CN102340389B

CN102340389B - Wireless digital communication method

Info

Publication number: CN102340389B
Application number: CN201110295132.8A
Authority: CN
Inventors: 曾小波; 高强; 王恬; 陈立国; 王重乐; 周靖; 徐小龙; 姜斌斌; 张向东; 孟策; 刘新爱; 张娟
Original assignee: Goertek Inc
Current assignee: Goertek Inc
Priority date: 2011-09-30
Filing date: 2011-09-30
Publication date: 2014-08-13
Anticipated expiration: 2031-09-30
Also published as: CN102340389A

Abstract

The invention discloses a wireless digital communication method, which relates to the technical field of wireless communication. By the method, the communication flexibility of a wireless audio transmission system can be improved, the resource utilization rate of the system can be increased and the power consumption of the system can be effectively reduced. The wireless digital communication method provided by the embodiment of the invention comprises the following steps of: receiving frame structure regulation information from a transmitter, wherein the frame structure regulation information comprises radio frequency packet regulation information and is generated according to communication state indication information when the transmitter learns that a communication state is changed, and the communication state indication information indicates a receiver state and/or a channel state; and regulating a used frame structure by utilizing the frame structure regulation information, and performing data communication with the transmitter according to the regulated frame structure. The scheme is applied to a plurality of wireless communication systems with relatively higher requirements on transmission quality.

Description

Wireless digital communication method

Technical Field

The invention relates to the technical field of wireless communication, in particular to a wireless digital communication method.

Background

With the progress of wireless digital transmission technology, especially based on 2.4GHz frequency band, the system on chip integrates the characteristics of low power consumption, low radiation, low cost and the like, so that the wireless digital transmission technology can be widely applied to wireless digital audio products.

Currently, wireless digital audio transmission technologies mainly include three types of wireless transmission technologies based on wireless fidelity (WiFi), bluetooth and 2.4G. The wireless audio transmission technology based on WiFi has the advantage of high bandwidth, but the problems of high energy consumption, high radiation and the like are caused due to the fact that WiFi has high transmitting power; the wireless audio transmission technology based on the Bluetooth is relatively mature, but higher delay exists in the synchronous transmission of the audio; the wireless transmission technology based on 2.4G has the advantages of low power consumption, low radiation, low cost and the like.

Because related products of the wireless digital audio system generally use batteries for power supply, the requirement of the system on power consumption is strict, and the characteristic of near use of the wireless digital earphone system also puts forward the requirement on low radiation to the system, and the wireless digital earphone system is used as a system for synchronously transmitting audio data and also requires that the wireless system has low time delay and high reliability. In summary, under the requirements of low power consumption, low latency, and low radiation, most of the wireless digital headset systems in the present stage adopt a 2.4G transmission technology.

However, the current 2.4G-based wireless audio transmission technology is not mature. In the audio system based on the 2.4G wireless transmission technology at the present stage, a frame structure of a fixed radio frequency packet is mainly adopted, a used frame structure is pre-specified for an earphone end in the system, corresponding bandwidth resources are reserved for the earphone end, and audio data are transmitted on a reserved bandwidth according to the predetermined frame structure during wireless communication.

For example, the existing wireless audio communication mode is only directed to a communication system with a fixed scene, and a preset frame structure is only suitable for a sending end and an earphone end in the fixed scene, so that the communication mode is not flexible enough, and when the communication scene changes, the preset frame structure is probably not suitable for a new scene any more, which results in that audio data cannot be transmitted; in the existing frame structure, a plurality of retransmission packets are set for the data packet, and when the data packet is normally transmitted, data retransmission is not required.

Disclosure of Invention

The embodiment of the invention provides a wireless digital communication method, which can improve the flexibility of communication in a wireless audio transmission system, improve the utilization rate of system resources and effectively reduce the power consumption of the system.

In order to achieve the above purpose, the technical solution of the embodiment of the present invention is realized as follows:

the embodiment of the invention provides a wireless digital communication method, which comprises the following steps:

receiving frame structure adjustment information from a sending end, wherein the frame structure adjustment information comprises radio frequency packet adjustment information, the frame structure adjustment information is generated according to communication state indication information when the sending end learns that the communication state changes, and the communication state indication information indicates the state of a receiving end;

and adjusting the used frame structure by using the frame structure adjustment information, and carrying out data communication with the sending end according to the adjusted frame structure.

Further, when the sending end generates the frame structure adjustment information according to the receiving end state of the receiving end that has established the connection, the step of adjusting the used frame structure by using the frame structure adjustment information specifically includes:

when the previous communication state indication information indicates that at least one first receiving terminal is connected, the current communication state indication information indicates that the first receiving terminal is disconnected, and the generated radio frequency packet adjustment information indicates that a response packet corresponding to the first receiving terminal is deleted in a frame structure, a retransmission packet which is not larger than the radio frequency bandwidth occupied by the response packets of all the first receiving terminals is additionally arranged in the frame structure by using the received radio frequency packet adjustment information, and/or the time sequence position of sending the response packet is adjusted in the frame structure; or,

when the previous communication state indication information indicates that at least one second receiving terminal is not connected, the current communication state indication information indicates that the second receiving terminal is successfully connected, and the generated radio frequency packet adjustment information indicates that a response packet corresponding to the second receiving terminal is added in a frame structure, the received radio frequency packet adjustment information is used for deleting a retransmission packet which is not less than the radio frequency bandwidth occupied by the response packets of all the second receiving terminals in the frame structure, and/or adjusting the time sequence position of sending the response packet in the frame structure.

Further, when the sending end generates the frame structure adjustment information according to the receiving end status of whether the receiving end successfully receives the corresponding data packet, the step of adjusting the used frame structure by using the frame structure adjustment information further specifically includes:

the communication state indication information indicates that all data packets in the retransmission packet action range of the corresponding frame are successfully received, and in each frame period, the frame structure adjusted by the received radio frequency packet adjustment information does not contain the retransmission packet; or,

the communication state indication information indicates that the data packet loss condition exists in the retransmission packet action range of the corresponding frame, in each frame period, the adopted retransmission packet sequence is obtained by utilizing the received radio frequency packet adjustment information, and the position of the data packet corresponding to the retransmission packet is adjusted in the frame structure according to the retransmission packet sequence.

Further, the communication status indication information also indicates a channel status; when the sending end generates the frame structure adjustment information according to the acquired channel state of the current channel quality of the communication system, the frame structure adjustment information further includes relative position adjustment information, the relative position adjustment information indicates a time sequence position of a period for executing frame structure hopping relative to a period for sending the corresponding frame structure adjustment information, the frame structure used is adjusted by using the frame structure adjustment information, and the step of performing data communication with the sending end according to the adjusted frame structure further specifically includes:

and adjusting the used frame structure according to the frame structure adjustment information consistent with the sending end, receiving the radio frequency packet from the sending end according to the adjusted frame structure and sending a response packet to the sending end when the period for executing frame structure jump consistent with the sending end arrives.

Further, the method also includes adjusting the used frame structure according to the frame structure adjustment information consistent with the sending end in each frame period, receiving the radio frequency packet from the sending end according to the adjusted frame structure, and sending a response packet to the sending end.

Further, the method further comprises the following steps: when the current frame from the sending end comprises a retransmission packet, if no data packet is lost in the retransmission range of the current frame according to the statistics of the received radio frequency packet, the retransmission packet from the sending end is refused to be received; or,

when at least one retransmission packet of the current frame is received and no data packet is lost in the retransmission range of the current frame is confirmed, the retransmission packet from the sending end is refused to be continuously received; or,

and refusing to receive the retransmission packet from the sending end when the unreceived retransmission packet in the current frame does not contain the required retransmission packet according to the acquired retransmission packet sequence adopted by the sending end.

Further, the method further comprises the following steps: retransmitting a response packet to the sending end for many times for each frame of radio frequency packet received from the sending end; when a plurality of receiving ends exist, retransmitting the response packet of each receiving end to the sending end for many times according to the set time sequence position, wherein two adjacent response packets in the set time sequence position belong to different receiving ends.

Further, the method further comprises the following steps: receiving frame structure adjustment information issued by a sending end through a data packet, wherein the frame structure adjustment information is carried in the data packet; or, receiving frame structure adjustment information issued by a sending end through a control packet, where the control packet is generated according to the frame structure adjustment information.

It can be seen from the above that, the technical solution of the embodiment of the present invention provides a novel wireless digital audio communication scheme, which makes a corresponding adjustment policy according to the obtained actual communication state of the system, and enables the receiving end and the sending end to learn the adjustment policy through the generated frame structure adjustment information, thereby implementing a wireless communication mode that dynamically changes the used frame structure according to the communication state, significantly improving the flexibility of a wireless audio transmission system, ensuring the successful implementation of audio communication in various communication scenes, and improving user experience.

Furthermore, the scheme can flexibly set the specific content of the radio frequency packet to be transmitted by dynamically adjusting the frame structure, thereby controlling the system resource to be occupied, reducing the system power consumption to the maximum extent and improving the utilization rate of the system resource under the condition of meeting the requirements of high reliability, low delay and low radiation, and having stronger feasibility and wider application prospect.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a flowchart illustrating a wireless digital communication method according to an embodiment of the present invention;

fig. 2 is a schematic diagram of a basic framework of a wireless digital headset system according to a second embodiment of the present invention;

fig. 3 is a schematic flow chart of a communication method of a wireless digital headset according to a second embodiment of the present invention;

fig. 4 is a schematic diagram of a frame structure used in communication of a wireless digital headset according to a second embodiment of the present invention;

fig. 5 is a schematic diagram of a frame structure obtained by adjustment after a new earphone end is connected with a sending end in a scene shown in fig. 5 according to a second embodiment of the present invention;

fig. 6 is a schematic diagram of a frame structure obtained by adjustment after connection between an earphone end and a transmitting end is lost, according to a second scenario in fig. 6 according to a second embodiment of the present invention;

fig. 7 is a schematic diagram of a frame structure adopted in a transition phase according to a second embodiment of the present invention;

fig. 8 is a schematic diagram of a frame structure when a transmitting end is connected to a plurality of earphone ends according to a second embodiment of the present invention;

fig. 9 is a schematic diagram of a frame structure when multiple retransmission of an acknowledgement packet is adopted according to a second embodiment of the present invention;

fig. 10 is a schematic diagram of another frame structure when multiple retransmission of an acknowledgement packet is adopted according to a second embodiment of the present invention;

fig. 11 is a schematic structural diagram of a receiving end device in wireless digital communication according to a third embodiment of the present invention.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it is to be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The data transmission problem solved by the communication method provided by the scheme is a basic problem in the field of wireless digital communication, and two ends of the wireless digital communication are independent individuals, so that a communication method needs to be realized between two sides of a communication link, the method ensures the normal work of the communication link, and ensures the normal transmission and reception of a radio frequency packet. It can be understood that the present solution is not limited to the wireless headset system, but may also be applied to other communication systems with higher requirements on transmission quality, such as a wireless video system, a wireless data acquisition system or a wireless data transmission system.

The technical idea of the invention is mainly that the frame structure of the radio frequency packet periodically transmitted in the communication link is dynamically changed according to the communication state in the wireless digital earphone system, such as the number of earphone ends in the system, the quality of a communication channel and the like, thereby realizing a high-quality and high-reliability communication method used by the wireless digital earphone system, improving the utilization rate of wireless transmission bandwidth and effectively reducing the power consumption of the system.

An embodiment of the present invention provides a wireless digital communication method, and referring to fig. 1, the method includes:

11: receiving frame structure adjustment information from a sending end, wherein the frame structure adjustment information comprises radio frequency packet adjustment information, the frame structure adjustment information is generated by the sending end according to communication state indication information when the sending end learns that the communication state changes, and the communication state indication information indicates the state of a receiving end and/or the state of a channel.

12: and adjusting the used frame structure by using the frame structure adjustment information, and carrying out data communication with the sending end according to the adjusted frame structure.

The above steps 11 and 12 can be implemented by a device on the terminal side, such as an earphone-side device.

Further, the receiving end state may indicate a receiving end that establishes a connection with the transmitting end, for example, in a wireless digital headset communication scenario, the receiving end state is an earphone end state, and the earphone end state indicates an earphone end that establishes a connection with the transmitting end, or the receiving end state may also indicate whether the receiving end successfully receives a corresponding data packet. The channel state indicates the current channel quality of the communication system.

Further, in the same period, the frame structure adjustment information adopted by the sending end and the receiving end when performing frame structure adjustment should be kept consistent, so as to ensure that the sending end and the receiving end communicate by adopting the same frame structure in the radio frequency packet transmission of the same period.

It can be understood that, for some scenarios applicable to asynchronous transmission, in the radio frequency packet transmission in the same period, the sending end and the receiving end can communicate by using different frame structures, and in the same period, the frame structure adjustment information used when the sending end and the receiving end perform frame structure adjustment should also be different.

For the convenience of clearly describing the technical solutions of the embodiments of the present invention, in the embodiments of the present invention, the terms such as "first", "second", "1", "2", and the like and the numerical references are used to distinguish the same items or similar items with basically the same functions and actions, and those skilled in the art can understand that the terms and the numerical references do not limit the number and the execution order.

The wireless digital communication method according to the second embodiment of the present invention is described below with reference to fig. 2 to 10. In the embodiment of the present invention, a scenario in which a sending end performs wireless digital communication with an earphone end is taken as an example for description, it can be understood that the present invention is not limited to a wireless digital earphone communication system, and may also be applied to other communication systems, such as a wireless video system, a wireless data acquisition system or a wireless data transmission system. For the sake of clarity, referring to fig. 2, an application scenario of the embodiment of the present invention is first described below.

Fig. 2 shows a basic framework schematic of a wireless digital headset system. The wireless digital earphone system consists of a sending end 100 and a plurality of earphone ends, for example, an earphone end 1 to an earphone end N, wherein N is a label, and the numerical value of N can be changed according to the actual condition in the system. The sending end 100 transmits a radio frequency packet containing audio data to each earphone end through the radio frequency module 101, where the radio frequency packet may include a data packet 103 (or a control packet 103) and receives a response packet 102 returned by each earphone end. Each earphone receives the data packet 103 (or the control packet 103) sent to the channel by the sender through a respective radio frequency module, such as the radio frequency module 111 and the radio frequency module 121, and returns the response packet 102 to the sender.

It is to be understood that when the basic block diagram shown in fig. 2 is applied to other wireless digital communication systems, these wireless digital communication systems include a data transmitting end and a plurality of data receiving ends, the data transmitting end transmits data to each receiving end, and the data receiving ends receive the data of the transmitting end and return response packets.

In the wireless digital earphone system, a sending end packs the obtained audio data in a radio frequency packet mode and sends the audio data to a channel through a radio frequency module, and an earphone end receives the radio frequency packet in the channel through the radio frequency module and restores the radio frequency packet into the audio data.

The frame structure according to the embodiments of the present invention refers to an organization structure of periodic radio frequency packets used in a wireless digital communication system, and is determined by the number of radio frequency packets that need to be actually transmitted in the frame, the number of response packets that need to be transmitted/received, and the like. The radio frequency packet to be transmitted in the present scheme may include one or more of a data packet, a reselection packet, a response packet, a control packet, and the like, as needed.

The data packets transmit audio data to be transmitted in a frame period, the size of the data packets is determined by a system radio frequency module, and the number of the data packets is determined by the frame period and the sampling rate of the audio data.

The response packet transmits the description information of all the radio frequency packet receiving conditions of the earphone end in one frame period.

In the above-mentioned scheme, the frame structure adjustment information generated by the control packet transmission may be used to transmit the control information required in the communication.

In consideration of the existence of channel interference, the scheme organizes the frame structure of radio frequency transmission in a mode of emphasizing a data packet to a transmission packet under a general condition, and ensures reliable transmission of audio data by adopting a retransmission packet. The number of retransmission packets can be determined by the radio frequency bandwidth, and more retransmission packets can be used in a high bandwidth system to ensure reliable transmission of audio data.

Specifically, the retransmission packet transmits a data packet that needs to be retransmitted within an action range of the retransmission packet, and for a certain retransmission packet, the action range of the retransmission packet refers to a range of data packets that can be retransmitted by the retransmission packet and that are within a time range before the current frame period. For example, the retransmission packet used by the wireless digital headset system has a coverage of 8 frame periods, and the retransmission packet a is obtained in the current frame period N, and the data packet that can be retransmitted is any lost data packet from (N-8) frame period to (N-1) frame period. The (N-8) frame period to the (N-1) frame period are referred to as the coverage of the N-th frame retransmission packet.

Referring to fig. 4, an example of a frame structure provided by an embodiment of the present invention for a scenario of a transmitting end and an earphone end is shown, in which a maximum transmission bandwidth of a radio frequency supports the use of 1 control packet, 6 data packets, 9 retransmission packets, and 1 acknowledgement packet.

Based on the basic architecture shown in fig. 2, referring to fig. 3, the communication method of the wireless digital headset according to the embodiment of the present invention specifically includes the following processing:

31: the sending end obtains the communication state indication information.

The communication status indication information indicates the state of the earphone and the state of the channel, and the specific manner of acquiring the information varies according to the content of the communication status indication information, for example,

when the state of the earphone end indicates the earphone end which is connected, namely the earphone end is connected with the sending end, the sending end detects the connection state of the earphone end to obtain and record communication state indication information, namely the state of the earphone end which is connected is obtained and recorded;

when the state of the earphone end indicates whether the earphone end successfully receives the corresponding data packet, the sending end acquires the communication state indication information according to the received response packet from the earphone end, namely whether the earphone end successfully receives the earphone end state of the corresponding data packet;

when the channel state indicates the current channel quality of the communication system, the sending end obtains the communication state indication information by detecting the channel state, namely obtaining the channel state of the current channel quality of the communication system;

32: and judging whether the communication state changes, if so, executing step 33, and if not, still utilizing the current frame structure to carry out data transmission.

The communication state is known to change according to the communication state indication information, for example:

when the obtained last communication state indicating information (for example, the t-1 th communication state indicating information) indicates that the connection between the first earphone end and the sending end is established, and the current communication state indicating information (for example, the t-1 th communication state indicating information) indicates that the connection between the first earphone end and the sending end is disconnected, it is determined that the communication state changes, that is, the connection between the earphone end is lost, and the earphone end is separated from the wireless communication system.

When the obtained last communication state indicating information (for example, the t-1 th communication state indicating information) indicates that the second earphone end is not connected with the sending end, and the current communication state indicating information (for example, the t-1 th communication state indicating information) indicates that the second earphone end is successfully connected with the sending end, it is determined that the communication state changes, that is, a new earphone end is added into the wireless communication system.

When the channel quality indicated by the acquired first communication state indicating information (for example, the tth communication state indicating information) is higher than the channel quality indicated by the second communication state indicating information (for example, the t-3 th communication state indicating information), it is determined that the communication state changes, that is, the channel condition is improved, and the channel quality is improved.

33: frame structure adjustment information is generated.

The sending end obtains the current actual communication state of the system through the communication state indication information, makes a corresponding adjustment strategy, and enables the earphone end and the sending end to obtain the adjustment strategy through the generated frame structure adjustment information, the change contents indicated by the communication state indication information are different, and the specific contents of the generated frame structure adjustment information are also different, which at least includes the following four conditions:

first case

In this case, the state of the earphone end in the communication state indication information indicates the earphone end connected to the transmitting end, and it is known that at least one second earphone end exists according to the communication state indication information, where the second earphone end satisfies the following conditions: the last communication state indication information indicates that the second earphone end is not connected with the sending end, and the current communication state indication information indicates that the second earphone end is successfully connected with the sending end, namely, a new earphone end is added into the wireless communication system.

The frame structure adjustment information includes radio frequency packet adjustment information, and the generated radio frequency packet adjustment information indicates that a response packet corresponding to the second earphone end is added to the frame structure. Here, specifically referring to the scenario shown in fig. 4, if the example shown in fig. 4 is a frame structure before the communication state changes, referring to fig. 5, a frame structure example obtained by adjusting after connecting a new headset end in the system is shown, that is, fig. 5 shows a frame structure example after the communication state changes.

Compared with the frame structure in fig. 4, the frame structure in fig. 5 is mainly different in that the number of retransmission packets is reduced in the frame structure at the transmitting end, and the reduction of the retransmission packets is to release bandwidth resources occupied by the retransmission packets, so as to allocate bandwidth to the response packet (response packet 2 shown in fig. 4) of the newly added earphone end 2 (i.e., the second earphone end), thereby completing transmission of the response packet of the earphone end 2.

Since the frame structure shown in fig. 4 has already reached the maximum support capability of the transmission bandwidth of the radio frequency, here, when a new earphone is added, retransmission packets must be reduced, and the reduced 1 retransmission packet is only an example, and a plurality of retransmission packets may also be reduced as long as it is ensured that the retransmission packet whose required radio frequency bandwidth is not less than the radio frequency bandwidth occupied by the added response packet is deleted in the frame structure. When the radio frequency bandwidth occupied by the retransmission packet is the same as the radio frequency bandwidth occupied by the response packet, the number of the retransmission packets is reduced to be greater than or equal to the number of the response packets to be newly added. It is understood that the number of retransmitted packets may not be reduced if the bandwidth resources in the system are sufficient.

As described above, when the generated rf packet adjustment information indicates that a response packet corresponding to the second earphone end is added to the frame structure, the rf packet adjustment information may further indicate: deleting the retransmission packet which is not less than the radio frequency bandwidth occupied by the added response packet in the frame structure of the sending end, namely deleting the radio frequency bandwidth required by the retransmission packet which is not less than the radio frequency bandwidth occupied by the added response packet, or deleting the retransmission packet which is not less than the radio frequency bandwidth occupied by the added response packet in the frame structure of the sending end and adjusting the time sequence position of the response packet at the receiving earphone end in the frame structure, or only adjusting the time sequence position of the response packet at the receiving earphone end in the frame structure.

At the earphone end, correspondingly, the received radio frequency packet adjustment information is used for deleting the retransmission packet which is not less than the radio frequency bandwidth occupied by all the second earphone end response packets in the frame structure, namely the radio frequency bandwidth required by the deleted retransmission packet is not less than the radio frequency bandwidth occupied by all the second earphone end response packets, or the retransmission packet which is not less than the radio frequency bandwidth occupied by all the second earphone end response packets is deleted and the time sequence position of sending the response packets in the frame structure is adjusted, or only the time sequence position of sending the response packets in the frame structure is adjusted.

Second case

In this case, the state of the earphone end in the communication state indication information indicates the earphone end connected to the transmitting end, and it is known that at least one first earphone end exists according to the communication state indication information, where the first earphone end satisfies the following conditions: the last communication state indication information indicates that the first earphone end is successfully connected with the sending end, and the current communication state indication information indicates that the first earphone end is disconnected with the sending end, namely, the connection of the earphone end is lost and the earphone end is separated from the wireless communication system.

The frame structure adjustment information includes radio frequency packet adjustment information, and at this time, the generated radio frequency packet adjustment information indicates that the response packet corresponding to the first earphone end in the frame structure is deleted, that is, the frame structure of the transmitting end no longer includes the response packet corresponding to the first earphone end. Here, specifically referring to the scenario shown in fig. 5, if the example shown in fig. 5 is a frame structure example before the communication state changes, referring to fig. 6, a frame structure example obtained by adjusting after the connection of one earphone end is lost in the system, that is, a frame structure example after the communication state changes is shown.

Fig. 6 is a diagram illustrating a frame structure change from 2 earpieces connected on the transmitting side to one missing earpiece. When a sending end is connected with two earphone ends, a frame structure shown in fig. 5 is used, in the structure, the sending end frame structure used by the sending end can be called as a sending end frame structure 2, the earphone end 1 using the earphone end frame structure can be called as an earphone end frame structure 1, and the earphone end 2 using the earphone end frame structure can be called as an earphone end frame structure 2; when the earphone end 1 is disconnected (or lost), the frame structure shown in fig. 6 is needed, in which the transmitting end frame structure used by the transmitting end may be referred to as a transmitting end frame structure 1, and the earphone end frame structure used by the earphone end 2 may be referred to as an earphone end frame structure 3.

As can be seen from comparison between fig. 5 and fig. 6, after the earphone terminal 1 is lost, the number of retransmission packets is increased in the frame structure of the transmitting end (the frame structure 1 of the transmitting end), and the response packet (the response packet 1 shown in fig. 5) of the lost earphone terminal 1 is no longer retained; correspondingly, a retransmission packet is added in the frame structure (frame structure 1 at the earphone end) of the earphone end 2, and since deletion of the response packet 1 does not affect the time sequence position of the response packet 2, it is mainly considered whether the added retransmission packet 9 affects the response packet 2 in the earphone end 2, if not, the time sequence position of the response packet 2 in the frame structure 2 at the earphone end does not need to be adjusted, if so, the time sequence position of the response packet 2 in the frame structure 2 at the earphone end needs to be adjusted, and in the scene of fig. 6, the time sequence position of the response packet 2 is adjusted to the position of the response packet 1 in the frame structure 1 at the earphone end, so as to obtain the frame structure 3 at the earphone end.

Here, the operation of increasing the number of the retransmission packets is not necessary, and the number of the original retransmission packets may be kept unchanged, or when the current channel quality is detected to be better, the number of the retransmission packets may be reduced, so as to save the system bandwidth. As long as it is ensured that the radio frequency bandwidth required by the added retransmission packet is not greater than the radio frequency bandwidth occupied by the deleted response packet, the above description of fig. 5 and 6 mainly takes a scenario in which the radio frequency bandwidth occupied by the retransmission packet is the same as the radio frequency bandwidth occupied by the response packet as an example.

As described above, when the generated radio packet adjustment information indicates to delete the response packet corresponding to the first earphone end in the frame structure, the radio packet adjustment information may further indicate: the method comprises the steps that a transmitting end adds a retransmission packet which is not more than the radio frequency bandwidth occupied by a deleted response packet in a frame structure, namely the radio frequency bandwidth needed by the added retransmission packet is not more than the radio frequency bandwidth occupied by the deleted response packet, or adds the retransmission packet which is not more than the radio frequency bandwidth occupied by the deleted response packet in the frame structure and adjusts the time sequence position of the response packet at a receiving earphone end in the frame structure; alternatively, only the timing position of the receiving earphone-side response packet in the frame structure is adjusted.

At the earphone end, correspondingly, a retransmission packet which is not more than the radio frequency bandwidth occupied by all the first earphone end response packets is added in the frame structure by utilizing the received radio frequency packet adjustment information, or the retransmission packet which is not more than the radio frequency bandwidth occupied by all the first earphone end response packets is added in the frame structure and the time sequence position of sending the response packets in the frame structure is adjusted, or only the time sequence position of sending the response packets in the frame structure is adjusted.

Because the prior art adopts a mode of reserving bandwidth resources for the earphone end in advance, even if the earphone end is in an unconnected state and cannot transmit data, the system still reserves corresponding bandwidth for the earphone end, thereby causing the waste of bandwidth resources and leading to lower bandwidth utilization rate. In order to solve the problem, further, after the earphone end 1 is lost, the sending end releases the bandwidth resources reserved for the earphone end in advance, and reallocates the released bandwidth resources, thereby further improving the utilization rate of the system resources.

Third case

In this case, the state of the earphone end in the communication state indication information indicates whether the earphone end successfully receives the corresponding data packet. And the transmitting end acquires the communication state indication information according to the received response packet from the earphone end. Because the response packet describes the receiving condition of the radio frequency packet in each frame period, the sending end can know whether the earphone end successfully receives the corresponding data packet according to the response packet.

In the third case, in each frame period, the transmitting end does not include the retransmission packet in the frame structure according to the retransmission policy decision, and does not transmit the retransmission packet to the earphone end. The retransmission policy is a determination method used at the transmitting end to determine the retransmission packet sequence and the number of retransmission packets to be transmitted in the frame, based on the response packets from the plurality of ear-phones.

For example, when the transmitting end knows that all data packets in the retransmission packet action range of the corresponding frame are successfully received according to the communication state indication information, the frame structure indicated by the generated radio frequency packet adjustment information does not contain the retransmission packet. The corresponding frame is a selected reference frame which is used as an adjusting basis in the adjusting frame structure, when all data packets in the action range of the retransmission packet of the corresponding frame are successfully received, namely the retransmission packet of the corresponding frame is deleted without influencing the data reception, and the adjusted frame structure is considered to not include the retransmission packet, so that the normal data reception can be ensured.

At this time, correspondingly, the frame structure adjusted by the earphone end by using the received radio frequency packet adjustment information does not contain the retransmission packet.

Further, the present invention also provides a scheme for adjusting a frame structure, where a retransmission packet (e.g., a retransmission packet sequence) is adjusted according to a reception condition of the retransmission packet in each frame period, specifically as follows:

in each frame period, when the transmitting end learns that a data packet loss condition exists in a retransmission packet action range of a corresponding frame, the transmitting end determines an adopted retransmission packet sequence according to a retransmission strategy, adjusts the position of a retransmission packet in a frame structure according to the retransmission packet sequence, and informs the retransmission packet sequence to a corresponding earphone end, for example, the retransmission packet sequence is carried in a control packet and is sent to the earphone end, so as to perform data communication with the earphone end according to the adjusted frame structure.

In this way, the transmitting end predetermines the retransmission packet sequence in the frame structure, and the retransmission packet sequence indicates the positions of the data packets corresponding to different retransmission packets.

Correspondingly, at the earphone end, the retransmitted data packet is received by using the received radio frequency packet adjustment information according to the retransmission packet sequence acquired from the sending end.

In this processing mode, after determining the retransmission packet sequence to be retransmitted, the sending end may broadcast the retransmission packet sequence information to all the earphone ends in the system through the control packet (or data packet), and when finding that the retransmission packet sequence of the currently received frame does not include the retransmission packet required by the earphone end after receiving the control packet, the earphone end will finish receiving the retransmission packet in advance, so as to save the system power consumption.

In the third case, the two scenarios of not sending the retransmission packet to the earphone end and determining the adopted retransmission packet sequence in advance according to the retransmission policy can be performed in each frame period, and in each frame period, the sending end adjusts the used frame structure according to the frame structure adjustment information, sends the radio frequency packet to the earphone end according to the adjusted frame structure, and receives the response packet from the earphone end.

In this case, the frame structure can be adjusted by using the frame structure adjustment information after the frame structure adjustment information is generated, and the frame structure can be adjusted in real time without waiting for the arrival of a frame structure transition point.

It will be appreciated that the present solution also does not exclude in the third case the way in which the frame structure adjustment is performed after the arrival of the frame structure trip point.

Fourth case

In this case, the current channel quality is known to be improved or reduced from the previous channel quality based on the communication state indication information. The sending end can obtain the communication state indication information by detecting the channel state.

Here, the current channel quality and the previous channel quality are both statistical results of channel quality measurements for several frame periods within a certain range.

"current" refers to a frame period range in which channel detection is performed to generate communication state indication information for adjusting a frame structure this time, where the frame period range is usually multiple frame periods, and current channel quality is a result obtained by counting channel quality in the current frame period range.

The scheme sets a frame structure jump point or a frame structure jump period, generates frame structure adjustment information before the frame structure jump period, and simultaneously adopts a new frame structure for communication by a sending end and an earphone end when the frame structure jump period arrives. The transmitting end may broadcast the frame structure adjustment information to the earphone end existing in the system using all frame periods after the frame structure adjustment information is generated and before the frame structure hopping period comes. By setting the frame structure hopping period, the sending end and the earphone end can acquire frame structure adjustment information before the frame structure is adjusted, so that the successful realization of the adjustment operation is ensured.

The above-mentioned frame structure adjustment information includes relative position adjustment information indicating a timing position of a period for performing frame structure hopping with respect to a period for transmitting the corresponding frame structure adjustment information; when the channel quality indicated by the first communication state indication information is higher than the channel quality indicated by the second communication state indication information, the value of the time sequence position indicated by the relative position adjustment information generated according to the first communication state indication information is smaller than the value of the time sequence position indicated by the relative position adjustment information generated according to the second communication state indication information.

34: and sending the frame structure adjustment information to a corresponding earphone end.

The sending end can carry the frame structure adjustment information in a data packet and send the data packet to the earphone end, or generate a control packet from the frame structure adjustment information, for example, independently pack the frame structure adjustment information into a control packet and send the control packet to the earphone end.

Correspondingly, the earphone end receives and sends frame structure adjustment information sent by the sending end through a data packet, and the frame structure adjustment information is carried in the data packet; or, the earphone end receives and sends the frame structure adjustment information sent by the sending end through a control packet, and the control packet is generated according to the frame structure adjustment information.

35: and adjusting the used frame structure, and carrying out data communication according to the adjusted frame structure.

After the frame structure jump cycle comes, the sending end and the earphone end adjust the used frame structure according to the obtained frame structure adjusting information, and when the frame structure jump cycle comes, the sending end sends a radio frequency packet to the earphone end and receives a response packet from the earphone end according to the adjusted frame structure.

Further, before the frame structure used is adjusted by using the frame structure adjustment information, that is, in a transition phase of waiting for a frame structure transition period to arrive, the method further includes:

the reception of the response packet is prohibited at a position corresponding to the first earphone end in the response packet of the currently used frame structure. Since the transmitting end needs a certain power consumption when starting the receiving function of the radio frequency packet and being in the receiving state, the power consumption is further reduced by forbidding the receiving function.

Referring to fig. 7, a schematic diagram of a frame structure used in a transition phase is shown, in which a transmitting end considers that the earphone end 1 is lost, and starts to broadcast a frame to adjust the frame structure used in the transition phase, and in which the transmitting end prohibits reception of a response packet (response packet 1) at a position of the response packet of the earphone end 1 to reduce power consumption.

The above description has been given only by taking one transmitting end and one earphone end, or only one transmitting end and two earphone ends as examples. However, the present solution is not limited thereto, and the present solution can be flexibly applied to a scenario including a plurality of earphone terminals, and referring to fig. 8, a frame structure diagram when a transmitting terminal is connected to a plurality of earphone terminals is shown. When a transmitting end is connected with x earphone ends, a frame structure of the system is composed of 1 control packet, 6 data packets, n retransmission packets and x response packets, wherein the x response packets correspond to the x earphone ends, for example, the response packet 1 corresponds to the earphone end 1, the response packet 2 corresponds to the earphone end 2, and the response packet x corresponds to the earphone end x. The maximum value of x is the maximum number of the earphone ends supported by the system, and x is determined by factors such as radio frequency bandwidth, frame period length and radio frequency packet size.

Further, the scheme also sets a mechanism for actively finishing retransmission packet reception for the earphone end, and the mechanism comprises the following processing steps:

when the current frame from the sending end comprises the retransmission packet, if the fact that no data packet is lost in the retransmission range of the current frame is confirmed according to statistics of the received radio frequency packet, the retransmission packet from the sending end is refused to be received, namely all the data packets are successfully received, and the retransmission packet does not need to be received any more, so that power consumption is saved; or,

when at least one retransmission packet of the current frame is received and no data packet is lost in the retransmission range of the current frame is confirmed, the retransmission packet from the sending end is refused to be continuously received, namely all data packets in the action range of the retransmission packet of the current frame period are successfully received by the received retransmission packet at present, and the receiving operation of the retransmission packet is finished in advance so as to save power consumption.

Because the retransmission strategy adopted by the scheme is established on the basis that the response packet is returned to the sending end and the receiving condition of the radio frequency packet is described by the response packet, in order to ensure the optimal use of the retransmission strategy, the correct transmission of the response packet needs to be ensured as much as possible.

In order to achieve the effect, the scheme also provides another form of frame structure, referring to fig. 9 and 10, a frame structure of retransmitting the response packets for multiple times is adopted, and under the frame structure, the earphone end returns at least two response packets to the sending end for each frame of radio frequency packets received from the sending end. The specific times or the number of response packets are determined according to the system factors such as radio frequency bandwidth and system power consumption. For clarity, fig. 9 and 10 show the frame structure of 2 retransmission of the acknowledgement packet used after the system connects multiple earphone terminals. Compared with the frame structure in fig. 9, fig. 10 temporally misaligns the retransmission of the response packet, that is, adjusts the timing position of the response packet, so as to avoid all the response packets of the same earphone end from being lost due to short-time burst interference, and ensure that the response packet can be successfully transmitted to the transmitting end.

It can be seen from the above that, the technical solution of the embodiment of the present invention provides a novel wireless digital audio communication scheme, which makes a corresponding adjustment policy according to the obtained actual communication state of the system, and enables the earphone end and the sending end to obtain the adjustment policy through the generated frame structure adjustment information, thereby implementing a wireless communication mode that dynamically changes the used frame structure according to the communication state, significantly improving the flexibility of a wireless audio transmission system, ensuring the successful implementation of audio communication in various communication scenes, and improving user experience.

An embodiment of the present invention further provides a receiving end device in wireless digital communication, and referring to fig. 11, the receiving end device 110 includes the following units:

an adjustment information receiving unit 111, configured to receive frame structure adjustment information from a sending end, where the frame structure adjustment information includes radio frequency packet adjustment information, the frame structure adjustment information is generated by the sending end according to communication state indication information when the sending end learns that a communication state changes, and the communication state indication information indicates a receiving end state and/or a channel state;

a frame structure adjusting unit 112, configured to adjust the used frame structure by using the frame structure adjustment information, and perform data communication with the sending-end device according to the adjusted frame structure.

The receiving end device 110 may be implemented by different devices according to different actual network structures, and may be an earphone end in a wireless communication earphone system. The receiving end state may indicate a receiving end connected to the transmitting end, for example, in a wireless digital headset communication scenario, the receiving end state is an earphone end state, and the earphone end state indicates an earphone end connected to the transmitting end, or the receiving end state may also indicate whether the receiving end successfully receives a corresponding data packet. The channel state indicates the current channel quality of the communication system.

When the generated radio frequency packet adjustment information indicates that the response packet corresponding to the first earphone end is deleted in the frame structure, the generated radio frequency packet adjustment information further indicates that a retransmission packet not greater than the radio frequency bandwidth occupied by the deleted response packet is added in the frame structure, and/or the timing position of receiving a plurality of response packets in the frame structure is adjusted, the frame structure adjustment unit 112 is specifically configured to add a retransmission packet not greater than the radio frequency bandwidth occupied by all the first earphone end response packets in the frame structure by using the received radio frequency packet adjustment information, and/or the timing position of sending the response packet by the adjustment frame in the frame structure;

when the generated rf packet adjustment information indicates that the response packet corresponding to the second earphone end is added to the frame structure, the generated rf packet adjustment information further indicates to delete the retransmission packet not smaller than the rf bandwidth occupied by the added response packet in the frame structure, and/or to adjust the timing position of the response packet to be received in the frame structure, then the frame structure adjustment unit 112 is specifically configured to delete the retransmission packet not smaller than the rf bandwidth occupied by all the second earphone end response packets in the frame structure by using the received rf packet adjustment information, and/or to adjust the timing position of transmitting the response packet in the frame structure.

If the state of the earphone end indicates whether the earphone end successfully receives the corresponding data packet, in each frame period, when all the data packets in the action range of the retransmission packet of the corresponding frame are successfully received according to the communication state indication information, the frame structure indicated by the generated radio frequency packet adjustment information does not contain the retransmission packet; or, in each frame period, when it is known that a data packet loss condition exists in the retransmission packet action range of the corresponding frame according to the communication state indication information, determining the adopted retransmission packet sequence according to the retransmission strategy, and the generated radio frequency packet adjustment information indicates the position of the data packet corresponding to the retransmission packet in the frame structure. At this time, the frame structure adjusting unit 112 is specifically configured to adjust the frame structure used in each frame period according to the frame structure adjustment information consistent with the transmitting end, and receive the radio frequency packet from the transmitting end and send the response packet to the transmitting end according to the adjusted frame structure. At this time, the receiving-end device 110 may also use the third reception control unit to finish receiving the retransmission packet in advance or need not receive the retransmission packet, so as to save power consumption.

If the channel state indicates the current channel quality of the communication system, the frame structure adjustment information further includes relative position adjustment information indicating a timing position of a period for performing frame structure hopping with respect to a period for transmitting the corresponding frame structure adjustment information.

The frame structure adjusting unit 112 is specifically configured to adjust the used frame structure according to the frame structure adjustment information consistent with the sending end, and when a period of performing frame structure hopping consistent with the sending end arrives, receive the radio frequency packet from the sending end according to the adjusted frame structure, and send a response packet to the sending end.

Further, when the sending end carries the frame structure adjustment information in a data packet and sends the data packet to the earphone end device, or generates a control packet according to the frame structure adjustment information and sends the control packet to the receiving end device;

at this time, correspondingly, the adjustment information receiving unit 111 is specifically configured to receive frame structure adjustment information sent by the sending end through the data packet or the control packet.

Further, the receiving end may actively or in advance end the receiving of the retransmission packet according to the information from the transmitting end or need not receive the retransmission packet, so as to save power consumption, where the receiving end device further includes:

a first receiving control unit, configured to, when a current frame from a sending end includes a retransmission packet, deny reception of the retransmission packet from the sending end if it is determined that no data packet is lost within a retransmission range of the current frame according to statistics on received radio frequency packets; and/or the presence of a gas in the gas,

the second receiving control unit is used for refusing to continuously receive the retransmission packet from the sending end when the second receiving control unit confirms that no data packet is lost in the retransmission range of the current frame after receiving at least one retransmission packet of the current frame; and/or the presence of a gas in the gas,

and the third receiving control unit is used for refusing to receive the retransmission packet from the sending end when the unreceived retransmission packet in the current frame does not contain the required retransmission packet according to the acquired retransmission packet sequence adopted by the sending end. Here, there are two cases of the unreceived retransmission packet, one case being that neither a retransmission packet from the transmitting end is received; in another case, a part of the retransmission packets from the transmitting end is received, and there are remaining retransmission packets that have not been received.

Further, the present solution also provides another form of frame structure, see fig. 10 and 11, a frame structure of retransmitting the response packet for multiple times is adopted, and in this frame structure, the receiving end returns at least two identical response packets to the transmitting end for each frame of radio frequency packet received from the transmitting end. And when a plurality of receiving ends exist, retransmitting the response packet of each receiving end to the sending end for a plurality of times according to the set time sequence position, wherein two adjacent response packets in the set time sequence position belong to different earphone ends, namely the response packets of different receiving ends are alternately arranged. At this time, the frame structure adjusting unit 112 is further specifically configured to return at least two response packets to the transmitting end for each frame of radio frequency packet received from the transmitting end.

The specific working modes of each device and unit in the device embodiment of the invention are shown in the method embodiment of the invention.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims

1. A method of wireless digital communication, the method comprising:

adjusting the used frame structure by using the frame structure adjustment information, and performing data communication with the sending end according to the adjusted frame structure;

wherein, when the sending end generates the frame structure adjustment information according to the receiving end state of the receiving ends which have established connection, when the last communication state indication information indicates that at least one first receiving end has established connection, the current communication state indication information indicates that the first receiving end is disconnected, and the generated radio frequency packet adjustment information indicates that the response packet corresponding to the first receiving end is deleted in the frame structure,

the adjusting the frame structure using the frame structure adjustment information specifically includes:

utilizing the received radio frequency packet adjustment information to add a retransmission packet which is not more than the radio frequency bandwidth occupied by all the first receiving end response packets in the frame structure, and/or adjusting the time sequence position of the response packet in the frame structure;

wherein, when the sending end generates the frame structure adjustment information according to the receiving end state of the receiving end which has established connection, when the last communication state indication information indicates that at least one second receiving end has not established connection, the current communication state indication information indicates that the second receiving end has successfully established connection, and the generated radio frequency packet adjustment information indicates that a response packet corresponding to the second receiving end is added in the frame structure,

deleting retransmission packets which are not less than the radio frequency bandwidth occupied by all the second receiving end response packets in the frame structure by using the received radio frequency packet adjustment information, and/or adjusting the time sequence position of the transmission response packets in the frame structure;

when the sending end generates the frame structure adjustment information according to the receiving end state of whether the receiving end successfully receives the corresponding data packet, the frame structure used for adjusting by using the frame structure adjustment information specifically includes:

2. The method of claim 1, wherein the communication status indication information further indicates a channel status; when the sending end generates the frame structure adjustment information according to the acquired channel state of the current channel quality of the communication system,

the frame structure adjustment information further includes relative position adjustment information indicating a timing position of a period for performing frame structure hopping with respect to a period for transmitting the corresponding frame structure adjustment information;

the adjusting the frame structure used by the frame structure adjustment information and performing data communication with the sending end according to the adjusted frame structure specifically includes:

3. The method according to claim 1, wherein when the sending end generates the frame structure adjustment information according to the receiving end status of whether the receiving end successfully receives the corresponding data packet, the performing data communication with the sending end according to the adjusted frame structure specifically comprises:

and in each frame period, adjusting the used frame structure according to the frame structure adjustment information consistent with the sending end, receiving the radio frequency packet from the sending end according to the adjusted frame structure, and sending a response packet to the sending end.

4. The method according to any one of claims 1 to 3, further comprising:

when the current frame from the sending end comprises a retransmission packet, if no data packet is lost in the retransmission range of the current frame according to the statistics of the received radio frequency packet, the retransmission packet from the sending end is refused to be received; or,

5. The method according to any one of claims 1 to 3, wherein the adjusting the used frame structure by using the frame structure adjustment information and performing data communication with the sending end according to the adjusted frame structure specifically comprises:

retransmitting a response packet to the sending end for many times for each frame of radio frequency packet received from the sending end; when a plurality of receiving ends exist, retransmitting the response packet of each receiving end to the sending end for many times according to the set time sequence position, wherein two adjacent response packets in the set time sequence position belong to different receiving ends.

6. The method according to claim 4, wherein the receiving the frame structure adjustment information from the transmitting end specifically includes:

receiving frame structure adjustment information issued by a sending end through a data packet, wherein the frame structure adjustment information is carried in the data packet; or, receiving frame structure adjustment information issued by a sending end through a control packet, where the control packet is generated according to the frame structure adjustment information.

7. The method according to claim 5, wherein the receiving the frame structure adjustment information from the transmitting end specifically includes: