Term Evolution), extended discontinuous reception, namely eDRX (extended Discontinuous Reception) is adopted (for example, non-patent document 1 and non-patent document 2). In eDRX, in order to save power by reducing the paging reception process when the UE (User Equipment) performs intermittent reception, WUS (Wake Up Signal) is introduced. Before the paging reception opportunity, the eNB (E-UTRAN (Universal Terrestrial Radio Access Network) NodeB) sends the WUS to the UE so that the UE can determine whether to start the paging reception process. When the WUS determines that the paging reception process is not required, the UE can skip the paging reception process, thereby reducing power consumption.

[0003] Prior art literature

[0004] Non-patent literature

[0005] Non-patent document 1: 3GPP TS 36.300 V15.6.0 (2019-06)

[0006] Non-patent document 2: 3GPP TS 23.401 V15.8.0 (2019-06) Summary of the invention

[0007] Problems to be solved by the invention

[0008] When the UE is in the eDRX state and a paging is transmitted from the network later than the WUS used in determining whether to start the paging reception process, the UE does not start the paging reception process, and the paging reception may fail.

[0009] The present invention has been made in view of the above-mentioned situation, and an object of the present invention is to improve the possibility of receiving paging during intermittent reception in a wireless communication system.

[0010] Means for solving problems

[0011] According to the disclosed technology, a switch is provided, which has: a receiving unit, which receives a message from a gateway notifying the existence of an incoming call to a terminal; a control unit, which adjusts the time of sending a paging corresponding to the message to a base station; and a sending unit, which sends the paging to the base station at the adjusted time.

[0012] Effects of the Invention

[0013] According to the disclosed technology, it is possible to improve the possibility of receiving paging during intermittent reception in a wireless communication system. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a diagram showing a configuration example of a wireless communication system.

[0015] Figure 2 It is a diagram for explaining an example of eDRX.

[0016] Figure 3 This is a diagram for explaining an example of eDRX in an embodiment of the present invention.

[0017] Figure 4 It is a sequence diagram for explaining the operation of the wireless communication system in the embodiment of the present invention.

[0018] Figure 5 This is a flowchart for explaining the operation of the switch 30 in the embodiment of the present invention.

[0019] Figure 6 It is a diagram showing an example of the functional configuration of the base station 10 in the embodiment of the present invention.

[0020] Figure 7 This is a diagram showing an example of the functional configuration of the terminal 20 in the embodiment of the present invention.

[0021] Figure 8 This is a diagram showing an example of the functional configuration of the switch 30 in the embodiment of the present invention.

[0022] Fig. 9 This is a diagram showing an example of the hardware configuration of the device in the embodiment of the present invention. DETAILED DESCRIPTION

[0023] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In addition, the embodiment described below is only an example, and the embodiment to which the present invention is applied is not limited to the following embodiment.

[0024] When the wireless communication system according to the embodiment of the present invention operates, existing technologies are appropriately used. However, the existing technologies are, for example, existing LTE, but are not limited to existing LTE. In addition, unless otherwise specified, the term "LTE" used in this specification has a broad meaning including LTE-Advanced and methods after LTE-Advanced (for example, NR).

[0025] Furthermore, in the embodiments of the present invention, the duplexing method may be a TDD (Time Division Duplex) method, an FDD (Frequency Division Duplex) method, or other methods (for example, Flexible Duplex, etc.).

[0026] In the embodiment of the present invention, “configuring” wireless parameters and the like may be pre-configuring predetermined values, or may be configuring wireless parameters notified from the base station 10 or the terminal 20 .

[0027] Figure 1 FIG. 1 is a diagram showing a configuration example of a wireless communication system. Figure 1 As shown, the wireless communication system in the embodiment of the present invention includes a base station 10A, a base station 10B, a base station 10C as eNB, a terminal 20 as UE, a switch 30 as MME, and a service gateway 31 as S-GW. Figure 1 In the figure, three base stations 10, one terminal 20, one switch 30, and one service gateway 31 are shown, but this is only an example, and there can be more than one. In addition, for example, in a NR (New Radio) system instead of LTE, the base station 10 can correspond to a gNB, the switch 30 can correspond to an AMF (Access and Mobility Management Function), etc., and the service gateway 31 can correspond to a device or function with other names such as an SMF (Session Management Function) or an UPF (User Plane Function).

[0028] The base station 10 is a communication device that provides one or more cells and performs wireless communication with the terminal 20. The physical resources of the wireless signal are defined by the time domain and the frequency domain. The time domain can be defined by the number of OFDM symbols, and the frequency domain can be defined by the number of subcarriers or the number of resource blocks. The base station 10 sends a synchronization signal and system information to the terminal 20. Synchronization signals are, for example, PSS (Primary Synchronization Signal) and SSS (Secondary Synchronization Signal). A part of the system information is sent, for example, through PBCH, also known as broadcast information. The synchronization signal and the broadcast information can also be sent periodically. For example, the base station 10 sends a control signal or data to the terminal 20 through DL (Downlink), and receives a control signal or data from the terminal 20 through UL (Uplink). In addition, the base station 10 is connected to the switch 30 and the service gateway 31 respectively.

[0029] Terminal 20 is a communication device with wireless communication function, such as a smart phone, mobile phone, tablet computer, wearable terminal, M2M (Machine-to-Machine) communication module, etc. Terminal 20 receives control signals or data from base station 10 via DL and sends control signals or data to base station 10 via UL, thereby utilizing various communication services provided by the wireless communication system.

[0030] The switch 30 is a switch that accommodates the base station 10 and provides a control function related to mobility, a control function related to bearer, etc. Also, for example, the switch 30 has a function of controlling DRX or eDRX, and a function of sending paging when a call is incoming. Paging can be sent to a plurality of base stations 10 according to tracking areas, etc.

[0031] The serving gateway 31 is a packet switch on the LTE network and has a function of transmitting and receiving user data.

[0032] The switch 30 and the serving gateway 31 are included in the EPC (Evolved Packet Core) as a core network. The EPC accommodates the access network of LTE and is a network composed of switches, subscriber information management devices, etc. The terminal 20 communicates with the core network via the radio access network.

[0033] Figure 2This is a group of examples for explaining eDRX (extended Discontinuous Reception). WUS (Wake Up Signal) specified in 3GPP (3rd Generation Partnership Project) is a technology that reduces the paging reception processing when the terminal 20 performs intermittent reception such as eDRX to achieve power saving. Before the paging reception opportunity, signaling notification is performed between the base station 10 and the terminal 20, and the terminal 20 determines whether the paging processing is activated. By skipping unnecessary paging reception processing, the terminal 20 can reduce the power associated with the activation of the wireless function.

[0034] The eDRX cycle can be defined as Figure 2 The switch 30 can determine the eDRX cycle for each terminal 20 and notify the base station 10. For example, the SFN (System Frame Number) can be 10ms, and the H-SFN can be composed of 1024 SFNs and is 10.24s. The H-SFN that the terminal 20 attempts to receive is called Figure 2 The PH (Paging Hyperframe) shown.

[0035] In eDRX, H-SFN-level time synchronization is performed between the switch 30, the base station 10, and the terminal 20. H-SFN-level time synchronization refers to synchronization with a difference of several seconds, for example. The switch 30 sends paging at an appropriate timing to perform incoming call processing. The period during which the terminal 20 attempts to receive paging within the PH is called PTW (Paging Time Window). The switch 30 sends paging to the base station 10 based on the PTW.

[0036] The base station 10 and the terminal 20 perform time synchronization at the SFN level. The period during which paging can be processed between the base station 10 and the terminal 20 is called PO (Paging Occasion), and the terminal 20 receives paging at the timing of PO in the PTW. Here, by confirming the presence or absence of paging between the base station 10 and the terminal 20 before the PTW, the WUS can notify the terminal 20 from the base station 10 of information indicating whether to skip the PO included in the PTW. In addition, as Figure 2 As shown, the period from the end of WUS to the start of PO is called time offset, and the SFN including PO is called PF (Paging Frame).

[0037] like Figure 2 As shown in 1), when WUS is executed before paging is sent from the exchange 30, since the paging has not reached the base station 10, WUS is used to notify the terminal of information that the PO included in the PTW can be skipped. Figure 2 As shown in 2), since the terminal 20 recognizes that the paging has not arrived using the WUS, the reception processing of the PO included in the PTW is skipped.

[0038] As described above, when the determination of the presence or absence of paging related to the WUS is started before the paging transmission by the exchange 30, the terminal 20 cannot receive the paging because the reception process is not performed.

[0039] In addition, in eDRX, strict time synchronization is not required for time synchronization between related devices, but it depends on installation or operation. In the operation of eDRX, even if the time synchronization accuracy is reduced, as long as the switch 30 sends a paging, it can be received by the terminal 20 in the subsequent PO. However, when WUS is introduced, since it has the function of skipping subsequent PO, sometimes an irreparable situation occurs. In addition, the information of WUS is managed between the base station 10 and the terminal 20, and is not notified to the switch 30. Therefore, it is difficult to perform control assuming WUS in the switch 30.

[0040] Therefore, the switch 30 determines whether the terminal 20 applies eDRX, and when the eDRX application is in progress and paging is reserved in the core network, the paging transmission timing is adjusted to control the paging to be transmitted earlier than the previous transmission timing. By advancing the paging transmission timing on the core network side regardless of the offset seconds between the WUS and the PO, the sequentiality of the paging timing and the WUS timing can be ensured, and the failure of the terminal 20 to receive the paging can be suppressed.

[0041] For example, the switch 30 determines whether eDRX is applied and whether paging retention is applied. In addition, for example, the switch 30 determines whether paging timing adjustment is required based on the above determination results. In addition, for example, when paging timing adjustment is required, the switch 30 selects an appropriate number of seconds.

[0042] Figure 3 This is a diagram for explaining an example of eDRX in an embodiment of the present invention. In the switch 30, it is determined whether eDRX related to a terminal 20 is applied and whether paging retention is required, and the paging time is adjusted in advance as needed. By using the function of adjusting the paging time, the paging time can be advanced, and the switch 30 can send a paging to the base station 10 before the WUS determination.

[0043] like Figure 3 As shown in 1), the switch 30 advances the paging time by an offset. Figure 3 As shown in 2), the determination related to WUS must be implemented after paging. Since the determination of WUS of the base station 10 is implemented after the paging is sent from the exchange 30, the WUS is used to notify the terminal of the information indicating that it is necessary to receive the PO included in the PTW. Therefore, Figure 3 As shown in 3), since the terminal 20 recognizes the need for paging reception processing using WUS, it performs reception processing for the PO included in the PTW.

[0044] Figure 4 This is a timing diagram for explaining the operation of the wireless communication system in the embodiment of the present invention. Figure 4 The timing diagram shown is consistent with Figure 3 An example of processing related to paging reception in eDRX is shown.

[0045] In step S1, the switch 30 determines the eDRX timer. Next, the switch 30 notifies the terminal 20 of the eDRX timer (S2). In step S3, the terminal 20, the base station 10, and the switch 30 start eDRX.

[0046] In step S4, the service gateway 31 receives a downlink packet sent to the terminal 20. In the next step S5, the service gateway 31 sends a "Downlink Data Notification" to the base station 10. Here, GTP (GPRS Tunnelling Protocol) v2 is an access control protocol, and "Downlink Data Notification" is a message that notifies the switch 30 of an incoming call in the terminal 20. In the next step S6, the switch 30 makes a determination related to the paging time adjustment.

[0047] Figure 5 This is a flowchart for explaining the operation of the switch 30 in the embodiment of the present invention. Figure 5 , explain in detail Figure 4 The process of the switch 30 in step S6 is shown.

[0048] In step S61, the switch 30 receives an incoming call request from the serving gateway 31. Next, the switch 30 determines whether the eDRX of the terminal 20 corresponding to the incoming call request is activated. If the eDRX is not activated ("No" in S62), the process proceeds to step S63. If the eDRX is activated ("Yes" in S62), the process proceeds to step S64. In step S63, the switch 30 immediately sends a paging to the base station 10 and ends the process.

[0049] On the other hand, in step S64, the switch 30 determines whether paging reservation of the terminal 20 corresponding to the incoming call request is required. If paging reservation is not required ("No" in S64), the process proceeds to step S63, and if paging reservation is required ("Yes" in S64), the process proceeds to step S65. For example, when the terminal 20 is in the wakeup state while the eDRX is activated, it is determined that paging reservation is not required.

[0050] In step S65, the switch 30 adjusts and saves the time when the paging is sent. For example, the time that is n seconds earlier is saved. For example, n seconds can be the time corresponding to the period from the end of WUS to the start of PO, and n is not limited to an integer. In addition, for example, in eDRX, since the time synchronization of the H-SFN layer is performed between the switch 30 and the base station 10 and the terminal 20, the switch 30 can also set n based on the time when the base station 10 is assumed to make a WUS-related decision in PH and the time added according to the synchronization accuracy, so that the paging is sent from the switch 30 to the base station 10 before the WUS-related decision. Next, the switch 30 instructs the service gateway 31 to buffer the packet (S66) and ends the process.

[0051] return Figure 4 In step S7, the switch 30 sends a "DDN ack" to the service gateway 31. Figure 3 The information indicating the buffering of the packet is sent together with "DDN ack" to the service gateway 31. Next, the service gateway 31 holds the Downlink packet sent to the terminal 20 (S8).

[0052] In step S9, the switch 30 starts paging at the adjustment time determined in step S6. The switch 30 sends a paging to the base station 10 (S10). In addition, S1AP is a protocol that specifies the functions between the switch 30 and the base station 10 required for communication control of the terminal 20. Here, Figure 4 As shown, compared with the paging transmission based on the conventional timing, the paging is transmitted to the base station 10 earlier by the offset.

[0053] Next, the base station 10 recognizes that there is a paging situation for the terminal 20 (S11). Next, the base station 10 uses broadcast information to send a WUS indicating that paging reception is required to the terminal 20 (S12). In step 13, the terminal 20 determines that paging reception is required based on the received WUS. Next, the terminal 20 receives a paging based on RRC (Radio Resource Control) signaling from the base station 10 in PO.

[0054] In addition, in the above-mentioned action of the terminal 20 using WUS to skip the paging process, the terminal 20 may have a state of whether to apply the function of reducing the paging reception process when performing intermittent reception. In addition, the base station 10 and the switch 30 may set this state in the terminal 20 or obtain this state from the terminal 20. By reducing the paging reception process, the power saving of the terminal 20 can be achieved.

[0055] In addition, in order to prevent the paging from being sent from the switch 30 to the base station 10 after the WUS, the base station 10 may send information indicating whether the WUS is sent to the switch 30, or may send information indicating the time when the WUS is sent to the switch 30. The switch 30 may adjust the time to send the paging based on the information indicating the time when the WUS is sent received from the base station 10.

[0056] According to the above-mentioned embodiment, when an incoming call arrives at the terminal 20, the switch 30 determines whether eDRX related to the terminal 20 is applied and whether paging retention is required, and adjusts the paging time by advancing the paging time as needed, thereby being able to send a paging to the base station 10 before the determination processing related to the WUS in the base station 10.

[0057] That is, it is possible to increase the possibility of receiving paging during intermittent reception in a wireless communication system.

[0058] (Device Structure)

[0059] Next, a functional configuration example of the base station 10, terminal 20, and switch 30 that execute the above-described processing and operation is described. The base station 10, terminal 20, and switch 30 include functions for implementing the above-described embodiments. However, the base station 10, terminal 20, and switch 30 may each include only a portion of the functions in the embodiments.

[0060] <Base station 10>

[0061] Figure 6 FIG. 1 is a diagram showing an example of a functional configuration of a base station 10 in an embodiment of the present invention. Figure 6 As shown, the base station 10 includes a transmission unit 110 , a reception unit 120 , a setting unit 130 , and a control unit 140 . Figure 6The functional configuration shown is only an example, and any functional division and function unit name may be used as long as the operation according to the embodiment of the present invention can be performed.

[0062] The transmitting unit 110 includes a function of generating a signal to be transmitted to the terminal 20 side and transmitting the signal wirelessly. In addition, the transmitting unit 110 transmits inter-network node messages to other network nodes. The receiving unit 120 includes a function of receiving various signals transmitted from the terminal 20 and obtaining, for example, higher layer information from the received signals. In addition, the transmitting unit 110 has a function of transmitting PSS, SSS, PBCH, DL / UL control signals, etc. to the terminal 20. In addition, the receiving unit 120 receives inter-network node messages from other network nodes.

[0063] The setting unit 130 stores preset setting information and various setting information transmitted to the terminal 20. The content of the setting information is, for example, setting information related to intermittent reception and paging.

[0064] As described in the embodiment, the control unit 140 performs control related to intermittent reception and paging. Functional units related to signal transmission in the control unit 140 may be included in the transmission unit 110, and functional units related to signal reception in the control unit 140 may be included in the reception unit 120.

[0065] <Terminal 20>

[0066] Figure 7 FIG. 2 is a diagram showing an example of the functional structure of the terminal 20 in the embodiment of the present invention. Figure 7 As shown, the terminal 20 includes a transmitting unit 210 , a receiving unit 220 , a setting unit 230 , and a control unit 240 . Figure 7 The functional configuration shown is only an example, and any functional division and function unit name may be used as long as the operation according to the embodiment of the present invention can be performed.

[0067] The transmitting unit 210 generates a transmission signal according to the transmission data, and transmits the transmission signal wirelessly. The receiving unit 220 receives various signals wirelessly, and obtains a higher layer signal from the received physical layer signal. In addition, the receiving unit 220 has a function of receiving PSS, SSS, PBCH, DL / UL / SL control signals, etc. transmitted from the base station 10. In addition, for example, as D2D communication, the transmitting unit 210 transmits PSCCH (Physical Sidelink Control Channel), PSSCH (Physical Sidelink Shared Channel), PSDCH (Physical Sidelink Discovery Channel), PSBCH (Physical Sidelink Broadcast Channel), etc. to other terminals 20, and the receiving unit 220 receives PSCCH, PSSCH, PSDCH or PSBCH, etc. from other terminals 20.

[0068] The setting unit 230 stores various setting information received by the receiving unit 220 from the base station 10. In addition, the setting unit 230 also stores pre-set setting information. The content of the setting information is, for example, setting information related to intermittent reception and paging.

[0069] As described in the embodiment, the control unit 240 performs control related to intermittent reception and paging. The functional unit related to signal transmission in the control unit 240 may be included in the transmission unit 210, and the functional unit related to signal reception in the control unit 240 may be included in the reception unit 220.

[0070] <Switch 30>

[0071] Figure 8 FIG. 1 is a diagram showing an example of the functional configuration of the switch 30 in the embodiment of the present invention. Figure 8 As shown, the switch 30 includes a transmission unit 310 , a reception unit 320 , a setting unit 330 , and a control unit 340 . Figure 8 The functional structure shown is only an example. As long as the actions involved in the embodiments of the present invention can be performed, the names of the functional divisions and functional units can be arbitrary. In addition, network nodes such as the service gateway 31 can have Figure 8 The functional parts shown in the figure realize the functions described in the embodiments.

[0072] The transmission unit 310 includes a function of generating a signal to be transmitted to the terminal 20 side and transmitting the signal. In addition, the transmission unit 310 transmits network node messages to other network nodes. The reception unit 320 receives various signals transmitted from the terminal 20. In addition, the reception unit 320 receives network node messages from other network nodes.

[0073] The setting unit 330 stores preset setting information and various setting information sent to the terminal 20 or other network nodes. The content of the setting information is, for example, setting information related to communication between network nodes, setting information related to intermittent reception of the terminal 20, and the like.

[0074] As described in the embodiment, the control unit 340 performs control related to communication between network nodes. In addition, the control unit 340 notifies the base station 10, the terminal 20 or other network nodes of control information related to intermittent reception. In addition, the control unit 340 notifies the base station 10, the terminal 20 or other network nodes of control information related to paging. The functional unit related to signal transmission in the control unit 340 may be included in the transmission unit 310, and the functional unit related to signal reception in the control unit 340 may be included in the reception unit 320.

[0075] (Hardware Structure)

[0076] The block diagram used in the description of the above embodiment ( Figure 6 , Figure 7 and Figure 8 ) shows blocks in units of functions. These functional blocks (structural parts) are implemented by any combination of at least one of hardware and software. In addition, there is no particular limitation on the implementation method of each functional block. That is, each functional block can be implemented using a device that is physically or logically combined, or two or more physically or logically separated devices can be directly or indirectly connected (for example, using wires, wirelessly, etc.) and implemented using these multiple devices. The functional block can also be implemented by combining software with the above-mentioned one device or the above-mentioned multiple devices.

[0077] Functionally, it includes judging, deciding, determining, calculating, calculating, processing, deriving, investigating, searching, confirming, receiving, sending, outputting, accessing, solving, selecting, selecting, establishing, comparing, assuming, expecting, regarding, broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, assigning, etc., but is not limited to these. For example, the functional block (structural part) that enables the sending function is called a transmitting unit or a transmitter. In short, as mentioned above, there is no particular limitation on the implementation method.

[0078] For example, the base station 10 , the terminal 20 , the switch 30 and other devices in one embodiment of the present disclosure may also function as a computer that performs the processing of the wireless communication method of the present disclosure. Fig. 9 1001, storage device 1002, auxiliary storage device 1003, communication device 1004, input device 1005, output device 1006, bus 1007, etc.

[0079] In the following description, the word "device" may be replaced by "circuit", "device", "unit", etc. The hardware configuration of the base station 10 and the terminal 20 may include one or more of the devices shown in the figure, or may exclude some of the devices.

[0080] Each function in the base station 10 and the terminal 20 is implemented by the following method: predetermined software (program) is read into hardware such as the processor 1001 and the storage device 1002, so that the processor 1001 performs calculations and controls the communication of the communication device 1004 or controls at least one of the reading and writing of data in the storage device 1002 and the auxiliary storage device 1003.

[0081] The processor 1001 controls the entire computer by, for example, running an operating system. The processor 1001 may also be composed of a central processing unit (CPU) including an interface with peripheral devices, a control device, a computing device, registers, etc. For example, the control unit 140, the control unit 240, etc., may also be implemented by the processor 1001.

[0082] In addition, the processor 1001 reads a program (program code), a software module, or data from at least one of the auxiliary storage device 1003 and the communication device 1004 to the storage device 1002, and performs various processes accordingly. As a program, a program that causes the computer to execute at least a part of the actions described in the above embodiments is used. For example, Figure 6 The control unit 140 of the base station 10 shown may also be implemented by a control program stored in the storage device 1002 and executed in the processor 1001. In addition, for example, Figure 7 The control unit 240 of the terminal 20 shown may also be implemented by a control program stored in the storage device 1002 and running in the processor 1001. In addition, for example, Figure 8 The control unit 340 of the switch 30 shown can also be implemented by a control program stored in the storage device 1002 and running in the processor 1001. Regarding the above-mentioned various processes, although it is described that the above-mentioned various processes are performed by one processor 1001, the above-mentioned various processes can also be performed simultaneously or sequentially by two or more processors 1001. The processor 1001 can also be installed by one or more chips. In addition, the program can also be sent from the network via a telecommunication line.

[0083] The storage device 1002 is a computer-readable recording medium, and may be composed of at least one of ROM (Read Only Memory), EPROM (Erasable Programmable ROM), EEPROM (Electrically Erasable Programmable ROM), RAM (Random Access Memory), etc. The storage device 1002 may also be referred to as a register, a cache, a main memory (main storage device), etc. The storage device 1002 can store executable programs (program codes), software modules, etc. for implementing the communication method involved in one embodiment of the present disclosure.

[0084] The auxiliary storage device 1003 is a computer-readable recording medium, and may be composed of at least one of an optical disk such as a CD-ROM (CompactDisc ROM), a hard disk drive, a floppy disk, a magneto-optical disk (e.g., a compressed disk, a digital versatile disk, a Blu-ray (registered trademark) disk, a smart card, a flash memory (e.g., a card, a stick, a key drive), a Floppy (registered trademark) disk, a magnetic strip, etc. The above-mentioned storage medium may be, for example, a database, a server, and other appropriate media that includes at least one of the storage device 1002 and the auxiliary storage device 1003.

[0085] The communication device 1004 is hardware (transceiver device) for communicating between computers via at least one of a wired network and a wireless network, and may also be referred to as a network device, a network controller, a network card, a communication module, etc. The communication device 1004 may also be configured to include a high-frequency switch, a duplexer, a filter, a frequency synthesizer, etc., for example, in order to realize at least one of frequency division duplex (FDD: Frequency Division Duplex) and time division duplex (TDD: Time Division Duplex). For example, a transceiver antenna, an amplifier, a transceiver, a transmission path interface, etc. may also be realized by the communication device 1004. The transceiver may also be installed by physically or logically separating the transmitter and the receiver.

[0086] The input device 1005 is an input device that receives input from the outside (e.g., a keyboard, a mouse, a microphone, a switch, a button, a sensor, etc.). The output device 1006 is an output device that implements output to the outside (e.g., a display, a speaker, an LED light, etc.). In addition, the input device 1005 and the output device 1006 may also be integrally formed (e.g., a touch panel).

[0087] In addition, the processor 1001 and the storage device 1002 and other devices are connected via a bus 1007 for communicating information. The bus 1007 may be configured using a single bus or may be configured using different buses for each device.

[0088] In addition, the base station 10 and the terminal 20 may be configured to include hardware such as a microprocessor, a digital signal processor (DSP), an ASIC (Application Specific Integrated Circuit), a PLD (Programmable Logic Device), and an FPGA (Field Programmable Gate Array), and may also implement a part or all of each functional block through the hardware. For example, the processor 1001 may also be installed using at least one of these hardware.

[0089] In addition, when the core network functions such as the service gateway 31 are configured as a device, the service gateway 31 may be configured as a device in the same manner as the switch 30. Fig. 9 The hardware structure shown.

[0090] (Summary of Implementation Methods)

[0091] As described above, according to an embodiment of the present invention, a switch is provided, which comprises: a receiving unit, which receives a message notifying the existence of an incoming call to a terminal from a gateway; a control unit, which adjusts the time of sending a paging corresponding to the message to a base station; and a sending unit, which sends the paging to the base station at the adjusted time.

[0092] According to the above configuration, when an incoming call arrives at the terminal 20, the switch 30 adjusts the paging time in a manner that advances the paging time as needed, thereby being able to send a paging to the base station 10 before the determination process related to the WUS in the base station 10. That is, the possibility of receiving a paging during intermittent reception can be increased in the wireless communication system.

[0093] The control unit may adjust the time of sending a paging corresponding to the message to the base station when the terminal is in an intermittent reception state. According to this configuration, when an incoming call arrives at the terminal 20, the switch 30 determines whether eDRX related to the terminal 20 is applied, and adjusts the paging time in a manner that advances the paging time as needed, thereby being able to send a paging to the base station 10 before the determination process related to the WUS in the base station 10.

[0094] The control unit can adjust the time of sending the paging corresponding to the message to the base station when the terminal is in the intermittent reception state and the paging reservation is required. According to this structure, when an incoming call arrives at the terminal 20, the switch 30 determines whether the paging reservation related to the terminal 20 is required, and adjusts the paging time in a manner of advancing the paging time as needed, thereby being able to send the paging to the base station 10 before the determination process related to the WUS in the base station 10.

[0095] The control unit can, when applying a function of reducing the paging reception processing when the terminal performs intermittent reception, send a paging time corresponding to the message to the base station. According to this structure, when an incoming call arrives at the terminal 20, the switch 30 adjusts the paging time as needed, thereby being able to send a paging to the base station 10 before the determination processing related to the WUS in the base station 10.

[0096] The control unit may adjust the time of sending the paging corresponding to the message to the base station to the time before the base station sends the start signal to the terminal. According to this structure, when an incoming call arrives at the terminal 20, the switch 30 adjusts the paging time in a manner that advances the paging time as needed, thereby being able to send the paging to the base station 10 before the determination process related to the WUS in the base station 10.

[0097] The control unit may adjust the time of sending the paging corresponding to the message to the base station to a time before the determination of the presence or absence of the paging related to the start signal sent by the base station to the terminal is performed. According to this structure, when an incoming call arrives at the terminal 20, the switch 30 adjusts the paging time in a manner that advances the paging time as needed, thereby being able to send the paging to the base station 10 before the determination process related to the WUS in the base station 10.

[0098] In addition, according to an embodiment of the present invention, there is provided a communication method executed by a switch, which has the following steps: a receiving step, receiving a message from a gateway notifying the existence of an incoming call to a terminal; a controlling step, adjusting the time for sending a paging corresponding to the message to a base station; and a sending step, sending the paging to the base station at the adjusted time.

[0099] According to the above configuration, when an incoming call arrives at the terminal 20, the switch 30 adjusts the paging time in a manner that advances the paging time as needed, thereby being able to send a paging to the base station 10 before the determination process related to the WUS in the base station 10. That is, the possibility of receiving a paging during intermittent reception can be increased in the wireless communication system.

[0100] (Supplementary Implementation Methods)

[0101] The above describes the embodiments of the present invention, but the disclosed invention is not limited to such embodiments, and those skilled in the art should understand various variations, modifications, substitutions, replacements, etc. In order to promote the understanding of the invention, specific numerical examples are used for description, but unless otherwise specified, these numerical values ​​are only examples, and any appropriate value may also be used. The distinction between the items in the above description is not essential to the present invention. The items recorded in two or more items can be combined and used as needed, and the items recorded in a certain item can be applied to the items recorded in another item (as long as there is no contradiction). The boundaries of the functional units or processing units in the functional block diagram do not necessarily correspond to the boundaries of the physical components. The actions of multiple functional units can be performed by one physical component, or the actions of one functional unit can be performed by multiple physical components. Regarding the processing process described in the embodiment, the order of processing can be swapped if there is no contradiction. In order to facilitate the description of the processing, the base station 10 and the terminal 20 are described using functional block diagrams, but such devices can also be implemented in hardware, software, or a combination thereof. The software that operates through the processor of the base station 10 according to the embodiment of the present invention and the software that operates through the processor of the terminal 20 according to the embodiment of the present invention may also be stored in random access memory (RAM), flash memory, read-only memory (ROM), EPROM, EEPROM, registers, hard disk (HDD), removable disk, CD-ROM, database, server and any other appropriate storage medium.

[0102] In addition, the notification of information is not limited to the form / implementation method described in the present disclosure, and other methods may also be used. For example, the notification of information may be implemented through physical layer signaling (e.g., DCI (Downlink Control Information), UCI (Uplink Control Information)), high-layer signaling (e.g., RRC (Radio Resource Control) signaling, MAC (Medium Access Control) signaling, broadcast information (MIB (Master Information Block), SIB (System Information Block)), other signals or a combination thereof. In addition, RRC signaling may be referred to as an RRC message, for example, it may also be an RRC Connection Setup message, an RRC Connection Reconfiguration message, etc.

[0103] Each form / implementation described in the present disclosure may also be applied to at least one of LTE (Long Term Evolution), LTE-A (LTE-Advanced), SUPER 3G, IMT-Advanced, 4G (4th generation mobile communication system), 5G (5th generation mobile communication system), FRA (Future Radio Access), NR (New Radio), W-CDMA (registered trademark), GSM (registered trademark), CDMA 2000, UMB (Ultra Mobile Broadband), IEEE 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark)), IEEE 802.20, UWB (Ultra-WideBand), Bluetooth (registered trademark), a system using other appropriate systems, and a next-generation system extended therefrom. In addition, a combination of a plurality of systems (for example, a combination of at least one of LTE and LTE-A with 5G, etc.) may be applied.

[0104] The processing procedures, timings, flows, etc. of each form / implementation described in this specification may be changed in order without contradiction. For example, for the method described in this disclosure, the elements of various steps are presented in an illustrative order, but are not limited to the specific order presented.

[0105] In this specification, the specific actions performed by the base station 10 are sometimes also performed by its upper node according to the situation. In a network composed of one or more network nodes having the base station 10, various actions performed to communicate with the terminal 20 can be performed by at least one of the base station 10 and other network nodes other than the base station 10 (for example, MME or S-GW, etc., but not limited to these). In the above, the case where the other network node other than the base station 10 is one is illustrated, but the other network node may also be a combination of multiple other network nodes (for example, MME and S-GW).

[0106] The information or signals described in the present disclosure can be output from a higher layer (or a lower layer) to a lower layer (or a higher layer), and can also be input or output via a plurality of network nodes.

[0107] The input or output information can be stored in a specific location (e.g., memory) or managed using a management table. The input or output information can be rewritten, updated, or appended. The output information can also be deleted. The input information can also be sent to other devices.

[0108] The determination in the present disclosure may be performed by a value represented by 1 bit (0 or 1), by a Boolean value (Boolean: true or false), or by comparison of numerical values ​​(for example, comparison with a predetermined value).

[0109] Software, whether referred to as software, firmware, middleware, microcode, hardware description language, or by other names, shall be interpreted broadly to refer to commands, sets of commands, codes, code segments, program codes, programs, subroutines, software modules, applications, software applications, software packages, routines, subroutines, objects, executable files, execution threads, procedures, functions, etc.

[0110] In addition, software, commands, information, etc. may be sent and received via a transmission medium. For example, when software is sent from a web page, server, or other remote source using at least one of wired technology (coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), etc.) and wireless technology (infrared, microwave, etc.), at least one of these wired technology and wireless technology is included in the definition of transmission medium.

[0111] The information, signals, etc. described in the present disclosure may also be represented by any of a variety of different technologies. For example, the data, commands, instructions, information, signals, bits, symbols, chips, etc. that may be involved in the above description as a whole may be represented by voltage, current, electromagnetic waves, magnetic fields or magnetic particles, light fields or photons, or any combination of these.

[0112] In addition, the terms described in the present disclosure and the terms required for understanding the present disclosure may be replaced with terms having the same or similar meanings. For example, at least one of a channel and a symbol may also be a signal (signaling). In addition, a signal may also be a message. In addition, a component carrier (CC) may also be referred to as a carrier frequency, a cell, a frequency carrier, etc.

[0113] As used in this disclosure, the terms "system" and "network" may be used interchangeably.

[0114] In addition, the information, parameters, etc. described in the present disclosure may be represented by absolute values, relative values ​​to predetermined values, or other corresponding information. For example, wireless resources may also be indicated by indexes.

[0115] The names used for the above parameters are not limiting in any way. Furthermore, the formulas etc. using these parameters may sometimes differ from those explicitly disclosed in this disclosure. Various channels (e.g., PUCCH, PDCCH, etc.) and information elements may be identified by all appropriate names, and therefore the various names assigned to these various channels and information elements are not limiting in any way.

[0116] In the present disclosure, the terms "base station (BS)," "wireless base station", "base station device", "fixed station", "NodeB", "eNodeB (eNB)", "gNodeB (gNB)", "access point", "transmission point", "reception point", "transmission / reception point", "cell", "sector", "cell group", "carrier", "component carrier" and the like are used interchangeably. Sometimes, the base station is also referred to as macro cell, small cell, femto cell, pico cell and the like.

[0117] A base station can accommodate one or more (for example, 3) cells. When a base station accommodates multiple cells, the overall coverage area of ​​the base station can be divided into multiple smaller areas, and each smaller area can also provide communication services through a base station subsystem (for example, a small base station for indoor use (RRH: Remote Radio Head)). Terms such as "cell" or "sector" refer to a part or the entirety of the coverage area of ​​at least one of a base station and a base station subsystem that provide communication services within the coverage area.

[0118] In the present disclosure, terms such as “mobile station (MS)”, “user terminal (user terminal)”, “user equipment (UE)”, and “terminal” may be used interchangeably.

[0119] For mobile stations, those skilled in the art sometimes also use the following terms: subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, wireless terminal, remote terminal, handset, user agent, mobile client, client, or some other appropriate terms.

[0120] At least one of the base station and the mobile station may also be referred to as a transmitting device, a receiving device, a communication device, etc. In addition, at least one of the base station and the mobile station may be a device mounted on a mobile body, the mobile body itself, etc. The mobile body may be a means of transportation (e.g., a car, an airplane, etc.), a mobile body that moves in an unmanned manner (e.g., a drone, an autonomous vehicle, etc.), or a robot (manned or unmanned). In addition, at least one of the base station and the mobile station also includes a device that does not necessarily move during communication operations. For example, at least one of the base station and the mobile station may be an IoT (Internet of Things) device such as a sensor.

[0121] In addition, the base station in the present disclosure may also be replaced by a user terminal. For example, various forms / implementations of the present disclosure may also be applied to a structure in which the communication between a base station and a user terminal is replaced by the communication between multiple terminals 20 (for example, it may also be referred to as D2D (Device-to-Device), V2X (Vehicle-to-Everything), etc.). In this case, a structure in which the terminal 20 has the functions possessed by the above-mentioned base station 10 may also be formed. In addition, terms such as "uplink" and "downlink" may also be replaced by terms corresponding to communication between terminals (for example, "side"). For example, uplink channels, downlink channels, etc. may also be replaced by side channels.

[0122] Likewise, the user terminal in the present disclosure may be replaced by a base station. In this case, the base station may have the functions of the user terminal described above.

[0123] The terms "determining" and "determining" used in this disclosure sometimes include a variety of actions. "Determining" and "determining" may include, for example, treating matters that have been judged, calculated, calculated, processed, derived, investigated, searched (for example, searched in a table, database or other data structure), confirmed (ascertaining) as matters that have been "judged" or "determined", etc. In addition, "determining" and "determining" may include treating matters that have been received (for example, receiving information), transmitted (for example, transmitting information), input, output, accessed (for example, accessed data in memory) as matters that have been "judged" or "determined", etc. In addition, "determining" and "determining" may include treating matters that have been resolved (resolving), selected (selecting), chosen (choosing), established (establishing), compared (comparing), etc. as matters that have been "judged" or "determined". That is, "judgment" and "decision" can include matters of "judgment" and "decision" of any action. In addition, "judgment (decision)" can also be replaced by "assuming (assuming)", "expecting (expecting)", "considering (considering)" and the like.

[0124] The terms "connected", "coupled" or all variations of these terms are intended to indicate any direct or indirect connection or combination between two or more elements, and may include the situation where there is one or more intermediate elements between two elements that are "connected" or "coupled" to each other. The combination or connection between elements may be a physical combination or connection, a logical combination or connection, or a combination of these. For example, "access" may be used to replace "connection". In the context of the present disclosure, for two elements, it may be considered that they are "connected" or "coupled" to each other by using at least one of one or more wires, cables, and printed electrical connections, and as some non-limiting and non-inclusive examples, by using electromagnetic energy having wavelengths in the wireless frequency domain, microwave region, and light (including both visible and invisible) region, etc.

[0125] The reference signal may be referred to as RS (Reference Signal) for short, or may be referred to as a pilot signal according to the applied standard.

[0126] The phrase "according to" used in the present disclosure does not mean "only according to" unless otherwise expressly stated. In other words, the phrase "according to" means both "only according to" and "at least according to".

[0127] Any reference to an element using the terms "first", "second", etc. used in this disclosure does not necessarily limit the number or order of these elements. These terms can be used as a simple method to distinguish between two or more elements in this disclosure. Therefore, the reference to the first element and the second element does not mean that only two elements can be taken or that the first element must precede the second element in any form.

[0128] The “unit” in the configuration of each of the above-mentioned devices may be replaced with a “section”, “circuit”, “device” or the like.

[0129] When the terms "include," "including," and variations thereof are used in the present disclosure, these terms are intended to be inclusive, as is the term "comprising." Furthermore, the term "or" used in the present disclosure does not mean an exclusive or.

[0130] In the present disclosure, when an article is added by translation, such as a, an, and the in English, for example, the present disclosure also includes the case where the noun following the article is in plural form.

[0131] In the present disclosure, the term "A and B are different" may also mean "A and B are different from each other". In addition, the term may also mean "A and B are different from C, respectively". The terms "separate" and "combined" may also be interpreted in the same way as "different".

[0132] Each form / implementation described in the present disclosure may be used alone or in combination, and may be switched according to execution. In addition, notification of scheduled information is not limited to being performed explicitly (e.g., notification of "yes X"), but may also be performed implicitly (e.g., notification of the scheduled information is not performed).

[0133] In the present disclosure, Downlink Data Notification is an example of a message notifying a terminal of an incoming call. The service gateway 31 is an example of a gateway. WUS is an example of a start signal.

[0134] The present disclosure is described in detail above, but it should be clear to those skilled in the art that the present disclosure is not limited to the embodiments described in the present disclosure. The present disclosure can be implemented as a modification and variation without departing from the subject matter and scope of the present disclosure as determined by the claims. Therefore, the purpose of the description of the present disclosure is to illustrate and not to have any limiting meaning on the present disclosure.

[0135] Description of symbols

[0136] 10: base station (eNB);

[0137] 110: Sending department;

[0138] 120: receiving unit;

[0139] 130: Setting department;

[0140] 140: Control Department;

[0141] 20: terminal (UE);

[0142] 210: Sending department;

[0143] 220: receiving unit;

[0144] 230: Setting department;

[0145] 240: Control Department;

[0146] 30: switch (MME);

[0147] 310: Sending unit;

[0148] 320: receiving unit;

[0149] 330: Setting department;

[0150] 340: Control Department;

[0151] 31: Serving Gateway (S-GW);

[0152] 1001: processor;

[0153] 1002: storage device;

[0154] 1003: auxiliary storage device;

[0155] 1004: Communication devices;

[0156] 1005: input device;

[0157] 1006: Output device.

Claims

1. A switch, comprising: a receiving unit that receives a message notifying the existence of an incoming call to the terminal from the gateway; a control unit that adjusts a time to send a paging corresponding to the message to a base station; and a sending unit, which sends the paging to the base station at the adjusted time, When the control unit applies the function of reducing the paging reception processing when the terminal performs intermittent reception and the retention of paging is required, the time of sending the paging corresponding to the message to the base station is advanced compared to the sending time before adjustment by a time corresponding to the period from the end of WUS sent by the base station to the terminal to the start of PO, wherein the WUS is a wake-up signal and the PO is a paging opportunity.

2. A communication method performed by a switch, comprising the following steps: A receiving step of receiving a message from a gateway notifying that there is an incoming call to the terminal; A control step of adjusting the time of sending a paging corresponding to the message to a base station; a sending step, wherein the paging is sent to the base station at the adjusted time; as well as In a case where the function of reducing the paging reception processing when the terminal performs intermittent reception is applied and the retention of paging is required, the step of advancing the time of sending the paging corresponding to the message to the base station by a time corresponding to the period from the end of the WUS sent by the base station to the terminal to the start of the PO is compared to the sending time before adjustment, wherein the WUS is a wake-up signal and the PO is a paging opportunity.

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