Traffic management system including packet to object synchronization mechanisms
First Claim
1. A packet control unit (Ra, Rb, Rc, Rd;
- PCU1-PCUn) for being included in a packet switched control network (PSCN) as one of a plurality of packet control units for controlling a packet traffic constituted by a plurality of packets (CP1-CPx) being routed between said packet control units along a plurality of packet routing links (PRL1-PRLm), said packet switched control network (PSCN) being configured in such a way that said packet routing links (PRL1-PRLm) and said packet control units (Ra, Rb;
PCU1-PCUn) respectively correspond to path sections (RDS1-RDSm) and path points (ICP1-ICPn) of an object movement network (RDN) in which an object traffic is formed by a plurality of objects (C1-Cx) moving along said path sections (RDS1-RDSm) between said path points (ICP1-ICPn), and each path point (ICP1-ICPn) of said object movement network (RDN) having associated with it a traffic information unit (TIU1-TIUy) adapted at least to detect the arrival of objects (C1-Cx) at the path point (ICP1-ICPn) and to output a corresponding object arrival information (VAI1-VAIy), including a transmission device (TR) adapted to-send respective packets onto a packet routing link to a succeeding target packet control unit on the basis of a respective routing decision in accordance with a predetermined packet routing method used in said packet switched control network (PSCN) for the controlling of said packet traffic;
a reception device (REC) adapted to receive packets from other packet control units (PCU1-PCUn) of said packet switched control network (PSCN) and at least one object arrival information (VAI1-VAIy) indicating the arrival of an object (CR1-CRx) at one of said path points (Px;
ICP1-ICPn); and
a synchronisation device (SYNC) adapted to cause the sending of a packet corresponding to said object to the packet control unit (Rx) corresponding to said path point (Px) at which the object arrival was detected by its associated traffic information unit.
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Accused Products
Abstract
The invention relates to packet control units, a traffic management system (TMSYS) and a method for managing in a network (RDN) the object traffic formed on a physical layer (PL). In the physical layer (PL) these objects move along path sections between individual path points (Px, Pa, Pb, Pc). The traffic management system comprises a packet switched control network (PSCN) including said packet control units (Rx, Ra, Rb, Rc) on a traffic control layer (TCL) in which packets moving along packet routing links between packet control units (Rx, Ra, Rb, Rc) simulate the movement of corresponding objects in the physical layer (PL). If the arrival of an object (C) is detected at a path point (e.g. Px) and the arrival of a corresponding packet is not detected at a packet control unit (Rx) corresponding to the path point (Px), a synchronisation device (SYNC) in a packet control unit (e.g. Ra) causes the sending of a packet corresponding to the object to the packet control unit (Rx) corresponding to the path point (Px) at which the object (C) has arrived. Thus, out of synchronisation states between the packet routing and object movement can be avoided. The invention is particularly useful for managing the vehicle traffic of vehicles moving along roads in a road network.
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Citations
15 Claims
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1. A packet control unit (Ra, Rb, Rc, Rd;
- PCU1-PCUn) for being included in a packet switched control network (PSCN) as one of a plurality of packet control units for controlling a packet traffic constituted by a plurality of packets (CP1-CPx) being routed between said packet control units along a plurality of packet routing links (PRL1-PRLm),
said packet switched control network (PSCN) being configured in such a way that said packet routing links (PRL1-PRLm) and said packet control units (Ra, Rb;
PCU1-PCUn) respectively correspond to path sections (RDS1-RDSm) and path points (ICP1-ICPn) of an object movement network (RDN) in which an object traffic is formed by a plurality of objects (C1-Cx) moving along said path sections (RDS1-RDSm) between said path points (ICP1-ICPn), andeach path point (ICP1-ICPn) of said object movement network (RDN) having associated with it a traffic information unit (TIU1-TIUy) adapted at least to detect the arrival of objects (C1-Cx) at the path point (ICP1-ICPn) and to output a corresponding object arrival information (VAI1-VAIy), including a transmission device (TR) adapted to-send respective packets onto a packet routing link to a succeeding target packet control unit on the basis of a respective routing decision in accordance with a predetermined packet routing method used in said packet switched control network (PSCN) for the controlling of said packet traffic;
a reception device (REC) adapted to receive packets from other packet control units (PCU1-PCUn) of said packet switched control network (PSCN) and at least one object arrival information (VAI1-VAIy) indicating the arrival of an object (CR1-CRx) at one of said path points (Px;
ICP1-ICPn); and
a synchronisation device (SYNC) adapted to cause the sending of a packet corresponding to said object to the packet control unit (Rx) corresponding to said path point (Px) at which the object arrival was detected by its associated traffic information unit. - View Dependent Claims (4, 6, 7, 8, 10, 11, 12, 13, 14)
- PCU1-PCUn) for being included in a packet switched control network (PSCN) as one of a plurality of packet control units for controlling a packet traffic constituted by a plurality of packets (CP1-CPx) being routed between said packet control units along a plurality of packet routing links (PRL1-PRLm),
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2. A packet control unit (Rx;
- PCU1-PCUn) for being included in a packet switched control network (PSCN) as one of a plurality of packet control units for controlling a packet traffic constituted by a plurality of packets (CP1-CPx) being routed between said packet control units along a plurality of packet routing links (PRL1-PRLm),
said packet switched control network (PSCN) being configured in such a way that said packet routing links (PRL1-PRLm) and said packet control units (Ra, Rb;
PCU1-PCUn) respectively correspond to path sections (RDS1-RDSm) and path points (ICP1-ICPn) of an object movement network (RDN) in which an object traffic is formed by a plurality of objects (C1-Cx) moving along said path sections (RDS1-RDSm) between said path points (ICP1-ICPn), andeach path point (ICP1-ICPn) of said object movement network (RDN) having associated with it a traffic information unit (TIU1-TIUy) adapted at least to detect the arrival of objects (C1-Cx) at the path point (ICP1-ICPn) and to output a corresponding object arrival information (VAI1-VAIy), including a transmission device (TR) adapted to send respective packets onto a packet routing link to a succeeding target packet control unit on the basis of a respective routing decision in accordance with a predetermined packet routing method used in said packet switched control network (PSCN) for the controlling of said packet traffic;
a reception device (REC) adapted to receive packets from other packet control units (PCU1-PCUn) of said packet switched control network (PSCN) and an object arrival information (VAI1-VAIy) indicating the arrival of an object (CR1-CRx) at the path point (Px;
ICP1-ICPn) corresponding to said packet control unit (Rx); and
a synchronisation device (SYNC) adapted to cause the sending of a packet corresponding to said object to the packet control unit (Rx) if a received object arrival information indicates the arrival of an object (CR1-CRx) at the path point (Px;
ICP1-ICPn) corresponding to said packet control unit (Rx),said reception device (REC) being also adapted to receive said sent packet corresponding to said object. - View Dependent Claims (5)
- PCU1-PCUn) for being included in a packet switched control network (PSCN) as one of a plurality of packet control units for controlling a packet traffic constituted by a plurality of packets (CP1-CPx) being routed between said packet control units along a plurality of packet routing links (PRL1-PRLm),
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3. A packet control unit (Ra, Rb;
- PCU1-PCUn) for being included in a packet switched control network (PSCN) as one of a plurality of packet control units for controlling a packet traffic constituted by a plurality of packets (CP1-CPx) being routed between said packet control units along a plurality of packet routing links (PRL1-PRLm),
said packet switched control network (PSCN) being configured in such a way that said packet routing links (PRL1-PRLm) and said packet control units (Ra, Rb;
PCU1-PCUn) respectively correspond to path sections (RDS1-RDSm) and path points (ICP1-ICPn) of an object movement network (RDN) in which an object traffic is formed by a plurality of objects (C1-Cx) moving along said path sections (RDS1-RDSm) between said path points (ICP1-ICPn), andeach path point (ICP1-ICPn) of said object movement network (RDN) having associated with it a traffic information unit (TIU1-TIUy) adapted at least to detect the arrival of objects (C1-Cx) at the path point (ICP1-ICPn) and to output a corresponding object arrival information (VAI1-VAIy), including a transmission device (TR) adapted to send respective packets onto a packet routing link to a succeeding target packet control unit on the basis of a respective routing decision in accordance with a predetermined packet routing method used in said packet switched control network (PSCN) for the controlling of said packet traffic;
a reception device (REC) adapted to receive packets from other packet control units (PCU1-PCUn) of said packet switched control network (PSCN) and object arrival information (VAI1-VAIy) indicating the arrival of objects (CR1-CRx) at one or more path points (Px;
ICP1-ICPn); and
a synchronisation device (SYNC) adapted to delete a packet in said packet control unit (Ra;
Rb) if an object arrival information (VAI1-VAIy) indicating the arrival of an object corresponding to said packet at a path point (Pb) is not received within a predetermined time interval (p1-p2) by said reception device (REC). - View Dependent Claims (9)
- PCU1-PCUn) for being included in a packet switched control network (PSCN) as one of a plurality of packet control units for controlling a packet traffic constituted by a plurality of packets (CP1-CPx) being routed between said packet control units along a plurality of packet routing links (PRL1-PRLm),
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15. A method for managing in a network (RDN) the object traffic formed, on a physical layer (PL), by
a1) a plurality of objects (C1-Cx) moving along a2) a plurality of path sections (RDS1-RDSm) of the network (RDN) and a3) a plurality of path points (ICP1-ICPn) located at said path sections (RDS1-RDSm) of the network (RDN), a4) each path point (ICP1-ICPn) having associated with it a traffic information unit (TIU1-TIUy) adapted at least to detect the arrival of objects (C1-Cx) at the respective path point (ICP1-ICPn) and to output a corresponding object arrival information (VAI1-VAIy), by controlling in a packet switched control network (PSCN) on a traffic control layer (TCL) the packet traffic constituted by b1) a plurality of packets (CP1-CPx) being routed along b2) a plurality of packet routing links (PRL1-PRLm) by means of b3) a plurality of packet control units (PCU1-PCUn) located at said packet routing links (PRL1-PRLm); -
b4) each packet control unit being adapted to send as a source packet control unit respective packets onto a packet routing link to a succeeding target packet control unit on the basis of a respective routing decision in accordance with a predetermined packet routing method used in said packet switched control network (PSCN) for the controlling of said packet traffic;
wherein said packet switched control network (PSCN) on the traffic control layer (TCL) is configured in such a way that c1) packet routing links (PRL1-PRLm) correspond to path sections (RDS1-RDSm); and
c2) packet control units (PCU1-PCUn) correspond to path points (ICP1-ICPn); and
wherein said controlling of said packet control unit is performed in such a way thatc3) each packet (CP1-CPx) routed along a respective packet routing link (PRL1-PRLm) corresponds to one object (CR1-CRx) moving on a corresponding path section (RDS1-RDSm);
comprising the following steps;
detecting an object arrival at one of said path points (Px;
ICP1-ICPn) and generating a corresponding object arrival information (VAI1-VAIy); and
causing a packet control unit to send a packet corresponding to said object to the packet control unit (Rx) corresponding to said path point (Px) at which the object arrival was detected.
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Specification