CN100466859C - Service QoS guarantee method and device for wireless mesh network - Google Patents

Abstract

The present invention provides a QoS guarantee method and device, which are used to provide QoS guarantee for the service flow transmission of the mesh network. The method includes the following steps: step a, the source node sends a service request to the destination node, Transmit service flows on the route of the node, wherein, the source node and the destination node are respectively in the mesh network or the backbone network, and the service request includes the first QoS parameter; Step b, when the source node and the destination node are in the same mesh network , provide QoS guarantee according to the first QoS parameter for the transmission of the service flow from the source node to the destination node; and step c, when the source node and the destination node belong to the mesh network and the backbone network respectively, convert the first QoS parameter The second QoS parameter whose format corresponds to the QoS parameter format of the network where the destination node is located provides QoS guarantee for the transmission of the service flow from the source node to the fixed node according to the first QoS parameter and the second QoS parameter.

Description

Service QoS guarantee method and device for wireless mesh network

technical field

The invention relates to the communication field, in particular to a method and a device for service QoS guarantee in a wireless Mesh network and between it and a backbone network.

Background technique

As a new technology, wireless mesh (Mesh) network provides broadband wireless access to the Internet (Internet, the backbone network), or is used to establish self-organizing networks where some wired facilities are unavailable or not suitable for establishment. The emergence of Mesh networks provides the possibility for wireless terminals to access the Internet anytime and anywhere with broadband, and has broad application scenarios.

Figure 1 shows the interconnection architecture of wireless MESH network and IP backbone network.

As shown in Figure 1, a complete Mesh network consists of three types of nodes: wireless routers, gateway nodes and end users. Gateway nodes are used to connect Mesh networks with other types of networks, such as the Internet. Mesh wireless routers are connected to each other through wireless links to form the skeleton network of the Mesh network, which is called the transmission plane. The transmission plane provides wireless communication for services between nodes in the network or between users and the Internet through multi-hop forwarding. The terminal user and the wireless router constitute the access plane through wireless connection.

With the continuous expansion of the application field of network technology, the service bearer network needs to provide QoS (Quality of Service) support, which not only requires the core network to provide QoS support, but also requires the access network to provide QoS support. When mobile users use the Mesh network shown in Figure 1 to access the Internet, the wireless Mesh network mainly provides users with access capabilities. QoS support needs to be implemented from the wireless Mesh network to the Internet backbone network and from the Internet backbone network to the wireless Mesh network.

The standardized Internet QoS scheme mainly includes integrated service (InterServ: Integrated Service) and differentiated service (DiffServ: Differentiated Service), which can be used in Internet. In the specification document ITU-T Y.1291 recommendation of ITU, a QoS architecture of IP telecommunication network (IPTN) is proposed. The QoS architecture belongs to one of integrated service technologies, and the QoS architecture will be described in detail below with reference to FIG. 2 .

FIG. 2 shows a QoS architecture diagram in IPTN in the ITU-T Y.1291 recommendation of the related art.

In the ITU-T Y.1291 recommendation, an IPTN QoS architecture is proposed, and the basic structure is shown in Figure 2.

As shown in Figure 2, for the convenience of network management and network stability, the network is divided into various network areas. For each network area, there is a delivery resource control entity. Each bearer resource management entity (BRM: Bearer Resource Manager) is an entity that can independently complete resource control functions. The resources it controls are the resources in each area. resource. The network topology and resources in the area are recorded in the BRM, and based on these BRMs, the path selection and resource allocation for internal communication in the area are realized. BRMs in different regions exchange information to provide resources for cross-regional service flows.

After the BRM receives the resource request from the service controller (SCS: Service Control Server) or other BRMs, it processes the request and gives a confirmed response to the SCS. At the same time, if the service request is confirmed, the BRM will notify the edge router of the confirmation information, path and QoS parameters of the service. The edge router completes operations such as identification, classification, and marking, and encapsulates the service into a package in the form specified by the BRM.

The functions of an SCS include controlling different service requests, identifying the source and destination of each service request, translating it into an IP address, and sending a resource request to the BRM of the area network where the source point is located to request resources to ensure the QoS of the service.

Similarly, the integrated service technology and differentiated service technology in the standardized Internet QoS solution can only provide QoS support for services on the Internet.

In addition, in related technologies, a method for supporting QoS in the data link layer of the mesh network is proposed, which is a QoS guarantee mechanism starting from the MAC mechanism in the wireless mesh network. In this set of mechanisms, aiming at the fact that the traditional IEEE 802.11s mechanism cannot support multiple services, especially the symmetric services such as voice and cannot guarantee the service quality of services, a multi-service support method suitable for mesh networks is given. A channel allocation method that can guarantee business service quality.

In this method, services are divided into symmetrical services and asymmetrical services, and different operations are performed according to different service types and different service quality requirements, mainly bandwidth requirements. The technical solution also allows high-priority services to preempt channels used by low-priority services, and can well guarantee the service quality of services, especially high-priority services.

In addition, in related technologies, a routing method for supporting QoS at the network layer of the MESH network is proposed, which is a routing method for providing QoS guarantee in the network starting from the network layer in the wireless mesh network.

In this technical solution, the cluster head selects an intra-cluster path that meets the bandwidth requirement according to the cluster topology information. The gateway node ensures that the inter-cluster link meets the bandwidth requirement, and monitors the long-term available bandwidth of the inter-cluster link, and records the inter-cluster link bottleneck value in the routing request packet. The destination node selects the optimal route according to the bottleneck value of the inter-cluster link bandwidth and the number of route hops. The route found can guarantee the bandwidth required by the service flow, and has good delay characteristics. It can provide quality of service guarantee for real-time business flow.

It can be seen that the technical solution in the above-mentioned ITU-T Y.1291 proposal can only provide QoS support for services on the Internet, and the above-mentioned Mesh network data link layer solution and network layer solution can only provide QoS support for services on the Mesh network. QoS support. However, when the Mesh network is interconnected with the Internet, the existing QoS policies in the Mesh network are incompatible with the IPTN architecture. It provides guarantee for the service QoS between the wireless Mesh network and the backbone network, so it cannot provide end-to-end QoS guarantee for the service.

Therefore, people need a solution that can guarantee QoS in the wireless Mesh network and the interconnection between the wireless Mesh network and the IP backbone network, so that for services from the IP backbone network to the The business of backbone network can realize QoS guarantee.

Contents of the invention

The object of the present invention is to provide a quality of service guarantee method and device for providing quality of service guarantee for services in the wireless Mesh network and between it and the backbone network, so as to solve the problems in the wireless Mesh network and the IP backbone network in the related art. Interconnect QoS issues.

According to one aspect of the present invention, a quality of service guarantee method is provided, which is used to provide quality of service guarantee for the service flow transmission of the wireless mesh network, including the following steps: step a, the source node sends a service request to the destination node, and the request is sent in The service flow is transmitted on the route from the source node to the destination node, wherein the source node and the destination node are respectively in the mesh network and the backbone network or the source node and the destination node are in the same mesh network, and the service request includes the first quality of service parameter ; After the gateway node receives the service request sent by the source node, it judges whether the source node and the destination node are in the same mesh network or belong to the mesh network and the backbone network through the relevant information of the source node and the destination node ; Step b, when the source node and the destination node are in the same mesh network, the transmission of the service flow from the source node to the destination node provides quality of service guarantee according to the first service quality parameter; and step c, when the source node and the destination node When the destination node belongs to the mesh network and the backbone network respectively, the first quality of service parameter is converted into the second quality of service parameter whose format corresponds to the quality of service parameter format of the network where the destination node is located, and the traffic flow from the source node The transmission to the destination node provides a quality of service guarantee in accordance with the first quality of service parameter and the second quality of service parameter.

In the above-mentioned quality of service guarantee method, step b includes the following steps: step b1, the gateway node in the mesh network analyzes the service quality required by the first quality of service parameter; and step b2, analyzes the location where the source node and the destination node are located Whether the mesh network can provide bandwidth resources that meet the quality of service and provide corresponding services.

In the above-mentioned quality of service guarantee method, step b2 includes the following steps: judging whether the source node and the destination node are on the access plane where the gateway node is located, and if so, the gateway node judges whether the access plane can provide a service that satisfies the quality of service If not, directly reject the service request; otherwise, reserve bandwidth resources on the access plane and notify the source node to send the service flow; otherwise, determine whether the gateway node is connected to the source node but not adjacent to the destination node, If so, first judge whether the gateway node can allocate bandwidth resources that meet the service quality requirements of the service flow for the source node on the access plane, if not, reject the service request; if yes, further judge according to the path of the service flow Whether the bandwidth resources between the gateway node and the next-hop gateway node can meet the service quality requirements of the business, if not, reject the service request, if yes, accept the service request, reserve bandwidth resources for it, and send The next hop forwards the request; otherwise, judge whether the gateway node is adjacent to the destination node but not adjacent to the source node, and if so, judge whether the gateway node can assign the destination node on the access plane to meet the quality of service requirements of the traffic flow If not, then reject the service request; if yes, accept the service request and reserve bandwidth resources for it; and otherwise, determine whether the gateway node can neither communicate directly with the source node nor with the destination node, if yes, Then judge according to the path of the business flow whether the bandwidth resources between the gateway node and the next-hop gateway node can meet the service quality requirements of the business, if not, reject the business request, if yes, accept the business request and reserve bandwidth for it resource, and forward the service request to the next-hop gateway node.

In the above-mentioned quality of service guarantee method, the service is a downlink service, and step c includes: step c1, the gateway node performs parameter mapping from the backbone network to the mesh network, and converts the first quality of service parameter into the quality of service parameter format of the mesh network The second quality of service parameter, forward the service request containing the second quality of service parameter to the mesh network, wait for the response from the mesh network, and if it receives a positive confirmation from the mesh network within the specified time, send it to the backbone network The confirmation information of the allowed service, otherwise, the service request from the backbone network is rejected.

In the above-mentioned service quality guarantee method, the service is an uplink service, and step c includes: step c2, the gateway node judges whether the available bandwidth resources of the link connecting the gateway node and the backbone network meet the bandwidth requirements of the service, and if the resources are insufficient, then refuse Service request, otherwise reserve resources and perform parameter mapping from the mesh network to the backbone network, convert the first quality of service parameter into the second quality of service parameter in the format of the mesh network quality of service parameter, and forward the parameter containing the second service to the backbone network The service request of quality parameters waits for the response from the backbone network. If a positive confirmation is received from the backbone network within the specified time, it will send a confirmation message to the mesh network to allow data transmission, otherwise, the service request will be rejected.

In the above quality of service guarantee method, the format of the first quality of service parameter includes at least one of the following information: bandwidth information of the mesh network; priority information of the source node; type of service to be transmitted; delay requirement of the service to be transmitted; The delay jitter requirement of the service to be transmitted; the speed requirement of the service to be transmitted; and the priority of the service to be transmitted; the format of the second quality of service parameter includes at least one of the following information: bandwidth information of the backbone network; priority information of the destination node; The type of service to be transmitted; the delay requirement of the service to be transmitted; the delay jitter requirement of the service to be transmitted; the speed requirement of the service to be transmitted; and the priority of the service to be transmitted.

In the above quality of service guarantee method, the method for converting the format of the first quality of service parameter into the format of the quality of service parameter corresponding to the network where the destination node is located is: the gateway node converts the bandwidth information of the mesh network into the bandwidth information of the backbone network Bandwidth information; in the above-mentioned quality of service guarantee method, the method for converting the format of the first quality of service parameter into the format of the quality of service parameter corresponding to the network where the destination node is located is: the gateway node converts the source node priority information into the destination node Node priority information; if the resource reservation technology is used in the mesh network, and the differentiated service is used in the backbone network, then at the gateway node, the resources that need to be reserved for the business are obtained, and the reserved resources are determined according to the required resources. , to map out the priority of the service.

In the above quality of service guarantee method, the format of the first quality of service parameter includes at least one of the following information: bandwidth information of the backbone network; priority information of the source node; type of service to be transmitted; delay requirement of the service to be transmitted; The delay and jitter requirement of the transmission service; the speed requirement of the service to be transmitted; and the priority of the service to be transmitted; the format of the second quality of service parameter includes at least one of the following information: bandwidth information of the mesh network; priority information of the destination node; The type of service to be transmitted; the delay requirement of the service to be transmitted; the delay jitter requirement of the service to be transmitted; the speed requirement of the service to be transmitted; and the priority of the service to be transmitted.

In the above-mentioned quality of service guarantee method, the method for converting the format of the first quality of service parameter into the format of the quality of service parameter corresponding to the network where the destination node is located is: the gateway node converts the bandwidth information of the backbone network into the bandwidth information of the mesh network. bandwidth information.

In the above-mentioned quality of service guarantee method, the method for converting the format of the first quality of service parameter into the format of the quality of service parameter corresponding to the network where the destination node is located is: the gateway node converts the source node priority information into the destination node priority Information, if differentiated services are used in the backbone network, and a resource reservation technology is used in the mesh network, the priority of the service is obtained at the gateway node, and all services are mapped out according to the priority of the service. The amount of reserved resources required.

According to another aspect of the present invention, a quality of service guarantee device is provided, which is used to provide quality of service guarantee for service flow transmission without mesh network, including: a service request module, used to make the source node send a service request to the destination node , requesting to transmit the service flow on the route from the source node to the destination node, where the source node and the destination node are respectively in the mesh network and the backbone network or the source node and the destination node are in the same mesh network, the service request includes the first Quality of service parameter; network judgment module, connected to the service request module, used to make the gateway node receive the service request sent by the source node, judge the source node and the destination node through the relevant information of the source node and the relevant information of the destination node In the same mesh network, or belong to the mesh network and the backbone network respectively; the first quality of service policy module, when the source node and the destination node are in the same mesh network, the transmission of the service flow from the source node to the destination node Provide quality of service guarantee according to the first quality of service parameter; And the second quality of service strategy module, when the source node and the destination node belong to the mesh network and the backbone network respectively, convert the first quality of service parameter into its format corresponding to The second QoS parameter in the QoS parameter format of the network where the destination node is located provides QoS guarantee for the transmission of the service flow from the source node to the destination node according to the first QoS parameter and the second QoS parameter.

In the above-mentioned quality of service guarantee device, the first quality of service strategy module includes: a quality of service analysis module, which is used to enable the gateway node in the mesh network to analyze the quality of service required by the first quality of service parameter; and a bandwidth resource analysis module , which is used to analyze whether the mesh network where the source node and the destination node are located can provide bandwidth resources that meet the quality of service, and provide corresponding services.

In the above-mentioned quality of service guarantee device, the bandwidth resource analysis module includes: a first module for judging whether the source node and the destination node are on the access plane where the gateway node is located; The access plane allocates bandwidth resources that meet the service quality requirements of the service flow for the source node and the destination node. If not, the service request is directly rejected; otherwise, the bandwidth resource is reserved on the access plane and the source node is notified to send the service flow; The second module is used to judge whether the gateway node is connected to the source node but not adjacent to the destination node if the judgment of the first module is no. If not, reject the service request; if yes, further judge whether the bandwidth resources between the gateway node and the next-hop gateway node can meet the service quality requirements of the business according to the path of the business flow , if not, reject the service request, if yes, accept the service request, reserve bandwidth resources for it, and forward the request to the next hop; the third module is used to determine if the second module is no, It is judged that the gateway node is adjacent to the destination node but not adjacent to the source node. If so, it is judged whether the gateway node can allocate bandwidth resources that meet the service quality requirements of the service flow for the destination node on the access plane. If not, the service is rejected. request; if yes, accept the service request and reserve bandwidth resources for it; and a fourth module, used to determine whether the gateway node can neither communicate directly with the source node nor the destination node if the third module judges as no, If so, judge whether the bandwidth resources between the gateway node and the next-hop gateway node can meet the service quality requirements of the business according to the path of the business flow, if not, reject the business request, and if yes, accept the business request for its Reserve bandwidth resources and forward service requests to the next-hop gateway node.

In the above-mentioned quality of service guarantee device, the second quality of service strategy module includes: a downlink business module, used to enable the gateway node to perform parameter mapping from the backbone network to the mesh network if it is a downlink business, and convert the first quality of service parameter Form the second quality of service parameter in the quality of service parameter format of the mesh network, forward the service request containing the second quality of service parameter to the mesh network, and wait for the response from the mesh network. If there is a positive confirmation, the confirmation information of allowing the service is sent to the backbone network, otherwise, the service request from the backbone network is rejected.

In the above-mentioned quality of service guarantee device, the second quality of service policy module includes: an uplink business module, used to make the gateway node judge whether the available bandwidth resource of the link connecting the gateway node to the backbone network meets the requirements of the business if it is an uplink business Bandwidth requirements, if the resource is insufficient, reject the service request, otherwise reserve resources and perform parameter mapping from the mesh network to the backbone network, convert the first quality of service parameter into the second quality of service parameter in the format of the mesh network quality of service parameter , forward the service request containing the second quality of service parameter to the backbone network, and wait for the response from the backbone network. If a positive confirmation from the backbone network is received within the specified time, then send a confirmation message allowing the data to be sent to the mesh network; otherwise, Deny the business request.

In the above-mentioned service quality guarantee device, the format of the first service quality parameter includes at least one of the following information: bandwidth information of the mesh network; priority information of the source node; type of service to be transmitted; delay requirement of the service to be transmitted; The delay jitter requirement of the service to be transmitted; the speed requirement of the service to be transmitted; and the priority of the service to be transmitted; the format of the second quality of service parameter includes at least one of the following information: bandwidth information of the backbone network; priority information of the destination node; The type of service to be transmitted; the delay requirement of the service to be transmitted; the delay jitter requirement of the service to be transmitted; the speed requirement of the service to be transmitted; and the priority of the service to be transmitted.

In the above service quality assurance device, the uplink service module includes: a first converting module, configured to enable the gateway node to convert the bandwidth information of the mesh network into the bandwidth information of the backbone network.

In the above-mentioned service quality assurance device, the uplink business module includes: a second conversion module, configured to enable the gateway node to convert source node priority information into destination node priority information, wherein, if the mesh network uses Resource reservation technology, while differentiated services are used in the backbone network, the resources that need to be reserved by the business are obtained at the gateway node, and the priority of the business is mapped out according to the amount of reserved resources required by the business. The more resources you have, the higher the priority of the business.

In the above-mentioned service quality assurance device, the format of the first service quality parameter includes at least one of the following information: bandwidth information of the backbone network; priority information of the source node; type of service to be transmitted; delay requirement of the service to be transmitted; The delay and jitter requirement of the transmission service; the speed requirement of the service to be transmitted; and the priority of the service to be transmitted; the format of the second quality of service parameter includes at least one of the following information: bandwidth information of the mesh network; priority information of the destination node; The type of service to be transmitted; the delay requirement of the service to be transmitted; the delay jitter requirement of the service to be transmitted; the speed requirement of the service to be transmitted; and the priority of the service to be transmitted.

In the above service quality assurance device, the downlink service module includes: a first converting module, configured to enable the gateway node to convert the bandwidth information of the backbone network into the bandwidth information of the mesh network.

In the above-mentioned service quality assurance device, the downlink business module further includes: a second conversion module, configured to enable the gateway node to convert source node priority information into destination node priority information, wherein, if the backbone network uses DiffServ , while a resource reservation technology is adopted in the mesh network, the priority of the service is obtained at the gateway node, and the amount of reserved resources required is mapped out according to the priority of the service.

Through the above technical scheme, the present invention achieves the following technical effects:

In the present invention, the wireless router performs resource management on the access plane where it is located, and adopts distributed resource management on the transmission plane at the same time. The user equipment in the network parameterizes the QoS requirements of the service flow. On this basis, the wireless router and the gateway node reject the service request in the case of insufficient resources, thereby ensuring the service quality of the existing service.

This method coordinates with the QoS guarantee mechanism in the backbone network, and adopts a mechanism for mapping parameters, so that the parameters in the wireless mesh network and the backbone network can be converted to each other, so as to realize the end-to-end QoS guarantee of the entire network. Compared with the existing wireless Mesh network QoS mechanism, it improves a single logical level, only considers the wireless network part, and adds the mechanism of resource management in the wireless Mesh network and QoS coordination between the wireless network and the backbone network. In this way, end-to-end service quality assurance of the entire network is realized.

Additional features and advantages of the invention will be set forth in the description which follows, and in part will be apparent from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention may be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.

Description of drawings

The accompanying drawings described here are used to provide a further understanding of the present invention and constitute a part of the application. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations to the present invention. In the attached picture:

Figure 1 shows the interconnection architecture of wireless MESH network and IP backbone network;

Fig. 2 shows the QoS architecture diagram in the IPTN in the ITU-T Y.1291 suggestion of related art;

Fig. 3 shows the QoS guarantee method for the business between the wireless Mesh network and the backbone network according to the present invention;

Fig. 4 shows a wireless router processing flow chart when the source node and the destination node are in the same Mesh network according to the present invention;

Fig. 5 has shown when source node and purpose node belong to respectively in Mesh network and backbone network according to the present invention gateway node router processing flowchart; And

Fig. 6 shows a QoS guarantee device for services between a wireless Mesh network and a backbone network according to the present invention.

Detailed ways

The present invention will be described in detail below with reference to FIGS. 3 to 6 .

Fig. 3 shows a QoS guarantee method for services in a wireless Mesh network and between the wireless Mesh network and the backbone network according to the present invention.

As shown in Figure 3, the QoS guarantee method for business between the wireless Mesh network and the backbone network according to the present invention comprises the following steps:

Step S302, the source node sends a service request to the destination node, requesting to transmit the service flow on the route from the source node to the destination node, wherein the source node and the destination node are respectively in a mesh network or a backbone network, and the service request includes a first QoS parameter;

Step S306, when the source node and the destination node are in the same Mesh network, provide QoS guarantee for the transmission of the service flow from the source node to the destination node according to the first QoS parameter; and

Step S308, when the source node and the destination node belong to the mesh network and the backbone network respectively, the first QoS parameter is converted into the second QoS parameter whose format is corresponding to the QoS parameter format of the network where the destination node is located. The transmission from the source node to the destination node provides QoS guarantees according to the first QoS parameter and the second QoS parameter.

In the above-mentioned QoS guarantee method, the service request can also include the relevant information of the source node and the relevant information of the destination node, and the QoS guarantee method can also include step S304 after step 302: after the gateway node receives the service request sent by the source node , judge whether the source node and the destination node are in the same Mesh network, or belong to the Mesh network and the backbone network respectively, according to the relevant information of the source node and the relevant information of the destination node.

Specifically, according to whether the source node and the destination node are in the same wireless mesh network, or in the wireless mesh network and the backbone network separately, the communication between these two nodes can be divided into two types: intra-network communication and inter-network communication. According to whether the inter-network communication is from the wireless mesh network to the backbone network or from the backbone network to the wireless mesh network, the inter-network communication is divided into uplink and downlink.

The specific application of the present invention in the above-mentioned various communication situations will be described in detail below with reference to the accompanying drawings.

Fig. 4 shows a flow chart of wireless router processing when the source node and the destination node are in the same Mesh network according to the present invention.

1. On the wireless router, the processing flow is shown in Figure 4:

Step S402, after receiving the service request, the router analyzes the location of the called user and the service quality parameters related to this service.

Step S404, the router judges whether it is directly connected to the source node of the service.

Step S406, if it is directly connected to the source node, it is judged whether it is directly connected to the destination node.

Step S408, if the wireless router is connected to both the source node and the destination node, it is judged whether the access plane resource at the router meets the QoS requirement of the service.

Step S410, step S408, if yes, reserve bandwidth resources on the access plane, and notify the source node to send the service. Step S428, if not, reject the service request.

Step S412, if the wireless router is only connected to the source node, it is judged whether the bandwidth resource of the access plane can meet the QoS requirement of the service. Step S428, if the service request cannot be rejected.

Step S414, if the wireless router is only connected to the source node, judge whether the bandwidth resource between the current router and the next-hop router meets the QoS requirement of the service according to the route. Step S428, if the service request cannot be rejected.

Step S416, if it is judged in step S414 that the QoS requirement of the service can be met, accept the service request, reserve bandwidth resources for it, and forward the service request to the next-hop wireless router.

Step S418, judging whether the wireless router is directly connected to the destination node.

Step S420, whether sufficient bandwidth resources can be reserved for the destination node on the access plane. Step S428, if not, reject the service request.

In step S422, bandwidth resources are reserved on the access plane for the service, and the source node is notified to send the service.

In step S424 and step S418, if the current router is not directly connected to the destination node, it is judged whether the bandwidth resource between the router and the next-hop router can meet the QoS requirement of the service. Step S428, if not enough, reject this service request.

Step S426, if yes, accept the service request, reserve bandwidth resources for it, and forward the request to the next-hop router.

In step S428, the service request is rejected due to insufficient resources.

FIG. 5 shows a flow chart of gateway node router processing when the source node and the destination node belong to the Mesh network and the backbone network respectively according to the present invention.

On the gateway node, the processing flow is shown in Figure 5:

Step S502, after the gateway node receives the service request, it analyzes the location of the called user and the service quality parameters related to this service;

Step S504, the gateway node judges whether it is the transmission between the backbone network and the mesh network;

Step S506, if it is not a transmission request between the backbone network and the mesh network, it is a service request within the mesh network, and the function completed by the gateway node is the same as that of an ordinary wireless router;

If step S508 is the transmission between the backbone network and the mesh network, it is judged whether it is a downlink service (service from the backbone network to the mesh network);

Step S510, if it is a downlink service, perform parameter mapping between the backbone network and the wireless mesh network, generate a QoS request packet for the wireless mesh network, forward the request packet to the mesh network, and wait for a response from the mesh network;

Step S512, judging whether a positive confirmation from the Mesh network is received within the specified time;

Step S514, if a positive confirmation from the mesh network is received within the specified time, then send a confirmation message of allowing the service to the backbone network; Step S522, otherwise, reject the service request from the backbone network;

Step S516, if it is an uplink service (service from the mesh network to the backbone network), then judge whether the available bandwidth resource of the link connecting the gateway node to the backbone network meets the requirements of the service;

Step S518, if the resource can meet the requirements of the service, reserve the resource and perform parameter mapping between the backbone network and the wireless mesh network, generate a request packet of the relevant service in the Internet backbone network format and send it to the backbone network, and wait Backbone response. Step S522, if the resource is insufficient, reject the service request.

Step S520, judging whether a positive acknowledgment from the backbone network is received within a specified time; Step S514, if a positive confirmation from the backbone network is received within a specified time, then send a confirmation message allowing data transmission to the user; and

Step S522, otherwise, reject the service request.

FIG. 6 shows a QoS guarantee device 600 for services between a wireless Mesh network and a backbone network according to the present invention.

As shown in Figure 6, the service quality assurance device 600 includes:

The service request module 302 is used to make the source node send a service request to the destination node, requesting to transmit the service flow on the route from the source node to the destination node, wherein the source node and the destination node are respectively in the Mesh network or the backbone network, and the service request includes first QoS parameter;

The first QoS policy module 306, when the source node and the destination node are in the same Mesh network, provides QoS guarantee for the transmission of the service flow from the source node to the destination node according to the first QoS parameter; and

The second QoS policy module 308, when the source node and the destination node belong to the Mesh network and the backbone network, convert the first QoS parameter into the second QoS parameter whose format corresponds to the QoS parameter format of the network where the destination node is located, QoS guarantee is provided for the transmission of the service flow from the source node to the destination node according to the first QoS parameter and the second QoS parameter.

In the above-mentioned QoS guarantee device 600, the first QoS policy module 606 may include a QoS analysis module for enabling the gateway node in the Mesh network to analyze the QoS required by the first QoS parameter; and a bandwidth resource analysis module for using It is used to analyze whether the Mesh network where the source node and the destination node are located can provide bandwidth resources that meet QoS, and provide corresponding services.

The bandwidth resource analysis module may include:

The first module is used to determine whether the source node and the destination node are on the access plane where the gateway node is located, and if so, make the gateway node determine whether the source node and the destination node can be allocated QoS that satisfies the service flow on the access plane If the required bandwidth resource is not available, the service request is directly rejected; otherwise, the bandwidth resource is reserved on the access plane and the source node is notified to send the service flow;

The second module is used to judge whether the gateway node is connected to the source node but not adjacent to the destination node if the first module judges as no, and if so, first judge whether the gateway node can allocate sufficient services for the source node on the access plane If the bandwidth resources required by the QoS of the flow are not available, the service request is rejected; if it is possible, it is further judged according to the path of the service flow whether the bandwidth resources between the gateway node and the next-hop gateway node can meet the QoS requirements of the service, If not, reject the service request, if yes, accept the service request, reserve bandwidth resources for it, and forward the request to the next hop;

The third module is used to determine whether the gateway node is adjacent to the destination node but not adjacent to the source node if the judgment of the second module is no; bandwidth resources required by QoS, if not, reject the service request; if possible, accept the service request and reserve bandwidth resources for it; and

The fourth module is used to judge whether the gateway node can neither directly communicate with the source node nor the destination node if the judgment of the third module is no, and if so, judge the gateway node and the next-hop gateway node according to the path of the service flow Whether the bandwidth resources between can meet the QoS requirements of the business, if not, reject the service request, if yes, accept the service request, reserve bandwidth resources for it, and forward the service request to the next-hop gateway node.

The second quality of service policy module 608 may include:

The downlink service module is used for if it is a downlink service, wherein the downlink service means that the source node is in the backbone network and the destination node is in the Mesh network, then perform parameter mapping from the backbone network to the Mesh network, and convert the first QoS parameter into a Mesh network The second QoS parameter in the QoS parameter format of the network, forward the service request containing the second QoS parameter to the Mesh network, wait for the response from the Mesh network, and if it receives a positive confirmation from the Mesh network within the specified time, send it to the backbone network The confirmation information of the allowed service, otherwise, the service request from the backbone network is rejected;

The uplink service module is used to judge whether the available bandwidth resource of the link connecting the gateway node and the backbone network meets the requirements of the service if the uplink service refers to that the source node is in the Mesh network and the destination node is in the backbone network. Bandwidth requirements, if the resources are insufficient, reject the service request, otherwise reserve resources and perform parameter mapping from the Mesh network to the backbone network, convert the first QoS parameter into the second QoS parameter in the QoS parameter format of the Mesh network, and forward it to the backbone network The service request containing the second QoS parameter waits for a response from the backbone network. If a positive confirmation is received from the backbone network within the specified time, then a confirmation message is sent to the Mesh network to allow data transmission, otherwise, the service request is rejected.

In the above-mentioned service quality guarantee device 600, when it is an uplink service, the format of the first service quality parameter may include at least one of the following information: bandwidth information of the mesh network; priority information of the source node; type of service to be transmitted ; the delay requirement of the service to be transmitted; the delay jitter requirement of the service to be transmitted; the speed requirement of the service to be transmitted; and the priority of the service to be transmitted.

The format of the second quality of service parameter may include at least one of the following information: bandwidth information of the backbone network; priority information of the destination node; the type of service to be transmitted; the delay requirement of the service to be transmitted; the delay jitter requirement of the service to be transmitted; The speed requirements of the transmitted traffic; and the priority of the traffic to be transmitted.

In the above-mentioned service quality assurance device 600, the fourth module includes at least one of the following modules: a first conversion module, configured to convert the bandwidth information of the mesh network into bandwidth information of the backbone network; a second conversion module, configured to convert the bandwidth information of the source The node priority information is converted into the destination node priority information. Among them, if the resource reservation technology is used in the mesh network, and the differentiated service is used in the backbone network, then at the gateway node, the service needs to be reserved. Resources, according to the amount of reserved resources required to map out the priority of the business, the more resources the business requires to reserve, the higher the priority of the business.

In the above-mentioned service quality guarantee device 600, when it is a downlink service, the format of the first service quality parameter includes at least one of the following information: bandwidth information of the backbone network; priority information of the source node; the type of service to be transmitted; The delay requirement of the transmission service; the delay jitter requirement of the service to be transmitted; the speed requirement of the service to be transmitted; and the priority of the service to be transmitted.

The format of the second quality of service parameter includes at least one of the following information: bandwidth information of the mesh network; priority information of the destination node; the type of service to be transmitted; the delay requirement of the service to be transmitted; the delay and jitter requirement of the service to be transmitted; The speed requirements of the transmitted traffic; and the priority of the traffic to be transmitted.

In the above-mentioned service quality guarantee device 600, the second module may include at least one of the following modules: a first conversion module, configured to convert the bandwidth information of the backbone network into bandwidth information of the mesh network; a second conversion module, configured to convert The priority information of the source node is converted into the priority information of the destination node. Among them, if the backbone network adopts differentiated services, and a resource reservation technology is adopted in the mesh network, then at the gateway node, the service According to the priority of the business, the number of reserved resources is mapped out.

The service request can also include the relevant information of the source node and the relevant information of the destination node, and the service quality guarantee device 600 can also include: a network judgment module 304, connected to the service request module 302, for making the gateway node receive the information sent by the source node After the service request, judge whether the source node and the destination node are in the same Mesh network, or belong to the Mesh network and the backbone network respectively through the relevant information of the source node and the destination node.

The present invention will be described in detail below by way of examples.

1. Intranet communication

In the network topology shown in FIG. 1 , according to an embodiment, it is assumed that node A wants to send data to node E.

● Node A sends a QoS request packet to wireless router B;

After wireless router B receives the connection request, it first analyzes the destination node, that is, the IP address of node E and the QoS parameters related to this connection, such as bandwidth, delay and service priority;

●Router B can communicate directly with source node A, so router B has to judge whether it is directly connected to the destination node, which is obviously not directly connected to the destination node. Judging whether enough bandwidth resources can be allocated to the source node on the access plane, if not enough bandwidth resources can be allocated, rejecting the service request;

● If wireless router B judges that enough bandwidth resources can be allocated on the access plane, it further judges whether the bandwidth resources between wireless router C and wireless router C can meet the QoS requirements of the service. If not, router B will reject this service request. If yes, router B will accept the service request and forward the request to router C;

After router C receives the request, it first analyzes the destination node, that is, the IP address of node E and the QoS parameters related to this connection, such as bandwidth, delay and service priority;

●The router can of course determine that it is neither directly connected to the source node nor directly connected to the destination node. Then it is judged whether the bandwidth resources between the next-hop wireless router D can satisfy the QoS request of the service. If not, then reject the service request, if possible, router C reserves bandwidth resources and forwards the request to wireless router D;

After router D receives the request, it first analyzes the destination node, that is, the IP address of node E and the QoS parameters related to this connection, such as bandwidth, delay and service priority; and

●Router D can judge that this router is directly connected to the destination node E based on these information, so it only judges whether enough bandwidth resources can be allocated on the access plane, if not, it rejects the service request, if it can, in The bandwidth resource is reserved on the access plane, and the source node is notified to send the service.

2. Inter-network communication

2.1 Inter-network communication (downlink)

In the network topology shown in FIG. 1 , according to an embodiment, it is assumed that node G in the backbone network wants to send data to node A in the Mesh network.

●First, node G sends the service request packet to the edge router H adjacent to the backbone network, and then forwards it to the edge router I adjacent to the wireless Mesh gateway through the IP backbone network, and the edge router I of the IP backbone network sends the IP connection request packet (resource The Path message of the reservation protocol (RSVP: Resource Reservation Protocol) is sent to the gateway F in the Mesh network;

●When there is a service flow that needs to use bandwidth resource reservation to establish a path from a source node in an IP network to a destination node in a Mesh network, the gateway node will receive a Path message. For the specific format of the Path message, see IETF RFC 2205. Among them, The business characteristics of the sender data flow are given in <SENDER_TSPEC>;

After the gateway node receives this request, take the value of Peak Data Rate as the bandwidth required by the service flow, and use the bandwidth of the global routing request message (the message format is the QoS routing protocol of the clustered Mesh network given by the related technology) The request field is set to the value of Peak Data Rate to carry out the pathfinding process in the Mesh network. At the same time, cache the path message. This completes the parameter mapping from the wireless mesh network to the backbone network. For example, differentiated services are used in the backbone network, while a resource reservation technology is used in the wireless mesh network. At the gateway node, Get the priority of the service, and map out the required reserved resources according to the priority of the service. Obviously, the more resources the service requires, the QoS can still be guaranteed after the service enters the wireless mesh network. In this process, no matter what kind of QoS is used in the wireless mesh network and the backbone network, the mapping is completed based on the principle of equivalently guaranteeing the QoS of the service under the new mechanism after the service enters the new network domain;

● If the gateway node successfully receives the positive message from the wireless Mesh network within the specified time, please refer to RFC 2205 for the message format. Which contains the <FLOWSPEC> object. For controllable services, the value of the <FLOWSPEC> object uses the value of the field with the same name in the cached path message. For guaranteed services, in addition to the <FLOWSPEC> field containing controllable services, the <FLOWSPEC> object also includes two other fields: Rate and Slack Term. The values of these two fields are set according to the content of the path message. For specific methods, see IETF RFC 2212. Then the wireless Mesh gateway F sends information to the source terminal user of the IP backbone network to allow sending data; and

● If the global routing reply message is not successfully received within the specified time, the gateway node sends an Error Message to the source terminal user. Notify that the reservation is unsuccessful;

2.2 Inter-network communication (uplink)

In the network topology shown in FIG. 1 , according to an embodiment, it is assumed that node A wants to send data to node G in the backbone network.

●First, node A sends a connection request packet to wireless router B;

After wireless router B receives the connection request packet, it first analyzes the IP address of the destination node, that is, node E, and the QoS parameters related to this connection, such as bandwidth, delay and service priority;

●Router B can communicate directly with source node A, so router B needs to judge whether the resources of its own access plane can meet the QoS requirements of this connection. If the QoS requirements of this connection cannot be met, the connection request is directly rejected. In this example, we assume that the resources of the access plane can meet the QoS requirements of this connection, so wireless router B then reserves the resources of the access plane of router B for this connection;

●Router B can communicate directly with source node A, so router B has to judge whether it is directly connected to the destination node, which is obviously not directly connected to the destination node. Judging whether enough bandwidth resources can be allocated to the source node on the access plane, if not enough bandwidth resources can be allocated, rejecting the service request;

● If the wireless router B judges that enough bandwidth resources can be allocated on the access plane, it further judges whether the bandwidth resources between the wireless router B and the wireless Mesh gateway F can meet the QoS requirements of the service. If not, router B will reject this service request. If yes, router B will accept the service request and forward the request to wireless mesh gateway F;

●After receiving the connection request packet, the wireless gateway node F first analyzes the IP address of the destination node, node E, and the QoS parameters related to this connection, such as bandwidth, delay and service priority. Of course, the wireless mesh gateway node F can determine that this request is a request sent to the IP backbone network, that is, an uplink request;

●Wireless Mesh gateway F judges whether the link connected to the IP backbone network can satisfy the QoS of the requested service. If not, deny the request. If possible, reserve resources and perform parameter mapping between the backbone network and the wireless Mesh network to generate a request packet for related services in the format of the Internet backbone network. The gateway node regards the service flow as a guaranteed service and uses the bandwidth requested by the service flow Initialize the <SENDER_TSPEC> object of the path message. Send to the nearby edge router I in the backbone network, and wait for the response of the backbone network. Wherein, the above-mentioned mapping includes, for example, a resource reservation technology is adopted in the wireless mesh network, while differentiated services are adopted in the backbone network, then at the gateway node, the resources that need to be reserved for the business are obtained, and according to the requirements The amount of reserved resources is used to map the priority of the service. Obviously, the more resources the service requires, the higher the priority of the service. In this way, QoS can still be guaranteed after the service enters the backbone network. In this process, no matter what kind of QoS is used in the wireless mesh network and the backbone network, the mapping is completed based on the principle of equivalently guaranteeing the QoS of the service under the new mechanism after the service enters the new network domain. ;as well as

● If the confirmation information of the backbone network can be received within the specified time, the source node is notified to send data, otherwise, the request is rejected.

From the above description, it can be seen that the present invention has achieved the following technical effects:

In the present invention, the wireless router performs resource management on the access plane where it is located, and adopts distributed resource management on the transmission plane at the same time. The user equipment in the network parameterizes the QoS requirements of the service flow. On this basis, the wireless router and the gateway node reject the service request in the case of insufficient resources, thereby ensuring the service quality of the existing service.

This method coordinates with the QoS guarantee mechanism in the backbone network, and adopts a mechanism for mapping parameters, so that the parameters in the wireless mesh network and the backbone network can be converted to each other, so as to realize the end-to-end QoS guarantee of the entire network. Compared with the existing wireless Mesh network QoS mechanism, it improves a single logical level, only considers the wireless network part, and adds the mechanism of resource management in the wireless Mesh network and QoS coordination between the wireless network and the backbone network. In this way, end-to-end service quality assurance of the entire network is realized.

Obviously, those skilled in the art should understand that each module or each step of the above-mentioned present invention can be realized by a general-purpose computing device, and they can be concentrated on a single computing device, or distributed in a network formed by multiple computing devices Optionally, they can be implemented with program codes executable by a computing device, so that they can be stored in a storage device and executed by a computing device, or they can be made into individual integrated circuit modules, or they can be integrated into Multiple modules or steps are fabricated into a single integrated circuit module to realize. As such, the present invention is not limited to any specific combination of hardware and software. It should be understood that changes in these specific implementations are obvious to those skilled in the art and do not depart from the spirit protection scope of the present invention.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims (22)

1. a quality of service guarantee method, for providing the quality of service guarantee for the business stream transmission of wireless mesh network, it is characterized in that, may further comprise the steps: Step a, the source node sends a service request to the destination node, requesting to transmit the service flow on the route from the source node to the destination node, wherein the source node and the destination node are respectively in the mesh network and the backbone network Or the source node and the destination node are in the same mesh network, and the service request includes a first quality of service parameter; After the gateway node receives the service request sent by the source node, it judges that the source node and the destination node are in the same mesh network based on the relevant information of the source node and the relevant information of the destination node , or belong to the mesh network and the backbone network respectively; Step b, when the source node and the destination node are in the same mesh network, the transmission of the service flow from the source node to the destination node is performed according to the first quality of service parameter Provide service quality assurance; and Step c, when the source node and the destination node belong to the mesh network and the backbone network respectively, convert the first quality of service parameter into a format corresponding to the destination node's The second QoS parameter in the QoS parameter format of the network provides QoS guarantee for the transmission of the service flow from the source node to the destination node according to the first QoS parameter and the second QoS parameter. 2. service quality guarantee method according to claim 1, is characterized in that, described step b comprises the following steps: Step b1, the gateway node in the mesh network analyzes the QoS required by the first QoS parameter; and Step b2, analyzing whether the mesh network where the source node and the destination node are located can provide bandwidth resources satisfying the service quality, and provide corresponding services. 3. service quality guarantee method according to claim 2, is characterized in that, described step b2 comprises the following steps: judging whether the source node and the destination node are both on the access plane where the gateway node is located, If so, the gateway node judges whether it can provide bandwidth resources that meet the quality of service on the access plane, and if not, directly rejects the service request; otherwise, reserves bandwidth on the access plane resources and notify the source node to send the service flow; Otherwise, judging whether the gateway node is connected to the source node but not adjacent to the destination node, If so, first judge whether the gateway node can allocate bandwidth resources that meet the service quality requirements of the service flow for the source node on the access plane, if not, then reject the service request; if yes, then according to The path of the business flow further judges whether the bandwidth resources between the gateway node and the next-hop gateway node can meet the service quality requirements of the business, if not, reject the service request, and if yes, accept the service request, for It reserves bandwidth resources and forwards requests to the next hop; Otherwise, judging whether the gateway node is adjacent to the destination node but not adjacent to the source node, If yes, then determine whether the gateway node can allocate bandwidth resources that meet the service quality requirements of the service flow for the destination node on the access plane, if not, reject the service request; if yes, then accepting the service request and reserving bandwidth resources for it; and Otherwise, determine whether the gateway node can neither communicate directly with the source node nor the destination node, and if so, determine the link between the gateway node and the next-hop gateway node according to the path of the service flow. Whether the bandwidth resources can meet the quality of service requirements of the business, if not, reject the business request, if yes, accept the business request, reserve bandwidth resources for it, and forward the business request to the next-hop gateway node business request. 4. the service quality guarantee method according to claim 1, is characterized in that, described business is downlink business, and described step c comprises: Step c1, the gateway node performs parameter mapping from the backbone network to the mesh network, and converts the first quality of service parameter into the second quality of service parameter in the quality of service parameter format of the mesh network , forwarding the service request including the second quality of service parameter to the mesh network, and waiting for a response from the mesh network, If a positive confirmation from the mesh network is received within a specified time, then a confirmation message for allowing the service is sent to the backbone network, Otherwise, reject the service request from the backbone network. 5. The service quality assurance method according to claim 1, wherein said service is an uplink service, and said step c comprises: Step c2, the gateway node judges whether the available bandwidth resource of the link connecting the gateway node to the backbone network meets the bandwidth requirement of the service, If resources are insufficient, rejecting the service request, Otherwise, reserve resources and perform parameter mapping from the mesh network to the backbone network, convert the first quality of service parameter into the second quality of service parameter in the quality of service parameter format of the mesh network, and send forwarding, by the backbone network, the service request including the second quality of service parameter, and waiting for a response from the backbone network, If a positive acknowledgment from the backbone network is received within a specified time, then send a confirmation message allowing data transmission to the mesh network, Otherwise, reject the service request. 6. The service quality assurance method according to claim 5, characterized in that, The format of the first quality of service parameter includes at least one of the following information: bandwidth information of the mesh network; Priority information of the source node; the type of traffic to be transmitted; Latency requirements for the traffic to be transmitted; The delay and jitter requirements of the service to be transmitted; the speed requirements of the traffic to be transmitted; and the priority of the traffic to be transmitted; The format of the second quality of service parameter includes at least one of the following information: bandwidth information of the backbone network; Priority information of the destination node; the type of traffic to be transmitted; Latency requirements for the traffic to be transmitted; The delay and jitter requirements of the service to be transmitted; the speed requirements of the traffic to be transmitted; and The priority of the service to be transmitted. 7. The quality of service guarantee method according to claim 6, wherein the method for converting the format of the first quality of service parameter into the format of the quality of service parameter corresponding to the network where the destination node is located is: The gateway node converts the bandwidth information of the mesh network into the bandwidth information of the backbone network; 8. The quality of service guarantee method according to claim 6, wherein the method for converting the format of the first quality of service parameter into the format of the quality of service parameter corresponding to the network where the destination node is located is: converting the source node priority information into the destination node priority information by the gateway node; If the resource reservation technology is used in the mesh network, and differentiated services are used in the backbone network, then at the gateway node, the resources that need to be reserved for the business are obtained, and the reserved resources are obtained according to the required reservation resources to map out the priority of the business. 9. The service quality assurance method according to claim 4, characterized in that, The format of the first quality of service parameter includes at least one of the following information: bandwidth information of the backbone network; Priority information of the source node; the type of traffic to be transmitted; Latency requirements for the traffic to be transmitted; The delay and jitter requirements of the service to be transmitted; the speed requirements of the traffic to be transmitted; and the priority of the traffic to be transmitted; The format of the second quality of service parameter includes at least one of the following information: bandwidth information of the mesh network; Priority information of the destination node; the type of traffic to be transmitted; Latency requirements for the traffic to be transmitted; The delay and jitter requirements of the service to be transmitted; the speed requirements of the traffic to be transmitted; and The priority of the service to be transmitted. 10. The quality of service guarantee method according to claim 9, wherein the method for converting the format of the first quality of service parameter into the format of the quality of service parameter corresponding to the network where the destination node is located is: The gateway node converts the bandwidth information of the backbone network into bandwidth information of the mesh network. 11. The quality of service guarantee method according to claim 9, wherein the method for converting the format of the first quality of service parameter into the format of the quality of service parameter corresponding to the network where the destination node is located is: converting the source node priority information into the destination node priority information by the gateway node, If differentiated services are used in the backbone network, and a resource reservation technology is used in the mesh network, then at the gateway node, the priority of the service is obtained, and according to the priority of the service , to map out the amount of reserved resources required. 12. A quality of service guarantee device, used for providing quality of service guarantee for the service flow transmission of wireless mesh network, it is characterized in that, comprising: A service request module, configured to enable a source node to send a service request to a destination node, requesting to transmit a service flow on a route from the source node to the destination node, wherein the source node and the destination node are respectively in a mesh network and the backbone network or the source node and the destination node are in the same mesh network, and the service request includes a first quality of service parameter; A network judging module, connected to the service request module, configured to enable the gateway node to judge the source node based on the relevant information of the source node and the relevant information of the destination node after receiving the service request sent by the source node. Whether the node and the destination node are in the same mesh network, or belong to the mesh network and the backbone network respectively; The first quality of service policy module, when the source node and the destination node are in the same mesh network, transmit the service flow from the source node to the destination node according to the first quality of service parameters to provide quality of service guarantees; and The second quality of service policy module, when the source node and the destination node belong to the mesh network and the backbone network respectively, convert the first quality of service parameter into a format corresponding to the destination The second quality of service parameter in the quality of service parameter format of the network where the node is located, the transmission of the service flow from the source node to the destination node is provided according to the first quality of service parameter and the second quality of service parameter Service quality assurance. 13. The quality of service guarantee device according to claim 12, wherein the first quality of service policy module comprises: A quality of service analysis module, configured to enable gateway nodes in the mesh network to analyze the quality of service required by the first quality of service parameter; and A bandwidth resource analysis module, configured to analyze whether the mesh network where the source node and the destination node are located can provide bandwidth resources that meet the quality of service, and perform corresponding services. 14. The quality of service guarantee device according to claim 13, wherein the bandwidth resource analysis module comprises: The first module is used to determine whether the source node and the destination node are both on the access plane where the gateway node is located, and if so, make the gateway node determine whether it can be on the access plane for all The source node and the destination node allocate bandwidth resources that meet the service quality requirements of the service flow, if not, directly reject the service request; otherwise, reserve bandwidth resources on the access plane and notify the The source node sends the service flow; The second module is used to judge whether the gateway node is connected to the source node but not adjacent to the destination node if the judgment of the first module is no, and if so, first judge whether the gateway node can Allocate bandwidth resources that meet the service quality requirements of the service flow for the source node on the access plane, if not, reject the service request; Whether the bandwidth resources between one-hop gateway nodes can meet the service quality requirements of the business, if not, reject the service request, if yes, accept the service request, reserve bandwidth resources for it, and go to the next jump send request; The third module is used for judging whether the gateway node is adjacent to the destination node but not adjacent to the source node if the judgment of the second module is no, and if yes, judging whether the gateway node is in the The access plane allocates bandwidth resources that meet the service quality requirements of the service flow for the destination node, and if not, rejects the service request; if yes, accepts the service request and reserves bandwidth resources for it ;as well as The fourth module is configured to judge whether the gateway node can neither directly communicate with the source node nor the destination node if the judgment of the third module is no, and if so, according to the traffic flow The path judges whether the bandwidth resources between the gateway node and the next-hop gateway node can meet the quality of service requirements of the business, if not, reject the service request, and if yes, accept the service request and reserve it for it bandwidth resources, and forward the service request to the next-hop gateway node. 15. The quality of service guarantee device according to claim 12, wherein the second quality of service policy module comprises: A downlink service module, configured to enable the gateway node to perform parameter mapping from the backbone network to the mesh network if it is a downlink service, and convert the first quality of service parameter into the service quality of the mesh network The second quality of service parameter in a parameter format, forwarding the service request including the second quality of service parameter to the mesh network, and waiting for a response from the mesh network, If a positive confirmation from the mesh network is received within a specified time, then a confirmation message for allowing the service is sent to the backbone network, Otherwise, reject the service request from the backbone network. 16. The quality of service guarantee device according to claim 12, wherein the second quality of service policy module comprises: an uplink service module, configured to enable the gateway node to judge whether the available bandwidth resource of the link connecting the gateway node to the backbone network meets the bandwidth requirement of the service if it is an uplink service, If resources are insufficient, rejecting the service request, Otherwise, reserve resources and perform parameter mapping from the mesh network to the backbone network, convert the first quality of service parameter into the second quality of service parameter in the quality of service parameter format of the mesh network, and send forwarding, by the backbone network, the service request including the second quality of service parameter, and waiting for a response from the backbone network, If a positive acknowledgment from the backbone network is received within a specified time, then send a confirmation message allowing data transmission to the mesh network, Otherwise, reject the service request. 17. The service quality assurance device according to claim 16, characterized in that: The format of the first quality of service parameter includes at least one of the following information: bandwidth information of the mesh network; Priority information of the source node; the type of traffic to be transmitted; Latency requirements for the traffic to be transmitted; The delay and jitter requirements of the service to be transmitted; the speed requirements of the traffic to be transmitted; and the priority of the traffic to be transmitted; The format of the second quality of service parameter includes at least one of the following information: bandwidth information of the backbone network; Priority information of the destination node; the type of traffic to be transmitted; Latency requirements for the traffic to be transmitted; The delay and jitter requirements of the service to be transmitted; the speed requirements of the traffic to be transmitted; and The priority of the service to be transmitted. 18. The service quality assurance device according to claim 17, wherein the uplink service module comprises: The first conversion module is configured to enable the gateway node to convert the bandwidth information of the mesh network into bandwidth information of the backbone network. 19. The service quality assurance device according to claim 17, wherein the uplink service module comprises: The second conversion module is configured to enable the gateway node to convert the source node priority information into the destination node priority information, wherein, if the resource reservation technology is adopted in the mesh network, and The backbone network adopts differentiated services, then at the gateway node, the resources that need to be reserved by the business are obtained, and the priority of the business is mapped according to the amount of reserved resources required, and the resources required by the business to be reserved The more, the higher the priority of the business. 20. The service quality guarantee device according to claim 14, characterized in that: The format of the first quality of service parameter includes at least one of the following information: bandwidth information of the backbone network; Priority information of the source node; the type of traffic to be transmitted; Latency requirements for the traffic to be transmitted; The delay and jitter requirements of the service to be transmitted; the speed requirements of the traffic to be transmitted; and the priority of the traffic to be transmitted; The format of the second quality of service parameter includes at least one of the following information: bandwidth information of the mesh network; Priority information of the destination node; the type of traffic to be transmitted; Latency requirements for the traffic to be transmitted; The delay and jitter requirements of the service to be transmitted; the speed requirements of the traffic to be transmitted; and The priority of the service to be transmitted. 21. The service quality guarantee device according to claim 20, wherein the downlink service module comprises: a first conversion module, configured to enable the gateway node to convert the bandwidth information of the backbone network into the network bandwidth information of the backbone network. The bandwidth information of the mesh network. 22. The service quality guarantee device according to claim 20, wherein the downlink service module further comprises: a second converting module, configured to enable the gateway node to convert the source node priority information into the Destination node priority information, wherein, if the backbone network adopts DiffServ and the mesh network adopts a resource reservation technology, then at the gateway node, the service Priority, according to the priority of the business, to map out how many resources are required to be reserved.

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