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公开(公告)号:US20210315003A1
公开(公告)日:2021-10-07
申请号:US17353375
申请日:2021-06-21
Inventor: TAKASHI IWAI , YOSHIO URABE , TOMOHUMI TAKATA
Abstract: In an AP, a Trigger frame generator generates a trigger signal instructing an uplink signal transmission, the trigger signal including a terminal information field that includes a terminal ID subfield and a resource unit allocation information subfield, and a radio transmitter/receiver transmits the trigger signal. In a case where the trigger signal includes a first terminal information field specifying one or more contiguous resource units for random access, the Trigger frame generator sets an unused ID that is not to be used as a terminal ID in the first terminal information field.
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公开(公告)号:US20190036642A1
公开(公告)日:2019-01-31
申请号:US16151049
申请日:2018-10-03
Inventor: LEI HUANG , YOSHIO URABE , ROJAN CHITRAKAR
IPC: H04L1/00 , H04B7/0413 , H04L1/06 , H04L27/26
Abstract: An transmission apparatus of the present disclosure comprises a transmission signal generator which, in operation, generates a transmission signal that includes a non-legacy preamble and a data field, the non-legacy preamble comprising a first field for indicating a number of spatial streams (Nss) in the data field and a second field for indicating one of a plurality of modulation and coding schemes (MCSs), wherein two or more frequency diversity transmission schemes are supported and each of the two or more frequency diversity transmission schemes is specified based on a value of the Nss; and a transmitter which, in operation, transmits the generated transmission signal.
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公开(公告)号:US20240259073A1
公开(公告)日:2024-08-01
申请号:US18631440
申请日:2024-04-10
Inventor: LEI HUANG , YOSHIO URABE , ROJAN CHITRAKAR
CPC classification number: H04B7/068 , H04B7/0413 , H04B7/0689 , H04J11/0066 , H04L1/00 , H04L1/0003 , H04L1/0606 , H04L5/0025 , H04L27/26 , H04L27/2634 , H04L5/0048 , H04L27/2613
Abstract: A communication apparatus of the present disclosure includes a receiver which, in operation, receives a signal that includes a non-legacy preamble and a data field, the non-legacy preamble comprising a first field for indicating a number of spatial streams (Nss) in the data field and a second field for indicating one of a plurality of modulation and coding schemes (MCSs), wherein two or more frequency diversity transmission schemes are supported and one of the two or more frequency diversity transmission schemes is applied based on a value of the Nss; and circuitry which, in operation, decodes the signal.
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公开(公告)号:US20230148178A1
公开(公告)日:2023-05-11
申请号:US18149607
申请日:2023-01-03
Inventor: ROJAN CHITRAKAR , LEI HUANG , YOSHIO URABE
IPC: H04W12/037 , H04W12/04 , H04W52/02 , H04W12/106
CPC classification number: H04W12/037 , H04W12/04 , H04W52/0235 , H04W12/106
Abstract: The present disclosure provides a communication apparatus comprising a cryptographic circuitry which, in operation, uses a shared cryptographic secret Key and a cryptographic salt to generate a cryptographically encoded Message Integrity Code (MIC) that is computed over the 0address field of a Wake Up Radio (WUR) frame; and a transmission signal generator which, in operation, generates a secure WUR signal by replacing the address field of the WUR frame with the MIC; and a transmitter which, in operation, transmits the secure WUR signal.
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公开(公告)号:US20190182864A1
公开(公告)日:2019-06-13
申请号:US16322419
申请日:2017-08-21
Inventor: LEI HUANG , ROJAN CHITRAKAR , YOSHIO URABE , ISAMU YOSHII
Abstract: An communication apparatus of the present disclosure comprises a receiver that receives a Trigger frame for allocating resource units (RUs) for random access and another frame including Random Access parameter element that comprises a first field indicating an OFDMA contention window (OCW) minimum value (OCWmin) and a second field indicating an OCW maximum value (OCWmax); and control circuitry that controls Uplink OFDMA-based Random Access (UORA) procedure using the OCWmin and the OCWmax.
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公开(公告)号:US20230362634A1
公开(公告)日:2023-11-09
申请号:US18354543
申请日:2023-07-18
Inventor: ROJAN CHITRAKAR , LEI HUANG , YOSHIO URABE
IPC: H04W12/037 , H04W12/106 , H04W12/04 , H04W52/02
CPC classification number: H04W12/037 , H04W12/106 , H04W12/04 , H04W52/0235
Abstract: The present disclosure provides a communication apparatus comprising a cryptographic circuitry which, in operation, uses a shared cryptographic secret Key and a cryptographic salt to generate a cryptographically encoded Message Integrity Code (MIC) that is computed over the address field of a Wake Up Radio (WUR) frame; and a transmission signal generator which, in operation, generates a secure WUR signal by replacing the address field of the WUR frame with the MIC; and a transmitter which, in operation, transmits the secure WUR signal.
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公开(公告)号:US20230170966A1
公开(公告)日:2023-06-01
申请号:US18160895
申请日:2023-01-27
Inventor: LEI HUANG , YOSHIO URABE , ROJAN CHITRAKAR
CPC classification number: H04B7/068 , H04L1/0606 , H04L27/26 , H04B7/0689 , H04L5/0025 , H04J11/0066 , H04L27/2634 , H04L1/00 , H04B7/0413 , H04L1/0003 , H04L27/2613 , H04L5/0048
Abstract: A communication apparatus of the present disclosure includes a receiver which, in operation, receives a signal that includes a non-legacy preamble and a data field, the non-legacy preamble comprising a first field for indicating a number of spatial streams (Nss) in the data field and a second field for indicating one of a plurality of modulation and coding schemes (MCSs), wherein two or more frequency diversity transmission schemes are supported and one of the two or more frequency diversity transmission schemes is applied based on a value of the Nss; and circuitry which, in operation, decodes the signal.
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公开(公告)号:US20210352587A1
公开(公告)日:2021-11-11
申请号:US17380834
申请日:2021-07-20
Inventor: LEI HUANG , YOSHIO URABE , ROJAN CHITRAKAR
IPC: H04W52/02 , H04L12/861
Abstract: A communication apparatus of the present disclosure comprises a first receiver which, in operation, receives a downlink data frame from a base station; a decoder which, in operation, decodes data included in the received downlink data frame; a signal generator which, when the decoded data indicates that there is no buffered traffic for the communication apparatus, generates an uplink frame that includes acknowledgement information and a wake-up radio (WUR) mode request indicating a request to transit to the WUR mode from a primary connectivity radio (PCR) mode; and a transmitter which, in operation, transmits the uplink frame to the base station.
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公开(公告)号:US20210297207A1
公开(公告)日:2021-09-23
申请号:US17339756
申请日:2021-06-04
Inventor: LEI HUANG , ROJAN CHITRAKAR , YOSHIO URABE
Abstract: A transmission apparatus of the present disclosure comprises a transmission signal generator which, in operation, generates a transmission signal that includes a legacy preamble, a non-legacy preamble and a data field, wherein the non-legacy preamble comprises a first signal field and a second signal field, the second signal field comprising a first channel field for a first subband channel and, when the transmission signal occupies more than one subband channel, the second signal field further comprising a second channel field for a second subband channel different from the first subband channel, each of the first channel field and the second channel field comprising a user-specific field that includes a plurality of user fields, each user field carrying per-user allocation information for corresponding one of one or more terminal stations, and wherein the plurality of user fields are split equitably between the first channel field and the second channel field when a full bandwidth that covers the first subband channel and the second subband channel is allocated for multi-user (MU) MIMO transmission; and a transmitter which, in operation, transmits the generated transmission signal.
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公开(公告)号:US20190082467A1
公开(公告)日:2019-03-14
申请号:US16183280
申请日:2018-11-07
Inventor: TOMOYA NUNOME , TAKASHI IWAI , YOSHIO URABE
Abstract: A wireless station that belongs to a communication cell includes a receiver which, in operation, receives a trigger frame transmitted from an access point that belongs to an interference cell and a controller which, in operation, determines, based on at least one parameter included in the trigger frame and reception power value of the trigger frame received at the wireless station, whether the wireless station is allowed to transmit to other wireless station that belongs to the communication cell, wherein the at least one parameter includes a value set based on transmit power value of the trigger frame transmitted from the access point.
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