US3700820A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Adaptive digital communication system
Assignee: International Business Machines Corp
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Filing: 1969-03-18
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Granted: 1972-10-24
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Expires: 1989-03-18
Abstract
Abstract An adaptive digital multiplexer including a multiplex format computer, a time slot generator, and a combiner. The format computer determines the number of time slots required within a time frame and assigns input signals to time slots according to the information rate and priority of each input signal. Assignments are made such that transmission of lower priority input signals are interleaved between transmission of higher priority signals thereby allowing the multiplexed output to be adapted to a reduced transmission rate of increased bit duration by progressively eliminating transmission of lower priority signals.
Inventors
- 👤 Herman L Blasbalg
- 👤 Joshua Y Hayase
- 👤 Richard C Crutchfield Jr
- 👤 Hann F Najjar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:29
CPC Classifications
H; H04; H04L; H04L1/00; H04L1/0001; H04L1/0009; G; G06; G06F; G06F3/00; H04J; H04J3/00; H04J3/02; H04J3/06; H04J3/07; H04J3/16; H04J3/1605; H04J3/1623; H04J3/1647; H04J3/1682; H04L1/0002; H04L1/0015; H04L1/0017; H04L1/0023; H04L1/0025; H04L1/004; H04L1/0045; H04L1/0052
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
203 words
An adaptive multiplexer for time division multiplexing a plurality of digital input signals, each of said input signals having an information rate which is the same as or different from the information rate of any other of said input signals, each of said input signals further being assigned a priority with respect to each other input siGnal, said adaptive multiplexer comprising: a format computer having inputs for receiving signals representing said information rate and said priority of each of said input signals, said format computer computing a number of time slots required within a time frame in accordance with the number of said input signals and said information rate of each of said input signals and computing the time slot assignment for each of said input signals in accordance with its information rate and priority; a time slot generator connected to said format computer for generating a plurality of time slots in accordance with the number of time slots specified by said format computer; a combiner connected to said format computer and to said time slot generator for combining said input signals into said time slots provided by said time slot generator in accordance with the time slot assignment of said format computer.
Claim 2
Dependent Claim
203 words
An adaptive multiplexer for time division multiplexing a plurality of digital input signals, each of said input signals having an information rate which is the same as or different from the information rate of any other of said input signals, each of said input signals further being assigned a priority with respect to each other input siGnal, said adaptive multiplexer comprising: a format computer having inputs for receiving signals representing said information rate and said priority of each of said input signals, said format computer computing a number of time slots required within a time frame in accordance with the number of said input signals and said information rate of each of said input signals and computing the time slot assignment for each of said input signals in accordance with its information rate and priority; a time slot generator connected to said format computer for generating a plurality of time slots in accordance with the number of time slots specified by said format computer; a combiner connected to said format computer and to said time slot generator for combining said input signals into said time slots provided by said time slot generator in accordance with the time slot assignment of said format computer.
Claim 3
Dependent Claim
29 words
The multiplexer of claim 1 wherein the format computer computes the time slot assignments so that input signals having high priority are interleaved with input signals having low priority.
Claim 4
Dependent Claim
6 words
generating said number of time slots;
Claim 5
Dependent Claim
6 words
generating said number of time slots;
Claim 6
Dependent Claim
70 words
combining said information of said next lower priority into first time slots to be dropped and said information of said priority into second time slots to be later dropped, said first time slots being interleaved between said second time slots; whereby said multiplexing may be adapted to a reduced transmission rate of increased bit duration by eliminating transmission of said input signals of next lower priority without repeating step 1.
Claim 7
Dependent Claim
70 words
combining said information of said next lower priority into first time slots to be dropped and said information of said priority into second time slots to be later dropped, said first time slots being interleaved between said second time slots; whereby said multiplexing may be adapted to a reduced transmission rate of increased bit duration by eliminating transmission of said input signals of next lower priority without repeating step 1.
Claim 8
Dependent Claim
30 words
The multiplexer of claim 1 wherein each input signal is supplied to an input/output interface device which retimes each signal so that it is in phase with each other signal.
Claim 9
Independent Claim
50 words
The method of adaptively multiplexing a plurality of input signals, each of said input signals having an information rate which is a power of two of a base rate into an output signal having a rate which is a power of two of said base rate, comprising the steps of:
Claim 10
Independent Claim
50 words
The method of adaptively multiplexing a plurality of input signals, each of said input signals having an information rate which is a power of two of a base rate into an output signal having a rate which is a power of two of said base rate, comprising the steps of:
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-10-24 | 1976-04-24 | 1976-10-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-24 | 1980-04-24 | 1980-10-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-24 | 1984-04-24 | 1984-10-24 | $7700.00 | Window Closed / Lapsed |