LTE-U uplink waveform and variable multi-subframe scheduling
First Claim
1. A method comprising:
- determining an uplink resource block configuration comprising at least one set of resource blocks uniformly distributed in a portion of a bandwidth occupying at least a minimum predetermined bandwidth threshold;
receiving an assignment of one of a sound reference signal (SRS) or a channel use beacon signal (CUBS) for the at least one set of the resource blocks,wherein;
code sequences for the SRS are partitioned, orcode sequences for the CUBS are not orthogonal; and
sending a transmission in the at least one set of the resource blocks.
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Accused Products
Abstract
Uplink waveforms for operating long term evolution (LTE) in an unlicensed band (i.e., long term evolution-unlicensed (LTE-U) communication) are disclosed. Carrier aggregation (CA) and standalone (SA) are disclosed. LTE on the licensed channel may provide both control and data, LTE on the unlicensed channel may provide data. Managing variable transmission time interval (TTI) continuous transmission is disclosed for transmission over multiple subframes of an unlicensed carrier in LTE-U. Listen-before-talk (LBT) requirements of unlicensed carriers provide for additional channel occupancy constraints when scheduling resources for multiple UEs for variable TTI continuous uplink transmissions over multiple subframes. A joint control channel is disclosed that provides control information for all of the potentially available subframes to be scheduled for the uplink transmissions. In addition to management of the variable TTI continuous transmissions, adjustments to uplink signal parameters are also disclosed that address the constraints due to the LBT requirements of unlicensed carriers.
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Citations
80 Claims
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1. A method comprising:
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determining an uplink resource block configuration comprising at least one set of resource blocks uniformly distributed in a portion of a bandwidth occupying at least a minimum predetermined bandwidth threshold; receiving an assignment of one of a sound reference signal (SRS) or a channel use beacon signal (CUBS) for the at least one set of the resource blocks, wherein; code sequences for the SRS are partitioned, or code sequences for the CUBS are not orthogonal; and sending a transmission in the at least one set of the resource blocks. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. An apparatus comprising:
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means for determining an uplink resource block configuration comprising at least one set of resource blocks uniformly distributed in a portion of a bandwidth occupying at least a minimum predetermined bandwidth threshold; means for receiving an assignment of one of a sound reference signal (SRS) or a channel use beacon signal (CUBS) for the at least one set of the resource blocks, wherein; code sequences for the SRS are partitioned, or code sequences for the CUBS are not orthogonal; and means for sending a transmission in the at least one set of the resource blocks. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
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19. An apparatus comprising:
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at least one processor configured to; determine a uplink resource block configuration comprising at least one set of resource blocks uniformly distributed in a portion of a bandwidth occupying at least a minimum predetermined bandwidth threshold; and a transceiver configured to; receive an assignment of one of a sound reference signal (SRS) or a channel use beacon signal (CUBS) for the at least one set of the resource blocks, wherein code sequences for the SRS are partitioned or code sequences for the CUBS are not orthogonal; and send a transmission in the at least one set of the resource blocks; and a memory coupled to the at least one processor.
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20. A non-transitory computer-readable medium storing instructions, the instructions comprising:
one or more instructions that, when executed by at least one computer, cause the at least one computer to; determine a uplink resource block configuration comprising at least one set of resource blocks uniformly distributed in a portion of a bandwidth occupying at least a minimum predetermined bandwidth threshold; receive an assignment of one of a sound reference signal (SRS) or a channel use beacon signal (CUBS) for the at least one set of the resource blocks, wherein; code sequences for the SRS are partitioned, or code sequences for the CUBS are not orthogonal; and send a transmission in the at least one set of the resource blocks. - View Dependent Claims (21, 22, 23, 24, 25, 26, 27, 28)
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29. A method comprising:
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broadcasting an indication comprising a channel use beacon signal (CUBS) transmission for channel utilization based on detecting a clear channel in a clear channel assessment (CCA) occasion, wherein the clear channel is defined as an energy level below a threshold or no detection of the CUBS signal, and wherein at least one of; the CCA occasion occupies a fraction of an OFDM symbol duration, or the CUBS transmission is aligned to a predetermined OFDM symbol boundary; and continuously transmitting on at least one subframe succeeding the CUBS transmission. - View Dependent Claims (30, 31, 32, 33)
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34. An apparatus comprising:
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means for broadcasting an indication comprising a channel use beacon signal (CUBS) transmission for channel utilization in response to detecting a clear channel in a clear channel assessment (CCA) occasion, wherein the clear channel is defined as energy level below a threshold or no detection of a CUBS signal, wherein the CCA occasion comprises at least a first portion of a multiuse subframe, and wherein a second portion of the multiuse subframe is reserved for one or more of a downlink transmission, the CUBS transmission, or a guard period; and means for continuously transmitting on at least one subframe succeeding the CUBS transmission. - View Dependent Claims (35, 36, 37, 38)
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39. An apparatus comprising:
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a transceiver configured to; broadcast an indication comprising a channel use beacon signal (CUBS) transmission for channel utilization based on detecting a clear channel in a clear channel assessment (CCA) occasion, wherein the clear channel is defined as energy level below a threshold or no detection of the CUBS signal, and continuously transmit on at least one subframe succeeding the CUBS transmission, wherein at least one of; the CCA occasion occupies a fraction of an OFDM symbol duration, or the CUBS transmission is aligned to a predetermined OFDM symbol boundary; and a memory coupled to the transceiver. - View Dependent Claims (40, 41, 42, 43)
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44. A non-transitory computer-readable medium storing instructions, the instructions comprising:
one or more instructions that, when executed by at least one computer, cause the at least one computer to; broadcast an indication comprising a channel use beacon signal (CUBS) transmission for channel utilization in response to detecting a clear channel in a clear channel assessment (CCA) occasion, wherein the clear channel is defined as energy level below a threshold or no detection of the CUBS signal, and wherein at least one of; the CCA occasion occupies a fraction of an OFDM symbol duration, or the CUBS transmission is aligned to a predetermined OFDM symbol boundary; and continuously transmit on at least one subframe succeeding the CUBS transmission. - View Dependent Claims (45, 46, 47, 48)
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49. A method comprising:
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determining an uplink resource block configuration comprising a first set of dynamically scheduled resource blocks and a second set of resource blocks on an edge of a channel bandwidth, the uplink resource block configuration occupying at least a minimum predetermined bandwidth threshold; receiving an assignment of one of a sound reference signal (SRS) or a channel use beacon signal (CUBS) for at least one resource block in at least one of the first set of dynamically scheduled resource blocks or the second set of resource blocks, wherein; code sequences for the SRS are partitioned, or code sequences for the CUBS are not orthogonal; and sending a transmission in the at least one resource block. - View Dependent Claims (50, 51, 52, 53, 54, 55, 56)
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57. An apparatus comprising:
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means for determining an uplink resource block configuration comprising a first set of dynamically scheduled resource blocks and a second set of resource blocks on an edge of a channel bandwidth, the uplink resource block configuration occupying at least a minimum predetermined bandwidth threshold; means for receiving an assignment of one of a sound reference signal (SRS) or a channel use beacon signal (CUBS) for at least one resource block in at least one of the first set of dynamically scheduled resource blocks or the second set of resource blocks, wherein; code sequences for the SRS are partitioned, or code sequences for the CUBS are not orthogonal; and means for sending a transmission in the at least one resource block. - View Dependent Claims (58, 59, 60, 61, 62, 63, 64)
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65. An apparatus comprising:
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at least one processor configured to; determine an uplink resource block configuration comprising a first set of dynamically scheduled resource blocks and a second set of resource blocks on an edge of a channel bandwidth, the uplink resource block configuration occupying at least a minimum predetermined bandwidth threshold; a transceiver configured to; receive an assignment of one of a sound reference signal (SRS) or a channel use beacon signal (CUBS) for at least one resource block in at least one of the first set of dynamically scheduled resource blocks or the second set of resource blocks, wherein; code sequences for the SRS are partitioned, or code sequences for the CUBS are not orthogonal, and send a transmission in the at least one resource block; and a memory coupled to the at least one processor. - View Dependent Claims (66, 67, 68, 69, 70, 71, 72)
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73. A non-transitory computer-readable medium storing instructions, the instructions comprising:
one or more instructions that, when executed by at least one computer, cause the at least one computer to; determine an uplink resource block configuration comprising a first set of dynamically scheduled resource blocks and a second set of resource blocks on an edge of a channel bandwidth, the uplink resource block configuration occupying at least a minimum predetermined bandwidth threshold; receive an assignment of one of a sound reference signal (SRS) or a channel use beacon signal (CUBS) for at least one resource block in at least one of the first set of dynamically scheduled resource blocks or the second set of resource blocks, wherein; code sequences for the SRS are partitioned, or code sequences for the CUBS are not orthogonal; and send a transmission in the at least one resource block. - View Dependent Claims (74, 75, 76, 77, 78, 79, 80)
Specification