Method and apparatus for concurrently processing multiple calls in a spread spectrum communications system

• US 7,184,459 B2
• Filed: 08/07/2003
• Issued: 02/27/2007
• Est. Priority Date: 08/13/1999
• Status: Expired due to Term

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Tiedemann, Edward G. Jr., Sinnarajah, Ragulan
• Primary Examiner(s): Bayard; Emmanuel
• Application Number:
  US10/638,150
• Publication Number:
  US 20040029606A1
• Time in Patent Office: 1,300 Days
• Field of Search: 375/130, 375/133, 375/135, 375/136, 375/141, 375/259, 375/218, 375/220, 375/146, 375/147, 370/320, 370/331, 370/335, 370/446, 379/201, 379/219, 379/229, 455/401, 455/423, 455/450, 455/452
• US Class Current: 375/133
• CPC Class Codes: H04W 28/18 Negotiating wireless communication parameters

Abstract

The call processing state machines defined by the CDMA standards (e.g., IS-95 and IS-2000) are modified to include a “traffic channel” substate indicative of the mobile station processing at least one active call. Call control (CC) state machines of various types are also provided to control the processing of the calls. To process one or more calls concurrently, a CC state machine is instantiated upon receiving an indication to process a particular call. The instantiated CC state machine is identified with, and used to control the processing of, the particular call. Upon receiving an indication to process an additional call, another CC state machine can be instantiated for the additional call. Each call to be processed can also be associated with a particular a service option connection, which includes information indicative of a set of parameters (e.g., the physical channels) to be used for data transmission.

Claims

1. A wireless apparatus for processing calls in a communication system, the wireless apparatus comprising:

a controller to receive an indication of a first call and to instantiate a first call control state machine of a type in accordance with a type of the first call, the first call control state machine being used to control processing of the first call, wherein the controller is further configured to receive an indication of a second call while the first call is pending and instantiate a second call control state machine of a type in accordance with a type of the second call, the first and second call control state machines being used to concurrently control processing of the first and second calls, respectively.

2. The apparatus of claim 1 wherein the controller determines a first service option connection for the first call, the first service option connection including information indicative of a set of parameters to be used for data transmission with respect to the first call.

3. The apparatus of claim 2 wherein the set of parameters includes parameters identifying one or more physical channels to be used for data transmission with respect to the first call.

4. The apparatus of claim 1 wherein the controller determines a second service option connection for the second call, the second service option connection including information indicative of a set of parameters to be used for data transmission with respect to the second call.

5. The apparatus of claim 4 wherein the set of parameters includes parameters identifying one or more physical channels to be used for data transmission with respect to the second call.