Aggregating LTE and Wi-Fi: Fairness and split-scheduling
| Autor: | Donggyu Yun, Wooseong Kim, Boram Jin, Segi Kim, Hojin Lee, Yung Yi |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Computer science
Mode selection business.industry Quality of service Mobile broadband ComputerSystemsOrganization_COMPUTER-COMMUNICATIONNETWORKS 020206 networking & telecommunications 020302 automobile design & engineering 02 engineering and technology Scheduling (computing) Backhaul (telecommunications) 0203 mechanical engineering Resource scarcity Hardware_GENERAL 0202 electrical engineering electronic engineering information engineering Cellular network Wireless business Computer network |
| Zdroj: | WiOpt |
| Popis: | People are seeking solutions in diverse directions to cope with mobile data explosion and resource scarcity in mobile cellular networks. Of many candidate approaches, smart aggregation of LTE and Wi-Fi radios is a promising solution that bonds heterogeneous links to meet a mobile terminal's available bandwidth need. Motivated by the existence of a significant number of carrier-operated Wi-Fi APs, we propose a mechanism, called LTE-W, of efficiently utilizing LTE and Wi-Fi links only with the minimum changes of eNodeBs, LTE backhaul networks, and mobile terminals. Our mechanism has the following two key components: (i) mode selection and (ii) bearer-split scheduling. In the mode selection, LTE-W internally decides who should be served by either of LTE or LTE-Wi-Fi aggregation considering intra-cell fairness rather than just following users' intention of aggregation. For the users decided to be offered the aggregation service, we choose a bearer (roughly defined a set of flows with a similar QoS in LTE) as a basic unit of aggregation and propose a smart intra-bearer scheduling algorithm that splits a bearer's traffic into LTE and Wi-Fi links, considering the tuning of TCP flows that take two heterogeneous wireless links. We evaluate our mechanism using the NS-3 with LENA, and compare it to a transport-level aggregation mechanism, MPTCP, demonstrating that LTE-W significantly improves MPTCP, e.g., up to 75% in terms of Jain's fairness index. |
| Databáze: | OpenAIRE |
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