Avoidance of feedback collision in mobile communications
First Claim
1. A mobile communication system comprising:
- a mobile terminal; and
a base station to communicate with the mobile terminal feedback information of a retransmission protocol for a transmitted data packet, whereinthe feedback information for a respective data packet is transmitted on a radio resource having a location that is determined according to a counter value indicative of a number of transmissions that have taken place for the respective data packet to avoid collisions of the feedback information with parallel transmissions, wherein;
the radio resource for transmitting feedback information for a data packet is determined according to a radio resource used for transmitting scheduling information for a first transmission of the data packet and the current counter value of the data packet, and wherein;
the scheduling information is a scheduling grant for allocating an uplink resource to the mobile terminal for transmitting the data packet on an uplink, orthe scheduling information indicates a downlink resource on which the data packet is transmitted to the mobile terminal,the retransmission protocol provides synchronous retransmissions of the data packet, where retransmissions of the data packet are sent without prior transmission of scheduling information for a retransmission and in the retransmission protocol, retransmissions are sent after a preconfigured time span upon having received (i) feedback information for a previous transmission of the data packet, (ii) a previous transmission of the data packet, or (iii) the scheduling information for the data packet,there is a number of Nfr feedback resources reserved for feedback transmission in the communication system each being associated to a feedback resource index, andeach feedback resource for providing feedback for a respective data packet is chosen based on the equation;
feedback resource index=(current transmission number)modulo Nfr.
2 Assignments
0 Petitions
Accused Products
Abstract
The invention relates to feedback transmission for data packets in a mobile communication system. In particular the invention provides a communication system wherein feedback information of a retransmission protocol for transmitted data packets is transmitted. Further, the invention relates to a method for determining radio resources for the transmission of feedback information of a retransmission protocol for transmitted data packets as well as to a base station and a mobile station performing the method. In order to prevent potential collisions of feedback information while omitting a destination identifier for identifying the receiver of the feedback, the feedback resources for sending the feedback are determined at least based on a current transmission counter for a packet.
-
Citations
9 Claims
-
1. A mobile communication system comprising:
-
a mobile terminal; and a base station to communicate with the mobile terminal feedback information of a retransmission protocol for a transmitted data packet, wherein the feedback information for a respective data packet is transmitted on a radio resource having a location that is determined according to a counter value indicative of a number of transmissions that have taken place for the respective data packet to avoid collisions of the feedback information with parallel transmissions, wherein; the radio resource for transmitting feedback information for a data packet is determined according to a radio resource used for transmitting scheduling information for a first transmission of the data packet and the current counter value of the data packet, and wherein; the scheduling information is a scheduling grant for allocating an uplink resource to the mobile terminal for transmitting the data packet on an uplink, or the scheduling information indicates a downlink resource on which the data packet is transmitted to the mobile terminal, the retransmission protocol provides synchronous retransmissions of the data packet, where retransmissions of the data packet are sent without prior transmission of scheduling information for a retransmission and in the retransmission protocol, retransmissions are sent after a preconfigured time span upon having received (i) feedback information for a previous transmission of the data packet, (ii) a previous transmission of the data packet, or (iii) the scheduling information for the data packet, there is a number of Nfr feedback resources reserved for feedback transmission in the communication system each being associated to a feedback resource index, and each feedback resource for providing feedback for a respective data packet is chosen based on the equation;
feedback resource index=(current transmission number)modulo Nfr. - View Dependent Claims (2, 3, 4, 5, 7, 8)
-
-
6. A mobile communication system, comprising:
-
a mobile terminal; and a base station to communicate with the mobile terminal feedback information of a retransmission protocol for a transmitted data packet, wherein; the feedback information for a respective data packet is transmitted on a radio resource having a location that is determined according to a counter value indicative of a number of transmissions that have taken place for the respective data packet to avoid collisions of the feedback information with parallel transmissions, wherein; the radio resource for transmitting feedback information for a data packet is determined according to a radio resource used for transmitting scheduling information for a first transmission of the data packet and the current counter value of the data packet, and wherein; the scheduling information is a scheduling grant for allocating an uplink resource to the mobile terminal for transmitting the data packet on an uplink, or the scheduling information indicates a downlink resource on which the data packet is transmitted to the mobile terminal, the radio resource for transmitting feedback information for the data packet is determined according to the radio resource used for transmitting scheduling information for a first transmission of the data packet, and the number of transmissions that have taken place and a redundancy version utilized for transmitting the data packet, there is a number of Nfr feedback resources reserved for feedback transmission in the communication system each being associated to a feedback resource index, and each feedback resource for providing feedback for a respective data packet is chosen based on the equation;
feedback resource index=(current transmission number)modulo Nfr.
-
-
9. A mobile communication system, comprising:
-
a mobile terminal; and a base station to communicate with the mobile terminal feedback information of a retransmission protocol for a transmitted data packet, wherein; the feedback information for a respective data packet is transmitted on a radio resource having a location that is determined according to a counter value indicative of a number of transmissions that have taken place for the respective data packet to avoid collisions of the feedback information with parallel transmissions, wherein; the radio resource for transmitting feedback information for a data packet is determined according to a radio resource used for transmitting scheduling information for a first transmission of the data packet and the current counter value of the data packet, and wherein; the scheduling information is a scheduling grant for allocating an uplink resource to the mobile terminal for transmitting the data packet on an uplink, or the scheduling information indicates a downlink resource on which the data packet is transmitted to the mobile terminal, there is a number of Nfr feedback resources reserved for feedback transmission in the communication system each being associated to a feedback resource index, and each feedback resource for providing feedback for a respective data packet is chosen based on the equation;
feedback resource index=(current transmission number)modulo Nfr.
-
Specification