Method and apparatus for scheduling user equipment uplink transmissions on an unlicensed carrier
First Claim
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1. A method in a user equipment, the method comprising:
- receiving, in a subframe, a grant for transmitting 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;
performing listen before talk on the unlicensed carrier to determine an earliest unoccupied subframe in the set of subframes; and
transmitting physical uplink shared channel transmissions in multiple subframes within the set of subframes on the unlicensed carrier, starting with the earliest unoccupied subframe, in response to receiving the grant,wherein the grant comprises a first grant for transmitting physical uplink shared channel including a hybrid automatic repeat request identifier,wherein the method further comprises;
determining a new hybrid automatic repeat request identifier for each physical uplink shared channel transmission of the physical uplink shared channel transmissions in the multiple subframes made in response to the first grant, where the new hybrid automatic repeat request identifier is determined based on the received hybrid automatic repeat request identifier and a subframe index of each subframe of the multiple subframes;
receiving, after receiving the first grant, a second grant requesting a retransmission, where the second grant includes at least one new hybrid automatic repeat request identifier that was previously determined by the user equipment; and
transmitting physical uplink shared channel in response to the second grant to retransmit the data that is associated with the same new hybrid automatic repeat request identifier.
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Abstract
A method and apparatus schedule user equipment uplink transmissions on an unlicensed carrier. A grant for transmitting physical uplink shared channel on a serving cell operating on an unlicensed carrier can be received in a subframe. A set of subframes can be determined for possible transmission of the physical uplink shared channel. Listen before talk can be performed on the unlicensed carrier to determine an earliest unoccupied subframe in the set of subframes. A physical uplink shared channel can be transmitted in multiple subframes within the set of subframes on the unlicensed carrier, starting with the earliest unoccupied subframe, in response to receiving the grant.
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Citations
31 Claims
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1. A method in a user equipment, the method comprising:
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receiving, in a subframe, a grant for transmitting 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; performing listen before talk on the unlicensed carrier to determine an earliest unoccupied subframe in the set of subframes; and transmitting physical uplink shared channel transmissions in multiple subframes within the set of subframes on the unlicensed carrier, starting with the earliest unoccupied subframe, in response to receiving the grant, wherein the grant comprises a first grant for transmitting physical uplink shared channel including a hybrid automatic repeat request identifier, wherein the method further comprises; determining a new hybrid automatic repeat request identifier for each physical uplink shared channel transmission of the physical uplink shared channel transmissions in the multiple subframes made in response to the first grant, where the new hybrid automatic repeat request identifier is determined based on the received hybrid automatic repeat request identifier and a subframe index of each subframe of the multiple subframes; receiving, after receiving the first grant, a second grant requesting a retransmission, where the second grant includes at least one new hybrid automatic repeat request identifier that was previously determined by the user equipment; and transmitting physical uplink shared channel in response to the second grant to retransmit the data that is associated with the same new hybrid automatic repeat request identifier. - 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, in a subframe, a grant for transmitting physical uplink shared channel on a serving cell operating on an unlicensed spectrum; and a controller configured to determine a set of subframes for possible transmission of the physical uplink shared channel, 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 physical uplink shared channel transmissions in multiple subframes within the set of subframes on the unlicensed carrier, starting with the earliest unoccupied subframe, in response to receiving the grant, wherein the grant comprises a first grant for transmitting physical uplink shared channel including a hybrid automatic repeat request identifier, wherein the controller is configured to determine a new hybrid automatic repeat request identifier for each physical uplink shared channel transmission of the physical uplink shared channel transmissions in the multiple subframes made in response to the grant, where the new hybrid automatic repeat request identifier is determined based on the received hybrid automatic repeat request identifier and a subframe index of each subframe of the multiple subframes, and wherein the transceiver is configured to receive, after receiving the first grant, a second grant requesting a retransmission, where the second grant includes at least one new hybrid automatic repeat request identifier that was previously determined, and configured to transmit physical uplink shared channel in response to the second grant to retransmit the data that is associated with the same new hybrid automatic repeat request identifier. - View Dependent Claims (11, 12)
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13. A method in a user equipment, the method comprising:
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receiving, in a subframe, a grant for transmitting 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; performing listen before talk on the unlicensed carrier to determine an earliest unoccupied subframe in the set of subframes; and transmitting physical uplink shared channel transmissions in multiple subframes within the set of subframes on the unlicensed carrier, starting with the earliest unoccupied subframe, in response to receiving the grant, wherein the grant for transmitting physical uplink shared channel includes a hybrid automatic repeat request identifier, wherein the method further comprises; including the hybrid automatic repeat request identifier along with each physical uplink shared channel transmission in the multiple subframes; and including a hybrid automatic repeat request sub identifier along with each physical uplink shared channel transmission of the physical uplink shared channel transmissions in the multiple subframes, where the hybrid automatic repeat request sub identifier is set to 0 for a first physical uplink shared channel transmission of the physical uplink shared channel transmissions in the multiple subframes, is set to 1 for a second physical uplink shared channel transmission of the physical uplink shared channel transmission in the multiple subframes, and is incremented for each subsequent physical uplink shared channel transmission of the physical uplink shared channel transmissions in the multiple subframes. - View Dependent Claims (14, 15, 16, 17, 18, 19)
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20. A method in a user equipment, the method comprising:
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receiving, in a subframe, a grant for transmitting 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; performing listen before talk on the unlicensed carrier to determine an earliest unoccupied subframe in the set of subframes; and transmitting physical uplink shared channel transmissions in multiple subframes within the set of subframes on the unlicensed carrier, starting with the earliest unoccupied subframe, in response to receiving the grant, wherein the grant for transmitting physical uplink shared channel includes a hybrid automatic repeat request identifier, and wherein the method further comprises; determining a new hybrid automatic repeat request identifier for each physical uplink shared channel transmission of the physical uplink shared channel transmissions in the multiple subframes made in response to the grant, where the new hybrid automatic repeat request identifier is determined based on the received hybrid automatic repeat request identifier and an order of the physical uplink shared channel transmission within the physical uplink shared channel transmission in the multiple subframes; and transmitting each new hybrid automatic repeat request identifier along with each physical uplink shared channel transmission. - View Dependent Claims (21, 22, 23, 24, 25)
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26. A method in a user equipment, the method comprising:
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receiving, in a subframe, a grant for transmitting 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; performing listen before talk on the unlicensed carrier to determine an earliest unoccupied subframe in the set of subframes; and transmitting physical uplink shared channel transmissions in multiple subframes within the set of subframes on the unlicensed carrier, starting with the earliest unoccupied subframe, in response to receiving the grant, wherein the method further comprises; determining a new hybrid automatic repeat request identifier for each physical uplink shared channel transmission of the physical uplink shared channel transmissions in the multiple subframes made in response to the grant, where the new hybrid automatic repeat request identifier is determined based on the received hybrid automatic repeat request identifier and a subframe index of each subframe of the multiple subframes receiving multiple new data indicators within the grant, where each new data indicator is associated with each subframe within the determined set of subframes for possible transmission of physical uplink shared channel; and transmitting either new data or retransmission in each subframe according to the new data indicator, where the subframe index of each subframe of the multiple subframes is a position of each subframe within the set of subframes. - View Dependent Claims (27, 28)
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29. An apparatus comprising:
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a transceiver to receive, in a subframe, a grant for transmitting physical uplink shared channel on a serving cell operating on an unlicensed spectrum; and a controller to determine a set of subframes for possible transmission of the physical uplink shared channel, 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 transmits physical uplink shared channel transmissions in multiple subframes within the set of subframes on the unlicensed carrier, starting with the earliest unoccupied subframe, in response to receiving the grant, wherein the grant for transmitting physical uplink shared channel includes a hybrid automatic repeat request identifier, and wherein the controller; includes the hybrid automatic repeat request identifier along with each physical uplink shared channel transmission in the multiple subframes, and includes a hybrid automatic repeat request sub identifier along with each physical uplink shared channel transmission of the physical uplink shared channel transmissions in the multiple subframes, where the hybrid automatic repeat request sub identifier is set to 0 for a first physical uplink shared channel transmission of the physical uplink shared channel transmissions in the multiple subframes, is set to 1 for a second physical uplink shared channel transmission of the physical uplink shared channel transmission in the multiple subframes, and is incremented for each subsequent physical uplink shared channel transmission of the physical uplink shared channel transmissions in the multiple subframes.
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30. An apparatus comprising:
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a transceiver to receive, in a subframe, a grant for transmitting physical uplink shared channel on a serving cell operating on an unlicensed spectrum; and a controller to determine a set of subframes for possible transmission of the physical uplink shared channel, 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 transmits physical uplink shared channel transmissions in multiple subframes within the set of subframes on the unlicensed carrier, starting with the earliest unoccupied subframe, in response to receiving the grant, wherein the grant for transmitting physical uplink shared channel includes a hybrid automatic repeat request identifier, wherein controller determines a new hybrid automatic repeat request identifier for each physical uplink shared channel transmission of the physical uplink shared channel transmissions in the multiple subframes made in response to the grant, where the new hybrid automatic repeat request identifier is determined based on the received hybrid automatic repeat request identifier and an order of the physical uplink shared channel transmission within the physical uplink shared channel transmission in the multiple subframes, and wherein the transceiver transmits each new hybrid automatic repeat request identifier along with each physical uplink shared channel transmission.
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31. An apparatus comprising:
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a transceiver to receive, in a subframe, a grant for transmitting physical uplink shared channel on a serving cell operating on an unlicensed spectrum; and a controller to determine a set of subframes for possible transmission of the physical uplink shared channel, 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 transmits physical uplink shared channel transmissions in multiple subframes within the set of subframes on the unlicensed carrier, starting with the earliest unoccupied subframe, in response to receiving the grant, wherein the controller determines a new hybrid automatic repeat request identifier for each physical uplink shared channel transmission of the physical uplink shared channel transmissions in the multiple subframes made in response to the grant, where the new hybrid automatic repeat request identifier is determined based on the received hybrid automatic repeat request identifier and a subframe index of each subframe of the multiple subframes, wherein the transceiver; receives multiple new data indicators within the grant, where each new data indicator is associated with each subframe within the determined set of subframes for possible transmission of physical uplink shared channel, and transmits either new data or retransmission in each subframe according to the new data indicator, and wherein the subframe index of each subframe of the multiple subframes is a position of each subframe within the set of subframes.
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Specification