Latency reduction techniques for LTE transmission in unlicensed spectrum
First Claim
1. A method of wireless communication in a wireless communication system including listen-before-talk (LBT) access for transmissions, comprising:
- establishing, by a wireless communication device, a dedicated ultra-low latency (ULL) data bearer having LBT access rules for accessing at least a portion of an unlicensed frequency spectrum served by the wireless communication system, wherein the LBT access rules allow channel access with a faster access priority than control and signal traffic;
receiving, at the wireless communication device, ULL data for transmission;
mapping, by the wireless communication device, the ULL data for transmission to the dedicated ULL data bearer based at least on the LBT access rules; and
performing, by the wireless communication device, channel selection in the portion of the unlicensed frequency spectrum using the LBT access rules to identify a channel to use for transmission.
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Accused Products
Abstract
Various aspects described herein relate to reducing transmission latency in unlicensed spectrum. These latency reduction techniques include enabling ultra low latency (ULL) traffic to gain fast channel access. These latency reduction techniques further include updating a size of a contention window for channel access. In addition, these latency reduction techniques include enhancing CPDCCH-based signaling to accommodate the ULL frame structure. Further, these latency reduction techniques include providing robust operation against bursty interference for ULL transmissions. Moreover, these techniques include managing DRX for ULL. Additionally, these latency reduction techniques include joint scheduling of different TTI durations. These latency reduction techniques further include updating SRS transmission opportunities. In addition, these latency reduction techniques include reducing latency associated with PRACH transmissions. Further, these latency reduction techniques include reducing ULL transmission delays by either ignoring or cancelling scheduled uplink (e.g., LTE) transmissions.
12 Citations
22 Claims
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1. A method of wireless communication in a wireless communication system including listen-before-talk (LBT) access for transmissions, comprising:
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establishing, by a wireless communication device, a dedicated ultra-low latency (ULL) data bearer having LBT access rules for accessing at least a portion of an unlicensed frequency spectrum served by the wireless communication system, wherein the LBT access rules allow channel access with a faster access priority than control and signal traffic; receiving, at the wireless communication device, ULL data for transmission; mapping, by the wireless communication device, the ULL data for transmission to the dedicated ULL data bearer based at least on the LBT access rules; and performing, by the wireless communication device, channel selection in the portion of the unlicensed frequency spectrum using the LBT access rules to identify a channel to use for transmission. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. An apparatus for wireless communications using listen-before-talk (LBT) access for transmissions, comprising:
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a transceiver for communicating one or more wireless signals via one or more antennas; a memory configured to store instructions; and one or more processors communicatively coupled with the transceiver and the memory, wherein the one or more processors are configured to; establish a dedicated ultra-low latency (ULL) data bearer having LBT access rules for accessing at least a portion of an unlicensed frequency spectrum served by the wireless communication system, wherein the LBT access rules allow channel access with a faster access priority than control and signal traffic; receive ULL data for transmission; map the ULL data for transmission to the dedicated ULL data bearer based at least on the LBT access rules; and perform channel selection in the portion of the unlicensed frequency spectrum using the LBT access rules to identify a channel to use for transmission. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17)
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18. A non-transitory computer-readable medium storing computer executable code for wireless communications at a wireless communication device using listen-before-talk (LBT) access for transmissions, the code comprising:
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code for establishing, by the wireless communication device, a dedicated ultra-low latency (ULL) data bearer having LBT access rules for accessing at least a portion of an unlicensed frequency spectrum served by the wireless communication system, wherein the LBT access rules allow channel access with a faster access priority than control and signal traffic; code for receiving, at the wireless communication device, ULL data for transmission; code for mapping, by the wireless communication device, the ULL data for transmission to the dedicated ULL data bearer based at least on the LBT access rules; and code for performing, by the wireless communication device, channel selection in the portion of the unlicensed frequency spectrum using the LBT access rules to identify a channel to use for transmission. - View Dependent Claims (19, 20, 21, 22)
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Specification