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

• US 8,265,660 B1
• Filed: 09/28/2007
• Issued: 09/11/2012
• Est. Priority Date: 09/28/2007
• Status: Active Grant

• Current Assignee: Sprint Spectrum LP (Deutsche Telekom AG)
• Original Assignee: Sprint Spectrum LP (Deutsche Telekom AG)
• Inventors: Vargantwar, Sachin, Doshi, Kamal, Goyal, Anoop, Shetty, Manoj, Oroskar, Siddharth
• Primary Examiner(s): Agosta, Steve D
• Application Number:
  US11/904,797
• Time in Patent Office: 1,810 Days
• Field of Search: 455/412.1, 455/0.2, 455/413, 455/418, 455/434, 455/435.2, 455/458, 370/310, 370/310.2, 370/322, 379/93.24, 379/211.01
• US Class Current: 455/458
• CPC Class Codes: H04W 68/00 User notification, e.g. alerting and paging, for incoming communication, change of service or the like
• CPC Class Codes: H04W 74/00 Wireless channel access
• CPC Class Codes: H04W 76/10 Connection setup
• CPC Class Codes: H04W 88/14 Backbone network devices

Abstract

Methods are described for handling an incoming call at a mobile switching center when the mobile station is currently in either an access state (in the process of making an outgoing call) or in a paging state (in the process of receiving an earlier incoming call). The mobile switching center waits until the mobile station transitions out of the access state or paging state into a traffic state. The mobile switching center sends an alert message to the mobile station alerting the user of the new incoming call. The mobile switching center handles the incoming call per a response to the alert message. One option would be to send the new incoming call to the user and drop the other incoming call (or the outgoing call). Another option would be to direct the incoming call to voice mail. In either case, the handling of the incoming call is per the user'"'"'s direction, i.e., as dictated by the response message.

Claims

1. A method comprising:

receiving into a wireless telephone network a request to connect a new call to a mobile station served by the network;

upon receipt of the request, the network detecting that the mobile station is currently in a first state selected from the group consisting of an access state and a paging state, wherein when the mobile station is in the first state, the network does not transmit to the 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

responsive to detecting that the mobile station is currently in the first state upon receipt of the request, the network waiting 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, the network then transmitting to the mobile station a notification of the new call, to facilitate providing the user of the mobile station with an option to take the new call.

2. The method of claim 1, further comprising:

the network receiving from the mobile station a response to the notification; and

the network handling the new call in accordance with the received response.

3. The method of claim 2, wherein the response includes data representing how the network should handle the new call.

4. The method of claim 3, wherein the data represents a call handling directive entered into the mobile station by the user.

5. The method of claim 4, wherein the directive is to connect the new call to the mobile station.

6. The method of claim 2, wherein handling the new call in accordance with the received response comprises abandoning a call for which the mobile station was in the first state, and instead connecting the new call to the mobile station.

7. The method of claim 2, wherein handling the new call in accordance with the received response comprises sending the new call to voice mail.

8. The method of claim 1, wherein detecting that the mobile station is currently in the first state comprises referring to data that specifies the state of registered mobile stations, and determining from the data that the mobile station is currently in the first state.

9. The method of claim 1, wherein waiting until the mobile station has transitioned out of the first state and into a traffic state comprises setting a timer, waiting for the timer to expire, and upon expiration of the timer then determining whether the mobile station has transitioned to the traffic state.

10. 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.

11. The improvement of claim 10, wherein the instructions are further executable to receive from the mobile station a response to the notification and to handle the new call in accordance with the received response.

12. The improvement of claim 11, wherein the response includes data representing a call handling directive entered into the mobile station by the user.

13. The improvement of claim 12, wherein, in accordance with the directive, the instructions are executable to abandon a call for which the mobile station was in the first state, and to instead connect the new call to the mobile station.

14. The improvement of claim 12, wherein, in accordance with the directive, the instructions are executable to send the new call to voice mail.

15. The improvement of claim 10, wherein the instructions are executable to wait until the mobile station has transitioned out of the first state and into a traffic state by applying a process comprising (i) setting a timer, (ii) waiting for the timer to expire, and (iii) upon expiration of the timer then determining whether the mobile station has transitioned to the traffic state.

16. 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.

17. The method of claim 16, 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.

18. The method of claim 17, wherein the first and second timer values are 30 seconds or less.

19. 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.

20. The improvement of claim 19, wherein the first and second timer values are 30 seconds or less.