QoS policy synchronization method for cross-region remote communication

Abstract

The invention relates to the technical field of network communication, in particular to a QoS (Quality of Service) strategy synchronization method for cross-region remote communication, which is characterized in that a strategy synchronization system is arranged in a cross-region remote communication network; a network control layer system of each autonomous domain network system in the cross-region remote communication network is communicated with the strategy synchronization system by using a VPN virtual private line, so that each autonomous domain network system can acquire a QoS mapping list arranged in the strategy synchronization system in real time, and real-time synchronous control is carried out on QoS priorities of various service data at a user side; and the quality and the efficiency of cross-region remote communication are greatly improved.

Description

Technical Field

[0001] The present invention relates to the technical field of network communication, and in particular to a QoS policy synchronization method for cross-regional remote communication. Background Art

[0002] QoS (Quality of Service) is a traffic transmission mechanism on the Internet. This mechanism ensures that different types of network traffic receive corresponding service levels according to their needs, so as to ensure the real-time and stability of data transmission. The traffic transmission on the Internet is limited by bandwidth and device processing capabilities. Without the QoS mechanism, all devices will compete equally for limited bandwidth. During peak network traffic, devices may delay the processing of high-priority data packets (such as real-time video streams or voice data packets) due to processing too many low-priority data packets. For example, in a video conference, if the network delay is too high, it will cause the screen to freeze or the call quality to be poor, affecting the smoothness of communication. Therefore, a mechanism such as QoS is needed to prioritize these time-sensitive data packets to ensure that they can be transmitted in a timely and stable manner. Applications such as e-mail have relatively low requirements for delay and bandwidth. An e-mail can arrive at the recipient's mailbox after a few seconds or even minutes. Users generally do not notice obvious delays, so they generally do not need to be prioritized. It can be seen that the QoS mechanism allows network devices to prioritize high-priority data packets according to pre-set policies, thereby improving the device's service capabilities for key businesses. In particular, the bandwidth cost of wide area network (WAN) links is relatively high. When enterprises rent network links, they need to reasonably allocate bandwidth according to actual needs. The QoS mechanism can help enterprises allocate bandwidth according to the priority of business under limited bandwidth resources, ensuring that key businesses (such as the company's customer service hotline communications) can obtain sufficient bandwidth support.

[0003] In other words, QoS technology can run on a basic network platform with corresponding capabilities, and statically map different data flows and corresponding QoS levels according to current needs to achieve hierarchical communication quality assurance within a specific network. The current traditional QoS rule application methods include the following: 1. Application of port-based QoS rules Identify and classify network traffic based on specific port numbers assigned to different applications by network protocols. During network data transmission, network devices (such as routers or switches) check the port information of the data packet and divide the traffic of different ports into different priority queues.

[0004] However, with the development of network technology, many applications no longer use specific ports or use dynamic port allocation, and it is impossible to accurately identify application traffic through ports. For example, some P2P applications will randomly select ports for data transmission, and some applications will use port multiplexing technology, making it difficult to distinguish different applications and their traffic priorities based on ports alone.

[0005] Moreover, since the correspondence between ports and applications is fixed, when application requirements change or new applications emerge, port-based QoS rules cannot be adjusted in a timely and flexible manner. For example, if an enterprise introduces a new business system and uses non-standard ports, if the QoS rules are not adjusted in time, the business traffic may not be properly protected.

[0006] 2. Application of QoS rules based on protocols Traffic is classified according to different network protocols. For example, applications with high accuracy requirements (such as file transfer) use the TCP protocol, while applications with high real-time requirements (such as VoIP) use the UDP protocol. Network devices can allocate different resources and priorities according to protocol types.

[0007] However, dividing traffic based on protocol type alone cannot provide a more detailed distinction in service quality for applications or services of different importance under the same protocol. For example, online video and real-time surveillance video, both of which use the UDP protocol, may have different requirements for QoS indicators such as bandwidth and latency, but it is difficult to accurately distinguish and guarantee them based on protocol rules.

[0008] Moreover, the protocol itself is relatively fixed, while the business and requirements of the application layer are constantly changing. New applications or business models may innovate or expand on the basis of existing protocols, resulting in the inability to accurately adapt QoS rules based on traditional protocols. For example, although some emerging IoT applications use common network protocols, they have extremely high requirements for the real-time and reliability of data transmission. Traditional protocol-based QoS rules may not meet their special needs.

[0009] 3. QoS rule application based on IP address (source / destination) Network devices can apply QoS rules based on the source or destination IP address of a packet. By identifying IP addresses, network devices can distinguish traffic from different users, departments, or network areas. For example, in an enterprise network, you can set high priority for traffic from an IP address range of an important department (such as the finance department), or give priority to traffic from a specific server (such as a critical business server for the enterprise).

[0010] However, the same IP address may correspond to multiple different applications or business flows, and QoS rules based on IP addresses cannot provide differentiated service quality assurance for these different applications. For example, a server within an enterprise may provide Web services, file transfer services, and database services at the same time. Setting QoS rules based only on the server's IP address cannot meet the different needs of different services for network resources.

[0011] Moreover, when the network scale expands or the number of users increases, a large number of IP address-related rules need to be configured. The workload of managing and maintaining these rules is huge and prone to errors. For example, in a large enterprise network or a carrier network, there are tens of thousands of users and devices. It is almost unrealistic to set QoS rules for each IP address or address segment. Especially in a network environment where IP addresses are dynamically allocated, the IP address of the device may change frequently, causing the pre-set QoS rules based on fixed IP addresses to become invalid.

[0012] 4. Application-based QoS rule application By analyzing the characteristics of data packets, such as specific application signatures, the behavior of application layer protocols, etc., the application to which the traffic belongs is determined. Then QoS resources are allocated based on the importance of the application and the policies set by the user. For example, some advanced firewalls or smart routers can identify instant messaging applications such as WeChat and QQ, or video playback applications such as TikTok and iQiyi. Users can set the QoS level of each application according to their different needs for these applications, so that network devices can give priority to high-priority application data set by users.

[0013] However, as new applications continue to emerge, their characteristics and behaviors are constantly changing, making it increasingly difficult for network devices to accurately identify all applications. In particular, if QoS rules are not updated in a timely manner after the emergence of new applications, it will be impossible to effectively manage the quality of service for these new applications.

[0014] Moreover, the identification and classification of applications requires network devices to perform deep packet inspection and analysis, which consumes a lot of device resources, such as CPU, memory, etc., which may cause device performance degradation and affect the overall operation efficiency of the network. For example, when processing a large amount of concurrent traffic, network devices may be too busy identifying applications to forward packets in time, resulting in increased latency and increased packet loss.

[0015] In summary, the current traditional QoS rule application method is too inflexible. When applied in a highly complex network environment, it is impossible to strike a balance between data transmission quality and data transmission efficiency. In particular, data transmission in cross-regional remote communications must cross multiple autonomous domain network systems to transmit data from the source to the destination. This process requires the numerous autonomous domain network systems between the source and the destination to synchronously update the QoS policy. However, the QoS technology currently used in cross-regional remote communications is affected by various complex factors, resulting in extremely low efficiency in synchronously updating the QoS policy, which is unable to adapt to the changing speed of the user's demand for QoS policy, making the network data transmission quality of cross-regional remote communications unable to meet the user's requirements.

[0016] How to enable each autonomous domain network system to update and synchronize QoS strategies in a wide area network link with limited bandwidth in a timely manner and improve the quality of cross-regional remote communications has always been a problem that needs to be solved urgently by technical personnel in this field. Summary of the invention

[0017] The purpose of the present invention is to address the corresponding deficiencies of the prior art and provide a QoS policy synchronization method for cross-regional remote communication. A policy synchronization system is set up in the cross-regional remote communication network, and a VPN virtual dedicated line is used to connect the network control layer system of each autonomous domain network system in the cross-regional remote communication network with the policy synchronization system, so that each autonomous domain network system can obtain the QoS mapping list set in the policy synchronization system in real time, and perform real-time synchronization control on the QoS priority of various types of business data on the user side, thereby greatly improving the quality and efficiency of cross-regional remote communication.

[0018] The objective of the present invention is achieved by adopting the following scheme: A QoS policy synchronization method for cross-regional remote communication includes the following steps: 1) deploying a policy synchronization system in a cross-regional remote communication network, wherein the policy synchronization system is provided with a QoS mapping list for cross-regional remote communication, which is used to store a relationship correspondence table of QoS priorities of various types of service data on the user side; 2) Use VPN virtual dedicated lines to connect the network control layer system of each autonomous domain network system in the cross-regional remote communication network with the policy synchronization system, so that each autonomous domain network system can obtain the QoS mapping list set in the policy synchronization system in real time; 3) Use the policy synchronization system to synchronize the QoS policies of each autonomous domain network system in real time during cross-regional remote communications.

[0019] Preferably, the relationship correspondence table includes a five-tuple, a service protocol, a priority, and a QoS policy upload time.

[0020] Preferably, the policy synchronization system includes a time synchronization unit for synchronizing the time of each autonomous domain network system in the cross-regional telecommunication network.

[0021] Preferably, the policy synchronization system includes a synchronization refresh unit, which is provided with a synchronization time threshold for controlling the update time interval of the QoS mapping list during cross-regional remote communication.

[0022] Preferably, the policy synchronization system is any autonomous domain network system in a cross-regional remote communication network.

[0023] Preferably, the policy synchronization system is a network system independent of each autonomous domain network system in the cross-regional remote communication network.

[0024] Preferably, in step 3), the QoS policies of each autonomous domain network system are synchronized in real time in cross-regional remote communication using a policy synchronization system, specifically including: 3-1) The user side of the service traffic initiator generates a local traffic protection priority list based on the current service priority requirements, transmits it to the policy synchronization system through the VPN virtual dedicated line, and stores it in the QoS mapping list as the priority policy correspondence table of the entire cross-regional remote communication network; 3-2) Each autonomous domain network system in the cross-regional telecommunication network downloads the QoS mapping list from the policy synchronization system, and updates the traffic guarantee priority in the local traffic guarantee priority list according to the content of the QoS mapping list; 3-3) Each autonomous domain network system in the cross-regional telecommunication network forwards the service flow message according to the traffic guarantee priority in the local traffic guarantee priority list until the service priority requirement on the user side of the service flow initiator changes, and repeats steps 3-1) to 3-3).

[0025] Preferably, in step 3), before using the policy synchronization system to synchronize the QoS policies of each autonomous domain network system in real time in the cross-regional remote communication, the process further includes synchronizing the clocks of each autonomous domain network system in the cross-regional remote communication network.

[0026] Preferably, in step 3-2), before each autonomous domain network system in the cross-regional telecommunication network downloads the QoS mapping list from the policy synchronization system, it also includes determining whether to update the traffic guarantee priority in the local traffic guarantee priority list.

[0027] Preferably, determining whether to update the traffic guarantee priority in the local traffic guarantee priority list comprises the following steps: ① The policy synchronization system records the system time when the user side of the service traffic initiator uploads the local traffic protection priority list to the QoS mapping list as the QoS policy upload time of the priority policy mapping table; ② In cross-regional remote communications, each autonomous domain network system compares the QoS policy upload time and the update time of the local traffic guarantee priority list: If the QoS policy upload time is later than the update time of the local traffic protection priority list of the autonomous domain network system, the autonomous domain network system re-downloads the QoS mapping list from the policy synchronization system and updates the traffic protection priority in the local traffic protection priority list according to the content of the QoS mapping list; If the QoS policy upload time is no later than the update time of the local traffic protection priority list of the autonomous domain network system, the autonomous domain network system does not need to update the traffic protection priority in the local traffic protection priority list.

[0028] The beneficial effect of the present invention is that a policy synchronization system is deployed in a cross-regional remote communication network, and the policy synchronization system is provided with a QoS mapping list for cross-regional remote communication, which is used to save the relationship correspondence table of QoS priorities of various types of business data on the user side, and utilizes a VPN virtual dedicated line to connect the network control layer system of each autonomous domain network system in the cross-regional remote communication network with the policy synchronization system, so that each autonomous domain network system can obtain the QoS mapping list set in the policy synchronization system in real time.

[0029] In this way, each autonomous domain network system of the entire cross-regional remote communication network can utilize the policy synchronization system to timely synchronize the same QoS policy in cross-regional remote communication.

[0030] Preferably, the policy synchronization system includes a time synchronization unit for time synchronization of each autonomous domain network system in the cross-regional remote communication network. Before using the policy synchronization system to synchronize the QoS policies of each autonomous domain network system in real time in the cross-regional remote communication, it also includes synchronizing the clocks of each autonomous domain network system in the cross-regional remote communication network, so as to maximize the consistency of data transmission and the timeliness and accuracy of real-time synchronization of QoS policies.

[0031] Preferably, the policy synchronization system includes a synchronization refresh unit, which is provided with a synchronization time threshold for controlling the update time interval of the QoS mapping list during the cross-regional remote communication process. In this way, each autonomous domain network system in the cross-regional remote communication network can read the information of the QoS mapping list according to the time interval set by the synchronization time threshold. The setting of the synchronization time threshold can be determined based on the bearing capacity and work efficiency of each autonomous domain network system, preferably taking into account the balance between speed and quality.

[0032] Preferably, the policy synchronization system is any autonomous domain network system in the cross-regional remote communication network, which saves costs without destroying the original cross-regional remote communication network architecture. Of course, the policy synchronization system can also be a network system independent of each autonomous domain network system in the cross-regional remote communication network, avoiding adding burden to each autonomous domain network system and further improving update efficiency.

[0033] Preferably, before each autonomous domain network system in the cross-regional remote communication network downloads the QoS mapping list from the policy synchronization system, it also includes determining whether to update the traffic guarantee priority in the local traffic guarantee priority list. If the traffic guarantee priority in the local traffic guarantee priority list does not need to be updated, the autonomous domain network system does not need to download the QoS mapping list from the policy synchronization system, thereby further reducing the burden on the autonomous domain network system.

[0034] The advantages of the present invention are as follows: (1) The present invention can customize the QoS mapping relationship by establishing a user-side policy synchronization system, and automatically synchronize it to the entire cross-regional remote communication network, effectively improving the efficiency of changing the communication quality assurance of the current key business data flow in cross-regional remote communication, thereby meeting the communication quality assurance needs of the user end that change at any time; (2) The present invention can synchronize the data forwarding priority of the long-distance communication path link and maintain the consistency of the forwarding strategy, so that the same business data can obtain the same forwarding guarantee service when passing through different communication lines, thereby ensuring the smooth interaction of key business data. Glossary

[0035] Cross-regional remote communication: Cross-regional remote communication refers to a communication method for transmitting information between different geographical locations. Cross-regional remote communication is crucial for multinational companies and cross-regional enterprises. It is used in daily business communication, project collaboration, customer service and many other aspects. For example, a product development team, whose members are distributed in different cities, can jointly complete product design, testing and other work processes through remote communication tools, improve work efficiency and reduce communication costs. For another example, through online course platforms, video conferencing software, etc., teachers can teach in one place, while students can access the Internet to attend classes in different cities and countries. For example, online courses of some well-known universities have attracted students from all over the world to participate in learning, promoting the dissemination and sharing of knowledge. Therefore, cross-regional remote communication generally refers to long-distance data transmission above the provincial level.

[0036] Autonomous network system: An autonomous network system is a network area consisting of a group of network devices (mainly routers) that are managed in a unified manner. These devices run the same routing protocol and have autonomy in network management strategies, and can independently decide how to forward data packets within them. For example, the network of a large Internet service provider (ISP) or the internal network of a large enterprise in a certain area can be regarded as an autonomous network system. The internal networks of the large enterprise in different regions are different autonomous network systems, and they need to communicate remotely across regions to transmit network traffic data.

[0037] Source: In the process of network data transmission, the source is the starting point of data transmission. It is like the sender of a letter, where data is generated and begins to be transmitted, also known as the business traffic initiator. Usually, the autonomous domain network system where the data is initially generated can be regarded as the starting point of data transmission, and the various network devices in this autonomous domain network system can also be regarded as the starting point of data transmission, such as personal computers, servers, smart phones, etc. For example, when a user uses a computer to send an email through the network, the user's computer is the source of data transmission.

[0038] Destination: The destination is the final receiving point of network data transmission, similar to the recipient of a letter. It is the device or network where the data will eventually reach after being transmitted through the network. Usually, the autonomous domain network system where the data will eventually reach can be regarded as the final data receiving point, and the various network devices in this autonomous domain network system can also be regarded as the final data receiving point, including the server used to store data in this autonomous domain network system, the personal computer used by users to view information, and the printer used to print documents. For example, when a user downloads a file from the Internet to his own computer, the user's computer is the destination of the data transmission.

[0039] User side: In the context of QoS (quality of service), the user side mainly refers to the end user of network services. It includes terminal devices used by individual users (such as personal computers, smart phones, tablets, etc.), as well as terminal devices and network access points within enterprise users. From the perspective of physical connection, it can also be regarded as the network environment from the user device to the network access device (such as home routers, enterprise access layer switches, etc.).

[0040] QoS Mapping List: QoS mapping list is a tool for associating and matching different types of network traffic with their corresponding quality of service requirements (such as priority). It is like a translation manual that translates various complex network traffic (such as voice calls, video streaming, file downloads, etc.) into quality of service parameters that network devices can understand. Through the QoS mapping list set by the present invention, network administrators can effectively allocate and manage network resources, ensure that important and delay-sensitive traffic (such as real-time video conferencing) can be given priority, and reasonably arrange the transmission of other non-critical traffic (such as software update downloads) to improve the overall network service quality.

[0041] Quintuple: Quintuple is a combination used to identify a network connection or network flow. It consists of five elements: source IP address, source port, destination IP address, destination port, and protocol. These five elements can uniquely determine the communication connection between two endpoints in the network, just like an "identity card" for network communication.

[0042] Network control layer system: The network control layer system is in a key position in the network architecture. It is responsible for the interconnection of various heterogeneous networks, enabling networks of different types and architectures to communicate with each other, and managing and coordinating functions such as resource allocation, traffic scheduling, and connection control in the network. Its purpose is to ensure that the entire network can operate efficiently and stably to meet the network quality of service (QoS) requirements of different users and applications. Specifically, it is like a traffic command center. According to the real-time status of the network and preset rules, it directs the transmission path of data packets in the network, reasonably allocates resources such as bandwidth, avoids traffic congestion (network congestion), and ensures the priority passage of important data (high-priority traffic processing).

[0043] VPN virtual dedicated line: VPN (Virtual Private Network) virtual dedicated line is a technology that establishes a dedicated network connection on a public network (such as the Internet). In the present invention, the low-cost VPN virtual dedicated line can reduce the cost investment of enterprises or network operators while ensuring a certain degree of security and exclusivity. It uses encryption and tunneling technology to make data seem to be transmitted on an independent dedicated line, avoiding interference from the public network.

[0044] Synchronous clock: refers to a mechanism that keeps the clocks of various devices or systems consistent or synchronized according to certain rules in a network system or multiple related systems. It is like making a group of people act according to the same rhythm and time standard. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Figure 1 is a flow chart of the present invention; Figure 2 Schematic diagram of an embodiment of the present invention. DETAILED DESCRIPTION

[0046] like Figure 1 As shown, a QoS policy synchronization method for cross-regional remote communication includes the following steps: 1) Deploy a policy synchronization system in a cross-regional remote communication network. The policy synchronization system is provided with a QoS mapping list for cross-regional remote communication, which is used to store a relationship correspondence table of QoS priorities of various types of business data on the user side; the relationship correspondence table includes a five-tuple, service protocol, priority, and QoS policy upload time.

[0047] It is worth noting that the policy synchronization system can be any autonomous domain network system in the cross-regional remote communication network, saving costs without destroying the original cross-regional remote communication network architecture. Of course, the policy synchronization system can also be a network system independent of each autonomous domain network system in the cross-regional remote communication network, avoiding increasing the burden on each autonomous domain network system and further improving the update efficiency.

[0048] Furthermore, the policy synchronization system includes a time synchronization unit for synchronizing the time of each autonomous domain network system in the cross-regional telecommunication network.

[0049] The policy synchronization system includes a synchronization refresh unit, which is provided with a synchronization time threshold (usually 1 second) for controlling the update time interval of the QoS mapping list during cross-regional remote communication.

[0050] 2) Use VPN virtual dedicated lines to connect the network control layer system of each autonomous domain network system in the cross-regional remote communication network with the policy synchronization system, so that each autonomous domain network system can obtain the QoS mapping list set in the policy synchronization system in real time; 3) Use the policy synchronization system to synchronize the QoS policies of each autonomous domain network system in real time during cross-regional remote communications, including: 3-1) The user side of the service traffic initiator generates a local traffic protection priority list based on the current service priority requirements, transmits it to the policy synchronization system through the VPN virtual dedicated line, and stores it in the QoS mapping list as the priority policy correspondence table of the entire cross-regional remote communication network; 3-2) Each autonomous domain network system in the cross-regional telecommunication network downloads the QoS mapping list from the policy synchronization system, and updates the traffic guarantee priority in the local traffic guarantee priority list according to the content of the QoS mapping list; It is worth noting that in step 3-2), before each autonomous domain network system in the cross-regional remote communication network downloads the QoS mapping list from the policy synchronization system, it also includes determining whether to update the traffic guarantee priority in the local traffic guarantee priority list, including the following steps: ① The policy synchronization system records the system time when the user side of the service traffic initiator uploads the local traffic protection priority list to the QoS mapping list as the QoS policy upload time of the priority policy mapping table; ② In cross-regional remote communications, each autonomous domain network system compares the QoS policy upload time and the update time of the local traffic guarantee priority list: If the QoS policy upload time is later than the update time of the local traffic protection priority list of the autonomous domain network system, the autonomous domain network system re-downloads the QoS mapping list from the policy synchronization system and updates the traffic protection priority in the local traffic protection priority list according to the content of the QoS mapping list; If the QoS policy upload time is no later than the update time of the local traffic protection priority list of the autonomous domain network system, the autonomous domain network system does not need to update the traffic protection priority in the local traffic protection priority list. In other words, the autonomous domain network system does not need to re-download the QoS mapping list from the policy synchronization system, and still forwards service flow messages according to the original traffic protection priority in the local traffic protection priority list.

[0051] 3-3) Each autonomous domain network system in the cross-regional telecommunication network forwards the service flow message according to the traffic guarantee priority in the local traffic guarantee priority list until the service priority requirement on the user side of the service flow initiator changes, and repeats steps 3-1) to 3-3).

[0052] It is worth noting that in step 3), before using the policy synchronization system to synchronize the QoS policies of each autonomous domain network system in real time in the cross-regional remote communication, it also includes synchronizing the clocks of each autonomous domain network system in the cross-regional remote communication network.

[0053] According to the above method, an embodiment is made. In this embodiment, according to the change of the QoS policy demand of the user side, the QoS policy of the entire cross-regional remote communication network is updated in real time and synchronously, such as Figure 2 As shown: ⑴ Synchronize the clocks of each autonomous domain network system in the cross-regional remote communication network; (2) The user side of the service traffic initiator A1 generates a local traffic guarantee priority list P1 according to the current service priority requirements; (3) The user side of the service traffic initiator A1 transmits the local traffic protection priority list P1 to the policy synchronization system through the VPN virtual dedicated line, stores it in the QoS mapping list as the priority policy correspondence table of the entire cross-regional remote communication network, and updates the QoS policy upload time T1 of the priority policy correspondence table (that is, the time when the local traffic protection priority list of the service traffic initiator is uploaded to the policy synchronization system); (4) The autonomous domain network systems N1, N2, N3, and A2 (destination end) in the cross-regional remote communication network read the information of the QoS mapping list once per second (or directly read the information of the QoS mapping list according to the time interval set by the synchronization time threshold), and compare the QoS policy upload time with the update time of the local traffic guarantee priority list: If the QoS policy upload time is later than the update time of the local traffic protection priority list, the autonomous domain network system re-downloads the QoS mapping list from the policy synchronization system and updates the traffic protection priority in the local traffic protection priority list according to the content of the QoS mapping list; If the QoS policy upload time is no later than the update time of the local traffic protection priority list of the autonomous domain network system (for example, the QoS policy upload time is the same as the update time of the local traffic protection priority list), then the autonomous domain network system does not need to update the traffic protection priority in the local traffic protection priority list.

[0054] ⑸ Each autonomous domain network system in the cross-regional remote communication network forwards the service flow message according to the traffic guarantee priority in the local traffic guarantee priority list until the service priority requirement on the user side of the service traffic initiator changes, and repeats steps ⑵ to ⑸.

[0055] It has been proved through experiments that each autonomous domain network system in the cross-regional remote communication network of this embodiment can automatically synchronize the new QOS mapping relationship to other autonomous domain network systems according to the changes in the QoS priority policy on the user side of the service traffic initiator. Especially in the process of long-distance communication across provinces and cities, even if passing through multiple heterogeneous networks, it is still possible to specify the forwarding level of different service data (for example, temporarily adjust lower priority service data to higher priority service data), and automatically synchronize the QoS policy through cross-regional communication equipment, so that the forwarding priority level of each intermediate link is consistent.

[0056] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modification made to the present invention by those skilled in the art without departing from the spirit of the present invention shall fall within the protection scope of the present invention.

Claims

1. A QoS policy synchronization method for cross-regional remote communication, characterized in that: The following steps are involved: 1) deploying a policy synchronization system in a cross-regional remote communication network, wherein the policy synchronization system is provided with a QoS mapping list for cross-regional remote communication, which is used to store a relationship correspondence table of QoS priorities of various types of service data on the user side; 2) Use VPN virtual dedicated lines to connect the network control layer system of each autonomous domain network system in the cross-regional remote communication network with the policy synchronization system, so that each autonomous domain network system can obtain the QoS mapping list set in the policy synchronization system in real time; 3) Use the policy synchronization system to synchronize the QoS policies of each autonomous domain network system in real time during cross-regional remote communications.

2. The QoS policy synchronization method according to claim 1, characterized in that: The relationship correspondence table includes a five-tuple, a service protocol, a priority, and a QoS policy upload time.

3. The QoS policy synchronization method according to claim 1, characterized in that: The policy synchronization system includes a time synchronization unit, which is used for time synchronization of each autonomous domain network system in the cross-regional remote communication network.

4. The QoS policy synchronization method according to claim 1, characterized in that: The policy synchronization system includes a synchronization refresh unit, which is provided with a synchronization time threshold for controlling the update time interval of the QoS mapping list during cross-regional remote communication.

5. The QoS policy synchronization method according to claim 1, characterized in that: The policy synchronization system is any autonomous domain network system in a cross-regional remote communication network.

6. The QoS policy synchronization method according to claim 1, characterized in that: The policy synchronization system is a network system independent of each autonomous domain network system in the cross-regional remote communication network.

7. The QoS policy synchronization method according to claim 1, characterized in that: In step 3), the QoS policies of each autonomous domain network system are synchronized in real time in cross-regional remote communication using the policy synchronization system, including: 3-1) The user side of the service traffic initiator generates a local traffic protection priority list based on the current service priority requirements, transmits it to the policy synchronization system through the VPN virtual dedicated line, and stores it in the QoS mapping list as the priority policy correspondence table of the entire cross-regional remote communication network; 3-2) Each autonomous domain network system in the cross-regional telecommunication network downloads the QoS mapping list from the policy synchronization system, and updates the traffic guarantee priority in the local traffic guarantee priority list according to the content of the QoS mapping list; 3-3) Each autonomous domain network system in the cross-regional telecommunication network forwards the service flow message according to the traffic guarantee priority in the local traffic guarantee priority list until the service priority requirement on the user side of the service flow initiator changes, and repeats steps 3-1) to 3-3).

8. The QoS policy synchronization method according to claim 1 or 7, characterized in that: In step 3), before using the policy synchronization system to synchronize the QoS policies of each autonomous domain network system in real time in the cross-regional remote communication, it also includes synchronizing the clocks of each autonomous domain network system in the cross-regional remote communication network.

9. The QoS policy synchronization method according to claim 7, characterized in that: In step 3-2), before each autonomous domain network system in the cross-regional telecommunication network downloads the QoS mapping list from the policy synchronization system, it also includes determining whether to update the traffic guarantee priority in the local traffic guarantee priority list.

10. The QoS policy synchronization method according to claim 9, characterized in that: Determining whether to update the traffic guarantee priority in the local traffic guarantee priority list includes the following steps: ① The policy synchronization system records the system time when the user side of the service traffic initiator uploads the local traffic protection priority list to the QoS mapping list as the QoS policy upload time of the priority policy mapping table; ② In cross-regional remote communications, each autonomous domain network system compares the QoS policy upload time and the update time of the local traffic guarantee priority list: If the QoS policy upload time is later than the update time of the local traffic protection priority list of the autonomous domain network system, the autonomous domain network system re-downloads the QoS mapping list from the policy synchronization system and updates the traffic protection priority in the local traffic protection priority list according to the content of the QoS mapping list; If the QoS policy upload time is no later than the update time of the local traffic protection priority list of the autonomous domain network system, the autonomous domain network system does not need to update the traffic protection priority in the local traffic protection priority list.

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