Abstract: An exoskeleton device includes a plurality of braces that are each attachable to a part of a user. A plurality of joints connects adjacent braces. Each joint is controllable to bend or unbend so as to cause the exoskeleton device to change between an erect configuration and a sitting configuration. At least one support column is extendible from a brace. A length of the support column is adjustable. A controller is configured to adjust the length of the support column in coordination with the bending or unbending of a joint to provide support for the exoskeleton device when in the sitting configuration.

Abstract: An exoskeleton device includes a plurality of braces that are each attachable to a part of a user. A plurality of joints connects adjacent braces. Each joint is controllable to bend or unbend so as to cause the exoskeleton device to change between an erect configuration and a sitting configuration. At least one support column is extendible from a brace. A length of the support column is adjustable. A controller is configured to adjust the length of the support column in coordination with the bending or unbending of a joint to provide support for the exoskeleton device when in the sitting configuration.

Abstract: A WiMAX based system having a base station which communicates to a plurality of consumer premises equipment (CPE) is disclosed. The base station obtains and stores information corresponding to the MAC addresses of each CPE. Messages from one CPE can be sent to the base station and then sent to another CPE using the MAC address stored in the base station. Each CPE may originate an uplink multicast message for transmission to more than one CPE. When the base station receives the uplink multicast message, it broadcasts the multicast message to all of the CPEs identified in the multicast message including the originating CPE. When the originating CPE recognizes the multicast message as a message it originated, the originating CPE drops the multicast message. The CPEs may be grouped into virtual local area networks (VLANs) using group identifiers which permit multicast messages to be transmitted to specific groups of CPEs.

Abstract: A WiMAX based system having a base station which communicates to a plurality of consumer premises equipment (CPE) is disclosed. The base station obtains and stores information corresponding to the MAC addresses of each CPE. Messages from one CPE can be sent to the base station and then sent to another CPE using the MAC address stored in the base station. Each CPE may originate an uplink multicast message for transmission to more than one CPE. When the base station receives the uplink multicast message, it broadcasts the multicast message to all of the CPEs identified in the multicast message including the originating CPE. When the originating CPE recognizes the multicast message as a message it originated, the originating CPE drops the multicast message. The CPEs may be grouped into virtual local area networks (VLANs) using group identifiers which permit multicast messages to be transmitted to specific groups of CPEs.