公开(公告)号：US09503272B2

公开(公告)日：2016-11-22

申请号：US14209744

申请日：2014-03-13

Applicant: CISCO TECHNOLOGY, INC.

Inventor： Fang Yang ,  Kathy Xia Ke ,  Isidoros Kouvelas ,  Christian Cassar

IPC: H04L12/56 ,  H04L12/18

CPC classification number: H04L12/185

Abstract: In one embodiment, a method includes discovering at a first edge device in a first network that a multicast source has moved from the first network to a second network, the first edge device in communication through a core network with a plurality of edge devices belonging to a multicast group comprising the multicast source, transmitting from the first edge device to a second edge device in the second network, a join request for the multicast group comprising the multicast source at the second network, receiving multicast traffic for the multicast group at the first edge device on a transient multicast tree extending from the second edge device to the plurality of edge devices, and forwarding the multicast traffic to the plurality of edge devices. An apparatus and logic are also disclosed herein.

Abstract translation: 在一个实施例中，一种方法包括在第一网络中的第一边缘设备发现组播源已经从第一网络移动到第二网络，第一边缘设备通过核心网络与多个边缘设备属于 包括所述组播源的组播组，从所述第一边缘设备向所述第二网络中的第二边缘设备发送包括所述组播源在内的所述多播组的加入请求，所述多播组在所述第二网络处包括所述多播组， 在从第二边缘设备延伸到多个边缘设备的瞬时多播树上，将多播流量转发到多个边缘设备。 本文还公开了一种装置和逻辑。

公开(公告)号：US20150263864A1

公开(公告)日：2015-09-17

申请号：US14209744

申请日：2014-03-13

Applicant: CISCO TECHNOLOGY, INC.

Inventor： Fang Yang ,  Kathy Xia Ke ,  Isidoros Kouvelas ,  Christian Cassar

IPC: H04L12/18

CPC classification number: H04L12/185

Abstract: In one embodiment, a method includes discovering at a first edge device in a first network that a multicast source has moved from the first network to a second network, the first edge device in communication through a core network with a plurality of edge devices belonging to a multicast group comprising the multicast source, transmitting from the first edge device to a second edge device in the second network, a join request for the multicast group comprising the multicast source at the second network, receiving multicast traffic for the multicast group at the first edge device on a transient multicast tree extending from the second edge device to the plurality of edge devices, and forwarding the multicast traffic to the plurality of edge devices. An apparatus and logic are also disclosed herein.

Abstract translation: 在一个实施例中，一种方法包括在第一网络中的第一边缘设备发现组播源已经从第一网络移动到第二网络，第一边缘设备通过核心网络与多个边缘设备属于 包括所述组播源的组播组，从所述第一边缘设备向所述第二网络中的第二边缘设备发送包括所述组播源在内的所述多播组的加入请求，所述多播组在所述第二网络处包括所述多播组， 在从第二边缘设备延伸到多个边缘设备的瞬时多播树上，将多播流量转发到多个边缘设备。 本文还公开了一种装置和逻辑。

公开(公告)号：US20250048177A1

公开(公告)日：2025-02-06

申请号：US18365451

申请日：2023-08-04

Applicant: Cisco Technology, Inc.

Inventor： Qiang Yang ,  Kathy Xia Ke ,  Yuping Wang ,  Jing Wang ,  Bin Yu

IPC: H04W28/04 ,  H04W28/02

Abstract: In one embodiment, a method for achieving zero packet loss in wireless roaming is implemented by a processor of a wireless client device in a system. The wireless client device establishes a first data plane in association with a first radio connected to a first access point and a second data plane in association with a second radio. The first data plane is different from and operates concurrently with the second data plane. The wireless client device determines a second access point by scanning a plurality of operating channels using the second radio. The wireless client device synchronizes the second data plane with a network controller to connect the second radio with the second data plane to the second access point. The wireless client device switches traffic of the first data plane connected to the first access point to the second data plane connected to the second access point.

公开(公告)号：US11063781B2

公开(公告)日：2021-07-13

申请号：US16660447

申请日：2019-10-22

Applicant: Cisco Technology, Inc.

Inventor： Jun Liu ,  Jing Wang ,  Yong Wang ,  Kathy Xia Ke

IPC: H04L12/18 ,  H04L12/46 ,  H04L12/66 ,  H04W40/22 ,  H04W84/12

Abstract: Systems and methods herein can convert downstream group addressed packets to unicast packets and send them to Workgroup Bridges (WGBs) by Downlink (DL) Multiple-User (MU) Orthogonal Frequency Division Multiple Access (OFDMA) (DL-MU-OFDMA). A Wireless Controller (WLC)/Access Point (AP) can extend current Inter-Access Point Protocol (IAPP) messages for broadcast and deploy Internet Group Management Protocol (IGMP) processing for multicast messages. The APs can maintain WGB entries for each group address. When there is a downstream broadcast packet received at the AP, the AP can search the entries in the domain and can build a 4-address unicast packet for each WGB, then transmit those converted packets in parallel by DL-OFDMA. After receiving those converted packets over the air, the WGB simply rebuilds 802.3 packets and forwards the 802.3 packets to the corresponding VLAN domain.

公开(公告)号：US20210119815A1

公开(公告)日：2021-04-22

申请号：US16660447

申请日：2019-10-22

Applicant: Cisco Technology, Inc.

Inventor： Jun Liu ,  Jing Wang ,  Yong Wang ,  Kathy Xia Ke

IPC: H04L12/18 ,  H04L12/46 ,  H04W40/22 ,  H04L12/66

Abstract: Systems and methods herein can convert downstream group addressed packets to unicast packets and send them to Workgroup Bridges (WGBs) by Downlink (DL) Multiple-User (MU) Orthogonal Frequency Division Multiple Access (OFDMA) (DL-MU-OFDMA). A Wireless Controller (WLC)/Access Point (AP) can extend current Inter-Access Point Protocol (IAPP) messages for broadcast and deploy Internet Group Management Protocol (IGMP) processing for multicast messages. The APs can maintain WGB entries for each group address. When there is a downstream broadcast packet received at the AP, the AP can search the entries in the domain and can build a 4-address unicast packet for each WGB, then transmit those converted packets in parallel by DL-OFDMA. After receiving those converted packets over the air, the WGB simply rebuilds 802.3 packets and forwards the 802.3 packets to the corresponding VLAN domain.