US5754542A — Method and apparatus for system determination in …

Claim 1

Independent Claim 167 words

An apparatus for providing mobile communications in both a code division multiple access (CDMA) communication system and an analog communication system, comprising: a system preferences memory area for storing system preferences: a CMDA channel memory area for storing a list of CDMA channels: a user preferences memory area for storing a list of user preferences: analog modulation and demodulation and processing means for transmitting and receiving information signals in accordance with an analog format wherein said analog format is determined in accordance with entry mode parameters; CDMA modulation and demodulation and processing means for transmitting and receiving said information signals in accordance with a CDMA format wherein said CDMA format is determined in accordance with said entry mode parameters; and system determination means for selecting said entry mode parameters and for selectively providing said transmission format to said analog modulation and demodulation and processing means and said CDMA modulation and demodulation and processing means in response to said system preferences, said user preferences, and said CDMA channels.

Claim 2

Independent Claim 167 words

An apparatus for providing mobile communications in both a code division multiple access (CDMA) communication system and an analog communication system, comprising: a system preferences memory area for storing system preferences: a CMDA channel memory area for storing a list of CDMA channels: a user preferences memory area for storing a list of user preferences: analog modulation and demodulation and processing means for transmitting and receiving information signals in accordance with an analog format wherein said analog format is determined in accordance with entry mode parameters; CDMA modulation and demodulation and processing means for transmitting and receiving said information signals in accordance with a CDMA format wherein said CDMA format is determined in accordance with said entry mode parameters; and system determination means for selecting said entry mode parameters and for selectively providing said transmission format to said analog modulation and demodulation and processing means and said CDMA modulation and demodulation and processing means in response to said system preferences, said user preferences, and said CDMA channels.

Claim 3

Dependent Claim 50 words

The apparatus of claim 1 wherein said analog modulation and demodulation and processing means is further for providing analog exit parameters indicative of a reason for stopping communications using said analog modulation and demodulation and processing means and wherein said system determination means is responsive to said analog exit parameters.

Claim 4

Dependent Claim 50 words

The apparatus of claim 1 wherein said CDMA modulation and demodulation and processing means is further for providing CDMA exit parameters indicative of a reason for stopping communications using said CDMA modulation and demodulation and processing means and wherein said system determination means is responsive to said CDMA exit parameters.

Claim 5

Dependent Claim 67 words

The apparatus of claim 3 wherein when a preferred system stored in said system preferences memory area is not available for acquisition, said system determination means selects a last system with service as a system upon which to attempt communications, and wherein if said last system with service was an analog system, said system determination means passes control to said analog modulation and demodulation and processing means.

Claim 6

Dependent Claim 66 words

The apparatus of claim 2 wherein when a preferred system stored in said system preferences memory area is not available for acquisition, said system determination means selects a last system with service as a system upon which to attempt communications, and wherein if last system with service was a CDMA system, said system determination means passes control to said CDMA modulation and demodulation and processing means.

Claim 7

Dependent Claim 19 words

The apparatus of claim 1 wherein said list of CDMA channels is initially ordered according to said system preferences.

Claim 8

Dependent Claim 34 words

The apparatus of claim 6 wherein said CDMA channel list includes a preferred channel, and wherein said CDMA channel list is reordered each time a CDMA channel different from said preferred channel is acquired.

Claim 9

Dependent Claim 56 words

The apparatus of claim 1 wherein said system determination means is further for providing an analog service resume signal to said analog modulation and demodulation and processing means to prevent said analog modulation and demodulation and processing means from powering down if said apparatus attempts re-acquisition using the same analog system as it has just exited.

Claim 10

Dependent Claim 56 words

The apparatus of claim 1 wherein said system determination means is further for providing a CDMA service resume signal to said CDMA modulation and demodulation and processing means to prevent said CDMA modulation and demodulation and processing means from powering down if said apparatus attempts re-acquisition using the same CDMA system as it has just exited.

Claim 11

Independent Claim 116 words

A method for providing mobile communications in both a code division multiple access (CDMA) communication system and an analog communication system, said method comprising the steps of: storing system preferences; storing a list of CDMA channels; storing a list of user preferences; communicating information signals in accordance with an analog format wherein said analog format is determined in accordance with entry mode parameters; communicating said information signals in accordance with a CDMA format wherein said CDMA format is determined in accordance with said entry mode parameters; and determining said entry mode parameters in accordance with a set of system determination rules, user preferences and an exit reason from a system in which acquisition was last attempted.

Claim 12

Independent Claim 116 words

A method for providing mobile communications in both a code division multiple access (CDMA) communication system and an analog communication system, said method comprising the steps of: storing system preferences; storing a list of CDMA channels; storing a list of user preferences; communicating information signals in accordance with an analog format wherein said analog format is determined in accordance with entry mode parameters; communicating said information signals in accordance with a CDMA format wherein said CDMA format is determined in accordance with said entry mode parameters; and determining said entry mode parameters in accordance with a set of system determination rules, user preferences and an exit reason from a system in which acquisition was last attempted.

Claim 13

Dependent Claim 22 words

The method of claim 10 further comprising the step of generating analog exit parameters indicative of a reason for stopping analog communications.

Claim 14

Dependent Claim 22 words

The method of claim 10 further comprising the step of generating CDMA exit parameters indicative of a reason for stopping CDMA communications.

Claim 15

Dependent Claim 27 words

The method of claim 10 further comprising the step of, when a preferred system is not available for acquisition, attempting acquisition upon a last system with service.

Claim 16

Dependent Claim 42 words

The apparatus of claim 2 further comprising a timer for counting a predetermined time period when communicating using a non-preferred communication system, and wherein said system determination means determines whether a preferred system is available upon expiration of said predetermined time period.

Claim 17

Dependent Claim 53 words

The method of claim 10 wherein said list of CDMA channels is initially ordered according to said system preferences, said list of CDMA channels including a preferred channel, said method further comprising the step of re-ordering said list of CDMA channels each time a CDMA channel different from said preferred channel is acquired.

Claim 18

Dependent Claim 30 words

The method of claim 10 further comprising the step of providing an analog service resume signal if acquisition is attempted using the same analog system as it has just exited.

Claim 19

Dependent Claim 30 words

The method of claim 10 further comprising the step of providing a CDMA service resume signal if acquisition is attempted using the same analog system as it has just exited.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	2001-05-18	2001-11-17	2002-05-19	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	2005-05-18	2005-11-17	2006-05-19	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	2009-05-18	2009-11-17	2010-05-19	$7700.00	Window Closed / Lapsed

Method and apparatus for system determination in a multi-mode subscriber station

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