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Slot selection optimizing method and device

A time slot selection and optimization method technology, applied in the field of communication, can solve the problems of low efficiency of time slot selection, unfavorable reduction of the possibility of collision of selected time slots, non-node collisions, etc.

Active Publication Date: 2016-04-13
DATANG MOBILE COMM EQUIP CO LTD
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AI Technical Summary

Problems solved by technology

[0045] 2) The time slot occupied by the non-node itself collides
It can be seen that the basic RR-ALOUHA algorithm is not conducive to reducing the possibility of collision in selected slots, and the efficiency of slot selection is low, which is not conducive to reducing the information overhead of interaction

Method used

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  • Slot selection optimizing method and device
  • Slot selection optimizing method and device

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Embodiment Construction

[0179] In order to reduce the possibility of time slot selection collisions, in the embodiment of the present invention, the format of FI is redesigned, and when each node interacts with FI, only the time slot status information of the occupied time slot and the most likely The time slot state information of the time slot where the collision occurred, wherein whether the time slot is occupied is determined according to the occupied node information recorded in the time slot state information, and whether the time slot is likely to collide is determined according to the information recorded in the time slot state information determined by the measurement information.

[0180] In the embodiment of this application, the Internet of Vehicles is taken as an example for introduction. When FI interaction is performed between nodes, there are two FI formats adopted, which are:

[0181] The first format is: see Figure 4 , Figure 5 and Image 6 As shown, FI transmits the content of...

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Abstract

The invention relates to the field of communication, and discloses a slot selection optimizing method and device which can be used to solve the problem that slot collision occurs during slot selection. The method includes that: a first node selects a sending slot of itself according to FIs sent by other nodes, wherein each FI carries slot state information of M slots which is reported by one corresponding node, and each piece of slot state information includes occupied node information or measurement information of one slot; the first node selects the slot state information of the M slots according to the latest slot state information to generate the FI, and sends the FI when the next sending slot reaches, in this way, the first node can determine the slots which are not occupied and have the maximum collision likelihood according to information interaction between the first node and the other nodes, and can avoid these slots during sending slot selection, so that the collision likelihood of the sending slots can be reduced, resource cost of information interaction can be reduced, and the operation load of a system can be decreased.

Description

technical field [0001] The invention relates to the communication field, in particular to an optimization method and device for time slot selection. Background technique [0002] With the development of vehicular communication systems and the gradual maturity of mobile ad hoc network technology, in order to meet the requirements of real-time, reliability, and distributed characteristics of vehicular ad hoc networks, ALOHA based on reliable reservation can be transplanted to different underlying communication platforms. (ReliableReservedALOHA, RR-ALOHA) vehicle-to-vehicle communication protocol came into being. [0003] The RR-ALOHA protocol is a time-slot structure-based dynamic Time Division Multiple Access (TDMA) channel access protocol, which not only has higher reliability and real-time performance, but also can support broadcasting within a single-hop range in multi-vehicle cooperative communication function, and the protocol can be designed independently of the physic...

Claims

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Application Information

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IPC IPC(8): H04W74/08
Inventor 郭宣羽周海军冯媛房家奕唐纪晔
Owner DATANG MOBILE COMM EQUIP CO LTD
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