Nokia Corporation

Pemamek Oy

Mikko Savolainen

Harri Juhani Pekonen

Jyrki Alamaunu

Timo Tynkkynen

Manufacturing method, welding arrangement and door frame structure for a door frame () of a windmill tower (), wherein a hole () is made in the tower shell () for the door and a door frame is placed in the hole and welded on the shell. In the method, the shape of the door frame for the shell and the shape of the surface of the shell at the opening () to be made are measured with a measuring sensor (). Based on the measurements, a cutting torch () is controlled so that an opening corresponding to the shape of the door frame is cut in the shell and bevels () are cut in the edge of the opening on both sides. The door frame is welded on the shell with a weld (), such as a double bevel, double J or square butt weld, from the inside and the outside of the shell.

Method for manufacturing a door frame, welding arrangement and structure of a door frame

Data for a second Multi-Protocol Encapsulation-Forward Error Correcting (MPE-FEC) data frame is received while application data from a first MPE-FEC frame is undergoing error correction. The incoming data is buffered in a supplemental buffer having a size smaller than that needed for an entire MPE-FEC frame. As the supplemental buffer is filled, additional data from the second frame is stored in a buffer previously used to store error correction data for the first MPE-FEC frame. When corrected application data from the first MPE-FEC frame is transferred from an application data buffer used to hold application data undergoing correction, the second MPE-FEC frame data is transferred from the supplemental and error correction data buffers to the application data buffer. Additional data for the second frame is then placed directly into the application and error correction data buffers.

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Niinijoki, Finland

Mikko Savolainen