Granted Patent B2

US 12,745,261 · App. 18/398,741 · Granted Sep 22, 2026

Inventor: Eun Young Choi (Daejeon, KR)

Assignee: Electronics and Telecommunications Research Institute

H04W72/232H04L1/0061H04L1/1614

Abstract

Claims (36)

1 . A control channel transmission method of a transmitting node, comprising:

generating cyclic redundancy check (CRC) bits based on downlink control information (DCI) for transmission to a first receiving node;

appending the generated CRC bits to an end of the DCI bits;

masking n CRC bits among the generated CRC bits with bits of a radio network temporary identifier (RNTI), starting from a position indicated by a first masking offset, the bits of RNTI being assigned to identify the first receiving node, wherein n is an integer greater than or equal to 2 and less than a total number of the generated CRC bits; and

transmitting the DCI including the masked CRC bits via a control channel to the first receiving node,

wherein a DCI format used with the first masking offset is different from a DCI format used with a second masking offset.

2 . The control channel transmission method according to claim 1 , wherein the first masking offset further indicates additional control information not included in the DCI.

3 . The control channel transmission method according to claim 1 , wherein the masking the n CRC bits among the generated CRC bits with bits of the RNTI comprises:

determining a first start index of the generated CRC bits based on a default offset, the default offset indicating a default position for a CRC bit among the generated CRC bits arranged from a low index to a high index;

determining a second start index from the first start index based on the first masking offset; and

masking the n CRC bits starting at the second start index among the generated CRC bits with the bits of RNTI.

4 . The control channel transmission method according to claim 3 , further comprising: when the second start index is greater than a last index of the CRC, determining the second start index according to a modulo operation on the second start index by a number of the CRC bits.

5 . The control channel transmission method according to claim 3 , wherein the masking the n CRC bits starting at the second start index with bits of the RNTI comprises: when a number of the CRC bits from the second start index to the last index is smaller than a number of bits of the RNTI, masking CRC bits starting from a lowest index among the generated CRC bits with remaining bits of the RNTI.

6 . The control channel transmission method according to claim 1 , wherein the first masking offset is represented in form of a bitmap.

7 . A transmitting node comprising a processor, wherein the processor causes the transmitting node to perform:

generating cyclic redundancy check (CRC) bits based on downlink control information (DCI) for transmission to a first receiving node;

appending the generated CRC bits to an end of the DCI bits;

masking n CRC bits among the generated CRC bits with bits of a radio network temporary identifier (RNTI), starting from a position indicated by a first masking offset, the RNTI being assigned to identify the first receiving node, wherein n is an integer greater than or equal to 2 and less than a total number of the generated CRC bits; and

transmitting the DCI including the masked CRC bits via a control channel to the first receiving node,

a DCI format used with a first masking offset is different from a DCI format used with a second masking offset.

8 . The transmitting node according to claim 7 , wherein the first masking offset further indicates additional information not included in the DCI.

9 . The transmitting node according to claim 7 , wherein in the masking the n CRC bits among the generated CRC bits with bits of the RNTI, the processor further causes the transmitting node to perform:

determining a first start index of generated the CRC bits based on a default offset, the default offset indicating a default position for a CRC bits among the generated CRC bits arranged from a low index to a high index;

determining a second start index from the first start index based on the first masking offset; and

masking CRC bits starting at the second start index among the generated CRC bits with the bits of RNTI.

10 . The transmitting node according to claim 9 , wherein the processor further causes the transmitting node to perform: when the second start index is greater than a last index of the CRC, determining the second start index according to a modulo operation on the second start index by a number of the CRC bits.

11 . The transmitting node according to claim 9 , wherein in the masking the n CRC bits starting at the second start index with bits of the RNTI, the processor further causes the transmitting node to perform: when a number of the CRC bits from the second start index to the last index is smaller than a number of bits of the RNTI, masking CRC bits starting a lowest index among the generated CRC bits with remaining bits of the RNTI.

12 . The transmitting node according to claim 7 , wherein the first masking offset is represented in form of a bitmap.

13 . A control channel reception method of a receiving node, comprising:

receiving, from a transmitting node, downlink control information (DCI) via a control channel, the DCI including cyclic redundancy check (CRC) bits, wherein n CRC bits among the CRC bits included in the DCI are masked with bits of a radio network temporary identifier (RNTI) assigned to the receiving node, and n is an integer greater than or equal to 2 and less than a total number of the generated CRC bits;

channel-decoding the received DCI;

for each of a plurality of candidate masking offsets, removing masking from the n CRC bits using the bits of the RNTI;

performing a CRC check on the received DCI after removing the masking; and

in response to detecting no error in the CRC check, determining a DCI format based on a first masking offset used for removing the masking,

wherein a DCI format used with the first masking offset is different from a DCI format used with a second masking offset.

14 . The control channel reception method according to claim 13 , wherein the first masking offset used for removing the masking further indicates additional control information not included in the DCI.

Assignments (1)

Priority Claims (1)

Continuity (1)

References Cited (19)