CN102035816A - Method and device for converting traffic message channel (TMC) message into transport protocol experts group (TPEG) message - Google Patents
Method and device for converting traffic message channel (TMC) message into transport protocol experts group (TPEG) message Download PDFInfo
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Abstract
The invention provides a method and device for converting a traffic message channel (TMC) message into a transport protocol experts group (TPEG) message. The method comprises the following steps: converting the TMC message in a TMC message group into a traffic event protocol message, and encapsulating the traffic event protocol message into a traffic event protocol module; acquiring the service module message of the traffic event protocol module; adding the service module message and preset service message to a service and network message module; and encapsulating the traffic event protocol module and the service and network message module into the TPEG message. The invention also provides the device for realizing the method. By adopting the technical scheme provided by the invention, the real-time traffic message carried by the TMC message can be fully encapsulated into the TPEG message, thereby realizing seamless transition from description of the real-time traffic message by the TMC to description the real-time traffic message by the TPEG, avoiding a quality evaluating process, and greatly reducing the development cost of the TPEG.
Description
Technical field
The present invention relates to the intelligent transport technology field, method and device that to relate in particular to a kind of TMC message conversion be TPEG message.
Background technology
(Traffic Message Channel TMC) is a kind of digital encoding system to Traffic Message Channel, the Real-time Traffic Information in certain zone, Weather information etc. can be organized into TMC message by TMC.At present, extensively (Radio Data System RDS) combines and constitutes the RDS-TMC system, utilizes RDS technology issue TMC message to user side, and services such as transport information, Weather information are provided for the public with TMC and Radio Data System in Europe.
Serious day by day urban highway traffic pressure has been alleviated in the extensive use of RDS-TMC system to a great extent, but there are some limitation in TMC, and is little such as amount of information, and transmission rate is low etc.Consider the limitation of TMC, (the European Broadcasting Union of European Broadcasting Union, EBU) formulated a kind of transport protocol expert group (Transport Protocol Experts Group, TPEG) agreement, no matter be Real-time Traffic Information, public trip information, or weather conditions etc. all belong within the TPEG agreement category.TPEG message is with respect to the advantage of TMC message: contain much information, content covers more comprehensively, more detailed; Can see through various digital medias (such as the Internet, digital broadcasting, Digital Television etc.) transmission and transmission rate height.Therefore, along with the raising of people to the Real-time Traffic Information quality of service requirement, TPEG substitutes TMC the most at last.
At present, the existing traffic-information service provider of China adopts TMC message issue Real-time Traffic Information, prior art is studied with practice process in, the inventor finds for the traffic information service providers that adopts TMC message issue Real-time Traffic Information, in the period of TMC to the TPEG transition, the brand-new TPEG system of exploitation one cover need expend a large amount of quality assessment resources, and development cost is too high.Therefore, need and propose a kind of TMC message conversion the technology that is TPEG message badly, this technology can make full use of existing TMC Real-time Traffic Information service system resource, realize adopting TMC to describe Real-time Traffic Information to adopting TPEG to describe the seamless transitions of Real-time Traffic Information, avoid the quality assessment process, reduce development cost.
Summary of the invention
Method and device that it is TPEG message that the technical problem that the embodiment of the invention will solve provides a kind of TMC message conversion, realized adopting TMC to describe Real-time Traffic Information to adopting TPEG to describe the seamless transitions of Real-time Traffic Information, avoid the quality assessment process, reduced development cost.
For solving the problems of the technologies described above, the objective of the invention is to be achieved through the following technical solutions:
It is the method for transport protocol expert group message that the embodiment of the invention provides a kind of Traffic Message Channel message conversion, and described method comprises:
With the TMC message conversion in the TMC message groups is TEC message, and TEC message is encapsulated as the TEC assembly;
Obtain the serviced component information of TEC assembly;
Described serviced component information and the information on services that presets are added into SNI assembly;
With described TEC assembly and SM component package is TPEG message.
It is the device of transport protocol expert group message that the embodiment of the invention also provides a kind of Traffic Message Channel message conversion, and described device comprises:
TEC message acquiring unit, the TMC message conversion that is used for the TMC message groups is a TEC message;
TEC component package unit is used for TEC message is encapsulated as the TEC assembly;
SNI component package unit is used to obtain the serviced component information of TEC assembly, and described serviced component information and the information on services that presets are added into SNI assembly;
TPEG message encapsulation unit, being used for described TEC assembly and SNI component package is TPEG message.
Technique scheme has following beneficial effect:
More than the TMC message conversion that provides for the invention process example be the technical scheme of TPEG message, this scheme is with the data source of TMC message as TEPG message, be TEC message with the TMC message conversion in the TMC message groups earlier, TEC message is encapsulated as the TEC assembly, and serviced component information in the TEC assembly and the information on services that presets added into SNI assembly, obtain TPEG message by encapsulation TEC assembly and SNI assembly.The technical scheme that adopts the embodiment of the invention to provide, the Real-time Traffic Information that TMC message can be carried all encapsulation advances TPEG message, information dropout can not appear, realized adopting TMC to describe Real-time Traffic Information to adopting TPEG to describe the seamless transitions of Real-time Traffic Information, avoid the quality assessment process, greatly reduced the TPEG development cost.
Description of drawings
The TMC message conversion that Fig. 1 provides for the embodiment of the invention is the method flow diagram of TPEG message;
The TMC message conversion that Fig. 2 provides for the embodiment of the invention is the method flow diagram of TEC message;
The TEC message that Fig. 3 provides for one embodiment of the invention is encapsulated as the method flow diagram of TEC assembly;
The TEC message that Fig. 4 provides for another embodiment of the present invention is encapsulated as the method flow diagram of TEC assembly;
The TMC message conversion that Fig. 5 provides for the embodiment of the invention is that the device of TPEG message is formed schematic diagram.
Embodiment
For the purpose that makes the embodiment of the invention, technical scheme, and advantage clearer, below the technical scheme that the embodiment of the invention provides is elaborated with reference to accompanying drawing.
See also Fig. 1, the TMC message conversion that provides for the embodiment of the invention is the method flow diagram of TPEG message, and this method comprises:
Step 101: with the TMC message conversion in the TMC message groups is traffic events agreement (TrafficEvent Compact, TEC) message;
Step 102: the TEC message that step 101 is converted to is encapsulated as the TEC assembly;
Step 103: the serviced component information of obtaining the TEC assembly;
Step 104: serviced component information and the information on services that presets are encapsulated into service and the network information (Service and Network Information, SNI) assembly;
In embodiments of the present invention, described serviced component information comprises: the serviced component ID (SCID) of each TEC assembly, content ID (COID) and application ID (AID, AID is defined by the TPEG specification, the AID=0005 of TEC for example), wherein, SCID need extract from the serviced component framework head of TEC assembly; AID is default fixed value 0005; COID is used for a plurality of TEC assemblies that same TPEG message encapsulates, and the COID of each TEC is distributed by the SNI processing module; The information on services that presets comprises: service provider's title, service describing etc. are constant.
Step 105: with SNI assembly and TEC component package is TPEG message.
More than the TMC message conversion that provides for the invention process example be the method for TPEG message, this method adopts the data source of TMC message as TEPG message, make full use of the resource of existing TMC Real-time Traffic Information service system, avoided the quality assessment process, greatly reduced the TPEG development cost.
More than the TMC message conversion that provides for the embodiment of the invention be the method for TPEG message, adopt the specific implementation process of technological means to be described in detail below in conjunction with accompanying drawing to said method.
See also Fig. 2, the TMC message conversion that provides for the embodiment of the invention is the method flow diagram of TEC message, and this method comprises:
Step 201: from the TMC message groups, read a TMC message;
In actual applications, the TMC message groups can provide with text (.txt) form, and the delegation of text is recorded as a TMC message, and each property value of a TMC message separates with comma, and table 1 is the attribute list of TMC message.
The attribute list of table 1TMC message
Step 202: from the TMC message that step 201 reads, extract the TMC event code;
Step 203: in the TMC-TEC incident mapping table that presets, search the record whether described TMC event code correspondence is arranged,, then enter step 204,, then enter step 209 if do not have if having;
See also table 2, the part of the TMC-TEC incident mapping table that provides for the embodiment of the invention for example.
Table 2TMC-TEC incident mapping table
In actual applications, the incident of TMC-TEC shown in the table 2 mapping table can be designed to the xml configuration file, and its form is as follows:
＜Relation=" TMC-TEC incident mapping table "
＜Record evCode=" 136 " event=" block up " effect=" 1 " cause=" 1 " warnLev=" 1 " subCause=" 0 "
</Record>
＜Record evCode=" 115 " event=" jogging " effect=" 4 " cause=" 0 " warnLev=" 0 " subCause=" 0 "
</Record>
……
</Relation>
Wherein, evCode represents the TMC event code; Event represents the TMC event description; Effect represents the TEC events affecting sign indicating number of this TMC incident correspondence; Cause represents the TEC incident main cause sign indicating number of this TMC incident correspondence; WarnLev represents the TEC event alert grade of this TMC incident correspondence; SubCause represents the detailed reason code of TEC incident of this TMC incident correspondence.
Step 204: judge whether the TEC events affecting sign indicating number in the TMC event code corresponding record is zero, if, then enter step 209, if not, then enter step 205;
Execution in step 204 is for fear of invalid TEC message occurring, in actual applications, also can not influencing the realization of the embodiment of the invention in the direct execution in step 205 in step 203 back.
By the incident of TMC-TEC shown in the table 2 mapping table as can be known, when the TEC events affecting sign indicating number of TMC event code correspondence was zero, other yards value of TEC incident also was zero, can think that the TMC incident does not have corresponding TEC incident, does not change this TMC message.
Step 205:, make up the TEC event container according to the TEC event attribute value in the TMC event code corresponding record;
The TEC event container sees also table 3, makes up the TEC event container and comprises: according to the TEC event attribute value in the TMC event code corresponding record, be the respective attributes field assignment in the TEC event container; The computation module length value, and, be the length component field assignment in the TEC event container according to the value that calculates.
Illustrate according to TEC event attribute value, be the respective attributes field assignment procedure in the TEC event container.Such as, the TMC event code is 136, and the 2 TEC events affecting code values that can get TMC event code 136 correspondences of tabling look-up are 1, and the reason code value is 1, the alert level value is 1, in detail cause value is 0, then influences sign indicating number, reason code in the TEC event container after the assignment, the value of alert level and detailed reason is 1,1,1,0.。
Step 206: according to the positional information of extracting the TMC message that reads from step 201, structure TEC reference by location container (Location Referencing Container, LRC), described positional information comprises home position, direction and the scope of TMC message;
LRC, see also table 3, fields such as the assembly ID of LRC and risk distance adopt preset value or default value, make up the similar process of process and the described structure of the preamble TEC event container of LRC, first according to the positional information of from TMC message, extracting, to the position ID of LRC, direction and scope assignment, calculating the length component value of LRC again, is the length component field assignment of LRC according to calculated value.
Step 207: be TEC distribution of messages message id and revision ID,, make up the TEC management container according to described message id and revision ID;
Notice that the message id of each TEC message and revision ID are unique and do not repeat in a period of time.
Step 208: according to the TEC event container, TEC LRC and TEC management container make up a TEC message;
Step 209: judge the TMC message that whether does not read in addition in the described TMC message groups,, then return step 201,, then finish this flow process if do not have if having.
More than what provide for the embodiment of the invention is the method for TEC message with the TMC message conversion, after by said method the TMC message transformation being TEC message, need further TEC message to be encapsulated as the TEC assembly, in actual applications, can adopt following dual mode that TEC message is encapsulated as the TEC assembly:
First kind of mode, a TMC message conversion in the TMC message groups is a TEC message after, carry out the TEC component package one time, if adopt this kind mode, then after step 208, be introduced into and shown in Figure 3 TEC message be encapsulated as the flow process of TEC assembly, enter step 209 again;
The second way, TMC message all in the TMC message groups all is converted to TEC message after, carry out the TEC component package again, if adopt this kind mode, then in the direct execution in step 209 in step 208 back, TMC message all in the TMC message groups all are converted to TEC message, enter the flow process that TEC message is encapsulated as the TEC assembly shown in Figure 4 again.
Referring to table 3 is TEC assembly form shfft, and a TEC assembly can take the data space of 65535 bytes at most, takies byte number at the TEC assembly and does not exceed under 65535 the prerequisite, and a TEC assembly can encapsulate many TEC message.Wherein, the SCID of TEC assembly is provided with voluntarily by the service provider, the method that SCID is set that the embodiment of the invention provides is: the static variable that a SCID is set in the SNI processing module, when creating a TEC assembly, a SCID carries out the field assignment to the request of SNI module, and the SCID static variable in the SNI module adds 1. automatically
Table 3TEC assembly form shfft
See also Fig. 3, the TEC message that provides for one embodiment of the invention is encapsulated as the method flow diagram of TEC assembly, and this method comprises:
Step 301: whether the TEC message that determining step 208 obtains is article one TEC message, if, then enter step 302, if not, step 303 then entered;
Step 302: create a TEC assembly, described TEC message is added in the described TEC assembly, enter step 209 shown in Figure 2;
Step 303: judge whether existing TEC assembly can hold described TEC message, if can, then enter step 304, if can not, step 305 then entered;
Step 304: described TEC message is added in the described existing TEC assembly, and revise TEC message number in the described existing TEC assembly, enter step 209 shown in Figure 2;
Step 305: calculate the module data length value of described TEC assembly, add described module data length value and CRC check data to described TEC assembly, enter step 302.
See also Fig. 4, the TEC message that provides for another embodiment of the present invention is encapsulated as the method flow diagram of TEC assembly, and this method comprises:
Step 401: judge whether a TEC assembly can hold all TEC message, if can, then enter step 402, if can not, step 403 then entered;
Step 402: create a TEC assembly, all TEC message are added in the described TEC assembly, finish this flow process;
Step 403: create a plurality of (at least two) TEC assembly, all TEC message are added to respectively in described a plurality of TEC assembly;
Wherein, the TEC number of components can calculate in real time according to data total amount and data volume that the TEC assembly can take of all TEC message, also can be set at fixed value, does not all influence the realization of the embodiment of the invention.
More than the TEC message that provides for the embodiment of the invention be encapsulated as the method for TEC assembly, introduce the SNI assembly that the embodiment of the invention provides below in conjunction with table 4.As shown in Table 4, the SNI assembly mainly comprises two parts: information on services and quick tuning service table guide (Fast Tuning-Guide to theService Table, FT-GST), in actual applications, the information on services that sets in advance is encapsulated into the service name field and the service description field of SNI assembly, and SCID, COID, the AID of each TEC assembly encapsulated into FT-GST together.
Table 4SNI assembly form shfft
More than be the SNI assembly form of embodiment of the invention employing, the TPEG message that provides below in conjunction with the table 5 pair embodiment of the invention is described in detail.As shown in Table 5, TPEG message mainly comprises transport layer header and service framework, and mainly comprises in the service framework: service identifiers and integrated service assembly, wherein, SNI assembly and TEC assembly advance in the integrated service assembly packed.
Table 5TPEG transport frame
More than the TMC message conversion that provides for the embodiment of the invention be the method for TPEG message, the TMC message conversion that the embodiment of the invention is provided below in conjunction with accompanying drawing is that the device of TPEG message describes in detail.
See also Fig. 5, the TMC message conversion that provides for the embodiment of the invention is the device of TPEG message, and this device comprises:
TEC message acquiring unit 501, the TMC message conversion that is used for the TMC message groups is a TEC message;
TEC component package unit 502 is used for TEC message is encapsulated as the TEC assembly;
SNI component package unit 503 is used to obtain the serviced component information of TEC assembly, and described serviced component information and the information on services that presets are added into SNI assembly;
TPEG message encapsulation unit 504, being used for described TEC assembly and SNI component package is TPEG message.
More than the TMC message conversion that provides for the embodiment of the invention be the device of TPEG message, in actual applications, described TEC message acquiring unit 501 specifically comprises:
TMC message reading unit is used for the message groups from TMC, reads a TMC message;
The event code reading unit is used for extracting the TMC event code from the described TMC message that reads out;
TEC incident acquiring unit is used for searching the record whether described TMC event code correspondence is arranged at the TMC-TEC incident mapping table that presets, if having, then according to the TEC event attribute value in the described TMC event code corresponding record, makes up the TEC event container;
Reference by location container construction unit is used for making up the reference by location container of TEC according to from TMC message extract location information;
The management container construction unit is used to the TEC distribution of messages message identifier and the version identifier of described TMC message correspondence, according to described message id and revision ID, makes up the management container of TEC message;
TEC message encapsulation unit is used for the event container according to TEC, and TEC reference by location container and TEC management container make up a TEC message.
In actual applications, can adopt following dual mode that TEC message is encapsulated as the TEC assembly:
First kind of mode, a TMC message conversion in the TMC message groups is a TEC message after, carry out the TEC component package one time, at this moment, TEC component package unit 502 specifically comprises:
The message sequence judging unit is used for judging whether described TEC message is article one TEC message that described TMC message groups is converted to, if, then trigger TEC building component unit, if not, then trigger TEC assembly capacity judging unit;
Described TEC assembly capacity judging unit is used to judge that can existing TEC assembly hold described TEC message, if can, then trigger TEC module information adding device, if can not, TEC building component unit then triggered;
Described TEC module information adding device is used for adding described TEC message to described existing TEC assembly;
Described TEC building component unit is used to create a new TEC assembly, and described TEC message is added in the described new TEC assembly.
Second kind, after TMC message all in the TMC message groups all is converted to TEC message, carry out the TEC component package again, direct execution in step 209 in execution of step 208 back then, TMC message all in the TMC message groups all are converted to TEC message, at this moment, TEC component package unit 502 specifically comprises:
Assembly capacity judging unit is used for judging whether a TEC assembly can hold all TEC message that are converted to from the TMC message groups, if can, then trigger a TEC building component unit, if can not, the 2nd TEC building component unit then triggered;
A described TEC building component unit is used to create a TEC assembly, and described all TEC message are added in the TEC assembly;
Described the 2nd TEC building component unit is used for creating at least two TEC assemblies, and described all TEC message are added in the corresponding TEC assembly.
The TMC message conversion that adopts the embodiment of the invention to provide is that the technical scheme of TPEG message also has following beneficial effect:
The first, owing to adopt TMC message as data source, the TMC incident is corresponded to the TEC incident, use TMC Location location reference method, make full use of existing TMC real-time traffic information distribution system, greatly reduced the resource consolidation cost, and owing to have consistency with TMC message, can be by the quality management system of existing TMC, according to directly obtaining the mass parameter of TPEG message with the contrast of TMC message, avoided the quality assessment process, reduced development cost;
The second, because the content of TPEG message issue is identical with the content of former TMC message issue, therefore, only need increase a TPEG decoder in client, with the TPEG content decoding is the content identical with TMC message, the subsequent client processing procedure is consistent with the processing procedure of existing TMC message, therefore, reduced the upgrade cost of client.
More than be TPEG message to a kind of TMC message conversion provided by the present invention method and device are described in detail, for one of ordinary skill in the art, thought according to the embodiment of the invention, part in specific embodiments and applications all can change, in sum, this description should not be construed as limitation of the present invention.
Claims (9)
1. the method that the Traffic Message Channel message conversion is a transport protocol expert group message is characterized in that, described method comprises:
With the TMC message conversion in the TMC message groups is TEC message, and TEC message is encapsulated as the TEC assembly;
Obtain the serviced component information of TEC assembly;
Described serviced component information and the information on services that presets are added into SNI assembly;
With described TEC assembly and SNI component package is TPEG message.
2. the method for claim 1 is characterized in that, is that TEC message specifically comprises with the TMC message conversion in the TMC message groups:
From the TMC message groups, read a TMC message;
From the described TMC message that reads out, extract the TMC event code;
In the TMC-TEC incident mapping table that presets, search the record whether described TMC event code correspondence is arranged, if having,, make up the TEC event container then according to the TEC event attribute value in the described TMC event code corresponding record;
According to the positional information of from TMC message, extracting, make up TEC reference by location container;
For the TEC distribution of messages message identifier and the version identifier of described TMC message correspondence,, make up the management container of TEC message according to described message id and revision ID;
According to the TEC event container, TEC reference by location container and TEC management container make up a TEC message.
3. method as claimed in claim 2 is characterized in that, described method further comprises before making up the TEC event container:
Judge whether the TEC events affecting sign indicating number in the described TMC event code corresponding record is zero, if non-vanishing, then makes up the TEC event container, otherwise, described TMC message abandoned.
4. as claim 1 or 2 or 3 described methods, it is characterized in that, describedly TEC message is encapsulated as the TEC assembly specifically comprises:
Judge whether described TEC message is article one TEC message that is converted in the described TMC message groups, if, then create a TEC assembly, and described TEC message is added in the described TEC assembly, if not, judge that then can existing TEC assembly hold described TEC message, if can, then described TEC message is added in the described existing TEC assembly, if can not, then create a new TEC assembly, described TEC message is added in the described new TEC assembly.
5. as claim 1 or 2 or 3 described methods, it is characterized in that, TEC message be encapsulated as the TEC assembly specifically comprise:
Judge whether a TEC assembly can hold all TEC message that are converted to from the TMC message groups, if can, then create a TEC assembly, described all TEC message are added in the TEC assembly, if can not, then create at least two TEC assemblies, described all TEC message are added in the corresponding TEC assembly.
6. the device that the Traffic Message Channel message conversion is a transport protocol expert group message is characterized in that, described device comprises:
TEC message acquiring unit, the TMC message conversion that is used for the TMC message groups is a TEC message;
TEC component package unit is used for TEC message is encapsulated as the TEC assembly;
SNI component package unit is used to obtain the serviced component information of TEC assembly, and described serviced component information and the information on services that presets are added into SNI assembly;
TPEG message encapsulation unit, being used for described TEC assembly and SNI component package is TPEG message.
7. device as claimed in claim 6 is characterized in that, described TEC message acquiring unit specifically comprises:
TMC message reading unit is used for the message groups from TMC, reads a TMC message;
The event code reading unit is used for extracting the TMC event code from the described TMC message that reads out;
TEC incident acquiring unit is used for searching the record whether described TMC event code correspondence is arranged at the TMC-TEC incident mapping table that presets, if having, then according to the TEC event attribute value in the described TMC event code corresponding record, makes up the TEC event container;
Reference by location container construction unit is used for making up the reference by location container of TEC according to from TMC message extract location information;
The management container construction unit is used to the TEC distribution of messages message identifier and the version identifier of described TMC message correspondence, according to described message id and revision ID, makes up the management container of TEC message;
TEC message encapsulation unit is used for the event container according to TEC, and TEC reference by location container and TEC management container make up a TEC message.
8. as claim 6 or 7 described devices, it is characterized in that TEC component package unit specifically comprises:
The message sequence judging unit is used for judging whether described TEC message is article one TEC message that described TMC message groups is converted to, if, then trigger TEC building component unit, if not, then trigger TEC assembly capacity judging unit;
Described TEC assembly capacity judging unit is used to judge that can existing TEC assembly hold described TEC message, if can, then trigger TEC module information adding device, if can not, TEC building component unit then triggered;
Described TEC module information adding device is used for adding described TEC message to described existing TEC assembly;
Described TEC building component unit is used to create a new TEC assembly, and described TEC message is added in the described new TEC assembly.
9. as claim 6 or 7 described devices, it is characterized in that TEC component package unit specifically comprises:
Assembly capacity judging unit is used for judging whether a TEC assembly can hold all TEC message that are converted to from the TMC message groups, if can, then trigger a TEC building component unit, if can not, the 2nd TEC building component unit then triggered;
A described TEC building component unit is used to create a TEC assembly, and described all TEC message are added in the TEC assembly;
Described the 2nd TEC building component unit is used for creating at least two TEC assemblies, and described all TEC message are added in the corresponding TEC assembly.
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