Method and apparatus of handling interest indication in a wireless communication system
Method and apparatus for a user equipment (UE) operating in a serving cell is disclosed. The serving cell does not broadcast system information for broadcast or multicast. The UE transmits an interest indication for broadcast or multicast to the serving cell. The interest indication for broadcast or multicast includes at least some information associated with a broadcast or multicast service of interest. The UE receives the system information for broadcast or multicast from the serving cell after transmitting the interest indication for broadcast or multicast.
1. A method for a user equipment (UE), comprising:
determining by the UE whether a serving cell supports broadcast or multicast service, wherein a system information block (SIB), including one or multiple broadcast multicast service area identities, is not broadcasted in the serving cell prior to the UE providing an interest indication for broadcast or multicast service; and
transmitting in the serving cell by the UE the interest indication for broadcast or multicast service if the serving cell supports broadcast or multicast service, wherein the interest indication by the UE includes at least an identity of a particular broadcast or multicast service of interest, and wherein the UE does not have the SB prior to transmitting the interest indication for broadcast or multicast service,
wherein the interest indication for broadcast or multicast service indicates whether the UE has the SIB.
2. The method of claim 1 , wherein the UE is in RRC_CONNECTED when the UE transmits the interest indication for broadcast or multicast.
3. The method of claim 1 , wherein the UE determines whether the serving cell supports broadcast or multicast service based on content of a periodic message broadcasted by the serving cell.
4. The method of claim 1 , further comprising: receiving the SIB after transmitting the interest indication for broadcast or multicast, if the interest indication for broadcast or multicast indicates the UE does not have the SIB.
5. The method of claim 1 , further comprising: receiving a message after transmitting the interest indication for broadcast or multicast, wherein the message indicates the serving cell does not provide the broadcast or multicast service of interest.
6. The method of claim 1 , further comprising: transmitting a request for the SIB, instead of the interest indication for broadcast or multicast, in the serving cell if the UE does not have the SIB and if the serving cell supports broadcast or multicast service, wherein the UE is not in RRC_CONNECTED.
7. A user equipment (UE) comprising:
a control circuit;
a processor installed in the control circuit;
a memory installed in the control circuit and operatively coupled to the processor;
wherein the processor is configured to execute a program code stored in the memory to perform steps comprising:
determining whether a serving cell supports broadcast or multicast service,
wherein a system information block (SIB), including one or multiple broadcast or multicast service area identities, is not broadcasted in the serving cell prior to the UE providing an interest indication for broadcast or multicast service; and
transmitting in the serving cell the interest indication for broadcast or multicast service if the serving cell supports broadcast or multicast service, wherein the interest indication includes at least an identity of a particular broadcast or multicast service of interest, and wherein the UE does not have the SIB prior to transmitting the interest indication for broadcast or multicast service,
wherein the interest indication for broadcast or multicast service indicates whether the UE has the SIB.
8. The UE of claim 7 , wherein the UE is in RRC_CONNECTED when the UE transmits the interest indication for broadcast or multicast.
9. The UE of claim 7 , wherein the UE determines whether the serving cell supports broadcast or multicast service based on content of a periodic message broadcasted by the serving cell.
10. The UE of claim 7 , wherein the processor is configured to execute a program code stored in the memory to perform steps further comprising: receiving the SIB after transmitting the interest indication for broadcast or multicast, if the interest indication for broadcast or multicast indicates the UE does not have the SIB.
11. The UE of claim 7 , wherein the processor is configured to execute a program code stored in the memory to perform steps further comprising: receiving a message after transmitting the interest indication for broadcast or multicast, wherein the message indicates the serving cell does not provide the broadcast or multicast service of interest.
12. The UE of claim 7 , wherein the processor is configured to execute a program code stored in the memory to perform steps further comprising:
transmitting a request for the SIB, instead of the interest indication for broadcast or multicast, in the serving cell if the UE does not have the SIB and if the serving cell supports broadcast or multicast service, wherein the UE is not in RRC_CONNECTED.