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FI receiving and processing method and device in ad HOC system

A processing method and processing device technology, applied to electrical components, wireless communication, etc., can solve problems such as frequent repetition of channel access process, inability of nodes to obtain specific information correctly, and high service interruption rate, so as to avoid repeated channels The access process and the effect of solving the high interruption rate of node services

Active Publication Date: 2017-02-22
DATANG GOHIGH INTELLIGENT & CONNECTED TECH (CHONGQING) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0051] Embodiments of the present invention provide a method and device for receiving and processing FI in an AD HOC system, which is used to solve the problem that in the prior art, when the network topology changes dynamically, the node cannot correctly obtain the specific information of the network topology change, which is very difficult. It is easy to repeat the channel access process frequently, which leads to the problem of high service interruption rate

Method used

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  • FI receiving and processing method and device in ad HOC system
  • FI receiving and processing method and device in ad HOC system
  • FI receiving and processing method and device in ad HOC system

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Embodiment 1

[0121] Embodiment 1: In the case that the network topology changes due to factors such as vehicle position changes, nodes will not be able to give positive feedback to new nodes entering the cluster. It is assumed that every N slots constitute a frame, and the value of N is 3 in this embodiment. Such as Figure 6 As shown, node A can be regarded as an isolated node. Node B and node C are one-hop neighbor nodes, and they can communicate normally. There is no communication between node A and node B, and between node A and node C. Node A, Node B, and Node C are all driving in the same direction on the same lane, and the time slots occupied by these three nodes are shown in Table 1. Node A occupies slot 0, node B occupies slot 2, and node C occupies slot 1.

[0122] Table 1

[0123] node A B C time slot resource slot 0 slot 2 slot 1

[0124] Three nodes are analyzed starting from slot 0 of frame X. In slot 0 of frame X, node B and node A cannot c...

Embodiment 2

[0127] Embodiment 2: When the network topology changes due to factors such as vehicle position changes, when a new node enters a cluster, it carries the information of the original cluster. Assume that every N slots constitute a frame, and the value of N in this embodiment is 3. Such as Figure 7 As shown, node A and node D are one-hop neighbor nodes, and the two can communicate normally. Node B and node C are one-hop neighbor nodes, and they can communicate normally. However, there is no communication between node A and node B, no communication between node A and node C, no communication between node D and node B, no communication between node D and node C. These four nodes drive in the same direction on the same lane, and the time slots they occupy are shown in Table 2. Node A occupies slot 0, node B occupies slot 2, node C occupies slot 1, and node D also occupies slot 1.

[0128] Table 2

[0129] node A B C D time slot resource slot 0 slot 2 s...

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Abstract

The invention discloses a method and a device for FI receiving and processing in an AD HOC system. The method comprises the following steps: when a sending time slot in each frame period arrives and before FI is sent, a first node copies information recorded in a maintained time slot state vector corresponding to the sending time slot to a maintained temporary time slot state vector corresponding to the sending time slot; and after the FI is sent and before a sending time slot of the next frame arrives, the first node updates the time slot state vector according to the received FI and the maintained temporary time slot state vector. The method and the device are provided to solve the problem in the prior art that a node cannot correctly acquire specific information about network topology change and is very likely to frequently repeat the channel access process to cause high service interruption rate when the network topology dynamically changes.

Description

technical field [0001] The invention relates to the technical field of mobile communication, in particular to a method and device for receiving and processing FI in an AD HOC system. Background technique [0002] The RR-ALOHA (Reliable Reserved ALOHA) algorithm is an access and resource allocation mechanism based on TDMA (Time Division Multiple Access). as the unit. Every N slots constitute a frame (denoted as Frame), and the slots in each frame are numbered from 0 to N-1, and the frames cycle back and forth. Only one node is allowed to transmit in each slot, that is, the TDMA mode is used between nodes. When a node occupies a time slot, it will periodically send FI (Frame Information, frame information) with a fixed information organization structure. FI carries the time slot occupancy status directly perceived by the node, that is, the node's one-hop (One hop, OH ) The usage of the time slots in the previous frame by nodes within the range, and each node will indicate t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W74/00
Inventor 冯媛赵丽房家奕赵毅李凤
Owner DATANG GOHIGH INTELLIGENT & CONNECTED TECH (CHONGQING) CO LTD