CN103179685A - Method and system for maintaining communication links - Google Patents
Method and system for maintaining communication links Download PDFInfo
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- CN103179685A CN103179685A CN2013100777167A CN201310077716A CN103179685A CN 103179685 A CN103179685 A CN 103179685A CN 2013100777167 A CN2013100777167 A CN 2013100777167A CN 201310077716 A CN201310077716 A CN 201310077716A CN 103179685 A CN103179685 A CN 103179685A
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Abstract
The invention is applicable to the technical field of mobile communication, and provides a method and a system for maintaining communication links. The method includes receiving prompting data; transmitting an AT (attention) command to a GPRS (general packet radio service) module according to the prompting data so as to acquire remote configuration parameters which include PDP (packet data protocol) contextual information and communication parameters; judging whether the acquired PDP contextual information and the acquired communication parameters are consistent with locally stored PDP contextual information and locally stored communication parameters or not; and maintaining channels according to comparison results if the acquired PDP contextual information and the acquired communication parameters are inconsistent with the locally stored PDP contextual information and the locally stored communication parameters. The method and the system have the advantages that the channels are maintained according to the comparison results, and the problem of deficiency of an inter-channel switching mechanism and a link maintenance function of communication in an existing AT command mode in the prior art is solved.
Description
Technical field
The invention belongs to the mobile communication technology field, relate in particular to a kind of communication link maintaining method and system.
Background technology
Along with general packet radio service (General Packet Radio Service, GPRS) development of the communication technology, its application in field of data transmission is also increasingly extensive, and increasing end product begins to adopt this wireless technology with outstanding communication function.Using the GPRS wireless communication module to carry out having in transfer of data a kind of mode is to adopt Modem commands language (AT order), communication terminal is connected by serial ports with the GPRS wireless communication module of supporting the AT order, communication terminal must send the AT order to the GPRS module makes GPRS module and distance host complete the foundation of link, and the sending and receiving of data; But prior art adopts described AT command mode communication, can't make GPRS module and distance host carry out passage switches, can not safeguard the link between described GPRS module and distance host, lack the function of interchannel handover mechanism and link maintenance, using has certain limitation.
Summary of the invention
The purpose of the embodiment of the present invention is to provide a kind of communication link maintaining method and system, lacks the function of interchannel handover mechanism and link maintenance to solve employing AT command mode that prior art exists, uses the problem that certain limitation is arranged.
For addressing the above problem, the present invention has adopted a kind of communication link maintaining method, said method comprising the steps of:
Receive reminder-data, described reminder-data is used for receiving new data to communication terminal prompting GPRS module from distance host;
According to described reminder-data, send the AT order to the GPRS module and obtain the Remote configuration parameter, described Remote configuration parameter comprises PDP(Packet Data Protocol, packet data protocol) contextual information and communications parameter;
Whether the PDP Context information that judgement is obtained is consistent with PDP Context information and the communications parameter of local storage with communications parameter;
, carry out passage according to comparing result and safeguard when inconsistent when the PDP Context information of the PDP Context information of obtaining and communications parameter and local storage and communications parameter.
Another purpose of embodiments of the invention is to provide a kind of communication link maintenance system, and described system comprises:
Acquiring unit is used for according to described reminder-data, sends the AT order to the GPRS module and obtains the Remote configuration parameter, and described Remote configuration parameter comprises PDP Context information and communications parameter;
Judging unit is used for judging whether the PDP Context information of obtaining is consistent with PDP Context information and the communications parameter of communications parameter and local storage;
Maintenance unit is used for when inconsistent, carrying out passage maintenance according to comparing result when the PDP Context information of obtaining and communications parameter and local PDP Context information of storing and communications parameter.
The present invention is by obtaining PDP Context information and communications parameter from the GPRS module, PDP Context information and the communications parameter of the PDP Context information that contrast is obtained and communications parameter and local storage, realize the attended operations such as opening, closing of passage and switching according to comparing result, solve the AT command mode and had the function that lacks interchannel handover mechanism and link maintenance, used the problem that certain limitation is arranged.
Description of drawings
In order to be illustrated more clearly in the technical scheme in the embodiment of the present invention, the below will do to introduce simply to the accompanying drawing of required use in embodiment or description of the Prior Art, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the realization flow figure of the communication link maintaining method that provides of the embodiment of the present invention;
Fig. 2 is the modular structure figure of the communication link maintenance system that provides of the embodiment of the present invention.
Embodiment
In order to make purpose of the present invention, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, is not intended to limit the present invention.
The embodiment of the present invention provides the communication link maintaining method, described method as shown in Figure 1, concrete steps comprise:
S11, communication terminal receive reminder-data.
In the present embodiment, when the GPRS module received new data from distance host, the GPRS module sent reminder-data to communication terminal, and described reminder-data is used for having received new data to communication terminal prompting GPRS module from distance host.Then, communication terminal receives reminder-data.
S12, according to described reminder-data, communication terminal sends the AT order to the GPRS module and obtains the Remote configuration parameter, described Remote configuration parameter comprises PDP Context information and communications parameter.
in the present embodiment, communication terminal gets the Remote configuration parameter, resolve the Remote configuration parameter and can obtain PDP Context information and communications parameter, described PDP Context information comprises APN (Access Point Name, APN), username and password, communications parameter comprises channel information and other parameter, described channel information comprises gap marker, passage Internet protocol (the Internet Protocol that gap marker is corresponding, IP) address, the tunnel ends slogan that gap marker is corresponding and passage corresponding to gap marker are enabled sign, described other parameter comprises heart time interval etc., because other parameter is more, do not enumerate at this.
Wherein, PDP Context information comprises APN, username and password, and described username and password is used for GPRS module access GPRS network to be used; Tunnel ip address refers to the IP address of distance host in the present embodiment, each passage, a tunnel ip address is just arranged, and the local ip address of GPRS module just obtains when the registration of user of communication terminal identification module (Subscriber Identity Module, SIM) card; In the situation that multiport, the IP address of tunnel ip address and GPRS module is many-to-one corresponding relation; The tunnel ends slogan comprises local port number and distal end slogan, refer to respectively in the present embodiment GPRS module end slogan and distance host port numbers, in multichannel situation, GPRS module end slogan and distance host port numbers are corresponding one by one, passage is enabled to be masked as and is opened or close, and is used for identifying the opening and closing of passage.
Need to prove, tunnel ip address and tunnel ends slogan are used for the communication between GPRS module and distance host, pass through serial communication between GPRS module and communication terminal.
Whether the PDP Context information that S13, communication terminal judgement are obtained is consistent with PDP Context information and the communications parameter of local storage with communications parameter.
When the PDP Context information of S14, the PDP Context information of obtaining when communication terminal and communications parameter and local storage and communications parameter are inconsistent, carry out passage according to comparing result and safeguard.
Need to prove, passage safeguards and to comprise that passage switches, passage is opened and to close, and link is the set of all passages, and link maintenance can think that also passage safeguards.
In the present embodiment, the method that realizes described S14 comprises:
The PDP Context information that the communication terminal contrast is obtained and the PDP Context information of local storage;
When the PDP Context information of obtaining and the local PDP Context information inconsistency of storing, the channel status of communication terminal change self storage is for closing, and send the AT order to the GPRS module, so that the GPRS module is closed all passages also according to the PDP Context information and executing link establishment flow process of obtaining;
Communication terminal uses the PDP Context information and the communications parameter that obtain to replace PDP Context information and the communications parameter of local storage.
Need to prove, also may there be difference between that obtain and local communications parameter, just when PDP Context information is more inconsistent, no longer communications parameter is compared, but directly the PDP Context information and the communications parameter that obtain are replaced PDP Context information and the communications parameter of local storage.
need to prove that described all passages and the described execution link establishment flow process of closing sends AT order indication GPRS module by communication terminal and realize, carrying out the link establishment flow process comprises initialization GPRS environment and sets up link, described initialization GPRS environment mainly comprises the configuration of initialization PDP Context, be socketed sub-Socket configuration, the subprocess such as GPRS activation and communications parameter configuration, communications parameter mainly comprises communication modes (TCP or UDP), gap marker, passage is enabled sign, tunnel ip address, the tunnel ends slogan, setting up link refers to enable sign according to passage, open all passages and enable the passage that is masked as unlatching, the present embodiment concrete methods of realizing communication terminal is to enable sign according to the passage of the communications parameter that obtains, to GPRS module transmission AT order, passage being enabled the passage that is masked as unlatching opens, the GPRS module is utilized distance host IP address and distal end slogan, be connected to distance host by TCP or udp protocol, distance host utilizes described distal end slogan to monitor, accept the long-range connection of GPRS module, then the GPRS module is after confirming connection result, return to the AT response data to communication terminal, communication terminal responds by AT the real-time status that process of analysis could obtain passage, the real-time status of passage comprises: connect, disconnection and monitoring etc.AT responds the process of analysis implementation method, and communication terminal directly puts it into buffer memory after serial ports interrupts obtaining the AT response data, and constantly the cycle detection buffer memory, in case find new data, carry out immediately the AT response data and resolve.
In the present embodiment, when above-mentioned steps is found the PDP Context information inconsistency of the PDP Context information obtained and local storage by contrast, closeall passage, upgrade the PDP Context information of local storage, then rebulid link, reached the PDP authentication information has effectively been managed, guaranteed the effect of system safety.
Optionally, said method also comprises:
When the PDP Context information of the PDP Context information of obtaining when communication terminal and local storage is consistent, the communications parameter of the communications parameter that contrast is obtained and local storage;
When the tunnel ends slogan that tunnel ip address corresponding to gap marker and gap marker are corresponding consistent, and the passage that described gap marker is corresponding is enabled sign when inconsistent, communication terminal sends the AT order to the GPRS module, so that in the communications parameter that the GPRS module is obtained communication terminal, passage is enabled and is masked as the passage of enabling and opens, in the communications parameter that communicating terminal is obtained, passage is enabled and is masked as the pathway closure of closing;
Communication terminal uses the communications parameter that obtains to replace the communications parameter of local storage.
In the present embodiment, the channel information in the communications parameter of the communications parameter that contrast is obtained and local storage is according to the beneficial effect of comparing result realization to switching and the maintenance of passage.
Optionally, said method also comprises:
When passage corresponding to described gap marker enabled sign unanimously, and when the tunnel ends slogan that the tunnel ip address that described gap marker is corresponding and/or gap marker are corresponding is inconsistent, communication terminal sends the AT order to the GPRS module, so that the GPRS module passage that described gap marker is corresponding restarts;
Communication terminal uses the communications parameter that obtains to replace the communications parameter of local storage.
Need to prove, if a plurality of above-mentioned passages are arranged, needing one by one, passage restarts.
In the present embodiment, passage restarts and refers to then pathway closure is opened passage, restarts to reach by passage the communications parameter that obtains is come into force, and has guaranteed the correctness of channel parameters, has reached the beneficial effect that channel parameters is safeguarded; In the time of need to reconnecting even the passage interruption appears in system, do not worry causing connecting fault because the two ends parameter is inconsistent yet.
The embodiment of the present invention provides the communication link maintenance system, and described system specifically comprises as shown in Figure 2:
Receiving element 21 is used for communication terminal and receives reminder-data.
Acquiring unit 22 is used for according to described reminder-data, and communication terminal sends the AT order to the GPRS module and obtains the Remote configuration parameter, and described Remote configuration parameter comprises PDP Context information and communications parameter.
Optionally, described maintenance unit 24 comprises:
First contrasts module, is used for PDP Context information and local PDP Context information of storing that the communication terminal contrast is obtained;
The first maintenance module, be used for when the PDP Context information of obtaining and the local PDP Context information inconsistency of storing, the channel status of communication terminal change self storage is for closing, and send the AT order to the GPRS module, so that the GPRS module is closed all passages also according to the PDP Context information and executing link establishment flow process of obtaining;
The first replacement module is used for communication terminal and uses the PDP Context information and the communications parameter that obtain to replace PDP Context information and the communications parameter of local storage.
Optionally, described maintenance unit 24 also comprises:
The second contrast module is used for the PDP Context information of the PDP Context information obtained when communication terminal and local storage when consistent, the communications parameter that store the communications parameter that contrast is obtained and this locality;
The second maintenance module, be used for when tunnel ends slogan corresponding to tunnel ip address corresponding to gap marker and gap marker consistent, and the passage that described gap marker is corresponding is enabled sign when inconsistent, communication terminal sends the AT order to the GPRS module, so that in the communications parameter that the GPRS module is obtained communication terminal, passage is enabled and is masked as the passage of enabling and opens, in the communications parameter that communicating terminal is obtained, passage is enabled and is masked as the pathway closure of closing;
The second replacement module is used for communication terminal and uses the communications parameter that obtains to replace the communications parameter of local storage.
Optionally, described maintenance unit 24 also comprises:
The third dimension is protected module, be used for enabling sign unanimously when passage corresponding to described gap marker, and when the tunnel ends slogan that the tunnel ip address that described gap marker is corresponding and/or gap marker are corresponding is inconsistent, communication terminal sends the AT order to the GPRS module, so that the GPRS module passage that described gap marker is corresponding restarts;
The 3rd replacement module is used for communication terminal and uses the communications parameter that obtains to replace the communications parameter of local storage.
One of ordinary skill in the art will appreciate that as the included modules of above-described embodiment is to divide according to function logic, but be not limited to above-mentioned division, as long as can realize corresponding function; In addition, the concrete title of each functional module also just for the ease of mutual differentiation, is not limited to protection scope of the present invention.
Those of ordinary skills it is also understood that, realize that all or part of step in above-described embodiment communication link maintaining method is to come the relevant hardware of instruction to complete by program, described program can be in being stored in communication link maintenance system read/write memory medium, described storage medium comprises ROM/RAM etc.
The above is only preferred embodiment of the present invention, not in order to limiting the present invention, all any modifications of doing within the spirit and principles in the present invention, is equal to and replaces and improvement etc., within all should being included in protection scope of the present invention.
Claims (8)
1. a communication link maintaining method, is characterized in that, described method comprises:
Receive reminder-data, described reminder-data is used for receiving new data to communication terminal prompting GPRS module from distance host;
According to described reminder-data, send the AT order to the GPRS module and obtain the Remote configuration parameter, described Remote configuration parameter comprises PDP Context information and communications parameter;
Whether the PDP Context information that judgement is obtained is consistent with PDP Context information and the communications parameter of local storage with communications parameter;
, carry out passage according to comparing result and safeguard when inconsistent when the PDP Context information of the PDP Context information of obtaining and communications parameter and local storage and communications parameter.
2. the method for claim 1, is characterized in that, described PDP Context information and the PDP Context information of communications parameter and local storage and communications parameter when inconsistent when obtaining carries out passage according to comparing result and safeguard and comprise:
Contrast PDP Context information and local storage with PDP Context information;
When the PDP Context information of obtaining and the local PDP Context information inconsistency of storing, the channel status of communication terminal change self storage is for closing, and send the AT order to the GPRS module, so that the GPRS module is closed all passages also according to the PDP Context information and executing link establishment flow process of obtaining;
The PDP Context information that use is obtained and communications parameter are replaced PDP Context information and the communications parameter of local storage.
3. method as claimed in claim 2, is characterized in that, described method also comprises:
When the PDP Context information of the PDP Context information of obtaining and local storage is consistent, the communications parameter of the communications parameter that contrast is obtained and local storage;
When the tunnel ends slogan that tunnel ip address corresponding to gap marker and gap marker are corresponding consistent, and the passage that described gap marker is corresponding is enabled sign when inconsistent, communication terminal sends the AT order to the GPRS module, so that in the communications parameter that the GPRS module is obtained communication terminal, passage is enabled and is masked as the passage of enabling and opens, in the communications parameter that communicating terminal is obtained, passage is enabled and is masked as the pathway closure of closing;
The communications parameter that use is obtained is replaced the communications parameter of local storage.
4. method as claimed in claim 3, is characterized in that, described method also comprises:
When passage corresponding to described gap marker enabled sign unanimously, and when the tunnel ends slogan that the tunnel ip address that described gap marker is corresponding and/or gap marker are corresponding is inconsistent, communication terminal sends the AT order to the GPRS module, so that the GPRS module passage that described gap marker is corresponding restarts;
The communications parameter that use is obtained is replaced the communications parameter of local storage.
5. a communication link maintenance system, is characterized in that, described system comprises:
Receiving element is used for receiving reminder-data;
Acquiring unit is used for according to described reminder-data, sends the AT order to the GPRS module and obtains the Remote configuration parameter, and described Remote configuration parameter comprises PDP Context information and communications parameter;
Judging unit is used for judging whether the PDP Context information of obtaining is consistent with PDP Context information and the communications parameter of communications parameter and local storage;
Maintenance unit is used for when inconsistent, carrying out passage maintenance according to comparing result when the PDP Context information of obtaining and communications parameter and local PDP Context information of storing and communications parameter.
6. system as claimed in claim 5, is characterized in that, described maintenance unit comprises:
First contrasts module, is used for PDP Context information and local PDP Context information of storing that contrast is obtained;
The first maintenance module, be used for when the PDP Context information of obtaining and the local PDP Context information inconsistency of storing, the channel status of communication terminal change self storage is for closing, and send the AT order to the GPRS module, so that the GPRS module is closed all passages also according to the PDP Context information and executing link establishment flow process of obtaining;
The first replacement module is used for using the PDP Context information and the communications parameter that obtain to replace PDP Context information and the communications parameter of local storage.
7. system as claimed in claim 6, is characterized in that, described maintenance unit also comprises:
The second contrast module is used for PDP Context information when the PDP Context information of obtaining and local storage when consistent, the communications parameter that store the communications parameter that contrast is obtained and this locality;
The second maintenance module, be used for when tunnel ends slogan corresponding to tunnel ip address corresponding to gap marker and gap marker consistent, and the passage that described gap marker is corresponding is enabled sign when inconsistent, communication terminal sends the AT order to the GPRS module, so that in the communications parameter that the GPRS module is obtained communication terminal, passage is enabled and is masked as the passage of enabling and opens, in the communications parameter that communicating terminal is obtained, passage is enabled and is masked as the pathway closure of closing;
The second replacement module is used for using the communications parameter that obtains to replace the communications parameter of local storage.
8. system as claimed in claim 7, is characterized in that, described maintenance unit also comprises:
The third dimension is protected the unit, be used for enabling sign unanimously when passage corresponding to described gap marker, and when the tunnel ends slogan that the tunnel ip address that described gap marker is corresponding and/or gap marker are corresponding is inconsistent, communication terminal sends the AT order to the GPRS module, so that the GPRS module passage that described gap marker is corresponding restarts;
The 3rd replacement module is used for using the communications parameter that obtains to replace the communications parameter of local storage.
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| CN115696318B (en) * | 2023-01-05 | 2023-05-09 | 中国电子科技集团公司第三十研究所 | Secure communication device, secure authentication method, and secure communication method |
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