US Patent No. 10,117,213


Patent No. 10,117,213
Issue Date October 30, 2018
Title Multiple Carrier Attachment Establishment And Maintenance
Inventorship Scott Bartlett, Oakland, CA (US)
Assignee Google LLC, Mountain View, CA (US)

Claim of US Patent No. 10,117,213

1. A method, executed by a mobile station (MS) attached to a first wireless wide area network (WWAN), for attaching to a second WWAN while maintaining the attachment to the first WWAN, the method comprising:prior to a handover request by the MS, transmitting, via a physical uplink channel with a radio access network (RAN) of the first WWAN, an attach request message addressed to a generic access network controller of a generic access network (GAN) of the second WWAN via a third separate network;
receiving, via a physical downlink channel with the RAN of the first WWAN, an attach accept message from the generic access network controller of the GAN of the second WWAN via the third separate network, the attach accept message including a packet data network (PDN) address; and
storing, at a computer readable storage medium, an association relationship between an identifier of a subscription with the second WWAN and the PDN address.