[논문]Fixed Relays for Next Generation Wireless Systems - System Concept and Performance Evaluation

Pabst Ralf; Esseling Norbert; Walke Bernhard H.

doi:10.1109/jcn.2005.6387858

Fixed Relays for Next Generation Wireless Systems - System Concept and Performance Evaluation 원문보기

Journal of communications and networks, v.7 no.2, 2005년, pp.104 - 114

Pabst Ralf (Chair of Communication Networks at RWTH Aachen University) , Esseling Norbert (Chair of Communication Networks when this work was performed) , Walke Bernhard H. (Chair of Communication Networks at RWTH Aachen University)

Abstract ▼ AI-Helper

This work presents a concept and the related analysis of the traffic performance for a wireless broadband system based on fixed relay stations acting as wireless bridges. The analysis focuses on the important performance indicators end-to-end throughput and delay, taking into account the effects of an automated repeat request protocol. An extension to a MAC frame based access protocol like IEEE 802.11e, 802.15.3, 802.16a, and HIPERLAN2 is outlined and taken as basis for the calculations. The system is intended for both dense populated areas as an overlay to cellular radio systems and to provide wide-area broad-band coverage. The two possible deployment scenarios for both dense urban and wide-area environments are introduced. Analytical and validating simulation results are shown, proving the suitability of the proposed concept for both of the mentioned scenarios. It is established that the fixed relaying concept is well suited to substantially contribute to provide high capacity cellular broad-band radio coverage in next generation (NG) cellular wireless broadband systems.

주제어

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문제 정의

Further more, future broadband radio systems will suffer from a high signal attenuation due to obstacles, leading either to an excessive amount of APs or to a high probability that substantial parts of the service area are shadowed from its AP. By means of traffic performance analysis, this paper establishes that a system based on fixed mounted relay stations is well suited to overcome the problems mentioned. The paper is organised as follows.
The latter system is taken to exemplify a detailed solution. This paper focuses on the analytical evaluation of the presented relaying concept. Section II presents the most important parameters and the deployment scenarios used to obtain the performance results.

제안 방법

The paper is organised as follows. The introduction explains the advantages of relaying, presents fun damentals on how the proposed relaying concepts works in general and finally explains how to "misuse" existing standards to enable relaying in the time domain for wireless broadband systems based on a periodic medium access control (MAC) frame, as used in IEEE 802.1 le, 802.15.3, 802.16a, and HIPERLAN₂. The latter system is taken to exemplify a detailed solution.
the (R)MT. A more detailed evaluation is presented later in this paper, which also takes into account varying ratios of AP- FRS and FRS-RMT distances by assuming a fixed position of the FRS with respect to the AP and a varying position of the RMT.
11a standard. As indicated in Section I, the 5 GHz frequency range is characterised by hi흥h attenuation and very low diffraction, leading to low radio range, which is one of the key problems adressed by the proposed re laying concept.
The basis for the calculation of the transmission errors is the ratio of carrier to interference and noise power (C/(/+7V)). The extensive link-level investigations performed in [13] provide a PDU error-probability related to the average C/{I + N) (taking into account co-channel interference) during reception of the PHY-PDU.
Previous work on analytical estimation of the capacity of networks based on fixed relays has mostly approached the issue from the view-point of information theory, thereby deriving the oretical performance bounds as shown in [6] and [7]. This paper takes into account a specific protocol approach that fits into the framework of existing standards with a periodic MAC frame structure. It thereby focuses on a relaying-enabled medium access control (MAC) and a selective-repeat type automatic repeat request (ARQ) protocol.

대상 데이터

9 shows the maximum achievable downlink end-to-end throughput versus the distance (in in direction) of a MT from the AP (marked with 1 hop) and the throughput encountered by MTs being served by a FRS (marked with 2 hop). The FRS are located at a distance of 200 m from the AP (shown in the pictogram). The maximum of the 2nd- hop throughput curve can be found where the terminal's distance from the FRS is minimal.
2(b). The most important parameters of the scenario are the block size of 200 m and the street width of 30 m. An exemplary deployment scenario without relays is shown in Fig.

이론/모형

, a street comer. The COST259 propagation model (see Section III-B) was used and the walls were assumed to have an attenuation of 11, 8 dB each. The shaded area highlights that the 2-hop communication gains over one hop, starting at a distance of about 50m only.

참고문헌 (19)

R. Pabst et al., 'Relay-based deployment concepts for wireless and mobile broadband radio,' IEEE Commun. Mag., pp. 80-89, Sept. 2004
H. Yanikomeroglu, 'Fixed and mobile relaying technologies for cellular networks,' in Proc. 2nd Workshop on Applications and Services in Wireless Networks (ASWN 2002), Paris, France, July 2002, pp. 75-81
IETF, http://www.ietf.org/html.charters/manet-charter.html
M. Gerla et al., 'TCP over wireless multihop protocols: Simulation and experiments,' in Proc. IEEE ICC'99, 1999
G. Holland and N. Vaidya, 'Analysis of TCP performance over wireless ad hoc networks,' Wireless Networks, vol. 8, no. 2-3, pp. 275-288, 2002

상세보기
H. Viswanathan and S. Mukherjee, 'Performance of cellular networks with relays and centralized scheduling,' in Proc. VTC Fall 2003, vol. 3, Orlando, FL, Oct. 2003, pp. 1923-1928
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N. Esseling, H. Vandra, and B. Walke, 'A forwarding concept for HIPERLAN/2,' in Proc. European Wireless 2000, Dresden, Germany, Sept. 2000, pp.13-17
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J. Khun-Jush et al., 'Structure and performance of the HIPERLAN 12 physical layer,' in Proc. IEEE VTC Fall'99, Amsterdam, Netherlands, Sept. 1999, pp. 2667-2671
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I. Forkel and M. Salzmann, 'Radio propagation modelling and its application for 3G mobile network simulation,' in Proc. 10-th Aachen Symposium on Signal Theory, Aachen, Germany, Sept. 2001, pp. 363-370
R. van Nee and R. Prasad, OFDM for Wireless Multimedia Communications, Boston, London: Artech House Publishers, 2000
L. M. Correia, ed., Wireless Flexible Personalised Communications, COST 259: European Co-operation in Mobile Radio Research, Wiley, 2001
E. Damosso and L. M. Correia, eds, 'COST 231 final report - digital mobile radio: Evolution towards future generation systems,' Brussels, Belgium: COST Secretariat, European Commission, 1999
BRAIN, 'D 3.1: Technical requirements and identification of necessary enhancements for HTPERLAN Type 2,' IST-1999-10050 BRAIN WP3 air interface, Deliverable, Sept. 2000

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DOI : 10.1109/JCN.2005.6387858 [무료]
IEEE : 저널 > 논문

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