Mobile terminated packet data call setup without dormancy
AssigneeQUALCOMM Incorporated
InventorSivaramakrishna Veerepalli
Life of this patent
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Abstract
When the binding of a mobile station (MS) in a home agent (HA) expires, the HA generates an identifier from the MS's IMSI. The HA maintains a binding between the home address (HoA) and a special care of address (MAP-CoA), where the host ID of MAP-CoA is the identifier, and where the network ID of MAP-CoA is a special code. When a packet destined for the HoA is received at the HA, the HA responds by communicating the MAP-CoA to the PDSN that serves the special code. The PDSN recovers the IMSI from the host ID of the MAP-CoA, and uses the IMSI to page the MS. The MS responds by setting up a call, obtaining a new care of address, and then binding the new care of address with its HoA in the HA. Advantageously, packets can be sent to a dormant MS at its HoA without out-of-band signaling.
Claims30
A method comprising:
- maintaining a binding in a home agent of a mobile IP system for a mobile station (MS) when a first binding between a home address of the MS and a first care of address (CoA) of the MS expires, the binding being between the home address of the mobile station and a second CoA of the mobile station, wherein the second CoA comprises a network ID portion and a host ID portion, wherein the network ID portion comprises a special code operable to identify a packet data serving node (PDSN) corresponding to the first CoA and further operable to cause the PDSN, upon detecting the special code, to page the mobile station with a request to set up an IP communication, wherein the host ID portion being usable to derive an identification number of the MS.
A system for maintaining communication with a roaming mobile station (MS), the system comprising:
- a home agent (HA) that maintains a binding for the MS when a first binding between a home address of the MS and a first care of address (CoA) of the MS expires, the binding including a second CoA, the second CoA including a first portion and a second portion, the first portion comprising a special code operable to identify a packet data serving node (PDSN) corresponding to the first CoA and further operable to cause the PDSN, upon detecting the special code, to page the mobile station with a request to set up an IP communication, the second portion being usable to derive an identification number of the MS;
- and
- the PDSN operable to receive a data packet from the HA having as a destination the second CoA and, based on detecting the special code, further operable to derive the identification number from the second portion and, further based on detecting the special code, operable to cause the MS to be paged using the identification number.
A mobile IP system, comprising:
- means for generating a binding for a mobile station (MS) when a first binding between a home address of the MS and a first care of address (CoA) of the MS expires, where the binding is between the home address of the MS and a second CoA of the MS, wherein the second CoA includes a first portion and a second portion, wherein the first portion comprises a special code operable to identify a packet data serving node (PDSN) corresponding to the first CoA and further operable to cause the PDSN, upon detecting the special code, to page the mobile station with a request to set up an IP communication, wherein the second portion is derived from an International Mobile Subscriber Identity (IMSI);
- and
- a data storage mechanism that stores the binding.
A computer-readable medium having computer-executable instructions stored thereon, comprising:
- instructions for causing a computer to maintain a binding in a home agent of a mobile IP system for a mobile station (MS) when a first binding between a home address of the MS and a first care of address (CoA) of the MS expires, the binding being between the home address of the mobile station and a second CoA of the mobile station, wherein the second CoA comprises a network ID portion and a host ID portion, wherein the network ID portion comprises a special code operable to identify a packet data serving node (PDSN) corresponding to the first CoA and further operable to cause the PDSN, upon detecting the special code, to page the mobile station with a request to set UD an IP communication, wherein the host ID portion being usable to derive an identification number of the MS.
Dependencies are inferred from the claim text.