Wideband digital switching network
First Claim
1. A non-blocking wide bandwidth system for connecting a plurality of incoming signal lines (100) to a plurality of outgoing signal lines (110), each of said incoming lines carrying time multiplexed signals and each of said signals having a characteristic bandwidth and a destination address accompanying its data, said system comprising:
- a demultiplexer (101) connected to each of said incoming lines and demultiplexing said time multiplexed signals to form an alterable plurality of signal channels, each having the same preselected bandwidth;
a non-blocking space division switch (10) having switch input and output ports and responsive to said signal channels of said demultiplexers applied to said switch input ports, for simultaneously switching the signal of each of said signal channels to a switch output port which is related to said destination address accompanying the data of said signal; and
a plurality of multiplexers (104), each multiplexing the signals of a chosen number of said switch output ports onto one of said outgoing signal lines.
1 Assignment
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Accused Products
Abstract
Disclosed is a wide bandwidth self-routing switch. One-to-one, one-to-many, and many-to-many modes of communications are achieved with time multiplexed signal packets of multi-service users with a system having a bank of demultiplexers which demultiplex incoming signals and supply them to a broadcast network. The broadcast network includes a concentrator, a "sort on source" sorting network and a copy network. The concentrator permits a reduction in subsequent processing by segregating the incoming lines which carry active signals. The "sort on source" sorting network places all blank copy packets (which are destined to users that wish to tune to a broadcaster) adjacent to the broadcaster'"'"'s signal packets. The copy network copies the information in the broadcaster'"'"'s signal packets into the packets destined to the users. The blank copy packets are continually generated by the users wishing to receive broadcasts or, alternatively, by a blank packet generator.
Signal packets exiting the broadcast network enter a wide bandwidth switch which includes a "sort on destination" sorting network and an expander. The "sort on destination" sorting network arranges the packets in the order of their destination addresses and the expander routes the sorted packets to the desired destinations. The output signals of the expander are time multiplexed and the multiplexed packets are sent to the users.
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Citations
11 Claims
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1. A non-blocking wide bandwidth system for connecting a plurality of incoming signal lines (100) to a plurality of outgoing signal lines (110), each of said incoming lines carrying time multiplexed signals and each of said signals having a characteristic bandwidth and a destination address accompanying its data, said system comprising:
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a demultiplexer (101) connected to each of said incoming lines and demultiplexing said time multiplexed signals to form an alterable plurality of signal channels, each having the same preselected bandwidth; a non-blocking space division switch (10) having switch input and output ports and responsive to said signal channels of said demultiplexers applied to said switch input ports, for simultaneously switching the signal of each of said signal channels to a switch output port which is related to said destination address accompanying the data of said signal; and a plurality of multiplexers (104), each multiplexing the signals of a chosen number of said switch output ports onto one of said outgoing signal lines. - View Dependent Claims (2, 3, 5, 6, 7, 8, 9, 10, 11)
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4. A non-blocking wide bandwidth system for connecting a plurality of incoming signal lines (120) to a plurality of outgoing signal lines (110), each of said incoming lines carrying time multiplexed signals and each of said signals having a characteristic bandwidth and a destination address accompanying its data, said system comprising:
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a demultiplexer block (20) connected to said incoming lines and demultiplexing said time multiplexed signals to form plurality of signal channels of a preselected bandwidth; a non-blocking space division switch (10) having switch input and output ports and responsive to said signal channels of said demultiplexers applied to said switch input ports, for simultaneously switching the signal of each of said signal channels to a switch output port which corresponds to said destination address accompanying the data of said signal; and multiplexer block (30) for simultaneously and separately multiplexing the signals of chosen groups of said switch output ports to form a plurality of multiplexed signals and applying each said multiplexed signal onto one of said outgoing signal lines.
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Specification