Qualcomm Incorporated is an American global semiconductor company that designs and markets wireless telecommunications products and services. The company headquarters are located in San Diego, California, USA. The company has 157 worldwide locations. The parent company is Qualcomm Incorporated , which includes the Qualcomm Technology Licensing Division . Qualcomm's wholly owned subsidiary, Qualcomm Technologies, Inc. , operates substantially all of Qualcomm's R&D activities, as well as its product and services businesses, including its semiconductor business, Qualcomm CDMA Technologies. In November 2014, Qualcomm CEO Steve Mollenkopf announced at the company’s annual analyst day meeting held in New York City that the company is planning to target the data center market with new server chips based on ARM technology and plans to make them commercially available by the end of 2015. Wikipedia.
Rangan S.,New York University |
IEEE Journal on Selected Areas in Communications | Year: 2012
Interference coordination is a fundamental challenge in emerging femtocellular deployments. This paper considers a broad class of interference coordination and resource allocation problems for wireless links based on utility maximization with a general linear mixing interference model suitable for complex femtocellular systems. The resulting optimization problems are typically hard to solve optimally even using centralized algorithms but are an essential computational step in implementing rate-fair and queue stabilizing scheduling policies in wireless networks. We consider a belief propagation framework to solve such problems approximately. In particular, we construct approximations to the belief propagation iterations to obtain computationally simple and distributed algorithms with low communication overhead. Notably, our methods are very general and apply to, semi-static and dynamic interference coordination problems including the optimization of transmit powers, transmit beamforming vectors, fractional frequency reuse (FFR) and sub-band allocations to maximize the above objective. Numerical results for femtocell deployments demonstrate that such algorithms compute a very good operating point in typically just a couple of iterations. © 2006 IEEE.
Wang B.,Qualcomm |
Liu K.J.R.,University of Maryland University College
IEEE Journal on Selected Topics in Signal Processing | Year: 2011
With the rapid deployment of new wireless devices and applications, the last decade has witnessed a growing demand for wireless radio spectrum. However, the fixed spectrum assignment policy becomes a bottleneck for more efficient spectrum utilization, under which a great portion of the licensed spectrum is severely under-utilized. The inefficient usage of the limited spectrum resources urges the spectrum regulatory bodies to review their policy and start to seek for innovative communication technology that can exploit the wireless spectrum in a more intelligent and flexible way. The concept of cognitive radio is proposed to address the issue of spectrum efficiency and has been receiving an increasing attention in recent years, since it equips wireless users the capability to optimally adapt their operating parameters according to the interactions with the surrounding radio environment. There have been many significant developments in the past few years on cognitive radios. This paper surveys recent advances in research related to cognitive radios. The fundamentals of cognitive radio technology, architecture of a cognitive radio network and its applications are first introduced. The existing works in spectrum sensing are reviewed, and important issues in dynamic spectrum allocation and sharing are investigated in detail. © 2011 IEEE.
MMSys'11 - Proceedings of the 2011 ACM Multimedia Systems Conference | Year: 2011
In this paper, we provide some insight and background into the Dynamic Adaptive Streaming over HTTP (DASH) specifications as available from 3GPP and in draft version also from MPEG. Specifically, the 3GPP version provides a normative description of a Media Presentation, the formats of a Segment, and the delivery protocol. In addition, it adds an informative description on how a DASH Client may use the provided information to establish a streaming service for the user. The solution supports different service types (e.g., On-Demand, Live, Time-Shift Viewing), different features (e.g., adaptive bitrate switching, multiple language support, ad insertion, trick modes, DRM) and different deployment options. Design principles and examples are provided. Copyright 2010 ACM.
Qualcomm | Date: 2016-01-11
A method includes, at a resistive memory device, determining an average effective reference resistance level based on a first effective reference resistance and a second effective reference resistance. The first effective reference resistance is based on a first set of reference cells of the resistive memory device and the second effective reference resistance is based on a second set of reference cells of the resistive memory device. The method includes trimming a reference resistance at least partially based on the average effective reference resistance level. Trimming the reference resistance includes, in response to determining that the first effective reference resistance is not substantially equal to the average effective reference resistance level, modifying one or more states of one or more magnetic tunnel junction devices associated with the first effective reference resistance.
Qualcomm | Date: 2016-01-12
Systems and methods that allow for Dynamic Clock and Voltage Scaling (DCVS) aware interprocessor communications among processors such as those used in or with a portable computing device (PCD) are presented. During operation of the PCD at least one data packet is received at a first processing component. Additionally, the first processing component also receives workload information about a second processing component operating under dynamic clock and voltage scaling (DCVS). A determination is made, based at least in part on the received workload information, whether to send the at least one data packet from the first processing component to the second processing component or to a buffer, providing a cost effective ability to reduce power consumption and improved battery life in PCDs with multi-cores or multi-CPUs implementing DCVS algorithms or logic.