Methods and devices of error control with feedback resource allocation scheme

A method for controlling transmission errors in a network comprising at least one transmitter, at least one receiver, a Radio Resource Management (RRM) unit for allocating transmission resource dedicated to said transmitter and/or receiver, and a FeedBack (FBK) function comprising a transmitter FBK instance and a receiver FBK instance for managing transmission of feedback information which is transmitted by the receiver to the transmitter to indicate transmission errors, said method comprising the following steps:

• a) said transmitter FBK instance transmits Protocol Data Units (PDUs) to said receiver FBK instance;
• b) said FBK function monitors transmission errors on the receiver FBK instance side and/or on the transmitter FBK instance side to determine a transmission quality level out of a set of given transmission quality levels;
• c) said FBK function selects one feedback operational mode out of a predetermined list of feedback operational modes based on said determined transmission quality level, each one of said feedback operational modes defining a feedback resource allocation scheme for said transmitter FBK instance and said receiver FBK instance;
• d) said receiver FBK instance transmits to said transmitter FBK instance feedback information via a resource allocated based on said selected feedback operational mode;
• wherein between step c) and step d) the transmitter FBK instance transmits a Request for FeedBack (RFB) message to the receiver FBK instance;
• at step d) the receiver FBK instance transmits to the transmitter FBK instance feedback information via the next dedicated access resource which is allocated for the receiver FBK instance.

A method for controlling transmission errors in a network comprising at least one transmitter, at least one receiver, a Radio Resource Management (RRM) unit for allocating transmission resource dedicated to said transmitter and/or receiver, and a FeedBack (FBK) function comprising a transmitter FBK instance and a receiver FBK instance for managing transmission of feedback information which is transmitted by the receiver to the transmitter to indicate transmission errors, said method comprising the following steps:

• a) said transmitter FBK instance transmits Protocol Data Units (PDUs) to said receiver FBK instance;
• b) said FBK function monitors transmission errors on the receiver FBK instance side and/or on the transmitter FBK instance side to determine a transmission quality level out of a set of given transmission quality levels;
• c) said FBK function selects one feedback operational mode out of a predetermined list of feedback operational modes based on said determined transmission quality level, each one of said feedback operational modes defining a feedback resource allocation scheme for said transmitter FBK instance and said receiver FBK instance;
• d) said receiver FBK instance transmits to said transmitter FBK instance feedback information via a resource allocated based on said selected feedback operational mode;
• wherein feedback information is transmitted by the receiver FBK instance to the transmitter FBK instance in either a Short Feedback (SF) message or in a Detailed Feedback (DF) message, wherein said DF message comprises a list of identifiers of corrupted or missing PDUs, and said SF and DF messages comprise a given number N of corrupted or missing PDUs that are not specified in said SF or DF message, wherein a receiver FBK instance selects a SF message or a DF message based on the amount of resource available for feedback information transmission.

Device for controlling transmission errors comprising:

• transmission means;
• at least one receiver means;
• means for allocating transmission resource dedicated to said transmission means and/or said receiver means;
• and
• a FeedBack (FBK) function including means for managing transmission of feedback information which is transmitted by the receiver means to the transmitter means to indicate transmission errors;
• wherein:
• a) said transmitter means transmits Protocol Data Units (PDUs) to said receiver means;
• b) said FBK function monitors transmission errors to determine a transmission quality level out of a set of given transmission quality levels;
• c) said FBK function selects one feedback operational mode out of a predetermined list of feedback operational modes based on said determined transmission quality level, each one of said feedback operational modes defining a feedback resource allocation scheme for said transmitter means and receiver means;
• d) said receiver means transmits to said transmitter means feedback information via a resource allocated based on said selected feedback operational mode;
• wherein the list of feedback operational modes comprises a Reduced Feedback resource Allocation (RFA) feedback operational mode and a Normal Feedback resource Allocation (NFA) feedback operational mode, wherein the set of transmission quality levels comprises a low quality level and a high quality level, wherein said RFA feedback operational mode is selected in case of a high quality level transmission and said NFA feedback operational mode is selected in case of a low quality level transmission.