Huawei Technologies Co., Limited

Hon Hai Precision Industry Co., Ltd.

Hong-fu Jin Precision Industry (shenzhen) Co., Ltd.

Ming Wei

Shou-Kuo Hsu

Chia-Nan Pai

Bin Huang

Yong Luo

Xindong Teng

Guangyu Sun

Hua-Li Zhou

Xuejiang Zhang

Feng Gang

Hongsen Mao

Shudong Wang

Weiguo Li

The present invention provide a method for forwarding a multicast program includes: receiving a multicast join request message requesting an on-demand program from a user; obtaining forwarding decision information according to the multicast join request message; determining a decision result corresponding to the forwarding decision information according to the forwarding decision information and forwarding relation data, where the decision result is forwarding according to PON replication or forwarding according to user replication, the forwarding relation data includes data elements indicating correspondence between various types of forwarding decision information and various types of forwarding modes, and the various types of forwarding modes include the forwarding according to PON replication and the forwarding according to user replication; and forwarding the on-demand program to the user according to the decision result.

Method, apparatus and system for forwarding multicast program

A via design method includes doing a simulation according to input data to obtain the impedance of the via of the reference printed circuit board (PCB). An optimal via model is determined according to a group of input data. Simulating is performed according to the thickness of a PCB to-be-designed and the optimal via model data, to obtain the impedance of a via of a PCB to be designed. The number of the anti-pads of the via of the PCB to be designed is recorded when the difference between the impedance of the via of the PCB to be designed and the impedance of the via model of the reference PCB does not fall within a preset range. An interval between each two adjacent anti-pads of the via of the PCB to designed is determined according to the recorded number and the thickness of the PCB to be designed.

System and method for designing via of printed circuit board

A printed circuit board includes an insulation layer and a signal layer attached to the insulation layer. The signal layer includes a pair of differential transmission lines. Width W of each of the differential transmission lines is changed according to change of space S between the differential transmission lines, based on the following formula: In above formula, C1=7.475, C2=5.98, C3=0.48, C4=&#x2212;0.96, H is a thickness of the insulation layer, Wis an original width of each of the differential transmission lines, and Sis an original space between the differential transmission lines, and T is a thickness of each of the differential transmission lines.

Printed circuit board

A reliability processing method and system in networking of Metro Ethernet Network providing multi-service are provided. The method includes: establishing a Virtual Router Redundancy Protocol (VRRP) group with at least two service control gateways, establishing network connections between an access device (UPE) and the service control gateways in the Virtual Router Redundancy Protocol group by a Virtual Private LAN Service (VPLS); establishing Layerservice and Layerservice connections between an active service control gateway and the Access device after active and standby service control gateways in the Virtual Router Redundancy Protocol group are determined according to a processing result of a Virtual Router Redundancy Protocol message, and performing Layerservice and Layerservice processing. With the present invention, when the MAN service is in fault, all the Layerand Layerservices may be switched to the standby service control gateway quickly, and the switching may be on the order of milliseconds. Therefore, the reliability of the Layerand Layerservices of the MAN may be sufficiently guaranteed, and the overhead of the system may be reduced significantly.

Reliability processing methods and systems in the networking of metro ethernet network providing multi-service

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Shenzhen, China

Ming Wei