Efficient transition between a trusted WLAN and a WWAN
First Claim
1. A method of wireless communication at a user equipment (UE) comprising:
- establishing a user-plane-traffic-free connection, wherein the user-plane-traffic-free connection terminates at a wireless wide area network (WWAN) network entity, and wherein a high level operating system (HLOS) of the UE is unaware of the user-plane-traffic-free connection;
establishing a first packet data network (PDN) connection with the WWAN;
establishing a connection with a wireless local area network (WLAN);
determining the WLAN is a trusted WLAN based at least in part on the established connection with the WLAN;
disconnecting the first PDN connection based at least in part on determining the WLAN is a trusted WLAN;
maintaining the user-plane-traffic-free connection with the WWAN while connected to the WLAN;
determining that the connection with the WLAN is unavailable; and
responsive to determining that the connection with the WLAN is unavailable, establishing a second PDN connection with the WWAN based at least in part on the user-plane-traffic-free connection, wherein establishing the second PDN connection with the WWAN comprises refraining from performing an attachment procedure with the WWAN based at least in part on the maintained user-plane-traffic-free connection.
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Accused Products
Abstract
Methods, systems, and devices for wireless communication are described. A user equipment (UE) may prevent rejected attachment requests when connecting to a trusted wireless local area network (WLAN) and from a wireless wide area network (WWAN). For example, an attachment packet data network (PDN) connection may be maintained with the WWAN while connected to the trusted WLAN. In some cases, the connection used to maintain the attachment may be an internet protocol (IP) multimedia subsystem (IMS) connection. Alternatively, the UE may determine that the WLAN connection is a trusted connection and deactivate the WWAN connection. Should the WLAN become unavailable the UE may reactivate the connection with the WWAN.
14 Citations
17 Claims
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1. A method of wireless communication at a user equipment (UE) comprising:
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establishing a user-plane-traffic-free connection, wherein the user-plane-traffic-free connection terminates at a wireless wide area network (WWAN) network entity, and wherein a high level operating system (HLOS) of the UE is unaware of the user-plane-traffic-free connection; establishing a first packet data network (PDN) connection with the WWAN; establishing a connection with a wireless local area network (WLAN); determining the WLAN is a trusted WLAN based at least in part on the established connection with the WLAN; disconnecting the first PDN connection based at least in part on determining the WLAN is a trusted WLAN; maintaining the user-plane-traffic-free connection with the WWAN while connected to the WLAN; determining that the connection with the WLAN is unavailable; and responsive to determining that the connection with the WLAN is unavailable, establishing a second PDN connection with the WWAN based at least in part on the user-plane-traffic-free connection, wherein establishing the second PDN connection with the WWAN comprises refraining from performing an attachment procedure with the WWAN based at least in part on the maintained user-plane-traffic-free connection. - View Dependent Claims (2, 3, 4, 5, 6)
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7. An apparatus for wireless communication at a user equipment (UE) comprising:
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means for establishing a user-plane-traffic-free connection, wherein the user-plane-traffic-free connection terminates at a wireless wide area network (WWAN) network entity, and wherein a high level operating system (HLOS) of the UE is unaware of the user-plane-traffic-free connection; means for establishing a first packet data network (PDN) connection with the WWAN; means for establishing a connection with a wireless local area network (WLAN); means for determining the WLAN is a trusted WLAN based at least in part on the established connection with the WLAN; means for disconnecting the first PDN connection based at least in part on determining the WLAN is a trusted WLAN; means for maintaining the user-plane-traffic-free connection with the WWAN while connected to the WLAN; means for determining that the connection with the WLAN is unavailable; and means for establishing, responsive to determining that the connection with the WLAN is unavailable, a second PDN connection with the WWAN based at least in part on the user-plane-traffic-free connection, wherein establishing the second PDN connection with the WWAN refrains from performing an attachment procedure with the WWAN based at least in part on the maintained user-plane-traffic-free connection.
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8. An apparatus for wireless communication at a user equipment (UE), comprising:
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a processor; memory in electronic communication with the processor; and instructions stored in the memory and operable, when executed by the processor, to cause the apparatus to; establish a user-plane-traffic-free connection, wherein the user-plane-traffic-free connection terminates at a wireless wide area network (WWAN) network entity, and wherein a high level operating system (HLOS) of the UE is unaware of the user-plane-traffic-free connection; establish a first packet data network (PDN) connection with the WWAN; establish a connection with a wireless local area network (WLAN); determine the WLAN is a trusted WLAN based at least in part on the established connection with the WLAN; disconnect the first PDN connection based at least in part on determining the WLAN is a trusted WLAN; maintain the user-plane-traffic-free connection with the WWAN while connected to the WLAN; determine that the connection with the WLAN is unavailable; and responsive to determining that the connection with the WLAN is unavailable, establish a second PDN connection with the WWAN based at least in part on the user-plane-traffic-free connection, wherein establishing the second PDN connection with the WWAN comprises refraining from performing an attachment procedure with the WWAN based at least in part on the maintained user-plane-traffic-free connection. - View Dependent Claims (9, 10, 11, 12)
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13. A non-transitory computer-readable medium storing code for wireless communication at a user equipment (UE), the code comprising instructions executable to:
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establish a user-plane-traffic-free connection, wherein the user-plane-traffic-free connection terminates at a wireless wide area network (WWAN) network entity, and wherein a high level operating system (HLOS) of the UE is unaware of the user-plane-traffic-free connection; establish a first packet data network (PDN) connection with the WWAN; establish a connection with a wireless local area network (WLAN); determine the WLAN is a trusted WLAN based at least in part on the established connection with the WLAN; disconnect the first PDN connection based at least in part on determining the WLAN is a trusted WLAN; maintain the user-plane-traffic-free connection with the WWAN while connected to the WLAN; determine that the connection with the WLAN is unavailable; and responsive to determining that the connection with the WLAN is unavailable, establish a second PDN connection with the WWAN based at least in part on the user-plane-traffic-free connection, wherein establishing the second PDN connection with the WWAN comprises refraining from performing an attachment procedure with the WWAN based at least in part on the maintained user-plane-traffic-free connection. - View Dependent Claims (14, 15, 16, 17)
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Specification