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111.发明申请公开(公告)号：US20210321455A1
公开(公告)日：2021-10-14
申请号：US17267707
申请日：2018-08-15
Applicant: Beijing Xiaomi Mobile Software Co., Ltd. , BEIJING UNIVERSITY OF POSTS AND TELECOMMUNICATIONS
Abstract: The present application discloses a backoff method and apparatus in a transmission process, a device, a system, and a storage medium, which relate to the field of communication technology. The method includes: a transmitting device performing LBT in an unlicensed frequency band; the transmitting device transmitting an RTS to a receiving device when the LBT has been successfully performed, the RTS including a first backoff time period; the transmitting device transmitting, after having received a CTS transmitted by the receiving device, a C-CTS to the receiving device, the C-CTS including a second backoff time period.
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公开(公告)号：US20210231816A9
公开(公告)日：2021-07-29
申请号：US16647171
申请日：2019-03-08
Inventor： ZHONGLIANG DENG , BUYUN JIA , JUN MO , XINMEI BIAN , HAIJUN JIANG , SHIWEI FAN
Abstract: A signal acquisition method and device. Positioning signals as received are divided into at least two groups and frequency compensation is performed on each group of positioning signals. Each frequency compensated group of positioning signals is divided into at least two signal blocks, and an averaging operation is performed on the signal blocks in each group of signals, so as to obtain block-averaged groups of positioning signals. An acquisition result is determined based on the block-averaged groups of positioning signals. Noise power of each block-averaged group of signals is reduced. Therefore, noise power of received positioning signals can be reduced. This may improve signal-to-noise ratio of received signals and acquisition sensitivity of a receiver. Therefore, acquisition success rate of weak signals is increased.
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公开(公告)号：US20210133479A1
公开(公告)日：2021-05-06
申请号：US17039346
申请日：2020-09-30
Inventor： Zhanyu MA , Dongliang CHANG , Jiyang XIE , Yifeng DING , Zhongwei SI
Abstract: The present disclosure provides a fine-grained image recognition method, an electronic device and a computer readable storage medium. The method comprises the steps of feature extraction, calculation of feature discriminant loss function, calculation of feature diversity loss function and calculation of model optimization loss function. The present disclosure comprehensively considers influences of factors such as a large intra-class difference, a small inter-class difference, and a great influence of background noise of the fine-grained image, and makes constrains such that the feature maps belonging to each class are discriminative and have the features of corresponding class, thus reducing the intra-class difference, decreasing the learning difficulty and learning better discriminative features. The constraints make the feature maps belonging to each class have a diversity, which increases the inter-class difference, achieves a good result, and is easy for practical deployment, thereby obviously improving the effect of multiple fine-grained image classification tasks.
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公开(公告)号：US20210045027A1
公开(公告)日：2021-02-11
申请号：US16968537
申请日：2018-02-09
Applicant: BEIJING XIAOMI MOBILE SOFTWARE CO., LTD. , BEIJING UNIVERSITY OF POSTS AND TELECOMMUNICATIONS
Abstract: Disclosed are a handover method for between base stations, and a device, system and storage medium. The base station sends a handover request to a target base station, where the handover request carries type information of a core network used for indicating the type of core network which the UE to be handed over between base stations needs to access. The base station receives a handover response sent from the target base station, where the handover response indicates whether the target base station allows the UE to be handed over to the target base station, and the handover response is sent by the target base station according to the type information of a core network and the type of at least one core network connected to the target base station.
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115.发明授权公开(公告)号：US10812234B2
公开(公告)日：2020-10-20
申请号：US16255927
申请日：2019-01-24
Inventor： Zhongyuan Zhao , Mugen Peng
Abstract: The embodiments of the present invention provide an interleave-based method and apparatus for enhancing capacity of a random access channel, wherein the method is applied to a terminal device. The method includes: receiving a set of preamble sequences and at least two interleavers sent by a base station; determining, when a random access is triggered, a to-be-used preamble sequence from the set of preamble sequences as a target preamble sequence, and randomly determining a to-be-used interleaver from the at least two interleavers as a target interleaver; performing interleaving processing on the target preamble sequence by using the target interleaver to generate an interleaved target preamble sequence, wherein, performing interleaving processing on the same preamble sequence by using different interleavers will generate different interleaved preamble sequences; sending a random access request to the base station by using the interleaved target preamble sequence. Applying the embodiments of the present invention can increase the number of available preamble sequences and increase the capacity of the PRACH.
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Patent Agency Ranking
公开(公告)号：US20200236142A1
公开(公告)日：2020-07-23
申请号：US16451274
申请日：2019-06-25
Inventor： Shanguo HUANG , Xin LI , Junfeng GUO , Ying TANG , Yongjun ZHANG , Shan YIN
Abstract: Disclosed is a method and device for target sequence identification, wherein an optical binary sequence and an all-zero sequence are subjected to an XNOR operation and a first candidate sequence set is generated by splitting the result sequence; a second candidate sequence set is generated by splitting the optical binary sequence; multiple binary sequences are selected from the first candidate sequence set and the second candidate sequence set according to the target sequence to generate a to-be-delayed sequence set; various delay duration are configured for each binary sequence of the to-be-delayed sequence set; a to-be-matched sequence set is generated after delaying; an AND operation is performed on the sequences of the to-be-matched sequence set to generate a final sequence; and the number and position of the target sequence in the binary sequence can be determined according to the number and position of a pulse in the final sequence.
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公开(公告)号：US10674434B2
公开(公告)日：2020-06-02
申请号：US16619207
申请日：2017-10-23
Inventor： Xiaojun Jing , Wei Yang , Hai Huang
IPC: H04W48/06 , H04W24/08 , H04B17/391 , H04W48/16 , H04W28/02 , H04W40/18 , H04B17/382 , H04L12/911
Abstract: The embodiment of the present application provides a method and apparatus for spectrum prediction in a cognitive radio network. The method comprises: receiving a target access request from a secondary user; obtaining real-time occupancy information of bands through a subspace filtering-based spectrum sensing approach; updating a spectrum resource database of radio environment maps (REM) according to the real-time occupancy information of hands; establishing a prediction model for bands occupied by primary users according to the updated spectrum resource database of radio environment maps (REM); and allowing an access of the secondary user to a target band according to the prediction model for bands occupied by primary users. The method and apparatus provided by embodiments of the present application allow a secondary user to have a targeted spectrum access. The spectrum utilization efficiency of the radio network can thus be improved.
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公开(公告)号：US10531168B2
公开(公告)日：2020-01-07
申请号：US16396386
申请日：2019-04-26
Inventor： Rentao Gu , Yanxia Tan , Yuefeng Ji
IPC: H04Q11/00
Abstract: Embodiments provides a low-latency data switching device and method. The device includes at least two boundary hardware modules and at least one optical forwarding module. The first boundary hardware module is configured for matching, with a first data forwarding table, signaling message information for a signaling message sent by a host router, acquiring a service request sent by the host router, and searching a second data forwarding table for an optical channel for the service request. The at least one optical forwarding module is configured for mapping the service request to a second service request, and forwarding the second service request in sequence via the optical channel, the second boundary hardware module is configured for acquiring next-hop routing information of the data switching device for the service request, and forwarding the service request to the next-hop router of the data switching device.
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119.发明申请公开(公告)号：US20190394129A1
公开(公告)日：2019-12-26
申请号：US16209865
申请日：2018-12-04
Inventor： Jianxin LIAO , Qi QI , Jing WANG , Jingyu WANG , Jiannan BAO
IPC: H04L12/801
Abstract: Embodiments of the present invention provide a congestion control method and apparatus based on a software defined network SDN, and an SDN controller. The method comprises: obtaining a packet_in message sent by a switch; determining a data packet included in the packet_in message; performing a first congestion control processing for a network where the SDN controller is located based on a topological structure and link information of the network when the data packet is a handshake information SYN packet for requesting to establish a TCP connection; performing a second congestion control processing for the network based on the link information when the data packet is a finish information FIN packet for responding to disconnection of a TCP connection; deleting information of a TCP connection stored in a database and corresponding to the data packet when the data packet is an FIN packet requesting to disconnect a TCP connection. As compared with the prior art, by using the solutions according to the embodiments of the present invention, the SDN controller may improve fairness of the bandwidth between each data flow, and reduce TCP retransmission and timeout caused by the highly burst short traffic, and achieve the control of the TCP Incast congestion existing in the datacenter
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120.发明申请公开(公告)号：US20190182169A1
公开(公告)日：2019-06-13
申请号：US16216087
申请日：2018-12-11
Applicant: State Grid Henan Information & Telecommunication Company , Beijing University of Posts and Telecommunications
Inventor： Wencui LI , Shiwen WANG , Siya XU , Gangsong DONG , Shaoyong GUO , Yi JIN , Xiong LI , Lei FENG , Jing SHEN
IPC: H04L12/857 , H04L12/803 , H04L12/715 , G06F9/48 , G06F9/455
Abstract: The present application provides a method for dynamically allocating resources in an SDN/NFV network based on load balancing. For multimedia services with different demands, a virtual link mapping target, a constraint and a load state of a physical link are associated. A subtask is adaptively mapped to a network node according to the load state of the physical link. The method effectively distinguishes used resources and remaining resources of a physical node and a link to balance the load, and thereby improve the utilization of network resources and avoid occurrence of a local optimum or current optimum. The solution involves performing a subtask mapping to find a server node satisfying constraints for each subtask in a service request. The model for mapping the subtask is min T → V Target 1 s . t . C 1 , C 2 , C 3 , C 4 . A virtual link mapping is then performed to find a physical path for each virtual link in the service request, which satisfies the capability constraint of the virtual link. The dynamic virtual mapping is described as min E T → E s Target 2 s . t . C 1 ′ , C 2 ′ , C 3 ′ .
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