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LTE for UMTS: Evolution to LTE-Advanced, 2nd Edition by Antti Toskala, Harri Holma

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Chapter 8

Radio Resource Management

Harri Holma, Troels Kolding, Daniela Laselva, Klaus Pedersen, Claudio Rosa and Ingo Viering

8.1 Introduction

The role of Radio Resource Management (RRM) is to ensure that the radio resources are efficiently used, taking advantage of the available adaptation techniques, and to serve the users according to their configured Quality of Service (QoS) parameters. An overview of primary RRM functionalities is given in section 8.2, and the chapter then moves on to discuss QoS parameters and admission control issues in section 8.3. Next, details related to both downlink and uplink adaptation and scheduling methodologies are discussed in sections 8.4 and 8.5. Interference coordination is discussed in section 8.6, and a discussion of discontinuous reception is included in section 8.7. The Radio Resource Control (RRC) connection management is introduced in section 8.8, and the chapter is summarized in section 8.9.

8.2 Overview of RRM Algorithms

Figure 8.1 shows an overview of the user-plane and control-plane protocol stack at the eNodeB, as well as the corresponding mapping of the primary RRM related algorithms to the different layers. The family of RRM algorithms at the eNodeB exploits various functionalities from Layer 1 to Layer 3 as illustrated in Figure 8.1. The RRM functions at Layer 3, such as QoS management, admission control, and semi-persistent scheduling, are characterized as semi-dynamic mechanisms, since they are mainly executed during setup ...

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