WO2022198357A1 - 数据处理方法及传输设备、数据处理系统 - Google Patents

数据处理方法及传输设备、数据处理系统 Download PDF

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Publication number
WO2022198357A1
WO2022198357A1 PCT/CN2021/081977 CN2021081977W WO2022198357A1 WO 2022198357 A1 WO2022198357 A1 WO 2022198357A1 CN 2021081977 W CN2021081977 W CN 2021081977W WO 2022198357 A1 WO2022198357 A1 WO 2022198357A1
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WIPO (PCT)
Prior art keywords
data
packet
data packet
indicate
transmission device
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PCT/CN2021/081977
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English (en)
French (fr)
Inventor
鲍鹏鑫
王学寰
张兴新
Original Assignee
华为技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to PCT/CN2021/081977 priority Critical patent/WO2022198357A1/zh
Priority to CN202180000792.0A priority patent/CN113196720B/zh
Publication of WO2022198357A1 publication Critical patent/WO2022198357A1/zh

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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L69/00Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
    • H04L69/22Parsing or analysis of headers
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00Television systems
    • H04N7/10Adaptations for transmission by electrical cable

Definitions

  • the present application relates to the field of communication technologies, and in particular, to a data processing method, a transmission device, and a data processing system.
  • an electronic device may be connected to multiple display screens, and different videos can be obtained from the electronic device and displayed on different display screens.
  • different videos can be obtained from the electronic device and displayed on different display screens.
  • the deployment rule of the display screen in the car is generally that the display screen is farther away from the vehicle, and the distance between the display screens is relatively short.
  • the daisy chain (daisy chain) connection method shown in Figure 1 can be used between the machines.
  • DP includes a main link (main link), an auxiliary channel (auxiliary channel) and a hot plug detection channel (hot plug detect), a total of 11 cables are required, and the number of cables required is relatively large.
  • Embodiments of the present application provide a data processing method, a transmission device, and a data processing system, so as to reduce cables required for data transmission.
  • a first aspect provides a data processing method, the method is applied to a first transmission device, and the method includes: receiving a first data packet, where the first data packet includes primary link data and/or secondary channel data ; Process the first data packet to obtain a second data packet, wherein the second data packet includes a packet header and a load, and the packet header is used to indicate the data type of the load, and the data type includes main link data and at least one of secondary channel data; and sending the second data packet.
  • the cables required for data transmission can be reduced.
  • the first data packet includes main link data
  • the method further includes: converting the first data packet The main link data in is mapped into data packets transmitted on a single channel, that is, single channel data packets, and the main link data includes data of one or more channels.
  • the main link data of the DP interface may include data on one or more channels
  • the first data packet including the main link data is processed This main link data needs to be converted to a channel before the packet can be processed.
  • the packet header is further used to indicate at least one of the sequence number of the second data packet or the length of the payload.
  • the sequence number is used to cyclically count the sent second data packet, and is used for the second transmission device to perform packet loss detection, thereby improving the reliability of data transmission.
  • the length of the payload is used to represent the length of the payload carried in the second data packet, so that the second transmission device can know the length of the payload of the second data packet, and is used to judge the boundary of the second data packet.
  • the packet header is further used to indicate the number of segments of the primary link data.
  • the data packet of the main link data since the data packet of the main link data is long, the data packet of the main link data can be segmented by bytes and divided into several segments for transmission, and a second data packet carries the main link data packet. The header of the second data packet is used to indicate the number of segments of the main link data.
  • the packet header is further used to indicate a transmission mode supported by the display interface, and the transmission mode includes a single stream transport (SST) mode or a multi-stream transport (MST) mode )model. Since the structure of the data packets in the single-stream transmission mode and the multi-stream transmission mode of the DP interface is different, in this implementation, the transmission mode can also be indicated in the packet header, so that when the second transmission device receives the second data packet, it can Different conversion processing is performed on the second data packet according to the indicated transmission mode.
  • SST single stream transport
  • MST multi-stream transport
  • the transmission mode is a multi-stream transmission mode
  • the packet header is further used to indicate the number of data streams included in the payload.
  • the packet header is further used to indicate that the second data packet contains display interface data. In this implementation, it is indicated by the packet header that the second data packet contains display interface data, and the second transmission device may perform corresponding processing on the display interface data when receiving the second data packet.
  • a data processing method is provided, the method is applied to a second transmission device, the method includes: receiving a second data packet, the second data packet includes a packet header and a payload, and the packet header is used to indicate The data type of the load, the data type includes at least one of main link data and auxiliary channel data; and decapsulating the second data packet to obtain a first data packet, the first data packet includes main Link data and/or secondary channel data.
  • the first data packet includes main link data
  • the main link data is a single-channel data packet
  • the method also includes mapping the single-channel data packets onto one or more channels.
  • the packet header is further used to indicate at least one of the sequence number of the second data packet or the length of the payload.
  • the packet header is further used to indicate the number of segments of the primary link data.
  • the packet header is further used to indicate a transmission mode supported by the display interface, and the transmission mode includes a single-stream transmission mode or a multi-stream transmission mode.
  • the transmission mode is a multi-stream transmission mode
  • the packet header is further used to indicate the number of data streams included in the payload.
  • the packet header is further used to indicate that the second data packet contains display interface DP data.
  • a transmission device including: a transceiver unit for receiving a first data packet, the first data packet including primary link data and/or secondary channel data; a processing unit for processing the The first data packet is obtained, and the second data packet is obtained, wherein the second data packet includes a packet header and a payload, the packet header is used to indicate the data type of the payload, and the data type includes the main link data and all data types. at least one of the auxiliary channel data; and the transceiver unit, further configured to send the second data packet.
  • the first data packet includes main link data; the processing unit is further configured to map the main link data in the first data packet into a single-channel data packet, the Main link data includes data for one or more channels.
  • the packet header is further used to indicate at least one of the sequence number of the second data packet or the length of the payload.
  • the packet header is further used to indicate the number of segments of the primary link data.
  • the packet header is further used to indicate a transmission mode supported by the display interface, and the transmission mode includes a single-stream transmission mode or a multi-stream transmission mode.
  • the transmission mode is a multi-stream transmission mode
  • the packet header is further used to indicate the number of data streams included in the payload.
  • the packet header is further used to indicate that the second data packet contains display interface DP data.
  • a transmission device comprising: a transceiver unit configured to receive a second data packet, where the second data packet includes a packet header and a payload, the packet header is used to indicate a data type of the payload, the The data type includes at least one of main link data and auxiliary channel data; and a processing unit, configured to decapsulate the second data packet to obtain a first data packet, and the first data packet includes main link data and / or Auxiliary channel data.
  • the first data packet includes main link data; the processing unit is further configured to map the single-channel data packet to one or more channels.
  • the packet header is further used to indicate at least one of the sequence number of the second data packet or the length of the payload.
  • the packet header is further used to indicate the number of segments of the primary link data.
  • the packet header is further used to indicate a transmission mode supported by the display interface, and the transmission mode includes a single-stream transmission mode or a multi-stream transmission mode.
  • the transmission mode is a multi-stream transmission mode
  • the packet header is further used to indicate the number of data streams included in the payload.
  • the packet header is further used to indicate that the second data packet contains display interface DP data.
  • a fifth aspect provides a data processing system, comprising the transmission device described in the third aspect or any one of the third aspect, or, as described in the fourth aspect or any one of the fourth aspect transmission device.
  • a transmission device comprising: one or more processors configured to execute a program stored in a memory, when the program is executed, the transmission device is caused to execute the first aspect or the first Any of the aspects implement the method.
  • the memory is located outside the transmission device.
  • a transmission device comprising: one or more processors configured to execute a program stored in a memory, and when the program is executed, cause the transmission device to execute the second aspect or the second Any of the aspects implement the method.
  • the memory is located outside the transmission device.
  • a computer-readable storage medium comprising computer instructions, when the computer instructions are executed on a computer, any one of the above-mentioned first aspect, second aspect, and any possible implementation of the first aspect or the first The method described in any possible implementation of the two aspects is performed.
  • a computer program product comprising computer instructions that, when the computer instructions are executed on a computer, cause the computer to execute any one of the above-mentioned first aspect, second aspect, or any possible implementation of the first aspect or Any possible implementation of the method of the second aspect.
  • FIG. 1 is a schematic diagram of a daisy-chain connection between an exemplary display screen and a vehicle
  • Fig. 2 is the internal structure schematic diagram of DP interface
  • Fig. 3 is the structural schematic diagram that the data packet is mapped to 4 channels in SST mode
  • Fig. 4a is a structural representation of the data packet under MST mode
  • Fig. 4b is another structural schematic diagram of the data packet under MST mode
  • FIG. 5 is a schematic diagram of the topology structure of multi-stream transmission in MST mode
  • Fig. 6 is the structural representation of auxiliary channel transmission data packet
  • FIG. 7 is a schematic flowchart of a data processing method provided by an embodiment of the present application.
  • FIG. 8 is a schematic diagram of processing DP data in a vehicle-mounted scene according to an example of an embodiment of the present application.
  • FIG. 9 is a schematic diagram of processing DP data in another vehicle-mounted scene according to an example of an embodiment of the present application.
  • FIG. 10 is a schematic diagram of processing DP data in another vehicle-mounted scene according to an example of an embodiment of the present application.
  • FIG. 11 is a schematic structural diagram of a transmission device according to an embodiment of the application.
  • FIG. 12 is a schematic structural diagram of another transmission device provided by an embodiment of the present application.
  • FIG. 13 is a schematic structural diagram of another transmission device provided by an embodiment of the application.
  • FIG. 14 is a schematic structural diagram of a data processing system provided by an embodiment of the present application.
  • the source device source device
  • the sink device sink device
  • DP interface includes main link, auxiliary channel and hot plug detection channel.
  • the main link is unidirectional high-speed transmission, consisting of 4 pairs of wires, which can be configured as 1/2/4 pairs of wires in use (that is, 1 pair, 2 pairs or 4 pairs of wires among the 4 pairs of wires are configured for data transmission), used to carry audio and video services.
  • the auxiliary channel is bidirectional low-speed transmission, consisting of a pair of lines, and is used to carry services such as link management and device management.
  • the hot-plug detection channel is a one-way transmission signal composed of 1 wire, which is used for hot-plug detection.
  • the DP interface supports a single-stream transport (SST) mode and a multi-stream transport (MST) mode.
  • SST single-stream transport
  • MST multi-stream transport
  • the MST mode supports the above-mentioned daisy-chain connection.
  • the main link data can be mapped to 1/2/4 of the 4 lanes, respectively. Specifically, assuming that 1 pair of lines is configured to transmit main link data, it is mapped to 1 of the 4 channels, and the remaining 3 channels are idle; assuming that 2 pairs of lines are configured to transmit main link data, it is mapped to 4 channels On 2 of the channels, the remaining 2 channels are idle; if 4 pairs of lines are configured to transmit main link data, they are mapped to 4 channels respectively.
  • FIG. 3 it is a schematic structural diagram of mapping data packets to 4 channels in the SST mode.
  • the data between two blanking ends (BE) on each channel is an SST data packet, which can contain one line of image pixel data.
  • pix and the omitted part represented by "---" in the figure are image pixel data
  • blanking start (BS) is the control symbol
  • VB-ID is the indication information of the data attribute
  • Mvid and Maud are the clock information .
  • a second data packet may also be carried between the clock information and the second BE, which includes audio data and audio attribute information, and padding symbols.
  • MST mode refers to the transmission of multiple video stream data in one data packet.
  • Figure 4a it is a schematic diagram of the structure of a data packet in MST mode.
  • An MST data packet consists of 64 time slots, of which the first time slot carries a multi-stream transport packet header (MTPH). ), and other time slots are allocated to each data stream according to the number of data streams on the link and the bandwidth occupied by each data stream, carrying a maximum of 63 data streams.
  • MTPH multi-stream transport packet header
  • FIG. 4b it is another schematic diagram of the structure of a data packet in MST mode. Different from Figure 4a, the first to fifth time slots are allocated to carry one video stream, that is, the VC load, and the other time slots reserved.
  • FIG. 5 shows a schematic diagram of the topology of multi-stream transmission in MST mode, wherein DP source device (DP source device) 1 and DP source device 2 include a data source (stream source) and a DP data packet transmitter (DP packet Tx); DP branch device (branch device) 1 and DP branch device 2 are forwarding devices, and each DP branch device includes at least one DP data packet second transmission device and at least one DP data packet transmitter, for assembling or separating data streams; DP The sink device includes a DP second transmission device, which plays the data after receiving the data.
  • the daisy-chain connection shown in Figure 1 can be implemented through the forwarding device.
  • Figure 6 shows a schematic diagram of the structure of the auxiliary channel transmission data packet.
  • the auxiliary channel data packet transmission starts with a SYNC symbol and ends with a STOP symbol, where COMM is the command type, ADDR is the address, LEN is the data length, and DATA is the data.
  • the present application provides a data processing solution. By processing the first data packet to be sent and transmitting the processed second data packet instead of directly transmitting the first data packet, the cables required for data transmission can be reduced.
  • FIG. 7 is a schematic flowchart of a data processing method provided in an embodiment of the present application, the method may include the following steps:
  • the first transmission device receives the first data packet.
  • the first transmission device may be located in an electronic device that provides a source of audio and video data.
  • the first transmission device may receive the first data packet from the DP interface on the processor inside the electronic device, that is, the first data packet is a DP data packet.
  • the first data packet may include primary link data, secondary channel data, or primary link data and secondary channel data.
  • the first transmission device may also map the main link data in the first data packet into Packets transmitted on a single channel, i.e. single-channel packets.
  • the first transmission device processes the first data packet to obtain the second data packet.
  • the second data packet includes a packet header, a payload and a packet trailer.
  • the packet header is used to indicate the data type of the payload, the payload includes the content of the first data packet, and the data type includes the primary link data and secondary channel data. at least one of.
  • the packet header may include a first service type field, where the first service type field is used to indicate the data type of the payload.
  • the first service type field may include 2 bits.
  • the value of the first service type field is "00", which is used to indicate the data type of the load as main link data; for another example, the first data packet includes auxiliary channel data , the value of the first service type field is "01", which is used to indicate that the data type of the load is auxiliary channel data; for another example, if the first data packet includes main link data and auxiliary channel data, then the first service type field The value of is "10", which is used to indicate the data type of the payload as primary link data and secondary channel data.
  • the header can also be used to indicate the length of the payload.
  • the packet header may include a payload length field.
  • the length of the payload in the second data packet may be in bytes.
  • the second transmission device can know the length of the payload of the second data packet according to the length of the payload indicated by the packet header, so as to judge the boundary of the second data packet.
  • the packet header is also used to indicate the sequence number of the second data packet.
  • the second transmission device can count according to the sequence number, so as to detect whether the packet is lost, which can improve the reliability of data transmission.
  • the packet header may include a sequence number field, and the sequence number field may be represented by binary bits and may be counted cyclically. For example, if the number of second data packets sent by the first transmission device within a period of time is 32, 5 bits may be used as the sequence number of the second data packet. Assuming that the currently encapsulated second data packet is the fourth data packet, the value of the sequence number field is "00011"; assuming that the currently encapsulated second data packet is the fifth data packet, the value of the sequence number field is "00100", and so on.
  • the first transmission device receives the first data packet (that is, the first data packet is the main link data or the data type of the second data packet is the main link) sent by the DP transmitter working in the SST mode. data), as shown in FIG. 3, since the first data packet is relatively long, the first data packet can be segmented. Specifically, the number of bytes in each data packet can be limited to perform segmentation, which is divided into several segments for transmission, and a second data packet carries a segment of the main link data packet. Then the header can also be used to indicate the number of segments of the main link data.
  • the packet header may include a field of the number of segments, where the field of the number of segments is used to indicate the number of segments of the main link data contained in the payload, that is, the total number of segments of the main link data. For example, assuming that the first data packet is divided into 16 segments, the number of segments can be represented by 4 bits.
  • the format of the second data packet may be as shown in Table 1 below:
  • the packet header includes 32 bits (ie, 4 bytes). Of course, the size of the packet header and the size of each field may not be limited.
  • the packet header includes the first service type, segment number and sequence number fields, and the remaining fields are reserved fields.
  • the first service type field is used to indicate that the current data packet is the main link service data.
  • the Fragment Number field is used to indicate that the main link packet contains several fragments.
  • the sequence number field is used to indicate the number of packets.
  • the payload length field is used to indicate that the payload of the current data packet can be up to 65527*8 bits.
  • the trailer may include cyclic redundancy check (CRC) bits.
  • CRC cyclic redundancy check
  • the format of the second data packet may be as shown in Table 2 below:
  • the auxiliary channel data packet as shown in Figure 6 is smaller than the main link data packet in SST mode, the auxiliary channel data may not be segmented before encapsulation. Therefore, the encapsulation header of the auxiliary channel data may not include segmentation.
  • the number of segments is this field.
  • the first service type field is used to indicate that the current data packet is secondary channel service data.
  • the sequence number field is used to indicate the number of packets.
  • the payload length field is used to indicate that the payload of the current data packet can be up to 65527*8 bits.
  • the trailer may include a CRC check bit. Among them, what the load carries is the part between the DP auxiliary channel data packets SYNC and STOP as shown in FIG. 6 .
  • the packet header, payload and packet trailer of the secondary channel data packet and the packet header of the primary link data packet may be sequentially encapsulated in the second data packet in a concatenated manner , payload and trailer.
  • Table 2 for the data format of the secondary channel data packet, and refer to Table 1 for the data format of the main link data packet.
  • the second data packet can distinguish data on each DP channel.
  • the header of the second data packet can further indicate the second data.
  • Packets include DP data.
  • the packet header may include a second service type field, where the second service type field is used to indicate that the second data packet contains DP data. Therefore, through the second service type field, it is possible to distinguish whether it is a DP service or other non-DP services, so that the DP service and other services can be simultaneously transmitted on the same channel.
  • the second service type field may include 4 bits. When the value of the second service type field is "00", it is used to indicate that the second data packet is a DP data packet ; The value of the field of the second service type is other values, which are respectively used to indicate that the second data packet is another service data packet.
  • the format of the second data packet may be as shown in Table 3 below:
  • the packet header of the second data packet further includes a second service type field, which is used to indicate that the second data packet contains DP data.
  • the meanings of other fields are the same as in Table 1.
  • the format of the second data packet may be as shown in Table 4 below:
  • the packet header of the second data packet further includes a second service type field, which is used to indicate that the second data packet contains DP data.
  • the meanings of other fields are the same as those in Table 2.
  • the packet header of the second data packet may also be used to indicate the transmission mode supported by the DP.
  • the packet header may include a transmission mode field, where the transmission mode is used to indicate that the transmission mode of the DP is the SST mode or the MST mode.
  • the transmission mode field After receiving the second data packet, the second transmission device can perform different conversion processing on the second data packet according to the transmission mode indicated by the packet header.
  • the packet header of the second data packet may also be used to indicate the number of data streams included in the payload.
  • the packet header may include a flow quantity field, where the flow quantity field is used to indicate the number of data flows included in the payload.
  • the format of the second data packet may be as shown in Table 5 below:
  • the second service type field is used to indicate that the second data packet contains DP data;
  • the first service type field is used to indicate that the second data packet is primary link data;
  • the transmission mode is automatically used to indicate that the DP supports SST mode or MST mode; when the transmission mode is MST mode, the number of streams field is a valid value, which is used to indicate that the payload includes several multiplexed data streams; when the transmission mode is SST mode, the number of segments field is a valid value, Used to indicate that the main link packet consists of several fragments.
  • the meanings of other fields are the same as in Table 3.
  • the first transmission device sends a second data packet to the second transmission device.
  • the second transmission device receives the second data packet.
  • a second data packet is obtained, and the second data packet can be sent to the second transmission device in another electronic device through a coaxial cable or a twisted pair cable, etc., without the need for more cables.
  • the other electronic device may be a display screen.
  • the second transmission device decapsulates the second data packet according to the packet header.
  • the second transmission device may first parse the packet header in the second data packet, and decapsulate the second data packet according to the packet header.
  • the second transmission device can know which data packet it has received; according to the first service type field in the packet header, it can know that the second data packet is the primary link data or the secondary data packet.
  • Channel data if the data type of the second data packet is the main link data, and the DP transmitter supports the SST mode, then according to the number of segments in the packet header, it can be known that the received main link data includes several segments;
  • the length of the payload of the second data packet can be known according to the payload length field in the packet header, so as to parse the data of the corresponding length.
  • the received second data packet contains DP data or other service data.
  • the payload includes several multiplexed data streams according to the number of streams in the packet header.
  • the second transmission device decapsulates the second data packet according to the packet header, it can also map the main link data of the single channel to one or more channels. .
  • the transmission chip 1 is located in the vehicle, and the transmission chip 1 and the DP transmission in the system on chip (SoC) of the vehicle are transmitted terminal (DP Tx) connection.
  • the car machine is connected to the display 1, and the car machine is used to provide the display 1 with audio and video data sources.
  • the transmission chip 1 of the vehicle is connected to the transmission chip 2 of the display 1, which may be connected by twisted pair wires or coaxial wires.
  • the transmission chip 2 is connected with the DP second transmission device (DP Rx) in the screen.
  • the SoC in the vehicle machine transmits the DP data packet to the transmission chip 1 through the DP transmitter.
  • the transmission chip 1 and the transmission chip 2 are long-distance transmission chips that meet the requirements of the vehicle scene.
  • the DP transmitter and the DP second transmission device may work in the SST mode or in the MST mode.
  • the transmission chip 1 encapsulates the DP data received from the DP transmitter in the above-mentioned packaging format, and then transmits it to the physical layer of the transmission chip 2 through its physical layer through a twisted pair or a coaxial cable, and the transmission chip 2 parses and receives it.
  • the received encapsulated data packet is obtained, the packet header of the encapsulated data packet is obtained, and the encapsulated data packet is decapsulated according to the packet header to obtain a DP data packet.
  • the transmission chip 1 receives the DP data from the DP transmitter as the main link data, the transmission chip 1 first converts the DP data from one or more channels (for example, 1/2/4 channels) are mapped into single-channel data packets, and then encapsulated.
  • the transmission chip 2 maps the DP data packet to one or more channels. Therefore, the transmission chip 2 can transmit the DP data to the DP second transmission device, and display it on the screen.
  • FIG. 9 it is a schematic diagram of processing DP data in another vehicle-mounted scene.
  • the vehicle is connected to the display 1 and the display 2 in turn. a display.
  • the transmission chip 2 of the display 1 is connected to the transmission chip 2 of the display 2 in addition to the DP second transmission device of the display 1, that is, the display 1 and the display 2 are connected through a daisy chain.
  • the transmission chip 2 is connected with the DP second transmission device in the screen.
  • the working principle of the transmission chip 1 is the same as that of the transmission chip 1 in the scenario shown in FIG. 8 .
  • the main link data may include one or more data streams, and the DP data obtained after decapsulation needs to be offloaded.
  • the data stream of the display 2 is repackaged and transmitted to the transmission chip 2 of the display 2 via a coaxial cable or a twisted pair cable via the physical layer.
  • the working principle of the transmission chip 2 of the display 2 is the same as that of the transmission chip 2 of the display 1 shown in FIG. 8 .
  • FIG. 10 it is an exemplary schematic diagram of processing DP data in another vehicle scene.
  • the transmission chip 1 in the vehicle has two output interfaces, and the contents of the two output interfaces can be Differently, the data at the DP transmitting end needs to be offloaded.
  • the DP transmitter supports the MST mode
  • the DP data packet includes multiple data streams
  • the transmission chip 1 first divides the DP data packet.
  • the DP data packet includes 8 data streams, data stream 1 to data stream 5 It needs to be displayed on display 1 and display 2, and data stream 6 to data stream 8 need to be displayed on display 3, then the transmission chip 1 maps the data stream 1 to data stream 5 transmitted on one or more channels into single-channel data packets.
  • the above-mentioned encapsulation format encapsulates the data stream 1 to the data stream 5, and transmits them to the transmission chip 2 of the display 1 through a twisted pair cable or a coaxial cable through the physical layer.
  • the transmission chip 1 maps the data stream 6 to the data stream 8 transmitted on one or more channels into single-channel data packets, encapsulates the data stream 6 to the data stream 8 according to the above-mentioned encapsulation format, and passes the twisted pair cable through the physical layer. Or the coaxial line is transmitted to the transmission chip 2 of the display 3 .
  • the transmission chip 2 of the display 1 After receiving the encapsulated data packet, the transmission chip 2 of the display 1 parses the data packet to obtain a packet header, and decapsulates the encapsulated data packet according to the packet header to obtain data stream 1 to data stream 5 . Assuming that data stream 1 to data stream 3 are to be displayed on the screen of display 1, and data stream 4 to data stream 5 are to be displayed on the screen of display 2, then the transmission chip 2 of display 1 firstly displays data stream 1 to data stream 5. Divide the traffic into data stream 1 to data stream 3 and data stream 4 to data stream 5; then map the data packets corresponding to data stream 1 to data stream 3 to one or more channels, and map them to one or more channels.
  • Data stream 1 to data stream 3 on multiple channels are transmitted to the second DP transmission device of display 1, and displayed on the screen of display 1;
  • the stranded wire or coaxial wire is transmitted to the transmission chip 2 of the display 2 .
  • the transmission chip 2 of the display 2 After receiving the encapsulated data streams 4 to 5 , the transmission chip 2 of the display 2 performs decapsulation and channel conversion on the encapsulated data streams 4 to 5 .
  • the transmission chip 1 encapsulates the data streams 6 to 8 according to the above-mentioned packaging format, and transmits them to the transmission chip 2 of the display 3 via a twisted pair or a coaxial cable via the physical layer.
  • the transmission chip 2 of the display 3 After receiving the encapsulated data streams 6 to 8 , the transmission chip 2 of the display 3 performs decapsulation and channel conversion on the encapsulated data streams 6 to 8 .
  • a transmission device is also provided.
  • FIG. 11 a schematic structural diagram of a transmission device is provided, and the transmission device is used to execute the above data processing method.
  • the transmission device 1000 includes: a transceiver unit 11 and a processing unit 12 . in:
  • a transceiver unit 11 configured to receive a first data packet, where the first data packet includes primary link data and/or secondary channel data;
  • a processing unit 12 configured to process the first data packet to obtain a second data packet, wherein the second data packet includes a packet header and a payload, the packet header is used to indicate a data type of the payload, and the data type including at least one of the primary link data and the secondary channel data;
  • the transceiver unit 11 is further configured to send the second data packet.
  • the first data packet includes main link data
  • the processing unit 12 is further configured to map the main link data in the first data packet into a single-channel data packet, where the main link data includes data of one or more channels.
  • the packet header is further used to indicate at least one of the sequence number of the second data packet or the length of the payload.
  • the packet header is further used to indicate the number of segments of the primary link data.
  • the packet header is further used to indicate a transmission mode supported by the display interface, and the transmission mode includes a single-stream transmission mode or a multi-stream transmission mode.
  • the transmission mode is a multi-stream transmission mode
  • the packet header is further used to indicate the number of data streams included in the payload.
  • the packet header is further used to indicate that the second data packet contains display interface DP data.
  • the transmission device 2000 includes: a transceiver unit 21 and a processing unit 22 . in:
  • the transceiver unit 21 is configured to receive a second data packet, where the second data packet includes a packet header and a payload, the packet header is used to indicate the data type of the payload, and the data type includes the primary link data and the secondary channel data. at least one of;
  • a processing unit 22 configured to decapsulate the second data packet to obtain a first data packet, where the first data packet includes primary link data and/or secondary channel data.
  • the first data packet includes main link data
  • the processing unit 22 is further configured to map the single-channel data packet to one or more channels.
  • the packet header is further used to indicate at least one of the sequence number of the second data packet or the length of the payload.
  • the packet header is further used to indicate the number of segments of the primary link data.
  • the packet header is further used to indicate a transmission mode supported by the display interface, and the transmission mode includes a single-stream transmission mode or a multi-stream transmission mode.
  • the transmission mode is a multi-stream transmission mode
  • the packet header is further used to indicate the number of data streams included in the payload.
  • the packet header is further used to indicate that the second data packet contains display interface DP data.
  • the above-mentioned transmission device may be a chip or an integrated circuit during specific implementation.
  • the transmission device 3000 may include: a processor 31 (the number of processors 31 in the transmission chip may be one or more, and one processor is taken as an example in FIG. 13 ).
  • the processor 31 is configured to perform the method steps performed by the first transmission device/second transmission device in FIG. 7 .
  • the memory 32 for storing the program is located outside the transmission chip, and the processor 31 is connected to the memory 32 through a circuit or a wire, and is used for reading and executing the program stored in the memory 32 .
  • the processor 31 may be a central processing unit (CPU), a network processor (NP), or a WLAN device.
  • the processor 31 may further include a hardware chip.
  • the above-mentioned hardware chip may be an application-specific integrated circuit (ASIC), a programmable logic device (PLD) or a combination thereof.
  • ASIC application-specific integrated circuit
  • PLD programmable logic device
  • the above-mentioned PLD can be a complex programmable logic device (CPLD), a field-programmable gate array (FPGA), a general-purpose array logic (generic array logic, GAL) or any combination thereof.
  • CPLD complex programmable logic device
  • FPGA field-programmable gate array
  • GAL general-purpose array logic
  • the memory 32 may include volatile memory (volatile memory), such as random-access memory (RAM); the memory may also include non-volatile memory (non-volatile memory), such as flash memory (flash memory) ), a hard disk drive (HDD) or a solid-state drive (SSD); the memory may also include a combination of the above-mentioned types of memory.
  • volatile memory such as random-access memory (RAM)
  • non-volatile memory such as flash memory (flash memory)
  • HDD hard disk drive
  • SSD solid-state drive
  • the memory may also include a combination of the above-mentioned types of memory.
  • a data processing system is also provided, and the system 4000 includes the above-mentioned transmission device 1000 and transmission device 2000 .
  • Embodiments of the present application further provide a computer-readable storage medium, including computer instructions, and when the computer instructions are executed on a computer, the methods in the foregoing embodiments are executed.
  • Embodiments of the present application also provide a computer program product containing instructions, including computer instructions, which, when the computer instructions are run on a computer, cause the computer to execute the methods in the above embodiments.
  • the term “plurality” in the embodiment of the present invention refers to two or more than two.
  • the term “plurality” may also be understood as “at least two” in the embodiment of the present invention.
  • “And/or”, which describes the association relationship of the associated objects means that there can be three kinds of relationships, for example, A and/or B, which can mean that A exists alone, A and B exist at the same time, and B exists alone.
  • the character "/" unless otherwise specified, generally indicates that the related objects are an "or" relationship.
  • the disclosed system, apparatus and method may be implemented in other manners.
  • the division of the unit is only a logical function division, and there may be other division methods in actual implementation, for example, multiple units or components may be combined or integrated into another system, or some features may be ignored, or not implement.
  • the shown or discussed mutual coupling, or direct coupling, or communication connection may be through some interfaces, indirect coupling or communication connection of devices or units, and may be in electrical, mechanical or other forms.
  • Units described as separate components may or may not be physically separated, and components shown as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution in this embodiment.
  • the above-mentioned embodiments it may be implemented in whole or in part by software, hardware, firmware or any combination thereof.
  • software it can be implemented in whole or in part in the form of a computer program product.
  • the computer program product includes one or more computer instructions.
  • the computer program instructions When the computer program instructions are loaded and executed on a computer, the procedures or functions according to the embodiments of the present application are generated in whole or in part.
  • the computer may be a general purpose computer, a special purpose computer, a computer network, or other programmable device.
  • the computer instructions may be stored in or transmitted over a computer-readable storage medium.
  • the computer instructions can be sent from one website site, computer, server, or data center to another by wire (eg, coaxial cable, fiber optic, digital subscriber line (DSL)) or wireless (eg, infrared, wireless, microwave, etc.)
  • wire e.g. coaxial cable, fiber optic, digital subscriber line (DSL)
  • wireless e.g., infrared, wireless, microwave, etc.
  • the computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device such as a server, data center, etc. that includes one or more available media integrated.
  • the available media may be read-only memory (ROM), or random access memory (RAM), or magnetic media, such as floppy disks, hard disks, magnetic tapes, magnetic disks, or optical media, such as , digital versatile disc (digital versatile disc, DVD), or semiconductor media, for example, solid state disk (solid state disk, SSD) and the like.
  • ROM read-only memory
  • RAM random access memory
  • magnetic media such as floppy disks, hard disks, magnetic tapes, magnetic disks, or optical media, such as , digital versatile disc (digital versatile disc, DVD), or semiconductor media, for example, solid state disk (solid state disk, SSD) and the like.

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Abstract

一种数据处理方法及传输设备、数据处理系统。该方法包括:第一传输设备接收第一数据包,第一数据包包括主链路数据和/或辅通道数据(S101),并处理第一数据包,得到第二数据包,第二数据包包括包头和负载,包头用于指示负载的数据类型,数据类型包括主链路数据和辅通道数据中的至少一种(S102),并向第二传输设备发送第二数据包(S103);第二传输设备解封装第二数据包,得到第一数据包(S104)。该方法通过对待发送的第一数据包进行处理,并传输处理后的第二数据包,而不是直接传输该第一数据包,可以减少数据传输所需的线缆。

Description

数据处理方法及传输设备、数据处理系统 技术领域
本申请涉及通信技术领域,尤其涉及一种数据处理方法及传输设备、数据处理系统。
背景技术
随着电子技术的发展,为了方便用户的使用,一个电子设备可能连接多个显示屏,可以从该电子设备获取不同的视频在不同的显示屏上显示。例如,随着汽车工业的发展,车辆内的显示屏越来越多,多块显示屏可以从车机获取不同的视频。然而,如果每一块显示屏都使用线缆与车机单独连接,就会导致车内连接线缆增多,造成成本增加,线缆部署复杂。车内显示屏的部署规律一般是显示屏距离车机较远,而显示屏之间的距离较近,为了减少车内连接线缆,车内的多个显示屏之间、以及显示屏和车机之间可以采用如图1所示的菊花链(daisy chain)连接方式。
目前在视频传输领域支持菊花链连接方式的接口包括显示器接口(display port,DP)。然而,DP包括主链路(main link)、辅通道(auxiliary channel)和热插拔检测通道(hot plug detect),共需要11根线缆,所需线缆数量较多。
有鉴于此,需要减少数据传输所需的线缆。
发明内容
本申请实施例提供了一种数据处理方法及传输设备、数据处理系统,以减少数据传输所需的线缆。
第一方面,提供了一种数据处理方法,所述方法应用于第一传输设备,所述方法包括:接收第一数据包,所述第一数据包包括主链路数据和/或辅通道数据;处理所述第一数据包,得到第二数据包,其中,所述第二数据包包括包头和负载,所述包头用于指示所述负载的数据类型,所述数据类型包括主链路数据和辅通道数据中的至少一种;以及发送所述第二数据包。在该方面中,通过对待发送的第一数据包进行处理,并传输处理后的第二数据包,而不是通过直接传输该第一数据包,可以减少数据传输所需的线缆。
在一种可能的实现中,所述第一数据包包括主链路数据,所述处理所述第一数据包,得到第二数据包之前,所述方法还包括:将所述第一数据包中的主链路数据映射成在单通道上传输的数据包,即单通道数据包,所述主链路数据包括一个或多个通道的数据。在该实现中,当第一数据包中包括主链路数据时,由于DP接口的主链路数据可能包括一个或多个通道上的数据,因此,在对包含主链路数据的第一数据包进行处理之前,需要将该主链路数据转换到一个通道上。
在另一种可能的实现中,所述包头还用于指示所述第二数据包的序号或所述负载的长度中的至少一项。在该实现中,该序号用于对发送的第二数据包进行循环计数,用于第二传输设备进行丢包检测,提高了数据传输的可靠性。该负载的长度用于表示该第二数据包中承载的负载的长度,使得第二传输设备可以知道第二数据包的负载的长度,用于判断第二数据包的边界。
在又一种可能的实现中,所述负载的数据类型为主链路数据时,所述包头还用于指示 所述主链路数据的分段的数量。在该实现中,由于主链路数据的数据包较长,可以按字节将主链路数据的数据包进行分段,分为几段传输,一个第二数据包中承载主链路数据包的一段,第二数据包的包头用于指示主链路数据的分段的数量。
在又一种可能的实现中,所述包头还用于指示显示器接口支持的传输模式,所述传输模式包括单流传输(single stream transport,SST)模式或多流传输(multi-stream transport,MST)模式。由于DP接口的单流传输模式和多流传输模式的数据包的结构不一样,在该实现中,还可以在包头中指示传输模式,以便第二传输设备在接收到第二数据包时,可以根据所指示的传输模式对第二数据包进行不同的转换处理。
在又一种可能的实现中,所述传输模式为多流传输模式,所述包头还用于指示负载中包括的数据流的数量。
在又一种可能的实现中,所述包头还用于指示所述第二数据包包含显示器接口数据。在该实现中,通过包头指示该第二数据包包含显示器接口数据,第二传输设备在接收到第二数据包时,可以对该显示器接口数据进行相应的处理。
第二方面,提供了一种数据处理方法,所述方法应用于第二传输设备,所述方法包括:接收第二数据包,所述第二数据包包括包头和负载,所述包头用于指示所述负载的数据类型,所述数据类型包括主链路数据和辅通道数据中的至少一种;以及解封装所述第二数据包,得到第一数据包,所述第一数据包包括主链路数据和/或辅通道数据。
在一种可能的实现中,所述第一数据包包括主链路数据,所述主链路数据为单通道数据包,所述解封装所述第二数据包,得到第一数据包之后,所述方法还包括:将所述单通道数据包映射到一个或多个通道上。
在又一种可能的实现中,所述包头还用于指示所述第二数据包的序号或所述负载的长度中的至少一项。
在又一种可能的实现中,所述负载的数据类型为主链路数据时,所述包头还用于指示所述主链路数据的分段的数量。
在又一种可能的实现中,所述包头还用于指示显示器接口支持的传输模式,所述传输模式包括单流传输模式或多流传输模式。
在又一种可能的实现中,所述传输模式为多流传输模式,所述包头还用于指示所述负载中包括的数据流的数量。
在又一种可能的实现中,所述包头还用于指示所述第二数据包包含显示器接口DP数据。
第三方面,提供了一种传输设备,包括:收发单元,用于接收第一数据包,所述第一数据包包括主链路数据和/或辅通道数据;处理单元,用于处理所述第一数据包,得到第二数据包,其中,所述第二数据包包括包头和负载,所述包头用于指示所述负载的数据类型,所述数据类型包括所述主链路数据和所述辅通道数据中的至少一种;以及所述收发单元,还用于发送所述第二数据包。
在一种可能的实现中,所述第一数据包包括主链路数据;所述处理单元,还用于将所述第一数据包中的主链路数据映射成单通道数据包,所述主链路数据包括一个或多个通道的数据。
在又一种可能的实现中,所述包头还用于指示所述第二数据包的序号或所述负载的长度中的至少一项。
在又一种可能的实现中,所述负载的数据类型为主链路数据时,所述包头还用于指示所述主链路数据的分段的数量。
在又一种可能的实现中,所述包头还用于指示显示器接口支持的传输模式,所述传输模式包括单流传输模式或多流传输模式。
在又一种可能的实现中,所述传输模式为多流传输模式,所述包头还用于指示所述负载中包括的数据流的数量。
在又一种可能的实现中,所述包头还用于指示所述第二数据包包含显示器接口DP数据。
有关上述传输设备的具体实现和有益效果可参考第一方面或第一方面的任一种可能的实现的描述,在此不再赘述。
第四方面,提供了一种传输设备,包括:收发单元,用于接收第二数据包,所述第二数据包包括包头和负载,所述包头用于指示所述负载的数据类型,所述数据类型包括主链路数据和辅通道数据中的至少一种;以及处理单元,用于解封装所述第二数据包,得到第一数据包,所述第一数据包包括主链路数据和/或辅通道数据。
在一种可能的实现中,所述第一数据包包括主链路数据;所述处理单元,还用于将所述单通道数据包映射到一个或多个通道上。
在又一种可能的实现中,所述包头还用于指示所述第二数据包的序号或所述负载的长度中的至少一项。
在又一种可能的实现中,所述负载的数据类型为主链路数据时,所述包头还用于指示所述主链路数据的分段的数量。
在又一种可能的实现中,所述包头还用于指示显示器接口支持的传输模式,所述传输模式包括单流传输模式或多流传输模式。
在又一种可能的实现中,所述传输模式为多流传输模式,所述包头还用于指示所述负载中包括的数据流的数量。
在又一种可能的实现中,所述包头还用于指示所述第二数据包包含显示器接口DP数据。
有关上述传输设备的具体实现和有益效果可参考第一方面或第一方面的任一种可能的实现的描述,在此不再赘述。
第五方面,提供了一种数据处理系统,包括如第三方面或第三方面的任一种实现所述的传输设备,或,如第四方面或第四方面的任一种实现所述的传输设备。
第六方面,提供了一种传输设备,包括:一个或多个处理器,用于执行存储器中存储的程序,当所述程序被执行时,使得所述传输设备执行如第一方面或第一方面的任一种实现所述的方法。
在一个可能的实现中,所述存储器位于所述传输设备之外。
第七方面,提供了一种传输设备,包括:一个或多个处理器,用于执行存储器中存储的程序,当所述程序被执行时,使得所述传输设备执行如第二方面或第二方面的任一种实 现所述的方法。
在一个可能的实现中,所述存储器位于所述传输设备之外。
第八方面,提供了一种计算机可读存储介质,包括计算机指令,当所述计算机指令在计算机上运行时,上述第一方面、第二方面、第一方面的任一种可能的实现或第二方面的任一种可能的实现所述的方法被执行。
第九方面,提供了一种计算机程序产品,包括计算机指令,当所述计算机指令在计算机上运行时,使得计算机执行上述第一方面、第二方面、第一方面的任一种可能的实现或第二方面的任一种可能的实现所述的方法。
附图说明
图1为示例的显示屏和车机之间采用菊花链连接方式的示意图;
图2为DP接口的内部结构示意图;
图3为SST模式下数据包映射到4个通道上的结构示意图;
图4a为MST模式下的数据包的一个结构示意图;
图4b为MST模式下的数据包的另一个结构示意图;
图5为MST模式时多流传输的拓扑结构示意图;
图6为辅通道传输数据包的结构示意图;
图7为本申请实施例提供的一种数据处理方法的流程示意图;
图8为本申请实施例示例的一种车载场景中的DP数据的处理示意图;
图9为本申请实施例示例的另一种车载场景中的DP数据的处理示意图;
图10为本申请实施例示例的又一种车载场景中的DP数据的处理示意图;
图11为本申请实施例提供的一种传输设备的结构示意图;
图12为本申请实施例提供的又一种传输设备的结构示意图;
图13为本申请实施例提供的又一种传输设备的结构示意图;
图14为本申请实施例提供的一种数据处理系统的结构示意图。
具体实施方式
下面结合本申请实施例中的附图对本申请实施例进行描述。
DP接口
如图2所示的DP接口的内部结构示意图,源设备(source device)和信宿设备(sink device)之间通过DP接口连接。DP接口包括主链路、辅通道和热插拔检测通道。其中,主链路是单向高速传输的,由4对线组成,使用中可以配置成1/2/4对线传输(即配置4对线中的1对、2对或4对线用于数据传输),用于承载音视频业务。辅通道是双向低速传输的,由1对线组成,用于承载链路管理和设备管理等业务。热插拔检测通道是单向传输信号,由1根线组成,用于热插拔检测。
对于主链路数据的传输,DP接口支持单流传输(single-stream transport,SST)模式和多流传输(multi-stream transport,MST)模式。其中,MST模式支持上述菊花链连接方式。
在SST模式下,主链路数据可以分别映射到4个通道(lane)中的1/2/4个通道上。具 体地,假设配置1对线传输主链路数据,则映射到4个通道的其中1个通道上,其余3个通道空闲;假设配置2对线传输主链路数据,则映射到4个通道的其中2个通道上,其余2个通道空闲;假设配置4对线传输主链路数据,则分别映射到4个通道上。
具体地,如图3所示,为SST模式下数据包映射到4个通道上的结构示意图。其中,每个通道上的两个消隐结束(blanking end,BE)之间的数据为一个SST数据包,其中可包含一行图像像素数据。其中,pix及图中用“---”表示的省略部分为图像像素数据,消隐开始(blanking start,BS)为控制符号,VB-ID为数据属性的指示信息,Mvid和Maud为时钟信息。时钟信息与第二个BE之间还可以承载第二数据包(secondary-data packet),其中包含音频数据和音频属性信息,另外还有填充符号。
MST模式是指将多个视频流数据在一个数据包中传输。如图4a所示,为MST模式下的数据包的一个结构示意图,一个MST数据包由64个时隙组成,其中第1个时隙承载多流传输包包头(multi-stream transport packet header,MTPH),其他时隙根据链路上数据流数和每个数据流占用带宽分配给各数据流,最多承载63个数据流。如图4b所示,为MST模式下的数据包的又一个结构示意图,与图4a不同的是,第1~5个时隙被分配用于承载1个视频流,即VC负载,其他时隙预留。
图5所示为MST模式时多流传输的拓扑结构示意图,其中DP源设备(DP source device)1和DP源设备2包含数据源(stream source)和DP数据包发射端(DP packet Tx);DP分支设备(branch device)1和DP分支设备2是转发设备,每个DP分支设备包含至少一个DP数据包第二传输设备和至少一个DP数据包发射端,用于汇聚或者分离数据流;DP信宿设备(sink device)包含一个DP第二传输设备,该设备接收到数据之后进行播放。通过转发设备可以实现图1中所示的菊花链连接方式。
图6所示为辅通道传输数据包的结构示意图,辅通道数据包传输以一个SYNC符号开始,以一个STOP符号结束,其中COMM为命令类型,ADDR为地址,LEN为数据长度,DATA为数据。
由图2所示的DP接口的内部结构可以看出,DP接口之间连接需要11根线缆,所需线缆数量较多,造成成本增加,线缆部署复杂,不满足车载场景部署要求,因此,需要减少数据传输所需的线缆。
本申请提供了一种数据处理方案,通过对待发送的第一数据包进行处理,并传输处理后的第二数据包,而不是直接传输第一数据包,可以减少数据传输所需的线缆。
如图7所示,为本申请实施例提供的一种数据处理方法的流程示意图,该方法可以包括以下步骤:
S101.第一传输设备接收第一数据包。
该第一传输设备可以位于提供音视频数据源的电子设备中。第一传输设备可以从电子设备内部的处理器上的DP接口接收第一数据包,即该第一数据包为DP数据包。该第一数据包可以包括主链路数据,辅通道数据,或者主链路数据和辅通道数据。
进一步地,若该第一数据包包括主链路数据,由于主链路数据包括一个或多个通道的数据,因此,第一传输设备还可以将第一数据包中的主链路数据映射成在单通道上传输的数据包,即单通道数据包。
S102.第一传输设备处理第一数据包,得到第二数据包。
其中,该第二数据包包括包头、负载和包尾。
由于第一数据包中包括主链路数据和/或辅通道数据,因此,包头用于指示负载的数据类型,负载包括第一数据包的内容,数据类型包括主链路数据和辅通道数据中的至少一种。具体地,该包头可以包括第一业务类型字段,该第一业务类型字段用于指示负载的数据类型。该第一业务类型字段可以包括2个比特。例如,第一数据包包括主链路数据,则第一业务类型字段的取值为“00”,用于指示负载的数据类型为主链路数据;又例如,第一数据包包括辅通道数据,则第一业务类型字段的取值为“01”,用于指示负载的数据类型为辅通道数据;又例如,第一数据包包括主链路数据和辅通道数据,则第一业务类型字段的取值为“10”,用于指示负载的数据类型为主链路数据和辅通道数据。
该包头还可以用于指示负载的长度。具体地,该包头可以包括负载长度字段。第二数据包中负载的长度可以以字节为单位。第二传输设备根据包头所指示的该负载的长度,可以知道第二数据包的负载的长度,用于判断第二数据包的边界。
该包头还用于指示第二数据包的序号。第二传输设备可以根据该序号进行计数,以便检测是否丢包,可以提高数据传输的可靠性。具体地,该包头可以包括序号字段,该序号字段可以用二进制比特表示,且可以循环计数。例如,第一传输设备一段时间内发送的第二数据包数量为32个,则可以用5个比特作为第二数据包的序号。假设当前封装的第二数据包为第4个数据包,则该序号字段的取值为“00011”;假设当前封装的第二数据包为第5个数据包,则该序号字段的取值为“00100”,以此类推。
进一步地,若第一传输设备接收到的是工作在SST模式下的DP发射端发送的第一数据包(即第一数据包为主链路数据或者第二数据包的数据类型为主链路数据),如图3所示,由于第一数据包较长,可以把第一数据包进行分段。具体地,可以限定每个数据包中的字节数来进行分段,分为几段传输,一个第二数据包中承载主链路数据包的一段。则包头还可以用于指示主链路数据的分段的数量。具体地,该包头可以包括分段数的字段,该分段数的字段用于指示负载中包含的主链路数据的分段的数量,即表示主链路数据分段的总数。例如,假设将第一数据包分为16段,则可以用4个比特来表示分段数。
作为一个示例,如果第二数据包的数据类型为主链路数据,则第二数据包的格式可以为如下表1所示:
表1
Figure PCTCN2021081977-appb-000001
Figure PCTCN2021081977-appb-000002
在表1中,该包头包括32个比特(即4个字节),当然对包头的大小和各字段的大小可以不作限定。该包头包括第一业务类型、分段数和序号字段,其余字段为预留字段。其中,第一业务类型字段用于指示当前数据包为主链路业务数据。分段数字段用于指示主链路数据包包括几个分段。序号字段用于指示是第几个数据包。负载长度字段用于指示当前数据包的负载最大可以是65527*8个比特。可选地,包尾可以包括循环冗余校验(cyclic redundancy check,CRC)位。
作为又一个示例,如果第二数据包的数据类型为辅通道数据,则第二数据包的格式可以为如下表2所示:
表2
Figure PCTCN2021081977-appb-000003
由于如图6所示的辅通道数据包相比SST模式的主链路数据包较小,在封装之前,可以不对辅通道数据进行分段,因而,辅通道数据的封装包头中可以不包括分段数这个字段。其中,第一业务类型字段用于指示当前数据包为辅通道业务数据。序号字段用于指示是第几个数据包。负载长度字段用于指示当前数据包的负载最大可以是65527*8个比特。可选地,包尾可以包括CRC校验位。其中,负载承载的是如图6所示的DP辅通道数据包SYNC和STOP之间的部分。
如果第一数据包包括主链路数据和辅通道数据,则可以以串接的方式在第二数据包中依次封装辅通道数据包的包头、负载和包尾,以及主链路数据包的包头、负载和包尾。辅通道数据包的数据格式可参考表2,主链路数据包的数据格式可参考表1。
通过对DP数据包进行封装,第二数据包可以对DP各通道上的数据进行区分。
进一步地,传输芯片之间除了传输DP业务,还可以传输其它类型的业务,例如高清多媒体接口(high definition multimedia interface,HDMI)业务,因此,第二数据包的包头还可以进一步指示该第二数据包包括DP数据。具体地,该包头可以包括第二业务类型字段,该第二业务类型字段用于指示该第二数据包包含DP数据。从而,通过第二业务类型字段可以区分是DP业务还是其它非DP业务,可以使DP业务和其它业务在同一通道上同时传输。例如,假设传输的业务类型有16中,该第二业务类型字段可以包括4个比特,该第二业务类型的字段取值为“00”时,用于指示该第二数据包为DP数据包;该第二业务类型的字段取值为其它值,分别用于指示该第二数据包为其它业务数据包。
作为一个示例,如果第二数据包的数据类型为主链路数据,则第二数据包的格式可以为如下表3所示:
表3
Figure PCTCN2021081977-appb-000004
与表1所示不同的是,该第二数据包的包头还包括第二业务类型字段,用于指示该第二数据包包含DP数据。其它字段的含义与表1相同。
作为又一个示例,如果第二数据包的数据类型为辅通道数据,则第二数据包的格式可以为如下表4所示:
表4
Figure PCTCN2021081977-appb-000005
与表2所示不同的是,该第二数据包的包头还包括第二业务类型字段,用于指示该第二数据包包含DP数据。其它字段的含义与表2相同。
进一步地,对于主链路数据,第二数据包的包头还可以用于指示DP支持的传输模式。具体地,该包头可以包括传输模式字段,该传输模式用于指示DP的传输模式是SST模式或MST模式。通过该传输模式字段,可以使得第二传输设备在接收到第二数据包后,可以根据包头所指示的传输模式对第二数据包进行不同的转换处理。
进一步地,当传输模式字段指示DP的传输模式是MST模式时,第二数据包的包头还可以用于指示负载中包括的数据流的数量。具体地,该包头可以包括流数量字段,该流数量字段用于指示负载中包括的数据流的数量。
在一个示例中,如果第二数据包的数据类型为主链路数据,则第二数据包的格式可以为如下表5所示:
表5
Figure PCTCN2021081977-appb-000006
在表5中,第二业务类型字段用于指示该第二数据包包含DP数据;第一业务类型字段用于指示该第二数据包为主链路数据;传输模式自动用于指示DP支持SST模式或MST模式;当传输模式为MST模式时,流数量字段为有效值,用于指示负载中包括几个复用的数据流;当传输模式为SST模式时,分段数字段为有效值,用于指示主链路数据包包括几个分段。其他字段的含义与表3相同。
S103.第一传输设备向第二传输设备发送第二数据包。相应地,第二传输设备接收该第二数据包。
第一传输设备对第一数据包进行封装后,得到第二数据包,可以通过一根同轴线或一双绞线等向另一电子设备中的第二传输设备发送该第二数据包,而无需更多的线缆。该另一电子设备可以是显示屏。
S104.第二传输设备根据包头解封装第二数据包。
第二传输设备接收到第二数据包后,可以先解析该第二数据包中的包头,根据该包头解封装第二数据包。
具体地,第二传输设备根据包头中的序号字段,可以获知接收到的是第几个数据包;根据包头中的第一业务类型字段,可以获知该第二数据包为主链路数据或辅通道数据;如果第二数据包的数据类型为主链路数据,且DP发射端支持SST模式,则根据包头中的分段数,可以获知接收到的是主链路数据包括几个分段;根据包头中的负载长度字段可以获知该第二数据包的负载的长度,从而解析相应长度的数据。
进一步地,还可以根据包头中的第二业务类型字段,可以获知接收到的第二数据包包含DP数据,或者其它业务数据。
进一步地,如果第一业务类型字段用于指示数据类型为主链路数据,且传输模式为MST模式,则可以根据包头中的流数量可以获知负载中包括几个复用的数据流。
进一步地,若该第二数据包的数据类型为主链路数据,第二传输设备根据包头解封装第二数据包之后,还可以将单通道的主链路数据映射到一个或多个通道上。
下面示例性地描述将上述方法应用到具体的场景中,如车载场景中:
如图8所示,为示例的一种车载场景中的DP数据的处理示意图,传输芯片1位于车机中,传输芯片1与车机的系统级芯片(system on chip,SoC)中的DP发射端(DP Tx)连接。车机与显示器1连接,车机用于给显示器1提供音视频数据源。具体地,在本实施例中,车机的传输芯片1与显示器1的传输芯片2连接,可以通过双绞线或同轴线等连接。在显示器1中,传输芯片2与屏幕中的DP第二传输设备(DP Rx)连接。车机中的SoC将DP数据包通过DP发射端传输给传输芯片1。其中,传输芯片1和传输芯片2为满足车载场景要求的远距离传输芯片。DP发射端和DP第二传输设备可以工作在SST模式,也可以工作在MST模式。传输芯片1采用如上所述的封装格式将从DP发射端接收到的DP数据进行封装,然后经由其物理层通过双绞线或同轴线传输至传输芯片2的物理层,传输芯片2解析接收到的封装后的数据包,得到该封装后的数据包的包头,并根据该包头对该封装后的数据包进行解封装,得到DP数据包。可选地,如果传输芯片1将从DP发射端接收到的DP数据为主链路数据,则传输芯片1在对该DP数据封装之前,先将该DP数据从一个或多个通道(例如,1/2/4个通道)映射成单通道数据包,再进行封装。相应地,传输芯片2在对封装后的数据包解封装得到DP数据后,将该DP数据包映射到一个或多个通道上。从而,传输芯片2可以将DP数据传输给DP第二传输设备,在屏幕上进行显示。
如图9所示,为示例的另一种车载场景中的DP数据的处理示意图,该车机依次连接显示器1和显示器2,车机作为音视频数据的输出端,将音视频数据输出到两个显示器。具体地,与图8不同的是,显示器1的传输芯片2除连接显示器1的DP第二传输设备外,还连接显示器2的传输芯片2,即显示器1和显示器2之间通过菊花链连接。在显示器2中,传输芯片2与屏幕中的DP第二传输设备连接。其中,传输芯片1的工作原理与图8所示场景中传输芯片1的工作原理相同。图9中的显示器1中的传输芯片2与图8中的显示器1的传输芯片2不同的是,图9中的显示器1的传输芯片2在解封装得到DP数据后,如果是MST模式下的主链路数据,该主链路数据可能包括一个或多个数据流,需要对解封装后得到的DP数据进行分流。将解封装后得到的DP数据中分流给显示器1的DP数据包映射到一个或多个通道上,并传输给显示器1的DP第二传输设备,并且将解封装后得到的DP数据中分流给显示器2的数据流重新进行封装,并经由物理层通过同轴线或双绞线传输给显示器2的传输芯片2。显示器2的传输芯片2的工作原理与图8所示的显示器1的传输芯片2的工作原理相同。
如图10所示,为示例的又一种车载场景中的DP数据的处理示意图,与图9不同的是,车机中的传输芯片1有两个输出接口,两个输出接口的内容可以是不同的,需要将DP发射端的数据进行分流。具体地,DP发射端支持MST模式,DP数据包包括多个数据流,传输芯片1首先对该DP数据包进行分流,例如,该DP数据包包括8个数据流,数据流1~数据流5需要通过显示器1和显示器2显示,数据流6~数据流8需要通过显示器3显示,则传输芯片1将一个或多个通道上传输的数据流1~数据流5映射成单通道数据包,根据上述的封装格式对数据流1~数据流5进行封装,经由物理层通过双绞线或同轴线传输给显示器1的传输芯片2。并且传输芯片1将一个或多个通道上传输的数据流6~数据流8映射成单通道数据包,根据上述的封装格式对数据流6~数据流8进行封装,经由物理层通过双绞 线或同轴线传输给显示器3的传输芯片2。显示器1的传输芯片2接收到封装后的数据包后,解析该数据包,获得包头,根据包头对封装后的数据包进行解封装,得到数据流1~数据流5。假设数据流1~数据流3要在显示器1的屏幕上进行显示,数据流4~数据流5要在显示器2的屏幕上进行显示,则显示器1的传输芯片2首先对数据流1~数据流5进行分流,分流为数据流1~数据流3和数据流4~数据流5;然后将数据流1~数据流3对应的数据包映射到一个或多个通道上,并将映射到一个或多个通道上的数据流1~数据流3传输至显示器1的DP第二传输设备,在显示器1的屏幕上进行显示;并将数据流4~数据流5重新进行封装,经由物理层通过双绞线或同轴线传输给显示器2的传输芯片2。显示器2的传输芯片2接收到封装后的数据流4~数据流5后,对封装后的数据流4~数据流5进行解封装、通道转换。另外,传输芯片1将数据流6~数据流8根据上述封装格式进行封装,经由物理层通过双绞线或同轴线传输给显示器3的传输芯片2。显示器3的传输芯片2接收到封装后的数据流6~数据流8后,对封装后的数据流6~数据流8进行解封装、通道转换。
根据本申请实施例提供的一种数据处理方法,通过对待发送的第一数据包进行处理,并传输处理后的第二数据包,而不是直接传输第一数据包,可以减少数据传输所需的线缆。
基于上述数据处理方法的同一构思,还提供了一种传输设备。
上述方法中的部分或全部可以通过软件或固件来实现,如图11所示,提供了一种传输设备的结构示意图,该传输设备用于执行上述数据处理方法。具体地,该传输设备1000包括:收发单元11和处理单元12。其中:
收发单元11,用于接收第一数据包,所述第一数据包包括主链路数据和/或辅通道数据;
处理单元12,用于处理所述第一数据包,得到第二数据包,其中,所述第二数据包包括包头和负载,所述包头用于指示所述负载的数据类型,所述数据类型包括所述主链路数据和所述辅通道数据中的至少一种;
所述收发单元11,还用于发送所述第二数据包。
在一种可能的实现中,所述第一数据包包括主链路数据;
所述处理单元12,还用于将所述第一数据包中的主链路数据映射成单通道数据包,所述主链路数据包括一个或多个通道的数据。
在又一种可能的实现中,所述包头还用于指示所述第二数据包的序号或所述负载的长度中的至少一项。
在又一种可能的实现中,所述负载的数据类型为主链路数据时,所述包头还用于指示所述主链路数据的分段的数量。
在又一种可能的实现中,所述包头还用于指示显示器接口支持的传输模式,所述传输模式包括单流传输模式或多流传输模式。
在又一种可能的实现中,所述传输模式为多流传输模式,所述包头还用于指示所述负载中包括的数据流的数量。
在又一种可能的实现中,所述包头还用于指示所述第二数据包包含显示器接口DP数据。
有关上述各单元的具体实现可参考图7所示的方法实施例中第一传输设备的相关描述。
如图12所示,提供了又一种传输设备的结构示意图,该传输设备用于执行上述数据处理方法。具体地,该传输设备2000包括:收发单元21和处理单元22。其中:
收发单元21,用于接收第二数据包,所述第二数据包包括包头和负载,所述包头用于指示所述负载的数据类型,所述数据类型包括主链路数据和辅通道数据中的至少一种;
处理单元22,用于解封装所述第二数据包,得到第一数据包,所述第一数据包包括主链路数据和/或辅通道数据。
在一种可能的实现中,所述第一数据包包括主链路数据;
所述处理单元22,还用于将所述单通道数据包映射到一个或多个通道上。
在又一种可能的实现中,所述包头还用于指示所述第二数据包的序号或所述负载的长度中的至少一项。
在又一种可能的实现中,所述负载的数据类型为主链路数据时,所述包头还用于指示所述主链路数据的分段的数量。
在又一种可能的实现中,所述包头还用于指示显示器接口支持的传输模式,所述传输模式包括单流传输模式或多流传输模式。
在又一种可能的实现中,所述传输模式为多流传输模式,所述包头还用于指示所述负载中包括的数据流的数量。
在又一种可能的实现中,所述包头还用于指示所述第二数据包包含显示器接口DP数据。
有关上述各单元的具体实现可参考图7所示的方法实施例中第二传输设备的相关描述。
可选的,上述传输设备在具体实现时可以是芯片或者集成电路。
可选的,当上述实施例的数据处理方法中的部分或全部通过软件或固件来实现时,可以通过图13提供的一种传输设备3000来实现。如图13所示,该传输设备3000可包括:处理器31(传输芯片中的处理器31可以是一个或多个,图13中以一个处理器为例)。
其中,处理器31用于执行图7中第一传输设备/第二传输设备所执行的方法步骤。
可选的,用于存储程序的存储器32位于该传输芯片之外,处理器31通过电路或电线与存储器32连接,用于读取并执行存储器32中存储的程序。
处理器31可以是中央处理器(central processing unit,CPU),网络处理器(network processor,NP),或WLAN设备。
处理器31还可以进一步包括硬件芯片。上述硬件芯片可以是专用集成电路(application-specific integrated circuit,ASIC),可编程逻辑器件(programmable logic device,PLD)或其组合。上述PLD可以是复杂可编程逻辑器件(complex programmable logic device,CPLD),现场可编程逻辑门阵列(field-programmable gate array,FPGA),通用阵列逻辑(generic array logic,GAL)或其任意组合。
存储器32可以包括易失性存储器(volatile memory),例如随机存取存储器(random-access memory,RAM);存储器也可以包括非易失性存储器(non-volatile memory),例如快闪存储器(flash memory),硬盘(hard disk drive,HDD)或固态硬盘(solid-state drive,SSD);存储器还可以包括上述种类的存储器的组合。
如图14所示,还提供了一种数据处理系统,该系统4000包括上述传输设备1000和传输设备2000。
本申请实施例还提供了一种计算机可读存储介质,包括计算机指令,当所述计算机指令在计算机上运行时,上述实施例中的方法被执行。
本申请实施例还提供了一种包含指令的计算机程序产品,包括计算机指令,当该计算机指令在计算机上运行时,使得计算机执行上述实施例中的方法。
需要说明的是,本发明实施例中的术语“多个”是指两个或两个以上,鉴于此,本发明实施例中也可以将“多个”理解为“至少两个”。“和/或”,描述关联对象的关联关系,表示可以存在三种关系,例如,A和/或B,可以表示:单独存在A,同时存在A和B,单独存在B这三种情况。另外,字符“/”,如无特殊说明,一般表示前后关联对象是一种“或”的关系。
所属领域的技术人员可以清楚地了解到,为描述的方便和简洁,上述描述的系统、装置和单元的具体工作过程,可以参考前述方法实施例中的对应过程,在此不再赘述。
在本申请所提供的几个实施例中,应该理解到,所揭露的系统、装置和方法,可以通过其它的方式实现。例如,该单元的划分,仅仅为一种逻辑功能划分,实际实现时可以有另外的划分方式,例如,多个单元或组件可以结合或者可以集成到另一个系统,或一些特征可以忽略,或不执行。所显示或讨论的相互之间的耦合、或直接耦合、或通信连接可以是通过一些接口,装置或单元的间接耦合或通信连接,可以是电性,机械或其它的形式。
作为分离部件说明的单元可以是或者也可以不是物理上分开的,作为单元显示的部件可以是或者也可以不是物理单元,即可以位于一个地方,或者也可以分布到多个网络单元上。可以根据实际的需要选择其中的部分或者全部单元来实现本实施例方案的目的。
在上述实施例中,可以全部或部分地通过软件、硬件、固件或者其任意组合来实现。当使用软件实现时,可以全部或部分地以计算机程序产品的形式实现。该计算机程序产品包括一个或多个计算机指令。在计算机上加载和执行该计算机程序指令时,全部或部分地产生按照本申请实施例的流程或功能。该计算机可以是通用计算机、专用计算机、计算机网络、或者其他可编程装置。该计算机指令可以存储在计算机可读存储介质中,或者通过该计算机可读存储介质进行传输。该计算机指令可以从一个网站站点、计算机、服务器或数据中心通过有线(例如同轴电缆、光纤、数字用户线(digital subscriber line,DSL))或无线(例如红外、无线、微波等)方式向另一个网站站点、计算机、服务器或数据中心进行传输。该计算机可读存储介质可以是计算机能够存取的任何可用介质或者是包含一个或多个可用介质集成的服务器、数据中心等数据存储设备。该可用介质可以是只读存储器(read-only memory,ROM),或随机存取存储器(random access memory,RAM),或磁性介质,例如,软盘、硬盘、磁带、磁碟、或光介质,例如,数字通用光盘(digital versatile disc,DVD)、或者半导体介质,例如,固态硬盘(solid state disk,SSD)等。

Claims (35)

  1. 一种数据处理方法,其特征在于,所述方法应用于第一传输设备,所述方法包括:
    接收第一数据包,所述第一数据包包括主链路数据和/或辅通道数据;
    处理所述第一数据包,得到第二数据包,其中,所述第二数据包包括包头和负载,所述包头用于指示所述负载的数据类型,所述数据类型包括所述主链路数据和所述辅通道数据中的至少一种;
    发送所述第二数据包。
  2. 根据权利要求1所述的方法,其特征在于,所述第一数据包包括主链路数据,所述处理所述第一数据包,得到第二数据包之前,所述方法还包括:
    将所述第一数据包中的主链路数据映射成单通道数据包,所述主链路数据包括一个或多个通道的数据。
  3. 根据权利要求1或2所述的方法,其特征在于,所述包头还用于指示所述第二数据包的序号或所述负载的长度中的至少一项。
  4. 根据权利要求1-3任一项所述的方法,其特征在于,所述负载的数据类型为主链路数据时,所述包头还用于指示所述主链路数据的分段的数量。
  5. 根据权利要求1-4任一项所述的方法,其特征在于,所述包头还用于指示显示器接口支持的传输模式,所述传输模式包括单流传输模式或多流传输模式。
  6. 根据权利要求5所述的方法,其特征在于,所述传输模式为多流传输模式,所述包头还用于指示所述负载中包括的数据流的数量。
  7. 根据权利要求1-6中任一项所述的方法,其特征在于,所述包头还用于指示所述第二数据包包含显示器接口DP数据。
  8. 一种数据处理方法,其特征在于,所述方法应用于第二传输设备,所述方法包括:
    接收第二数据包,所述第二数据包包括包头和负载,所述包头用于指示所述负载的数据类型,所述数据类型包括主链路数据和辅通道数据中的至少一种;
    解封装所述第二数据包,得到第一数据包,所述第一数据包包括主链路数据和/或辅通道数据。
  9. 根据权利要求8所述的方法,其特征在于,所述第一数据包包括主链路数据,所述主链路数据为单通道数据包,所述解封装所述第二数据包,得到第一数据包之后,所述方 法还包括:
    将所述单通道数据包映射到一个或多个通道上。
  10. 根据权利要求8或9所述的方法,其特征在于,所述包头还用于指示所述第二数据包的序号或所述负载的长度中的至少一项。
  11. 根据权利要求8-10任一项所述的方法,其特征在于,所述负载的数据类型为主链路数据时,所述包头还用于指示所述主链路数据的分段的数量。
  12. 根据权利要求8-11任一项所述的方法,其特征在于,所述包头还用于指示显示器接口支持的传输模式,所述传输模式包括单流传输模式或多流传输模式。
  13. 根据权利要求12所述的方法,其特征在于,所述传输模式为多流传输模式,所述包头还用于指示所述负载中包括的数据流的数量。
  14. 根据权利要求8-13中任一项所述的方法,其特征在于,所述包头还用于指示所述第二数据包包含显示器接口DP数据。
  15. 一种传输设备,其特征在于,包括:
    收发单元,用于接收第一数据包,所述第一数据包包括主链路数据和/或辅通道数据;
    处理单元,用于处理所述第一数据包,得到第二数据包,其中,所述第二数据包包括包头和负载,所述包头用于指示所述负载的数据类型,所述数据类型包括所述主链路数据和所述辅通道数据中的至少一种;
    所述收发单元,还用于发送所述第二数据包。
  16. 根据权利要求15所述的传输设备,其特征在于,所述第一数据包包括主链路数据;
    所述处理单元,还用于将所述第一数据包中的主链路数据映射成单通道数据包,所述主链路数据包括一个或多个通道的数据。
  17. 根据权利要求15或16所述的传输设备,其特征在于,所述包头还用于指示所述第二数据包的序号或所述负载的长度中的至少一项。
  18. 根据权利要求15-17任一项所述的传输设备,其特征在于,所述负载的数据类型为主链路数据时,所述包头还用于指示所述主链路数据的分段的数量。
  19. 根据权利要求15-18任一项所述的传输设备,其特征在于,所述包头还用于指示显示器接口支持的传输模式,所述传输模式包括单流传输模式或多流传输模式。
  20. 根据权利要求19所述的传输设备,其特征在于,所述传输模式为多流传输模式,所述包头还用于指示所述负载中包括的数据流的数量。
  21. 根据权利要求15~20中任一项所述的传输设备,其特征在于,所述包头还用于指示所述第二数据包包含显示器接口DP数据。
  22. 一种传输设备,其特征在于,包括:
    收发单元,用于接收第二数据包,所述第二数据包包括包头和负载,所述包头用于指示所述负载的数据类型,所述数据类型包括主链路数据和辅通道数据中的至少一种;
    处理单元,用于解封装所述第二数据包,得到第一数据包,所述第一数据包包括主链路数据和/或辅通道数据。
  23. 根据权利要求22所述的传输设备,其特征在于,所述第一数据包包括主链路数据;
    所述处理单元,还用于将所述单通道数据包映射到一个或多个通道上。
  24. 根据权利要求22或23所述的传输设备,其特征在于,所述包头还用于指示所述第二数据包的序号或所述负载的长度中的至少一项。
  25. 根据权利要求22-24任一项所述的传输设备,其特征在于,所述负载的数据类型为主链路数据时,所述包头还用于指示所述主链路数据的分段的数量。
  26. 根据权利要求22-25任一项所述的传输设备,其特征在于,所述包头还用于指示显示器接口支持的传输模式,所述传输模式包括单流传输模式或多流传输模式。
  27. 根据权利要求26所述的传输设备,其特征在于,所述传输模式为多流传输模式,所述包头还用于指示所述负载中包括的数据流的数量。
  28. 根据权利要求22-27任一项所述的传输设备,其特征在于,所述包头还用于指示所述第二数据包包含显示器接口DP数据。
  29. 一种数据处理系统,其特征在于,包括如权利要求15-21任一项所述的传输设备和/或如权利要求22-28任一项所述的传输设备。
  30. 一种传输设备,其特征在于,包括:一个或多个处理器;所述处理器用于执行存储器中存储的程序,当所述程序被执行时,用于实现如权利要求1-7任一项所述的方法。
  31. 根据权利要求30所述的传输设备,其特征在于,所述存储器位于所述传输设备之外。
  32. 一种传输设备,其特征在于,包括:一个或多个处理器;所述处理器用于执行存储器中存储的程序,当所述程序被执行时,用于实现如权利要求8-14任一项所述的方法。
  33. 根据权利要求32所述的传输设备,其特征在于,所述存储器位于所述传输设备之外。
  34. 一种计算机可读存储介质,其上存储有计算机程序,其特征在于,所述程序被处理器执行时实现如权利要求1-14任一项所述的方法。
  35. 一种计算机程序产品,其特征在于,所述计算机程序产品在计算机上被执行时,实现权利要求1-14任一项所述的方法。
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