Time slot resource occupation processing method and time slot resource occupation processing device

Abstract

The invention relates to the field of communication, and discloses a time slot resource occupation processing method and a time slot resource occupation processing device. The method comprises the following steps: when a reset time slot arrives, information recorded in a maintained time slot state vector corresponding to the reset time slot is copied to a maintained historic time slot state vector corresponding to the reset time slot first, then, the time slot state vector is reset, and the time slot state vector and the historic time slot state vector are updated in real time according to received frame information FI before a next reset time slot arrives; and at any time, time slot application is performed according to time slot state information recorded in the currently-maintained historic time slot state vector when that a new time slot resource needs to be applied is determined. Therefore, real-time performance and accuracy of the sent FI are ensured, introduction of wrong history information and unnecessary negative feedback is avoided, the feasibility and reliability of a selected idle time slot are ensured, time slot resource collision is avoided, the amount of processing before FI sending is reduced, and the processing delay is effectively reduced.

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, the DSRC (Dedicated Short Range Communications) protocol for Internet of Vehicles has been specially developed internationally. . 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 allocation is based on the frame stru...

AI Technical Summary

Problems solved by technology

[0016] Under the MS-ALOHA mechanism, the node needs to save each FI received in a frame, and process it in a self-occupied time slot. The node waits until the sending time slot (that is, the self-occupied time slot) is processed to obtain 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 sending time slot of the node is only time slot 99, that is, the node can only obtain the time slot when it reaches time slot 99. Complete the channel occupancy information of one frame and select the application time slot. Assume 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.

Images