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1.发明申请公开(公告)号：US20200162878A1
公开(公告)日：2020-05-21
申请号：US16626499
申请日：2018-07-17
摘要： In vehicular communication networks, reliable delivery of safety messages is crucial and any transmission collision is to be avoided. A method based on time division multiple access scheme is described. An extra layer is provided to manage and schedule transmission of safety messages. The extra, message broadcasting handling layer (MBH layer) is provided between safety applications and medium access control (MAC) layer. Safety messages generated and received from safety application is spooled in the MBH layer and scheduled by the MBH layer for delivery to the MAC layer for broadcasting. A device to implement the method is also described.
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公开(公告)号：US10721670B2
公开(公告)日：2020-07-21
申请号：US16312107
申请日：2017-06-27
IPC分类号： H04L12/28 , H04W40/02 , H04W88/04 , H04W76/40 , H04W40/12 , H04W4/40 , H04K3/00 , H04W40/22 , H04W40/24 , H04W48/16 , H04W48/18 , H04W72/04 , H04W74/08 , H04B7/26 , H04J3/00 , H04W28/04 , H04W84/18
摘要： In vehicular ad hoc networks (VANETs), vehicles communicate either with each other via vehicle-to-vehicle (V2V) communication or with stationary road side infrastructure or road side units (RSUs) via vehicle-to-infrastructure (V2I) communication, to exchange information generated by the mobile applications. Vehicular networks require a reliable and efficient one-hop broadcast service. A makeup strategy for vehicular networks, referred to as cooperative relay broadcasting (CRB), is described. Neighboring nodes rebroadcast the packet from a source node to increase the reliability of the broadcast service. The decision to perform CRB is taken proactively and based on the channel conditions between the relaying nodes and the target one-hop neighbors.
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公开(公告)号：US20190239137A1
公开(公告)日：2019-08-01
申请号：US16312107
申请日：2017-06-27
IPC分类号： H04W40/02 , H04W48/16 , H04W48/18 , H04W4/40 , H04W40/24 , H04W40/22 , H04W74/08 , H04W72/04 , H04K3/00
CPC分类号： H04W40/026 , H04B7/2606 , H04J3/00 , H04K3/41 , H04W4/40 , H04W28/04 , H04W40/12 , H04W40/22 , H04W40/246 , H04W48/16 , H04W48/18 , H04W72/0446 , H04W74/0816 , H04W76/40 , H04W84/18 , H04W88/04
摘要： In vehicular ad hoc networks (VANETs), vehicles communicate either with each other via vehicle-to-vehicle (V2V) communication or with stationary road side infrastructure or road side units (RSUs) via vehicle-to-infrastructure (V2I) communication, to exchange information generated by the mobile applications. Vehicular networks require a reliable and efficient one-hop broadcast service. A makeup strategy for vehicular networks, referred to as cooperative relay broadcasting (CRB), is described. Neighboring nodes rebroadcast the packet from a source node to increase the reliability of the broadcast service. The decision to perform CRB is taken proactively and based on the channel conditions between the relaying nodes and the target one-hop neighbors.
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公开(公告)号：US10299232B2
公开(公告)日：2019-05-21
申请号：US15519526
申请日：2015-10-14
申请人： Xuemin Shen , Hassan Aboubakr Omar , Ning Lu , Sailesh Bharati , Weihua Zhuang
发明人： Xuemin Shen , Hassan Aboubakr Omar , Ning Lu , Sailesh Bharati , Weihua Zhuang
摘要： The invention generally relates to the field of vehicular communications. In particular, the invention relates to method, system and apparatus for establishing and maintaining vehicular communications, such as wireless vehicular communications in a vehicular ad hoc network (VANET).
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公开(公告)号：US20240357638A1
公开(公告)日：2024-10-24
申请号：US18639577
申请日：2024-04-18
发明人： Weihua ZHUANG , Jie GAO , Xuemin SHEN , Xu LI
IPC分类号： H04W74/04 , H04W72/0446 , H04W74/00 , H04W74/0816
CPC分类号： H04W74/04 , H04W72/0446 , H04W74/006 , H04W74/0816
摘要： A method, apparatus and system for medium access control is provided. Time slots configured to include mini slots at the beginnings thereof. Devices are assigned time slot, mini slot combinations as transmission opportunities. A device can attempt to use a transmission opportunity when it has a packet to send, by beginning data transmission in its assigned slot and mini slot and potentially continuing the transmission up until the end of the assigned slot. If another device is already transmitting in the assigned slot, the device refrains from using its transmission opportunity. Higher priority devices can be assigned transmission opportunities corresponding to earlier mini slots within a slot. In some embodiments, multiple devices can be assigned the same transmission opportunity and a collision detection mechanism can be employed. In some embodiments, all devices detect if a slot is idle and advance the beginning of the next slot upon such detection.
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公开(公告)号：US11991744B2
公开(公告)日：2024-05-21
申请号：US17837141
申请日：2022-06-10
发明人： Weihua Zhuang , Jie Gao , Xuemin Shen , Xu Li
IPC分类号： H04W74/08 , H04W72/0446 , H04W74/00 , H04W74/04 , H04W74/0816
CPC分类号： H04W74/04 , H04W72/0446 , H04W74/006 , H04W74/0816
摘要： A method, apparatus and system for medium access control is provided. Time slots configured to include mini slots at the beginnings thereof. Devices are assigned time slot, mini slot combinations as transmission opportunities. A device can attempt to use a transmission opportunity when it has a packet to send, by beginning data transmission in its assigned slot and mini slot and potentially continuing the transmission up until the end of the assigned slot. If another device is already transmitting in the assigned slot, the device refrains from using its transmission opportunity. Higher priority devices can be assigned transmission opportunities corresponding to earlier mini slots within a slot. In some embodiments, multiple devices can be assigned the same transmission opportunity and a collision detection mechanism can be employed. In some embodiments, all devices detect if a slot is idle and advance the beginning of the next slot upon such detection.
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公开(公告)号：US20220039153A1
公开(公告)日：2022-02-03
申请号：US16945334
申请日：2020-07-31
发明人： Weihua ZHUANG , Jie GAO , Xuemin SHEN , Xu LI
摘要： A method, apparatus and system for medium access control is provided. Time slots configured to include mini slots at the beginnings thereof. Devices are assigned time slot, mini slot combinations as transmission opportunities. A device can attempt to use a transmission opportunity when it has a packet to send, by beginning data transmission in its assigned slot and mini slot and potentially continuing the transmission up until the end of the assigned slot. If another device is already transmitting in the assigned slot, the device refrains from using its transmission opportunity. Higher priority devices can be assigned transmission opportunities corresponding to earlier mini slots within a slot. In some embodiments, multiple devices can be assigned the same transmission opportunity and a collision detection mechanism can be employed. In some embodiments, all devices detect if a slot is idle and advance the beginning of the next slot upon such detection.
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公开(公告)号：US11425549B2
公开(公告)日：2022-08-23
申请号：US16626499
申请日：2018-07-17
IPC分类号： H04W4/90 , H04W72/04 , H04W4/06 , H04W76/10 , H04J3/16 , H04J3/06 , H04W4/40 , H04W4/80 , G01S19/13
摘要： In vehicular communication networks, reliable delivery of safety messages is crucial and any transmission collision is to be avoided. A method based on time division multiple access scheme is described. An extra layer is provided to manage and schedule transmission of safety messages. The extra, message broadcasting handling layer (MBH layer) is provided between safety applications and medium access control (MAC) layer. Safety messages generated and received from safety application is spooled in the MBH layer and scheduled by the MBH layer for delivery to the MAC layer for broadcasting. A device to implement the method is also described.
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公开(公告)号：US11363629B2
公开(公告)日：2022-06-14
申请号：US16945334
申请日：2020-07-31
发明人： Weihua Zhuang , Jie Gao , Xuemin Shen , Xu Li
摘要： A method, apparatus and system for medium access control is provided. Time slots configured to include mini slots at the beginnings thereof. Devices are assigned time slot, mini slot combinations as transmission opportunities. A device can attempt to use a transmission opportunity when it has a packet to send, by beginning data transmission in its assigned slot and mini slot and potentially continuing the transmission up until the end of the assigned slot. If another device is already transmitting in the assigned slot, the device refrains from using its transmission opportunity. Higher priority devices can be assigned transmission opportunities corresponding to earlier mini slots within a slot. In some embodiments, multiple devices can be assigned the same transmission opportunity and a collision detection mechanism can be employed. In some embodiments, all devices detect if a slot is idle and advance the beginning of the next slot upon such detection.
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公开(公告)号：US20170238270A1
公开(公告)日：2017-08-17
申请号：US15519526
申请日：2015-10-14
申请人： Xuemin SHEN , Hassan Aboubakr OMAR , Ning LU , Sailesh BHARATI , Weihua ZHUANG
发明人： Xuemin SHEN , Hassan Aboubakr OMAR , Ning LU , Sailesh BHARATI , Weihua ZHUANG
CPC分类号： H04W56/001 , G08B21/18 , H04J3/0644 , H04J3/0655 , H04W4/046 , H04W4/12 , H04W56/00 , H04W72/0446 , H04W76/10 , H04W84/18
摘要： The invention generally relates to the field of vehicular communications. In particular, the invention relates to method, system and apparatus for establishing and maintaining vehicular communications, such as wireless vehicular communications in a vehicular ad hoc network (VANET).
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