System and method for transmission in a grant-free uplink transmission scheme
First Claim
1. A method comprising:
- receiving, by a user equipment (UE), a high-level signaling information regarding a first contention transmission unit (CTU) access region for an initial transmission in a first transmission time interval (TTI) and a second CTU access region for a redundant transmission in a second TTI;
transmitting, by the UE, to a base station (BS), the initial transmission using at least one CTU in the first CTU access region during the first TTI without scheduling signaling from the BS; and
transmitting, by the UE, to the BS, the redundant transmission using at least one CTU in the second CTU access region during the second TTI without waiting for acknowledgement/negative acknowledgement (ACK/NACK) feedback.
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Accused Products
Abstract
A system and method includes implementing, by a base station (BS), a reliable ultra-low latency transmission mechanism in a grant-free uplink transmission scheme having defined therein contention transmission unit (CTU) access regions and a plurality of CTUs. Implementing the reliable ultra-low latency transmission mechanism includes defining a reliable ultra-low latency CTU (RULL-CTU) access region from a portion of the CTU access regions of the grant-free transmission scheme, defining an RULL-CTU mapping scheme by mapping at least a portion of plurality of CTUs to the RULL-CTU access region to define a plurality of RULL-CTUs, defining a reliable ultra-low latency user equipment (RULL-UE) mapping scheme by defining rules for mapping a plurality of RULL-UEs to the plurality of RULL-CTUs in an initial pattern for initial transmissions in a first transmission time interval (TTI), and a regrouped pattern for redundant transmissions in a second TTI subsequent to the first TTI.
21 Citations
20 Claims
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1. A method comprising:
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receiving, by a user equipment (UE), a high-level signaling information regarding a first contention transmission unit (CTU) access region for an initial transmission in a first transmission time interval (TTI) and a second CTU access region for a redundant transmission in a second TTI; transmitting, by the UE, to a base station (BS), the initial transmission using at least one CTU in the first CTU access region during the first TTI without scheduling signaling from the BS; and transmitting, by the UE, to the BS, the redundant transmission using at least one CTU in the second CTU access region during the second TTI without waiting for acknowledgement/negative acknowledgement (ACK/NACK) feedback. - View Dependent Claims (2, 3, 4, 5)
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6. A method comprising:
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transmitting, by a base station (BS), to a user equipment (UE), a high-level signaling information regarding a first contention transmission unit (CTU) access region for an initial transmission in a first transmission time interval (TTI) and a second CTU access region for a redundant transmission in a second TTI; receiving, by the BS, from the UE, the initial transmission on at least one CTU in the first CTU access region during the first TTI without transmitting scheduling signaling by the BS to the UE; and receiving, by the BS, from the UE, the redundant transmission on at least one CTU in the second CTU access region during the second TTI without transmitting acknowledgement/negative acknowledgement (ACK/NACK) feedback by the BS to the UE. - View Dependent Claims (7, 8, 9, 10)
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11. A user equipment (UE) comprising:
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a hardware processor; and a computer readable storage medium having stored thereon computer readable code for execution by the processor to cause the UE to; receive a high-level signaling information regarding a first contention transmission unit (CTU) access region for an initial transmission in a first transmission time interval (TTI) and a second CTU access region for a redundant transmission in a second TTI; transmit, to a base station (BS), the initial transmission using at least one CTU in the first CTU access region during the first TTI without scheduling signaling from the BS; and transmit, to the BS, the redundant transmission using at least one CTU in the second CTU access region during the second TTI without waiting for acknowledgement/negative acknowledgement (ACK/NACK) feedback. - View Dependent Claims (12, 13, 14, 15)
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16. A base station (BS) comprising:
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a hardware processor; and a computer readable storage medium having stored thereon computer readable code for execution by the processor to cause the BS to; transmit, to a user equipment (UE), a high-level signaling information regarding a first contention transmission unit (CTU) access region for an initial transmission in a first transmission time interval (TTI) and a second CTU access region for a redundant transmission in a second TTI; receive, from the UE, the initial transmission on at least one CTU in the first CTU access region during the first TTI without transmitting scheduling signaling by the BS to the UE; and receive, from the UE, the redundant transmission on at least one CTU in the second CTU access region during the second TTI without transmitting acknowledgement/negative acknowledgement (ACK/NACK) feedback by the BS to the UE. - View Dependent Claims (17, 18, 19, 20)
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Specification