174 results about "Internet Group Management Protocol" patented technology

The present invention provides a method for sending a message to a network device with a specific MAC address, in an IP network implementing a internet group management protocol IGMP, comprising: sending, by a network terminal, to the network device, a multicast group management status message including a destination address set as the specific MAC address A system comprises a multitude of end-user devices coupled via a broadband connection with a service provider network, a publish/subscribe broker adapted to communicate with the multitude of end-user devices and at least a first back-end entity coupled with the service provider network. The first back-end entity includes a first client software application for connecting to the publish/subscribe broker and publishes control data via a control data channel for a device management of the end-user devices. The end-user devices include a second client software application for connecting to the publish/subscribe broker for subscribing to the control data channel and for receiving the control data, and for publishing device data and action data as instructed by the control data. The backend entity authorization is validated in particular by using a control data signature.

There is provided a method for supporting a multicast service in an Ethernet passive optical network system. Since an Optical Network Unit (ONU) system monitors an IGMP (Internet Group Management Protocol) message and informs the monitored result of an Optical Line Terminal (OLT) system so that the OLT system creates L2 multicast forwarding table using a multicast address and ONU ID information in a PON port, the ONU system transmits the multicast packet only to a corresponding subscriber on the basis of the L2 multicast forwarding table when receiving a multicast packet. Therefore, it is possible to transfer a multicast packet only to a specific ONU system belonging to a corresponding multicast address group among a plurality of ONU systems.

An IP multicast communication system includes a layer-2 switch for accommodating a plurality of recipients dynamically joining or not joining a multicast group, a layer-3 switch adapted to a subnet for receiving IP multicast data sent from a sender via an IP network and distributing the received IP multicast data to authorized recipients joining the multicast group via the layer-2 switch under control, and a controller for collectively managing recipient management information for authentication of the recipients obtained according to an Internet Group Management Protocol IGMP. The layer-3 switch authenticates the recipients according to the recipient management information adapted to its subnetwork among the recipient management information collectively managed by the controller. The layer-2 switch stops transmission of the IP multicast data or thins the IP multicast data sent to recipients that are determined to have made unauthorized accesses by the layer-3 switch.

A network apparatus for forwarding multicast packets to a plurality of multicast receivers includes a switch and a main module. The switch includes a plurality of ports for connecting the plurality of multicast receivers. The main module includes an Internet group management protocol (IGMP) snooping module and a forwarding module. The IGMP snooping module creates several virtual local area networks (VLANs) based on the possible combinations of the plurality of ports, snoops IGMP report messages, determines port identifiers (IDs) of source ports of the IGMP report messages, and establishes a forwarding table according to the VLANs, the IGMP report messages, and the port IDs. The forwarding module adds VLAN tags to multicast packets according to the forwarding table. The switch forwards the multicast packets with the added VLAN tags to corresponding ports according to the VLAN tags. A method for forwarding multicast packets is also disclosed.

This invention discloses a multimessage CC method based on a two-layer exchange device receives IGMP message from the ACC port to judge if there is VLAN head in the message; if not, adding VLANID of the ACC port to the said message to form VLAN head, then to generate an image relationship list of ACC port VLANID and MAC address to IGMP message physical port and generating an image relationship list of up-line port VLANID and MAC address to IG MP message physical port, and finally to the multimessage according to the above image relationship list.

The present invention relates to a method of transmitting data in a handover between base stations. When a mobile terminal performs a handover between base stations in a wireless communication system, a gateway transmits data traffic to be transmitted to a mobile terminal by using an IGMP (Internet Group Management Protocol) to a serving base station being serviced to the mobile terminal and a target base station to which a handover of the mobile terminal is made in a bi-casting method. Accordingly, when the mobile terminal performs the handover between the base stations, the gateway transmits the data traffic in the bi-casting method. As a result, it is possible to efficiently use a resource of a user plane connection interval between the gateway and the base station, thereby minimizing the loss of data traffic transmitted in a downlink, that is, data.

A method for implementing multicast via a passive optical network (PON) may include receiving Internet group multicast protocol (IGMP) messages from a customer device. Multicast information associated with the IGMP messages is identified, wherein the multicast information includes at least multicast group information and customer identification information. The multicast information is stored in a multicast state table. Downstream layer 2 traffic is received and multicast addressing information is extracted from the layer 2 traffic. It is then determined whether the multicast addressing information matches the multicast group information stored in the multicast state table. The layer 2 traffic is forwarded on at least one PON interface corresponding to the customer identification information that is associated with the stored multicast group information when the multicast addressing information matches the multicast group information stored in the multicast state table.

The invention provides a multicast message transmitting method, which comprises the following steps that: while receiving a first group of messages sent by a customer edge (CE), a provider edge (PE) used as a multicast source triggers message digest (MD) messages, and the MD messages are broadcast to each opposite end PE in virtual switch interface (VSI) examples; after each opposite end PE analyzes the received MD messages, the mapping of private network multicast addresses and public network multicast addresses is built, in addition, the PE with the same private network multicast addresses triggers and broadcasts internet group management protocol (IGMP) accession request messages of the public network multicast addresses, each equipment builds a public network multicast address transmitting list after receiving the IGMP request messages, and the PE used as the multicast source seals the multicast messages at a public network multicast tunnel end, and the multicast messages carry out the multicast transmission according to the public network multicast address transmitting list. The invention also discloses routing equipment, when the method and the equipment provided by the invention are adopted, the transmission of the multicast messages can be realized in a multicast mode, the network resource waste caused by invalid broadcasting is avoided, and in addition, the bandwidth resource waste caused by the single broadcasting mode is avoided.

The invention discloses a method for realizing cross-VPN multicast, which comprises that: PE on a multicast source and PE on a customer are all provided with a virtual switch instance (VSI) of a VPN where the multicast source is positioned, and pseudo wire (PW) connection is established in the VSI; a multicast router sends an internet group management protocol (IGMP) general query message in the VPN where the multicast source is positioned, and uplink router port information of the VPN where the multicast source is positioned is respectively formed in the PE on the multicast source and the PE on the customer; the PE on the customer and the PE on the multicast source maintain a local multicast member relation table respectively according to sensed multicast information carried in an IGMP protocol message initiated by a user in a VPN where a non-multicast source is positioned; and when receiving multicast data streams, the PE on the multicast source and the PE on the customer retrieve the locally stored multicast member relation table respectively according to the VPN ID where the multicast source is positioned and a multicast MAC address, and then forward the multicast data streams through downlink outgoing interfaces of retrieved entries.

The invention discloses a port configuration method and exchange equipment, wherein the method is applied in an exchange equipment which enables IGMP Snooping, and comprises receiving neighbor information of a link layer discovery protocol LLDP transmitted by a neighbor device through a port, judging whether the neighbor device enables the IGMP Snooping or not according to the LLDP neighbor information received by the port, and doing dynamic router port configuration to the port when the neighbor device enables the IGMP Snooping. The exchange equipment can lead multicast flow to be rapidly contracted through the IGMP Snooping information of an expanded LLDP information carrying device according to an expanded LLED information dynamic configuration router port when network topology is changed, manual configuration of users is avoided under the circumstance that the port is allocated with a plurality of VLANs, and the exchange equipment is convenient to maintain.

A method for implementing multicast includes: receiving or generating an internet group management protocol IGMP packet; judging whether the packet is a first join packet or a last leave packet of a multicast group, and adding an identifier indicating whether the IGMP packet is a first join packet or a last leave packet of a multicast group to the IGMP packet, where the identifier is used for a subsequent entity not to perform multicast processing on the IGMP packet when judging that the IGMP packet is not the first join packet or the last leave packet of the multicast group according to the identifier; and forwarding the IGMP packet to the subsequent entity. Therefore, the packet processing pressure on the network apparatus is relieved, and meanwhile, the IGMP packet requirements in the practical network are met.

The disclosed method is realized based on video multicast by using Internet group management protocol (IGMP) Proxy/Snooping. The method includes following operations: (1) for each optical network unit (ONU), the system defines their ID i.e. ONU ID, and defines each multicast ID for multicast group of video service stream in different content; (2) using structure from point to multipoint of Ethernet passive optical network (EPON), the method combines IGMP with down going broadcast mechanism of EPON network to realize single copy multicast of same video service stream in EPON network. Overcoming disadvantages of low use ratio of multicast bandwidth, the method reproduces only one piece of video service stream for each group on OLT for users in same group share. The invention saves network bandwidth, lowers network load. Features are: easy of implementation, forward compactable and easy to realize intercommunication with multicast protocol of data network IGMP.

The invention discloses a realizing method for an MVR (multicasting virtual LAN registration) in a GPON (Gigabit-capable Passive Optical Network) system. An IGMP (internet group management protocol) and an MVR protocol are operated at an OLT (optical line terminal) side to manage multicasting information and user multicasting authority; simultaneously, the OLT collocates legal multicasting user information on an ONU (optical network unit) through an OMCI (optical network terminal management control interface). The OLT sends a multicasting data flow to the ONU through broadcasting GEMPort (GPON sealing mode port mark). The ONU carries out filtering, copying and VLAN switch on the downgoing multicasting data according to the multicasting information collocated by the OLT and sends thereof to each multicasting user. The method of the invention improves the integration and security of management, simplifies the design of ONU and simultaneously improves the operating factor of bandwidth.

The invention provides a method and a device for processing the internet group management protocol (IGMP) messages, and enables a port in a blocked state to treat IGMP messages in advance, wherein, the method comprises the following steps: when receiving or sending an IGMP message through the port in a blocked state, a switch determinates whether a list item including the IGMP message information exists in an IGMP message list arranged corresponding to the port or not; if no, the list item including the IGMP message information is established in the IGMP message list arranged corresponding to the port, the IGMP message is forwarded; and when the IGMP message is an IGMP adding message, the IGMP message is utilized to establish and forward the list item; if yes, the IGMP message is discarded. The invention can shorten the time of interrupting multicast stream after switching a link circuit, and avoid the broadcast caused by the ring circuit of the IGMP messages.

The method includes following steps: setting up at least one access control list including user address sequence and multicast group address sequence on an access server; carrying out association between information of user id and access control list; waiting for receiving message added from Internet group management protocol (IGMP); after receiving message added from IGMP, the method carries out matching operation between the message and different access control lists; finally, based on matching result, determining whether the message is discarded or not. The invention prevents issue that added attribute of multicast is possibly unable to be recognized availably caused by compatibility between Radius server and different access servers from occurring. The invention controls authority of multicast smartly and finely by through multiple conditions including users, multicast channels and time slicing of reception.

The invention discloses a multicast management method and two-layer equipment, which are applied to the two-layer equipment using Internet group management protocol (IGMP) snooping. The two-layer equipment is characterized in that an inquiry port list is set in an IGMP snooping list item on the two-layer equipment. The multicast management method comprises the following steps that: when the two-layer equipment receives IGMP inquiry messages, a port receiving the IGMP inquiry messages is set into an inquiry port; after the two-layer equipment receives the IGMP inquiry messages form the inquiry port, the inquiry port is added into an outlet port list in a corresponding multicast transmitting list item according to multicast addresses required to be added; and the two-layer equipment transmits the received IGMP messages according to the inquiry port and transmits received multicast flows according the multicast transmitting list item. When the multicast management method and the two-layer equipment provided by the invention are adopted, bandwidth resources in the multicast transmitting process are saved.

The embodiment of the present invention relates to a service starting method for network television. The method comprises that before an IP network is accessed, a join request carrying multicast program channel information on the basis of an Internet group management protocol is sent through physical link connection; the stream media for the join request message to request to join in the multicast group is obtained. The embodiment of the present invention also relates to a device and a system for the service starting of the network television and a network television terminal. The embodiment of the present invention speeds up the speed of the service starting of the network television, and reduces the waiting time of a user during the service starting process of the network television.

A method of determining whether devices support a Multicast Channel Allocation Protocol (MCAP), and a multicast communication method using the same. The method includes an MCAP device broadcasting an MCAP advertise message to a plurality of devices on a network, the MCAP device, which broadcasts the MCAP advertise message, broadcasting an Internet Group Management Protocol (IGMP) query message to the plurality of devices on the network, and the MCAP device, which broadcasts the MCAP advertise message, determining whether each of the plurality of devices on the network supports the MCAP using channel numbers through which a plurality of IGMP report messages was transmitted from the plurality of devices on the network. By doing so, calculation loads caused by unnecessarily using broadcast channels, even when all devices included in a multicast group on the IEEE1394 network support the MCAP, can be prevented.

The invention discloses an IGMP message transmitting method comprising that an IGMP agent device receives IGMP adding messages from a host; the IGMP agent device obtains the multicast source address corresponding to the IGMP adding messages, searches a uni-cast routing table of itself according to the multicast source address to obtain an outgoing interface of the next hop; if the outgoing interface is an uplink interface of IGMP, the IGMP agent device sends out the IGMP adding messages through the outgoing interface; if the outgoing interface is not an uplink interface of IGMP, the IGMP agent device selects an interface from the IGMP uplink interfaces of itself and sends out the IGMP adding messages through the selected interface. The invention also discloses an IGMP agent device. The invention avoids rounding of multicast flows and realizes load-sharing between IGMP uplink interfaces.

An upstream distribution point of a video distribution system adjusts programming to replace content that is not selected. In particular, an upstream distribution point of a cable broadcast system receives tuning data representing the currently tuned, or selected, program from one or more set-top boxes via Internet Group Management Protocol (IGMP) signaling. The up-stream distribution point collects the tuning data from the one, or more, set-top boxes and replaces at least one of those programs not selected with alternative programming or content.

A method and switch for Internet Group Management Protocol (IGMP) snooping are disclosed. The method includes: configuring, by a switch, a router interface listed in an IGMP snooping table; configuring, by the switch, a multicast forwarding table entry and a corresponding outgoing interface list; and configuring, by the switch, interfaces which are adjacent to switches in the outgoing interface list. The advantage of the invention is the rapid recovery of the multicast data packets forwarding in the loop network when the network topology of the Layer Two loop network changes.

The invention discloses a method for realizing intranet penetration by using an Internet group management protocol (IGMP), and aims to overcome the shortcoming that a system using a Symmetric network address translator (NAT) cannot actively access another terminal by using one terminal. The method mainly comprises the following steps that: a first terminal transmits a request to a server, and is kept to be connected with the server; a second terminal transmits an IGMP message, establishes a multicast domain, is classified into a group, locally establishes a user datagram protocol (UDP) socket and performs snooping on a port; the second terminal transmits a multicast domain value and a port value to the server, and initiates an access request; the server forwards the access request to the first terminal; and the first terminal transmits data to a second router, and the second router forwards the data to the second terminal. The invention also discloses an intranet penetration system, which comprises at least two terminals, a router and the server. The method is applied to various systems of which each accesses another terminal by using one terminal, particularly to the system using the Symmetric NAT.

The invention discloses a method and device for preventing an IGMP (Internet Group Management Protocol) from being cheated and attacked. The method comprises the following steps of: S1: monitoring an IP (Internet Protocol) address requesting process of a DHCP (Dynamic Host Configuration Protocol) host machine by a switchboard and establishing a DHCP binding table which contains a user IP, a MAC (Media Access Control) address, a virtual local area network identification number and receiving port information; S2: monitoring an IGMP message by the switchboard and judging the type of the message; if the message is a common group inquiry message, executing the step S3; if the message is a membership report message, executing the step S4; S3: judging the legality of the message through judging whether the receiving port information is matched with a pre-configured trusted port or not; and S4: judging the legality of the message through judging whether the message information and the information of the DHCP binding table are matched with the threshold value of the number of multicast groups which are allowed to be added by each IP. Through adoption of the method and the device provided by the invention, the problems that the inquiry cheating on the IGMP common group, the cheating on an IGMP source address and the attack against an IGMP member report message are effectively solved; and the method is simple and easy to realize and is good for safe operation of a network.

The invention provides a method for transmitting multicast data on a resilient packet ring (RPR) and a RPR node. The establishment of a forward table containing the corresponding relation between a multicast group and a receiving node is realized on the RPR node which carries out upper ring processing to the message query of an internet group management protocol, thus leading the RPR node to being capable of determining a shortest forward path corresponding to the multicast group according to the topology information of the forward table and the RPR, determining that the last receiving node in the shortest forward path is a stripping node and leading the transmitted multicast data of the multicast group to stop transmission on the RPR at the stripping node. The invention can save more bandwidth of the RPR, which is occupied in the transmission process of the multicast data.

The invention discloses a method for implementing proxy interception multicast. The method is applied to a process for implementing multicast by a passive optical network (PON) access system. The PON access system comprises an optical line terminal (OLT) main control disk and an OLT line clamp, wherein a module for running an internet group management protocol (IGMP)Proxy protocol is arranged on the OLT main control disk; a module for running an IGMPSnooping protocol is arranged on the OLT line clamp; a timer is involved; when the main control disk sends a query message of a multicast group, the timer is switched on and is used for setting time T; the state of the multicast group is set to be not received; if the message of the multicast group is received within the time T, the state of the multicast group is set to be received; and on the premise that the state of the multicast group is received, if the message of the multicast group is received again, a transferring table is only constructed on the OLT line clamp, and the message is not submitted to the OLT main control disk. By utilizing the method, the problem of massive report messages submitted to the main control disk is solved.

The invention discloses a unified electoral method of a PIM-SM (Protocol Independent Multicast-Sparse Mode) designated router and an IGMP (Internet Group Management Protocol) querier. According to the unified electoral method, roles of a main router in a VRRP (Virtual Router Redundancy Protocol) in the same network are introduced as reference basis in the process of electing the designated router in a PIM-SM and the querier in an IGMP, namely, the states of the designated router in the PIM-SM and the querier in the IGMP are the same as the state of the main router in the VRRP respectively, and when the state of the main router in the VRRP changes, the designated router in the PIM-SM and the querier in the IGMP are subjected to state switching synchronously. Therefore, the problem that multicast traffic cannot be correctly forwarded in the multicast because of inconformity of the designated router in the PIM-SM and the querier in the IGMP in the same network is solved, and meanwhile, the electron and switching speeds of the designated router in the PIM-SM and the querier in the IGMP are also improved.