ABSTRACT
The emerging mobile broadband (MBB) wireless and mobile network architectures tend to become more heterogeneous with macro base station (MaBS), micro base station (MiBS), pico base station (PBS), and femtocell base station (FBS) sites, complemented by particular wireless local area networks (WLAN or Wi-Fi), access points (APs), and enabled with various radio access technologies (RATs). The term broadband wireless heterogeneous network (HetNet) denotes a radio access network (RAN) supporting a mix of RATs granting access to the same mobile device (MD). Also, the HetNet refers to a RAN based on “hierarchically different cell structures” when a particular RAT is served by various types of base station (BS)/AP sites. With this regard, it becomes evident that the mobile paradigm intensively moves from the mobile network operator (MNO)–driven approach implemented beyond 3G RATs, such as the universal mobile telecommunications system (UMTS)/high-speed packet access (HSPA) (third generation partnership project [3GPP]
CONTENTS
15.1 Introduction ........................................................................................................................ 279 15.2 Literature Review............................................................................................................... 281 15.3 Research Methodology ..................................................................................................... 281
15.3.1 Description of the Research Method .................................................................. 281 15.3.2 Reliability of the Research Method ..................................................................... 282
15.4 HetNet Dimensioning ....................................................................................................... 282 15.5 Coverage and Capacity Assessment ...............................................................................285 15.6 Modeling of the Cost Structure and Protability ......................................................... 287 15.7 Results for the Cost-Capacity and Protability Analysis ............................................ 290
15.7.1 HetNet with Sole RAT Deployment .................................................................... 290 15.7.2 HetNet Deployed with Mix of RATs ................................................................... 292
15.8 Use of Cognitive Radio for Guaranteeing QoS for Capacity Overprovisioning ...... 293 15.9 Conclusion and Future Work ........................................................................................... 296 Acknowledgments ...................................................................................................................... 296 References ..................................................................................................................................... 297
release 6/7), mobile WiMax 1.5 (Institute of Electrical and Electronics Engineers [IEEE] 802.16-2009), and cellular systems for the fourth generation (4G) long-term evolution (LTE) RAT (3GPP release 8/9) out of the International Telecommunication Union (ITU) IMT-2000 specications [1], toward the user-driven or service-centric approach supported beyond 4G RATs which are (according to the ITU IMT-advanced umbrella [2]) LTE-advanced or “LTE-A” (3GPP LTE Release 10 and beyond) [3] and wireless MAN-advanced or “Mobile WiMax System Release 2.0” (WiMax 2.0) (IEEE Std 802.16-2012) [4].
