Apparatus and method for retransmitting data in a communication system
AssigneesSamsung Electronics Co., Ltd., Seoul National University Industry Foundation
InventorsSunghyun Choi, Youngkyu Choi, Yong-Hwan Lee
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Abstract
In retransmitting data by a transmitter in a mobile communication system, a transmitter sets an allowed number-of-transmissions Ctx for an initial transmission and a retransmission of a second data unit based on a first data unit, fragments the first data unit into N second data units, and then initially-transmits or retransmits the N second data units to the receiver within the allowed number-of-transmissions Ctx. The receiver receives the second data units, detects normal receipt or abnormal receipt of the received second data units, and transmits a response to the transmitter according to the detection result.
Claims26
A method for retransmitting data by a transmitter in a communication system, the method comprising the steps of:
- setting an allowed number-of-transmissions Ctx for an initial transmission and a retransmission of a second data unit based on a first data unit;
- if there is a first data unit to be transmitted to a receiver, fragmenting the first data unit into N second data units;
- and
- performing one of initially-transmitting and retransmitting the N second data units to the receiver within the allowed number-of-transmissions Ctx.
A method for retransmitting data by a transmitter in a communication system, the method comprising the steps of:
- initializing an allowed number-of-transmissions Ctx for an initial transmission and a retransmission of a second data unit based on a first data unit and a number Stx of transmission-succeeded second data units;
- fragmenting the first data unit into N second data units;
- initially-transmitting a particular second data unit among the N second data units to a receiver;
- decreasing the allowed number-of-transmissions Ctx by one;
- keeping a current value of the number Stx of transmission-succeeded second data units, upon detecting abnormal receipt of the initially-transmitted second data unit at the receiver;
- and
- retransmitting the abnormally received second data unit to the receiver exclusively when a difference between the N the second data units fragmented from the first data unit and the number Stx of transmission-succeeded second data units is less than the allowed number-of-transmissions Ctx.
An apparatus for retransmitting data in a communication system, the apparatus comprising:
- a receiver;
- and
- a transmitter for setting an allowed number-of-transmissions Ctx for an initial transmission and a retransmission of a second data unit based on a first data unit, fragmenting the first data unit into N second data units, and performing one of initially-transmitting and retransmitting the N second data units to the receiver within the allowed number-of-transmissions Ctx,
- wherein the receiver receives the second data units, detects one of a normal receipt and an abnormal receipt of the received second data units, and transmits a response to the transmitter according to the detection result.
An apparatus for retransmitting data in a communication system, the apparatus comprising:
- a receiver;
- and
- a transmitter for initializing an allowed number-of-transmissions Ctx for an initial transmission and a retransmission of a second data unit based on a first data unit and a number Stx of transmission-succeeded second data units, fragmenting the first data unit into N second data units, initial-transmitting a particular second data unit among the N second data units to the receiver, decreasing the allowed number-of-transmissions Ctx by one, keeping a current value of the number Stx of transmission-succeeded second data units, upon detecting abnormal receipt of the initial-transmitted second data unit at the receiver, and retransmitting the abnormally received second data unit to the receiver exclusively, when a difference between the N of the second data units fragmented from the first data unit and the number Stx of transmission-succeeded second data units is less than the allowed number-of-transmissions Ctx,
- wherein the receiver receives the second data units, detects one of a normal receipt and an abnormal receipt of the received second data units, and transmits a response to the transmitter according to the detection result.
Dependencies are inferred from the claim text.