CN102984699B - D2D processing method of communication data, equipment and system - Google Patents

Abstract

The present invention provides a D2D communication data processing method, device, and system, wherein the method includes: a source user terminal sends a service request message requesting D2D communication interaction with a target user terminal to a base station, and receives the base station to determine the source user terminal and target user terminal. The random sequence code returned after the D2D communication channel is established between the user terminals, according to the initial key stored in the local SIM card and the first algorithm to calculate the random sequence code to obtain the communication key; apply the second algorithm stored locally and The communication key encrypts the service data to be sent, and sends it to the target user terminal through the D2D communication channel. Through the D2D communication data processing method, device and system provided by the present invention, the encryption processing of the service data based on the D2D communication mode is realized, and the security of the user's communication interaction using the D2D mode is improved.

Description

D2D communication data processing method, device and system

technical field

Embodiments of the present invention relate to the field of communication technologies, and in particular to a D2D communication data processing method, device and system.

Background technique

End-to-end (Device-to-Devicc, D2D) communication is a short-distance communication technology. When the user terminal submits a D2D communication request to the base station, the base station switches the communication mode of the user terminal to the D2D connection mode according to the request. D2D communication can be applied to a variety of communication services, especially short-distance or communication in the same area. Based on the D2D communication mode, data between user terminals can be directly transmitted without passing through the base station. Although compared with the communication service provided by the cell base station, the D2D communication mode reduces the load pressure of the base station, but the security of the communication data is poor.

Contents of the invention

In view of the above-mentioned defects in the prior art, embodiments of the present invention provide a D2D communication data processing method, device and system.

One aspect of the present invention provides a D2D communication data processing method, including:

The source user terminal sends a service request message requesting D2D communication interaction with the target user terminal to the base station, and receives a random sequence code returned by the base station after determining that a D2D communication channel is established between the source user terminal and the target user terminal;

The source user terminal calculates the random sequence code according to the initial key and the first algorithm stored in the local SIM card to obtain the communication key;

The source user terminal applies the locally stored second algorithm and the communication key to encrypt the service data to be sent, and sends it to the target user terminal through the D2D communication channel.

Another aspect of the present invention provides a D2D communication data processing method, including:

After the target user terminal establishes a D2D communication channel with the source user terminal according to the instruction message sent by the base station for instructing D2D communication interaction with the source user terminal, it obtains a random sequence code corresponding to the D2D communication interaction, where , the random sequence code is a random sequence code issued by the base station to the source user terminal for generating a communication key corresponding to D2D communication interaction;

The target user terminal receives service data sent by the source user terminal through the D2D communication channel and encrypted with the communication key;

The target user terminal calculates the random sequence code according to the initial key and the first algorithm stored in the local SIM card to obtain the communication key, and applies the second algorithm and the communication key stored locally Decrypt the business data.

Another aspect of the present invention provides a user terminal, including:

The requesting module is configured to send a service request message requesting D2D communication interaction with the target user terminal to the base station, and receive a random sequence returned by the base station after determining that a D2D communication channel is established between the source user terminal and the target user terminal code;

A processing module, configured to calculate the random sequence code according to the initial key stored in the local SIM card and the first algorithm to obtain the communication key;

An encryption module, configured to apply the locally stored second algorithm and the communication key to encrypt the service data to be sent;

A sending module, configured to send the encrypted service data to the target user terminal through the D2D communication channel.

Another aspect of the present invention provides a user terminal, including:

An acquisition module, configured to acquire a random sequence code corresponding to the D2D communication interaction after establishing a D2D communication channel with the source user terminal according to an indication message sent by the base station for indicating D2D communication interaction with the source user terminal , wherein the random sequence code is the random sequence code used by the base station to the source user terminal for generating a communication key corresponding to the D2D communication interaction;

A receiving module, configured to receive service data sent by the source user terminal through the D2D communication channel and encrypted by applying the communication key;

A decryption module, configured to calculate the random sequence code according to the initial key and the first algorithm stored in the local SIM card to obtain the communication key, and apply the second algorithm and the communication key stored locally Decrypt the business data.

Another aspect of the present invention provides a D2D communication data processing system, including: a base station, a source user terminal and a target user terminal under the control of the base station, wherein the source user terminal is the one provided by the above-mentioned another aspect of the present invention A user terminal, where the target user terminal is the user terminal provided in another aspect of the present invention.

The D2D communication data processing method, device, and system provided by the embodiments of the present invention receive, through the base station, a service request message sent by the source user terminal requesting D2D communication interaction with the target user terminal, and determine the establishment of the connection between the source user terminal and the target user terminal. After the D2D communication channel, a random sequence code is returned to the source user terminal, and the source user terminal calculates the random sequence code according to the initial key stored in the local SIM card and the first algorithm to obtain the communication key, and applies the stored locally The second algorithm and the communication key encrypt the service data to be sent, and send it to the target user terminal through the D2D communication channel. In this way, the encryption processing of the service data based on the D2D communication mode is realized, and the security of the user's communication interaction using the D2D mode is improved.

Description of drawings

FIG. 1 is a flowchart of an embodiment of a D2D communication data processing method of the present invention;

FIG. 2 is a flow chart of another embodiment of the D2D communication data processing method of the present invention;

FIG. 3 is a schematic structural diagram of an embodiment of a user terminal according to the present invention;

FIG. 4 is a schematic structural diagram of another embodiment of a user terminal according to the present invention;

FIG. 5 is a schematic structural diagram of an embodiment of a D2D communication data processing system according to the present invention.

detailed description

Fig. 1 is a flowchart of an embodiment of the D2D communication data processing method of the present invention. As shown in Fig. 1, the method includes:

Step 100, the source user terminal sends a service request message requesting D2D communication interaction with the target user terminal to the base station, and receives a random message returned by the base station after determining that the D2D communication channel between the source user terminal and the target user terminal is established. serial number;

In view of the defect in the prior art that two user terminals A and B, that is, the source user terminal and the target user terminal, have poor communication data security when performing D2D communication, in the D2D communication data processing method proposed in this embodiment, the source user terminal and the target user terminal The same initial key and first algorithm used to generate the D2D communication key are pre-stored in the SIM card of the user terminal, and the same second algorithm used to encrypt service data is stored in the source user terminal and the target user terminal. It should be noted that the source user terminal and the target user terminal may pre-register for the D2D secure communication service with the operator, and obtain the above-mentioned initial key, first algorithm, and second algorithm corresponding to the D2D secure communication between the two. It is worth noting that a user terminal can also perform D2D secure communication services with multiple user terminals as needed. For example, A, B, and C have both registered for D2D secure communication services. The algorithm and the second algorithm, and at least one of the initial key, the first algorithm, and the second algorithm obtained between A and C are different, and the communication and interaction process between A and B and between A and C is similar. Take D2D secure communication between the source user terminal and the target user terminal as an example to illustrate: if the source user terminal sends a service request message to the base station requesting D2D communication interaction with the target user terminal, the service request message includes the source user terminal ID and the target user terminal identifier, the base station parses the received service request message to obtain the source user terminal identifier and the target user terminal identifier, and then queries the terminal location information in the home location register according to the source user terminal identifier and the target user terminal identifier, so as to The preset D2D communication strategy judges whether the D2D communication conditions are met between the source user terminal and the target user terminal, and if so, allocates the channel and power for D2D communication interaction between the source user terminal and the target user terminal, and instructs the source user terminal Establish a D2D communication channel with the target user terminal, when the D2D communication channel between the source user terminal and the target user terminal is established, send an established response to the base station, and the base station confirms that the D2D communication channel between the source user terminal and the target user terminal is established , sending a random sequence code corresponding to the D2D communication interaction to the source user terminal.

Step 101, the source user terminal calculates the random sequence code according to the initial key and the first algorithm stored in the local SIM card to obtain the communication key;

After receiving a random sequence code corresponding to the D2D communication interaction sent by the base station, the source user terminal calculates the random sequence code according to the initial key stored in the local SIM card and the first algorithm to obtain the communication key, specifically: The source user terminal saves the random sequence code in the temporary storage area, and then sends it to the SIM card through the interface with the SIM card, and the SIM card calculates the random sequence code according to its own pre-stored initial key and the first algorithm to obtain the communication key. key, and send the communication key to the source user terminal, and the source user terminal saves the communication key in a temporary storage area.

Step 102, the source user terminal encrypts the service data to be sent by applying the locally stored second algorithm and the communication key, and sends it to the target user terminal through the D2D communication channel.

After the source user terminal obtains the communication key corresponding to the D2D communication interaction generated by the SIM card according to the initial key and the first algorithm, it applies the locally stored second algorithm and the communication key to encrypt the service data to be sent, and Send the encrypted service data to the target user terminal through the established D2D communication channel. Since the base station generates different random sequence codes for each D2D communication interaction, even if the communication key is intercepted in one communication interaction, a new communication key will be regenerated in the next D2D communication interaction, and even if the random sequence code generated by the base station The serial code is intercepted. Since the initial key and the first algorithm are stored in the SIM card of the source user terminal, the security is high, and it is difficult to be cracked to obtain the communication key, thereby ensuring the security of the D2D communication data.

In the D2D communication data processing method provided in this embodiment, the base station receives the service request message sent by the source user terminal requesting D2D communication interaction with the target user terminal, and after determining that the D2D communication channel is established between the source user terminal and the target user terminal, Return a random sequence code to the source user terminal, the source user terminal calculates the random sequence code according to the initial key and the first algorithm stored in the local SIM card to obtain the communication key, and applies the second algorithm and the second algorithm stored locally The communication key encrypts the service data to be sent, and sends it to the target user terminal through the D2D communication channel. In this way, the encryption processing of the service data based on the D2D communication mode is realized, and the security of the user's communication interaction using the D2D mode is improved.

Based on the above embodiments, further, after the source user terminal transmits the encrypted service data through the D2D communication channel and completes the D2D communication interaction with the target user terminal, the method further includes:

The source user terminal sends a communication end message to the base station, so that the base station releases the signaling control resources used for the D2D communication interaction between the source user terminal and the target user terminal according to the communication end message, and at the same time, the source user terminal sends the communication end message to the target user terminal , so that the target user terminal releases the transmission resources used for the D2D communication interaction, thereby improving the utilization rate of system resources and avoiding waste.

Fig. 2 is a flowchart of another embodiment of the D2D communication data processing method of the present invention. As shown in Fig. 2, the method includes:

Step 200: After the target user terminal establishes a D2D communication channel with the source user terminal according to the instruction message sent by the base station for instructing D2D communication interaction with the source user terminal, it obtains a random sequence corresponding to the D2D communication interaction code, wherein the random sequence code is a random sequence code issued by the base station to the source user terminal for generating a communication key corresponding to D2D communication interaction;

In this embodiment, the source user terminal and the target user terminal to perform D2D communication respectively store the same initial key and first algorithm used to generate the communication key in the SIM cards of the respective user terminals, and store the same initial key and the first algorithm in the respective user terminals The second algorithm used to encrypt the same business data is stored. If the source user terminal sends a service request message to the base station requesting D2D communication interaction with the target user terminal, the service request message includes the source user terminal identifier and the target user terminal identifier, the base station parses the received service request message to obtain the source user terminal The terminal ID and the target user terminal ID, and then query the terminal location information in the home location register according to the source user terminal ID and the target user terminal ID, so as to judge whether the source user terminal and the target user terminal meet the D2D requirements according to the preset D2D communication strategy. If the communication conditions are satisfied, the source user terminal and the target user terminal are allocated channels and power for D2D communication interaction, and the source user terminal and the target user terminal are instructed to establish a D2D communication channel, so that the target user terminal transmits the information for An instruction message indicating D2D communication interaction with the source user terminal establishes a D2D communication channel with the source user terminal, and the target user terminal obtains a random sequence code corresponding to the D2D communication interaction, wherein the random sequence code is generated by the source user terminal For the random sequence code used for the communication key corresponding to the D2D communication interaction, there are more than one ways for the target user terminal to obtain the random sequence code, specifically including: the target user terminal receives the random sequence code sent by the base station and corresponds to the D2D communication interaction, Or, the target user terminal receives the random sequence code corresponding to the D2D communication interaction sent by the source user terminal through the D2D communication channel.

Step 201, the target user terminal receives service data sent by the source user terminal through the D2D communication channel and encrypted by applying a communication key corresponding to the D2D communication interaction;

The source user terminal calculates the random sequence code corresponding to the D2D communication interaction sent by the base station according to the initial key stored in its own SIM card and the first algorithm to generate a communication key, and then the source user terminal applies the communication key and stores it locally The second algorithm encrypts the service data to be sent, and sends the encrypted service data to the target user terminal through the established D2D communication channel, so that the target user terminal receives the communication corresponding to the interaction between the source user terminal application and the D2D communication The business data encrypted by the key.

Step 202, the target user terminal calculates the random sequence code according to the initial key stored in the local SIM card and the first algorithm to obtain the communication key, and applies the locally stored second algorithm and the The communication key decrypts the service data.

After receiving the service data encrypted by the source user terminal using the communication key corresponding to the D2D communication interaction, the target user terminal calculates and generates the obtained random sequence code according to the initial key stored in its own SIM card and the first algorithm. communication key, and then the target user terminal applies the second algorithm stored locally and the generated communication key to decrypt the received service data, so as to obtain the information sent by the source user terminal. Since the random sequence code generated by the base station for each D2D communication interaction is different, even if the communication key in one communication interaction is intercepted, a new communication key will be regenerated in the next D2D communication interaction, and even if the communication key generated by the base station The random sequence code is intercepted. Since the initial key and the first algorithm are stored in the SIM card of the target user terminal, the security is high, and it is difficult to be cracked to obtain the communication key, thereby ensuring the security of the D2D communication data.

In the D2D communication data processing method provided in this embodiment, after the target user terminal establishes the D2D communication channel according to the instruction message sent by the base station for instructing the D2D communication interaction with the source user terminal, the random sequence code corresponding to the D2D communication interaction is obtained, Among them, the random sequence code is the random sequence code used by the source user terminal to generate the communication key corresponding to the D2D communication interaction. Finally, calculate the random sequence code according to the initial key and the first algorithm stored in the local SIM card to obtain the communication key, and apply the second algorithm and the communication key stored locally to decrypt the service data. In this way, the encrypted service data based on the D2D communication mode can be decrypted, and the security of the user's communication interaction using the D2D mode is improved.

Those of ordinary skill in the art can understand that all or part of the steps for realizing the above-mentioned method embodiments can be completed by hardware related to program instructions, and the aforementioned program can be stored in a computer-readable storage medium. When the program is executed, the It includes the steps of the above method embodiments; and the aforementioned storage medium includes: ROM, RAM, magnetic disk or optical disk and other various media that can store program codes.

FIG. 3 is a schematic structural diagram of an embodiment of a user terminal of the present invention. As shown in FIG. 3 , the user terminal includes: a request module 11, a processing module 12, an encryption module 13, and a sending module 14, wherein the request module 11 is used to send a request to the base station Send a service request message requesting D2D communication interaction with the target user terminal, and receive the random sequence code returned by the base station after determining that the D2D communication channel between the source user terminal and the target user terminal is established; the processing module 12 is used to store in the local SIM card The initial key and the first algorithm in the random sequence code are calculated to obtain the communication key; the encryption module 13 is used to encrypt the business data to be sent by applying the second algorithm and the communication key stored locally; the sending module 14 uses The encrypted service data is sent to the target user terminal through the D2D communication channel.

For the functions and processing flow of each module in the user terminal provided in this embodiment, refer to the method embodiment shown in FIG. 1 above. The implementation principles and technical effects are similar, and will not be repeated here.

Based on the above embodiment, further, the requesting module 11 is further configured to send a communication end message to the base station, so that the base station releases the signaling control resources used for D2D communication interaction; the sending module 14 is also configured to send the communication to the target user terminal End the message, so that the target UE releases the transmission resource used for D2D communication interaction.

FIG. 4 is a schematic structural diagram of another embodiment of the user terminal of the present invention. As shown in FIG. 4, the user terminal includes: an acquisition module 21, a receiving module 22, and a decryption module 23, wherein the acquisition module 21 is used to After establishing a D2D communication channel with the source user terminal with an instruction message indicating D2D communication interaction with the source user terminal, obtain a random sequence code corresponding to the D2D communication interaction, wherein the random sequence code is issued by the base station to the source user terminal The random sequence code used to generate the communication key corresponding to the D2D communication interaction; the receiving module 22 is used to receive the service data sent by the source user terminal through the D2D communication channel and encrypted with the communication key; the decryption module 23 is used to Calculate the random sequence code according to the initial key and the first algorithm stored in the local SIM card to obtain the communication key, and apply the second algorithm and the communication key stored locally to decrypt the service data. Wherein, the obtaining module 21 is specifically configured to: receive the random sequence code corresponding to the D2D communication interaction sent by the base station, or receive the random sequence code corresponding to the D2D communication interaction sent by the source user terminal through the D2D communication channel.

For the functions and processing flow of each module in the user terminal provided in this embodiment, refer to the method embodiment shown in FIG. 2 above. The implementation principles and technical effects are similar, and will not be repeated here.

Fig. 5 is a schematic structural diagram of an embodiment of the D2D communication data processing system of the present invention. As shown in Fig. 5, the system includes: a base station 1, a source user terminal 2 and a target user terminal 3 under the control of the base station 1, wherein the source user terminal 2 is the user terminal shown in FIG. 3 of the present invention, the target user terminal 3 is the user terminal shown in FIG. 4 of the present invention, and base station 1 is the base station involved in the embodiment shown in the present invention.

For the functions and processing flow of each module in the D2D communication data processing system provided in this embodiment, refer to the method embodiment shown above, and its implementation principles and technical effects are similar, and will not be repeated here.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: it can still be Modifications are made to the technical solutions described in the foregoing embodiments, or equivalent replacements are made to some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims (10)

1. An end-to-end D2D communication data processing method, characterized in that, comprising: The source user terminal sends a service request message requesting D2D communication interaction with the target user terminal to the base station, and receives a random sequence code returned by the base station after determining that a D2D communication channel is established between the source user terminal and the target user terminal; The source user terminal calculates the random sequence code according to the initial key and the first algorithm stored in the SIM card of the source user terminal to obtain a communication key; The source user terminal applies the second algorithm stored in the source user terminal and the communication key to encrypt the service data to be sent, and sends it to the target user terminal through the D2D communication channel. 2. The D2D communication data processing method according to claim 1, characterized in that, after the sending to the target user terminal through the D2D communication channel, the method further comprises: The source user terminal sends a communication end message to the base station, so that the base station releases signaling control resources used for the D2D communication interaction; The source user terminal sends the communication end message to the target user terminal, so that the target user terminal releases the transmission resource used for the D2D communication interaction. 3. An end-to-end D2D communication data processing method, characterized in that, comprising: After the target user terminal establishes a D2D communication channel with the source user terminal according to the instruction message sent by the base station for instructing D2D communication interaction with the source user terminal, it obtains a random sequence code corresponding to the D2D communication interaction, where , the random sequence code is a random sequence code issued by the base station to the source user terminal for generating a communication key corresponding to D2D communication interaction; The target user terminal receives service data sent by the source user terminal through the D2D communication channel and encrypted with the communication key; The target user terminal calculates the random sequence code according to the initial key and the first algorithm stored in the SIM card of the target user terminal to obtain the communication key, and applies the first key stored in the target user terminal The second algorithm and the communication key decrypt the service data. 4. The D2D communication data processing method according to claim 3, wherein said obtaining the random sequence code corresponding to the D2D communication interaction comprises: The target user terminal receives the random sequence code sent by the base station and corresponding to the D2D communication interaction. 5. The D2D communication data processing method according to claim 3, characterized in that the acquiring the random sequence code corresponding to the D2D communication interaction comprises: The target user terminal receives the random sequence code corresponding to the D2D communication interaction sent by the source user terminal through the D2D communication channel. 6. A user terminal, the user terminal being a source user terminal, characterized in that it comprises: The requesting module is configured to send a service request message requesting an end-to-end D2D communication interaction with the target user terminal to the base station, and return after the base station determines that a D2D communication channel is established between the source user terminal and the target user terminal random sequence code; A processing module, configured to calculate the random sequence code according to the initial key and the first algorithm stored in the SIM card of the source user terminal to obtain a communication key; An encryption module, configured to apply the second algorithm stored in the source user terminal and the communication key to encrypt the service data to be sent; A sending module, configured to send the encrypted service data to the target user terminal through the D2D communication channel. 7. The user terminal according to claim 6, characterized in that, The request module is further configured to send a communication end message to the base station, so that the base station releases signaling control resources used for the D2D communication interaction; The sending module is further configured to send the communication end message to the target user terminal, so that the target user terminal releases the transmission resources used for the D2D communication interaction. 8. A user terminal, the user terminal being a target user terminal, characterized in that it comprises: The acquiring module is configured to acquire the information corresponding to the D2D communication interaction after establishing the D2D communication channel with the source user terminal according to the instruction message sent by the base station for indicating the end-to-end D2D communication interaction with the source user terminal. A random sequence code, wherein the random sequence code is a random sequence code issued by the base station to the source user terminal for generating a communication key corresponding to D2D communication interaction; A receiving module, configured to receive service data sent by the source user terminal through the D2D communication channel and encrypted by applying the communication key; A decryption module, configured to calculate the random sequence code according to the initial key stored in the SIM card of the target user terminal and a first algorithm to obtain the communication key, and apply the first key stored in the target user terminal The second algorithm and the communication key decrypt the service data. 9. The user terminal according to claim 8, wherein the acquiring module is specifically used for: receiving the random sequence code corresponding to the D2D communication interaction sent by the base station, or receiving the random sequence code corresponding to the D2D communication interaction sent by the source user terminal through the D2D communication channel. 10. An end-to-end D2D communication data processing system, characterized by comprising: a base station, a source user terminal and a target user terminal under the control of the base station, wherein the source user terminal is as claimed in claim 6 or 7 The user terminal described above, the target user terminal is the user terminal described in claim 8 or 9.