CN115103317B - Wireless communication method and assembly for audio sharing to destination device - Google Patents
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
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- H04W4/06—Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services
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- H—ELECTRICITY
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Abstract
The present application relates to a wireless communication method and assembly for audio sharing to a destination device. The destination device has a second communication module capable of receiving a broadcast, the wireless communication method comprising: setting at least two source devices such that each source device has a first communication module capable of broadcasting and the relative positions of each source device and the destination device are different; the audio data is time-shared and co-broadcast by the respective source devices to the destination device at broadcast time periods respectively corresponding to the respective source devices such that the destination device receives and plays the audio data using the second communication module. The source devices in the application continuously bear repeated retransmission of the broadcast audio data in a cooperative and non-mutual interference mode, so that the destination device can more reliably receive the same audio broadcast from a plurality of different wireless transmission paths, and the effect of sharing broadcast audio is improved.
Description
Technical Field
The present application relates to a wireless device and a wireless communication method for the wireless device, and more particularly, to a wireless communication method and an assembly for audio sharing to a destination device.
Background
Today's social life puts a demand for social sharing on audio playback. For example, one may desire to conveniently share his or her music to one or more other users.
The LE Audio is a new wireless communication mode, and its unique LE Audio broadcasting function enables Audio sharing experience. LE Audio enables a single Audio source device to broadcast one Audio stream to an unlimited number of bluetooth Audio sink devices by broadcasting Audio. Broadcast audio may join any range of audio receiving devices when on, and only allow the audio receiving device that entered the correct password to join when off. Therefore, LE Audio broadcast Audio realizes a powerful new use case, namely Audio sharing, which can be based on individuals and positions. With personal audio sharing, users will be able to share their bluetooth audio experience with surrounding people, e.g., music on smartphones with family, friends. Bluetooth audio can be shared in public places such as airports, bars, gymnasiums, movie theatres, conference centers and the like by means of position-based audio sharing, so that the use experience of visitors is improved.
To support Audio sharing, LE Audio introduces a synchronized broadcast group (Broadcast Isochronous Group, BIG) and a synchronized broadcast stream (Broadcast Isochronous Stream, BIS). Such devices are of two types: a synchronized broadcast device (Isochronous Broadcaster) and a synchronized receiving device (Synchronized Receiver), also referred to as a source device and a destination device.
The LE audio in the industry realizes audio sharing and consists of a source terminal device and a plurality of destination terminal devices. A synchronized broadcast group is created by the source device that contains one or more synchronized broadcast streams. In order to facilitate the joining of multiple destination devices to a synchronized broadcast group, a source device sends synchronized broadcast group information (BIGInfo) using periodic advertisement events (periodic ADVERTISING EVENT), and the multiple destination devices receive and play audio data. If the destination device cannot successfully and correctly receive the complete BIGInfo due to environmental interference, distance, blocking and the like, it cannot join the synchronous broadcast group, and thus cannot receive subsequent audio data. In addition, the source device retransmits the audio frames through LE audio broadcasting for multiple times, but if the destination device does not correctly receive the multiple retransmitted audio frames, the quality or performance of the audio played by the destination device is also affected, so that the listening experience of the user is affected.
Disclosure of Invention
The present application has been made to solve the above-mentioned problems occurring in the prior art.
There is a need for a wireless communication method and a wireless communication module for audio sharing to a destination device, which can successively take over multiple retransmissions of broadcast audio data by providing a plurality of source devices having different relative positions with respect to the destination device, and each source device cooperatively without interfering with each other, so that the destination device can more reliably receive the same audio broadcast from a plurality of different wireless transmission paths, improving the broadcast audio sharing effect.
According to a first aspect of the present application, a wireless communication method for audio sharing to a destination device is provided. The destination device has a second communication module capable of receiving a broadcast. The wireless communication method includes setting at least two source devices such that each source device has a first communication module capable of broadcasting and the relative positions of each source device and the destination device are different. Audio data is time-shared and co-broadcast by each source device to the destination device at broadcast time periods respectively corresponding to each source device, such that the destination device receives and plays the audio data using the second communication module.
According to a second aspect of the present application, a wireless communication assembly for audio sharing to a destination device is provided. The destination device has a second communication module capable of receiving a broadcast. The wireless communication assembly comprises at least two source devices, wherein each source device is provided with a first communication module capable of broadcasting, and the relative positions of the source devices and the destination devices are different. Audio data is time-shared and co-broadcast by each source device to the destination device at broadcast time periods respectively corresponding to each source device, such that the destination device receives and plays the audio data using the second communication module.
With the wireless communication method and the wireless communication module according to the respective embodiments of the present application, it is possible to provide a plurality of source devices that share audio broadcasting by providing the source devices such that the respective source devices like mirror images of each other, the remaining portions other than the signal radiating portion keep synchronous, cooperative operation with each other, and broadcast audio data is externally transmitted only in a time period allocated in advance thereto, and the broadcast data is not externally transmitted in other time periods, that is, the plurality of source devices afford multiple retransmissions of the broadcast audio data in a cooperative manner. Because the relative positions of the source device and the destination device are different, and the wireless transmission paths are also different, the audio sharing device can provide higher reliability than the audio broadcasting of a single source device, improve the audio receiving effect of the destination device and realize the higher-quality audio sharing function.
Drawings
In the drawings, which are not necessarily drawn to scale, like numerals may describe similar components in different views. The same reference numerals with letter suffixes or different letter suffixes may represent different instances of similar components. The accompanying drawings illustrate various embodiments by way of example in general and not by way of limitation, and together with the description and claims serve to explain the disclosed embodiments. Wherever possible, the same reference numbers will be used throughout the drawings to refer to the same or like parts. Such embodiments are illustrative and not intended to be exhaustive or exclusive of the present apparatus or method.
FIG. 1 is a schematic diagram of a wireless communication assembly and its associated device components for audio sharing to a destination device in accordance with an embodiment of the present application;
FIG. 2 (a) is a schematic diagram illustrating audio sharing by a wireless communication component to a destination device according to an embodiment of the present application;
FIG. 2 (b) shows a flow chart of a wireless communication method for audio sharing to a destination device according to an embodiment of the application;
fig. 3 is a diagram illustrating exemplary retransmission timing of a synchronous broadcast group (BIG), a synchronous broadcast stream (BIS), and a Payload Data Unit (PDU) of LE Audio broadcasting according to an embodiment of the present application;
Fig. 4 shows a schematic diagram of another exemplary PDU retransmission timing of LE Audio broadcasting according to an embodiment of the present application.
Detailed Description
The present application will be described in detail below with reference to the drawings and detailed description to enable those skilled in the art to better understand the technical scheme of the present application. Embodiments of the present application will be described in further detail below with reference to the drawings and specific examples, but not by way of limitation. The terms "first," "second," and "third" as used in this disclosure are merely intended to distinguish between corresponding features and do not necessarily represent such ordering, nor do they necessarily represent singular forms alone.
Fig. 1 is a schematic diagram of a wireless communication assembly and its associated device components for audio sharing to a destination device according to an embodiment of the present application. The wireless communication module 1 according to the embodiment of the present application is configured to perform audio sharing to a destination device, where the destination device may be a plurality of destination devices, such as the destination device 21 and the destination device 22 shown in fig. 1, until the destination device 2m, and the specific numerical values of m are not limited in the present application. The wireless communication assembly 1 may include at least two source devices, such as the source device 11 and the source device 12 shown in fig. 1. The present application is not limited to a specific number of source devices included in the wireless communication module 1 as long as it is more than two, for example, the wireless communication module 1 in fig. 1 includes n source devices in total from the source device 11 to the source device 1n, and the relative positions of the respective source devices and the destination device are different.
In some embodiments, each source device is configured to cooperatively broadcast audio data to the destination device in time-sharing fashion at broadcast time periods respectively corresponding to each source device such that the destination device receives and plays the audio data using the second communication module.
In some embodiments, the source devices may be communicatively connected (e.g., via a WIFI connection, a bluetooth connection, etc., specific connections not shown) in a wired or wireless manner to communicate information such as protocol configuration information, synchronization and control instruction information, audio data, error correction and detection packets thereof, etc., between each other, without limitation. In other embodiments, each source device may also enable coordinated audio broadcast sharing to the destination device by storing the same audio data or file. As shown in fig. 1, each source device has a first communication module capable of broadcasting, for example, the source device 11 has the first communication module 111 therein, the source device 12 has the first communication module 121 therein, the source device 1n has the first communication module 1n1 therein, and so on. Correspondingly, each destination device has a second communication module capable of receiving a broadcast performed by the first communication module, such as the second communication module 211 in the destination device 21, the second communication module 221 in the destination device 22, the second communication module 2m1 in the destination device 2m, and the like shown in fig. 1.
In some embodiments, the foregoing "broadcasting" includes, but is not limited to, LE Audio broadcasting, where in the case of performing LE Audio broadcasting, the first communication module includes an LE Audio module, and the second communication module also includes an LE Audio module, so that each source device performs LE Audio broadcasting sharing to each destination device through the LE Audio module therein.
It should be noted that, each source device shown in fig. 1 may be a customized device specifically configured to implement the wireless communication method and configuration according to the embodiments of the present application, or may be a device that performs protocol modification in a software and/or hardware adaptation manner for implementing the wireless communication method according to the embodiments of the present application based on an original device having an audio broadcasting function, such as a speaker, an intelligent device, or the like. In some embodiments, each destination device includes, but is not limited to, headphones, smart devices, speakers, etc., and the second communication module included therein only has a general-purpose, non-customized audio broadcast receiving function, without modifying software or hardware or performing additional configuration according to the number of source devices, the change of operation mode, etc. in the wireless communication assembly 1, so that the wireless communication assembly 1 configured in the above manner can provide the greatest convenience for the destination device and its user for receiving audio sharing. In other embodiments, each source device may be a speaker, an earphone, etc., and the wireless communication assembly 1 may be a group of speakers, an earphone, and may have other functions such as audio playing (e.g. a group of speakers or an earphone may perform multi-channel stereo playing, etc.), besides audio sharing, while the destination device may also have other functions such as receiving audio broadcasting, which is not limited herein. In addition, both the source device and the destination device support coexistence of different types of device modalities as long as they have corresponding audio sharing/audio broadcast receiving functions.
In the first communication module of each source device, there may also be a corresponding codec (not shown), and in the second communication module of each destination device, there may also be a corresponding codec (not shown). Taking LE Audio broadcasting as an example, when each source device performs Audio sharing, the codec in the first communication module may be used to encode Audio data in an encoding mode applicable to the LE Audio mode, for example, the encoding mode applicable to the LE Audio mode may include LC3/LC3+, etc., and then the encoded Audio data is subjected to Audio broadcasting in the LE Audio mode, and each destination device decodes and plays the LE Audio broadcasting data by using the codec (for example, LC3/LC3+ codec) in the second communication module.
Further, in some embodiments, the first communication modules of the respective source devices may perform exactly the same link layer configuration in order to enable the broadcast audio data streams of the respective source devices to remain exactly synchronized. Specifically, for example, the Audio data to be broadcasted may be carried in a payload in a wireless communication frame of the first communication module in each source device in a preset broadcast protocol including, but not limited to, an LE Audio broadcast protocol, where the payload is set to be repeatedly transmitted for a plurality of times. Further, each of the respective source devices broadcast-transmits the wireless communication frame containing the payload for the corresponding at least one broadcast period, and does not transmit the wireless communication frame outside the corresponding at least one broadcast period, so that the respective source devices successively broadcast the wireless communication frame containing the payload to the destination device for the broadcast periods respectively corresponding to the respective source devices while maintaining the link layer synchronization operation.
In some embodiments, the allocation of specific broadcast time periods for each source device may also be defined in a preset broadcast protocol, where each source device radiates radio frequency power only for the broadcast time period allocated thereto to broadcast a corresponding portion of the audio data, and does not radiate radio frequency power for other time periods.
When the preset broadcast protocol is the LE Audio broadcast protocol, a more specific configuration and operation of each source device will be described in detail below with reference to fig. 3 and 4.
In addition, note that various means of the present application, such as the first communication module (e.g., LE Audio module), codec, etc., may be implemented by an SOC (system on a chip), for example, various RISC (reduced instruction set computer) processors IP purchased from ARM company, etc., may be utilized as processors of the SOC to execute corresponding functions, and may be implemented as embedded systems. In particular, there are many modules on the commercially available modules (IP), such as, but not limited to, memory, various communication modules, codecs, buffers, and the like. Other devices such as an antenna and speaker may be external to the chip. Users can implement various communication modules, codecs, etc. by constructing ASICs (application specific integrated circuits) based on purchased IPs or self-developed modules in order to reduce power consumption and cost. For example, a user may also implement various communication modules, codecs, etc. using an FPGA (field programmable gate array), which may be used to verify the stability of a hardware design. For various communication modules, codecs, etc., a buffer is usually provided to temporarily store data generated during processing.
Fig. 2 (a) is a schematic diagram illustrating audio sharing by a wireless communication device to a destination device according to an embodiment of the present application. In fig. 2 (a), the source devices 11, 12, 1n, etc. in the wireless communication module 1 may be disposed at different positions so that the relative positions between the source devices and the destination devices such as the destination device 21, 22, 2m, etc. are different, which may enable the destination devices to have different wireless signal transmission paths when receiving audio broadcast data from different source devices, and may acquire audio data available for playback or of better quality through audio data retransmitted on other transmission paths when some of the transmission paths have poor signal quality, especially when they cannot receive signals correctly.
A wireless communication method for audio sharing to a destination device according to an embodiment of the present application is described in detail below.
Fig. 2 (b) shows a flowchart of a wireless communication method for audio sharing to a destination device according to an embodiment of the present application. The destination device has a second communication module capable of receiving a broadcast.
As shown in fig. 2 (b), at least two source devices may be provided such that each source device has a first communication module capable of broadcasting and the relative positions of each source device and the destination device are different in step S201.
In step S202, audio data is time-shared and co-broadcast by each source device to the destination device at broadcast time periods respectively corresponding to each source device, so that the destination device receives and plays the audio data using the second communication module.
Specifically, in order to realize that a plurality of source devices commonly assume Audio data broadcast that is originally implemented by one source device alone, it is necessary that each source device encodes Audio data to be broadcast in the same encoding manner, and cooperatively broadcasts the encoded Audio data to each destination device according to a preset broadcast protocol, for example, LE Audio broadcast protocol (including LE Audio protocol, such as LE ISOCHRONOUS in the bluetooth technology standard BT5.2, etc.).
Further, in some embodiments, the first communication modules of the respective source devices may perform exactly the same link layer configuration in order to enable the broadcast audio data streams of the respective source devices to remain exactly synchronized.
In other embodiments, the audio data to be broadcast may also be carried in the payload in the wireless communication frame of the first communication module in each source device according to a preset broadcast protocol as described above, where the payload is configured to be repeatedly transmitted multiple times. Specifically, each of the respective source devices broadcast-transmits a wireless communication frame containing the payload for a corresponding at least one broadcast period, and does not transmit the wireless communication frame outside the corresponding at least one broadcast period, so that the respective source devices broadcast the wireless communication frame containing the payload to the respective destination devices in time-sharing and in succession for the broadcast period respectively corresponding to the respective source devices while maintaining the link layer synchronization operation.
The configuration and sharing process required for the above-mentioned process Audio sharing will be described in detail with reference to the LE Audio mode Audio broadcasting.
Fig. 3 illustrates an exemplary retransmission timing of a synchronous broadcast group (BIG), a synchronous broadcast stream (BIS), and a Payload Data Unit (PDU) of LE Audio broadcasting according to an embodiment of the present application.
In some embodiments, the allocation manner of the PDUs in the BIS event may be set in the LE Audio broadcast protocol, so that the same PDU is transmitted multiple times (multiple transmissions of the PDU are collectively called PDU retransmissions, and the total number of transmissions is called retransmission number). As shown in fig. 3, in order to support Audio sharing, the LE Audio mode introduces a synchronous broadcast group (BIG) and a synchronous broadcast stream (BIS). The interval between two adjacent BIG events in time sequence is called BIG event interval, for example, the interval between BIG event x and BIG event x+1 shown in 301a and 301 b in fig. 3 is a BIG event interval (where x and x+1 are time sequence reference numerals, which may be omitted for convenience of description). One BIG event may include a plurality of BIS events, taking BIS event x as shown in 301 in FIG. 3 as an example, which includes BIS1 event x as shown in 302 and BIS2 event x as shown in 303 arranged in sequence, with the interval between adjacent BIS events being referred to as BIS interval. In each BIS event, a sub-event (hereinafter simply referred to as a sub-event or BIS sub-event) of a plurality of BIS events may be included, for example, BIS1 event x shown at 302 includes sub-event 3021, sub-event 3022, sub-event 3023 and sub-event 3024, and similarly BIS2 event x shown at 303 includes sub-event 3031, sub-event 3032, sub-event 3033 and sub-event 3034. BIS1 event x+1 shown in 302a and BIS2 event x+1 shown in 303a are also included in the next BIG event x+1 shown in 301a, and BIS1 event x+1 shown in 302a includes sub-event 3021a, sub-event 3022a, sub-event 3023a and sub-events 3024a, BIS2 event x+1 shown in 303a includes sub-event 3031a, sub-event 3032a, sub-event 3033a and sub-event 3034a. In addition, each BIS event may be followed by a control sub-event 304, which may be set as desired. It should be noted that the number of BIS events included in the BIG event, the number of sub-events included in the BIS event, whether each sub-event is followed by a control sub-event, and the specific content sent in the sub-event may be set as required on the premise of following the LE Audio protocol framework, which is not particularly limited in the present application.
In the arrangement of the BIG and BIS shown in fig. 3, the multiple BIS contained in each BIG can be used for transmission of audio data of different channels, for example, BIS1 is used for transmission of audio data of the left channel and BIS2 is used for transmission of audio data of the right channel. Wherein the audio data PDU is transmitted in sub-events included in each BIS event. In some embodiments, parameters such as BN (Burst Number), IRC (IMMEDIATE REPETITION COUNT, continuous repetition count), PTO (Pre-Transmission Offset ), NSE (Number of Subevents, number of sub-events) and the like may be set in the LE Audio broadcast protocol, so that the transmission mode of the PDU in the BIS event may be configured, for example, the same PDU may be transmitted multiple times in the same BIG and/or different BIG (multiple transmissions of the PDU are collectively called PDU retransmission times, and the total Number of transmission times is called retransmission times), so long as the destination device can correctly receive any one PDU retransmission, and analysis of Audio data may be completed.
In some embodiments, for example, it may be assumed that the number of retransmissions of the same PDU is Q (Q is a natural number greater than 1), and Q transmissions of the PDU may be set to be performed in time-sharing cooperation by the respective source devices. The specific PDU retransmission scheme may be set in association with the number of source devices and the number of retransmissions Q. Taking fig. 1 and fig. 2 (a) as an example, the number of source devices is n, and when n is equal to or greater than Q, it may be configured that at least Q source devices perform one transmission of the same PDU, respectively, so that each transmission of the same PDU is performed by a different source device, and each transmission of the same PDU may be performed via a different transmission path as much as possible. In case of n < Q, at least one transmission of the same PDU of the BIS may be allocated to each source device, and the remaining (Q-n) retransmissions may be allocated among the respective source devices according to a preset rule, e.g., the remaining PDU retransmissions may be equally allocated to the respective source devices as much as possible from the viewpoint of load balancing and/or power consumption balancing.
Still taking fig. 3 as an example, when bn=1, irc=4, pto=0, nse=4 are set in the LE Audio broadcasting protocol, and as described above, BIS1 is used to transmit left channel Audio data, BIS2 is used to transmit right channel Audio data, the number of retransmissions of the PDU is 4 (i.e., q=4), it can be seen that in BIG event x shown in 301, PDUs transmitted in sub-event 3021, sub-event 3022, sub-event 3023, and sub-event 3024 of BIS1 are p0 (left channel) retransmission frames, and PDUs transmitted in sub-event 3031, sub-event 3032, sub-event 3033, and sub-event 3034 of BIS2 are p0 (right channel) retransmission frames. Correspondingly, in the next BIG event x+1 shown in 301a, p1 (left channel) retransmission frames are sent in each of sub-event 3021a, sub-event 3022a, sub-event 3023a, and sub-event 3024a of BIS1, and p1 (right channel) retransmission frames are sent in each of sub-event 3031a, sub-event 3032a, sub-event 3033a, and sub-event 3034a of BIS 2.
Unlike the prior art that each PDU retransmission is sent by the same source device, the wireless communication method according to the embodiment of the present application may allocate each PDU retransmission to a different source device for sending, for example, may further allocate a corresponding broadcast time period to each source device in a preset broadcast protocol, so that each source device radiates radio frequency power to broadcast a corresponding portion of audio data in the allocated broadcast time period, and keeps normal operation of each functional portion such as a codec and a link layer protocol in other time periods, but does not radiate radio frequency power externally, for example, the setting of 0 of the transmission power may be implemented by control of a logic circuit or by switching a power amplifier, so that the power amplifier and the radio frequency circuit are turned off in a time period not allocated to the device, and the generation of undesired signal radiation is suppressed to cause interference to other broadcast data being sent. In this way, on one hand, the software and hardware implementation of the source devices is simplified, so that the cost of the devices can be reduced, on the other hand, because the larger power consumption of each source device is the power consumption of radio frequency transmission, each source device only bears the transmission of PDU retransmission frames in a part of time period instead of the whole time period, the power consumption of the source device is reduced, and only one source device in each time period is in a state (namely, the actual transmission state) that the radio frequency power is not 0, and the whole power consumption of the wireless communication component is not increased while mutual interference is not generated. In addition, since the encoding modes of the audio data by the respective source devices have been set to be identical and the link layer configuration concerning the PDU retransmission mode has been made identical for the first communication module in the respective source devices, the respective source devices are quite mirror images of each other in operation and perform the same audio data broadcasting in a time-sharing cooperative manner. The destination device does not distinguish the source of each PDU retransmission as if it received an audio broadcast from the same source device, so as long as it supports a general protocol such as LE audio protocol, and can receive audio broadcast sharing without any private configuration, and has wide applicability, such as any of the headphones, speakers, etc. supporting LE audio on the market.
Specifically, when corresponding broadcast periods are allocated to the respective source devices, the associated setting may be made according to the number of retransmissions of the PDU (assuming Q, Q being a natural number greater than 1) and the number of source devices (assuming n). Specifically, for example, when n+.q, it may be set such that each transmission of the same PDU is performed by a different source device, so that each transmission of the same PDU may be made via a different transmission path as much as possible. In case of n < Q, at least one transmission of the same PDU of the BIS may be allocated to each source device, and the remaining (Q-n) retransmissions may be allocated among the respective source devices according to a preset rule, e.g., the remaining PDU retransmissions may be equally allocated to the respective source devices as much as possible from the viewpoint of load balancing and/or power consumption balancing.
Taking fig. 3 as an example, the number of retransmissions of a PDU q=4, and thus, when the number of source devices is greater than 4, 4 source devices may be arbitrarily selected therefrom such that each PDU retransmission is via a different source device. For example, the source devices 1 to 4 are selected and allocated as: the source devices 1 to 4 respectively transmit broadcast data (i.e., radiate radio frequency power) at the first to fourth sub-events of each BIS event, i.e., in the BIS1 event x shown at 302, the sub-events 3021 to 3024 sequentially transmit p0 (left channel) retransmission frames from the source devices 1 to 4, and in the BIS2 event x shown at 303, the p0 (right channel) retransmission frames are again sequentially and sequentially transmitted from the source devices 1 to 4 in the sub-events 3031 to 3034. The period allocation in BIG event x+1 shown in 301a is identical to BIG event x shown in 301 and is not described here.
When the number of source devices is less than 4, for example, only 3 source devices, then after a period of one sub-event in the BIS is allocated to each source device, the remaining period of one sub-event may be allocated to any one of the 3 source devices. Or in other embodiments, for example, in the case that the operation processing capability and/or the waiting capability of each source device have significant differences, it may also be considered to allocate a larger number of PDU retransmissions to the source device having a stronger operation processing capability and/or waiting capability, so as to ensure that the power consumption of each source device in the wireless communication assembly is relatively balanced as much as possible, so that the wireless communication assembly as a whole has a longer running time.
Fig. 4 shows a schematic diagram of another exemplary PDU retransmission timing of LE Audio broadcasting according to an embodiment of the present application. In the PDU retransmission sequence shown in fig. 4, each gray bar is a graphical representation of a PDU retransmission frame. It can be seen that, since irc=3 and pto=2, the PDU retransmission frame to be transmitted in the 4 th sub-event is p2, and the PDU retransmission frame to be transmitted in the 5 th sub-event is p4 (the detailed calculation method is shown in fig. 3 and known to those skilled in the art with reference to LE Audio related art document), that is, the PDU retransmission frames in BIS are not completely transmitted sequentially. This has the advantage that when the channels of the source device and the destination device are bad for a short time, the interfered PDU retransmission frame may be correctly received by the destination device in a period of time when the other channels are good, but accordingly, this arrangement may cause an increase in the audio broadcasting delay, and in addition, the requirement of the source device for broadcasting transmission buffer may be greatly increased due to the need to buffer a plurality of PDU data. With the wireless communication method according to the present application, however, since channels between different source devices and destination devices can be regarded as being independent of each other in general, even if PDU pre-transmission is not set, the same effect as that of the PDU retransmission frame following the pre-transmission section shown in fig. 4 can be achieved. Thus, in the embodiment according to the present application, it is generally possible to set the PTO to 0 as shown in fig. 3, and set the IRC to a value matching the number of times of retransmission frames of a desired retransmission PDU, that is, it is not necessary to pre-transmit subsequent PDUs in each BIS, and in each BIG, the PDU retransmission frames of audio data are sequentially transmitted, so that the buffer capacity requirement for the source device to transmit can be greatly reduced, while the same effect as that of pre-transmitting part of subsequent PDU retransmission frames shown in fig. 3 can still be achieved, that is, in the case that the channel condition between a certain source device and a destination device is poor for a short time or the channel condition between a certain source device and a destination device is poor for a long time or even poor all the time, because at the same time, the channel condition between other source device and the destination device may be good, so that high quality and reliable audio sharing can still be accomplished.
According to the wireless communication method provided by the embodiment of the application, the audio broadcasting sharing to the destination device is completed by using a plurality of source devices instead of a single source device, and the wireless channels experienced by the audio broadcasting are different due to the difference of the relative positions between each source device and the destination device, so that the reliable sharing of the audio broadcasting can be ensured as long as paths with better channel quality exist in a plurality of transmission paths. Particularly, control information such as broadcast group synchronization information is sent through a plurality of source devices, so that the probability of a destination device joining a synchronous broadcast group can be improved, and the situation that the destination device cannot join the broadcast group due to poor signal quality in a long time due to environmental interference, distance, blocking and other reasons under the condition of a single channel can be effectively avoided.
Furthermore, for location-based audio sharing, multiple source devices can also perform more stable and reliable and higher quality audio sharing over a larger range than a single source device. Different source devices may be placed at a greater distance from each other, e.g., at different corners, etc., while destination devices may be present anywhere in these locations, for any destination device, it may be easier for one or more source devices closer to it, a closer distance meaning less radio frequency signal attenuation. On the other hand, for any destination device, when there are multiple source devices, it is easier to have one or more source devices that are not or less occluded from it, which also means less radio frequency signal attenuation, i.e., higher signal quality and audio sharing experience.
Furthermore, although exemplary embodiments have been described herein, the scope thereof includes any and all embodiments having equivalent elements, modifications, omissions, combinations (e.g., of the various embodiments across), adaptations or alterations as pertains to the present application. While several embodiments are described with respect to wireless communication methods and wireless communication components, respectively, it should be understood that the method details referred to in the description of the wireless communication components may be incorporated into the various embodiments of the wireless communication methods and vice versa.
The elements in the claims are to be construed broadly based on the language employed in the claims and are not limited to examples described in the present specification or during the practice of the application, which examples are to be construed as non-exclusive. It is intended, therefore, that the specification and examples be considered as exemplary only, with a true scope and spirit being indicated by the following claims and their full scope of equivalents.
The order of the various steps in the present application is exemplary only, and not limiting. The order of execution of the steps may be modified without affecting the practice of the application (without destroying the logical relationships between the steps required), and various embodiments resulting from the modification remain within the scope of the application.
The above description is intended to be illustrative and not restrictive. For example, the above-described examples (or one or more aspects thereof) may be used in combination with each other. For example, other embodiments may be used by those of ordinary skill in the art upon reading the above description. In addition, in the above detailed description, various features may be grouped together to streamline the application. This is not to be interpreted as an intention that the disclosed features not being claimed are essential to any claim. Rather, inventive subject matter may lie in less than all features of a particular disclosed embodiment. Thus, the following claims are hereby incorporated into the detailed description as examples or embodiments, with each claim standing on its own as a separate embodiment, and it is contemplated that these embodiments may be combined with one another in various combinations or permutations. The scope of the application should be determined with reference to the appended claims, along with the full scope of equivalents to which such claims are entitled.
Claims (12)
1. A wireless communication method for audio sharing to a destination device having a second communication module capable of receiving a broadcast, comprising:
Setting at least two source devices, wherein each source device is provided with a first communication module capable of broadcasting, and the relative positions of each source device and the destination device are different, the first communication module comprises an LE Audio module, the second communication module comprises an LE Audio module, and the broadcasting comprises LE Audio broadcasting;
Encoding the Audio data in the same encoding mode by each source device, and cooperatively broadcasting the encoded Audio data to the destination device in a time-sharing manner according to a preset broadcasting protocol in a broadcasting time period respectively corresponding to each source device, so that the destination device receives and plays the Audio data based on the LE Audio universal protocol by using the second communication module under the condition that the LE Audio universal protocol does not need to be privately configured; and
In a preset broadcast protocol, carrying the audio data to be broadcast on a payload in a wireless communication frame of the first communication module, wherein the payload is set to be repeatedly transmitted for a plurality of times;
The first communication module of each source device performs the same link layer configuration so that the broadcast audio data streams of each source device are synchronized, including: each of the respective source devices broadcast-transmits the wireless communication frame containing the payload for the corresponding at least one broadcast period, and does not transmit the wireless communication frame outside the corresponding at least one broadcast period, such that the respective source devices continuously broadcast the wireless communication frame containing the payload to the destination device in time-sharing fashion while maintaining the link layer synchronization operation for the broadcast periods respectively corresponding to the respective source devices.
2. The wireless communication method according to claim 1, wherein the predetermined broadcast protocol comprises LE Audio broadcast protocol.
3. The wireless communication method according to claim 2, wherein the audio data is transmitted in BIS, the wireless communication method further comprising:
Setting the distribution mode of PDU in BIS in the LE Audio broadcasting protocol, so that the same PDU is transmitted Q times;
Setting the Q times of transmission of the same PDU to be executed by the at least two source devices, so that at least one transmission of the same PDU of the BIS is executed by each source device under the condition that the number of the source devices is smaller than Q, and at least one transmission of the same PDU is executed by each Q source devices under the condition that the number of the source devices is larger than or equal to Q;
wherein Q is a natural number greater than 1.
4. The wireless communication method of claim 1, wherein the coding scheme comprises an LC3/LC3+ coding scheme.
5. The wireless communication method according to claim 1, wherein the preset broadcast protocol further defines an allocation of respective broadcast time periods for respective source devices;
the respective source device is further configured to: the respective source devices radiate radio frequency power for a broadcasting period allocated thereto to broadcast a corresponding portion of the audio data, and do not radiate radio frequency power for other periods.
6. The wireless communication method according to claim 1, wherein the respective source devices are communicably connected to each other in a wired or wireless manner.
7. A wireless communication assembly for Audio sharing to a destination device, the destination device having a second communication module capable of receiving a broadcast, the wireless communication assembly comprising at least two source devices, each source device having a first communication module capable of broadcasting, the first communication module having a codec and the relative positions of each source device and the destination device being different, wherein the first communication module comprises an LE Audio module, the second communication module comprises an LE Audio module, and the broadcast comprises an LE Audio broadcast;
each source device is configured to encode the Audio data in the same encoding mode by using the codec, and to cooperatively broadcast the encoded Audio data to the destination device in a time-sharing manner according to a preset broadcast protocol in a broadcast time period respectively corresponding to each source device, so that the destination device receives and plays the Audio data based on the LE Audio universal protocol by using the second communication module without private configuration of the LE Audio universal protocol; and
In a preset broadcast protocol, carrying the audio data to be broadcast on a payload in a wireless communication frame of the first communication module, wherein the payload is set to be repeatedly transmitted for a plurality of times;
The first communication module of each source device performs the same link layer configuration so that the broadcast audio data streams of each source device are synchronized, including: each of the respective source devices broadcast-transmits the wireless communication frame containing the payload for the corresponding at least one broadcast period, and does not transmit the wireless communication frame outside the corresponding at least one broadcast period, such that the respective source devices continuously broadcast the wireless communication frame containing the payload to the destination device in time-sharing fashion while maintaining the link layer synchronization operation for the broadcast periods respectively corresponding to the respective source devices.
8. The wireless communication assembly of claim 7, wherein the predetermined broadcast protocol comprises an LE Audio broadcast protocol.
9. The wireless communication module according to claim 8, wherein the Audio data is transmitted in BIS, and an allocation manner of PDUs in BIS is set in the LE Audio broadcasting protocol such that the same PDU is transmitted Q times;
the respective source device is further configured to: performing, by each of the respective source devices, at least one transmission of the same PDU of the BIS in case the number of source devices is less than Q, and performing, by at least Q source devices, one transmission of the same PDU, respectively, in case the number of source devices is greater than or equal to Q;
wherein Q is a natural number greater than 1.
10. The wireless communication assembly of claim 7, wherein the coding scheme comprises an LC3/LC3+ coding scheme.
11. The wireless communication assembly of claim 7, wherein the pre-set broadcast protocol further defines an allocation of respective broadcast time periods for respective source devices;
the respective source device is further configured to: radio frequency power is radiated during a broadcasting period allocated thereto to broadcast a corresponding portion of the audio data, and radio frequency power is not radiated during other periods.
12. The wireless communication assembly of claim 7, wherein the respective source device is further configured to: the respective source devices are communicably connected to each other in a wired or wireless manner.
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