KR20180102774A - Method, apparatus and system for indoor satellite navigation signal transmission - Google Patents

Abstract

In order to transmit (or transmit) satellite signals in an Indian language environment, the apparatus according to the present invention receives satellite information and time information from a satellite position information server through a wireless communication network, and receives accurate position information A new satellite signal can be generated and transmitted so that the user's normal satellite signal receiver can receive satellite signals without the need for a separate upgrade or additional device such as a wireless communication modem. That is, according to the present invention, there is provided an indoor satellite signal transmitting method, apparatus, and system that allow a user to use a conventional satellite signal receiver as it is when the device is installed in any position or place capable of connecting to a wireless communication network . In addition, an assisted software satellite signal processing method may be used, and wireless communication processing and satellite signal processing may be multiplexed to be implemented in a single processor.

Description

[0001] METHOD, APPARATUS AND SYSTEM FOR INDOOR SATELLITE NAVIGATION SIGNAL TRANSMISSION [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an indoor satellite signal transmission method, apparatus and system, and more particularly to a method and apparatus for transmitting an indoor satellite signal, And more particularly, to a method, apparatus,

Global Navigation Satellite System (GNSS) is a satellite navigation system (GNSS) that arranges dozens of satellites in a uniform shape on a space orbit, so that it can cover the whole earth all the time, , Altitude, speed, and time information. US Global Positioning System (GPS), Russia's GLONASS (Global Orbiting Navigation Satellite System), Europe's Galileo, China's Beidou, Japan's QZSS (Quasi-Zenith Satellite System) and India's IRNSS (Indian Regional Navigation Satellite System) It is a representative satellite navigation system. Currently, GPS and GLONASS are actively providing services globally.

A satellite signal receiver receives signals transmitted from four or more satellites to determine the position of the satellites and the receiver. The distance between the satellite and the receiver can be obtained by measuring the time difference between the signal transmitted from the satellite and the signal received from the receiver. The transmitted signal includes satellite related information (ephemeris, almanac, etc.) Is included. However, due to the frequency characteristics, the satellite signal has a problem that it can not be received in an indoor environment, for example, in an indoor, a tunnel interior, an underground road, an underground shopping area, Especially, as the length of tunnels becomes very long and the number of underground cities and underground roads without cars on the ground increase, reception of satellite signals in Indoor environment must be solved.

Indoor satellite signal transmitter techniques such as U.S. Pat. No. 95,181,001 are known to solve this problem. However, these techniques propagate satellite signals received from an external source among transmitters in an indoor environment, and errors are accumulated in a plurality of stages of propagation, thereby causing a problem in accurate position tracking. Also, as disclosed in U.S. Patent No. 8207890, there is known a method of reducing the satellite orbit information amount, and a method in which a user receiver directly accesses a mobile communication network and receives satellite information, such as Korean Patent Registration No. 1322561, Conventional (or general) satellite signal receivers that do not have an upgrade or do not have a wireless communication modem still have a problem in receiving satellite signals in Indian language environments.

US 9518001 B2. US 8207890 B2. KR 1322561 B1.

SUMMARY OF THE INVENTION The present invention has been made to solve the problems of the prior art, and it is an object of the present invention to provide a method, apparatus and system for transmitting a satellite signal so that a satellite signal receiver can receive a satellite signal .

According to an aspect of the present invention, there is provided an indoor satellite signal transmitting apparatus including: a wireless communication unit for receiving first satellite information and time information from a satellite position information server through a wireless communication network; A satellite information updating unit for updating the first satellite information based on the location information of the place where the indoor satellite signal transmitting apparatus is installed and the received time information to generate second satellite information; And a satellite signal transmitting unit for transmitting the generated second satellite information on a carrier wave, wherein the first satellite information is information indicating that the satellite positioning information server, which is connected to the base station, Wherein the information is information provided by an indoor satellite signal transmitting apparatus.

The location information may be information determined based on a spatial positional difference from the base station to a place where the indoor satellite signal transmitting apparatus is installed, or may be a spatial absolute position of a place where the indoor satellite signal transmitting apparatus is installed.

The received time information may include absolute time information of the base station or a time difference (delta time) required for communication with the satellite position information server.

Wherein the satellite information updating unit extracts information including almanac, ephemeris, or clock correction data from the first satellite information, and based on the position information and the received time information, The extracted information can be updated.

The format of the second satellite information may be the same as the format of the first satellite information.

According to another preferred embodiment of the present invention, there is provided an indoor satellite signal transmitting apparatus comprising: a processor for receiving first satellite information and time information from a satellite position information server through a wireless communication network; And a memory for storing the received first satellite information, wherein the processor updates the first satellite information based on position information of a place where the indoor satellite signal transmitting apparatus is installed and the received time information The second satellite information is generated and transmitted on a carrier wave, and the first satellite information is acquired by the satellite position information server connected to the base station, the information being received from the satellite by the base station Wherein the information is information that provides the indoor satellite signal.

The satellite signal processing implemented in the processor may operate as an assisted GPS (GPS).

The wireless communication processing and satellite signal processing implemented in the processor may be implemented in a multiplexing fashion such that the satellite signal processing is performed in a DRX (Discontinuous Reception) interval of the wireless communication processing.

The location information may be information determined based on a spatial positional difference from the base station to a place where the indoor satellite signal transmitting apparatus is installed, or may be a spatial absolute position of a place where the indoor satellite signal transmitting apparatus is installed.

The received time information may include absolute time information of the base station or a time difference required for communication with the satellite position information server.

The processor may extract information including almanac, ephemeris, or clock correction data from the first satellite information, and may update the extracted information based on the location information and the received time information.

The format of the second satellite information may be the same as the format of the first satellite information.

According to another aspect of the present invention, there is provided a method for transmitting satellite signals of an Indoor satellite signal transmitting apparatus, the method comprising: receiving first satellite information and time information from a satellite position information server through a wireless communication network; Receiving; A satellite information updating step of updating the first satellite information based on the location information of the place where the indoor satellite signal transmitting device is installed and the received time information to generate second satellite information; And transmitting the generated second satellite information on a carrier wave, wherein the first satellite information is information collected by the satellite position information server connected to the base station, the information being received from the satellite by the base station A method of transmitting an Indoor satellite signal is provided.

The location information may be information determined based on a spatial positional difference from the base station to a place where the indoor satellite signal transmitting apparatus is installed, or may be a spatial absolute position of a place where the indoor satellite signal transmitting apparatus is installed.

The received time information may include absolute time information of the base station or a time difference required for communication with the satellite position information server.

The satellite information updating step may include extracting information including almanac, ephemeris, or clock correction data from the first satellite information; And updating the extracted information based on the position information and the received time information.

The format of the second satellite information may be the same as the format of the first satellite information.

According to another embodiment, there is provided a computer program stored in a recording medium, which is set up for executing the Indoor satellite signal transmission method according to each of the above-described methods.

According to another embodiment, there is provided a computer-readable recording medium on which the program is recorded.

The satellite signal processing included in the program may operate with assisted GPS.

The wireless communication processing and satellite signal processing included in the program may be implemented in a multiplexing manner such that the satellite signal processing is performed in the DRX interval of the wireless communication processing.

According to another aspect of the present invention, there is provided a satellite positioning system, comprising: a satellite position information server connected to a base station; And an Indoor satellite signal transmitting apparatus, wherein the Indoor satellite signal transmitting apparatus receives first satellite information and time information from the satellite position information server via a wireless communication network, The base station updates the first satellite information based on the position information and the received time information to generate second satellite information, and transmits the generated second satellite information on a carrier wave, Wherein the satellite signal is information received from a satellite.

The location information may be information determined based on a spatial positional difference from the base station to a place where the indoor satellite signal transmitting apparatus is installed, or may be a spatial absolute position of a place where the indoor satellite signal transmitting apparatus is installed.

The received time information may include absolute time information of the base station or a time difference required for communication with the satellite position information server.

The indoor satellite signal transmitting apparatus may extract information including almanac, ephemeris, and clock correction data from the first satellite information, and may update the extracted information based on the location information and the received time information .

The format of the second satellite information may be the same as the format of the first satellite information.

The satellite signal processing performed in the Indoor satellite signal transmitting apparatus can be operated by assisted GPS.

Wireless communication processing and satellite signal processing performed in the Indoor satellite signal transmitting apparatus can be implemented in a multiplexing manner such that the satellite signal processing is executed in the DRX interval of the wireless communication processing.

As described above, in order to transmit (or transmit) satellite signals in the Indian language environment, the method, apparatus, and system according to the present invention receive satellite information and time information from the wireless communication network to which the satellite positioning server is connected, So that the satellite signal receiver can receive the satellite signal without the need for a separate upgrade or additional device such as a wireless communication modem or the like, . That is, according to the present invention, if the apparatus is installed at any position or place that can be connected to the wireless communication network, the user can use the normal satellite signal receiver as it is. The advantage of using an assisted software satellite signal processing method is that it can be implemented in a single processor by multiplexing wireless communication processing and satellite signal processing.

1 is a diagram showing a base station and a satellite position information server receiving satellite signals.
2 is a diagram illustrating an Indoor satellite signal transmission system according to an embodiment of the present invention.
3 is a diagram illustrating an indoor satellite signal transmitting apparatus according to an embodiment of the present invention.
4 is a diagram illustrating a format of a navigation message included in a satellite signal transmitted from an indoor satellite signal transmitting apparatus according to an embodiment of the present invention.
5 is a diagram illustrating a process of generating a satellite signal transmitted by an Indoor satellite signal transmitting apparatus according to an embodiment of the present invention.
6 is a diagram showing an indoor satellite signal transmitting apparatus 10 according to another embodiment of the present invention.
7 is a flowchart showing a specific example of the Indoor satellite signal transmission method according to an embodiment of the present invention.
8 is a flowchart showing a specific example of a multiplexing method of the wireless communication processing and the satellite signal processing according to another embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily carry out the present invention. In the following description, only parts necessary for understanding the operation according to the embodiment of the present invention will be described, and descriptions of other parts are omitted so as not to obscure the gist of the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

In addition, terms and words used in the following description and claims should not be construed to be limited to ordinary or dictionary meanings, but are to be construed in a manner consistent with the technical idea of the present invention As well as the concept.

Throughout the specification, when a part is referred to as being "connected" to another part, it is not limited to the case where it is "directly connected," but is "electrically connected" . Also, when a part is referred to as "including " an element, it does not exclude other elements unless specifically stated otherwise.

For simplicity of explanation, one or more methods are shown and described herein as a series of steps, for example in the form of a flowchart or a flowchart, but the present invention is not limited by the order of the steps, As it can be done in a different order than that shown and described herein or concurrently with other steps. Furthermore, not all illustrated steps may have to be implemented in accordance with the present invention.

The present invention is a method, apparatus and system for transmitting indian satellite signals, in which many terms such as "Indian language", "satellite", "wireless communication" and the like are mentioned in detail. Indoor environment means a location, an area, an enclosed area where the satellite is not visible in the viewing angle, or the satellite signal is not received well. For example, the indoor environment, the tunnel interior, the underground road, But is not necessarily limited thereto. In addition, although the satellite is a kind of global satellite navigation system (GNSS) and is mainly described by taking GPS as an example, the present invention is not limited to GPS but includes all satellite systems such as GLONASS, Galileo, Beidou and QZSS.

In addition, wireless communication collectively refers to the names of mobile communication, cellular communication, WLAN (Wireless Local Area Network), and the like. In this specification, LTE (Long-Term Evolution) communication is mainly described by way of example. However, in addition to LTE, various 2G / 3G / 4G communication standards such as GSM, CDMA and WCDMA , Various variants or upgrades of these standards, and 5G, which are in the process of standardization, but are not necessarily limited thereto. Also, in one aspect, a WLAN that includes wireless communication may include an IEEE 802.11x network, but the claimed invention is not so limited.

1 is a diagram showing a base station and a satellite position information server receiving satellite signals. Referring to FIG. 1, a base station 31, a satellite position information server 30, and satellites 51, 52, 53 and 54 are shown.

The base station 31 may form a cell of a wireless communication network or a cellular communication and may receive satellite signals transmitted by a plurality of satellites 51, 52, 53 and 54. The term "base station" as referred to is meant to include any wireless communication station and / or device typically installed on the ground and is used to facilitate communication in a wireless communication system, such as a cellular network, Is not limited thereto. In another aspect, a base station may be included in any range of electronic device types. In an aspect, the base station may include, for example, a WLAN access point.

The satellite position information server 30 is called a satellite position information collection server or a satellite position providing server and collects, stores, and provides position information of satellites received from a plurality of satellites 51, 52, 53 and 54 in real time can do. The satellite position information server 30 is connected to the Internet and can provide satellite information in response to a satellite information request from a user terminal connected to the base station 31. Although four satellites are shown in the figure, more satellite information can be received. The server 30 may receive and lock the time information including the absolute time (or absolute time) received from the satellite.

The satellite signals transmitted by the satellites 51, 52, 53 and 54 will be described as examples of GPS satellites. The time and errors of the clocks mounted on the satellites, the satellite status information, the navigation message (see FIG. 4) including almanac, almanac, orbit information and history (ephemeris) of each satellite, and a coefficient for error correction is continuously transmitted at a rate of 50 bps. The orbit information and state (almanac) of all satellites contains orbit information that is maintained for a relatively long period of time for all GPS satellites, which takes 12.5 minutes to transmit completely. The orbit information and history of each satellite contains the orbit information of individual satellites updated every 2 hours from the control station on the ground and valid for 4 hours.

2 is a diagram illustrating an Indoor satellite signal transmission system according to an embodiment of the present invention. 2 shows a configuration of a base station 31, a satellite position information server 30, a plurality of indoor satellite signal transmitting apparatuses 10, a repeater 33, a connection 35 of a base station and a repeater, a user terminal 41, An Indoor environment 45, a wireless communication signal 37, a second satellite signal 55, and the like.

To avoid confusion of explanation, the first satellite information, the second satellite information, and the second satellite signal 55 are defined as follows.

The satellite information received by the base station 31 from the actual satellites 51, 52, 53 and 54 and transmitted through the satellite position information server 30 is referred to as first satellite information. Therefore, the first satellite information is included in the wireless communication signal 37 transmitted (or transmitted) by the base station 31 or the repeater 33.

The satellite information generated by updating the first satellite information received by the indoor satellite signal transmitting apparatus 10 is referred to as second satellite information.

A satellite signal that transmits (or sends) second satellite information generated by the indoor satellite signal transmitting apparatus 10 to a carrier wave is referred to as a second satellite signal 55.

Referring to FIG. 2, an indoor satellite signal transmission system according to an embodiment of the present invention includes a satellite position information server 30 and an indoor satellite signal transmission apparatus 10.

The satellite position information server 30 can communicate with the indoor satellite signal transmitting apparatus 10 via the wireless communication network 37. [ The wireless communication network can use the various communication standards described above.

Since the Indoor satellite signal transmitting apparatus 10 is in the Indoor environment 45, it may be difficult to directly communicate with the satellite position information server 30. In this case, it is also possible to perform wired / wireless communication through the repeater 33.

Mobile telecommunication or wireless carriers are investing in a lot of facilities and trying to expand their coverage so that communication problems do not occur even in Indian language (45). For example, a repeater 33 is installed and connected to the base station 31 on the ground by wire or other various wired / wireless means such as an optical cable to relay or amplify a communication signal to maximize communication and reception sensitivity We are working hard. In the case of the Republic of Korea, LTE communication is possible in almost all spaces where people or vehicles move. Accordingly, even if the indoor environment 45 is a space where a person or a vehicle can move, it can be said that the wireless communication 37 is finally possible through a wired / wireless repeater.

The indoor satellite signal transmitting apparatus 10 installed in the indoor environment 45 in the above-described manner can receive the first satellite information from the satellite position information server 30 via the wireless communication network 37 or via the repeater .

The indoor satellite signal transmitting apparatus 10 that has received the first satellite information can update the first satellite information as if it received satellite information from the actual satellite at the position where the present apparatus 10 is installed. This will be described later.

The second satellite information 55 transmitted by the indoor satellite signal transmitting apparatus 10 after updating the first satellite information and transmitted to the carrier wave includes the second satellite information. The second satellite information preferably has the same format as the first satellite information, but is not necessarily limited thereto. The indoor satellite signal transmitting apparatus 10 generates the second satellite signal 55 in the same manner as the actual satellite generates the signal, which will be described later.

The user terminal 41 may be, but is not necessarily limited to, a personal digital assistant equipped with a satellite signal receiving modem or a function, a satellite receiver, a computer, or the like. The illustrated vehicle 43 may be, but is not necessarily limited to, a satellite signal receiving modem of a vehicle or a telematics device equipped with a function or a navigation device in a vehicle.

In the Indian language environment 45, the user terminal 41 or the vehicle 43 may receive the second satellite signal 55 which is transmitted (or transmitted) by the indoor satellite signal transmitting apparatus 10. At this time, the satellite signal receiver of the user terminal 41 or the vehicle 43 may be a general satellite signal receiver normally used. No extra help is needed, such as special upgrades or special devices. The user terminal 41 or the vehicle 43 receives the second satellite signal 55 but does not feel any difference from receiving the satellite signal from the actual satellite. A plurality of indoor satellite signal transmitting apparatuses 10 may be installed in the indoor environment 45 depending on the magnitude of the transmission power.

The installed plurality of indoor satellite signal transmitting apparatuses 10 may generate different second satellite information because their installed positions are different from each other.

3 is a diagram showing an indoor satellite signal transmitting apparatus 10 according to an embodiment of the present invention.

3, an indoor satellite signal transmitting apparatus 10 according to an embodiment of the present invention may include a wireless communication unit 11, a satellite information updating unit 13, and a satellite signal transmitting unit 15 . The indoor satellite signal transmitting apparatus 10 may further comprise an antenna 17,

The wireless communication unit 11 can receive the first satellite information and the time information from the satellite position information server 30 through the wireless communication network 37. [ May receive information directly from the satellite position information server 30 via the wireless communication network 37 or may receive information via the repeater 33 or the like.

The first satellite information is information included in a satellite signal that the base station 31 actually receives from a plurality of satellites 51, 52, 53, and 54.

The time information may be absolute time (or absolute time, t) information. Absolute time information may be information received by the base station 31 from the satellite when locked with the satellite. It may also include a time difference (delta time,? T) or delayed time required for communication from the satellite position information server 30 to the indoor satellite signal transmitting apparatus 10. This time difference may be extracted from the satellite position information server 30 and based on the absolute time by the wireless communication unit 11. [

The satellite information updating unit 13 updates the first satellite information based on the location information of the place where the indoor satellite signal transmitting apparatus 10 is actually installed and the time information received by the wireless communication unit 11, Lt; / RTI >

The positional information p 'of the place where the indoor satellite signal transmitting apparatus 10 is installed is determined based on the spatial position difference? P from the position p where the base station 31 is installed to the place where the transmitting apparatus is installed Can be lost information. Alternatively, it may be a spatial absolute position (p ') of a place where the indoor satellite signal transmitting apparatus 10 is installed, and may be a known value.

In addition to the location information, an important identifier is the time (or time) information described above. The satellite information updating unit 13 extracts information including almanac, ephemeris or clock correction data and various parameters, which are satellite orbit related information, from the first satellite information, The second satellite information can be generated by updating the extracted information based on the position information and the time information.

If the first satellite information is S, it can be defined as the following equation (1).

S _n is the information of the nth satellite, and S includes all the n satellite information.

The information of the i-th satellite can be expressed by Equation (2).

In Equation (2), i is an identifier of a satellite, t is an absolute time at which the base station 30 receives the first satellite information, p is an absolute position of the base station 30, and O _i Related information and parameters at time t. That is, S _i can be represented by information dependent on i, O _i (t), t, and p.

If the second satellite information is S ', the following equation (3) and (4) can be defined.

In Equation (4), t 'is the absolute time at which the indoor satellite signal transmitting apparatus 10 receives the first satellite information, t' = t + Δt, and p 'is an absolute value of the indoor satellite signal transmitting apparatus 10 , P '= p + Δp, and O _i (t') may be orbital related information and parameters at time t 'of the i-th satellite.

Therefore, the first satellite information can be updated with the second satellite information based on t 'and p'. The second satellite information thus generated may be satellite information such as that actually received (if the satellite signal can be received) at the location where the indoor satellite signal transmitting apparatus 10 is installed.

The information estimated or calculated by the above-described method may be more accurate satellite information because the cumulative error due to propagation of various stages does not occur as in the conventional technique.

The satellite signal transmitting unit 15 can transmit (or transmit) the second satellite signal 55 by putting the second satellite information generated by the above-described method on the carrier wave. The format of the second satellite information is preferably the same as the format of the first satellite information so as to receive the second satellite information by a general satellite signal receiver normally used by the user. In this case, it is possible to receive the second satellite information without any additional assistance such as special upgrade or special device.

The user terminal 41 or the vehicle 43 receives the second satellite signal 55 containing the second satellite information but does not feel any difference from receiving the satellite signal from the actual satellite.

4 is a diagram showing a format 57 of a navigation message included in a second satellite signal 55 transmitted by the indoor satellite signal transmitting apparatus 10 according to an embodiment of the present invention. Signal as an example. In the case of using GPS satellites, it is preferable that both the first satellite information and the second satellite information represent the same navigation message format 57.

The SV (space vehicle) clock correction amount (or clock correction information) is transmitted in the first subframe, and the precise satellite orbit data ephemeris for the transmitting satellite is transmitted in the second and third subframes. The fourth and fifth subframes are used for other page transmission of the system data. Each subframe includes a telemetry word (TLM) and a handover word (HOW). The entire set of 25 frames (125 subframes) constitutes a complete navigation message, transmitted in a 12.5-minute cycle. A data frame (1,500 bits) is sent every 30 seconds. Each frame consists of five subframes. The data bit subframe (300 bits transmitted for 6 seconds) contains data parity bits for data checking and limited error correction.

The satellite information update unit 13 may update the various types of information according to Equation 3 and Equation 4 based on the position information and time information of the Indoor satellite signal transmission apparatus 10. [

5 is a diagram illustrating a process of generating a second satellite signal 55 transmitted by the indoor satellite signal transmitting apparatus 10 according to an embodiment of the present invention, which is an example of a GPS satellite signal.

The satellite signal transmitter 15 transmits the updated satellite message 55 to the carrier wave (or transmission frequency) together with the C / A code (Coarse / Acquisition code or Standard code) can do.

The carrier generator 61 generates a carrier wave L1 (1,575.42 MHz). The navigation signal 65 is a phase shift keying (PSK) signal including a 50 bps navigation message 57 and spread spectrum modulated with a pseudorandom noise code (PRN code) 63.

6 is a diagram showing an indoor satellite signal transmitting apparatus 10 according to another preferred embodiment of the present invention.

Referring to FIG. 6, an indoor satellite signal transmitting apparatus 10 according to another embodiment of the present invention may include a processor 21 and a memory 23. It is also possible to further comprise an RF unit 25 and / or an antenna 27. [

The difference between the configuration of FIG. 3 and the configuration of FIG. 6 is that processing related to wireless communication and satellite information can be implemented in a processor 21 by a multiplexing method, and a multiplexing method will be described with reference to FIG. 8 . The parts already described in Fig. 3 will be omitted.

Processor 21 may be, but is not necessarily limited to, a modem processor, an LTE system-on-chip (SoC), a DSP, a CPU, a microcontroller, a microprocessor, or an application processor.

The processor 21 may receive the first satellite information and the time information from the satellite position information server 30 via the wireless communication network. Also, the second satellite information can be generated by updating the first satellite information based on the position information of the actually installed place of the indoor satellite signal transmitting apparatus 10 and the received time information. It is also possible to control the second satellite information 55 to be generated and transmitted by loading the second satellite information on the carrier wave.

The memory 23 is connected to the processor 21 and can be divided into a program memory area for storing processing instructions and a data memory area for storing data. The memory 23 may store the first satellite information and / or the second satellite information.

The processor 21 and the memory 23 may be configured separately, and may be embedded in the same chip or SoC, but the present invention is not limited thereto.

The RF unit 25 may be connected to the antenna 27, may communicate with the wireless communication network, and may transmit the second satellite information on a carrier wave. The RF unit 25 may include an ADC and a DAC capable of sampling and digitizing an RF signal or converting a digital signal into an RF signal.

Preferably, a single broadband antenna 27 may be used for wireless communication and satellite signal transmission, but a separate antenna may be used, but the present invention is not limited thereto.

7 is a flowchart (S70) showing a concrete example of a method for transmitting Indoor satellite signals according to an embodiment of the present invention.

Referring to FIG. 7, step S71 shows a state in which the indoor satellite signal transmitting apparatus 10 is transmitting (or transmitting) the second satellite signal 55. FIG.

In step S73, the first satellite information and the time information can be received from the satellite position information server 30 through the wireless communication network. The indoor satellite signal transmitting apparatus 10 may request the first satellite information to the satellite position information server 30 every 2 to 4 hours.

When a new navigation message (or first satellite information) is received, data and parameters can be extracted and stored in the received navigation message (S75).

In step S76, the second satellite information can be generated by updating the first satellite information based on the location information of the place where the indoor satellite signal transmitting apparatus 10 is installed and the received time information.

In step S77, the second satellite information may be configured as the navigation message format of FIG.

In step S79, the navigation message (or the second satellite information) generated in step S77 may be exclusive-ORed with the C / A code as shown in FIG. 5 and may be transmitted on the carrier wave to generate the second satellite signal 55. FIG.

In step S71, the generated second satellite signal 55 can be transmitted.

FIG. 8 is a flowchart (S80) showing a specific example of a multiplexing method of the wireless communication processing and the satellite signal processing according to another embodiment of the present invention. In the present embodiment, LTE is used as an example of a wireless communication system and a GPS satellite signal is exemplarily described. However, the present invention is not limited to this.

The GPS signal processing (GPS processing) executed in the processor 21 can operate as assisted GPS (assisted GPS).

GPS is a stand-alone system and an assist system, and a system widely used in the past is a stand-alone system. The stand-alone method is a method of accessing satellites directly in order to acquire the position information of the satellites. In general, it takes about 20 to 200 seconds to access the satellites because the satellites send the satellite position information slowly. On the other hand, since the assisted GPS receives the satellite orbit information of the point and the point from the satellite position information server 30 through the LTE network based on the information of the mobile communication base station 31, You can get it much faster (usually takes 1-10 seconds).

And, the use of software-based GPS can increase the versatility, flexibility, and scalability of operation because it is executed as an instruction from a general-purpose processor (DSP or CPU) instead of conventional GPS-only hardware.

Further, the wireless communication processing and the processing of the satellite signal executed in the processor 21 can be implemented in a multiplex manner, in which the satellite signal processing is executed in a DRX (Discontinuous Reception) interval of wireless communication processing have.

The DRX interval is a communication protocol used to reduce the power consumption of the wireless communication device. The duty ratio of the DRX section versus the paging section varies depending on the situation, but it is a very important feature to reduce the power consumption of the radio communication apparatus because it is a value of several tens of minutes to thousands of days.

Paging is a series of procedures for a base station to transmit an acknowledgment to a wireless communication device at a specific time point in order to resume data transmission and reception when there is incoming data, . The time (paging interval) required to execute the paging is usually 1 msec to 3 msec.

Paging repeats regularly, and the time interval between paging and next paging is the DRX interval. This time interval is predetermined for the base station and the wireless communication device, and each DRX interval is generally guaranteed at the same time interval, and a value between 0.5 seconds and 10 seconds is often used. DRX can be divided into various types: connected DRX (within 1 second when sending and receiving data and data), idle DRX (within 2.56 seconds), enhanced DRX (more than 2 seconds), PSM (power save mode , And the minimum and maximum values are defined in the communication protocol.

8, when the LTE network is searched (S81) in the indoor satellite signal transmitting apparatus 10, an attempt to attach to the network cell (S82) may be made to connect to the LTE network (S83).

If there is no data traffic, the indoor satellite signal transmitting apparatus 10 may enter the DRX interval to repeat the paging periodically (S84).

When entering the DRX interval, GPS processing (satellite signal processing) is performed before the DRX interval ends (S85). The GPS processing may include processing such as reception and update of first satellite information, generation and transmission of second satellite information, and the like.

When the DRX interval ends (S86), the paging processing of the LTE can be executed (S87).

In step S88, it is determined whether the wireless communication network connection is terminated or data traffic is started. If the wireless communication network connection is terminated or the data traffic starts, the paging is terminated.

As described above, according to the present embodiments, in order to transmit a satellite signal in an Indian language environment, the apparatus 10 according to the present invention receives satellite information and time information from a satellite position information server via a wireless communication network, A new satellite signal is generated and transmitted based on the precise position information of the position where the apparatus is mounted so that a normal satellite signal receiver used by the user can receive a satellite signal without any additional upgrade or additional apparatus such as a wireless communication modem There is an effect to be able to do. That is, according to the present invention, if the device 10 is installed at any position or place where the wireless communication network can be connected, the user can use the conventional satellite signal receiver as it is. In addition, there is an advantage that an assisted software satellite signal processing method is used, and wireless communication processing and satellite signal processing are multiplexed to be implemented in one processor.

Embodiments of the Indoor satellite signal transmission method described above may be implemented in the form of program instructions that may be executed through various computer components and recorded in a computer-readable recording medium. The recording medium mentioned above may be, but is not necessarily, a ROM, a magnetic disk or a compact disk, an optical disk, or the like.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, . Accordingly, the true scope of the present invention should be determined by the technical idea of the appended claims.

10: Indoor satellite signal transmitter
11:
13: Satellite information update unit
15: satellite signal transmitter
17, 19, 27: antenna
21: Processor
23: Memory
25: RF section
30: satellite position information server
31: base station
33: Repeater
35: Connection between relay station and relay station
37: Wireless communication network
41: User satellite reception terminal
43: Vehicle telematics or satellite receiver
45: Indian environment
51, 52, 53, 54: satellites
55: second satellite signal
57: Navigation message format
61: Carrier generator
63: PRN generator
65: Navigation messages

Claims (28)

An indoor satellite signal transmitting apparatus comprising:
A wireless communication unit for receiving first satellite information and time information from a satellite position information server through a wireless communication network;
A satellite information updating unit for updating the first satellite information based on the location information of the place where the indoor satellite signal transmitting apparatus is installed and the received time information to generate second satellite information; And
And a satellite signal transmitter for transmitting the generated second satellite information on a carrier wave,
Wherein the first satellite information is information collected by the satellite position information server connected to the base station, the information being received from the satellite by the base station.
The method according to claim 1,
Wherein the location information is information determined based on a spatial positional difference from the base station to a place where the indoor satellite signal transmitting apparatus is installed or is a spatial absolute position of a place where the indoor satellite signal transmitting apparatus is installed , Indoor satellite signal transmitting device.
The method according to claim 1,
Wherein the received time information includes absolute time information of the base station or delta time required for communication with the satellite position information server.
The method according to claim 1,
Wherein the satellite information updating unit extracts information including almanac, ephemeris, or clock correction data from the first satellite information, and based on the position information and the received time information, And updates the extracted information.
The method according to claim 1,
Wherein the format of the second satellite information is of the same format as the format of the first satellite information.
An indoor satellite signal transmitting apparatus comprising:
A processor for receiving first satellite information and time information from a satellite location information server via a wireless communication network; And
And a memory for storing the received first satellite information,
The processor comprising:
The first satellite information is updated based on the location information of the place where the indoor satellite signal transmitting apparatus is installed and the received time information to generate second satellite information,
Controls to transmit the generated second satellite information on a carrier wave,
Wherein the first satellite information is information collected by the satellite position information server connected to the base station, the information being received from the satellite by the base station.
The method according to claim 6,
Characterized in that the satellite signal processing carried out in the processor operates with assisted GPS (GPS).
The method according to claim 6,
The wireless communication processing and the satellite signal processing, executed in the processor,
Wherein the satellite signal processing is implemented in a multiplex manner such that the satellite signal processing is performed in a DRX (Discontinuous Reception) interval of the wireless communication processing.
The method according to claim 6,
Wherein the location information is information determined based on a spatial positional difference from the base station to a place where the indoor satellite signal transmitting apparatus is installed or is a spatial absolute position of a place where the indoor satellite signal transmitting apparatus is installed , Indoor satellite signal transmitting device.
The method according to claim 6,
Wherein the received time information includes absolute time information of the base station or a time difference required for communication with the satellite position information server.
The method according to claim 6,
Wherein the processor extracts information including almanac, ephemeris, or clock correction data from the first satellite information, and updates the extracted information based on the positional information and the received time information. Satellite signal transmission device.
The method according to claim 6,
Wherein the format of the second satellite information is of the same format as the format of the first satellite information.
A method for transmitting satellite signals of an Indoor satellite signal transmitting apparatus,
Receiving first satellite information and time information from a satellite location information server over a wireless communication network;
A satellite information updating step of updating the first satellite information based on the location information of the place where the indoor satellite signal transmitting device is installed and the received time information to generate second satellite information; And
And transmitting the generated second satellite information on a carrier wave,
Wherein the first satellite information is information collected by the satellite position information server connected to the base station, the information being received from the satellite by the base station.
14. The method of claim 13,
Wherein the location information is information determined based on a spatial positional difference from the base station to a place where the indoor satellite signal transmitting apparatus is installed or is a spatial absolute position of a place where the indoor satellite signal transmitting apparatus is installed , Indoor satellite signal transmission method.
14. The method of claim 13,
Wherein the received time information includes absolute time information of the base station or time difference required for communication with the satellite position information server.
14. The method of claim 13,
The satellite information update step includes:
Extracting information including almanac, ephemeris, or clock correction data from the first satellite information; And
And updating the extracted information based on the location information and the received time information.
14. The method of claim 13,
Wherein the format of the second satellite information is of the same format as the format of the first satellite information.
A computer program stored on a recording medium, set for carrying out a method of transmitting an Indoor satellite signal, according to any one of claims 13 to 17.
A computer-readable recording medium on which the program of claim 18 is recorded.
19. The method of claim 18,
Characterized in that the satellite signal processing included in the program operates with assisted GPS.
19. The method of claim 18,
The wireless communication processing and satellite signal processing,
Wherein the satellite signal processing is implemented in a multiplexing manner such that the satellite signal processing is performed in a DRX interval of the wireless communication processing.
A satellite location information server connected to the base station; And
An indoor satellite signal transmitting device,
The indoor satellite signal transmitting apparatus includes:
Receiving first satellite information and time information from the satellite position information server via a wireless communication network,
The first satellite information is updated based on the location information of the place where the indoor satellite signal transmitting apparatus is installed and the received time information to generate second satellite information,
Transmits the generated second satellite information on a carrier wave,
And the first satellite information is information received from the satellite by the base station.
23. The method of claim 22,
Wherein the location information is information determined based on a spatial positional difference from the base station to a place where the indoor satellite signal transmitting apparatus is installed or is a spatial absolute position of a place where the indoor satellite signal transmitting apparatus is installed , Indoor satellite signal transmission system.
23. The method of claim 22,
Wherein the received time information includes absolute time information of the base station or time difference required for communication with the satellite position information server.
23. The method of claim 22,
The indoor satellite signal transmitting apparatus extracts information including almanac, ephemeris, and clock correction data from the first satellite information, and updates the extracted information based on the location information and the received time information To the indoor satellite signal transmission system.
23. The method of claim 22,
Wherein the format of the second satellite information is of the same format as the format of the first satellite information.
23. The method of claim 22,
Wherein the satellite signal processing executed in the Indoor satellite signal transmitting apparatus operates with an assisted GPS.
23. The method of claim 22,
The wireless communication processing and the satellite signal processing, which are executed in the Indoor satellite signal transmitting apparatus,
Wherein said satellite signal processing is implemented in a multiplexing manner such that said satellite signal processing is performed in a DRX interval of said wireless communication processing.

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