KR-102961842-B1 - Broadcast discovery service method, device, computer program, and recording medium thereof in a wireless communication system

Abstract

The present disclosure relates to a method, apparatus, computer program, and a recording medium thereof for performing a broadcast discovery or scanning service in a wireless communication system. A method for performing scan offloading for a first device by a second device in a wireless communication system according to one embodiment of the present disclosure may include: transmitting information to the first device indicating that the second device is performing scanning on behalf of the first device; determining a target broadcast source for the first device by the second device; and transmitting information about the target broadcast source to the first device.

Inventors

• 이재호

Assignees

• 인텔렉추얼디스커버리 주식회사

Dates

Publication Date

20260507

Application Date

20200602

Priority Date

20190603

Claims (20)

1. In a broadcast audio scan service method performed by a client device in a wireless communication system, The step of the client device transmitting information indicating that the client device performs scanning on behalf of the server device to the server device, Herein, the server device supports one or more characteristics related to a broadcast audio scan service, and the client device accesses the one or more characteristics of the server device; The step of the client device obtaining broadcast reception status information of the server device from the server device, Here, the broadcast reception status information indicates the current synchronization status of the server device for each of one or more broadcast sources, and The above current synchronization state includes one or more of a periodic advertisement synchronization state or a broadcast isochronous stream synchronization state; and The method comprises the step of the client device transmitting information about a target broadcast source to the server device, wherein the client device requests the server device to synchronize with one or more of the periodic advertisements or the broadcast isochronous streams of the target broadcast source. Broadcast audio scan service method.
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4. In Article 1, Based on information regarding the target broadcast source, synchronization with the target broadcast source by the server device is performed. Broadcast audio scan service method.
5. In Article 1, The above target broadcast source is determined based on one or more of information about one or more broadcast sources obtained by the client device or broadcast reception status information of the server device. Broadcast audio scan service method.
6. In Article 5, The above one or more broadcast source information includes metadata transmitted through periodic advertisements of each of the above one or more broadcast sources, Broadcast audio scan service method.
7. In Article 1, Information regarding the target broadcast source includes one or more of synchronization-related information, address-related information, or metadata regarding the target broadcast source. Broadcast audio scan service method.
8. In Article 1, The above target broadcast source is determined based on a priority related to metadata or content types included in information about one or more broadcast sources acquired by the client device. Broadcast audio scan service method.
9. In Article 8, The priority related to the above metadata or content type is included in policy information set by one or more users of the server device or the client device, Broadcast audio scan service method.
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11. In a broadcast audio scan service method performed by a server device in a wireless communication system, The server device receives information from the client device indicating that the client device performs scanning on behalf of the server device, Herein, the server device supports one or more characteristics related to a broadcast audio scan service, and the client device accesses the one or more characteristics of the server device; The step of the server device providing broadcast reception status information of the server device to the client device, Here, the broadcast reception status information indicates the current synchronization status of the server device for each of one or more broadcast sources, and The above current synchronization state includes one or more of a periodic advertisement synchronization state or a broadcast isochronous stream synchronization state; and The method comprises the step of the server device receiving information about a target broadcast source from the client device, wherein the server device requests the target broadcast source to synchronize with one or more of the periodic advertisements or the broadcast isochronous streams of the target broadcast source. Broadcast audio scan service method.
12. In Article 11, Based on information regarding the target broadcast source, synchronization with the target broadcast source by the server device is performed. Broadcast audio scan service method.
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14. In Article 11, The above target broadcast source is determined based on one or more of information about one or more broadcast sources obtained by the client device or broadcast reception status information of the server device. Broadcast audio scan service method.
15. In Article 14, The above one or more broadcast source information includes metadata transmitted through periodic advertisements of each of the above one or more broadcast sources, Broadcast audio scan service method.
16. In Article 11, Information regarding the target broadcast source includes one or more of synchronization-related information, address-related information, or metadata regarding the target broadcast source. Broadcast audio scan service method.
17. In Article 11, The above target broadcast source is determined based on a priority related to metadata or content types included in information about one or more broadcast sources acquired by the client device. Broadcast audio scan service method.
18. In Article 17, The priority related to the above metadata or content type is included in policy information set by one or more users of the server device or the client device, Broadcast audio scan service method.
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20. In a client device that performs a broadcast audio scan service in a wireless communication system, Memory; Transmitter/receiver; and Includes a processor, The above processor is, Information indicating that the client device performs scanning on behalf of the server device is transmitted to the server device through the transceiver, and Herein, the server device supports one or more characteristics related to a broadcast audio scan service, and the client device accesses the one or more characteristics of the server device; Broadcast reception status information of the above server device is obtained from the above server device through the above transceiver, and Here, the broadcast reception status information indicates the current synchronization status of the server device for each of one or more broadcast sources, and The above current synchronization state includes one or more of a periodic advertisement synchronization state or a broadcast isochronous stream synchronization state; and Information about a target broadcast source, which requests the server device to synchronize with one or more of the periodic advertisements or broadcast isochronous streams of the target broadcast source, is configured to be transmitted to the server device through the transceiver. Client device.

Description

Broadcast discovery service method, device, computer program, and recording medium thereof in a wireless communication system The present disclosure relates to a broadcast discovery service in a wireless communication system, and specifically to a method, apparatus, computer program, and a recording medium thereof for a client to perform broadcast discovery for a server. Bluetooth is a short-range wireless communication standard that includes BR (Basic Rate)/EDR (Enhanced Data Rate) technology and LE (Low Energy) technology. BR/EDR, also known as Bluetooth Classic, includes BR technology applied since Bluetooth 1.0 and EDR technology applied since Bluetooth 2.0. Bluetooth LE (BLE), applied since Bluetooth 4.0, is a technology that supports the transmission and reception of relatively large amounts of data with low power consumption. The Bluetooth standard includes various profiles. For example, the Hands-Free Profile (HFP) defines the requirements for one device to function as an audio gateway (AG), such as a smartphone, and another device to function as a hands-free device, such as a headset. Additionally, the Advance Audio Distribution Profile (A2DP) defines the requirements for one device to function as an audio source, such as a music player, and another device to function as an audio sink, such as a speaker. With the recent increase in the adoption of wireless devices, there is a growing demand for audio data transmission and reception across various topologies, such as many-to-many or M-to-N connections. For example, streaming services requiring 5.1 channel environments are emerging, and discussions are underway to support 5.1 channel environments using multiple portable Bluetooth speakers, moving beyond the limitations of conventional dedicated 5.1 channel wired speakers. However, conventional Bluetooth audio technology was developed primarily considering use cases involving one-to-one connections between two devices; consequently, it is not suitable for supporting audio data transmission and reception between multiple devices and suffers from significant latency issues. Additionally, as the number of Bluetooth audio devices increases, problems such as increased power consumption for searching for nearby devices arise. In addition, to reduce power consumption for the device's search for nearby devices, it may be considered to have another device search, discover, or scan for nearby devices on behalf of the device. However, no specific measures have been provided for this. FIG. 1 is a drawing illustrating, exemplarily, a conventional audio connection type and an audio connection type to which the present disclosure is applicable. FIG. 2 is a diagram illustrating, by way of example, a conventional audio-related protocol stack and an audio-related protocol stack to which the present disclosure is applicable. FIG. 3 shows examples of 5.1 channel surround system hardware to which the present disclosure is applicable. FIG. 4 is a diagram illustrating an audio data encoding/decoding process to which the present disclosure is applicable. FIG. 5 is a diagram showing an example of channel allocation for two devices to which the present disclosure is applicable. FIG. 6 is a diagram illustrating the synchronization delay of two streams to which the present disclosure is applicable. FIG. 7 is a diagram illustrating a broadcast operation for a plurality of devices to which the present disclosure is applicable. FIGS. 8 and 9 are drawings for explaining the operation of ICL type and INCL type to which the present disclosure is applicable. FIG. 10 is a diagram showing a broadcast audio stream state machine to which the present disclosure is applicable. FIG. 11 is a diagram illustrating an audio setup procedure to which the present disclosure is applicable. FIG. 12 is a diagram showing a link hierarchy state machine to which the present disclosure is applicable. FIG. 13 is a drawing showing an example of an audio topology to which the present disclosure is applicable. FIGS. 14 to 16 are drawings illustrating the process of message exchange between a server and a client to which the present disclosure can be applied. FIG. 17 is a diagram showing a state machine for a call service to which the present disclosure is applicable. FIG. 18 is a diagram showing a layered packet format to which the present disclosure is applicable. FIG. 19 is a drawing showing examples of data unit formats to which the present disclosure is applicable. FIG. 20 is a drawing showing examples of advertising unit formats to which the present disclosure is applicable. FIG. 21 is a drawing for illustrating an example of a scan offloading method to which the present disclosure is applicable. FIG. 22 is a diagram illustrating an example of a broadcast source scanning service operation to which the present disclosure is applicable. FIG. 23 is a drawing illustrating an example of a client operation to which the present disclosure is applicable. FIG. 24