CN103179685B - A kind of communication link maintaining method and system - Google Patents
A kind of communication link maintaining method and system Download PDFInfo
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- CN103179685B CN103179685B CN201310077716.7A CN201310077716A CN103179685B CN 103179685 B CN103179685 B CN 103179685B CN 201310077716 A CN201310077716 A CN 201310077716A CN 103179685 B CN103179685 B CN 103179685B
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Abstract
The present invention is applicable to mobile communication technology field, it is provided that a kind of communication link maintaining method and system, and described method includes: receive prompting data；According to described prompting data, sending AT order to GPRS module and obtain Remote configuration parameter, described Remote configuration parameter includes PDP Context information and communications parameter；Judge that the PDP Context information obtained is the most consistent with locally stored PDP Context information and communications parameter with communications parameter；When the PDP Context information obtained and communications parameter are inconsistent with locally stored PDP Context information and communications parameter, carry out passage maintenance according to comparing result.The present invention carries out passage maintenance by comparing result, solves the AT command mode communication shortage interchannel handover mechanism of prior art existence and the problem of the function of link maintenance.
Description
Technical field
The invention belongs to mobile communication technology field, particularly relate to a kind of communication link maintaining method
And system.
Background technology
Along with general packet radio service (General Packet Radio Service, GPRS) is led to
The development of letter technology, it is the most increasingly extensive in the application of field of data transmission, more and more eventually
End product begins with this wireless technology with prominent communication function.Use GPRS wireless
Communication module has a kind of mode to be to use Modem commands language in carrying out data transmission
(AT order), communication terminal passes through with the GPRS wireless communication module supporting AT order
Serial ports connect, communication terminal must to GPRS module send AT order make GPRS module with
Distance host completes the foundation of link, and the transmission of data and reception；But prior art
Use described AT command mode communication, it is impossible to make GPRS module and distance host carry out passage
Switching, can not safeguard the link between described GPRS module and distance host, lacks
Weary interchannel handover mechanism and the function of link maintenance, use and have 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, with
Solve employing AT command mode shortage interchannel handover mechanism and link dimension that prior art exists
The function protected, uses the problem having certain limitation.
For solving the problems referred to above, present invention employs a kind of communication link maintaining method, described side
Method comprises the following steps:
Receive prompting data, described prompting data for communication terminal prompting GPRS module from
Distance host receives new data；
According to described prompting data, send AT order to GPRS module and obtain Remote configuration ginseng
Number, described Remote configuration parameter includes PDP(Packet Data Protocol, and grouped data is assisted
View) contextual information and communications parameter；
Judge that PDP Context information and the communications parameter of acquisition are upper and lower with locally stored PDP
Literary composition information is the most consistent with communications parameter；
When the PDP Context information obtained and communications parameter and locally stored PDP Context
When information and communications parameter are inconsistent, carry out passage maintenance according to comparing result.
The another object of embodiments of the invention is to provide a kind of communication link to safeguard system, institute
The system of stating includes:
Acquiring unit, for according to described prompting data, sending AT order to GPRS module
Obtaining Remote configuration parameter, described Remote configuration parameter includes PDP Context information and communication
Parameter；
Judging unit, for judging that the PDP Context information obtained and communications parameter are with local
The PDP Context information of storage is the most consistent with communications parameter；
Maintenance unit, for depositing with this locality when the PDP Context information obtained and communications parameter
When the PDP Context information of storage and communications parameter are inconsistent, carry out passage according to comparing result
Safeguard.
The present invention is by obtaining PDP Context information and communications parameter from GPRS module, right
Compare the PDP Context information obtained and communications parameter and locally stored PDP Context information
And communications parameter, realize the opening of passage according to comparing result, close and behaviour is safeguarded in switching etc.
Make, solve AT command mode and there is shortage interchannel handover mechanism and the function of link maintenance,
Use the problem having certain limitation.
Accompanying drawing explanation
For the technical scheme being illustrated more clearly that in the embodiment of the present invention, below will be to embodiment
Or the required accompanying drawing used is briefly described in description of the prior art, it should be apparent that under,
Accompanying drawing during face describes is only some embodiments of the present invention, for ordinary skill people
From the point of view of Yuan, on the premise of not paying creative work, it is also possible to obtain it according to these accompanying drawings
His accompanying drawing.
Fig. 1 is the flowchart of the communication link maintaining method that the embodiment of the present invention provides；
Fig. 2 is the function structure chart that the communication link that the embodiment of the present invention provides safeguards system.
Detailed description of the invention
In order to make the purpose of the present invention, technical scheme and advantage clearer, below in conjunction with
Drawings and Examples, are further elaborated to the present invention.Should be appreciated that this place is retouched
The specific embodiment stated only in order to explain the present invention, is not intended to limit the present invention.
Embodiments provide communication link maintaining method, described method as shown in Figure 1,
Concrete steps include:
S11, communication terminal receive prompting data.
In the present embodiment, when GPRS module receives new data from distance host,
GPRS module sends prompting data to communication terminal, and described prompting data are for communication terminal
Prompting GPRS module have received new data from distance host.Then, communication terminal receives
Prompting data.
S12, according to described prompting data, communication terminal sends AT order to GPRS module
Obtaining Remote configuration parameter, described Remote configuration parameter includes PDP Context information and communication
Parameter.
In the present embodiment, communication terminal gets Remote configuration parameter, resolves Remote configuration ginseng
Number can obtain PDP Context information and communications parameter, and described PDP Context information includes
APN (Access Point Name, APN), username and password, communications parameter
Including channel information and other parameter, described channel information includes gap marker, gap marker pair
Corresponding logical of passage Internet protocol (Internet Protocol, the IP) address answered, gap marker
Road port numbers and passage corresponding to gap marker enable mark, and other parameter described includes heart beating
Time interval etc., because other parameter is more, numerous to list herein.
Wherein, PDP Context information includes APN, username and password, described user name
Access GPRS network with password for GPRS module to use；Passage IP in the present embodiment
Address refers to the IP address of distance host, each passage, just has a tunnel ip address,
And the local ip address of GPRS module is at user of communication terminal identification module
Obtain during the registration of (Subscriber Identity Module, SIM) card；At multiport
In the case of, the IP address of tunnel ip address and GPRS module is many-to-one corresponding relation；
Tunnel ends slogan includes local port number and distal end slogan, refers respectively in the present embodiment
GPRS module port numbers and distance host port numbers, in the case of multichannel, GPRS mould
Block port numbers and distance host port numbers one_to_one corresponding, passage enables and is masked as being turned on and off,
It is used for identifying the opening and closing of passage.
It should be noted that tunnel ip address and tunnel ends slogan are used for GPRS module with remote
Communication between journey main frame, passes through serial communication between GPRS module and communication terminal.
S13, communication terminal judge that the PDP Context information obtained and communications parameter are deposited with this locality
The PDP Context information of storage is the most consistent with communications parameter.
S14, when communication terminal obtain PDP Context information and communications parameter with locally stored
PDP Context information and communications parameter inconsistent time, carry out passage dimension according to comparing result
Protect.
It should be noted that passage is safeguarded includes that passage switching, passage are opened and closed, link
Being the set of all passages, link maintenance is it is also assumed that be that passage is safeguarded.
In the present embodiment, it is achieved the method for described S14 includes:
The PDP Context information of communication terminal contrast acquisition and locally stored PDP Context
Information；
When the PDP Context information obtained and locally stored PDP Context information are inconsistent
Time, the channel status of self storage of communication terminal change is for closing, and sends to GPRS module
AT order, so that GPRS module closes all passages and according to the PDP Context obtained
Information performs link establishment flow process；
Communication terminal uses the PDP Context information obtained and communications parameter to replace locally stored
PDP Context information and communications parameter.
It should be noted that obtain and also likely to be present difference between the communications parameter of this locality,
Simply when PDP Context information is less consistent, no longer communications parameter is compared,
But directly the PDP Context information obtained and communications parameter are replaced locally stored PDP
Contextual information and communications parameter.
It should be noted that all passages of described closedown and described execution link establishment flow process, by
Communication terminal sends AT order instruction GPRS module and realizes；Perform link establishment flow process bag
Include initialization GPRS environment and set up link, at the beginning of described initialization GPRS environment mainly includes
Beginningization PDP Context configures, is socketed sub-Socket configuration, GPRS activation and communications parameter
The subprocess such as configuration, communications parameter mainly includes communication modes (TCP or UDP), passage
Mark, passage enable mark, tunnel ip address, tunnel ends slogan, set up link and refer to root
Enabling mark according to passage, open all passages and enable the passage being masked as opening, the present embodiment has
Body implementation method communication terminal is that the passage according to the communications parameter obtained enables mark, to
Passage is enabled the passage being masked as opening and opens by GPRS module transmission AT order, GPRS
Module utilizes distance host IP address and distal end slogan, by TCP or udp protocol
Being connected to distance host, distance host utilizes described distal end slogan to monitor, and accepts GPRS
The long-range connection of module, then GPRS module is after confirming connection result, returns to communication terminal
Returning AT response data, communication terminal could obtain the reality of passage by AT response process of analysis
Time state, the real-time status of passage includes: connects, disconnect and monitoring etc..AT responds parsing
Flow process implementation method is, communication terminal, after serial ports interrupts obtaining AT response data, directly will
It puts into caching, and continuous cycle detection caches, and once finds new data, carries out AT immediately and rings
Answer data parsing.
In the present embodiment, above-mentioned steps finds the PDP Context information obtained by contrast
Time inconsistent with locally stored PDP Context information, close all of passage, update this
The PDP Context information of ground storage, then re-establishes link, has reached PDP certification
Information effectively manages, it is ensured that the effect of security of system.
Optionally, said method also includes:
PDP Context information and locally stored PDP Context letter when communication terminal acquisition
When ceasing consistent, the communications parameter of contrast acquisition and locally stored communications parameter；
When the tunnel ends slogan one that the tunnel ip address that gap marker is corresponding is corresponding with gap marker
Cause, and passage corresponding to described gap marker enable mark inconsistent time, communication terminal is to GPRS
Module sends AT order, so that in GPRS module communications parameter that communication terminal is obtained
Passage enables the passage being masked as enabling and opens, passage in the communications parameter obtain communicating terminal
Enable the pathway closure being masked as closing；
Communication terminal uses the communications parameter obtained to replace locally stored communications parameter.
In the present embodiment, contrast in the communications parameter obtained and locally stored communications parameter
Channel information, realizes the switching to passage and the beneficial effect of maintenance according to comparing result.
Optionally, said method also includes:
When the passage that described gap marker is corresponding enables mark unanimously, and described gap marker is corresponding
Tunnel ip address and/or tunnel ends slogan corresponding to gap marker inconsistent time, communication terminal
AT order is sent, so that GPRS module is corresponding by described gap marker to GPRS module
Passage restart；
Communication terminal uses the communications parameter obtained to replace locally stored communications parameter.
If it should be noted that there is multiple above-mentioned passage, then passage one by one is needed to carry out
Restart.
In the present embodiment, passage restarts and refers to, by pathway closure, then be opened by passage,
Restarted by passage and reach to make the communications parameter of acquisition to come into force, it is ensured that channel parameters is just
Really property, has reached the beneficial effect safeguarding channel parameters；Even if system channel interrupt occurs and
When needing to reconnect, without worrying to cause because two ends parameter is inconsistent connecting fault.
Embodiments provide communication link safeguard system, described system as shown in Figure 2,
Specifically include:
Receive unit 21, receive prompting data for communication terminal.
Acquiring unit 22, for according to described prompting data, communication terminal is to GPRS module
Sending AT order and obtain Remote configuration parameter, described Remote configuration parameter includes PDP Context
Information and communications parameter.
Judging unit 23, judges PDP Context information and the communication obtained for communication terminal
Parameter is the most consistent with locally stored PDP Context information and communications parameter.
Maintenance unit 24, for the PDP Context information obtained when communication terminal and communication ginseng
When number is inconsistent with locally stored PDP Context information and communications parameter, according to contrast knot
Fruit carries out passage maintenance.
Optionally, described maintenance unit 24 includes:
First contrast module, contrasts the PDP Context information and this obtained for communication terminal
The PDP Context information of ground storage；
First maintenance module, for as the PDP Context information obtained and locally stored PDP
When contextual information is inconsistent, the channel status of self storage of communication terminal change is closedown, and
AT order is sent, so that GPRS module closes all passages basis to GPRS module
The PDP Context information obtained performs link establishment flow process；
First replacement module, uses, for communication terminal, the PDP Context information obtained and leads to
News parameter replaces locally stored PDP Context information and communications parameter.
Optionally, described maintenance unit 24 also includes:
Second contrast module, for the PDP Context information obtained when communication terminal and this locality
When the PDP Context information of storage is consistent, the communications parameter and locally stored that contrast obtains
Communications parameter；
Second maintenance module, for when tunnel ip address corresponding to gap marker and gap marker
Corresponding tunnel ends slogan is consistent, and passage corresponding to described gap marker to enable mark inconsistent
Time, communication terminal sends AT order to GPRS module, so that GPRS module will communication
In the communications parameter that terminal obtains, passage enables the passage being masked as enabling and opens, by communicating terminal
In the communications parameter obtained, passage enables the pathway closure being masked as closing；
Second replacement module, uses the communications parameter obtained to replace locally stored for communication terminal
Communications parameter.
Optionally, described maintenance unit 24 also includes:
The third dimension protects module, for enabling mark unanimously when the passage that described gap marker is corresponding,
And tunnel ip address corresponding to described gap marker and/or tunnel ends slogan corresponding to gap marker
Time inconsistent, communication terminal sends AT order to GPRS module, so that GPRS module
Passage corresponding for described gap marker is restarted；
3rd replacement module, uses the communications parameter obtained to replace locally stored for communication terminal
Communications parameter.
One of ordinary skill in the art will appreciate that the modules included by above-described embodiment
It is to carry out dividing according to function logic, but is not limited to above-mentioned division, as long as can
Realize corresponding function；It addition, the specific name of each functional module also only to facilitate
Mutually distinguish, be not limited to protection scope of the present invention.
Those of ordinary skill in the art it is also understood that, it is achieved above-described embodiment communication link is safeguarded
All or part of step in method can be by program and completes to instruct relevant hardware,
Described program can be safeguarded in system read/write memory medium being stored in communication link, described
Storage medium, including ROM/RAM etc..
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention,
All any amendment, equivalent and improvement etc. made within the spirit and principles in the present invention,
Should be included within the scope of the present invention.
Claims (8)
1. a communication link maintaining method, it is characterised in that described method includes:
Receive prompting data, described prompting data for communication terminal prompting GPRS module from
Distance host receives new data；
According to described prompting data, send AT order to GPRS module and obtain Remote configuration ginseng
Number, described Remote configuration parameter includes PDP Context information and communications parameter；
Judge that PDP Context information and the communications parameter of acquisition are upper and lower with locally stored PDP
Literary composition information is the most consistent with communications parameter；
When the PDP Context information obtained and communications parameter and locally stored PDP Context
When information and communications parameter are inconsistent, carry out link maintenance according to comparing result.
2. the method for claim 1, it is characterised in that described as the PDP obtained
Contextual information and communications parameter and locally stored PDP Context information and communications parameter are not
Time consistent, carry out link maintenance according to comparing result and include:
Contrast PDP Context information and locally stored PDP Context information；
When the PDP Context information obtained and locally stored PDP Context information are inconsistent
Time, the channel status of self storage of communication terminal change is for closing, and sends to GPRS module
AT order, so that GPRS module closes all passages and according to the PDP Context obtained
Information performs link establishment flow process；
The PDP Context information obtained and communications parameter is used to replace on locally stored PDP
Context information and communications parameter.
3. method as claimed in claim 2, it is characterised in that described method also includes:
When the PDP Context information obtained is consistent with locally stored PDP Context information,
The communications parameter of contrast acquisition and locally stored communications parameter；
When the tunnel ends slogan one that the tunnel ip address that gap marker is corresponding is corresponding with gap marker
Cause, and passage corresponding to described gap marker enable mark inconsistent time, communication terminal is to GPRS
Module sends AT order, so that in GPRS module communications parameter that communication terminal is obtained
Passage enables the passage being masked as enabling and opens, passage in the communications parameter obtain communicating terminal
Enable the pathway closure being masked as closing；
The communications parameter obtained is used to replace locally stored communications parameter.
4. method as claimed in claim 3, it is characterised in that described method also includes:
When the passage that described gap marker is corresponding enables mark unanimously, and described gap marker is corresponding
Tunnel ip address and/or tunnel ends slogan corresponding to gap marker inconsistent time, communication terminal
AT order is sent, so that GPRS module is corresponding by described gap marker to GPRS module
Passage restart；
The communications parameter obtained is used to replace locally stored communications parameter.
5. a communication link safeguards system, it is characterised in that described system includes:
Receive unit, be used for receiving prompting data；
Acquiring unit, for according to described prompting data, sending AT order to GPRS module
Obtaining Remote configuration parameter, described Remote configuration parameter includes PDP Context information and communication
Parameter；
Judging unit, for judging that the PDP Context information obtained and communications parameter are with local
The PDP Context information of storage is the most consistent with communications parameter；
Maintenance unit, for depositing with this locality when the PDP Context information obtained and communications parameter
When the PDP Context information of storage and communications parameter are inconsistent, carry out link according to comparing result
Safeguard.
6. system as claimed in claim 5, it is characterised in that described maintenance unit includes:
First contrast module, for contrasting the PDP Context information of acquisition with locally stored
PDP Context information；
First maintenance module, for as the PDP Context information obtained and locally stored PDP
When contextual information is inconsistent, the channel status of self storage of communication terminal change is closedown, and
AT order is sent, so that GPRS module closes all passages basis to GPRS module
The PDP Context information obtained performs link establishment flow process；
First replacement module, for using the PDP Context information of acquisition and communications parameter to replace
Change locally stored PDP Context information and communications parameter.
7. system as claimed in claim 6, it is characterised in that described maintenance unit also wraps
Include:
Second contrast module, for as the PDP Context information obtained and locally stored PDP
When contextual information is consistent, the communications parameter of contrast acquisition and locally stored communications parameter；
Second maintenance module, for when tunnel ip address corresponding to gap marker and gap marker
Corresponding tunnel ends slogan is consistent, and passage corresponding to described gap marker to enable mark inconsistent
Time, communication terminal sends AT order to GPRS module, so that GPRS module will communication
In the communications parameter that terminal obtains, passage enables the passage being masked as enabling and opens, by communicating terminal
In the communications parameter obtained, passage enables the pathway closure being masked as closing；
Second replacement module, for using the communications parameter of acquisition to replace locally stored communication ginseng
Number.
8. system as claimed in claim 7, it is characterised in that described maintenance unit also wraps
Include:
The third dimension protects module, for enabling mark unanimously when the passage that described gap marker is corresponding,
And tunnel ip address corresponding to described gap marker and/or tunnel ends slogan corresponding to gap marker
Time inconsistent, communication terminal sends AT order to GPRS module, so that GPRS module
Passage corresponding for described gap marker is restarted；
3rd replacement module, for using the communications parameter of acquisition to replace locally stored communication ginseng
Number.
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Cited By (1)
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| CN115696318A (en) * | 2023-01-05 | 2023-02-03 | 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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| US9825966B2 (en) * | 2014-12-18 | 2017-11-21 | Intel Corporation | System platform for context-based configuration of communication channels |
| US10182379B2 (en) * | 2015-01-28 | 2019-01-15 | Hfi Innovation Inc. | Offloadability of PDN connection for LTE-WLAN interworking control and management |
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