Method and arrangement in a communication system

摘要

A terminal is configured to receive data packets from a base station and provide feedback to the base station. The feedback concerns the reception status of the received data packets and may comprise an ACK/NAK. A method in the terminal comprises receiving and decoding data packets from the base station in a subframe. It is further established whether any data packet within the received subframe is not correctly received and detected whether any subframe, expected to be received, has been missed. Further, acknowledgement information ACK/NAK is generated, and a scrambling code is selected with which the ACK/NAK is scrambled. The scrambled ACK/NAK is then sent to the base station, concerning the reception status of the data packets within the received subframes.

主权项

1. A method in a terminal for providing acknowledgement or non-acknowledgement (ACK/NAK) information to a base station concerning a reception status of one or more data packets received in one or more subframes from the base station, the method comprising:
generating ACK/NAK information to be sent to the base station; counting the number of subframes received from the base station; selecting a scrambling code based on a total number of received subframes; scrambling the generated ACK/NAK information with the selected scrambling code; and sending the scrambled ACK/NAK information to the base station.