Smooth handoff via state exchange in wireless networks
AssigneeUTStarcom, Inc.
InventorsAbhishek Sharma, Michael S. Borella
Life of this patent
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Abstract
A system and method for providing a handoff of a call from a mobile node. The call has associated state information. The call is established between the mobile node and a first RNN and the mobile node and a first PDSN. Thereafter, the mobile node roams and establishes a link between the mobile node and a second RNN. A second PDSN is selected to service the mobile node. A direct communication path is established between the first PDSN and the second PDSN. State information of the call is exchanged between the first PDSN and the second PDSN using the communication path.
Claims29
A method of establishing a call with a mobile node, the call having associated PPP state information, the method comprising:
- establishing a communication path between a first network device and a second network device, the first network device initially retaining the PPP state information and wherein the PPP state information comprises ACCM information, a LCP negotiated options list, an IP address, an AAA profile, a RADIUS profile, compression parameters, a compression dictionary, and header compression parameters;
- and
- transferring the PPP state information from the first network device to the second network device.
A system for maintaining a communication link with a mobile node comprising:
- a first network device, the first network device maintaining a call with the mobile node, the call including PPP state information and wherein the PPP state information is comprises from ACCM information, a LCP negotiated options list, an IP address, an AAA profile, a RADIUS profile, compression parameters, a compression dictionary, and header compression parameters;
- and
- a second network device coupled to the first network device, the first network device transferring the state information to the second network device upon a predetermined condition.
A method for providing a handoff of a call from a mobile node, the call having associated state information, the method comprising:
- establishing the call between the mobile node and a first RNN and the mobile node and a first PDSN;
- thereafter, roaming the mobile node and establishing a link between the mobile node and a second RNN;
- selecting a second PDSN to service the mobile node;
- establishing a direct communication path between the first PDSN and the second PDSN;
- and
- exchanging the state information of the call between the first PDSN and the second PDSN using the communication path and wherein the state information is comprises ACCM information, a LCP negotiated options list, an IP address, an AAA profile, a RADIUS profile, compression parameters, a compression dictionary, and header compression parameters.
A method of call handoff for a mobile node with a call, the call having associated state information, the method comprising:
- establishing a simple IP (SIP) session between the mobile node and a first PDSN;
- roaming the mobile node and establishing a link with a second RNN
- selecting a second PDSN to service the mobile node;
- sending a request to the second PDSN from the second RNN;
- and
- exchanging the state information of the call between the first PDSN and the second PDSN and wherein the state information is comprises from ACCM information a LCP negotiated options list, an IP address, an AAA profile, a RADIUS profile, compression parameters, a compression dictionary, and header compression parameters.
A system for providing call handoffs with a mobile node, the mobile node having a call, the call having associated state information, the system comprising
- a mobile node, the mobile node being in a first coverage area;
- a first RNN being coupled to a first PDSN, the first RNN being initially communicatively coupled to the mobile node;
- a second PDSN;
- a second RNN having a second coverage area;
- wherein the mobile node roams from the first coverage area to the second coverage area, and a link is established with the second RNN;
- and
- wherein state information is exchanged between the first PDSN and the second PDSN and wherein the state information is comprises ACCM information, a LCP negotiated options list, an IP address, an AAA profile, a RADIUS profile, compression parameters, a compression dictionary, and header compression parameters.
A system for providing call handoffs with a mobile node, the system comprising:
- a mobile node;
- a first RNN being coupled to a first PDSN, the first RNN being initially communicatively coupled to the mobile node, the first RNN having a first coverage area;
- a second PDSN;
- a second RNN having a second coverage area;
- a FACN communicatively coupled to the first PDSN and the second PDSN;
- wherein the mobile node roams away from the first coverage area to the second coverage area, and a link is established with the second RNN;
- and
- wherein state information is exchanged between the first PDSN and the FACN and the FACN and the second PDSN and wherein the state information is comprises ACCM information, a LCP negotiated options list, an IP address, an AAA profile, a RADIUS profile, compression parameters, a compression dictionary, and header compression parameters.
A system for providing a handoff of a call from a mobile node, the call having associated state information, the system comprising:
- means for establishing the call between the mobile node and a first RNN and the mobile node and a first PDSN;
- means for roaming the mobile node and establishing a link between the mobile node and a second RNN;
- means for selecting a second PDSN to service the mobile node;
- means for establishing a direct communication path between the first PDSN and the second PDSN;
- and
- means for exchanging the state information of the call between the first PDSN and the second PDSN using the communication path and wherein the state information is comprises ACCM information, a LCP negotiated options list, an IP address, an AAA profile, a RADIUS profile, compression parameters, a compression dictionary, and header compression parameters.
A system of call handoff for a mobile node with a call, the call having associated state information, the system comprising:
- means for establishing a SIP session between the mobile node and a first PDSN;
- means for roaming the mobile node and establishing a link with a second RNN
- means for selecting a second PDSN to service the mobile node;
- means for sending a request to the second PDSN from the second RNN;
- and
- means for exchanging the state information of the call between the first PDSN and the second PDSN and where in the state information is comprises ACCM information, a LCP negotiated options list, an IP address, an AAA profile, a RADIUS profile, compression parameters, a compression dictionary, and header compression parameters.
A computer readable medium having stored therein instructions for causing a processing unit to execute the following method:
- establishing the call between the mobile node and a first RNN and the mobile node and a first PDSN;
- thereafter, roaming the mobile node and establishing a link between the mobile node and a second RNN;
- selecting a second PDSN to service the mobile node;
- establishing a direct communication path between the first PDSN and the second PDSN;
- and
- exchanging the state information of the call between the first PDSN and the second PDSN using the communication path and wherein state information is comprises ACCM information, a LCP negotiated options list, an IP address, an AAA profile, a RADIUS profile, compression parameters, a compression dictionary, and header compression parameters.
A computer readable medium having stored therein instructions for causing a processing unit to execute the following method:
- establishing an RP session between the mobile node and a first PDSN;
- establishing a MIP session between the mobile node and the first PDSN;
- establishing a RP session and PPP session between the mobile node and the second PDSN, the PPP session having PPP state information, the first PDSN retaining the state information and wherein state information is comprises ACCM information, a LCP negotiated options list, an IP address, an AAA profile, a RADIUS profile, compression parameters, a compression dictionary, and header compression parameters;
- selecting a second PDSN to service the mobile node;
- sending a request from the mobile node to the second PDSN for a MIP session;
- and
- transferring the state information from the first PDSN to the second PDSN.
A computer readable medium having stored therein instructions for causing a processing unit to execute the following method:
- establishing a SIP session between the mobile node and a first PDSN;
- roaming the mobile node and establishing a link with a second RNN
- selecting a second PDSN to service the mobile node;
- sending a request to the second PDSN from the second RNN;
- and
- exchanging the state information of the call between the first PDSN and the second PDSN and wherein state information is comprises ACCM information, a LCP negotiated options list, an IP address, an AAA profile, a RADIUS profile, compression parameters, a compression dictionary, and header compression parameters.
Dependencies are inferred from the claim text.