Wide-band CDMA for the UMTS/IMT-2000 satellite component

Boudreau, D.; Caire, Giuseppe; Corazza, G.E.; Gaudenzi, R. De; Gallinaro, G.; Luglio, M.; Lyons, Richard G.; Romero-Garcia, J.; Vernucci, A.; Widmer, H.

doi:10.1109/25.994808

Cited by 53 publications

(43 citation statements)

References 20 publications

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“…Satellite-UMTS (S-UMTS) [3], with the capability to provide coverage over scarcely populated areas for true global roaming, is also expected to play a complementary role to the terrestrial-UMTS (T-UMTS), rather than as a stand-alone system as in the 2 nd generation mobile global satellite systems (Iridium, Globalstar, ICO), whereby the terrestrial and satellite mobile systems were developed independently. In addition, it is perceived that multicast/broadcast services can be more efficiently delivered by satellite than by the terrestrial system.…”

Section: Introductionmentioning

confidence: 99%

SIP-based session establishment over an integrated satellite-terrestrial 3G network

Kueh¹

2003

IP Over Satellite - The Next Generation: MPLS, VPN and DRM Delivered Services

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Session Initiation Protocol (SIP) has been selected by the Third Generation Partnership Project (3GPP) as the official end-to-end IP signalling protocol for establishing multimedia sessions in the IP-based Universal Mobile Telecommunication Systems (UMTS) network. Since a satellite component has been identified as part of the roll out of UMTS to provide an 'anytime, anyway' communication, there is a need to support SIPbased session establishment over Satellite-UMTS (S-UMTS) as well. Thus this paper aims at evaluating the performance of SIP-based session setup over the S-UMTS, taking into account the larger propagation delay over the satellite as well as the impact of the UMTS radio interface under different channel conditions. This paper presents a possible architecture for a seamless integration of an IP-based terrestrial/satellite network and describes how SIP-based sessions are established. The issue of incorporating a link layer retransmission based on the Radio Link Control acknowledgement mode (RLC-AM) mechanisms is also addressed and its implications on the SIP session establishment performance are examined.

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Section: Introductionmentioning

confidence: 99%

SIP-based session establishment over an integrated satellite-terrestrial 3G network

Kueh¹

2003

IP Over Satellite - The Next Generation: MPLS, VPN and DRM Delivered Services

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“…An asynchronous downlink WCDMA system in accordance with the model proposed in [10] is considered with two different cell loads (10 and 20 users) and two different mobile terminal speed (pedestrian 3km/h and vehicular 50km/h). Several Montecarlo simulations have been carried on according to the parameters shown in Table I.…”

Section: Simulation Resultsmentioning

confidence: 99%

“…, where G is the spreading factor and H is the length of the scrambling code [10]. A single-path transmission (L = 1) has been here considered since both the near and the far echoes (lower replicas of the transmitted signal) power is at least 15 dB below the first path and hence there is no visible advantage in detecting them [4].…”

Section: Introductionmentioning

confidence: 99%

Space-Time MMSE Reception in Multi-Satellite UMTS

Mucchi

Palandri

et al.

GLOBECOM '03. IEEE Global Telecommunications Conference (IEEE Cat. No.03CH37489)

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“…Due to its large coherence bandwidth, satellite channels do not offer high frequency diversity that is usually exploited in terrestrial CDMA cellular systems through maximal ratio combining (MRC) and RAKE receivers. Therefore, spatial transmit diversity through simultaneous transmissions from two or more satellites jointly covering the cell of interest has gained much interest recently [13]. In most of the developed satellite constellations, there are usually multiple satellites jointly visible to user and gateway, and call can be simultaneously established through two different links -one on each satellite.…”

Section: Introductionmentioning

confidence: 99%

“…k,l (g +(n mod (H/G))G), where G is the spreading factor and H is the length of the scrambling code [13]. A single-path transmission (L = 1) has been here considered since both the near and the far echoes (lower replicas of the transmitted signal) power is at least 15 dB below the first path and hence there is no visible advantage in detecting them [5].…”

Section: Introductionmentioning

confidence: 99%