CN114710543B - Method for realizing data service transmission of remote monitoring terminal - Google Patents
Method for realizing data service transmission of remote monitoring terminal Download PDFInfo
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- CN114710543B CN114710543B CN202210315179.4A CN202210315179A CN114710543B CN 114710543 B CN114710543 B CN 114710543B CN 202210315179 A CN202210315179 A CN 202210315179A CN 114710543 B CN114710543 B CN 114710543B
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- sms
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/14—Session management
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
- H04L9/06—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols the encryption apparatus using shift registers or memories for block-wise or stream coding, e.g. DES systems or RC4; Hash functions; Pseudorandom sequence generators
- H04L9/0618—Block ciphers, i.e. encrypting groups of characters of a plain text message using fixed encryption transformation
- H04L9/0631—Substitution permutation network [SPN], i.e. cipher composed of a number of stages or rounds each involving linear and nonlinear transformations, e.g. AES algorithms
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
- H04L9/32—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols including means for verifying the identity or authority of a user of the system or for message authentication, e.g. authorization, entity authentication, data integrity or data verification, non-repudiation, key authentication or verification of credentials
- H04L9/3247—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols including means for verifying the identity or authority of a user of the system or for message authentication, e.g. authorization, entity authentication, data integrity or data verification, non-repudiation, key authentication or verification of credentials involving digital signatures
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W12/00—Security arrangements; Authentication; Protecting privacy or anonymity
- H04W12/03—Protecting confidentiality, e.g. by encryption
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Abstract
The invention discloses a method for realizing data service transmission of a remote monitoring terminal, which comprises the following steps: the PDP session management method is adopted: judging the Running state and the Standby state of the vehicle T-BOX according to the vehicle state; if the T-Box is in a Running state, maintaining the PDP to be always connected; if the T-Box is in the Standby state, the PDP connection is released; in the case of maintaining PDP connection, an uplink IP data transmission buffer retransmission mechanism is adopted: if the wireless network service is not available, the SMS message of the uplink IP channel cannot be sent to the TSP server, and the T-Box caches the SMS message of the TSP server to be sent; if the wireless network service exists, the T-BOX sequentially sends the cached SMS messages, and when the SMS messages are sent, an SMS safe transmission mechanism is adopted for encryption. The invention can intelligently control PDP session management, improves the utilization rate of network resources and saves the electric quantity of the whole vehicle; the uplink IP data transmission caching mechanism is adopted, the reliability of message transmission is guaranteed, SMS safe transmission is adopted, and the communication safety is improved.
Description
Technical Field
The invention relates to the technical field of intelligent control of automobiles, in particular to a method for realizing data service transmission of a remote monitoring terminal.
Background
The prior art connection of vehicles to the network does not distinguish between the operating conditions of the vehicle or T-BOX. The connection state to the PDP has the following two disadvantages in many cases: 1. the PDP is kept constantly connected for a long time, network resources are occupied, and the whole vehicle electric quantity is consumed. 2. And the PDP connection is frequently released, so that when a user initiates a service again, the connection is required to be re-connected, the response time is reduced, and the user experience is influenced.
In addition, the prior art does not adopt a separate SMS secure transmission scheme, only relies on SMS secure communication of operators, and is easy to crack in batches. For segmented SMS, if part of SMS transmission is successful, part of SMS transmission fails, and only the failed SMS is cached, which easily causes background data reorganization errors and parsing errors.
Disclosure of Invention
The invention aims to solve the technical problem of providing a method for realizing data service transmission of a remote monitoring terminal aiming at the defects in the prior art.
The technical scheme adopted for solving the technical problems is as follows:
the invention provides a method for realizing data service transmission of a remote monitoring terminal, which comprises the following steps:
the PDP session management method is adopted: judging the Running state and the Standby state of the vehicle T-BOX according to the vehicle state;
if the T-Box is in a Running state, maintaining the PDP to be always connected;
if the T-Box is in the Standby state, the PDP connection is released;
in the case of maintaining PDP connection, an uplink IP data transmission buffer retransmission mechanism is adopted:
if the wireless network service is not available, the SMS message of the uplink IP channel cannot be sent to the TSP server, and the T-Box caches the SMS message of the TSP server to be sent;
if the wireless network service exists, the T-BOX sequentially sends the cached SMS messages, and when the SMS messages are sent, an SMS safe transmission mechanism is adopted for encryption.
Further, the method for judging the Running state and the Standby state of the T-BOX of the vehicle in the method of the invention comprises the following steps:
when the vehicle state meets all the following conditions, entering a Standby state;
1) Powering down the vehicle; 2) The whole CAN network is dormant; 3) No remote instruction; 4) No native instructions; 5) No internal timing wake-up setting of the T-BOX;
when the vehicle is powered on or the condition of entering the Standby state cannot be fully met, the T-BOX is in a Running state.
Further, the method for sending the cached information in the method of the invention specifically comprises the following steps: the maximum time of each repetition is 5min, and the maximum number of times of retransmission of each message is 3; the maximum buffer data quantity N, if the maximum buffer data quantity exceeds the data quantity, deleting the earliest buffer data; due to encryption and signing of SMS, there is a segmented situation in uplink SMS, for segmented SMS, if a partial SMS transmission is successful, the partial SMS transmission fails, the complete SMS is buffered.
Further, the method of the present invention comprises the specific steps of:
s1, each service call transmitting interface transmits SMS message;
s2, judging whether the data transmission is successful, if so, distributing the data replied by the server to each application; if not, the SMS message is put into a sending buffer area, N is buffered maximally, and the oldest message is covered if the buffer area is full;
s3, starting a retransmission timer;
s4, after the timer expires, retransmitting the SMS message in the transmission buffer area once, and judging whether the retransmission is successful;
s5, if the retransmission is not successful, selecting the next SMS message, and setting retry=0;
s6, sending the SMS message, and adding 1 to retry; judging whether the data transmission is successful or not;
s7, if the transmission is successful, deleting the SMS message from the transmission buffer; judging whether the transmission buffer area is empty, if so, ending the retransmission and exiting the cycle; if not, returning to the step S4;
s8, if the transmission is unsuccessful, judging whether retry is more than or equal to 3, and if not, returning to the step S6; if yes, return to step S4.
Further, the specific method of the SMS secure transmission mechanism in the method of the invention is as follows:
and (3) downlink: after AES encryption is carried out on SMS message content by the TSP server, ECDSA signature is carried out by adopting a TSP private key; the T-Box adopts a TSP public key to carry out ECDSA signature verification, and after the signature verification is passed, AES decryption is adopted;
and (3) uplink: after the T-Box carries out AES encryption on the SMS message content, a T-Box private key is adopted to carry out ECDSA signature; the TSP adopts a T-Box public key to carry out ECDSA signature verification, and AES decryption is adopted after signature verification is passed.
Furthermore, the method of the invention supports the updating by adopting software upgrading for the signature private key of the T-Box and supports the synchronous updating of the verification public key of the background server.
Further, in the method of the invention, AES encryption and decryption are carried out on the T-Box and the TSP server, and each T-Box is different; the AES transmission key is supported to be updated by disclosing a production line AES key generation interface to a production line; the support production line updates the SMS AES transfer key over this interface.
The invention has the beneficial effects that: the invention discloses a method for realizing data service transmission of a remote monitoring terminal, which comprises the following steps: 1. through PDP session management, namely, according to different states of the parts, different PDP session states are maintained, so that the technical problems that the PDP is kept to be always connected for a long time, network resources are temporarily used, the whole vehicle electric quantity is consumed, the PDP connection is frequently released, and when a user initiates a service again, the response time is reduced due to the need of reconnection, and the user experience is influenced are solved; 2. the method comprises the steps of designing an uplink IP data transmission buffer retransmission mechanism, and solving the problem that in some special scenes, for example, no wireless network service exists, at the moment, an uplink IP channel message cannot be transmitted to a TSP server; 3. and SMS safety transmission design is carried out, so that the communication safety is improved.
Drawings
The invention will be further described with reference to the accompanying drawings and examples, in which:
FIG. 1 is a flow chart of PDP session management according to an embodiment of the present invention;
fig. 2 is a flowchart of an uplink IP data transmission buffer retransmission mechanism according to an embodiment of the present invention;
fig. 3 is an SMS security transmission diagram of an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
As shown in fig. 1, the method for implementing data service transmission of a remote monitoring terminal according to an embodiment of the present invention includes the following steps:
1. the PDP session management method is adopted: judging the Running state and the Standby state of the vehicle T-BOX according to the vehicle state;
(1) When the vehicle state meets the following conditions (condition and), entering a Standby state;
1) Vehicle power down
2) Whole vehicle CAN network dormancy
3) Without remote instruction
4) Without native instructions
5) T-BOX-free internal timing wakeup settings
(2) When the vehicle is electrified or the conditions cannot be fully met, the T-BOX is in a Running state;
if the T-Box is in a Running state, the PDP is kept always connected, the TSP service can be responded quickly, and the user experience is improved.
If the T-Box is in the Standby state, the PDP connection will be released.
2. In the case of maintaining PDP connection, an uplink IP data transmission buffer retransmission mechanism is adopted:
in the case of maintaining the PDP connection, uplink data transmission may be performed with the background, and a background transmission message may be received. The invention designs that under some special scenes, such as no wireless network service, the message of the uplink IP channel cannot be sent to the TSP server, and the T-Box needs to buffer the TSP message to be sent. When the wireless network service is detected, the T-Box sequentially sends the cached information. Once the transmission is successful, the message is deleted from the cache.
If the message transmission fails, the message is put into a buffer memory and retransmitted according to the requirement of the DFM.
1) The maximum time of each repetition is designed to be 5min, and the maximum number of times of each message retransmission is designed to be 3.
2) And designing the maximum cache data quantity N, and deleting the earliest cache data if the maximum cache data quantity is exceeded.
3) There is a segmented situation for upstream SMS due to encryption and signing of SMS. For segmented SMS, if the partial SMS transmission is successful and the partial SMS transmission fails, the complete SMS is cached
The specific steps are shown in fig. 2:
s1, each service call transmitting interface transmits SMS message;
s2, judging whether the data transmission is successful, if so, distributing the data replied by the server to each application; if not, the SMS message is put into a sending buffer area, N is buffered maximally, and the oldest message is covered if the buffer area is full;
s3, starting a retransmission timer;
s4, after the timer expires, retransmitting the SMS message in the transmission buffer area once, and judging whether the retransmission is successful;
s5, if the retransmission is not successful, selecting the next SMS message, and setting retry=0;
s6, sending the SMS message, and adding 1 to retry; judging whether the data transmission is successful or not;
s7, if the transmission is successful, deleting the SMS message from the transmission buffer; judging whether the transmission buffer area is empty, if so, ending the retransmission and exiting the cycle; if not, returning to the step S4;
s8, if the transmission is unsuccessful, judging whether retry is more than or equal to 3, and if not, returning to the step S6; if yes, return to step S4.
3. SMS secure transmission;
the SMS secure transmission scheme is shown in fig. 3.
And (3) downlink: after AES encryption is carried out on the SMS content by the TSP, ECDSA signature is carried out by adopting a TSP private key; and the T-Box adopts a TSP public key to carry out ECDSA signature verification, and after the signature verification is passed, AES decryption is adopted.
And (3) uplink: after the T-Box carries out AES encryption on the SMS content, a T-Box private key is adopted to carry out ECDSA signature; the TSP adopts a T-Box public key to carry out ECDSA signature verification, and AES decryption is adopted after signature verification is passed.
And for the signature private key of the T-Box, supporting updating by adopting software upgrading, and supporting synchronously updating the verification public key of the background server.
For AES encryption and decryption of T-Box and TSP, each T-Box is different. Updating AES transfer keys is supported by exposing a production line AES key generation interface to the production line. The support production line updates the SMS AES transfer key over this interface.
It will be understood that modifications and variations will be apparent to those skilled in the art from the foregoing description, and it is intended that all such modifications and variations be included within the scope of the following claims.
Claims (7)
1. The method for realizing the data service transmission of the remote monitoring terminal is characterized by comprising the following steps:
the PDP session management method is adopted: judging the Running state and the Standby state of the vehicle T-BOX according to the vehicle state;
if the T-Box is in a Running state, maintaining the PDP to be always connected;
if the T-Box is in the Standby state, the PDP connection is released;
in the case of maintaining PDP connection, an uplink IP data transmission buffer retransmission mechanism is adopted:
if the wireless network service is not available, the SMS message of the uplink IP channel cannot be sent to the TSP server, and the T-Box caches the SMS message of the TSP server to be sent;
if the wireless network service exists, the T-BOX sequentially sends the cached SMS messages, and when the SMS messages are sent, an SMS safe transmission mechanism is adopted for encryption.
2. The method for implementing data service transmission of remote monitoring terminal according to claim 1, wherein the method for judging the Running state and the Standby state of the vehicle T-BOX is specifically as follows:
when the vehicle state meets all the following conditions, entering a Standby state;
1) Powering down the vehicle; 2) The whole CAN network is dormant; 3) No remote instruction; 4) No native instructions; 5) No internal timing wake-up setting of the T-BOX;
when the vehicle is powered on or the condition of entering the Standby state cannot be fully met, the T-BOX is in a Running state.
3. The method for implementing data service transmission of remote monitoring terminal according to claim 1, wherein the method for sending the buffered message specifically comprises: the maximum time of each repetition is 5min, and the maximum number of times of retransmission of each message is 3; the maximum buffer data quantity N, if the data quantity is exceeded, deleting the earliest buffer data; due to encryption and signing of SMS, there is a segmented situation in uplink SMS, for segmented SMS, if a partial SMS transmission is successful, the partial SMS transmission fails, the complete SMS is buffered.
4. A method for implementing data service transmission of a remote monitoring terminal according to claim 3, wherein the specific steps of sending the buffered message in the method are as follows:
s1, each service call transmitting interface transmits SMS message;
s2, judging whether the data transmission is successful, if so, distributing the data replied by the server to each application; if not, the SMS message is put into a sending buffer area, N is buffered maximally, and the oldest message is covered if the buffer area is full;
s3, starting a retransmission timer;
s4, after the timer expires, retransmitting the SMS message in the transmission buffer area once, and judging whether the retransmission is successful;
s5, if the retransmission is not successful, selecting the next SMS message, and setting retry=0;
s6, sending the SMS message, and adding 1 to retry; judging whether the data transmission is successful or not;
s7, if the transmission is successful, deleting the SMS message from the transmission buffer; judging whether the transmission buffer area is empty, if so, ending the retransmission and exiting the cycle; if not, returning to the step S4;
s8, if the transmission is unsuccessful, judging whether retry is more than or equal to 3, and if not, returning to the step S6; if yes, return to step S4.
5. The method for implementing data service transmission of remote monitoring terminal according to claim 1, wherein the specific method of SMS security transmission mechanism in the method is as follows:
and (3) downlink: after AES encryption is carried out on SMS message content by the TSP server, ECDSA signature is carried out by adopting a TSP private key; the T-Box adopts a TSP public key to carry out ECDSA signature verification, and after the signature verification is passed, AES decryption is adopted;
and (3) uplink: after the T-Box carries out AES encryption on the SMS message content, a T-Box private key is adopted to carry out ECDSA signature; the TSP adopts a T-Box public key to carry out ECDSA signature verification, and AES decryption is adopted after signature verification is passed.
6. The method according to claim 5, wherein the method supports updating by software upgrade for the signature private key of the T-Box and supports synchronously updating the verification public key of the background server.
7. The method for implementing data service transmission of remote monitoring terminal according to claim 5, wherein in the method, AES encryption and decryption are performed on T-Box and TSP servers, each T-Box is different; the AES transmission key is supported to be updated by disclosing a production line AES key generation interface to a production line; the support production line updates the SMS AES transfer key over this interface.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US9756009B2 (en) * | 2011-11-07 | 2017-09-05 | Telefonaktiebolaget Lm Ericsson (Publ) | Message forwarding among disparate communication networks |
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