KR100423926B1 - How to handle reservation of wireless channel in DCC system - Google Patents

Abstract

The present invention relates to radio channel reservation processing in a digital enhanced cordless telecommunication (DECT) system. Particularly, in order to efficiently use a limited radio channel, the present invention assigns a priority of radio channel use to a specific terminal for each base station and according to the corresponding priority. The present invention relates to a radio channel reservation processing method in a DECT system for granting a right to use a channel differently.

In the present invention, in the DECT system, when a radio channel reservation process is performed within a specific base station, priority is given to a specific terminal according to the priority of a call, and a terminal having a higher priority reserves a channel immediately through a reserved channel. Make a call. In addition, in the case of an incoming call to a specific base station, the call can be made unconditionally regardless of the reserved channel, thereby enabling efficient use of the channel.

Description

How to Handle Wireless Channel Reservations in DC Systems

The present invention relates to radio channel reservation processing in a digital enhanced cordless telecommunication (DECT) system, and in particular, in order to efficiently use a limited radio channel, a base station gives priority to use of a radio channel to a specific terminal, and according to a corresponding priority, The present invention relates to a radio channel reservation processing method in a DECT system for granting a right of use differently.

In the case of DECT system, which is widely used worldwide in the time division multiple access (TMDA) method, which is widely used worldwide, for example, if there is a board supporting wireless in one exchange system or a private exchange and a key phone system, As shown in FIG. 1, in a FT (Fixed Terminal) system serving as a base station of a DECT, a private exchange 100 connected to a general trunk line or an ISDN line, and the DECT data from the private exchange 100 are connected. It is composed of a plurality of base stations (110-1 ~ 110-N) that functions to actually transmit by RF.

In addition, as shown in FIG. 2, the DECT system 100a mounted on the private exchange 100 includes a voice signal processor 10, a controller 20, a memory unit 30, and a BMC. 40-1 to 40-n, the clock signal generator 50, and the interface units 60-1 to 60-n.

The plurality of BMCs (Burst Mode Controller) 40-1 to 40-n collect ADPCM data transmitted from the voice signal processor 10 in a TDMA manner according to a DECT characteristic, and each base station 110- 1 to 110-N, and transmits to RF, and transmits and receives voice data received from each of the base stations 110-1 to 110-N as ADPCM data.

The control unit 20 transmits and receives control data to and from the system, and controls the BMCs 40-1 to 40-n.

The memory unit 30 stores a program for processing the operation of the entire system, and temporarily stores data generated according to the operation of the program.

The voice signal processor 10 transmits and receives a PCM voice signal with the system, converts the PCM voice signal into an ADPCM, and removes echo from the voice.

The clock signal generator 50 generates a clock to operate the BMCs 40-1 to 40-n, and synchronizes the corresponding BMCs 40-1 to 40-n.

The interface units 60-1 to 60-n transmit the same DECT control data and voice data to the base stations 110-1 to 110-n.

Referring to performing the radio channel processing operation in the DECT system mounted on the conventional private exchange configured as described above, for example, as shown in Figure 1 of the accompanying drawings, the number of calls that one base station can handle Assuming that five, the first terminal to generate a new call to the exchange 100 through the base station to make a new call.

Accordingly, the exchange side sets the destination by checking the destination after translating the corresponding outgoing signal. In this case, the BMC 40-1 to 40-n is in charge of one cell and recognizes the maximum number of currently available calls. If the number currently being talked is not the maximum number of calls, the call is unconditionally accepted to make a call.

Thus, when a call is occupied by a wireless channel from the first terminal to the fifth terminal, the terminal that performs the call may continue to perform the call, even if another important terminal wants to request the call. Since the channel does not exist, the call cannot be made.

Thus, for example, even if a special person such as the president or the head of a company requests a call, if there is no empty channel, the call cannot be made.

As described above, in the conventional DECT system, the radio channel processing has a situation in which all terminals have the same importance in a limited channel of a specific base station, so even when a high priority person wants to make a call, the channel is not empty and thus a call cannot be made. In addition, when a terminal occupies all channels and makes a call, there is a problem that a base station does not know which terminal is requesting a call.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems. In the case where the DECT system makes an outgoing call in a specific base station by radio channel reservation processing, the priority is given to a specific terminal according to the priority of the call, so that the priority is high. The terminal reserves a channel so that the call can be made immediately through the reserved channel, and in case of an incoming call to a specific base station, the terminal can make an unconditional call regardless of the reserved channel, thereby enabling efficient use of the channel. .

1 is a block diagram of a radio channel processing in a conventional DECT system.

FIG. 2 is a block diagram showing the DECT system shown in FIG.

3 is a channel allocation diagram of a first base station shown in FIG.

4 is a block diagram illustrating a DECT system according to an embodiment of the present invention.

5 is a block diagram of a radio channel reservation process in a DECT system according to an embodiment of the present invention;

FIG. 6 is a configuration diagram of reservation allocation for a specific channel in the first base station shown in FIG. 5; FIG.

7 is a block diagram of a radio channel reservation process in a DECT system according to an embodiment of the present invention;

8 is a diagram illustrating a channel assignment for a specific channel reservation in the first base station shown in FIG.

FIG. 9 is a block diagram showing a priority database unit shown in FIG. 4; FIG.

FIG. 10 is a block diagram showing a BMC data base unit shown in FIG. 4; FIG.

11 is a flowchart illustrating a method for processing radio channel reservation in a DECT system according to an embodiment of the present invention.

Explanation of symbols on the main parts of the drawings

200: exchanger 200a: DECT system

210: voice signal processor 220: controller

230: priority processing unit 240: memory unit

250: priority database part 260: BMC database part

270-1 ~ 270-n: BMC 280: Clock signal generator

290-1 ~ 290-n: Interface part

110-1 to 110-n: base station

In order to achieve the above object, a feature of the present invention is a radio channel reservation processing method in a digital enhanced cordless telecommunication (DECT) system, the method comprising: reserving a channel according to a priority level with respect to a terminal belonging to a system; ; When a new call request is generated, checking whether the number of calls being processed reaches the maximum number of calls; Checking whether the new call request is an outgoing call from the terminal when the maximum number of calls is not reached; If the new call request is an outgoing call from the terminal, checking whether the sum of the number of reserved channels and the number of channels currently being talked is the maximum number of channels according to the priority level; Searching for a priority level of the originating signal generating terminal when the number of reserved channels and the number of channels currently being talked are the maximum number of channels; If the priority level of the originating signal generating terminal is the lowest level, disabling a call connection to the originating signal generating terminal and making a call unavailable; When the priority level of the originating signal generating terminal is a middle level, transmitting a ring tone to the terminal having the lowest priority in the call to interrupt the call and giving a call opportunity to the originating signal generating terminal; When the priority level of the call originating terminal is the highest level, making a call by immediately connecting through a reserved channel; When the new call request is not an outgoing call from the terminal but an incoming call to the terminal, the method may include making a call by connecting to an incoming target terminal belonging to the system through a reserved channel.

Meanwhile, the priority level of the terminal belonging to the system may be set for each base station.

In the DECT system, which is a TDMA system which is widely used in the wireless system according to the present invention, for example, there will be described a case where there is a board supporting radio in one switch system, a private switch, a key phone system, or the like. Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

As shown in FIG. 4, the DECT system 200a mounted in the private exchange 200 includes a voice signal processor 210, a controller 220, a priority processor 230, and a memory unit ( 240, priority database unit 250, BMC database unit 260, BMCs 270-1 to 270-n, clock signal generator 280, and interface unit 290-1. ~ 290-n).

The voice signal processor 210, the controller 220, the memory 240, the BMCs 270-1 to 270-n, the clock signal generator 280, and the interface unit 290-1 to 290-n) is the same as the conventional configuration description, and thus description thereof will be omitted.

The priority database unit 250 stores priority information given by the base stations 110-1 to 110-n for all the terminals registered in the system.

The BMC database unit 260 stores information of a terminal having a priority in each cell.

The priority processor 230 performs priority processing on the terminal.

The operation of the present invention configured as described above will be described in detail with reference to the accompanying drawings.

First, briefly, within each base station (110-1 ~ 110-n), a specific terminal always reserves a wireless channel to give a priority to call immediately at the moment you want to talk at any time to relax the call channel Make it available.

Then, for example, when the DECT system 200a is installed in one private exchange 200, as shown in FIG. 5, the number of calls that one base station can handle is five. Assuming that a terminal having a high priority of a call is in a reserved state, the first base station 110-1 has a specific terminal having the highest priority of 'A' in the attached base station. As shown in Fig. 6, one channel is always reserved for a specific terminal.

That is, in this situation, since one channel is reserved when five base stations 110-1 to 110-n can handle five channels, the first base station 110-1 can call the channel. It becomes four.

Thus, when all calls are made from the first terminal to the fourth terminal, even though a call is made through one empty channel through the fifth terminal, a specific terminal having a priority of 'A' is reserved and cannot be used.

For example, as shown in FIG. 7, when the DECT system 200a is similarly installed in one private switch 200, one base station 110-1 to 110-n is provided. Assuming that the number of calls that can be handled is 5, and a case where a reserved terminal requests a call due to a high priority of the call is explained, the first base station 110-1 has the highest priority as 'A'. When a specific terminal having a rank makes a call, as shown in FIG. 8, the call can be directly made to a reserved fourth time slot.

In this case, for example, when the terminal makes an outgoing call, the priority level of the call can be divided into three stages. First, the terminal having the lowest priority level is first set to 'C'. In this case, the terminal can make a call only to an empty channel and a channel not reserved. However, although the terminal having a priority of 'C', the incoming call to the terminal may use the reserved channel.

And, the second terminal having the highest level of priority defines the priority as 'A', the terminal having the priority 'A' in a specific base station is always reserved one channel. That is, whenever you want to talk, you always have the privilege to talk directly through this reserved channel.

And, the third terminal having the priority of the intermediate level is defined as the priority 'B', and can not be reserved for the call channel, but if the terminals all occupy the call channel, the priority 'C Rather than waiting for another terminal on a call, such as a terminal with ',' instead, it sends a ring tone to a lower priority 'C' terminal that it wants to talk but there is no empty channel. Therefore, the priority 'B' terminal does not use the channel of the priority 'A' terminal, but flexibly adjusts the communication channel by notifying the lower priority 'C' terminal that all current call channels are in use. can do.

Here, the information on the priority of all terminals registered in one DECT system as described above is stored in the priority database unit 250 as shown in FIG. 9.

And, it is important here that the privilege that the terminal is reserved for the channel is limited to a specific base station, and leaving the base station has a different level priority.

For example, the user of the 125 terminal is the vice president, and the priority level is 'A' in the second base station 110-2, but the priority level is 'B' in the third and fourth base stations 110-3 and 110-4. Will be changed to '.

In addition, the BMC 270-1 to 270-n in charge of one radio cell, that is, the base station, has a priority of 'A' in the base station and the terminal currently talking on the base stations 110-1 to 110-n. Since the information of the terminal 'must always be retained, as shown in FIG. 10, all of them must be stored in the BMC database unit 260.

Then, as shown in FIG. 11, in the case where the DECT system is installed in one private exchange, it is assumed that the number of calls that one base station can handle is 5 and the wireless channel processing is performed according to the priority. The operation will be described, each time a new call request occurs (step S1), whether or not the number of calls being processed by the BMC database unit 260 by the BMCs 270-1 through 270-n has reached the maximum number of calls. If it is confirmed (step S2), if the maximum number of calls has not been reached, it is checked whether the call request is an outgoing call (steps S2, S3).

At this time, when the terminal in the base stations 110-1 to 110-n requests transmission, it is checked whether the sum of the number of reserved communication channels and the number of channels currently being talked is the maximum number of channels (step S4). .

Accordingly, the BMC database unit 260 is searched by the BMCs 270-1 to 270-n, and when there is no free channel, that is, the number of channels reserved by the base station to be talked with and the number of channels currently being talked to. If the sum is the maximum number of channels, the priority of the originating request terminal is searched for (step S5).

Accordingly, when the BMCs 270-1 to 270-n search the priority database unit 250 and the corresponding base station 110-1 to 110-n has a priority of the corresponding originating request terminal 'C', Since the reserved channel cannot be used, the call request is ignored and a message of 'No Channel' is transmitted to the corresponding terminal, and the corresponding message is displayed on the corresponding terminal (step S6).

If the priority of the originating request terminal is 'B', the reserved channel cannot be used, and a call tone is transmitted to a busy terminal having a lower priority than the originating request terminal, thereby occupying all current call channels. Informing them that the call is made, the call is terminated as soon as possible, thereby creating an opportunity to talk to the calling request terminal (steps S7 and S8).

In the case where the priority of the originating request terminal is 'A', the call proceeds immediately through the reserved channel (step S9).

On the other hand, if the specific base station (110-1 ~ 110-n) reaches the maximum number of calls by searching the BMC database unit 260 in step S2 it is possible to ignore the call connection for the new call request to make a call (Step S10).

In addition, when the new call request is not generated by the terminal in the base stations 110-1 to 110-n making a call request in step S3, but occurs when an external trunk line or another terminal is called by a specific terminal, that is, an incoming call. The phone accepts the call request and returns to step S9 to connect the call.

In the step S4, the BMCs 270-1 to 270-n search the BMC data base unit 260 and, when there is a spare channel, that is, the number of reserved channels in the base station to which the call is to be made and is currently called. If the sum of the number of channels currently and the current number of channels does not reach the maximum number of channels, the flow returns to step S9 to make a call to the call originating request terminal.

In the above operation description, a case where priority is given to a specific terminal has been described as an example. However, the present invention is not limited thereto, and a system may be configured to always transmit when a call is requested by having a built-in priority in the terminal. You can also respond.

In addition, by separating the channels by priority, high-channel terminals can use the high-quality call channels with ease, and conversely, low-priority terminals may limit call, and not only wireless channels but also wired channels have priority. You can also reserve channels according to their rank.

As described above, in the DECT system, in the DECT system, when a radio channel reservation process is performed in a specific base station, priority is given to a specific terminal according to the priority of a call, and a terminal having a high priority reserves a channel and reserves a channel. Allows you to make a call directly through. In addition, in the case of an incoming call to a specific base station, the call can be made unconditionally regardless of the reserved channel, thereby enabling efficient use of the channel.

As described above, in the DECT system, the wireless channel reservation process gives priority to a specific terminal according to the priority of a call when the radio channel reservation processing is performed within a specific base station, and the terminal having a higher priority reserves and reserves a channel. Allows you to make a call directly through a reserved channel. In addition, in the case of an incoming call to a specific base station, the call can be made unconditionally regardless of the reserved channel, thereby enabling efficient use of the channel.

Claims (2)

In the wireless channel reservation processing method in a digital enhanced cordless telecommunication (DECT) system, Reserving a channel according to a priority level with respect to a terminal belonging to the system; When a new call request is generated, checking whether the number of calls being processed reaches the maximum number of calls; Checking whether the new call request is an outgoing call from the terminal when the maximum number of calls is not reached; If the new call request is an outgoing call from the terminal, checking whether the sum of the number of reserved channels and the number of channels currently being talked is the maximum number of channels according to the priority level; Searching for a priority level of the originating signal generating terminal when the number of reserved channels and the number of channels currently being talked are the maximum number of channels; If the priority level of the originating signal generating terminal is the lowest level, disabling a call connection to the originating signal generating terminal and making a call unavailable; When the priority level of the originating signal generating terminal is a middle level, transmitting a ring tone to the terminal having the lowest priority in the call to interrupt the call and giving a call opportunity to the originating signal generating terminal; When the priority level of the originating signal generating terminal is the highest level, making a call by immediately connecting through a reserved channel; And when the new call request is not an outgoing call from the terminal but an incoming call to the terminal, making a call by connecting to an incoming target terminal belonging to the system through a reserved channel. How to handle wireless channel reservations in the system. The method of claim 1, The priority level for the terminal belonging to the system is set to the base station radio channel reservation processing method, characterized in that for setting.