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

IPC分类号： H04W56/00 ,  G08B21/18 ,  H04W4/04 ,  H04W72/04 ,  H04W76/02

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).

公开(公告)号：US20240357638A1

公开(公告)日：2024-10-24

申请号：US18639577

申请日：2024-04-18

申请人： Xuemin SHEN ,  Weihua ZHUANG ,  Jie GAO ,  HUAWEI TECHNOLOGIES CANADA CO., LTD.

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.

公开(公告)号：US20220039153A1

公开(公告)日：2022-02-03

申请号：US16945334

申请日：2020-07-31

申请人： Xuemin SHEN ,  Weihua ZHUANG ,  Jie GAO ,  Huawei Technologies Canada Co., Ltd.

发明人： Weihua ZHUANG ,  Jie GAO ,  Xuemin SHEN ,  Xu LI

IPC分类号： H04W74/04 ,  H04W74/00 ,  H04W74/08 ,  H04W72/04

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.

公开(公告)号：US20190268741A1

公开(公告)日：2019-08-29

申请号：US16346023

申请日：2017-10-31

申请人： Xuemin SHEN ,  Wenchao XU ,  Haibo ZHOU

发明人： Xuemin SHEN ,  Wenchao XU ,  Haibo ZHOU

IPC分类号： H04W4/44 ,  H04W12/06 ,  H04W48/12 ,  H04W76/14 ,  H04W4/48 ,  H04W8/26 ,  H04W28/22 ,  H04W72/12 ,  H04W12/00

摘要： A system and method for providing improved in-vehicle wireless connection to roadside access devices for connection to network is described. The system includes an in-vehicle device, one or more roadside access devices, a cloud management server, and backhaul Internet access connection. The roadside access device includes in its broadcasted beacon frame message information required by an in-vehicle device to set network connection parameters. The in-vehicle device automatically connects to roadside access devices for access to the network, using information included in the broadcasted beacon frame message. The in-vehicle device also manages and categorizes data traffic, maps user priority assigned to data traffic to network transmission priority, and adapts transmission rates to network condition, such as backhaul network bandwidth available, number of mobile users connected to the same roadside access devices and data traffic load, among others.