Spectrum resource allocation method for vehicle network based on semi-Markov chain

Abstract

The invention discloses a spectrum resource allocation method for a vehicle network 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. A roadside unit is equipped with cognitive equipment which can sense unused idle frequency bands in a surrounding environment. A semi-Markov chain model is established for a dynamic spectrum access strategy between the macro users and the vehicle users, and meanwhile a numerical iteration algorithm is used for solving an optimal strategy. Through adoption of the method disclosed by the invention, idle spectrum resources can be utilized more fully, and meanwhile the long-term return of a system is maximized.

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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