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.