QoE optimization approach QoE optimization point QoE optimization strategy Wireless technologies considered Deployment challenges Skorin-Kapov and Matija
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[100 ] SIP application server in IMS domain (i) Mechanisms for service adaptation (ii) Mechanisms for optimal network resource allocation 3GPP access (i) Computational complexity (ii) Users subjectivity (iii) Signaling overhead (iv) Scalability Ivešić et al. [101 ] SIP Application server in IMS domain and policy engine in core network (e.g., PCRF) Mechanisms for domain-wide optimal network resource allocation 3GPP access (i) Computational complexity (ii) Scalability (iii) Users subjectivity Sterle et al. [102 ] SIP application server in IMS domain Mechanisms for service optimization WiMAX and UMTS (i) Computational complexity (ii) Users subjectivity (iii) Scalability (iv) Extendibility Thakolsri et al. [103 ] Core network (cross-layer based optimization) (i) Mechanisms for optimal radio resource allocation (ii) Mechanisms for rate adaptation UMTS (HSDPA) (i) Users subjectivity (ii) Extendibility Staehle et al. [97 ] Core network (cross-layer based optimization) (i) Mechanisms for optimal radio resource allocation (ii) Mechanisms for service optimization WLAN (i) Computational complexity (ii) Users subjectivity (iii) Scalability Shehada et al. [112 ] Core network (cross-layer based optimization) Mechanisms for optimal network resource allocation LTE (i) Extendibility (ii) Users subjectivity Amram et al. [113 ] Core network (cross-layer based optimization) (i) Mechanisms for optimal network resource allocation (ii) Mechanisms for optimal handover decision LTE and WLAN (i) Extendibility (ii) Cost limitations (iii) Optimal CDN node selection (iv) Users subjectivity (v) Scalability (vi) Modification of scheduling algorithm Aristomenopoulos et al. [109 ] Access network (cross-layer based optimization) (i) Mechanisms for optimal radio resource allocation (ii) Mechanisms for integration of user's subjectivity CDMA (i) User’s fairness (ii) Extendibility (iii) Scalability Wamser et al. [110 ] Access network (eNodeB) Mechanisms for service optimization (prioritized traffic scheduling) LTE (i) User’s fairness (ii) Signaling overhead (iii) Modification of scheduling algorithm Piamrat et al. [111 ] Access network (user- and network-data collection) Mechanisms for optimized access network selection WLAN (i) Computational complexity (ii) Importing intelligence into base stations (iii) Possible signaling overhead (iv) Extendibility (v) User’s fairness Khan et al. [114 ] Sender side (preencoding stage over access network) (i) Mechanisms for service optimization (ii) Mechanisms for rate adaptation UMTS (i) Extendibility (ii) Users subjectivity (iii) Modification of SBR El Essaili et al. [107 ] Distributed on the end user terminal and access network (base station) (i) Mechanisms for optimal radio resource allocation (ii) Mechanisms for service optimization LTE (i) Signaling overhead (ii) Computational complexity (iii) User's privacy Csernai and Gulyas [115 ] End user mobile device Mechanisms for optimized battery consumption WLAN (i) Extendibility (ii) Cost requirements (iii) Modification of scheduling algorithm Latr
et al. [104 ] Access network (i) Mechanism for monitoring the network and building knowledge about it (ii) Mechanisms for analyzing the knowledge and determining QoE actions and enforcing them (iii) Mechanisms for reducing packet loss and switching to different video bit rate to obtain better quality Not explicitly stated (i) Scalability (ii) Users subjectivity (iii) Computational complexity Hassan et al. [106 ] Access network (i) Mechanisms for optimized resource allocation and provider revenue WLAN (applicable to others) (i) User’s fairness (ii) Scalability (iii) Speech processing