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News Raising the example of Korea, he noted the availability of models which combine both HSDPA (high-speed downlink packet access) and WiBro (wireless broadband) functionality. Teresa Kellett, director of global development for telco Sprint Nextel...
[11 Apr 2008]
whitepaper Three new interference cancellation techniques suitable for the downlink of any CDMA system with orthogonal spreading are proposed. In this paper, successive intracell interference cancellation (IIC) of the wideband-code division multiple access (W...
[10 Apr 2008]
whitepaper In this paper, an adaptive downlink modulation using OFDM and MC-CDMA is presented for maximizing the system capacity and actualizing QoS (Quality of Service) control of future mobile communications. To meet the strong demand for broadband...
[10 Apr 2008]
whitepaper Multiuser orthogonal frequency division multiplexing (MU-OFDM) is a promising technique for achieving high downlink capacities in future cellular and wireless LAN systems. The sum capacity of MU-OFDM is maximized when each subchannel is assigned to...
[10 Apr 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]
News There are now 637 high speed downlink packet access products on the market, with almost half (303) of them being mobile phones. The number of 3.5G devices on the market is mushrooming with 150 per cent annual growth in HSDPA gizmos, according to...
[07 Apr 2008]
News This mobile broadband 'dongle mania' is being driven by ongoing 3.5G rollouts (aka HSDPA networks - or high speed downlink packet access). The Infonetics Research Mobility: Broadband, Phones, Subscribers and Services report predicts the mobile data...
[28 Mar 2008]
whitepaper This paper covers HSDPA, High Speed Downlink Packet Access. HSDPA is based on WCDMA evolution, standardized as part of 3GPP Release 5 WCDMA specifications. The new modulation method of HSDPA greatly improves the peak data rate and throughput, which...
[12 Mar 2008]
News Currently, the iPhone can only access Edge networks - often referred to as 2.75 G, as they offer speeds above GPRS networks but below the lowest speed 3G networks - which are capable of providing a downlink in the low hundreds of Kbps.
[03 Mar 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]
whitepaper This paper proposes a system to transmit multiple 3-D embedded wavelet video programs over downlink multi-user OFDM. The paper considers the fairness among users and formulates the problem as minimizing the users' maximal distortion subject to...
[23 Jan 2008]
whitepaper This paper analyses the impact of this bandwidth oscillation phenomenon on TCP connections over a downlink UMTS channel. Prioritisation based on traffic class is widely used within radio resource control strategies to provide Quality of Service...
[14 Jan 2008]
News HSDPA, or high speed downlink packet access, is a beefed up flavour of 3G capable of delivering downlink speeds of up to a theoretical maximum of 7.2Mbps. Almost two-thirds (62 per cent) of existing commercial HSDPA networks support downlink speeds...
[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 Coupled with a robust and efficient OFDM air interface, MIMO technologies lead to a very compelling high-speed data downlink solution for future wireless systems. This paper presents Nortel Networks' MIMO-OFDM concept prototype and measured...
[07 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 Data transfer on the UMTS downlink can be done either through Dedicated Channels (DCH) or shared channel (FACH). The data transfers on the DCHs can receive very high throughputs. However, a setup time of the order of 250ms is required before data...
[26 Dec 2007]
whitepaper It is due to the behavior of the TCP flow control in the infrastructure WLAN, where the downlink (i.e. Today, IEEE 802.11 Wireless LAN (WLAN) is a prevailing solution for the wireless Internet access while Transport Control Protocol (TCP) is the...
[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]
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