US5440542A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for multiplexing control information into a user signal stream of a CDMA cellular system
Assignee: Motorola Solutions Inc
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Filing: 1993-10-14
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Granted: 1995-08-08
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Expires: 2013-10-14
Abstract
Abstract A method and apparatus is offered of multiplexing control information into a user signal stream in a cellular communication system using code division multiple access. The method includes the steps of determining a temporal measure (101) of control information to be substituted for a corresponding measure of user information, substituting (102) the control information into the signal stream while buffering a corresponding temporal measure of user information, and resuming transmission (103) of user information beginning with the buffered user information.
Inventors
- 👤 Lee M. Procter
- 👤 Jay P. Jayapalan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 14:10
CPC Classifications
H; H04; H04B; H04B7/00; H04B7/24; H04B7/26; H04B7/2628; H04W; H04W88/00; H04W88/18; H04W88/181
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
164 words
In a base station controller of a cellular communication system using code division multiple access encoding, a method of multiplexing control information for a communication unit into a user signal stream, the method comprising the steps of: receiving at a transcoder of the base station from an interworking function of the cellular system, user information to be encoded and communicated to the communication unit in the user signal stream; receiving at the transcoder control information to be inserted in the user signal stream; determining a temporal measure of the received control information; inserting the control information into the user signal stream while buffering a corresponding temporal measure of user information; communicating the temporal measure to the interworking function by marking a corresponding temporal measure of information communicated from the transcoder to the interworking function on a reverse channel; generating, within the interworking function, a set of null characters temporally equal to the temporal measure; and substituting the buffered user information for the null characters.
Claim 2
Dependent Claim
164 words
In a base station controller of a cellular communication system using code division multiple access encoding, a method of multiplexing control information for a communication unit into a user signal stream, the method comprising the steps of: receiving at a transcoder of the base station from an interworking function of the cellular system, user information to be encoded and communicated to the communication unit in the user signal stream; receiving at the transcoder control information to be inserted in the user signal stream; determining a temporal measure of the received control information; inserting the control information into the user signal stream while buffering a corresponding temporal measure of user information; communicating the temporal measure to the interworking function by marking a corresponding temporal measure of information communicated from the transcoder to the interworking function on a reverse channel; generating, within the interworking function, a set of null characters temporally equal to the temporal measure; and substituting the buffered user information for the null characters.
Claim 3
Dependent Claim
56 words
The method of claim 1 wherein the step of communicating the temporal measure of user information to the interworking function by marking a corresponding temporal measure of information on a reverse channel comprises setting a status bit in a plurality of communication frames being communicated on the reverse channel temporally equal to the corresponding temporal measure.
Claim 4
Dependent Claim
44 words
The method of claim 2 wherein the step of generating, within the interworking function, a set of null characters temporally equal to the buffered user information comprises generating null frames in one-for-one correspondence to the plurality of communication frames having a set status bit.
Claim 5
Independent Claim
181 words
An apparatus for multiplexing a control signal intended for a communication unit of a cellular communication system into a user signal stream at a base station controller, the apparatus comprising: a transcoder operably interconnected with the base station controller and an interworking function; a register within the transcoder for receiving the control signal from the base station controller; a first processor within the transcoder for determining a temporal length of the control signal; a second processor for inserting the control signal into the user signal stream while buffering a corresponding temporal length of user information received from the interworking function; a signal path associated with information being communicated on a reverse channel from the transcoder to the interworking function for communicating the temporal length of the buffered user information to the interworking function; a third processor within the interworking function for generating null characters within the user signal stream for a time period substantially equal to the temporal length of the buffered user information; and a fourth processor within the transcoder for substituting the buffered user information for the null characters.
Claim 6
Independent Claim
181 words
An apparatus for multiplexing a control signal intended for a communication unit of a cellular communication system into a user signal stream at a base station controller, the apparatus comprising: a transcoder operably interconnected with the base station controller and an interworking function; a register within the transcoder for receiving the control signal from the base station controller; a first processor within the transcoder for determining a temporal length of the control signal; a second processor for inserting the control signal into the user signal stream while buffering a corresponding temporal length of user information received from the interworking function; a signal path associated with information being communicated on a reverse channel from the transcoder to the interworking function for communicating the temporal length of the buffered user information to the interworking function; a third processor within the interworking function for generating null characters within the user signal stream for a time period substantially equal to the temporal length of the buffered user information; and a fourth processor within the transcoder for substituting the buffered user information for the null characters.
Claim 7
Dependent Claim
32 words
The apparatus of claim 4 wherein the signal path comprises status bits associated with the information being communicated on the reverse channel for indicating the amount of null characters to be generated.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1998-08-07 | 1999-02-06 | 1999-08-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-08-07 | 2003-02-06 | 2003-08-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-08-07 | 2007-02-06 | 2007-08-08 | $7700.00 | Window Closed / Lapsed |