Design And Implementation Of TD-LTE Random Access Processing System

As the understanding of "broadband mobile communication" and responding to "broadband Mobile access" from communications industry, the challenges of the needs of "long-term evolution" process came into being. From HSDPA to HSUPA,3GPP has consistently pursued the stable backward-compatible evolutionary path, and occupy the dominant position in the field of mobile communications. What is more,3GPP has its own considerations both in the evolution of standards and upgrading of its timing and pace of work. However, WiMAX based upon OFDM technology, forced 3GPP to spare no effort to work on UMTS's evolutional version-LTE's standardization.This paper discussed mainly in the design and implementation of 3G LTE random access treatment. Random Access is a network communication before the UE access procedure. Random access can be divided into two types:synchronous random access and asynchronous random access. This article discusses the non-synchronous random access procedure, that is, UE has not obtained accurate uplink synchronized yet, and need to estimate, adjust the UE uplink transmitting clock. The synchronization error will be controled within the CP length, while requesting the UE ID from eNodeB, and send the uplink transmission resource requests to eNodeB.This paper combines with the development of 3G LTE's random access treatment, and describes its structure at the base of the the protocol of random access process. This article discusses random access algorithm for the design process cooperated with the hardware facilities, and the main platform is on format 4. We give the performace fig to verify the correctness of this algorithm. During the implementation of this whole system, the paper gives the check analysis of the process.