Hitachi, Ltd.

Hitachi America, Ltd.

Kenichi Otsuki

Satoshi Yoshizawa

Daisuke Matsubara

A core network that includes a number of relay nodes and edge nodes, intercoupled by network links, interconnects a plurality data transfer entities through gateway elements. Each gateway element is allocated a portion of the data communicating (QoS) resource of certain of the links, and maintains information of that allocation. When a gateway receives a request for a data transfer from a data transfer entity with a particular communicating resource requirement, it will check its associated information to determine of the allocated resource is sufficient. If not, the gateway may ask for a reconfiguration of resources that re-allocate communicating resource from one gateway element to the asking gateway element.

Method and apparatus for providing a quality of service path through networks

A network system comprises a network of data sources interconnecting plural clients by way plural network devices. A data server achieves flexibility in its use of network resources by altering the attributes of one or more network devices along the communication channels between the data server and the plural clients. This is accomplished during the normal course of data transmissions to the plural clients, thus providing real time control over the network device attribute. The invention is particularly useful in data servers, such as a video server system, in which data transmissions are characterized by a long sequence of data packets.

Growing community of inventors

Santa Clara, CA, United States of America

Kenichi Otsuki