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Congestion measurement and reporting for real-time delay-sensitive applications

  • US 9,516,541 B2
  • Filed: 06/25/2014
  • Issued: 12/06/2016
  • Est. Priority Date: 09/17/2013
  • Status: Active Grant
First Claim
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1. An enhanced node B (eNB) comprising hardware processing circuitry comprising:

  • congestion detection processing circuitry configured to;

    identify a Quality of Service Class Identifier (QCI) delay for each of a plurality of downlink packets;

    determine whether the QCI delay for each of the plurality of downlink packets exceeds a delay threshold;

    determine a start of a congestion period responsive to a start criteria;

    determine an end of the congestion period responsive to a number of consecutive downlink packets that do not exceed the delay threshold reaching a second count threshold;

    determine a length of the congestion period; and

    send a congestion indication message to a core network when the length of the congestion period exceeds a first length threshold; and

    sub-quality of service class identifier (sub-QCI) packet dropping processing circuitry configured to;

    receive, from a user equipment (UE), a first message to initiate sub-QCI packet dropping, the first message comprising a sub-QCI for a QCI;

    identify a sub-QCI packet dropping delay threshold for the sub-QCI;

    test whether a packet belonging to the sub-QCI exceeds the sub-QCI delay threshold; and

    responsive to the packet belonging to the sub-QCI exceeding the delay threshold, make a decision whether to drop the packet belonging to the sub-QCI.

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