CN102882898A - Online group interaction system and method based on RDS (Remote Data Services) - Google Patents
Online group interaction system and method based on RDS (Remote Data Services) Download PDFInfo
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- CN102882898A CN102882898A CN201110192609XA CN201110192609A CN102882898A CN 102882898 A CN102882898 A CN 102882898A CN 201110192609X A CN201110192609X A CN 201110192609XA CN 201110192609 A CN201110192609 A CN 201110192609A CN 102882898 A CN102882898 A CN 102882898A
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Abstract
The invention discloses an online group interaction system and method based on RDS (Remote Data Services). The method comprises the following steps that: a client side transmits a request to a server side through an SMS (Short Message Service) protocol or an HTTP (Hyper Text Transfer Protocol); the server carries out the logical processing and data persistence; the server periodically transmits the latest globe control information to a radio station; the radio station receives the globe control information and modulates the RDS broadcast; the client side separates the audio and digital information through RDS demodulation and stores valid messages to the local after receiving an FM (Frequency Modulation) modulating signal, the client side automatically updates show views according to the globe control information in the RDS messages. According to the technical scheme provided by the invention, due to the fact that the RDS carries out the data broadcast only by means of the rich frequency range of the existing modulation frequency broadcast, the site building input can be reduced greatly, the client side receives RDS broadcast information without information charges. The system and the method can be a more convenient information acquiring way for the vast rural areas with incomplete internet coverage and low-income users and the middle-low income community in the cities.
Description
Technical field
The present invention relates to wireless communication technology field, relate in particular to a kind of system and method for the online group communication based on the RDS communication mode.
Background technology
At present, have abundant group communication formula based on the Web technology to use on the Internet, this kind application take the Internet as transmission medium, take service provider server and subscriber computer as processing terminal, take client software as the information interaction window.At first, its communication characteristics are: client and server uses the interactive mode of Request-Response (request-response) to finish communication by http protocol.In communication process, client is responsible for sending user request, and the client-requested processing module of server is finished request receiving, parameter extraction, and response such as returns at the operation.Secondly, its application characteristic is: the user of same group shares identical application scenarios, and the user's of different groups application scenarios is not identical, and the user can only carry out information interaction with the member of group inside, and the user inside and outside the group is for being transparent each other.After the serviced device of certain user's individual requests was processed, server also can send to every other on the same group user with the overall control information after upgrading.Learn by communication and application characteristic analysis, the advantage that this group communication formula is used is: application scenarios can be shared between the multiple terminals, the user by and server between request respond finish with other users alternately; Shortcoming is: for each client-requested, server all will be set up and keep a TCP (Transmission Control Protocol, transmission control protocol) and connect.As multi-user simultaneously when access server, a large amount of TCP connects can the bandwidth consumed resource, only has server to have more intense enabling capabilities and rationally efficient framework guarantee and communicates by letter and finish smoothly.Therefore, the demand of a large number of users access can be drawn high the cost that Web builds a station, and simultaneously, server and client side's communication mode is two-way, and operator all can collect communication cost to client in the process of uplink and downlink.
RDS (Radio Data System, digit broadcasting system) is widely used in broadcast world as a kind of novel Information Communication means.During transmitting, FM broadcasting utilize subcarrier station name, program category, and programme contents etc. send in digital form.There is the receiving terminal of RDS function can receive and show station name, program category, programme content and other information.At present, this technology is mainly used in the aspects such as communication navigation, emergent announcement, time calibration.
Summary of the invention
The method that the purpose of this invention is to provide a kind of online group communication based on RDS: client is used GPRS (General Packet Radio Service in the method, GPRS) wireless communication protocol or SMS (Short Messaging Service, the text SMS business) agreement realizes point-to-point paying uplink communication, (radio station described herein all refers to the FM radio station to the free downlink communication of FM (Frequency Modulation) radio station use RDS agreement realization point-to-multipoint, data and the control information of Web server can be accepted in this radio station, can also send the RDS broadcasting packet).User end to server sends the request that contains client unique identification and this client place group identification, after the server process client-requested result is persisted in the database server, and up-to-date overall control information is sent to the radio station.The radio station is after receiving up-to-date overall control information, and Application standard RDS protocol format encapsulates overall control information and sends with the form of broadcasting.At last, the RDS broadcasting packet in client radio station filters out simultaneously from the bottom of the authentication radio station and belongs to the overall control information of the current place of this client group, and the state that upgrades is shown on the client.
Technical scheme provided by the invention is as follows:
A kind of system of the online group communication based on RDS is characterized in that, described system comprises following functional unit (ginseng Fig. 2, Fig. 3): Web server, database server, radio station and client, wherein,
-Web server: comprise client-requested processing module, business logic processing module and radio station control information communication module;
-database server: comprise that subscriber's meter, group table, user organize relation table etc.;
-radio station: comprise data control information receiver module, RDS message package module and RDS message sending module;
-client: comprise request sending module, RDS message sink, RDS packet parsing device, data persistence module, controller, business logic processing module and view display module;
The data flow of described system is:
A) at first, the request sending module of client sends the user and asks to Web server, the client-requested processing module of Web server receives the request of client and parses parameter, and the operation of the business logic processing module of process Web server is persisted to Data Update in the database server;
B) secondly, the radio station control information communication module of Web server with certain frequency to the current overall control information of the data control information receiver module transmitting system in radio station; The data control information receiver module in radio station is monitored the overall control information from Web server synchronously, and the overall control information that will parse passes to RDS message package module; The RDS broadcasting packet sending module in radio station is broadcasted away overall control information with the form of RDS message;
C) last, the RDS message sink of client receives the RDS broadcasting packet, simultaneously the RDS broadcasting packet is passed to the RDS packet parsing device of client, the data persistence module that overall control information after the parsing at first is persisted to client via controller and the business logic processing module of client successively, then the view display module extracts up-to-date Data Update to the demonstration view of client from the data persistence module.
Step b) overall control information described in comprises: the attribute that the current attribute of the mapping relations between user and the group, user's current attribute, group is relevant with application with other etc.
Simultaneously, the invention provides a kind of method of the online group communication based on RDS, it is characterized in that, comprise the steps:
1) client sends request by SMS agreement or http protocol to server;
2) server carries out logical process and perdurable data: the request that comes from client is accepted and responded to Web server; After associative operation is carried out logical process, the result who operates is persisted in the database server;
3) server sends overall control information to the radio station: the radio station control information communication module of Web server with certain frequency to the current overall control information of the data control information receiver module transmitting system in radio station;
4) radio station receive data modulation RDS broadcasting: the data control information receiver module in radio station is monitored the overall control information from Web server, and the sound programme in up-to-date overall control information and radio station itself carried out the RDS modulation, Word message is loaded in broadcasting after ovennodulation subcarrier part and voice signal send as the RDS message sending module of FM FM signal by the radio station together;
5) client is after the FM FM signal, and audio frequency and digital information are isolated in demodulation through RDS, and legal packet storage is arrived local;
6) client is upgraded view automatically according to the overall control information in the RDS broadcasting packet.
Step 1) in, if the communication process use is http protocol, client will ask directly to send to Web server so; If what communication process used is the SMS agreement, client at first sends to Short Message Service Gateway with request so, through Short Message Service Gateway request is forwarded to Web server again.
Step 1) in, the request of transmission comprises: application adds a group, and a group is withdrawed from application, to the increasing, delete, change, look into of data, and various Data Update and the query manipulation relevant with application.
Step 5) in, client is after receiving the FM FM signal, and the filter of client at first filters out the message from the bottom of non-authentication radio station, and the message of non-client place group.
Step 6) implementation method is: client parses the overall control information in the RDS broadcasting packet, and overall control information is written in the client resource configuration file; The attribute of the various resources of client is extracted out and is placed in the resource distribution file, and the overall control information of server is mainly used in the content of local updating configuration file, and client generates new demonstration view automatically according to current configuration file.
Beneficial effect of the present invention: technical scheme provided by the invention, coverage is more extensive than the Internet, can realize that again single-point that the Internet request response modes can not finish is to the communication of multiple spot.Simultaneously, because RDS just utilizes the rich frequency range of existing FM broadcasting to carry out data broadcast, greatly reduce the input of building a station, simultaneously, client is accepted the RDS broadcast message and be need not the information rate.Will be a kind of easily acquisition of information approach for the vast rural area that this is complete for the Internet covering and user's income is lower and the low-income groups in the city.
Description of drawings
Fig. 1 is the system's deployment diagram in the embodiment of the invention.
Fig. 2 is system block diagram of the present invention.Wherein:
1: database server; The 2:Web server; 3: the radio station; 4: client;
21: the business logic processing module; 22: the client-requested processing module; 23: radio station control information communication module;
31: the data control information receiver module; 32:RDS message package module; 33:RDS message sending module;
Fig. 3 is the software architecture figure of the client in the embodiment of the invention.Wherein:
41: the data persistence module; 42: the business logic processing module; 43: controller; 44:RDS packet parsing device; The 45:RDS message sink; 46: request sending module; 47: the view display module;
Fig. 4 is the logical flow chart of client in the embodiment of the invention.
Fig. 5 is the logical flow chart of server in the example of the present invention
Table 1 is the formal definition of the RDS broadcasting packet of the formal definition of client-requested in the example of the present invention and server.
Table 2 is parameter declarations of table 1 in the example of the present invention.
Embodiment
Below in conjunction with accompanying drawing embodiments of the invention are described in detail.
Referring to Fig. 1, native system is by Web server, database server, and the infrastructure such as radio station and client consist of.Wherein Web server mainly is responsible for the three aspects: content: accept the direct request of client and the Forward-reques of Short Message Service Gateway; Finish and use relevant business logic processing; Regularly overall control information is sent to the Data Control interface in radio station.The three aspects: content mainly is responsible in the radio station: monitor the overall control information from Web server; Encapsulate overall control information to satisfy the form of RDS broadcasting packet; The voice data in packaged RDS broadcasting packet and radio station is carried out outwards launching via high frequency power amplifier after RDS modulation and FM modulate together.The task of client is: will receive broadcast singal and carry out FM solution mediation RDS demodulation, recover audio frequency and digital information, filter out the RDS broadcasting packet in RDS radio station of non-authentication and the RDS broadcasting packet of non-client place group, and utilize the overall control information that parses in the legal message to control different views to represent.
Referring to Fig. 2, Fig. 2 is the software systems block diagram that is deployed in server.The framework of server comprises following module: client-requested processing module, business logic processing module, radio station control information communication module and database table.The client-requested processing module is used for accepting the HTTP request of client, if the user can also send request by the SMS agreement, this module then also needs to accept the Forward-reques of Short Message Service Gateway so.The business logic processing module is mainly processed and is used relevant data calculating, and result is stored in the database table.Storing subscriber information in the database table, group information, the mapping relations of user and group, the data that system journal is relevant with application etc.Control information communication module in radio station is responsible for regularly extracting the Data Control interface that sends to the radio station from the overall control information of database table, and the communication between server and the radio station is finished by SOCKET communication protocol.。
Referring to Fig. 3, the software architecture figure that relates in the client that comprises for the present invention.Client mainly is divided into four parts: RDS message sink and RDS packet parsing device, business logic processing module, controller, data persistence module, view display module and request sending module.RDS message sink and resolver are responsible for the RDS broadcast demodulation is gone out for the overall control information of upgrading the client view, and overall control information are passed to the controller of client.Controller need to determine the service logic of execution.The business logic processing module is the middle tie of view display module and data persistence module, the configuration file that the business logic processing module shows by carrying out different business logical operation change client views makes identical perdurable data obtain different view shows.Referring to Fig. 4, the logical flow chart of the client that comprises for the present invention.Client extracts RN radio station number and GROUP number behind the RDS broadcasting packet in radio station.RN is the abbreviation of Radio Number, and there is a RN number that the overall situation is unique in each radio station.GROUP number is group number, and the broadcasting packet of same group uses identical GROUP number.After extracting RN radio station number and GROUP number two parameter, client judges that at first whether RN is the legal radio station through authentication, if RN continues follow-up parsing so by checking; Otherwise client abandons this RDS broadcasting packet, does not carry out any follow-up parsing, and the error code of operation is 4 (referring to table 2), and client shows wrong view according to error code.Then, judge the GROUP parameter, if GROUP number is not identical with group's group number of client terminal local storage, illustrate that so this broadcasting newspaper is not to issue this client, client abandons this RDS broadcasting packet so, does not carry out follow-up parsing; Otherwise, overall control information being sent to the controller of client, controller calls corresponding business logic processing and operates to extract local perdurable data, is tied on the view.
Referring to Fig. 5, the logical flow chart of the server that comprises for the present invention.At first, server receives the request of client, extracts the parameter (referring to table 1) in the client-requested.SN parameter in the client-requested, METHOD parameter and GROUP parameter are that each client-requested must have, and the CONTENT parameter is spreading parameter, for self-defined application.SN is the abbreviation of Serial Number, and it is the sequence number of client, and each client has unique sequence number in whole system, and this sequence number is through the system authentication granting and be stored in client and server.The desired operation of finishing of this request of the corresponding client of METHOD parameter, these operations can be that operation, the application of newly-built group adds that the operation of certain added group is withdrawed from certain operation that has had group, application and the attribute of client upgraded etc.The GROUP parameter is group's group number of this client place group, if the value of GROUP parameter is 0, this client does not belong to any one group so, if the value of GROUP parameter is the natural number greater than 0, this natural number is exactly group's group number at this client current operation place so.After server has extracted above-mentioned parameter, can carry out following logical process:
The first step: the SN parameter of server authentication client.If this parameter is the number through system verification, can enter follow-up flow process so, otherwise report an error, error code is 1 (referring to table 2), simultaneously error code is returned to client with the form of http response or SMS protocol responses, the result of this operation of notice client..
Second step: server authentication GROUP parameter.If the parameter of GROUP be 0 and corresponding METHOD parameter be create, what this client was carried out so is the operation of newly-built group, server can generate group's group number that total system is unique at random, the mapping relations of group and SN are stored in the database of server, and newly-built group's group number returned to client, message code is 1 (referring to table 2).If the parameter of GROUP is not 0, the group's group number with this locality storage is consistent to check so GROUP number, if inconsistent, return messages code 7 (referring to table 2), otherwise carried out for the 3rd step.
The 3rd step: server authentication METHOD parameter.If the METHOD parameter is update, what this client was carried out so is the operation of upgrading client terminal attribute, server is persisted to the new attribute of client in the database, if success then return messages code 2 (referring to table 2) is given client, otherwise would return error code 2; If the METHOD parameter is join, what this client was carried out so is the operation that adds certain group, server checks whether the mapping of SN and GROUP exists in database, if exist, return messages code 4 (referring to table 2) is given client, otherwise the mapping relations of SN and GROUP are persisted in the database return messages code 3 (referring to table 2); . if the METHOD parameter is quit, what client was carried out so is the operation of withdrawing from certain group, server checks whether the mapping of SN and GROUP has existed in the database, if, mapping relations record of SN and GROUP in the delete database so, and return messages code 5 (referring to table 2), otherwise return messages code 6 (referring to table 2); If the METHOD parameter is the unknown parameter that system can not identify, return messages code 8 (referring to table 2) so.
The formal definition of the RDS broadcasting packet of the formal definition of client-requested and server in table 1 example
Table 2 error code and message code parameter declaration
Claims (7)
1. the system based on the online group communication of RDS is characterized in that, described system comprises following functional unit: Web server (2), database server (1), radio station (3) and client (4), wherein,
-Web server (2): comprise client-requested processing module (22), business logic processing module (21) and radio station control information communication module (23);
-database server (1): comprise that subscriber's meter, group table, user organize relation table;
-radio station (3): comprise data control information receiver module (31), RDS message package module (32) and RDS message sending module (33);
-client (4): comprise request sending module (46), RDS message sink (45), RDS packet parsing device (44), data persistence module (41), controller (43), business logic processing module (42) and view display module (47); The data flow of described system is:
A) at first, the request sending module (46) of client (4) sends the user and asks to Web server (2), the client-requested processing module (22) of Web server receives the request of client and parses parameter, and the operation of the business logic processing module (21) of process Web server is persisted to Data Update in the database server (1);
B) secondly, the radio station control information communication module (23) of Web server (2) is with data control information receiver module (31) the transmitting system current overall control information of certain frequency to the radio station; The data control information receiver module (31) in radio station is monitored the overall control information from Web server synchronously, and the overall control information that will parse passes to RDS message package module (32); The RDS message sending module (33) in radio station is broadcasted away overall control information with the form of RDS broadcasting packet;
C) last, the RDS message sink (45) of client (4) receives the RDS broadcasting packet, simultaneously the RDS broadcasting packet is passed to the RDS packet parsing device (44) of client, the data persistence module (41) that overall control information after the parsing at first is persisted to client via controller (43) and the business logic processing module (42) of client successively, then view display module (47) extracts up-to-date Data Update to the demonstration view of client from data persistence module (41).
2. the system as claimed in claim 1 is characterized in that, step b) described in overall control information comprise: the current attribute of mapping relations, user between user and the group, the attribute that the current attribute of group is relevant with application with other.
3. the method based on the online group communication of RDS is characterized in that, comprises the steps:
1) client sends request by SMS agreement or http protocol to server;
2) server carries out logical process and perdurable data: the request that comes from client is accepted and responded to Web server; After associative operation is carried out logical process, the result who operates is persisted in the database server;
3) server sends overall control information to the radio station: the radio station control information communication module of Web server with certain frequency to the current overall control information of the data control information receiver module transmitting system in radio station;
4) radio station receive data modulation RDS broadcasting: the data control information receiver module in radio station is monitored the overall control information from Web server, and the sound programme in up-to-date overall control information and radio station itself carried out the RDS modulation, Word message is loaded in broadcasting after ovennodulation subcarrier part and voice signal send as the RDS message sending module of FM FM signal by the radio station together;
5) client is after the FM FM signal, and audio frequency and digital information are isolated in demodulation through RDS, and legal packet storage is arrived local;
6) client is upgraded view automatically according to the overall control information in the RDS broadcasting packet.
4. method as claimed in claim 3 is characterized in that step 1) in, if the communication process use is http protocol, client will ask directly to send to Web server so; If what communication process used is the SMS agreement, client at first sends to Short Message Service Gateway with request so, through Short Message Service Gateway request is forwarded to Web server again.
5. method as claimed in claim 3 is characterized in that step 1) in, the request of transmission comprises: application adds a group, and a group is withdrawed from application, to the increasing, delete, change, look into of data, and various Data Update and the query manipulation relevant with application.
6. method as claimed in claim 3 is characterized in that step 5) in, client is after receiving the FM FM signal, and the filter of client at first filters out the message from the bottom of non-authentication radio station, and the message of non-client place group.
7. method as claimed in claim 3 is characterized in that step 6) implementation method be: client parses the overall control information in the RDS broadcasting packet, and overall control information is written in the client resource configuration file; The attribute of the various resources of client is extracted out and is placed in the resource distribution file, and the overall control information of server is mainly used in the content of local updating configuration file, and client generates new demonstration view automatically according to current configuration file.
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Application publication date: 20130116 |