Method and/or system for positioning from a reference signal
Techniques are provided that provide for or otherwise support positioning and related services for mobile devices via wireless signals. In an example, a mobile device in a communication network may acquire a first downlink signal from a first node in the communication network and a second downlink signal from a second node in the communication network. The first node may also be configured to transmit a data service signal and/or a voice service signal via the first downlink signal. However, the second node, by design, is not configured to transmit either a voice service signal or a data service signal via the second downlink signal. An estimated location of the mobile device may subsequently be determined, for example, based, at least in part, on the first and second terrestrial positioning signals.
1. A method comprising, at a mobile device in a communication network:
acquiring a first downlink signal from a first node in the communication network, wherein the first node is configured to transmit a first terrestrial positioning signal, in addition to a data service signal or a voice service signal, or some combination thereof via the first downlink signal;
acquiring a second downlink signal from a second node in the communication network, wherein the second node is configured to transmit a second terrestrial positioning signal via the second downlink signal, and wherein the second node is incapable of transmitting either a voice service signal or a data service signal via the second downlink signal; and
obtaining an estimated location of the mobile device determined based, at least in part, on locations of the first node and the second node, and the first terrestrial positioning signal and the second terrestrial positioning signal.
2. The method of claim 1 , and further comprising inhibiting the mobile device from camping on the second node for a voice service or a data service.
3. The method of claim 2 , and further comprising:
receiving a message comprising an indication that the second node is unavailable for camping on by the mobile device; and
wherein inhibiting the mobile device from camping on the second node for the voice service or the data service further comprises inhibiting the mobile device from initiating camping on the second node in response to the indication.
4. The method of claim 2 , and further comprising:
receiving a message comprising a Closed Subscriber Group indicator; and
wherein inhibiting the mobile device from camping on the second node further comprises inhibiting the mobile device from initiating camping on the second node in response to the Closed Subscriber Group indicator.
5. The method of claim 2 , wherein inhibiting the mobile device from camping on the second node further comprises inhibiting the mobile device from initiating camping on the second node in response to an absence of a Cell-specific reference signal, a primary synchronization signal or secondary synchronization signal, or any combination having been received from the second node.
6. The method of claim 1 , wherein the first terrestrial positioning signal is transmitted with a first duty cycle in the first downlink signal of less than or equal to a threshold value, and wherein the second terrestrial positioning signal is transmitted with a second duty cycle in the second downlink signal greater than the threshold value.
7. The method of claim 6 , wherein the threshold value is 3.75 percent.
8. The method of claim 1 , wherein the second terrestrial positioning signal is transmitted in the second downlink signal on a single frequency channel.
9. A mobile device comprising:
a wireless transceiver device; and
one or more processors to:
process a first downlink signal acquired at the wireless transceiver device and transmitted from a first node in a communication network configured to transmit a first terrestrial positioning signal in addition to a data service signal or a voice service signal, or some combination thereof via the first downlink signal;
process a second downlink signal acquired at the wireless transceiver device from a second node in the communication network, wherein the second node is configured to transmit a second terrestrial positioning signal via the second downlink signal, and wherein the second node is incapable of transmitting either a voice service signal or a data service signal via the second downlink signal; and
obtain an estimated location of the mobile device determined based, at least in part, on locations of the first node and the second node, and the first terrestrial positioning signal and the second terrestrial positioning signal.
10. The mobile device of claim 9 , wherein the one or more processors are further to inhibit the mobile device from camping on the second node for a voice service or a data service.
11. The mobile device of claim 10 , wherein the one or more processors are to inhibit the mobile device from camping on the second node for voice or data service in response to detection of a restrictor indicator in a message received by the wireless transceiver device.
12. The mobile device of claim 10 , and wherein the one or more processors are to inhibit the mobile device from camping on the second node for voice or data service in response to a Closed Subscriber Group indicator in a message received at the wireless transceiver device.
13. The mobile device of claim 10 , and wherein the one or more processors are further to inhibit the mobile device from camping on the second node for voice or data service in response to an absence of a Cell-specific reference signal, a primary synchronization signal or secondary synchronization signal, or any combination thereof having been received from the second node.
14. The mobile device of claim 9 , wherein the first terrestrial positioning signal is transmitted with a first duty cycle in the first downlink signal of less than or equal to a threshold value, and wherein the second terrestrial positioning signal is transmitted with a second duty cycle in the second downlink signal greater than the threshold value.
15. The mobile device of claim 14 , wherein the threshold value is 3.75 percent.
16. The mobile device of claim 9 , wherein the second terrestrial positioning signal is transmitted in the second downlink signal on a single frequency channel.
17. A non-transitory storage medium comprising machine-readable instructions stored thereon which are executable by one or more processors of a mobile device to:
process a first downlink signal acquired from a first node in a communication network, wherein the first node is configured to transmit a first terrestrial positioning signal in addition to a data service signal or a voice service signal, or some combination thereof via the first downlink signal;
process a second downlink signal acquired from a second node in the communication network, wherein the second node is configured to transmit a second terrestrial positioning signal via the second downlink signal, and wherein the second node is incapable of transmitting either a voice service signal or a data service signal via the second downlink signal; and
obtain an estimated location of the mobile device determined based, at least in part, on locations of the first node and the second node, and the first terrestrial positioning signal and the second terrestrial positioning signal.
18. The non-transitory storage medium of claim 17 , wherein said machine-readable instructions are further executable by said one or more processors to:
inhibit the mobile device from camping on the second node for a voice service or a data service.
19. The non-transitory storage medium of claim 18 , wherein said machine-readable instructions are further executable by said one or more processors to:
inhibit the mobile device from camping on the second node for the voice service or the data service in response to an indicator in a message received by the mobile device.
20. The non-transitory storage medium of claim 19 , wherein said machine-readable instructions are further executable by said one or more processors to:
inhibit the mobile device from camping on the second node for the voice service or the data service in response to an absence of a Cell-specific reference signal, a primary synchronization signal or secondary synchronization signal, or any combination having been received from the second node.
21. The non-transitory storage medium of claim 19 , wherein the first terrestrial positioning signal is transmitted with a first duty cycle in the first downlink signal of at less than or equal to a threshold value, and wherein the second terrestrial positioning signal is transmitted with a second duty cycle in the second downlink signal greater than the threshold value.
22. The non-transitory storage medium of claim 21 , wherein the threshold value is 3.75 percent.
23. The non-transitory storage medium of claim 18 , wherein said machine-readable instructions are further executable by said one or more processors to:
inhibit the mobile device from camping on the second node for the voice service or the data service in response to a Closed Subscriber Group indicator in a message received by the mobile device.
24. A mobile device comprising:
means for acquiring a first downlink signal from a first node in a communication network, wherein the first node is configured to transmit a first terrestrial positioning signal in addition to a data service signal or a voice service signal, or some combination thereof via the first downlink signal;
means for acquiring a second downlink signal from a second node in the communication network, wherein the second node is configured to transmit a second terrestrial positioning signal via the second downlink signal, and wherein the second node is incapable of transmitting either a voice service signal or a data service signal via the second downlink signal; and
means for obtaining an estimated location of the mobile device determined based, at least in part, on locations of the first node and the second node, and the first terrestrial positioning signal and the second terrestrial positioning signal.
25. The mobile device of claim 24 , and further comprising means for inhibiting the mobile device from camping on the second node for a voice service or a data service.
26. The mobile device of claim 25 , wherein said means for inhibiting the mobile device from camping on the second node for voice or data service further comprises means for inhibiting the mobile device from camping on the second node for voice or data service in response to detection of an indication in a message received by the mobile device.
27. The mobile device of claim 25 , wherein said means for inhibiting the mobile device from camping on the second node further comprises means for inhibiting the mobile device from camping on the second node for voice or data service in response to a Closed Subscriber Group indicator in a message received at the mobile device.
28. The mobile device of claim 25 , wherein said means for inhibiting the mobile device from camping on the second node further comprises means for inhibiting the mobile device from camping on the second node for voice or data service in response to an absence of a Cell-specific reference signal, a primary synchronization signal or secondary synchronization signal, or any combination thereof having been received from the second node.
29. The mobile device of claim 24 , wherein the second terrestrial positioning signal is transmitted in the second downlink signal on a single frequency channel.