Abstract: Data is transmitted from a first wireless station comprising first and second transmitters to a second wireless station comprising first and second receivers. In the absence of radio link failure detection, first data is transmitted via a first radio link from the first transmitter to the first receiver using a first subset of first radio resource blocks and transmitting second data via a second radio link from the second transmitter to the second receiver using second subset of the first radio resource blocks. The first and second radio links are monitored for a failure. If first radio link failure is detected, the second radio link is operated using a combination of the first and second subsets of the first radio resource blocks. If second radio link failure is detected, the first radio link is operated using a combination of the first and second subsets of the first radio resource blocks.

Abstract: Data is transmitted from a first wireless station comprising first and second transmitters to a second wireless station comprising first and second receivers. In the absence of radio link failure detection, first data is transmitted via a first radio link from the first transmitter to the first receiver using a first subset of first radio resource blocks and transmitting second data via a second radio link from the second transmitter to the second receiver using second subset of the first radio resource blocks. The first and second radio links are monitored for a failure. If first radio link failure is detected, the second radio link is operated using a combination of the first and second subsets of the first radio resource blocks. If second radio link failure is detected, the first radio link is operated using a combination of the first and second subsets of the first radio resource blocks.

Abstract: Encryption is provided for a wireless network comprising a first wireless station and at least a second wireless station. First messages are exchanged between the first wireless station and the second wireless station over a first synchronous wireless link to establish a shared secret and a first session key, the first messages not being encrypted. The MAC layer of the first synchronous wireless link is then encrypted using encryption on the basis of the first session key, then further messages are exchanged between the first wireless station and the second wireless station over the first synchronous wireless link to establish a second session key, the further messages being encrypted by the encryption of the MAC layer of the first synchronous wireless link. The MAC layer of the first synchronous wireless link is then encrypted using encryption on the basis of the second session key.

Abstract: Encryption is provided for a wireless network comprising a first wireless station and at least a second wireless station. First messages are exchanged between the first wireless station and the second wireless station over a first synchronous wireless link to establish a shared secret and a first session key, the first messages not being encrypted. The MAC layer of the first synchronous wireless link is then encrypted using encryption on the basis of the first session key, then further messages are exchanged between the first wireless station and the second wireless station over the first synchronous wireless link to establish a second session key, the further messages being encrypted by the encryption of the MAC layer of the first synchronous wireless link. The MAC layer of the first synchronous wireless link is then encrypted using encryption on the basis of the second session key.

Abstract: A system for communicating between a surface facility and a subsea production control system includes a communications device proximate the water surface. The water surface communications device has at least one communication interface. A communications device is functionally associated with a wellhead or subsea structure proximate the water bottom. The water bottom communications device has at least one communication interface. A communication channel extends between the surface communication device and the water bottom communication device. A multiplexer is functionally coupled to the communication interface on each of the surface and water bottom communication devices. At least two remote devices are functionally coupled to the water bottom multiplexer. The remote devices comprise at least one of a sensor and a control. At least two corresponding devices are coupled to the surface multiplexer.

Abstract: A system for use in a subsea environment includes at least one fiber optic cable for connection to surface equipment, and a subsea optical junction assembly connected to the at least one fiber optic cable. The system further includes subsea components, and plural fiber optic cables connected to corresponding subsea components. The subsea optical junction assembly couples the at least one fiber optic cable for connection with the surface equipment to the plural fiber optic cables connected to the subsea components.

Abstract: An apparatus includes a housing, a first connection interface and an optical amplifier. The housing receives a fiber optic line and an electrical line. The first connection interface is located at least partially inside the housing and is exposed outside of the housing to couple the fiber optic line and the electrical line to a second connection interface. The optical amplifier is located inside the housing and is coupled to the fiber optic line. The optical amplifier receives power from the electrical line.

Abstract: An apparatus includes a housing, a first connection interface and an optical amplifier. The housing receives a fiber optic line and an electrical line. The first connection interface is located at least partially inside the housing and is exposed outside of the housing to couple the fiber optic line and the electrical line to a second connection interface. The optical amplifier is located inside the housing and is coupled to the fiber optic line. The optical amplifier receives power from the electrical line.

Abstract: A disposable electrode assembly for establishing electrical contact with an underlying skin surface includes a relatively thin transparent base member having a central hub portion and an adhesive-coated undersurface, a conductive gel-impregnated sponge contact contained in a downwardly facing recess located in the hub, and a relatively thick and inflexible cover member coextensive with the base member. In storage the cover member is attached to the undersurface of the base member by the adhesive and the sponge is confined within the recess. Prior to use the base member is peeled away from the cover member to expose the adhesive surface, which when applied to a skin surface holds the sponge contact in compression-contact therewith. The base is transparent to enable the user to detect skin irritation and incomplete adhesion of the base member, and may be provided with apertures to facilitate breathing of the underlying skin.

Abstract: A disposable electrode assembly for establishing electrical contact with an underlying skin surface includes a relatively thin base member having a central hub portion and an adhesive-coated undersurface, a conductive gel-impregnated sponge contact contained in a downwardly facing recess located in the hub, and a relatively thick and inflexible cover member coextensive with the base member. In storage the cover member is attached to the undersurface of the base member by the adhesive and the sponge is confined within the recess. Prior to use the base member is peeled away from the cover member to expose the adhesive surface, which when applied to a skin surface holds the sponge contact in compression-contact therewith. The cover member includes a roughened surface about its circumference for cleaning the skin surface prior to applying the base member to the skin.