Layered multicast and fair bandwidth allocation and packet prioritization

摘要

Embodiments include an overlay multicast network. The overlay multicast network may provide a set of features to ensure reliable and timely arrival of multicast data. The embodiments include a congestion control system that may prioritize designated layers of data within a data stream over other layers of the same data stream. Each data stream transmitted over the network may be given an equal share of the bandwidth. Addressing in routing tables maintained by routers may utilize summarized addressing based on the difference in location of the router and destination address. Summarization levels may be adjusted to minimize travel distances for packets in the network. Data from high priority data stream layers may also be retransmitted upon request from a destination machine to ensure reliable delivery of data.

主权项

1. A method for generating an output stream of data, the method comprising:
receiving a stream of input data comprising a sequence of data packets representing market price information of a set of traded goods, each unique traded good in the set of traded goods associated with a unique element indicator, wherein each data packet in the sequence of data packets includes an element indicator relating the data packet with a particular traded good in the set of traded goods, and wherein each data packet of the sequence of data packets includes a sequence indicator corresponding to an order within the stream that the data packet was received; storing each of the data packets in a circular buffer based upon the element indicator included with the data packet, wherein a received data packet having a same element indicator as a previously received data packet already present in the circular buffer is stored by replacing the previously received data packet having the same element indicator if the sequence indicator indicates that the received data packet is more recently received than the existing data packet, and wherein a received data packet having an element indicator not already present in a packet already stored in the circular buffer is stored in a new position in the circular buffer; and sequentially extracting each packet from the circular buffer to form the output stream of data for delivery to one or more users.