A vehicle communication method and communication node
A vehicle-mounted communication and node technology, applied in the field of wireless communication, can solve problems such as being useless and unable to meet user needs well, and achieve the effect of high transmission rate
Active Publication Date: 2018-03-16
BEIJING NUFRONT MOBILE MULTIMEDIA TECH
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Problems solved by technology
[0010] However, for time-sensitive services, such as car safety information, if a lower transmission rate is used, it may be useless when the receiving node receives the safety information sent by the sending node
[0011] (2) Throughput problem
This method cannot well meet user needs when transferring large amounts of data
Method used
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[0055] The following description and drawings illustrate specific embodiments of the invention sufficiently to enable those skilled in the art to practice them. Other embodiments may incorporate structural, logical, electrical, process, and other changes. The examples merely represent possible variations. Individual components and functions are optional unless explicitly required, and the order of operations may vary. Portions and features of some embodiments may be included in or substituted for those of other embodiments. The scope of embodiments of the present invention includes the full scope of the claims, and all available equivalents of the claims. These embodiments of the present invention may be referred to herein, individually or collectively, by the term "invention", which is for convenience only and is not intended to automatically limit the application if in fact more than one invention is disclosed The scope is any individual invention or inventive concept.
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The invention provides a vehicular communication method and communication node. The method includes the steps that the coverage area of a source node is divided into a direct communication area and a relay communication area by the source node according to a transmission distance, and the maximum transmission distance corresponding to the direct communication area is smaller than the minimum transmission distance corresponding to the relay communication area; when the fact that a destination node is placed in the direct communication area of the source node is detected by the source node, the direct communication path between the destination node and the source node is used for data transmission; when the fact that the destination node is placed in the relay communication area of the source node is detected by the source node, whether the relay communication paths exist or not between the destination node and the source node is judged, if yes, the relay communication path with the shortest transmission time is used for data transmission, and if not, the direct communication path between the destination node and the source node is used for data transmission. On the basis that the communication reliability can be guaranteed, the vehicular communication method guarantees a quite large transmission rate. Therefore, the delay time can be effectively shortened, and the handling capacity of the system is improved.
Description
technical field [0001] The invention belongs to the field of wireless communication, and in particular relates to a vehicle-mounted communication method and a communication node. Background technique [0002] 802.11 is a wireless local area network standard formulated by IEEE. It is mainly used for wireless access between users and user terminals, and has been widely used in industry and daily life. In order to meet more application requirements and further expand its application scenarios, the 802.11 series standards are constantly growing, and its standardization work is also constantly being carried out. Generally speaking, the Medium Access Control (MAC) mechanism of 802.11 mainly has the following characteristics: [0003] The principle of the carrier sense multi-point access / collision avoidance (referred to as CSMA / CA) mechanism is as follows: figure 1 shown. Before sending data, the node that wants to send data must first detect that the channel is idle. When the ...
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IPC IPC(8): H04W40/02H04W74/08
CPCY02D30/70
Inventor 魏星李晴阳罗志峰
Owner BEIJING NUFRONT MOBILE MULTIMEDIA TECH