Title :
An advanced bandwidth adaptation mechanism for LTE systems
Author :
Khabazian, Mehdi ; Kubbar, Osama ; Hassanein, Hossam
Author_Institution :
Qatar Mobility Innovations Center (QMIC), Doha, Qatar
Abstract :
In this paper, we propose a bandwidth adaptation mechanism for 3GPP LTE which partially releases bearers´ resources for admission of a new bearer during congestion periods. Each active bearer may contribute into the downgrading mechanism up to its minimum resource requirement according to a bearer contribution attribute called the “downgrading index”. This index incorporates three attributes of an active bearer into the downgrading process. These attributes are the bearer priority, QoS over-provisioning and communication channel quality. The performance of the proposed mechanism is evaluated using simulation. Numerical results show that the probabilities of bearer blocking and handoff bearer dropping improve significantly when employing our proposed mechanism. Further, the results show the capability of the proposed mechanism in fine-tuning the service provider´s generated revenue.
Keywords :
Long Term Evolution; bandwidth allocation; mobility management (mobile radio); quality of service; telecommunication congestion control; wireless channels; 3GPP LTE system; QoS; bandwidth adaptation mechanism; bearer blocking probability; call admission control; communication channel quality; downgrading index; handoff bearer dropping probability; Bandwidth; Barium; Bit rate; Call admission control; Indexes; Modulation; Quality of service; Bandwidth adaptation; Call admission control; Handoff; LTE;
Conference_Titel :
Communications (ICC), 2013 IEEE International Conference on
Conference_Location :
Budapest
DOI :
10.1109/ICC.2013.6655596