CN105722250B - A kind of transmission of data and Reverse Turning Control method, equipment and system - Google Patents

A kind of transmission of data and Reverse Turning Control method, equipment and system Download PDF

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Publication number
CN105722250B
CN105722250B CN201410729193.4A CN201410729193A CN105722250B CN 105722250 B CN105722250 B CN 105722250B CN 201410729193 A CN201410729193 A CN 201410729193A CN 105722250 B CN105722250 B CN 105722250B
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mobile unit
audio transmission
source device
reversed
reversed audio
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CN105722250A (en
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张勇浩
张彪
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China Mobile Communications Group Co Ltd
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China Mobile Communications Group Co Ltd
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Abstract

The invention discloses a kind of transmission of data and Reverse Turning Control method, equipment and system, in the present case, source device can carry out the negotiation of reversed audio transmission ability with mobile unit, and after determining that the two supports reversed audio transmission ability, negotiate reversed audio transmission port with mobile unit and carry out the transmission of audio data using the reversed audio transmission port and mobile unit negotiated, to realize reversed or even two-way audio data the transmission between mobile unit and source device.In addition, in the present case, source device can be also carried to each device broadcasts around for indicating itself to support the reversed input capability message of the mark of onboard control device type, with by each mobile unit according to the reversed input capability message determine source device support onboard control device type when, Reverse Turning Control is carried out to source device by way of sending the Reverse Turning Control universal information for carrying corresponding vehicle-mounted Reverse Turning Control information to source device, to realize mobile unit to the Reverse Turning Control of source device.

Description

A kind of transmission of data and Reverse Turning Control method, equipment and system
Technical field
The present invention relates to multi-screen interactive technical field more particularly to a kind of data transmission with Reverse Turning Control method, equipment and System.
Background technique
Multi-screen interactive technology, which is referred to, (to be set up by initiations such as Sony, Intel, Microsofts based on DLNA, aims to solve the problem that individual The interconnection technology of wireless network and cable network including PC, consumer appliances, mobile device) agreement, IGRS protocol or Miracast (also known as WI-FI Display, i.e., wireless with screen) agreement etc., is connected by WIFI (Wireless Fidelity) network It connects, in different multimedia terminal, such as between mobile phone, PAD, TV progress multimedia content (such as audio, video or picture) Transmission, parsing are shown or the sequence of operations such as control, with the skill of shown content shared simultaneously in different platform equipment Art.
In simple terms, corresponding connection conversion can be achieved by multi-screen interactive technology, between the screen of distinct device, such as Film on mobile phone can play on TV, and the picture on plate can be shared on TV, and the content on computer can project to TV etc., that is, by multi-screen interactive technology, it can be achieved that promptly transmitting picture, audio or video etc. between each relevant device, because This, multi-screen interactive technology is widely used in the data transmission of each equipment room.
But current multi-screen interactive technology (such as Miracast technology) does not usually support following vehicular applications scene: Such as, by each application on the source devices such as control button (including knob, key etc.) operating handset on mobile unit, alternatively, The source devices, anti-between the source devices such as mobile unit and mobile phone to realize such as from mobile unit reverse transfer audio data to mobile phone To so the transmission of two-way audio data etc., the usage scenario so as to cause multi-screen interactive technology is greatly limited.
Summary of the invention
The embodiment of the invention provides a kind of transmission of data and Reverse Turning Control method, equipment and system, to solve at present Existing multi-screen interactive technology do not support reversed or even two-way audio data transmission between mobile unit and source device and The problem of mobile unit is to the vehicular applications scene such as Reverse Turning Control of source device is not supported.
The embodiment of the invention provides a kind of data transmission methods, comprising:
Source device and mobile unit carry out the negotiation of reversed audio transmission ability；
If it is determined that itself and the mobile unit support reversed audio transmission ability, then negotiate to use with the mobile unit In transmission audio data reversed audio transmission port, and using negotiate reversed audio transmission port and the mobile unit into The transmission of row audio data.
Further, the embodiment of the invention also provides another data transmission methods, comprising:
Mobile unit and source device carry out the negotiation of reversed audio transmission ability；
If it is determined that itself and the source device support reversed audio transmission ability, then negotiate with the source device for passing The reversed audio transmission port of transfer audio data, and audio is carried out using the reversed audio transmission port and the source device negotiated The transmission of data.
Further, the embodiment of the invention provides a kind of Reverse Turning Control methods, comprising:
Source device is then carried to each device broadcasts around for indicating if it is determined that itself support onboard control device type The source device supports the reversed input capability message of the mark of onboard control device type；
If receiving the Reverse Turning Control universal information for carrying vehicle-mounted Reverse Turning Control information that any mobile unit is sent, Corresponding control operation is executed according to the vehicle-mounted Reverse Turning Control information carried in the Reverse Turning Control universal information.
Further, the embodiment of the invention also provides another Reverse Turning Control methods, comprising:
Mobile unit receives the reversed input capability message of source device broadcast；
If it is determined that being carried in the reversed input capability message for indicating that the source device supports onboard control device The mark of type, and determine that itself need to carry out Reverse Turning Control to the source device, then it is carried to source device transmission vehicle-mounted The Reverse Turning Control universal information of Reverse Turning Control information, to indicate that the source device executes phase according to the vehicle-mounted Reverse Turning Control information The control operation answered.
Further, the embodiment of the invention also provides a kind of terminal devices, comprising:
Capability negotiation unit, for carrying out the negotiation of reversed audio transmission ability with mobile unit；
Port negotiation unit, for if it is determined that the terminal device and the mobile unit support reversed audio transmission energy Power then negotiates the reversed audio transmission port for being used for transmission audio data with the mobile unit, and utilizes the reversed sound negotiated Frequency transmission port and the mobile unit carry out the transmission of audio data.
Further, the embodiment of the invention also provides a kind of mobile units, comprising:
Capability negotiation unit, for carrying out the negotiation of reversed audio transmission ability with source device；
Port negotiation unit, for if it is determined that the mobile unit and the source device support reversed audio transmission energy Power then negotiates the reversed audio transmission port for being used for transmission audio data with the source device, and utilizes the reversed audio negotiated Transmission port and the source device carry out the transmission of audio data.
Further, the embodiment of the invention also provides another terminal devices, comprising:
Transmission unit is used for if it is determined that terminal device support onboard control device type, then wide to each equipment around It broadcasts and carries for indicating that the terminal device supports the reversed input capability message of the mark of onboard control device type；
Receiving unit, the Reverse Turning Control for carrying vehicle-mounted Reverse Turning Control information for receiving mobile unit transmission general disappear Breath；
Processing unit, for being executed according to the vehicle-mounted Reverse Turning Control information carried in the Reverse Turning Control universal information Corresponding control operation.
Further, the embodiment of the invention also provides another mobile units, comprising:
Receiving unit, for receiving the reversed input capability message of source device broadcast；
Processing unit, for if it is determined that being carried in the reversed input capability message for indicating that the source device is supported The mark of onboard control device type and determine that itself need to carry out Reverse Turning Control to the source device, then trigger transmission unit to institute It states source device and sends the Reverse Turning Control universal information for carrying vehicle-mounted Reverse Turning Control information；
Transmission unit, for the triggering according to the processing unit, the transmission of Xiang Suoshu source device carries vehicle-mounted reversed control The Reverse Turning Control universal information of information processed, to indicate that the source device executes corresponding control according to the vehicle-mounted Reverse Turning Control information System operation.
Further, the embodiment of the invention also provides a kind of data transmission systems, including including source device and vehicle-mounted Equipment, in which:
The source device, for carrying out the negotiation of reversed audio transmission ability with the mobile unit, and, however, it is determined that from Body and the mobile unit support reversed audio transmission ability, then are used for transmission audio data with mobile unit negotiation Reversed audio transmission port, and utilize the biography of the reversed audio transmission port negotiated and mobile unit progress audio data It is defeated；
The mobile unit, for carrying out the negotiation of reversed audio transmission ability with the source device, and, however, it is determined that from Body and the source device support reversed audio transmission ability, then are used for transmission the reversed of audio data with source device negotiation Audio transmission port, and utilize the transmission of the reversed audio transmission port negotiated and source device progress audio data.
Further, the embodiment of the invention also provides a kind of revertive control system, including source device and mobile unit, Wherein:
The source device is used for if it is determined that itself supports onboard control device type, then to each device broadcasts carrying around Have for indicating that the source device supports the reversed input capability message of the mark of onboard control device type；And it if receives The Reverse Turning Control universal information for carrying vehicle-mounted Reverse Turning Control information sent to any mobile unit, then according to the reversed control The vehicle-mounted Reverse Turning Control information carried in universal information processed executes corresponding control operation；
The mobile unit, for receiving the reversed input capability message of the source device broadcast, and if it is determined that it is described anti- The mark for indicating the source device support onboard control device type is carried into input capability message and determines itself Reverse Turning Control need to be carried out to the source device, then send the Reverse Turning Control for carrying vehicle-mounted Reverse Turning Control information to the source device Universal information, to indicate that the source device executes corresponding control operation according to the vehicle-mounted Reverse Turning Control information.
The present invention has the beneficial effect that:
The embodiment of the invention provides a kind of data transmission methods and Reverse Turning Control method, equipment and system, in the present invention In technical solution described in embodiment, source device can carry out the negotiation of reversed audio transmission ability with mobile unit, and determine two After person supports reversed audio transmission ability, the reversed audio transmission port of audio data is used for transmission simultaneously with mobile unit negotiation The transmission that audio data is carried out using the reversed audio transmission port of negotiation and mobile unit, to realize mobile unit and source Reversed or even two-way audio data transmission between equipment solves existing multi-screen interactive technology and does not support mobile unit and source The problem of vehicular applications scene of reversed or even two-way audio data transmission between equipment, extend making for multi-screen interactive technology Use scene.
In addition, source device can also support vehicle-mounted control to set determining itself in the technical solution described in the embodiment of the present invention When standby type, carry to each device broadcasts around for indicating itself to support the reversed defeated of the mark of onboard control device type Enter capabilities message, according to the reversed input capability message, to determine that source device supports vehicle-mounted control by each mobile unit around When control equipment type, the side of the Reverse Turning Control universal information of corresponding vehicle-mounted Reverse Turning Control information is carried by sending to source device Formula carries out Reverse Turning Control to source device and it is mutual to solve existing multi-screen to realize mobile unit to the Reverse Turning Control of source device Dynamic technology does not support the problem of vehicular applications scene of the mobile unit to the Reverse Turning Control of source device, and it is mutual to have further expanded multi-screen The usage scenario of dynamic technology.
Detailed description of the invention
To describe the technical solutions in the embodiments of the present invention more clearly, make required in being described below to embodiment Attached drawing is briefly introduced, it should be apparent that, drawings in the following description are only some embodiments of the invention, for this For the those of ordinary skill in field, without creative efforts, it can also be obtained according to these attached drawings other Attached drawing.
Fig. 1 show the flow diagram of data transmission method described in the embodiment of the present invention one；
Fig. 2 show the flow diagram of data transmission method described in the embodiment of the present invention two；
Fig. 3 show the flow diagram of data transmission method described in the embodiment of the present invention three；
Fig. 4 show the flow diagram of Reverse Turning Control method described in the embodiment of the present invention four；
Fig. 5 show the flow diagram of Reverse Turning Control method described in the embodiment of the present invention five；
Fig. 6 show the flow diagram of Reverse Turning Control method described in the embodiment of the present invention six；
Fig. 7 show the flow diagram of terminal device described in the embodiment of the present invention seven；
Fig. 8 show the flow diagram of mobile unit described in the embodiment of the present invention seven；
Fig. 9 show the flow diagram of another kind terminal device described in the embodiment of the present invention seven；
Figure 10 show the flow diagram of another kind mobile unit described in the embodiment of the present invention seven；
Figure 11 show the structural schematic diagram of data transmission system described in the embodiment of the present invention seven；
Figure 12 show the structural schematic diagram of revertive control system described in the embodiment of the present invention seven.
Specific embodiment
The embodiment of the invention provides a kind of data transmission method and Reverse Turning Control method, equipment and system, the present invention is real It applies in the example technical solution, source device can carry out the negotiation of reversed audio transmission ability with mobile unit, and determine the two After supporting reversed audio transmission ability, negotiate the reversed audio transmission port for being used for transmission audio data and benefit with mobile unit The transmission of audio data is carried out with the reversed audio transmission port of negotiation and mobile unit, is set to realize mobile unit with source Reversed or even two-way audio data transmission between standby, solves existing multi-screen interactive technology, as Miracast technology is not propped up The problem of holding the vehicular applications scene of the reversed or even two-way audio data transmission between mobile unit and source device, extends more Shield the usage scenario of interaction technique.
In addition, source device can also support vehicle-mounted control to set determining itself in the technical solution described in the embodiment of the present invention When standby type, carry to each device broadcasts around for indicating itself to support the reversed defeated of the mark of onboard control device type Enter capabilities message, according to the reversed input capability message, to determine that source device supports vehicle-mounted control by each mobile unit around When control equipment type, the side of the Reverse Turning Control universal information of corresponding vehicle-mounted Reverse Turning Control information is carried by sending to source device Formula carries out Reverse Turning Control to source device and it is mutual to solve existing multi-screen to realize mobile unit to the Reverse Turning Control of source device Dynamic technology, the problem of not supporting vehicular applications scene of the mobile unit to the Reverse Turning Control of source device such as Miracast technology, into One step extends the usage scenario of multi-screen interactive technology.
To make the objectives, technical solutions, and advantages of the present invention clearer, below in conjunction with attached drawing to the present invention make into It is described in detail to one step, it is clear that described embodiments are only a part of the embodiments of the present invention, rather than whole implementation Example.Based on the embodiments of the present invention, obtained by those of ordinary skill in the art without making creative efforts All other embodiment, shall fall within the protection scope of the present invention.
Embodiment one:
In order to support the reversed or even two-way audio data between mobile unit and source device to transmit, the embodiment of the present invention one A kind of data transmission method is provided, as shown in Figure 1, its process signal for data transmission method described in the embodiment of the present invention one Figure, the method can comprise the following steps that
Step 101: source device carries out the negotiation of reversed audio transmission ability with mobile unit.
Specifically, by taking Miracast technology as an example, source device and mobile unit can standardize in existing Miracast1.0 and determine The capability negotiation stage of justice carries out the negotiation of reversed audio transmission ability, also, referring to involved by Miracast1.0 specification Source and sink between negotiate respective extension ability process it is found that the specific negotiation of the reversed audio transmission ability is flowed Journey can include:
Source device sends to the mobile unit and carries the first extended capability negotiation message of first identifier, and described first Mark is for indicating whether the source device has reversed audio transmission ability, to be expanded by the mobile unit according to described first The extended capability that the first identifier and the mobile unit carried in exhibition capability negotiation message has itself, judges institute It states source device and whether the mobile unit supports reversed audio transmission ability；And it is returned if receiving the mobile unit That returns is used to indicate that the source device and the mobile unit to support the response message of reversed audio transmission ability, it is determined that institute State source device and the mobile unit support reversed audio transmission ability, otherwise, it is determined that the source device with it is described vehicle-mounted Equipment not supports reversed audio transmission ability；
Alternatively,
Receive the second extended capability negotiation message for carrying second identifier that the mobile unit is sent, second mark Know for indicating whether the mobile unit has reversed audio transmission ability；If according to the second extended capability negotiation message The second identifier of middle carrying determines that the mobile unit supports reversed audio transmission ability, and according to the source device itself The extended capability being had, which determines, itself also supports reversed audio transmission ability, it is determined that the source device and the mobile unit Support reversed audio transmission ability；If being determined according to the second identifier carried in the second extended capability negotiation message The mobile unit does not support reversed audio transmission ability, or, being determined according to the extended capability that the source device has itself Reversed audio transmission ability itself is not supported, it is determined that the source device and the mobile unit not support reversed audio to pass Movement Capabilities.
That is, source device can be used when carrying out the negotiation of reversed audio transmission ability with mobile unit by vehicle-mounted Equipment executes the judgment mode for the operation for judging whether the two supports reversed audio transmission ability, can also be used and is set by the source The standby judgment mode for executing the operation for judging whether the two supports reversed audio transmission ability, the embodiment of the present invention do not make this Any restriction.
It is further to note that source device is before the negotiation for carrying out reversed audio transmission ability with mobile unit, it can It first determines whether itself whether support reversed audio transmission ability, after determining that itself supports reversed audio transmission ability, then executes Subsequent reversed audio transmission capability negotiation procedure, the embodiment of the present invention do not repeat this.
Explanation in need again, by taking Miracast technology as an example, source device is carrying out reversed audio biography with mobile unit Before the negotiation of Movement Capabilities, corresponding equipment discovery process usually can be also first carried out.Specifically, unlike the prior art, In the equipment of the embodiment of the present invention discovery phase, source device can be in the wide of equipment discovery phase with terminal device (such as mobile unit) It broadcasts and increases relevant information in message or broadcast frame to identify and oneself whether support reversed audio transmission ability, so as to corresponding end End equipment or source device have setting for respective opposed audio transmission ability around capable of finding according to the increased relevant information Standby, the embodiment of the present invention does not repeat this.
Further, it should be noted that by taking Miracast technology as an example, the first, second extended capability negotiation disappears Cease the WFD Extended for being used to negotiate the extended capability that source and sink are supported by existing Miracast1.0 in being standardized Capabilities message.That is, in order to be compatible with existing Miracast1.0 specification, so that the modification carried out to it is most Measure it is small, in embodiment of the present invention, can be standardized in Miracast1.0 defined in be used to negotiate source and sink is propped up Carry in the WFD Extended Capabilities message for the extended capability held accordingly, for whether indicating relevant device Identification information with reversed audio transmission ability, such as first identifier or second identifier.
Specifically, WFD Extended Capabilities Bitmap (WFD Extended as shown in Table 1 Bit map corresponding to Capabilities message) it is found that disappearing corresponding to WFD Extended Capabilities message Cease in domain there are multiple still not used setting reserved bits (such as 6-15, i.e., corresponding bit identification for 6-15 reserved bit), Accordingly it is contemplated that being extended to one (such as the 6th) in above-mentioned setting reserved bit, to be passed as reversed audio data Movement Capabilities support position.That is, the first identifier can specifically pass through message field corresponding to the first extended capability negotiation message In the specific value of the setting reserved bit indicate；The second identifier specifically can negotiate to disappear by second extended capability The specific value of the setting reserved bit in corresponding message field is ceased to indicate, the embodiment of the present invention does not repeat this.
Table 1:WFD Extended Capabilities Bitmap
Further, in embodiment of the present invention, the reversed audio data transmittability supports that the definition of position can Other abilities as corresponding to extended capability negotiation message as shown in Table 1 support position, 0b0 can indicate not supporting reversed sound It keeps pouring in Movement Capabilities (i.e. Not supported), 0b1 can indicate to support reversed audio transmission ability (i.e. supported), the present invention Embodiment does not repeat this.Certainly it should be noted that other values (such as 1 or 0) can be used also to indicate whether to support Reversed audio transmission ability, the embodiment of the present invention are not limited in any way this.
Step 102: the source device if it is determined that itself and the mobile unit support reversed audio transmission ability, then with The mobile unit negotiates the reversed audio transmission port for being used for transmission audio data, and utilizes the reversed audio transmission end negotiated Mouth carries out the transmission of audio data with the mobile unit.
Specifically, by taking Miracast technology as an example, the source device can be existing with the mobile unit Miracast1.0 standardizes the negotiation that defined capability negotiation stage carries out reversed audio transmission port, also, reference When negotiating to transmit audio, video data to sink from source between involved source and sink in Miracast1.0 specification The process of used audio, video data port is it is found that the specific negotiation process of the reversed audio transmission port can be such as step Described in A1-A3:
A1: Xiang Suoshu mobile unit of step sends parameter acquisition request message, carries in the parameter acquisition request message There is the backward end slogan for negotiating reversed audio transmission port numbers to negotiate parameter field, it is desirable that mobile unit is obtained in the response parameter It takes and negotiates to fill in corresponding reversed audio transmission port numbers in parameter field in the backward end slogan when request message.
Wherein, the parameter acquisition request message can be the category for being used to inquire equipment that source device is sent to mobile unit Property and tenability M3 request message, carry in the parameter acquisition request message for negotiating reversed audio transmission end The backward end slogan of slogan, which negotiates parameter field, can be the wfd-reverse- newly increased on the basis of Miracast1.0 specification Audio-port parameter field, specifically, the definition of wfd-reverse-audio-port parameter field can be with are as follows:
Wfd-reverse-audio-port=" wfd-reverse-audio-port: " SP profile SP rtp- The wfd-reverse-audio-port parameter field of port SP mode CRLF//i.e. specifically may include profile (configuration) domain, (live transmission protocol port) domain rtp-port and mode (mode) domain etc.；
Profile=" RTP/AVP/UDP；Unicast " // i.e. corresponding configuration domain information can be for by TCP, (transmission is controlled Agreement processed) transmission RTP packet, alternatively, unicast etc.；
Rtp-port=IPPORT；UDP port//i.e. corresponding port domain information can for (Internet protocol) port IP or UDP (User Datagram Protocol) port etc.；
Mode=" mode=play " // i.e. corresponding mode domain information can be play (broadcasting) etc..
Step A2: it receives the mobile unit and disappears for the parameter acquisition response that the parameter acquisition request message returns Breath, the parameter obtain in response message and carry the reversed audio transmission port numbers supported added with the mobile unit Backward end slogan negotiates parameter field.
Wherein, the parameter, which obtains response message, can be M3 response message, that is, the mobile unit is to institute It states source device and returns to parameter acquisition response message (the i.e. M3 for being directed to the parameter acquisition request message (i.e. M3 request message) Response message) when, it need to obtain in the wfd-reverse-audio-port parameter field in response message and add in the parameter At least one reversed audio transmission port numbers.
Step A3: response message is obtained according to the parameter, request message, institute is arranged in Xiang Suoshu mobile unit return parameters It states and carries the backward end added with reversed audio transmission port numbers selected by the source device in parameter setting request message Slogan negotiates parameter field, to inform reversed audio transmission port numbers that both described mobile units are negotiated；Wherein, the source is set Standby selected reversed audio transmission port numbers are the reversed audio transmission ends that the source device is supported from the mobile unit Selected by slogan.
Specifically, the parameter setting request message can be M4 request message, and the embodiment of the present invention does not make this It repeats.
So far, the negotiation of the reversed audio transmission port numbers between source device and mobile unit can be realized.
Further, it should be noted that after negotiating reversed audio transmission port numbers, the source device can pass through association The reversed audio transmission port numbers and mobile unit of quotient carry out the transmission of audio data, by taking Miracast technology as an example, specifically Data transmission stream journey can be similar with the data transmission procedure that existing Miracast 1.0 is standardized, and the embodiment of the present invention does not go to live in the household of one's in-laws on getting married to this It states.
In addition, it is necessary to explanation, other than Miracast technology, the embodiment of the present invention could be applicable to other multi-screens Interaction technique, such as the multi-screen interactive technology based on DLNA agreement or IGRS protocol, the embodiment of the present invention do not repeat this.
That is, source device can carry out reversed sound with mobile unit in the technical solution described in the embodiment of the present invention one The negotiation of Movement Capabilities is kept pouring in, and after determining that the two supports reversed audio transmission ability, is used for transmission with mobile unit negotiation The reversed audio transmission port of audio data simultaneously carries out audio data using the reversed audio transmission port and mobile unit negotiated Transmission solved existing to realize reversed or even two-way audio data the transmission between mobile unit and source device Multi-screen interactive technology, as Miracast technology does not support the reversed or even two-way audio data between mobile unit and source device to pass The problem of defeated vehicular applications scene, multi-screen interactive technology is extended, such as the usage scenario of Miracast technology.In addition, this hair The compatible existing multi-screen interactive agreement of technical solution described in bright embodiment, if Miracast1.0 is standardized, improvement is small, also has The advantages that easy to accomplish.
Embodiment two
The embodiment of the present invention two passes data described in the embodiment of the present invention one so that mobile unit is movement execution side as an example Transmission method is further described, as shown in Fig. 2, its process signal for data transmission method described in the embodiment of the present invention two Figure, the method can comprise the following steps that
Step 201: mobile unit carries out the negotiation of reversed audio transmission ability with source device.
Specifically, by taking Miracast technology as an example, the mobile unit can be existing with the source device The capability negotiation stage of Miracast1.0 specification definition carries out the negotiation of reversed audio transmission ability, also, reference Negotiate the process of respective extension ability in Miracast1.0 specification between involved source and sink it is found that described anti- To the specific negotiation process of audio transmission ability can include:
Receive the first extended capability negotiation message for carrying first identifier that the source device is sent, the first identifier For indicating whether the mobile unit has reversed audio transmission ability；If according in the first extended capability negotiation message The first identifier carried determines that the source device supports reversed audio transmission ability, and according to the mobile unit itself institute The extended capability having, which determines, itself also supports reversed audio transmission ability, it is determined that the mobile unit and the source device are equal Support reversed audio transmission ability；If determining institute according to the first identifier carried in the first extended capability negotiation message It states source device and does not support reversed audio transmission ability, or, being determined certainly according to the extended capability that the mobile unit has itself Body does not support reversed audio transmission ability, it is determined that the mobile unit and the source device not support reversed audio transmission Ability；
Alternatively,
The the second extended capability negotiation message for carrying second identifier is sent to the source device, the second identifier is used for Indicate whether the mobile unit has reversed audio transmission ability, to be assisted by the source device according to second extended capability The extended capability that the second identifier and the source device carried in quotient's message has itself, judges the mobile unit Reversed audio transmission ability whether is supported with the source device；And if receive that the source device returns for indicating The mobile unit and the source device support the response message of reversed audio transmission ability, it is determined that the mobile unit with The source device supports reversed audio transmission ability, otherwise, it is determined that the mobile unit is not propped up with the source device Hold reversed audio transmission ability.
That is, mobile unit can be used when carrying out the negotiation of reversed audio transmission ability with source device by vehicle-mounted Equipment executes the judgment mode for the operation for judging whether the two supports reversed audio transmission ability, can also be used and is held by source device Row judges whether the two supports the judgment mode of the operation of reversed audio transmission ability, and the embodiment of the present invention does not make this any It limits.
It is further to note that mobile unit is before the negotiation for carrying out reversed audio transmission ability with source device, it can It first determines whether itself whether support reversed audio transmission ability, after determining that itself supports reversed audio transmission ability, then executes Subsequent reversed audio transmission capability negotiation procedure, the embodiment of the present invention do not repeat this.
Explanation in need again, by taking Miracast technology as an example, mobile unit is carrying out reversed audio biography with source device Before the negotiation of Movement Capabilities, corresponding equipment discovery process usually can be also first carried out.Specifically, unlike the prior art, In the equipment of the embodiment of the present invention discovery phase, mobile unit and source device can be in the broadcast messages or broadcast of equipment discovery phase Increase relevant information in frame to identify and oneself whether support reversed audio transmission ability, so as to corresponding source device or vehicle-mounted sets The standby equipment that can be found surrounding according to the increased relevant information and have respective opposed audio transmission ability, the present invention are implemented Example does not repeat this.
Further, identical as the associated description in the embodiment of the present invention one, by taking Miracast technology as an example, described One, the second extended capability negotiation message can be used to negotiate source in existing Miracast1.0 specification and sink is supported The WFD Extended Capabilities message of extended capability.That is, in order to be compatible with existing Miracast1.0 specification, So that the modification carried out to it is small as far as possible, in embodiment of the present invention, defined use can be standardized in Miracast1.0 It is carried in WFD Extended Capabilities message to negotiate the extended capability that source and sink are supported corresponding , for indicating whether relevant device has the identification information of reversed audio transmission ability, such as first identifier or second identifier.
Specifically, the WFD Extended Capabilities Bitmap as shown in table 1 in embodiment one is it is found that WFD There are multiple still not used setting reserved bit (such as 6- in message field corresponding to Extended Capabilities message 15), accordingly it is contemplated that being extended to one (such as the 6th) in above-mentioned setting reserved bit, as reversed sound Frequency data transmission capabilities support position.That is, the first identifier specifically can be by corresponding to the first extended capability negotiation message Message field in the specific value of the setting reserved bit indicate, such as when the first identifier is for indicating that relevant device does not prop up When holding reversed audio transmission ability, the value of the setting reserved bit can be 0b0, when the first identifier is for indicating relevant device When supporting reversed audio transmission ability, the value of the setting reserved bit can be 0b1；The second identifier can specifically pass through described The specific value of the setting reserved bit in message field corresponding to two extended capability negotiation messages indicates, such as works as described second When mark is for indicating that relevant device does not support reversed audio transmission ability, the value of the setting reserved bit can be 0b0, when described When second identifier is for indicating that relevant device supports reversed audio transmission ability, the value of the setting reserved bit can be 0b1, this hair Bright embodiment does not repeat this.
Step 202: the mobile unit if it is determined that itself and the source device support reversed audio transmission ability, then with The source device negotiates the reversed audio transmission port for being used for transmission audio data, and utilizes the reversed audio transmission port negotiated The transmission of audio data is carried out with the source device.
Specifically, by taking Miracast technology as an example, mobile unit and source device can be in existing Miracast1.0 specification institutes The capability negotiation stage of definition carries out the negotiation of reversed audio transmission port, also, referring to involved by Miracast1.0 specification Used audio, video data port when negotiating to transmit audio, video data to sink from source between the source and sink arrived Process it is found that the specific negotiation process of the reversed audio transmission port can be as described in step B1-B4:
Step B1: the parameter acquisition request message that the source device is sent is received, is taken in the parameter acquisition request message Negotiate parameter field with the backward end slogan for negotiating reversed audio transmission port numbers.
Wherein, the parameter acquisition request message can be M3 request message, and in the parameter acquisition request message The backward end slogan of carrying, which negotiates parameter field, can be wfd-reverse-audio-port parameter field, in addition, the wfd- Being specifically defined described in the correlation that can be found in embodiment one for reverse-audio-port parameter field, it is no longer superfluous to repeat place It states.
Step B2: response is obtained to the source device return parameters according to the parameter acquisition request message received and is disappeared Breath, the parameter obtain in response message and carry the reversed audio transmission port numbers supported added with the mobile unit Backward end slogan negotiates parameter field.
Specifically, it can be M3 response message that the parameter, which obtains response message, and the embodiment of the present invention does not go to live in the household of one's in-laws on getting married to this It states.
Step B3: it receives the source device and is disappeared according to the parameter setting request that parameter acquisition response message is returned It ceases, carries in the parameter setting request message added with the anti-of reversed audio transmission port numbers selected by the source device Negotiate parameter field to port numbers；Wherein, reversed audio transmission port numbers selected by the source device are the source devices from institute Selected by stating in the reversed audio transmission port numbers that mobile unit is supported.
Specifically, the parameter setting request message can be M4 request message, and the embodiment of the present invention does not make this It repeats.
Step B4: according to the reversed audio transmission port numbers carried in the parameter setting request message, it is determining with it is described The reversed audio transmission port numbers that source device is negotiated.
So far, the negotiation of reversed audio transmission port numbers can be realized.
Further, it should be noted that after negotiating reversed audio transmission port numbers, the mobile unit can pass through The reversed audio transmission port numbers negotiated carry out the transmission of audio data with corresponding source device, by taking Miracast technology as an example, Specific data transmission stream journey can be similar with the data transmission procedure that existing Miracast 1.0 is standardized, and the embodiment of the present invention is to this It does not repeat.
That is, mobile unit can carry out reversed sound with source device in the technical solution described in the embodiment of the present invention two The negotiation of Movement Capabilities is kept pouring in, and after determining that the two supports reversed audio transmission ability, is used for transmission sound with source device negotiation The reversed audio transmission port of frequency evidence and the biography that audio data is carried out using the reversed audio transmission port and source device negotiated It is defeated, to realize reversed or even two-way audio data the transmission between mobile unit and source device, solve existing multi-screen Interaction technique, as Miracast technology does not support the reversed or even two-way audio data between mobile unit and source device to transmit The problem of vehicular applications scene, extends multi-screen interactive technology, such as the usage scenario of Miracast technology.In addition, the present invention is real The compatible existing multi-screen interactive agreement of the example technical solution is applied, if Miracast1.0 is standardized, improvement is small, also has and is easy The advantages that realization.
Embodiment three
The embodiment of the present invention three to the embodiment of the present invention one or is implemented so that source device and mobile unit interaction execute as an example Data transmission method described in example two is further described, as shown in figure 3, it is the transmission of data described in the embodiment of the present invention three The flow diagram of method, the method can comprise the following steps that
Step 301: source device sends the first extended capability negotiation message for carrying first identifier to mobile unit, described First identifier is for indicating whether the source device has reversed audio transmission ability.
Wherein, by taking Miracast technology as an example, the first extended capability negotiation message can advise for existing Miracast1.0 It is used to negotiate the WFD Extended Capabilities message for the extended capability that source and sink are supported in model.Also, In order to be compatible with existing Miracast1.0 specification, so that the modification carried out to it is small as far as possible, in embodiment of the present invention, The first identifier can specifically pass through the setting reserved bit in message field corresponding to the first extended capability negotiation message Specific value indicates that such as when the first identifier, which is used for, indicates that relevant device does not support reversed audio transmission ability, this sets The value for determining reserved bit can be 0b0, should when the first identifier is for indicating that relevant device supports reversed audio transmission ability The value for setting reserved bit can be 0b1, and the embodiment of the present invention does not repeat this.
Step 302: mobile unit receives the first extended capability negotiation message, and is assisted according to first extended capability Whether the first identifier carried in quotient's message and extended capability possessed by itself determine both source device and mobile unit Reversed audio transmission ability is supported, if so, 303 are thened follow the steps, if it is not, can then return to source device for indicating that the source is set The standby response message that reversed audio transmission ability is not supported with the mobile unit, so that the source device is according to the sound Message is answered, this reversed audio transmission capability negotiation process is terminated.
Step 303: mobile unit is returned to source device for indicating that the source device and the mobile unit are supported instead To the response message of audio transmission ability.
So far, the negotiation of the reversed audio transmission ability between mobile unit and source device can be realized.
Further, however, it is determined that source device and mobile unit support reversed audio transmission ability, then continue to execute following Step is to carry out the negotiation of reversed audio transmission port:
Step 304: source device sends parameter acquisition request message to mobile unit, takes in the parameter acquisition request message Negotiate parameter field with the backward end slogan for negotiating reversed audio transmission port numbers.
Step 305: mobile unit receives the parameter acquisition request message, and according to the parameter acquisition request message to The source device return parameters obtain response message, and the parameter, which obtains, to be carried in response message added with the mobile unit The backward end slogan for the reversed audio transmission port numbers supported negotiates parameter field.
Step 306: source device obtains response message, the setting request of Xiang Suoshu mobile unit return parameters according to the parameter Message is carried added with reversed audio transmission port numbers selected by the source device in the parameter setting request message Backward end slogan negotiates parameter field；Wherein, reversed audio transmission port numbers selected by the source device be the source device from Selected by the reversed audio transmission port numbers that the mobile unit is supported.
Step 307: mobile unit receives the parameter setting request message, and according in the parameter setting request message The reversed audio transmission port numbers carried, the determining reversed audio transmission port numbers negotiated with the source device.
So far, the negotiation of reversed audio transmission port numbers can be realized.
Further, it should be noted that after negotiating reversed audio transmission port numbers, the source device and the vehicle Carry equipment can reversed audio transmission port numbers through consultation carry out the transmission of audio data, by taking Miracast technology as an example, tool The data transmission stream journey of body can with existing Miracast 1.0 standardize data transmission procedure it is similar, the embodiment of the present invention to this not It repeats.
In addition, it is necessary to explanation, source device when carrying out the negotiation of reversed audio transmission ability with mobile unit, in addition to It can be used and judge whether the two supports reversed audio transmission by mobile unit execution described in 301~step 304 of above-mentioned steps Except the judgment mode of the operation of ability, it can also be used and judge whether the two supports reversed audio to pass by source device execution The judgment mode of the operation of Movement Capabilities, at this point, the negotiation process of corresponding reversed audio transmission ability can comprise the following steps that
Step S1: source device receives the second extended capability negotiation message for carrying second identifier that mobile unit is sent, The second identifier is for indicating whether the mobile unit has reversed audio transmission ability.
Wherein, by taking Miracast technology as an example, the second extended capability negotiation message can advise for existing Miracast1.0 It is used to negotiate the WFD Extended Capabilities message for the extended capability that source and sink are supported in model.Also, In order to be compatible with existing Miracast1.0 specification, so that the modification carried out to it is small as far as possible, in embodiment of the present invention, The second identifier can specifically pass through the setting reserved bit in message field corresponding to the second extended capability negotiation message Specific value indicates that such as when the second identifier, which is used for, indicates that relevant device does not support reversed audio transmission ability, this sets The value for determining reserved bit can be 0b0, should when the second identifier is for indicating that relevant device supports reversed audio transmission ability The value for setting reserved bit can be 0b1, and the embodiment of the present invention does not repeat this.
Step S2: source device is according to the second identifier carried in the second extended capability negotiation message and itself is had Some extended capabilities both determines whether to support reversed audio transmission ability, if so, then follow the steps S3, if it is not, then can be to Mobile unit is returned for indicating that the source device and the mobile unit not support the response of reversed audio transmission ability Message, and terminate this reversed audio transmission capability negotiation process.
Step S3: source device is returned to mobile unit for indicating that the mobile unit and the source device are supported reversely The response message of audio transmission ability, to complete the negotiation of this reversed audio transmission ability.
That is, source device can carry out reversed sound with mobile unit in the technical solution described in the embodiment of the present invention three The negotiation of Movement Capabilities is kept pouring in, and after determining that the two supports reversed audio transmission ability, is used for transmission with mobile unit negotiation The reversed audio transmission port of audio data simultaneously carries out audio data using the reversed audio transmission port and mobile unit negotiated Transmission solved existing to realize reversed or even two-way audio data the transmission between mobile unit and source device Multi-screen interactive technology, as Miracast technology does not support the reversed or even two-way audio data between mobile unit and source device to pass The problem of defeated vehicular applications scene, multi-screen interactive technology is extended, such as the usage scenario of Miracast technology.In addition, this hair The compatible existing multi-screen interactive agreement of technical solution described in bright embodiment, if Miracast1.0 is standardized, improvement is small, also has The advantages that easy to accomplish.
Example IV
In order to support mobile unit to the Reverse Turning Control of source device, the embodiment of the present invention four provides a kind of Reverse Turning Control side Method, as shown in figure 4, its flow diagram for Reverse Turning Control method described in the embodiment of the present invention four, the method may include with Lower step:
Step 401: source device is then carried to each device broadcasts around if it is determined that itself support onboard control device type For indicating that the source device supports the reversed input capability message of the mark of onboard control device type.
Wherein, described for indicating that the source device supports that the mark of onboard control device type can be positioned at described reversed defeated Enter in the type field of capabilities message.Specifically, by taking Miracast technology as an example, the reversed input capability message be can be Wfd-uibc-capability message defined in Miracast1.0 specification, its type field can be inp-type.
That is, by taking Miracast technology as an example, in order to be compatible with existing Miracast1.0 specification so as to its institute into Capable modification is small as far as possible, in embodiment of the present invention, can by way of modifying wfd-uibc-capability message, Increase corresponding onboard control device type in type field corresponding to it, so that sink can be according to the wfd- Whether carried in uibc-capability message for indicating that the source device supports the mark of vehicle-mounted Reverse Turning Control device type Know, to determine whether source device supports onboard control device type.
Specifically, it has been added in original domain inp-type of wfd-uibc-capability message supported reversed Control device type, such as " Keyboard ", " Mouse ", " SingleTouch ", " MultiTouch ", " Joystick ", " Camera ", " Gesture " or " RemoteControl " etc. can newly be added in the domain inp-type on this basis " Carkit " or other mark for marking source devices relevant to onboard control device type support onboard control device type, this Inventive embodiments do not repeat this.
Step 402: if it is logical to receive the Reverse Turning Control for carrying vehicle-mounted Reverse Turning Control information that any mobile unit is sent With message, then corresponding control behaviour is executed according to the vehicle-mounted Reverse Turning Control information carried in the Reverse Turning Control universal information Make.
Wherein, by taking Miracast technology as an example, the Reverse Turning Control universal information can be existing Miracast1.0 specification Defined in Generic input message, in order to compatibility existing Miracast1.0 specification, so that the modification carried out to it It is small as far as possible, in embodiment of the present invention, it can be carried by modifying to Generic input message Corresponding vehicle-mounted Reverse Turning Control information.
Specifically, the message body institute according to Generic input message in existing Miracast1.0 specification shown in table 2 The format that has is it is found that control information corresponding to each input equipment entrained in the Generic input message is usual May include it is described control information corresponding to universal input type identification and it is described control information specifying information description etc., Therefore, correspondingly, the vehicle-mounted Reverse Turning Control information entrained in modified Generic input message generally also can be with Tool including universal input type identification corresponding to the vehicle-mounted Reverse Turning Control information and the vehicle-mounted Reverse Turning Control information Body information description etc., the embodiment of the present invention does not repeat this.
The format that the message body of table 2:Generic input message has
Table 3: each possible general data type defined in existing Miracast1.0 specification
Further, in order to be compatible with existing Miracast1.0 specification, so that the modification carried out to it is small as far as possible, at this It invents in the embodiment, universal input type identification corresponding to the vehicle-mounted Reverse Turning Control information can be located at the reversed control In the universal input type identification domain (i.e. the domain Generic Input Type ID) of universal information processed, the vehicle-mounted Reverse Turning Control The specifying information description of information can be located in the description field (i.e. the domain Describe) of the Reverse Turning Control universal information.Also, into One step, universal input type identification corresponding to the vehicle-mounted Reverse Turning Control information specifically can be general by the Reverse Turning Control Bit identification corresponding to the setting reserved bit in the universal input type identification domain of message indicates.It such as, can be to the Reverse Turning Control The 9th of the universal input type identification domain of universal information sets reserved bit (i.e. corresponding bit identification as 9 reserved bit) and is expanded Exhibition, to make the bit identification corresponding to it to indicate universal input type corresponding to vehicle-mounted Reverse Turning Control information.Specifically, exist When setting reserved bit (i.e. corresponding bit identification as 9 reserved bit) to the described 9th and being extended, the 9th setting can be retained The relevant explanation (i.e. Notes) of position is set as Carkit, and the embodiment of the present invention does not repeat this.
Further, the specifying information description of the vehicle-mounted Reverse Turning Control information may include one of following information or more Kind:
For indicating that the control button type of the vehicle-mounted Reverse Turning Control information is that the control of key or knob (knob) is pressed Key type information, that is, Keytype information；Specifically, when the value of the Keytype is 1, control button type can be indicated It can indicate that control button type is knob when the value of the Keytype is 2 for key；
The control button action message acted for indicating the control button of the vehicle-mounted Reverse Turning Control information, i.e., Keyvalue1 information；Wherein, when the control button type of the vehicle-mounted Reverse Turning Control information is key, the control button Action message can be used for indicating the control button movement of the vehicle-mounted Reverse Turning Control information to press or lifting, at this point, it is specific Value can be 1,2 etc., wherein when value is 1, can indicate to press, value can indicate to lift when being 2；When the vehicle-mounted reversed control When the control button type of information processed is knob, the control button action message can be used for indicating the vehicle-mounted Reverse Turning Control letter The control button movement of breath is rotates clockwise or rotates counterclockwise, at this point, its value can indicate the whole of the angle of knob rotation Number part, also, can indicate to rotate counterclockwise when its value is positive value, it can indicate to revolve clockwise when its value is negative value Turn, that is to say, that at this point, the specific value of Keyvalue1 can depending on the practical rotational case of turn-knob, also, at this point, Keyvalue1 can also indicate the integer angle of rotation, the embodiment of the present invention is to this other than it can indicate whether to rotate clockwise It is not limited in any way；
When the control button type of the vehicle-mounted Reverse Turning Control information is key, for indicating the vehicle-mounted Reverse Turning Control The key information of specific key corresponding to information, i.e. Keycode information；Specifically, the value of Keycode can be according to actually pressing Depending on the value of key, the embodiment of the present invention does not repeat this, such as when the value of Keycode is 1, key 1 is indicated, when it takes When value is 2, key 2 etc. is indicated；Alternatively,
When the control button type of the vehicle-mounted Reverse Turning Control information is knob, for indicating the vehicle-mounted Reverse Turning Control The rotation angle information of specific rotation angle (fractional part for usually rotating angle), i.e. Keyvalue2 corresponding to information； Specifically, the specific value of Keyvalue2 can be depending on the practical rotational case of turn-knob, and the embodiment of the present invention does not appoint this What is limited.
Further, according to foregoing description it is found that in embodiment of the present invention, the vehicle-mounted Reverse Turning Control information Message structure of the specifying information description in the domain Describe specifically can be as shown in the following Table 4:
Table 4: the message structure of the specifying information description of vehicle-mounted Reverse Turning Control information
Correspondingly, general if receiving the Reverse Turning Control for carrying vehicle-mounted Reverse Turning Control information that any mobile unit is sent Message then executes corresponding control behaviour according to the vehicle-mounted Reverse Turning Control information carried in the Reverse Turning Control universal information Make, may include:
According to universal input type identification corresponding to the vehicle-mounted Reverse Turning Control information, the defeated of this Reverse Turning Control is determined Entering device type is mobile unit, and is described according to the specifying information of the vehicle-mounted Reverse Turning Control information, and corresponding control is executed It operates, such as send or stops sending audio data to corresponding mobile unit, or be raised and lowered and be sent to accordingly vehicle-mounted set Sound size of standby audio data etc..
That is, source device can support vehicle-mounted control determining itself in the technical solution described in the embodiment of the present invention four When control equipment type, carry to each device broadcasts around for indicating itself to support the anti-of the mark of onboard control device type To input capability message, according to the reversed input capability message, to determine that source device supports vehicle by each mobile unit around When carrying control device type, the Reverse Turning Control universal information of corresponding vehicle-mounted Reverse Turning Control information is carried by sending to source device Mode Reverse Turning Control carried out to source device solve existing more to realize mobile unit to the Reverse Turning Control of source device Shield interaction technique, as Miracast technology does not support mobile unit asking to the vehicular applications scene of the Reverse Turning Control of source device Topic, has further expanded multi-screen interactive technology, such as the usage scenario of Miracast technology.In addition, skill described in the embodiment of the present invention The compatible existing multi-screen interactive agreement of art scheme, if Miracast1.0 is standardized, improvement is small, also has many advantages, such as easy to accomplish.
Embodiment five
The embodiment of the present invention five is reversely controlled so that mobile unit is movement execution side as an example to described in the embodiment of the present invention four Method processed is further described, as shown in figure 5, its process signal for Reverse Turning Control method described in the embodiment of the present invention five Figure, the method can comprise the following steps that
Step 501: mobile unit receives the reversed input capability message of source device broadcast.
Wherein, when the source device supports onboard control device type, the reversed input capability message, such as wfd- It can be carried in uibc-capability message for indicating that the source device supports the mark of onboard control device type, such as Carkit etc..Specifically, described for indicating that the source device supports the mark of onboard control device type to may generally reside in institute In the type field (i.e. the domain int-type) for stating reversed input capability message.
Step 502: if it is determined that being carried in the reversed input capability message for indicating that it is vehicle-mounted that the source device is supported It controls the mark of device type and determines that itself need to carry out Reverse Turning Control to source device, then carry vehicle to source device transmission The Reverse Turning Control universal information of Reverse Turning Control information is carried, to indicate that the source device is executed according to the vehicle-mounted Reverse Turning Control information Corresponding control operation.
Wherein, the Reverse Turning Control universal information can be Generic input message, and the Generic input The entrained vehicle-mounted Reverse Turning Control information usually may include leading to corresponding to the vehicle-mounted Reverse Turning Control information in message With input type mark and the specifying information description of the vehicle-mounted Reverse Turning Control information etc., the embodiment of the present invention does not go to live in the household of one's in-laws on getting married to this It states.
Specifically, universal input type identification corresponding to the vehicle-mounted Reverse Turning Control information can be located at the Reverse Turning Control In the universal input type identification domain (i.e. the domain Generic Input Type ID) of universal information, the vehicle-mounted Reverse Turning Control letter The specifying information description of breath can be located in the description field (i.e. the domain Describe) of the Reverse Turning Control universal information.Also, into one Step, universal input type identification corresponding to the vehicle-mounted Reverse Turning Control information can specifically disappear by the way that the Reverse Turning Control is general Bit identification corresponding to the setting reserved bit (such as the 9th reserved bit) in the universal input type identification domain of breath indicates that the present invention is real It applies example and this is not repeated.
Further, the specifying information description of the vehicle-mounted Reverse Turning Control information may include one of following information or more Kind:
For indicating that the control button type of the vehicle-mounted Reverse Turning Control information is that the control of key or knob (knob) is pressed Key type information；
The control button action message acted for indicating the control button of the vehicle-mounted Reverse Turning Control information；Wherein, when When the control button type of the vehicle-mounted Reverse Turning Control information is key, the control button action message can be used for indicating described The control button movement of vehicle-mounted Reverse Turning Control information is to press or lift；When the control button class of the vehicle-mounted Reverse Turning Control information When type is knob, the control button action message can be used for indicating that the control button movement of the vehicle-mounted Reverse Turning Control information is It rotates clockwise or rotates counterclockwise；
When the control button type of the vehicle-mounted Reverse Turning Control information is key, for indicating the vehicle-mounted Reverse Turning Control The key information of specific key corresponding to information；Alternatively,
When the control button type of the vehicle-mounted Reverse Turning Control information is knob, for indicating the vehicle-mounted Reverse Turning Control The rotation angle information of specific rotation angle (fractional part for usually rotating angle) corresponding to information.
Further more, the message structure that the specifying information of the vehicle-mounted Reverse Turning Control information describes in the domain Describe specifically may be used As shown in the table 4 in example IV, the embodiment of the present invention does not repeat this.
In the technical solution described in the embodiment of the present invention five, mobile unit can be in the reversed input energy for determining source device broadcast It is carried in power message for indicating that the source device supports the mark of onboard control device type and determination need to set source itself When standby progress Reverse Turning Control, Xiang Suoshu source device sends the Reverse Turning Control universal information for carrying vehicle-mounted Reverse Turning Control information, with Indicate that the source device executes corresponding control operation according to the vehicle-mounted Reverse Turning Control information, to realize mobile unit pair The Reverse Turning Control of source device solves existing multi-screen interactive technology, as Miracast technology does not support mobile unit to source device Reverse Turning Control vehicular applications scene the problem of, multi-screen interactive technology has been further expanded, such as the use of Miracast technology Scene.In addition, the compatible existing multi-screen interactive agreement of technical solution described in the embodiment of the present invention changes if Miracast1.0 is standardized It is small into putting, also have many advantages, such as easy to accomplish.
Embodiment six
The embodiment of the present invention six to the embodiment of the present invention four or is implemented so that source device and mobile unit interaction execute as an example Reverse Turning Control method described in example five is further described, as shown in fig. 6, it is Reverse Turning Control described in the embodiment of the present invention six The flow diagram of method, the method can comprise the following steps that
Step 601: source device is then carried to each device broadcasts around if it is determined that itself support onboard control device type For indicating itself to support the reversed input capability message of the mark of onboard control device type.
Wherein, described for indicating that the source device supports that the mark of onboard control device type can be positioned at described reversed defeated Enter in the type field of capabilities message.
Step 602: mobile unit receives the Reverse Turning Control capabilities message of the source device broadcast, and according to the reversed control What is carried in capabilities message processed is used to indicate that the source device to support the mark of onboard control device type, determines the source device Support vehicle-mounted Reverse Turning Control device type.
Step 603: mobile unit is if it is determined that itself (need to exist and reversely be controlled to source device progress Reverse Turning Control The demand of system), then the Reverse Turning Control universal information for carrying corresponding vehicle-mounted Reverse Turning Control information is sent to the source device.
Wherein, the vehicle-mounted Reverse Turning Control information may include universal input class corresponding to the vehicle-mounted Reverse Turning Control information The specifying information description of type mark and the vehicle-mounted Reverse Turning Control information.And corresponding to the vehicle-mounted Reverse Turning Control information Universal input type identification can be located in the universal input type identification domain of the Reverse Turning Control universal information, described vehicle-mounted reversed The specifying information description for controlling information can be located in the description field of the Reverse Turning Control universal information.
Further more, according to the associated description of example IV or embodiment five restrain, the vehicle-mounted Reverse Turning Control information it is specific Information description may include one of following information or a variety of:
For indicating that the control button type of the vehicle-mounted Reverse Turning Control information is the control button type of key or knob Information；
The control button action message acted for indicating the control button of the vehicle-mounted Reverse Turning Control information；Wherein, when When the control button type of the vehicle-mounted Reverse Turning Control information is key, the control button action message is for indicating the vehicle The control button movement of Reverse Turning Control information is carried to press or lifting；When the control button type of the vehicle-mounted Reverse Turning Control information When for knob, the control button action message is used to indicate that the control button movement of the vehicle-mounted Reverse Turning Control information to be up time Needle rotation or counterclockwise rotation；
When the control button type of the vehicle-mounted Reverse Turning Control information is key, for indicating the vehicle-mounted Reverse Turning Control The key information of specific key corresponding to information；Or,
When the control button type of the vehicle-mounted Reverse Turning Control information is knob, for indicating the vehicle-mounted Reverse Turning Control The rotation angle information of specific rotation angle corresponding to information.
Step 604: source device is general according to the Reverse Turning Control for carrying vehicle-mounted Reverse Turning Control information that mobile unit is sent Message executes corresponding control and operates, and such as sends or stops sending audio data to corresponding mobile unit, or raising or drop The sound size etc. of the low audio data for being sent to corresponding mobile unit.
Specifically, the source device can the universal input type identification according to corresponding to the vehicle-mounted Reverse Turning Control information, The input equipment type for determining this Reverse Turning Control is mobile unit, and according to the specifying information of the vehicle-mounted Reverse Turning Control information Description executes corresponding control operation.
That is, source device can support vehicle-mounted control determining itself in the technical solution described in the embodiment of the present invention six When control equipment type, carry to each device broadcasts around for indicating itself to support the anti-of the mark of onboard control device type To input capability message, according to the reversed input capability message, to determine that source device supports vehicle by each mobile unit around When carrying control device type, the Reverse Turning Control universal information of corresponding vehicle-mounted Reverse Turning Control information is carried by sending to source device Mode Reverse Turning Control carried out to source device solve existing more to realize mobile unit to the Reverse Turning Control of source device Shield interaction technique, as Miracast technology does not support mobile unit asking to the vehicular applications scene of the Reverse Turning Control of source device Topic, has further expanded multi-screen interactive technology, such as the usage scenario of Miracast technology.In addition, skill described in the embodiment of the present invention The compatible existing multi-screen interactive agreement of art scheme, if Miracast1.0 is standardized, improvement is small, also has many advantages, such as easy to accomplish.
Embodiment seven:
Based on inventive concept identical with the embodiment of the present invention one, the embodiment of the present invention seven provides a kind of terminal device, The terminal device can be the terminal devices such as mobile phone or tablet computer, and the specific implementation of the terminal device can be found in the above method Associated description in embodiment one, overlaps will not be repeated.Specifically, as shown in fig. 7, it is the structure of the terminal device Schematic diagram, the terminal device are specific can include:
Capability negotiation unit 71 can be used for carrying out the negotiation of reversed audio transmission ability with mobile unit；
Port negotiation unit 72 can be used for if it is determined that the terminal device and the mobile unit support reversed audio to pass Movement Capabilities then negotiate the reversed audio transmission port for being used for transmission audio data with the mobile unit, and anti-using what is negotiated The transmission of audio data is carried out to audio transmission port and the mobile unit.
Optionally, the capability negotiation unit 71 is particularly used in mobile unit transmission and carries first identifier First extended capability negotiation message (such as WFD Extended Capabilities message), the first identifier is for indicating institute State whether terminal device has reversed audio transmission ability, to be disappeared by the mobile unit according to first extended capability negotiation The extended capability that the first identifier and the mobile unit carried in breath has itself, judge the terminal device with Whether the mobile unit supports reversed audio transmission ability；And if receive that the mobile unit returns for table Show that the terminal device and the mobile unit support the response message of reversed audio transmission ability, it is determined that the terminal is set It is standby to support reversed audio transmission ability with the mobile unit, otherwise, it is determined that the terminal device and the mobile unit Not support reversed audio transmission ability；Alternatively,
It is particularly used in and receives the second extended capability negotiation message for carrying second identifier that the mobile unit is sent, The second identifier is for indicating whether the mobile unit has reversed audio transmission ability；If according to second propagation energy The second identifier carried in power negotiation message determines that the mobile unit supports reversed audio transmission ability, and according to described The extended capability that source device itself has, which determines, itself also supports reversed audio transmission ability, it is determined that the source device and institute It states mobile unit and supports reversed audio transmission ability；If according to described carried in the second extended capability negotiation message Two marks determine that the mobile unit does not support reversed audio transmission ability, or, the expansion itself being had according to the source device Exhibition ability, which determines, itself does not support reversed audio transmission ability, it is determined that the source device is not supported with the mobile unit Reversed audio transmission ability.
Wherein, the first identifier can pass through the setting reserved bit in the message field of the first extended capability negotiation message Value indicate；The second identifier can pass through the setting reserved bit in the message field of the second extended capability negotiation message Value indicate.
Further, the port negotiation unit 72 is particularly used in mobile unit transmission parameter acquisition request and disappears It ceases, the backward end slogan for negotiating reversed audio transmission port numbers is carried in the parameter acquisition request message and negotiates parameter Domain (such as the wfd-reverse-audio-port parameter field newly defined)；And it receives the mobile unit and is obtained for the parameter The parameter that request message returns obtains response message, and the parameter, which obtains, to be carried in response message added with the mobile unit The backward end slogan for the reversed audio transmission port numbers supported negotiates parameter field；And response is obtained according to the parameter and is disappeared Breath, Xiang Suoshu mobile unit return parameters are arranged request message, are carried in the parameter setting request message added with described The backward end slogan of reversed audio transmission port numbers selected by terminal device negotiates parameter field, to inform the mobile unit two The reversed audio transmission port numbers that person is negotiated；Wherein, reversed audio transmission port numbers selected by the terminal device are institutes It is selected from the reversed audio transmission port numbers that the mobile unit is supported to state terminal device.
Further, it is based on inventive concept identical with the embodiment of the present invention two, the embodiment of the present invention seven additionally provides one Kind mobile unit, the mobile unit can be the equipment such as on-vehicle Bluetooth or vehicle mounted guidance, and the specific implementation of the mobile unit can Referring to the associated description in above method embodiment two, overlaps will not be repeated.Specifically, as shown in figure 8, it is the vehicle The structural schematic diagram of equipment is carried, the mobile unit is specific can include:
Capability negotiation unit 81 can be used for carrying out the negotiation of reversed audio transmission ability with source device；
Port negotiation unit 82 can be used for if it is determined that the mobile unit and the source device support reversed audio transmission Ability then negotiates the reversed audio transmission port for being used for transmission audio data with the source device, and utilizes the reversed sound negotiated Frequency transmission port and the source device carry out the transmission of audio data.
Optionally, the capability negotiation unit 81 be particularly used in receive that the source device sends carry first identifier The first extended capability negotiation message, the first identifier is for indicating whether the mobile unit has reversed audio transmission energy Power；If determining that the source device supports reversed sound according to the first identifier carried in the first extended capability negotiation message Movement Capabilities are kept pouring in, and is determined according to the extended capability that the mobile unit has itself and itself also supports reversed audio transmission energy Power, it is determined that the mobile unit and the source device support reversed audio transmission ability；If according to first propagation energy The first identifier carried in power negotiation message determines that the source device does not support reversed audio transmission ability, or, according to institute It states the extended capability that mobile unit itself has and determines and itself do not support reversed audio transmission ability, it is determined that is described vehicle-mounted to set It is standby that reversed audio transmission ability is not supported with the source device；Alternatively,
It is particularly used in send to the source device and carries the second extended capability negotiation message of second identifier, described the Two mark for indicating whether the mobile unit has reversed audio transmission ability, with by the source device according to described second The extended capability that the second identifier and the source device carried in extended capability negotiation message has itself, judges institute It states mobile unit and whether the source device supports reversed audio transmission ability；And it is returned if receiving the source device For indicating the mobile unit and the source device supports the response message of reversed audio transmission ability, it is determined that it is described Mobile unit and the source device support reversed audio transmission ability, otherwise, it is determined that the mobile unit is set with the source It is standby not to support reversed audio transmission ability.
Wherein, the first identifier can pass through the setting reserved bit in the message field of the first extended capability negotiation message Value indicate；The second identifier can pass through the setting reserved bit in the message field of the second extended capability negotiation message Value indicate.
Further, the port negotiation unit 82, which is particularly used in, receives the parameter acquisition request that the source device is sent Message carries the backward end slogan for negotiating reversed audio transmission port numbers in the parameter acquisition request message and negotiates ginseng Number field；And response message is obtained to the source device return parameters according to the parameter acquisition request message received, it is described Parameter obtains the backward end that the reversed audio transmission port numbers supported added with the mobile unit are carried in response message Slogan negotiates parameter field；And it receives the source device and is asked according to the parameter setting that parameter acquisition response message is returned Message is sought, is carried in the parameter setting request message added with reversed audio transmission port numbers selected by the source device Backward end slogan negotiate parameter field；Wherein, reversed audio transmission port numbers selected by the source device are the source devices Selected by from the reversed audio transmission port numbers that the mobile unit is supported；And according to the parameter setting request message The reversed audio transmission port numbers of middle carrying, the determining reversed audio transmission port numbers negotiated with the source device.
Further, it is based on inventive concept identical with the embodiment of the present invention four, the embodiment of the present invention seven additionally provides separately A kind of terminal device, the another kind terminal device can be the terminal devices such as mobile phone or tablet computer, and the another kind terminal is set Standby specific implementation can be found in the associated description in above method embodiment four, and overlaps will not be repeated.Specifically, such as Fig. 9 Shown, for the structural schematic diagram of another terminal device, the another kind terminal device is specific can include:
Transmission unit 91 can be used for if it is determined that the terminal device supports onboard control device type, then to around respectively setting Standby broadcast is carried for indicating that the terminal device supports the reversed input capability message of the mark of onboard control device type； Wherein, described for indicating that the terminal device supports the mark of vehicle-mounted Reverse Turning Control device type that can be located at the reversed input In the type field of capabilities message；
Receiving unit 92, the Reverse Turning Control for carrying vehicle-mounted Reverse Turning Control information that can be used for receiving mobile unit transmission are logical Use message；Wherein, the vehicle-mounted Reverse Turning Control information may include universal input class corresponding to the vehicle-mounted Reverse Turning Control information The specifying information description of type mark and the vehicle-mounted Reverse Turning Control information, and lead to corresponding to the vehicle-mounted Reverse Turning Control information It is located in the universal input type identification domain of the Reverse Turning Control universal information with input type mark, the vehicle-mounted Reverse Turning Control The specifying information description of information is located in the description field of the Reverse Turning Control universal information；
Processing unit 93 can be used for according to the vehicle-mounted Reverse Turning Control information carried in the Reverse Turning Control universal information Execute corresponding control operation.
It is further to note that the specifying information description of the vehicle-mounted Reverse Turning Control information may include in following information It is one or more:
For indicating that the control button type of the vehicle-mounted Reverse Turning Control information is the control button type of key or knob Information；
The control button action message acted for indicating the control button of the vehicle-mounted Reverse Turning Control information；Wherein, when When the control button type of the vehicle-mounted Reverse Turning Control information is key, the control button action message is for indicating the vehicle The control button movement of Reverse Turning Control information is carried to press or lifting；When the control button type of the vehicle-mounted Reverse Turning Control information When for knob, the control button action message is used to indicate that the control button movement of the vehicle-mounted Reverse Turning Control information to be up time Needle rotation or counterclockwise rotation；
When the control button type of the vehicle-mounted Reverse Turning Control information is key, for indicating the vehicle-mounted Reverse Turning Control The key information of specific key corresponding to information；Or,
When the control button type of the vehicle-mounted Reverse Turning Control information is knob, for indicating the vehicle-mounted Reverse Turning Control The rotation angle information of specific rotation angle corresponding to information.
Further, it is based on inventive concept identical with the embodiment of the present invention five, the embodiment of the present invention seven additionally provides separately A kind of mobile unit, the another kind mobile unit can be the equipment such as on-vehicle Bluetooth or vehicle mounted guidance, and the another kind is vehicle-mounted sets Standby specific implementation can be found in the associated description in above method embodiment five, and overlaps will not be repeated.Specifically, such as Figure 10 Shown, for the structural schematic diagram of another mobile unit, the another kind mobile unit is specific can include:
Receiving unit 101 can be used for receiving the reversed input capability message of source device broadcast；
Processing unit 102, for if it is determined that carrying in the reversed input capability message for indicating the source device It supports the mark of onboard control device type and determines that itself need to carry out Reverse Turning Control to the source device, then trigger transmission unit 103 send the Reverse Turning Control universal information for carrying vehicle-mounted Reverse Turning Control information to the source device；
Transmission unit 103, can be used for the triggering according to the processing unit 102, and the transmission of Xiang Suoshu source device carries vehicle The Reverse Turning Control universal information of Reverse Turning Control information is carried, to indicate that the source device is executed according to the vehicle-mounted Reverse Turning Control information Corresponding control operation.
Wherein, the vehicle-mounted Reverse Turning Control information may include universal input class corresponding to the vehicle-mounted Reverse Turning Control information The specifying information description of type mark and the vehicle-mounted Reverse Turning Control information.
And it is described for indicating that the source device supports the mark of onboard control device type that can be located at the reversed input In the type field of capabilities message；Universal input type identification corresponding to the vehicle-mounted Reverse Turning Control information can be located at described reversed In the universal input type identification domain for controlling universal information, the specifying information description of the vehicle-mounted Reverse Turning Control information can be located at institute In the description field for stating Reverse Turning Control universal information.
It is further to note that the specifying information description of the vehicle-mounted Reverse Turning Control information may include in following information It is one or more:
For indicating that the control button type of the vehicle-mounted Reverse Turning Control information is the control button type of key or knob Information；
The control button action message acted for indicating the control button of the vehicle-mounted Reverse Turning Control information；Wherein, when When the control button type of the vehicle-mounted Reverse Turning Control information is key, the control button action message is for indicating the vehicle The control button movement of Reverse Turning Control information is carried to press or lifting；When the control button type of the vehicle-mounted Reverse Turning Control information When for knob, the control button action message is used to indicate that the control button movement of the vehicle-mounted Reverse Turning Control information to be up time Needle rotation or counterclockwise rotation；
When the control button type of the vehicle-mounted Reverse Turning Control information is key, for indicating the vehicle-mounted Reverse Turning Control The key information of specific key corresponding to information；Or,
When the control button type of the vehicle-mounted Reverse Turning Control information is knob, for indicating the vehicle-mounted Reverse Turning Control The rotation angle information of specific rotation angle corresponding to information.
Further, it is based on inventive concept identical with the embodiment of the present invention one~tri-, the embodiment of the present invention seven also provides A kind of data transmission system, the specific implementation of the data transmission system can be found in the correlation in above method embodiment one~tri- Description, overlaps will not be repeated.It specifically, as shown in figure 11, is the structural schematic diagram of the data transmission system, it is described Data transmission system specifically may include source device 111 and mobile unit 112, in which:
The source device 111 can be used for carrying out the negotiation of reversed audio transmission ability with the mobile unit 112, and, If it is determined that itself and the mobile unit 112 support reversed audio transmission ability, then it is used for the mobile unit 112 negotiation The reversed audio transmission port of audio data is transmitted, and utilizes the reversed audio transmission port and the mobile unit 112 negotiated Carry out the transmission of audio data；
The mobile unit 112 can be used for carrying out the negotiation of reversed audio transmission ability with the source device 111, and, If it is determined that itself and the source device 111 support reversed audio transmission ability, then it is used for transmission with the source device 111 negotiation The reversed audio transmission port of audio data, and sound is carried out using the reversed audio transmission port and the source device 111 negotiated The transmission of frequency evidence.
Further, it is based on inventive concept identical with the embodiment of the present invention four~six, the embodiment of the present invention seven also provides A kind of revertive control system, the specific implementation of the revertive control system can be found in the phase in above method embodiment four~six Description is closed, overlaps will not be repeated.It specifically, as shown in figure 12, is the structural schematic diagram of the revertive control system, institute Stating revertive control system specifically may include source device 121 and mobile unit 122, in which:
The source device 121 can be used for if it is determined that itself supports onboard control device type, then to each device broadcasts around It carries for indicating that the source device 121 supports the reversed input capability message of the mark of onboard control device type；And If receiving the Reverse Turning Control universal information for carrying vehicle-mounted Reverse Turning Control information that any mobile unit 122 is sent, basis The vehicle-mounted Reverse Turning Control information carried in the Reverse Turning Control universal information executes corresponding control operation；
The mobile unit 122, the reversed input capability message broadcasted for receiving the source device 121, and if it is determined that Carried in the reversed input capability message for indicate the source device 121 support the mark of onboard control device type and Reverse Turning Control need to be carried out to the source device 121 by determining itself, then carries vehicle-mounted Reverse Turning Control to the source device 121 transmission The Reverse Turning Control universal information of information, to indicate that the source device 121 executes accordingly according to the vehicle-mounted Reverse Turning Control information Control operation.
The embodiment of the present invention seven provides a kind of transmission of data and Reverse Turning Control relevant device and system, implements in the present invention In technical solution described in example seven, source device can carry out the negotiation of reversed audio transmission ability with mobile unit, and determine the two After supporting reversed audio transmission ability, negotiate the reversed audio transmission port for being used for transmission audio data and benefit with mobile unit The transmission of audio data is carried out with the reversed audio transmission port of negotiation and mobile unit, is set to realize mobile unit with source Reversed or even two-way audio data transmission between standby, solves existing multi-screen interactive technology, as Miracast technology is not propped up The problem of holding the vehicular applications scene of the reversed or even two-way audio data transmission between mobile unit and source device, extends more Shield interaction technique, such as the usage scenario of Miracast technology.
In addition, source device can also support vehicle-mounted control determining itself in the technical solution described in the embodiment of the present invention seven When device type, carry to each device broadcasts around for indicating itself to support the reversed of the mark of onboard control device type Input capability message, according to the reversed input capability message, it is vehicle-mounted to determine that source device is supported by each mobile unit around When controlling device type, the Reverse Turning Control universal information of corresponding vehicle-mounted Reverse Turning Control information is carried by sending to source device Mode carries out Reverse Turning Control to source device and solves existing multi-screen to realize mobile unit to the Reverse Turning Control of source device Interaction technique, the problem of not supporting vehicular applications scene of the mobile unit to the Reverse Turning Control of source device such as Miracast technology, Multi-screen interactive technology is further expanded, such as the usage scenario of Miracast technology.
Further more, the compatible existing multi-screen interactive agreement of the technical solution as described in the embodiment of the present invention seven, such as Miracast1.0 specification, improvement is small, thus also has many advantages, such as easy to accomplish.
It will be understood by those skilled in the art that the embodiment of the present invention can provide as method, apparatus (equipment) or computer journey Sequence product.Therefore, complete hardware embodiment, complete software embodiment or combining software and hardware aspects can be used in the present invention The form of embodiment.Moreover, it wherein includes the calculating of computer usable program code that the present invention, which can be used in one or more, The computer program implemented in machine usable storage medium (including but not limited to magnetic disk storage, CD-ROM, optical memory etc.) The form of product.
The present invention be referring to according to the method for the embodiment of the present invention, the flow chart of device (equipment) and computer program product And/or block diagram describes.It should be understood that each process in flowchart and/or the block diagram can be realized by computer program instructions And/or the combination of the process and/or box in box and flowchart and/or the block diagram.It can provide these computer programs to refer to Enable the processor of general purpose computer, special purpose computer, Embedded Processor or other programmable data processing devices to generate One machine so that by the instruction that the processor of computer or other programmable data processing devices executes generate for realizing The device for the function of being specified in one or more flows of the flowchart and/or one or more blocks of the block diagram.
These computer program instructions, which may also be stored in, is able to guide computer or other programmable data processing devices with spy Determine in the computer-readable memory that mode works, so that it includes referring to that instruction stored in the computer readable memory, which generates, Enable the manufacture of device, the command device realize in one box of one or more flows of the flowchart and/or block diagram or The function of being specified in multiple boxes.
These computer program instructions also can be loaded onto a computer or other programmable data processing device, so that counting Series of operation steps are executed on calculation machine or other programmable devices to generate computer implemented processing, thus in computer or The instruction executed on other programmable devices is provided for realizing in one or more flows of the flowchart and/or block diagram one The step of function of being specified in a box or multiple boxes.
Although preferred embodiments of the present invention have been described, it is created once a person skilled in the art knows basic Property concept, then additional changes and modifications may be made to these embodiments.So it includes excellent that the following claims are intended to be interpreted as It selects embodiment and falls into all change and modification of the scope of the invention.
Obviously, various changes and modifications can be made to the invention without departing from essence of the invention by those skilled in the art Mind and range.In this way, if these modifications and changes of the present invention belongs to the range of the claims in the present invention and its equivalent technologies Within, then the present invention is also intended to include these modifications and variations.

Claims (13)

1. a kind of data transmission method characterized by comprising
Source device and mobile unit carry out the negotiation of reversed audio transmission ability；
If it is determined that itself and the mobile unit support reversed audio transmission ability, then negotiate with the mobile unit for passing The reversed audio transmission port of transfer audio data, and sound is carried out using the reversed audio transmission port and the mobile unit negotiated The transmission of frequency evidence；
Source device and mobile unit carry out the negotiation of reversed audio transmission ability, comprising:
The the first extended capability negotiation message for carrying first identifier is sent to the mobile unit, the first identifier is used for table Show whether the source device has reversed audio transmission ability, to be negotiated by the mobile unit according to first extended capability The extended capability that the first identifier and the mobile unit carried in message has itself, judge the source device with Whether the mobile unit supports reversed audio transmission ability；And if receive that the mobile unit returns for table Show the source device and the mobile unit support the response message of reversed audio transmission ability, it is determined that the source device with The mobile unit supports reversed audio transmission ability, otherwise, it is determined that the source device and the mobile unit are not equal Support reversed audio transmission ability；
Alternatively,
The the second extended capability negotiation message for carrying second identifier that the mobile unit is sent is received, the second identifier is used Whether there is reversed audio transmission ability in the expression mobile unit；If being taken according in the second extended capability negotiation message The second identifier of band determines that the mobile unit supports reversed audio transmission ability, and itself is had according to the source device Standby extended capability, which determines, itself also supports reversed audio transmission ability, it is determined that the source device is propped up with the mobile unit Hold reversed audio transmission ability；If according to the second identifier determination carried in the second extended capability negotiation message Mobile unit does not support reversed audio transmission ability, or, determining itself according to the extended capability that the source device has itself Reversed audio transmission ability is not supported, it is determined that the source device and the mobile unit not support reversed audio transmission energy Power.
2. the method as described in claim 1, which is characterized in that
The value for the setting reserved bit in message field that the first identifier passes through the first extended capability negotiation message is come table Show；
The value for the setting reserved bit in message field that the second identifier passes through the second extended capability negotiation message is come table Show.
3. method according to claim 1 or 2, which is characterized in that described to be used for transmission audio with mobile unit negotiation The reversed audio transmission port of data, comprising:
Parameter acquisition request message is sent to the mobile unit, is carried in the parameter acquisition request message anti-for negotiating Negotiate parameter field to the backward end slogan of audio transmission port numbers；
It receives the mobile unit and obtains response message for the parameter that the parameter acquisition request message returns, the parameter obtains Take the backward end slogan association that the reversed audio transmission port numbers supported added with the mobile unit are carried in response message Quotient's parameter field；
Response message is obtained according to the parameter, request message, the parameter setting is arranged in Xiang Suoshu mobile unit return parameters The backward end slogan added with reversed audio transmission port numbers selected by the source device is carried in request message negotiates ginseng Number field, to inform reversed audio transmission port numbers that both described mobile units are negotiated；Wherein, selected by the source device Reversed audio transmission port numbers are that the source device is selected from the reversed audio transmission port numbers that the mobile unit is supported It takes.
4. a kind of data transmission method characterized by comprising
Mobile unit and source device carry out the negotiation of reversed audio transmission ability；
If it is determined that itself and the source device support reversed audio transmission ability, then sound is used for transmission with source device negotiation The reversed audio transmission port of frequency evidence, and audio data is carried out using the reversed audio transmission port and the source device negotiated Transmission；
Mobile unit and source device carry out the negotiation of reversed audio transmission ability, comprising:
The the first extended capability negotiation message for carrying first identifier that the source device is sent is received, the first identifier is used for Indicate whether the mobile unit has reversed audio transmission ability；If being carried according in the first extended capability negotiation message The first identifier determine that the source device supports reversed audio transmission ability, and itself had according to the mobile unit Extended capability determine and itself also support reversed audio transmission ability, it is determined that the mobile unit is supported with the source device Reversed audio transmission ability；If determining the source according to the first identifier carried in the first extended capability negotiation message Equipment does not support reversed audio transmission ability, or, determining itself not according to the extended capability that the mobile unit has itself Support reversed audio transmission ability, it is determined that the mobile unit and the source device not support reversed audio transmission energy Power；
Alternatively,
The the second extended capability negotiation message for carrying second identifier is sent to the source device, the second identifier is for indicating Whether the mobile unit has reversed audio transmission ability, to be disappeared by the source device according to second extended capability negotiation The extended capability that the second identifier and the source device carried in breath has itself, judges the mobile unit and institute State whether source device supports reversed audio transmission ability；And if receive that the source device returns for indicating described Mobile unit and the source device support the response message of reversed audio transmission ability, it is determined that the mobile unit with it is described Source device supports reversed audio transmission ability, otherwise, it is determined that the mobile unit and the source device are not supported instead To audio transmission ability.
5. method as claimed in claim 4, which is characterized in that
The value for the setting reserved bit in message field that the first identifier passes through the first extended capability negotiation message is come table Show；
The value for the setting reserved bit in message field that the second identifier passes through the second extended capability negotiation message is come table Show.
6. method as described in claim 4 or 5, which is characterized in that described to be used for transmission audio number with source device negotiation According to reversed audio transmission port, comprising:
The parameter acquisition request message that the source device is sent is received, is carried in the parameter acquisition request message for negotiating The backward end slogan of reversed audio transmission port numbers negotiates parameter field；
Response message, the parameter are obtained to the source device return parameters according to the parameter acquisition request message received Obtain the backward end slogan that the reversed audio transmission port numbers supported added with the mobile unit are carried in response message Negotiate parameter field；
It receives the source device and the parameter setting request message that response message is returned is obtained according to the parameter, the parameter is set It sets and carries the backward end slogan negotiation added with reversed audio transmission port numbers selected by the source device in request message Parameter field；Wherein, reversed audio transmission port numbers selected by the source device are the source devices from the mobile unit institute Selected by the reversed audio transmission port numbers supported；
According to the reversed audio transmission port numbers carried in the parameter setting request message, determination is negotiated with the source device Reversed audio transmission port numbers.
7. a kind of terminal device characterized by comprising
Capability negotiation unit, for carrying out the negotiation of reversed audio transmission ability with mobile unit；
Port negotiation unit, for if it is determined that the terminal device and the mobile unit support reversed audio transmission ability, Then negotiate the reversed audio transmission port for being used for transmission audio data with the mobile unit, and is passed using the reversed audio negotiated Defeated port and the mobile unit carry out the transmission of audio data；
The capability negotiation unit carries the first extended capability association of first identifier specifically for sending to the mobile unit Quotient's message, the first identifier is for indicating whether the terminal device has reversed audio transmission ability, by described vehicle-mounted Equipment itself is had according to the first identifier and the mobile unit that carry in the first extended capability negotiation message Standby extended capability, judges whether the terminal device and the mobile unit support reversed audio transmission ability；And if Receive the mobile unit return is used to indicate that the terminal device and the mobile unit to support reversed audio transmission The response message of ability, it is determined that the terminal device and the mobile unit support reversed audio transmission ability, otherwise, then Determine that the terminal device and the mobile unit not support reversed audio transmission ability；
Alternatively,
The the second extended capability negotiation message for carrying second identifier sent specifically for receiving the mobile unit, described the Two marks are for indicating whether the mobile unit has reversed audio transmission ability；If being negotiated according to second extended capability The second identifier carried in message determines that the mobile unit supports reversed audio transmission ability, and is set according to the terminal The standby extended capability itself having, which determines, itself also supports reversed audio transmission ability, it is determined that the terminal device with it is described Mobile unit supports reversed audio transmission ability；If according to described second carried in the second extended capability negotiation message Mark determines that the mobile unit does not support reversed audio transmission ability, or, the expansion itself being had according to the terminal device Exhibition ability, which determines, itself does not support reversed audio transmission ability, it is determined that the terminal device is not propped up with the mobile unit Hold reversed audio transmission ability.
8. terminal device as claimed in claim 7, which is characterized in that
The value for the setting reserved bit in message field that the first identifier passes through the first extended capability negotiation message is come table Show；
The value for the setting reserved bit in message field that the second identifier passes through the second extended capability negotiation message is come table Show.
9. terminal device as claimed in claim 7 or 8, which is characterized in that
The port negotiation unit is specifically used for sending parameter acquisition request message to the mobile unit, and the parameter obtains The backward end slogan for negotiating reversed audio transmission port numbers is carried in request message negotiates parameter field；And
It receives the mobile unit and obtains response message for the parameter that the parameter acquisition request message returns, the parameter obtains Take the backward end slogan association that the reversed audio transmission port numbers supported added with the mobile unit are carried in response message Quotient's parameter field；And
Response message is obtained according to the parameter, request message, the parameter setting is arranged in Xiang Suoshu mobile unit return parameters The backward end slogan added with reversed audio transmission port numbers selected by the terminal device is carried in request message to negotiate Parameter field, to inform reversed audio transmission port numbers that both described mobile units are negotiated；Wherein, selected by the terminal device The reversed audio transmission port numbers taken are the reversed audio transmission port numbers that the terminal device is supported from the mobile unit In it is selected.
10. a kind of mobile unit characterized by comprising
Capability negotiation unit, for carrying out the negotiation of reversed audio transmission ability with source device；
Port negotiation unit, for if it is determined that the mobile unit and the source device support reversed audio transmission ability, then Negotiate the reversed audio transmission port for being used for transmission audio data with the source device, and utilizes the reversed audio transmission end negotiated Mouth carries out the transmission of audio data with the source device；
The capability negotiation unit, the first extended capability for carrying first identifier sent specifically for receiving the source device Negotiation message, the first identifier is for indicating whether the mobile unit has reversed audio transmission ability；If according to described The first identifier carried in first extended capability negotiation message determines that the source device supports reversed audio transmission ability, and It is determined according to the extended capability that the mobile unit has itself and itself also supports reversed audio transmission ability, it is determined that is described Mobile unit and the source device support reversed audio transmission ability；If being taken according in the first extended capability negotiation message The first identifier of band determines that the source device does not support reversed audio transmission ability, or, according to the mobile unit itself The extended capability being had, which determines, itself does not support reversed audio transmission ability, it is determined that the mobile unit and the source device Not support reversed audio transmission ability；
Alternatively,
The second extended capability negotiation message of second identifier, the second identifier are carried specifically for sending to the source device For indicating whether the mobile unit has reversed audio transmission ability, with by the source device according to second propagation energy The extended capability that the second identifier and the source device carried in power negotiation message has itself, judges described vehicle-mounted Whether equipment and the source device support reversed audio transmission ability；And if receive being used for for the source device return It indicates the mobile unit and the source device supports the response message of reversed audio transmission ability, it is determined that is described vehicle-mounted to set It is standby to support reversed audio transmission ability with the source device, otherwise, it is determined that the mobile unit is not with the source device Support reversed audio transmission ability.
11. mobile unit as claimed in claim 10, which is characterized in that
The value for the setting reserved bit in message field that the first identifier passes through the first extended capability negotiation message is come table Show；
The value for the setting reserved bit in message field that the second identifier passes through the second extended capability negotiation message is come table Show.
12. mobile unit as described in claim 10 or 11, which is characterized in that
The port negotiation unit, the parameter acquisition request message sent specifically for receiving the source device, the parameter obtain The backward end slogan carried in request message for negotiating reversed audio transmission port numbers is taken to negotiate parameter field；And
Response message, the parameter are obtained to the source device return parameters according to the parameter acquisition request message received Obtain the backward end slogan that the reversed audio transmission port numbers supported added with the mobile unit are carried in response message Negotiate parameter field；And
It receives the source device and the parameter setting request message that response message is returned is obtained according to the parameter, the parameter is set It sets and carries the backward end slogan negotiation added with reversed audio transmission port numbers selected by the source device in request message Parameter field；Wherein, reversed audio transmission port numbers selected by the source device are the source devices from the mobile unit institute Selected by the reversed audio transmission port numbers supported；And according to the reversed audio carried in the parameter setting request message Transmission port number, the determining reversed audio transmission port numbers negotiated with the source device.
13. a kind of data transmission system, which is characterized in that the system comprises source device and mobile units, in which:
The source device, for carrying out the negotiation of reversed audio transmission ability with the mobile unit, and, however, it is determined that itself with The mobile unit supports reversed audio transmission ability, then is used for transmission the reversed of audio data with mobile unit negotiation Audio transmission port, and utilize the transmission of the reversed audio transmission port negotiated and mobile unit progress audio data；
The mobile unit, for carrying out the negotiation of reversed audio transmission ability with the source device, and, however, it is determined that itself with The source device supports reversed audio transmission ability, then negotiates the reversed audio for being used for transmission audio data with the source device Transmission port, and utilize the transmission of the reversed audio transmission port negotiated and source device progress audio data；
Source device and mobile unit carry out the negotiation of reversed audio transmission ability, comprising:
The the first extended capability negotiation message for carrying first identifier is sent to the mobile unit, the first identifier is used for table Show whether the source device has reversed audio transmission ability, to be negotiated by the mobile unit according to first extended capability The extended capability that the first identifier and the mobile unit carried in message has itself, judge the source device with Whether the mobile unit supports reversed audio transmission ability；And if receive that the mobile unit returns for table Show the source device and the mobile unit support the response message of reversed audio transmission ability, it is determined that the source device with The mobile unit supports reversed audio transmission ability, otherwise, it is determined that the source device and the mobile unit are not equal Support reversed audio transmission ability；
Alternatively,
The the second extended capability negotiation message for carrying second identifier that the mobile unit is sent is received, the second identifier is used Whether there is reversed audio transmission ability in the expression mobile unit；If being taken according in the second extended capability negotiation message The second identifier of band determines that the mobile unit supports reversed audio transmission ability, and itself is had according to the source device Standby extended capability, which determines, itself also supports reversed audio transmission ability, it is determined that the source device is propped up with the mobile unit Hold reversed audio transmission ability；If according to the second identifier determination carried in the second extended capability negotiation message Mobile unit does not support reversed audio transmission ability, or, determining itself according to the extended capability that the source device has itself Reversed audio transmission ability is not supported, it is determined that the source device and the mobile unit not support reversed audio transmission energy Power.
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