Method and apparatus fo reducing latency during handoffs in a communications system
First Claim
1. A method for controlling handoff between a first and second technology, comprising:
- receiving a signal containing an international mobile subscriber identifier;
parsing the international mobile subscriber identifier from the signal in a radio network controller; and
selecting a packet data serving node based on the parsed international mobile subscriber identifier.
1 Assignment
0 Petitions
Accused Products
Abstract
A methodology is provided to reduce data session handoff time between 3G1x and EV-DO technologies for dual mode access terminals. Generally, a dual mode access terminal is communicating with a data network through a base station and a particular packet data service node (PDSN) using EV-DO technology. When the EV-DO technology becomes at least temporarily unavailable, a handoff process is initiated so that communications with the data network may continue using 3G1x technology. During handoff, the access terminal provides an access network identification (ANID) that contains an International Mobile Subscriber Identifier (IMSI). A radio network controller within the base station extracts the IMSI and uses it to select the same PDSN used with the EV-DO technology, which eliminates the need to access an authentication, authorization, and Accounting (AAA) server and perform a re-authentication process.
-
Citations
14 Claims
-
1. A method for controlling handoff between a first and second technology, comprising:
-
receiving a signal containing an international mobile subscriber identifier;
parsing the international mobile subscriber identifier from the signal in a radio network controller; and
selecting a packet data serving node based on the parsed international mobile subscriber identifier. - View Dependent Claims (2, 3, 4)
-
-
5-10. -10. (canceled)
-
11. A communications system, comprising:
-
a radio network controller adapted to receive a signal containing an international mobile subscriber identifier; and
a packet data serving node adapted to receive the international mobile subscriber identifier from the radio network controller. - View Dependent Claims (12, 13, 14)
-
Specification