1. A method for providing mobile communication walkie-talkie services in a communication system including a base station controller and at least one mobile unit, comprising:
determining a first slot cycle using a first slot cycle index,
determining a second slot cycle using a second slot cycle index,
monitoring a first paging channel, over which communications are sent, during the first slot cycle, whereby the first paging channel is enabled for providing cellular call services,
monitoring a second paging channel, over which communications are sent, during the second slot cycle, whereby the second paging channel is reserved for and dedicated to providing one-to-one walkie-talkie services,
using mobile unit usage data to determine when to begin the monitoring of the second paging channel wherein the mobile unit usage data is stored in a profile associated with a mobile unit and indicates how often the mobile unit uses walkie-talkie services, automatically setting up the monitoring of the second paging channel before a walkie-talkie call is initiated on the mobile unit if the mobile unit profile indicates a usage of walkie-talkie services exceeding a threshold level, and not setting up the monitoring of the second paging channel until after a walkie-talkie call is initiated on the mobile unit if the mobile unit profile indicates a usage of walkie-talkie services not exceeding a threshold level.
2. The method of claim 1, wherein the step of determining a second slot cycle comprises determining the second slot cycle using a slot cycle index having a value less than two.
3. The method of claim 1, wherein the step of determining a second slot cycle comprises determining the second slot cycle using a negative slot cycle index.
4. The method of claim 1, wherein the step of determining a second slot cycle comprises determining the second slot cycle using a slot cycle index having a value of negative one.
5. A method for providing dedicated paging channels for walkie-talkie paging services in a communications system including a base station controller and at least one mobile unit, the method comprising the steps of:
assigning one or more mobile units to a first paging channel over which communications are sent,
assigning the one or more mobile units to a second paging channel over which communications are sent,
determining a first slot cycle for each of the one or more mobile units,
determining a second slot cycle for each of the one or more mobile units,
using the first paging channel to notify each of the one or more mobile units of a cellular call, and
using the second paging channel to notify each of the one or more mobile units of a walkie-talkie call,
wherein the second paging channel is reserved for and dedicated to providing one-to-one walkie-talkie services, and
wherein the one or more mobile units are not assigned to the second paging channel until after a walkie-talkie call is initiated on the respective mobile units.
6. The method of claim 5, wherein the determining a second slot cycle step uses a second slot cycle index to determine the second slot cycle.
7. The method of claim 6, further comprising the step of setting the second slot cycle index to a value less than two.
8. The method of claim 6, further comprising the step of setting the second slot cycle index to a value of negative one.
9. A mobile communications device comprising:
a receiver for receiving a first slot cycle index and a second slot cycle index,
a controller for determining a first slot cycle using the first slot cycle index and a second slot cycle using the second slot cycle index, wherein the first slot cycle is used to monitor a first paging channel, over which communications are sent, used for providing cellular call services, and the second slot cycle is used to monitor a second paging channel, over which communications are sent, reserved for and dedicated to providing one-to-one walkie-talkie services, and
a power supply that supplies power to the receiver during the first slot cycle and the second slot cycle,
wherein the second paging channel is not monitored until after a walkie-talkie call is initiated on the mobile communications device.
10. A mobile communications system comprising:
a base station controller,
a base station configured to assign one or more mobile units to a first paging channel, over which communications are sent, used for providing cellular call services, and a second paging channel, over which communications are sent, reserved for and dedicated to providing one-to-one walkie-talkie services, and
a receiver configured to receive a first slot cycle for each of the one or more mobile units and a second slot cycle for each of the one or more mobile units,
wherein the one or more mobile units are not assigned to the second paging channel until after a walkie-talkie call is initiated on the respective mobile units.
11. The mobile communications system of claim 10, wherein the first paging channel enables notification of a cellular call to each of the one or more mobile units and the second paging channel enables notification of a walkie-talkie call to each of the one or more mobile units.
12. The mobile communications system of claim 10, further comprising a mobile unit profile for each of the one or more mobile units.
13. The method of claim 1, wherein the threshold level represents a ratio of walkie-talkie services to cellular call services.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A black-and-white radiographic material for providing a black-and-white-image comprising a support and disposed on at least one side of said surface, one or more hydrophilic colloid layers including a tabular grain silver halide emulsion layer containing predominantly spectrally sensitized tabular silver halide grains,
said silver halide emulsion further comprising at least 0.5 mmolmol of silver of an amido compound as an antifoggant precursor that slowly releases an antifoggant, that is in reactive association with silver halide in at least one tabular grain silver halide emulsion layer.
2. The material of claim 1 wherein said antifoggant precursor is present in an amount of from about 0.5 to about 4 mmolmol of total silver of each side of said support.
3. The material of claim 1 wherein said amido compound is represented by the following Structure (I):
wherein INH is a development inhibitor moiety, LINK is a linking or timing group, m is 0, 1 or 2, and R1 and R2 independently represent an aliphatic, aromatic or heterocyclic group, or R1 and R2 together with the nitrogen to which they are attached represent the atoms necessary to form a 5- or 6-membered ring or multiple ring system, or R1 and R2 are independently a \u2014C(\u2550O)(LINK)m-INH group, or are substituted with an \u2014NR3aC(\u2550O)-(LINK)m-INH group, with R3a being defined the same as R1 and R2.
4. The material of claim 3 wherein INH is a mercaptotetrazole.
5. The material of claim 4 wherein INH is a substituted phenyl mercaptotetrazole.
6. The material of claim 1 wherein said amido compound is one or more of the following compounds (D), (L), or (U):
7. The material of claim 1 comprising two or more amido compounds each having a different INH moiety.
8. The material of claim 1 wherein said tabular grain silver halide emulsion layer comprises green-sensitized tabular silver halide grains that have an aspect ratio of at least 30, an average ECD of at least 2.5 \u03bcM, an average grain thickness of from about 0.07 to about 0.1 \u03bcM, and comprise at least 90 mol % bromide and up to 10 mol % iodide, both based on total silver in said grains.
9. The material of claim 8 wherein said tabular grain silver halide emulsion layer comprises green-sensitized tabular silver halide grains that have an aspect ratio of from about 30 to about 50, an average ECD of from about 2.5 to about 3.5 \u03bcm, an average grain thickness of from about 0.07 to about 0.09 \u03bcm, and comprise at least 95 mol % bromide and up to 5 mol % iodide, both based on total silver in said grains.
10. The material of claim 1 wherein said tabular grain silver halide emulsion layer comprises blue-sensitized tabular silver halide grains that have an aspect ratio of at least 25, an average ECD of at least 3 \u03bcm, an average grain thickness of from about 0.1 to about 0.15 \u03bcm, and comprise at least 90 mol % bromide and up to 5 mol % iodide, both based on total silver in said grains.
11. The material of claim 10 wherein said tabular grain silver halide emulsion layer comprises blue-sensitized tabular silver halide grains that have an aspect ratio of from about 25 to about 35, an average ECD of from about 3 to about 3.5 \u03bcm, an average grain thickness of from about 0.11 to about 0.14 \u03bcm, and comprise at least 95 mol % bromide and up to 5 mol % iodide, both based on total silver in said grains.
12. The material of claim 1 wherein said tabular silver halide grains are green-sensitized and said material has a total silver coverage of at least 15 and up to 18 mgdm2 on said tabular grain silver halide emulsion side of said support, and a polymer vehicle coverage on said tabular grain emulsion side of said support of from about 28 to about 34 mgdm2, or
said tabular silver halide grains are blue-sensitized and said material has a total silver coverage of at least 17 and up to 20 mgdm2 on said tabular grain silver halide emulsion side of said support, and a polymer vehicle coverage on said tabular grain emulsion side of said support of from about 28 to about 34 mgdm2.
13. The material of claim 1 comprising the same or different tabular grain silver halide emulsion layers on both sides of said support.
14. The material of claim 1 said tabular silver halide grains are sensitive to radiation within the range of from about 420 to about 560 nm.
15. The material of claim 1 wherein said tabular silver halide grains are spectrally sensitized with a combination of first and second spectral sensitizing dyes that have maximum J-aggregate absorptions on said tabular silver halide grains of from 380 to 500 nm, wherein the maximum J-aggregate absorption of said first spectral sensitizing dye is from 20 to 50 nm lower in wavelength than the maximum J-aggregate absorption of said second spectral sensitizing dye, the molar ratio of said first spectral sensitizing dye to said second spectral sensitizing dye being from 0.25:1 to 1:1, and said first and second spectral sensitizing dyes being present to provide from 50 to 100% of saturation coverage of said tabular silver halide grains.
16. The material of claim 15 wherein said first spectral sensitizing dye is an anionic benzimidazole-benzoxazole simple cyanine having at least one sulfo or carboxy group in the molecule, and said second spectral sensitizing dye is an anionic benzothiazole\u2014benzothiazole simple cyanine having at least one sulfo or carboxy group in the molecule.
17. The material of claim 16 wherein said first spectral sensitizing dye is a monomethine cyanine dye represented by the following Structure II:
wherein Z1\u2032 and Z2\u2032 represent the carbon atoms necessary to form a substituted or unsubstituted benzene or naphthalene ring, R1\u2032, R2\u2032, and R3\u2032 are independently substituted or unsubstituted alkyl, alkoxy, aryl, or alkenyl groups, R6\u2032 is hydrogen or a substituted or unsubstituted alkyl or phenyl groups, X1\u2032 is an anion or cation as needed, provided that Structure II also comprises at least one sulfo or carboxy group, and
said second spectral sensitizing dye is a monomethine cyanine dye represented by the following Structure (III):
wherein Z1\u2032 and Z2\u2032 represent the carbon atoms necessary to form a substituted or unsubstituted benzene or naphthalene ring, R4\u2032 and R5\u2032 are independently substituted or unsubstituted alkyl, alkoxy, aryl, or alkenyl groups, R6\u2032 is hydrogen or a substituted or unsubstituted alkyl or phenyl group, X2\u2032 is an anion or cation as needed, and provided that Structure III also comprises at least one sulfo or carboxy group.
18. The material of claim 1 further comprising a protective overcoat disposed over said tabular grain silver halide emulsion layer.
19. The material of claim 18 wherein said protective overcoat is a conductive protective overcoat comprising one or more antistatic agents.
20. The material of claim 1 comprising a polymeric support that has first and second major surfaces, said radiographic material having disposed each of said first and second major support surfaces, the same hydrophilic colloid layers including a single tabular grain silver halide emulsion layer,
said tabular grain silver halide emulsion layer comprising:
a) green-sensitized tabular silver halide grains that have an aspect ratio of from about 30 to about 40, an average ECD of from about 2.5 to about 3 \u03bcm, and an average thickness of from about 0.07 to about 0.09 \u03bcm, and comprise at least 95 mol % bromide and up to 5 mol % iodide, both based on total silver in said grains, or
b) blue-sensitized tabular silver halide grains that have an aspect ratio of from about 25 to about 30, an average ECD of from about 3 to about 3.5 \u03bcm, and an average thickness of from about 0.11 to about 0.14 \u03bcm, and comprise at least 95 mol % bromide and up to 5 mol % iodide, both based on total silver in said grains,
said material comprising a protective overcoat disposed over all of said hydrophilic colloid layers on both sides of said support,
wherein each of said tabular grain silver halide emulsion layers comprises said amido compound at from about 0.5 to about 2 mmolmol of total silver on each side of said support,
said amido compound comprising one or more of the following compounds (D), (L), or (U):
21. The material of claim 20 wherein said tabular grains on each side of said support are green-sensitized and said protective overcoat is a conductive protective overcoat comprising one or more antistatic agents.
22. An imaging assembly comprising:
A) a radiographic material of claim 1, and
B) a fluorescent intensifying screen or storage phosphor panel arranged on the imaging side of said radiographic material, said screen or panel comprising an inorganic phosphor capable of absorbing X-rays and emitting electromagnetic radiation having a wavelength greater than 300 nm, said inorganic phosphor being coated in admixture with a polymeric binder in a phosphor layer on a support.
23. A method of providing a black-and-white image comprising processing an exposed radiographic material of claim 1 to provide a black-and-white image.
24. The material of claim 1 wherein said amido compound is represented by the following Structure (I):
wherein INH is a development inhibitor moiety, LINK is a linking or timing group, m is 0, 1 or 2, and R1 and R2 independently represent an aliphatic or heterocyclic group, or R1 and R2 together with the nitrogen to which they are attached represent the atoms necessary to form a 5- or 6-membered ring or multiple ring system, or R1 and R2 are independently a \u2014C(\u2550O)(LINK)m-INH group, or are substituted with an \u2014NR3aC(\u2550O)-(LINK)m-INH group, with R3a being defined the same as R1 and R2.