Apparatus, system and method for improving position estimation and/or communication performance in a wireless communication network
An apparatus includes an antenna and a transceiver. The transceiver transmits a first signal via the antenna, the first signal including a unique identification of the apparatus and a request for receive information about the first signal at a receiver. The transceiver receives from the receiver a second signal via the antenna, the second signal including first information about a direction of arrival (DoA) of the first signal at the receiver and second information indicative of a location of the receiver.
1. A mobile device for a wireless communication network, the mobile device comprising
an antenna; and
a transceiver,
wherein the transceiver is configured to
transmit a first signal via the antenna, the first signal comprising a unique identification of the mobile device and a request to transmit to the mobile device information for estimating a position of the mobile device, and
following the transmission of the first signal, receive a second signal via the antenna, the second signal comprising the information for estimating a position of the mobile device, the information for estimating a position of the mobile device comprising a first information about a spatial direction of a position reference signal (PRS) sent out by a base station of the wireless communication network and a second information indicative of a location of the base station, and
wherein the signal processor is configured to estimate a position of the mobile device using the spatial direction of the position reference signal (PRS) and the location information included in the second signal.
2. The mobile device according to claim 1 , wherein the spatial direction comprises an horizontal angle and a vertical angle, or a direction vector comprising one or more components of a coordinate system in which the mobile device and the base station are located.
3. The mobile device according to claim 1 , wherein the second information comprises data corresponding to a position of the base station or an identification of the base station.
4. The mobile device according to claim 1 , wherein the first signal is defined in accordance with a communication protocol/standard, and comprises a random-based generated sequence, which is unique for the mobile device, or a fixed sequence, which is unique for the mobile device.
5. The mobile device according to claim 1 , wherein the second signal is a beamformed signal.
6. The mobile device according to claim 1 , wherein the second signal is correlated with the unique identification of the mobile device such that only an intended mobile device is able to restore the first and second information.
7. The mobile device according to claim 1 , wherein
the transceiver is configured to receive from at least one further base station of the wireless communication network a further second signal via the antenna, the further second signal comprising first information about a spatial direction of a further transmitted downlink signal, like a position reference signal (PRS), sent out by the further base station and second information indicative of a location of the further base station, and
a signal processing unit is provided, the signal processing unit configured to estimate a position of the mobile device using the first and second information in the second signal received from the base station and in the further second signal received from the at least one further base station.
8. The mobile device according to claim 1 , wherein
a signal processing unit is provided, the signal processing unit configured to calculate time of arrival (ToA) estimates for the second signal using the position reference signals, to determine a distance from the receiver using the ToA estimates, and to estimate the position of the mobile device.
9. The mobile device according to claim 1 , wherein
a signal processing unit is provided, the signal processing unit configured to determine a received power of the second signal, like a received signal strength indicator (RSSI), a Signal-to-Noise ratio (SNR), or other metrics, to determine a distance from the receiver using the received power, and to estimate the position of the mobile device.
10. The mobile device according to claim 1 , wherein
a signal processing unit is provided, the signal processing unit configured to estimate a direction of a main lobe of the second signal using the first and second information in the second signal received from the receiver.
11. A base station for a wireless communication network, the base station comprising
a plurality of antennas; and
a transceiver,
wherein the transceiver is configured to
receive from a mobile device of the wireless communication network a first signal via the plurality of antennas, the first signal comprising a unique identification of the mobile device and a request to transmit to the mobile device information for estimating a position of the mobile device, and
following the receipt of the first signal, transmit to the mobile device a second signal via the plurality of antennas, the second signal comprising the information for estimating a position of the mobile device, the information for estimating a position of the mobile device comprising a first information about a position reference signal (PRS) sent out by the base station and a second information indicative of a location of the base station, and
wherein the signal processor is configured to estimate a position of the mobile device using the spatial direction of the position reference signal (PRS) and the location information included in the second signal.
12. The base station according to claim 11 , wherein the spatial direction comprises an horizontal angle and a vertical angle, or a direction vector comprising one or more of a coordinate system in which the base station and the mobile device are located.
13. The base station according to claim 11 , wherein the second information comprises data corresponding to a position of the base station or an identification of the base station.
14. The base station according to claim 11 , wherein the first signal is defined in accordance with a communication protocol/standard, and comprises a random-based generated sequence, which is unique for the mobile device, or a fixed sequence, which is unique for the mobile device.
15. The base station according to claim 11 , wherein the transceiver is configured to provide the second signal as a beamformed signal using the plurality of antennas.
16. The base station according to claim 11 , wherein the second signal is correlated with the unique identification of the mobile device such that only an intended mobile device is able to restore the first and second information.
17. The base station according to claim 11 , wherein the transceiver is configured to
transmit the second signal multiple times using the same beam, and/or
transmit the second signal using multiple beams at the same time and frequency, and/or
transmit the second signal using multiple beams on orthogonal resources, like time, frequency or code domain resources.
18. A wireless communication network, comprising:
at least one mobile device, and
at least one base station,
wherein the at least one mobile device comprises:
an antenna; and
a transceiver,
wherein the transceiver is configured to
transmit a first signal via the antenna, the first signal comprising a unique identification of the least one mobile device and a request to transmit to the mobile device information for estimating a position of the least one mobile device, and
following the transmission of the first signal, receive a second signal via the antenna, the second signal comprising the information for estimating a position of the mobile device, the information for estimating a position of the mobile device comprising a first information about a position reference signal (PRS) sent out by the at least one base station and a second information indicative of a location of the at least one base station, and
wherein the signal processor is configured to estimate a position of the mobile device using the spatial direction of the position reference signal (PRS) and the location information included in the second signal.
19. The wireless communication network of claim 18 , wherein the at least one base station comprises:
a plurality of antennas; and
a transceiver,
wherein the transceiver is configured to
receive from the at least one mobile device the first signal via the plurality of antennas, the first signal comprising the unique identification of the at least one mobile device and the request to transmit to the mobile device the information for estimating a position of the mobile device, and
following the receipt of the first signal, transmit to the at least one mobile device the second signal via the plurality of antennas, the second signal comprising the first information about the spatial direction of the transmitted downlink signal, like a position reference signal (PRS), sent out by the base station and second information indicative of a location of the at least one base station.