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Performance of an Adaptive Multiuser OFDM Uplink With Carrier Frequency Offsets
White Papers Using an OFDM based uplink for the future cellular network has been controversial issue due to difficulties in time and frequency synchronization and high Peak-to-Average Power Ratio (PAPR). In this paper, a model is provided to quantify the...
[April 11, 2007, 1:01]
Distributed Uplink Scheduling in CDMA Networks
White Papers The latest release of the CDMA2000 1xEV-DO system incorporates a number of mechanisms that afford mobile devices some flexibility in making uplink transmission decisions. It explores a class of simple probabilistic policies that readily lend...
[February 29, 2008, 0:02]
Classification of the Uplink Scheduling Algorithms in IEEE 802.16
White Papers However, the actual version of the standard does not define a MAC scheduling architecture in uplink as well as downlink direction. The demand for high speed broadband wireless systems is increasing rapidly.
[April 23, 2009, 1:24]
Joint Uplink and Downlink Capacity Considerations in Admission Control in Multiservice CDMA/HSDPA Systems
White Papers In the latter case, packets are typically found in the downlink whereas ACKs are in the uplink. Those two links are asymmetric in the case of CDMA-based High Data Rate (HDR)/High-Speed Downlink Packet Access (HSDPA) systems, the uplink being much...
[December 21, 2007, 0:01]
Qualcomm provides Super 3G's missing uplink
Talkback Uplink speed in UMTS and HSDPA is up to 384kBit/s in todays system - if it is lower than this is either that the used equipment is not capable or the Quality of Service provided by operator is not allowing any higher datarates than e.g.kBit/s.
[July 21, 2006, 7:55]
Qualcomm provides Super 3G's missing uplink
News Qualcomm has successfully completed a test call using HSUPA (High Speed Uplink Packet Access), the missing uplink in super-3G. According to Qualcomm, the test calls achieved an uplink speed of 2Mbps, compared to the 64Kbps uplink speed offered by...
[July 20, 2006, 11:15]
Vodafone boosts uplink speeds
News The enhancement, called High Speed Uplink Packet Access (HSUPA), offers increased upload speeds of 1.44Mbps, which Vodafone claims is 10 times faster than upload speeds offered by standard 3G. The availability of HSUPA is a critical tool in the 3G...
[August 28, 2007, 13:10]
Soft Handoff and Uplink Capacity in a Two-Tier CDMA System
White Papers This paper examines the effect of soft handoff on the uplink user capacity of a CDMA system consisting of a single macrocell in which a single hotspot microcell is embedded. In systems using Code-Division Multiple Access (CDMA), user capacity is...
[March 25, 2008, 8:43]
On TCP Aware Uplink Scheduling in WiMAX Networks
White Papers This paper proposes polling based scheduling algorithms for TCP based applications in multipoint-to-point WiMAX networks. The first proposed scheduling algorithm uses TCP Congestion Window (cwnd) size, whereas the second one uses cwnd size and TCP...
[April 22, 2009, 1:24]
On TCP-Aware Uplink Scheduling in IEEE 802.16 Networks
White Papers This paper propose two polling based scheduling schemes for applications based on TCP in a multipoint-to-point IEEE 802.16 network. The first scheme uses TCP congestion window (cwnd) size, whereas the second one uses cwnd size and TCP timeouts to...
[April 22, 2009, 1:24]
T-Mobile to turn on HSUPA
News T-Mobile will on Tuesday turn on its fast uplink mobile broadband service, claiming it is the first UK operator to do so on a nationwide basis. High-speed downlink packet access (HSDPA), also known as 'super-3G', is already commonly rolled out...
[June 30, 2008, 17:13]
Congestion-Distortion Optimized Peer-to-Peer Video Streaming
White Papers In live peer-to-peer streaming, a video stream is transmitted to a large population of viewers, through the use of the uplink bandwidth of participating peers. In particular, overwhelming the uplink of some peers would create a large increase in...
[October 22, 2008, 1:01]
3Com Network Jack NJ-95 review
Reviews LEDs on the front panel show power and uplink status, and one by each port gives its link status. Even this unmanaged version of the switch supports 802.1p packet prioritisation, so if you're using a VoIP system that supports this standard, its...
[June 3, 2003, 10:41]
Mobile broadband working group replaced
Talkback LTE (Long Term Evolution) 4G is being defined and is agreed on the use of OFDMA for the downlink and SC-OFDM for the uplink. LTE looks very likely to use SC-OFDM (single carrier OFDM) on the uplink because this provides a way to spread energy to...
[September 22, 2006, 18:27]
High Speed Downlink Packet Access (HSDPA): Higher Data Rates for UMTS
White Papers The second step will be to enhance the uplink data rates, improved uplink capacity and reduced uplink delay. High Speed Downlink Packet Access is the first step in the evolution of WCDMA (UMTS) networks.
[March 23, 2005, 2:00]
PDA Stadtplandienst Hannover
Downloads No more struggling to figure out where you are: GPS uplink allows you to fix your actual map position in realtime. With the Mobile City Map Service you know exactly where you are and where you need to go.high display speed detailed information...
[March 10, 2008, 6:00]
PDA Stadtplandienst Berlin
Downloads No more struggling to figure out where you are: GPS uplink allows you to fix your actual map position in realtime. With the Mobile City Map Service you know exactly where you are and where you need to go.high display speed detailed information...
[March 10, 2008, 7:00]
PDA Stadtplandienst Wetter (Ruhr)
Downloads No more struggling to figure out where you are: GPS uplink allows you to fix your actual map position in realtime. With the Mobile City Map Service you know exactly where you are and where you need to go.high display speed detailed information...
[March 18, 2005, 6:00]
Using Layered Video to Provide Incentives in P2P Live Streaming
White Papers The system is heterogeneous with peers having different uplink bandwidths. They have designed a distributed protocol in which a peer contributing more uplink bandwidth receives more layers and consequently better video quality.
[February 1, 2009, 0:00]
P2P Video Live Streaming With MDC: Providing Incentives for Redistribution
White Papers They consider a heterogeneous system with peers having different uplink bandwidths. They design a distributed protocol in which a peer contributing more uplink bandwidth receives more descriptions and consequently better video quality.
[February 1, 2009, 0:00]
