Signalling in mobile telecommunications

Abstract

In a method for use in a base station of a mobile telecommunications system, primary system information is maintained and is periodically broadcast while secondary system information is broadcast in response to a trigger event.

1 - 20 . (canceled) 
     
     
         21 . A method for controlling a user equipment (UE), the method comprising:
 receiving first system information that is broadcast by a base station, and that comprises scheduling information for on-demand system information,
 wherein the on-demand system information comprises information not broadcast in the first system information; 
   transmitting, to the base station, a request message using the scheduling information,
 wherein the request message is a request for on-demand system information; and 
   receiving the on-demand system information if the request message is received by the base station.   
     
     
         22 . The method according to  claim 21 , wherein the scheduling information comprises information related to periodicity of the on-demand system information. 
     
     
         23 . A user equipment (UE) comprising:
 a transceiver circuit configured to:
 receive first system information that is broadcast by a base station, and that comprises scheduling information for on-demand system information,
 wherein the on-demand system information comprises information not broadcast in the first system information; 
 
 transmit, to the base station, a request message using the scheduling information,
 wherein the request message is a request for on-demand system information; 
 
   and
 receive the on-demand system information if the request message is received by the base station. 
   
     
     
         24 . The UE according to  claim 23 , wherein the scheduling information comprises information related to periodicity of the on-demand system information. 
     
     
         25 . A method for controlling a base station, the method comprising:
 broadcasting first system information that comprises scheduling information for on-demand system information,
 wherein the on-demand system information comprises information not broadcast in the first system information; 
   receiving, from a user equipment (UE), a request message using the scheduling information,
 wherein the request message is a request for on-demand system information; and 
   transmitting the on-demand system information if the request message is received from the UE.   
     
     
         26 . The method according to  claim 25 , wherein the scheduling information comprises information related to periodicity of the on-demand system information. 
     
     
         27 . A base station comprising:
 a transceiver circuit configured to broadcast first system information that comprises scheduling information for on-demand system information,   wherein the on-demand system information comprises information not broadcast in the first system information,   wherein the transceiver circuit is configured to:
 receive, from a user equipment (UE), a request message using the scheduling information,
 wherein the request message is a request for on-demand system information; and 
 
 transmit the on-demand system information if the request message is received from the UE. 
   
     
     
         28 . The base station according to  claim 27 , wherein the scheduling information comprises information related to periodicity of the on-demand system information.