Patents by Inventor Bijun Zhang
Bijun Zhang has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 9480021Abstract: A terminal comprises: an electric quantity acquisition unit for acquiring the real-time electric quantity of a battery of the terminal; an electric quantity judgment unit for judging whether the real-time electric quantity of the battery is lower than a preset electric quantity value; and a state adjustment unit for adjusting the state of a working component in the terminal in the case that the judgment result of the electric quantity judgment unit is yes. The working state of the terminal may be adjusted according to the real-time electric quantity of the battery of the terminal, the problem that the battery output voltage of the terminal suddenly decreases below the safe working voltage of hardware thereof is solved, the operating stability of the terminal is ensured while taking the performance of the terminal into account.Type: GrantFiled: August 29, 2012Date of Patent: October 25, 2016Assignees: YULONG COMPUTER TELECOMMUNICATION SCIENTIFIC (SHENZHEN) CO., LTD., DONGGUAN YULONG TELECOMMUNICATION TECH CO., LTD.Inventors: Yihua Niu, Bijun Zhang, Chunsong Feng
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Publication number: 20150208356Abstract: A terminal comprises: an electric quantity acquisition unit for acquiring the real-time electric quantity of a battery of the terminal; an electric quantity judgment unit for judging whether the real-time electric quantity of the battery is lower than a preset electric quantity value; and a state adjustment unit for adjusting the state of a working component in the terminal in the case that the judgment result of the electric quantity judgment unit is yes. The working state of the terminal may be adjusted according to the real-time electric quantity of the battery of the terminal, the problem that the battery output voltage of the terminal suddenly decreases below the safe working voltage of hardware thereof is solved, the operating stability of the terminal is ensured while taking the performance of the terminal into account.Type: ApplicationFiled: August 29, 2012Publication date: July 23, 2015Applicants: YULONG COMPUTER TELECOMMUNICATION SCIENTIFIC (SHENZHEN) CO., LTD., DONGGUAN YULONG TELECOMMUNICATION TECH CO., LTD.Inventors: Yihua Niu, Bijun Zhang, Chunsong Feng
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Patent number: 8879470Abstract: The present invention proposes a method, device and base station for cooperative beam forming based on MBMS fixed grid of beams GoB. The cooperative beam forming method comprises following steps: grouping users into cell central user group and cell edge user group (S701); performing cell central user group multiplexing based on superposition coding (S702); performing cooperative beam forming operation based on fixed grid of beams GoB for cell edge user group (S703).Type: GrantFiled: February 27, 2009Date of Patent: November 4, 2014Assignee: Alcatel LucentInventors: Bijun Zhang, He Wang, Zhongji Hu
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Patent number: 8705472Abstract: In order to reduce the amount of feedback information for specifying a precoding weight, the mobile station apparatus generates a control signal for specifying the precoding weight using bits representing a rank indicator (RI) and bits representing a precoding matrix indicator (PMI) from a bit space, including a plurality of bits representing the RI and a plurality of bits representing the PMI, in which the same bits representing the RI are allocated to a plurality of ranks equal to or higher than a predetermined rank. The control signal is transmitted in uplink using the antennas.Type: GrantFiled: April 5, 2011Date of Patent: April 22, 2014Assignee: NTT DoCoMo, Inc.Inventors: Hidekazu Taoka, Bijun Zhang, Xiaoming She
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Patent number: 8667356Abstract: Disclosed is a method for triggering retransmission in a multicast system, including a base station eNB setting a retransmission condition based on a channel state indication and transmitting the set retransmission condition to a user equipment UE; and the UE comparing the current channel state indication of the UE with the received retransmission condition when receiving an error block, and feeding back a NACK signaling to the eNB trigger a retransmission when the retransmission condition is satisfied. The method according to the present invention is to restrict the trigger of the NACK signaling, by setting the condition of the UE feeding back the NACK signaling when the UE received the error block. Then the feedback signaling on the uplink channel would be restricted, and the retransmission probability would be limited in an appropriate region as in Rel 6 HSDPA, therefore the optimal ratio of efficiency over power would be achieved.Type: GrantFiled: August 20, 2007Date of Patent: March 4, 2014Assignee: Alcatel LucentInventors: Yonggang Wang, Bernd Haberland, Pingping Xing, Bijun Zhang
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Publication number: 20130114513Abstract: In order to reduce the amount of feedback information for specifying a precoding weight, the mobile station apparatus generates a control signal for specifying the precoding weight using bits representing a rank indicator (RI) and bits representing a precoding matrix indicator (PMI) from a bit space, including a plurality of bits representing the RI and a plurality of bits representing the PMI, in which the same bits representing the RI are allocated to a plurality of ranks equal to or higher than a predetermined rank. The control signal is transmitted in uplink using the antennas.Type: ApplicationFiled: April 5, 2011Publication date: May 9, 2013Applicant: NTT DOCOMO, INC.Inventors: Hidekazu Taoka, Bijun Zhang, Xiaoming She
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Patent number: 8345610Abstract: Disclosed is a method for mapping pilot signals in a multiplexing mode of unicast service and Multimedia Broadcast/Multicast Service (MBMS). The method comprises the steps of: generating pilot symbols for the unicast service and the MBMS service, respectively; mapping the pilot symbols for the MBMS service to multiple transmit antennas such that, in a subframe, the pilot symbols for the MBMS service for each antenna are arranged in a same time domain and adjacent to each other, the pilot symbols for the MBMS service for the same transmit antenna are spaced from each other by a predetermined number of subcarriers in the frequency domain and by a predetermined number of OFDM symbols in the time domain, and the pilot symbols for the MBMS service for the same transmit antenna are arranged in a staggered form along the time domain, and mapping the pilot symbols for the unicast service at the same time.Type: GrantFiled: June 18, 2007Date of Patent: January 1, 2013Assignee: Alcatel LucentInventors: Bijun Zhang, Yu Chen, Zhongji Hu, Yonggang Wang
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Publication number: 20120231739Abstract: A method is provided for communications in a cellular network (1) comprising a plurality of mobile stations (MS1 to MS3) adapted for performing wireless communications with at least one base station (BS1, BS2) using a first transmission technology, the method comprising: forming a cooperating cluster (C) comprising two or more of the mobile stations (MS1, MS2), and performing short-range communications between the mobile stations (MS1, MS2) of the cooperating cluster (C) using a second transmission technology being different from the first transmission technology for improving, for at least one mobile station (MS1, MS2) of the cluster (C), the performance of the wireless communications with the base station (BS), preferably by using MIMO techniques for at least one of interference suppression and cancellation, in particular by using at least one of transmit precoding for uplink transmissions and receive antenna weighting for downlink reception.Type: ApplicationFiled: November 23, 2009Publication date: September 13, 2012Inventors: Yu Chen, Bijun Zhang, Thorsten Wild
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Publication number: 20120002741Abstract: A method for controlling, in collaborative MIMO of a wireless communication network, downlink service data in collaborative MIMO to perform content synchronization is provided in the present invention. The method comprises: performing, by a serving base station in the collaborative MIMO, data link layer processing on service data to be transmitted to a mobile station, so as to achieve a first data packet, and transmitting the first data packet to other collaborative base station(s) in the collaborative MIMO; thereafter, transmitting, by each base station (which may or may not include the serving base station) participating in transmitting data packets in the collaborative MIMO, the first data packet to the mobile station on the same time-frequency resource. With the technical solution of the present invention, it can be realized effectively that each base station in the collaborative MIMO transmits the same data to the mobile station on the same time-frequency resource.Type: ApplicationFiled: March 12, 2009Publication date: January 5, 2012Inventors: He Wang, Bijun Zhang, Zhongji Hu
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Publication number: 20110305164Abstract: The present invention proposes a method, device and base station for cooperative beam forming based on MBMS fixed grid of beams GoB. The cooperative beam forming method comprises following steps: grouping users into cell central user group and cell edge user group (S701); performing cell central user group multiplexing based on superposition coding (S702); performing cooperative beam forming operation based on fixed grid of beams GoB for cell edge user group (S703).Type: ApplicationFiled: February 27, 2009Publication date: December 15, 2011Inventors: Bijun Zhang, He Wang, Zhongji Hu
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Publication number: 20110219281Abstract: Disclosed is a method for triggering retransmission in a multicast system, comprising steps of: a base station eNB setting a retransmission condition based on a channel state indication and transmitting the set retransmission condition to a user equipment UE; and the UE comparing the current channel state indication of the UE with the received retransmission condition when receiving an error block, and feeding back a NACK signaling to the eNB trigger a retransmission when the retransmission condition is satisfied. The method according to the present invention is to restrict the trigger of the NACK signaling, by setting the condition of the UE feeding back the NACK signaling when the UE received the error block. Then the feedback signaling on the uplink channel would be restricted, and the retransmission probability would be limited in an appropriate region as in Rel 6 HSDPA, therefore the optimal ratio of efficiency over power would be achieved.Type: ApplicationFiled: August 20, 2007Publication date: September 8, 2011Inventors: Yonggang Wang, Bemd Haberland, Pingping Xing, Bijun Zhang
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Publication number: 20100302002Abstract: A method for monitoring a main machine, a monitoring apparatus and a main machine are provided. The method for monitoring the main machine includes paging, by a monitoring apparatus, a main machine within an effective area, returning, by a main machine being paged, apparatus information of the main machine; determining at least one main machine as a monitored main machine according to the apparatus information returned by the at least one main machine; establishing a monitoring connection relationship with each monitored main machine; and monitoring an emergent event of the at least one monitored main machine or inquiring about a working status of the at least one monitored main machine by using the monitoring connection relationship established.Type: ApplicationFiled: August 2, 2010Publication date: December 2, 2010Applicant: Yulong Computer Telecommunication Technologies (Shenzhen) Co., Ltd.Inventors: Deying Guo, Jun Li, Wei Zhang, Penghui Yang, Jianrong Ye, Huaxing Chen, Zuohua Zhou, Dengke Wang, Chundong Fang, Yantao Zhao, Bijun Zhang
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Publication number: 20100172282Abstract: Disclosed is a method for mapping pilot signals in a multiplexing mode of unicast service and Multimedia Broadcast/Multicast Service (MBMS). The method comprises the steps of: generating pilot symbols for the unicast service and the MBMS service, respectively; mapping the pilot symbols for the MBMS service to multiple transmit antennas such that, in a subframe, the pilot symbols for the MBMS service for each antenna are arranged in a same time domain and adjacent to each other, the pilot symbols for the MBMS service for the same transmit antenna are spaced from each other by a predetermined number of subcarriers in the frequency domain and by a predetermined number of OFDM symbols in the time domain, and the pilot symbols for the MBMS service for the same transmit antenna are arranged in a staggered form along the time domain, and mapping the pilot symbols for the unicast service at the same time.Type: ApplicationFiled: June 18, 2007Publication date: July 8, 2010Inventors: Bijun Zhang, Yu Chen, Zhongji Hu, Yonggang Wang