The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
M2M video streaming service has been widely used. In order to evaluate the impact of the uplink traffic caused by M2M video streaming on the mobile network, it is necessary to establish the traffic model of the M2M mobile video services. There are two main types of traffic models in the existing video traffic model. The traffic model based on the self-similarity of video streaming is too complex to...
This paper addresses the cross-tier interference issue in two-tier OFDMA femtocell networks using hybrid spectrum allocation. Firstly, we propose a classification method for users. The macro users are classified into several categories based on their geographic location, and femto users are classified according to the categories of macro users. Then, based on such user classifications, a hybrid spectrum...
This paper addresses how to improve the energy efficiency of OFDMA femtocell networks with sleep mode. Firstly, the energy consumption of the sleep mode is analyzed. Considering the requirements of improving the energy efficiency and ensuring the QoS of users, we extend the definition of effective capacity to formulate the tradeoff relationship between the energy efficiency and the waiting delay of...
This paper addresses how to optimize the radio coverage area of OFDMA femtocell networks in enterprise deployment. Considering some basic requirements of coverage, including coverage holes, coverage overlaps, area spectral efficiency (ASE) and load balancing, the coverage optimization problem is modeled as a Multiple Attribute Decision Making (MADM) problem. Then the MADM-based coverage optimization...
This paper addresses the cross-tier interference mitigation problem in two-tier OFDMA femtocell networks using power control. We model the objective of power control with utility functions for macrocell and femtocell, respectively. And we discuss the existence of optimal solutions to power control problems. Then a power control algorithm with Differential Evolution (DE) is developed to find the optimal...
This paper addresses the cross-tier interference mitigation problem using power allocation in two-tier OFDMA femtocell networks. We formulate the power allocation problem as a dual-utility hierarchical (Stackelberg) game with a leader-follower approach. The leaders (macrocells) foresight the response of followers (femtocells), and maximize their individual utility in a non-cooperative manner. After...
This paper investigates the performance of clustered base station (BS) coordination with limited feedback and channel state information (CSI) delay. Given imperfect CSI caused by the limited feedback and channel delay, the expression of data rate per cell is derived. Moreover, compared to the rate with perfect CSI, a rate loss upper bound is obtained. A optimal feedback bits expression are derived...
This paper addresses the power control problem in two-tier OFDMA femtocell networks to alleviate the cross-tier interference. We model the objective of power control with utility function, and proof the proposed utility function is strictly concave with respect to transmission power. Then a power control algorithm with Particle Swarm Optimization is developed to find the optimal power settings to...
Because of user mobility, highly dynamic, error-prone wireless channels, the QoS control for mobile Peer-to-Peer (MP2P) streaming media has to face considerable challenges. Given to the advantages of policy management, we develop a policy-based QoS control (PBQC) architecture to provide QoS assurance dynamically and automatically in mobile network environment. And we also propose a MP2P streaming...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.