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Methods and apparatus for providing an interactive cell broadcast service
| Details |
Inventors: Lietsalmi, Mikko; Vanttila, Jaakko; Alanara, Seppo;
Assignee: Nokia Mobile Phones Ltd. (Espoo, FI)
Primary Examiner: Trost; William
Assistant Examiner: Ferguson; Keith
Attorney, Agent or Firm: Harrington & Smith, LLP
A method is disclosed for operating a cellular communications system of a type that comprises a Base Station/Mobile Switching Center/Internetworking function (BMI) and a plurality of mobile stations. The method includes the steps of transmitting a point-to-multipoint message (e.g., a Broadcast SMS message) from the BMI to the plurality of mobile stations; and, in at least some of the plurality of mobile stations, receiving the point-to-multipoint message and transmitting an acknowledgement to the BMI using a point-to-point message. The point-to-multipoint message includes an information element having a value for specifying one of (a) that a mobile station receiving the message is prohibited from responding to the message, (b) that a mobile station receiving the message must respond to the message, and (c) that a mobile station receiving the message may optionally respond to the message. Mobile stations receiving the message selectively respond or not respond to the message, at least as a function of the value of the information element. |
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DETAILED DESCRIPTION The foregoing and other problems are overcome and the objects of the invention are realized by methods and apparatus in accordance with embodiments of this invention.
A method of this invention is disclosed for operating a cellular communications system of a type that comprises a Base Station/Mobile Switching Center/Interworking function (BMI) and a plurality of mobile stations.
The method includes the steps of transmitting a point-to-multipoint message (e.
g.
, a Broadcast SMS message) from the BMI to the plurality of mobile stations; and, in at least some of the plurality of mobile stations, receiving the point-to-multipoint message and transmitting an acknowledgement to the BMI using a point-to-point message.
The point-to-multipoint message includes an information element having a value for specifying one of (a) that a mobile station receiving the message is prohibited from responding to the message, (b) that a mobile station receiving the message must respond to the message, and (c) that a mobile station receiving the message may optionally respond to the message.
Mobile stations receiving the message selectively respond or not respond to the message, at least as a function of the value of the information element.
The method further includes an initial step of transmitting a message to the plurality of mobile stations, the message including an information element for specifying that the BMI is capable of transmitting a point-to-multipoint message.
In one embodiment of this invention the step of responding includes a step of generating and transmitting a manual acknowledgement message, while in another embodiment the step of responding includes a step of originating a call to a telephone number that forms a portion of the point-to-multipoint message.
In a preferred embodiment of this invention the steps of transmitting and responding each use an R-Data message or equivalent, as especified in IS-136 or similar air interface standards.
The use of this invention enables a network operator to poll a plurality of mobile stations, at a cell level or higher (e
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