Blind scheduling apparatus and method in a mobile communication system
A system and a method minimize power consumption, signalling overhead, and processing load in blind scheduling in a mobile communication system. A User Equipment (UE) detects a type of an uplink (UL) grant while it is periodically allocated the UL grant. If there is no data to transmit using the UL grant, the UE determines whether to transmit a padding Medium Access Control (MAC) Protocol Data Unit (PDU) to an Evolved Universal Terrestrial Radio Access Network (E-UTRAN) Node B (eNB) using the UL grant according to the type of the UL grant.
1. A method for communicating at a terminal in a communication system, the method comprising:
receiving, from a higher layer, information related to an uplink resource;
identifying whether there is no data to be transmitted based on the uplink resource;
identifying a type of the uplink resource; and
determining not to generate a medium access (MAC) protocol data unit (PDU) based on identifying (i) that there is no data to be transmitted and (ii) the type of the uplink resource,
wherein the type of the uplink resource comprises a first type mapped to a cell radio network temporary identifier (C-RNTI) associated with a configured uplink grant.
2. The method of claim 1 , further comprising:
receiving a radio resource control (RRC) message comprising information related to a period of the first type and the C-RNTI.
3. The method of claim 1 , wherein the type of the uplink resource comprises a second type related to an uplink grant operated based on the uplink resource received on a physical downlink control channel (PDCCH).
4. The method of claim 1 , wherein when the type of the uplink resource is the first type, the MAC PDU is not transmitted.
5. A terminal in a communication system, the terminal comprising:
a transceiver configured to receive, from a higher layer, information related to an uplink resource; and
a processor configured to identify whether there is no data to be transmitted based on the uplink resource, identify a type of the uplink resource, and determine not to generate a medium access (MAC) protocol data unit (PDU) based on identifying (i) that there is no data to be transmitted and (ii) the type of the uplink resource,
wherein the type of the uplink resource comprises a first type mapped to a cell radio network temporary identifier (C-RNTI) associated with a configured uplink grant.
6. The terminal of claim 5 , wherein the transceiver is configured to receive a radio resource control (RRC) message comprising information related to a period of the first type, and the C-RNTI.
7. The terminal of claim 5 , wherein the type of the uplink resource comprises a second type related to an uplink grant operated based on the uplink resource received on a physical downlink control channel (PDCCH).
8. The terminal of claim 5 , wherein when the type of the uplink resource is the first type, the MAC PDU is not transmitted.
9. A method for communicating at a base station (BS) in a communication system, the method comprising:
allocating a uplink resource to a terminal;
transmitting, to the terminal, information related to the uplink resource; and
receiving, from the terminal, a medium access (MAC) protocol data unit (PDU), wherein the MAC PDU is transmitted by the terminal in consideration of a type of the uplink resource and whether there is no data to be transmitted based on the uplink resource,
wherein a type of the uplink resource comprises a first type mapped to a cell radio network temporary identifier (C-RNTI) associated with a configured uplink grant.
10. The method of claim 9 , further comprising:
transmitting, to the terminal, a radio resource control (RRC) message comprising information related to a period of the first type and the C-RNTI.
11. The method of claim 9 , wherein the type of the uplink resource comprises a second type related to an uplink grant operated based on the uplink resource received on a physical downlink control channel (PDCCH).
12. The method of claim 9 , wherein when the type of the uplink resource is the first type, a medium access (MAC) protocol data unit (PDU) is not transmitted.
13. A base station (BS) for communicating in a communication system, the BS comprising:
a processor configured to allocate a uplink resource to a terminal; and
a transceiver configured to:
transmit, information related to the uplink resource, and
receive, from the terminal, a medium access (MAC) protocol data unit (PDU), wherein the MAC PDU is transmitted by the terminal in consideration of a type of the uplink resource and whether there is no data to be transmitted based on the uplink resource,
wherein a type of the uplink resource comprises a first type mapped to a cell radio network temporary identifier (C-RNTI) associated with a configured uplink grant.
14. The BS of claim 13 , wherein the transceiver is configured to transmit, to the terminal, a radio resource control (RRC) message comprising information related to a period of the first type and the C-RNTI.
15. The BS of claim 13 , wherein the type of the uplink resource comprises a second type related to an uplink grant operated based on the uplink resource received on a physical downlink control channel (PDCCH).
16. The BS of claim 13 , wherein when the type of the uplink resource is the first type, a medium access (MAC) protocol data unit (PDU) is not transmitted.