초록 ▼

Systems and methods related to maintaining a signaling link between network terminals in a communications network. Periodic receiver ready frames are transmitted from a first terminal to a second terminal when there are no data frames to be transmitted. A temporal period is determined during which a

Systems and methods related to maintaining a signaling link between network terminals in a communications network. Periodic receiver ready frames are transmitted from a first terminal to a second terminal when there are no data frames to be transmitted. A temporal period is determined during which a predetermined condition will affect communications with the second terminal; the predetermined condition can be, for example, a period during which the sun will be within a predetermined subtended angle of an antenna associated with the second terminal. The second terminal transmits a pause frame to the first terminal prior to the temporal period; the pause frame includes the identification of the temporal period. The first terminal then pauses the transmission of data frames and the periodic receiver ready frames during the temporal period, and resumes the transmission of data frames and periodic receiver ready frames subsequent to the expiration of the temporal period, whereby it is unnecessary to re-establish a signaling link between the first and second terminals upon the expiration of the temporal period.

대표청구항 ▼

Systems and methods related to maintaining a signaling link between network terminals in a communications network. Periodic receiver ready frames are transmitted from a first terminal to a second terminal when there are no data frames to be transmitted. A temporal period is determined during which a

Systems and methods related to maintaining a signaling link between network terminals in a communications network. Periodic receiver ready frames are transmitted from a first terminal to a second terminal when there are no data frames to be transmitted. A temporal period is determined during which a predetermined condition will affect communications with the second terminal; the predetermined condition can be, for example, a period during which the sun will be within a predetermined subtended angle of an antenna associated with the second terminal. The second terminal transmits a pause frame to the first terminal prior to the temporal period; the pause frame includes the identification of the temporal period. The first terminal then pauses the transmission of data frames and the periodic receiver ready frames during the temporal period, and resumes the transmission of data frames and periodic receiver ready frames subsequent to the expiration of the temporal period, whereby it is unnecessary to re-establish a signaling link between the first and second terminals upon the expiration of the temporal period. ving a single dedicated servo layer and multiple data stacks which each contain an embedded servo format, a servo laser beam positioned to maintain a first focus point on the dedicated servo reference layer, a read-write laser beam positioned to maintain a second focus point on one of the data stacks, a first, dedicated servo system which provides focus and tracking error correction according to error signals generated from the dedicated servo layer, and a second, embedded servo system which provides focus and tracking error correction according to error signals generated from the data stacks. The dedicated servo layer, in different embodiments of the invention, may be positioned either below or above the data stacks in the optical medium, or interposed between data stacks. The data stacks may comprise discrete physical data layers or "virtual" data layers defined by a format hologram. The servo and read-write lasers may differ in wavelength and/or polarization.