CONTENTION-BASED TRANSMISSION WITH CONTENTION-FREE FEEDBACK FOR REDUCING LATENCY IN LTE ADVANCED NETWORKS AND ENHANCED PUCCH
First Claim
1. A method performed by user equipment (UE) for random access comprising:
- transmitting a contention sequence on a first physical uplink channel to an enhanced-Node B (eNB); and
transmitting data requesting uplink resources on a second physical uplink channel to the eNB,wherein the contention sequence is transmitted on the first physical uplink channel in accordance with a format that is assigned by the eNB, andwherein the contention sequence is either randomly selected by the UE or assigned by the eNB.
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Accused Products
Abstract
Methods for contention-based transmission with contention-free feedback for reduced latency in LTE Advanced networks and an enhanced PUCCH are generally disclosed herein. User equipment (UE) may transmit a contention sequence on a physical uplink control channel (PUCCH) to an enhanced-Node B (eNB) and may concurrently transmit data requesting uplink resources on a physical uplink shared channel (PUSCH) to the eNB. The contention sequence is transmitted on the PUCCH in accordance with a format that is assigned by the eNB. The contention sequence is either randomly selected by the UE or assigned by the eNB. When the contention sequence and data are not successfully received by the eNB, the UE may fall back to a more conventional random access channel (RACH) procedure for uplink resource allocation.
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Citations
21 Claims
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1. A method performed by user equipment (UE) for random access comprising:
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transmitting a contention sequence on a first physical uplink channel to an enhanced-Node B (eNB); and transmitting data requesting uplink resources on a second physical uplink channel to the eNB, wherein the contention sequence is transmitted on the first physical uplink channel in accordance with a format that is assigned by the eNB, and wherein the contention sequence is either randomly selected by the UE or assigned by the eNB. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. User equipment (UE) comprising physical-layer circuitry configured to:
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transmit a contention sequence on a physical uplink control channel (PUCCH) to an enhanced-Node B (eNB); and transmit data requesting uplink resources on a physical uplink shared channel (PUSCH) to the eNB, wherein the data transmitted on the PUSCH indicates that the UE is requesting uplink channel resources for a subsequent uplink data transmission, and wherein the contention sequence is transmitted on the PUCCH in accordance with a format that is assigned by the eNB. - View Dependent Claims (9, 10, 11, 12, 13)
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14. A method for random access by user equipment (UE), the method comprising:
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transmitting a contention sequence in a reference signal portion of a physical uplink control channel (PUCCH) and data in a data portion of the PUCCH, wherein the data is sent in one or more resource blocks (RBs) of the data portion of the PUCCH, wherein two OFDM symbols are allocated for the reference signal portion for the transmission of the contention sequence. - View Dependent Claims (15, 16, 17)
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18. A method performed by an enhanced-Node B (eNB) for receiving on an enhanced physical uplink control channel (PUCCH),
wherein the PUCCH comprises first and second slots, each slot including three demodulation reference symbols (DMRS) and four data symbols, wherein the method further comprises: -
receiving thirty-six preamble sequences that are spread two-dimensionally over seventy-two subcarriers that carry the DMRS reference symbols; and receiving a plurality of up to forty-five or more information bits of data over ninety-six subcarriers of the four data symbols. - View Dependent Claims (19, 20, 21)
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Specification