Patents by Inventor Pei Liu
Pei Liu 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).
-
Patent number: 8611271Abstract: A distributed and opportunistic medium access control (MAC) layer protocol for randomized distributed space-time coding (R-DSTC), which may be deployed in an IEEE 802.11 wireless local area network (WLAN), is described. Unlike other cooperative MAC designs, there is no need to predetermine, before packet transmission, which stations will serve as relays. Instead, the MAC layer protocol opportunistically recruits relay stations on the fly. Network capacity and delay performance is much better than legacy IEEE 802.11g network, and even cooperative forwarding using one relay station. Avoiding the need to collect the station-to-station channel statistics considerably reduces overhead otherwise required for channel measurement and signaling.Type: GrantFiled: November 2, 2010Date of Patent: December 17, 2013Assignee: Polytechnic Institute of New York UniversityInventors: Elza Erkip, Pei Liu, Chun Nie, Shivendra S. Panwar
-
Publication number: 20130316625Abstract: A grinding machine with 5-axis for cutters is disclosed, the grinding machine includes a grinding machine base (12) with an circular upper horizontal surface and a pillar (56) provided on one side of the grinding machine base, the pillar is curved with a radian of 180° along a side edge of the base, a groove body (63) on the circular base is enclosed by a curved vertical plate on the another side edge, and the height of vertical plate is lower than that of the pillar.Type: ApplicationFiled: July 31, 2013Publication date: November 28, 2013Applicant: DALIAN KEDE NUMERICAL CONTROL CO., LTD.Inventors: Dehai YU, Junmin ZHENG, Hongqi CHEN, Chungang CAI, Xingjian HE, Jingming LI, Hu CHEN, Yang LIN, Meng LIN, Pei LIU, Changlin DU, Zidan JU
-
Patent number: 8576876Abstract: Methods and systems for determining and optimizing a throughput of a short range wireless network are provided. The method mainly includes acquiring respective time parameters in a contention access period based on information transmission characteristics of the short range wireless network; and computing and optimizing the throughput of the short range wireless network based on the respective time parameters. These time parameters are determined based on a non-persistent Carrier Sense Multiple Access CSMA mechanism. Therefore, the present invention employs a non-persistent CSMA mechanism to analyze the CAP of a short range wireless network and thus simplifies complexity in determining the network throughput and the analysis process of network optimization. As such, accurate throughput parameters of the standard network of the short range wireless network may be obtained, the network performance may be optimized and the performance of the short range wireless network is improved.Type: GrantFiled: May 29, 2012Date of Patent: November 5, 2013Assignee: Huawei Technologies Co., Ltd.Inventors: Yijin Zhang, Pingping Xu, Pei Liu
-
Patent number: 8509288Abstract: Multiple cooperative relays operate in a highly mobile environment and form a virtual antenna array. Multiple independent streams of data can be simultaneously, transmitted in parallel to the destination receiver. Thus a higher spatial multiplexing gain can be obtained. Each relay device that receives the information without errors splits it into multiple streams. For example, if the relay devices receive B symbols and the number of streams is K, each stream contains B/K symbols. Each relay device then generates a random linear combination of all the streams and transmits this output simultaneously with the other relay devices.Type: GrantFiled: June 4, 2009Date of Patent: August 13, 2013Assignee: Polytechnic Institute of New York UniversityInventors: Elza Erkip, Thanasis Korakis, Pei Liu, Shivendra S. Panwar
-
Patent number: 8435054Abstract: An electronic device includes an enclosure, a connector, a connector cover, and a resisting member. The enclosure defines at least one opening. The connector is disposed in the enclosure and corresponding to the at least one opening of the enclosure. The connector cover covers the opening to protect the connector and includes pivot shaft. The pivot shaft is rotatably connected to the enclosure. The resisting member elastically resists against the connector cover. The resisting member may be formed by a spring biased block that presses in an end of the pivot shaft to maintain the cover in open or closed position. A restricting member may be located in the opening to limit cover rotation in both open and closed positions.Type: GrantFiled: January 26, 2011Date of Patent: May 7, 2013Assignees: Ambit Microsystems (Shanghai) Ltd., Hon Hai Precision Industry Co., Ltd.Inventor: Pei Liu
-
Patent number: 8380262Abstract: A slide phone includes a first body, a main sheet, a second body, a pair of lever, a keypad, and a pair of supports. The main sheet is mounted on the first body. The second body is slidably installed on the main sheet and capable of moving relative to the first body. When the slide phone is closed, the second body forms a receiving space together with the first body. The levers are positioned to opposite sides of the first body. The keypad is mounted on the levers and can be accommodated in the receiving space when the slide phone is closed, and can be lifted by the levers to be substantially coplanar with an upper surface of the second body when the slide phone is opened. The pair of supports is mounted on the first body adjacent to the lever correspondingly.Type: GrantFiled: January 20, 2010Date of Patent: February 19, 2013Assignees: Ambit Microsystems (Shanghai) Ltd., Hon Hai Precision Industry Co., Ltd.Inventors: Pei Liu, Xin-Long Fang, Wen-Jia Ren, Jin-Shui Chen, Zhong-You Li, Zhan-Xing Ma
-
Patent number: 8365115Abstract: A system and method for performance modeling of integrated circuits is provided. A method for performing timing analysis on an integrated circuit is provided, the integrated circuit having a timing path. The method includes computing a number of non-common timing path elements in the timing path, assigning a timing de-rate factor to the timing path based on the number of non-common timing path elements, and computing a timing analysis on the integrated circuit using the assigned timing de-rate factor.Type: GrantFiled: December 3, 2009Date of Patent: January 29, 2013Assignee: Taiwan Semiconductor Manufacturing Company, Ltd.Inventors: Louis Chao-Chiuan Liu, Morly Hsieh, Dei-Pei Liu
-
Patent number: 8325690Abstract: A method and a coordinator of superframe management are disclosed. The method includes receiving, by a coordinator, a GTS request from a node; determining the type of the node; allocating GTS in an active period based on GTS characteristics carried in the GTS request when the node is determined as an energy restricted device; allocating GTS in an active period and an inactive period based on GTS characteristics carried in the GTS request when the node is determined as an energy unrestricted device. As can be seen from the method of the present invention, for an energy unrestricted device, allocated GTS may extend to an inactive period. Since the length of slots allocated to the energy unrestricted node is extended, the QoS of the energy unrestricted node is improved and guaranteed. Meanwhile, since the method of the present invention considers and makes full use of the inactive period in the superframe, the network throughput is improved significantly.Type: GrantFiled: June 19, 2009Date of Patent: December 4, 2012Assignee: Huawei Technologies Co., Ltd.Inventor: Pei Liu
-
Publication number: 20120288893Abstract: A seed-specific expression vector and its construction methods and applications are disclosed. A fusion protein expression cassette consisting of Arachis hypogaea oleosin gene-apolipopoprotein A-IMilano (A-IM) gene driven by Brassica napus oleosin gene promoter is inserted between the HindIII and SacI sites of a plant binary expression vector pBI121, obtaining the plant expression vector pBINOA of the invention. In addition, a method for producing apolipoprotein A-IMilano is provided, in which the expression vector is used to transform oil sunflower which is used as a plant bioreactor. The method can not only improve the yield of apolipoprotein A-IMilano, but also greatly reduce production costs, and is suitable for industrial production.Type: ApplicationFiled: December 9, 2010Publication date: November 15, 2012Inventors: Shengjun An, Xiqing Chai, Kunsheng Wang, Tiemei Shao, Zhan Jiao, Xin Wen, Xue Li, Pei Liu, Haigang Lu, Yunyu Chen, Lingyuan Hu, Haimin Xu, Chenggang Yu
-
Publication number: 20120230318Abstract: Methods and systems for determining and optimizing a throughput of a short range wireless network are provided. The method mainly includes acquiring respective time parameters in a contention access period based on information transmission characteristics of the short range wireless network; and computing and optimizing the throughput of the short range wireless network based on the respective time parameters. These time parameters are determined based on a non-persistent Carrier Sense Multiple Access CSMA mechanism. Therefore, the present invention employs a non-persistent CSMA mechanism to analyze the CAP of a short range wireless network and thus simplifies complexity in determining the network throughput and the analysis process of network optimization. As such, accurate throughput parameters of the standard network of the short range wireless network may be obtained, the network performance may be optimized and the performance of the short range wireless network is improved.Type: ApplicationFiled: May 29, 2012Publication date: September 13, 2012Applicant: HUAWEI TECHNOLOGIES CO., LTD.Inventors: Yijin Zhang, Pingping Xu, Pei Liu
-
Publication number: 20120218928Abstract: A method and a coordinator of superframe management are disclosed. The method includes receiving, by a coordinator, a GTS request from a node; determining the type of the node; allocating GTS in an active period based on GTS characteristics carried in the GTS request when the node is determined as an energy restricted device; allocating GTS in an active period and an inactive period based on GTS characteristics carried in the GTS request when the node is determined as an energy unrestricted device.Type: ApplicationFiled: March 2, 2012Publication date: August 30, 2012Applicant: HUAWEI TECHNOLOGIES CO., LTD.Inventor: Pei Liu
-
Patent number: 8228836Abstract: Data is transmitted from a source wireless device to a destination wireless device by: (a) discovering node-to-node wireless channel conditions in a wireless network; (b) determining at least one of (A) wireless relay devices, (B) modulation schemes, and (C) transmission rates using the discovered node-to-node channel conditions; (c) signaling at least some of the determined information to the determined wireless relay devices; (d) receiving, with each of the wireless relay devices, a transmission of the data from the source wireless device; and (e) transmitting, with each of the wireless relay devices, a randomized, space-time encoded, part of the received data, to the destination device using the signaled at least some of the determined information.Type: GrantFiled: June 5, 2009Date of Patent: July 24, 2012Assignee: Polytechnic Institute of New York UniversityInventors: Elza Erkip, Thanasis Korakis, Pei Liu, Shivendra S. Panwar, Anna Scaglione
-
Patent number: 8208487Abstract: Methods and systems for determining and optimizing a throughput of a short range wireless network are provided. The method mainly includes acquiring respective time parameters in a contention access period based on information transmission characteristics of the short range wireless network; and computing and optimizing the throughput of the short range wireless network based on the respective time parameters. These time parameters are determined based on a non-persistent Carrier Sense Multiple Access CSMA mechanism. Therefore, the present invention employs a non-persistent CSMA mechanism to analyze the CAP of a short range wireless network and thus simplifies complexity in determining the network throughput and the analysis process of network optimization. As such, accurate throughput parameters of the standard network of the short range wireless network may be obtained, the network performance may be optimized and the performance of the short range wireless network is improved.Type: GrantFiled: March 27, 2009Date of Patent: June 26, 2012Assignee: Huawei Technologies Co., Ltd.Inventors: Yijin Zhang, Pingping Xu, Pei Liu
-
Patent number: 8175003Abstract: When it is advantageous to do so, a wireless LAN station sends data packets to a destination station via an intermediate station, instead of to the destination station directly. That is, the intermediate station, which serves as a helper to the source, forwards packets received from the source station to the intended destination station. This cooperative data transmission approach can result in system performance improvement, as long as the total time consumed by two-hop transmission (i.e., transmission via the helper station) is less than direct transmission. Such a determination may be made using rate information stored at each station. Specifically, using the rate information, signaling needed to set up a transmission, the amount of data to be transmitted, etc., transmitting the data directly and via a help station may be compared.Type: GrantFiled: November 9, 2007Date of Patent: May 8, 2012Assignee: Polytechnic UniversityInventors: Shivendra S. Panwar, Pei Liu, Zhifeng Tao
-
Publication number: 20120028485Abstract: An electronic device includes an enclosure, a connector, a connector cover, and a resisting member. The enclosure defines at least one opening. The connector is disposed in the enclosure and corresponding to the at least one opening of the enclosure. The connector cover covers the opening to protect the connector and includes pivot shaft. The pivot shaft is rotatably connected to the enclosure. The resisting member elastically resists the pivot shaft and the enclosure.Type: ApplicationFiled: January 26, 2011Publication date: February 2, 2012Applicants: HON HAI PRECISION INDUSTRY CO., LTD., AMBIT MICROSYSTEMS (SHANGHAI) LTD.Inventor: PEI LIU
-
Patent number: 8086095Abstract: An audio and video (AV) apparatus includes a player module for playing audio and video files, generating audio and video signals, and an internal display and an internal speaker. The AV apparatus further includes: a first switch for generating first instructions; an output module for being externally connected to output the audio and video signals; and a control module connected to the first switch. The control module being configured for disabling the internal display and internal speaker at receiving the first instructions at a situation that the output module is externally connected to output the audio and video signals, and disabling the internal display while keeping the internal speaker enabled at receiving the first instruction at a situation that the output module is not externally connected. A method for controlling the audio and video apparatus is provided as well.Type: GrantFiled: July 10, 2008Date of Patent: December 27, 2011Assignees: Hong Fu Jin Precision Industry (ShenZhen) Co., Ltd., Hon Hai Precision Industry Co., Ltd.Inventors: Chun-Lung Hung, Tao Wang, Shi-Ming Zhang, Wang-Chang Duan, Wen-Ming Chen, Pei Liu
-
Publication number: 20110216662Abstract: Cooperative communication is a technique that can be employed to meet the increased throughput needs of next generation WiMAX systems. In a cooperative scenario, multiple stations can jointly emulate the antenna elements of a multi-input multi-output system in a distributed fashion. A framework for a randomized distributed space-time coding (“R-DSTC”) technique in the emerging relay-assisted WiMAX network, and the development of a cooperative medium access control (“MAC”) layer protocol, called CoopMAX, for R-DSTC deployment in an IEEE 802.16 system, is described. The technique described couples the MAC layer with the physical (PHY) layer for performance optimization. The PHY layer yields significant diversity gain, while the MAC layer achieves a substantial end-to-end throughput gain.Type: ApplicationFiled: January 21, 2011Publication date: September 8, 2011Inventors: Chun Nie, Pei Liu, Thanasis Korakis, Elza Erkip, Shivendra S. Panwar
-
Patent number: 7967269Abstract: A roller type adjustable screen fixing apparatus includes: a fixing base, having at least one operating slot; at least one distal plate device disposed at an external side of the distal plate, having at least two distal plates embedded in the operating slot, and slidably moving in the operating slot, and a frame plate disposed at an external side of the distal plate; at least one linking device, having at least one roller installed in the operating slot and linked with the distal plate; and a containing space, defined by the upper frame plates of the corresponding distal plates for installing a screen. The distal plate is contractible in the operating slot for adjusting the containing space, such that the invention can fit screens of different sizes, and provide a convenient replacement and a dynamic adjustment.Type: GrantFiled: September 17, 2008Date of Patent: June 28, 2011Assignee: Portwell, Inc.Inventor: Kun-Pei Liu
-
Publication number: 20110110290Abstract: A distributed and opportunistic medium access control (MAC) layer protocol for randomized distributed space-time coding (R-DSTC), which may be deployed in an IEEE 802.11 wireless local area network (WLAN), is described. Unlike other cooperative MAC designs, there is no need to predetermine, before packet transmission, which stations will serve as relays. Instead, the MAC layer protocol opportunistically recruits relay stations on the fly. Network capacity and delay performance is much better than legacy IEEE 802.11g network, and even cooperative forwarding using one relay station. Avoiding the need to collect the station-to-station channel statistics considerably reduces overhead otherwise required for channel measurement and signaling.Type: ApplicationFiled: November 2, 2010Publication date: May 12, 2011Inventors: Elza Erkip, Pei Liu, Chun Nie, Shivendra S. Panwar
-
Publication number: 20110092259Abstract: A slide phone includes a first body, a main sheet, a second body, a pair of lever, a keypad, and a pair of supports. The main sheet is mounted on the first body. The second body is slidably installed on the main sheet and capable of moving relative to the first body. When the slide phone is closed, the second body forms a receiving space together with the first body. The levers are positioned to opposite sides of the first body. The keypad is mounted on the levers and can be accommodated in the receiving space when the slide phone is closed, and can be lifted by the levers to be substantially coplanar with an upper surface of the second body when the slide phone is opened. The pair of supports is mounted on the first body adjacent to the lever correspondingly.Type: ApplicationFiled: January 20, 2010Publication date: April 21, 2011Applicants: AMBIT MICROSYSTEMS (SHANGHAI) LTD., HON HAI PRECISION INDUSTRY CO., LTD.Inventors: PEI LIU, XIN-LONG FANG, WEN-JIA REN, JIN-SHUI CHEN, ZHONG-YOU LI, ZHAN-XING MA