Patent ID: 9729278
Date: 2017-08-08
CPC Classifications: H04L,H04W

Claim:
1. A method for use in a cellular communications system comprising: receiving, at a receiving transceiver, data units from a sending transceiver, wherein the data units are each identified by an identifier and wherein the data units are divided into segments; sending status information from the receiving transceiver to the sending transceiver, about properly received, partially received, or non-received data units; and wherein sending said status information comprises sending a message comprising: data acknowledging properly received data units or frames in the form of a certain sequence number; an extension indicator (E) of a first type; data regarding a non-received or partially received data unit or frame, in the form of a certain sequence number; an extension indicator (F) of a second type, indicating whether the data unit or units were non-received or partially received; and, in the case of one or more partially received data units, which parts of those data units that were not received, and further wherein said extension indicator of the first type indicates the absence or presence of a set comprising another extension indicator of the first type and another extension indicator of the second-type and data regarding a non-received or partially received data unit or frame in the form of the identifier of said data unit or frame.