Retransmission in wireless communication systems

Multiplex communications – Communication over free space – Combining or distributing information via time channels

Reexamination Certificate

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Details

C455S522000, C714S748000, C714S749000, C714S750000

Reexamination Certificate

active

08050248

ABSTRACT:
The invention relates to retransmissions in wireless communication systems. It is proposed to reduce the retransmission delays by utilizing feedback associated with a lower protocol layer than the conventional feedback messages of the ARQ functionality. After sending a packet from a transmitter towards a receiver, the transmitter monitors the link for a low-level control signal from the receiver. The low-level control information can e.g. comprise power control commands or be related to link quality indicators. Based on this signal, it is decided whether a retransmission is to take place, e.g. at the transmitter or at an external control unit.

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