Method and apparatus for processing scheduling information in mobile communication system
A method and an apparatus for processing scheduling information in a terminal into which a plurality of forward carriers and reverse carriers are aggregated are provided. The method includes receiving a control message from a base station, the control message including information on a reverse carrier added by the carrier aggregation, and determining a new buffer state table to be used for reporting the state of buffers to the base station, based on the information included in the control message.
1. A method of transmitting a buffer state report (BSR) by a user equipment (UE), the method comprising:
determining whether a BSR is triggered;
selecting a long BSR in case more than one logical channel group (LCG) has data available for transmission;
determining a first buffer status (BS) table corresponding to the long BSR from at least two BS tables based on a buffer size identifying an amount of data available across all logical channels of the more than one LCG;
selecting a short BSR in case only one LCG has data available for transmission;
determining a second BS table corresponding to the short BSR from at least two BS tables based on a buffer size identifying an amount of data available across all logical channels of the only one LCG;
determining a BS index from the determined first BS table or the determined second BS table; and
transmitting the BSR including the determined BS index,
wherein a specific field of a medium access control (MAC) subheader of the BSR is set to a predetermined value indicating the determined first BS table or the determined second BS table, and
wherein the long BSR includes more than one LCG identifier.
2. The method of claim 1 , wherein the determining of the BS index from the determined first BS table or the determined second BS table further comprises:
determining the BS index from the determined first BS table or the determined second BS table based on amount of data available for transmission of each LCG.
3. The method of claim 2 , wherein the MAC subheader included in a MAC packet data unit (PDU).
4. The method of claim 3 , wherein the MAC PDU further includes a logical channel identifier (LCID) for indicating at least one of the long BSR, the short BSR or a truncated BSR.
5. The method of claim 1 , further comprising:
receiving a control message for the BSR, from a base station,
wherein the control message is a radio resource control (RRC) message.
6. A method of receiving a buffer state report (BSR) by a base station, the method comprising:
transmitting, to a user equipment (UE), a control message for the BSR;
receiving the BSR including a BS index and a predetermined value indicating a first buffer status (BS) table corresponding the BS index in case more than one logical channel group (LCG) has data available for transmission;
receiving the BSR including a BS index and a predetermined value indicating a second BS table corresponding the BS index in case only one LCG has data available for transmission; and
identifying the first BS table or the second BS table based on the predetermined value,
wherein the predetermined value indicating the first BS table or the second BS table is included in a specific field of a medium access control (MAC) subheader of the BSR,
wherein the BSR includes a long BSR or a short BSR, and
wherein the long BSR includes more than one LCG identifier.
7. The method of claim 6 , the BS index is determined based on amount of data available for transmission of each LCG.
8. The method of claim 7 , wherein the MAC subheader included in a MAC packet data unit (PDU).
9. The method of claim 8 ,
wherein the MAC PDU further includes a logical channel identifier (LCD) indicating a type of the BSR, and
wherein the type of the BSR comprises at least one of a long BSR, a short BSR or a truncated BSR.
10. The method of claim 6 , wherein the control message is a radio resource control (RRC) message.
11. A user equipment (UE) transmitting a buffer state report (BSR), the UE comprising:
a transceiver; and
a processor coupled with the transceiver and configured to
determine whether a BSR is triggered,
select a long BSR in case more than one logical channel group (LCG) has data available for transmission,
determine a first buffer status (BS) table corresponding to the long BSR from at least two BS tables based on a buffer size identifying an amount of data available across all logical channels of the more than one LCG,
select a short BSR in case only one LCG has data available for transmission,
determine a second BS table corresponding to the short BSR from at least two BS tables based on a buffer size identifying an amount of data available across all logical channels of the only one LCG,
determine a BS index from the determined first BS table or the determined second BS table, and
transmit the BSR including the determined BS index,
wherein a specific field of a medium access control (MAC) subheader of the BSR is set to a predetermined value indicating the determined first BS table or the determined second BS table, and
wherein the long BSR includes more than one LCG identifier.
12. The UE of claim 11 , wherein the processor is further configured to determine the BS index from the determined first BS table or the determined second BS table based on amount of data available for transmission of each LCG.
13. The UE of claim 12 , wherein the MAC subheader included in a MAC packet data unit (PDU).
14. The UE of claim 13 , wherein the MAC PDU further includes a logical channel identifier (LCD) for indicating at least one of a long BSR, a short BSR or a truncated BSR.
15. The UE of claim 11 , wherein the processor is further configured to receive a control message for the BSR, from a base station, wherein the control message is a radio resource control (RRC) message.
16. A base station receiving a buffer state report (BSR), the base station comprising:
a transceiver; and
a processor coupled with the transceiver and configured to:
transmit, to a user equipment (UE), a control message for the BSR,
receive the BSR including a BS index and a predetermined value indicating a first buffer status (BS) table corresponding the BS index in case more than one logical channel group (LCG) has data available for transmission,
receive the BSR including a BS index and a predetermined value indicating a second BS table corresponding the BS index in case only one LCG has data available for transmission, and
identify the first BS table or the second BS table based on the predetermined value,
wherein the predetermined value indicating the first BS table or the second BS table is included in a specific field of a medium access control (MAC) subheader of the BSR,
wherein the BSR includes a long BSR or a short BSR, and
wherein the long BSR includes more than one LCG identifier.
17. The base station of claim 16 , the BS index is determined based on amount of data available for transmission of each LCG.
18. The base station of claim 17 , wherein the MAC subheader included in a MAC packet data unit (PDU).
19. The base station of claim 18 ,
wherein the MAC PDU further includes a logical channel identifier (LCD) indicating a type of the BSR, and
wherein the type of the BSR comprises at least one of a long BSR, a short BSR or a truncated BSR.
20. The base station of claim 16 , wherein the control message is a radio resource control (RRC) message.