Method and system for supporting call origination before session establishment

A method for an access terminal, comprising:

• said access terminal establishing a session with a first radio access network (RAN), wherein establishing said session with said first RAN comprises said access terminal receiving a first terminal identifier assigned by said first RAN and negotiating first-RAN configuration settings for radio communications between said access terminal and said first RAN;
• said access terminal moving from said first RAN to a second RAN;
• and
• before said access terminal has a session established with said second RAN, said access terminal (i) receiving a request to originate a call, (ii) engaging in radio communications with said second RAN to request air interface resources for said call, wherein said radio communications with said second RAN comprise said access terminal transmitting said first terminal identifier, an indication that said first terminal identifier is a previously-assigned terminal identifier, and a date and time that said first terminal identifier was previously assigned to said access terminal to said second RAN, and (iii) receiving a traffic channel assignment from said second RAN.