| 摘要 |
Embodiments are described that may help to provide wireless service in a circuit-switched fall back scenario. In particular, when a user entity (UE) falls back from a first network to a second network to conduct a voice call, the first network may instruct the UE to scan a certain predetermined channel or channels for coverage from the second network. However, certain types of base stations typically operate on unlisted channels that differ from the predetermined channels that the UE is instructed to scan. Accordingly, a UE may pre-emptively scan unlisted channels, and report any unlisted channel that is detected to the first network. The first network can then coordinate with the second network to re-provision the base station that was operating on an unlisted channel, to instead operate on one of the predetermined channels that a UE will be instructed to scan during fall back to the second network. |
| 主权项 |
1. A computer-implemented method comprising:
receiving, at a user entity (UE) that is configured to communicate with a first access network under a first protocol and to communicate with a second access network under a second protocol, a message from the first access network that indicates to scan one or more channels of the second access network that are identified in a predetermined channel list, wherein the UE is further configured for circuit-switched fallback (CSFB) from the first access network to the second access network; before scanning the one or more channels of the second access network that are identified in a predetermined channel list, performing a scan to detect one or more channels that are available for communication under the second protocol, wherein at least a first channel that is available for communication under the second protocol is detected during the scan, and wherein performing the scan to detect one or more channels that are available for communication under the second protocol comprises scanning one or more unlisted channels that are not included on the predetermined channel list; determining, by the UE, that the first channel is an unlisted channel that is not included on the predetermined channel list, wherein a first base station in the second access network operates on the first channel, wherein the first base station is a femtocell; responsive to determining that the first channel is unlisted, the UE sending, to the first access network, a message that identifies the first channel of the second access network, wherein the message that identifies the first channel of the second access network facilitates temporary re-provisioning of the femtocell such that at least one channel operated by the femtocell is detectable for addition to the predetermined channel list; and after sending the message that identifies the first channel of the second access network, receiving a message from the first access network that comprises an updated predetermined channel list, wherein the updated predetermined channel list comprises at least one channel operated by the femtocell. |
