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SDL Implementation of LTE UE Non-Seamless Random Access Procedure Handling

Authors:
Mohamed Yousef
Hussein Elsayed
Abdelhalim Zekry

Keywords: LTE; random access procedure; MAC Sub-layer; non successful random access response; non successful contention resolution; SDL

Abstract:
Random access procedure in Long Term Evolution (LTE) is required in completing the connection establishment procedure. Due to the numerous number of connection requests, collisions may occur, which would cause a failure to be completed in both of the contention-based and the non contention-based random access procedures. This paper focuses on the main problems that may arise during the random access procedure execution in the Medium Access Control (MAC) sub-layer of LTE User Equipment (UE) terminal. It investigates the unsuccessful random access response (RAR) and the unsuccessful contention resolution problems. Specification and Description Language (SDL) is used to implement a design of random access procedure to deal with these problems based on 3GPP release 9 standards. Besides the reduced SDL code, an implementation simulation is performed using the Message Sequence Chart (MSC) simulator trace. The simulation proves the correct functionality and feasibility of the built random access procedure in handling those problems according to the standard.

Pages: 109 to 119

Copyright: Copyright (c) IARIA, 2015

Publication date: November 15, 2015

Published in: conference

ISSN: 2163-9027

ISBN: 978-1-61208-439-8

Location: Barcelona, Spain

Dates: from November 15, 2015 to November 20, 2015