KR100299029B1 - Call connection method for terminal of wireless local loop system - Google Patents

Abstract

end. The technical field to which the invention described in the claims belongs

A terminal of a wireless subscriber network (WLL) system.

I. The technical problem to be solved by the invention

Provided is a call connection method of a wireless subscriber network terminal device that can implement mobility and portability.

All. Summary of Solution of the Invention

A wireless telephone terminal for wireless communication with a wireless subscriber network home terminal is provided, and the wireless telephone terminal is connected to a wireless subscriber network base station via a wireless subscriber network home terminal to provide a wireless telephone call to a user.

la. Important uses of the invention

Used for wireless subscriber network system.

Description

CALL CONNECTION METHOD FOR TERMINAL OF WIRELESS LOCAL LOOP SYSTEM}

The present invention relates to a wireless subscriber network system, and more particularly to a terminal of a wireless subscriber network system.

A wireless subscriber network, that is, a WLL (Wireless Local Loop) system, provides a subscriber network using a wireless network for a place where an existing wired telephone network is not installed or a home or office lacking a wired telephone line.

An example of a WLL system is a European digital cordless telephone, i.e., a Digital European Cordless Telephone (DECT) WLL system. The DECT WLL system is composed of a radio switching center, a WLL base station, and a WLL home terminal. The WLL home terminal can be seen as a replacement for the existing landline telephone terminal and is used in a home or office environment. For good communication with the WLL base station, the WLL home terminal is fixedly installed in a place where a radio signal can be transmitted and received without any radio interference. That is, the WLL home terminal must be fixedly installed in a good wireless position with the WLL base station in order to maintain a good call state, such as a conventional landline telephone terminal.

If the relative position of the WLL home terminal with respect to the WLL base station is flexible, it may not be able to guarantee a good call state and even the user may not be able to use the WLL home terminal. Accordingly, the WLL system allows the user to use the WLL home terminal in a fixed place.

However, this limits the user's range of use of the WLL home terminal to one place, similar to existing landline telephones. Therefore, the WLL system is a wireless communication network, but because of the fixed communication, the WLL system does not fully utilize the advantages of the mobility and portability of the wireless.

As described above, in the WLL system, the WLL home terminal is fixed and used at a predetermined place, thereby limiting mobility and portability, which is still inconvenient to use as a conventional wired telephone terminal.

Accordingly, an object of the present invention is to provide a call connection method of a WLL terminal device that can implement mobility and portability.

1 is a system configuration diagram according to an embodiment of the present invention;

2 is a block diagram of the WLL terminal device 102 shown in FIG.

3 is a signal flow diagram in the standby state according to an embodiment of the present invention;

4 is a diagram illustrating a time slot in a standby state according to an embodiment of the present invention;

5 is a signal flow diagram of an outgoing call connection according to an embodiment of the present invention;

6 is a diagram illustrating a time slot of an outgoing call connection according to an embodiment of the present invention;

7 is a signal flow diagram of an incoming call connection according to an embodiment of the present invention;

8 illustrates a time slot of an incoming call connection according to an embodiment of the present invention.

The present invention for achieving the above object is provided with a wireless telephone terminal for wireless communication with the WLL home terminal, and provides a wireless telephone call to the user by connecting the wireless telephone terminal to the WLL base station via the WLL home terminal.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. While many specific details are set forth in the following description and in the accompanying drawings, such as specific time slot use examples, to provide a more general understanding of the invention, these specific details are illustrated for purposes of explanation of the invention. It is not meant to be limited to them. And a detailed description of known functions and configurations that may unnecessarily obscure the subject matter of the present invention will be omitted. In the following description, it should be noted that like elements represent like numerals wherever possible.

Figure 1 shows a system configuration according to an embodiment of the present invention, it is shown that the WLL terminal device 102 of the present invention is linked to the WLL base station 100 of the DECT type WLL system. The WLL base station 100 is a WLL base station of a conventional DECT type WLL system. The WLL terminal 102 is composed of a WLL home terminal 104 and a radiotelephone terminal 106. The WLL home terminal 104 communicates wirelessly with the WLL base station 100 and the wireless telephone terminal 106 to synchronize and connect the wireless telephone terminal 106 to the WLL system. The wireless telephone terminal 106 is used to provide wireless telephone calls through the WLL system to the user.

2 shows a block diagram of the WLL terminal device 102. In the WLL terminal 102 shown in Fig. 2, the WLL home terminal 104 is a conventional DECT type WLL home terminal, which is fixedly installed in a house or an office. The WLL home terminal 104 includes a radio frequency (RF) unit 200, a burst mode controller (BMC) unit 202, a digital signal processor (DSP) unit 204, a sound processing unit 206, and a central processing unit (CPU): A central processing unit 208, a hook-on / off, a dial 210, a ringer 212, and a tone generator 214. The RF unit 200 is connected to the BMC unit 202 and inputs a voice signal or data to be transmitted to the WLL base station 100 or the radiotelephone terminal 106 from the BMC unit 202, modulates the radio signal, and transmits it. The radio signal received from the WLL base station 100 or the radiotelephone terminal 106 is demodulated into a voice signal or data and output to the BMC unit 202. The BMC unit 202 is connected to the RF unit 200, the DSP unit 204, and the central processing unit 208 and controls the synthesis and transmission of voice signals and data, time slots, and RF frequencies. The DSP unit 204 modulates the transmission voice signal input from the sound processor 206 into a digital signal, outputs the signal to the BMC unit 202, demodulates the digital signal input from the BMC unit 202 into an analog voice signal, and outputs the audio signal. 206, and processes digital signals. The sound processor 206 amplifies the analog signal of the WLL home terminal 104 and modulates and demodulates the sound signal. The central processing unit 208 is connected to the BMC unit 202, the hook on / off and the dial unit 210, the ringer unit 212 and the tone generator 214 to control the function and operation of the WLL home terminal 104 do. The hook on / off and dial unit 210 performs a hook on or a hook off under the control of the central processing unit 208, and generates a DTMF (Dual Tone Multi-Frequency) signal according to the dial data. The ringer 212 alerts incoming calls under the control of the central processing unit 208 when there is an incoming call. The tone generator 214 generates various tones required for the WLL home terminal 104.

The wireless telephone terminal 206 includes an RF unit 216, a BMC unit 218, a DSP unit 220, a sound processor 222, a central processor 224, and a peripheral device 226. The RF unit 216 inputs a voice signal or data to be transmitted to the WLL home terminal 104 from the BMC unit 218, modulates it into a radio signal, and transmits the radio signal received from the WLL home terminal 104. And demodulate the data and output the demodulated data to the BMC unit 218. The BMC unit 218 is connected to the RF unit 216, the DSP unit 220, and the central processing unit 224 and controls synthesis and transmission of voice signals and data, time slots, and RF frequencies. The DSP unit 220 modulates a transmission voice signal input from the sound processor 222 into a digital signal, outputs the signal to the BMC unit 218, demodulates the digital signal input from the BMC unit 218 into an analog voice signal, and outputs the audio processor. And outputs a digital signal. The sound processor 222 is connected to a handset (not shown), amplifies an analog signal input and output to the handset, and modulates and demodulates the sound signal. The central processing unit 224 is connected to the BMC unit 218 and the peripheral unit 226 to control the functions and operations of the radiotelephone terminal 106. The peripheral unit 226 is provided with a key input device, a display device, an alarm device, and the like to provide key data such as a dial to the central processing unit 224, to alarm incoming calls under the control of the central processing unit 224, and to provide various information. Display.

As described above, the present invention connects a radiotelephone terminal 106 that communicates wirelessly with the WLL home terminal 104 to the WLL base station 100 via the WLL home terminal 104. This gives the user a wireless phone call. In the present invention, the communication channel between the WLL home terminal 104 and the WLL base station 100 is the same as the concept of the existing DECT type WLL system, and it is based on this. In the WLL terminal apparatus 102 of the present invention, the call connection by the radiotelephone terminal 106 is divided into a standby state and an outgoing call connection or an incoming call connection.

First, the standby state will be described. An example of a signal flow diagram in the standby state is shown in FIG. 3, and an exemplary time slot thereof is shown in FIG. 4. 3 shows the signal flow between the WLL base station 100, the WLL home terminal 104, and the radiotelephone terminal 106 in steps 300-302. 4 shows a time slot of the DECT scheme, FIG. 4 (a) shows the time slot of the WLL home terminal 104 and FIG. 4 (b) shows the time slot of the wireless telephone terminal 106. FIG. According to the DECT method, one frame is composed of 24 time slots TS1 to TS24 as shown in FIG. 4, where 12 time slots are used as transmission slots and the remaining 12 time slots are reception slots. Used as In addition, the time slots 400 to 404 hatched among the time slots TS1 to TS24 of FIG. 4 indicate, for example, time slots used in the standby state. The time slot 400 is a receiving slot of a dummy bearer received from the WLL base station 100 to the WLL home terminal 104, and the time slot 402 is a radiotelephone terminal 106 at the WLL home terminal 104. ) Is a transmission slot of a dummy bearer to transmit. The time slot 404 is a reception slot of a dummy bearer received at the wireless telephone terminal 106 from the WLL home terminal 104.

Referring now to FIG. 3, in a dashed state, the WLL home terminal 104 receives a dummy bearer of a DECT transmitted from the WLL base station 100 of the DECT WLL system. As such, the dummy bearer received by the WLL home terminal 104 is received through the time slot 400 in step 300. In this case, the received dummy bearer includes overall DECT information such as system identification (ID) and incoming signal status. This dummy bearer is demodulated by the RF unit 200 of the WLL home terminal 104 and transferred to the receiving register in the BMC unit 202. Typically, the WLL home terminal 104 synchronizes with the dummy bearer being received and analyzes the information included in the dummy bearer. The WLL home terminal 104 replaces the received dummy bearer ID with its own ID and retransmits it to the radiotelephone terminal 106 via the time slot 402 in step 302 of FIG. That is, the WLL home terminal 104 separately connects a separate ID that can be connected to the radiotelephone terminal 106 to the use system and the radiotelephone terminal 106 separately from the registration ID with the system. The dummy bearer transmitted by the WLL home terminal 104 is received and demodulated in the radiotelephone terminal 106 as in the WLL home terminal 104. That is, the radiotelephone terminal 106 is synchronized with the WLL home terminal 104, and as a result, can be synchronized with the WLL system to analyze the transmission information of the WLL system.

In such a standby state, an outgoing call connection for making a call connection is established according to a call attempt by the radiotelephone terminal 106, or a call connection is made by the radiotelephone terminal 106 as a call is introduced into the WLL home terminal 104 in the WLL system. Incoming call connection is made.

The above-described outgoing call access procedure will be described. An example of a signal flow diagram when an originating call is connected is shown in FIG. 5, and an example of a time slot at this time is shown in FIG. 6. 5 shows the signal flow between the WLL base station 100, the WLL home terminal 104, and the radiotelephone terminal 106 in steps 500-512. 6 shows a time slot of the DECT method, FIG. 6 (a) shows the time slot of the WLL home terminal 104 and FIG. 6 (b) shows the time slot of the wireless telephone terminal 106. Among the time slots TS1 to TS24 of FIG. 6, the time slots 600 to 610 hatched indicate the time slots used for the outgoing call connection, for example. Time slot 600 is a traffic traffic bearer slot transmitted from wireless telephone terminal 106 to WLL home terminal 104, and time slot 602 is WLL home terminal 104 at wireless telephone terminal 106. Is a Tx traffic bearer slot received in a time slot 604 is a Tx traffic bearer slot transmitted from a WLL home terminal 104 to a WLL base station 100, and a time slot 606 is a WLL home at a WLL base station 100; Sign language traffic bearer slot received at terminal 104, time slot 608 is a sign language traffic bearer slot transmitted from WLL home terminal 104 to wireless telephone terminal 106, and time slot 610 is a WLL home terminal Sign language traffic bearer slot received at 104 at wireless telephone terminal 106.

Referring now to FIG. 5, when a user attempts to make an outgoing call using the wireless telephone terminal 106, the wireless telephone terminal 106 allocates a traffic channel to the time slot 600 so as to transmit the WLL home terminal 104 at step 500. Transmits channel assignment request data requesting channel assignment. The WLL home terminal 104 received through the time slot 602 retransmits the channel allocation request data to the WLL base station 100 through the time slot 604 in step 502. In response, the WLL base station 100 transmits channel assignment acceptance data that accepts the channel assignment. Accordingly, when the WLL home terminal 104 receives the channel assignment acceptance data from the WLL base station 100 through the time slot 606 in step 504, the tone generator 214 generates a dial tone to generate an RF tone ( Via the time slot 608 to the radiotelephone terminal 106 at step 506. The radiotelephone terminal 106 then receives the dial tone via the time slot 610. Upon hearing this, when the user attempts to dial by the wireless telephone terminal 106, the dial data accordingly is transmitted to the WLL home terminal 104 in step 508 via the time slot 600. The WLL home terminal 104 having received the dial data through the time slot 602 generates a DTMF signal from the hook on / off and dial unit 210 and generates a DTMF signal through the time slot 604 at step 510. 100). Accordingly, the dial is made. If the receiver then calls and responds, the wireless telephone terminal 106 is connected to the call via the WLL home terminal 104 in step 512 to make a call. At this time, when looking at the voice call with the receiver, the call path is formed through the time slot 600 → time slot 602 → time slot 604 during the call, the time slot 606 → time slot 608 at the time of signing → A call path is formed through the time slot 610.

Next, the incoming call connection process will be described. An example of a signal flow diagram when an incoming call is connected is shown in FIG. 7, and an example of a time slot at this time is shown in FIG. 8. 7 shows the signal flow between the WLL base station 100, the WLL home terminal 104, and the radiotelephone terminal 106 in steps 700-712. 8 illustrates a time slot of the DECT scheme, in which FIG. 8 (a) shows the time slot of the WLL home terminal 104 and FIG. 8 (b) shows the time slot of the wireless telephone terminal 106. FIG. The time slots 800 to 816 hatched among the time slots TS1 to TS24 of FIG. 8 indicate, for example, time slots used for an incoming call connection. Time slots 800-816 are used in WLL home terminal 104 or wireless telephone terminal 106 as in FIG. 6 above.

Referring now to FIG. 7, when an incoming message is transmitted on the dummy bearer of the WLL system and received by the time slot 800 to the WLL home terminal 104 in step 700, the WLL home terminal 104 ( In step 702, the incoming message is retransmitted on the dummy bearer to the radiotelephone terminal 106 through the time slot 802. The wireless telephone terminal 106 receiving the incoming message on the dummy bearer through the time slot 804 informs the user by alerting the incoming call through the alarm device of the peripheral unit 226. When the user attempts an incoming call by inputting a call key in response to the incoming call, the wireless telephone terminal 106 allocates a traffic channel to the time slot 806 to allocate the channel to the WLL home terminal 104 in step 704. Sends the requested channel allocation request data. The WLL home terminal 104 received through the time slot 808 retransmits the channel allocation request data to the WLL base station 100 through the time slot 810 in step 706. In response, the WLL base station 100 transmits channel assignment acceptance data that accepts channel assignment. Accordingly, when the WLL home terminal 104 receives the channel assignment acceptance data from the WLL base station 100 through the time slot 812 in step 708, the WLL home terminal 104 receives the channel assignment acceptance data from the WLL base station 100 in step 710 through the time slot 814. Retransmit to 106. Then, the wireless telephone terminal 106 receives the channel assignment acceptance data through the time slot 816, and in step 712, the wireless telephone terminal 106 is connected to the call via the WLL home terminal 104, thereby making a call. Will be done. At this time, when looking at the voice call with the caller, the path is formed through the time slot 806 → time slot 808 → time slot 810 during the call, and the time slot 812 → time slot 814 during sign language. → A path is formed via time slot 816.

Therefore, by using the wireless telephone terminal 106 in conjunction with the DECT WLL home terminal 104, it is possible to implement the mobility and portability of the user in the DECT WLL system. Accordingly, the inconvenience caused as the existing WLL home terminal is fixed and used in a certain place can be eliminated.

Meanwhile, in the above description of the present invention, specific embodiments have been described, but various modifications can be made without departing from the scope of the present invention. In particular, the embodiment of the present invention has been shown to be applied to the DECT type WLL system, but may be applied to other types of WLL system. However, if the method is different, use a wireless telephone terminal suitable for the method adopted in the WLL system and control the call connection. Therefore, the scope of the invention should not be defined by the described embodiments, but should be defined by the equivalent of claims and claims.

As described above, the present invention has the advantage that the WLL system can implement the mobility and portability of the wireless telephone terminal connected to the existing wired network.

Claims (2)

In a call connection method of a WLL terminal apparatus comprising a wireless telephone terminal for providing a wireless telephone call to a user through a DECT type WLL system, and a WLL base station of the WLL system and a WLL home terminal for wireless communication with the wireless telephone terminal. In In the idle state, the WLL home terminal synchronizes with the dummy bearer received from the WLL base station and retransmits the data to the radio telephone terminal, and the radio telephone terminal receives the dummy bearer received from the WLL home terminal to receive the WLL home. A process synchronized to the terminal, Transmitting, by the wireless telephone terminal, channel allocation request data to the WLL home terminal when a call is attempted by the wireless telephone terminal in the standby state; Retransmitting to the WLL base station when the WLL home terminal receives the channel allocation request data from the radiotelephone terminal; When the WLL base station transmits channel allocation acceptance data to the WLL home terminal in response to the channel allocation request data, the WLL home terminal generates a dial tone and transmits it to the wireless telephone terminal; Transmitting, by the wireless telephone terminal, dial data according to the dial of the user to the WLL home terminal; Generating, by the WLL home terminal, a DTMF signal corresponding to the dial data received from the radio telephone terminal, and transmitting the DTMF signal to the WLL base station; And wherein the wireless telephone terminal is connected to the call via the WLL home terminal. In a call connection method of a WLL terminal apparatus comprising a wireless telephone terminal for providing a wireless telephone call to a user through a DECT type WLL system, and a WLL base station of the WLL system and a WLL home terminal for wireless communication with the wireless telephone terminal. In In the idle state, the WLL home terminal synchronizes with the dummy bearer received from the WLL base station and retransmits the data to the radio telephone terminal, and the radio telephone terminal receives the dummy bearer received from the WLL home terminal to receive the WLL home. A process synchronized to the terminal, Retransmitting the home terminal to the wireless telephone terminal when an incoming message is received from the WLL base station on the dummy bearer in the standby state; Making an incoming call alert in response to receiving the incoming message by the wireless telephone terminal; Transmitting, by the wireless telephone terminal, channel allocation request data to the WLL home terminal when the user responds to an incoming call; Retransmitting to the WLL base station when the WLL home terminal receives the channel allocation request data from the radiotelephone terminal; Retransmitting the WLL home terminal to the wireless telephone terminal when the WLL base station transmits channel allocation acceptance data to the WLL home terminal in response to the channel allocation request data; And wherein the wireless telephone terminal is connected to the call via the WLL home terminal.