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| Author: | Thapliyal, Ashish |
| Title: | Mobility Robustness in 5G Networks |
| Publication type: | Master's thesis |
| Publication year: | 2016 |
| Pages: | (9) + 49 Language: eng |
| Department/School: | Sähkötekniikan korkeakoulu |
| Main subject: | Radio Communications (S3019) |
| Supervisor: | Tirkkonen, Olav |
| Instructor: | Jokela, Tommi |
| Electronic version URL: | http://urn.fi/URN:NBN:fi:aalto-201611025414 |
| Location: | P1 Ark Aalto 5548 | Archive |
| Keywords: | 5G mobility mobility state estimation dual connectivity handover failure radio link failure |
| Abstract (eng): | 5G is the 5th Generation of Mobile telecommunication system. 5G networks will cater to the needs of very diverse user equipment, from millions of stationary sensors per square kilometer to bullet trains running at over 500 km/h. Presence of users with such varied mobility requirements entails us to build a robust mobility architecture for 5G. Two of the important requirements for 5G networks are a lower latency and a higher reliability than in existing generations of mobile networks. To accomplish the above mentioned use cases and requirements of 5G networks, the mobility solutions and their robustness become a very critical part of 5G. In this thesis we have studied the existing LTE networks, and keeping them as a baseline, tried to find solutions for mobility robustness in 5G networks. The thesis discusses Mobility State Estimation (MSE) enhancements for dual and multiconnectivity. Analysis of mobility problems in using only one instance of mobility state for a multi-link, multi-layer connected UE are quantitatively analysed and a solution, which uses a MSE instance for each link in multi-link connectivity, is proposed. Other mobility robustness topic that the thesis focuses upon is improvements in handover failure recovery mechanism, which can also be used for radio link failure in general. The thesis proposes a solution for re-establishment of RRC connection in 5G by using the RRC Connection Suspend and RRC Connection Resume procedure of Narrow Band Inter of Things (NB-IoT). |
| ED: | 2016-11-13 |
INSSI record number: 54945
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