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公开(公告)号：US11375381B2
公开(公告)日：2022-06-28
申请号：US17155894
申请日：2021-01-22
Applicant: QUALCOMM Incorporated
Inventor： Aleksandar Damnjanovic , Tevfik Yucek , Yongbin Wei
IPC: H04W16/14 , H04B17/318 , H04W24/10 , H04W84/12
Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a node may receive a configuration associated with measuring an energy level of a first frequency channel of an unlicensed radio frequency band, wherein the configuration indicates a set of measurement occasions during which the energy level is to be measured on the first frequency channel; measure the energy level on the first frequency channel in a first measurement occasion, of the set of measurement occasions, according to the configuration; and operate in association with a second frequency channel of the unlicensed radio frequency band based at least in part on measuring the energy level on the first frequency channel, wherein the second frequency channel is paired with the first frequency channel for the unlicensed radio frequency band. Numerous other aspects are provided.
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公开(公告)号：US11330503B2
公开(公告)日：2022-05-10
申请号：US16921617
申请日：2020-07-06
Applicant: QUALCOMM Incorporated
Inventor： Durga Prasad Malladi , Yongbin Wei , Tao Luo , Aleksandar Damnjanovic
Abstract: Techniques for transmitting and receiving wireless communications over an unlicensed radio frequency spectrum band are disclosed, including techniques for transmitting and receiving system information blocks over the unlicensed radio frequency spectrum band, techniques for gaining access to the unlicensed radio frequency spectrum band by performing extended clear channel assessments (ECCAs), techniques for transmitting and receiving synchronization signals and reference signals over the unlicensed radio frequency spectrum band, techniques for identifying starting times of downlink transmissions over the unlicensed radio frequency spectrum band, techniques for transmitting and receiving clear channel assessment (CCA)-exempt transmissions over the unlicensed radio frequency spectrum band, techniques for performing random access over the unlicensed radio frequency spectrum band, and techniques for dynamically modifying a transmission mode over the unlicensed radio frequency spectrum band.
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公开(公告)号：US11265887B2
公开(公告)日：2022-03-01
申请号：US16566566
申请日：2019-09-10
Applicant: QUALCOMM Incorporated
Inventor： Yisheng Xue , Aleksandar Damnjanovic , Xiaoxia Zhang , Jing Sun , Yongbin Wei , Tamer Kadous
Abstract: Methods, systems, and devices for wireless communications are described. A user equipment (UE) may determine that a serving base station of the UE has obtained access to a wireless channel of a shared radio frequency spectrum band during a transmission opportunity that is separate from a scheduled uplink transmission by the UE. The UE may perform, based at least in part on the determination, a clear channel assessment (CCA) procedure on the wireless channel during a designated quiet portion of the transmission opportunity. The UE may transmit an unsolicited CCA status report to the serving base station during the transmission opportunity based at least in part on the CCA procedure.
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公开(公告)号：US11197166B2
公开(公告)日：2021-12-07
申请号：US16871867
申请日：2020-05-11
Applicant: QUALCOMM Incorporated
Inventor： Aleksandar Damnjanovic , Andrei Dragos Radulescu , Yongbin Wei
Abstract: Synchronous communications mode detection is disclosed for unlicensed spectrum communications. To detect synchronous mode communications, an observing node monitors on-off transitions of communication transmissions on a shared communication spectrum. The observing node detects the on-off transition spacing of the on-off transitions over a sliding window of a detection period duration. The node may determine the number of candidate synchronous on-off transition spacings of the detected on-off transition spacings that are equal to an integer multiple of a synchronization period. If the number of candidate synchronous on-off transition spacings exceeds a threshold value the observing node will declare detection of a synchronous operation mode of the shared communication spectrum.
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公开(公告)号：US11190234B2
公开(公告)日：2021-11-30
申请号：US16385943
申请日：2019-04-16
Applicant: QUALCOMM Incorporated
Inventor： Aleksandar Damnjanovic , Srinivas Yerramalli , Xiaoxia Zhang , Tamer Kadous , Yongbin Wei , Jing Sun , Andrei Dragos Radulescu
IPC: H04B1/7136 , H04B1/7143 , H04B1/7156 , H04L27/26
Abstract: Techniques providing opportunistic frequency switching for frame based equipment (FBE), such as may be configured to minimize opportunistic frequency switching delay in FBE new radio (NR) unlicensed (NR-U) networks and/or to provide frequency diversity FBE access based on offset sequences of medium sensing occasions for the carrier frequencies are disclosed. Within the FBE mode network, a base station may configure a pattern of sensing locations in each frame for each frequency transmission unit of the plurality of frequency transmission units, wherein an inter-unit delay of sensing locations between a first frequency transmission unit and a next adjacent frequency transmission unit and between a last frequency transmission unit and the first frequency transmission unit is a fixed duration. Opportunistic frequency switching of embodiments may utilize the medium sensing locations for opportunistically switching between a sequence of the frequency transmission units for implementing frequency diversity FBE access.
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Patent Agency Ranking
公开(公告)号：US11172482B2
公开(公告)日：2021-11-09
申请号：US16692139
申请日：2019-11-22
Applicant: QUALCOMM Incorporated
Inventor： Madhavan Srinivasan Vajapeyam , Vikas Jain , Kiran Kumar Somasundaram , Aleksandar Damnjanovic , Fang Chen
IPC: H04W72/04 , H04W72/12 , H04J11/00 , H04L5/00 , H04L29/12 , H04W8/08 , H04W28/02 , H04W72/14 , H04W84/12 , H04W88/02
Abstract: Techniques are described for wireless communication. One method includes identifying a priority parameter associated with data to be transmitted on an uplink carrier; selecting, based at least in part on the identified priority parameter, between a first type of message for requesting uplink resources in a shared radio frequency spectrum band or a dedicated radio frequency spectrum band, or a second type of message for requesting uplink resources in the dedicated radio frequency spectrum band; and transmitting the selected type of message.
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公开(公告)号：US11153869B2
公开(公告)日：2021-10-19
申请号：US15889454
申请日：2018-02-06
Applicant: QUALCOMM Incorporated
Inventor： Hao Xu , Peter Gaal , Wanshi Chen , Tingfang Ji , Durga Prasad Malladi , Yongbin Wei , Naga Bhushan , Aleksandar Damnjanovic , Tao Luo
Abstract: Certain aspects of the present disclosure relate to techniques for configuring an adaptive frame structure for wireless communications systems using unlicensed radio frequency spectrum. A base station (BS) may determine whether another device is transmitting on a channel in the unlicensed radio frequency spectrum or one or more other network conditions pertaining to the channel, determine a frame structure from a plurality of frame structures used for data communications based at least in part on the one or more network conditions, wherein each of the plurality of frame structures has a different frame duration, and communicate with a user equipment (UE) using the determined frame structure. A UE may determine a frame structure from a plurality of frame structures used for data communications, wherein each of the plurality of frame structures has a different frame duration, and communicate with a BS using the determined frame structure.
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公开(公告)号：US11147100B2
公开(公告)日：2021-10-12
申请号：US16537343
申请日：2019-08-09
Applicant: QUALCOMM Incorporated
Inventor： Aleksandar Damnjanovic , Yisheng Xue , Lorenzo Ferrari
Abstract: Methods, systems, and devices for wireless communications are described. A first wireless device may perform a clear channel assessment on a medium to determine if the medium is available for communications with a second wireless device. Based on a successful clear channel assessment, the first wireless device may transmit a medium reservation message to the second wireless device. The second wireless device may then transmit a reservation response message to the first wireless device, where the reservation response message includes synchronization information for the first device to synchronize with the second wireless device. The synchronization information may include a duration of a channel occupancy time, a duration of a synchronous contention window, and/or a duration in which the first wireless device is to maintain synchronization with the second wireless device. Accordingly, the first wireless device and the second wireless device may communicate based on the synchronization information via the medium.
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公开(公告)号：US11083025B2
公开(公告)日：2021-08-03
申请号：US16173354
申请日：2018-10-29
Applicant: QUALCOMM Incorporated
Inventor： Aleksandar Damnjanovic , Qingsi Wang , Vikas Jain
Abstract: The disclosure provides a method and system for requesting access to resources for uplink communications in unlicensed spectrum. In particular, a user equipment (UE) may detect one or more of a first type of data or a second type of data to be transmitted to a base station (BS). The UE may then determine if a first type of physical random access channel (PRACH) resource is available for transmitting one or more of the first type of data or the second type of data to the BS. If the first type of PRACH resource is available, then the UE may transmit one or more of the first type of data or the second type of data using the first type of PRACH resource. If the first type of PRACH resource is not available, then the UE may transmit the second type of data using a second type of PRACH resource.
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公开(公告)号：US11064396B2
公开(公告)日：2021-07-13
申请号：US16125258
申请日：2018-09-07
Applicant: QUALCOMM Incorporated
Inventor： Zhifei Fan , Xiaoxia Zhang , Jing Sun , Aleksandar Damnjanovic
Abstract: Certain aspects of the present disclosure relate to methods and apparatus for transmitting channel reservation signals. In one example, a device used a gating interval to gain access to a channel of a shared spectrum, performs a clear channel assessment to determine if the channel is available, selects a channel reservation signal from among a plurality of predetermined channel reservation signals if the channel is clear, and transmits the channel reservation signal upon the channel being clear. The channel reservation signal comprises a preamble, and a message, wherein the CR preamble and the CR message use a common numerology understood by at least one of different radio access technologies, and different numerologies in the same radio access technology, and the radio access technologies comprise WIFI and NR-SS.
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