Detailed Description
The following describes in detail how to implement simultaneous support of work modes such as EFM and IMA based on ports on a single-line pair high-speed subscriber present access multiplexing interface board, with reference to the accompanying drawings, and it should be understood that the present invention is not limited to the specific embodiments described above, and is also applicable to other types of data subscriber line access multiplexing devices.
Two access modes, namely M-Pair and binding, are introduced firstly: M-Pair is a physical layer concept, in the physical layer, a plurality of pairs (preferably 1 to 4 pairs) of physical links are aggregated to form a logical link, so that a longer physical link transmission distance can be obtained under the condition of ensuring a certain transmission rate; and when the transmission distance is constant, the transmission rate can be optimized. Unlike M-Pair, the Bonding approach is not implemented at the physical layer, but rather is implemented to aggregate logical links, which will be described in detail later. At present, the two access modes are very important functions in the SHDSL access,
fig. 1 is a block diagram of an access scheme in the present invention. The basic idea of the invention is to support simultaneous working modes like IMA and EFM based on ports on a data user line interface board. According to the user's requirement, the port is set into a mode (such as IMA) and corresponding to the user, then the port will work in IMA mode, until the user needs to change the mode, the port will be reset at the local side.
The management layer in fig. 1 is used to implement configuration management on a service plane; the data layer in fig. 1 is the main path of data, and at the same time, in-band management (i.e., management within the data layer) can be realized.
Fig. 2 is a schematic diagram of a technical solution for implementing multiple access modes on the same single-wire-to-high-speed data subscriber line access multiplexing interface board according to an embodiment of the present invention. Each SHDSL module corresponds to one SHDSL physical link and implements a corresponding physical layer function. The EFM module carries out EFM format conversion on the data of the SHDSL module. And the IMA module performs IMA format conversion on the data of the SHDSL module.
The binding function is divided into two cases: EFM and IMA, namely EFM Bonding and IMA Bonding.
Under the EFM condition, data passes through an EFM Bonding module, which performs EFM data format conversion on a SHDSL physical link, and the SHDSL physical link is converted into a logical link in the EFM format after passing through the data format conversion in the EFM format. Then, the EFM Bonding module implements Bonding function on multiple pairs (preferably 1 to 4 pairs) of the SHDSL logical links in EFM format, and aggregates the multiple pairs (preferably 1 to 4 pairs) of the SHDSL logical links in EFM format into one logical connection in EFM format;
in case of IMA, data is passed through an IMA binding module, which first performs IMA data format conversion on a SHDSL physical link, and the SHDSL physical link is converted into a logical link in an IMA format after passing through the data format conversion in the IMA format. Then, the IMA Bonding module implements Bonding function on multiple pairs (preferably 1 to 4 pairs) of SHDSL logical links in IMA format, and aggregates the multiple pairs (preferably 1 to 4 pairs) of SHDSL logical links in IMA format into one path of logical connection in IMA format.
Likewise, the M-Pair function is divided into two cases: EFM and IMA, i.e., EFMM-Pair and IMA M-Pair.
In the case of EFM, data will pass through an EFM-Pair module, which performs an M-Pair function on multiple pairs (preferably 1 to 4 pairs) of physical links at the physical layer, and aggregates them into one logical link, and then, performs EFM format data format conversion on the logical link;
in IMA case, the data will go through an IMA M-Pair module that performs M-Pair (preferably 1 to 4 pairs) of physical links at the physical layer, aggregates them into one logical link, and then performs IMA format data format conversion on the logical link.
After the above operations, six logical links, i.e., IMA, EFM, IMABonding, EFMBonding, IMA M-Pair, and EFM-Pair, exist simultaneously, and are respectively used for carrying data in two formats, i.e., IMA and EFM.
Converting EFM format data (carried by EFM, EFM Bonding, EFMM-Pair) into Ethernet unified format by an EFM interface module; the IMA format data (carried by IMA, IMA binding, IMA M-Pair) is converted to a unified format (e.g., ethernet format) by an IMA interface module. Preferably, a plurality of ethernet protocols, such as VLAN (virtual local area network), can again be implemented by the protocol station.
Fig. 3 is a flowchart of a method for implementing multiple access modes in the same dsl access multiplexing device and simultaneously supporting EFM, IMA, and other modes to operate on a single board according to an embodiment of the present invention.
In step S301, input data from a data user link is received.
In step S302, the port corresponding to the user is set to work in a certain mode according to the user requirement, and then, after the data arrives, the access device performs corresponding format conversion on the received data according to the preset working mode of the port, converts the input data into encapsulated data in an IMA or EFM format, and transfers the encapsulated data to an upper layer for further processing;
preferably, in step S302, after receiving data from the user end, if the access port corresponding to the user end is set to a binding working mode according to the needs of the user, the access device performs corresponding EMF or IMA data format conversion on data on each of a plurality of physical links belonging to the user, and then aggregates the EMF or IMA data on the plurality of format-converted logical links into data on a logical link of a corresponding format, and transfers the data to an upper layer for further processing;
preferably, in step S302, after receiving data from the user side, if the port corresponding to the user side is set to the M-Pair operating mode according to the requirement of the user, the access device aggregates data on a plurality of physical links belonging to the user into data on a logical link with a corresponding format, and further converts the data on the logical link with the corresponding format into an EFM or IMA format, and forwards the data to the upper layer for further processing.
After step 302, the data belongs to two formats, EFM and IMA, and then, in step 303, the access device converts the data in the EFM and IMA formats into output data in a unified format through the EFM interface function and the IMA interface function, respectively.
Fig. 4 is a block diagram of an access multiplexing device for implementing multiple data subscriber line access modes according to an embodiment of the present invention.
The receiving device 401 is configured to receive input data from a user side, set a port corresponding to the user to operate in a certain mode according to the user's requirement, and reset the port at the office side until the user needs to change the operating mode, so that the port operates in the mode required by the user;
the first conversion means 402 are adapted to convert the input data into data in a corresponding format (IMA or EFM) and to forward said data in a corresponding format to the second conversion means;
the second conversion device 403 is configured to convert the data processed by the first conversion device 402 into output data in a unified format, in an embodiment of the present invention, the unified format is an Ethernet format;
preferably, the access multiplexing device further includes:
an aggregation device 404, configured to aggregate data on multiple physical links into data on one logical link, where the data on the multiple physical links are transferred from the access device 401 to the aggregation device; and is
The first conversion device 402 is further configured to convert the data aggregated by the aggregation device 404 into a corresponding format, that is, when the working mode of the port corresponding to the user is EFM-Pair or IMA
M-Pair respectively corresponding to EFM and IMA formats, so that the first conversion device 402 converts the aggregated data into EFM or IMA format;
the aggregation device 404 is further configured to aggregate multiple paths of data in IMA or EFM format into one path of aggregated data in a corresponding format, where the multiple paths of data in IMA or EFM format are subjected to format conversion by the first conversion device 402; and is
The second conversion device 403 is further configured to convert the aggregated data in the corresponding format into output data in a unified format, such as ethernet format.
The technical solutions of the present invention have been described above with reference to specific embodiments. It is to be understood that the present invention is not limited to a particular system, device, and protocol, and that various changes or modifications may be made by one skilled in the art without departing from the scope of the appended claims.