Method of and system for dual-technology traffic provisioning in a wireless system

A method for provisioning analog voice channels and digital voice channels in a wireless system, wherein said wireless system includes singlemode and dualmode mobile wireless units, said method comprising:

• determining the number of analog voice channels necessary to produce a desired singlemode grade of service by ( 1 - e - E a ⁢ ∑ i = 0 A - 1 ⁢ ⁢ E a i i ! ) + ∑ j = 0 A - 1 ⁢ ⁢ ( 1 - e - E d ⁢ ∑ h = 0 T + A - j - 1 ⁢ ⁢ E d h h ! ) ⁢ ( e - E a ⁢ E a j j ! )
• where
• Ea is the number of Analog-only Erlangs,
• Ed is the number of dualmode Erlangs,
• T is the number of digital voice channels, and
• A is the number of analog voice channels;
• and
• determining the number of digital voice channels necessary to produce a desired dualmode grade of service by ( 1 - e - E d ⁢ ∑ i = 0 T - 1 ⁢ ⁢ E d i i ! ) + ∑ j = 0 A - 1 ⁢ ⁢ ( 1 - e - E a ⁢ ∑ h = 0 j ⁢ ⁢ E a h h ! ) ⁢ ( e - E d ⁢ E a T + A - j - 1 ( T + A - j - 1 ) ! )
• where
• Ea is the number of Analog-only Erlangs,
• Ed is the number of dualmode Erlangs,
• T is the number of digital voice channels, and
• A is the number of analog voice channels.