公开(公告)号：US20190029008A1

公开(公告)日：2019-01-24

申请号：US16142027

申请日：2018-09-26

Applicant: Optis Cellular Technology, LLC

Inventor： Dae Won LEE ,  Ki Jun KIM ,  Dong Wook ROH ,  Yu Jin NOH ,  Joon Kui AHN ,  Jung Hoon LEE

IPC: H04W72/04 ,  H04W24/08

Abstract: A User Equipment (UE) receives control information via a Physical Downlink Control Channel (PDCCH) at subframe k. A decoder monitors a set of PDCCH candidates a UE-specific search space, among the search spaces, at each of aggregation levels (L) of 1, 2, 4 and 8 control channel elements (CCEs). The UE-specific search space is given based on a modulus operation using variables Yk and C for the subframe k. Yk is defined by: Yk=(A*Yk−1+B) mod D. C is determined based on the number of CCEs (NCCE) divided by the aggregation level (L). A, B, and D are predetermined constant values regardless of the aggregation levels (L). Y−1 is determined based on a UE identifier having 16-bits when k=0. The decoder decodes the control information of the PDCCH.

公开(公告)号：US20180035414A1

公开(公告)日：2018-02-01

申请号：US15730783

申请日：2017-10-12

Applicant: Optis Cellular Technology, LLC

Inventor： Dae Won LEE ,  Ki Jun KIM ,  Dong Wook ROH ,  Yu Jin NOH ,  Joon Kui AHN ,  Jung Hoon LEE

IPC: H04W72/04 ,  H04L5/00 ,  H04W24/08 ,  H04L27/26 ,  H04W48/12 ,  H04W88/08 ,  H04W88/02

CPC classification number: H04W72/042 ,  H04L5/0007 ,  H04L5/0037 ,  H04L5/0053 ,  H04L27/2626 ,  H04L27/2647 ,  H04L27/2656 ,  H04L27/2666 ,  H04W24/08 ,  H04W48/12 ,  H04W88/02 ,  H04W88/08

Abstract: A User Equipment (UE) receives a Physical Downlink Control Channel (PDCCH) at subframe k and decodes at the subframe k a set of PDCCH candidates including L control channel elements (CCEs). The L CCEs are contiguously located from a position given by using a variable of Yk and a modulo (N/L) operation, where N represents a total number of CCEs in the subframe k, Yk is defined by Yk=(A*Yk−1)mod D, and A and D are predetermined constant values. When k=0, Y−1 is determined based on a UE identifier having 16-bits.

公开(公告)号：US20210266884A1

公开(公告)日：2021-08-26

申请号：US17317001

申请日：2021-05-11

Applicant: Optis Cellular Technology, LLC

Inventor： Dae Won LEE ,  Ki Jun KIM ,  Dong Wook ROH ,  Yu Jin NOH ,  Joon Kui AHN ,  Jung Hoon LEE

IPC: H04W72/04 ,  H04L5/00 ,  H04L27/26 ,  H04W48/12 ,  H04W24/08

Abstract: A User Equipment (UE) monitors a set of Physical Downlink Control Channel (PDCCH) candidates for control information received from a base station at subframe k. The set of PDCCH candidates to monitor are defined in terms of search spaces. The UE monitors a UE-specific search space, among the search spaces, at each of aggregation levels (L) of 1, 2, 4 and 8 control channel elements (CCEs), the CCE being a resource unit comprising a specific number of resource elements and used for transmission of the control information. The L CCEs correspond to a first PDCCH candidate among the set of PDCCH candidates of the search space at a subframe k are located at positions given by: L*{(Yk)mod(floor(C))}+i, wherein i=0, . . . , L−1, where Yk is defined by: Yk=(A*Yk−1+B) mod D. The variable C is determined based on the number of CCEs (NCCE) divided by the aggregation level (L), and A, B, and D are predetermined constant values predetermined regardless of the aggregation levels L. The UE decodes the control information of the PDCCH.

公开(公告)号：US20200229160A1

公开(公告)日：2020-07-16

申请号：US16827892

申请日：2020-03-24

Applicant: Optis Cellular Technology, LLC

Inventor： Dae Won LEE ,  Ki Jun KIM ,  Dong Wook ROH ,  Yu Jin NOH ,  Joon Kui AHN ,  Jung Hoon LEE

IPC: H04W72/04 ,  H04L5/00 ,  H04L27/26 ,  H04W48/12 ,  H04W24/08

Abstract: A User Equipment (UE) monitors a set of Physical Downlink Control Channel (PDCCH) candidates for control information received from a base station at subframe k. The set of PDCCH candidates to monitor are defined in terms of search spaces. The UE monitors a UE-specific search space, among the search spaces, at each of aggregation levels (L) of 1, 2, 4 and 8 control channel elements (CCEs), the CCE being a resource unit comprising a specific number of resource elements and used for transmission of the control information. The L CCEs correspond to a first PDCCH candidate among the set of PDCCH candidates of the search space at a subframe k are located at positions given by: L*{(Yk)mod(floor(C))}+i, wherein i−0, . . . , L-1, where Yk is defined by: Yk−(A*Yk−1B) mod D. The variable C is determined based on the number of CCEs (NCCE) divided by the aggregation level (L), and A, B, and D are predetermined constant values predetermined regardless of the aggregation levels L. The UE decodes the control information of the PDCCH.

公开(公告)号：US20160381668A1

公开(公告)日：2016-12-29

申请号：US15262298

申请日：2016-09-12

Applicant: Optis Cellular Technology, LLC

Inventor： Dae Won LEE ,  Ki Jun KIM ,  Dong Wook ROH ,  Yu Jin NOH ,  Joon Kui AHN ,  Jung Hoon LEE

IPC: H04W72/04 ,  H04W24/08

CPC classification number: H04W72/042 ,  H04L5/0007 ,  H04L5/0037 ,  H04L5/0053 ,  H04L27/2626 ,  H04L27/2647 ,  H04L27/2656 ,  H04L27/2666 ,  H04W24/08 ,  H04W48/12 ,  H04W88/02 ,  H04W88/08

Abstract: A method for efficiently transmitting and receiving control information through a Physical Downlink Control Channel (PDCCH) is provided. When a User Equipment (UE) receives control information through a PDCCH, the received control information is set to be decoded in units of search spaces, each having a specific start position in the specific subframe. Here, a modulo operation according to a predetermined first constant value (D) is performed on an input value to calculate a first result value, and a modulo operation according to a predetermined first variable value (C) corresponding to the number of candidate start positions that can be used as the specific start position is performed on the calculated first result value to calculate a second result value and an index position corresponding to the second result value is used as the specific start position. Transmitting control information in this manner enables a plurality of UEs to efficiently receive PDCCHs without collisions.

Abstract translation: 提供了一种通过物理下行链路控制信道（PDCCH）高效地发送和接收控制信息的方法。 当用户设备（UE）通过PDCCH接收到控制信息时，所接收的控制信息被设置为以搜索空间为单位进行解码，每个搜索空间在特定子帧中具有特定的开始位置。 这里，对输入值执行根据预定的第一常数值（D）的模运算以计算第一结果值，并且根据与候选开始位置的数量相对应的预定的第一可变值（C）进行模运算 对计算出的第一结果值执行可用作特定开始位置的计算第二结果值，并将与第二结果值对应的索引位置用作特定开始位置。 以这种方式发送控制信息使得多个UE能够有效地接收PDCCH而不发生冲突。