Wen Lin

US Patent:

6784831, Aug 31, 2004

Filed:

May 5, 2003

Appl. No.:

10/429492

Inventors:

James June-Ming Wang - San Marino CA
Wen Yen Lin - Arcadia CA

Assignee:

TIA Mobile, Inc. - Pasadena CA

International Classification:

G01S 502

US Classification:

34235712, 34235706, 342372, 701213

Abstract:

An improved GPS signal receiver (and corresponding method of operation) includes a plurality of antenna elements each receiving a plurality of GPS signals (e. g. , GPS LI signals or GPS L2 signals). A plurality of mixers (which correspond to the array of antenna elements) and a combining node convert the GPS signals received at the antenna elements in a frequency-division-multiplexed (FDM) manner over FDM frequency bands logically assigned to the antenna elements to produce a composite signal representing such GPS signals. An analog-to-digital converter converts an analog signal derived from the composite signal (which may be an intermediate frequency signal or a baseband signal) into a digital word stream. Demultiplexing logic extracts GPS signal components in the digital word stream. The GPS signal components correspond to the FDM frequency bands logically assigned to the antenna elements.

US Patent:

7123876, Oct 17, 2006

Filed:

Nov 1, 2001

Appl. No.:

10/016233

Inventors:

James June-Ming Wang - San Marino CA, US
ChauChin Yang - Los Angeles CA, US
Wen Yen Lin - Arcadia CA, US

Assignee:

Motia - Pasadena CA

International Classification:

H04B 7/14

US Classification:

455 25, 455 133, 455 132, 455 19, 455 634, 4551151, 4551152, 455 121, 342354, 342372, 342373, 342374, 342359, 342757

Abstract:

A low profile, vehicle mounted, in-motion tracking, satellite antenna includes a pair of antenna assemblies mounted in parallel on a rotatable platform. Each antenna assembly includes two subreflectors with a plastic matching element. The outputs of the two antenna assemblies are coupled with a single phase shifter. The combined outputs are retransmitted to a receiver inside the vehicle. The satellite antenna also includes a receiver for receiving channel selection data and/or for providing two-way communication with equipment inside the vehicle. The antennae, transmitter and receiver are self-powered by a storage device which is charged by a wind driven generator. A retractable radome lowers to a lower profile when the antenna is not in use.

US Patent:

20220385570, Dec 1, 2022

Filed:

Jun 30, 2021

Appl. No.:

17/305117

Inventors:

- Sunnyvale CA, US
Wen Lin - Andover MA, US
Suresh Palguna Krishnan - Fremont CA, US
SelvaKumar Sivaraj - Sunnyvale CA, US
Kumuthini Ratnasingham - Saratoga CA, US

International Classification:

H04L 12/721
H04L 12/713
H04L 12/741
H04L 12/46

Abstract:

A plurality of switches may be arranged according to a spine and leaf topology in which each spine switch is connected to all leaf switches. A leaf switch includes a memory configured to store a plurality of policies, each of the plurality of policies being associated with a respective source identifier value and a respective destination address; a network interface communicatively coupled to one of the spine switches; and a processor implemented in circuitry and configured to: receive a packet from the spine switch via the network interface, the packet being encapsulated with a Virtual Extensible Local Area Network (VXLAN) header; extract a source identifier value from the VXLAN header; determine a destination address for the packet; determine a policy of the plurality of policies to apply to the packet according to the source identifier value and the destination address; and apply the policy to the packet.

US Patent:

20220272034, Aug 25, 2022

Filed:

May 13, 2022

Appl. No.:

17/744335

Inventors:

- Sunnyvale CA, US
Wen Lin - Andover MA, US
Kevin Wang - Acton MA, US

International Classification:

H04L 45/50
H04L 12/46
H04L 45/18
H04L 45/00
H04L 69/22

Abstract:

In some cases, once Fast Reroute (FRR) has taken place (e.g., for MPLS protection), a further FRR is undesirable, and even detrimental. A mechanism to prevent a further FRR, once such a further FRR is determined to be potentially harmful, is described.

US Patent:

20200287780, Sep 10, 2020

Filed:

May 22, 2020

Appl. No.:

16/881507

Inventors:

- Sunnyvale CA, US
Wen Lin - Andover MA, US
SelvaKumar Sivaraj - Sunnyvale CA, US
Rukesh Dorai - Sunnyvale CA, US
Sunesh Rustagi - San Jose CA, US

International Classification:

H04L 12/24
H04L 12/723
H04L 12/741
H04L 12/721
H04L 12/703
H04L 12/46
H04L 12/707
H04L 12/26

Abstract:

Techniques are described for avoiding traffic black-holing in a multi-homed Ethernet virtual private networks (EVPNs) in which a customer device (CE) is multi-homed to a plurality of multi-homing provider edge devices (PEs) via respective links of an Ethernet segment. An overlay network is created over the Ethernet segment, and the multi-homing PEs of the EVPN are configured with a common anycast IP address for respective virtual network interfaces. Upon election as active designated forwarder (DF) for the EVPN, the DF PE of the multi-homing PEs advertises toward the customer network an IGP metric for the anycast IP address that is lower than the IGP metric(s) advertised by any of the non-DF standby PE routers segment to direct the CE to forward network packets from the customer network to the DF PE over the respective link of the Ethernet segment.

US Patent:

20200213155, Jul 2, 2020

Filed:

Mar 7, 2020

Appl. No.:

16/812295

Inventors:

- Sunnyvale CA, US
Wen Lin - Andover MA, US

International Classification:

H04L 12/46
H04L 12/24
H04L 12/751
H04L 12/723
H04L 12/721
H04L 29/06
H04N 21/81
H04L 29/12

Abstract:

For use in an Ethernet Virtual Private Network (EVPN) in which a site including at least one MAC-addressable device is multihomed, via a customer edge device (CE), to at least two provider edge devices (PE and PE), the potential problem of one of the at least two provider edge devices (PE) dropping or flooding packets designed for a MAC-addressable device of the multihomed site is solved by controlling advertisements of an auto-discovery per EVPN instance (A-D/EVI) route (or an auto-discovery per Ethernet segment identifier (A-D/ESI) route) to a remote provider edge device (PE), belonging to the EVPN but not directly connected with the CE. Such advertisements may be controlled by: (a) determining, by PE, whether or not a MAC-learning condition is met; and (b) responsive to a determination that the MAC-learning condition is met, advertising, by PE, an A-D/EVI route (or an A-D/ESI route) to the remote provider edge device (PE), and otherwise, responsive to a determination that the MAC-learning condition is not met, suppressing, by PE, an A-D/EVI route advertisement (or an A-D/ESI route advertisement).

US Patent:

20190305988, Oct 3, 2019

Filed:

Mar 30, 2018

Appl. No.:

15/942177

Inventors:

- Sunnyvale CA, US
Wen Lin - Andover MA, US

International Classification:

H04L 12/46
H04L 12/723
H04L 12/24
H04L 12/721
H04L 12/751
H04L 29/06

Abstract:

For use in an Ethernet Virtual Private Network (EVPN) in which a site including at least one MAC-addressable device is multihomed, via a customer edge device (CE), to at least two provider edge devices (PE and PE), the potential problem of one of the at least two provider edge devices (PE) dropping or flooding packets designed for a MAC-addressable device of the multihomed site is solved by controlling advertisements of an auto-discovery per EVPN instance (A-D/EVI) route (or an auto-discovery per Ethernet segment identifier (A-D/ESI) route) to a remote provider edge device (PE), belonging to the EVPN but not directly connected with the CE. Such advertisements may be controlled by: (a) determining, by PE whether or not a MAC-learning condition is met; and (b) responsive to a determination that the MAC-learning condition is met, advertising, by PE an A-D/EVI route (or an A-D/ESI route) to the remote provider edge device (PE), and otherwise, responsive to a determination that the MAC-learning condition is not met, suppressing, by PE an A-D/EVI route advertisement (or an A-D/ESI route advertisement).

US Patent:

20190288943, Sep 19, 2019

Filed:

Apr 19, 2018

Appl. No.:

15/957345

Inventors:

- Sunnyvale CA, US
Wen LIN - Andover MA, US
Praful LALCHANDANI - Fremont CA, US
Aldrin ISAAC - San Jose CA, US
Deepti J. CHANDRA - Sunnyvale CA, US
Vishal GARG - Fremont CA, US

International Classification:

H04L 12/741
H04L 29/12
H04L 12/24
H04L 12/46
H04L 29/08

Abstract:

A device may receive, from a provider edge device, a packet to be provided to one or more other provider edge devices. Some of the one or more other provider edge devices may be multi-homed with a same customer edge device as the provider edge device. The device may configure a source IP address of the packet based on a capability of an assisted replicator device after receiving the packet. The capability may relate to whether the assisted replicator device is capable of retaining the source IP address of the packet as received from the provider edge device. The device may provide the packet to at least some provider edge devices, of the one or more other provider edge devices, after configuring the source IP address of the packet.