WO2021125372A1 - Electronic device for supporting dual connection, and method for controlling electronic device - Google Patents

Abstract

The present invention comprises: at least one communication module connected to a plurality of different networks so as to transmit and receive packets of different sizes through the different networks; and a modem for detecting the number of packets, dropped during a preset first period, from the packets received through the communication module, detecting a network response delay time on the basis of the time when packets stored in a reordering buffer are output, and changing the size of the reordering buffer on the basis of the result of comparing the network response delay time with a preset first delay time, if the number of dropped packets is greater than or equal to a preset first delay number.

Description

Electronic device supporting dual connection and control method of the electronic device

The present invention relates to an electronic device capable of being simultaneously connected to a 4G network and a 5G network.

Recently, various electronic devices including mobile terminals can use services through 4G networks and 5G networks using not only Long Term Evolution (LTE) communication technology but also New Radio (5G) communication technology (NR).

As such, in the case of an electronic device that can support 4G communication and 5G communication at the same time, it primarily accesses the 4G network and periodically searches for a 5G base station (cell). And when a 5G base station (cell) that satisfies the preset condition is found, the searched 5G base station is added (5G cell add) and wireless communication is performed with the added 5G base station, so that the electronic device is connected to the 4G network and the 5G network at the same time. make it possible

In this case, a high-speed wireless communication service may be provided according to the NR communication technology, and stable wireless communication may be performed according to the LTE communication technology. In this way, the ability to simultaneously connect to the 4G network and the 5G network is called Dual Connectivity, and in more detail, it is called ENDC [Evolved Universal Terrestrial Radio Access Network (EUTRAN) New Radio (NR) Dual Connectivity].

Meanwhile, data received over the network is packetized and transmitted. In addition, the electronic device may receive the packets through a set buffer. In this case, the received packets may be reordered, that is, rearranged in order according to a serial number in a buffer set in the electronic device. Accordingly, in the following description, a buffer in which the packets are received will be referred to as a reordering buffer.

Meanwhile, the electronic device may output the received packets as data when packets are received and the reordering buffer is in a full state, that is, when the reordering buffer is full of packets. In this case, when a packet is received but the reordering buffer is full and the packet cannot be accommodated in the reordering buffer, the received packet is discarded, which is called packet drop.

In order to prevent such a packet drop phenomenon, the size of packets transmitted in the network and the size of the packet capacity receivable in the electronic device, that is, the size of the reordering buffer, should match each other. To this end, in the existing 4G communication method, according to the maximum bandwidth (20Mbps) of the 4G communication method, the size and number of packets transmitted in the network and the size of the reordering buffer set in the electronic device are matched with each other to prevent such packet drop. made it possible

Meanwhile, as described above, currently emerging electronic devices may be connected to a 5G network through a 5G communication method to receive data. In this case, the 5G communication method has a maximum bandwidth of 100 Mbps (FR1) or 400 Mbps (FR2), so data of a size much larger than the data received from the 4G network can be received. It can be much larger than the packet being received.

However, as described above, in the case of an electronic device that can be connected to both the 4G network and the 5G network, it has a structure that allows it to be connected to the 5G network through the 4G network, so basically a reordering buffer according to the 4G communication method is used. It has a structure for receiving data. Therefore, when simultaneously connected to a 4G network and a 5G network through a double connection, packets with a size larger than the size that can be accommodated in the reordering buffer according to the 4G communication method may be received from the 5G network, and in this case, the packet in the reordering buffer A packet drop phenomenon may occur due to not being received.

Meanwhile, in order to solve the packet drop problem, a method of greatly expanding the size of the reordering buffer has been introduced, but the electronic device outputs the received packets to the reordering buffer when the reordering buffer is full of packets. There is a problem in that the time until packets are received and outputted in the reordering buffer is increased. In this case, when the size of the packets is large as in the 5G communication method, the time until the packets are filled in the reordering buffer may be short, but in the case of the small size of the packets as in the 4G communication method, the larger the size of the reordering buffer The time it takes for packets to be received in the header buffer becomes longer, which is the delay time until data is provided to the application layer, the time the application receives data from the network according to the request and outputs the result, that is, the delay of the network response time. There is a problem that causes

An object of the present invention is to solve the above and other problems, and when an electronic device is connected to both a 4G network and a 5G network, the delay of the network response time is minimized while minimizing the drop amount of received packets An object of the present invention is to provide an electronic device that enables the electronic device and a control method of the electronic device.

According to one aspect of the present invention to achieve the above or other objects, an electronic device according to an embodiment of the present invention is connected to a plurality of different networks, and transmits and transmits packets of different sizes through the different networks. Detects the number of packets dropped during a first preset period from at least one receiving communication module and packets received through the communication module, and based on the time when packets stored in a reordering buffer are output The network response delay time is detected, and when the number of the dropped packets is equal to or greater than a preset first number, the size of the reordering buffer is changed based on a result of comparing the network response delay time with the preset first delay time It is characterized in that it includes a modem.

In an embodiment, when the number of dropped packets exceeds a first number, the modem detects the size of the reordering buffer, and when the size of the reordering buffer is an initially set size, a preset ratio It is characterized in that the size of the reordering buffer is increased by the amount.

In an embodiment, the modem is characterized in that it increases the size of the reordering buffer by the preset ratio based on the initial set size of the reordering buffer.

In an embodiment, the modem is characterized in that it increases the size of the reordering buffer by the preset ratio based on the current size of the reordering buffer.

In an embodiment, when the size of the reordering buffer is not an initially set size, the modem compares the network response delay time with the first delay time, and the network response delay time is the first delay time. If it is greater than the time, the size of the reordering buffer is decreased, and if the network response delay time is smaller than the first delay time, the size of the reordering buffer is increased.

In an embodiment, the modem may increase or decrease the size of the reordering buffer by the preset ratio based on the initial set size of the reordering buffer.

In an embodiment, the modem may increase or decrease the size of the reordering buffer by the preset ratio based on the current size of the reordering buffer.

In an embodiment, the modem calculates an average of the times during which packets stored in the reordering buffer are output during a preset second period, and detects it as the network response delay time.

In an embodiment, the first period and the second period are the same time, and the modem synchronizes the first period and the second period to determine the number of packets dropped during the same time and a network response delay time. characterized by detection.

In an embodiment, when the size of the reordering buffer is reduced, the modem compares the initially set size of the reordering buffer with the size of the reordering buffer to be reduced, and performs the reordering according to the larger of the two. It is characterized in that the size of the buffer is determined.

According to an embodiment, it is characterized in that the plurality of different networks are networks having different maximum bandwidths.

According to an aspect of the present invention in order to achieve the above or other objects, a method for controlling an electronic device according to an embodiment of the present invention receives and reorders packets of different sizes through a plurality of different networks. ) storing in a buffer, detecting the number of packets dropped during a preset first period through packet reordering of the reordering buffer, and based on the output time of the packets stored in the reordering buffer detecting a network response delay time, and comparing the network response delay time with a predetermined first delay time when the number of the dropped packets is equal to or greater than a preset first number, and based on the comparison result, and changing the size of the reordering buffer.

In an embodiment, the comparing of the network response delay time with a preset first delay time includes: checking whether the size of the reordering buffer is an initially set size; and, as a result of the check, the reordering buffer The method may further include increasing the size of the reordering buffer according to a preset ratio when the size of is an initially set size.

In an embodiment, the detecting of the network response delay time includes calculating an average of times at which packets stored in the reordering buffer are output during a preset second period and detecting the network response delay time as the network response delay time. characterized.

In an embodiment, the changing of the size of the reordering buffer includes comparing the initially set size of the reordering buffer and the size of the reordering buffer to be reduced when the size of the reordering buffer is reduced. It is characterized in that the size of the reordering buffer is determined according to a larger value among them.

The effects of the electronic device and the control method of the electronic device according to the present invention will be described as follows.

According to at least one of the embodiments of the present invention, the present invention detects the packet drop amount and the network response delay time, and dynamically changes the size of the reordering buffer based on the detected network response delay time and the packet drop amount, There is an effect that it is possible to minimize the amount of drops of received packets while minimizing the delay of the network response time.

1A is a block diagram illustrating an electronic device related to the present invention.

1B and 1C are exemplary views of an example of an electronic device related to the present invention viewed from different directions.

2A is a block diagram illustrating a configuration of an electronic device wireless communication unit operable in a plurality of wireless communication systems according to an embodiment of the present invention.

FIG. 2B is a block diagram illustrating a configuration when the wireless communication unit of FIG. 2A further includes a phase control unit.

3A is a structural diagram for explaining the structure of a communication system.

3B is a block diagram illustrating the configuration of an electronic device and a wireless communication system according to an embodiment of the present invention.

4A and 4B are structural diagrams for explaining the structure of a frame according to the 5G communication method.

5A and 5B are conceptual diagrams illustrating a time and frequency resource structure according to a 5G communication method.

6 is a conceptual diagram for explaining an initial access process according to a 5G communication method.

7 is a structural diagram illustrating a system structure connected to a plurality of different networks according to a non-stand-alone (NSA) structure.

8 is a flowchart illustrating an operation process of dynamically converting a size of a reordering buffer by a modem of an electronic device according to an embodiment of the present invention.

9 is an exemplary diagram for explaining a network response delay time according to the size of a reordering buffer.

FIG. 10 is a flowchart illustrating in more detail an operation process of reducing the size of a reordering buffer during the operation process described in FIG. 8 .

Hereinafter, the embodiments disclosed in the present specification will be described in detail with reference to the accompanying drawings, but the same or similar components are assigned the same reference numerals regardless of reference numerals, and overlapping descriptions thereof will be omitted. The suffixes "module" and "part" for the components used in the following description are given or mixed in consideration of only the ease of writing the specification, and do not have a meaning or role distinct from each other by themselves. In addition, in describing the embodiments disclosed in the present specification, if it is determined that detailed descriptions of related known technologies may obscure the gist of the embodiments disclosed in the present specification, the detailed description thereof will be omitted. In addition, the accompanying drawings are only for easy understanding of the embodiments disclosed in the present specification, and the technical spirit disclosed herein is not limited by the accompanying drawings, and all changes included in the spirit and scope of the present invention , should be understood to include equivalents or substitutes.

Terms including an ordinal number, such as first, second, etc., may be used to describe various elements, but the elements are not limited by the terms. The above terms are used only for the purpose of distinguishing one component from another.

When a component is referred to as being “connected” or “connected” to another component, it is understood that the other component may be directly connected or connected to the other component, but other components may exist in between. it should be On the other hand, when it is said that a certain element is "directly connected" or "directly connected" to another element, it should be understood that no other element is present in the middle.

The singular expression includes the plural expression unless the context clearly dictates otherwise.

In the present application, terms such as "comprises" or "have" are intended to designate that a feature, number, step, operation, component, part, or combination thereof described in the specification exists, but one or more other features It should be understood that this does not preclude the existence or addition of numbers, steps, operations, components, parts, or combinations thereof.

Electronic devices described herein include mobile phones, smart phones, laptop computers, digital broadcasting terminals, personal digital assistants (PDAs), portable multimedia players (PMPs), navigation systems, and slate PCs. , tablet PCs, ultrabooks, wearable devices, for example, watch-type terminals (smartwatch), glass-type terminals (smart glass), HMD (head mounted display), etc. may be included. have.

However, it will be readily apparent to those skilled in the art that the configuration according to the embodiment described in this specification may be applied to a fixed terminal such as a digital TV, a desktop computer, and a digital signage, except when applicable only to a mobile terminal. will be.

1A to 1C, FIG. 1A is a block diagram illustrating an electronic device related to the present invention, and FIGS. 1B and 1C are conceptual views of an example of the electronic device related to the present invention viewed from different directions.

The electronic device 100 includes a wireless communication unit 110 , an input unit 120 , a sensing unit 140 , an output unit 150 , an interface unit 160 , a memory 170 , a control unit 180 , and a power supply unit 190 . ) and the like. Since the components shown in FIG. 1A are not essential for implementing the electronic device, the electronic device described herein may have more or fewer components than those listed above.

More specifically, the wireless communication unit 110 among the components, between the electronic device 100 and the wireless communication system, between the electronic device 100 and another electronic device 100, or the electronic device 100 and an external server It may include one or more modules that enable wireless communication between them. Also, the wireless communication unit 110 may include one or more modules for connecting the electronic device 100 to one or more networks. Here, the one or more networks may be, for example, a 4G communication network and a 5G communication network.

The wireless communication unit 110 may include at least one of a 4G wireless communication module 111 , a 5G wireless communication module 112 , a short-range communication module 113 , and a location information module 114 .

The 4G wireless communication module 111 may transmit and receive a 4G signal with a 4G base station through a 4G mobile communication network. In this case, the 4G wireless communication module 111 may transmit one or more 4G transmission signals to the 4G base station. In addition, the 4G wireless communication module 111 may receive one or more 4G reception signals from the 4G base station.

In this regard, Up-Link (UL) Multi-Input Multi-Output (MIMO) may be performed by a plurality of 4G transmission signals transmitted to the 4G base station. In addition, Down-Link (DL) Multi-Input Multi-Output (MIMO) may be performed by a plurality of 4G reception signals received from a 4G base station.

The 5G wireless communication module 112 may transmit and receive a 5G signal with a 5G base station through a 5G mobile communication network. Here, the 4G base station and the 5G base station may have a Non-Stand-Alone (NSA) structure. For example, the 4G base station and the 5G base station may be a co-located structure disposed at the same location in a cell. Alternatively, the 5G base station may be disposed in a stand-alone (SA) structure at a location separate from the 4G base station.

The 5G wireless communication module 112 may transmit and receive a 5G signal with a 5G base station through a 5G mobile communication network. In this case, the 5G wireless communication module 112 may transmit one or more 5G transmission signals to the 5G base station. In addition, the 5G wireless communication module 112 may receive one or more 5G reception signals from the 5G base station.

In this case, the 5G frequency band may use the same band as the 4G frequency band, and this may be referred to as LTE re-farming. Meanwhile, as the 5G frequency band, the Sub6 band, which is a band of 6 GHz or less, may be used.

On the other hand, a millimeter wave (mmWave) band may be used as a 5G frequency band to perform broadband high-speed communication. When a millimeter wave (mmWave) band is used, the electronic device 100 may perform beam forming for communication coverage expansion with a base station.

Meanwhile, regardless of the 5G frequency band, the 5G communication system may support a larger number of Multi-Input Multi-Output (MIMO) in order to improve transmission speed. In this regard, Up-Link (UL) MIMO may be performed by a plurality of 5G transmission signals transmitted to the 5G base station. In addition, Down-Link (DL) MIMO may be performed by a plurality of 5G reception signals received from a 5G base station.

Meanwhile, the wireless communication unit 110 may be in a dual connectivity (DC) state with the 4G base station and the 5G base station through the 4G wireless communication module 111 and the 5G wireless communication module 112 . In this way, the dual connection with the 4G base station and the 5G base station may be referred to as EN-DC (EUTRAN NR DC). Here, EUTRAN is an Evolved Universal Telecommunication Radio Access Network, which means a 4G wireless communication system, and NR is New Radio, which means a 5G wireless communication system.

On the other hand, if the 4G base station and the 5G base station have a co-located structure, throughput improvement is possible through inter-CA (Carrier Aggregation). Therefore, the 4G base station and the 5G base station In the EN-DC state, the 4G reception signal and the 5G reception signal may be simultaneously received through the 4G wireless communication module 111 and the 5G wireless communication module 112 .

The short-range communication module 113 is for short-range communication, and includes Bluetooth™, Radio Frequency Identification (RFID), Infrared Data Association (IrDA), Ultra Wideband (UWB), ZigBee, NFC. At least one of (Near Field Communication), Wireless-Fidelity (Wi-Fi), Wi-Fi Direct, and Wireless Universal Serial Bus (USB) technologies may be used to support short-range communication. The short-distance communication module 114, between the electronic device 100 and a wireless communication system, between the electronic device 100 and another electronic device 100, or the electronic device 100 through wireless area networks (Wireless Area Networks) ) and a network in which another electronic device 100 or an external server is located may support wireless communication. The local area network may be a local area network (Wireless Personal Area Networks).

Meanwhile, short-range communication between electronic devices may be performed using the 4G wireless communication module 111 and the 5G wireless communication module 112 . In an embodiment, short-distance communication may be performed between electronic devices using a device-to-device (D2D) method without going through a base station.

On the other hand, for transmission speed improvement and communication system convergence (convergence), carrier aggregation (CA) using at least one of the 4G wireless communication module 111 and the 5G wireless communication module 112 and the Wi-Fi communication module 113 This can be done. In this regard, 4G + WiFi carrier aggregation (CA) may be performed using the 4G wireless communication module 111 and the Wi-Fi communication module 113 . Alternatively, 5G + WiFi carrier aggregation (CA) may be performed using the 5G wireless communication module 112 and the Wi-Fi communication module 113 .

The location information module 114 is a module for acquiring a location (or current location) of an electronic device, and a representative example thereof includes a Global Positioning System (GPS) module or a Wireless Fidelity (WiFi) module. For example, if the electronic device utilizes a GPS module, it may acquire the location of the electronic device by using a signal transmitted from a GPS satellite. As another example, if the electronic device utilizes the Wi-Fi module, the location of the electronic device may be acquired based on information of the Wi-Fi module and a wireless access point (AP) that transmits or receives a wireless signal. If necessary, the location information module 114 may perform any function of the other modules of the wireless communication unit 110 to obtain data on the location of the electronic device as a substitute or additionally. The location information module 114 is a module used to obtain the location (or current location) of the electronic device, and is not limited to a module that directly calculates or obtains the location of the electronic device.

Specifically, if the electronic device utilizes the 5G wireless communication module 112, it is possible to acquire the location of the electronic device based on the information of the 5G wireless communication module and the 5G base station that transmits or receives the wireless signal. In particular, since the 5G base station of the millimeter wave (mmWave) band is deployed in a small cell having a narrow coverage, it is advantageous to obtain the location of the electronic device.

The input unit 120 includes a camera 121 or an image input unit for inputting an image signal, a microphone 122 or an audio input unit for inputting an audio signal, and a user input unit 123 for receiving information from a user, for example, , a touch key, a push key, etc.). The voice data or image data collected by the input unit 120 may be analyzed and processed as a user's control command.

The sensing unit 140 may include one or more sensors for sensing at least one of information in the electronic device, surrounding environment information surrounding the electronic device, and user information. For example, the sensing unit 140 may include a proximity sensor 141, an illumination sensor 142, an illumination sensor, a touch sensor, an acceleration sensor, a magnetic sensor, and gravity. Sensor (G-sensor), gyroscope sensor, motion sensor, RGB sensor, infrared sensor (IR sensor: infrared sensor), fingerprint sensor (finger scan sensor), ultrasonic sensor , optical sensors (eg, cameras (see 121)), microphones (see 122), battery gauges, environmental sensors (eg, barometers, hygrometers, thermometers, radiation detection sensors, It may include at least one of a thermal sensor, a gas sensor, etc.) and a chemical sensor (eg, an electronic nose, a healthcare sensor, a biometric sensor, etc.). Meanwhile, the electronic device disclosed in the present specification may combine and utilize information sensed by at least two or more of these sensors.

The output unit 150 is for generating an output related to visual, auditory or tactile sense, and includes at least one of a display unit 151 , a sound output unit 152 , a haptip module 153 , and an optical output unit 154 . can do. The display unit 151 may implement a touch screen by forming a layer structure with the touch sensor or being formed integrally with the touch sensor. Such a touch screen may function as the user input unit 123 providing an input interface between the electronic device 100 and the user, and may provide an output interface between the electronic device 100 and the user.

The interface unit 160 serves as a passage with various types of external devices connected to the electronic device 100 . This interface unit 160, a wired / wireless headset port (port), an external charger port (port), a wired / wireless data port (port), a memory card (memory card) port, for connecting a device equipped with an identification module It may include at least one of a port, an audio input/output (I/O) port, a video input/output (I/O) port, and an earphone port. In response to the connection of the external device to the interface unit 160 , the electronic device 100 may perform appropriate control related to the connected external device.

In addition, the memory 170 stores data supporting various functions of the electronic device 100 . The memory 170 may store a plurality of application programs (or applications) driven in the electronic device 100 , data for operation of the electronic device 100 , and commands. At least some of these application programs may be downloaded from an external server through wireless communication. In addition, at least some of these application programs may exist on the electronic device 100 from the time of shipment for basic functions (eg, incoming calls, outgoing functions, message reception, and outgoing functions) of the electronic device 100 . Meanwhile, the application program may be stored in the memory 170 , installed on the electronic device 100 , and driven to perform an operation (or function) of the electronic device by the controller 180 .

In addition to the operation related to the application program, the controller 180 generally controls the overall operation of the electronic device 100 . The controller 180 may provide or process appropriate information or functions to the user by processing signals, data, information, etc. input or output through the above-described components or by driving an application program stored in the memory 170 .

In addition, the controller 180 may control at least some of the components discussed with reference to FIG. 1A in order to drive an application program stored in the memory 170 . Furthermore, in order to drive the application program, the controller 180 may operate at least two or more of the components included in the electronic device 100 in combination with each other.

The power supply unit 190 receives external power and internal power under the control of the control unit 180 to supply power to each component included in the electronic device 100 . The power supply 190 includes a battery, and the battery may be a built-in battery or a replaceable battery.

At least some of the respective components may operate in cooperation with each other to implement an operation, control, or control method of an electronic device according to various embodiments described below. Also, the operation, control, or control method of the electronic device may be implemented on the electronic device by driving at least one application program stored in the memory 170 .

1B and 1C , the disclosed electronic device 100 has a bar-shaped terminal body. However, the present invention is not limited thereto, and may be applied to various structures such as a watch type, a clip type, a glass type, or a folder type in which two or more bodies are coupled to be relatively movable, a flip type, a slide type, a swing type, a swivel type, etc. . Although they will relate to specific types of electronic devices, descriptions regarding specific types of electronic devices are generally applicable to other types of electronic devices.

Here, the terminal body may be understood as a concept referring to the electronic device 100 as at least one aggregate.

The electronic device 100 includes a case (eg, a frame, a housing, a cover, etc.) forming an exterior. As illustrated, the electronic device 100 may include a front case 101 and a rear case 102 . Various electronic components are disposed in the inner space formed by the combination of the front case 101 and the rear case 102 . At least one middle case may be additionally disposed between the front case 101 and the rear case 102 .

A display unit 151 is disposed on the front surface of the terminal body to output information. As illustrated, the window 151a of the display unit 151 may be mounted on the front case 101 to form a front surface of the terminal body together with the front case 101 .

In some cases, an electronic component may also be mounted on the rear case 102 . Electronic components that can be mounted on the rear case 102 include a removable battery, an identification module, a memory card, and the like. In this case, the rear cover 103 for covering the mounted electronic component may be detachably coupled to the rear case 102 . Accordingly, when the rear cover 103 is separated from the rear case 102 , the electronic components mounted on the rear case 102 are exposed to the outside. On the other hand, a portion of the side of the rear case 102 may be implemented to operate as a radiator (radiator).

As shown, when the rear cover 103 is coupled to the rear case 102, a portion of the side of the rear case 102 may be exposed. In some cases, the rear case 102 may be completely covered by the rear cover 103 during the combination. Meanwhile, the rear cover 103 may have an opening for exposing the camera 121b or the sound output unit 152b to the outside.

The electronic device 100 includes a display unit 151 , first and second sound output units 152a and 152b , a proximity sensor 141 , an illuminance sensor 142 , a light output unit 154 , and first and second sound outputs. Cameras 121a and 121b, first and second operation units 123a and 123b, a microphone 122, an interface unit 160, and the like may be provided.

The display unit 151 displays (outputs) information processed by the electronic device 100 . For example, the display unit 151 may display execution screen information of an application program driven in the electronic device 100 or UI (User Interface) and GUI (Graphic User Interface) information according to the execution screen information. .

In addition, two or more display units 151 may exist according to an implementation form of the electronic device 100 . In this case, in the electronic device 100 , a plurality of display units may be spaced apart from each other on one surface or may be integrally disposed, or may be respectively disposed on different surfaces.

The display unit 151 may include a touch sensor for sensing a touch on the display unit 151 so as to receive a control command input by a touch method. Using this, when a touch is made to the display unit 151, the touch sensor detects the touch, and the controller 180 may generate a control command corresponding to the touch based thereon. The content input by the touch method may be letters or numbers, or menu items that can be instructed or designated in various modes.

As such, the display unit 151 may form a touch screen together with the touch sensor, and in this case, the touch screen may function as the user input unit 123 (refer to FIG. 1A ). In some cases, the touch screen may replace at least some functions of the first operation unit 123a.

The first sound output unit 152a may be implemented as a receiver that transmits a call sound to the user's ear, and the second sound output unit 152b is a loud speaker that outputs various alarm sounds or multimedia reproduction sounds. ) can be implemented in the form of

The light output unit 154 is configured to output light to notify the occurrence of an event. Examples of the event may include a message reception, a call signal reception, a missed call, an alarm, a schedule notification, an email reception, and information reception through an application. When the user's event confirmation is detected, the controller 180 may control the light output unit 154 to end the light output.

The first camera 121a processes an image frame of a still image or a moving image obtained by an image sensor in a shooting mode or a video call mode. The processed image frame may be displayed on the display unit 151 and stored in the memory 170 .

The first and second manipulation units 123a and 123b are an example of the user input unit 123 operated to receive a command for controlling the operation of the electronic device 100, and may be collectively referred to as a manipulating portion. have. The first and second operation units 123a and 123b may be adopted in any manner as long as they are operated in a tactile manner, such as by a touch, push, or scroll, while the user receives a tactile feeling. In addition, the first and second manipulation units 123a and 123b may be operated in a manner in which the user is operated without a tactile feeling through a proximity touch, a hovering touch, or the like.

Meanwhile, the electronic device 100 may be provided with a fingerprint recognition sensor for recognizing a user's fingerprint, and the controller 180 may use fingerprint information detected through the fingerprint recognition sensor as an authentication means. The fingerprint recognition sensor may be built in the display unit 151 or the user input unit 123 .

The microphone 122 is configured to receive a user's voice, other sounds, and the like. The microphone 122 may be provided at a plurality of locations and configured to receive stereo sound.

The interface unit 160 serves as a passage through which the electronic device 100 can be connected to an external device. For example, the interface unit 160 is a connection terminal for connection with another device (eg, earphone, external speaker), a port for short-range communication (eg, infrared port (IrDA Port), Bluetooth port (Bluetooth) Port), a wireless LAN port, etc.], or may be at least one of a power supply terminal for supplying power to the electronic device 100 . The interface unit 160 may be implemented in the form of a socket for accommodating an external card such as a Subscriber Identification Module (SIM), a User Identity Module (UIM), or a memory card for information storage.

A second camera 121b may be disposed on the rear side of the terminal body. In this case, the second camera 121b has a photographing direction substantially opposite to that of the first camera 121a.

The second camera 121b may include a plurality of lenses arranged along at least one line. The plurality of lenses may be arranged in a matrix form. Such a camera may be referred to as an array camera. When the second camera 121b is configured as an array camera, an image may be captured in various ways using a plurality of lenses, and an image of better quality may be obtained.

The flash 124 may be disposed adjacent to the second camera 121b. The flash 124 illuminates light toward the subject when the subject is photographed by the second camera 121b.

A second sound output unit 152b may be additionally disposed on the terminal body. The second sound output unit 152b may implement a stereo function together with the first sound output unit 152a, and may be used to implement a speakerphone mode during a call.

At least one antenna for wireless communication may be provided in the terminal body. The antenna may be built into the terminal body or formed in the case. Meanwhile, a plurality of antennas connected to the 4G wireless communication module 111 and the 5G wireless communication module 112 may be disposed on the side of the terminal. Alternatively, the antenna may be formed in a film type and attached to the inner surface of the rear cover 103 , or a case including a conductive material may be configured to function as an antenna.

Meanwhile, a plurality of antennas disposed on the side of the terminal may be implemented in four or more to support MIMO. In addition, when the 5G wireless communication module 112 operates in a millimeter wave (mmWave) band, as each of the plurality of antennas is implemented as an array antenna, a plurality of array antennas may be disposed in the electronic device.

A power supply unit 190 (refer to FIG. 1A ) for supplying power to the electronic device 100 is provided in the terminal body. The power supply unit 190 may include a battery 191 that is built into the terminal body or is detachably configured from the outside of the terminal body.

Hereinafter, a multi-communication system structure according to an embodiment and an electronic device having the same, in particular, an antenna in a heterogeneous radio system and an electronic device having the same will be described with reference to the accompanying drawings. It is apparent to those skilled in the art that the present invention may be embodied in other specific forms without departing from the spirit and essential characteristics of the present invention.

2A illustrates a configuration of a wireless communication unit of an electronic device operable in a plurality of wireless communication systems according to an embodiment. Referring to FIG. 2A , the electronic device includes a first power amplifier 210 , a second power amplifier 220 , and an RFIC 250 . Also, the electronic device may further include a modem 400 and an application processor (AP) 500 . Here, the modem 400 and the application processor AP 500 are physically implemented on a single chip, and may be implemented in a logically and functionally separated form. However, the present invention is not limited thereto and may be implemented in the form of physically separated chips depending on the application.

Meanwhile, the electronic device includes a plurality of low noise amplifiers (LNAs) 410 to 440 in the receiver. Here, the first power amplifier 210 , the second power amplifier 220 , the controller 250 , and the plurality of low-noise amplifiers 310 to 340 are all operable in the first communication system and the second communication system. In this case, the first communication system and the second communication system may be a 4G communication system and a 5G communication system, respectively.

As shown in FIG. 2A , the RFIC 250 may be configured as a 4G/5G integrated type, but is not limited thereto and may be configured as a 4G/5G separate type according to an application. When the RFIC 250 is configured as a 4G/5G integrated type, it is advantageous in terms of synchronization between 4G/5G circuits, as well as the advantage that control signaling by the modem 400 can be simplified.

Meanwhile, when the RFIC 250 is configured as a 4G/5G separate type, it may be referred to as a 4G RFIC and a 5G RFIC, respectively. In particular, when the difference between the 5G band and the 4G band is large, such as when the 5G band is configured as a millimeter wave band, the RFIC 250 may be configured as a 4G/5G separate type. As such, when the RFIC 250 is configured as a 4G/5G separate type, there is an advantage that RF characteristics can be optimized for each of the 4G band and the 5G band.

Meanwhile, even when the RFIC 250 is configured as a 4G/5G separate type, the 4G RFIC and the 5G RFIC are logically and functionally separated, and it is also possible to be physically implemented on one chip.

On the other hand, the application processor (AP, 500) is configured to control the operation of each component of the electronic device. Specifically, the application processor (AP) 500 may control the operation of each component of the electronic device through the modem 400 .

For example, the modem 400 may be controlled through a power management IC (PMIC) for low power operation of the electronic device. Accordingly, the modem 400 may operate the power circuits of the transmitter and the receiver in the low power mode through the RFIC 250 .

In this regard, when it is determined that the electronic device is in an idle mode, the application processor (AP) 500 may control the RFIC 250 through the modem 300 as follows. For example, if the electronic device is in an idle mode, the RFIC through the modem 300 so that at least one of the first and second power amplifiers 110 and 120 operates in the low power mode or is turned off 250 can be controlled.

According to another embodiment, when the electronic device is in a low battery mode, the application processor (AP) 500 may control the modem 300 to provide wireless communication capable of low power communication. For example, when the electronic device is connected to a plurality of entities among a 4G base station, a 5G base station, and an access point, the application processor (AP) 500 may control the modem 400 to enable wireless communication with the lowest power. Accordingly, the application processor (AP, 500) can control the modem 400 and the RFIC 250 to perform short-range communication using only the short-range communication module 113 even at sacrificing throughput.

According to another embodiment, when the remaining battery level of the electronic device is equal to or greater than a threshold, the modem 300 may be controlled to select an optimal wireless interface. For example, the application processor (AP) 500 may control the modem 400 to receive through both the 4G base station and the 5G base station according to the remaining battery level and available radio resource information. In this case, the application processor (AP) 500 may receive the remaining battery level information from the PMIC and the available radio resource information from the modem 400 . Accordingly, if the battery level and available radio resources are sufficient, the application processor (AP) 500 may control the modem 400 and the RFIC 250 to receive through both the 4G base station and the 5G base station.

Meanwhile, the multi-transceiving system of FIG. 2A may integrate the transmitter and receiver of each radio system into one transceiver. Accordingly, there is an advantage that a circuit part integrating two types of system signals in the RF front-end can be removed.

In addition, since the front-end components can be controlled by the integrated transceiver, the front-end components can be more efficiently integrated than when the transmission/reception system is separated for each communication system.

In addition, when each communication system is separated, it is impossible to control other communication systems as necessary, or efficient resource allocation is impossible because the system delay is increased. On the other hand, the multi-transmission/reception system as shown in FIG. 2A has an advantage in that it is possible to control other communication systems as needed, and thus system delay can be minimized, thereby enabling efficient resource allocation.

Meanwhile, the first power amplifier 210 and the second power amplifier 220 may operate in at least one of the first and second communication systems. In this regard, when the 5G communication system operates in the 4G band or the Sub6 band, the first and second power amplifiers 220 may operate in both the first and second communication systems.

On the other hand, when the 5G communication system operates in the millimeter wave (mmWave) band, one of the first and second power amplifiers 210 and 220 operates in the 4G band, and the other operates in the millimeter wave band. have.

Meanwhile, by integrating the transceiver and the receiving unit, two different wireless communication systems can be implemented with one antenna by using an antenna for both transmitting and receiving. In this case, 4x4 MIMO can be implemented using four antennas as shown in FIG. 2 . In this case, 4x4 DL MIMO may be performed through the downlink (DL).

Meanwhile, if the 5G band is the Sub6 band, the first to fourth antennas ANT1 to ANT4 may be configured to operate in both the 4G band and the 5G band. On the other hand, if the 5G band is a millimeter wave (mmWave) band, the first to fourth antennas ANT1 to ANT4 may be configured to operate in any one of the 4G band and the 5G band. In this case, if the 5G band is a millimeter wave (mmWave) band, each of a plurality of separate antennas may be configured as an array antenna in the millimeter wave band.

Meanwhile, 2x2 MIMO implementation is possible using two antennas connected to the first power amplifier 210 and the second power amplifier 220 among the four antennas. In this case, 2x2 UL MIMO (2 Tx) may be performed through the uplink (UL). Alternatively, it is not limited to 2x2 UL MIMO, and may be implemented with 1 Tx or 4 Tx. In this case, when the 5G communication system is implemented with 1 Tx, only one of the first and second power amplifiers 210 and 220 needs to operate in the 5G band. On the other hand, when the 5G communication system is implemented as 4Tx, an additional power amplifier operating in the 5G band may be further provided. Alternatively, a transmission signal may be branched in each of one or two transmission paths, and the branched transmission signal may be connected to a plurality of antennas.

On the other hand, since a switch-type splitter or a power divider is built inside the RFIC corresponding to the RFIC 250, there is no need for a separate component to be disposed outside, thereby improving component mountability. can Specifically, by using a single pole double throw (SPDT) type switch inside the RFIC corresponding to the controller 250 , it is possible to select the transmitter (TX) of two different communication systems.

In addition, FIG. 2B shows an electronic device operable in a plurality of wireless communication systems according to an embodiment of the present invention further including a phase controller 230 , a duplexer 231 , a filter 232 and a switch 233 . The configuration of the communication unit is shown.

In a frequency band such as a mmWave band, an electronic device needs to use a directional beam to secure coverage for communication with a base station. To this end, each of the antennas ANT1 to ANT4 needs to be implemented as array antennas ANT1 to ANT4 composed of a plurality of antenna elements. The phase controller 230 is configurable to control a phase of a signal applied to each antenna element of each of the array antennas ANT1 to ANT4. In this regard, the phase controller 230 may control both the magnitude and phase of a signal applied to each antenna element of each of the array antennas ANT1 to ANT4. Accordingly, since the phase control unit 230 controls both the magnitude and the phase of the signal, it may be referred to as a power and phase control unit 230 .

Therefore, by controlling the phase of a signal applied to each antenna element of each of the array antennas ANT1 to ANT4, beam-forming can be independently performed through each of the array antennas ANT1 to ANT4. have. In this regard, multiple input/output (MIMO) may be performed through each of the array antennas ANT1 to ANT4. In this case, the phase controller 230 may control the phase of a signal applied to each antenna element so that each of the array antennas ANT1 to ANT4 forms beams in different directions.

The duplexer 231 is configured to mutually separate signals of a transmission band and a reception band. At this time, the signals of the transmission band transmitted through the first and second power amplifiers 210 and 220 are applied to the antennas ANT1 and ANT4 through the first output port of the duplexer 231 . On the other hand, signals of the reception band received through the antennas ANT1 and ANT4 are received by the low noise amplifiers 310 and 340 through the second output port of the duplexer 231 .

The filter 232 may be configured to pass a signal of a transmission band or a reception band and block a signal of the remaining band. In this case, the filter 232 may include a transmit filter connected to a first output port of the duplexer 231 and a receive filter connected to a second output port of the duplexer 231 . Alternatively, the filter 232 may be configured to pass only a signal of a transmission band or only a signal of a reception band according to the control signal.

The switch 233 is configured to transmit either only a transmit signal or a receive signal. In an embodiment of the present invention, the switch 233 may be configured in a single pole double throw (SPDT) type to separate a transmission signal and a reception signal using a time division multiplexing (TDD) method. In this case, the transmission signal and the reception signal are signals of the same frequency band, and accordingly, the duplexer 231 may be implemented in the form of a circulator.

On the other hand, in another embodiment of the present invention, the switch 233 is also applicable to a frequency division multiplexing (FDD: Time Division Duplex) scheme. In this case, the switch 233 may be configured in a double pole double throw (DPDT) type to connect or block a transmission signal and a reception signal, respectively. Meanwhile, since the transmission signal and the reception signal can be separated by the duplexer 231 , the switch 233 is not necessarily required.

Meanwhile, the electronic device according to the embodiment may further include a modem 400 corresponding to a control unit. In this case, the RFIC 250 and the modem 400 may be referred to as a first controller (or first processor) and a second controller (second processor), respectively. Meanwhile, the RFIC 250 and the modem 400 may be implemented as physically separate circuits. Alternatively, the RFIC 250 and the modem 400 may be physically or logically divided into one circuit.

The modem 400 may control and process signals for transmission and reception of signals through different communication systems through the RFIC 250 . The modem 400 may be obtained through control information received from the 4G base station and/or the 5G base station. Here, the control information may be received through a physical downlink control channel (PDCCH), but is not limited thereto.

The modem 400 may control the RFIC 250 to transmit and/or receive signals through the first communication system and/or the second communication system in a specific time and frequency resource. Accordingly, the RFIC 250 may control transmission circuits including the first and second power amplifiers 210 and 220 to transmit a 4G signal or a 5G signal in a specific time period. In addition, the RFIC 250 may control receiving circuits including the first to fourth low-noise amplifiers 310 to 340 to receive a 4G signal or a 5G signal in a specific time period.

Referring to FIG. 3 , a Next Generation Radio Access Network (NG-RAN) 300 is a NG-RA (Random Access) user plane (new sublayer/PDCP/RLC/MAC/PHY) and a control plane for User Equipment (UE). (RRC) consists of gNBs 310 that provide protocol termination.

The gNBs 310 are interconnected via an Xn interface 312 . The gNB 310 is also connected to a Next Generation Core (NGC) 320 through an NG interface. More specifically, the gNB 310 is connected to an Access and Mobility Management Function (AMF) 331 through the N2 interface and to a User Plane Function (UPF) 332 through the N3 interface.

Meanwhile, the NG-C interface 321 may mean a control plane interface between the NG-RAN 300 and the NGC 320 . Also, the NG-U interface 322 may mean a user plane interface between the NG-RAN 300 and the NGC 320 .

In more detail, in the control plane, interface management and error handling (eg setting, reset, component removal, update), connected mode and mobility management (handover procedure, sequence number and state management, terminal context recovery), RAN paging support , functions related to dual connectivity (addition, reset, and release modification of secondary nodes) may be performed. Meanwhile, functions related to data transfer or data flow control may be performed in the user plane.

Meanwhile, referring to FIGS. 1A to 2B , a wireless communication system including an electronic device and the base station gNB shown in FIG. 3A will be described as follows. In this regard, FIG. 3B illustrates a block diagram of a wireless communication system to which the methods proposed in the present specification can be applied.

Referring to FIG. 3B , the wireless communication system includes a first communication device 350 and/or a second communication device 360 . ‘A and/or B’ may be construed as having the same meaning as ‘including at least one of A or B’. The first communication device may represent the base station and the second communication device may represent the terminal (or the first communication device may represent the terminal and the second communication device may represent the base station).

Base station (BS) is a fixed station (fixed station), Node B, evolved-NodeB (eNB), gNB (Next Generation NodeB), BTS (base transceiver system), access point (AP: Access Point), gNB (general) NB), 5G system, network, AI system, RSU (road side unit), may be replaced by terms such as robot.

In addition, the terminal (Terminal) may be fixed or have mobility, UE (User Equipment), MS (Mobile Station), UT (user terminal), MSS (Mobile Subscriber Station), SS (Subscriber Station), AMS (Advanced Mobile) Station), WT (Wireless terminal), MTC (Machine-Type Communication) device, M2M (Machine-to-Machine) device, D2D (Device-to-Device) device, vehicle, robot, AI module may be replaced by terms such as

The first communication device 350 and the second communication device 360 are a processor 351,361, a memory 354,364, one or more Tx / Rx RF module (radio frequency module, 355,365), Tx processor (352,362) , Rx processors 353 and 363, and antennas 356 and 366. The processors 351 and 361 implement the previously salpin functions, processes and/or methods and the functions, processes and/or methods to be described later. More specifically, in the DL (communication from the first communication device 350 to the second communication device 360 ), an upper layer packet from the core network (NGC) is provided to the processor 351 . The processor 351 implements the function of the L2 layer. In the DL, the processor 351 provides multiplexing between logical channels and transport channels, radio resource allocation, to the second communication device 360 , and is responsible for signaling to the second communication device 360 .

The transmit (TX) processor 352 implements various signal processing functions for the L1 layer (ie, the physical layer). The signal processing function facilitates forward error correction (FEC) in the second communication device 360 , and includes coding and interleaving. The coded and modulated symbols are divided into parallel streams, each stream mapped to OFDM subcarriers, multiplexed with a reference signal (RS) in the time and/or frequency domain, and using Inverse Fast Fourier Transform (IFFT) are combined together to create a physical channel carrying a stream of time domain OFDMA symbols.

The OFDM stream is spatially precoded to generate multiple spatial streams. Each spatial stream may be provided to a different antenna 356 via a separate Tx/Rx module (or transceiver) 355 . Each Tx/Rx module may modulate an RF carrier with a respective spatial stream for transmission.

In the second communication device 360 , each Tx/Rx module (or transceiver) 365 receives a signal via a respective antenna 366 of each Tx/Rx module 365 . Each Tx/Rx module 365 recovers information modulated with an RF carrier and provides it to a receive (RX) processor 363 . The RX processor 363 implements various signal processing functions of layer 1. The RX processor 363 may perform spatial processing on the information to recover any spatial streams destined for the second communication device 360 . If multiple spatial streams are directed to the second communication device 360 , they may be combined into a single OFDMA symbol stream by multiple RX processors 363 . The RX processor 363 transforms the OFDMA symbol stream from the time domain to the frequency domain using a Fast Fourier Transform (FFT).

The frequency domain signal includes a separate OFDMA symbol stream for each subcarrier of the OFDM signal. The symbols and reference signal on each subcarrier are recovered and demodulated by determining the most probable signal placement points transmitted by the first communication device. These soft decisions may be based on channel estimate values. The soft decisions are decoded and deinterleaved to recover the data and control signal originally transmitted by the first communication device 350 on the physical channel. Corresponding data and control signals are provided to the processor 361 .

The UL (second communication device 360 to first communication device 350 communication) is handled in the first communication device 350 in a manner similar to that described with respect to the receiver function in the second communication device 360 . . Each Tx/Rx module 365 receives a signal via a respective antenna 366 . Each Tx/Rx module 365 provides an RF carrier and information to the RX processor 363 . The processor 361 may be associated with a memory 364 that stores program code and data. Memory 364 may be referred to as a computer-readable medium.

Meanwhile, referring to the above drawings, a 5G wireless communication system, that is, 5G new radio access technology (NR) may be provided. In this regard, as more and more communication devices require a larger communication capacity, there is a need for improved mobile broadband communication compared to the existing radio access technology. In addition, massive MTC (Machine Type Communications), which provides various services anytime, anywhere by connecting multiple devices and objects, is also one of the major issues to be considered in next-generation communication. In addition, communication system design considering reliability and latency sensitive service/terminal is being discussed. As described above, the introduction of next-generation radio access technology considering eMBB (enhanced mobile broadband communication), Mmtc (massive MTC), URLLC (Ultra-Reliable and Low Latency Communication), etc. is being discussed, and in this specification, the technology is referred to as NR for convenience. . NR is an expression showing an example of 5G radio access technology (RAT).

A new RAT system including NR uses an OFDM transmission scheme or a similar transmission scheme. The new RAT system may follow OFDM parameters different from those of LTE. Alternatively, the new RAT system may follow the existing numerology of LTE/LTE-A, but may have a larger system bandwidth (eg, 100 MHz). Alternatively, one cell may support a plurality of numerologies. That is, electronic devices operating with different numerology can coexist in one cell.

In this regard, in the case of 4G LTE, since the maximum bandwidth of the system is limited to 20 MHz, a single sub-carrier spacing (SCS) of 15 KHz is used. However, in the case of 5G NR, since a channel bandwidth of 5 MHz to 400 MHz is supported, FFT processing complexity may increase to process the entire bandwidth through one subcarrier interval. Accordingly, the subcarrier interval used for each frequency band may be extended and applied.

Numerology corresponds to one subcarrier spacing in the frequency domain. By scaling the reference subcarrier spacing by an integer N, different numerology can be defined. In this regard, Fig. 4A shows an example of a frame structure in NR. Meanwhile, FIG. 4B shows a change in slot length according to a change in subcarrier spacing in NR.

An NR system can support multiple numerologies. Here, the numerology may be defined by a subcarrier spacing and a cyclic prefix (CP) overhead. In this case, a plurality of subcarrier spacings may be derived by scaling the basic subcarrier spacing by an integer N (or, ). Also, although it is assumed that very low subcarrier spacing is not used at very high carrier frequencies, the numerology used can be selected independently of the frequency band. In addition, in the NR system, various frame structures according to a number of numerologies may be supported.

Hereinafter, an Orthogonal Frequency Division Multiplexing (OFDM) numerology and frame structure that can be considered in an NR system will be described. A number of OFDM numerologies supported in the NR system may be defined as shown in Table 1.

μ	Df =2 μ * 15 [kHz]	Cyclic prefix (CP)
0	15	Normal
One	30	Normal
2	60	Normal, Extended
3	120	Normal
4	240	Normal

NR supports multiple numerology (or subcarrier spacing (SCS)) to support various 5G services. For example, when SCS is 15kHz, it supports a wide area in traditional cellular bands, and when SCS is 30kHz/60kHz, dense-urban, lower latency and a wider carrier bandwidth, and when the SCS is 60 kHz or higher, a bandwidth greater than 24.25 GHz to overcome phase noise.

The NR frequency band is defined as a frequency range of two types (FR1, FR2). FR1 is the sub 6GHz range, and FR2 is the above 6GHz range, which may mean a millimeter wave (mmW).

Table 2 below shows the definition of the NR frequency band.

Frequency Range designation	Corresponding frequency range	Subcarrier Spacing
FR1	450MHz - 6000MHz	15, 30, 60 kHz
FR2	24250MHz - 52600MHz	60, 120, 240 kHz

With respect to the frame structure in the NR system, the sizes of various fields in the time domain are expressed as multiples of a specific time unit. 3A is an example of SCS of 60 kHz, and one subframe may include four slots. One subframe = {1,2,4} slots shown in FIG. 3 is an example, and the number of slot(s) that may be included in one subframe may be one, two, or four.

Also, a mini-slot may contain 2, 4 or 7 symbols, or may contain more or fewer symbols.

Referring to FIG. 4B, the subcarrier interval of 5G NR phase I and the OFDM symbol length accordingly are shown. Each subcarrier interval is extended by a power of 2, and the symbol length is reduced in inverse proportion to this. In FR1, subcarrier spacings of 15 kHz, 30 kHz and 60 kHz are available depending on the frequency band/bandwidth. In FR2, 60 kHz and 120 kHz can be used for the data channel, and 240 kHz can be used for the synchronization signal.

In 5G NR, a basic unit of scheduling is defined as a slot, and the number of OFDM symbols included in one slot may be limited to 14 as shown in FIG. 3A or 3B regardless of subcarrier spacing. Referring to FIG. 3B , when a wide subcarrier interval is used, the length of one slot is shortened in inverse proportion to reduce transmission delay in a radio section. In addition, in order to efficiently support ultra reliable low latency communication (uRLLC), scheduling in units of minislots (eg, 2, 4, 7 symbols) may be supported as described above in addition to scheduling in units of slots.

In consideration of the above-described technical characteristics, the slots in 5G NR described herein may be provided at the same interval as the slots of 4G LTE or may be provided as slots of various sizes. As an example, the slot interval in 5G NR may be configured as 0.5 ms, which is the same as the slot interval of 4G LTE. As another example, the slot interval in 5G NR may be configured as 0.25 ms, which is a narrower interval than the slot interval of 4G LTE.

In this regard, the 4G communication system and the 5G communication system may be referred to as a first communication system and a second communication system, respectively. Accordingly, the first signal (first information) of the first communication system may be a signal (information) in a 5G NR frame with a slot interval scalable to 0.25 ms, 0.5 ms, or the like. On the other hand, the second signal (second information) of the second communication system may be a signal (information) in a 4G LTE frame with a fixed slot interval of 0.5 ms.

Meanwhile, the first signal of the first communication system may be transmitted and/or received through a maximum bandwidth of 20 MHz. On the other hand, the second signal of the second communication system may be transmitted and/or received through a variable channel bandwidth from 5 MHz to 400 MHz. In this regard, the first signal of the first communication system may be FFT-processed with a single sub-carrier spacing (Sub-Carrier Spacing, SCS) of 15 KHz.

On the other hand, the second signal of the second communication system may be FFT-processed at subcarrier intervals of 15 kHz, 30 kHz, and 60 kHz according to the frequency band/bandwidth. In this case, the second signal of the second communication system may be modulated and frequency-converted to the FR1 band and transmitted through the 5G Sub6 antenna. Meanwhile, the FR1 band signal received through the 5G Sub6 antenna may be frequency-converted and demodulated. Thereafter, the second signal of the second communication system may be IFFT-processed at subcarrier intervals of 15 kHz, 30 kHz, and 60 kHz according to the frequency band/bandwidth.

Meanwhile, the second signal of the second communication system may be FFT-processed at subcarrier intervals of 60 kHz, 120 kHz, and 240 kHz according to frequency band/bandwidth and data/synchronization channel. In this case, the second signal of the second communication system may be modulated to the FR2 band and transmitted through the 5G mmWave antenna. On the other hand, the FR2 band signal received through the 5G mmWave antenna can be frequency-converted and demodulated. Thereafter, the second signal of the second communication system may be IFFT-processed through subcarrier intervals of 60 kHz, 120 kHz, and 240 kHz according to frequency band/bandwidth and data/synchronization channel.

In 5G NR, symbol-level temporal alignment can be used for transmission schemes using various slot lengths, mini-slots, and different subcarrier spacings. Accordingly, it provides flexibility for efficiently multiplexing various communication services such as enhancement mobile broadband (eMBB) and ultra reliable low latency communication (uRLLC) in the time domain and frequency domain. Also, unlike 4G LTE, 5G NR may define uplink/downlink resource allocation at a symbol level within one slot as shown in FIG. 3B . In order to reduce hybrid automatic repeat request (HARQ) delay, a slot structure capable of transmitting HARQ ACK/NACK directly within a transmission slot may be defined. Such a slot structure may be referred to as a self-contained structure.

Unlike 4G LTE, 5G NR can support a common frame structure constituting an FDD or TDD frame through a combination of various slots. Accordingly, the transmission direction of an individual cell can be freely and dynamically adjusted according to traffic characteristics by introducing a dynamic TDD scheme.

Meanwhile, the resource structure of the time domain and the frequency domain may define an NR resource grid as shown in FIG. 5 . According to a subcarrier spacing (SubCarrier Spacing: SCS), the resource grid may be changed as the number of available subcarriers and OFDM symbols varies. That is, with respect to each numerology and carrier, NR is a value obtained by multiplying the maximum number of resource blocks per subcarrier interval by the number of subcarriers per resource block, and a value determined by the number of OFDM symbols per subframe as the length. A resource grid can be defined.

In addition, to support agile and efficient use of TDD resources, NR may implement a flexible slot structure. For example, as shown in (a) and (b) of FIG. 5B , all slots may be allocated as DL (DownLink) and all UL (UploadLink) slots. Alternatively, a mixture of DL and UL may be used to allocate service asymmetric traffic. DL control takes place at the beginning of the slot, UL control can happen at the end, statically configure the mixed DL/UL slot as in LTE DL/UL TDD configuration or dynamically change the allocation of DL/UL mix can Thus, efficiency and scheduling can be improved depending on traffic requirements.

Meanwhile, for initial access of the NR system, the base station may repeatedly transmit a synchronization signal and system information using a plurality of beams. And the electronic device performs initial beam acquisition during the random access process.

The Synchronization Signal Block (SSB), which is a unit block in which SS (Synchronization Signal) and PBCH (Physical Broadcast Channel) are transmitted, can be transmitted even in places other than the center of the system band, and when wideband operation is supported, multiple SSBs can be transmitted. may be 4 consecutive OFDM symbols and 20 resource blocks (RBs) are used to configure the SSB. In addition, the SSB of the NR system may be transmitted at a location other than the center frequency of the frequency band used by the network.

To this end, a synchronization raster, which is a candidate frequency location where the electronic device should find the SSB, may be defined. The number of blind detections can be reduced by defining the synchronization raster longer on the frequency axis than the channel raster, which is information on the position of the center frequency of the channel for initial access, in consideration of the complexity and detection speed of the initial synchronization.

Meanwhile, the SSB can be transmitted up to 64 times during 5 ms. A plurality of SSBs are transmitted with different transmission beams within 5ms time, and the electronic device may perform detection on the assumption that the SSB is transmitted every 20ms period used for transmission. The number of beams that can be used for SSB transmission within 5 ms time can be used as the frequency band increases. Up to 4 SSB beams can be transmitted below 3 GHz, and SSB can be transmitted using up to 8 different beams in the frequency band of 3 to 6 GHz and up to 64 different beams in the frequency band above 6 GHz. The configuration of the SSB and the beam sweeping transmission method are as shown in (a) and (b) of FIG. 6 .

On the other hand, in the NR system, the random access channel is a signal for transmitting information about initial beam acquisition in a multi-beam environment along with transmission of an uplink signal for an electronic device to notify the base station of initial access and signal transmission for acquiring uplink timing. and transmission of a signal for requesting beam failure recovery and transmission of a signal for requesting other system information (OSI) transmission.

In the initial access process, the electronic device finds an SSB having an optimal beam direction, and then transmits a preamble through a random access channel resource connected to the detected SSB to indirectly exchange information on which beam to transmit and receive with the base station. can do. After completing the initial connection, the transmission/reception beam update process may be performed through beam operation. The NR system has a long preamble format having a slot unit length and an OFDM symbol unit length to support various service types from macro cells such as LTE systems to small cells using multiple beams in a high frequency band. Various preambles such as a short preamble format may be used.

The random access channel preamble transmission basically operates in a contention-based transmission method in the initial access process, and power ramping may be used for retransmission. In this case, when the preamble is retransmitted in a beam different from the previous beam, the retransmission may be performed with the same transmission power without performing a power increase.

Meanwhile, according to the NSA structure according to the MRDC (Multi RAT (Radio Access Technology) Dual Connectivity), the electronic device may be connected to a network according to a plurality of different communication methods at the same time, and may receive data from the connected networks. 7 illustrates an E-UTRA New Radio Dual Connectivity (EN-DC) structure as such an NSA structure.

Referring to FIG. 7 , the electronic device may be simultaneously connected to the eNB 700 serving as a master node and the en-gNB 710 serving as a secondary node.

Here, the eNB 700 may create an S1-MME control connection with the MME, which is a control entity of the EPC, which is the core of the LTE system. In addition, transmission and reception of NAS control messages can be relayed between the MME and the electronic device through the S1-MME control connection. In addition, an RRC connection can be created with an electronic device using LTE Radio technology, and an RRC state can be managed based on the connection.

On the other hand, the en-gNB 710 may be involved only in an additional data connection for transmitting and receiving data having a capacity of a certain size or more, without being involved in the control connection and NAS message relay related to the EPC.

Meanwhile, for a DC (Dual Connectivity) connection, the electronic device may first attach to the EPC through the eNB 700 . In addition, a Packet Data Network (PDN) connection and bearers may be created. And when the PDN connection and the bearer are created, the electronic device may be in an RRC connected state with the eNB 700 .

Then, the master node, the eNB 700 , the current congestion state of the eNB 700 , the data transmission/reception status of the electronic device, and the existence of the en-gNB 710 , which will serve as a secondary node around the eNB 700 , and DC use of the electronic device may be determined in consideration of the congestion state of the en-gNB 710 .

And when DC use is determined, the eNB 700 may transmit/receive an X2-C control message to and from the en-gNB 710 through the X2 interface. In addition, through the exchange of control messages, it is possible to execute a procedure in which some of the bearers that service data transmission/reception to electronic devices are serviced through the en-gNB 710 with the LTE radio resource controlled by the eNB 700 .

Therefore, some of the bearers that provide data transmission/reception service to the electronic device with LTE radio resources are transferred to the en-gNB 710, and the electronic device uses the transferred NR radio resources controlled by the en-gNB 710 through some of the bearers. can be used to send and receive data. Accordingly, the electronic device may be connected to both the eNB 700 and the en-gNB 710 to transmit/receive data through both LTE, that is, 4G radio resource and NR, that is, 5G radio resource.

Meanwhile, the specific operation and function of an electronic device having a transmission/reception system that can be connected to both a 4G network and a 5G network through the NSA structure will be described below.

8 is a flowchart illustrating an operation process of dynamically converting the size of a reordering buffer by the modem 270 of the electronic device 100 according to an embodiment of the present invention. And FIG. 9 is an exemplary diagram for explaining a network response delay time according to the size of the reordering buffer.

Referring first to FIG. 8 , the modem 270 of the electronic device 100 according to an embodiment of the present invention may first rearrange packets received from the network in the reordering buffer. For example, when a packet having a size larger than the remaining capacity of the reordering buffer is received, the corresponding packet may not be stored in the reordering buffer and may be dropped. As described above, when the electronic device 100 is connected to a 5G network as well as a 4G network to receive packets, a packet having a larger size than a packet received from the 4G network is received through the 5G network. have.

In this case, when a packet is dropped, the dropped packet may be lost. Accordingly, packets having a serial number after the dropped packet may be received in the reordering buffer. Then, the modem 270 may detect dropped packets based on the serial numbers of the packets rearranged in the reordering buffer (S800).

Meanwhile, the step S800 may be a step of detecting the number of packets dropped at a predetermined period of time. For example, the period for detecting the number of dropped packets may be 1.9 seconds based on Quanta Cloud Technology (QCT) Software Defined Everything (SDx) 50.

If the number of packets dropped during a preset period is detected in step S800, the modem 270 may determine whether the number of dropped packets is equal to or greater than a preset number (a first number) (S802). If the number of dropped packets is less than the first number, the process may proceed to step S800 again to detect the number of packets dropped during a preset period again.

However, if it is determined in step S802 that the number of dropped packets is equal to or greater than the first number, the modem 270 may check whether the currently set size of the reordering buffer is an initial value, that is, an initially set size ( S804). And if the size of the reordering buffer is an initial value, the size of the reordering buffer may be expanded according to a preset ratio (S814). Then, the process proceeds to step S800 again to detect the number of packets dropped during a preset period again.

Here, the preset ratio may be determined according to the size of the reordering buffer. For example, the preset ratio may be an initial value of the reordering buffer as a reference. In this case, since the initial value of the reordering buffer is a preset value, the size of the buffer extended in step S814 may be constant.

Meanwhile, the preset ratio may be determined according to the size of the current reordering buffer. In this case, if the size of the reordering buffer is in a state in which the size of the reordering buffer is expanded than the initial size, the size of the reordering buffer corresponding to the preset ratio may be increased. That is, as the size of the current reordering buffer increases, the size of the reordering buffer that increases according to the preset ratio may become larger.

However, if the size of the reordering buffer is not the initially set size as a result of the check in step S804, the modem 270 may determine that the reordering buffer has been expanded at least once. Accordingly, the modem 270 may further consider the network response delay time, determine whether the network response delay time is acceptable, and change the size of the reordering buffer according to the determination result.

To this end, if the size of the reordering buffer is not the initial size as a result of the check in step S804, the modem 270 may detect a network response delay time (S806). For example, the network response delay time may vary depending on the size of the currently set reordering buffer. FIG. 9 shows network response delay times that vary according to the size of the reordering buffer as described above.

Referring to FIG. 9 , FIGS. 9 ( a ) and 9 ( b ) show an example in which the sizes of the reordering buffers are different from each other. Of these, FIG. 9(b) shows an example in which the size of the reordering buffer is set to be larger than that of FIG. 9(a). In the following description, a reordering buffer of a smaller size shown in FIG. 9(a) is used as a first reordering buffer 900, and a reordering buffer of a larger size shown in FIG. 9(b) is used as a second reordering buffer. It will be referred to as a reordering buffer 950 . In addition, for better understanding, each slot indicating the storage space of each reordering buffer is indicated as 0 for an empty state and 1 for a state in which a packet is stored.

First, referring to FIG. 9A , the upper diagram of FIG. 9A shows an example in which the first packet is first stored in the empty first reordering buffer 900 . In this case, assuming that the size of the first packet is the same as the size of the first slot, as shown in the upper drawing of FIG. 9(a), the first reordering buffer 900 has the remaining 9 slots out of 10 slots. At least one packet having a size less than or equal to the combined capacity may be further received.

For example, the first reordering buffer 900 receives a packet having a size larger than the remaining capacity, for example, a packet having a size exceeding the size of the sum of the nine slots, the first reordering buffer 900 transmits the corresponding packet. can be dropped. On the other hand, one or more packets smaller than the sum of the remaining 9 slots may be received. In this case, the received packets may be sequentially stored in the first reordering buffer 900 .

Meanwhile, when packets are received in the first reordering buffer 900 and the first reordering buffer 900 is full as shown in the lower part of FIG. 9 (a), the modem 270 performs the first reordering operation. Packets stored in the buffer 900 may be output. The output data can then be distributed according to each required application. And the applications can process the distributed data, perform a requested function, that is, provide a response according to the request.

Accordingly, the network response delay time may be a time until the packets stored in the reordering buffer are output and the packets are filled again in a state in which the reordering buffer is empty, and the packets are output again. That is, after packets stored in the reordering buffer are output, it may be a time until the reordering buffer is output again. Accordingly, the modem 270 may detect the time until the output of the reordering buffer is made again after the output of the reordering buffer is made as the network response delay time in step S806.

Meanwhile, when the size of the reordering buffer is small, the time until the packets are output because the buffer is full according to the reception of a packet may also be shortened. Accordingly, the network response delay time may also be shortened. Therefore, as shown in (a) and (b) of Figure 9, in the case of the second reordering buffer 950 having a larger capacity than the first reordering buffer 900, the network response delay (second network response) The delay 960) time may be longer than the network response delay (first network response delay 910) time of the first reordering buffer 900 .

Meanwhile, step S806 may be a step of detecting an average of the network response delay times measured during a preset period. In addition, the preset period may be the same as the period for detecting the number of dropped packets in step S800. Therefore, preferably, if the period for detecting the number of dropped packets is 1.9 seconds, the modem 270 may calculate the average of the network response delay times detected during the same 1.9 seconds. In this case, the modem 270 may synchronize the period of the network response delay time and the period of detecting the number of dropped packets to detect the number of packets dropped during the same time period and detect the average of the network response delay time. have.

Meanwhile, when the network delay time is detected in step S806, the modem 270 may compare the detected network delay time with a preset allowable time, that is, the first delay time (S808). In addition, if the detected network delay time exceeds the first delay time as a result of the determination in step S808, the size of the reordering buffer may be reduced according to a preset ratio despite the number of packet drops (S812). On the other hand, if it is determined in step S808 that the detected network delay time is equal to or less than the first delay time, the modem 270 may expand the size of the reordering buffer according to a preset ratio (S810). Here, the preset ratio for extending or hiding the reordering buffer may be the same ratio.

For example, the preset ratio may be based on the initial size of the reordering buffer or based on the size of the current reordering buffer. In this case, based on the initial size of the reordering buffer, the size of the reordering buffer may be expanded or reduced by a predetermined size. On the other hand, when the current reordering size is used as a reference, the size to be expanded or reduced according to the size of the current reordering buffer may be determined differently.

Meanwhile, when the size of the reordering buffer is expanded or reduced through step S810 or S812, the modem 270 may proceed to step S800 again. And by performing step S800 again, the process of FIG. 8 can be performed again.

Meanwhile, as described above, when the preset ratio is based on the size of the current reordering buffer, the size to be reduced or expanded may be different from each other. Accordingly, in the case of step S812 of FIG. 8 , the method may further include a step of preventing the size of the reordering buffer from being smaller than a preset initial value.

FIG. 10 is a flowchart illustrating the operation process of step S812 of FIG. 8 in more detail in this case.

Referring to FIG. 10 , when step S812 of FIG. 8 is performed, the modem 270 may calculate in advance the size of the reordering buffer to be reduced from the size of the current reordering buffer. In addition, it may be checked whether the calculated size of the reordering buffer is equal to or greater than a preset initial size (S1000).

And, as a result of the check in step S1000, if the calculated size of the reordering buffer is equal to or greater than a preset initial size, the modem 270 may reduce the size of the reordering buffer according to a preset ratio (S1002). However, if the calculated size of the reordering buffer is less than the preset initial size, the modem 270 may set the size of the reordering buffer as the initial size (S1004). And by performing step S800 of FIG. 8 again, the process of FIG. 8 can be performed again. In this case, since the size of the reordering buffer is reduced to the initial size, if the number of packet drops detected during the preset period is equal to or greater than the first number as a result of the comparison in step S802, the process proceeds to step S812 through step S804 and The size may be expanded again by a preset ratio.

Meanwhile, in the electronic device supporting the 4G network and the 5G network, the technical effects of the present invention will be described as follows.

The present invention detects the packet drop amount and the network response delay time, and dynamically changes the size of the reordering buffer based on the detected network response delay time and the packet drop amount, thereby minimizing the delay in the network response time, and There is an effect that it is possible to minimize the drop amount of packets.

Meanwhile, in the above description, it is assumed that a double connection between the 4G network and the 5G network is performed, but the present invention is not limited thereto. That is, it goes without saying that the present invention can be applied to any number of cases where electronic devices are simultaneously connected not only to 4G networks and 5G networks but also to heterogeneous networks having different maximum bandwidths.

Further scope of applicability of the present invention will become apparent from the following detailed description. However, it should be understood that the detailed description and specific embodiments such as preferred embodiments of the present invention are given by way of illustration only, since various changes and modifications within the spirit and scope of the present invention may be clearly understood by those skilled in the art.

In relation to the present invention described above, in an electronic device having a plurality of antennas, the antenna including the processors 180 , 1250 , and 1400 , the design of the control unit controlling the same, and the control method thereof are computer-readable in a program recorded medium. It is possible to implement it as an existing code. The computer-readable medium includes any type of recording device in which data readable by a computer system is stored. Examples of computer-readable media include Hard Disk Drive (HDD), Solid State Disk (SSD), Silicon Disk Drive (SDD), ROM, RAM, CD-ROM, magnetic tape, floppy disk, optical data storage device, etc. There is also a carrier wave (eg, transmission over the Internet) that is implemented in the form of. In addition, the computer may include the control unit 180 of the terminal. Accordingly, the above detailed description should not be construed as restrictive in all respects but as exemplary. The scope of the present invention should be determined by a reasonable interpretation of the appended claims, and all modifications within the equivalent scope of the present invention are included in the scope of the present invention.

Claims (15)

1. at least one communication module connected to a plurality of different networks to transmit and receive packets of different sizes through the different networks; and;

   Detecting the number of packets dropped during a preset first period from packets received through the communication module, and detecting a network response delay time based on the time when packets stored in a reordering buffer are output,

   and a modem that changes the size of the reordering buffer based on a result of comparing the network response delay time with a preset first delay time when the number of dropped packets is equal to or greater than a preset first number electronic devices that do.
2. According to claim 1, wherein the modem,

   When the number of dropped packets exceeds the first number, the size of the reordering buffer is detected, and when the size of the reordering buffer is the initially set size, the size of the reordering buffer is increased by a preset ratio Electronic device, characterized in that.
3. The method of claim 2, wherein the modem comprises:

   The electronic device of claim 1, wherein the size of the reordering buffer is increased by the predetermined ratio based on the initially set size of the reordering buffer.
4. The method of claim 2, wherein the modem comprises:

   The electronic device of claim 1, wherein the size of the reordering buffer is increased by the preset ratio based on the current size of the reordering buffer.
5. The method of claim 2, wherein the modem comprises:

   When the size of the reordering buffer is not an initially set size, comparing the network response delay time with the first delay time,

   If the network response delay time is greater than the first delay time, reduce the size of the reordering buffer,

   When the network response delay time is less than the first delay time, the size of the reordering buffer is increased.
6. The method of claim 5, wherein the modem comprises:

   The electronic device according to claim 1, wherein the size of the reordering buffer is increased or decreased by the predetermined ratio based on the initially set size of the reordering buffer.
7. The method of claim 5, wherein the modem comprises:

   The electronic device of claim 1, wherein the size of the reordering buffer is increased or decreased by the preset ratio based on the current size of the reordering buffer.
8. The method of claim 5, wherein the modem comprises:

   The electronic device, characterized in that during the second preset period, calculating an average of the output times of the packets stored in the reordering buffer, and detecting as the network response delay time.
9. 9. The method of claim 8,

   The first period and the second period are the same time,

   The modem is

   and detecting the number of packets dropped during the same time period and a network response delay time by synchronizing the first period and the second period.
10. The method of claim 3, wherein the modem comprises:

    When the size of the reordering buffer is reduced, comparing the initially set size of the reordering buffer and the size of the reordering buffer to be reduced, and determining the size of the reordering buffer according to the larger of the two Electronics.
11. According to claim 1, wherein a plurality of different networks,

    An electronic device characterized in that the networks have different maximum bandwidths.
12. receiving and storing packets of different sizes through a plurality of different networks in a reordering buffer;

    detecting the number of packets dropped during a preset first period through packet reordering of the reordering buffer;

    detecting a network response delay time based on a time at which packets stored in the reordering buffer are output;

    comparing the network response delay time with a preset first delay time when the number of dropped packets is equal to or greater than a preset first number; and;

    and changing the size of the reordering buffer based on the comparison result.
13. The method of claim 12, wherein the comparing the network response delay time with a preset first delay time comprises:

    checking whether the size of the reordering buffer is an initially set size; and;

    As a result of the check, if the size of the reordering buffer is an initially set size, increasing the size of the reordering buffer according to a preset ratio.
14. 13. The method of claim 12, wherein detecting the network response delay time comprises:

    During the second preset period, the method of controlling an electronic device, characterized in that the detecting as the network response delay time by calculating an average of the output times of the packets stored in the reordering buffer.
15. The method of claim 12, wherein changing the size of the reordering buffer comprises:

    When the size of the reordering buffer is reduced, comparing the initially set size of the reordering buffer and the size of the reordering buffer to be reduced, and determining the size of the reordering buffer according to the larger of the two Control method of electronic equipment.

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