| 主权项 |
1. A method, comprising:
receiving a first provide message, from a server, comprising periodic assistance data, said first provide message comprising a transaction identifier identifying a first transaction; determining whether a change in periodic assistance data is to be made; in response to determining that the change is to be made, transmitting, from a communication device, a request message with an information element, wherein the request message is configured to request to modify the periodic assistance data without triggering a new transaction in order to get modified periodic assistance data; and the information element is configured to request the change in a set of virtual reference receivers (VRR) by requesting a transmission of reference assistance data for a first VRR and discontinuing an existing transmission of reference assistance data for a second VRR; and receiving a second provide message, from said server, comprising the modified periodic assistance data, said second provide message comprising the transaction identifier identifying the first transaction; wherein said provide messages and said request messages are linked by a periodic session identification parameter. |
