National Taipei University of Technology

Bing Chih Yao

Shaw Hwa Hwang

Ning Yun Ku

Tzu Hung Lin

Ming Che Yeh

Shun Chieh Chang

Chi Jung Huang

Kuan Lin Chen

Li Te Shen

Cheng Yu Yeh

Chao Ping Chu

Yao Hsing Chung

The present invention provides a method for householder of mansion to manage entrance by smart phone, so that the householder can manage entrance at outside. When a visitor pushes a doorbell of a mansion door machine, the householder at outside uses a smart phone to conduct audio and video communication with the visitor. If the householder agrees to let the visitor go in, the householder instructs the smart phone to generate a password for the visitor to memorize and let the visitor enter the mansion. The password is also sent to a home door machine of the householder. When the visitor an ives the home door machine of the householder, input the password. If the password inputted by the visitor is the same as the password generated by the smart phone, then the home door will open to let the visitor go in.

Method for householder of mansion to manage entrance by smart phone

The present invention provides a registration method for managing NAT shutdown. In Internet communication field, a user must perform registrations intermittently to a server through NAT, and increase the time interval of registration step by step. But NAT itself will shutdown if no packet is passed through for a long period. The registration method of the present invention is to adjust the time interval of registration step by step so that the time interval of registration is slightly less than the shutdown time of NAT, and then fix the time interval of registration to assure that all of the Invite packet can pass through without blocking up by the shutdown of NAT.

Registration method for managing NAT shutdown

The present invention provides a method of image conversion operation for panorama dynamic IP camera. Three wide-angle cameras are used for obtaining a panorama dynamic image, and then to be compressed and transferred through Internet to a PC/smartphone/tablet for being decompressed and image conversion operation, so that a user can use the PC/smart phone/tablet to slide a touch screen thereof for viewing the desired dynamic image.

Method of image conversion operation for panorama dynamic IP camera

In SIP network environment, a general NAT traversal method will become invalid when an NAT with ICMP (Internet Control Message Protocol) is met. The present invention provides four sessions for SIP, i.e. Login Session, Port Prediction Session, Synchronization Session and Media Session, and the SIP network environment includes a first Internet telephone, a second Internet telephone, a first symmetric NAT, a second symmetric NAT and an SIP proxy server. The first symmetric NAT and the second symmetric NAT are ICMP-sensitive. In the Synchronization Session, the first Internet telephone and the second Internet telephone are designed to transmit packets synchronously to avoid port locking.

Traversal method for ICMP-sensitive NAT

The present invention provides an improved SIP communication protocol. An NAT (Network Address Translator) traversal method is added before the SIP communication protocol, i.e. a client to client (C2C) module function is added to improve the function of SIP communication protocol, so as to solve the problem that the RTP (Real-time Transport Protocol) packets cannot traverse NAT firewall to achieve C2C communication after SIP (Session Initiation Protocol) is ended in VoIP. The major content of the present invention is to conduct a plurality of detection before SIP communication protocol, so as to predict the allocation rules of the port number by the C2C module, and open the RTP channel for C2C.

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Taipei, Taiwan

Bing Chih Yao