CN114710543A - 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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- CN114710543A CN114710543A CN202210315179.4A CN202210315179A CN114710543A CN 114710543 A CN114710543 A CN 114710543A CN 202210315179 A CN202210315179 A CN 202210315179A CN 114710543 A CN114710543 A CN 114710543A
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- 230000005540 biological transmission Effects 0.000 title claims abstract description 46
- 238000000034 method Methods 0.000 title claims abstract description 38
- 238000012544 monitoring process Methods 0.000 title claims abstract description 14
- 230000007246 mechanism Effects 0.000 claims abstract description 12
- 238000007726 management method Methods 0.000 claims abstract description 6
- 238000012795 verification Methods 0.000 claims description 15
- 238000004519 manufacturing process Methods 0.000 claims description 9
- 238000013467 fragmentation Methods 0.000 claims description 4
- 238000006062 fragmentation reaction Methods 0.000 claims description 4
- 230000001174 ascending effect Effects 0.000 claims description 3
- 230000008569 process Effects 0.000 claims description 3
- 238000011144 upstream manufacturing Methods 0.000 claims description 3
- 238000004891 communication Methods 0.000 abstract description 5
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005059 dormancy Effects 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
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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
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- Engineering & Computer Science (AREA)
- Computer Security & Cryptography (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
The invention discloses a method for realizing data service transmission of a remote monitoring terminal, which comprises the following steps: adopting a PDP session management method: judging the Running state and the Standby state of the T-BOX of the vehicle according to the state of the vehicle; if the T-Box is in a Running state, keeping the PDP normally connected; if the T-Box is in the Standby state, the PDP connection is released; under the condition of maintaining PDP connection, an uplink IP data transmission buffer retransmission mechanism is adopted: if no wireless network service exists, the SMS message of the uplink IP channel cannot be sent to the TSP server at the moment, and the T-Box caches the SMS message of the TSP server to be sent; if the wireless network service exists, the T-BOX sends the cached SMS message in sequence, and the SMS message is encrypted by adopting an SMS secure transmission mechanism when being sent. The invention can intelligently control the PDP session management, improve the utilization rate of network resources and save the electric quantity of the whole vehicle; the uplink IP data sending caching mechanism is adopted, the reliability of message sending is guaranteed, and the SMS safe transmission is adopted, so that the communication safety is improved.
Description
Technical Field
The invention relates to the technical field of automobile intelligent control, in particular to a method for realizing data service transmission of a remote monitoring terminal.
Background
In the prior art, the connection of a vehicle to a network does not distinguish the working state of the vehicle or the T-BOX. The connection state to the PDP has the following two disadvantages: 1. and the PDP is kept connected for a long time, network resources are temporarily used, and the electric quantity of the whole vehicle is consumed. 2. The PDP connection is frequently released, so that when the user initiates the service again, reconnection is required to reduce the response time, which affects the user experience.
In addition, in the prior art, a single SMS safe transmission scheme is not adopted, only the SMS safe communication of an operator is relied on, and only the SMS safe communication of the operator is relied on, so that the SMS safe communication system is easy to crack in batches. For the segmented SMS, if part of SMS is successfully sent and part of SMS is failed to send, only the failed SMS is cached, which easily causes errors in background data reassembly and parsing.
Disclosure of Invention
The technical problem to be solved by the present invention is to provide a method for implementing data service transmission of a remote monitoring terminal, aiming at the defects in the prior art.
The technical scheme adopted by the invention for solving the technical problem is as follows:
the invention provides a method for realizing data service transmission of a remote monitoring terminal, which comprises the following steps:
adopting a PDP session management method: judging the Running state and the Standby state of the T-BOX of the vehicle according to the state of the vehicle;
if the T-Box is in a Running state, keeping the PDP normally connected;
if the T-Box is in the Standby state, the PDP connection is released;
under the condition of maintaining PDP connection, an uplink IP data transmission buffer retransmission mechanism is adopted:
if no wireless network service exists, the SMS message of the uplink IP channel cannot be sent to the TSP server at the moment, and the T-Box caches the SMS message of the TSP server to be sent;
if the wireless network service exists, the T-BOX sends the cached SMS messages in sequence, and when the SMS messages are sent, the SMS safe transmission mechanism is adopted for encryption.
Further, the method for judging Running state and Standby state of the vehicle T-BOX in the method of the invention specifically comprises the following steps:
when the vehicle state meets all the following conditions, entering a Standby state;
1) powering off the vehicle; 2) the CAN network of the whole vehicle is dormant; 3) no remote instruction; 4) no native instruction; 5) no T-BOX internal timing awakening setting;
when the vehicle is powered on or the conditions for entering the Standby state cannot be completely met, the T-BOX is in the Running state.
Further, the method for sending the cached message in the method of the present invention specifically includes: the maximum time of each repetition is 5min, and the maximum number of times of retransmission of each message is 3; the maximum cache data volume N is obtained, and if the data volume exceeds the data volume, the earliest cache data is deleted; due to encryption and signature of the SMS, there is a fragmentation situation in the upstream service SMS, and for the fragmentation SMS, if part of the SMS is successfully sent and part of the SMS is failed to be sent, the complete SMS is cached.
Further, the method of the present invention specifically includes the following steps:
s1, each service calls the sending interface to send the SMS message;
s2, judging whether the data sending is successful, if so, distributing the data replied by the server to each application; if not successful, the SMS message is put into a sending buffer area, N messages are cached at the maximum, and the oldest message is covered when the SMS message is full;
s3, starting a retransmission timer;
s4, after the timer expires, retransmitting the SMS message in the sending buffer once, and judging whether the retransmission is successful;
s5, if not, selecting the next SMS message and setting retry to 0;
s6, sending the SMS message and adding 1 to retry; judging whether the data transmission is successful;
s7, if the sending is successful, deleting the SMS message from the sending buffer; judging whether the sending buffer area is empty, if so, ending retransmission and exiting circulation; if not, returning to the step S4;
s8, if the transmission is unsuccessful, judging whether retry is more than or equal to 3, if not, returning to the step S6; if yes, the process returns to step S4.
Further, the specific method of the SMS secure transmission mechanism in the method of the present invention is:
descending: after AES encryption is carried out on SMS message contents 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 AES is adopted to decrypt after signature verification is passed;
ascending: after the T-Box carries out AES encryption on the SMS message content, an ECDSA signature is carried out by adopting a T-Box private key; and the TSP adopts a T-Box public key to carry out ECDSA signature verification, and AES is adopted to decrypt after the signature verification is passed.
Furthermore, the method of the invention supports the updating by 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.
Furthermore, in the method, for the AES encryption and decryption of the T-Box and the TSP server, each T-Box is different; the method comprises the steps that a production line AES key generation interface is disclosed to a production line, and updating of an AES transmission key is supported; the support production line updates the SMS AES transmission key through the interface.
The invention has the following beneficial effects: 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 different PDP session states are kept according to different states of parts, the technical problems that the response time is reduced and the user experience is influenced because reconnection is needed when a user initiates a service again because network resources are temporarily used, the electric quantity of the whole vehicle is consumed and PDP connection is frequently released because the PDP is kept connected frequently for a long time are solved; 2. an uplink IP data sending cache retransmission mechanism is designed, and the problem that the message of an uplink IP channel cannot be sent to a TSP server in some special scenes, such as no wireless network service, is solved; 3. and SMS safe transmission design is carried out, and 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 a diagram of SMS secure transmission according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
As shown in fig. 1, a method for implementing data service transmission of a remote monitoring terminal according to an embodiment of the present invention includes the following steps:
the method for managing the PDP session comprises the following steps: judging the Running state and the Standby state of the T-BOX of the vehicle according to the state of the vehicle;
(1) when the vehicle state meets the following conditions (condition and), entering a Standby state;
1) vehicle power off
2) Complete vehicle CAN network dormancy
3) Without remote instruction
4) No native instruction
5) T-BOX FREE INTERNAL TIME WAKE-UP SETTING
(2) When the vehicle is powered on or the conditions can not be completely met, the T-BOX is in a Running state;
if the T-Box is in a Running state, the PDP is 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.
Secondly, under the condition of maintaining PDP connection, an uplink IP data sending buffer retransmission mechanism is adopted:
under the condition of maintaining the PDP connection, uplink data transmission can be carried out with the background, and messages sent by the background are received. The invention is designed in some special scenes, for example, no wireless network service exists, at this time, the message of the uplink IP channel cannot be sent to the TSP server, and the T-Box needs to cache the TSP message to be sent. And when the wireless network service is detected, the T-Box sequentially transmits the cached messages. Once the transmission is successful, the message is deleted from the buffer.
If the message transmission fails, the message is put into a cache 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 volume N, and deleting the earliest cache data if the data volume is exceeded.
3) There is a fragmented situation for upstream traffic SMS due to encryption and signing of SMS. For segmented SMS, if partial SMS transmission is successful and partial SMS transmission is failed, the complete SMS is cached
The specific steps are shown in figure 2:
s1, each service calls the sending interface to send the SMS message;
s2, judging whether the data sending is successful, and if the data sending is successful, distributing the data replied by the server to each application; if not successful, the SMS message is put into a sending buffer area, N messages are cached at the maximum, and the oldest message is covered when the SMS message is full;
s3, starting a retransmission timer;
s4, after the timer is expired, retransmitting the SMS message in the sending buffer once, and judging whether the retransmission is successful;
s5, if not, selecting the next SMS message and setting retry to 0;
s6, sending the SMS message and adding 1 to retry; judging whether the data transmission is successful;
s7, if the sending is successful, deleting the SMS message from the sending buffer; judging whether the sending buffer area is empty, if so, ending retransmission and exiting circulation; if not, returning to the step S4;
s8, if the transmission is unsuccessful, judging whether retry is more than or equal to 3, if not, returning to the step S6; if yes, the process returns to step S4.
Thirdly, SMS safe transmission;
the SMS secure transmission scheme is shown in fig. 3.
Descending: after AES encryption is carried out on SMS contents by TSP, ECDSA signature is carried out by adopting a TSP private key; and the T-Box adopts the TSP public key to carry out ECDSA signature verification, and adopts AES to decrypt after the signature verification is passed.
Ascending: after the T-Box carries out AES encryption on the SMS content, an ECDSA signature is carried out by adopting a T-Box private key; and the TSP adopts a T-Box public key to carry out ECDSA signature verification, and AES decryption is adopted after the signature verification is passed.
And for the signature private key of the T-Box, software upgrading is supported for updating, and the verification public key of the background server is supported for synchronously updating.
For AES encryption and decryption of T-Box and TSP, each T-Box is different. And the updating of the AES transmission key is supported by disclosing the AES key generation interface of the production line to the production line. The support production line updates the SMS AES transmission key through the interface.
It will be understood that modifications and variations can be made by persons skilled in the art in light of the above teachings and all such modifications and variations are intended to be included within the scope of the invention as defined in the appended claims.
Claims (7)
1. A method for realizing data service transmission of a remote monitoring terminal is characterized by comprising the following steps:
adopting a PDP session management method: judging the Running state and the Standby state of the T-BOX of the vehicle according to the state of the vehicle;
if the T-Box is in a Running state, keeping the PDP normally connected;
if the T-Box is in the Standby state, the PDP connection is released;
under the condition of maintaining PDP connection, an uplink IP data transmission buffer retransmission mechanism is adopted:
if no wireless network service exists, the SMS message of the uplink IP channel cannot be sent to the TSP server at the moment, and the T-Box caches the SMS message of the TSP server to be sent;
if the wireless network service exists, the T-BOX sends the cached SMS messages in sequence, and when the SMS messages are sent, the SMS safe transmission mechanism is adopted for encryption.
2. The method for implementing data service transmission of the remote monitoring terminal according to claim 1, wherein the method for determining Running state and Standby state of the vehicle T-BOX in the method specifically comprises:
when the vehicle state meets all the following conditions, entering a Standby state;
1) powering off the vehicle; 2) the CAN network of the whole vehicle is dormant; 3) no remote instruction; 4) no native instruction; 5) no T-BOX internal timing awakening setting;
when the vehicle is powered on or the conditions for entering the Standby state cannot be completely met, the T-BOX is in the Running state.
3. The method for implementing data service transmission of a remote monitoring terminal according to claim 1, wherein the method for sending the cached message specifically comprises: the maximum time of each repetition is 5min, and the maximum number of times of each message retransmission is 3; the maximum cache data volume N is obtained, and if the data volume exceeds the data volume, the earliest cache data is deleted; due to encryption and signature of the SMS, there is a fragmentation situation in the upstream service SMS, and for the fragmentation SMS, if part of the SMS is successfully sent and part of the SMS is failed to be sent, the complete SMS is cached.
4. The method for implementing data service transmission of a remote monitoring terminal according to claim 3, wherein the specific steps of sending the cached message in the method are as follows:
s1, each service calls the sending interface to send the SMS message;
s2, judging whether the data sending is successful, and if the data sending is successful, distributing the data replied by the server to each application; if not successful, the SMS message is put into a sending buffer area, N messages are cached at the maximum, and the oldest message is covered when the SMS message is full;
s3, starting a retransmission timer;
s4, after the timer is expired, retransmitting the SMS message in the sending buffer once, and judging whether the retransmission is successful;
s5, if not, selecting the next SMS message and setting retry to 0;
s6, sending the SMS message and adding 1 to retry; judging whether the data transmission is successful;
s7, if the sending is successful, deleting the SMS message from the sending buffer; judging whether the sending buffer area is empty, if so, ending retransmission and exiting circulation; if not, returning to the step S4;
s8, if the transmission is unsuccessful, judging whether retry is more than or equal to 3, if not, returning to the step S6; if yes, the process returns 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 secure transmission mechanism in the method is as follows:
descending: after AES encryption is carried out on SMS message contents 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 AES is adopted to decrypt after signature verification is passed;
ascending: after the T-Box carries out AES encryption on the SMS message content, an ECDSA signature is carried out by adopting a T-Box private key; and the TSP adopts a T-Box public key to carry out ECDSA signature verification, and AES is adopted to decrypt after the signature verification is passed.
6. The method for realizing data service transmission of the remote monitoring terminal according to claim 5, wherein the method supports updating by software upgrade for the signature private key of the T-Box and supports updating the verification public key of the background server synchronously.
7. The method as claimed in claim 5, wherein the T-Box and TSP server are different for AES encryption and decryption in the method; the method comprises the steps that a production line AES key generation interface is disclosed to a production line, and updating of an AES transmission key is supported; the support production line updates the SMS AES transmission key through the interface.
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| CN202210315179.4A CN114710543B (en) | 2022-03-28 | 2022-03-28 | Method for realizing data service transmission of remote monitoring terminal |
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2022
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