A method and device for processing time slot resource occupation

Abstract

The invention relates to the communication field, and discloses a time slot resource occupation processing method and device. The method is: when the reset time slot arrives, first copy the information recorded in the time slot state vector corresponding to the reset time slot maintenance to the historical time slot state vector corresponding to the reset time slot maintenance, and then reset the time slot state vector, and before the arrival of the next reset time slot, update the time slot state vector and historical time slot state vector in real time according to the received frame information FI; and at any moment, when it is determined that a new time slot resource needs to be applied for , apply for a time slot according to the time slot state information recorded in the currently maintained historical time slot state vector. In this way, the real-time and accuracy of the FI sent can be guaranteed, and the introduction of wrong historical information and unnecessary negative feedback can be avoided. At the same time, the feasibility and reliability of the selected idle time slot can be guaranteed, and the collision of time slot resources can be avoided. , reducing the amount of processing before the FI is sent, thereby effectively reducing the processing delay.

Description

technical field [0001] The present invention relates to the communication field, in particular to a time slot resource occupation processing method and device. Background technique [0002] With the development of in-vehicle communication systems and the gradual maturity of mobile ad hoc network technology, in order to realize real-time, dynamic and intelligent management of vehicles, DSRC (Dedicated Short Range Communications, Dedicated Short Range Communications) protocol for Internet of Vehicles has been specially developed in the world. . DSRC organically connects vehicles with vehicles, vehicles and roadside information collection equipment through two-way transmission of information, and supports point-to-point and point-to-multipoint communication. [0003] The mobile slotted ALOHA (Mobile Slotted Aloha, MS-ALOHA) mechanism is a DSRC MAC (Medium Access Control; Media Access Control) layer access and resource allocation mechanism based on time-sharing. Resource alloca...

AI Technical Summary

Problems solved by technology

[0016] Under the MS-ALOHA mechanism, the node needs to save each FI received in one frame, and process it uniformly in the self-occupied time slot. The node waits until the used time slot (that is, the self-occupied time slot) is processed to obtain the complete channel occupancy information. Only then can the time slot resources be applied for, but the time slot resources applied for at this time may not be able to guarantee the delay requirements of the service data packets

[0017] For example, a high-level data packet (with a delay requirement of 100ms, or 1 frame) arrives at time slot 1 in frame N, and the current time slot used by the node is only time slot 99, that is, only when the node reaches time slot 99, can it obtain The channel occupancy information of one frame is completed and the application time slot is selected. It is assumed that the node selects time slot 50 as the application time slot for sending high-level service packets, that is, time slot 50 in frame (N+1). However, when frame N When time slot 1 in +1 arrives, the high-level data packets received in time slot 1 in frame N have timed out and lost packets at this time; obviously, this will cause unnecessary packet loss in the system, and in severe cases will affect System Transmission Performance

[0018] On the other hand, under the MS-ALOHA mechanism, nodes need to maintain a two-dimensional time slot state cache table of N*N or (N-1)*N size. operating load

Moreover, under the MS-ALOHA mechanism, the node processes the cached slot state cache table before sending FI, which will also bring a certain load to the processing capacity of the processor.

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