Asynchronous retransmission protocol
First Claim
1. An apparatus for transmitting data over a physical uplink shared channel in a wireless communication system using an asynchronous hybrid automatic repeat request, HARQ, the apparatus comprising:
- a first timer configured to start upon uplink data transmission and expire after a first predetermined time;
a second timer configured to start upon expiry of the first timer and to expire after a second predetermined time;
a receiver for receiving downlink control information including a positive acknowledgement for the uplink data transmission or retransmission, or a resource assignment accompanied by a field for distinguishing between a new transmission and a retransmission, wherein the resource assignment accompanied by the field indicating the retransmission indicates that uplink data of the uplink data transmission has not been successfully decoded, and wherein the receiver is configured to perform the receiving only when the first timer is expired and the second timer is running; and
a transmitter for performing HARQ retransmission of the uplink data according to the received resource assignment in the physical uplink shared channel upon receiving the resource assignment,wherein the second timer is further configured to stop upon receiving the positive acknowledgement.
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Accused Products
Abstract
The present disclosure relates to transmitting data over a physical uplink shared channel in a wireless communication system by using an asynchronous hybrid automatic repeat request, HARQ. An exemplary apparatus comprises a first timer configured to start upon uplink data transmission and stop after a first predetermined time; a second timer configured to start upon stop of the first timer and to stop after a second predetermined time; a receiver for receiving downlink control information including a positive acknowledgement for uplink new data transmission or retransmission, the receiver being configured to perform the receiving only when the first timer is stopped and the second timer is running, wherein the second timer is further configured to stop upon receiving the positive acknowledgement. Moreover, an apparatus for receiving the data and transmitting the control channel is provided as well as the corresponding transmitting and receiving method.
20 Citations
11 Claims
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1. An apparatus for transmitting data over a physical uplink shared channel in a wireless communication system using an asynchronous hybrid automatic repeat request, HARQ, the apparatus comprising:
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a first timer configured to start upon uplink data transmission and expire after a first predetermined time; a second timer configured to start upon expiry of the first timer and to expire after a second predetermined time; a receiver for receiving downlink control information including a positive acknowledgement for the uplink data transmission or retransmission, or a resource assignment accompanied by a field for distinguishing between a new transmission and a retransmission, wherein the resource assignment accompanied by the field indicating the retransmission indicates that uplink data of the uplink data transmission has not been successfully decoded, and wherein the receiver is configured to perform the receiving only when the first timer is expired and the second timer is running; and a transmitter for performing HARQ retransmission of the uplink data according to the received resource assignment in the physical uplink shared channel upon receiving the resource assignment, wherein the second timer is further configured to stop upon receiving the positive acknowledgement. - View Dependent Claims (2, 3, 4)
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5. Apparatus for receiving data over a physical downlink shared channel in a wireless communication system by using an asynchronous hybrid automatic repeat request, HARQ, the apparatus comprising:
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a receiver configured to receive downlink control information including resource assignment for downlink transmission and to perform reception of data in the assigned resources accordingly, and to perform transmissions of acknowledgement related to said downlink transmission, the apparatus further comprises a first timer which is configured to start upon the downlink transmission and expire after a predetermined time; and a second timer configured to start upon expiry of the first timer and to expire after a second predetermined time, the receiver being configured to receive the downlink control information only when the first timer is expired and the second timer is running, wherein the second timer is further configured not to start upon transmitting a positive acknowledgement.
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6. An apparatus for receiving data over a physical uplink shared channel in a wireless communication system by using an asynchronous hybrid automatic repeat request, HARQ, the apparatus comprising:
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a first timer configured to start upon uplink data reception and expire after a first predetermined time; a second timer configured to start upon expiry of the first timer and to expire after a second predetermined time; and a transmitter for transmitting downlink control information including a positive acknowledgement for uplink new data transmission or retransmission, the transmitter being configured to perform the transmitting only when the first timer is expired and the second timer is running, wherein the second timer is further configured to stop upon transmitting the positive acknowledgement.
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7. A method for transmitting data over a physical uplink shared channel in a wireless communication system using an asynchronous hybrid automatic repeat request, HARQ, comprising:
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starting a first timer upon uplink data transmission and expiring the first timer after a first predetermined time; starting a second timer upon expiry of the first timer and expiring the second timer after a second predetermined time; receiving downlink control information including a positive acknowledgement for the uplink data transmission or retransmission, or a resource assignment accompanied by a field for distinguishing between a new transmission and retransmission, wherein the resource assignment accompanied by the field indicating retransmission indicates that uplink data of the uplink data transmission has not been successfully decoded, and wherein the receiving is only performed when the first timer is expired and the second timer is running; and performing HARQ retransmission of the uplink data according to the received resource assignment in the physical uplink shared channel upon receiving the resource assignment, wherein the second timer stops upon receiving the positive acknowledgement. - View Dependent Claims (8, 9)
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10. A method for receiving data over a physical downlink shared channel in a wireless communication system by using an asynchronous hybrid automatic repeat request, HARQ, the method comprising:
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receiving downlink control information including resource assignment for downlink transmission; and
performing reception of data in the assigned resources accordingly, and transmitting acknowledgement related to said downlink transmission,starting a first timer upon the downlink transmission and expiring the first timer after a predetermined time, starting a second timer upon stopping the first timer and expiring the second timer after a second predetermined time, wherein the second timer starts irrespectively of whether or not a positive acknowledgement for the downlink transmission is transmitted, and receiving the downlink control information only when the first timer is expired and the second timer is running, wherein the second timer stops upon transmitting the positive acknowledgement.
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11. A method for receiving data over a physical uplink shared channel in a wireless communication system by using an asynchronous hybrid automatic repeat request, HARQ, comprising:
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starting a first timer upon uplink data reception and expiring the first timer after a first predetermined time; starting a second timer upon expiring the first timer and expiring the second timer after a second predetermined time; and transmitting downlink control information including a positive acknowledgement for uplink new data transmission or retransmission, wherein the transmitting is performed only when the first timer is expired and the second timer is running, wherein the second timer stops upon transmitting the positive acknowledgement.
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Specification