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Method and apparatus for establishing cellular session in wireless communication system

  • US 10,021,611 B2
  • Filed: 02/25/2014
  • Issued: 07/10/2018
  • Est. Priority Date: 02/25/2013
  • Status: Active Grant
First Claim
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1. A method for establishing, by an entity of a primary radio access technology (RAT) system, a session in a wireless communication system, the method comprising:

  • receiving a requested routing type for each bearer, a requested routing rule for each bearer, and a measurement result for a secondary RAT system from a multi-RAT device;

    determining which packet data network (PDN) is appropriate for simultaneous transmission through the primary RAT system and the secondary RAT system based on the requested routing type for each bearer, the requested routing rule for each bearer, network load of both the primary RAT system and the secondary RAT system, a quality of service (QoS) of each bearer and the received measurement result;

    transmitting a create session request message to a PDN gateway (P-GW) corresponding to a PDN which is determined to be appropriate for simultaneous transmission through the primary RAT system and the secondary RAT system;

    receiving a create session response message including information on the simultaneous transmission through the primary RAT system and the secondary RAT system from the P-GW; and

    establishing a session of the primary RAT system based on the information on the simultaneous transmission with the multi-RAT device,wherein the QoS includes a quality class identifier (QCI), an allocation and retention priority (ARP), a bit rate of traffic per bearer, and bit rates of traffic per group of bearers.

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