KR20230171357A - Electronic device for providing audio service and operating method thereof - Google Patents

Abstract

According to one embodiment, the electronic device may include a communication circuit and at least one processor operatively connected to the communication circuit, wherein the at least one processor communicates with at least one external electronic device through the communication circuit. Establishing a communication link, verifying the quality of the communication link, discarding at least one of the packets to be transmitted during a set time period on the communication link based on the quality of the communication link being below a threshold quality, and It may be configured to transmit, through a communication circuit, a packet indicating that the at least one packet is discarded to the at least one external electronic device.
Other embodiments may be possible.

Description

Electronic device providing audio service and operating method thereof {ELECTRONIC DEVICE FOR PROVIDING AUDIO SERVICE AND OPERATING METHOD THEREOF}

This disclosure relates to an electronic device that provides audio services and a method of operating the same.

Recently, with the development of information and communication technology, various wireless communication technologies and various services are being developed. In particular, the Bluetooth method, one of the short-distance communication methods, is being actively used, and electronic devices using the Bluetooth method are also widely used. In particular, a pair of ear buds that can be worn on both ears of the user are widely used as an ear-wearable device. Wearable devices can then provide a variety of functions. For example, an ear wearable device can use a microphone to input and confirm the user's voice, transmit audio data related to the user's voice to an electronic device (e.g. a smartphone), and use a speaker to transmit audio data to the electronic device. Audio data received from can be output.

The Bluetooth method may include a Bluetooth legacy (or Bluetooth classic) method and/or a Bluetooth low energy (BLE) method. Electronic devices that provide a low energy audio (LE Audio) service based on the BLE method (e.g., a first electronic device (e.g., left earbud) and a second electronic device (e.g., right ) earbuds)) each independently establishes a communication link (e.g. a connected isochronous stream (CIS) connection) with an external electronic device (e.g. a smartphone) and transmits data to and from the external electronic device via the established communication link. can be sent and received.

When the first electronic device, the second electronic device, and the external electronic device connected based on the BLE method provide an audio service such as music play, the first electronic device and the second electronic device Each can operate as an audio sink device, and the external electronic device can operate as an audio source device. For example, the first electronic device serves as a first audio channel (e.g., left audio channel), and the second electronic device serves as a second audio channel (e.g., right audio channel). can do. Each of the first electronic device and the second electronic device is an external electronic device at the time of setting, and a device capability identifier (ID) related to the audio channel role performed by each of the first electronic device and the second electronic device ( Example: CIS ID) can be transmitted. For example, the setting point may be the point in time when each of the first and second electronic devices is connected to an external electronic device, or the point in time when a service (eg, audio service) is started. The external electronic device can confirm the audio channel role performed by each of the first electronic device and the second electronic device based on the device capability ID received from each of the first electronic device and the second electronic device, and based on the confirmed audio channel role Thus, audio data can be transmitted and received with each of the first electronic device and the second electronic device.

While the first electronic device, the second electronic device, and the external electronic device are providing audio services based on the BLE method, it becomes impossible to provide normal audio services due to changes in the radio frequency (RF) environment. You can. For example, the RF environment includes a first communication link (e.g., CIS connection) between an external electronic device that is an audio source device and a first electronic device that is an audio sink device, and a second electronic device that is an audio sink device that is different from the external electronic device. It may affect the quality of each of the second communication link, which is a communication link between devices, or the third communication link, which is a communication link between a first electronic device and a second electronic device. If the quality of at least one of the first communication link, the second communication link, or the third communication link falls below the threshold quality due to a change in the RF environment, normal transmission and reception of audio data through the communication link having a quality below the threshold quality will not occur. It may be impossible. For example, because normal transmission and reception of audio data may not be possible through a communication link with a quality below the threshold quality, cases in which sound breaks, sound distortions, roars, and/or silence occur. Various cases such as this case may occur, and service quality may deteriorate as a result.

Accordingly, even if the quality of any one of the communication links between the first electronic device, the second electronic device, or the external electronic device falls below the threshold quality, the first electronic device, the second electronic device, and the external electronic device There is a need for a method that allows devices to stably provide high quality audio services.

An embodiment of the present disclosure may provide an electronic device that provides an audio service and a method of operating the same.

An embodiment of the present disclosure is to perform a packet drop operation on the communication link below the threshold quality when the quality of at least one communication link among the communication links between electronic devices providing an audio service is below the threshold quality. An electronic device and a method of operating the same can be provided.

In one embodiment of the present disclosure, when the quality of at least one communication link among the communication links between electronic devices providing an audio service is below the threshold quality, a flush point adjustment operation is performed on the communication link below the threshold quality. An electronic device and a method of operating the same can be provided.

An electronic device according to an embodiment may include a communication circuit and at least one processor operatively connected to the communication circuit.

According to one embodiment, the at least one processor may be configured to establish a communication link with at least one external electronic device through the communication circuit.

According to one embodiment, the at least one processor may be further configured to check the quality of the communication link.

According to one embodiment, the at least one processor may be further configured to discard at least one of the packets to be transmitted during a set time period on the communication link based on the quality of the communication link being below a threshold quality. .

According to one embodiment, the at least one processor may be further configured to transmit a packet indicating that the at least one packet is discarded to the at least one external electronic device through the communication circuit.

An electronic device according to an embodiment may include a communication circuit and at least one processor operatively connected to the communication circuit.

According to one embodiment, the at least one processor may be configured to establish a communication link with an external electronic device through the communication circuit.

According to one embodiment, the at least one processor may be further configured to receive at least one packet from the external electronic device in the communication link through the communication circuit during a set time period.

According to one embodiment, the at least one processor may be further configured to check whether the at least one received packet includes a packet indicating that the packet is discarded.

According to one embodiment, the at least one processor is configured to provide a packet corresponding to the packet indicating that the packet is discarded, based on the fact that the received at least one packet includes a packet indicating that the packet is discarded. It may be further configured to perform a recovery operation.

A method of operating an electronic device according to an embodiment may include establishing a communication link with at least one external electronic device.

According to one embodiment, the operating method may further include checking the quality of the communication link.

According to one embodiment, the operating method may further include discarding at least one of packets to be transmitted during a set time period in the communication link, based on the quality of the communication link being less than a threshold quality. .

According to one embodiment, the operating method may further include transmitting a packet indicating that the at least one packet is discarded to the at least one external electronic device.

A method of operating an electronic device according to an embodiment may include establishing a communication link with an external electronic device.

According to one embodiment, the operating method may further include receiving at least one packet from the external electronic device through the communication link during a set time period.

According to one embodiment, the operating method may further include checking whether the at least one received packet includes a packet indicating that the packet is discarded.

According to one embodiment, the operating method includes a recovery operation for a packet corresponding to a packet indicating that the packet is discarded, based on the fact that the received at least one packet includes a packet indicating that the packet is discarded. It may further include an operation to perform.

According to one embodiment, a non-transitory computer-readable storage medium includes instructions executed by at least one processor of an electronic device and configured to cause the electronic device to establish a communication link with at least one external electronic device. It may contain one or more programs that include .

According to one embodiment, the instructions may be further configured to cause the electronic device to check the quality of the communication link.

According to one embodiment, the instructions may be further configured to cause the electronic device to discard at least one of the packets to be transmitted during a set time period on the communication link based on the quality of the communication link being below a threshold quality. there is.

According to one embodiment, the instructions may further configure the electronic device to transmit a packet indicating that the at least one packet is discarded to the at least one external electronic device.

According to one embodiment, a non-transitory computer-readable storage medium includes one or more instructions executed by at least one processor of an electronic device and configured to cause the electronic device to establish a communication link with an external electronic device. It may include the above programs.

According to one embodiment, the instructions may be further configured to cause the electronic device to receive at least one packet from the external electronic device in the communication link during a set time period.

According to one embodiment, the instructions may be further configured so that the electronic device checks whether the at least one received packet includes a packet indicating that the packet is discarded.

According to one embodiment, the instructions are, based on the fact that the received at least one packet includes a packet indicating that the packet is discarded, the electronic device sends a packet corresponding to the packet indicating that the packet is discarded. It may be further configured to perform a recovery operation.

1 is a block diagram schematically showing an electronic device in a network environment according to an embodiment.
FIG. 2 is a diagram schematically illustrating an example of connections between electronic devices based on the Bluetooth method in a wireless communication network according to an embodiment.
3 is a block diagram of an external electronic device in a wireless communication network according to an embodiment.
Figure 4 is a block diagram of a first electronic device in a wireless communication network according to an embodiment.
FIG. 5 is a diagram illustrating the configuration of CIG events and CIS events in a wireless communication network according to an embodiment.
FIG. 6 is a diagram illustrating the configuration of BIG events and BIS events in a wireless communication network according to an embodiment.
7 is a diagram illustrating an example of transmissions of audio packets in a wireless communication network according to one embodiment.
FIG. 8 is a flowchart illustrating an example of an operation process of an external electronic device in a wireless communication network according to an embodiment.
FIG. 9 is a flowchart illustrating an example of an operation process of a first electronic device in a wireless communication network according to an embodiment.
10 is a diagram illustrating another example of transmissions of audio packets in a wireless communication network according to one embodiment.
11 is a diagram illustrating another example of transmissions of audio packets in a wireless communication network according to one embodiment.
12 is a diagram illustrating another example of transmissions of audio packets in a wireless communication network according to one embodiment.
FIG. 13 is a flowchart illustrating another example of an operation process of an external electronic device in a wireless communication network according to an embodiment.
14 is a diagram illustrating another example of transmissions of audio packets in a wireless communication network according to one embodiment.
FIG. 15A is a diagram illustrating an example of an operation for checking the quality of a communication link in a wireless communication network according to an embodiment.
FIG. 15B is a diagram illustrating another example of an operation for checking the quality of a communication link in a wireless communication network according to an embodiment.
FIG. 16 is a flowchart illustrating another example of an operation process of an external electronic device in a wireless communication network according to an embodiment.
FIG. 17 is a diagram illustrating a graph indicating the quality of a communication link in a wireless communication network according to an embodiment.

Hereinafter, an embodiment of the present disclosure will be described in detail with reference to the attached drawings. Also, in describing an embodiment of the present disclosure, if it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the gist of an embodiment of the present disclosure, the detailed description will be omitted. In addition, the terms described below are terms defined in consideration of functions in an embodiment of the present disclosure, and may vary depending on the intention or custom of the user or operator. Therefore, the definition should be made based on the contents throughout this specification.

It should be noted that the technical terms used in this specification are merely used to describe specific embodiments and are not intended to limit one embodiment of the present disclosure. Alternatively, technical terms used in this specification, unless specifically defined in a different way in this specification, should be interpreted as meanings commonly understood by those skilled in the art to which this disclosure pertains, and may not be overly inclusive. It should not be interpreted in a literal or excessively reduced sense. Alternatively, if the technical terms used in this specification are incorrect technical terms that do not accurately express the spirit of the present disclosure, they should be replaced with technical terms that can be correctly understood by those skilled in the art. Alternatively, general terms used in an embodiment of the present disclosure should be interpreted as defined in a dictionary or according to the context, and should not be interpreted in an excessively reduced sense.

Alternatively, as used herein, singular expressions include plural expressions unless the context clearly dictates otherwise. In this application, terms such as “consists of” or “includes” should not be construed as necessarily including all of the various components or operations described in the specification, and some of the components or operations may include It may not be included, or it may be interpreted as including additional components or operations.

Alternatively, terms including ordinal numbers, such as first, second, etc., used in this specification may be used to describe various components, but the components should not be limited by the terms. The above terms are used only for the purpose of distinguishing one component from another. For example, a first component may be referred to as a second component, and similarly, the second component may also be referred to as the first component without departing from the scope of the present disclosure.

When a component is referred to as being “connected” or “connected” to another component, it may be directly connected to or connected to the other component, but other components may also exist in between. On the other hand, when it is mentioned that a component is “directly connected” or “directly connected” to another component, it should be understood that there are no other components in between.

Hereinafter, an embodiment according to the present disclosure will be described in detail with reference to the attached drawings. However, identical or similar components will be assigned the same reference numerals regardless of reference numerals, and duplicate descriptions thereof will be omitted. Alternatively, when describing an embodiment of the present disclosure, if it is determined that a detailed description of a related known technology may obscure the gist of the present disclosure, the detailed description will be omitted. Alternatively, it should be noted that the attached drawings are only intended to facilitate easy understanding of the spirit of the present disclosure, and should not be construed as limiting the spirit of the present disclosure by the attached drawings. The spirit of the present disclosure should be construed as extending to all changes, equivalents, and substitutes other than the attached drawings.

Hereinafter, an electronic device will be described in an embodiment of the present disclosure. The electronic device includes a terminal, a mobile station, mobile equipment (ME), user equipment (UE), It may be referred to as a user terminal (UT), a subscriber station (SS), a wireless device, a handheld device, or an access terminal (AT). Alternatively, in one embodiment of the present disclosure, the electronic device may be a device with a communication function, such as a mobile phone, a personal digital assistant (PDA), a smartphone, a wireless modem, or a laptop. It can be.

Alternatively, in specifically describing an embodiment of the present disclosure, reference will be made to the Bluetooth standard defined by the Bluetooth SIG (special interest group), but the main gist of the present disclosure is to It can also be applied to communication systems with slight modifications without significantly departing from the scope of the present disclosure, which may be possible at the discretion of a person skilled in the technical field of the present disclosure.

FIG. 1 is a block diagram schematically showing an electronic device 101 in a network environment 100 according to an embodiment.

Referring to FIG. 1, in the network environment 100, the electronic device 101 communicates with the electronic device 102 through a first network 198 (e.g., a short-range wireless communication network) or a second network 199. It is possible to communicate with the electronic device 104 or the server 108 through (e.g., a long-distance wireless communication network). According to one embodiment, the electronic device 101 may communicate with the electronic device 104 through the server 108. According to one embodiment, the electronic device 101 includes a processor 120, a memory 130, an input module 150, an audio output module 155, a display module 160, an audio module 170, and a sensor module ( 176), interface 177, connection terminal 178, haptic module 179, camera module 180, power management module 188, battery 189, communication module 190, subscriber identification module 196 , or may include an antenna module 197. In some embodiments, at least one of these components (eg, the connection terminal 178) may be omitted or one or more other components may be added to the electronic device 101. In some embodiments, some of these components (e.g., sensor module 176, camera module 180, or antenna module 197) are integrated into one component (e.g., display module 160). It can be.

The processor 120, for example, executes software (e.g., program 140) to operate at least one other component (e.g., hardware or software component) of the electronic device 101 connected to the processor 120. It can be controlled and various data processing or calculations can be performed. According to one embodiment, as at least part of data processing or computation, processor 120 stores commands or data received from another component (e.g., sensor module 176 or communication module 190) in volatile memory 132. The commands or data stored in the volatile memory 132 can be processed, and the resulting data can be stored in the non-volatile memory 134. According to one embodiment, the processor 120 includes the main processor 121 (e.g., a central processing unit or an application processor) or an auxiliary processor 123 that can operate independently or together (e.g., a graphics processing unit, a neural network processing unit ( It may include a neural processing unit (NPU), an image signal processor, a sensor hub processor, or a communication processor). For example, if the electronic device 101 includes a main processor 121 and a secondary processor 123, the secondary processor 123 may be set to use lower power than the main processor 121 or be specialized for a designated function. You can. The auxiliary processor 123 may be implemented separately from the main processor 121 or as part of it.

The auxiliary processor 123 may, for example, act on behalf of the main processor 121 while the main processor 121 is in an inactive (e.g., sleep) state, or while the main processor 121 is in an active (e.g., application execution) state. ), together with the main processor 121, at least one of the components of the electronic device 101 (e.g., the display module 160, the sensor module 176, or the communication module 190) At least some of the functions or states related to can be controlled. According to one embodiment, co-processor 123 (e.g., image signal processor or communication processor) may be implemented as part of another functionally related component (e.g., camera module 180 or communication module 190). there is. According to one embodiment, the auxiliary processor 123 (eg, neural network processing device) may include a hardware structure specialized for processing artificial intelligence models. Artificial intelligence models can be created through machine learning. For example, such learning may be performed in the electronic device 101 itself, where artificial intelligence is performed, or may be performed through a separate server (e.g., server 108). Learning algorithms may include, for example, supervised learning, unsupervised learning, semi-supervised learning, or reinforcement learning, but It is not limited. An artificial intelligence model may include multiple artificial neural network layers. Artificial neural networks include deep neural network (DNN), convolutional neural network (CNN), recurrent neural network (RNN), restricted boltzmann machine (RBM), belief deep network (DBN), bidirectional recurrent deep neural network (BRDNN), It may be one of deep Q-networks or a combination of two or more of the above, but is not limited to the examples described above. In addition to hardware structures, artificial intelligence models may additionally or alternatively include software structures.

The memory 130 may store various data used by at least one component (eg, the processor 120 or the sensor module 176) of the electronic device 101. Data may include, for example, input data or output data for software (e.g., program 140) and instructions related thereto. Memory 130 may include volatile memory 132 or non-volatile memory 134.

The program 140 may be stored as software in the memory 130 and may include, for example, an operating system 142, middleware 144, or application 146.

The input module 150 may receive commands or data to be used in a component of the electronic device 101 (e.g., the processor 120) from outside the electronic device 101 (e.g., a user). The input module 150 may include, for example, a microphone, mouse, keyboard, keys (eg, buttons), or digital pen (eg, stylus pen).

The sound output module 155 may output sound signals to the outside of the electronic device 101. The sound output module 155 may include, for example, a speaker or a receiver. Speakers can be used for general purposes such as multimedia playback or recording playback. The receiver can be used to receive incoming calls. According to one embodiment, the receiver may be implemented separately from the speaker or as part of it.

The display module 160 can visually provide information to the outside of the electronic device 101 (eg, a user). The display module 160 may include, for example, a display, a hologram device, or a projector, and a control circuit for controlling the device. According to one embodiment, the display module 160 may include a touch sensor configured to detect a touch, or a pressure sensor configured to measure the intensity of force generated by the touch.

The audio module 170 can convert sound into an electrical signal or, conversely, convert an electrical signal into sound. According to one embodiment, the audio module 170 acquires sound through the input module 150, the sound output module 155, or an external electronic device (e.g., directly or wirelessly connected to the electronic device 101). Sound may be output through the electronic device 102 (e.g., speaker or headphone).

The sensor module 176 detects the operating state (e.g., power or temperature) of the electronic device 101 or the external environmental state (e.g., user state) and generates an electrical signal or data value corresponding to the detected state. can do. According to one embodiment, the sensor module 176 includes, for example, a gesture sensor, a gyro sensor, an air pressure sensor, a magnetic sensor, an acceleration sensor, a grip sensor, a proximity sensor, a color sensor, an IR (infrared) sensor, a biometric sensor, It may include a temperature sensor, humidity sensor, or light sensor.

The interface 177 may support one or more designated protocols that can be used to connect the electronic device 101 directly or wirelessly with an external electronic device (eg, the electronic device 102). According to one embodiment, the interface 177 may include, for example, a high definition multimedia interface (HDMI), a universal serial bus (USB) interface, an SD card interface, or an audio interface.

The connection terminal 178 may include a connector through which the electronic device 101 can be physically connected to an external electronic device (eg, the electronic device 102). According to one embodiment, the connection terminal 178 may include, for example, an HDMI connector, a USB connector, an SD card connector, or an audio connector (eg, a headphone connector).

The haptic module 179 can convert electrical signals into mechanical stimulation (e.g., vibration or movement) or electrical stimulation that the user can perceive through tactile or kinesthetic senses. According to one embodiment, the haptic module 179 may include, for example, a motor, a piezoelectric element, or an electrical stimulation device.

The camera module 180 can capture still images and moving images. According to one embodiment, the camera module 180 may include one or more lenses, image sensors, image signal processors, or flashes.

The power management module 188 can manage power supplied to the electronic device 101. According to one embodiment, the power management module 188 may be implemented as at least a part of, for example, a power management integrated circuit (PMIC).

The battery 189 may supply power to at least one component of the electronic device 101. According to one embodiment, the battery 189 may include, for example, a non-rechargeable primary battery, a rechargeable secondary battery, or a fuel cell.

Communication module 190 is configured to provide a direct (e.g., wired) communication channel or wireless communication channel between electronic device 101 and an external electronic device (e.g., electronic device 102, electronic device 104, or server 108). It can support establishment and communication through established communication channels. Communication module 190 operates independently of processor 120 (e.g., an application processor) and may include one or more communication processors that support direct (e.g., wired) communication or wireless communication. According to one embodiment, the communication module 190 is a wireless communication module 192 (e.g., a cellular communication module, a short-range wireless communication module, or a global navigation satellite system (GNSS) communication module) or a wired communication module 194 (e.g., : LAN (local area network) communication module, or power line communication module) may be included. Among these communication modules, the corresponding communication module is a first network 198 (e.g., a short-range communication network such as Bluetooth, Wi-Fi (wireless fidelity) direct, or IrDA (infrared data association)) or a second network 199. It may communicate with an external electronic device 104 through (e.g., a legacy cellular network, a 5G network, a next-generation communication network, the Internet, or a long-distance communication network such as a computer network (e.g., LAN or WAN)). These various types of communication modules may be integrated into one component (e.g., a single chip) or may be implemented as a plurality of separate components (e.g., multiple chips). The wireless communication module 192 uses subscriber information (e.g., International Mobile Subscriber Identifier (IMSI)) stored in the subscriber identification module 196 within a communication network such as the first network 198 or the second network 199. The electronic device 101 can be confirmed or authenticated.

The wireless communication module 192 may support 5G networks after 4G networks and next-generation communication technologies, for example, NR access technology (new radio access technology). NR access technology provides high-speed transmission of high-capacity data (eMBB (enhanced mobile broadband)), minimization of terminal power and access to multiple terminals (mMTC (massive machine type communications)), or high reliability and low latency (URLLC (ultra-reliable and low latency). -latency communications)) can be supported. The wireless communication module 192 may support high frequency bands (eg, mmWave bands), for example, to achieve high data rates. The wireless communication module 192 uses various technologies to secure performance in high frequency bands, for example, beamforming, massive array multiple-input and multiple-output (MIMO), and full-dimensional multiplexing. It can support technologies such as input/output (FD-MIMO: full dimensional MIMO), array antenna, analog beam-forming, or large scale antenna. The wireless communication module 192 may support various requirements specified in the electronic device 101, an external electronic device (e.g., electronic device 104), or a network system (e.g., second network 199). According to one embodiment, the wireless communication module 192 supports Peak data rate (e.g., 20 Gbps or more) for realizing eMBB, loss coverage (e.g., 164 dB or less) for realizing mmTC, or U-plane latency (e.g., 164 dB or less) for realizing URLLC. Example: Downlink (DL) and uplink (UL) each of 0.5 ms or less, or round trip 1 ms or less) can be supported.

The antenna module 197 may transmit or receive signals or power to or from the outside (eg, an external electronic device). According to one embodiment, the antenna module 197 may include an antenna including a radiator made of a conductor or a conductive pattern formed on a substrate (eg, PCB). According to one embodiment, the antenna module 197 may include a plurality of antennas (eg, an array antenna). In this case, at least one antenna suitable for a communication method used in a communication network such as the first network 198 or the second network 199 is connected to the plurality of antennas by, for example, the communication module 190. can be selected. Signals or power may be transmitted or received between the communication module 190 and an external electronic device through the at least one selected antenna. According to some embodiments, in addition to the radiator, other components (eg, radio frequency integrated circuit (RFIC)) may be additionally formed as part of the antenna module 197.

According to one embodiment, the antenna module 197 may form a mmWave antenna module. According to one embodiment, a mmWave antenna module includes: a printed circuit board, an RFIC disposed on or adjacent to a first side (e.g., bottom side) of the printed circuit board and capable of supporting a designated high frequency band (e.g., mmWave band); and a plurality of antennas (e.g., array antennas) disposed on or adjacent to the second side (e.g., top or side) of the printed circuit board and capable of transmitting or receiving signals in the designated high frequency band. You can.

At least some of the components are connected to each other through a communication method between peripheral devices (e.g., bus, general purpose input and output (GPIO), serial peripheral interface (SPI), or mobile industry processor interface (MIPI)) and signal ( (e.g. commands or data) can be exchanged with each other.

According to one embodiment, commands or data may be transmitted or received between the electronic device 101 and the external electronic device 104 through the server 108 connected to the second network 199. Each of the external electronic devices 102 or 104 may be of the same or different type as the electronic device 101. According to one embodiment, all or part of the operations performed in the electronic device 101 may be executed in one or more of the external electronic devices 102, 104, or 108. For example, when the electronic device 101 needs to perform a certain function or service automatically or in response to a request from a user or another device, the electronic device 101 may perform the function or service instead of executing the function or service on its own. Alternatively, or additionally, one or more external electronic devices may be requested to perform at least part of the function or service. One or more external electronic devices that have received the request may execute at least part of the requested function or service, or an additional function or service related to the request, and transmit the result of the execution to the electronic device 101. The electronic device 101 may process the result as is or additionally and provide it as at least part of a response to the request. For this purpose, for example, cloud computing, distributed computing, mobile edge computing (MEC), or client-server computing technology can be used. The electronic device 101 may provide an ultra-low latency service using, for example, distributed computing or mobile edge computing. In one embodiment, the external electronic device 104 may include an Internet of Things (IoT) device. Server 108 may be an intelligent server using machine learning and/or neural networks. According to one embodiment, the external electronic device 104 or server 108 may be included in the second network 199. The electronic device 101 may be applied to intelligent services (e.g., smart home, smart city, smart car, or healthcare) based on 5G communication technology and IoT-related technology.

An electronic device according to an embodiment disclosed in this document may be of various types. Electronic devices may include, for example, portable communication devices (e.g., smartphones), computer devices, portable multimedia devices, portable medical devices, cameras, wearable devices, or home appliances. Electronic devices according to embodiments of this document are not limited to the above-mentioned devices.

An embodiment of this document and the terms used therein are not intended to limit the technical features described in this document to specific embodiments, and should be understood to include various changes, equivalents, or substitutes for the embodiment. In connection with the description of the drawings, similar reference numbers may be used for similar or related components. The singular form of a noun corresponding to an item may include one or more of the above items, unless the relevant context clearly indicates otherwise. As used herein, “A or B”, “at least one of A and B”, “at least one of A or B”, “A, B or C”, “at least one of A, B and C”, and “A Each of phrases such as “at least one of , B, or C” may include any one of the items listed together in the corresponding phrase, or any possible combination thereof. Terms such as "first", "second", or "first" or "second" may be used simply to distinguish one component from another, and to refer to that component in other respects (e.g., importance or order) is not limited. One (e.g., first) component is said to be “coupled” or “connected” to another (e.g., second) component, with or without the terms “functionally” or “communicatively.” When mentioned, it means that any of the components can be connected to the other components directly (e.g. wired), wirelessly, or through a third component.

The term “module” used in one embodiment of this document may include a unit implemented in hardware, software, or firmware, and is interchangeable with terms such as logic, logic block, component, or circuit, for example. can be used A module may be an integrated part or a minimum unit of the parts or a part thereof that performs one or two or more functions. For example, according to one embodiment, the module may be implemented in the form of an application-specific integrated circuit (ASIC).

An embodiment of the present document is one or more instructions stored in a storage medium (e.g., built-in memory 136 or external memory 138) that can be read by a machine (e.g., electronic device 101). It may be implemented as software (e.g., program 140) including these. For example, a processor (e.g., processor 120) of a device (e.g., electronic device 101) may call at least one command among one or more commands stored from a storage medium and execute it. This allows the device to be operated to perform at least one function according to the at least one instruction called. The one or more instructions may include code generated by a compiler or code that can be executed by an interpreter. A storage medium that can be read by a device may be provided in the form of a non-transitory storage medium. Here, 'non-transitory' only means that the storage medium is a tangible device and does not contain signals (e.g. electromagnetic waves), and this term refers to cases where data is semi-permanently stored in the storage medium. There is no distinction between temporary storage cases.

According to one embodiment, a method according to an embodiment disclosed in this document may be provided and included in a computer program product. Computer program products are commodities and can be traded between sellers and buyers. The computer program product may be distributed in the form of a machine-readable storage medium (e.g. compact disc read only memory (CD-ROM)) or via an application store (e.g. Play Store ^TM ) or on two user devices (e.g. It can be distributed (e.g. downloaded or uploaded) directly between smartphones) or online. In the case of online distribution, at least a portion of the computer program product may be at least temporarily stored or temporarily created in a machine-readable storage medium, such as the memory of a manufacturer's server, an application store's server, or a relay server.

According to one embodiment, each component (e.g., module or program) of the above-described components may include a single or multiple entities, and some of the multiple entities may be separately placed in other components. . According to one embodiment, one or more of the above-described corresponding components or operations may be omitted, or one or more other components or operations may be added. Alternatively or additionally, multiple components (eg, modules or programs) may be integrated into a single component. In this case, the integrated component may perform one or more functions of each component of the plurality of components in the same or similar manner as those performed by the corresponding component of the plurality of components prior to the integration. . According to one embodiment, operations performed by a module, program, or other component may be executed sequentially, in parallel, iteratively, or heuristically, or one or more of the operations may be executed in a different order, omitted, or , or one or more other operations may be added.

FIG. 2 is a diagram schematically illustrating an example of connections between electronic devices based on the Bluetooth method in a wireless communication network according to an embodiment.

Referring to FIG. 2, an external electronic device 201 (e.g., electronic device 101 in FIG. 1) is connected to an ear-wearable device 102 (e.g., electronic device 102 in FIG. 1). Can be connected wirelessly. In one embodiment, the external electronic device 201 may be a smartphone. The ear wearable device 102 may include a first electronic device 202 (e.g., a left ear bud) and a second electronic device 204 (e.g., a right ear bud). there is. In one embodiment, the first electronic device 202, the second electronic device 204, and the external electronic device 201 connected based on the Bluetooth method provide an audio service such as music play. When provided, each of the first electronic device 202 and the second electronic device 204 can operate as an audio sink device, and the external electronic device 201 can operate as an audio source device. It can work. For example, the first electronic device 202 serves as a first audio channel (e.g., left audio channel), and the second electronic device 204 serves as a second audio channel (e.g., right audio channel). audio channel).

In one embodiment, it is assumed that the first electronic device 202 and the second electronic device 204 are included in the wearable device 102, but the first electronic device 202 and the second electronic device 204 It may be included in any electronic device as long as the first electronic device 202 and the second electronic device 204 can operate as a pair, as well as the wearable device 102. According to one embodiment, the first electronic device 202 and the second electronic device 204 may be implemented to include the same or similar configurations.

According to one embodiment, the external electronic device 201, the first electronic device 202, and the second electronic device 204 establish a connection (e.g., a communication link) and exchange data (e.g., audio data) with each other. Can transmit and/or receive. For example, the electronic device 101, the first electronic device 202, and the second electronic device 204 may each establish a communication link based on at least one of a Wi-Fi method or a Bluetooth method, However, the method by which the electronic device 101, the first electronic device 202, and the second electronic device 204 each establish a communication link is not limited to at least one of the Wi-Fi method or the Bluetooth method. For example, when the external electronic device 201, the first electronic device 202, and the second electronic device 204 each establish a communication link using the Bluetooth method, the communication link is a connected isochronous stream. : CIS) connection.

In one embodiment, the external electronic device 201 establishes a communication link with only one of the first electronic device 202 and the second electronic device 204, or the external electronic device 202 and the second electronic device 204. A communication link can be established with each of the devices 204. For example, the communication link established between the external electronic device 201 and the first electronic device 202 may be a first communication link, and the communication link established between the external electronic device 201 and the second electronic device 204 The link may be a second communication link.

In one embodiment, the first electronic device 202 and the second electronic device 204 may establish a communication link based on at least one of Wi-Fi or Bluetooth, but the first electronic device 202 And the method by which the second electronic device 204 establishes the communication link is not limited to at least one of the Wi-Fi method or the Bluetooth method. For example, if the method of establishing the communication link between the first electronic device 202 and the second electronic device 204 is Bluetooth, the communication link may be a CIS connection. For example, the first electronic device ( The communication link established between 202) and the second electronic device 204 may be a second communication link.

In one embodiment, one of the first electronic device 202 and the second electronic device 204 is a central device (or master device, primary device, or main device). device), and the other one can operate as a peripheral device (or a slave device, a secondary device, or a sub device). An electronic device operating as a central device can transmit data to an electronic device operating as a peripheral device. For example, when the first electronic device 202 and the second electronic device 204 establish a communication link with each other, one of the first electronic device 202 and the second electronic device 204 is selected as the central device. and the other can be selected as the peripheral device.

The first electronic device 202 and the second electronic device 204 may communicate directly or indirectly with the third electronic device 300. In one embodiment, the third electronic device 300 is an ear buds case device or cradle device that stores and charges the first electronic device 202 and the second electronic device 204. It may be, and in FIG. 2, for convenience of explanation, it is assumed that the third electronic device 300 is an ear buzz case device.

3 is a block diagram of an external electronic device in a wireless communication network according to an embodiment.

Referring to FIG. 3, the external electronic device 201 (e.g., the electronic device 101 of FIG. 1 or the external electronic device 201 of FIG. 2) uses a Bluetooth type (e.g., a Bluetooth low energy (BLE) type). ) may be a device that implements. The external electronic device 201 receives signals using another electronic device (e.g., the electronic device 102 or 104 in FIG. 1), for example, a peer device, and one or two antennas 301. It may include a communication circuit 302 (eg, communication module 190) that transmits and receives. In one embodiment, the other electronic device may include at least one of the first electronic device 202 and the second electronic device 204.

The external electronic device 201 includes a processor 304 (e.g., processor 120 of FIG. 1), which may be implemented with one or two or more single core processors or one or two or more multi-core processors, and an external electronic device. It may include a memory 306 (eg, memory 130 in FIG. 1) that stores instructions for operating the device 201.

The external electronic device 201 may include an interface module 308 (e.g., interface 177 in FIG. 1) that provides a wired and/or wireless interface for communicating with components external to the network. . For example, at least some of the one or more antennas 301, the communication circuit 302, or the interface module 308 may be implemented as at least part of the communication module 190 and the antenna module 198 of FIG. 1. You can.

According to one embodiment, the external electronic device 201 may include a plurality of communication circuits, one of the plurality of communication circuits may be a communication circuit based on the Wi-Fi method, and one of the plurality of communication circuits may be a communication circuit based on the Wi-Fi method. The other may be a communication circuit based on Bluetooth, for example, BLE. According to one embodiment, a plurality of communication circuits may include a communication circuit 302, and the communication circuit 302 may be a communication circuit based on the Wi-Fi method or a communication circuit based on the BLE method. You can.

According to one embodiment, the external electronic device 201 does not separately include a communication circuit based on the Wi-Fi method and a communication circuit based on the BLE method, but is a single device capable of supporting both the Wi-Fi method and the BLE method. It may also include communication circuitry. According to one embodiment, one communication circuit that can support both the Wi-Fi method and the BLE method may be the communication circuit 302.

Figure 4 is a block diagram of a first electronic device in a wireless communication network according to an embodiment.

Referring to FIG. 4, an external electronic device 201 (e.g., the electronic device 101 of FIG. 1 or the external electronic device 201 of FIG. 2 or 3) is connected to a wearable device (e.g., the electronic device of FIG. 1 (e.g., 102)) can be connected wirelessly. In one embodiment, the external electronic device 201 may be a smart phone, and the wearable device may be a first electronic device 202 (e.g., a left earbud) or a second electronic device 204 (e.g., a right earbud). It may include at least one of:

In Figure 4, the first electronic device 202 and the second electronic device 204 are each implemented as earbuds, but the first electronic device 202 and the second electronic device 204 are explained below. It may be implemented as various types of devices (e.g., smart watches, head-mounted display devices, devices for measuring biological signals (e.g., electrocardiogram patch)) that may include at least one electrode and sensor device. . According to one embodiment, when the first electronic device 202 and the second electronic device 204 are each implemented as earbuds, the first electronic device 202 and the second electronic device 204 are a pair. can be configured. According to one embodiment, the first electronic device 202 and the second electronic device 204 may be implemented to include the same or similar configurations.

According to one embodiment, the external electronic device 201, the first electronic device 202, and the second electronic device 204 establish a connection (e.g., a communication link) and transmit and/or receive data to each other. You can. For example, the external electronic device 201, the first electronic device 202, and the second electronic device 204 may each establish a communication link using at least one of the Wi-Fi method or the Bluetooth method. The method by which the external electronic device 201, the first electronic device 202, and the second electronic device 204 each establish a communication link is not limited to at least one of the Wi-Fi method or the Bluetooth method.

In one embodiment, the external electronic device 201 establishes a communication link only with either the first electronic device 202 or the second electronic device 204 (e.g., a central earbud), or with the first electronic device 204 (e.g., a central earbud). Communication links may be connected to both 202) and the second electronic device 204.

In one embodiment, the first electronic device 202 and the second electronic device 204 may establish a communication link based on at least one of Wi-Fi or Bluetooth, but the first electronic device 202 And the method by which the second electronic device 204 establishes the communication link is not limited to at least one of the Wi-Fi method or the Bluetooth method.

In one embodiment, the first electronic device 202 is a component identical to or similar to at least one of the components (e.g., modules) of the external electronic device 201 (e.g., the electronic device 101 of FIG. 1). may include. The first electronic device 202 includes a communication circuit 420 (e.g., communication module 190 in FIG. 1), an input device 430 (e.g., input module 150 in FIG. 1), and a sensor 440 (e.g. : sensor module 176 in FIG. 1), audio processing module 450 (e.g., audio module 170 in FIG. 1), memory 490 (e.g., memory 130 in FIG. 1), power management module ( 460) (e.g., power management module 188 of FIG. 1), battery 470 (e.g., battery 189 of FIG. 1), interface 480 (e.g., interface 177 of FIG. 1), and processor. 410 (e.g., processor 120 of FIG. 1).

According to one embodiment, the communication circuit 420 is a wireless communication module (e.g., a Bluetooth communication module, a cellular communication module, a wireless-fidelity (Wi-Fi) communication module, a near field communication (NFC) communication module, or a global communication module (GNSS). It may include at least one of a navigation satellite system communication module) or a wired communication module (e.g., a LAN (local area network) communication module, or a power line communication (PLC) communication module).

The communication circuit 420 uses at least one communication module included in the external electronic device 201 and the third electronic device 300 through a first network (e.g., the first network 198 in FIG. 1). , or may communicate directly or indirectly with at least one of the second electronic devices 204. The second electronic device 204 may be configured as a pair with the first electronic device 202. Communications circuitry 420 may operate independently of processor 410 and may include one or more communications processors supporting wired or wireless communications.

According to one embodiment, the communication circuit 420 transmits a signal or information to another electronic device (e.g., the external electronic device 201, the second electronic device 204, or the third electronic device 300), It can be connected to one or multiple antennas that can receive information from other electronic devices. According to one embodiment, a communication method suitable for a communication network such as a first network (e.g., the first network 198 in FIG. 1) or a second network (e.g., the second network 199 in FIG. 2) At least one antenna may be selected from multiple antennas by communication circuitry 420. Signals or information may be transmitted or received between communication circuit 420 and another electronic device via at least one selected antenna.

According to one embodiment, the input device 430 may be configured to generate various input signals that can be used in the operation of the first electronic device 202. The input device 430 may include at least one of a touch pad, a touch panel, or a button.

According to one embodiment, the input device 430 may generate a user input related to turning on or off the first electronic device 202. According to one embodiment, the input device 430 may receive a user input for establishing a communication link between the first electronic device 202 and the second electronic device 204. According to one embodiment, the input device 430 may receive user input related to audio data (or audio content). For example, user input may relate to the ability to start playback, pause playback, stop playback, adjust playback speed, adjust playback volume, or mute audio data.

According to one embodiment, the sensor 440 may obtain the location or operating state of the first electronic device 202. The sensor 440 may convert the acquired signal into an electrical signal. For example, the sensor 440 may include at least one of a magnetic sensor, an acceleration sensor, a gyro sensor, a geomagnetic sensor, a proximity sensor, a gesture sensor, a grip sensor, a biometric sensor, and/or an optical sensor.

According to one embodiment, the processor 410 obtains data (e.g., audio data) from a packet (e.g., audio packet) received from the external electronic device 201, and processes the acquired data into the audio processing module 450. It can be processed through and the processed data can be output through the speaker 454. The audio processing module 450 may support an audio data collection function and play the collected audio data.

According to one embodiment, the audio processing module 450 may include an audio decoder (not shown) and a D/A converter (not shown). The audio decoder can convert audio data stored in the memory 490 or received from the external electronic device 201 through the communication circuit 420 into a digital audio signal. The D/A converter can convert the digital audio signal converted by the audio decoder into an analog audio signal. According to one embodiment, the audio decoder may convert audio data received from the external electronic device 201 through the communication circuit 420 and stored in the memory 490 into a digital audio signal. The speaker 454 can output an analog audio signal converted by a D/A converter.

According to one embodiment, the audio processing module 450 may include an A/D converter (not shown). The A/D converter can convert the analog voice signal transmitted through the microphone 452 into a digital voice signal. Microphone 452 may include at least one air conduction microphone and/or at least one bone conduction microphone for acquiring speech and/or sound.

According to one embodiment, the audio processing module 450 may reproduce various audio data set during the operation of the first electronic device 202. For example, the processor 410 may confirm through the sensor 440 that the first electronic device 202 is coupled to or separated from the user's ear, and may detect a sound effect or a guidance sound through the audio processing module 450. It can be designed to play audio data about. The output of sound effects or guidance sounds may be omitted depending on user settings or designer intent.

According to one embodiment, the memory 490 may store various data used by at least one component (eg, the processor 410 or the sensor 440) of the first electronic device 402. For example, data may include input data or output data for software and related instructions. Memory 490 may include volatile memory or non-volatile memory.

According to one embodiment, the power management module 460 may manage power supplied to the first electronic device 402. According to one embodiment, the power management module 460 may be implemented as at least a part of a power management integrated circuit (PMIC). According to one embodiment, the power management module 460 may include a battery charging module. According to one embodiment, another electronic device (e.g., one of the external electronic device 201, the second electronic device 204, and/or the third electronic device 300) is electrically connected to the first electronic device 202. When connected (wireless or wired), the power management module 460 can charge the battery 470 by receiving power from another electronic device.

According to one embodiment, the battery 470 may supply power to at least one component of the first electronic device 202. According to one embodiment, the battery 470 may include a rechargeable cell. According to one embodiment, when the first electronic device 202 is mounted in the third electronic device 300, the first electronic device 202 charges the battery 470 to a specified charge level and then The power of 202 may be turned on or at least a portion of the communication circuit 420 may be turned on.

According to one embodiment, the interface 480 allows the first electronic device 402 to communicate directly with the external electronic device 201, the third electronic device 300, the second electronic device 204, or another electronic device (e.g. : Can support one or more specified protocols that can be used to connect (via wire). According to one embodiment, the interface 480 may include at least one of a high definition multimedia interface (HDMI), a USB interface, an SD card interface, a power line communication (PLC) interface, or an audio interface. According to one embodiment, the interface 480 may include at least one connection port for forming a physical connection with the third electronic device 300.

According to one embodiment, the processor 410 may execute software to control at least one other component (e.g., hardware or software component) of the first electronic device 202 connected to the processor 410, A variety of data processing or calculations can be performed. According to one embodiment, as at least part of data processing or computation, the processor 410 stores instructions or data received from another component (e.g., sensor 440 or communication circuit 420) in volatile memory 490. It is possible to load, process instructions or data stored in the volatile memory 490, and store the resulting data in the non-volatile memory.

According to one embodiment, the processor 410 may establish a communication link with the external electronic device 201 through the communication circuit 420, and receive data (e.g., audio data) from the external electronic device 201 through the established communication link. ) can be received. According to one embodiment, the processor 410 may transmit data received from the external electronic device 201 to the second electronic device 204 through the communication circuit 420. According to one embodiment, the processor 410 may perform operations of the first electronic device 202, which will be described below.

According to one embodiment, the first electronic device 202 may further include various modules depending on the form of provision. Although there are so many variations according to the convergence trend of digital devices that it is impossible to list them all, components equivalent to those described above may be additionally included in the first electronic device 202. You can. In addition, the first electronic device 202 according to an embodiment may exclude certain components from among the components described in FIG. 4 or replace them with other components depending on the form of provision.

According to one embodiment, the second electronic device 204 configured as a pair with the first electronic device 202 includes components similar to or substantially the same as components included in the first electronic device 202. and can perform all or part of the operations of the second electronic device 204 described below.

According to one embodiment, an electronic device (e.g., the electronic device 101 of FIG. 1, or the external electronic device 201 of FIG. 2, 3, or 4) uses a communication circuit (e.g., the communication module of FIG. 1). 190) or communication circuit 302 of FIG. 3), and at least one processor (e.g., communication module 190 of FIG. 1 or communication circuit 302 of FIG. 3) operatively connected to the communication circuit (e.g., communication module 190 of FIG. 1 or communication circuit 302 of FIG. 3). It may include the processor 120 of FIG. 1 or the processor 304 of FIG. 3.

According to one embodiment, the at least one processor (e.g., the processor 120 of FIG. 1 or the processor 304 of FIG. 3) is connected to the communication circuit (e.g., the communication module 190 of FIG. 1 or the processor 304 of FIG. 3). A communication link with at least one external electronic device (e.g., the first electronic device 202 of FIG. 2 or FIG. 4, or the second electronic device 204 of FIG. 2 or FIG. 4) via a communication circuit 302). It can be configured to set .

According to one embodiment, the at least one processor (eg, processor 120 in FIG. 1 or processor 304 in FIG. 3) may be further configured to check the quality of the communication link.

According to one embodiment, the at least one processor (e.g., processor 120 of FIG. 1 or processor 304 of FIG. 3) is configured to: It may be further configured to discard at least one of the packets to be transmitted during the set time period.

According to one embodiment, the at least one processor (e.g., the processor 120 of FIG. 1 or the processor 304 of FIG. 3) is connected to the communication circuit (e.g., the communication module 190 of FIG. 1 or the processor 304 of FIG. 3). Through the communication circuit 302, a packet indicating that the at least one packet is discarded is sent to the at least one external electronic device (e.g., the first electronic device 202 of FIG. 2 or 4, or the first electronic device 202 of FIG. 2 or FIG. It may be further configured to transmit to the second electronic device 204 of 4).

According to one embodiment, the at least one processor (e.g., processor 120 of FIG. 1 or processor 304 of FIG. 3) performs the set time period based on the quality of the communication link being less than a threshold quality. It may be further configured to adjust flush points, which are points of time at which packets to be transmitted are discarded.

According to one embodiment, the at least one processor (e.g., the processor 120 in FIG. 1 or the processor 304 in FIG. 3) processes the at least one packet in a time domain. It may be configured to discard at a point preceding a flush point, which is the point at which it is set to be discarded.

According to one embodiment, the at least one processor (e.g., the processor 120 of FIG. 1 or the processor 304 of FIG. 3) is connected to the communication circuit (e.g., the communication module 190 of FIG. 1 or the processor 304 of FIG. 3). Through the communication circuit 302, the at least one external electronic device (e.g., the first electronic device 202 of FIG. 2 or FIG. 4) during another set time period preceding the set time period in the time domain. ), or the second electronic device 204 of FIG. 2 or 4).

According to one embodiment, the at least one processor (e.g., the processor 120 of FIG. 1 or the processor 304 of FIG. 3) is connected to the communication circuit (e.g., the communication module 190 of FIG. 1 or the processor 304 of FIG. 3). Through the communication circuit 302), the at least one external electronic device (e.g., the first electronic device 202 of FIG. 2 or FIG. 4, or the second electronic device of FIG. 2 or FIG. 4) during the different set time period. It may be configured to receive at least one response packet for packets transmitted during the different set time period from (204)).

According to one embodiment, the at least one processor (e.g., processor 120 in FIG. 1 or processor 304 in FIG. 3) is configured to check the quality of the communication link based on the at least one response packet. It can be.

According to one embodiment, the at least one processor (e.g., processor 120 of FIG. 1 or processor 304 of FIG. 3) is configured to process each connected isochronous stream (CIS) included in the set time interval. ) It can be configured to adjust flush points for packets to be transmitted during the set time interval based on the maximum number of sub-events included in the event and the number of new data packets that can be transmitted within the time interval in which the CIS event occurs. .

According to one embodiment, each CIS event is transmitted between the electronic device (e.g., the electronic device 101 of FIG. 1, or the external electronic device 201 of FIG. 2, FIG. 3, or FIG. 4) and the at least one external An electronic device (eg, the first electronic device 202 in FIG. 2 or FIG. 4, or the second electronic device 204 in FIG. 2 or FIG. 4) may include an opportunity to exchange packets.

According to one embodiment, each of the sub-events occurs when the electronic device (e.g., the electronic device 101 of FIG. 1 or the external electronic device 201 of FIG. 2, FIG. 3, or FIG. 4) transmits a packet. And, the at least one external electronic device (e.g., the first electronic device 202 of FIG. 2 or FIG. 4, or the second electronic device 204 of FIG. 2 or FIG. 4) is connected to the electronic device (e.g., FIG. 1). It can be used to respond to the electronic device 101 of, or the external electronic device 201 of Figures 2, 3, or 4).

According to one embodiment, the at least one processor (e.g., the processor 120 of FIG. 1 or the processor 304 of FIG. 3) selects at least one of packets to be transmitted during the set time period based on a set discard ratio. can be discarded.

According to one embodiment, the at least one processor (e.g., the processor 120 of FIG. 1 or the processor 304 of FIG. 3) determines the set discard rate as a set number of packets to be transmitted during the set time period. It may include a ratio between the number of acknowledgment (ACK) packets consecutively received for packets and packets indicating that the at least one packet is discarded.

According to one embodiment, the at least one processor (e.g., the processor 120 of FIG. 1 or the processor 304 of FIG. 3) is connected to the communication circuit (e.g., the communication module 190 of FIG. 1 or the processor 304 of FIG. 3). Through the communication circuit 302), the at least one external electronic device (e.g., the first electronic device 202 of FIG. 2 or FIG. 4, or the second electronic device 204 of FIG. 2 or FIG. 4) Can be further configured to transmit a packet containing information associated with the adjusted flush points.

According to one embodiment, the packet indicating that the at least one packet is discarded may be an empty packet, a null packet, or a special packet.

According to one embodiment, an electronic device (e.g., the first electronic device 202 of FIG. 2 or FIG. 4, or the second electronic device 204 of FIG. 2 or FIG. 4) uses a communication circuit (e.g., the communication circuit of FIG. 4). circuit 420), and at least one processor (e.g., processor 410 of FIG. 4) operatively connected to the communication circuit (e.g., communication circuit 420 of FIG. 4).

According to one embodiment, the at least one processor (e.g., the processor 410 in FIG. 4) communicates with an external electronic device (e.g., the communication circuit 420 in FIG. 1) through the communication circuit (e.g., the communication circuit 420 in FIG. 4). It may be configured to establish a communication link with the electronic device 101 of, or the external electronic device 201 of Figures 2, 3, or 4).

According to one embodiment, the at least one processor (e.g., processor 410 of FIG. 4) communicates with the external electronic device in the communication link through the communication circuit (e.g., communication circuit 420 of FIG. 4). It may be further configured to receive at least one packet during a set time period from (e.g., the electronic device 101 of FIG. 1 or the external electronic device 201 of FIG. 2, FIG. 3, or FIG. 4).

According to one embodiment, the at least one processor (e.g., processor 410 in FIG. 4) may be further configured to check whether the at least one received packet includes a packet indicating that the packet is discarded. You can.

According to one embodiment, the at least one processor (e.g., the processor 410 of FIG. 4), based on the fact that the received at least one packet includes a packet indicating that the packet is discarded, the packet is discarded. The device may be further configured to perform a recovery operation on a packet corresponding to a packet indicating discarding.

According to one embodiment, the at least one packet may be discarded in the time domain at a point in time preceding a flush point, which is a point in time at which the at least one packet is set to be discarded.

According to one embodiment, the at least one packet may be included in packets transmitted during the set time period, and the at least one packet may be discarded during the set time period based on a set discard rate.

According to one embodiment, the set discard rate is set at the set time by the external electronic device (e.g., the electronic device 101 of FIG. 1, or the external electronic device 201 of FIG. 2, FIG. 3, or FIG. 4). It may include a ratio between the number of acknowledgment (ACK) packets consecutively received for a set number of packets among packets transmitted during the interval and packets indicating that the packets are discarded.

According to one embodiment, a packet transmitted during the set time period by the external electronic device (e.g., the electronic device 101 of FIG. 1, or the external electronic device 201 of FIG. 2, FIG. 3, or FIG. 4) The flush points for these can be adjusted.

According to one embodiment, the flush points may be time points at which packets transmitted during the set period are set to be discarded, and the flush points are included in the set time period, each connected isochronous stream (CIS) It can be adjusted based on the maximum number of sub-events included in the event and the number of new data packets that can be transmitted within the time interval in which the CIS event occurs.

According to one embodiment, each CIS event is transmitted between the electronic device (e.g., the first electronic device 202 in FIG. 2 or FIG. 4, or the second electronic device 204 in FIG. 2 or FIG. 4) and the external electronic device. A device (e.g., the electronic device 101 of FIG. 1 or the external electronic device 201 of FIG. 2, FIG. 3, or FIG. 4) may include an opportunity to exchange packets.

According to one embodiment, each of the sub-events occurs when the external electronic device (e.g., the electronic device 101 of FIG. 1, or the external electronic device 201 of FIG. 2, FIG. 3, or FIG. 4) transmits a packet. And, the electronic device (e.g., the first electronic device 202 of FIG. 2 or FIG. 4, or the second electronic device 204 of FIG. 2 or FIG. 4) is connected to the external electronic device (e.g., the electronic device of FIG. 1). It can be used to respond to (101), or the external electronic device 201 of Figure 2, Figure 3, or Figure 4).

The Bluetooth method may include a Bluetooth legacy (or Bluetooth classic) method or a Bluetooth low energy (BLE) method. Electronic devices (e.g., the first electronic device 202 and the second electronic device 204 in FIG. 2 or 4) that use the BLE-based low energy audio (LE Audio) service are each connected to an external electronic device. Establish a connection (e.g., a communication link) independently with the electronic device 101 of FIG. 1 or the external electronic device 201 of FIG. 2, FIG. 3, or FIG. 4, and connect to the external electronic device through the established connection. You can send and receive data. For example, if the external electronic device and the electronic devices (eg, the first electronic device and/or the second electronic device) each establish a communication link using the Bluetooth method, the communication link may be a CIS connection. For example, the communication link established between the external electronic device and the first electronic device may be a first communication link, the communication link established between the external electronic device and the second electronic device may be a second communication link, and the first electronic device may be a second communication link. The communication link established between the electronic device and the second electronic device may be a third communication link. Each of the first electronic device and the second electronic device may operate as an audio sink device, and the external electronic device may operate as an audio source device. For example, the first electronic device serves as a first audio channel (e.g., left audio channel), and the second electronic device serves as a second audio channel (e.g., right audio channel). can do.

When an audio service is provided, each of the first electronic device and the second electronic device may transmit audio data input through the microphone of each of the first electronic device and the second electronic device to an external electronic device. Each of the first electronic device and the second electronic device can transmit and receive audio data with an external electronic device through a communication link established based on the BLE method.

The LE Audio service provided by BLE is a next-generation Bluetooth audio service. In the Bluetooth legacy method, the Bluetooth basic rate/enhanced data rate (BR/EDR) method is used, and an advanced audio distribution profile (A2DP) or hands-free profile (hands-free profile) is used. HFP) is used, while the LE Audio service uses a multi-stream audio method and a broadcast audio method for audio sharing.

In multi-stream audio, independent audio streams can be transmitted to one or more electronic devices. Connected isochronous group (CIG) or CIS has been introduced to support multi-stream audio.

A CIG may be created by a central device and may contain two or more CISs. For example, a CIG may include two or more CISs with the same time interval (eg, ISO_Interval).

CIS is a logical transport that allows connected devices to transmit isochronous data in either direction. CIS is based on a point-to-point method and is based on acknowledgment (ACK)-based two-way communication.

Isochronous connections can be used to transfer isochronous data between central and peripheral devices using a logical transport called CIS. CIS may include CIS events that occur at regular intervals (e.g., a specified ISO_Interval). A CIS event may be an opportunity for the central device and peripheral device to exchange audio packets.

Each CIS event may include one or more subevents. Each sub-event can be used by a central device to send an audio packet and a peripheral device to respond to the master device. In each sub-event, the central device transmits once and the peripheral device can respond. When the central device and peripheral device have completed delivering the scheduled isochronous data in the CIS event, all remaining sub-events included in the CIS event will have no further wireless transmissions, and the CIS event can therefore be closed ( closed).

Each sub-event can use a physical channel determined using a channel selection algorithm. The physical channel used for the sub-event may be marked as ISO Ch(eventcount, subeventcount). eventcount may represent the count value of the corresponding CIS event, and subeventcount may represent the count value of the sub-event in the corresponding CIS event.

CIG events may include CIS events of CISs included in the CIG. Each CIG event starts at the earliest (in terms of transmission order) anchor point of the CIS and ends at the end of the last sub-event of the latest (in terms of transmission order) CIS of the same CIS event. Two CIG events on the same CIS may not overlap. For example, the last CIS event of a given CIG event may end before the first CIS anchor point of the next CIG event.

FIG. 5 is a diagram illustrating the configuration of CIG events and CIS events in a wireless communication network according to an embodiment.

Referring to FIG. 5, one CIG event (eg, CIG event n (500)) may include two CIS events (eg, CIS1 event n (501) and CIS2 event n (503)). For example, CIS1 event n (501) may be a CIS event corresponding to CIS1, and CIS2 event n (503) may be a CIS event corresponding to CIS2.

CIS included in CIG can be arranged sequentially or interleaved by appropriately adjusting the values of Sub_Interval and the spacing between CIS anchor points. In FIG. 5, CIG event n (500) A case in which CIS1 event n (501) and CIS2 event n (503) included in are arranged sequentially is shown. For example, CIG event n (500) shown in FIG. 5 may be a CIG event including CIS1 event n (501) and CIS2 event n (503) in a sequential arrangement.

When CIS1 event n (501) and CIS2 event n (503) are arranged sequentially, CIS events of other CISs do not overlap, and therefore, sub-events of the CIS event may also not overlap. For example, if CIS1 event n (501) and CIS2 event n (503) are arranged sequentially, CIS1 event n (501) and CIS2 event n (503) do not overlap, and therefore CIS1 event n (501) Subevents included in (e.g., subevent 1 (511), subevent 2 (512), subevent 3 (513), subevent 4 (514)) and subevents included in CIS2 event n (503) (e.g., subevent 1 (541), subevent 2 (542), subevent 3 (543), and subevent 4 (544)) may not overlap.

In Figure 5, when CIS1 event n (501) and CIS2 event n (503) are arranged sequentially, CIS events of other CISs do not overlap, and therefore, sub-events of CIS events may also not overlap. It is explained as an example.

Alternatively, sub-events of multiple CIS events may overlap. For example, at least one of the sub-events included in CIS1 event n (501) and at least one of the sub-events included in CIS2 event n (503) may overlap. For example, there are six subevents (subevent 1 (511), subevent 2 (512), subevent 3 (513), subevent 4 (514), subevent 1 (541), and subevent 2 (542). Let us assume a case where two of the six sub-events overlap. For example, CIS1 event n (501) includes subevent 1 (511), subevent 2 (512), subevent 3 (513), and subevent 4 (514), and CIS2 event n (503) includes subevent 3 (513). , it is assumed that subevent 4 (514), subevent 1 (541), and subevent 2 (542) are included. In this case, if subevent 1 (511) and subevent 2 (512) are used in CIS1 event n (501), subevent 3 (513), subevent 4 (514), subevent 1 (541), and Subevent 2 (542) can be used, and in contrast, when subevent 1 (511), subevent 2 (512), subevent 3 (513), and subevent 4 (514) are used in CIS1 event n (501), CIS2 event n In (503), subevent 1 (541) and subevent 2 (542) can be used.

For each adjacent pair of CISs, the interval between CIS anchor points of the CISs may be at least NSE (number of subevent) Х Sub_Interval. NSE represents the number of sub-events and may represent the maximum number of sub-events included in each CIS event. In FIG. 5, “C” may represent a central device, “P1” may represent a first peripheral device, and “P2” may represent a second peripheral device.

In subevent 1 (511), the central device transmits a connection isochronous protocol data unit (PDU) 521, and in subevent 2 (512), the central device transmits a connection isochronous PDU (522), and in subevent 3 ( In 513), the central device may transmit a connected isochronous PDU (523), and in subevent 4 (514), the central device may transmit a connected isochronous PDU (524). Each of the connected isochronous PDU 521, connected isochronous PDU 522, connected isochronous PDU 523, and connected isochronous PDU 524 may be a connected isochronous PDU transmitted from the central device to the peripheral device.

In subevent 1 (511), the first peripheral device transmits a connected isochronous PDU (531), in subevent 2 (512), the first peripheral device transmits a connected isochronous PDU (532), and in subevent 3 (513) The first peripheral device may transmit a connected isochronous PDU (533), and in subevent 4 (514), the first peripheral device may transmit a connected isochronous PDU (534). Each of the connected isochronous PDU 531, connected isochronous PDU 532, connected isochronous PDU 533, and connected isochronous PDU 534 may be a connected isochronous PDU transmitted from the first peripheral device to the central device. T_IFS represents time inter frame space and may indicate the time interval between consecutive packets on the same channel index. T_MSS represents the minimum subevent space, and can be, for example, 150 μs.

In subevent 1 (541), the central device transmits a connected isochronous PDU (551), in subevent 2 (542), the central device transmits a connected isochronous PDU (552), and in subevent 3 (543), the central device transmits a connected isochronous PDU (552). 553 is transmitted, and in subevent 4 544, the central device may transmit a connected isochronous PDU 554. Each of the connected isochronous PDU 551, connected isochronous PDU 552, connected isochronous PDU 553, and connected isochronous PDU 554 may be a connected isochronous PDU transmitted from the central device to the peripheral device.

In subevent 1 (541), the second peripheral device transmits a connected isochronous PDU (561), in subevent 2 (542), the second peripheral device transmits a connected isochronous PDU (562), and in subevent 3 (543) The second peripheral device may transmit a connected isochronous PDU (563), and in subevent 4 (544), the second peripheral device may transmit a connected isochronous PDU (564). Each of the connected isochronous PDU 561, connected isochronous PDU 562, connected isochronous PDU 563, and connected isochronous PDU 564 may be a connected isochronous PDU transmitted from the second peripheral device to the central device.

In an audio sharing scheme, one or more audio packets can be provided to an infinite number of audio sink devices. To support audio sharing, a broadcast isochronous group (BIG) and a broadcast isochronous stream (BIS) have been proposed. In an audio sharing scheme, an isochronous broadcaster and synchronized receiver may be required.

BIS can be a logical transport used to deliver one or more isochronous data streams to all devices for BIS within a range. BIS may include one or more sub-events for transmitting isochronous data packets. A sub-event may contain slots through which an infinite number of synchronized receivers can receive the broadcast isochronous PDU. BIS can support the transmission of multiple new isochronous data packets in every BIS event. There is no acknowledgment protocol for BIS, so traffic is unidirectional from the broadcasting device.

BIG can be generated by an isochronous broadcaster. A BIG may contain one or more BISs. Multiple BISs included in the BIG may have a common timing reference based on the broadcaster and may be synchronized in the time domain. For example, the left and right channels of an audio stereo stream, received by separate devices, need to be rendered simultaneously. Multiple BISs included in the BIG can be scheduled sequentially or in an interleaved arrangement.

FIG. 6 is a diagram illustrating the configuration of BIG events and BIS events in a wireless communication network according to an embodiment.

Referring to FIG. 6, each of the BIG events (e.g., BIG event x (601), BIG event x+1 (603), BIG event x+2 (603)) may include two BIS events. For example, BIG event x(601) includes BIS1 event x(611) and BIS2 event x(613), and BIG event x+1(603) includes BIS1 event x+1(621) and BIS2 event x+ 1 (623), and BIG event x+2 (605) may include BIS1 event x+2 (631) and BIS2 event x+2 (633).

A BIG event may include one or more BIS PDUs. The link layer can only transmit BIS PDUs in BIG events. The link layer can only transmit BIS PDUs as part of a BIG event. Each BIG event can be split into Num_BIS BIS events and control sub-events (if present). Each BIS event can be divided into NSE sub-events. Each BIS event begins at a moment called the BIS anchor point and ends after the last subevent of each BIS event. Each BIG event begins at a moment referred to as the BIG anchor point and ends after the control sub-event if there is one, otherwise at the end of the last constituent BIS event.

BIG anchor points can be placed regularly at ISO_Interval intervals. The BIS anchor points for BIS n of the BIG can be (n - 1) Х BIS_Spacing after the BIG anchor points, and thus can be placed regularly ISO_Interval apart. BIS_Spacing is the time between the start of sub-events included in adjacent BISs included in the BIG, and may also be the time between the first sub-event of the last BIS and the start of the control sub-event, if present. Sub-events of each BIS may exist Sub_Interval apart. The isochronous broadcaster may close each BIG event at least T_IFS before the BIG anchor point of the next BIG event.

In BIS1 event x (611), broadcast isochronous PDU (641), broadcast isochronous PDU (643), and broadcast isochronous PDU (645) may be transmitted.

In BIS2 event x (613), broadcast isochronous PDU (651), broadcast isochronous PDU (653), and broadcast isochronous PDU (655) may be transmitted.

At BIS1 event x+1 (621), broadcast isochronous PDU (661), broadcast isochronous PDU (663), and broadcast isochronous PDU (665) may be transmitted.

In BIS2 event x+1 (623), broadcast isochronous PDU (671), broadcast isochronous PDU (673), and broadcast isochronous PDU (675) may be transmitted.

At BIS1 event x+2 (631), broadcast isochronous PDU (681), broadcast isochronous PDU (683), and broadcast isochronous PDU (685) may be transmitted.

At BIS2 event x+2 (633), broadcast isochronous PDU (691), broadcast isochronous PDU (693), and broadcast isochronous PDU (695) may be transmitted.

While the first electronic device, the second electronic device, and the external electronic device are providing audio services (e.g., LE Audio service) based on the BLE method, normal audio may occur due to changes in the radio frequency (RF) environment. Service provision may become impossible. For example, the RF environment may include a first communication link that is a communication link between a first electronic device and an external electronic device, a second communication link that is a communication link between a second electronic device and an external electronic device, and/or a first electronic device and a second electronic device. 2 It may affect the quality of each third communication link, which is a communication link between electronic devices.

If the quality of at least one of the first communication link, the second communication link, or the third communication link falls below the threshold quality due to a change in the RF environment, normal transmission and reception of audio data through the communication link having a quality below the threshold quality will not occur. It may be impossible. For example, because normal transmission and reception of audio data may not be possible through a communication link with a quality below the threshold quality, cases in which sound breaks, sound distortions, roars, and/or silence occur. Various cases such as this case may occur, and service quality may deteriorate as a result.

In one embodiment, the quality of the communication link may be determined based on channel quality. Channel quality is measured by moving average value (e.g. exponential moving average (EMA) value), number of unacked packets during the evaluation period, number of flushed packets during the evaluation period, and noise level. (noise level), block error rate (BLER), frame error rate (FER), bit error rate (BER), packet error rate (PER), reception Received signal strength indicator (RSSI), signal to interference and noise ratio (SINR), signal to noise ratio (SNR), packet retransmission time, number of transmitted packets per unit time It can be expressed by at least one of the number or retransmission rate. In one embodiment, an unacked packet may represent a transmitted packet (e.g., an audio packet) for which an ACK packet was not received as an acknowledgment packet, and a flushed packet may represent a transmitted packet (e.g., an audio packet) that was not transmitted and was dropped (e.g., discarded). : audio packet). In one embodiment, the evaluation section may be a section used to check the quality of the communication link. In one embodiment, the evaluation interval may include a set number of ISO_Intervals. The number of ISO_Intervals included in the evaluation interval may vary depending on the situation of the wireless communication network, and the evaluation interval may be implemented in a form that includes not only ISO_Intervals but also other types of time intervals. The evaluation interval will be described in more detail below with reference to FIGS. 15A and 15B. In one embodiment, channel quality may be detected for each channel, a moving average value for each channel, and the number of unacked packets during the evaluation interval. , Channel quality based on at least one of the number of flushed packets during the evaluation period, noise level, BLER, FER, BER, PER, RSSI, SINR, SNR, packet retransmission time, number of transmitted packets per unit time, or retransmission rate. This can be detected. For example, when the moving average value exceeds the critical moving average value, when the number of unacked packets during the evaluation period exceeds the critical number of unacked packets, and when the number of flushed packets during the evaluation period exceeds the critical number of flushed packets. If the noise level exceeds the threshold noise level, the BLER exceeds the threshold BLER, the RSSI is less than the threshold RSSI, the SINR is less than the threshold SINR, the SNR is less than the threshold SNR, and the BER exceeds the threshold BER. In this case, when the PER exceeds the critical PER, when the packet retransmission time exceeds the critical packet retransmission time, when the number of transmitted packets per unit time is less than the number of transmitted packets per critical unit time, or when the retransmission rate is the critical retransmission rate If at least one of the following occurs, the quality of the communication link may be below the threshold quality.

In this disclosure, the channel quality is measured by moving average value, noise level, number of unacked packets during evaluation period, number of flushed packets during evaluation, BLER, FER, BER, PER, RSSI, SINR, SNR, packet retransmission time, unit The case where it is expressed by at least one of the number of transmitted packets per time or the retransmission rate has been described as an example, but the channel quality is expressed by a moving average value, the number of unacked packets during the evaluation period, the number of flushed packets during the evaluation period, It is not limited to cases indicated by at least one of noise level, BLER, FER, BER, PER, RSSI, SINR, SNR, packet retransmission time, number of transmitted packets per unit time, or retransmission rate. In this disclosure, the expression "the quality of the communication link is below the critical quality" is used, but the expression that the quality of the communication link is below the critical quality means that deterioration occurs in the communication link or that the RF environment is poor (bad). ) can be used interchangeably with expressions.

For example, when the quality of a first communication link, which is one of a plurality of communication links, is below the threshold quality, audio packets (e.g., at least one ISO_Interval) transmitted in a set time interval (e.g., at least one ISO_Interval) in the first communication link. The first audio packet, which is the audio packet transmitted first among the first to sixth audio packets, may be given most of the transmission opportunities among the transmission opportunities provided for the set time interval. Therefore, only minimal transmission opportunities can be given to audio packets transmitted after the first audio packet in the first communication link, which results in cases where sound is broken, sound distortion occurs, and roar occurs. , and/or various cases such as cases where silence occurs, which may lead to a decrease in service quality.

7 is a diagram illustrating an example of transmissions of audio packets in a wireless communication network according to one embodiment.

Referring to Figure 7, transmissions of audio packets (e.g., Packet P0, Packet P1, Packet P2, Packet P3, Packet P4, Packet P5) have NSE of 6 (NSE = 6) and FT of 5 (FT = 5), there may be transmissions of audio packets in the case where BN is 2 (BN = 2). In FIG. 7, one ISO_Interval may include at least six sub-events, and the sub-events included in each of ISO_Interval (711) to ISO_Interval (717) may be the first to sixth sub-events in that order. You can. The transmissions of audio packets shown in FIG. 7 may be transmissions of audio packets in a communication link established between an audio source device and a first audio sink device. For example, the audio source device may be an external electronic device (e.g., the electronic device 101 of Figure 1, or the external electronic device 201 of Figures 2, 3, or 4), and the first audio sink device may be a first electronic device (e.g., the first electronic device 202 of FIG. 2 or FIG. 4), and the communication link may be a first communication link established between an external electronic device and the first electronic device.

In one embodiment, FT is the flush timeout and may indicate the maximum number of CIS events that can be used for a given CIS data PDU (e.g., audio packet) to be transmitted (or retransmitted). For example, FT can be any value between 1 and 255.

In one embodiment, a flush point may be set for each audio packet. A flush point may indicate when an audio packet will be dropped (e.g., discarded) by the link layer. For example, a flush point may indicate the point at which an audio packet is set to be dropped (e.g., discarded).

In one embodiment, BN is the burst number and may indicate the number of new audio packets that can be transmitted within ISO_Interval.

As shown in FIG. 7, in the case of NSE = 6, FT = 5, and BN = 2, if the quality of the communication link is below the critical quality, normal transmission and reception of audio packets may not be possible on the corresponding communication link. In the corresponding communication link, audio packets may not be transmitted normally during the set time interval (e.g., 7 ISO_Intervals (711, 711, 713, 714, 175, 716, 717)).

For example, packet P0 may not be transmitted normally in the first ISO_Interval 711. In this case, packet P0 may be retransmitted up to the flush point set for packet P0. In Figure 7, since the case of FT = 5 is assumed, packet P0 can be retransmitted to the flush point located at the 5th ISO_Interval (715) based on FT = 5, and the packet P0 at the 5th ISO_Interval (715) The location of the flush point can be set based on the value of NSE/BN. In Figure 7, since the case of NSE = 6 and BN = 2 is assumed, the flush point for packet P0 may be located in the third sub-event of the fifth ISO_Interval (715).

In this way, since retransmission for packet P0 is performed up to the flush point located in the third subevent of the fifth ISO_Interval (715), 3 for each of the remaining audio packets, Packet P1, Packet P2, Packet P3, Packet P4, and Packet P5. Only transmission opportunities corresponding to sub-events may be provided. For example, the flush point for packet P1 may be located in the 6th subevent of the 5th ISO_Interval 715, and the flush point for packet P2 may be located in the 3rd subevent of the 6th ISO_Interval 716. , the flush point for packet P3 may be located in the sixth subevent of the sixth ISO_Interval (716), and the flush point for packet P4 may be located in the third subevent of the seventh ISO_Interval (717), The flush point for packet P5 may be located in the sixth sub-event (770) of the seventh ISO_Interval (717).

As the quality of the communication link is below the critical quality, a total of 27 transmission opportunities are provided for packet P0, while a total of 3 transmission opportunities are provided for each of packet P1, packet P2, packet P3, packet P4, and packet P5. can only be given. Therefore, among the transmission opportunities given in the time interval set in the communication link, most of the transmission opportunities are given to packet P0, and the remaining packets transmitted after packet P0, such as packet P1, packet P2, packet P3, packet P4, and packet P5, are given to packet P0. Only minimal transmission opportunities may be given for this, which may result in various cases such as cases in which sound is broken, cases in which sound distortion occurs, cases in which a roar occurs, and/or cases in which silence occurs. This may result in a decrease in service quality. In Figure 7, the transmission opportunity is indicated as "Tx packet count".

An embodiment of the present disclosure can provide a method of stably providing an audio service while reducing (e.g., minimizing) retransmission operations due to deterioration of communication link quality. In the present disclosure, an embodiment is described using an audio service as an example, but the present disclosure covers not only the audio service but also all cooperative communications that the first electronic device, the second electronic device, and the external electronic device can provide in cooperation with each other. It can be applied to coordinated communication services.

FIG. 8 is a flowchart illustrating an example of an operation process of an external electronic device in a wireless communication network according to an embodiment.

Referring to FIG. 8, in operation 811, the processor (e.g., the electronic device 101 of FIG. 1, or the external electronic device 201 of FIG. 2, 3, or 4) of the external electronic device (e.g., the electronic device 101 of FIG. 1) The processor 120 or the processor 304 of FIG. 3) communicates with the first electronic device (e.g., the communication module 190 of FIG. 1 or the communication circuit 302 of FIG. 3) through a communication circuit (e.g., the communication module 190 of FIG. A communication link (eg, first communication link) may be established with the first electronic device 202 of 4. In FIG. 8, the case where the processor establishes a first communication link with the first electronic device is described as an example, but the processor communicates with the second electronic device (e.g., the second electronic device 204 in FIG. 2 or FIG. 4). A link (eg, a second communication link) may be set, and thus operations 813 to 821 applied to the first communication link may also be applied to the second communication link. In one embodiment, operations 813 to 821 applied to the first communication link are third electronic devices established between the first electronic device and the second electronic device (e.g., the second electronic device 204 in FIG. 2 or FIG. 4). It can also be applied to communication links.

In one embodiment, the first communication link may be a CIS connection. Each CIS can be associated with an asynchronous connection-oriented (ACL), CIS supports variable-sized audio packets, and supports transmission of one or more audio packets in each isochronous event. An acknowledgment protocol can be used to improve the reliability of audio packet delivery in CIS.

A detailed description of the operation of the processor setting up the first communication link, according to one embodiment, is as follows.

The processor may assign an identifier to each CIS, and the identifier assigned to the CIS may be CIS_ID. The processor may transmit CIS_ID to the first electronic device through a communication circuit. Each CIS can be defined by the following parameters.

(1) ISO_Interval

ISO_Interval may be the time between CIS anchor points of adjacent CIS events.

(2) Sub_Interval

Sub_Interval may be the time between the start of two consecutive sub-events of the CIS.

(3) SE_Length

SE_Length may be the maximum length of the sub-event.

(4) Max_PDU

Max_PDU may be the maximum number of data octets that can be transmitted in each CIS data PDU (e.g., audio packet), and the value of Max_PDU may be different in each direction. In one embodiment, each direction may be from a central device (e.g., an audio source device) to a peripheral device (e.g., an audio sink device), or from a peripheral device to a central device. In one embodiment, the external electronic device may be an audio source device, and the first electronic device may be an audio sink device.

(5) Max_SDU

Max_SDU may be the maximum size of a service data unit (SDU) in CIS, and the value of Max_SDU may be different in each direction.

(6) MPT _M and MPT _S

MPT _M may be the time it takes for the master device to transmit a packet containing a CIS PDI with a payload of Max_PDU octets on the physical channel being used for CIS.

MPT _S may be the time it takes for a slave device to transmit a packet containing a CIS PDI with a payload of Max_PDU octets on the physical channel being used for CIS.

MPT _M and MPT _S may be the same.

(7) NSE

NSE may be the maximum number of sub-events in each CIS event.

(8) BN and FT

BN and FT can control what data is transmitted in each CIS event, and the values of each BN and FT can be different in each direction.

(8) Framed

Framed may indicate whether the CIS carries framed or unframed data. The value of Framed can be the same in both directions.

In one embodiment, parameters such as ISO_Interval, Sub_Interval, SE_Length, Max_PDU, Max_SDU, MPT _M and MPT _S , NSE, BN and FT, and Framed may not change during the lifetime of the CIS.

In operation 813, the processor that has established a first communication link with the first electronic device may transmit audio packets to the first electronic device through a communication circuit in the established first communication link.

The processor that transmitted the audio packets may receive response packets for the audio packets through communication circuitry in the first communication link at operation 815. In one embodiment, the response packet may be an acknowledgment (ACK) packet or a non-acknowledgment (NACK) packet.

The processor that has received response packets for audio packets may check the quality of the first communication link based on the received response packets in operation 817. In one embodiment, the processor may transmit audio packets during an evaluation period and determine the quality of the first communication link based on response packets received for audio packets transmitted during the evaluation period. In one embodiment, the evaluation interval may include a set number of ISO_Intervals. The number of ISO_Intervals included in the evaluation interval may vary depending on the situation of the wireless communication network, and the evaluation interval may be implemented in a form that includes not only ISO_Intervals but also other types of time intervals. The evaluation section will be described in more detail below with reference to FIGS. 15A and 15B.

In one embodiment, the processor configures the moving average value, number of unacked packets during the evaluation interval, number of flushed packets during the evaluation interval, noise level, BLER, FER, BER, PER, RSSI, SINR, SNR, packet retransmission time, The quality of the first communication link can be confirmed based on at least one of the number of transmission packets per unit time or the retransmission rate. For example, when the moving average value exceeds the critical moving average value, when the number of unacked packets during the evaluation period exceeds the critical number of unacked packets, and when the number of flushed packets during the evaluation period exceeds the critical number of flushed packets If the noise level exceeds the threshold noise level, the BLER exceeds the threshold BLER, the RSSI is less than the threshold RSSI, the SINR is less than the threshold SINR, and the SNR is less than the threshold SNR, the BER exceeds the threshold BER In this case, if the PER exceeds the critical PER, if the packet retransmission time exceeds the critical packet retransmission time, if the number of transmitted packets per unit time is less than the number of transmitted packets per critical unit time, or if the retransmission rate is less than the critical retransmission time If at least one of the cases exceeds the ratio occurs, the quality of the communication link may be below the threshold quality. 8, for example, it is assumed that the moving average value is an EMA value, and therefore the processor may check the quality of the first communication link based on the EMA value in operation 817. Processor confirming the quality of the first communication link In operation 819, it may be checked whether the quality of the first communication link is above the threshold quality. For example, the processor may determine that the quality of the first communication link is above the threshold quality if the EMA value of the first communication link is below the threshold EMA value, or, conversely, if the EMA value of the first communication link exceeds the threshold EMA value. In this case, it can be confirmed that the quality of the first communication link is below the critical quality. In one embodiment, the threshold EMA value may be determined based on the size of the payload included in the audio packet. The size of a payload containing high-quality audio data (e.g., audio data above a threshold sound quality) may be larger than the size of a payload containing low-quality audio data (e.g., audio data below a threshold sound quality). For example, the threshold EMA value determined when the size of the payload included in the audio packet is greater than or equal to the threshold size may be different from the threshold EMA value determined when the size of the payload included in the audio packet is less than the threshold size. . For example, the critical EMA value determined when the size of the payload included in the audio packet is greater than or equal to the threshold size may be smaller than the critical EMA value determined when the size of the payload included in the audio packet is less than the threshold size. there is.

If the quality of the first communication link is above the threshold quality, the processor may return to operation 813.

If the quality of the first communication link is below the threshold quality, the processor may perform a packet drop operation on the first communication link in operation 821. The packet drop operation involves dropping (e.g., discarding) audio packets before flush points for audio packets in a communication link below a threshold quality and transmitting drop indication packets directing the drop of the audio packets. It could be a movement. The drop indication packet may include information indicating dropping an audio packet.

In one embodiment, the packet drop operation is described as follows.

The threshold quality may be the quality of the communication link corresponding to the threshold value. The threshold may be set based on the retransmission rate during the evaluation period, the EMA value of the retransmission rate, the number of unacked packets, or the number of flushed packets.

For example, the quality of a communication link may be divided into first quality (e.g., Good RF quality), second quality (e.g., Bad RF quality), and third quality (e.g., Very Bad RF). The first quality refers to the quality of the communication link that is above the first threshold, the second quality refers to the quality of the communication link that is below the first threshold and above the second threshold, and the third quality refers to the quality of the communication link that is below the second threshold. It can refer to the quality of the communication link. Based on whether the quality of the communication link is a first quality, a second quality, or a third quality, the processor may perform a packet drop operation corresponding to the quality and control (or adjust) the flush point. .

17 shows the first quality 1701 (e.g., Good RF quality), the second quality 1703 (e.g., Bad RF quality) when the first threshold is 50 and the second threshold is 75. 3 Quality 1705 (e.g. Very Bad RF) is shown. In Figure 17, "Cal.retran rate" represents the retransmission rate during the evaluation section, "EMA" represents the EMA value of the retransmission rate during the evaluation section, and "unacked count" represents the number of unacked packets during the evaluation section. and “flushed count” may indicate the number of flushed packets during the evaluation period. In FIG. 17, the horizontal axis may be a time axis, and its unit may be seconds. In FIG. 17, the vertical axis may be a retransmission rate axis, and the unit may be a percentage. The graph shown in FIG. 17 may be a graph showing the quality of the communication link when an external electronic device moves from a strong electric field area to a weak electric field area and then moves from a weak electric field area to a strong electric field area again. General wireless communication In the network, transmission opportunities are given that are determined based on the FT and flush point established for audio data packets, as explained in Figure 7, so that if the quality of the communication link is below the threshold quality, Among audio packets transmitted in a set time interval (e.g., at least one ISO_Interval), the first audio packet, which is the first audio packet transmitted, may be given most of the transmission opportunities among the transmission opportunities given for the set time interval. This inequality in terms of transmission opportunities can ultimately lead to a decrease in service quality, and therefore, in the present disclosure, a packet is dropped before the flush points set for the audio packets that are transmitted on a communication link with less than a threshold quality. Drop motion can be provided. In this way, it is possible to eliminate the inequality in terms of transmission opportunities by making it possible to drop audio packets being transmitted on a communication link below the critical quality before the flush points set for the corresponding audio packets, thereby improving the quality of service. You can do it.

According to one embodiment, the processor may perform a packet drop operation at a set packet drop rate. For example, the processor may perform a packet drop operation at a packet drop ratio of 2:1 when the quality of the communication link is below a threshold quality. When the packet drop ratio is 2:1, the processor may drop the audio packet immediately following the two successfully transmitted audio packets for each time there are two successfully transmitted audio packets. The processor that dropped the audio packet may generate a drop instruction packet instructing to drop the audio packet and transmit the generated drop instruction packet to the first electronic device through a communication circuit. As another example, the processor may perform a packet drop operation at a packet drop ratio of 1:1 when the quality of the communication link is below a threshold quality. When the packet drop ratio is 1:1, the processor can drop the audio packet immediately following one successfully transmitted audio packet for each successfully transmitted audio packet. The processor that dropped the audio packet may generate a drop instruction packet and transmit the generated drop instruction packet to the first electronic device through a communication circuit.

According to one embodiment, the drop indication packet may be implemented as an empty (E) packet, a null (N) packet, or a special packet. In one embodiment, the special packet may be implemented as a predefined packet between an external electronic device (e.g. a central device) and a first electronic device (e.g. a first peripheral device), or as an ISO data packet (e.g. It may be implemented as at least part of the RFU (reserved for future use) field included in the ISO header field included in the audio packet. In one embodiment, the RFU field included in the header field of the null packet may include information indicating that the packet is a drop indication packet. In this case, the null packet containing information indicating that it is a drop indication packet is a special packet. It can be. In one embodiment, the special packet may include a header field and a payload field, the payload length of the payload field is set to 1 byte, and a set value (e.g., 0xff) is set to the payload field. It can be included. The special packet containing the setting value may be a drop instruction packet. In one embodiment, the payload included in the special packet may include information associated with dropping an audio packet. For example, information associated with an audio packet drop may be information indicating that the packet is a drop instruction packet, information requesting that a packet drop operation be performed on the communication link over which the special packet is sent, or information on the communication link over which the special packet is being sent. may include at least one of information about when the packet drop operation will be performed.

FIG. 9 is a flowchart illustrating an example of an operation process of a first electronic device in a wireless communication network according to an embodiment.

Referring to FIG. 9, in operation 911, a processor (e.g., processor 410 of FIG. 4) of a first electronic device (e.g., first electronic device 202 of FIG. 2 or FIG. 4) performs a communication circuit (e.g., FIG. A communication link (e.g., the electronic device 101 of FIG. 1, or the external electronic device 201 of FIG. 2, 3, or 4) with an external electronic device (e.g., the electronic device 101 of FIG. 1, or the external electronic device 201 of FIG. 2, FIG. 3, or FIG. 4) through the communication circuit 420 of 1 communication link) can be set. In FIG. 9, the case where the processor establishes a first communication link with an external electronic device is described as an example, but the processor establishes a communication link with a second electronic device (e.g., the second electronic device 204 in FIG. 2 or FIG. 4). (e.g., a third communication link) may be set, and thus operations 913 to 917 applied to the first communication link may also be applied to the third communication link. In one embodiment, operations 913 to 917 applied to the first communication link are operations determined between the first electronic device and the second electronic device (e.g., the second electronic device 204 of FIG. 2 or FIG. 4). 3 Can also be applied to communication links. The operation of establishing the first communication link between the first electronic device and the external electronic device may be similar to or substantially the same as the operation of establishing the first communication link between the external electronic device and the first electronic device described in FIG. 8. Therefore, the detailed description will be omitted.

The processor that has established a first communication link with the external electronic device may receive audio packets through a communication circuit in the established first communication link in operation 913.

In operation 915, the processor may check whether a drop indication packet is included among the received audio packets (for example, it may check whether a drop indication packet has been received). The drop instruction packet may be implemented similarly or substantially the same as that described in FIG. 8, and therefore detailed description thereof will be omitted.

If the drop instruction packet is not received, the processor may perform an audio playback operation on the received audio packets in operation 917.

When the drop instruction packet is received, the processor may confirm in operation 919 that a packet drop operation is being performed on the first communication link and that the audio packet being transmitted on the first communication link has therefore been dropped. After confirming that the audio packet is dropped, the processor can restore the dropped audio packet by performing a packet loss concealment (PLC) operation on the dropped audio packet, and perform an audio playback operation in operation 917. In one embodiment, the PLC operation may be an operation to recover audio packets.

If the quality of the first communication link is less than the critical quality, the external electronic device may perform a packet drop operation on the first communication link, as described in FIG. 8. In a wireless communication network, as described in FIG. 7, audio data packets are given transmission opportunities determined based on FT and flush points, so that when the quality of the communication link is below the threshold quality, a set time interval in the communication link Among the audio packets transmitted, the first audio packet, which is the first audio packet transmitted, may be given most of the transmission opportunities among the transmission opportunities given for the set time interval, and the remaining audio packets after the first audio packet may be given. For this, only minimal transmission opportunities can be given. This inequality in terms of transmission opportunities can ultimately lead to a decrease in service quality, and as explained in FIG. 8, the external electronic device performs a packet drop operation on a communication link with less than a threshold quality, thereby flushing the audio packets. You can drop (e.g., discard) before points and send a drop indication packet instructing to drop the audio packet. The processor that has received the drop instruction packet sent from the external electronic device can confirm that the audio packet is dropped because it has received the drop instruction packet, even if the flush points for the audio packets have not been reached, and can confirm that the audio packet is dropped. By performing a PLC operation, the dropped audio packet can be restored, and thus audio packets following the dropped audio packet can be received.

In this way, it is possible to eliminate the inequality in terms of transmission opportunities by making it possible to drop audio packets being transmitted on a communication link below the critical quality before the flush points set for the corresponding audio packets, thereby improving the quality of service. You can do it.

Additionally, although not separately shown in FIG. 9, the processor may transmit response packets for audio packets received in operation 913. For example, the response packet may be an ACK packet or a NACK packet.

10 is a diagram illustrating another example of transmissions of audio packets in a wireless communication network according to one embodiment.

Referring to Figure 10, transmissions 1000 and 1005 of audio packets (e.g., Packet P0, Packet P1, Packet P2, Packet P3, Packet P4, Packet P5, Packet P6, Packet P7, Packet P8) are transmitted by the NSE. 6 (NSE = 6), FT is 5 (FT = 5), and BN is 2 (BN = 2). In Figure 10, one ISO_Interval may include at least six sub-events, and the sub-events included in each of ISO_Interval (1011) to ISO_Interval (1017) may be the first to sixth sub-events in that order. You can. Transmissions 1000, 1005 of audio packets shown in FIG. 10 may be transmissions of audio packets in a communication link established between an audio source device and a first audio sink device. For example, the audio source device may be an external electronic device (e.g., the electronic device 101 of Figure 1, or the external electronic device 201 of Figures 2, 3, or 4), and the first audio sink device may be a first electronic device (e.g., the first electronic device 202 of FIG. 2 or FIG. 4), and the communication link may be a first communication link established between an external electronic device and the first electronic device.

As shown in Figure 10, in the case of NSE = 6, FT = 5, BN = 2, if the quality of the communication link is below the threshold quality, packet P0 may not be transmitted normally in the first ISO_Interval (1011). there is. In this case, in a general wireless communication network, packet P0 may be retransmitted up to the flush point set for packet P0. In Figure 10, since the case of FT = 5 is assumed, packet P0 can be retransmitted to the flush point located at the 5th ISO_Interval (1015) based on FT = 5, and the packet P0 at the 5th ISO_Interval (1015) The flush point can be set based on the value of NSE/BN. In Figure 10, since the case of NSE = 6 and BN = 2 is assumed, the flush point for packet P0 may be located in the third sub-event in the fifth ISO_Interval (1015). In FIG. 10, the flush point for packet Pn is shown in the form of “Pn flush point,” where n may be an integer of 0 or more.

In this way, when retransmission of packet P0 is performed up to the flush point located in the third sub-event (1020) of the fifth ISO_Interval (1015), the remaining audio packets, packet P1, packet P2, packet P3, packet P4, and packet P5 For each, only transmission opportunities corresponding to three sub-events can be provided. For example, the flush point for packet P1 may be located in the 6th sub-event of the 5th ISO_Interval (1015), and the flush point for packet P2 may be located in the 3rd sub-event of the 6th ISO_Interval (1016). The flush point for packet P3 may be located in the 6th sub-event of the 6th ISO_Interval (1016), and the flush point for packet P4 may be located in the 3rd sub-event of the 7th ISO_Interval (1017) , the flush point for packet P5 may be located in the 6th sub-event of the 7th ISO_Interval (1017).

As the quality of the communication link is below the critical quality, in a typical wireless communication link, a total of 27 transmission opportunities are given to packet P0, while a total of 27 transmission opportunities are provided to each of packet P1, packet P2, packet P3, packet P4, and packet P5. Only a total of 3 transmission opportunities can be given for this.

In contrast, in the present disclosure, when the quality of the communication link is below the threshold quality, a packet drop operation may be performed on the communication link below the threshold quality. For example, the external electronic device may decide to perform a packet drop operation on a communication link with a quality lower than the threshold, drop the corresponding audio packet based on the decision, and then transmit a drop instruction packet.

The external electronic device may drop the corresponding audio packet before the flush point at a set packet drop rate. In Figure 10, the transmissions of audio packets shown with reference numeral 1000 may be transmissions of audio packets when the set packet drop ratio is 2:1. As an example, if the quality of the communication link is below the first threshold quality (e.g., if the quality of the communication link is a second quality), the packet drop ratio may be 2:1. In Figure 10, the transmissions of audio packets shown at reference numeral 1005 may be transmissions of audio packets when the set packet drop ratio is 1:1. As an example, when the quality of the communication link is below the second threshold quality (eg, when the quality of the communication link is a third quality), the packet drop ratio may be 1:1. The second quality may be a better quality than the third quality, and the first quality may be a quality that allows normal audio packet transmission and reception in the corresponding communication link.

When the set packet drop ratio is 2:1, the external electronic device can drop the audio packet immediately following the two successfully transmitted audio packets every time there are two successfully transmitted audio packets and transmit a drop instruction packet. (1000).

A detailed description of the transmissions (1000) of audio packets when the set ratio is 2:1 is as follows.

The external electronic device may receive an ACK packet for packet P0 in the third sub-event of the first ISO_Interval (1011) and may receive an ACK packet for packet P1 in the fifth sub-event of the third ISO_Interval (1013). In FIG. 10, “ACK” may indicate that an ACK packet is received at that point in time. In Figure 10, it is assumed that the drop indication packet is implemented as an E packet. Receiving an ACK packet for a specific audio packet means that transmission of the specific audio packet was successful. Therefore, if the external electronic device successfully transmits two audio packets (e.g., packet P0 and packet P1), The audio packet (e.g., packet P2) immediately following the two successfully transmitted audio packets may be dropped.

The external electronic device that dropped packet P2 may transmit a drop instruction packet 1020 for packet P2 in the sixth sub-event of the third ISO_Interval 1013. The external electronic device may receive an ACK packet for the drop indication packet 1020 for packet P2 in the sixth sub-event of the third ISO_Interval 1013.

The external electronic device may receive an ACK packet for packet P3 in the second sub-event of the fifth ISO_Interval (1015) and may receive an ACK packet for packet P4 in the first sub-event of the sixth ISO_Interval (1016). If transmission of two audio packets (e.g., packet P3 and packet P4) is successful, the external electronic device may drop the audio packet (e.g., packet P5) immediately following the two successfully transmitted audio packets.

The external electronic device that dropped packet P5 may transmit a drop instruction packet 1030 for packet P5 in the second sub-event of the sixth ISO_Interval 1016. The external electronic device may receive an ACK packet for the drop indication packet 1030 for packet P5 in the second sub-event of the sixth ISO_Interval 1016.

The external electronic device may receive an ACK packet for packet P6 in the 6th sub-event of the 6th ISO_Interval (1016) and may receive an ACK packet for packet P7 in the 5th sub-event of the 7th ISO_Interval (1017). If transmission of two audio packets (e.g., packet P6 and packet P7) is successful, the external electronic device may drop the audio packet (e.g., packet P8) immediately following the two successfully transmitted audio packets.

The external electronic device that dropped packet P8 may transmit a drop instruction packet 1040 for packet P8 in the 6th sub-event of the 7th ISO_Interval (1017). The external electronic device may receive an ACK packet for the drop instruction packet 1040 for packet P8 in the 6th sub-event of the 7th ISO_Interval 1017.

If the set ratio is 1:1, the external electronic device may drop the audio packet immediately following the successfully transmitted audio packet when there is one successfully transmitted audio packet and transmit a drop instruction packet (1005).

A detailed description of the transmissions 1005 of audio packets when the set ratio is 1:1 is as follows.

The external electronic device may receive an ACK packet for packet P0 in the fifth sub-event of the second ISO_Interval (1012). When transmission of one audio packet (e.g., packet P0) is successful, the external electronic device may drop the audio packet (e.g., packet P1) immediately following the successfully transmitted audio packet.

The external electronic device that dropped packet P1 may transmit a drop instruction packet 1060 for packet P1 in the sixth sub-event of the second ISO_Interval 1012. The external electronic device may receive an ACK packet for the drop indication packet 1060 for packet P1 in the sixth sub-event of the second ISO_Interval 1012.

The external electronic device may receive an ACK packet for packet P2 in the second sub-event of the fourth ISO_Interval (1014). The external electronic device that receives the ACK packet for packet P2 may decide to immediately drop the next audio packet (eg, packet P3).

The external electronic device that dropped packet P3 may transmit a drop instruction packet 1070 for packet P3 in the third sub-event of the fourth ISO_Interval 1014. The external electronic device may receive an ACK packet for the drop indication packet 1070 for packet P3 in the third sub-event of the fourth ISO_Interval 1014.

The external electronic device may receive an ACK packet for packet P4 in the second sub-event of the sixth ISO_Interval (1016). The external electronic device that receives the ACK packet for packet P4 may decide to immediately drop the next audio packet (eg, packet P5).

The external electronic device that dropped packet P5 may transmit a drop instruction packet 1080 for packet P5 in the third sub-event of the sixth ISO_Interval 1016. The external electronic device may receive an ACK packet for the drop instruction packet 1080 for packet P5 in the third sub-event of the sixth ISO_Interval 1016.

11 is a diagram illustrating another example of transmissions of audio packets in a wireless communication network according to one embodiment.

Referring to Figure 11, transmissions of audio packets (e.g., Packet P0, Packet P1, Packet P2, Packet P3, Packet P4, Packet P5) have NSE of 6 (NSE = 6) and FT of 5 (FT = 5), there may be transmissions of audio packets in the case where BN is 2 (BN = 2). In FIG. 11, one ISO_Interval may include at least six sub-events, and the sub-events included in each of ISO_Interval (1111) to ISO_Interval (1117) may be the first to sixth sub-events in that order. You can. The transmissions of audio packets shown in FIG. 11 may be audio transmissions when the quality of the communication link is below a second threshold quality (eg, when the quality of the communication link is a third quality). The transmissions of audio packets shown in FIG. 11 may be transmissions of audio packets in a communication link established between an audio source device and a first audio sink device. For example, the audio source device may be an external electronic device (e.g., the electronic device 101 of Figure 1, or the external electronic device 201 of Figures 2, 3, or 4), and the first audio sink device may be a first electronic device (e.g., the first electronic device 202 of FIG. 2 or FIG. 4), and the communication link may be a first communication link established between an external electronic device and the first electronic device.

As shown in Figure 11, in the case of NSE = 6, FT = 5, BN = 2, if the quality of the communication link is below the threshold quality, packet P0 may not be transmitted normally in the first ISO_Interval (1111). there is. In this case, packet P0 may be retransmitted up to the flush point set for packet P0. In Figure 11, since the case of FT = 5 is assumed, packet P0 can be retransmitted up to the flush point located at the 5th ISO_Interval (1115) based on FT = 5, and the packet P0 at the 5th ISO_Interval (1115) The flush point can be set based on the value of NSE/BN. In Figure 11, since the case of NSE = 6 and BN = 2 is assumed, the flush point for packet P0 may be located in the third sub-event in the fifth ISO_Interval (1115). In FIG. 11, the flush point for packet Pn is shown in the form of “Pn flush point,” where n may be an integer of 0 or more.

In this way, since retransmission for packet P0 is performed up to the flush point located in the third subevent of the 5th ISO_Interval (1115), 3 for each of the remaining audio packets, Packet P1, Packet P2, Packet P3, Packet P4, and Packet P5. Only transmission opportunities corresponding to sub-events may be provided. For example, the flush point for packet P1 may be located in the 6th subevent of the 5th ISO_Interval (1115), and the flush point for packet P2 may be located in the 3rd subevent of the 6th ISO_Interval (1116). The flush point for packet P3 may be located in the 6th sub-event of the 6th ISO_Interval (1116), and the flush point for packet P4 may be located in the 3rd sub-event of the 7th ISO_Interval (1117), The flush point for packet P5 may be located in the 6th sub-event of the 7th ISO_Interval (1117).

As the quality of the communication link is below the critical quality, a total of 27 transmission opportunities are provided for packet P0, while a total of 3 transmission opportunities are provided for each of packet P1, packet P2, packet P3, packet P4, and packet P5. can only be given. Therefore, among the transmission opportunities given in the time interval set in the communication link, most of the transmission opportunities are given to packet P0, and the remaining packets transmitted after packet P0, such as packet P1, packet P2, packet P3, packet P4, and packet P5, are given to packet P0. Only minimal transmission opportunities may be given for this, which may result in various cases such as cases in which sound is broken, cases in which sound distortion occurs, cases in which a roar occurs, and/or cases in which silence occurs. This may result in a decrease in service quality. In Figure 11, the transmission opportunity is indicated as "Tx packet count".

The present disclosure may provide a method for adjusting the flush point for an audio packet (eg, flush point adjustment operation) based on the quality of the communication link. In the present disclosure, an embodiment is described using an audio service as an example, but the present disclosure covers not only the audio service but also all cooperative communications that the first electronic device, the second electronic device, and the external electronic device can provide in cooperation with each other. Can be applied to services. In one embodiment, the flush point for an audio packet can be adjusted based on various algorithms.

According to one embodiment, when the flush point adjustment operation is performed, in the case of NSE = 6, FT = 5, and BN = 2 as described in FIG. 11, packet P0, packet P1, packet P2, packet P3, packet The locations of sub-events containing flush points for each of P4 and packet P5 can be shown in Table 1 below.

[Table 1]

In Table 1, the first quality may be the quality of the communication link that is above a first threshold quality.

In Table 1, the second quality may be the quality of the communication link that is below the first threshold quality and above the second threshold quality.

In Table 1, the third quality may be the quality of the communication link that is below the second threshold quality.

Among the first quality, second quality, and third quality, the first quality may be the best quality.

Table 1 shows the locations of sub-events including flush points for each of packet P0, packet P1, packet P2, packet P3, packet P4, and packet P5 when the quality of the communication link is divided into three qualities. . For example, if the quality of the communication link is first quality, assume that the position of the subevent containing the flush point for each of packet P0, packet P1, packet P2, packet P3, packet P4, and packet P5 is "0". can do.

The locations of the sub-events containing flush points for audio packets when the quality of the communication link is a second quality are the locations of the sub-events containing flush points for audio packets when the quality of the communication link is a first quality. It may be different from If the quality of the communication link changes from a first quality to a second quality (eg, the quality of the communication link becomes poor), flush points for audio packets may be adjusted.

As shown in Table 1, when the quality of the communication link is the second quality, the position of the subevent containing the flush point for packet P0 changes from "0" to "-6", and the flush point for packet P1 The position of the sub-event containing is changed from "0" to "-6", the position of the sub-event containing the flush point for packet P2 is changed from "0" to "-3", and the position of the sub-event containing the flush point for packet P3 is changed from "0" to "-3". The position of the sub-event containing the flush point is changed from "0" to "-3", the position of the sub-event containing the flush point for packet P4 remains at "0", and the position of the sub-event containing the flush point for packet P5 is changed from "0" to "-3". The position of the included sub-event may be maintained as “0”. In Table 1, a negative number indicates that the location of the sub-event containing the flush point for the corresponding audio packet when the communication link quality is the second quality or the third quality is located in the corresponding audio packet when the communication link quality is the first quality. This may mean how many sub-events precede the location of the sub-event including the flush point in the time domain. The flush point is set based on the value of NSE/BN, and since the case of NSE = 6 and BN = 2 is assumed in Figure 11, the location of the sub-event containing the flush point for the corresponding audio packet is NSE/BN = 6. /2 = Can be moved to multiples of 3. When the quality of the communication link is the second quality, compared to the case where the quality of the communication link is the first quality, the positions of the sub-event containing the flush point in units of two audio packets equal to the number of BN are -3 and -. It can be shifted to advance in the time domain by 6.

The locations of sub-events containing flush points for packets when the quality of the communication link is a third quality are the locations of sub-events containing flush points for packets when the quality of the communication link is a first quality. Alternatively, the flush points for packets when the quality of the communication link is second quality may be different from the locations of the included sub-event. The quality of the communication link changes from first quality to second or third quality, or the quality of the communication link changes from second quality to third quality (for example, the quality of the communication link becomes poor). , flush points for audio packets can be adjusted. As shown in Table 1, when the quality of the communication link is third quality, the position of the subevent containing the flush point for packet P0 changes from "0" to "-15", and the flush point for packet P1 The position of the sub-event containing is changed from "0" to "-12", the position of the sub-event containing the flush point for packet P2 is changed from "0" to "-9", and the position of the sub-event containing the flush point for packet P3 is changed from "0" to "-9". The position of the sub-event containing the flush point is changed from "0" to "-6", the position of the sub-event containing the flush point for packet P4 is changed from "0" to "-3", and the position of the sub-event containing the flush point for packet P5 is changed from "0" to "-3". The position of the sub-event containing the flush point for may be maintained as “0”. The flush point is set based on the value of NSE/BN, and in Figure 11, the case of NSE = 6 and BN = 2 is assumed, so the location of the sub-event containing the flush point for the corresponding audio packet is NSE/BN = 6/ 2 = Can be moved to multiples of 3. When the quality of the communication link is the third quality, compared to when the quality of the communication link is the first quality, for all audio packets, the location of the sub-event containing the flush point of the corresponding audio packet is timed by a multiple of -3. It can be moved to take precedence in the domain.

By adjusting the flush point for audio packets based on the quality of the communication link as shown in Table 1, it is possible to maintain adequate transmission opportunities for audio packets even when the quality of the communication link falls below a threshold quality, and thus The issue of being given too many transmission opportunities only for specific audio packets can be resolved.

12 is a diagram illustrating another example of transmissions of audio packets in a wireless communication network according to one embodiment.

Referring to FIG. 12, transmissions of audio packets (e.g., Packet P0, Packet P1, Packet P2, Packet P3, Packet P4, Packet P5) have NSE of 6 (NSE = 6) and FT of 5 (FT = 5), there may be transmissions of audio packets in the case where BN is 2 (BN = 2). In FIG. 12, one ISO_Interval may include at least six sub-events, and the sub-events included in each of ISO_Interval (1211) to ISO_Interval (1217) may be the first to sixth sub-events in that order. You can. Transmissions of audio packets 1200, 1205 shown in FIG. 12 may be transmissions of audio packets in a communication link established between an audio source device and a first audio sink device. For example, the audio source device may be an external electronic device (e.g., the electronic device 101 of Figure 1, or the external electronic device 201 of Figures 2, 3, or 4), and the first audio sink device may be a first electronic device (e.g., the first electronic device 202 of FIG. 2 or FIG. 4), and the communication link may be a first communication link established between an external electronic device and the first electronic device.

As shown in Figure 12, in the case of NSE = 6, FT = 5, BN = 2, if the quality of the communication link is below the threshold quality, packet P0 may not be transmitted normally in the first ISO_Interval (1211). there is. In this case, in a general wireless communication network, packet P0 may be retransmitted up to the flush point set for packet P0. In Figure 12, since the case of FT = 5 is assumed, packet P0 can be retransmitted to the flush point located at the 5th ISO_Interval (1215) based on FT = 5, and the packet P0 at the 5th ISO_Interval (1215) The flush point can be set based on the value of NSE/BN. In FIG. 12, since the case of NSE = 6 and BN = 2 is assumed, the flush point for packet P0 may be located in the third sub-event in the fifth ISO_Interval (1215). In FIG. 12, the flush point for packet Pn is shown in the form of “Pn flush point,” where n may be an integer of 0 or more.

In the present disclosure, if the quality of the communication link is below the threshold quality, a flush point adjustment operation may be performed on the corresponding communication link. Flush points for audio packets may be adjusted according to the flush point adjustment operation, and audio packets may be transmitted based on the adjusted flush points. 12, the transmissions of audio packets, shown at 1200, may be transmissions of audio packets when the quality of the communication link is a second quality (e.g., when the quality of the communication link is below a first threshold quality). The transmissions of audio packets, shown at reference numeral 1205, may be transmissions of audio packets when the quality of the communication link is a third quality (eg, when the quality of the communication link is below a second threshold quality).

When the quality of the communication link is the second quality, the external electronic device may adjust flush points for audio packets and transmit audio packets based on the adjusted flush points (1200).

Transmissions 1200 of audio packets when the quality of the communication link is second quality will be described in detail as follows.

In a general wireless communication network, default flush points set for packet P0 to packet P5 may be used. The default flush point for packet P0 may be located at the third subevent in the fifth ISO_Interval (1215), and the default flush point for packet P1 may be located at the sixth subevent of the fifth ISO_Interval (1215), The default flush point for packet P2 may be located at the third subevent of the sixth ISO_Interval (1216), and the default flush point for packet P3 may be located at the sixth subevent of the sixth ISO_Interval (1216), The default flush point for packet P4 may be located in the third subevent of the seventh ISO_Interval (1217), and the default flush point for packet P5 may be located in the sixth subevent of the seventh ISO_Interval (1217).

In this way, when the quality of the communication link becomes the second quality while the default flush points are being used for packets P0 to packet P5, the external electronic device can adjust the flush points for packets P0 to packet P5. If the quality of the communication link is second quality, the adjusted flush point for packet P0 may be located at the third subevent in the fourth ISO_Interval (1214), and the adjusted flush point for packet P1 may be located at the fourth ISO_Interval (1214). 1214), the adjusted flush point for packet P2 may be located at the 6th sub-event of the 5th ISO_Interval (1215), and the adjusted flush point for packet P3 may be located at the 6th sub-event The adjusted flush point for packet P4 may be located at the third subevent of the ISO_Interval (1216), and the adjusted flush point for packet P5 may be located at the third subevent of the seventh ISO_Interval (1217). It may be located in the 6th sub-event of the 7th ISO_Interval (1217).

When the quality of the communication link is third quality, the external electronic device may adjust flush points for audio packets and transmit audio packets based on the adjusted flush points (1205).

Transmissions 1205 of audio packets when the quality of the communication link is third quality will be described in detail as follows.

The default flush points set for packets P0 to packet P5 in a wireless communication network may be the same as the default flush points set for packets P0 to packet P5 described when the quality of the communication link is second quality, and therefore the detailed The explanation will be omitted. According to one embodiment, when the quality of the communication link is third quality, the external electronic device can adjust flush points for packets P0 to packets P5. If the quality of the communication link is third quality, the adjusted flush point for packet P0 may be located at the sixth subevent in the second ISO_Interval (1212), and the adjusted flush point for packet P1 may be located at the third subevent in the third ISO_Interval (1212). 1213), the adjusted flush point for packet P2 may be located in the 6th sub-event of the fourth ISO_Interval (1214), and the adjusted flush point for packet P3 may be located in the 5th sub-event The adjusted flush point for packet P4 may be located at the sixth subevent of the ISO_Interval (1215), and the adjusted flush point for packet P5 may be located at the sixth subevent of the sixth ISO_Interval (1216). It may be located in the 6th sub-event of the 7th ISO_Interval (1217).

FIG. 13 is a flowchart illustrating another example of an operation process of an external electronic device in a wireless communication network according to an embodiment.

Referring to FIG. 13, in operation 1311, the processor (e.g., the electronic device 101 of FIG. 1, or the external electronic device 201 of FIG. 2, 3, or 4) of the external electronic device (e.g., the electronic device 101 of FIG. 1) The processor 120 or the processor 304 of FIG. 3) communicates with the first electronic device (e.g., the communication module 190 of FIG. 1 or the communication circuit 302 of FIG. 3) through a communication circuit (e.g., the communication module 190 of FIG. A communication link (eg, first communication link) may be established with the first electronic device 202 of 4. In FIG. 13, the case where the processor establishes a first communication link with the first electronic device is described as an example, but the processor communicates with the second electronic device (e.g., the second electronic device 204 in FIG. 2 or FIG. 4). A link (eg, a second communication link) may be set, and therefore operations 1313 to 1321 applied to the first communication link may also be applied to the second communication link. In one embodiment, operations 1313 to 1321 applied to the first communication link are the third electronic device established between the first electronic device and the second electronic device (e.g., the second electronic device 204 in FIG. 2 or FIG. 4). It can also be applied to communication links.

In one embodiment, the first communication link may be a CIS connection, and the operation of the processor establishing the first communication link is similar to the operation of the external electronic device establishing the first communication link described in operation 811 of FIG. 8, or They can be implemented substantially the same, and therefore detailed description thereof will be omitted.

In operation 1313, the processor that has established a first communication link with the first electronic device may transmit audio packets to the first electronic device through a communication circuit in the established first communication link.

The processor that transmitted the audio packets may receive response packets for the audio packets through communication circuitry in the first communication link at operation 1315. In one embodiment, the response packet can be an ACK packet or a NACK packet.

The processor that has received response packets for audio packets may check the quality of the first communication link based on the received response packets in operation 1317. In one embodiment, the processor may transmit audio packets during an evaluation interval and determine the quality of the first communication link based on response packets received for audio packets transmitted during the evaluation interval. In one embodiment, the evaluation interval may include a set number of ISO_Intervals. The number of ISO_Intervals included in the evaluation interval may vary depending on the situation of the wireless communication network, and the evaluation interval may be implemented in a form that includes not only ISO_Intervals but also other types of time intervals. The evaluation section will be described in more detail below with reference to FIGS. 15A and 15B.

In one embodiment, the processor configures the moving average value, number of unacked packets during the evaluation interval, number of flushed packets during the evaluation interval, noise level, BLER, FER, BER, PER, RSSI, SINR, SNR, packet retransmission time, The quality of the first communication link can be confirmed based on at least one of the number of transmission packets per unit time or the retransmission rate. In Figure 13, for example, it is assumed that the moving average value is an EMA value, so the processor may check the quality of the first communication link based on the EMA value in operation 1317. The operation of the processor checking the quality of the first communication link based on the received response packets is similar to the operation of the processor checking the quality of the first communication link based on the received response packets described in operation 817 of FIG. 8. Alternatively, it may be implemented in substantially the same way, and therefore detailed description thereof will be omitted.

After confirming the quality of the first communication link, the processor may check whether the quality of the first communication link is equal to or higher than the threshold quality in operation 1319. For example, the processor may determine that the quality of the first communication link is above the threshold quality if the EMA value of the first communication link is below the threshold EMA value, or, conversely, if the EMA value of the first communication link exceeds the threshold EMA value. In this case, it can be confirmed that the quality of the first communication link is below the critical quality. In one embodiment, the threshold EMA value may be determined based on the size of the payload included in the audio packet. The size of a payload containing high-quality audio data (e.g., audio data above a threshold sound quality) may be larger than the size of a payload containing low-quality audio data (e.g., audio data below a threshold sound quality). For example, the threshold EMA value determined when the size of the payload included in the audio packet is greater than or equal to the threshold size may be different from the threshold EMA value determined when the size of the payload included in the audio packet is less than the threshold size. . For example, the critical EMA value determined when the size of the payload included in the audio packet is greater than or equal to the threshold size may be smaller than the critical EMA value determined when the size of the payload included in the audio packet is less than the threshold size. there is.

If the quality of the first communication link is above the threshold quality, the processor may return to operation 1313.

If the quality of the first communication link is below the threshold quality, the processor may perform a flush point adjustment operation on the first communication link in operation 1321. The flush point adjustment operation may be the operation of adjusting flush points for audio packets in a communication link of below threshold quality. For example, the flush point adjustment operation may be the operation of changing flush points for audio packets in a communication link below a threshold quality from default flush points to adjusted flush points.

In a typical wireless communication network, as described in Figure 11, audio data packets are given transmission opportunities determined based on FT and flush point, and therefore, if the quality of the communication link is below the threshold quality, communication below the threshold quality In a link, the first audio packet, which is the first audio packet transmitted among audio packets transmitted in a set time interval (e.g., at least one ISO_Interval), may be given most of the transmission opportunities among the transmission opportunities given for the set time interval. there is. This inequality in terms of transmission opportunities can ultimately lead to a decrease in service quality, and therefore the present disclosure provides a method for adjusting (e.g., changing) flush points for audio packets transmitted on a communication link below a threshold quality. Point adjustment operation can be provided. In this way, by adjusting the flush points for audio packets transmitted in a communication link below the critical quality, inequality in terms of transmission opportunities can be resolved, and thus quality of service can be improved.

In one embodiment, the processor may adjust flush points for audio packets transmitted on the first communication link based on the NSE and BN that are established for the first communication link. The method of adjusting flush points for audio packets may be similar to or substantially identical to the method for adjusting flush points for audio packets described in Table 1, and therefore detailed description thereof will be omitted. .

In one embodiment, when the processor adjusts the flush points for audio packets transmitted over the first communication link (e.g., adjusts the flush points for audio packets transmitted over the first communication link from a default flush point) (when changing to adjusted flush points), the first electronic device receives the sequence number of the received audio packet even though it does not receive separate information associated with the flush points for the audio packets adjusted by the processor. Based on SN), it is possible to check whether flush points for audio packets have been adjusted.

Alternatively, when the processor adjusts flush points for audio packets transmitted through the first communication link, the processor may inform the first electronic device about the adjusted flush points through the communication circuit. For example, the processor may generate a packet containing information associated with the adjusted flush points and transmit the generated packet to the first electronic device through a communication circuit. In this case, the first electronic device can confirm the adjusted flush points for audio packets transmitted through the first communication link based on information associated with the adjusted flush points included in the received packet, Audio packets may be received based on adjusted flush points for confirmed audio packets.

14 is a diagram illustrating another example of transmissions of audio packets in a wireless communication network according to one embodiment.

14, transmissions 1400 and 1405 of audio packets (e.g., Packet P0, Packet P1, Packet P2, Packet P3, Packet P4, Packet P5, Packet P6, Packet P7, Packet P8) are transmitted by the NSE. 6 (NSE = 6), FT is 5 (FT = 5), and BN is 2 (BN = 2). In FIG. 14, one ISO_Interval may include at least six sub-events, and the sub-events included in each of ISO_Interval (1411) to ISO_Interval (1417) may be the first to sixth sub-events in that order. You can. Transmissions 1400, 1405 of audio packets shown in FIG. 14 may be transmissions of audio packets in a communication link established between an audio source device and a first audio sink device. For example, the audio source device may be an external electronic device (e.g., the electronic device 101 of Figure 1, or the external electronic device 201 of Figures 2, 3, or 4), and the first audio sink device may be a first electronic device (e.g., the first electronic device 202 of FIG. 2 or FIG. 4), and the communication link may be a first communication link established between an external electronic device and the first electronic device.

As shown in Figure 14, in the case of NSE = 6, FT = 5, BN = 2, the default flush point for packet P0 may be located at the third subevent in the fifth ISO_Interval (1415), and the packet The default flush point for P1 may be located in the 6th sub-event of the 5th ISO_Interval 1415, and the default flush point for packet P2 may be located in the 3rd sub-event of the 6th ISO_Interval 1416, packet The default flush point for P3 may be located in the 6th sub-event of the 6th ISO_Interval 1416, and the default flush point for packet P4 may be located in the 3rd sub-event of the 7th ISO_Interval 1417, packet The default flush point for P5 may be located at the 6th sub-event of the 7th ISO_Interval (1417). In FIG. 14, the flush point for packet Pn is shown in the form of “Pn flush point,” where n may be an integer of 0 or more.

If the quality of the first communication link is less than a threshold quality (e.g., a first threshold quality or a second threshold quality) (e.g., if the quality of the first communication link is a second quality or a third quality), the first communication link Audio packets may not be transmitted or received normally through the link. In this case, the external electronic device may perform a packet drop operation to drop the corresponding audio packets. For example, if the quality of the first communication link is below the first threshold quality, the external electronic device sends packet P0, packet P1, packet P2, packet P3, packet P4, packet P5, packet P6, packet P7, and packet P8, respectively. The default flush points for packets P0, Packet P1, Packet P2, Packet P3, Packet P4, Packet P5, Packet P6, Packet P7, and Packet P8 transmitted on the first communication link may be maintained, but By dropping corresponding audio packets based on the drop rate and transmitting drop indication packets indicating the dropped audio packets, inequality in terms of transmission opportunities for audio packets transmitted through the first communication link can be resolved. .

Transmissions of audio packets, shown with reference numeral 1400, may be transmissions of audio packets when the packet drop ratio applied to the packet drop operation is 2:1. Transmissions of audio packets when the packet drop ratio is 2:1 may be implemented similarly or substantially identically to the transmissions of audio packets shown at 1000 in FIG. 10 .

For example, the external electronic device receives an ACK packet for packet P0 in the third sub-event of the first ISO_Interval (1411) and receives an ACK packet for packet P1 in the fifth sub-event of the third ISO_Interval (1413). can do. In FIG. 14, “ACK” may indicate that an ACK packet is received at that point in time. In Figure 14, it is assumed that the drop indication packet is implemented as an E packet. Receiving an ACK packet for a specific audio packet means that transmission of the specific audio packet was successful. Therefore, if the external electronic device successfully transmits two audio packets (e.g., packet P0 and packet P1), The audio packet (e.g., packet P2) immediately following the two successfully transmitted audio packets may be dropped.

The external electronic device that dropped packet P2 may transmit a drop instruction packet 1420 for packet P2 in the sixth sub-event of the third ISO_Interval 1413. The external electronic device may receive an ACK packet for the drop indication packet 1420 for packet P2 in the sixth sub-event of the third ISO_Interval 1413.

The external electronic device may receive an ACK packet for packet P3 in the second sub-event of the fifth ISO_Interval (1415) and may receive an ACK packet for packet P4 in the first sub-event of the sixth ISO_Interval (1416). If transmission of two audio packets (e.g., packet P3 and packet P4) is successful, the external electronic device may drop the audio packet (e.g., packet P5) immediately following the two successfully transmitted audio packets.

The external electronic device that dropped packet P5 may transmit a drop instruction packet 1430 for packet P5 in the second sub-event of the sixth ISO_Interval 1416. The external electronic device may receive an ACK packet for the drop indication packet 1430 for packet P5 in the second sub-event of the sixth ISO_Interval 1416.

The external electronic device may receive an ACK packet for packet P6 in the sixth sub-event of the sixth ISO_Interval (1416) and may receive an ACK packet for packet P7 in the fifth sub-event of the seventh ISO_Interval (1417). If transmission of two audio packets (e.g., packet P6 and packet P7) is successful, the external electronic device may drop the audio packet (e.g., packet P8) immediately following the two successfully transmitted audio packets.

The external electronic device that dropped packet P8 may transmit a drop instruction packet 1440 for packet P8 in the 6th sub-event of the 7th ISO_Interval 1417. The external electronic device may receive an ACK packet for the drop instruction packet 1440 for packet P8 in the 6th sub-event of the 7th ISO_Interval 1417.

Transmissions of audio packets, shown with reference numeral 1400, may be transmissions of audio packets when the packet drop ratio applied to the packet drop operation is 2:1 and the flush points for audio packets are not changed.

In contrast, transmissions of audio packets, shown with reference numeral 1405, have a packet drop ratio of 1:1 applied to the packet drop operation, and the flush points for the audio packets are also changed (e.g., flush point adjustment When an operation is performed), there may be transmissions of audio packets.

If the quality of the first communication link is less than a threshold quality (e.g., a first threshold quality or a second threshold quality) (e.g., if the quality of the first communication link is a second quality or a third quality), the first communication link Audio packets may not be transmitted or received normally through the link. In this case, in a general wireless communication network, an external electronic device can perform a packet retransmission operation up to default flush points set for audio packets. In contrast, in the present disclosure, when the quality of the first communication link is less than the second threshold quality, the external electronic device includes packet P0, packet P1, packet P2, packet P3, packet P4, packet P5, packet P6, Instead of maintaining the default flush points for each of packet P7 and packet P8, set new flush points for each of packet P0, packet P1, packet P2, packet P3, packet P4, packet P5, packet P6, packet P7, and packet P8. You can. The external electronic device changes the flush points of packet P0, packet P1, packet P2, packet P3, packet P4, packet P5, packet P6, packet P7, and packet P8 transmitted in the first communication link, and packet P0, packet P1, audio packets transmitted over the first communication link by transmitting a drop indication packet instructing to drop the audio packet before the changed flush points of packet P2, packet P3, packet P4, packet P5, packet P6, packet P7, and packet P8. It is possible to resolve the inequality in terms of transmission opportunities.

Transmissions of audio packets, shown with reference numeral 1405, may be transmissions of audio packets when the packet drop ratio applied to the packet drop operation is 1:1. Transmissions of audio packets when the packet drop ratio is 1:1 may be implemented similar or substantially identical to the transmissions of audio packets shown at 1005 in FIG. 10 .

For example, as shown in Figure 14, in the case of NSE = 6, FT = 5, BN = 2, the adjusted flush point for packet P0 is located at the third subevent in the fifth ISO_Interval (1415) Unlike the default flush point, which may be located in the 6th sub-event in the second ISO_Interval (1412), the adjusted flush point for packet P1 is located in the default flush point in the 6th sub-event in the 5th ISO_Interval (1415). Unlike the flush point, it may be located in the 6th sub-event in the 3rd ISO_Interval (1413), and the adjusted flush point for packet P2 is the default flush point located in the 3rd sub-event in the 6th ISO_Interval (1416). Alternatively, it may be located in the 6th sub-event of the 4th ISO_Interval (1414), and the adjusted flush point for packet P3 may be located in the 5th sub-event, unlike the default flush point that is located in the 6th sub-event of the 6th ISO_Interval (1416). It may be located at the 6th sub-event of the ISO_Interval (1415), and the adjusted flush point for packet P4 is at the 6th ISO_Interval (1416), unlike the default flush point which is located at the 3rd sub-event of the 7th ISO_Interval (1417). ), and the adjusted flush point for packet P5 may be the same as the default flush point, which is located in the sixth subevent of the seventh ISO_Interval (1417).

The external electronic device may receive an ACK packet for packet P0 in the sixth sub-event of the second ISO_Interval (1012). When transmission of one audio packet (e.g., packet P0) is successful, the external electronic device may drop the audio packet (e.g., packet P1) immediately following the successfully transmitted audio packet.

The external electronic device that dropped packet P1 may transmit a drop indication packet 1460 for packet P1 in the first sub-event of the third ISO_Interval 1413. The external electronic device may receive an ACK packet for the drop indication packet 1460 for packet P1 in the first sub-event of the third ISO_Interval 1413.

The external electronic device may receive an ACK packet for packet P2 in the sixth sub-event of the fourth ISO_Interval (1414). The external electronic device that receives the ACK packet for packet P2 may immediately drop the next audio packet (eg, packet P3).

The external electronic device that dropped packet P3 may transmit a drop indication packet 1470 for packet P3 in the first sub-event of the fifth ISO_Interval 1415. The external electronic device may receive an ACK packet for the drop indication packet 1470 for packet P3 in the second sub-event of the fifth ISO_Interval 1415.

The external electronic device may receive an ACK packet for packet P4 in the sixth sub-event of the sixth ISO_Interval (1416). The external electronic device that receives the ACK packet for packet P4 may immediately drop the next audio packet (e.g., packet P5).

The external electronic device that dropped packet P5 may transmit a drop instruction packet 1480 for packet P5 in the first sub-event of the 7th ISO_Interval 1417. The external electronic device may receive an ACK packet for the drop instruction packet 1480 for packet P5 in the first sub-event of the 7th ISO_Interval 1417.

FIG. 15A is a diagram illustrating an example of an operation for checking the quality of a communication link in a wireless communication network according to an embodiment.

Referring to FIG. 15A, one ISO_Interval may include at least six sub-events, and the sub-events included in each of ISO_Interval (1511) to ISO_Interval (1517) are the first to sixth sub-events in that order. It could be an event. The transmissions of audio packets shown in FIG. 15A may be transmissions of audio packets in a communication link established between an audio source device and a first audio sink device. For example, the audio source device may be an external electronic device (e.g., the electronic device 101 of Figure 1, or the external electronic device 201 of Figures 2, 3, or 4), and the first audio sink device may be a first electronic device (e.g., the first electronic device 202 of FIG. 2 or FIG. 4), and the communication link may be a first communication link established between an external electronic device and the first electronic device.

In one embodiment, the external electronic device may transmit audio packets during the evaluation period and check the quality of the first communication link based on response packets received for audio packets transmitted during the evaluation period. In one embodiment, the evaluation interval may include a set number of ISO_Intervals. The number of ISO_Intervals included in the evaluation interval may vary depending on the situation of the wireless communication network, and the evaluation interval may be implemented in a form that includes not only ISO_Intervals but also other types of time intervals.

In the present disclosure, the channel quality is measured by a moving average value, the number of unacked packets during the evaluation interval, the number of flushed packets during the evaluation interval, noise level, BLER, FER, BER, PER, RSSI, SINR, SNR, packet retransmission time, It may be expressed by at least one of the number of transmission packets per unit time or the retransmission rate.

For example, in Figure 15a, it is assumed that the channel quality is confirmed based on the EMA value, which is an example of a moving average value.

Figure 15a shows three evaluation sections (eg, a first evaluation section 1520, a second evaluation section 1530, and a third evaluation section 1540).

The first evaluation interval 1520 may include a first ISO_Interval (1511) and a second ISO_Interval (1512). The external electronic device performs transmission and retransmission operations for packet P0 in the first evaluation period 1520, but may not be able to receive the ACK packet for packet P0. The retransmission rate N for the first evaluation section 1520 may be 100% as a percentage.

The second evaluation interval 1530 may include a third ISO_Interval 1513 and a fourth ISO_Interval 1514. The external electronic device may perform transmission and retransmission operations for packet P1 and packet P2 in the second evaluation period 1530. The external electronic device may receive the ACK packet for packet P1 in the sixth sub-event at the third ISO_Interval (1513), and may receive the ACK packet for packet P2 in the sixth sub-event at the fourth ISO_Interval (1514). there is. The retransmission rate N for the second evaluation section 1530 may be 87.5% as a percentage.

The third evaluation interval 1540 may include the 5th ISO_Interval 1515 and the 6th ISO_Interval 1516. The external electronic device may perform transmission operations and retransmission operations for packet P3 and packet P8 in the third evaluation period 1540, and may perform transmission operations for packet P4, packet P5, packet P6, and packet P7. there is. The external electronic device may receive the ACK packet for packet P3 in the fifth sub-event at the fifth ISO_Interval (1515), and may receive the ACK packet for packet P4 in the sixth sub-event at the fifth ISO_Interval (1515). , an ACK packet for packet P5 may be received in a first subevent at a sixth ISO_Interval (1516), and an ACK packet for packet P6 may be received in a second subevent at a sixth ISO_Interval (1516), The ACK packet for packet P7 can be received in the third sub-event in the sixth ISO_Interval (1516). The retransmission rate N for the third evaluation section 1540 may be 43.75% as a percentage.

As another example, in Figure 15b, it is assumed that the channel quality is checked based on the number of unacked packets during the evaluation period or the number of flushed packets during the evaluation period.

FIG. 15B is a diagram illustrating another example of an operation for checking the quality of a communication link in a wireless communication network according to an embodiment.

Referring to FIG. 15b, one ISO_Interval may include at least six sub-events, and the sub-events included in each of ISO_Interval (1561) to ISO_Interval (1565) are the first to sixth sub-events in that order. It could be an event. The transmissions of audio packets shown in FIG. 15B may be transmissions of audio packets in a communication link established between an audio source device and a first audio sink device. For example, the audio source device may be an external electronic device (e.g., the electronic device 101 of Figure 1, or the external electronic device 201 of Figures 2, 3, or 4), and the first audio sink device may be a first electronic device (e.g., the first electronic device 202 of FIG. 2 or FIG. 4), and the communication link may be a first communication link established between an external electronic device and the first electronic device.

In one embodiment, the external electronic device may transmit audio packets during the evaluation period and check the quality of the first communication link based on the number of unacked packets during the evaluation period or the number of flushed packets during the evaluation period. In one embodiment, the evaluation interval may include a set number of ISO_Intervals. The number of ISO_Intervals included in the evaluation interval may vary depending on the situation of the wireless communication network, and the evaluation interval may be implemented in a form that includes not only ISO_Intervals but also other types of time intervals.

In the present disclosure, the channel quality is measured by a moving average value, the number of unacked packets during the evaluation interval, the number of flushed packets during the evaluation interval, noise level, BLER, FER, BER, PER, RSSI, SINR, SNR, packet retransmission time, It may be expressed by at least one of the number of transmission packets per unit time or the retransmission rate. For example, in Figure 15b, it is assumed that the channel quality is checked based on the number of unacked packets during the evaluation period or the number of flushed packets during the evaluation period.

Figure 15b shows three evaluation sections (eg, a first evaluation section 1570 and a second evaluation section 1580).

The first evaluation interval 1570 may include a first ISO_Interval (1561) and a second ISO_Interval (1562). The external electronic device performs transmission and retransmission operations for packet P0 in the first evaluation period 1570, but may not be able to receive the ACK packet for packet P0. Since there are no flush points in the first evaluation interval 1570, the number of flushed packets during the first evaluation interval 1570 may be 0. In contrast, since ACK packets for packet P0 were not received in the first evaluation period 1570, the number of unacked packets during the first evaluation period 1570 may be 1.

The second evaluation interval 1580 may include a third ISO_Interval (1563), a fourth ISO_Interval (1564), and a fifth ISO_Interval (1565). The external electronic device may perform transmission and retransmission operations for packets P0 to packets P5 in the second evaluation period 1580. During the second evaluation period 1580, the corresponding ACK packet is not received for each of packet P0, packet P2, packet P3, packet P4, and packet P5, so packet P0, packet P2, packet P3, packet P4, and packet P5 Each may be an unacked packet. In contrast, packet P1 is discarded without being transmitted during the second evaluation period 1580, so packet P1 may be a flushed packet.

As described in FIG. 15b, the external electronic device can check the number of unacked packets during a specific evaluation period or the number of flushed packets during a specific evaluation period. If the number of unacked packets during a specific evaluation period exceeds the critical number of unacked packets, the external electronic device may confirm that the quality of the corresponding communication link is less than the critical quality. Alternatively, the external electronic device may confirm that the quality of the corresponding communication link is less than the threshold quality when the number of flushed packets during a specific evaluation period exceeds the threshold number of flushed packets.

FIG. 16 is a flowchart illustrating another example of an operation process of an external electronic device in a wireless communication network according to an embodiment.

Referring to FIG. 16, in operation 1611, the processor (e.g., the electronic device 101 of FIG. 1, or the external electronic device 201 of FIG. 2, 3, or 4) of the external electronic device (e.g., the electronic device 101 of FIG. 1) The processor 120 or the processor 304 of FIG. 3) communicates with the first electronic device (e.g., the communication module 190 of FIG. 1 or the communication circuit 302 of FIG. 3) through a communication circuit (e.g., the communication module 190 of FIG. A communication link (eg, first communication link) may be established with the first electronic device 202 of 4). In FIG. 16, the case where the processor establishes a first communication link with the first electronic device is described as an example, but the processor communicates with the second electronic device (e.g., the second electronic device 204 in FIG. 2 or FIG. 4). A link (eg, a second communication link) may be set, and therefore operations 1613 to 1621 applied to the first communication link may also be applied to the second communication link. In one embodiment, operations 1613 to 1621 applied to the first communication link are the third electronic device established between the first electronic device and the second electronic device (e.g., the second electronic device 204 in FIG. 2 or FIG. 4). It can also be applied to communication links.

In one embodiment, the first communication link may be a CIS connection, and the operation of the processor establishing the first communication link is similar to the operation of the external electronic device establishing the first communication link described in operation 811 of FIG. 8, or They can be implemented substantially the same, and therefore detailed description thereof will be omitted.

In operation 1613, the processor that has established a first communication link with the first electronic device may transmit audio packets to the first electronic device through a communication circuit in the established first communication link.

The processor that transmitted the audio packets may receive response packets for the audio packets through communication circuitry in the first communication link at operation 1615. In one embodiment, the response packet can be an ACK packet or a NACK packet.

The processor that has received response packets for audio packets may check the quality of the first communication link based on the received response packets in operation 1617. In one embodiment, the processor may transmit audio packets during an evaluation interval and determine the quality of the first communication link based on response packets received for audio packets transmitted during the evaluation interval. In one embodiment, the evaluation interval may include a set number of ISO_Intervals. The number of ISO_Intervals included in the evaluation interval may vary depending on the situation of the wireless communication network, and the evaluation interval may be implemented in a form that includes not only ISO_Intervals but also other types of time intervals. The evaluation section may be similar to or implemented substantially the same as the evaluation section described in FIGS. 15A and 15B, and therefore detailed description thereof will be omitted.

In one embodiment, the processor transmits the first signal based on at least one of a moving average value, noise level, BLER, FER, BER, PER, RSSI, SINR, SNR, packet retransmission time, number of transmitted packets per unit time, or retransmission rate. 1 You can check the quality of the communication link. 16 , for example, it is assumed that the moving average value is an EMA value, so the processor may check the quality of the first communication link based on the EMA value in operation 1617. The operation of the processor checking the quality of the first communication link based on the received response packets is similar to the operation of the processor checking the quality of the first communication link based on the received response packets described in operation 817 of FIG. 8. Alternatively, it may be implemented in substantially the same way, and therefore detailed description thereof will be omitted.

After confirming the quality of the first communication link, the processor may check whether the quality of the first communication link is equal to or higher than the threshold quality in operation 1619. For example, the processor may determine that the quality of the first communication link is above the threshold quality if the EMA value of the first communication link is below the threshold EMA value, or, conversely, if the EMA value of the first communication link exceeds the threshold EMA value. In this case, it can be confirmed that the quality of the first communication link is below the critical quality. In one embodiment, the threshold EMA value may be determined based on the size of the payload included in the audio packet. The size of a payload containing high-quality audio data (e.g., audio data above a threshold sound quality) may be larger than the size of a payload containing low-quality audio data (e.g., audio data below a threshold sound quality). For example, the threshold EMA value determined when the size of the payload included in the audio packet is greater than or equal to the threshold size may be different from the threshold EMA value determined when the size of the payload included in the audio packet is less than the threshold size. . For example, the critical EMA value determined when the size of the payload included in the audio packet is greater than or equal to the threshold size may be smaller than the critical EMA value determined when the size of the payload included in the audio packet is less than the threshold size. there is.

If the quality of the first communication link is above the threshold quality, the processor may return to operation 1613.

If the quality of the first communication link is below the threshold quality, the processor may perform a packet drop operation and a flush point adjustment operation on the first communication link in operation 1621. The packet drop operation may be implemented similarly or substantially the same as the packet drop operation described in operation 821 of FIG. 8, and therefore detailed description thereof will be omitted. The flush point adjustment operation may be implemented similarly or substantially the same as the flush point adjustment operation described in operation 1321 of FIG. 13, and therefore detailed description thereof will be omitted.

According to one embodiment, a method of operating an electronic device (e.g., the electronic device 101 of FIG. 1 or the external electronic device 201 of FIGS. 2, 3, or 4) includes at least one external electronic device ( Example: It may include an operation of establishing a communication link with the first electronic device 202 of FIG. 2 or FIG. 4 or the second electronic device 204 of FIG. 2 or FIG. 4.

According to one embodiment, the operating method may further include checking the quality of the communication link.

According to one embodiment, the operating method may further include discarding at least one of packets to be transmitted during a set time period in the communication link based on the quality of the communication link being less than a threshold quality.

According to one embodiment, the operation method is performed using the at least one external electronic device (e.g., the first electronic device 202 of FIG. 2 or FIG. 4, or the second electronic device 204 of FIG. 2 or FIG. 4). The method may further include transmitting a packet indicating that the at least one packet is discarded.

According to one embodiment, the operating method further includes adjusting flush points, which are set points at which packets to be transmitted during the set time period are discarded, based on the quality of the communication link being less than a threshold quality. It can be included.

According to one embodiment, the operation of discarding at least one of the packets to be transmitted during a set time interval in the communication link includes discarding the at least one packet in a time domain at a point in time when the at least one packet is set to be discarded. It may include a discard operation at a point preceding the in-flush point.

According to one embodiment, the operation of checking the quality of the communication link includes the at least one external electronic device (e.g., FIG. 2 or FIG. 2) during another set time period preceding the set time period in the time domain. An operation of transmitting packets to the first electronic device 202 in Figure 4 or the second electronic device 204 in Figure 2 or Figure 4, and the at least one external electronic device (e.g., Figure 2) during the other set time interval. or receiving at least one response packet for packets transmitted during the other set time period from the first electronic device 202 in FIG. 4 or the second electronic device 204 in FIG. 2 or 4; and confirming the quality of the communication link based on the at least one response packet.

According to one embodiment, the operation of adjusting flush points, which are points in time at which packets to be transmitted during the set time interval are discarded, is included in each connected isochronous stream (CIS) event included in the set time interval. It may include adjusting flush points for packets to be transmitted during the set time interval based on the maximum number of sub-events and the number of new data packets that can be transmitted within the time interval in which the CIS event occurs.

According to one embodiment, each CIS event is transmitted between the electronic device (e.g., the electronic device 101 of FIG. 1, or the external electronic device 201 of FIG. 2, FIG. 3, or FIG. 4) and the at least one external An electronic device (eg, the first electronic device 202 in FIG. 2 or FIG. 4, or the second electronic device 204 in FIG. 2 or FIG. 4) may include an opportunity to exchange packets.

According to one embodiment, each of the sub-events occurs when the electronic device (e.g., the electronic device 101 of FIG. 1 or the external electronic device 201 of FIG. 2, FIG. 3, or FIG. 4) transmits a packet. And, the at least one external electronic device (e.g., the first electronic device 202 of FIG. 2 or FIG. 4, or the second electronic device 204 of FIG. 2 or FIG. 4) is connected to the electronic device (e.g., FIG. 1). It can be used to respond to the electronic device 101 of, or the external electronic device 201 of Figures 2, 3, or 4).

According to one embodiment, the operation of discarding at least one of the packets to be transmitted during the set time period in the communication link includes discarding at least one of the packets to be transmitted during the set time period based on a set discard ratio. It may include, and the set discard ratio indicates the number of acknowledgment (ACK) packets that are continuously received for a set number of packets among packets transmitted during the set time interval and that the at least one packet is discarded. It may include the ratio between packets.

According to one embodiment, the operating method includes using the at least one external electronic device (e.g., the first electronic device 202 of FIG. 2 or FIG. 4, or the second electronic device 204 of FIG. 2 or FIG. 4). The method may further include transmitting a packet containing information related to the adjusted flush points.

According to one embodiment, the packet indicating that the at least one packet is discarded may be an empty packet, a null packet, or a special packet.

According to one embodiment, a method of operating an electronic device (e.g., the first electronic device 202 of FIG. 2 or FIG. 4, or the second electronic device 204 of FIG. 2 or FIG. 4) includes using an external electronic device (e.g. : May include an operation of establishing a communication link with the electronic device 101 of FIG. 1 or the external electronic device 201 of FIG. 2, FIG. 3, or FIG. 4.

According to one embodiment, the operation method is set from the external electronic device (e.g., the electronic device 101 of Figure 1, or the external electronic device 201 of Figure 2, Figure 3, or Figure 4) in the communication link. The operation of receiving at least one packet during the time interval may further be included.

According to one embodiment, the operating method may further include checking whether the at least one received packet includes a packet indicating that the packet is discarded.

According to one embodiment, the operating method performs a recovery operation on the packet corresponding to the packet indicating that the packet is discarded, based on the fact that the received at least one packet includes a packet indicating that the packet is discarded. Additional operations to be performed may be included.

According to one embodiment, the at least one packet may be discarded in the time domain at a point in time preceding a flush point, which is a point in time at which the at least one packet is set to be discarded.

According to one embodiment, the at least one packet may be included in packets transmitted during the set time interval.

According to one embodiment, the at least one packet may be discarded during the set time interval based on a set discard rate.

According to one embodiment, the set discard rate is set at the set time by the external electronic device (e.g., the electronic device 101 of FIG. 1, or the external electronic device 201 of FIG. 2, FIG. 3, or FIG. 4). It may include a ratio between the number of acknowledgment (ACK) packets consecutively received for a set number of packets among packets transmitted during the interval and packets indicating that the packets are discarded.

According to one embodiment, a packet transmitted during the set time period by the external electronic device (e.g., the electronic device 101 of FIG. 1, or the external electronic device 201 of FIG. 2, FIG. 3, or FIG. 4) The flush points for these can be adjusted.

According to one embodiment, the flush points may be points at which packets transmitted during the set period are discarded.

According to one embodiment, the flush points are the maximum number of sub-events included in each connected isochronous stream (CIS) event included in the set time interval and the maximum number of sub-events that can be transmitted within the time interval in which the CIS event occurs. It can be adjusted based on the number of new data packets.

According to one embodiment, each CIS event is transmitted between the electronic device (e.g., the first electronic device 202 in FIG. 2 or FIG. 4, or the second electronic device 204 in FIG. 2 or FIG. 4) and the external electronic device. A device (e.g., the electronic device 101 of FIG. 1 or the external electronic device 201 of FIG. 2, FIG. 3, or FIG. 4) may include an opportunity to exchange packets.

According to one embodiment, each of the sub-events occurs when the external electronic device (e.g., the electronic device 101 of FIG. 1, or the external electronic device 201 of FIG. 2, FIG. 3, or FIG. 4) transmits a packet. And, the electronic device (e.g., the first electronic device 202 of FIG. 2 or FIG. 4, or the second electronic device 204 of FIG. 2 or FIG. 4) is connected to the external electronic device (e.g., the electronic device of FIG. 1). It can be used to respond to (101), or the external electronic device 201 of Figure 2, Figure 3, or Figure 4).

An electronic device and a method of operating the same according to an embodiment can stably provide a high-quality audio service even when the quality of at least one communication link among the communication links between electronic devices providing an audio service is below the critical quality. and thus service quality can be improved.

An electronic device and a method of operating the same according to an embodiment include, when the quality of at least one communication link among communication links between electronic devices providing an audio service is below a threshold quality, a packet drop operation is performed for the communication link below the threshold quality. By performing this, efficient transmission opportunities for audio packets can be provided, and thus quality of service can be improved.

An electronic device and a method of operating the same according to an embodiment include, when the quality of at least one communication link among communication links between electronic devices providing an audio service is below a threshold quality, a flush point adjustment operation for the communication link below the threshold quality. By performing, efficient transmission opportunities for audio packets can be provided, and thus quality of service can be improved.

Claims (20)

In the electronic device (101; 201),
communication circuit (190; 302); and
At least one processor (120; 304) operatively coupled to the communication circuitry, wherein the at least one processor:
Establishing a communication link with at least one external electronic device (202; 204) through the communication circuit,
verify the quality of said communication link;
discard at least one of the packets to be transmitted during a set time interval on the communication link based on the quality of the communication link being below a threshold quality, and
An electronic device configured to transmit, via the communication circuit, a packet indicating that the at least one packet is discarded to the at least one external electronic device.
According to paragraph 1,
The at least one processor:
The electronic device further configured to adjust flush points, which are set points of time at which packets to be transmitted during the set time period are discarded, based on the quality of the communication link being below a threshold quality.
According to claim 1 or 2,
The at least one processor:
An electronic device configured to discard the at least one packet at a time point preceding a flush point, which is a time point at which the at least one packet is set to be discarded, in a time domain.
According to any one of claims 1 to 3,
The at least one processor:
transmit packets to the at least one external electronic device through the communication circuit during another set time period preceding the set time period in a time domain;
Receiving, through the communication circuit, at least one response packet for packets transmitted during the different set time interval from the at least one external electronic device during the different set time interval, and
An electronic device configured to confirm quality of the communication link based on the at least one response packet.
According to paragraph 2,
The at least one processor:
The setting is based on the maximum number of sub-events included in each connected isochronous stream (CIS) event included in the setting time interval and the number of new data packets that can be transmitted within the time interval in which the CIS event occurs. configured to adjust flush points for packets to be transmitted during the time interval,
Each CIS event includes an opportunity for the electronic device and the at least one external electronic device to exchange packets, and
In each of the sub-events, the electronic device transmits a packet, and the at least one external electronic device is used to respond to the electronic device.
According to any one of claims 1 to 4,
The at least one processor:
configured to discard at least one of the packets to be transmitted during the set time interval based on a set discard rate, and
The set discard ratio is the ratio between the number of acknowledgment (ACK) packets continuously received for a set number of packets among packets to be transmitted during the set time interval and a packet indicating that the at least one packet is discarded. Including electronic devices.
According to paragraph 2,
The at least one processor:
The electronic device further configured to transmit, via the communication circuit, a packet containing information associated with the adjusted flush points to the at least one external electronic device.
According to any one of claims 1 to 4, and claim 6,
The electronic device wherein the packet indicating that the at least one packet is discarded is an empty packet, a null packet, or a special packet.
In the electronic device 202; 204,
communication circuit 420; and
At least one processor 410 operatively connected to the communication circuit, wherein the at least one processor comprises:
Establishing a communication link with an external electronic device (101; 201) through the communication circuit,
Receiving, through the communication circuit, at least one packet from the external electronic device in the communication link during a set time interval,
Check whether the received at least one packet includes a packet indicating that the packet is discarded, and
An electronic device configured to perform a recovery operation on a packet corresponding to a packet indicating that the packet is discarded, based on the fact that the at least one received packet includes a packet indicating that the packet is discarded.
According to clause 9,
An electronic device in which the at least one packet is discarded at a time prior to a flush point, which is a time point at which the at least one packet is set to be discarded in the time domain.
According to claim 9 or 10,
The at least one packet is included in packets transmitted during the set time period,
The at least one packet is discarded during the set time interval based on a set discard rate, and
The set discard rate is the number of acknowledgment (ACK) packets consecutively received for a set number of packets among packets transmitted during the set time interval by the external electronic device and a packet indicating that the packet is discarded. Electronic devices containing the ratio between liver.
According to clause 11,
Flush points for packets transmitted during the set time period are adjusted by the external electronic device,
The flush points are set points at which packets transmitted during the set period are discarded,
The flush points correspond to the maximum number of sub-events included in each connected isochronous stream (CIS) event included in the set time interval and the number of new data packets that can be transmitted within the time interval in which the CIS event occurs. It is adjusted based on
Each CIS event includes an opportunity for the electronic device and the external electronic device to exchange packets, and
Each of the sub-events is used for the external electronic device to transmit a packet and for the electronic device to respond to the external electronic device.
In a method of operating an electronic device (101; 201),
Establishing a communication link with at least one external electronic device (202; 204);
Checking the quality of the communication link;
discarding at least one of packets to be transmitted during a set time period in the communication link based on the quality of the communication link being below a threshold quality; and
A method of operating an electronic device, comprising transmitting a packet indicating that the at least one packet is discarded to the at least one external electronic device.
According to clause 13,
A method of operating an electronic device further comprising adjusting flush points, which are set points of time at which packets to be transmitted during the set time interval are discarded, based on the quality of the communication link being less than a threshold quality.
According to claim 13 or 14,
The operation of discarding at least one of packets to be transmitted during a set time period in the communication link is:
A method of operating an electronic device, including discarding the at least one packet at a time point preceding a flush point, which is a time point at which the at least one packet is set to be discarded, in a time domain.
According to any one of claims 13 to 15,
The operation of checking the quality of the communication link is:
transmitting packets to the at least one external electronic device during another set time period preceding the set time period in a time domain;
Receiving at least one response packet for packets transmitted during the different set time interval from the at least one external electronic device during the different set time interval; and
A method of operating an electronic device comprising checking the quality of the communication link based on the at least one response packet.
According to clause 14,
The operation of adjusting flush points, which are points at which packets to be transmitted during the set time period are discarded, is as follows:
The setting is based on the maximum number of sub-events included in each connected isochronous stream (CIS) event included in the setting time interval and the number of new data packets that can be transmitted within the time interval in which the CIS event occurs. An operation of adjusting flush points for packets to be transmitted during a time interval,
Each CIS event includes an opportunity for the electronic device and the at least one external electronic device to exchange packets, and
In each of the sub-events, the electronic device transmits a packet, and the at least one external electronic device is used to respond to the electronic device.
According to any one of claims 13 to 16,
The operation of discarding at least one of packets to be transmitted during a set time period in the communication link is:
An operation of discarding at least one of the packets to be transmitted during the set time interval based on a set discard ratio,
The set discard ratio is the ratio between the number of acknowledgment (ACK) packets consecutively received for a set number of packets among packets transmitted during the set time period and a packet indicating that the at least one packet is discarded. A method of operating an electronic device comprising:
According to clause 14,
A method of operating an electronic device further comprising transmitting a packet containing information related to the adjusted flush points to the at least one external electronic device.
The method according to any one of claims 13 to 16 and 18,
A method of operating an electronic device wherein the packet indicating that the at least one packet is discarded is an empty packet, a null packet, or a special packet.

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