Ray Tracing Analysis and Field Trials of 3D Beamforming in Real Deployments
- Albrecht T.
- Halbauer H.
- Herzog G.
- Hoek C.
- Koppenborg J.
In this paper, the properties and capabilities of 3D beamforming in a real propagation scenario have been analyzed by ray tracing simulation and been compared with field measurements for this environment. Therefore, a real propagation scenario comprising line-of-sight (LOS) and non-LOS (NLOS) areas has been modeled and applied to a ...
Smart Mobile Cloud to virtualize Radio Access Network functions Input for catalog of Bell Labs Open Day 2013 Stuttgart
- Haberland B.
- Rehm W.
Scalable Congestion Control Protocol for Bursty Flows in Data Center Networks
- Hwang J.
- Yoo J.
Nowadays, data centers are the key computing resource for providing many online services such as web search and cloud computing. These applications, however, frequently suffer from network congestion even under low average link utilization because of momentary bursts in their traffic patterns. Some existing solutions utilize the Explicit Congestion Notification ...
Combined SDM and WDM transmission over 3 x 3 Coupled-Core Multicore Fiber
- Chang S.
- Chen H.
- Essiambre R.
- Fontaine N.
- Gnauck A.
- Montoliu Cortes M.
- Randel S.
- Ryf R.
- Sasaki T.
- Sethumadhavan C.
- Taru T.
- Winzer P.
We experimentally demonstrate transmission over a novel multicore fiber with 9 cores arranged in 3 groups of 3 cores, such as strong coupling occurs within the groups and weak couplings between groups. We transmitted over 2000 km in a single group and 200 km when all cores are used. low-loss ...
Impact of transponders wake-up time on sleep-mode enabled translucent optical networks
- Morea A.
A very promising energy-efficient strategy in core networks is to put unused transponders into a low-power idle state. However, the no-negligible wake-up time of the transponders may dramatically impact the network performance. We show through simulations that significant degradations on performance take place for long wake-up times for various traffic ...
New Spatial Mode Multiplexer Based on Multiple Phase Plates Provides Spatial Mode Control and No Superposition Losses
- Bigo S.
- Campbell G.
- Charlet G.
- Genevaux P.
- Labroille G.
- Lam P.
- Morizur J.
- Salsi M.
- Simonneau C.
- Treps N.
We designed and built a new type of spatial mode multiplexer with no intrinsic loss and low crosstalk. In this first demonstration we show a multiplexer/demultiplexer with 3 modes: LP01, LP21a and LP21b with coupling loss below 9.9dB.
Information-Centric Networks for Distributed Computing
- Pianese F.
Information-centric Networking (ICN), a paradigm that operates on self-contained named data, naturally extends the role and capabilities of in-network elements. The flexible naming of ICN can be used to convey instructions for content routers to perform a target computation. In this paper, we consider ICN's potential of integrating distributed computing ...
Identifying abnormal patterns in cellular communication flows
- Engel T.
- Goergen D.
- Mendiratta V.
- State R.
Analyzing communication ows on the network can help to improve the overall quality it provides to its users and allow the operators to detect abnormal patterns and react accordingly. In this paper we consider the analysis of large volumes of cellular communications records. We propose a method that detects abnormal ...
Green Indoor Coverage In A Passive Way
- Ni W.
- Shen G.
- Wang W.
With the explosive growth in the number of wireless users and the data traffic needs, how to improve coverage and provide ubiquitous broadband access causes a great challenge for operators. This paper presents a green wireless channel concept for the indoor coverage enhancement. The whole system is composed of the ...
Congestion Due to Random Walk Routing
- Marbukh V.
- Narayan O.
- Saniee I.
In this paper we derive an analytical expression for the mean load at each node of an arbitrary undirected graph for the uniform multicommodity flow problem under random walk routing. We show the mean load is linearly dependent on the nodal degree with a common multiplier equal to the sum ...
Universal waveform and frame design for 5G
- Chen Y.
- Schaich F.
- Wild T.
This article discusses the new requirements, scenarios and possibilities, a 5G wireless communication system is facing. Multiple access for 5G will make use of strict synchronicity where it is available and will drop it where signalling overhead and energy consumption will demand for. A unified frame structure for handling very ...
Multiple-Input-Multiple-Output transmission over few-mode fibers
- Fontaine N.
- Randel S.
- Ryf R.
We present experimental demonstration of spatially multiplexed long-distance transmission over few-mode fibers and coupled-core multicore fibers. The results are based on novel photonic-lantern based mode-multiplexers and the fiber properties relevant for optical transmission are discussed in detail.
Coding and Modulation in Optical Core Networks
- Leven A.
- Schmalen L.
2. Modulation Formats: From 10G OOK to coherently detected QAM 3. Evolution of Forward Error Correction 4. Conclusion
Enhancements of 3GPP LTE-Advanced: An Overview of LTE Releases 11 and 12
- Lopez-Perez D.
- Ming Ding
- Thanos Vasilakos
- Wen Chen
In this paper, we perform a survey on new 3GPP LTE-Advanced enhancements, covering the technologies recently adopted by 3GPP in the Release 11 and those being discussed in the Release 12. In more details, we introduce the latest enhancements on carrier aggregation (CA), multiple-input multiple-output (MIMO) and coordinated multi-point (CoMP) ...
Technical Report for Impact of Random and Burst Packet Losses on H.264 Scalable Video Coding
- Tang S.
This technical report is an extension of our theoretical analysis entitled Impact of Random and Burst Packet Losses on H.264 Scalable Video Coding. The report includes figures and results that are not presented (but refer to) in the paper due to page limit of the journal, to which we are ...
Some thoughts on interactive real-time multimedia delivery
- Tang S.
I was invited to participate in the panel discussion entitled Techniques and Devices for Enhancing (Tele)Communication Capabilities after attending the conference of NexComm 2013 (http://www.iaria.org/conferences2013/NexComm13.htm). The goal of this panel session is to discuss various issues related with IP traffic delivery and techniques to enhance the communication capabilities as well ...
Home Computing Unplugged: Why, Where and When People Use Different Devices at Home
- A. J. Brush
- Kawsar F.
We investigate how technology usage in homes has changed with the increasing prevalence of mobile devices including Tablets and Smart Phones. We logged Internet usage from 86 Belgium households to determine their six most common Internet Activities. Next, we surveyed households about what devices they own, how they share those ...
Reinforcement Learning based HTTP Adaptive Streaming Client
- Van Leekwijck W.
- Wu T.
At present, HTTP Adaptive Streaming (HAS) is developing into a key technology for video delivery over the Internet. In this delivery strategy, the client proactively requests a quality version of chunked video segments based on its perceived network bandwidth and other relevant factors. However, it is often observed that current ...
Social-Aware Stream codec
- Gaste Y.
- Verdot V.
The marriage of Social and Multimedia is consummated and now a concrete reality. The association of tweets and TV broadcasts is now very common, as are the sharing of video clips, or video-based viral communication. However, if "live" (read "simultaneous") consumption of media and social streams is quite straightforward as ...
Duty-cycle dependent THz power generation of opto-electronic methods for wireless communication systems
- Achouche M.
- Caillaud C.
- Moeller L.
- Shen A.
We measure the duty cycle impact on optical THz generation using pulsed signals at 1.5 micron wavelength. Our results suggest pulse coding for wireless transmitters can maximize emitted THz power.