A Method of Spectrum Resource Allocation for Vehicle Networks Based on Semi-Markov Chain

Abstract

The invention discloses a vehicle network spectrum resource allocation method based on a semi-Markov chain, and proposes a spectrum multiplexing strategy based on an incentive mechanism to encourage macro users to share available spectrum resources with vehicle users. Among them, the roadside unit is equipped with cognitive equipment, which can perceive the unused idle frequency band in the surrounding environment, and for the dynamic spectrum access strategy between macro users and vehicle users, a semi-Markov chain model is established, and the numerical value is used to An iterative algorithm solves the optimal policy. The method of the invention can make more full use of idle frequency spectrum resources, and at the same time maximize the long-term return of the system.

Description

technical field [0001] The invention belongs to the field of vehicle network technology, and in particular relates to a method for allocating frequency spectrum resources of a vehicle network based on a semi-Markov chain. Background technique [0002] At present, in the vehicle network, there are still many communication technology problems to be solved urgently. First of all, how to solve the problem of shortage of spectrum resources in the vehicle environment. In order to meet people's needs for vehicle communication, entertainment, etc., it is necessary to allocate certain spectrum resources to the vehicle network to provide related vehicle services for vehicles. Although the US Federal Communications Commission (Federal Communications Commission, FCC) has allocated 75MHz bandwidth in the 5.9GHz frequency band to Dedicated Short Range Communications (DSRC) to support V2I (vehicle-to-infrastructure communication) and V2V ( Vehicle-to-vehicle communication), with the incr...

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Problems solved by technology

Therefore, in this solution, only when the available spectrum resources in the vehicle network environment have been allocated, the MBS will reject the user's service request, but it will also cause the communication service requests of the macro user and the vehicle user to be difficult whenever the spectrum resources are insufficient. Satisfied, so the failure of CS to reject user requests in the early stage will also lead to insufficient spectrum resources, which is not conducive to the stable operation of the system; RS will reserve a part of the bandwidth for macro users to ensure the communication of macro users, and the frequency band Vehicles have no right to access, but the vehicle network is random and highly dynamic. In fact, macro users also change dynamically in real time. Therefore, the RS reservation method cannot dynamically adapt to the network, and its priority macro users cannot satisfy vehicle communication to a certain extent. demand, failing to make full use of idle spectrum resources

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