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Dynamic Physical Resource Block Control Apparatus And Process For Dynamically Controlling Allocation Of A Physical Resource Block

Patent Number: 11,272,375


A method and apparatus for optimal dynamic spectrum access (DSA) by a Secondary User (SU) in a Primary User (PU) LTE network is proposed. The Cumulative hazard function from Survival Analysis is used to determine the probability of an SU successfully transmitting over a certain number of Physical Resource Blocks (PRBs) after the SU request arrives during an idle period and then the SU request for transmission is granted if the above probability is more than a set threshold.  Using this principle, the proposed method optimally allocates PRBs from the set of idle LTE channels such that the probability of interference to the PU on each channel is below a set threshold while the number of PRBs assigned to the SU is maximized

patent description

In this invention we propose a method and system which can be used by an SU to optimally use idle Physical Resource Blocks (PRBs) in a PU LTE network for its transmission. Our method uses a non-parametric estimation of the cumulative hazard function from survival analysis to compute the probability of successful transmission of an SU in a PRB. Using this information an optimal PRB allocation scheme is proposed. Using this scheme, an SU can maximize the number of PRBs it can use to transmit while keeping the probability of successful transmission above a set threshold on each LTE channel (or equivalently keeping the probability of interference to the PU below a set threshold). Our scheme does not require any changes to the PU LTE system. Thus, it can be implemented in an SU transparent to the PU LTE system. The method is very simple, hence can easily be implemented in a practical DSA system.

Created September 19, 2022, Updated December 14, 2023