Autonomous timing adjustment for a wireless device
A wireless device and network node are provided. According to one aspect, the wireless device includes processing circuitry configured to determine at least a first timing adjustment parameter based on at least a first numerology 5 parameter and adjust the timing of an uplink transmission based on the first timing adjustment parameter. According to another aspect, a method includes a timing adjustment parameter determiner module configured to determine at least a first timing adjustment parameter based on at least a first numerology parameter. The method also includes a timing adjustment module configured to adjust the timing of an uplink transmission based on the first timing adjustment parameter. These arrangements allow for the preservation of network node reception performance.
1. A method in a wireless device of adjusting timing of transmissions, the method comprising:
determining at least a first timing adjustment parameter to advance a start time of an uplink transmission relative to a timing of a downlink signal using at least a first numerology parameter, the first timing adjustment parameter being one of:
a maximum adjustment amount of one adjustment step based on a subcarrier spacing;
a frequency of a timing adjustment based on a carrier frequency of the uplink transmission; and
an aggregate adjustment rate at which the wireless device updates an uplink transmission timing, the aggregate adjustment rate being based on a subcarrier spacing; and
advance the start time of the uplink transmission based on the first timing adjustment parameter.
2. The method of claim 1 , further comprising transmitting the uplink signals according to the adjusted uplink transmit timing.
3. The method of claim 1 , wherein the uplink transmit timing adjustment is based on at least one of a characteristic of an uplink signal, a characteristic of a downlink signal and numerology parameters.
4. The method of claim 1 , further comprising:
determining a second timing adjustment parameter based on a second numerology parameter;
determining a numerology to be used by the wireless device for uplink transmissions;
selecting one of the first timing adjustment parameter and the second timing adjustment parameter based on the determined numerology; and
applying the selected one of the first and second timing adjustment parameters to advance a start time of another uplink transmission relative to a timing of another downlink signal.
5. The method of claim 4 , wherein the first timing adjustment parameter is based on a determined uplink numerology and the second timing adjustment parameter is based on a determined downlink numerology.
6. The method of claim 4 , wherein at least one of the first and second numerology parameter comprises one or more of: frame duration, subframe duration, transmission time interval (TTI) duration, slot duration, symbol duration and number of symbols per slot and subframe, subcarrier spacing, sampling frequency, fast Fourier transform (FFT) size, number of subcarriers per resource Block (RB), number of RBs within the bandwidth, and cyclic prefix length.
7. The method of claim 1 , wherein the at least the first timing adjustment parameter is determined autonomously by the wireless device.
8. The method of claim 1 , wherein the at least the first timing adjustment parameter is determined based on one of a rule and a predefined value received from a network node.
9. The method of claim 1 , wherein the at least the first timing adjustment parameter is further determined based on one of an uplink bandwidth and a downlink bandwidth.
10. The method of claim 1 , wherein the at least the first timing adjustment parameter is a timing advance command received from a network node.
11. A wireless device configured for adjusting timing of transmissions, the wireless device comprising:
processing circuitry configured to:
determine at least a first timing adjustment parameter to advance a start time of an uplink transmission relative to a timing of a downlink signal using at least a first numerology parameter, the first timing adjustment parameter being one of:
a maximum adjustment amount of one adjustment step based on a subcarrier spacing;
a frequency of a timing adjustment based on a carrier frequency of the uplink transmission; and
an aggregate adjustment rate at which the wireless device updates an uplink transmission timing, the aggregate adjustment rate being based on a subcarrier spacing; and
advance the start time of the uplink transmission based on the first timing adjustment parameter.
12. The wireless device of claim 11 , further comprising transmitting the uplink signals according to the adjusted uplink transmit timing.
13. The wireless device of claim 11 , wherein the uplink transmit timing adjustment is based on at least one of a characteristic of an uplink signal, a characteristic of a downlink signal and numerology parameters.
14. The wireless device of claim 11 , wherein the processing circuitry is further configured to:
determine a second timing adjustment parameter using a second numerology parameter;
determine a numerology to be used by the wireless device for uplink transmissions;
select one of the first timing adjustment parameter and the second timing adjustment parameter based on the determined numerology; and
apply the selected one of the first and second timing adjustment parameters to advance a start time of another uplink transmission relative to a timing of another downlink signal.
15. The wireless device of claim 14 , wherein the first timing adjustment parameter is based on a determined uplink numerology and the second timing adjustment parameter is based on a determined downlink numerology.
16. The wireless device of claim 14 , wherein at least one of the first and second numerology parameter comprises one or more of: frame duration, subframe duration, transmission time interval (TTI) duration, slot duration, symbol duration and number of symbols per slot and subframe, subcarrier spacing, sampling frequency, fast Fourier transform (FFT) size, number of subcarriers per resource Block (RB), number of RBs within the bandwidth, and cyclic prefix length.
17. The wireless device of claim 11 , wherein the at least the first timing adjustment parameter is determined autonomously by the wireless device.
18. The wireless device of claim 11 , wherein the at least the first timing adjustment parameter is determined based on one of a rule and a predefined value received from a network node.
19. The wireless device of claim 11 , wherein the at least the first timing adjustment parameter is further determined based on one of an uplink bandwidth and a downlink bandwidth.
20. The wireless device of claim 11 , wherein the at least the first timing adjustment parameter is a timing advance command received from a network node.
21. A method in a network node for adjusting timing of received signals, the method comprising:
determining at least a first timing adjustment parameter to advance a start time of an uplink transmission of a wireless device relative to a timing of a downlink signal using at least a first numerology parameter, the first timing adjustment parameter being one of:
a maximum adjustment amount of one adjustment step based on a subcarrier spacing;
a frequency of a timing adjustment based on a carrier frequency of the uplink transmission; and
an aggregate adjustment rate at which the wireless device updates an uplink transmission timing, the aggregate adjustment rate being based on a subcarrier spacing; and
adapting at least one parameter of a receiver of the network node based on the at least one first timing adjustment parameter that advances the start time of the uplink transmission of the wireless device.
22. A network node for adjusting timing of received signals, the network node comprising:
processing circuitry configured to:
determine at least a first timing adjustment parameter to advance a start time of an uplink transmission of a wireless device relative to a timing of a downlink signal using at least a first numerology parameter, the first timing adjustment parameter being one of:
a maximum adjustment amount of one adjustment step based on a subcarrier spacing;
a frequency of a timing adjustment based on a carrier frequency of the uplink transmission; and
an aggregate adjustment rate at which the wireless device updates an uplink transmission timing, the aggregate adjustment rate being based on a subcarrier spacing; and
adapt at least one parameter of a receiver of the network node based on the at least one first timing adjustment parameter that advances the start time of the uplink transmission of the wireless device.
23. The network node of claim 22 , wherein the processing circuitry further configured to receive uplink transmissions from the wireless device using the adapted at least one parameter of the receiver.
24. The network node of claim 22 , wherein the processing circuitry further configured to transmit to the wireless device a rule for determining the first timing adjustment parameter based on at least the first numerology.
25. The network node of claim 22 , wherein the processing circuitry further configured to transmit to the wireless device a pre-defined value for determining the first timing adjustment parameter based on at least the first numerology.
26. The network node of claim 22 , wherein the processing circuitry is further configured to transmit to the wireless device the first timing adjustment parameter based on at least the first numerology.
27. The network node of claim 26 , wherein the first timing adjustment parameter is a timing advance command.
28. The network node of claim 22 , wherein the first numerology parameter comprises one or more of: frame duration, subframe duration, transmission time interval (TTI) duration, slot duration, symbol duration and number of symbols per slot and subframe, subcarrier spacing, sampling frequency, fast Fourier transform (FFT) size, number of subcarriers per resource Block (RB), number of RBs within the bandwidth, and cyclic prefix length.