Collaborative information transfer method facing car networking
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A technology of information transmission and Internet of Vehicles, applied in the field of Internet of Vehicles, can solve problems such as OBU absence
Inactive Publication Date: 2013-06-19
GUANGDONG UNIV OF TECH
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Problems solved by technology
In general, messages are sent directly to the OBU through the RSU, but sometimes the OBU is not within the signal coverage of the RSU or there is no available RSU near the OBU. In this case, some OBU cooperation is needed to help the RSU deliver the message to Target OBU
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Embodiment 1
[0043] Such as figure 2 As shown, when the source node in the Internet of Vehicles cannot directly transmit information to the target node, that is figure 2 A source node (RSU1 or OBU1) in the source node area cannot directly transfer information to the target OBU,
[0044] Such as image 3 As shown, a collaborative information transfer method oriented to the Internet of Vehicles collects the information of roadside equipment RSU and mobile equipment OBU, and selects a reliable cooperative relay to carry out message transmission between the source node and the target node; including the following steps:
[0045] S1. Collect information on mobile OBUs that are reachable by all roadside equipment RSUs on the road: Through information interaction between roadside equipment RSU and mobile equipment OBU, mobile equipment OBU sends information related to itself to roadside equipment RSU, roadside equipment RSU records and maintains this information;
[0046] S2. Select the availa...
Embodiment 2
[0059] The signal coverage of the roadside equipment RSU is calculated by the following formula: signal level at the input of the power amplifier (dB) = equipment output power (dB) - cable attenuation (dB) - connector attenuation (dB). Such as image 3 Select n final relays from the candidate OBU, where the selection method of n is as follows:
[0060] According to Shannon's law, R=log 2 (1+r 0 )
[0061] where R is the sending rate, r 0 is the signal-to-noise ratio; s is the received power, N 0 is the receiver noise, so R = log 2 ( 1 + s N 0 ) ,
[0062] From the above formula, the received power can be obtained as s=(2 R -1)N 0 ;
[0063] The signal loss formula for free space is: Space Loss
[0064] L s =20lg(F)+20lg(D)+32.45;
[0065] Among them, F is ...
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Abstract
The invention discloses a collaborative information transfer method facing car networking. Information of a remote subscriber unit (RSU) and information of offshore banking units (OBU) are collected, and a reliable cooperative relay is selected to carry out information transfer between a source node and a goal node. The method comprises that information is collected, namely, through information interaction of the RSU and the OBU, the OBU send information relevant to the OBU to the RSU, the RSU records and keeps the information; a relay set is selected, namely, when the source node sends the information to the goal node, the information, kept by the RSU, relevant to all the OBU is inquired, a set of OBU is initially selected, wherein the set of the OBU can reach a node position of a destination; a sending distance is judged and a final relay is selected, namely, the distance for sending the information is judged according to the type of information which is needed to be transferred, the number n of relays is selected according to the confirmed sending distance, and eventually n OBUs are randomly selected from the selected OBU set to be used as final cooperative relays for transferring information. The method can select relay nodes for a user of the OBU in a reasonable mode, and information transfer can be carried out through the relay nodes.
Description
technical field [0001] The present invention relates to the field of the Internet of Vehicles, and more specifically, to a collaborative information transmission method oriented to the Internet of Vehicles. Background technique [0002] Internet of Vehicles (IOV: Internet of Vehicle) is a segmented application of the Internet of Things in the automotive field. It is the only way for the mobile Internet and the Internet of Things to develop into business essence and depth. The development of convergent technology. [0003] Internet of Vehicles (IOV: Internet of Vehicles) refers to a dynamic mobile communication system that interacts between vehicles, vehicles and roads, vehicles and people, vehicles and sensing devices, and realizes vehicle-to-public network communication. It can realize information sharing through vehicle-to-vehicle, vehicle-to-people, vehicle-to-road interconnection, collect information on vehicles, roads and the environment, and process, calculate, share ...
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Application Information
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