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Method and a system for scheduling the downlink in long term evolution (LTE) networks based on quality of service (QoS)

  • US 9,565,697 B2
  • Filed: 02/20/2013
  • Issued: 02/07/2017
  • Est. Priority Date: 02/28/2012
  • Status: Active Grant
First Claim
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1. A method for scheduling downlink in a radio access network based on a Quality of Service (QoS), the method comprising:

  • performing a packet scheduling for a plurality of user equipments (UEs) based on information regarding QoS classes, the information regarding the QoS classes being included in QoS class identifiers received from an Evolved Packet Core (EPC) providing communication services to the UEs, wherein the QoS class identifiers comprise at least two of a resource type, including Guaranteed Bit Rate (GBR) and Non-GBR bearer, a priority, a Packet Delay Budget, and a Packet Error Loss Rate, and wherein the packet scheduling maximizes a number of the UEs fulfilling QoS parameters in the radio access network, by performing steps comprising;

    defining a quality performance indicator Qi and a target quality TQQCI_m for each of the QoS classes, the quality performance indicator Qi including the information regarding the QoS classes with a packet delay for delay-dependent services or data rate for elastic services, and the target quality TQQCI_m including the information regarding the QoS classes with a Packet Delay Budget for the delay-dependent services or a minimum data rate for the elastic services;

    defining a metric QQCI_m that depends on a type of services that are carried including delay-dependent or best-effort services for each one of the QoS classes measuring if performance of the number of UEs fulfills a quality performance target of the UEs;

    including a factor in a priority of a UE mapped onto a QoS class supporting a delay-dependent traffic, the factor comprising

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