Positioning of terminal devices

1 . An apparatus, comprising:

at least one processor; and at least one memory including computer program code, the at least one memory and computer program code configured to, with the at least one processor, cause the apparatus at least to:

transmit to a transmission-reception point of at least one transmission-reception point a first signal comprising a parameter setting for one or more positioning reference signal transmissions;

transmit to a terminal device a second signal comprising at least the parameter setting;

receive, from the transmission-reception point, a first report comprising at least an occurrence time of a successful transmission of a positioning reference signal from the transmission-reception point;

receive, from the terminal device, a measurement report comprising information on at least the positioning reference signal; and

determine, based on at least the first report and the measurement report, a position of the terminal device,

wherein the at least one memory and computer program code configured to, with the at least one processor, cause the apparatus further at least to:

indicate in the first signal, that a contention based access is to be used for the one or more positioning reference signal transmissions, and a retransmission timeout value for the contention based access; and

indicate in the second signal a length of a time period to listen to at least the one or more positioning reference signal transmissions.

2 . The apparatus of claim 1 , wherein the at least one memory and computer program code configured to, with the at least one processor, cause the apparatus further at least to:

select amongst a plurality of transmission-reception points a set of transmission-reception points;

assign a parameter setting per a selected transmission-reception point in the set of transmission reception points;

transmit, per the selected transmission-reception point, to the selected transmission-reception point, in the first signal the parameter setting assigned as the parameter setting for one or more positioning reference signal transmissions; and

transmit in the second signal, to the terminal device, the parameter settings assigned to the set of selected transmission-reception points.

3 . The apparatus of claim 1 , wherein the at least one memory and computer program code configured to, with the at least one processor, cause the apparatus further at least to:

select amongst a plurality of transmission-reception points a set of transmission-reception points;

transmit, per the selected transmission-reception point, to the selected transmission-reception point, in the first signal, a common resource pool comprising a plurality of parameter settings including the parameter setting; and

transmit in the second signal, to the terminal device, the common resource pool.

4 . The apparatus of claim 1 , wherein the at least one memory and computer program code configured to, with the at least one processor, cause the apparatus further at least to:

determine, based on at least one discovery reference signal configuration received from the at least one transmission-reception point, resource allocation for the one or more positioning reference signal transmissions, wherein a discovery reference signal configuration received indicates a discovery signaling period and wherein the resource allocation at least indicates how many discovery signaling periods a periodicity of the one or more positioning reference signal transmissions is;

transmit in the first signal the resource allocation; and

transmit in the second signal information indicating the resource allocation.

5 . The apparatus of claim 1 , wherein the parameter setting for one or more positioning reference signal transmissions comprises a sequence identifier and/or a frequency pattern of the positioning reference signal and/or a positioning reference pattern in time and/or a periodicity of the positioning reference signal and/or a spatial pattern.

6 . The apparatus of claim 1 ,

wherein the first signal and the first report are signals according to a new radio positioning protocol annex;

wherein the second signal is a signal according to a long term evolution positioning protocol; and

wherein the apparatus is a network entity.

7 . An apparatus, comprising:

at least one processor; and

at least one memory including computer program code, the at least one memory and computer program code configured to, with the at least one processor, cause the apparatus at least to:

receive, from a network entity, a first signal comprising a parameter setting for one or more positioning reference signal transmissions;

transmit at least one positioning reference signal using the parameter setting received; and

transmit to the network entity, in response to a successful transmission of a positioning reference signal, a first report comprising at least an occurrence time of the successful transmission of the positioning reference signal,

wherein the at least one memory and computer program code configured to, with the at least one processor, cause the apparatus further at least to:

use a contention based access to transmit the at least one positioning reference signal; and

repeat, in response to an unsuccessful positioning reference signal transmission, transmitting the at least one positioning reference signal using the parameter setting received until the number of transmissions meets a retransmission timeout value received in the first signal or a transmission succeeds, whichever occurs first.

8 . The apparatus of claim 7 , wherein the at least one memory and computer program code configured to, with the at least one processor, cause the apparatus further at least to:

select the parameter setting for the one or more positioning reference signal transmissions from a common resource pool comprising a plurality of parameter settings, the common resource pool being received in the first signal; and

use the parameter setting selected as the parameter setting received when transmitting the at least one positioning reference signal.

9 . The apparatus of claim 7 , wherein the at least one memory and computer program code configured to, with the at least one processor, cause the apparatus further at least to:

transmit information on a discovery reference signal configuration to the network entity for obtaining scheduling information for the at least one positioning reference signal;

receive in the first signal also information on a resource allocation as the scheduling information; and

transmit the at least one positioning reference signal according to the received resource allocation.

10 . The apparatus of claim 7 , wherein the first signal and the first report are signals according to a new radio positioning protocol annex, and wherein a second signal is a signal according to a long term evolution positioning protocol.

11 . The apparatus of claim 7 , wherein the apparatus is a transmission-reception point.

12 . An apparatus, comprising

at least one processor; and

at least one memory including computer program code, the at least one memory and computer program code configured to, with the at least one processor, cause the apparatus at least to:

receive from a network entity at least a second signal comprising at least one parameter setting for one or more positioning reference signal transmissions from at least one transmission-reception point;

monitor the one or more positioning reference signal transmissions; and

transmit to the network entity a measurement report comprising information on at least one positioning reference signal received by the apparatus from the one or more positioning reference signal transmissions,

wherein the at least one memory and computer program code configured to, with the at least one processor, cause the apparatus further at least to:

use a contention based access to transmit the at least one positioning reference signal; and

repeat, in response to an unsuccessful positioning reference signal transmission, transmitting the at least one positioning reference signal using the parameter setting received until the number of transmissions meets a retransmission timeout value received in the first signal or a transmission succeeds, whichever occurs first.

13 . The apparatus of claim 12 , wherein the at least one memory and computer program code configured to, with the at least one processor, cause the apparatus further at least to:

monitor, in response to the second signal comprising an observation time value, the one or more positioning reference signal transmissions during a time period having a length corresponding to the observation time value.

14 . The apparatus of claim 12 , wherein the at least one memory and computer program code configured to, with the at least one processor, cause the apparatus further at least to:

monitor, in response to a common resource pool comprising a plurality of parameter settings being received in the second signal as the parameter setting for the one or more positioning reference signal transmissions, which of the parameter settings in the common resource pools are detected by receiving, per a detected parameter setting, a corresponding positioning reference signal; and

transmit in the measurement report, as the information on one or more positioning reference signals received by the apparatus, information on one or more detected parameter settings.

15 . The apparatus of claim 12 , wherein the at least one memory and computer program code configured to, with the at least one processor, cause the apparatus further at least to:

receive in the second signal also scheduling information for monitoring; and

perform the monitoring according to the scheduling information.

16 . The apparatus of claim 12 , wherein the second signal is a signal according to a long term evolution positioning protocol.

17 . The apparatus of claim 12 , wherein the parameter setting for one or more positioning reference signal transmissions comprises a sequence identifier and/or a frequency pattern of the positioning reference signal and/or a positioning reference pattern in time and/or a periodicity of the positioning reference signal and/or a spatial pattern.

18 . The apparatus of claim 12 , wherein the apparatus is a terminal device.