Method and apparatus for border node behavior on a full-duplex bus
First Claim
Patent Images
1. In a full-duplex communications system having at least one node compliant with the P1394b standard, a method for determining and communicating the existence of a hybrid bus comprising the acts of:
- determining whether a node has a connection to a Legacy link layer;
if said node determines that it has a connection to a Legacy link layer, then transmitting a Self-ID packet without a Speed Code; and
if said node determines that it does not have a connection to a Legacy link layer, then transmitting a Self-ID packet with a Speed Code.
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Abstract
A method is disclosed for determining and communicating the existence of a hybrid bus. The method comprises the acts of determining whether the node has a connection to a Legacy link layer; if the node determines that it has a connection to a Legacy link layer, then transmitting a Self-ID packet without a Speed Code; and if the node determines that it does not have a connection to a Legacy link layer, then transmitting a Self-ID packet without a Speed Code.
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Citations
31 Claims
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1. In a full-duplex communications system having at least one node compliant with the P1394b standard, a method for determining and communicating the existence of a hybrid bus comprising the acts of:
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determining whether a node has a connection to a Legacy link layer; if said node determines that it has a connection to a Legacy link layer, then transmitting a Self-ID packet without a Speed Code; and if said node determines that it does not have a connection to a Legacy link layer, then transmitting a Self-ID packet with a Speed Code. - View Dependent Claims (2, 3, 4, 5)
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6. A computer readable medium containing computer executable instructions, wherein said instructions when executed by a computer, determine and communicate the existence of a hybrid bus in a full-duplex communications system having at least one node compliant with the P1394b standard, by performing the acts of:
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determining whether a node has a connection to a Legacy link layer; if said node determines that it has a connection to a Legacy link layer, then transmitting a Self-ID packet without a Speed Code; and if said node determines that it does not have a connection to a Legacy link layer, then transmitting a Self-ID packet with a Speed Code. - View Dependent Claims (7, 8, 9, 10)
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11. A device containing computer executable instructions, wherein said instructions when executed by the device, determine and communicate the existence of a hybrid bus in a full-duplex communications system having at least one node compliant with the P1394b standard, by performing the acts of:
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determining whether a node has a connection to a Legacy link layer; if said node determines that it has a connection to a Legacy link layer, then transmitting a Self-ID packet without a Speed Code; and if said node determines that it does not have a connection to a Legacy link layer, then transmitting a Self-ID packet with a Speed Code. - View Dependent Claims (12, 13, 14, 15)
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16. In a serial bus system having a plurality of nodes, a method for determining and communicating the existence of a hybrid bus comprising:
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determining whether at least one node of said plurality of nodes has a connection to a legacy node and transmitting a self-identification packet without a speed designation if said at least one node has a connection to a legacy node;
otherwisetransmitting a self-identification packet with a speed designation if there is no legacy node connection; wherein said presence, or lack thereof, of said speed designation in said self-identification packet indicates to at least one other node the absence or presence, respectively, of a hybrid bus.
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17. A computer-readable storage device having a medium containing instructions, wherein said instructions when executed by a computing device in signal communication with a plurality of nodes, determines and communicates the existence of a hybrid bus in a serial bus communications system by performing the method comprising:
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determining whether said computing device has a connection to a legacy node and transmitting a self-identification packet without a speed designation if said computing device has a connection to a legacy node;
otherwisetransmitting a self-identification packet with a speed designation if there is no legacy node connection; wherein said presence, or lack thereof, of said speed designation in said self-identification packet indicates to at least one other node the absence or presence, respectively, of a hybrid bus.
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18. A computer-readable storage device having a medium containing instructions, wherein said instructions when executed by a computing device in signal communication with a plurality of nodes, determines and communicates the existence of a hybrid bus in a serial bus communications system by performing the method comprising:
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determining whether said storage device has a connection to a legacy node and transmitting a self-identification packet without a speed designation if said device has a connection to a legacy node;
otherwisetransmitting a self-identification packet with a speed designation if there is no legacy node connection; wherein said presence, or lack thereof, of said speed designation in said self-identification packet indicates to at least one other node the absence or presence, respectively, of a hybrid bus.
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19. A computer-readable storage device having a medium comprising instructions, wherein said instructions when executed by a computing device in signal communication with a plurality of nodes, determines and communicates the existence of a hybrid bus in a serial bus communications system by performing the method comprising:
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determining whether said storage device has a connection to a legacy node and transmitting a first packet without a speed designation if said device has a connection to a legacy node;
otherwisetransmitting a second packet with a speed designation if there is no legacy node connection; wherein said presence, or lack thereof, of said speed designation in said first and second packets indicates to at least one other node the absence or presence, respectively, of a hybrid bus. - View Dependent Claims (20, 21, 22, 23)
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24. A device in signal communication with a plurality of nodes, said device comprising apparatus to determine and communicate the existence of a hybrid bus in a serial bus communications system by performing the method, comprising:
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determining whether said device has a connection to a legacy node via an identification process; transmitting a first identification packet with a speed designation if there are no legacy node connections; and transmitting a second identification packet without said speed designation if said device has a connection to a legacy node; wherein said presence, or lack thereof, of said speed designation in said first or second identification packet indicates to at least one other node the absence or presence, respectively, of said hybrid bus. - View Dependent Claims (25, 26, 27, 28)
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29. In a serial bus system having a plurality of nodes, a method for determining and communicating the existence of a hybrid bus, said hybrid bus supporting first and second serialized protocols, the method comprising:
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determining whether at least one node of said plurality of nodes has a connection to a node operating under said first protocol and transmitting a first packet having identification information but without a speed designation if said at least one node has a connection to a node operating under said first protocol;
otherwisetransmitting a second packet having identification information and a speed designation if there is no connection to a node operating under said first protocol; wherein said presence, or lack thereof, of said speed designation in said first or second packet indicates to at least one other node the absence or presence, respectively, of said hybrid bus. - View Dependent Claims (30, 31)
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Specification