Legal claims defining the scope of protection, as filed with the USPTO.
1. A method of managing a multicast and broadcast service (MBS) resource in a terminal, the method comprising: receiving a system configuration descriptor (SCD) message from a base station, the SCD message including zone allocation information of sub-bands that are divided into a plurality of zones; receiving an MBS configuration message from the base station, the MBS configuration message including configuration information for an MBS operation and a lifetime of the configuration information during which the configuration information remains valid; subsequently receiving a new SCD message that includes new zone allocation information different from the zone allocation information in the previously-received SCD message; comparing a time at which the new SCD message is received with the lifetime in the MBS configuration message; upon determining that the receipt time of the new SCD message is within the lifetime, receiving a MBS using the configuration information; and upon determining that the receipt time of the new SCD message is after the lifetime expires, receiving a new MBS configuration message including new configuration information and new lifetime during which the new configuration information remains valid, and applying the new zone allocation information at the beginning of a first MBS scheduling interval (MSI) within the new lifetime, and receiving a MBS using the new configuration information.
2. The method of claim 1 , wherein the plurality of zones include at least one zone for at least one MBS zone and a zone for a unicast.
3. The method of claim 1 , wherein each of the SCD message and the new SCD message further includes a flag representing that the plurality of zones include a zone for the unicast.
4. The method of claim 1 , wherein the SCD message further includes a count that is incremented when a content of the SCD message is changed.
5. The method of claim 4 , further comprising checking a change of the zone allocation information based on the count of the SCD message.
6. The method of claim 1 , wherein receiving the new MBS configuration message includes receiving the new MBS configuration message at a time that the lifetime of the previously-received MBS configuration message indicates.
7. The method of claim 1 , wherein the zone allocation information includes a bitmap including bits, each of which is set to ‘1’ when two adjacent sub-bands corresponding to said each bit correspond to different zones.
8. The method of claim 1 , wherein the first MSI includes a plurality of superframes, and the new SCD message further includes information on a length of the first MSI.
9. A method of managing a multicast and broadcast service (MBS) resource in a base station, the method comprising: transmitting a system configuration descriptor (SCD) message to a terminal, the SCD message including zone allocation information of sub-bands that are divided into a plurality of zones; periodically transmitting an MBS configuration message to a terminal, the MBS configuration message including configuration information for an MBS operation and a lifetime of the configuration information; upon detecting a change of the zone allocation information, determining whether the lifetime of the configuration information included in the MBS configuration message transmitted prior to the detecting time has expired; upon determining that the lifetime has expired, transmitting another SCD message including the changed zone allocation information; and upon determining that the lifetime has not expired, applying the changed zone allocation information after the expiration of the lifetime and until the transmission of a subsequent MBS configuration message, including applying the changed zone allocation information at the beginning of a first MBS scheduling interval (MSI) of a new lifetime indicated in the subsequent MBS configuration message.
10. The method of claim 9 , wherein the plurality of zones include at least one zone for at least one MBS zone and a zone for a unicast.
11. The method of claim 10 , wherein each of the SCD message and the another SCD message further includes a flag representing that the plurality of zones include the zone for the unicast.
12. The method of claim 9 , wherein the SCD message further includes a count that is incremented when a content of the SCD message is changed.
13. The method of claim 9 , wherein the zone allocation information includes a bitmap including bits, each of which is set to ‘1’ when two adjacent sub-bands corresponding to said each bit correspond to different zones.
14. The method of claim 9 , wherein the first MSI includes a plurality of superframes, and the another SCD message further includes information on a length of the first MSI.
15. An apparatus for managing a multicast and broadcast service (MBS) resource in a terminal, the apparatus comprising: a receiver configured to periodically receive a system configuration descriptor (SCD) message including zone allocation information of sub-bands that are divided into a plurality of zones, and to receive an MBS configuration message including configuration information for an MBS operation and a lifetime during which the configuration information remains valid; and a controller configured to, upon detecting that the zone allocation information of a received SCD message is changed, compare a time at which the SCD message is received with the lifetime in the received MBS configuration message; upon determining that the receipt time of the SCD message is within the lifetime, control the receiver to receive a MBS using the configuration information; and upon determining that the receipt time of the SCD message is after the lifetime expires, control the receiver to receive a new MBS configuration message including new configuration information and new lifetime during which the new configuration information remains valid, and apply the changed zone allocation information at the beginning of a first MBS scheduling interval (MSI) of the new MBS configuration message.
16. The apparatus of claim 15 , wherein the plurality of zones include at least one zone for at least one MBS zone and a zone for a unicast.
17. The apparatus of claim 15 , wherein the SCD message further includes a count that is incremented when a content of the SCD message is changed, and the controller checks a change of the zone allocation information based on the count of the SCD message.
18. An apparatus for managing a multicast and broadcast service (MBS) resource in a base station, the apparatus comprising: a transmitter configured to periodically transmit a system configuration descriptor (SCD) message including zone allocation information of sub-bands that are divided into a plurality of zones, and to periodically transmit an MBS configuration message including configuration information for an MBS operation and a lifetime of the configuration information; and a controller configured to, upon detecting a change of zone allocation, determine whether the lifetime of the configuration information included in a MBS configuration message transmitted prior to the detecting time has expired; and upon determine that the lifetime has not expired, apply changed zone allocation information after the expiration of the lifetime and until the transmission of a subsequent MBS configuration message, including applying the changed zone allocation information at the beginning of a first MBS scheduling interval (MSI) of a new lifetime indicated in the subsequent MBS configuration message.
19. The apparatus of claim 18 , wherein the plurality of zones include at least one zone for at least one MBS zone and a zone for a unicast.
20. The apparatus of claim 18 , wherein the SCD message further includes a count that is incremented when a content of the SCD message is changed.
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February 23, 2016
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