Delay processing for a geolocation measurement

1 . A method of transmitting signals used to estimate the position of a user terminal, the method comprising:

transmitting a first signal between a network entity and the user terminal by traveling through a radio unit, the first signal enabling a measurement relating to a transmission travel time between the network entity and the user terminal via the radio unit; and

transmitting a second signal between the network entity and the radio unit, the second signal enabling a measurement of a transmission travel time between the network entity and the radio unit;

wherein at least one value of a transmission condition of the second signal, termed the second value, is dependent on a value of a transmission condition of the first signal, termed the first value,

wherein the second signal is a signal among a set of signals sent by the network entity to the radio unit and which are intended to enable measurement of the transmission travel time between the network entity and the radio unit and wherein the second signal is selected as having the second value that is the most dependent on the first value.

2 . The method according to claim 1 , wherein transmitting the first signal is sending the first signal by the network entity towards the user terminal, and transmitting the second signal is sending the second signal by the network entity towards the radio unit.

3 . The method according to claim 1 , wherein transmitting the first signal is receiving, by the network entity, the first signal originating from the user terminal, and transmitting the second signal is receiving, by the network entity, the second signal originating from the radio unit.

4 . The method according to claim 2 , wherein a delay between sending the first signal and sending the second signal is less than a threshold.

5 . The method according to claim 3 , wherein a delay between receiving the first signal and receiving the second signal is less than a threshold.

6 . A method of transmitting signals used to estimate the position of a user terminal, the method comprising:

transmitting a first signal between a network entity and the user terminal by traveling through a radio unit, the first signal enabling a measurement relating to a transmission travel time between the network entity and the user terminal via the radio unit; and

transmitting a second signal between the network entity and the radio unit, the second signal enabling a measurement of a transmission travel time between the network entity and the radio unit;

wherein at least one value of a transmission condition of the second signal, termed the second value, is dependent on a value of a transmission condition of the first signal, termed the first value,

wherein the network entity periodically sends signals to the radio unit, each of these signals being intended to enable the measurement of a transmission travel time over the portion of the communication network between the network entity and the radio unit, the network entity sending the first signal and the second signal when the measurements of the transmission travel time of the periodically-sent signals are stable.

7 . A method of transmitting signals used to estimate the position of a user terminal, the method comprising:

transmitting a first signal between a network entity and the user terminal by traveling through a radio unit, the first signal enabling a measurement relating to a transmission travel time between the network entity and the user terminal via the radio unit; and

transmitting a second signal between the network entity and the radio unit, the second signal enabling a measurement of a transmission travel time between the network entity and the radio unit;

wherein at least one value of a transmission condition of the second signal, termed the second value, is dependent on a value of a transmission condition of the first signal, termed the first value,

wherein the network entity sends the first signal and wherein the first signal comprises the measurement of the transmission travel time of the second signal over the portion of a communication network between the network entity and the radio unit.

8 . The method according to claim 1 , further comprising sending, by the network entity and towards a geolocation server, a message comprising information relating to a transmission travel time of the second signal between the network entity and the radio unit.

9 . A method of transmitting signals used to estimate the position of a user terminal, the method comprising:

transmitting a first signal between a network entity and the user terminal by traveling through a radio unit, the first signal enabling a measurement relating to a transmission travel time between the network entity and the user terminal via the radio unit; and

transmitting a second signal between the network entity and the radio unit, the second signal enabling a measurement of a transmission travel time between the network entity and the radio unit;

wherein at least one value of a transmission condition of the second signal, termed the second value, is dependent on a value of a transmission condition of the first signal, termed the first value,

wherein a portion of the communication network between the network entity and the radio unit comprises a transport network device, and wherein the transport network device participates in the transmission of the first signal and second signal by applying, for each of these transmissions, a same value of a transmission parameter and/or a same routing and/or dedicated resources,

the method further comprising sending a message by the network entity towards the transport network device, the message comprising an item of information among a transmission parameter value to be applied, a time period during which the value of the transmission parameter is to be applied to signals originating from or intended for the network entity, information which allows identifying the first and second signal, and resources used for the transmission of the first and second signal.

10 . The method according to claim 9 , wherein the transmission parameter is a priority level.

11 . A non-transitory computer-readable storage medium having stored thereon a computer program comprising instructions for causing a processor to implement the method according to claim 1 .