Institute for Information Industry

Industrial Technology Research Institute

National Yang Ming Chiao Tung University

Rong-Hong Jan

Yu-Hsiang Lin

Chien Sheng Chen

Hsia-Hsin Li

Ching-Lun Lin

Chia-Tai Tsai

Shih-Chang Huang

Chih-Hsiang Ho

Chih-Che Lin

Pei-Chuan Tsai

Zi-Tsan Chou

An-Kai Jeng

Huei-Ru Tseng

Po-Wen Chi

Kuo-Chen Wang

Wei-Chih Lin

Hung-Nan Ye

Tzu-Lin Chang

Chen-Hao Kao

Ho-Wei Tsai

Je-Wei Chang

A method of dynamic adjusting a generation frequency of messages in vehicular networks is provided, including: receiving updating requests and emergent degree of the vehicle event, and then determining whether the generation frequency of messages meets the dynamic change of the vehicle, if not satisfied, selecting a different adjustment method according to the event emergent degree. When the event is emergent, its generation frequency can be raised immediately by an interruptive adjustment and to suppress the generation frequency of messages of the others. Conversely, adjusting its generation frequency by a progressive adjustment and reducing the generation frequency of messages of the other lower-priority vehicles. According to the present disclosure, it prevents lower priority messages from occupying the channel overly, and emergency messages with higher priority can be satisfied immediately when it needed.

System of dynamically adjusting generation frequency of messages in vehicular networks and method thereof

Embodiments of the present invention are directed to methods and systems for generating and revoking, as well as validating, certificates used to protect communications within networks while maintaining privacy protection. In the context of a method, certificate generation and revocation with privacy preservation comprises determining a secret value to be used by a certificate authority and an entity; constructing a key tree based on the secret value, wherein the leaves of the key tree represent derived keys for the certificates for the entity; and generating certificates for the entity based in part on the key tree leaves. The method further comprises determining that one or more of the certificates should be revoked; determining a minimum key node set that covers the certificates to be revoked; adding the minimum key node set to a certificate revocation list; and providing the certificate revocation list to one or more entities. Corresponding apparatuses and computer program products are also provided.

Method for certificate generation and revocation with privacy preservation

The communication system comprises a base station (BS), a femtocell and a core network. The femtocell deployed within the signal coverage of the BS establishes a first wired connection with an internet service provider (ISP) network and a first wireless connection with a user equipment (UE). The core network establishes a second wired connection with the ISP network and a third wired connection with the BS. The core network is configured to determine that a voice data transmission service is about to be provided to the UE, and transmit a first radio access bearer (RAB) setup request message to the BS to enable the BS to establish a second wireless connection with the femtocell according to the first RAB setup request message so that the UE performs a voice data transmission with the core network via the first wireless connection, the second wireless connection and the third wired connection.

Communication system including a femtocell and communication method thereof

An anchor gateway, a communication method and a tangible machine-readable medium are provided. The anchor gateway is for use in a WiMAX network comprising an authentication gateway and a serving base station (BS). After a mobile station (MS) enters the WiMAX network, the anchor gateway will request the authentication gateway and the serving BS according to an identification of the MS to respectively provide authentication key context and medium access control context. Thereby, the network latency, which is made by the MS in handover, will be reduced effectively.

Anchor gateway, communication method and non-transitory machine-readable medium thereof

A method of elliptic curve cryptography (ECC) using the enhanced window-based mutual opposite form (EW-MOF) on scalar multiplication. First, an elliptic curve and a base point on the elliptic curve are selected. Next, essential pre-computed points for a selected window size are calculated. Then, a private key is randomly generated and the mutual opposite form (MOF) is used to convert the private key's binary representation into a signed binary representation. Finally, a public key is calculated by using the enhanced window (EW) method. By greatly reducing the number of essential pre-computed points, the EW-MOF reduces average key generation time (including pre-computation time).

Method of elliptic curve cryptography using EW-MOF on scalar multiplication

An automatic photographing method is provided. The method includes the steps of: receiving a dialing message from a telecommunications network; recognizing a phone number from the dialing message, and controlling a camera module to take at least one photo according to the dialing message; and performing image processing to the photo to generate photo data corresponding to the phone number.

Automatic photographing system and method thereof

A base station, a femtocell, and a handover monitoring method thereof are provided. A wireless network system comprises a server, a mobile device, the base station, and the femtocell. The base station transmits a monitoring signal to the femtocell after it obtains a piece of information corresponding to the mobile device from the server. The femtocell keeps detecting whether a signal is transmitted by the mobile device after it receives the monitoring signal. The femtocell transmits a response signal corresponding to the monitoring signal to the base station after it detects the signal transmitted by the mobile device. The base station transmits a handover signal to the mobile device after it receives the response signal so that the mobile device handovers from the base station to the femtocell. A handover monitoring from the base station to the femtocell for the mobile device is provided by the hand monitoring method.

Base station, femtocell and handover monitoring method thereof

A data scheduling module, a data scheduling method and computer program product thereof for a wireless communication apparatus are provided. The data scheduling method comprises the following steps: determining that the frame length of a second data transmission interval is not smaller than a frame length of a first data transmission interval; summing at least one first data and at least one second data according to the frame length of the second data transmission interval; calculating an average value according to the frame length of the second data transmission interval and the summed result; calculating an aggregate data transmission interval according to a data transmission capacity, the average value, and an integer adjusting value; and transmitting the at least one first data and the at least one second data via a plurality of frames in accordance with the aggregate data transmission interval.

Data scheduling module, method, and computer program product thereof for a wireless communication apparatus

A fleet maintenance method for generating a suggested speed for each vehicle in a fleet to maintain the vehicle in the fleet is provided. In the fleet maintenance method, vehicles are clustered into a plurality of sub-fleets, and in each sub-fleet, one vehicle is selected as a leader vehicle and the other vehicles are considered as member vehicles. Besides, a position coordinate and a speed of each vehicle in each sub-fleet are obtained, and the position coordinate is converted into a corresponding linear coordinate. In addition, a sub-fleet gravity center of each sub-fleet and a fleet gravity center of the entire fleet are calculated according to the linear coordinates. Moreover, a suggested speed of each leader vehicle is generated according to a gravity center distance of the leader vehicle, and a suggested speed of each member vehicle is generated.

Growing community of inventors

Hsinchu, Taiwan

Rong-Hong Jan