US5883893A
Expired / Lapsed
US
⏱️ 0.0 years remaining
ATM voice transport protocol
Assignee: Cisco Technology Inc
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Filing: 1996-09-10
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Granted: 1999-03-16
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Expires: 2016-09-10
Abstract
Abstract A transport layer protocol for a compressed voice, facsimile and modem data includes a voice packetization sublayer; a voice transport sublayer; and a voice payload segmentation and reassembly sublayer. The voice payload segmentation and reassembly sublayer breaks up user data packets into segments. Each segment includes a header and a payload data unit. Voice data segments have payloads made up of voice data. Signaling payloads are made up of op codes, which define the type of signaling message, and related operands.
Inventors
- 👤 Mark Rumer
- 👤 Michael D. Savini
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:17
CPC Classifications
H; H04; H04Q; H04Q11/00; H04Q11/04; H04Q11/0428; H04Q11/0478; H04L; H04L12/00; H04L12/54; H04L12/56; H04L12/5601; H04L2012/5629; H04L2012/563; H04L2012/5638; H04L2012/5671
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
82 words
A transport layer protocol comprising: a packetization sublayer configured to accept voice, compressed voice, facsimile or modem data from a user application and to produce data packets therefrom, the packetization sublayer further configured to accept signaling information relating to the voice, compressed voice, facsimile or modem data and to produce signaling packets therefrom only upon signaling transitions; and a payload segmentation sublayer configured to generate fixed length cells from the data and signaling packets, each cell comprising a header and a payload.
Claim 2
Dependent Claim
82 words
A transport layer protocol comprising: a packetization sublayer configured to accept voice, compressed voice, facsimile or modem data from a user application and to produce data packets therefrom, the packetization sublayer further configured to accept signaling information relating to the voice, compressed voice, facsimile or modem data and to produce signaling packets therefrom only upon signaling transitions; and a payload segmentation sublayer configured to generate fixed length cells from the data and signaling packets, each cell comprising a header and a payload.
Claim 3
Dependent Claim
20 words
The transport layer protocol of claim 1 wherein each header comprises an information field specifying the contents of the payload.
Claim 4
Dependent Claim
29 words
The transport layer protocol of claim 2 wherein each header further comprises a packet sequence number specifying a temporal position of an associated payload in a sequence of cells.
Claim 5
Dependent Claim
22 words
The transport layer protocol of claim 3 wherein each header further comprises a priority field specifying a priority of the associated cell.
Claim 6
Dependent Claim
33 words
The transport layer protocol of claim 1 wherein each payload of a cell generated from one or more signaling packets includes a signaling message identification code (op code) and a signaling message (operand).
Claim 7
Dependent Claim
70 words
The transport layer protocol of claim 5 wherein the signaling message is chosen from the group consisting of a coding supported enquiry message, a coding supported acknowledge message, a coding change message, a coding change acknowledge message, a status update message, a dial digit forwarding message, a dial digit acknowledge message, a dialing complete message, a dialing complete acknowledge message, a call progress tone message, and a transport ping message.
Claim 8
Dependent Claim
30 words
The transport layer protocol of claim 6 wherein the status update message comprises a relative transition time field specifying a temporal relation between a signaling message and a voice packet.
Claim 9
Dependent Claim
31 words
The transport layer protocol of claim 7 wherein the status update message further comprises a signaling condition type field specifying configuration information for a network node which receives the signaling message.
Claim 10
Dependent Claim
33 words
The transport layer protocol of claim 8 wherein the status update message further comprises a voice coding type field specifying a method of encoding speech samples for data packets which include voice data.
Claim 11
Dependent Claim
17 words
The transport layer protocol of claim 6 wherein the status update message includes a signaling condition field.
Claim 12
Dependent Claim
18 words
The transport layer protocol of claim 10 wherein the signaling condition field is an out-of-band signaling condition field.
Claim 13
Dependent Claim
18 words
The transport layer protocol of claim 10 wherein the signaling condition field is an in-band signaling condition field.
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) | 2002-03-15 | 2002-09-14 | 2003-03-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2006-03-15 | 2006-09-14 | 2007-03-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2010-03-15 | 2010-09-14 | 2011-03-16 | $7700.00 | Window Closed / Lapsed |