Timing alignment for wireless device to wireless device measurements
Methods, wireless devices (WD), and network nodes are disclosed. For example, there is disclosed a network node configured to communicate with a wireless device in a cell. The network node is further configured to, and/or includes a radio interface and/or includes processing circuitry configured to communicate a timing advance offset to the wireless device for adjusting the uplink transmission relative to the downlink reception in the cell. The timing offset is based on the timing offset used by another wireless device in another cell to adjust the timing of uplink transmission relative to the downlink reception timing. Furthermore, the cells are configured to operate using TDD configurations.
1. A network node configured to communicate with a wireless device in a cell, the network node comprising at least one of a radio interface and processing circuitry configured to:
communicate a timing offset to the wireless device for adjusting the uplink transmission relative to the downlink reception in the cell, the timing offset being based on the timing offset used by another wireless device in another cell to adjust the timing of uplink transmission relative to the downlink reception timing, the cells being configured to operate using Time Division Duplex (TDD) configurations, the timing offset being based on at least one or more of:
the propagation delay between the wireless device and the another wireless device;
the propagation delay between the wireless device and the network node;
the propagation delay between the another wireless device and the another network node;
a fixed offset between uplink reception timing and downlink transmission timing at the network node;
a fixed offset between uplink reception timing and downlink transmission timing at the another network node;
a cell radius of the network node; and
a timing advance.
2. The network node of claim 1 , wherein the timing offset is applied to the uplink transmission relative to the downlink reception timing, in the cell, when performing at least one Cross-Link Interference (CLI) measurement at least one CLI measurement is based on one of a Sounding Reference Signal-Reference Signal Received Power (SRS-RSRP) measurement and a Received Signal Strength Indicator (RSSI) based measurement.
3. The network node of claim 2 , wherein signal used for the CLI measurement is transmitted from the another wireless device.
4. The network node of claim 1 , wherein wireless device is a victim wireless device and the another wireless device is an aggressor wireless device.
5. A method implemented in a network node the network node being connected to a wireless device in a cell, the cell experience cross-link interference from another cell comprising another network node and another wireless device configured to implement a downlink reception timing adjustment to the uplink transmission, the cells operating using Time Division Duplex (TDD) configurations, the method comprising:
communicating a timing offset to the wireless device for adjusting the uplink transmission relative to the downlink reception in the cell, the timing offset being based on the timing offset used by the another wireless device in the another cell to adjust the timing of uplink transmission relative to the downlink reception timing, the timing offset being based on at least one or more of:
the propagation delay between the wireless device and the another wireless device;
the propagation delay between the wireless device and the network node;
the propagation delay between the another wireless device and the another network node;
a fixed offset between uplink reception timing and downlink transmission timing at the network node;
a fixed offset between uplink reception timing and downlink transmission timing at the another network node;
a cell radius of the network node; and
a timing advance.
6. The method of claim 5 , wherein the timing offset is applied to the uplink transmission relative to the downlink reception timing, in the cell, when performing at least one Cross-Link Interference (CLI) measurement at least one CLI measurement is based on one of a Sounding Reference Signal-Reference Signal Received Power (SRS-RSRP) measurement and a Received Signal Strength Indicator (RSSI) based measurement.
7. The method of claim 6 , wherein signal used for the CLI measurement is transmitted from the another wireless device.
8. The method of claim 5 , wherein wireless device is a victim wireless device and the another wireless device is an aggressor wireless device.
9. A wireless device configured to implement a timing adjustment to the uplink transmission relative to the downlink reception, the wireless device being connectable to a network node in a cell, the wireless device comprising at least one of a radio interface and processing circuitry configured to:
receive a timing offset from the network node; and
apply a timing offset value to the uplink transmission relative to the downlink reception timing, in the cell, when performing at least one Cross-Link Interference (CLI) measurement, the timing offset being based on the timing offset useable by another wireless device in another cell to adjust the timing of uplink transmission relative to the downlink reception timing, the cells being configured to operate using Time Division Duplex (TDD) configurations, the timing offset being based on at least one or more of:
the propagation delay between the wireless device and the another wireless device;
the propagation delay between the wireless device and the network node;
the propagation delay between the another wireless device and the another network node;
a fixed offset between uplink reception timing and downlink transmission timing at the network node;
a fixed offset between uplink reception timing and downlink transmission timing at the another network node;
a cell radius of the network node; and
a timing advance.
10. The wireless device of claim 9 , wherein the at least one CLI measurement is based on one of a Sounding Reference Signal-Reference Signal Received Power (SRS-RSRP) measurement and a Received Signal Strength Indicator (RSSI) based measurement.
11. The wireless device of claim 10 , wherein signal used for the CLI measurement is transmitted from the another wireless device.
12. The wireless device of claim 9 , wherein wireless device is a victim wireless device and the another wireless device is an aggressor wireless device.
13. A method implemented in a wireless device, the wireless device configured to implement a timing adjustment to the uplink transmission relative to the downlink reception, the wireless device being connected to a network node in a cell, the cell experience cross-link interference from another cell comprising another network node and another wireless device configured to implement a downlink reception timing adjustment to the uplink transmission, the cells operating using Time Division Duplex (TDD) configurations, the method comprising:
receiving a timing offset value from the network node; and
applying a timing offset to the uplink transmission relative to the downlink reception timing, in the cell, when performing at least one Cross-Link Interference (CLI) measurement, the timing offset being based on the timing offset used by the another wireless device in the another cell to adjust the timing of uplink transmission relative to the downlink reception timing, the timing offset being based on at least one or more of:
the propagation delay between the wireless device and the another wireless device:
the propagation delay between the wireless device and the network node;
the propagation delay between the another wireless device and the another network node;
a fixed offset between uplink reception timing and downlink transmission timing at the network node;
a fixed offset between uplink reception timing and downlink transmission timing at the another network node;
a cell radius of the network node; and
a timing advance.
14. The method of claim 13 , wherein the at least one CLI measurement is based one of a Sounding Reference Signal-Reference Signal Received Power (SRS-RSRP) measurement and on a Received Signal Strength Indicator (RSSI) based measurement.
15. The method of claim 14 , wherein signal used for the CLI measurement is transmitted from the another wireless device.
16. The method of claim 13 , wherein wireless device is a victim wireless device and the another wireless device is an aggressor wireless device.