Time slot selection method and device
A time slot selection and time slot technology, which is applied in the field of communication, can solve the problems of non-node collision, low efficiency of time slot selection, and unfavorable reduction of interactive information overhead, etc.
Active Publication Date: 2016-03-23
DATANG MOBILE COMM EQUIP CO LTD
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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
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[0188] In order to reduce the possibility of time slot selection collision and improve the efficiency of time slot selection, in the embodiment of the present invention, the format of FI is redesigned, wherein whether the time slot is occupied is based on the occupation status recorded in the time slot status information Information is determined, and whether a time slot is likely to collide is determined according to the measurement information recorded in the time slot state information.
[0189] In the embodiment of this application, the Internet of Vehicles system is taken as an example, and the specific technical solutions provided are as follows:
[0190] There are two FI formats used when nodes interact with each other, they are:
[0191] The first format is: see Figure 4 As shown, in the FI sent by each node, each slot consists of N bits. Among them, the X1 bit is used to record the channel indication, that is, to determine whether the decoding is correct, the chann...
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The invention relates to the field of communication, and especially relates to a time slot selection method and device which are used to improve time slot selection sending accuracy and selection efficiency. The method comprises the following steps: a first node monitors FI sent by other nodes and selects a sending time slot of the first node, the first node continues to monitor the FI sent by the other nodes, time slot state information of various time slots recorded in local is updated in real time, and FI is generated according to newly updated time slot state information of each time slot and is sent when a next sending time slot is arrived at. So the first node can determine an occupied time slot according to the time slot state information interactive with the other nodes, an unoccupied time slot having the maximum collision probability is determined according to information obtained through bottom-layer measurement, the probability of collisions which occur when the time slots are sent is reduced, and the time slot selection sending accuracy and the selection efficiency are improved; and reduction of a resource overhead of an information interaction is facilitated, and an operation load of a system is reduced.
Description
technical field [0001] The invention relates to the communication field, in particular to a method and device for selecting a time slot. 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 physical layer, so...
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Login to View More IPC IPC(8): H04W72/04
CPCH04W72/04
Inventor 郭宣羽周海军冯媛房家奕唐纪晔
Owner DATANG MOBILE COMM EQUIP CO LTD