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.
With the success of 4th generation of mobile communication, known as LTE, there is an increasing demand for additional spectrum to be made available to mobile network operator worldwide. However, spectrum is a finite resource and local regulators have only a limited – if at all – amount of frequencies available that could be auctioned off to service providers. Therefore, the industry is exploring...
Service delivery over 3GPP Long Term Evolution Advanced (LTE-A) is predominantly based on user specific unicast transmissions. The evolved Multimedia Broadcast Multicast Service (eMBMS) enables an additional option for content distribution by offering one single data stream to multiple (multicast) or all (broadcast) users within one or multiple mobile network cells. This one-to-many content distribution...
Manifold processing approaches have contributed to LTE such a new version named LTE-A (Long Term Evolution-Advanced) have been defined. Among these approaches, we can e.g. cite those named CoMP, MIMO…Nevertheless, thanks to interference's presence, a QoS degradation could sometimes be observed. For that, we will show in this paper, what and how this deficit has affected the studied network. Towards...
Long term evolution advanced (LTE-A) has emerged as a promising mobile broadband access technology aiming to cope with the traffic demand increasing in wireless networks. QoS offered by LTE-A must be maintained during the communication especially for real-time services. Moreover, with the integration of carrier aggregation technology, the handover procedure became more delicate. In fact, the current...
The User Equipments (UE) nowadays are able to provide various internet applications and services that raise the demand for high speed data transfer and Quality of Service (QoS). Accordingly, next generation mobile communication systems driven by these demands are expected to provide higher data rates and better link quality compared to the existing systems. Orthogonal Frequency Division Multiple Access...
Long Term Evolution Advanced (LTE-Advanced) is the next step in LTE evolution and allows operators to improve network performance and service capabilities through smooth deployment of new techniques and technologies. LTE-Advanced uses some new features on top of the existing LTE standards and protocols to provide better user experience and higher throughputs. Some of the most significant features...
Long Term Evolution Advanced (LTE-Advanced) networks have problems of low data rate for cell-edge users, as well as coverage gaps. Contemporary communication standards use different techniques to deal with these problems; one candidate technique is called Coordinated Multi-Point (CoMP). In this context, we introduce Shared Segmented Upload (SSU), a novel method for uploading large files from a UE...
This paper presents a new type of heterogeneous network (HetNet) with the intention of achieving both good user throughput performance and lower system power consumption, which cooperatively controls both cell selection offset (CSO) on the cell range expansion (CRE) and the transmission power for pico-eNB (PeNB TP). Average user throughput and the cell edge user throughput are provided as parameters...
We consider a cellular network where intelligent cellular devices owned by selfish users are incentivized to cooperate with each other by using tokens, which they exchange electronically to “buy” and “sell” downlink relay services, thereby increasing the network's capacity. We endow each device with the ability to learn its optimal cooperation strategy online in order to maximize its long-term utility...
This article addresses intermodulation challenges in carrier aggregation (CA) and multicluster type transmission scenarios in mobile transmitters. In such transmission schemes, emerging in 3GPP LTE-Advanced mobile cellular radio evolution, the spectrum of the signal entering the transmit power amplifier (PA) is of non-contiguous nature and thus severe intermodulation is created which may violate the...
Evolved Multimedia Broadcast Multicast Service (eMBMS) is a point-to-multipoint content delivery solution designed for LTE/LTE-A. It distributes efficiently the broadcast and multicast service to a massive number of mobile devices located in a given geographical area. eMBMS can be used to boost the network's capability for providing high-quality multimedia service in high user-density area such a...
This paper describes a state-of-the-art cell range expansion (CRE) technique in HetNet to increase the system capacity and/or improve the user throughput. Adaptive control CRE is proposed with the use of an optimal combination of two different cell selection offsets (CSOs) for each user equipment (UE), although the conventional CRE provides a fixed CSO for all UEs. The control algorithm of the proposed...
Along with the further enhancement from Long Term Evolution (LTE), LTE-Advanced (LTE-A) will provide more diversified mobile applications services. One of them is so-called “Small Data Applications (SDAs).” Due to the unique characteristic of SDA that each of SDAs will transmit merely a small data amount, the network should accommodate a large number of Random Access (RA) attempts every time each...
The aim of Long Term Evolution-Advanced (LTE-A) is to support a maximum throughput exceed 1 Gbps to the increase in data usage due to smart phones and bandwidth up to 100 MHz to an exponential growth in video downloads. LTE-A downlink physical layer allows a mobile to transmit and receive on up to four component carriers (CCs) in non-contiguous CCs case, each of which has a maximum bandwidth of 20...
Predictions abound on the growth of mobile data traffic driven by smart phones and tablet PCs that come with an expectation of broadband Internet connectivity everywhere and a demand for high quality video. The FCC's National Broadband Plan indicated that mobile data traffic in North America would increase by roughly 20 to 45 times between 2009 and 2014, and current data suggests these numbers may...
System performance of mobile wireless communications is limited by fast channel variations, which are mostly due to the mobility of user terminals and scatterers. In order to obtain the optimal system performance, precise knowledge of the channel variations is often needed through channel prediction. A new cluster-based time-domain predictor with improved performance is proposed in this paper. Our...
This paper presents key techniques in Long-Term Evolution (LTE) and LTE-Advanced as well as its potential applications. LTE supports peak rates up to 300 Mbps in downlink (DL) and 75 Mbps in uplink (UL), whereas LTE-Advanced would support 1.2 Gbps in DL and 600 Mbps in UL [1]. Since both peak and average throughput are dramatically improved compared to High-Speed Packet Access (HSPA) [2], LTE and...
As a promising radio access technology for next generation mobile communication systems, LTE (Long-Term Evolution) is being standardized by the 3rd Generation Partnership Project (3GPP) international standardization organization. LTE Release 8 has many advantages to the other systems, e.g., the peak throughput is 300Mbps in Downlink (DL) and 75Mbps in Uplink (UL), 2-3 time higher spectrum efficiency...
Closed-loop transmission combined with MIMO (multiple-input multiple-output) and OFDM (orthogonal frequency division multiplexing) technologies have drawn most attentions during development of the 4G systems (fourth generation of mobile communication systems). In LTE (Long Term Evolution) and LTE-Advanced systems, which are proposed by 3GPP (Third Generation Partnership Project) to be the most competitive...
Inter-cell interference coordination (ICIC) is one of the key technologies in the multi-cell radio resource management of mobile systems. It plays a vital role in mitigating strong inter cell interference and guaranteeing proper quality of services for in-progress sessions. Because heterogeneous deployment is adopted in LTE-Advanced, and interference problem becomes serious. In this paper, we propose...
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.