RU2020140410A - DEVICE AND METHOD FOR OBTAINING PERIODICALLY BROADCASTED SYSTEM INFORMATION IN WIRELESS COMMUNICATION - Google Patents

Claims (30)

1. User equipment that communicates with a radio access network (RAN) base station device over an air interface, the user equipment comprising: a processor circuit configured to initiate a first type system information block (SIB) acquisition process to receive the first type SIB, the first type SIB including: scheduling information for a second type SI message, the second type SI message comprising at least one system information block (SIB); and an indication of a broadcast state for a second type SI message, the indication indicating a broadcast; a receiver circuit configured to receive the first type SIB; and a processor circuit, further configured to initiate an SI message acquisition process to receive the SI message; and in the event that the stored version of one of the at least one SIB of the second type is not valid, the process of obtaining the SIB of the first type is initiated on failure in the process of obtaining the SI message. 2. The user equipment of claim 1, wherein the processor circuitry is further configured to re-initiate the SI message acquisition process in response to the initiation of the first type SIB acquisition process when the SI message acquisition process fails. 3. A method for user equipment that communicates with a radio access network (RAN) base station device over an air interface, the method comprising: initiating a first type system information block (SIB) acquisition process to receive the first type SIB, the first type SIB including: scheduling information for a system information (SI) message, the SI message comprising at least one SIB of the second type; and a broadcast state indication for the SI message, the indication indicating a broadcast; reception of SIB of the first type; and initiating the process of receiving the SI message to receive the SI message, while in the event that the stored version of one of the at least one SIB of the second type is not valid, the process of obtaining the SIB of the first type is initiated on failure in the process of obtaining the SI message. 4. The method of claim 3, further comprising re-initiating the SI message acquisition process in response to initiating the first type SIB acquisition process when the SI message acquisition process fails. 5. A radio access network (RAN) base station device that communicates with user equipment over an air interface, the base station device comprising: a transmitter circuit configured to transmit a first type system information block (SIB), wherein the first type SIB includes: scheduling information for a system information (SI) message, the SI message comprising at least one SIB of the second type; a broadcast state indication for the SI message, the indication indicating a broadcast; a processor circuit configured to use a transmitter circuit to broadcast the SI message, wherein if the user equipment fails to receive the SI message during the process of receiving the SI message, the user equipment reacquires the first type SIB if the version of one of the at least one second type SIB stored in the user equipment is invalid. 6. The base station apparatus of claim 5, wherein the first type SIB reacquired by the user equipment is used by the user equipment to re-initiate the SI message acquisition process. 7. A method for a radio access network (RAN) base station device that communicates with user equipment over an air interface, including: transmission of a system information block (SIB) of the first type, and the SIB of the first type includes: scheduling information for a system information (SI) message, the SI message comprising at least one SIB of the second type; and an indication of a broadcast state for a second type SI message, the indication indicating a broadcast; broadcasting the SI message; wherein if the user equipment fails to receive the SI message during the process of receiving the SI message, the user equipment reacquires the first type SIB if the version of one of the at least one second type SIB stored in the user equipment is invalid. 8. The method of claim 7, wherein the first type SIB reacquired by the user equipment is used by the user equipment to re-initiate the SI message acquisition process.