CN110351669A

CN110351669A - Wireless broadcast transmission, receiving device and communication system

Info

Publication number: CN110351669A
Application number: CN201910571557.3A
Authority: CN
Inventors: 徐斌
Original assignee: Nanjing Sino Microelectronics Co Ltd
Current assignee: Nanjing Sino Microelectronics Co Ltd
Priority date: 2019-06-28
Filing date: 2019-06-28
Publication date: 2019-10-18
Anticipated expiration: 2039-06-28
Also published as: CN110351669B

Abstract

This application provides a kind of wireless broadcast transmission, receiving device and communication systems, comprising: wireless broadcast transmission equipment and wireless broadcast reception equipment broadcast interval and control room every period in communicated；The second period in the broadcast interval is used for transmission the data to be broadcast of wireless broadcast transmission device broadcasts；The control room is used for transmission the control sequence of wireless broadcast transmission equipment transmission every the first interior period, and control room is used for transmission the feedback information of wireless broadcast reception equipment transmission every the second interior period.Due to establishing information feedback channel and mechanism of information feedback in wireless broadcast communication system, allowing broadcast reception end by its local state information and controlling information notification broadcast transmitting terminal, and broadcast transmission end can be with these information of timely learning.

Description

Wireless broadcast transmitting and receiving equipment and communication system

Technical Field

The present application relates to the field of wireless broadcast technologies, and in particular, to a wireless broadcast transmitting and receiving device and a communication system.

Background

The rapid development of radio frequency wireless connection technologies such as Bluetooth and WiFi makes wireless audio sharing become a part of people's life. For example, a WiFi smart speaker centered on a router, and a bluetooth smart speaker or smart headset centered on a smart phone provide great convenience for people to share audio. In particular, point-to-multipoint radio broadcasting enables a multi-room audio sharing function. For example, the point-to-multipoint wireless audio broadcasting function is realized by using the Connectionless Slave Broadcasting (CSB) technology of the classic Bluetooth and the Bluetooth Low energy (BIS) broadcasting Isochronous Stream (broadcasting).

However, neither the CSB nor the BIS has a feedback channel or feedback mechanism from the broadcast receiving device to the broadcast transmitting device. The inventors have found that in technical implementations, the broadcast transmitting device cannot know the status information of the wireless broadcast receiving device nor receive and process the control information of the wireless broadcast receiving device due to the absence of a feedback mechanism. For example, a wireless broadcast transmitting device may only employ a fixed transmit power, a fixed number of retransmissions, and a fixed communication channel without knowing the state of the wireless broadcast receiving device as to interference or received signal quality. Thus, in some applications, unnecessary interference or electromagnetic pollution may result if maximum transmit power or maximum number of retransmissions is used. In other application environments, if a lower transmission power and a smaller number of retransmissions are used, the communication range is short or the communication quality is poor.

The prior art is not enough:

the existing point-to-multipoint wireless broadcast has no feedback mechanism, so that the broadcast transmitting equipment cannot know the state information of the wireless broadcast receiving equipment and cannot receive and process the control information of the wireless broadcast receiving equipment.

Disclosure of Invention

The embodiment of the application provides a wireless broadcast transmitting and receiving device and a communication system, so as to solve the technical problems in the prior art.

In a first aspect, the embodiment of the present application provides a wireless broadcast transmitting device, which communicates with a wireless broadcast receiving device during a period of a broadcast interval and a control interval; wherein the wireless broadcast transmitting equipment broadcasts and transmits data to be broadcast in a second time interval in the broadcast interval; and broadcasting and transmitting the control sequence in a first time period in the control interval, and receiving the feedback information transmitted by the wireless broadcast receiving equipment in a second time period in the control interval.

Optionally, the broadcast interval further includes a third time period, and the wireless broadcast transmitting device receives, in the third time period in the broadcast interval, the feedback information sent by the wireless broadcast receiving device.

Optionally, the second time period in the broadcast interval includes a broadcast anchor time period and a broadcast retransmission time period, and the third time period in the broadcast interval is located between the broadcast anchor time period and an adjacent broadcast retransmission time period or between two adjacent broadcast retransmission time periods.

Optionally, the wireless broadcast transmitting device further counts the number of active wireless broadcast receiving devices, and encapsulates the number of active wireless broadcast receiving devices in a control sequence; the number of the active wireless broadcast receiving devices is used for the wireless broadcast receiving devices to determine the time period and/or the minimum period for sending the feedback information.

Optionally, the feedback information includes signal strength, the wireless broadcast transmitting device reduces transmission power or reduces the number of broadcast retransmissions when receiving a signal strength higher than a preset high threshold but not receiving a signal strength lower than a preset low threshold, increases transmission power or increases the number of broadcast retransmissions when receiving a signal strength lower than the preset low threshold, and encapsulates the adjusted number of broadcast retransmissions into a control sequence to be transmitted to all wireless broadcast receiving devices; and/or the presence of a gas in the gas,

the feedback information comprises channel quality, and the wireless broadcast transmitting equipment selects a channel with the best channel quality as an effective channel according to the channel quality fed back by the wireless broadcast receiving equipment and encapsulates the effective channel in a control sequence; and/or the presence of a gas in the gas,

the feedback information comprises control information, and the wireless broadcast transmitting equipment receives the control information fed back by the wireless broadcast receiving equipment and executes corresponding control according to the control information; and/or the presence of a gas in the gas,

the feedback information comprises a serial number, and the wireless broadcast transmitting equipment deletes and filters repeated feedback information according to the serial number of the feedback information when receiving the feedback information fed back by the wireless broadcast receiving equipment.

Optionally, when there is a control conflict in receiving the control information fed back by the multiple wireless broadcast receiving devices, the wireless broadcast transmitting device performs corresponding control based on the latest control information according to the time of receiving the control information.

In a second aspect, the embodiment of the present application provides a wireless broadcast receiving device, which communicates with a wireless broadcast transmitting device during a period of a broadcast interval and a control interval; the wireless broadcast receiving equipment receives data to be broadcast which is broadcast and sent by the wireless broadcast transmitting equipment in a second time interval in the broadcast interval; and receiving a control sequence broadcast by the wireless broadcast transmitting equipment in a first time period in the control interval, and transmitting feedback information to the wireless broadcast transmitting equipment in a second time period in the control interval.

Optionally, the broadcast interval further includes a third time period, and the wireless broadcast receiving device sends feedback information to the wireless broadcast transmitting device in the third time period within the broadcast interval.

Optionally, the second time period within the broadcast interval includes a broadcast anchor time period and a broadcast retransmission time period; the third time interval in the broadcast interval is located between the broadcast anchor time interval and the adjacent broadcast retransmission time interval, or between two adjacent broadcast retransmission time intervals.

Optionally, the wireless broadcast receiving device determines a time period and/or a minimum period for sending the feedback information according to the number of active wireless broadcast receiving devices in the control sequence sent by the wireless broadcast transmitting device.

Optionally, when the number of the active wireless broadcast receiving devices is smaller than a first threshold, the wireless broadcast receiving devices only send feedback information in a second time period within the control interval; when the number of the active wireless broadcast receiving devices is larger than a first threshold value, the wireless broadcast receiving devices send feedback information in a second time period in the control interval and a third time period in the broadcast interval; and/or the presence of a gas in the gas,

when the number of the active wireless broadcast receiving devices is smaller than a second threshold value, the wireless broadcast receiving devices send feedback information once every N control intervals and/or broadcast intervals; when the number of the active wireless broadcast receiving devices is larger than a second threshold value, the wireless broadcast receiving devices send feedback information once every N + M control intervals and/or broadcast intervals; n and M are both positive integers.

Optionally, the feedback information comprises one or more of a sequence number, status information, and control information; wherein,

the status information comprises signal strength and/or channel quality;

the control information comprises control information and/or user control information generated by the wireless broadcast receiving equipment according to the state of the wireless broadcast receiving equipment.

Optionally, the wireless broadcast receiving device estimates a received signal strength when receiving data to be broadcast, and feeds back the signal strength by sending feedback information when the received signal strength is greater than a preset high threshold or lower than a preset low threshold.

In a third aspect, an embodiment of the present application provides a wireless broadcast communication system, including: a wireless broadcast transmitting device and one or more wireless broadcast receiving devices,

the wireless broadcast transmitting device and the wireless broadcast receiving device communicate within the period of a broadcast interval and a control interval; a second time interval in the broadcast interval is used for transmitting data to be broadcast broadcasted by the wireless broadcast transmitting equipment; the first time interval in the control interval is used for transmitting a control sequence broadcast by the wireless broadcast transmitting equipment, and the second time interval in the control interval is used for transmitting feedback information sent by the wireless broadcast receiving equipment.

Optionally, the broadcast interval further includes a third time period, and the third time period in the broadcast interval is used for transmitting feedback information sent by the wireless broadcast receiving device.

Optionally, the second time period within the broadcast interval includes a broadcast anchor time period and a broadcast retransmission time period; the third time interval in the broadcast interval is located between the broadcast anchor time interval and the adjacent broadcast retransmission time interval or between two adjacent broadcast retransmission time intervals.

Optionally, the control sequence includes the number of active wireless broadcast receiving devices, where the number of active wireless broadcast receiving devices is used to determine a period and/or a minimum period for the wireless broadcast receiving devices to send feedback information.

Optionally, the feedback information includes signal strength, and the wireless broadcast receiving device estimates received signal strength when receiving data to be broadcast, and feeds back the signal strength by sending the feedback information when the received signal strength is greater than a preset high threshold or lower than a preset low threshold; when the wireless broadcast transmitting equipment receives the signal intensity higher than the preset high threshold but does not receive the signal intensity lower than the preset low threshold, the transmitting power is reduced or the broadcast retransmission times are reduced, when the signal intensity lower than the preset low threshold is received, the transmitting power is increased or the broadcast retransmission times are increased, and the adjusted broadcast retransmission times are packaged into a control sequence to be transmitted to all wireless broadcast receiving equipment; and/or the presence of a gas in the gas,

the feedback information comprises channel quality, and the wireless broadcast receiving equipment detects the channel quality of a received signal when receiving data to be broadcast and feeds back the channel quality by sending the feedback information; the wireless broadcast transmitting equipment selects a channel with the best channel quality as an effective channel according to the channel quality fed back by the wireless broadcast receiving equipment and encapsulates the effective channel in a control sequence; and/or the presence of a gas in the gas,

The beneficial effects are as follows:

the device and the system provided by the embodiment of the application establish the information feedback channel and the information feedback mechanism, so that the broadcast receiving end can inform the broadcast transmitting end of the local state information and the control information of the broadcast receiving end, and the broadcast transmitting end can timely acquire the information.

Further, by adopting the device and the system provided by the embodiment of the application, the wireless broadcast transmitting device can know the state information of the received signal of the wireless broadcast receiving device, and in a short-distance application scene with a small number of wireless broadcast receiving devices, the wireless broadcast transmitting device can reduce the transmitting power and the retransmission times so as to reduce the interference to other wireless devices and the electromagnetic pollution to human bodies. Otherwise, the transmitting power and the retransmission times are increased to ensure the long-distance communication quality.

Drawings

Specific embodiments of the present application will be described below with reference to the accompanying drawings, in which:

fig. 1 is a schematic structural diagram of a wireless broadcast communication system in embodiment 1 of the present application;

fig. 2 is a schematic diagram illustrating a broadcast timeslot structure of a wireless broadcast transmitting device in embodiment 1 of the present application;

fig. 3 is a schematic diagram illustrating a timeslot structure of a control sequence and feedback information in embodiment 1 of the present application;

fig. 4 is a schematic diagram illustrating a broadcast timeslot structure of a wireless broadcast transmitting device in embodiment 2 of the present application;

fig. 5 is a schematic structural diagram of a wireless broadcast transmitting apparatus in embodiment 3 of the present application;

fig. 6 is a schematic structural diagram of a wireless broadcast receiving apparatus in embodiment 3 of the present application;

fig. 7 is a schematic view showing a scene of bluetooth audio broadcasting in embodiment 4 of the present application.

Detailed Description

In order to make the technical solutions and advantages of the present application more apparent, the following further detailed description of the exemplary embodiments of the present application with reference to the accompanying drawings makes it clear that the described embodiments are only a part of the embodiments of the present application, and not an exhaustive list of all embodiments. And the embodiments and features of the embodiments in the present description may be combined with each other without conflict.

In view of the defects of the prior art, the embodiments of the present application provide an information feedback method for point-to-multipoint wireless broadcasting, and a wireless broadcast transmitting device, a wireless broadcast receiving device and a wireless broadcast communication system using the information feedback method. The information feedback method comprises the steps of establishing an information feedback channel and an information feedback mechanism. The wireless broadcast receiving device transmits feedback information through a feedback channel, wherein the feedback information comprises state information and/or control information. The state information comprises information related to the communication state, such as signal strength, channel quality and the like, so that the wireless broadcast transmitting device can adjust the transmitting power and the retransmission times according to the state information. The control information comprises information related to the working states of the wireless broadcast transmitting device and/or the wireless broadcast receiving device, such as light effect switching, volume adjustment, program/track selection, play pause/continue control and the like, the information can be automatically generated by the equipment according to the working state of the equipment, or can be generated according to the control instruction input by the user through the user interface, so that the wireless broadcast transmitting device can conveniently adjust the local working state or control the working state of the whole wireless broadcast system according to the control information fed back by the wireless broadcast receiving equipment, for example, control of the last or next of an audio play, adjustment of the volume of an audio play, adjustment of the lighting effects of all devices of the wireless broadcast system, fast forward/playback/pause of the program/track play of the entire wireless broadcast system, etc. The following provides a detailed description of the design concept of the present invention by means of specific examples.

Example 1

Fig. 1 shows a schematic structural diagram of a wireless broadcast communication system in embodiment 1 of the present application.

As shown, the wireless broadcast communication system includes: one wireless broadcast transmitting apparatus 100, one or more wireless broadcast receiving apparatuses 200.

The wireless broadcast transmitting apparatus 100 and the wireless broadcast receiving apparatus 200 communicate within the period of the broadcast interval and the control interval; a first time interval in the broadcast interval is used for the wireless broadcast transmitting device 100 to acquire data to be broadcasted, and a second time interval in the broadcast interval is used for transmitting the data to be broadcasted by the wireless broadcast transmitting device 100; the first time interval in the control interval is used for transmitting the control sequence broadcast by the wireless broadcast transmitting device, and the second time interval in the control interval is used for transmitting the feedback information transmitted by the wireless broadcast receiving device 200.

The data to be broadcasted may be specific data such as audio data. For convenience of description, audio data will be taken as an example.

The control sequence may be encapsulated with necessary information provided by the wireless broadcast transmitting device to the wireless broadcast receiving device for broadcast data reception or synchronization, and/or information for the wireless broadcast transmitting device to implement operating state control on the wireless broadcast receiving device.

In one embodiment, the control interval is an integer multiple of the broadcast interval.

In the wireless broadcast communication, there may be a case where a plurality of wireless broadcast receiving apparatuses simultaneously feed back information to interfere with each other. According to the embodiment of the application, the time interval of the feedback information of the receiving equipment is adjusted by counting the number of the wireless broadcast receiving equipment within the effective distance range, so that the frequency of the wireless broadcast receiving equipment for sending the feedback information is reduced, and the interference is avoided. Specifically, the following method can be used.

In one embodiment, the minimum period for the wireless broadcast receiving device 200 to send the feedback information is determined according to the number of active wireless broadcast receiving devices 200 counted by the wireless broadcast transmitting device 100.

According to the embodiment of the application, after the wireless broadcast receiving equipment receives the control sequence sent by the wireless broadcast transmitting equipment, the minimum period and the frequency degree of sending the feedback information are determined according to the number of the active wireless broadcast receiving equipment sent by the wireless broadcast transmitting equipment in the control sequence. The more active wireless broadcast receiving devices, the larger the minimum period for each wireless broadcast receiving device to transmit feedback information, and the less frequent.

Specifically, the wireless broadcast transmitting device 100 counts the number of active wireless broadcast receiving devices 200, encapsulates the counted number in a control sequence, and transmits the control sequence to the wireless broadcast receiving devices 200, and the wireless broadcast receiving devices 200 determine the minimum period for transmitting feedback information according to the received number of active wireless broadcast receiving devices 200.

In one embodiment, when the number of the active wireless broadcast receiving devices is less than or equal to a second threshold, the wireless broadcast receiving devices send feedback information once every N control intervals; when the number of the active wireless broadcast receiving devices is larger than a second threshold value, the wireless broadcast receiving devices send feedback information once every N + M control intervals; wherein N and M are both positive integers.

In order to enable the wireless broadcast transmitting equipment to timely know the state information of the signals received by the wireless broadcast receiving equipment so as to be convenient for a short-distance application scene with a small number of wireless broadcast receiving equipment, the wireless broadcast transmitting equipment can reduce the transmitting power and the retransmission times so as to reduce the interference to other wireless equipment and the electromagnetic pollution to human bodies. Otherwise, the transmitting power and the retransmission times are increased to ensure the long-distance communication quality. The following can be used:

in one embodiment, the wireless broadcast receiving device estimates the received signal strength when receiving the data to be broadcast, and feeds back the signal strength by sending feedback information; the wireless broadcast transmitting device 100 receives the signal strength fed back by the wireless broadcast receiving device 200, reduces the transmitting power or reduces the number of broadcast retransmissions when receiving the signal strength higher than the preset high threshold but not receiving the signal strength lower than the preset low threshold, increases the transmitting power or increases the number of broadcast retransmissions when receiving the signal strength lower than the preset low threshold, and encapsulates the adjusted number of broadcast retransmissions into a control sequence to be transmitted to all wireless broadcast receiving devices.

In one embodiment, the wireless broadcast receiving device detects the channel quality of a received signal when receiving data to be broadcast, and feeds back the channel quality by sending feedback information; the wireless broadcast transmitting device receives the channel quality fed back by the plurality of wireless broadcast receiving devices, selects a channel with the best channel quality from the plurality of channels as an effective channel, and encapsulates the effective channel in a control sequence for broadcast transmission.

In one embodiment, the wireless broadcast receiving device further estimates a received signal strength when receiving the data to be broadcast, and feeds back the signal strength by sending feedback information when the received signal strength is greater than a preset high threshold or lower than a preset low threshold.

The inventor notices in the process of invention that:

the existing point-to-multipoint wireless broadcast system can not control the working states of other devices in the wireless broadcast system through wireless broadcast receiving devices, for example, music up-down switching, volume synchronization, light synchronization and the like of the devices in the whole broadcast communication system.

Therefore, the embodiments of the present application can also be implemented as follows.

In one embodiment, the wireless broadcast transmitting device receives control information fed back by the wireless broadcast receiving device, and performs corresponding control according to the control information to adjust the local working state. Such as switching the played audio, adjusting the volume of audio playing, adjusting the light effect, etc.

In one embodiment, the wireless broadcast transmitting device further generates a new control sequence including information for controlling the operating state of the wireless broadcast receiving device according to the control information included in the received feedback information, and broadcasts and transmits the new control sequence.

And the wireless broadcast receiving equipment controls the local working state according to the information for controlling the working state of the wireless broadcast receiving equipment, which is contained in the received control sequence.

Therefore, any one wireless broadcast receiving device in the system can achieve the purpose of controlling the working states of other wireless broadcast receiving devices and wireless broadcast transmitting devices in the system through the feedback control information.

For example, in a wireless broadcast communication system including a plurality of terminal devices such as mobile phones, tablet computers, desktop computers, wireless earphones, wireless speakers and the like, which play audio or video data synchronously, a user can arbitrarily operate one terminal device to input a control instruction, so that the audio and video synchronous playing or pause function of all devices in the system can be realized; or after one of the mobile phones receives the incoming call, the control information for pausing the playing or reducing the volume is automatically generated, so that the working states of all the devices in the system are synchronously adjusted.

For another example, in a wireless broadcast communication system including a plurality of wireless terminal devices having a light effect, a user can arbitrarily operate one terminal device, and thus, light linkage control of all devices in the system can be realized.

Fig. 2 is a schematic diagram illustrating a broadcast timeslot structure of a wireless broadcast transmitting device in embodiment 1 of the present application.

The radio broadcast transmitting apparatus 100 encodes audio data into equally spaced data frames and encapsulates fixed one or more frames of audio data into fixed length packets. The audio playing time corresponding to the fixed-length data packet corresponds to the broadcasting interval in the broadcasting time slot structure diagram of the wireless broadcasting transmitting apparatus 100 shown in fig. 2. The same audio data packet is transmitted multiple times in each broadcast interval.

As shown in fig. 2, in one broadcast interval, the solid-line TX boxes represent broadcast Anchor periods, and the dashed-line TX boxes represent broadcast retransmission periods. The broadcast Anchor time period and the broadcast retransmission time period are collectively called a broadcast time period (or called a second time period of a broadcast interval), and the wireless broadcast transmitting device wirelessly transmits data to be broadcast in the time period. The blank is other time periods (or called the first time period of the broadcast interval) for the wireless broadcast transmitting device to acquire the audio data to be broadcast.

In one embodiment, the broadcast anchor period and the broadcast retransmission period are equal in duration. The broadcast anchor period and the broadcast retransmission period may be consecutive periods.

Fig. 3 is a schematic diagram illustrating a timeslot structure of a control sequence and feedback information in embodiment 1 of the present application.

As shown in fig. 3, the Control Sequence (CS) contains necessary information for the wireless broadcast transmitting apparatus 100 to provide to the wireless broadcast receiving apparatus 200 for synchronization, necessary information for broadcast volume Control, necessary information for light Control, and the like. As shown in fig. 3, the control sequence is transmitted at regular time intervals, the solid line box CS represents a transmission period of the control sequence, and the dotted line box represents a transmission period of Feedback Information (FI) that may exist. Within a control interval, the control sequence transmits one or more sets at equal intervals.

The control interval is an integer multiple of the broadcast interval, for example: the control interval is twice, three times, etc. the above-mentioned broadcast interval. The control interval may be a minimum interval for the wireless broadcast transmitting device 100 to adjust local parameters such as synchronization information, volume control information, light information, etc. The wireless broadcast receiving device 200 may reply with the feedback information in the FI period after receiving the control sequence in the CS period.

The wireless broadcast communication method performed by the wireless broadcast receiving apparatus 200 includes,

1. the control sequence is searched for and synchronization information transmitted by the wireless broadcast transmitting apparatus 100 is obtained. The synchronization information includes: the sending channel and the control interval information of the control sequence are convenient for the wireless broadcast receiving equipment to keep synchronous with the wireless broadcast transmitting equipment continuously; the method can also comprise the following steps: the channel, the Anchor point, the broadcast interval, the retransmission times and the like for sending the audio data are convenient for the wireless broadcast receiving equipment to continuously receive the audio data.

2. And continuously receiving the control sequence sent by the wireless broadcast transmitting equipment according to the synchronization information. And adjusting local light or audio playing volume and the like according to the control information such as light, volume and the like contained in the control sequence.

3. And receiving broadcast audio data, demodulating and playing according to the synchronization information. In the process of receiving broadcast audio data, estimating the received signal strength, counting the error probability, and acquiring state information such as signal strength, channel quality and the like. And acquiring the control information according to the configuration of the wireless broadcast receiving equipment or the user interface. Generating feedback information based on the state information and/or the control information may specifically include: serial number, address of the wireless broadcast receiving device itself, signal strength of the received signal, channel quality, local volume adjustment, music track-up and track-down switching, light switching information, and the like. And determining the minimum cycle for sending the feedback information according to the number of the active wireless broadcast receiving devices contained in the control sequence, and sending the feedback information once or more times in a second time interval in the control interval.

The wireless broadcast communication method performed by the wireless broadcast transmitting device includes,

1. the control sequence is transmitted according to the time slot shown in fig. 3, and the feedback information transmitted by the wireless broadcast receiving device is received in the second period (FI in fig. 3) within the control interval.

2. Data to be broadcast (e.g., audio data) is transmitted according to the time slots shown in fig. 2.

3. And processing the received feedback information. Specifically, the method can comprise the following specific processing steps:

A. and adjusting local transmitting power or broadcast retransmission times according to the signal strength fed back by the wireless broadcast receiving equipment. If the signal strength higher than the preset high threshold is received and the signal strength lower than the preset low threshold is not received, the transmitting power is reduced or the broadcast retransmission times are reduced. And if the signal strength lower than the preset threshold is received, increasing the transmitting power or increasing the broadcast retransmission times.

B. And selecting the channel with the best overall signal quality as an effective channel according to the channel quality fed back by each wireless broadcast receiving device.

C. And counting the number of the active wireless broadcast receiving devices.

D. And filtering and processing control information fed back by the wireless broadcast receiving equipment, such as volume control, light control information and the like.

In the embodiment of the application, the wireless broadcast receiving device generates feedback information (the feedback information may include status information and control information) containing serial numbers, and the serial number of each piece of feedback information is different; the wireless broadcast receiving device may transmit the same feedback information multiple times at different feedback times to ensure that the wireless broadcast transmitting device receives the feedback information. When the wireless broadcast transmitting equipment receives the same feedback information which is transmitted by the wireless broadcast receiving equipment for multiple times, the repeated feedback information can be deleted and filtered according to the serial number.

Specifically, the control information may be processed and filtered according to the serial number of the fed back control information, and the repeated control information may be deleted and filtered.

In this embodiment, the processing is performed according to the time sequence of the received control information, and when there is a conflict between the control information fed back by the multiple wireless broadcast receiving devices, the processing is performed with the latest control information as the standard.

E. And adjusting the local working state according to the control information, for example, switching music according to music track-up and track-down switching information, and controlling playing and pausing according to playing pause information.

4. A new control sequence is generated and broadcast.

The wireless broadcast transmitting equipment also encapsulates the adjusted retransmission times, effective channels, the number of active wireless broadcast receiving equipment, control information and the like in a control sequence, and transmits the control sequence to all the wireless broadcast receiving equipment for synchronizing the effective channels, controlling the transmission interval of the feedback information, controlling the playing volume, controlling the lighting effect and the like.

Example 2

Fig. 4 shows a broadcast timeslot structure diagram of a wireless broadcast transmitting device in embodiment 2 of the present application.

The main difference between the embodiment of the present application and embodiment 1 is that a period for receiving feedback information transmitted by the wireless broadcast receiving device 200 is increased within the broadcast interval.

In one embodiment, the broadcast interval further includes a third time period, and the third time period in the broadcast interval is used for receiving feedback information transmitted by the wireless broadcast receiving device.

In order to further solve the problem that the feedback information is not effectively received when the wireless broadcast receiving equipment is in a large number, the third time period in the broadcast interval is increased to transmit the feedback information of the wireless broadcast receiving equipment, so that the feedback information sent by the wireless broadcast receiving equipment can be transmitted in the second time period in the control interval and the third time period in the broadcast interval, and the times of transmitting the feedback information are increased.

The wireless broadcast transmitting device 100 may receive the feedback information transmitted by the wireless broadcast receiving device 200 over a third period within the broadcast interval.

In one embodiment, the wireless broadcast transmitting device counts the number of active wireless broadcast receiving devices and encapsulates the number of active wireless broadcast receiving devices in a control sequence; and the wireless broadcast receiving equipment determines the time period for sending the feedback information according to the number of the active wireless broadcast receiving equipment.

In a specific embodiment, when the number of the active wireless broadcast receiving devices is less than or equal to a first threshold, the wireless broadcast receiving devices only send feedback information in a second time period within the control interval; and when the number of the active wireless broadcast receiving devices is larger than a first threshold value, the wireless broadcast receiving devices send feedback information in a second time period in the control interval and a third time period in the broadcast interval.

In another specific embodiment, when the number of the active wireless broadcast receiving devices is less than or equal to a second threshold, the wireless broadcast receiving devices send feedback information once every N control intervals and/or broadcast intervals; when the number of the active wireless broadcast receiving devices is larger than a second threshold value, the wireless broadcast receiving devices send feedback information once every N + M control intervals and/or broadcast intervals; wherein N and M are both positive integers.

In one embodiment, the third time period within the broadcast interval is located between the broadcast anchor time period and an adjacent broadcast retransmission time period, or between two adjacent broadcast retransmission time periods.

As shown in fig. 4, in one broadcast interval, the solid-line TX box represents a broadcast Anchor period, the thin-dashed TX box represents a broadcast retransmission period, and the thick-dashed RX box represents a receiving time slot (which may be referred to as a third period in the broadcast interval) for the wireless broadcast receiving device 200 to receive the broadcast packet and then transmit the feedback information. The broadcast Anchor period and the broadcast retransmit period are collectively referred to as a broadcast period (which may be referred to as a second period within a broadcast interval). The blank time period may include a first time period within the broadcast interval for the wireless broadcast transmitting device to acquire audio data.

1. the control sequence is searched for and synchronization information transmitted by the wireless broadcast transmitting apparatus 100 is obtained.

3. And receiving broadcast audio data, demodulating and playing according to the synchronization information. And generates feedback information based on the state information and/or the control information in the course of receiving the broadcast audio data. And determining the time period and the minimum cycle for sending the feedback information according to the number of the active wireless broadcast receiving devices contained in the control sequence, and sending the feedback information once or more times in the second time period and/or the third time period of the broadcast interval in the control interval.

The same parts of the above method as those of embodiment 1 will not be described again.

2. The audio data is transmitted according to the time slot shown in fig. 4, and the feedback information transmitted by the wireless broadcast receiving apparatus is received.

The wireless broadcast receiving device may choose to transmit the feedback information in the FI slot shown in fig. 3, or may choose to transmit the feedback information in the RX slot shown in fig. 4. If the wireless broadcast receiving device has sent the feedback information a in the FI timeslot shown in fig. 3 and sent the feedback information a in the RX timeslot shown in fig. 4, the wireless broadcast transmitting device receives the two same feedback information a, may filter out one of the feedback information a according to the identifier such as the sequence number, and reserves the other feedback information a.

3. And processing the received feedback information.

4. A new control sequence is generated and broadcast.

For example, the volume of the audio playing of the wireless broadcast communication system may be adjusted, increased or decreased via a user interface of a wireless broadcast receiving device, such as a touch button. The volume adjustment information is encapsulated in feedback information and sent to the wireless broadcast transmitting device in the FI slot as shown in fig. 3. After the wireless broadcast transmitting equipment receives the volume adjustment information, the wireless broadcast transmitting equipment adjusts the volume of local audio playing and transmits the adjusted volume to all wireless broadcast receiving equipment through a control sequence, so that the volume synchronization of all audio equipment of the wireless broadcast communication system is realized.

Taking the light effect control as an example, the light effect of the wireless broadcast communication system can adjust the light mode preferred by the user through a user interface of a certain wireless broadcast receiving device, such as touching a key or shaking a motion. The light patterns are encapsulated in feedback information and transmitted to the wireless broadcast transmitting device in the FI time slot as shown in fig. 3. After the wireless broadcast transmitting equipment receives the light mode switching information, the local light mode is adjusted, and the adjusted light mode is sent to all wireless broadcast receiving equipment through the control sequence, so that the light mode synchronization of all audio equipment of the wireless broadcast communication system is realized.

The wireless broadcast communication system provided by the embodiment of the present application may be used for audio broadcasting, and may also be used for other wireless data broadcasting or wireless control systems, which is not limited in the present application.

Example 3

The embodiments of the present application take audio broadcasting as an example for detailed description.

The data to be broadcast sent by the wireless broadcast transmitting equipment is audio data which is acquired and encoded through a wireless, wired or local storage unit.

Fig. 5 shows a schematic structural diagram of a wireless broadcast transmitting apparatus in embodiment 3 of the present application.

As shown, the wireless broadcast transmitting apparatus includes: an antenna, a radio frequency transceiver, a baseband data and protocol processor, an audio source interface, and a user interface.

The wireless broadcast transmitting device acquires audio data through the audio source interface during a first period of a broadcast interval. The sound source interface can be a USB interface, an SD card, a wireless connection and the like.

The audio data is encoded into a data frame structure and code rate suitable for wireless broadcast by an audio processor and then is sent to a baseband data and protocol processor; the baseband data and protocol modem encapsulates the audio data frames into a data format suitable for wireless broadcast, modulates the data frames into a radio frequency signal by the radio frequency transceiver, and broadcasts the radio frequency signal to the wireless broadcast receiving device through the antenna in a second time period within the broadcast interval.

The wireless broadcast transmitting equipment receives a radio frequency signal of feedback information sent by the wireless broadcast receiving equipment through an antenna in a second time period in a control interval or a third time period in the broadcast interval, the radio frequency signal is demodulated into a baseband signal through a radio frequency transceiver, and the baseband signal is analyzed into the feedback information through a baseband data and protocol processor, wherein the feedback information comprises feedback state information or control information. The wireless broadcast transmitting device performs local relevant state control according to the state information or control information fed back by the wireless broadcast receiving device, for example: adjustment of transmitting power and broadcast retransmission times, local volume and light control and the like.

The wireless broadcast transmitting equipment can also comprehensively process the state information or the control information fed back by the wireless broadcast receiving equipment through the user interface, the sound source interface and the protocol processor as the control information of the wireless broadcast receiving equipment, encapsulate the control information into a control sequence, modulate the control information into a radio frequency signal through the radio frequency transmitter, and transmit the radio frequency signal to the wireless broadcast receiving equipment through the antenna in a first period in a control interval. The control information includes time and frequency synchronization information, volume synchronization information, light synchronization information, channel information, and the like. The user interface can be a key, a touch screen, a wireless control interface and the like.

Fig. 6 is a schematic structural diagram of a wireless broadcast receiving apparatus in embodiment 3 of the present application.

As shown in the drawing, the wireless broadcast receiving apparatus includes: an antenna, a radio frequency transceiver, a baseband data and protocol processor, an audio processor, and a user interface.

The wireless broadcast receiving equipment receives a control sequence sent by the wireless broadcast transmitting equipment through an antenna in a first time period in a control interval, receives a radio frequency signal of audio data sent by the wireless broadcast transmitting equipment in a second time period in the broadcast interval, demodulates the radio frequency signal into corresponding baseband data through a radio frequency transceiver, then recovers the control information and the audio data through the baseband data and a protocol processor, and sends the audio data to an audio processor for further processing and playing. Wherein the audio data further processing comprises packet loss compensation.

The wireless broadcast receiving device transmits status information such as: the signal strength or channel quality of the received signal, and control information acquired through the user interface, such as: and the volume adjustment, the light adjustment and the like are packaged into feedback information, the feedback information is modulated into a radio frequency signal through a radio frequency transceiver, and the radio frequency signal is sent to the wireless broadcast transmitting equipment through an antenna in a second time period in a control interval or a third time period in a broadcast interval.

Example 4

For the convenience of the application, bluetooth audio broadcasting is used as an example for the following description.

As shown in the figure, the wireless broadcast communication system in the embodiment of the present application includes one bluetooth wireless broadcast transmitting device and a plurality of bluetooth wireless broadcast receiving devices. The Bluetooth wireless broadcast transmitting equipment comprises a Bluetooth antenna, a Bluetooth radio frequency transceiver, a Bluetooth baseband data and protocol processor, a Bluetooth audio processor, a sound source interface and a user interface.

In this embodiment, when the bluetooth wireless broadcast transmitting device acquires the audio data to be broadcast, the audio data may be transmitted through a wireless communication protocol of a non-bluetooth standard such as WIFI or a cellular network, or may be transmitted through a wired communication protocol such as an internet or a local network, or may be locally transmitted through a data bus protocol such as a USB interface or an SD interface. Under different transmission protocols, the audio source interface can be implemented as an audio source data transmission module supporting different protocols.

When the Bluetooth wireless broadcast transmitting equipment acquires audio data to be broadcast from Bluetooth equipment such as a smart phone based on a Bluetooth protocol, the function of the sound source interface is realized by time-sharing multiplexing the Bluetooth modules such as the Bluetooth antenna, the Bluetooth radio frequency transceiver, the Bluetooth baseband data and protocol processor, the Bluetooth audio processor and the user interface, namely, the Bluetooth antenna, the Bluetooth radio frequency transceiver, the Bluetooth baseband data and protocol processor, the Bluetooth audio processor and the user interface are time-sharing multiplexed, so that the function of acquiring the audio data to be broadcast by wireless broadcast function and Bluetooth connection is realized.

The audio processor realizes the functions of audio coding, audio decoding, packet loss compensation and the like.

The broadcast interval of the wireless broadcast transmitting device is 30ms, and in the same broadcast interval, the time is divided into equally spaced time intervals, specifically, each broadcast interval is divided into 48slots (slots) of 625us in length according to the bluetooth timeslot definition mode.

Wherein 12slots or 7.5ms is a broadcast period, and in addition 36slots or 22.5ms is used for: (1) capture audio data, or (2) send control sequences, or (3) other functions.

(1) After the wireless broadcast transmitting equipment acquires audio data through Bluetooth connection, the audio data is recoded by an audio processor by adopting an Opus coding method, the coding rate is 100kbps, the coding frame length is 10ms, each frame is 125bytes, and every three coding frames form a data packet which is 375bytes in total. When the wireless broadcasting is carried out, the classical Bluetooth 2DH3 packet type broadcasting with the extended length is adopted, each 2DH3 packet occupies 4slots (wherein 3 slots transmit data, and 1 slot is a receiving slot), and the length of the load data is 375 bytes. The 2DH3 packet is repeatedly transmitted 1-4 times (default configuration is 3 times) and may be received 1-4 times, occupying 4-16slots (default configuration is 12slots) in each broadcast interval.

The wireless broadcast transmitting equipment packages the coded audio data frame into a digital signal of a 2DH3 packet through a Bluetooth baseband data and protocol processor and sends the digital signal to a Bluetooth radio frequency transceiver, and a channel of the radio frequency transceiver is set according to a Bluetooth frequency hopping mode. The radio frequency transceiver modulates the digital signal into a radio frequency signal on a preset channel and transmits the radio frequency signal to the wireless broadcast receiving equipment through an antenna.

(2) In this embodiment, the Control Sequence (CS) includes an address, a clock, a channel map, a broadcast interval, the number of times of broadcast transmission in a broadcast interval (which may include the number of broadcast anchor points and broadcast retransmissions), a broadcast start time point, volume Control information, and lighting Control information of the wireless broadcast receiving device. The volume control information includes: the interval of the broadcast volume, the reference point, the volume control enable signal, the volume value, etc. are adjusted.

In the present embodiment, three control sequences within one control interval are transmitted using 2DH1 on channels 0, 24, and 78, respectively. The control interval 90ms, 144slots, is 3 times the broadcast interval. The interval between control sequences on the three channels is 30ms, i.e. 48slots, which is the same as the broadcast interval.

The wireless broadcast transmitting device sends the digital signal encapsulated as the control sequence of 2DH1 to the Bluetooth radio frequency transceiver through the Bluetooth baseband data and protocol processor, and sets the corresponding channel of the radio frequency transmitter. The radio frequency transmitter modulates the digital signal into a radio frequency signal on a preset channel and transmits the radio frequency signal to the wireless broadcast receiving equipment through an antenna.

The wireless broadcast communication method performed by the wireless broadcast receiving apparatus includes,

A wireless broadcast communication method performed on a wireless broadcast transmitting device includes,

1. the control sequence is transmitted according to the time slot shown in fig. 3, and the feedback information transmitted by the wireless broadcast receiving device is received in the second period within the control interval.

3. And processing the received feedback information.

4. A new control sequence is generated and broadcast.

In order to reduce the frequency of sending feedback information by the wireless receiving device, the wireless receiving device determines the minimum period and the frequency of sending the feedback information according to the number of active wireless receiving devices sent by the wireless broadcast transmitting device in the control sequence. The more active wireless broadcast receiving devices, the larger the minimum period for each wireless broadcast receiving device to transmit feedback information, and the less frequent the period. For example, the active wireless broadcast receiving devices are below 10, the feedback information is transmitted only in the FI period shown in fig. 3, and each wireless broadcast receiving device transmits the feedback information at most once every three control intervals, i.e., transmits 2DH1 packets once. If the number of active wireless broadcast receiving devices is greater than 10, 2DH1 packets are also transmitted for feedback information in the RX slot shown in fig. 4, and each wireless broadcast receiving device transmits feedback information once more than three broadcast intervals.

The wireless broadcast receiving device adopts a Bluetooth antenna, a Bluetooth radio frequency transceiver, a Bluetooth baseband data and protocol processor, a Bluetooth audio processor and a user interface.

The wireless broadcast receiving equipment receives the radio frequency signals of the control sequence and the audio data sent by the wireless broadcast radio frequency equipment through the antenna, demodulates the radio frequency signals into corresponding baseband data through the radio frequency transceiver, then recovers the synchronous information, the volume control information, the light control information and the audio data through the baseband data and protocol processor, and sends the audio data to the audio processor for further processing and playing.

The address, the received signal strength, the channel quality, the local volume adjustment, the music track switching, the light switching information and the like of the wireless broadcast receiving equipment are packaged into feedback information and sent to the wireless broadcast transmitting equipment in a feedback time slot (a third time period in a broadcast interval or a second time period in a control interval). Specifically, in this embodiment, these messages are encapsulated in a 2DH1 packet. The wireless broadcast receiving device sends the digital signal packaged as the feedback information of the 2DH1 to the Bluetooth radio frequency transceiver through the Bluetooth baseband data and protocol processor, and sets a corresponding channel of the radio frequency transmitter. The radio frequency transmitter modulates the digital signal into a radio frequency signal on a preset channel and transmits the radio frequency signal to the wireless broadcast receiving equipment through an antenna.

As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.

The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

While the preferred embodiments of the present application have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all alterations and modifications as fall within the scope of the application.

Claims

1. A wireless broadcast transmitting apparatus, characterized in that,

the wireless broadcast transmitting equipment communicates with the wireless broadcast receiving equipment in the time period of the broadcast interval and the control interval; the wireless broadcast transmitting equipment broadcasts and transmits data to be broadcast in a second time interval in the broadcast interval, broadcasts and transmits a control sequence in a first time interval in the control interval, and receives feedback information transmitted by the wireless broadcast receiving equipment in the second time interval in the control interval.

2. The wireless broadcast transmitting device of claim 1, wherein the broadcast interval includes a third time period, the wireless broadcast transmitting device receiving feedback information sent by a wireless broadcast receiving device during the third time period within the broadcast interval.

3. The wireless broadcast transmitting device of claim 2, wherein the second time period within the broadcast interval comprises a broadcast anchor time period and a broadcast retransmission time period,

the third time interval in the broadcast interval is located between the broadcast anchor time interval and the adjacent broadcast retransmission time interval or between two adjacent broadcast retransmission time intervals.

4. The wireless broadcast transmitting device of claim 1, wherein the wireless broadcast transmitting device counts the number of active wireless broadcast receiving devices and encapsulates the number of active wireless broadcast receiving devices in a control sequence; the number of the active wireless broadcast receiving devices is used for the wireless broadcast receiving devices to determine the time period and/or the minimum period for sending the feedback information.

5. The wireless broadcast transmitting device of claim 1, wherein the feedback information includes signal strength, and the wireless broadcast transmitting device decreases transmission power or decreases the number of broadcast retransmissions when receiving a signal strength higher than a preset high threshold but not receiving a signal strength lower than a preset low threshold, increases transmission power or increases the number of broadcast retransmissions when receiving a signal strength lower than a preset low threshold, and encapsulates the adjusted number of broadcast retransmissions into a control sequence to transmit to all wireless broadcast receiving devices; and/or the presence of a gas in the gas,

6. The wireless broadcast transmitting apparatus of claim 1, wherein when there is a control conflict in receiving the control information fed back by the plurality of wireless broadcast receiving apparatuses, the wireless broadcast transmitting apparatus performs corresponding control based on the latest control information according to the time of receiving the control information.

7. A wireless broadcast receiving apparatus, characterized in that,

the wireless broadcast receiving equipment communicates with the wireless broadcast transmitting equipment in the time period of the broadcast interval and the control interval; the wireless broadcast receiving device receives data to be broadcasted in the broadcast interval, the data to be broadcasted is received in the broadcast interval, the control sequence is received in the control interval, and the feedback information is sent to the wireless broadcast transmitting device in the second interval.

8. The wireless broadcast receiving device of claim 7, wherein the broadcast interval includes a third time period, the wireless broadcast receiving device to send feedback information to a wireless broadcast transmitting device during the third time period within the broadcast interval.

9. The wireless broadcast receiving device of claim 8, wherein the second time period within the broadcast interval comprises a broadcast anchor time period and a broadcast retransmission time period;

the third time interval in the broadcast interval is located between the broadcast anchor time interval and the adjacent broadcast retransmission time interval, or between two adjacent broadcast retransmission time intervals.

10. The wireless broadcast receiving device according to one of claims 7, 8 and 9, wherein the wireless broadcast receiving device determines the period and/or minimum period for sending the feedback information according to the number of active wireless broadcast receiving devices in the control sequence sent by the wireless broadcast transmitting device.

11. The wireless broadcast receiving device of claim 10, wherein the wireless broadcast receiving device transmits feedback information only during a second time period within the control interval when the number of active wireless broadcast receiving devices is less than a first threshold; when the number of the active wireless broadcast receiving devices is larger than a first threshold value, the wireless broadcast receiving devices send feedback information in a second time period in the control interval and a third time period in the broadcast interval; and/or the presence of a gas in the gas,

12. The wireless broadcast receiving device of claim 7, wherein the feedback information includes one or more of a sequence number, status information, and control information; wherein,

the status information comprises signal strength and/or channel quality;

13. The wireless broadcast receiving device of claim 12, wherein the wireless broadcast receiving device estimates a received signal strength when receiving data to be broadcast, and feeds back the signal strength by transmitting feedback information when the received signal strength is greater than a preset high threshold or lower than a preset low threshold.

14. A wireless broadcast communication system, comprising: a wireless broadcast transmitting device and one or more wireless broadcast receiving devices,

15. The wireless broadcast communication system of claim 14, wherein the broadcast interval includes a third time period, the third time period within the broadcast interval being used to transmit feedback information transmitted by a wireless broadcast receiving device.

16. The wireless broadcast communication system of claim 15, wherein the second time period within the broadcast interval includes a broadcast anchor time period and a broadcast retransmission time period;

17. The wireless broadcast communication system of claim 14, wherein the control sequence includes a number of active wireless broadcast receiving devices, the number of active wireless broadcast receiving devices being used to determine a period and/or minimum period for the wireless broadcast receiving devices to transmit feedback information.

18. The wireless broadcast communication system of claim 14, wherein the feedback information includes signal strength, the wireless broadcast receiving device estimates received signal strength when receiving data to be broadcast, and feeds back the signal strength by transmitting feedback information when the received signal strength is greater than a preset high threshold or lower than a preset low threshold; when the wireless broadcast transmitting equipment receives the signal intensity higher than the preset high threshold but does not receive the signal intensity lower than the preset low threshold, the transmitting power is reduced or the broadcast retransmission times are reduced, when the signal intensity lower than the preset low threshold is received, the transmitting power is increased or the broadcast retransmission times are increased, and the adjusted broadcast retransmission times are packaged into a control sequence to be transmitted to all wireless broadcast receiving equipment; and/or the presence of a gas in the gas,

19. The wireless broadcast communication system of claim 14, wherein the wireless broadcast transmitting apparatus performs corresponding control based on the latest control information when receiving control information fed back by the plurality of wireless broadcast receiving apparatuses when there is a control collision.