Incoming call processing for mobile stations currently in an access state or paging state

In a mobile switching center, the improvement comprising:

• memory storing state information specifying respectively for each mobile station of a plurality of mobile stations whether the mobile station is currently in a first state selected from the group consisting of an access state and a paging state;
• instructions executable by a processing unit of the mobile switching center, upon receipt of a request to connect a new call to a given mobile station:
• (a) to determine from the state information that the given mobile station is currently in the first state, wherein when the given mobile station is in the first state, the mobile switching center does not transmit to the given mobile station a notification of the new call and a user of the mobile station therefore does not have an option to take the new call, and
• (b) responsive to detecting that the mobile station is currently in the first state upon receipt of the request, to wait until the mobile station has transitioned out of the first state and into a traffic state and, once the mobile station has transitioned to the traffic state, to then transmit to the mobile station a notification of the new call so as to facilitate providing the user of the mobile station with an option to take the new call.

A method of processing an incoming call for a mobile station, comprising the steps of:

• receiving an incoming call for the mobile station at a mobile switching center;
• checking the current state of the mobile station;
• in the event that the mobile station is in an access state or paging state, (a) waiting until the mobile station transitions to a traffic state, (b) after the mobile station transitions to a traffic state, sending an alert message to the mobile station informing the mobile station of the incoming call, (c) receiving a response to the alert message from the mobile station, and (d) handling the incoming call in accordance with the response,
• wherein waiting until the mobile station transitions to the traffic state comprises (i) setting a timer having a timer value, (ii) waiting for the timer value to elapse, (iii) re-checking the state of the mobile station, and proceeding with step (b) if the mobile station has transitioned to the traffic state but repeating steps (i), (ii), and (iii) if the mobile station has not transitioned to the traffic state.

In a mobile switching center, the improvement comprising:

• providing a memory maintaining state information as to whether mobile stations are currently in an access state or a paging state;
• and
• providing instructions in the mobile switching center whereby in the event that an incoming call for a mobile station occurs while the mobile station is in either the access state or a paging state the mobile switching center performs a waiting step and waits until the mobile station transitions to a traffic state, and thereafter the mobile switching center sends an alert message to the mobile station alerting the mobile station of the incoming call,
• wherein the waiting step comprises the steps of (i) setting a timer having a timer value, (ii) waiting for the timer value to elapse, (iii) re-checking the state of the mobile station, and proceeding to send the alert message if the mobile station has transitioned to the traffic state,
• wherein the timer value has a first value if the mobile station is in the paging state and the timer value has a second value if the mobile station is in the access state.