Zoeken Afbeeldingen Maps Play YouTube Nieuws Gmail Drive Meer »
Inloggen
Gebruikers van een schermlezer: klik op deze link voor de toegankelijkheidsmodus. De toegankelijkheidsmodus beschikt over dezelfde essentiŰle functies, maar werkt beter met je lezer.

Patenten

  1. Geavanceerd zoeken naar patenten
PublicatienummerUS20090098885 A1
PublicatietypeAanvraag
AanvraagnummerUS 12/248,705
Publicatiedatum16 april 2009
Aanvraagdatum9 okt 2008
Prioriteitsdatum12 okt 2007
Ook gepubliceerd alsCA2702224A1, CA2702262A1, CA2809102A1, CN101855929A, CN101855929B, CN101855931A, CN103220619A, CN103228028A, CN103428633A, CN103476095A, CN103476095B, CN105656593A, EP2210443A2, EP2210443B1, EP2220895A2, EP2273825A2, EP2273825A3, EP2273833A2, EP2273833A3, US9137745, US20090098873, WO2009049155A2, WO2009049155A3, WO2009049197A2, WO2009049197A3
Publicatienummer12248705, 248705, US 2009/0098885 A1, US 2009/098885 A1, US 20090098885 A1, US 20090098885A1, US 2009098885 A1, US 2009098885A1, US-A1-20090098885, US-A1-2009098885, US2009/0098885A1, US2009/098885A1, US20090098885 A1, US20090098885A1, US2009098885 A1, US2009098885A1
UitvindersAleksandar M. Gogic, Rajarshi Gupta
Oorspronkelijke patenteigenaarQualcomm Incorporated
Citatie exporterenBiBTeX, EndNote, RefMan
Externe links: USPTO, USPTO-toewijzing, Espacenet
System and method for storing information to locate a femto cell
US 20090098885 A1
Samenvatting
A system, method and computer product for augmenting a user's equipment (UE) database with information measured by a femto cell, the method comprising: (a) performing RF measurements by a femto cell; (b) connecting the UE to the femto cell; (c) downloading the RF measurements taken by the femto cell into the UE custom database; (d) maintaining a central database of femto cell measurements, to be used for updating custom UE databases; (e) comparing current RF measurements taken by the UE with the femto cell own RF measurements to estimate proximity to the femto cell.
Afbeeldingen(11)
Previous page
Next page
Claims(38)
1. A method for augmenting a user's equipment (UE) database, the method comprising:
performing radio frequency (RF) measurements by a femto cell to determine a location of the femto cell;
connecting the UE to the femto cell; and
downloading the RF measurements taken by the femto cell pertaining to the location of the femto cell into the UE database.
2. The method of claim 1, further comprising:
taking RF measurements by the UE; and
comparing current RF measurements taken by the UE with the femto cell's own RF measurements to estimate proximity to the femto cell.
3. The method of claim 1, wherein the location of the femto cell comprises of macro cell system parameters: within the area described by a base station (BS) set C, in which pilots exceed threshold EC/Io vector D, and have a mean pilot phase vector P within tolerance Q.
4. The method of claim 1, wherein the communication of the RF measurements between the femto cell and the UE uses an over-the-air protocol.
5. A user's equipment (UE) comprising:
a database of femto cells acquired by the UE, individualized for the UE and stored on the UE;
wherein a femto cell takes RF measurements, downloads these RF measurements into the UE's database when the UE is connected to the femto cell,
wherein the RF measurements pertaining to a location of the femto cell.
6. The user's equipment (UE) of claim 5, wherein the UE takes RF measurements and compares current RF measurements taken by the UE with the femto cell's own measurements to estimate proximity to the femto cell.
7. The user's equipment (UE) of claim 5, wherein the location of the femto cell comprises macro cell system parameters, within the area described by a base station (BS) set C, in which pilots exceed threshold EC/Io vector D, and have a mean pilot phase vector P within tolerance Q.
8. The user's equipment (UE) of claim 5, wherein the communication of the RF measurements between the femto cell and the UE uses a protocol.
9. A computer program product comprising:
a computer readable medium comprising:
code for causing at least one computer to perform RF measurements by a femto cell to determine a location of a femto cell;
code for causing at least one computer to connect the UE to the femto cell; and
code for causing at least one computer to download the RF measurements taken by the femto cell pertaining to the location of the femto cell into the UE database.
10. The computer program product of claim 9, wherein said computer readable medium further comprises:
code for causing at least one computer to take RF measurements by the UE; and
code for causing at least one computer to compare current RF measurements taken by the UE with the femto cell's own RF measurements to estimate proximity to the femto cell.
11. The computer program product of claim 9, wherein the location of the femto cell comprises of macro cell system parameters: within the area described by a base station (BS) set C, in which pilots exceed threshold EC/Io vector D, and have a mean pilot phase vector P within tolerance Q.
12. The computer program product of claim 9, wherein the communication of the RF measurements between the femto cell and the UE uses an over-the-air protocol.
13. An apparatus for augmenting a user's equipment (UE) database, comprising:
means for performing RF measurements by a femto cell to determine a location of the femto cell;
means for connecting the UE to the femto cell; and
means for downloading the RF measurements taken by the femto cell pertaining to the location of the femto cell into the UE database.
14. The apparatus of claim 13, further comprising:
means for taking RF measurements by the UE; and
means for comparing current RF measurements taken by the UE with the femto cell's own RF measurements to estimate proximity to the femto cell.
15. The apparatus of claim 13, wherein the location of the femto cell comprises of macro cell system parameters: within the area described by a base station (BS) set C, in which pilots exceed threshold EC/Io vector D, and have a mean pilot phase vector P within tolerance Q.
16. The apparatus of claim 13, wherein the communication of the RF measurements between the femto cell and the UE uses an over-the-air protocol.
17. A method for augmenting a user's equipment (UE) database for locating femto cells, the method comprising:
performing RF measurements by a plurality of UEs, wherein RF measurements determine a location of a femto cell based on the UE's location relative to at least one macro cell;
sending the location information from the UEs to a back-end server;
processing at the back-end server the locations to average location for the femto cell;
connecting a UE to the back-end server; and
downloading the average location for the femto cell into the UE's database.
18. The method of claim 17, wherein the communication of the locations between the back-end server and the UE uses an application running over the existing internet protocol used by the femto cell.
19. The method of claim 17, wherein the location of the femto cell comprises macro cell system parameters, within the area described by a base station (BS) set C, in which pilots exceed threshold EC/Io vector D, and have a mean pilot phase vector P within tolerance Q.
20. A system for augmenting a user's equipment (UE) database for locating femto cells, the system comprising:
a plurality of user's equipment (UEs');
a database of femto cells acquired by the UE, individualized for the UE and stored on the UE;
a back-end server comprising part of a macro cell mobile network;
wherein the UEs perform RF measurements, wherein RF measurements determine a location of a femto cell based on UE's location relative to at least one macro cell;
wherein the UEs send the location information to the back-end server;
wherein the back-end server processes the locations to average location for a femto cell;
wherein the UE connects to the back-end server; and
wherein the back-end server downloads the average location for the femto cell into the UE's database.
21. The system of claim 20, wherein the communication of the locations between the back-end server and the UE comprises an application running over the existing internet protocol used by the femto cell.
22. The system of claim 20, wherein the location of the femto cell comprises macro cell system parameters: within the area described by a base station (BS) set C, in which pilots exceed threshold EC/Io vector D, and have a mean pilot phase vector P within tolerance Q.
23. A computer program product comprising:
a computer readable medium comprising
code for causing at least one computer to perform RF measurements by an UE;
code for causing at least one computer to perform RF measurements by a plurality of UE, wherein RF measurements determine a location of a femto cell based on UE's location relative to at least one macro cell;
code for causing at least one computer to send the location information from the UEs to a back-end server;
code for causing at least one computer to process at the back-end server the locations to average location for a femto cell;
code for causing at least one computer to connect the UE to the back-end server; and
code for causing at least one computer to download the average location for the femto cell into the UE's database.
24. The computer program product of claim 23, wherein the communication of the locations between the back-end server and the UE uses an application running over the existing internet protocol used by the femto cell.
25. The computer program product of claim 23, wherein the location of the femto cell comprises macro cell system parameters, within the area described by a base station (BS) set C, in which pilots exceed threshold EC/Io vector D, and have a mean pilot phase vector P within tolerance Q.
26. An apparatus for augmenting a user's equipment (UE) database for locating femto cells, the method comprising:
means for performing RF measurements by a plurality of UEs, wherein RF measurements determine a location of a femto cell based on the UE's location relative to at least one macro cell;
means for sending the location information from the UEs to a back-end server;
means for processing at the back-end server the locations to average location for the femto cell;
means for connecting a UE to the back-end server; and
means for downloading the average location for the femto cell into the UE's database.
27. The apparatus of claim 26, wherein the communication of the locations between the back-end server and the UE uses an application running over the existing internet protocol used by the femto cell.
28. The apparatus of claim 26, wherein the location of the femto cell comprises macro cell system parameters, within the area described by a base station (BS) set C, in which pilots exceed threshold EC/Io vector D, and have a mean pilot phase vector P within tolerance Q.
29. A method for augmenting a user's equipment (UE) database, the method comprising:
storing by the UE RF measurements to neighboring macro cells at the time when the UE receives a strongest signal from a femto cell, wherein the strongest signal corresponds to a closest location of the femto cell;
performing by the UE RF measurements pertaining to a macro cell phase offset; and
downloading into the UE's database the information pertaining to changes in macro cell environment.
30. The method of claim 29, further comprising re-writing the entry into the UE's database every time the UE samples a stronger signal from the femto cell.
31. The method of claim 29, wherein the RF measurements at the femto cell are used to trigger error conditions at the UE, if there is a wide divergence in the measurements reported by an associated UE and gets erased from the UE's database.
32. A system for augmenting a user's equipment (UE) database, the system comprising:
a user's equipment (UE);
a database of neighboring macro cells acquired by the UE while visiting a neighborhood and stored in the UE's database;
wherein the UE stores the RF measurements to neighboring macro cells at the time when the UE receives the strongest signal from a femto cell,
wherein the strongest signal corresponds to the closest location of the femto cell;
wherein the UE performs the RF measurements pertaining to a macro cell phase offsets; and
downloads into the UE's database the information pertaining to changes in macro cell environment.
33. The system of claim 32, wherein the UE re-writes the entry into the UE's database time every time the UE samples a stronger signal from the femto cell.
34. The system of claim 32, wherein the RF measurements at the femto cell are used to trigger error conditions at the UE, if there is a wide divergence in the measurements reported by an associated UE and gets erased from the UE's database.
35. A computer-program product, comprising:
a computer-readable medium comprising
code for causing at least one computer to store, by the UE, the RF measurements to neighboring macro cells at the time when the UE receives the strongest signal from a femto cell, wherein the strongest signal corresponds to the closest location of the femto cell;
code for causing at least one computer to perform, by the UE, RF measurements pertaining to a macro cell phase offset; and
code for causing at least one computer to download into the UE's database the information pertaining to changes in macro cell environment.
36. An apparatus for augmenting a user's equipment (UE) database, comprising:
means for storing by the UE RF measurements to neighboring macro cells at the time when the UE receives a strongest signal from a femto cell, wherein the strongest signal corresponds to a closest location of the femto cell;
means for performing by the UE RF measurements pertaining to a macro cell phase offset; and
means for downloading into the UE's database the information pertaining to changes in macro cell environment.
37. The apparatus of claim 36, further comprising means for re-writing the entry into the UE's database every time the UE samples a stronger signal from the femto cell.
38. The apparatus of claim 36, wherein the RF measurements at the femto cell are used to trigger error conditions at the UE, if there is a wide divergence in the measurements reported by an associated UE and gets erased from the UE's database.
Beschrijving
    BACKGROUND
  • [0001]
    1. Field
  • [0002]
    The present application relates generally to wireless communications, and more specifically to method and system for storing information to locate a femto cell.
  • [0003]
    2. Background
  • [0004]
    Wireless communication systems are widely deployed to provide various types of communication (e.g., voice, data, multimedia services, etc.) to multiple users. As the demand for high-rate and multimedia data services rapidly grows, there lies a challenge to implement efficient and robust communication systems with enhanced performance.
  • [0005]
    In recent years, users have started to replace fixed line communications with mobile communications and have increasingly demanded great voice quality, reliable service, and low prices.
  • [0006]
    In addition to mobile phone networks currently in place, a new class of small base stations has emerged, which may be installed in a user's home and provide indoor wireless coverage to mobile units using existing broadband Internet connections. Such personal miniature base stations are generally known as access point base stations, or, alternatively, Home Node B (HNB), or Femto cells. Typically, such miniature base stations are connected to the Internet and the mobile operator's network via DSL router or cable modem or other backhaul technologies.
  • [0007]
    One of the issues with mobile stations and femto cells is how to find a femto cell when it is operating on a macro-cellular network. The mobile station may be on a frequency different than one used by the femto cell. Alternatively, the femto cell may reuse one of several available carrier frequencies. If the mobile is not on that very frequency, it would miss the femto cell, and continue to operate on the macro cell, although it is within the coverage of the femto cell. Additionally, even if there is a way to find a femto cell, mobile may not be authorized to access it (access may be restricted). The problem can be further complicated by the fact that new femto cells are put in operation all the time.
  • [0008]
    Currently proposed solutions use pilot beacons to signal on other frequencies the presence of the femto cell on the frequency used by femtos. This approach has a weakness because it adds to interference on the other frequencies. Other proposals include constant periodic search for femto cells, which can hurt battery life. Accordingly, there is a need in the art for mobile devices to be able to determine where to search for a femto cell.
  • SUMMARY
  • [0009]
    The preferred embodiment relates to as a system and a method for storing information to locate a femto cell that substantially eliminates one or several disadvantages of the related art.
  • [0010]
    In one aspect of the preferred embodiment there is a system, method and computer product for augmenting a user's equipment (UE) database with information measured by a femto cell, the method comprising: (a) performing RF measurements by a femto cell to determine a location of the femto cell; (b) connecting the UE to the femto cell; (c) downloading the RF measurements taken by the femto cell pertaining to the location of the femto cell into the UE database.
  • [0011]
    The method further comprising: (a) taking RF measurements by the UE; (b) comparing current RF measurements taken by the UE with the femto cell own RF measurements to estimate proximity to the femto cell.
  • [0012]
    Obviously, this requires a protocol to communicate this information between the femto cell and the UE. A simple alternative to a new communication protocol would be for the UE to store the RF measurements to neighboring macro cell at the time when it receives the strongest signal from the associated femto cell.
  • [0013]
    In other aspects of the preferred embodiment there is a system, method and computer product for augmenting a user's equipment (UE) database with information processed at a back-end server based on a multiple UE reports from the multiple UEs for locating femto cells, the back-end server is part of a macro cell network, the method comprising: (a) performing RF measurements by a plurality of UE, wherein RF measurements determine a location of a femto cell based on the UE's location relative to at least one macro cell; (b) sending the location information to the back-end server; (c) processing at the back-end server the locations to average location for the femto cell; (d) connecting the UE to the back-end server; (e) downloading the average location for the femto cell into the UE's database.
  • [0014]
    In one embodiment, it does not require an over-the-air protocol to communicate this information between the back-end server and the UE. For this embodiment, an application is used, running over the existing internet protocols (e.g., TCP/IP) used normally by the femto cell.
  • [0015]
    In other aspects of the preferred embodiment there is a system, method and computer product for augmenting a user's equipment (UE) database with information pertaining to changes in macro environment, the method comprising: (a) storing by the UE RF measurements to neighboring macro cells at the time when the UE receives the strongest signal from a femto cell; (b) performing by the UE RF measurements pertaining to a macro cell phase off; (c) downloading into the UE database the information pertaining to changes in macro cell environment.
  • [0016]
    The information about previously stored macro cells may remain in the UE database depending on the strength of the pilots.
  • [0017]
    Additional features and advantages of the invention will be set forth in the description that follows, and in part will be apparent from the description, or may be learned by practice of the invention. The advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
  • [0018]
    It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are intended to provide further explanation of the invention as claimed.
  • BRIEF DESCRIPTION OF THE DRAWINGS
  • [0019]
    FIG. 1 is a exemplary wireless communication system;
  • [0020]
    FIG. 2 is a an exemplary communication system to enable deployment of access point base stations within a network environment;
  • [0021]
    FIG. 3 illustrates a method augmenting a user's equipment (UE) database with information measured by a femto cell.
  • [0022]
    FIG. 4 illustrates refinement of autonomous and customized discovery of femto cells.
  • [0023]
    FIG. 5 illustrates a pilot phase planning chart.
  • [0024]
    FIG. 6 illustrates a system used for augmenting a user's equipment (UE) database with information processed at a back-end server based on reports from multiple UEs.
  • [0025]
    FIG. 7A is a method for augmenting a user's equipment (UE) database with information processed at a back-end server based on reports from multiple UEs.
  • [0026]
    FIG. 7B illustrates a simplified block diagram of several sample aspects of communication components.
  • [0027]
    FIG. 8 is an alternate method for augmenting a user's equipment (UE) database.
  • [0028]
    FIG. 9 depicts an example block diagram of a system 800 in accordance with additional aspects described herein.
  • DETAILED DESCRIPTION
  • [0029]
    The word “exemplary” is used herein to mean “serving as an example, instance, or illustration.” Any embodiment described herein as “exemplary” is not necessarily to be construed as preferred or advantageous over other embodiments. The techniques described herein may be used for various wireless communication networks such as Code Division Multiple Access (CDMA) networks, Time Division Multiple Access (TDMA) networks, Frequency Division Multiple Access (FDMA) networks, Orthogonal FDMA (OFDMA) networks, Single-Carrier FDMA (SC-FDMA) networks, etc. The terms “networks” and “systems” are often used interchangeably. A CDMA network may implement a radio technology such as Universal Terrestrial Radio Access (UTRA), cdma2000, etc. UTRA includes Wideband-CDMA (W-CDMA) and Low Chip Rate (LCR). cdma2000 covers IS-2000, IS-95 and IS-856 standards. A TDMA network may implement a radio technology such as Global System for Mobile Communications (GSM). An OFDMA network may implement a radio technology such as Evolved UTRA (E-UTRA), IEEE 802.11, IEEE 802.16, IEEE 802.20, Flash-OFDM«, etc. UTRA, E-UTRA, and GSM are part of Universal Mobile Telecommunication System (UMTS). Long Term Evolution (LTE) is an upcoming release of UMTS that uses E-UTRA. UTRA, E-UTRA, GSM, UMTS and LTE are described in documents from an organization named “3rd Generation Partnership Project” (3GPP). cdma2000 is described in documents from an organization named “3rd Generation Partnership Project 2” (3GPP2). These various radio technologies and standards are known in the art.
  • [0030]
    In the description herein, a node that provides coverage over a relatively large area may be referred to as a macro node while a node that provides coverage over a relatively small area (e.g., a residence) may be referred to as a femto node. It should be appreciated that the teachings herein may be applicable to nodes associated with other types of coverage areas. For example, a pico node may provide coverage over an area that is smaller than a macro area and larger than a femto area (e.g., coverage within a commercial building). In various applications, other terminology may be used to reference a macro node, a femto node, or other access point-type nodes. For example, a macro node may be configured or referred to as an access node, base station, access point, eNodeB, macro cell, and so on. Also, a femto node may be configured or referred to as a Home NodeB, Home eNodeB, access point base station, femto cell, and so on. In some implementations, a node may be associated with (e.g., divided into) one or more cells or sectors. A cell or sector associated with a macro node, a femto node, or a pico node may be referred to as a macro cell, a femto cell, or a pico cell, respectively. A simplified example of how femto nodes may be deployed in a network will now be described with reference to FIGS. 1 and 2.
  • [0031]
    FIG. 1 illustrates an exemplary wireless communication system 100 configured to support a number of users, in which various disclosed embodiments and aspects may be implemented. As shown in FIG. 1, by way of example, system 100 provides communication for multiple cells 102 such as, for example, macro cells 102 a-102 g, with each cell being serviced by a corresponding access point (AP) or points 104, such as, for example, APs 104 a-104 g. Each macro cell may be further divided into one or more sectors (not shown). As further shown in FIG. 1, various access terminal (AT) devices 106, including ATs 106 a-1061, also known interchangeably as user equipment (UE), or as mobile stations (MS), or as terminal devices, may be dispersed at various locations throughout the system. Each AT 106 may communicate with one or more APs 104 on a forward link (FL) and/or a reverse link (RL) at a given moment, depending upon whether the AT is active and whether it is in soft handoff, for example. The wireless communication system 100 may provide service over a large geographic region. For example, macro cells 102 a-102 g may cover only a few blocks within a neighborhood or several square miles in a rural environment.
  • [0032]
    FIG. 2 illustrates an exemplary communication system to enable deployment of femto nodes, also known as femto cells (access point base stations) within a network environment. As shown in FIG. 2, the system 200 includes multiple femto nodes, or, in the alternative, femto cells, access point base stations, Home Node B (HNB) units such as, for example, HNB 210, 215, each being installed in a corresponding relatively small coverage network environment, such as, for example, in one or more sites 230, and such as, for example, being configured to serve associated user equipment 220. Each HNB 210 may be coupled to and further configured to communicate via a wide area network, such as the Internet 240, and to any node on the Internet, including a macro mobile operator core network 250 (also referred to as a “core network”). As shown, there are at least two communication paths between a terminal device 220 and the macro mobile operator core network 250, namely a path including macro cell access, and a path including the Internet 240.
  • [0033]
    Although embodiments described herein use 3GPP terminology, it is to be understood that the embodiments may be applied to 3GPP (Re199, Re15, Re16, Re17) technology, as well as 3GPP2 (1xRTT, 1xEV-DO Re10, RevA, RevB) technology, WiMax and other known and related technologies. In such embodiments described herein, the owner of the HNB 210 and the HNB 215 subscribes to mobile service, such as, for example, a 3G mobile service, offered through the mobile operator core network 250, and the UE 220 is capable to operate both in macro cellular environment and in residential small scale network environment. Thus, the HNB 210 and the HNB 215 are backward compatible with any existing UE 220.
  • [0034]
    Furthermore, in addition to the macro cell mobile network 250, the UE 220 can be served by a limited number of HNBs 210, e.g. a HNB 210 located within the user residence 230. For example the UE 220 may be served by the HNB 210, while it does not have access to HNB 215.
  • [0035]
    One of the issues with UEs and HNBs or femto cells is how to find a femto cell 210 when it is operating on a macro-cellular network 250. The UE 220 may be operating on a frequency different than the one used by the femto cell 210. In the course of searching procedures, where the UE 220 evaluates a neighbor list from the macro cells, it will not find the femto cell 210. Femto cells may use one of several available carrier frequencies. If the UE 220 is not operating on that very frequency, it would miss the femto cell 210, and continue to operate on the macro cell, although it is within coverage of the femto cell 210. Additionally, even if there is a way to find a femto cell 215, the UE 220 may not be authorized to access it (access may be restricted). The problem can be further complicated by the fact that new femto cells are put in operation all the time. The key advantages of the invention include: improved battery performance largely autonomous operation and automatic provisioning of the UEs, without requiring network downloads.
  • [0036]
    According to embodiments described in detail below, the UE 220 acquires (by learning or otherwise) a database of HNBs or femto cells 210 individualized for that UE 220. The database is stored on the UE 220, and may include for each femto cell 210 the following information: —Carrier frequency—Location (latitude/longitude (LAT/LON), or an alternative)—List of CDMA Pilots and phase offsets in vicinity of the Hot Spot, with EC/Io above a given threshold—Date femto access was last used/acquired by this access terminal or UE 220—Other identification information, such as System ID for the femto cell, Network ID for the femto cell, and Radio Technology used by the femto cell.
  • [0037]
    In one embodiment, each entry of the database describes a femto cell location in a non-orthogonal coordinate system comprised of macro pilots visible at that femto location (with qualifying minimum EC/Io), the phase delay of each pilot, and allowed deviation around that nominal phase delay. When the database is already available in the UE 220, it can be used to reduce femto searching, (i.e., conduct femto search only if there is a match in the database). The UE 220 on a frequency other than FF conducts search on FF only when there is a database match. In one embodiment, the database elements include macro pilot PN offsets, which are all visible by the UE 220 on whatever carrier it is monitoring in the idle state. These PN offsets are accessible to the UE in the course of routine operation in idle state, and the UE does not have to do anything different until there is a database match. Then, the UE 220 starts scanning for the HNB or femto cell 210, which is on a different frequency. Operating this way will reduce battery drainage.
  • [0038]
    FIG. 3 illustrates a method augmenting a user's equipment (UE) database with information measured by a femto cell. The femto cell 210 will typically have a radio that receives the Macro channels, in order to facilitate various configuration objectives like synchronization, location, pilot PN planning, etc. Consequently, since the Femto 210 in addition to its forward link transmitter, also has a forward link receiver, it itself could measure its RF environment within neighboring Macro cells. Advanced antenna configurations have interference reduction. Furthermore, this measurement is likely to be quite accurate since the Femto 210 is stationary, and can average the measurements over a long period of time. The Femto 210 can spend a lot of time searching for pilots of neighboring macro cells, integrating CDMA signals from very weak pilots. The Femto 210 performs its own measurements in Step 302.
  • [0039]
    In Step 304, the UE 220 connects to the Femto 210 for the first time. The Femto 210 downloads its measurements or parameters to the UE database in Step 306 to determine location of the femto cell. When the next time the UE 220 approaches the Femto 210 as shown in Step 308, it can compare its current measurements with the Femto's own readings to estimate its proximity to the Femto 210 as shown in Step 310.
  • [0040]
    This has a further advantage that if the UE 220 approaches the Femto 210 again (for the third time) from a different direction than the second time as shown in Step 312, then the error in measurement will be minimized, if the comparison point is at the Femto 210 itself, which makes this system more robust.
  • [0041]
    FIG. 4 illustrates refinement of autonomous and customized discovery of femto cells. The location of a femto cell may be described by means of primitives comprised of macro system parameters: within the area described by base station (BS) set C, in which Pilots exceed threshold EC/Io vector D, and have phase P within tolerance Q. All these parameters may be measured with little or no change of CDMA procedure (idle or active state), hence they will have minimal cost in terms of battery life and/or network use, in contrast to e.g. A-GPS geo-location.
  • [0042]
    FIG. 5 illustrates pilot phase planning chart. The chart shows that femto cells can be very dense. MP0 through MP7 are PN Offsets for macro cells and fP1 and fP2 are phase offsets for femto cells. In the long-term, there may be as many femto PN Offsets as for macro cells. This can be achieved in a couple of ways: (1) decrement PILOT_INC, thus creating an odd-numbered PN Offsets for femto cells; and (2) re-program macro macro cellular network by re-assigning odd PN offsets to even ones.
  • [0043]
    For example, 2π/128*2i result in 64 macro PN Offsets (even numbered) and 2π/128*(2i+1) result in 64 femto PN Offsets (odd numbered PN Offsets). Initially, at low density of femtos, a subset of PN Offsets can be used for femtos (explicitly in neighbor list). By the time femto density gets high, new femto-aware MS will have been fielded and can deal with the entire set of femto PN offsets.
  • [0044]
    In one embodiment, an over-the-air protocol is required to communicate this information between the Femto 210 and the UE 220. A simple alternative to a new communication protocol would be for the UE 220 to store the RF measurements to neighboring macro cells at the time when it receives the strongest signal from the associated femto cell. Since the strongest signal is likely to correspond to the closest location, this minimizes the error in the UE's database entry. This entry may be re-written every time the UE samples a stronger signal from the Femto.
  • [0045]
    Finally, this measurement at the Femto cell 210 can be used to trigger some error conditions at an UE, if there is a wide divergence in the measurements reported by an associated UE, and those made at the Femto.
  • [0046]
    Another alternative to a new communication protocol is when the information is processed at a back-end server based on the multiple UE reports. FIG. 6 illustrates a system used for augmenting a user's equipment (UE) database with information processed at a back-end server based on a multiple UE reports. A plurality of the UEs' 220 performs RF measurements relative to a location of a femto cell. The back-end server 610 is a part of the micro cell mobile network 250. The UEs' 220 send the UEs' measurements pertaining to the location of the femto cell to the back-end sever 610. The back-end sever 610 processes these locations to average the location for the femto cell. The sever 610 downloads the processed average location for the femto cell into the database of the UE 220 by using an application on the UE 220 that communicates with the back-end server over the Internet. The server 610 stays connected to the Internet 240.
  • [0047]
    FIG. 7A is a flow diagram illustrating a method for augmenting a user's equipment (UE) database with information processed at a back-end server based on a UE report from multiple UEs' for locating a femto cells. The back-end server 610 is a part of the micro cell mobile network 250. In Step 702 a plurality of UEs' 220 perform RF measurements related to a location of a femto cell. In Step 704 the UEs' 220 send these measurements pertaining to the location of the femto cell to the back-end server 610. In Step 706 the server 610 processes these locations to average the location for the femto cell. In Step 708 connecting the UE 220 to the back-end server 610. In Step 709 the back-end server 610 downloads the average location for the femto cell into the UE 220 database.
  • [0048]
    In one embodiment, this does not require any new over-the-air protocol to communicate this information between the back-end server and the UE. For this embodiment, an application is used, running over the existing internet protocols (e.g., TCP/IP) used normally by the femto cell 210.
  • [0049]
    It should be appreciated that the teachings herein may be implemented in various types of communication devices. In some aspects, the teachings herein may be implemented in wireless devices that may be deployed in multiple access communication system that may simultaneously support communication for multiple wireless access terminals. Here, each terminal may communicate with one or more access points via transmissions on the forward and reverse links. The forward link (or downlink) refers to the communication link from the access points to the terminals, and the reverse link (or uplink) refers to the communication link from the terminals to the access points. This communication link may be established via a single-in-single-out system, a multiple-in-multiple-out (“MIMO”) system, or some other type of system.
  • [0050]
    A MIMO system employs multiple (NT) transmit antennas and multiple (NR) receive antennas for data transmission. A MIMO channel formed by the NT transmit and NR receive antennas may be decomposed into NS independent channels, which are also referred to as spatial channels, where NS≦min {NT, NR}. Each of the Ns independent channels corresponds to a dimension. The MIMO system may provide improved performance (e.g., higher throughput and/or greater reliability) if the additional dimensionalities created by the multiple transmit and receive antennas are utilized.
  • [0051]
    A MIMO system may support time division duplex (“TDD”) and frequency division duplex (“FDD”). In a TDD system, the forward and reverse link transmissions are on the same frequency region so that the reciprocity principle allows the estimation of the forward link channel from the reverse link channel. This enables the access point to extract transmit beam-forming gain on the forward link when multiple antennas are available at the access point.
  • [0052]
    The teachings herein may be incorporated into a node (e.g., a device) employing various components for communicating with at least one other node. FIG. 7B depicts several sample components that may be employed to facilitate communication between nodes. Specifically, FIG. 7B illustrates a wireless device 710 (e.g., an access point) and a wireless device 750 (e.g., an access terminal) of a MIMO system 700. At the device 710, traffic data for a number of data streams is provided from a data source 712 to a transmit (“TX”) data processor 714.
  • [0053]
    In some aspects, each data stream is transmitted over a respective transmit antenna. The TX data processor 714 formats, codes, and interleaves the traffic data for each data stream based on a particular coding scheme selected for that data stream to provide coded data.
  • [0054]
    The coded data for each data stream may be multiplexed with pilot data using OFDM techniques. The pilot data is typically a known data pattern that is processed in a known manner and may be used at the receiver system to estimate the channel response. The multiplexed pilot and coded data for each data stream is then modulated (i.e., symbol mapped) based on a particular modulation scheme (e.g., BPSK, QSPK, M-PSK, or M-QAM) selected for that data stream to provide modulation symbols. The data rate, coding, and modulation for each data stream may be determined by instructions performed by a processor 730. A data memory 732 may store program code, data, and other information used by the processor 730 or other components of the device 710.
  • [0055]
    The modulation symbols for all data streams are then provided to a TX MIMO processor 720, which may further process the modulation symbols (e.g., for OFDM). The TX MIMO processor 720 then provides NT modulation symbol streams to NT transceivers (“XCVR”) 722A through 722T. In some aspects, the TX MIMO processor 720 applies beam-forming weights to the symbols of the data streams and to the antenna from which the symbol is being transmitted.
  • [0056]
    Each transceiver 722 receives and processes a respective symbol stream to provide one or more analog signals, and further conditions (e.g., amplifies, filters, and upconverts) the analog signals to provide a modulated signal suitable for transmission over the MIMO channel. NT modulated signals from transceivers 722A through 722T are then transmitted from NT antennas 724A through 724T, respectively.
  • [0057]
    At the device 750, the transmitted modulated signals are received by NR antennas 752A through 752R and the received signal from each antenna 752 is provided to a respective transceiver (“XCVR”) 754A through 754R. Each transceiver 754 conditions (e.g., filters, amplifies, and downconverts) a respective received signal, digitizes the conditioned signal to provide samples, and further processes the samples to provide a corresponding “received” symbol stream.
  • [0058]
    A receive (“RX”) data processor 760 then receives and processes the NR received symbol streams from NR transceivers 754 based on a particular receiver processing technique to provide NT “detected” symbol streams. The RX data processor 760 then demodulates, deinterleaves, and decodes each detected symbol stream to recover the traffic data for the data stream. The processing by the RX data processor 760 is complementary to that performed by the TX MIMO processor 720 and the TX data processor 714 at the device 710.
  • [0059]
    A processor 770 periodically determines which pre-coding matrix to use (discussed below). The processor 770 formulates a reverse link message comprising a matrix index portion and a rank value portion. A data memory 772 may store program code, data, and other information used by the processor 770 or other components of the device 750.
  • [0060]
    The reverse link message may comprise various types of information regarding the communication link and/or the received data stream. The reverse link message is then processed by a TX data processor 738, which also receives traffic data for a number of data streams from a data source 736, modulated by a modulator 780, conditioned by the transceivers 754A through 754R, and transmitted back to the device 710.
  • [0061]
    At the device 710, the modulated signals from the device 750 are received by the antennas 724, conditioned by the transceivers 722, demodulated by a demodulator (“DEMOD”) 740, and processed by a RX data processor 742 to extract the reverse link message transmitted by the device 750. The processor 730 then determines which pre-coding matrix to use for determining the beam-forming weights then processes the extracted message.
  • [0062]
    The teachings herein may be incorporated into various types of communication systems and/or system components. In some aspects, the teachings herein may be employed in a multiple-access system capable of supporting communication with multiple users by sharing the available system resources (e.g., by specifying one or more of bandwidth, transmit power, coding, interleaving, and so on). For example, the teachings herein may be applied to any one or combinations of the following technologies: Code Division Multiple Access (“CDMA”) systems, Multiple-Carrier CDMA (“MCCDMA”), Wideband CDMA (“W-CDMA”), High-Speed Packet Access (“HSPA,” “HSPA+”) systems, Time Division Multiple Access (“TDMA”) systems, Frequency Division Multiple Access (“FDMA”) systems, Single-Carrier FDMA (“SC-FDMA”) systems, Orthogonal Frequency Division Multiple Access (“OFDMA”) systems, or other multiple access techniques. A wireless communication system employing the teachings herein may be designed to implement one or more standards, such as IS-95, cdma2000, IS-856, W-CDMA, TDSCDMA, and other standards. A CDMA network may implement a radio technology such as Universal Terrestrial Radio Access (“UTRA)”, cdma2000, or some other technology. UTRA includes W-CDMA and Low Chip Rate (“LCR”). The cdma2000 technology covers IS-2000, IS-95 and IS-856 standards. A TDMA network may implement a radio technology such as Global System for Mobile Communications (“GSM”). An OFDMA network may implement a radio technology such as Evolved UTRA (“E-UTRA”), IEEE 802.11, IEEE 802.16, IEEE 802.20, Flash-OFDM░, etc. UTRA, E-UTRA, and GSM are part of Universal Mobile Telecommunication System (“UMTS”). The teachings herein may be implemented in a 3GPP Long Term Evolution (“LTE”) system, an Ultra-Mobile Broadband (“UMB”) system, and other types of systems. LTE is a release of UMTS that uses E-UTRA. Although certain aspects of the disclosure may be described using 3GPP terminology, it is to be understood that the teachings herein may be applied to 3GPP (Re199, Re15, Re16, Re17) technology, as well as 3GPP2 (IxRTT, 1xEV-DO RelO, RevA, RevB) technology and other technologies.
  • [0063]
    The teachings herein may be incorporated into (e.g., implemented within or performed by) a variety of apparatuses (e.g., nodes). In some aspects, a node (e.g., a wireless node) implemented in accordance with the teachings herein may comprise an access point or an access terminal.
  • [0064]
    For example, an access terminal may comprise, be implemented as, or known as user equipment, a subscriber station, a subscriber unit, a mobile station, a mobile, a mobile node, a remote station, a remote terminal, a user terminal, a user agent, a user device, or some other terminology. In some implementations an access terminal may comprise a cellular telephone, a cordless telephone, a session initiation protocol (“SIP”) phone, a wireless local loop (“WLL”) station, a personal digital assistant (“PDA”), a handheld device having wireless connection capability, or some other suitable processing device connected to a wireless modem. Accordingly, one or more aspects taught herein may be incorporated into a phone (e.g., a cellular phone or smart phone), a computer (e.g., a laptop), a portable communication device, a portable computing device (e.g., a personal data assistant), an entertainment device (e.g., a music device, a video device, or a satellite radio), a global positioning system device, or any other suitable device that is configured to communicate via a wireless medium.
  • [0065]
    An access point may comprise, be implemented as, or known as a NodeB, an eNodeB, a radio network controller (“RNC”), a base station (“BS”), a radio base station (“RBS”), a base station controller (“BSC”), a base transceiver station (“BTS”), a transceiver function (“TF”), a radio transceiver, a radio router, a basic service set (“BSS”), an extended service set (“ESS”), or some other similar terminology.
  • [0066]
    In some aspects a node (e.g., an access point) may comprise an access node for a communication system. Such an access node may provide, for example, connectivity for or to a network (e.g., a wide area network such as the Internet or a cellular network) via a wired or wireless communication link to the network.
  • [0067]
    Accordingly, an access node may enable another node (e.g., an access terminal) to access a network or some other functionality. In addition, it should be appreciated that one or both of the nodes may be portable or, in some cases, relatively non-portable.
  • [0068]
    Also, it should be appreciated that a wireless node may be capable of transmitting and/or receiving information in a non-wireless manner (e.g., via a wired connection). Thus, a receiver and a transmitter as discussed herein may include appropriate communication interface components (e.g., electrical or optical interface components) to communicate via a non-wireless medium.
  • [0069]
    A wireless node may communicate via one or more wireless communication links that are based on or otherwise support any suitable wireless communication technology. For example, in some aspects a wireless node may associate with a network. In some aspects the network may comprise a local area network or a wide area network. A wireless device may support or otherwise use one or more of a variety of wireless communication technologies, protocols, or standards such as those discussed herein (e.g., CDMA, TDMA, OFDM, OFDMA, WiMAX, Wi-Fi, and so on). Similarly, a wireless node may support or otherwise use one or more of a variety of corresponding modulation or multiplexing schemes. A wireless node may thus include appropriate components (e.g., air interfaces) to establish and communicate via one or more wireless communication links using the above or other wireless communication technologies.
  • [0070]
    For example, a wireless node may comprise a wireless transceiver with associated transmitter and receiver components that may include various components (e.g., signal generators and signal processors) that facilitate communication over a wireless medium.
  • [0071]
    The embodiment below describes another method of augmenting a UE's data base. FIG. 8 illustrates a method of augmenting the UE 220 database based on changes in micro cell environment 250. In Step 802 the UE 220 stores a femto cell's RF measurements to neighboring macro cells at the time when the UE 220 receives the strongest signal. In Step 804 the UE 220 performs RF measurements pertaining to a macro cell phase offsets. In Step 806 the UE 220 data base gets downloaded with the information related to changes in macro cellular environment. The information in the UE 220 database gets updated every time the UE 220 samples a stronger signal from the femto cell. Finally, the RF measurements at the femto cell may be used to trigger an error conditions at the UE 220, if there is a wide divergence in the measurements reported by an associated UE, and those made the femto cell.
  • [0072]
    FIG. 9 depicts an example block diagram of a system 900 in accordance with additional aspects described herein. System 900 provides an apparatus that can facilitate locating a femto cell. Specifically, system 900 can include a plurality of modules or means, such as, for example, performing means 910, connecting means 920, downloading means 930, sending or transmitting means 940, processing means 950, and storing means 960, each connected to a communication link 905, and can communicate with other modules or means over communication link 905.
  • [0073]
    Those of skill in the art would understand that information and signals may be represented using any of a variety of different technologies and techniques. For example, data, instructions, commands, information, signals, bits, symbols, and chips that may be referenced throughout the above description may be represented by voltages, currents, electromagnetic waves, magnetic fields or particles, optical fields or particles, or any combination thereof.
  • [0074]
    Those of skill would further appreciate that the various illustrative logical blocks, modules, circuits, and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, computer software, or combinations of both. To clearly illustrate this interchangeability of hardware and software, various illustrative components, blocks, modules, circuits, and steps have been described above generally in terms of their functionality. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the overall system. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
  • [0075]
    The various illustrative logical blocks, modules, and circuits described in connection with the embodiments disclosed herein may be implemented or performed with a general purpose processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof designed to perform the functions described herein. A general purpose processor may be a microprocessor, but in the alternative, the processor may be any conventional processor, controller, microcontroller, or state machine. A processor may also be implemented as a combination of computing devices, e.g., a combination of a DSP and a microprocessor, a plurality of microprocessors, one or more microprocessors in conjunction with a DSP core, or any other such configuration.
  • [0076]
    The steps of a method or algorithm described in connection with the embodiments disclosed herein may be embodied directly in hardware, in a software module executed by a processor, or in a combination of the two. A software module may reside in RAM memory, flash memory, ROM memory, EPROM memory, EEPROM memory, registers, hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art. An exemplary storage medium is coupled to the processor such the processor can read information from, and write information to, the storage medium. In the alternative, the storage medium may be integral to the processor. The processor and the storage medium may reside in an ASIC. The ASIC may reside in a user terminal. In the alternative, the processor and the storage medium may reside as discrete components in a user terminal.
  • [0077]
    The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Patentcitaties
Geciteerd patent Aanvraagdatum Publicatiedatum Aanvrager Titel
US4707841 *21 aug 198417 nov 1987University Of Toronto, Innovations FoundationDigital data receiver for preamble free data transmission
US5093926 *29 sept 19893 maart 1992Motorola, Inc.Trunked communication system scanning method and apparatus
US5640677 *17 jan 199617 juni 1997Telefonaktiebolaget Lm EricssonBest server selection in layered cellular radio system
US5896573 *14 april 199720 april 1999Southern Methodist UniversityChannel assignment selection reducing call blocking and call cutoff in a cellular communication system
US5983097 *2 okt 19979 nov 1999Ntt Mobile Communications Network Inc.Mobile communication scheme for efficiently regulating service through micro-cell system in coordination with service through macro-cell system
US6031829 *25 sept 199629 feb 2000Alcatel CitBase transceiver station for cellular mobile radio system and system for synchronizing such base transceiver stations
US6167268 *16 feb 199926 dec 2000Motorola, Inc.Method and apparatus for controlling scanning of a subscriber unit
US6529491 *5 nov 19984 maart 2003Nortel Networks Ltd.Private/residential code division multiple access wireless communication system
US6539491 *8 nov 199925 maart 2003International Business Machines CorporationMethod and apparatus for implementing IEEE 1149.1 compliant boundary scan
US6590881 *4 dec 19988 juli 2003Qualcomm, IncorporatedMethod and apparatus for providing wireless communication system synchronization
US6621811 *31 juli 199916 sept 2003Nortel Networks LimitedMethod and system for generating multiple pilot beacons of different frequencies from a single pilot beacon
US6956527 *24 juni 200218 okt 2005Intel CorporationWireless network access point configuration
US6983156 *27 sept 20023 jan 2006Kabushiki Kaisha ToshibaInformation processing apparatus and communication setting method
US6999776 *29 aug 200214 feb 2006Denso CorporationMobile station having indoor/outdoor mode shifting function
US7020111 *21 dec 200028 maart 2006Interdigital Technology CorporationSystem for using rapid acquisition spreading codes for spread-spectrum communications
US7054627 *29 april 200230 mei 2006Advanced Micro Devices, Inc.Method and system for locating a wireless network access point at a mobile computing device
US7254407 *9 sept 20037 aug 2007Nortel Networks LimitedEfficient delivery of information services information
US7263370 *10 aug 200428 aug 2007At&T Corp.Method for intelligent home controller and home monitor
US7289541 *4 dec 200230 okt 2007Raytheon CompanyMethod for locating and tracking communication units in a synchronous wireless communication system
US7319876 *25 aug 200315 jan 2008Qualcomm IncSystem and method for using equipment identity information in providing location services to a wireless communication device
US7340278 *3 mei 20054 maart 2008Nec CorporationRadio base station device setting system and method for re-setting communication configurations for radio base station device
US7346321 *18 feb 200418 maart 2008Autocell Laboratories Inc.Apparatus for associating access points with stations using bid techniques
US7395074 *8 april 20041 juli 2008Nokia CorporationPosition detection with frequency smoothing
US7433694 *28 okt 20057 okt 2008Skyhook Wireless, Inc.Location beacon database
US7477920 *6 aug 200413 jan 2009Intel CorporationSystem and method for automatically configuring and integrating a radio base station into an existing wireless cellular communication network with full bi-directional roaming and handover capability
US7715471 *24 dec 200411 mei 2010Rambus, Inc.Signaling system with selectively-inhibited adaptive equalization
US7840985 *26 okt 200923 nov 2010Broadcom CorporationMultistream video communication with staggered access points
US8045638 *8 juni 200625 okt 2011Telefonaktiebolaget Lm Ericsson (Publ)Method and apparatus for impairment correlation estimation in a wireless communication receiver
US8169982 *7 aug 20061 mei 2012Qualcomm IncorporatedMethod and apparatus for creating a fingerprint for a wireless network
US20020009521 *16 maart 200124 jan 2002Simon FridlyandFlavored mineral water for pets
US20020082044 *21 dec 200027 juni 2002Davenport David MichaelWireless communication with a mobile asset employing dynamic configuration of a software defined radio
US20030022686 *11 juni 200230 jan 2003Koninklijke Philips Electronics N.V.Noise margin information for power control and link adaptation in IEEE 802.11h WLAN
US20030048758 *7 sept 200113 maart 2003Jones Delon K.Time division duplex system utilizing global positioning system timing signals for access point synchronization
US20030073438 *27 sept 200217 april 2003Kazuya FukushimaInformation processing apparatus and communication setting method
US20030118015 *20 dec 200126 juni 2003Magnus GunnarssonLocation based notification of wlan availability via wireless communication network
US20030144006 *25 jan 200231 juli 2003Mikael JohanssonMethods, systems, and computer program products for determining the location of a mobile terminal based on delays in receiving data packets from transmitters having known locations
US20030214937 *17 mei 200220 nov 2003Bengt LindoffMethod and apparatus for minimizing time of reception during paging
US20040071119 *18 sept 200315 april 2004Yoshihiro IshikawaControl method of searching neighboring cells, mobile station, and mobile, communication system
US20040147232 *26 sept 200329 juli 2004Richard ZodnikWall mounted wireless transceiver that tracks a location of a wireless communication device
US20040162084 *14 feb 200319 aug 2004Atheros Communications, Inc.Positioning with wireless local area networks and WLAN-aided global positioning systems
US20040166886 *25 aug 200326 aug 2004Rajiv LaroiaPilot signals for use in multi-sector cells
US20050009521 *10 juli 200313 jan 2005Preece Scott E.Obtaining service when in a no-coverage area of a communication system
US20050018597 *1 aug 200327 jan 2005Yasuaki YudaRadio base station apparatus
US20050037775 *25 juni 200417 feb 2005Mark MoegleinMethod and apparatus for wireless network hybrid positioning
US20050078033 *15 juni 200414 april 2005Hitachi, Ltd.System and method for position detection of a terminal in a network
US20050227689 *13 april 200413 okt 2005Jewett David TMethod and apparatus for automatic calibration of positioning system base stations
US20050246334 *30 april 20043 nov 2005Hong Kong Applied Science And Technology Research Institute Co., Ltd.Location determination and location tracking in wireless networks
US20050250496 *31 maart 200310 nov 2005Motorola, Inc.Communications methods and apparatus for use therein
US20050272444 *8 juni 20048 dec 2005Heffield Timothy WMethod and system for directing users to coverage
US20060016850 *9 sept 200526 jan 2006Max Co., Ltd.Electric stapler
US20060045134 *25 aug 20042 maart 2006John EldonUltra-wideband synchronization systems and methods
US20060052067 *9 sept 20049 maart 2006Rajendra SinghMillimeter microwave point-to-multipoint broadcasting systems, components and methods that monitor and rebroadcast data packets
US20060148486 *27 dec 20026 juli 2006Kim Jin-KyeongCommunication device having function for searching access point of wireless local area network and method thereof
US20060234739 *28 okt 200519 okt 2006Samsung Electronics Co., Ltd.Method and system for synchronizing a clock for an adjacent network to a clock for an overlay network
US20070002813 *7 juni 20064 jan 2007Tenny Nathan EApparatus and method for determining WLAN access point position
US20070004428 *22 feb 20064 jan 2007Skyhook Wireless, Inc.Continuous data optimization of moved access points in positioning systems
US20070019586 *15 feb 200625 jan 2007Sanjiv NandaMethod and apparatus for locating a wireless local area network in a wide area network
US20070030956 *22 juni 20068 feb 2007Mathias HornigX-ray generator for an x-ray apparatus with x-ray lens module
US20070060130 *7 aug 200615 maart 2007Aleksandar GogicMethod and apparatus for creating a fingerprint for a wireless network
US20070097938 *3 okt 20063 mei 2007Telefonaktiebolaget Lm EricssonAutomatic building of neighbor lists in mobile system
US20070097939 *3 okt 20063 mei 2007Telefonaktiebolaget Lm Ericsson (Publ)Automatic configuration of pico radio base station
US20070105527 *3 okt 200610 mei 2007Telefonaktiebolaget Lm EricssonRedirection of ip-connected radio base station to correct control node
US20070121560 *7 nov 200631 mei 2007Edge Stephen WPositioning for wlans and other wireless networks
US20070164845 *19 dec 200519 juli 2007Checkpoint Systems, Inc.System and method for monitoring security systems
US20070178914 *31 jan 20062 aug 2007Microsoft CorporationDetermining the network location of a user device based on transmitter fingerprints
US20070184185 *4 mei 20059 aug 2007Joern BesingerPowder particles that are uniformly coated with functional groups, method for their production and use thereof
US20070238448 *7 april 200711 okt 2007Gallagher Michael DMethod and system of providing landline equivalent location information over an integrated communication system
US20080153533 *22 dec 200626 juni 2008Holger ClaussenDetecting and reporting a picocell by a mobile station
US20090034501 *23 aug 20075 feb 2009Broadcom CorporationMultiple Antenna Servicing by Multibranch PSYNC detection module
US20090061821 *30 aug 20075 maart 2009Cellco Partnership (D/B/A Verizon Wireless)Pico cell home mode operation
US20090092111 *3 okt 20089 april 2009Qualcomm IncorporatedControl of wireless transmission based on node status
US20090098873 *9 okt 200816 april 2009Qualcomm IncorporatedSystem and method to locate femto cells with passive assistance from a macro cellular wireless network
US20090122773 *5 nov 200814 mei 2009Qualcomm IncorporatedAccess point configuration based on received access point signals
US20090156165 *18 dec 200718 juni 2009Balaji RaghothamanAttracting Access Terminals
US20090163227 *21 dec 200725 juni 2009Qualcomm IncorporatedSystems and methods for targeted advertising on wireless devices based on device location and current user interests
US20090221287 *20 feb 20093 sept 2009Qualcomm IncorporatedCell selection using enhanced general neighbor list methods
US20100054206 *2 sept 20084 maart 2010Amit KalhanHandoff management based on non-traffic state uplink signals
US20100056177 *19 juni 20094 maart 2010Fujitsu LimitedMobile communication system and position detection method
US20100069066 *10 sept 200918 maart 2010Qualcomm IncorporatedNeighboring cell search for mobile communication systems
US20100120394 *11 nov 200813 mei 2010Trueposition, Inc.Femto-Cell Location by Proxy Methods
US20100130212 *23 okt 200927 mei 2010Zte (Usa) Inc.Femto Cell Handover In Wireless Communications
US20100178916 *12 jan 201015 juli 2010Samsung Electronics Co., Ltd.Method and system for notifying availability of femtocells to an electronic device
US20100240397 *28 mei 200823 sept 2010Mats BuchmayerHandling location information for femto cells
US20100246529 *24 sept 200930 sept 2010Kentaro IshizuWireless communication terminal and wireless communication system
US20100260052 *8 april 201014 okt 2010Samsung Electronics Co. Ltd.Apparatus and method for detecting femto base station in wireless communication system
US20100304741 *29 mei 20092 dec 2010Qualcomm IncorporatedNon-Macro Cell Search Integrated with Macro-Cellular RF Carrier Monitoring
US20100329206 *30 juni 200930 dec 2010Thome Timothy ADual idle-traffic state of wireless communication device
US20110105128 *26 okt 20105 mei 2011Motorola Mobility, Inc.System information management in wireless communication systems
US20110130115 *25 okt 20102 juni 2011Muthaiah VenkatachalamMechanisms to update a serving base station with the csg memberships of a mobile station
US20110134833 *8 dec 20099 juni 2011Qualcomm IncorporatedControlling access point functionality
US20110170481 *10 jan 201114 juli 2011Interdigital Patent Holdings, Inc.Method and apparatus for managing csg priorities in idle and connected modes
US20110205932 *23 feb 201025 aug 2011Research In Motion LimitedSystem and method for detecting a target cell in a cellular network
US20120015649 *6 dec 201019 jan 2012Samsung Electronics Co., Ltd.Methods and apparatus to support base station detection and selection in multi-tier wireless networks
US20120106349 *29 april 20113 mei 2012Interdigital Patent Holdings, Inc.Home node identification, interference reduction, and energy savings
US20120108199 *26 april 20113 mei 2012Interdigital Patent Holdings, Inc.Using personal wireless devices for network testing
US20120122492 *12 mei 201117 mei 2012Qualcomm IncorporatedMethod and apparatus for updating femtocell proximity information
US20120142362 *7 dec 20117 juni 2012Ntt Docomo, Inc.Access control method for certain user targeted base station, base station apparatus and mobile communication management apparatus
US20120220310 *30 april 201230 aug 2012Qualcomm IncorporatedMethod and apparatus for creating a fingerprint for a wireless network
Verwijzingen naar dit patent
Citerend patent Aanvraagdatum Publicatiedatum Aanvrager Titel
US848908716 nov 201016 juli 2013Pantech Co., Ltd.Apparatus and method for controlling small base station
US8509778 *28 mei 200813 aug 2013Telefonaktiebolaget Lm Ericsson (Publ)Handling location information for femto cells
US883809629 mei 200916 sept 2014Qualcomm IncorporatedNon-macro cell search integrated with macro-cellular RF carrier monitoring
US889777520 dec 201125 nov 2014Electronics And Telecommunications Research InstituteMethod and system for searching femtocell access points
US892389212 mei 201130 dec 2014Qualcomm IncorporatedMethod and apparatus for updating femtocell proximity information
US9055584 *16 maart 20119 juni 2015Sony CorporationManagement server, base station, communication system, and communication method
US9135648 *22 juni 201215 sept 2015Kt CorporationMethod, terminal, server, and system for providing a service
US91377459 okt 200815 sept 2015Qualcomm IncorporatedSystem and method to locate femto cells with passive assistance from a macro cellular wireless network
US914886630 april 201229 sept 2015Qualcomm IncorporatedMethod and apparatus for creating a fingerprint for a wireless network
US9220109 *30 jan 201422 dec 2015Commissariat Ó l'Únergie atomique et aux Únergies alternativesMethod for modifying the state of local access points in a cellular network
US92536535 nov 20082 feb 2016Qualcomm IncorporatedAccess point configuration based on received access point signals
US9301156 *10 maart 201129 maart 2016Interdigital Patent Holdings, Inc.Location determination of infrastructure device and terminal device
US9451400 *16 dec 201520 sept 2016Interdigital Patent Holdings, Inc.Location determination of infrastructure device and terminal device
US951656425 april 20146 dec 2016At&T Intellectual Property I, L.P.Enhancement of a cell reselection parameter in heterogeneous networks
US96212942 okt 201411 april 2017At&T Intellectual Property I, L.P.Enhancement of inter-cell interference coordination with adaptive reduced-power almost blank subframes based on neighbor cell profile data
US963556625 april 201425 april 2017At&T Intellectual Property I, L.P.Enhancement of access points to support heterogeneous networks
US97751469 maart 201526 sept 2017Sony CorporationManagement server, base station, communication system, and communication method
US20090098873 *9 okt 200816 april 2009Qualcomm IncorporatedSystem and method to locate femto cells with passive assistance from a macro cellular wireless network
US20090122773 *5 nov 200814 mei 2009Qualcomm IncorporatedAccess point configuration based on received access point signals
US20100093376 *14 okt 200815 april 2010Del Castillo ManuelMethod and system for area code rough initial position for gnss assistance data in a communication network
US20100124925 *4 nov 200920 mei 2010Samsung Electronics Co., Ltd.Network search method and system for mobile station
US20100240397 *28 mei 200823 sept 2010Mats BuchmayerHandling location information for femto cells
US20100304741 *29 mei 20092 dec 2010Qualcomm IncorporatedNon-Macro Cell Search Integrated with Macro-Cellular RF Carrier Monitoring
US20110134833 *8 dec 20099 juni 2011Qualcomm IncorporatedControlling access point functionality
US20110143740 *16 nov 201016 juni 2011Pantech Co., Ltd.Apparatus and method for controlling small base station
US20110237268 *16 maart 201129 sept 2011Sony CorporationManagement server, base station, communication system, and communication method
US20120326848 *22 juni 201227 dec 2012Kt CorporationMethod, terminal, server, and system for providing a service
US20130217408 *10 maart 201122 aug 2013Interdigital Patent Holdings, Inc.Location determination of infrastructure device and terminal device
US20140220994 *30 jan 20147 aug 2014Commissariat A L'energie Atomique Et Aux Ene AltMethod for modifying the state of local access points in a cellular network
Classificaties
Classificatie in de VS455/456.1
Internationale classificatieH04W64/00
Co÷peratieve classificatieY02B60/50, H04W84/045, H04J11/0069, H04W48/20, H04W4/02, H04W64/00
Europese classificatieH04J11/00J, H04W48/20
Juridische gebeurtenissen
DatumCodeGebeurtenisBeschrijving
17 nov 2008ASAssignment
Owner name: QUALCOMM INCORPORATED, CALIFORNIA
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:GOGIC, ALEKSANDAR M.;GUPTA, RAJARSHI;REEL/FRAME:021845/0145;SIGNING DATES FROM 20081022 TO 20081023