Low delay and low loss packet switch
AssigneeKoninklijke Philips Electronics N.V.
InventorFrederik Carel Schoute
Life of this patent
Estimating the term…
Abstract
In a telecommunication switching arrangement where data packets have multi-level indices associated with the loss and delay aspects of the data packet, a mathematical operation on the indices allows the switching arrangement to assign data packets to groups. The sequence in which the data packets are transmitted by the switching arrangement is based on the group to which the data packet belongs. This effectively results in a relative prioritization of the data packets. Additionally, the loss and delay indices determine storage priority and relative priority inside a group. The switching arrangement achieves low loss and low delay for the data packets to be transmitted.
Claims11
Telecommunication switching arrangement (1) for switching digital data contained in data packets (23) provided with a packet header (21), which contains a first (25) and a second index (26) representative of a first and a second priority characteristic of the data packet (23), the arrangement (1) comprising a crosspoint switch (3) for switching packets (23) from a plurality of input lines (5, 7) of the switch (1) to an output line (11) of the switch (1), and a sequencer in the crosspoint switch (3) for determining a sequence in which the data packets (23) are to be switched to the output line (11), and a storage (5) for temporarily storing the data packets (23), characterized in that the sequencer is operative to determine the sequence in which the data packets (23) are to be switched to the output line (11) based on a result of a mathematical operation on the first index (25) and the second index (26).
Method for determining a sequence in which incoming data packets (23) are to be switched from an input line (7, 9) to an output line (11) of a telecommunication switching arrangement (1) where the data packets (23) contain a first (25) and a second index (26) representative of a first and a second priority characteristic of the data packet (23) and where the switching arrangement (1) comprises a storage (5) the method including the following steps:
- receiving a data packet (23) performing a mathematical operation on the first (25) and the second index (26) determining a sequence in which the data packets (23) are to be switched to the output line (11) based on the result of the mathematical operation.
Telecommunication switching arrangement for switching digital data in data packets provided with a packet header, which has a first and a second index representative of a first and a second priority characteristic of the data packet, the arrangement comprising a crosspoint switch for switching packets from a plurality of input lines of the switch to an output line of the switch, and a sequencer in the crosspoint switch for determining a sequence in which the data packets are to be switched to the output line, and a storage for temporarily storing the data packets, such tat the sequencer is operative to determine the sequence in which the data packets are to be switched to the output line based on a result of a mathematical operation on the first index and the second index.
Dependencies are inferred from the claim text.