CN112367330A - Method and system for compatibility of multiple data models on router/CPE (customer premises equipment) - Google Patents
Method and system for compatibility of multiple data models on router/CPE (customer premises equipment) Download PDFInfo
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Abstract
The invention discloses a method and a system for being compatible with various data models on a router/CPE, wherein an Adapter module is inserted between data model modules on an ACS and the CPE, and data communication between the data model modules on the ACS and the CPE is communicated through the Adapter module; an instruction issued by the ACS is translated into an instruction which can be identified by a data model through an Adapter module and then transmitted to a data model module; in the return direction, the response information returned by the data model module is translated into response information which can be identified by the ACS through the Adapter module; when the two data models on the ACS and the CPE are completely consistent, the Adapter module only conducts transparent transmission processing, and when the two data models on the ACS and the CPE are not consistent, the Adapter module conducts translation processing. The invention is particularly suitable for the CPE which has matured and stably realized a data model, and the support to various data models can be easily realized by introducing an independent Adapter module and other modules without modifying any code, thereby greatly reducing the workload of modification and improving the stability of the system.
Description
Technical Field
The invention relates to the field of communication, in particular to a method and a system for being compatible with multiple data models on a router/CPE.
Background
The Broadband Forum (Broadband Forum) organization sets out a series of technical standards, and determines the communication protocol between the CPE and the ACS, including TR069, TR098, TR181, etc. Due to the standardization of the protocol, CPE and ACS of different manufacturers can operate mutually, and the series of protocols are simple and flexible and are widely used. The broadband operator can easily carry out automatic configuration and service transmission, software and firmware version management, performance monitoring, fault detection and the like on the broadband access equipment CPE. Since the protocols are always perfected and upgraded, although the basic principles of the implementation are the same, the data models may be completely different, e.g. TR098 and TR181 are very different.
For the same broadband operator, only one data model is adopted for convenience, and some operators only use the TR098 and some operators only use the TR 181. However, for the CPE equipment manufacturer, the CPE equipment manufacturer may offer different operators, and if the data models used by the operators are different, the CPE equipment manufacturer may have to develop different data models for the different data models even if the required functions are the same. Since the operator performs all operations and maintenance on the CPE device through the data model, the CPE device manufacturer may develop a lot of data models as a center, and re-develop the data models once each new data model or customized extension of the data models occurs, which is a heavy development and maintenance burden for the CPE device manufacturer.
Here, TR098 and TR181 are taken as examples, TR098 and TR181 can both implement the same function, but the data model (data model) of the same function is represented in a different form, and in the past, the data model cannot coexist in the same system at all, and only one data model can be selected to implement.
Disclosure of Invention
The present invention is directed to overcoming the deficiencies of the prior art and providing a method and system for compatibility of multiple data models on a router/CPE, comprising the steps of:
an Adapter module is arranged between the ACS and the data model module on the CPE, and data communication between the ACS and the data model module on the CPE is communicated through the Adapter module; an instruction issued by the ACS is translated into an instruction which can be identified by a data model through an Adapter module and then transmitted to a data model module; in the return direction, the response information returned by the data model module is translated into response information which can be identified by the ACS through the Adapter module;
when the two data models on the ACS and the CPE are completely consistent, the Adapter module only conducts transparent transmission processing, and does not modify the content of the data models;
when the two data models on the ACS and the CPE are not consistent, the Adapter module carries out translation processing, and a mapping table is preset and comprises the full path of each node in the data model on the ACS and the rule of how to translate the data model mapped on the CPE.
Further, when the data models on the ACS and the CPE are not consistent, the Adapter module performs translation processing, and presets a mapping table, where the table includes a full path of each data model node and a rule how to translate and map the data model node, and specifically includes:
and only if the partial names of the paths are different, path mapping is carried out, and the Adapter module only needs to modify the path of the issued command of the ACS into the path of the data model on the corresponding CPE according to the mapping table. When response information is returned, modifying the path of the data model on the CPE into the path corresponding to the data model on the CPE according to the mapping table;
paths are different, enumeration values are also different, and each enumeration value of the data model on the ACS corresponds to one enumeration value of the data model on the CPE, so that not only path mapping but also value mapping is required;
the wireless bandwidth literal values in the data model on the ACS are mapped in the sending process, namely the wireless bandwidth literal values are respectively replaced by the corresponding values on the data model on the CPE, and the reverse replacement is carried out in the return response message;
mapping of multiple instances, represented in the path using { i }, each { i } representing where there are multiple instances, i representing a natural number, starting from 1; in the mapping process, if the number of the { i } of the two data models is equal, the instance numbers { i } correspond to each other from left to right one by one, if the number of the instance numbers { i } is not equal, balance processing is carried out, the excessive { i } is carried out with complement {1} processing, and right alignment is carried out, namely the excessive { i } on the left side is replaced by 1;
specific node names and values can be found according to fixed rules in the data model, and corresponding nodes meeting requirements can be found only by inquiring on a plurality of paths for a plurality of times, so that the corresponding nodes can be found by configuring the inquiry rules in advance.
The invention has the beneficial effects that: the invention can add a 'translation' module under the condition that one data model is developed and completed, and maps one data model to another data model, thus realizing that two or more data models can be simultaneously supported in the same CPE, configuring the type of the currently used data model according to the requirement and being capable of dynamically adjusting.
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FIG. 1 is a schematic diagram of a method and system for compatibility of multiple data models on a router/CPE.
Detailed Description
The technical solutions of the present invention are further described in detail below with reference to the accompanying drawings, but the scope of the present invention is not limited to the following.
As shown in fig. 1, a method and system for compatibility of multiple data models on a router/CPE includes the following processes:
an Adapter module is arranged between the ACS and the data model module on the CPE, and data communication between the ACS and the data model module on the CPE is communicated through the Adapter module; an instruction issued by the ACS is translated into an instruction which can be identified by a data model through an Adapter module and then transmitted to a data model module; in the return direction, the response information returned by the data model module is translated into response information which can be identified by the ACS through the Adapter module;
when the two data models on the ACS and the CPE are completely consistent, the Adapter module only conducts transparent transmission processing, and does not modify the content of the data models;
when the two data models on the ACS and the CPE are not consistent, the Adapter module carries out translation processing, and a mapping table is preset and comprises the full path of each node in the data model on the ACS and the rule of how to translate the data model mapped on the CPE.
When the data models on the ACS and the CPE are not consistent, the Adapter module performs translation processing, and presets a mapping table, where the table includes a full path of each data model node and a rule how to translate and map the data model node to the data model table, and specifically includes:
and only if the partial names of the paths are different, path mapping is carried out, and the Adapter module only needs to modify the path of the issued command of the ACS into the path of the data model on the corresponding CPE according to the mapping table. And when the response information is returned, modifying the path of the data model on the CPE into the path corresponding to the data model on the CPE according to the mapping table.
When the two data models on the ACS and the CPE are not consistent, the Adapter module performs translation processing, and presets a mapping table, where the table includes a full path of each data model node and a rule how to translate and map the data model table, and specifically includes:
the paths are different and the enumerated values are also different, each enumerated value of the data model on the ACS corresponds to one enumerated value of the data model on the CPE, not only path mapping but also value mapping is needed, and the value mapping is that
The wireless bandwidth literal values in the data model on the ACS are mapped in the sending process, namely, the wireless bandwidth literal values are respectively replaced by the corresponding values on the data model on the CPE, and the reverse replacement is carried out in the return response message.
When the data models on the ACS and the CPE are not consistent, the Adapter module performs translation processing, and presets a mapping table, where the table includes a full path of each data model node and a rule how to translate and map the data model node to the data model table, and specifically includes:
mapping of multiple instances, represented in the path using { i }, each { i } representing where there are multiple instances, i representing a natural number, starting from 1; in the mapping process, if the number of the { i } of the two data models is equal, the instance numbers { i } correspond to each other one by one from left to right, if the number of the instance numbers { i } is not equal, balance processing is carried out, the excessive { i } is carried out with complement {1} processing, and right alignment is carried out, namely the excessive { i } on the left side is replaced by 1.
When the data models on the ACS and the CPE are not consistent, the Adapter module performs translation processing, and presets a mapping table, where the table includes a full path of each data model node and a rule how to translate and map the data model node to the data model table, and specifically includes:
specific node names and values can be found according to fixed rules in the data model, and corresponding nodes meeting requirements can be found only by inquiring on a plurality of paths for a plurality of times, so that the corresponding nodes can be found by configuring the inquiry rules in advance.
Specifically, the present invention can support switching among a plurality of data models, and as a preferred example, to simplify the requirement of description, the CPE first implements the TR181 data model, and how to make it simultaneously support the data model of TR098 without modifying the source codes of other modules. In practical application, TR181 and TR098 may be implemented as other data models, and the principle is the same, and will not be specifically described later.
(1) It is assumed that there is a TR181 module in the original system, which meets the requirements of the TR181 data model (which is only an example, and may be other data models as well), is responsible for communicating with an ACS (Auto-Configuration Server), issuing the instructions of the ACS to other modules, and returning response information to the ACS. In the invention, an Adapter module is newly added and is positioned between the ACS and the TR181 module, the ACS directly communicates with the TR181 module before, and the interaction between the ACS and the TR181 module needs to pass through the Adapter module.
(2) The instructions sent by the ACS are translated into the instructions which can be identified by the TR181 module through the Adapter module, and then are transmitted to the TR181 module. In the return direction, the response information returned by the TR181 module is translated into response information which can be recognized by the ACS through the Adapter module. The advantage of adding the Adapter module is that neither the ACS side nor the TR181 module (and other functional modules) needs to be modified, and any modification is only carried out on the Adapter module itself, so that the system maintenance and development are facilitated, and the disturbance to the mature and stable functional modules is reduced to the maximum extent.
(3) The Adapter module can be configured to "translate" the data model between the ACS and the CPE, and to translate which data model to which data model, and when the data models on the ACS and the CPE are completely consistent, the Adapter module only performs transparent transmission processing without any modification to the contents of the data model. When the data models on the ACS and the CPE are not consistent, the Adapter module needs to perform "translation" processing, which is described by taking the TR098 data model running on the ACS and the TR181 running on the CPE as an example. The principle of operating other data models is the same, and the description is omitted.
(4) Since the data models of TR098 and TR181 are very different, the root node path TR098 starts with internet gateway device and TR181 starts with device. The path, name, value and meaning of a node do not exist between TR098 and TR181, but all the nodes with similar functions can be found in the data model of TR181 by each TR098 node, the two nodes with similar functions are connected, and the name and value of the node are literally translated in the path, so that the requirement of supporting various data models can be met. They are described in the following sequence, from easy to difficult, according to the degree of difference and the degree of difficulty of "translation".
(5) A mapping table is preset which lists the full path of each TR098 node and how to translate the rules mapped to the TR181 data model table. If a certain node cannot be found in the table, the implementation of the node is not supported, in actual application, all the TR098 is not needed, and all the nodes to be implemented need to be listed in the table.
(6) For the simplest case, only part of the path names are different, and the rest is identical. For example:
internet gateway device.manfacturer in TR098, device.manfacturer in TR 181.
In this case, the Adapter module only needs to modify the path internet gateway device.manfacturer of TR098 into device.manfacturer when the ACS issues a command (hereinafter referred to as "downstream"). When response information is returned (hereinafter referred to as uplink), the device. The case described in (6) here is classified as case (a).
(7) In a slightly more complicated case than the case (a), not only the paths but also the enumerated values are different, and in this case, not only the path mapping (case a) but also the value mapping are performed
For example, the operator defines the literal values of the wireless bandwidth 0,1,2,3, and 4 in the TR098 data model to represent the 20MHz,40MHz,80MHz, and 160MHz, respectively, and Auto, which exactly match the literal values of the data model in the TR181 model.
These numbers are mapped in the sending process by replacing the values 0,1,2,3,4 with 20MHz,40MHz,80MHz,160MHz, Auto, respectively, and vice versa in the return response message.
The case described in (7) here is referred to as case (B)
(8) A little more complicated case than case (B), the value of case (B) is an enumerated value that can be fully enumerated, and each enumerated value of TR098 corresponds to one enumerated value in TR 181. The case of (8) here is also a perfect one-to-one correspondence,
however, the enumerated values are too numerous or cannot be completely enumerated, but the correspondence can be formulated.
For example, the unit of the model value of wifi transmission power of a certain operator in the TR098 data model is milliwatt (mw), and the unit of the transmission power described by another operator in the TR181 is dBm, the Adapter module only needs to convert according to the conversion formula of mw and dBm. The formula for conversion of arbitrary power P (mW) to xdBm is as follows:
xdBw＝10log(P/1W)
and
p ═ 10(x/10) (1mW), where (x/10) is the index in the formula
The first formula is used for downlink and the second formula is used for uplink. Specifically, for example, the transmission power of wifi at a node in TR098 is 100mw, and 20dBm needs to be translated into a value descending to TR 181. The reverse translation is also made according to the formula in the upper row.
The case referred to here as (8) is referred to as case (C)
(9) Mapping of multiple instances, in case of multiple instances in both TR098 and TR181, { i } is used in the path
Indicating, for example, in TR098, that there are WAN connected node paths as follows:
internet gateway device. wan device. { i }. wan connection }, each { i } indicates where multiple instances (at least one) exist, i represents a natural number, starting at 1.
In the mapping process, if the number of the { i } of the two data models is equal, the instance numbers { i } correspond to each other one by one from left to right, if the number of the instance numbers { i } is not equal, balancing processing is needed, the excessive { i } is compensated by {1}, and the right side is aligned, namely the excessive { i } on the left side is replaced by 1.
For example, the path of the data pattern for a certain node TR098 is a. { i }. B. { i }. C. { i }. D, and the path of the data pattern for another TR181 is M. { i }. N. { i }. O. { i }. P (each capital letter herein represents a path variable, representing an arbitrary path value). For a certain determined instance:
a.1.B.2.C.3.D directly makes instance number { i } and makes replacement according to correspondent position, and the replacement result is M.1.N.2.O.3.P
An example of a case when the number of instances of one data model is more than the number of instances of the other is as follows:
one data model is a. The processing method is to take the small number as a reference and align the right, and normalize the excessive { i }, i.e. the processing is 1, for example:
m.2.n.3.o, the path corresponding to the other data pattern should be a.1.b.2.c.3.d, and a. { i }. B. { i }. C. { i }. D, on the right-hand alignment principle, the first { i } has no corresponding instance number and is treated as 1, because the number 1 is the simplest and is the starting value for the instance number to grow.
If the data model with the larger number of instances i is internal to the CPE, then the more instances of i need to be created first.
For example, in this example, a. { i }. B. { i }. C. { i }. D, a.1. needs to be created first, and the following B. { i }. C. { i }. D does not need to be created in advance because it completely corresponds to two { i } s of M. { i }. N. { i }. O.
Here the mapping method of the multiple instances is summarized as the case (D)
(10) Some nodes of some data models of TR098 may not be exactly on a certain node path of TR181, and specific node names and values need to be found according to certain rules, and corresponding nodes meeting requirements may be queried on multiple paths by multiple queries. For a certain node, the query rule is fixed, the query rule is configured in advance,
and in conjunction with the methods described in cases (a), (B), (C), (D), the corresponding node can be found.
This method is summarized as the case (E)
(11) The cases (a), (B), (C), (D) and (E) described above already cover most cases, and there are still some cases that cannot be mapped by the method described above, and this time, expansion needs to be performed in the standard data model to add a customized node. For example, a standard or operator-defined node supported by the ACS cannot find the corresponding node in the data model on the CPE, but only the nodes in the data model on the CPE need to be expanded, and then the data model is updated according to the conditions (A), (B), (C), (D), (E)
The described method performs mapping into extended nodes. This method is called case (F)
According to the requirement, the Adapter module can realize the complete mapping of the two data models by using any one of the conditions (A), (B), (C), (D), (E) and (F). And without modifying any code of other modules
The foregoing is illustrative of the preferred embodiments of this invention, and it is to be understood that the invention is not limited to the precise form disclosed herein and that various other combinations, modifications, and environments may be resorted to, falling within the scope of the concept as disclosed herein, either as described above or as apparent to those skilled in the relevant art. And that modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (2)
1. A method and system for compatibility of multiple data models on a router/CPE, comprising the steps of:
an Adapter module is arranged between the ACS and the data model module on the CPE, and data communication between the ACS and the data model module on the CPE is communicated through the Adapter module; an instruction issued by the ACS is translated into an instruction which can be identified by a data model through an Adapter module and then transmitted to a data model module; in the return direction, the response information returned by the data model module is translated into response information which can be identified by the ACS through the Adapter module;
when the two data models on the ACS and the CPE are completely consistent, the Adapter module only conducts transparent transmission processing, and does not modify the content of the data models;
when the two data models on the ACS and the CPE are not consistent, the Adapter module carries out translation processing, and a mapping table is preset and comprises the full path of each node in the data model on the ACS and the rule of how to translate the data model mapped on the CPE.
2. The method and system according to claim 1, wherein when the data models in the ACS and the CPE are not consistent, the Adapter module performs a translation process, and a mapping table is preset, the table includes a full path of each data model node, and a rule for how to translate the data model table, and specifically includes:
only if the partial names of the paths are different, path mapping is carried out, and the Adapter module only needs to modify the path of the issued command of the ACS into the path of the data model on the corresponding CPE according to the mapping table; when response information is returned, modifying the path of the data model on the CPE into the path corresponding to the data model on the CPE according to the mapping table;
paths are different, enumeration values are also different, and each enumeration value of the data model on the ACS corresponds to one enumeration value in the data model on the CPE, so that not only path mapping but also value mapping is required;
the wireless bandwidth literal values in the data model on the ACS are mapped in the issuing process, namely the wireless bandwidth literal values are respectively replaced by the corresponding values on the data model on the CPE, and the reverse replacement is carried out in the return response message;
mapping of multiple instances, using { i } representations in the path, each { i } representation where there are multiple instances, i representing a natural number, starting from 1; in the mapping process, if the number of the { i } of the two data models is equal, the instance numbers { i } correspond to each other from left to right one by one, if the number of the instance numbers { i } is not equal, balance processing is carried out, the excessive { i } is carried out with {1} complementing processing, and right alignment is carried out, namely the excessive { i } on the left side is replaced by 1;
specific node names and values can be found according to fixed rules in the data model, and corresponding nodes meeting requirements can be found only by inquiring on a plurality of paths for a plurality of times, and then the inquiry rules are configured in advance to find the corresponding nodes.
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