UL scheduling timing with short TTIs in TDD
AssigneeTelefonaktiebolaget LM Ericsson (publ)
InventorsJingya Li, Laetitia Falconetti, Daniel Larsson, Henrik Sahlin, Gustav Wikström
Life of this patent
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Abstract
Systems and methods for determining and utilizing an uplink scheduling timing when using short Transmission Time Intervals (sTTIs) are disclosed. In some embodiments, a method of operation of a wireless device in a cellular communications network comprises receiving an uplink grant in sTTI n; determining, based on a configured uplink/downlink configuration, an uplink scheduling timing I; and transmitting, in a sTTI n+I, an uplink transmission in accordance with the uplink grant received in the sTTI n. In this manner, an uplink timing is determined and utilized when using sTTIs.
Claims26
A method of operation of a wireless device in a cellular communications network, comprising:
- receiving an uplink grant in short Transmission Transmit Interval (sTTI) n;
- and
- determining, based on a configured uplink/downlink configuration, an uplink scheduling timing l;
- and
- transmitting, in a sTTI n+l, an uplink transmission in accordance with the uplink grant received in the sTTI n;
- wherein determining the uplink scheduling timing l comprises determining the uplink scheduling timing l based on a predefined table that defines values of l for different values of n for the configured uplink/downlink configuration.
A wireless device in a cellular communications network, comprising:
- at least one transceiver;
- at least one processor;
- and
- memory comprising instructions executable by the at least one processor whereby the wireless device is operable to:
- receive an uplink grant in short Transmission Time Interval (sTTI) n;
- determine, based on a configured uplink/downlink configuration, an uplink scheduling timing l;
- and
- transmit, in a sTTI n+l, an uplink transmission in accordance with the uplink grant received in the sTTI n;
- wherein determining the uplink scheduling timing l comprises determining the uplink scheduling timing l based on a predefined table that defines values of l for different values of n for the configured uplink/downlink configuration.
A method of operation of a radio access node in a cellular communications network, comprising:
- transmitting an uplink grant to a wireless device in a short Transmission Time Interval (sTTI) n;
- and
- receiving, in a short TTI n+l, an uplink transmission from the wireless device in accordance with the uplink grant transmitted to the wireless device in the sTTI n, where l is an uplink scheduling timing U
- wherein the uplink scheduling timing l is determined based on a predefined table that defines values of l for different values of n for a Time Division Duplexing, TDD, unlink/downlink configuration.
A radio access node for a cellular communications network, comprising:
- at least one transceiver;
- at least one processor;
- and
- memory comprising instructions executable by the at least one processor whereby the radio access node is operable to:
- transmit an uplink grant to a wireless device in a short Transmission Time Interval (sTTI n);
- and
- receive, in a sTTI n+l, an uplink transmission from the wireless device in accordance with the uplink grant transmitted to the wireless device in the sTTI n, where l is an uplink scheduling timing l;
- wherein the uplink scheduling timing l is determined based on a predefined table that defines values of l for different values of n for a Time Division Duplexing, TDD, uplink/downlink configuration.
Dependencies are inferred from the claim text.