Source: http://www.google.nl/patents/US8532567
Timestamp: 2017-12-13 22:39:02
Document Index: 366637420

Matched Legal Cases: ['Application No. 60', 'art 2001', 'art 2003', 'art 2005', 'art 2016', 'art 2016']

Patent US8532567 - Method and apparatus for creating and using a base station almanac for ... - Google Patenten
A method and apparatus for creating and using a base station almanac for position determination is described. The base station almanac includes a number of records, where each record can describe a sector or a transmitter (e.g., a base station or a repeater) in a wireless communication network. Each...http://www.google.nl/patents/US8532567?utm_source=gb-gplus-sharePatent US8532567 - Method and apparatus for creating and using a base station almanac for position determination
Publicatienummer US8532567 B2
Aanvraagnummer US 11/501,433
Aanvraagdatum 8 aug 2006
Ook gepubliceerd als CN1849525A, CN1849525B, CN102901976A, CN102901976B, US7123928, US20050020309, US20060276202, WO2005050245A2, WO2005050245A3
Publicatienummer 11501433, 501433, US 8532567 B2, US 8532567B2, US-B2-8532567, US8532567 B2, US8532567B2
Patentcitaties (187), Niet-patentcitaties (16), Verwijzingen naar dit patent (8), Classificaties (17), Juridische gebeurtenissen (2)
US 8532567 B2
storing, in a single record of the base station almanac, at least two data values for a single attribute of a single transmitting entity, wherein each of the at least two data values is stored in a respective instance or part of a field in the single record of the single transmitting entity; and
2. The method of claim 1, wherein the at least two data values are for at least two identifiers for the single transmitting entity.
3. The method of claim 1, wherein the at least two data values are for a function used to estimate coverage area of the single transmitting entity.
4. The method of claim 1, wherein the at least two data values are for at least two maximum antenna ranges (MARs) for the single transmitting entity.
5. The method of claim 1, wherein the at least two data values are for at least two frequencies used by the single transmitting entity.
6. The method of claim 5, wherein the record further includes a calibration value for each of the at least two frequencies.
8. A method of using a base station almanac for position determination in a wireless communication network, comprising:
storing, in a single record of the base station almanac, at least two maximum antenna ranges (MARs) for a single transmitting entity associated with the single record wherein each of the at least two MARs is associated with a respective reference power level, and wherein each MAR is indicative of a geographic area within which a wireless terminal is expected to be located if received signal strength measured by the wireless terminal for the single transmitting entity meets or exceeds the reference power level associated with the MAR; and
selecting one of the at least two MARs based on received signal strength measured by a wireless terminal for the single transmitting entity, wherein the estimated MAR is equal to the selected MAR.
11. The method of claim 9, wherein the estimated MAR is obtained by interpolating between the at least two MARs.
12. The method of claim 9, wherein the estimated MAR is obtained by curve fitting the at least two MARs.
16. A method of using a base station almanac for position determination in a wireless communication network, comprising:
using the enclosed space indicators for the plurality of records for position determination of a wireless terminal in a wireless communication network by selectively omitting a search for satellite signals based upon whether the enclosed space indicator for a given record among the plurality of records indicates an enclosed environment for a given transmitting entity associated with the wireless terminal.
identifying the given transmitting entity for a signal received by the wireless terminal;
retrieving the given record in the base station almanac for the given transmitting entity; and
19. A position determination system comprising:
a controller operative to use the enclosed space indicators for the plurality of records for position determination of a wireless terminal in a wireless communication network by selectively omitting a search for satellite signals based upon whether the enclosed space indicator for a given record among the plurality of records indicates an enclosed environment for a given transmitting entity associated with the wireless terminal.
20. A position determination system configured to use a base station almanac for position determination in a wireless communication network, comprising:
a storage unit configured to store, in a single record of the base station almanac, at least two data values for a single attribute of a single transmitting entity, wherein each of the at least two data values is stored in a respective instance or part of a field in the single record of the single transmitting entity; and
a controller configured to use the at least two data values in the field of the record for position determination for wireless terminals in the wireless communication network.
21. A position determination system configured to use a base station almanac for position determination in a wireless communication network, comprising:
means for storing, in a single record of the base station almanac, at least two data values for a single attribute of a single transmitting entity, wherein each of the at least two data values is stored in a respective instance or part of a field in the single record of the single transmitting entity; and
means for using the at least two data values in the field of the record for position determination for wireless terminals in the wireless communication network.
22. A non-transitory computer-readable medium containing instructions stored thereon, which, when executed by a position determination system configured to use a base station almanac for position determination in a wireless communication network, cause the position determination system to perform actions, the instructions comprising:
program code to store, in a single record of the base station almanac, at least two data values for a single attribute of a single transmitting entity, wherein each of the at least two data values is stored in a respective instance or part of a field in the single record of the single transmitting entity; and
program code to use the at least two data values in the field of the record for position determination for wireless terminals in the wireless communication network.
23. A position determination system comprising:
means for storing an enclosed space indicator for each of a plurality of records of the base station almanac, wherein the enclosed space indicator for each record indicates whether a transmitting entity described by the record is associated with an enclosed environment; and
means for using the enclosed space indicators for the plurality of records for position determination of a wireless terminal in a wireless communication network by selectively omitting a search for satellite signals based upon whether the enclosed space indicator for a given record among the plurality of records indicates an enclosed environment for a given transmitting entity associated with the wireless terminal.
24. A non-transitory computer-readable medium containing instructions stored thereon, which, when executed by a position determination system configured to use a base station almanac for position determination in a wireless communication network, cause the position determination system to perform actions, the instructions comprising:
program code to store an enclosed space indicator for each of a plurality of records of the base station almanac, wherein the enclosed space indicator for each record indicates whether a transmitting entity described by the record is associated with an enclosed environment; and
program code to use the enclosed space indicators for the plurality of records for position determination of a wireless terminal in a wireless communication network by selectively omitting a search for satellite signals based upon whether the enclosed space indicator for a given record among the plurality of records indicates an enclosed environment for a given transmitting entity associated with the wireless terminal.
This application is a divisional of U.S. patent application Ser. No. 10/765,231, filed on Jan. 26, 2004 now U.S. Pat. No. 7,123,928, which also claims priority to U.S. Provisional Application No. 60/489,038, filed on Jul. 21, 2003.
Hybrid Position fix based on a combination of GPS and
cellular measurements. Intermediate accuracy.
A-FLT Position fix based solely on cellular measurements.
Reduced accuracy. Commonly available in urban area
and may be available where GPS is not available
Enhanced Cell-ID Position fix based solely on cellular measurements.
Low accuracy. Generally depends on the sector size
and the accuracy of timing and/or signal strength
Cell-ID Position fix based solely on a cellular measurement.
Lowest accuracy. Provides only the identity of the
cell where the terminal is located. Accuracy is
dependent on the size of the cell.
The base station almanac may be designed to support various protocols for position determination. These protocols may include IS-801, J-STD-36, and GSM 04.31 Radio Resource LCS Protocol (RRLP). IS-801 is an air-interface protocol for position determination in IS-95 and IS-2000. J-STD-36 covers ANSI-41 network protocol and IS-801 air-interface protocol and is described in a document TIAIEIA J-STD-036-A, entitled “Wireless Enhanced Emergency Services, Phase II.” Position determination for GSM and W-CDMA is described in a document GSM 04.31, entitled “Digital Cellular Telecommunications System (Phase 2+); Location Services (LCS); Mobile Station (MS)—Serving Mobile Location Centre (SMLC) Radio Resource LCS Protocol (RRLP).” All of these documents are publicly available.
1 Format Type Format type for UCHAR
2 Num Protocols Number of protocols UCHAR
supported by the record
3 Protocol Type Protocol(s) supported UCHAR
5 Unique Sector The unique ID(s) for 8-byte field
Identification the sector
6 Antenna Position Information for the 20-byte field
Information sector antenna position
7 Antenna Orientation Orientation of the INT2
8 Antenna Opening Opening of the sector UINT2
9 Maximum Antenna Information for the 4-byte field
Range Information maximum antenna range
(MAR) for the sector
10 Terrain Height Information describing 4-byte field
Information the terrain of the sector
12 Enclosed Space Indicate whether the UCHAR
Indicator sector is associated
with an enclosed
13 Time Reference Reference time for 6-byte field
14 Frequency List List of frequencies Variable
applicable for the
15 Optional Fields Mask indicating which UINT4
Mask optional fields, if
any, are included in
16 CDMA Transmit PN PN offset assigned to 3-byte field
and Increment the sector and the
PN increment used for
17 Sector Center Information for the 18-byte field
18 RF Link Information Information for sector 3-byte field
19 Future Expansion Optional fields for Variable
ID1 SID SID or MarketID MCC MCC UINT2
A network operator may store multiple MARs for multiple reference power levels for a sector. For example, three MARs may be provided for high, intermediate, and low power levels such as −55 dBm, −115 dBm, and −135 dBm, respectively. In this case, the MAR for −55 dBm is used if the received power level (Prx) is −55 dBm or higher, the MAR for −115 dBm is used if −55 dBm>Prx≧2−115 dBm, and the MAR for −135 dBm is used if −115 dBm m>Prx≧−135 dBm. Alternatively, the MAR to be used could be interpolated based the received power level.
The Terrain Height Information field contains information for the terrain of the coverage area of the sector. Table 8 shows an embodiment of this field, which includes an Average Terrain Height subfield and a Terrain Height Standard Deviation subfield. The Average Terrain Height subfield indicates the average terrain height for the sector coverage area, where the average is determined based on statistics available for the coverage area and may be referenced to the WGS-84 ellipsoid. The Terrain. Height Standard Deviation subfield indicates the 1-sigma uncertainty associated with the average terrain height. The terrain height average and standard deviation values may be derived from accurate terrain elevation maps (e.g., a high quality Digital Terrain Elevation mapping database) or other direct empirical methods.
Terrain Height UINT2 1 to 10000 1 Meter
The Repeater Flag field contains repeater information for the sector. A repeater receives, conditions, and retransmits signals on both the forward link (i.e., the path from the base station to the mobile unit) and reverse link (i.e., the path from the mobile unit to the base station). The Repeater Flag field may be set to 0 if the BSA record is describing a base station that does not have any repeater. The Repeater Flag field may be set to 1 if the BSA record is describing a generalized coverage area for a donor base station and all of its repeaters. For a repeated sector (i.e., a sector with repeaters), all of the information in the record is for the generalized coverage area. In particular, the sector center is the centroid of the coverage areas of all transmitters (i.e., the donor base station as well as the repeaters) and is associated with relatively large uncertainty, and the MAR(s) should encompass the coverage areas of all transmitters. Calibration values (described below) should include path delays and extra hardware. delays, and the calibration uncertainties should account for spread in the calibration values from the donor base station and all repeaters. The Repeater Flag field may be set to 2 if the BSA record is describing only the donor base station for a repeated sector. In this case, the repeaters may be described separately with one or more additional BSA records.
NumFLCs Number of UCHAR 0 to 50
(Ncf) forward link
NumRLCs Number of UCHAR 0 to 50
(Ncr) reverse link
RevLinkCal1 Reverse Link FLOAT −30000 to +30000 Meters
NumFLCs (Ncf) Number of UCHAR 0 to 50
FwdLinkCal2 TN UINT2 0 to 7 Time slots
Dc = MAR 4 × sin c ( antenna opening 2 ) , Eq ( 1 )
where sinc (x)=sin(x)/x. The PDE may compute the sector center as shown in equation (1) if the BSA record does not include the Sector Center Information field.
Suburban, low density with dense vegetation 7
After steps 526, 528, and 530, a determination is made whether or not all fields of the record have been considered (step 532). If the answer is ‘no, then the process returns to step 522 to select the next field to populate with data. Otherwise, if all fields have been considered, then the record is stored in the base station almanac database (step 540) and the process terminates.
On the reverse link, terminal 110 may transmit data, pilot, and/or signaling to a “serving” base station, which for this case may be base station 120. A transmit (TX) data processor 716 processes the various types of data, and a transmitter unit 718 further conditions the processed data to obtain a reverse link signal, which is then transmitted via antenna 702. Base station 120 receives the reverse link signal from terminal 110 at antenna 732. A receiver unit 734 conditions the receiver input signal, and a data processor 724 processes the conditioned signal to obtain data transmitted by terminal 110, which may then be provided to a controller 720. Base station 120 communicates with PDE 170 via a communication (Comm) unit 726.
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Classificatie in de VS 455/13.3, 455/12.1, 342/357.22, 455/562.1, 342/357.21
Internationale classificatie G01S19/46, G01S19/06, G01S5/02, G01S19/25, H04W64/00, H04B7/185, G01S5/14
Coöperatieve classificatie G01S5/0273, G01S5/0236, G01S19/46, G01S5/0268, H04W64/00
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Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:MOEGLEIN, MARK LEO;RILEY, WYATT THOMAS;SIGNING DATES FROM 20080206 TO 20080208;REEL/FRAME:020490/0536