Frequency hop based positioning measurement
Positioning reference signals are transmitted in a downlink direction from base stations ( 200 ) of a wireless communication network to a wireless communication device ( 100 ) or in an uplink direction from the wireless communication device ( 100 ) to base stations ( 200 ) of the wireless communication network. According to a frequency hop pattern, a radio interface of the wireless communication device is switched between multiple different frequency ranges. In this way, the wireless communication device ( 100 ) can receive the downlink positioning reference signals on multiple different frequencies defined by the frequency hop pattern or send the uplink positioning reference signals on multiple different frequencies defined by the frequency hop pattern.
1. A method of enabling position measurement for a wireless communication device, the method comprising:
configuring a frequency hop pattern to be applied for switching a radio interface of the wireless communication device between multiple different frequency ranges to send uplink positioning reference signals on multiple different frequencies defined by the frequency hop pattern;
receiving, by a base station of a wireless communications network, the uplink positioning reference signals from the wireless communication device;
configuring further base stations of the wireless communications network to receive the uplink positioning references signals from the wireless communications device and to provide information derived from received uplink positioning reference signals to the base station; and
by combined evaluation of received uplink positioning reference signals and the information provided by the further base stations, determining positioning information for the wireless communication device.
2. The method according to claim 1 ,
wherein the wireless communication device configures the frequency hop pattern on the basis of configuration information received from the wireless communication network.
3. The method according to claim 1 ,
wherein the base station sends configuration information indicating the frequency hop pattern to the wireless communication device.
4. The method according to claim 1 ,
wherein the base station sends configuration information indicating the frequency hop pattern to the further base stations.
5. The method according to claim 1 ,
wherein the frequency hop pattern defines a first frequency hop distance which is smaller than the maximum bandwidth supported by the radio interface and a second frequency hop distance which is larger than the maximum bandwidth supported by the radio interface.
6. The method according to claim 1 ,
wherein the frequency hop pattern further defines a repetition pattern of the uplink positioning reference signals.
7. The method according to claim 1 ,
wherein the uplink positioning reference signals are multiplexed on the basis of a frequency multiplexing scheme.
8. The method according to claim 7 ,
wherein a frequency granularity for frequency division multiplexing of the uplink positioning reference signals is finer than a frequency granularity for frequency division multiplexing of wireless communication signals transmitted between the wireless communication device and the wireless communication network.
9. The method according to claim 7 ,
wherein the multiplexing scheme comprises one or more of frequency division multiplexing, time division multiplexing, and code division multiplexing.
10. The method according to claim 7 ,
wherein the uplink positioning reference signals and further uplink positioning reference signals transmitted by one or more other wireless communication devices are multiplexed on the basis of a multiplexing scheme comprising one or more of frequency division multiplexing, time division multiplexing, and code division multiplexing.
11. The method according to claim 10 ,
wherein a frequency granularity for frequency division multiplexing of the uplink positioning reference signals and the further uplink positioning reference signals transmitted by further wireless communication devices is finer than a frequency granularity for frequency division multiplexing of wireless communication signals transmitted between the wireless communication device and the wireless communication network.
12. The method according to claim 1 , further comprising:
according to the frequency hop pattern, the wireless communication device switching the radio interface of the wireless communication device between the multiple different frequency ranges to send the uplink positioning reference signals on the multiple different frequencies defined by the frequency hop pattern.
13. The method according to claim 1 ,
wherein the positioning information comprises a time-difference of arrival of the uplink positioning reference signals at multiple different base stations.
14. The method according to claim 1 , wherein at least some of the multiple different frequencies are separated by more than a maximum bandwidth supported by the radio interface of the wireless communication device.
15. A wireless communication device, comprising:
a radio interface for connecting to a wireless communication network; and
at least one processor,
the at least one processor being configured to:
configure a frequency hop pattern applied to the radio interface of the wireless communication device, wherein, based on the frequency hop pattern, the radio interface is controlled to switch between multiple different frequency ranges to send uplink positioning reference signals on the multiple different frequencies defined by the frequency hop pattern,
wherein at least some of the multiple different frequencies are separated by more than a maximum bandwidth supported by the radio interface of the wireless communication device.
16. A base station for a wireless communication network, the base station comprising:
a radio interface for connecting to a wireless communication device;
a network interface for connecting to further base stations of the wireless communication network; and
at least one processor,
the at least one processor being configured to:
configure a frequency hop pattern for the radio interface, wherein, based on the frequency hop pattern, the radio interface is controlled between multiple different frequency ranges to receive uplink positioning reference signals communicated by the wireless communication device on the multiple different frequencies defined by the frequency hop pattern.
17. A system, comprising:
a base station according to claim 16 ; and
the wireless communication device.
18. The base station according to claim 16 , wherein the at least one processor is further configured to:
receive the uplink positioning reference signals from the wireless communication device;
configure further base stations of the wireless communication network to receive the uplink positioning reference signals from the wireless communication device and provide information derived from the received uplink positioning reference signals to the base station; and
by combined evaluation of the received uplink positioning reference signals and the information provided by the further base stations, determine positioning information for the wireless communication device.
19. The method according to claim 18 ,
wherein the positioning information comprises a time-difference of arrival of the uplink positioning reference signals at multiple different base stations.
20. The base station according to claim 16 , wherein at least some of the multiple different frequencies are separated by more than a maximum bandwidth supported by the radio interface of the wireless communication device.