Method and apparatus for scheduling user equipment uplink transmissions on an unlicensed carrier
First Claim
1. A method in a user equipment, the method comprising:
- receiving a configuration indicating a window length from a higher layer, where the higher layer is higher than a physical layer;
receiving a grant in a subframe, the grant for transmitting a physical uplink shared channel on a serving cell operating on an unlicensed carrier;
determining a set of subframes for possible transmission of the physical uplink shared channel based on the window length and the subframe in which the grant is received;
performing listen before talk on the unlicensed carrier to determine an earliest unoccupied subframe in the set of subframes; and
transmitting the physical uplink shared channel in the earliest unoccupied subframe in response to receiving the grant,wherein the grant for transmitting the physical uplink shared channel includes a hybrid automatic retransmission request identifier, andwherein the method further comprises indicating the hybrid automatic retransmission request identifier along with the physical uplink shared channel transmission.
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Accused Products
Abstract
A method and apparatus schedule user equipment uplink transmissions on an unlicensed carrier. A configuration indicating a window length can be received from a higher layer, where the higher layer can be higher than a physical layer. A grant can be received in a subframe, where the grant can be for transmitting a physical uplink shared channel on a serving cell operating on an unlicensed carrier. A set of subframes for possible transmission of the physical uplink shared channel can be determined based on the window length and the subframe in which the grant is received. Listen before talk can be performed on the unlicensed carrier to determine an earliest unoccupied subframe in the set of subframes. The physical uplink shared channel can be transmitted in the earliest unoccupied subframe in response to receiving the grant.
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Citations
18 Claims
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1. A method in a user equipment, the method comprising:
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receiving a configuration indicating a window length from a higher layer, where the higher layer is higher than a physical layer; receiving a grant in a subframe, the grant for transmitting a physical uplink shared channel on a serving cell operating on an unlicensed carrier; determining a set of subframes for possible transmission of the physical uplink shared channel based on the window length and the subframe in which the grant is received; performing listen before talk on the unlicensed carrier to determine an earliest unoccupied subframe in the set of subframes; and transmitting the physical uplink shared channel in the earliest unoccupied subframe in response to receiving the grant, wherein the grant for transmitting the physical uplink shared channel includes a hybrid automatic retransmission request identifier, and wherein the method further comprises indicating the hybrid automatic retransmission request identifier along with the physical uplink shared channel transmission. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. An apparatus comprising:
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a transceiver configured to receive a configuration indicating a window length from a higher layer, where the higher layer is higher than a physical layer, and configured to receive a grant in a subframe, the grant for transmitting a physical uplink shared channel on a serving cell operating on an unlicensed carrier; and a controller coupled to the transceiver, the controller configured to determine a set of subframes for possible transmission of the physical uplink shared channel based on the window length and the subframe in which the grant is received, and configured to perform listen before talk on the unlicensed carrier to determine an earliest unoccupied subframe in the set of subframes, wherein the transceiver is configured to transmit the physical uplink shared channel in the earliest unoccupied subframe in response to receiving the grant, wherein the grant for transmitting the physical uplink shared channel includes a hybrid automatic retransmission request identifier, and wherein the transceiver is configured to indicate the hybrid automatic retransmission request identifier along with the physical uplink shared channel transmission. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17)
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18. A method in a user equipment, the method comprising:
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receiving a configuration indicating a window length from a higher layer in a long term evolution system, where the higher layer is higher than a physical layer; receiving a grant in a subframe, the grant for transmitting a physical uplink shared channel on a serving cell operating on an unlicensed carrier in the long term evolution system; determining a set of subframes for possible transmission of the physical uplink shared channel based on the window length and the subframe in which the grant is received, where the set of subframes includes a number of subframes, where the number of subframes in the set of subframes is equal to the window length; performing listen before talk on the unlicensed carrier to determine an earliest unoccupied subframe in the set of subframes; and transmitting the physical uplink shared channel in the earliest unoccupied subframe when the unoccupied subframe is unoccupied and when the unoccupied subframe is within the window length, wherein the grant for transmitting the physical uplink shared channel includes a hybrid automatic retransmission request identifier, and wherein the method further comprises indicating the hybrid automatic retransmission request identifier along with the physical uplink shared channel transmission.
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Specification