公开(公告)号：US08488545B2

公开(公告)日：2013-07-16

申请号：US13110118

申请日：2011-05-18

Applicant: Chung-Min Chen ,  Yen-Cheng Lai ,  Wanjiun Liao ,  Phone Lin

Inventor： Chung-Min Chen ,  Yen-Cheng Lai ,  Wanjiun Liao ,  Phone Lin

IPC: H04W72/04

CPC classification number: H04W74/08 ,  H04W72/04 ,  H04W84/18

Abstract: In a Vehicular Ad Hoc Network (VANET) a hybrid method combines SDMA (Space Division Multiple Access) and dynamic TDMA (Time Division Multiple Access) that divides the roadway into regions (whose size is larger than the SDMA unit) where each region is allocated a pool of radio channels based on SDMA and may contain a limited number of vehicles. Vehicles within the same region compete for and access the channels using dynamic TDMA. A channel allocation scheme that maps the pool of channels to the regions such that when a vehicle acquires multiple channels (time slots) in a region, the intervals among the channels are as uniform as possible, thus minimizing the waiting time of the messages to be broadcast by the vehicle, which is critical for safety related applications. This solution is referred to as R-SDMA (Region based SDMA).

Abstract translation: 在车载Ad Hoc网络（VANET）中，混合方法将SDMA（空分多址）和动态TDMA（时分多路访问）相结合，将道路划分成每个区域被分配的区域（其尺寸大于SDMA单元） 基于SDMA的无线电频道池可能包含有限数量的车辆。 同一区域内的车辆使用动态TDMA竞争和接入频道。 一种信道分配方案，其将信道池映射到区域，使得当车辆在区域中获取多个信道（时隙）时，信道之间的间隔尽可能一致，从而最小化消息的等待时间 由车辆广播，这对于安全相关应用至关重要。 该解决方案称为R-SDMA（基于区域的SDMA）。