System information indication method and apparatus and communication system
A system information indication method and apparatus and a communication system. In the embodiments of this disclosure, by indicating a correspondence between an area related ID or a system information related index and system information, and/or notifying information on a change of the area related ID or system information related index, a case may be avoided where a UE needs still to obtain system information from a network side when system information of a current cell is stored, thereby efficiently lowering power consumption of the UE in acquiring the system information.
1. A user equipment (UE) comprising:
a memory configured to store a system information block(s);
a receiver configured to receive information on an area related identity (ID) corresponding to a system information block(s) mapping information field (SIB-Mappinginfo field), the area related ID corresponding to a number of a system information block(s); and
processor circuitry configured to:
control to check whether the stored system information block(s) is valid according to the information, and
configure the SIB-Mappinginfo field for the are related identity (ID) in a message broadcast by a network side,
wherein a bit included in the SIB-Mappinginfo field corresponds to a system information block, and the bit indicates that the system information block is associated with the area related ID.
2. The UE according to claim 1 , wherein
the processor circuitry is further configured to:
use the stored system information block(s) when the stored system information block(s) is valid, and
acquire a new system information block(s) to which the area related ID corresponds when the stored system information block(s) is invalid.
3. The user equipment (UE) according to claim 1 , further comprising:
a transmitter configured to transmit, to a network device, a system information request message corresponding to the area related ID.
4. The user equipment (UE) according to claim 3 , further comprising:
the receiver configured to receive, from the network device, a new system information block(s) that is transmitted by the network device according to system information request message.
5. The UE according to claim 1 , wherein
the area related ID corresponds to the number of a system information block(s) in all system information block(s).
6. A network device, comprising:
a memory;
processor circuitry coupled to the memory and is configured to:
transmit information on an area related identity (ID) corresponding to a system information block(s) mapping information field (SIB-Mappinginfo field), the area related ID corresponding to a number of a system information block(s),
cause a user equipment (UE) to check whether a system information block(s) to which the UE is stored is valid according to the information by transmitting the information, and
configure the SIF-Mappinginfo field for the area related identity (ID) in a broadcast message,
wherein a bit included in the SIB-Mappinginfo field corresponds to a system information block, and the bit indicates that the system information block is associated with the area related ID.
7. The network device according to claim 6 , further comprising:
a receiver configured to receive a system information request message transmitted by the UE, the system information request message corresponding to the area related ID.
8. The network device according to claim 7 , wherein
the processor circuitry is further configured to transmit, to the UE, a new system information block(s) device according to the system information request message.
9. A wireless communication system comprising:
a network device configured to:
transmit information on an area related identity (ID) corresponding to a system information block(s) mapping information field (SIB-Mappinginfo field), the area related ID corresponding to a number of a system information block(s), and
configured the SIB-Mappinginfo field for the area related identity (ID) in a broadcast message, wherein a bit included in the SIB-Mappinginfo field corresponds to a system information block, and the bit indicates that the system information block is associated with the area related ID; and
a receiver configured to:
receive the information from the network device, and
control to check whether the stored system information block(s) is valid according to the information.