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Method of routing a short message and an apparatus for routing a short message

  • US 6,442,159 B2
  • Filed: 04/21/1998
  • Issued: 08/27/2002
  • Est. Priority Date: 04/22/1997
  • Status: Expired due to Term
First Claim
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1. A method of routing a short message with high or low priority from a service center to a mobile station in a public land mobile network providing both packet data service and circuit switched service, comprising the steps of:

  • a) making a choice, in advance, as to whether the short message should be received by the mobile station either via a specific one of packet data service or circuit switched service, or by either packet data service or circuit switched service;

    b) based upon said choice in step a), the priority of the short message sent from the service center, and an indication of whether the mobile station is reachable via one, both or neither the packet data or circuit switched services, selecting a route via one of the services, a route via both services, or no route all, c) if a route via one of the services is selected in step b), routing the short message in accordance with the selected route, d) if a route via both services is selected in step b), selecting the route via the service having a higher preference that the other service, and routing the short message in accordance with the route via said service having the higher performance, e) if the routing of the short message to the mobile station is unsuccessful via the route via said service having the higher preference, as selected in step d), routing the short message in accordance with the route via said other service having lower preference.

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