Application layer group broadcasting method with integrated type and distributed type combination

Application layer multicasting method for central and distributed communication

technical field

The invention belongs to network technical field, referring to the network multicast process and application layer is technology. The background process of recent years along with the popularization of network, and bandwidth lifting, providing a video and multimedia applications of audio a high bandwidth need to provide the possibility through the network. The present usual for providing a special trunk is each user. A between the information broadcast of the traditional unicast groove; internationally claims an application layer multicast's thought to reduce the charging, which the extension. For using the multicast layer; the end stability and performance body is a router, wherein a created the application layer multicast body is a network layer multicast the stability and efficiency. How which the application layer multicast the stability and extensible provided academic of heat topic.

Application layer protocol multicast's with multiple. Performing classifying different from different angle. And according to the computer of data forwarding tree is centralized of 1:00 of each content distribution computation, and is divided into the central and distributed two or more. The central power of the design is simple, a convergence rate of fast, further formed with the single fault point, current charging-discharging performance fault tolerance is a redundancy. The groove representative is ALMI. ALMI suitable for small medium multicast application; the multicast and control node and a node. Of joining control node centralized management member, an with the computer for multicast tree. And the computer for multicast tree requires member each wireless sensing network topology high-speed circulation control node. Of distributed representative with Narada, NICE, Yoid equal. A Namda, comprising a obtaining multiple member nodes, methods are connected; between the solution to delete connecting part u circulation detecting evening of the fifteenth antenna of the first lunar month ends uselessly, increases novel connector. Of forming a Mesh network, and routing protocol for multicast tree between nodes.

The full is a node and is divided into proxy and equality. Proxy is reflected servers distributed in multiple policy relevant positions, wherein the general area is more than with multiple nodes, forming multicast tree based on them, wherein power of the stability of good, a performance of high; and flexible reducing, moreover easily to form the system bottleneck; the plan's representative with Overcast, ScatterCast. The Overcast design is used for providing a bandwidth a multicast application, and improving bandwidth utilization rate. How ScatterCast mainly aim at to massively, a heterogeneous user providing multicast service.

To the introduces hierarchical and hives of which the extendibility be divided into hierarchization and non-hierarchization. The capacitor of hierarchization with NICE, ZIGZAG. The majority of group member the bottom located at has double-layer structure, only with the contact with the fixed at number's nodes; the large reduced the majority for multicast member processing overhead messages. The main difference of NICE and is Zigzag: In a variety, a variety management and data distribution of ZigZag is completes of different node; and two functions of NICE and in a node.

First constructing Mesh network be divided into tree according to achievements the first first and second Network. Tree first is a first component data forwarding tree, for fault-tolerant consideration side and is not father node's node of the guide connection, and control structure. Based on the groove is Yoid, Overcast, SwitchTree equal. Network first first forming Mesh network and forming a data forwarding tree based on, to Narada. Generally tree first capacitor delay flowing is greater than the Mesh first capacitor, and Network and scheme the fault tolerance flowing strong in tree and scheme. And the Seat structure extendibility universal is not good.

The invention claims a multilevel, stable application layer is: CBroadcast. The capacitor is suitable for application layer is multicast of simple source and application; the common control and distributed, and application layer and multicast network layer multicast handle, improving extendibility, the maximization enhanced the user for network a support, reduced the charging, solved network television is high to the stable requirement and application layer network white/UV transilluminator is arranged with, wherein the stable application layer multicast key technology.

invention content

Target of the is invention claims a multilevel, stable application layer is multicast: CBroadcast. Method mentality of the present disclosure propose characterized in that: For managing hierarchical console, the connecting multiple types of multicast technologies in stable and its requirements, is divided into the following four point to: 1st; And the central and distributed handle, using type node is takes for constructional maintenance of the lower layer multicast tree, the lower carcass application layer structure for distributed to the sharpen multicast tree power and stability of the based protocol; 2nd, And thought for layer and hives of which user, a charging; 3rd, And a Network and scheme, constructing Mesh network, first based on the generated data forwarding tree to satisfy the real-time, application4th, Application layer and multicast network layer multicast hanging, a display the network layer multicast coefficients and a and can.

The invention characterized in that: The method for realizing the following hierarchical network structure, the same hierarchical network structure and following 3 layers: The ultra network node is a ultra nodes point to point the unicast groove by a network formed, wherein the node of the first distribution supply recent type node, the ultra node network topology memory information in issuing the source, nodeThe network cluster is composed of 10 to 20 AND multicast island nodes from an application layer and a based, formed in the IP multicast islands midspan an application layer multicast transmission tree, the tree of node is an IP multicast island of network cluster a cluster and selecting of acclamation represents node, wherein the representative node from the width less node for acquiring data, and retransmits in cluster the network and IP multicast island nodes, a a Network, structureThe IP multicast island is a subscriber group, which is supporting the multicast are the large or medium network, each AND multicast island selecting of acclamation a user to form a multicast island's representative node, the node for IP multicast receiving and transmitting data; The 3) composed as issuing the source and tree root's application layer forwarding tree; The distribution source and type node, the ultra node and cluster network represents between nodes with traditional client/server mould, wherein the network cluster a ring represent between the two AND multicast islands with the UDP protocol unicast the connecting ring, the Connection Embankment weight of a wherein two nodes comprising the same or available bandwidth ring of measuring unicast; The network cluster further comprises by a variety controller for entity program, and entity movement in cluster network width less node, wherein said controller for improving is a unitary condition Mesh network information, and is takes for taking the network cluster to construct a layer short-path tree on behalf of the node and root of the Mesh network members, wherein for session data of the transmitting multicast distribution tree, and unicast connected with the control information and a network cluster the member between the controller and behalf of the node of the cluster network and; transmission

The application layer multicasting method of this invention is according to the following steps is realized in network hierarchical structure of the centralized control and distributed transmission and two layers: 1. To the ultra node controller input distribution supply node protocol; addresses2. A node A linkage part multicast tree and filled with 3 to a controller, transmission and a part of multicast tree message operating order 8, the

3. A node A with the electric network cluster multicast tree and multicast island, which directly engages the multicast recess; Otherwise continuously tail end; a4. A node for a request to the distribution supply first node, obtaining type listing node, the selecting retards below the minimum type node and ultra node the network cluster are connected; 5. A node engages the network cluster a Network, networka node) and A output end of the arm Mesh network information to the controller, request indicator engages the Mesh network of cluster controller; andb) cluster controller is related in response message current loop Mesh network and IP address tabulations of the communicating, and updating message to the wireless transmission group member; the IP address list (c) node A base, obtaining said unicast the detentions of the communicating, and measuring result sealing to transmit the rotating message of the periodicity provided with a controller, wherein a message comprises a IP addresses of each member, is as follows message in the vector information tabulations of the serial sheets; each members and nodes; the d) cluster controller is a message, a Mesh network topology information for updating local maintaining, a Mesh network topology information updating of the unicast form in the communicating to Network, network6. A controller calculates the father node, wherein A node to arm for multicast tree; a node) and A linkage the support for multicast tree to arm tree message to the transmission: Message in a distribution supply IP address; b) controller node calculates The father node and subnode in multicast tree, package and related tree response message transmission to A node, simultaneously change the shape of tree structure of interdependent node with updating tree message notification same; clusterthe c) node A father node receiving updating information tree power, A node thereof to subnode list of. A node A subnode receiving updating information tree power, A node thereof to father node list, simultaneously engages the father node message to a node A transmission; the d) node A receiving engages the father a node, indicated the arm for multicast tree is successful; 7. And the overtime limiting is not used father node; and direct type selection node and father node, node and A with the network cluster to represent node at the time, the siamesed end of: process8. A node of all multicast tree system for sending; a node) is A tree message to controller; transmission7

b) The controller for informing A node father node, tabulates from wherein subnode deletes mark of A node; and network cluster of the behalf a node, the cluster controller using network cluster to represent node in cluster, networkc) are node of tree response message to a node A transmission; 9. Informing cluster controller of the Seat, networka node) is A a Mesh network message notification a variety controller, transmission and starting a timer; b) cluster controller updating the Mesh network topology information local for maintaining, deletes node A communication node and a link node of A connection, and information broadcasting device of A to the other nodes of Mesh network, to a node A transmission confirmed of the node of A a Mesh network response message; c), and a timer, overtime is not received is of a Mesh network response message, node and A redundancy of the Mesh network information to the controller, power receiving till is of a Mesh network response message; The test simulation respectively connected with the CBroadcast protocol simulation the main key confirm to the CBroadcast protocol finally wherein a achieve the objective and. The invention compares the CBroadcast protocol and Narada protocol in wire is myns simulator. The test using 1000 nodes a random charts, node middle value of degrees is 5. Random node and a part of node for application layer multicast tree from the position, and is 100 charts' analogue result averaging values, straight line shape 4 to firmly on digital 6 conclusion.

A good using multicast layer is the is connected to the ensuring consistency between datum data-path quality the. The application layer multicast data path's of usually and following two parameters to weigh: Intensity and extensible. Digital 4 the research is a transmission of CBroadcast direction; X shaft unit and a serial number of application layer multicast set. Random node and 500 node for application layer multicast tree from position, compared with two machine time delays: CBroadcast and Narada. A see a shape of 4 CBroadcast is similar to Narada the node transmission time delay performance, is a Narada conclusion CBroadcast, and further obtain a network layer comparable multicast performance.

The user arm and two CBroadcast time is appraise a multicast by using gate attribute. Engages the time delay parts is: The user arm the application layer multicast set of obtaining the data time. Engages the time delay of the application layer multicast with a gate parameter, pre-processing machine of application layer multicast obtaining widespread method, related time delay claim enough low. Engages the time delay which the user experience of application layer is multicast water-blocking to a great has, relative to the upstream node failure the effect on the downstream node. Digital 5 unit for lapping of CBroadcast to research for extending, X shaft unit and a serial number of application layer multicast set. Random node and 200 nodes from the image forming the application layer multicast group; compared with two lapping machine delays time. A bars from the position, the CBroadcast lapping time delay is lower than Narada of the. Digital 6 studies the CBroadcast departure time delay condition, X shaft unit and a serial number of application layer multicast set. Random node and 200 nodes from the image forming the application layer multicast group; compared with CBroadcast and Narada departure time delay. The test indicated according CBroadcast of the time delay Narada and a node node is similar.

The tested PlanetLab online realizing prototyping system of CBroadcast, a prototyping system comprises a PlanetLab testing network almost the active nodes, which is used for learning CBroadcast the stability and protocol overhead messages in real network. The test environment configuration is as follows: The communicating arm the CBroadcast multicast set at initial 100 seconds random, a random departure and 120 minutes. the data pool default transmission speed is 300Kbps.

The CBroadcast the majority of control information is a state information of between nodes of, an information is occurred in Cluster, therefore the Appearance node and possibly with a gate attribute according affects the overhead messages protocol. Digital 7 a given middle protocol overhead messages to the middle Cluster node for exchanging function. Coloured, which is Set prolonging medium, protocol overhead messages along with a capacity, and a data service, the protocol overhead messages is very low.

Maintaining data stability is a CBroadcast preset key, a appraise the data stability of CBroadcast, we defined direct-current power C/, C/is a data and a sending end transmitting data ratio of the user line. Digital 8 a given node middle direct-current power to the middle Cluster node for exchanging function. A see a digital 8 for improving continuity along with the reinforced of scale Cluster, wherein each user node with more nodes father be for selecting.

Brief description for drawings

Digital 1 CBroadcast network frame type node protocol multicast island image 2 an IP multicast network multicast Ludang multicast island representative node C.Broadcast user non-CBroadcast austere household charts the CBroadcast 3 CBroadcast is working current; Digital 4 CBroadcast and Narada node transmission time delay;

Digital 5 CBroadcast and Narada node engages the time delay;

Digital 6 CBroadcast and Narada node of the time delay;

Digital 7 CBroadcast protocol: overhead messages9

Port 10 nodes ■ 20 nodes splitting 50 node STRUCTURE IOO node S3150 node n 200 charts node 8 data of the continuity CBroadcast: A port io node ■ 20 nodes splitting 50 B100 node node S150 node D 200 node detailed description of illustrated embodiments of CBroadcast, network topology are divided is 3: aUltra network node, network cluster and multicast island. The ultra network node is arranged between the ultra nodes forming a network via the point to point unicast groove; the distance distribution supply recent type node of the central network node. With the network cluster is 10-20 multicast island nodes parts (sees), forming an application layer network from a based, a called cluster. A user the midspan an application layer multicast transmission tree. A variety elects a variety network represent to a node, the network cluster represents node from the ultra node for acquiring data, retransmits and is in cluster other user. The network cluster represents node is in cluster the network application layer multicast transmission tree tree are. The IP multicast island of the supporting AND multicast are the large or medium network, it can be a host, an Ethernet, campus network equal. A present's of host wherein an IP multicast (is tenable to Windows operating) system. A in IP multicast recess; the main machine for IP multicast to/receiving data transmission. In a CBroadcast broadcasting method, each AND multicast island a selected from user to form a multicast island representative node. The CBroadcast network structure drawing to have digital 1 cooling: A see is attached l shape, CBroadcast is a hierarchization, tree-based application layer protocol multicast. Which is a as issuing source and tree root's application layer forwarding tree, transferring tree surface of the ultra network node, the ultra node and publishing source is connected unicast. Forwarding tree and is a variety network, a variety composed of 10 to 20 islands multicast; each cluster elects of represents node network cluster represent to a node, the network cluster represents node from part is node for acquiring data, a transmission to a variety the multicast islands.

Multicast the recess structure drawing to have digital 2 are. The different islands multicast channel UDP connected in multicast island representative node multicast island representative nodes. The data of sealing the UDP structure, transmitted from a multicast island's representative node to the island's representative node. The once multicast island receiving data UDP, represents node the UDP for data package, and transmitting through the IP multicast island to the other user nodes. The network structure seen in multicast island sees the auxiliary digital 2.

The CBroadcast system frame, eight of the source and type node, the ultra node and cluster network represent between nodes with the traditional C/S model, therefore, elects a good representative node in each cluster housing; and midspan small, the efficient application layer multicast network is the successful key. Each cluster with a variety controller, joining of centralized management cluster member, an with the maintenance of cluster structure, and calculates to the network cluster to represent node and root application layer multicast tree. Each cluster member, linkage

An claim inform the cluster controller. Between each cluster member is a Seat structure of connector, a cycle in the contacted with the communicating the link to inform the cluster controller.

A a simply lapping of CBroadcast how processing group member, an and failure detection. The wireless power to associate with the following steps: And the node with the CBroadcast in multicast island, which directly engages the multicast island, otherwise the node and multicast island representative node to arm CBroadcast. A light request to the distribution supply first node, obtaining type node, listing selecting the ultra node, and selecting multiple varieties of under the ultra node, the engages the cluster. A power of said process to associate with cluster protocol. The first engages the cluster the Mesh network, and calculates the father node comprising a controller, engages the multicast tree. And the overtime limiting is not used father node; and direct type selection node and father node; and node and network cluster to represent node at the time.

The process of the node of, first of the multicast tree, of the Mesh network and. The ineffective of node is a variety controller it is provided with a to coming from the node of message is a long time.

The network cluster represents between nodes and type nodes of the state information unceasingly, represents node comprising a network cluster for online, a variety network represents resources coefficient of the node is in. Resources coefficient of the weighs cluster the preset, a parts is: Bandwidth resource and a variety of use ratio bandwidth of assets cluster a node and system. Cluster adjacent nodes and maintain the cluster communicating the state information, wherein the design is considers to retard.

Each cluster with two constituents: Cluster controller and multiple cou group member. Cluster the controller is a program entity, wherein and position of the member and access contacted with. The current side thereof, comprising moving in cluster width less node.

The first controller midspan a full connected between the group member an application layer network Mesh network, a link in Mesh network represents unicasts between two member connected; the weight of ring is between two ends nodes of measuring unicast groove (for example, delay available bandwidth equal), in the design of consideration, and a without using to retard and an insulating manner.

The cluster maintenance controller with integral condition Mesh network information and cluster member, and is takes for taking the network cluster to represent node and root midspan, a layer short-path tree between the Mesh network member. For Mesh network energy-accumulating structure of very convenient or shortest tree, simultaneously improving multicast tree reliability, a tree multicast performance possibly to optimize into. Moreover, the architecture shortest multicast tree manner; and with good satisfaction broadcast using time delay with low - demand. The session data based on distributed along the multicast tree, and control information and each member through the unicast connected between the controller and transmission. The capacitor of a centralized control and distributed forwarding fusion system for stability.

Configured based layer short-path tree midspan in Mesh network and completely; therefore need to construct a high-efficient Mesh network. The Mesh network side of CBroadcast and Narada is different, comprising a maintaining is connected with the Mesh network to realize the multicast performance of each cluster. The CBroadcast nodal points of the variety's is, generally is 10-20; the cover to construct a full connected with the Mesh network is possibly, wherein the balanced the other group information members' not to bring the too an overhead messages in each member. Moreover, CBroadcast the ultra node saving current Mesh mark of the members (for of IP address). The ultra node's IP address is well-known, a engages the member for multicast set to obtain with a multicast group member newly information. The user a straight the ultra node information through the wire-locking groove (e.g. a webpage ring). CBroadcast of each cluster for centralized control policy to defend the multicast tree continuity and efficiency. The is columns from each considerations: Improving reliability system and reducing complexity (group member conversion socket and failure recovery) for. On the other side, the ultra node and operation in the control plane merely, wherein an affect the high speed data transmission between point. Cluster the controller is well-known the ultra node's IP address, which is takes for collecting and maintaining full Mesh network topology information, simultaneously and a multicast tree of each cluster node. Wherein the guide role in Mesh network with several steps: pointUser processing engages the Mesh network to: requestEngages the Mesh network n nodes ohm/„to arm the network MESH message to the controller newly transmission, the controller is related the network MESH response message to the IP address list of node/„loop comprises a Mesh network existed (,/,,/„, Wherein the. The obtaining the IP address tabulates, node of newly power converter. Said other nodes/,…,/, Divination, a unicast same, and measuring result sealed in flip the information transmitted to the controller. Wherein the controller is a message, a Mesh network topology information updating of the local maintaining, node power to the Mesh network/„and/„to the communicating ring information. The periodicity updating the Mesh network information: Each member node A periodic measurement in Mesh network nodes the/, same, wherein two ends ring between the Seat, network; The weight, and measuring result sealed in flip the information transmitted to a variety controller. The controller for receiving is as follows message, Mesh network topology information updating of the local maintaining. User processing of the Mesh network to: requestThe member having A node of the Mesh network system for sending, of the MESH network information to the transmission controller. The controller for a transmission from separating the MESH communication network, the Mesh network topology information for updating local maintaining, deletes the ring is eight corresponding nodes and voltage, and a Mesh network by the member node transmission of A updating the user information list. Meanwhile of the MESH network response to a transmission acknowledge message. The ineffective for processing user: A controller is not received having A node in transmission time setting's the rotating message, and thinks according TO possibly expires. Therefore controller transmit the multiple are to A continuous detecting message. A detecting the information is not replied; and controller concludes a ineffective. The data rate of A at the time controller with maintain is a ineffective, wherein it delete the member node the information, a protective in the receiving the obsolete member rotating information, wherein a thinks of preventing engages the member for multicast group newly. Passes through the lead and time, a variety controller updating the Mesh network topology information local for maintaining, deletes ring is 厶 the corresponding nodes and 4, and voltage to the Mesh network with the information for informing A expires the multicast tree node (A). father node and subnode in multicast tree). A see of the emitter in that: The four situations the Mesh network topology information and lower controller is updating automatic to maintain, and each to transmitting node for informing Mesh network: The controller for receiving the support part of node engages the Mesh network engages the MESH communication network; Controller receiving information of some of a node, afterA having a node to request of the net Side of the MESH communication network; Time part is not received member having a message, wherein the controller thinks of the member expires. And a secondary situations are the multicast tree with the high-precision of data forwarding with a direct power, therefore controller allocated with the related information informing is electrically connected with the member nodes in Mesh network in the two situations plugged. The second condition, is configured to the link quality exchange, wherein single-pole affect the data forwarding efficiency. In turn to reduce the ACK/NAK and a plurality to the overhead according to a node transmission updating information the network with, and multicast tree structure of overhead messages, the invention uses a time delay transmission the groove:

A message to the controller by receiving part for node, Mesh network topology information updating of the local, and further counting ring measuring sum of the opposite variable number of updating method, and updating method for measuring sum of the opposite variable quantity with does not a updating threshold value groove, in which is updating of the transmitting node in Mesh network the information, is a rotating message for receiving and sending nodes, a link measuring sum of the opposite variable quantity superstructure the updating threshold value, with the transmission of topological information trigger renewed. Cluster member the duty of operating comprises: The control register, a data forwarding, a communicating other; the shape of tree switch. Controller adjacent nodes in multicast tree is a father sub-relations, a group member for using a second to display the multicast performance tree and connecting. For example, wherein subnode detection's to the father node is failure, wherein two sides of the nodes. Edge of the shape of tree switching with two step: Controller calculates the multicast tree for optimizing; Group member discovered of the father node is defeated or the multicast tree. The two situations controller, a find a new father node of the node. Controller i and table one of each node, comprising the following: contentIP i, addressesRecent the time is a message of i a series of; ATime and receiving serial number is A flip message the local; timeThe member i and groove vector information tabulations of other ends node. When the controller receiving a message to a node for i, node information table one of traversal the local maintaining, and performing etching steps: processingThe part of each i to newly arm; the Mesh network information of the local power retaining member the node the information. Otherwise, and is in a message a series of greater than the is i maintenance series of voltage, updating information local. Otherwise, wherein the controller thinks is a message to the obsolete, without of any processing. The several (rm) controller with scheduled time i from a node is not received the new rotor message, the controller of the node i ineffective. The maintenance full Block network topology information (comprises at members' information), a cutting node in a new a linkage or the is existed is a trigger Mesh network the updating. Each node periodic measurement in Mesh network Side of the nodes' application layer unicasts retard, and a flip in a message transmitting the information sealed to the controller. Mesh network topology information of the controller is a given is transmitted by Mesh network member, Mesh network topology information for updating local maintaining. The Mesh network node each i periodic productions as follows message, wherein a a serial number is increased without (Of Sequence mark). Controller from the rotating information of the plate i criteria including the steps of: contentsIP i, addressesFlip a series of voltage; The member i and groove vector information tabulations of the nodes. Here, a obtaining from the vector algorithm calculating the local to the groove members' vector information. The first member in Mesh network periodic obtaining wherein of the handle for measuring the Mesh network connecting (is of a delayed measurement on the other side, and a sending which comprises of the neighbour node); A through hole and connected obtaining method vector information from the vector algorithm computer and neighbour node alternating the information. Path vector information is comprising the local to the members' measuring of groove; a concave table of - comprising are respectively pass through. Evening of the fifteenth antenna of the first lunar month are arranged in A wants to arm the Mesh network, according to the following steps completes to arm the: processA output end of the arm network MESH message to a controller, request indicator engages the Mesh network according controller; andThe controller is related the MESH network response current loop Mesh network and IP address tabulations of the nodes; and updating information updating to the wireless transmission group member. A to a given IP address list, said unicast the detentions of the communicating, and measuring result sealed in flip message sending a to the controller. A controller receiving the rotating message respectively A to the communicating deferred information, a Mesh network topology information for updating local maintaining; the Mesh network member tabulates A linkage meanwhile, A power to the communicating link state information, a Network information updating of the unicast form in the communicating to Mesh network. At the time A succeeded with the siamesed Mesh network. And A hopes arranged on the data, only need to arm to the network cluster to represent node and root multicast tree. The related the process of multicast tree for details sees, the power to the. Part and A node hopes of the Mesh network, comprising completes is of a current according to the following steps: First, A with a message to two tree to the transmission controller, a lower of the process of multicast tree to a details see the power to the. The table, A continuous retransmission data, reducing, wherein the TYPE of subnode consumption of data packet creates. With A completes is of a multicast tree units, wherein A receiving longer the communicating the data, wherein longer to the wireless data transmission. At the time of A a MESH network message notification to the controller, transmission and starting a timer. The controller for a transmission from separating the MESH communication network, the Mesh network topology information for updating local maintaining, deletes a communication the link of node and A connection, and is the information broadcasting of A with the other nodes of Mesh network. Meanwhile of the MESH network response to a transmission data message. With A receiving of MESH network response message, unit of the Mesh network successfully. And a timer, overtime is not received is of a MESH network response message, and redundancy of the MESH network information to the controller, power receiving till is of a MESH network response message. Node In Mesh network expires arranged in (and a plurality of node collapse or node of network failure), A are of the driving informing controller. The needed for failure detecting controller node. A controller is received from a node A transmission part of the rotating message, wherein the controller thinks according TO possibly expires. Therefore controller transmit the multiple are to A continuous detecting message. A detecting the information is not replied; and controller of a ineffective. The controller for updating Mesh network topology information of local and then, deletes a communication from the Mesh network node and a a related ring, and a updating the MESH network message transferring message according TO expires to each node of Mesh network. The controller is takes for calculating the is connected to the transverse of member at short-path tree, and computed results to send to each group of member. The overhead messages ring capable of the user, comprising: Time delay bandwidth, and parameter measuring. A video broadcasting a real-time application, the time delay possibly is at a parameter measuring. A part father node expires, wherein node's downstream data transmitting occur to output end, and not and a a new method for subnode promptly, expires are coated to the downstream subnodes. CBroadcast provides the failure detection mechanism and a backup mechanism, wherein a subnode efficient detection's to the father node failure, and switching backup father node rapidly. CBroadcast moving distance vector routing protocol and Network. In turn to prevent closed counting the distance vector routing protocol is the infinite problem, and is similar to the BGP protocol (rfcl771) strategy. Each member is installed on the member the prices of routing, moreover need to maintaining corresponding method. , Moreover, not only when point and system for updating device comprises a destination address the price of routing, moreover a corresponding method. The structoral data transmitting method for with the DVMRP protocol rfc (1812) opposite layer short-path mechanism for. The other testing, wherein N from THE S to FORM a layer short-path above the jump the socket; THE received from supply WHEREIN the packet of N-TYPE retransmits. Moreover, THE is installed retransmits packet is DELTA layer short-path above the jump point and socket.

Front node A power of said multicast tree, first engages the Mesh network (reference upper section), wherein the Mesh network node. A power to the network cluster to represent node on behalf of the node cluster network according to the following steps as by application layer multicast tree. A node engages the multicast tree request message to arm tree to the controller: transmissionMessage in a S IP address.

Wherein the maintenance on the controller with each member in Mesh current measuring of the multicast tree and via the S groove; therefore the controller is equal and network cluster on behalf of the node and root, comprising A node limited layer short-path tree, an consideration layer short-path, the controller when for transmitting multicast - tree need to consider for reducing and a and connected to the form of waist and multicast tree; In long and represents node from the cluster network to a node to time delay not more than threshold value (default is 600 milliseconds). A for controller calculates the father node and subnode in multicast tree, package and related tree response information transmitted to A, simultaneously change the shape of tree structure with updating tree message notification interdependent node.

By a father node receiving tree updating information, A linkage to for region node in listing. The whenever for receiving the network cluster from the data for transmitting node, claim tabulate the member (comprising A) is retransmit the data to for region. By a subnode for updating information tree, A power to father for node listing, simultaneously engages the father node message to a transmission. By a node for engages the father a node, indicated the arm for multicast tree is successful. (Q1 flowing transmitting power father node to wherein father node), wherein A node of all multicast tree system for sending, one of the following: processAn tree message to the transmission controller. A controller receiving departure tree information of some output member, one of the following: operationCalculates the new multicast tree according to the current Mesh network, informs arranged on the influence wherein a multicast - tree node; Informs a Day Fathers part, deletes of mark From a node region; listingThe root of node tree response message to a transmission.

Controller of all straight rod node with the Mesh network failure the information, and informs is electrically connected with the nodes; Moreover, the information back receiving the adjacent to send part informing member according expires, the member information suitable for the controller is maintain the ineffective, it does not delete the member, information to prevent and controlling the controller receiving of the obsolete member rotating information, wherein a thinks of preventing engages the member for multicast group newly. The time part; when the ineffective information informed each member in Mesh network, the ineffective member information can be deleted.

The root of multicast tree (using a random traversal the nodes in the multicast group of some of with a), a related multicast tree 2nd the starting to the Fathers antenna the part of each node.

Need to pay warning to two: point(l) of the multicast tree stage a node, A continuous retransmission data, reducing, wherein the TYPE of subnode consumption of data packet creates. With A completes is of a multicast tree units, wherein A receiving longer the communicating the data, wherein longer to the wireless data transmission; (2) Controller of all straight rod node with the Mesh network failure the information, and informs is electrically connected with the nodes; Moreover, the information back receiving the adjacent to send part informing member according expires, the member information suitable for the controller is maintain the ineffective, it does not delete the member, information to prevent and controlling the controller receiving of the obsolete member rotating information, wherein a thinks of preventing engages the member for multicast group newly. The time part; when the ineffective information informed each member in Mesh network, the ineffective member information can be deleted .

Cluster controller and invention with integral condition Mesh network information and cluster member, and is takes for taking the network cluster to represent node and root midspan, a short-path layer is an (SPT) between the Mesh network member. For Mesh network energy-accumulating structure of very convenient or shortest tree, simultaneously improving multicast tree reliability, a tree multicast performance possibly to optimize into. Moreover, the architecture shortest multicast tree manner; and with good satisfaction broadcast using time delay with low - demand. The session data based on distributed along the multicast tree, and control information and each member through the unicast connected between the controller and transmission. The capacitor of a centralized control and distributed forwarding fusion system for stability.