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Mobile communication method, radio access apparatus, and gateway apparatus

  • US 8,849,284 B2
  • Filed: 04/15/2013
  • Issued: 09/30/2014
  • Est. Priority Date: 12/26/2008
  • Status: Expired due to Fees
First Claim
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1. A mobile communication method in which a mobile station receives downlink data from one of a first radio access apparatus within a first radio access network and a second radio access apparatus within a second radio access network, the method comprising the steps of:

  • when a gateway apparatus is switched from a first state where the downlink data is transmitted to the first radio access apparatus to a second state where the downlink data is transmitted to the second radio access apparatus,transferring, from the first radio access apparatus to the second radio access apparatus via GTP-U tunnel, the downlink data received from the gateway apparatus;

    transmitting, from the gateway apparatus to the first radio access apparatus, a End Marker message which is GTP-U message indicating that the last downlink data is transmitted, after the gateway apparatus has transmitted the last downlink data;

    transmitting, from the first radio access apparatus to the second radio access apparatus via GTP-U tunnel, the End Marker message, after the first radio access apparatus has transmitted the last downlink data;

    transmitting, from the second radio access apparatus to the mobile station, transfer downlink data transferred from the first radio access apparatus, before new downlink data transmitted from the gateway apparatus; and

    transmitting, from the second radio access apparatus to the mobile station, the new downlink data, after the second radio access apparatus has received the End Marker message.

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