Control signalling method
According to an exemplary embodiment, a control signalling method in a wireless communications system for reducing false positives, the method comprising: lengthening cyclic redundancy check (CRC) information by assigning at least one predetermined value to at least one downlink control information (DCI) field. As a result, it is possible to reduce the probability of false positive.
1. A communications method implemented in a base station used in a wireless communications system, the communications method comprising:
adding a predetermined value to a downlink (DL) control information (DCI) format notifying time division duplexing (TDD) reconfiguration;
transmitting, to a user equipment, the DCI format comprising a repeated fast TDD configuration indication (FCI),
transmitting, to the user equipment, in a first fixed DL subframe in a radio frame, an indication of an uplink (UL)-DL reconfiguration, and
reconfiguring framing intervals by enabling a user equipment (UE) to operate according to a procedure related to a detected FCI responsive to a detection of the repeated FCI.
2. The communications method as in claim 1 , wherein a cyclic redundancy check (CRC) is scrambled by an enhanced interference management and traffic adaptation (eIMTA)-radio network temporary identifier (RNTI) for the DCI format.
3. The communications method as in claim 1 , wherein the DCI format comprises a DCI format 1C transmitted in a common search space.
4. The communications method as in claim 1 , wherein the indication is in the DCI format.
5. The communications method as in claim 1 , wherein the indication is repeated at an interval.
6. The communications method as in claim 5 , wherein the interval is 10 ms.
7. The communications method as in claim 5 , wherein the interval>10 ms.
8. The communications method as in claim 1 , wherein the user equipment follows a fallback solution if the user equipment is unsuccessful in detecting a physical downlink control channel (PDCCH) with a cyclic redundancy check (CRC) scrambled by an enhanced interference management and traffic adaptation (eIMTA)-radio network temporary identifier (RNTI) for the DCI format.
9. A communications method implemented in a user equipment used in a wireless communications system, the communications method comprising:
receiving from a base station a downlink (DL) control information (DCI) format notifying time division duplexing (TDD) reconfiguration, wherein the DCI format comprises a repeated fast TDD configuration indication (FCI);
wherein a predetermined value is added to the DCI format;
receiving, from the base station, in a first fixed DL subframe in a radio frame, an indication of an uplink (UL)-DL reconfiguration; and
operating according to a procedure related to a detected FCI responsive to a detection of the repeated FCI.
10. A base station used in a wireless communications system, the base station comprising:
a transmitter configured to transmit to a user equipment (UE) a downlink (DL) control information (DCI) format notifying time division duplexing (TDD) reconfiguration, wherein the DCI format comprises a repeated fast TDD configuration indication (FCI),
wherein a predetermined value is added to the DCI format,
wherein the transmitter transmits, to the UE, in a first fixed DL subframe in a radio frame, an indication of an uplink (UL)-DL reconfiguration, and
wherein the base station further reconfigures framing intervals by enabling the UE to operate according to a procedure related to a detected FCI responsive to a detection of the repeated FCI.
11. A user equipment (UE) used in a wireless communications system, the UE comprising:
a receiver to receive from a base station a downlink (DL) control information (DCI) format notifying time division duplexing (TDD) reconfiguration, wherein the DCI format comprises a repeated fast TDD configuration indication (FCI),
wherein a predetermined value is added to the DCI format,
wherein the receiver receives, from the base station, in a first fixed DL subframe in a radio frame, an indication of an uplink (UL)-DL reconfiguration, and
wherein the UE operates according to a procedure related to a detected FCI responsive to a detection of the repeated FCI.
12. A communications method implemented in a wireless communications system, the communications method comprising:
adding a predetermined value to a downlink (DL) control information (DCI) format notifying time division duplexing (TDD) reconfiguration;
transmitting from a base station to a user equipment (UE) the DCI format comprising a repeated fast TDD configuration indication (FCI);
transmitting, from the base station to the UE, in a first fixed DL subframe in a radio frame, an indication of an uplink (UL)-DL reconfiguration, and
the base station reconfiguring framing intervals by enabling the UE to operate according to a procedure related to a detected FCI responsive to a detection of the repeated FCI.
13. A wireless communications system comprising:
a user equipment (UE); and
a base station configured to transmit to the UE a downlink (DL) control information (DCI) format notifying time division duplexing (TDD) reconfiguration, wherein the DCI format comprises a repeated fast TDD configuration indication (FCI),
wherein a predetermined value is added to the DCI format,
wherein the base station transmits, to the UE, in a first fixed DL subframe in a radio frame, an indication of an uplink (UL)-DL reconfiguration, and
wherein the base station further reconfigures framing intervals by enabling the UE to operate according to a procedure related to a detected FCI responsive to a detection of the repeated FCI.