Apparatus and method to support voip calls for mobile subscriber stations

An apparatus, comprising:

• a call session module adapted to receive a first uplink service flow in an active state for voice over internet protocol (VoIP) signaling and further adapted to generate a connection request message for a VoIP call;
• a connection control module, coupled to the call session module, adapted to receive a dynamic service addition (DSA) request message for a second uplink service flow in an admitted state, with the DSA request message containing an amount of a reserved bandwidth;
• and
• the connection control module, in response to the connection request message, further adapted to send a dynamic service change (DSC) request message to activate the second uplink service flow, with the first and the second uplink service flows being substantially in accordance with an Institute of Electrical and Electronic Engineers (IEEE) 802.16 standard.

An article comprising a machine-readable medium that contains instructions of a service flow management program for a base station, which when executed by the base station, causes the base station to perform operations comprising:

• providing a first uplink service flow in an active state for voice over internet (VoIP) signaling;
• determining that a second uplink service flow for a VoIP call can be supported, with the first and the second uplink service flows being substantially in accordance with an Institute of Electrical and Electronic Engineers (IEEE) 802.16 standard;
• in response to the determining that the second uplink service flow can be supported, reserving an amount of reserved bandwidth for the second uplink service flow;
• and
• activating the second uplink service flow in response to a connection request message for the VoIP call.

A mobile station system, comprising:

• a memory, a mass storage device, and a processor coupled to each other;
• a call-session module and a connection control module coupled to each other and each adapted to be stored in the mass storage device and to be moved to the memory by the processor, with the processor being adapted to execute the call-session module and the connection control module;
• the call session module adapted to receive a first uplink service flow in an active state for voice over internet protocol (VoIP) signaling and further adapted to generate a connection request message for a VoIP call;
• the connection control module adapted to receive a dynamic service addition (DSA) request message for a second uplink service flow in an admitted state, with the DSA request message containing an amount of a reserved bandwidth;
• and
• the connection control module, in response to the connection request message, further adapted to send a dynamic service change (DSC) request message to activate the second uplink service flow, with the first and the second uplink service flows being substantially in accordance with an Institute of Electrical and Electronic Engineers (IEEE) 802.16 standard.