Mukesh Lilchand Patel

US Patent:

6708044, Mar 16, 2004

Filed:

Apr 4, 2000

Appl. No.:

09/542188

Inventors:

William Puknat - Plano TX
Mukesh Patel - Coppell TX
Dongan Zhang - Plano TX

Assignee:

NEC America, Inc. - Melville NY

International Classification:

H04M 100

US Classification:

4555521, 455 76, 4555501, 455 75

Abstract:

A method and apparatus for providing time-critical band selection in a communication device with dual band or multi-band switching, or, alternatively, for providing dual mode or multi-mode time critical operating ability. The mobile station typically has a transmitter section and a receiver section each capable of dual modes of operation, a frequency synthesizer and a controller. The band to band operating method utilizes a frequency command data signal where data derived from the signal is used in a determinable bit stream of data including a frequency data word. The frequency data word is used for defining an operational state of the synthesizer frequency thereby implementing the transceivers operating channel. At least one bit (or functional bits) from within the bit stream or received signal is used for defining, at least momentarily, the transceivers ânewâ operating band (or state). The functional bits can also be used to effectuate other time critical operations of the mobile station, including band to band switching operations (such as MAHO) over two distinct frequency bands; or, one or more can be used to switch or enable control circuits or functions or operations which are time limited or time constrained or which implicate time critical operations of the communication device or apparatus.