High-speed single-frequency network for HSDPA

Hytönen, Vesa P.; Puchko, Oleksandr; Höhne, Thomas; Chapman, Thomas

doi:10.1109/swe-ctw.2011.6082482

Cited by 5 publications

(7 citation statements)

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“…One of the schemes is HS-SFN where the same signal is transmitted on the same frequency and scrambling code from two cells. The main concept and first results were presented at [6], however results that were presented in the paper do not show maximum gain that can be achieved by using HS-SFN. Such things as "enhanced linear minimum mean square error (LMMSE) equalizer" and "Phase Adjustment" that will be described in this paper were not taken into account.…”

Section: Introductionmentioning

confidence: 89%

“…Such things as "enhanced linear minimum mean square error (LMMSE) equalizer" and "Phase Adjustment" that will be described in this paper were not taken into account. Furthermore results at [6] show the performance of HS-SFN under only one propagation channel model. This paper will present performance of HS-SFN usage under different channel models, such as ITU Pedestrian A and B at 3 km/h and Vehicular A at 30 km/h.…”

Section: Introductionmentioning

confidence: 99%

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Increasing the performance of HSDPA with high-speed single frequency network

Puchko

2012

Proceedings of the 15th ACM International Conference on Modeling, Analysis and Simulation of Wireless and Mobile Systems

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High Speed Single Frequency Network (HS-SFN) is a multicell transmission scheme for High-Speed Downlink Packet Access (HSDPA) that can assist user equipment (UEs) in the softer handover area by combining signals from two neighbouring cells and at the same time by reducing the inter-cell interference. This article analyzes performance of HS-SFN for macro cell scenario under different channels with different type of schedulers by means of extensive system level simulations. The results indicate that HS-SFN can increase throughput for UEs in softer handover area from 40% to 80% without decreasing the overall performance.

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Section: Introductionmentioning

confidence: 89%

Section: Introductionmentioning

confidence: 99%

Increasing the performance of HSDPA with high-speed single frequency network

Puchko

2012

Proceedings of the 15th ACM International Conference on Modeling, Analysis and Simulation of Wireless and Mobile Systems

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“…1. [3] In addition to the gained signal strength, also the strongest interferer is removed. The thus enhanced C/I may be expressed as…”

Section: A Background and Related Techniquesmentioning

confidence: 99%

“…Here we assume a 30 % control channel (pilots and signaling) overhead, thus 70 % is left for data on HS-PDSCH channel [3]. According to [3], HS-SFN can bring up to 25% of burst rate gain for low load for users in the softer handover area, but since the number of these users is not so big (around 4-5% from all UEs) gain for all UEs is not visible. One of the possible techniques that can increase performance of HS-SFN usage is enhanced equalizer.…”

Section: A Background and Related Techniquesmentioning

confidence: 99%

Phase Adjustment in HS-SFN for HSDPA

Puchko

Zolotukhin

Höhne

et al. 2012

2012 5th International Conference on New Technologies, Mobility and Security (NTMS)

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High Speed Single Frequency Network (HS-SFN) is one of the possible multi-cell transmission schemes for HighSpeed Downlink Packet Access (HSDPA). This technique helps user equipments (UEs) in the softer handover area by combining signals from two neighboring cells and also by reducing intercell interference. However, combining of two signals does not always have positive impact due to uncorrelated fast fading. This problem can be solved if the transmitted signals from the cells are adjusted such that the signals would arrive in phase. In this article the impact on HS-SFN is shown when phase adjustments are applied.

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“…This study item focused on single point data transmission, multiflow data transmission and single frequency network data transmission. Some interesting studies can be found in [10][11][12][17][18][19][20][21][22]. Currently, there is a parallel evolution with respect to LTE Rel-12, and Rel-11 HSDPA multiflow is being considered as an interesting extension for heterogeneous networks (macrosmall cell multiflow) [23,24].…”

Section: Introductionmentioning

confidence: 99%

Multi-user interference mitigation under limited feedback requirements for WCDMA systems with base station cooperation

2015

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One of the techniques that has been recently identified for dealing with multi-user interference in future communications systems is base station cooperation or joint processing. However, perfect multi-user interference cancellation with this technique demands severe synchronization requirements, perfect and global channel state information, and an increased backhaul and signaling overhead. In this paper, we consider a more realistic layout with the aim of mitigating the multi-user interference, where only local channel state information is available at the base stations. Due to synchronization inaccuracies and errors in the channel estimation, the system becomes partially asynchronous. In the downlink of WCDMA based systems, this asynchronism stands for the loss of the orthogonality of the spreading codes allocated to users and thus, for an increase in the multi-user interference level of the system. In this contribution, we propose a framework for mitigating the multi-user interference which builds in three main steps: definition of a cooperation area based on the channel characteristics, statistical modeling of the average multi-user interference power experienced by each user and a specific spreading code allocation scheme for users served with joint processing. This code allocation assigns spreading codes to users in such a way that minimum average cross-correlation between active users can be achieved. Interestingly, these steps can be

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High-speed single-frequency network for HSDPA

Cited by 5 publications

References 5 publications

Increasing the performance of HSDPA with high-speed single frequency network

Increasing the performance of HSDPA with high-speed single frequency network

Phase Adjustment in HS-SFN for HSDPA

Multi-user interference mitigation under limited feedback requirements for WCDMA systems with base station cooperation

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