WO2017156682A1

WO2017156682A1 - Data transmission method based on channel binding

Info

Publication number: WO2017156682A1
Application number: PCT/CN2016/076295
Authority: WO
Inventors: 高波
Original assignee: 华为技术有限公司
Priority date: 2016-03-14
Filing date: 2016-03-14
Publication date: 2017-09-21

Abstract

Disclosed in the embodiments of the present invention is a data transmission method based on channel binding, comprising: establishing or updating a channel binding table; when transmitting a first service stream of one or a plurality of service streams, inserting a first service-stream identifier into a data frame of said first service stream; according to said channel binding table and said first service-stream identifier, determining a channel binding group of the first service stream; if the quantity of channels comprised by the channel binding group of the first service stream is greater than 1, then inserting a transmission sequence number into the data frame of the first service stream, said transmission sequence number being used for the data frame of the first service stream, reassembled and received by a receiving-side device; using the channel in the channel binding group of said first service stream to transmit the data frame of the first service stream. By using channel binding to perform data transmission, it is possible to use low-speed, low-cost hardware to bear a high-speed service stream.

Description

Data transmission method based on channel binding

Technical field

The embodiments of the present invention relate to communication technologies, and in particular, to a data transmission method based on channel bonding.

Background technique

FIG. 1 is a schematic diagram of a typical Ethernet networking model. As shown in FIG. 1 , the networking model includes a core layer switch, an aggregation layer switch, and an access layer switch. The access layer switch is connected to various types of terminals, for example, a personal computer (English: Personal Computer; PC for short). The switches used in the networking model include a Layer 2 Ethernet switch (hereinafter referred to as L2) and a Layer 3 Ethernet switch (hereinafter referred to as L3). Among them, the core layer switch adopts high-end L3/L2, the aggregation layer switch adopts the low-end L3/L2, and the access layer switch adopts the low-end L2.

2 is a schematic diagram of an Ethernet frame format. As shown in FIG. 2, the Ethernet frame includes the following fields: a preamble (English: preamble), a frame start delimiter (English: Start Frame Delimiter; abbreviation: SFD). , destination address (English: Destination Address; abbreviation: DA), source address (English: Source Address; abbreviation: SA), length / type (English: length / type), MAC layer client data (English: MAC client data) Frame check sequence (English: Frame Check Sequence; FCS for short). In addition, the Ethernet frame may further include a redundancy (English: pad) field and an extension (English: extension) field. The preamble field is 7 bytes with a value of 0x55, and is used for receiving side synchronization. The SFD field is a byte with a value of 0xd5. If the length/type field is 2 bytes, if the value of the length/type field is less than 0x600, it indicates the payload length. If the value of the length/type field is greater than or equal to 0x600, it indicates the frame type. It should be noted that 0x55, 0xd5 and 0x600 are hexadecimal numbers.

By introducing a virtual local area network (English: Virtual Local Area Network; for short: VLAN), when a device moves from one location to another, its network attributes do not need to be reconfigured, and the corresponding port configuration can be accessed at up to L2. Network, reducing the cost of updating and changing hardware and network management costs.

FIG. 3 is a schematic diagram of a VLAN frame format, as shown in FIG. 3, the VLAN frame is compared to an Ethernet frame. It also includes the following fields: a length/type field with a value of 0x8100 (representing a VLAN tag defined by IEEE 802.1Q) and a tag control information field. The tag control information field carries a virtual local area network identifier (English: VLAN Identify; abbreviated as: VID).

Ethernet Passive Optical Network (EPON) technology and standards are developed on the basis of IEEE802.3, compatible with ubiquitous Ethernet technologies and devices, and can reuse a large number of existing matures. Devices and circuits are designed to achieve low risk, and the technology and industry chain are relatively mature and low cost. In an EPON-based point-to-multipoint network structure, an optical line terminal (English: Optical Line Terminal; OLT for short) communicates with multiple optical network units (English: Optical Network Unit; ONU). The optical network unit may also be referred to as an optical network terminal (English: Optical Network Terminal; referred to as: ONT). To distinguish between different ONUs, each ONU needs to be assigned a unique logical link identifier (English: Logical Link Identity; LLID for short) as the identifier of the ONU. In addition, there are multiple LLID scenarios, that is, the OLT allocates multiple LLIDs to one ONU at the same time, and each LLID independently initiates registration with the OLT, and performs normal data service forwarding with the OLT. Among them, each LLID can be regarded as a logically existing virtual ONU.

The simultaneous occurrence of data by multiple ONUs to the OLT may cause signal collisions and affect the normal transmission of the OLT. Therefore, the OLT needs to coordinate the transmission of the ONU by means of time slice authorization, and ensure that only one ONU is allowed to send data in a certain time period, which can effectively avoid conflicts. The EPON standard defines a Multi-Point Control Protocol (MPCP) for registering ONUs and controlling and coordinating different ONUs with Time Division Multiple Access (English: Time Division Multiple Access; TDMA) shares the EPON network and sends upstream data.

10GEPON appeared on the basis of EPON. The MAC layers of 10GEPON and EPON are basically the same. The main difference lies in the protocol layer below the MAC. In order to meet the greater bandwidth demand in the future, based on the original 10GEPON, the standard requirements of 100GEPON are proposed. 100GEPON is the next EPON system for 10GEPON, which can provide more bandwidth.

The above Ethernet, EPON, 10GEPON, and 100GEPON are point-to-multipoint communication networks. In point-to-multipoint communication networks, channel bonding is often used to increase transmission bandwidth and improve transmission capacity. The channel binding may have the following implementation manner: the sending side device distributes the data frame of the high speed service flow to multiple The low-speed transmission channel transmits, and the receiving-side device receives the data frame of the high-speed service flow from the plurality of low-speed receiving channels, and recovers the high-speed service flow in the order of the data frame of the high-speed service flow. When the data frames of the service flow are transmitted based on the channel binding in the point-to-multipoint communication network, since the different channels have different delays, the data frame disorder of the service flow is generated on the receiving side, and the data cannot be recovered. The original business flow.

Summary of the invention

In view of this, the embodiment of the present invention provides a data transmission method based on channel binding, so as to realize direct use of existing hardware for high-speed service stream transmission, thereby saving cost, and further avoiding data transmission based on channel binding. The data frame is out of order.

In a first aspect, an embodiment of the present invention provides a data transmission method based on channel bonding, where the channel binding is performed on a PON MAC layer. In the method, a channel binding table is established or updated, and the entry of the channel binding table includes at least one or more service flow identifiers and one or more channel bonding groups. The number of the one or more service flow identifiers is the same as the number of the one or more channel binding groups, the one or more service flow identifiers indicating one or more service flows, the one or more Each of the service flows in the service flow has a one-to-one correspondence with each of the one or more channel bonding groups, wherein each channel bonding group includes one or more bound channels. When the first traffic flow in the one or more service flows is performed, the first service flow identifier is inserted in the data frame of the first service flow. Determining, according to the channel binding table and the first service flow identifier, a channel binding group of the first service flow, if the number of channels included in the channel binding group of the first service flow is greater than 1, the first A transmission sequence number is inserted into the data frame of the service flow, and the transmission sequence number is used by the receiving device to reassemble the data frame of the first service flow received by the receiving device. Then, the data frame of the first service flow is transmitted by using the channel in the channel bonding group of the first service flow.

By using channel bonding for data transmission, it is possible to utilize low-speed, low-cost hardware to carry high-speed traffic. At the same time, the channel binding of the embodiment of the present invention is performed on the PON MAC layer, and the change or update of the existing hardware is very small. Therefore, the hardware can be directly used without redesigning the hardware. There is hardware for channel-based data transfer, which results in significant cost savings.

Further, the data frame of the first service flow includes a length/type field and a frame sequence number field; the length/type field is used to indicate whether the data frame of the first service flow carries a transmission sequence number; if the length/type The field indicates that the data frame of the first service flow carries the transmission sequence number, and the frame sequence number field is used to indicate the value of the transmission sequence number. By adding a transmission sequence number in a data frame, the problem of data frame disorder caused by channel-bound transmission data can be effectively solved.

Further, when the receiving side device is an optical network unit ONU, a service configuration message is sent, where the service configuration message instructs the ONU to establish or update a channel binding table of the ONU, so that the ONU transmits the service flow based on the channel binding. The service configuration message carries the second service flow identifier and the channel configuration indication; the second service flow identifier is used to indicate the second service flow; the channel configuration indication is used to indicate that the channel in the ONU joins or exits the second service. The channel bonding group of the stream. By sending a service configuration message, the channel binding table can be updated flexibly and in a timely manner, so that the channel binding is more suitable for service flow transmission.

In a second aspect, an embodiment of the present invention provides a data transmission method based on channel bonding, where the channel binding is performed on a PON MAC layer. The method includes: receiving a data frame, where the data frame carries a service flow identifier field and a transmission sequence number; determining, according to the service flow identifier, a service flow in which the data frame is located; storing the data frame in a buffer queue corresponding to the service flow; The service flow is sequentially reorganized according to the transmission sequence number of the data frame. Specifically, for the received data frame, the transmission sequence number of the data frame is reassembled according to the transmission order of the data frame.

The service flow identifier may be a VID. The transmission sequence number can be indicated by inserting a length/type field and an FSN field in the data frame. The length/type field indicates whether the transmission sequence number is carried in the data frame. If the data frame carries the transmission sequence number, the FSN field indicates the value of the transmission sequence number.

In a third aspect, an embodiment of the present invention provides a data transmission apparatus based on channel binding, where the channel is bound to be performed on a PON MAC layer. The apparatus includes an establishment and update unit, an insertion unit, and a transmission unit. The establishment and update unit is configured to establish or update a channel binding table. The entry of the channel binding table includes at least one or more service flow identifiers and one or more channel bonding groups. Wherein the number of the one or more service flow identifiers is the same as the number of the one or more channel binding groups, the one or more service flow identifiers indicating one or more service flows, the one or more Each of the service flows in the service flow has a one-to-one correspondence with each of the one or more channel bonding groups, wherein each channel bonding group includes one or more bound channels. The inserting unit is configured to insert a first service flow identifier in a data frame of the first service flow when performing the first service flow transmission in the one or more service flows; according to the channel binding table and Determining, by the first service flow identifier, a channel binding group of the first service flow, if the number of channels included in the channel bonding group of the first service flow is greater than 1, inserting in a data frame of the first service flow And sending a sequence number, where the sending sequence number is used for receiving, by the receiving device, the data frame of the first service flow received by the device. The transmission unit is configured to transmit a data frame of the first service flow by using a channel in a channel bonding group of the first service flow.

The data frame of the first service flow includes a length/type field and a frame sequence number field; the length/type field is used to indicate whether the data frame of the first service flow carries a transmission sequence number; if the length/type field Indicates that the data frame of the first service flow carries a transmission sequence number, and the frame sequence number field is used to indicate the value of the transmission sequence number.

In a fourth aspect, an embodiment of the present invention provides a data transmission apparatus based on channel binding, where the channel binding is performed on a PON MAC layer. The device comprises a receiving unit, a determining unit and a processing unit. The receiving unit is configured to receive a data frame, where the data frame carries a service flow identifier field and a sending sequence number. The determining unit is configured to determine, according to the service flow identifier, a service flow in which the data frame is located. The processing unit is configured to store the data frame in a buffer queue corresponding to the service flow; and sequentially reassemble the service flow according to the sending sequence number of the data frame. Specifically, for the received data frame, the transmission sequence number of the data frame is reassembled according to the transmission order of the data frame.

In a fifth aspect, an embodiment of the present invention provides a data transmission device based on channel binding, where the channel is bound to be performed on a PON MAC layer. The device comprises: a processor, a memory, a transmitter, a receiver and a bus, wherein the processor, the memory, the transmitter and the receiver are connected by a bus Data transfer is performed, and the memory is used to store data processed by the processor. The transmitter and the receiver are configured to send and receive messages, and the processor is configured to implement the channel binding based data transmission method in the above embodiment by executing program code in the memory.

In a sixth aspect, the embodiment of the present invention further provides a non-transitory computer readable storage medium, when the instructions in the storage medium are executed by a processor of a network device, enabling the network device to perform any of the foregoing channel-based Bind data transfer method.

Some technical features related to the second to sixth aspects of the embodiments of the present invention, such as: channel binding, service flow identification, transmission sequence number, etc., and other further descriptions (such as channel binding table, data frame recombination, etc.) And some technical features related to the first aspect are similar or corresponding, and the repeated description is not repeated here.

In the embodiment of the present invention, by using channel bonding for data transmission, low-speed and low-cost hardware can be used to carry high-speed service flows. At the same time, the channel binding of the embodiment of the present invention is performed on the PON MAC layer, and the change or update of the existing hardware is very small. Therefore, the data transmission based on the channel binding can be directly used by using the existing hardware without redesigning the hardware. Significant cost savings. Further, by adding a transmission sequence number in the data frame, the data frame disorder caused by the channel binding transmission data can be effectively solved.

DRAWINGS

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings to be used in the embodiments will be briefly described below. It is obvious that the drawings in the following description are only some embodiments of the present invention. Those skilled in the art can also obtain other drawings based on these drawings without paying any creative work.

FIG. 1 is a schematic diagram of a typical Ethernet networking model;

2 is a schematic diagram of an Ethernet frame format;

3 is a schematic diagram of a VLAN frame format;

4 is a schematic diagram of a typical point-to-multipoint network structure;

4a is a schematic structural diagram of a point-to-multipoint network including a channel binding function according to an embodiment of the present invention;

FIG. 5 is a schematic diagram of a specific implementation manner of a channel binding function;

FIG. 6 is a schematic diagram of a data transmission method based on channel binding according to an embodiment of the present disclosure;

Figure 6a is a schematic diagram of inserting a transmission sequence number in an Ethernet frame;

FIG. 6b is a schematic diagram of a service configuration message format according to an embodiment of the present invention;

FIG. 6c is a schematic diagram of another service configuration message format according to an embodiment of the present disclosure;

FIG. 7 is a schematic diagram of another method for data transmission based on channel binding according to an embodiment of the present disclosure;

FIG. 8 is a schematic diagram of a data transmission apparatus based on channel binding according to an embodiment of the present invention;

FIG. 9 is a processing device according to an embodiment of the present invention.

detailed description

The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, but not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

FIG. 4 is a schematic diagram of a typical point-to-multipoint network structure. As shown in FIG. 4, the network structure is mainly composed of an OLT, an ONU, and an ODN. In the point-to-multipoint network structure, one optical fiber carries uplink and downlink data signals, and the optical signal is equally divided into N paths through a 1:N optical splitter to cover multiple access points or access users. Where N is an integer greater than one.

In the downlink direction, the OLT provides a fiber-optic interface for the optical distribution network (English: Optical Distribution Network; ODN for short); in the uplink direction, the OLT can provide a Gigabit Ethernet optical/electrical interface. The ODN consists of a passive fiber splitter and fiber. The passive fiber splitter is a passive device that connects the OLT and the ONU. Its function is to distribute downlink data and aggregate uplink data. The passive splitter is quite flexible to deploy, and because it is a passive device, it can be adapted to almost all environments. EPON The ONU adopts the Ethernet protocol, and no protocol conversion is needed in the process of communication, so that the ONU transparently transmits the user data.

A point-to-multipoint communication network such as that of FIG. 4 needs to be in the preamble of each data frame (eg, an Ethernet frame) in order to overcome the out-of-order problem of the data frame of the service flow when transmitting the data frame of the service flow based on the channel binding. Inserting the frame transmission sequence number, so that the channel binding can only be performed below the MAC layer and above the RS layer, and the MAC chip of the current passive optical network changes greatly, resulting in an excessive update cost.

FIG. 4 is a schematic diagram of a point-to-multipoint network structure including a channel binding function according to an embodiment of the present invention. As shown in FIG. 4a, the OLT may include Wavelength Division Multiplexing (WDM). For 4 channels, ONU1 can contain 4 channels, and ONU2 can contain 2 channels. Each channel includes a PHY layer and a PON MAC layer. When performing service flow transmission, especially high-speed service flow transmission, channel binding can be performed on the PON MAC layer for the service flow, so that multiple channels in the OLT or ONU can transmit the same service flow. Channel bonding on the PON MAC layer changes the MAC chip of the current passive optical network to a small extent, which can save the cost of updating hardware. It should be noted that, in actual implementation, the OLT can communicate with more or fewer ONUs, and the number of channels of the OLT and the ONU is not limited to four or two, and may be arbitrary according to actual conditions. One. All channels of the OLT or ONU may not be channel bound. You can select some channels for channel binding according to actual needs. However, the number of channels bound by each ONU channel cannot be greater than the number of channels of the OLT.

FIG. 5 is a schematic diagram of a specific implementation manner of a channel binding function. As shown in FIG. 5, the implementation manner includes four channels, and each channel includes an MPCP layer, a MAC layer, and a harmonic sublayer (English: Reconciliation Sublayer; RS), Physical Coding Sublayer (PCS), Physical Medium Attachment (PMA) layer, Physical Medium Dependent (PMD) layer . The harmonic sublayer and the physical coding sublayer are connected by a media independent interface (English: Media Independent Interface; MII for short). Operation Management and Maintenance (English: Operational Administration and Maintenance; OAM) client and data client generation The traffic can be transmitted on up to 4 channels through channel bonding. The implementation manner performs channel binding on the service flow formed by the data frame (for example, the Ethernet frame) on the MPCP layer, keeps the current PONMAC protocol and implementation unchanged, minimizes the impact on the product, does not affect the current PON MAC chip implementation, and updates. The cost is lower.

Channel bonding means that the receiving side needs to transmit a sequence number based on the received data frame when reassembling in the original transmission order. Thus the implementation shown in Figure 4 or Figure 5 requires the insertion of a transmission sequence number in the data frame.

The following describes a method for transmitting a service flow based on a channel binding by using a sending device (which may be an OLT or an ONU) as an example. Through this method, the problem of data frame disorder in the data transmission process based on channel binding can be effectively solved.

FIG. 6 is a schematic diagram of a data transmission method based on channel binding according to an embodiment of the present invention. As shown in FIG. 6, the data transmission method includes:

Step 601: Establish or update a channel binding table, where the entry of the channel binding table includes at least one or more service flow identifiers and one or more channel binding groups, where the number of service flow identifiers is bound to the channel The number of groups is the same, the one or more service flow identifiers indicating one or more service flows, each of the one or more service flows being associated with each of the one or more channel binding groups The channel binding groups correspond one-to-one. Each of the channel bonding groups includes one or more bound channels. In the embodiment of the present invention, the bound channel refers to a channel for channel bonding.

Specifically, when the sending side device is an OLT and the receiving side device is an ONU, the available channel information can be collected and recorded according to the registration status of the ONU on one or more channels of the OLT, and the channel binding requirement is required according to the channel configuration during service configuration. Add related items. Alternatively, the channel binding table is automatically or manually updated according to the channel load or fault condition of the transmitting device. For example, current channels 1, 2, 3, and 4 are available, and for service flow 1, three channels need to be bound. Therefore, you can add a channel bonding group for traffic flow 1, which includes three bonded channels (for example, channels 1, 2, 4 or channels 2, 3, 4, etc.). The bound channel is indicated by its corresponding logical channel identifier (hereinafter may be referred to as a Channel ID). The logical channel identifier may be a lane identifier or a wavelength channel. Any one of an identification, a logical identifier (such as LLID or GEMport-ID), or a PON port identifier of an ONU device.

For example, the channel binding table may have the form shown in Table 1: where the channel bonding group corresponding to service flow 1 includes channels 1, 2, and 4; and the channel binding group corresponding to service flow 2 includes channels 1, 3 .

Table 1 A channel binding table provided by an embodiment of the present invention

业务流标识Service flow identifier	通道绑定组Channel bonding group
业务流1Business flow 1	通道1、2、4Channel 1, 2, 4
业务流2Business flow 2	通道1、3Channel 1, 3
……......	……......

Step 602: Insert the first service flow identifier in the data frame of the first service flow when performing the first service flow transmission in the one or more service flows.

Specifically, the first service flow identifier may be a VID of the first service flow.

Step 603: Determine a channel binding group of the first service flow according to the channel binding table and the first service flow identifier, and if the channel binding group of the first service flow includes more than one channel, A transmission sequence number is inserted in the data frame of the first service flow, where the transmission sequence number is used by the receiving side device to reassemble the data frame of the first service flow received.

Specifically, the channel binding group of the first service flow is searched in the channel binding table according to the first service flow identifier, or the channel binding table is matched according to the first service flow identifier, and the channel binding of the first service flow is matched. Set. If the channel binding group of the first service flow includes more than one channel, the transmission sequence number is inserted in the data frame of the first service flow according to the sending sequence. The transmission sequence number is a value according to the actual transmission order, and the specific value and value form are not limited in the present invention. In another possible implementation manner, if the first service flow is performed, the number of channels in the channel bonding group of the first service flow changes (for example, the number of channels is reduced due to a certain fault) When the number of the channels becomes 1, the transmission sequence number may be inserted in the data frame of the subsequent first service flow, so that the receiving side device reassembles all the data frames of the first service flow.

The following describes how to insert a transmission sequence by taking an Ethernet frame as a data frame of the first service flow. number.

Figure 6a is a schematic diagram of the insertion of a transmission sequence number in an Ethernet frame, as shown in Figure 6a, where the gray portion is the insertion portion. The length/type field of the gray part takes a special value, such as 0x8200, indicating that the Ethernet frame carries the transmission sequence number. The frame serial number (English: Frame Serial Number; FSN) field of the gray part indicates the transmission sequence number of the service flow in which the Ethernet frame is located. The specific length of the FSN field is not limited in the present invention. It should be noted that the length/type field and the FSN field are two consecutive fields, but their positions are not limited as long as they are between the SA field and the MAC layer client length/type field.

Step 604: Transmit a data frame of the first service flow by using a channel in the channel bonding group of the first service flow.

Specifically, the data frame of the first service flow is distributed or transmitted according to the available condition or occupation of the channel in the channel bonding group of the first service flow. For example, in the channel included in the channel bonding group, the data frame of the first service flow is transmitted by using an idle channel or a channel with fewer data frames to be transmitted. For example, in the three channels bound to the traffic flow 1 shown in Table 1, only the channels 1 and 2 are idle, and the channels 1 and 2 can be used to transmit the data frames of the first service flow, and when the channel 4 is transmitted in the subsequent service flow. Channels 1, 2, and 4 can also be utilized to transmit data frames of the first traffic flow when available in the process.

It should be noted that the ONU transport service flow may have the same or similar method as the OLT transport service flow (that is, the uplink service flow transmission may be the same as or similar to the downlink service flow transmission, and only needs to be targeted in the actual implementation process. The specific equipment can be adapted to change, and will not be described here. In a possible implementation, when the sending device is an OLT and the receiving device is an ONU, the channel binding table of the receiving device needs to be established or updated according to the received service configuration message. Therefore, optionally, the OLT further sends a service configuration message, and the specific implementation manner is as follows:

Step 605: Send a service configuration message, where the service configuration message instructs the ONU to establish a channel binding table, so that the ONU transmits the service flow based on the channel binding.

Specifically, the service configuration message may be an MPCP or an OAM message in the EPON system, and the Gigabit Passive Optical Network (GPON) The system can be a physical layer operation and maintenance (English: Physical Layer Operation and Maintenance; PLOAM for short) or an ONU management and control interface (English: ONUManagement and Control Interface; OMCI) message. The specific message format of the message, as well as the name, the length, the location, and the value of the specific field are not limited in the embodiment of the present invention. The service configuration message includes at least a service flow identifier and a channel configuration indication. The service flow identifier indicates the service flow bound by the channel, and the channel configuration indication is used to indicate that the channel joins or exits the channel binding group of the service flow.

That is, the ONU can establish or update the channel binding table according to the received service configuration message, or establish or update the binding relationship between the service flow to be transmitted by the ONU and the available channel. By establishing or updating a channel binding table, the ONU can also transmit traffic based on channel bonding. In a possible implementation manner, when the usage of the channel or the entry in the channel binding table changes, the channel binding table of the ONU is updated by sending a service configuration message. For example, if the number of available channels of the OLT or the ONU is reduced, and the number of available channels of the OLT or the ONU is increased, the information about the available channels of the ONU and the related entries in the channel binding table need to be updated in time. The ONU is instructed to update the channel binding table by sending a service configuration message.

The following describes the composition of the service configuration message based on the MPCP message. The service configuration message based on the PLOAM message or the OMCI message is similar, and will not be described here.

Figure 6b is a schematic diagram of a service configuration message format according to an embodiment of the present invention. As shown in Figure 6b, a service flow identifier (English: Service Identification; SID) field and a tag group are inserted on the basis of the MPCP message. The flag group field is used to get the service configuration message. The SID field indicates the service flow that needs to be bound by the channel. The SID field may specifically be a combination of one or more of a VID, a MAC address, or other service flow logical identifier (eg, LLID or GEMport-ID). The tag group field is used as a channel configuration indicator, which indicates that the ONU uplink channel joins or exits the channel bonding group corresponding to the service flow indicated by the SID. When the uplink and downlink channels of the ONU are 1:1, the label group field is used to indicate that the uplink channel corresponding to the downlink channel that receives the command on the ONU joins or exits the channel binding group corresponding to the service flow. The tag group field takes the first value (such as 0) to indicate exit The channel bonding group takes a second value (such as 1) to join the channel bonding group. When the ONU downlink channel corresponds to multiple uplink channels, the field is a bit (English: bit) bitmap, where each bit corresponds to an uplink channel. For example, when the field length is 8 bits, the first bit indicates ONU uplink channel 1 The second bit represents the ONU upstream channel 2, and so on, the eighth bit represents the ONU upstream channel 8. If a bit is 0, the ONU upstream channel corresponding to the bit is removed from the channel bonding group or the binding relationship is removed. The 1 indicates that the ONU uplink channel corresponding to the bit is added to the channel bonding group or establishes a binding relationship.

FIG. 6 is a schematic diagram of another service configuration message format according to an embodiment of the present invention. As shown in FIG. 6c, a service flow identifier SID field, a flag (English: flag) field, and a flag field corresponding to the flag field are inserted on the basis of the MPCP message. The Channel ID field is used to get the service configuration message. The meaning of the SID is the same as or similar to that of FIG. 6b. The Channel ID field is used to identify a channel. The corresponding flag field indicates that the channel exits or joins the channel bonding group of the service flow indicated by the SID. The flag field takes a first value (such as 0) to indicate that the channel identified by the Channel ID field corresponding to the flag field exits the channel bonding group, and the second value (such as 1) indicates that the flag field corresponding to the flag field is identified by the Channel ID field. The channel is added to the channel bonding group. In an optional implementation manner, one or more flag fields and a Channel ID field corresponding to each other may be provided according to actual needs. Further, the service configuration message further includes a configured channel number field, where the configured channel number field is used to indicate the number of channels to join or exit the channel bonding group or to indicate the number of flag fields.

It should be noted that the positions, names, lengths, and values of the fields inserted in FIG. 6b and FIG. 6c are not limited in the embodiment of the present invention. The number of bytes in the fields shown in FIG. 6b and FIG. 6c is only an example. Can be changed according to actual needs.

FIG. 7 is a schematic diagram of another method for data transmission based on channel binding according to an embodiment of the present invention. As shown in FIG. 7, the data transmission method includes:

Step 701: Receive a data frame, where the data frame carries a service flow identifier field and a transmission sequence number.

Step 702: Determine, according to the service flow identifier, a service flow in which the data frame is located.

Step 703: The data frame is stored in a buffer queue corresponding to the service flow.

Step 704: Perform sequence reorganization on the service flow according to the sending sequence number of the data frame. Specific The data frame is reassembled according to the transmission sequence of the data frame according to the transmission sequence of the data frame.

The OLT or the ONU has a correspondence between the processing of the data frame of the received service flow and the processing of the transmission side of the service flow. Some of the technical features involved, such as: channel binding, service flow identification, sending serial number, etc., and other further descriptions (such as channel binding table, data frame recombination, etc.), and related to the above method embodiments Some technical features are similar or corresponding and will not be repeated here.

It should be noted that whether it is an OLT or an ONU, channel bonding and unbinding are performed at the service level and are independent of the PON protocol.

By using channel bonding for data transmission, it is possible to utilize low-speed, low-cost hardware to carry high-speed traffic. At the same time, the channel binding of the embodiment of the present invention is performed on the PON MAC layer, and the change or update of the existing hardware is very small. Therefore, the data transmission based on the channel binding can be directly used by using the existing hardware without redesigning the hardware. Significant cost savings. Further, by adding a transmission sequence number in the data frame, the data frame disorder caused by the channel binding transmission data can be effectively solved.

You can flexibly configure the channel bonding group of the upstream service flow of the ONU by carrying the service flow identifier and the channel configuration indicator in the service configuration message. The service channel-based flexible channel binding function is realized on the basis of reusing the existing PON MAC chip, and the ONUs capable of flexibly supporting different transmission rates coexist in the same PON system. Therefore, system transmission efficiency can be optimized.

Embodiments of the present invention further provide an apparatus embodiment for implementing the steps and methods in the foregoing method embodiments. FIG. 8 is a schematic diagram of a data transmission apparatus based on channel binding according to an embodiment of the present invention, As shown in Figure 8, the device includes:

The establishing and updating unit 801 is configured to establish or update a channel binding table, where the entry of the channel binding table includes at least one or more service flow identifiers and one or more channel binding groups, where one or more The number of service flow identifiers is the same as the number of the one or more channel binding groups, the one or more service flow identifiers indicating one or more service flows, each of the one or more service flows The flow respectively corresponds to each of the one or more channel bonding groups, wherein each channel bonding group includes one or more bound channels;

The inserting unit 802 is configured to insert a first service flow identifier in a data frame of the first service flow when performing the first service flow transmission in the one or more service flows; according to the channel binding table and the first a service flow identifier, the channel binding group of the first service flow is determined, and if the number of channels included in the channel bonding group of the first service flow is greater than 1, the sending sequence is inserted in the data frame of the first service flow No. The sending sequence number is used by the receiving device to reassemble the data frame of the first service flow received by the receiving device.

The transmitting unit 803 is configured to transmit, by using a channel in the channel bonding group of the first service flow, a data frame of the first service flow.

Further, the transmitting unit 803 is further configured to: when the receiving side device is an optical network unit ONU, send a service configuration message, where the service configuration message instructs the ONU to establish or update a channel binding table of the ONU, so that the ONU is tied based on the channel The transport traffic is fixed.

The service configuration message carries the second service flow identifier and the channel configuration indication; the second service flow identifier is used to indicate the second service flow; the channel configuration indication is used to indicate that the channel in the ONU joins or exits the second service. The channel bonding group of the stream.

The embodiment of the present invention further provides a processing device, as shown in FIG. 9, comprising: a processor 901, a memory 902, a transmitter 903, a receiver 905, and a bus 904, wherein the processor 901 and the memory 902, the transmitter 903 and the receiver 905 are connected by a bus 904 for data transmission, and the memory 902 is used for storing data processed by the processor 901;

The bus 904 can be an Industry Standard Architecture (ISA) bus, a Peripheral Component (PCI) bus, or an Extended Industry Standard Architecture (EISA) bus. Etc., here is not limited. The bus 904 can be divided into an address bus, a data bus, a control bus, and the like. For ease of representation, only one thick line is shown in Figure 9, but it does not mean that there is only one bus or one type of bus. among them:

The memory 902 is used to store data or executable program code, where the program code includes computer operating instructions, which may specifically be: an operating system, an application, or the like. Memory 902 may include high speed RAM memory and may also include non-volatile memory, such as at least one disk memory.

The processor 901 may be a central processing unit (CPU), or an application specific integrated circuit (ASIC), or one or more configured to implement the embodiments of the present invention. integrated circuit.

The transmitter 903 and the receiver 905 are configured to send and receive messages, and the processor 901 is configured to implement the channel binding-based data transmission method in the foregoing embodiment by executing program code in the memory 902, where some technical features are involved, for example: Channel binding, service flow identification, sending sequence number, etc., and other further descriptions (such as channel binding table, data frame recombination, etc.), similar or corresponding to some technical features involved in the foregoing method embodiments, Repeat the description.

The present invention also provides a non-transitory computer readable storage medium, which enables a network device to perform any of the above-described channel binding based data transmission methods when instructions in the storage medium are executed by a processor of the network device Some technical features involved, such as: channel binding, service flow identification, sending serial number, etc., and other further descriptions (such as channel binding table, data frame recombination, etc.), and related to the above method embodiments Some of the technical features are similar or corresponding, and the repeated description is not repeated here.

Through the description of the above embodiments, those skilled in the art can clearly understand that the present invention can be implemented in hardware, firmware implementation, or a combination thereof. When implemented in software, the functions described above may be stored in or transmitted as one or more instructions or code on a computer readable medium. Computer readable media includes both computer storage media and communication media including any medium that facilitates transfer of a computer program from one location to another. A storage medium may be any available media that can be accessed by a computer. By way of example and not limitation, computer readable media may comprise RAM, ROM, EEPROM, CD-ROM or other optical disk storage, disk storage media or other magnetic storage device, or can be used for carrying or storing in the form of an instruction or data structure. The desired program code and any other medium that can be accessed by the computer. Also. Any connection may suitably be a computer readable medium. For example, if the software is transmitted from a website, server, or other remote source using coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), or wireless technologies such as infrared, radio, and microwave, then the coaxial cable , fiber optic cable, twisted pair, DSL, or wireless technologies such as infrared, wireless, and microwave are included in the fixing of the associated media. As used in the present invention, a disk and a disc include a compact disc (CD), a laser disc, a compact disc, a digital versatile disc (DVD), a floppy disk, and a Blu-ray disc, wherein the disc is usually magnetically copied, and the disc is The laser is used to optically replicate the data. Combinations of the above should also be included within the scope of the computer readable media.

In summary, the above description is only a preferred embodiment of the technical solution of the present invention, and is not intended to limit the scope of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and scope of the present invention are intended to be included within the scope of the present invention.

Claims

A channel transfer based data transmission method, comprising:

Establishing or updating a channel binding table, where the entry of the channel binding table includes at least one or more service flow identifiers and one or more channel bonding groups, where the number of one or more service flow identifiers is displayed. Same as the number of the one or more channel bonding groups, the one or more service flow identifiers indicating one or more service flows, each of the one or more traffic flows respectively One-to-one correspondence between each channel binding group in one or more channel bonding groups, wherein each channel bonding group includes one or more bound channels;

Inserting a first service flow identifier in a data frame of the first service flow when performing the first service flow transmission in the one or more service flows;

Determining, according to the channel binding table and the first service flow identifier, a channel binding group of the first service flow, if the channel binding group of the first service flow includes more than one channel, Transmitting, in the data frame of the first service flow, a sending sequence number, where the sending sequence number is used by the receiving device to reassemble the data frame of the first service flow received by the receiving device;

And transmitting, by using a channel in the channel bonding group of the first service flow, a data frame of the first service flow.
The service stream transmission method according to claim 1, wherein

The data frame of the first service flow includes a length/type field and a frame sequence number field;

The length/type field is used to indicate whether a data sequence of the first service flow carries a transmission sequence number;

And if the length/type field indicates that the data frame of the first service flow carries a transmission sequence number, the frame sequence number field is used to indicate a value of the transmission sequence number.
The service stream transmission method according to claim 1 or 2, characterized in that

The data transmission method further includes:

When the receiving side device is an optical network unit ONU, sending a service configuration message, where the service configuration message instructs the ONU to establish or update a channel binding table of the ONU, so as to facilitate the ONU base. The traffic is transmitted in the channel binding.
The service stream transmission method according to claim 3, characterized in that

The service configuration message carries a second service flow identifier and a channel configuration indication;

The second service flow identifier is used to indicate a second service flow;

The channel configuration indication is used to indicate that a channel in the ONU joins or exits a channel bonding group of the second service flow.
A data transmission device based on channel binding, comprising:

An establishing and updating unit, configured to establish or update a channel binding table, where the table binding table entry includes at least one or more service flow identifiers and one or more channel binding groups, wherein one or more The number of service flow identifiers is the same as the number of the one or more channel bonding groups, the one or more service flow identifiers indicating one or more service flows, in the one or more service flows Each of the service flows is in one-to-one correspondence with each of the one or more channel bonding groups, wherein each channel bonding group includes one or more bound channels;

An insertion unit, configured to insert a first service flow identifier in a data frame of the first service flow when performing the first service flow transmission in the one or more service flows; according to the channel binding table and Determining, by the first service flow identifier, a channel binding group of the first service flow, if the number of channels included in the channel bonding group of the first service flow is greater than 1, in the first service flow Transmitting a transmission sequence number into the data frame, where the transmission sequence number is used by the receiving side device to reassemble the data frame of the first service flow received;

And a transmitting unit, configured to transmit, by using a channel in the channel bonding group of the first service flow, a data frame of the first service flow.
A service stream transmission apparatus according to claim 5, wherein

The data frame of the first service flow includes a length/type field and a frame sequence number field;

The length/type field is used to indicate whether a data sequence of the first service flow carries a transmission sequence number;

If the length/type field indicates that the data sequence of the first service flow carries a transmission sequence No., the frame sequence number field is used to indicate the value of the transmission sequence number.
A service stream transmission apparatus according to claim 5 or 6, wherein

The data transmission device further includes:

a sending unit, configured to: when the receiving side device is an optical network unit ONU, send a service configuration message, where the service configuration message instructs the ONU to establish or update a channel binding table of the ONU, so that the ONU is based on channel binding transmission business flow.
A service stream transmission apparatus according to claim 7, wherein

The service configuration message carries a second service flow identifier and a channel configuration indication;

The second service flow identifier is used to indicate a second service flow;

The channel configuration indication is used to indicate that a channel in the ONU joins or exits a channel bonding group of the second service flow.