Source: http://www.google.com/patents/US7881666?dq=2040248
Timestamp: 2014-10-02 13:30:29
Document Index: 52338372

Matched Legal Cases: ['Application No. 2005239608', 'Application No. 2005239608', 'Application No. 200580013498', 'Application No. 200580013498', 'Application No. 5883', 'Application No. 5883', 'Application No. 5883', 'Application No. 5883', 'Application No. 10', 'Application No. 10', 'Application No. 0409473', 'Application No. 0409473']

Patent US7881666 - Ad-hoc communication network and method - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign in<nobr>Advanced Patent Search</nobr>PatentsA method of controlling location information of subscribers (210, 212, 222) in a wireless, ad-hoc communications network (200). The network (200) comprises a plurality of nodes (204, 216, 226), wherein at least portion of said nodes are provided with Home Location Registers (HLRs) (206, 218, 228) and...http://www.google.com/patents/US7881666?utm_source=gb-gplus-sharePatent US7881666 - Ad-hoc communication network and methodAdvanced Patent SearchPublication numberUS7881666 B2Publication typeGrantApplication numberUS 11/539,206Publication dateFeb 1, 2011Filing dateOct 6, 2006Priority dateApr 28, 2004Also published asUS20070087759Publication number11539206, 539206, US 7881666 B2, US 7881666B2, US-B2-7881666, US7881666 B2, US7881666B2InventorsNanna Svane Theisen, David J. Chater-Lea, Svend H. Frandsen, Steen PetersenOriginal AssigneeMotorola, Inc.Export CitationBiBTeX, EndNote, RefManPatent Citations (17), Non-Patent Citations (14), Classifications (10), Legal Events (2) External Links: USPTO, USPTO Assignment, EspacenetAd-hoc communication network and methodUS 7881666 B2Abstract A method of controlling location information of subscribers (210, 212, 222) in a wireless, ad-hoc communications network (200). The network (200) comprises a plurality of nodes (204, 216, 226), wherein at least portion of said nodes are provided with Home Location Registers (HLRs) (206, 218, 228) and each of said nodes (204, 216, 226) has a Visitor Location Register (VLR) (208, 220, 230). When an operation of a first node (216) is to be reconfigured at least a part of records from a first HLR (218) assigned to said first node (216) are transferred to at least one of the other nodes (226) of the network (200).
FIELD OF THE INVENTION The invention relates to a system and a method of controlling location information of subscribers and in particular, but not exclusively, controlling location information of subscribers in a TETRA (TErrestrial Trunked RAdio) cellular communication system.
BACKGROUND OF THE INVENTION In a cellular communication system (like for example the Global System for Mobile communication (GSM) and TETRA (TErrestrial Trunked RAdio)), geographical region is divided into a number of cells each of which is served by a base station. One base station, also termed as Base Transceiver Station (BTS) with a switching infrastructure is referred as a node of the network. The switching infrastructure supporting BTS may be shared with other BTSs. The system infrastructure in a TETRA system is generally referred to as a switching and management infrastructure (SwMI), which substantially contains all of the communication elements apart from the MSs. This includes base transceiver stations (BTSs) connected to a conventional public-switched telephone network (PSTN) through base station controllers (BSCs) and mobile switching centres (MSCs). In geographical terms reference to a node is a reference to an area served by one BTS, and in network terms reference to a node is a reference to one BTS and supporting it infrastructure. A remote unit referred also as subscriber or mobile station (MS) or communication unit is served via a radio communication link by the base station of the cell within which the remote unit is operating.
SUMMARY OF THE INVENTION According to a first aspect of the present invention there is provided a method of controlling location information of subscribers in a wireless, ad-hoc communications network. The network comprises a plurality of nodes, wherein at least portion of said nodes are provided with Home Location Registers (HLRs) and each of said nodes has a Visitor Location Register
The HLR is not static in its location, it can be moved around in the ad-hoc network as the network develops�thus ensuring that the network will always have continued access to the HLR configuration data for all users, even if the node holding their HLR is temporarily taken down or moved.
The location-track-keeping and the update of the HLR in an ad-hoc network is done automatically by the network when there is a change in network topology, thereby reducing the operating cost and making it more flexible in use. It allows for easy implementation of a wireless system which is dynamic in nature and with better performance, while still ensuring service to the users. The solution provides some aspects of a self-healing network. BRIEF DESCRIPTION OF THE DRAWINGS The present invention will be understood and appreciated more fully from the following detailed description taken in conjunction with the drawings in which:
DESCRIPTION OF AN EMBODIMENT OF THE INVENTION The term �Home Location Register� (HLR) herein below refers to a database containing configuration information and location information related to all subscribers home to a particular node or nodes. One HLR may cover more than one node.
The term�Visitor Location Register� (VLR) herein below refers to a database containing information on subscribers operating in a particular node and keeps pointers to respective HLRs (i.e. HLRs that are home for the subscribers listed in the VLR). Every node in the network has assigned a separate VLR.
The term �look-up table� herein below refers to a table which is copied into every node and divides the individual and group address space into blocks of numbers, then allocates each block to one of the nodes, i.e. identifies the correct HLR for each block of identities. As every node has the same table, if a subscriber (or group member) registers at any node, that node can immediately know which node contains the HLR for that subscriber (or group).
performance�it is not necessary to access a remote HLR;
resilience�if the link to the remote HLR goes down, there is still full service available;
gateway access�the HLR may be used to specify local gateway access, etc.
In one embodiment the nodes 204, 216, 226 of the communications network 200 has a look-up table which lists all the subscribers operating in the network 200 and identifies the correct HLR for each of the subscribers. In consequence with reconfiguration of the network 200 and changing the structure of HLRs by transferring records of the first HLR 218 to the second node 226 it is necessary to update said look-up table with the new subscriber�HLR distribution.
Patent CitationsCited PatentFiling datePublication dateApplicantTitleUS5752188 *Dec 23, 1994May 12, 1998Telefonaktiebolaget Lm EricssonUnstructured supplementary service data from a home location register to an external nodeUS5881235 *Mar 7, 1996Mar 9, 1999Ericsson Inc.Remotely programming a mobile terminal with a home location register addressUS6154646Sep 10, 1998Nov 28, 2000Telefonaktiebolaget L M EricssonSystem and method for real-time interactive selection of call treatment in a radio telecommunications networkUS6427076 *Sep 30, 1998Jul 30, 2002Telefonaktiebolaget Lm Ericsson (Publ)Method and system for manipulating subscriber dataUS6850760 *Mar 14, 2001Feb 1, 2005Telefonaktiebolaget Lm EricssonMethod and devices for improved location updating in a mobile communication systemUS7013139 *Apr 2, 1999Mar 14, 2006Nortel Networks LimitedHLR data migrationUS7027417 *Feb 23, 2000Apr 11, 2006Nokia CorporationManagement of packet switched connections in a mobile communications networkUS7031700 *Nov 19, 2003Apr 18, 2006Sprint Spectrum L.P.Method and system for location-based group conference initiationUS7502361 *Jan 15, 2003Mar 10, 2009Alcatel-Lucent Usa Inc.Subnetwork layer for a multimedia mobile networkUS20020039907 *Jan 31, 2001Apr 4, 2002Mckenna Daniel B.Communique system for combined cellular and wireline communication networksUS20020058494 *Nov 14, 2001May 16, 2002Timonen Juha T.Method and system of offering wireless telecommunication services in a visited telecommunication networkUS20040029601 *Oct 26, 2001Feb 12, 2004O'neill Alan WTelecommunications routingDE4417779C1May 20, 1994Dec 7, 1995Siemens AgMobilfunksystemEP1251710A1Mar 22, 2002Oct 23, 2002Lucent Technologies Inc.Method and apparatus for migrating subscribers between networksWO1994023506A1Mar 21, 1994Oct 13, 1994Ericsson Telefon Ab L MRestoration of a home location register in a mobile radio systemWO1999027734A1Oct 30, 1998Jun 3, 1999Ericsson Telefon Ab L MMigration of subscriber data between home location registers of a telecommunications systemWO2000024216A2Oct 5, 1999Apr 27, 2000Ericsson Telefon Ab L MDynamic hlr redundancy in a radio telecommunications network* Cited by examinerNon-Patent CitationsReference1Australian Application No. 2005239608-Office Action mailed Sep. 24, 2007-1 page.2Australian Application No. 2005239608�Office Action mailed Sep. 24, 2007�1 page.3China Patent Office-Application No. 200580013498.4-First Office Action mailed Sep. 25, 2009-3 pages..4China Patent Office�Application No. 200580013498.4�First Office Action mailed Sep. 25, 2009�3 pages..5EPC Search Report mailed Jan. 4, 2010-3 pages.6EPC Search Report mailed Jan. 4, 2010�3 pages.7India Patent Office Application No. 5883/DELNP/2006-First Examination Report mailed Mar. 4, 2009-2 pages.8India Patent Office Application No. 5883/DELNP/2006�First Examination Report mailed Mar. 4, 2009�2 pages.9India Patent Office Application No. 5883/DELNP/2006-Patent Certificate-Granted Jan. 27, 2010-1 page.10India Patent Office Application No. 5883/DELNP/2006�Patent Certificate�Granted Jan. 27, 2010�1 page.11Korean Application No. 10-2006-7022544-Notice of Patent Grant-1 page.12Korean Application No. 10-2006-7022544�Notice of Patent Grant�1 page.13United Kingdom-GB Application No. 0409473.6-Certificate of Grant No. GB2413731-Nov. 2008-30 pages.14United Kingdom�GB Application No. 0409473.6�Certificate of Grant No. GB2413731�Nov. 2008�30 pages.Classifications U.S. Classification455/41.2, 455/436, 370/338, 455/432.1, 455/433, 455/432.3International ClassificationH04W24/02, H04B7/00Cooperative ClassificationH04W24/02European ClassificationH04W24/02Legal EventsDateCodeEventDescriptionApr 6, 2011ASAssignmentFree format text: CHANGE OF NAME;ASSIGNOR:MOTOROLA, INC;REEL/FRAME:026081/0001Effective date: 20110104Owner name: MOTOROLA SOLUTIONS, INC., ILLINOISOct 6, 2006ASAssignmentOwner name: MOTOROLA, INC., ILLINOISFree format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:THEISEN, NANNA SVANE;CHATER-LEA, DAVID J.;FRANDSEN, SVEND H.;AND OTHERS;REEL/FRAME:018363/0682Effective date: 20060927RotateOriginal ImageGoogle Home - Sitemap - USPTO Bulk Downloads - Privacy Policy - Terms of Service - About Google Patents - Send FeedbackData provided by IFI CLAIMS Patent Services©2012 Google