WO2021087923A1 - 一种传输信息的方法和装置 - Google Patents

一种传输信息的方法和装置 Download PDF

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Publication number
WO2021087923A1
WO2021087923A1 PCT/CN2019/116419 CN2019116419W WO2021087923A1 WO 2021087923 A1 WO2021087923 A1 WO 2021087923A1 CN 2019116419 W CN2019116419 W CN 2019116419W WO 2021087923 A1 WO2021087923 A1 WO 2021087923A1
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Prior art keywords
cid
ethernet frame
side device
information
context information
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PCT/CN2019/116419
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English (en)
French (fr)
Inventor
范强
娄崇
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 CN201980099561.2A priority Critical patent/CN114270792B/zh
Priority to PCT/CN2019/116419 priority patent/WO2021087923A1/zh
Publication of WO2021087923A1 publication Critical patent/WO2021087923A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
    • H04L9/40—Network security protocols

Definitions

  • This application relates to the field of communications, and more specifically, to a method and device for transmitting information.
  • Ethernet is a local area network communication technology.
  • IEEE 802.3 working group organized by the Institute of Electrical and Electronics Engineers (IEEE) has formulated the technical standard for Ethernet, which stipulates the connection of the physical layer, electronic signals and The content of the media access control (MAC) protocol.
  • the current industrial control scene uses wired Ethernet to transmit data.
  • the data transmitted based on the Ethernet communication technology can be referred to as Ethernet data for short.
  • the transmission of Ethernet data can also be realized through wireless communication.
  • the console sends instructions to the machine equipment through the wireless network, and the machine equipment executes corresponding actions based on the received instructions and reports its own status information to the server.
  • the transmission of industrial control data through the wireless network avoids the cost, security, maintenance and many other issues that exist in the deployment of wired networks, and can support the flexible deployment and mobility of industrial control nodes.
  • the ethernet header compression (EHC) mechanism only supports the compression of one ether frame format, but in fact, there are many ether frame formats in industrial applications.
  • EHC ethernet header compression
  • the present application provides a method and device for transmitting information, which helps prevent the decompression side equipment from misunderstanding the compression side equipment.
  • a method for transmitting information includes: a decompression side device receives an Ethernet frame from a compression side device and first indication information, the first indication information is used to indicate whether to establish or update the decompression side Context information; when the first indication information indicates to establish or update context information, the decompression side device establishes or updates the context information on the decompression side according to the Ethernet frame; or, when the first indication information indicates not to establish or update context information , The decompression side device does not establish or update the context information of the decompression side according to the Ethernet frame.
  • the overcompression side device indicates to the decompression side device whether the data packet carries context information, or whether the decompression side device needs to establish or update the context information, and the compression side can support multiple formats of Ethernet frames
  • the device on the compression side can directly pass the original Ethernet frame to the device on the decompression side, and instruct not to carry context information or indicate not to establish or update the context information, so as to prevent the decompression side device from understanding errors, resulting in Error in EHC function.
  • the decompression side device receiving the Ethernet frame and the first indication information from the compression side device includes: the decompression side device receives packet data from the compression side device Convergence protocol data protocol data unit PDCP data PDU, the PDCP data PDU includes the first Ethernet frame and the first indication information.
  • the decompression side device can clarify the intention of the compression side device, avoiding misunderstandings by the decompression side device, and also helping to save signaling overhead .
  • the PDCP data PDU includes an Ethernet header compression header
  • the Ethernet header compression header includes the first indication information
  • the first indication information is used for Indicate whether the Ethernet frame header compression header includes the context information identifier CID and the header format indication F field, and when the first indication information is used to indicate the existence of the CID and the F field, it indicates that the context information is established or updated.
  • the indication information is used to indicate that when the CID and the F field do not exist, the context information is not to be established or not to be updated; or, the Ethernet frame header compression header includes the CID and the F field, and the first indication information is used to indicate whether according to The CID and the F field establish or update the context information on the decompression side; or, the first indication information is also used to indicate that the Ethernet frame is a complete Ethernet frame or a compressed Ethernet frame; or, the Ethernet frame header compression header includes the CID, the CID includes the first indication information.
  • the first indication information can be carried in the Ethernet frame header compression header in the PDCP data PDU, and the decompression side device can clarify the intention of the compression side device to avoid misunderstandings by the decompression side device, and also help to save trust Order overhead.
  • the F field is located before the first indication information, and the F field indicates that the Ethernet frame is a complete Ethernet frame.
  • the F field is located before the first indication information, and the decompression side device may parse the F field first, and when the F field indicates that the Ethernet frame is a complete Ethernet frame, then parse the first indication information; When the F field indicates that the Ethernet frame is a compressed Ethernet frame, the first indication information may be skipped.
  • the PDCP data PDU includes a PDCP header
  • the PDCP header includes the first indication information
  • the first indication information is used to indicate the data in the PDCP data PDU
  • the Ethernet frame header compression header includes the CID and F fields
  • the first indication information is used to indicate the existence of the CID and the F field, indicating the establishment or update of context information
  • the first indication information is used to indicate the CID and the F field
  • the F field does not exist, it indicates that the context information is not to be established or not updated; or, the Ethernet frame header compression header includes the CID and the F field, and the first indication information is used to indicate whether to establish or not based on the CID and the F field. Update the context information on the decompression side.
  • the first indication information can be carried in the PDCP header in the PDCP data PDU, and the decompression side device can clarify the intention of the compression side device, avoiding misunderstandings by the decompression side device, and also helping to save signaling overhead .
  • the method further includes: when the first indication information indicates that the context information is not to be established or not to be updated, not feeding back to the compression side device.
  • the first indication information received by the decompression side indicates that the context information is not to be established or not updated, it may not be fed back to the compression side device, which helps to avoid signaling overhead.
  • a method for transmitting information includes: a decompression side device receives a first Ethernet frame and a first CID from a compression side device; and the decompression side device establishes or updates the first Ethernet frame according to the first Ethernet frame. Context information corresponding to the first CID; the decompression side device sends first feedback information to the compression side device and starts a first timer, the first feedback information is used to indicate that the context information has been established or updated; During the running period of a timer, no feedback is given to the received second ether frame, and the ether frame header compression header of the second ether frame includes the first CID.
  • the feedback signaling is restricted to be sent only once or several times within the timer duration, or a counter is introduced in the decompression side device to limit the number of received multiple data packets Send feedback signaling a few times, thereby helping to reduce feedback signaling overhead and resource occupation.
  • the method further includes: the decompression-side device receives a third Ethernet frame and the first CID from the compression-side device; Frame, update the context information corresponding to the first CID; the decompression side device sends second feedback information to the compression side device and restarts the first timer, the second feedback information is used to indicate that the context information corresponding to the first CID has been update completed.
  • the method further includes: the decompression side device receives a fourth Ethernet frame and a second CID from the compression side device, the second CID and the first CID Different; the decompression side device establishes or updates the context information corresponding to the second CID according to the fourth Ethernet frame; the decompression side device sends the third feedback information to the compression side device and starts the second timer, and the third feedback information is used To indicate that the context information corresponding to the second CID has been established or updated, wherein during the running period of the second timer, no feedback is given to the received fifth Ethernet frame, the Ethernet frame header of the fifth Ethernet frame
  • the compression header includes the second CID.
  • different CIDs or context information can correspond to different timers, so for the same CID, the decompression side device can start the timer after sending feedback information to the compression side device, thereby helping to reduce feedback signaling overhead And the occupation of resources.
  • a method for transmitting information includes: the compression side device obtains an Ethernet frame; the compression side device sends the Ethernet frame and first indication information to the decompression side device, and the first indication information is used to indicate whether Create or update the context information on the decompression side.
  • the overcompression side device indicates to the decompression side device whether the data packet carries context information, or whether the decompression side device needs to establish or update context information, and the compression side can support multiple formats of Ethernet frames
  • the device on the compression side can directly pass the original Ethernet frame to the device on the decompression side, and instruct not to carry context information or indicate not to establish or update the context information, so as to prevent the decompression side device from understanding errors, resulting in Error in EHC function.
  • the sending the Ethernet frame and the first indication information to the decompression side device includes: the compression side device sends a PDCP data PDU to the decompression side device, the PDCP data PDU Includes the first Ethernet frame and the first indication information.
  • the PDCP data PDU includes an Ethernet header compression header
  • the Ethernet header compression header includes the first indication information
  • the first indication information is used for Indicates whether the Ethernet frame header compression header includes CID and F fields, and when the first indication information is used to indicate the existence of the CID and the F field, it indicates the establishment or update of context information, and when the first indication information is used to indicate the When the CID and the F field do not exist, it indicates that the context information is not to be established or not updated; or, the Ethernet frame header compression header includes the CID and the F field, and the first indication information is used to indicate whether according to the CID and the F field Establish or update the context information on the decompression side; or, the first indication information is also used to indicate that the Ethernet frame is a complete Ethernet frame or a compressed Ethernet frame; or, the Ethernet frame header compression header includes the CID, and the CID includes the The first instruction information.
  • the F field is located before the first indication information, and the F field indicates that the Ethernet frame is a complete Ethernet frame.
  • the PDCP data PDU includes a PDCP header
  • the PDCP header includes the first indication information, where the first indication information is used to indicate the data in the PDCP data PDU Whether the Ethernet frame header compression header includes the CID and F fields, and when the first indication information is used to indicate the existence of the CID and the F field, indicating the establishment or update of context information, when the first indication information is used to indicate the CID and the F field When the F field does not exist, it indicates that the context information is not to be established or not updated; or, the Ethernet frame header compression header includes the CID and the F field, and the first indication information is used to indicate whether to establish or not based on the CID and the F field. Update the context information on the decompression side.
  • the method further includes: when the first indication information is used to instruct to establish or update the context information of the decompression side, the compression side device receives the decompression side device sent Feedback information, which is used to indicate that the establishment or update of the context information of the decompression side device is completed.
  • a method for transmitting information includes:
  • the compression side device sends the first Ethernet frame and the first context information identifier CID to the decompression side device and starts the first timer; during the running period of the first timer, the compression side device sends the second Ethernet frame and the second Ethernet frame to the decompression side device.
  • First indication information where the first indication information is used to indicate that the decompression side device does not establish or update the context information, and the Ethernet header compression header of the second Ethernet frame includes the first CID.
  • the context information is restricted to be sent only once within the timer duration, so that the decompression side only triggers the sending of feedback signaling once or several times; or introducing a counter on the compression side to limit multiple Only a few packets in the data packet can send context information, so the decompression side will not send feedback signaling for each received data packet, which can reduce the overhead of EHC feedback signaling and the occupation of air interface resources.
  • the method further includes: the compression side device updates the context information corresponding to the first CID according to the third Ethernet frame; and the compression side device sends the first CID to the decompression side device. Three Ethernet frames and the first CID and restart the first timer.
  • the method further includes: the compression side device sends a fourth Ethernet frame and a second CID to the decompression side device and starts a second timer, the second CID and The first CID is different; during the running period of the second timer, the compression-side device sends a fifth Ethernet frame and second indication information to the decompression-side device, and the second indication information is used to indicate that the decompression-side device does not establish or does not The context information is updated, and the Ethernet frame header compression header of the fifth Ethernet frame includes the second CID.
  • the present application provides a device for transmitting information, which includes units or means for performing each step of the first aspect or the second aspect above.
  • the present application provides a device for transmitting information, including units or means for performing the steps of the third aspect or the fourth aspect.
  • the present application provides an information transmission device, including at least one processor, configured to connect with a memory to call a program in the memory to execute the method provided in the first aspect or the second aspect above.
  • the memory can be located inside the device or outside the device.
  • the processor includes one or more.
  • the present application provides a random access device, including at least one processor, configured to connect with a memory to call a program in the memory to execute the method provided in the third aspect or the fourth aspect.
  • the memory can be located inside the device or outside the device.
  • the processor includes one or more.
  • the present application provides a random access device, including at least one processor and an interface circuit, and the at least one processor is configured to execute the method provided in the above first aspect or the second aspect.
  • the present application provides a random access device, including at least one processor and an interface circuit, and the at least one processor is configured to execute the method provided in the above third aspect or the fourth aspect.
  • a terminal in an eleventh aspect, includes the device provided in any one of the above-mentioned fifth aspect to the tenth aspect.
  • a network device in a twelfth aspect, includes the device provided in any one of the fifth aspect to the tenth aspect.
  • the present application provides a program, which is used to execute the method provided in the first aspect or the second aspect when the program is executed by a processor.
  • this application provides a program that, when executed by a processor, is used to execute the method provided in the third or fourth aspect above.
  • this application provides a program product, such as a computer-readable storage medium, including the above program.
  • Fig. 1 is a schematic diagram of an Ethernet frame format provided by an embodiment of the present application.
  • FIG. 2 is a schematic diagram of a system architecture of the technical solution of an embodiment of the present application.
  • Fig. 3 is a schematic diagram of a PDCP data PDU according to an embodiment of the present application.
  • Fig. 4 is a schematic diagram of a PDCP header according to an embodiment of the present application.
  • FIG. 5 is a schematic flowchart of a method for transmitting information provided by an embodiment of the present application.
  • Fig. 6 is another schematic diagram of a PDCP header provided by an embodiment of the present application.
  • Fig. 7 is another schematic diagram of PDCP data PDU provided by an embodiment of the present application.
  • FIG. 8 is another schematic diagram of PDCP data PDU provided by an embodiment of the present application.
  • FIG. 9 is another schematic diagram of PDCP data PDU provided by an embodiment of the present application.
  • Fig. 10 is a schematic diagram of an Ethernet frame header compression header provided by an embodiment of the present application.
  • FIG. 12 is another schematic diagram of an Ethernet frame header compression header provided by an embodiment of the present application.
  • FIG. 13 is another schematic flowchart of a method for transmitting information provided by an embodiment of the present application.
  • FIG. 14 is a schematic diagram of the decompression side device restricting the number of times of feedback of feedback information through a timer in an embodiment of the present application.
  • FIG. 15 is a schematic diagram of the decompression side device restricting the number of times of feedback of feedback information through a counter in an embodiment of the present application.
  • FIG. 16 is another schematic flowchart of a method for transmitting information provided by an embodiment of the present application.
  • FIG. 17 is a schematic diagram of the compression side device restricting the number of times of feedback of feedback information through a timer in an embodiment of the present application.
  • FIG. 19 is a schematic block diagram of a device for transmitting information according to an embodiment of the present application.
  • FIG. 20 is another schematic block diagram of a device for transmitting information according to an embodiment of the present application.
  • FIG. 21 is another schematic block diagram of a device for transmitting information according to an embodiment of the present application.
  • FIG. 22 is another schematic block diagram of a device for transmitting information according to an embodiment of the present application.
  • FIG. 23 is a schematic structural diagram of an access network device provided by an embodiment of the present application.
  • FIG. 24 is a schematic structural diagram of a terminal device provided by an embodiment of the present application.
  • FIG. 25 is a schematic structural diagram of a core network device provided by an embodiment of the present application.
  • Terminal devices can include wireless terminals in industrial control, or terminals with similar requirements in other control systems, such as wireless terminals in self-driving (self-driving) and remote medical surgery (remote medical surgery).
  • Wireless terminal wireless terminal in smart grid, wireless terminal in transportation safety, wireless terminal in smart city, or wireless terminal in smart home, etc.
  • An access network device is a device in a wireless network, such as a radio access network (RAN) node that connects a terminal device to the wireless network.
  • RAN nodes are: gNB, transmission reception point (TRP), evolved Node B (evolved Node B, eNB), radio network controller (RNC), Node B (Node B) B, NB), base station controller (BSC), base transceiver station (BTS), home base station (for example, home evolved NodeB, or home Node B, HNB), baseband unit (baseband unit) , BBU), or wireless fidelity (Wifi) access point (AP), etc.
  • the access network device may include a centralized unit (CU) node, or a distributed unit (DU) node, or a RAN device including a CU node and a DU node.
  • the RAN includes a baseband device and a radio frequency device.
  • the baseband device can be implemented by one node or multiple nodes.
  • the radio frequency device can be implemented remotely from the baseband device or integrated into the baseband device. Or part of the remote part is integrated in the baseband device.
  • the RAN may include a baseband device and a radio frequency device, where the radio frequency device may be arranged remotely with respect to the baseband device, for example, a remote radio unit (RRU) may be arranged remotely with respect to the BBU.
  • RRU remote radio unit
  • the control plane protocol layer structure may include the radio resource control (RRC) layer, the packet data convergence protocol (PDCP) layer, the radio link control (RLC) layer, and the media interface. Access control (media access control, MAC) layer and physical layer and other protocol layer functions.
  • the user plane protocol layer structure can include the functions of the PDCP layer, the RLC layer, the MAC layer, and the physical layer; in one implementation, the PDCP layer can also include a service data adaptation protocol (SDAP) layer .
  • SDAP service data adaptation protocol
  • the functions of these protocol layers can be implemented by one node or multiple nodes; for example, in an evolution structure, the RAN can include a centralized unit (CU) and a distributed unit (DU).
  • CU centralized unit
  • DU distributed unit
  • Each DU can be centrally controlled by one CU.
  • CU and DU can be divided according to the protocol layer of the wireless network. For example, the functions of the PDCP layer and the above protocol layers are set in the CU, and the protocol layers below the PDCP, such as the RLC layer and the MAC layer, are set in the DU.
  • This type of protocol layer division is just an example, it can also be divided in other protocol layers, for example, in the RLC layer, the functions of the RLC layer and above protocol layers are set in the CU, and the functions of the protocol layers below the RLC layer are set in the DU; Or, in a certain protocol layer, for example, part of the functions of the RLC layer and the functions of the protocol layer above the RLC layer are set in the CU, and the remaining functions of the RLC layer and the functions of the protocol layer below the RLC layer are set in the DU. In addition, it can also be divided in other ways, for example, by time delay. The functions that need to meet the delay requirement for processing time are set in the DU, and the functions that do not need to meet the delay requirement are set in the CU.
  • the radio frequency device can be remote, not placed in the DU, can also be integrated in the DU, or part of the remote part is integrated in the DU, and there is no restriction here.
  • control plane (CP) and the user plane (UP) of the CU can also be separated and realized by dividing them into different entities, namely the control plane CU entity (CU-CP entity) and the user plane CU entity (CU-UP entity) ).
  • the signaling generated by the CU can be sent to the terminal through the DU, or the signaling generated by the terminal can be sent to the CU through the DU.
  • the DU may directly pass the protocol layer encapsulation and transparently transmit to the terminal or CU without analyzing the signaling. If the following embodiments involve the transmission of such signaling between the DU and the terminal, at this time, the sending or receiving of the signaling by the DU includes this scenario.
  • RRC or PDCP layer signaling will eventually be processed as PHY layer signaling and sent to the terminal, or converted from received PHY layer signaling. Under this architecture, the RRC or PDCP layer signaling can also be considered to be sent by the DU, or sent by the DU and radio frequency.
  • the access network device may be a CU node, or a DU node, or a RAN device including a CU node and a DU node.
  • the devices in the following embodiments of the present application may be located in different devices according to their realized functions.
  • 5G systems are being considered to support the transmission of business data in vertical industries.
  • the 5G system is used as the last hop of the industrial control network to realize wireless replacement of the last hop wired.
  • the Ethernet data generated by the console needs to be transmitted to the control node through the 5G system, and the Ethernet data generated by the corresponding control node also needs to be transmitted through the 5G system to reach the console.
  • Figure 1 shows a schematic diagram of an Ethernet frame format.
  • FIG. 1 it is a schematic diagram of the format of an IEEE 802.3 Ethernet frame, which includes: a 7-byte preamble, a 1-byte start of frame delimiter (SFD), 6 Byte destination MAC address, 6 bytes source MAC address, 2 bytes length/type (such as 802.1QTagType) field, 2 bytes tag control information (tagging control information (TAG)), 2 MAC client length/type in bytes, variable-length payload or payload, and 4-byte frame check sequence (FCS), where the payload can include data (such as MAC client data), optional
  • the payload of can also include padding fields.
  • a console controls several terminal devices, and the Ethernet addresses of the console and the terminal device are fixed.
  • a terminal device For a terminal device, it receives the data stream from the console.
  • the address field is filled with its own MAC address
  • the source address field is filled with the MAC address of the console.
  • the 802.1QTagType field and TAG control information are usually fixed; accordingly, the terminal device sends it to the control In the data stream of the station, the above-mentioned fields are usually fixed.
  • EHC ethernet header compression
  • the EHC function is executed at the PDCP layer
  • the preamble, SFD, and FCS fields in the Ethernet frame header can be uncompressed, and the destination address, source address, TAG related fields, and MAC client length/type fields can be compressed; the NR R16 standard agrees to only support one Ethernet frame format Compress
  • EHC uses the concept of context.
  • the compression side and decompression side associate a context identity (CID) with the value of the specific Ethernet frame header field to be compressed.
  • CID context identity
  • the compression side needs to transmit at least the complete Ethernet header.
  • the context ID to the decompression side, so as to establish context information for the CID on the decompression side;
  • the Ethernet frame generates an EHC header at the PDCP layer, and the EHC header includes: CID, the Ethernet header compression header (ethernet header) header format indicates the F field (the F field indicates whether it contains a complete Ethernet header or a compressed Ethernet header);
  • the decompression side After receiving the context information sent by the compression side, the decompression side sends feedback signaling to the compression side; after receiving the feedback signaling, the compression side determines that the corresponding context information has been established on the decompression side, and can use the context information to execute the Ethernet frame Head compression.
  • FIG. 2 is a schematic diagram of a system architecture 200 of the technical solution of an embodiment of the present application.
  • the system architecture 200 includes a compression-side device 210 and a decompression-side device 220.
  • the compression-side device and the decompression-side device can store context information for a certain CID, and the compression-side device 210 can correspond to the CID according to
  • the context information compresses the Ethernet frame header and sends the compressed Ethernet frame header to the decompression side device 220.
  • the decompression side device 220 can use the context information corresponding to the CID to decompress the compressed Ethernet frame header to obtain a complete Ethernet frame.
  • the compression side device 210 may also send a complete Ethernet frame and CID to the decompression side device after obtaining an Ethernet frame that conforms to an Ethernet frame format supported by the EHC function, and the decompression side device can use the CID to establish a connection with the The context information corresponding to the CID, and send feedback information to the compression side device to indicate that the context information corresponding to the CID has been established. After receiving the feedback information, the compression side device can compress the subsequent Ethernet frames sent using the context information .
  • the compression side device and the decompression side device of the above-mentioned Ethernet frame header compression solution may be a terminal and a network device, or a network device and a terminal, respectively, or may be two terminals communicating on a sidelink interface. , It can even be terminals and other core network devices, such as user plane functions (UPF) and so on.
  • UPF user plane functions
  • the compression side device indicates whether to carry a complete Ethernet header or a compressed Ethernet header through the F field in the EHC header, but it cannot indicate whether the decompression side needs to establish or update context information based on the CID carried in the EHC header. If the compression side device indicates through the F field that it carries a complete Ethernet frame header, but does not want the decompression side device to establish or update the context information corresponding to the CID, and the decompression side will still establish or update the CID after receiving the complete Ethernet frame Corresponding context information, this will cause the decompression side device to understand incorrectly, resulting in an error in the EHC function.
  • the Ethernet frame received by the compression device does not conform to the Ethernet frame format supported by the EHC function.
  • the compression device cannot perform the Ethernet header compression processing on this type of Ethernet frame. At this time, the compression device can only send the complete original Ethernet frame and does not establish it. Context information, and the decompression side does not want to establish or update context information.
  • the device on the compression side will only occasionally receive the corresponding Ethernet frames. At this time, the device on the compression side will establish and maintain some context information for these occasionally received Ethernet frames.
  • the context information is maintained for a long time, but it can only be used to compress/decompress a very small number of Ethernet frames. In this case, the compression side device can choose not to establish context information for these frames, and does not want the decompression side to establish or update the context information.
  • the compression side device can be allowed to directly transmit some Ethernet frames. For example, for some Ethernet frames that need to be transmitted as soon as possible, it is not necessary to perform compression or decompression, establish or update the context action, and avoid the Part of the Ethernet frame transmission brings additional delay.
  • FIG 3 shows a schematic diagram of a packet data convergence protocol data protocol data unit PDCP data PDU
  • Figure 3 shows the PDCP generated by the data radio bearer (DRB) that is configured with the EHC function agreed in the current standard The format of data PDU.
  • the PDCP header (PDCP header) immediately follows the SDAP header (SDAP header) and the Ethernet frame header compression header (EHC header).
  • the EHC header agrees to include: CID, F field (the F field indicates whether it contains a complete Ethernet header or a compressed Ethernet header).
  • the packet data convergence protocol sequence number (PDCP SN) in the PDCP header in Figure 3 can be 12 bits long.
  • PDCP SN can also be configured as 12 bits or 18 bits, and it can be configured as 18 bits PDCP.
  • the PDCP header can be as shown in Figure 4.
  • FIG. 5 shows a schematic flowchart of a method 500 for transmitting information provided by an embodiment of the present application.
  • the method 500 may be used in the system architecture shown in FIG. 2 above. As shown in FIG. 5, the method 500 includes:
  • the compression side device obtains an Ethernet frame.
  • the Ethernet frame in the embodiment of the present application may be a complete original Ethernet frame, or a compressed Ethernet frame after the original Ethernet frame has been compressed and compressed by the Ethernet frame header.
  • the Ethernet frame may include the Ethernet frame header and the Ethernet frame load ( payload), may not include the information added by the PDCP layer (such as the CID field and the F field), where the Ethernet frame header may be the original Ethernet frame header, or the original Ethernet frame header after compression processing.
  • the compression side device sends the Ethernet frame and first indication information to the decompression side device, and the decompression side device receives the Ethernet frame and first indication information sent by the compression side device, where the first indication information is used to indicate whether to establish or update
  • the context information of the decompression side device or indicates whether the compression side device has established or updated the context information, or indicates whether the decompression side device needs to perform EHC processing on the Ethernet frame.
  • the compression side device sending the Ethernet frame to the decompression side device includes: the compression side device sends a PDCP data PDU to the decompression side device, and the PDCP data PDU includes the Ethernet frame.
  • the first indication information may be carried in the PDCP data PDU and sent to the decompression side device together, or may also be sent to the decompression side device through other signaling other than the PDCP data PDU.
  • the compression side device sending the Ethernet frame and the first indication information to the decompression side device includes: the compression side device sends a PDCP data PDU to the decompression side device, and the PDCP data PDU includes the Ethernet frame and the first indication information.
  • the first indication information when carried in the PDCP data PDU and sent to the decompression side device, there may be the following indication modes.
  • An indication field E field can be introduced in the PDCP header, and the E field is used to indicate whether to include the CID field and the F field in the future.
  • Fig. 6 shows a schematic diagram of a PDCP header provided by an embodiment of the present application. Taking the length of PDCP SN of 12 bits as an example, the E field can be 1 bit in length. When the value of E is 1, it means that the data packet includes the CID field and the F field.
  • FIG. 7 shows another schematic diagram of a PDCP data PDU provided in an embodiment of the present application.
  • the device on the decompression side when the device on the decompression side receives the PDCP data PDU and finds that the E field has a value of 1, it can determine that the PDCP data PDU carries the CID field and the F field, and parse the data packet. For example, when the F field in the Ethernet frame header compression header indicates that the complete Ethernet frame header is included, the decompression side device may generate corresponding context information based on the value of the field to be compressed in the Ethernet frame header, and send feedback information to the compression side device; If the F field indicates that it contains a compressed Ethernet frame header, the decompression side device can reconstruct the original Ethernet frame based on the CID and the context information saved or maintained by the decompression side.
  • the decompression side device when the decompression side device receives the PDCP data PDU and finds that the E field has a value of 0, it can be determined that the PDCP data PDU does not carry the CID field and the F field.
  • the schematic diagram of the PDCP data PDU format can be as shown in Figure 8. Show. After the SDAP header, the original Ethernet frame is included, that is, the original complete frame header at the Ethernet frame header; when the decompression side device receives the PDCP data PDU and finds the value of the E field is 0, there is no need to establish or update the context maintained by the decompression side information.
  • the decompression side device if the decompression side device does not save or maintain the context information corresponding to the CID, the PDCP data PDU can be saved with the context information, that is, the context information corresponding to the CID is established; if the decompression side device saves The context information corresponding to the CID, but the context information carried in the received PDCP data PDU is inconsistent with the saved context information, the decompression side device can replace the previous context information with the newly received context information, that is, update the context information corresponding to the CID.
  • the E field is 1 bit, which occupies the first reserved bit (R bit) in the existing PDCP header.
  • R bit the first reserved bit
  • the specific length of the E field and the specific position in the PDCP header are not limited.
  • the E field is 1 bit, occupying the second or third R bits; or the E field may occupy 2 bits, such as the first and second R bits; or the first and third R bits; or the second and The third R bit; or, the E field can occupy 3 bits, etc.
  • the number of bits occupied by the F field and the CID field and the position in the PDCP data PDU are not specifically limited.
  • an E field can be introduced in the EHC header, and the E field is used to indicate whether to include the CID field and the F field.
  • a G field is introduced in the PDCP header, and the F field and CID field in the Ethernet frame header compression header always exist.
  • the compression side device may indicate whether the decompression side device needs to parse the F field and the CID field through the G field.
  • FIG. 9 shows another schematic diagram of PDCP data PDU provided by an embodiment of the present application. Taking the length of PDCP SN of 12 bits as an example, the G field may be 1 bit in length.
  • the decompression side device needs to parse the F field and the CID field. For example, when the F field in the Ethernet frame header compression header indicates that the complete Ethernet frame header is included, the decompression side device can generate it based on the CID and the value of the field to be compressed in the complete Ethernet frame header.
  • Corresponding context information and send feedback information to the compression side device; if the F field in the Ethernet frame header compression header indicates that the compressed Ethernet frame header is included, the decompression side can reconstruct it based on the context ID and the context information saved/maintained by the decompression side The original ether frame.
  • FIG. 10 shows a schematic diagram of an Ethernet frame header compression header provided in an embodiment of the present application.
  • Another implementation of the fourth method is to introduce a G field in the Ethernet frame header compression header, and the F field and CID always exist in the EHC header.
  • the decompression side device indicates whether the decompression side device needs to establish or update context information based on the CID and the information carried in the Ethernet frame header according to the G field.
  • the G field can be 1 bit in length. Exemplarily, a value of 1 indicates that context information needs to be established or updated; a value of 0 indicates that context information does not need to be established/updated.
  • FIG. 11 shows the Ethernet frame header compression header provided by this embodiment of the application. Another schematic diagram of.
  • the F field in the compression header of the Ethernet frame header not only indicates whether a complete Ethernet frame header or a compressed Ethernet frame header is subsequently carried, but also can indicate whether context information is carried or whether the decompression side needs to establish or update context information.
  • Fig. 12 shows another schematic diagram of an Ethernet frame header compression header provided by an embodiment of the present application, where the length of the F field may be 2 bits. Exemplarily, various meanings as shown in Table 1 below are expressed by specific values.
  • the decompression side device When the decompression side device receives the data packet, it can perform corresponding actions according to the value of the F field. For example, when the value of the F field is 10, it means that the data packet carries a compressed Ethernet frame. The decompression side device needs to follow the context ID and The context information saved/maintained by the decompression side device reconstructs the original Ethernet frame; if the value of the F field is 00, it means that the data packet carries the original Ethernet frame, and the decompression side device does not need to establish or update the context information according to the context ID; for example, F The value of the field is 01, indicating that the data packet carries the original Ethernet frame, and the decompression side device needs to establish or update the context information according to the context ID.
  • Table 1 indicates an implementation of the corresponding relationship between the value of the F field and the meaning.
  • the F field has a length of 2 bits, and the value is 11 It means a complete Ethernet frame and context information needs to be established/updated, 10 means a complete Ethernet frame and context information does not need to be established/updated, 01 means compressed Ethernet frame header, and 00 means reserved.
  • the CID field in the Ethernet frame header compression header indicates whether the decompression side device needs to establish or update context information.
  • the compression side device uses a reserved value of the CID, such as a value of all 0s or all 1s, indicating that the current PDCP data PDU of the decompression side device does not contain context information, and the PDCP data PDU carries the original complete Ethernet frame.
  • the decompression side device does not need to establish or update context information based on the context ID and the content of the Ethernet frame header.
  • the F field can indicate a complete Ethernet frame header or a compressed Ethernet frame header.
  • Another implementation manner of the sixth manner is that the F field indicates a compressed Ethernet frame header, but the CID field is a CID value that has not been used by the compression side device or a CID value that is not associated with a piece of context information.
  • the decompression side device reads that F indicates that it is a compressed Ethernet frame header, but cannot find the context information corresponding to the CID, it determines that the subsequent carry is a complete Ethernet frame, and does not need to perform the Ethernet header decompression operation or establish /Update context information operation.
  • the compression side device may instruct the decompression side device whether the Ethernet frame needs to be processed by EHC, or whether the Ethernet frame is processed or compressed using the EHC module/EHC protocol through the foregoing first indication information. If the first indication information indicates that the Ethernet frame does not need to be processed by EHC, or the Ethernet frame is not processed using the EHC module/EHC protocol, the decompression side device determines that the subsequent carrying is a complete Ethernet frame and does not need to perform the Ethernet header decompression operation. Or create/update context information operations.
  • the decompression side device establishes or updates the context information according to the CID and the value of the field to be compressed in the Ethernet frame header.
  • the method 500 further includes:
  • the decompression side device After establishing or updating the context information, the decompression side device sends feedback information to the compression side device, and the feedback information is used to indicate that the context information of the decompression side device has been established or updated.
  • the feedback information may indicate that the context information corresponding to the CID in the decompression side device has been established or updated.
  • the compression side device is used to indicate to the decompression side device whether the transmitted data packet carries context information, or whether the decompression side device needs to establish or update context information.
  • the compression side device can support multiple Ethernet frame formats. For transmission, for the uncompressed Ethernet frame format, the compression side device can directly pass the original Ethernet frame to the target side, and indicate that it does not carry context information or indicate that the context information is not established or updated, so as to prevent the decompression side device from understanding errors and causing EHC functions Something went wrong.
  • the compression side device does not establish context information for the Ethernet frame supported by EHC, it sends the context information to the decompression side device, and performs the compression operation after receiving the feedback information.
  • the decompression side device establishes or updates the context for a certain CID every time it receives an instruction After the information is fed back, it will bring the overhead of feedback signaling.
  • the embodiment of the application provides a method for transmitting information.
  • the feedback information is restricted to be sent only once within the timer duration, or a counter is introduced on the decompression side device to limit the reception of multiple data packets. Only a few feedback messages are sent, thereby reducing feedback signaling overhead and resource occupation.
  • FIG. 13 shows a schematic flowchart of a method 600 for transmitting information according to an embodiment of the present application.
  • the method 600 may be used in the system architecture shown in FIG. 2, and the method 600 includes:
  • the compression side device sends the first Ethernet frame and the first CID to the decompression side device, and the decompression side device receives the first Ethernet frame and the first CID sent by the compression side device.
  • the manner in which the compression-side device sends the first Ethernet frame and the first CID to the decompression-side device may refer to the description in the foregoing method 500, which is not repeated here for brevity.
  • the decompression side device establishes or updates context information corresponding to the first CID according to the first Ethernet frame.
  • the compression side device further sends first indication information to the decompression side device, and the decompression side device receives the first indication information sent by the compression side device, where the first indication information is used to instruct the decompression side device to establish or update the decompression side Context information of the device.
  • the decompression side device sends first feedback information to the compression side device and starts a first timer.
  • the first feedback information is used to indicate that the context information has been established or updated.
  • the decompression side device No feedback is given to the received second Ethernet frame, and the first CID is included in the compression header of the Ethernet frame header of the second Ethernet frame.
  • FIG. 14 shows a schematic diagram in which the decompression side device in an embodiment of the present application limits the number of times of feedback of feedback information through a timer.
  • the decompression side device maintains a timer for each CID or each piece of context information. Another approach is that the decompression side device only maintains one timer. As long as the decompression side device sends feedback signaling for a certain CID, the timer is started. When the timer is running, the decompression side device can no longer send any CID Feedback signaling.
  • Another implementation of this embodiment is to implement the above timer function by introducing a counter (count).
  • the network side can configure the maximum count value max_count of the counter.
  • FIG. 15 shows a schematic diagram in which the decompression side device limits the number of feedback times of feedback information through a timer in an embodiment of the present application.
  • the decompression side device maintains a counter for each CID or each piece of context information.
  • Another approach is to maintain only one counter on the decompression side device and limit the sending of N feedback signaling at most every time it receives max_count+1 PDCP data packets carrying context information.
  • a timer can be introduced in the compression side device to limit the context information carried in the data packet sent within a period of time. Quantity.
  • a new context information can be created, and it is the new context.
  • the information is associated with an already used CID (that is, the CID that has been associated with the context information before.
  • the compression side device has established many pieces of context information, and all available CIDs have been used up.
  • the compression side device can be replaced with new context information Remove a piece of context information that was previously created, that is, associate a used CID to the newly created piece of context information).
  • another way to operate the timer is to stop or reset the timer if the timer corresponding to the CID or the context information is running when the compression side device overwrites the previous context information with the new context information After sending the PDCP data packet carrying context information, the compression side device can start the timer corresponding to the CID or context information.
  • the compression side device When the compression side device receives the feedback signaling for a CID or context information sent by the decompression side, it can determine that the context information is available. If the timer corresponding to the CID or context information is running, it can stop/reset the timing Or the compression side equipment can also ignore the running status of the timer and not actively stop/reset the timer. When a new Ethernet frame data packet that matches the Ethernet frame header and the context information arrives, the compression side device can use the context information to compress the Ethernet frame header and send the compressed Ethernet frame.
  • the compression side device When the timer expires and the compression side device has not received the feedback signaling corresponding to the CID sent by the decompression side, the context information has not yet taken effect; at this time, the compression side device carries context information when sending PDCP data PDU 4 , And instruct the decompression side to establish or update context information and start/restart the corresponding timer.
  • the compression side device receives the feedback signaling corresponding to the CID from the decompression side, it determines that the context information corresponding to the CID is valid. If the timer corresponding to the CID is running, the compression side device can stop the timer. When the compression side device sends PDCP data PDU 5, it can use the context information to perform EHC compression.
  • a piece of context information is used as an example.
  • the context information carried in PDCP data PDU 4 is the same as PDCP data PDU 1.
  • the timer corresponding to the context information is not running or has timed out, you can send the unconfirmed context information again in PDCP data PDU 4 to prevent the decompression side device from not receiving the PDCP data PDU 1, or the decompression side device sending it
  • the feedback information has a packet loss.
  • One context information corresponds to the value of a specific field to be compressed, and any data packet whose value of the field to be compressed matches the context information can be considered as a data packet in the same data stream.
  • the Ethernet frames with different values of the fields to be compressed belong to different Ethernet data streams and correspond to different context information.
  • data packets of the same data stream are described as an example, that is, the context information corresponding to PDCP data PDU 1-5 in FIG. 17 is the same.
  • the sending of one data stream corresponds to the process described in one embodiment, and the sending of different data streams corresponds to different parallel processes.
  • the feedback signaling sent by the decompression side device may also carry other content, for example, including the specific context information corresponding to the CID, that is, the specific value of the field to be compressed.
  • the compression side device After the compression side device receives the feedback signaling, it judges that the context information included in the feedback signaling is consistent with the context information corresponding to the CID maintained by the compression side device, and then considers that the context information is successfully confirmed by the decompression side and can be used for EHC compression.
  • the compression side device maintains a timer for each CID or each piece of context information, and there may be a problem of maintaining too many timers.
  • Another approach is that the compression side device only maintains one timer. As long as the compression side device carries a piece of context information in the data packet and instructs the decompression side device to establish or update the context information, the timer is started. When the timer is running, The compression-side device may no longer send data packets that carry any context or instructions that instruct the decompression-side device to establish or update any context information.
  • Another implementation of this embodiment is to implement the above timer function by introducing a counter (count).
  • the network side can configure the maximum count value max_count of the counter.
  • FIG. 18 shows a schematic diagram of the compression side device restricting the number of feedback times of feedback information through a timer in an embodiment of the present application.
  • the compression side device maintains a counter for each CID or each piece of context information.
  • Another approach is to maintain only one counter on the compression side device, limiting each max_count packets to only N data packets carrying arbitrary context information.
  • the context information is restricted to be sent only once within the timer duration, so that the decompression side device triggers the sending of feedback signaling only once, or a counter is introduced on the compression side device to limit multiple Only a few packets in the data packet can send context information, so the decompression side device will not send feedback signaling for each received data packet, which can reduce the overhead of EHC feedback signaling and the occupation of air interface resources.
  • an apparatus for implementing any of the above methods.
  • an apparatus is provided that includes units (or means) for implementing each step performed by the decompression side device in any of the above methods.
  • another device is also provided, including a unit (or means) for implementing each step performed by the compression side device in any of the above methods.
  • FIG. 19 is a schematic diagram of a device for transmitting information according to an embodiment of the application.
  • the device is used for decompression side equipment.
  • the device 1900 includes a receiving unit 1910 and a context information processing unit 1920.
  • the receiving unit 1910 is used for the Ethernet frame and the first indication information from the compression side device, the first indication information is used for indicating whether to establish or update the context information on the decompression side;
  • the context information processing unit 1920 is used for the first indication information When instructing to establish or update the context information, establish or update the context information on the decompression side according to the Ethernet frame; or, when the first indication information indicates not to establish or update the context information, do not establish or update the context information of the decompression side device according to the Ethernet frame .
  • FIG. 20 is a schematic diagram of another apparatus for transmitting information provided by an embodiment of the application.
  • the device is used for decompression side equipment.
  • the device 2000 includes a receiving unit 2010, a context information processing unit 2020, a sending unit 2030, and a timer starting unit 2040.
  • the receiving unit 2010 is used to receive the first Ethernet frame and the first CID from the compression side device; the context information processing unit 2020 is used to establish or update the context information corresponding to the first CID according to the first Ethernet frame; the sending unit 2030 is used to send first feedback information to the compression side device and start a first timer, where the first feedback information is used to indicate that the context information has been established or updated; the timer starting unit 2040 is also used to start the first timer During the running period of the first timer, the sending unit 2030 no longer feedbacks the received second ether frame, and the ether frame header compression header of the second ether frame includes the first CID.
  • the receiving unit 2010 is further configured to receive the third Ethernet frame and the first CID from the compression side device; the context information processing unit 2020 is also configured to update the context information corresponding to the first CID according to the third Ethernet frame;
  • the sending unit 2030 is further configured to send second feedback information to the compression side device, where the second feedback information is used to indicate that the context information corresponding to the first CID has been updated; the timer starting unit 2040 is also used to restart the second A timer.
  • FIG. 21 is a schematic diagram of another information transmission apparatus provided by an embodiment of the application.
  • the device is used for compressing side equipment.
  • the device 2100 includes an acquiring unit 2110 and a sending unit 2120.
  • the obtaining unit 2110 is used to obtain the Ethernet frame;
  • the sending unit 2120 is used to send the Ethernet frame and first indication information to the decompression side device, and the first indication information is used to indicate whether to establish or update the decompression side context information.
  • the device also includes a receiving unit 2130, configured to receive feedback information sent by the decompression side when the first indication information indicates to establish or update the context information of the decompression side.
  • FIG. 22 is a schematic diagram of another apparatus for transmitting information provided by an embodiment of the application.
  • the device is used for compressing side equipment.
  • the device 2200 includes an acquiring unit 2210, a sending unit 2220, and a timer starting unit 2230.
  • the obtaining unit 2210 is used to obtain the first Ethernet frame;
  • the sending unit 2220 is used to send the first Ethernet frame and the first context information identifier CID to the decompression side device;
  • the timer starting unit 2230 is also used to start the first timer;
  • the sending unit is further configured to send a second Ethernet frame and first indication information to the decompression side device during the running of the first timer.
  • the first indication information is used to instruct the decompression side device not to establish or update the context information.
  • the Ethernet header compression header of the frame includes the first CID.
  • the device 2200 also includes a context information processing unit 2240, which is used to update the context information corresponding to the first CID according to the third Ethernet frame; the sending unit 2220 is also used to send the third Ethernet frame and the first CID to the decompression side device ;
  • the timer starting unit 2240 is also used to restart the first timer.
  • the sending unit 2220 is also used to send a fourth Ethernet frame and a second CID to the decompression side device, where the second CID is different from the first CID; the timer starting unit 2240 is also used to start a second timer; The sending unit 2220 is further configured to send a fifth Ethernet frame and second indication information to the decompression side device during the running period of the second timer.
  • the second indication information is used to instruct the decompression side device not to establish or update the context information.
  • the Ethernet header compression header of the five-Ethernet frame includes the second CID.
  • each unit in the device can be all implemented in the form of software called by processing elements; they can also be all implemented in the form of hardware; part of the units can also be implemented in the form of software called by the processing elements, and some of the units can be implemented in the form of hardware.
  • each unit can be a separate processing element, or it can be integrated in a certain chip of the device for implementation.
  • it can also be stored in the memory in the form of a program, which is called and executed by a certain processing element of the device.
  • each step of the above method or each of the above units may be implemented by an integrated logic circuit of hardware in a processor element or implemented in a form of being called by software through a processing element.
  • the unit in any of the above devices may be one or more integrated circuits configured to implement the above methods, for example: one or more application specific integrated circuits (ASICs), or, one or Multiple microprocessors (digital singnal processors, DSPs), or, one or more field programmable gate arrays (Field Programmable Gate Arrays, FPGAs), or a combination of at least two of these integrated circuits.
  • ASICs application specific integrated circuits
  • DSPs digital singnal processors
  • FPGAs Field Programmable Gate Arrays
  • the unit in the device can be implemented in the form of a processing element scheduler
  • the processing element can be a general-purpose processor, such as a central processing unit (CPU) or other processors that can call programs.
  • CPU central processing unit
  • these units can be integrated together and implemented in the form of a system-on-a-chip (SOC).
  • the above receiving unit (for example, a receiving unit or a communication unit) is an interface circuit of the device for receiving signals from other devices.
  • the receiving unit is an interface circuit used by the chip to receive signals from other chips or devices.
  • the above sending unit (for example, sending unit or communication unit) is an interface circuit of the device for sending signals to other devices.
  • the sending unit is an interface circuit used by the chip to send signals to other chips or devices.
  • FIG. 23 is a schematic structural diagram of an access network device according to an embodiment of the application.
  • the access network device is used to implement the operations of the compression side device or the decompression side device in the above embodiments.
  • the access network equipment includes: an antenna 2310, a radio frequency device 2320, and a baseband device 2330.
  • the antenna 2310 is connected to the radio frequency device 2320.
  • the radio frequency device 2320 receives the information sent by the terminal device through the antenna 2310, and sends the information sent by the terminal device to the baseband device 2330 for processing.
  • the baseband device 2330 processes the information of the terminal device and sends it to the radio frequency device 2320.
  • the radio frequency device 2320 processes the information of the terminal device and sends it to the terminal device via the antenna 2310.
  • the baseband device 2330 may include one or more processing elements 2331, for example, a main control CPU and other integrated circuits.
  • the baseband device 2330 may also include a storage element 2332 and an interface 23933.
  • the storage element 2332 is used to store programs and data; the interface 2333 is used to exchange information with the radio frequency device 2320.
  • the interface is, for example, a common public radio interface. , CPRI).
  • the above device for access network equipment may be located in the baseband device 2330.
  • the above device for access network equipment may be a chip on the baseband device 2330.
  • the chip includes at least one processing element and an interface circuit. In performing each step of any method performed by the above access network equipment, the interface circuit is used to communicate with other devices.
  • the unit for the access network device to implement each step in the above method can be implemented in the form of a processing element scheduler.
  • the device for the access network device includes a processing element and a storage element, and the processing element calls the storage element to store To execute the method executed by the access network device in the above method embodiment.
  • the storage element may be a storage element with the processing element on the same chip, that is, an on-chip storage element, or a storage element on a different chip from the processing element, that is, an off-chip storage element.
  • the unit for the access network device to implement each step in the above method may be configured as one or more processing elements, and these processing elements are provided on the baseband device.
  • the processing elements here may be integrated circuits, such as : One or more ASICs, or, one or more DSPs, or, one or more FPGAs, or a combination of these types of integrated circuits. These integrated circuits can be integrated together to form a chip.
  • the units for the access network equipment to implement each step in the above method can be integrated together and implemented in the form of a system-on-a-chip (SOC).
  • the baseband device includes the SOC chip for implementing the above method.
  • At least one processing element and storage element can be integrated in the chip, and the processing element can call the stored program of the storage element to implement the method executed by the above access network device; or, at least one integrated circuit can be integrated in the chip to implement The method executed by the above access network device; or, it can be combined with the above implementation.
  • the functions of some units are implemented in the form of calling programs by processing elements, and the functions of some units are implemented in the form of integrated circuits.
  • the above apparatus for access network equipment may include at least one processing element and an interface circuit, wherein at least one processing element is used to execute any method executed by the access network equipment provided in the above method embodiments.
  • the processing element can execute part or all of the steps executed by the access network device in the first way: calling the program stored in the storage element; or in the second way: through the integrated logic circuit of the hardware in the processor element Part or all of the steps executed by the access network device are executed in a manner of combining instructions; of course, part or all of the steps executed by the above access network device can also be executed in combination with the first method and the second manner.
  • the processing element here is the same as the above description, and it may be a general-purpose processor, such as a CPU, or one or more integrated circuits configured to implement the above method, such as: one or more ASICs, or, one or more micro-processing DSP, or, one or more FPGAs, etc., or a combination of at least two of these integrated circuit forms.
  • the storage element can be a memory or a collective term for multiple storage elements.
  • FIG. 24 is a schematic structural diagram of a terminal device according to an embodiment of the application.
  • the terminal device is used to implement the operations of the compression side device or the decompression side device in the above embodiments.
  • the terminal device includes: an antenna 2410, a radio frequency part 2420, and a signal processing part 2430.
  • the antenna 2410 is connected to the radio frequency part 2420.
  • the radio frequency part 2420 receives the information sent by the access network device through the antenna 2410, and sends the information sent by the access network device to the signal processing part 2430 for processing.
  • the signal processing part 2430 processes the information of the terminal device and sends it to the radio frequency part 2420.
  • the radio frequency part 2420 processes the information of the terminal device and sends it to the access network equipment via the antenna 2410.
  • the signal processing part 2430 is used to realize the processing of each communication protocol layer of the data.
  • the signal processing part 2430 may be a subsystem of the terminal device, and the terminal device may also include other subsystems, such as a central processing subsystem, which is used to process the operating system and application layer of the terminal device; another example is the peripheral sub-system.
  • the system is used to realize the connection with other equipment.
  • the signal processing part 2430 may be a separately provided chip.
  • the above devices may be located in the signal processing part 2430.
  • the signal processing part 2430 may include one or more processing elements 2431, for example, including a main control CPU and other integrated circuits.
  • the signal processing part 2430 may further include a storage element 2432 and an interface circuit 2433.
  • the storage element 2432 is used to store data and programs.
  • the program used to execute the method performed by the terminal device in the above method may or may not be stored in the storage element 2432, for example, stored in a memory other than the signal processing part 2430 During use, the signal processing part 2430 loads the program into the cache for use.
  • the interface circuit 2433 is used to communicate with the device.
  • the above device may be located in the signal processing part 2430, and the signal processing part 2430 may be realized by a chip.
  • the chip includes at least one processing element and an interface circuit.
  • the unit that implements each step in the above method can be implemented in the form of a processing element scheduler.
  • the device includes a processing element and a storage element, and the processing element calls a program stored by the storage element to execute the above method The method executed by the terminal device.
  • the storage element may be a storage element whose processing element is on the same chip, that is, an on-chip storage element.
  • the program used to execute the method executed by the terminal device in the above method may be a storage element on a different chip from the processing element, that is, an off-chip storage element.
  • the processing element calls or loads a program from the off-chip storage element on the on-chip storage element to call and execute the method executed by the terminal device in the above method embodiment.
  • the unit of the terminal device that implements each step in the above method may be configured as one or more processing elements, and these processing elements are provided on the signal processing part 2430, where the processing elements may be integrated circuits, for example : One or more ASICs, or, one or more DSPs, or, one or more FPGAs, or a combination of these types of integrated circuits. These integrated circuits can be integrated together to form a chip.
  • the units that implement each step in the above method can be integrated together and implemented in the form of a system-on-a-chip (SOC), and the SOC chip is used to implement the above method.
  • SOC system-on-a-chip
  • the chip can integrate at least one processing element and a storage element, and the processing element can call the stored program of the storage element to implement the method executed by the above terminal device; or, the chip can integrate at least one integrated circuit for realizing the above terminal.
  • the functions of some units are implemented in the form of calling programs by processing elements, and the functions of some units are implemented in the form of integrated circuits.
  • the above apparatus may include at least one processing element and an interface circuit, wherein at least one processing element is used to execute any method executed by the compression side device or the decompression side device provided in the above method embodiments.
  • the processing element can execute part or all of the steps performed by the compression-side device or the decompression-side device in the first way: calling the program stored in the storage element; or in the second way: through the hardware in the processor element
  • the integrated logic circuit combines instructions to execute part or all of the steps performed by the compression side device or the decompression side device; of course, it can also be combined with the first and second methods to execute part or all of the steps executed by the compression side device or the decompression side device .
  • the processing element here is the same as the above description, and it may be a general-purpose processor, such as a CPU, or one or more integrated circuits configured to implement the above method, such as: one or more ASICs, or, one or more micro-processing DSP, or, one or more FPGAs, etc., or a combination of at least two of these integrated circuit forms.
  • the storage element can be a memory or a collective term for multiple storage elements.
  • FIG. 25 is a schematic structural diagram of a core network device provided by an embodiment of this application, which is used to implement the operations of the compression side device or the decompression side device in the above embodiment.
  • the core network device includes: a processor 2510, a memory 2520, and an interface 2530, and the processor 2510, a memory 2520, and the interface 2530 are signal-connected.
  • the method executed by the compression side device or the decompression side device in the above embodiment can be implemented by the processor 2510 calling a program stored in the memory 2520. That is, the compression side device or the decompression side device includes a memory and a processor, and the memory is used to store a program, which is called by the processor to execute the method executed by the compression side device or the decompression side device in the above method embodiments.
  • the processor here may be an integrated circuit with signal processing capability, such as a CPU.
  • the apparatus for the core network device may be implemented by one or more integrated circuits configured to implement the above method. For example: one or more ASICs, or, one or more microprocessors DSP, or, one or more FPGAs, etc., or a combination of at least two of these integrated circuit forms. Or, the above implementations can be combined.
  • the disclosed system, device, and method may be implemented in other ways.
  • the device embodiments described above are merely illustrative, for example, the division of the units is only a logical function division, and there may be other divisions in actual implementation, for example, multiple units or components may be combined or It can be integrated into another system, or some features can be ignored or not implemented.
  • the displayed or discussed mutual coupling or direct coupling or communication connection may be indirect coupling or communication connection through some interfaces, devices or units, and may be in electrical, mechanical or other forms.
  • the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the objectives of the solutions of the embodiments.
  • the functional units in the various embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units may be integrated into one unit.
  • the function is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer readable storage medium.
  • the technical solution of the present application essentially or the part that contributes to the existing technology or the part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including Several instructions are used to make a computer device (which may be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the method described in each embodiment of the present application.
  • the aforementioned storage media include: U disk, mobile hard disk, read-only memory (Read-Only Memory, ROM), random access memory (Random Access Memory, RAM), magnetic disks or optical disks and other media that can store program codes. .

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Abstract

本申请提供了一种传输信息的方法和装置，该方法包括：解压侧设备接收来自于压缩侧设备的以太帧和第一指示信息，该第一指示信息用于指示是否建立或更新解压侧的上下文信息；当该第一指示信息指示建立或更新上下文信息时，解压侧设备根据该以太帧建立或更新解压侧的上下文信息；或者，当该第一指示信息指示不建立或不更新上下文信息时，解压侧设备不根据该以太帧建立或更新该解压侧的上下文信息。本申请实施例有助于避免解压侧设备对压缩侧设备的理解出现错误。

Description

一种传输信息的方法和装置 技术领域
本申请涉及通信领域，并且更具体地，涉及一种传输信息的方法和装置。
背景技术
在工业控制场景下，如工业互联网(industrial internet of things，IIoT)场景中，大部分工业控制数据具有时延敏感的特性，工业控制节点需要在确定的时间点产生数据，并需要在特定的时间间隔下传输到对端节点上。为支持工业控制数据的传输，多数工业控制网络在部署时采用以太网技术。
以太网是一种局域网通信技术，电气和电子工程师协会(institute of electrical and electronics engineers，IEEE)组织的IEEE 802.3工作组制定了以太的技术标准，它规定了包括物理层的连线、电子信号和媒体接入控制(media access control，MAC)协议的内容。目前的工业控制场景使用有线的以太网传输数据，这里，可以将基于以太网通信技术传输的数据简称为以太网数据。随着无线通信技术的快速发展，为未来工厂对于传输的灵活性、移动性、多样性和可改造性提供了无限可能。因此，在工业控制场景中，也可以通过无线通信实现以太网数据的传输。例如，控制台通过无线网络向机器设备发送指令，机器设备基于接收到的指令执行相应动作以及上报自身的状态信息给服务器。通过无线网络传输工业控制数据，避免了部署有线网络存在的成本、安全、维护等诸多为题，可以支持工业控制节点的灵活部署和移动性。
目前以太帧头压缩(ethernet header compression，EHC)机制只支持一种以太帧格式的压缩，但实际上工业应用中存在多种以太帧格式，当上层递交的以太帧格式和EHC支持压缩的以太帧格式不符时，EHC无法对该以太帧执行压缩，同时也会造成解压侧设备错误理解压缩侧的意图。
发明内容
本申请提供一种传输信息的方法和装置，有助于避免解压侧设备错误理解压缩侧设备。
第一方面，提供了一种传输信息的方法，该方法包括：解压侧设备接收来自于压缩侧设备的以太帧和第一指示信息，该第一指示信息用于指示是否建立或更新解压侧的上下文信息；当该第一指示信息指示建立或更新上下文信息时，解压侧设备根据该以太帧建立或更新解压侧的上下文信息；或者，当该第一指示信息指示不建立或不更新上下文信息时，解压侧设备不根据该以太帧建立或更新该解压侧的上下文信息。
本申请实施例的传输信息的方法，过压缩侧设备向解压侧设备指示数据包中是否携带有上下文信息，或指示解压侧设备是否需要建立或者更新上下文信息，压缩侧可以支持多种格式以太帧的传输，对于无法压缩的以太帧格式，压缩侧设备可以直接将原始以太帧传 递给解压侧设备，并指示不携带上下文信息或者指示不建立或者不更新上下文信息，避免解压侧设备理解错误，导致EHC功能出错。
结合第一方面，在第一方面的某些实现方式中，该解压侧设备接收来自于压缩侧设备的以太帧和第一指示信息，包括：解压侧设备接收来自于该压缩侧设备的分组数据汇聚协议数据协议数据单元PDCP data PDU，该PDCP data PDU中包括该第一以太帧和该第一指示信息。
本申请实施例中，通过在PDCP data PDU中携带第一以太帧和第一指示信息，解压侧设备可以明确压缩侧设备的意图，避免解压侧设备理解错误，同时也有助于节省信令的开销。
结合第一方面，在第一方面的某些实现方式中，该PDCP data PDU包括以太帧头压缩头，该以太帧头压缩头中包括该第一指示信息，其中，该第一指示信息用于指示该以太帧头压缩头是否包括上下文信息标识CID和头格式指示F字段，且当该第一指示信息用于指示该CID和该F字段存在时，指示建立或更新上下文信息，当该第一指示信息用于指示该CID和该F字段不存在时，指示不建立或不更新上下文信息；或者，该以太帧头压缩头包括该CID和该F字段，该第一指示信息用于指示是否根据该CID和该F字段建立或更新解压侧的上下文信息；或者，该第一指示信息还用于指示该以太帧为完整的以太帧或压缩的以太帧；或者，该以太帧头压缩头包括该CID，该CID包括该第一指示信息。
本申请实施例中，该第一指示信息可以携带在PDCP data PDU中的以太帧头压缩头中，解压侧设备可以明确压缩侧设备的意图，避免解压侧设备理解错误，同时也有助于节省信令的开销。
结合第一方面，在第一方面的某些实现方式中，该F字段位于该第一指示信息之前，且该F字段指示该以太帧为完整的以太帧。
本申请实施例中，F字段位于该第一指示信息之前，解压侧设备可以先对F字段进行解析，当F字段指示以太帧为完整的以太帧时，再对第一指示信息进行解析；当F字段指示以太帧为压缩的以太帧时，可以跳过第一指示信息。
结合第一方面，在第一方面的某些实现方式中，该PDCP data PDU包括PDCP头，该PDCP头包括该第一指示信息，其中，该第一指示信息用于指示该PDCP data PDU中的以太帧头压缩头是否包括CID和F字段，且当该第一指示信息用于指示该CID和该F字段存在时，指示建立或更新上下文信息，当该第一指示信息用于指示该CID和该F字段不存在时，指示不建立或不更新上下文信息；或者，该以太帧头压缩头包括该CID和该F字段，该第一指示信息用于指示是否根据该CID和该F字段建立或更新解压侧的上下文信息。
本申请实施例中，该第一指示信息可以携带在PDCP data PDU中的PDCP头中，解压侧设备可以明确压缩侧设备的意图，避免解压侧设备理解错误，同时也有助于节省信令的开销。
结合第一方面，在第一方面的某些实现方式中，该方法还包括：当该第一指示信息指示不建立或不更新上下文信息时，不向该压缩侧设备进行反馈。
本申请实施例中，当解压侧接收到的第一指示信息指示不建立或者不更新上下文信息时，可以不向压缩侧设备进行反馈，有助于避免信令的开销。
第二方面，提供了一种传输信息的方法，该方法包括：解压侧设备接收来自于压缩侧设备的第一以太帧和第一CID；解压侧设备根据该第一以太帧，建立或者更新该第一CID对应的上下文信息；解压侧设备向该压缩侧设备发送第一反馈信息并启动第一定时器，该第一反馈信息用于指示该上下文信息已经建立或者更新完成；其中，在该第一定时器运行期间内，不再对接收到的第二以太帧进行反馈，该第二以太帧的以太帧头压缩头包括该第一CID。
本申请实施例中，通过在解压侧设备中引入定时器，限制在定时器时长内只发送一次或者几次反馈信令，或者在解压侧设备中引入计数器，限制收到多个数据包中只有发送少数几次反馈信令，从而有助于降低反馈信令开销和对资源的占用。
结合第二方面，在第二方面的某些实现方式中，该方法还包括：解压侧设备接收来自于该压缩侧设备的第三以太帧和该第一CID；解压侧设备根据该第三以太帧，更新该第一CID对应的上下文信息；解压侧设备向该压缩侧设备发送第二反馈信息并重启该第一定时器，该第二反馈信息用于指示该第一CID对应的上下文信息已经更新完成。
结合第二方面，在第二方面的某些实现方式中，该方法还包括：解压侧设备接收来自于该压缩侧设备的第四以太帧和第二CID，该第二CID与该第一CID不同；解压侧设备根据该第四以太帧，建立或更新该第二CID对应的上下文信息；解压侧设备向该压缩侧设备发送第三反馈信息并启动第二定时器，该第三反馈信息用于指示该第二CID对应的上下文信息已经建立或更新完成，其中，在该第二定时器运行期间内，不再对接收到的第五以太帧进行反馈，该第五以太帧的以太帧头压缩头包括该第二CID。
本申请实施例中，不同的CID或者上下文信息可以对应不同的定时器，这样对于同一CID，解压侧设备可以在向压缩侧设备发送反馈信息后启动定时器，从而有助于降低反馈信令开销和对资源的占用。
第三方面，提供了一种传输信息的方法，该方法包括：压缩侧设备获取以太帧；压缩侧设备向解压侧设备发送该以太帧和第一指示信息，该第一指示信息用于指示是否建立或更新解压侧的上下文信息。
本申请实施例的传输信息的方法，过压缩侧设备向解压侧设备指示数据包中是否携带有context信息，或指示解压侧设备是否需要建立或者更新上下文信息，压缩侧可以支持多种格式以太帧的传输，对于无法压缩的以太帧格式，压缩侧设备可以直接将原始以太帧传递给解压侧设备，并指示不携带上下文信息或者指示不建立或者不更新上下文信息，避免解压侧设备理解错误，导致EHC功能出错。
结合第三方面，在第三方面的某些实现方式中，该向解压侧设备发送以该以太帧和第一指示信息，包括：压缩侧设备向解压侧设备发送PDCP data PDU，该PDCP data PDU中包括该第一以太帧和该第一指示信息。
结合第三方面，在第三方面的某些实现方式中，该PDCP data PDU包括以太帧头压缩头，该以太帧头压缩头中包括该第一指示信息，其中，该第一指示信息用于指示该以太帧头压缩头是否包括CID和F字段，且当该第一指示信息用于指示该CID和该F字段存在时，指示建立或更新上下文信息，当该第一指示信息用于指示该CID和该F字段不存在时，指示不建立或不更新上下文信息；或者，该以太帧头压缩头包括该CID和该F字段，该第一指示信息用于指示是否根据该CID和该F字段建立或更新解压侧的上下文信息； 或者，该第一指示信息还用于指示该以太帧为完整的以太帧或压缩的以太帧；或者，该以太帧头压缩头包括该CID，该CID包括该第一指示信息。
结合第三方面，在第三方面的某些实现方式中，该F字段位于该第一指示信息之前，且该F字段指示该以太帧为完整的以太帧。
结合第三方面，在第三方面的某些实现方式中，该PDCP data PDU包括PDCP头，该PDCP头包括该第一指示信息，其中，该第一指示信息用于指示该PDCP data PDU中的以太帧头压缩头是否包括CID和F字段，且当该第一指示信息用于指示该CID和该F字段存在时，指示建立或更新上下文信息，当该第一指示信息用于指示该CID和该F字段不存在时，指示不建立或不更新上下文信息；或者，该以太帧头压缩头包括该CID和该F字段，该第一指示信息用于指示是否根据该CID和该F字段建立或更新解压侧的上下文信息。
结合第三方面，在第三方面的某些实现方式中，该方法还包括：当该第一指示信息用于指示建立或更新解压侧的上下文信息时，压缩侧设备接收该解压侧设备发送的反馈信息，该反馈信息用于指示该解压侧设备的上下文信息建立或者更新完成。
第四方面，提供了一种传输信息的方法，该方法包括：
压缩侧设备向解压侧设备发送第一以太帧和第一上下文信息标识CID并启动第一定时器；在该第一定时器运行期间内，压缩侧设备向该解压侧设备发送第二以太帧和第一指示信息，该第一指示信息用于指示解压侧设备不建立或者不更新上下文信息，该第二以太帧的以太帧头压缩头包括该第一CID。
本申请实施例中，通过在压缩侧引入定时器，限制在定时器时长内只发送一次上下文信息，从而解压侧只触发发送一次或者几次反馈信令；或者在压缩侧引入计数器，限制多个数据包中只有少数几个包可以发送上下文信息，从而解压侧不会针对每个接收到的数据包发送反馈信令，可以降低EHC反馈信令的开销，和对空口资源的占用。
结合第四方面，在第四方面的某些实现方式中，该方法还包括：压缩侧设备根据第三以太帧，更新该第一CID对应的上下文信息；压缩侧设备向该解压侧设备发送第三以太帧和该第一CID并重新启动该第一定时器。
结合第四方面，在第四方面的某些实现方式中，该方法还包括：压缩侧设备向该解压侧设备发送第四以太帧和第二CID并启动第二定时器，该第二CID与该第一CID不同；在该第二定时器运行期间内，压缩侧设备向该解压侧设备发送第五以太帧和第二指示信息，该第二指示信息用于指示解压侧设备不建立或者不更新上下文信息，该第五以太帧的以太帧头压缩头包括该第二CID。
第五方面，本申请提供一种传输信息的装置，包括用于执行以上第一方面或者第二方面各个步骤的单元或者手段(means)。
第六方面，本申请提供一种传输信息的装置，包括用于执行以上第三方面或者第四方面各个步骤的单元或者手段(means)。
第七方面，本申请提供一种信息传输的装置，包括至少一个处理器，用于与存储器连接，以调用存储器中的程序执行以上第一方面或者第二方面提供的方法。该存储器可以位于该装置之内，也可以位于该装置之外。且该处理器包括一个或者多个。
第八方面，本申请提供一种随机接入装置，包括至少一个处理器，用于与存储器连接， 以调用存储器中的程序执行以上第三方面或者第四方面提供的方法。该存储器可以位于该装置之内，也可以位于该装置之外。且该处理器包括一个或者多个。
第九方面，本申请提供一种随机接入装置，包括至少一个处理器和接口电路，所述至少一个处理器用于执行以上第一方面或者第二方面提供的方法。
第十方面，本申请提供一种随机接入装置，包括至少一个处理器和接口电路，所述至少一个处理器用于执行以上第三方面或者第四方面提供的方法。
第十一方面，提供了一种终端，该终端包括上述第五方面至第十方面任一方面中提供的装置。
第十二方面，提供了一种网络设备，该网络设备包括上述第五方面至第十方面任一方面中提供的装置。
第十三方面，本申请提供一种程序，该程序在被处理器执行时，用于执行以上第一方面或者第二方面提供的方法。
第十四方面，本申请提供一种程序，该程序在被处理器执行时，用于执行以上第三方面或者第四方面提供的方法。
第十五方面，本申请提供一种程序产品，例如计算机可读存储介质，包括以上程序。
附图说明
图1是本申请实施例提供的一种以太帧格式的示意图。
图2是本申请实施例的技术方案的一种系统架构的示意图。
图3是本申请实施例的一种分组数据汇聚协议数据协议数据单元PDCP data PDU的示意图。
图4是本申请实施例的PDCP头的示意图。
图5是本申请实施例提供的传输信息的方法的示意性流程图。
图6是本申请实施例提供的PDCP头的另一示意图。
图7是本申请实施例提供的PDCP data PDU的另一示意图。
图8是本申请实施例提供的PDCP data PDU的另一示意图。
图9是本申请实施例提供的PDCP data PDU的另一示意图。
图10是本申请实施例提供的以太帧头压缩头的示意图。
图11是本申请实施例提供的以太帧头压缩头的另一示意图。
图12是本申请实施例提供的以太帧头压缩头的另一示意图。
图13是本申请实施例提供的传输信息的方法的另一示意性流程图。
图14是本申请实施例中解压侧设备通过定时器限制反馈信息的反馈次数的示意图。
图15是本申请实施例中解压侧设备通过计数器限制反馈信息的反馈次数的示意图。
图16是本申请实施例提供的传输信息的方法的另一示意性流程图。
图17是本申请实施例中压缩侧设备通过定时器限制反馈信息的反馈次数的示意图。
图18是本申请实施例中压缩压侧设备通过计数器限制反馈信息的反馈次数的示意图。
图19是本申请实施例提供的传输信息的装置的示意性框图。
图20是本申请实施例提供的传输信息的装置的另一示意性框图。
图21是本申请实施例提供的传输信息的装置的另一示意性框图。
图22是本申请实施例提供的传输信息的装置的另一示意性框图。
图23是本申请实施例提供的一种接入网设备的结构示意图。
图24是本申请实施例提供的一种终端装置的结构示意图。
图25是本申请实施例提供的一种核心网设备的结构示意图。
具体实施方式
以下，对本申请中的部分用语进行说明：
在本申请实施例中，终端又称之为终端装置或用户设备(user equipment，UE)，为具有无线通信功能的装置，且可以与slave连接，以下实施例中称为终端装置。该终端装置可以独立于slave，也可以与slave集成在一起；当独立布置时，该终端装置可以指具有无线通信功能的装置，其可以与slave连接，用于将slave与无线网络连接；当集成在一起时，该终端装置可以指集成有slave物理实体和无线通信功能的装置，例如芯片或片上系统。终端装置可以包括工业控制(industrial control)中的无线终端，也可以为其它控制系统中有类似需求的终端，例如无人驾驶(self driving)中的无线终端、远程手术(remote medical surgery)中的无线终端、智能电网(smart grid)中的无线终端、运输安全(transportation safety)中的无线终端、智慧城市(smart city)中的无线终端、或智慧家庭(smart home)中的无线终端等。
接入网设备是无线网络中的设备，例如将终端装置接入到无线网络的无线接入网(radio access network，RAN)节点。目前，一些RAN节点的举例为：gNB、传输接收点(transmission reception point，TRP)、演进型节点B(evolved Node B，eNB)、无线网络控制器(radio network controller，RNC)、节点B(Node B，NB)、基站控制器(base station controller，BSC)、基站收发台(base transceiver station,BTS)、家庭基站(例如，home evolved NodeB，或home Node B，HNB)、基带单元(base band unit，BBU)，或无线保真(wireless fidelity，Wifi)接入点(access point，AP)等。在一种网络结构中，接入网设备可以包括集中单元(centralized unit，CU)节点、或分布单元(distributed unit，DU)节点、或包括CU节点和DU节点的RAN设备。
在一种网络架构中，RAN包括基带装置和射频装置，其中基带装置可以由一个节点实现，也可以由多个节点实现，射频装置可以从基带装置拉远独立实现，也可以集成基带装置中，或者部分拉远部分集成在基带装置中。例如，RAN可以包括基带装置和射频装置，其中射频装置可以相对于基带装置拉远布置，例如射频拉远单元(remote radio unit，RRU)相对于BBU拉远布置。
RAN和终端之间的通信遵循一定的协议层结构。例如控制面协议层结构可以包括无线资源控制(radio resource control，RRC)层、分组数据汇聚层协议(packet data convergence protocol，PDCP)层、无线链路控制(radio link control，RLC)层、媒体接入控制(media access control，MAC)层和物理层等协议层的功能。用户面协议层结构可以包括PDCP层、RLC层、MAC层和物理层等协议层的功能；在一种实现中，PDCP层之上还可以包括业务数据适配(service data adaptation protocol,SDAP)层。这些协议层的功能可以由一个节点实现，或者可以由多个节点实现；例如，在一种演进结构中，RAN可以包括集中单元 (centralized unit，CU)和分布单元(distributed unit，DU)，多个DU可以由一个CU集中控制。CU和DU可以根据无线网络的协议层划分，例如PDCP层及以上协议层的功能设置在CU，PDCP以下的协议层，例如RLC层和MAC层等的功能设置在DU。这种协议层的划分仅仅是一种举例，还可以在其它协议层划分，例如在RLC层划分，将RLC层及以上协议层的功能设置在CU，RLC层以下协议层的功能设置在DU；或者，在某个协议层中划分，例如将RLC层的部分功能和RLC层以上的协议层的功能设置在CU，将RLC层的剩余功能和RLC层以下的协议层的功能设置在DU。此外，也可以按其它方式划分，例如按时延划分，将处理时间需要满足时延要求的功能设置在DU，不需要满足该时延要求的功能设置在CU。
可选的，射频装置可以拉远，不放在DU中，也可以集成在DU中，或者部分拉远部分集成在DU中，在此不作任何限制。
可选的，还可以将CU的控制面(CP)和用户面(UP)分离，分成不同实体来实现，分别为控制面CU实体(CU-CP实体)和用户面CU实体(CU-UP实体)。
在以上网络架构中，CU产生的信令可以通过DU发送给终端，或者终端产生的信令可以通过DU发送给CU。DU可以不对该信令进行解析而直接通过协议层封装而透传给终端或CU。以下实施例中如果涉及这种信令在DU和终端之间的传输，此时，DU对信令的发送或接收包括这种场景。例如，RRC或PDCP层的信令最终会处理为PHY层的信令发送给终端，或者，由接收到的PHY层的信令转变而来。在这种架构下，该RRC或PDCP层的信令，即也可以认为是由DU发送的，或者，由DU和射频发送的。
当采用以上CU-DU的结构时，接入网设备可以为CU节点、或DU节点、或包括CU节点和DU节点的RAN设备。
本申请以下实施例中的装置，根据其实现的功能，可以位于不同的设备。
在5G标准讨论中，正考虑利用5G系统支持垂直行业的业务数据传输，例如将5G系统作为工业控制网络的最后一跳，实现无线替代最后一跳有线。在此部署场景下，控制台产生的以太网数据需要通过5G系统传输至控制节点，相应的控制节点产生的以太数据也需要通过5G系统的传输才能到达控制台。实际应用的以太协议种类众多，图1示出了一种以太帧格式的示意图。如下图1所示，是一个IEEE 802.3以太帧的格式示意图，其中包括：7个字节的前导码(preamble)，1个字节的帧开始定界符(start of frame delimiter，SFD)，6字节的目的MAC地址，6字节的源MAC地址，2字节的长度/类型(如802.1QTagType)字段，2字节的标记控制信息(标记控制信息(tagging control information，TAG))，2字节的MAC客户端长度/类型，可变长度的负载或载荷，以及4字节的帧校验序列(frame check sequence，FCS)，其中负载可以包括数据(例如MAC客户端数据)，可选的负载还可以包括填充(padding)字段。在实际工业以太网环境中，一个控制台控制数个终端设备，控制台和终端设备的以太地址是固定不变的，对于一个终端设备而言，它接收到来自控制台的数据流中，目的地址字段填的都是自身的MAC地址，而源地址字段填的都是控制台的MAC地址，此外对于802.1QTagType字段和TAG控制信息通常也都是固定的；相应的，对于终端设备发送到控制台的数据流中，上述各个字段也通常是固定的。为了提升无线资源利用效率，可以考虑对以太数据流中以太帧头较为固定的字段进行压缩，降低以太帧大小，从而降低对无线资源的占用。
在目前的5G标准讨论过程中，已经同意引入以太帧头压缩(ethernet header compression，EHC)机制，并且同意完全在3GPP标准中定义EHC机制。EHC机制考虑对以太帧头中，相对固定的字段进行压缩，从而降低在空口传输的数据包的大小，以及资源开销。
目前，针对EHC，同意了以下的一些内容：
EHC功能在PDCP层执行；
以太帧头中的preamble，SFD，FCS字段可以不进行压缩，可以对目的地址，源地址，TAG相关字段，MAC客户端长度/类型字段进行压缩；NR R16标准同意只支持对一种以太帧格式进行压缩；
EHC采用context的概念，压缩侧和解压侧将一个上下文标识(context identity，CID)和具体的以太帧头待压缩字段的取值相关联，对于一个流，压缩侧至少需要传递携带完整的以太头和context ID至解压侧，以便在解压侧建立针对该CID的context信息；
以太帧在PDCP层生成EHC header，在EHC header中包括：CID，以太帧头压缩头(ethernet header)头格式指示F字段(F字段指示包含完整的以太帧头还是压缩的以太帧头)；
解压侧收到压缩侧发送的上下文(context)信息后，向压缩侧发送反馈信令；压缩侧收到反馈信令后，确定对应context信息在解压侧已建立，可以利用该context信息执行以太帧头压缩。
图2是本申请实施例的技术方案的一种系统架构200的示意图。如图2所示，该系统架构200中包括压缩侧设备210和解压侧设备220，其中压缩侧设备和解压侧设备可以保存针对某个CID的context信息，压缩侧设备210可以根据将该CID对应context信息对以太帧头进行压缩，并将压缩后的以太帧头发送给解压侧设备220，解压侧设备220可以利用该CID对应context信息对该压缩的太帧头进行解压从而得到完整的以太帧头；或者，压缩侧设备210也可以在获取到符合一种EHC功能支持的以太帧格式的以太帧后，向解压侧设备发送完整的以太帧以及CID，解压侧设备可以利用该CID建立与该CID对应的context信息，并向压缩侧设备发送反馈信息指示与该CID对应的context信息已经建立完成，压缩侧设备在收到反馈信息后就可以对利用该context信息对后续发送的以太帧进行压缩。
应理解，上述以太帧头压缩的方案的压缩侧设备和解压侧设备可以分别是终端和网络设备，或网络设备和终端，也可以是侧行链路(sidelink)接口上进行通信的两个终端，甚至可以是终端和其他核心网设备，如用户面功能(user plane function，UPF)等。
目前压缩侧设备通过EHC header中的F字段指示携带完整的以太帧头还是压缩以太帧头，但是无法指示解压侧是否需要根据EHC header中携带的CID建立或者更新context信息。如果压缩侧设备通过F字段指示携带的是完整的以太帧头，但是不希望解压侧设备建立或者更新该CID对应的context信息，而解压侧在接收到完整的以太帧后还是会建立或者更新CID对应的context信息，这样会造成解压侧设备理解错误，从而导致EHC功能出错。
下面介绍几种压缩侧不希望解压侧设备建立或者更新CID对应的context信息的场景：
场景一
压缩侧设备收到的以太帧不符合EHC功能支持的以太帧格式，压缩侧设备无法对该类以太帧进行以太头压缩处理，此时压缩侧设备只能发送完整的原始以太帧，并且不建立context信息，同时不希望解压侧建立或更新context信息。
场景二
对于部分待压缩字段的取值，压缩侧设备只会偶尔收到对应的以太帧，此时压缩侧设备为该些偶尔接收到的以太帧建立和维护一些context信息的必要性不强(在较长时间维护context信息，但只能用来对极少数以太帧进行压缩/解压)，此情形下，压缩侧设备可以选择不对这些帧建立context信息，同时不希望解压侧建立或更新context信息。
场景三
为了给压缩侧设备实现足够的一定灵活性，可以允许压缩侧设备对部分以太帧直接传输，如对于一些需要尽快传输的以太帧，可以不进行压缩或解压，建立或者更新上下文动作，避免对该部分以太帧传输带来额外的时延。
图3示出了一种分组数据汇聚协议数据协议数据单元PDCP data PDU的示意图，图3示出了目前标准中同意的配置了EHC功能的数据无线承载(data radio bearer，DRB)所生成的PDCP data PDU的格式。如图3所示，PDCP头(PDCP header)之后紧跟SDAP头(SDAP header)以及以太帧头压缩头(EHC header)。EHC header中同意了包括：CID，F字段(F字段指示包含完整的以太头还是压缩的以太头)。图3中PDCP header中分组数据汇聚协议层序列号(packet data convergence protocol sequence number，PDCP SN)的长度可以为12比特，实际上PDCP SN也可以配置为12比特或者18比特，配置为18比特PDCP SN时，PDCP头可以如图4所示。
图5示出了本申请实施例提供的传输信息的方法500的示意性流程图。该方法500可以用于上述图2所示的系统架构中，如图5所示，该方法500包括：
S510，压缩侧设备获取以太帧。
本申请实施例中，压缩侧设备可以由设备的应用层产生以太数据帧，并逐层处理递交到PDCP层；压缩侧设备也可以从相连接的其他设备(如以太网设备)获取到以太帧。
应理解，本申请实施例中的以太帧可以是完整的原始以太帧，或者是原始以太帧经过以太帧头压缩压缩处理后的压缩以太帧，以太帧中可以包括以太帧头和以太帧负荷(payload)，可以不包括PDCP层增加的信息(例如CID字段和F字段)，其中以太帧头可以是原始的以太帧头，或者是原始以太帧头经过压缩处理后的帧头。
S520，压缩侧设备向解压侧设备发送该以太帧和第一指示信息，该解压侧设备接收该压缩侧设备发送的以太帧和第一指示信息，该第一指示信息用于指示是否建立或者更新解压侧设备的上下文信息，或指示压缩侧设备是否建立或者更新了上下文信息，或者指示解压侧设备该以太帧是否需要进行EHC处理。
可选地，压缩侧设备向解压侧设备发送该以太帧，包括：压缩侧设备向解压侧设备发送PDCP data PDU，PDCP data PDU中包括该以太帧。
本申请实施例中，第一指示信息可以携带在PDCP data PDU中一起发送给解压侧设备，或者，也可以是通过PDCP data PDU之外的其他信令发送给解压侧设备。
可选地，压缩侧设备向解压侧设备发送该以太帧和第一指示信息，包括：压缩侧设备向解压侧设备发送PDCP data PDU，PDCP data PDU中包括该以太帧和该第一指示信息。
示例性的，当该第一指示信息携带在PDCP data PDU中发送给解压侧设备时，可以有以下几种指示的方式。
方式一
在PDCP头中可以引入一个指示字段E字段，通过E字段指示后续是否包括CID字段和F字段。图6示出了本申请实施例提供的一种PDCP头的示意图。以PDCP SN的长度为12比特为例，E字段可以为1比特长度。E取值为1时表示该数据包中包括CID字段和F字段，图7示出了本申请实施例提供的PDCP data PDU的另一示意图。
示例性的，解压侧设备接收到PDCP data PDU时发现E字段取值为1时，则可以确定PDCP data PDU携带有CID字段和F字段，并对数据包进行解析。例如，当以太帧头压缩头中F字段指示包含完整的以太帧头时，解压侧设备可以基于以太帧头中待压缩字段的取值生成相应的context信息，并向压缩侧设备发送反馈信息；如果F字段指示包含压缩的以太帧头时，解压侧设备可以基于CID和解压侧保存或者维护的context信息重建出原始以太帧。
示例性的，解压侧设备接收到PDCP data PDU时发现E字段取值为0时，则可以确定PDCP data PDU不携带有CID字段和F字段，其中，PDCP data PDU的格式示意图可以如图8所示。在SDAP头以后包括的是原始的以太帧，即以太帧头时原始完整的帧头；解压侧设备收到PDCP data PDU后发现E字段取值为0时，无需建立或者更新解压侧维护的context信息。
应理解，本申请实施例中，如果解压侧设备没有保存或者维护CID对应的context信息，则可以将PDCP data PDU携带context信息保存下来，即建立与CID对应的context信息；如果解压侧设备保存了CID对应的context信息，但是收到的PDCP data PDU中携带的context信息和保存的不一致，则解压侧设备可以用新收到的context信息取代之前的context信息，即更新与CID对应的context信息。
在图6至图8中，E字段为1比特，占用现有PDCP头中的第一个预留比特(R比特)。本申请实施例中对E字段的具体长度，以及在PDCP头中的具体位置并不限定。例如E字段为1比特，占用第二或者第三个R比特；或者E字段可以占用2比特，如占用第一和第二个R比特；或者第一和第三个R比特；或者第二和第三个R比特；或者，E字段可以占用3比特等。此外，F字段和CID字段占用的比特数，以及在PDCP data PDU中的位置也不做具体限定。
方式二
类似于方式一，可以在EHC头中引入一个E字段，通过E字段指示后续是否包括CID字段和F字段。
方式三
在PDCP头中引入一个G字段，且以太帧头压缩头中F字段和CID字段总存在。
压缩侧设备可以通过G字段指示解压侧设备是否需要解析F字段和CID字段。图9示出了本申请实施例提供的PDCP data PDU的另一示意图，以PDCP SN长度为12比特为例，G字段可以为1比特长度。
示例性的，G取值为0时指示解压侧设备不需要解析F字段和CID字段，后续携带的是完整以太帧头，且解压侧设备无需建立或者更新context信息；G取值为1时指示解 压侧设备需要解析F字段和CID字段，例如以太帧头压缩头中F字段指示包含完整的以太帧头时，则解压侧设备可以基于CID，以及完整以太帧头中待压缩字段的取值生成相应的context信息，并向压缩侧设备发送反馈信息；如果以太帧头压缩头中F字段指示包含压缩的以太帧头时，则解压侧可以基于context ID和解压侧保存/维护的context信息重建出原始以太帧。
在图9所示的PDCP data PDU中，G字段是1比特，占用现在PDCP头中的第一个预留比特位(R比特)，实际对G字段的具体长度，以及在PDCP头中的具体位置并不限定，例如G字段为1比特，可以占用第二或第三个R比特；或者G字段可以占用2比特，占用第一和第二个R比特；或者，占用第一和第三个R比特；或者，占用第二和第三个R比特；或者，G字段可以占用3比特等。此外，F字段和CID字段占用的比特数，以及在PDCP data PDU中的位置也不做限定。
方式四
类似于方式三，可以在以太帧头压缩头中引入一个G字段，且以太帧头压缩头中F字段和CID总存在。压缩侧设备通过G字段指示解压侧设备是否需要解析F字段和context ID字段，图10示出了本申请实施例提供的一种以太帧头压缩头的示意图。
方式四的另一种实现方式是，在以太帧头压缩头中引入一个G字段，且EHC header中F字段和CID总存在。当F字段指示携带完整以太帧头时，解压侧设备根据G字段指示解压侧设备是否需要基于CID和以太帧头携带的信息建立或者更新context信息，如G字段可以为1比特长度。示例性的，取值为1表示需要建立或者更新context信息；取值为0表示不需要建立/更新context信息。当F字段指示携带的是压缩以太帧时，解压侧设备忽略G字段取值，基于CID和所维护的context信息重建以太帧头，图11示出了本申请实施例提供的以太帧头压缩头的另一示意图。
方式五
以太帧头压缩头中的F字段不仅指示后续携带的是完整的以太帧头还是压缩以太帧头外，还可以指示是否携带context信息或指示解压侧是否需要建立或者更新context信息。图12示出了本申请实施例提供的以太帧头压缩头的另一示意图，其中F字段长度可以为2比特。示例性的，通过具体取值表示如下表1所示的各种含义。
表1
Figure PCTCN2019116419-appb-000001
当解压侧设备接收到数据包后，可以根据F字段的取值执行相应的动作，如F字段取值为10时，表示数据包携带的是压缩以太帧，解压侧设备需要根据context ID和和解压侧设备保存/维护的context信息重建出原始以太帧；如F字段取值为00，表示数据包携带的是原始以太帧，且不需要解压侧设备根据context ID建立或者更新context信息；如F 字段取值为01，表示数据包携带的是原始以太帧，且需要解压侧设备根据context ID建立或者更新context信息。表1指示F字段取值和表示含义对应关系的一种实现方式，实际应用时可以有不同实现方式，不做限定，例如另一种实现方式是F字段长度为2比特，其中取值为11表示完整以太帧且需要建立/更新context信息，10表示完整以太帧且不需要建立/更新context信息，01表示压缩以太帧头，00表示预留。
方式六
以太帧头压缩头中通过CID字段指示解压侧设备是否需要建立或者更新context信息。
示例性的，压缩侧设备通过CID的一个预留值，如全0或者全1的值指示解压侧设备当前PDCP data PDU没有包含context信息，此时PDCP data PDU中携带的是原始完整的以太帧，解压侧设备不需要基于context ID和以太帧头内容建立或更新context信息。相应的，F字段可以指示完整以太帧头，或压缩以太帧头。此时，解压侧设备读取到CID为预留值时，即可确定后续携带的是完整以太帧，无需进行以太头解压缩操作，或者建立或者更新context信息操作。
方式六的另一种实现方式是，F字段指示为压缩以太帧头，但CID字段是压缩侧设备还未使用的一个CID值或未关联到一条上下文信息的CID值。此时，解压侧设备读取到F指示是压缩以太帧头，但找不到与该CID对应的上下文信息时，则确定后续携带的是完整以太帧，无需进行以太头解压缩操作，或者建立/更新context信息操作。
在上述各方式中，压缩侧设备可以通过上述第一指示信息指示解压侧设备该以太帧是否需要进行EHC处理，或该以太帧是否使用了EHC模块/EHC协议进行了处理或压缩操作。如果第一指示信息指示该以太帧不需要进行EHC处理，或该以太帧没有使用EHC模块/EHC协议进行处理，则解压侧设备确定后续携带的是完整以太帧，无需进行以太头解压缩操作，或者建立/更新context信息操作。
S531，当第一指示信息指示建立或者更新上下文信息时，解压侧设备根据该以太帧建立或者更新解压侧的上下文信息。
可选地，解压侧设备根据CID和以太帧头中待压缩字段的取值，建立或者更新上下文信息。
S532，当第一指示信息指示不建立或者不更新上下文信息时，解压侧设备不根据该以太帧建立或者更新解压侧的上下文信息。
可选地，当第一指示信息指示建立或者更新上下文信息时，该方法500还包括：
解压侧设备在建立或者更新上下文信息后，向压缩侧设备发送反馈信息，该反馈信息用于指示解压侧设备的上下文信息已经建立或者更新完成。
具体地，该反馈信息可以指示解压侧设备中该CID对应的上下文信息已经建立或者更新完成。
本申请实施例中，通过压缩侧设备向解压侧设备指示所传输数据包中是否携带有context信息，或指示解压侧设备是否需要建立或者更新context信息，压缩侧设备可以支持多种以太帧格式的传输，对于无法压缩的以太帧格式，压缩侧设备可以直接将原始以太帧传递给目标侧，并指示不携带context信息或者指示不建立或者不更新context信息，避免解压侧设备理解错误，导致EHC功能出错。
压缩侧设备对于EHC支持的以太帧没有建立上下文信息，则向解压侧设备发送上下 文信息，在收到反馈信息后才进行压缩操作，解压侧设备每收到指示建立或者更新针对某一个CID的上下文信息后都进行反馈，会带来反馈信令的开销。
本申请实施例提供了一种传输信息的方法，通过在解压侧设备引入定时器，限制在定时器时长内只发送一次反馈信息，或者在解压侧设备引入计数器，限制收到多个数据包中只有发送少数几次反馈信息，从而降低反馈信令开销和对资源的占用。
图13示出了本申请实施例提供的传输信息的方法600的示意性流程图。该方法600可以用于上述图2所示的系统架构中，该方法600包括：
S610，压缩侧设备向解压侧设备发送第一以太帧和第一CID，解压侧设备接收压缩侧设备发送的该第一以太帧和该第一CID。
应理解，压缩侧设备向解压侧设备发送第一以太帧和第一CID的方式可以参考上述方法500中的描述，为了简洁，在此不再赘述。
S620，解压侧设备根据该第一以太帧，建立或者更新该第一CID对应的上下文信息。
可选地，压缩侧设备还向解压侧设备发送第一指示信息，解压侧设备接收该压缩侧设备发送的该第一指示信息，该第一指示信息用于指示解压侧设备建立或者更新解压侧设备的上下文信息。
S630，解压侧设备向压缩侧设备发送第一反馈信息并启动第一定时器，该第一反馈信息用于指示该上下文信息已经建立或者更新完成，在该第一定时器运行期间，解压侧设备不再对接收到的第二以太帧进行反馈，该第二以太帧的以太帧头压缩头中包括该第一CID。
示例性的，图14示出了本申请实施例中解压侧设备通过定时器限制反馈信息的反馈次数的示意图。
解压侧设备收到PDCP data PDU 1，其中携带context信息(如CID＝1)，并携带指示信息指示解压侧设备建立或者更新context信息，如果解压侧设备没有保存与该CID＝1对应的context信息，则解压侧设备保存CID＝1对应的context信息；解压侧设备发送针对CID＝1的反馈信息，并启动一个与CID＝1或该条context信息对应的第一定时器。
解压侧设备收到PDCP data PDU 2和PDCP data PDU 3，其中携带context信息(如CID＝1)，并指示解压侧设备建立或者更新context信息，解压侧设备保存有与该CID＝1对应的context信息。如果与该CID或该条context信息对应的第一定时器在运行，则解压侧设备不发送反馈信息。
解压侧设备收到PDCP data PDU 4，其中携带context信息(如CID＝1)，并指示解压侧设备建立或者/更新context信息，如果解压侧设备保存的与CID＝1对应的context信息和数据包指示的信息不同，则解压侧设备可以用PDCP data PDU 4中携带的context信息取代之前保存的CID＝1对应的context信息；解压侧设备发送针对CID＝1的反馈信令后，启动/重启与CID＝1或该条context信息对应的定时器。该情形下，对定时器进行操作的另一种方式是，当解压侧设备用新的context信息覆盖之前的context信息时，如果CID＝1或context信息对应的定时器在运行，则停止或重置定时器，解压侧设备发送了反馈信息后，可以启动该CID＝1或context信息对应的第一定时器。
或者，解压侧设备收到PDCP data PDU 4，其中携带context信息(如CID＝1)，并指示解压侧设备建立或者/更新context信息，如果解压侧设备保存的与CID＝1对应的context 信息和数据包指示的信息相同，但是在收到PDCP data PDU 4时定时器已经超时，那么解压侧设备可以向压缩侧设备发送反馈信息并重新启动第一定时器。
上述过程中，解压侧设备是针对每个CID或每条context信息维护一个定时器的。另一种做法是解压侧设备只维护一个定时器，只要解压侧设备发送了了针对某一个CID的反馈信令，则启动定时器，定时器运行时，解压侧设备不可以再发送针对任何CID的反馈信令。
本实施例的另一种实现方式是通过引入计数器(count)实现上述定时器的功能。网络侧可以配置计数器的最大计数值max_count。当解压侧设备收到压缩侧发送的PDCP data PDU中包括context信息，且解压侧设备没有保存对应的context信息，则解压侧设备保存该context信息(如CID＝1)，并为该CID设置count＝1。当count<N时，解压侧设备收到PDCP数据包中携带context信息，发送反馈信令；当count≥N时，解压侧设备收到PDCP data PDU中携带context信息时，不发送反馈信令。解压侧设备每收到一次PDCP data PDU，其中携带的context信息和自己保存的与CID＝1对应的context信息相同，则count值更新为原count值模max_count加1。
图15示出了本申请实施例中解压侧设备通过定时器限制反馈信息的反馈次数的示意图。
假设max_count＝2，N＝1。解压侧设备收到PDCP data PDU 1携带CID＝1的context信息，且没有保存该context信息，则置count＝1，并发送反馈信令；解压侧设备收到PDCP data PDU2和PDCP data PDU 3后，不发送反馈信息，同时count值分别更新为2和1；解压侧收到PDCP data PDU 4后，可以再次发送反馈信息。
上述过程中，解压侧设备是针对每个CID或每条context信息维护一个计数器的。另一种做法是解压侧设备只维护一个计数器，限制每接收max_count+1个携带context信息的PDCP数据包最多发送N个反馈信令。
应理解，上述方法600也可以与上述方法500进行结合。
本申请实施例中，通过在解压侧设备引入定时器，限制在定时器时长内只发送一次反馈信息；或者在解压侧设备引入计数器，限制收到多个数据包中只有发送少数几次反馈信息，从而降低反馈信息开销和对资源的占用。
为了避免压缩侧设备频繁发送带有context信息的数据包，导致解压侧设备发送较多的反馈信令，可以在压缩侧设备引入定时器，限制一段时间内所发送数据包中携带的context信息的数量。
图16示出了本申请实施例提供的传输信息的方法700的示意性流程图。该方法700可以用于上述图2所示的系统架构中，该方法700包括：
S710，向解压侧设备发送第一以太帧和第一CID并启动第一定时器。
S720，在第一定时器运行期间内，向解压侧设备发送第二以太帧和第一指示信息，该第一指示信息用于指示解压侧设备不建立或者不更新上下文信息，该第二以太帧的以太帧头压缩头包括该第一CID。
示例性的，压缩侧设备有新的以太帧数据包到达时，发现是EHC支持进行压缩的以太帧格式，但没有建立可用于压缩的context信息，则可以建立一条新的context信息，并为该条context分配一个新的CID，如CID＝1。压缩侧设备发送该以太帧所组PDCP数据 包时，可以在数据包中携带context信息，并可以采用上述方法500中的方式指示解压侧设备建立或者更新context信息，同时压缩侧设备可以启动一个与CID＝1或该条context信息对应的定时器。
压缩侧设备有新的以太帧数据包到达时，发现是EHC支持进行压缩的以太帧格式，且已经建立了可用于压缩的context信息，如对应的CID＝1，但该context还不能用于以太帧头压缩(例如还没有收到解压侧设备的针对CID＝1或者该context信息的反馈信息)。如果该context信息或CID＝1对应的定时器处于运行状态，则压缩侧设备发送给以太帧所组PDCP数据包时，并通过上述方法500的方式指示解压侧设备不建立或者不更新context信息；如果该context信息或CID＝1对应的定时器未处于运行状态，例如定时器已超时或停止，则压缩侧设备发送该以太帧所组PDCP数据包时，可以在数据包中携带context信息，并启动或者重启与CID＝1或该条context信息对应的定时器。
压缩侧设备有新的以太帧数据包到达时，发现是EHC支持进行压缩的以太帧格式，但没有建立可用于压缩的context信息，则可以建立一条新的context信息，并为该条新的context信息关联一个已经使用的CID(即之前已经关联了context信息的CID，比如压缩侧设备已经建立了很多条context信息，所有可用的CID已经用完，此时压缩侧设备可以用新的context信息取代掉之前建立的一条context信息，即将一个已使用的CID关联到该条新建立的context信息)。如果没有与该CID或该条context信息对应的定时器在运行，则压缩侧设备发送该以太帧所组PDCP数据包时，可以在数据包中携带context信息，并启动一个与该CID或该条context信息对应的定时器；如果有该CID或该条context信息对应的定时器在运行，则压缩侧设备发送该以太帧所组PDCP数据包时，可以在数据包中携带context信息，并启动/重启对应的定时器。该情形下，对定时器进行操作的另一种方式是，当压缩侧设备用新的context信息覆盖之前的context信息时，如果CID或context信息对应的定时器在运行，则停止或重置定时器，压缩侧设备发送携带context信息的PDCP数据包后，可以启动该CID或context信息对应的定时器。
压缩侧设备收到解压侧发送的针对一个CID或context信息的反馈信令时，可以确定该条context信息可用，如果该CID或context信息对应的定时器正在运行，则可以停止/重置该定时器；或者压缩侧设备也可以忽略该定时器的运行状态，不主动停止/重置定时器。当有以太帧头和该context信息匹配的新的以太帧数据包到达时，压缩侧设备可以利用context信息对以太帧头进行压缩，并发送压缩后的以太帧。
以下图17为例，对上述过程进行描述。压缩侧设备有新以太数据流到达，且没有建立相匹配的context信息，则建立一条新的context并分配CID；压缩侧设备发送PDCP data PDU 1时，携带context信息，并指示解压侧设备可以建立或者更新context信息，压缩侧设备启动一个与所分配CID对应的定时器；在定时器运行时发送的PDCP data PDU 2和PDCP data PDU 3，在数据包中不携带context信息，或者指示解压侧设备不建立或者不更新context信息。当定时器超时，压缩侧设备还没有收到解压侧发送的针对该CID对应的反馈信令，则该条context信息仍未生效；此时压缩侧设备在发送PDCP data PDU 4时，携带context信息，并指示解压侧可以建立或者更新context信息，启动/重启对应的定时器。当压缩侧设备收到解压侧针对该CID对应的反馈信令后，则确定该CID对应的context信息生效，如果该CID对应的定时器在运行，压缩侧设备可以停止该定时器。当压缩侧设备 发送PDCP data PDU 5时，可以利用该context信息进行EHC压缩。
上述实施例中，是以一条context信息举例的。这里PDCP data PDU 4携带的context信息和PDCP data PDU 1是一样的。发送PDCP data PDU 4的时候，因为该context信息还没有收到解压侧的feedback，所以还不能用来做压缩处理。同时该context信息对应的timer不在运行或已经超时了，则可以在PDCP data PDU 4中再次发送一下该未确认的context信息，目的是防止解压侧设备没收到PDCP data PDU 1，或者解压侧设备发送的反馈信息(feedback)发生了丢包。
一个context信息对应一个具体的待压缩字段的取值，凡是待压缩字段取值和该context信息匹配的数据包可以认为是同一个数据流中的数据包。待压缩字段取值不同的以太帧属于不同的以太数据流，会对应到不同的context信息。上述实施例中是对同一个数据流的数据包为例进行说明的，即图17中PDCP data PDU 1-5对应的context信息是一样的。一个数据流的发送会对应一个实施例描述的过程，不同数据流发送对应不同并行的过程。
解压侧设备发送的反馈信令中，除了CID外，还可以携带其他内容，例如包括该CID对应的具体context信息，即待压缩字段的具体取值等。压缩侧设备收到反馈信令后，判断反馈信令中包括的context信息和自身维护的该CID对应的context信息一致，才认为该context信息被解压侧成功确认，可用于EHC压缩。
上述过程中，压缩侧设备是针对每个CID或每条context信息维护一个定时器的，可能存在维护定时器过多的问题。另一种做法是压缩侧设备只维护一个定时器，只要压缩侧设备在数据包中携带了某一条context信息，并指示解压侧设备建立或者更新context信息，则启动定时器，定时器运行时，压缩侧设备不可以再发送携带任何context或携带指示解压侧设备建立或者更新任何context信息的指示信息的数据包。
本实施例的另一种实现方式是通过引入计数器(count)实现上述定时器的功能。网络侧可以配置计数器的最大计数值max_count。当新的以太数据流到达，且发现是EHC支持进行压缩的以太帧格式，但没有建立可用于压缩的context信息，则可以建立一条新的context信息，并为该条context分配一个新的CID，如CID＝1，并为该CID设置count＝0。当count<N时，压缩侧设备可以在PDCP数据包中携带context信息，当count≥N时，压缩侧设备在PDCP数据包中不携带context信息。压缩侧设备每发送一次PDCP数据包，其中包括的以太帧帧头和CID＝1对应的context信息相匹配，则count值累加1并模max_count。
图18示出了本申请实施例中压缩侧设备通过定时器限制反馈信息的反馈次数的示意图。
假设max_count＝2，N＝1。压缩侧设备收到新以太数据流，没有匹配context，则建立context信息，分配CID，设置count＝0；发送PDCP data PDU 1中携带context信息，且count值更新为1，此后发送的PDCP data PDU 2和PDCP data PDU 3不可以再携带该context信息，且count值分别更新为2和0；压缩侧设备发送PDCP data PDU 4时又可以携带context信息。
上述过程中，压缩侧设备是针对每个CID或每条context信息维护一个计数器的。另一种做法是压缩侧设备只维护一个计数器，限制每max_count个包中只有N个数据包携带任意context信息。
应理解，上述方法700可以和上述方法500进行结合。
本申请实施例中，通过在压缩侧设备引入定时器，限制在定时器时长内只发送一次context信息，从而解压侧设备只触发发送一次反馈信令，或者在压缩侧设备引入计数器，限制多个数据包中只有少数几个包可以发送context信息，从而解压侧设备不会针对每个接收到的数据包发送反馈信令，可以降低EHC反馈信令的开销，和对空口资源的占用。
本申请实施例还提供用于实现以上任一种方法的装置，例如，提供一种装置包括用以实现以上任一种方法中解压侧设备所执行的各个步骤的单元(或手段)。再如，还提供另一种装置，包括用以实现以上任一种方法中压缩侧设备所执行的各个步骤的单元(或手段)。
例如，请参考图19，其为本申请实施例提供的一种传输信息的装置的示意图。该装置用于解压侧设备，如图19所示，该装置1900包括接收单元1910和上下文信息处理单元1920。其中接收单元1910用于来自于压缩侧设备的以太帧和第一指示信息，该第一指示信息用于指示是否建立或更新解压侧的上下文信息；上下文信息处理单元1920用于当第一指示信息指示建立或更新上下文信息时，根据以太帧建立或更新解压侧的上下文信息；或者，当第一指示信息指示不建立或不更新上下文信息时，不根据以太帧建立或更新解压侧设备的上下文信息。
该装置1900还可以包括发送单元1930，发送单元1930用于当第一指示信息指示不建立或不更新上下文信息时，不向压缩侧设备进行反馈。
例如，请参考图20，其为本申请实施例提供的另一种传输信息的装置的示意图。该装置用于解压侧设备，如图20所示，该装置2000包括接收单元2010，上下文信息处理单元2020、发送单元2030和定时器启动单元2040。其中接收单元2010用于接收来自于压缩侧设备的第一以太帧和第一CID；上下文信息处理单元2020用于根据第一以太帧，建立或者更新所述第一CID对应的上下文信息；发送单元2030用于向压缩侧设备发送第一反馈信息并启动第一定时器，该第一反馈信息用于指示所述上下文信息已经建立或者更新完成；定时器启动单元2040还用于启动第一定时器，在第一定时器运行期间内，发送单元2030不再对接收到的第二以太帧进行反馈，第二以太帧的以太帧头压缩头包括述第一CID。
该接收单元2010还用于接收来自于压缩侧设备的第三以太帧和第一CID；上下文信息处理单元2020还用于根据所述第三以太帧，更新所述第一CID对应的上下文信息；发送单元2030还用于向所述压缩侧设备发送第二反馈信息，所述第二反馈信息用于指示第一CID对应的上下文信息已经更新完成；定时器启动单元2040还用于重新启动该第一定时器。
例如，请参考图21，其为本申请实施例提供的另一种传输信息的装置的示意图。该装置用于压缩侧设备，如图21所示，该装置2100包括获取单元2110和发送单元2120。其中获取单元2110用于获取以太帧；发送单元2120用于向解压侧设备发送以太帧和第一指示信息，第一指示信息用于指示是否建立或更新解压侧的上下文信息。
该装置还包括接收单元2130，用于在第一指示信息指示建立或者更新解压侧的上下文信息时，接收解压侧发送的反馈信息。
例如，请参考图22，其为本申请实施例提供的另一种传输信息的装置的示意图。该装置用于压缩侧设备，如图22所示，该装置2200包括获取单元2210、发送单元2220和 定时器启动单元2230。其中获取单元2210用于获取第一以太帧；发送单元2220用于向解压侧设备发送第一以太帧和第一上下文信息标识CID；该定时器启动单元2230还用于启动第一定时器；该发送单元还用于在该第一定时器运行期间，向解压侧设备发送第二以太帧和第一指示信息，第一指示信息用于指示解压侧设备不建立或者不更新上下文信息，第二以太帧的以太帧头压缩头包括第一CID。
该装置2200还包括上下文信息处理单元2240，用于根据第三以太帧，更新所述第一CID对应的上下文信息；该发送单元2220还用于向解压侧设备发送第三以太帧和第一CID；该定时器启动单元2240还用于重新启动该第一定时器。
该发送单元2220，还用于向解压侧设备发送第四以太帧和第二CID，所述第二CID与所述第一CID不同；该定时器启动单元2240还用于启动第二定时器；该发送单元2220还用于在第二定时器运行期间内，向解压侧设备发送第五以太帧和第二指示信息，第二指示信息用于指示解压侧设备不建立或者不更新上下文信息，第五以太帧的以太帧头压缩头包括第二CID。
应理解，以上装置中单元的划分仅仅是一种逻辑功能的划分，实际实现时可以全部或部分集成到一个物理实体上，也可以物理上分开。且装置中的单元可以全部以软件通过处理元件调用的形式实现；也可以全部以硬件的形式实现；还可以部分单元以软件通过处理元件调用的形式实现，部分单元以硬件的形式实现。例如，各个单元可以为单独设立的处理元件，也可以集成在装置的某一个芯片中实现，此外，也可以以程序的形式存储于存储器中，由装置的某一个处理元件调用并执行该单元的功能。此外这些单元全部或部分可以集成在一起，也可以独立实现。这里所述的处理元件又可以成为处理器，可以是一种具有信号的处理能力的集成电路。在实现过程中，上述方法的各步骤或以上各个单元可以通过处理器元件中的硬件的集成逻辑电路实现或者以软件通过处理元件调用的形式实现。
在一个例子中，以上任一装置中的单元可以是被配置成实施以上方法的一个或多个集成电路，例如：一个或多个特定集成电路(Application Specific Integrated Circuit，ASIC)，或，一个或多个微处理器(digital singnal processor，DSP)，或，一个或者多个现场可编程门阵列(Field Programmable Gate Array，FPGA)，或这些集成电路形式中至少两种的组合。再如，当装置中的单元可以通过处理元件调度程序的形式实现时，该处理元件可以是通用处理器，例如中央处理器(Central Processing Unit，CPU)或其它可以调用程序的处理器。再如，这些单元可以集成在一起，以片上系统(system-on-a-chip，SOC)的形式实现。
以上用于接收的单元(例如接收单元或通信单元)是一种该装置的接口电路，用于从其它装置接收信号。例如，当该装置以芯片的方式实现时，该接收单元是该芯片用于从其它芯片或装置接收信号的接口电路。以上用于发送的单元(例如发送单元或通信单元)是一种该装置的接口电路，用于向其它装置发送信号。例如，当该装置以芯片的方式实现时，该发送单元是该芯片用于向其它芯片或装置发送信号的接口电路。
请参考图23，其为本申请实施例提供的一种接入网设备的结构示意图。该接入网设备用于实现以上实施例中压缩侧设备或者解压侧设备的操作。如图23所示，该接入网设备包括：天线2310、射频装置2320、基带装置2330。天线2310与射频装置2320连接。在上行方向上，射频装置2320通过天线2310接收终端装置发送的信息，将终端装置发送 的信息发送给基带装置2330进行处理。在下行方向上，基带装置2330对终端装置的信息进行处理，并发送给射频装置2320，射频装置2320对终端装置的信息进行处理后经过天线2310发送给终端装置。
基带装置2330可以包括一个或多个处理元件2331，例如，包括一个主控CPU和其它集成电路。此外，该基带装置2330还可以包括存储元件2332和接口23933，存储元件2332用于存储程序和数据；接口2333用于与射频装置2320交互信息，该接口例如为通用公共无线接口(common public radio interface，CPRI)。以上用于接入网设备的装置可以位于基带装置2330，例如，以上用于接入网设备的装置可以为基带装置2330上的芯片，该芯片包括至少一个处理元件和接口电路，其中处理元件用于执行以上接入网设备执行的任一种方法的各个步骤，接口电路用于与其它装置通信。在一种实现中，接入网设备实现以上方法中各个步骤的单元可以通过处理元件调度程序的形式实现，例如用于接入网设备的装置包括处理元件和存储元件，处理元件调用存储元件存储的程序，以执行以上方法实施例中接入网设备执行的方法。存储元件可以为处理元件处于同一芯片上的存储元件，即片内存储元件，也可以为与处理元件处于不同芯片上的存储元件，即片外存储元件。
在另一种实现中，接入网设备实现以上方法中各个步骤的单元可以是被配置成一个或多个处理元件，这些处理元件设置于基带装置上，这里的处理元件可以为集成电路，例如：一个或多个ASIC，或，一个或多个DSP，或，一个或者多个FPGA，或者这些类集成电路的组合。这些集成电路可以集成在一起，构成芯片。
接入网设备实现以上方法中各个步骤的单元可以集成在一起，以片上系统(system-on-a-chip，SOC)的形式实现，例如，基带装置包括该SOC芯片，用于实现以上方法。该芯片内可以集成至少一个处理元件和存储元件，由处理元件调用存储元件的存储的程序的形式实现以上接入网设备执行的方法；或者，该芯片内可以集成至少一个集成电路，用于实现以上接入网设备执行的方法；或者，可以结合以上实现方式，部分单元的功能通过处理元件调用程序的形式实现，部分单元的功能通过集成电路的形式实现。
可见，以上用于接入网设备的装置可以包括至少一个处理元件和接口电路，其中至少一个处理元件用于执行以上方法实施例所提供的任一种接入网设备执行的方法。处理元件可以以第一种方式：即调用存储元件存储的程序的方式执行接入网设备执行的部分或全部步骤；也可以以第二种方式：即通过处理器元件中的硬件的集成逻辑电路结合指令的方式执行接入网设备执行的部分或全部步骤；当然，也可以结合第一种方式和第二种方式执行以上接入网设备执行的部分或全部步骤。
这里的处理元件同以上描述，可以是通用处理器，例如CPU，还可以是被配置成实施以上方法的一个或多个集成电路，例如：一个或多个ASIC，或，一个或多个微处理器DSP，或，一个或者多个FPGA等，或这些集成电路形式中至少两种的组合。存储元件可以是一个存储器，也可以是多个存储元件的统称。
请参考图24，其为本申请实施例提供的一种终端装置的结构示意图。该终端装置用于实现以上实施例中压缩侧设备或者解压侧设备的操作。如图24所示，该终端装置包括：天线2410、射频部分2420、信号处理部分2430。天线2410与射频部分2420连接。在下行方向上，射频部分2420通过天线2410接收接入网设备发送的信息，将接入网设备发送的信息发送给信号处理部分2430进行处理。在上行方向上，信号处理部分2430对终端装 置的信息进行处理，并发送给射频部分2420，射频部分2420对终端装置的信息进行处理后经过天线2410发送给接入网设备。
信号处理部分2430用于实现对数据各通信协议层的处理。信号处理部分2430可以为该终端装置的一个子系统，则该终端装置还可以包括其它子系统，例如中央处理子系统，用于实现对终端装置操作系统以及应用层的处理；再如，周边子系统用于实现与其它设备的连接。信号处理部分2430可以为单独设置的芯片。可选的，以上的装置可以位于信号处理部分2430。
信号处理部分2430可以包括一个或多个处理元件2431，例如，包括一个主控CPU和其它集成电路。此外，该信号处理部分2430还可以包括存储元件2432和接口电路2433。存储元件2432用于存储数据和程序，用于执行以上方法中终端装置所执行的方法的程序可能存储，也可能不存储于该存储元件2432中，例如，存储于信号处理部分2430之外的存储器中，使用时信号处理部分2430加载该程序到缓存中进行使用。接口电路2433用于与装置通信。以上装置可以位于信号处理部分2430，该信号处理部分2430可以通过芯片实现，该芯片包括至少一个处理元件和接口电路，其中处理元件用于执行以上终端装置执行的任一种方法的各个步骤，接口电路用于与其它装置通信。在一种实现中，实现以上方法中各个步骤的单元可以通过处理元件调度程序的形式实现，例如该装置包括处理元件和存储元件，处理元件调用存储元件存储的程序，以执行以上方法实施例中终端装置执行的方法。存储元件可以为处理元件处于同一芯片上的存储元件，即片内存储元件。
在另一种实现中，用于执行以上方法中终端装置所执行的方法的程序可以在与处理元件处于不同芯片上的存储元件，即片外存储元件。此时，处理元件从片外存储元件调用或加载程序于片内存储元件上，以调用并执行以上方法实施例中终端装置执行的方法。
在又一种实现中，终端装置实现以上方法中各个步骤的单元可以是被配置成一个或多个处理元件，这些处理元件设置于信号处理部分2430上，这里的处理元件可以为集成电路，例如：一个或多个ASIC，或，一个或多个DSP，或，一个或者多个FPGA，或者这些类集成电路的组合。这些集成电路可以集成在一起，构成芯片。
实现以上方法中各个步骤的单元可以集成在一起，以片上系统(system-on-a-chip，SOC)的形式实现，该SOC芯片，用于实现以上方法。该芯片内可以集成至少一个处理元件和存储元件，由处理元件调用存储元件的存储的程序的形式实现以上终端装置执行的方法；或者，该芯片内可以集成至少一个集成电路，用于实现以上终端装置执行的方法；或者，可以结合以上实现方式，部分单元的功能通过处理元件调用程序的形式实现，部分单元的功能通过集成电路的形式实现。
可见，以上装置可以包括至少一个处理元件和接口电路，其中至少一个处理元件用于执行以上方法实施例所提供的任一种压缩侧设备或者解压侧设备执行的方法。处理元件可以以第一种方式：即调用存储元件存储的程序的方式执行压缩侧设备或者解压侧设备执行的部分或全部步骤；也可以以第二种方式：即通过处理器元件中的硬件的集成逻辑电路结合指令的方式执行压缩侧设备或者解压侧设备执行的部分或全部步骤；当然，也可以结合第一种方式和第二种方式执行压缩侧设备或者解压侧设备执行的部分或全部步骤。
这里的处理元件同以上描述，可以是通用处理器，例如CPU，还可以是被配置成实施以上方法的一个或多个集成电路，例如：一个或多个ASIC，或，一个或多个微处理器DSP， 或，一个或者多个FPGA等，或这些集成电路形式中至少两种的组合。存储元件可以是一个存储器，也可以是多个存储元件的统称。
请参考图25，其为本申请实施例提供的一种核心网设备的结构示意图，用于实现以上实施例中压缩侧设备或者解压侧设备的操作。如图25所示，该核心网设备包括：处理器2510，存储器2520，和接口2530，处理器2510、存储器2520和接口2530信号连接。
以上实施例中压缩侧设备或者解压侧设备执行的方法可以通过处理器2510调用存储器2520中存储的程序来实现。即，用于压缩侧设备或者解压侧设备包括存储器和处理器，存储器用于存储程序，该程序被处理器调用，以执行以上方法实施例中的压缩侧设备或者解压侧设备执行的方法。这里的处理器可以是一种具有信号的处理能力的集成电路，例如CPU。用于核心网设备的装置可以通过配置成实施以上方法的一个或多个集成电路来实现。例如：一个或多个ASIC，或，一个或多个微处理器DSP，或，一个或者多个FPGA等，或这些集成电路形式中至少两种的组合。或者，可以结合以上实现方式。
本领域普通技术人员可以意识到，结合本文中所公开的实施例描述的各示例的单元及算法步骤，能够以电子硬件、或者计算机软件和电子硬件的结合来实现。这些功能究竟以硬件还是软件方式来执行，取决于技术方案的特定应用和设计约束条件。专业技术人员可以对每个特定的应用来使用不同方法来实现所描述的功能，但是这种实现不应认为超出本申请的范围。
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，以上所描述的装置实施例仅仅是示意性的，例如，所述单元的划分，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。另一点，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。
所述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。
另外，在本申请各个实施例中的各功能单元可以集成在一个处理单元中，也可以是各个单元单独物理存在，也可以两个或两个以上单元集成在一个单元中。
所述功能如果以软件功能单元的形式实现并作为独立的产品销售或使用时，可以存储在一个计算机可读取存储介质中。基于这样的理解，本申请的技术方案本质上或者说对现有技术做出贡献的部分或者该技术方案的部分可以以软件产品的形式体现出来，该计算机软件产品存储在一个存储介质中，包括若干指令用以使得一台计算机设备(可以是个人计算机，服务器，或者网络设备等)执行本申请各个实施例所述方法的全部或部分步骤。而前述的存储介质包括：U盘、移动硬盘、只读存储器(Read-Only Memory，ROM)、随机存取存储器(Random Access Memory，RAM)、磁碟或者光盘等各种可以存储程序代码的介质。
以上所述，仅为本申请的具体实施方式，但本申请的保护范围并不局限于此，任何熟 悉本技术领域的技术人员在本申请揭露的技术范围内，可轻易想到变化或替换，都应涵盖在本申请的保护范围之内。因此，本申请的保护范围应以所述权利要求的保护范围为准。

Claims (26)

  1. 一种传输信息的方法，其特征在于，包括：
    接收来自于压缩侧设备的以太帧和第一指示信息，所述第一指示信息用于指示是否建立或更新解压侧的上下文信息；
    当所述第一指示信息指示建立或更新上下文信息时，根据所述以太帧建立或更新解压侧的上下文信息；或者，
    当所述第一指示信息指示不建立或不更新上下文信息时，不根据所述以太帧建立或更新所述解压侧的上下文信息。
  2. 根据权利要求1所述的方法，其特征在于，所述接收来自于压缩侧设备的以太帧和第一指示信息，包括：
    接收来自于所述压缩侧设备的分组数据汇聚协议数据协议数据单元PDCP data PDU，所述PDCP data PDU中包括所述第一以太帧和所述第一指示信息。
  3. 根据权利要求2所述的方法，其特征在于，所述PDCP data PDU包括以太帧头压缩头，所述以太帧头压缩头中包括所述第一指示信息，其中，
    所述第一指示信息用于指示所述以太帧头压缩头是否包括上下文信息标识CID和头格式指示F字段，且当所述第一指示信息用于指示所述CID和所述F字段存在时，指示建立或更新上下文信息，当所述第一指示信息用于指示所述CID和所述F字段不存在时，指示不建立或不更新上下文信息；或者，
    所述以太帧头压缩头包括所述CID和所述F字段，所述第一指示信息用于指示是否根据所述CID和所述F字段建立或更新解压侧的上下文信息；或者，
    所述第一指示信息还用于指示所述以太帧为完整的以太帧或压缩的以太帧；或者，
    所述以太帧头压缩头包括所述CID，所述CID包括所述第一指示信息。
  4. 根据权利要求3所述的方法，其特征在于，所述F字段位于所述第一指示信息之前，且所述F字段指示所述以太帧为完整的以太帧。
  5. 根据权利要求2所述的方法，其特征在于，所述PDCP data PDU包括PDCP头，所述PDCP头包括所述第一指示信息，其中，
    所述第一指示信息用于指示所述PDCP data PDU中的以太帧头压缩头是否包括CID和F字段，且当所述第一指示信息用于指示所述CID和所述F字段存在时，指示建立或更新上下文信息，当所述第一指示信息用于指示所述CID和所述F字段不存在时，指示不建立或不更新上下文信息；或者，
    所述以太帧头压缩头包括所述CID和所述F字段，所述第一指示信息用于指示是否根据所述CID和所述F字段建立或更新解压侧的上下文信息。
  6. 根据权利要求1至5中任一项所述的方法，其特征在于，所述方法还包括：
    当所述第一指示信息指示不建立或不更新上下文信息时，不向所述压缩侧设备进行反馈。
  7. 一种传输信息的方法，其特征在于，包括：
    接收来自于压缩侧设备的第一以太帧和第一CID；
    根据所述第一以太帧，建立或者更新所述第一CID对应的上下文信息；
    向所述压缩侧设备发送第一反馈信息并启动第一定时器，所述第一反馈信息用于指示所述上下文信息已经建立或者更新完成；
    其中，在所述第一定时器运行期间内，不再对接收到的第二以太帧进行反馈，所述第二以太帧的以太帧头压缩头包括所述第一CID。
  8. 根据权利要求7所述的方法，其特征在于，所述方法还包括：
    接收来自于所述压缩侧设备的第三以太帧和所述第一CID；
    根据所述第三以太帧，更新所述第一CID对应的上下文信息；
    向所述压缩侧设备发送第二反馈信息并重启所述第一定时器，所述第二反馈信息用于指示所述第一CID对应的上下文信息已经更新完成。
  9. 根据权利要求7或8所述的方法，其特征在于，所述方法还包括：
    接收来自于所述压缩侧设备的第四以太帧和第二CID，所述第二CID与所述第一CID不同；
    根据所述第四以太帧，建立或更新所述第二CID对应的上下文信息；
    向所述压缩侧设备发送第三反馈信息并启动第二定时器，所述第三反馈信息用于指示所述第二CID对应的上下文信息已经建立或更新完成，
    其中，在所述第二定时器运行期间内，不再对接收到的第五以太帧进行反馈，所述第五以太帧的以太帧头压缩头包括所述第二CID。
  10. 一种传输信息的方法，其特征在于，包括：
    获取以太帧；
    向解压侧设备发送所述以太帧和第一指示信息，所述第一指示信息用于指示是否建立或更新解压侧的上下文信息。
  11. 根据权利要求10所述的方法，其特征在于，所述向解压侧设备发送所述以太帧和第一指示信息，包括：
    向解压侧设备发送PDCP data PDU，所述PDCP data PDU中包括所述第一以太帧和所述第一指示信息。
  12. 根据权利要求11所述的方法，其特征在于，所述PDCP data PDU包括以太帧头压缩头，所述以太帧头压缩头中包括所述第一指示信息，其中，
    所述第一指示信息用于指示所述以太帧头压缩头是否包括CID和F字段，且当所述第一指示信息用于指示所述CID和所述F字段存在时，指示建立或更新上下文信息，当所述第一指示信息用于指示所述CID和所述F字段不存在时，指示不建立或不更新上下文信息；或者，
    所述以太帧头压缩头包括所述CID和所述F字段，所述第一指示信息用于指示是否根据所述CID和所述F字段建立或更新解压侧的上下文信息；或者，
    所述第一指示信息还用于指示所述以太帧为完整的以太帧或压缩的以太帧；或者，
    所述以太帧头压缩头包括所述CID，所述CID包括所述第一指示信息。
  13. 根据权利要求12所述的方法，其特征在于，所述F字段位于所述第一指示信息之前，且所述F字段指示所述以太帧为完整的以太帧。
  14. 根据权利要求11所述的方法，其特征在于，所述PDCP data PDU包括PDCP头， 所述PDCP头包括所述第一指示信息，其中，
    所述第一指示信息用于指示所述PDCP data PDU中的以太帧头压缩头是否包括CID和F字段，且当所述第一指示信息用于指示所述CID和所述F字段存在时，指示建立或更新上下文信息，当所述第一指示信息用于指示所述CID和所述F字段不存在时，指示不建立或不更新上下文信息；或者，
    所述以太帧头压缩头包括所述CID和所述F字段，所述第一指示信息用于指示是否根据所述CID和所述F字段建立或更新解压侧的上下文信息。
  15. 根据权利要求10至14中任一项所述的方法，其特征在于，所述方法还包括：
    当所述第一指示信息用于指示建立或更新解压侧的上下文信息时，接收所述解压侧设备发送的反馈信息，所述反馈信息用于指示所述解压侧设备的上下文信息建立或者更新完成。
  16. 一种传输信息的方法，其特征在于，包括：
    向解压侧设备发送第一以太帧和第一上下文信息标识CID并启动第一定时器；
    在所述第一定时器运行期间内，向所述解压侧设备发送第二以太帧和第一指示信息，所述第一指示信息用于指示所述解压侧设备不建立或者不更新上下文信息，所述第二以太帧的以太帧头压缩头包括所述第一CID。
  17. 根据权利要求16所述的方法，其特征在于，所述方法还包括：
    根据第三以太帧，更新所述第一CID对应的上下文信息；
    向所述解压侧设备发送第三以太帧和所述第一CID并重新启动所述第一定时器。
  18. 根据权利要求16或17所述的方法，其特征在于，所述方法还包括：
    向所述解压侧设备发送第四以太帧和第二CID并启动第二定时器，所述第二CID与所述第一CID不同；
    在所述第二定时器运行期间内，向所述解压侧设备发送第五以太帧和第二指示信息，所述第二指示信息用于指示解压侧设备不建立或者不更新上下文信息，所述第五以太帧的以太帧头压缩头包括所述第二CID。
  19. 一种传输信息的装置，其特征在于，包括：用于执行权利要求1至9中任一项所述的各个步骤的单元。
  20. 一种传输信息的装置，其特征在于，包括：处理器，用于调用存储器中的程序，以执行权利要求1至9任一项所述的方法。
  21. 一种传输信息的装置，其特征在于，包括：处理器和接口电路，所述接口电路用于与其它装置通信，所述处理器用于执行权利要求1至9任一项所述的方法。
  22. 一种传输信息的装置，其特征在于，包括：用于执行权利要求10至18任一项所述的各个步骤的单元。
  23. 一种传输信息的装置，其特征在于，包括：处理器，用于调用存储器中的程序，以执行权利要求10至18任一项所述的方法。
  24. 一种传输信息的装置，其特征在于，包括：处理器和接口电路，所述接口电路用于与其它装置通信，所述处理器用于执行权利要求10至18任一项所述的方法。
  25. 一种计算机可读存储介质，其特征在于，所述计算机可读存储介质存储程序，所述程序被处理器调用时，权利要求1至18任一项所述的方法被执行。
  26. 一种计算机程序，其特征在于，当所述程序被处理器调用时，权利要求1至18任一项所述的方法被执行。
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LG ELECTRONICS INC: "Discussion on Ethernet header compression", 3GPP DRAFT; R2-1907554_DISCUSSION ON ETHERNET HEADER COMPRESSION_R5, vol. RAN WG2, 3 May 2019 (2019-05-03), Reno, USA, pages 1 - 3, XP051711836 *
QUALCOMM INCORPORATED: "Principles for EHC header design", 3GPP DRAFT; R2-1913644 PRINCIPLES FOR EHC HEADER DESIGN VSUBMIT, vol. RAN WG2, 4 October 2019 (2019-10-04), Chongqing, China, pages 1 - 3, XP051791637 *
SAMSUNG: "Feedback for EHC algorithm", 3GPP DRAFT; R2-1912527 FEEDBACK FOR EHC ALGORITHM, vol. RAN WG2, 4 October 2019 (2019-10-04), Chongqing, China, pages 1 - 3, XP051790570 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113411838A (zh) * 2021-06-28 2021-09-17 展讯通信（上海）有限公司 基于头信息压缩的通信方法及设备
CN113411838B (zh) * 2021-06-28 2022-10-28 展讯通信（上海）有限公司 基于头信息压缩的通信方法及设备

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