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News The upgraded network will also use HSUPA (high speed uplink packet access) to increase upload speeds to a theoretical maximum of 1.8Mbps compared to 300Kbps previously. Vodafone is extending its fast mobile broadband coverage to a further three...
[12 May 2008]
whitepaper Uplink scheduling in wireless systems is gaining importance due to arising uplink intensive data services (ftp, image uploads etc.which could be hampered by the currently in-built asymmetry in favor of the downlink.
[10 Apr 2008]
whitepaper In IEEE P802.16-REVd/D1-2003 OFDMA-PHY, CDMA-based periodic ranging and bandwidth-request transmissions are transmitted in the same uplink allocations for UIUC = 11. Bandwidth-request transmissions are for requesting uplink allocations from the BS...
[10 Apr 2008]
whitepaper This paper studies the uplink performance of an orthogonal frequency division multiplexing (OFDM) wireless system where multiple antennas are utilized at the base station (BS). Further, capacity can be greatly enhanced through spatial division...
[10 Apr 2008]
whitepaper This paper shows that under some conditions, the user capacity of an uplink power-controlled CDMA cell for several important linear receivers can be very simply characterized via a notion of effective bandwidth.
[10 Apr 2008]
News The number of HSUPA (high speed uplink packet access) devices has doubled in six months. The GSA said there are now 66 HSUPA devices, with the majority delivering up to 2.1Mbps on the uplink. The list from A to Z
[07 Apr 2008]
whitepaper 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...
[24 Mar 2008]
whitepaper 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...
[28 Feb 2008]
News Data throughput in the MoonLite system would range from up to 3kbps for the downlink and up to 2kbps for the uplink. Wireless from A to Z Click on the links below to find out more… A is for Antivirus B is for Bluetooth
[19 Feb 2008]
News Vodafone said its UK network has a top downlink speed of 7.2Mbps - in London and major airports - and a maximum of 1.44Mbps uplink. But the 50 per cent price will only run for a limited 'promotional period'.
[01 Feb 2008]
News HSUPA (high speed uplink packet) is rarer than HSDPA - with just 26 commercial networks launched in 22 countries - but there is evidence that momentum is building here too as all these launches occurred last year, with the vast majority taking...
[09 Jan 2008]
whitepaper Although the peak rates of downlink/uplink are specified as 2.4 Mbps/153 Kbps, the user-experienced application-layer throughput has not been much reported and analyzed. In this experiment, it was shown that average TCP throughputs over downlink...
[08 Jan 2008]
whitepaper This paper proposes a dual queue based scheme in an Access Point (AP) for TCP fairness among uplink flows and downlink flows. The proposed scheme employs two queues, one for the data packets of downlink TCP flows and another for the ACK packets...
[26 Dec 2007]
whitepaper 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...
[20 Dec 2007]
whitepaper The paper developed NS-2 based WiBro simulator that models the behavior of the uplink and downlink of the WiBro system. The main observations are as follows: the uplink service that carries TCP ACK can be a bottleneck and the performance of TCP...
[20 Dec 2007]
whitepaper This paper studies the capacity, i.e.the number of customers per cell, and the quality of service for streaming video in the uplink direction of a cellular Code Division Multiple Access (CDMA){based wireless system.
[19 Dec 2007]
News WiMax can also provide a faster uplink than ADSL: ConnectMK's offering offers upload speeds of between 512Kbps and 2Mbps. Run by a council-owned business called ConnectMK, the service offers local residents and businesses a wireless alternative to...
[19 Dec 2007]
whitepaper Scientific Atlanta will provide two PowerVu multiplexes for the delivery of Standard Definition (SD) and High-Definition (HD) programming from uplink facilities in Bethpage, NY. Rainbow Media Holdings LLC has selected multiple Scientific Atlanta...
[16 Nov 2007]
whitepaper The authors seek to make a contribution to this problem (where the wireless segment is a satellite uplink) by deriving analytical estimates of TCP throughput for two widely deployed approaches - TCP splitting and E2E (End-to-End) TCP with link...
[06 Nov 2007]
News However, the spectrum could also be used for wireless broadband services, such as HSPA (high-speed packet access, including high-speed downlink packet access or HSDPA, and high-speed uplink packet access or HSUPA) and WiMax.
[19 Oct 2007]
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