Cellular Mobile Radio Networks Design

Save this PDF as:
 WORD  PNG  TXT  JPG

Size: px
Start display at page:

Download "Cellular Mobile Radio Networks Design"

Transcription

1 Cellular Mobile Radio Networks Design Yu-Cheng Chang Ph. D. Candidate, Department of Technology Management Chung Hua University, CHU Hsinchu, Taiwan Chi-Yuan Chang CMC Consulting, Inc. Taichung, Taiwan Ching Chang Department of Transportation Technology and Logistics Management Chung Hua University, CHU Hsinchu, Taiwan Guang-Yu Tu Physical Education Ling Tung University, LTU Taichung, Taiwan Abstract Two aspects of cellular radio systems design are covered in this work. First, is a way of evaluating a cellular system with a given configuration, including coverage, cochannel interference, and traffic capacity considerations. Second, based on this evaluation scheme, Simulated Annealing is used to improve the system performance by varying system parameters such as site channel assignment, site power, antenna azimuth, and antenna down-tilt. The main improvement of this work over previous reports is two-fold. First, calculations of the co-channel interference are direct. In comparison, a common practice is to use a compatibility matrix or similar measure for interference. A single number is then used to characterize the interference between a pair of sites / cells, which is an over simplification because interference varies for different points in the cell served by a site. It is the collective results of all other cells using the cochannel and not only just between the two sites. Furthermore, interference in both directions, uplink and downlink, need be included. Uplink is the weaker link in general and is commonly ignored in the compatibility matrix. The second improvement is that the entire area distribution of traffic is used in this work as opposed to the common practice of using total traffic at each site. Keywords: coverage; co-channel interference; cellular system I. INTRODUCTION In real-world cellular systems, the use of hexagonal cell cluster deployment is standard [1], yet impractical. Site location limitations and irregular terrain render the standard cell configuration inaccurate, however, the basic principles of cellular design are unchanged. The goal is to design a system that provides sufficient radio coverage, tolerable co-channel interference, and highest possible capacity. These three factors are interrelated and sometimes contradictory to each other. Along with system traffic distribution, they make the system design a complex problem. Among all the factors, co-channel interference is the most complex and difficult to deal with. Co-channel interference exists in both uplinks and downlinks and is dependent upon the RSSI (Received Signal Strength Indicator) distribution, traffic distribution, site locations, and the location of the point under consideration. Some researchers choose a simplified treatment by using a compatible matrix [2-5]. The shortfall with this type of simplification is that one cannot use just one number to characterize the interference between a pair of sites / cells, let alone the meaning of that number. Interference varies at different points in a cell. Furthermore, even at the same point, interference is different on different channels. It has many dimensions and cannot be sufficiently represented by a single number. Some authors try to minimize the number of interfering base stations [6]. The problem is that lower number of interfering sites does not necessarily mean lower interference. In both cases, only the downlink seems to be included. It is well known, that the uplink is often the weaker one and cannot be ignored in the model. In this work, the interference is calculated for the entire service area, uplinks and downlinks; and for each possible channel for that point, using the geographic traffic distribution. When this interference is lowered, the communications quality is improved. One practical example is used to demonstrate different aspects of the modeling work and calculations. Also, since the current configuration of this example is known, any improvement can be compared against it. A sector and a cell are synonymous for the rest of this paper unless otherwise stated. II. THE EXAMPLE A deployed system in KeeLung is used because of its geographic isolation by the shoreline and hilly terrain surrounding the city. This is shown in Fig. 1 below. Figure 1 Terrain Map of the Example System The largest polygon depicts the service area. There are 88 sites shown by the circles, and each site has up to 5 sector antennas, for a total of 202 sectors. Sixty-six channels are used and reused among the 202 sectors. Each channel has 8 TDMA time slots, with one of them used for control and the other 7 slots are for traffic. There are 15 types of antennas /11/$ IEEE

2 with different horizontal and vertical patterns. Some patterns are shown below. Figure 2 Example Horizontal Pattern Figure 3 Example Vertical Pattern Figure 4 Current System Figure 4-1 Zoomed-in View of Current System The current system is shown in Fig. 4 The spikes show the sector antenna s horizontal orientations. The smaller polygons represent increasingly denser areas and will use finer grids in the calculations. Fig. 4-1 shows the smaller polygons in more details. The minimum required RSSI for communication is 104 dbm for the uplink and 100 dbm for the downlink. The minimum S/I ratio is 15 db for both links. The EIRP of all sector antennas are given in the original data file in dbm. The maximum EIRP for the MS units is 500 mw. This EIRP is lowered by the system power control as the MS moves closer to the BS. The loss due to the site cable etc. is assumed to be 3 db. The loss at the BS unit is assumed to be 10 db. The building/environment loss is set at 12 db. This loss is in addition to the terrain propagation loss. The traffic file indicates that the 22 nd hour is the busiest hour and the traffic for that hour is used for analysis. For calculation efficiency purposes, three tiers of grids are used. The grid sizes are 300, 800, and 3000 points per arc degree respectively. Propagation losses from each sector antenna to each grid point are calculated using TIREM [7]. In order to apply the vertical antenna pattern, the depression angles are also calculated [8]. Sector antenna heights are given in the original data file. Mobile antenna height is set at 5 feet. Three-second terrain elevation data are used. Since the original data file contains only combined traffic at each sector, the traffic need be spread out to obtain an area traffic distribution. This is done by first finding out the extent of each cell. Then the traffic of each sector is evenly distributed over the cell it serves. The cell extent is found by assigning each grid point to the sector, which has the highest RSSI at the point. The traffic distribution is uniform at this point in each cell. Later on when system parameters are varied, cell extent will also vary and will no longer be uniform in each cell. An (Objective Function, OF) for the system is evaluated in the following way for a given system configuration. For each grid point, if the RSSI in either uplink or downlink direction is below the threshold, the traffic in that cell is excluded from further consideration. Next, interferences in both directions are calculated assuming a full load situation, i.e. all assigned channels at all cells are being used. This is performed for all possible channels at that point, i.e. all channels assigned to the home sector. If the SIR in either direction is lower than the 15 db threshold, traffic from that grid point has excessive interference on that channel. Overall, the amount of interfered traffic is proportional to the number of channels with excessive interference. For the downlink, the total interference is simply the summation of signals from all other sectors using the same channel. For the uplink, the total interference from all other cells using the same channel are averaged and summed. Averaging is necessary because the mobile unit can be anywhere in the cell. Traffic is used as the weighting factor in the averaging process. The total traffic in each cell is now compared against the capacity of all assigned channels at the sector and excess traffic is simply blocked. In this work, queuing is not included. The contribution to the Objective Function from the grid point under consideration has two parts. The first part is positive and consists of the carried traffic. The second part is negative and is composed of the traffic, which experience excessive interference as calculated above. So, first the OF has all

3 carried traffic. Second, any traffic which experience excessive interference at full load in either direction cause a penalty and decrease the OF value: OF = T i W N i (1) i Here T i is carried traffic from grid point i; i N i is interfered traffic at point i; W is a weighting factor. The summations are over all grid points. W represents the importance of the full load interference. W is set to 1 in this work. It can be set to other values as needs arise. During evaluation of the OF, the blocked traffic and the traffic excluded because of low RSSI are also obtained. These two parts are implied by the first term of the OF. This OF provides a measure for the system communications quality and is used in the improvement process. III. IMPROVEMENT PROCESS System performance can be improved by varying system parameters to achieve a higher value of the OF. Simulated Annealing is used for that purpose [9]. Overall algorithm is shown in below: Initialize system. Calculate OF old. Set Initial temperature t. While t < final t do: Do until equilibrium is reach: Randomly find a neighborhood point in the configuration space. Calculate OF new of the new point. If OF new > OF old or exp ((OF new - OF old )/t ) > random, adopt new point. t is decremented. A. Temperature And Equilibrium The initial temperature is set such that a new configuration is adopted with high probability regardless of the OF. In this work, the initial temperature is calculated as follows: Initial t = 200 / (log (1/ar ) (2) Where ar is a high acceptance rate and log denotes the natural logarithm. A value of is used for ar in this work. During the initialization, a seed system configuration is established as a starting point. The current configuration is used as a seed in this work. Which configuration is used is really not critical. The final temperature is a positive number very close to 0. A 1.0E-8 is used here. For equilibrium purposes, the number of transitions at a particular temperature depends on the nature of the problem and the number of variables. Stable results are obtained with 200 of transition tries for this example. Temperature is cooled each time by a factor of 0.9. The random number, random, is between 0 and 1. B. Configuration Space The configuration space neighborhood structure is determined by the action taken at each transition try. There are 5 possibilities. For each transition try, a sector is randomly selected. Each possible action occurs with equal probability: Add a channel: If a sector already has 4 channels, skip this action. Otherwise a channel in the available channel pool is randomly selected such that the selected channel number is different from any assigned channel number by at least 2. This is to avoid assigning a channel twice to the same sector and to avoid adjacent channel assignment. Drop a channel: If a sector only has 1 channel, skip this action. Otherwise a channel is randomly selected and dropped. Vary the azimuth: The azimuth is incremented or decremented by 5 degrees with equal probability. If the azimuth is at 0 degree it can only be incremented and it can only be decremented if it is 355 degrees. Vary the down-tilt: The down-tilt is from 0 to 9 degrees and is varied 1 degree in either direction at a time. At 0 / 9, it can only increase / decrease. Vary EIRP: EIRP can be varied up to plus or minus 4 db s, 1 db at a time. The EIRP factor is varied by 1 or 1 at a time. C. Calculations Efficiency Aside from using the heterogeneous grid system, calculations in the SA process need also be streamlined. RSSI from all sites to all points in the service area are calculated beforehand. An uplink interference table is also calculated before the SA improvement process. This table contains interference from every cell to every point in the service area. As SA proceeds, cells change, home sectors also vary, RSSI change, etc. So the pre-calculated RSSI and the uplink interference tables change and need updates constantly. With each transition in the SA process, it is necessary to determine which quantities of which sectors are altered and make the updates. The changes are all collected and updated. This is necessary in order to cut down the computation. One invaluable check we have is for any configuration and the objective function OF 1, either during or after the SA process, we can start from scratch and calculate all tables and the objective function OF 2. Equality of OF 1 and OF 2 means that we have made all necessary updates to the tables. IV. SA RESULTS The above SA scheme is applied to the example location in two parts. In the first part, the current traffic is used and in the second part, the traffic is enhanced by a factor of 3. Improved system performance is compared with that of the

4 current configuration in both cases. The results for the current traffic are shown below in Table 1. TABLE I. RESULTS FOR CURRENT TRAFFIC LOAD, ENTRIES ARE IN ERLANGS Objective Function Carried Low RSSI Blocked Interfered Current Configuration SA Improved Improvement Percentage Improve N/A 99.6 Since the current system is lightly loaded, the improvement on the carried traffic is only 1.3 percent. The Improvement on the excluded traffic because of low RSSI is 15.2 percent. The more impressive item is the interference: nearly all interferences are eliminated! One thing worth mentioning is that, for the current configuration, close to 80 percent of the interfered traffic have their interference in the uplink. After SA Improvement, the remaining interferences are almost all on the downlink. Results for the system with three times of the current traffic are shown in Table 2 below: TABLE II. Current Configuration RESULTS FOR THREE TIMES CURRENT TRAFFIC LOAD, ENTRIES ARE IN ERLANGS Objective Function Carried Low RSSI Blocked Interfered SA Improved Improvement Percentage Improve We have shown a general scheme for evaluating a cellular mobile radio system. An objective function is introduced based on this scheme. Furthermore, we have shown the application of SA to enhance the system performance by improving the objective function. In this work, only some of the variables are altered. One could conceivably include site cost considerations in the scheme. Also, the number of sectors can be increases and more channels can be allocated at each sector. When all these possibilities are included, system performance can be improved further. REFERENCES [1] Mehrotra, A. Cellular Radio Performance Engineering, Artech House, [2] Wong, W., and C.K. Rushforth, An Adaptive Local-Search Algorithm for the Channel-Assignment Problem (ACP), IEEE Trans. on Vehicular Technology, Vol. 45, No. 3, Aug. 1996, pp [3] Kim, S., and S-L. Kim, A Two-Phase Algorithm for Frequency Assignment in Cellular Mobile Systems, IEEE Trans. On Vehicular Technology, Vol. 43, No. 3, Aug 1994, pp [4] Catedra, Manuel F., and Perez-Arriaga, Jesus, Cell Planning For Wireless Communicaions, Artech House, [5] Duque-Anton, M, Kunz D., and Ruber, B., Channel Assignment for Cellular Radio Using Simulated Annealing, IEEE Trans on Vehicular Technology, Vol. 42, No. 1, Feb. 1993, pp [6] Hurley, S., Planning Effective Cellular Mobile Radio Networks, IEEE Trans. On Vehicular Technology, Vol. 51, No. 2, Mar. 2002, pp [7] IEEE Trans. On Vehicular Technology, Vol. 37, No. 1, Feb [8] Giger, A. J., Low-Angle Microwave Propagation: Physics and Modelling, Artech House, [9] Laarhoven, P. J. van, and Aarts, E. H. L., Simulated Annealing: Theory and Applications, D. Reidel Publishing Company, The purpose of the second part is to demonstrate the effect of loading the system to a significantly higher traffic level. The SA improved configuration shows much better system performance than the legacy system. The carried traffic is increased by 15.8 percent. The low RSSI traffic is reduced by 12.1 percent. The most impressive improvements come from the last two columns: the blocking and interference are almost all gone. As in the first part, while the legacy system has most of its interference in the uplink, the remaining interferences after SA improvement are mostly in the downlink. The improvement on the carried traffic is limited because the total numbers of channels, which can be allocated to a sector are no more than four. Furthermore, the number of sectors at each site cannot be altered. The low RSSI traffic / coverage improvement is limited by the current site locations. Coverage can be further improved by putting more sites where coverage is poor. This is not explored in the current work. V. CONCLUSION

03_57_104_final.fm Page 97 Tuesday, December 4, :17 PM. Problems Problems

03_57_104_final.fm Page 97 Tuesday, December 4, :17 PM. Problems Problems 03_57_104_final.fm Page 97 Tuesday, December 4, 2001 2:17 PM Problems 97 3.9 Problems 3.1 Prove that for a hexagonal geometry, the co-channel reuse ratio is given by Q = 3N, where N = i 2 + ij + j 2. Hint:

More information

HIERARCHICAL microcell/macrocell architectures have

HIERARCHICAL microcell/macrocell architectures have 836 IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY, VOL. 46, NO. 4, NOVEMBER 1997 Architecture Design, Frequency Planning, and Performance Analysis for a Microcell/Macrocell Overlaying System Li-Chun Wang,

More information

Deployment and Radio Resource Reuse in IEEE j Multi-hop Relay Network in Manhattan-like Environment

Deployment and Radio Resource Reuse in IEEE j Multi-hop Relay Network in Manhattan-like Environment Deployment and Radio Resource Reuse in IEEE 802.16j Multi-hop Relay Network in Manhattan-like Environment I-Kang Fu and Wern-Ho Sheen Department of Communication Engineering National Chiao Tung University

More information

Sharing Considerations Between Small Cells and Geostationary Satellite Networks in the Fixed-Satellite Service in the GHz Frequency Band

Sharing Considerations Between Small Cells and Geostationary Satellite Networks in the Fixed-Satellite Service in the GHz Frequency Band Sharing Considerations Between Small Cells and Geostationary Satellite Networks in the Fixed-Satellite Service in the 3.4-4.2 GHz Frequency Band Executive Summary The Satellite Industry Association ( SIA

More information

UNIT-II 1. Explain the concept of frequency reuse channels. Answer:

UNIT-II 1. Explain the concept of frequency reuse channels. Answer: UNIT-II 1. Explain the concept of frequency reuse channels. Concept of Frequency Reuse Channels: A radio channel consists of a pair of frequencies one for each direction of transmission that is used for

More information

ECE 476/ECE 501C/CS Wireless Communication Systems Winter Lecture 3: Cellular Fundamentals

ECE 476/ECE 501C/CS Wireless Communication Systems Winter Lecture 3: Cellular Fundamentals ECE 476/ECE 501C/CS 513 - Wireless Communication Systems Winter 2004 Lecture 3: Cellular Fundamentals Chapter 3 - The Cellular Concept - System Design Fundamentals I. Introduction Goals of a Cellular System

More information

Ad Hoc Resource Allocation in Cellular Systems

Ad Hoc Resource Allocation in Cellular Systems Appears in Proceedings of 1999 IEEE Radio and Wireless Conference (RAWCON99), pg. 51. Ad Hoc Resource Allocation in Cellular Systems Abstract A fundamental question in a wireless cellular system is how

More information

Heterogeneous Networks (HetNets) in HSPA

Heterogeneous Networks (HetNets) in HSPA Qualcomm Incorporated February 2012 QUALCOMM is a registered trademark of QUALCOMM Incorporated in the United States and may be registered in other countries. Other product and brand names may be trademarks

More information

ECE 5325/6325: Wireless Communication Systems Lecture Notes, Spring 2010

ECE 5325/6325: Wireless Communication Systems Lecture Notes, Spring 2010 ECE 5325/6325: Wireless Communication Systems Lecture Notes, Spring 2010 Lecture 2 Today: (1) Frequency Reuse, (2) Handoff Reading for today s lecture: 3.2-3.5 Reading for next lecture: Rap 3.6 HW 1 will

More information

EKT 450 Mobile Communication System

EKT 450 Mobile Communication System EKT 450 Mobile Communication System Chapter 6: The Cellular Concept Dr. Azremi Abdullah Al-Hadi School of Computer and Communication Engineering azremi@unimap.edu.my 1 Introduction Introduction to Cellular

More information

Chapter 8 Traffic Channel Allocation

Chapter 8 Traffic Channel Allocation Chapter 8 Traffic Channel Allocation Prof. Chih-Cheng Tseng tsengcc@niu.edu.tw http://wcnlab.niu.edu.tw EE of NIU Chih-Cheng Tseng 1 Introduction What is channel allocation? It covers how a BS should assign

More information

Adaptive Modulation, Adaptive Coding, and Power Control for Fixed Cellular Broadband Wireless Systems: Some New Insights 1

Adaptive Modulation, Adaptive Coding, and Power Control for Fixed Cellular Broadband Wireless Systems: Some New Insights 1 Adaptive, Adaptive Coding, and Power Control for Fixed Cellular Broadband Wireless Systems: Some New Insights Ehab Armanious, David D. Falconer, and Halim Yanikomeroglu Broadband Communications and Wireless

More information

CHANNEL ASSIGNMENT AND LOAD DISTRIBUTION IN A POWER- MANAGED WLAN

CHANNEL ASSIGNMENT AND LOAD DISTRIBUTION IN A POWER- MANAGED WLAN CHANNEL ASSIGNMENT AND LOAD DISTRIBUTION IN A POWER- MANAGED WLAN Mohamad Haidar Robert Akl Hussain Al-Rizzo Yupo Chan University of Arkansas at University of Arkansas at University of Arkansas at University

More information

Analysis of RF requirements for Active Antenna System

Analysis of RF requirements for Active Antenna System 212 7th International ICST Conference on Communications and Networking in China (CHINACOM) Analysis of RF requirements for Active Antenna System Rong Zhou Department of Wireless Research Huawei Technology

More information

M Y R E V E A L - C E L L U L A R

M Y R E V E A L - C E L L U L A R M Y R E V E A L - C E L L U L A R The hexagon cell shape If we have two BTSs with omniantennas and we require that the border between the coverage area of each BTS is the set of points where the signal

More information

Load Balancing for Centralized Wireless Networks

Load Balancing for Centralized Wireless Networks Load Balancing for Centralized Wireless Networks Hong Bong Kim and Adam Wolisz Telecommunication Networks Group Technische Universität Berlin Sekr FT5 Einsteinufer 5 0587 Berlin Germany Email: {hbkim,

More information

Level 6 Graduate Diploma in Engineering Wireless and mobile communications

Level 6 Graduate Diploma in Engineering Wireless and mobile communications 9210-119 Level 6 Graduate Diploma in Engineering Wireless and mobile communications Sample Paper You should have the following for this examination one answer book non-programmable calculator pen, pencil,

More information

Unit-1 The Cellular Concept

Unit-1 The Cellular Concept Unit-1 The Cellular Concept 1.1 Introduction to Cellular Systems Solves the problem of spectral congestion and user capacity. Offer very high capacity in a limited spectrum without major technological

More information

Deployment scenarios and interference analysis using V-band beam-steering antennas

Deployment scenarios and interference analysis using V-band beam-steering antennas Deployment scenarios and interference analysis using V-band beam-steering antennas 07/2017 Siklu 2017 Table of Contents 1. V-band P2P/P2MP beam-steering motivation and use-case... 2 2. Beam-steering antenna

More information

EENG473 Mobile Communications Module 2 : Week # (4) The Cellular Concept System Design Fundamentals

EENG473 Mobile Communications Module 2 : Week # (4) The Cellular Concept System Design Fundamentals EENG473 Mobile Communications Module 2 : Week # (4) The Cellular Concept System Design Fundamentals Frequency reuse or frequency planning : The design process of selecting and allocating channel groups

More information

DISTRIBUTED DYNAMIC CHANNEL ALLOCATION ALGORITHM FOR CELLULAR MOBILE NETWORK

DISTRIBUTED DYNAMIC CHANNEL ALLOCATION ALGORITHM FOR CELLULAR MOBILE NETWORK DISTRIBUTED DYNAMIC CHANNEL ALLOCATION ALGORITHM FOR CELLULAR MOBILE NETWORK 1 Megha Gupta, 2 A.K. Sachan 1 Research scholar, Deptt. of computer Sc. & Engg. S.A.T.I. VIDISHA (M.P) INDIA. 2 Asst. professor,

More information

MOBILE COMMUNICATIONS (650520) Part 3

MOBILE COMMUNICATIONS (650520) Part 3 Philadelphia University Faculty of Engineering Communication and Electronics Engineering MOBILE COMMUNICATIONS (650520) Part 3 Dr. Omar R Daoud 1 Trunking and Grade Services Trunking: A means for providing

More information

ECE 5325/6325: Wireless Communication Systems Lecture Notes, Fall Increasing Capacity and Coverage. Lecture 4

ECE 5325/6325: Wireless Communication Systems Lecture Notes, Fall Increasing Capacity and Coverage. Lecture 4 ECE 5325/6325: Wireless Communication Systems Lecture Notes, Fall 2011 Lecture 4 Today: (1) Sectoring (2) Cell Splitting Reading today: 3.7; Tue: 4.1-4.3, 4.9. HW 1 due Friday 10am in HW locker (#3). Please

More information

UNIK4230: Mobile Communications Spring Per Hjalmar Lehne Tel:

UNIK4230: Mobile Communications Spring Per Hjalmar Lehne Tel: UNIK4230: Mobile Communications Spring 2015 Per Hjalmar Lehne per-hjalmar.lehne@telenor.com Tel: 916 94 909 Cells and Cellular Traffic (Chapter 4) Date: 12 March 2015 Agenda Introduction Hexagonal Cell

More information

EENG473 Mobile Communications Module 2 : Week # (8) The Cellular Concept System Design Fundamentals

EENG473 Mobile Communications Module 2 : Week # (8) The Cellular Concept System Design Fundamentals EENG473 Mobile Communications Module 2 : Week # (8) The Cellular Concept System Design Fundamentals Improving Capacity in Cellular Systems Cellular design techniques are needed to provide more channels

More information

EasyChair Preprint. A User-Centric Cluster Resource Allocation Scheme for Ultra-Dense Network

EasyChair Preprint. A User-Centric Cluster Resource Allocation Scheme for Ultra-Dense Network EasyChair Preprint 78 A User-Centric Cluster Resource Allocation Scheme for Ultra-Dense Network Yuzhou Liu and Wuwen Lai EasyChair preprints are intended for rapid dissemination of research results and

More information

Analysis Techniques for WiMAX Network Design Simulations

Analysis Techniques for WiMAX Network Design Simulations Technical White Paper Analysis Techniques for WiMAX Network Design Simulations The Power of Smart Planning 1 Analysis Techniques for WiMAX Network Jerome Berryhill, Ph.D. EDX Wireless, LLC Eugene, Oregon

More information

ECS455 Chapter 2 Cellular Systems

ECS455 Chapter 2 Cellular Systems ECS455 Chapter 2 Cellular Systems 2.2 Co-Channel Interference r.rapun Suksompong prapun.com/ecs455 Office Hours: BK 360-7 Tuesday 9:30-0:30 Tuesday 3:30-4:30 Thursday 3:30-4:30 Co-Channel Cells: Ex. N

More information

ECE 5325/6325: Wireless Communication Systems Lecture Notes, Spring 2013

ECE 5325/6325: Wireless Communication Systems Lecture Notes, Spring 2013 ECE 5325/6325: Wireless Communication ystems Lecture Notes, pring 2013 Lecture 2 Today: (1) Channel Reuse Reading: Today Mol 17.6, Tue Mol 17.2.2. HW 1 due noon Thu. Jan 15. Turn in on canvas or in the

More information

The Cellular Concept. History of Communication. Frequency Planning. Coverage & Capacity

The Cellular Concept. History of Communication. Frequency Planning. Coverage & Capacity The Cellular Concept History of Communication Frequency Planning Coverage & Capacity Engr. Mian Shahzad Iqbal Lecturer Department of Telecommunication Engineering Before GSM: Mobile Telephony Mile stones

More information

Chapter 3: Cellular concept

Chapter 3: Cellular concept Chapter 3: Cellular concept Introduction to cellular concept: The cellular concept was a major breakthrough in solving the problem of spectral congestion and user capacity. It offered very high capacity

More information

UNIK4230: Mobile Communications Spring 2013

UNIK4230: Mobile Communications Spring 2013 UNIK4230: Mobile Communications Spring 2013 Abul Kaosher abul.kaosher@nsn.com Mobile: 99 27 10 19 1 UNIK4230: Mobile Communications Cells and Cellular Traffic- I Date: 07.03.2013 2 UNIK4230: Mobile Communications

More information

Sensitivity of optimum downtilt angle for geographical traffic load distribution in WCDMA

Sensitivity of optimum downtilt angle for geographical traffic load distribution in WCDMA Sensitivity of optimum downtilt angle for geographical traffic load distribution in WCDMA Jarno Niemelä, Tero Isotalo, Jakub Borkowski, and Jukka Lempiäinen Institute of Communications Engineering, Tampere

More information

Wireless Communications Principles and Practice 2 nd Edition Prentice-Hall. By Theodore S. Rappaport

Wireless Communications Principles and Practice 2 nd Edition Prentice-Hall. By Theodore S. Rappaport Wireless Communications Principles and Practice 2 nd Edition Prentice-Hall By Theodore S. Rappaport Chapter 3 The Cellular Concept- System Design Fundamentals 3.1 Introduction January, 2004 Spring 2011

More information

Dynamic Frequency Hopping in Cellular Fixed Relay Networks

Dynamic Frequency Hopping in Cellular Fixed Relay Networks Dynamic Frequency Hopping in Cellular Fixed Relay Networks Omer Mubarek, Halim Yanikomeroglu Broadband Communications & Wireless Systems Centre Carleton University, Ottawa, Canada {mubarek, halim}@sce.carleton.ca

More information

Cellular Concept. Cell structure

Cellular Concept. Cell structure Cellular Concept Dr Yousef Dama Faculty of Engineering and Information Technology An-Najah National University 2014-2015 Mobile communications Lecture Notes, prepared by Dr Yousef Dama, An-Najah National

More information

Modelling Small Cell Deployments within a Macrocell

Modelling Small Cell Deployments within a Macrocell Modelling Small Cell Deployments within a Macrocell Professor William Webb MBA, PhD, DSc, DTech, FREng, FIET, FIEEE 1 Abstract Small cells, or microcells, are often seen as a way to substantially enhance

More information

Distributed Power Control in Cellular and Wireless Networks - A Comparative Study

Distributed Power Control in Cellular and Wireless Networks - A Comparative Study Distributed Power Control in Cellular and Wireless Networks - A Comparative Study Vijay Raman, ECE, UIUC 1 Why power control? Interference in communication systems restrains system capacity In cellular

More information

HETEROGENEOUS LINK ASYMMETRY IN TDD MODE CELLULAR SYSTEMS

HETEROGENEOUS LINK ASYMMETRY IN TDD MODE CELLULAR SYSTEMS HETEROGENEOUS LINK ASYMMETRY IN TDD MODE CELLULAR SYSTEMS Magnus Lindström Radio Communication Systems Department of Signals, Sensors and Systems Royal Institute of Technology (KTH) SE- 44, STOCKHOLM,

More information

Study of Handover Techniques for 4G Network MIMO Systems

Study of Handover Techniques for 4G Network MIMO Systems Study of Handover Techniques for 4G Network MIMO Systems 1 Jian-Sing Wang, 2 Jeng-Shin Sheu 1 National Yunlin University of Science and Technology Department of CSIE E-mail: M10017008@yuntech.edu.tw 2

More information

UNIK4230: Mobile Communications. Abul Kaosher

UNIK4230: Mobile Communications. Abul Kaosher UNIK4230: Mobile Communications Abul Kaosher abul.kaosher@nsn.com Cells and Cellular Traffic Cells and Cellular Traffic Introduction Hexagonal Cell Geometry Co-Channel Interference (CCI) CCI Reduction

More information

UNIK4230: Mobile Communications Spring 2013

UNIK4230: Mobile Communications Spring 2013 UNIK4230: Mobile Communications Spring 2013 Abul Kaosher abul.kaosher@nsn.com Mobile: 99 27 10 19 1 UNIK4230: Mobile Communications Cells and Cellular Traffic- I Date: 07.03.2013 2 UNIK4230: Mobile Communications

More information

LECTURE 12. Deployment and Traffic Engineering

LECTURE 12. Deployment and Traffic Engineering 1 LECTURE 12 Deployment and Traffic Engineering Cellular Concept 2 Proposed by Bell Labs in 1971 Geographic Service divided into smaller cells Neighboring cells do not use same set of frequencies to prevent

More information

A Glimps at Cellular Mobile Radio Communications. Dr. Erhan A. İnce

A Glimps at Cellular Mobile Radio Communications. Dr. Erhan A. İnce A Glimps at Cellular Mobile Radio Communications Dr. Erhan A. İnce 28.03.2012 CELLULAR Cellular refers to communications systems that divide a geographic region into sections, called cells. The purpose

More information

Mobile & Wireless Networking. Lecture 4: Cellular Concepts & Dealing with Mobility. [Reader, Part 3 & 4]

Mobile & Wireless Networking. Lecture 4: Cellular Concepts & Dealing with Mobility. [Reader, Part 3 & 4] 192620010 Mobile & Wireless Networking Lecture 4: Cellular Concepts & Dealing with Mobility [Reader, Part 3 & 4] Geert Heijenk Outline of Lecture 4 Cellular Concepts q Introduction q Cell layout q Interference

More information

Introduction to Wireless and Mobile Networking. Hung-Yu Wei g National Taiwan University

Introduction to Wireless and Mobile Networking. Hung-Yu Wei g National Taiwan University Introduction to Wireless and Mobile Networking Lecture 3: Multiplexing, Multiple Access, and Frequency Reuse Hung-Yu Wei g National Taiwan University Multiplexing/Multiple Access Multiplexing Multiplexing

More information

Ray-Tracing Urban Picocell 3D Propagation Statistics for LTE Heterogeneous Networks

Ray-Tracing Urban Picocell 3D Propagation Statistics for LTE Heterogeneous Networks 13 7th European Conference on Antennas and Propagation (EuCAP) Ray-Tracing Urban Picocell 3D Propagation Statistics for LTE Heterogeneous Networks Evangelos Mellios, Geoffrey S. Hilton and Andrew R. Nix

More information

Redline Communications Inc. Combining Fixed and Mobile WiMAX Networks Supporting the Advanced Communication Services of Tomorrow.

Redline Communications Inc. Combining Fixed and Mobile WiMAX Networks Supporting the Advanced Communication Services of Tomorrow. Redline Communications Inc. Combining Fixed and Mobile WiMAX Networks Supporting the Advanced Communication Services of Tomorrow WiMAX Whitepaper Author: Frank Rayal, Redline Communications Inc. Redline

More information

ETI2511-WIRELESS COMMUNICATION II HANDOUT I 1.0 PRINCIPLES OF CELLULAR COMMUNICATION

ETI2511-WIRELESS COMMUNICATION II HANDOUT I 1.0 PRINCIPLES OF CELLULAR COMMUNICATION ETI2511-WIRELESS COMMUNICATION II HANDOUT I 1.0 PRINCIPLES OF CELLULAR COMMUNICATION 1.0 Introduction The substitution of a single high power Base Transmitter Stations (BTS) by several low BTSs to support

More information

Dynamic Grouping and Frequency Reuse Scheme for Dense Small Cell Network

Dynamic Grouping and Frequency Reuse Scheme for Dense Small Cell Network GRD Journals Global Research and Development Journal for Engineering International Conference on Innovations in Engineering and Technology (ICIET) - 2016 July 2016 e-issn: 2455-5703 Dynamic Grouping and

More information

Cross-layer Network Design for Quality of Services in Wireless Local Area Networks: Optimal Access Point Placement and Frequency Channel Assignment

Cross-layer Network Design for Quality of Services in Wireless Local Area Networks: Optimal Access Point Placement and Frequency Channel Assignment Cross-layer Network Design for Quality of Services in Wireless Local Area Networks: Optimal Access Point Placement and Frequency Channel Assignment Chutima Prommak and Boriboon Deeka Abstract This paper

More information

Reti di Telecomunicazione. Channels and Multiplexing

Reti di Telecomunicazione. Channels and Multiplexing Reti di Telecomunicazione Channels and Multiplexing Point-to-point Channels They are permanent connections between a sender and a receiver The receiver can be designed and optimized based on the (only)

More information

White Paper. 850 MHz & 900 MHz Co-Existence. 850 MHz Out-Of-Band Emissions Problem xxxx-xxxreva

White Paper. 850 MHz & 900 MHz Co-Existence. 850 MHz Out-Of-Band Emissions Problem xxxx-xxxreva White Paper 850 MHz & 900 MHz Co-Existence 850 MHz Out-Of-Band Emissions Problem 2016 xxxx-xxxreva White Paper 850 MHz & 900 MHz Coexistence - 850 MHz Out-of-Band Emissions Problem Table of Contents Introduction

More information

Comparison of Receive Signal Level Measurement Techniques in GSM Cellular Networks

Comparison of Receive Signal Level Measurement Techniques in GSM Cellular Networks Comparison of Receive Signal Level Measurement Techniques in GSM Cellular Networks Nenad Mijatovic *, Ivica Kostanic * and Sergey Dickey + * Florida Institute of Technology, Melbourne, FL, USA nmijatov@fit.edu,

More information

Dynamic Allocation of Downlink and Uplink Resource for Broadband Services in Fixed Wireless Networks. Kin K. Leung and Arty Srivastava

Dynamic Allocation of Downlink and Uplink Resource for Broadband Services in Fixed Wireless Networks. Kin K. Leung and Arty Srivastava Dynamic Allocation of Downlink and Uplink Resource for Broadband Services in Fixed Wireless Networks Kin K. Leung and Arty Srivastava AT&T Labs, Room 4-120 100 Schulz Drive Red Bank, NJ 07701-7033 Phone:

More information

Channel selection for IEEE based wireless LANs using 2.4 GHz band

Channel selection for IEEE based wireless LANs using 2.4 GHz band Channel selection for IEEE 802.11 based wireless LANs using 2.4 GHz band Jihoon Choi 1a),KyubumLee 1, Sae Rom Lee 1, and Jay (Jongtae) Ihm 2 1 School of Electronics, Telecommunication, and Computer Engineering,

More information

ADJACENT BAND COMPATIBILITY OF TETRA AND TETRAPOL IN THE MHZ FREQUENCY RANGE, AN ANALYSIS COMPLETED USING A MONTE CARLO BASED SIMULATION TOOL

ADJACENT BAND COMPATIBILITY OF TETRA AND TETRAPOL IN THE MHZ FREQUENCY RANGE, AN ANALYSIS COMPLETED USING A MONTE CARLO BASED SIMULATION TOOL European Radiocommunications Committee (ERC) within the European Conference of Postal and Telecommunications Administrations (CEPT) ADJACENT BAND COMPATIBILITY OF TETRA AND TETRAPOL IN THE 380-400 MHZ

More information

A High-Capacity Wireless Network by Quad-Sector Cell and Interleaved Channel Assignment

A High-Capacity Wireless Network by Quad-Sector Cell and Interleaved Channel Assignment 472 IEEE JOURNAL ON SELECTED AREAS IN COMMUNICATIONS, VOL. 18, NO. 3, MARCH 2000 A High-Capacity Wireless Network by Quad-Sector Cell and Interleaved Channel Assignment Li-Chun Wang, Member, IEEE, and

More information

GSM FREQUENCY PLANNING

GSM FREQUENCY PLANNING GSM FREQUENCY PLANNING PROJECT NUMBER: PRJ070 BY NAME: MUTONGA JACKSON WAMBUA REG NO.: F17/2098/2004 SUPERVISOR: DR. CYRUS WEKESA EXAMINER: DR. MAURICE MANG OLI Introduction GSM is a cellular mobile network

More information

REVISITING RADIO PROPAGATION PREDICTIONS FOR A PROPOSED CELLULAR SYSTEM IN BERHAMPUR CITY

REVISITING RADIO PROPAGATION PREDICTIONS FOR A PROPOSED CELLULAR SYSTEM IN BERHAMPUR CITY REVISITING RADIO PROPAGATION PREDICTIONS FOR A PROPOSED CELLULAR SYSTEM IN BERHAMPUR CITY Rowdra Ghatak, T.S.Ravi Kanth* and Subrat K.Dash* National Institute of Science and Technology Palur Hills, Berhampur,

More information

Submission on Proposed Methodology for Engineering Licenses in Managed Spectrum Parks

Submission on Proposed Methodology for Engineering Licenses in Managed Spectrum Parks Submission on Proposed Methodology and Rules for Engineering Licenses in Managed Spectrum Parks Introduction General This is a submission on the discussion paper entitled proposed methodology and rules

More information

An Overlaid Hybrid-Duplex OFDMA System with Partial Frequency Reuse

An Overlaid Hybrid-Duplex OFDMA System with Partial Frequency Reuse An Overlaid Hybrid-Duplex OFDMA System with Partial Frequency Reuse Jung Min Park, Young Jin Sang, Young Ju Hwang, Kwang Soon Kim and Seong-Lyun Kim School of Electrical and Electronic Engineering Yonsei

More information

System Performance of Cooperative Massive MIMO Downlink 5G Cellular Systems

System Performance of Cooperative Massive MIMO Downlink 5G Cellular Systems IEEE WAMICON 2016 April 11-13, 2016 Clearwater Beach, FL System Performance of Massive MIMO Downlink 5G Cellular Systems Chao He and Richard D. Gitlin Department of Electrical Engineering University of

More information

Unit 4 - Cellular System Design, Capacity, Handoff, and Outage

Unit 4 - Cellular System Design, Capacity, Handoff, and Outage Unit 4 - Cellular System Design, Capacity, Handoff, and Outage Course outline How to access the portal Assignment. Overview of Cellular Evolution and Wireless Technologies Wireless Propagation and Cellular

More information

Electromagnetic Interference Compatibility for Mobile Communication System. Abstract

Electromagnetic Interference Compatibility for Mobile Communication System. Abstract Commission E: Electromagnetic Noise and Interference (e) Scientific basis of noise and interference control Electromagnetic Interference Compatibility for Mobile Communication System M.K Raina, Kirti Gupta

More information

Chapter 1 Introduction to Mobile Computing (16 M)

Chapter 1 Introduction to Mobile Computing (16 M) Chapter 1 Introduction to Mobile Computing (16 M) 1.1 Introduction to Mobile Computing- Mobile Computing Functions, Mobile Computing Devices, Mobile Computing Architecture, Evolution of Wireless Technology.

More information

SEN366 (SEN374) (Introduction to) Computer Networks

SEN366 (SEN374) (Introduction to) Computer Networks SEN366 (SEN374) (Introduction to) Computer Networks Prof. Dr. Hasan Hüseyin BALIK (8 th Week) Cellular Wireless Network 8.Outline Principles of Cellular Networks Cellular Network Generations LTE-Advanced

More information

WiMAX Network Design and Optimization Using Multi-hop Relay Stations

WiMAX Network Design and Optimization Using Multi-hop Relay Stations WiMAX Network Design and Optimization Using Multi-hop Relay Stations CHUTIMA PROMMAK, CHITAPONG WECHTAISON Department of Telecommunication Engineering Suranaree University of Technology Nakhon Ratchasima,

More information

EEG473 Mobile Communications Module 2 : Week # (6) The Cellular Concept System Design Fundamentals

EEG473 Mobile Communications Module 2 : Week # (6) The Cellular Concept System Design Fundamentals EEG473 Mobile Communications Module 2 : Week # (6) The Cellular Concept System Design Fundamentals Interference and System Capacity Interference is the major limiting factor in the performance of cellular

More information

Performances Analysis of Different Channel Allocation Schemes for Personal Mobile Communication Networks

Performances Analysis of Different Channel Allocation Schemes for Personal Mobile Communication Networks Performances Analysis of Different Channel Allocation Schemes for Personal Mobile Communication Networks 1 GABRIEL SIRBU, ION BOGDAN 1 Electrical and Electronics Engineering Dept., Telecommunications Dept.

More information

MRN -4 Frequency Reuse

MRN -4 Frequency Reuse Politecnico di Milano Facoltà di Ingegneria dell Informazione MRN -4 Frequency Reuse Mobile Radio Networks Prof. Antonio Capone Assignment of channels to cells o The multiple access technique in cellular

More information

Chutima Prommak and Boriboon Deeka. Proceedings of the World Congress on Engineering 2007 Vol II WCE 2007, July 2-4, 2007, London, U.K.

Chutima Prommak and Boriboon Deeka. Proceedings of the World Congress on Engineering 2007 Vol II WCE 2007, July 2-4, 2007, London, U.K. Network Design for Quality of Services in Wireless Local Area Networks: a Cross-layer Approach for Optimal Access Point Placement and Frequency Channel Assignment Chutima Prommak and Boriboon Deeka ESS

More information

Implementation Aspects of RF-repeaters in Cellular Networks

Implementation Aspects of RF-repeaters in Cellular Networks Implementation Aspects of F-repeaters in Cellular Networks Panu Lähdekorpi, Tero Isotalo, Sultan Usama Khan, and Jukka Lempiäinen Department of Communications Engineering Tampere University of Technology

More information

Cellular Wireless Networks and GSM Architecture. S.M. Riazul Islam, PhD

Cellular Wireless Networks and GSM Architecture. S.M. Riazul Islam, PhD Cellular Wireless Networks and GSM Architecture S.M. Riazul Islam, PhD Desirable Features More Capacity Less Power Larger Coverage Cellular Network Organization Multiple low power transmitters 100w or

More information

Radio Resource Allocation Scheme for Device-to-Device Communication in Cellular Networks Using Fractional Frequency Reuse

Radio Resource Allocation Scheme for Device-to-Device Communication in Cellular Networks Using Fractional Frequency Reuse 2011 17th Asia-Pacific Conference on Communications (APCC) 2nd 5th October 2011 Sutera Harbour Resort, Kota Kinabalu, Sabah, Malaysia Radio Resource Allocation Scheme for Device-to-Device Communication

More information

Downtilt: How to set it

Downtilt: How to set it : How to set it 2017 KP Performance Antennas, Inc. All Rights Reserved. Page 1 As operators expand their fixed-wireless networks from a single to multiple base stations, mitigating interference between

More information

Data and Computer Communications. Tenth Edition by William Stallings

Data and Computer Communications. Tenth Edition by William Stallings Data and Computer Communications Tenth Edition by William Stallings Data and Computer Communications, Tenth Edition by William Stallings, (c) Pearson Education - 2013 CHAPTER 10 Cellular Wireless Network

More information

Combination of Dynamic-TDD and Static-TDD Based on Adaptive Power Control

Combination of Dynamic-TDD and Static-TDD Based on Adaptive Power Control Combination of Dynamic-TDD and Static-TDD Based on Adaptive Power Control Howon Lee and Dong-Ho Cho Department of Electrical Engineering and Computer Science Korea Advanced Institute of Science and Technology

More information

Dimensioning Cellular WiMAX Part II: Multihop Networks

Dimensioning Cellular WiMAX Part II: Multihop Networks Dimensioning Cellular WiMAX Part II: Multihop Networks Christian Hoymann, Michael Dittrich, Stephan Goebbels, Bernhard Walke Chair of Communication Networks (ComNets), RWTH Aachen University, Faculty,

More information

Cochannel Interference Reduction in Dynamic-TDD Fixed Wireless Applications, Using Time Slot Allocation Algorithms

Cochannel Interference Reduction in Dynamic-TDD Fixed Wireless Applications, Using Time Slot Allocation Algorithms IEEE TRANSACTIONS ON COMMUNICATIONS, VOL. 50, NO. 10, OCTOBER 2002 1627 Cochannel Interference Reduction in Dynamic-TDD Fixed Wireless Applications, Using Time Slot Allocation Algorithms Wuncheol Jeong

More information

Dynamic Subcarrier, Bit and Power Allocation in OFDMA-Based Relay Networks

Dynamic Subcarrier, Bit and Power Allocation in OFDMA-Based Relay Networks Dynamic Subcarrier, Bit and Power Allocation in OFDMA-Based Relay Networs Christian Müller*, Anja Klein*, Fran Wegner**, Martin Kuipers**, Bernhard Raaf** *Communications Engineering Lab, Technische Universität

More information

Downlink Erlang Capacity of Cellular OFDMA

Downlink Erlang Capacity of Cellular OFDMA Downlink Erlang Capacity of Cellular OFDMA Gauri Joshi, Harshad Maral, Abhay Karandikar Department of Electrical Engineering Indian Institute of Technology Bombay Powai, Mumbai, India 400076. Email: gaurijoshi@iitb.ac.in,

More information

3G Network Planning Study with Monte- Carlo Simulation

3G Network Planning Study with Monte- Carlo Simulation 3G Network lanning Study with Monte- Carlo Nuno Daniel Cardoso ortugal elecom S.A. 1 2 Overview n Objectives. n scenario description. n Load impact on coverage probability. n Noise rise limit. n Handover

More information

Channel Alternation And Rotation For Tri-sectored Directional Antenna Cellular Systems

Channel Alternation And Rotation For Tri-sectored Directional Antenna Cellular Systems Channel Alternation And Rotation For Tri-sectored Directional Antenna Cellular Systems Vincent A. Nguyen, Peng-Jun Wan, aiid Ophir Frieder Computer Science Department Illinois Institute of Technology Chicago,

More information

JOURNAL OF INTERNATIONAL ACADEMIC RESEARCH FOR MULTIDISCIPLINARY Impact Factor 1.393, ISSN: , Volume 2, Issue 3, April 2014

JOURNAL OF INTERNATIONAL ACADEMIC RESEARCH FOR MULTIDISCIPLINARY Impact Factor 1.393, ISSN: , Volume 2, Issue 3, April 2014 COMPARISON OF SINR AND DATA RATE OVER REUSE FACTORS USING FRACTIONAL FREQUENCY REUSE IN HEXAGONAL CELL STRUCTURE RAHUL KUMAR SHARMA* ASHISH DEWANGAN** *Asst. Professor, Dept. of Electronics and Technology,

More information

Advanced Communication Systems -Wireless Communication Technology

Advanced Communication Systems -Wireless Communication Technology Advanced Communication Systems -Wireless Communication Technology Dr. Junwei Lu The School of Microelectronic Engineering Faculty of Engineering and Information Technology Outline Introduction to Wireless

More information

Francis J. Smith CTO Finesse Wireless Inc.

Francis J. Smith CTO Finesse Wireless Inc. Impact of the Interference from Intermodulation Products on the Load Factor and Capacity of Cellular CDMA2000 and WCDMA Systems & Mitigation with Interference Suppression White Paper Francis J. Smith CTO

More information

UNIT-III. 1. Define cochannel interference. How is it measured at the mobile unit and cell site?

UNIT-III. 1. Define cochannel interference. How is it measured at the mobile unit and cell site? UNIT-III 1. Define cochannel interference. How is it measured at the mobile unit and cell site? Answer: Cochannel Interference: The frequency-re method is useful for increasing the efficiency of spectrum

More information

Technical Annex. This criterion corresponds to the aggregate interference from a co-primary allocation for month.

Technical Annex. This criterion corresponds to the aggregate interference from a co-primary allocation for month. RKF Engineering Solutions, LLC 1229 19 th St. NW, Washington, DC 20036 Phone 202.463.1567 Fax 202.463.0344 www.rkf-eng.com 1. Protection of In-band FSS Earth Stations Technical Annex 1.1 In-band Interference

More information

Fractional Frequency Reuse Schemes and Performance Evaluation for OFDMA Multi-hop Cellular Networks

Fractional Frequency Reuse Schemes and Performance Evaluation for OFDMA Multi-hop Cellular Networks Fractional Frequency Reuse Schemes and Performance Evaluation for OFDMA Multi-hop Cellular Networks Yue Zhao, Xuming Fang, Xiaopeng Hu, Zhengguang Zhao, Yan Long Provincial Key Lab of Information Coding

More information

Performance Evaluation of Uplink Closed Loop Power Control for LTE System

Performance Evaluation of Uplink Closed Loop Power Control for LTE System Performance Evaluation of Uplink Closed Loop Power Control for LTE System Bilal Muhammad and Abbas Mohammed Department of Signal Processing, School of Engineering Blekinge Institute of Technology, Ronneby,

More information

Access Methods and Spectral Efficiency

Access Methods and Spectral Efficiency Access Methods and Spectral Efficiency Yousef Dama An-Najah National University Mobile Communications Access methods SDMA/FDMA/TDMA SDMA (Space Division Multiple Access) segment space into sectors, use

More information

CHANNEL ASSIGNMENT IN AN IEEE WLAN BASED ON SIGNAL-TO- INTERFERENCE RATIO

CHANNEL ASSIGNMENT IN AN IEEE WLAN BASED ON SIGNAL-TO- INTERFERENCE RATIO CHANNEL ASSIGNMENT IN AN IEEE 802.11 WLAN BASED ON SIGNAL-TO- INTERFERENCE RATIO Mohamad Haidar #1, Rabindra Ghimire #1, Hussain Al-Rizzo #1, Robert Akl #2, Yupo Chan #1 #1 Department of Applied Science,

More information

ON DOWNLINK INTERCELL INTERFERENCE IN A CELLULAR SYSTEM

ON DOWNLINK INTERCELL INTERFERENCE IN A CELLULAR SYSTEM ON DOWNLINK INTERCELL INTERFERENCE IN A CELLULAR SYSTEM Mario Castañeda, Michel T Ivrlač, Josef A Nossek Technische Universität München Ingo Viering Nomor Research GmbH Axel Klein Nokia Siemens Networks

More information

Figure 1.1:- Representation of a transmitter s Cell

Figure 1.1:- Representation of a transmitter s Cell Volume 4, Issue 2, February 2014 ISSN: 2277 128X International Journal of Advanced Research in Computer Science and Software Engineering Research Paper Available online at: www.ijarcsse.com Study on Improving

More information

Beamforming and Binary Power Based Resource Allocation Strategies for Cognitive Radio Networks

Beamforming and Binary Power Based Resource Allocation Strategies for Cognitive Radio Networks 1 Beamforming and Binary Power Based Resource Allocation Strategies for Cognitive Radio Networks UWB Walter project Workshop, ETSI October 6th 2009, Sophia Antipolis A. Hayar EURÉCOM Institute, Mobile

More information

THE EFFECT of multipath fading in wireless systems can

THE EFFECT of multipath fading in wireless systems can IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY, VOL. 47, NO. 1, FEBRUARY 1998 119 The Diversity Gain of Transmit Diversity in Wireless Systems with Rayleigh Fading Jack H. Winters, Fellow, IEEE Abstract In

More information

Providing Extreme Mobile Broadband Using Higher Frequency Bands, Beamforming, and Carrier Aggregation

Providing Extreme Mobile Broadband Using Higher Frequency Bands, Beamforming, and Carrier Aggregation Providing Extreme Mobile Broadband Using Higher Frequency Bands, Beamforming, and Carrier Aggregation Fredrik Athley, Sibel Tombaz, Eliane Semaan, Claes Tidestav, and Anders Furuskär Ericsson Research,

More information

White Paper 850 MHz & 900 MHz Co-Existence 900 MHz Receiver Blocking Problem

White Paper 850 MHz & 900 MHz Co-Existence 900 MHz Receiver Blocking Problem White Paper 850 MHz & 900 MHz Co-Existence 900 MHz Receiver Blocking Problem Table of Contents Introduction and Background 3 Assumptions 3 Receiver Blocking Problem 6 Conclusion 8 2 1. Introduction and

More information