US5280479A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for insertion of digital packets in a transmission channel
Assignee: Nortel Networks France SAS
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Filing: 1992-06-17
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Granted: 1994-01-18
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Expires: 2012-06-17
Abstract
Abstract The multiplexing device is for insertion of digital packets, supplied by several different sources, in a same transmission channel having an average data rate at least equal to the sum of the average data rates supplied by the sources. It comprising a packet call input unit connected to the transmission channel. The sources are cascaded and the downstream source constitutes an interface towards the input unit. Each source comprises a generator of an insertion priority order for each packet as a function of the type of packet, of the number of stored packets, and of insertion rules associated with the type of packets to be transmitted. Each cascaded source, with the exception of the most upstream source, has a routing circuit supplying at its output the highest priority among the two priorities applied to its input, and of which one corresponds to the source itself and the second to the upstream unit.
Inventors
- 👤 Jean Mary
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:01
CPC Classifications
H; H04; H04N; H04N21/00; H04N21/20; H04N21/23; H04N21/236; H04N21/2365; H04J; H04J3/00; H04J3/24; H04J3/247; H04N21/40; H04N21/43; H04N21/434; H04N21/4347; H04N7/00; H04N7/08; H04N7/083
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
167 words
Multiplexing device for insertion of digital packets, supplied by a plurality of different sources, in a common transmission channel having an average data rate at least equal to the sum of the average data rates supplied by the sources, comprising a packet call input unit connected to the transmission channel, wherein: at least some of said sources are cascaded the downstream one of said cascaded sources constituting an interface with the input unit; each source in the cascade comprises means for generating, for each packet, an insertion priority order which is a function of the type of packet, of the number of stored packets, and of insertion rules associated with the type of packets to be transmitted; and each cascaded source, with the exception of the most upstream source, has a routing circuit supplying at its output the highest priority among the two priorities applied to its input, and of which one corresponds to the respective source itself and the second to the upstream source located upstream.
Claim 2
Dependent Claim
167 words
Multiplexing device for insertion of digital packets, supplied by a plurality of different sources, in a common transmission channel having an average data rate at least equal to the sum of the average data rates supplied by the sources, comprising a packet call input unit connected to the transmission channel, wherein: at least some of said sources are cascaded the downstream one of said cascaded sources constituting an interface with the input unit; each source in the cascade comprises means for generating, for each packet, an insertion priority order which is a function of the type of packet, of the number of stored packets, and of insertion rules associated with the type of packets to be transmitted; and each cascaded source, with the exception of the most upstream source, has a routing circuit supplying at its output the highest priority among the two priorities applied to its input, and of which one corresponds to the respective source itself and the second to the upstream source located upstream.
Claim 3
Dependent Claim
25 words
Device as claimed in claim 1, wherein each source is designed to set the order priority f the packet to be transmitted once for all.
Claim 4
Dependent Claim
28 words
Device as claimed in claim 1, wherein at least some of the sources are designed to give the packets a priority which increases responsive to the waiting time.
Claim 5
Dependent Claim
66 words
Device as claimed in claim 1, wherein each source, other than the upstream source, comprises a routing circuit having a priority comparator controlling a transmission authorization switch and a packet transmission switch, the switches of the sources being mounted in cascade in order to cause the sending of a packet by that source in which the packet stored before being sent first has the highest priority.
Claim 6
Dependent Claim
58 words
Device as claimed in claim 1 for insertion of packets to make up a digital multiplex message of a television signal of the X MAC/PACKET conditional access type, wherein sound channel sources supplying three digital blocks for four packets are designed to increase the priority thereof as soon as the transmission of a group of three blocks begins.
Claim 7
Dependent Claim
77 words
Device as claimed in claim 5, wherein each of the sound channel sources is designed so that the priority thereof rises by one for each stored packet, the increase in priority at the start of the transmission of a group of three blocks being sufficient so that the source that has begun to transmit has a priority higher than that of all the other sound sources attempting to transmit by groups of three blocks in four packets.
Claim 8
Dependent Claim
51 words
Device as claimed in claim 6, for conditional access television signal according to EUROCRYPT standard, characterized in that entitlement management message sources (EMM), entitlement checking message sources (ECM) and a zero channel source are assigned fixed priorities, with degrees increasing in that order and lower than those of the sound channels.
Claim 9
Dependent Claim
164 words
Multiplexing device for insertion of digital packets, supplied by a plurality of different sources, in a common transmission channel having an average data rate at least equal to the sum of the average data rates supplied by the sources, comprising a packet call input unit connected to the transmission channel, wherein: all said sources are cascaded, the downstream one of said cascaded sources constituting an interface with the input unit; each source in the cascade comprises means for generating, for each packet, an insertion priority order which is a function of the type of packet, of the number of stored packets, and of insertion rules associated with the type of packets to be transmitted; and each cascaded source, with the exception of the most upstream source, has a routing circuit supplying at its output the highest priority among the two priorities applied to its input, and of which one corresponds to the respective source itself and the second to the upstream source located upstream.
Claim 10
Dependent Claim
164 words
Multiplexing device for insertion of digital packets, supplied by a plurality of different sources, in a common transmission channel having an average data rate at least equal to the sum of the average data rates supplied by the sources, comprising a packet call input unit connected to the transmission channel, wherein: all said sources are cascaded, the downstream one of said cascaded sources constituting an interface with the input unit; each source in the cascade comprises means for generating, for each packet, an insertion priority order which is a function of the type of packet, of the number of stored packets, and of insertion rules associated with the type of packets to be transmitted; and each cascaded source, with the exception of the most upstream source, has a routing circuit supplying at its output the highest priority among the two priorities applied to its input, and of which one corresponds to the respective source itself and the second to the upstream source located upstream.
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) | 1997-01-17 | 1997-07-19 | 1998-01-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-01-17 | 2001-07-19 | 2002-01-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-01-17 | 2005-07-19 | 2006-01-18 | $7700.00 | Window Closed / Lapsed |