CN105119829B - Data transmission method, device and system - Google Patents

Abstract

The present invention provides a data transmission method, device, and system, wherein the method includes: receiving a first processing result sent by a virtual gateway after processing a first service request, and storing the first processing result in a random access memory, The first service request is sent by the terminal; backup the first processing result in the random access memory to the flash memory; If no, load the first processing result in the flash memory to the random access memory; read the first processing result in the random access memory, and perform processing according to the first processing result. In the data transmission method, device and system of the present invention, when the terminal sends the same service request to the home gateway, the home gateway does not need to send a service request to the virtual gateway every time, thereby reducing signaling overhead.

Description

Data transmission method, device and system

technical field

The present invention relates to communication technology, in particular to a data transmission method, device and system.

Background technique

At this stage, in the deployment scenario of a virtualized gateway, some functions of the home gateway device are performed by the virtual gateway. The terminal sends a service request to the home gateway, and the home gateway forwards the service request to the virtual gateway. The virtual gateway forwards the service to the home gateway. The request is processed, and the processing result is sent to the home gateway, and the home gateway performs subsequent operations such as forwarding or analysis according to the obtained processing result.

However, when the terminal sends the same service request to the home gateway, the home gateway needs to send the service request to the virtual gateway every time, and the virtual gateway will process it and then send the processing result to the home gateway, but this will undoubtedly increase the communication delay. and signaling overhead.

Contents of the invention

The present invention provides a data transmission method, device and system, which are used to solve the problem in the prior art that the data transmission method in the deployment scenario of a virtual gateway increases communication delay and signaling overhead.

The first aspect of the present invention is to provide a data transmission method, including: receiving the first processing result sent by the virtual gateway after processing the first service request, and storing the first processing result in a random access memory, the The first service request is sent by the terminal;

backing up the first processing result in the random access memory to the flash memory;

If the first service request sent again by the terminal is received, it is judged whether there is the first processing result in the random access memory, and if the judgment result is no, then the first processing result in the flash memory is loaded into the random access memory;

Reading the first processing result in the random access memory, and performing processing according to the first processing result.

The second aspect of the present invention also provides a data transmission device, including: a receiving module, configured to receive the first processing result sent by the virtual gateway after processing the first service request, and store the first processing result in random access memory, the first service request is sent by the terminal;

A backup module, configured to back up the first processing result in the RAM to the flash memory;

A judging module, configured to judge whether there is the first processing result in the random access memory when receiving the first service request sent again by the terminal, and if the judging result is no, save the first processing result in the flash memory Loading the processing result into the random access memory;

A reading module, configured to read the first processing result in the random access memory, and perform processing according to the first processing result.

The third aspect of the present invention also provides a data transmission system, including: the above-mentioned data transmission device and a virtual gateway, the virtual gateway is used to receive the first service request sent by the data transmission device, and The service request is processed, a first processing result data packet is generated, and the first processing result is sent to the data transmission device.

It can be seen from the above technical solutions that, with the data transmission method, device and system provided by the present invention, when the terminal sends the same service request to the home gateway, the home gateway does not need to send a service request to the virtual gateway every time, thereby reducing signaling overhead In addition, the present invention sets a two-level storage mode in the home gateway, that is, backs up the processing result of the service request in the flash memory, so that when the same service request sent by the terminal is received again, if the random access memory If the first processing result is erased, the processing result data packet in the flash memory is directly loaded into the RAM, so that there is no need to send the first service request to the virtual gateway, and there is no need to wait for the virtual gateway on the network side to send the first request The processing results are sent back to the home gateway, thereby reducing signaling delay and signaling overhead.

Description of drawings

FIG. 1 is a flowchart of a data transmission method provided by an embodiment of the present invention;

FIG. 2 is a flowchart of a data transmission method provided by another embodiment of the present invention;

FIG. 3 is a flow chart of a data transmission method provided in yet another embodiment of the present invention;

FIG. 4 is a schematic structural diagram of a data transmission device provided by another embodiment of the present invention;

FIG. 5 is a schematic structural diagram of a data transmission device provided by an embodiment of the present invention;

Fig. 6 is a schematic structural diagram of a data transmission system provided by another embodiment of the present invention.

Detailed ways

Embodiment one

This embodiment provides a data transmission method. FIG. 1 is a flow chart of the data transmission method provided by the embodiment of the present invention. Compared with the traditional gateway, the gateway only retains some functions, for example, the remote management function, but the hardware interface of the home gateway remains unchanged compared with the traditional gateway.

As shown in Figure 1, the data transmission method provided in this embodiment includes:

Step 101: Receive a first processing result sent by a virtual gateway after processing a first service request, and store the first processing result in a random access memory, wherein the first service request is sent by a terminal.

Wherein, the virtual gateway is located on the network side, and the virtual gateway in this embodiment can perform some functions of traditional home gateways in the prior art, for example, a dynamic host configuration protocol that assigns IP (Internet Protocol, IP) addresses to mobile phones inside the home DHCP (Dynamic Host Configuration Protocol, DHCP for short) function, dial-up function, etc. Wherein, random access memory, that is, RAM (Random Access Memory, RAM for short) can support charged storage. The first processing result is a result obtained by the virtual gateway performing different processing on the first service request according to its own stored network protocol.

It can be seen that since the virtual gateway performs a part of the functions of the traditional gateway, compared with the traditional home gateway, the home gateway in this embodiment can reduce the CPU (Central Processing Unit, referred to as CPU) due to fewer functions. Main frequency, which can reduce the burden on the home gateway.

Step 102, backing up the first processing result in the RAM to the flash memory.

Wherein, the memory size of the flash memory is smaller than the flash memory size of the traditional home gateway. For example, the home gateway in the prior art performs too many functions, so the Flash size is generally about 16MB, but the home gateway in this application is due to some functions Executed by the virtual gateway, therefore, the memory size of Flash can be greatly reduced. Generally speaking, 8MB is enough. Of course, this is just an example for illustration, and the size of the specific Flash is not limited. It can be seen that, compared with the traditional gateway in the prior art, the hardware requirement of the home gateway in this embodiment is reduced.

Step 103: If the first service request sent again by the terminal is received, it is judged whether there is a first processing result in the random access memory, and if the judgment result is no, the first processing result in the flash memory is loaded into the random access memory.

It should be noted here that since the random access memory does not support live storage, the first processing result in the random access memory is erased due to reasons such as power failure of the home gateway, data update, or service failure.

Therefore, when the user uses the first service again, the home gateway receives the first service request sent again by the terminal, then judges whether there is the first processing result in the RAM, and if there is no first processing result in the RAM, then saves the first processing result in the flash memory The first processing result is loaded into the RAM, so as to provide services faster, so that the home gateway may not send the first service request to the virtual gateway.

Of course, the RAM for backing up the first processing result may also exist independently of the home gateway.

Step 104, read the first processing result in the RAM, and perform processing according to the first processing result.

After the home gateway reads the first processing result in the random access memory, it can send the first processing result to a network processing core (Network processor, NP for short), and the NP performs subsequent functions such as forwarding, unpacking, and labeling.

It can be seen from the above technical solutions that, in the data transmission method provided by the present invention, when the terminal sends the same service request to the home gateway, the home gateway does not need to send a service request to the virtual gateway every time, thereby reducing signaling overhead. In addition, this The invention sets a two-level storage mode in the home gateway, that is, backs up the processing result of the service request in the flash memory, so that when the same service request sent by the terminal is received again, if the first processing result in the random access memory If the result is erased, the processing result data package in the flash memory is directly loaded into the RAM, so that there is no need to send the first service request to the virtual gateway, and there is no need to wait for the virtual gateway on the network side to send the processing result of the first request Back to the home gateway, thereby reducing signaling delay and signaling overhead.

Embodiment two

This embodiment is a further supplementary description of the above embodiment. FIG. 2 is a flowchart of a data transmission method provided by another embodiment of the present invention. As shown in FIG. 2, the method includes:

Step 201, receiving a first service request sent by a terminal.

Step 202, sending the first service request to the virtual gateway, so that the virtual gateway processes the first service request and generates a first processing result.

Step 203, receiving the first processing result sent by the virtual gateway after processing the first service request, and storing the first processing result in the RAM, wherein the first processing result includes at least one of the following results: the same as the first MAC (Media Access Control, referred to as MAC) address table, IP (Internet Protocol, referred to as IP) address allocation table, routing table, quality of service Qos (Quality of Service, referred to as Qos) policy table corresponding to the service.

Wherein, the first service request may be any service request, for example, it may be a request for a terminal to join the network. At this time, the first processing result may be an IP address allocation table in which the virtual gateway assigns a static IP address to the terminal when the terminal joins the network, etc. , For example, when using a mobile phone to join a home router, the mobile phone will obtain a static IP address.

In this embodiment, the first service request is a request to visit and browse the Baidu website as an example for illustration. When the terminal needs to visit Baidu, if the home gateway receives the browsing request from Baidu sent by the terminal, it sends the browsing service request to the virtual gateway. The IP address generates a routing table, that is, the virtual gateway generates a routing table based on the destination IP address and source MAC/IP address. That is, the routing table includes a one-to-one correspondence between the destination IP address and the source MAC/IP address. Alternatively, a MAC address table may also be generated according to the MAC address of Baidu's server and the MAC address of the terminal, that is, the MAC address table includes a one-to-one correspondence between the source MAC address and the destination MAC address. Of course, the first processing result may also be a Qos policy table corresponding to the first service, and no examples are given here.

Step 204, backing up the first processing result in the RAM to the flash memory.

Step 205: If the first service request sent again by the terminal is received, it is judged whether there is a first processing result in the random access memory, and if the judgment result is no, the first processing result in the flash memory is loaded into the random access memory.

When the terminal sends Baidu’s browsing request again, since the random access memory does not support live storage, there will be MAC addresses related to Baidu’s business in the random access memory caused by home gateway power failure, data update, service failure, aging mechanism, etc. table, routing table, etc. are erased, at this time, judge whether there are processing results such as MAC address table, routing table, Qos policy table related to Baidu business in the RAM, if the judgment result is no, the MAC address backed up in the flash memory Tables, routing tables, Qos policy tables, etc. are loaded into random access memory, so that the home gateway may not send the first service request to the virtual gateway.

Step 206, read the first processing result in the RAM, and perform processing according to the first processing result.

The home gateway sends the MAC address table, routing table, Qos policy table, etc. related to Baidu business to the NP, and the NP performs subsequent functions such as forwarding, unpacking, and adding labels.

It can be seen from the above technical solutions that, in the data transmission method provided by the present invention, when the terminal sends the same service request to the home gateway, the home gateway does not need to send a service request to the virtual gateway every time, thereby reducing signaling overhead. In addition, this The invention sets a two-level storage mode in the home gateway, that is, the processing result of the service request is backed up by the flash memory, so that the same service request sent by the terminal can be received again, if the first processing result in the RAM is stored Erase, the processing result data packet in the flash memory is directly loaded into the RAM, so that there is no need to send the first service request to the virtual gateway, and there is no need to wait for the virtual gateway on the network side to send the processing result of the first request back to the home gateway, thereby reducing signaling delay and signaling overhead. In addition, data loss caused by a power outage or failure of the home gateway can also be avoided through the secondary storage mode.

Embodiment three

This embodiment is a further supplementary description of the above embodiment. FIG. 3 is a flow chart of a data transmission method provided by another embodiment of the present invention. As shown in FIG. 3 , the method includes:

Step 301, receiving the first processing result sent by the virtual gateway after processing the first service request, and storing the first processing result in the RAM, wherein the first processing result includes at least one of the following results: the same as the first The MAC address table, IP address allocation table, routing table, and service quality Qos policy table corresponding to the business.

Step 302, backing up the first processing result in the RAM to the flash memory.

Step 301 and step 302 are respectively the same as step 101 and step 102 in the above embodiment, and will not be repeated here.

Step 303: If the first service request sent again by the terminal is received, it is judged whether there is a first processing result in the RAM.

Step 3031, if the judgment result is no, load the first processing result in the flash memory to the random access memory.

Since the random access memory does not support live storage, the first processing result in the random access memory may be erased due to reasons such as power failure of the home gateway, data update, or service failure. At this point, if it is determined that there is no first processing result in the random access memory, the first processing result in the flash memory is loaded into the random access memory.

Step 3032, if the judgment result is yes, read the first processing result in the RAM, and perform processing according to the first processing result.

If the home gateway does not access other services after accessing the first service, the first processing result should still be stored in the RAM. Therefore, when the home gateway receives the first service request sent again by the terminal, if the first processing result exists in the random access memory, it reads the first processing result in the random access memory.

Step 304, read the first processing result in the RAM, and perform processing according to the first processing result.

Step 304 is consistent with step 206 or step 104 and will not be repeated here.

It can be seen from the above technical solutions that the data transmission method provided by the present invention sets a two-level storage mode in the home gateway, that is, the flash memory backs up the processing results of the service requests, so that the same data sent by the terminal can be received again. When a business request is made, if the first processing result in the random access memory is erased, directly load the processing result data package in the flash memory to the random access memory; if the first processing result exists in the random access memory, directly load the first processing result in the random access memory. Processing results, so that there is no need to send the first service request to the virtual gateway, and there is no need to wait for the virtual gateway on the network side to send the processing result of the first request back to the home gateway, thereby reducing signaling delay and signaling overhead.

Embodiment Four

This embodiment provides a data transmission device. FIG. 4 is a schematic structural diagram of a data transmission device provided by another embodiment of the present invention, which is used to implement the data transmission method in Embodiment 1. As shown in FIG. 4, the The data transmission device is located at the user side, for example, it may be a home gateway. As shown in FIG. 4 , the data transmission device includes: a receiving module receiving module 401 , a backup module 402 , a judging module 403 and a reading module 404 .

Wherein, the receiving module 401 is configured to receive the first processing result sent by the virtual gateway after processing the first service request, and store the first processing result in the RAM, where the first service request is sent by the terminal.

Specifically, the virtual gateway is located on the network side, and the virtual gateway in this embodiment can perform some functions of the data transmission device in the prior art, for example, a dynamic host that assigns IP (Internet Protocol, IP) addresses to mobile phones in the home Configuration protocol DHCP (Dynamic Host Configuration Protocol, DHCP for short) function, dial-up function, etc. Wherein, random access memory, that is, RAM (Random Access Memory, RAM for short) can support charged storage. The first processing result is a result obtained by the virtual gateway performing different processing on the first service request according to its own stored network protocol.

It can be seen that since the virtual gateway performs a part of the functions of the data transmission device in the prior art, compared with the traditional data transmission device, the data transmission device of this embodiment can reduce the CPU ( Central Processing Unit (referred to as CPU) main frequency, thereby reducing the burden on the data transmission device.

The backup module 402 is connected to the receiving module 401, and can acquire the first processing result received by the receiving module 401. Specifically, the backup module 402 is used for backing up the first processing result in the RAM to the flash memory.

Wherein, the memory size of the flash memory is smaller than the flash memory size of the traditional data transmission device. For example, the data transmission device in the prior art performs too many functions, so the Flash size is generally about 16MB, but the data transmission device in the present application Since some functions are performed by the virtual gateway, the memory size of Flash can be greatly reduced. Generally speaking, 8MB is enough. Of course, this is just an example for illustration, and the size of the specific Flash is not limited. It can be seen that, compared with the data transmission device in the prior art, the hardware requirement of the data transmission device in this embodiment is reduced.

The judging module 403 is respectively connected with the receiving module 401 and the backup module 402, and is used for judging whether there is the first processing result in the random access memory when receiving the first service request sent again by the terminal, and if the judging result is no, then save the first processing result in the flash memory. The first processing result of is loaded into random access memory.

It should be noted here that since the random access memory does not support live storage, the first processing result in the random access memory is erased due to reasons such as power failure of the data transmission device, data update, or service failure.

Therefore, when the user uses the first service again, the data transmission device receives the first service request sent again by the terminal, and the judging module 403 judges whether there is the first processing result in the RAM, and if there is no first processing result in the RAM, then The first processing result in the flash memory is loaded into the RAM, so as to provide services faster, so that the data transmission device may not send the first service request to the virtual gateway.

Of course, the RAM for backing up the first processing result may also exist independently of the data transmission device.

The reading module 404 is connected with the backup module 402, and the reading module 404 is used to read the first processing result in the random access memory, and perform processing according to the first processing result.

Specifically, after reading the first processing result in the RAM, the reading module 404 can send the first processing result to a network processing core (Network processor, NP for short), and the NP performs subsequent forwarding, unpacking, Add tags and more.

It can be seen from the above technical solutions that, with the data transmission device provided by the present invention, when the terminal sends the same service request to the data transmission device, the data transmission device does not need to send a service request to the virtual gateway every time, thereby reducing signaling overhead. , the present invention sets a two-level storage mode in the data transmission device, that is, backs up the processing result of the service request in the flash memory, so that when the same service request sent by the terminal is received again, if the random access memory When the first processing result is erased, the processing result data packet in the flash memory is directly loaded into the random access memory, so that there is no need to send the first service request to the virtual gateway, and there is no need to wait for the virtual gateway on the network side to send the first request to the virtual gateway. The processing result is sent back to the data transmission device, thereby reducing signaling delay and signaling overhead.

Embodiment five

This embodiment is a further supplementary description of the above embodiments. 5 is a schematic structural diagram of a data transmission device provided by an embodiment of the present invention, which is used to implement the data transmission method of the second embodiment above. The data transmission device in this embodiment is located at the user side, for example, it may be a home gateway. As shown in FIG. 5 , the data transmission device includes: a receiving module 501 , a backup module 502 , a judging module 503 , a reading module 504 and a sending module 505 .

Wherein, the functions of the receiving module 501, the backup module 502, and the judging module 503 are the same as those of the receiving module 401, the backup module 402, and the judging module 403 in Embodiment 1, and will not be repeated here.

The receiving module 501 is connected to the sending module 505, and the receiving module 501 is also configured to receive the first service request sent by the terminal, so that the sending module 505 sends the first service request to the virtual gateway.

The sending module 505 is configured to send the first service request to the virtual gateway, so that the virtual gateway processes the first service request and generates a first processing result.

Wherein, the first processing result includes at least one of the following results: a MAC (Media Access Control, referred to as MAC) address table corresponding to the first service, an IP (Internet Protocol, referred to as IP) address allocation table, a routing table, and a quality of service Qos (Quality of Service, Qos for short) policy table.

Wherein, the first service request may be any service request, for example, it may be a request for a terminal to join the network. At this time, the first processing result may be an IP address allocation table in which the virtual gateway assigns a static IP address to the terminal when the terminal joins the network, etc. , For example, when using a mobile phone to join a home router, the mobile phone will obtain a static IP address.

Different from the above-mentioned embodiments, the reading module 504 in this embodiment is also used to determine whether there is a first processing result in the random access memory when receiving the first service request sent again by the terminal. If there is a first processing result, read the first processing result in the RAM and perform processing according to the first processing result.

Specifically, if the user does not access other services after accessing the first service, the first processing result should still be stored in the RAM at this moment. Therefore, when the data transmission device receives the first service request sent again by the terminal, if the first processing result exists in the random access memory, it reads the first processing result in the random access memory.

It can be seen from the above technical solutions that the data transmission device provided by the present invention sets a two-level storage mode in the data transmission device, that is, the processing result of the service request is backed up by the flash memory, so that the same data sent by the terminal can be received again. When a business request is made, if the first processing result in the random access memory is erased, directly load the processing result data package in the flash memory to the random access memory; if there is the first processing result in the random access memory, directly load the second processing result in the random access memory There is no need to send the first service request to the virtual gateway, and there is no need to wait for the virtual gateway on the network side to send the processing result of the first request back to the data transmission device, thereby reducing signaling delay and signaling overhead .

Embodiment six

This embodiment provides a data transmission system. FIG. 6 is a schematic structural diagram of a data transmission system provided by another embodiment of the present invention. As shown in FIG. 6, the system includes: a data transmission device 1 and a virtual gateway 2, and a virtual gateway 2 It is used to receive the first service request sent by the data transmission device 1, process the first service request, generate a first processing result, and send the first processing result to the data transmission device.

The virtual gateway 2 in this embodiment can perform a part of the functions of the data transmission device in the prior art. Therefore, compared with the traditional data transmission device, the data transmission device 1 in this embodiment has fewer functions, so it can The main frequency of the CPU is reduced, thereby reducing the burden on the data transmission device 1 .

Wherein, the first processing result includes at least one of the following results: a MAC address table corresponding to the first service, an IP address allocation table, a routing table, and a Qos policy table.

The data transmission device 1 can perform the function of any data transmission device provided in the above-mentioned embodiments, and the principle thereof will not be repeated here.

The first service request may be any service request, for example, it may be a request for a terminal to join the network. At this time, the first processing result may be an IP address allocation table in which the virtual gateway assigns a static IP address to the terminal when the terminal joins the network, for example , when using a mobile phone to join the home router, the mobile phone will obtain a static IP address.

In this embodiment, the first service request is a request to visit and browse the Baidu website as an example for illustration. When the terminal needs to visit Baidu, if the data transmission device 1 receives the browsing request of Baidu sent by the terminal, it sends the browsing service request to the virtual gateway 2, and the virtual gateway 2 uses Baidu's IP address and the terminal's MAC address Or the static IP address of the terminal generates a routing table, that is, the virtual gateway 2 generates a routing table according to the destination IP address and the source MAC/IP address, that is, the routing table includes the one-to-one correspondence between the destination IP address and the source MAC/IP address. Alternatively, a MAC address table may also be generated according to the MAC address of Baidu's server and the MAC address of the terminal, that is, the MAC address table includes a one-to-one correspondence between the source MAC address and the destination MAC address. Of course, the first processing result may also be a Qos policy table corresponding to the first service, and no examples are given here.

After the virtual gateway 2 generates the first processing result, the virtual gateway 2 sends the first processing result to the data transmission device 1. After the data transmission device 1 receives the first processing result, it can refer to the data transmission method provided in the above-mentioned embodiment The operation steps are not repeated here.

It can be seen from the above technical solutions that in the data transmission system provided by the present invention, the virtual gateway 2 performs part of the functions of the data transmission device 1, so the main frequency of the CPU of the data transmission device 1 can be reduced, thereby reducing the burden on the data transmission device 1, and The data transmission system of the present invention sets a two-level storage mode in the data transmission device 1, that is, the processing result of the service request is backed up by the flash memory, so that when the same service request sent by the terminal is received again, if random The first processing result in the memory is erased, and the processing result data package in the flash memory is directly loaded to the random access memory. If there is the first processing result in the random access memory, then the first processing result in the random access memory is directly loaded, so that The first service request is sent to the virtual gateway 2, and there is no need to wait for the virtual gateway 2 on the network side to send the processing result of the first request back to the data transmission device 1, thereby reducing signaling delay and signaling overhead.

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

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention, rather than limiting 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 is still possible to modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the technical solutions of the various embodiments of the present invention. scope.

Claims (6)

1. A data transmission method, characterized in that, comprising: receiving a first processing result sent by the virtual gateway after processing the first service request, and storing the first processing result in a random access memory, where the first service request is sent by a terminal; backing up the first processing result in the random access memory to the flash memory; If the first service request sent again by the terminal is received, it is judged whether there is the first processing result in the random access memory, and if the judgment result is no, then the first processing result in the flash memory is loaded into the random access memory; reading the first processing result in the RAM, and performing processing according to the first processing result; If it is determined that the first processing result exists in the random access memory, read the first processing result in the random access memory, and perform processing according to the first processing result. 2. The data transmission method according to claim 1, wherein the first processing result includes at least one of the following results: a MAC address table corresponding to the first service, an IP address allocation table, a routing table, Qos policy table. 3. The data transmission method according to any one of claims 1-2, characterized in that, before receiving the first processing result sent by the virtual gateway after processing the first service request, further comprising: receiving the first service request sent by the terminal; Sending the first service request to the virtual gateway, so that the virtual gateway processes the first service request and generates a first processing result. 4. A data transmission device, characterized in that, comprising: The receiving module is configured to receive the first processing result sent by the virtual gateway after processing the first service request, and store the first processing result in a random access memory, where the first service request is sent by the terminal; A backup module, configured to back up the first processing result in the RAM to the flash memory; A judging module, configured to judge whether there is the first processing result in the random access memory when receiving the first service request sent again by the terminal, and if the judging result is no, save the first processing result in the flash memory Loading the processing result into the random access memory; A reading module, configured to read the first processing result in the random access memory, and perform processing according to the first processing result; The reading module is further configured to read the first processing result in the random access memory when it is determined that the first processing result exists in the random access memory, and perform processing according to the first processing result. 5. The data transmission device according to claim 4, characterized in that, The receiving module is configured to receive the first service request sent by the terminal; Also includes: A sending module, configured to send the first service request to the virtual gateway, so that the virtual gateway processes the first service request and generates a first processing result. 6. A data transmission system, characterized in that it comprises the data transmission device according to claim 4 or 5 and a virtual gateway, the virtual gateway is used to receive the first service request sent by the data transmission device, and to The first service request is processed, a first processing result is generated, and the first processing result is sent to the data transmission device.