CA2308902A1 - Power control and cell site location technique for cdma systems with hierarchical architecture - Google Patents

Power control and cell site location technique for cdma systems with hierarchical architecture Download PDF

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Publication number
CA2308902A1
CA2308902A1 CA002308902A CA2308902A CA2308902A1 CA 2308902 A1 CA2308902 A1 CA 2308902A1 CA 002308902 A CA002308902 A CA 002308902A CA 2308902 A CA2308902 A CA 2308902A CA 2308902 A1 CA2308902 A1 CA 2308902A1
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Canada
Prior art keywords
base
users
cell
received power
equivalent
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA002308902A
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French (fr)
Other versions
CA2308902C (en
Inventor
Richard Dennis Gitlin
Howard C. Huang
Rajeev Krishnamoorthy
Reinaldo A. Valenzuela
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Nokia of America Corp
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Lucent Technologies Inc
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Filing date
Publication date
Application filed by Lucent Technologies Inc filed Critical Lucent Technologies Inc
Publication of CA2308902A1 publication Critical patent/CA2308902A1/en
Application granted granted Critical
Publication of CA2308902C publication Critical patent/CA2308902C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/30—TPC using constraints in the total amount of available transmission power
    • H04W52/34—TPC management, i.e. sharing limited amount of power among users or channels or data types, e.g. cell loading
    • H04W52/343—TPC management, i.e. sharing limited amount of power among users or channels or data types, e.g. cell loading taking into account loading or congestion level
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
    • H04W16/02—Resource partitioning among network components, e.g. reuse partitioning
    • H04W16/06—Hybrid resource partitioning, e.g. channel borrowing
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/30—TPC using constraints in the total amount of available transmission power
    • H04W52/34—TPC management, i.e. sharing limited amount of power among users or channels or data types, e.g. cell loading
    • H04W52/346—TPC management, i.e. sharing limited amount of power among users or channels or data types, e.g. cell loading distributing total power among users or channels
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
    • H04W16/24—Cell structures
    • H04W16/32—Hierarchical cell structures

Abstract

Multiple microcell base stations are located within a macrocell having a single macrocell base station in an hierarchical architecture, and microcell users (µ-users) and macrocell users (M-users) communicate respectively with the µ-base and the M-base using the same frequency band, by appropriately (a) selecting the ratio of the radius r of each µ cell and the average distance d from the M-base (r and d are measured by the "radio distance", which includes the effects of shadowing), and (b) controlling the power level with which uplink (mobile to base) and downlink (base to mobile) messages are communicated. Typically, µ-cell size and location are chosen such that d/r > 10. With respect to uplink communications, the transmit powers of the µ -users in a µ-cell are controlled so that the total received power at the nearest M-base is equivalent to the received power from C M-users, where C
is usually set to unity. As a result, the M-cell basically loses C users worth of capacity, but the total number of users is increased by virtue of the additional µ-users. With respect to downlink communications, as long as the microbase and the macrobase are coordinated systems, the µ-base transmit power is controlled so that at the point of handoff between a µ-base and M-base, the received power at a user from the two bases is equivalent, and the received power at the bases from this user is also equivalent. With this arrangement, the µ-base transmit power is increased as r grows and d decreases in order for this balance to occur. Where the M-base and µ-base have no knowledge of each other and handoffs are not allowed between the two base types, a family of I/Q short codes which are quasi-orthogonal to the existing short (pilot) codes are generated, and these codes are used to distinguish between the M-base and µ-base signals.
CA002308902A 1999-05-28 2000-05-19 Power control and cell site location technique for cdma systems with hierarchical architecture Expired - Fee Related CA2308902C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US09/322,941 US6438379B1 (en) 1999-05-28 1999-05-28 Power control and cell site location technique for CDMA systems with hierarchical architecture
US09/322,941 1999-05-28

Publications (2)

Publication Number Publication Date
CA2308902A1 true CA2308902A1 (en) 2000-11-28
CA2308902C CA2308902C (en) 2003-12-02

Family

ID=23257127

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002308902A Expired - Fee Related CA2308902C (en) 1999-05-28 2000-05-19 Power control and cell site location technique for cdma systems with hierarchical architecture

Country Status (2)

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US (1) US6438379B1 (en)
CA (1) CA2308902C (en)

Cited By (1)

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CN103858459A (en) * 2011-10-13 2014-06-11 诺基亚公司 Interference coordination between macrocell and small cell

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AU5191299A (en) * 1999-08-12 2001-03-13 Elad Barkan Add-on base station for cellular network expansion
US7027769B1 (en) 2000-03-31 2006-04-11 The Directv Group, Inc. GEO stationary communications system with minimal delay
US6756937B1 (en) 2000-06-06 2004-06-29 The Directv Group, Inc. Stratospheric platforms based mobile communications architecture
US6829479B1 (en) * 2000-07-14 2004-12-07 The Directv Group. Inc. Fixed wireless back haul for mobile communications using stratospheric platforms
US6868269B1 (en) 2000-08-28 2005-03-15 The Directv Group, Inc. Integrating coverage areas of multiple transponder platforms
US7257418B1 (en) 2000-08-31 2007-08-14 The Directv Group, Inc. Rapid user acquisition by a ground-based beamformer
US6763242B1 (en) 2000-09-14 2004-07-13 The Directv Group, Inc. Resource assignment system and method for determining the same
WO2003036815A1 (en) * 2001-10-22 2003-05-01 Nokia Corporation Pilot channel power autotuning
GB2390953A (en) * 2002-07-15 2004-01-21 King S College London Controlling a micro cell transmit power to maintain quality of service for nearby devices served by an overlapping macro cell
WO2006010958A2 (en) 2004-07-30 2006-02-02 Andrew Richardson Power control in a local network node (lnn)
EP1779543B1 (en) * 2004-07-30 2012-04-25 Andrew Richardson Signal transmission method from a local network node
US7529218B2 (en) * 2004-08-25 2009-05-05 Cisco Technology, Inc. High density WLAN system
FI20055032A0 (en) * 2005-01-25 2005-01-25 Nokia Corp Method for reducing interference of an indoor cell in a cellular wireless telecommunication system
US7885315B2 (en) * 2006-01-12 2011-02-08 Nokia Corporation Pilot scrambling in communications systems
US7603124B2 (en) * 2006-03-09 2009-10-13 Alcatel-Lucent Usa Inc. Automatically configuring a neighbor set for a base station
US20070213067A1 (en) 2006-03-09 2007-09-13 Patrick Li Wireless communication handoffs within a macrocell
US8108003B2 (en) * 2006-03-09 2012-01-31 Alcatel Lucent Controlling base station router device definition codes
US8369859B2 (en) * 2006-05-22 2013-02-05 Alcatel Lucent Controlling transmit power of picocell base units
US20080117866A1 (en) 2006-11-22 2008-05-22 Holger Claussen Wireless communications using overlay network devices within coverage areas of underlay network devices
US9629096B2 (en) * 2006-12-15 2017-04-18 Alcatel-Lucent Usa Inc. Controlling uplink power for picocell communications within a macrocell
GB2447439B (en) 2007-02-02 2012-01-25 Ubiquisys Ltd Access point power control
KR101336253B1 (en) * 2007-06-29 2013-12-06 삼성전자주식회사 Appratus and method for power contol in wireless communication terminal
US8050629B2 (en) * 2007-10-22 2011-11-01 Motorola Mobility, Inc. Optimizing power settings in a communication system to mitigate interference
GB0800767D0 (en) * 2008-01-16 2008-02-27 Nec Corp A method for controlling access to a mobile communications network
US8280387B2 (en) * 2008-05-22 2012-10-02 Ntt Docomo, Inc. Femtocell channel assignment and power control for improved femtocell coverage and efficient cell search
CN101827386B (en) * 2009-03-04 2015-07-08 华为技术有限公司 Method, system and related device for adjusting transmitting power
GB2471681B (en) * 2009-07-07 2011-11-02 Ubiquisys Ltd Interference mitigation in a femtocell access point
JP5565082B2 (en) 2009-07-31 2014-08-06 ソニー株式会社 Transmission power determination method, communication apparatus, and program
JP5531767B2 (en) 2009-07-31 2014-06-25 ソニー株式会社 Transmission power control method, communication apparatus, and program
JP5429036B2 (en) 2009-08-06 2014-02-26 ソニー株式会社 COMMUNICATION DEVICE, TRANSMISSION POWER CONTROL METHOD, AND PROGRAM
GB2472597B (en) 2009-08-11 2012-05-16 Ubiquisys Ltd Power setting
WO2011042043A1 (en) * 2009-10-05 2011-04-14 Nokia Siemens Networks Oy Interference control
US20120231833A1 (en) * 2009-10-29 2012-09-13 Troels Emil Kolding Transmission Power Control

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US5924036A (en) * 1996-02-13 1999-07-13 Airnet Communications Corp. Code-division multiple-access cellular system employing overlaid cells
US5822698A (en) * 1996-08-08 1998-10-13 Northern Telecom Limited Microcell frequency planning

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103858459A (en) * 2011-10-13 2014-06-11 诺基亚公司 Interference coordination between macrocell and small cell

Also Published As

Publication number Publication date
CA2308902C (en) 2003-12-02
US6438379B1 (en) 2002-08-20

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