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A Vehicular Network Access Method Based on Adaptive Time Slot Allocation

A time slot allocation and access method technology, which is applied in data exchange through path configuration, electrical components, transmission systems, etc., can solve the problems of reducing access delay and waste of time slots in TDMA methods, so as to reduce access time Delay, increase the probability of successful transmission, and the effect of performance improvement

Inactive Publication Date: 2018-04-24
SOUTHEAST UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] Technical problem: The present invention provides a vehicle network access method based on adaptive time slot allocation that solves the problem of time slot waste in traditional TDMA methods, fully utilizes time slot resources of the network, and reduces access delay

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  • A Vehicular Network Access Method Based on Adaptive Time Slot Allocation
  • A Vehicular Network Access Method Based on Adaptive Time Slot Allocation
  • A Vehicular Network Access Method Based on Adaptive Time Slot Allocation

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Embodiment Construction

[0044] The specific implementation of the vehicular network access method based on adaptive time slot allocation proposed by the present invention will be described in detail below in conjunction with the embodiments and the accompanying drawings.

[0045] to attach figure 1 As shown as an example, a vehicle ad hoc network is composed of nodes A1, B1, B2, C1, D1, E1, and F1. Wherein, the single-hop node set or the two-hop node set composed of each node is shown in Table 1. It is worth noting that the vehicle nodes do not necessarily exist in only one THS. The B1 and B2 nodes in THS1 are also included in THS2. The C1, D1, and E1 nodes in THS2 also belong to THS3. The C1 node is shared by three two-hop node sets. .

[0046] Table 1. Node Set Examples

[0047] node set label

vehicle member node

OHS1

A1, B1, B2

OHS2

B1, B2, C1

OHS3

C1, D1, E1

OHS4

E1, F1

THS1

A1, B1, B2, C1

THS2

B1, B2, C1, D1, E1

...

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Abstract

The invention discloses a vehicle network access method based on self-adaptive time slot allocation, so as to solve the problem of wasted time slot for vehicle user access. The method is as follows: the time slot allocation process of the vehicle node is adaptively adjusted according to the overall condition of the network. After an access process is completed, the node calculates the network user number indicator variable and the time slot indicator variable according to the received broadcast data packets. When When the number of users in the network is low, the vehicle nodes try to occupy more frame time slots. When the time slot resources in the network are scarce, the vehicle nodes schedule the time slot release process to release some spare time slots for the newly added vehicle nodes to use. This method solves the time slot waste problem of the traditional TDMA access method of the vehicle network through the adaptive time slot allocation process, reduces the access delay of the node broadcast data, and uses the spare time slot of the node rationally to improve the performance of the vehicle self-organizing network. greatly improved.

Description

technical field [0001] The invention relates to a vehicle self-organizing network (vehicle network for short) access method based on adaptive time slot allocation. The method is used for vehicle node access in the vehicle network and belongs to the field of media access in communication technology. Background technique [0002] Reliable and low-latency broadcast services play a vital role in the security application of vehicle networks. Vehicle nodes in the network communicate with neighbor nodes within one hop by periodically broadcasting their own position, speed, direction and other information. Information exchange. Through the interaction of these information, some safety applications in the vehicle network, such as collision avoidance, collision prediction and assisted driving, can be realized. [0003] The IEEE 802.11p standard and the Time Division Multiple Access (TDMA, Time Division Multiple Access) method are two commonly used access methods in the vehicular netw...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L29/08H04L12/28
Inventor 沈连丰茆意伟夏玮玮胡静宋铁成
Owner SOUTHEAST UNIV
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