Resource allocation method for cooperation relay orthogonal frequency division multiple access system

Abstract

The invention discloses a resource allocation method for a cooperation relay orthogonal frequency division multiple access system. The method comprises the following steps of adding constraints of different lowest velocity demands of various users when establishing an optimal resource allocation module, introducing a user velocity weighting factor in sub-carrier allocation and relay selection processes, and performing sub-carrier allocation and relay selection according to the principle that the user has the priority in sub-carrier and relay selection if the velocity weighting factor of the user is large, thus, the lowest velocity demand of various users can be ensured well. As a simple equal power allocation method is adopted in the process of simplifying the optimal resource allocation module, the calculation complexity is effectively reduced; the rest of sub-carriers are allocated to various users according to the largest transient velocity, thus, the total velocity of the system can be maximized; and the sub-carriers can be adaptively allocated to various users according to the largest user velocity weighting factor and transient velocity, thus, the change of the wireless communication environment can be adapted well.

Description

technical field [0001] The present invention relates to a resource allocation method for a wireless communication system, in particular to a resource allocation method for a cooperative relay Orthogonal Frequency Division Multiplex Access (OFDMA) system. The resource allocation method is based on a service Quality (Quality of Service, QoS) guarantee. Background technique [0002] Multiple-Input Multiple-Out-put (MIMO) technology is a major technological breakthrough in the field of wireless communication. It forms a MIMO channel structure by installing multiple antennas at the receiving end and the transmitting end at the same time. Due to its full use Airspace resources are reduced, thus doubling the capacity and reliability of the wireless communication system. However, in practical applications, due to the limitations of mobile terminal size, power supply and hardware system complexity, the multiple antennas of MIMO technology are generally installed in the base station,...

AI Technical Summary

Problems solved by technology

The traditional solution is to allocate fixed subcarriers and relays for each user, and then perform power, bit allocation and adaptive modulation according to the allocation scheme of subcarriers and relays. Since this solution allocates fixed subcarriers and relays, Therefore, it cannot adapt well to changes in the wireless communication environment, such as obstacles and ambient temperature; in addition, in the wireless communication system, it is also necessary to have the ability to guarantee the user's minimum quality of service (QoS) requirements, and in some occasions, wireless communication The system may also place higher requirements on user fairness

Images