KR100298354B1 - Method for providing time information for base station controller in cellular system and thereof application method - Google Patents

Abstract

The present invention relates to a method of supplying and utilizing time information (TOD) received from a GPS satellite to a vocoder of a base station controller in a cellular communication system using a code division multiple access technology, wherein the GPS receiver receives absolute time information from the satellite. By generating time information and a clock, the clock supplier provides the time information to the vocoder through a clock supply cable. The vocoder then records the time information in a compressed packet so that the receiving end can identify the lost packet. As another example, a packetization processor packetizes time information received from a clock supply and a packet router routes the packetized time information to a vocoder.

As a result, the present invention can utilize the time information received from the GPS receiver in the vocoder and can prevent the loss of packets transmitted by the vocoder to improve the handoff success rate.

Description

FIELD OF PROVIDING TIME INFORMATION FOR BASE STATION CONTROLLER IN CELLULAR SYSTEM AND THEREOF APPLICATION METHOD}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cellular system, and more particularly, to a base station controller for time of date (TOD) received from a satellite in a cellular communication system using a code division multiple access (CDMA) technique. The present invention relates to a device and a method for supplying and utilizing a Vocoder.

The cellular mobile communication system divides the entire service area into a plurality of base station (BS) areas to form cells, which are small service areas, and centrally controls these base stations to the mobile switching center, thereby allowing subscribers to It allows you to continue the call while moving.

1 is a block diagram of a cellular system using a conventional code division multiple access technique, as shown in FIG. 1, a plurality of base station transceivers providing communication services to a mobile telephone (MT) 40. Subsystem: BTS (30) (31), the base station controller (BSC) 20 and the base station controller 20 for controlling a plurality of base stations (30) (31) Public Switched Telephone Network (Public Switched Telephone Network) Network: Mobile Switching Center (MSC) 10 to connect to the PSTN (11).

The cellular system configured as described above maintains a call by providing a handoff function when a mobile phone in a call leaves the area of one base station and enters the area of another base station, and the handoff is performed by the base station controller. . Since the base stations must all be synchronized at the same time in order for the call of the mobile phone to be maintained well during the handoff, each base station is synchronized with the clock and the time information received from the Global Positioning System (GPS) satellite. For this purpose, the base station and the base station controller each have a GPS receiver, and the GPS receiver provides time information and a clock to the base station and the base station controller. However, in a typical cellular system, the base station uses the time information for handoff and the like, while the base station controller only uses the time information received from the GPS satellites to provide GPS state management to the network management block. That is, in the prior art operating as described above, there is a problem that the base station controller does not provide a method for receiving time information and utilizing it for communication with the base station.

Therefore, an object of the present invention, which was devised to solve the problems of the prior art operating as described above, provides time information received from a GPS satellite to a vocoder of a base station controller to share a packet transmission time between the base station and the base station controller To provide a time information supply device and time information utilization method for a base station controller in a cellular system.

Other objects and advantages of the present invention will become more apparent from the following detailed description of the invention and the accompanying drawings.

A preferred embodiment of a time information supply device for a base station controller in a cellular system according to the present invention, which is designed to achieve the above object, in the base station controller of the cellular system,

A Global Positioning System (GPS) receiver which receives universal time information from a satellite and generates time information (TOD) and a clock;

A clock supply for receiving the time information from a GPS receiver;

A clock supply cable connecting the clock supply to a vocoder;

And a communication device receiving the time information through the clock supply cable and using the same for communication.

Another preferred embodiment of a time information supply apparatus for a base station controller in a cellular system according to the present invention, which is designed to achieve the above object, in the base station controller of the cellular system,

A GPS receiver for receiving absolute time information from a satellite and generating time information and a clock;

A clock supply for receiving the time information from a GPS receiver;

A packetization processor configured to receive and packetize time information from the clock supplier;

A packet router broadcasting the packetized time information;

And a communication device receiving the packetized time information through the packet router and using the same for communication.

In order to achieve the above object, a preferred embodiment of the present invention is a time information supply apparatus for a base station controller in a cellular system,

A Global Positioning System (GPS) receiver which receives universal time information from a satellite and generates time information (TOD) and a clock;

A clock supply for receiving the time information from a GPS receiver;

A clock supply cable connected to the clock supply; And

And a vocoder for receiving the time information through the clock supply cable and recording the time information in the compressed packet so that the receiving end can identify the lost packet.

Another preferred embodiment of the present invention is a time information supply apparatus for a base station controller in a cellular system,

A GPS receiver for receiving absolute time information from a satellite and generating time information and a clock;

A clock supply for receiving the time information from a GPS receiver;

A packetization processor configured to receive and packetize time information from the clock supplier;

A packet router for broadcasting the packetized time information; And

And a vocoder for receiving the packetized time information through the packet router and recording the time information in the compressed packet so that the receiving end can identify the lost packet.

1 is a block diagram of a cellular system using a conventional code division multiple access technique.

Figure 2 is an embodiment of a schematic diagram of a time information supply apparatus according to the present invention.

Figure 3 is another embodiment of the configuration of a time information supply apparatus according to the present invention.

4 is a flowchart of an embodiment of a time information utilization method according to the present invention;

Hereinafter, with reference to the accompanying drawings will be described in detail the operating principle of the preferred embodiment of the present invention.

The present invention relates to an apparatus for utilizing time information in communication between a base station and a base station controller by providing time information received from a GPS receiver to a vocoder in a base station controller.

In a cellular system, a base station controller includes a call control and a voice coding unit for controlling a plurality of base stations, and includes a path matching between a mobile switching center and a base station, soft handoff power control, and interconversion between voice modulation schemes (PCM, Q-CELP). Transcoding), echo cancellation, call processing for mobile phones, mobility management, base station matching and management, and self-operation maintenance. For the above functions, the voice coding unit of the base station controller has a vocoder for compressing or reconstructing a signal transmitted from the base station or the mobile switching center.

The system clock supply of the base station controller may provide the time information received by the GPS receiver directly to the vocoder via a cable, or may be packetized by a processor and then transmitted through a packet router. In the case of direct delivery over a cable, the vocoder is already connected to the clock supply via a clock supply cable that provides the clock, so that the clock supply can deliver both time information and the clock simultaneously through the existing clock supply cable. In addition, when passing through a packet router, the clock supplier may provide time information to each processor requiring a vocoder block or time information through the router.

Figure 2 shows an embodiment of the configuration of the time information supply apparatus according to the present invention, as shown, generating the time information and the clock by receiving the same universal time (Universal Time) from the GPS satellites worldwide GPS receivers 110 and 120, a clock supplier 130 for receiving time information from the GPS receivers 110 and 120, a clock supply cable 140 connected to the clock supply 130, and the clock supply cable It is composed of at least a plurality of vocoder 150, 160 receives the time information through the 140, the operation and effects thereof will be described in detail as follows.

In a cellular mobile communication system, synchronization between each system (base station, base station controller) is very important, so each system usually has a redundant GPS receiver. As shown in FIG. 2, if the first GPS receiver 110 and the second GPS receiver 120 are redundant and the first GPS receiver 110 is active, the second GPS receiver 120 Operates to Standby. The first and second GPS receivers 110 and 120 receive absolute time information from the GPS satellites to generate time information and a clock. If an abnormality occurs in the active GPS receiver, the standby GPS receiver is active and the active GPS receiver is switched to standby.

The clock supplier 130 receives time information from active and standby GPS receivers and selects time information received from an active GPS receiver (first GPS receiver), thereby requiring a communication device, that is, a vocoder 150 or 160. To pass). At this time, the clock supplier 130 simultaneously supplies time information and a clock to the vocoder 150 and 160 through the clock supply cable 140 used to supply the clock to the vocoder 150 and 160. Vocoder 150, 160 packetizes the voice using the received time information.

In addition, Figure 3 shows another embodiment of the configuration of the time information supply apparatus according to the present invention, as shown, GPS receiver 110, 120 for generating the time information and the clock by receiving the absolute time information from the satellite And a clock supplier 130 for receiving time information from the GPS receiver 110 and 120, a packetization processor 180 for packetizing time information received from the clock supplier 130, and the packetized time information. Packet router 190 for delivering a plurality of paths, vocoder 150 and 160 receiving packetized time information through the packet router 190, and packetized time information through the packet router 190. It is configured as another processor 170, the operation and effects thereof are described in detail as follows.

The clock supplier 130 selects time information received from the active GPS receiver and transmits the time information to the packetization processor 180. The packetization processor 180 processes the transmitted time information into a high-level Data Link Control (HDLC) packet and delivers the time information to the packet router 190. The packet router 190 broadcasts the processed packet to devices that need time information. In the case of FIG. 3, the packet router delivers the processed packet to a plurality of vocoders 150 and 160 and other processors 170. The vocoder 150, 160 and the processor 170 extract time information from the transmitted packet and use it for communication.

As shown in Figs. 2 and 3, clock supply 130 transmits a selector 132 for selecting time information and clocks transmitted from an active or standby GPS receiver, and transmits the selected time information and clocks to a vocoder or other processor. It is composed of an output driver 134, and delivers the selected time information to the desired devices.

Then, the devices that want the time information can use the received time information for communication to perform more efficient communication. For example, the vocoder may record and send time information in 20 ms intervals to a packet compressed in 20 ms units using the supplied time information. The recorded time information enables the receiving end to determine whether the voice packet and the data packet are lost.

4 is a flowchart of an embodiment of a method of utilizing time information according to the present invention, as shown in FIG. 4, when the GPS receiver of the base station controller generates time information and a clock in step S110, the clock supplier in step S120. The generated time information is transmitted to the vocoder through a clock supply cable or a packetization processor and a packet router. In step s130, the vocoder records and transmits time information using the time information in the compressed packet, and in step s140, the receiving end determines whether there is a lost packet in the middle through the time information recorded in the packet. do. Therefore, the base station controller can provide more reliable communication.

As described in detail above, the present invention may utilize time information by supplying time information received from a GPS receiver to desired devices in a base station controller of a cellular system using a code division multiple access technology. By supplying the signal, the packet transmission time is shared between the base station and the base station control period, thereby improving the handoff success rate.

Claims (4)

A time information supply apparatus for a base station controller in a cellular system, A Global Positioning System (GPS) receiver for generating a time of date (TOD) and a clock by using universal time information received from a satellite; A clock supplier for receiving the time information from the GPS receiver; A clock supply cable connected to the clock supply; And a vocoder which receives the time information through the clock supply cable and records time information in a compressed packet so that a receiving end can identify a lost packet. A time information supply apparatus for a base station controller in a cellular system, A GPS receiver for generating time information and a clock using absolute time information received from a satellite; A clock supplier for receiving the time information from the GPS receiver; A packetization processor configured to receive and packetize time information from the clock supplier; A packet router for broadcasting the packetized time information; And a vocoder for receiving the packetized time information through the packet router and recording the time information in the compressed packet so that the receiving end can identify the lost packet. A method of using time information for a base station controller in a cellular system, Generating, by the GPS receiver of the base station controller, time information and a clock; Transferring the generated time information to a vocoder; Recording the time information in a packet compressed by the vocoder; And determining whether there is a lost packet in the middle by using time information recorded in the packet at a receiving end. The method of claim 3, wherein the recording of the time information comprises recording the time information at which the packet is compressed in the vocoder at intervals.