Patents Assigned to Shanghai Research Center for Wireless Communications
  • Patent number: 10362551
    Abstract: The present invention discloses a calibration method for parallel multi-channel wireless channel measurement and a calibration system thereof. The transmitting end and the receiving end are disconnected, and are respectively connected to the calibration receiving channel and the calibration transmitting channel, and the calibration receiving channel/calibration transmitting channel cooperates with a measurement channel in air interface measurement, to calibrate a channel response characteristic of the transmitting end and the receiving end. By means of the present invention, a current channel response characteristic between multiple channels can be online supervised in real time, so as to ensure that a measurement error because of an impact of mutual interference between multiple channels can be avoided in the channel measurement process.
    Type: Grant
    Filed: August 6, 2017
    Date of Patent: July 23, 2019
    Assignee: SHANGHAI RESEARCH CENTER FOR WIRELESS COMMUNICATIONS
    Inventors: Zhong-fei Cai, Yun-song Gui, Hao-wen Wang, Ming-tuo Zhou, Yang Yang, Hai-feng Wang
  • Patent number: 10342030
    Abstract: The present invention discloses a network optimization method for a large-scale MIMO network and a base station thereof. The base station enables, according to a user minimum SINR threshold of each user in a preset cell, instantaneous spectral efficiency of the cell at a specific moment to approximate or reach a maximum value. In the present invention, a newly added user minimum SINR threshold parameter is configured, and a characteristic of a concave function is used, so that average spectral efficiency and edge spectral efficiency of each cell are simply and effectively controlled, so as to achieve an objective of coordination adjustment of network capacity and network coverage.
    Type: Grant
    Filed: August 7, 2017
    Date of Patent: July 2, 2019
    Assignee: SHANGHAI RESEARCH CENTER FOR WIRELESS COMMUNICATIONS
    Inventors: Kai Li, Hui-yue Yi, Jiang Wang, Yang Yang, Hai-feng Wang
  • Patent number: 10333748
    Abstract: The present invention discloses an adaptive parameter adjustment method for a hybrid precoding millimeter-wave transmission system. The method includes the following step: interacting between a transmitter and a receiver for a number of radio frequency chains that need to be established. The receiver calculates, according to a received signal power at the time of established a different number of radio frequency chains and a total power consumption at the time of established the different number of radio frequency chains, the number of the radio frequency chains that need to be established. According to the present invention, under a condition of balancing power consumption and a rate, a number of radio frequency chains that need to be established is adaptively selected, so as to optimally configure power consumption and a transmission rate in a millimeter-wave transmission system.
    Type: Grant
    Filed: August 8, 2017
    Date of Patent: June 25, 2019
    Assignee: SHANGHAI RESEARCH CENTER FOR WIRELESS COMMUNICATIONS
    Inventors: Xiu-mei Yang, Wu-xiong Zhang, Meng-ying Zhang, Yang Yang, Hai-feng Wang
  • Patent number: 10321325
    Abstract: Disclosed are an inter-network shared frequency spectrum optimization system and method. In the optimization method, a frequency spectrum resource allocated to a first network in a shared frequency spectrum pool comprises a frequency spectrum resource occupied by an OPEN mode base station in a first cell cluster, and a frequency spectrum resource allocated to a second network in the shared frequency spectrum pool comprises a frequency spectrum resource occupied by an OPEN mode base station in a second cell cluster, wherein the frequency spectrum resource occupied by each OPEN mode base station in the first cell cluster and the frequency spectrum resource occupied by each OPEN mode base station in the second cell cluster have the same size. The present invention improves the frequency spectrum efficiency and the base station service quality are improved.
    Type: Grant
    Filed: December 28, 2015
    Date of Patent: June 11, 2019
    Assignee: SHANGHAI RESEARCH CENTER FOR WIRELESS COMMUNICATIONS
    Inventors: Xubo Gu, Jiang Wang, Jing Xu, Yong Teng, Kari Horneman
  • Patent number: 10264603
    Abstract: A coordination method between access points using unlicensed frequency bands and a network control node using this method are disclosed. The method includes: the first access points adjusting transmission parameters thereof to increase channel access probability of the first access points; and the second access points adjusting transmission parameters thereof to decrease the channel access probability of the second access points; wherein the degree to which channel access probability of the third access points is decreased due to adjustment of the transmission parameters of all the first access points is equivalent to the degree to which the channel access probability is increased due to adjustment of the transmission parameters of all the second access points. Through coordination between multiple access points in the same network, fair coexistence with other networks using unlicensed frequency bands can be ensured while user QoS is improved.
    Type: Grant
    Filed: December 2, 2016
    Date of Patent: April 16, 2019
    Assignee: SHANGHAI RESEARCH CENTER FOR WIRELESS COMMUNICATIONS
    Inventors: Meng-Ying Zhang, Yang Li, Ting Zhou, Yang Yang, Honglin Hu, Haifeng Wang
  • Patent number: 10225869
    Abstract: An Internet of things (IoT) device random access method based on a massive MIMO technology is disclosed, and a cellular IoT communication system using the random access method is also disclosed. In the method, multiples users access a base station by using the same preamble sequence, the users accessing the base station in different beams respectively. By use of narrow beam characteristics of a massive MIMO technology, users in different beams can use the same preamble sequence for random access, thus greatly reducing collision probability of the random access and greatly increasing the number of users of random access, and congestion and collision problems during random access of a great number of users in the cellular IoT communication system can be effectively solved.
    Type: Grant
    Filed: December 22, 2016
    Date of Patent: March 5, 2019
    Assignee: SHANGHAI RESEARCH CENTER FOR WIRELESS COMMUNICATIONS
    Inventors: Huiyue Yi, Jiang Wang, Jing Xu, Yang Yang
  • Patent number: 10225773
    Abstract: The present invention discloses a cellular-network-assisted wireless local area network (WLAN) channel switch announcement method, including the following steps: before a wireless network access point (AP) performs channel switching, delivering channel switch announcement signaling to correlated user equipment in a broadcast manner, and sending channel switch announcement request signaling to a cellular network base station that also serves the user equipment; after the cellular network base station receives the channel switch announcement request signaling, sending the channel switch announcement signaling to user equipment in an idle mode by using a cellular link air interface; and performing, by the WLAN AP, channel switching within a predetermined time, and following, by user equipment that directly acquires channel switch information by receiving the channel switch announcement signaling and user equipment that acquires channel switch information by using the cellular network base station, the WLAN AP an
    Type: Grant
    Filed: December 28, 2015
    Date of Patent: March 5, 2019
    Assignee: SHANGHAI RESEARCH CENTER FOR WIRELESS COMMUNICATIONS
    Inventors: Cheng Zhao, Yuanping Zhu, Yang Yang, Honglin Hu, Haifeng Wang, Hua Qian
  • Patent number: 10182448
    Abstract: Disclosed is a network interference coordination method in a co-primary spectrum sharing scenario. The method comprises the following steps: a first network and a second network negotiate an inter-network shared band, the shared band being in a shared spectrum pool; the first network evaluates inter-network interference; the first network determines whether to perform internal coordination, if internal coordination is performed, the first network performs internal coordination; if internal coordination is not performed, request the second network to perform inter-network interference coordination; the second network determines whether to perform internal coordination, if internal coordination is performed, the second network performs internal coordination; and if internal coordination is not performed, go back to the step of negotiating, by a first network and a second network, an inter-network shared band.
    Type: Grant
    Filed: December 22, 2015
    Date of Patent: January 15, 2019
    Assignee: SHANGHAI RESEARCH CENTER FOR WIRELESS COMMUNICATIONS
    Inventors: Yuanping Zhu, Jiang Wang, Qiaoling Yu, Yong Teng, Kari Horneman
  • Patent number: 10171267
    Abstract: An uplink pilot sequence allocation method in a massive MIMO system is disclosed, the system including the master base station in the master cell and a neighboring base station in a neighboring cell, including: the neighboring base station comparing a primary eigen-space between a user group of the neighboring cell and the neighboring base station, with an interference eigen-space between a user group of the master cell close to the neighboring base station and the neighboring base station, and determining whether the user group of the neighboring cell can reuse uplink pilot sequence resources used by the user group of the master cell. In a manner of increasing information exchange, intercell cooperative uplink pilot sequence allocation is achieved, and uplink pilot contamination in a multi-cell massive MIMO system is reduced effectively.
    Type: Grant
    Filed: December 13, 2016
    Date of Patent: January 1, 2019
    Assignee: SHANGHAI RESEARCH CENTER FOR WIRELESS COMMUNICATIONS
    Inventors: Huiyue Yi, Jing Xu, Yang Yang, Honglin Hu
  • Patent number: 10172149
    Abstract: The present invention discloses an uplink resource scheduling method, and also discloses a corresponding terminal and base station. In the method, a base station calculates an uplink resource required to grant to a terminal by a base station according to a split bearer data ratio, and then performs uplink resource grant.
    Type: Grant
    Filed: May 26, 2016
    Date of Patent: January 1, 2019
    Assignee: SHANGHAI RESEARCH CENTER FOR WIRELESS COMMUNICATIONS
    Inventors: Yu Zeng, Yuanping Zhu, Ting Zhou, Yang Yang, Honglin Hu, Haifeng Wang
  • Patent number: 10153828
    Abstract: The present invention provides a system and method for avoiding mobile relay interference to a primary system on an authorized frequency spectrum.
    Type: Grant
    Filed: June 25, 2014
    Date of Patent: December 11, 2018
    Assignee: SHANGHAI RESEARCH CENTER FOR WIRELESS COMMUNICATIONS
    Inventors: Huiyue Yi, Rui Wang, Honglin Hu, Haitao Li, Kodo Shu
  • Patent number: 10142986
    Abstract: The present invention discloses an uplink resource sharing method, base station and terminal, wherein, the uplink resource sharing method comprises: performing the LBT on a granted subframe, allocated to a terminal by a base station, by the terminal; transmitting data if the LBT is finished on the granted subframe; and performing the LBT on another subframe if the LBT is not finished on the granted subframe. The present invention solves the problem of resource waste caused by the fact that the terminal cannot finish LBT in a frame allocated to the frame by a base station, and reduces a probability of increase of an uplink grant number caused by failing of uplink scheduling.
    Type: Grant
    Filed: May 27, 2016
    Date of Patent: November 27, 2018
    Assignee: SHANGHAI RESEARCH CENTER FOR WIRELESS COMMUNICATIONS
    Inventors: Han Yu, Rui Wang, Yameng Li, Yang Yang, Honglin Hu, Haifeng Wang
  • Patent number: 10064137
    Abstract: A hybrid monitoring-sleeping method of wireless sensor and the wireless sensor are provided by the present invention, during N (N=N1+N2) monitoring-sleeping period, the wireless sensor monitors with the first monitoring duration, the wake-up data packet transmitted by the data acquisitor or the mobile terminal in the N1 monitoring-sleeping periods, and the wireless sensor monitors with the second monitoring duration, the wake-up data packet transmitted by the mobile terminal in the remaining N2 monitoring-sleeping periods. The first monitoring duration is longer than the second monitoring duration, N1 is less than or equal to N2, and the N1 first monitoring duration and the N2 second monitoring duration are alternatively distributed. Compared with the single monitoring duration used in the prior art, the total monitoring duration of the N monitoring-sleeping periods is reduced, as a result, the monitoring power consumption of the wireless sensor is also reduced.
    Type: Grant
    Filed: December 16, 2016
    Date of Patent: August 28, 2018
    Assignee: SHANGHAI RESEARCH CENTER FOR WIRELESS COMMUNICATIONS
    Inventors: Wei Cao, Yu Zhang, Hua Qian, Yang Yang, Honglin Hu
  • Publication number: 20180192382
    Abstract: The present invention discloses a detection method, a synchronization method, and a terminal for a symmetrical synchronization signal. The detection method includes the following steps: obtaining a received signal of a synchronization signal for synchronous detection, and subsequently, performing an auto-correlation calculation on the received signal twice in the time domain, where the received signal includes a first-part received signal whose length is N and a second-part received signal whose length is NCP, the first-part received signal is symmetrical about a first central point, and the second-part received signal is symmetrical about a second central point. With low complexity of calculation and good detection performance, and being insensitive to a carrier frequency offset (CFO), the present invention is particularly applicable to an Internet of Things (IoT) environment.
    Type: Application
    Filed: August 8, 2017
    Publication date: July 5, 2018
    Applicant: Shanghai Research Center For Wireless Communications
    Inventors: Hui-yue YI, Jiang Wang, Jing XU, Yang YANG, Hai-feng WANG
  • Patent number: 9893850
    Abstract: The present invention provides an authorized shared access (ASA) assisted interference coordination method in a heterogeneous time-division duplexing (TDD) relay network. In a TDD relay system architecture, an ASA controller assists a secondary system to perform an interference coordination mechanism by adjusting a time slot structure configuration and synchronization information, and a mobility management entity (MME) obtains a time slot configuration and the synchronization information of a primary system through ASA, and selects, according to relevant information of a relay node inside a management range, an optimal time slot configuration and a working mode for the relay node.
    Type: Grant
    Filed: April 18, 2014
    Date of Patent: February 13, 2018
    Assignee: Shanghai Research Center for Wireless Communications
    Inventors: Yuling Ouyang, Honglin Hu, Haitao Li, Kodo Shu
  • Patent number: 9749872
    Abstract: Disclosed is a network frequency spectrum sharing method, a user terminal of the present network sending a network signal strength measurement report of the different network to a home base station; an operation management node of the present network, based on the network signal strength measurement report, calculating a network overlapping level indicator of the different network, and obtaining network overlapping topology-based information of the different network; and the two networks exchanging the network overlapping topology-based information, and calculating a policy for allocating shared frequency spectrum resources therebetween. The present invention can enable different networks to fairly and reasonably share frequency spectrum resources within a specified range, thus increasing a frequency spectrum utilization rate.
    Type: Grant
    Filed: January 23, 2015
    Date of Patent: August 29, 2017
    Assignee: SHANGHAI RESEARCH CENTER FOR WIRELESS COMMUNICATIONS
    Inventors: Yuanping Zhu, Jiang Wang, Qiaoling Yu, Yong Teng, Kari Horneman
  • Patent number: 9426812
    Abstract: A spectrum allocation method for a cellular network is presented. The method includes: abstracting a cellular network into an interference pattern using a graph theory-based spectrum distribution model; a network node establishing a stakeholder list to represent whether a spectrum can be shared with other network nodes; by obtaining stakeholder lists from other network nodes, calculating a fairness coefficient and determining a lower bound value for the number of spectrum resources which are used; meanwhile, each network node sending out a value related to the fairness coefficient, thereby enables calculate an upper bound value for the number of resources which can be obtained according to the obtained information, to effectively compete for free resources.
    Type: Grant
    Filed: December 25, 2012
    Date of Patent: August 23, 2016
    Assignee: SHANGHAI RESEARCH CENTER FOR WIRELESS COMMUNICATIONS
    Inventors: Shuangdie Wang, Jiang Wang, Jing Xu, Yong Teng, Horneman Kari
  • Publication number: 20160182139
    Abstract: The present invention provides a system and method for avoiding mobile relay interference to a primary system on an authorized frequency spectrum.
    Type: Application
    Filed: June 25, 2014
    Publication date: June 23, 2016
    Applicant: Shanghai Research Center for Wireless Communications
    Inventors: Huiyue YI, Rui WANG, Honglin HU, Haitao LI, Kodo SHU
  • Publication number: 20160020893
    Abstract: The invention provides an uplink and downlink slot time resource configuration method based on interference perception in a TDD system, which is applied to a communication network comprising a source base station, a target base station, as well as a user terminal in the source base station and a user terminal in the target base station, and the method comprises: judging whether the base station-to-base station interference is larger than a preset threshold value or not, if yes, canceling the uplink and downlink slot time resource configuration, and if no, continuously executing the next step; judging whether the interference measurement of the target base station on the user terminal in the source base station is larger than a preset threshold value or not, if no, executing the uplink and downlink slot time resource configuration, and if yes, executing the next step; judging whether the interference measurement of the source base station on the user terminal in the target base station is larger than a preset
    Type: Application
    Filed: December 19, 2013
    Publication date: January 21, 2016
    Applicant: SHANGHAI RESEARCH CENTER FOR WIRELESS COMMUNICATIONS
    Inventors: XIAO TONG, JIANG WANG, TAO PENG, JING XU, YONG TENG, HORNEMAN KARI
  • Patent number: 9083385
    Abstract: A channel decoding method and decoder are disclosed. The decoding method is based on a Circular Viterbi Algorithm (CVA), rules out impossible initial states one by one through iterations according the received soft information sequence, and finally finds the global optimal tail-biting path. In the present invention, all impossible iterations are ruled out through multiple iterations, and only the initial state having most likelihood with the received sequence survives. The algorithm is finally convergent to an optimal tail-biting path to be output. In addition, the method also updates a metric of a maximum likelihood tail-biting path (MLTBP) or rules out impossible initial states through the obtained surviving tail-biting path, thereby effectively solving the problem that the algorithm is not convergent due to a circular trap, providing a practical optimal decoding algorithm for a tail-biting convolutional code, reducing the complexity of an existing decoding scheme, and saving the storage space.
    Type: Grant
    Filed: March 19, 2012
    Date of Patent: July 14, 2015
    Assignee: SHANGHAI RESEARCH CENTER FOR WIRELESS COMMUNICATIONS
    Inventors: Xiaotao Wang, Hua Qian, Jing Xu, Hao Huang, Yang Yang, Fang Wang