KR20110076092A

KR20110076092A - Repeater

Info

Publication number: KR20110076092A
Application number: KR1020090132707A
Authority: KR
Inventors: 이건주
Original assignee: 엘지에릭슨 주식회사
Priority date: 2009-12-29
Filing date: 2009-12-29
Publication date: 2011-07-06

Abstract

Disclosed herein are embodiments for a repeater in a digital wireless telephone communication system. According to an embodiment, a repeater used in a digital wireless telephone communication system, the terminal unit communicating with the base and the base unit for communicating with the terminal, the terminal unit and the base unit may be separated from each other to operate independently.

Description

Repeater {REPEATER}

The present invention relates to a digital wireless telephone system, and more particularly to a repeater in a digital wireless telephone system with an increased number of simultaneous calls.

Recently, due to the rapid development of communication, computer network, and semiconductor technology, various services using wireless communication networks are not only provided, but the demands of consumers are increasing day by day, and mobile communication technology is explosively increasing all over the world. ..

When installing multiple cells in a digital wireless telephone system using such a wireless communication network, a large number of bases must be installed to cover a large area, and also there must be no shadow areas of multiple cells in order to reduce noise and achieve seamless handover. do. At this time, a device for complementing the base is a repeater, which is used to extend the cell coverage of the base. Naturally, seamless handovers between these repeater-installed areas should be supported, and sufficient number of simultaneous calls should be ensured even when there are many users.

On the other hand, the nature of the repeater has a structure that acts as a terminal when communicating with the base, and acts as a base when communicating with the terminal. In addition, the communication chip in the repeater can process only one carrier frequency (carrier frequency). One frame used for communication consists of a total of 12 slots and is a slot used for communication between the repeater and the base, and one slot for signaling for synchronization, voice and data. One slot for traffic including information is used, and one slot for traffic including voice and data information is used as a slot used for communication between the repeater and the terminal, and one slot for signaling is described above. Used redundantly with one slot for one signaling, resulting in a total of three slots per call. Thus, in a digital cordless telephone system capable of a total of 12 slots, the conventional repeater only supports a total of four simultaneous calls.

An object of the present invention is to solve the above-mentioned problems of the prior art, and to provide a repeater to operate independently from each other by separating the base unit for communicating with the terminal and the terminal unit for communicating with the base. In the repeater of the present invention, since the terminal unit and the base unit are separated, the terminal unit and the base unit can use different carrier frequencies, respectively, so that the number of simultaneous calls can be increased.

According to one embodiment of the invention, there is provided a repeater for a digital wireless telephony communication system comprising a base. The repeater is a terminal unit for communicating with the base; And a base unit communicating with the terminal, wherein the terminal unit and the base unit are separated from each other to operate independently, and the terminal unit and the base unit may be connected to communicate with each other.

In one embodiment, the base and the terminal unit and the terminal and the base unit may communicate using different carrier frequencies.

In an embodiment, the terminal unit and the base unit may further include a synchronization unit for synchronizing the terminal unit and the base unit by applying the same driving clock.

In one embodiment, the driving clock may be in phase with the driving clock of the base.

In the conventional digital wireless telephone system, the repeater only supports a total of four simultaneous calls, but the repeater of the present invention can support a maximum of 11 simultaneous calls.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the present invention, when the same numbers indicate the components described in the drawings and the description, generally refer to the same components.

1 is a schematic diagram of an exemplary digital wireless telephone system 100 in which the present invention may be practiced. The digital radiotelephone system 100 may be a digital enhanced cordless telecommunications (DECT) system.

As shown in FIG. 1, the digital wireless telephone system 100 may include a repeater 110, a base 120, and a terminal 130. Although FIG. 1 illustrates that the digital wireless telephone system 100 includes two repeaters 110 and one terminal 130, this is for ease of explanation and the number and arrangement of them may be different.

FIG. 2 is a diagram illustrating an internal configuration of the repeater 110 shown in FIG. 1. It is noted that the components shown in FIG. 2 are exemplary, and each component may be integrated, separated, or omitted according to a design specification, and the connection relationship of each component may also be changed.

First, as shown in FIG. 2, the repeater 110 may include a terminal 112 communicating with the base 120 and a base 114 communicating with the terminal 130. In the related art, a single communication chip in the repeater performs communication between the terminal and the base, whereas in the present invention, the terminal 112 and the base 114 are separated in the repeater 110 to operate independently of each other. In an embodiment of the present invention, the terminal 112 and the base 114 may operate independently by using different chips.

While the repeater in the prior art uses only one carrier frequency, the terminal 112 and the base 114 in the present invention can use different carrier frequencies because the chips used are separate. In the DECT (Digital Enhanced Cordless Telecommunications) system, which is an embodiment of the digital radiotelephone system 100, the 20M band is divided into 10 bands within a range of 1.880 GHz to 1.90 GHz as a carrier frequency. Using the carrier frequency, the base unit 114 may use any one of the second to tenth carrier frequency. In addition, the PHS (Personal Handy System) (used in Japan), which is an embodiment of the digital wireless telephone system 100, uses 10 carrier frequencies, and the DCP (Digital Cordless Phone (used domestically)) uses three carrier frequencies. Also, the terminal 112 and the base 114 of the present invention may use different carrier frequencies, respectively.

As such, since the terminal 112 and the base 114 use different carrier frequencies used to communicate with the base 120 and the terminal 130, the respective communication frames used in the digital wireless telephony communication system are used. The remaining 11 slots are all slots for traffic except one slot for wireless synchronization (i.e., a slot for synchronization with the base at the terminal or a slot for synchronization with the terminal at the base) of the 12 available slots in the network. (I.e., slot for transmitting voice and data information during communication). Thus, the present embodiment can support 11 simultaneous calls.

The terminal unit 112 and the base unit 114 communicate with the base 120 and the terminal 130, respectively, and a signal including the communication information is transmitted and received between the terminal unit 112 and the base unit 114 in real time. Can be. To this end, the terminal 112 and the base 114 may be interconnected to enable communication. Examples of the means for connecting the terminal unit 112 and the base unit 114 so that communication is possible include Universal Asynchronous Receiver Transmitter (UART), Inter-Integrated Circuit (I2C), and System Packet Interface (SPI) technologies. It doesn't work. The above technique is known in the art of the present invention, and description thereof will be omitted.

In an embodiment of the present invention, the terminal 112 and the base 114 may include a Cosic module of Infineon Corporation used in Digital Enhanced Cordless Telephone (DECT). In addition, the terminal unit 112 may be manufactured using, for example, Infineon's PMB9603, and the base unit 114 may be manufactured using, for example, Infineon's PMB9616.

As shown in FIG. 2, the repeater 110 may further include a synchronizer 116. The synchronization unit 116 may synchronize the terminal unit 112 and the base unit 114 that operate independently from each other.

In one embodiment of the present invention, the synchronization unit 116 adjusts an arbitrary driving clock to the terminal unit 112 and the base unit 114 to match the driving clocks of the terminal unit 112 and the base unit 114. 114). Any drive clock may be in phase with the drive clock of base 120. In one embodiment any drive clock may be 20.736 MHz in phase with the drive clock of base 120. In one embodiment, when a driving clock that is in phase with the driving clock of the base 120 is supplied to the terminal 112 and the base 114, the communication frames at the terminal 112 and the base 114 are transferred to the base. The communication frame at the 120 and the terminal 130 may be synchronized, for example, within 4 μsec, preferably within 1 μsec.

In another embodiment of the present invention, the synchronization unit 116 may further include a field programmable gate array (FPGA). In one embodiment, the synchronization unit 116 is a synchronization field in the terminal unit 112 (where the synchronization field means the first 32 bits in each slot consisting of 480 bits in a frame of wireless communication resources in the digital wireless telephone communication system). And the FPGA can use this to generate any synchronization signal, such as 100 KHz. Thereafter, the driving clock may be supplied to the terminal 112 and the base 114 using the generated synchronization signal.

In addition, while the present invention has been described in connection with some embodiments, it is to be understood that various modifications and changes can be made without departing from the spirit and scope of the invention as will be understood by those skilled in the art. You will need to know It is also contemplated that such variations and modifications are within the scope of the claims appended hereto.

1 is a block diagram of an exemplary digital cordless telephone system in which the present invention may be practiced.

FIG. 2 is a diagram showing an internal configuration of the repeater shown in FIG. 1. FIG.

Claims

A repeater for a digital wireless telephony system comprising a base,

A terminal unit communicating with the base; And

It includes a base for communicating with the terminal,

And the terminal unit and the base unit are separated from each other and operate independently, and the terminal unit and the base unit are connected to communicate with each other.

The method of claim 1,

And the base unit and the terminal unit, and the terminal and the base unit each communicate using different carrier frequencies.

The method of claim 1,

And a synchronization unit for synchronizing the terminal unit and the base unit by applying the same driving clock to the terminal unit and the base unit.

The method of claim 3,

And the drive clock is in phase with the drive clock of the base.