KR100398346B1 - CDMA Systems and Service Methods based on a Cellular Phone with Multiple Baseband Receivers - Google Patents

Abstract

The present invention relates to a terminal comprising an additional secondary CDMA modem in addition to a primary CDMA modem capable of communicating in a system consisting of an existing CDMA base station, and to a system and accompanying services configured accordingly. The performing base station may be a primary base station for one cell area or a secondary base station for a certain area in the area. Here, the primary base station is a CDMA base station in a mobile communication system that communicates with a terminal located in a cell area by using a communication channel including a paging channel, and the secondary base station is located in a predetermined area and uses the same frequency as the existing CDMA base station. As a base station using the same PN sequence having a different PN sequence offset or a different PN sequence, it is possible to provide a service accompanying an existing system through a secondary CDMA modem of a terminal.

According to the present invention, while using most of the hardware and software used in the existing CDMA terminal as it is, by using a separate channel provided by the auxiliary modem to accommodate the paging channel indication function to reduce the power consumption of the terminal or wireless private switch, By accommodating an interworking function with a separate network device in a zone such as a local base station, it is possible to perform a communication service and a zone-specific information service in a zone.

Description

CDMA systems and service methods using a mobile communication terminal having a plurality of baseband receivers {CDMA Systems and Service Methods based on a Cellular Phone with Multiple Baseband Receivers}

The present invention relates to a CDMA mobile communication system comprising a base station for one cell area and an auxiliary base station for a certain area within the area, a terminal that can be used in the system, and a service through the same.

The current CDMA mobile communication terminal transmits and receives information with one base station at a time, and when transmitting and receiving information simultaneously with two or more base stations, it is limited to the same information during soft handoff. In this case, handoff refers to a function of automatically accessing an empty channel in a destination cell so that a call is not disconnected even if the terminal moves from a currently serving cell area to another destination cell area. If you move to a cell region, you maintain the call through several adjacent cells, including the serving cell and the destination cell, and if you leave the area of the cell that you were previously serving, stop the call from this cell and call from the destination cell that is already connected. Means a lasting function. Therefore, when a CDMA mobile communication terminal transmits and receives information simultaneously with several base stations, it is during soft handoff and transmits and receives the same information as a period for maintaining a call.

Current CDMA mobile terminals repeat periodic sleep and wake up operations to save power. That is, the terminal operates the RF unit (radio transmitter and receiver) and modem to monitor the paging channel only during the paging slot allocated to the terminal in the idle state, and saves power by shutting off the power of the terminal hardware including the RF unit during other periods. do. Therefore, if the terminal receives information during the corresponding paging slot and the paging is confirmed, the terminal performs the follow-up procedure accordingly. However, since the paging should be checked using only one channel, unnecessary information is not available during the corresponding slot even if there is no paging. Should continue to receive. In order to block the reception of such information and further reduce power, a separate channel for determining whether the terminal itself is paging is required, but the existing terminal does not provide it.

In other words, as the penetration rate of the terminal increases, the necessity of using the terminal as a main tool for communication and personal information is increasing, so that the terminal may perform information with two or more base stations in order to perform a separate service in addition to the normal CDMA mobile communication service according to the situation. As well as a technology that can enable the transmission and reception of the terminal, a technology for maintaining the power of the terminal for a long time is also required.

Also, with the development of communication technology, the necessary information can be easily and conveniently obtained, and the value of the information is more than the value of the existing goods. It is big. Although there is an increasing need for a method of providing information at a suitable time and place or a device capable of realizing the information, simple voice information and text information services provided by mobile communication are currently performed regardless of the location of the subscriber. The importance of adequate time and space has not been fully considered, and as such, they cannot provide services that meet the needs of subscribers.

The technical problem to be achieved by the present invention is a terminal that can reduce the power consumption of the terminal by receiving the paging channel indication information using a separate channel in addition to the paging channel used in the existing CDMA terminal and blocking the reception of unnecessary paging information according to this instruction And to implement the method.

Another technical problem to be solved by the present invention is to implement a system, a terminal, and a method for providing a wired / wireless communication service in a zone by using a secondary CDMA modem having a wireless private exchange which is a secondary base station in a predetermined zone in an existing CDMA system. will be.

Another technical problem to be achieved by the present invention is to implement a system, a terminal, and a method capable of providing information service for each zone by using a secondary CDMA modem with a local base station, which is a secondary base station, in a predetermined region of an existing CDMA system.

1 illustrates an example of a CDMA mobile communication system including a base station 100 for one cell area and secondary base stations 110 and 120 for a certain area in the area.

2 illustrates an example of an internal configuration of a CDMA mobile communication terminal having two CDMA modems according to the present invention.

3 shows an example flow of a method according to the present invention for reducing mobile terminal power.

4 illustrates an example of a method for performing communication using a secondary CDMA modem in a mobile communication system according to the present invention.

5 illustrates an example of a method for providing a local information service in a mobile communication system according to the present invention.

6 illustrates an example of a local information service method using the present invention mobile communication system.

According to the present invention for solving the above technical problem, a mobile communication terminal for transmitting and receiving signals with at least one mobile communication base station is connected to an antenna for performing a signal transmission and reception; A signal distribution unit for distributing the signal received by the RF unit to a primary modem and a secondary modem; A primary modem which achieves system synchronization and slot synchronization through the received signal, provides each synchronization information to a secondary modem, and receives a paging channel; A secondary modem matching slot synchronization with synchronization information provided from the primary modem, and receiving a paging indication channel capable of confirming paging as a channel different from the paging channel received by the primary modem; And a controller for shutting off a power of the RF unit and transitioning the terminal to a sleep state when there is no paging instruction in the paging instruction channel. In this case, the primary modem and the secondary modem may use the primary CDMA modem and the secondary CDMA modem, respectively.

According to the present invention for solving the above technical problem, a method of reducing power of a mobile communication terminal having a primary CDMA modem and a secondary CDMA modem to communicate with a wireless base station includes: Allocating to a modem and a secondary CDMA modem; (b) achieving system synchronization and slot synchronization through a signal received at the primary CDMA modem and initiating paging channel reception; (c) the secondary CDMA modem matching slot synchronization with the synchronization information of the primary CDMA modem and generating a wake up; (d) receiving a paging indication channel in the secondary CDMA modem to determine whether a paging indication is made to the terminal; And (e) transitioning the terminal to a sleep state if there is no paging instruction.

According to the present invention for solving the above other technical problem, a mobile communication terminal for transmitting and receiving a signal with at least one mobile communication base station is connected to an antenna for performing a signal transmission and reception; A main CDMA modem which encodes and decodes a signal to be transmitted to a predetermined mobile communication base station and a signal received by the RF unit using a first PN code; An auxiliary CDMA modem for performing decoding and encoding on signals received by the RF unit and signals to be transmitted to a predetermined mobile communication base station using a second PN code substantially different from a first PN code used in the primary CDMA modem; A signal synthesizing unit for synthesizing the signals encoded by the primary CDMA modem and the secondary CDMA modem, and delivering them to the RF unit; And a control unit for controlling selective use of the secondary CDMA modem and the primary CDMA modem.

In this case, the secondary CDMA modem may perform a communication through a communication channel including a paging channel and an access channel different from the main CDMA modem by synchronizing with a predetermined mobile communication base station using a second PN code. The second PN code may use the same PN sequence and different offsets as the first PN code.

According to another aspect of the present invention, there is provided a mobile communication system including: at least one wireless base station communicating with a mobile communication terminal located within a predetermined area by using a first PN code; And at least one secondary base station communicating with the mobile communication terminal located in a predetermined area of the predetermined area by using a second PN code substantially different from that used in the wireless base station. In this case, the second PN code is a PN code having the same PN sequence as the first PN code and a different offset, and the secondary base station may use a communication channel including a paging channel and an access channel different from that used by the wireless base station. The secondary base station may perform a function of a wireless private switch including an extension call origination function for a call with a terminal in the predetermined area.

According to the present invention for solving the above other technical problem, a mobile communication terminal having a primary CDMA modem and a secondary CDMA modem and communicating with a wireless base station via the primary CDMA modem is substantially the same as the PN code used by the wireless base station. A method of performing communication with a secondary base station serving as a wireless private exchange in a predetermined area through another PN code includes: (a) acquiring a pilot channel using a PN sequence of the secondary base station in an initialization state of the secondary CDMA modem; (b) the secondary CDMA modem obtaining a sink channel; (c) the secondary CDMA modem performing time conversion; (d) a secondary CDMA modem monitoring a call channel for communication with a mobile communication terminal located in the predetermined area; (e) If there is a call, the secondary CDMA modem may be characterized by including initiating communication on a call channel different from the call channel used by the wireless base station.

According to another aspect of the present invention, a mobile communication terminal for transmitting and receiving signals with at least one mobile communication base station includes: an RF unit connected to an antenna to perform signal transmission and reception; A main CDMA modem which encodes and decodes a signal to be transmitted to a predetermined mobile communication base station and a signal received by the RF unit using a first PN code; A secondary CDMA modem for decoding and encoding the signals received by the RF unit and the signals to be transmitted to a predetermined mobile communication base station using a second PN code substantially different from the first PN code used in the primary CDMA modem; A signal synthesizing unit for synthesizing the signals encoded by the primary CDMA modem and the secondary CDMA modem, and delivering them to the RF unit; And a control unit for controlling selective use of the secondary CDMA modem and the primary CDMA modem.

In this case, the control unit generates a restored clock using the frequency synchronization restored from the primary CDMA modem, controls the clock to be used by the primary CDMA modem and the secondary CDMA modem, and the secondary CDMA modem is controlled by the primary CDMA modem. The second PN code (hereinafter referred to as the third PN code) may be controlled to perform a sleep and wake-up operation in the same manner as described above, except for convenience in the claims. ) Is a PN sequence different from the PN sequence of the first PN code, and the secondary CDMA modem may receive the secondary paging channel using the third PN code after the wake up occurs.

According to another aspect of the present invention, there is provided a system, comprising: at least one wireless base station communicating with a mobile communication terminal located within a predetermined area by using a first PN code; And at least one secondary base station for communicating with the mobile communication terminal located in a predetermined area of the predetermined area by using a third PN code substantially different from that used in the wireless base station, wherein the secondary base station includes the third PN. A secondary paging channel may be transmitted using a code, and a local information database may be provided in the predetermined area to perform a local information service according to a request of the mobile communication terminal. In addition, the secondary base station may transmit the secondary paging channel using the third PN code, and may be connected to a server providing the information in the predetermined area by wire or wirelessly to provide local information to the mobile communication terminal.

A method of performing a local information service using such a mobile communication system includes: (a) checking whether a mobile communication terminal has entered the predetermined area; (b) providing content related to the predetermined area to the mobile communication terminal; (c) providing an additional service related to the content requested by the mobile communication terminal among the contents, wherein the additional service is configured to access the web page of the selected content by the mobile communication terminal. It may be characterized in that the interworking with the wireless base station, the mobile communication terminal may be characterized in that the interworking with the wireless base station to access the corresponding telephone number of the selected content.

According to the present invention for solving the above another technical problem, a mobile communication terminal having a primary CDMA modem and a secondary CDMA modem and performing communication with a wireless base station in charge of a predetermined area through the primary CDMA modem includes: A method of communicating with a secondary base station providing local area information of a predetermined area in a predetermined area through a PN sequence different from a PN sequence to be used includes: (a) the secondary CDMA modem matching slot synchronization with the primary CDMA modem; (b) the secondary CDMA modem has woken up; (c) the secondary CDMA modem receiving the secondary paging channel using the PN sequence of the secondary base station; (d) receiving the local information service for the predetermined area by the paging information.

The computer-readable recording medium for a method of performing a local information service using the mobile communication system according to the present invention for solving the another technical problem is (a) check whether the mobile communication terminal has entered the predetermined area; Doing; (b) providing content related to the predetermined area to the mobile communication terminal; (c) recording a program for causing a computer to execute the method comprising the step of providing an additional service related to the content requested by the mobile communication terminal among the contents.

In a CDMA mobile communication system, it can be roughly classified into a mobile communication switch, a base station (including a repeater), and a mobile station (terminal). The mobile communication exchange consists of connection with each base station control device, information and authentication of subscribers, and related additional equipment, and plays a role of forming a connection with other networks. A base station (relay) is composed of a base station controller (BSC), a base station (BTS), a repeater, and the like, and is intended for connection with an exchange so that a mobile station can make a call with a desired counterpart.

The CDMA mobile communication terminal according to the present invention includes an additional secondary CDMA modem as well as a primary CDMA modem capable of communicating in a system consisting of an existing CDMA base station, and the base station communicating with the secondary CDMA modem in the terminal has one cell area. It may be a primary base station in charge of the secondary base station or a secondary base station in charge of a certain area within the area. Here, the primary base station is a CDMA base station in a mobile communication system that communicates with a terminal located within a cell area using a communication channel including a paging channel. An additional channel different from the existing base station can be used through a secondary CDMA modem of the terminal. In addition, the secondary base station is located in a certain area and uses the same frequency as the existing CDMA base station and uses the same PN sequence or different PN sequence with different PN sequence offset. It is a feature to provide the services involved in the system.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

The mobile communication terminal providing additional channels and services in the mobile communication system according to the present invention is a new mobile communication terminal different from the existing one. 2 is an example of an internal configuration of a CDMA mobile communication terminal having two CDMA modems. The internal configuration of the terminal includes an antenna 200 for wireless connection with an existing mobile communication network, an RF unit 210, a main CDMA modem 230 for modulation and demodulation, and a control processor 240. The operation of the terminal is the same as the existing terminal defined in the standard. In addition, the terminal accommodates an additional auxiliary CDMA modem 220, through which additional channels and services are provided, three examples of which will be described below.

Signals transmitted by a primary base station in charge of one cell area or a secondary base station in charge of a certain area in the area use the same frequency band, and through a single antenna 200 and an RF unit 210, a primary CDMA modem ( 230 and secondary CDMA modem 220, each demodulated information is passed to control processor 240. This signal is multiplexed according to the CDMA method, and a signal that cannot be processed by the primary CDMA modem 230 is processed by the secondary CDMA modem 220.

An example of this is a channel with a separate code that the primary CDMA modem 230 cannot process within the PN sequence of the primary base station (hereinafter referred to as the first PN code) or the same PN sequence with a different PN sequence offset than the primary base station. (Second PN code) or a different PN sequence (third PN code), but the specific type of code and its usage are not limited and any code that does not interfere with the communication of the existing network can be used.

In addition, by the control processor 240, the primary CDMA modem 230 and the secondary CDMA modem 220 may be coupled to the same frequency band through the combiner 250, one antenna 200, and the RF unit 210. A signal may be transmitted to a base station, an example of which may be an existing access channel or a call channel, but in the case of the secondary base station, any channel provided by the secondary base station may be used. In order to provide additional channels and services while maintaining existing services in a conventional CDMA mobile communication system, additional functions or additional secondary base stations are required.

1 illustrates an example of a CDMA mobile communication system including a base station for one cell area and a secondary base station for a certain area within the area. The base station 100 in charge of one cell area 130 performs an existing service in conjunction with an existing terminal (not shown) as well as new terminals 101, 111, and 122 having additional functions and a network device (not shown). .

The base station 100 provides additional channels so that the new terminal 101 can perform a separate additional function (function 1) to reduce power consumption. The secondary base station 110 in charge of a certain zone 140 in the area may play the role of a wireless private exchange, and the new terminal 111 in that zone has a separate additional function (function 2 during the waiting period of the existing service). ) Can be performed. In addition, the secondary base station 120, which is in charge of another predetermined area 150 in the area, may serve as a miniaturized local base station providing local information, and the new terminal 122 in the area may be configured to provide an existing service. During the waiting period an additional additional function (function 3) can be performed.

In FIG. 1, each of the predetermined zones 140 and 150 is located in one cell region 130, but one or more zones may exist according to a cell plan, and may exist across multiple cell regions. It is the secondary base station has a zone for communication services. In this case, the secondary base stations 120 and 110 may be controlled by the existing CDMA mobile communication system or may independently control. In addition, the new terminals 101, 111 and 122 need not be limited to only one of each additional function, but may include some or all of the additional functions.

A case of function 1 is described below.

In the case of function 1, the base station 100 in charge of one cell region 130 adds a separate paging indication channel in addition to the paging channel in the first PN code, and the new terminal 101 accordingly receives the paging information. By blocking the power consumption can be reduced. A mobile communication terminal for this purpose is an RF unit connected to an antenna to perform signal transmission and reception, to achieve system synchronization and slot synchronization through the received signal, and to provide each synchronization information to a secondary CDMA modem and to receive a paging channel. A CDMA modem, a secondary CDMA modem that matches slot synchronization with synchronization information provided from the primary CDMA modem, and receives a paging indication channel that can determine whether the paging channel is different from the paging channel received by the primary CDMA modem; If there is no paging instruction in the indication channel is configured to block the power of the RF unit and the terminal transitions to the sleep state.

Referring to FIG. 3, which shows a flow example of the method according to the present invention for a method of reducing the power of such a mobile communication terminal, the signal received from the base station is distributed to the primary CDMA modem and the secondary CDMA modem ( 30), through the signal received by the primary CDMA modem to achieve system synchronization and slot synchronization and initiate paging channel reception (31). The secondary CDMA modem matches slot synchronization with the synchronization information of the primary CDMA modem and generates a wake up (32). In step 33, the secondary CDMA modem receives the paging indication channel and checks whether a paging indication is made to the terminal. If there is a paging instruction, the reception of the paging channel by the main CDMA modem is continued, and if there is no paging instruction, the terminal is put to sleep (34) to reduce unnecessary reception and power can be reduced.

Let's take a closer look at this process. In a CDMA mobile communication terminal having two CDMA modems, a main operation of a primary CDMA modem communicating with a base station in charge of one cell area is performed by a method in which terminals in one cell area communicate with the main base station and exchange information. It is the same as the existing CDMA mobile communication method. When the terminal is powered on, the terminal enters an initializing state, and in the initializing state, the terminal is synchronized with the CDMA system through pilot channel acquisition, sync channel acquisition, and time conversion using a first PN code. The time conversion refers to synchronizing with the CDMA system time based on the end point of the sync channel message and the information in the message.

After that, the terminal enters a dormant state and can perform various functions such as paging channel monitoring, registration, handoff, system information processing, and origination in the dormant state, but only the paging channel monitoring, which is the main concern of the present invention, will be mentioned. Current CDMA mobile terminals repeat periodic sleep and wake up operations to save power. That is, the terminal operates the RF unit and the modem to monitor the paging channel only for the paging slot allocated to the mobile station in idle state (the time when the base station promises to send the paging message to the terminal if there is paging). Save power by shutting off power of terminal hardware including RF part. Therefore, when the terminal receives information during the corresponding paging slot and its paging is confirmed, the terminal performs a subsequent procedure accordingly. In order to receive the information, the terminal wakes up before the corresponding slot and synchronizes with the CDMA system again to paging. The channel must be used to demodulate the signal for that slot period.

The main operation of the secondary CDMA modem is based on the system synchronization and slot synchronization generated by the primary CDMA modem when the terminal's primary CDMA modem is performing paging monitoring according to the procedure described above. The slot synchronization is synchronized with the CDMA modem, and after a wake-up occurs, a separate paging indication channel is received using the first PN code from the start of the corresponding slot, and the terminal determines whether paging is performed. If there is a paging instruction for itself, the primary CDMA modem continues to receive the paging channel for that slot as before. If there is no paging instruction for itself, the secondary CDMA modem provides this information to provide RF and peripheral hardware devices. Turn off the power and let it go to sleep. As a result, when there is no paging by using a separate additional channel, it blocks the reception of unnecessary information during the corresponding slot and saves power.

A case of function 2 is described below.

In the case of function 2, the secondary base station 110 in charge of a certain region 110 in the area maximizes the use of hardware and software of the existing base station apparatus by using a second PN code that is the same as the existing PN sequence and has a different offset. The new terminal 111 in the zone may recognize the entry into the zone by obtaining the second PN code and may be provided with a wireless private exchange service corresponding to the zone.

The mobile communication terminal for this purpose is connected to the antenna to perform the transmission and reception of the signal, a signal to be transmitted to a predetermined mobile communication base station using the first PN code and the signal received by the RF unit performs encoding and decoding, respectively Decode and encode the signals received by the RF unit and the signals to be transmitted to a predetermined mobile communication base station by using a primary CDMA modem and a second PN code substantially different from a first PN code used in the primary CDMA modem. And a control unit for controlling the selective use of the secondary CDMA modem and the primary CDMA modem by synthesizing the signals encoded by the secondary CDMA modem, the primary CDMA modem and the secondary CDMA modem, and transmitting the synthesized signals to the RF unit.

In this case, the secondary CDMA modem may use a second PN code to synchronize with a predetermined mobile communication base station to perform communication through a communication channel including a paging channel and an access channel different from the primary CDMA modem. The 2PN code may use the same PN sequence and different offsets as the first PN code.

A mobile communication system for this purpose includes at least one wireless base station communicating with a mobile communication terminal located within a predetermined area using a first PN code, and using the second PN code substantially different from that used in the wireless base station. At least one secondary base station for communicating with the mobile communication terminal located within a predetermined area of the. For the function 2, it is preferable that the second PN code is a PN code having the same PN sequence as the first PN code and different offset. The secondary base station may use a communication channel including a paging channel and an access channel different from that used by the wireless base station, and the secondary base station may function as a wireless private exchange including an extension call origination function for a call with a terminal in the predetermined area. Can be done.

The wireless private exchange is a telephone exchange system for all employees to share a certain number of external telephone lines used in the company, and to automatically connect telephones among internal users connected to the extension. The primary purpose of using it is to reduce the cost of assigning a regular telephone line to all employees in the company. Originally, analog technology was used, but nowadays digital technology is used.

More specifically, a wireless private exchange is a connection device capable of exchanging a line between a trunk line and a local telephone or a local telephone, and includes a trunk line relay, a signaling device, and additional equipment additionally added to grant a part of the exchange function. It is being developed in various forms to support various services that are desired by the modern era beyond simple voice-oriented services. In particular, CTI and Telecommunications are creating enormous service and added value.

Wireless private exchanges include the following: telephone trunk lines that are terminated, computers (requires their own memory) used to exchange and manage calls inside and outside the wireless private exchange, circuit networks within the wireless private exchange, and operators. For console or switchboard.

Hereinafter, the basic functions of the wireless private exchange will be described. As a basic function, the incoming / outgoing call function is the simplest and highest frequency of use with the incoming / outgoing call. This function is used to call internal subscribers. It performs the CO line function, which is used when an internal subscriber wants to make a call to the outside. A typical way is to pass through an operator and a DOD method that does not go through. In addition, CO line incoming, Pick_up, Transfer, Camp, Forward, Conference, Class, Hold, Wake up There are functions and these functions can be applied by the present invention implemented in function 2 and performed at the secondary base station.

A method of performing communication between a mobile terminal and a secondary base station in function 2 will be briefly described with reference to FIG. 4, which shows an example of such a method. The secondary CDMA modem acquires a pilot channel using the PN sequence of the secondary base station in the initialization state (40). The secondary CDMA modem acquires a sync channel (41). The secondary CDMA modem performs a time conversion (42). A secondary CDMA modem monitors the call channel for communication with a mobile communication terminal located within the predetermined area (43). If there is a call, the secondary CDMA modem initiates communication on a call channel different from the call channel used by the wireless base station (44).

In the CDMA mobile communication terminal having two CDMA modems, the main operation procedure of the secondary CDMA modem communicating with the wireless private exchange, which is a secondary base station serving a certain area, shows that the main CDMA modem of the terminal performs paging monitoring according to the above-described procedure. When performing, the secondary CDMA modem in the terminal entering the area of the secondary base station such as a wireless private exchange performs a similar procedure to monitor paging of the secondary base station. The secondary CDMA modem is synchronized with the secondary base station through the process of pilot channel acquisition, sync channel acquisition, and time conversion using the second PN code in the initialization state.

The terminal then enters a dormant state independent of the main CDMA modem and performs various functions, such as paging channel monitoring. In particular, a terminal belonging to a certain region of one cell area can perform communication using a communication channel including a paging channel and an access channel with a primary base station at a moment, but at a different time, it is different from that of the secondary base station and the main base station. It is possible to perform communication using a communication channel including a channel and an access channel. Therefore, depending on whether or not to enter a certain area can be received from the main base station or any base station, it is possible to send to the main base station or secondary base station (for economic reasons).

Hereafter, the function 3 will be described.

In the case of function 3, the secondary base station 120, which is in charge of another constant area 150 in the area, is a small base station that is greatly differentiated from the existing base station for the purpose of transmitting zone information in a small area, and uses a third PN code different from the existing PN sequence. To accommodate the paging channel and peripheral functions for the transmission of the paging channel, and the new terminal 122 in the zone recognizes the entry into the zone by acquiring the third PN code and the zone-specific information service corresponding to the zone. Can be provided. In addition, the base station 120 may be connected to the wired 121 as well as the wireless 123 only for interworking with the network device, the information provider that is part of the network device may be present in any location in the area or outside the station.

The mobile communication terminal for function 3 is connected to an antenna to perform signal transmission and reception, a signal to be transmitted to a predetermined mobile communication base station using a first PN code and a signal received and received by the RF unit, respectively. Decodes and encodes a signal received by the RF unit and a signal to be transmitted to a predetermined mobile communication base station, respectively, using a primary CDMA modem which performs the operation, a third PN code substantially different from the first PN code used in the primary CDMA modem. It consists of a secondary CDMA modem for performing the operation, a signal synthesis unit for synthesizing the signals encoded in the primary CDMA modem and the secondary CDMA modem and transmits to the RF unit, and a control unit for controlling the selective use of the secondary CDMA modem and the primary CDMA modem .

At this time, the control unit generates a recovered clock using the frequency synchronization restored from the primary CDMA modem, controls the clock to be used by the primary CDMA modem and the secondary CDMA modem, and the secondary CDMA modem is controlled by the primary CDMA modem. It is possible to control to perform a sleep and wake-up operation in the same manner as the modem, wherein the third PN code is a PN sequence different from the PN sequence of the first PN code, and the auxiliary CDMA modem is the third PN after the wake-up occurs. The code can be used to receive the secondary paging channel.

The system for function 3 includes at least one wireless base station communicating with a mobile communication terminal located within a predetermined area by using a first PN code, and a third PN code (a first PN code substantially different from that used by the wireless base station). At least one secondary base station for communicating with the mobile communication terminal located in a predetermined area in the predetermined area by using a PN sequence and a different PN sequence).

At this time, the secondary base station transmits an auxiliary paging channel using the third PN code, and has a local information database in the predetermined area to provide unilateral information of the secondary base station or to request a local information service at the request of the mobile communication terminal. Can be performed. The secondary base station may transmit the secondary paging channel using the third PN code, and may be connected to a server providing the information in the predetermined area by wire or wirelessly to provide local information to the mobile communication terminal.

FIG. 5 illustrates an example of a method for providing a local information service in a mobile communication system according to the present invention. As described above, the secondary CDMA modem matches slot synchronization with the primary CDMA modem (50) and the secondary CDMA modem. The CDMA modem wakes up (51). The secondary CDMA modem receives the secondary paging channel using the PN sequence of the secondary base station (52), and is provided with local information service for a certain area by the paging information (53).

The main operation of the secondary CDMA modem in which the CDMA mobile communication terminal having two CDMA modems for the local information service communicates with the local base station, which is the secondary base station serving a certain area. Therefore, when performing paging monitoring, the secondary CDMA modem in the terminal entering the secondary base station such as the local base station receives information about the system synchronization and the slot synchronization generated by the primary CDMA modem to perform slot synchronization with the primary CDMA modem. Receive a separate secondary paging channel using the third PN code from the start of the slot after the wake-up occurs, and if the paging is confirmed to provide the information service for each zone for a certain zone by this information. do.

In particular, since a terminal belonging to a certain region of one cell area uses a paging channel from the secondary base station, the secondary base station accommodates simple functions, thereby enabling a compact and inexpensive device configuration. Referring to the process of providing a local information service with reference to FIG. 6, check whether the mobile communication terminal enters the predetermined area (60), provide the mobile terminal with the contents related to the predetermined area (61), and In operation 62, an additional service related to the content requested by the mobile communication terminal is provided. The additional service may be linked with the wireless base station to allow the mobile communication terminal to access a corresponding web page of the selected content. The additional service may be linked with the wireless base station to access the corresponding telephone number of the selected content. It may be characterized in that.

The server providing the information service is configured by receiving contents related to each zone from the information provider, but can be made in various ways such as by using a telephone or the Internet, and the service that the server wants to provide can provide the content for a specific zone. It is preferable to construct a content database for each zone because it is intended to provide, but it can be installed in various places without limitations such as existing base stations, mobile telephone exchanges, and auxiliary base stations. In addition, as shown in FIG. 1, information other than the local information may also be transmitted by being connected by wire or wirelessly from the servers 121 and 123 outside the area.

A closer look at local information services, for example, is that if a certain area is Mapo-gu, Smart in Mapo-gu will offer a special summer fruit sale until 17:00 today, and Mapo Travel Agency will offer a free Caribbean Bay voucher for 200 first-come-first-served customers. Receiving various contents from a person who wants to provide information in Mapo-gu, such as information to distribute. The receiving method may be performed by various methods such as using a telephone or the Internet.

Since the service to be provided by the server is to provide content for a specific zone, it is desirable to establish a content database for each zone. The server may set the display order for a plurality of contents stored in each content database. The server provides content related to the zone stored in the content database to the user mobile communication terminal located in the specific zone. This provision is preferably performed by the server via the regional base station, i.e., the secondary base station. If the user's mobile terminal is informed that Mapo Travel Agency will distribute Caribbean Bay discount tickets free of charge to 200 first-come-first-served users, and the user wants to call Mapo Travel Agency, press a simple setting number for Mapo Travel Agency, for example, press Mapo immediately. You can make a call to your travel agent.

In addition, if the woosung video is provided with information about renting a synpro for 500 won, when the user presses the setting number of the dominant video, he / she directly connects to the web page of the dominant video and receives the information on the type of synpro that the dominant video has. Can be. It is apparent that the present invention can further provide an additional service for the content selected by the user among the contents displayed in this manner, and the method of the additional service can be performed in more various ways depending on the type of the provided content.

According to function 3, the secondary base station which operates in dependence on the existing base station and the mobile communication terminal which can use such a system rely solely on the main modem and the control processor for the RF hardware, frequency synchronization circuit, and power control circuit. Auxiliary paging channel transmitted at the same time in the band can be received, and a separate channel can be received using additional functions while still using most of the hardware and software used in the cellular terminal.

In addition, by using this system, it is possible to perform information service by zone, so that users can receive necessary and useful information in more diverse and appropriate places and times, and information providers can provide services to more customers. More effective information dissemination can make information more valuable.

Brief description of the present invention consists of a conventional base station that implements a terminal having two CDMA modems and can use such a terminal, and a secondary base station serving as a local information service or a wireless private switch in a certain area of the area. By implementing a CDMA mobile communication system, it is possible to perform terminal power reduction, local information service, and wireless private exchange service. In addition, the present invention can be applied to the CDMA mobile communication system described above as well as to other mobile communication systems having different wireless access methods.

The invention can also be embodied as computer readable code on a computer readable recording medium. The computer-readable recording medium includes all kinds of recording devices in which data that can be read by a computer system is stored. Examples of computer-readable recording media include ROM, RAM, CD-ROM, magnetic tape, hard disk, floppy disk, flash memory, optical data storage device, and also carrier waves (for example, transmission over the Internet). It also includes the implementation in the form of. The computer readable recording medium can also be distributed over network coupled computer systems so that the computer readable code is stored and executed in a distributed fashion.

According to the present invention, while using most of the hardware and software used in the existing CDMA terminal as it is, by using a separate channel provided by the auxiliary modem to accommodate the paging channel indication function to reduce the power consumption of the terminal or wireless private switch, By accommodating an interworking function with a separate network device in a zone such as a local base station, it is possible to perform a communication service and a zone-specific information service in a zone.

That is, by reducing power consumption, the standby time of the terminal is extended, and when the terminal enters a specific area, it is cheaper and more effective communication service to use the system in the area than the existing CDMA mobile communication system, and the vast data More specific data, registered by zone at different times and places, will provide speed and usefulness as information.

Claims (20)

In the mobile communication terminal for transmitting and receiving a signal with at least one mobile communication base station, An RF unit connected to the antenna to transmit and receive a signal; A first CDMA modem which encodes and decodes a signal to be transmitted to a first mobile communication base station using a first PN code and a signal received by the RF unit; A second CDMA modem which encodes and decodes a signal to be transmitted to a second mobile communication base station and a signal received by the RF unit by using a second PN code different from the first PN code; A signal synthesizer which synthesizes the signals encoded by the first and second CDMA modems and transmits the synthesized signals to the RF unit; And And a control unit controlling selective use of the first and second CDMA modems. The control unit restores a clock using the frequency synchronization restored in the first CDMA modem, controls the restored clock to be used in the first and second CDMA modems, and the second CDMA modem is the same as the first CDMA modem. And a sleep and wake-up operation. The method of claim 1, The second PN code is a mobile communication terminal, characterized in that the first PN code and the PN sequence is the same but different offset. The method of claim 1, And the second CDMA modem performs communication through a communication channel including a paging channel and an access channel different from the first CDMA modem. The method of claim 1, The second PN code is a mobile communication terminal, characterized in that the first PN code and the PN sequence is different. delete The method of claim 4, wherein And wherein the second CDMA modem receives an auxiliary paging channel using the second PN code after the wake-up occurs. In the mobile communication terminal for transmitting and receiving a signal with at least one mobile communication base station, An RF unit connected to the antenna to transmit and receive a signal; A signal distribution unit for distributing the signal received by the RF unit to a primary modem and a secondary modem; A primary modem which achieves system synchronization and slot synchronization through the received signal, provides each synchronization information to a secondary modem, and receives a paging channel; A secondary modem that matches slot synchronization based on the synchronization information provided from the primary modem, and receives a paging indication channel capable of confirming paging as a channel different from the paging channel received by the primary modem; And And a controller for shutting off power of the RF unit and transitioning the terminal to a sleep state when there is no paging instruction in the paging instruction channel. 8. The mobile terminal of claim 7, wherein the primary modem and the secondary modem are primary CDMA modems and secondary CDMA modems, respectively. At least one first base station communicating with a mobile communication terminal located within a predetermined area by using a first PN code; And At least one second base station transmitting a secondary paging channel using a second PN code substantially different from that used in the first base station and communicating with the mobile communication terminal located in a predetermined area within the predetermined area. Wireless mobile communication system, characterized in that. The method of claim 9, The second PN code is the same as the first PN code and the PN sequence, the offset is different, and the second base station is a mobile communication terminal using a communication channel including a paging channel and an access channel different from that used by the first base station Wireless communication system, characterized in that for performing communication with. The method of claim 9, And the second base station performs a function of a wireless private exchange including an extension call in / out function for a call with the mobile communication terminal located in the predetermined area. The method of claim 9, The second PN code is different from the first PN code and the PN sequence, And the second base station has a local information database in the predetermined area and provides a local information service at the request of the mobile communication terminal. The method of claim 9, The second PN code is different from the first PN code and the PN sequence, And the second base station is wired or wirelessly connected to a server providing the information in the predetermined area to provide local information to the mobile communication terminal. delete A second PN code having a first CDMA modem and a second CDMA modem and having a sequence different from that of the first PN code used by the first base station by a mobile communication terminal for communicating with the first base station in charge of a predetermined area through the first CDMA modem; In the method for receiving area information of a certain area in the predetermined area from a second base station using a, (a) matching slot synchronization of the second CDMA modem with slot synchronization of the first CDMA modem; (b) waking up the second CDMA modem; (c) the second CDMA modem receiving a secondary paging channel from the second base station using a second PN code; (d) receiving local information service for a predetermined area by paging information received through the auxiliary paging channel. Auxiliary paging channel using at least one first base station communicating with a mobile communication terminal located within a predetermined area using a first PN code, and a second PN code different from the first PN code used by the first base station. A method for providing region information in a wireless mobile communication system comprising at least one second base station for transmitting a message and communicating with the mobile communication terminal located in a predetermined area within the predetermined area, (a) the first base station transmitting the synchronization signal using the first PN code; checking whether a mobile communication terminal enters the predetermined area; (b) the second base station transmitting a secondary paging channel using the second PN code; (c) determining, by the second base station, whether the mobile communication terminal has entered the predetermined area in charge of the second base station; (d) providing contents related to the predetermined area to the mobile communication terminal; And (e) providing an additional service related to the content requested from the mobile communication terminal among the contents. The method of claim 16, The step (d) is a local information service method, characterized in that for interworking with the wireless base station to access the web page of the content selected by the mobile communication terminal. The method of claim 16, The step (d) is a local information service method characterized in that the mobile communication terminal interlocks with the wireless base station to access the corresponding telephone number of the selected content. In the power reduction method of a mobile communication terminal having a first CDMA modem and a second CDMA modem to communicate with a wireless base station, (a) distributing a signal received from a base station to the first CDMA modem and the second CDMA modem; (b) achieving system synchronization and slot synchronization through the signal received by the first CDMA modem and initiating paging channel reception; (c) the second CDMA modem matching slot synchronization with the synchronization information of the first CDMA modem and generating a wake-up; (d) receiving a paging indication channel in the second CDMA modem and checking whether a paging indication is made; And (e) transitioning the terminal to a sleep state if there is no paging instruction. delete