Terminal node, switching node and communication system and method

Abstract

The invention discloses a terminal node, a switching node and a communication system and method. The switching node is used for completing information exchange between any two terminal nodes in a network, and comprises a receiving module used for receiving source data packets from the two terminal nodes; the mutual scrambling module is used for performing mutual scrambling processing on the received source data packets from the two terminal nodes; and the sending module is used for respectively sending the data packets subjected to mutual scrambling processing to the two terminal nodes. According to the invention, the exchange node carries out mutual scrambling operation and processing on the data packets of the two terminal nodes and then forwards the data packets, which is equivalent to mutual encryption of data sent by the two terminal nodes in real time, so that the communication security is improved.

Description

Technical Field

[0001] This invention relates to a terminal node, a switching node, and a communication system and method, particularly a method that improves communication security by performing scrambling and processing on data sent by two terminal nodes at the switching node before forwarding it, belonging to the field of communication technology. Background Technology

[0002] A communication network consists of terminal nodes, transmission lines, and switching nodes. Terminal nodes convert user information into signals transmitted over the channel; transmission lines are the channels, the pathways for information transmission; switching nodes facilitate information exchange between any two users within the network. They have processing and forwarding functions, forwarding received data packets to the correct destination and providing various services such as information security and network monitoring. The channel from the switching node to the terminal node is called the forward channel, and the channel from the terminal node to the switching node is called the reverse channel. Communication between two terminal nodes in a communication network is achieved through forwarding by the switching node. Specifically, terminal node 1 sends user 1's data to the switching node via the reverse channel. The switching node receives the data sent by terminal node 1 and, according to a certain forwarding strategy, sends the data to terminal node 2 via one forward channel. Terminal node 2 sends user 2's data to the switching node via the reverse channel. The switching node receives the data sent by terminal node 2 and, according to a certain forwarding strategy, sends the data to terminal node 1 via another forward channel. In this traditional communication method, the switching node only forwards the data sent by the terminal nodes and does not change the content of the data itself. If the data transmitted through the forward channel is eavesdropped on or intercepted by a third-party device, the intercepted data becomes the actual data sent by the terminal node. Furthermore, since the data sent by the switching node to the two terminal nodes is different, two forward channels are required. Summary of the Invention

[0003] The purpose of this invention is to provide a terminal node, a switching node, and a communication system and method.

[0004] To achieve the above objectives, the present invention provides a switching node communication method, wherein the switching node is used to complete information exchange between any two terminal nodes within a network, and the method includes the following steps:

[0005] Receive source data packets from two terminal nodes;

[0006] The received source data packets from the two terminal nodes are scrambled together.

[0007] The scrambled data packets are then sent back to the two terminal nodes respectively.

[0008] To achieve the above objectives, the present invention provides a terminal node communication method, wherein the terminal node is used to exchange information with any other terminal node in the network through a switching node, and the method includes the following steps:

[0009] Send the source data packet to the switching node so that it can be sent to another terminal node through the switching node;

[0010] The receiving switching node performs scrambling on the source data packet;

[0011] Use the source data packet to descramble the scrambled data packet;

[0012] After descrambling, the source data packet sent by the other terminal node is obtained.

[0013] To achieve the above objectives, the present invention provides a switching node, which is used to complete information exchange between any two terminal nodes within a network, and the switching node includes:

[0014] The receiving module is used to receive source data packets from two terminal nodes;

[0015] The scrambling module is used to scramble the source data packets received from two terminal nodes.

[0016] The sending module is used to send the scrambled data packets back to the two terminal nodes respectively.

[0017] Furthermore, the switching nodes include, but are not limited to, terrestrial mobile communication base stations, satellite communication gateway stations, or on-orbit satellites with on-board processing capabilities.

[0018] Furthermore, it also includes a scrambling buffer module for caching data packets received by the receiving module.

[0019] To achieve the above objectives, the present invention provides a terminal node, which is used to exchange information with any other terminal node in the network through a switching node, and the terminal node includes:

[0020] The sending module is used to send source data packets to the switching node so that they can be sent to another terminal node through the switching node;

[0021] The receiving module is used to receive the data packets after the switching node has scrambled the source data packets;

[0022] The descrambling module uses the source data packet to descramble the data packet after mutual scrambling; after descrambling, the source data packet sent by the other terminal node is obtained.

[0023] Furthermore, it also includes:

[0024] The data splitting and packaging module is used to split and package user data.

[0025] The sending cache module is used to cache the segmented data packets;

[0026] The descrambling and caching module is used to cache the sent data packets;

[0027] After receiving the scrambling data packet, the descrambling module extracts the data packet sent from the descrambling cache module and performs descrambling processing.

[0028] To achieve the above objectives, the communication system of the present invention includes a communication network composed of a switching node and two or more terminal nodes; wherein the switching node is used to complete information exchange between any two terminal nodes within the network, and the switching node includes:

[0029] The receiving module is used to receive source data packets from two terminal nodes;

[0030] The scrambling module is used to scramble the source data packets received from two terminal nodes.

[0031] The sending module is used to send the scrambled data packets back to the two terminal nodes respectively.

[0032] The terminal nodes include:

[0033] The sending module is used to send source data packets to the switching node so that they can be sent to another terminal node through the switching node;

[0034] The receiving module is used to receive the data packets after the switching node has scrambled the source data packets;

[0035] The descrambling module uses the source data packet to descramble the data packet after mutual scrambling; after descrambling, the source data packet sent by the other terminal node is obtained.

[0036] The present invention has the following advantages:

[0037] 1. The data packets forwarded by the switching nodes in this invention are scrambled data packets, not actual user data packets, and thus have a certain degree of confidentiality.

[0038] 2. In this invention, the switching node performs mutual scrambling and processing on the data packets of the two terminal nodes before forwarding them, which is equivalent to encrypting the data sent by the two terminal nodes in real time.

[0039] 3. Because the data packets sent by the terminal nodes change in real time, this encryption method is different from traditional key-based encryption methods. It is difficult to crack using statistical analysis and has high security.

[0040] 4. The scrambled data packets sent by the switching node to the terminal node in this invention contain data information sent by both terminal nodes. Therefore, each terminal node can use its pre-stored data packets sent by the node to descramble and process the received scrambled data packets to obtain the data packets sent by the other terminal node.

[0041] 5. In this invention, the switching node forwards the same data to two terminal nodes through the forward channel. If the two terminal nodes can receive data sent by one forward channel at the same time, then one forward channel can be used to forward data to the two terminal nodes, thereby effectively saving forward channel resources. Attached Figure Description

[0042] Figure 1 This is an architecture diagram of a terminal node, a switching node, and a communication system and method according to the present invention.

[0043] Figure 2 This is a schematic diagram illustrating the scrambling operation and processing of the exchange nodes in this invention.

[0044] Figure 3 This is a flowchart illustrating the data scrambling and transmission process of the exchange nodes in this invention.

[0045] Figure 4 This is a timing diagram for data packet transmission in the reverse and forward channels of this invention. Detailed Implementation

[0046] In the description of this invention, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0047] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0048] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0049] To improve the security of communication between two terminal nodes in a communication network and conserve channel resources, this invention provides a terminal node, a switching node, and a communication system and method. Specifically, at the switching node, the data sent by the two terminal nodes is cross-scrambled and processed to form cross-scrambled data, which is then sent back to the two terminal nodes. The cross-scrambled data contains the data information sent by the two terminal nodes. Each terminal node can use pre-stored data it sent to descramble the cross-scrambled data sent by the switching node to obtain the data sent by the other node. In this way, even if a third-party device intercepts the data sent by the switching node, it cannot descramble the data due to the lack of prior data, and therefore cannot obtain the actual data sent by the terminal node. Furthermore, the data forwarded by the switching node to the two terminal nodes in this invention is the same scrambled data. If the two terminal nodes can receive data on the same channel, a single forward channel can be used to send data to both terminal nodes, thereby saving channel resources.

[0050] A typical application scenario for this invention is a satellite communication network. In a satellite communication network, the switching node is the gateway station, the terminal node is the remote station, and the transmission line is the satellite channel. Communication between two remote stations is achieved through the gateway station's reception and forwarding. The satellite channel from the gateway station to the remote station is called the forward channel, and the satellite channel from the remote station to the gateway station is called the reverse channel. To reduce the cost of remote stations and support airborne, vehicle-mounted, or portable applications, gateway stations are typically equipped with large-aperture antennas to receive weaker signals, while remote stations have smaller antenna apertures and need to receive stronger signals. Therefore, the forward channel signal in a satellite communication network is at high risk of being eavesdropped or intercepted by third-party equipment. In traditional communication methods, the gateway station only forwards the data sent by the remote station without altering the data content itself; the data intercepted by third-party equipment from the forward channel is the actual data sent by the remote station. If the communication method of this invention is adopted, at the gateway station, the data sent by the two remote stations is scrambled and processed before being sent to the two remote stations. Therefore, even if a third-party device intercepts the data in the forward channel, it will only receive the scrambled data, not the actual data sent by the remote stations. Furthermore, in traditional communication methods, the data forwarded by the gateway station to the two remote stations is different, requiring two forward channels. In this invention, the data forwarded by the gateway station to the two remote stations is the same scrambled data. If the two remote stations are located within the same forward channel coverage area, only one forward channel needs to be used.

[0051] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0052] The implementation of this invention, including a terminal node, a switching node, and a communication system and method, comprises two phases: initialization and operation. The operation phase further includes five parallel processes: a terminal node data access process, a terminal node data transmission process, a switching node data reception process, a switching node data transmission process, and a terminal node data descrambling process. Each phase and process sequentially includes the following steps:

[0053] A. Initialization Phase: Initialize and set the system's operating status;

[0054] Step A1: According to business needs, set the length L and transmission time interval T of the data packets sent by terminal node 1 and terminal node 2 to the switching node.

[0055] B. System Operation Phase: Information exchange between two terminal nodes is achieved through the processing and forwarding of the exchange nodes.

[0056] B1: Terminal node data access process:

[0057] Step B1.1: Terminal node 1 receives the data sent by user 1, and according to the value of L in step A1, segments and packages the data sent by user 1, and stores it in the sending buffer A1 and descrambling buffer A2 of terminal node 1 in sequence; Terminal node 2 receives the data sent by user 2, and according to the value of L in step A1, segments and packages the data sent by user 2, and stores it in the sending buffer B1 and descrambling buffer B2 of terminal node 2 in sequence.

[0058] B2: Terminal node data transmission process:

[0059] In step B2.1, terminal node 1 extracts the data packet at the beginning of the transmission buffer A1 in step B1.1 in a first-in-first-out manner at time intervals of T in step A1, and sends it to the switching node through reverse channel 1; terminal node 2 extracts the data at the beginning of the transmission buffer B1 in step B1.1 in a first-in-first-out manner at time intervals of T in step A1, and sends it to the switching node through reverse channel 2.

[0060] B3: Data receiving process at the switching node:

[0061] Step B3.1: The switching node receives the data packets sent by terminal node 1 and stores them sequentially in local buffer C1, queuing them for scrambling; the switching node receives the data packets sent by terminal node 2 and stores them sequentially in local buffer C2, queuing them for scrambling.

[0062] B4: Data forwarding process of switching nodes:

[0063] Step B4.1: The switching node extracts the leading data packets of local buffers C1 and C2 from step B3.1 in a first-in-first-out manner, with time interval T in step A1 as the time interval. The two data packets are then cross-scrambled and processed to form a single cross-scrambled data packet. The cross-scrambled data packet is then sent to terminal node 1 through forward channel 1 and to terminal node 2 through forward channel 2.

[0064] B5: Terminal node data descrambling process:

[0065] Step B5.1: Terminal node 1 receives the scrambled data packets sent by the switching node in step B4.1, calls the data packets stored in the descrambling buffer A2 in step B1.1, descrambles and processes the scrambled data packets, and obtains the data sent by user 2 in step B1.1; Terminal node 2 receives the scrambled data packets sent by the switching node in step B4.1, calls the data packets stored in the descrambling buffer B2 in step B1.1, descrambles and processes the scrambled data packets, and obtains the data sent by user 1 in step B1.1.

[0066] In the above method, the size of the sending buffer A1 in step B1.1 meets the requirements for data transmission by terminal node 1 in step B2.1.

[0067] In the above method, the size of the sending buffer B1 in step B1.1 meets the requirements for data transmission by terminal node 2 in step B2.1.

[0068] In the above method, the size of buffer A2 in step B1.1 satisfies the requirement of terminal node 1 in step B5.1 to descramble and process the scrambled data packets sent by the switching node in step B4.1 and obtain the data sent by user 2 in step B1.1.

[0069] In the above method, the size of buffer B2 in step B1.1 meets the requirements of step B5.1 for terminal node 2 to descramble and process the scrambled data packet sent by the switching node in step B4.1 and obtain the data sent by user 1 in step B1.1.

[0070] In the above method, step B2.1, reverse channel 1, is the communication channel from terminal node 1 to the switching node.

[0071] In the above method, step B2.1, reverse channel 2, is the communication channel from terminal node 2 to the switching node.

[0072] In the above method, the transmission capacity of the reverse channel 1 in step B2.1 meets the transmission requirements of the data sent by user 1 to the switching node in step B1.1.

[0073] In the above method, the transmission capacity of the reverse channel 2 in step B2.1 meets the transmission requirements of the data sent by user 2 to the switching node in step B1.1.

[0074] In the above method, in step B2.1, terminal node 1 extracts the data packet at the beginning of the transmission buffer A1, sends it to the switching node through reverse channel 1, and then deletes the transmitted data packet; terminal node 2 extracts the data packet at the beginning of the transmission buffer B1, sends it to the switching node through reverse channel 2, and then deletes the transmitted data packet.

[0075] In the above method, the lengths of the local buffer C1 and local buffer C2 of the switching node in step B3.1 meet the requirements of step B4.1 after performing scrambling and processing on the two data packets, and then sending them to the two terminal nodes through the forward channel.

[0076] In the above method, after the switching node extracts the data packets at the very beginning of local buffer C1 and local buffer C2 in step B3.1, subsequent data packets are moved to the very beginning and wait for scrambling.

[0077] In the above method, step B4.1, the switching node performs scrambling and processing on the data packets sent by the two terminal nodes. This can be done using a simple XOR operation or other methods.

[0078] In the above method, after the switching node sends the scrambled data packets to terminal node 1 and terminal node 2 through the forward channel in step B4.1, it deletes the sent scrambled data packets.

[0079] In the above method, step B4.1, the transmission capacity of forward channel 1 meets the requirement of the switching node sending scrambled data packets to terminal node 1.

[0080] In the above method, step B4.1, the transmission capacity of the forward channel 2 meets the requirement of the switching node sending scrambled data packets to the terminal node 2.

[0081] In the above method, the scrambled data packets received by terminal node 1 and terminal node 2 in step B5.1 contain data information sent by the two terminal nodes. The terminal node can use the data packets it has already sent, stored in the descrambling buffer in step B1.1, to descramble and process the received scrambled data packets to obtain the data packets sent by the other terminal node.

[0082] In the above method, the switching node forwards the same data to two terminal nodes through the forward channel. If the two terminal nodes can receive data sent by one forward channel at the same time, then one forward channel can be used to forward data to the two terminal nodes, thereby effectively saving forward channel resources.

[0083] Example

[0084] The present invention discloses an architecture of a terminal node, a switching node, a communication system, and a method as follows: Figure 1 As shown. Figure 1 Terminal Node 1 and Terminal Node 2 communicate through the processing and forwarding of data by the switching node. Terminal Node 1 sends data to the switching node via reverse channel 1, and Terminal Node 2 sends data to the switching node via reverse channel 2. The switching node sends data to Terminal Node 1 via forward channel 1, and sends data to Terminal Node 2 via forward channel 2. The data packets sent by both Terminal Node 1 and Terminal Node 2 to the switching node are of length L, and the time interval is T.

[0085] Under the control of the packet transmission control module, terminal node 1 segments the data sent by user 1, packages it into data packets of length L, and then stores them sequentially in its transmission buffer module and descrambling buffer module in a first-in-first-out (FIFO) manner. Under the control of the packet transmission control module, the transmission module of terminal node 1 retrieves data packets from the transmission buffer module at time intervals of T and sends them to the switching node via reverse channel 1. Similarly, under the control of the packet transmission control module, terminal node 2 segments the data sent by user 2, packages it into data packets of length L, and then stores them sequentially in its transmission buffer module and descrambling buffer module in a first-in-first-out (FIFO) manner. Under the control of the packet transmission control module, the transmission module of terminal node 2 retrieves data packets from the transmission buffer module at time intervals of T and sends them to the switching node via reverse channel 2.

[0086] Figure 1 The switching node is equipped with two sets of receiving modules and two sets of scrambling buffer modules. Receiving module 1 receives data packets sent by terminal node 1 from reverse channel 1, and stores them sequentially in scrambling buffer module 1, queuing for use. Similarly, receiving module 2 receives data packets sent by terminal node 2 from reverse channel 2, and stores them sequentially in scrambling buffer module 2, queuing for use.

[0087] Figure 1 Under the control of the scrambling control module, the inter-scrambling module of the switching nodes extracts one data packet from each of the scrambling buffer module 1 and scrambling buffer module 2 in a first-in-first-out manner with a period of T. It then performs inter-scrambling operations and processing (such as XOR operation) on the two data packets to generate one inter-scrambling data packet. This inter-scrambling data packet is then sent to terminal node 1 through forward channel 1 and to terminal node 2 through forward channel 2. The inter-scrambling operation and processing of data at the switching nodes is as follows: Figure 2 As shown in the diagram. The flowchart for the data scrambling and transmission process between the switching nodes is as follows. Figure 3 As shown. Figure 3 The scrambling buffer C1 is located in Figure 1 The scrambling buffer module 1 stores the data packets sent by terminal node 1, and the scrambling buffer C2 is located in... Figure 1 The scrambling cache module 2 stores the data packets sent by terminal node 2.

[0088] Figure 1 The receiving module of terminal node 1 receives scrambled data packets sent by the switching node from forward channel 1, and descrambles and processes the scrambled data packets by calling the data packets stored in the descrambling buffer module to obtain the data sent by user 2. Similarly, the receiving module of terminal node 2 receives scrambled data packets sent by the switching node from forward channel 2, and descrambles and processes the scrambled data packets by calling the data packets stored in the descrambling buffer module to obtain the data sent by user 1.

[0089] The timing of data packet transmission via two backward channels and two forward channels in this invention is as follows: Figure 4 As shown. Figure 4 In this configuration, the data packets transmitted via forward channel 1 and forward channel 2 have the same content and timing. If two terminal nodes can simultaneously receive data sent via one forward channel, then one forward channel can be used to forward data to both terminal nodes, thus effectively saving forward channel resources.

[0090] In summary, to improve the security of communication between two terminal nodes in a communication network, this invention performs mutual scrambling operations and processes the data sent by the two terminal nodes at the switching node, forming scrambled data, which is then sent to the two terminal nodes. The scrambled data contains the data information sent by both terminal nodes. Each terminal node can use pre-stored data it sent to descramble the scrambled data sent by the switching node to obtain the data sent by the other node.

[0091] 6G (6th Generation Mobile Communication) is a fully connected network technology integrating terrestrial mobile communication and satellite communication technologies. It boasts ultra-high transmission rates, extremely low latency, and global coverage, making it a key technology for realizing the Internet of Things and driving the comprehensive development of a future intelligent society. 6G transmission lines integrate resources from terrestrial wireless networks and satellite networks. 6G switching nodes can be satellite communication gateway stations, terrestrial mobile communication base stations, or on-orbit satellites with on-board processing capabilities. 6G terminal nodes can be deployed on any smart device. This invention, based on a method to improve communication security through data scrambling at switching nodes, adds a scrambling mechanism to the switching nodes and a descrambling mechanism to the terminal nodes. This not only improves communication security but also saves bandwidth resources, making it highly suitable for widespread application in 6G networks.

[0092] The present invention has been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the embodiments described above. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention. Many other changes and modifications made without departing from the concept and scope of the present invention should be considered within the scope of protection of the present invention.

[0093] In the description of this specification, specific features, structures, materials, or characteristics may be combined in any suitable manner in one or more embodiments or examples.

[0094] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A communication method for switching nodes, wherein the switching node is used to complete information exchange between any two terminal nodes within a network, characterized in that, The method includes the following steps: Receive source data packets from two terminal nodes; The received source data packets from the two terminal nodes are scrambled together. The scrambled data packets are then sent back to the two terminal nodes respectively.

2. A terminal node communication method, wherein the terminal node is used to exchange information with any other terminal node in the network through a switching node, characterized in that, The method includes the following steps: Send the source data packet to the switching node so that it can be sent to another terminal node through the switching node; The receiving switching node performs scrambling on the source data packet; Use the source data packet to descramble the scrambled data packet; After descrambling, the source data packet sent by the other terminal node is obtained.

3. A switching node, wherein the switching node is used to complete information exchange between any two terminal nodes within a network, characterized in that, The aforementioned switching nodes include at least: The receiving module is used to receive source data packets from two terminal nodes; The scrambling module is used to scramble the source data packets received from two terminal nodes. The sending module is used to send the scrambled data packets back to the two terminal nodes respectively.

4. The switching node as described in claim 3, characterized in that, The switching node is a terrestrial mobile communication base station, a satellite communication gateway station, or an on-orbit satellite with on-board processing capabilities.

5. The switching node as described in claim 3, characterized in that, It also includes a scrambling buffer module, which is used to buffer the data packets received by the receiving module.

6. A terminal node, wherein the terminal node is used to exchange information with any other terminal node in the network through a switching node, characterized in that, The terminal nodes include: The sending module is used to send source data packets to the switching node so that they can be sent to another terminal node through the switching node; The receiving module is used to receive the data packets after the switching node has scrambled the source data packets; The descrambling module uses the source data packet to descramble the data packet after mutual scrambling; after descrambling, the source data packet sent by the other terminal node is obtained.

7. The terminal node as described in claim 6, characterized in that, Also includes: The data splitting and packaging module is used to split and package user data. The sending cache module is used to cache the segmented data packets; The descrambling and caching module is used to cache the sent data packets; After receiving the scrambling data packet, the descrambling module extracts the data packet sent from the descrambling cache module and performs descrambling processing.

8. A communication system comprising a communication network consisting of a switching node and two or more terminal nodes; wherein, The aforementioned switching node is used to complete information exchange between any two terminal nodes within the network, characterized in that the switching node comprises: The receiving module is used to receive source data packets from two terminal nodes; The scrambling module is used to scramble the source data packets received from two terminal nodes. The sending module is used to send the scrambled data packets back to the two terminal nodes respectively. The terminal nodes include: The sending module is used to send source data packets to the switching node so that they can be sent to another terminal node through the switching node; The receiving module is used to receive the data packets after the switching node has scrambled the source data packets; The descrambling module uses the source data packet to descramble the data packet after mutual scrambling; after descrambling, the source data packet sent by the other terminal node is obtained.

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