# US 9,882,733 B2 · Migrating eMBMS into a cloud computing system > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 9,882,733 B2 - Document ID: US9882733B2 - Status: Granted - Kind: B2 - Application number: 14/897,580 - Filed: 2013-06-14 - Published: 2016-04-28 - Granted: 2018-01-30 - Earliest claimed: 2013-06-14 - Assignees: Telefonaktiebolaget LM Ericsson (publ) - Applicants: Telefonaktiebolaget L M Ericsson (Publ) - Inventors: Xufan Hua; Jiangtao Zhang - Web page: https://patentgrep.com/patent/US9882733B2 ## CPC - H04L 12/189: {in combination with wireless systems (selective distribution or broadcast in wireless communication networks H04W4/06)} - H04L 49/35: Switches specially adapted for specific applications - H04L 61/2503: Translation of Internet protocol [IP] addresses - H04L 61/5069: for group communication, multicast communication or broadcast communication - H04L 65/1069: Session establishment or de-establishment - H04L 67/10: in which an application is distributed across nodes in the network (software deployment G06F8/60; multiprogramming arrangements G06F9/46) - H04L 69/16: Implementation or adaptation of Internet protocol [IP], of transmission control protocol [TCP] or of user datagram protocol [UDP] - H04W 76/11: Allocation or use of connection identifiers - H04W 76/40: for selective distribution or broadcast - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) ## Abstract A method is executed by a multimedia broadcast multicast services gateway (MBMS-GW) to offload data plane traffic, where the data plane traffic is enhanced MBMS (e MBMS) downlink traffic for a data plane interface Internet Protocol (IP) multicast transport between the MBMS-GW and an enhanced node B (e Node B). The method includes allocating an IP multicast address and a common tunnel endpoint identifier (C-TEID) for an MBMS session between node B (e Node B) and a broadcast multicast service center (BM-SC). The method also includes configuring the at least one network element to match an IP address and a user datagram protocol (UDP) port of incoming data plane traffic, to modify the IP address and UDP port to the IP multicast address and associated UDP port, and to push a general packed radio service (GPRS) tunneling protocol (GTP) user data (GTP-U) header including the C-TEID onto the data plane traffic. ## Claims ### Claim 1 A method executed by a network element implementing a multimedia broadcast multicast services gateway (MBMS-GW) to offload data plane traffic to at least one network element, where the data plane traffic is enhanced MBMS (eMBMS) downlink traffic for a data plane interface Internet Protocol (IP) multicast transport between the MBMS-GW and an enhanced node B (eNodeB), the method comprising: allocating an IP multicast address and a common tunnel endpoint identifier (C-TEID) for an MBMS session between the eNodeB and a broadcast multicast service center (BM-SC); and configuring a flow switch of the at least one network element via a flow control protocol, wherein the flow switch of the at least one network element is configured to: i) match an IP address and a user datagram protocol (UDP) port of incoming data plane traffic, ii) modify the IP address and UDP port to the IP multicast address and associated UDP port, and iii) push a general packed radio service (GPRS) tunneling protocol (GTP) user data (GTP-U) header including the C-TEID for the MBMS session onto the data plane traffic. ### Claim 2 (depends on 1) The method of claim 1, further comprising: creating an MBMS bearer context; and storing MBMS session attributes. ### Claim 3 (depends on 2) The method of claim 2, wherein the method is a passive configuration process and before the configuring further comprises: receiving data plane traffic from the at least one network element; and matching the data plane traffic with the MBMS bearer context or MBMS session attributes. ### Claim 4 (depends on 1) The method of claim 1, further comprising: receiving an MBMS session start request message from the BM-SC; and responding to the BM-SC with a MBMS session start response message. ### Claim 5 (depends on 4) The method of claim 4, wherein the method is an active configuration process that performs the configuring of the at least one network element after the responding to the BM-SC with the MBMS session start response message. ### Claim 6 (depends on 1) The method of claim 1, wherein the flow switch is an Openflow Switch and the flow control protocol is an Openflow protocol. ### Claim 7 (depends on 1) The method of claim 1, further comprising: sending the MBMS session start request message to a mobility management entity (MME); and receiving the MBMS session start response message from the MME. ### Claim 8 (depends on 1) The method of claim 1, wherein the configuring downloads a match field and action set, which constructs a flow entry, for a flow table in a flow switch. ### Claim 9 A network element implementing a multimedia broadcast multicast services gateway (MBMS-GW) to offload data plane traffic to at least one network element, where the data plane traffic is enhanced MBMS (eMBMS) downlink traffic for a data plane interface Internet Protocol (IP) multicast transport between the MBMS-GW and an enhanced node B (eNodeB), the network element comprising: a receiver configured to receive the data traffic; a transmitter configured to transmit the data traffic; and a computing processor configured to execute an MBMS module and an MBMS controller module, the MBMS module configured to allocate an IP multicast address and a control tunnel endpoint identifier (C-TEID) for an MBMS session between the eNodeB and a broadcast multicast service center (BM-SC); and the MBMS controller module configured to configure a flow switch of the at least one network element via a flow control protocol, wherein the flow switch of the at least one network element is configured to: i) match an IP address and a user datagram protocol (UDP) port of incoming data plane traffic, ii) modify the IP address to the IP multicast address and associated UDP port, and iii) push a general packed radio service (GPRS) tunneling protocol (GTP) user data (GTP-U) header including the C-TEID onto the data plane traffic. ### Claim 10 (depends on 9) The network element of claim 9, wherein the MBMS module is further configured to create an MBMS bearer context and store MBMS session attributes. ### Claim 11 (depends on 10) The network element of claim 10, wherein the MBMS controller module implements a passive configuration process and before the configuring, the MBMS module is further configured to receive data plane traffic from the at least one network element and to match the data plane traffic with the MBMS bearer context or MBMS session attributes. ### Claim 12 (depends on 9) The network element of claim 9, wherein the MBMS module is further configured to receive an MBMS session start request message from the BM-SC and to respond to the BM-SC with a MBMS session start response message. ### Claim 13 (depends on 12) The network element method of claim 12, wherein the MBMS controller module implements an active configuration process that performs the configuring of the at least one network element after the responding to the BM-SC with the MBMS session start response message. ### Claim 14 (depends on 9) The network element of claim 9, wherein the flow switch is an OpenFlow switch and the flow control protocol is an OpenFlow protocol. ### Claim 15 (depends on 9) The network element of claim 9, wherein the MBMS module is further configured to send the MBMS session start request message to a mobility management entity (MME) and to receive the MBMS session start response message from the MME. ### Claim 16 (depends on 9) The network element of claim 9, wherein the MBMS controller module downloads a match field and an action set for a flow table in a flow switch. ### Claim 17 (depends on 9) The network element of claim 9, wherein the network element is implemented in a cloud computing system. ### Claim 18 A method executed by a network element implementing a multimedia broadcast multicast services gateway (MBMS-GW) to offload data plane traffic to at least one network element, where the data plane traffic is enhanced MBMS (eMBMS) downlink traffic for a data plane interface Internet Protocol (IP) multicast transport between the MBMS-GW and an enhanced node B (eNodeB), the method comprising: receiving an MBMS session stop request message from a broadcast multicast service center (BM-SC); sending an MBMS session stop response message to the BM-SC; and configuring a flow switch of the at least one network element via a flow control protocol, wherein the flow switch of the at least one network element is configured to delete a flow table entry matching an IP address and a user datagram protocol (UDP) port of incoming data plane traffic for the MBMS session using the flow control protocol.