Resource allocation with carrier aggregation in LTE Advanced cellular system sharing spectrum with S-band radar

Abstract

Spectrum sharing is a promising solution for the problem of spectrum congestion. We consider a spectrum sharing scenario between a multiple-input multiple-output (MIMO) radar and Long Term Evolution (LTE) Advanced cellular system. In this paper, we consider resource allocation optimization problem with carrier aggregation. The LTE Advanced system has N BS base stations (BS) which it operates in the radar band on a sharing basis. Our objective is to allocate resources from the LTE Advanced carrier and the MIMO radar carrier to each user equipment (UE) in an LTE Advanced cell based on the running application of UE. Each user application is assigned a utility function based on the type of application. We propose a carrier aggregation resource allocation algorithm to allocate the LTE Advanced and the radar carriers' resources optimally among users based on the type of user application. The algorithm gives priority to users running inelastic traffic when allocating resources. Finally we present simulation results on the performance of the proposed carrier aggregation resource allocation algorithm.

MIMO radar waveform design for coexistence with cellular systems

“…It represents the beampattern of a moving maritime MIMO radar. Since interference channels are evolving fast, beampattern is obtained by solving the optimization problem in equation (15) and then projecting the resulting waveform onto the null space ofH using the projection matrix in equation (10). The resulting waveform covariance matrix is given by…”

“…The other cellular systems, in the network, can be protected from radar interference by using resource allocation techniques at the cellular systems [15].…”

“…In this case, it is not feasible to include the NSP in the optimization problem. Alternately, we can design CE waveforms by solving the optimization problem in equation (15) and then projection the waveform onto the null space Block diagram of the transmit beampattern design problem for a stationary maritime MIMO radar. The desired waveform is generated by including the projection matrix PV, for the candidate interference channel H Best , in the optimization process.…”

Spectrum sharing methods for the coexistence of multiple RF systems: A survey

“…The rate allocation problem is formulated as two convex optimization problems, where the radar-interfering sector assignments are extracted from the portion of the spectrum non-overlapping with the radar operating frequency. Another resource allocation algorithm with carrier aggregation is proposed in [175] to facilitate coexistence of LTE Advanced cellular systems and S-band radar systems. In particular, the proposed algorithm gives priority to users with inelastic traffic.…”

Overview of security approaches in 4G LTE network

“…For future enhancements of LTE, which called LTE-Advanced (LTEA), it will improve the performance to mobile operators and first responders by providing additional coverage flexibility and more capacity especially at the cell edge, two key performance indicators of a radio security network [5].…”