ved universal terrestrial radio access network (E-UTRAN). Overall description (release 8). 8. 3GPP. TR 25.848 V4.0.0. Physical layer aspects of UTRA high-speed downlink packet access. © 2009 by Taylor & Francis Group, LLC Chapter 10 Radio Access Network VolP Optimization and Performance on 3GPP HSPA/LTE* Markku Kuusela, Tao Chen, Petteri Lundén, Haiming Wang, Tero Henttonen, Jussi Ojala, and Esa Malkamäki Contents Introduction System Description 10.2.1 HSPA 10.2.2 Properties and Requirements for VoIP 10.3.1 Adaptive Multirate (AMR) 10.3.2 Delay Requirements 10.3.3 Quality Criteria Radio Interface Optimization for VoIP 10.4.1 Robust Header Compression (ROHC) 10.4.2 Multiuser Channel Sharing This chapter previously appeared in VoIP Handbook: Applications, Technologies, Reliability, and Security, published by Taylor & Francis, 2008. © 2009 by Taylor & Francis Group, LLC Long Term Evolution: 3 GPP LTE Radio and Cellular Technology 10.4.3 Utilization of VoIP-Specific Packet Scheduling (PS) Algorithm 10.4.3.1 Design Criteria of the Packet Scheduling Algorithm for VoIP 10.4.3.2 Proposed Fully Dynamic Packet Scheduling Algorithm for VoIP 10.4.3.3 RNC Controlled Nonscheduled Transmission in the Uplink for VoIP over HSUPA 10.4.4 Advanced Receivers Practical Constraints in VoIP Concept Design and Solutions 10.5.1 Control Channel Limitations 10.5.1.1 10.5.1.2 10.5.2 Co-Channel Interference and Noise Limitations for LTE UL Solutions to Avoid System Related Limitations 10.6.1 Solutions in HSPA 10.6.1.1 Uplink Gating Associated with Packet Bundling 10.6.1.2 HS-SCCH-Less Operation 10.6.2 Solutions in LTE 10.6.2.1 Packet Bundling 10.6.2.2 Semi-Persistent Resource Allocation 10.6.2.3 Means to Overcome CQI Imperfections 10.6.2.4 Adaptive HARQ in UL 10.6.2.5 Interference Aware Packet Scheduling for LTE UL 10.6.2.6 TTI Bundling for LTE UL Network Performance of VoIP 10.7.1 10.7.1.1 Simulation Methodology and Assumptions 10.7.1.2 Simulation Results and Analysis 10.7.2 10.7.2.1 Simulation Methodology and Assumptions 10.7.2.2 Simulation