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MOBILE COMMUNICATION METHOD AND EXCHANGE

  • US 20100279692A1
  • Filed: 10/02/2008
  • Published: 11/04/2010
  • Est. Priority Date: 10/02/2007
  • Status: Active Grant
First Claim
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1. A mobile communication method in which, during handover of a mobile station, an exchange including a first protocol function to function as a first protocol and a second protocol function to function as a second protocol being a lower layer than the first protocol transmits a second protocol message containing a first protocol message to radio base stations each including a second protocol function to function as the second protocol, and each of the radio base stations transmits the first protocol message to the mobile station including a first protocol function to terminate the first protocol, the mobile communication method comprising the steps of:

  • transmitting, from the first protocol function of the exchange to the second protocol function of the exchange, a first protocol layer message;

    transmitting, from the second protocol function of the exchange to a handover source radio base station, the second protocol message containing the first protocol message;

    transmitting, from the second protocol function of the exchange to the first protocol function of the exchange, a retransmission request for the first protocol layer message, when receiving a notification, which indicates completion of the handover of the mobile station, from a handover target radio base station, after receiving a second protocol response message, which indicates that transfer of the first protocol message to the mobile station through a radio interface has failed, from the handover source radio base station;

    retransmitting, from the first protocol function of the exchange to the second protocol function of the exchange, the first protocol layer message, in response to the retransmission request; and

    retransmitting, from the second protocol function to the handover target radio base station, the second protocol message containing the first protocol message.

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