JP2002540644A - Provision of GPS Auxiliary Data in WCDMA Network - Google Patents

Abstract

(57) [Summary] In this method, differential GPS (DGPS) auxiliary data (58, 59) is supplied by a WCDMA wireless communication network (10) to facilitate position detection of a mobile communication device (12, 20). The method includes providing DGPS auxiliary data over a dedicated physical data channel (DPDCH) and / or a dedicated physical control channel (DPCCH). A mobile communication terminal has an integrated GPS receiver and can include a cellular or PCS telephone handset, portable computer, PDA, and the like. The present invention facilitates a DGPS ancillary data supply mechanism for realizing position detection of a mobile communication device to an accuracy of about 5 m.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001] The present invention relates generally to wireless communication networks, and more particularly to a wideband code division multiple access (WCDMA) third generation (3G) network for mobile location.

BACKGROUND OF THE INVENTION Wireless communication networks, including fixed radios and cellular mobiles, continue to evolve. Currently available technologies for providing wireless communication are CDMA, TDMA, G
There are several, including SM, AMPS and D-AMPS. These networks continue to be deployed worldwide. Many equipment suppliers around the world now manufacture these diverse systems and work through standards groups to ensure the commonality and operational compatibility of these various systems.

As wireless communication networks move into the next century, a new type of wireless network, now known as Wideband Code Division Multiple Access (WCDMA) based on third generation (3G) networks, is developing. These third generation wireless systems are becoming increasingly realistic for FPLMN.

There is a need for providing location of mobile subscribers within a wireless network. Current implementations are based on time difference of arrival (TDOA) technology with an accuracy up to about 18 m. Although this accuracy is sufficient for some functions and can be implemented in today's networks, there is a need for more accurate location of mobile subscribers. Improved mobile station-based location methods will be used for location and will also reduce the need for additional capacity required in the network. The development of the technology being discussed by the standards committee to determine how to best achieve the improved location method of mobile stations, especially in WCDMA based on 3G networks, is still ongoing.

SUMMARY OF THE INVENTION [0005] The present invention provides a dedicated physical data channel (DPDCH) and / or a dedicated physical control channel (DPCCH) within a WCDMA network in a differential GPS (DGPS).
l Achieve technical advantages as a way to supply GPS) auxiliary data. By providing DGPS ancillary data on these channels, WCs based on 3G networks
A mobile station with a GPS receiver in a DMA can determine its position accurately to an accuracy of about 5 m.

A mobile user terminal may consist of a mobile station of the mobile cellular type, such as a PCS or a cellular telephone, but may also include a computer or a PDA.

[0007] A mobile communication terminal according to the present invention includes a mechanism for exchanging wireless communication with a serving wireless communication network and means for receiving DGPS auxiliary data on a dedicated physical channel such as DPDCH or DPCCH. The mobile communication terminal further comprises circuitry and software in the GPS receiver for determining the position of the mobile communication terminal as a function of this GPS auxiliary data with improved resolution.

FIG. 1 shows a block diagram of a communication network 10 according to a preferred embodiment of the present invention. Communication network 10 preferably comprises a wireless telephone network to include a calling mobile station 12 connected by an RF communication link to a serving WCDMA calling network 14. The calling mobile station 12 is preferably a wireless communication device comprising a wireless mobile station. In the figure, the calling WCDMA network 14 is connected to a transit network or communication link 16, which may comprise the public switched telephone network (PSTN), but may also include other networks, including optical networks if desired. You may.

[0009] The transit network 16 is a digitized voice call.
Are interfaced and communicated with the calling network 14 and the called network 18. The called network 18 may be the same as or different from the calling network 14, such as AMPS, D-AMPS, TDMA, GS
M and IS-95 networks. For purposes of explanation, the called network 18 is described as a WCDMA network. The called network 18 is connected and provides services via a RF link to a called mobile station 20, which may be a fixed or mobile station, such as a wireless cellular or PCS subscriber station. Wireless stations and networks may include codecs for providing encoding and decoding of digital signals communicated over transit network 16.

The calling WCDMA network 14 includes a base transceiver station (BTS) 30 that services the calling mobile or fixed station 12 via a radio frequency (RF) link. Although only one is shown for ease of illustration and understanding, each BTS 30
Provides services to a plurality of stations 12. The calling network 14 comprises a radio network controller (RNC) 32 and a network switching system (NSS) 34
Further included. Sometimes the BTS and RNC are collectively referred to as the base switching center (BSS).

The RNC 32 interfaces voice calls between the plurality of BTSs 30 and the NSS 34. Although only one is shown for the purpose of illustration and understanding,
The NC 32 generally provides services to a plurality of BTSs 30. Similarly, although only one is shown for purposes of illustration of the present invention, NSS 34 provides service to multiple RNCs 32. The NSS 34 includes a home location register (HLR), a mobile station location node, and a visitor location register (VLR) that contains and stores various information of the station 12 currently being served by the calling network 14.

The called network 18 includes a BTS 40 that serves a called station 20 and generally provides services to a plurality of stations 20. Called network 18 further includes RNC 42 and NSS 44. The called network 18 is the same operating protocol as the calling network 14, ie, both are WCDMA networks, or the called network 18 is a different operating protocol than the calling network 14, ie, the calling network 14 May be WCDMA and the called network may be based on AMPS, D-AMPS, GSM, TDMA or IS-95 protocols. NSS 44 includes an HLR and a VLR for maintaining a record of information for all stations 20 currently served by called network 18. The reference GPS receiver 46 transmits the GPS ancillary data location information to the network 14 and the network 18 for use by the calling mobile station 12 according to the present invention.
Supply to each.

The transit network 16 is preferably a PSTN. The calling NSS 34 and the called NSS 44 are preferably encoded in pulse code modulation (PCM) format,
Exchanges digitized voice data transmitted at 4 kbps. Although PCM is the preferred encoding format, other encoding formats can be used with the present invention. Similarly, transmission rates other than 64 kbps are also envisioned by the present invention. In general,
The digitized voice data transmitted over the transit network 16 may be in any format that is compatible and supported by both the calling network 14 and the called network 18.

Referring to FIG. 2, reference numeral 50 denotes a message flow for providing differential GPS (DGPS) auxiliary data from the reference GPS receiver 46 to the user terminal 12 via the relay network 16. As shown at 52, DGPS
The ancillary data is transmitted by a node, such as the BTS 32, of the network 10 to the user terminal 12 via the air interface to the dedicated physical data channel (DPDCH).
) Or on a dedicated physical control channel (DPCCH).

At 54, a location request message is transmitted by the RNC / core network 34 to initiate location of the user terminal 12. This message is immediately transferred to the user terminal 12 by the BTS / Node B 32 as a location request message 56.

At 58, the user terminal 12 determines the position of the DGPS auxiliary data provided from the network 10 or detects the position of the user terminal 12 using GPS satellite information according to techniques well known in the art. It has an integrated GPS receiver that processes to assist. The differential GPS auxiliary data may be processed at a speed to search for a priori information from a GPS satellite (not shown) to determine the position of the user terminal 12 to a resolution of about 5 m. User terminal 1
2 is transmitted from the user terminal 12 to the BTS by the position detection response message 58.
/ Node B 32 and the message is forwarded to the RNC / core network 34 in a location response message 59. Then, the DGPS auxiliary data is continuously supplied via the air interface on the DPDCH or DPCCH for future use.

User terminal 12 may include a number of mobile communication devices, including PCS and cellular type mobile phones, computers equipped with appropriate remote access circuitry, and PDAs. Therefore, it is not implied that the present invention limits the user terminal 12 to a particular format. Rather, the present invention contemplates providing a particular type of DGPS ancillary data on one or both of the DPDCH or DPCCH on a WCDMA carrier to provide a positioning accuracy of up to about 5 m. The integrated DGPS receiver in the WCDMA terminated user terminal may be built into the device, such as embedded in the mobile station handset, or may be an accessory. Furthermore, external PCs and PDs
A may be provided with an integrated DGPS receiver and used as a highly accurate map tool for vehicle management and the like.

FIG. 3 is a block diagram illustrating one form of communication of DGPS ancillary data provided to mobile user 12 over a dedicated physical control channel (DPCCH). As shown, one data packet 60 of the DPCCH is composed of slots having a time frame of about 0.625 ms. The data packet 60 includes an N-bit header including a pilot signal, a transport frame indicator (TFI), and a transport power control (Transport Power Control: TPC). The TPC is generally used for power control of the mobile station 12 in the uplink.

The data packet 60 comprises one of several time slots of a frame, indicated generally at 62, which together have a frame time of about 10 milliseconds. This frame 62 constitutes one of a plurality of frames making up a superframe having a period of about 720 milliseconds.

Still referring to FIG. 3, the DGPS auxiliary data generally comprises about five slots 60 in frame 62. However, as the standard evolves, the number of slots required to provide DGPS ancillary data may be increased or decreased.
No limitation on the number or length of slots required to provide S-auxiliary data is implied.

FIG. 4 shows another embodiment of the present invention in which DGPS auxiliary data is provided by a dedicated physical control channel (DPDCH) 70. Each information packet 70 is frame 7
2 form one of several packets. These slots collectively form one of several frames 72 that make up the superframe 74.
In this embodiment, the DGPS ancillary data is provided by about four or five slots 70, but the present invention does not imply any limitation on the type of information.

According to the present invention, the DGPS auxiliary data is stored in the WC to assist the position detection of the mobile user.
A technical advantage is achieved by providing mobile users with the DPDCH and / or DPCCH of the DMA3G wireless communication network. The present invention relates to a mobile communication terminal 12.
And a mechanism that facilitates position detection with an accuracy up to about 5 m. The user terminal 12 has an integrated D for facilitating communication with the WCDMA network 10.
A GPS receiver is provided. Further, the user terminal 12 is provided with both circuits and software that facilitate the location detection of the mobile terminal 12 using DGPS auxiliary data. The present invention comprises a mechanism for providing data to provide high precision map tools, fleet management, etc. in a 3GW CDMA network.

While the invention has been described with respect to particular preferred embodiments, many variations and modifications will become apparent to those skilled in the art upon reading the invention. Therefore, the appended claims should be construed as broadly as possible in view of the prior art so that the invention includes all such variations and modifications.

[Brief description of the drawings]

FIG. 1 is a block diagram of a wireless communication network including a WCDMA network for a third generation system.

FIG. 2 illustrates WDMA to support DGPS location of mobile stations in a network.
Differential GPS (DGPS) on DPDCH or DPCCH on carrier
3) a flow chart of the method of the invention for providing auxiliary data;

FIG. 3 is a block diagram illustrating a format example for providing DGPS auxiliary data on a DPCCH.

FIG. 4 is a block diagram of another embodiment of the present invention for providing DGPS ancillary data on the DPDCH.

[Procedural Amendment] Submission of translation of Article 34 Amendment of the Patent Cooperation Treaty

[Submission date] December 18, 2000 (2000.18.18)

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0004

[Correction method] Change

[Contents of correction]

There is a need for providing location of mobile subscribers within a wireless network. Current implementations are based on time difference of arrival (TDOA) technology with an accuracy up to about 18 m. An example of such implementation, International Patent Publication No. WO96 15636A No., issued May 23, 1996, the positioning system and method using "mobile communication network (Locating system and Mehod Using a Mobile Communications N etwork ) "(HIGHWAYMAS TERS COMMUNICATIONS, INC.) (Hereinafter, referred to as" WO96 15636 "). WO96 15636 discloses a differential position detection system using the position satellite based radio navigation system, such as the NAVSTAR positioning system to determine. The position detection technique of WO 96 15636 involves the measurement of the propagation time of position signals from satellites . Moreover, to improve the point orientation correction mobile unit in WO96 15636 (position fix), a set of reference position receiver generates a correction date (correction date). Although the accuracy of conventional location techniques as disclosed in WO 96 15636 is sufficient for some functions and can be implemented in today's networks, more precise location of mobile subscribers is required. ing. In particular, the differential position detection system and other similar position detection technologies of WO 96 15636 are unsuitable for today's modern 3G wireless networks. Improved mobile station-based location methods will be used for location and will also reduce the need for additional capacity required in the network. The development of the technology being discussed by the standards committee to determine how to best achieve the improved location method of mobile stations, especially in WCDMA based on 3G networks, is still ongoing.

[Procedure amendment 2]

[Document name to be amended] Statement

[Correction target item name] Claims

[Correction method] Change

[Contents of correction]

[Claims]

2. The method according to claim 2, wherein said mobile user terminal comprises a wireless mobile telephone.

3. The method of claim 2, wherein said mobile user terminal comprises a computer.

4. A method according to claim 2, wherein said mobile user terminal is characterized in that it comprises a PDA.

7. A mobile communication terminal (12), means for exchanging a wireless communication network information to provide a service and receives DGPS auxiliary data via a dedicated channel, the mobile communication terminal (12) A mobile communication terminal comprising means for determining a position as a function of said DGPS auxiliary data.

Wherein said wireless communications network is a wideband code division multiple access (
Mobile communication terminal according to claim 7 , comprising a ( WCDMA) network (10) , wherein said switching means is adapted for communication with said WCDMA network (10) .

Wherein said terminal is a mobile communication terminal according to claim 8, wherein the includes a wireless mobile telephone (12).

10. A mobile communication terminal according to claim 8, wherein the including the terminal computer (12).

Wherein said terminal is a mobile communication terminal according to claim 8, characterized in that it comprises a PDA (12).

Wherein said DGPS means for receiving the auxiliary data is characterized in that it operates on the dedicated physical control switch Yaneru (DPCCH) according to claim 7 mobile communication terminal end described (12).

[Procedural Amendment] Submission of translation of Article 34 Amendment of the Patent Cooperation Treaty

[Submission date] March 12, 2001 (2001.3.12)

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0015

[Correction method] Change

[Contents of correction]

At 54, a location request message is transmitted by the RNC / core network 32 to initiate location of the user terminal 12. This message is immediately forwarded by the BTS / Node B 30 to the user terminal 12 as a location request message 56.

[Procedure amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0016

[Correction method] Change

[Contents of correction]

At 58, the user terminal 12 determines the position of the DGPS auxiliary data provided from the network 10 or detects the position of the user terminal 12 using GPS satellite information according to techniques well known in the art. It has an integrated GPS receiver that processes to assist. The differential GPS auxiliary data may be processed at a speed to search for a priori information from a GPS satellite (not shown) to determine the position of the user terminal 12 to a resolution of about 5 m. User terminal 1
2 is transmitted from the user terminal 12 to the BTS by the position detection response message 58.
/ Node B 30 and the message is forwarded to the RNC / core network 32 in a Locate Response message 59. Then, the DGPS auxiliary data is continuously supplied via the air interface on the DPDCH or DPCCH for future use.

[Procedure amendment 3]

[Document name to be amended] Statement

[Correction target item name] Claims

[Correction method] Change

[Contents of correction]

[Claims]

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Claims (20)

[Claims] 1. A method for providing GPS ancillary data to a mobile user terminal in a wireless communication network, comprising: a) providing DGPS auxiliary data from a system node of the wireless communication network to the mobile user terminal; B) receiving the DGPS assistance data on the DPDCH to determine its location. 2. The wireless communication network as claimed in claim 1, wherein said wireless communication network comprises a wideband code division multiple access.
The method of claim 1, wherein the method is a WCDMA network. 3. The method of claim 2, wherein said mobile user terminal comprises a wireless mobile telephone. 4. The method of claim 2, wherein said mobile user terminal comprises a computer. 5. The method of claim 2, wherein said mobile user terminal includes a PDA. 6. A method for providing GPS ancillary data to a mobile user terminal in a wireless communication network, comprising: a) providing DGPS auxiliary data from a system node of the wireless communication network to the mobile user terminal; B) receiving the DGPS auxiliary data on the DPCCH to determine its location. 7. The wireless communication network as claimed in claim 1, wherein said wireless communication network comprises a wideband code division multiple access.
The method of claim 6, wherein the method is a WCDMA network. 8. The method according to claim 7, wherein said mobile user terminal comprises a wireless mobile telephone. 9. The method of claim 7, wherein said mobile user terminal comprises a computer. 10. The method of claim 7, wherein said mobile user terminal includes a PDA. 11. A mobile communication terminal, comprising: means for exchanging information with a radio communication network providing a service; receiving DGPS auxiliary data via a dedicated physical data channel (DPDCH); A mobile communication terminal comprising: means for determining as a function of the DGPS auxiliary data. 12. The mobile communication terminal according to claim 11, wherein said wireless communication network comprises a wideband code division multiple access (WCDMA) network and said switching means is adapted for communication with said WCDMA network. . 13. The terminal of claim 1, wherein the terminal comprises a wireless mobile phone.
2. The mobile communication terminal according to 2. 14. The terminal according to claim 1, wherein the terminal includes a computer.
2. The mobile communication terminal according to 2. 15. The mobile communication terminal according to claim 12, wherein said terminal includes a PDA. 16. A mobile communication terminal, comprising: means for exchanging information with a wireless communication network providing a service; and receiving DGPS auxiliary data via a dedicated physical control channel (DPCCH).
A mobile communication terminal, comprising: means for determining a position of the mobile communication terminal as a function of the DGPS auxiliary data. 17. The mobile communication terminal according to claim 16, wherein said wireless communication network comprises a wideband code division multiple access (WCDMA) network and said switching means is adapted for communication with said WCDMA network. . 18. The terminal of claim 1, wherein the terminal comprises a wireless mobile phone.
7. The mobile communication terminal according to 7. 19. The terminal according to claim 1, wherein the terminal includes a computer.
7. The mobile communication terminal according to 7. 20. The mobile communication terminal according to claim 17, wherein the terminal includes a PDA.